| /* |
| * Public Key abstraction layer: wrapper functions |
| * |
| * Copyright The Mbed TLS Contributors |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| * not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "common.h" |
| |
| #include "mbedtls/platform_util.h" |
| |
| #if defined(MBEDTLS_PK_C) |
| #include "pk_wrap.h" |
| #include "pk_internal.h" |
| #include "mbedtls/error.h" |
| #include "md_psa.h" |
| |
| /* Even if RSA not activated, for the sake of RSA-alt */ |
| #include "mbedtls/rsa.h" |
| |
| #if defined(MBEDTLS_ECP_C) |
| #include "mbedtls/ecp.h" |
| #endif |
| |
| #if defined(MBEDTLS_ECDSA_C) |
| #include "mbedtls/ecdsa.h" |
| #endif |
| |
| #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PSA_CRYPTO_C) |
| #include "pkwrite.h" |
| #endif |
| |
| #if defined(MBEDTLS_PSA_CRYPTO_C) |
| #include "psa_util_internal.h" |
| #endif |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| #include "psa/crypto.h" |
| |
| #if defined(MBEDTLS_PK_CAN_ECDSA_SOME) |
| #include "mbedtls/asn1write.h" |
| #include "mbedtls/asn1.h" |
| #endif |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #include "mbedtls/platform.h" |
| |
| #include <limits.h> |
| #include <stdint.h> |
| #include <string.h> |
| |
| #if !defined(MBEDTLS_DEPRECATED_REMOVED) |
| #if defined(MBEDTLS_PSA_CRYPTO_C) |
| int mbedtls_pk_error_from_psa(psa_status_t status) |
| { |
| switch (status) { |
| case PSA_SUCCESS: |
| return 0; |
| case PSA_ERROR_INVALID_HANDLE: |
| return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT; |
| case PSA_ERROR_NOT_PERMITTED: |
| return MBEDTLS_ERR_ERROR_GENERIC_ERROR; |
| case PSA_ERROR_BUFFER_TOO_SMALL: |
| return MBEDTLS_ERR_PK_BUFFER_TOO_SMALL; |
| case PSA_ERROR_NOT_SUPPORTED: |
| return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE; |
| case PSA_ERROR_INVALID_ARGUMENT: |
| return MBEDTLS_ERR_PK_INVALID_ALG; |
| case PSA_ERROR_INSUFFICIENT_MEMORY: |
| return MBEDTLS_ERR_PK_ALLOC_FAILED; |
| case PSA_ERROR_BAD_STATE: |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| case PSA_ERROR_COMMUNICATION_FAILURE: |
| case PSA_ERROR_HARDWARE_FAILURE: |
| return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED; |
| case PSA_ERROR_DATA_CORRUPT: |
| case PSA_ERROR_DATA_INVALID: |
| case PSA_ERROR_STORAGE_FAILURE: |
| return MBEDTLS_ERR_PK_FILE_IO_ERROR; |
| case PSA_ERROR_CORRUPTION_DETECTED: |
| return MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| default: |
| return MBEDTLS_ERR_ERROR_GENERIC_ERROR; |
| } |
| } |
| |
| #if defined(PSA_WANT_KEY_TYPE_RSA_PUBLIC_KEY) || \ |
| defined(PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC) |
| int mbedtls_pk_error_from_psa_rsa(psa_status_t status) |
| { |
| switch (status) { |
| case PSA_ERROR_NOT_PERMITTED: |
| case PSA_ERROR_INVALID_ARGUMENT: |
| case PSA_ERROR_INVALID_HANDLE: |
| return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; |
| case PSA_ERROR_BUFFER_TOO_SMALL: |
| return MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE; |
| case PSA_ERROR_INSUFFICIENT_ENTROPY: |
| return MBEDTLS_ERR_RSA_RNG_FAILED; |
| case PSA_ERROR_INVALID_SIGNATURE: |
| return MBEDTLS_ERR_RSA_VERIFY_FAILED; |
| case PSA_ERROR_INVALID_PADDING: |
| return MBEDTLS_ERR_RSA_INVALID_PADDING; |
| case PSA_SUCCESS: |
| return 0; |
| case PSA_ERROR_NOT_SUPPORTED: |
| return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE; |
| case PSA_ERROR_INSUFFICIENT_MEMORY: |
| return MBEDTLS_ERR_PK_ALLOC_FAILED; |
| case PSA_ERROR_BAD_STATE: |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| case PSA_ERROR_COMMUNICATION_FAILURE: |
| case PSA_ERROR_HARDWARE_FAILURE: |
| return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED; |
| case PSA_ERROR_DATA_CORRUPT: |
| case PSA_ERROR_DATA_INVALID: |
| case PSA_ERROR_STORAGE_FAILURE: |
| return MBEDTLS_ERR_PK_FILE_IO_ERROR; |
| case PSA_ERROR_CORRUPTION_DETECTED: |
| return MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| default: |
| return MBEDTLS_ERR_ERROR_GENERIC_ERROR; |
| } |
| } |
| #endif /* PSA_WANT_KEY_TYPE_RSA_PUBLIC_KEY || PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC */ |
| #endif /* MBEDTLS_PSA_CRYPTO_C */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| #if defined(PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY) |
| int mbedtls_pk_error_from_psa_ecdsa(psa_status_t status) |
| { |
| switch (status) { |
| case PSA_ERROR_NOT_PERMITTED: |
| case PSA_ERROR_INVALID_ARGUMENT: |
| return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; |
| case PSA_ERROR_INVALID_HANDLE: |
| return MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE; |
| case PSA_ERROR_BUFFER_TOO_SMALL: |
| return MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL; |
| case PSA_ERROR_INSUFFICIENT_ENTROPY: |
| return MBEDTLS_ERR_ECP_RANDOM_FAILED; |
| case PSA_ERROR_INVALID_SIGNATURE: |
| return MBEDTLS_ERR_ECP_VERIFY_FAILED; |
| case PSA_SUCCESS: |
| return 0; |
| case PSA_ERROR_NOT_SUPPORTED: |
| return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE; |
| case PSA_ERROR_INSUFFICIENT_MEMORY: |
| return MBEDTLS_ERR_PK_ALLOC_FAILED; |
| case PSA_ERROR_BAD_STATE: |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| case PSA_ERROR_COMMUNICATION_FAILURE: |
| case PSA_ERROR_HARDWARE_FAILURE: |
| return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED; |
| case PSA_ERROR_DATA_CORRUPT: |
| case PSA_ERROR_DATA_INVALID: |
| case PSA_ERROR_STORAGE_FAILURE: |
| return MBEDTLS_ERR_PK_FILE_IO_ERROR; |
| case PSA_ERROR_CORRUPTION_DETECTED: |
| return MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| default: |
| return MBEDTLS_ERR_ERROR_GENERIC_ERROR; |
| } |
| } |
| #endif /* PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY */ |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| #endif /* !MBEDTLS_DEPRECATED_REMOVED */ |
| |
| #if defined(MBEDTLS_RSA_C) |
| static int rsa_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_RSA || |
| type == MBEDTLS_PK_RSASSA_PSS; |
| } |
| |
| static size_t rsa_get_bitlen(mbedtls_pk_context *pk) |
| { |
| const mbedtls_rsa_context *rsa = (const mbedtls_rsa_context *) pk->pk_ctx; |
| return 8 * mbedtls_rsa_get_len(rsa); |
| } |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| static int rsa_verify_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_status_t status; |
| mbedtls_pk_context key; |
| int key_len; |
| unsigned char buf[MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES]; |
| psa_algorithm_t psa_alg_md = |
| PSA_ALG_RSA_PKCS1V15_SIGN(mbedtls_md_psa_alg_from_type(md_alg)); |
| size_t rsa_len = mbedtls_rsa_get_len(rsa); |
| |
