Greg Steiert / pegasus_dev

Dependents:   blinky_max32630fthr

features/mbedtls/src/x509_csr.c@0:5c4d7b2438d3, 2016-11-11 (annotated)

Committer:
switches
Date:
Fri Nov 11 20:59:50 2016 +0000
Revision:
0:5c4d7b2438d3
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
switches 0:5c4d7b2438d3 1 /*
switches 0:5c4d7b2438d3 2 * X.509 Certificate Signing Request (CSR) parsing
switches 0:5c4d7b2438d3 3 *
switches 0:5c4d7b2438d3 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
switches 0:5c4d7b2438d3 5 * SPDX-License-Identifier: Apache-2.0
switches 0:5c4d7b2438d3 6 *
switches 0:5c4d7b2438d3 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
switches 0:5c4d7b2438d3 8 * not use this file except in compliance with the License.
switches 0:5c4d7b2438d3 9 * You may obtain a copy of the License at
switches 0:5c4d7b2438d3 10 *
switches 0:5c4d7b2438d3 11 * http://www.apache.org/licenses/LICENSE-2.0
switches 0:5c4d7b2438d3 12 *
switches 0:5c4d7b2438d3 13 * Unless required by applicable law or agreed to in writing, software
switches 0:5c4d7b2438d3 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
switches 0:5c4d7b2438d3 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
switches 0:5c4d7b2438d3 16 * See the License for the specific language governing permissions and
switches 0:5c4d7b2438d3 17 * limitations under the License.
switches 0:5c4d7b2438d3 18 *
switches 0:5c4d7b2438d3 19 * This file is part of mbed TLS (https://tls.mbed.org)
switches 0:5c4d7b2438d3 20 */
switches 0:5c4d7b2438d3 21 /*
switches 0:5c4d7b2438d3 22 * The ITU-T X.509 standard defines a certificate format for PKI.
switches 0:5c4d7b2438d3 23 *
switches 0:5c4d7b2438d3 24 * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
switches 0:5c4d7b2438d3 25 * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
switches 0:5c4d7b2438d3 26 * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
switches 0:5c4d7b2438d3 27 *
switches 0:5c4d7b2438d3 28 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
switches 0:5c4d7b2438d3 29 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
switches 0:5c4d7b2438d3 30 */
switches 0:5c4d7b2438d3 31
switches 0:5c4d7b2438d3 32 #if !defined(MBEDTLS_CONFIG_FILE)
switches 0:5c4d7b2438d3 33 #include "mbedtls/config.h"
switches 0:5c4d7b2438d3 34 #else
switches 0:5c4d7b2438d3 35 #include MBEDTLS_CONFIG_FILE
switches 0:5c4d7b2438d3 36 #endif
switches 0:5c4d7b2438d3 37
switches 0:5c4d7b2438d3 38 #if defined(MBEDTLS_X509_CSR_PARSE_C)
switches 0:5c4d7b2438d3 39
switches 0:5c4d7b2438d3 40 #include "mbedtls/x509_csr.h"
switches 0:5c4d7b2438d3 41 #include "mbedtls/oid.h"
switches 0:5c4d7b2438d3 42
switches 0:5c4d7b2438d3 43 #include <string.h>
switches 0:5c4d7b2438d3 44
switches 0:5c4d7b2438d3 45 #if defined(MBEDTLS_PEM_PARSE_C)
switches 0:5c4d7b2438d3 46 #include "mbedtls/pem.h"
switches 0:5c4d7b2438d3 47 #endif
switches 0:5c4d7b2438d3 48
switches 0:5c4d7b2438d3 49 #if defined(MBEDTLS_PLATFORM_C)
switches 0:5c4d7b2438d3 50 #include "mbedtls/platform.h"
switches 0:5c4d7b2438d3 51 #else
