Eric Tsai / mbedtls

Modified mbed TLS headers for AES functionality only to reduce build size

Dependents:   BLE_Gateway_Linker_fix BLE_Gateway

Fork of mbedtls by sandbox

source/x509_csr.c@5:f09f5ed830ca, 2017-07-10 (annotated)

Committer:
electronichamsters
Date:
Mon Jul 10 04:00:25 2017 +0000
Revision:
5:f09f5ed830ca
Parent:
1:24750b9ad5ef 
working gateway

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Christopher Haster 1:24750b9ad5ef 1 /*
Christopher Haster 1:24750b9ad5ef 2 * X.509 Certificate Signing Request (CSR) parsing
Christopher Haster 1:24750b9ad5ef 3 *
Christopher Haster 1:24750b9ad5ef 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
Christopher Haster 1:24750b9ad5ef 5 * SPDX-License-Identifier: Apache-2.0
Christopher Haster 1:24750b9ad5ef 6 *
Christopher Haster 1:24750b9ad5ef 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
Christopher Haster 1:24750b9ad5ef 8 * not use this file except in compliance with the License.
Christopher Haster 1:24750b9ad5ef 9 * You may obtain a copy of the License at
Christopher Haster 1:24750b9ad5ef 10 *
Christopher Haster 1:24750b9ad5ef 11 * http://www.apache.org/licenses/LICENSE-2.0
Christopher Haster 1:24750b9ad5ef 12 *
Christopher Haster 1:24750b9ad5ef 13 * Unless required by applicable law or agreed to in writing, software
Christopher Haster 1:24750b9ad5ef 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
Christopher Haster 1:24750b9ad5ef 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Christopher Haster 1:24750b9ad5ef 16 * See the License for the specific language governing permissions and
Christopher Haster 1:24750b9ad5ef 17 * limitations under the License.
Christopher Haster 1:24750b9ad5ef 18 *
Christopher Haster 1:24750b9ad5ef 19 * This file is part of mbed TLS (https://tls.mbed.org)
Christopher Haster 1:24750b9ad5ef 20 */
Christopher Haster 1:24750b9ad5ef 21 /*
Christopher Haster 1:24750b9ad5ef 22 * The ITU-T X.509 standard defines a certificate format for PKI.
Christopher Haster 1:24750b9ad5ef 23 *
Christopher Haster 1:24750b9ad5ef 24 * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
Christopher Haster 1:24750b9ad5ef 25 * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
Christopher Haster 1:24750b9ad5ef 26 * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
Christopher Haster 1:24750b9ad5ef 27 *
Christopher Haster 1:24750b9ad5ef 28 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
Christopher Haster 1:24750b9ad5ef 29 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
Christopher Haster 1:24750b9ad5ef 30 */
Christopher Haster 1:24750b9ad5ef 31
Christopher Haster 1:24750b9ad5ef 32 #if !defined(MBEDTLS_CONFIG_FILE)
Christopher Haster 1:24750b9ad5ef 33 #include "mbedtls/config.h"
Christopher Haster 1:24750b9ad5ef 34 #else
Christopher Haster 1:24750b9ad5ef 35 #include MBEDTLS_CONFIG_FILE
Christopher Haster 1:24750b9ad5ef 36 #endif
Christopher Haster 1:24750b9ad5ef 37
Christopher Haster 1:24750b9ad5ef 38 #if defined(MBEDTLS_X509_CSR_PARSE_C)
Christopher Haster 1:24750b9ad5ef 39
Christopher Haster 1:24750b9ad5ef 40 #include "mbedtls/x509_csr.h"
Christopher Haster 1:24750b9ad5ef 41 #include "mbedtls/oid.h"
Christopher Haster 1:24750b9ad5ef 42
Christopher Haster 1:24750b9ad5ef 43 #include <string.h>
Christopher Haster 1:24750b9ad5ef 44
