Timothy Beight / Mbed 2 deprecated 6_songs-from-the-cloud

This is a fork due to permission issues

Dependencies:   mbed Socket lwip-eth lwip-sys lwip

Fork of 6_songs-from-the-cloud by MakingMusicWorkshop

mbed-client/mbedtls/source/x509_crt.c@1:0ddbe2d3319c, 2016-05-19 (annotated)

Committer:
timbeight
Date:
Thu May 19 16:02:10 2016 +0000
Revision:
1:0ddbe2d3319c
Parent:
0:f7c60d3e7b8a 
This is my first commit while in the class.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
maclobdell 0:f7c60d3e7b8a 1 /*
maclobdell 0:f7c60d3e7b8a 2 * X.509 certificate parsing and verification
maclobdell 0:f7c60d3e7b8a 3 *
maclobdell 0:f7c60d3e7b8a 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
maclobdell 0:f7c60d3e7b8a 5 * SPDX-License-Identifier: Apache-2.0
maclobdell 0:f7c60d3e7b8a 6 *
maclobdell 0:f7c60d3e7b8a 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
maclobdell 0:f7c60d3e7b8a 8 * not use this file except in compliance with the License.
maclobdell 0:f7c60d3e7b8a 9 * You may obtain a copy of the License at
maclobdell 0:f7c60d3e7b8a 10 *
maclobdell 0:f7c60d3e7b8a 11 * http://www.apache.org/licenses/LICENSE-2.0
maclobdell 0:f7c60d3e7b8a 12 *
maclobdell 0:f7c60d3e7b8a 13 * Unless required by applicable law or agreed to in writing, software
maclobdell 0:f7c60d3e7b8a 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
maclobdell 0:f7c60d3e7b8a 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
maclobdell 0:f7c60d3e7b8a 16 * See the License for the specific language governing permissions and
maclobdell 0:f7c60d3e7b8a 17 * limitations under the License.
maclobdell 0:f7c60d3e7b8a 18 *
maclobdell 0:f7c60d3e7b8a 19 * This file is part of mbed TLS (https://tls.mbed.org)
maclobdell 0:f7c60d3e7b8a 20 */
maclobdell 0:f7c60d3e7b8a 21 /*
maclobdell 0:f7c60d3e7b8a 22 * The ITU-T X.509 standard defines a certificate format for PKI.
maclobdell 0:f7c60d3e7b8a 23 *
maclobdell 0:f7c60d3e7b8a 24 * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
maclobdell 0:f7c60d3e7b8a 25 * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
maclobdell 0:f7c60d3e7b8a 26 * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
maclobdell 0:f7c60d3e7b8a 27 *
maclobdell 0:f7c60d3e7b8a 28 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
maclobdell 0:f7c60d3e7b8a 29 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
maclobdell 0:f7c60d3e7b8a 30 */
maclobdell 0:f7c60d3e7b8a 31
maclobdell 0:f7c60d3e7b8a 32 #if !defined(MBEDTLS_CONFIG_FILE)
maclobdell 0:f7c60d3e7b8a 33 #include "mbedtls/config.h"
maclobdell 0:f7c60d3e7b8a 34 #else
maclobdell 0:f7c60d3e7b8a 35 #include MBEDTLS_CONFIG_FILE
maclobdell 0:f7c60d3e7b8a 36 #endif
maclobdell 0:f7c60d3e7b8a 37
maclobdell 0:f7c60d3e7b8a 38 #if defined(MBEDTLS_X509_CRT_PARSE_C)
maclobdell 0:f7c60d3e7b8a 39
maclobdell 0:f7c60d3e7b8a 40 #include "mbedtls/x509_crt.h"
maclobdell 0:f7c60d3e7b8a 41 #include "mbedtls/oid.h"
maclobdell 0:f7c60d3e7b8a 42
maclobdell 0:f7c60d3e7b8a 43 #include <stdio.h>
maclobdell 0:f7c60d3e7b8a 44 #include <string.h>
maclobdell 0:f7c60d3e7b8a 45
maclobdell 0:f7c60d3e7b8a 46 #if defined(MBEDTLS_PEM_PARSE_C)
maclobdell 0:f7c60d3e7b8a 47 #include "mbedtls/pem.h"
maclobdell 0:f7c60d3e7b8a 48 #endif
maclobdell 0:f7c60d3e7b8a 49
maclobdell 0:f7c60d3e7b8a 50 #if defined(MBEDTLS_PLATFORM_C)
maclobdell 0:f7c60d3e7b8a 51 #include "mbedtls/platform.h"
maclobdell 0:f7c60d3e7b8a 52 #else
maclobdell 0:f7c60d3e7b8a 53 #include <stdlib.h>
maclobdell 0:f7c60d3e7b8a 54 #define mbedtls_free free
maclobdell 0:f7c60d3e7b8a 55 #define mbedtls_calloc calloc
maclobdell 0:f7c60d3e7b8a 56 #define mbedtls_snprintf snprintf
maclobdell 0:f7c60d3e7b8a 57 #endif
maclobdell 0:f7c60d3e7b8a 58
maclobdell 0:f7c60d3e7b8a 59 #if defined(MBEDTLS_THREADING_C)
maclobdell 0:f7c60d3e7b8a 60 #include "mbedtls/threading.h"
maclobdell 0:f7c60d3e7b8a 61 #endif
maclobdell 0:f7c60d3e7b8a 62
maclobdell 0:f7c60d3e7b8a 63 #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
maclobdell 0:f7c60d3e7b8a 64 #include <windows.h>
maclobdell 0:f7c60d3e7b8a 65 #else
maclobdell 0:f7c60d3e7b8a 66 #include <time.h>
maclobdell 0:f7c60d3e7b8a 67 #endif
maclobdell 0:f7c60d3e7b8a 68
maclobdell 0:f7c60d3e7b8a 69 #if defined(MBEDTLS_FS_IO)
maclobdell 0:f7c60d3e7b8a 70 #include <stdio.h>
maclobdell 0:f7c60d3e7b8a 71 #if !defined(_WIN32) || defined(EFIX64) || defined(EFI32)
maclobdell 0:f7c60d3e7b8a 72 #include <sys/types.h>
maclobdell 0:f7c60d3e7b8a 73 #include <sys/stat.h>
maclobdell 0:f7c60d3e7b8a 74 #include <dirent.h>
maclobdell 0:f7c60d3e7b8a 75 #endif /* !_WIN32 || EFIX64 || EFI32 */
maclobdell 0:f7c60d3e7b8a 76 #endif
maclobdell 0:f7c60d3e7b8a 77
maclobdell 0:f7c60d3e7b8a 78 /* Implementation that should never be optimized out by the compiler */
maclobdell 0:f7c60d3e7b8a 79 static void mbedtls_zeroize( void *v, size_t n ) {
maclobdell 0:f7c60d3e7b8a 80 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
maclobdell 0:f7c60d3e7b8a 81 }
maclobdell 0:f7c60d3e7b8a 82
maclobdell 0:f7c60d3e7b8a 83 /*
maclobdell 0:f7c60d3e7b8a 84 * Default profile
maclobdell 0:f7c60d3e7b8a 85 */
maclobdell 0:f7c60d3e7b8a 86 const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_default =
maclobdell 0:f7c60d3e7b8a 87 {
maclobdell 0:f7c60d3e7b8a 88 /* Hashes from SHA-1 and above */
maclobdell 0:f7c60d3e7b8a 89 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA1 ) |
maclobdell 0:f7c60d3e7b8a 90 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_RIPEMD160 ) |
maclobdell 0:f7c60d3e7b8a 91 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA224 ) |
maclobdell 0:f7c60d3e7b8a 92 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) |
maclobdell 0:f7c60d3e7b8a 93 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ) |
maclobdell 0:f7c60d3e7b8a 94 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA512 ),
maclobdell 0:f7c60d3e7b8a 95 0xFFFFFFF, /* Any PK alg */
maclobdell 0:f7c60d3e7b8a 96 0xFFFFFFF, /* Any curve */
maclobdell 0:f7c60d3e7b8a 97 2048,
maclobdell 0:f7c60d3e7b8a 98 };
maclobdell 0:f7c60d3e7b8a 99
maclobdell 0:f7c60d3e7b8a 100 /*
maclobdell 0:f7c60d3e7b8a 101 * Next-default profile
maclobdell 0:f7c60d3e7b8a 102 */
maclobdell 0:f7c60d3e7b8a 103 const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_next =
maclobdell 0:f7c60d3e7b8a 104 {
maclobdell 0:f7c60d3e7b8a 105 /* Hashes from SHA-256 and above */
maclobdell 0:f7c60d3e7b8a 106 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) |
maclobdell 0:f7c60d3e7b8a 107 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ) |
maclobdell 0:f7c60d3e7b8a 108 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA512 ),
maclobdell 0:f7c60d3e7b8a 109 0xFFFFFFF, /* Any PK alg */
maclobdell 0:f7c60d3e7b8a 110 #if defined(MBEDTLS_ECP_C)
maclobdell 0:f7c60d3e7b8a 111 /* Curves at or above 128-bit security level */
maclobdell 0:f7c60d3e7b8a 112 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP256R1 ) |
maclobdell 0:f7c60d3e7b8a 113 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP384R1 ) |
maclobdell 0:f7c60d3e7b8a 114 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP521R1 ) |
maclobdell 0:f7c60d3e7b8a 115 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_BP256R1 ) |
maclobdell 0:f7c60d3e7b8a 116 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_BP384R1 ) |
maclobdell 0:f7c60d3e7b8a 117 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_BP512R1 ) |
maclobdell 0:f7c60d3e7b8a 118 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP256K1 ),
maclobdell 0:f7c60d3e7b8a 119 #else
maclobdell 0:f7c60d3e7b8a 120 0,
maclobdell 0:f7c60d3e7b8a 121 #endif
maclobdell 0:f7c60d3e7b8a 122 2048,
maclobdell 0:f7c60d3e7b8a 123 };
maclobdell 0:f7c60d3e7b8a 124
maclobdell 0:f7c60d3e7b8a 125 /*
maclobdell 0:f7c60d3e7b8a 126 * NSA Suite B Profile
maclobdell 0:f7c60d3e7b8a 127 */
maclobdell 0:f7c60d3e7b8a 128 const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_suiteb =
maclobdell 0:f7c60d3e7b8a 129 {
maclobdell 0:f7c60d3e7b8a 130 /* Only SHA-256 and 384 */
maclobdell 0:f7c60d3e7b8a 131 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) |
maclobdell 0:f7c60d3e7b8a 132 MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ),
maclobdell 0:f7c60d3e7b8a 133 /* Only ECDSA */
maclobdell 0:f7c60d3e7b8a 134 MBEDTLS_X509_ID_FLAG( MBEDTLS_PK_ECDSA ),
maclobdell 0:f7c60d3e7b8a 135 #if defined(MBEDTLS_ECP_C)
maclobdell 0:f7c60d3e7b8a 136 /* Only NIST P-256 and P-384 */
maclobdell 0:f7c60d3e7b8a 137 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP256R1 ) |
maclobdell 0:f7c60d3e7b8a 138 MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP384R1 ),
maclobdell 0:f7c60d3e7b8a 139 #else
maclobdell 0:f7c60d3e7b8a 140 0,
maclobdell 0:f7c60d3e7b8a 141 #endif
maclobdell 0:f7c60d3e7b8a 142 0,
maclobdell 0:f7c60d3e7b8a 143 };
maclobdell 0:f7c60d3e7b8a 144
maclobdell 0:f7c60d3e7b8a 145 /*
maclobdell 0:f7c60d3e7b8a 146 * Check md_alg against profile
maclobdell 0:f7c60d3e7b8a 147 * Return 0 if md_alg acceptable for this profile, -1 otherwise
maclobdell 0:f7c60d3e7b8a 148 */
maclobdell 0:f7c60d3e7b8a 149 static int x509_profile_check_md_alg( const mbedtls_x509_crt_profile *profile,
maclobdell 0:f7c60d3e7b8a 150 mbedtls_md_type_t md_alg )
maclobdell 0:f7c60d3e7b8a 151 {
maclobdell 0:f7c60d3e7b8a 152 if( ( profile->allowed_mds & MBEDTLS_X509_ID_FLAG( md_alg ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 153 return( 0 );
maclobdell 0:f7c60d3e7b8a 154
maclobdell 0:f7c60d3e7b8a 155 return( -1 );
maclobdell 0:f7c60d3e7b8a 156 }
maclobdell 0:f7c60d3e7b8a 157
maclobdell 0:f7c60d3e7b8a 158 /*
maclobdell 0:f7c60d3e7b8a 159 * Check pk_alg against profile
maclobdell 0:f7c60d3e7b8a 160 * Return 0 if pk_alg acceptable for this profile, -1 otherwise
maclobdell 0:f7c60d3e7b8a 161 */
maclobdell 0:f7c60d3e7b8a 162 static int x509_profile_check_pk_alg( const mbedtls_x509_crt_profile *profile,
maclobdell 0:f7c60d3e7b8a 163 mbedtls_pk_type_t pk_alg )
maclobdell 0:f7c60d3e7b8a 164 {
maclobdell 0:f7c60d3e7b8a 165 if( ( profile->allowed_pks & MBEDTLS_X509_ID_FLAG( pk_alg ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 166 return( 0 );
maclobdell 0:f7c60d3e7b8a 167
maclobdell 0:f7c60d3e7b8a 168 return( -1 );
maclobdell 0:f7c60d3e7b8a 169 }
maclobdell 0:f7c60d3e7b8a 170
maclobdell 0:f7c60d3e7b8a 171 /*
maclobdell 0:f7c60d3e7b8a 172 * Check key against profile
maclobdell 0:f7c60d3e7b8a 173 * Return 0 if pk_alg acceptable for this profile, -1 otherwise
maclobdell 0:f7c60d3e7b8a 174 */
maclobdell 0:f7c60d3e7b8a 175 static int x509_profile_check_key( const mbedtls_x509_crt_profile *profile,
maclobdell 0:f7c60d3e7b8a 176 mbedtls_pk_type_t pk_alg,
maclobdell 0:f7c60d3e7b8a 177 const mbedtls_pk_context *pk )
maclobdell 0:f7c60d3e7b8a 178 {
maclobdell 0:f7c60d3e7b8a 179 #if defined(MBEDTLS_RSA_C)
maclobdell 0:f7c60d3e7b8a 180 if( pk_alg == MBEDTLS_PK_RSA || pk_alg == MBEDTLS_PK_RSASSA_PSS )
maclobdell 0:f7c60d3e7b8a 181 {
maclobdell 0:f7c60d3e7b8a 182 if( mbedtls_pk_get_bitlen( pk ) >= profile->rsa_min_bitlen )
maclobdell 0:f7c60d3e7b8a 183 return( 0 );
maclobdell 0:f7c60d3e7b8a 184
maclobdell 0:f7c60d3e7b8a 185 return( -1 );
maclobdell 0:f7c60d3e7b8a 186 }
maclobdell 0:f7c60d3e7b8a 187 #endif
maclobdell 0:f7c60d3e7b8a 188
maclobdell 0:f7c60d3e7b8a 189 #if defined(MBEDTLS_ECP_C)
maclobdell 0:f7c60d3e7b8a 190 if( pk_alg == MBEDTLS_PK_ECDSA ||
maclobdell 0:f7c60d3e7b8a 191 pk_alg == MBEDTLS_PK_ECKEY ||
maclobdell 0:f7c60d3e7b8a 192 pk_alg == MBEDTLS_PK_ECKEY_DH )
maclobdell 0:f7c60d3e7b8a 193 {
maclobdell 0:f7c60d3e7b8a 194 mbedtls_ecp_group_id gid = mbedtls_pk_ec( *pk )->grp.id;
maclobdell 0:f7c60d3e7b8a 195
maclobdell 0:f7c60d3e7b8a 196 if( ( profile->allowed_curves & MBEDTLS_X509_ID_FLAG( gid ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 197 return( 0 );
maclobdell 0:f7c60d3e7b8a 198
maclobdell 0:f7c60d3e7b8a 199 return( -1 );
maclobdell 0:f7c60d3e7b8a 200 }
maclobdell 0:f7c60d3e7b8a 201 #endif
maclobdell 0:f7c60d3e7b8a 202
maclobdell 0:f7c60d3e7b8a 203 return( -1 );
maclobdell 0:f7c60d3e7b8a 204 }
maclobdell 0:f7c60d3e7b8a 205
maclobdell 0:f7c60d3e7b8a 206 /*
maclobdell 0:f7c60d3e7b8a 207 * Version ::= INTEGER { v1(0), v2(1), v3(2) }
maclobdell 0:f7c60d3e7b8a 208 */
maclobdell 0:f7c60d3e7b8a 209 static int x509_get_version( unsigned char **p,
maclobdell 0:f7c60d3e7b8a 210 const unsigned char *end,
maclobdell 0:f7c60d3e7b8a 211 int *ver )
maclobdell 0:f7c60d3e7b8a 212 {
maclobdell 0:f7c60d3e7b8a 213 int ret;
maclobdell 0:f7c60d3e7b8a 214 size_t len;
maclobdell 0:f7c60d3e7b8a 215
maclobdell 0:f7c60d3e7b8a 216 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
maclobdell 0:f7c60d3e7b8a 217 MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0 ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 218 {
maclobdell 0:f7c60d3e7b8a 219 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
maclobdell 0:f7c60d3e7b8a 220 {
maclobdell 0:f7c60d3e7b8a 221 *ver = 0;
maclobdell 0:f7c60d3e7b8a 222 return( 0 );
maclobdell 0:f7c60d3e7b8a 223 }
maclobdell 0:f7c60d3e7b8a 224
maclobdell 0:f7c60d3e7b8a 225 return( ret );
maclobdell 0:f7c60d3e7b8a 226 }
maclobdell 0:f7c60d3e7b8a 227
maclobdell 0:f7c60d3e7b8a 228 end = *p + len;
maclobdell 0:f7c60d3e7b8a 229
maclobdell 0:f7c60d3e7b8a 230 if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 231 return( MBEDTLS_ERR_X509_INVALID_VERSION + ret );
maclobdell 0:f7c60d3e7b8a 232
maclobdell 0:f7c60d3e7b8a 233 if( *p != end )
maclobdell 0:f7c60d3e7b8a 234 return( MBEDTLS_ERR_X509_INVALID_VERSION +
maclobdell 0:f7c60d3e7b8a 235 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
maclobdell 0:f7c60d3e7b8a 236
maclobdell 0:f7c60d3e7b8a 237 return( 0 );
maclobdell 0:f7c60d3e7b8a 238 }
maclobdell 0:f7c60d3e7b8a 239
maclobdell 0:f7c60d3e7b8a 240 /*
maclobdell 0:f7c60d3e7b8a 241 * Validity ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 242 * notBefore Time,
maclobdell 0:f7c60d3e7b8a 243 * notAfter Time }
maclobdell 0:f7c60d3e7b8a 244 */
maclobdell 0:f7c60d3e7b8a 245 static int x509_get_dates( unsigned char **p,
maclobdell 0:f7c60d3e7b8a 246 const unsigned char *end,
maclobdell 0:f7c60d3e7b8a 247 mbedtls_x509_time *from,
maclobdell 0:f7c60d3e7b8a 248 mbedtls_x509_time *to )
maclobdell 0:f7c60d3e7b8a 249 {
maclobdell 0:f7c60d3e7b8a 250 int ret;
