Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 1 | /* |
| 2 | * PSA crypto layer on top of Mbed TLS crypto |
| 3 | */ |
| 4 | /* Copyright (C) 2018, ARM Limited, All Rights Reserved |
| 5 | * SPDX-License-Identifier: Apache-2.0 |
| 6 | * |
| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 8 | * not use this file except in compliance with the License. |
| 9 | * You may obtain a copy of the License at |
| 10 | * |
| 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | * |
| 13 | * Unless required by applicable law or agreed to in writing, software |
| 14 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 15 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | * See the License for the specific language governing permissions and |
| 17 | * limitations under the License. |
| 18 | * |
| 19 | * This file is part of mbed TLS (https://tls.mbed.org) |
| 20 | */ |
| 21 | |
| 22 | #if !defined(MBEDTLS_CONFIG_FILE) |
| 23 | #include "mbedtls/config.h" |
| 24 | #else |
| 25 | #include MBEDTLS_CONFIG_FILE |
| 26 | #endif |
| 27 | |
| 28 | #if defined(MBEDTLS_PSA_CRYPTO_C) |
mohammad1603 | 2701005 | 2018-07-03 13:16:15 +0300 | [diff] [blame] | 29 | |
itayzafrir | 7723ab1 | 2019-02-14 10:28:02 +0200 | [diff] [blame] | 30 | #include "psa_crypto_service_integration.h" |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 31 | #include "psa/crypto.h" |
| 32 | |
Gilles Peskine | 039b90c | 2018-12-07 18:24:41 +0100 | [diff] [blame] | 33 | #include "psa_crypto_core.h" |
Gilles Peskine | 5e76952 | 2018-11-20 21:59:56 +0100 | [diff] [blame] | 34 | #include "psa_crypto_invasive.h" |
Gilles Peskine | 961849f | 2018-11-30 18:54:54 +0100 | [diff] [blame] | 35 | #include "psa_crypto_slot_management.h" |
Darryl Green | d49a499 | 2018-06-18 17:27:26 +0100 | [diff] [blame] | 36 | /* Include internal declarations that are useful for implementing persistently |
| 37 | * stored keys. */ |
| 38 | #include "psa_crypto_storage.h" |
| 39 | |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 40 | #include <stdlib.h> |
| 41 | #include <string.h> |
| 42 | #if defined(MBEDTLS_PLATFORM_C) |
| 43 | #include "mbedtls/platform.h" |
| 44 | #else |
| 45 | #define mbedtls_calloc calloc |
| 46 | #define mbedtls_free free |
| 47 | #endif |
| 48 | |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 49 | #include "mbedtls/arc4.h" |
Gilles Peskine | 9a94480 | 2018-06-21 09:35:35 +0200 | [diff] [blame] | 50 | #include "mbedtls/asn1.h" |
Jaeden Amero | 6b19600 | 2019-01-10 10:23:21 +0000 | [diff] [blame] | 51 | #include "mbedtls/asn1write.h" |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 52 | #include "mbedtls/bignum.h" |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 53 | #include "mbedtls/blowfish.h" |
| 54 | #include "mbedtls/camellia.h" |
| 55 | #include "mbedtls/cipher.h" |
| 56 | #include "mbedtls/ccm.h" |
| 57 | #include "mbedtls/cmac.h" |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 58 | #include "mbedtls/ctr_drbg.h" |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 59 | #include "mbedtls/des.h" |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 60 | #include "mbedtls/ecdh.h" |
Gilles Peskine | 969ac72 | 2018-01-28 18:16:59 +0100 | [diff] [blame] | 61 | #include "mbedtls/ecp.h" |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 62 | #include "mbedtls/entropy.h" |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 63 | #include "mbedtls/error.h" |
| 64 | #include "mbedtls/gcm.h" |
| 65 | #include "mbedtls/md2.h" |
| 66 | #include "mbedtls/md4.h" |
| 67 | #include "mbedtls/md5.h" |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 68 | #include "mbedtls/md.h" |
| 69 | #include "mbedtls/md_internal.h" |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 70 | #include "mbedtls/pk.h" |
Gilles Peskine | 969ac72 | 2018-01-28 18:16:59 +0100 | [diff] [blame] | 71 | #include "mbedtls/pk_internal.h" |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 72 | #include "mbedtls/platform_util.h" |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 73 | #include "mbedtls/ripemd160.h" |
Gilles Peskine | 969ac72 | 2018-01-28 18:16:59 +0100 | [diff] [blame] | 74 | #include "mbedtls/rsa.h" |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 75 | #include "mbedtls/sha1.h" |
| 76 | #include "mbedtls/sha256.h" |
| 77 | #include "mbedtls/sha512.h" |
| 78 | #include "mbedtls/xtea.h" |
| 79 | |
Gilles Peskine | 996deb1 | 2018-08-01 15:45:45 +0200 | [diff] [blame] | 80 | #define ARRAY_LENGTH( array ) ( sizeof( array ) / sizeof( *( array ) ) ) |
| 81 | |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 82 | /* constant-time buffer comparison */ |
| 83 | static inline int safer_memcmp( const uint8_t *a, const uint8_t *b, size_t n ) |
| 84 | { |
| 85 | size_t i; |
| 86 | unsigned char diff = 0; |
| 87 | |
| 88 | for( i = 0; i < n; i++ ) |
| 89 | diff |= a[i] ^ b[i]; |
| 90 | |
| 91 | return( diff ); |
| 92 | } |
| 93 | |
| 94 | |
| 95 | |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 96 | /****************************************************************/ |
| 97 | /* Global data, support functions and library management */ |
| 98 | /****************************************************************/ |
| 99 | |
Gilles Peskine | 48c0ea1 | 2018-06-21 14:15:31 +0200 | [diff] [blame] | 100 | static int key_type_is_raw_bytes( psa_key_type_t type ) |
| 101 | { |
Gilles Peskine | 78b3bb6 | 2018-08-10 16:03:41 +0200 | [diff] [blame] | 102 | return( PSA_KEY_TYPE_IS_UNSTRUCTURED( type ) ); |
Gilles Peskine | 48c0ea1 | 2018-06-21 14:15:31 +0200 | [diff] [blame] | 103 | } |
| 104 | |
Gilles Peskine | 5a3c50e | 2018-12-04 12:27:09 +0100 | [diff] [blame] | 105 | /* Values for psa_global_data_t::rng_state */ |
| 106 | #define RNG_NOT_INITIALIZED 0 |
| 107 | #define RNG_INITIALIZED 1 |
| 108 | #define RNG_SEEDED 2 |
Gilles Peskine | c6b6907 | 2018-11-20 21:42:52 +0100 | [diff] [blame] | 109 | |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 110 | typedef struct |
| 111 | { |
Gilles Peskine | 5e76952 | 2018-11-20 21:59:56 +0100 | [diff] [blame] | 112 | void (* entropy_init )( mbedtls_entropy_context *ctx ); |
| 113 | void (* entropy_free )( mbedtls_entropy_context *ctx ); |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 114 | mbedtls_entropy_context entropy; |
| 115 | mbedtls_ctr_drbg_context ctr_drbg; |
Gilles Peskine | c6b6907 | 2018-11-20 21:42:52 +0100 | [diff] [blame] | 116 | unsigned initialized : 1; |
Gilles Peskine | 5a3c50e | 2018-12-04 12:27:09 +0100 | [diff] [blame] | 117 | unsigned rng_state : 2; |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 118 | } psa_global_data_t; |
| 119 | |
| 120 | static psa_global_data_t global_data; |
| 121 | |
itayzafrir | 0adf0fc | 2018-09-06 16:24:41 +0300 | [diff] [blame] | 122 | #define GUARD_MODULE_INITIALIZED \ |
| 123 | if( global_data.initialized == 0 ) \ |
| 124 | return( PSA_ERROR_BAD_STATE ); |
| 125 | |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 126 | static psa_status_t mbedtls_to_psa_error( int ret ) |
| 127 | { |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 128 | /* If there's both a high-level code and low-level code, dispatch on |
| 129 | * the high-level code. */ |
| 130 | switch( ret < -0x7f ? - ( -ret & 0x7f80 ) : ret ) |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 131 | { |
| 132 | case 0: |
| 133 | return( PSA_SUCCESS ); |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 134 | |
| 135 | case MBEDTLS_ERR_AES_INVALID_KEY_LENGTH: |
| 136 | case MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH: |
| 137 | case MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE: |
| 138 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 139 | case MBEDTLS_ERR_AES_HW_ACCEL_FAILED: |
| 140 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 141 | |
| 142 | case MBEDTLS_ERR_ARC4_HW_ACCEL_FAILED: |
| 143 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 144 | |
Gilles Peskine | 9a94480 | 2018-06-21 09:35:35 +0200 | [diff] [blame] | 145 | case MBEDTLS_ERR_ASN1_OUT_OF_DATA: |
| 146 | case MBEDTLS_ERR_ASN1_UNEXPECTED_TAG: |
| 147 | case MBEDTLS_ERR_ASN1_INVALID_LENGTH: |
| 148 | case MBEDTLS_ERR_ASN1_LENGTH_MISMATCH: |
| 149 | case MBEDTLS_ERR_ASN1_INVALID_DATA: |
| 150 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 151 | case MBEDTLS_ERR_ASN1_ALLOC_FAILED: |
| 152 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 153 | case MBEDTLS_ERR_ASN1_BUF_TOO_SMALL: |
| 154 | return( PSA_ERROR_BUFFER_TOO_SMALL ); |
| 155 | |
Jaeden Amero | 93e2111 | 2019-02-20 13:57:28 +0000 | [diff] [blame] | 156 | #if defined(MBEDTLS_ERR_BLOWFISH_BAD_INPUT_DATA) |
Jaeden Amero | 892cd6d | 2019-02-11 12:21:12 +0000 | [diff] [blame] | 157 | case MBEDTLS_ERR_BLOWFISH_BAD_INPUT_DATA: |
Jaeden Amero | 93e2111 | 2019-02-20 13:57:28 +0000 | [diff] [blame] | 158 | #elif defined(MBEDTLS_ERR_BLOWFISH_INVALID_KEY_LENGTH) |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 159 | case MBEDTLS_ERR_BLOWFISH_INVALID_KEY_LENGTH: |
Jaeden Amero | 93e2111 | 2019-02-20 13:57:28 +0000 | [diff] [blame] | 160 | #endif |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 161 | case MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH: |
| 162 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 163 | case MBEDTLS_ERR_BLOWFISH_HW_ACCEL_FAILED: |
| 164 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 165 | |
Jaeden Amero | 93e2111 | 2019-02-20 13:57:28 +0000 | [diff] [blame] | 166 | #if defined(MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA) |
Jaeden Amero | 892cd6d | 2019-02-11 12:21:12 +0000 | [diff] [blame] | 167 | case MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA: |
Jaeden Amero | 93e2111 | 2019-02-20 13:57:28 +0000 | [diff] [blame] | 168 | #elif defined(MBEDTLS_ERR_CAMELLIA_INVALID_KEY_LENGTH) |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 169 | case MBEDTLS_ERR_CAMELLIA_INVALID_KEY_LENGTH: |
Jaeden Amero | 93e2111 | 2019-02-20 13:57:28 +0000 | [diff] [blame] | 170 | #endif |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 171 | case MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH: |
| 172 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 173 | case MBEDTLS_ERR_CAMELLIA_HW_ACCEL_FAILED: |
| 174 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 175 | |
| 176 | case MBEDTLS_ERR_CCM_BAD_INPUT: |
| 177 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 178 | case MBEDTLS_ERR_CCM_AUTH_FAILED: |
| 179 | return( PSA_ERROR_INVALID_SIGNATURE ); |
| 180 | case MBEDTLS_ERR_CCM_HW_ACCEL_FAILED: |
| 181 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 182 | |
| 183 | case MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE: |
| 184 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 185 | case MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA: |
| 186 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 187 | case MBEDTLS_ERR_CIPHER_ALLOC_FAILED: |
| 188 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 189 | case MBEDTLS_ERR_CIPHER_INVALID_PADDING: |
| 190 | return( PSA_ERROR_INVALID_PADDING ); |
| 191 | case MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED: |
| 192 | return( PSA_ERROR_BAD_STATE ); |
| 193 | case MBEDTLS_ERR_CIPHER_AUTH_FAILED: |
| 194 | return( PSA_ERROR_INVALID_SIGNATURE ); |
| 195 | case MBEDTLS_ERR_CIPHER_INVALID_CONTEXT: |
| 196 | return( PSA_ERROR_TAMPERING_DETECTED ); |
| 197 | case MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED: |
| 198 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 199 | |
| 200 | case MBEDTLS_ERR_CMAC_HW_ACCEL_FAILED: |
| 201 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 202 | |
| 203 | case MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED: |
| 204 | return( PSA_ERROR_INSUFFICIENT_ENTROPY ); |
| 205 | case MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG: |
| 206 | case MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG: |
| 207 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 208 | case MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR: |
| 209 | return( PSA_ERROR_INSUFFICIENT_ENTROPY ); |
| 210 | |
| 211 | case MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH: |
| 212 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 213 | case MBEDTLS_ERR_DES_HW_ACCEL_FAILED: |
| 214 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 215 | |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 216 | case MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED: |
| 217 | case MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE: |
| 218 | case MBEDTLS_ERR_ENTROPY_SOURCE_FAILED: |
| 219 | return( PSA_ERROR_INSUFFICIENT_ENTROPY ); |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 220 | |
| 221 | case MBEDTLS_ERR_GCM_AUTH_FAILED: |
| 222 | return( PSA_ERROR_INVALID_SIGNATURE ); |
| 223 | case MBEDTLS_ERR_GCM_BAD_INPUT: |
Gilles Peskine | 8cac2e6 | 2018-08-21 15:07:38 +0200 | [diff] [blame] | 224 | return( PSA_ERROR_INVALID_ARGUMENT ); |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 225 | case MBEDTLS_ERR_GCM_HW_ACCEL_FAILED: |
| 226 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 227 | |
| 228 | case MBEDTLS_ERR_MD2_HW_ACCEL_FAILED: |
| 229 | case MBEDTLS_ERR_MD4_HW_ACCEL_FAILED: |
| 230 | case MBEDTLS_ERR_MD5_HW_ACCEL_FAILED: |
| 231 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 232 | |
| 233 | case MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE: |
| 234 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 235 | case MBEDTLS_ERR_MD_BAD_INPUT_DATA: |
| 236 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 237 | case MBEDTLS_ERR_MD_ALLOC_FAILED: |
| 238 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 239 | case MBEDTLS_ERR_MD_FILE_IO_ERROR: |
| 240 | return( PSA_ERROR_STORAGE_FAILURE ); |
| 241 | case MBEDTLS_ERR_MD_HW_ACCEL_FAILED: |
| 242 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 243 | |
Gilles Peskine | f76aa77 | 2018-10-29 19:24:33 +0100 | [diff] [blame] | 244 | case MBEDTLS_ERR_MPI_FILE_IO_ERROR: |
| 245 | return( PSA_ERROR_STORAGE_FAILURE ); |
| 246 | case MBEDTLS_ERR_MPI_BAD_INPUT_DATA: |
| 247 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 248 | case MBEDTLS_ERR_MPI_INVALID_CHARACTER: |
| 249 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 250 | case MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL: |
| 251 | return( PSA_ERROR_BUFFER_TOO_SMALL ); |
| 252 | case MBEDTLS_ERR_MPI_NEGATIVE_VALUE: |
| 253 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 254 | case MBEDTLS_ERR_MPI_DIVISION_BY_ZERO: |
| 255 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 256 | case MBEDTLS_ERR_MPI_NOT_ACCEPTABLE: |
| 257 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 258 | case MBEDTLS_ERR_MPI_ALLOC_FAILED: |
| 259 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 260 | |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 261 | case MBEDTLS_ERR_PK_ALLOC_FAILED: |
| 262 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 263 | case MBEDTLS_ERR_PK_TYPE_MISMATCH: |
| 264 | case MBEDTLS_ERR_PK_BAD_INPUT_DATA: |
| 265 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 266 | case MBEDTLS_ERR_PK_FILE_IO_ERROR: |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 267 | return( PSA_ERROR_STORAGE_FAILURE ); |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 268 | case MBEDTLS_ERR_PK_KEY_INVALID_VERSION: |
| 269 | case MBEDTLS_ERR_PK_KEY_INVALID_FORMAT: |
| 270 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 271 | case MBEDTLS_ERR_PK_UNKNOWN_PK_ALG: |
| 272 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 273 | case MBEDTLS_ERR_PK_PASSWORD_REQUIRED: |
| 274 | case MBEDTLS_ERR_PK_PASSWORD_MISMATCH: |
| 275 | return( PSA_ERROR_NOT_PERMITTED ); |
| 276 | case MBEDTLS_ERR_PK_INVALID_PUBKEY: |
| 277 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 278 | case MBEDTLS_ERR_PK_INVALID_ALG: |
| 279 | case MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE: |
| 280 | case MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE: |
| 281 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 282 | case MBEDTLS_ERR_PK_SIG_LEN_MISMATCH: |
| 283 | return( PSA_ERROR_INVALID_SIGNATURE ); |
Gilles Peskine | a590529 | 2018-02-07 20:59:33 +0100 | [diff] [blame] | 284 | case MBEDTLS_ERR_PK_HW_ACCEL_FAILED: |
| 285 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 286 | |
| 287 | case MBEDTLS_ERR_RIPEMD160_HW_ACCEL_FAILED: |
| 288 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 289 | |
| 290 | case MBEDTLS_ERR_RSA_BAD_INPUT_DATA: |
| 291 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 292 | case MBEDTLS_ERR_RSA_INVALID_PADDING: |
| 293 | return( PSA_ERROR_INVALID_PADDING ); |
| 294 | case MBEDTLS_ERR_RSA_KEY_GEN_FAILED: |
| 295 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 296 | case MBEDTLS_ERR_RSA_KEY_CHECK_FAILED: |
| 297 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 298 | case MBEDTLS_ERR_RSA_PUBLIC_FAILED: |
| 299 | case MBEDTLS_ERR_RSA_PRIVATE_FAILED: |
| 300 | return( PSA_ERROR_TAMPERING_DETECTED ); |
| 301 | case MBEDTLS_ERR_RSA_VERIFY_FAILED: |
| 302 | return( PSA_ERROR_INVALID_SIGNATURE ); |
| 303 | case MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE: |
| 304 | return( PSA_ERROR_BUFFER_TOO_SMALL ); |
| 305 | case MBEDTLS_ERR_RSA_RNG_FAILED: |
| 306 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 307 | case MBEDTLS_ERR_RSA_UNSUPPORTED_OPERATION: |
| 308 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 309 | case MBEDTLS_ERR_RSA_HW_ACCEL_FAILED: |
| 310 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 311 | |
| 312 | case MBEDTLS_ERR_SHA1_HW_ACCEL_FAILED: |
| 313 | case MBEDTLS_ERR_SHA256_HW_ACCEL_FAILED: |
| 314 | case MBEDTLS_ERR_SHA512_HW_ACCEL_FAILED: |
| 315 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 316 | |
| 317 | case MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH: |
| 318 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 319 | case MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED: |
| 320 | return( PSA_ERROR_HARDWARE_FAILURE ); |
| 321 | |
itayzafrir | 5c75339 | 2018-05-08 11:18:38 +0300 | [diff] [blame] | 322 | case MBEDTLS_ERR_ECP_BAD_INPUT_DATA: |
itayzafrir | 7b30f8b | 2018-05-09 16:07:36 +0300 | [diff] [blame] | 323 | case MBEDTLS_ERR_ECP_INVALID_KEY: |
itayzafrir | 5c75339 | 2018-05-08 11:18:38 +0300 | [diff] [blame] | 324 | return( PSA_ERROR_INVALID_ARGUMENT ); |
itayzafrir | 7b30f8b | 2018-05-09 16:07:36 +0300 | [diff] [blame] | 325 | case MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL: |
| 326 | return( PSA_ERROR_BUFFER_TOO_SMALL ); |
| 327 | case MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE: |
| 328 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 329 | case MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH: |
| 330 | case MBEDTLS_ERR_ECP_VERIFY_FAILED: |
| 331 | return( PSA_ERROR_INVALID_SIGNATURE ); |
| 332 | case MBEDTLS_ERR_ECP_ALLOC_FAILED: |
| 333 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 334 | case MBEDTLS_ERR_ECP_HW_ACCEL_FAILED: |
| 335 | return( PSA_ERROR_HARDWARE_FAILURE ); |
itayzafrir | 5c75339 | 2018-05-08 11:18:38 +0300 | [diff] [blame] | 336 | |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 337 | default: |
David Saada | b4ecc27 | 2019-02-14 13:48:10 +0200 | [diff] [blame] | 338 | return( PSA_ERROR_GENERIC_ERROR ); |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 339 | } |
| 340 | } |
| 341 | |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 342 | |
Gilles Peskine | 7bcfc0a | 2018-06-18 21:49:39 +0200 | [diff] [blame] | 343 | |
| 344 | |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 345 | /****************************************************************/ |
| 346 | /* Key management */ |
| 347 | /****************************************************************/ |
| 348 | |
Darryl Green | 8f8aa8f | 2018-07-24 15:44:51 +0100 | [diff] [blame] | 349 | #if defined(MBEDTLS_ECP_C) |
Gilles Peskine | 34ef7f5 | 2018-06-18 20:47:51 +0200 | [diff] [blame] | 350 | static psa_ecc_curve_t mbedtls_ecc_group_to_psa( mbedtls_ecp_group_id grpid ) |
| 351 | { |
| 352 | switch( grpid ) |
| 353 | { |
| 354 | case MBEDTLS_ECP_DP_SECP192R1: |
| 355 | return( PSA_ECC_CURVE_SECP192R1 ); |
| 356 | case MBEDTLS_ECP_DP_SECP224R1: |
| 357 | return( PSA_ECC_CURVE_SECP224R1 ); |
| 358 | case MBEDTLS_ECP_DP_SECP256R1: |
| 359 | return( PSA_ECC_CURVE_SECP256R1 ); |
| 360 | case MBEDTLS_ECP_DP_SECP384R1: |
| 361 | return( PSA_ECC_CURVE_SECP384R1 ); |
| 362 | case MBEDTLS_ECP_DP_SECP521R1: |
| 363 | return( PSA_ECC_CURVE_SECP521R1 ); |
| 364 | case MBEDTLS_ECP_DP_BP256R1: |
| 365 | return( PSA_ECC_CURVE_BRAINPOOL_P256R1 ); |
| 366 | case MBEDTLS_ECP_DP_BP384R1: |
| 367 | return( PSA_ECC_CURVE_BRAINPOOL_P384R1 ); |
| 368 | case MBEDTLS_ECP_DP_BP512R1: |
| 369 | return( PSA_ECC_CURVE_BRAINPOOL_P512R1 ); |
| 370 | case MBEDTLS_ECP_DP_CURVE25519: |
| 371 | return( PSA_ECC_CURVE_CURVE25519 ); |
| 372 | case MBEDTLS_ECP_DP_SECP192K1: |
| 373 | return( PSA_ECC_CURVE_SECP192K1 ); |
| 374 | case MBEDTLS_ECP_DP_SECP224K1: |
| 375 | return( PSA_ECC_CURVE_SECP224K1 ); |
| 376 | case MBEDTLS_ECP_DP_SECP256K1: |
| 377 | return( PSA_ECC_CURVE_SECP256K1 ); |
| 378 | case MBEDTLS_ECP_DP_CURVE448: |
| 379 | return( PSA_ECC_CURVE_CURVE448 ); |
| 380 | default: |
| 381 | return( 0 ); |
| 382 | } |
| 383 | } |
| 384 | |
Gilles Peskine | 12313cd | 2018-06-20 00:20:32 +0200 | [diff] [blame] | 385 | static mbedtls_ecp_group_id mbedtls_ecc_group_of_psa( psa_ecc_curve_t curve ) |
| 386 | { |
| 387 | switch( curve ) |
| 388 | { |
| 389 | case PSA_ECC_CURVE_SECP192R1: |
| 390 | return( MBEDTLS_ECP_DP_SECP192R1 ); |
| 391 | case PSA_ECC_CURVE_SECP224R1: |
| 392 | return( MBEDTLS_ECP_DP_SECP224R1 ); |
| 393 | case PSA_ECC_CURVE_SECP256R1: |
| 394 | return( MBEDTLS_ECP_DP_SECP256R1 ); |
| 395 | case PSA_ECC_CURVE_SECP384R1: |
| 396 | return( MBEDTLS_ECP_DP_SECP384R1 ); |
| 397 | case PSA_ECC_CURVE_SECP521R1: |
| 398 | return( MBEDTLS_ECP_DP_SECP521R1 ); |
| 399 | case PSA_ECC_CURVE_BRAINPOOL_P256R1: |
| 400 | return( MBEDTLS_ECP_DP_BP256R1 ); |
| 401 | case PSA_ECC_CURVE_BRAINPOOL_P384R1: |
| 402 | return( MBEDTLS_ECP_DP_BP384R1 ); |
| 403 | case PSA_ECC_CURVE_BRAINPOOL_P512R1: |
| 404 | return( MBEDTLS_ECP_DP_BP512R1 ); |
| 405 | case PSA_ECC_CURVE_CURVE25519: |
| 406 | return( MBEDTLS_ECP_DP_CURVE25519 ); |
| 407 | case PSA_ECC_CURVE_SECP192K1: |
| 408 | return( MBEDTLS_ECP_DP_SECP192K1 ); |
| 409 | case PSA_ECC_CURVE_SECP224K1: |
| 410 | return( MBEDTLS_ECP_DP_SECP224K1 ); |
| 411 | case PSA_ECC_CURVE_SECP256K1: |
| 412 | return( MBEDTLS_ECP_DP_SECP256K1 ); |
| 413 | case PSA_ECC_CURVE_CURVE448: |
| 414 | return( MBEDTLS_ECP_DP_CURVE448 ); |
| 415 | default: |
| 416 | return( MBEDTLS_ECP_DP_NONE ); |
| 417 | } |
| 418 | } |
Darryl Green | 8f8aa8f | 2018-07-24 15:44:51 +0100 | [diff] [blame] | 419 | #endif /* defined(MBEDTLS_ECP_C) */ |
Gilles Peskine | 12313cd | 2018-06-20 00:20:32 +0200 | [diff] [blame] | 420 | |
Gilles Peskine | 0ff4b0f | 2018-06-19 21:31:50 +0200 | [diff] [blame] | 421 | static psa_status_t prepare_raw_data_slot( psa_key_type_t type, |
| 422 | size_t bits, |
| 423 | struct raw_data *raw ) |
| 424 | { |
| 425 | /* Check that the bit size is acceptable for the key type */ |
| 426 | switch( type ) |
| 427 | { |
| 428 | case PSA_KEY_TYPE_RAW_DATA: |
Gilles Peskine | 46f1fd7 | 2018-06-28 19:31:31 +0200 | [diff] [blame] | 429 | if( bits == 0 ) |
| 430 | { |
| 431 | raw->bytes = 0; |
| 432 | raw->data = NULL; |
| 433 | return( PSA_SUCCESS ); |
| 434 | } |
| 435 | break; |
Gilles Peskine | 0ff4b0f | 2018-06-19 21:31:50 +0200 | [diff] [blame] | 436 | #if defined(MBEDTLS_MD_C) |
| 437 | case PSA_KEY_TYPE_HMAC: |
Gilles Peskine | 46f1fd7 | 2018-06-28 19:31:31 +0200 | [diff] [blame] | 438 | #endif |
Gilles Peskine | ea0fb49 | 2018-07-12 17:17:20 +0200 | [diff] [blame] | 439 | case PSA_KEY_TYPE_DERIVE: |
| 440 | break; |
Gilles Peskine | 0ff4b0f | 2018-06-19 21:31:50 +0200 | [diff] [blame] | 441 | #if defined(MBEDTLS_AES_C) |
| 442 | case PSA_KEY_TYPE_AES: |
| 443 | if( bits != 128 && bits != 192 && bits != 256 ) |
| 444 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 445 | break; |
| 446 | #endif |
| 447 | #if defined(MBEDTLS_CAMELLIA_C) |
| 448 | case PSA_KEY_TYPE_CAMELLIA: |
| 449 | if( bits != 128 && bits != 192 && bits != 256 ) |
| 450 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 451 | break; |
| 452 | #endif |
| 453 | #if defined(MBEDTLS_DES_C) |
| 454 | case PSA_KEY_TYPE_DES: |
| 455 | if( bits != 64 && bits != 128 && bits != 192 ) |
| 456 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 457 | break; |
| 458 | #endif |
| 459 | #if defined(MBEDTLS_ARC4_C) |
| 460 | case PSA_KEY_TYPE_ARC4: |
| 461 | if( bits < 8 || bits > 2048 ) |
| 462 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 463 | break; |
| 464 | #endif |
| 465 | default: |
| 466 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 467 | } |
Gilles Peskine | b54979a | 2018-06-21 09:32:47 +0200 | [diff] [blame] | 468 | if( bits % 8 != 0 ) |
| 469 | return( PSA_ERROR_INVALID_ARGUMENT ); |
Gilles Peskine | 0ff4b0f | 2018-06-19 21:31:50 +0200 | [diff] [blame] | 470 | |
| 471 | /* Allocate memory for the key */ |
| 472 | raw->bytes = PSA_BITS_TO_BYTES( bits ); |
| 473 | raw->data = mbedtls_calloc( 1, raw->bytes ); |
| 474 | if( raw->data == NULL ) |
| 475 | { |
| 476 | raw->bytes = 0; |
| 477 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 478 | } |
| 479 | return( PSA_SUCCESS ); |
| 480 | } |
| 481 | |
Gilles Peskine | af89fd7 | 2018-06-29 19:52:37 +0200 | [diff] [blame] | 482 | #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PK_PARSE_C) |
Gilles Peskine | 86a440b | 2018-11-12 18:39:40 +0100 | [diff] [blame] | 483 | /* Mbed TLS doesn't support non-byte-aligned key sizes (i.e. key sizes |
| 484 | * that are not a multiple of 8) well. For example, there is only |
| 485 | * mbedtls_rsa_get_len(), which returns a number of bytes, and no |
| 486 | * way to return the exact bit size of a key. |
| 487 | * To keep things simple, reject non-byte-aligned key sizes. */ |
| 488 | static psa_status_t psa_check_rsa_key_byte_aligned( |
| 489 | const mbedtls_rsa_context *rsa ) |
| 490 | { |
| 491 | mbedtls_mpi n; |
| 492 | psa_status_t status; |
| 493 | mbedtls_mpi_init( &n ); |
| 494 | status = mbedtls_to_psa_error( |
| 495 | mbedtls_rsa_export( rsa, &n, NULL, NULL, NULL, NULL ) ); |
| 496 | if( status == PSA_SUCCESS ) |
| 497 | { |
| 498 | if( mbedtls_mpi_bitlen( &n ) % 8 != 0 ) |
| 499 | status = PSA_ERROR_NOT_SUPPORTED; |
| 500 | } |
| 501 | mbedtls_mpi_free( &n ); |
| 502 | return( status ); |
| 503 | } |
| 504 | |
Jaeden Amero | ec6ff86 | 2019-01-11 17:53:05 +0000 | [diff] [blame] | 505 | static psa_status_t psa_import_rsa_key( psa_key_type_t type, |
| 506 | const uint8_t *data, |
| 507 | size_t data_length, |
Gilles Peskine | af89fd7 | 2018-06-29 19:52:37 +0200 | [diff] [blame] | 508 | mbedtls_rsa_context **p_rsa ) |
| 509 | { |
Jaeden Amero | ec6ff86 | 2019-01-11 17:53:05 +0000 | [diff] [blame] | 510 | psa_status_t status; |
| 511 | mbedtls_pk_context pk; |
| 512 | mbedtls_rsa_context *rsa; |
| 513 | size_t bits; |
| 514 | |
| 515 | mbedtls_pk_init( &pk ); |
| 516 | |
| 517 | /* Parse the data. */ |
| 518 | if( PSA_KEY_TYPE_IS_KEYPAIR( type ) ) |
| 519 | status = mbedtls_to_psa_error( |
| 520 | mbedtls_pk_parse_key( &pk, data, data_length, NULL, 0 ) ); |
Gilles Peskine | af89fd7 | 2018-06-29 19:52:37 +0200 | [diff] [blame] | 521 | else |
Jaeden Amero | ec6ff86 | 2019-01-11 17:53:05 +0000 | [diff] [blame] | 522 | status = mbedtls_to_psa_error( |
| 523 | mbedtls_pk_parse_public_key( &pk, data, data_length ) ); |
| 524 | if( status != PSA_SUCCESS ) |
| 525 | goto exit; |
| 526 | |
| 527 | /* We have something that the pkparse module recognizes. If it is a |
| 528 | * valid RSA key, store it. */ |
| 529 | if( mbedtls_pk_get_type( &pk ) != MBEDTLS_PK_RSA ) |
Gilles Peskine | af89fd7 | 2018-06-29 19:52:37 +0200 | [diff] [blame] | 530 | { |
Jaeden Amero | ec6ff86 | 2019-01-11 17:53:05 +0000 | [diff] [blame] | 531 | status = PSA_ERROR_INVALID_ARGUMENT; |
| 532 | goto exit; |
Gilles Peskine | af89fd7 | 2018-06-29 19:52:37 +0200 | [diff] [blame] | 533 | } |
Jaeden Amero | ec6ff86 | 2019-01-11 17:53:05 +0000 | [diff] [blame] | 534 | |
| 535 | rsa = mbedtls_pk_rsa( pk ); |
| 536 | /* The size of an RSA key doesn't have to be a multiple of 8. Mbed TLS |
| 537 | * supports non-byte-aligned key sizes, but not well. For example, |
| 538 | * mbedtls_rsa_get_len() returns the key size in bytes, not in bits. */ |
| 539 | bits = PSA_BYTES_TO_BITS( mbedtls_rsa_get_len( rsa ) ); |
| 540 | if( bits > PSA_VENDOR_RSA_MAX_KEY_BITS ) |
| 541 | { |
| 542 | status = PSA_ERROR_NOT_SUPPORTED; |
| 543 | goto exit; |
| 544 | } |
| 545 | status = psa_check_rsa_key_byte_aligned( rsa ); |
| 546 | |
| 547 | exit: |
| 548 | /* Free the content of the pk object only on error. */ |
| 549 | if( status != PSA_SUCCESS ) |
| 550 | { |
| 551 | mbedtls_pk_free( &pk ); |
| 552 | return( status ); |
| 553 | } |
| 554 | |
| 555 | /* On success, store the content of the object in the RSA context. */ |
| 556 | *p_rsa = rsa; |
| 557 | |
| 558 | return( PSA_SUCCESS ); |
Gilles Peskine | af89fd7 | 2018-06-29 19:52:37 +0200 | [diff] [blame] | 559 | } |
| 560 | #endif /* defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PK_PARSE_C) */ |
| 561 | |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 562 | #if defined(MBEDTLS_ECP_C) |
| 563 | |
| 564 | /* Import a public key given as the uncompressed representation defined by SEC1 |
| 565 | * 2.3.3 as the content of an ECPoint. */ |
| 566 | static psa_status_t psa_import_ec_public_key( psa_ecc_curve_t curve, |
| 567 | const uint8_t *data, |
| 568 | size_t data_length, |
| 569 | mbedtls_ecp_keypair **p_ecp ) |
Gilles Peskine | af89fd7 | 2018-06-29 19:52:37 +0200 | [diff] [blame] | 570 | { |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 571 | psa_status_t status = PSA_ERROR_TAMPERING_DETECTED; |
| 572 | mbedtls_ecp_keypair *ecp = NULL; |
| 573 | mbedtls_ecp_group_id grp_id = mbedtls_ecc_group_of_psa( curve ); |
| 574 | |
| 575 | *p_ecp = NULL; |
| 576 | ecp = mbedtls_calloc( 1, sizeof( *ecp ) ); |
| 577 | if( ecp == NULL ) |
| 578 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 579 | mbedtls_ecp_keypair_init( ecp ); |
| 580 | |
| 581 | /* Load the group. */ |
| 582 | status = mbedtls_to_psa_error( |
| 583 | mbedtls_ecp_group_load( &ecp->grp, grp_id ) ); |
| 584 | if( status != PSA_SUCCESS ) |
| 585 | goto exit; |
| 586 | /* Load the public value. */ |
| 587 | status = mbedtls_to_psa_error( |
| 588 | mbedtls_ecp_point_read_binary( &ecp->grp, &ecp->Q, |
| 589 | data, data_length ) ); |
| 590 | if( status != PSA_SUCCESS ) |
| 591 | goto exit; |
| 592 | |
| 593 | /* Check that the point is on the curve. */ |
| 594 | status = mbedtls_to_psa_error( |
| 595 | mbedtls_ecp_check_pubkey( &ecp->grp, &ecp->Q ) ); |
| 596 | if( status != PSA_SUCCESS ) |
| 597 | goto exit; |
| 598 | |
| 599 | *p_ecp = ecp; |
| 600 | return( PSA_SUCCESS ); |
| 601 | |
| 602 | exit: |
| 603 | if( ecp != NULL ) |
Gilles Peskine | af89fd7 | 2018-06-29 19:52:37 +0200 | [diff] [blame] | 604 | { |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 605 | mbedtls_ecp_keypair_free( ecp ); |
| 606 | mbedtls_free( ecp ); |
Gilles Peskine | af89fd7 | 2018-06-29 19:52:37 +0200 | [diff] [blame] | 607 | } |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 608 | return( status ); |
Gilles Peskine | af89fd7 | 2018-06-29 19:52:37 +0200 | [diff] [blame] | 609 | } |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 610 | #endif /* defined(MBEDTLS_ECP_C) */ |
Gilles Peskine | af89fd7 | 2018-06-29 19:52:37 +0200 | [diff] [blame] | 611 | |
Gilles Peskine | f76aa77 | 2018-10-29 19:24:33 +0100 | [diff] [blame] | 612 | #if defined(MBEDTLS_ECP_C) |
| 613 | /* Import a private key given as a byte string which is the private value |
| 614 | * in big-endian order. */ |
| 615 | static psa_status_t psa_import_ec_private_key( psa_ecc_curve_t curve, |
| 616 | const uint8_t *data, |
| 617 | size_t data_length, |
| 618 | mbedtls_ecp_keypair **p_ecp ) |
| 619 | { |
| 620 | psa_status_t status = PSA_ERROR_TAMPERING_DETECTED; |
| 621 | mbedtls_ecp_keypair *ecp = NULL; |
| 622 | mbedtls_ecp_group_id grp_id = mbedtls_ecc_group_of_psa( curve ); |
| 623 | |
| 624 | *p_ecp = NULL; |
| 625 | ecp = mbedtls_calloc( 1, sizeof( mbedtls_ecp_keypair ) ); |
| 626 | if( ecp == NULL ) |
| 627 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
Jaeden Amero | 83d2939 | 2019-01-10 20:17:42 +0000 | [diff] [blame] | 628 | mbedtls_ecp_keypair_init( ecp ); |
Gilles Peskine | f76aa77 | 2018-10-29 19:24:33 +0100 | [diff] [blame] | 629 | |
| 630 | /* Load the group. */ |
| 631 | status = mbedtls_to_psa_error( |
| 632 | mbedtls_ecp_group_load( &ecp->grp, grp_id ) ); |
| 633 | if( status != PSA_SUCCESS ) |
| 634 | goto exit; |
| 635 | /* Load the secret value. */ |
| 636 | status = mbedtls_to_psa_error( |
| 637 | mbedtls_mpi_read_binary( &ecp->d, data, data_length ) ); |
| 638 | if( status != PSA_SUCCESS ) |
| 639 | goto exit; |
| 640 | /* Validate the private key. */ |
| 641 | status = mbedtls_to_psa_error( |
| 642 | mbedtls_ecp_check_privkey( &ecp->grp, &ecp->d ) ); |
| 643 | if( status != PSA_SUCCESS ) |
| 644 | goto exit; |
| 645 | /* Calculate the public key from the private key. */ |
| 646 | status = mbedtls_to_psa_error( |
| 647 | mbedtls_ecp_mul( &ecp->grp, &ecp->Q, &ecp->d, &ecp->grp.G, |
| 648 | mbedtls_ctr_drbg_random, &global_data.ctr_drbg ) ); |
| 649 | if( status != PSA_SUCCESS ) |
| 650 | goto exit; |
| 651 | |
| 652 | *p_ecp = ecp; |
| 653 | return( PSA_SUCCESS ); |
| 654 | |
| 655 | exit: |
| 656 | if( ecp != NULL ) |
| 657 | { |
| 658 | mbedtls_ecp_keypair_free( ecp ); |
| 659 | mbedtls_free( ecp ); |
| 660 | } |
| 661 | return( status ); |
| 662 | } |
| 663 | #endif /* defined(MBEDTLS_ECP_C) */ |
| 664 | |
Gilles Peskine | f77ed1f | 2018-12-03 11:58:46 +0100 | [diff] [blame] | 665 | /** Import key data into a slot. `slot->type` must have been set |
| 666 | * previously. This function assumes that the slot does not contain |
| 667 | * any key material yet. On failure, the slot content is unchanged. */ |
Gilles Peskine | fa4135b | 2018-12-10 16:48:53 +0100 | [diff] [blame] | 668 | psa_status_t psa_import_key_into_slot( psa_key_slot_t *slot, |
| 669 | const uint8_t *data, |
| 670 | size_t data_length ) |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 671 | { |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 672 | psa_status_t status = PSA_SUCCESS; |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 673 | |
Darryl Green | 940d72c | 2018-07-13 13:18:51 +0100 | [diff] [blame] | 674 | if( key_type_is_raw_bytes( slot->type ) ) |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 675 | { |
Gilles Peskine | 6d91213 | 2018-03-07 16:41:37 +0100 | [diff] [blame] | 676 | /* Ensure that a bytes-to-bit conversion won't overflow. */ |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 677 | if( data_length > SIZE_MAX / 8 ) |
| 678 | return( PSA_ERROR_NOT_SUPPORTED ); |
Darryl Green | 940d72c | 2018-07-13 13:18:51 +0100 | [diff] [blame] | 679 | status = prepare_raw_data_slot( slot->type, |
Gilles Peskine | 0ff4b0f | 2018-06-19 21:31:50 +0200 | [diff] [blame] | 680 | PSA_BYTES_TO_BITS( data_length ), |
| 681 | &slot->data.raw ); |
| 682 | if( status != PSA_SUCCESS ) |
| 683 | return( status ); |
Gilles Peskine | 46f1fd7 | 2018-06-28 19:31:31 +0200 | [diff] [blame] | 684 | if( data_length != 0 ) |
| 685 | memcpy( slot->data.raw.data, data, data_length ); |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 686 | } |
| 687 | else |
Gilles Peskine | f76aa77 | 2018-10-29 19:24:33 +0100 | [diff] [blame] | 688 | #if defined(MBEDTLS_ECP_C) |
Darryl Green | 940d72c | 2018-07-13 13:18:51 +0100 | [diff] [blame] | 689 | if( PSA_KEY_TYPE_IS_ECC_KEYPAIR( slot->type ) ) |
Gilles Peskine | f76aa77 | 2018-10-29 19:24:33 +0100 | [diff] [blame] | 690 | { |
Darryl Green | 940d72c | 2018-07-13 13:18:51 +0100 | [diff] [blame] | 691 | status = psa_import_ec_private_key( PSA_KEY_TYPE_GET_CURVE( slot->type ), |
Gilles Peskine | f76aa77 | 2018-10-29 19:24:33 +0100 | [diff] [blame] | 692 | data, data_length, |
| 693 | &slot->data.ecp ); |
Gilles Peskine | f76aa77 | 2018-10-29 19:24:33 +0100 | [diff] [blame] | 694 | } |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 695 | else if( PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY( slot->type ) ) |
| 696 | { |