Christopher Haster 1:24750b9ad5ef 45 #if defined(MBEDTLS_PEM_PARSE_C)
Christopher Haster 1:24750b9ad5ef 46 #include "mbedtls/pem.h"
Christopher Haster 1:24750b9ad5ef 47 #endif
Christopher Haster 1:24750b9ad5ef 48
Christopher Haster 1:24750b9ad5ef 49 #if defined(MBEDTLS_PLATFORM_C)
Christopher Haster 1:24750b9ad5ef 50 #include "mbedtls/platform.h"
Christopher Haster 1:24750b9ad5ef 51 #else
Christopher Haster 1:24750b9ad5ef 52 #include <stdlib.h>
Christopher Haster 1:24750b9ad5ef 53 #include <stdio.h>
Christopher Haster 1:24750b9ad5ef 54 #define mbedtls_free free
Christopher Haster 1:24750b9ad5ef 55 #define mbedtls_calloc calloc
Christopher Haster 1:24750b9ad5ef 56 #define mbedtls_snprintf snprintf
Christopher Haster 1:24750b9ad5ef 57 #endif
Christopher Haster 1:24750b9ad5ef 58
Christopher Haster 1:24750b9ad5ef 59 #if defined(MBEDTLS_FS_IO) || defined(EFIX64) || defined(EFI32)
Christopher Haster 1:24750b9ad5ef 60 #include <stdio.h>
Christopher Haster 1:24750b9ad5ef 61 #endif
Christopher Haster 1:24750b9ad5ef 62
Christopher Haster 1:24750b9ad5ef 63 /* Implementation that should never be optimized out by the compiler */
Christopher Haster 1:24750b9ad5ef 64 static void mbedtls_zeroize( void *v, size_t n ) {
Christopher Haster 1:24750b9ad5ef 65 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
Christopher Haster 1:24750b9ad5ef 66 }
Christopher Haster 1:24750b9ad5ef 67
Christopher Haster 1:24750b9ad5ef 68 /*
Christopher Haster 1:24750b9ad5ef 69 * Version ::= INTEGER { v1(0) }
Christopher Haster 1:24750b9ad5ef 70 */
Christopher Haster 1:24750b9ad5ef 71 static int x509_csr_get_version( unsigned char **p,
Christopher Haster 1:24750b9ad5ef 72 const unsigned char *end,
Christopher Haster 1:24750b9ad5ef 73 int *ver )
Christopher Haster 1:24750b9ad5ef 74 {
Christopher Haster 1:24750b9ad5ef 75 int ret;
Christopher Haster 1:24750b9ad5ef 76
Christopher Haster 1:24750b9ad5ef 77 if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 78 {
Christopher Haster 1:24750b9ad5ef 79 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
Christopher Haster 1:24750b9ad5ef 80 {
Christopher Haster 1:24750b9ad5ef 81 *ver = 0;
Christopher Haster 1:24750b9ad5ef 82 return( 0 );
Christopher Haster 1:24750b9ad5ef 83 }
Christopher Haster 1:24750b9ad5ef 84
Christopher Haster 1:24750b9ad5ef 85 return( MBEDTLS_ERR_X509_INVALID_VERSION + ret );
Christopher Haster 1:24750b9ad5ef 86 }
Christopher Haster 1:24750b9ad5ef 87
Christopher Haster 1:24750b9ad5ef 88 return( 0 );
Christopher Haster 1:24750b9ad5ef 89 }
Christopher Haster 1:24750b9ad5ef 90
Christopher Haster 1:24750b9ad5ef 91 /*
Christopher Haster 1:24750b9ad5ef 92 * Parse a CSR in DER format
Christopher Haster 1:24750b9ad5ef 93 */
Christopher Haster 1:24750b9ad5ef 94 int mbedtls_x509_csr_parse_der( mbedtls_x509_csr *csr,
Christopher Haster 1:24750b9ad5ef 95 const unsigned char *buf, size_t buflen )
Christopher Haster 1:24750b9ad5ef 96 {
Christopher Haster 1:24750b9ad5ef 97 int ret;
Christopher Haster 1:24750b9ad5ef 98 size_t len;
Christopher Haster 1:24750b9ad5ef 99 unsigned char *p, *end;
Christopher Haster 1:24750b9ad5ef 100 mbedtls_x509_buf sig_params;
Christopher Haster 1:24750b9ad5ef 101
Christopher Haster 1:24750b9ad5ef 102 memset( &sig_params, 0, sizeof( mbedtls_x509_buf ) );