maclobdell 0:f7c60d3e7b8a 251 size_t len;
maclobdell 0:f7c60d3e7b8a 252
maclobdell 0:f7c60d3e7b8a 253 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
maclobdell 0:f7c60d3e7b8a 254 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 255 return( MBEDTLS_ERR_X509_INVALID_DATE + ret );
maclobdell 0:f7c60d3e7b8a 256
maclobdell 0:f7c60d3e7b8a 257 end = *p + len;
maclobdell 0:f7c60d3e7b8a 258
maclobdell 0:f7c60d3e7b8a 259 if( ( ret = mbedtls_x509_get_time( p, end, from ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 260 return( ret );
maclobdell 0:f7c60d3e7b8a 261
maclobdell 0:f7c60d3e7b8a 262 if( ( ret = mbedtls_x509_get_time( p, end, to ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 263 return( ret );
maclobdell 0:f7c60d3e7b8a 264
maclobdell 0:f7c60d3e7b8a 265 if( *p != end )
maclobdell 0:f7c60d3e7b8a 266 return( MBEDTLS_ERR_X509_INVALID_DATE +
maclobdell 0:f7c60d3e7b8a 267 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
maclobdell 0:f7c60d3e7b8a 268
maclobdell 0:f7c60d3e7b8a 269 return( 0 );
maclobdell 0:f7c60d3e7b8a 270 }
maclobdell 0:f7c60d3e7b8a 271
maclobdell 0:f7c60d3e7b8a 272 /*
maclobdell 0:f7c60d3e7b8a 273 * X.509 v2/v3 unique identifier (not parsed)
maclobdell 0:f7c60d3e7b8a 274 */
maclobdell 0:f7c60d3e7b8a 275 static int x509_get_uid( unsigned char **p,
maclobdell 0:f7c60d3e7b8a 276 const unsigned char *end,
maclobdell 0:f7c60d3e7b8a 277 mbedtls_x509_buf *uid, int n )
maclobdell 0:f7c60d3e7b8a 278 {
maclobdell 0:f7c60d3e7b8a 279 int ret;
maclobdell 0:f7c60d3e7b8a 280
maclobdell 0:f7c60d3e7b8a 281 if( *p == end )
maclobdell 0:f7c60d3e7b8a 282 return( 0 );
maclobdell 0:f7c60d3e7b8a 283
maclobdell 0:f7c60d3e7b8a 284 uid->tag = **p;
maclobdell 0:f7c60d3e7b8a 285
maclobdell 0:f7c60d3e7b8a 286 if( ( ret = mbedtls_asn1_get_tag( p, end, &uid->len,
maclobdell 0:f7c60d3e7b8a 287 MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | n ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 288 {
maclobdell 0:f7c60d3e7b8a 289 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
maclobdell 0:f7c60d3e7b8a 290 return( 0 );
maclobdell 0:f7c60d3e7b8a 291
maclobdell 0:f7c60d3e7b8a 292 return( ret );
maclobdell 0:f7c60d3e7b8a 293 }
maclobdell 0:f7c60d3e7b8a 294
maclobdell 0:f7c60d3e7b8a 295 uid->p = *p;
maclobdell 0:f7c60d3e7b8a 296 *p += uid->len;
maclobdell 0:f7c60d3e7b8a 297
maclobdell 0:f7c60d3e7b8a 298 return( 0 );
maclobdell 0:f7c60d3e7b8a 299 }
maclobdell 0:f7c60d3e7b8a 300
maclobdell 0:f7c60d3e7b8a 301 static int x509_get_basic_constraints( unsigned char **p,
maclobdell 0:f7c60d3e7b8a 302 const unsigned char *end,
maclobdell 0:f7c60d3e7b8a 303 int *ca_istrue,
maclobdell 0:f7c60d3e7b8a 304 int *max_pathlen )
maclobdell 0:f7c60d3e7b8a 305 {
maclobdell 0:f7c60d3e7b8a 306 int ret;
maclobdell 0:f7c60d3e7b8a 307 size_t len;
maclobdell 0:f7c60d3e7b8a 308
maclobdell 0:f7c60d3e7b8a 309 /*
maclobdell 0:f7c60d3e7b8a 310 * BasicConstraints ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 311 * cA BOOLEAN DEFAULT FALSE,
maclobdell 0:f7c60d3e7b8a 312 * pathLenConstraint INTEGER (0..MAX) OPTIONAL }
maclobdell 0:f7c60d3e7b8a 313 */
maclobdell 0:f7c60d3e7b8a 314 *ca_istrue = 0; /* DEFAULT FALSE */
maclobdell 0:f7c60d3e7b8a 315 *max_pathlen = 0; /* endless */
maclobdell 0:f7c60d3e7b8a 316
maclobdell 0:f7c60d3e7b8a 317 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
maclobdell 0:f7c60d3e7b8a 318 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 319 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
maclobdell 0:f7c60d3e7b8a 320
maclobdell 0:f7c60d3e7b8a 321 if( *p == end )
maclobdell 0:f7c60d3e7b8a 322 return( 0 );
maclobdell 0:f7c60d3e7b8a 323
maclobdell 0:f7c60d3e7b8a 324 if( ( ret = mbedtls_asn1_get_bool( p, end, ca_istrue ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 325 {
maclobdell 0:f7c60d3e7b8a 326 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
maclobdell 0:f7c60d3e7b8a 327 ret = mbedtls_asn1_get_int( p, end, ca_istrue );
maclobdell 0:f7c60d3e7b8a 328
maclobdell 0:f7c60d3e7b8a 329 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 330 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
maclobdell 0:f7c60d3e7b8a 331
maclobdell 0:f7c60d3e7b8a 332 if( *ca_istrue != 0 )
maclobdell 0:f7c60d3e7b8a 333 *ca_istrue = 1;
maclobdell 0:f7c60d3e7b8a 334 }
maclobdell 0:f7c60d3e7b8a 335
maclobdell 0:f7c60d3e7b8a 336 if( *p == end )
maclobdell 0:f7c60d3e7b8a 337 return( 0 );
maclobdell 0:f7c60d3e7b8a 338
maclobdell 0:f7c60d3e7b8a 339 if( ( ret = mbedtls_asn1_get_int( p, end, max_pathlen ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 340 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
maclobdell 0:f7c60d3e7b8a 341
maclobdell 0:f7c60d3e7b8a 342 if( *p != end )
maclobdell 0:f7c60d3e7b8a 343 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 344 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
maclobdell 0:f7c60d3e7b8a 345
maclobdell 0:f7c60d3e7b8a 346 (*max_pathlen)++;
maclobdell 0:f7c60d3e7b8a 347
maclobdell 0:f7c60d3e7b8a 348 return( 0 );
maclobdell 0:f7c60d3e7b8a 349 }
maclobdell 0:f7c60d3e7b8a 350
maclobdell 0:f7c60d3e7b8a 351 static int x509_get_ns_cert_type( unsigned char **p,
maclobdell 0:f7c60d3e7b8a 352 const unsigned char *end,
maclobdell 0:f7c60d3e7b8a 353 unsigned char *ns_cert_type)
maclobdell 0:f7c60d3e7b8a 354 {
maclobdell 0:f7c60d3e7b8a 355 int ret;
maclobdell 0:f7c60d3e7b8a 356 mbedtls_x509_bitstring bs = { 0, 0, NULL };
maclobdell 0:f7c60d3e7b8a 357
maclobdell 0:f7c60d3e7b8a 358 if( ( ret = mbedtls_asn1_get_bitstring( p, end, &bs ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 359 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
maclobdell 0:f7c60d3e7b8a 360
maclobdell 0:f7c60d3e7b8a 361 if( bs.len != 1 )
maclobdell 0:f7c60d3e7b8a 362 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 363 MBEDTLS_ERR_ASN1_INVALID_LENGTH );
maclobdell 0:f7c60d3e7b8a 364
maclobdell 0:f7c60d3e7b8a 365 /* Get actual bitstring */
maclobdell 0:f7c60d3e7b8a 366 *ns_cert_type = *bs.p;
maclobdell 0:f7c60d3e7b8a 367 return( 0 );
maclobdell 0:f7c60d3e7b8a 368 }
maclobdell 0:f7c60d3e7b8a 369
maclobdell 0:f7c60d3e7b8a 370 static int x509_get_key_usage( unsigned char **p,
maclobdell 0:f7c60d3e7b8a 371 const unsigned char *end,
maclobdell 0:f7c60d3e7b8a 372 unsigned int *key_usage)
maclobdell 0:f7c60d3e7b8a 373 {
maclobdell 0:f7c60d3e7b8a 374 int ret;
maclobdell 0:f7c60d3e7b8a 375 size_t i;
maclobdell 0:f7c60d3e7b8a 376 mbedtls_x509_bitstring bs = { 0, 0, NULL };
maclobdell 0:f7c60d3e7b8a 377
maclobdell 0:f7c60d3e7b8a 378 if( ( ret = mbedtls_asn1_get_bitstring( p, end, &bs ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 379 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
maclobdell 0:f7c60d3e7b8a 380
maclobdell 0:f7c60d3e7b8a 381 if( bs.len < 1 )
maclobdell 0:f7c60d3e7b8a 382 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 383 MBEDTLS_ERR_ASN1_INVALID_LENGTH );
maclobdell 0:f7c60d3e7b8a 384
maclobdell 0:f7c60d3e7b8a 385 /* Get actual bitstring */
maclobdell 0:f7c60d3e7b8a 386 *key_usage = 0;
maclobdell 0:f7c60d3e7b8a 387 for( i = 0; i < bs.len && i < sizeof( unsigned int ); i++ )
maclobdell 0:f7c60d3e7b8a 388 {
maclobdell 0:f7c60d3e7b8a 389 *key_usage |= (unsigned int) bs.p[i] << (8*i);
maclobdell 0:f7c60d3e7b8a 390 }
maclobdell 0:f7c60d3e7b8a 391
maclobdell 0:f7c60d3e7b8a 392 return( 0 );
maclobdell 0:f7c60d3e7b8a 393 }
maclobdell 0:f7c60d3e7b8a 394
maclobdell 0:f7c60d3e7b8a 395 /*
maclobdell 0:f7c60d3e7b8a 396 * ExtKeyUsageSyntax ::= SEQUENCE SIZE (1..MAX) OF KeyPurposeId
maclobdell 0:f7c60d3e7b8a 397 *
maclobdell 0:f7c60d3e7b8a 398 * KeyPurposeId ::= OBJECT IDENTIFIER
maclobdell 0:f7c60d3e7b8a 399 */
maclobdell 0:f7c60d3e7b8a 400 static int x509_get_ext_key_usage( unsigned char **p,
maclobdell 0:f7c60d3e7b8a 401 const unsigned char *end,
maclobdell 0:f7c60d3e7b8a 402 mbedtls_x509_sequence *ext_key_usage)
maclobdell 0:f7c60d3e7b8a 403 {
maclobdell 0:f7c60d3e7b8a 404 int ret;
maclobdell 0:f7c60d3e7b8a 405
maclobdell 0:f7c60d3e7b8a 406 if( ( ret = mbedtls_asn1_get_sequence_of( p, end, ext_key_usage, MBEDTLS_ASN1_OID ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 407 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
maclobdell 0:f7c60d3e7b8a 408
maclobdell 0:f7c60d3e7b8a 409 /* Sequence length must be >= 1 */
maclobdell 0:f7c60d3e7b8a 410 if( ext_key_usage->buf.p == NULL )
maclobdell 0:f7c60d3e7b8a 411 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 412 MBEDTLS_ERR_ASN1_INVALID_LENGTH );
maclobdell 0:f7c60d3e7b8a 413
maclobdell 0:f7c60d3e7b8a 414 return( 0 );
maclobdell 0:f7c60d3e7b8a 415 }
maclobdell 0:f7c60d3e7b8a 416
maclobdell 0:f7c60d3e7b8a 417 /*
maclobdell 0:f7c60d3e7b8a 418 * SubjectAltName ::= GeneralNames
maclobdell 0:f7c60d3e7b8a 419 *
maclobdell 0:f7c60d3e7b8a 420 * GeneralNames ::= SEQUENCE SIZE (1..MAX) OF GeneralName
maclobdell 0:f7c60d3e7b8a 421 *
maclobdell 0:f7c60d3e7b8a 422 * GeneralName ::= CHOICE {
maclobdell 0:f7c60d3e7b8a 423 * otherName [0] OtherName,
maclobdell 0:f7c60d3e7b8a 424 * rfc822Name [1] IA5String,
maclobdell 0:f7c60d3e7b8a 425 * dNSName [2] IA5String,
maclobdell 0:f7c60d3e7b8a 426 * x400Address [3] ORAddress,
maclobdell 0:f7c60d3e7b8a 427 * directoryName [4] Name,
maclobdell 0:f7c60d3e7b8a 428 * ediPartyName [5] EDIPartyName,
maclobdell 0:f7c60d3e7b8a 429 * uniformResourceIdentifier [6] IA5String,
maclobdell 0:f7c60d3e7b8a 430 * iPAddress [7] OCTET STRING,
maclobdell 0:f7c60d3e7b8a 431 * registeredID [8] OBJECT IDENTIFIER }
maclobdell 0:f7c60d3e7b8a 432 *
maclobdell 0:f7c60d3e7b8a 433 * OtherName ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 434 * type-id OBJECT IDENTIFIER,
maclobdell 0:f7c60d3e7b8a 435 * value [0] EXPLICIT ANY DEFINED BY type-id }
maclobdell 0:f7c60d3e7b8a 436 *
maclobdell 0:f7c60d3e7b8a 437 * EDIPartyName ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 438 * nameAssigner [0] DirectoryString OPTIONAL,
maclobdell 0:f7c60d3e7b8a 439 * partyName [1] DirectoryString }
maclobdell 0:f7c60d3e7b8a 440 *
maclobdell 0:f7c60d3e7b8a 441 * NOTE: we only parse and use dNSName at this point.
maclobdell 0:f7c60d3e7b8a 442 */
maclobdell 0:f7c60d3e7b8a 443 static int x509_get_subject_alt_name( unsigned char **p,
maclobdell 0:f7c60d3e7b8a 444 const unsigned char *end,
maclobdell 0:f7c60d3e7b8a 445 mbedtls_x509_sequence *subject_alt_name )
maclobdell 0:f7c60d3e7b8a 446 {
maclobdell 0:f7c60d3e7b8a 447 int ret;
maclobdell 0:f7c60d3e7b8a 448 size_t len, tag_len;
maclobdell 0:f7c60d3e7b8a 449 mbedtls_asn1_buf *buf;
maclobdell 0:f7c60d3e7b8a 450 unsigned char tag;
maclobdell 0:f7c60d3e7b8a 451 mbedtls_asn1_sequence *cur = subject_alt_name;
maclobdell 0:f7c60d3e7b8a 452
maclobdell 0:f7c60d3e7b8a 453 /* Get main sequence tag */
maclobdell 0:f7c60d3e7b8a 454 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
maclobdell 0:f7c60d3e7b8a 455 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 456 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
maclobdell 0:f7c60d3e7b8a 457
maclobdell 0:f7c60d3e7b8a 458 if( *p + len != end )
maclobdell 0:f7c60d3e7b8a 459 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 460 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
maclobdell 0:f7c60d3e7b8a 461
maclobdell 0:f7c60d3e7b8a 462 while( *p < end )
maclobdell 0:f7c60d3e7b8a 463 {
maclobdell 0:f7c60d3e7b8a 464 if( ( end - *p ) < 1 )
maclobdell 0:f7c60d3e7b8a 465 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 466 MBEDTLS_ERR_ASN1_OUT_OF_DATA );
maclobdell 0:f7c60d3e7b8a 467
maclobdell 0:f7c60d3e7b8a 468 tag = **p;
maclobdell 0:f7c60d3e7b8a 469 (*p)++;
maclobdell 0:f7c60d3e7b8a 470 if( ( ret = mbedtls_asn1_get_len( p, end, &tag_len ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 471 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
maclobdell 0:f7c60d3e7b8a 472
maclobdell 0:f7c60d3e7b8a 473 if( ( tag & MBEDTLS_ASN1_CONTEXT_SPECIFIC ) != MBEDTLS_ASN1_CONTEXT_SPECIFIC )
maclobdell 0:f7c60d3e7b8a 474 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 475 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
maclobdell 0:f7c60d3e7b8a 476
maclobdell 0:f7c60d3e7b8a 477 /* Skip everything but DNS name */
maclobdell 0:f7c60d3e7b8a 478 if( tag != ( MBEDTLS_ASN1_CONTEXT_SPECIFIC | 2 ) )
maclobdell 0:f7c60d3e7b8a 479 {
maclobdell 0:f7c60d3e7b8a 480 *p += tag_len;
maclobdell 0:f7c60d3e7b8a 481 continue;
maclobdell 0:f7c60d3e7b8a 482 }
maclobdell 0:f7c60d3e7b8a 483
maclobdell 0:f7c60d3e7b8a 484 /* Allocate and assign next pointer */
maclobdell 0:f7c60d3e7b8a 485 if( cur->buf.p != NULL )
maclobdell 0:f7c60d3e7b8a 486 {
maclobdell 0:f7c60d3e7b8a 487 if( cur->next != NULL )
maclobdell 0:f7c60d3e7b8a 488 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS );
maclobdell 0:f7c60d3e7b8a 489
maclobdell 0:f7c60d3e7b8a 490 cur->next = mbedtls_calloc( 1, sizeof( mbedtls_asn1_sequence ) );
maclobdell 0:f7c60d3e7b8a 491
maclobdell 0:f7c60d3e7b8a 492 if( cur->next == NULL )
maclobdell 0:f7c60d3e7b8a 493 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 494 MBEDTLS_ERR_ASN1_ALLOC_FAILED );
maclobdell 0:f7c60d3e7b8a 495
maclobdell 0:f7c60d3e7b8a 496 cur = cur->next;
maclobdell 0:f7c60d3e7b8a 497 }
maclobdell 0:f7c60d3e7b8a 498
maclobdell 0:f7c60d3e7b8a 499 buf = &(cur->buf);
maclobdell 0:f7c60d3e7b8a 500 buf->tag = tag;
maclobdell 0:f7c60d3e7b8a 501 buf->p = *p;
maclobdell 0:f7c60d3e7b8a 502 buf->len = tag_len;
maclobdell 0:f7c60d3e7b8a 503 *p += buf->len;
maclobdell 0:f7c60d3e7b8a 504 }
maclobdell 0:f7c60d3e7b8a 505
maclobdell 0:f7c60d3e7b8a 506 /* Set final sequence entry's next pointer to NULL */
maclobdell 0:f7c60d3e7b8a 507 cur->next = NULL;
maclobdell 0:f7c60d3e7b8a 508
maclobdell 0:f7c60d3e7b8a 509 if( *p != end )
maclobdell 0:f7c60d3e7b8a 510 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 511 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
maclobdell 0:f7c60d3e7b8a 512
maclobdell 0:f7c60d3e7b8a 513 return( 0 );
maclobdell 0:f7c60d3e7b8a 514 }
maclobdell 0:f7c60d3e7b8a 515
maclobdell 0:f7c60d3e7b8a 516 /*
maclobdell 0:f7c60d3e7b8a 517 * X.509 v3 extensions
maclobdell 0:f7c60d3e7b8a 518 *
maclobdell 0:f7c60d3e7b8a 519 * TODO: Perform all of the basic constraints tests required by the RFC
maclobdell 0:f7c60d3e7b8a 520 * TODO: Set values for undetected extensions to a sane default?
