Willie Solano / mbedtls-slave-prot-prod

mbed TLS Build

Dependents:   Slave-prot-prod

library/x509_csr.c@1:1a219dea6cb5, 2019-06-04 (annotated)

Committer:
williequesada
Date:
Tue Jun 04 16:03:38 2019 +0000
Revision:
1:1a219dea6cb5
Parent:
0:cdf462088d13 
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markrad 0:cdf462088d13 1 /*
markrad 0:cdf462088d13 2 * X.509 Certificate Signing Request (CSR) parsing
markrad 0:cdf462088d13 3 *
markrad 0:cdf462088d13 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
markrad 0:cdf462088d13 5 * SPDX-License-Identifier: Apache-2.0
markrad 0:cdf462088d13 6 *
markrad 0:cdf462088d13 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
markrad 0:cdf462088d13 8 * not use this file except in compliance with the License.
markrad 0:cdf462088d13 9 * You may obtain a copy of the License at
markrad 0:cdf462088d13 10 *
markrad 0:cdf462088d13 11 * http://www.apache.org/licenses/LICENSE-2.0
markrad 0:cdf462088d13 12 *
markrad 0:cdf462088d13 13 * Unless required by applicable law or agreed to in writing, software
markrad 0:cdf462088d13 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
markrad 0:cdf462088d13 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
markrad 0:cdf462088d13 16 * See the License for the specific language governing permissions and
markrad 0:cdf462088d13 17 * limitations under the License.
markrad 0:cdf462088d13 18 *
markrad 0:cdf462088d13 19 * This file is part of mbed TLS (https://tls.mbed.org)
markrad 0:cdf462088d13 20 */
markrad 0:cdf462088d13 21 /*
markrad 0:cdf462088d13 22 * The ITU-T X.509 standard defines a certificate format for PKI.
markrad 0:cdf462088d13 23 *
markrad 0:cdf462088d13 24 * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
markrad 0:cdf462088d13 25 * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
markrad 0:cdf462088d13 26 * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
markrad 0:cdf462088d13 27 *
markrad 0:cdf462088d13 28 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
markrad 0:cdf462088d13 29 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
markrad 0:cdf462088d13 30 */
markrad 0:cdf462088d13 31
markrad 0:cdf462088d13 32 #if !defined(MBEDTLS_CONFIG_FILE)
markrad 0:cdf462088d13 33 #include "mbedtls/config.h"
markrad 0:cdf462088d13 34 #else
markrad 0:cdf462088d13 35 #include MBEDTLS_CONFIG_FILE
markrad 0:cdf462088d13 36 #endif
markrad 0:cdf462088d13 37
markrad 0:cdf462088d13 38 #if defined(MBEDTLS_X509_CSR_PARSE_C)
markrad 0:cdf462088d13 39
markrad 0:cdf462088d13 40 #include "mbedtls/x509_csr.h"
markrad 0:cdf462088d13 41 #include "mbedtls/oid.h"
markrad 0:cdf462088d13 42
markrad 0:cdf462088d13 43 #include <string.h>
markrad 0:cdf462088d13 44
markrad 0:cdf462088d13 45 #if defined(MBEDTLS_PEM_PARSE_C)
markrad 0:cdf462088d13 46 #include "mbedtls/pem.h"
markrad 0:cdf462088d13 47 #endif
markrad 0:cdf462088d13 48
markrad 0:cdf462088d13 49 #if defined(MBEDTLS_PLATFORM_C)
markrad 0:cdf462088d13 50 #include "mbedtls/platform.h"
markrad 0:cdf462088d13 51 #else
markrad 0:cdf462088d13 52 #include <stdlib.h>
markrad 0:cdf462088d13 53 #include <stdio.h>
markrad 0:cdf462088d13 54 #define mbedtls_free free
markrad 0:cdf462088d13 55 #define mbedtls_calloc calloc
markrad 0:cdf462088d13 56 #define mbedtls_snprintf snprintf
markrad 0:cdf462088d13 57 #endif
markrad 0:cdf462088d13 58
markrad 0:cdf462088d13 59 #if defined(MBEDTLS_FS_IO) || defined(EFIX64) || defined(EFI32)
markrad 0:cdf462088d13 60 #include <stdio.h>
markrad 0:cdf462088d13 61 #endif
markrad 0:cdf462088d13 62
markrad 0:cdf462088d13 63 /* Implementation that should never be optimized out by the compiler */