Christopher Haster 1:24750b9ad5ef 103
Christopher Haster 1:24750b9ad5ef 104 /*
Christopher Haster 1:24750b9ad5ef 105 * Check for valid input
Christopher Haster 1:24750b9ad5ef 106 */
Christopher Haster 1:24750b9ad5ef 107 if( csr == NULL || buf == NULL )
Christopher Haster 1:24750b9ad5ef 108 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 109
Christopher Haster 1:24750b9ad5ef 110 mbedtls_x509_csr_init( csr );
Christopher Haster 1:24750b9ad5ef 111
Christopher Haster 1:24750b9ad5ef 112 /*
Christopher Haster 1:24750b9ad5ef 113 * first copy the raw DER data
Christopher Haster 1:24750b9ad5ef 114 */
Christopher Haster 1:24750b9ad5ef 115 p = mbedtls_calloc( 1, len = buflen );
Christopher Haster 1:24750b9ad5ef 116
Christopher Haster 1:24750b9ad5ef 117 if( p == NULL )
Christopher Haster 1:24750b9ad5ef 118 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
Christopher Haster 1:24750b9ad5ef 119
Christopher Haster 1:24750b9ad5ef 120 memcpy( p, buf, buflen );
Christopher Haster 1:24750b9ad5ef 121
Christopher Haster 1:24750b9ad5ef 122 csr->raw.p = p;
Christopher Haster 1:24750b9ad5ef 123 csr->raw.len = len;
Christopher Haster 1:24750b9ad5ef 124 end = p + len;
Christopher Haster 1:24750b9ad5ef 125
Christopher Haster 1:24750b9ad5ef 126 /*
Christopher Haster 1:24750b9ad5ef 127 * CertificationRequest ::= SEQUENCE {
Christopher Haster 1:24750b9ad5ef 128 * certificationRequestInfo CertificationRequestInfo,
Christopher Haster 1:24750b9ad5ef 129 * signatureAlgorithm AlgorithmIdentifier,
Christopher Haster 1:24750b9ad5ef 130 * signature BIT STRING
Christopher Haster 1:24750b9ad5ef 131 * }
Christopher Haster 1:24750b9ad5ef 132 */
Christopher Haster 1:24750b9ad5ef 133 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
Christopher Haster 1:24750b9ad5ef 134 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 135 {
Christopher Haster 1:24750b9ad5ef 136 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 137 return( MBEDTLS_ERR_X509_INVALID_FORMAT );
Christopher Haster 1:24750b9ad5ef 138 }
Christopher Haster 1:24750b9ad5ef 139
Christopher Haster 1:24750b9ad5ef 140 if( len != (size_t) ( end - p ) )
Christopher Haster 1:24750b9ad5ef 141 {
Christopher Haster 1:24750b9ad5ef 142 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 143 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
Christopher Haster 1:24750b9ad5ef 144 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
Christopher Haster 1:24750b9ad5ef 145 }
Christopher Haster 1:24750b9ad5ef 146
Christopher Haster 1:24750b9ad5ef 147 /*
Christopher Haster 1:24750b9ad5ef 148 * CertificationRequestInfo ::= SEQUENCE {
Christopher Haster 1:24750b9ad5ef 149 */
Christopher Haster 1:24750b9ad5ef 150 csr->cri.p = p;
Christopher Haster 1:24750b9ad5ef 151
Christopher Haster 1:24750b9ad5ef 152 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
Christopher Haster 1:24750b9ad5ef 153 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 154 {
Christopher Haster 1:24750b9ad5ef 155 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 156 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
Christopher Haster 1:24750b9ad5ef 157 }
Christopher Haster 1:24750b9ad5ef 158
Christopher Haster 1:24750b9ad5ef 159 end = p + len;
Christopher Haster 1:24750b9ad5ef 160 csr->cri.len = end - csr->cri.p;
