Austin Blackstone / Mbed 2 deprecated client-lwip-lightswitch-demo-expanded

mbed client lightswitch demo

Dependencies:   mbed Socket lwip-eth lwip-sys lwip

Fork of mbed-client-classic-example-lwip by Austin Blackstone

mbedtls/source/x509_crt.c@11:cada08fc8a70, 2016-06-09 (annotated)

Committer:
mbedAustin
Date:
Thu Jun 09 17:08:36 2016 +0000
Revision:
11:cada08fc8a70
Commit for public Consumption

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbedAustin 11:cada08fc8a70 1 /*
mbedAustin 11:cada08fc8a70 2 * X.509 certificate parsing and verification
mbedAustin 11:cada08fc8a70 3 *
mbedAustin 11:cada08fc8a70 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
mbedAustin 11:cada08fc8a70 5 * SPDX-License-Identifier: Apache-2.0
mbedAustin 11:cada08fc8a70 6 *
mbedAustin 11:cada08fc8a70 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
mbedAustin 11:cada08fc8a70 8 * not use this file except in compliance with the License.
mbedAustin 11:cada08fc8a70 9 * You may obtain a copy of the License at
mbedAustin 11:cada08fc8a70 10 *
mbedAustin 11:cada08fc8a70 11 * http://www.apache.org/licenses/LICENSE-2.0
mbedAustin 11:cada08fc8a70 12 *
mbedAustin 11:cada08fc8a70 13 * Unless required by applicable law or agreed to in writing, software
mbedAustin 11:cada08fc8a70 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
mbedAustin 11:cada08fc8a70 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbedAustin 11:cada08fc8a70 16 * See the License for the specific language governing permissions and
mbedAustin 11:cada08fc8a70 17 * limitations under the License.
mbedAustin 11:cada08fc8a70 18 *
mbedAustin 11:cada08fc8a70 19 * This file is part of mbed TLS (https://tls.mbed.org)
mbedAustin 11:cada08fc8a70 20 */
mbedAustin 11:cada08fc8a70 21 /*
mbedAustin 11:cada08fc8a70 22 * The ITU-T X.509 standard defines a certificate format for PKI.
mbedAustin 11:cada08fc8a70 23 *
mbedAustin 11:cada08fc8a70 24 * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
mbedAustin 11:cada08fc8a70 25 * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
mbedAustin 11:cada08fc8a70 26 * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
mbedAustin 11:cada08fc8a70 27 *
mbedAustin 11:cada08fc8a70 28 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
mbedAustin 11:cada08fc8a70 29 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
mbedAustin 11:cada08fc8a70 30 */
mbedAustin 11:cada08fc8a70 31
mbedAustin 11:cada08fc8a70 32 #if !defined(MBEDTLS_CONFIG_FILE)
mbedAustin 11:cada08fc8a70 33 #include "mbedtls/config.h"
mbedAustin 11:cada08fc8a70 34 #else
mbedAustin 11:cada08fc8a70 35 #include MBEDTLS_CONFIG_FILE
mbedAustin 11:cada08fc8a70 36 #endif
mbedAustin 11:cada08fc8a70 37
mbedAustin 11:cada08fc8a70 38 #if defined(MBEDTLS_X509_CRT_PARSE_C)
mbedAustin 11:cada08fc8a70 39
mbedAustin 11:cada08fc8a70 40 #include "mbedtls/x509_crt.h"
mbedAustin 11:cada08fc8a70 41 #include "mbedtls/oid.h"
mbedAustin 11:cada08fc8a70 42
mbedAustin 11:cada08fc8a70 43 #include <stdio.h>
mbedAustin 11:cada08fc8a70 44 #include <string.h>
mbedAustin 11:cada08fc8a70 45
mbedAustin 11:cada08fc8a70 46 #if defined(MBEDTLS_PEM_PARSE_C)
mbedAustin 11:cada08fc8a70 47 #include "mbedtls/pem.h"
mbedAustin 11:cada08fc8a70 48 #endif
mbedAustin 11:cada08fc8a70 49
mbedAustin 11:cada08fc8a70 50 #if defined(MBEDTLS_PLATFORM_C)
mbedAustin 11:cada08fc8a70 51 #include "mbedtls/platform.h"
mbedAustin 11:cada08fc8a70 52 #else
mbedAustin 11:cada08fc8a70 53 #include <stdlib.h>
mbedAustin 11:cada08fc8a70 54 #define mbedtls_free free
mbedAustin 11:cada08fc8a70 55 #define mbedtls_calloc calloc
mbedAustin 11:cada08fc8a70 56 #define mbedtls_snprintf snprintf
mbedAustin 11:cada08fc8a70 57 #endif
mbedAustin 11:cada08fc8a70 58
mbedAustin 11:cada08fc8a70 59 #if defined(MBEDTLS_THREADING_C)
mbedAustin 11:cada08fc8a70 60 #include "mbedtls/threading.h"
mbedAustin 11:cada08fc8a70 61 #endif
mbedAustin 11:cada08fc8a70 62
mbedAustin 11:cada08fc8a70 63 #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
mbedAustin 11:cada08fc8a70 64 #include <windows.h>
mbedAustin 11:cada08fc8a70 65 #else
mbedAustin 11:cada08fc8a70 66 #include <time.h>
mbedAustin 11:cada08fc8a70 67 #endif
mbedAustin 11:cada08fc8a70 68
mbedAustin 11:cada08fc8a70 69 #if defined(MBEDTLS_FS_IO)
mbedAustin 11:cada08fc8a70 70 #include <stdio.h>
mbedAustin 11:cada08fc8a70 71 #if !defined(_WIN32) || defined(EFIX64) || defined(EFI32)
mbedAustin 11:cada08fc8a70 72 #include <sys/types.h>
mbedAustin 11:cada08fc8a70 73 #include <sys/stat.h>
mbedAustin 11:cada08fc8a70 74 #include <dirent.h>
mbedAustin 11:cada08fc8a70 75 #endif /* !_WIN32 || EFIX64 || EFI32 */
mbedAustin 11:cada08fc8a70 76 #endif
mbedAustin 11:cada08fc8a70 77
mbedAustin 11:cada08fc8a70 78 /* Implementation that should never be optimized out by the compiler */
mbedAustin 11:cada08fc8a70 79 static void mbedtls_zeroize( void *v, size_t n ) {
mbedAustin 11:cada08fc8a70 80 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
mbedAustin 11:cada08fc8a70 81 }
mbedAustin 11:cada08fc8a70 82
mbedAustin 11:cada08fc8a70 83 /*
mbedAustin 11:cada08fc8a70 84 * Default profile
mbedAustin 11:cada08fc8a70 85 */
mbedAustin 11:cada08fc8a70 86 const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_default =
mbedAustin 11:cada08fc8a70 87 {
mbedAustin 11:cada08fc8a70 88 /* Hashes from SHA-1 and above */
mbedAustin 11:cada08fc8a70 89 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA1 ) |
mbedAustin 11:cada08fc8a70 90 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_RIPEMD160 ) |
mbedAustin 11:cada08fc8a70 91 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA224 ) |
mbedAustin 11:cada08fc8a70 92 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) |
mbedAustin 11:cada08fc8a70 93 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ) |
mbedAustin 11:cada08fc8a70 94 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA512 ),
mbedAustin 11:cada08fc8a70 95 0xFFFFFFF, /* Any PK alg */
mbedAustin 11:cada08fc8a70 96 0xFFFFFFF, /* Any curve */
mbedAustin 11:cada08fc8a70 97 2048,
mbedAustin 11:cada08fc8a70 98 };
mbedAustin 11:cada08fc8a70 99
mbedAustin 11:cada08fc8a70 100 /*
mbedAustin 11:cada08fc8a70 101 * Next-default profile
mbedAustin 11:cada08fc8a70 102 */
mbedAustin 11:cada08fc8a70 103 const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_next =
mbedAustin 11:cada08fc8a70 104 {
mbedAustin 11:cada08fc8a70 105 /* Hashes from SHA-256 and above */
mbedAustin 11:cada08fc8a70 106 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) |
mbedAustin 11:cada08fc8a70 107 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ) |
mbedAustin 11:cada08fc8a70 108 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA512 ),
mbedAustin 11:cada08fc8a70 109 0xFFFFFFF, /* Any PK alg */
mbedAustin 11:cada08fc8a70 110 #if defined(MBEDTLS_ECP_C)
mbedAustin 11:cada08fc8a70 111 /* Curves at or above 128-bit security level */
mbedAustin 11:cada08fc8a70 112 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP256R1 ) |
mbedAustin 11:cada08fc8a70 113 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP384R1 ) |
mbedAustin 11:cada08fc8a70 114 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP521R1 ) |
mbedAustin 11:cada08fc8a70 115 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_BP256R1 ) |
mbedAustin 11:cada08fc8a70 116 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_BP384R1 ) |
mbedAustin 11:cada08fc8a70 117 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_BP512R1 ) |
mbedAustin 11:cada08fc8a70 118 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP256K1 ),
mbedAustin 11:cada08fc8a70 119 #else
mbedAustin 11:cada08fc8a70 120 0,
mbedAustin 11:cada08fc8a70 121 #endif
mbedAustin 11:cada08fc8a70 122 2048,
mbedAustin 11:cada08fc8a70 123 };
mbedAustin 11:cada08fc8a70 124
mbedAustin 11:cada08fc8a70 125 /*
mbedAustin 11:cada08fc8a70 126 * NSA Suite B Profile
mbedAustin 11:cada08fc8a70 127 */
mbedAustin 11:cada08fc8a70 128 const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_suiteb =
mbedAustin 11:cada08fc8a70 129 {
mbedAustin 11:cada08fc8a70 130 /* Only SHA-256 and 384 */
mbedAustin 11:cada08fc8a70 131 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) |
mbedAustin 11:cada08fc8a70 132 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ),
mbedAustin 11:cada08fc8a70 133 /* Only ECDSA */
mbedAustin 11:cada08fc8a70 134 MBEDTLS_X509_ID_FLAG( MBEDTLS_PK_ECDSA ),
mbedAustin 11:cada08fc8a70 135 #if defined(MBEDTLS_ECP_C)
mbedAustin 11:cada08fc8a70 136 /* Only NIST P-256 and P-384 */
mbedAustin 11:cada08fc8a70 137 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP256R1 ) |
mbedAustin 11:cada08fc8a70 138 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP384R1 ),
mbedAustin 11:cada08fc8a70 139 #else
mbedAustin 11:cada08fc8a70 140 0,
mbedAustin 11:cada08fc8a70 141 #endif
mbedAustin 11:cada08fc8a70 142 0,
mbedAustin 11:cada08fc8a70 143 };
mbedAustin 11:cada08fc8a70 144
mbedAustin 11:cada08fc8a70 145 /*
mbedAustin 11:cada08fc8a70 146 * Check md_alg against profile
mbedAustin 11:cada08fc8a70 147 * Return 0 if md_alg acceptable for this profile, -1 otherwise
mbedAustin 11:cada08fc8a70 148 */
mbedAustin 11:cada08fc8a70 149 static int x509_profile_check_md_alg( const mbedtls_x509_crt_profile *profile,
mbedAustin 11:cada08fc8a70 150 mbedtls_md_type_t md_alg )
mbedAustin 11:cada08fc8a70 151 {
mbedAustin 11:cada08fc8a70 152 if( ( profile->allowed_mds & MBEDTLS_X509_ID_FLAG( md_alg ) ) != 0 )
mbedAustin 11:cada08fc8a70 153 return( 0 );
mbedAustin 11:cada08fc8a70 154
mbedAustin 11:cada08fc8a70 155 return( -1 );
mbedAustin 11:cada08fc8a70 156 }
mbedAustin 11:cada08fc8a70 157
mbedAustin 11:cada08fc8a70 158 /*
mbedAustin 11:cada08fc8a70 159 * Check pk_alg against profile
mbedAustin 11:cada08fc8a70 160 * Return 0 if pk_alg acceptable for this profile, -1 otherwise
mbedAustin 11:cada08fc8a70 161 */
mbedAustin 11:cada08fc8a70 162 static int x509_profile_check_pk_alg( const mbedtls_x509_crt_profile *profile,
mbedAustin 11:cada08fc8a70 163 mbedtls_pk_type_t pk_alg )
mbedAustin 11:cada08fc8a70 164 {
mbedAustin 11:cada08fc8a70 165 if( ( profile->allowed_pks & MBEDTLS_X509_ID_FLAG( pk_alg ) ) != 0 )
mbedAustin 11:cada08fc8a70 166 return( 0 );
mbedAustin 11:cada08fc8a70 167
mbedAustin 11:cada08fc8a70 168 return( -1 );
mbedAustin 11:cada08fc8a70 169 }
mbedAustin 11:cada08fc8a70 170
mbedAustin 11:cada08fc8a70 171 /*
mbedAustin 11:cada08fc8a70 172 * Check key against profile
mbedAustin 11:cada08fc8a70 173 * Return 0 if pk_alg acceptable for this profile, -1 otherwise
mbedAustin 11:cada08fc8a70 174 */
mbedAustin 11:cada08fc8a70 175 static int x509_profile_check_key( const mbedtls_x509_crt_profile *profile,
mbedAustin 11:cada08fc8a70 176 mbedtls_pk_type_t pk_alg,
mbedAustin 11:cada08fc8a70 177 const mbedtls_pk_context *pk )
mbedAustin 11:cada08fc8a70 178 {
mbedAustin 11:cada08fc8a70 179 #if defined(MBEDTLS_RSA_C)
mbedAustin 11:cada08fc8a70 180 if( pk_alg == MBEDTLS_PK_RSA || pk_alg == MBEDTLS_PK_RSASSA_PSS )
mbedAustin 11:cada08fc8a70 181 {
mbedAustin 11:cada08fc8a70 182 if( mbedtls_pk_get_bitlen( pk ) >= profile->rsa_min_bitlen )
mbedAustin 11:cada08fc8a70 183 return( 0 );
mbedAustin 11:cada08fc8a70 184
mbedAustin 11:cada08fc8a70 185 return( -1 );
mbedAustin 11:cada08fc8a70 186 }
mbedAustin 11:cada08fc8a70 187 #endif
mbedAustin 11:cada08fc8a70 188
mbedAustin 11:cada08fc8a70 189 #if defined(MBEDTLS_ECP_C)
mbedAustin 11:cada08fc8a70 190 if( pk_alg == MBEDTLS_PK_ECDSA ||
mbedAustin 11:cada08fc8a70 191 pk_alg == MBEDTLS_PK_ECKEY ||
mbedAustin 11:cada08fc8a70 192 pk_alg == MBEDTLS_PK_ECKEY_DH )
mbedAustin 11:cada08fc8a70 193 {
mbedAustin 11:cada08fc8a70 194 mbedtls_ecp_group_id gid = mbedtls_pk_ec( *pk )->grp.id;
mbedAustin 11:cada08fc8a70 195
mbedAustin 11:cada08fc8a70 196 if( ( profile->allowed_curves & MBEDTLS_X509_ID_FLAG( gid ) ) != 0 )
mbedAustin 11:cada08fc8a70 197 return( 0 );
mbedAustin 11:cada08fc8a70 198
mbedAustin 11:cada08fc8a70 199 return( -1 );
mbedAustin 11:cada08fc8a70 200 }
mbedAustin 11:cada08fc8a70 201 #endif
mbedAustin 11:cada08fc8a70 202
mbedAustin 11:cada08fc8a70 203 return( -1 );
mbedAustin 11:cada08fc8a70 204 }
mbedAustin 11:cada08fc8a70 205
mbedAustin 11:cada08fc8a70 206 /*
mbedAustin 11:cada08fc8a70 207 * Version ::= INTEGER { v1(0), v2(1), v3(2) }
mbedAustin 11:cada08fc8a70 208 */
mbedAustin 11:cada08fc8a70 209 static int x509_get_version( unsigned char **p,
mbedAustin 11:cada08fc8a70 210 const unsigned char *end,
mbedAustin 11:cada08fc8a70 211 int *ver )
mbedAustin 11:cada08fc8a70 212 {
mbedAustin 11:cada08fc8a70 213 int ret;
mbedAustin 11:cada08fc8a70 214 size_t len;
mbedAustin 11:cada08fc8a70 215
mbedAustin 11:cada08fc8a70 216 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
mbedAustin 11:cada08fc8a70 217 MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0 ) ) != 0 )
mbedAustin 11:cada08fc8a70 218 {
mbedAustin 11:cada08fc8a70 219 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
mbedAustin 11:cada08fc8a70 220 {
mbedAustin 11:cada08fc8a70 221 *ver = 0;
mbedAustin 11:cada08fc8a70 222 return( 0 );
mbedAustin 11:cada08fc8a70 223 }
mbedAustin 11:cada08fc8a70 224
mbedAustin 11:cada08fc8a70 225 return( ret );
mbedAustin 11:cada08fc8a70 226 }
mbedAustin 11:cada08fc8a70 227
mbedAustin 11:cada08fc8a70 228 end = *p + len;
mbedAustin 11:cada08fc8a70 229
mbedAustin 11:cada08fc8a70 230 if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
mbedAustin 11:cada08fc8a70 231 return( MBEDTLS_ERR_X509_INVALID_VERSION + ret );
mbedAustin 11:cada08fc8a70 232
mbedAustin 11:cada08fc8a70 233 if( *p != end )
mbedAustin 11:cada08fc8a70 234 return( MBEDTLS_ERR_X509_INVALID_VERSION +
mbedAustin 11:cada08fc8a70 235 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
mbedAustin 11:cada08fc8a70 236
mbedAustin 11:cada08fc8a70 237 return( 0 );
mbedAustin 11:cada08fc8a70 238 }
mbedAustin 11:cada08fc8a70 239
mbedAustin 11:cada08fc8a70 240 /*
mbedAustin 11:cada08fc8a70 241 * Validity ::= SEQUENCE {
mbedAustin 11:cada08fc8a70 242 * notBefore Time,
mbedAustin 11:cada08fc8a70 243 * notAfter Time }
mbedAustin 11:cada08fc8a70 244 */
mbedAustin 11:cada08fc8a70 245 static int x509_get_dates( unsigned char **p,
mbedAustin 11:cada08fc8a70 246 const unsigned char *end,
mbedAustin 11:cada08fc8a70 247 mbedtls_x509_time *from,
mbedAustin 11:cada08fc8a70 248 mbedtls_x509_time *to )
mbedAustin 11:cada08fc8a70 249 {
mbedAustin 11:cada08fc8a70 250 int ret;
mbedAustin 11:cada08fc8a70 251 size_t len;
mbedAustin 11:cada08fc8a70 252
mbedAustin 11:cada08fc8a70 253 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
mbedAustin 11:cada08fc8a70 254 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
mbedAustin 11:cada08fc8a70 255 return( MBEDTLS_ERR_X509_INVALID_DATE + ret );
mbedAustin 11:cada08fc8a70 256
mbedAustin 11:cada08fc8a70 257 end = *p + len;
mbedAustin 11:cada08fc8a70 258
mbedAustin 11:cada08fc8a70 259 if( ( ret = mbedtls_x509_get_time( p, end, from ) ) != 0 )
mbedAustin 11:cada08fc8a70 260 return( ret );
mbedAustin 11:cada08fc8a70 261
mbedAustin 11:cada08fc8a70 262 if( ( ret = mbedtls_x509_get_time( p, end, to ) ) != 0 )
mbedAustin 11:cada08fc8a70 263 return( ret );
mbedAustin 11:cada08fc8a70 264
mbedAustin 11:cada08fc8a70 265 if( *p != end )
mbedAustin 11:cada08fc8a70 266 return( MBEDTLS_ERR_X509_INVALID_DATE +
mbedAustin 11:cada08fc8a70 267 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
mbedAustin 11:cada08fc8a70 268
mbedAustin 11:cada08fc8a70 269 return( 0 );
mbedAustin 11:cada08fc8a70 270 }
mbedAustin 11:cada08fc8a70 271
mbedAustin 11:cada08fc8a70 272 /*
mbedAustin 11:cada08fc8a70 273 * X.509 v2/v3 unique identifier (not parsed)
mbedAustin 11:cada08fc8a70 274 */
mbedAustin 11:cada08fc8a70 275 static int x509_get_uid( unsigned char **p,
mbedAustin 11:cada08fc8a70 276 const unsigned char *end,
mbedAustin 11:cada08fc8a70 277 mbedtls_x509_buf *uid, int n )
mbedAustin 11:cada08fc8a70 278 {
mbedAustin 11:cada08fc8a70 279 int ret;
mbedAustin 11:cada08fc8a70 280
mbedAustin 11:cada08fc8a70 281 if( *p == end )
mbedAustin 11:cada08fc8a70 282 return( 0 );
mbedAustin 11:cada08fc8a70 283
mbedAustin 11:cada08fc8a70 284 uid->tag = **p;
mbedAustin 11:cada08fc8a70 285
mbedAustin 11:cada08fc8a70 286 if( ( ret = mbedtls_asn1_get_tag( p, end, &uid->len,
mbedAustin 11:cada08fc8a70 287 MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | n ) ) != 0 )
mbedAustin 11:cada08fc8a70 288 {
mbedAustin 11:cada08fc8a70 289 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
mbedAustin 11:cada08fc8a70 290 return( 0 );
mbedAustin 11:cada08fc8a70 291
mbedAustin 11:cada08fc8a70 292 return( ret );
mbedAustin 11:cada08fc8a70 293 }
mbedAustin 11:cada08fc8a70 294
mbedAustin 11:cada08fc8a70 295 uid->p = *p;
mbedAustin 11:cada08fc8a70 296 *p += uid->len;
mbedAustin 11:cada08fc8a70 297
mbedAustin 11:cada08fc8a70 298 return( 0 );
mbedAustin 11:cada08fc8a70 299 }
mbedAustin 11:cada08fc8a70 300
mbedAustin 11:cada08fc8a70 301 static int x509_get_basic_constraints( unsigned char **p,
mbedAustin 11:cada08fc8a70 302 const unsigned char *end,
mbedAustin 11:cada08fc8a70 303 int *ca_istrue,
mbedAustin 11:cada08fc8a70 304 int *max_pathlen )
mbedAustin 11:cada08fc8a70 305 {
mbedAustin 11:cada08fc8a70 306 int ret;
mbedAustin 11:cada08fc8a70 307 size_t len;
mbedAustin 11:cada08fc8a70 308
mbedAustin 11:cada08fc8a70 309 /*
mbedAustin 11:cada08fc8a70 310 * BasicConstraints ::= SEQUENCE {
mbedAustin 11:cada08fc8a70 311 * cA BOOLEAN DEFAULT FALSE,
mbedAustin 11:cada08fc8a70 312 * pathLenConstraint INTEGER (0..MAX) OPTIONAL }
mbedAustin 11:cada08fc8a70 313 */
mbedAustin 11:cada08fc8a70 314 *ca_istrue = 0; /* DEFAULT FALSE */
mbedAustin 11:cada08fc8a70 315 *max_pathlen = 0; /* endless */
mbedAustin 11:cada08fc8a70 316
