Marco Zecchini / Mbed OS Example_RTOS

Rtos API example

mbed-os/features/mbedtls/src/x509_csr.c@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
marcozecchini 0:9fca2b23d0ba 1 /*
marcozecchini 0:9fca2b23d0ba 2 * X.509 Certificate Signing Request (CSR) parsing
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
marcozecchini 0:9fca2b23d0ba 5 * SPDX-License-Identifier: Apache-2.0
marcozecchini 0:9fca2b23d0ba 6 *
marcozecchini 0:9fca2b23d0ba 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
marcozecchini 0:9fca2b23d0ba 8 * not use this file except in compliance with the License.
marcozecchini 0:9fca2b23d0ba 9 * You may obtain a copy of the License at
marcozecchini 0:9fca2b23d0ba 10 *
marcozecchini 0:9fca2b23d0ba 11 * http://www.apache.org/licenses/LICENSE-2.0
marcozecchini 0:9fca2b23d0ba 12 *
marcozecchini 0:9fca2b23d0ba 13 * Unless required by applicable law or agreed to in writing, software
marcozecchini 0:9fca2b23d0ba 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
marcozecchini 0:9fca2b23d0ba 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini 0:9fca2b23d0ba 16 * See the License for the specific language governing permissions and
marcozecchini 0:9fca2b23d0ba 17 * limitations under the License.
marcozecchini 0:9fca2b23d0ba 18 *
marcozecchini 0:9fca2b23d0ba 19 * This file is part of mbed TLS (https://tls.mbed.org)
marcozecchini 0:9fca2b23d0ba 20 */
marcozecchini 0:9fca2b23d0ba 21 /*
marcozecchini 0:9fca2b23d0ba 22 * The ITU-T X.509 standard defines a certificate format for PKI.
marcozecchini 0:9fca2b23d0ba 23 *
marcozecchini 0:9fca2b23d0ba 24 * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
marcozecchini 0:9fca2b23d0ba 25 * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
marcozecchini 0:9fca2b23d0ba 26 * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
marcozecchini 0:9fca2b23d0ba 27 *
marcozecchini 0:9fca2b23d0ba 28 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
marcozecchini 0:9fca2b23d0ba 29 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
marcozecchini 0:9fca2b23d0ba 30 */
marcozecchini 0:9fca2b23d0ba 31
marcozecchini 0:9fca2b23d0ba 32 #if !defined(MBEDTLS_CONFIG_FILE)
marcozecchini 0:9fca2b23d0ba 33 #include "mbedtls/config.h"
marcozecchini 0:9fca2b23d0ba 34 #else
marcozecchini 0:9fca2b23d0ba 35 #include MBEDTLS_CONFIG_FILE
marcozecchini 0:9fca2b23d0ba 36 #endif
marcozecchini 0:9fca2b23d0ba 37
marcozecchini 0:9fca2b23d0ba 38 #if defined(MBEDTLS_X509_CSR_PARSE_C)
marcozecchini 0:9fca2b23d0ba 39
marcozecchini 0:9fca2b23d0ba 40 #include "mbedtls/x509_csr.h"
marcozecchini 0:9fca2b23d0ba 41 #include "mbedtls/oid.h"
marcozecchini 0:9fca2b23d0ba 42
marcozecchini 0:9fca2b23d0ba 43 #include <string.h>
marcozecchini 0:9fca2b23d0ba 44
marcozecchini 0:9fca2b23d0ba 45 #if defined(MBEDTLS_PEM_PARSE_C)
marcozecchini 0:9fca2b23d0ba 46 #include "mbedtls/pem.h"
marcozecchini 0:9fca2b23d0ba 47 #endif
marcozecchini 0:9fca2b23d0ba 48
marcozecchini 0:9fca2b23d0ba 49 #if defined(MBEDTLS_PLATFORM_C)