markrad 0:cdf462088d13 64 static void mbedtls_zeroize( void *v, size_t n ) {
markrad 0:cdf462088d13 65 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
markrad 0:cdf462088d13 66 }
markrad 0:cdf462088d13 67
markrad 0:cdf462088d13 68 /*
markrad 0:cdf462088d13 69 * Version ::= INTEGER { v1(0) }
markrad 0:cdf462088d13 70 */
markrad 0:cdf462088d13 71 static int x509_csr_get_version( unsigned char **p,
markrad 0:cdf462088d13 72 const unsigned char *end,
markrad 0:cdf462088d13 73 int *ver )
markrad 0:cdf462088d13 74 {
markrad 0:cdf462088d13 75 int ret;
markrad 0:cdf462088d13 76
markrad 0:cdf462088d13 77 if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
markrad 0:cdf462088d13 78 {
markrad 0:cdf462088d13 79 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
markrad 0:cdf462088d13 80 {
markrad 0:cdf462088d13 81 *ver = 0;
markrad 0:cdf462088d13 82 return( 0 );
markrad 0:cdf462088d13 83 }
markrad 0:cdf462088d13 84
markrad 0:cdf462088d13 85 return( MBEDTLS_ERR_X509_INVALID_VERSION + ret );
markrad 0:cdf462088d13 86 }
markrad 0:cdf462088d13 87
markrad 0:cdf462088d13 88 return( 0 );
markrad 0:cdf462088d13 89 }
markrad 0:cdf462088d13 90
markrad 0:cdf462088d13 91 /*
markrad 0:cdf462088d13 92 * Parse a CSR in DER format
markrad 0:cdf462088d13 93 */
markrad 0:cdf462088d13 94 int mbedtls_x509_csr_parse_der( mbedtls_x509_csr *csr,
markrad 0:cdf462088d13 95 const unsigned char *buf, size_t buflen )
markrad 0:cdf462088d13 96 {
markrad 0:cdf462088d13 97 int ret;
markrad 0:cdf462088d13 98 size_t len;
markrad 0:cdf462088d13 99 unsigned char *p, *end;
markrad 0:cdf462088d13 100 mbedtls_x509_buf sig_params;
markrad 0:cdf462088d13 101
markrad 0:cdf462088d13 102 memset( &sig_params, 0, sizeof( mbedtls_x509_buf ) );
markrad 0:cdf462088d13 103
markrad 0:cdf462088d13 104 /*
markrad 0:cdf462088d13 105 * Check for valid input
markrad 0:cdf462088d13 106 */
markrad 0:cdf462088d13 107 if( csr == NULL || buf == NULL || buflen == 0 )
markrad 0:cdf462088d13 108 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
markrad 0:cdf462088d13 109
markrad 0:cdf462088d13 110 mbedtls_x509_csr_init( csr );
markrad 0:cdf462088d13 111
markrad 0:cdf462088d13 112 /*
markrad 0:cdf462088d13 113 * first copy the raw DER data
markrad 0:cdf462088d13 114 */
markrad 0:cdf462088d13 115 p = mbedtls_calloc( 1, len = buflen );
markrad 0:cdf462088d13 116
markrad 0:cdf462088d13 117 if( p == NULL )
markrad 0:cdf462088d13 118 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
markrad 0:cdf462088d13 119
markrad 0:cdf462088d13 120 memcpy( p, buf, buflen );
markrad 0:cdf462088d13 121
markrad 0:cdf462088d13 122 csr->raw.p = p;
markrad 0:cdf462088d13 123 csr->raw.len = len;
markrad 0:cdf462088d13 124 end = p + len;
markrad 0:cdf462088d13 125
markrad 0:cdf462088d13 126 /*
markrad 0:cdf462088d13 127 * CertificationRequest ::= SEQUENCE {
markrad 0:cdf462088d13 128 * certificationRequestInfo CertificationRequestInfo,
markrad 0:cdf462088d13 129 * signatureAlgorithm AlgorithmIdentifier,
markrad 0:cdf462088d13 130 * signature BIT STRING
markrad 0:cdf462088d13 131 * }
markrad 0:cdf462088d13 132 */
markrad 0:cdf462088d13 133 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
markrad 0:cdf462088d13 134 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
markrad 0:cdf462088d13 135 {
markrad 0:cdf462088d13 136 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 137 return( MBEDTLS_ERR_X509_INVALID_FORMAT );
markrad 0:cdf462088d13 138 }
markrad 0:cdf462088d13 139
markrad 0:cdf462088d13 140 if( len != (size_t) ( end - p ) )
markrad 0:cdf462088d13 141 {
markrad 0:cdf462088d13 142 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 143 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