mbedAustin 11:cada08fc8a70 317 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
mbedAustin 11:cada08fc8a70 318 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
mbedAustin 11:cada08fc8a70 319 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
mbedAustin 11:cada08fc8a70 320
mbedAustin 11:cada08fc8a70 321 if( *p == end )
mbedAustin 11:cada08fc8a70 322 return( 0 );
mbedAustin 11:cada08fc8a70 323
mbedAustin 11:cada08fc8a70 324 if( ( ret = mbedtls_asn1_get_bool( p, end, ca_istrue ) ) != 0 )
mbedAustin 11:cada08fc8a70 325 {
mbedAustin 11:cada08fc8a70 326 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
mbedAustin 11:cada08fc8a70 327 ret = mbedtls_asn1_get_int( p, end, ca_istrue );
mbedAustin 11:cada08fc8a70 328
mbedAustin 11:cada08fc8a70 329 if( ret != 0 )
mbedAustin 11:cada08fc8a70 330 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
mbedAustin 11:cada08fc8a70 331
mbedAustin 11:cada08fc8a70 332 if( *ca_istrue != 0 )
mbedAustin 11:cada08fc8a70 333 *ca_istrue = 1;
mbedAustin 11:cada08fc8a70 334 }
mbedAustin 11:cada08fc8a70 335
mbedAustin 11:cada08fc8a70 336 if( *p == end )
mbedAustin 11:cada08fc8a70 337 return( 0 );
mbedAustin 11:cada08fc8a70 338
mbedAustin 11:cada08fc8a70 339 if( ( ret = mbedtls_asn1_get_int( p, end, max_pathlen ) ) != 0 )
mbedAustin 11:cada08fc8a70 340 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
mbedAustin 11:cada08fc8a70 341
mbedAustin 11:cada08fc8a70 342 if( *p != end )
mbedAustin 11:cada08fc8a70 343 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 344 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
mbedAustin 11:cada08fc8a70 345
mbedAustin 11:cada08fc8a70 346 (*max_pathlen)++;
mbedAustin 11:cada08fc8a70 347
mbedAustin 11:cada08fc8a70 348 return( 0 );
mbedAustin 11:cada08fc8a70 349 }
mbedAustin 11:cada08fc8a70 350
mbedAustin 11:cada08fc8a70 351 static int x509_get_ns_cert_type( unsigned char **p,
mbedAustin 11:cada08fc8a70 352 const unsigned char *end,
mbedAustin 11:cada08fc8a70 353 unsigned char *ns_cert_type)
mbedAustin 11:cada08fc8a70 354 {
mbedAustin 11:cada08fc8a70 355 int ret;
mbedAustin 11:cada08fc8a70 356 mbedtls_x509_bitstring bs = { 0, 0, NULL };
mbedAustin 11:cada08fc8a70 357
mbedAustin 11:cada08fc8a70 358 if( ( ret = mbedtls_asn1_get_bitstring( p, end, &bs ) ) != 0 )
mbedAustin 11:cada08fc8a70 359 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
mbedAustin 11:cada08fc8a70 360
mbedAustin 11:cada08fc8a70 361 if( bs.len != 1 )
mbedAustin 11:cada08fc8a70 362 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 363 MBEDTLS_ERR_ASN1_INVALID_LENGTH );
mbedAustin 11:cada08fc8a70 364
mbedAustin 11:cada08fc8a70 365 /* Get actual bitstring */
mbedAustin 11:cada08fc8a70 366 *ns_cert_type = *bs.p;
mbedAustin 11:cada08fc8a70 367 return( 0 );
mbedAustin 11:cada08fc8a70 368 }
mbedAustin 11:cada08fc8a70 369
mbedAustin 11:cada08fc8a70 370 static int x509_get_key_usage( unsigned char **p,
mbedAustin 11:cada08fc8a70 371 const unsigned char *end,
mbedAustin 11:cada08fc8a70 372 unsigned int *key_usage)
mbedAustin 11:cada08fc8a70 373 {
mbedAustin 11:cada08fc8a70 374 int ret;
mbedAustin 11:cada08fc8a70 375 size_t i;
mbedAustin 11:cada08fc8a70 376 mbedtls_x509_bitstring bs = { 0, 0, NULL };
mbedAustin 11:cada08fc8a70 377
mbedAustin 11:cada08fc8a70 378 if( ( ret = mbedtls_asn1_get_bitstring( p, end, &bs ) ) != 0 )
mbedAustin 11:cada08fc8a70 379 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
mbedAustin 11:cada08fc8a70 380
mbedAustin 11:cada08fc8a70 381 if( bs.len < 1 )
mbedAustin 11:cada08fc8a70 382 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 383 MBEDTLS_ERR_ASN1_INVALID_LENGTH );
mbedAustin 11:cada08fc8a70 384
mbedAustin 11:cada08fc8a70 385 /* Get actual bitstring */
mbedAustin 11:cada08fc8a70 386 *key_usage = 0;
mbedAustin 11:cada08fc8a70 387 for( i = 0; i < bs.len && i < sizeof( unsigned int ); i++ )
mbedAustin 11:cada08fc8a70 388 {
mbedAustin 11:cada08fc8a70 389 *key_usage |= (unsigned int) bs.p[i] << (8*i);
mbedAustin 11:cada08fc8a70 390 }
mbedAustin 11:cada08fc8a70 391
mbedAustin 11:cada08fc8a70 392 return( 0 );
mbedAustin 11:cada08fc8a70 393 }
mbedAustin 11:cada08fc8a70 394
mbedAustin 11:cada08fc8a70 395 /*
mbedAustin 11:cada08fc8a70 396 * ExtKeyUsageSyntax ::= SEQUENCE SIZE (1..MAX) OF KeyPurposeId
mbedAustin 11:cada08fc8a70 397 *
mbedAustin 11:cada08fc8a70 398 * KeyPurposeId ::= OBJECT IDENTIFIER
mbedAustin 11:cada08fc8a70 399 */
mbedAustin 11:cada08fc8a70 400 static int x509_get_ext_key_usage( unsigned char **p,
mbedAustin 11:cada08fc8a70 401 const unsigned char *end,
mbedAustin 11:cada08fc8a70 402 mbedtls_x509_sequence *ext_key_usage)
mbedAustin 11:cada08fc8a70 403 {
mbedAustin 11:cada08fc8a70 404 int ret;
mbedAustin 11:cada08fc8a70 405
mbedAustin 11:cada08fc8a70 406 if( ( ret = mbedtls_asn1_get_sequence_of( p, end, ext_key_usage, MBEDTLS_ASN1_OID ) ) != 0 )
mbedAustin 11:cada08fc8a70 407 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
mbedAustin 11:cada08fc8a70 408
mbedAustin 11:cada08fc8a70 409 /* Sequence length must be >= 1 */
mbedAustin 11:cada08fc8a70 410 if( ext_key_usage->buf.p == NULL )
mbedAustin 11:cada08fc8a70 411 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 412 MBEDTLS_ERR_ASN1_INVALID_LENGTH );
mbedAustin 11:cada08fc8a70 413
mbedAustin 11:cada08fc8a70 414 return( 0 );
mbedAustin 11:cada08fc8a70 415 }
mbedAustin 11:cada08fc8a70 416
mbedAustin 11:cada08fc8a70 417 /*
mbedAustin 11:cada08fc8a70 418 * SubjectAltName ::= GeneralNames
mbedAustin 11:cada08fc8a70 419 *
mbedAustin 11:cada08fc8a70 420 * GeneralNames ::= SEQUENCE SIZE (1..MAX) OF GeneralName
mbedAustin 11:cada08fc8a70 421 *
mbedAustin 11:cada08fc8a70 422 * GeneralName ::= CHOICE {
mbedAustin 11:cada08fc8a70 423 * otherName [0] OtherName,
mbedAustin 11:cada08fc8a70 424 * rfc822Name [1] IA5String,
mbedAustin 11:cada08fc8a70 425 * dNSName [2] IA5String,
mbedAustin 11:cada08fc8a70 426 * x400Address [3] ORAddress,
mbedAustin 11:cada08fc8a70 427 * directoryName [4] Name,
mbedAustin 11:cada08fc8a70 428 * ediPartyName [5] EDIPartyName,
mbedAustin 11:cada08fc8a70 429 * uniformResourceIdentifier [6] IA5String,
mbedAustin 11:cada08fc8a70 430 * iPAddress [7] OCTET STRING,
mbedAustin 11:cada08fc8a70 431 * registeredID [8] OBJECT IDENTIFIER }
mbedAustin 11:cada08fc8a70 432 *
mbedAustin 11:cada08fc8a70 433 * OtherName ::= SEQUENCE {
mbedAustin 11:cada08fc8a70 434 * type-id OBJECT IDENTIFIER,
mbedAustin 11:cada08fc8a70 435 * value [0] EXPLICIT ANY DEFINED BY type-id }
mbedAustin 11:cada08fc8a70 436 *
mbedAustin 11:cada08fc8a70 437 * EDIPartyName ::= SEQUENCE {
mbedAustin 11:cada08fc8a70 438 * nameAssigner [0] DirectoryString OPTIONAL,
mbedAustin 11:cada08fc8a70 439 * partyName [1] DirectoryString }
mbedAustin 11:cada08fc8a70 440 *
mbedAustin 11:cada08fc8a70 441 * NOTE: we only parse and use dNSName at this point.
mbedAustin 11:cada08fc8a70 442 */
mbedAustin 11:cada08fc8a70 443 static int x509_get_subject_alt_name( unsigned char **p,
mbedAustin 11:cada08fc8a70 444 const unsigned char *end,
mbedAustin 11:cada08fc8a70 445 mbedtls_x509_sequence *subject_alt_name )
mbedAustin 11:cada08fc8a70 446 {
mbedAustin 11:cada08fc8a70 447 int ret;
mbedAustin 11:cada08fc8a70 448 size_t len, tag_len;
mbedAustin 11:cada08fc8a70 449 mbedtls_asn1_buf *buf;
mbedAustin 11:cada08fc8a70 450 unsigned char tag;
mbedAustin 11:cada08fc8a70 451 mbedtls_asn1_sequence *cur = subject_alt_name;
mbedAustin 11:cada08fc8a70 452
mbedAustin 11:cada08fc8a70 453 /* Get main sequence tag */
mbedAustin 11:cada08fc8a70 454 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
mbedAustin 11:cada08fc8a70 455 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
mbedAustin 11:cada08fc8a70 456 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
mbedAustin 11:cada08fc8a70 457
mbedAustin 11:cada08fc8a70 458 if( *p + len != end )
mbedAustin 11:cada08fc8a70 459 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 460 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
mbedAustin 11:cada08fc8a70 461
mbedAustin 11:cada08fc8a70 462 while( *p < end )
mbedAustin 11:cada08fc8a70 463 {
mbedAustin 11:cada08fc8a70 464 if( ( end - *p ) < 1 )
mbedAustin 11:cada08fc8a70 465 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 466 MBEDTLS_ERR_ASN1_OUT_OF_DATA );
mbedAustin 11:cada08fc8a70 467
mbedAustin 11:cada08fc8a70 468 tag = **p;
mbedAustin 11:cada08fc8a70 469 (*p)++;
mbedAustin 11:cada08fc8a70 470 if( ( ret = mbedtls_asn1_get_len( p, end, &tag_len ) ) != 0 )
mbedAustin 11:cada08fc8a70 471 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
mbedAustin 11:cada08fc8a70 472
mbedAustin 11:cada08fc8a70 473 if( ( tag & MBEDTLS_ASN1_CONTEXT_SPECIFIC ) != MBEDTLS_ASN1_CONTEXT_SPECIFIC )
mbedAustin 11:cada08fc8a70 474 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 475 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
mbedAustin 11:cada08fc8a70 476
mbedAustin 11:cada08fc8a70 477 /* Skip everything but DNS name */
mbedAustin 11:cada08fc8a70 478 if( tag != ( MBEDTLS_ASN1_CONTEXT_SPECIFIC | 2 ) )
mbedAustin 11:cada08fc8a70 479 {
mbedAustin 11:cada08fc8a70 480 *p += tag_len;
mbedAustin 11:cada08fc8a70 481 continue;
mbedAustin 11:cada08fc8a70 482 }
mbedAustin 11:cada08fc8a70 483
mbedAustin 11:cada08fc8a70 484 /* Allocate and assign next pointer */
mbedAustin 11:cada08fc8a70 485 if( cur->buf.p != NULL )
mbedAustin 11:cada08fc8a70 486 {
mbedAustin 11:cada08fc8a70 487 if( cur->next != NULL )
mbedAustin 11:cada08fc8a70 488 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS );
mbedAustin 11:cada08fc8a70 489
mbedAustin 11:cada08fc8a70 490 cur->next = mbedtls_calloc( 1, sizeof( mbedtls_asn1_sequence ) );
mbedAustin 11:cada08fc8a70 491
mbedAustin 11:cada08fc8a70 492 if( cur->next == NULL )
mbedAustin 11:cada08fc8a70 493 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 494 MBEDTLS_ERR_ASN1_ALLOC_FAILED );
mbedAustin 11:cada08fc8a70 495
mbedAustin 11:cada08fc8a70 496 cur = cur->next;
mbedAustin 11:cada08fc8a70 497 }
mbedAustin 11:cada08fc8a70 498
mbedAustin 11:cada08fc8a70 499 buf = &(cur->buf);
mbedAustin 11:cada08fc8a70 500 buf->tag = tag;
mbedAustin 11:cada08fc8a70 501 buf->p = *p;
mbedAustin 11:cada08fc8a70 502 buf->len = tag_len;
mbedAustin 11:cada08fc8a70 503 *p += buf->len;
mbedAustin 11:cada08fc8a70 504 }
mbedAustin 11:cada08fc8a70 505
mbedAustin 11:cada08fc8a70 506 /* Set final sequence entry's next pointer to NULL */
mbedAustin 11:cada08fc8a70 507 cur->next = NULL;
mbedAustin 11:cada08fc8a70 508
mbedAustin 11:cada08fc8a70 509 if( *p != end )
mbedAustin 11:cada08fc8a70 510 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 511 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
mbedAustin 11:cada08fc8a70 512
mbedAustin 11:cada08fc8a70 513 return( 0 );
mbedAustin 11:cada08fc8a70 514 }
mbedAustin 11:cada08fc8a70 515
mbedAustin 11:cada08fc8a70 516 /*
mbedAustin 11:cada08fc8a70 517 * X.509 v3 extensions
mbedAustin 11:cada08fc8a70 518 *
mbedAustin 11:cada08fc8a70 519 * TODO: Perform all of the basic constraints tests required by the RFC
mbedAustin 11:cada08fc8a70 520 * TODO: Set values for undetected extensions to a sane default?
mbedAustin 11:cada08fc8a70 521 *
mbedAustin 11:cada08fc8a70 522 */
mbedAustin 11:cada08fc8a70 523 static int x509_get_crt_ext( unsigned char **p,
mbedAustin 11:cada08fc8a70 524 const unsigned char *end,
mbedAustin 11:cada08fc8a70 525 mbedtls_x509_crt *crt )
mbedAustin 11:cada08fc8a70 526 {
mbedAustin 11:cada08fc8a70 527 int ret;
mbedAustin 11:cada08fc8a70 528 size_t len;
mbedAustin 11:cada08fc8a70 529 unsigned char *end_ext_data, *end_ext_octet;
mbedAustin 11:cada08fc8a70 530
mbedAustin 11:cada08fc8a70 531 if( ( ret = mbedtls_x509_get_ext( p, end, &crt->v3_ext, 3 ) ) != 0 )
mbedAustin 11:cada08fc8a70 532 {
mbedAustin 11:cada08fc8a70 533 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
mbedAustin 11:cada08fc8a70 534 return( 0 );
mbedAustin 11:cada08fc8a70 535
mbedAustin 11:cada08fc8a70 536 return( ret );
mbedAustin 11:cada08fc8a70 537 }
mbedAustin 11:cada08fc8a70 538
mbedAustin 11:cada08fc8a70 539 while( *p < end )
mbedAustin 11:cada08fc8a70 540 {
mbedAustin 11:cada08fc8a70 541 /*
mbedAustin 11:cada08fc8a70 542 * Extension ::= SEQUENCE {
mbedAustin 11:cada08fc8a70 543 * extnID OBJECT IDENTIFIER,
mbedAustin 11:cada08fc8a70 544 * critical BOOLEAN DEFAULT FALSE,
mbedAustin 11:cada08fc8a70 545 * extnValue OCTET STRING }
mbedAustin 11:cada08fc8a70 546 */
mbedAustin 11:cada08fc8a70 547 mbedtls_x509_buf extn_oid = {0, 0, NULL};
mbedAustin 11:cada08fc8a70 548 int is_critical = 0; /* DEFAULT FALSE */
mbedAustin 11:cada08fc8a70 549 int ext_type = 0;
mbedAustin 11:cada08fc8a70 550
mbedAustin 11:cada08fc8a70 551 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
mbedAustin 11:cada08fc8a70 552 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
mbedAustin 11:cada08fc8a70 553 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
mbedAustin 11:cada08fc8a70 554
mbedAustin 11:cada08fc8a70 555 end_ext_data = *p + len;
mbedAustin 11:cada08fc8a70 556
mbedAustin 11:cada08fc8a70 557 /* Get extension ID */
mbedAustin 11:cada08fc8a70 558 extn_oid.tag = **p;
mbedAustin 11:cada08fc8a70 559
mbedAustin 11:cada08fc8a70 560 if( ( ret = mbedtls_asn1_get_tag( p, end, &extn_oid.len, MBEDTLS_ASN1_OID ) ) != 0 )
mbedAustin 11:cada08fc8a70 561 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
mbedAustin 11:cada08fc8a70 562
mbedAustin 11:cada08fc8a70 563 extn_oid.p = *p;
mbedAustin 11:cada08fc8a70 564 *p += extn_oid.len;
mbedAustin 11:cada08fc8a70 565
mbedAustin 11:cada08fc8a70 566 if( ( end - *p ) < 1 )
mbedAustin 11:cada08fc8a70 567 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 568 MBEDTLS_ERR_ASN1_OUT_OF_DATA );
mbedAustin 11:cada08fc8a70 569
mbedAustin 11:cada08fc8a70 570 /* Get optional critical */
mbedAustin 11:cada08fc8a70 571 if( ( ret = mbedtls_asn1_get_bool( p, end_ext_data, &is_critical ) ) != 0 &&
mbedAustin 11:cada08fc8a70 572 ( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) )
mbedAustin 11:cada08fc8a70 573 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
mbedAustin 11:cada08fc8a70 574
mbedAustin 11:cada08fc8a70 575 /* Data should be octet string type */
mbedAustin 11:cada08fc8a70 576 if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len,
mbedAustin 11:cada08fc8a70 577 MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
mbedAustin 11:cada08fc8a70 578 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
mbedAustin 11:cada08fc8a70 579
mbedAustin 11:cada08fc8a70 580 end_ext_octet = *p + len;
mbedAustin 11:cada08fc8a70 581
mbedAustin 11:cada08fc8a70 582 if( end_ext_octet != end_ext_data )
mbedAustin 11:cada08fc8a70 583 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 584 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
mbedAustin 11:cada08fc8a70 585
mbedAustin 11:cada08fc8a70 586 /*
mbedAustin 11:cada08fc8a70 587 * Detect supported extensions
mbedAustin 11:cada08fc8a70 588 */
mbedAustin 11:cada08fc8a70 589 ret = mbedtls_oid_get_x509_ext_type( &extn_oid, &ext_type );
mbedAustin 11:cada08fc8a70 590
mbedAustin 11:cada08fc8a70 591 if( ret != 0 )
mbedAustin 11:cada08fc8a70 592 {
mbedAustin 11:cada08fc8a70 593 /* No parser found, skip extension */
mbedAustin 11:cada08fc8a70 594 *p = end_ext_octet;
mbedAustin 11:cada08fc8a70 595
mbedAustin 11:cada08fc8a70 596 #if !defined(MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION)
mbedAustin 11:cada08fc8a70 597 if( is_critical )
mbedAustin 11:cada08fc8a70 598 {
mbedAustin 11:cada08fc8a70 599 /* Data is marked as critical: fail */
mbedAustin 11:cada08fc8a70 600 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 601 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
mbedAustin 11:cada08fc8a70 602 }
mbedAustin 11:cada08fc8a70 603 #endif
mbedAustin 11:cada08fc8a70 604 continue;
mbedAustin 11:cada08fc8a70 605 }
mbedAustin 11:cada08fc8a70 606
mbedAustin 11:cada08fc8a70 607 /* Forbid repeated extensions */
mbedAustin 11:cada08fc8a70 608 if( ( crt->ext_types & ext_type ) != 0 )
mbedAustin 11:cada08fc8a70 609 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS );
mbedAustin 11:cada08fc8a70 610
mbedAustin 11:cada08fc8a70 611 crt->ext_types |= ext_type;
mbedAustin 11:cada08fc8a70 612
mbedAustin 11:cada08fc8a70 613 switch( ext_type )
mbedAustin 11:cada08fc8a70 614 {
mbedAustin 11:cada08fc8a70 615 case MBEDTLS_X509_EXT_BASIC_CONSTRAINTS:
mbedAustin 11:cada08fc8a70 616 /* Parse basic constraints */
mbedAustin 11:cada08fc8a70 617 if( ( ret = x509_get_basic_constraints( p, end_ext_octet,
mbedAustin 11:cada08fc8a70 618 &crt->ca_istrue, &crt->max_pathlen ) ) != 0 )
mbedAustin 11:cada08fc8a70 619 return( ret );
mbedAustin 11:cada08fc8a70 620 break;
mbedAustin 11:cada08fc8a70 621
mbedAustin 11:cada08fc8a70 622 case MBEDTLS_X509_EXT_KEY_USAGE:
mbedAustin 11:cada08fc8a70 623 /* Parse key usage */
mbedAustin 11:cada08fc8a70 624 if( ( ret = x509_get_key_usage( p, end_ext_octet,
mbedAustin 11:cada08fc8a70 625 &crt->key_usage ) ) != 0 )
mbedAustin 11:cada08fc8a70 626 return( ret );
mbedAustin 11:cada08fc8a70 627 break;
mbedAustin 11:cada08fc8a70 628
mbedAustin 11:cada08fc8a70 629 case MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE:
mbedAustin 11:cada08fc8a70 630 /* Parse extended key usage */
mbedAustin 11:cada08fc8a70 631 if( ( ret = x509_get_ext_key_usage( p, end_ext_octet,
mbedAustin 11:cada08fc8a70 632 &crt->ext_key_usage ) ) != 0 )
mbedAustin 11:cada08fc8a70 633 return( ret );
mbedAustin 11:cada08fc8a70 634 break;
mbedAustin 11:cada08fc8a70 635
mbedAustin 11:cada08fc8a70 636 case MBEDTLS_X509_EXT_SUBJECT_ALT_NAME:
mbedAustin 11:cada08fc8a70 637 /* Parse subject alt name */
mbedAustin 11:cada08fc8a70 638 if( ( ret = x509_get_subject_alt_name( p, end_ext_octet,
mbedAustin 11:cada08fc8a70 639 &crt->subject_alt_names ) ) != 0 )