Christopher Haster 1:24750b9ad5ef 161
Christopher Haster 1:24750b9ad5ef 162 /*
Christopher Haster 1:24750b9ad5ef 163 * Version ::= INTEGER { v1(0) }
Christopher Haster 1:24750b9ad5ef 164 */
Christopher Haster 1:24750b9ad5ef 165 if( ( ret = x509_csr_get_version( &p, end, &csr->version ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 166 {
Christopher Haster 1:24750b9ad5ef 167 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 168 return( ret );
Christopher Haster 1:24750b9ad5ef 169 }
Christopher Haster 1:24750b9ad5ef 170
Christopher Haster 1:24750b9ad5ef 171 csr->version++;
Christopher Haster 1:24750b9ad5ef 172
Christopher Haster 1:24750b9ad5ef 173 if( csr->version != 1 )
Christopher Haster 1:24750b9ad5ef 174 {
Christopher Haster 1:24750b9ad5ef 175 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 176 return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
Christopher Haster 1:24750b9ad5ef 177 }
Christopher Haster 1:24750b9ad5ef 178
Christopher Haster 1:24750b9ad5ef 179 /*
Christopher Haster 1:24750b9ad5ef 180 * subject Name
Christopher Haster 1:24750b9ad5ef 181 */
Christopher Haster 1:24750b9ad5ef 182 csr->subject_raw.p = p;
Christopher Haster 1:24750b9ad5ef 183
Christopher Haster 1:24750b9ad5ef 184 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
Christopher Haster 1:24750b9ad5ef 185 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 186 {
Christopher Haster 1:24750b9ad5ef 187 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 188 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
Christopher Haster 1:24750b9ad5ef 189 }
Christopher Haster 1:24750b9ad5ef 190
Christopher Haster 1:24750b9ad5ef 191 if( ( ret = mbedtls_x509_get_name( &p, p + len, &csr->subject ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 192 {
Christopher Haster 1:24750b9ad5ef 193 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 194 return( ret );
Christopher Haster 1:24750b9ad5ef 195 }
Christopher Haster 1:24750b9ad5ef 196
Christopher Haster 1:24750b9ad5ef 197 csr->subject_raw.len = p - csr->subject_raw.p;
Christopher Haster 1:24750b9ad5ef 198
Christopher Haster 1:24750b9ad5ef 199 /*
Christopher Haster 1:24750b9ad5ef 200 * subjectPKInfo SubjectPublicKeyInfo
Christopher Haster 1:24750b9ad5ef 201 */
Christopher Haster 1:24750b9ad5ef 202 if( ( ret = mbedtls_pk_parse_subpubkey( &p, end, &csr->pk ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 203 {
Christopher Haster 1:24750b9ad5ef 204 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 205 return( ret );
Christopher Haster 1:24750b9ad5ef 206 }
Christopher Haster 1:24750b9ad5ef 207
Christopher Haster 1:24750b9ad5ef 208 /*
Christopher Haster 1:24750b9ad5ef 209 * attributes [0] Attributes
Christopher Haster 1:24750b9ad5ef 210 */
Christopher Haster 1:24750b9ad5ef 211 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
Christopher Haster 1:24750b9ad5ef 212 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 213 {
Christopher Haster 1:24750b9ad5ef 214 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 215 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
Christopher Haster 1:24750b9ad5ef 216 }
Christopher Haster 1:24750b9ad5ef 217 // TODO Parse Attributes / extension requests
Christopher Haster 1:24750b9ad5ef 218
Christopher Haster 1:24750b9ad5ef 219 p += len;