markrad 0:cdf462088d13 144 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
markrad 0:cdf462088d13 145 }
markrad 0:cdf462088d13 146
markrad 0:cdf462088d13 147 /*
markrad 0:cdf462088d13 148 * CertificationRequestInfo ::= SEQUENCE {
markrad 0:cdf462088d13 149 */
markrad 0:cdf462088d13 150 csr->cri.p = p;
markrad 0:cdf462088d13 151
markrad 0:cdf462088d13 152 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
markrad 0:cdf462088d13 153 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
markrad 0:cdf462088d13 154 {
markrad 0:cdf462088d13 155 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 156 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
markrad 0:cdf462088d13 157 }
markrad 0:cdf462088d13 158
markrad 0:cdf462088d13 159 end = p + len;
markrad 0:cdf462088d13 160 csr->cri.len = end - csr->cri.p;
markrad 0:cdf462088d13 161
markrad 0:cdf462088d13 162 /*
markrad 0:cdf462088d13 163 * Version ::= INTEGER { v1(0) }
markrad 0:cdf462088d13 164 */
markrad 0:cdf462088d13 165 if( ( ret = x509_csr_get_version( &p, end, &csr->version ) ) != 0 )
markrad 0:cdf462088d13 166 {
markrad 0:cdf462088d13 167 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 168 return( ret );
markrad 0:cdf462088d13 169 }
markrad 0:cdf462088d13 170
markrad 0:cdf462088d13 171 csr->version++;
markrad 0:cdf462088d13 172
markrad 0:cdf462088d13 173 if( csr->version != 1 )
markrad 0:cdf462088d13 174 {
markrad 0:cdf462088d13 175 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 176 return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
markrad 0:cdf462088d13 177 }
markrad 0:cdf462088d13 178
markrad 0:cdf462088d13 179 /*
markrad 0:cdf462088d13 180 * subject Name
markrad 0:cdf462088d13 181 */
markrad 0:cdf462088d13 182 csr->subject_raw.p = p;
markrad 0:cdf462088d13 183
markrad 0:cdf462088d13 184 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
markrad 0:cdf462088d13 185 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
markrad 0:cdf462088d13 186 {
markrad 0:cdf462088d13 187 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 188 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
markrad 0:cdf462088d13 189 }
markrad 0:cdf462088d13 190
markrad 0:cdf462088d13 191 if( ( ret = mbedtls_x509_get_name( &p, p + len, &csr->subject ) ) != 0 )
markrad 0:cdf462088d13 192 {
markrad 0:cdf462088d13 193 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 194 return( ret );
markrad 0:cdf462088d13 195 }
markrad 0:cdf462088d13 196
markrad 0:cdf462088d13 197 csr->subject_raw.len = p - csr->subject_raw.p;
markrad 0:cdf462088d13 198
markrad 0:cdf462088d13 199 /*
markrad 0:cdf462088d13 200 * subjectPKInfo SubjectPublicKeyInfo
markrad 0:cdf462088d13 201 */
markrad 0:cdf462088d13 202 if( ( ret = mbedtls_pk_parse_subpubkey( &p, end, &csr->pk ) ) != 0 )
markrad 0:cdf462088d13 203 {
markrad 0:cdf462088d13 204 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 205 return( ret );
markrad 0:cdf462088d13 206 }
markrad 0:cdf462088d13 207
markrad 0:cdf462088d13 208 /*
markrad 0:cdf462088d13 209 * attributes [0] Attributes
markrad 0:cdf462088d13 210 *
markrad 0:cdf462088d13 211 * The list of possible attributes is open-ended, though RFC 2985
markrad 0:cdf462088d13 212 * (PKCS#9) defines a few in section 5.4. We currently don't support any,
markrad 0:cdf462088d13 213 * so we just ignore them. This is a safe thing to do as the worst thing
markrad 0:cdf462088d13 214 * that could happen is that we issue a certificate that does not match
markrad 0:cdf462088d13 215 * the requester's expectations - this cannot cause a violation of our
markrad 0:cdf462088d13 216 * signature policies.