mbedAustin 11:cada08fc8a70 640 return( ret );
mbedAustin 11:cada08fc8a70 641 break;
mbedAustin 11:cada08fc8a70 642
mbedAustin 11:cada08fc8a70 643 case MBEDTLS_X509_EXT_NS_CERT_TYPE:
mbedAustin 11:cada08fc8a70 644 /* Parse netscape certificate type */
mbedAustin 11:cada08fc8a70 645 if( ( ret = x509_get_ns_cert_type( p, end_ext_octet,
mbedAustin 11:cada08fc8a70 646 &crt->ns_cert_type ) ) != 0 )
mbedAustin 11:cada08fc8a70 647 return( ret );
mbedAustin 11:cada08fc8a70 648 break;
mbedAustin 11:cada08fc8a70 649
mbedAustin 11:cada08fc8a70 650 default:
mbedAustin 11:cada08fc8a70 651 return( MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE );
mbedAustin 11:cada08fc8a70 652 }
mbedAustin 11:cada08fc8a70 653 }
mbedAustin 11:cada08fc8a70 654
mbedAustin 11:cada08fc8a70 655 if( *p != end )
mbedAustin 11:cada08fc8a70 656 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
mbedAustin 11:cada08fc8a70 657 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
mbedAustin 11:cada08fc8a70 658
mbedAustin 11:cada08fc8a70 659 return( 0 );
mbedAustin 11:cada08fc8a70 660 }
mbedAustin 11:cada08fc8a70 661
mbedAustin 11:cada08fc8a70 662 /*
mbedAustin 11:cada08fc8a70 663 * Parse and fill a single X.509 certificate in DER format
mbedAustin 11:cada08fc8a70 664 */
mbedAustin 11:cada08fc8a70 665 static int x509_crt_parse_der_core( mbedtls_x509_crt *crt, const unsigned char *buf,
mbedAustin 11:cada08fc8a70 666 size_t buflen )
mbedAustin 11:cada08fc8a70 667 {
mbedAustin 11:cada08fc8a70 668 int ret;
mbedAustin 11:cada08fc8a70 669 size_t len;
mbedAustin 11:cada08fc8a70 670 unsigned char *p, *end, *crt_end;
mbedAustin 11:cada08fc8a70 671 mbedtls_x509_buf sig_params1, sig_params2, sig_oid2;
mbedAustin 11:cada08fc8a70 672
mbedAustin 11:cada08fc8a70 673 memset( &sig_params1, 0, sizeof( mbedtls_x509_buf ) );
mbedAustin 11:cada08fc8a70 674 memset( &sig_params2, 0, sizeof( mbedtls_x509_buf ) );
mbedAustin 11:cada08fc8a70 675 memset( &sig_oid2, 0, sizeof( mbedtls_x509_buf ) );
mbedAustin 11:cada08fc8a70 676
mbedAustin 11:cada08fc8a70 677 /*
mbedAustin 11:cada08fc8a70 678 * Check for valid input
mbedAustin 11:cada08fc8a70 679 */
mbedAustin 11:cada08fc8a70 680 if( crt == NULL || buf == NULL )
mbedAustin 11:cada08fc8a70 681 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
mbedAustin 11:cada08fc8a70 682
mbedAustin 11:cada08fc8a70 683 p = mbedtls_calloc( 1, len = buflen );
mbedAustin 11:cada08fc8a70 684 if( p == NULL )
mbedAustin 11:cada08fc8a70 685 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
mbedAustin 11:cada08fc8a70 686
mbedAustin 11:cada08fc8a70 687 memcpy( p, buf, buflen );
mbedAustin 11:cada08fc8a70 688
mbedAustin 11:cada08fc8a70 689 crt->raw.p = p;
mbedAustin 11:cada08fc8a70 690 crt->raw.len = len;
mbedAustin 11:cada08fc8a70 691 end = p + len;
mbedAustin 11:cada08fc8a70 692
mbedAustin 11:cada08fc8a70 693 /*
mbedAustin 11:cada08fc8a70 694 * Certificate ::= SEQUENCE {
mbedAustin 11:cada08fc8a70 695 * tbsCertificate TBSCertificate,
mbedAustin 11:cada08fc8a70 696 * signatureAlgorithm AlgorithmIdentifier,
mbedAustin 11:cada08fc8a70 697 * signatureValue BIT STRING }
mbedAustin 11:cada08fc8a70 698 */
mbedAustin 11:cada08fc8a70 699 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
mbedAustin 11:cada08fc8a70 700 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
mbedAustin 11:cada08fc8a70 701 {
mbedAustin 11:cada08fc8a70 702 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 703 return( MBEDTLS_ERR_X509_INVALID_FORMAT );
mbedAustin 11:cada08fc8a70 704 }
mbedAustin 11:cada08fc8a70 705
mbedAustin 11:cada08fc8a70 706 if( len > (size_t) ( end - p ) )
mbedAustin 11:cada08fc8a70 707 {
mbedAustin 11:cada08fc8a70 708 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 709 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
mbedAustin 11:cada08fc8a70 710 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
mbedAustin 11:cada08fc8a70 711 }
mbedAustin 11:cada08fc8a70 712 crt_end = p + len;
mbedAustin 11:cada08fc8a70 713
mbedAustin 11:cada08fc8a70 714 /*
mbedAustin 11:cada08fc8a70 715 * TBSCertificate ::= SEQUENCE {
mbedAustin 11:cada08fc8a70 716 */
mbedAustin 11:cada08fc8a70 717 crt->tbs.p = p;
mbedAustin 11:cada08fc8a70 718
mbedAustin 11:cada08fc8a70 719 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
mbedAustin 11:cada08fc8a70 720 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
mbedAustin 11:cada08fc8a70 721 {
mbedAustin 11:cada08fc8a70 722 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 723 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
mbedAustin 11:cada08fc8a70 724 }
mbedAustin 11:cada08fc8a70 725
mbedAustin 11:cada08fc8a70 726 end = p + len;
mbedAustin 11:cada08fc8a70 727 crt->tbs.len = end - crt->tbs.p;
mbedAustin 11:cada08fc8a70 728
mbedAustin 11:cada08fc8a70 729 /*
mbedAustin 11:cada08fc8a70 730 * Version ::= INTEGER { v1(0), v2(1), v3(2) }
mbedAustin 11:cada08fc8a70 731 *
mbedAustin 11:cada08fc8a70 732 * CertificateSerialNumber ::= INTEGER
mbedAustin 11:cada08fc8a70 733 *
mbedAustin 11:cada08fc8a70 734 * signature AlgorithmIdentifier
mbedAustin 11:cada08fc8a70 735 */
mbedAustin 11:cada08fc8a70 736 if( ( ret = x509_get_version( &p, end, &crt->version ) ) != 0 ||
mbedAustin 11:cada08fc8a70 737 ( ret = mbedtls_x509_get_serial( &p, end, &crt->serial ) ) != 0 ||
mbedAustin 11:cada08fc8a70 738 ( ret = mbedtls_x509_get_alg( &p, end, &crt->sig_oid,
mbedAustin 11:cada08fc8a70 739 &sig_params1 ) ) != 0 )
mbedAustin 11:cada08fc8a70 740 {
mbedAustin 11:cada08fc8a70 741 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 742 return( ret );
mbedAustin 11:cada08fc8a70 743 }
mbedAustin 11:cada08fc8a70 744
mbedAustin 11:cada08fc8a70 745 crt->version++;
mbedAustin 11:cada08fc8a70 746
mbedAustin 11:cada08fc8a70 747 if( crt->version > 3 )
mbedAustin 11:cada08fc8a70 748 {
mbedAustin 11:cada08fc8a70 749 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 750 return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
mbedAustin 11:cada08fc8a70 751 }
mbedAustin 11:cada08fc8a70 752
mbedAustin 11:cada08fc8a70 753 if( ( ret = mbedtls_x509_get_sig_alg( &crt->sig_oid, &sig_params1,
mbedAustin 11:cada08fc8a70 754 &crt->sig_md, &crt->sig_pk,
mbedAustin 11:cada08fc8a70 755 &crt->sig_opts ) ) != 0 )
mbedAustin 11:cada08fc8a70 756 {
mbedAustin 11:cada08fc8a70 757 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 758 return( ret );
mbedAustin 11:cada08fc8a70 759 }
mbedAustin 11:cada08fc8a70 760
mbedAustin 11:cada08fc8a70 761 /*
mbedAustin 11:cada08fc8a70 762 * issuer Name
mbedAustin 11:cada08fc8a70 763 */
mbedAustin 11:cada08fc8a70 764 crt->issuer_raw.p = p;
mbedAustin 11:cada08fc8a70 765
mbedAustin 11:cada08fc8a70 766 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
mbedAustin 11:cada08fc8a70 767 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
mbedAustin 11:cada08fc8a70 768 {
mbedAustin 11:cada08fc8a70 769 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 770 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
mbedAustin 11:cada08fc8a70 771 }
mbedAustin 11:cada08fc8a70 772
mbedAustin 11:cada08fc8a70 773 if( ( ret = mbedtls_x509_get_name( &p, p + len, &crt->issuer ) ) != 0 )
mbedAustin 11:cada08fc8a70 774 {
mbedAustin 11:cada08fc8a70 775 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 776 return( ret );
mbedAustin 11:cada08fc8a70 777 }
mbedAustin 11:cada08fc8a70 778
mbedAustin 11:cada08fc8a70 779 crt->issuer_raw.len = p - crt->issuer_raw.p;
mbedAustin 11:cada08fc8a70 780
mbedAustin 11:cada08fc8a70 781 /*
mbedAustin 11:cada08fc8a70 782 * Validity ::= SEQUENCE {
mbedAustin 11:cada08fc8a70 783 * notBefore Time,
mbedAustin 11:cada08fc8a70 784 * notAfter Time }
mbedAustin 11:cada08fc8a70 785 *
mbedAustin 11:cada08fc8a70 786 */
mbedAustin 11:cada08fc8a70 787 if( ( ret = x509_get_dates( &p, end, &crt->valid_from,
mbedAustin 11:cada08fc8a70 788 &crt->valid_to ) ) != 0 )
mbedAustin 11:cada08fc8a70 789 {
mbedAustin 11:cada08fc8a70 790 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 791 return( ret );
mbedAustin 11:cada08fc8a70 792 }
mbedAustin 11:cada08fc8a70 793
mbedAustin 11:cada08fc8a70 794 /*
mbedAustin 11:cada08fc8a70 795 * subject Name
mbedAustin 11:cada08fc8a70 796 */
mbedAustin 11:cada08fc8a70 797 crt->subject_raw.p = p;
mbedAustin 11:cada08fc8a70 798
mbedAustin 11:cada08fc8a70 799 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
mbedAustin 11:cada08fc8a70 800 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
mbedAustin 11:cada08fc8a70 801 {
mbedAustin 11:cada08fc8a70 802 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 803 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
mbedAustin 11:cada08fc8a70 804 }
mbedAustin 11:cada08fc8a70 805
mbedAustin 11:cada08fc8a70 806 if( len && ( ret = mbedtls_x509_get_name( &p, p + len, &crt->subject ) ) != 0 )
mbedAustin 11:cada08fc8a70 807 {
mbedAustin 11:cada08fc8a70 808 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 809 return( ret );
mbedAustin 11:cada08fc8a70 810 }
mbedAustin 11:cada08fc8a70 811
mbedAustin 11:cada08fc8a70 812 crt->subject_raw.len = p - crt->subject_raw.p;
mbedAustin 11:cada08fc8a70 813
mbedAustin 11:cada08fc8a70 814 /*
mbedAustin 11:cada08fc8a70 815 * SubjectPublicKeyInfo
mbedAustin 11:cada08fc8a70 816 */
mbedAustin 11:cada08fc8a70 817 if( ( ret = mbedtls_pk_parse_subpubkey( &p, end, &crt->pk ) ) != 0 )
mbedAustin 11:cada08fc8a70 818 {
mbedAustin 11:cada08fc8a70 819 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 820 return( ret );
mbedAustin 11:cada08fc8a70 821 }
mbedAustin 11:cada08fc8a70 822
mbedAustin 11:cada08fc8a70 823 /*
mbedAustin 11:cada08fc8a70 824 * issuerUniqueID [1] IMPLICIT UniqueIdentifier OPTIONAL,
mbedAustin 11:cada08fc8a70 825 * -- If present, version shall be v2 or v3
mbedAustin 11:cada08fc8a70 826 * subjectUniqueID [2] IMPLICIT UniqueIdentifier OPTIONAL,
mbedAustin 11:cada08fc8a70 827 * -- If present, version shall be v2 or v3
mbedAustin 11:cada08fc8a70 828 * extensions [3] EXPLICIT Extensions OPTIONAL
mbedAustin 11:cada08fc8a70 829 * -- If present, version shall be v3
mbedAustin 11:cada08fc8a70 830 */
mbedAustin 11:cada08fc8a70 831 if( crt->version == 2 || crt->version == 3 )
mbedAustin 11:cada08fc8a70 832 {
mbedAustin 11:cada08fc8a70 833 ret = x509_get_uid( &p, end, &crt->issuer_id, 1 );
mbedAustin 11:cada08fc8a70 834 if( ret != 0 )
mbedAustin 11:cada08fc8a70 835 {
mbedAustin 11:cada08fc8a70 836 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 837 return( ret );
mbedAustin 11:cada08fc8a70 838 }
mbedAustin 11:cada08fc8a70 839 }
mbedAustin 11:cada08fc8a70 840
mbedAustin 11:cada08fc8a70 841 if( crt->version == 2 || crt->version == 3 )
mbedAustin 11:cada08fc8a70 842 {
mbedAustin 11:cada08fc8a70 843 ret = x509_get_uid( &p, end, &crt->subject_id, 2 );
mbedAustin 11:cada08fc8a70 844 if( ret != 0 )
mbedAustin 11:cada08fc8a70 845 {
mbedAustin 11:cada08fc8a70 846 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 847 return( ret );
mbedAustin 11:cada08fc8a70 848 }
mbedAustin 11:cada08fc8a70 849 }
mbedAustin 11:cada08fc8a70 850
mbedAustin 11:cada08fc8a70 851 #if !defined(MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3)
mbedAustin 11:cada08fc8a70 852 if( crt->version == 3 )
mbedAustin 11:cada08fc8a70 853 #endif
mbedAustin 11:cada08fc8a70 854 {
mbedAustin 11:cada08fc8a70 855 ret = x509_get_crt_ext( &p, end, crt );
mbedAustin 11:cada08fc8a70 856 if( ret != 0 )
mbedAustin 11:cada08fc8a70 857 {
mbedAustin 11:cada08fc8a70 858 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 859 return( ret );
mbedAustin 11:cada08fc8a70 860 }
mbedAustin 11:cada08fc8a70 861 }
mbedAustin 11:cada08fc8a70 862
mbedAustin 11:cada08fc8a70 863 if( p != end )
mbedAustin 11:cada08fc8a70 864 {
mbedAustin 11:cada08fc8a70 865 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 866 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
mbedAustin 11:cada08fc8a70 867 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
mbedAustin 11:cada08fc8a70 868 }
mbedAustin 11:cada08fc8a70 869
mbedAustin 11:cada08fc8a70 870 end = crt_end;
mbedAustin 11:cada08fc8a70 871
mbedAustin 11:cada08fc8a70 872 /*
mbedAustin 11:cada08fc8a70 873 * }
mbedAustin 11:cada08fc8a70 874 * -- end of TBSCertificate
mbedAustin 11:cada08fc8a70 875 *
mbedAustin 11:cada08fc8a70 876 * signatureAlgorithm AlgorithmIdentifier,
mbedAustin 11:cada08fc8a70 877 * signatureValue BIT STRING
mbedAustin 11:cada08fc8a70 878 */
mbedAustin 11:cada08fc8a70 879 if( ( ret = mbedtls_x509_get_alg( &p, end, &sig_oid2, &sig_params2 ) ) != 0 )
mbedAustin 11:cada08fc8a70 880 {
mbedAustin 11:cada08fc8a70 881 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 882 return( ret );
mbedAustin 11:cada08fc8a70 883 }
mbedAustin 11:cada08fc8a70 884
mbedAustin 11:cada08fc8a70 885 if( crt->sig_oid.len != sig_oid2.len ||
mbedAustin 11:cada08fc8a70 886 memcmp( crt->sig_oid.p, sig_oid2.p, crt->sig_oid.len ) != 0 ||
mbedAustin 11:cada08fc8a70 887 sig_params1.len != sig_params2.len ||
mbedAustin 11:cada08fc8a70 888 ( sig_params1.len != 0 &&
mbedAustin 11:cada08fc8a70 889 memcmp( sig_params1.p, sig_params2.p, sig_params1.len ) != 0 ) )
mbedAustin 11:cada08fc8a70 890 {
mbedAustin 11:cada08fc8a70 891 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 892 return( MBEDTLS_ERR_X509_SIG_MISMATCH );
mbedAustin 11:cada08fc8a70 893 }
mbedAustin 11:cada08fc8a70 894
mbedAustin 11:cada08fc8a70 895 if( ( ret = mbedtls_x509_get_sig( &p, end, &crt->sig ) ) != 0 )
mbedAustin 11:cada08fc8a70 896 {
mbedAustin 11:cada08fc8a70 897 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 898 return( ret );
mbedAustin 11:cada08fc8a70 899 }
mbedAustin 11:cada08fc8a70 900
mbedAustin 11:cada08fc8a70 901 if( p != end )
mbedAustin 11:cada08fc8a70 902 {
mbedAustin 11:cada08fc8a70 903 mbedtls_x509_crt_free( crt );
mbedAustin 11:cada08fc8a70 904 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
mbedAustin 11:cada08fc8a70 905 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
mbedAustin 11:cada08fc8a70 906 }
mbedAustin 11:cada08fc8a70 907
mbedAustin 11:cada08fc8a70 908 return( 0 );
mbedAustin 11:cada08fc8a70 909 }
mbedAustin 11:cada08fc8a70 910
mbedAustin 11:cada08fc8a70 911 /*
mbedAustin 11:cada08fc8a70 912 * Parse one X.509 certificate in DER format from a buffer and add them to a
mbedAustin 11:cada08fc8a70 913 * chained list
mbedAustin 11:cada08fc8a70 914 */
mbedAustin 11:cada08fc8a70 915 int mbedtls_x509_crt_parse_der( mbedtls_x509_crt *chain, const unsigned char *buf,
mbedAustin 11:cada08fc8a70 916 size_t buflen )
mbedAustin 11:cada08fc8a70 917 {
mbedAustin 11:cada08fc8a70 918 int ret;
mbedAustin 11:cada08fc8a70 919 mbedtls_x509_crt *crt = chain, *prev = NULL;
mbedAustin 11:cada08fc8a70 920
mbedAustin 11:cada08fc8a70 921 /*
mbedAustin 11:cada08fc8a70 922 * Check for valid input
mbedAustin 11:cada08fc8a70 923 */
mbedAustin 11:cada08fc8a70 924 if( crt == NULL || buf == NULL )
mbedAustin 11:cada08fc8a70 925 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
mbedAustin 11:cada08fc8a70 926
mbedAustin 11:cada08fc8a70 927 while( crt->version != 0 && crt->next != NULL )
mbedAustin 11:cada08fc8a70 928 {
mbedAustin 11:cada08fc8a70 929 prev = crt;
mbedAustin 11:cada08fc8a70 930 crt = crt->next;
mbedAustin 11:cada08fc8a70 931 }
mbedAustin 11:cada08fc8a70 932
mbedAustin 11:cada08fc8a70 933 /*
mbedAustin 11:cada08fc8a70 934 * Add new certificate on the end of the chain if needed.
mbedAustin 11:cada08fc8a70 935 */
mbedAustin 11:cada08fc8a70 936 if( crt->version != 0 && crt->next == NULL )
mbedAustin 11:cada08fc8a70 937 {
mbedAustin 11:cada08fc8a70 938 crt->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) );
mbedAustin 11:cada08fc8a70 939
mbedAustin 11:cada08fc8a70 940 if( crt->next == NULL )
mbedAustin 11:cada08fc8a70 941 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
mbedAustin 11:cada08fc8a70 942
mbedAustin 11:cada08fc8a70 943 prev = crt;
mbedAustin 11:cada08fc8a70 944 mbedtls_x509_crt_init( crt->next );
mbedAustin 11:cada08fc8a70 945 crt = crt->next;
mbedAustin 11:cada08fc8a70 946 }
mbedAustin 11:cada08fc8a70 947
mbedAustin 11:cada08fc8a70 948 if( ( ret = x509_crt_parse_der_core( crt, buf, buflen ) ) != 0 )
mbedAustin 11:cada08fc8a70 949 {
mbedAustin 11:cada08fc8a70 950 if( prev )
mbedAustin 11:cada08fc8a70 951 prev->next = NULL;
mbedAustin 11:cada08fc8a70 952
mbedAustin 11:cada08fc8a70 953 if( crt != chain )
mbedAustin 11:cada08fc8a70 954 mbedtls_free( crt );
mbedAustin 11:cada08fc8a70 955
mbedAustin 11:cada08fc8a70 956 return( ret );
mbedAustin 11:cada08fc8a70 957 }
mbedAustin 11:cada08fc8a70 958
mbedAustin 11:cada08fc8a70 959 return( 0 );
mbedAustin 11:cada08fc8a70 960 }
mbedAustin 11:cada08fc8a70 961
mbedAustin 11:cada08fc8a70 962 /*
mbedAustin 11:cada08fc8a70 963 * Parse one or more PEM certificates from a buffer and add them to the chained
mbedAustin 11:cada08fc8a70 964 * list
mbedAustin 11:cada08fc8a70 965 */
mbedAustin 11:cada08fc8a70 966 int mbedtls_x509_crt_parse( mbedtls_x509_crt *chain, const unsigned char *buf, size_t buflen )
mbedAustin 11:cada08fc8a70 967 {
mbedAustin 11:cada08fc8a70 968 int success = 0, first_error = 0, total_failed = 0;
mbedAustin 11:cada08fc8a70 969 int buf_format = MBEDTLS_X509_FORMAT_DER;
mbedAustin 11:cada08fc8a70 970
mbedAustin 11:cada08fc8a70 971 /*
mbedAustin 11:cada08fc8a70 972 * Check for valid input
mbedAustin 11:cada08fc8a70 973 */
mbedAustin 11:cada08fc8a70 974 if( chain == NULL || buf == NULL )
mbedAustin 11:cada08fc8a70 975 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
mbedAustin 11:cada08fc8a70 976
mbedAustin 11:cada08fc8a70 977 /*
mbedAustin 11:cada08fc8a70 978 * Determine buffer content. Buffer contains either one DER certificate or
mbedAustin 11:cada08fc8a70 979 * one or more PEM certificates.