marcozecchini 0:9fca2b23d0ba 50 #include "mbedtls/platform.h"
marcozecchini 0:9fca2b23d0ba 51 #else
marcozecchini 0:9fca2b23d0ba 52 #include <stdlib.h>
marcozecchini 0:9fca2b23d0ba 53 #include <stdio.h>
marcozecchini 0:9fca2b23d0ba 54 #define mbedtls_free free
marcozecchini 0:9fca2b23d0ba 55 #define mbedtls_calloc calloc
marcozecchini 0:9fca2b23d0ba 56 #define mbedtls_snprintf snprintf
marcozecchini 0:9fca2b23d0ba 57 #endif
marcozecchini 0:9fca2b23d0ba 58
marcozecchini 0:9fca2b23d0ba 59 #if defined(MBEDTLS_FS_IO) || defined(EFIX64) || defined(EFI32)
marcozecchini 0:9fca2b23d0ba 60 #include <stdio.h>
marcozecchini 0:9fca2b23d0ba 61 #endif
marcozecchini 0:9fca2b23d0ba 62
marcozecchini 0:9fca2b23d0ba 63 /* Implementation that should never be optimized out by the compiler */
marcozecchini 0:9fca2b23d0ba 64 static void mbedtls_zeroize( void *v, size_t n ) {
marcozecchini 0:9fca2b23d0ba 65 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
marcozecchini 0:9fca2b23d0ba 66 }
marcozecchini 0:9fca2b23d0ba 67
marcozecchini 0:9fca2b23d0ba 68 /*
marcozecchini 0:9fca2b23d0ba 69 * Version ::= INTEGER { v1(0) }
marcozecchini 0:9fca2b23d0ba 70 */
marcozecchini 0:9fca2b23d0ba 71 static int x509_csr_get_version( unsigned char **p,
marcozecchini 0:9fca2b23d0ba 72 const unsigned char *end,
marcozecchini 0:9fca2b23d0ba 73 int *ver )
marcozecchini 0:9fca2b23d0ba 74 {
marcozecchini 0:9fca2b23d0ba 75 int ret;
marcozecchini 0:9fca2b23d0ba 76
marcozecchini 0:9fca2b23d0ba 77 if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 78 {
marcozecchini 0:9fca2b23d0ba 79 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
marcozecchini 0:9fca2b23d0ba 80 {
marcozecchini 0:9fca2b23d0ba 81 *ver = 0;
marcozecchini 0:9fca2b23d0ba 82 return( 0 );
marcozecchini 0:9fca2b23d0ba 83 }
marcozecchini 0:9fca2b23d0ba 84
marcozecchini 0:9fca2b23d0ba 85 return( MBEDTLS_ERR_X509_INVALID_VERSION + ret );
marcozecchini 0:9fca2b23d0ba 86 }
marcozecchini 0:9fca2b23d0ba 87
marcozecchini 0:9fca2b23d0ba 88 return( 0 );
marcozecchini 0:9fca2b23d0ba 89 }
marcozecchini 0:9fca2b23d0ba 90
marcozecchini 0:9fca2b23d0ba 91 /*
marcozecchini 0:9fca2b23d0ba 92 * Parse a CSR in DER format
marcozecchini 0:9fca2b23d0ba 93 */
marcozecchini 0:9fca2b23d0ba 94 int mbedtls_x509_csr_parse_der( mbedtls_x509_csr *csr,
marcozecchini 0:9fca2b23d0ba 95 const unsigned char *buf, size_t buflen )
marcozecchini 0:9fca2b23d0ba 96 {
marcozecchini 0:9fca2b23d0ba 97 int ret;
marcozecchini 0:9fca2b23d0ba 98 size_t len;
marcozecchini 0:9fca2b23d0ba 99 unsigned char *p, *end;
marcozecchini 0:9fca2b23d0ba 100 mbedtls_x509_buf sig_params;
marcozecchini 0:9fca2b23d0ba 101
marcozecchini 0:9fca2b23d0ba 102 memset( &sig_params, 0, sizeof( mbedtls_x509_buf ) );
marcozecchini 0:9fca2b23d0ba 103
marcozecchini 0:9fca2b23d0ba 104 /*
marcozecchini 0:9fca2b23d0ba 105 * Check for valid input
marcozecchini 0:9fca2b23d0ba 106 */
marcozecchini 0:9fca2b23d0ba 107 if( csr == NULL || buf == NULL || buflen == 0 )