maclobdell 0:f7c60d3e7b8a 521 *
maclobdell 0:f7c60d3e7b8a 522 */
maclobdell 0:f7c60d3e7b8a 523 static int x509_get_crt_ext( unsigned char **p,
maclobdell 0:f7c60d3e7b8a 524 const unsigned char *end,
maclobdell 0:f7c60d3e7b8a 525 mbedtls_x509_crt *crt )
maclobdell 0:f7c60d3e7b8a 526 {
maclobdell 0:f7c60d3e7b8a 527 int ret;
maclobdell 0:f7c60d3e7b8a 528 size_t len;
maclobdell 0:f7c60d3e7b8a 529 unsigned char *end_ext_data, *end_ext_octet;
maclobdell 0:f7c60d3e7b8a 530
maclobdell 0:f7c60d3e7b8a 531 if( ( ret = mbedtls_x509_get_ext( p, end, &crt->v3_ext, 3 ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 532 {
maclobdell 0:f7c60d3e7b8a 533 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
maclobdell 0:f7c60d3e7b8a 534 return( 0 );
maclobdell 0:f7c60d3e7b8a 535
maclobdell 0:f7c60d3e7b8a 536 return( ret );
maclobdell 0:f7c60d3e7b8a 537 }
maclobdell 0:f7c60d3e7b8a 538
maclobdell 0:f7c60d3e7b8a 539 while( *p < end )
maclobdell 0:f7c60d3e7b8a 540 {
maclobdell 0:f7c60d3e7b8a 541 /*
maclobdell 0:f7c60d3e7b8a 542 * Extension ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 543 * extnID OBJECT IDENTIFIER,
maclobdell 0:f7c60d3e7b8a 544 * critical BOOLEAN DEFAULT FALSE,
maclobdell 0:f7c60d3e7b8a 545 * extnValue OCTET STRING }
maclobdell 0:f7c60d3e7b8a 546 */
maclobdell 0:f7c60d3e7b8a 547 mbedtls_x509_buf extn_oid = {0, 0, NULL};
maclobdell 0:f7c60d3e7b8a 548 int is_critical = 0; /* DEFAULT FALSE */
maclobdell 0:f7c60d3e7b8a 549 int ext_type = 0;
maclobdell 0:f7c60d3e7b8a 550
maclobdell 0:f7c60d3e7b8a 551 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
maclobdell 0:f7c60d3e7b8a 552 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 553 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
maclobdell 0:f7c60d3e7b8a 554
maclobdell 0:f7c60d3e7b8a 555 end_ext_data = *p + len;
maclobdell 0:f7c60d3e7b8a 556
maclobdell 0:f7c60d3e7b8a 557 /* Get extension ID */
maclobdell 0:f7c60d3e7b8a 558 extn_oid.tag = **p;
maclobdell 0:f7c60d3e7b8a 559
maclobdell 0:f7c60d3e7b8a 560 if( ( ret = mbedtls_asn1_get_tag( p, end, &extn_oid.len, MBEDTLS_ASN1_OID ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 561 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
maclobdell 0:f7c60d3e7b8a 562
maclobdell 0:f7c60d3e7b8a 563 extn_oid.p = *p;
maclobdell 0:f7c60d3e7b8a 564 *p += extn_oid.len;
maclobdell 0:f7c60d3e7b8a 565
maclobdell 0:f7c60d3e7b8a 566 if( ( end - *p ) < 1 )
maclobdell 0:f7c60d3e7b8a 567 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 568 MBEDTLS_ERR_ASN1_OUT_OF_DATA );
maclobdell 0:f7c60d3e7b8a 569
maclobdell 0:f7c60d3e7b8a 570 /* Get optional critical */
maclobdell 0:f7c60d3e7b8a 571 if( ( ret = mbedtls_asn1_get_bool( p, end_ext_data, &is_critical ) ) != 0 &&
maclobdell 0:f7c60d3e7b8a 572 ( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) )
maclobdell 0:f7c60d3e7b8a 573 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
maclobdell 0:f7c60d3e7b8a 574
maclobdell 0:f7c60d3e7b8a 575 /* Data should be octet string type */
maclobdell 0:f7c60d3e7b8a 576 if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len,
maclobdell 0:f7c60d3e7b8a 577 MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 578 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
maclobdell 0:f7c60d3e7b8a 579
maclobdell 0:f7c60d3e7b8a 580 end_ext_octet = *p + len;
maclobdell 0:f7c60d3e7b8a 581
maclobdell 0:f7c60d3e7b8a 582 if( end_ext_octet != end_ext_data )
maclobdell 0:f7c60d3e7b8a 583 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 584 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
maclobdell 0:f7c60d3e7b8a 585
maclobdell 0:f7c60d3e7b8a 586 /*
maclobdell 0:f7c60d3e7b8a 587 * Detect supported extensions
maclobdell 0:f7c60d3e7b8a 588 */
maclobdell 0:f7c60d3e7b8a 589 ret = mbedtls_oid_get_x509_ext_type( &extn_oid, &ext_type );
maclobdell 0:f7c60d3e7b8a 590
maclobdell 0:f7c60d3e7b8a 591 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 592 {
maclobdell 0:f7c60d3e7b8a 593 /* No parser found, skip extension */
maclobdell 0:f7c60d3e7b8a 594 *p = end_ext_octet;
maclobdell 0:f7c60d3e7b8a 595
maclobdell 0:f7c60d3e7b8a 596 #if !defined(MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION)
maclobdell 0:f7c60d3e7b8a 597 if( is_critical )
maclobdell 0:f7c60d3e7b8a 598 {
maclobdell 0:f7c60d3e7b8a 599 /* Data is marked as critical: fail */
maclobdell 0:f7c60d3e7b8a 600 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 601 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
maclobdell 0:f7c60d3e7b8a 602 }
maclobdell 0:f7c60d3e7b8a 603 #endif
maclobdell 0:f7c60d3e7b8a 604 continue;
maclobdell 0:f7c60d3e7b8a 605 }
maclobdell 0:f7c60d3e7b8a 606
maclobdell 0:f7c60d3e7b8a 607 /* Forbid repeated extensions */
maclobdell 0:f7c60d3e7b8a 608 if( ( crt->ext_types & ext_type ) != 0 )
maclobdell 0:f7c60d3e7b8a 609 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS );
maclobdell 0:f7c60d3e7b8a 610
maclobdell 0:f7c60d3e7b8a 611 crt->ext_types |= ext_type;
maclobdell 0:f7c60d3e7b8a 612
maclobdell 0:f7c60d3e7b8a 613 switch( ext_type )
maclobdell 0:f7c60d3e7b8a 614 {
maclobdell 0:f7c60d3e7b8a 615 case MBEDTLS_X509_EXT_BASIC_CONSTRAINTS:
maclobdell 0:f7c60d3e7b8a 616 /* Parse basic constraints */
maclobdell 0:f7c60d3e7b8a 617 if( ( ret = x509_get_basic_constraints( p, end_ext_octet,
maclobdell 0:f7c60d3e7b8a 618 &crt->ca_istrue, &crt->max_pathlen ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 619 return( ret );
maclobdell 0:f7c60d3e7b8a 620 break;
maclobdell 0:f7c60d3e7b8a 621
maclobdell 0:f7c60d3e7b8a 622 case MBEDTLS_X509_EXT_KEY_USAGE:
maclobdell 0:f7c60d3e7b8a 623 /* Parse key usage */
maclobdell 0:f7c60d3e7b8a 624 if( ( ret = x509_get_key_usage( p, end_ext_octet,
maclobdell 0:f7c60d3e7b8a 625 &crt->key_usage ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 626 return( ret );
maclobdell 0:f7c60d3e7b8a 627 break;
maclobdell 0:f7c60d3e7b8a 628
maclobdell 0:f7c60d3e7b8a 629 case MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE:
maclobdell 0:f7c60d3e7b8a 630 /* Parse extended key usage */
maclobdell 0:f7c60d3e7b8a 631 if( ( ret = x509_get_ext_key_usage( p, end_ext_octet,
maclobdell 0:f7c60d3e7b8a 632 &crt->ext_key_usage ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 633 return( ret );
maclobdell 0:f7c60d3e7b8a 634 break;
maclobdell 0:f7c60d3e7b8a 635
maclobdell 0:f7c60d3e7b8a 636 case MBEDTLS_X509_EXT_SUBJECT_ALT_NAME:
maclobdell 0:f7c60d3e7b8a 637 /* Parse subject alt name */
maclobdell 0:f7c60d3e7b8a 638 if( ( ret = x509_get_subject_alt_name( p, end_ext_octet,
maclobdell 0:f7c60d3e7b8a 639 &crt->subject_alt_names ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 640 return( ret );
maclobdell 0:f7c60d3e7b8a 641 break;
maclobdell 0:f7c60d3e7b8a 642
maclobdell 0:f7c60d3e7b8a 643 case MBEDTLS_X509_EXT_NS_CERT_TYPE:
maclobdell 0:f7c60d3e7b8a 644 /* Parse netscape certificate type */
maclobdell 0:f7c60d3e7b8a 645 if( ( ret = x509_get_ns_cert_type( p, end_ext_octet,
maclobdell 0:f7c60d3e7b8a 646 &crt->ns_cert_type ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 647 return( ret );
maclobdell 0:f7c60d3e7b8a 648 break;
maclobdell 0:f7c60d3e7b8a 649
maclobdell 0:f7c60d3e7b8a 650 default:
maclobdell 0:f7c60d3e7b8a 651 return( MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE );
maclobdell 0:f7c60d3e7b8a 652 }
maclobdell 0:f7c60d3e7b8a 653 }
maclobdell 0:f7c60d3e7b8a 654
maclobdell 0:f7c60d3e7b8a 655 if( *p != end )
maclobdell 0:f7c60d3e7b8a 656 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
maclobdell 0:f7c60d3e7b8a 657 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
maclobdell 0:f7c60d3e7b8a 658
maclobdell 0:f7c60d3e7b8a 659 return( 0 );
maclobdell 0:f7c60d3e7b8a 660 }
maclobdell 0:f7c60d3e7b8a 661
maclobdell 0:f7c60d3e7b8a 662 /*
maclobdell 0:f7c60d3e7b8a 663 * Parse and fill a single X.509 certificate in DER format
maclobdell 0:f7c60d3e7b8a 664 */
maclobdell 0:f7c60d3e7b8a 665 static int x509_crt_parse_der_core( mbedtls_x509_crt *crt, const unsigned char *buf,
maclobdell 0:f7c60d3e7b8a 666 size_t buflen )
maclobdell 0:f7c60d3e7b8a 667 {
maclobdell 0:f7c60d3e7b8a 668 int ret;
maclobdell 0:f7c60d3e7b8a 669 size_t len;
maclobdell 0:f7c60d3e7b8a 670 unsigned char *p, *end, *crt_end;
maclobdell 0:f7c60d3e7b8a 671 mbedtls_x509_buf sig_params1, sig_params2, sig_oid2;
maclobdell 0:f7c60d3e7b8a 672
maclobdell 0:f7c60d3e7b8a 673 memset( &sig_params1, 0, sizeof( mbedtls_x509_buf ) );
maclobdell 0:f7c60d3e7b8a 674 memset( &sig_params2, 0, sizeof( mbedtls_x509_buf ) );
maclobdell 0:f7c60d3e7b8a 675 memset( &sig_oid2, 0, sizeof( mbedtls_x509_buf ) );
maclobdell 0:f7c60d3e7b8a 676
maclobdell 0:f7c60d3e7b8a 677 /*
maclobdell 0:f7c60d3e7b8a 678 * Check for valid input
maclobdell 0:f7c60d3e7b8a 679 */
maclobdell 0:f7c60d3e7b8a 680 if( crt == NULL || buf == NULL )
maclobdell 0:f7c60d3e7b8a 681 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 682
maclobdell 0:f7c60d3e7b8a 683 p = mbedtls_calloc( 1, len = buflen );
maclobdell 0:f7c60d3e7b8a 684 if( p == NULL )
maclobdell 0:f7c60d3e7b8a 685 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
maclobdell 0:f7c60d3e7b8a 686
maclobdell 0:f7c60d3e7b8a 687 memcpy( p, buf, buflen );
maclobdell 0:f7c60d3e7b8a 688
maclobdell 0:f7c60d3e7b8a 689 crt->raw.p = p;
maclobdell 0:f7c60d3e7b8a 690 crt->raw.len = len;
maclobdell 0:f7c60d3e7b8a 691 end = p + len;
maclobdell 0:f7c60d3e7b8a 692
maclobdell 0:f7c60d3e7b8a 693 /*
maclobdell 0:f7c60d3e7b8a 694 * Certificate ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 695 * tbsCertificate TBSCertificate,
maclobdell 0:f7c60d3e7b8a 696 * signatureAlgorithm AlgorithmIdentifier,
maclobdell 0:f7c60d3e7b8a 697 * signatureValue BIT STRING }
maclobdell 0:f7c60d3e7b8a 698 */
maclobdell 0:f7c60d3e7b8a 699 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
maclobdell 0:f7c60d3e7b8a 700 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 701 {
maclobdell 0:f7c60d3e7b8a 702 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 703 return( MBEDTLS_ERR_X509_INVALID_FORMAT );
maclobdell 0:f7c60d3e7b8a 704 }
maclobdell 0:f7c60d3e7b8a 705
maclobdell 0:f7c60d3e7b8a 706 if( len > (size_t) ( end - p ) )
maclobdell 0:f7c60d3e7b8a 707 {
maclobdell 0:f7c60d3e7b8a 708 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 709 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
maclobdell 0:f7c60d3e7b8a 710 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
maclobdell 0:f7c60d3e7b8a 711 }
maclobdell 0:f7c60d3e7b8a 712 crt_end = p + len;
maclobdell 0:f7c60d3e7b8a 713
maclobdell 0:f7c60d3e7b8a 714 /*
maclobdell 0:f7c60d3e7b8a 715 * TBSCertificate ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 716 */
maclobdell 0:f7c60d3e7b8a 717 crt->tbs.p = p;
maclobdell 0:f7c60d3e7b8a 718
maclobdell 0:f7c60d3e7b8a 719 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
maclobdell 0:f7c60d3e7b8a 720 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 721 {
maclobdell 0:f7c60d3e7b8a 722 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 723 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
maclobdell 0:f7c60d3e7b8a 724 }
maclobdell 0:f7c60d3e7b8a 725
maclobdell 0:f7c60d3e7b8a 726 end = p + len;
maclobdell 0:f7c60d3e7b8a 727 crt->tbs.len = end - crt->tbs.p;
maclobdell 0:f7c60d3e7b8a 728
maclobdell 0:f7c60d3e7b8a 729 /*
maclobdell 0:f7c60d3e7b8a 730 * Version ::= INTEGER { v1(0), v2(1), v3(2) }
maclobdell 0:f7c60d3e7b8a 731 *
maclobdell 0:f7c60d3e7b8a 732 * CertificateSerialNumber ::= INTEGER
maclobdell 0:f7c60d3e7b8a 733 *
maclobdell 0:f7c60d3e7b8a 734 * signature AlgorithmIdentifier
maclobdell 0:f7c60d3e7b8a 735 */
maclobdell 0:f7c60d3e7b8a 736 if( ( ret = x509_get_version( &p, end, &crt->version ) ) != 0 ||
maclobdell 0:f7c60d3e7b8a 737 ( ret = mbedtls_x509_get_serial( &p, end, &crt->serial ) ) != 0 ||
maclobdell 0:f7c60d3e7b8a 738 ( ret = mbedtls_x509_get_alg( &p, end, &crt->sig_oid,
maclobdell 0:f7c60d3e7b8a 739 &sig_params1 ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 740 {
maclobdell 0:f7c60d3e7b8a 741 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 742 return( ret );
maclobdell 0:f7c60d3e7b8a 743 }
maclobdell 0:f7c60d3e7b8a 744
maclobdell 0:f7c60d3e7b8a 745 crt->version++;
maclobdell 0:f7c60d3e7b8a 746
maclobdell 0:f7c60d3e7b8a 747 if( crt->version > 3 )
maclobdell 0:f7c60d3e7b8a 748 {
maclobdell 0:f7c60d3e7b8a 749 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 750 return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
maclobdell 0:f7c60d3e7b8a 751 }
maclobdell 0:f7c60d3e7b8a 752
maclobdell 0:f7c60d3e7b8a 753 if( ( ret = mbedtls_x509_get_sig_alg( &crt->sig_oid, &sig_params1,
maclobdell 0:f7c60d3e7b8a 754 &crt->sig_md, &crt->sig_pk,
maclobdell 0:f7c60d3e7b8a 755 &crt->sig_opts ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 756 {
maclobdell 0:f7c60d3e7b8a 757 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 758 return( ret );
maclobdell 0:f7c60d3e7b8a 759 }
maclobdell 0:f7c60d3e7b8a 760
maclobdell 0:f7c60d3e7b8a 761 /*
maclobdell 0:f7c60d3e7b8a 762 * issuer Name
maclobdell 0:f7c60d3e7b8a 763 */
maclobdell 0:f7c60d3e7b8a 764 crt->issuer_raw.p = p;
maclobdell 0:f7c60d3e7b8a 765
maclobdell 0:f7c60d3e7b8a 766 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
maclobdell 0:f7c60d3e7b8a 767 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 768 {
maclobdell 0:f7c60d3e7b8a 769 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 770 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
maclobdell 0:f7c60d3e7b8a 771 }
maclobdell 0:f7c60d3e7b8a 772
maclobdell 0:f7c60d3e7b8a 773 if( ( ret = mbedtls_x509_get_name( &p, p + len, &crt->issuer ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 774 {
maclobdell 0:f7c60d3e7b8a 775 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 776 return( ret );
maclobdell 0:f7c60d3e7b8a 777 }
maclobdell 0:f7c60d3e7b8a 778
maclobdell 0:f7c60d3e7b8a 779 crt->issuer_raw.len = p - crt->issuer_raw.p;
maclobdell 0:f7c60d3e7b8a 780
maclobdell 0:f7c60d3e7b8a 781 /*
maclobdell 0:f7c60d3e7b8a 782 * Validity ::= SEQUENCE {
maclobdell 0:f7c60d3e7b8a 783 * notBefore Time,
maclobdell 0:f7c60d3e7b8a 784 * notAfter Time }
maclobdell 0:f7c60d3e7b8a 785 *
maclobdell 0:f7c60d3e7b8a 786 */