mbedAustin 11:cada08fc8a70 980 */
mbedAustin 11:cada08fc8a70 981 #if defined(MBEDTLS_PEM_PARSE_C)
mbedAustin 11:cada08fc8a70 982 if( buflen != 0 && buf[buflen - 1] == '\0' &&
mbedAustin 11:cada08fc8a70 983 strstr( (const char *) buf, "-----BEGIN CERTIFICATE-----" ) != NULL )
mbedAustin 11:cada08fc8a70 984 {
mbedAustin 11:cada08fc8a70 985 buf_format = MBEDTLS_X509_FORMAT_PEM;
mbedAustin 11:cada08fc8a70 986 }
mbedAustin 11:cada08fc8a70 987 #endif
mbedAustin 11:cada08fc8a70 988
mbedAustin 11:cada08fc8a70 989 if( buf_format == MBEDTLS_X509_FORMAT_DER )
mbedAustin 11:cada08fc8a70 990 return mbedtls_x509_crt_parse_der( chain, buf, buflen );
mbedAustin 11:cada08fc8a70 991
mbedAustin 11:cada08fc8a70 992 #if defined(MBEDTLS_PEM_PARSE_C)
mbedAustin 11:cada08fc8a70 993 if( buf_format == MBEDTLS_X509_FORMAT_PEM )
mbedAustin 11:cada08fc8a70 994 {
mbedAustin 11:cada08fc8a70 995 int ret;
mbedAustin 11:cada08fc8a70 996 mbedtls_pem_context pem;
mbedAustin 11:cada08fc8a70 997
mbedAustin 11:cada08fc8a70 998 /* 1 rather than 0 since the terminating NULL byte is counted in */
mbedAustin 11:cada08fc8a70 999 while( buflen > 1 )
mbedAustin 11:cada08fc8a70 1000 {
mbedAustin 11:cada08fc8a70 1001 size_t use_len;
mbedAustin 11:cada08fc8a70 1002 mbedtls_pem_init( &pem );
mbedAustin 11:cada08fc8a70 1003
mbedAustin 11:cada08fc8a70 1004 /* If we get there, we know the string is null-terminated */
mbedAustin 11:cada08fc8a70 1005 ret = mbedtls_pem_read_buffer( &pem,
mbedAustin 11:cada08fc8a70 1006 "-----BEGIN CERTIFICATE-----",
mbedAustin 11:cada08fc8a70 1007 "-----END CERTIFICATE-----",
mbedAustin 11:cada08fc8a70 1008 buf, NULL, 0, &use_len );
mbedAustin 11:cada08fc8a70 1009
mbedAustin 11:cada08fc8a70 1010 if( ret == 0 )
mbedAustin 11:cada08fc8a70 1011 {
mbedAustin 11:cada08fc8a70 1012 /*
mbedAustin 11:cada08fc8a70 1013 * Was PEM encoded
mbedAustin 11:cada08fc8a70 1014 */
mbedAustin 11:cada08fc8a70 1015 buflen -= use_len;
mbedAustin 11:cada08fc8a70 1016 buf += use_len;
mbedAustin 11:cada08fc8a70 1017 }
mbedAustin 11:cada08fc8a70 1018 else if( ret == MBEDTLS_ERR_PEM_BAD_INPUT_DATA )
mbedAustin 11:cada08fc8a70 1019 {
mbedAustin 11:cada08fc8a70 1020 return( ret );
mbedAustin 11:cada08fc8a70 1021 }
mbedAustin 11:cada08fc8a70 1022 else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
mbedAustin 11:cada08fc8a70 1023 {
mbedAustin 11:cada08fc8a70 1024 mbedtls_pem_free( &pem );
mbedAustin 11:cada08fc8a70 1025
mbedAustin 11:cada08fc8a70 1026 /*
mbedAustin 11:cada08fc8a70 1027 * PEM header and footer were found
mbedAustin 11:cada08fc8a70 1028 */
mbedAustin 11:cada08fc8a70 1029 buflen -= use_len;
mbedAustin 11:cada08fc8a70 1030 buf += use_len;
mbedAustin 11:cada08fc8a70 1031
mbedAustin 11:cada08fc8a70 1032 if( first_error == 0 )
mbedAustin 11:cada08fc8a70 1033 first_error = ret;
mbedAustin 11:cada08fc8a70 1034
mbedAustin 11:cada08fc8a70 1035 total_failed++;
mbedAustin 11:cada08fc8a70 1036 continue;
mbedAustin 11:cada08fc8a70 1037 }
mbedAustin 11:cada08fc8a70 1038 else
mbedAustin 11:cada08fc8a70 1039 break;
mbedAustin 11:cada08fc8a70 1040
mbedAustin 11:cada08fc8a70 1041 ret = mbedtls_x509_crt_parse_der( chain, pem.buf, pem.buflen );
mbedAustin 11:cada08fc8a70 1042
mbedAustin 11:cada08fc8a70 1043 mbedtls_pem_free( &pem );
mbedAustin 11:cada08fc8a70 1044
mbedAustin 11:cada08fc8a70 1045 if( ret != 0 )
mbedAustin 11:cada08fc8a70 1046 {
mbedAustin 11:cada08fc8a70 1047 /*
mbedAustin 11:cada08fc8a70 1048 * Quit parsing on a memory error
mbedAustin 11:cada08fc8a70 1049 */
mbedAustin 11:cada08fc8a70 1050 if( ret == MBEDTLS_ERR_X509_ALLOC_FAILED )
mbedAustin 11:cada08fc8a70 1051 return( ret );
mbedAustin 11:cada08fc8a70 1052
mbedAustin 11:cada08fc8a70 1053 if( first_error == 0 )
mbedAustin 11:cada08fc8a70 1054 first_error = ret;
mbedAustin 11:cada08fc8a70 1055
mbedAustin 11:cada08fc8a70 1056 total_failed++;
mbedAustin 11:cada08fc8a70 1057 continue;
mbedAustin 11:cada08fc8a70 1058 }
mbedAustin 11:cada08fc8a70 1059
mbedAustin 11:cada08fc8a70 1060 success = 1;
mbedAustin 11:cada08fc8a70 1061 }
mbedAustin 11:cada08fc8a70 1062 }
mbedAustin 11:cada08fc8a70 1063 #endif /* MBEDTLS_PEM_PARSE_C */
mbedAustin 11:cada08fc8a70 1064
mbedAustin 11:cada08fc8a70 1065 if( success )
mbedAustin 11:cada08fc8a70 1066 return( total_failed );
mbedAustin 11:cada08fc8a70 1067 else if( first_error )
mbedAustin 11:cada08fc8a70 1068 return( first_error );
mbedAustin 11:cada08fc8a70 1069 else
mbedAustin 11:cada08fc8a70 1070 return( MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT );
mbedAustin 11:cada08fc8a70 1071 }
mbedAustin 11:cada08fc8a70 1072
mbedAustin 11:cada08fc8a70 1073 #if defined(MBEDTLS_FS_IO)
mbedAustin 11:cada08fc8a70 1074 /*
mbedAustin 11:cada08fc8a70 1075 * Load one or more certificates and add them to the chained list
mbedAustin 11:cada08fc8a70 1076 */
mbedAustin 11:cada08fc8a70 1077 int mbedtls_x509_crt_parse_file( mbedtls_x509_crt *chain, const char *path )
mbedAustin 11:cada08fc8a70 1078 {
mbedAustin 11:cada08fc8a70 1079 int ret;
mbedAustin 11:cada08fc8a70 1080 size_t n;
mbedAustin 11:cada08fc8a70 1081 unsigned char *buf;
mbedAustin 11:cada08fc8a70 1082
mbedAustin 11:cada08fc8a70 1083 if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
mbedAustin 11:cada08fc8a70 1084 return( ret );
mbedAustin 11:cada08fc8a70 1085
mbedAustin 11:cada08fc8a70 1086 ret = mbedtls_x509_crt_parse( chain, buf, n );
mbedAustin 11:cada08fc8a70 1087
mbedAustin 11:cada08fc8a70 1088 mbedtls_zeroize( buf, n );
mbedAustin 11:cada08fc8a70 1089 mbedtls_free( buf );
mbedAustin 11:cada08fc8a70 1090
mbedAustin 11:cada08fc8a70 1091 return( ret );
mbedAustin 11:cada08fc8a70 1092 }
mbedAustin 11:cada08fc8a70 1093
mbedAustin 11:cada08fc8a70 1094 int mbedtls_x509_crt_parse_path( mbedtls_x509_crt *chain, const char *path )
mbedAustin 11:cada08fc8a70 1095 {
mbedAustin 11:cada08fc8a70 1096 int ret = 0;
mbedAustin 11:cada08fc8a70 1097 #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
mbedAustin 11:cada08fc8a70 1098 int w_ret;
mbedAustin 11:cada08fc8a70 1099 WCHAR szDir[MAX_PATH];
mbedAustin 11:cada08fc8a70 1100 char filename[MAX_PATH];
mbedAustin 11:cada08fc8a70 1101 char *p;
mbedAustin 11:cada08fc8a70 1102 size_t len = strlen( path );
mbedAustin 11:cada08fc8a70 1103
mbedAustin 11:cada08fc8a70 1104 WIN32_FIND_DATAW file_data;
mbedAustin 11:cada08fc8a70 1105 HANDLE hFind;
mbedAustin 11:cada08fc8a70 1106
mbedAustin 11:cada08fc8a70 1107 if( len > MAX_PATH - 3 )
mbedAustin 11:cada08fc8a70 1108 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
mbedAustin 11:cada08fc8a70 1109
mbedAustin 11:cada08fc8a70 1110 memset( szDir, 0, sizeof(szDir) );
mbedAustin 11:cada08fc8a70 1111 memset( filename, 0, MAX_PATH );
mbedAustin 11:cada08fc8a70 1112 memcpy( filename, path, len );
mbedAustin 11:cada08fc8a70 1113 filename[len++] = '\\';
mbedAustin 11:cada08fc8a70 1114 p = filename + len;
mbedAustin 11:cada08fc8a70 1115 filename[len++] = '*';
mbedAustin 11:cada08fc8a70 1116
mbedAustin 11:cada08fc8a70 1117 w_ret = MultiByteToWideChar( CP_ACP, 0, filename, len, szDir,
mbedAustin 11:cada08fc8a70 1118 MAX_PATH - 3 );
mbedAustin 11:cada08fc8a70 1119 if( w_ret == 0 )
mbedAustin 11:cada08fc8a70 1120 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
mbedAustin 11:cada08fc8a70 1121
mbedAustin 11:cada08fc8a70 1122 hFind = FindFirstFileW( szDir, &file_data );
mbedAustin 11:cada08fc8a70 1123 if( hFind == INVALID_HANDLE_VALUE )
mbedAustin 11:cada08fc8a70 1124 return( MBEDTLS_ERR_X509_FILE_IO_ERROR );
mbedAustin 11:cada08fc8a70 1125
mbedAustin 11:cada08fc8a70 1126 len = MAX_PATH - len;
mbedAustin 11:cada08fc8a70 1127 do
mbedAustin 11:cada08fc8a70 1128 {
mbedAustin 11:cada08fc8a70 1129 memset( p, 0, len );
mbedAustin 11:cada08fc8a70 1130
mbedAustin 11:cada08fc8a70 1131 if( file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY )
mbedAustin 11:cada08fc8a70 1132 continue;
mbedAustin 11:cada08fc8a70 1133
mbedAustin 11:cada08fc8a70 1134 w_ret = WideCharToMultiByte( CP_ACP, 0, file_data.cFileName,
mbedAustin 11:cada08fc8a70 1135 lstrlenW( file_data.cFileName ),
mbedAustin 11:cada08fc8a70 1136 p, (int) len - 1,
mbedAustin 11:cada08fc8a70 1137 NULL, NULL );
mbedAustin 11:cada08fc8a70 1138 if( w_ret == 0 )
mbedAustin 11:cada08fc8a70 1139 return( MBEDTLS_ERR_X509_FILE_IO_ERROR );
mbedAustin 11:cada08fc8a70 1140
mbedAustin 11:cada08fc8a70 1141 w_ret = mbedtls_x509_crt_parse_file( chain, filename );
mbedAustin 11:cada08fc8a70 1142 if( w_ret < 0 )
mbedAustin 11:cada08fc8a70 1143 ret++;
mbedAustin 11:cada08fc8a70 1144 else
mbedAustin 11:cada08fc8a70 1145 ret += w_ret;
mbedAustin 11:cada08fc8a70 1146 }
mbedAustin 11:cada08fc8a70 1147 while( FindNextFileW( hFind, &file_data ) != 0 );
mbedAustin 11:cada08fc8a70 1148
mbedAustin 11:cada08fc8a70 1149 if( GetLastError() != ERROR_NO_MORE_FILES )
mbedAustin 11:cada08fc8a70 1150 ret = MBEDTLS_ERR_X509_FILE_IO_ERROR;
mbedAustin 11:cada08fc8a70 1151
mbedAustin 11:cada08fc8a70 1152 FindClose( hFind );
mbedAustin 11:cada08fc8a70 1153 #else /* _WIN32 */
mbedAustin 11:cada08fc8a70 1154 int t_ret;
mbedAustin 11:cada08fc8a70 1155 struct stat sb;
mbedAustin 11:cada08fc8a70 1156 struct dirent *entry;
mbedAustin 11:cada08fc8a70 1157 char entry_name[255];
mbedAustin 11:cada08fc8a70 1158 DIR *dir = opendir( path );
mbedAustin 11:cada08fc8a70 1159
mbedAustin 11:cada08fc8a70 1160 if( dir == NULL )
mbedAustin 11:cada08fc8a70 1161 return( MBEDTLS_ERR_X509_FILE_IO_ERROR );
mbedAustin 11:cada08fc8a70 1162
mbedAustin 11:cada08fc8a70 1163 #if defined(MBEDTLS_THREADING_PTHREAD)
mbedAustin 11:cada08fc8a70 1164 if( ( ret = mbedtls_mutex_lock( &mbedtls_threading_readdir_mutex ) ) != 0 )
mbedAustin 11:cada08fc8a70 1165 {
mbedAustin 11:cada08fc8a70 1166 closedir( dir );
mbedAustin 11:cada08fc8a70 1167 return( ret );
mbedAustin 11:cada08fc8a70 1168 }
mbedAustin 11:cada08fc8a70 1169 #endif
mbedAustin 11:cada08fc8a70 1170
mbedAustin 11:cada08fc8a70 1171 while( ( entry = readdir( dir ) ) != NULL )
mbedAustin 11:cada08fc8a70 1172 {
mbedAustin 11:cada08fc8a70 1173 mbedtls_snprintf( entry_name, sizeof entry_name, "%s/%s", path, entry->d_name );
mbedAustin 11:cada08fc8a70 1174
mbedAustin 11:cada08fc8a70 1175 if( stat( entry_name, &sb ) == -1 )
mbedAustin 11:cada08fc8a70 1176 {
mbedAustin 11:cada08fc8a70 1177 closedir( dir );
mbedAustin 11:cada08fc8a70 1178 ret = MBEDTLS_ERR_X509_FILE_IO_ERROR;
mbedAustin 11:cada08fc8a70 1179 goto cleanup;
mbedAustin 11:cada08fc8a70 1180 }
mbedAustin 11:cada08fc8a70 1181
mbedAustin 11:cada08fc8a70 1182 if( !S_ISREG( sb.st_mode ) )
mbedAustin 11:cada08fc8a70 1183 continue;
mbedAustin 11:cada08fc8a70 1184
mbedAustin 11:cada08fc8a70 1185 // Ignore parse errors
mbedAustin 11:cada08fc8a70 1186 //
mbedAustin 11:cada08fc8a70 1187 t_ret = mbedtls_x509_crt_parse_file( chain, entry_name );
mbedAustin 11:cada08fc8a70 1188 if( t_ret < 0 )
mbedAustin 11:cada08fc8a70 1189 ret++;
mbedAustin 11:cada08fc8a70 1190 else
mbedAustin 11:cada08fc8a70 1191 ret += t_ret;
mbedAustin 11:cada08fc8a70 1192 }
mbedAustin 11:cada08fc8a70 1193 closedir( dir );
mbedAustin 11:cada08fc8a70 1194
mbedAustin 11:cada08fc8a70 1195 cleanup:
mbedAustin 11:cada08fc8a70 1196 #if defined(MBEDTLS_THREADING_PTHREAD)
mbedAustin 11:cada08fc8a70 1197 if( mbedtls_mutex_unlock( &mbedtls_threading_readdir_mutex ) != 0 )
mbedAustin 11:cada08fc8a70 1198 ret = MBEDTLS_ERR_THREADING_MUTEX_ERROR;
mbedAustin 11:cada08fc8a70 1199 #endif
mbedAustin 11:cada08fc8a70 1200
mbedAustin 11:cada08fc8a70 1201 #endif /* _WIN32 */
mbedAustin 11:cada08fc8a70 1202
mbedAustin 11:cada08fc8a70 1203 return( ret );
mbedAustin 11:cada08fc8a70 1204 }
mbedAustin 11:cada08fc8a70 1205 #endif /* MBEDTLS_FS_IO */
mbedAustin 11:cada08fc8a70 1206
mbedAustin 11:cada08fc8a70 1207 static int x509_info_subject_alt_name( char **buf, size_t *size,
mbedAustin 11:cada08fc8a70 1208 const mbedtls_x509_sequence *subject_alt_name )
mbedAustin 11:cada08fc8a70 1209 {
mbedAustin 11:cada08fc8a70 1210 size_t i;
mbedAustin 11:cada08fc8a70 1211 size_t n = *size;
mbedAustin 11:cada08fc8a70 1212 char *p = *buf;
mbedAustin 11:cada08fc8a70 1213 const mbedtls_x509_sequence *cur = subject_alt_name;
mbedAustin 11:cada08fc8a70 1214 const char *sep = "";
mbedAustin 11:cada08fc8a70 1215 size_t sep_len = 0;
mbedAustin 11:cada08fc8a70 1216
mbedAustin 11:cada08fc8a70 1217 while( cur != NULL )
mbedAustin 11:cada08fc8a70 1218 {
mbedAustin 11:cada08fc8a70 1219 if( cur->buf.len + sep_len >= n )
mbedAustin 11:cada08fc8a70 1220 {
mbedAustin 11:cada08fc8a70 1221 *p = '\0';
mbedAustin 11:cada08fc8a70 1222 return( MBEDTLS_ERR_X509_BUFFER_TOO_SMALL );
mbedAustin 11:cada08fc8a70 1223 }
mbedAustin 11:cada08fc8a70 1224
mbedAustin 11:cada08fc8a70 1225 n -= cur->buf.len + sep_len;
mbedAustin 11:cada08fc8a70 1226 for( i = 0; i < sep_len; i++ )
mbedAustin 11:cada08fc8a70 1227 *p++ = sep[i];
mbedAustin 11:cada08fc8a70 1228 for( i = 0; i < cur->buf.len; i++ )
mbedAustin 11:cada08fc8a70 1229 *p++ = cur->buf.p[i];
mbedAustin 11:cada08fc8a70 1230
mbedAustin 11:cada08fc8a70 1231 sep = ", ";
mbedAustin 11:cada08fc8a70 1232 sep_len = 2;
mbedAustin 11:cada08fc8a70 1233
mbedAustin 11:cada08fc8a70 1234 cur = cur->next;
mbedAustin 11:cada08fc8a70 1235 }
mbedAustin 11:cada08fc8a70 1236
mbedAustin 11:cada08fc8a70 1237 *p = '\0';
mbedAustin 11:cada08fc8a70 1238
mbedAustin 11:cada08fc8a70 1239 *size = n;
mbedAustin 11:cada08fc8a70 1240 *buf = p;
mbedAustin 11:cada08fc8a70 1241
mbedAustin 11:cada08fc8a70 1242 return( 0 );
mbedAustin 11:cada08fc8a70 1243 }
mbedAustin 11:cada08fc8a70 1244
mbedAustin 11:cada08fc8a70 1245 #define PRINT_ITEM(i) \
mbedAustin 11:cada08fc8a70 1246 { \
mbedAustin 11:cada08fc8a70 1247 ret = mbedtls_snprintf( p, n, "%s" i, sep ); \
mbedAustin 11:cada08fc8a70 1248 MBEDTLS_X509_SAFE_SNPRINTF; \
mbedAustin 11:cada08fc8a70 1249 sep = ", "; \
mbedAustin 11:cada08fc8a70 1250 }
mbedAustin 11:cada08fc8a70 1251
mbedAustin 11:cada08fc8a70 1252 #define CERT_TYPE(type,name) \
mbedAustin 11:cada08fc8a70 1253 if( ns_cert_type & type ) \
mbedAustin 11:cada08fc8a70 1254 PRINT_ITEM( name );
mbedAustin 11:cada08fc8a70 1255
mbedAustin 11:cada08fc8a70 1256 static int x509_info_cert_type( char **buf, size_t *size,
mbedAustin 11:cada08fc8a70 1257 unsigned char ns_cert_type )
mbedAustin 11:cada08fc8a70 1258 {
mbedAustin 11:cada08fc8a70 1259 int ret;
mbedAustin 11:cada08fc8a70 1260 size_t n = *size;
mbedAustin 11:cada08fc8a70 1261 char *p = *buf;
mbedAustin 11:cada08fc8a70 1262 const char *sep = "";
mbedAustin 11:cada08fc8a70 1263
mbedAustin 11:cada08fc8a70 1264 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT, "SSL Client" );
mbedAustin 11:cada08fc8a70 1265 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER, "SSL Server" );
mbedAustin 11:cada08fc8a70 1266 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_EMAIL, "Email" );
mbedAustin 11:cada08fc8a70 1267 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING, "Object Signing" );
mbedAustin 11:cada08fc8a70 1268 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_RESERVED, "Reserved" );
mbedAustin 11:cada08fc8a70 1269 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_SSL_CA, "SSL CA" );
mbedAustin 11:cada08fc8a70 1270 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_EMAIL_CA, "Email CA" );
mbedAustin 11:cada08fc8a70 1271 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING_CA, "Object Signing CA" );
mbedAustin 11:cada08fc8a70 1272
mbedAustin 11:cada08fc8a70 1273 *size = n;
mbedAustin 11:cada08fc8a70 1274 *buf = p;
mbedAustin 11:cada08fc8a70 1275
mbedAustin 11:cada08fc8a70 1276 return( 0 );
mbedAustin 11:cada08fc8a70 1277 }
mbedAustin 11:cada08fc8a70 1278
mbedAustin 11:cada08fc8a70 1279 #define KEY_USAGE(code,name) \
mbedAustin 11:cada08fc8a70 1280 if( key_usage & code ) \
mbedAustin 11:cada08fc8a70 1281 PRINT_ITEM( name );
mbedAustin 11:cada08fc8a70 1282
mbedAustin 11:cada08fc8a70 1283 static int x509_info_key_usage( char **buf, size_t *size,
mbedAustin 11:cada08fc8a70 1284 unsigned int key_usage )
mbedAustin 11:cada08fc8a70 1285 {
mbedAustin 11:cada08fc8a70 1286 int ret;
mbedAustin 11:cada08fc8a70 1287 size_t n = *size;
mbedAustin 11:cada08fc8a70 1288 char *p = *buf;
mbedAustin 11:cada08fc8a70 1289 const char *sep = "";
mbedAustin 11:cada08fc8a70 1290
mbedAustin 11:cada08fc8a70 1291 KEY_USAGE( MBEDTLS_X509_KU_DIGITAL_SIGNATURE, "Digital Signature" );
mbedAustin 11:cada08fc8a70 1292 KEY_USAGE( MBEDTLS_X509_KU_NON_REPUDIATION, "Non Repudiation" );
mbedAustin 11:cada08fc8a70 1293 KEY_USAGE( MBEDTLS_X509_KU_KEY_ENCIPHERMENT, "Key Encipherment" );
mbedAustin 11:cada08fc8a70 1294 KEY_USAGE( MBEDTLS_X509_KU_DATA_ENCIPHERMENT, "Data Encipherment" );
mbedAustin 11:cada08fc8a70 1295 KEY_USAGE( MBEDTLS_X509_KU_KEY_AGREEMENT, "Key Agreement" );
mbedAustin 11:cada08fc8a70 1296 KEY_USAGE( MBEDTLS_X509_KU_KEY_CERT_SIGN, "Key Cert Sign" );
mbedAustin 11:cada08fc8a70 1297 KEY_USAGE( MBEDTLS_X509_KU_CRL_SIGN, "CRL Sign" );
mbedAustin 11:cada08fc8a70 1298 KEY_USAGE( MBEDTLS_X509_KU_ENCIPHER_ONLY, "Encipher Only" );
mbedAustin 11:cada08fc8a70 1299 KEY_USAGE( MBEDTLS_X509_KU_DECIPHER_ONLY, "Decipher Only" );
mbedAustin 11:cada08fc8a70 1300
mbedAustin 11:cada08fc8a70 1301 *size = n;
mbedAustin 11:cada08fc8a70 1302 *buf = p;
mbedAustin 11:cada08fc8a70 1303
mbedAustin 11:cada08fc8a70 1304 return( 0 );
mbedAustin 11:cada08fc8a70 1305 }
mbedAustin 11:cada08fc8a70 1306
mbedAustin 11:cada08fc8a70 1307 static int x509_info_ext_key_usage( char **buf, size_t *size,
mbedAustin 11:cada08fc8a70 1308 const mbedtls_x509_sequence *extended_key_usage )
mbedAustin 11:cada08fc8a70 1309 {
mbedAustin 11:cada08fc8a70 1310 int ret;
mbedAustin 11:cada08fc8a70 1311 const char *desc;
mbedAustin 11:cada08fc8a70 1312 size_t n = *size;
mbedAustin 11:cada08fc8a70 1313 char *p = *buf;
mbedAustin 11:cada08fc8a70 1314 const mbedtls_x509_sequence *cur = extended_key_usage;
mbedAustin 11:cada08fc8a70 1315 const char *sep = "";
mbedAustin 11:cada08fc8a70 1316
mbedAustin 11:cada08fc8a70 1317 while( cur != NULL )
mbedAustin 11:cada08fc8a70 1318 {
mbedAustin 11:cada08fc8a70 1319 if( mbedtls_oid_get_extended_key_usage( &cur->buf, &desc ) != 0 )
mbedAustin 11:cada08fc8a70 1320 desc = "???";
mbedAustin 11:cada08fc8a70 1321
mbedAustin 11:cada08fc8a70 1322 ret = mbedtls_snprintf( p, n, "%s%s", sep, desc );
mbedAustin 11:cada08fc8a70 1323 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1324
mbedAustin 11:cada08fc8a70 1325 sep = ", ";
mbedAustin 11:cada08fc8a70 1326
mbedAustin 11:cada08fc8a70 1327 cur = cur->next;
mbedAustin 11:cada08fc8a70 1328 }
mbedAustin 11:cada08fc8a70 1329
mbedAustin 11:cada08fc8a70 1330 *size = n;
mbedAustin 11:cada08fc8a70 1331 *buf = p;
mbedAustin 11:cada08fc8a70 1332
mbedAustin 11:cada08fc8a70 1333 return( 0 );
mbedAustin 11:cada08fc8a70 1334 }
mbedAustin 11:cada08fc8a70 1335
mbedAustin 11:cada08fc8a70 1336 /*
mbedAustin 11:cada08fc8a70 1337 * Return an informational string about the certificate.
