Kev Mann / mbed-dev-OS5_10_4

features/mbedtls/src/x509_csr.c@2:7aab896b1a3b, 2019-03-13 (annotated)

Committer:
kevman
Date:
Wed Mar 13 11:03:24 2019 +0000
Revision:
2:7aab896b1a3b
Parent:
0:38ceb79fef03 
2019-03-13

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevman 0:38ceb79fef03 1 /*
kevman 0:38ceb79fef03 2 * X.509 Certificate Signing Request (CSR) parsing
kevman 0:38ceb79fef03 3 *
kevman 0:38ceb79fef03 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
kevman 0:38ceb79fef03 5 * SPDX-License-Identifier: Apache-2.0
kevman 0:38ceb79fef03 6 *
kevman 0:38ceb79fef03 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
kevman 0:38ceb79fef03 8 * not use this file except in compliance with the License.
kevman 0:38ceb79fef03 9 * You may obtain a copy of the License at
kevman 0:38ceb79fef03 10 *
kevman 0:38ceb79fef03 11 * http://www.apache.org/licenses/LICENSE-2.0
kevman 0:38ceb79fef03 12 *
kevman 0:38ceb79fef03 13 * Unless required by applicable law or agreed to in writing, software
kevman 0:38ceb79fef03 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
kevman 0:38ceb79fef03 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kevman 0:38ceb79fef03 16 * See the License for the specific language governing permissions and
kevman 0:38ceb79fef03 17 * limitations under the License.
kevman 0:38ceb79fef03 18 *
kevman 0:38ceb79fef03 19 * This file is part of mbed TLS (https://tls.mbed.org)
kevman 0:38ceb79fef03 20 */
kevman 0:38ceb79fef03 21 /*
kevman 0:38ceb79fef03 22 * The ITU-T X.509 standard defines a certificate format for PKI.
kevman 0:38ceb79fef03 23 *
kevman 0:38ceb79fef03 24 * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
kevman 0:38ceb79fef03 25 * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
kevman 0:38ceb79fef03 26 * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
kevman 0:38ceb79fef03 27 *
kevman 0:38ceb79fef03 28 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
kevman 0:38ceb79fef03 29 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
kevman 0:38ceb79fef03 30 */
kevman 0:38ceb79fef03 31
kevman 0:38ceb79fef03 32 #if !defined(MBEDTLS_CONFIG_FILE)
kevman 0:38ceb79fef03 33 #include "mbedtls/config.h"
kevman 0:38ceb79fef03 34 #else
kevman 0:38ceb79fef03 35 #include MBEDTLS_CONFIG_FILE
kevman 0:38ceb79fef03 36 #endif
kevman 0:38ceb79fef03 37
kevman 0:38ceb79fef03 38 #if defined(MBEDTLS_X509_CSR_PARSE_C)
kevman 0:38ceb79fef03 39
kevman 0:38ceb79fef03 40 #include "mbedtls/x509_csr.h"
kevman 0:38ceb79fef03 41 #include "mbedtls/oid.h"
kevman 0:38ceb79fef03 42 #include "mbedtls/platform_util.h"
kevman 0:38ceb79fef03 43
kevman 0:38ceb79fef03 44 #include <string.h>
kevman 0:38ceb79fef03 45
kevman 0:38ceb79fef03 46 #if defined(MBEDTLS_PEM_PARSE_C)
kevman 0:38ceb79fef03 47 #include "mbedtls/pem.h"
kevman 0:38ceb79fef03 48 #endif
kevman 0:38ceb79fef03 49
kevman 0:38ceb79fef03 50 #if defined(MBEDTLS_PLATFORM_C)
kevman 0:38ceb79fef03 51 #include "mbedtls/platform.h"
kevman 0:38ceb79fef03 52 #else
kevman 0:38ceb79fef03 53 #include <stdlib.h>
kevman 0:38ceb79fef03 54 #include <stdio.h>
kevman 0:38ceb79fef03 55 #define mbedtls_free free
kevman 0:38ceb79fef03 56 #define mbedtls_calloc calloc
kevman 0:38ceb79fef03 57 #define mbedtls_snprintf snprintf
kevman 0:38ceb79fef03 58 #endif
kevman 0:38ceb79fef03 59
kevman 0:38ceb79fef03 60 #if defined(MBEDTLS_FS_IO) || defined(EFIX64) || defined(EFI32)
kevman 0:38ceb79fef03 61 #include <stdio.h>
kevman 0:38ceb79fef03 62 #endif
kevman 0:38ceb79fef03 63