marcozecchini 0:9fca2b23d0ba 108 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 109
marcozecchini 0:9fca2b23d0ba 110 mbedtls_x509_csr_init( csr );
marcozecchini 0:9fca2b23d0ba 111
marcozecchini 0:9fca2b23d0ba 112 /*
marcozecchini 0:9fca2b23d0ba 113 * first copy the raw DER data
marcozecchini 0:9fca2b23d0ba 114 */
marcozecchini 0:9fca2b23d0ba 115 p = mbedtls_calloc( 1, len = buflen );
marcozecchini 0:9fca2b23d0ba 116
marcozecchini 0:9fca2b23d0ba 117 if( p == NULL )
marcozecchini 0:9fca2b23d0ba 118 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
marcozecchini 0:9fca2b23d0ba 119
marcozecchini 0:9fca2b23d0ba 120 memcpy( p, buf, buflen );
marcozecchini 0:9fca2b23d0ba 121
marcozecchini 0:9fca2b23d0ba 122 csr->raw.p = p;
marcozecchini 0:9fca2b23d0ba 123 csr->raw.len = len;
marcozecchini 0:9fca2b23d0ba 124 end = p + len;
marcozecchini 0:9fca2b23d0ba 125
marcozecchini 0:9fca2b23d0ba 126 /*
marcozecchini 0:9fca2b23d0ba 127 * CertificationRequest ::= SEQUENCE {
marcozecchini 0:9fca2b23d0ba 128 * certificationRequestInfo CertificationRequestInfo,
marcozecchini 0:9fca2b23d0ba 129 * signatureAlgorithm AlgorithmIdentifier,
marcozecchini 0:9fca2b23d0ba 130 * signature BIT STRING
marcozecchini 0:9fca2b23d0ba 131 * }
marcozecchini 0:9fca2b23d0ba 132 */
marcozecchini 0:9fca2b23d0ba 133 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
marcozecchini 0:9fca2b23d0ba 134 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 135 {
marcozecchini 0:9fca2b23d0ba 136 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 137 return( MBEDTLS_ERR_X509_INVALID_FORMAT );
marcozecchini 0:9fca2b23d0ba 138 }
marcozecchini 0:9fca2b23d0ba 139
marcozecchini 0:9fca2b23d0ba 140 if( len != (size_t) ( end - p ) )
marcozecchini 0:9fca2b23d0ba 141 {
marcozecchini 0:9fca2b23d0ba 142 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 143 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
marcozecchini 0:9fca2b23d0ba 144 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
marcozecchini 0:9fca2b23d0ba 145 }
marcozecchini 0:9fca2b23d0ba 146
marcozecchini 0:9fca2b23d0ba 147 /*
marcozecchini 0:9fca2b23d0ba 148 * CertificationRequestInfo ::= SEQUENCE {
marcozecchini 0:9fca2b23d0ba 149 */
marcozecchini 0:9fca2b23d0ba 150 csr->cri.p = p;
marcozecchini 0:9fca2b23d0ba 151
marcozecchini 0:9fca2b23d0ba 152 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
marcozecchini 0:9fca2b23d0ba 153 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 154 {
marcozecchini 0:9fca2b23d0ba 155 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 156 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
marcozecchini 0:9fca2b23d0ba 157 }
marcozecchini 0:9fca2b23d0ba 158
marcozecchini 0:9fca2b23d0ba 159 end = p + len;
marcozecchini 0:9fca2b23d0ba 160 csr->cri.len = end - csr->cri.p;
marcozecchini 0:9fca2b23d0ba 161
marcozecchini 0:9fca2b23d0ba 162 /*
marcozecchini 0:9fca2b23d0ba 163 * Version ::= INTEGER { v1(0) }