mbedAustin 11:cada08fc8a70 1338 */
mbedAustin 11:cada08fc8a70 1339 #define BEFORE_COLON 18
mbedAustin 11:cada08fc8a70 1340 #define BC "18"
mbedAustin 11:cada08fc8a70 1341 int mbedtls_x509_crt_info( char *buf, size_t size, const char *prefix,
mbedAustin 11:cada08fc8a70 1342 const mbedtls_x509_crt *crt )
mbedAustin 11:cada08fc8a70 1343 {
mbedAustin 11:cada08fc8a70 1344 int ret;
mbedAustin 11:cada08fc8a70 1345 size_t n;
mbedAustin 11:cada08fc8a70 1346 char *p;
mbedAustin 11:cada08fc8a70 1347 char key_size_str[BEFORE_COLON];
mbedAustin 11:cada08fc8a70 1348
mbedAustin 11:cada08fc8a70 1349 p = buf;
mbedAustin 11:cada08fc8a70 1350 n = size;
mbedAustin 11:cada08fc8a70 1351
mbedAustin 11:cada08fc8a70 1352 ret = mbedtls_snprintf( p, n, "%scert. version : %d\n",
mbedAustin 11:cada08fc8a70 1353 prefix, crt->version );
mbedAustin 11:cada08fc8a70 1354 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1355 ret = mbedtls_snprintf( p, n, "%sserial number : ",
mbedAustin 11:cada08fc8a70 1356 prefix );
mbedAustin 11:cada08fc8a70 1357 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1358
mbedAustin 11:cada08fc8a70 1359 ret = mbedtls_x509_serial_gets( p, n, &crt->serial );
mbedAustin 11:cada08fc8a70 1360 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1361
mbedAustin 11:cada08fc8a70 1362 ret = mbedtls_snprintf( p, n, "\n%sissuer name : ", prefix );
mbedAustin 11:cada08fc8a70 1363 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1364 ret = mbedtls_x509_dn_gets( p, n, &crt->issuer );
mbedAustin 11:cada08fc8a70 1365 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1366
mbedAustin 11:cada08fc8a70 1367 ret = mbedtls_snprintf( p, n, "\n%ssubject name : ", prefix );
mbedAustin 11:cada08fc8a70 1368 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1369 ret = mbedtls_x509_dn_gets( p, n, &crt->subject );
mbedAustin 11:cada08fc8a70 1370 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1371
mbedAustin 11:cada08fc8a70 1372 ret = mbedtls_snprintf( p, n, "\n%sissued on : " \
mbedAustin 11:cada08fc8a70 1373 "%04d-%02d-%02d %02d:%02d:%02d", prefix,
mbedAustin 11:cada08fc8a70 1374 crt->valid_from.year, crt->valid_from.mon,
mbedAustin 11:cada08fc8a70 1375 crt->valid_from.day, crt->valid_from.hour,
mbedAustin 11:cada08fc8a70 1376 crt->valid_from.min, crt->valid_from.sec );
mbedAustin 11:cada08fc8a70 1377 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1378
mbedAustin 11:cada08fc8a70 1379 ret = mbedtls_snprintf( p, n, "\n%sexpires on : " \
mbedAustin 11:cada08fc8a70 1380 "%04d-%02d-%02d %02d:%02d:%02d", prefix,
mbedAustin 11:cada08fc8a70 1381 crt->valid_to.year, crt->valid_to.mon,
mbedAustin 11:cada08fc8a70 1382 crt->valid_to.day, crt->valid_to.hour,
mbedAustin 11:cada08fc8a70 1383 crt->valid_to.min, crt->valid_to.sec );
mbedAustin 11:cada08fc8a70 1384 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1385
mbedAustin 11:cada08fc8a70 1386 ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix );
mbedAustin 11:cada08fc8a70 1387 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1388
mbedAustin 11:cada08fc8a70 1389 ret = mbedtls_x509_sig_alg_gets( p, n, &crt->sig_oid, crt->sig_pk,
mbedAustin 11:cada08fc8a70 1390 crt->sig_md, crt->sig_opts );
mbedAustin 11:cada08fc8a70 1391 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1392
mbedAustin 11:cada08fc8a70 1393 /* Key size */
mbedAustin 11:cada08fc8a70 1394 if( ( ret = mbedtls_x509_key_size_helper( key_size_str, BEFORE_COLON,
mbedAustin 11:cada08fc8a70 1395 mbedtls_pk_get_name( &crt->pk ) ) ) != 0 )
mbedAustin 11:cada08fc8a70 1396 {
mbedAustin 11:cada08fc8a70 1397 return( ret );
mbedAustin 11:cada08fc8a70 1398 }
mbedAustin 11:cada08fc8a70 1399
mbedAustin 11:cada08fc8a70 1400 ret = mbedtls_snprintf( p, n, "\n%s%-" BC "s: %d bits", prefix, key_size_str,
mbedAustin 11:cada08fc8a70 1401 (int) mbedtls_pk_get_bitlen( &crt->pk ) );
mbedAustin 11:cada08fc8a70 1402 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1403
mbedAustin 11:cada08fc8a70 1404 /*
mbedAustin 11:cada08fc8a70 1405 * Optional extensions
mbedAustin 11:cada08fc8a70 1406 */
mbedAustin 11:cada08fc8a70 1407
mbedAustin 11:cada08fc8a70 1408 if( crt->ext_types & MBEDTLS_X509_EXT_BASIC_CONSTRAINTS )
mbedAustin 11:cada08fc8a70 1409 {
mbedAustin 11:cada08fc8a70 1410 ret = mbedtls_snprintf( p, n, "\n%sbasic constraints : CA=%s", prefix,
mbedAustin 11:cada08fc8a70 1411 crt->ca_istrue ? "true" : "false" );
mbedAustin 11:cada08fc8a70 1412 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1413
mbedAustin 11:cada08fc8a70 1414 if( crt->max_pathlen > 0 )
mbedAustin 11:cada08fc8a70 1415 {
mbedAustin 11:cada08fc8a70 1416 ret = mbedtls_snprintf( p, n, ", max_pathlen=%d", crt->max_pathlen - 1 );
mbedAustin 11:cada08fc8a70 1417 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1418 }
mbedAustin 11:cada08fc8a70 1419 }
mbedAustin 11:cada08fc8a70 1420
mbedAustin 11:cada08fc8a70 1421 if( crt->ext_types & MBEDTLS_X509_EXT_SUBJECT_ALT_NAME )
mbedAustin 11:cada08fc8a70 1422 {
mbedAustin 11:cada08fc8a70 1423 ret = mbedtls_snprintf( p, n, "\n%ssubject alt name : ", prefix );
mbedAustin 11:cada08fc8a70 1424 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1425
mbedAustin 11:cada08fc8a70 1426 if( ( ret = x509_info_subject_alt_name( &p, &n,
mbedAustin 11:cada08fc8a70 1427 &crt->subject_alt_names ) ) != 0 )
mbedAustin 11:cada08fc8a70 1428 return( ret );
mbedAustin 11:cada08fc8a70 1429 }
mbedAustin 11:cada08fc8a70 1430
mbedAustin 11:cada08fc8a70 1431 if( crt->ext_types & MBEDTLS_X509_EXT_NS_CERT_TYPE )
mbedAustin 11:cada08fc8a70 1432 {
mbedAustin 11:cada08fc8a70 1433 ret = mbedtls_snprintf( p, n, "\n%scert. type : ", prefix );
mbedAustin 11:cada08fc8a70 1434 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1435
mbedAustin 11:cada08fc8a70 1436 if( ( ret = x509_info_cert_type( &p, &n, crt->ns_cert_type ) ) != 0 )
mbedAustin 11:cada08fc8a70 1437 return( ret );
mbedAustin 11:cada08fc8a70 1438 }
mbedAustin 11:cada08fc8a70 1439
mbedAustin 11:cada08fc8a70 1440 if( crt->ext_types & MBEDTLS_X509_EXT_KEY_USAGE )
mbedAustin 11:cada08fc8a70 1441 {
mbedAustin 11:cada08fc8a70 1442 ret = mbedtls_snprintf( p, n, "\n%skey usage : ", prefix );
mbedAustin 11:cada08fc8a70 1443 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1444
mbedAustin 11:cada08fc8a70 1445 if( ( ret = x509_info_key_usage( &p, &n, crt->key_usage ) ) != 0 )
mbedAustin 11:cada08fc8a70 1446 return( ret );
mbedAustin 11:cada08fc8a70 1447 }
mbedAustin 11:cada08fc8a70 1448
mbedAustin 11:cada08fc8a70 1449 if( crt->ext_types & MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE )
mbedAustin 11:cada08fc8a70 1450 {
mbedAustin 11:cada08fc8a70 1451 ret = mbedtls_snprintf( p, n, "\n%sext key usage : ", prefix );
mbedAustin 11:cada08fc8a70 1452 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1453
mbedAustin 11:cada08fc8a70 1454 if( ( ret = x509_info_ext_key_usage( &p, &n,
mbedAustin 11:cada08fc8a70 1455 &crt->ext_key_usage ) ) != 0 )
mbedAustin 11:cada08fc8a70 1456 return( ret );
mbedAustin 11:cada08fc8a70 1457 }
mbedAustin 11:cada08fc8a70 1458
mbedAustin 11:cada08fc8a70 1459 ret = mbedtls_snprintf( p, n, "\n" );
mbedAustin 11:cada08fc8a70 1460 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1461
mbedAustin 11:cada08fc8a70 1462 return( (int) ( size - n ) );
mbedAustin 11:cada08fc8a70 1463 }
mbedAustin 11:cada08fc8a70 1464
mbedAustin 11:cada08fc8a70 1465 struct x509_crt_verify_string {
mbedAustin 11:cada08fc8a70 1466 int code;
mbedAustin 11:cada08fc8a70 1467 const char *string;
mbedAustin 11:cada08fc8a70 1468 };
mbedAustin 11:cada08fc8a70 1469
mbedAustin 11:cada08fc8a70 1470 static const struct x509_crt_verify_string x509_crt_verify_strings[] = {
mbedAustin 11:cada08fc8a70 1471 { MBEDTLS_X509_BADCERT_EXPIRED, "The certificate validity has expired" },
mbedAustin 11:cada08fc8a70 1472 { MBEDTLS_X509_BADCERT_REVOKED, "The certificate has been revoked (is on a CRL)" },
mbedAustin 11:cada08fc8a70 1473 { MBEDTLS_X509_BADCERT_CN_MISMATCH, "The certificate Common Name (CN) does not match with the expected CN" },
mbedAustin 11:cada08fc8a70 1474 { MBEDTLS_X509_BADCERT_NOT_TRUSTED, "The certificate is not correctly signed by the trusted CA" },
mbedAustin 11:cada08fc8a70 1475 { MBEDTLS_X509_BADCRL_NOT_TRUSTED, "The CRL is not correctly signed by the trusted CA" },
mbedAustin 11:cada08fc8a70 1476 { MBEDTLS_X509_BADCRL_EXPIRED, "The CRL is expired" },
mbedAustin 11:cada08fc8a70 1477 { MBEDTLS_X509_BADCERT_MISSING, "Certificate was missing" },
mbedAustin 11:cada08fc8a70 1478 { MBEDTLS_X509_BADCERT_SKIP_VERIFY, "Certificate verification was skipped" },
mbedAustin 11:cada08fc8a70 1479 { MBEDTLS_X509_BADCERT_OTHER, "Other reason (can be used by verify callback)" },
mbedAustin 11:cada08fc8a70 1480 { MBEDTLS_X509_BADCERT_FUTURE, "The certificate validity starts in the future" },
mbedAustin 11:cada08fc8a70 1481 { MBEDTLS_X509_BADCRL_FUTURE, "The CRL is from the future" },
mbedAustin 11:cada08fc8a70 1482 { MBEDTLS_X509_BADCERT_KEY_USAGE, "Usage does not match the keyUsage extension" },
mbedAustin 11:cada08fc8a70 1483 { MBEDTLS_X509_BADCERT_EXT_KEY_USAGE, "Usage does not match the extendedKeyUsage extension" },
mbedAustin 11:cada08fc8a70 1484 { MBEDTLS_X509_BADCERT_NS_CERT_TYPE, "Usage does not match the nsCertType extension" },
mbedAustin 11:cada08fc8a70 1485 { MBEDTLS_X509_BADCERT_BAD_MD, "The certificate is signed with an unacceptable hash." },
mbedAustin 11:cada08fc8a70 1486 { MBEDTLS_X509_BADCERT_BAD_PK, "The certificate is signed with an unacceptable PK alg (eg RSA vs ECDSA)." },
mbedAustin 11:cada08fc8a70 1487 { MBEDTLS_X509_BADCERT_BAD_KEY, "The certificate is signed with an unacceptable key (eg bad curve, RSA too short)." },
mbedAustin 11:cada08fc8a70 1488 { MBEDTLS_X509_BADCRL_BAD_MD, "The CRL is signed with an unacceptable hash." },
mbedAustin 11:cada08fc8a70 1489 { MBEDTLS_X509_BADCRL_BAD_PK, "The CRL is signed with an unacceptable PK alg (eg RSA vs ECDSA)." },
mbedAustin 11:cada08fc8a70 1490 { MBEDTLS_X509_BADCRL_BAD_KEY, "The CRL is signed with an unacceptable key (eg bad curve, RSA too short)." },
mbedAustin 11:cada08fc8a70 1491 { 0, NULL }
mbedAustin 11:cada08fc8a70 1492 };
mbedAustin 11:cada08fc8a70 1493
mbedAustin 11:cada08fc8a70 1494 int mbedtls_x509_crt_verify_info( char *buf, size_t size, const char *prefix,
mbedAustin 11:cada08fc8a70 1495 uint32_t flags )
mbedAustin 11:cada08fc8a70 1496 {
mbedAustin 11:cada08fc8a70 1497 int ret;
mbedAustin 11:cada08fc8a70 1498 const struct x509_crt_verify_string *cur;
mbedAustin 11:cada08fc8a70 1499 char *p = buf;
mbedAustin 11:cada08fc8a70 1500 size_t n = size;
mbedAustin 11:cada08fc8a70 1501
mbedAustin 11:cada08fc8a70 1502 for( cur = x509_crt_verify_strings; cur->string != NULL ; cur++ )
mbedAustin 11:cada08fc8a70 1503 {
mbedAustin 11:cada08fc8a70 1504 if( ( flags & cur->code ) == 0 )
mbedAustin 11:cada08fc8a70 1505 continue;
mbedAustin 11:cada08fc8a70 1506
mbedAustin 11:cada08fc8a70 1507 ret = mbedtls_snprintf( p, n, "%s%s\n", prefix, cur->string );
mbedAustin 11:cada08fc8a70 1508 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1509 flags ^= cur->code;
mbedAustin 11:cada08fc8a70 1510 }
mbedAustin 11:cada08fc8a70 1511
mbedAustin 11:cada08fc8a70 1512 if( flags != 0 )
mbedAustin 11:cada08fc8a70 1513 {
mbedAustin 11:cada08fc8a70 1514 ret = mbedtls_snprintf( p, n, "%sUnknown reason "
mbedAustin 11:cada08fc8a70 1515 "(this should not happen)\n", prefix );
mbedAustin 11:cada08fc8a70 1516 MBEDTLS_X509_SAFE_SNPRINTF;
mbedAustin 11:cada08fc8a70 1517 }
mbedAustin 11:cada08fc8a70 1518
mbedAustin 11:cada08fc8a70 1519 return( (int) ( size - n ) );
mbedAustin 11:cada08fc8a70 1520 }
mbedAustin 11:cada08fc8a70 1521
mbedAustin 11:cada08fc8a70 1522 #if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
mbedAustin 11:cada08fc8a70 1523 int mbedtls_x509_crt_check_key_usage( const mbedtls_x509_crt *crt,
mbedAustin 11:cada08fc8a70 1524 unsigned int usage )
mbedAustin 11:cada08fc8a70 1525 {
mbedAustin 11:cada08fc8a70 1526 unsigned int usage_must, usage_may;
mbedAustin 11:cada08fc8a70 1527 unsigned int may_mask = MBEDTLS_X509_KU_ENCIPHER_ONLY
mbedAustin 11:cada08fc8a70 1528 | MBEDTLS_X509_KU_DECIPHER_ONLY;
mbedAustin 11:cada08fc8a70 1529
mbedAustin 11:cada08fc8a70 1530 if( ( crt->ext_types & MBEDTLS_X509_EXT_KEY_USAGE ) == 0 )
mbedAustin 11:cada08fc8a70 1531 return( 0 );
mbedAustin 11:cada08fc8a70 1532
mbedAustin 11:cada08fc8a70 1533 usage_must = usage & ~may_mask;
mbedAustin 11:cada08fc8a70 1534
mbedAustin 11:cada08fc8a70 1535 if( ( ( crt->key_usage & ~may_mask ) & usage_must ) != usage_must )
mbedAustin 11:cada08fc8a70 1536 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
mbedAustin 11:cada08fc8a70 1537
mbedAustin 11:cada08fc8a70 1538 usage_may = usage & may_mask;
mbedAustin 11:cada08fc8a70 1539
mbedAustin 11:cada08fc8a70 1540 if( ( ( crt->key_usage & may_mask ) | usage_may ) != usage_may )
mbedAustin 11:cada08fc8a70 1541 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
mbedAustin 11:cada08fc8a70 1542
mbedAustin 11:cada08fc8a70 1543 return( 0 );
mbedAustin 11:cada08fc8a70 1544 }
mbedAustin 11:cada08fc8a70 1545 #endif
mbedAustin 11:cada08fc8a70 1546
mbedAustin 11:cada08fc8a70 1547 #if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
mbedAustin 11:cada08fc8a70 1548 int mbedtls_x509_crt_check_extended_key_usage( const mbedtls_x509_crt *crt,
mbedAustin 11:cada08fc8a70 1549 const char *usage_oid,
mbedAustin 11:cada08fc8a70 1550 size_t usage_len )
mbedAustin 11:cada08fc8a70 1551 {
mbedAustin 11:cada08fc8a70 1552 const mbedtls_x509_sequence *cur;
mbedAustin 11:cada08fc8a70 1553
mbedAustin 11:cada08fc8a70 1554 /* Extension is not mandatory, absent means no restriction */
mbedAustin 11:cada08fc8a70 1555 if( ( crt->ext_types & MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE ) == 0 )
mbedAustin 11:cada08fc8a70 1556 return( 0 );
mbedAustin 11:cada08fc8a70 1557
mbedAustin 11:cada08fc8a70 1558 /*
mbedAustin 11:cada08fc8a70 1559 * Look for the requested usage (or wildcard ANY) in our list
mbedAustin 11:cada08fc8a70 1560 */
mbedAustin 11:cada08fc8a70 1561 for( cur = &crt->ext_key_usage; cur != NULL; cur = cur->next )
mbedAustin 11:cada08fc8a70 1562 {
mbedAustin 11:cada08fc8a70 1563 const mbedtls_x509_buf *cur_oid = &cur->buf;
mbedAustin 11:cada08fc8a70 1564
mbedAustin 11:cada08fc8a70 1565 if( cur_oid->len == usage_len &&
mbedAustin 11:cada08fc8a70 1566 memcmp( cur_oid->p, usage_oid, usage_len ) == 0 )
mbedAustin 11:cada08fc8a70 1567 {
mbedAustin 11:cada08fc8a70 1568 return( 0 );
mbedAustin 11:cada08fc8a70 1569 }
mbedAustin 11:cada08fc8a70 1570
mbedAustin 11:cada08fc8a70 1571 if( MBEDTLS_OID_CMP( MBEDTLS_OID_ANY_EXTENDED_KEY_USAGE, cur_oid ) == 0 )
mbedAustin 11:cada08fc8a70 1572 return( 0 );
mbedAustin 11:cada08fc8a70 1573 }
mbedAustin 11:cada08fc8a70 1574
mbedAustin 11:cada08fc8a70 1575 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
mbedAustin 11:cada08fc8a70 1576 }
mbedAustin 11:cada08fc8a70 1577 #endif /* MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE */
mbedAustin 11:cada08fc8a70 1578
mbedAustin 11:cada08fc8a70 1579 #if defined(MBEDTLS_X509_CRL_PARSE_C)
mbedAustin 11:cada08fc8a70 1580 /*
mbedAustin 11:cada08fc8a70 1581 * Return 1 if the certificate is revoked, or 0 otherwise.