Christopher Haster 1:24750b9ad5ef 220
Christopher Haster 1:24750b9ad5ef 221 end = csr->raw.p + csr->raw.len;
Christopher Haster 1:24750b9ad5ef 222
Christopher Haster 1:24750b9ad5ef 223 /*
Christopher Haster 1:24750b9ad5ef 224 * signatureAlgorithm AlgorithmIdentifier,
Christopher Haster 1:24750b9ad5ef 225 * signature BIT STRING
Christopher Haster 1:24750b9ad5ef 226 */
Christopher Haster 1:24750b9ad5ef 227 if( ( ret = mbedtls_x509_get_alg( &p, end, &csr->sig_oid, &sig_params ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 228 {
Christopher Haster 1:24750b9ad5ef 229 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 230 return( ret );
Christopher Haster 1:24750b9ad5ef 231 }
Christopher Haster 1:24750b9ad5ef 232
Christopher Haster 1:24750b9ad5ef 233 if( ( ret = mbedtls_x509_get_sig_alg( &csr->sig_oid, &sig_params,
Christopher Haster 1:24750b9ad5ef 234 &csr->sig_md, &csr->sig_pk,
Christopher Haster 1:24750b9ad5ef 235 &csr->sig_opts ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 236 {
Christopher Haster 1:24750b9ad5ef 237 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 238 return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG );
Christopher Haster 1:24750b9ad5ef 239 }
Christopher Haster 1:24750b9ad5ef 240
Christopher Haster 1:24750b9ad5ef 241 if( ( ret = mbedtls_x509_get_sig( &p, end, &csr->sig ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 242 {
Christopher Haster 1:24750b9ad5ef 243 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 244 return( ret );
Christopher Haster 1:24750b9ad5ef 245 }
Christopher Haster 1:24750b9ad5ef 246
Christopher Haster 1:24750b9ad5ef 247 if( p != end )
Christopher Haster 1:24750b9ad5ef 248 {
Christopher Haster 1:24750b9ad5ef 249 mbedtls_x509_csr_free( csr );
Christopher Haster 1:24750b9ad5ef 250 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
Christopher Haster 1:24750b9ad5ef 251 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
Christopher Haster 1:24750b9ad5ef 252 }
Christopher Haster 1:24750b9ad5ef 253
Christopher Haster 1:24750b9ad5ef 254 return( 0 );
Christopher Haster 1:24750b9ad5ef 255 }
Christopher Haster 1:24750b9ad5ef 256
Christopher Haster 1:24750b9ad5ef 257 /*
Christopher Haster 1:24750b9ad5ef 258 * Parse a CSR, allowing for PEM or raw DER encoding
Christopher Haster 1:24750b9ad5ef 259 */
Christopher Haster 1:24750b9ad5ef 260 int mbedtls_x509_csr_parse( mbedtls_x509_csr *csr, const unsigned char *buf, size_t buflen )
Christopher Haster 1:24750b9ad5ef 261 {
Christopher Haster 1:24750b9ad5ef 262 int ret;
Christopher Haster 1:24750b9ad5ef 263 #if defined(MBEDTLS_PEM_PARSE_C)
Christopher Haster 1:24750b9ad5ef 264 size_t use_len;
Christopher Haster 1:24750b9ad5ef 265 mbedtls_pem_context pem;
Christopher Haster 1:24750b9ad5ef 266 #endif
Christopher Haster 1:24750b9ad5ef 267
Christopher Haster 1:24750b9ad5ef 268 /*
Christopher Haster 1:24750b9ad5ef 269 * Check for valid input
Christopher Haster 1:24750b9ad5ef 270 */
Christopher Haster 1:24750b9ad5ef 271 if( csr == NULL || buf == NULL )
Christopher Haster 1:24750b9ad5ef 272 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 273
Christopher Haster 1:24750b9ad5ef 274 #if defined(MBEDTLS_PEM_PARSE_C)
Christopher Haster 1:24750b9ad5ef 275 mbedtls_pem_init( &pem );
Christopher Haster 1:24750b9ad5ef 276