| if (md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| if (sig_len < rsa_len) { |
| return MBEDTLS_ERR_RSA_VERIFY_FAILED; |
| } |
| |
| /* mbedtls_pk_write_pubkey_der() expects a full PK context; |
| * re-construct one to make it happy */ |
| key.pk_info = &mbedtls_rsa_info; |
| key.pk_ctx = rsa; |
| key_len = mbedtls_pk_write_pubkey_der(&key, buf, sizeof(buf)); |
| if (key_len <= 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_HASH); |
| psa_set_key_algorithm(&attributes, psa_alg_md); |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_PUBLIC_KEY); |
| |
| status = psa_import_key(&attributes, |
| buf + sizeof(buf) - key_len, key_len, |
| &key_id); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| status = psa_verify_hash(key_id, psa_alg_md, hash, hash_len, |
| sig, sig_len); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_RSA_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| ret = 0; |
| |
| cleanup: |
| status = psa_destroy_key(key_id); |
| if (ret == 0 && status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| return ret; |
| } |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int rsa_verify_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| size_t rsa_len = mbedtls_rsa_get_len(rsa); |
| |
| if (md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| if (sig_len < rsa_len) { |
| return MBEDTLS_ERR_RSA_VERIFY_FAILED; |
| } |
| |
| if ((ret = mbedtls_rsa_pkcs1_verify(rsa, md_alg, |
| (unsigned int) hash_len, |
| hash, sig)) != 0) { |
| return ret; |
| } |
| |
| /* The buffer contains a valid signature followed by extra data. |
| * We have a special error code for that so that so that callers can |
| * use mbedtls_pk_verify() to check "Does the buffer start with a |
| * valid signature?" and not just "Does the buffer contain a valid |
| * signature?". */ |
| if (sig_len > rsa_len) { |
| return MBEDTLS_ERR_PK_SIG_LEN_MISMATCH; |
| } |
| |
| return 0; |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #if defined(MBEDTLS_PSA_CRYPTO_C) |
| int mbedtls_pk_psa_rsa_sign_ext(psa_algorithm_t alg, |
| mbedtls_rsa_context *rsa_ctx, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, |
| size_t *sig_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_status_t status; |
| mbedtls_pk_context key; |
| int key_len; |
| unsigned char *buf = NULL; |
| buf = mbedtls_calloc(1, MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES); |
| if (buf == NULL) { |
| return MBEDTLS_ERR_PK_ALLOC_FAILED; |
| } |
| mbedtls_pk_info_t pk_info = mbedtls_rsa_info; |
| |
| *sig_len = mbedtls_rsa_get_len(rsa_ctx); |
| if (sig_size < *sig_len) { |
| mbedtls_free(buf); |
| return MBEDTLS_ERR_PK_BUFFER_TOO_SMALL; |
| } |
| |
| /* mbedtls_pk_write_key_der() expects a full PK context; |
| * re-construct one to make it happy */ |
| key.pk_info = &pk_info; |
| key.pk_ctx = rsa_ctx; |
| key_len = mbedtls_pk_write_key_der(&key, buf, MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES); |
| if (key_len <= 0) { |
| mbedtls_free(buf); |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH); |
| psa_set_key_algorithm(&attributes, alg); |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_KEY_PAIR); |
| |
| status = psa_import_key(&attributes, |
| buf + MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES - key_len, key_len, |
| &key_id); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| status = psa_sign_hash(key_id, alg, hash, hash_len, |
| sig, sig_size, sig_len); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_RSA_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| ret = 0; |
| |
| cleanup: |
| mbedtls_free(buf); |
| status = psa_destroy_key(key_id); |
| if (ret == 0 && status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| return ret; |
| } |
| #endif /* MBEDTLS_PSA_CRYPTO_C */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| static int rsa_sign_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| ((void) f_rng); |
| ((void) p_rng); |
| |
| psa_algorithm_t psa_md_alg; |
| psa_md_alg = mbedtls_md_psa_alg_from_type(md_alg); |
| if (psa_md_alg == 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| return mbedtls_pk_psa_rsa_sign_ext(PSA_ALG_RSA_PKCS1V15_SIGN( |
| psa_md_alg), |
| pk->pk_ctx, hash, hash_len, |
| sig, sig_size, sig_len); |
| } |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int rsa_sign_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| |
| if (md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| *sig_len = mbedtls_rsa_get_len(rsa); |
| if (sig_size < *sig_len) { |
| return MBEDTLS_ERR_PK_BUFFER_TOO_SMALL; |
| } |
| |
| return mbedtls_rsa_pkcs1_sign(rsa, f_rng, p_rng, |
| md_alg, (unsigned int) hash_len, |
| hash, sig); |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| static int rsa_decrypt_wrap(mbedtls_pk_context *pk, |
| const unsigned char *input, size_t ilen, |
| unsigned char *output, size_t *olen, size_t osize, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_status_t status; |
| mbedtls_pk_context key; |
| int key_len; |
| unsigned char buf[MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES]; |
| |
| ((void) f_rng); |
| ((void) p_rng); |
| |
| #if !defined(MBEDTLS_RSA_ALT) |
| if (rsa->padding != MBEDTLS_RSA_PKCS_V15) { |
| return MBEDTLS_ERR_RSA_INVALID_PADDING; |
| } |
| #endif /* !MBEDTLS_RSA_ALT */ |
| |
| if (ilen != mbedtls_rsa_get_len(rsa)) { |
| return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; |
| } |
| |
| /* mbedtls_pk_write_key_der() expects a full PK context; |
| * re-construct one to make it happy */ |
| key.pk_info = &mbedtls_rsa_info; |
| key.pk_ctx = rsa; |
| key_len = mbedtls_pk_write_key_der(&key, buf, sizeof(buf)); |
| if (key_len <= 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_KEY_PAIR); |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DECRYPT); |
| psa_set_key_algorithm(&attributes, PSA_ALG_RSA_PKCS1V15_CRYPT); |
| |
| status = psa_import_key(&attributes, |
| buf + sizeof(buf) - key_len, key_len, |
| &key_id); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| status = psa_asymmetric_decrypt(key_id, PSA_ALG_RSA_PKCS1V15_CRYPT, |
| input, ilen, |
| NULL, 0, |
| output, osize, olen); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_RSA_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| ret = 0; |
| |
| cleanup: |
| mbedtls_platform_zeroize(buf, sizeof(buf)); |
| status = psa_destroy_key(key_id); |
| if (ret == 0 && status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| return ret; |
| } |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int rsa_decrypt_wrap(mbedtls_pk_context *pk, |
| const unsigned char *input, size_t ilen, |