maclobdell 0:f7c60d3e7b8a 787 if( ( ret = x509_get_dates( &p, end, &crt->valid_from,
maclobdell 0:f7c60d3e7b8a 788 &crt->valid_to ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 789 {
maclobdell 0:f7c60d3e7b8a 790 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 791 return( ret );
maclobdell 0:f7c60d3e7b8a 792 }
maclobdell 0:f7c60d3e7b8a 793
maclobdell 0:f7c60d3e7b8a 794 /*
maclobdell 0:f7c60d3e7b8a 795 * subject Name
maclobdell 0:f7c60d3e7b8a 796 */
maclobdell 0:f7c60d3e7b8a 797 crt->subject_raw.p = p;
maclobdell 0:f7c60d3e7b8a 798
maclobdell 0:f7c60d3e7b8a 799 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
maclobdell 0:f7c60d3e7b8a 800 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 801 {
maclobdell 0:f7c60d3e7b8a 802 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 803 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
maclobdell 0:f7c60d3e7b8a 804 }
maclobdell 0:f7c60d3e7b8a 805
maclobdell 0:f7c60d3e7b8a 806 if( len && ( ret = mbedtls_x509_get_name( &p, p + len, &crt->subject ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 807 {
maclobdell 0:f7c60d3e7b8a 808 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 809 return( ret );
maclobdell 0:f7c60d3e7b8a 810 }
maclobdell 0:f7c60d3e7b8a 811
maclobdell 0:f7c60d3e7b8a 812 crt->subject_raw.len = p - crt->subject_raw.p;
maclobdell 0:f7c60d3e7b8a 813
maclobdell 0:f7c60d3e7b8a 814 /*
maclobdell 0:f7c60d3e7b8a 815 * SubjectPublicKeyInfo
maclobdell 0:f7c60d3e7b8a 816 */
maclobdell 0:f7c60d3e7b8a 817 if( ( ret = mbedtls_pk_parse_subpubkey( &p, end, &crt->pk ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 818 {
maclobdell 0:f7c60d3e7b8a 819 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 820 return( ret );
maclobdell 0:f7c60d3e7b8a 821 }
maclobdell 0:f7c60d3e7b8a 822
maclobdell 0:f7c60d3e7b8a 823 /*
maclobdell 0:f7c60d3e7b8a 824 * issuerUniqueID [1] IMPLICIT UniqueIdentifier OPTIONAL,
maclobdell 0:f7c60d3e7b8a 825 * -- If present, version shall be v2 or v3
maclobdell 0:f7c60d3e7b8a 826 * subjectUniqueID [2] IMPLICIT UniqueIdentifier OPTIONAL,
maclobdell 0:f7c60d3e7b8a 827 * -- If present, version shall be v2 or v3
maclobdell 0:f7c60d3e7b8a 828 * extensions [3] EXPLICIT Extensions OPTIONAL
maclobdell 0:f7c60d3e7b8a 829 * -- If present, version shall be v3
maclobdell 0:f7c60d3e7b8a 830 */
maclobdell 0:f7c60d3e7b8a 831 if( crt->version == 2 || crt->version == 3 )
maclobdell 0:f7c60d3e7b8a 832 {
maclobdell 0:f7c60d3e7b8a 833 ret = x509_get_uid( &p, end, &crt->issuer_id, 1 );
maclobdell 0:f7c60d3e7b8a 834 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 835 {
maclobdell 0:f7c60d3e7b8a 836 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 837 return( ret );
maclobdell 0:f7c60d3e7b8a 838 }
maclobdell 0:f7c60d3e7b8a 839 }
maclobdell 0:f7c60d3e7b8a 840
maclobdell 0:f7c60d3e7b8a 841 if( crt->version == 2 || crt->version == 3 )
maclobdell 0:f7c60d3e7b8a 842 {
maclobdell 0:f7c60d3e7b8a 843 ret = x509_get_uid( &p, end, &crt->subject_id, 2 );
maclobdell 0:f7c60d3e7b8a 844 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 845 {
maclobdell 0:f7c60d3e7b8a 846 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 847 return( ret );
maclobdell 0:f7c60d3e7b8a 848 }
maclobdell 0:f7c60d3e7b8a 849 }
maclobdell 0:f7c60d3e7b8a 850
maclobdell 0:f7c60d3e7b8a 851 #if !defined(MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3)
maclobdell 0:f7c60d3e7b8a 852 if( crt->version == 3 )
maclobdell 0:f7c60d3e7b8a 853 #endif
maclobdell 0:f7c60d3e7b8a 854 {
maclobdell 0:f7c60d3e7b8a 855 ret = x509_get_crt_ext( &p, end, crt );
maclobdell 0:f7c60d3e7b8a 856 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 857 {
maclobdell 0:f7c60d3e7b8a 858 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 859 return( ret );
maclobdell 0:f7c60d3e7b8a 860 }
maclobdell 0:f7c60d3e7b8a 861 }
maclobdell 0:f7c60d3e7b8a 862
maclobdell 0:f7c60d3e7b8a 863 if( p != end )
maclobdell 0:f7c60d3e7b8a 864 {
maclobdell 0:f7c60d3e7b8a 865 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 866 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
maclobdell 0:f7c60d3e7b8a 867 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
maclobdell 0:f7c60d3e7b8a 868 }
maclobdell 0:f7c60d3e7b8a 869
maclobdell 0:f7c60d3e7b8a 870 end = crt_end;
maclobdell 0:f7c60d3e7b8a 871
maclobdell 0:f7c60d3e7b8a 872 /*
maclobdell 0:f7c60d3e7b8a 873 * }
maclobdell 0:f7c60d3e7b8a 874 * -- end of TBSCertificate
maclobdell 0:f7c60d3e7b8a 875 *
maclobdell 0:f7c60d3e7b8a 876 * signatureAlgorithm AlgorithmIdentifier,
maclobdell 0:f7c60d3e7b8a 877 * signatureValue BIT STRING
maclobdell 0:f7c60d3e7b8a 878 */
maclobdell 0:f7c60d3e7b8a 879 if( ( ret = mbedtls_x509_get_alg( &p, end, &sig_oid2, &sig_params2 ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 880 {
maclobdell 0:f7c60d3e7b8a 881 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 882 return( ret );
maclobdell 0:f7c60d3e7b8a 883 }
maclobdell 0:f7c60d3e7b8a 884
maclobdell 0:f7c60d3e7b8a 885 if( crt->sig_oid.len != sig_oid2.len ||
maclobdell 0:f7c60d3e7b8a 886 memcmp( crt->sig_oid.p, sig_oid2.p, crt->sig_oid.len ) != 0 ||
maclobdell 0:f7c60d3e7b8a 887 sig_params1.len != sig_params2.len ||
maclobdell 0:f7c60d3e7b8a 888 ( sig_params1.len != 0 &&
maclobdell 0:f7c60d3e7b8a 889 memcmp( sig_params1.p, sig_params2.p, sig_params1.len ) != 0 ) )
maclobdell 0:f7c60d3e7b8a 890 {
maclobdell 0:f7c60d3e7b8a 891 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 892 return( MBEDTLS_ERR_X509_SIG_MISMATCH );
maclobdell 0:f7c60d3e7b8a 893 }
maclobdell 0:f7c60d3e7b8a 894
maclobdell 0:f7c60d3e7b8a 895 if( ( ret = mbedtls_x509_get_sig( &p, end, &crt->sig ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 896 {
maclobdell 0:f7c60d3e7b8a 897 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 898 return( ret );
maclobdell 0:f7c60d3e7b8a 899 }
maclobdell 0:f7c60d3e7b8a 900
maclobdell 0:f7c60d3e7b8a 901 if( p != end )
maclobdell 0:f7c60d3e7b8a 902 {
maclobdell 0:f7c60d3e7b8a 903 mbedtls_x509_crt_free( crt );
maclobdell 0:f7c60d3e7b8a 904 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
maclobdell 0:f7c60d3e7b8a 905 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
maclobdell 0:f7c60d3e7b8a 906 }
maclobdell 0:f7c60d3e7b8a 907
maclobdell 0:f7c60d3e7b8a 908 return( 0 );
maclobdell 0:f7c60d3e7b8a 909 }
maclobdell 0:f7c60d3e7b8a 910
maclobdell 0:f7c60d3e7b8a 911 /*
maclobdell 0:f7c60d3e7b8a 912 * Parse one X.509 certificate in DER format from a buffer and add them to a
maclobdell 0:f7c60d3e7b8a 913 * chained list
maclobdell 0:f7c60d3e7b8a 914 */
maclobdell 0:f7c60d3e7b8a 915 int mbedtls_x509_crt_parse_der( mbedtls_x509_crt *chain, const unsigned char *buf,
maclobdell 0:f7c60d3e7b8a 916 size_t buflen )
maclobdell 0:f7c60d3e7b8a 917 {
maclobdell 0:f7c60d3e7b8a 918 int ret;
maclobdell 0:f7c60d3e7b8a 919 mbedtls_x509_crt *crt = chain, *prev = NULL;
maclobdell 0:f7c60d3e7b8a 920
maclobdell 0:f7c60d3e7b8a 921 /*
maclobdell 0:f7c60d3e7b8a 922 * Check for valid input
maclobdell 0:f7c60d3e7b8a 923 */
maclobdell 0:f7c60d3e7b8a 924 if( crt == NULL || buf == NULL )
maclobdell 0:f7c60d3e7b8a 925 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 926
maclobdell 0:f7c60d3e7b8a 927 while( crt->version != 0 && crt->next != NULL )
maclobdell 0:f7c60d3e7b8a 928 {
maclobdell 0:f7c60d3e7b8a 929 prev = crt;
maclobdell 0:f7c60d3e7b8a 930 crt = crt->next;
maclobdell 0:f7c60d3e7b8a 931 }
maclobdell 0:f7c60d3e7b8a 932
maclobdell 0:f7c60d3e7b8a 933 /*
maclobdell 0:f7c60d3e7b8a 934 * Add new certificate on the end of the chain if needed.
maclobdell 0:f7c60d3e7b8a 935 */
maclobdell 0:f7c60d3e7b8a 936 if( crt->version != 0 && crt->next == NULL )
maclobdell 0:f7c60d3e7b8a 937 {
maclobdell 0:f7c60d3e7b8a 938 crt->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) );
maclobdell 0:f7c60d3e7b8a 939
maclobdell 0:f7c60d3e7b8a 940 if( crt->next == NULL )
maclobdell 0:f7c60d3e7b8a 941 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
maclobdell 0:f7c60d3e7b8a 942
maclobdell 0:f7c60d3e7b8a 943 prev = crt;
maclobdell 0:f7c60d3e7b8a 944 mbedtls_x509_crt_init( crt->next );
maclobdell 0:f7c60d3e7b8a 945 crt = crt->next;
maclobdell 0:f7c60d3e7b8a 946 }
maclobdell 0:f7c60d3e7b8a 947
maclobdell 0:f7c60d3e7b8a 948 if( ( ret = x509_crt_parse_der_core( crt, buf, buflen ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 949 {
maclobdell 0:f7c60d3e7b8a 950 if( prev )
maclobdell 0:f7c60d3e7b8a 951 prev->next = NULL;
maclobdell 0:f7c60d3e7b8a 952
maclobdell 0:f7c60d3e7b8a 953 if( crt != chain )
maclobdell 0:f7c60d3e7b8a 954 mbedtls_free( crt );
maclobdell 0:f7c60d3e7b8a 955
maclobdell 0:f7c60d3e7b8a 956 return( ret );
maclobdell 0:f7c60d3e7b8a 957 }
maclobdell 0:f7c60d3e7b8a 958
maclobdell 0:f7c60d3e7b8a 959 return( 0 );
maclobdell 0:f7c60d3e7b8a 960 }
maclobdell 0:f7c60d3e7b8a 961
maclobdell 0:f7c60d3e7b8a 962 /*
maclobdell 0:f7c60d3e7b8a 963 * Parse one or more PEM certificates from a buffer and add them to the chained
maclobdell 0:f7c60d3e7b8a 964 * list
maclobdell 0:f7c60d3e7b8a 965 */
maclobdell 0:f7c60d3e7b8a 966 int mbedtls_x509_crt_parse( mbedtls_x509_crt *chain, const unsigned char *buf, size_t buflen )
maclobdell 0:f7c60d3e7b8a 967 {
maclobdell 0:f7c60d3e7b8a 968 int success = 0, first_error = 0, total_failed = 0;
maclobdell 0:f7c60d3e7b8a 969 int buf_format = MBEDTLS_X509_FORMAT_DER;
maclobdell 0:f7c60d3e7b8a 970
maclobdell 0:f7c60d3e7b8a 971 /*
maclobdell 0:f7c60d3e7b8a 972 * Check for valid input
maclobdell 0:f7c60d3e7b8a 973 */
maclobdell 0:f7c60d3e7b8a 974 if( chain == NULL || buf == NULL )
maclobdell 0:f7c60d3e7b8a 975 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 976
maclobdell 0:f7c60d3e7b8a 977 /*
maclobdell 0:f7c60d3e7b8a 978 * Determine buffer content. Buffer contains either one DER certificate or
maclobdell 0:f7c60d3e7b8a 979 * one or more PEM certificates.
maclobdell 0:f7c60d3e7b8a 980 */
maclobdell 0:f7c60d3e7b8a 981 #if defined(MBEDTLS_PEM_PARSE_C)
maclobdell 0:f7c60d3e7b8a 982 if( buflen != 0 && buf[buflen - 1] == '\0' &&
maclobdell 0:f7c60d3e7b8a 983 strstr( (const char *) buf, "-----BEGIN CERTIFICATE-----" ) != NULL )
maclobdell 0:f7c60d3e7b8a 984 {
maclobdell 0:f7c60d3e7b8a 985 buf_format = MBEDTLS_X509_FORMAT_PEM;
maclobdell 0:f7c60d3e7b8a 986 }
maclobdell 0:f7c60d3e7b8a 987 #endif
maclobdell 0:f7c60d3e7b8a 988
maclobdell 0:f7c60d3e7b8a 989 if( buf_format == MBEDTLS_X509_FORMAT_DER )
maclobdell 0:f7c60d3e7b8a 990 return mbedtls_x509_crt_parse_der( chain, buf, buflen );
maclobdell 0:f7c60d3e7b8a 991
maclobdell 0:f7c60d3e7b8a 992 #if defined(MBEDTLS_PEM_PARSE_C)
maclobdell 0:f7c60d3e7b8a 993 if( buf_format == MBEDTLS_X509_FORMAT_PEM )
maclobdell 0:f7c60d3e7b8a 994 {
maclobdell 0:f7c60d3e7b8a 995 int ret;
maclobdell 0:f7c60d3e7b8a 996 mbedtls_pem_context pem;
maclobdell 0:f7c60d3e7b8a 997
maclobdell 0:f7c60d3e7b8a 998 /* 1 rather than 0 since the terminating NULL byte is counted in */
maclobdell 0:f7c60d3e7b8a 999 while( buflen > 1 )
maclobdell 0:f7c60d3e7b8a 1000 {
maclobdell 0:f7c60d3e7b8a 1001 size_t use_len;
maclobdell 0:f7c60d3e7b8a 1002 mbedtls_pem_init( &pem );
maclobdell 0:f7c60d3e7b8a 1003
maclobdell 0:f7c60d3e7b8a 1004 /* If we get there, we know the string is null-terminated */
maclobdell 0:f7c60d3e7b8a 1005 ret = mbedtls_pem_read_buffer( &pem,
maclobdell 0:f7c60d3e7b8a 1006 "-----BEGIN CERTIFICATE-----",
maclobdell 0:f7c60d3e7b8a 1007 "-----END CERTIFICATE-----",
maclobdell 0:f7c60d3e7b8a 1008 buf, NULL, 0, &use_len );
maclobdell 0:f7c60d3e7b8a 1009
maclobdell 0:f7c60d3e7b8a 1010 if( ret == 0 )
maclobdell 0:f7c60d3e7b8a 1011 {
maclobdell 0:f7c60d3e7b8a 1012 /*
maclobdell 0:f7c60d3e7b8a 1013 * Was PEM encoded
maclobdell 0:f7c60d3e7b8a 1014 */
maclobdell 0:f7c60d3e7b8a 1015 buflen -= use_len;
maclobdell 0:f7c60d3e7b8a 1016 buf += use_len;
maclobdell 0:f7c60d3e7b8a 1017 }
maclobdell 0:f7c60d3e7b8a 1018 else if( ret == MBEDTLS_ERR_PEM_BAD_INPUT_DATA )
maclobdell 0:f7c60d3e7b8a 1019 {
maclobdell 0:f7c60d3e7b8a 1020 return( ret );
maclobdell 0:f7c60d3e7b8a 1021 }
maclobdell 0:f7c60d3e7b8a 1022 else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
maclobdell 0:f7c60d3e7b8a 1023 {
maclobdell 0:f7c60d3e7b8a 1024 mbedtls_pem_free( &pem );
maclobdell 0:f7c60d3e7b8a 1025
maclobdell 0:f7c60d3e7b8a 1026 /*
maclobdell 0:f7c60d3e7b8a 1027 * PEM header and footer were found
maclobdell 0:f7c60d3e7b8a 1028 */
maclobdell 0:f7c60d3e7b8a 1029 buflen -= use_len;
maclobdell 0:f7c60d3e7b8a 1030 buf += use_len;
maclobdell 0:f7c60d3e7b8a 1031
maclobdell 0:f7c60d3e7b8a 1032 if( first_error == 0 )
maclobdell 0:f7c60d3e7b8a 1033 first_error = ret;
maclobdell 0:f7c60d3e7b8a 1034
maclobdell 0:f7c60d3e7b8a 1035 total_failed++;
maclobdell 0:f7c60d3e7b8a 1036 continue;
maclobdell 0:f7c60d3e7b8a 1037 }
maclobdell 0:f7c60d3e7b8a 1038 else
maclobdell 0:f7c60d3e7b8a 1039 break;
maclobdell 0:f7c60d3e7b8a 1040
maclobdell 0:f7c60d3e7b8a 1041 ret = mbedtls_x509_crt_parse_der( chain, pem.buf, pem.buflen );
maclobdell 0:f7c60d3e7b8a 1042
maclobdell 0:f7c60d3e7b8a 1043 mbedtls_pem_free( &pem );
maclobdell 0:f7c60d3e7b8a 1044
maclobdell 0:f7c60d3e7b8a 1045 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 1046 {
maclobdell 0:f7c60d3e7b8a 1047 /*
maclobdell 0:f7c60d3e7b8a 1048 * Quit parsing on a memory error
maclobdell 0:f7c60d3e7b8a 1049 */
maclobdell 0:f7c60d3e7b8a 1050 if( ret == MBEDTLS_ERR_X509_ALLOC_FAILED )
maclobdell 0:f7c60d3e7b8a 1051 return( ret );
maclobdell 0:f7c60d3e7b8a 1052
maclobdell 0:f7c60d3e7b8a 1053 if( first_error == 0 )
maclobdell 0:f7c60d3e7b8a 1054 first_error = ret;
maclobdell 0:f7c60d3e7b8a 1055
maclobdell 0:f7c60d3e7b8a 1056 total_failed++;
maclobdell 0:f7c60d3e7b8a 1057 continue;
maclobdell 0:f7c60d3e7b8a 1058 }
maclobdell 0:f7c60d3e7b8a 1059
maclobdell 0:f7c60d3e7b8a 1060 success = 1;
maclobdell 0:f7c60d3e7b8a 1061 }
maclobdell 0:f7c60d3e7b8a 1062 }
maclobdell 0:f7c60d3e7b8a 1063 #endif /* MBEDTLS_PEM_PARSE_C */
maclobdell 0:f7c60d3e7b8a 1064
maclobdell 0:f7c60d3e7b8a 1065 if( success )
maclobdell 0:f7c60d3e7b8a 1066 return( total_failed );
maclobdell 0:f7c60d3e7b8a 1067 else if( first_error )
maclobdell 0:f7c60d3e7b8a 1068 return( first_error );