| 697 | status = psa_import_ec_public_key( |
| 698 | PSA_KEY_TYPE_GET_CURVE( slot->type ), |
| 699 | data, data_length, |
| 700 | &slot->data.ecp ); |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 701 | } |
Gilles Peskine | f76aa77 | 2018-10-29 19:24:33 +0100 | [diff] [blame] | 702 | else |
| 703 | #endif /* MBEDTLS_ECP_C */ |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 704 | #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PK_PARSE_C) |
| 705 | if( PSA_KEY_TYPE_IS_RSA( slot->type ) ) |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 706 | { |
Jaeden Amero | ec6ff86 | 2019-01-11 17:53:05 +0000 | [diff] [blame] | 707 | status = psa_import_rsa_key( slot->type, |
| 708 | data, data_length, |
| 709 | &slot->data.rsa ); |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 710 | } |
| 711 | else |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 712 | #endif /* defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PK_PARSE_C) */ |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 713 | { |
| 714 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 715 | } |
Jaeden Amero | 08ad327 | 2019-01-14 13:12:39 +0000 | [diff] [blame] | 716 | return( status ); |
Darryl Green | 940d72c | 2018-07-13 13:18:51 +0100 | [diff] [blame] | 717 | } |
| 718 | |
Darryl Green | 06fd18d | 2018-07-16 11:21:11 +0100 | [diff] [blame] | 719 | /* Retrieve an empty key slot (slot with no key data, but possibly |
Jaeden Amero | 283dfd1 | 2019-01-11 12:06:22 +0000 | [diff] [blame] | 720 | * with some metadata such as a policy or domain parameters). */ |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 721 | static psa_status_t psa_get_empty_key_slot( psa_key_handle_t handle, |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 722 | psa_key_slot_t **p_slot ) |
Darryl Green | 06fd18d | 2018-07-16 11:21:11 +0100 | [diff] [blame] | 723 | { |
| 724 | psa_status_t status; |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 725 | psa_key_slot_t *slot = NULL; |
Darryl Green | 06fd18d | 2018-07-16 11:21:11 +0100 | [diff] [blame] | 726 | |
| 727 | *p_slot = NULL; |
| 728 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 729 | status = psa_get_key_slot( handle, &slot ); |
Darryl Green | 06fd18d | 2018-07-16 11:21:11 +0100 | [diff] [blame] | 730 | if( status != PSA_SUCCESS ) |
| 731 | return( status ); |
| 732 | |
| 733 | if( slot->type != PSA_KEY_TYPE_NONE ) |
David Saada | b4ecc27 | 2019-02-14 13:48:10 +0200 | [diff] [blame] | 734 | return( PSA_ERROR_ALREADY_EXISTS ); |
Darryl Green | 06fd18d | 2018-07-16 11:21:11 +0100 | [diff] [blame] | 735 | |
| 736 | *p_slot = slot; |
| 737 | return( status ); |
| 738 | } |
| 739 | |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 740 | /** Calculate the intersection of two algorithm usage policies. |
| 741 | * |
| 742 | * Return 0 (which allows no operation) on incompatibility. |
| 743 | */ |
| 744 | static psa_algorithm_t psa_key_policy_algorithm_intersection( |
| 745 | psa_algorithm_t alg1, |
| 746 | psa_algorithm_t alg2 ) |
| 747 | { |
| 748 | /* Common case: the policy only allows alg. */ |
| 749 | if( alg1 == alg2 ) |
| 750 | return( alg1 ); |
| 751 | /* If the policies are from the same hash-and-sign family, check |
Gilles Peskine | f603c71 | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 752 | * if one is a wildcard. If so the other has the specific algorithm. */ |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 753 | if( PSA_ALG_IS_HASH_AND_SIGN( alg1 ) && |
| 754 | PSA_ALG_IS_HASH_AND_SIGN( alg2 ) && |
| 755 | ( alg1 & ~PSA_ALG_HASH_MASK ) == ( alg2 & ~PSA_ALG_HASH_MASK ) ) |
| 756 | { |
| 757 | if( PSA_ALG_SIGN_GET_HASH( alg1 ) == PSA_ALG_ANY_HASH ) |
| 758 | return( alg2 ); |
Gilles Peskine | f603c71 | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 759 | if( PSA_ALG_SIGN_GET_HASH( alg2 ) == PSA_ALG_ANY_HASH ) |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 760 | return( alg1 ); |
| 761 | } |
| 762 | /* If the policies are incompatible, allow nothing. */ |
| 763 | return( 0 ); |
| 764 | } |
| 765 | |
Gilles Peskine | 30f77cd | 2019-01-14 16:06:39 +0100 | [diff] [blame] | 766 | /** Test whether a policy permits an algorithm. |
| 767 | * |
| 768 | * The caller must test usage flags separately. |
| 769 | */ |
| 770 | static int psa_key_policy_permits( const psa_key_policy_t *policy, |
| 771 | psa_algorithm_t alg ) |
| 772 | { |
| 773 | /* Common case: the policy only allows alg. */ |
| 774 | if( alg == policy->alg ) |
| 775 | return( 1 ); |
| 776 | /* If policy->alg is a hash-and-sign with a wildcard for the hash, |
| 777 | * and alg is the same hash-and-sign family with any hash, |
| 778 | * then alg is compliant with policy->alg. */ |
| 779 | if( PSA_ALG_IS_HASH_AND_SIGN( alg ) && |
| 780 | PSA_ALG_SIGN_GET_HASH( policy->alg ) == PSA_ALG_ANY_HASH ) |
| 781 | { |
| 782 | return( ( policy->alg & ~PSA_ALG_HASH_MASK ) == |
| 783 | ( alg & ~PSA_ALG_HASH_MASK ) ); |
| 784 | } |
| 785 | /* If it isn't permitted, it's forbidden. */ |
| 786 | return( 0 ); |
| 787 | } |
| 788 | |
Gilles Peskine | f603c71 | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 789 | /** Restrict a key policy based on a constraint. |
| 790 | * |
| 791 | * \param[in,out] policy The policy to restrict. |
| 792 | * \param[in] constraint The policy constraint to apply. |
| 793 | * |
| 794 | * \retval #PSA_SUCCESS |
| 795 | * \c *policy contains the intersection of the original value of |
| 796 | * \c *policy and \c *constraint. |
| 797 | * \retval #PSA_ERROR_INVALID_ARGUMENT |
| 798 | * \c *policy and \c *constraint are incompatible. |
| 799 | * \c *policy is unchanged. |
| 800 | */ |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 801 | static psa_status_t psa_restrict_key_policy( |
| 802 | psa_key_policy_t *policy, |
| 803 | const psa_key_policy_t *constraint ) |
| 804 | { |
| 805 | psa_algorithm_t intersection_alg = |
| 806 | psa_key_policy_algorithm_intersection( policy->alg, constraint->alg ); |
| 807 | if( intersection_alg == 0 && policy->alg != 0 && constraint->alg != 0 ) |
| 808 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 809 | policy->usage &= constraint->usage; |
Gilles Peskine | f603c71 | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 810 | policy->alg = intersection_alg; |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 811 | return( PSA_SUCCESS ); |
| 812 | } |
| 813 | |
Darryl Green | 06fd18d | 2018-07-16 11:21:11 +0100 | [diff] [blame] | 814 | /** Retrieve a slot which must contain a key. The key must have allow all the |
| 815 | * usage flags set in \p usage. If \p alg is nonzero, the key must allow |
| 816 | * operations with this algorithm. */ |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 817 | static psa_status_t psa_get_key_from_slot( psa_key_handle_t handle, |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 818 | psa_key_slot_t **p_slot, |
Darryl Green | 06fd18d | 2018-07-16 11:21:11 +0100 | [diff] [blame] | 819 | psa_key_usage_t usage, |
| 820 | psa_algorithm_t alg ) |
| 821 | { |
| 822 | psa_status_t status; |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 823 | psa_key_slot_t *slot = NULL; |
Darryl Green | 06fd18d | 2018-07-16 11:21:11 +0100 | [diff] [blame] | 824 | |
| 825 | *p_slot = NULL; |
| 826 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 827 | status = psa_get_key_slot( handle, &slot ); |
Darryl Green | 06fd18d | 2018-07-16 11:21:11 +0100 | [diff] [blame] | 828 | if( status != PSA_SUCCESS ) |
| 829 | return( status ); |
| 830 | if( slot->type == PSA_KEY_TYPE_NONE ) |
David Saada | b4ecc27 | 2019-02-14 13:48:10 +0200 | [diff] [blame] | 831 | return( PSA_ERROR_DOES_NOT_EXIST ); |
Darryl Green | 06fd18d | 2018-07-16 11:21:11 +0100 | [diff] [blame] | 832 | |
| 833 | /* Enforce that usage policy for the key slot contains all the flags |
| 834 | * required by the usage parameter. There is one exception: public |
| 835 | * keys can always be exported, so we treat public key objects as |
| 836 | * if they had the export flag. */ |
| 837 | if( PSA_KEY_TYPE_IS_PUBLIC_KEY( slot->type ) ) |
| 838 | usage &= ~PSA_KEY_USAGE_EXPORT; |
| 839 | if( ( slot->policy.usage & usage ) != usage ) |
| 840 | return( PSA_ERROR_NOT_PERMITTED ); |
Gilles Peskine | 30f77cd | 2019-01-14 16:06:39 +0100 | [diff] [blame] | 841 | |
| 842 | /* Enforce that the usage policy permits the requested algortihm. */ |
| 843 | if( alg != 0 && ! psa_key_policy_permits( &slot->policy, alg ) ) |
Darryl Green | 06fd18d | 2018-07-16 11:21:11 +0100 | [diff] [blame] | 844 | return( PSA_ERROR_NOT_PERMITTED ); |
| 845 | |
| 846 | *p_slot = slot; |
| 847 | return( PSA_SUCCESS ); |
| 848 | } |
Darryl Green | 940d72c | 2018-07-13 13:18:51 +0100 | [diff] [blame] | 849 | |
Gilles Peskine | f77ed1f | 2018-12-03 11:58:46 +0100 | [diff] [blame] | 850 | /** Wipe key data from a slot. Preserve metadata such as the policy. */ |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 851 | static psa_status_t psa_remove_key_data_from_memory( psa_key_slot_t *slot ) |
Darryl Green | 40225ba | 2018-11-15 14:48:15 +0000 | [diff] [blame] | 852 | { |
| 853 | if( slot->type == PSA_KEY_TYPE_NONE ) |
| 854 | { |
| 855 | /* No key material to clean. */ |
| 856 | } |
| 857 | else if( key_type_is_raw_bytes( slot->type ) ) |
| 858 | { |
| 859 | mbedtls_free( slot->data.raw.data ); |
| 860 | } |
| 861 | else |
| 862 | #if defined(MBEDTLS_RSA_C) |
| 863 | if( PSA_KEY_TYPE_IS_RSA( slot->type ) ) |
| 864 | { |
| 865 | mbedtls_rsa_free( slot->data.rsa ); |
| 866 | mbedtls_free( slot->data.rsa ); |
| 867 | } |
| 868 | else |
| 869 | #endif /* defined(MBEDTLS_RSA_C) */ |
| 870 | #if defined(MBEDTLS_ECP_C) |
| 871 | if( PSA_KEY_TYPE_IS_ECC( slot->type ) ) |
| 872 | { |
| 873 | mbedtls_ecp_keypair_free( slot->data.ecp ); |
| 874 | mbedtls_free( slot->data.ecp ); |
| 875 | } |
| 876 | else |
| 877 | #endif /* defined(MBEDTLS_ECP_C) */ |
| 878 | { |
| 879 | /* Shouldn't happen: the key type is not any type that we |
| 880 | * put in. */ |
| 881 | return( PSA_ERROR_TAMPERING_DETECTED ); |
| 882 | } |
| 883 | |
| 884 | return( PSA_SUCCESS ); |
| 885 | } |
| 886 | |
Gilles Peskine | 5f25dd0 | 2019-01-14 18:24:53 +0100 | [diff] [blame] | 887 | static void psa_abort_operations_using_key( psa_key_slot_t *slot ) |
| 888 | { |
Gilles Peskine | c88644d | 2019-04-12 15:03:38 +0200 | [diff] [blame] | 889 | /*FIXME how to implement this?*/ |
Gilles Peskine | 5f25dd0 | 2019-01-14 18:24:53 +0100 | [diff] [blame] | 890 | (void) slot; |
| 891 | } |
| 892 | |
Gilles Peskine | f77ed1f | 2018-12-03 11:58:46 +0100 | [diff] [blame] | 893 | /** Completely wipe a slot in memory, including its policy. |
| 894 | * Persistent storage is not affected. */ |
Gilles Peskine | 66fb126 | 2018-12-10 16:29:04 +0100 | [diff] [blame] | 895 | psa_status_t psa_wipe_key_slot( psa_key_slot_t *slot ) |
Gilles Peskine | f77ed1f | 2018-12-03 11:58:46 +0100 | [diff] [blame] | 896 | { |
| 897 | psa_status_t status = psa_remove_key_data_from_memory( slot ); |
Gilles Peskine | 5f25dd0 | 2019-01-14 18:24:53 +0100 | [diff] [blame] | 898 | psa_abort_operations_using_key( slot ); |
Gilles Peskine | f77ed1f | 2018-12-03 11:58:46 +0100 | [diff] [blame] | 899 | /* At this point, key material and other type-specific content has |
| 900 | * been wiped. Clear remaining metadata. We can call memset and not |
| 901 | * zeroize because the metadata is not particularly sensitive. */ |
| 902 | memset( slot, 0, sizeof( *slot ) ); |
| 903 | return( status ); |
| 904 | } |
| 905 | |
Gilles Peskine | 87a5e56 | 2019-04-17 12:28:25 +0200 | [diff] [blame] | 906 | psa_status_t psa_import_key_to_handle( psa_key_handle_t handle, |
Darryl Green | 940d72c | 2018-07-13 13:18:51 +0100 | [diff] [blame] | 907 | psa_key_type_t type, |
| 908 | const uint8_t *data, |
| 909 | size_t data_length ) |
| 910 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 911 | psa_key_slot_t *slot; |
Darryl Green | 940d72c | 2018-07-13 13:18:51 +0100 | [diff] [blame] | 912 | psa_status_t status; |
| 913 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 914 | status = psa_get_empty_key_slot( handle, &slot ); |
Darryl Green | 940d72c | 2018-07-13 13:18:51 +0100 | [diff] [blame] | 915 | if( status != PSA_SUCCESS ) |
| 916 | return( status ); |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 917 | |
| 918 | slot->type = type; |
Darryl Green | 940d72c | 2018-07-13 13:18:51 +0100 | [diff] [blame] | 919 | |
| 920 | status = psa_import_key_into_slot( slot, data, data_length ); |
| 921 | if( status != PSA_SUCCESS ) |
| 922 | { |
| 923 | slot->type = PSA_KEY_TYPE_NONE; |
| 924 | return( status ); |
| 925 | } |
| 926 | |
Darryl Green | d49a499 | 2018-06-18 17:27:26 +0100 | [diff] [blame] | 927 | #if defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) |
| 928 | if( slot->lifetime == PSA_KEY_LIFETIME_PERSISTENT ) |
| 929 | { |
| 930 | /* Store in file location */ |
Gilles Peskine | 69f976b | 2018-11-30 18:46:56 +0100 | [diff] [blame] | 931 | status = psa_save_persistent_key( slot->persistent_storage_id, |
| 932 | slot->type, &slot->policy, data, |
Darryl Green | d49a499 | 2018-06-18 17:27:26 +0100 | [diff] [blame] | 933 | data_length ); |
| 934 | if( status != PSA_SUCCESS ) |
| 935 | { |
| 936 | (void) psa_remove_key_data_from_memory( slot ); |
| 937 | slot->type = PSA_KEY_TYPE_NONE; |
| 938 | } |
| 939 | } |
| 940 | #endif /* defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) */ |
| 941 | |
| 942 | return( status ); |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 943 | } |
| 944 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 945 | psa_status_t psa_destroy_key( psa_key_handle_t handle ) |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 946 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 947 | psa_key_slot_t *slot; |
Darryl Green | d49a499 | 2018-06-18 17:27:26 +0100 | [diff] [blame] | 948 | psa_status_t status = PSA_SUCCESS; |
| 949 | psa_status_t storage_status = PSA_SUCCESS; |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 950 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 951 | status = psa_get_key_slot( handle, &slot ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 952 | if( status != PSA_SUCCESS ) |
| 953 | return( status ); |
Darryl Green | d49a499 | 2018-06-18 17:27:26 +0100 | [diff] [blame] | 954 | #if defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) |
| 955 | if( slot->lifetime == PSA_KEY_LIFETIME_PERSISTENT ) |
| 956 | { |
Gilles Peskine | 69f976b | 2018-11-30 18:46:56 +0100 | [diff] [blame] | 957 | storage_status = |
| 958 | psa_destroy_persistent_key( slot->persistent_storage_id ); |
Darryl Green | d49a499 | 2018-06-18 17:27:26 +0100 | [diff] [blame] | 959 | } |
| 960 | #endif /* defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) */ |
Gilles Peskine | f77ed1f | 2018-12-03 11:58:46 +0100 | [diff] [blame] | 961 | status = psa_wipe_key_slot( slot ); |
Darryl Green | d49a499 | 2018-06-18 17:27:26 +0100 | [diff] [blame] | 962 | if( status != PSA_SUCCESS ) |
| 963 | return( status ); |
| 964 | return( storage_status ); |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 965 | } |
| 966 | |
Gilles Peskine | b870b18 | 2018-07-06 16:02:09 +0200 | [diff] [blame] | 967 | /* Return the size of the key in the given slot, in bits. */ |
Gilles Peskine | db4b3ab | 2019-04-18 12:53:01 +0200 | [diff] [blame] | 968 | static size_t psa_get_key_slot_bits( const psa_key_slot_t *slot ) |
Gilles Peskine | b870b18 | 2018-07-06 16:02:09 +0200 | [diff] [blame] | 969 | { |
| 970 | if( key_type_is_raw_bytes( slot->type ) ) |
| 971 | return( slot->data.raw.bytes * 8 ); |
| 972 | #if defined(MBEDTLS_RSA_C) |
Gilles Peskine | d8008d6 | 2018-06-29 19:51:51 +0200 | [diff] [blame] | 973 | if( PSA_KEY_TYPE_IS_RSA( slot->type ) ) |
Gilles Peskine | aac64a2 | 2018-11-12 18:37:42 +0100 | [diff] [blame] | 974 | return( PSA_BYTES_TO_BITS( mbedtls_rsa_get_len( slot->data.rsa ) ) ); |
Gilles Peskine | b870b18 | 2018-07-06 16:02:09 +0200 | [diff] [blame] | 975 | #endif /* defined(MBEDTLS_RSA_C) */ |
| 976 | #if defined(MBEDTLS_ECP_C) |
| 977 | if( PSA_KEY_TYPE_IS_ECC( slot->type ) ) |
| 978 | return( slot->data.ecp->grp.pbits ); |
| 979 | #endif /* defined(MBEDTLS_ECP_C) */ |
| 980 | /* Shouldn't happen except on an empty slot. */ |
| 981 | return( 0 ); |
| 982 | } |
| 983 | |
Gilles Peskine | 8c8f2ab | 2019-04-18 21:44:46 +0200 | [diff] [blame] | 984 | void psa_reset_key_attributes( psa_key_attributes_t *attributes ) |
| 985 | { |
Gilles Peskine | b699f07 | 2019-04-26 16:06:02 +0200 | [diff] [blame] | 986 | mbedtls_free( attributes->domain_parameters ); |
Gilles Peskine | 8c8f2ab | 2019-04-18 21:44:46 +0200 | [diff] [blame] | 987 | memset( attributes, 0, sizeof( *attributes ) ); |
| 988 | } |
| 989 | |
Gilles Peskine | b699f07 | 2019-04-26 16:06:02 +0200 | [diff] [blame] | 990 | psa_status_t psa_set_key_domain_parameters( psa_key_attributes_t *attributes, |
| 991 | psa_key_type_t type, |
| 992 | const uint8_t *data, |
| 993 | size_t data_length ) |
| 994 | { |
| 995 | uint8_t *copy = NULL; |
| 996 | |
| 997 | if( data_length != 0 ) |
| 998 | { |
| 999 | copy = mbedtls_calloc( 1, data_length ); |
| 1000 | if( copy == NULL ) |
| 1001 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 1002 | memcpy( copy, data, data_length ); |
| 1003 | } |
| 1004 | /* After this point, this function is guaranteed to succeed, so it |
| 1005 | * can start modifying `*attributes`. */ |
| 1006 | |
| 1007 | if( attributes->domain_parameters != NULL ) |
| 1008 | { |
| 1009 | mbedtls_free( attributes->domain_parameters ); |
| 1010 | attributes->domain_parameters = NULL; |
| 1011 | attributes->domain_parameters_size = 0; |
| 1012 | } |
| 1013 | |
| 1014 | attributes->domain_parameters = copy; |
| 1015 | attributes->domain_parameters_size = data_length; |
| 1016 | attributes->type = type; |
| 1017 | return( PSA_SUCCESS ); |
| 1018 | } |
| 1019 | |
| 1020 | psa_status_t psa_get_key_domain_parameters( |
| 1021 | const psa_key_attributes_t *attributes, |
| 1022 | uint8_t *data, size_t data_size, size_t *data_length ) |
| 1023 | { |
| 1024 | if( attributes->domain_parameters_size > data_size ) |
| 1025 | return( PSA_ERROR_BUFFER_TOO_SMALL ); |
| 1026 | *data_length = attributes->domain_parameters_size; |
| 1027 | if( attributes->domain_parameters_size != 0 ) |
| 1028 | memcpy( data, attributes->domain_parameters, |
| 1029 | attributes->domain_parameters_size ); |
| 1030 | return( PSA_SUCCESS ); |
| 1031 | } |
| 1032 | |
| 1033 | #if defined(MBEDTLS_RSA_C) |
| 1034 | static psa_status_t psa_get_rsa_public_exponent( |
| 1035 | const mbedtls_rsa_context *rsa, |
| 1036 | psa_key_attributes_t *attributes ) |
| 1037 | { |
| 1038 | mbedtls_mpi mpi; |
| 1039 | int ret; |
| 1040 | uint8_t *buffer = NULL; |
| 1041 | size_t buflen; |
| 1042 | mbedtls_mpi_init( &mpi ); |
| 1043 | |
| 1044 | ret = mbedtls_rsa_export( rsa, NULL, NULL, NULL, NULL, &mpi ); |
| 1045 | if( ret != 0 ) |
| 1046 | goto exit; |
Gilles Peskine | 772c8b1 | 2019-04-26 17:37:21 +0200 | [diff] [blame] | 1047 | if( mbedtls_mpi_cmp_int( &mpi, 65537 ) == 0 ) |
| 1048 | { |
| 1049 | /* It's the default value, which is reported as an empty string, |
| 1050 | * so there's nothing to do. */ |
| 1051 | goto exit; |
| 1052 | } |
Gilles Peskine | b699f07 | 2019-04-26 16:06:02 +0200 | [diff] [blame] | 1053 | |
| 1054 | buflen = mbedtls_mpi_size( &mpi ); |
| 1055 | buffer = mbedtls_calloc( 1, buflen ); |
| 1056 | if( buffer == NULL ) |
| 1057 | { |
| 1058 | ret = MBEDTLS_ERR_MPI_ALLOC_FAILED; |
| 1059 | goto exit; |
| 1060 | } |
| 1061 | ret = mbedtls_mpi_write_binary( &mpi, buffer, buflen ); |
| 1062 | if( ret != 0 ) |
| 1063 | goto exit; |
| 1064 | attributes->domain_parameters = buffer; |
| 1065 | attributes->domain_parameters_size = buflen; |
| 1066 | |
| 1067 | exit: |
| 1068 | mbedtls_mpi_free( &mpi ); |
| 1069 | if( ret != 0 ) |
| 1070 | mbedtls_free( buffer ); |
| 1071 | return( mbedtls_to_psa_error( ret ) ); |
| 1072 | } |
| 1073 | #endif /* MBEDTLS_RSA_C */ |
| 1074 | |
Gilles Peskine | 8c8f2ab | 2019-04-18 21:44:46 +0200 | [diff] [blame] | 1075 | psa_status_t psa_get_key_attributes( psa_key_handle_t handle, |
| 1076 | psa_key_attributes_t *attributes ) |
| 1077 | { |
| 1078 | psa_key_slot_t *slot; |
| 1079 | psa_status_t status; |
| 1080 | |
| 1081 | psa_reset_key_attributes( attributes ); |
| 1082 | |
| 1083 | status = psa_get_key_slot( handle, &slot ); |
| 1084 | if( status != PSA_SUCCESS ) |
| 1085 | return( status ); |
| 1086 | |
| 1087 | attributes->id = slot->persistent_storage_id; |
| 1088 | attributes->lifetime = slot->lifetime; |
| 1089 | attributes->policy = slot->policy; |
| 1090 | attributes->type = slot->type; |
| 1091 | attributes->bits = psa_get_key_slot_bits( slot ); |
Gilles Peskine | b699f07 | 2019-04-26 16:06:02 +0200 | [diff] [blame] | 1092 | |
| 1093 | switch( slot->type ) |
| 1094 | { |
| 1095 | #if defined(MBEDTLS_RSA_C) |
| 1096 | case PSA_KEY_TYPE_RSA_KEYPAIR: |
| 1097 | case PSA_KEY_TYPE_RSA_PUBLIC_KEY: |
| 1098 | status = psa_get_rsa_public_exponent( slot->data.rsa, attributes ); |
| 1099 | break; |
| 1100 | #endif |
| 1101 | default: |
| 1102 | /* Nothing else to do. */ |
| 1103 | break; |
| 1104 | } |
| 1105 | |
| 1106 | if( status != PSA_SUCCESS ) |
| 1107 | psa_reset_key_attributes( attributes ); |
| 1108 | return( status ); |
Gilles Peskine | 8c8f2ab | 2019-04-18 21:44:46 +0200 | [diff] [blame] | 1109 | } |
| 1110 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 1111 | psa_status_t psa_get_key_information( psa_key_handle_t handle, |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 1112 | psa_key_type_t *type, |
| 1113 | size_t *bits ) |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1114 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 1115 | psa_key_slot_t *slot; |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 1116 | psa_status_t status; |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1117 | |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1118 | if( type != NULL ) |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 1119 | *type = 0; |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1120 | if( bits != NULL ) |
| 1121 | *bits = 0; |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 1122 | status = psa_get_key_slot( handle, &slot ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 1123 | if( status != PSA_SUCCESS ) |
| 1124 | return( status ); |
Gilles Peskine | b870b18 | 2018-07-06 16:02:09 +0200 | [diff] [blame] | 1125 | |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1126 | if( slot->type == PSA_KEY_TYPE_NONE ) |
David Saada | b4ecc27 | 2019-02-14 13:48:10 +0200 | [diff] [blame] | 1127 | return( PSA_ERROR_DOES_NOT_EXIST ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 1128 | if( type != NULL ) |
| 1129 | *type = slot->type; |
Gilles Peskine | b870b18 | 2018-07-06 16:02:09 +0200 | [diff] [blame] | 1130 | if( bits != NULL ) |
Gilles Peskine | db4b3ab | 2019-04-18 12:53:01 +0200 | [diff] [blame] | 1131 | *bits = psa_get_key_slot_bits( slot ); |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1132 | return( PSA_SUCCESS ); |
| 1133 | } |
| 1134 | |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 1135 | #if defined(MBEDTLS_RSA_C) || defined(MBEDTLS_ECP_C) |
Jaeden Amero | 6b19600 | 2019-01-10 10:23:21 +0000 | [diff] [blame] | 1136 | static int pk_write_pubkey_simple( mbedtls_pk_context *key, |
| 1137 | unsigned char *buf, size_t size ) |
| 1138 | { |
| 1139 | int ret; |
| 1140 | unsigned char *c; |
| 1141 | size_t len = 0; |
| 1142 | |
| 1143 | c = buf + size; |
| 1144 | |
| 1145 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_pk_write_pubkey( &c, buf, key ) ); |
| 1146 | |
| 1147 | return( (int) len ); |
| 1148 | } |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 1149 | #endif /* defined(MBEDTLS_RSA_C) || defined(MBEDTLS_ECP_C) */ |
Jaeden Amero | 6b19600 | 2019-01-10 10:23:21 +0000 | [diff] [blame] | 1150 | |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 1151 | static psa_status_t psa_internal_export_key( const psa_key_slot_t *slot, |
| 1152 | uint8_t *data, |
| 1153 | size_t data_size, |
| 1154 | size_t *data_length, |
| 1155 | int export_public_key ) |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1156 | { |
Jaeden Amero | f24c7f8 | 2018-06-27 17:20:43 +0100 | [diff] [blame] | 1157 | *data_length = 0; |
| 1158 | |
Gilles Peskine | c1bb6c8 | 2018-06-18 16:04:39 +0200 | [diff] [blame] | 1159 | if( export_public_key && ! PSA_KEY_TYPE_IS_ASYMMETRIC( slot->type ) ) |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1160 | return( PSA_ERROR_INVALID_ARGUMENT ); |
mohammad1603 | 06e7920 | 2018-03-28 13:17:44 +0300 | [diff] [blame] | 1161 | |
Gilles Peskine | 48c0ea1 | 2018-06-21 14:15:31 +0200 | [diff] [blame] | 1162 | if( key_type_is_raw_bytes( slot->type ) ) |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1163 | { |
| 1164 | if( slot->data.raw.bytes > data_size ) |
| 1165 | return( PSA_ERROR_BUFFER_TOO_SMALL ); |
Gilles Peskine | 52b9018 | 2018-10-29 19:26:27 +0100 | [diff] [blame] | 1166 | if( data_size != 0 ) |
| 1167 | { |
Gilles Peskine | 46f1fd7 | 2018-06-28 19:31:31 +0200 | [diff] [blame] | 1168 | memcpy( data, slot->data.raw.data, slot->data.raw.bytes ); |
Gilles Peskine | 52b9018 | 2018-10-29 19:26:27 +0100 | [diff] [blame] | 1169 | memset( data + slot->data.raw.bytes, 0, |
| 1170 | data_size - slot->data.raw.bytes ); |
| 1171 | } |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1172 | *data_length = slot->data.raw.bytes; |
| 1173 | return( PSA_SUCCESS ); |
| 1174 | } |
Gilles Peskine | 188c71e | 2018-10-29 19:26:02 +0100 | [diff] [blame] | 1175 | #if defined(MBEDTLS_ECP_C) |
| 1176 | if( PSA_KEY_TYPE_IS_ECC_KEYPAIR( slot->type ) && !export_public_key ) |
| 1177 | { |
Darryl Green | dd8fb77 | 2018-11-07 16:00:44 +0000 | [diff] [blame] | 1178 | psa_status_t status; |
| 1179 | |
Gilles Peskine | db4b3ab | 2019-04-18 12:53:01 +0200 | [diff] [blame] | 1180 | size_t bytes = PSA_BITS_TO_BYTES( psa_get_key_slot_bits( slot ) ); |
Gilles Peskine | 188c71e | 2018-10-29 19:26:02 +0100 | [diff] [blame] | 1181 | if( bytes > data_size ) |
| 1182 | return( PSA_ERROR_BUFFER_TOO_SMALL ); |
| 1183 | status = mbedtls_to_psa_error( |
| 1184 | mbedtls_mpi_write_binary( &slot->data.ecp->d, data, bytes ) ); |
| 1185 | if( status != PSA_SUCCESS ) |
| 1186 | return( status ); |
| 1187 | memset( data + bytes, 0, data_size - bytes ); |
| 1188 | *data_length = bytes; |
| 1189 | return( PSA_SUCCESS ); |
| 1190 | } |
| 1191 | #endif |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1192 | else |
Moran Peker | 17e36e1 | 2018-05-02 12:55:20 +0300 | [diff] [blame] | 1193 | { |
Gilles Peskine | 969ac72 | 2018-01-28 18:16:59 +0100 | [diff] [blame] | 1194 | #if defined(MBEDTLS_PK_WRITE_C) |
Gilles Peskine | d8008d6 | 2018-06-29 19:51:51 +0200 | [diff] [blame] | 1195 | if( PSA_KEY_TYPE_IS_RSA( slot->type ) || |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1196 | PSA_KEY_TYPE_IS_ECC( slot->type ) ) |
Gilles Peskine | 969ac72 | 2018-01-28 18:16:59 +0100 | [diff] [blame] | 1197 | { |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1198 | mbedtls_pk_context pk; |
| 1199 | int ret; |
Gilles Peskine | d8008d6 | 2018-06-29 19:51:51 +0200 | [diff] [blame] | 1200 | if( PSA_KEY_TYPE_IS_RSA( slot->type ) ) |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1201 | { |
Darryl Green | 9e2d7a0 | 2018-07-24 16:33:30 +0100 | [diff] [blame] | 1202 | #if defined(MBEDTLS_RSA_C) |
| 1203 | mbedtls_pk_init( &pk ); |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1204 | pk.pk_info = &mbedtls_rsa_info; |
| 1205 | pk.pk_ctx = slot->data.rsa; |
Darryl Green | 9e2d7a0 | 2018-07-24 16:33:30 +0100 | [diff] [blame] | 1206 | #else |
| 1207 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 1208 | #endif |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1209 | } |
| 1210 | else |
| 1211 | { |
Darryl Green | 9e2d7a0 | 2018-07-24 16:33:30 +0100 | [diff] [blame] | 1212 | #if defined(MBEDTLS_ECP_C) |
| 1213 | mbedtls_pk_init( &pk ); |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1214 | pk.pk_info = &mbedtls_eckey_info; |
| 1215 | pk.pk_ctx = slot->data.ecp; |
Darryl Green | 9e2d7a0 | 2018-07-24 16:33:30 +0100 | [diff] [blame] | 1216 | #else |
| 1217 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 1218 | #endif |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1219 | } |
Moran Peker | d732659 | 2018-05-29 16:56:39 +0300 | [diff] [blame] | 1220 | if( export_public_key || PSA_KEY_TYPE_IS_PUBLIC_KEY( slot->type ) ) |
Jaeden Amero | 6b19600 | 2019-01-10 10:23:21 +0000 | [diff] [blame] | 1221 | { |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 1222 | ret = pk_write_pubkey_simple( &pk, data, data_size ); |
Jaeden Amero | 6b19600 | 2019-01-10 10:23:21 +0000 | [diff] [blame] | 1223 | } |
Moran Peker | 17e36e1 | 2018-05-02 12:55:20 +0300 | [diff] [blame] | 1224 | else |
Jaeden Amero | 6b19600 | 2019-01-10 10:23:21 +0000 | [diff] [blame] | 1225 | { |
Moran Peker | 17e36e1 | 2018-05-02 12:55:20 +0300 | [diff] [blame] | 1226 | ret = mbedtls_pk_write_key_der( &pk, data, data_size ); |
Jaeden Amero | 6b19600 | 2019-01-10 10:23:21 +0000 | [diff] [blame] | 1227 | } |
Moran Peker | 6036432 | 2018-04-29 11:34:58 +0300 | [diff] [blame] | 1228 | if( ret < 0 ) |
Gilles Peskine | e66ca3b | 2018-06-20 00:11:45 +0200 | [diff] [blame] | 1229 | { |
Gilles Peskine | 46f1fd7 | 2018-06-28 19:31:31 +0200 | [diff] [blame] | 1230 | /* If data_size is 0 then data may be NULL and then the |
| 1231 | * call to memset would have undefined behavior. */ |
| 1232 | if( data_size != 0 ) |
| 1233 | memset( data, 0, data_size ); |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1234 | return( mbedtls_to_psa_error( ret ) ); |
Gilles Peskine | e66ca3b | 2018-06-20 00:11:45 +0200 | [diff] [blame] | 1235 | } |
Gilles Peskine | 0e23158 | 2018-06-20 00:11:07 +0200 | [diff] [blame] | 1236 | /* The mbedtls_pk_xxx functions write to the end of the buffer. |
| 1237 | * Move the data to the beginning and erase remaining data |
| 1238 | * at the original location. */ |
| 1239 | if( 2 * (size_t) ret <= data_size ) |
| 1240 | { |
| 1241 | memcpy( data, data + data_size - ret, ret ); |
Gilles Peskine | e66ca3b | 2018-06-20 00:11:45 +0200 | [diff] [blame] | 1242 | memset( data + data_size - ret, 0, ret ); |
Gilles Peskine | 0e23158 | 2018-06-20 00:11:07 +0200 | [diff] [blame] | 1243 | } |
| 1244 | else if( (size_t) ret < data_size ) |
| 1245 | { |
| 1246 | memmove( data, data + data_size - ret, ret ); |
Gilles Peskine | e66ca3b | 2018-06-20 00:11:45 +0200 | [diff] [blame] | 1247 | memset( data + ret, 0, data_size - ret ); |
Gilles Peskine | 0e23158 | 2018-06-20 00:11:07 +0200 | [diff] [blame] | 1248 | } |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1249 | *data_length = ret; |
| 1250 | return( PSA_SUCCESS ); |
Gilles Peskine | 969ac72 | 2018-01-28 18:16:59 +0100 | [diff] [blame] | 1251 | } |
| 1252 | else |
Gilles Peskine | 6d91213 | 2018-03-07 16:41:37 +0100 | [diff] [blame] | 1253 | #endif /* defined(MBEDTLS_PK_WRITE_C) */ |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1254 | { |
| 1255 | /* This shouldn't happen in the reference implementation, but |
Gilles Peskine | 785fd55 | 2018-06-04 15:08:56 +0200 | [diff] [blame] | 1256 | it is valid for a special-purpose implementation to omit |
| 1257 | support for exporting certain key types. */ |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1258 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 1259 | } |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1260 | } |
| 1261 | } |
| 1262 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 1263 | psa_status_t psa_export_key( psa_key_handle_t handle, |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 1264 | uint8_t *data, |
| 1265 | size_t data_size, |
| 1266 | size_t *data_length ) |
Moran Peker | a998bc6 | 2018-04-16 18:16:20 +0300 | [diff] [blame] | 1267 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 1268 | psa_key_slot_t *slot; |
Darryl Green | dd8fb77 | 2018-11-07 16:00:44 +0000 | [diff] [blame] | 1269 | psa_status_t status; |
| 1270 | |
| 1271 | /* Set the key to empty now, so that even when there are errors, we always |
| 1272 | * set data_length to a value between 0 and data_size. On error, setting |
| 1273 | * the key to empty is a good choice because an empty key representation is |
| 1274 | * unlikely to be accepted anywhere. */ |
| 1275 | *data_length = 0; |
| 1276 | |
| 1277 | /* Export requires the EXPORT flag. There is an exception for public keys, |
| 1278 | * which don't require any flag, but psa_get_key_from_slot takes |
| 1279 | * care of this. */ |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 1280 | status = psa_get_key_from_slot( handle, &slot, PSA_KEY_USAGE_EXPORT, 0 ); |
Darryl Green | dd8fb77 | 2018-11-07 16:00:44 +0000 | [diff] [blame] | 1281 | if( status != PSA_SUCCESS ) |
| 1282 | return( status ); |
| 1283 | return( psa_internal_export_key( slot, data, data_size, |
Gilles Peskine | c1bb6c8 | 2018-06-18 16:04:39 +0200 | [diff] [blame] | 1284 | data_length, 0 ) ); |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1285 | } |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1286 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 1287 | psa_status_t psa_export_public_key( psa_key_handle_t handle, |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 1288 | uint8_t *data, |
| 1289 | size_t data_size, |
| 1290 | size_t *data_length ) |
Moran Peker | dd4ea38 | 2018-04-03 15:30:03 +0300 | [diff] [blame] | 1291 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 1292 | psa_key_slot_t *slot; |
Darryl Green | dd8fb77 | 2018-11-07 16:00:44 +0000 | [diff] [blame] | 1293 | psa_status_t status; |
| 1294 | |
| 1295 | /* Set the key to empty now, so that even when there are errors, we always |
| 1296 | * set data_length to a value between 0 and data_size. On error, setting |
| 1297 | * the key to empty is a good choice because an empty key representation is |
| 1298 | * unlikely to be accepted anywhere. */ |
| 1299 | *data_length = 0; |
| 1300 | |
| 1301 | /* Exporting a public key doesn't require a usage flag. */ |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 1302 | status = psa_get_key_from_slot( handle, &slot, 0, 0 ); |
Darryl Green | dd8fb77 | 2018-11-07 16:00:44 +0000 | [diff] [blame] | 1303 | if( status != PSA_SUCCESS ) |
| 1304 | return( status ); |
| 1305 | return( psa_internal_export_key( slot, data, data_size, |
Gilles Peskine | c1bb6c8 | 2018-06-18 16:04:39 +0200 | [diff] [blame] | 1306 | data_length, 1 ) ); |
Moran Peker | dd4ea38 | 2018-04-03 15:30:03 +0300 | [diff] [blame] | 1307 | } |
| 1308 | |
Darryl Green | 0c6575a | 2018-11-07 16:05:30 +0000 | [diff] [blame] | 1309 | #if defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 1310 | static psa_status_t psa_save_generated_persistent_key( psa_key_slot_t *slot, |
Darryl Green | 0c6575a | 2018-11-07 16:05:30 +0000 | [diff] [blame] | 1311 | size_t bits ) |
| 1312 | { |
| 1313 | psa_status_t status; |
| 1314 | uint8_t *data; |
| 1315 | size_t key_length; |
| 1316 | size_t data_size = PSA_KEY_EXPORT_MAX_SIZE( slot->type, bits ); |
| 1317 | data = mbedtls_calloc( 1, data_size ); |
itayzafrir | 910c76b | 2018-11-21 16:03:21 +0200 | [diff] [blame] | 1318 | if( data == NULL ) |
| 1319 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
Darryl Green | 0c6575a | 2018-11-07 16:05:30 +0000 | [diff] [blame] | 1320 | /* Get key data in export format */ |
| 1321 | status = psa_internal_export_key( slot, data, data_size, &key_length, 0 ); |
| 1322 | if( status != PSA_SUCCESS ) |
| 1323 | { |
| 1324 | slot->type = PSA_KEY_TYPE_NONE; |
| 1325 | goto exit; |
| 1326 | } |
| 1327 | /* Store in file location */ |
Gilles Peskine | 69f976b | 2018-11-30 18:46:56 +0100 | [diff] [blame] | 1328 | status = psa_save_persistent_key( slot->persistent_storage_id, |
| 1329 | slot->type, &slot->policy, |
Darryl Green | 0c6575a | 2018-11-07 16:05:30 +0000 | [diff] [blame] | 1330 | data, key_length ); |
| 1331 | if( status != PSA_SUCCESS ) |
| 1332 | { |
| 1333 | slot->type = PSA_KEY_TYPE_NONE; |
| 1334 | } |
| 1335 | exit: |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 1336 | mbedtls_platform_zeroize( data, key_length ); |
Darryl Green | 0c6575a | 2018-11-07 16:05:30 +0000 | [diff] [blame] | 1337 | mbedtls_free( data ); |
| 1338 | return( status ); |
| 1339 | } |
| 1340 | #endif /* defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) */ |