| unsigned char *output, size_t *olen, size_t osize, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| |
| if (ilen != mbedtls_rsa_get_len(rsa)) { |
| return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; |
| } |
| |
| return mbedtls_rsa_pkcs1_decrypt(rsa, f_rng, p_rng, |
| olen, input, output, osize); |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| static int rsa_encrypt_wrap(mbedtls_pk_context *pk, |
| const unsigned char *input, size_t ilen, |
| unsigned char *output, size_t *olen, size_t osize, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_status_t status; |
| mbedtls_pk_context key; |
| int key_len; |
| unsigned char buf[MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES]; |
| |
| ((void) f_rng); |
| ((void) p_rng); |
| |
| #if !defined(MBEDTLS_RSA_ALT) |
| if (rsa->padding != MBEDTLS_RSA_PKCS_V15) { |
| return MBEDTLS_ERR_RSA_INVALID_PADDING; |
| } |
| #endif |
| |
| if (mbedtls_rsa_get_len(rsa) > osize) { |
| return MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE; |
| } |
| |
| /* mbedtls_pk_write_pubkey_der() expects a full PK context; |
| * re-construct one to make it happy */ |
| key.pk_info = &mbedtls_rsa_info; |
| key.pk_ctx = rsa; |
| key_len = mbedtls_pk_write_pubkey_der(&key, buf, sizeof(buf)); |
| if (key_len <= 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT); |
| psa_set_key_algorithm(&attributes, PSA_ALG_RSA_PKCS1V15_CRYPT); |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_PUBLIC_KEY); |
| |
| status = psa_import_key(&attributes, |
| buf + sizeof(buf) - key_len, key_len, |
| &key_id); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| status = psa_asymmetric_encrypt(key_id, PSA_ALG_RSA_PKCS1V15_CRYPT, |
| input, ilen, |
| NULL, 0, |
| output, osize, olen); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_RSA_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| ret = 0; |
| |
| cleanup: |
| status = psa_destroy_key(key_id); |
| if (ret == 0 && status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| return ret; |
| } |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int rsa_encrypt_wrap(mbedtls_pk_context *pk, |
| const unsigned char *input, size_t ilen, |
| unsigned char *output, size_t *olen, size_t osize, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| *olen = mbedtls_rsa_get_len(rsa); |
| |
| if (*olen > osize) { |
| return MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE; |
| } |
| |
| return mbedtls_rsa_pkcs1_encrypt(rsa, f_rng, p_rng, |
| ilen, input, output); |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| static int rsa_check_pair_wrap(mbedtls_pk_context *pub, mbedtls_pk_context *prv, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng) |
| { |
| (void) f_rng; |
| (void) p_rng; |
| return mbedtls_rsa_check_pub_priv((const mbedtls_rsa_context *) pub->pk_ctx, |
| (const mbedtls_rsa_context *) prv->pk_ctx); |
| } |
| |
| static void *rsa_alloc_wrap(void) |
| { |
| void *ctx = mbedtls_calloc(1, sizeof(mbedtls_rsa_context)); |
| |
| if (ctx != NULL) { |
| mbedtls_rsa_init((mbedtls_rsa_context *) ctx); |
| } |
| |
| return ctx; |
| } |
| |
| static void rsa_free_wrap(void *ctx) |
| { |
| mbedtls_rsa_free((mbedtls_rsa_context *) ctx); |
| mbedtls_free(ctx); |
| } |
| |
| static void rsa_debug(mbedtls_pk_context *pk, mbedtls_pk_debug_item *items) |
| { |
| #if defined(MBEDTLS_RSA_ALT) |
| /* Not supported */ |
| (void) pk; |
| (void) items; |
| #else |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| |
| items->type = MBEDTLS_PK_DEBUG_MPI; |
| items->name = "rsa.N"; |
| items->value = &(rsa->N); |
| |
| items++; |
| |
| items->type = MBEDTLS_PK_DEBUG_MPI; |
| items->name = "rsa.E"; |
| items->value = &(rsa->E); |
| #endif |
| } |
| |
| const mbedtls_pk_info_t mbedtls_rsa_info = { |
| .type = MBEDTLS_PK_RSA, |
| .name = "RSA", |
| .get_bitlen = rsa_get_bitlen, |
| .can_do = rsa_can_do, |
| .verify_func = rsa_verify_wrap, |
| .sign_func = rsa_sign_wrap, |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = NULL, |
| .sign_rs_func = NULL, |
| .rs_alloc_func = NULL, |
| .rs_free_func = NULL, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| .decrypt_func = rsa_decrypt_wrap, |
| .encrypt_func = rsa_encrypt_wrap, |
| .check_pair_func = rsa_check_pair_wrap, |
| .ctx_alloc_func = rsa_alloc_wrap, |
| .ctx_free_func = rsa_free_wrap, |
| .debug_func = rsa_debug, |
| }; |
| #endif /* MBEDTLS_RSA_C */ |
| |
| #if defined(MBEDTLS_PK_HAVE_ECC_KEYS) |
| /* |
| * Generic EC key |
| */ |
| static int eckey_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_ECKEY || |
| type == MBEDTLS_PK_ECKEY_DH || |
| type == MBEDTLS_PK_ECDSA; |
| } |
| |
| static size_t eckey_get_bitlen(mbedtls_pk_context *pk) |
| { |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| return pk->ec_bits; |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| mbedtls_ecp_keypair *ecp = (mbedtls_ecp_keypair *) pk->pk_ctx; |
| return ecp->grp.pbits; |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| } |
| |
| #if defined(MBEDTLS_PK_CAN_ECDSA_VERIFY) |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| /* |
| * An ASN.1 encoded signature is a sequence of two ASN.1 integers. Parse one of |
| * those integers and convert it to the fixed-length encoding expected by PSA. |
| */ |
| static int extract_ecdsa_sig_int(unsigned char **from, const unsigned char *end, |
| unsigned char *to, size_t to_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| size_t unpadded_len, padding_len; |
| |
| if ((ret = mbedtls_asn1_get_tag(from, end, &unpadded_len, |
| MBEDTLS_ASN1_INTEGER)) != 0) { |
| return ret; |
| } |
| |
| while (unpadded_len > 0 && **from == 0x00) { |
| (*from)++; |
| unpadded_len--; |
| } |
| |
| if (unpadded_len > to_len || unpadded_len == 0) { |
| return MBEDTLS_ERR_ASN1_LENGTH_MISMATCH; |
| } |
| |
| padding_len = to_len - unpadded_len; |
| memset(to, 0x00, padding_len); |
| memcpy(to + padding_len, *from, unpadded_len); |
| (*from) += unpadded_len; |
| |
| return 0; |
| } |
| |
| /* |
| * Convert a signature from an ASN.1 sequence of two integers |
| * to a raw {r,s} buffer. Note: the provided sig buffer must be at least |
| * twice as big as int_size. |
| */ |
| static int extract_ecdsa_sig(unsigned char **p, const unsigned char *end, |
| unsigned char *sig, size_t int_size) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| size_t tmp_size; |
| |
| if ((ret = mbedtls_asn1_get_tag(p, end, &tmp_size, |
| MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) { |
| return ret; |
| } |
| |
| /* Extract r */ |
| if ((ret = extract_ecdsa_sig_int(p, end, sig, int_size)) != 0) { |
| return ret; |