switches 0:5c4d7b2438d3 52 #include <stdlib.h>
switches 0:5c4d7b2438d3 53 #include <stdio.h>
switches 0:5c4d7b2438d3 54 #define mbedtls_free free
switches 0:5c4d7b2438d3 55 #define mbedtls_calloc calloc
switches 0:5c4d7b2438d3 56 #define mbedtls_snprintf snprintf
switches 0:5c4d7b2438d3 57 #endif
switches 0:5c4d7b2438d3 58
switches 0:5c4d7b2438d3 59 #if defined(MBEDTLS_FS_IO) || defined(EFIX64) || defined(EFI32)
switches 0:5c4d7b2438d3 60 #include <stdio.h>
switches 0:5c4d7b2438d3 61 #endif
switches 0:5c4d7b2438d3 62
switches 0:5c4d7b2438d3 63 /* Implementation that should never be optimized out by the compiler */
switches 0:5c4d7b2438d3 64 static void mbedtls_zeroize( void *v, size_t n ) {
switches 0:5c4d7b2438d3 65 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
switches 0:5c4d7b2438d3 66 }
switches 0:5c4d7b2438d3 67
switches 0:5c4d7b2438d3 68 /*
switches 0:5c4d7b2438d3 69 * Version ::= INTEGER { v1(0) }
switches 0:5c4d7b2438d3 70 */
switches 0:5c4d7b2438d3 71 static int x509_csr_get_version( unsigned char **p,
switches 0:5c4d7b2438d3 72 const unsigned char *end,
switches 0:5c4d7b2438d3 73 int *ver )
switches 0:5c4d7b2438d3 74 {
switches 0:5c4d7b2438d3 75 int ret;
switches 0:5c4d7b2438d3 76
switches 0:5c4d7b2438d3 77 if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
switches 0:5c4d7b2438d3 78 {
switches 0:5c4d7b2438d3 79 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
switches 0:5c4d7b2438d3 80 {
switches 0:5c4d7b2438d3 81 *ver = 0;
switches 0:5c4d7b2438d3 82 return( 0 );
switches 0:5c4d7b2438d3 83 }
switches 0:5c4d7b2438d3 84
switches 0:5c4d7b2438d3 85 return( MBEDTLS_ERR_X509_INVALID_VERSION + ret );
switches 0:5c4d7b2438d3 86 }
switches 0:5c4d7b2438d3 87
switches 0:5c4d7b2438d3 88 return( 0 );
switches 0:5c4d7b2438d3 89 }
switches 0:5c4d7b2438d3 90
switches 0:5c4d7b2438d3 91 /*
switches 0:5c4d7b2438d3 92 * Parse a CSR in DER format
switches 0:5c4d7b2438d3 93 */
switches 0:5c4d7b2438d3 94 int mbedtls_x509_csr_parse_der( mbedtls_x509_csr *csr,
switches 0:5c4d7b2438d3 95 const unsigned char *buf, size_t buflen )
switches 0:5c4d7b2438d3 96 {
switches 0:5c4d7b2438d3 97 int ret;
switches 0:5c4d7b2438d3 98 size_t len;
switches 0:5c4d7b2438d3 99 unsigned char *p, *end;
switches 0:5c4d7b2438d3 100 mbedtls_x509_buf sig_params;
switches 0:5c4d7b2438d3 101
switches 0:5c4d7b2438d3 102 memset( &sig_params, 0, sizeof( mbedtls_x509_buf ) );
switches 0:5c4d7b2438d3 103
switches 0:5c4d7b2438d3 104 /*
switches 0:5c4d7b2438d3 105 * Check for valid input
switches 0:5c4d7b2438d3 106 */
switches 0:5c4d7b2438d3 107 if( csr == NULL || buf == NULL || buflen == 0 )
switches 0:5c4d7b2438d3 108 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
switches 0:5c4d7b2438d3 109
switches 0:5c4d7b2438d3 110 mbedtls_x509_csr_init( csr );
switches 0:5c4d7b2438d3 111
switches 0:5c4d7b2438d3 112 /*
switches 0:5c4d7b2438d3 113 * first copy the raw DER data
switches 0:5c4d7b2438d3 114 */
switches 0:5c4d7b2438d3 115 p = mbedtls_calloc( 1, len = buflen );
switches 0:5c4d7b2438d3 116