markrad 0:cdf462088d13 217 */
markrad 0:cdf462088d13 218 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
markrad 0:cdf462088d13 219 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC ) ) != 0 )
markrad 0:cdf462088d13 220 {
markrad 0:cdf462088d13 221 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 222 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
markrad 0:cdf462088d13 223 }
markrad 0:cdf462088d13 224
markrad 0:cdf462088d13 225 p += len;
markrad 0:cdf462088d13 226
markrad 0:cdf462088d13 227 end = csr->raw.p + csr->raw.len;
markrad 0:cdf462088d13 228
markrad 0:cdf462088d13 229 /*
markrad 0:cdf462088d13 230 * signatureAlgorithm AlgorithmIdentifier,
markrad 0:cdf462088d13 231 * signature BIT STRING
markrad 0:cdf462088d13 232 */
markrad 0:cdf462088d13 233 if( ( ret = mbedtls_x509_get_alg( &p, end, &csr->sig_oid, &sig_params ) ) != 0 )
markrad 0:cdf462088d13 234 {
markrad 0:cdf462088d13 235 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 236 return( ret );
markrad 0:cdf462088d13 237 }
markrad 0:cdf462088d13 238
markrad 0:cdf462088d13 239 if( ( ret = mbedtls_x509_get_sig_alg( &csr->sig_oid, &sig_params,
markrad 0:cdf462088d13 240 &csr->sig_md, &csr->sig_pk,
markrad 0:cdf462088d13 241 &csr->sig_opts ) ) != 0 )
markrad 0:cdf462088d13 242 {
markrad 0:cdf462088d13 243 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 244 return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG );
markrad 0:cdf462088d13 245 }
markrad 0:cdf462088d13 246
markrad 0:cdf462088d13 247 if( ( ret = mbedtls_x509_get_sig( &p, end, &csr->sig ) ) != 0 )
markrad 0:cdf462088d13 248 {
markrad 0:cdf462088d13 249 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 250 return( ret );
markrad 0:cdf462088d13 251 }
markrad 0:cdf462088d13 252
markrad 0:cdf462088d13 253 if( p != end )
markrad 0:cdf462088d13 254 {
markrad 0:cdf462088d13 255 mbedtls_x509_csr_free( csr );
markrad 0:cdf462088d13 256 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
markrad 0:cdf462088d13 257 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
markrad 0:cdf462088d13 258 }
markrad 0:cdf462088d13 259
markrad 0:cdf462088d13 260 return( 0 );
markrad 0:cdf462088d13 261 }
markrad 0:cdf462088d13 262
markrad 0:cdf462088d13 263 /*
markrad 0:cdf462088d13 264 * Parse a CSR, allowing for PEM or raw DER encoding
markrad 0:cdf462088d13 265 */
markrad 0:cdf462088d13 266 int mbedtls_x509_csr_parse( mbedtls_x509_csr *csr, const unsigned char *buf, size_t buflen )
markrad 0:cdf462088d13 267 {
markrad 0:cdf462088d13 268 int ret;
markrad 0:cdf462088d13 269 #if defined(MBEDTLS_PEM_PARSE_C)
markrad 0:cdf462088d13 270 size_t use_len;
markrad 0:cdf462088d13 271 mbedtls_pem_context pem;
markrad 0:cdf462088d13 272 #endif
markrad 0:cdf462088d13 273
markrad 0:cdf462088d13 274 /*
markrad 0:cdf462088d13 275 * Check for valid input
markrad 0:cdf462088d13 276 */
markrad 0:cdf462088d13 277 if( csr == NULL || buf == NULL || buflen == 0 )
markrad 0:cdf462088d13 278 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
markrad 0:cdf462088d13 279
markrad 0:cdf462088d13 280 #if defined(MBEDTLS_PEM_PARSE_C)
markrad 0:cdf462088d13 281 mbedtls_pem_init( &pem );
markrad 0:cdf462088d13 282
markrad 0:cdf462088d13 283 /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
markrad 0:cdf462088d13 284 if( buf[buflen - 1] != '\0' )