kevman 0:38ceb79fef03 64 /*
kevman 0:38ceb79fef03 65 * Version ::= INTEGER { v1(0) }
kevman 0:38ceb79fef03 66 */
kevman 0:38ceb79fef03 67 static int x509_csr_get_version( unsigned char **p,
kevman 0:38ceb79fef03 68 const unsigned char *end,
kevman 0:38ceb79fef03 69 int *ver )
kevman 0:38ceb79fef03 70 {
kevman 0:38ceb79fef03 71 int ret;
kevman 0:38ceb79fef03 72
kevman 0:38ceb79fef03 73 if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
kevman 0:38ceb79fef03 74 {
kevman 0:38ceb79fef03 75 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
kevman 0:38ceb79fef03 76 {
kevman 0:38ceb79fef03 77 *ver = 0;
kevman 0:38ceb79fef03 78 return( 0 );
kevman 0:38ceb79fef03 79 }
kevman 0:38ceb79fef03 80
kevman 0:38ceb79fef03 81 return( MBEDTLS_ERR_X509_INVALID_VERSION + ret );
kevman 0:38ceb79fef03 82 }
kevman 0:38ceb79fef03 83
kevman 0:38ceb79fef03 84 return( 0 );
kevman 0:38ceb79fef03 85 }
kevman 0:38ceb79fef03 86
kevman 0:38ceb79fef03 87 /*
kevman 0:38ceb79fef03 88 * Parse a CSR in DER format
kevman 0:38ceb79fef03 89 */
kevman 0:38ceb79fef03 90 int mbedtls_x509_csr_parse_der( mbedtls_x509_csr *csr,
kevman 0:38ceb79fef03 91 const unsigned char *buf, size_t buflen )
kevman 0:38ceb79fef03 92 {
kevman 0:38ceb79fef03 93 int ret;
kevman 0:38ceb79fef03 94 size_t len;
kevman 0:38ceb79fef03 95 unsigned char *p, *end;
kevman 0:38ceb79fef03 96 mbedtls_x509_buf sig_params;
kevman 0:38ceb79fef03 97
kevman 0:38ceb79fef03 98 memset( &sig_params, 0, sizeof( mbedtls_x509_buf ) );
kevman 0:38ceb79fef03 99
kevman 0:38ceb79fef03 100 /*
kevman 0:38ceb79fef03 101 * Check for valid input
kevman 0:38ceb79fef03 102 */
kevman 0:38ceb79fef03 103 if( csr == NULL || buf == NULL || buflen == 0 )
kevman 0:38ceb79fef03 104 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 105
kevman 0:38ceb79fef03 106 mbedtls_x509_csr_init( csr );
kevman 0:38ceb79fef03 107
kevman 0:38ceb79fef03 108 /*
kevman 0:38ceb79fef03 109 * first copy the raw DER data
kevman 0:38ceb79fef03 110 */
kevman 0:38ceb79fef03 111 p = mbedtls_calloc( 1, len = buflen );
kevman 0:38ceb79fef03 112
kevman 0:38ceb79fef03 113 if( p == NULL )
kevman 0:38ceb79fef03 114 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
kevman 0:38ceb79fef03 115
kevman 0:38ceb79fef03 116 memcpy( p, buf, buflen );
kevman 0:38ceb79fef03 117
kevman 0:38ceb79fef03 118 csr->raw.p = p;
kevman 0:38ceb79fef03 119 csr->raw.len = len;
kevman 0:38ceb79fef03 120 end = p + len;
kevman 0:38ceb79fef03 121
kevman 0:38ceb79fef03 122 /*
kevman 0:38ceb79fef03 123 * CertificationRequest ::= SEQUENCE {
kevman 0:38ceb79fef03 124 * certificationRequestInfo CertificationRequestInfo,
kevman 0:38ceb79fef03 125 * signatureAlgorithm AlgorithmIdentifier,
kevman 0:38ceb79fef03 126 * signature BIT STRING
kevman 0:38ceb79fef03 127 * }
kevman 0:38ceb79fef03 128 */
kevman 0:38ceb79fef03 129 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
kevman 0:38ceb79fef03 130 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
kevman 0:38ceb79fef03 131 {
kevman 0:38ceb79fef03 132 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 133 return( MBEDTLS_ERR_X509_INVALID_FORMAT );
kevman 0:38ceb79fef03 134 }
kevman 0:38ceb79fef03 135
kevman 0:38ceb79fef03 136 if( len != (size_t) ( end - p ) )
kevman 0:38ceb79fef03 137 {
kevman 0:38ceb79fef03 138 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 139 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
kevman 0:38ceb79fef03 140 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