switches 0:5c4d7b2438d3 117 if( p == NULL )
switches 0:5c4d7b2438d3 118 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
switches 0:5c4d7b2438d3 119
switches 0:5c4d7b2438d3 120 memcpy( p, buf, buflen );
switches 0:5c4d7b2438d3 121
switches 0:5c4d7b2438d3 122 csr->raw.p = p;
switches 0:5c4d7b2438d3 123 csr->raw.len = len;
switches 0:5c4d7b2438d3 124 end = p + len;
switches 0:5c4d7b2438d3 125
switches 0:5c4d7b2438d3 126 /*
switches 0:5c4d7b2438d3 127 * CertificationRequest ::= SEQUENCE {
switches 0:5c4d7b2438d3 128 * certificationRequestInfo CertificationRequestInfo,
switches 0:5c4d7b2438d3 129 * signatureAlgorithm AlgorithmIdentifier,
switches 0:5c4d7b2438d3 130 * signature BIT STRING
switches 0:5c4d7b2438d3 131 * }
switches 0:5c4d7b2438d3 132 */
switches 0:5c4d7b2438d3 133 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
switches 0:5c4d7b2438d3 134 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
switches 0:5c4d7b2438d3 135 {
switches 0:5c4d7b2438d3 136 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 137 return( MBEDTLS_ERR_X509_INVALID_FORMAT );
switches 0:5c4d7b2438d3 138 }
switches 0:5c4d7b2438d3 139
switches 0:5c4d7b2438d3 140 if( len != (size_t) ( end - p ) )
switches 0:5c4d7b2438d3 141 {
switches 0:5c4d7b2438d3 142 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 143 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
switches 0:5c4d7b2438d3 144 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
switches 0:5c4d7b2438d3 145 }
switches 0:5c4d7b2438d3 146
switches 0:5c4d7b2438d3 147 /*
switches 0:5c4d7b2438d3 148 * CertificationRequestInfo ::= SEQUENCE {
switches 0:5c4d7b2438d3 149 */
switches 0:5c4d7b2438d3 150 csr->cri.p = p;
switches 0:5c4d7b2438d3 151
switches 0:5c4d7b2438d3 152 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
switches 0:5c4d7b2438d3 153 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
switches 0:5c4d7b2438d3 154 {
switches 0:5c4d7b2438d3 155 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 156 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 157 }
switches 0:5c4d7b2438d3 158
switches 0:5c4d7b2438d3 159 end = p + len;
switches 0:5c4d7b2438d3 160 csr->cri.len = end - csr->cri.p;
switches 0:5c4d7b2438d3 161
switches 0:5c4d7b2438d3 162 /*
switches 0:5c4d7b2438d3 163 * Version ::= INTEGER { v1(0) }
switches 0:5c4d7b2438d3 164 */
switches 0:5c4d7b2438d3 165 if( ( ret = x509_csr_get_version( &p, end, &csr->version ) ) != 0 )
switches 0:5c4d7b2438d3 166 {
switches 0:5c4d7b2438d3 167 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 168 return( ret );
switches 0:5c4d7b2438d3 169 }
switches 0:5c4d7b2438d3 170
switches 0:5c4d7b2438d3 171 csr->version++;
switches 0:5c4d7b2438d3 172
switches 0:5c4d7b2438d3 173 if( csr->version != 1 )
switches 0:5c4d7b2438d3 174 {
switches 0:5c4d7b2438d3 175 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 176 return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
switches 0:5c4d7b2438d3 177 }
switches 0:5c4d7b2438d3 178
switches 0:5c4d7b2438d3 179 /*