| 1341 | |
Gilles Peskine | 4747d19 | 2019-04-17 15:05:45 +0200 | [diff] [blame] | 1342 | static psa_status_t psa_set_key_policy_internal( |
| 1343 | psa_key_slot_t *slot, |
| 1344 | const psa_key_policy_t *policy ) |
| 1345 | { |
| 1346 | if( ( policy->usage & ~( PSA_KEY_USAGE_EXPORT | |
| 1347 | PSA_KEY_USAGE_ENCRYPT | |
| 1348 | PSA_KEY_USAGE_DECRYPT | |
| 1349 | PSA_KEY_USAGE_SIGN | |
| 1350 | PSA_KEY_USAGE_VERIFY | |
| 1351 | PSA_KEY_USAGE_DERIVE ) ) != 0 ) |
| 1352 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 1353 | |
| 1354 | slot->policy = *policy; |
| 1355 | return( PSA_SUCCESS ); |
| 1356 | } |
| 1357 | |
| 1358 | /** Prepare a key slot to receive key material. |
| 1359 | * |
| 1360 | * This function allocates a key slot and sets its metadata. |
| 1361 | * |
| 1362 | * If this function fails, call psa_fail_key_creation(). |
| 1363 | * |
| 1364 | * \param attributes Key attributes for the new key. |
| 1365 | * \param handle On success, the allocated handle. |
| 1366 | * \param p_slot On success, a pointer to the prepared slot. |
| 1367 | */ |
| 1368 | static psa_status_t psa_start_key_creation( |
| 1369 | const psa_key_attributes_t *attributes, |
| 1370 | psa_key_handle_t *handle, |
| 1371 | psa_key_slot_t **p_slot ) |
| 1372 | { |
| 1373 | psa_status_t status; |
| 1374 | psa_key_slot_t *slot; |
| 1375 | |
| 1376 | status = psa_allocate_key( handle ); |
| 1377 | if( status != PSA_SUCCESS ) |
| 1378 | return( status ); |
| 1379 | status = psa_get_key_slot( *handle, p_slot ); |
| 1380 | if( status != PSA_SUCCESS ) |
| 1381 | return( status ); |
| 1382 | slot = *p_slot; |
| 1383 | |
| 1384 | status = psa_set_key_policy_internal( slot, &attributes->policy ); |
| 1385 | if( status != PSA_SUCCESS ) |
| 1386 | return( status ); |
| 1387 | slot->lifetime = attributes->lifetime; |
| 1388 | if( attributes->lifetime != PSA_KEY_LIFETIME_VOLATILE ) |
Gilles Peskine | d167b94 | 2019-04-19 18:19:40 +0200 | [diff] [blame] | 1389 | { |
| 1390 | status = psa_validate_persistent_key_parameters( attributes->lifetime, |
| 1391 | attributes->id ); |
| 1392 | if( status != PSA_SUCCESS ) |
| 1393 | return( status ); |
Gilles Peskine | 4747d19 | 2019-04-17 15:05:45 +0200 | [diff] [blame] | 1394 | slot->persistent_storage_id = attributes->id; |
Gilles Peskine | d167b94 | 2019-04-19 18:19:40 +0200 | [diff] [blame] | 1395 | } |
Gilles Peskine | 4747d19 | 2019-04-17 15:05:45 +0200 | [diff] [blame] | 1396 | slot->type = attributes->type; |
| 1397 | |
| 1398 | return( status ); |
| 1399 | } |
| 1400 | |
| 1401 | /** Finalize the creation of a key once its key material has been set. |
| 1402 | * |
| 1403 | * This entails writing the key to persistent storage. |
| 1404 | * |
| 1405 | * If this function fails, call psa_fail_key_creation(). |
| 1406 | * |
| 1407 | * \param slot Pointer to the slot with key material. |
| 1408 | */ |
| 1409 | static psa_status_t psa_finish_key_creation( psa_key_slot_t *slot ) |
| 1410 | { |
| 1411 | psa_status_t status = PSA_SUCCESS; |
Gilles Peskine | 30afafd | 2019-04-25 13:47:40 +0200 | [diff] [blame] | 1412 | (void) slot; |
Gilles Peskine | 4747d19 | 2019-04-17 15:05:45 +0200 | [diff] [blame] | 1413 | |
| 1414 | #if defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) |
| 1415 | if( slot->lifetime == PSA_KEY_LIFETIME_PERSISTENT ) |
| 1416 | { |
| 1417 | uint8_t *buffer = NULL; |
| 1418 | size_t buffer_size = 0; |
| 1419 | size_t length; |
| 1420 | |
| 1421 | buffer_size = PSA_KEY_EXPORT_MAX_SIZE( slot->type, |
Gilles Peskine | db4b3ab | 2019-04-18 12:53:01 +0200 | [diff] [blame] | 1422 | psa_get_key_slot_bits( slot ) ); |
Gilles Peskine | 4747d19 | 2019-04-17 15:05:45 +0200 | [diff] [blame] | 1423 | buffer = mbedtls_calloc( 1, buffer_size ); |
| 1424 | if( buffer == NULL && buffer_size != 0 ) |
| 1425 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 1426 | status = psa_internal_export_key( slot, |
| 1427 | buffer, buffer_size, &length, |
| 1428 | 0 ); |
| 1429 | |
| 1430 | if( status == PSA_SUCCESS ) |
| 1431 | { |
| 1432 | status = psa_save_persistent_key( slot->persistent_storage_id, |
| 1433 | slot->type, &slot->policy, |
| 1434 | buffer, length ); |
| 1435 | } |
| 1436 | |
| 1437 | if( buffer_size != 0 ) |
| 1438 | mbedtls_platform_zeroize( buffer, buffer_size ); |
| 1439 | mbedtls_free( buffer ); |
| 1440 | } |
| 1441 | #endif /* defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) */ |
| 1442 | |
| 1443 | return( status ); |
| 1444 | } |
| 1445 | |
| 1446 | /** Abort the creation of a key. |
| 1447 | * |
| 1448 | * You may call this function after calling psa_start_key_creation(), |
| 1449 | * or after psa_finish_key_creation() fails. In other circumstances, this |
| 1450 | * function may not clean up persistent storage. |
| 1451 | * |
| 1452 | * \param slot Pointer to the slot with key material. |
| 1453 | */ |
| 1454 | static void psa_fail_key_creation( psa_key_slot_t *slot ) |
| 1455 | { |
| 1456 | if( slot == NULL ) |
| 1457 | return; |
| 1458 | psa_wipe_key_slot( slot ); |
| 1459 | } |
| 1460 | |
| 1461 | psa_status_t psa_import_key( const psa_key_attributes_t *attributes, |
| 1462 | psa_key_handle_t *handle, |
| 1463 | const uint8_t *data, |
| 1464 | size_t data_length ) |
| 1465 | { |
| 1466 | psa_status_t status; |
| 1467 | psa_key_slot_t *slot = NULL; |
| 1468 | status = psa_start_key_creation( attributes, handle, &slot ); |
| 1469 | if( status == PSA_SUCCESS ) |
| 1470 | { |
| 1471 | status = psa_import_key_into_slot( slot, data, data_length ); |
| 1472 | } |
| 1473 | if( status == PSA_SUCCESS ) |
| 1474 | status = psa_finish_key_creation( slot ); |
| 1475 | if( status != PSA_SUCCESS ) |
| 1476 | { |
| 1477 | psa_fail_key_creation( slot ); |
| 1478 | *handle = 0; |
| 1479 | } |
| 1480 | return( status ); |
| 1481 | } |
| 1482 | |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 1483 | static psa_status_t psa_copy_key_material( const psa_key_slot_t *source, |
Gilles Peskine | 8c8f2ab | 2019-04-18 21:44:46 +0200 | [diff] [blame] | 1484 | psa_key_slot_t *target ) |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 1485 | { |
| 1486 | psa_status_t status; |
| 1487 | uint8_t *buffer = NULL; |
| 1488 | size_t buffer_size = 0; |
| 1489 | size_t length; |
| 1490 | |
| 1491 | buffer_size = PSA_KEY_EXPORT_MAX_SIZE( source->type, |
Gilles Peskine | db4b3ab | 2019-04-18 12:53:01 +0200 | [diff] [blame] | 1492 | psa_get_key_slot_bits( source ) ); |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 1493 | buffer = mbedtls_calloc( 1, buffer_size ); |
Darryl Green | 8593bca | 2019-02-11 11:45:58 +0000 | [diff] [blame] | 1494 | if( buffer == NULL && buffer_size != 0 ) |
Gilles Peskine | 122d002 | 2019-01-23 10:55:43 +0100 | [diff] [blame] | 1495 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 1496 | status = psa_internal_export_key( source, buffer, buffer_size, &length, 0 ); |
| 1497 | if( status != PSA_SUCCESS ) |
| 1498 | goto exit; |
Gilles Peskine | 8c8f2ab | 2019-04-18 21:44:46 +0200 | [diff] [blame] | 1499 | target->type = source->type; |
| 1500 | status = psa_import_key_into_slot( target, buffer, length ); |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 1501 | |
| 1502 | exit: |
Darryl Green | 8096caf | 2019-02-11 14:03:03 +0000 | [diff] [blame] | 1503 | if( buffer_size != 0 ) |
| 1504 | mbedtls_platform_zeroize( buffer, buffer_size ); |
Gilles Peskine | 122d002 | 2019-01-23 10:55:43 +0100 | [diff] [blame] | 1505 | mbedtls_free( buffer ); |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 1506 | return( status ); |
| 1507 | } |
| 1508 | |
Gilles Peskine | 87a5e56 | 2019-04-17 12:28:25 +0200 | [diff] [blame] | 1509 | psa_status_t psa_copy_key_to_handle(psa_key_handle_t source_handle, |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 1510 | psa_key_handle_t target_handle, |
| 1511 | const psa_key_policy_t *constraint) |
| 1512 | { |
| 1513 | psa_key_slot_t *source_slot = NULL; |
| 1514 | psa_key_slot_t *target_slot = NULL; |
| 1515 | psa_key_policy_t new_policy; |
| 1516 | psa_status_t status; |
| 1517 | status = psa_get_key_from_slot( source_handle, &source_slot, 0, 0 ); |
| 1518 | if( status != PSA_SUCCESS ) |
| 1519 | return( status ); |
| 1520 | status = psa_get_empty_key_slot( target_handle, &target_slot ); |
| 1521 | if( status != PSA_SUCCESS ) |
| 1522 | return( status ); |
| 1523 | |
| 1524 | new_policy = target_slot->policy; |
| 1525 | status = psa_restrict_key_policy( &new_policy, &source_slot->policy ); |
| 1526 | if( status != PSA_SUCCESS ) |
| 1527 | return( status ); |
| 1528 | if( constraint != NULL ) |
| 1529 | { |
| 1530 | status = psa_restrict_key_policy( &new_policy, constraint ); |
| 1531 | if( status != PSA_SUCCESS ) |
| 1532 | return( status ); |
| 1533 | } |
| 1534 | |
Gilles Peskine | 8c8f2ab | 2019-04-18 21:44:46 +0200 | [diff] [blame] | 1535 | status = psa_copy_key_material( source_slot, target_slot ); |
Gilles Peskine | 4cb9dde | 2019-01-19 13:40:11 +0100 | [diff] [blame] | 1536 | if( status != PSA_SUCCESS ) |
| 1537 | return( status ); |
| 1538 | |
| 1539 | target_slot->policy = new_policy; |
| 1540 | return( PSA_SUCCESS ); |
| 1541 | } |
| 1542 | |
Gilles Peskine | 8c8f2ab | 2019-04-18 21:44:46 +0200 | [diff] [blame] | 1543 | psa_status_t psa_copy_key( psa_key_handle_t source_handle, |
| 1544 | const psa_key_attributes_t *specified_attributes, |
| 1545 | psa_key_handle_t *target_handle ) |
| 1546 | { |
| 1547 | psa_status_t status; |
| 1548 | psa_key_slot_t *source_slot = NULL; |
| 1549 | psa_key_slot_t *target_slot = NULL; |
| 1550 | psa_key_attributes_t actual_attributes = *specified_attributes; |
| 1551 | |
| 1552 | status = psa_get_key_from_slot( source_handle, &source_slot, 0, 0 ); |
| 1553 | if( status != PSA_SUCCESS ) |
| 1554 | goto exit; |
| 1555 | |
| 1556 | status = psa_restrict_key_policy( &actual_attributes.policy, |
| 1557 | &source_slot->policy ); |
| 1558 | if( status != PSA_SUCCESS ) |
| 1559 | goto exit; |
| 1560 | |
| 1561 | status = psa_start_key_creation( &actual_attributes, |
| 1562 | target_handle, &target_slot ); |
| 1563 | if( status != PSA_SUCCESS ) |
| 1564 | goto exit; |
| 1565 | |
| 1566 | status = psa_copy_key_material( source_slot, target_slot ); |
| 1567 | |
| 1568 | exit: |
| 1569 | if( status == PSA_SUCCESS ) |
| 1570 | status = psa_finish_key_creation( target_slot ); |
| 1571 | if( status != PSA_SUCCESS ) |
| 1572 | { |
| 1573 | psa_fail_key_creation( target_slot ); |
| 1574 | *target_handle = 0; |
| 1575 | } |
| 1576 | return( status ); |
| 1577 | } |
| 1578 | |
Gilles Peskine | 7bcfc0a | 2018-06-18 21:49:39 +0200 | [diff] [blame] | 1579 | |
| 1580 | |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 1581 | /****************************************************************/ |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 1582 | /* Message digests */ |
| 1583 | /****************************************************************/ |
| 1584 | |
Gilles Peskine | dc2fc84 | 2018-03-07 16:42:59 +0100 | [diff] [blame] | 1585 | static const mbedtls_md_info_t *mbedtls_md_info_from_psa( psa_algorithm_t alg ) |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 1586 | { |
| 1587 | switch( alg ) |
| 1588 | { |
| 1589 | #if defined(MBEDTLS_MD2_C) |
| 1590 | case PSA_ALG_MD2: |
| 1591 | return( &mbedtls_md2_info ); |
| 1592 | #endif |
| 1593 | #if defined(MBEDTLS_MD4_C) |
| 1594 | case PSA_ALG_MD4: |
| 1595 | return( &mbedtls_md4_info ); |
| 1596 | #endif |
| 1597 | #if defined(MBEDTLS_MD5_C) |
| 1598 | case PSA_ALG_MD5: |
| 1599 | return( &mbedtls_md5_info ); |
| 1600 | #endif |
| 1601 | #if defined(MBEDTLS_RIPEMD160_C) |
| 1602 | case PSA_ALG_RIPEMD160: |
| 1603 | return( &mbedtls_ripemd160_info ); |
| 1604 | #endif |
| 1605 | #if defined(MBEDTLS_SHA1_C) |
| 1606 | case PSA_ALG_SHA_1: |
| 1607 | return( &mbedtls_sha1_info ); |
| 1608 | #endif |
| 1609 | #if defined(MBEDTLS_SHA256_C) |
| 1610 | case PSA_ALG_SHA_224: |
| 1611 | return( &mbedtls_sha224_info ); |
| 1612 | case PSA_ALG_SHA_256: |
| 1613 | return( &mbedtls_sha256_info ); |
| 1614 | #endif |
| 1615 | #if defined(MBEDTLS_SHA512_C) |
| 1616 | case PSA_ALG_SHA_384: |
| 1617 | return( &mbedtls_sha384_info ); |
| 1618 | case PSA_ALG_SHA_512: |
| 1619 | return( &mbedtls_sha512_info ); |
| 1620 | #endif |
| 1621 | default: |
| 1622 | return( NULL ); |
| 1623 | } |
| 1624 | } |
| 1625 | |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1626 | psa_status_t psa_hash_abort( psa_hash_operation_t *operation ) |
| 1627 | { |
| 1628 | switch( operation->alg ) |
| 1629 | { |
Gilles Peskine | 8173631 | 2018-06-26 15:04:31 +0200 | [diff] [blame] | 1630 | case 0: |
| 1631 | /* The object has (apparently) been initialized but it is not |
| 1632 | * in use. It's ok to call abort on such an object, and there's |
| 1633 | * nothing to do. */ |
| 1634 | break; |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1635 | #if defined(MBEDTLS_MD2_C) |
| 1636 | case PSA_ALG_MD2: |
| 1637 | mbedtls_md2_free( &operation->ctx.md2 ); |
| 1638 | break; |
| 1639 | #endif |
| 1640 | #if defined(MBEDTLS_MD4_C) |
| 1641 | case PSA_ALG_MD4: |
| 1642 | mbedtls_md4_free( &operation->ctx.md4 ); |
| 1643 | break; |
| 1644 | #endif |
| 1645 | #if defined(MBEDTLS_MD5_C) |
| 1646 | case PSA_ALG_MD5: |
| 1647 | mbedtls_md5_free( &operation->ctx.md5 ); |
| 1648 | break; |
| 1649 | #endif |
| 1650 | #if defined(MBEDTLS_RIPEMD160_C) |
| 1651 | case PSA_ALG_RIPEMD160: |
| 1652 | mbedtls_ripemd160_free( &operation->ctx.ripemd160 ); |
| 1653 | break; |
| 1654 | #endif |
| 1655 | #if defined(MBEDTLS_SHA1_C) |
| 1656 | case PSA_ALG_SHA_1: |
| 1657 | mbedtls_sha1_free( &operation->ctx.sha1 ); |
| 1658 | break; |
| 1659 | #endif |
| 1660 | #if defined(MBEDTLS_SHA256_C) |
| 1661 | case PSA_ALG_SHA_224: |
| 1662 | case PSA_ALG_SHA_256: |
| 1663 | mbedtls_sha256_free( &operation->ctx.sha256 ); |
| 1664 | break; |
| 1665 | #endif |
| 1666 | #if defined(MBEDTLS_SHA512_C) |
| 1667 | case PSA_ALG_SHA_384: |
| 1668 | case PSA_ALG_SHA_512: |
| 1669 | mbedtls_sha512_free( &operation->ctx.sha512 ); |
| 1670 | break; |
| 1671 | #endif |
| 1672 | default: |
Gilles Peskine | f9c2c09 | 2018-06-21 16:57:07 +0200 | [diff] [blame] | 1673 | return( PSA_ERROR_BAD_STATE ); |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1674 | } |
| 1675 | operation->alg = 0; |
| 1676 | return( PSA_SUCCESS ); |
| 1677 | } |
| 1678 | |
Gilles Peskine | da8191d1c | 2018-07-08 19:46:38 +0200 | [diff] [blame] | 1679 | psa_status_t psa_hash_setup( psa_hash_operation_t *operation, |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1680 | psa_algorithm_t alg ) |
| 1681 | { |
| 1682 | int ret; |
Jaeden Amero | 36ee5d0 | 2019-02-19 09:25:10 +0000 | [diff] [blame] | 1683 | |
| 1684 | /* A context must be freshly initialized before it can be set up. */ |
| 1685 | if( operation->alg != 0 ) |
| 1686 | { |
| 1687 | return( PSA_ERROR_BAD_STATE ); |
| 1688 | } |
| 1689 | |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1690 | switch( alg ) |
| 1691 | { |
| 1692 | #if defined(MBEDTLS_MD2_C) |
| 1693 | case PSA_ALG_MD2: |
| 1694 | mbedtls_md2_init( &operation->ctx.md2 ); |
| 1695 | ret = mbedtls_md2_starts_ret( &operation->ctx.md2 ); |
| 1696 | break; |
| 1697 | #endif |
| 1698 | #if defined(MBEDTLS_MD4_C) |
| 1699 | case PSA_ALG_MD4: |
| 1700 | mbedtls_md4_init( &operation->ctx.md4 ); |
| 1701 | ret = mbedtls_md4_starts_ret( &operation->ctx.md4 ); |
| 1702 | break; |
| 1703 | #endif |
| 1704 | #if defined(MBEDTLS_MD5_C) |
| 1705 | case PSA_ALG_MD5: |
| 1706 | mbedtls_md5_init( &operation->ctx.md5 ); |
| 1707 | ret = mbedtls_md5_starts_ret( &operation->ctx.md5 ); |
| 1708 | break; |
| 1709 | #endif |
| 1710 | #if defined(MBEDTLS_RIPEMD160_C) |
| 1711 | case PSA_ALG_RIPEMD160: |
| 1712 | mbedtls_ripemd160_init( &operation->ctx.ripemd160 ); |
| 1713 | ret = mbedtls_ripemd160_starts_ret( &operation->ctx.ripemd160 ); |
| 1714 | break; |
| 1715 | #endif |
| 1716 | #if defined(MBEDTLS_SHA1_C) |
| 1717 | case PSA_ALG_SHA_1: |
| 1718 | mbedtls_sha1_init( &operation->ctx.sha1 ); |
| 1719 | ret = mbedtls_sha1_starts_ret( &operation->ctx.sha1 ); |
| 1720 | break; |
| 1721 | #endif |
| 1722 | #if defined(MBEDTLS_SHA256_C) |
| 1723 | case PSA_ALG_SHA_224: |
| 1724 | mbedtls_sha256_init( &operation->ctx.sha256 ); |
| 1725 | ret = mbedtls_sha256_starts_ret( &operation->ctx.sha256, 1 ); |
| 1726 | break; |
| 1727 | case PSA_ALG_SHA_256: |
| 1728 | mbedtls_sha256_init( &operation->ctx.sha256 ); |
| 1729 | ret = mbedtls_sha256_starts_ret( &operation->ctx.sha256, 0 ); |
| 1730 | break; |
| 1731 | #endif |
| 1732 | #if defined(MBEDTLS_SHA512_C) |
| 1733 | case PSA_ALG_SHA_384: |
| 1734 | mbedtls_sha512_init( &operation->ctx.sha512 ); |
| 1735 | ret = mbedtls_sha512_starts_ret( &operation->ctx.sha512, 1 ); |
| 1736 | break; |
| 1737 | case PSA_ALG_SHA_512: |
| 1738 | mbedtls_sha512_init( &operation->ctx.sha512 ); |
| 1739 | ret = mbedtls_sha512_starts_ret( &operation->ctx.sha512, 0 ); |
| 1740 | break; |
| 1741 | #endif |
| 1742 | default: |
Gilles Peskine | c06e071 | 2018-06-20 16:21:04 +0200 | [diff] [blame] | 1743 | return( PSA_ALG_IS_HASH( alg ) ? |
| 1744 | PSA_ERROR_NOT_SUPPORTED : |
| 1745 | PSA_ERROR_INVALID_ARGUMENT ); |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1746 | } |
| 1747 | if( ret == 0 ) |
| 1748 | operation->alg = alg; |
| 1749 | else |
| 1750 | psa_hash_abort( operation ); |
| 1751 | return( mbedtls_to_psa_error( ret ) ); |
| 1752 | } |
| 1753 | |
| 1754 | psa_status_t psa_hash_update( psa_hash_operation_t *operation, |
| 1755 | const uint8_t *input, |
| 1756 | size_t input_length ) |
| 1757 | { |
| 1758 | int ret; |
Gilles Peskine | 94e4454 | 2018-07-12 16:58:43 +0200 | [diff] [blame] | 1759 | |
| 1760 | /* Don't require hash implementations to behave correctly on a |
| 1761 | * zero-length input, which may have an invalid pointer. */ |
| 1762 | if( input_length == 0 ) |
| 1763 | return( PSA_SUCCESS ); |
| 1764 | |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1765 | switch( operation->alg ) |
| 1766 | { |
| 1767 | #if defined(MBEDTLS_MD2_C) |
| 1768 | case PSA_ALG_MD2: |
| 1769 | ret = mbedtls_md2_update_ret( &operation->ctx.md2, |
| 1770 | input, input_length ); |
| 1771 | break; |
| 1772 | #endif |
| 1773 | #if defined(MBEDTLS_MD4_C) |
| 1774 | case PSA_ALG_MD4: |
| 1775 | ret = mbedtls_md4_update_ret( &operation->ctx.md4, |
| 1776 | input, input_length ); |
| 1777 | break; |
| 1778 | #endif |
| 1779 | #if defined(MBEDTLS_MD5_C) |
| 1780 | case PSA_ALG_MD5: |
| 1781 | ret = mbedtls_md5_update_ret( &operation->ctx.md5, |
| 1782 | input, input_length ); |
| 1783 | break; |
| 1784 | #endif |
| 1785 | #if defined(MBEDTLS_RIPEMD160_C) |
| 1786 | case PSA_ALG_RIPEMD160: |
| 1787 | ret = mbedtls_ripemd160_update_ret( &operation->ctx.ripemd160, |
| 1788 | input, input_length ); |
| 1789 | break; |
| 1790 | #endif |
| 1791 | #if defined(MBEDTLS_SHA1_C) |
| 1792 | case PSA_ALG_SHA_1: |
| 1793 | ret = mbedtls_sha1_update_ret( &operation->ctx.sha1, |
| 1794 | input, input_length ); |
| 1795 | break; |
| 1796 | #endif |
| 1797 | #if defined(MBEDTLS_SHA256_C) |
| 1798 | case PSA_ALG_SHA_224: |
| 1799 | case PSA_ALG_SHA_256: |
| 1800 | ret = mbedtls_sha256_update_ret( &operation->ctx.sha256, |
| 1801 | input, input_length ); |
| 1802 | break; |
| 1803 | #endif |
| 1804 | #if defined(MBEDTLS_SHA512_C) |
| 1805 | case PSA_ALG_SHA_384: |
| 1806 | case PSA_ALG_SHA_512: |
| 1807 | ret = mbedtls_sha512_update_ret( &operation->ctx.sha512, |
| 1808 | input, input_length ); |
| 1809 | break; |
| 1810 | #endif |
| 1811 | default: |
Jaeden Amero | a0f625a | 2019-02-15 13:52:25 +0000 | [diff] [blame] | 1812 | return( PSA_ERROR_BAD_STATE ); |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1813 | } |
Gilles Peskine | 94e4454 | 2018-07-12 16:58:43 +0200 | [diff] [blame] | 1814 | |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1815 | if( ret != 0 ) |
| 1816 | psa_hash_abort( operation ); |
| 1817 | return( mbedtls_to_psa_error( ret ) ); |
| 1818 | } |
| 1819 | |
| 1820 | psa_status_t psa_hash_finish( psa_hash_operation_t *operation, |
| 1821 | uint8_t *hash, |
| 1822 | size_t hash_size, |
| 1823 | size_t *hash_length ) |
| 1824 | { |
itayzafrir | 40835d4 | 2018-08-02 13:14:17 +0300 | [diff] [blame] | 1825 | psa_status_t status; |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1826 | int ret; |
Gilles Peskine | 71bb7b7 | 2018-04-19 08:29:59 +0200 | [diff] [blame] | 1827 | size_t actual_hash_length = PSA_HASH_SIZE( operation->alg ); |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1828 | |
| 1829 | /* Fill the output buffer with something that isn't a valid hash |
| 1830 | * (barring an attack on the hash and deliberately-crafted input), |
| 1831 | * in case the caller doesn't check the return status properly. */ |
Gilles Peskine | aee1333 | 2018-07-02 12:15:28 +0200 | [diff] [blame] | 1832 | *hash_length = hash_size; |
Gilles Peskine | 46f1fd7 | 2018-06-28 19:31:31 +0200 | [diff] [blame] | 1833 | /* If hash_size is 0 then hash may be NULL and then the |
| 1834 | * call to memset would have undefined behavior. */ |
| 1835 | if( hash_size != 0 ) |
| 1836 | memset( hash, '!', hash_size ); |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1837 | |
| 1838 | if( hash_size < actual_hash_length ) |
itayzafrir | 40835d4 | 2018-08-02 13:14:17 +0300 | [diff] [blame] | 1839 | { |
| 1840 | status = PSA_ERROR_BUFFER_TOO_SMALL; |
| 1841 | goto exit; |
| 1842 | } |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1843 | |
| 1844 | switch( operation->alg ) |
| 1845 | { |
| 1846 | #if defined(MBEDTLS_MD2_C) |
| 1847 | case PSA_ALG_MD2: |
| 1848 | ret = mbedtls_md2_finish_ret( &operation->ctx.md2, hash ); |
| 1849 | break; |
| 1850 | #endif |
| 1851 | #if defined(MBEDTLS_MD4_C) |
| 1852 | case PSA_ALG_MD4: |
| 1853 | ret = mbedtls_md4_finish_ret( &operation->ctx.md4, hash ); |
| 1854 | break; |
| 1855 | #endif |
| 1856 | #if defined(MBEDTLS_MD5_C) |
| 1857 | case PSA_ALG_MD5: |
| 1858 | ret = mbedtls_md5_finish_ret( &operation->ctx.md5, hash ); |
| 1859 | break; |
| 1860 | #endif |
| 1861 | #if defined(MBEDTLS_RIPEMD160_C) |
| 1862 | case PSA_ALG_RIPEMD160: |
| 1863 | ret = mbedtls_ripemd160_finish_ret( &operation->ctx.ripemd160, hash ); |
| 1864 | break; |
| 1865 | #endif |
| 1866 | #if defined(MBEDTLS_SHA1_C) |
| 1867 | case PSA_ALG_SHA_1: |
| 1868 | ret = mbedtls_sha1_finish_ret( &operation->ctx.sha1, hash ); |
| 1869 | break; |
| 1870 | #endif |
| 1871 | #if defined(MBEDTLS_SHA256_C) |
| 1872 | case PSA_ALG_SHA_224: |
| 1873 | case PSA_ALG_SHA_256: |
| 1874 | ret = mbedtls_sha256_finish_ret( &operation->ctx.sha256, hash ); |
| 1875 | break; |
| 1876 | #endif |
| 1877 | #if defined(MBEDTLS_SHA512_C) |
| 1878 | case PSA_ALG_SHA_384: |
| 1879 | case PSA_ALG_SHA_512: |
| 1880 | ret = mbedtls_sha512_finish_ret( &operation->ctx.sha512, hash ); |
| 1881 | break; |
| 1882 | #endif |
| 1883 | default: |
Jaeden Amero | a0f625a | 2019-02-15 13:52:25 +0000 | [diff] [blame] | 1884 | return( PSA_ERROR_BAD_STATE ); |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1885 | } |
itayzafrir | 40835d4 | 2018-08-02 13:14:17 +0300 | [diff] [blame] | 1886 | status = mbedtls_to_psa_error( ret ); |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1887 | |
itayzafrir | 40835d4 | 2018-08-02 13:14:17 +0300 | [diff] [blame] | 1888 | exit: |
| 1889 | if( status == PSA_SUCCESS ) |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1890 | { |
Gilles Peskine | aee1333 | 2018-07-02 12:15:28 +0200 | [diff] [blame] | 1891 | *hash_length = actual_hash_length; |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1892 | return( psa_hash_abort( operation ) ); |
| 1893 | } |
| 1894 | else |
| 1895 | { |
| 1896 | psa_hash_abort( operation ); |
itayzafrir | 40835d4 | 2018-08-02 13:14:17 +0300 | [diff] [blame] | 1897 | return( status ); |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1898 | } |
| 1899 | } |
| 1900 | |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 1901 | psa_status_t psa_hash_verify( psa_hash_operation_t *operation, |
| 1902 | const uint8_t *hash, |
| 1903 | size_t hash_length ) |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1904 | { |
| 1905 | uint8_t actual_hash[MBEDTLS_MD_MAX_SIZE]; |
| 1906 | size_t actual_hash_length; |
| 1907 | psa_status_t status = psa_hash_finish( operation, |
| 1908 | actual_hash, sizeof( actual_hash ), |
| 1909 | &actual_hash_length ); |
| 1910 | if( status != PSA_SUCCESS ) |
| 1911 | return( status ); |
| 1912 | if( actual_hash_length != hash_length ) |
| 1913 | return( PSA_ERROR_INVALID_SIGNATURE ); |
| 1914 | if( safer_memcmp( hash, actual_hash, actual_hash_length ) != 0 ) |
| 1915 | return( PSA_ERROR_INVALID_SIGNATURE ); |
| 1916 | return( PSA_SUCCESS ); |
| 1917 | } |
| 1918 | |
Gilles Peskine | eb35d78 | 2019-01-22 17:56:16 +0100 | [diff] [blame] | 1919 | psa_status_t psa_hash_clone( const psa_hash_operation_t *source_operation, |
| 1920 | psa_hash_operation_t *target_operation ) |
Gilles Peskine | ebb2c3e | 2019-01-19 12:03:41 +0100 | [diff] [blame] | 1921 | { |
| 1922 | if( target_operation->alg != 0 ) |
| 1923 | return( PSA_ERROR_BAD_STATE ); |
| 1924 | |
| 1925 | switch( source_operation->alg ) |
| 1926 | { |
| 1927 | case 0: |
| 1928 | return( PSA_ERROR_BAD_STATE ); |
| 1929 | #if defined(MBEDTLS_MD2_C) |
| 1930 | case PSA_ALG_MD2: |
| 1931 | mbedtls_md2_clone( &target_operation->ctx.md2, |
| 1932 | &source_operation->ctx.md2 ); |
| 1933 | break; |
| 1934 | #endif |
| 1935 | #if defined(MBEDTLS_MD4_C) |
| 1936 | case PSA_ALG_MD4: |
| 1937 | mbedtls_md4_clone( &target_operation->ctx.md4, |
| 1938 | &source_operation->ctx.md4 ); |
| 1939 | break; |
| 1940 | #endif |
| 1941 | #if defined(MBEDTLS_MD5_C) |
| 1942 | case PSA_ALG_MD5: |
| 1943 | mbedtls_md5_clone( &target_operation->ctx.md5, |
| 1944 | &source_operation->ctx.md5 ); |
| 1945 | break; |
| 1946 | #endif |
| 1947 | #if defined(MBEDTLS_RIPEMD160_C) |
| 1948 | case PSA_ALG_RIPEMD160: |
| 1949 | mbedtls_ripemd160_clone( &target_operation->ctx.ripemd160, |
| 1950 | &source_operation->ctx.ripemd160 ); |
| 1951 | break; |
| 1952 | #endif |
| 1953 | #if defined(MBEDTLS_SHA1_C) |
| 1954 | case PSA_ALG_SHA_1: |
| 1955 | mbedtls_sha1_clone( &target_operation->ctx.sha1, |
| 1956 | &source_operation->ctx.sha1 ); |
| 1957 | break; |
| 1958 | #endif |
| 1959 | #if defined(MBEDTLS_SHA256_C) |
| 1960 | case PSA_ALG_SHA_224: |
| 1961 | case PSA_ALG_SHA_256: |
| 1962 | mbedtls_sha256_clone( &target_operation->ctx.sha256, |
| 1963 | &source_operation->ctx.sha256 ); |
| 1964 | break; |
| 1965 | #endif |
| 1966 | #if defined(MBEDTLS_SHA512_C) |
| 1967 | case PSA_ALG_SHA_384: |
| 1968 | case PSA_ALG_SHA_512: |
| 1969 | mbedtls_sha512_clone( &target_operation->ctx.sha512, |
| 1970 | &source_operation->ctx.sha512 ); |
| 1971 | break; |
| 1972 | #endif |
| 1973 | default: |
| 1974 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 1975 | } |
| 1976 | |
| 1977 | target_operation->alg = source_operation->alg; |
| 1978 | return( PSA_SUCCESS ); |
| 1979 | } |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1980 | |
| 1981 | |
Gilles Peskine | 9ef733f | 2018-02-07 21:05:37 +0100 | [diff] [blame] | 1982 | /****************************************************************/ |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 1983 | /* MAC */ |
| 1984 | /****************************************************************/ |
| 1985 | |
Gilles Peskine | dc2fc84 | 2018-03-07 16:42:59 +0100 | [diff] [blame] | 1986 | static const mbedtls_cipher_info_t *mbedtls_cipher_info_from_psa( |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 1987 | psa_algorithm_t alg, |
| 1988 | psa_key_type_t key_type, |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 1989 | size_t key_bits, |
mohammad1603 | f4f0d61 | 2018-06-03 15:04:51 +0300 | [diff] [blame] | 1990 | mbedtls_cipher_id_t* cipher_id ) |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 1991 | { |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 1992 | mbedtls_cipher_mode_t mode; |
mohammad1603 | f4f0d61 | 2018-06-03 15:04:51 +0300 | [diff] [blame] | 1993 | mbedtls_cipher_id_t cipher_id_tmp; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 1994 | |
Gilles Peskine | 23cc2ff | 2018-08-17 19:47:52 +0200 | [diff] [blame] | 1995 | if( PSA_ALG_IS_AEAD( alg ) ) |
Gilles Peskine | 57fbdb1 | 2018-10-17 18:29:17 +0200 | [diff] [blame] | 1996 | alg = PSA_ALG_AEAD_WITH_TAG_LENGTH( alg, 0 ); |
Gilles Peskine | 23cc2ff | 2018-08-17 19:47:52 +0200 | [diff] [blame] | 1997 | |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 1998 | if( PSA_ALG_IS_CIPHER( alg ) || PSA_ALG_IS_AEAD( alg ) ) |
| 1999 | { |
Nir Sonnenschein | e9664c3 | 2018-06-17 14:41:30 +0300 | [diff] [blame] | 2000 | switch( alg ) |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2001 | { |
Gilles Peskine | daea26f | 2018-08-21 14:02:45 +0200 | [diff] [blame] | 2002 | case PSA_ALG_ARC4: |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2003 | mode = MBEDTLS_MODE_STREAM; |
| 2004 | break; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2005 | case PSA_ALG_CTR: |
| 2006 | mode = MBEDTLS_MODE_CTR; |
| 2007 | break; |
Gilles Peskine | daea26f | 2018-08-21 14:02:45 +0200 | [diff] [blame] | 2008 | case PSA_ALG_CFB: |
| 2009 | mode = MBEDTLS_MODE_CFB; |
| 2010 | break; |
| 2011 | case PSA_ALG_OFB: |
| 2012 | mode = MBEDTLS_MODE_OFB; |
| 2013 | break; |
| 2014 | case PSA_ALG_CBC_NO_PADDING: |
| 2015 | mode = MBEDTLS_MODE_CBC; |
| 2016 | break; |
| 2017 | case PSA_ALG_CBC_PKCS7: |
| 2018 | mode = MBEDTLS_MODE_CBC; |
| 2019 | break; |
Gilles Peskine | 57fbdb1 | 2018-10-17 18:29:17 +0200 | [diff] [blame] | 2020 | case PSA_ALG_AEAD_WITH_TAG_LENGTH( PSA_ALG_CCM, 0 ): |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2021 | mode = MBEDTLS_MODE_CCM; |
| 2022 | break; |
Gilles Peskine | 57fbdb1 | 2018-10-17 18:29:17 +0200 | [diff] [blame] | 2023 | case PSA_ALG_AEAD_WITH_TAG_LENGTH( PSA_ALG_GCM, 0 ): |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2024 | mode = MBEDTLS_MODE_GCM; |
| 2025 | break; |
| 2026 | default: |
| 2027 | return( NULL ); |
| 2028 | } |
| 2029 | } |
| 2030 | else if( alg == PSA_ALG_CMAC ) |
| 2031 | mode = MBEDTLS_MODE_ECB; |
| 2032 | else if( alg == PSA_ALG_GMAC ) |
| 2033 | mode = MBEDTLS_MODE_GCM; |
| 2034 | else |
| 2035 | return( NULL ); |
| 2036 | |
| 2037 | switch( key_type ) |
| 2038 | { |
| 2039 | case PSA_KEY_TYPE_AES: |
mohammad1603 | f4f0d61 | 2018-06-03 15:04:51 +0300 | [diff] [blame] | 2040 | cipher_id_tmp = MBEDTLS_CIPHER_ID_AES; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2041 | break; |
| 2042 | case PSA_KEY_TYPE_DES: |
Gilles Peskine | 9ad29e2 | 2018-06-21 09:40:04 +0200 | [diff] [blame] | 2043 | /* key_bits is 64 for Single-DES, 128 for two-key Triple-DES, |
| 2044 | * and 192 for three-key Triple-DES. */ |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2045 | if( key_bits == 64 ) |
mohammad1603 | f4f0d61 | 2018-06-03 15:04:51 +0300 | [diff] [blame] | 2046 | cipher_id_tmp = MBEDTLS_CIPHER_ID_DES; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2047 | else |
mohammad1603 | f4f0d61 | 2018-06-03 15:04:51 +0300 | [diff] [blame] | 2048 | cipher_id_tmp = MBEDTLS_CIPHER_ID_3DES; |
Gilles Peskine | 9ad29e2 | 2018-06-21 09:40:04 +0200 | [diff] [blame] | 2049 | /* mbedtls doesn't recognize two-key Triple-DES as an algorithm, |
| 2050 | * but two-key Triple-DES is functionally three-key Triple-DES |
| 2051 | * with K1=K3, so that's how we present it to mbedtls. */ |
| 2052 | if( key_bits == 128 ) |
| 2053 | key_bits = 192; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2054 | break; |
| 2055 | case PSA_KEY_TYPE_CAMELLIA: |
mohammad1603 | f4f0d61 | 2018-06-03 15:04:51 +0300 | [diff] [blame] | 2056 | cipher_id_tmp = MBEDTLS_CIPHER_ID_CAMELLIA; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2057 | break; |
| 2058 | case PSA_KEY_TYPE_ARC4: |
mohammad1603 | f4f0d61 | 2018-06-03 15:04:51 +0300 | [diff] [blame] | 2059 | cipher_id_tmp = MBEDTLS_CIPHER_ID_ARC4; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2060 | break; |
| 2061 | default: |
| 2062 | return( NULL ); |
| 2063 | } |
mohammad1603 | f4f0d61 | 2018-06-03 15:04:51 +0300 | [diff] [blame] | 2064 | if( cipher_id != NULL ) |
mohammad1603 | 60a64d0 | 2018-06-03 17:20:42 +0300 | [diff] [blame] | 2065 | *cipher_id = cipher_id_tmp; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2066 | |
Jaeden Amero | 23bbb75 | 2018-06-26 14:16:54 +0100 | [diff] [blame] | 2067 | return( mbedtls_cipher_info_from_values( cipher_id_tmp, |
| 2068 | (int) key_bits, mode ) ); |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2069 | } |
| 2070 | |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 2071 | #if defined(MBEDTLS_MD_C) |
Nir Sonnenschein | aa5aea0 | 2018-06-18 12:24:33 +0300 | [diff] [blame] | 2072 | static size_t psa_get_hash_block_size( psa_algorithm_t alg ) |
Nir Sonnenschein | 9627241 | 2018-06-17 14:41:10 +0300 | [diff] [blame] | 2073 | { |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 2074 | switch( alg ) |
Nir Sonnenschein | 9627241 | 2018-06-17 14:41:10 +0300 | [diff] [blame] | 2075 | { |
| 2076 | case PSA_ALG_MD2: |
Nir Sonnenschein | aa5aea0 | 2018-06-18 12:24:33 +0300 | [diff] [blame] | 2077 | return( 16 ); |
Nir Sonnenschein | 9627241 | 2018-06-17 14:41:10 +0300 | [diff] [blame] | 2078 | case PSA_ALG_MD4: |
Nir Sonnenschein | aa5aea0 | 2018-06-18 12:24:33 +0300 | [diff] [blame] | 2079 | return( 64 ); |
Nir Sonnenschein | 9627241 | 2018-06-17 14:41:10 +0300 | [diff] [blame] | 2080 | case PSA_ALG_MD5: |
Nir Sonnenschein | aa5aea0 | 2018-06-18 12:24:33 +0300 | [diff] [blame] | 2081 | return( 64 ); |
Nir Sonnenschein | 9627241 | 2018-06-17 14:41:10 +0300 | [diff] [blame] | 2082 | case PSA_ALG_RIPEMD160: |
Nir Sonnenschein | aa5aea0 | 2018-06-18 12:24:33 +0300 | [diff] [blame] | 2083 | return( 64 ); |
Nir Sonnenschein | 9627241 | 2018-06-17 14:41:10 +0300 | [diff] [blame] | 2084 | case PSA_ALG_SHA_1: |
Nir Sonnenschein | aa5aea0 | 2018-06-18 12:24:33 +0300 | [diff] [blame] | 2085 | return( 64 ); |
Nir Sonnenschein | 9627241 | 2018-06-17 14:41:10 +0300 | [diff] [blame] | 2086 | case PSA_ALG_SHA_224: |
Nir Sonnenschein | aa5aea0 | 2018-06-18 12:24:33 +0300 | [diff] [blame] | 2087 | return( 64 ); |
Nir Sonnenschein | 9627241 | 2018-06-17 14:41:10 +0300 | [diff] [blame] | 2088 | case PSA_ALG_SHA_256: |
Nir Sonnenschein | aa5aea0 | 2018-06-18 12:24:33 +0300 | [diff] [blame] | 2089 | return( 64 ); |
Nir Sonnenschein | 9627241 | 2018-06-17 14:41:10 +0300 | [diff] [blame] | 2090 | case PSA_ALG_SHA_384: |
Nir Sonnenschein | aa5aea0 | 2018-06-18 12:24:33 +0300 | [diff] [blame] | 2091 | return( 128 ); |
Nir Sonnenschein | 9627241 | 2018-06-17 14:41:10 +0300 | [diff] [blame] | 2092 | case PSA_ALG_SHA_512: |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 2093 | return( 128 ); |
| 2094 | default: |
| 2095 | return( 0 ); |
Nir Sonnenschein | 9627241 | 2018-06-17 14:41:10 +0300 | [diff] [blame] | 2096 | } |
| 2097 | } |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 2098 | #endif /* MBEDTLS_MD_C */ |
Nir Sonnenschein | 0c9ec53 | 2018-06-07 13:27:47 +0300 | [diff] [blame] | 2099 | |
Gilles Peskine | 16c0f4f | 2018-06-20 16:05:20 +0200 | [diff] [blame] | 2100 | /* Initialize the MAC operation structure. Once this function has been |
| 2101 | * called, psa_mac_abort can run and will do the right thing. */ |
| 2102 | static psa_status_t psa_mac_init( psa_mac_operation_t *operation, |
| 2103 | psa_algorithm_t alg ) |
| 2104 | { |
| 2105 | psa_status_t status = PSA_ERROR_NOT_SUPPORTED; |
| 2106 | |
| 2107 | operation->alg = alg; |
| 2108 | operation->key_set = 0; |
| 2109 | operation->iv_set = 0; |
| 2110 | operation->iv_required = 0; |
| 2111 | operation->has_input = 0; |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2112 | operation->is_sign = 0; |
Gilles Peskine | 16c0f4f | 2018-06-20 16:05:20 +0200 | [diff] [blame] | 2113 | |
| 2114 | #if defined(MBEDTLS_CMAC_C) |
| 2115 | if( alg == PSA_ALG_CMAC ) |
| 2116 | { |
| 2117 | operation->iv_required = 0; |
| 2118 | mbedtls_cipher_init( &operation->ctx.cmac ); |
| 2119 | status = PSA_SUCCESS; |
| 2120 | } |
| 2121 | else |
| 2122 | #endif /* MBEDTLS_CMAC_C */ |
| 2123 | #if defined(MBEDTLS_MD_C) |
| 2124 | if( PSA_ALG_IS_HMAC( operation->alg ) ) |
| 2125 | { |
Gilles Peskine | ff94abd | 2018-07-12 17:07:52 +0200 | [diff] [blame] | 2126 | /* We'll set up the hash operation later in psa_hmac_setup_internal. */ |
| 2127 | operation->ctx.hmac.hash_ctx.alg = 0; |
| 2128 | status = PSA_SUCCESS; |