maclobdell 0:f7c60d3e7b8a 1069 else
maclobdell 0:f7c60d3e7b8a 1070 return( MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT );
maclobdell 0:f7c60d3e7b8a 1071 }
maclobdell 0:f7c60d3e7b8a 1072
maclobdell 0:f7c60d3e7b8a 1073 #if defined(MBEDTLS_FS_IO)
maclobdell 0:f7c60d3e7b8a 1074 /*
maclobdell 0:f7c60d3e7b8a 1075 * Load one or more certificates and add them to the chained list
maclobdell 0:f7c60d3e7b8a 1076 */
maclobdell 0:f7c60d3e7b8a 1077 int mbedtls_x509_crt_parse_file( mbedtls_x509_crt *chain, const char *path )
maclobdell 0:f7c60d3e7b8a 1078 {
maclobdell 0:f7c60d3e7b8a 1079 int ret;
maclobdell 0:f7c60d3e7b8a 1080 size_t n;
maclobdell 0:f7c60d3e7b8a 1081 unsigned char *buf;
maclobdell 0:f7c60d3e7b8a 1082
maclobdell 0:f7c60d3e7b8a 1083 if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 1084 return( ret );
maclobdell 0:f7c60d3e7b8a 1085
maclobdell 0:f7c60d3e7b8a 1086 ret = mbedtls_x509_crt_parse( chain, buf, n );
maclobdell 0:f7c60d3e7b8a 1087
maclobdell 0:f7c60d3e7b8a 1088 mbedtls_zeroize( buf, n );
maclobdell 0:f7c60d3e7b8a 1089 mbedtls_free( buf );
maclobdell 0:f7c60d3e7b8a 1090
maclobdell 0:f7c60d3e7b8a 1091 return( ret );
maclobdell 0:f7c60d3e7b8a 1092 }
maclobdell 0:f7c60d3e7b8a 1093
maclobdell 0:f7c60d3e7b8a 1094 int mbedtls_x509_crt_parse_path( mbedtls_x509_crt *chain, const char *path )
maclobdell 0:f7c60d3e7b8a 1095 {
maclobdell 0:f7c60d3e7b8a 1096 int ret = 0;
maclobdell 0:f7c60d3e7b8a 1097 #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
maclobdell 0:f7c60d3e7b8a 1098 int w_ret;
maclobdell 0:f7c60d3e7b8a 1099 WCHAR szDir[MAX_PATH];
maclobdell 0:f7c60d3e7b8a 1100 char filename[MAX_PATH];
maclobdell 0:f7c60d3e7b8a 1101 char *p;
maclobdell 0:f7c60d3e7b8a 1102 size_t len = strlen( path );
maclobdell 0:f7c60d3e7b8a 1103
maclobdell 0:f7c60d3e7b8a 1104 WIN32_FIND_DATAW file_data;
maclobdell 0:f7c60d3e7b8a 1105 HANDLE hFind;
maclobdell 0:f7c60d3e7b8a 1106
maclobdell 0:f7c60d3e7b8a 1107 if( len > MAX_PATH - 3 )
maclobdell 0:f7c60d3e7b8a 1108 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 1109
maclobdell 0:f7c60d3e7b8a 1110 memset( szDir, 0, sizeof(szDir) );
maclobdell 0:f7c60d3e7b8a 1111 memset( filename, 0, MAX_PATH );
maclobdell 0:f7c60d3e7b8a 1112 memcpy( filename, path, len );
maclobdell 0:f7c60d3e7b8a 1113 filename[len++] = '\\';
maclobdell 0:f7c60d3e7b8a 1114 p = filename + len;
maclobdell 0:f7c60d3e7b8a 1115 filename[len++] = '*';
maclobdell 0:f7c60d3e7b8a 1116
maclobdell 0:f7c60d3e7b8a 1117 w_ret = MultiByteToWideChar( CP_ACP, 0, filename, len, szDir,
maclobdell 0:f7c60d3e7b8a 1118 MAX_PATH - 3 );
maclobdell 0:f7c60d3e7b8a 1119 if( w_ret == 0 )
maclobdell 0:f7c60d3e7b8a 1120 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 1121
maclobdell 0:f7c60d3e7b8a 1122 hFind = FindFirstFileW( szDir, &file_data );
maclobdell 0:f7c60d3e7b8a 1123 if( hFind == INVALID_HANDLE_VALUE )
maclobdell 0:f7c60d3e7b8a 1124 return( MBEDTLS_ERR_X509_FILE_IO_ERROR );
maclobdell 0:f7c60d3e7b8a 1125
maclobdell 0:f7c60d3e7b8a 1126 len = MAX_PATH - len;
maclobdell 0:f7c60d3e7b8a 1127 do
maclobdell 0:f7c60d3e7b8a 1128 {
maclobdell 0:f7c60d3e7b8a 1129 memset( p, 0, len );
maclobdell 0:f7c60d3e7b8a 1130
maclobdell 0:f7c60d3e7b8a 1131 if( file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY )
maclobdell 0:f7c60d3e7b8a 1132 continue;
maclobdell 0:f7c60d3e7b8a 1133
maclobdell 0:f7c60d3e7b8a 1134 w_ret = WideCharToMultiByte( CP_ACP, 0, file_data.cFileName,
maclobdell 0:f7c60d3e7b8a 1135 lstrlenW( file_data.cFileName ),
maclobdell 0:f7c60d3e7b8a 1136 p, (int) len - 1,
maclobdell 0:f7c60d3e7b8a 1137 NULL, NULL );
maclobdell 0:f7c60d3e7b8a 1138 if( w_ret == 0 )
maclobdell 0:f7c60d3e7b8a 1139 return( MBEDTLS_ERR_X509_FILE_IO_ERROR );
maclobdell 0:f7c60d3e7b8a 1140
maclobdell 0:f7c60d3e7b8a 1141 w_ret = mbedtls_x509_crt_parse_file( chain, filename );
maclobdell 0:f7c60d3e7b8a 1142 if( w_ret < 0 )
maclobdell 0:f7c60d3e7b8a 1143 ret++;
maclobdell 0:f7c60d3e7b8a 1144 else
maclobdell 0:f7c60d3e7b8a 1145 ret += w_ret;
maclobdell 0:f7c60d3e7b8a 1146 }
maclobdell 0:f7c60d3e7b8a 1147 while( FindNextFileW( hFind, &file_data ) != 0 );
maclobdell 0:f7c60d3e7b8a 1148
maclobdell 0:f7c60d3e7b8a 1149 if( GetLastError() != ERROR_NO_MORE_FILES )
maclobdell 0:f7c60d3e7b8a 1150 ret = MBEDTLS_ERR_X509_FILE_IO_ERROR;
maclobdell 0:f7c60d3e7b8a 1151
maclobdell 0:f7c60d3e7b8a 1152 FindClose( hFind );
maclobdell 0:f7c60d3e7b8a 1153 #else /* _WIN32 */
maclobdell 0:f7c60d3e7b8a 1154 int t_ret;
maclobdell 0:f7c60d3e7b8a 1155 struct stat sb;
maclobdell 0:f7c60d3e7b8a 1156 struct dirent *entry;
maclobdell 0:f7c60d3e7b8a 1157 char entry_name[255];
maclobdell 0:f7c60d3e7b8a 1158 DIR *dir = opendir( path );
maclobdell 0:f7c60d3e7b8a 1159
maclobdell 0:f7c60d3e7b8a 1160 if( dir == NULL )
maclobdell 0:f7c60d3e7b8a 1161 return( MBEDTLS_ERR_X509_FILE_IO_ERROR );
maclobdell 0:f7c60d3e7b8a 1162
maclobdell 0:f7c60d3e7b8a 1163 #if defined(MBEDTLS_THREADING_PTHREAD)
maclobdell 0:f7c60d3e7b8a 1164 if( ( ret = mbedtls_mutex_lock( &mbedtls_threading_readdir_mutex ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 1165 {
maclobdell 0:f7c60d3e7b8a 1166 closedir( dir );
maclobdell 0:f7c60d3e7b8a 1167 return( ret );
maclobdell 0:f7c60d3e7b8a 1168 }
maclobdell 0:f7c60d3e7b8a 1169 #endif
maclobdell 0:f7c60d3e7b8a 1170
maclobdell 0:f7c60d3e7b8a 1171 while( ( entry = readdir( dir ) ) != NULL )
maclobdell 0:f7c60d3e7b8a 1172 {
maclobdell 0:f7c60d3e7b8a 1173 mbedtls_snprintf( entry_name, sizeof entry_name, "%s/%s", path, entry->d_name );
maclobdell 0:f7c60d3e7b8a 1174
maclobdell 0:f7c60d3e7b8a 1175 if( stat( entry_name, &sb ) == -1 )
maclobdell 0:f7c60d3e7b8a 1176 {
maclobdell 0:f7c60d3e7b8a 1177 closedir( dir );
maclobdell 0:f7c60d3e7b8a 1178 ret = MBEDTLS_ERR_X509_FILE_IO_ERROR;
maclobdell 0:f7c60d3e7b8a 1179 goto cleanup;
maclobdell 0:f7c60d3e7b8a 1180 }
maclobdell 0:f7c60d3e7b8a 1181
maclobdell 0:f7c60d3e7b8a 1182 if( !S_ISREG( sb.st_mode ) )
maclobdell 0:f7c60d3e7b8a 1183 continue;
maclobdell 0:f7c60d3e7b8a 1184
maclobdell 0:f7c60d3e7b8a 1185 // Ignore parse errors
maclobdell 0:f7c60d3e7b8a 1186 //
maclobdell 0:f7c60d3e7b8a 1187 t_ret = mbedtls_x509_crt_parse_file( chain, entry_name );
maclobdell 0:f7c60d3e7b8a 1188 if( t_ret < 0 )
maclobdell 0:f7c60d3e7b8a 1189 ret++;
maclobdell 0:f7c60d3e7b8a 1190 else
maclobdell 0:f7c60d3e7b8a 1191 ret += t_ret;
maclobdell 0:f7c60d3e7b8a 1192 }
maclobdell 0:f7c60d3e7b8a 1193 closedir( dir );
maclobdell 0:f7c60d3e7b8a 1194
maclobdell 0:f7c60d3e7b8a 1195 cleanup:
maclobdell 0:f7c60d3e7b8a 1196 #if defined(MBEDTLS_THREADING_PTHREAD)
maclobdell 0:f7c60d3e7b8a 1197 if( mbedtls_mutex_unlock( &mbedtls_threading_readdir_mutex ) != 0 )
maclobdell 0:f7c60d3e7b8a 1198 ret = MBEDTLS_ERR_THREADING_MUTEX_ERROR;
maclobdell 0:f7c60d3e7b8a 1199 #endif
maclobdell 0:f7c60d3e7b8a 1200
maclobdell 0:f7c60d3e7b8a 1201 #endif /* _WIN32 */
maclobdell 0:f7c60d3e7b8a 1202
maclobdell 0:f7c60d3e7b8a 1203 return( ret );
maclobdell 0:f7c60d3e7b8a 1204 }
maclobdell 0:f7c60d3e7b8a 1205 #endif /* MBEDTLS_FS_IO */
maclobdell 0:f7c60d3e7b8a 1206
maclobdell 0:f7c60d3e7b8a 1207 static int x509_info_subject_alt_name( char **buf, size_t *size,
maclobdell 0:f7c60d3e7b8a 1208 const mbedtls_x509_sequence *subject_alt_name )
maclobdell 0:f7c60d3e7b8a 1209 {
maclobdell 0:f7c60d3e7b8a 1210 size_t i;
maclobdell 0:f7c60d3e7b8a 1211 size_t n = *size;
maclobdell 0:f7c60d3e7b8a 1212 char *p = *buf;
maclobdell 0:f7c60d3e7b8a 1213 const mbedtls_x509_sequence *cur = subject_alt_name;
maclobdell 0:f7c60d3e7b8a 1214 const char *sep = "";
maclobdell 0:f7c60d3e7b8a 1215 size_t sep_len = 0;
maclobdell 0:f7c60d3e7b8a 1216
maclobdell 0:f7c60d3e7b8a 1217 while( cur != NULL )
maclobdell 0:f7c60d3e7b8a 1218 {
maclobdell 0:f7c60d3e7b8a 1219 if( cur->buf.len + sep_len >= n )
maclobdell 0:f7c60d3e7b8a 1220 {
maclobdell 0:f7c60d3e7b8a 1221 *p = '\0';
maclobdell 0:f7c60d3e7b8a 1222 return( MBEDTLS_ERR_X509_BUFFER_TOO_SMALL );
maclobdell 0:f7c60d3e7b8a 1223 }
maclobdell 0:f7c60d3e7b8a 1224
maclobdell 0:f7c60d3e7b8a 1225 n -= cur->buf.len + sep_len;
maclobdell 0:f7c60d3e7b8a 1226 for( i = 0; i < sep_len; i++ )
maclobdell 0:f7c60d3e7b8a 1227 *p++ = sep[i];
maclobdell 0:f7c60d3e7b8a 1228 for( i = 0; i < cur->buf.len; i++ )
maclobdell 0:f7c60d3e7b8a 1229 *p++ = cur->buf.p[i];
maclobdell 0:f7c60d3e7b8a 1230
maclobdell 0:f7c60d3e7b8a 1231 sep = ", ";
maclobdell 0:f7c60d3e7b8a 1232 sep_len = 2;
maclobdell 0:f7c60d3e7b8a 1233
maclobdell 0:f7c60d3e7b8a 1234 cur = cur->next;
maclobdell 0:f7c60d3e7b8a 1235 }
maclobdell 0:f7c60d3e7b8a 1236
maclobdell 0:f7c60d3e7b8a 1237 *p = '\0';
maclobdell 0:f7c60d3e7b8a 1238
maclobdell 0:f7c60d3e7b8a 1239 *size = n;
maclobdell 0:f7c60d3e7b8a 1240 *buf = p;
maclobdell 0:f7c60d3e7b8a 1241
maclobdell 0:f7c60d3e7b8a 1242 return( 0 );
maclobdell 0:f7c60d3e7b8a 1243 }
maclobdell 0:f7c60d3e7b8a 1244
maclobdell 0:f7c60d3e7b8a 1245 #define PRINT_ITEM(i) \
maclobdell 0:f7c60d3e7b8a 1246 { \
maclobdell 0:f7c60d3e7b8a 1247 ret = mbedtls_snprintf( p, n, "%s" i, sep ); \
maclobdell 0:f7c60d3e7b8a 1248 MBEDTLS_X509_SAFE_SNPRINTF; \
maclobdell 0:f7c60d3e7b8a 1249 sep = ", "; \
maclobdell 0:f7c60d3e7b8a 1250 }
maclobdell 0:f7c60d3e7b8a 1251
maclobdell 0:f7c60d3e7b8a 1252 #define CERT_TYPE(type,name) \
maclobdell 0:f7c60d3e7b8a 1253 if( ns_cert_type & type ) \
maclobdell 0:f7c60d3e7b8a 1254 PRINT_ITEM( name );
maclobdell 0:f7c60d3e7b8a 1255
maclobdell 0:f7c60d3e7b8a 1256 static int x509_info_cert_type( char **buf, size_t *size,
maclobdell 0:f7c60d3e7b8a 1257 unsigned char ns_cert_type )
maclobdell 0:f7c60d3e7b8a 1258 {
maclobdell 0:f7c60d3e7b8a 1259 int ret;
maclobdell 0:f7c60d3e7b8a 1260 size_t n = *size;
maclobdell 0:f7c60d3e7b8a 1261 char *p = *buf;
maclobdell 0:f7c60d3e7b8a 1262 const char *sep = "";
maclobdell 0:f7c60d3e7b8a 1263
maclobdell 0:f7c60d3e7b8a 1264 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT, "SSL Client" );
maclobdell 0:f7c60d3e7b8a 1265 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER, "SSL Server" );
maclobdell 0:f7c60d3e7b8a 1266 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_EMAIL, "Email" );
maclobdell 0:f7c60d3e7b8a 1267 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING, "Object Signing" );
maclobdell 0:f7c60d3e7b8a 1268 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_RESERVED, "Reserved" );
maclobdell 0:f7c60d3e7b8a 1269 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_SSL_CA, "SSL CA" );
maclobdell 0:f7c60d3e7b8a 1270 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_EMAIL_CA, "Email CA" );
maclobdell 0:f7c60d3e7b8a 1271 CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING_CA, "Object Signing CA" );
maclobdell 0:f7c60d3e7b8a 1272
maclobdell 0:f7c60d3e7b8a 1273 *size = n;
maclobdell 0:f7c60d3e7b8a 1274 *buf = p;
maclobdell 0:f7c60d3e7b8a 1275
maclobdell 0:f7c60d3e7b8a 1276 return( 0 );
maclobdell 0:f7c60d3e7b8a 1277 }
maclobdell 0:f7c60d3e7b8a 1278
maclobdell 0:f7c60d3e7b8a 1279 #define KEY_USAGE(code,name) \
maclobdell 0:f7c60d3e7b8a 1280 if( key_usage & code ) \
maclobdell 0:f7c60d3e7b8a 1281 PRINT_ITEM( name );
maclobdell 0:f7c60d3e7b8a 1282
maclobdell 0:f7c60d3e7b8a 1283 static int x509_info_key_usage( char **buf, size_t *size,
maclobdell 0:f7c60d3e7b8a 1284 unsigned int key_usage )
maclobdell 0:f7c60d3e7b8a 1285 {
maclobdell 0:f7c60d3e7b8a 1286 int ret;
maclobdell 0:f7c60d3e7b8a 1287 size_t n = *size;
maclobdell 0:f7c60d3e7b8a 1288 char *p = *buf;
maclobdell 0:f7c60d3e7b8a 1289 const char *sep = "";
maclobdell 0:f7c60d3e7b8a 1290
maclobdell 0:f7c60d3e7b8a 1291 KEY_USAGE( MBEDTLS_X509_KU_DIGITAL_SIGNATURE, "Digital Signature" );
maclobdell 0:f7c60d3e7b8a 1292 KEY_USAGE( MBEDTLS_X509_KU_NON_REPUDIATION, "Non Repudiation" );
maclobdell 0:f7c60d3e7b8a 1293 KEY_USAGE( MBEDTLS_X509_KU_KEY_ENCIPHERMENT, "Key Encipherment" );
maclobdell 0:f7c60d3e7b8a 1294 KEY_USAGE( MBEDTLS_X509_KU_DATA_ENCIPHERMENT, "Data Encipherment" );
maclobdell 0:f7c60d3e7b8a 1295 KEY_USAGE( MBEDTLS_X509_KU_KEY_AGREEMENT, "Key Agreement" );
maclobdell 0:f7c60d3e7b8a 1296 KEY_USAGE( MBEDTLS_X509_KU_KEY_CERT_SIGN, "Key Cert Sign" );
maclobdell 0:f7c60d3e7b8a 1297 KEY_USAGE( MBEDTLS_X509_KU_CRL_SIGN, "CRL Sign" );
maclobdell 0:f7c60d3e7b8a 1298 KEY_USAGE( MBEDTLS_X509_KU_ENCIPHER_ONLY, "Encipher Only" );
maclobdell 0:f7c60d3e7b8a 1299 KEY_USAGE( MBEDTLS_X509_KU_DECIPHER_ONLY, "Decipher Only" );
maclobdell 0:f7c60d3e7b8a 1300
maclobdell 0:f7c60d3e7b8a 1301 *size = n;
maclobdell 0:f7c60d3e7b8a 1302 *buf = p;
maclobdell 0:f7c60d3e7b8a 1303
maclobdell 0:f7c60d3e7b8a 1304 return( 0 );
maclobdell 0:f7c60d3e7b8a 1305 }
maclobdell 0:f7c60d3e7b8a 1306
maclobdell 0:f7c60d3e7b8a 1307 static int x509_info_ext_key_usage( char **buf, size_t *size,
maclobdell 0:f7c60d3e7b8a 1308 const mbedtls_x509_sequence *extended_key_usage )
maclobdell 0:f7c60d3e7b8a 1309 {
maclobdell 0:f7c60d3e7b8a 1310 int ret;
maclobdell 0:f7c60d3e7b8a 1311 const char *desc;
maclobdell 0:f7c60d3e7b8a 1312 size_t n = *size;
maclobdell 0:f7c60d3e7b8a 1313 char *p = *buf;
maclobdell 0:f7c60d3e7b8a 1314 const mbedtls_x509_sequence *cur = extended_key_usage;
maclobdell 0:f7c60d3e7b8a 1315 const char *sep = "";
maclobdell 0:f7c60d3e7b8a 1316
maclobdell 0:f7c60d3e7b8a 1317 while( cur != NULL )
maclobdell 0:f7c60d3e7b8a 1318 {
maclobdell 0:f7c60d3e7b8a 1319 if( mbedtls_oid_get_extended_key_usage( &cur->buf, &desc ) != 0 )
maclobdell 0:f7c60d3e7b8a 1320 desc = "???";
maclobdell 0:f7c60d3e7b8a 1321
maclobdell 0:f7c60d3e7b8a 1322 ret = mbedtls_snprintf( p, n, "%s%s", sep, desc );
maclobdell 0:f7c60d3e7b8a 1323 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1324
maclobdell 0:f7c60d3e7b8a 1325 sep = ", ";
maclobdell 0:f7c60d3e7b8a 1326
maclobdell 0:f7c60d3e7b8a 1327 cur = cur->next;
maclobdell 0:f7c60d3e7b8a 1328 }
maclobdell 0:f7c60d3e7b8a 1329
maclobdell 0:f7c60d3e7b8a 1330 *size = n;
maclobdell 0:f7c60d3e7b8a 1331 *buf = p;
maclobdell 0:f7c60d3e7b8a 1332
maclobdell 0:f7c60d3e7b8a 1333 return( 0 );
maclobdell 0:f7c60d3e7b8a 1334 }
maclobdell 0:f7c60d3e7b8a 1335
maclobdell 0:f7c60d3e7b8a 1336 /*
maclobdell 0:f7c60d3e7b8a 1337 * Return an informational string about the certificate.