kevman 0:38ceb79fef03 141 }
kevman 0:38ceb79fef03 142
kevman 0:38ceb79fef03 143 /*
kevman 0:38ceb79fef03 144 * CertificationRequestInfo ::= SEQUENCE {
kevman 0:38ceb79fef03 145 */
kevman 0:38ceb79fef03 146 csr->cri.p = p;
kevman 0:38ceb79fef03 147
kevman 0:38ceb79fef03 148 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
kevman 0:38ceb79fef03 149 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
kevman 0:38ceb79fef03 150 {
kevman 0:38ceb79fef03 151 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 152 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
kevman 0:38ceb79fef03 153 }
kevman 0:38ceb79fef03 154
kevman 0:38ceb79fef03 155 end = p + len;
kevman 0:38ceb79fef03 156 csr->cri.len = end - csr->cri.p;
kevman 0:38ceb79fef03 157
kevman 0:38ceb79fef03 158 /*
kevman 0:38ceb79fef03 159 * Version ::= INTEGER { v1(0) }
kevman 0:38ceb79fef03 160 */
kevman 0:38ceb79fef03 161 if( ( ret = x509_csr_get_version( &p, end, &csr->version ) ) != 0 )
kevman 0:38ceb79fef03 162 {
kevman 0:38ceb79fef03 163 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 164 return( ret );
kevman 0:38ceb79fef03 165 }
kevman 0:38ceb79fef03 166
kevman 0:38ceb79fef03 167 if( csr->version != 0 )
kevman 0:38ceb79fef03 168 {
kevman 0:38ceb79fef03 169 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 170 return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
kevman 0:38ceb79fef03 171 }
kevman 0:38ceb79fef03 172
kevman 0:38ceb79fef03 173 csr->version++;
kevman 0:38ceb79fef03 174
kevman 0:38ceb79fef03 175 /*
kevman 0:38ceb79fef03 176 * subject Name
kevman 0:38ceb79fef03 177 */
kevman 0:38ceb79fef03 178 csr->subject_raw.p = p;
kevman 0:38ceb79fef03 179
kevman 0:38ceb79fef03 180 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
kevman 0:38ceb79fef03 181 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
kevman 0:38ceb79fef03 182 {
kevman 0:38ceb79fef03 183 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 184 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
kevman 0:38ceb79fef03 185 }
kevman 0:38ceb79fef03 186
kevman 0:38ceb79fef03 187 if( ( ret = mbedtls_x509_get_name( &p, p + len, &csr->subject ) ) != 0 )
kevman 0:38ceb79fef03 188 {
kevman 0:38ceb79fef03 189 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 190 return( ret );
kevman 0:38ceb79fef03 191 }
kevman 0:38ceb79fef03 192
kevman 0:38ceb79fef03 193 csr->subject_raw.len = p - csr->subject_raw.p;
kevman 0:38ceb79fef03 194
kevman 0:38ceb79fef03 195 /*
kevman 0:38ceb79fef03 196 * subjectPKInfo SubjectPublicKeyInfo
kevman 0:38ceb79fef03 197 */
kevman 0:38ceb79fef03 198 if( ( ret = mbedtls_pk_parse_subpubkey( &p, end, &csr->pk ) ) != 0 )
kevman 0:38ceb79fef03 199 {
kevman 0:38ceb79fef03 200 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 201 return( ret );
kevman 0:38ceb79fef03 202 }
kevman 0:38ceb79fef03 203
kevman 0:38ceb79fef03 204 /*
kevman 0:38ceb79fef03 205 * attributes [0] Attributes
kevman 0:38ceb79fef03 206 *
kevman 0:38ceb79fef03 207 * The list of possible attributes is open-ended, though RFC 2985
kevman 0:38ceb79fef03 208 * (PKCS#9) defines a few in section 5.4. We currently don't support any,
kevman 0:38ceb79fef03 209 * so we just ignore them. This is a safe thing to do as the worst thing
kevman 0:38ceb79fef03 210 * that could happen is that we issue a certificate that does not match
kevman 0:38ceb79fef03 211 * the requester's expectations - this cannot cause a violation of our
kevman 0:38ceb79fef03 212 * signature policies.