Gilles Peskine | 16c0f4f | 2018-06-20 16:05:20 +0200 | [diff] [blame] | 2129 | } |
| 2130 | else |
| 2131 | #endif /* MBEDTLS_MD_C */ |
| 2132 | { |
Gilles Peskine | c06e071 | 2018-06-20 16:21:04 +0200 | [diff] [blame] | 2133 | if( ! PSA_ALG_IS_MAC( alg ) ) |
| 2134 | status = PSA_ERROR_INVALID_ARGUMENT; |
Gilles Peskine | 16c0f4f | 2018-06-20 16:05:20 +0200 | [diff] [blame] | 2135 | } |
| 2136 | |
| 2137 | if( status != PSA_SUCCESS ) |
| 2138 | memset( operation, 0, sizeof( *operation ) ); |
| 2139 | return( status ); |
| 2140 | } |
| 2141 | |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2142 | #if defined(MBEDTLS_MD_C) |
| 2143 | static psa_status_t psa_hmac_abort_internal( psa_hmac_internal_data *hmac ) |
| 2144 | { |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 2145 | mbedtls_platform_zeroize( hmac->opad, sizeof( hmac->opad ) ); |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2146 | return( psa_hash_abort( &hmac->hash_ctx ) ); |
| 2147 | } |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 2148 | |
| 2149 | static void psa_hmac_init_internal( psa_hmac_internal_data *hmac ) |
| 2150 | { |
| 2151 | /* Instances of psa_hash_operation_s can be initialized by zeroization. */ |
| 2152 | memset( hmac, 0, sizeof( *hmac ) ); |
| 2153 | } |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2154 | #endif /* MBEDTLS_MD_C */ |
| 2155 | |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2156 | psa_status_t psa_mac_abort( psa_mac_operation_t *operation ) |
| 2157 | { |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2158 | if( operation->alg == 0 ) |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2159 | { |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2160 | /* The object has (apparently) been initialized but it is not |
| 2161 | * in use. It's ok to call abort on such an object, and there's |
| 2162 | * nothing to do. */ |
| 2163 | return( PSA_SUCCESS ); |
| 2164 | } |
| 2165 | else |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2166 | #if defined(MBEDTLS_CMAC_C) |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2167 | if( operation->alg == PSA_ALG_CMAC ) |
| 2168 | { |
| 2169 | mbedtls_cipher_free( &operation->ctx.cmac ); |
| 2170 | } |
| 2171 | else |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2172 | #endif /* MBEDTLS_CMAC_C */ |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2173 | #if defined(MBEDTLS_MD_C) |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2174 | if( PSA_ALG_IS_HMAC( operation->alg ) ) |
| 2175 | { |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2176 | psa_hmac_abort_internal( &operation->ctx.hmac ); |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2177 | } |
| 2178 | else |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2179 | #endif /* MBEDTLS_MD_C */ |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2180 | { |
| 2181 | /* Sanity check (shouldn't happen: operation->alg should |
| 2182 | * always have been initialized to a valid value). */ |
| 2183 | goto bad_state; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2184 | } |
Moran Peker | 41deec4 | 2018-04-04 15:43:05 +0300 | [diff] [blame] | 2185 | |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2186 | operation->alg = 0; |
| 2187 | operation->key_set = 0; |
| 2188 | operation->iv_set = 0; |
| 2189 | operation->iv_required = 0; |
| 2190 | operation->has_input = 0; |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2191 | operation->is_sign = 0; |
Moran Peker | 41deec4 | 2018-04-04 15:43:05 +0300 | [diff] [blame] | 2192 | |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2193 | return( PSA_SUCCESS ); |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2194 | |
| 2195 | bad_state: |
| 2196 | /* If abort is called on an uninitialized object, we can't trust |
| 2197 | * anything. Wipe the object in case it contains confidential data. |
| 2198 | * This may result in a memory leak if a pointer gets overwritten, |
| 2199 | * but it's too late to do anything about this. */ |
| 2200 | memset( operation, 0, sizeof( *operation ) ); |
| 2201 | return( PSA_ERROR_BAD_STATE ); |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2202 | } |
| 2203 | |
Gilles Peskine | e3b07d8 | 2018-06-19 11:57:35 +0200 | [diff] [blame] | 2204 | #if defined(MBEDTLS_CMAC_C) |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2205 | static int psa_cmac_setup( psa_mac_operation_t *operation, |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2206 | size_t key_bits, |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 2207 | psa_key_slot_t *slot, |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2208 | const mbedtls_cipher_info_t *cipher_info ) |
| 2209 | { |
| 2210 | int ret; |
| 2211 | |
| 2212 | operation->mac_size = cipher_info->block_size; |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2213 | |
| 2214 | ret = mbedtls_cipher_setup( &operation->ctx.cmac, cipher_info ); |
| 2215 | if( ret != 0 ) |
| 2216 | return( ret ); |
| 2217 | |
| 2218 | ret = mbedtls_cipher_cmac_starts( &operation->ctx.cmac, |
| 2219 | slot->data.raw.data, |
| 2220 | key_bits ); |
| 2221 | return( ret ); |
| 2222 | } |
Gilles Peskine | e3b07d8 | 2018-06-19 11:57:35 +0200 | [diff] [blame] | 2223 | #endif /* MBEDTLS_CMAC_C */ |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2224 | |
Gilles Peskine | 248051a | 2018-06-20 16:09:38 +0200 | [diff] [blame] | 2225 | #if defined(MBEDTLS_MD_C) |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2226 | static psa_status_t psa_hmac_setup_internal( psa_hmac_internal_data *hmac, |
| 2227 | const uint8_t *key, |
| 2228 | size_t key_length, |
| 2229 | psa_algorithm_t hash_alg ) |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2230 | { |
Gilles Peskine | b3e6e5d | 2018-06-18 22:16:43 +0200 | [diff] [blame] | 2231 | unsigned char ipad[PSA_HMAC_MAX_HASH_BLOCK_SIZE]; |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2232 | size_t i; |
Gilles Peskine | 9aa369e | 2018-07-16 00:36:29 +0200 | [diff] [blame] | 2233 | size_t hash_size = PSA_HASH_SIZE( hash_alg ); |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2234 | size_t block_size = psa_get_hash_block_size( hash_alg ); |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2235 | psa_status_t status; |
| 2236 | |
Gilles Peskine | 9aa369e | 2018-07-16 00:36:29 +0200 | [diff] [blame] | 2237 | /* Sanity checks on block_size, to guarantee that there won't be a buffer |
| 2238 | * overflow below. This should never trigger if the hash algorithm |
| 2239 | * is implemented correctly. */ |
| 2240 | /* The size checks against the ipad and opad buffers cannot be written |
| 2241 | * `block_size > sizeof( ipad ) || block_size > sizeof( hmac->opad )` |
| 2242 | * because that triggers -Wlogical-op on GCC 7.3. */ |
| 2243 | if( block_size > sizeof( ipad ) ) |
| 2244 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 2245 | if( block_size > sizeof( hmac->opad ) ) |
| 2246 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 2247 | if( block_size < hash_size ) |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2248 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 2249 | |
Gilles Peskine | d223b52 | 2018-06-11 18:12:58 +0200 | [diff] [blame] | 2250 | if( key_length > block_size ) |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2251 | { |
Gilles Peskine | 1e6bfdf | 2018-07-17 16:22:47 +0200 | [diff] [blame] | 2252 | status = psa_hash_setup( &hmac->hash_ctx, hash_alg ); |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2253 | if( status != PSA_SUCCESS ) |
Gilles Peskine | 1e6bfdf | 2018-07-17 16:22:47 +0200 | [diff] [blame] | 2254 | goto cleanup; |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2255 | status = psa_hash_update( &hmac->hash_ctx, key, key_length ); |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2256 | if( status != PSA_SUCCESS ) |
Gilles Peskine | b8be288 | 2018-07-17 16:24:34 +0200 | [diff] [blame] | 2257 | goto cleanup; |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2258 | status = psa_hash_finish( &hmac->hash_ctx, |
Gilles Peskine | d223b52 | 2018-06-11 18:12:58 +0200 | [diff] [blame] | 2259 | ipad, sizeof( ipad ), &key_length ); |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2260 | if( status != PSA_SUCCESS ) |
Gilles Peskine | b8be288 | 2018-07-17 16:24:34 +0200 | [diff] [blame] | 2261 | goto cleanup; |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2262 | } |
Gilles Peskine | 9688997 | 2018-07-12 17:07:03 +0200 | [diff] [blame] | 2263 | /* A 0-length key is not commonly used in HMAC when used as a MAC, |
| 2264 | * but it is permitted. It is common when HMAC is used in HKDF, for |
| 2265 | * example. Don't call `memcpy` in the 0-length because `key` could be |
| 2266 | * an invalid pointer which would make the behavior undefined. */ |
| 2267 | else if( key_length != 0 ) |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2268 | memcpy( ipad, key, key_length ); |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2269 | |
Gilles Peskine | d223b52 | 2018-06-11 18:12:58 +0200 | [diff] [blame] | 2270 | /* ipad contains the key followed by garbage. Xor and fill with 0x36 |
| 2271 | * to create the ipad value. */ |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2272 | for( i = 0; i < key_length; i++ ) |
Gilles Peskine | d223b52 | 2018-06-11 18:12:58 +0200 | [diff] [blame] | 2273 | ipad[i] ^= 0x36; |
| 2274 | memset( ipad + key_length, 0x36, block_size - key_length ); |
| 2275 | |
| 2276 | /* Copy the key material from ipad to opad, flipping the requisite bits, |
| 2277 | * and filling the rest of opad with the requisite constant. */ |
| 2278 | for( i = 0; i < key_length; i++ ) |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2279 | hmac->opad[i] = ipad[i] ^ 0x36 ^ 0x5C; |
| 2280 | memset( hmac->opad + key_length, 0x5C, block_size - key_length ); |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2281 | |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2282 | status = psa_hash_setup( &hmac->hash_ctx, hash_alg ); |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2283 | if( status != PSA_SUCCESS ) |
Gilles Peskine | 6a0a44e | 2018-06-11 17:42:48 +0200 | [diff] [blame] | 2284 | goto cleanup; |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2285 | |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2286 | status = psa_hash_update( &hmac->hash_ctx, ipad, block_size ); |
Gilles Peskine | 6a0a44e | 2018-06-11 17:42:48 +0200 | [diff] [blame] | 2287 | |
| 2288 | cleanup: |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 2289 | mbedtls_platform_zeroize( ipad, key_length ); |
Gilles Peskine | 6a0a44e | 2018-06-11 17:42:48 +0200 | [diff] [blame] | 2290 | |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2291 | return( status ); |
| 2292 | } |
Gilles Peskine | 248051a | 2018-06-20 16:09:38 +0200 | [diff] [blame] | 2293 | #endif /* MBEDTLS_MD_C */ |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2294 | |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2295 | static psa_status_t psa_mac_setup( psa_mac_operation_t *operation, |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 2296 | psa_key_handle_t handle, |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2297 | psa_algorithm_t alg, |
| 2298 | int is_sign ) |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2299 | { |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2300 | psa_status_t status; |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 2301 | psa_key_slot_t *slot; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2302 | size_t key_bits; |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2303 | psa_key_usage_t usage = |
| 2304 | is_sign ? PSA_KEY_USAGE_SIGN : PSA_KEY_USAGE_VERIFY; |
Gilles Peskine | d911eb7 | 2018-08-14 15:18:45 +0200 | [diff] [blame] | 2305 | unsigned char truncated = PSA_MAC_TRUNCATED_LENGTH( alg ); |
Gilles Peskine | e0e9c7c | 2018-10-17 18:28:05 +0200 | [diff] [blame] | 2306 | psa_algorithm_t full_length_alg = PSA_ALG_FULL_LENGTH_MAC( alg ); |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2307 | |
Jaeden Amero | 36ee5d0 | 2019-02-19 09:25:10 +0000 | [diff] [blame] | 2308 | /* A context must be freshly initialized before it can be set up. */ |
| 2309 | if( operation->alg != 0 ) |
| 2310 | { |
| 2311 | return( PSA_ERROR_BAD_STATE ); |
| 2312 | } |
| 2313 | |
Gilles Peskine | d911eb7 | 2018-08-14 15:18:45 +0200 | [diff] [blame] | 2314 | status = psa_mac_init( operation, full_length_alg ); |
Gilles Peskine | 16c0f4f | 2018-06-20 16:05:20 +0200 | [diff] [blame] | 2315 | if( status != PSA_SUCCESS ) |
| 2316 | return( status ); |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2317 | if( is_sign ) |
| 2318 | operation->is_sign = 1; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2319 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 2320 | status = psa_get_key_from_slot( handle, &slot, usage, alg ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 2321 | if( status != PSA_SUCCESS ) |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2322 | goto exit; |
Gilles Peskine | db4b3ab | 2019-04-18 12:53:01 +0200 | [diff] [blame] | 2323 | key_bits = psa_get_key_slot_bits( slot ); |
Gilles Peskine | ab1d7ab | 2018-07-06 16:07:47 +0200 | [diff] [blame] | 2324 | |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2325 | #if defined(MBEDTLS_CMAC_C) |
Gilles Peskine | d911eb7 | 2018-08-14 15:18:45 +0200 | [diff] [blame] | 2326 | if( full_length_alg == PSA_ALG_CMAC ) |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2327 | { |
| 2328 | const mbedtls_cipher_info_t *cipher_info = |
Gilles Peskine | d911eb7 | 2018-08-14 15:18:45 +0200 | [diff] [blame] | 2329 | mbedtls_cipher_info_from_psa( full_length_alg, |
| 2330 | slot->type, key_bits, NULL ); |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2331 | int ret; |
| 2332 | if( cipher_info == NULL ) |
| 2333 | { |
| 2334 | status = PSA_ERROR_NOT_SUPPORTED; |
| 2335 | goto exit; |
| 2336 | } |
| 2337 | operation->mac_size = cipher_info->block_size; |
| 2338 | ret = psa_cmac_setup( operation, key_bits, slot, cipher_info ); |
| 2339 | status = mbedtls_to_psa_error( ret ); |
| 2340 | } |
| 2341 | else |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2342 | #endif /* MBEDTLS_CMAC_C */ |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2343 | #if defined(MBEDTLS_MD_C) |
Gilles Peskine | d911eb7 | 2018-08-14 15:18:45 +0200 | [diff] [blame] | 2344 | if( PSA_ALG_IS_HMAC( full_length_alg ) ) |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2345 | { |
Gilles Peskine | 00709fa | 2018-08-22 18:25:41 +0200 | [diff] [blame] | 2346 | psa_algorithm_t hash_alg = PSA_ALG_HMAC_GET_HASH( alg ); |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2347 | if( hash_alg == 0 ) |
| 2348 | { |
| 2349 | status = PSA_ERROR_NOT_SUPPORTED; |
| 2350 | goto exit; |
| 2351 | } |
Gilles Peskine | 9aa369e | 2018-07-16 00:36:29 +0200 | [diff] [blame] | 2352 | |
| 2353 | operation->mac_size = PSA_HASH_SIZE( hash_alg ); |
| 2354 | /* Sanity check. This shouldn't fail on a valid configuration. */ |
| 2355 | if( operation->mac_size == 0 || |
| 2356 | operation->mac_size > sizeof( operation->ctx.hmac.opad ) ) |
| 2357 | { |
| 2358 | status = PSA_ERROR_NOT_SUPPORTED; |
| 2359 | goto exit; |
| 2360 | } |
| 2361 | |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2362 | if( slot->type != PSA_KEY_TYPE_HMAC ) |
| 2363 | { |
| 2364 | status = PSA_ERROR_INVALID_ARGUMENT; |
| 2365 | goto exit; |
| 2366 | } |
Gilles Peskine | 9aa369e | 2018-07-16 00:36:29 +0200 | [diff] [blame] | 2367 | |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2368 | status = psa_hmac_setup_internal( &operation->ctx.hmac, |
| 2369 | slot->data.raw.data, |
| 2370 | slot->data.raw.bytes, |
| 2371 | hash_alg ); |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2372 | } |
| 2373 | else |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2374 | #endif /* MBEDTLS_MD_C */ |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2375 | { |
Jaeden Amero | 82df32e | 2018-11-23 15:11:20 +0000 | [diff] [blame] | 2376 | (void) key_bits; |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2377 | status = PSA_ERROR_NOT_SUPPORTED; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2378 | } |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2379 | |
Gilles Peskine | d911eb7 | 2018-08-14 15:18:45 +0200 | [diff] [blame] | 2380 | if( truncated == 0 ) |
| 2381 | { |
| 2382 | /* The "normal" case: untruncated algorithm. Nothing to do. */ |
| 2383 | } |
| 2384 | else if( truncated < 4 ) |
| 2385 | { |
Gilles Peskine | 6d72ff9 | 2018-08-21 14:55:08 +0200 | [diff] [blame] | 2386 | /* A very short MAC is too short for security since it can be |
| 2387 | * brute-forced. Ancient protocols with 32-bit MACs do exist, |
| 2388 | * so we make this our minimum, even though 32 bits is still |
| 2389 | * too small for security. */ |
Gilles Peskine | d911eb7 | 2018-08-14 15:18:45 +0200 | [diff] [blame] | 2390 | status = PSA_ERROR_NOT_SUPPORTED; |
| 2391 | } |
| 2392 | else if( truncated > operation->mac_size ) |
| 2393 | { |
| 2394 | /* It's impossible to "truncate" to a larger length. */ |
| 2395 | status = PSA_ERROR_INVALID_ARGUMENT; |
| 2396 | } |
| 2397 | else |
| 2398 | operation->mac_size = truncated; |
| 2399 | |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2400 | exit: |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2401 | if( status != PSA_SUCCESS ) |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2402 | { |
Gilles Peskine | 6a0a44e | 2018-06-11 17:42:48 +0200 | [diff] [blame] | 2403 | psa_mac_abort( operation ); |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2404 | } |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2405 | else |
| 2406 | { |
Gilles Peskine | 7e454bc | 2018-06-11 17:26:17 +0200 | [diff] [blame] | 2407 | operation->key_set = 1; |
| 2408 | } |
| 2409 | return( status ); |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2410 | } |
| 2411 | |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2412 | psa_status_t psa_mac_sign_setup( psa_mac_operation_t *operation, |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 2413 | psa_key_handle_t handle, |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2414 | psa_algorithm_t alg ) |
| 2415 | { |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 2416 | return( psa_mac_setup( operation, handle, alg, 1 ) ); |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2417 | } |
| 2418 | |
| 2419 | psa_status_t psa_mac_verify_setup( psa_mac_operation_t *operation, |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 2420 | psa_key_handle_t handle, |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2421 | psa_algorithm_t alg ) |
| 2422 | { |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 2423 | return( psa_mac_setup( operation, handle, alg, 0 ) ); |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2424 | } |
| 2425 | |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2426 | psa_status_t psa_mac_update( psa_mac_operation_t *operation, |
| 2427 | const uint8_t *input, |
| 2428 | size_t input_length ) |
| 2429 | { |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2430 | psa_status_t status = PSA_ERROR_BAD_STATE; |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2431 | if( ! operation->key_set ) |
Jaeden Amero | e236c2a | 2019-02-20 15:37:15 +0000 | [diff] [blame] | 2432 | return( PSA_ERROR_BAD_STATE ); |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2433 | if( operation->iv_required && ! operation->iv_set ) |
Jaeden Amero | e236c2a | 2019-02-20 15:37:15 +0000 | [diff] [blame] | 2434 | return( PSA_ERROR_BAD_STATE ); |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2435 | operation->has_input = 1; |
| 2436 | |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2437 | #if defined(MBEDTLS_CMAC_C) |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2438 | if( operation->alg == PSA_ALG_CMAC ) |
Nir Sonnenschein | dcd636a | 2018-06-04 16:03:32 +0300 | [diff] [blame] | 2439 | { |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2440 | int ret = mbedtls_cipher_cmac_update( &operation->ctx.cmac, |
| 2441 | input, input_length ); |
| 2442 | status = mbedtls_to_psa_error( ret ); |
| 2443 | } |
| 2444 | else |
| 2445 | #endif /* MBEDTLS_CMAC_C */ |
| 2446 | #if defined(MBEDTLS_MD_C) |
| 2447 | if( PSA_ALG_IS_HMAC( operation->alg ) ) |
| 2448 | { |
| 2449 | status = psa_hash_update( &operation->ctx.hmac.hash_ctx, input, |
| 2450 | input_length ); |
| 2451 | } |
| 2452 | else |
| 2453 | #endif /* MBEDTLS_MD_C */ |
| 2454 | { |
| 2455 | /* This shouldn't happen if `operation` was initialized by |
| 2456 | * a setup function. */ |
Jaeden Amero | e236c2a | 2019-02-20 15:37:15 +0000 | [diff] [blame] | 2457 | return( PSA_ERROR_BAD_STATE ); |
Nir Sonnenschein | dcd636a | 2018-06-04 16:03:32 +0300 | [diff] [blame] | 2458 | } |
| 2459 | |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2460 | if( status != PSA_SUCCESS ) |
| 2461 | psa_mac_abort( operation ); |
Gilles Peskine | c1bb6c8 | 2018-06-18 16:04:39 +0200 | [diff] [blame] | 2462 | return( status ); |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2463 | } |
| 2464 | |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2465 | #if defined(MBEDTLS_MD_C) |
| 2466 | static psa_status_t psa_hmac_finish_internal( psa_hmac_internal_data *hmac, |
| 2467 | uint8_t *mac, |
| 2468 | size_t mac_size ) |
| 2469 | { |
| 2470 | unsigned char tmp[MBEDTLS_MD_MAX_SIZE]; |
| 2471 | psa_algorithm_t hash_alg = hmac->hash_ctx.alg; |
| 2472 | size_t hash_size = 0; |
| 2473 | size_t block_size = psa_get_hash_block_size( hash_alg ); |
| 2474 | psa_status_t status; |
| 2475 | |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2476 | status = psa_hash_finish( &hmac->hash_ctx, tmp, sizeof( tmp ), &hash_size ); |
| 2477 | if( status != PSA_SUCCESS ) |
| 2478 | return( status ); |
| 2479 | /* From here on, tmp needs to be wiped. */ |
| 2480 | |
| 2481 | status = psa_hash_setup( &hmac->hash_ctx, hash_alg ); |
| 2482 | if( status != PSA_SUCCESS ) |
| 2483 | goto exit; |
| 2484 | |
| 2485 | status = psa_hash_update( &hmac->hash_ctx, hmac->opad, block_size ); |
| 2486 | if( status != PSA_SUCCESS ) |
| 2487 | goto exit; |
| 2488 | |
| 2489 | status = psa_hash_update( &hmac->hash_ctx, tmp, hash_size ); |
| 2490 | if( status != PSA_SUCCESS ) |
| 2491 | goto exit; |
| 2492 | |
Gilles Peskine | d911eb7 | 2018-08-14 15:18:45 +0200 | [diff] [blame] | 2493 | status = psa_hash_finish( &hmac->hash_ctx, tmp, sizeof( tmp ), &hash_size ); |
| 2494 | if( status != PSA_SUCCESS ) |
| 2495 | goto exit; |
| 2496 | |
| 2497 | memcpy( mac, tmp, mac_size ); |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2498 | |
| 2499 | exit: |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 2500 | mbedtls_platform_zeroize( tmp, hash_size ); |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2501 | return( status ); |
| 2502 | } |
| 2503 | #endif /* MBEDTLS_MD_C */ |
| 2504 | |
mohammad1603 | 6df908f | 2018-04-02 08:34:15 -0700 | [diff] [blame] | 2505 | static psa_status_t psa_mac_finish_internal( psa_mac_operation_t *operation, |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 2506 | uint8_t *mac, |
Gilles Peskine | 5d0b864 | 2018-07-08 20:35:02 +0200 | [diff] [blame] | 2507 | size_t mac_size ) |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2508 | { |
Gilles Peskine | 1d96fff | 2018-07-02 12:15:39 +0200 | [diff] [blame] | 2509 | if( ! operation->key_set ) |
| 2510 | return( PSA_ERROR_BAD_STATE ); |
| 2511 | if( operation->iv_required && ! operation->iv_set ) |
| 2512 | return( PSA_ERROR_BAD_STATE ); |
| 2513 | |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2514 | if( mac_size < operation->mac_size ) |
| 2515 | return( PSA_ERROR_BUFFER_TOO_SMALL ); |
| 2516 | |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2517 | #if defined(MBEDTLS_CMAC_C) |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2518 | if( operation->alg == PSA_ALG_CMAC ) |
| 2519 | { |
Gilles Peskine | d911eb7 | 2018-08-14 15:18:45 +0200 | [diff] [blame] | 2520 | uint8_t tmp[PSA_MAX_BLOCK_CIPHER_BLOCK_SIZE]; |
| 2521 | int ret = mbedtls_cipher_cmac_finish( &operation->ctx.cmac, tmp ); |
| 2522 | if( ret == 0 ) |
Gilles Peskine | 87b0ac4 | 2018-08-21 14:55:49 +0200 | [diff] [blame] | 2523 | memcpy( mac, tmp, operation->mac_size ); |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 2524 | mbedtls_platform_zeroize( tmp, sizeof( tmp ) ); |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2525 | return( mbedtls_to_psa_error( ret ) ); |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2526 | } |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2527 | else |
| 2528 | #endif /* MBEDTLS_CMAC_C */ |
| 2529 | #if defined(MBEDTLS_MD_C) |
| 2530 | if( PSA_ALG_IS_HMAC( operation->alg ) ) |
| 2531 | { |
Gilles Peskine | 01126fa | 2018-07-12 17:04:55 +0200 | [diff] [blame] | 2532 | return( psa_hmac_finish_internal( &operation->ctx.hmac, |
Gilles Peskine | d911eb7 | 2018-08-14 15:18:45 +0200 | [diff] [blame] | 2533 | mac, operation->mac_size ) ); |
Gilles Peskine | fbfac68 | 2018-07-08 20:51:54 +0200 | [diff] [blame] | 2534 | } |
| 2535 | else |
| 2536 | #endif /* MBEDTLS_MD_C */ |
| 2537 | { |
| 2538 | /* This shouldn't happen if `operation` was initialized by |
| 2539 | * a setup function. */ |
| 2540 | return( PSA_ERROR_BAD_STATE ); |
| 2541 | } |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2542 | } |
| 2543 | |
Gilles Peskine | acd4be3 | 2018-07-08 19:56:25 +0200 | [diff] [blame] | 2544 | psa_status_t psa_mac_sign_finish( psa_mac_operation_t *operation, |
| 2545 | uint8_t *mac, |
| 2546 | size_t mac_size, |
| 2547 | size_t *mac_length ) |
mohammad1603 | 6df908f | 2018-04-02 08:34:15 -0700 | [diff] [blame] | 2548 | { |
Gilles Peskine | 5d0b864 | 2018-07-08 20:35:02 +0200 | [diff] [blame] | 2549 | psa_status_t status; |
| 2550 | |
Jaeden Amero | 252ef28 | 2019-02-15 14:05:35 +0000 | [diff] [blame] | 2551 | if( operation->alg == 0 ) |
| 2552 | { |
| 2553 | return( PSA_ERROR_BAD_STATE ); |
| 2554 | } |
| 2555 | |
Gilles Peskine | 5d0b864 | 2018-07-08 20:35:02 +0200 | [diff] [blame] | 2556 | /* Fill the output buffer with something that isn't a valid mac |
| 2557 | * (barring an attack on the mac and deliberately-crafted input), |
| 2558 | * in case the caller doesn't check the return status properly. */ |
| 2559 | *mac_length = mac_size; |
| 2560 | /* If mac_size is 0 then mac may be NULL and then the |
| 2561 | * call to memset would have undefined behavior. */ |
| 2562 | if( mac_size != 0 ) |
| 2563 | memset( mac, '!', mac_size ); |
| 2564 | |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2565 | if( ! operation->is_sign ) |
| 2566 | { |
Jaeden Amero | e236c2a | 2019-02-20 15:37:15 +0000 | [diff] [blame] | 2567 | return( PSA_ERROR_BAD_STATE ); |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2568 | } |
mohammad1603 | 6df908f | 2018-04-02 08:34:15 -0700 | [diff] [blame] | 2569 | |
Gilles Peskine | 5d0b864 | 2018-07-08 20:35:02 +0200 | [diff] [blame] | 2570 | status = psa_mac_finish_internal( operation, mac, mac_size ); |
| 2571 | |
Gilles Peskine | 5d0b864 | 2018-07-08 20:35:02 +0200 | [diff] [blame] | 2572 | if( status == PSA_SUCCESS ) |
| 2573 | { |
| 2574 | status = psa_mac_abort( operation ); |
| 2575 | if( status == PSA_SUCCESS ) |
| 2576 | *mac_length = operation->mac_size; |
| 2577 | else |
| 2578 | memset( mac, '!', mac_size ); |
| 2579 | } |
| 2580 | else |
| 2581 | psa_mac_abort( operation ); |
| 2582 | return( status ); |
mohammad1603 | 6df908f | 2018-04-02 08:34:15 -0700 | [diff] [blame] | 2583 | } |
| 2584 | |
Gilles Peskine | acd4be3 | 2018-07-08 19:56:25 +0200 | [diff] [blame] | 2585 | psa_status_t psa_mac_verify_finish( psa_mac_operation_t *operation, |
| 2586 | const uint8_t *mac, |
| 2587 | size_t mac_length ) |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2588 | { |
Gilles Peskine | 828ed14 | 2018-06-18 23:25:51 +0200 | [diff] [blame] | 2589 | uint8_t actual_mac[PSA_MAC_MAX_SIZE]; |
mohammad1603 | 6df908f | 2018-04-02 08:34:15 -0700 | [diff] [blame] | 2590 | psa_status_t status; |
| 2591 | |
Jaeden Amero | 252ef28 | 2019-02-15 14:05:35 +0000 | [diff] [blame] | 2592 | if( operation->alg == 0 ) |
| 2593 | { |
| 2594 | return( PSA_ERROR_BAD_STATE ); |
| 2595 | } |
| 2596 | |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2597 | if( operation->is_sign ) |
| 2598 | { |
Jaeden Amero | e236c2a | 2019-02-20 15:37:15 +0000 | [diff] [blame] | 2599 | return( PSA_ERROR_BAD_STATE ); |
Gilles Peskine | 5d0b864 | 2018-07-08 20:35:02 +0200 | [diff] [blame] | 2600 | } |
| 2601 | if( operation->mac_size != mac_length ) |
| 2602 | { |
| 2603 | status = PSA_ERROR_INVALID_SIGNATURE; |
| 2604 | goto cleanup; |
Gilles Peskine | 89167cb | 2018-07-08 20:12:23 +0200 | [diff] [blame] | 2605 | } |
mohammad1603 | 6df908f | 2018-04-02 08:34:15 -0700 | [diff] [blame] | 2606 | |
| 2607 | status = psa_mac_finish_internal( operation, |
Gilles Peskine | 5d0b864 | 2018-07-08 20:35:02 +0200 | [diff] [blame] | 2608 | actual_mac, sizeof( actual_mac ) ); |
| 2609 | |
| 2610 | if( safer_memcmp( mac, actual_mac, mac_length ) != 0 ) |
| 2611 | status = PSA_ERROR_INVALID_SIGNATURE; |
| 2612 | |
| 2613 | cleanup: |
| 2614 | if( status == PSA_SUCCESS ) |
| 2615 | status = psa_mac_abort( operation ); |
| 2616 | else |
| 2617 | psa_mac_abort( operation ); |
| 2618 | |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 2619 | mbedtls_platform_zeroize( actual_mac, sizeof( actual_mac ) ); |
Gilles Peskine | d911eb7 | 2018-08-14 15:18:45 +0200 | [diff] [blame] | 2620 | |
Gilles Peskine | 5d0b864 | 2018-07-08 20:35:02 +0200 | [diff] [blame] | 2621 | return( status ); |
Gilles Peskine | 8c9def3 | 2018-02-08 10:02:12 +0100 | [diff] [blame] | 2622 | } |
| 2623 | |
| 2624 | |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 2625 | |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 2626 | /****************************************************************/ |
| 2627 | /* Asymmetric cryptography */ |
| 2628 | /****************************************************************/ |
| 2629 | |
Gilles Peskine | 2b450e3 | 2018-06-27 15:42:46 +0200 | [diff] [blame] | 2630 | #if defined(MBEDTLS_RSA_C) |
Gilles Peskine | 8b18a4f | 2018-06-08 16:34:46 +0200 | [diff] [blame] | 2631 | /* Decode the hash algorithm from alg and store the mbedtls encoding in |
Gilles Peskine | 71ac7b1 | 2018-06-29 23:36:35 +0200 | [diff] [blame] | 2632 | * md_alg. Verify that the hash length is acceptable. */ |
Gilles Peskine | 8b18a4f | 2018-06-08 16:34:46 +0200 | [diff] [blame] | 2633 | static psa_status_t psa_rsa_decode_md_type( psa_algorithm_t alg, |
| 2634 | size_t hash_length, |
| 2635 | mbedtls_md_type_t *md_alg ) |
Nir Sonnenschein | 4db79eb | 2018-06-04 16:40:31 +0300 | [diff] [blame] | 2636 | { |
Gilles Peskine | 7ed29c5 | 2018-06-26 15:50:08 +0200 | [diff] [blame] | 2637 | psa_algorithm_t hash_alg = PSA_ALG_SIGN_GET_HASH( alg ); |
Gilles Peskine | 61b91d4 | 2018-06-08 16:09:36 +0200 | [diff] [blame] | 2638 | const mbedtls_md_info_t *md_info = mbedtls_md_info_from_psa( hash_alg ); |
Gilles Peskine | 71ac7b1 | 2018-06-29 23:36:35 +0200 | [diff] [blame] | 2639 | *md_alg = mbedtls_md_get_type( md_info ); |
| 2640 | |
| 2641 | /* The Mbed TLS RSA module uses an unsigned int for hash length |
| 2642 | * parameters. Validate that it fits so that we don't risk an |
| 2643 | * overflow later. */ |
Nir Sonnenschein | 4db79eb | 2018-06-04 16:40:31 +0300 | [diff] [blame] | 2644 | #if SIZE_MAX > UINT_MAX |
Gilles Peskine | 71ac7b1 | 2018-06-29 23:36:35 +0200 | [diff] [blame] | 2645 | if( hash_length > UINT_MAX ) |
| 2646 | return( PSA_ERROR_INVALID_ARGUMENT ); |
Nir Sonnenschein | 4db79eb | 2018-06-04 16:40:31 +0300 | [diff] [blame] | 2647 | #endif |
Gilles Peskine | 71ac7b1 | 2018-06-29 23:36:35 +0200 | [diff] [blame] | 2648 | |
| 2649 | #if defined(MBEDTLS_PKCS1_V15) |
| 2650 | /* For PKCS#1 v1.5 signature, if using a hash, the hash length |
| 2651 | * must be correct. */ |
| 2652 | if( PSA_ALG_IS_RSA_PKCS1V15_SIGN( alg ) && |
| 2653 | alg != PSA_ALG_RSA_PKCS1V15_SIGN_RAW ) |
Nir Sonnenschein | 4db79eb | 2018-06-04 16:40:31 +0300 | [diff] [blame] | 2654 | { |
Gilles Peskine | 71ac7b1 | 2018-06-29 23:36:35 +0200 | [diff] [blame] | 2655 | if( md_info == NULL ) |
| 2656 | return( PSA_ERROR_NOT_SUPPORTED ); |
Gilles Peskine | 61b91d4 | 2018-06-08 16:09:36 +0200 | [diff] [blame] | 2657 | if( mbedtls_md_get_size( md_info ) != hash_length ) |
| 2658 | return( PSA_ERROR_INVALID_ARGUMENT ); |
Gilles Peskine | 71ac7b1 | 2018-06-29 23:36:35 +0200 | [diff] [blame] | 2659 | } |
| 2660 | #endif /* MBEDTLS_PKCS1_V15 */ |
| 2661 | |
| 2662 | #if defined(MBEDTLS_PKCS1_V21) |
| 2663 | /* PSS requires a hash internally. */ |
| 2664 | if( PSA_ALG_IS_RSA_PSS( alg ) ) |
| 2665 | { |
Gilles Peskine | 61b91d4 | 2018-06-08 16:09:36 +0200 | [diff] [blame] | 2666 | if( md_info == NULL ) |
| 2667 | return( PSA_ERROR_NOT_SUPPORTED ); |
Nir Sonnenschein | 4db79eb | 2018-06-04 16:40:31 +0300 | [diff] [blame] | 2668 | } |
Gilles Peskine | 71ac7b1 | 2018-06-29 23:36:35 +0200 | [diff] [blame] | 2669 | #endif /* MBEDTLS_PKCS1_V21 */ |
| 2670 | |
Gilles Peskine | 61b91d4 | 2018-06-08 16:09:36 +0200 | [diff] [blame] | 2671 | return( PSA_SUCCESS ); |
Nir Sonnenschein | 4db79eb | 2018-06-04 16:40:31 +0300 | [diff] [blame] | 2672 | } |
| 2673 | |
Gilles Peskine | 2b450e3 | 2018-06-27 15:42:46 +0200 | [diff] [blame] | 2674 | static psa_status_t psa_rsa_sign( mbedtls_rsa_context *rsa, |
| 2675 | psa_algorithm_t alg, |
| 2676 | const uint8_t *hash, |
| 2677 | size_t hash_length, |
| 2678 | uint8_t *signature, |
| 2679 | size_t signature_size, |
| 2680 | size_t *signature_length ) |
| 2681 | { |
| 2682 | psa_status_t status; |
| 2683 | int ret; |
| 2684 | mbedtls_md_type_t md_alg; |
| 2685 | |
| 2686 | status = psa_rsa_decode_md_type( alg, hash_length, &md_alg ); |
| 2687 | if( status != PSA_SUCCESS ) |
| 2688 | return( status ); |
| 2689 | |
Gilles Peskine | 630a18a | 2018-06-29 17:49:35 +0200 | [diff] [blame] | 2690 | if( signature_size < mbedtls_rsa_get_len( rsa ) ) |
Gilles Peskine | 2b450e3 | 2018-06-27 15:42:46 +0200 | [diff] [blame] | 2691 | return( PSA_ERROR_BUFFER_TOO_SMALL ); |
| 2692 | |
| 2693 | #if defined(MBEDTLS_PKCS1_V15) |
| 2694 | if( PSA_ALG_IS_RSA_PKCS1V15_SIGN( alg ) ) |
| 2695 | { |
| 2696 | mbedtls_rsa_set_padding( rsa, MBEDTLS_RSA_PKCS_V15, |
| 2697 | MBEDTLS_MD_NONE ); |
| 2698 | ret = mbedtls_rsa_pkcs1_sign( rsa, |
| 2699 | mbedtls_ctr_drbg_random, |
| 2700 | &global_data.ctr_drbg, |
| 2701 | MBEDTLS_RSA_PRIVATE, |
Jaeden Amero | bbf97e3 | 2018-06-26 14:20:51 +0100 | [diff] [blame] | 2702 | md_alg, |
| 2703 | (unsigned int) hash_length, |
| 2704 | hash, |
Gilles Peskine | 2b450e3 | 2018-06-27 15:42:46 +0200 | [diff] [blame] | 2705 | signature ); |
| 2706 | } |
| 2707 | else |
| 2708 | #endif /* MBEDTLS_PKCS1_V15 */ |
| 2709 | #if defined(MBEDTLS_PKCS1_V21) |
| 2710 | if( PSA_ALG_IS_RSA_PSS( alg ) ) |
| 2711 | { |
| 2712 | mbedtls_rsa_set_padding( rsa, MBEDTLS_RSA_PKCS_V21, md_alg ); |
| 2713 | ret = mbedtls_rsa_rsassa_pss_sign( rsa, |
| 2714 | mbedtls_ctr_drbg_random, |
| 2715 | &global_data.ctr_drbg, |
| 2716 | MBEDTLS_RSA_PRIVATE, |
Gilles Peskine | 71ac7b1 | 2018-06-29 23:36:35 +0200 | [diff] [blame] | 2717 | MBEDTLS_MD_NONE, |
Jaeden Amero | bbf97e3 | 2018-06-26 14:20:51 +0100 | [diff] [blame] | 2718 | (unsigned int) hash_length, |
| 2719 | hash, |
Gilles Peskine | 2b450e3 | 2018-06-27 15:42:46 +0200 | [diff] [blame] | 2720 | signature ); |
| 2721 | } |
| 2722 | else |
| 2723 | #endif /* MBEDTLS_PKCS1_V21 */ |
| 2724 | { |
| 2725 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 2726 | } |
| 2727 | |
| 2728 | if( ret == 0 ) |
Gilles Peskine | 630a18a | 2018-06-29 17:49:35 +0200 | [diff] [blame] | 2729 | *signature_length = mbedtls_rsa_get_len( rsa ); |
Gilles Peskine | 2b450e3 | 2018-06-27 15:42:46 +0200 | [diff] [blame] | 2730 | return( mbedtls_to_psa_error( ret ) ); |
| 2731 | } |
| 2732 | |
| 2733 | static psa_status_t psa_rsa_verify( mbedtls_rsa_context *rsa, |
| 2734 | psa_algorithm_t alg, |
| 2735 | const uint8_t *hash, |
| 2736 | size_t hash_length, |
| 2737 | const uint8_t *signature, |
| 2738 | size_t signature_length ) |
| 2739 | { |
| 2740 | psa_status_t status; |
| 2741 | int ret; |
| 2742 | mbedtls_md_type_t md_alg; |
| 2743 | |
| 2744 | status = psa_rsa_decode_md_type( alg, hash_length, &md_alg ); |
| 2745 | if( status != PSA_SUCCESS ) |
| 2746 | return( status ); |