| } |
| /* Extract s */ |
| if ((ret = extract_ecdsa_sig_int(p, end, sig + int_size, int_size)) != 0) { |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| /* Common helper for ECDSA verify using PSA functions. */ |
| static int ecdsa_verify_psa(unsigned char *key, size_t key_len, |
| psa_ecc_family_t curve, size_t curve_bits, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_algorithm_t psa_sig_md = PSA_ALG_ECDSA_ANY; |
| size_t signature_len = PSA_ECDSA_SIGNATURE_SIZE(curve_bits); |
| unsigned char extracted_sig[PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE]; |
| unsigned char *p; |
| psa_status_t status; |
| |
| if (curve == 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_ECC_PUBLIC_KEY(curve)); |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_HASH); |
| psa_set_key_algorithm(&attributes, psa_sig_md); |
| |
| status = psa_import_key(&attributes, key, key_len, &key_id); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| if (signature_len > sizeof(extracted_sig)) { |
| ret = MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| goto cleanup; |
| } |
| |
| p = (unsigned char *) sig; |
| /* extract_ecdsa_sig's last parameter is the size |
| * of each integer to be parsed, so it's actually half |
| * the size of the signature. */ |
| if ((ret = extract_ecdsa_sig(&p, sig + sig_len, extracted_sig, |
| signature_len/2)) != 0) { |
| goto cleanup; |
| } |
| |
| status = psa_verify_hash(key_id, psa_sig_md, hash, hash_len, |
| extracted_sig, signature_len); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_ECDSA_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| if (p != sig + sig_len) { |
| ret = MBEDTLS_ERR_PK_SIG_LEN_MISMATCH; |
| goto cleanup; |
| } |
| ret = 0; |
| |
| cleanup: |
| status = psa_destroy_key(key_id); |
| if (ret == 0 && status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| return ret; |
| } |
| |
| static int ecdsa_opaque_verify_wrap(mbedtls_pk_context *pk, |
| mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| (void) md_alg; |
| unsigned char key[MBEDTLS_PK_MAX_EC_PUBKEY_RAW_LEN]; |
| size_t key_len; |
| psa_key_attributes_t key_attr = PSA_KEY_ATTRIBUTES_INIT; |
| psa_ecc_family_t curve; |
| size_t curve_bits; |
| psa_status_t status; |
| |
| status = psa_get_key_attributes(pk->priv_id, &key_attr); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_ECDSA_TO_MBEDTLS_ERR(status); |
| } |
| curve = PSA_KEY_TYPE_ECC_GET_FAMILY(psa_get_key_type(&key_attr)); |
| curve_bits = psa_get_key_bits(&key_attr); |
| psa_reset_key_attributes(&key_attr); |
| |
| status = psa_export_public_key(pk->priv_id, key, sizeof(key), &key_len); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_ECDSA_TO_MBEDTLS_ERR(status); |
| } |
| |
| return ecdsa_verify_psa(key, key_len, curve, curve_bits, |
| hash, hash_len, sig, sig_len); |
| } |
| |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| static int ecdsa_verify_wrap(mbedtls_pk_context *pk, |
| mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| (void) md_alg; |
| psa_ecc_family_t curve = pk->ec_family; |
| size_t curve_bits = pk->ec_bits; |
| |
| return ecdsa_verify_psa(pk->pub_raw, pk->pub_raw_len, curve, curve_bits, |
| hash, hash_len, sig, sig_len); |
| } |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| static int ecdsa_verify_wrap(mbedtls_pk_context *pk, |
| mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| (void) md_alg; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| mbedtls_ecp_keypair *ctx = pk->pk_ctx; |
| unsigned char key[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH]; |
| size_t key_len; |
| size_t curve_bits; |
| psa_ecc_family_t curve = mbedtls_ecc_group_to_psa(ctx->grp.id, &curve_bits); |
| |
| ret = mbedtls_ecp_point_write_binary(&ctx->grp, &ctx->Q, |
| MBEDTLS_ECP_PF_UNCOMPRESSED, |
| &key_len, key, sizeof(key)); |
| if (ret != 0) { |
| return ret; |
| } |
| |
| return ecdsa_verify_psa(key, key_len, curve, curve_bits, |
| hash, hash_len, sig, sig_len); |
| } |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int ecdsa_verify_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| ((void) md_alg); |
| |
| ret = mbedtls_ecdsa_read_signature((mbedtls_ecdsa_context *) pk->pk_ctx, |
| hash, hash_len, sig, sig_len); |
| |
| if (ret == MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH) { |
| return MBEDTLS_ERR_PK_SIG_LEN_MISMATCH; |
| } |
| |
| return ret; |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| #endif /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| |
| #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN) |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| /* |
| * Simultaneously convert and move raw MPI from the beginning of a buffer |
| * to an ASN.1 MPI at the end of the buffer. |
| * See also mbedtls_asn1_write_mpi(). |
| * |
| * p: pointer to the end of the output buffer |
| * start: start of the output buffer, and also of the mpi to write at the end |
| * n_len: length of the mpi to read from start |
| */ |
| static int asn1_write_mpibuf(unsigned char **p, unsigned char *start, |
| size_t n_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| size_t len = 0; |
| |
| if ((size_t) (*p - start) < n_len) { |
| return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; |
| } |
| |
| len = n_len; |
| *p -= len; |
| memmove(*p, start, len); |
| |
| /* ASN.1 DER encoding requires minimal length, so skip leading 0s. |
| * Neither r nor s should be 0, but as a failsafe measure, still detect |
| * that rather than overflowing the buffer in case of a PSA error. */ |
| while (len > 0 && **p == 0x00) { |
| ++(*p); |
| --len; |
| } |
| |
| /* this is only reached if the signature was invalid */ |
| if (len == 0) { |
| return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED; |
| } |
| |
| /* if the msb is 1, ASN.1 requires that we prepend a 0. |
| * Neither r nor s can be 0, so we can assume len > 0 at all times. */ |
| if (**p & 0x80) { |
| if (*p - start < 1) { |
| return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL; |
| } |
| |
| *--(*p) = 0x00; |
| len += 1; |
| } |
| |
| MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, start, len)); |
| MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, start, |
| MBEDTLS_ASN1_INTEGER)); |
| |
| return (int) len; |
| } |
| |
| /* Transcode signature from PSA format to ASN.1 sequence. |
| * See ecdsa_signature_to_asn1 in ecdsa.c, but with byte buffers instead of |
| * MPIs, and in-place. |
| * |
| * [in/out] sig: the signature pre- and post-transcoding |
| * [in/out] sig_len: signature length pre- and post-transcoding |