marcozecchini 0:9fca2b23d0ba 164 */
marcozecchini 0:9fca2b23d0ba 165 if( ( ret = x509_csr_get_version( &p, end, &csr->version ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 166 {
marcozecchini 0:9fca2b23d0ba 167 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 168 return( ret );
marcozecchini 0:9fca2b23d0ba 169 }
marcozecchini 0:9fca2b23d0ba 170
marcozecchini 0:9fca2b23d0ba 171 if( csr->version != 0 )
marcozecchini 0:9fca2b23d0ba 172 {
marcozecchini 0:9fca2b23d0ba 173 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 174 return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
marcozecchini 0:9fca2b23d0ba 175 }
marcozecchini 0:9fca2b23d0ba 176
marcozecchini 0:9fca2b23d0ba 177 csr->version++;
marcozecchini 0:9fca2b23d0ba 178
marcozecchini 0:9fca2b23d0ba 179 /*
marcozecchini 0:9fca2b23d0ba 180 * subject Name
marcozecchini 0:9fca2b23d0ba 181 */
marcozecchini 0:9fca2b23d0ba 182 csr->subject_raw.p = p;
marcozecchini 0:9fca2b23d0ba 183
marcozecchini 0:9fca2b23d0ba 184 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
marcozecchini 0:9fca2b23d0ba 185 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 186 {
marcozecchini 0:9fca2b23d0ba 187 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 188 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
marcozecchini 0:9fca2b23d0ba 189 }
marcozecchini 0:9fca2b23d0ba 190
marcozecchini 0:9fca2b23d0ba 191 if( ( ret = mbedtls_x509_get_name( &p, p + len, &csr->subject ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 192 {
marcozecchini 0:9fca2b23d0ba 193 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 194 return( ret );
marcozecchini 0:9fca2b23d0ba 195 }
marcozecchini 0:9fca2b23d0ba 196
marcozecchini 0:9fca2b23d0ba 197 csr->subject_raw.len = p - csr->subject_raw.p;
marcozecchini 0:9fca2b23d0ba 198
marcozecchini 0:9fca2b23d0ba 199 /*
marcozecchini 0:9fca2b23d0ba 200 * subjectPKInfo SubjectPublicKeyInfo
marcozecchini 0:9fca2b23d0ba 201 */
marcozecchini 0:9fca2b23d0ba 202 if( ( ret = mbedtls_pk_parse_subpubkey( &p, end, &csr->pk ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 203 {
marcozecchini 0:9fca2b23d0ba 204 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 205 return( ret );
marcozecchini 0:9fca2b23d0ba 206 }
marcozecchini 0:9fca2b23d0ba 207
marcozecchini 0:9fca2b23d0ba 208 /*
marcozecchini 0:9fca2b23d0ba 209 * attributes [0] Attributes
marcozecchini 0:9fca2b23d0ba 210 *
marcozecchini 0:9fca2b23d0ba 211 * The list of possible attributes is open-ended, though RFC 2985
marcozecchini 0:9fca2b23d0ba 212 * (PKCS#9) defines a few in section 5.4. We currently don't support any,
marcozecchini 0:9fca2b23d0ba 213 * so we just ignore them. This is a safe thing to do as the worst thing
marcozecchini 0:9fca2b23d0ba 214 * that could happen is that we issue a certificate that does not match
marcozecchini 0:9fca2b23d0ba 215 * the requester's expectations - this cannot cause a violation of our
marcozecchini 0:9fca2b23d0ba 216 * signature policies.