maclobdell 0:f7c60d3e7b8a 1338 */
maclobdell 0:f7c60d3e7b8a 1339 #define BEFORE_COLON 18
maclobdell 0:f7c60d3e7b8a 1340 #define BC "18"
maclobdell 0:f7c60d3e7b8a 1341 int mbedtls_x509_crt_info( char *buf, size_t size, const char *prefix,
maclobdell 0:f7c60d3e7b8a 1342 const mbedtls_x509_crt *crt )
maclobdell 0:f7c60d3e7b8a 1343 {
maclobdell 0:f7c60d3e7b8a 1344 int ret;
maclobdell 0:f7c60d3e7b8a 1345 size_t n;
maclobdell 0:f7c60d3e7b8a 1346 char *p;
maclobdell 0:f7c60d3e7b8a 1347 char key_size_str[BEFORE_COLON];
maclobdell 0:f7c60d3e7b8a 1348
maclobdell 0:f7c60d3e7b8a 1349 p = buf;
maclobdell 0:f7c60d3e7b8a 1350 n = size;
maclobdell 0:f7c60d3e7b8a 1351
maclobdell 0:f7c60d3e7b8a 1352 ret = mbedtls_snprintf( p, n, "%scert. version : %d\n",
maclobdell 0:f7c60d3e7b8a 1353 prefix, crt->version );
maclobdell 0:f7c60d3e7b8a 1354 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1355 ret = mbedtls_snprintf( p, n, "%sserial number : ",
maclobdell 0:f7c60d3e7b8a 1356 prefix );
maclobdell 0:f7c60d3e7b8a 1357 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1358
maclobdell 0:f7c60d3e7b8a 1359 ret = mbedtls_x509_serial_gets( p, n, &crt->serial );
maclobdell 0:f7c60d3e7b8a 1360 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1361
maclobdell 0:f7c60d3e7b8a 1362 ret = mbedtls_snprintf( p, n, "\n%sissuer name : ", prefix );
maclobdell 0:f7c60d3e7b8a 1363 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1364 ret = mbedtls_x509_dn_gets( p, n, &crt->issuer );
maclobdell 0:f7c60d3e7b8a 1365 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1366
maclobdell 0:f7c60d3e7b8a 1367 ret = mbedtls_snprintf( p, n, "\n%ssubject name : ", prefix );
maclobdell 0:f7c60d3e7b8a 1368 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1369 ret = mbedtls_x509_dn_gets( p, n, &crt->subject );
maclobdell 0:f7c60d3e7b8a 1370 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1371
maclobdell 0:f7c60d3e7b8a 1372 ret = mbedtls_snprintf( p, n, "\n%sissued on : " \
maclobdell 0:f7c60d3e7b8a 1373 "%04d-%02d-%02d %02d:%02d:%02d", prefix,
maclobdell 0:f7c60d3e7b8a 1374 crt->valid_from.year, crt->valid_from.mon,
maclobdell 0:f7c60d3e7b8a 1375 crt->valid_from.day, crt->valid_from.hour,
maclobdell 0:f7c60d3e7b8a 1376 crt->valid_from.min, crt->valid_from.sec );
maclobdell 0:f7c60d3e7b8a 1377 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1378
maclobdell 0:f7c60d3e7b8a 1379 ret = mbedtls_snprintf( p, n, "\n%sexpires on : " \
maclobdell 0:f7c60d3e7b8a 1380 "%04d-%02d-%02d %02d:%02d:%02d", prefix,
maclobdell 0:f7c60d3e7b8a 1381 crt->valid_to.year, crt->valid_to.mon,
maclobdell 0:f7c60d3e7b8a 1382 crt->valid_to.day, crt->valid_to.hour,
maclobdell 0:f7c60d3e7b8a 1383 crt->valid_to.min, crt->valid_to.sec );
maclobdell 0:f7c60d3e7b8a 1384 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1385
maclobdell 0:f7c60d3e7b8a 1386 ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix );
maclobdell 0:f7c60d3e7b8a 1387 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1388
maclobdell 0:f7c60d3e7b8a 1389 ret = mbedtls_x509_sig_alg_gets( p, n, &crt->sig_oid, crt->sig_pk,
maclobdell 0:f7c60d3e7b8a 1390 crt->sig_md, crt->sig_opts );
maclobdell 0:f7c60d3e7b8a 1391 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1392
maclobdell 0:f7c60d3e7b8a 1393 /* Key size */
maclobdell 0:f7c60d3e7b8a 1394 if( ( ret = mbedtls_x509_key_size_helper( key_size_str, BEFORE_COLON,
maclobdell 0:f7c60d3e7b8a 1395 mbedtls_pk_get_name( &crt->pk ) ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 1396 {
maclobdell 0:f7c60d3e7b8a 1397 return( ret );
maclobdell 0:f7c60d3e7b8a 1398 }
maclobdell 0:f7c60d3e7b8a 1399
maclobdell 0:f7c60d3e7b8a 1400 ret = mbedtls_snprintf( p, n, "\n%s%-" BC "s: %d bits", prefix, key_size_str,
maclobdell 0:f7c60d3e7b8a 1401 (int) mbedtls_pk_get_bitlen( &crt->pk ) );
maclobdell 0:f7c60d3e7b8a 1402 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1403
maclobdell 0:f7c60d3e7b8a 1404 /*
maclobdell 0:f7c60d3e7b8a 1405 * Optional extensions
maclobdell 0:f7c60d3e7b8a 1406 */
maclobdell 0:f7c60d3e7b8a 1407
maclobdell 0:f7c60d3e7b8a 1408 if( crt->ext_types & MBEDTLS_X509_EXT_BASIC_CONSTRAINTS )
maclobdell 0:f7c60d3e7b8a 1409 {
maclobdell 0:f7c60d3e7b8a 1410 ret = mbedtls_snprintf( p, n, "\n%sbasic constraints : CA=%s", prefix,
maclobdell 0:f7c60d3e7b8a 1411 crt->ca_istrue ? "true" : "false" );
maclobdell 0:f7c60d3e7b8a 1412 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1413
maclobdell 0:f7c60d3e7b8a 1414 if( crt->max_pathlen > 0 )
maclobdell 0:f7c60d3e7b8a 1415 {
maclobdell 0:f7c60d3e7b8a 1416 ret = mbedtls_snprintf( p, n, ", max_pathlen=%d", crt->max_pathlen - 1 );
maclobdell 0:f7c60d3e7b8a 1417 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1418 }
maclobdell 0:f7c60d3e7b8a 1419 }
maclobdell 0:f7c60d3e7b8a 1420
maclobdell 0:f7c60d3e7b8a 1421 if( crt->ext_types & MBEDTLS_X509_EXT_SUBJECT_ALT_NAME )
maclobdell 0:f7c60d3e7b8a 1422 {
maclobdell 0:f7c60d3e7b8a 1423 ret = mbedtls_snprintf( p, n, "\n%ssubject alt name : ", prefix );
maclobdell 0:f7c60d3e7b8a 1424 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1425
maclobdell 0:f7c60d3e7b8a 1426 if( ( ret = x509_info_subject_alt_name( &p, &n,
maclobdell 0:f7c60d3e7b8a 1427 &crt->subject_alt_names ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 1428 return( ret );
maclobdell 0:f7c60d3e7b8a 1429 }
maclobdell 0:f7c60d3e7b8a 1430
maclobdell 0:f7c60d3e7b8a 1431 if( crt->ext_types & MBEDTLS_X509_EXT_NS_CERT_TYPE )
maclobdell 0:f7c60d3e7b8a 1432 {
maclobdell 0:f7c60d3e7b8a 1433 ret = mbedtls_snprintf( p, n, "\n%scert. type : ", prefix );
maclobdell 0:f7c60d3e7b8a 1434 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1435
maclobdell 0:f7c60d3e7b8a 1436 if( ( ret = x509_info_cert_type( &p, &n, crt->ns_cert_type ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 1437 return( ret );
maclobdell 0:f7c60d3e7b8a 1438 }
maclobdell 0:f7c60d3e7b8a 1439
maclobdell 0:f7c60d3e7b8a 1440 if( crt->ext_types & MBEDTLS_X509_EXT_KEY_USAGE )
maclobdell 0:f7c60d3e7b8a 1441 {
maclobdell 0:f7c60d3e7b8a 1442 ret = mbedtls_snprintf( p, n, "\n%skey usage : ", prefix );
maclobdell 0:f7c60d3e7b8a 1443 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1444
maclobdell 0:f7c60d3e7b8a 1445 if( ( ret = x509_info_key_usage( &p, &n, crt->key_usage ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 1446 return( ret );
maclobdell 0:f7c60d3e7b8a 1447 }
maclobdell 0:f7c60d3e7b8a 1448
maclobdell 0:f7c60d3e7b8a 1449 if( crt->ext_types & MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE )
maclobdell 0:f7c60d3e7b8a 1450 {
maclobdell 0:f7c60d3e7b8a 1451 ret = mbedtls_snprintf( p, n, "\n%sext key usage : ", prefix );
maclobdell 0:f7c60d3e7b8a 1452 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1453
maclobdell 0:f7c60d3e7b8a 1454 if( ( ret = x509_info_ext_key_usage( &p, &n,
maclobdell 0:f7c60d3e7b8a 1455 &crt->ext_key_usage ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 1456 return( ret );
maclobdell 0:f7c60d3e7b8a 1457 }
maclobdell 0:f7c60d3e7b8a 1458
maclobdell 0:f7c60d3e7b8a 1459 ret = mbedtls_snprintf( p, n, "\n" );
maclobdell 0:f7c60d3e7b8a 1460 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1461
maclobdell 0:f7c60d3e7b8a 1462 return( (int) ( size - n ) );
maclobdell 0:f7c60d3e7b8a 1463 }
maclobdell 0:f7c60d3e7b8a 1464
maclobdell 0:f7c60d3e7b8a 1465 struct x509_crt_verify_string {
maclobdell 0:f7c60d3e7b8a 1466 int code;
maclobdell 0:f7c60d3e7b8a 1467 const char *string;
maclobdell 0:f7c60d3e7b8a 1468 };
maclobdell 0:f7c60d3e7b8a 1469
maclobdell 0:f7c60d3e7b8a 1470 static const struct x509_crt_verify_string x509_crt_verify_strings[] = {
maclobdell 0:f7c60d3e7b8a 1471 { MBEDTLS_X509_BADCERT_EXPIRED, "The certificate validity has expired" },
maclobdell 0:f7c60d3e7b8a 1472 { MBEDTLS_X509_BADCERT_REVOKED, "The certificate has been revoked (is on a CRL)" },
maclobdell 0:f7c60d3e7b8a 1473 { MBEDTLS_X509_BADCERT_CN_MISMATCH, "The certificate Common Name (CN) does not match with the expected CN" },
maclobdell 0:f7c60d3e7b8a 1474 { MBEDTLS_X509_BADCERT_NOT_TRUSTED, "The certificate is not correctly signed by the trusted CA" },
maclobdell 0:f7c60d3e7b8a 1475 { MBEDTLS_X509_BADCRL_NOT_TRUSTED, "The CRL is not correctly signed by the trusted CA" },
maclobdell 0:f7c60d3e7b8a 1476 { MBEDTLS_X509_BADCRL_EXPIRED, "The CRL is expired" },
maclobdell 0:f7c60d3e7b8a 1477 { MBEDTLS_X509_BADCERT_MISSING, "Certificate was missing" },
maclobdell 0:f7c60d3e7b8a 1478 { MBEDTLS_X509_BADCERT_SKIP_VERIFY, "Certificate verification was skipped" },
maclobdell 0:f7c60d3e7b8a 1479 { MBEDTLS_X509_BADCERT_OTHER, "Other reason (can be used by verify callback)" },
maclobdell 0:f7c60d3e7b8a 1480 { MBEDTLS_X509_BADCERT_FUTURE, "The certificate validity starts in the future" },
maclobdell 0:f7c60d3e7b8a 1481 { MBEDTLS_X509_BADCRL_FUTURE, "The CRL is from the future" },
maclobdell 0:f7c60d3e7b8a 1482 { MBEDTLS_X509_BADCERT_KEY_USAGE, "Usage does not match the keyUsage extension" },
maclobdell 0:f7c60d3e7b8a 1483 { MBEDTLS_X509_BADCERT_EXT_KEY_USAGE, "Usage does not match the extendedKeyUsage extension" },
maclobdell 0:f7c60d3e7b8a 1484 { MBEDTLS_X509_BADCERT_NS_CERT_TYPE, "Usage does not match the nsCertType extension" },
maclobdell 0:f7c60d3e7b8a 1485 { MBEDTLS_X509_BADCERT_BAD_MD, "The certificate is signed with an unacceptable hash." },
maclobdell 0:f7c60d3e7b8a 1486 { MBEDTLS_X509_BADCERT_BAD_PK, "The certificate is signed with an unacceptable PK alg (eg RSA vs ECDSA)." },
maclobdell 0:f7c60d3e7b8a 1487 { MBEDTLS_X509_BADCERT_BAD_KEY, "The certificate is signed with an unacceptable key (eg bad curve, RSA too short)." },
maclobdell 0:f7c60d3e7b8a 1488 { MBEDTLS_X509_BADCRL_BAD_MD, "The CRL is signed with an unacceptable hash." },
maclobdell 0:f7c60d3e7b8a 1489 { MBEDTLS_X509_BADCRL_BAD_PK, "The CRL is signed with an unacceptable PK alg (eg RSA vs ECDSA)." },
maclobdell 0:f7c60d3e7b8a 1490 { MBEDTLS_X509_BADCRL_BAD_KEY, "The CRL is signed with an unacceptable key (eg bad curve, RSA too short)." },
maclobdell 0:f7c60d3e7b8a 1491 { 0, NULL }
maclobdell 0:f7c60d3e7b8a 1492 };
maclobdell 0:f7c60d3e7b8a 1493
maclobdell 0:f7c60d3e7b8a 1494 int mbedtls_x509_crt_verify_info( char *buf, size_t size, const char *prefix,
maclobdell 0:f7c60d3e7b8a 1495 uint32_t flags )
maclobdell 0:f7c60d3e7b8a 1496 {
maclobdell 0:f7c60d3e7b8a 1497 int ret;
maclobdell 0:f7c60d3e7b8a 1498 const struct x509_crt_verify_string *cur;
maclobdell 0:f7c60d3e7b8a 1499 char *p = buf;
maclobdell 0:f7c60d3e7b8a 1500 size_t n = size;
maclobdell 0:f7c60d3e7b8a 1501
maclobdell 0:f7c60d3e7b8a 1502 for( cur = x509_crt_verify_strings; cur->string != NULL ; cur++ )
maclobdell 0:f7c60d3e7b8a 1503 {
maclobdell 0:f7c60d3e7b8a 1504 if( ( flags & cur->code ) == 0 )
maclobdell 0:f7c60d3e7b8a 1505 continue;
maclobdell 0:f7c60d3e7b8a 1506
maclobdell 0:f7c60d3e7b8a 1507 ret = mbedtls_snprintf( p, n, "%s%s\n", prefix, cur->string );
maclobdell 0:f7c60d3e7b8a 1508 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1509 flags ^= cur->code;
maclobdell 0:f7c60d3e7b8a 1510 }
maclobdell 0:f7c60d3e7b8a 1511
maclobdell 0:f7c60d3e7b8a 1512 if( flags != 0 )
maclobdell 0:f7c60d3e7b8a 1513 {
maclobdell 0:f7c60d3e7b8a 1514 ret = mbedtls_snprintf( p, n, "%sUnknown reason "
maclobdell 0:f7c60d3e7b8a 1515 "(this should not happen)\n", prefix );
maclobdell 0:f7c60d3e7b8a 1516 MBEDTLS_X509_SAFE_SNPRINTF;
maclobdell 0:f7c60d3e7b8a 1517 }
maclobdell 0:f7c60d3e7b8a 1518
maclobdell 0:f7c60d3e7b8a 1519 return( (int) ( size - n ) );
maclobdell 0:f7c60d3e7b8a 1520 }
maclobdell 0:f7c60d3e7b8a 1521
maclobdell 0:f7c60d3e7b8a 1522 #if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
maclobdell 0:f7c60d3e7b8a 1523 int mbedtls_x509_crt_check_key_usage( const mbedtls_x509_crt *crt,
maclobdell 0:f7c60d3e7b8a 1524 unsigned int usage )
maclobdell 0:f7c60d3e7b8a 1525 {
maclobdell 0:f7c60d3e7b8a 1526 unsigned int usage_must, usage_may;
maclobdell 0:f7c60d3e7b8a 1527 unsigned int may_mask = MBEDTLS_X509_KU_ENCIPHER_ONLY
maclobdell 0:f7c60d3e7b8a 1528 | MBEDTLS_X509_KU_DECIPHER_ONLY;
maclobdell 0:f7c60d3e7b8a 1529
maclobdell 0:f7c60d3e7b8a 1530 if( ( crt->ext_types & MBEDTLS_X509_EXT_KEY_USAGE ) == 0 )
maclobdell 0:f7c60d3e7b8a 1531 return( 0 );
maclobdell 0:f7c60d3e7b8a 1532
maclobdell 0:f7c60d3e7b8a 1533 usage_must = usage & ~may_mask;
maclobdell 0:f7c60d3e7b8a 1534
maclobdell 0:f7c60d3e7b8a 1535 if( ( ( crt->key_usage & ~may_mask ) & usage_must ) != usage_must )
maclobdell 0:f7c60d3e7b8a 1536 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 1537
maclobdell 0:f7c60d3e7b8a 1538 usage_may = usage & may_mask;
maclobdell 0:f7c60d3e7b8a 1539
maclobdell 0:f7c60d3e7b8a 1540 if( ( ( crt->key_usage & may_mask ) | usage_may ) != usage_may )
maclobdell 0:f7c60d3e7b8a 1541 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 1542
maclobdell 0:f7c60d3e7b8a 1543 return( 0 );
maclobdell 0:f7c60d3e7b8a 1544 }
maclobdell 0:f7c60d3e7b8a 1545 #endif
maclobdell 0:f7c60d3e7b8a 1546
maclobdell 0:f7c60d3e7b8a 1547 #if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
maclobdell 0:f7c60d3e7b8a 1548 int mbedtls_x509_crt_check_extended_key_usage( const mbedtls_x509_crt *crt,
maclobdell 0:f7c60d3e7b8a 1549 const char *usage_oid,
maclobdell 0:f7c60d3e7b8a 1550 size_t usage_len )
maclobdell 0:f7c60d3e7b8a 1551 {
maclobdell 0:f7c60d3e7b8a 1552 const mbedtls_x509_sequence *cur;
maclobdell 0:f7c60d3e7b8a 1553
maclobdell 0:f7c60d3e7b8a 1554 /* Extension is not mandatory, absent means no restriction */
maclobdell 0:f7c60d3e7b8a 1555 if( ( crt->ext_types & MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE ) == 0 )
maclobdell 0:f7c60d3e7b8a 1556 return( 0 );
maclobdell 0:f7c60d3e7b8a 1557
maclobdell 0:f7c60d3e7b8a 1558 /*
maclobdell 0:f7c60d3e7b8a 1559 * Look for the requested usage (or wildcard ANY) in our list
maclobdell 0:f7c60d3e7b8a 1560 */
maclobdell 0:f7c60d3e7b8a 1561 for( cur = &crt->ext_key_usage; cur != NULL; cur = cur->next )
maclobdell 0:f7c60d3e7b8a 1562 {
maclobdell 0:f7c60d3e7b8a 1563 const mbedtls_x509_buf *cur_oid = &cur->buf;
maclobdell 0:f7c60d3e7b8a 1564
maclobdell 0:f7c60d3e7b8a 1565 if( cur_oid->len == usage_len &&
maclobdell 0:f7c60d3e7b8a 1566 memcmp( cur_oid->p, usage_oid, usage_len ) == 0 )
maclobdell 0:f7c60d3e7b8a 1567 {
maclobdell 0:f7c60d3e7b8a 1568 return( 0 );
maclobdell 0:f7c60d3e7b8a 1569 }
maclobdell 0:f7c60d3e7b8a 1570
maclobdell 0:f7c60d3e7b8a 1571 if( MBEDTLS_OID_CMP( MBEDTLS_OID_ANY_EXTENDED_KEY_USAGE, cur_oid ) == 0 )
maclobdell 0:f7c60d3e7b8a 1572 return( 0 );
maclobdell 0:f7c60d3e7b8a 1573 }
maclobdell 0:f7c60d3e7b8a 1574
maclobdell 0:f7c60d3e7b8a 1575 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 1576 }
maclobdell 0:f7c60d3e7b8a 1577 #endif /* MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE */
maclobdell 0:f7c60d3e7b8a 1578
maclobdell 0:f7c60d3e7b8a 1579 #if defined(MBEDTLS_X509_CRL_PARSE_C)
maclobdell 0:f7c60d3e7b8a 1580 /*
maclobdell 0:f7c60d3e7b8a 1581 * Return 1 if the certificate is revoked, or 0 otherwise.