markrad 0:cdf462088d13 285 ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
markrad 0:cdf462088d13 286 else
markrad 0:cdf462088d13 287 ret = mbedtls_pem_read_buffer( &pem,
markrad 0:cdf462088d13 288 "-----BEGIN CERTIFICATE REQUEST-----",
markrad 0:cdf462088d13 289 "-----END CERTIFICATE REQUEST-----",
markrad 0:cdf462088d13 290 buf, NULL, 0, &use_len );
markrad 0:cdf462088d13 291
markrad 0:cdf462088d13 292 if( ret == 0 )
markrad 0:cdf462088d13 293 {
markrad 0:cdf462088d13 294 /*
markrad 0:cdf462088d13 295 * Was PEM encoded, parse the result
markrad 0:cdf462088d13 296 */
markrad 0:cdf462088d13 297 if( ( ret = mbedtls_x509_csr_parse_der( csr, pem.buf, pem.buflen ) ) != 0 )
markrad 0:cdf462088d13 298 return( ret );
markrad 0:cdf462088d13 299
markrad 0:cdf462088d13 300 mbedtls_pem_free( &pem );
markrad 0:cdf462088d13 301 return( 0 );
markrad 0:cdf462088d13 302 }
markrad 0:cdf462088d13 303 else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
markrad 0:cdf462088d13 304 {
markrad 0:cdf462088d13 305 mbedtls_pem_free( &pem );
markrad 0:cdf462088d13 306 return( ret );
markrad 0:cdf462088d13 307 }
markrad 0:cdf462088d13 308 else
markrad 0:cdf462088d13 309 #endif /* MBEDTLS_PEM_PARSE_C */
markrad 0:cdf462088d13 310 return( mbedtls_x509_csr_parse_der( csr, buf, buflen ) );
markrad 0:cdf462088d13 311 }
markrad 0:cdf462088d13 312
markrad 0:cdf462088d13 313 #if defined(MBEDTLS_FS_IO)
markrad 0:cdf462088d13 314 /*
markrad 0:cdf462088d13 315 * Load a CSR into the structure
markrad 0:cdf462088d13 316 */
markrad 0:cdf462088d13 317 int mbedtls_x509_csr_parse_file( mbedtls_x509_csr *csr, const char *path )
markrad 0:cdf462088d13 318 {
markrad 0:cdf462088d13 319 int ret;
markrad 0:cdf462088d13 320 size_t n;
markrad 0:cdf462088d13 321 unsigned char *buf;
markrad 0:cdf462088d13 322
markrad 0:cdf462088d13 323 if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
markrad 0:cdf462088d13 324 return( ret );
markrad 0:cdf462088d13 325
markrad 0:cdf462088d13 326 ret = mbedtls_x509_csr_parse( csr, buf, n );
markrad 0:cdf462088d13 327
markrad 0:cdf462088d13 328 mbedtls_zeroize( buf, n );
markrad 0:cdf462088d13 329 mbedtls_free( buf );
markrad 0:cdf462088d13 330
markrad 0:cdf462088d13 331 return( ret );
markrad 0:cdf462088d13 332 }
markrad 0:cdf462088d13 333 #endif /* MBEDTLS_FS_IO */
markrad 0:cdf462088d13 334
markrad 0:cdf462088d13 335 #define BEFORE_COLON 14
markrad 0:cdf462088d13 336 #define BC "14"
markrad 0:cdf462088d13 337 /*
markrad 0:cdf462088d13 338 * Return an informational string about the CSR.
markrad 0:cdf462088d13 339 */
markrad 0:cdf462088d13 340 int mbedtls_x509_csr_info( char *buf, size_t size, const char *prefix,
markrad 0:cdf462088d13 341 const mbedtls_x509_csr *csr )
markrad 0:cdf462088d13 342 {
markrad 0:cdf462088d13 343 int ret;
markrad 0:cdf462088d13 344 size_t n;
markrad 0:cdf462088d13 345 char *p;
markrad 0:cdf462088d13 346 char key_size_str[BEFORE_COLON];
markrad 0:cdf462088d13 347
markrad 0:cdf462088d13 348 p = buf;
markrad 0:cdf462088d13 349 n = size;
markrad 0:cdf462088d13 350
markrad 0:cdf462088d13 351 ret = mbedtls_snprintf( p, n, "%sCSR version : %d",
markrad 0:cdf462088d13 352 prefix, csr->version );
markrad 0:cdf462088d13 353 MBEDTLS_X509_SAFE_SNPRINTF;
markrad 0:cdf462088d13 354
markrad 0:cdf462088d13 355 ret = mbedtls_snprintf( p, n, "\n%ssubject name : ", prefix );