Christopher Haster 1:24750b9ad5ef 277 /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
Christopher Haster 1:24750b9ad5ef 278 if( buflen == 0 || buf[buflen - 1] != '\0' )
Christopher Haster 1:24750b9ad5ef 279 ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
Christopher Haster 1:24750b9ad5ef 280 else
Christopher Haster 1:24750b9ad5ef 281 ret = mbedtls_pem_read_buffer( &pem,
Christopher Haster 1:24750b9ad5ef 282 "-----BEGIN CERTIFICATE REQUEST-----",
Christopher Haster 1:24750b9ad5ef 283 "-----END CERTIFICATE REQUEST-----",
Christopher Haster 1:24750b9ad5ef 284 buf, NULL, 0, &use_len );
Christopher Haster 1:24750b9ad5ef 285
Christopher Haster 1:24750b9ad5ef 286 if( ret == 0 )
Christopher Haster 1:24750b9ad5ef 287 {
Christopher Haster 1:24750b9ad5ef 288 /*
Christopher Haster 1:24750b9ad5ef 289 * Was PEM encoded, parse the result
Christopher Haster 1:24750b9ad5ef 290 */
Christopher Haster 1:24750b9ad5ef 291 if( ( ret = mbedtls_x509_csr_parse_der( csr, pem.buf, pem.buflen ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 292 return( ret );
Christopher Haster 1:24750b9ad5ef 293
Christopher Haster 1:24750b9ad5ef 294 mbedtls_pem_free( &pem );
Christopher Haster 1:24750b9ad5ef 295 return( 0 );
Christopher Haster 1:24750b9ad5ef 296 }
Christopher Haster 1:24750b9ad5ef 297 else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
Christopher Haster 1:24750b9ad5ef 298 {
Christopher Haster 1:24750b9ad5ef 299 mbedtls_pem_free( &pem );
Christopher Haster 1:24750b9ad5ef 300 return( ret );
Christopher Haster 1:24750b9ad5ef 301 }
Christopher Haster 1:24750b9ad5ef 302 else
Christopher Haster 1:24750b9ad5ef 303 #endif /* MBEDTLS_PEM_PARSE_C */
Christopher Haster 1:24750b9ad5ef 304 return( mbedtls_x509_csr_parse_der( csr, buf, buflen ) );
Christopher Haster 1:24750b9ad5ef 305 }
Christopher Haster 1:24750b9ad5ef 306
Christopher Haster 1:24750b9ad5ef 307 #if defined(MBEDTLS_FS_IO)
Christopher Haster 1:24750b9ad5ef 308 /*
Christopher Haster 1:24750b9ad5ef 309 * Load a CSR into the structure
Christopher Haster 1:24750b9ad5ef 310 */
Christopher Haster 1:24750b9ad5ef 311 int mbedtls_x509_csr_parse_file( mbedtls_x509_csr *csr, const char *path )
Christopher Haster 1:24750b9ad5ef 312 {
Christopher Haster 1:24750b9ad5ef 313 int ret;
Christopher Haster 1:24750b9ad5ef 314 size_t n;
Christopher Haster 1:24750b9ad5ef 315 unsigned char *buf;
Christopher Haster 1:24750b9ad5ef 316
Christopher Haster 1:24750b9ad5ef 317 if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 318 return( ret );
Christopher Haster 1:24750b9ad5ef 319
Christopher Haster 1:24750b9ad5ef 320 ret = mbedtls_x509_csr_parse( csr, buf, n );
Christopher Haster 1:24750b9ad5ef 321
Christopher Haster 1:24750b9ad5ef 322 mbedtls_zeroize( buf, n );
Christopher Haster 1:24750b9ad5ef 323 mbedtls_free( buf );
Christopher Haster 1:24750b9ad5ef 324
Christopher Haster 1:24750b9ad5ef 325 return( ret );
Christopher Haster 1:24750b9ad5ef 326 }
Christopher Haster 1:24750b9ad5ef 327 #endif /* MBEDTLS_FS_IO */
Christopher Haster 1:24750b9ad5ef 328
Christopher Haster 1:24750b9ad5ef 329 #define BEFORE_COLON 14
Christopher Haster 1:24750b9ad5ef 330 #define BC "14"
Christopher Haster 1:24750b9ad5ef 331 /*
Christopher Haster 1:24750b9ad5ef 332 * Return an informational string about the CSR.