maclobdell 0:f7c60d3e7b8a 1582 */
maclobdell 0:f7c60d3e7b8a 1583 int mbedtls_x509_crt_is_revoked( const mbedtls_x509_crt *crt, const mbedtls_x509_crl *crl )
maclobdell 0:f7c60d3e7b8a 1584 {
maclobdell 0:f7c60d3e7b8a 1585 const mbedtls_x509_crl_entry *cur = &crl->entry;
maclobdell 0:f7c60d3e7b8a 1586
maclobdell 0:f7c60d3e7b8a 1587 while( cur != NULL && cur->serial.len != 0 )
maclobdell 0:f7c60d3e7b8a 1588 {
maclobdell 0:f7c60d3e7b8a 1589 if( crt->serial.len == cur->serial.len &&
maclobdell 0:f7c60d3e7b8a 1590 memcmp( crt->serial.p, cur->serial.p, crt->serial.len ) == 0 )
maclobdell 0:f7c60d3e7b8a 1591 {
maclobdell 0:f7c60d3e7b8a 1592 if( mbedtls_x509_time_is_past( &cur->revocation_date ) )
maclobdell 0:f7c60d3e7b8a 1593 return( 1 );
maclobdell 0:f7c60d3e7b8a 1594 }
maclobdell 0:f7c60d3e7b8a 1595
maclobdell 0:f7c60d3e7b8a 1596 cur = cur->next;
maclobdell 0:f7c60d3e7b8a 1597 }
maclobdell 0:f7c60d3e7b8a 1598
maclobdell 0:f7c60d3e7b8a 1599 return( 0 );
maclobdell 0:f7c60d3e7b8a 1600 }
maclobdell 0:f7c60d3e7b8a 1601
maclobdell 0:f7c60d3e7b8a 1602 /*
maclobdell 0:f7c60d3e7b8a 1603 * Check that the given certificate is valid according to the CRL.
maclobdell 0:f7c60d3e7b8a 1604 */
maclobdell 0:f7c60d3e7b8a 1605 static int x509_crt_verifycrl( mbedtls_x509_crt *crt, mbedtls_x509_crt *ca,
maclobdell 0:f7c60d3e7b8a 1606 mbedtls_x509_crl *crl_list,
maclobdell 0:f7c60d3e7b8a 1607 const mbedtls_x509_crt_profile *profile )
maclobdell 0:f7c60d3e7b8a 1608 {
maclobdell 0:f7c60d3e7b8a 1609 int flags = 0;
maclobdell 0:f7c60d3e7b8a 1610 unsigned char hash[MBEDTLS_MD_MAX_SIZE];
maclobdell 0:f7c60d3e7b8a 1611 const mbedtls_md_info_t *md_info;
maclobdell 0:f7c60d3e7b8a 1612
maclobdell 0:f7c60d3e7b8a 1613 if( ca == NULL )
maclobdell 0:f7c60d3e7b8a 1614 return( flags );
maclobdell 0:f7c60d3e7b8a 1615
maclobdell 0:f7c60d3e7b8a 1616 /*
maclobdell 0:f7c60d3e7b8a 1617 * TODO: What happens if no CRL is present?
maclobdell 0:f7c60d3e7b8a 1618 * Suggestion: Revocation state should be unknown if no CRL is present.
maclobdell 0:f7c60d3e7b8a 1619 * For backwards compatibility this is not yet implemented.
maclobdell 0:f7c60d3e7b8a 1620 */
maclobdell 0:f7c60d3e7b8a 1621
maclobdell 0:f7c60d3e7b8a 1622 while( crl_list != NULL )
maclobdell 0:f7c60d3e7b8a 1623 {
maclobdell 0:f7c60d3e7b8a 1624 if( crl_list->version == 0 ||
maclobdell 0:f7c60d3e7b8a 1625 crl_list->issuer_raw.len != ca->subject_raw.len ||
maclobdell 0:f7c60d3e7b8a 1626 memcmp( crl_list->issuer_raw.p, ca->subject_raw.p,
maclobdell 0:f7c60d3e7b8a 1627 crl_list->issuer_raw.len ) != 0 )
maclobdell 0:f7c60d3e7b8a 1628 {
maclobdell 0:f7c60d3e7b8a 1629 crl_list = crl_list->next;
maclobdell 0:f7c60d3e7b8a 1630 continue;
maclobdell 0:f7c60d3e7b8a 1631 }
maclobdell 0:f7c60d3e7b8a 1632
maclobdell 0:f7c60d3e7b8a 1633 /*
maclobdell 0:f7c60d3e7b8a 1634 * Check if the CA is configured to sign CRLs
maclobdell 0:f7c60d3e7b8a 1635 */
maclobdell 0:f7c60d3e7b8a 1636 #if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
maclobdell 0:f7c60d3e7b8a 1637 if( mbedtls_x509_crt_check_key_usage( ca, MBEDTLS_X509_KU_CRL_SIGN ) != 0 )
maclobdell 0:f7c60d3e7b8a 1638 {
maclobdell 0:f7c60d3e7b8a 1639 flags |= MBEDTLS_X509_BADCRL_NOT_TRUSTED;
maclobdell 0:f7c60d3e7b8a 1640 break;
maclobdell 0:f7c60d3e7b8a 1641 }
maclobdell 0:f7c60d3e7b8a 1642 #endif
maclobdell 0:f7c60d3e7b8a 1643
maclobdell 0:f7c60d3e7b8a 1644 /*
maclobdell 0:f7c60d3e7b8a 1645 * Check if CRL is correctly signed by the trusted CA
maclobdell 0:f7c60d3e7b8a 1646 */
maclobdell 0:f7c60d3e7b8a 1647 if( x509_profile_check_md_alg( profile, crl_list->sig_md ) != 0 )
maclobdell 0:f7c60d3e7b8a 1648 flags |= MBEDTLS_X509_BADCRL_BAD_MD;
maclobdell 0:f7c60d3e7b8a 1649
maclobdell 0:f7c60d3e7b8a 1650 if( x509_profile_check_pk_alg( profile, crl_list->sig_pk ) != 0 )
maclobdell 0:f7c60d3e7b8a 1651 flags |= MBEDTLS_X509_BADCRL_BAD_PK;
maclobdell 0:f7c60d3e7b8a 1652
maclobdell 0:f7c60d3e7b8a 1653 md_info = mbedtls_md_info_from_type( crl_list->sig_md );
maclobdell 0:f7c60d3e7b8a 1654 if( md_info == NULL )
maclobdell 0:f7c60d3e7b8a 1655 {
maclobdell 0:f7c60d3e7b8a 1656 /*
maclobdell 0:f7c60d3e7b8a 1657 * Cannot check 'unknown' hash
maclobdell 0:f7c60d3e7b8a 1658 */
maclobdell 0:f7c60d3e7b8a 1659 flags |= MBEDTLS_X509_BADCRL_NOT_TRUSTED;
maclobdell 0:f7c60d3e7b8a 1660 break;
maclobdell 0:f7c60d3e7b8a 1661 }
maclobdell 0:f7c60d3e7b8a 1662
maclobdell 0:f7c60d3e7b8a 1663 mbedtls_md( md_info, crl_list->tbs.p, crl_list->tbs.len, hash );
maclobdell 0:f7c60d3e7b8a 1664
maclobdell 0:f7c60d3e7b8a 1665 if( x509_profile_check_key( profile, crl_list->sig_pk, &ca->pk ) != 0 )
maclobdell 0:f7c60d3e7b8a 1666 flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
maclobdell 0:f7c60d3e7b8a 1667
maclobdell 0:f7c60d3e7b8a 1668 if( mbedtls_pk_verify_ext( crl_list->sig_pk, crl_list->sig_opts, &ca->pk,
maclobdell 0:f7c60d3e7b8a 1669 crl_list->sig_md, hash, mbedtls_md_get_size( md_info ),
maclobdell 0:f7c60d3e7b8a 1670 crl_list->sig.p, crl_list->sig.len ) != 0 )
maclobdell 0:f7c60d3e7b8a 1671 {
maclobdell 0:f7c60d3e7b8a 1672 flags |= MBEDTLS_X509_BADCRL_NOT_TRUSTED;
maclobdell 0:f7c60d3e7b8a 1673 break;
maclobdell 0:f7c60d3e7b8a 1674 }
maclobdell 0:f7c60d3e7b8a 1675
maclobdell 0:f7c60d3e7b8a 1676 /*
maclobdell 0:f7c60d3e7b8a 1677 * Check for validity of CRL (Do not drop out)
maclobdell 0:f7c60d3e7b8a 1678 */
maclobdell 0:f7c60d3e7b8a 1679 if( mbedtls_x509_time_is_past( &crl_list->next_update ) )
maclobdell 0:f7c60d3e7b8a 1680 flags |= MBEDTLS_X509_BADCRL_EXPIRED;
maclobdell 0:f7c60d3e7b8a 1681
maclobdell 0:f7c60d3e7b8a 1682 if( mbedtls_x509_time_is_future( &crl_list->this_update ) )
maclobdell 0:f7c60d3e7b8a 1683 flags |= MBEDTLS_X509_BADCRL_FUTURE;
maclobdell 0:f7c60d3e7b8a 1684
maclobdell 0:f7c60d3e7b8a 1685 /*
maclobdell 0:f7c60d3e7b8a 1686 * Check if certificate is revoked
maclobdell 0:f7c60d3e7b8a 1687 */
maclobdell 0:f7c60d3e7b8a 1688 if( mbedtls_x509_crt_is_revoked( crt, crl_list ) )
maclobdell 0:f7c60d3e7b8a 1689 {
maclobdell 0:f7c60d3e7b8a 1690 flags |= MBEDTLS_X509_BADCERT_REVOKED;
maclobdell 0:f7c60d3e7b8a 1691 break;
maclobdell 0:f7c60d3e7b8a 1692 }
maclobdell 0:f7c60d3e7b8a 1693
maclobdell 0:f7c60d3e7b8a 1694 crl_list = crl_list->next;
maclobdell 0:f7c60d3e7b8a 1695 }
maclobdell 0:f7c60d3e7b8a 1696
maclobdell 0:f7c60d3e7b8a 1697 return( flags );
maclobdell 0:f7c60d3e7b8a 1698 }
maclobdell 0:f7c60d3e7b8a 1699 #endif /* MBEDTLS_X509_CRL_PARSE_C */
maclobdell 0:f7c60d3e7b8a 1700
maclobdell 0:f7c60d3e7b8a 1701 /*
maclobdell 0:f7c60d3e7b8a 1702 * Like memcmp, but case-insensitive and always returns -1 if different
maclobdell 0:f7c60d3e7b8a 1703 */
maclobdell 0:f7c60d3e7b8a 1704 static int x509_memcasecmp( const void *s1, const void *s2, size_t len )
maclobdell 0:f7c60d3e7b8a 1705 {
maclobdell 0:f7c60d3e7b8a 1706 size_t i;
maclobdell 0:f7c60d3e7b8a 1707 unsigned char diff;
maclobdell 0:f7c60d3e7b8a 1708 const unsigned char *n1 = s1, *n2 = s2;
maclobdell 0:f7c60d3e7b8a 1709
maclobdell 0:f7c60d3e7b8a 1710 for( i = 0; i < len; i++ )
maclobdell 0:f7c60d3e7b8a 1711 {
maclobdell 0:f7c60d3e7b8a 1712 diff = n1[i] ^ n2[i];
maclobdell 0:f7c60d3e7b8a 1713
maclobdell 0:f7c60d3e7b8a 1714 if( diff == 0 )
maclobdell 0:f7c60d3e7b8a 1715 continue;
maclobdell 0:f7c60d3e7b8a 1716
maclobdell 0:f7c60d3e7b8a 1717 if( diff == 32 &&
maclobdell 0:f7c60d3e7b8a 1718 ( ( n1[i] >= 'a' && n1[i] <= 'z' ) ||
maclobdell 0:f7c60d3e7b8a 1719 ( n1[i] >= 'A' && n1[i] <= 'Z' ) ) )
maclobdell 0:f7c60d3e7b8a 1720 {
maclobdell 0:f7c60d3e7b8a 1721 continue;
maclobdell 0:f7c60d3e7b8a 1722 }
maclobdell 0:f7c60d3e7b8a 1723
maclobdell 0:f7c60d3e7b8a 1724 return( -1 );
maclobdell 0:f7c60d3e7b8a 1725 }
maclobdell 0:f7c60d3e7b8a 1726
maclobdell 0:f7c60d3e7b8a 1727 return( 0 );
maclobdell 0:f7c60d3e7b8a 1728 }
maclobdell 0:f7c60d3e7b8a 1729
maclobdell 0:f7c60d3e7b8a 1730 /*
maclobdell 0:f7c60d3e7b8a 1731 * Return 0 if name matches wildcard, -1 otherwise
maclobdell 0:f7c60d3e7b8a 1732 */
maclobdell 0:f7c60d3e7b8a 1733 static int x509_check_wildcard( const char *cn, mbedtls_x509_buf *name )
maclobdell 0:f7c60d3e7b8a 1734 {
maclobdell 0:f7c60d3e7b8a 1735 size_t i;
maclobdell 0:f7c60d3e7b8a 1736 size_t cn_idx = 0, cn_len = strlen( cn );
maclobdell 0:f7c60d3e7b8a 1737
maclobdell 0:f7c60d3e7b8a 1738 if( name->len < 3 || name->p[0] != '*' || name->p[1] != '.' )
maclobdell 0:f7c60d3e7b8a 1739 return( 0 );
maclobdell 0:f7c60d3e7b8a 1740
maclobdell 0:f7c60d3e7b8a 1741 for( i = 0; i < cn_len; ++i )
maclobdell 0:f7c60d3e7b8a 1742 {
maclobdell 0:f7c60d3e7b8a 1743 if( cn[i] == '.' )
maclobdell 0:f7c60d3e7b8a 1744 {
maclobdell 0:f7c60d3e7b8a 1745 cn_idx = i;
maclobdell 0:f7c60d3e7b8a 1746 break;
maclobdell 0:f7c60d3e7b8a 1747 }
maclobdell 0:f7c60d3e7b8a 1748 }
maclobdell 0:f7c60d3e7b8a 1749
maclobdell 0:f7c60d3e7b8a 1750 if( cn_idx == 0 )
maclobdell 0:f7c60d3e7b8a 1751 return( -1 );
maclobdell 0:f7c60d3e7b8a 1752
maclobdell 0:f7c60d3e7b8a 1753 if( cn_len - cn_idx == name->len - 1 &&
maclobdell 0:f7c60d3e7b8a 1754 x509_memcasecmp( name->p + 1, cn + cn_idx, name->len - 1 ) == 0 )
maclobdell 0:f7c60d3e7b8a 1755 {
maclobdell 0:f7c60d3e7b8a 1756 return( 0 );
maclobdell 0:f7c60d3e7b8a 1757 }
maclobdell 0:f7c60d3e7b8a 1758
maclobdell 0:f7c60d3e7b8a 1759 return( -1 );
maclobdell 0:f7c60d3e7b8a 1760 }
maclobdell 0:f7c60d3e7b8a 1761
maclobdell 0:f7c60d3e7b8a 1762 /*
maclobdell 0:f7c60d3e7b8a 1763 * Compare two X.509 strings, case-insensitive, and allowing for some encoding
maclobdell 0:f7c60d3e7b8a 1764 * variations (but not all).
maclobdell 0:f7c60d3e7b8a 1765 *
maclobdell 0:f7c60d3e7b8a 1766 * Return 0 if equal, -1 otherwise.
maclobdell 0:f7c60d3e7b8a 1767 */
maclobdell 0:f7c60d3e7b8a 1768 static int x509_string_cmp( const mbedtls_x509_buf *a, const mbedtls_x509_buf *b )
maclobdell 0:f7c60d3e7b8a 1769 {
maclobdell 0:f7c60d3e7b8a 1770 if( a->tag == b->tag &&
maclobdell 0:f7c60d3e7b8a 1771 a->len == b->len &&
maclobdell 0:f7c60d3e7b8a 1772 memcmp( a->p, b->p, b->len ) == 0 )
maclobdell 0:f7c60d3e7b8a 1773 {
maclobdell 0:f7c60d3e7b8a 1774 return( 0 );
maclobdell 0:f7c60d3e7b8a 1775 }
maclobdell 0:f7c60d3e7b8a 1776
maclobdell 0:f7c60d3e7b8a 1777 if( ( a->tag == MBEDTLS_ASN1_UTF8_STRING || a->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) &&
maclobdell 0:f7c60d3e7b8a 1778 ( b->tag == MBEDTLS_ASN1_UTF8_STRING || b->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) &&
maclobdell 0:f7c60d3e7b8a 1779 a->len == b->len &&
maclobdell 0:f7c60d3e7b8a 1780 x509_memcasecmp( a->p, b->p, b->len ) == 0 )
maclobdell 0:f7c60d3e7b8a 1781 {
maclobdell 0:f7c60d3e7b8a 1782 return( 0 );
maclobdell 0:f7c60d3e7b8a 1783 }
maclobdell 0:f7c60d3e7b8a 1784
maclobdell 0:f7c60d3e7b8a 1785 return( -1 );
maclobdell 0:f7c60d3e7b8a 1786 }
maclobdell 0:f7c60d3e7b8a 1787
maclobdell 0:f7c60d3e7b8a 1788 /*
maclobdell 0:f7c60d3e7b8a 1789 * Compare two X.509 Names (aka rdnSequence).
maclobdell 0:f7c60d3e7b8a 1790 *
maclobdell 0:f7c60d3e7b8a 1791 * See RFC 5280 section 7.1, though we don't implement the whole algorithm:
maclobdell 0:f7c60d3e7b8a 1792 * we sometimes return unequal when the full algorithm would return equal,
maclobdell 0:f7c60d3e7b8a 1793 * but never the other way. (In particular, we don't do Unicode normalisation
maclobdell 0:f7c60d3e7b8a 1794 * or space folding.)
maclobdell 0:f7c60d3e7b8a 1795 *
maclobdell 0:f7c60d3e7b8a 1796 * Return 0 if equal, -1 otherwise.