kevman 0:38ceb79fef03 213 */
kevman 0:38ceb79fef03 214 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
kevman 0:38ceb79fef03 215 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC ) ) != 0 )
kevman 0:38ceb79fef03 216 {
kevman 0:38ceb79fef03 217 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 218 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
kevman 0:38ceb79fef03 219 }
kevman 0:38ceb79fef03 220
kevman 0:38ceb79fef03 221 p += len;
kevman 0:38ceb79fef03 222
kevman 0:38ceb79fef03 223 end = csr->raw.p + csr->raw.len;
kevman 0:38ceb79fef03 224
kevman 0:38ceb79fef03 225 /*
kevman 0:38ceb79fef03 226 * signatureAlgorithm AlgorithmIdentifier,
kevman 0:38ceb79fef03 227 * signature BIT STRING
kevman 0:38ceb79fef03 228 */
kevman 0:38ceb79fef03 229 if( ( ret = mbedtls_x509_get_alg( &p, end, &csr->sig_oid, &sig_params ) ) != 0 )
kevman 0:38ceb79fef03 230 {
kevman 0:38ceb79fef03 231 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 232 return( ret );
kevman 0:38ceb79fef03 233 }
kevman 0:38ceb79fef03 234
kevman 0:38ceb79fef03 235 if( ( ret = mbedtls_x509_get_sig_alg( &csr->sig_oid, &sig_params,
kevman 0:38ceb79fef03 236 &csr->sig_md, &csr->sig_pk,
kevman 0:38ceb79fef03 237 &csr->sig_opts ) ) != 0 )
kevman 0:38ceb79fef03 238 {
kevman 0:38ceb79fef03 239 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 240 return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG );
kevman 0:38ceb79fef03 241 }
kevman 0:38ceb79fef03 242
kevman 0:38ceb79fef03 243 if( ( ret = mbedtls_x509_get_sig( &p, end, &csr->sig ) ) != 0 )
kevman 0:38ceb79fef03 244 {
kevman 0:38ceb79fef03 245 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 246 return( ret );
kevman 0:38ceb79fef03 247 }
kevman 0:38ceb79fef03 248
kevman 0:38ceb79fef03 249 if( p != end )
kevman 0:38ceb79fef03 250 {
kevman 0:38ceb79fef03 251 mbedtls_x509_csr_free( csr );
kevman 0:38ceb79fef03 252 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
kevman 0:38ceb79fef03 253 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
kevman 0:38ceb79fef03 254 }
kevman 0:38ceb79fef03 255
kevman 0:38ceb79fef03 256 return( 0 );
kevman 0:38ceb79fef03 257 }
kevman 0:38ceb79fef03 258
kevman 0:38ceb79fef03 259 /*
kevman 0:38ceb79fef03 260 * Parse a CSR, allowing for PEM or raw DER encoding
kevman 0:38ceb79fef03 261 */
kevman 0:38ceb79fef03 262 int mbedtls_x509_csr_parse( mbedtls_x509_csr *csr, const unsigned char *buf, size_t buflen )
kevman 0:38ceb79fef03 263 {
kevman 0:38ceb79fef03 264 #if defined(MBEDTLS_PEM_PARSE_C)
kevman 0:38ceb79fef03 265 int ret;
kevman 0:38ceb79fef03 266 size_t use_len;
kevman 0:38ceb79fef03 267 mbedtls_pem_context pem;
kevman 0:38ceb79fef03 268 #endif
kevman 0:38ceb79fef03 269
kevman 0:38ceb79fef03 270 /*
kevman 0:38ceb79fef03 271 * Check for valid input
kevman 0:38ceb79fef03 272 */
kevman 0:38ceb79fef03 273 if( csr == NULL || buf == NULL || buflen == 0 )
kevman 0:38ceb79fef03 274 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 275
kevman 0:38ceb79fef03 276 #if defined(MBEDTLS_PEM_PARSE_C)
kevman 0:38ceb79fef03 277 /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