Christopher Haster 1:24750b9ad5ef 333 */
Christopher Haster 1:24750b9ad5ef 334 int mbedtls_x509_csr_info( char *buf, size_t size, const char *prefix,
Christopher Haster 1:24750b9ad5ef 335 const mbedtls_x509_csr *csr )
Christopher Haster 1:24750b9ad5ef 336 {
Christopher Haster 1:24750b9ad5ef 337 int ret;
Christopher Haster 1:24750b9ad5ef 338 size_t n;
Christopher Haster 1:24750b9ad5ef 339 char *p;
Christopher Haster 1:24750b9ad5ef 340 char key_size_str[BEFORE_COLON];
Christopher Haster 1:24750b9ad5ef 341
Christopher Haster 1:24750b9ad5ef 342 p = buf;
Christopher Haster 1:24750b9ad5ef 343 n = size;
Christopher Haster 1:24750b9ad5ef 344
Christopher Haster 1:24750b9ad5ef 345 ret = mbedtls_snprintf( p, n, "%sCSR version : %d",
Christopher Haster 1:24750b9ad5ef 346 prefix, csr->version );
Christopher Haster 1:24750b9ad5ef 347 MBEDTLS_X509_SAFE_SNPRINTF;
Christopher Haster 1:24750b9ad5ef 348
Christopher Haster 1:24750b9ad5ef 349 ret = mbedtls_snprintf( p, n, "\n%ssubject name : ", prefix );
Christopher Haster 1:24750b9ad5ef 350 MBEDTLS_X509_SAFE_SNPRINTF;
Christopher Haster 1:24750b9ad5ef 351 ret = mbedtls_x509_dn_gets( p, n, &csr->subject );
Christopher Haster 1:24750b9ad5ef 352 MBEDTLS_X509_SAFE_SNPRINTF;
Christopher Haster 1:24750b9ad5ef 353
Christopher Haster 1:24750b9ad5ef 354 ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix );
Christopher Haster 1:24750b9ad5ef 355 MBEDTLS_X509_SAFE_SNPRINTF;
Christopher Haster 1:24750b9ad5ef 356
Christopher Haster 1:24750b9ad5ef 357 ret = mbedtls_x509_sig_alg_gets( p, n, &csr->sig_oid, csr->sig_pk, csr->sig_md,
Christopher Haster 1:24750b9ad5ef 358 csr->sig_opts );
Christopher Haster 1:24750b9ad5ef 359 MBEDTLS_X509_SAFE_SNPRINTF;
Christopher Haster 1:24750b9ad5ef 360
Christopher Haster 1:24750b9ad5ef 361 if( ( ret = mbedtls_x509_key_size_helper( key_size_str, BEFORE_COLON,
Christopher Haster 1:24750b9ad5ef 362 mbedtls_pk_get_name( &csr->pk ) ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 363 {
Christopher Haster 1:24750b9ad5ef 364 return( ret );
Christopher Haster 1:24750b9ad5ef 365 }
Christopher Haster 1:24750b9ad5ef 366
Christopher Haster 1:24750b9ad5ef 367 ret = mbedtls_snprintf( p, n, "\n%s%-" BC "s: %d bits\n", prefix, key_size_str,
Christopher Haster 1:24750b9ad5ef 368 (int) mbedtls_pk_get_bitlen( &csr->pk ) );
Christopher Haster 1:24750b9ad5ef 369 MBEDTLS_X509_SAFE_SNPRINTF;
Christopher Haster 1:24750b9ad5ef 370
Christopher Haster 1:24750b9ad5ef 371 return( (int) ( size - n ) );
Christopher Haster 1:24750b9ad5ef 372 }