mbedAustin 11:cada08fc8a70 1582 */
mbedAustin 11:cada08fc8a70 1583 int mbedtls_x509_crt_is_revoked( const mbedtls_x509_crt *crt, const mbedtls_x509_crl *crl )
mbedAustin 11:cada08fc8a70 1584 {
mbedAustin 11:cada08fc8a70 1585 const mbedtls_x509_crl_entry *cur = &crl->entry;
mbedAustin 11:cada08fc8a70 1586
mbedAustin 11:cada08fc8a70 1587 while( cur != NULL && cur->serial.len != 0 )
mbedAustin 11:cada08fc8a70 1588 {
mbedAustin 11:cada08fc8a70 1589 if( crt->serial.len == cur->serial.len &&
mbedAustin 11:cada08fc8a70 1590 memcmp( crt->serial.p, cur->serial.p, crt->serial.len ) == 0 )
mbedAustin 11:cada08fc8a70 1591 {
mbedAustin 11:cada08fc8a70 1592 if( mbedtls_x509_time_is_past( &cur->revocation_date ) )
mbedAustin 11:cada08fc8a70 1593 return( 1 );
mbedAustin 11:cada08fc8a70 1594 }
mbedAustin 11:cada08fc8a70 1595
mbedAustin 11:cada08fc8a70 1596 cur = cur->next;
mbedAustin 11:cada08fc8a70 1597 }
mbedAustin 11:cada08fc8a70 1598
mbedAustin 11:cada08fc8a70 1599 return( 0 );
mbedAustin 11:cada08fc8a70 1600 }
mbedAustin 11:cada08fc8a70 1601
mbedAustin 11:cada08fc8a70 1602 /*
mbedAustin 11:cada08fc8a70 1603 * Check that the given certificate is valid according to the CRL.
mbedAustin 11:cada08fc8a70 1604 */
mbedAustin 11:cada08fc8a70 1605 static int x509_crt_verifycrl( mbedtls_x509_crt *crt, mbedtls_x509_crt *ca,
mbedAustin 11:cada08fc8a70 1606 mbedtls_x509_crl *crl_list,
mbedAustin 11:cada08fc8a70 1607 const mbedtls_x509_crt_profile *profile )
mbedAustin 11:cada08fc8a70 1608 {
mbedAustin 11:cada08fc8a70 1609 int flags = 0;
mbedAustin 11:cada08fc8a70 1610 unsigned char hash[MBEDTLS_MD_MAX_SIZE];
mbedAustin 11:cada08fc8a70 1611 const mbedtls_md_info_t *md_info;
mbedAustin 11:cada08fc8a70 1612
mbedAustin 11:cada08fc8a70 1613 if( ca == NULL )
mbedAustin 11:cada08fc8a70 1614 return( flags );
mbedAustin 11:cada08fc8a70 1615
mbedAustin 11:cada08fc8a70 1616 /*
mbedAustin 11:cada08fc8a70 1617 * TODO: What happens if no CRL is present?
mbedAustin 11:cada08fc8a70 1618 * Suggestion: Revocation state should be unknown if no CRL is present.
mbedAustin 11:cada08fc8a70 1619 * For backwards compatibility this is not yet implemented.
mbedAustin 11:cada08fc8a70 1620 */
mbedAustin 11:cada08fc8a70 1621
mbedAustin 11:cada08fc8a70 1622 while( crl_list != NULL )
mbedAustin 11:cada08fc8a70 1623 {
mbedAustin 11:cada08fc8a70 1624 if( crl_list->version == 0 ||
mbedAustin 11:cada08fc8a70 1625 crl_list->issuer_raw.len != ca->subject_raw.len ||
mbedAustin 11:cada08fc8a70 1626 memcmp( crl_list->issuer_raw.p, ca->subject_raw.p,
mbedAustin 11:cada08fc8a70 1627 crl_list->issuer_raw.len ) != 0 )
mbedAustin 11:cada08fc8a70 1628 {
mbedAustin 11:cada08fc8a70 1629 crl_list = crl_list->next;
mbedAustin 11:cada08fc8a70 1630 continue;
mbedAustin 11:cada08fc8a70 1631 }
mbedAustin 11:cada08fc8a70 1632
mbedAustin 11:cada08fc8a70 1633 /*
mbedAustin 11:cada08fc8a70 1634 * Check if the CA is configured to sign CRLs
mbedAustin 11:cada08fc8a70 1635 */
mbedAustin 11:cada08fc8a70 1636 #if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
mbedAustin 11:cada08fc8a70 1637 if( mbedtls_x509_crt_check_key_usage( ca, MBEDTLS_X509_KU_CRL_SIGN ) != 0 )
mbedAustin 11:cada08fc8a70 1638 {
mbedAustin 11:cada08fc8a70 1639 flags |= MBEDTLS_X509_BADCRL_NOT_TRUSTED;
mbedAustin 11:cada08fc8a70 1640 break;
mbedAustin 11:cada08fc8a70 1641 }
mbedAustin 11:cada08fc8a70 1642 #endif
mbedAustin 11:cada08fc8a70 1643
mbedAustin 11:cada08fc8a70 1644 /*
mbedAustin 11:cada08fc8a70 1645 * Check if CRL is correctly signed by the trusted CA
mbedAustin 11:cada08fc8a70 1646 */
mbedAustin 11:cada08fc8a70 1647 if( x509_profile_check_md_alg( profile, crl_list->sig_md ) != 0 )
mbedAustin 11:cada08fc8a70 1648 flags |= MBEDTLS_X509_BADCRL_BAD_MD;
mbedAustin 11:cada08fc8a70 1649
mbedAustin 11:cada08fc8a70 1650 if( x509_profile_check_pk_alg( profile, crl_list->sig_pk ) != 0 )
mbedAustin 11:cada08fc8a70 1651 flags |= MBEDTLS_X509_BADCRL_BAD_PK;
mbedAustin 11:cada08fc8a70 1652
mbedAustin 11:cada08fc8a70 1653 md_info = mbedtls_md_info_from_type( crl_list->sig_md );
mbedAustin 11:cada08fc8a70 1654 if( md_info == NULL )
mbedAustin 11:cada08fc8a70 1655 {
mbedAustin 11:cada08fc8a70 1656 /*
mbedAustin 11:cada08fc8a70 1657 * Cannot check 'unknown' hash
mbedAustin 11:cada08fc8a70 1658 */
mbedAustin 11:cada08fc8a70 1659 flags |= MBEDTLS_X509_BADCRL_NOT_TRUSTED;
mbedAustin 11:cada08fc8a70 1660 break;
mbedAustin 11:cada08fc8a70 1661 }
mbedAustin 11:cada08fc8a70 1662
mbedAustin 11:cada08fc8a70 1663 mbedtls_md( md_info, crl_list->tbs.p, crl_list->tbs.len, hash );
mbedAustin 11:cada08fc8a70 1664
mbedAustin 11:cada08fc8a70 1665 if( x509_profile_check_key( profile, crl_list->sig_pk, &ca->pk ) != 0 )
mbedAustin 11:cada08fc8a70 1666 flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
mbedAustin 11:cada08fc8a70 1667
mbedAustin 11:cada08fc8a70 1668 if( mbedtls_pk_verify_ext( crl_list->sig_pk, crl_list->sig_opts, &ca->pk,
mbedAustin 11:cada08fc8a70 1669 crl_list->sig_md, hash, mbedtls_md_get_size( md_info ),
mbedAustin 11:cada08fc8a70 1670 crl_list->sig.p, crl_list->sig.len ) != 0 )
mbedAustin 11:cada08fc8a70 1671 {
mbedAustin 11:cada08fc8a70 1672 flags |= MBEDTLS_X509_BADCRL_NOT_TRUSTED;
mbedAustin 11:cada08fc8a70 1673 break;
mbedAustin 11:cada08fc8a70 1674 }
mbedAustin 11:cada08fc8a70 1675
mbedAustin 11:cada08fc8a70 1676 /*
mbedAustin 11:cada08fc8a70 1677 * Check for validity of CRL (Do not drop out)
mbedAustin 11:cada08fc8a70 1678 */
mbedAustin 11:cada08fc8a70 1679 if( mbedtls_x509_time_is_past( &crl_list->next_update ) )
mbedAustin 11:cada08fc8a70 1680 flags |= MBEDTLS_X509_BADCRL_EXPIRED;
mbedAustin 11:cada08fc8a70 1681
mbedAustin 11:cada08fc8a70 1682 if( mbedtls_x509_time_is_future( &crl_list->this_update ) )
mbedAustin 11:cada08fc8a70 1683 flags |= MBEDTLS_X509_BADCRL_FUTURE;
mbedAustin 11:cada08fc8a70 1684
mbedAustin 11:cada08fc8a70 1685 /*
mbedAustin 11:cada08fc8a70 1686 * Check if certificate is revoked
mbedAustin 11:cada08fc8a70 1687 */
mbedAustin 11:cada08fc8a70 1688 if( mbedtls_x509_crt_is_revoked( crt, crl_list ) )
mbedAustin 11:cada08fc8a70 1689 {
mbedAustin 11:cada08fc8a70 1690 flags |= MBEDTLS_X509_BADCERT_REVOKED;
mbedAustin 11:cada08fc8a70 1691 break;
mbedAustin 11:cada08fc8a70 1692 }
mbedAustin 11:cada08fc8a70 1693
mbedAustin 11:cada08fc8a70 1694 crl_list = crl_list->next;
mbedAustin 11:cada08fc8a70 1695 }
mbedAustin 11:cada08fc8a70 1696
mbedAustin 11:cada08fc8a70 1697 return( flags );
mbedAustin 11:cada08fc8a70 1698 }
mbedAustin 11:cada08fc8a70 1699 #endif /* MBEDTLS_X509_CRL_PARSE_C */
mbedAustin 11:cada08fc8a70 1700
mbedAustin 11:cada08fc8a70 1701 /*
mbedAustin 11:cada08fc8a70 1702 * Like memcmp, but case-insensitive and always returns -1 if different
mbedAustin 11:cada08fc8a70 1703 */
mbedAustin 11:cada08fc8a70 1704 static int x509_memcasecmp( const void *s1, const void *s2, size_t len )
mbedAustin 11:cada08fc8a70 1705 {
mbedAustin 11:cada08fc8a70 1706 size_t i;
mbedAustin 11:cada08fc8a70 1707 unsigned char diff;
mbedAustin 11:cada08fc8a70 1708 const unsigned char *n1 = s1, *n2 = s2;
mbedAustin 11:cada08fc8a70 1709
mbedAustin 11:cada08fc8a70 1710 for( i = 0; i < len; i++ )
mbedAustin 11:cada08fc8a70 1711 {
mbedAustin 11:cada08fc8a70 1712 diff = n1[i] ^ n2[i];
mbedAustin 11:cada08fc8a70 1713
mbedAustin 11:cada08fc8a70 1714 if( diff == 0 )
mbedAustin 11:cada08fc8a70 1715 continue;
mbedAustin 11:cada08fc8a70 1716
mbedAustin 11:cada08fc8a70 1717 if( diff == 32 &&
mbedAustin 11:cada08fc8a70 1718 ( ( n1[i] >= 'a' && n1[i] <= 'z' ) ||
mbedAustin 11:cada08fc8a70 1719 ( n1[i] >= 'A' && n1[i] <= 'Z' ) ) )
mbedAustin 11:cada08fc8a70 1720 {
mbedAustin 11:cada08fc8a70 1721 continue;
mbedAustin 11:cada08fc8a70 1722 }
mbedAustin 11:cada08fc8a70 1723
mbedAustin 11:cada08fc8a70 1724 return( -1 );
mbedAustin 11:cada08fc8a70 1725 }
mbedAustin 11:cada08fc8a70 1726
mbedAustin 11:cada08fc8a70 1727 return( 0 );
mbedAustin 11:cada08fc8a70 1728 }
mbedAustin 11:cada08fc8a70 1729
mbedAustin 11:cada08fc8a70 1730 /*
mbedAustin 11:cada08fc8a70 1731 * Return 0 if name matches wildcard, -1 otherwise
mbedAustin 11:cada08fc8a70 1732 */
mbedAustin 11:cada08fc8a70 1733 static int x509_check_wildcard( const char *cn, mbedtls_x509_buf *name )
mbedAustin 11:cada08fc8a70 1734 {
mbedAustin 11:cada08fc8a70 1735 size_t i;
mbedAustin 11:cada08fc8a70 1736 size_t cn_idx = 0, cn_len = strlen( cn );
mbedAustin 11:cada08fc8a70 1737
mbedAustin 11:cada08fc8a70 1738 if( name->len < 3 || name->p[0] != '*' || name->p[1] != '.' )
mbedAustin 11:cada08fc8a70 1739 return( 0 );
mbedAustin 11:cada08fc8a70 1740
mbedAustin 11:cada08fc8a70 1741 for( i = 0; i < cn_len; ++i )
mbedAustin 11:cada08fc8a70 1742 {
mbedAustin 11:cada08fc8a70 1743 if( cn[i] == '.' )
mbedAustin 11:cada08fc8a70 1744 {
mbedAustin 11:cada08fc8a70 1745 cn_idx = i;
mbedAustin 11:cada08fc8a70 1746 break;
mbedAustin 11:cada08fc8a70 1747 }
mbedAustin 11:cada08fc8a70 1748 }
mbedAustin 11:cada08fc8a70 1749
mbedAustin 11:cada08fc8a70 1750 if( cn_idx == 0 )
mbedAustin 11:cada08fc8a70 1751 return( -1 );
mbedAustin 11:cada08fc8a70 1752
mbedAustin 11:cada08fc8a70 1753 if( cn_len - cn_idx == name->len - 1 &&
mbedAustin 11:cada08fc8a70 1754 x509_memcasecmp( name->p + 1, cn + cn_idx, name->len - 1 ) == 0 )
mbedAustin 11:cada08fc8a70 1755 {
mbedAustin 11:cada08fc8a70 1756 return( 0 );
mbedAustin 11:cada08fc8a70 1757 }
mbedAustin 11:cada08fc8a70 1758
mbedAustin 11:cada08fc8a70 1759 return( -1 );
mbedAustin 11:cada08fc8a70 1760 }
mbedAustin 11:cada08fc8a70 1761
mbedAustin 11:cada08fc8a70 1762 /*
mbedAustin 11:cada08fc8a70 1763 * Compare two X.509 strings, case-insensitive, and allowing for some encoding
mbedAustin 11:cada08fc8a70 1764 * variations (but not all).
mbedAustin 11:cada08fc8a70 1765 *
mbedAustin 11:cada08fc8a70 1766 * Return 0 if equal, -1 otherwise.
mbedAustin 11:cada08fc8a70 1767 */
mbedAustin 11:cada08fc8a70 1768 static int x509_string_cmp( const mbedtls_x509_buf *a, const mbedtls_x509_buf *b )
mbedAustin 11:cada08fc8a70 1769 {
mbedAustin 11:cada08fc8a70 1770 if( a->tag == b->tag &&
mbedAustin 11:cada08fc8a70 1771 a->len == b->len &&
mbedAustin 11:cada08fc8a70 1772 memcmp( a->p, b->p, b->len ) == 0 )
mbedAustin 11:cada08fc8a70 1773 {
mbedAustin 11:cada08fc8a70 1774 return( 0 );
mbedAustin 11:cada08fc8a70 1775 }
mbedAustin 11:cada08fc8a70 1776
mbedAustin 11:cada08fc8a70 1777 if( ( a->tag == MBEDTLS_ASN1_UTF8_STRING || a->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) &&
mbedAustin 11:cada08fc8a70 1778 ( b->tag == MBEDTLS_ASN1_UTF8_STRING || b->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) &&
mbedAustin 11:cada08fc8a70 1779 a->len == b->len &&
mbedAustin 11:cada08fc8a70 1780 x509_memcasecmp( a->p, b->p, b->len ) == 0 )
mbedAustin 11:cada08fc8a70 1781 {
mbedAustin 11:cada08fc8a70 1782 return( 0 );
mbedAustin 11:cada08fc8a70 1783 }
mbedAustin 11:cada08fc8a70 1784
mbedAustin 11:cada08fc8a70 1785 return( -1 );
mbedAustin 11:cada08fc8a70 1786 }
mbedAustin 11:cada08fc8a70 1787
mbedAustin 11:cada08fc8a70 1788 /*
mbedAustin 11:cada08fc8a70 1789 * Compare two X.509 Names (aka rdnSequence).
mbedAustin 11:cada08fc8a70 1790 *
mbedAustin 11:cada08fc8a70 1791 * See RFC 5280 section 7.1, though we don't implement the whole algorithm:
mbedAustin 11:cada08fc8a70 1792 * we sometimes return unequal when the full algorithm would return equal,
mbedAustin 11:cada08fc8a70 1793 * but never the other way. (In particular, we don't do Unicode normalisation
mbedAustin 11:cada08fc8a70 1794 * or space folding.)
mbedAustin 11:cada08fc8a70 1795 *
mbedAustin 11:cada08fc8a70 1796 * Return 0 if equal, -1 otherwise.
mbedAustin 11:cada08fc8a70 1797 */
mbedAustin 11:cada08fc8a70 1798 static int x509_name_cmp( const mbedtls_x509_name *a, const mbedtls_x509_name *b )
mbedAustin 11:cada08fc8a70 1799 {
mbedAustin 11:cada08fc8a70 1800 /* Avoid recursion, it might not be optimised by the compiler */
mbedAustin 11:cada08fc8a70 1801 while( a != NULL || b != NULL )
mbedAustin 11:cada08fc8a70 1802 {
mbedAustin 11:cada08fc8a70 1803 if( a == NULL || b == NULL )
mbedAustin 11:cada08fc8a70 1804 return( -1 );
mbedAustin 11:cada08fc8a70 1805
mbedAustin 11:cada08fc8a70 1806 /* type */
mbedAustin 11:cada08fc8a70 1807 if( a->oid.tag != b->oid.tag ||
mbedAustin 11:cada08fc8a70 1808 a->oid.len != b->oid.len ||
mbedAustin 11:cada08fc8a70 1809 memcmp( a->oid.p, b->oid.p, b->oid.len ) != 0 )
mbedAustin 11:cada08fc8a70 1810 {
mbedAustin 11:cada08fc8a70 1811 return( -1 );
mbedAustin 11:cada08fc8a70 1812 }
mbedAustin 11:cada08fc8a70 1813
mbedAustin 11:cada08fc8a70 1814 /* value */
mbedAustin 11:cada08fc8a70 1815 if( x509_string_cmp( &a->val, &b->val ) != 0 )
mbedAustin 11:cada08fc8a70 1816 return( -1 );
mbedAustin 11:cada08fc8a70 1817
mbedAustin 11:cada08fc8a70 1818 /* structure of the list of sets */
mbedAustin 11:cada08fc8a70 1819 if( a->next_merged != b->next_merged )
mbedAustin 11:cada08fc8a70 1820 return( -1 );
mbedAustin 11:cada08fc8a70 1821
mbedAustin 11:cada08fc8a70 1822 a = a->next;
mbedAustin 11:cada08fc8a70 1823 b = b->next;
mbedAustin 11:cada08fc8a70 1824 }
mbedAustin 11:cada08fc8a70 1825
mbedAustin 11:cada08fc8a70 1826 /* a == NULL == b */
mbedAustin 11:cada08fc8a70 1827 return( 0 );
mbedAustin 11:cada08fc8a70 1828 }
mbedAustin 11:cada08fc8a70 1829
mbedAustin 11:cada08fc8a70 1830 /*
mbedAustin 11:cada08fc8a70 1831 * Check if 'parent' is a suitable parent (signing CA) for 'child'.