kevman 0:38ceb79fef03 278 if( buf[buflen - 1] == '\0' )
kevman 0:38ceb79fef03 279 {
kevman 0:38ceb79fef03 280 mbedtls_pem_init( &pem );
kevman 0:38ceb79fef03 281 ret = mbedtls_pem_read_buffer( &pem,
kevman 0:38ceb79fef03 282 "-----BEGIN CERTIFICATE REQUEST-----",
kevman 0:38ceb79fef03 283 "-----END CERTIFICATE REQUEST-----",
kevman 0:38ceb79fef03 284 buf, NULL, 0, &use_len );
kevman 0:38ceb79fef03 285
kevman 0:38ceb79fef03 286 if( ret == 0 )
kevman 0:38ceb79fef03 287 /*
kevman 0:38ceb79fef03 288 * Was PEM encoded, parse the result
kevman 0:38ceb79fef03 289 */
kevman 0:38ceb79fef03 290 ret = mbedtls_x509_csr_parse_der( csr, pem.buf, pem.buflen );
kevman 0:38ceb79fef03 291
kevman 0:38ceb79fef03 292 mbedtls_pem_free( &pem );
kevman 0:38ceb79fef03 293 if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
kevman 0:38ceb79fef03 294 return( ret );
kevman 0:38ceb79fef03 295 }
kevman 0:38ceb79fef03 296 #endif /* MBEDTLS_PEM_PARSE_C */
kevman 0:38ceb79fef03 297 return( mbedtls_x509_csr_parse_der( csr, buf, buflen ) );
kevman 0:38ceb79fef03 298 }
kevman 0:38ceb79fef03 299
kevman 0:38ceb79fef03 300 #if defined(MBEDTLS_FS_IO)
kevman 0:38ceb79fef03 301 /*
kevman 0:38ceb79fef03 302 * Load a CSR into the structure
kevman 0:38ceb79fef03 303 */
kevman 0:38ceb79fef03 304 int mbedtls_x509_csr_parse_file( mbedtls_x509_csr *csr, const char *path )
kevman 0:38ceb79fef03 305 {
kevman 0:38ceb79fef03 306 int ret;
kevman 0:38ceb79fef03 307 size_t n;
kevman 0:38ceb79fef03 308 unsigned char *buf;
kevman 0:38ceb79fef03 309
kevman 0:38ceb79fef03 310 if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
kevman 0:38ceb79fef03 311 return( ret );
kevman 0:38ceb79fef03 312
kevman 0:38ceb79fef03 313 ret = mbedtls_x509_csr_parse( csr, buf, n );
kevman 0:38ceb79fef03 314
kevman 0:38ceb79fef03 315 mbedtls_platform_zeroize( buf, n );
kevman 0:38ceb79fef03 316 mbedtls_free( buf );
kevman 0:38ceb79fef03 317
kevman 0:38ceb79fef03 318 return( ret );
kevman 0:38ceb79fef03 319 }
kevman 0:38ceb79fef03 320 #endif /* MBEDTLS_FS_IO */
kevman 0:38ceb79fef03 321
kevman 0:38ceb79fef03 322 #define BEFORE_COLON 14
kevman 0:38ceb79fef03 323 #define BC "14"
kevman 0:38ceb79fef03 324 /*
kevman 0:38ceb79fef03 325 * Return an informational string about the CSR.
kevman 0:38ceb79fef03 326 */
kevman 0:38ceb79fef03 327 int mbedtls_x509_csr_info( char *buf, size_t size, const char *prefix,
kevman 0:38ceb79fef03 328 const mbedtls_x509_csr *csr )
kevman 0:38ceb79fef03 329 {
kevman 0:38ceb79fef03 330 int ret;
kevman 0:38ceb79fef03 331 size_t n;
kevman 0:38ceb79fef03 332 char *p;
kevman 0:38ceb79fef03 333 char key_size_str[BEFORE_COLON];
kevman 0:38ceb79fef03 334
kevman 0:38ceb79fef03 335 p = buf;
kevman 0:38ceb79fef03 336 n = size;
kevman 0:38ceb79fef03 337
kevman 0:38ceb79fef03 338 ret = mbedtls_snprintf( p, n, "%sCSR version : %d",
kevman 0:38ceb79fef03 339 prefix, csr->version );
kevman 0:38ceb79fef03 340 MBEDTLS_X509_SAFE_SNPRINTF;
kevman 0:38ceb79fef03 341
kevman 0:38ceb79fef03 342 ret = mbedtls_snprintf( p, n, "\n%ssubject name : ", prefix );
kevman 0:38ceb79fef03 343 MBEDTLS_X509_SAFE_SNPRINTF;
kevman 0:38ceb79fef03 344 ret = mbedtls_x509_dn_gets( p, n, &csr->subject );