| * [int] buf_len: the available size the in/out buffer |
| */ |
| static int pk_ecdsa_sig_asn1_from_psa(unsigned char *sig, size_t *sig_len, |
| size_t buf_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| size_t len = 0; |
| const size_t rs_len = *sig_len / 2; |
| unsigned char *p = sig + buf_len; |
| |
| MBEDTLS_ASN1_CHK_ADD(len, asn1_write_mpibuf(&p, sig + rs_len, rs_len)); |
| MBEDTLS_ASN1_CHK_ADD(len, asn1_write_mpibuf(&p, sig, rs_len)); |
| |
| MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(&p, sig, len)); |
| MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(&p, sig, |
| MBEDTLS_ASN1_CONSTRUCTED | |
| MBEDTLS_ASN1_SEQUENCE)); |
| |
| memmove(sig, p, len); |
| *sig_len = len; |
| |
| return 0; |
| } |
| |
| /* Common helper for ECDSA sign using PSA functions. */ |
| static int ecdsa_sign_psa(mbedtls_svc_key_id_t key_id, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| psa_status_t status; |
| psa_algorithm_t psa_sig_md; |
| psa_key_attributes_t key_attr = PSA_KEY_ATTRIBUTES_INIT; |
| psa_algorithm_t alg; |
| |
| status = psa_get_key_attributes(key_id, &key_attr); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_ECDSA_TO_MBEDTLS_ERR(status); |
| } |
| alg = psa_get_key_algorithm(&key_attr); |
| psa_reset_key_attributes(&key_attr); |
| |
| if (PSA_ALG_IS_DETERMINISTIC_ECDSA(alg)) { |
| psa_sig_md = PSA_ALG_DETERMINISTIC_ECDSA(mbedtls_md_psa_alg_from_type(md_alg)); |
| } else { |
| psa_sig_md = PSA_ALG_ECDSA(mbedtls_md_psa_alg_from_type(md_alg)); |
| } |
| |
| status = psa_sign_hash(key_id, psa_sig_md, hash, hash_len, |
| sig, sig_size, sig_len); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_ECDSA_TO_MBEDTLS_ERR(status); |
| } |
| |
| ret = pk_ecdsa_sig_asn1_from_psa(sig, sig_len, sig_size); |
| |
| return ret; |
| } |
| |
| static int ecdsa_opaque_sign_wrap(mbedtls_pk_context *pk, |
| mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, |
| size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng) |
| { |
| ((void) f_rng); |
| ((void) p_rng); |
| |
| return ecdsa_sign_psa(pk->priv_id, md_alg, hash, hash_len, sig, sig_size, |
| sig_len); |
| } |
| |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| /* When PK_USE_PSA_EC_DATA is defined opaque and non-opaque keys end up |
| * using the same function. */ |
| #define ecdsa_sign_wrap ecdsa_opaque_sign_wrap |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| static int ecdsa_sign_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_status_t status; |
| mbedtls_ecp_keypair *ctx = pk->pk_ctx; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| unsigned char buf[MBEDTLS_PSA_MAX_EC_KEY_PAIR_LENGTH]; |
| size_t curve_bits; |
| psa_ecc_family_t curve = |
| mbedtls_ecc_group_to_psa(ctx->grp.id, &curve_bits); |
| size_t key_len = PSA_BITS_TO_BYTES(curve_bits); |
| #if defined(MBEDTLS_ECDSA_DETERMINISTIC) |
| psa_algorithm_t psa_sig_md = |
| PSA_ALG_DETERMINISTIC_ECDSA(mbedtls_md_psa_alg_from_type(md_alg)); |
| #else |
| psa_algorithm_t psa_sig_md = |
| PSA_ALG_ECDSA(mbedtls_md_psa_alg_from_type(md_alg)); |
| #endif |
| ((void) f_rng); |
| ((void) p_rng); |
| |
| if (curve == 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| if (key_len > sizeof(buf)) { |
| return MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| } |
| ret = mbedtls_mpi_write_binary(&ctx->d, buf, key_len); |
| if (ret != 0) { |
| goto cleanup; |
| } |
| |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_ECC_KEY_PAIR(curve)); |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH); |
| psa_set_key_algorithm(&attributes, psa_sig_md); |
| |
| status = psa_import_key(&attributes, buf, key_len, &key_id); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| ret = ecdsa_sign_psa(key_id, md_alg, hash, hash_len, sig, sig_size, sig_len); |
| |
| cleanup: |
| mbedtls_platform_zeroize(buf, sizeof(buf)); |
| status = psa_destroy_key(key_id); |
| if (ret == 0 && status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| return ret; |
| } |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int ecdsa_sign_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| return mbedtls_ecdsa_write_signature((mbedtls_ecdsa_context *) pk->pk_ctx, |
| md_alg, hash, hash_len, |
| sig, sig_size, sig_len, |
| f_rng, p_rng); |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| #endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */ |
| |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| /* Forward declarations */ |
| static int ecdsa_verify_rs_wrap(mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len, |
| void *rs_ctx); |
| |
| static int ecdsa_sign_rs_wrap(mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng, |
| void *rs_ctx); |
| |
| /* |
| * Restart context for ECDSA operations with ECKEY context |
| * |
| * We need to store an actual ECDSA context, as we need to pass the same to |
| * the underlying ecdsa function, so we can't create it on the fly every time. |
| */ |
| typedef struct { |
| mbedtls_ecdsa_restart_ctx ecdsa_rs; |
| mbedtls_ecdsa_context ecdsa_ctx; |
| } eckey_restart_ctx; |
| |
| static void *eckey_rs_alloc(void) |
| { |
| eckey_restart_ctx *rs_ctx; |
| |
| void *ctx = mbedtls_calloc(1, sizeof(eckey_restart_ctx)); |
| |
| if (ctx != NULL) { |
| rs_ctx = ctx; |
| mbedtls_ecdsa_restart_init(&rs_ctx->ecdsa_rs); |
| mbedtls_ecdsa_init(&rs_ctx->ecdsa_ctx); |
| } |
| |
| return ctx; |
| } |
| |
| static void eckey_rs_free(void *ctx) |
| { |
| eckey_restart_ctx *rs_ctx; |
| |
| if (ctx == NULL) { |
| return; |
| } |
| |
| rs_ctx = ctx; |
| mbedtls_ecdsa_restart_free(&rs_ctx->ecdsa_rs); |
| mbedtls_ecdsa_free(&rs_ctx->ecdsa_ctx); |
| |
| mbedtls_free(ctx); |
| } |
| |
| static int eckey_verify_rs_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len, |
| void *rs_ctx) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| eckey_restart_ctx *rs = rs_ctx; |
| |
| /* Should never happen */ |
| if (rs == NULL) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| /* set up our own sub-context if needed (that is, on first run) */ |
| if (rs->ecdsa_ctx.grp.pbits == 0) { |
| MBEDTLS_MPI_CHK(mbedtls_ecdsa_from_keypair(&rs->ecdsa_ctx, pk->pk_ctx)); |
| } |
| |
| MBEDTLS_MPI_CHK(ecdsa_verify_rs_wrap(pk, |
| md_alg, hash, hash_len, |
| sig, sig_len, &rs->ecdsa_rs)); |
| |
| cleanup: |
| return ret; |
| } |
| |
| static int eckey_sign_rs_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng, |
| void *rs_ctx) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| eckey_restart_ctx *rs = rs_ctx; |
| |
| /* Should never happen */ |
| if (rs == NULL) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| /* set up our own sub-context if needed (that is, on first run) */ |