switches 0:5c4d7b2438d3 180 * subject Name
switches 0:5c4d7b2438d3 181 */
switches 0:5c4d7b2438d3 182 csr->subject_raw.p = p;
switches 0:5c4d7b2438d3 183
switches 0:5c4d7b2438d3 184 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
switches 0:5c4d7b2438d3 185 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
switches 0:5c4d7b2438d3 186 {
switches 0:5c4d7b2438d3 187 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 188 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 189 }
switches 0:5c4d7b2438d3 190
switches 0:5c4d7b2438d3 191 if( ( ret = mbedtls_x509_get_name( &p, p + len, &csr->subject ) ) != 0 )
switches 0:5c4d7b2438d3 192 {
switches 0:5c4d7b2438d3 193 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 194 return( ret );
switches 0:5c4d7b2438d3 195 }
switches 0:5c4d7b2438d3 196
switches 0:5c4d7b2438d3 197 csr->subject_raw.len = p - csr->subject_raw.p;
switches 0:5c4d7b2438d3 198
switches 0:5c4d7b2438d3 199 /*
switches 0:5c4d7b2438d3 200 * subjectPKInfo SubjectPublicKeyInfo
switches 0:5c4d7b2438d3 201 */
switches 0:5c4d7b2438d3 202 if( ( ret = mbedtls_pk_parse_subpubkey( &p, end, &csr->pk ) ) != 0 )
switches 0:5c4d7b2438d3 203 {
switches 0:5c4d7b2438d3 204 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 205 return( ret );
switches 0:5c4d7b2438d3 206 }
switches 0:5c4d7b2438d3 207
switches 0:5c4d7b2438d3 208 /*
switches 0:5c4d7b2438d3 209 * attributes [0] Attributes
switches 0:5c4d7b2438d3 210 *
switches 0:5c4d7b2438d3 211 * The list of possible attributes is open-ended, though RFC 2985
switches 0:5c4d7b2438d3 212 * (PKCS#9) defines a few in section 5.4. We currently don't support any,
switches 0:5c4d7b2438d3 213 * so we just ignore them. This is a safe thing to do as the worst thing
switches 0:5c4d7b2438d3 214 * that could happen is that we issue a certificate that does not match
switches 0:5c4d7b2438d3 215 * the requester's expectations - this cannot cause a violation of our
switches 0:5c4d7b2438d3 216 * signature policies.
switches 0:5c4d7b2438d3 217 */
switches 0:5c4d7b2438d3 218 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
switches 0:5c4d7b2438d3 219 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC ) ) != 0 )
switches 0:5c4d7b2438d3 220 {
switches 0:5c4d7b2438d3 221 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 222 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
switches 0:5c4d7b2438d3 223 }
switches 0:5c4d7b2438d3 224
switches 0:5c4d7b2438d3 225 p += len;
switches 0:5c4d7b2438d3 226
switches 0:5c4d7b2438d3 227 end = csr->raw.p + csr->raw.len;
switches 0:5c4d7b2438d3 228
switches 0:5c4d7b2438d3 229 /*
switches 0:5c4d7b2438d3 230 * signatureAlgorithm AlgorithmIdentifier,
switches 0:5c4d7b2438d3 231 * signature BIT STRING
switches 0:5c4d7b2438d3 232 */
switches 0:5c4d7b2438d3 233 if( ( ret = mbedtls_x509_get_alg( &p, end, &csr->sig_oid, &sig_params ) ) != 0 )
switches 0:5c4d7b2438d3 234 {
switches 0:5c4d7b2438d3 235 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 236 return( ret );
switches 0:5c4d7b2438d3 237 }
switches 0:5c4d7b2438d3 238