marcozecchini 0:9fca2b23d0ba 217 */
marcozecchini 0:9fca2b23d0ba 218 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
marcozecchini 0:9fca2b23d0ba 219 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 220 {
marcozecchini 0:9fca2b23d0ba 221 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 222 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
marcozecchini 0:9fca2b23d0ba 223 }
marcozecchini 0:9fca2b23d0ba 224
marcozecchini 0:9fca2b23d0ba 225 p += len;
marcozecchini 0:9fca2b23d0ba 226
marcozecchini 0:9fca2b23d0ba 227 end = csr->raw.p + csr->raw.len;
marcozecchini 0:9fca2b23d0ba 228
marcozecchini 0:9fca2b23d0ba 229 /*
marcozecchini 0:9fca2b23d0ba 230 * signatureAlgorithm AlgorithmIdentifier,
marcozecchini 0:9fca2b23d0ba 231 * signature BIT STRING
marcozecchini 0:9fca2b23d0ba 232 */
marcozecchini 0:9fca2b23d0ba 233 if( ( ret = mbedtls_x509_get_alg( &p, end, &csr->sig_oid, &sig_params ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 234 {
marcozecchini 0:9fca2b23d0ba 235 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 236 return( ret );
marcozecchini 0:9fca2b23d0ba 237 }
marcozecchini 0:9fca2b23d0ba 238
marcozecchini 0:9fca2b23d0ba 239 if( ( ret = mbedtls_x509_get_sig_alg( &csr->sig_oid, &sig_params,
marcozecchini 0:9fca2b23d0ba 240 &csr->sig_md, &csr->sig_pk,
marcozecchini 0:9fca2b23d0ba 241 &csr->sig_opts ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 242 {
marcozecchini 0:9fca2b23d0ba 243 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 244 return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG );
marcozecchini 0:9fca2b23d0ba 245 }
marcozecchini 0:9fca2b23d0ba 246
marcozecchini 0:9fca2b23d0ba 247 if( ( ret = mbedtls_x509_get_sig( &p, end, &csr->sig ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 248 {
marcozecchini 0:9fca2b23d0ba 249 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 250 return( ret );
marcozecchini 0:9fca2b23d0ba 251 }
marcozecchini 0:9fca2b23d0ba 252
marcozecchini 0:9fca2b23d0ba 253 if( p != end )
marcozecchini 0:9fca2b23d0ba 254 {
marcozecchini 0:9fca2b23d0ba 255 mbedtls_x509_csr_free( csr );
marcozecchini 0:9fca2b23d0ba 256 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
marcozecchini 0:9fca2b23d0ba 257 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
marcozecchini 0:9fca2b23d0ba 258 }
marcozecchini 0:9fca2b23d0ba 259
marcozecchini 0:9fca2b23d0ba 260 return( 0 );
marcozecchini 0:9fca2b23d0ba 261 }
marcozecchini 0:9fca2b23d0ba 262
marcozecchini 0:9fca2b23d0ba 263 /*
marcozecchini 0:9fca2b23d0ba 264 * Parse a CSR, allowing for PEM or raw DER encoding
marcozecchini 0:9fca2b23d0ba 265 */
marcozecchini 0:9fca2b23d0ba 266 int mbedtls_x509_csr_parse( mbedtls_x509_csr *csr, const unsigned char *buf, size_t buflen )
marcozecchini 0:9fca2b23d0ba 267 {
marcozecchini 0:9fca2b23d0ba 268 #if defined(MBEDTLS_PEM_PARSE_C)
marcozecchini 0:9fca2b23d0ba 269 int ret;
marcozecchini 0:9fca2b23d0ba 270 size_t use_len;
marcozecchini 0:9fca2b23d0ba 271 mbedtls_pem_context pem;
marcozecchini 0:9fca2b23d0ba 272 #endif
marcozecchini 0:9fca2b23d0ba 273
marcozecchini 0:9fca2b23d0ba 274 /*
marcozecchini 0:9fca2b23d0ba 275 * Check for valid input
marcozecchini 0:9fca2b23d0ba 276 */
marcozecchini 0:9fca2b23d0ba 277 if( csr == NULL || buf == NULL || buflen == 0 )