mbedAustin 11:cada08fc8a70 1832 * Return 0 if yes, -1 if not.
mbedAustin 11:cada08fc8a70 1833 *
mbedAustin 11:cada08fc8a70 1834 * top means parent is a locally-trusted certificate
mbedAustin 11:cada08fc8a70 1835 * bottom means child is the end entity cert
mbedAustin 11:cada08fc8a70 1836 */
mbedAustin 11:cada08fc8a70 1837 static int x509_crt_check_parent( const mbedtls_x509_crt *child,
mbedAustin 11:cada08fc8a70 1838 const mbedtls_x509_crt *parent,
mbedAustin 11:cada08fc8a70 1839 int top, int bottom )
mbedAustin 11:cada08fc8a70 1840 {
mbedAustin 11:cada08fc8a70 1841 int need_ca_bit;
mbedAustin 11:cada08fc8a70 1842
mbedAustin 11:cada08fc8a70 1843 /* Parent must be the issuer */
mbedAustin 11:cada08fc8a70 1844 if( x509_name_cmp( &child->issuer, &parent->subject ) != 0 )
mbedAustin 11:cada08fc8a70 1845 return( -1 );
mbedAustin 11:cada08fc8a70 1846
mbedAustin 11:cada08fc8a70 1847 /* Parent must have the basicConstraints CA bit set as a general rule */
mbedAustin 11:cada08fc8a70 1848 need_ca_bit = 1;
mbedAustin 11:cada08fc8a70 1849
mbedAustin 11:cada08fc8a70 1850 /* Exception: v1/v2 certificates that are locally trusted. */
mbedAustin 11:cada08fc8a70 1851 if( top && parent->version < 3 )
mbedAustin 11:cada08fc8a70 1852 need_ca_bit = 0;
mbedAustin 11:cada08fc8a70 1853
mbedAustin 11:cada08fc8a70 1854 /* Exception: self-signed end-entity certs that are locally trusted. */
mbedAustin 11:cada08fc8a70 1855 if( top && bottom &&
mbedAustin 11:cada08fc8a70 1856 child->raw.len == parent->raw.len &&
mbedAustin 11:cada08fc8a70 1857 memcmp( child->raw.p, parent->raw.p, child->raw.len ) == 0 )
mbedAustin 11:cada08fc8a70 1858 {
mbedAustin 11:cada08fc8a70 1859 need_ca_bit = 0;
mbedAustin 11:cada08fc8a70 1860 }
mbedAustin 11:cada08fc8a70 1861
mbedAustin 11:cada08fc8a70 1862 if( need_ca_bit && ! parent->ca_istrue )
mbedAustin 11:cada08fc8a70 1863 return( -1 );
mbedAustin 11:cada08fc8a70 1864
mbedAustin 11:cada08fc8a70 1865 #if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
mbedAustin 11:cada08fc8a70 1866 if( need_ca_bit &&
mbedAustin 11:cada08fc8a70 1867 mbedtls_x509_crt_check_key_usage( parent, MBEDTLS_X509_KU_KEY_CERT_SIGN ) != 0 )
mbedAustin 11:cada08fc8a70 1868 {
mbedAustin 11:cada08fc8a70 1869 return( -1 );
mbedAustin 11:cada08fc8a70 1870 }
mbedAustin 11:cada08fc8a70 1871 #endif
mbedAustin 11:cada08fc8a70 1872
mbedAustin 11:cada08fc8a70 1873 return( 0 );
mbedAustin 11:cada08fc8a70 1874 }
mbedAustin 11:cada08fc8a70 1875
mbedAustin 11:cada08fc8a70 1876 static int x509_crt_verify_top(
mbedAustin 11:cada08fc8a70 1877 mbedtls_x509_crt *child, mbedtls_x509_crt *trust_ca,
mbedAustin 11:cada08fc8a70 1878 mbedtls_x509_crl *ca_crl,
mbedAustin 11:cada08fc8a70 1879 const mbedtls_x509_crt_profile *profile,
mbedAustin 11:cada08fc8a70 1880 int path_cnt, int self_cnt, uint32_t *flags,
mbedAustin 11:cada08fc8a70 1881 int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
mbedAustin 11:cada08fc8a70 1882 void *p_vrfy )
mbedAustin 11:cada08fc8a70 1883 {
mbedAustin 11:cada08fc8a70 1884 int ret;
mbedAustin 11:cada08fc8a70 1885 uint32_t ca_flags = 0;
mbedAustin 11:cada08fc8a70 1886 int check_path_cnt;
mbedAustin 11:cada08fc8a70 1887 unsigned char hash[MBEDTLS_MD_MAX_SIZE];
mbedAustin 11:cada08fc8a70 1888 const mbedtls_md_info_t *md_info;
mbedAustin 11:cada08fc8a70 1889
mbedAustin 11:cada08fc8a70 1890 if( mbedtls_x509_time_is_past( &child->valid_to ) )
mbedAustin 11:cada08fc8a70 1891 *flags |= MBEDTLS_X509_BADCERT_EXPIRED;
mbedAustin 11:cada08fc8a70 1892
mbedAustin 11:cada08fc8a70 1893 if( mbedtls_x509_time_is_future( &child->valid_from ) )
mbedAustin 11:cada08fc8a70 1894 *flags |= MBEDTLS_X509_BADCERT_FUTURE;
mbedAustin 11:cada08fc8a70 1895
mbedAustin 11:cada08fc8a70 1896 if( x509_profile_check_md_alg( profile, child->sig_md ) != 0 )
mbedAustin 11:cada08fc8a70 1897 *flags |= MBEDTLS_X509_BADCERT_BAD_MD;
mbedAustin 11:cada08fc8a70 1898
mbedAustin 11:cada08fc8a70 1899 if( x509_profile_check_pk_alg( profile, child->sig_pk ) != 0 )
mbedAustin 11:cada08fc8a70 1900 *flags |= MBEDTLS_X509_BADCERT_BAD_PK;
mbedAustin 11:cada08fc8a70 1901
mbedAustin 11:cada08fc8a70 1902 /*
mbedAustin 11:cada08fc8a70 1903 * Child is the top of the chain. Check against the trust_ca list.
mbedAustin 11:cada08fc8a70 1904 */
mbedAustin 11:cada08fc8a70 1905 *flags |= MBEDTLS_X509_BADCERT_NOT_TRUSTED;
mbedAustin 11:cada08fc8a70 1906
mbedAustin 11:cada08fc8a70 1907 md_info = mbedtls_md_info_from_type( child->sig_md );
mbedAustin 11:cada08fc8a70 1908 if( md_info == NULL )
mbedAustin 11:cada08fc8a70 1909 {
mbedAustin 11:cada08fc8a70 1910 /*
mbedAustin 11:cada08fc8a70 1911 * Cannot check 'unknown', no need to try any CA
mbedAustin 11:cada08fc8a70 1912 */
mbedAustin 11:cada08fc8a70 1913 trust_ca = NULL;
mbedAustin 11:cada08fc8a70 1914 }
mbedAustin 11:cada08fc8a70 1915 else
mbedAustin 11:cada08fc8a70 1916 mbedtls_md( md_info, child->tbs.p, child->tbs.len, hash );
mbedAustin 11:cada08fc8a70 1917
mbedAustin 11:cada08fc8a70 1918 for( /* trust_ca */ ; trust_ca != NULL; trust_ca = trust_ca->next )
mbedAustin 11:cada08fc8a70 1919 {
mbedAustin 11:cada08fc8a70 1920 if( x509_crt_check_parent( child, trust_ca, 1, path_cnt == 0 ) != 0 )
mbedAustin 11:cada08fc8a70 1921 continue;
mbedAustin 11:cada08fc8a70 1922
mbedAustin 11:cada08fc8a70 1923 check_path_cnt = path_cnt + 1;
mbedAustin 11:cada08fc8a70 1924
mbedAustin 11:cada08fc8a70 1925 /*
mbedAustin 11:cada08fc8a70 1926 * Reduce check_path_cnt to check against if top of the chain is
mbedAustin 11:cada08fc8a70 1927 * the same as the trusted CA
mbedAustin 11:cada08fc8a70 1928 */
mbedAustin 11:cada08fc8a70 1929 if( child->subject_raw.len == trust_ca->subject_raw.len &&
mbedAustin 11:cada08fc8a70 1930 memcmp( child->subject_raw.p, trust_ca->subject_raw.p,
mbedAustin 11:cada08fc8a70 1931 child->issuer_raw.len ) == 0 )
mbedAustin 11:cada08fc8a70 1932 {
mbedAustin 11:cada08fc8a70 1933 check_path_cnt--;
mbedAustin 11:cada08fc8a70 1934 }
mbedAustin 11:cada08fc8a70 1935
mbedAustin 11:cada08fc8a70 1936 /* Self signed certificates do not count towards the limit */
mbedAustin 11:cada08fc8a70 1937 if( trust_ca->max_pathlen > 0 &&
mbedAustin 11:cada08fc8a70 1938 trust_ca->max_pathlen < check_path_cnt - self_cnt )
mbedAustin 11:cada08fc8a70 1939 {
mbedAustin 11:cada08fc8a70 1940 continue;
mbedAustin 11:cada08fc8a70 1941 }
mbedAustin 11:cada08fc8a70 1942
mbedAustin 11:cada08fc8a70 1943 if( mbedtls_pk_verify_ext( child->sig_pk, child->sig_opts, &trust_ca->pk,
mbedAustin 11:cada08fc8a70 1944 child->sig_md, hash, mbedtls_md_get_size( md_info ),
mbedAustin 11:cada08fc8a70 1945 child->sig.p, child->sig.len ) != 0 )
mbedAustin 11:cada08fc8a70 1946 {
mbedAustin 11:cada08fc8a70 1947 continue;
mbedAustin 11:cada08fc8a70 1948 }
mbedAustin 11:cada08fc8a70 1949
mbedAustin 11:cada08fc8a70 1950 /*
mbedAustin 11:cada08fc8a70 1951 * Top of chain is signed by a trusted CA
mbedAustin 11:cada08fc8a70 1952 */
mbedAustin 11:cada08fc8a70 1953 *flags &= ~MBEDTLS_X509_BADCERT_NOT_TRUSTED;
mbedAustin 11:cada08fc8a70 1954
mbedAustin 11:cada08fc8a70 1955 if( x509_profile_check_key( profile, child->sig_pk, &trust_ca->pk ) != 0 )
mbedAustin 11:cada08fc8a70 1956 *flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
mbedAustin 11:cada08fc8a70 1957
mbedAustin 11:cada08fc8a70 1958 break;
mbedAustin 11:cada08fc8a70 1959 }
mbedAustin 11:cada08fc8a70 1960
mbedAustin 11:cada08fc8a70 1961 /*
mbedAustin 11:cada08fc8a70 1962 * If top of chain is not the same as the trusted CA send a verify request
mbedAustin 11:cada08fc8a70 1963 * to the callback for any issues with validity and CRL presence for the
mbedAustin 11:cada08fc8a70 1964 * trusted CA certificate.
mbedAustin 11:cada08fc8a70 1965 */
mbedAustin 11:cada08fc8a70 1966 if( trust_ca != NULL &&
mbedAustin 11:cada08fc8a70 1967 ( child->subject_raw.len != trust_ca->subject_raw.len ||
mbedAustin 11:cada08fc8a70 1968 memcmp( child->subject_raw.p, trust_ca->subject_raw.p,
mbedAustin 11:cada08fc8a70 1969 child->issuer_raw.len ) != 0 ) )
mbedAustin 11:cada08fc8a70 1970 {
mbedAustin 11:cada08fc8a70 1971 #if defined(MBEDTLS_X509_CRL_PARSE_C)
mbedAustin 11:cada08fc8a70 1972 /* Check trusted CA's CRL for the chain's top crt */
mbedAustin 11:cada08fc8a70 1973 *flags |= x509_crt_verifycrl( child, trust_ca, ca_crl, profile );
mbedAustin 11:cada08fc8a70 1974 #else
mbedAustin 11:cada08fc8a70 1975 ((void) ca_crl);
mbedAustin 11:cada08fc8a70 1976 #endif
mbedAustin 11:cada08fc8a70 1977
mbedAustin 11:cada08fc8a70 1978 if( mbedtls_x509_time_is_past( &trust_ca->valid_to ) )
mbedAustin 11:cada08fc8a70 1979 ca_flags |= MBEDTLS_X509_BADCERT_EXPIRED;
mbedAustin 11:cada08fc8a70 1980
mbedAustin 11:cada08fc8a70 1981 if( mbedtls_x509_time_is_future( &trust_ca->valid_from ) )
mbedAustin 11:cada08fc8a70 1982 ca_flags |= MBEDTLS_X509_BADCERT_FUTURE;
mbedAustin 11:cada08fc8a70 1983
mbedAustin 11:cada08fc8a70 1984 if( NULL != f_vrfy )
mbedAustin 11:cada08fc8a70 1985 {
mbedAustin 11:cada08fc8a70 1986 if( ( ret = f_vrfy( p_vrfy, trust_ca, path_cnt + 1,
mbedAustin 11:cada08fc8a70 1987 &ca_flags ) ) != 0 )
mbedAustin 11:cada08fc8a70 1988 {
mbedAustin 11:cada08fc8a70 1989 return( ret );
mbedAustin 11:cada08fc8a70 1990 }
mbedAustin 11:cada08fc8a70 1991 }
mbedAustin 11:cada08fc8a70 1992 }
mbedAustin 11:cada08fc8a70 1993
mbedAustin 11:cada08fc8a70 1994 /* Call callback on top cert */
mbedAustin 11:cada08fc8a70 1995 if( NULL != f_vrfy )
mbedAustin 11:cada08fc8a70 1996 {
mbedAustin 11:cada08fc8a70 1997 if( ( ret = f_vrfy( p_vrfy, child, path_cnt, flags ) ) != 0 )
mbedAustin 11:cada08fc8a70 1998 return( ret );
mbedAustin 11:cada08fc8a70 1999 }
mbedAustin 11:cada08fc8a70 2000
mbedAustin 11:cada08fc8a70 2001 *flags |= ca_flags;
mbedAustin 11:cada08fc8a70 2002
mbedAustin 11:cada08fc8a70 2003 return( 0 );
mbedAustin 11:cada08fc8a70 2004 }
mbedAustin 11:cada08fc8a70 2005
mbedAustin 11:cada08fc8a70 2006 static int x509_crt_verify_child(
mbedAustin 11:cada08fc8a70 2007 mbedtls_x509_crt *child, mbedtls_x509_crt *parent,
mbedAustin 11:cada08fc8a70 2008 mbedtls_x509_crt *trust_ca, mbedtls_x509_crl *ca_crl,
mbedAustin 11:cada08fc8a70 2009 const mbedtls_x509_crt_profile *profile,
mbedAustin 11:cada08fc8a70 2010 int path_cnt, int self_cnt, uint32_t *flags,
mbedAustin 11:cada08fc8a70 2011 int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
mbedAustin 11:cada08fc8a70 2012 void *p_vrfy )
mbedAustin 11:cada08fc8a70 2013 {
mbedAustin 11:cada08fc8a70 2014 int ret;
mbedAustin 11:cada08fc8a70 2015 uint32_t parent_flags = 0;
mbedAustin 11:cada08fc8a70 2016 unsigned char hash[MBEDTLS_MD_MAX_SIZE];
mbedAustin 11:cada08fc8a70 2017 mbedtls_x509_crt *grandparent;
mbedAustin 11:cada08fc8a70 2018 const mbedtls_md_info_t *md_info;
mbedAustin 11:cada08fc8a70 2019
mbedAustin 11:cada08fc8a70 2020 /* Counting intermediate self signed certificates */
mbedAustin 11:cada08fc8a70 2021 if( ( path_cnt != 0 ) && x509_name_cmp( &child->issuer, &child->subject ) == 0 )
mbedAustin 11:cada08fc8a70 2022 self_cnt++;
mbedAustin 11:cada08fc8a70 2023
mbedAustin 11:cada08fc8a70 2024 /* path_cnt is 0 for the first intermediate CA */
mbedAustin 11:cada08fc8a70 2025 if( 1 + path_cnt > MBEDTLS_X509_MAX_INTERMEDIATE_CA )
mbedAustin 11:cada08fc8a70 2026 {
mbedAustin 11:cada08fc8a70 2027 *flags |= MBEDTLS_X509_BADCERT_NOT_TRUSTED;
mbedAustin 11:cada08fc8a70 2028 return( MBEDTLS_ERR_X509_CERT_VERIFY_FAILED );
mbedAustin 11:cada08fc8a70 2029 }
mbedAustin 11:cada08fc8a70 2030
mbedAustin 11:cada08fc8a70 2031 if( mbedtls_x509_time_is_past( &child->valid_to ) )
mbedAustin 11:cada08fc8a70 2032 *flags |= MBEDTLS_X509_BADCERT_EXPIRED;
mbedAustin 11:cada08fc8a70 2033
mbedAustin 11:cada08fc8a70 2034 if( mbedtls_x509_time_is_future( &child->valid_from ) )
mbedAustin 11:cada08fc8a70 2035 *flags |= MBEDTLS_X509_BADCERT_FUTURE;
mbedAustin 11:cada08fc8a70 2036
mbedAustin 11:cada08fc8a70 2037 if( x509_profile_check_md_alg( profile, child->sig_md ) != 0 )
mbedAustin 11:cada08fc8a70 2038 *flags |= MBEDTLS_X509_BADCERT_BAD_MD;
mbedAustin 11:cada08fc8a70 2039
mbedAustin 11:cada08fc8a70 2040 if( x509_profile_check_pk_alg( profile, child->sig_pk ) != 0 )
mbedAustin 11:cada08fc8a70 2041 *flags |= MBEDTLS_X509_BADCERT_BAD_PK;
mbedAustin 11:cada08fc8a70 2042
mbedAustin 11:cada08fc8a70 2043 md_info = mbedtls_md_info_from_type( child->sig_md );
mbedAustin 11:cada08fc8a70 2044 if( md_info == NULL )
mbedAustin 11:cada08fc8a70 2045 {
mbedAustin 11:cada08fc8a70 2046 /*
mbedAustin 11:cada08fc8a70 2047 * Cannot check 'unknown' hash
mbedAustin 11:cada08fc8a70 2048 */
mbedAustin 11:cada08fc8a70 2049 *flags |= MBEDTLS_X509_BADCERT_NOT_TRUSTED;
mbedAustin 11:cada08fc8a70 2050 }
mbedAustin 11:cada08fc8a70 2051 else
mbedAustin 11:cada08fc8a70 2052 {
mbedAustin 11:cada08fc8a70 2053 mbedtls_md( md_info, child->tbs.p, child->tbs.len, hash );
mbedAustin 11:cada08fc8a70 2054
mbedAustin 11:cada08fc8a70 2055 if( x509_profile_check_key( profile, child->sig_pk, &parent->pk ) != 0 )
mbedAustin 11:cada08fc8a70 2056 *flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
mbedAustin 11:cada08fc8a70 2057
mbedAustin 11:cada08fc8a70 2058 if( mbedtls_pk_verify_ext( child->sig_pk, child->sig_opts, &parent->pk,
mbedAustin 11:cada08fc8a70 2059 child->sig_md, hash, mbedtls_md_get_size( md_info ),
mbedAustin 11:cada08fc8a70 2060 child->sig.p, child->sig.len ) != 0 )
mbedAustin 11:cada08fc8a70 2061 {
mbedAustin 11:cada08fc8a70 2062 *flags |= MBEDTLS_X509_BADCERT_NOT_TRUSTED;
mbedAustin 11:cada08fc8a70 2063 }
mbedAustin 11:cada08fc8a70 2064 }
mbedAustin 11:cada08fc8a70 2065
mbedAustin 11:cada08fc8a70 2066 #if defined(MBEDTLS_X509_CRL_PARSE_C)
mbedAustin 11:cada08fc8a70 2067 /* Check trusted CA's CRL for the given crt */
mbedAustin 11:cada08fc8a70 2068 *flags |= x509_crt_verifycrl(child, parent, ca_crl, profile );
mbedAustin 11:cada08fc8a70 2069 #endif
mbedAustin 11:cada08fc8a70 2070
mbedAustin 11:cada08fc8a70 2071 /* Look for a grandparent in trusted CAs */
mbedAustin 11:cada08fc8a70 2072 for( grandparent = trust_ca;
mbedAustin 11:cada08fc8a70 2073 grandparent != NULL;
mbedAustin 11:cada08fc8a70 2074 grandparent = grandparent->next )
mbedAustin 11:cada08fc8a70 2075 {
mbedAustin 11:cada08fc8a70 2076 if( x509_crt_check_parent( parent, grandparent,
mbedAustin 11:cada08fc8a70 2077 0, path_cnt == 0 ) == 0 )
mbedAustin 11:cada08fc8a70 2078 break;
mbedAustin 11:cada08fc8a70 2079 }
mbedAustin 11:cada08fc8a70 2080
mbedAustin 11:cada08fc8a70 2081 if( grandparent != NULL )
mbedAustin 11:cada08fc8a70 2082 {
mbedAustin 11:cada08fc8a70 2083 ret = x509_crt_verify_top( parent, grandparent, ca_crl, profile,
mbedAustin 11:cada08fc8a70 2084 path_cnt + 1, self_cnt, &parent_flags, f_vrfy, p_vrfy );
mbedAustin 11:cada08fc8a70 2085 if( ret != 0 )
mbedAustin 11:cada08fc8a70 2086 return( ret );
mbedAustin 11:cada08fc8a70 2087 }
mbedAustin 11:cada08fc8a70 2088 else
mbedAustin 11:cada08fc8a70 2089 {
mbedAustin 11:cada08fc8a70 2090 /* Look for a grandparent upwards the chain */
mbedAustin 11:cada08fc8a70 2091 for( grandparent = parent->next;
mbedAustin 11:cada08fc8a70 2092 grandparent != NULL;
mbedAustin 11:cada08fc8a70 2093 grandparent = grandparent->next )
mbedAustin 11:cada08fc8a70 2094 {
mbedAustin 11:cada08fc8a70 2095 /* +2 because the current step is not yet accounted for
mbedAustin 11:cada08fc8a70 2096 * and because max_pathlen is one higher than it should be.