kevman 0:38ceb79fef03 345 MBEDTLS_X509_SAFE_SNPRINTF;
kevman 0:38ceb79fef03 346
kevman 0:38ceb79fef03 347 ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix );
kevman 0:38ceb79fef03 348 MBEDTLS_X509_SAFE_SNPRINTF;
kevman 0:38ceb79fef03 349
kevman 0:38ceb79fef03 350 ret = mbedtls_x509_sig_alg_gets( p, n, &csr->sig_oid, csr->sig_pk, csr->sig_md,
kevman 0:38ceb79fef03 351 csr->sig_opts );
kevman 0:38ceb79fef03 352 MBEDTLS_X509_SAFE_SNPRINTF;
kevman 0:38ceb79fef03 353
kevman 0:38ceb79fef03 354 if( ( ret = mbedtls_x509_key_size_helper( key_size_str, BEFORE_COLON,
kevman 0:38ceb79fef03 355 mbedtls_pk_get_name( &csr->pk ) ) ) != 0 )
kevman 0:38ceb79fef03 356 {
kevman 0:38ceb79fef03 357 return( ret );
kevman 0:38ceb79fef03 358 }
kevman 0:38ceb79fef03 359
kevman 0:38ceb79fef03 360 ret = mbedtls_snprintf( p, n, "\n%s%-" BC "s: %d bits\n", prefix, key_size_str,
kevman 0:38ceb79fef03 361 (int) mbedtls_pk_get_bitlen( &csr->pk ) );
kevman 0:38ceb79fef03 362 MBEDTLS_X509_SAFE_SNPRINTF;
kevman 0:38ceb79fef03 363
kevman 0:38ceb79fef03 364 return( (int) ( size - n ) );
kevman 0:38ceb79fef03 365 }
kevman 0:38ceb79fef03 366
kevman 0:38ceb79fef03 367 /*
kevman 0:38ceb79fef03 368 * Initialize a CSR
kevman 0:38ceb79fef03 369 */
kevman 0:38ceb79fef03 370 void mbedtls_x509_csr_init( mbedtls_x509_csr *csr )
kevman 0:38ceb79fef03 371 {
kevman 0:38ceb79fef03 372 memset( csr, 0, sizeof(mbedtls_x509_csr) );
kevman 0:38ceb79fef03 373 }
kevman 0:38ceb79fef03 374
kevman 0:38ceb79fef03 375 /*
kevman 0:38ceb79fef03 376 * Unallocate all CSR data
kevman 0:38ceb79fef03 377 */
kevman 0:38ceb79fef03 378 void mbedtls_x509_csr_free( mbedtls_x509_csr *csr )
kevman 0:38ceb79fef03 379 {
kevman 0:38ceb79fef03 380 mbedtls_x509_name *name_cur;
kevman 0:38ceb79fef03 381 mbedtls_x509_name *name_prv;
kevman 0:38ceb79fef03 382
kevman 0:38ceb79fef03 383 if( csr == NULL )
kevman 0:38ceb79fef03 384 return;
kevman 0:38ceb79fef03 385
kevman 0:38ceb79fef03 386 mbedtls_pk_free( &csr->pk );
kevman 0:38ceb79fef03 387
kevman 0:38ceb79fef03 388 #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
kevman 0:38ceb79fef03 389 mbedtls_free( csr->sig_opts );
kevman 0:38ceb79fef03 390 #endif
kevman 0:38ceb79fef03 391
kevman 0:38ceb79fef03 392 name_cur = csr->subject.next;
kevman 0:38ceb79fef03 393 while( name_cur != NULL )
kevman 0:38ceb79fef03 394 {
kevman 0:38ceb79fef03 395 name_prv = name_cur;
kevman 0:38ceb79fef03 396 name_cur = name_cur->next;
kevman 0:38ceb79fef03 397 mbedtls_platform_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
kevman 0:38ceb79fef03 398 mbedtls_free( name_prv );
kevman 0:38ceb79fef03 399 }
kevman 0:38ceb79fef03 400
kevman 0:38ceb79fef03 401 if( csr->raw.p != NULL )
kevman 0:38ceb79fef03 402 {
kevman 0:38ceb79fef03 403 mbedtls_platform_zeroize( csr->raw.p, csr->raw.len );
kevman 0:38ceb79fef03 404 mbedtls_free( csr->raw.p );
kevman 0:38ceb79fef03 405 }
kevman 0:38ceb79fef03 406
kevman 0:38ceb79fef03 407 mbedtls_platform_zeroize( csr, sizeof( mbedtls_x509_csr ) );
kevman 0:38ceb79fef03 408 }
kevman 0:38ceb79fef03 409
kevman 0:38ceb79fef03 410 #endif /* MBEDTLS_X509_CSR_PARSE_C */