Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 1 | /* |
| 2 | * X.509 Certificate Signing Request writing |
| 3 | * |
Manuel Pégourié-Gonnard | 6fb8187 | 2015-07-27 11:11:48 +0200 | [diff] [blame] | 4 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved |
Manuel Pégourié-Gonnard | 37ff140 | 2015-09-04 14:21:07 +0200 | [diff] [blame] | 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. |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 18 | * |
Manuel Pégourié-Gonnard | fe44643 | 2015-03-06 13:17:10 +0000 | [diff] [blame] | 19 | * This file is part of mbed TLS (https://tls.mbed.org) |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 20 | */ |
| 21 | /* |
| 22 | * References: |
| 23 | * - CSRs: PKCS#10 v1.7 aka RFC 2986 |
| 24 | * - attributes: PKCS#9 v2.0 aka RFC 2985 |
| 25 | */ |
| 26 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 27 | #if !defined(MBEDTLS_CONFIG_FILE) |
Manuel Pégourié-Gonnard | 7f80997 | 2015-03-09 17:05:11 +0000 | [diff] [blame] | 28 | #include "mbedtls/config.h" |
Manuel Pégourié-Gonnard | cef4ad2 | 2014-04-29 12:39:06 +0200 | [diff] [blame] | 29 | #else |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 30 | #include MBEDTLS_CONFIG_FILE |
Manuel Pégourié-Gonnard | cef4ad2 | 2014-04-29 12:39:06 +0200 | [diff] [blame] | 31 | #endif |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 32 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 33 | #if defined(MBEDTLS_X509_CSR_WRITE_C) |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 34 | |
Manuel Pégourié-Gonnard | 7f80997 | 2015-03-09 17:05:11 +0000 | [diff] [blame] | 35 | #include "mbedtls/x509_csr.h" |
| 36 | #include "mbedtls/oid.h" |
| 37 | #include "mbedtls/asn1write.h" |
Andres Amaya Garcia | 1f6301b | 2018-04-17 09:51:09 -0500 | [diff] [blame] | 38 | #include "mbedtls/platform_util.h" |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 39 | |
Rich Evans | 00ab470 | 2015-02-06 13:43:58 +0000 | [diff] [blame] | 40 | #include <string.h> |
| 41 | #include <stdlib.h> |
| 42 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 43 | #if defined(MBEDTLS_PEM_WRITE_C) |
Manuel Pégourié-Gonnard | 7f80997 | 2015-03-09 17:05:11 +0000 | [diff] [blame] | 44 | #include "mbedtls/pem.h" |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 45 | #endif |
| 46 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 47 | void mbedtls_x509write_csr_init( mbedtls_x509write_csr *ctx ) |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 48 | { |
Hanno Becker | 81535d0 | 2017-09-13 15:39:59 +0100 | [diff] [blame] | 49 | memset( ctx, 0, sizeof( mbedtls_x509write_csr ) ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 50 | } |
| 51 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 52 | void mbedtls_x509write_csr_free( mbedtls_x509write_csr *ctx ) |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 53 | { |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 54 | mbedtls_asn1_free_named_data_list( &ctx->subject ); |
| 55 | mbedtls_asn1_free_named_data_list( &ctx->extensions ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 56 | |
Andres Amaya Garcia | 1f6301b | 2018-04-17 09:51:09 -0500 | [diff] [blame] | 57 | mbedtls_platform_zeroize( ctx, sizeof( mbedtls_x509write_csr ) ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 58 | } |
| 59 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 60 | void mbedtls_x509write_csr_set_md_alg( mbedtls_x509write_csr *ctx, mbedtls_md_type_t md_alg ) |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 61 | { |
| 62 | ctx->md_alg = md_alg; |
| 63 | } |
| 64 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 65 | void mbedtls_x509write_csr_set_key( mbedtls_x509write_csr *ctx, mbedtls_pk_context *key ) |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 66 | { |
| 67 | ctx->key = key; |
| 68 | } |
| 69 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 70 | int mbedtls_x509write_csr_set_subject_name( mbedtls_x509write_csr *ctx, |