| if (rs->ecdsa_ctx.grp.pbits == 0) { |
| MBEDTLS_MPI_CHK(mbedtls_ecdsa_from_keypair(&rs->ecdsa_ctx, pk->pk_ctx)); |
| } |
| |
| MBEDTLS_MPI_CHK(ecdsa_sign_rs_wrap(pk, md_alg, |
| hash, hash_len, sig, sig_size, sig_len, |
| f_rng, p_rng, &rs->ecdsa_rs)); |
| |
| cleanup: |
| return ret; |
| } |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| static int eckey_check_pair_psa(mbedtls_pk_context *pub, mbedtls_pk_context *prv) |
| { |
| psa_status_t status; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| uint8_t prv_key_buf[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH]; |
| size_t prv_key_len; |
| mbedtls_svc_key_id_t key_id = prv->priv_id; |
| |
| status = psa_export_public_key(key_id, prv_key_buf, sizeof(prv_key_buf), |
| &prv_key_len); |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| if (ret != 0) { |
| return ret; |
| } |
| |
| if (memcmp(prv_key_buf, pub->pub_raw, pub->pub_raw_len) != 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| return 0; |
| } |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| static int eckey_check_pair_psa(mbedtls_pk_context *pub, mbedtls_pk_context *prv) |
| { |
| psa_status_t status; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| uint8_t prv_key_buf[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH]; |
| size_t prv_key_len; |
| psa_status_t destruction_status; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_key_attributes_t key_attr = PSA_KEY_ATTRIBUTES_INIT; |
| uint8_t pub_key_buf[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH]; |
| size_t pub_key_len; |
| size_t curve_bits; |
| const psa_ecc_family_t curve = |
| mbedtls_ecc_group_to_psa(mbedtls_pk_ec_ro(*prv)->grp.id, &curve_bits); |
| const size_t curve_bytes = PSA_BITS_TO_BYTES(curve_bits); |
| |
| if (curve == 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| psa_set_key_type(&key_attr, PSA_KEY_TYPE_ECC_KEY_PAIR(curve)); |
| psa_set_key_usage_flags(&key_attr, PSA_KEY_USAGE_EXPORT); |
| |
| ret = mbedtls_mpi_write_binary(&mbedtls_pk_ec_ro(*prv)->d, |
| prv_key_buf, curve_bytes); |
| if (ret != 0) { |
| mbedtls_platform_zeroize(prv_key_buf, sizeof(prv_key_buf)); |
| return ret; |
| } |
| |
| status = psa_import_key(&key_attr, prv_key_buf, curve_bytes, &key_id); |
| mbedtls_platform_zeroize(prv_key_buf, sizeof(prv_key_buf)); |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| if (ret != 0) { |
| return ret; |
| } |
| |
| // From now on prv_key_buf is used to store the public key of prv. |
| status = psa_export_public_key(key_id, prv_key_buf, sizeof(prv_key_buf), |
| &prv_key_len); |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| destruction_status = psa_destroy_key(key_id); |
| if (ret != 0) { |
| return ret; |
| } else if (destruction_status != PSA_SUCCESS) { |
| return PSA_PK_TO_MBEDTLS_ERR(destruction_status); |
| } |
| |
| ret = mbedtls_ecp_point_write_binary(&mbedtls_pk_ec_rw(*pub)->grp, |
| &mbedtls_pk_ec_rw(*pub)->Q, |
| MBEDTLS_ECP_PF_UNCOMPRESSED, |
| &pub_key_len, pub_key_buf, |
| sizeof(pub_key_buf)); |
| if (ret != 0) { |
| return ret; |
| } |
| |
| if (memcmp(prv_key_buf, pub_key_buf, curve_bytes) != 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| return 0; |
| } |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| |
| static int eckey_check_pair_wrap(mbedtls_pk_context *pub, mbedtls_pk_context *prv, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng) |
| { |
| (void) f_rng; |
| (void) p_rng; |
| return eckey_check_pair_psa(pub, prv); |
| } |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int eckey_check_pair_wrap(mbedtls_pk_context *pub, mbedtls_pk_context *prv, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng) |
| { |
| return mbedtls_ecp_check_pub_priv((const mbedtls_ecp_keypair *) pub->pk_ctx, |
| (const mbedtls_ecp_keypair *) prv->pk_ctx, |
| f_rng, p_rng); |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| /* When PK_USE_PSA_EC_DATA is defined opaque and non-opaque keys end up |
| * using the same function. */ |
| #define ecdsa_opaque_check_pair_wrap eckey_check_pair_wrap |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| static int ecdsa_opaque_check_pair_wrap(mbedtls_pk_context *pub, |
| mbedtls_pk_context *prv, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng) |
| { |
| psa_status_t status; |
| uint8_t exp_pub_key[MBEDTLS_PK_MAX_EC_PUBKEY_RAW_LEN]; |
| size_t exp_pub_key_len = 0; |
| uint8_t pub_key[MBEDTLS_PK_MAX_EC_PUBKEY_RAW_LEN]; |
| size_t pub_key_len = 0; |
| int ret; |
| (void) f_rng; |
| (void) p_rng; |
| |
| status = psa_export_public_key(prv->priv_id, exp_pub_key, sizeof(exp_pub_key), |
| &exp_pub_key_len); |
| if (status != PSA_SUCCESS) { |
| ret = psa_pk_status_to_mbedtls(status); |
| return ret; |
| } |
| ret = mbedtls_ecp_point_write_binary(&(mbedtls_pk_ec_ro(*pub)->grp), |
| &(mbedtls_pk_ec_ro(*pub)->Q), |
| MBEDTLS_ECP_PF_UNCOMPRESSED, |
| &pub_key_len, pub_key, sizeof(pub_key)); |
| if (ret != 0) { |
| return ret; |
| } |
| if ((exp_pub_key_len != pub_key_len) || |
| memcmp(exp_pub_key, pub_key, exp_pub_key_len)) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| return 0; |
| } |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #if !defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| static void *eckey_alloc_wrap(void) |
| { |
| void *ctx = mbedtls_calloc(1, sizeof(mbedtls_ecp_keypair)); |
| |
| if (ctx != NULL) { |
| mbedtls_ecp_keypair_init(ctx); |
| } |
| |
| return ctx; |
| } |
| |
| static void eckey_free_wrap(void *ctx) |
| { |
| mbedtls_ecp_keypair_free((mbedtls_ecp_keypair *) ctx); |
| mbedtls_free(ctx); |
| } |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| |
| static void eckey_debug(mbedtls_pk_context *pk, mbedtls_pk_debug_item *items) |
| { |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| items->type = MBEDTLS_PK_DEBUG_PSA_EC; |
| items->name = "eckey.Q"; |
| items->value = pk; |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| mbedtls_ecp_keypair *ecp = (mbedtls_ecp_keypair *) pk->pk_ctx; |
| items->type = MBEDTLS_PK_DEBUG_ECP; |
| items->name = "eckey.Q"; |
| items->value = &(ecp->Q); |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| } |
| |
| const mbedtls_pk_info_t mbedtls_eckey_info = { |
| .type = MBEDTLS_PK_ECKEY, |
| .name = "EC", |
| .get_bitlen = eckey_get_bitlen, |
| .can_do = eckey_can_do, |
| #if defined(MBEDTLS_PK_CAN_ECDSA_VERIFY) |
| .verify_func = ecdsa_verify_wrap, /* Compatible key structures */ |
| #else /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| .verify_func = NULL, |