marcozecchini 0:9fca2b23d0ba 278 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 279
marcozecchini 0:9fca2b23d0ba 280 #if defined(MBEDTLS_PEM_PARSE_C)
marcozecchini 0:9fca2b23d0ba 281 mbedtls_pem_init( &pem );
marcozecchini 0:9fca2b23d0ba 282
marcozecchini 0:9fca2b23d0ba 283 /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
marcozecchini 0:9fca2b23d0ba 284 if( buf[buflen - 1] != '\0' )
marcozecchini 0:9fca2b23d0ba 285 ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
marcozecchini 0:9fca2b23d0ba 286 else
marcozecchini 0:9fca2b23d0ba 287 ret = mbedtls_pem_read_buffer( &pem,
marcozecchini 0:9fca2b23d0ba 288 "-----BEGIN CERTIFICATE REQUEST-----",
marcozecchini 0:9fca2b23d0ba 289 "-----END CERTIFICATE REQUEST-----",
marcozecchini 0:9fca2b23d0ba 290 buf, NULL, 0, &use_len );
marcozecchini 0:9fca2b23d0ba 291
marcozecchini 0:9fca2b23d0ba 292 if( ret == 0 )
marcozecchini 0:9fca2b23d0ba 293 {
marcozecchini 0:9fca2b23d0ba 294 /*
marcozecchini 0:9fca2b23d0ba 295 * Was PEM encoded, parse the result
marcozecchini 0:9fca2b23d0ba 296 */
marcozecchini 0:9fca2b23d0ba 297 if( ( ret = mbedtls_x509_csr_parse_der( csr, pem.buf, pem.buflen ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 298 return( ret );
marcozecchini 0:9fca2b23d0ba 299
marcozecchini 0:9fca2b23d0ba 300 mbedtls_pem_free( &pem );
marcozecchini 0:9fca2b23d0ba 301 return( 0 );
marcozecchini 0:9fca2b23d0ba 302 }
marcozecchini 0:9fca2b23d0ba 303 else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
marcozecchini 0:9fca2b23d0ba 304 {
marcozecchini 0:9fca2b23d0ba 305 mbedtls_pem_free( &pem );
marcozecchini 0:9fca2b23d0ba 306 return( ret );
marcozecchini 0:9fca2b23d0ba 307 }
marcozecchini 0:9fca2b23d0ba 308 else
marcozecchini 0:9fca2b23d0ba 309 #endif /* MBEDTLS_PEM_PARSE_C */
marcozecchini 0:9fca2b23d0ba 310 return( mbedtls_x509_csr_parse_der( csr, buf, buflen ) );
marcozecchini 0:9fca2b23d0ba 311 }
marcozecchini 0:9fca2b23d0ba 312
marcozecchini 0:9fca2b23d0ba 313 #if defined(MBEDTLS_FS_IO)
marcozecchini 0:9fca2b23d0ba 314 /*
marcozecchini 0:9fca2b23d0ba 315 * Load a CSR into the structure
marcozecchini 0:9fca2b23d0ba 316 */
marcozecchini 0:9fca2b23d0ba 317 int mbedtls_x509_csr_parse_file( mbedtls_x509_csr *csr, const char *path )
marcozecchini 0:9fca2b23d0ba 318 {
marcozecchini 0:9fca2b23d0ba 319 int ret;
marcozecchini 0:9fca2b23d0ba 320 size_t n;
marcozecchini 0:9fca2b23d0ba 321 unsigned char *buf;
marcozecchini 0:9fca2b23d0ba 322
marcozecchini 0:9fca2b23d0ba 323 if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 324 return( ret );
marcozecchini 0:9fca2b23d0ba 325
marcozecchini 0:9fca2b23d0ba 326 ret = mbedtls_x509_csr_parse( csr, buf, n );
marcozecchini 0:9fca2b23d0ba 327
marcozecchini 0:9fca2b23d0ba 328 mbedtls_zeroize( buf, n );
marcozecchini 0:9fca2b23d0ba 329 mbedtls_free( buf );
marcozecchini 0:9fca2b23d0ba 330
marcozecchini 0:9fca2b23d0ba 331 return( ret );
marcozecchini 0:9fca2b23d0ba 332 }
marcozecchini 0:9fca2b23d0ba 333 #endif /* MBEDTLS_FS_IO */
marcozecchini 0:9fca2b23d0ba 334
marcozecchini 0:9fca2b23d0ba 335 #define BEFORE_COLON 14
marcozecchini 0:9fca2b23d0ba 336 #define BC "14"
marcozecchini 0:9fca2b23d0ba 337 /*
marcozecchini 0:9fca2b23d0ba 338 * Return an informational string about the CSR.