Christopher Haster 1:24750b9ad5ef 373
Christopher Haster 1:24750b9ad5ef 374 /*
Christopher Haster 1:24750b9ad5ef 375 * Initialize a CSR
Christopher Haster 1:24750b9ad5ef 376 */
Christopher Haster 1:24750b9ad5ef 377 void mbedtls_x509_csr_init( mbedtls_x509_csr *csr )
Christopher Haster 1:24750b9ad5ef 378 {
Christopher Haster 1:24750b9ad5ef 379 memset( csr, 0, sizeof(mbedtls_x509_csr) );
Christopher Haster 1:24750b9ad5ef 380 }
Christopher Haster 1:24750b9ad5ef 381
Christopher Haster 1:24750b9ad5ef 382 /*
Christopher Haster 1:24750b9ad5ef 383 * Unallocate all CSR data
Christopher Haster 1:24750b9ad5ef 384 */
Christopher Haster 1:24750b9ad5ef 385 void mbedtls_x509_csr_free( mbedtls_x509_csr *csr )
Christopher Haster 1:24750b9ad5ef 386 {
Christopher Haster 1:24750b9ad5ef 387 mbedtls_x509_name *name_cur;
Christopher Haster 1:24750b9ad5ef 388 mbedtls_x509_name *name_prv;
Christopher Haster 1:24750b9ad5ef 389
Christopher Haster 1:24750b9ad5ef 390 if( csr == NULL )
Christopher Haster 1:24750b9ad5ef 391 return;
Christopher Haster 1:24750b9ad5ef 392
Christopher Haster 1:24750b9ad5ef 393 mbedtls_pk_free( &csr->pk );
Christopher Haster 1:24750b9ad5ef 394
Christopher Haster 1:24750b9ad5ef 395 #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
Christopher Haster 1:24750b9ad5ef 396 mbedtls_free( csr->sig_opts );
Christopher Haster 1:24750b9ad5ef 397 #endif
Christopher Haster 1:24750b9ad5ef 398
Christopher Haster 1:24750b9ad5ef 399 name_cur = csr->subject.next;
Christopher Haster 1:24750b9ad5ef 400 while( name_cur != NULL )
Christopher Haster 1:24750b9ad5ef 401 {
Christopher Haster 1:24750b9ad5ef 402 name_prv = name_cur;
Christopher Haster 1:24750b9ad5ef 403 name_cur = name_cur->next;
Christopher Haster 1:24750b9ad5ef 404 mbedtls_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
Christopher Haster 1:24750b9ad5ef 405 mbedtls_free( name_prv );
Christopher Haster 1:24750b9ad5ef 406 }
Christopher Haster 1:24750b9ad5ef 407
Christopher Haster 1:24750b9ad5ef 408 if( csr->raw.p != NULL )
Christopher Haster 1:24750b9ad5ef 409 {
Christopher Haster 1:24750b9ad5ef 410 mbedtls_zeroize( csr->raw.p, csr->raw.len );
Christopher Haster 1:24750b9ad5ef 411 mbedtls_free( csr->raw.p );
Christopher Haster 1:24750b9ad5ef 412 }
Christopher Haster 1:24750b9ad5ef 413
Christopher Haster 1:24750b9ad5ef 414 mbedtls_zeroize( csr, sizeof( mbedtls_x509_csr ) );
Christopher Haster 1:24750b9ad5ef 415 }
Christopher Haster 1:24750b9ad5ef 416
Christopher Haster 1:24750b9ad5ef 417 #endif /* MBEDTLS_X509_CSR_PARSE_C */