| #endif /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN) |
| .sign_func = ecdsa_sign_wrap, /* Compatible key structures */ |
| #else /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| .sign_func = NULL, |
| #endif /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = eckey_verify_rs_wrap, |
| .sign_rs_func = eckey_sign_rs_wrap, |
| .rs_alloc_func = eckey_rs_alloc, |
| .rs_free_func = eckey_rs_free, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| .decrypt_func = NULL, |
| .encrypt_func = NULL, |
| .check_pair_func = eckey_check_pair_wrap, |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| .ctx_alloc_func = NULL, |
| .ctx_free_func = NULL, |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| .ctx_alloc_func = eckey_alloc_wrap, |
| .ctx_free_func = eckey_free_wrap, |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| .debug_func = eckey_debug, |
| }; |
| |
| /* |
| * EC key restricted to ECDH |
| */ |
| static int eckeydh_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_ECKEY || |
| type == MBEDTLS_PK_ECKEY_DH; |
| } |
| |
| const mbedtls_pk_info_t mbedtls_eckeydh_info = { |
| .type = MBEDTLS_PK_ECKEY_DH, |
| .name = "EC_DH", |
| .get_bitlen = eckey_get_bitlen, /* Same underlying key structure */ |
| .can_do = eckeydh_can_do, |
| .verify_func = NULL, |
| .sign_func = NULL, |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = NULL, |
| .sign_rs_func = NULL, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| .decrypt_func = NULL, |
| .encrypt_func = NULL, |
| .check_pair_func = eckey_check_pair_wrap, |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| .ctx_alloc_func = NULL, |
| .ctx_free_func = NULL, |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| .ctx_alloc_func = eckey_alloc_wrap, /* Same underlying key structure */ |
| .ctx_free_func = eckey_free_wrap, /* Same underlying key structure */ |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| .debug_func = eckey_debug, /* Same underlying key structure */ |
| }; |
| |
| #if defined(MBEDTLS_PK_CAN_ECDSA_SOME) |
| static int ecdsa_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_ECDSA; |
| } |
| |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| static int ecdsa_verify_rs_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len, |
| void *rs_ctx) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| ((void) md_alg); |
| |
| ret = mbedtls_ecdsa_read_signature_restartable( |
| (mbedtls_ecdsa_context *) pk->pk_ctx, |
| hash, hash_len, sig, sig_len, |
| (mbedtls_ecdsa_restart_ctx *) rs_ctx); |
| |
| if (ret == MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH) { |
| return MBEDTLS_ERR_PK_SIG_LEN_MISMATCH; |
| } |
| |
| return ret; |
| } |
| |
| static int ecdsa_sign_rs_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng, |
| void *rs_ctx) |
| { |
| return mbedtls_ecdsa_write_signature_restartable( |
| (mbedtls_ecdsa_context *) pk->pk_ctx, |
| md_alg, hash, hash_len, sig, sig_size, sig_len, f_rng, p_rng, |
| (mbedtls_ecdsa_restart_ctx *) rs_ctx); |
| |
| } |
| |
| static void *ecdsa_rs_alloc(void) |
| { |
| void *ctx = mbedtls_calloc(1, sizeof(mbedtls_ecdsa_restart_ctx)); |
| |
| if (ctx != NULL) { |
| mbedtls_ecdsa_restart_init(ctx); |
| } |
| |
| return ctx; |
| } |
| |
| static void ecdsa_rs_free(void *ctx) |
| { |
| mbedtls_ecdsa_restart_free(ctx); |
| mbedtls_free(ctx); |
| } |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| |
| const mbedtls_pk_info_t mbedtls_ecdsa_info = { |
| .type = MBEDTLS_PK_ECDSA, |
| .name = "ECDSA", |
| .get_bitlen = eckey_get_bitlen, /* Compatible key structures */ |
| .can_do = ecdsa_can_do, |
| #if defined(MBEDTLS_PK_CAN_ECDSA_VERIFY) |
| .verify_func = ecdsa_verify_wrap, /* Compatible key structures */ |
| #else /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| .verify_func = NULL, |
| #endif /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN) |
| .sign_func = ecdsa_sign_wrap, /* Compatible key structures */ |
| #else /* MBEDTLS_PK_CAN_ECDSA_SIGN */ |
| .sign_func = NULL, |
| #endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */ |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = ecdsa_verify_rs_wrap, |
| .sign_rs_func = ecdsa_sign_rs_wrap, |
| .rs_alloc_func = ecdsa_rs_alloc, |
| .rs_free_func = ecdsa_rs_free, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| .decrypt_func = NULL, |
| .encrypt_func = NULL, |
| .check_pair_func = eckey_check_pair_wrap, /* Compatible key structures */ |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| .ctx_alloc_func = NULL, |
| .ctx_free_func = NULL, |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| .ctx_alloc_func = eckey_alloc_wrap, /* Compatible key structures */ |
| .ctx_free_func = eckey_free_wrap, /* Compatible key structures */ |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| .debug_func = eckey_debug, /* Compatible key structures */ |
| }; |
| #endif /* MBEDTLS_PK_CAN_ECDSA_SOME */ |
| #endif /* MBEDTLS_PK_HAVE_ECC_KEYS */ |
| |
| #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT) |
| /* |
| * Support for alternative RSA-private implementations |
| */ |
| |
| static int rsa_alt_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_RSA; |
| } |
| |
| static size_t rsa_alt_get_bitlen(mbedtls_pk_context *pk) |
| { |
| const mbedtls_rsa_alt_context *rsa_alt = pk->pk_ctx; |
| |
| return 8 * rsa_alt->key_len_func(rsa_alt->key); |
| } |
| |
| static int rsa_alt_sign_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| mbedtls_rsa_alt_context *rsa_alt = pk->pk_ctx; |
| |
| if (UINT_MAX < hash_len) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| *sig_len = rsa_alt->key_len_func(rsa_alt->key); |
| if (*sig_len > MBEDTLS_PK_SIGNATURE_MAX_SIZE) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| if (*sig_len > sig_size) { |
| return MBEDTLS_ERR_PK_BUFFER_TOO_SMALL; |
| } |
| |
| return rsa_alt->sign_func(rsa_alt->key, f_rng, p_rng, |
| md_alg, (unsigned int) hash_len, hash, sig); |
| } |
| |
| static int rsa_alt_decrypt_wrap(mbedtls_pk_context *pk, |
| const unsigned char *input, size_t ilen, |
| unsigned char *output, size_t *olen, size_t osize, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| mbedtls_rsa_alt_context *rsa_alt = pk->pk_ctx; |
| |
| ((void) f_rng); |
| ((void) p_rng); |
| |
| if (ilen != rsa_alt->key_len_func(rsa_alt->key)) { |
| return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; |
| } |
| |
| return rsa_alt->decrypt_func(rsa_alt->key, |
| olen, input, output, osize); |
| } |
| |
| #if defined(MBEDTLS_RSA_C) |
| static int rsa_alt_check_pair(mbedtls_pk_context *pub, mbedtls_pk_context *prv, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng) |