Paul Bakker | 50dc850 | 2013-10-28 21:19:10 +0100 | [diff] [blame] | 71 | const char *subject_name ) |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 72 | { |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 73 | return mbedtls_x509_string_to_names( &ctx->subject, subject_name ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 74 | } |
| 75 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 76 | int mbedtls_x509write_csr_set_extension( mbedtls_x509write_csr *ctx, |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 77 | const char *oid, size_t oid_len, |
| 78 | const unsigned char *val, size_t val_len ) |
| 79 | { |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 80 | return mbedtls_x509_set_extension( &ctx->extensions, oid, oid_len, |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 81 | 0, val, val_len ); |
| 82 | } |
| 83 | |
Andres Amaya Garcia | d60e378 | 2018-09-26 10:48:24 +0100 | [diff] [blame^] | 84 | static size_t csr_get_unused_bits_for_named_bitstring( unsigned char bitstring, |
| 85 | size_t bit_offset ) |
| 86 | { |
| 87 | size_t unused_bits; |
| 88 | |
| 89 | /* Count the unused bits removing trailing 0s */ |
| 90 | for( unused_bits = bit_offset; unused_bits < 8; unused_bits++ ) |
| 91 | if( ( ( bitstring >> unused_bits ) & 0x1 ) != 0 ) |
| 92 | break; |
| 93 | |
| 94 | return( unused_bits ); |
| 95 | } |
| 96 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 97 | int mbedtls_x509write_csr_set_key_usage( mbedtls_x509write_csr *ctx, unsigned char key_usage ) |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 98 | { |
| 99 | unsigned char buf[4]; |
| 100 | unsigned char *c; |
Andres Amaya Garcia | d60e378 | 2018-09-26 10:48:24 +0100 | [diff] [blame^] | 101 | size_t unused_bits; |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 102 | int ret; |
| 103 | |
| 104 | c = buf + 4; |
| 105 | |
Andres Amaya Garcia | d60e378 | 2018-09-26 10:48:24 +0100 | [diff] [blame^] | 106 | unused_bits = csr_get_unused_bits_for_named_bitstring( key_usage, 0 ); |
| 107 | ret = mbedtls_asn1_write_bitstring( &c, buf, &key_usage, 8 - unused_bits ); |
| 108 | |
| 109 | if( ret < 0 ) |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 110 | return( ret ); |
Andres Amaya Garcia | d60e378 | 2018-09-26 10:48:24 +0100 | [diff] [blame^] | 111 | else if( ret < 3 || ret > 4 ) |
| 112 | return( MBEDTLS_ERR_X509_INVALID_FORMAT ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 113 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 114 | ret = mbedtls_x509write_csr_set_extension( ctx, MBEDTLS_OID_KEY_USAGE, |
| 115 | MBEDTLS_OID_SIZE( MBEDTLS_OID_KEY_USAGE ), |
Andres Amaya Garcia | d60e378 | 2018-09-26 10:48:24 +0100 | [diff] [blame^] | 116 | c, (size_t)ret ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 117 | if( ret != 0 ) |
| 118 | return( ret ); |
| 119 | |
| 120 | return( 0 ); |
| 121 | } |
| 122 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 123 | int mbedtls_x509write_csr_set_ns_cert_type( mbedtls_x509write_csr *ctx, |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 124 | unsigned char ns_cert_type ) |
| 125 | { |
| 126 | unsigned char buf[4]; |
| 127 | unsigned char *c; |
Andres Amaya Garcia | d60e378 | 2018-09-26 10:48:24 +0100 | [diff] [blame^] | 128 | size_t unused_bits; |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 129 | int ret; |
| 130 | |
| 131 | c = buf + 4; |
| 132 | |
Andres Amaya Garcia | d60e378 | 2018-09-26 10:48:24 +0100 | [diff] [blame^] | 133 | unused_bits = csr_get_unused_bits_for_named_bitstring( ns_cert_type, 0 ); |
| 134 | ret = mbedtls_asn1_write_bitstring( &c, |
| 135 | buf, |
| 136 | &ns_cert_type, |
| 137 | 8 - unused_bits ); |
| 138 | |
| 139 | if( ret < 0 ) |
| 140 | return( ret ); |
| 141 | else if( ret < 3 || ret > 4 ) |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 142 | return( ret ); |
| 143 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 144 | ret = mbedtls_x509write_csr_set_extension( ctx, MBEDTLS_OID_NS_CERT_TYPE, |