| 2747 | |
Gilles Peskine | 630a18a | 2018-06-29 17:49:35 +0200 | [diff] [blame] | 2748 | if( signature_length < mbedtls_rsa_get_len( rsa ) ) |
Gilles Peskine | 2b450e3 | 2018-06-27 15:42:46 +0200 | [diff] [blame] | 2749 | return( PSA_ERROR_BUFFER_TOO_SMALL ); |
| 2750 | |
| 2751 | #if defined(MBEDTLS_PKCS1_V15) |
| 2752 | if( PSA_ALG_IS_RSA_PKCS1V15_SIGN( alg ) ) |
| 2753 | { |
| 2754 | mbedtls_rsa_set_padding( rsa, MBEDTLS_RSA_PKCS_V15, |
| 2755 | MBEDTLS_MD_NONE ); |
| 2756 | ret = mbedtls_rsa_pkcs1_verify( rsa, |
| 2757 | mbedtls_ctr_drbg_random, |
| 2758 | &global_data.ctr_drbg, |
| 2759 | MBEDTLS_RSA_PUBLIC, |
| 2760 | md_alg, |
Jaeden Amero | bbf97e3 | 2018-06-26 14:20:51 +0100 | [diff] [blame] | 2761 | (unsigned int) hash_length, |
Gilles Peskine | 2b450e3 | 2018-06-27 15:42:46 +0200 | [diff] [blame] | 2762 | hash, |
| 2763 | signature ); |
| 2764 | } |
| 2765 | else |
| 2766 | #endif /* MBEDTLS_PKCS1_V15 */ |
| 2767 | #if defined(MBEDTLS_PKCS1_V21) |
| 2768 | if( PSA_ALG_IS_RSA_PSS( alg ) ) |
| 2769 | { |
| 2770 | mbedtls_rsa_set_padding( rsa, MBEDTLS_RSA_PKCS_V21, md_alg ); |
| 2771 | ret = mbedtls_rsa_rsassa_pss_verify( rsa, |
| 2772 | mbedtls_ctr_drbg_random, |
| 2773 | &global_data.ctr_drbg, |
| 2774 | MBEDTLS_RSA_PUBLIC, |
Gilles Peskine | 71ac7b1 | 2018-06-29 23:36:35 +0200 | [diff] [blame] | 2775 | MBEDTLS_MD_NONE, |
Jaeden Amero | bbf97e3 | 2018-06-26 14:20:51 +0100 | [diff] [blame] | 2776 | (unsigned int) hash_length, |
| 2777 | hash, |
Gilles Peskine | 2b450e3 | 2018-06-27 15:42:46 +0200 | [diff] [blame] | 2778 | signature ); |
| 2779 | } |
| 2780 | else |
| 2781 | #endif /* MBEDTLS_PKCS1_V21 */ |
| 2782 | { |
| 2783 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 2784 | } |
Gilles Peskine | ef12c63 | 2018-09-13 20:37:48 +0200 | [diff] [blame] | 2785 | |
| 2786 | /* Mbed TLS distinguishes "invalid padding" from "valid padding but |
| 2787 | * the rest of the signature is invalid". This has little use in |
| 2788 | * practice and PSA doesn't report this distinction. */ |
| 2789 | if( ret == MBEDTLS_ERR_RSA_INVALID_PADDING ) |
| 2790 | return( PSA_ERROR_INVALID_SIGNATURE ); |
Gilles Peskine | 2b450e3 | 2018-06-27 15:42:46 +0200 | [diff] [blame] | 2791 | return( mbedtls_to_psa_error( ret ) ); |
| 2792 | } |
| 2793 | #endif /* MBEDTLS_RSA_C */ |
| 2794 | |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2795 | #if defined(MBEDTLS_ECDSA_C) |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2796 | /* `ecp` cannot be const because `ecp->grp` needs to be non-const |
| 2797 | * for mbedtls_ecdsa_sign() and mbedtls_ecdsa_sign_det() |
| 2798 | * (even though these functions don't modify it). */ |
| 2799 | static psa_status_t psa_ecdsa_sign( mbedtls_ecp_keypair *ecp, |
| 2800 | psa_algorithm_t alg, |
| 2801 | const uint8_t *hash, |
| 2802 | size_t hash_length, |
| 2803 | uint8_t *signature, |
| 2804 | size_t signature_size, |
| 2805 | size_t *signature_length ) |
| 2806 | { |
| 2807 | int ret; |
| 2808 | mbedtls_mpi r, s; |
Gilles Peskine | eae6eee | 2018-06-28 13:56:01 +0200 | [diff] [blame] | 2809 | size_t curve_bytes = PSA_BITS_TO_BYTES( ecp->grp.pbits ); |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2810 | mbedtls_mpi_init( &r ); |
| 2811 | mbedtls_mpi_init( &s ); |
| 2812 | |
Gilles Peskine | eae6eee | 2018-06-28 13:56:01 +0200 | [diff] [blame] | 2813 | if( signature_size < 2 * curve_bytes ) |
| 2814 | { |
| 2815 | ret = MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL; |
| 2816 | goto cleanup; |
| 2817 | } |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2818 | |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 2819 | #if defined(MBEDTLS_ECDSA_DETERMINISTIC) |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2820 | if( PSA_ALG_DSA_IS_DETERMINISTIC( alg ) ) |
| 2821 | { |
| 2822 | psa_algorithm_t hash_alg = PSA_ALG_SIGN_GET_HASH( alg ); |
| 2823 | const mbedtls_md_info_t *md_info = mbedtls_md_info_from_psa( hash_alg ); |
| 2824 | mbedtls_md_type_t md_alg = mbedtls_md_get_type( md_info ); |
| 2825 | MBEDTLS_MPI_CHK( mbedtls_ecdsa_sign_det( &ecp->grp, &r, &s, &ecp->d, |
| 2826 | hash, hash_length, |
| 2827 | md_alg ) ); |
| 2828 | } |
| 2829 | else |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 2830 | #endif /* MBEDTLS_ECDSA_DETERMINISTIC */ |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2831 | { |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 2832 | (void) alg; |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2833 | MBEDTLS_MPI_CHK( mbedtls_ecdsa_sign( &ecp->grp, &r, &s, &ecp->d, |
| 2834 | hash, hash_length, |
| 2835 | mbedtls_ctr_drbg_random, |
| 2836 | &global_data.ctr_drbg ) ); |
| 2837 | } |
Gilles Peskine | eae6eee | 2018-06-28 13:56:01 +0200 | [diff] [blame] | 2838 | |
| 2839 | MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &r, |
| 2840 | signature, |
| 2841 | curve_bytes ) ); |
| 2842 | MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &s, |
| 2843 | signature + curve_bytes, |
| 2844 | curve_bytes ) ); |
| 2845 | |
| 2846 | cleanup: |
| 2847 | mbedtls_mpi_free( &r ); |
| 2848 | mbedtls_mpi_free( &s ); |
| 2849 | if( ret == 0 ) |
| 2850 | *signature_length = 2 * curve_bytes; |
Gilles Peskine | eae6eee | 2018-06-28 13:56:01 +0200 | [diff] [blame] | 2851 | return( mbedtls_to_psa_error( ret ) ); |
| 2852 | } |
| 2853 | |
| 2854 | static psa_status_t psa_ecdsa_verify( mbedtls_ecp_keypair *ecp, |
| 2855 | const uint8_t *hash, |
| 2856 | size_t hash_length, |
| 2857 | const uint8_t *signature, |
| 2858 | size_t signature_length ) |
| 2859 | { |
| 2860 | int ret; |
| 2861 | mbedtls_mpi r, s; |
| 2862 | size_t curve_bytes = PSA_BITS_TO_BYTES( ecp->grp.pbits ); |
| 2863 | mbedtls_mpi_init( &r ); |
| 2864 | mbedtls_mpi_init( &s ); |
| 2865 | |
| 2866 | if( signature_length != 2 * curve_bytes ) |
| 2867 | return( PSA_ERROR_INVALID_SIGNATURE ); |
| 2868 | |
| 2869 | MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &r, |
| 2870 | signature, |
| 2871 | curve_bytes ) ); |
| 2872 | MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &s, |
| 2873 | signature + curve_bytes, |
| 2874 | curve_bytes ) ); |
| 2875 | |
| 2876 | ret = mbedtls_ecdsa_verify( &ecp->grp, hash, hash_length, |
| 2877 | &ecp->Q, &r, &s ); |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2878 | |
| 2879 | cleanup: |
| 2880 | mbedtls_mpi_free( &r ); |
| 2881 | mbedtls_mpi_free( &s ); |
| 2882 | return( mbedtls_to_psa_error( ret ) ); |
| 2883 | } |
| 2884 | #endif /* MBEDTLS_ECDSA_C */ |
| 2885 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 2886 | psa_status_t psa_asymmetric_sign( psa_key_handle_t handle, |
Gilles Peskine | 61b91d4 | 2018-06-08 16:09:36 +0200 | [diff] [blame] | 2887 | psa_algorithm_t alg, |
| 2888 | const uint8_t *hash, |
| 2889 | size_t hash_length, |
Gilles Peskine | 61b91d4 | 2018-06-08 16:09:36 +0200 | [diff] [blame] | 2890 | uint8_t *signature, |
| 2891 | size_t signature_size, |
| 2892 | size_t *signature_length ) |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 2893 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 2894 | psa_key_slot_t *slot; |
Gilles Peskine | a26ff6a | 2018-06-28 12:21:19 +0200 | [diff] [blame] | 2895 | psa_status_t status; |
| 2896 | |
| 2897 | *signature_length = signature_size; |
| 2898 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 2899 | status = psa_get_key_from_slot( handle, &slot, PSA_KEY_USAGE_SIGN, alg ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 2900 | if( status != PSA_SUCCESS ) |
Gilles Peskine | a26ff6a | 2018-06-28 12:21:19 +0200 | [diff] [blame] | 2901 | goto exit; |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 2902 | if( ! PSA_KEY_TYPE_IS_KEYPAIR( slot->type ) ) |
Gilles Peskine | a26ff6a | 2018-06-28 12:21:19 +0200 | [diff] [blame] | 2903 | { |
| 2904 | status = PSA_ERROR_INVALID_ARGUMENT; |
| 2905 | goto exit; |
| 2906 | } |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 2907 | |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 2908 | #if defined(MBEDTLS_RSA_C) |
| 2909 | if( slot->type == PSA_KEY_TYPE_RSA_KEYPAIR ) |
| 2910 | { |
Gilles Peskine | a26ff6a | 2018-06-28 12:21:19 +0200 | [diff] [blame] | 2911 | status = psa_rsa_sign( slot->data.rsa, |
| 2912 | alg, |
| 2913 | hash, hash_length, |
| 2914 | signature, signature_size, |
| 2915 | signature_length ); |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 2916 | } |
| 2917 | else |
| 2918 | #endif /* defined(MBEDTLS_RSA_C) */ |
| 2919 | #if defined(MBEDTLS_ECP_C) |
| 2920 | if( PSA_KEY_TYPE_IS_ECC( slot->type ) ) |
| 2921 | { |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2922 | #if defined(MBEDTLS_ECDSA_C) |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 2923 | if( |
| 2924 | #if defined(MBEDTLS_ECDSA_DETERMINISTIC) |
| 2925 | PSA_ALG_IS_ECDSA( alg ) |
| 2926 | #else |
| 2927 | PSA_ALG_IS_RANDOMIZED_ECDSA( alg ) |
| 2928 | #endif |
| 2929 | ) |
Gilles Peskine | a26ff6a | 2018-06-28 12:21:19 +0200 | [diff] [blame] | 2930 | status = psa_ecdsa_sign( slot->data.ecp, |
| 2931 | alg, |
| 2932 | hash, hash_length, |
| 2933 | signature, signature_size, |
| 2934 | signature_length ); |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2935 | else |
| 2936 | #endif /* defined(MBEDTLS_ECDSA_C) */ |
| 2937 | { |
Gilles Peskine | a26ff6a | 2018-06-28 12:21:19 +0200 | [diff] [blame] | 2938 | status = PSA_ERROR_INVALID_ARGUMENT; |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2939 | } |
itayzafrir | 5c75339 | 2018-05-08 11:18:38 +0300 | [diff] [blame] | 2940 | } |
| 2941 | else |
| 2942 | #endif /* defined(MBEDTLS_ECP_C) */ |
| 2943 | { |
Gilles Peskine | a26ff6a | 2018-06-28 12:21:19 +0200 | [diff] [blame] | 2944 | status = PSA_ERROR_NOT_SUPPORTED; |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 2945 | } |
Gilles Peskine | a26ff6a | 2018-06-28 12:21:19 +0200 | [diff] [blame] | 2946 | |
| 2947 | exit: |
| 2948 | /* Fill the unused part of the output buffer (the whole buffer on error, |
| 2949 | * the trailing part on success) with something that isn't a valid mac |
| 2950 | * (barring an attack on the mac and deliberately-crafted input), |
| 2951 | * in case the caller doesn't check the return status properly. */ |
| 2952 | if( status == PSA_SUCCESS ) |
| 2953 | memset( signature + *signature_length, '!', |
| 2954 | signature_size - *signature_length ); |
Gilles Peskine | 46f1fd7 | 2018-06-28 19:31:31 +0200 | [diff] [blame] | 2955 | else if( signature_size != 0 ) |
Gilles Peskine | a26ff6a | 2018-06-28 12:21:19 +0200 | [diff] [blame] | 2956 | memset( signature, '!', signature_size ); |
Gilles Peskine | 46f1fd7 | 2018-06-28 19:31:31 +0200 | [diff] [blame] | 2957 | /* If signature_size is 0 then we have nothing to do. We must not call |
| 2958 | * memset because signature may be NULL in this case. */ |
Gilles Peskine | a26ff6a | 2018-06-28 12:21:19 +0200 | [diff] [blame] | 2959 | return( status ); |
itayzafrir | 5c75339 | 2018-05-08 11:18:38 +0300 | [diff] [blame] | 2960 | } |
| 2961 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 2962 | psa_status_t psa_asymmetric_verify( psa_key_handle_t handle, |
itayzafrir | 5c75339 | 2018-05-08 11:18:38 +0300 | [diff] [blame] | 2963 | psa_algorithm_t alg, |
| 2964 | const uint8_t *hash, |
| 2965 | size_t hash_length, |
Gilles Peskine | e9191ff | 2018-06-27 14:58:41 +0200 | [diff] [blame] | 2966 | const uint8_t *signature, |
Gilles Peskine | 526fab0 | 2018-06-27 18:19:40 +0200 | [diff] [blame] | 2967 | size_t signature_length ) |
itayzafrir | 5c75339 | 2018-05-08 11:18:38 +0300 | [diff] [blame] | 2968 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 2969 | psa_key_slot_t *slot; |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 2970 | psa_status_t status; |
Gilles Peskine | 2b450e3 | 2018-06-27 15:42:46 +0200 | [diff] [blame] | 2971 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 2972 | status = psa_get_key_from_slot( handle, &slot, PSA_KEY_USAGE_VERIFY, alg ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 2973 | if( status != PSA_SUCCESS ) |
| 2974 | return( status ); |
itayzafrir | 5c75339 | 2018-05-08 11:18:38 +0300 | [diff] [blame] | 2975 | |
Gilles Peskine | 61b91d4 | 2018-06-08 16:09:36 +0200 | [diff] [blame] | 2976 | #if defined(MBEDTLS_RSA_C) |
Gilles Peskine | d8008d6 | 2018-06-29 19:51:51 +0200 | [diff] [blame] | 2977 | if( PSA_KEY_TYPE_IS_RSA( slot->type ) ) |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 2978 | { |
Gilles Peskine | 2b450e3 | 2018-06-27 15:42:46 +0200 | [diff] [blame] | 2979 | return( psa_rsa_verify( slot->data.rsa, |
| 2980 | alg, |
| 2981 | hash, hash_length, |
| 2982 | signature, signature_length ) ); |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 2983 | } |
| 2984 | else |
| 2985 | #endif /* defined(MBEDTLS_RSA_C) */ |
itayzafrir | 5c75339 | 2018-05-08 11:18:38 +0300 | [diff] [blame] | 2986 | #if defined(MBEDTLS_ECP_C) |
| 2987 | if( PSA_KEY_TYPE_IS_ECC( slot->type ) ) |
| 2988 | { |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2989 | #if defined(MBEDTLS_ECDSA_C) |
| 2990 | if( PSA_ALG_IS_ECDSA( alg ) ) |
Gilles Peskine | eae6eee | 2018-06-28 13:56:01 +0200 | [diff] [blame] | 2991 | return( psa_ecdsa_verify( slot->data.ecp, |
| 2992 | hash, hash_length, |
| 2993 | signature, signature_length ) ); |
Gilles Peskine | a81d85b | 2018-06-26 16:10:23 +0200 | [diff] [blame] | 2994 | else |
| 2995 | #endif /* defined(MBEDTLS_ECDSA_C) */ |
| 2996 | { |
| 2997 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 2998 | } |
itayzafrir | 5c75339 | 2018-05-08 11:18:38 +0300 | [diff] [blame] | 2999 | } |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 3000 | else |
| 3001 | #endif /* defined(MBEDTLS_ECP_C) */ |
| 3002 | { |
| 3003 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 3004 | } |
| 3005 | } |
| 3006 | |
Gilles Peskine | 072ac56 | 2018-06-30 00:21:29 +0200 | [diff] [blame] | 3007 | #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V21) |
| 3008 | static void psa_rsa_oaep_set_padding_mode( psa_algorithm_t alg, |
| 3009 | mbedtls_rsa_context *rsa ) |
| 3010 | { |
| 3011 | psa_algorithm_t hash_alg = PSA_ALG_RSA_OAEP_GET_HASH( alg ); |
| 3012 | const mbedtls_md_info_t *md_info = mbedtls_md_info_from_psa( hash_alg ); |
| 3013 | mbedtls_md_type_t md_alg = mbedtls_md_get_type( md_info ); |
| 3014 | mbedtls_rsa_set_padding( rsa, MBEDTLS_RSA_PKCS_V21, md_alg ); |
| 3015 | } |
| 3016 | #endif /* defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V21) */ |
| 3017 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3018 | psa_status_t psa_asymmetric_encrypt( psa_key_handle_t handle, |
Gilles Peskine | 61b91d4 | 2018-06-08 16:09:36 +0200 | [diff] [blame] | 3019 | psa_algorithm_t alg, |
| 3020 | const uint8_t *input, |
| 3021 | size_t input_length, |
| 3022 | const uint8_t *salt, |
| 3023 | size_t salt_length, |
| 3024 | uint8_t *output, |
| 3025 | size_t output_size, |
| 3026 | size_t *output_length ) |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3027 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 3028 | psa_key_slot_t *slot; |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3029 | psa_status_t status; |
| 3030 | |
Darryl Green | 5cc689a | 2018-07-24 15:34:10 +0100 | [diff] [blame] | 3031 | (void) input; |
| 3032 | (void) input_length; |
| 3033 | (void) salt; |
| 3034 | (void) output; |
| 3035 | (void) output_size; |
| 3036 | |
Nir Sonnenschein | ca466c8 | 2018-06-04 16:43:12 +0300 | [diff] [blame] | 3037 | *output_length = 0; |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3038 | |
Gilles Peskine | b3fc05d | 2018-06-30 19:04:35 +0200 | [diff] [blame] | 3039 | if( ! PSA_ALG_IS_RSA_OAEP( alg ) && salt_length != 0 ) |
| 3040 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 3041 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3042 | status = psa_get_key_from_slot( handle, &slot, PSA_KEY_USAGE_ENCRYPT, alg ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3043 | if( status != PSA_SUCCESS ) |
| 3044 | return( status ); |
Gilles Peskine | 35da9a2 | 2018-06-29 19:17:49 +0200 | [diff] [blame] | 3045 | if( ! ( PSA_KEY_TYPE_IS_PUBLIC_KEY( slot->type ) || |
| 3046 | PSA_KEY_TYPE_IS_KEYPAIR( slot->type ) ) ) |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3047 | return( PSA_ERROR_INVALID_ARGUMENT ); |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3048 | |
| 3049 | #if defined(MBEDTLS_RSA_C) |
Gilles Peskine | d8008d6 | 2018-06-29 19:51:51 +0200 | [diff] [blame] | 3050 | if( PSA_KEY_TYPE_IS_RSA( slot->type ) ) |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3051 | { |
| 3052 | mbedtls_rsa_context *rsa = slot->data.rsa; |
| 3053 | int ret; |
Gilles Peskine | 630a18a | 2018-06-29 17:49:35 +0200 | [diff] [blame] | 3054 | if( output_size < mbedtls_rsa_get_len( rsa ) ) |
Gilles Peskine | 61b91d4 | 2018-06-08 16:09:36 +0200 | [diff] [blame] | 3055 | return( PSA_ERROR_INVALID_ARGUMENT ); |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3056 | #if defined(MBEDTLS_PKCS1_V15) |
Gilles Peskine | 6afe789 | 2018-05-31 13:16:08 +0200 | [diff] [blame] | 3057 | if( alg == PSA_ALG_RSA_PKCS1V15_CRYPT ) |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3058 | { |
Gilles Peskine | 61b91d4 | 2018-06-08 16:09:36 +0200 | [diff] [blame] | 3059 | ret = mbedtls_rsa_pkcs1_encrypt( rsa, |
| 3060 | mbedtls_ctr_drbg_random, |
| 3061 | &global_data.ctr_drbg, |
| 3062 | MBEDTLS_RSA_PUBLIC, |
| 3063 | input_length, |
| 3064 | input, |
| 3065 | output ); |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3066 | } |
| 3067 | else |
| 3068 | #endif /* MBEDTLS_PKCS1_V15 */ |
| 3069 | #if defined(MBEDTLS_PKCS1_V21) |
Gilles Peskine | 55bf3d1 | 2018-06-26 15:53:48 +0200 | [diff] [blame] | 3070 | if( PSA_ALG_IS_RSA_OAEP( alg ) ) |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3071 | { |
Gilles Peskine | 072ac56 | 2018-06-30 00:21:29 +0200 | [diff] [blame] | 3072 | psa_rsa_oaep_set_padding_mode( alg, rsa ); |
| 3073 | ret = mbedtls_rsa_rsaes_oaep_encrypt( rsa, |
| 3074 | mbedtls_ctr_drbg_random, |
| 3075 | &global_data.ctr_drbg, |
| 3076 | MBEDTLS_RSA_PUBLIC, |
| 3077 | salt, salt_length, |
| 3078 | input_length, |
| 3079 | input, |
| 3080 | output ); |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3081 | } |
| 3082 | else |
| 3083 | #endif /* MBEDTLS_PKCS1_V21 */ |
| 3084 | { |
| 3085 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 3086 | } |
| 3087 | if( ret == 0 ) |
Gilles Peskine | 630a18a | 2018-06-29 17:49:35 +0200 | [diff] [blame] | 3088 | *output_length = mbedtls_rsa_get_len( rsa ); |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3089 | return( mbedtls_to_psa_error( ret ) ); |
| 3090 | } |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3091 | else |
Gilles Peskine | b75e4f1 | 2018-06-08 17:44:47 +0200 | [diff] [blame] | 3092 | #endif /* defined(MBEDTLS_RSA_C) */ |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3093 | { |
| 3094 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 3095 | } |
Gilles Peskine | 5b051bc | 2018-05-31 13:25:48 +0200 | [diff] [blame] | 3096 | } |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3097 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3098 | psa_status_t psa_asymmetric_decrypt( psa_key_handle_t handle, |
Gilles Peskine | 61b91d4 | 2018-06-08 16:09:36 +0200 | [diff] [blame] | 3099 | psa_algorithm_t alg, |
| 3100 | const uint8_t *input, |
| 3101 | size_t input_length, |
| 3102 | const uint8_t *salt, |
| 3103 | size_t salt_length, |
| 3104 | uint8_t *output, |
| 3105 | size_t output_size, |
| 3106 | size_t *output_length ) |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3107 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 3108 | psa_key_slot_t *slot; |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3109 | psa_status_t status; |
| 3110 | |
Darryl Green | 5cc689a | 2018-07-24 15:34:10 +0100 | [diff] [blame] | 3111 | (void) input; |
| 3112 | (void) input_length; |
| 3113 | (void) salt; |
| 3114 | (void) output; |
| 3115 | (void) output_size; |
| 3116 | |
Nir Sonnenschein | ca466c8 | 2018-06-04 16:43:12 +0300 | [diff] [blame] | 3117 | *output_length = 0; |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3118 | |
Gilles Peskine | b3fc05d | 2018-06-30 19:04:35 +0200 | [diff] [blame] | 3119 | if( ! PSA_ALG_IS_RSA_OAEP( alg ) && salt_length != 0 ) |
| 3120 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 3121 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3122 | status = psa_get_key_from_slot( handle, &slot, PSA_KEY_USAGE_DECRYPT, alg ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3123 | if( status != PSA_SUCCESS ) |
| 3124 | return( status ); |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3125 | if( ! PSA_KEY_TYPE_IS_KEYPAIR( slot->type ) ) |
| 3126 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 3127 | |
| 3128 | #if defined(MBEDTLS_RSA_C) |
| 3129 | if( slot->type == PSA_KEY_TYPE_RSA_KEYPAIR ) |
| 3130 | { |
| 3131 | mbedtls_rsa_context *rsa = slot->data.rsa; |
| 3132 | int ret; |
| 3133 | |
Gilles Peskine | 630a18a | 2018-06-29 17:49:35 +0200 | [diff] [blame] | 3134 | if( input_length != mbedtls_rsa_get_len( rsa ) ) |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3135 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 3136 | |
| 3137 | #if defined(MBEDTLS_PKCS1_V15) |
Gilles Peskine | 6afe789 | 2018-05-31 13:16:08 +0200 | [diff] [blame] | 3138 | if( alg == PSA_ALG_RSA_PKCS1V15_CRYPT ) |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3139 | { |
Gilles Peskine | 61b91d4 | 2018-06-08 16:09:36 +0200 | [diff] [blame] | 3140 | ret = mbedtls_rsa_pkcs1_decrypt( rsa, |
| 3141 | mbedtls_ctr_drbg_random, |
| 3142 | &global_data.ctr_drbg, |
| 3143 | MBEDTLS_RSA_PRIVATE, |
| 3144 | output_length, |
| 3145 | input, |
| 3146 | output, |
| 3147 | output_size ); |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3148 | } |
| 3149 | else |
| 3150 | #endif /* MBEDTLS_PKCS1_V15 */ |
| 3151 | #if defined(MBEDTLS_PKCS1_V21) |
Gilles Peskine | 55bf3d1 | 2018-06-26 15:53:48 +0200 | [diff] [blame] | 3152 | if( PSA_ALG_IS_RSA_OAEP( alg ) ) |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3153 | { |
Gilles Peskine | 072ac56 | 2018-06-30 00:21:29 +0200 | [diff] [blame] | 3154 | psa_rsa_oaep_set_padding_mode( alg, rsa ); |
| 3155 | ret = mbedtls_rsa_rsaes_oaep_decrypt( rsa, |
| 3156 | mbedtls_ctr_drbg_random, |
| 3157 | &global_data.ctr_drbg, |
| 3158 | MBEDTLS_RSA_PRIVATE, |
| 3159 | salt, salt_length, |
| 3160 | output_length, |
| 3161 | input, |
| 3162 | output, |
| 3163 | output_size ); |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3164 | } |
| 3165 | else |
| 3166 | #endif /* MBEDTLS_PKCS1_V21 */ |
| 3167 | { |
| 3168 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 3169 | } |
Nir Sonnenschein | 717a040 | 2018-06-04 16:36:15 +0300 | [diff] [blame] | 3170 | |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3171 | return( mbedtls_to_psa_error( ret ) ); |
| 3172 | } |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3173 | else |
Gilles Peskine | b75e4f1 | 2018-06-08 17:44:47 +0200 | [diff] [blame] | 3174 | #endif /* defined(MBEDTLS_RSA_C) */ |
Nir Sonnenschein | 39e5914 | 2018-05-02 23:16:26 +0300 | [diff] [blame] | 3175 | { |
| 3176 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 3177 | } |
Gilles Peskine | 5b051bc | 2018-05-31 13:25:48 +0200 | [diff] [blame] | 3178 | } |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 3179 | |
Gilles Peskine | 7bcfc0a | 2018-06-18 21:49:39 +0200 | [diff] [blame] | 3180 | |
| 3181 | |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3182 | /****************************************************************/ |
| 3183 | /* Symmetric cryptography */ |
| 3184 | /****************************************************************/ |
| 3185 | |
Gilles Peskine | 16c0f4f | 2018-06-20 16:05:20 +0200 | [diff] [blame] | 3186 | /* Initialize the cipher operation structure. Once this function has been |
| 3187 | * called, psa_cipher_abort can run and will do the right thing. */ |
| 3188 | static psa_status_t psa_cipher_init( psa_cipher_operation_t *operation, |
| 3189 | psa_algorithm_t alg ) |
| 3190 | { |
Gilles Peskine | c06e071 | 2018-06-20 16:21:04 +0200 | [diff] [blame] | 3191 | if( ! PSA_ALG_IS_CIPHER( alg ) ) |
| 3192 | { |
| 3193 | memset( operation, 0, sizeof( *operation ) ); |
| 3194 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 3195 | } |
| 3196 | |
Gilles Peskine | 16c0f4f | 2018-06-20 16:05:20 +0200 | [diff] [blame] | 3197 | operation->alg = alg; |
| 3198 | operation->key_set = 0; |
| 3199 | operation->iv_set = 0; |
| 3200 | operation->iv_required = 1; |
| 3201 | operation->iv_size = 0; |
| 3202 | operation->block_size = 0; |
| 3203 | mbedtls_cipher_init( &operation->ctx.cipher ); |
| 3204 | return( PSA_SUCCESS ); |
| 3205 | } |
| 3206 | |
Gilles Peskine | e553c65 | 2018-06-04 16:22:46 +0200 | [diff] [blame] | 3207 | static psa_status_t psa_cipher_setup( psa_cipher_operation_t *operation, |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3208 | psa_key_handle_t handle, |
Gilles Peskine | 7e92885 | 2018-06-04 16:23:10 +0200 | [diff] [blame] | 3209 | psa_algorithm_t alg, |
| 3210 | mbedtls_operation_t cipher_operation ) |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3211 | { |
Gilles Peskine | 9ab61b6 | 2019-02-25 17:43:14 +0100 | [diff] [blame] | 3212 | int ret = 0; |
| 3213 | psa_status_t status = PSA_ERROR_GENERIC_ERROR; |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 3214 | psa_key_slot_t *slot; |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3215 | size_t key_bits; |
| 3216 | const mbedtls_cipher_info_t *cipher_info = NULL; |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3217 | psa_key_usage_t usage = ( cipher_operation == MBEDTLS_ENCRYPT ? |
| 3218 | PSA_KEY_USAGE_ENCRYPT : |
| 3219 | PSA_KEY_USAGE_DECRYPT ); |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3220 | |
Jaeden Amero | 36ee5d0 | 2019-02-19 09:25:10 +0000 | [diff] [blame] | 3221 | /* A context must be freshly initialized before it can be set up. */ |
| 3222 | if( operation->alg != 0 ) |
| 3223 | { |
| 3224 | return( PSA_ERROR_BAD_STATE ); |
| 3225 | } |
| 3226 | |
Gilles Peskine | 16c0f4f | 2018-06-20 16:05:20 +0200 | [diff] [blame] | 3227 | status = psa_cipher_init( operation, alg ); |
| 3228 | if( status != PSA_SUCCESS ) |
| 3229 | return( status ); |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3230 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3231 | status = psa_get_key_from_slot( handle, &slot, usage, alg); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3232 | if( status != PSA_SUCCESS ) |
Gilles Peskine | 9ab61b6 | 2019-02-25 17:43:14 +0100 | [diff] [blame] | 3233 | goto exit; |
Gilles Peskine | db4b3ab | 2019-04-18 12:53:01 +0200 | [diff] [blame] | 3234 | key_bits = psa_get_key_slot_bits( slot ); |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3235 | |
Gilles Peskine | ab1d7ab | 2018-07-06 16:07:47 +0200 | [diff] [blame] | 3236 | cipher_info = mbedtls_cipher_info_from_psa( alg, slot->type, key_bits, NULL ); |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3237 | if( cipher_info == NULL ) |
Gilles Peskine | 9ab61b6 | 2019-02-25 17:43:14 +0100 | [diff] [blame] | 3238 | { |
| 3239 | status = PSA_ERROR_NOT_SUPPORTED; |
| 3240 | goto exit; |
| 3241 | } |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3242 | |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3243 | ret = mbedtls_cipher_setup( &operation->ctx.cipher, cipher_info ); |
Moran Peker | 41deec4 | 2018-04-04 15:43:05 +0300 | [diff] [blame] | 3244 | if( ret != 0 ) |
Gilles Peskine | 9ab61b6 | 2019-02-25 17:43:14 +0100 | [diff] [blame] | 3245 | goto exit; |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3246 | |
Gilles Peskine | 9ad29e2 | 2018-06-21 09:40:04 +0200 | [diff] [blame] | 3247 | #if defined(MBEDTLS_DES_C) |
Gilles Peskine | ab1d7ab | 2018-07-06 16:07:47 +0200 | [diff] [blame] | 3248 | if( slot->type == PSA_KEY_TYPE_DES && key_bits == 128 ) |
Gilles Peskine | 9ad29e2 | 2018-06-21 09:40:04 +0200 | [diff] [blame] | 3249 | { |
| 3250 | /* Two-key Triple-DES is 3-key Triple-DES with K1=K3 */ |
| 3251 | unsigned char keys[24]; |
| 3252 | memcpy( keys, slot->data.raw.data, 16 ); |
| 3253 | memcpy( keys + 16, slot->data.raw.data, 8 ); |
| 3254 | ret = mbedtls_cipher_setkey( &operation->ctx.cipher, |
| 3255 | keys, |
| 3256 | 192, cipher_operation ); |
| 3257 | } |
| 3258 | else |
| 3259 | #endif |
| 3260 | { |
| 3261 | ret = mbedtls_cipher_setkey( &operation->ctx.cipher, |
| 3262 | slot->data.raw.data, |
Jaeden Amero | 23bbb75 | 2018-06-26 14:16:54 +0100 | [diff] [blame] | 3263 | (int) key_bits, cipher_operation ); |
Gilles Peskine | 9ad29e2 | 2018-06-21 09:40:04 +0200 | [diff] [blame] | 3264 | } |
Moran Peker | 41deec4 | 2018-04-04 15:43:05 +0300 | [diff] [blame] | 3265 | if( ret != 0 ) |
Gilles Peskine | 9ab61b6 | 2019-02-25 17:43:14 +0100 | [diff] [blame] | 3266 | goto exit; |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3267 | |
mohammad1603 | 8481e74 | 2018-03-18 13:57:31 +0200 | [diff] [blame] | 3268 | #if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING) |
Gilles Peskine | daea26f | 2018-08-21 14:02:45 +0200 | [diff] [blame] | 3269 | switch( alg ) |
mohammad1603 | 8481e74 | 2018-03-18 13:57:31 +0200 | [diff] [blame] | 3270 | { |
Gilles Peskine | daea26f | 2018-08-21 14:02:45 +0200 | [diff] [blame] | 3271 | case PSA_ALG_CBC_NO_PADDING: |
| 3272 | ret = mbedtls_cipher_set_padding_mode( &operation->ctx.cipher, |
| 3273 | MBEDTLS_PADDING_NONE ); |
| 3274 | break; |
| 3275 | case PSA_ALG_CBC_PKCS7: |
| 3276 | ret = mbedtls_cipher_set_padding_mode( &operation->ctx.cipher, |
| 3277 | MBEDTLS_PADDING_PKCS7 ); |
| 3278 | break; |
| 3279 | default: |
| 3280 | /* The algorithm doesn't involve padding. */ |
| 3281 | ret = 0; |
| 3282 | break; |
| 3283 | } |
| 3284 | if( ret != 0 ) |
Gilles Peskine | 9ab61b6 | 2019-02-25 17:43:14 +0100 | [diff] [blame] | 3285 | goto exit; |
mohammad1603 | 8481e74 | 2018-03-18 13:57:31 +0200 | [diff] [blame] | 3286 | #endif //MBEDTLS_CIPHER_MODE_WITH_PADDING |
| 3287 | |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3288 | operation->key_set = 1; |
Gilles Peskine | daea26f | 2018-08-21 14:02:45 +0200 | [diff] [blame] | 3289 | operation->block_size = ( PSA_ALG_IS_STREAM_CIPHER( alg ) ? 1 : |
| 3290 | PSA_BLOCK_CIPHER_BLOCK_SIZE( slot->type ) ); |
| 3291 | if( alg & PSA_ALG_CIPHER_FROM_BLOCK_FLAG ) |
mohammad1603 | 8481e74 | 2018-03-18 13:57:31 +0200 | [diff] [blame] | 3292 | { |
Gilles Peskine | ab1d7ab | 2018-07-06 16:07:47 +0200 | [diff] [blame] | 3293 | operation->iv_size = PSA_BLOCK_CIPHER_BLOCK_SIZE( slot->type ); |
mohammad1603 | 8481e74 | 2018-03-18 13:57:31 +0200 | [diff] [blame] | 3294 | } |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3295 | |
Gilles Peskine | 9ab61b6 | 2019-02-25 17:43:14 +0100 | [diff] [blame] | 3296 | exit: |
| 3297 | if( status == 0 ) |
| 3298 | status = mbedtls_to_psa_error( ret ); |
| 3299 | if( status != 0 ) |
| 3300 | psa_cipher_abort( operation ); |
| 3301 | return( status ); |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3302 | } |
| 3303 | |
Gilles Peskine | fe11951 | 2018-07-08 21:39:34 +0200 | [diff] [blame] | 3304 | psa_status_t psa_cipher_encrypt_setup( psa_cipher_operation_t *operation, |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3305 | psa_key_handle_t handle, |
Gilles Peskine | fe11951 | 2018-07-08 21:39:34 +0200 | [diff] [blame] | 3306 | psa_algorithm_t alg ) |
mohammad1603 | 8481e74 | 2018-03-18 13:57:31 +0200 | [diff] [blame] | 3307 | { |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3308 | return( psa_cipher_setup( operation, handle, alg, MBEDTLS_ENCRYPT ) ); |
mohammad1603 | 8481e74 | 2018-03-18 13:57:31 +0200 | [diff] [blame] | 3309 | } |
| 3310 | |
Gilles Peskine | fe11951 | 2018-07-08 21:39:34 +0200 | [diff] [blame] | 3311 | psa_status_t psa_cipher_decrypt_setup( psa_cipher_operation_t *operation, |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3312 | psa_key_handle_t handle, |
Gilles Peskine | fe11951 | 2018-07-08 21:39:34 +0200 | [diff] [blame] | 3313 | psa_algorithm_t alg ) |
mohammad1603 | 8481e74 | 2018-03-18 13:57:31 +0200 | [diff] [blame] | 3314 | { |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3315 | return( psa_cipher_setup( operation, handle, alg, MBEDTLS_DECRYPT ) ); |
mohammad1603 | 8481e74 | 2018-03-18 13:57:31 +0200 | [diff] [blame] | 3316 | } |
| 3317 | |
Gilles Peskine | fe11951 | 2018-07-08 21:39:34 +0200 | [diff] [blame] | 3318 | psa_status_t psa_cipher_generate_iv( psa_cipher_operation_t *operation, |
| 3319 | unsigned char *iv, |
| 3320 | size_t iv_size, |
| 3321 | size_t *iv_length ) |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3322 | { |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3323 | psa_status_t status; |
| 3324 | int ret; |
Gilles Peskine | c1bb6c8 | 2018-06-18 16:04:39 +0200 | [diff] [blame] | 3325 | if( operation->iv_set || ! operation->iv_required ) |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3326 | { |
Jaeden Amero | e236c2a | 2019-02-20 15:37:15 +0000 | [diff] [blame] | 3327 | return( PSA_ERROR_BAD_STATE ); |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3328 | } |
Moran Peker | 41deec4 | 2018-04-04 15:43:05 +0300 | [diff] [blame] | 3329 | if( iv_size < operation->iv_size ) |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3330 | { |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3331 | status = PSA_ERROR_BUFFER_TOO_SMALL; |
Moran Peker | 41deec4 | 2018-04-04 15:43:05 +0300 | [diff] [blame] | 3332 | goto exit; |
| 3333 | } |
Gilles Peskine | 7e92885 | 2018-06-04 16:23:10 +0200 | [diff] [blame] | 3334 | ret = mbedtls_ctr_drbg_random( &global_data.ctr_drbg, |
| 3335 | iv, operation->iv_size ); |
Moran Peker | 41deec4 | 2018-04-04 15:43:05 +0300 | [diff] [blame] | 3336 | if( ret != 0 ) |
| 3337 | { |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3338 | status = mbedtls_to_psa_error( ret ); |
Gilles Peskine | e553c65 | 2018-06-04 16:22:46 +0200 | [diff] [blame] | 3339 | goto exit; |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3340 | } |
Gilles Peskine | e553c65 | 2018-06-04 16:22:46 +0200 | [diff] [blame] | 3341 | |
mohammad1603 | 8481e74 | 2018-03-18 13:57:31 +0200 | [diff] [blame] | 3342 | *iv_length = operation->iv_size; |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3343 | status = psa_cipher_set_iv( operation, iv, *iv_length ); |
Moran Peker | 41deec4 | 2018-04-04 15:43:05 +0300 | [diff] [blame] | 3344 | |
Moran Peker | 395db87 | 2018-05-31 14:07:14 +0300 | [diff] [blame] | 3345 | exit: |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3346 | if( status != PSA_SUCCESS ) |
Moran Peker | 395db87 | 2018-05-31 14:07:14 +0300 | [diff] [blame] | 3347 | psa_cipher_abort( operation ); |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3348 | return( status ); |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3349 | } |
| 3350 | |
Gilles Peskine | fe11951 | 2018-07-08 21:39:34 +0200 | [diff] [blame] | 3351 | psa_status_t psa_cipher_set_iv( psa_cipher_operation_t *operation, |
| 3352 | const unsigned char *iv, |
| 3353 | size_t iv_length ) |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3354 | { |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3355 | psa_status_t status; |
| 3356 | int ret; |
Gilles Peskine | c1bb6c8 | 2018-06-18 16:04:39 +0200 | [diff] [blame] | 3357 | if( operation->iv_set || ! operation->iv_required ) |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3358 | { |
Jaeden Amero | e236c2a | 2019-02-20 15:37:15 +0000 | [diff] [blame] | 3359 | return( PSA_ERROR_BAD_STATE ); |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3360 | } |
Moran Peker | a28258c | 2018-05-29 16:25:04 +0300 | [diff] [blame] | 3361 | if( iv_length != operation->iv_size ) |
Moran Peker | 71f19ae | 2018-04-22 20:23:16 +0300 | [diff] [blame] | 3362 | { |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3363 | status = PSA_ERROR_INVALID_ARGUMENT; |
| 3364 | goto exit; |
Moran Peker | 71f19ae | 2018-04-22 20:23:16 +0300 | [diff] [blame] | 3365 | } |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3366 | ret = mbedtls_cipher_set_iv( &operation->ctx.cipher, iv, iv_length ); |
| 3367 | status = mbedtls_to_psa_error( ret ); |
| 3368 | exit: |
| 3369 | if( status == PSA_SUCCESS ) |
| 3370 | operation->iv_set = 1; |
| 3371 | else |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3372 | psa_cipher_abort( operation ); |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3373 | return( status ); |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3374 | } |