marcozecchini 0:9fca2b23d0ba 339 */
marcozecchini 0:9fca2b23d0ba 340 int mbedtls_x509_csr_info( char *buf, size_t size, const char *prefix,
marcozecchini 0:9fca2b23d0ba 341 const mbedtls_x509_csr *csr )
marcozecchini 0:9fca2b23d0ba 342 {
marcozecchini 0:9fca2b23d0ba 343 int ret;
marcozecchini 0:9fca2b23d0ba 344 size_t n;
marcozecchini 0:9fca2b23d0ba 345 char *p;
marcozecchini 0:9fca2b23d0ba 346 char key_size_str[BEFORE_COLON];
marcozecchini 0:9fca2b23d0ba 347
marcozecchini 0:9fca2b23d0ba 348 p = buf;
marcozecchini 0:9fca2b23d0ba 349 n = size;
marcozecchini 0:9fca2b23d0ba 350
marcozecchini 0:9fca2b23d0ba 351 ret = mbedtls_snprintf( p, n, "%sCSR version : %d",
marcozecchini 0:9fca2b23d0ba 352 prefix, csr->version );
marcozecchini 0:9fca2b23d0ba 353 MBEDTLS_X509_SAFE_SNPRINTF;
marcozecchini 0:9fca2b23d0ba 354
marcozecchini 0:9fca2b23d0ba 355 ret = mbedtls_snprintf( p, n, "\n%ssubject name : ", prefix );
marcozecchini 0:9fca2b23d0ba 356 MBEDTLS_X509_SAFE_SNPRINTF;
marcozecchini 0:9fca2b23d0ba 357 ret = mbedtls_x509_dn_gets( p, n, &csr->subject );
marcozecchini 0:9fca2b23d0ba 358 MBEDTLS_X509_SAFE_SNPRINTF;
marcozecchini 0:9fca2b23d0ba 359
marcozecchini 0:9fca2b23d0ba 360 ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix );
marcozecchini 0:9fca2b23d0ba 361 MBEDTLS_X509_SAFE_SNPRINTF;
marcozecchini 0:9fca2b23d0ba 362
marcozecchini 0:9fca2b23d0ba 363 ret = mbedtls_x509_sig_alg_gets( p, n, &csr->sig_oid, csr->sig_pk, csr->sig_md,
marcozecchini 0:9fca2b23d0ba 364 csr->sig_opts );
marcozecchini 0:9fca2b23d0ba 365 MBEDTLS_X509_SAFE_SNPRINTF;
marcozecchini 0:9fca2b23d0ba 366
marcozecchini 0:9fca2b23d0ba 367 if( ( ret = mbedtls_x509_key_size_helper( key_size_str, BEFORE_COLON,
marcozecchini 0:9fca2b23d0ba 368 mbedtls_pk_get_name( &csr->pk ) ) ) != 0 )
marcozecchini 0:9fca2b23d0ba 369 {
marcozecchini 0:9fca2b23d0ba 370 return( ret );
marcozecchini 0:9fca2b23d0ba 371 }
marcozecchini 0:9fca2b23d0ba 372
marcozecchini 0:9fca2b23d0ba 373 ret = mbedtls_snprintf( p, n, "\n%s%-" BC "s: %d bits\n", prefix, key_size_str,
marcozecchini 0:9fca2b23d0ba 374 (int) mbedtls_pk_get_bitlen( &csr->pk ) );
marcozecchini 0:9fca2b23d0ba 375 MBEDTLS_X509_SAFE_SNPRINTF;
marcozecchini 0:9fca2b23d0ba 376
marcozecchini 0:9fca2b23d0ba 377 return( (int) ( size - n ) );
marcozecchini 0:9fca2b23d0ba 378 }