| 145 | MBEDTLS_OID_SIZE( MBEDTLS_OID_NS_CERT_TYPE ), |
Andres Amaya Garcia | d60e378 | 2018-09-26 10:48:24 +0100 | [diff] [blame^] | 146 | c, (size_t)ret ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 147 | if( ret != 0 ) |
| 148 | return( ret ); |
| 149 | |
| 150 | return( 0 ); |
| 151 | } |
| 152 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 153 | int mbedtls_x509write_csr_der( mbedtls_x509write_csr *ctx, unsigned char *buf, size_t size, |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 154 | int (*f_rng)(void *, unsigned char *, size_t), |
| 155 | void *p_rng ) |
| 156 | { |
| 157 | int ret; |
| 158 | const char *sig_oid; |
| 159 | size_t sig_oid_len = 0; |
| 160 | unsigned char *c, *c2; |
| 161 | unsigned char hash[64]; |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 162 | unsigned char sig[MBEDTLS_MPI_MAX_SIZE]; |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 163 | unsigned char tmp_buf[2048]; |
| 164 | size_t pub_len = 0, sig_and_oid_len = 0, sig_len; |
| 165 | size_t len = 0; |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 166 | mbedtls_pk_type_t pk_alg; |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 167 | |
| 168 | /* |
| 169 | * Prepare data to be signed in tmp_buf |
| 170 | */ |
| 171 | c = tmp_buf + sizeof( tmp_buf ); |
| 172 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 173 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_extensions( &c, tmp_buf, ctx->extensions ) ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 174 | |
| 175 | if( len ) |
| 176 | { |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 177 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) ); |
| 178 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED | |
| 179 | MBEDTLS_ASN1_SEQUENCE ) ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 180 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 181 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) ); |
| 182 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED | |
| 183 | MBEDTLS_ASN1_SET ) ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 184 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 185 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( &c, tmp_buf, MBEDTLS_OID_PKCS9_CSR_EXT_REQ, |
| 186 | MBEDTLS_OID_SIZE( MBEDTLS_OID_PKCS9_CSR_EXT_REQ ) ) ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 187 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 188 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) ); |
| 189 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED | |
| 190 | MBEDTLS_ASN1_SEQUENCE ) ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 191 | } |
| 192 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 193 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) ); |
| 194 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED | |
| 195 | MBEDTLS_ASN1_CONTEXT_SPECIFIC ) ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 196 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 197 | MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_pk_write_pubkey_der( ctx->key, |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 198 | tmp_buf, c - tmp_buf ) ); |
| 199 | c -= pub_len; |
| 200 | len += pub_len; |
| 201 | |
| 202 | /* |
| 203 | * Subject ::= Name |
| 204 | */ |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 205 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_names( &c, tmp_buf, ctx->subject ) ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 206 | |
| 207 | /* |
| 208 | * Version ::= INTEGER { v1(0), v2(1), v3(2) } |
| 209 | */ |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 210 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_int( &c, tmp_buf, 0 ) ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 211 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 212 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) ); |