| 3375 | |
Gilles Peskine | e553c65 | 2018-06-04 16:22:46 +0200 | [diff] [blame] | 3376 | psa_status_t psa_cipher_update( psa_cipher_operation_t *operation, |
| 3377 | const uint8_t *input, |
| 3378 | size_t input_length, |
| 3379 | unsigned char *output, |
| 3380 | size_t output_size, |
| 3381 | size_t *output_length ) |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3382 | { |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3383 | psa_status_t status; |
| 3384 | int ret; |
Gilles Peskine | 89d789c | 2018-06-04 17:17:16 +0200 | [diff] [blame] | 3385 | size_t expected_output_size; |
Jaeden Amero | ab43997 | 2019-02-15 14:12:05 +0000 | [diff] [blame] | 3386 | |
| 3387 | if( operation->alg == 0 ) |
| 3388 | { |
| 3389 | return( PSA_ERROR_BAD_STATE ); |
| 3390 | } |
| 3391 | |
Gilles Peskine | daea26f | 2018-08-21 14:02:45 +0200 | [diff] [blame] | 3392 | if( ! PSA_ALG_IS_STREAM_CIPHER( operation->alg ) ) |
Gilles Peskine | 89d789c | 2018-06-04 17:17:16 +0200 | [diff] [blame] | 3393 | { |
| 3394 | /* Take the unprocessed partial block left over from previous |
| 3395 | * update calls, if any, plus the input to this call. Remove |
| 3396 | * the last partial block, if any. You get the data that will be |
| 3397 | * output in this call. */ |
| 3398 | expected_output_size = |
| 3399 | ( operation->ctx.cipher.unprocessed_len + input_length ) |
| 3400 | / operation->block_size * operation->block_size; |
| 3401 | } |
| 3402 | else |
| 3403 | { |
| 3404 | expected_output_size = input_length; |
| 3405 | } |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3406 | |
Gilles Peskine | 89d789c | 2018-06-04 17:17:16 +0200 | [diff] [blame] | 3407 | if( output_size < expected_output_size ) |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3408 | { |
| 3409 | status = PSA_ERROR_BUFFER_TOO_SMALL; |
| 3410 | goto exit; |
| 3411 | } |
mohammad1603 | 8275961 | 2018-03-12 18:16:40 +0200 | [diff] [blame] | 3412 | |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3413 | ret = mbedtls_cipher_update( &operation->ctx.cipher, input, |
Gilles Peskine | e553c65 | 2018-06-04 16:22:46 +0200 | [diff] [blame] | 3414 | input_length, output, output_length ); |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3415 | status = mbedtls_to_psa_error( ret ); |
| 3416 | exit: |
| 3417 | if( status != PSA_SUCCESS ) |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3418 | psa_cipher_abort( operation ); |
itayzafrir | 534bd7c | 2018-08-02 13:56:32 +0300 | [diff] [blame] | 3419 | return( status ); |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3420 | } |
| 3421 | |
Gilles Peskine | e553c65 | 2018-06-04 16:22:46 +0200 | [diff] [blame] | 3422 | psa_status_t psa_cipher_finish( psa_cipher_operation_t *operation, |
| 3423 | uint8_t *output, |
| 3424 | size_t output_size, |
| 3425 | size_t *output_length ) |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3426 | { |
David Saada | b4ecc27 | 2019-02-14 13:48:10 +0200 | [diff] [blame] | 3427 | psa_status_t status = PSA_ERROR_GENERIC_ERROR; |
Janos Follath | 315b51c | 2018-07-09 16:04:51 +0100 | [diff] [blame] | 3428 | int cipher_ret = MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE; |
Gilles Peskine | e553c65 | 2018-06-04 16:22:46 +0200 | [diff] [blame] | 3429 | uint8_t temp_output_buffer[MBEDTLS_MAX_BLOCK_LENGTH]; |
Moran Peker | bed71a2 | 2018-04-22 20:19:20 +0300 | [diff] [blame] | 3430 | |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3431 | if( ! operation->key_set ) |
Moran Peker | dc38ebc | 2018-04-30 15:45:34 +0300 | [diff] [blame] | 3432 | { |
Jaeden Amero | e236c2a | 2019-02-20 15:37:15 +0000 | [diff] [blame] | 3433 | return( PSA_ERROR_BAD_STATE ); |
Moran Peker | 7cb22b8 | 2018-06-05 11:40:02 +0300 | [diff] [blame] | 3434 | } |
| 3435 | if( operation->iv_required && ! operation->iv_set ) |
| 3436 | { |
Jaeden Amero | e236c2a | 2019-02-20 15:37:15 +0000 | [diff] [blame] | 3437 | return( PSA_ERROR_BAD_STATE ); |
Moran Peker | 7cb22b8 | 2018-06-05 11:40:02 +0300 | [diff] [blame] | 3438 | } |
Gilles Peskine | daea26f | 2018-08-21 14:02:45 +0200 | [diff] [blame] | 3439 | |
Gilles Peskine | 2c5219a | 2018-06-06 15:12:32 +0200 | [diff] [blame] | 3440 | if( operation->ctx.cipher.operation == MBEDTLS_ENCRYPT && |
Gilles Peskine | daea26f | 2018-08-21 14:02:45 +0200 | [diff] [blame] | 3441 | operation->alg == PSA_ALG_CBC_NO_PADDING && |
| 3442 | operation->ctx.cipher.unprocessed_len != 0 ) |
Moran Peker | 7cb22b8 | 2018-06-05 11:40:02 +0300 | [diff] [blame] | 3443 | { |
Gilles Peskine | daea26f | 2018-08-21 14:02:45 +0200 | [diff] [blame] | 3444 | status = PSA_ERROR_INVALID_ARGUMENT; |
Janos Follath | 315b51c | 2018-07-09 16:04:51 +0100 | [diff] [blame] | 3445 | goto error; |
Moran Peker | dc38ebc | 2018-04-30 15:45:34 +0300 | [diff] [blame] | 3446 | } |
| 3447 | |
Janos Follath | 315b51c | 2018-07-09 16:04:51 +0100 | [diff] [blame] | 3448 | cipher_ret = mbedtls_cipher_finish( &operation->ctx.cipher, |
| 3449 | temp_output_buffer, |
| 3450 | output_length ); |
| 3451 | if( cipher_ret != 0 ) |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3452 | { |
Janos Follath | 315b51c | 2018-07-09 16:04:51 +0100 | [diff] [blame] | 3453 | status = mbedtls_to_psa_error( cipher_ret ); |
| 3454 | goto error; |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3455 | } |
Janos Follath | 315b51c | 2018-07-09 16:04:51 +0100 | [diff] [blame] | 3456 | |
Gilles Peskine | 46f1fd7 | 2018-06-28 19:31:31 +0200 | [diff] [blame] | 3457 | if( *output_length == 0 ) |
Janos Follath | 315b51c | 2018-07-09 16:04:51 +0100 | [diff] [blame] | 3458 | ; /* Nothing to copy. Note that output may be NULL in this case. */ |
Gilles Peskine | 46f1fd7 | 2018-06-28 19:31:31 +0200 | [diff] [blame] | 3459 | else if( output_size >= *output_length ) |
Moran Peker | dc38ebc | 2018-04-30 15:45:34 +0300 | [diff] [blame] | 3460 | memcpy( output, temp_output_buffer, *output_length ); |
| 3461 | else |
| 3462 | { |
Janos Follath | 315b51c | 2018-07-09 16:04:51 +0100 | [diff] [blame] | 3463 | status = PSA_ERROR_BUFFER_TOO_SMALL; |
| 3464 | goto error; |
Moran Peker | dc38ebc | 2018-04-30 15:45:34 +0300 | [diff] [blame] | 3465 | } |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3466 | |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 3467 | mbedtls_platform_zeroize( temp_output_buffer, sizeof( temp_output_buffer ) ); |
Janos Follath | 315b51c | 2018-07-09 16:04:51 +0100 | [diff] [blame] | 3468 | status = psa_cipher_abort( operation ); |
| 3469 | |
| 3470 | return( status ); |
| 3471 | |
| 3472 | error: |
| 3473 | |
| 3474 | *output_length = 0; |
| 3475 | |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 3476 | mbedtls_platform_zeroize( temp_output_buffer, sizeof( temp_output_buffer ) ); |
Janos Follath | 315b51c | 2018-07-09 16:04:51 +0100 | [diff] [blame] | 3477 | (void) psa_cipher_abort( operation ); |
| 3478 | |
| 3479 | return( status ); |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3480 | } |
| 3481 | |
Gilles Peskine | e553c65 | 2018-06-04 16:22:46 +0200 | [diff] [blame] | 3482 | psa_status_t psa_cipher_abort( psa_cipher_operation_t *operation ) |
| 3483 | { |
Gilles Peskine | 16c0f4f | 2018-06-20 16:05:20 +0200 | [diff] [blame] | 3484 | if( operation->alg == 0 ) |
Gilles Peskine | 8173631 | 2018-06-26 15:04:31 +0200 | [diff] [blame] | 3485 | { |
| 3486 | /* The object has (apparently) been initialized but it is not |
| 3487 | * in use. It's ok to call abort on such an object, and there's |
| 3488 | * nothing to do. */ |
Gilles Peskine | 16c0f4f | 2018-06-20 16:05:20 +0200 | [diff] [blame] | 3489 | return( PSA_SUCCESS ); |
Gilles Peskine | 8173631 | 2018-06-26 15:04:31 +0200 | [diff] [blame] | 3490 | } |
Gilles Peskine | 16c0f4f | 2018-06-20 16:05:20 +0200 | [diff] [blame] | 3491 | |
Gilles Peskine | f9c2c09 | 2018-06-21 16:57:07 +0200 | [diff] [blame] | 3492 | /* Sanity check (shouldn't happen: operation->alg should |
| 3493 | * always have been initialized to a valid value). */ |
| 3494 | if( ! PSA_ALG_IS_CIPHER( operation->alg ) ) |
| 3495 | return( PSA_ERROR_BAD_STATE ); |
| 3496 | |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3497 | mbedtls_cipher_free( &operation->ctx.cipher ); |
Gilles Peskine | e553c65 | 2018-06-04 16:22:46 +0200 | [diff] [blame] | 3498 | |
Moran Peker | 41deec4 | 2018-04-04 15:43:05 +0300 | [diff] [blame] | 3499 | operation->alg = 0; |
Moran Peker | ad9d82c | 2018-04-30 12:31:04 +0300 | [diff] [blame] | 3500 | operation->key_set = 0; |
| 3501 | operation->iv_set = 0; |
| 3502 | operation->iv_size = 0; |
Moran Peker | 41deec4 | 2018-04-04 15:43:05 +0300 | [diff] [blame] | 3503 | operation->block_size = 0; |
Moran Peker | ad9d82c | 2018-04-30 12:31:04 +0300 | [diff] [blame] | 3504 | operation->iv_required = 0; |
Moran Peker | 41deec4 | 2018-04-04 15:43:05 +0300 | [diff] [blame] | 3505 | |
Moran Peker | 395db87 | 2018-05-31 14:07:14 +0300 | [diff] [blame] | 3506 | return( PSA_SUCCESS ); |
mohammad1603 | 503973b | 2018-03-12 15:59:30 +0200 | [diff] [blame] | 3507 | } |
| 3508 | |
Gilles Peskine | a0655c3 | 2018-04-30 17:06:50 +0200 | [diff] [blame] | 3509 | |
Gilles Peskine | 7bcfc0a | 2018-06-18 21:49:39 +0200 | [diff] [blame] | 3510 | |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3511 | /****************************************************************/ |
| 3512 | /* Key Policy */ |
| 3513 | /****************************************************************/ |
Mohammad Abo Mokh | a5c7b7d | 2018-07-04 15:57:00 +0300 | [diff] [blame] | 3514 | |
mohammad1603 | 2701005 | 2018-07-03 13:16:15 +0300 | [diff] [blame] | 3515 | #if !defined(MBEDTLS_PSA_CRYPTO_SPM) |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 3516 | void psa_key_policy_set_usage( psa_key_policy_t *policy, |
| 3517 | psa_key_usage_t usage, |
| 3518 | psa_algorithm_t alg ) |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3519 | { |
mohammad1603 | 4eed757 | 2018-03-28 05:14:59 -0700 | [diff] [blame] | 3520 | policy->usage = usage; |
| 3521 | policy->alg = alg; |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3522 | } |
| 3523 | |
Gilles Peskine | aa7bc47 | 2018-07-12 00:54:56 +0200 | [diff] [blame] | 3524 | psa_key_usage_t psa_key_policy_get_usage( const psa_key_policy_t *policy ) |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3525 | { |
mohammad1603 | 6df908f | 2018-04-02 08:34:15 -0700 | [diff] [blame] | 3526 | return( policy->usage ); |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3527 | } |
| 3528 | |
Gilles Peskine | aa7bc47 | 2018-07-12 00:54:56 +0200 | [diff] [blame] | 3529 | psa_algorithm_t psa_key_policy_get_algorithm( const psa_key_policy_t *policy ) |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3530 | { |
mohammad1603 | 6df908f | 2018-04-02 08:34:15 -0700 | [diff] [blame] | 3531 | return( policy->alg ); |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3532 | } |
mohammad1603 | 2701005 | 2018-07-03 13:16:15 +0300 | [diff] [blame] | 3533 | #endif /* !defined(MBEDTLS_PSA_CRYPTO_SPM) */ |
Mohammad Abo Mokh | a5c7b7d | 2018-07-04 15:57:00 +0300 | [diff] [blame] | 3534 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3535 | psa_status_t psa_set_key_policy( psa_key_handle_t handle, |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 3536 | const psa_key_policy_t *policy ) |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3537 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 3538 | psa_key_slot_t *slot; |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3539 | psa_status_t status; |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3540 | |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3541 | if( policy == NULL ) |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3542 | return( PSA_ERROR_INVALID_ARGUMENT ); |
Gilles Peskine | 5b051bc | 2018-05-31 13:25:48 +0200 | [diff] [blame] | 3543 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3544 | status = psa_get_empty_key_slot( handle, &slot ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3545 | if( status != PSA_SUCCESS ) |
| 3546 | return( status ); |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3547 | |
Gilles Peskine | 4747d19 | 2019-04-17 15:05:45 +0200 | [diff] [blame] | 3548 | return( psa_set_key_policy_internal( slot, policy ) ); |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3549 | } |
| 3550 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3551 | psa_status_t psa_get_key_policy( psa_key_handle_t handle, |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 3552 | psa_key_policy_t *policy ) |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3553 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 3554 | psa_key_slot_t *slot; |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3555 | psa_status_t status; |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3556 | |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3557 | if( policy == NULL ) |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3558 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 3559 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3560 | status = psa_get_key_slot( handle, &slot ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3561 | if( status != PSA_SUCCESS ) |
| 3562 | return( status ); |
Gilles Peskine | 5b051bc | 2018-05-31 13:25:48 +0200 | [diff] [blame] | 3563 | |
mohammad1603 | 6df908f | 2018-04-02 08:34:15 -0700 | [diff] [blame] | 3564 | *policy = slot->policy; |
mohammad1603 | 8cc1cee | 2018-03-28 01:21:33 +0300 | [diff] [blame] | 3565 | |
| 3566 | return( PSA_SUCCESS ); |
| 3567 | } |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 3568 | |
Gilles Peskine | a0655c3 | 2018-04-30 17:06:50 +0200 | [diff] [blame] | 3569 | |
| 3570 | |
mohammad1603 | 804cd71 | 2018-03-20 22:44:08 +0200 | [diff] [blame] | 3571 | /****************************************************************/ |
| 3572 | /* Key Lifetime */ |
| 3573 | /****************************************************************/ |
| 3574 | |
Gilles Peskine | 87a5e56 | 2019-04-17 12:28:25 +0200 | [diff] [blame] | 3575 | psa_status_t psa_get_key_lifetime_from_handle( psa_key_handle_t handle, |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 3576 | psa_key_lifetime_t *lifetime ) |
mohammad1603 | 804cd71 | 2018-03-20 22:44:08 +0200 | [diff] [blame] | 3577 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 3578 | psa_key_slot_t *slot; |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3579 | psa_status_t status; |
mohammad1603 | 804cd71 | 2018-03-20 22:44:08 +0200 | [diff] [blame] | 3580 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3581 | status = psa_get_key_slot( handle, &slot ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3582 | if( status != PSA_SUCCESS ) |
| 3583 | return( status ); |
Gilles Peskine | 5b051bc | 2018-05-31 13:25:48 +0200 | [diff] [blame] | 3584 | |
mohammad1603 | 804cd71 | 2018-03-20 22:44:08 +0200 | [diff] [blame] | 3585 | *lifetime = slot->lifetime; |
| 3586 | |
| 3587 | return( PSA_SUCCESS ); |
| 3588 | } |
| 3589 | |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 3590 | |
Gilles Peskine | 7bcfc0a | 2018-06-18 21:49:39 +0200 | [diff] [blame] | 3591 | |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3592 | /****************************************************************/ |
| 3593 | /* AEAD */ |
| 3594 | /****************************************************************/ |
Gilles Peskine | 7bcfc0a | 2018-06-18 21:49:39 +0200 | [diff] [blame] | 3595 | |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3596 | typedef struct |
| 3597 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 3598 | psa_key_slot_t *slot; |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3599 | const mbedtls_cipher_info_t *cipher_info; |
| 3600 | union |
| 3601 | { |
| 3602 | #if defined(MBEDTLS_CCM_C) |
| 3603 | mbedtls_ccm_context ccm; |
| 3604 | #endif /* MBEDTLS_CCM_C */ |
| 3605 | #if defined(MBEDTLS_GCM_C) |
| 3606 | mbedtls_gcm_context gcm; |
| 3607 | #endif /* MBEDTLS_GCM_C */ |
| 3608 | } ctx; |
Gilles Peskine | 23cc2ff | 2018-08-17 19:47:52 +0200 | [diff] [blame] | 3609 | psa_algorithm_t core_alg; |
| 3610 | uint8_t full_tag_length; |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3611 | uint8_t tag_length; |
| 3612 | } aead_operation_t; |
| 3613 | |
Gilles Peskine | 30a9e41 | 2019-01-14 18:36:12 +0100 | [diff] [blame] | 3614 | static void psa_aead_abort_internal( aead_operation_t *operation ) |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3615 | { |
Gilles Peskine | f8a8fe6 | 2018-08-21 16:38:05 +0200 | [diff] [blame] | 3616 | switch( operation->core_alg ) |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3617 | { |
| 3618 | #if defined(MBEDTLS_CCM_C) |
| 3619 | case PSA_ALG_CCM: |
| 3620 | mbedtls_ccm_free( &operation->ctx.ccm ); |
| 3621 | break; |
| 3622 | #endif /* MBEDTLS_CCM_C */ |
Gilles Peskine | b0b189f | 2018-11-28 17:30:58 +0100 | [diff] [blame] | 3623 | #if defined(MBEDTLS_GCM_C) |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3624 | case PSA_ALG_GCM: |
| 3625 | mbedtls_gcm_free( &operation->ctx.gcm ); |
| 3626 | break; |
| 3627 | #endif /* MBEDTLS_GCM_C */ |
| 3628 | } |
| 3629 | } |
| 3630 | |
| 3631 | static psa_status_t psa_aead_setup( aead_operation_t *operation, |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3632 | psa_key_handle_t handle, |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3633 | psa_key_usage_t usage, |
| 3634 | psa_algorithm_t alg ) |
| 3635 | { |
| 3636 | psa_status_t status; |
| 3637 | size_t key_bits; |
| 3638 | mbedtls_cipher_id_t cipher_id; |
| 3639 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3640 | status = psa_get_key_from_slot( handle, &operation->slot, usage, alg ); |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3641 | if( status != PSA_SUCCESS ) |
| 3642 | return( status ); |
| 3643 | |
Gilles Peskine | db4b3ab | 2019-04-18 12:53:01 +0200 | [diff] [blame] | 3644 | key_bits = psa_get_key_slot_bits( operation->slot ); |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3645 | |
| 3646 | operation->cipher_info = |
| 3647 | mbedtls_cipher_info_from_psa( alg, operation->slot->type, key_bits, |
| 3648 | &cipher_id ); |
| 3649 | if( operation->cipher_info == NULL ) |
| 3650 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 3651 | |
Gilles Peskine | 23cc2ff | 2018-08-17 19:47:52 +0200 | [diff] [blame] | 3652 | switch( PSA_ALG_AEAD_WITH_TAG_LENGTH( alg, 0 ) ) |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3653 | { |
| 3654 | #if defined(MBEDTLS_CCM_C) |
Gilles Peskine | 23cc2ff | 2018-08-17 19:47:52 +0200 | [diff] [blame] | 3655 | case PSA_ALG_AEAD_WITH_TAG_LENGTH( PSA_ALG_CCM, 0 ): |
| 3656 | operation->core_alg = PSA_ALG_CCM; |
| 3657 | operation->full_tag_length = 16; |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3658 | if( PSA_BLOCK_CIPHER_BLOCK_SIZE( operation->slot->type ) != 16 ) |
| 3659 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 3660 | mbedtls_ccm_init( &operation->ctx.ccm ); |
| 3661 | status = mbedtls_to_psa_error( |
| 3662 | mbedtls_ccm_setkey( &operation->ctx.ccm, cipher_id, |
| 3663 | operation->slot->data.raw.data, |
| 3664 | (unsigned int) key_bits ) ); |
| 3665 | if( status != 0 ) |
| 3666 | goto cleanup; |
| 3667 | break; |
| 3668 | #endif /* MBEDTLS_CCM_C */ |
| 3669 | |
| 3670 | #if defined(MBEDTLS_GCM_C) |
Gilles Peskine | 23cc2ff | 2018-08-17 19:47:52 +0200 | [diff] [blame] | 3671 | case PSA_ALG_AEAD_WITH_TAG_LENGTH( PSA_ALG_GCM, 0 ): |
| 3672 | operation->core_alg = PSA_ALG_GCM; |
| 3673 | operation->full_tag_length = 16; |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3674 | if( PSA_BLOCK_CIPHER_BLOCK_SIZE( operation->slot->type ) != 16 ) |
| 3675 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 3676 | mbedtls_gcm_init( &operation->ctx.gcm ); |
| 3677 | status = mbedtls_to_psa_error( |
| 3678 | mbedtls_gcm_setkey( &operation->ctx.gcm, cipher_id, |
| 3679 | operation->slot->data.raw.data, |
| 3680 | (unsigned int) key_bits ) ); |
| 3681 | break; |
| 3682 | #endif /* MBEDTLS_GCM_C */ |
| 3683 | |
| 3684 | default: |
| 3685 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 3686 | } |
| 3687 | |
Gilles Peskine | 23cc2ff | 2018-08-17 19:47:52 +0200 | [diff] [blame] | 3688 | if( PSA_AEAD_TAG_LENGTH( alg ) > operation->full_tag_length ) |
| 3689 | { |
| 3690 | status = PSA_ERROR_INVALID_ARGUMENT; |
| 3691 | goto cleanup; |
| 3692 | } |
| 3693 | operation->tag_length = PSA_AEAD_TAG_LENGTH( alg ); |
| 3694 | /* CCM allows the following tag lengths: 4, 6, 8, 10, 12, 14, 16. |
| 3695 | * GCM allows the following tag lengths: 4, 8, 12, 13, 14, 15, 16. |
| 3696 | * In both cases, mbedtls_xxx will validate the tag length below. */ |
| 3697 | |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3698 | return( PSA_SUCCESS ); |
| 3699 | |
| 3700 | cleanup: |
Gilles Peskine | 30a9e41 | 2019-01-14 18:36:12 +0100 | [diff] [blame] | 3701 | psa_aead_abort_internal( operation ); |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3702 | return( status ); |
| 3703 | } |
| 3704 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3705 | psa_status_t psa_aead_encrypt( psa_key_handle_t handle, |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3706 | psa_algorithm_t alg, |
| 3707 | const uint8_t *nonce, |
| 3708 | size_t nonce_length, |
| 3709 | const uint8_t *additional_data, |
| 3710 | size_t additional_data_length, |
| 3711 | const uint8_t *plaintext, |
| 3712 | size_t plaintext_length, |
| 3713 | uint8_t *ciphertext, |
| 3714 | size_t ciphertext_size, |
| 3715 | size_t *ciphertext_length ) |
| 3716 | { |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3717 | psa_status_t status; |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3718 | aead_operation_t operation; |
mohammad1603 | 15223a8 | 2018-06-03 17:19:55 +0300 | [diff] [blame] | 3719 | uint8_t *tag; |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 3720 | |
mohammad1603 | f08a550 | 2018-06-03 15:05:47 +0300 | [diff] [blame] | 3721 | *ciphertext_length = 0; |
mohammad1603 | e58e684 | 2018-05-09 04:58:32 -0700 | [diff] [blame] | 3722 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3723 | status = psa_aead_setup( &operation, handle, PSA_KEY_USAGE_ENCRYPT, alg ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3724 | if( status != PSA_SUCCESS ) |
| 3725 | return( status ); |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3726 | |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3727 | /* For all currently supported modes, the tag is at the end of the |
| 3728 | * ciphertext. */ |
| 3729 | if( ciphertext_size < ( plaintext_length + operation.tag_length ) ) |
| 3730 | { |
| 3731 | status = PSA_ERROR_BUFFER_TOO_SMALL; |
| 3732 | goto exit; |
| 3733 | } |
| 3734 | tag = ciphertext + plaintext_length; |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3735 | |
Gilles Peskine | b0b189f | 2018-11-28 17:30:58 +0100 | [diff] [blame] | 3736 | #if defined(MBEDTLS_GCM_C) |
Gilles Peskine | 23cc2ff | 2018-08-17 19:47:52 +0200 | [diff] [blame] | 3737 | if( operation.core_alg == PSA_ALG_GCM ) |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3738 | { |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3739 | status = mbedtls_to_psa_error( |
| 3740 | mbedtls_gcm_crypt_and_tag( &operation.ctx.gcm, |
| 3741 | MBEDTLS_GCM_ENCRYPT, |
| 3742 | plaintext_length, |
| 3743 | nonce, nonce_length, |
| 3744 | additional_data, additional_data_length, |
| 3745 | plaintext, ciphertext, |
| 3746 | operation.tag_length, tag ) ); |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3747 | } |
Gilles Peskine | b0b189f | 2018-11-28 17:30:58 +0100 | [diff] [blame] | 3748 | else |
| 3749 | #endif /* MBEDTLS_GCM_C */ |
| 3750 | #if defined(MBEDTLS_CCM_C) |
| 3751 | if( operation.core_alg == PSA_ALG_CCM ) |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3752 | { |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3753 | status = mbedtls_to_psa_error( |
| 3754 | mbedtls_ccm_encrypt_and_tag( &operation.ctx.ccm, |
| 3755 | plaintext_length, |
| 3756 | nonce, nonce_length, |
| 3757 | additional_data, |
| 3758 | additional_data_length, |
| 3759 | plaintext, ciphertext, |
| 3760 | tag, operation.tag_length ) ); |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3761 | } |
mohammad1603 | 5c8845f | 2018-05-09 05:40:09 -0700 | [diff] [blame] | 3762 | else |
Gilles Peskine | b0b189f | 2018-11-28 17:30:58 +0100 | [diff] [blame] | 3763 | #endif /* MBEDTLS_CCM_C */ |
mohammad1603 | 5c8845f | 2018-05-09 05:40:09 -0700 | [diff] [blame] | 3764 | { |
mohammad1603 | 554faad | 2018-06-03 15:07:38 +0300 | [diff] [blame] | 3765 | return( PSA_ERROR_NOT_SUPPORTED ); |
mohammad1603 | 5c8845f | 2018-05-09 05:40:09 -0700 | [diff] [blame] | 3766 | } |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 3767 | |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3768 | if( status != PSA_SUCCESS && ciphertext_size != 0 ) |
| 3769 | memset( ciphertext, 0, ciphertext_size ); |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 3770 | |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3771 | exit: |
Gilles Peskine | 30a9e41 | 2019-01-14 18:36:12 +0100 | [diff] [blame] | 3772 | psa_aead_abort_internal( &operation ); |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3773 | if( status == PSA_SUCCESS ) |
| 3774 | *ciphertext_length = plaintext_length + operation.tag_length; |
| 3775 | return( status ); |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3776 | } |
| 3777 | |
Gilles Peskine | ee652a3 | 2018-06-01 19:23:52 +0200 | [diff] [blame] | 3778 | /* Locate the tag in a ciphertext buffer containing the encrypted data |
| 3779 | * followed by the tag. Return the length of the part preceding the tag in |
| 3780 | * *plaintext_length. This is the size of the plaintext in modes where |
| 3781 | * the encrypted data has the same size as the plaintext, such as |
| 3782 | * CCM and GCM. */ |
| 3783 | static psa_status_t psa_aead_unpadded_locate_tag( size_t tag_length, |
| 3784 | const uint8_t *ciphertext, |
| 3785 | size_t ciphertext_length, |
| 3786 | size_t plaintext_size, |
Gilles Peskine | ee652a3 | 2018-06-01 19:23:52 +0200 | [diff] [blame] | 3787 | const uint8_t **p_tag ) |
| 3788 | { |
| 3789 | size_t payload_length; |
| 3790 | if( tag_length > ciphertext_length ) |
| 3791 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 3792 | payload_length = ciphertext_length - tag_length; |
| 3793 | if( payload_length > plaintext_size ) |
| 3794 | return( PSA_ERROR_BUFFER_TOO_SMALL ); |
| 3795 | *p_tag = ciphertext + payload_length; |
Gilles Peskine | ee652a3 | 2018-06-01 19:23:52 +0200 | [diff] [blame] | 3796 | return( PSA_SUCCESS ); |
| 3797 | } |
| 3798 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3799 | psa_status_t psa_aead_decrypt( psa_key_handle_t handle, |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3800 | psa_algorithm_t alg, |
| 3801 | const uint8_t *nonce, |
| 3802 | size_t nonce_length, |
| 3803 | const uint8_t *additional_data, |
| 3804 | size_t additional_data_length, |
| 3805 | const uint8_t *ciphertext, |
| 3806 | size_t ciphertext_length, |
| 3807 | uint8_t *plaintext, |
| 3808 | size_t plaintext_size, |
| 3809 | size_t *plaintext_length ) |
| 3810 | { |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3811 | psa_status_t status; |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3812 | aead_operation_t operation; |
| 3813 | const uint8_t *tag = NULL; |
Gilles Peskine | 2d27786 | 2018-06-18 15:41:12 +0200 | [diff] [blame] | 3814 | |
Gilles Peskine | ee652a3 | 2018-06-01 19:23:52 +0200 | [diff] [blame] | 3815 | *plaintext_length = 0; |
mohammad1603 | 9e5a515 | 2018-04-26 12:07:35 +0300 | [diff] [blame] | 3816 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 3817 | status = psa_aead_setup( &operation, handle, PSA_KEY_USAGE_DECRYPT, alg ); |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 3818 | if( status != PSA_SUCCESS ) |
| 3819 | return( status ); |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3820 | |
Gilles Peskine | b0b189f | 2018-11-28 17:30:58 +0100 | [diff] [blame] | 3821 | #if defined(MBEDTLS_GCM_C) |
Gilles Peskine | 23cc2ff | 2018-08-17 19:47:52 +0200 | [diff] [blame] | 3822 | if( operation.core_alg == PSA_ALG_GCM ) |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3823 | { |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3824 | status = psa_aead_unpadded_locate_tag( operation.tag_length, |
Gilles Peskine | ee652a3 | 2018-06-01 19:23:52 +0200 | [diff] [blame] | 3825 | ciphertext, ciphertext_length, |
mohammad1603 | 60a64d0 | 2018-06-03 17:20:42 +0300 | [diff] [blame] | 3826 | plaintext_size, &tag ); |
Gilles Peskine | ee652a3 | 2018-06-01 19:23:52 +0200 | [diff] [blame] | 3827 | if( status != PSA_SUCCESS ) |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3828 | goto exit; |
Gilles Peskine | ee652a3 | 2018-06-01 19:23:52 +0200 | [diff] [blame] | 3829 | |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3830 | status = mbedtls_to_psa_error( |
| 3831 | mbedtls_gcm_auth_decrypt( &operation.ctx.gcm, |
| 3832 | ciphertext_length - operation.tag_length, |
| 3833 | nonce, nonce_length, |
| 3834 | additional_data, |
| 3835 | additional_data_length, |
| 3836 | tag, operation.tag_length, |
| 3837 | ciphertext, plaintext ) ); |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3838 | } |
Gilles Peskine | b0b189f | 2018-11-28 17:30:58 +0100 | [diff] [blame] | 3839 | else |
| 3840 | #endif /* MBEDTLS_GCM_C */ |
| 3841 | #if defined(MBEDTLS_CCM_C) |
| 3842 | if( operation.core_alg == PSA_ALG_CCM ) |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3843 | { |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3844 | status = psa_aead_unpadded_locate_tag( operation.tag_length, |
mohammad1603 | 9375f84 | 2018-06-03 14:28:24 +0300 | [diff] [blame] | 3845 | ciphertext, ciphertext_length, |
mohammad1603 | 60a64d0 | 2018-06-03 17:20:42 +0300 | [diff] [blame] | 3846 | plaintext_size, &tag ); |
mohammad1603 | 9375f84 | 2018-06-03 14:28:24 +0300 | [diff] [blame] | 3847 | if( status != PSA_SUCCESS ) |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3848 | goto exit; |
mohammad1603 | 9375f84 | 2018-06-03 14:28:24 +0300 | [diff] [blame] | 3849 | |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3850 | status = mbedtls_to_psa_error( |
| 3851 | mbedtls_ccm_auth_decrypt( &operation.ctx.ccm, |
| 3852 | ciphertext_length - operation.tag_length, |
| 3853 | nonce, nonce_length, |
| 3854 | additional_data, |
| 3855 | additional_data_length, |
| 3856 | ciphertext, plaintext, |
| 3857 | tag, operation.tag_length ) ); |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3858 | } |
mohammad1603 | 3957465 | 2018-06-01 04:39:53 -0700 | [diff] [blame] | 3859 | else |
Gilles Peskine | b0b189f | 2018-11-28 17:30:58 +0100 | [diff] [blame] | 3860 | #endif /* MBEDTLS_CCM_C */ |
mohammad1603 | 3957465 | 2018-06-01 04:39:53 -0700 | [diff] [blame] | 3861 | { |
mohammad1603 | 554faad | 2018-06-03 15:07:38 +0300 | [diff] [blame] | 3862 | return( PSA_ERROR_NOT_SUPPORTED ); |
mohammad1603 | 3957465 | 2018-06-01 04:39:53 -0700 | [diff] [blame] | 3863 | } |
Gilles Peskine | a40d774 | 2018-06-01 16:28:30 +0200 | [diff] [blame] | 3864 | |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3865 | if( status != PSA_SUCCESS && plaintext_size != 0 ) |
| 3866 | memset( plaintext, 0, plaintext_size ); |
mohammad1603 | 60a64d0 | 2018-06-03 17:20:42 +0300 | [diff] [blame] | 3867 | |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3868 | exit: |
Gilles Peskine | 30a9e41 | 2019-01-14 18:36:12 +0100 | [diff] [blame] | 3869 | psa_aead_abort_internal( &operation ); |
Gilles Peskine | edf9a65 | 2018-08-17 18:11:56 +0200 | [diff] [blame] | 3870 | if( status == PSA_SUCCESS ) |
| 3871 | *plaintext_length = ciphertext_length - operation.tag_length; |
| 3872 | return( status ); |
mohammad1603 | 5955c98 | 2018-04-26 00:53:03 +0300 | [diff] [blame] | 3873 | } |
| 3874 | |
Gilles Peskine | a0655c3 | 2018-04-30 17:06:50 +0200 | [diff] [blame] | 3875 | |
Gilles Peskine | 7bcfc0a | 2018-06-18 21:49:39 +0200 | [diff] [blame] | 3876 | |
Gilles Peskine | 20035e3 | 2018-02-03 22:44:14 +0100 | [diff] [blame] | 3877 | /****************************************************************/ |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 3878 | /* Generators */ |
| 3879 | /****************************************************************/ |
| 3880 | |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 3881 | #define HKDF_STATE_INIT 0 /* no input yet */ |
| 3882 | #define HKDF_STATE_STARTED 1 /* got salt */ |
| 3883 | #define HKDF_STATE_KEYED 2 /* got key */ |
| 3884 | #define HKDF_STATE_OUTPUT 3 /* output started */ |
| 3885 | |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 3886 | static psa_algorithm_t psa_generator_get_kdf_alg( |
| 3887 | const psa_crypto_generator_t *generator ) |
| 3888 | { |
| 3889 | if ( PSA_ALG_IS_KEY_AGREEMENT( generator->alg ) ) |
| 3890 | return( PSA_ALG_KEY_AGREEMENT_GET_KDF( generator->alg ) ); |
| 3891 | else |
| 3892 | return( generator->alg ); |
| 3893 | } |
| 3894 | |
| 3895 | |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 3896 | psa_status_t psa_generator_abort( psa_crypto_generator_t *generator ) |
| 3897 | { |
| 3898 | psa_status_t status = PSA_SUCCESS; |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 3899 | psa_algorithm_t kdf_alg = psa_generator_get_kdf_alg( generator ); |
| 3900 | if( kdf_alg == 0 ) |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 3901 | { |
| 3902 | /* The object has (apparently) been initialized but it is not |
| 3903 | * in use. It's ok to call abort on such an object, and there's |
| 3904 | * nothing to do. */ |
| 3905 | } |
| 3906 | else |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 3907 | if( kdf_alg == PSA_ALG_SELECT_RAW ) |
Gilles Peskine | 751d965 | 2018-09-18 12:05:44 +0200 | [diff] [blame] | 3908 | { |
| 3909 | if( generator->ctx.buffer.data != NULL ) |
| 3910 | { |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 3911 | mbedtls_platform_zeroize( generator->ctx.buffer.data, |
Gilles Peskine | 751d965 | 2018-09-18 12:05:44 +0200 | [diff] [blame] | 3912 | generator->ctx.buffer.size ); |
| 3913 | mbedtls_free( generator->ctx.buffer.data ); |
| 3914 | } |
| 3915 | } |
| 3916 | else |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 3917 | #if defined(MBEDTLS_MD_C) |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 3918 | if( PSA_ALG_IS_HKDF( kdf_alg ) ) |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 3919 | { |
| 3920 | mbedtls_free( generator->ctx.hkdf.info ); |
| 3921 | status = psa_hmac_abort_internal( &generator->ctx.hkdf.hmac ); |
| 3922 | } |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 3923 | else if( PSA_ALG_IS_TLS12_PRF( kdf_alg ) || |
Hanno Becker | 1aaedc0 | 2018-11-16 11:35:34 +0000 | [diff] [blame] | 3924 | /* TLS-1.2 PSK-to-MS KDF uses the same generator as TLS-1.2 PRF */ |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 3925 | PSA_ALG_IS_TLS12_PSK_TO_MS( kdf_alg ) ) |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 3926 | { |
| 3927 | if( generator->ctx.tls12_prf.key != NULL ) |
| 3928 | { |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 3929 | mbedtls_platform_zeroize( generator->ctx.tls12_prf.key, |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 3930 | generator->ctx.tls12_prf.key_len ); |
| 3931 | mbedtls_free( generator->ctx.tls12_prf.key ); |
| 3932 | } |
Hanno Becker | 580fba1 | 2018-11-13 20:50:45 +0000 | [diff] [blame] | 3933 | |
| 3934 | if( generator->ctx.tls12_prf.Ai_with_seed != NULL ) |
| 3935 | { |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 3936 | mbedtls_platform_zeroize( generator->ctx.tls12_prf.Ai_with_seed, |
Hanno Becker | 580fba1 | 2018-11-13 20:50:45 +0000 | [diff] [blame] | 3937 | generator->ctx.tls12_prf.Ai_with_seed_len ); |
| 3938 | mbedtls_free( generator->ctx.tls12_prf.Ai_with_seed ); |
| 3939 | } |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 3940 | } |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 3941 | else |
| 3942 | #endif /* MBEDTLS_MD_C */ |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 3943 | { |
| 3944 | status = PSA_ERROR_BAD_STATE; |
| 3945 | } |
| 3946 | memset( generator, 0, sizeof( *generator ) ); |
| 3947 | return( status ); |
| 3948 | } |
| 3949 | |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 3950 | psa_status_t psa_get_generator_capacity(const psa_crypto_generator_t *generator, |
| 3951 | size_t *capacity) |