switches 0:5c4d7b2438d3 239 if( ( ret = mbedtls_x509_get_sig_alg( &csr->sig_oid, &sig_params,
switches 0:5c4d7b2438d3 240 &csr->sig_md, &csr->sig_pk,
switches 0:5c4d7b2438d3 241 &csr->sig_opts ) ) != 0 )
switches 0:5c4d7b2438d3 242 {
switches 0:5c4d7b2438d3 243 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 244 return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG );
switches 0:5c4d7b2438d3 245 }
switches 0:5c4d7b2438d3 246
switches 0:5c4d7b2438d3 247 if( ( ret = mbedtls_x509_get_sig( &p, end, &csr->sig ) ) != 0 )
switches 0:5c4d7b2438d3 248 {
switches 0:5c4d7b2438d3 249 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 250 return( ret );
switches 0:5c4d7b2438d3 251 }
switches 0:5c4d7b2438d3 252
switches 0:5c4d7b2438d3 253 if( p != end )
switches 0:5c4d7b2438d3 254 {
switches 0:5c4d7b2438d3 255 mbedtls_x509_csr_free( csr );
switches 0:5c4d7b2438d3 256 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
switches 0:5c4d7b2438d3 257 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
switches 0:5c4d7b2438d3 258 }
switches 0:5c4d7b2438d3 259
switches 0:5c4d7b2438d3 260 return( 0 );
switches 0:5c4d7b2438d3 261 }
switches 0:5c4d7b2438d3 262
switches 0:5c4d7b2438d3 263 /*
switches 0:5c4d7b2438d3 264 * Parse a CSR, allowing for PEM or raw DER encoding
switches 0:5c4d7b2438d3 265 */
switches 0:5c4d7b2438d3 266 int mbedtls_x509_csr_parse( mbedtls_x509_csr *csr, const unsigned char *buf, size_t buflen )
switches 0:5c4d7b2438d3 267 {
switches 0:5c4d7b2438d3 268 int ret;
switches 0:5c4d7b2438d3 269 #if defined(MBEDTLS_PEM_PARSE_C)
switches 0:5c4d7b2438d3 270 size_t use_len;
switches 0:5c4d7b2438d3 271 mbedtls_pem_context pem;
switches 0:5c4d7b2438d3 272 #endif
switches 0:5c4d7b2438d3 273
switches 0:5c4d7b2438d3 274 /*
switches 0:5c4d7b2438d3 275 * Check for valid input
switches 0:5c4d7b2438d3 276 */
switches 0:5c4d7b2438d3 277 if( csr == NULL || buf == NULL || buflen == 0 )
switches 0:5c4d7b2438d3 278 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
switches 0:5c4d7b2438d3 279
switches 0:5c4d7b2438d3 280 #if defined(MBEDTLS_PEM_PARSE_C)
switches 0:5c4d7b2438d3 281 mbedtls_pem_init( &pem );
switches 0:5c4d7b2438d3 282
switches 0:5c4d7b2438d3 283 /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
switches 0:5c4d7b2438d3 284 if( buf[buflen - 1] != '\0' )
switches 0:5c4d7b2438d3 285 ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
switches 0:5c4d7b2438d3 286 else
switches 0:5c4d7b2438d3 287 ret = mbedtls_pem_read_buffer( &pem,
switches 0:5c4d7b2438d3 288 "-----BEGIN CERTIFICATE REQUEST-----",
switches 0:5c4d7b2438d3 289 "-----END CERTIFICATE REQUEST-----",
switches 0:5c4d7b2438d3 290 buf, NULL, 0, &use_len );
switches 0:5c4d7b2438d3 291
switches 0:5c4d7b2438d3 292 if( ret == 0 )
switches 0:5c4d7b2438d3 293 {
switches 0:5c4d7b2438d3 294 /*
switches 0:5c4d7b2438d3 295 * Was PEM encoded, parse the result
switches 0:5c4d7b2438d3 296 */
switches 0:5c4d7b2438d3 297 if( ( ret = mbedtls_x509_csr_parse_der( csr, pem.buf, pem.buflen ) ) != 0 )