| { |
| unsigned char sig[MBEDTLS_MPI_MAX_SIZE]; |
| unsigned char hash[32]; |
| size_t sig_len = 0; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| |
| if (rsa_alt_get_bitlen(prv) != rsa_get_bitlen(pub)) { |
| return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED; |
| } |
| |
| memset(hash, 0x2a, sizeof(hash)); |
| |
| if ((ret = rsa_alt_sign_wrap(prv, MBEDTLS_MD_NONE, |
| hash, sizeof(hash), |
| sig, sizeof(sig), &sig_len, |
| f_rng, p_rng)) != 0) { |
| return ret; |
| } |
| |
| if (rsa_verify_wrap(pub, MBEDTLS_MD_NONE, |
| hash, sizeof(hash), sig, sig_len) != 0) { |
| return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED; |
| } |
| |
| return 0; |
| } |
| #endif /* MBEDTLS_RSA_C */ |
| |
| static void *rsa_alt_alloc_wrap(void) |
| { |
| void *ctx = mbedtls_calloc(1, sizeof(mbedtls_rsa_alt_context)); |
| |
| if (ctx != NULL) { |
| memset(ctx, 0, sizeof(mbedtls_rsa_alt_context)); |
| } |
| |
| return ctx; |
| } |
| |
| static void rsa_alt_free_wrap(void *ctx) |
| { |
| mbedtls_zeroize_and_free(ctx, sizeof(mbedtls_rsa_alt_context)); |
| } |
| |
| const mbedtls_pk_info_t mbedtls_rsa_alt_info = { |
| .type = MBEDTLS_PK_RSA_ALT, |
| .name = "RSA-alt", |
| .get_bitlen = rsa_alt_get_bitlen, |
| .can_do = rsa_alt_can_do, |
| .verify_func = NULL, |
| .sign_func = rsa_alt_sign_wrap, |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = NULL, |
| .sign_rs_func = NULL, |
| .rs_alloc_func = NULL, |
| .rs_free_func = NULL, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| .decrypt_func = rsa_alt_decrypt_wrap, |
| .encrypt_func = NULL, |
| #if defined(MBEDTLS_RSA_C) |
| .check_pair_func = rsa_alt_check_pair, |
| #else |
| .check_pair_func = NULL, |
| #endif |
| .ctx_alloc_func = rsa_alt_alloc_wrap, |
| .ctx_free_func = rsa_alt_free_wrap, |
| .debug_func = NULL, |
| }; |
| #endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| static size_t opaque_get_bitlen(mbedtls_pk_context *pk) |
| { |
| size_t bits; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| |
| if (PSA_SUCCESS != psa_get_key_attributes(pk->priv_id, &attributes)) { |
| return 0; |
| } |
| |
| bits = psa_get_key_bits(&attributes); |
| psa_reset_key_attributes(&attributes); |
| return bits; |
| } |
| |
| #if defined(MBEDTLS_PK_HAVE_ECC_KEYS) |
| static int ecdsa_opaque_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_ECKEY || |
| type == MBEDTLS_PK_ECDSA; |
| } |
| |
| const mbedtls_pk_info_t mbedtls_ecdsa_opaque_info = { |
| .type = MBEDTLS_PK_OPAQUE, |
| .name = "Opaque", |
| .get_bitlen = opaque_get_bitlen, |
| .can_do = ecdsa_opaque_can_do, |
| #if defined(MBEDTLS_PK_CAN_ECDSA_VERIFY) |
| .verify_func = ecdsa_opaque_verify_wrap, |
| #else /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| .verify_func = NULL, |
| #endif /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN) |
| .sign_func = ecdsa_opaque_sign_wrap, |
| #else /* MBEDTLS_PK_CAN_ECDSA_SIGN */ |
| .sign_func = NULL, |
| #endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */ |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = NULL, |
| .sign_rs_func = NULL, |
| .rs_alloc_func = NULL, |
| .rs_free_func = NULL, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| .decrypt_func = NULL, |
| .encrypt_func = NULL, |
| .check_pair_func = ecdsa_opaque_check_pair_wrap, |
| .ctx_alloc_func = NULL, |
| .ctx_free_func = NULL, |
| .debug_func = NULL, |
| }; |
| #endif /* MBEDTLS_PK_HAVE_ECC_KEYS */ |
| |
| static int rsa_opaque_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_RSA || |
| type == MBEDTLS_PK_RSASSA_PSS; |
| } |
| |
| #if defined(PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC) |
| static int rsa_opaque_decrypt(mbedtls_pk_context *pk, |
| const unsigned char *input, size_t ilen, |
| unsigned char *output, size_t *olen, size_t osize, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| psa_status_t status; |
| |
| /* PSA has its own RNG */ |
| (void) f_rng; |
| (void) p_rng; |
| |
| status = psa_asymmetric_decrypt(pk->priv_id, PSA_ALG_RSA_PKCS1V15_CRYPT, |
| input, ilen, |
| NULL, 0, |
| output, osize, olen); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_RSA_TO_MBEDTLS_ERR(status); |
| } |
| |
| return 0; |
| } |
| #endif /* PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC */ |
| |
| static int rsa_opaque_sign_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| #if defined(MBEDTLS_RSA_C) |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| psa_algorithm_t alg; |
| psa_key_type_t type; |
| psa_status_t status; |
| |
| /* PSA has its own RNG */ |
| (void) f_rng; |
| (void) p_rng; |
| |
| status = psa_get_key_attributes(pk->priv_id, &attributes); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| type = psa_get_key_type(&attributes); |
| psa_reset_key_attributes(&attributes); |
| |
| if (PSA_KEY_TYPE_IS_RSA(type)) { |
| alg = PSA_ALG_RSA_PKCS1V15_SIGN(mbedtls_md_psa_alg_from_type(md_alg)); |
| } else { |
| return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE; |
| } |
| |
| /* make the signature */ |
| status = psa_sign_hash(pk->priv_id, alg, hash, hash_len, |
| sig, sig_size, sig_len); |
| if (status != PSA_SUCCESS) { |
| if (PSA_KEY_TYPE_IS_RSA(type)) { |
| return PSA_PK_RSA_TO_MBEDTLS_ERR(status); |
| } else { |
| return PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| } |
| |
| return 0; |
| #else /* !MBEDTLS_RSA_C */ |
| ((void) pk); |
| ((void) md_alg); |
| ((void) hash); |
| ((void) hash_len); |
| ((void) sig); |
| ((void) sig_size); |
| ((void) sig_len); |
| ((void) f_rng); |
| ((void) p_rng); |
| return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE; |
| #endif /* !MBEDTLS_RSA_C */ |
| } |
| |
| const mbedtls_pk_info_t mbedtls_rsa_opaque_info = { |
| .type = MBEDTLS_PK_OPAQUE, |
| .name = "Opaque", |
| .get_bitlen = opaque_get_bitlen, |
| .can_do = rsa_opaque_can_do, |
| .verify_func = NULL, |
| .sign_func = rsa_opaque_sign_wrap, |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = NULL, |
| .sign_rs_func = NULL, |
| .rs_alloc_func = NULL, |
| .rs_free_func = NULL, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| #if defined(PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC) |
| .decrypt_func = rsa_opaque_decrypt, |
| #else /* PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC */ |
| .decrypt_func = NULL, |
| #endif /* PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC */ |
| .encrypt_func = NULL, |
| .check_pair_func = NULL, |
| .ctx_alloc_func = NULL, |
| .ctx_free_func = NULL, |
| .debug_func = NULL, |
| }; |
| |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #endif /* MBEDTLS_PK_C */ |