| 3952 | { |
Jaeden Amero | cf2010c | 2019-02-15 13:05:49 +0000 | [diff] [blame] | 3953 | if( generator->alg == 0 ) |
| 3954 | { |
| 3955 | /* This is a blank generator. */ |
| 3956 | return PSA_ERROR_BAD_STATE; |
| 3957 | } |
| 3958 | |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 3959 | *capacity = generator->capacity; |
| 3960 | return( PSA_SUCCESS ); |
| 3961 | } |
| 3962 | |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 3963 | psa_status_t psa_set_generator_capacity( psa_crypto_generator_t *generator, |
| 3964 | size_t capacity ) |
| 3965 | { |
| 3966 | if( generator->alg == 0 ) |
| 3967 | return( PSA_ERROR_BAD_STATE ); |
| 3968 | if( capacity > generator->capacity ) |
| 3969 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 3970 | generator->capacity = capacity; |
| 3971 | return( PSA_SUCCESS ); |
| 3972 | } |
| 3973 | |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 3974 | #if defined(MBEDTLS_MD_C) |
| 3975 | /* Read some bytes from an HKDF-based generator. This performs a chunk |
| 3976 | * of the expand phase of the HKDF algorithm. */ |
| 3977 | static psa_status_t psa_generator_hkdf_read( psa_hkdf_generator_t *hkdf, |
| 3978 | psa_algorithm_t hash_alg, |
| 3979 | uint8_t *output, |
| 3980 | size_t output_length ) |
| 3981 | { |
| 3982 | uint8_t hash_length = PSA_HASH_SIZE( hash_alg ); |
| 3983 | psa_status_t status; |
| 3984 | |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 3985 | if( hkdf->state < HKDF_STATE_KEYED || ! hkdf->info_set ) |
| 3986 | return( PSA_ERROR_BAD_STATE ); |
| 3987 | hkdf->state = HKDF_STATE_OUTPUT; |
| 3988 | |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 3989 | while( output_length != 0 ) |
| 3990 | { |
| 3991 | /* Copy what remains of the current block */ |
| 3992 | uint8_t n = hash_length - hkdf->offset_in_block; |
| 3993 | if( n > output_length ) |
| 3994 | n = (uint8_t) output_length; |
| 3995 | memcpy( output, hkdf->output_block + hkdf->offset_in_block, n ); |
| 3996 | output += n; |
| 3997 | output_length -= n; |
| 3998 | hkdf->offset_in_block += n; |
Gilles Peskine | d54931c | 2018-07-17 21:06:59 +0200 | [diff] [blame] | 3999 | if( output_length == 0 ) |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4000 | break; |
Gilles Peskine | d54931c | 2018-07-17 21:06:59 +0200 | [diff] [blame] | 4001 | /* We can't be wanting more output after block 0xff, otherwise |
| 4002 | * the capacity check in psa_generator_read() would have |
| 4003 | * prevented this call. It could happen only if the generator |
| 4004 | * object was corrupted or if this function is called directly |
| 4005 | * inside the library. */ |
| 4006 | if( hkdf->block_number == 0xff ) |
| 4007 | return( PSA_ERROR_BAD_STATE ); |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4008 | |
| 4009 | /* We need a new block */ |
| 4010 | ++hkdf->block_number; |
| 4011 | hkdf->offset_in_block = 0; |
| 4012 | status = psa_hmac_setup_internal( &hkdf->hmac, |
| 4013 | hkdf->prk, hash_length, |
| 4014 | hash_alg ); |
| 4015 | if( status != PSA_SUCCESS ) |
| 4016 | return( status ); |
| 4017 | if( hkdf->block_number != 1 ) |
| 4018 | { |
| 4019 | status = psa_hash_update( &hkdf->hmac.hash_ctx, |
| 4020 | hkdf->output_block, |
| 4021 | hash_length ); |
| 4022 | if( status != PSA_SUCCESS ) |
| 4023 | return( status ); |
| 4024 | } |
| 4025 | status = psa_hash_update( &hkdf->hmac.hash_ctx, |
| 4026 | hkdf->info, |
| 4027 | hkdf->info_length ); |
| 4028 | if( status != PSA_SUCCESS ) |
| 4029 | return( status ); |
| 4030 | status = psa_hash_update( &hkdf->hmac.hash_ctx, |
| 4031 | &hkdf->block_number, 1 ); |
| 4032 | if( status != PSA_SUCCESS ) |
| 4033 | return( status ); |
| 4034 | status = psa_hmac_finish_internal( &hkdf->hmac, |
| 4035 | hkdf->output_block, |
| 4036 | sizeof( hkdf->output_block ) ); |
| 4037 | if( status != PSA_SUCCESS ) |
| 4038 | return( status ); |
| 4039 | } |
| 4040 | |
| 4041 | return( PSA_SUCCESS ); |
| 4042 | } |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4043 | |
| 4044 | static psa_status_t psa_generator_tls12_prf_generate_next_block( |
| 4045 | psa_tls12_prf_generator_t *tls12_prf, |
| 4046 | psa_algorithm_t alg ) |
| 4047 | { |
| 4048 | psa_algorithm_t hash_alg = PSA_ALG_HKDF_GET_HASH( alg ); |
| 4049 | uint8_t hash_length = PSA_HASH_SIZE( hash_alg ); |
| 4050 | psa_hmac_internal_data hmac; |
| 4051 | psa_status_t status, cleanup_status; |
| 4052 | |
Hanno Becker | 3b339e2 | 2018-11-13 20:56:14 +0000 | [diff] [blame] | 4053 | unsigned char *Ai; |
| 4054 | size_t Ai_len; |
| 4055 | |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4056 | /* We can't be wanting more output after block 0xff, otherwise |
| 4057 | * the capacity check in psa_generator_read() would have |
| 4058 | * prevented this call. It could happen only if the generator |
| 4059 | * object was corrupted or if this function is called directly |
| 4060 | * inside the library. */ |
| 4061 | if( tls12_prf->block_number == 0xff ) |
| 4062 | return( PSA_ERROR_BAD_STATE ); |
| 4063 | |
| 4064 | /* We need a new block */ |
| 4065 | ++tls12_prf->block_number; |
| 4066 | tls12_prf->offset_in_block = 0; |
| 4067 | |
| 4068 | /* Recall the definition of the TLS-1.2-PRF from RFC 5246: |
| 4069 | * |
| 4070 | * PRF(secret, label, seed) = P_<hash>(secret, label + seed) |
| 4071 | * |
| 4072 | * P_hash(secret, seed) = HMAC_hash(secret, A(1) + seed) + |
| 4073 | * HMAC_hash(secret, A(2) + seed) + |
| 4074 | * HMAC_hash(secret, A(3) + seed) + ... |
| 4075 | * |
| 4076 | * A(0) = seed |
| 4077 | * A(i) = HMAC_hash( secret, A(i-1) ) |
| 4078 | * |
| 4079 | * The `psa_tls12_prf_generator` structures saves the block |
| 4080 | * `HMAC_hash(secret, A(i) + seed)` from which the output |
| 4081 | * is currently extracted as `output_block`, while |
| 4082 | * `A(i) + seed` is stored in `Ai_with_seed`. |
| 4083 | * |
| 4084 | * Generating a new block means recalculating `Ai_with_seed` |
| 4085 | * from the A(i)-part of it, and afterwards recalculating |
| 4086 | * `output_block`. |
| 4087 | * |
| 4088 | * A(0) is computed at setup time. |
| 4089 | * |
| 4090 | */ |
| 4091 | |
| 4092 | psa_hmac_init_internal( &hmac ); |
| 4093 | |
| 4094 | /* We must distinguish the calculation of A(1) from those |
| 4095 | * of A(2) and higher, because A(0)=seed has a different |
| 4096 | * length than the other A(i). */ |
| 4097 | if( tls12_prf->block_number == 1 ) |
| 4098 | { |
Hanno Becker | 3b339e2 | 2018-11-13 20:56:14 +0000 | [diff] [blame] | 4099 | Ai = tls12_prf->Ai_with_seed + hash_length; |
| 4100 | Ai_len = tls12_prf->Ai_with_seed_len - hash_length; |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4101 | } |
| 4102 | else |
| 4103 | { |
Hanno Becker | 3b339e2 | 2018-11-13 20:56:14 +0000 | [diff] [blame] | 4104 | Ai = tls12_prf->Ai_with_seed; |
| 4105 | Ai_len = hash_length; |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4106 | } |
| 4107 | |
Hanno Becker | 3b339e2 | 2018-11-13 20:56:14 +0000 | [diff] [blame] | 4108 | /* Compute A(i+1) = HMAC_hash(secret, A(i)) */ |
| 4109 | status = psa_hmac_setup_internal( &hmac, |
| 4110 | tls12_prf->key, |
| 4111 | tls12_prf->key_len, |
| 4112 | hash_alg ); |
| 4113 | if( status != PSA_SUCCESS ) |
| 4114 | goto cleanup; |
| 4115 | |
| 4116 | status = psa_hash_update( &hmac.hash_ctx, |
| 4117 | Ai, Ai_len ); |
| 4118 | if( status != PSA_SUCCESS ) |
| 4119 | goto cleanup; |
| 4120 | |
| 4121 | status = psa_hmac_finish_internal( &hmac, |
| 4122 | tls12_prf->Ai_with_seed, |
| 4123 | hash_length ); |
| 4124 | if( status != PSA_SUCCESS ) |
| 4125 | goto cleanup; |
| 4126 | |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4127 | /* Compute the next block `HMAC_hash(secret, A(i+1) + seed)`. */ |
| 4128 | status = psa_hmac_setup_internal( &hmac, |
| 4129 | tls12_prf->key, |
| 4130 | tls12_prf->key_len, |
| 4131 | hash_alg ); |
| 4132 | if( status != PSA_SUCCESS ) |
| 4133 | goto cleanup; |
| 4134 | |
| 4135 | status = psa_hash_update( &hmac.hash_ctx, |
| 4136 | tls12_prf->Ai_with_seed, |
Hanno Becker | 580fba1 | 2018-11-13 20:50:45 +0000 | [diff] [blame] | 4137 | tls12_prf->Ai_with_seed_len ); |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4138 | if( status != PSA_SUCCESS ) |
| 4139 | goto cleanup; |
| 4140 | |
| 4141 | status = psa_hmac_finish_internal( &hmac, |
| 4142 | tls12_prf->output_block, |
| 4143 | hash_length ); |
| 4144 | if( status != PSA_SUCCESS ) |
| 4145 | goto cleanup; |
| 4146 | |
| 4147 | cleanup: |
| 4148 | |
| 4149 | cleanup_status = psa_hmac_abort_internal( &hmac ); |
| 4150 | if( status == PSA_SUCCESS && cleanup_status != PSA_SUCCESS ) |
| 4151 | status = cleanup_status; |
| 4152 | |
| 4153 | return( status ); |
| 4154 | } |
| 4155 | |
| 4156 | /* Read some bytes from an TLS-1.2-PRF-based generator. |
| 4157 | * See Section 5 of RFC 5246. */ |
| 4158 | static psa_status_t psa_generator_tls12_prf_read( |
| 4159 | psa_tls12_prf_generator_t *tls12_prf, |
| 4160 | psa_algorithm_t alg, |
| 4161 | uint8_t *output, |
| 4162 | size_t output_length ) |
| 4163 | { |
| 4164 | psa_algorithm_t hash_alg = PSA_ALG_TLS12_PRF_GET_HASH( alg ); |
| 4165 | uint8_t hash_length = PSA_HASH_SIZE( hash_alg ); |
| 4166 | psa_status_t status; |
| 4167 | |
| 4168 | while( output_length != 0 ) |
| 4169 | { |
| 4170 | /* Copy what remains of the current block */ |
| 4171 | uint8_t n = hash_length - tls12_prf->offset_in_block; |
| 4172 | |
| 4173 | /* Check if we have fully processed the current block. */ |
| 4174 | if( n == 0 ) |
| 4175 | { |
| 4176 | status = psa_generator_tls12_prf_generate_next_block( tls12_prf, |
| 4177 | alg ); |
| 4178 | if( status != PSA_SUCCESS ) |
| 4179 | return( status ); |
| 4180 | |
| 4181 | continue; |
| 4182 | } |
| 4183 | |
| 4184 | if( n > output_length ) |
| 4185 | n = (uint8_t) output_length; |
| 4186 | memcpy( output, tls12_prf->output_block + tls12_prf->offset_in_block, |
| 4187 | n ); |
| 4188 | output += n; |
| 4189 | output_length -= n; |
| 4190 | tls12_prf->offset_in_block += n; |
| 4191 | } |
| 4192 | |
| 4193 | return( PSA_SUCCESS ); |
| 4194 | } |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4195 | #endif /* MBEDTLS_MD_C */ |
| 4196 | |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 4197 | psa_status_t psa_generator_read( psa_crypto_generator_t *generator, |
| 4198 | uint8_t *output, |
| 4199 | size_t output_length ) |
| 4200 | { |
| 4201 | psa_status_t status; |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4202 | psa_algorithm_t kdf_alg = psa_generator_get_kdf_alg( generator ); |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 4203 | |
Jaeden Amero | cf2010c | 2019-02-15 13:05:49 +0000 | [diff] [blame] | 4204 | if( generator->alg == 0 ) |
| 4205 | { |
| 4206 | /* This is a blank generator. */ |
| 4207 | return PSA_ERROR_BAD_STATE; |
| 4208 | } |
| 4209 | |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 4210 | if( output_length > generator->capacity ) |
| 4211 | { |
| 4212 | generator->capacity = 0; |
| 4213 | /* Go through the error path to wipe all confidential data now |
| 4214 | * that the generator object is useless. */ |
David Saada | b4ecc27 | 2019-02-14 13:48:10 +0200 | [diff] [blame] | 4215 | status = PSA_ERROR_INSUFFICIENT_DATA; |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 4216 | goto exit; |
| 4217 | } |
Jaeden Amero | cf2010c | 2019-02-15 13:05:49 +0000 | [diff] [blame] | 4218 | if( output_length == 0 && generator->capacity == 0 ) |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 4219 | { |
Jaeden Amero | cf2010c | 2019-02-15 13:05:49 +0000 | [diff] [blame] | 4220 | /* Edge case: this is a finished generator, and 0 bytes |
| 4221 | * were requested. The right error in this case could |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 4222 | * be either INSUFFICIENT_CAPACITY or BAD_STATE. Return |
| 4223 | * INSUFFICIENT_CAPACITY, which is right for a finished |
| 4224 | * generator, for consistency with the case when |
| 4225 | * output_length > 0. */ |
David Saada | b4ecc27 | 2019-02-14 13:48:10 +0200 | [diff] [blame] | 4226 | return( PSA_ERROR_INSUFFICIENT_DATA ); |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 4227 | } |
| 4228 | generator->capacity -= output_length; |
| 4229 | |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4230 | if( kdf_alg == PSA_ALG_SELECT_RAW ) |
Gilles Peskine | 751d965 | 2018-09-18 12:05:44 +0200 | [diff] [blame] | 4231 | { |
Gilles Peskine | 211a436 | 2018-10-25 22:22:31 +0200 | [diff] [blame] | 4232 | /* Initially, the capacity of a selection generator is always |
| 4233 | * the size of the buffer, i.e. `generator->ctx.buffer.size`, |
| 4234 | * abbreviated in this comment as `size`. When the remaining |
| 4235 | * capacity is `c`, the next bytes to serve start `c` bytes |
| 4236 | * from the end of the buffer, i.e. `size - c` from the |
| 4237 | * beginning of the buffer. Since `generator->capacity` was just |
| 4238 | * decremented above, we need to serve the bytes from |
| 4239 | * `size - generator->capacity - output_length` to |
| 4240 | * `size - generator->capacity`. */ |
Gilles Peskine | 751d965 | 2018-09-18 12:05:44 +0200 | [diff] [blame] | 4241 | size_t offset = |
| 4242 | generator->ctx.buffer.size - generator->capacity - output_length; |
| 4243 | memcpy( output, generator->ctx.buffer.data + offset, output_length ); |
| 4244 | status = PSA_SUCCESS; |
| 4245 | } |
| 4246 | else |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4247 | #if defined(MBEDTLS_MD_C) |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4248 | if( PSA_ALG_IS_HKDF( kdf_alg ) ) |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4249 | { |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4250 | psa_algorithm_t hash_alg = PSA_ALG_HKDF_GET_HASH( kdf_alg ); |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4251 | status = psa_generator_hkdf_read( &generator->ctx.hkdf, hash_alg, |
| 4252 | output, output_length ); |
| 4253 | } |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4254 | else if( PSA_ALG_IS_TLS12_PRF( kdf_alg ) || |
| 4255 | PSA_ALG_IS_TLS12_PSK_TO_MS( kdf_alg ) ) |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4256 | { |
| 4257 | status = psa_generator_tls12_prf_read( &generator->ctx.tls12_prf, |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4258 | kdf_alg, output, |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4259 | output_length ); |
| 4260 | } |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4261 | else |
| 4262 | #endif /* MBEDTLS_MD_C */ |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 4263 | { |
| 4264 | return( PSA_ERROR_BAD_STATE ); |
| 4265 | } |
| 4266 | |
| 4267 | exit: |
| 4268 | if( status != PSA_SUCCESS ) |
| 4269 | { |
Jaeden Amero | cf2010c | 2019-02-15 13:05:49 +0000 | [diff] [blame] | 4270 | /* Preserve the algorithm upon errors, but clear all sensitive state. |
| 4271 | * This allows us to differentiate between exhausted generators and |
| 4272 | * blank generators, so we can return PSA_ERROR_BAD_STATE on blank |
| 4273 | * generators. */ |
| 4274 | psa_algorithm_t alg = generator->alg; |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 4275 | psa_generator_abort( generator ); |
Jaeden Amero | cf2010c | 2019-02-15 13:05:49 +0000 | [diff] [blame] | 4276 | generator->alg = alg; |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 4277 | memset( output, '!', output_length ); |
| 4278 | } |
| 4279 | return( status ); |
| 4280 | } |
| 4281 | |
Gilles Peskine | 08542d8 | 2018-07-19 17:05:42 +0200 | [diff] [blame] | 4282 | #if defined(MBEDTLS_DES_C) |
| 4283 | static void psa_des_set_key_parity( uint8_t *data, size_t data_size ) |
| 4284 | { |
| 4285 | if( data_size >= 8 ) |
| 4286 | mbedtls_des_key_set_parity( data ); |
| 4287 | if( data_size >= 16 ) |
| 4288 | mbedtls_des_key_set_parity( data + 8 ); |
| 4289 | if( data_size >= 24 ) |
| 4290 | mbedtls_des_key_set_parity( data + 16 ); |
| 4291 | } |
| 4292 | #endif /* MBEDTLS_DES_C */ |
| 4293 | |
Gilles Peskine | ff5f0e7 | 2019-04-18 12:53:30 +0200 | [diff] [blame] | 4294 | static psa_status_t psa_generator_import_key_internal( |
| 4295 | psa_key_slot_t *slot, |
| 4296 | size_t bits, |
| 4297 | psa_crypto_generator_t *generator ) |
| 4298 | { |
| 4299 | uint8_t *data = NULL; |
| 4300 | size_t bytes = PSA_BITS_TO_BYTES( bits ); |
| 4301 | psa_status_t status; |
| 4302 | |
| 4303 | if( ! key_type_is_raw_bytes( slot->type ) ) |
| 4304 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4305 | if( bits % 8 != 0 ) |
| 4306 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4307 | data = mbedtls_calloc( 1, bytes ); |
| 4308 | if( data == NULL ) |
| 4309 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 4310 | |
| 4311 | status = psa_generator_read( generator, data, bytes ); |
| 4312 | if( status != PSA_SUCCESS ) |
| 4313 | goto exit; |
| 4314 | #if defined(MBEDTLS_DES_C) |
| 4315 | if( slot->type == PSA_KEY_TYPE_DES ) |
| 4316 | psa_des_set_key_parity( data, bytes ); |
| 4317 | #endif /* MBEDTLS_DES_C */ |
| 4318 | status = psa_import_key_into_slot( slot, data, bytes ); |
| 4319 | |
| 4320 | exit: |
| 4321 | mbedtls_free( data ); |
| 4322 | return( status ); |
| 4323 | } |
| 4324 | |
| 4325 | psa_status_t psa_generator_import_key( const psa_key_attributes_t *attributes, |
| 4326 | psa_key_handle_t *handle, |
Gilles Peskine | ff5f0e7 | 2019-04-18 12:53:30 +0200 | [diff] [blame] | 4327 | psa_crypto_generator_t *generator ) |
| 4328 | { |
| 4329 | psa_status_t status; |
| 4330 | psa_key_slot_t *slot = NULL; |
| 4331 | status = psa_start_key_creation( attributes, handle, &slot ); |
| 4332 | if( status == PSA_SUCCESS ) |
| 4333 | { |
Gilles Peskine | 3a4f1f8 | 2019-04-26 13:49:28 +0200 | [diff] [blame] | 4334 | status = psa_generator_import_key_internal( slot, |
| 4335 | attributes->bits, |
| 4336 | generator ); |
Gilles Peskine | ff5f0e7 | 2019-04-18 12:53:30 +0200 | [diff] [blame] | 4337 | } |
| 4338 | if( status == PSA_SUCCESS ) |
| 4339 | status = psa_finish_key_creation( slot ); |
| 4340 | if( status != PSA_SUCCESS ) |
| 4341 | { |
| 4342 | psa_fail_key_creation( slot ); |
| 4343 | *handle = 0; |
| 4344 | } |
| 4345 | return( status ); |
| 4346 | } |
| 4347 | |
Gilles Peskine | 87a5e56 | 2019-04-17 12:28:25 +0200 | [diff] [blame] | 4348 | psa_status_t psa_generator_import_key_to_handle( psa_key_handle_t handle, |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 4349 | psa_key_type_t type, |
| 4350 | size_t bits, |
| 4351 | psa_crypto_generator_t *generator ) |
| 4352 | { |
| 4353 | uint8_t *data = NULL; |
| 4354 | size_t bytes = PSA_BITS_TO_BYTES( bits ); |
| 4355 | psa_status_t status; |
| 4356 | |
| 4357 | if( ! key_type_is_raw_bytes( type ) ) |
| 4358 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4359 | if( bits % 8 != 0 ) |
| 4360 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4361 | data = mbedtls_calloc( 1, bytes ); |
| 4362 | if( data == NULL ) |
| 4363 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 4364 | |
| 4365 | status = psa_generator_read( generator, data, bytes ); |
| 4366 | if( status != PSA_SUCCESS ) |
| 4367 | goto exit; |
Gilles Peskine | 08542d8 | 2018-07-19 17:05:42 +0200 | [diff] [blame] | 4368 | #if defined(MBEDTLS_DES_C) |
| 4369 | if( type == PSA_KEY_TYPE_DES ) |
| 4370 | psa_des_set_key_parity( data, bytes ); |
| 4371 | #endif /* MBEDTLS_DES_C */ |
Gilles Peskine | 87a5e56 | 2019-04-17 12:28:25 +0200 | [diff] [blame] | 4372 | status = psa_import_key_to_handle( handle, type, data, bytes ); |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 4373 | |
| 4374 | exit: |
| 4375 | mbedtls_free( data ); |
| 4376 | return( status ); |
| 4377 | } |
| 4378 | |
| 4379 | |
| 4380 | |
| 4381 | /****************************************************************/ |
Gilles Peskine | ea0fb49 | 2018-07-12 17:17:20 +0200 | [diff] [blame] | 4382 | /* Key derivation */ |
| 4383 | /****************************************************************/ |
| 4384 | |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 4385 | #if defined(MBEDTLS_MD_C) |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4386 | /* Set up an HKDF-based generator. This is exactly the extract phase |
Gilles Peskine | 346797d | 2018-11-16 16:05:06 +0100 | [diff] [blame] | 4387 | * of the HKDF algorithm. |
| 4388 | * |
| 4389 | * Note that if this function fails, you must call psa_generator_abort() |
| 4390 | * to potentially free embedded data structures and wipe confidential data. |
| 4391 | */ |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4392 | static psa_status_t psa_generator_hkdf_setup( psa_hkdf_generator_t *hkdf, |
Gilles Peskine | cce18ae | 2018-09-18 12:03:52 +0200 | [diff] [blame] | 4393 | const uint8_t *secret, |
| 4394 | size_t secret_length, |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4395 | psa_algorithm_t hash_alg, |
| 4396 | const uint8_t *salt, |
| 4397 | size_t salt_length, |
| 4398 | const uint8_t *label, |
| 4399 | size_t label_length ) |
| 4400 | { |
| 4401 | psa_status_t status; |
| 4402 | status = psa_hmac_setup_internal( &hkdf->hmac, |
| 4403 | salt, salt_length, |
Gilles Peskine | f9ee633 | 2019-04-11 21:22:52 +0200 | [diff] [blame] | 4404 | hash_alg ); |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4405 | if( status != PSA_SUCCESS ) |
| 4406 | return( status ); |
Gilles Peskine | cce18ae | 2018-09-18 12:03:52 +0200 | [diff] [blame] | 4407 | status = psa_hash_update( &hkdf->hmac.hash_ctx, secret, secret_length ); |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4408 | if( status != PSA_SUCCESS ) |
| 4409 | return( status ); |
| 4410 | status = psa_hmac_finish_internal( &hkdf->hmac, |
| 4411 | hkdf->prk, |
| 4412 | sizeof( hkdf->prk ) ); |
| 4413 | if( status != PSA_SUCCESS ) |
| 4414 | return( status ); |
| 4415 | hkdf->offset_in_block = PSA_HASH_SIZE( hash_alg ); |
| 4416 | hkdf->block_number = 0; |
| 4417 | hkdf->info_length = label_length; |
| 4418 | if( label_length != 0 ) |
| 4419 | { |
| 4420 | hkdf->info = mbedtls_calloc( 1, label_length ); |
| 4421 | if( hkdf->info == NULL ) |
| 4422 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 4423 | memcpy( hkdf->info, label, label_length ); |
| 4424 | } |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4425 | hkdf->state = HKDF_STATE_KEYED; |
| 4426 | hkdf->info_set = 1; |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4427 | return( PSA_SUCCESS ); |
| 4428 | } |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 4429 | #endif /* MBEDTLS_MD_C */ |
Gilles Peskine | bef7f14 | 2018-07-12 17:22:21 +0200 | [diff] [blame] | 4430 | |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 4431 | #if defined(MBEDTLS_MD_C) |
Gilles Peskine | 346797d | 2018-11-16 16:05:06 +0100 | [diff] [blame] | 4432 | /* Set up a TLS-1.2-prf-based generator (see RFC 5246, Section 5). |
| 4433 | * |
| 4434 | * Note that if this function fails, you must call psa_generator_abort() |
| 4435 | * to potentially free embedded data structures and wipe confidential data. |
| 4436 | */ |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4437 | static psa_status_t psa_generator_tls12_prf_setup( |
| 4438 | psa_tls12_prf_generator_t *tls12_prf, |
| 4439 | const unsigned char *key, |
| 4440 | size_t key_len, |
| 4441 | psa_algorithm_t hash_alg, |
| 4442 | const uint8_t *salt, |
| 4443 | size_t salt_length, |
| 4444 | const uint8_t *label, |
| 4445 | size_t label_length ) |
| 4446 | { |
| 4447 | uint8_t hash_length = PSA_HASH_SIZE( hash_alg ); |
Hanno Becker | 580fba1 | 2018-11-13 20:50:45 +0000 | [diff] [blame] | 4448 | size_t Ai_with_seed_len = hash_length + salt_length + label_length; |
| 4449 | int overflow; |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4450 | |
| 4451 | tls12_prf->key = mbedtls_calloc( 1, key_len ); |
| 4452 | if( tls12_prf->key == NULL ) |
| 4453 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 4454 | tls12_prf->key_len = key_len; |
| 4455 | memcpy( tls12_prf->key, key, key_len ); |
| 4456 | |
Hanno Becker | 580fba1 | 2018-11-13 20:50:45 +0000 | [diff] [blame] | 4457 | overflow = ( salt_length + label_length < salt_length ) || |
| 4458 | ( salt_length + label_length + hash_length < hash_length ); |
| 4459 | if( overflow ) |
| 4460 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4461 | |
| 4462 | tls12_prf->Ai_with_seed = mbedtls_calloc( 1, Ai_with_seed_len ); |
| 4463 | if( tls12_prf->Ai_with_seed == NULL ) |
| 4464 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 4465 | tls12_prf->Ai_with_seed_len = Ai_with_seed_len; |
| 4466 | |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4467 | /* Write `label + seed' at the end of the `A(i) + seed` buffer, |
| 4468 | * leaving the initial `hash_length` bytes unspecified for now. */ |
Hanno Becker | 353e453 | 2018-11-15 09:53:57 +0000 | [diff] [blame] | 4469 | if( label_length != 0 ) |
| 4470 | { |
| 4471 | memcpy( tls12_prf->Ai_with_seed + hash_length, |
| 4472 | label, label_length ); |
| 4473 | } |
| 4474 | |
| 4475 | if( salt_length != 0 ) |
| 4476 | { |
| 4477 | memcpy( tls12_prf->Ai_with_seed + hash_length + label_length, |
| 4478 | salt, salt_length ); |
| 4479 | } |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4480 | |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4481 | /* The first block gets generated when |
| 4482 | * psa_generator_read() is called. */ |
| 4483 | tls12_prf->block_number = 0; |
| 4484 | tls12_prf->offset_in_block = hash_length; |
| 4485 | |
| 4486 | return( PSA_SUCCESS ); |
| 4487 | } |
Hanno Becker | 1aaedc0 | 2018-11-16 11:35:34 +0000 | [diff] [blame] | 4488 | |
| 4489 | /* Set up a TLS-1.2-PSK-to-MS-based generator. */ |
| 4490 | static psa_status_t psa_generator_tls12_psk_to_ms_setup( |
| 4491 | psa_tls12_prf_generator_t *tls12_prf, |
| 4492 | const unsigned char *psk, |
| 4493 | size_t psk_len, |
| 4494 | psa_algorithm_t hash_alg, |
| 4495 | const uint8_t *salt, |
| 4496 | size_t salt_length, |
| 4497 | const uint8_t *label, |
| 4498 | size_t label_length ) |
| 4499 | { |
| 4500 | psa_status_t status; |
| 4501 | unsigned char pms[ 4 + 2 * PSA_ALG_TLS12_PSK_TO_MS_MAX_PSK_LEN ]; |
| 4502 | |
| 4503 | if( psk_len > PSA_ALG_TLS12_PSK_TO_MS_MAX_PSK_LEN ) |
| 4504 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4505 | |
| 4506 | /* Quoting RFC 4279, Section 2: |
| 4507 | * |
| 4508 | * The premaster secret is formed as follows: if the PSK is N octets |
| 4509 | * long, concatenate a uint16 with the value N, N zero octets, a second |
| 4510 | * uint16 with the value N, and the PSK itself. |
| 4511 | */ |
| 4512 | |
| 4513 | pms[0] = ( psk_len >> 8 ) & 0xff; |
| 4514 | pms[1] = ( psk_len >> 0 ) & 0xff; |
| 4515 | memset( pms + 2, 0, psk_len ); |
| 4516 | pms[2 + psk_len + 0] = pms[0]; |
| 4517 | pms[2 + psk_len + 1] = pms[1]; |
| 4518 | memcpy( pms + 4 + psk_len, psk, psk_len ); |
| 4519 | |
| 4520 | status = psa_generator_tls12_prf_setup( tls12_prf, |
| 4521 | pms, 4 + 2 * psk_len, |
| 4522 | hash_alg, |
| 4523 | salt, salt_length, |
| 4524 | label, label_length ); |
| 4525 | |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 4526 | mbedtls_platform_zeroize( pms, sizeof( pms ) ); |
Hanno Becker | 1aaedc0 | 2018-11-16 11:35:34 +0000 | [diff] [blame] | 4527 | return( status ); |
| 4528 | } |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 4529 | #endif /* MBEDTLS_MD_C */ |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4530 | |
Gilles Peskine | 346797d | 2018-11-16 16:05:06 +0100 | [diff] [blame] | 4531 | /* Note that if this function fails, you must call psa_generator_abort() |
| 4532 | * to potentially free embedded data structures and wipe confidential data. |
| 4533 | */ |
Gilles Peskine | cce18ae | 2018-09-18 12:03:52 +0200 | [diff] [blame] | 4534 | static psa_status_t psa_key_derivation_internal( |
| 4535 | psa_crypto_generator_t *generator, |
| 4536 | const uint8_t *secret, size_t secret_length, |
| 4537 | psa_algorithm_t alg, |
| 4538 | const uint8_t *salt, size_t salt_length, |
| 4539 | const uint8_t *label, size_t label_length, |
| 4540 | size_t capacity ) |
| 4541 | { |
| 4542 | psa_status_t status; |
| 4543 | size_t max_capacity; |
| 4544 | |
| 4545 | /* Set generator->alg even on failure so that abort knows what to do. */ |
| 4546 | generator->alg = alg; |
| 4547 | |
Gilles Peskine | 751d965 | 2018-09-18 12:05:44 +0200 | [diff] [blame] | 4548 | if( alg == PSA_ALG_SELECT_RAW ) |
| 4549 | { |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 4550 | (void) salt; |
Gilles Peskine | 751d965 | 2018-09-18 12:05:44 +0200 | [diff] [blame] | 4551 | if( salt_length != 0 ) |
| 4552 | return( PSA_ERROR_INVALID_ARGUMENT ); |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 4553 | (void) label; |
Gilles Peskine | 751d965 | 2018-09-18 12:05:44 +0200 | [diff] [blame] | 4554 | if( label_length != 0 ) |
| 4555 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4556 | generator->ctx.buffer.data = mbedtls_calloc( 1, secret_length ); |
| 4557 | if( generator->ctx.buffer.data == NULL ) |
| 4558 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 4559 | memcpy( generator->ctx.buffer.data, secret, secret_length ); |
| 4560 | generator->ctx.buffer.size = secret_length; |
| 4561 | max_capacity = secret_length; |
| 4562 | status = PSA_SUCCESS; |
| 4563 | } |
| 4564 | else |
Gilles Peskine | cce18ae | 2018-09-18 12:03:52 +0200 | [diff] [blame] | 4565 | #if defined(MBEDTLS_MD_C) |
| 4566 | if( PSA_ALG_IS_HKDF( alg ) ) |
| 4567 | { |
| 4568 | psa_algorithm_t hash_alg = PSA_ALG_HKDF_GET_HASH( alg ); |
| 4569 | size_t hash_size = PSA_HASH_SIZE( hash_alg ); |
| 4570 | if( hash_size == 0 ) |
| 4571 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 4572 | max_capacity = 255 * hash_size; |
| 4573 | status = psa_generator_hkdf_setup( &generator->ctx.hkdf, |
| 4574 | secret, secret_length, |
| 4575 | hash_alg, |
| 4576 | salt, salt_length, |
| 4577 | label, label_length ); |
| 4578 | } |
Hanno Becker | 1aaedc0 | 2018-11-16 11:35:34 +0000 | [diff] [blame] | 4579 | /* TLS-1.2 PRF and TLS-1.2 PSK-to-MS are very similar, so share code. */ |
| 4580 | else if( PSA_ALG_IS_TLS12_PRF( alg ) || |
| 4581 | PSA_ALG_IS_TLS12_PSK_TO_MS( alg ) ) |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4582 | { |
| 4583 | psa_algorithm_t hash_alg = PSA_ALG_TLS12_PRF_GET_HASH( alg ); |
| 4584 | size_t hash_size = PSA_HASH_SIZE( hash_alg ); |
| 4585 | |
| 4586 | /* TLS-1.2 PRF supports only SHA-256 and SHA-384. */ |
| 4587 | if( hash_alg != PSA_ALG_SHA_256 && |
| 4588 | hash_alg != PSA_ALG_SHA_384 ) |
| 4589 | { |
| 4590 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 4591 | } |
| 4592 | |
| 4593 | max_capacity = 255 * hash_size; |
Hanno Becker | 1aaedc0 | 2018-11-16 11:35:34 +0000 | [diff] [blame] | 4594 | |
| 4595 | if( PSA_ALG_IS_TLS12_PRF( alg ) ) |
| 4596 | { |
| 4597 | status = psa_generator_tls12_prf_setup( &generator->ctx.tls12_prf, |
| 4598 | secret, secret_length, |
| 4599 | hash_alg, salt, salt_length, |
| 4600 | label, label_length ); |
| 4601 | } |
| 4602 | else |
| 4603 | { |
| 4604 | status = psa_generator_tls12_psk_to_ms_setup( |
| 4605 | &generator->ctx.tls12_prf, |
| 4606 | secret, secret_length, |
| 4607 | hash_alg, salt, salt_length, |
| 4608 | label, label_length ); |
| 4609 | } |
Hanno Becker | c8a41d7 | 2018-10-09 17:33:01 +0100 | [diff] [blame] | 4610 | } |
Gilles Peskine | cce18ae | 2018-09-18 12:03:52 +0200 | [diff] [blame] | 4611 | else |
| 4612 | #endif |
| 4613 | { |
| 4614 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 4615 | } |
| 4616 | |
| 4617 | if( status != PSA_SUCCESS ) |
| 4618 | return( status ); |
| 4619 | |
| 4620 | if( capacity <= max_capacity ) |
| 4621 | generator->capacity = capacity; |
Gilles Peskine | 8feb3a8 | 2018-09-18 12:06:11 +0200 | [diff] [blame] | 4622 | else if( capacity == PSA_GENERATOR_UNBRIDLED_CAPACITY ) |
| 4623 | generator->capacity = max_capacity; |
Gilles Peskine | cce18ae | 2018-09-18 12:03:52 +0200 | [diff] [blame] | 4624 | else |
| 4625 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4626 | |
| 4627 | return( PSA_SUCCESS ); |
| 4628 | } |
| 4629 | |
Gilles Peskine | ea0fb49 | 2018-07-12 17:17:20 +0200 | [diff] [blame] | 4630 | psa_status_t psa_key_derivation( psa_crypto_generator_t *generator, |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 4631 | psa_key_handle_t handle, |
Gilles Peskine | ea0fb49 | 2018-07-12 17:17:20 +0200 | [diff] [blame] | 4632 | psa_algorithm_t alg, |
| 4633 | const uint8_t *salt, |
| 4634 | size_t salt_length, |
| 4635 | const uint8_t *label, |
| 4636 | size_t label_length, |
| 4637 | size_t capacity ) |
| 4638 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 4639 | psa_key_slot_t *slot; |
Gilles Peskine | ea0fb49 | 2018-07-12 17:17:20 +0200 | [diff] [blame] | 4640 | psa_status_t status; |
| 4641 | |
| 4642 | if( generator->alg != 0 ) |
| 4643 | return( PSA_ERROR_BAD_STATE ); |
| 4644 | |
Gilles Peskine | cce18ae | 2018-09-18 12:03:52 +0200 | [diff] [blame] | 4645 | /* Make sure that alg is a key derivation algorithm. This prevents |
| 4646 | * key selection algorithms, which psa_key_derivation_internal |
| 4647 | * accepts for the sake of key agreement. */ |
Gilles Peskine | ea0fb49 | 2018-07-12 17:17:20 +0200 | [diff] [blame] | 4648 | if( ! PSA_ALG_IS_KEY_DERIVATION( alg ) ) |
| 4649 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4650 | |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 4651 | status = psa_get_key_from_slot( handle, &slot, PSA_KEY_USAGE_DERIVE, alg ); |
Gilles Peskine | cce18ae | 2018-09-18 12:03:52 +0200 | [diff] [blame] | 4652 | if( status != PSA_SUCCESS ) |
| 4653 | return( status ); |
Gilles Peskine | ea0fb49 | 2018-07-12 17:17:20 +0200 | [diff] [blame] | 4654 | |
Gilles Peskine | cce18ae | 2018-09-18 12:03:52 +0200 | [diff] [blame] | 4655 | if( slot->type != PSA_KEY_TYPE_DERIVE ) |
| 4656 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4657 | |
| 4658 | status = psa_key_derivation_internal( generator, |
| 4659 | slot->data.raw.data, |
| 4660 | slot->data.raw.bytes, |
| 4661 | alg, |
| 4662 | salt, salt_length, |
| 4663 | label, label_length, |
| 4664 | capacity ); |
| 4665 | if( status != PSA_SUCCESS ) |
Gilles Peskine | ea0fb49 | 2018-07-12 17:17:20 +0200 | [diff] [blame] | 4666 | psa_generator_abort( generator ); |
| 4667 | return( status ); |
| 4668 | } |
| 4669 | |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4670 | static psa_status_t psa_key_derivation_setup_kdf( |
| 4671 | psa_crypto_generator_t *generator, |
| 4672 | psa_algorithm_t kdf_alg ) |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4673 | { |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4674 | /* Make sure that kdf_alg is a supported key derivation algorithm. */ |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4675 | #if defined(MBEDTLS_MD_C) |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4676 | if( PSA_ALG_IS_HKDF( kdf_alg ) || |
| 4677 | PSA_ALG_IS_TLS12_PRF( kdf_alg ) || |
| 4678 | PSA_ALG_IS_TLS12_PSK_TO_MS( kdf_alg ) ) |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4679 | { |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4680 | psa_algorithm_t hash_alg = PSA_ALG_HKDF_GET_HASH( kdf_alg ); |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4681 | size_t hash_size = PSA_HASH_SIZE( hash_alg ); |
| 4682 | if( hash_size == 0 ) |
| 4683 | return( PSA_ERROR_NOT_SUPPORTED ); |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4684 | if( ( PSA_ALG_IS_TLS12_PRF( kdf_alg ) || |
| 4685 | PSA_ALG_IS_TLS12_PSK_TO_MS( kdf_alg ) ) && |
Gilles Peskine | ab4b201 | 2019-04-12 15:06:27 +0200 | [diff] [blame] | 4686 | ! ( hash_alg == PSA_ALG_SHA_256 || hash_alg == PSA_ALG_SHA_384 ) ) |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4687 | { |
| 4688 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 4689 | } |
| 4690 | generator->capacity = 255 * hash_size; |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4691 | return( PSA_SUCCESS ); |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4692 | } |
| 4693 | #endif /* MBEDTLS_MD_C */ |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4694 | else |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4695 | return( PSA_ERROR_NOT_SUPPORTED ); |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4696 | } |
| 4697 | |
| 4698 | psa_status_t psa_key_derivation_setup( psa_crypto_generator_t *generator, |
| 4699 | psa_algorithm_t alg ) |
| 4700 | { |
| 4701 | psa_status_t status; |
| 4702 | |
| 4703 | if( generator->alg != 0 ) |
| 4704 | return( PSA_ERROR_BAD_STATE ); |
| 4705 | |