marcozecchini 0:9fca2b23d0ba 379
marcozecchini 0:9fca2b23d0ba 380 /*
marcozecchini 0:9fca2b23d0ba 381 * Initialize a CSR
marcozecchini 0:9fca2b23d0ba 382 */
marcozecchini 0:9fca2b23d0ba 383 void mbedtls_x509_csr_init( mbedtls_x509_csr *csr )
marcozecchini 0:9fca2b23d0ba 384 {
marcozecchini 0:9fca2b23d0ba 385 memset( csr, 0, sizeof(mbedtls_x509_csr) );
marcozecchini 0:9fca2b23d0ba 386 }
marcozecchini 0:9fca2b23d0ba 387
marcozecchini 0:9fca2b23d0ba 388 /*
marcozecchini 0:9fca2b23d0ba 389 * Unallocate all CSR data
marcozecchini 0:9fca2b23d0ba 390 */
marcozecchini 0:9fca2b23d0ba 391 void mbedtls_x509_csr_free( mbedtls_x509_csr *csr )
marcozecchini 0:9fca2b23d0ba 392 {
marcozecchini 0:9fca2b23d0ba 393 mbedtls_x509_name *name_cur;
marcozecchini 0:9fca2b23d0ba 394 mbedtls_x509_name *name_prv;
marcozecchini 0:9fca2b23d0ba 395
marcozecchini 0:9fca2b23d0ba 396 if( csr == NULL )
marcozecchini 0:9fca2b23d0ba 397 return;
marcozecchini 0:9fca2b23d0ba 398
marcozecchini 0:9fca2b23d0ba 399 mbedtls_pk_free( &csr->pk );
marcozecchini 0:9fca2b23d0ba 400
marcozecchini 0:9fca2b23d0ba 401 #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
marcozecchini 0:9fca2b23d0ba 402 mbedtls_free( csr->sig_opts );
marcozecchini 0:9fca2b23d0ba 403 #endif
marcozecchini 0:9fca2b23d0ba 404
marcozecchini 0:9fca2b23d0ba 405 name_cur = csr->subject.next;
marcozecchini 0:9fca2b23d0ba 406 while( name_cur != NULL )
marcozecchini 0:9fca2b23d0ba 407 {
marcozecchini 0:9fca2b23d0ba 408 name_prv = name_cur;
marcozecchini 0:9fca2b23d0ba 409 name_cur = name_cur->next;
marcozecchini 0:9fca2b23d0ba 410 mbedtls_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
marcozecchini 0:9fca2b23d0ba 411 mbedtls_free( name_prv );
marcozecchini 0:9fca2b23d0ba 412 }
marcozecchini 0:9fca2b23d0ba 413
marcozecchini 0:9fca2b23d0ba 414 if( csr->raw.p != NULL )
marcozecchini 0:9fca2b23d0ba 415 {
marcozecchini 0:9fca2b23d0ba 416 mbedtls_zeroize( csr->raw.p, csr->raw.len );
marcozecchini 0:9fca2b23d0ba 417 mbedtls_free( csr->raw.p );
marcozecchini 0:9fca2b23d0ba 418 }
marcozecchini 0:9fca2b23d0ba 419
marcozecchini 0:9fca2b23d0ba 420 mbedtls_zeroize( csr, sizeof( mbedtls_x509_csr ) );
marcozecchini 0:9fca2b23d0ba 421 }
marcozecchini 0:9fca2b23d0ba 422
marcozecchini 0:9fca2b23d0ba 423 #endif /* MBEDTLS_X509_CSR_PARSE_C */