| 213 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED | |
| 214 | MBEDTLS_ASN1_SEQUENCE ) ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 215 | |
| 216 | /* |
| 217 | * Prepare signature |
| 218 | */ |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 219 | mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 220 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 221 | if( ( ret = mbedtls_pk_sign( ctx->key, ctx->md_alg, hash, 0, sig, &sig_len, |
Hanno Becker | fc77144 | 2017-09-13 08:45:48 +0100 | [diff] [blame] | 222 | f_rng, p_rng ) ) != 0 ) |
| 223 | { |
| 224 | return( ret ); |
| 225 | } |
| 226 | |
| 227 | if( mbedtls_pk_can_do( ctx->key, MBEDTLS_PK_RSA ) ) |
| 228 | pk_alg = MBEDTLS_PK_RSA; |
| 229 | else if( mbedtls_pk_can_do( ctx->key, MBEDTLS_PK_ECDSA ) ) |
| 230 | pk_alg = MBEDTLS_PK_ECDSA; |
| 231 | else |
Hanno Becker | d8a6f7c | 2017-09-22 16:05:43 +0100 | [diff] [blame] | 232 | return( MBEDTLS_ERR_X509_INVALID_ALG ); |
Hanno Becker | fc77144 | 2017-09-13 08:45:48 +0100 | [diff] [blame] | 233 | |
| 234 | if( ( ret = mbedtls_oid_get_oid_by_sig_alg( pk_alg, ctx->md_alg, |
| 235 | &sig_oid, &sig_oid_len ) ) != 0 ) |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 236 | { |
| 237 | return( ret ); |
| 238 | } |
| 239 | |
| 240 | /* |
| 241 | * Write data to output buffer |
| 242 | */ |
| 243 | c2 = buf + size; |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 244 | MBEDTLS_ASN1_CHK_ADD( sig_and_oid_len, mbedtls_x509_write_sig( &c2, buf, |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 245 | sig_oid, sig_oid_len, sig, sig_len ) ); |
| 246 | |
Andres AG | 60dbc93 | 2016-09-02 15:23:48 +0100 | [diff] [blame] | 247 | if( len > (size_t)( c2 - buf ) ) |
| 248 | return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); |
| 249 | |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 250 | c2 -= len; |
| 251 | memcpy( c2, c, len ); |
| 252 | |
| 253 | len += sig_and_oid_len; |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 254 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c2, buf, len ) ); |
| 255 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c2, buf, MBEDTLS_ASN1_CONSTRUCTED | |
| 256 | MBEDTLS_ASN1_SEQUENCE ) ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 257 | |
Paul Bakker | b9cfaa0 | 2013-10-11 18:58:55 +0200 | [diff] [blame] | 258 | return( (int) len ); |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | #define PEM_BEGIN_CSR "-----BEGIN CERTIFICATE REQUEST-----\n" |
| 262 | #define PEM_END_CSR "-----END CERTIFICATE REQUEST-----\n" |
| 263 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 264 | #if defined(MBEDTLS_PEM_WRITE_C) |
| 265 | int mbedtls_x509write_csr_pem( mbedtls_x509write_csr *ctx, unsigned char *buf, size_t size, |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 266 | int (*f_rng)(void *, unsigned char *, size_t), |
| 267 | void *p_rng ) |
| 268 | { |
| 269 | int ret; |
| 270 | unsigned char output_buf[4096]; |
| 271 | size_t olen = 0; |
| 272 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 273 | if( ( ret = mbedtls_x509write_csr_der( ctx, output_buf, sizeof(output_buf), |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 274 | f_rng, p_rng ) ) < 0 ) |
| 275 | { |
| 276 | return( ret ); |
| 277 | } |
| 278 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 279 | if( ( ret = mbedtls_pem_write_buffer( PEM_BEGIN_CSR, PEM_END_CSR, |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 280 | output_buf + sizeof(output_buf) - ret, |
| 281 | ret, buf, size, &olen ) ) != 0 ) |
| 282 | { |
| 283 | return( ret ); |
| 284 | } |
| 285 | |
| 286 | return( 0 ); |
| 287 | } |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 288 | #endif /* MBEDTLS_PEM_WRITE_C */ |
Paul Bakker | 7c6b2c3 | 2013-09-16 13:49:26 +0200 | [diff] [blame] | 289 | |
Manuel Pégourié-Gonnard | 2cf5a7c | 2015-04-08 12:49:31 +0200 | [diff] [blame] | 290 | #endif /* MBEDTLS_X509_CSR_WRITE_C */ |