Gilles Peskine | 6843c29 | 2019-01-18 16:44:49 +0100 | [diff] [blame] | 4706 | if( PSA_ALG_IS_RAW_KEY_AGREEMENT( alg ) ) |
| 4707 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4708 | else if( PSA_ALG_IS_KEY_AGREEMENT( alg ) ) |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4709 | { |
| 4710 | psa_algorithm_t kdf_alg = PSA_ALG_KEY_AGREEMENT_GET_KDF( alg ); |
Gilles Peskine | 6843c29 | 2019-01-18 16:44:49 +0100 | [diff] [blame] | 4711 | status = psa_key_derivation_setup_kdf( generator, kdf_alg ); |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4712 | } |
| 4713 | else if( PSA_ALG_IS_KEY_DERIVATION( alg ) ) |
| 4714 | { |
| 4715 | status = psa_key_derivation_setup_kdf( generator, alg ); |
| 4716 | } |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4717 | else |
| 4718 | return( PSA_ERROR_INVALID_ARGUMENT ); |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4719 | |
| 4720 | if( status == PSA_SUCCESS ) |
| 4721 | generator->alg = alg; |
| 4722 | return( status ); |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4723 | } |
| 4724 | |
| 4725 | #if defined(MBEDTLS_MD_C) |
| 4726 | static psa_status_t psa_hkdf_input( psa_hkdf_generator_t *hkdf, |
| 4727 | psa_algorithm_t hash_alg, |
| 4728 | psa_key_derivation_step_t step, |
| 4729 | const uint8_t *data, |
| 4730 | size_t data_length ) |
| 4731 | { |
| 4732 | psa_status_t status; |
| 4733 | switch( step ) |
| 4734 | { |
| 4735 | case PSA_KDF_STEP_SALT: |
Gilles Peskine | 2b522db | 2019-04-12 15:11:49 +0200 | [diff] [blame] | 4736 | if( hkdf->state != HKDF_STATE_INIT ) |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4737 | return( PSA_ERROR_BAD_STATE ); |
Gilles Peskine | 2b522db | 2019-04-12 15:11:49 +0200 | [diff] [blame] | 4738 | status = psa_hmac_setup_internal( &hkdf->hmac, |
| 4739 | data, data_length, |
| 4740 | hash_alg ); |
| 4741 | if( status != PSA_SUCCESS ) |
| 4742 | return( status ); |
| 4743 | hkdf->state = HKDF_STATE_STARTED; |
| 4744 | return( PSA_SUCCESS ); |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4745 | case PSA_KDF_STEP_SECRET: |
| 4746 | /* If no salt was provided, use an empty salt. */ |
| 4747 | if( hkdf->state == HKDF_STATE_INIT ) |
| 4748 | { |
| 4749 | status = psa_hmac_setup_internal( &hkdf->hmac, |
| 4750 | NULL, 0, |
Gilles Peskine | f9ee633 | 2019-04-11 21:22:52 +0200 | [diff] [blame] | 4751 | hash_alg ); |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4752 | if( status != PSA_SUCCESS ) |
| 4753 | return( status ); |
| 4754 | hkdf->state = HKDF_STATE_STARTED; |
| 4755 | } |
Gilles Peskine | 2b522db | 2019-04-12 15:11:49 +0200 | [diff] [blame] | 4756 | if( hkdf->state != HKDF_STATE_STARTED ) |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4757 | return( PSA_ERROR_BAD_STATE ); |
Gilles Peskine | 2b522db | 2019-04-12 15:11:49 +0200 | [diff] [blame] | 4758 | status = psa_hash_update( &hkdf->hmac.hash_ctx, |
| 4759 | data, data_length ); |
| 4760 | if( status != PSA_SUCCESS ) |
| 4761 | return( status ); |
| 4762 | status = psa_hmac_finish_internal( &hkdf->hmac, |
| 4763 | hkdf->prk, |
| 4764 | sizeof( hkdf->prk ) ); |
| 4765 | if( status != PSA_SUCCESS ) |
| 4766 | return( status ); |
| 4767 | hkdf->offset_in_block = PSA_HASH_SIZE( hash_alg ); |
| 4768 | hkdf->block_number = 0; |
| 4769 | hkdf->state = HKDF_STATE_KEYED; |
| 4770 | return( PSA_SUCCESS ); |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4771 | case PSA_KDF_STEP_INFO: |
| 4772 | if( hkdf->state == HKDF_STATE_OUTPUT ) |
| 4773 | return( PSA_ERROR_BAD_STATE ); |
| 4774 | if( hkdf->info_set ) |
| 4775 | return( PSA_ERROR_BAD_STATE ); |
| 4776 | hkdf->info_length = data_length; |
| 4777 | if( data_length != 0 ) |
| 4778 | { |
| 4779 | hkdf->info = mbedtls_calloc( 1, data_length ); |
| 4780 | if( hkdf->info == NULL ) |
| 4781 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 4782 | memcpy( hkdf->info, data, data_length ); |
| 4783 | } |
| 4784 | hkdf->info_set = 1; |
| 4785 | return( PSA_SUCCESS ); |
| 4786 | default: |
| 4787 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4788 | } |
| 4789 | } |
| 4790 | #endif /* MBEDTLS_MD_C */ |
| 4791 | |
Gilles Peskine | 6cdfdb7 | 2019-01-08 10:31:27 +0100 | [diff] [blame] | 4792 | static psa_status_t psa_key_derivation_input_raw( |
| 4793 | psa_crypto_generator_t *generator, |
| 4794 | psa_key_derivation_step_t step, |
| 4795 | const uint8_t *data, |
| 4796 | size_t data_length ) |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4797 | { |
| 4798 | psa_status_t status; |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4799 | psa_algorithm_t kdf_alg = psa_generator_get_kdf_alg( generator ); |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4800 | |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4801 | if( kdf_alg == PSA_ALG_SELECT_RAW ) |
| 4802 | { |
| 4803 | if( generator->capacity != 0 ) |
| 4804 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4805 | generator->ctx.buffer.data = mbedtls_calloc( 1, data_length ); |
| 4806 | if( generator->ctx.buffer.data == NULL ) |
| 4807 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 4808 | memcpy( generator->ctx.buffer.data, data, data_length ); |
| 4809 | generator->ctx.buffer.size = data_length; |
| 4810 | generator->capacity = data_length; |
| 4811 | status = PSA_SUCCESS; |
| 4812 | } |
| 4813 | else |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4814 | #if defined(MBEDTLS_MD_C) |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4815 | if( PSA_ALG_IS_HKDF( kdf_alg ) ) |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4816 | { |
| 4817 | status = psa_hkdf_input( &generator->ctx.hkdf, |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4818 | PSA_ALG_HKDF_GET_HASH( kdf_alg ), |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4819 | step, data, data_length ); |
| 4820 | } |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4821 | else |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4822 | #endif /* MBEDTLS_MD_C */ |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4823 | #if defined(MBEDTLS_MD_C) |
| 4824 | /* TLS-1.2 PRF and TLS-1.2 PSK-to-MS are very similar, so share code. */ |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4825 | if( PSA_ALG_IS_TLS12_PRF( kdf_alg ) || |
| 4826 | PSA_ALG_IS_TLS12_PSK_TO_MS( kdf_alg ) ) |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4827 | { |
Gilles Peskine | c88644d | 2019-04-12 15:03:38 +0200 | [diff] [blame] | 4828 | // To do: implement this |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4829 | status = PSA_ERROR_NOT_SUPPORTED; |
| 4830 | } |
| 4831 | else |
| 4832 | #endif /* MBEDTLS_MD_C */ |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4833 | { |
| 4834 | /* This can't happen unless the generator object was not initialized */ |
| 4835 | return( PSA_ERROR_BAD_STATE ); |
| 4836 | } |
| 4837 | |
| 4838 | if( status != PSA_SUCCESS ) |
| 4839 | psa_generator_abort( generator ); |
| 4840 | return( status ); |
| 4841 | } |
| 4842 | |
Gilles Peskine | 6cdfdb7 | 2019-01-08 10:31:27 +0100 | [diff] [blame] | 4843 | psa_status_t psa_key_derivation_input_bytes( psa_crypto_generator_t *generator, |
| 4844 | psa_key_derivation_step_t step, |
| 4845 | const uint8_t *data, |
| 4846 | size_t data_length ) |
| 4847 | { |
| 4848 | switch( step ) |
| 4849 | { |
| 4850 | case PSA_KDF_STEP_LABEL: |
| 4851 | case PSA_KDF_STEP_SALT: |
| 4852 | case PSA_KDF_STEP_INFO: |
| 4853 | return( psa_key_derivation_input_raw( generator, step, |
| 4854 | data, data_length ) ); |
| 4855 | default: |
| 4856 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4857 | } |
| 4858 | } |
| 4859 | |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4860 | psa_status_t psa_key_derivation_input_key( psa_crypto_generator_t *generator, |
| 4861 | psa_key_derivation_step_t step, |
| 4862 | psa_key_handle_t handle ) |
| 4863 | { |
| 4864 | psa_key_slot_t *slot; |
| 4865 | psa_status_t status; |
| 4866 | status = psa_get_key_from_slot( handle, &slot, |
| 4867 | PSA_KEY_USAGE_DERIVE, |
| 4868 | generator->alg ); |
| 4869 | if( status != PSA_SUCCESS ) |
| 4870 | return( status ); |
| 4871 | if( slot->type != PSA_KEY_TYPE_DERIVE ) |
| 4872 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4873 | /* Don't allow a key to be used as an input that is usually public. |
| 4874 | * This is debatable. It's ok from a cryptographic perspective to |
| 4875 | * use secret material as an input that is usually public. However |
Gilles Peskine | 6cdfdb7 | 2019-01-08 10:31:27 +0100 | [diff] [blame] | 4876 | * the material should be dedicated to a particular input step, |
| 4877 | * otherwise this may allow the key to be used in an unintended way |
| 4878 | * and leak values derived from the key. So be conservative. */ |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4879 | if( step != PSA_KDF_STEP_SECRET ) |
| 4880 | return( PSA_ERROR_INVALID_ARGUMENT ); |
Gilles Peskine | 6cdfdb7 | 2019-01-08 10:31:27 +0100 | [diff] [blame] | 4881 | return( psa_key_derivation_input_raw( generator, |
| 4882 | step, |
| 4883 | slot->data.raw.data, |
| 4884 | slot->data.raw.bytes ) ); |
Gilles Peskine | b70a0fd | 2019-01-07 22:59:38 +0100 | [diff] [blame] | 4885 | } |
| 4886 | |
Gilles Peskine | ea0fb49 | 2018-07-12 17:17:20 +0200 | [diff] [blame] | 4887 | |
| 4888 | |
| 4889 | /****************************************************************/ |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 4890 | /* Key agreement */ |
| 4891 | /****************************************************************/ |
| 4892 | |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 4893 | #if defined(MBEDTLS_ECDH_C) |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 4894 | static psa_status_t psa_key_agreement_ecdh( const uint8_t *peer_key, |
| 4895 | size_t peer_key_length, |
| 4896 | const mbedtls_ecp_keypair *our_key, |
| 4897 | uint8_t *shared_secret, |
| 4898 | size_t shared_secret_size, |
| 4899 | size_t *shared_secret_length ) |
| 4900 | { |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 4901 | mbedtls_ecp_keypair *their_key = NULL; |
| 4902 | mbedtls_ecdh_context ecdh; |
Jaeden Amero | 1e5c2bd | 2019-01-10 19:38:51 +0000 | [diff] [blame] | 4903 | psa_status_t status; |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 4904 | mbedtls_ecdh_init( &ecdh ); |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 4905 | |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 4906 | status = psa_import_ec_public_key( |
| 4907 | mbedtls_ecc_group_to_psa( our_key->grp.id ), |
| 4908 | peer_key, peer_key_length, |
| 4909 | &their_key ); |
Jaeden Amero | 1e5c2bd | 2019-01-10 19:38:51 +0000 | [diff] [blame] | 4910 | if( status != PSA_SUCCESS ) |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 4911 | goto exit; |
Gilles Peskine | b408661 | 2018-11-14 20:51:23 +0100 | [diff] [blame] | 4912 | |
Jaeden Amero | 1e5c2bd | 2019-01-10 19:38:51 +0000 | [diff] [blame] | 4913 | status = mbedtls_to_psa_error( |
| 4914 | mbedtls_ecdh_get_params( &ecdh, their_key, MBEDTLS_ECDH_THEIRS ) ); |
| 4915 | if( status != PSA_SUCCESS ) |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 4916 | goto exit; |
Jaeden Amero | 1e5c2bd | 2019-01-10 19:38:51 +0000 | [diff] [blame] | 4917 | status = mbedtls_to_psa_error( |
| 4918 | mbedtls_ecdh_get_params( &ecdh, our_key, MBEDTLS_ECDH_OURS ) ); |
| 4919 | if( status != PSA_SUCCESS ) |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 4920 | goto exit; |
| 4921 | |
Jaeden Amero | 1e5c2bd | 2019-01-10 19:38:51 +0000 | [diff] [blame] | 4922 | status = mbedtls_to_psa_error( |
| 4923 | mbedtls_ecdh_calc_secret( &ecdh, |
| 4924 | shared_secret_length, |
| 4925 | shared_secret, shared_secret_size, |
| 4926 | mbedtls_ctr_drbg_random, |
| 4927 | &global_data.ctr_drbg ) ); |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 4928 | |
| 4929 | exit: |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 4930 | mbedtls_ecdh_free( &ecdh ); |
Jaeden Amero | 0ae445f | 2019-01-10 11:42:27 +0000 | [diff] [blame] | 4931 | mbedtls_ecp_keypair_free( their_key ); |
| 4932 | mbedtls_free( their_key ); |
Jaeden Amero | 1e5c2bd | 2019-01-10 19:38:51 +0000 | [diff] [blame] | 4933 | return( status ); |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 4934 | } |
Gilles Peskine | a05219c | 2018-11-16 16:02:56 +0100 | [diff] [blame] | 4935 | #endif /* MBEDTLS_ECDH_C */ |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 4936 | |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 4937 | #define PSA_KEY_AGREEMENT_MAX_SHARED_SECRET_SIZE MBEDTLS_ECP_MAX_BYTES |
| 4938 | |
Gilles Peskine | 0216fe1 | 2019-04-11 21:23:21 +0200 | [diff] [blame] | 4939 | static psa_status_t psa_key_agreement_raw_internal( psa_algorithm_t alg, |
| 4940 | psa_key_slot_t *private_key, |
| 4941 | const uint8_t *peer_key, |
| 4942 | size_t peer_key_length, |
| 4943 | uint8_t *shared_secret, |
| 4944 | size_t shared_secret_size, |
| 4945 | size_t *shared_secret_length ) |
| 4946 | { |
| 4947 | switch( alg ) |
| 4948 | { |
| 4949 | #if defined(MBEDTLS_ECDH_C) |
| 4950 | case PSA_ALG_ECDH: |
| 4951 | if( ! PSA_KEY_TYPE_IS_ECC_KEYPAIR( private_key->type ) ) |
| 4952 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 4953 | return( psa_key_agreement_ecdh( peer_key, peer_key_length, |
| 4954 | private_key->data.ecp, |
| 4955 | shared_secret, shared_secret_size, |
| 4956 | shared_secret_length ) ); |
Gilles Peskine | 0216fe1 | 2019-04-11 21:23:21 +0200 | [diff] [blame] | 4957 | #endif /* MBEDTLS_ECDH_C */ |
| 4958 | default: |
| 4959 | (void) private_key; |
| 4960 | (void) peer_key; |
| 4961 | (void) peer_key_length; |
| 4962 | (void) shared_secret; |
| 4963 | (void) shared_secret_size; |
| 4964 | (void) shared_secret_length; |
| 4965 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 4966 | } |
| 4967 | } |
| 4968 | |
Gilles Peskine | 346797d | 2018-11-16 16:05:06 +0100 | [diff] [blame] | 4969 | /* Note that if this function fails, you must call psa_generator_abort() |
| 4970 | * to potentially free embedded data structures and wipe confidential data. |
| 4971 | */ |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 4972 | static psa_status_t psa_key_agreement_internal( psa_crypto_generator_t *generator, |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4973 | psa_key_derivation_step_t step, |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 4974 | psa_key_slot_t *private_key, |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 4975 | const uint8_t *peer_key, |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4976 | size_t peer_key_length ) |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 4977 | { |
| 4978 | psa_status_t status; |
| 4979 | uint8_t shared_secret[PSA_KEY_AGREEMENT_MAX_SHARED_SECRET_SIZE]; |
| 4980 | size_t shared_secret_length = 0; |
Gilles Peskine | 0216fe1 | 2019-04-11 21:23:21 +0200 | [diff] [blame] | 4981 | psa_algorithm_t ka_alg = PSA_ALG_KEY_AGREEMENT_GET_BASE( generator->alg ); |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 4982 | |
| 4983 | /* Step 1: run the secret agreement algorithm to generate the shared |
| 4984 | * secret. */ |
Gilles Peskine | 0216fe1 | 2019-04-11 21:23:21 +0200 | [diff] [blame] | 4985 | status = psa_key_agreement_raw_internal( ka_alg, |
| 4986 | private_key, |
| 4987 | peer_key, peer_key_length, |
Gilles Peskine | b7ecdf0 | 2018-09-18 12:11:27 +0200 | [diff] [blame] | 4988 | shared_secret, |
| 4989 | sizeof( shared_secret ), |
| 4990 | &shared_secret_length ); |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 4991 | if( status != PSA_SUCCESS ) |
| 4992 | goto exit; |
| 4993 | |
| 4994 | /* Step 2: set up the key derivation to generate key material from |
| 4995 | * the shared secret. */ |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 4996 | status = psa_key_derivation_input_raw( generator, step, |
| 4997 | shared_secret, shared_secret_length ); |
| 4998 | |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 4999 | exit: |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 5000 | mbedtls_platform_zeroize( shared_secret, shared_secret_length ); |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 5001 | return( status ); |
| 5002 | } |
| 5003 | |
| 5004 | psa_status_t psa_key_agreement( psa_crypto_generator_t *generator, |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 5005 | psa_key_derivation_step_t step, |
Gilles Peskine | c5487a8 | 2018-12-03 18:08:14 +0100 | [diff] [blame] | 5006 | psa_key_handle_t private_key, |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 5007 | const uint8_t *peer_key, |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 5008 | size_t peer_key_length ) |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 5009 | { |
Gilles Peskine | 2f060a8 | 2018-12-04 17:12:32 +0100 | [diff] [blame] | 5010 | psa_key_slot_t *slot; |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 5011 | psa_status_t status; |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 5012 | if( ! PSA_ALG_IS_KEY_AGREEMENT( generator->alg ) ) |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 5013 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 5014 | status = psa_get_key_from_slot( private_key, &slot, |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 5015 | PSA_KEY_USAGE_DERIVE, generator->alg ); |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 5016 | if( status != PSA_SUCCESS ) |
| 5017 | return( status ); |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 5018 | status = psa_key_agreement_internal( generator, step, |
Gilles Peskine | 346797d | 2018-11-16 16:05:06 +0100 | [diff] [blame] | 5019 | slot, |
Gilles Peskine | 969c5d6 | 2019-01-16 15:53:06 +0100 | [diff] [blame] | 5020 | peer_key, peer_key_length ); |
Gilles Peskine | 346797d | 2018-11-16 16:05:06 +0100 | [diff] [blame] | 5021 | if( status != PSA_SUCCESS ) |
| 5022 | psa_generator_abort( generator ); |
| 5023 | return( status ); |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 5024 | } |
| 5025 | |
Gilles Peskine | 0216fe1 | 2019-04-11 21:23:21 +0200 | [diff] [blame] | 5026 | psa_status_t psa_key_agreement_raw_shared_secret( psa_algorithm_t alg, |
| 5027 | psa_key_handle_t private_key, |
| 5028 | const uint8_t *peer_key, |
| 5029 | size_t peer_key_length, |
| 5030 | uint8_t *output, |
| 5031 | size_t output_size, |
| 5032 | size_t *output_length ) |
| 5033 | { |
| 5034 | psa_key_slot_t *slot; |
| 5035 | psa_status_t status; |
| 5036 | |
| 5037 | if( ! PSA_ALG_IS_KEY_AGREEMENT( alg ) ) |
| 5038 | { |
| 5039 | status = PSA_ERROR_INVALID_ARGUMENT; |
| 5040 | goto exit; |
| 5041 | } |
| 5042 | status = psa_get_key_from_slot( private_key, &slot, |
| 5043 | PSA_KEY_USAGE_DERIVE, alg ); |
| 5044 | if( status != PSA_SUCCESS ) |
| 5045 | goto exit; |
| 5046 | |
| 5047 | status = psa_key_agreement_raw_internal( alg, slot, |
| 5048 | peer_key, peer_key_length, |
| 5049 | output, output_size, |
| 5050 | output_length ); |
| 5051 | |
| 5052 | exit: |
| 5053 | if( status != PSA_SUCCESS ) |
| 5054 | { |
| 5055 | /* If an error happens and is not handled properly, the output |
| 5056 | * may be used as a key to protect sensitive data. Arrange for such |
| 5057 | * a key to be random, which is likely to result in decryption or |
| 5058 | * verification errors. This is better than filling the buffer with |
| 5059 | * some constant data such as zeros, which would result in the data |
| 5060 | * being protected with a reproducible, easily knowable key. |
| 5061 | */ |
| 5062 | psa_generate_random( output, output_size ); |
| 5063 | *output_length = output_size; |
| 5064 | } |
| 5065 | return( status ); |
| 5066 | } |
Gilles Peskine | 01d718c | 2018-09-18 12:01:02 +0200 | [diff] [blame] | 5067 | |
| 5068 | |
| 5069 | /****************************************************************/ |
Gilles Peskine | eab56e4 | 2018-07-12 17:12:33 +0200 | [diff] [blame] | 5070 | /* Random generation */ |
Gilles Peskine | 05d6989 | 2018-06-19 22:00:52 +0200 | [diff] [blame] | 5071 | /****************************************************************/ |
| 5072 | |
| 5073 | psa_status_t psa_generate_random( uint8_t *output, |
| 5074 | size_t output_size ) |
| 5075 | { |
itayzafrir | 0adf0fc | 2018-09-06 16:24:41 +0300 | [diff] [blame] | 5076 | int ret; |
| 5077 | GUARD_MODULE_INITIALIZED; |
| 5078 | |
| 5079 | ret = mbedtls_ctr_drbg_random( &global_data.ctr_drbg, output, output_size ); |
Gilles Peskine | 05d6989 | 2018-06-19 22:00:52 +0200 | [diff] [blame] | 5080 | return( mbedtls_to_psa_error( ret ) ); |
| 5081 | } |
| 5082 | |
Gilles Peskine | e3dbdd8 | 2019-02-25 11:04:06 +0100 | [diff] [blame] | 5083 | #if defined(MBEDTLS_PSA_INJECT_ENTROPY) |
| 5084 | #include "mbedtls/entropy_poll.h" |
avolinski | 13beb10 | 2018-11-20 16:51:49 +0200 | [diff] [blame] | 5085 | |
Netanel Gonen | 2bcd312 | 2018-11-19 11:53:02 +0200 | [diff] [blame] | 5086 | psa_status_t mbedtls_psa_inject_entropy( const unsigned char *seed, |
| 5087 | size_t seed_size ) |
| 5088 | { |
Netanel Gonen | 2bcd312 | 2018-11-19 11:53:02 +0200 | [diff] [blame] | 5089 | if( global_data.initialized ) |
| 5090 | return( PSA_ERROR_NOT_PERMITTED ); |
Netanel Gonen | 21f37cb | 2018-11-19 11:53:55 +0200 | [diff] [blame] | 5091 | |
| 5092 | if( ( ( seed_size < MBEDTLS_ENTROPY_MIN_PLATFORM ) || |
| 5093 | ( seed_size < MBEDTLS_ENTROPY_BLOCK_SIZE ) ) || |
| 5094 | ( seed_size > MBEDTLS_ENTROPY_MAX_SEED_SIZE ) ) |
| 5095 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 5096 | |
Gilles Peskine | e3dbdd8 | 2019-02-25 11:04:06 +0100 | [diff] [blame] | 5097 | return( mbedtls_psa_storage_inject_entropy( seed, seed_size ) ); |
Netanel Gonen | 2bcd312 | 2018-11-19 11:53:02 +0200 | [diff] [blame] | 5098 | } |
Gilles Peskine | e3dbdd8 | 2019-02-25 11:04:06 +0100 | [diff] [blame] | 5099 | #endif /* MBEDTLS_PSA_INJECT_ENTROPY */ |
Netanel Gonen | 2bcd312 | 2018-11-19 11:53:02 +0200 | [diff] [blame] | 5100 | |
Gilles Peskine | e56e878 | 2019-04-26 17:34:02 +0200 | [diff] [blame^] | 5101 | #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_GENPRIME) |
| 5102 | static psa_status_t psa_read_rsa_exponent( const uint8_t *domain_parameters, |
| 5103 | size_t domain_parameters_size, |
| 5104 | int *exponent ) |
| 5105 | { |
| 5106 | size_t i; |
| 5107 | uint32_t acc = 0; |
| 5108 | |
| 5109 | if( domain_parameters_size == 0 ) |
| 5110 | { |
| 5111 | *exponent = 65537; |
| 5112 | return( PSA_SUCCESS ); |
| 5113 | } |
| 5114 | |
| 5115 | /* Mbed TLS encodes the public exponent as an int. For simplicity, only |
| 5116 | * support values that fit in a 32-bit integer, which is larger than |
| 5117 | * int on just about every platform anyway. */ |
| 5118 | if( domain_parameters_size > sizeof( acc ) ) |
| 5119 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 5120 | for( i = 0; i < domain_parameters_size; i++ ) |
| 5121 | acc = ( acc << 8 ) | domain_parameters[i]; |
| 5122 | if( acc > INT_MAX ) |
| 5123 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 5124 | *exponent = acc; |
| 5125 | return( PSA_SUCCESS ); |
| 5126 | } |
| 5127 | #endif /* MBEDTLS_RSA_C && MBEDTLS_GENPRIME */ |
| 5128 | |
| 5129 | static psa_status_t psa_generate_key_internal( |
| 5130 | psa_key_slot_t *slot, size_t bits, |
| 5131 | const uint8_t *domain_parameters, size_t domain_parameters_size ) |
Gilles Peskine | 05d6989 | 2018-06-19 22:00:52 +0200 | [diff] [blame] | 5132 | { |
Gilles Peskine | ff5f0e7 | 2019-04-18 12:53:30 +0200 | [diff] [blame] | 5133 | psa_key_type_t type = slot->type; |
Gilles Peskine | 12313cd | 2018-06-20 00:20:32 +0200 | [diff] [blame] | 5134 | |
Gilles Peskine | e56e878 | 2019-04-26 17:34:02 +0200 | [diff] [blame^] | 5135 | if( domain_parameters == NULL && domain_parameters_size != 0 ) |
Gilles Peskine | 12313cd | 2018-06-20 00:20:32 +0200 | [diff] [blame] | 5136 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 5137 | |
Gilles Peskine | 48c0ea1 | 2018-06-21 14:15:31 +0200 | [diff] [blame] | 5138 | if( key_type_is_raw_bytes( type ) ) |
Gilles Peskine | 12313cd | 2018-06-20 00:20:32 +0200 | [diff] [blame] | 5139 | { |
Gilles Peskine | ff5f0e7 | 2019-04-18 12:53:30 +0200 | [diff] [blame] | 5140 | psa_status_t status; |
Gilles Peskine | b0b255c | 2018-07-06 17:01:38 +0200 | [diff] [blame] | 5141 | status = prepare_raw_data_slot( type, bits, &slot->data.raw ); |
Gilles Peskine | 12313cd | 2018-06-20 00:20:32 +0200 | [diff] [blame] | 5142 | if( status != PSA_SUCCESS ) |
| 5143 | return( status ); |
| 5144 | status = psa_generate_random( slot->data.raw.data, |
| 5145 | slot->data.raw.bytes ); |
| 5146 | if( status != PSA_SUCCESS ) |
| 5147 | { |
| 5148 | mbedtls_free( slot->data.raw.data ); |
| 5149 | return( status ); |
| 5150 | } |
| 5151 | #if defined(MBEDTLS_DES_C) |
| 5152 | if( type == PSA_KEY_TYPE_DES ) |
Gilles Peskine | 08542d8 | 2018-07-19 17:05:42 +0200 | [diff] [blame] | 5153 | psa_des_set_key_parity( slot->data.raw.data, |
| 5154 | slot->data.raw.bytes ); |
Gilles Peskine | 12313cd | 2018-06-20 00:20:32 +0200 | [diff] [blame] | 5155 | #endif /* MBEDTLS_DES_C */ |
| 5156 | } |
| 5157 | else |
| 5158 | |
| 5159 | #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_GENPRIME) |
| 5160 | if ( type == PSA_KEY_TYPE_RSA_KEYPAIR ) |
| 5161 | { |
| 5162 | mbedtls_rsa_context *rsa; |
| 5163 | int ret; |
Gilles Peskine | e56e878 | 2019-04-26 17:34:02 +0200 | [diff] [blame^] | 5164 | int exponent; |
| 5165 | psa_status_t status; |
Gilles Peskine | af3baab | 2018-06-27 22:55:52 +0200 | [diff] [blame] | 5166 | if( bits > PSA_VENDOR_RSA_MAX_KEY_BITS ) |
| 5167 | return( PSA_ERROR_NOT_SUPPORTED ); |
Gilles Peskine | 86a440b | 2018-11-12 18:39:40 +0100 | [diff] [blame] | 5168 | /* Accept only byte-aligned keys, for the same reasons as |
| 5169 | * in psa_import_rsa_key(). */ |
| 5170 | if( bits % 8 != 0 ) |
| 5171 | return( PSA_ERROR_NOT_SUPPORTED ); |
Gilles Peskine | e56e878 | 2019-04-26 17:34:02 +0200 | [diff] [blame^] | 5172 | status = psa_read_rsa_exponent( domain_parameters, |
| 5173 | domain_parameters_size, |
| 5174 | &exponent ); |
| 5175 | if( status != PSA_SUCCESS ) |
| 5176 | return( status ); |
Gilles Peskine | 12313cd | 2018-06-20 00:20:32 +0200 | [diff] [blame] | 5177 | rsa = mbedtls_calloc( 1, sizeof( *rsa ) ); |
| 5178 | if( rsa == NULL ) |
| 5179 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 5180 | mbedtls_rsa_init( rsa, MBEDTLS_RSA_PKCS_V15, MBEDTLS_MD_NONE ); |
| 5181 | ret = mbedtls_rsa_gen_key( rsa, |
| 5182 | mbedtls_ctr_drbg_random, |
| 5183 | &global_data.ctr_drbg, |
Jaeden Amero | 23bbb75 | 2018-06-26 14:16:54 +0100 | [diff] [blame] | 5184 | (unsigned int) bits, |
Gilles Peskine | 12313cd | 2018-06-20 00:20:32 +0200 | [diff] [blame] | 5185 | exponent ); |
| 5186 | if( ret != 0 ) |
| 5187 | { |
| 5188 | mbedtls_rsa_free( rsa ); |
| 5189 | mbedtls_free( rsa ); |
| 5190 | return( mbedtls_to_psa_error( ret ) ); |
| 5191 | } |
| 5192 | slot->data.rsa = rsa; |
| 5193 | } |
| 5194 | else |
| 5195 | #endif /* MBEDTLS_RSA_C && MBEDTLS_GENPRIME */ |
| 5196 | |
| 5197 | #if defined(MBEDTLS_ECP_C) |
| 5198 | if ( PSA_KEY_TYPE_IS_ECC( type ) && PSA_KEY_TYPE_IS_KEYPAIR( type ) ) |
| 5199 | { |
| 5200 | psa_ecc_curve_t curve = PSA_KEY_TYPE_GET_CURVE( type ); |
| 5201 | mbedtls_ecp_group_id grp_id = mbedtls_ecc_group_of_psa( curve ); |
| 5202 | const mbedtls_ecp_curve_info *curve_info = |
| 5203 | mbedtls_ecp_curve_info_from_grp_id( grp_id ); |
| 5204 | mbedtls_ecp_keypair *ecp; |
| 5205 | int ret; |
Gilles Peskine | e56e878 | 2019-04-26 17:34:02 +0200 | [diff] [blame^] | 5206 | if( domain_parameters_size != 0 ) |
Gilles Peskine | 12313cd | 2018-06-20 00:20:32 +0200 | [diff] [blame] | 5207 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 5208 | if( grp_id == MBEDTLS_ECP_DP_NONE || curve_info == NULL ) |
| 5209 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 5210 | if( curve_info->bit_size != bits ) |
| 5211 | return( PSA_ERROR_INVALID_ARGUMENT ); |
| 5212 | ecp = mbedtls_calloc( 1, sizeof( *ecp ) ); |
| 5213 | if( ecp == NULL ) |
| 5214 | return( PSA_ERROR_INSUFFICIENT_MEMORY ); |
| 5215 | mbedtls_ecp_keypair_init( ecp ); |
| 5216 | ret = mbedtls_ecp_gen_key( grp_id, ecp, |
| 5217 | mbedtls_ctr_drbg_random, |
| 5218 | &global_data.ctr_drbg ); |
| 5219 | if( ret != 0 ) |
| 5220 | { |
| 5221 | mbedtls_ecp_keypair_free( ecp ); |
| 5222 | mbedtls_free( ecp ); |
| 5223 | return( mbedtls_to_psa_error( ret ) ); |
| 5224 | } |
| 5225 | slot->data.ecp = ecp; |
| 5226 | } |
| 5227 | else |
| 5228 | #endif /* MBEDTLS_ECP_C */ |
| 5229 | |
| 5230 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 5231 | |
Gilles Peskine | ff5f0e7 | 2019-04-18 12:53:30 +0200 | [diff] [blame] | 5232 | return( PSA_SUCCESS ); |
| 5233 | } |
| 5234 | |
| 5235 | psa_status_t psa_generate_key_to_handle( psa_key_handle_t handle, |
| 5236 | psa_key_type_t type, |
| 5237 | size_t bits, |
| 5238 | const void *extra, |
| 5239 | size_t extra_size ) |
| 5240 | { |
| 5241 | psa_key_slot_t *slot; |
| 5242 | psa_status_t status; |
| 5243 | |
Gilles Peskine | e56e878 | 2019-04-26 17:34:02 +0200 | [diff] [blame^] | 5244 | #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_GENPRIME) |
| 5245 | /* The old public exponent encoding is no longer supported. */ |
| 5246 | if( extra_size != 0 ) |
| 5247 | return( PSA_ERROR_NOT_SUPPORTED ); |
| 5248 | #endif |
| 5249 | |
Gilles Peskine | ff5f0e7 | 2019-04-18 12:53:30 +0200 | [diff] [blame] | 5250 | status = psa_get_empty_key_slot( handle, &slot ); |
| 5251 | if( status != PSA_SUCCESS ) |
| 5252 | return( status ); |
| 5253 | |
Gilles Peskine | 12313cd | 2018-06-20 00:20:32 +0200 | [diff] [blame] | 5254 | slot->type = type; |
Gilles Peskine | ff5f0e7 | 2019-04-18 12:53:30 +0200 | [diff] [blame] | 5255 | status = psa_generate_key_internal( slot, bits, extra, extra_size ); |
| 5256 | if( status != PSA_SUCCESS ) |
| 5257 | slot->type = 0; |
Darryl Green | 0c6575a | 2018-11-07 16:05:30 +0000 | [diff] [blame] | 5258 | |
| 5259 | #if defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) |
| 5260 | if( slot->lifetime == PSA_KEY_LIFETIME_PERSISTENT ) |
| 5261 | { |
Gilles Peskine | 69f976b | 2018-11-30 18:46:56 +0100 | [diff] [blame] | 5262 | return( psa_save_generated_persistent_key( slot, bits ) ); |
Darryl Green | 0c6575a | 2018-11-07 16:05:30 +0000 | [diff] [blame] | 5263 | } |
| 5264 | #endif /* defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) */ |
| 5265 | |
| 5266 | return( status ); |
Gilles Peskine | 05d6989 | 2018-06-19 22:00:52 +0200 | [diff] [blame] | 5267 | } |
| 5268 | |
Gilles Peskine | ff5f0e7 | 2019-04-18 12:53:30 +0200 | [diff] [blame] | 5269 | psa_status_t psa_generate_key( const psa_key_attributes_t *attributes, |
Gilles Peskine | e56e878 | 2019-04-26 17:34:02 +0200 | [diff] [blame^] | 5270 | psa_key_handle_t *handle ) |
Gilles Peskine | ff5f0e7 | 2019-04-18 12:53:30 +0200 | [diff] [blame] | 5271 | { |
| 5272 | psa_status_t status; |
| 5273 | psa_key_slot_t *slot = NULL; |
| 5274 | status = psa_start_key_creation( attributes, handle, &slot ); |
| 5275 | if( status == PSA_SUCCESS ) |
| 5276 | { |
Gilles Peskine | e56e878 | 2019-04-26 17:34:02 +0200 | [diff] [blame^] | 5277 | status = psa_generate_key_internal( |
| 5278 | slot, attributes->bits, |
| 5279 | attributes->domain_parameters, attributes->domain_parameters_size ); |
Gilles Peskine | ff5f0e7 | 2019-04-18 12:53:30 +0200 | [diff] [blame] | 5280 | } |
| 5281 | if( status == PSA_SUCCESS ) |
| 5282 | status = psa_finish_key_creation( slot ); |
| 5283 | if( status != PSA_SUCCESS ) |
| 5284 | { |
| 5285 | psa_fail_key_creation( slot ); |
| 5286 | *handle = 0; |
| 5287 | } |
| 5288 | return( status ); |
| 5289 | } |
| 5290 | |
| 5291 | |
Gilles Peskine | 05d6989 | 2018-06-19 22:00:52 +0200 | [diff] [blame] | 5292 | |
| 5293 | /****************************************************************/ |
Gilles Peskine | 2f9c4dc | 2018-01-28 13:16:24 +0100 | [diff] [blame] | 5294 | /* Module setup */ |
| 5295 | /****************************************************************/ |
| 5296 | |
Gilles Peskine | 5e76952 | 2018-11-20 21:59:56 +0100 | [diff] [blame] | 5297 | psa_status_t mbedtls_psa_crypto_configure_entropy_sources( |
| 5298 | void (* entropy_init )( mbedtls_entropy_context *ctx ), |
| 5299 | void (* entropy_free )( mbedtls_entropy_context *ctx ) ) |
| 5300 | { |
| 5301 | if( global_data.rng_state != RNG_NOT_INITIALIZED ) |
| 5302 | return( PSA_ERROR_BAD_STATE ); |
| 5303 | global_data.entropy_init = entropy_init; |
| 5304 | global_data.entropy_free = entropy_free; |
| 5305 | return( PSA_SUCCESS ); |
| 5306 | } |
| 5307 | |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 5308 | void mbedtls_psa_crypto_free( void ) |
| 5309 | { |
Gilles Peskine | 66fb126 | 2018-12-10 16:29:04 +0100 | [diff] [blame] | 5310 | psa_wipe_all_key_slots( ); |
Gilles Peskine | c6b6907 | 2018-11-20 21:42:52 +0100 | [diff] [blame] | 5311 | if( global_data.rng_state != RNG_NOT_INITIALIZED ) |
| 5312 | { |
| 5313 | mbedtls_ctr_drbg_free( &global_data.ctr_drbg ); |
Gilles Peskine | 5e76952 | 2018-11-20 21:59:56 +0100 | [diff] [blame] | 5314 | global_data.entropy_free( &global_data.entropy ); |
Gilles Peskine | c6b6907 | 2018-11-20 21:42:52 +0100 | [diff] [blame] | 5315 | } |
| 5316 | /* Wipe all remaining data, including configuration. |
| 5317 | * In particular, this sets all state indicator to the value |
| 5318 | * indicating "uninitialized". */ |
Gilles Peskine | 3f10812 | 2018-12-07 18:14:53 +0100 | [diff] [blame] | 5319 | mbedtls_platform_zeroize( &global_data, sizeof( global_data ) ); |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 5320 | } |
| 5321 | |
| 5322 | psa_status_t psa_crypto_init( void ) |
| 5323 | { |
Gilles Peskine | 66fb126 | 2018-12-10 16:29:04 +0100 | [diff] [blame] | 5324 | psa_status_t status; |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 5325 | const unsigned char drbg_seed[] = "PSA"; |
| 5326 | |
Gilles Peskine | c6b6907 | 2018-11-20 21:42:52 +0100 | [diff] [blame] | 5327 | /* Double initialization is explicitly allowed. */ |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 5328 | if( global_data.initialized != 0 ) |
| 5329 | return( PSA_SUCCESS ); |
| 5330 | |
Gilles Peskine | 5e76952 | 2018-11-20 21:59:56 +0100 | [diff] [blame] | 5331 | /* Set default configuration if |
| 5332 | * mbedtls_psa_crypto_configure_entropy_sources() hasn't been called. */ |
| 5333 | if( global_data.entropy_init == NULL ) |
| 5334 | global_data.entropy_init = mbedtls_entropy_init; |
| 5335 | if( global_data.entropy_free == NULL ) |
| 5336 | global_data.entropy_free = mbedtls_entropy_free; |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 5337 | |
Gilles Peskine | c6b6907 | 2018-11-20 21:42:52 +0100 | [diff] [blame] | 5338 | /* Initialize the random generator. */ |
Gilles Peskine | 5e76952 | 2018-11-20 21:59:56 +0100 | [diff] [blame] | 5339 | global_data.entropy_init( &global_data.entropy ); |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 5340 | mbedtls_ctr_drbg_init( &global_data.ctr_drbg ); |
Gilles Peskine | c6b6907 | 2018-11-20 21:42:52 +0100 | [diff] [blame] | 5341 | global_data.rng_state = RNG_INITIALIZED; |
Gilles Peskine | 66fb126 | 2018-12-10 16:29:04 +0100 | [diff] [blame] | 5342 | status = mbedtls_to_psa_error( |
| 5343 | mbedtls_ctr_drbg_seed( &global_data.ctr_drbg, |
| 5344 | mbedtls_entropy_func, |
| 5345 | &global_data.entropy, |
| 5346 | drbg_seed, sizeof( drbg_seed ) - 1 ) ); |
| 5347 | if( status != PSA_SUCCESS ) |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 5348 | goto exit; |
Gilles Peskine | c6b6907 | 2018-11-20 21:42:52 +0100 | [diff] [blame] | 5349 | global_data.rng_state = RNG_SEEDED; |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 5350 | |
Gilles Peskine | 66fb126 | 2018-12-10 16:29:04 +0100 | [diff] [blame] | 5351 | status = psa_initialize_key_slots( ); |
| 5352 | if( status != PSA_SUCCESS ) |
| 5353 | goto exit; |
Gilles Peskine | c6b6907 | 2018-11-20 21:42:52 +0100 | [diff] [blame] | 5354 | |
| 5355 | /* All done. */ |
Gilles Peskine | e4ebc12 | 2018-03-07 14:16:44 +0100 | [diff] [blame] | 5356 | global_data.initialized = 1; |
| 5357 | |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 5358 | exit: |
Gilles Peskine | 66fb126 | 2018-12-10 16:29:04 +0100 | [diff] [blame] | 5359 | if( status != PSA_SUCCESS ) |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 5360 | mbedtls_psa_crypto_free( ); |
Gilles Peskine | 66fb126 | 2018-12-10 16:29:04 +0100 | [diff] [blame] | 5361 | return( status ); |
Gilles Peskine | e59236f | 2018-01-27 23:32:46 +0100 | [diff] [blame] | 5362 | } |
| 5363 | |
| 5364 | #endif /* MBEDTLS_PSA_CRYPTO_C */ |