mbedAustin 11:cada08fc8a70 2097 * Also self signed certificates do not count to the limit. */
mbedAustin 11:cada08fc8a70 2098 if( grandparent->max_pathlen > 0 &&
mbedAustin 11:cada08fc8a70 2099 grandparent->max_pathlen < 2 + path_cnt - self_cnt )
mbedAustin 11:cada08fc8a70 2100 {
mbedAustin 11:cada08fc8a70 2101 continue;
mbedAustin 11:cada08fc8a70 2102 }
mbedAustin 11:cada08fc8a70 2103
mbedAustin 11:cada08fc8a70 2104 if( x509_crt_check_parent( parent, grandparent,
mbedAustin 11:cada08fc8a70 2105 0, path_cnt == 0 ) == 0 )
mbedAustin 11:cada08fc8a70 2106 break;
mbedAustin 11:cada08fc8a70 2107 }
mbedAustin 11:cada08fc8a70 2108
mbedAustin 11:cada08fc8a70 2109 /* Is our parent part of the chain or at the top? */
mbedAustin 11:cada08fc8a70 2110 if( grandparent != NULL )
mbedAustin 11:cada08fc8a70 2111 {
mbedAustin 11:cada08fc8a70 2112 ret = x509_crt_verify_child( parent, grandparent, trust_ca, ca_crl,
mbedAustin 11:cada08fc8a70 2113 profile, path_cnt + 1, self_cnt, &parent_flags,
mbedAustin 11:cada08fc8a70 2114 f_vrfy, p_vrfy );
mbedAustin 11:cada08fc8a70 2115 if( ret != 0 )
mbedAustin 11:cada08fc8a70 2116 return( ret );
mbedAustin 11:cada08fc8a70 2117 }
mbedAustin 11:cada08fc8a70 2118 else
mbedAustin 11:cada08fc8a70 2119 {
mbedAustin 11:cada08fc8a70 2120 ret = x509_crt_verify_top( parent, trust_ca, ca_crl, profile,
mbedAustin 11:cada08fc8a70 2121 path_cnt + 1, self_cnt, &parent_flags,
mbedAustin 11:cada08fc8a70 2122 f_vrfy, p_vrfy );
mbedAustin 11:cada08fc8a70 2123 if( ret != 0 )
mbedAustin 11:cada08fc8a70 2124 return( ret );
mbedAustin 11:cada08fc8a70 2125 }
mbedAustin 11:cada08fc8a70 2126 }
mbedAustin 11:cada08fc8a70 2127
mbedAustin 11:cada08fc8a70 2128 /* child is verified to be a child of the parent, call verify callback */
mbedAustin 11:cada08fc8a70 2129 if( NULL != f_vrfy )
mbedAustin 11:cada08fc8a70 2130 if( ( ret = f_vrfy( p_vrfy, child, path_cnt, flags ) ) != 0 )
mbedAustin 11:cada08fc8a70 2131 return( ret );
mbedAustin 11:cada08fc8a70 2132
mbedAustin 11:cada08fc8a70 2133 *flags |= parent_flags;
mbedAustin 11:cada08fc8a70 2134
mbedAustin 11:cada08fc8a70 2135 return( 0 );
mbedAustin 11:cada08fc8a70 2136 }
mbedAustin 11:cada08fc8a70 2137
mbedAustin 11:cada08fc8a70 2138 /*
mbedAustin 11:cada08fc8a70 2139 * Verify the certificate validity
mbedAustin 11:cada08fc8a70 2140 */
mbedAustin 11:cada08fc8a70 2141 int mbedtls_x509_crt_verify( mbedtls_x509_crt *crt,
mbedAustin 11:cada08fc8a70 2142 mbedtls_x509_crt *trust_ca,
mbedAustin 11:cada08fc8a70 2143 mbedtls_x509_crl *ca_crl,
mbedAustin 11:cada08fc8a70 2144 const char *cn, uint32_t *flags,
mbedAustin 11:cada08fc8a70 2145 int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
mbedAustin 11:cada08fc8a70 2146 void *p_vrfy )
mbedAustin 11:cada08fc8a70 2147 {
mbedAustin 11:cada08fc8a70 2148 return( mbedtls_x509_crt_verify_with_profile( crt, trust_ca, ca_crl,
mbedAustin 11:cada08fc8a70 2149 &mbedtls_x509_crt_profile_default, cn, flags, f_vrfy, p_vrfy ) );
mbedAustin 11:cada08fc8a70 2150 }
mbedAustin 11:cada08fc8a70 2151
mbedAustin 11:cada08fc8a70 2152
mbedAustin 11:cada08fc8a70 2153 /*
mbedAustin 11:cada08fc8a70 2154 * Verify the certificate validity, with profile
mbedAustin 11:cada08fc8a70 2155 */
mbedAustin 11:cada08fc8a70 2156 int mbedtls_x509_crt_verify_with_profile( mbedtls_x509_crt *crt,
mbedAustin 11:cada08fc8a70 2157 mbedtls_x509_crt *trust_ca,
mbedAustin 11:cada08fc8a70 2158 mbedtls_x509_crl *ca_crl,
mbedAustin 11:cada08fc8a70 2159 const mbedtls_x509_crt_profile *profile,
mbedAustin 11:cada08fc8a70 2160 const char *cn, uint32_t *flags,
mbedAustin 11:cada08fc8a70 2161 int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
mbedAustin 11:cada08fc8a70 2162 void *p_vrfy )
mbedAustin 11:cada08fc8a70 2163 {
mbedAustin 11:cada08fc8a70 2164 size_t cn_len;
mbedAustin 11:cada08fc8a70 2165 int ret;
mbedAustin 11:cada08fc8a70 2166 int pathlen = 0, selfsigned = 0;
mbedAustin 11:cada08fc8a70 2167 mbedtls_x509_crt *parent;
mbedAustin 11:cada08fc8a70 2168 mbedtls_x509_name *name;
mbedAustin 11:cada08fc8a70 2169 mbedtls_x509_sequence *cur = NULL;
mbedAustin 11:cada08fc8a70 2170 mbedtls_pk_type_t pk_type;
mbedAustin 11:cada08fc8a70 2171
mbedAustin 11:cada08fc8a70 2172 if( profile == NULL )
mbedAustin 11:cada08fc8a70 2173 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
mbedAustin 11:cada08fc8a70 2174
mbedAustin 11:cada08fc8a70 2175 *flags = 0;
mbedAustin 11:cada08fc8a70 2176
mbedAustin 11:cada08fc8a70 2177 if( cn != NULL )
mbedAustin 11:cada08fc8a70 2178 {
mbedAustin 11:cada08fc8a70 2179 name = &crt->subject;
mbedAustin 11:cada08fc8a70 2180 cn_len = strlen( cn );
mbedAustin 11:cada08fc8a70 2181
mbedAustin 11:cada08fc8a70 2182 if( crt->ext_types & MBEDTLS_X509_EXT_SUBJECT_ALT_NAME )
mbedAustin 11:cada08fc8a70 2183 {
mbedAustin 11:cada08fc8a70 2184 cur = &crt->subject_alt_names;
mbedAustin 11:cada08fc8a70 2185
mbedAustin 11:cada08fc8a70 2186 while( cur != NULL )
mbedAustin 11:cada08fc8a70 2187 {
mbedAustin 11:cada08fc8a70 2188 if( cur->buf.len == cn_len &&
mbedAustin 11:cada08fc8a70 2189 x509_memcasecmp( cn, cur->buf.p, cn_len ) == 0 )
mbedAustin 11:cada08fc8a70 2190 break;
mbedAustin 11:cada08fc8a70 2191
mbedAustin 11:cada08fc8a70 2192 if( cur->buf.len > 2 &&
mbedAustin 11:cada08fc8a70 2193 memcmp( cur->buf.p, "*.", 2 ) == 0 &&
mbedAustin 11:cada08fc8a70 2194 x509_check_wildcard( cn, &cur->buf ) == 0 )
mbedAustin 11:cada08fc8a70 2195 {
mbedAustin 11:cada08fc8a70 2196 break;
mbedAustin 11:cada08fc8a70 2197 }
mbedAustin 11:cada08fc8a70 2198
mbedAustin 11:cada08fc8a70 2199 cur = cur->next;
mbedAustin 11:cada08fc8a70 2200 }
mbedAustin 11:cada08fc8a70 2201
mbedAustin 11:cada08fc8a70 2202 if( cur == NULL )
mbedAustin 11:cada08fc8a70 2203 *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH;
mbedAustin 11:cada08fc8a70 2204 }
mbedAustin 11:cada08fc8a70 2205 else
mbedAustin 11:cada08fc8a70 2206 {
mbedAustin 11:cada08fc8a70 2207 while( name != NULL )
mbedAustin 11:cada08fc8a70 2208 {
mbedAustin 11:cada08fc8a70 2209 if( MBEDTLS_OID_CMP( MBEDTLS_OID_AT_CN, &name->oid ) == 0 )
mbedAustin 11:cada08fc8a70 2210 {
mbedAustin 11:cada08fc8a70 2211 if( name->val.len == cn_len &&
mbedAustin 11:cada08fc8a70 2212 x509_memcasecmp( name->val.p, cn, cn_len ) == 0 )
mbedAustin 11:cada08fc8a70 2213 break;
mbedAustin 11:cada08fc8a70 2214
mbedAustin 11:cada08fc8a70 2215 if( name->val.len > 2 &&
mbedAustin 11:cada08fc8a70 2216 memcmp( name->val.p, "*.", 2 ) == 0 &&
mbedAustin 11:cada08fc8a70 2217 x509_check_wildcard( cn, &name->val ) == 0 )
mbedAustin 11:cada08fc8a70 2218 break;
mbedAustin 11:cada08fc8a70 2219 }
mbedAustin 11:cada08fc8a70 2220
mbedAustin 11:cada08fc8a70 2221 name = name->next;
mbedAustin 11:cada08fc8a70 2222 }
mbedAustin 11:cada08fc8a70 2223
mbedAustin 11:cada08fc8a70 2224 if( name == NULL )
mbedAustin 11:cada08fc8a70 2225 *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH;
mbedAustin 11:cada08fc8a70 2226 }
mbedAustin 11:cada08fc8a70 2227 }
mbedAustin 11:cada08fc8a70 2228
mbedAustin 11:cada08fc8a70 2229 /* Check the type and size of the key */
mbedAustin 11:cada08fc8a70 2230 pk_type = mbedtls_pk_get_type( &crt->pk );
mbedAustin 11:cada08fc8a70 2231
mbedAustin 11:cada08fc8a70 2232 if( x509_profile_check_pk_alg( profile, pk_type ) != 0 )
mbedAustin 11:cada08fc8a70 2233 *flags |= MBEDTLS_X509_BADCERT_BAD_PK;
mbedAustin 11:cada08fc8a70 2234
mbedAustin 11:cada08fc8a70 2235 if( x509_profile_check_key( profile, pk_type, &crt->pk ) != 0 )
mbedAustin 11:cada08fc8a70 2236 *flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
mbedAustin 11:cada08fc8a70 2237
mbedAustin 11:cada08fc8a70 2238 /* Look for a parent in trusted CAs */
mbedAustin 11:cada08fc8a70 2239 for( parent = trust_ca; parent != NULL; parent = parent->next )
mbedAustin 11:cada08fc8a70 2240 {
mbedAustin 11:cada08fc8a70 2241 if( x509_crt_check_parent( crt, parent, 0, pathlen == 0 ) == 0 )
mbedAustin 11:cada08fc8a70 2242 break;
mbedAustin 11:cada08fc8a70 2243 }
mbedAustin 11:cada08fc8a70 2244
mbedAustin 11:cada08fc8a70 2245 if( parent != NULL )
mbedAustin 11:cada08fc8a70 2246 {
mbedAustin 11:cada08fc8a70 2247 ret = x509_crt_verify_top( crt, parent, ca_crl, profile,
mbedAustin 11:cada08fc8a70 2248 pathlen, selfsigned, flags, f_vrfy, p_vrfy );
mbedAustin 11:cada08fc8a70 2249 if( ret != 0 )
mbedAustin 11:cada08fc8a70 2250 return( ret );
mbedAustin 11:cada08fc8a70 2251 }
mbedAustin 11:cada08fc8a70 2252 else
mbedAustin 11:cada08fc8a70 2253 {
mbedAustin 11:cada08fc8a70 2254 /* Look for a parent upwards the chain */
mbedAustin 11:cada08fc8a70 2255 for( parent = crt->next; parent != NULL; parent = parent->next )
mbedAustin 11:cada08fc8a70 2256 {
mbedAustin 11:cada08fc8a70 2257 /* +2 because the current step is not yet accounted for
mbedAustin 11:cada08fc8a70 2258 * and because max_pathlen is one higher than it should be */
mbedAustin 11:cada08fc8a70 2259 if( parent->max_pathlen > 0 &&
mbedAustin 11:cada08fc8a70 2260 parent->max_pathlen < 2 + pathlen )
mbedAustin 11:cada08fc8a70 2261 {
mbedAustin 11:cada08fc8a70 2262 continue;
mbedAustin 11:cada08fc8a70 2263 }
mbedAustin 11:cada08fc8a70 2264
mbedAustin 11:cada08fc8a70 2265 if( x509_crt_check_parent( crt, parent, 0, pathlen == 0 ) == 0 )
mbedAustin 11:cada08fc8a70 2266 break;
mbedAustin 11:cada08fc8a70 2267 }
mbedAustin 11:cada08fc8a70 2268
mbedAustin 11:cada08fc8a70 2269 /* Are we part of the chain or at the top? */
mbedAustin 11:cada08fc8a70 2270 if( parent != NULL )
mbedAustin 11:cada08fc8a70 2271 {
mbedAustin 11:cada08fc8a70 2272 ret = x509_crt_verify_child( crt, parent, trust_ca, ca_crl, profile,
mbedAustin 11:cada08fc8a70 2273 pathlen, selfsigned, flags, f_vrfy, p_vrfy );
mbedAustin 11:cada08fc8a70 2274 if( ret != 0 )
mbedAustin 11:cada08fc8a70 2275 return( ret );
mbedAustin 11:cada08fc8a70 2276 }
mbedAustin 11:cada08fc8a70 2277 else
mbedAustin 11:cada08fc8a70 2278 {
mbedAustin 11:cada08fc8a70 2279 ret = x509_crt_verify_top( crt, trust_ca, ca_crl, profile,
mbedAustin 11:cada08fc8a70 2280 pathlen, selfsigned, flags, f_vrfy, p_vrfy );
mbedAustin 11:cada08fc8a70 2281 if( ret != 0 )
mbedAustin 11:cada08fc8a70 2282 return( ret );
mbedAustin 11:cada08fc8a70 2283 }
mbedAustin 11:cada08fc8a70 2284 }
mbedAustin 11:cada08fc8a70 2285
mbedAustin 11:cada08fc8a70 2286 if( *flags != 0 )
mbedAustin 11:cada08fc8a70 2287 return( MBEDTLS_ERR_X509_CERT_VERIFY_FAILED );
mbedAustin 11:cada08fc8a70 2288
mbedAustin 11:cada08fc8a70 2289 return( 0 );
mbedAustin 11:cada08fc8a70 2290 }
mbedAustin 11:cada08fc8a70 2291
mbedAustin 11:cada08fc8a70 2292 /*
mbedAustin 11:cada08fc8a70 2293 * Initialize a certificate chain
mbedAustin 11:cada08fc8a70 2294 */
mbedAustin 11:cada08fc8a70 2295 void mbedtls_x509_crt_init( mbedtls_x509_crt *crt )
mbedAustin 11:cada08fc8a70 2296 {
mbedAustin 11:cada08fc8a70 2297 memset( crt, 0, sizeof(mbedtls_x509_crt) );
mbedAustin 11:cada08fc8a70 2298 }
mbedAustin 11:cada08fc8a70 2299
mbedAustin 11:cada08fc8a70 2300 /*
mbedAustin 11:cada08fc8a70 2301 * Unallocate all certificate data
mbedAustin 11:cada08fc8a70 2302 */
mbedAustin 11:cada08fc8a70 2303 void mbedtls_x509_crt_free( mbedtls_x509_crt *crt )
mbedAustin 11:cada08fc8a70 2304 {
mbedAustin 11:cada08fc8a70 2305 mbedtls_x509_crt *cert_cur = crt;
mbedAustin 11:cada08fc8a70 2306 mbedtls_x509_crt *cert_prv;
mbedAustin 11:cada08fc8a70 2307 mbedtls_x509_name *name_cur;
mbedAustin 11:cada08fc8a70 2308 mbedtls_x509_name *name_prv;
mbedAustin 11:cada08fc8a70 2309 mbedtls_x509_sequence *seq_cur;
mbedAustin 11:cada08fc8a70 2310 mbedtls_x509_sequence *seq_prv;
mbedAustin 11:cada08fc8a70 2311
mbedAustin 11:cada08fc8a70 2312 if( crt == NULL )
mbedAustin 11:cada08fc8a70 2313 return;
mbedAustin 11:cada08fc8a70 2314
mbedAustin 11:cada08fc8a70 2315 do
mbedAustin 11:cada08fc8a70 2316 {
mbedAustin 11:cada08fc8a70 2317 mbedtls_pk_free( &cert_cur->pk );
mbedAustin 11:cada08fc8a70 2318
mbedAustin 11:cada08fc8a70 2319 #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
mbedAustin 11:cada08fc8a70 2320 mbedtls_free( cert_cur->sig_opts );
mbedAustin 11:cada08fc8a70 2321 #endif
mbedAustin 11:cada08fc8a70 2322
mbedAustin 11:cada08fc8a70 2323 name_cur = cert_cur->issuer.next;
mbedAustin 11:cada08fc8a70 2324 while( name_cur != NULL )
mbedAustin 11:cada08fc8a70 2325 {
mbedAustin 11:cada08fc8a70 2326 name_prv = name_cur;
mbedAustin 11:cada08fc8a70 2327 name_cur = name_cur->next;
mbedAustin 11:cada08fc8a70 2328 mbedtls_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
mbedAustin 11:cada08fc8a70 2329 mbedtls_free( name_prv );
mbedAustin 11:cada08fc8a70 2330 }
mbedAustin 11:cada08fc8a70 2331
mbedAustin 11:cada08fc8a70 2332 name_cur = cert_cur->subject.next;
mbedAustin 11:cada08fc8a70 2333 while( name_cur != NULL )
mbedAustin 11:cada08fc8a70 2334 {
mbedAustin 11:cada08fc8a70 2335 name_prv = name_cur;
mbedAustin 11:cada08fc8a70 2336 name_cur = name_cur->next;
mbedAustin 11:cada08fc8a70 2337 mbedtls_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
mbedAustin 11:cada08fc8a70 2338 mbedtls_free( name_prv );
mbedAustin 11:cada08fc8a70 2339 }
mbedAustin 11:cada08fc8a70 2340
mbedAustin 11:cada08fc8a70 2341 seq_cur = cert_cur->ext_key_usage.next;
mbedAustin 11:cada08fc8a70 2342 while( seq_cur != NULL )
mbedAustin 11:cada08fc8a70 2343 {
mbedAustin 11:cada08fc8a70 2344 seq_prv = seq_cur;
mbedAustin 11:cada08fc8a70 2345 seq_cur = seq_cur->next;
mbedAustin 11:cada08fc8a70 2346 mbedtls_zeroize( seq_prv, sizeof( mbedtls_x509_sequence ) );
mbedAustin 11:cada08fc8a70 2347 mbedtls_free( seq_prv );
mbedAustin 11:cada08fc8a70 2348 }
mbedAustin 11:cada08fc8a70 2349
mbedAustin 11:cada08fc8a70 2350 seq_cur = cert_cur->subject_alt_names.next;
mbedAustin 11:cada08fc8a70 2351 while( seq_cur != NULL )
mbedAustin 11:cada08fc8a70 2352 {
mbedAustin 11:cada08fc8a70 2353 seq_prv = seq_cur;
mbedAustin 11:cada08fc8a70 2354 seq_cur = seq_cur->next;
mbedAustin 11:cada08fc8a70 2355 mbedtls_zeroize( seq_prv, sizeof( mbedtls_x509_sequence ) );
mbedAustin 11:cada08fc8a70 2356 mbedtls_free( seq_prv );
mbedAustin 11:cada08fc8a70 2357 }
mbedAustin 11:cada08fc8a70 2358
mbedAustin 11:cada08fc8a70 2359 if( cert_cur->raw.p != NULL )
mbedAustin 11:cada08fc8a70 2360 {
mbedAustin 11:cada08fc8a70 2361 mbedtls_zeroize( cert_cur->raw.p, cert_cur->raw.len );
mbedAustin 11:cada08fc8a70 2362 mbedtls_free( cert_cur->raw.p );
mbedAustin 11:cada08fc8a70 2363 }
mbedAustin 11:cada08fc8a70 2364
mbedAustin 11:cada08fc8a70 2365 cert_cur = cert_cur->next;
mbedAustin 11:cada08fc8a70 2366 }
mbedAustin 11:cada08fc8a70 2367 while( cert_cur != NULL );
mbedAustin 11:cada08fc8a70 2368
mbedAustin 11:cada08fc8a70 2369 cert_cur = crt;
mbedAustin 11:cada08fc8a70 2370 do
mbedAustin 11:cada08fc8a70 2371 {
mbedAustin 11:cada08fc8a70 2372 cert_prv = cert_cur;
mbedAustin 11:cada08fc8a70 2373 cert_cur = cert_cur->next;
mbedAustin 11:cada08fc8a70 2374
mbedAustin 11:cada08fc8a70 2375 mbedtls_zeroize( cert_prv, sizeof( mbedtls_x509_crt ) );
mbedAustin 11:cada08fc8a70 2376 if( cert_prv != crt )
mbedAustin 11:cada08fc8a70 2377 mbedtls_free( cert_prv );
mbedAustin 11:cada08fc8a70 2378 }
mbedAustin 11:cada08fc8a70 2379 while( cert_cur != NULL );
mbedAustin 11:cada08fc8a70 2380 }
mbedAustin 11:cada08fc8a70 2381
mbedAustin 11:cada08fc8a70 2382 #endif /* MBEDTLS_X509_CRT_PARSE_C */