switches 0:5c4d7b2438d3 298 return( ret );
switches 0:5c4d7b2438d3 299
switches 0:5c4d7b2438d3 300 mbedtls_pem_free( &pem );
switches 0:5c4d7b2438d3 301 return( 0 );
switches 0:5c4d7b2438d3 302 }
switches 0:5c4d7b2438d3 303 else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
switches 0:5c4d7b2438d3 304 {
switches 0:5c4d7b2438d3 305 mbedtls_pem_free( &pem );
switches 0:5c4d7b2438d3 306 return( ret );
switches 0:5c4d7b2438d3 307 }
switches 0:5c4d7b2438d3 308 else
switches 0:5c4d7b2438d3 309 #endif /* MBEDTLS_PEM_PARSE_C */
switches 0:5c4d7b2438d3 310 return( mbedtls_x509_csr_parse_der( csr, buf, buflen ) );
switches 0:5c4d7b2438d3 311 }
switches 0:5c4d7b2438d3 312
switches 0:5c4d7b2438d3 313 #if defined(MBEDTLS_FS_IO)
switches 0:5c4d7b2438d3 314 /*
switches 0:5c4d7b2438d3 315 * Load a CSR into the structure
switches 0:5c4d7b2438d3 316 */
switches 0:5c4d7b2438d3 317 int mbedtls_x509_csr_parse_file( mbedtls_x509_csr *csr, const char *path )
switches 0:5c4d7b2438d3 318 {
switches 0:5c4d7b2438d3 319 int ret;
switches 0:5c4d7b2438d3 320 size_t n;
switches 0:5c4d7b2438d3 321 unsigned char *buf;
switches 0:5c4d7b2438d3 322
switches 0:5c4d7b2438d3 323 if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
switches 0:5c4d7b2438d3 324 return( ret );
switches 0:5c4d7b2438d3 325
switches 0:5c4d7b2438d3 326 ret = mbedtls_x509_csr_parse( csr, buf, n );
switches 0:5c4d7b2438d3 327
switches 0:5c4d7b2438d3 328 mbedtls_zeroize( buf, n );
switches 0:5c4d7b2438d3 329 mbedtls_free( buf );
switches 0:5c4d7b2438d3 330
switches 0:5c4d7b2438d3 331 return( ret );
switches 0:5c4d7b2438d3 332 }
switches 0:5c4d7b2438d3 333 #endif /* MBEDTLS_FS_IO */
switches 0:5c4d7b2438d3 334
switches 0:5c4d7b2438d3 335 #define BEFORE_COLON 14
switches 0:5c4d7b2438d3 336 #define BC "14"
switches 0:5c4d7b2438d3 337 /*
switches 0:5c4d7b2438d3 338 * Return an informational string about the CSR.
switches 0:5c4d7b2438d3 339 */
switches 0:5c4d7b2438d3 340 int mbedtls_x509_csr_info( char *buf, size_t size, const char *prefix,
switches 0:5c4d7b2438d3 341 const mbedtls_x509_csr *csr )
switches 0:5c4d7b2438d3 342 {
switches 0:5c4d7b2438d3 343 int ret;
switches 0:5c4d7b2438d3 344 size_t n;
switches 0:5c4d7b2438d3 345 char *p;
switches 0:5c4d7b2438d3 346 char key_size_str[BEFORE_COLON];
switches 0:5c4d7b2438d3 347
switches 0:5c4d7b2438d3 348 p = buf;
switches 0:5c4d7b2438d3 349 n = size;
switches 0:5c4d7b2438d3 350
switches 0:5c4d7b2438d3 351 ret = mbedtls_snprintf( p, n, "%sCSR version : %d",
switches 0:5c4d7b2438d3 352 prefix, csr->version );
switches 0:5c4d7b2438d3 353 MBEDTLS_X509_SAFE_SNPRINTF;
switches 0:5c4d7b2438d3 354
switches 0:5c4d7b2438d3 355 ret = mbedtls_snprintf( p, n, "\n%ssubject name : ", prefix );
switches 0:5c4d7b2438d3 356 MBEDTLS_X509_SAFE_SNPRINTF;
switches 0:5c4d7b2438d3 357 ret = mbedtls_x509_dn_gets( p, n, &csr->subject );
switches 0:5c4d7b2438d3 358 MBEDTLS_X509_SAFE_SNPRINTF;
switches 0:5c4d7b2438d3 359
switches 0:5c4d7b2438d3 360 ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix );
switches 0:5c4d7b2438d3 361 MBEDTLS_X509_SAFE_SNPRINTF;
switches 0:5c4d7b2438d3 362
switches 0:5c4d7b2438d3 363 ret = mbedtls_x509_sig_alg_gets( p, n, &csr->sig_oid, csr->sig_pk, csr->sig_md,
switches 0:5c4d7b2438d3 364 csr->sig_opts );
switches 0:5c4d7b2438d3 365 MBEDTLS_X509_SAFE_SNPRINTF;
switches 0:5c4d7b2438d3 366
switches 0:5c4d7b2438d3 367 if( ( ret = mbedtls_x509_key_size_helper( key_size_str, BEFORE_COLON,
switches 0:5c4d7b2438d3 368 mbedtls_pk_get_name( &csr->pk ) ) ) != 0 )
switches 0:5c4d7b2438d3 369 {
switches 0:5c4d7b2438d3 370 return( ret );
switches 0:5c4d7b2438d3 371 }
switches 0:5c4d7b2438d3 372
switches 0:5c4d7b2438d3 373 ret = mbedtls_snprintf( p, n, "\n%s%-" BC "s: %d bits\n", prefix, key_size_str,
switches 0:5c4d7b2438d3 374 (int) mbedtls_pk_get_bitlen( &csr->pk ) );
switches 0:5c4d7b2438d3 375 MBEDTLS_X509_SAFE_SNPRINTF;
switches 0:5c4d7b2438d3 376
switches 0:5c4d7b2438d3 377 return( (int) ( size - n ) );
switches 0:5c4d7b2438d3 378 }
switches 0:5c4d7b2438d3 379
switches 0:5c4d7b2438d3 380 /*
switches 0:5c4d7b2438d3 381 * Initialize a CSR
switches 0:5c4d7b2438d3 382 */
switches 0:5c4d7b2438d3 383 void mbedtls_x509_csr_init( mbedtls_x509_csr *csr )
switches 0:5c4d7b2438d3 384 {
switches 0:5c4d7b2438d3 385 memset( csr, 0, sizeof(mbedtls_x509_csr) );
switches 0:5c4d7b2438d3 386 }
switches 0:5c4d7b2438d3 387
switches 0:5c4d7b2438d3 388 /*
switches 0:5c4d7b2438d3 389 * Unallocate all CSR data
switches 0:5c4d7b2438d3 390 */
switches 0:5c4d7b2438d3 391 void mbedtls_x509_csr_free( mbedtls_x509_csr *csr )
switches 0:5c4d7b2438d3 392 {
switches 0:5c4d7b2438d3 393 mbedtls_x509_name *name_cur;
switches 0:5c4d7b2438d3 394 mbedtls_x509_name *name_prv;
switches 0:5c4d7b2438d3 395
switches 0:5c4d7b2438d3 396 if( csr == NULL )
switches 0:5c4d7b2438d3 397 return;
switches 0:5c4d7b2438d3 398
switches 0:5c4d7b2438d3 399 mbedtls_pk_free( &csr->pk );
switches 0:5c4d7b2438d3 400
switches 0:5c4d7b2438d3 401 #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
switches 0:5c4d7b2438d3 402 mbedtls_free( csr->sig_opts );
switches 0:5c4d7b2438d3 403 #endif
switches 0:5c4d7b2438d3 404
switches 0:5c4d7b2438d3 405 name_cur = csr->subject.next;
switches 0:5c4d7b2438d3 406 while( name_cur != NULL )
switches 0:5c4d7b2438d3 407 {
switches 0:5c4d7b2438d3 408 name_prv = name_cur;
switches 0:5c4d7b2438d3 409 name_cur = name_cur->next;
switches 0:5c4d7b2438d3 410 mbedtls_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
switches 0:5c4d7b2438d3 411 mbedtls_free( name_prv );
switches 0:5c4d7b2438d3 412 }
switches 0:5c4d7b2438d3 413
switches 0:5c4d7b2438d3 414 if( csr->raw.p != NULL )
switches 0:5c4d7b2438d3 415 {
switches 0:5c4d7b2438d3 416 mbedtls_zeroize( csr->raw.p, csr->raw.len );
switches 0:5c4d7b2438d3 417 mbedtls_free( csr->raw.p );
switches 0:5c4d7b2438d3 418 }
switches 0:5c4d7b2438d3 419
switches 0:5c4d7b2438d3 420 mbedtls_zeroize( csr, sizeof( mbedtls_x509_csr ) );
switches 0:5c4d7b2438d3 421 }
switches 0:5c4d7b2438d3 422
switches 0:5c4d7b2438d3 423 #endif /* MBEDTLS_X509_CSR_PARSE_C */