markrad 0:cdf462088d13 356 MBEDTLS_X509_SAFE_SNPRINTF;
markrad 0:cdf462088d13 357 ret = mbedtls_x509_dn_gets( p, n, &csr->subject );
markrad 0:cdf462088d13 358 MBEDTLS_X509_SAFE_SNPRINTF;
markrad 0:cdf462088d13 359
markrad 0:cdf462088d13 360 ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix );
markrad 0:cdf462088d13 361 MBEDTLS_X509_SAFE_SNPRINTF;
markrad 0:cdf462088d13 362
markrad 0:cdf462088d13 363 ret = mbedtls_x509_sig_alg_gets( p, n, &csr->sig_oid, csr->sig_pk, csr->sig_md,
markrad 0:cdf462088d13 364 csr->sig_opts );
markrad 0:cdf462088d13 365 MBEDTLS_X509_SAFE_SNPRINTF;
markrad 0:cdf462088d13 366
markrad 0:cdf462088d13 367 if( ( ret = mbedtls_x509_key_size_helper( key_size_str, BEFORE_COLON,
markrad 0:cdf462088d13 368 mbedtls_pk_get_name( &csr->pk ) ) ) != 0 )
markrad 0:cdf462088d13 369 {
markrad 0:cdf462088d13 370 return( ret );
markrad 0:cdf462088d13 371 }
markrad 0:cdf462088d13 372
markrad 0:cdf462088d13 373 ret = mbedtls_snprintf( p, n, "\n%s%-" BC "s: %d bits\n", prefix, key_size_str,
markrad 0:cdf462088d13 374 (int) mbedtls_pk_get_bitlen( &csr->pk ) );
markrad 0:cdf462088d13 375 MBEDTLS_X509_SAFE_SNPRINTF;
markrad 0:cdf462088d13 376
markrad 0:cdf462088d13 377 return( (int) ( size - n ) );
markrad 0:cdf462088d13 378 }
markrad 0:cdf462088d13 379
markrad 0:cdf462088d13 380 /*
markrad 0:cdf462088d13 381 * Initialize a CSR
markrad 0:cdf462088d13 382 */
markrad 0:cdf462088d13 383 void mbedtls_x509_csr_init( mbedtls_x509_csr *csr )
markrad 0:cdf462088d13 384 {
markrad 0:cdf462088d13 385 memset( csr, 0, sizeof(mbedtls_x509_csr) );
markrad 0:cdf462088d13 386 }
markrad 0:cdf462088d13 387
markrad 0:cdf462088d13 388 /*
markrad 0:cdf462088d13 389 * Unallocate all CSR data
markrad 0:cdf462088d13 390 */
markrad 0:cdf462088d13 391 void mbedtls_x509_csr_free( mbedtls_x509_csr *csr )
markrad 0:cdf462088d13 392 {
markrad 0:cdf462088d13 393 mbedtls_x509_name *name_cur;
markrad 0:cdf462088d13 394 mbedtls_x509_name *name_prv;
markrad 0:cdf462088d13 395
markrad 0:cdf462088d13 396 if( csr == NULL )
markrad 0:cdf462088d13 397 return;
markrad 0:cdf462088d13 398
markrad 0:cdf462088d13 399 mbedtls_pk_free( &csr->pk );
markrad 0:cdf462088d13 400
markrad 0:cdf462088d13 401 #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
markrad 0:cdf462088d13 402 mbedtls_free( csr->sig_opts );
markrad 0:cdf462088d13 403 #endif
markrad 0:cdf462088d13 404
markrad 0:cdf462088d13 405 name_cur = csr->subject.next;
markrad 0:cdf462088d13 406 while( name_cur != NULL )
markrad 0:cdf462088d13 407 {
markrad 0:cdf462088d13 408 name_prv = name_cur;
markrad 0:cdf462088d13 409 name_cur = name_cur->next;
markrad 0:cdf462088d13 410 mbedtls_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
markrad 0:cdf462088d13 411 mbedtls_free( name_prv );
markrad 0:cdf462088d13 412 }
markrad 0:cdf462088d13 413
markrad 0:cdf462088d13 414 if( csr->raw.p != NULL )
markrad 0:cdf462088d13 415 {
markrad 0:cdf462088d13 416 mbedtls_zeroize( csr->raw.p, csr->raw.len );
markrad 0:cdf462088d13 417 mbedtls_free( csr->raw.p );
markrad 0:cdf462088d13 418 }
markrad 0:cdf462088d13 419
markrad 0:cdf462088d13 420 mbedtls_zeroize( csr, sizeof( mbedtls_x509_csr ) );
markrad 0:cdf462088d13 421 }
markrad 0:cdf462088d13 422
markrad 0:cdf462088d13 423 #endif /* MBEDTLS_X509_CSR_PARSE_C */