maclobdell 0:f7c60d3e7b8a 1797 */
maclobdell 0:f7c60d3e7b8a 1798 static int x509_name_cmp( const mbedtls_x509_name *a, const mbedtls_x509_name *b )
maclobdell 0:f7c60d3e7b8a 1799 {
maclobdell 0:f7c60d3e7b8a 1800 /* Avoid recursion, it might not be optimised by the compiler */
maclobdell 0:f7c60d3e7b8a 1801 while( a != NULL || b != NULL )
maclobdell 0:f7c60d3e7b8a 1802 {
maclobdell 0:f7c60d3e7b8a 1803 if( a == NULL || b == NULL )
maclobdell 0:f7c60d3e7b8a 1804 return( -1 );
maclobdell 0:f7c60d3e7b8a 1805
maclobdell 0:f7c60d3e7b8a 1806 /* type */
maclobdell 0:f7c60d3e7b8a 1807 if( a->oid.tag != b->oid.tag ||
maclobdell 0:f7c60d3e7b8a 1808 a->oid.len != b->oid.len ||
maclobdell 0:f7c60d3e7b8a 1809 memcmp( a->oid.p, b->oid.p, b->oid.len ) != 0 )
maclobdell 0:f7c60d3e7b8a 1810 {
maclobdell 0:f7c60d3e7b8a 1811 return( -1 );
maclobdell 0:f7c60d3e7b8a 1812 }
maclobdell 0:f7c60d3e7b8a 1813
maclobdell 0:f7c60d3e7b8a 1814 /* value */
maclobdell 0:f7c60d3e7b8a 1815 if( x509_string_cmp( &a->val, &b->val ) != 0 )
maclobdell 0:f7c60d3e7b8a 1816 return( -1 );
maclobdell 0:f7c60d3e7b8a 1817
maclobdell 0:f7c60d3e7b8a 1818 /* structure of the list of sets */
maclobdell 0:f7c60d3e7b8a 1819 if( a->next_merged != b->next_merged )
maclobdell 0:f7c60d3e7b8a 1820 return( -1 );
maclobdell 0:f7c60d3e7b8a 1821
maclobdell 0:f7c60d3e7b8a 1822 a = a->next;
maclobdell 0:f7c60d3e7b8a 1823 b = b->next;
maclobdell 0:f7c60d3e7b8a 1824 }
maclobdell 0:f7c60d3e7b8a 1825
maclobdell 0:f7c60d3e7b8a 1826 /* a == NULL == b */
maclobdell 0:f7c60d3e7b8a 1827 return( 0 );
maclobdell 0:f7c60d3e7b8a 1828 }
maclobdell 0:f7c60d3e7b8a 1829
maclobdell 0:f7c60d3e7b8a 1830 /*
maclobdell 0:f7c60d3e7b8a 1831 * Check if 'parent' is a suitable parent (signing CA) for 'child'.
maclobdell 0:f7c60d3e7b8a 1832 * Return 0 if yes, -1 if not.
maclobdell 0:f7c60d3e7b8a 1833 *
maclobdell 0:f7c60d3e7b8a 1834 * top means parent is a locally-trusted certificate
maclobdell 0:f7c60d3e7b8a 1835 * bottom means child is the end entity cert
maclobdell 0:f7c60d3e7b8a 1836 */
maclobdell 0:f7c60d3e7b8a 1837 static int x509_crt_check_parent( const mbedtls_x509_crt *child,
maclobdell 0:f7c60d3e7b8a 1838 const mbedtls_x509_crt *parent,
maclobdell 0:f7c60d3e7b8a 1839 int top, int bottom )
maclobdell 0:f7c60d3e7b8a 1840 {
maclobdell 0:f7c60d3e7b8a 1841 int need_ca_bit;
maclobdell 0:f7c60d3e7b8a 1842
maclobdell 0:f7c60d3e7b8a 1843 /* Parent must be the issuer */
maclobdell 0:f7c60d3e7b8a 1844 if( x509_name_cmp( &child->issuer, &parent->subject ) != 0 )
maclobdell 0:f7c60d3e7b8a 1845 return( -1 );
maclobdell 0:f7c60d3e7b8a 1846
maclobdell 0:f7c60d3e7b8a 1847 /* Parent must have the basicConstraints CA bit set as a general rule */
maclobdell 0:f7c60d3e7b8a 1848 need_ca_bit = 1;
maclobdell 0:f7c60d3e7b8a 1849
maclobdell 0:f7c60d3e7b8a 1850 /* Exception: v1/v2 certificates that are locally trusted. */
maclobdell 0:f7c60d3e7b8a 1851 if( top && parent->version < 3 )
maclobdell 0:f7c60d3e7b8a 1852 need_ca_bit = 0;
maclobdell 0:f7c60d3e7b8a 1853
maclobdell 0:f7c60d3e7b8a 1854 /* Exception: self-signed end-entity certs that are locally trusted. */
maclobdell 0:f7c60d3e7b8a 1855 if( top && bottom &&
maclobdell 0:f7c60d3e7b8a 1856 child->raw.len == parent->raw.len &&
maclobdell 0:f7c60d3e7b8a 1857 memcmp( child->raw.p, parent->raw.p, child->raw.len ) == 0 )
maclobdell 0:f7c60d3e7b8a 1858 {
maclobdell 0:f7c60d3e7b8a 1859 need_ca_bit = 0;
maclobdell 0:f7c60d3e7b8a 1860 }
maclobdell 0:f7c60d3e7b8a 1861
maclobdell 0:f7c60d3e7b8a 1862 if( need_ca_bit && ! parent->ca_istrue )
maclobdell 0:f7c60d3e7b8a 1863 return( -1 );
maclobdell 0:f7c60d3e7b8a 1864
maclobdell 0:f7c60d3e7b8a 1865 #if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
maclobdell 0:f7c60d3e7b8a 1866 if( need_ca_bit &&
maclobdell 0:f7c60d3e7b8a 1867 mbedtls_x509_crt_check_key_usage( parent, MBEDTLS_X509_KU_KEY_CERT_SIGN ) != 0 )
maclobdell 0:f7c60d3e7b8a 1868 {
maclobdell 0:f7c60d3e7b8a 1869 return( -1 );
maclobdell 0:f7c60d3e7b8a 1870 }
maclobdell 0:f7c60d3e7b8a 1871 #endif
maclobdell 0:f7c60d3e7b8a 1872
maclobdell 0:f7c60d3e7b8a 1873 return( 0 );
maclobdell 0:f7c60d3e7b8a 1874 }
maclobdell 0:f7c60d3e7b8a 1875
maclobdell 0:f7c60d3e7b8a 1876 static int x509_crt_verify_top(
maclobdell 0:f7c60d3e7b8a 1877 mbedtls_x509_crt *child, mbedtls_x509_crt *trust_ca,
maclobdell 0:f7c60d3e7b8a 1878 mbedtls_x509_crl *ca_crl,
maclobdell 0:f7c60d3e7b8a 1879 const mbedtls_x509_crt_profile *profile,
maclobdell 0:f7c60d3e7b8a 1880 int path_cnt, int self_cnt, uint32_t *flags,
maclobdell 0:f7c60d3e7b8a 1881 int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
maclobdell 0:f7c60d3e7b8a 1882 void *p_vrfy )
maclobdell 0:f7c60d3e7b8a 1883 {
maclobdell 0:f7c60d3e7b8a 1884 int ret;
maclobdell 0:f7c60d3e7b8a 1885 uint32_t ca_flags = 0;
maclobdell 0:f7c60d3e7b8a 1886 int check_path_cnt;
maclobdell 0:f7c60d3e7b8a 1887 unsigned char hash[MBEDTLS_MD_MAX_SIZE];
maclobdell 0:f7c60d3e7b8a 1888 const mbedtls_md_info_t *md_info;
maclobdell 0:f7c60d3e7b8a 1889
maclobdell 0:f7c60d3e7b8a 1890 if( mbedtls_x509_time_is_past( &child->valid_to ) )
maclobdell 0:f7c60d3e7b8a 1891 *flags |= MBEDTLS_X509_BADCERT_EXPIRED;
maclobdell 0:f7c60d3e7b8a 1892
maclobdell 0:f7c60d3e7b8a 1893 if( mbedtls_x509_time_is_future( &child->valid_from ) )
maclobdell 0:f7c60d3e7b8a 1894 *flags |= MBEDTLS_X509_BADCERT_FUTURE;
maclobdell 0:f7c60d3e7b8a 1895
maclobdell 0:f7c60d3e7b8a 1896 if( x509_profile_check_md_alg( profile, child->sig_md ) != 0 )
maclobdell 0:f7c60d3e7b8a 1897 *flags |= MBEDTLS_X509_BADCERT_BAD_MD;
maclobdell 0:f7c60d3e7b8a 1898
maclobdell 0:f7c60d3e7b8a 1899 if( x509_profile_check_pk_alg( profile, child->sig_pk ) != 0 )
maclobdell 0:f7c60d3e7b8a 1900 *flags |= MBEDTLS_X509_BADCERT_BAD_PK;
maclobdell 0:f7c60d3e7b8a 1901
maclobdell 0:f7c60d3e7b8a 1902 /*
maclobdell 0:f7c60d3e7b8a 1903 * Child is the top of the chain. Check against the trust_ca list.
maclobdell 0:f7c60d3e7b8a 1904 */
maclobdell 0:f7c60d3e7b8a 1905 *flags |= MBEDTLS_X509_BADCERT_NOT_TRUSTED;
maclobdell 0:f7c60d3e7b8a 1906
maclobdell 0:f7c60d3e7b8a 1907 md_info = mbedtls_md_info_from_type( child->sig_md );
maclobdell 0:f7c60d3e7b8a 1908 if( md_info == NULL )
maclobdell 0:f7c60d3e7b8a 1909 {
maclobdell 0:f7c60d3e7b8a 1910 /*
maclobdell 0:f7c60d3e7b8a 1911 * Cannot check 'unknown', no need to try any CA
maclobdell 0:f7c60d3e7b8a 1912 */
maclobdell 0:f7c60d3e7b8a 1913 trust_ca = NULL;
maclobdell 0:f7c60d3e7b8a 1914 }
maclobdell 0:f7c60d3e7b8a 1915 else
maclobdell 0:f7c60d3e7b8a 1916 mbedtls_md( md_info, child->tbs.p, child->tbs.len, hash );
maclobdell 0:f7c60d3e7b8a 1917
maclobdell 0:f7c60d3e7b8a 1918 for( /* trust_ca */ ; trust_ca != NULL; trust_ca = trust_ca->next )
maclobdell 0:f7c60d3e7b8a 1919 {
maclobdell 0:f7c60d3e7b8a 1920 if( x509_crt_check_parent( child, trust_ca, 1, path_cnt == 0 ) != 0 )
maclobdell 0:f7c60d3e7b8a 1921 continue;
maclobdell 0:f7c60d3e7b8a 1922
maclobdell 0:f7c60d3e7b8a 1923 check_path_cnt = path_cnt + 1;
maclobdell 0:f7c60d3e7b8a 1924
maclobdell 0:f7c60d3e7b8a 1925 /*
maclobdell 0:f7c60d3e7b8a 1926 * Reduce check_path_cnt to check against if top of the chain is
maclobdell 0:f7c60d3e7b8a 1927 * the same as the trusted CA
maclobdell 0:f7c60d3e7b8a 1928 */
maclobdell 0:f7c60d3e7b8a 1929 if( child->subject_raw.len == trust_ca->subject_raw.len &&
maclobdell 0:f7c60d3e7b8a 1930 memcmp( child->subject_raw.p, trust_ca->subject_raw.p,
maclobdell 0:f7c60d3e7b8a 1931 child->issuer_raw.len ) == 0 )
maclobdell 0:f7c60d3e7b8a 1932 {
maclobdell 0:f7c60d3e7b8a 1933 check_path_cnt--;
maclobdell 0:f7c60d3e7b8a 1934 }
maclobdell 0:f7c60d3e7b8a 1935
maclobdell 0:f7c60d3e7b8a 1936 /* Self signed certificates do not count towards the limit */
maclobdell 0:f7c60d3e7b8a 1937 if( trust_ca->max_pathlen > 0 &&
maclobdell 0:f7c60d3e7b8a 1938 trust_ca->max_pathlen < check_path_cnt - self_cnt )
maclobdell 0:f7c60d3e7b8a 1939 {
maclobdell 0:f7c60d3e7b8a 1940 continue;
maclobdell 0:f7c60d3e7b8a 1941 }
maclobdell 0:f7c60d3e7b8a 1942
maclobdell 0:f7c60d3e7b8a 1943 if( mbedtls_pk_verify_ext( child->sig_pk, child->sig_opts, &trust_ca->pk,
maclobdell 0:f7c60d3e7b8a 1944 child->sig_md, hash, mbedtls_md_get_size( md_info ),
maclobdell 0:f7c60d3e7b8a 1945 child->sig.p, child->sig.len ) != 0 )
maclobdell 0:f7c60d3e7b8a 1946 {
maclobdell 0:f7c60d3e7b8a 1947 continue;
maclobdell 0:f7c60d3e7b8a 1948 }
maclobdell 0:f7c60d3e7b8a 1949
maclobdell 0:f7c60d3e7b8a 1950 /*
maclobdell 0:f7c60d3e7b8a 1951 * Top of chain is signed by a trusted CA
maclobdell 0:f7c60d3e7b8a 1952 */
maclobdell 0:f7c60d3e7b8a 1953 *flags &= ~MBEDTLS_X509_BADCERT_NOT_TRUSTED;
maclobdell 0:f7c60d3e7b8a 1954
maclobdell 0:f7c60d3e7b8a 1955 if( x509_profile_check_key( profile, child->sig_pk, &trust_ca->pk ) != 0 )
maclobdell 0:f7c60d3e7b8a 1956 *flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
maclobdell 0:f7c60d3e7b8a 1957
maclobdell 0:f7c60d3e7b8a 1958 break;
maclobdell 0:f7c60d3e7b8a 1959 }
maclobdell 0:f7c60d3e7b8a 1960
maclobdell 0:f7c60d3e7b8a 1961 /*
maclobdell 0:f7c60d3e7b8a 1962 * If top of chain is not the same as the trusted CA send a verify request
maclobdell 0:f7c60d3e7b8a 1963 * to the callback for any issues with validity and CRL presence for the
maclobdell 0:f7c60d3e7b8a 1964 * trusted CA certificate.
maclobdell 0:f7c60d3e7b8a 1965 */
maclobdell 0:f7c60d3e7b8a 1966 if( trust_ca != NULL &&
maclobdell 0:f7c60d3e7b8a 1967 ( child->subject_raw.len != trust_ca->subject_raw.len ||
maclobdell 0:f7c60d3e7b8a 1968 memcmp( child->subject_raw.p, trust_ca->subject_raw.p,
maclobdell 0:f7c60d3e7b8a 1969 child->issuer_raw.len ) != 0 ) )
maclobdell 0:f7c60d3e7b8a 1970 {
maclobdell 0:f7c60d3e7b8a 1971 #if defined(MBEDTLS_X509_CRL_PARSE_C)
maclobdell 0:f7c60d3e7b8a 1972 /* Check trusted CA's CRL for the chain's top crt */
maclobdell 0:f7c60d3e7b8a 1973 *flags |= x509_crt_verifycrl( child, trust_ca, ca_crl, profile );
maclobdell 0:f7c60d3e7b8a 1974 #else
maclobdell 0:f7c60d3e7b8a 1975 ((void) ca_crl);
maclobdell 0:f7c60d3e7b8a 1976 #endif
maclobdell 0:f7c60d3e7b8a 1977
maclobdell 0:f7c60d3e7b8a 1978 if( mbedtls_x509_time_is_past( &trust_ca->valid_to ) )
maclobdell 0:f7c60d3e7b8a 1979 ca_flags |= MBEDTLS_X509_BADCERT_EXPIRED;
maclobdell 0:f7c60d3e7b8a 1980
maclobdell 0:f7c60d3e7b8a 1981 if( mbedtls_x509_time_is_future( &trust_ca->valid_from ) )
maclobdell 0:f7c60d3e7b8a 1982 ca_flags |= MBEDTLS_X509_BADCERT_FUTURE;
maclobdell 0:f7c60d3e7b8a 1983
maclobdell 0:f7c60d3e7b8a 1984 if( NULL != f_vrfy )
maclobdell 0:f7c60d3e7b8a 1985 {
maclobdell 0:f7c60d3e7b8a 1986 if( ( ret = f_vrfy( p_vrfy, trust_ca, path_cnt + 1,
maclobdell 0:f7c60d3e7b8a 1987 &ca_flags ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 1988 {
maclobdell 0:f7c60d3e7b8a 1989 return( ret );
maclobdell 0:f7c60d3e7b8a 1990 }
maclobdell 0:f7c60d3e7b8a 1991 }
maclobdell 0:f7c60d3e7b8a 1992 }
maclobdell 0:f7c60d3e7b8a 1993
maclobdell 0:f7c60d3e7b8a 1994 /* Call callback on top cert */
maclobdell 0:f7c60d3e7b8a 1995 if( NULL != f_vrfy )
maclobdell 0:f7c60d3e7b8a 1996 {
maclobdell 0:f7c60d3e7b8a 1997 if( ( ret = f_vrfy( p_vrfy, child, path_cnt, flags ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 1998 return( ret );
maclobdell 0:f7c60d3e7b8a 1999 }
maclobdell 0:f7c60d3e7b8a 2000
maclobdell 0:f7c60d3e7b8a 2001 *flags |= ca_flags;
maclobdell 0:f7c60d3e7b8a 2002
maclobdell 0:f7c60d3e7b8a 2003 return( 0 );
maclobdell 0:f7c60d3e7b8a 2004 }
maclobdell 0:f7c60d3e7b8a 2005
maclobdell 0:f7c60d3e7b8a 2006 static int x509_crt_verify_child(
maclobdell 0:f7c60d3e7b8a 2007 mbedtls_x509_crt *child, mbedtls_x509_crt *parent,
maclobdell 0:f7c60d3e7b8a 2008 mbedtls_x509_crt *trust_ca, mbedtls_x509_crl *ca_crl,
maclobdell 0:f7c60d3e7b8a 2009 const mbedtls_x509_crt_profile *profile,
maclobdell 0:f7c60d3e7b8a 2010 int path_cnt, int self_cnt, uint32_t *flags,
maclobdell 0:f7c60d3e7b8a 2011 int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
maclobdell 0:f7c60d3e7b8a 2012 void *p_vrfy )
maclobdell 0:f7c60d3e7b8a 2013 {
maclobdell 0:f7c60d3e7b8a 2014 int ret;
maclobdell 0:f7c60d3e7b8a 2015 uint32_t parent_flags = 0;
maclobdell 0:f7c60d3e7b8a 2016 unsigned char hash[MBEDTLS_MD_MAX_SIZE];
maclobdell 0:f7c60d3e7b8a 2017 mbedtls_x509_crt *grandparent;
maclobdell 0:f7c60d3e7b8a 2018 const mbedtls_md_info_t *md_info;
maclobdell 0:f7c60d3e7b8a 2019
maclobdell 0:f7c60d3e7b8a 2020 /* Counting intermediate self signed certificates */
maclobdell 0:f7c60d3e7b8a 2021 if( ( path_cnt != 0 ) && x509_name_cmp( &child->issuer, &child->subject ) == 0 )
maclobdell 0:f7c60d3e7b8a 2022 self_cnt++;
maclobdell 0:f7c60d3e7b8a 2023
maclobdell 0:f7c60d3e7b8a 2024 /* path_cnt is 0 for the first intermediate CA */
maclobdell 0:f7c60d3e7b8a 2025 if( 1 + path_cnt > MBEDTLS_X509_MAX_INTERMEDIATE_CA )
maclobdell 0:f7c60d3e7b8a 2026 {
maclobdell 0:f7c60d3e7b8a 2027 *flags |= MBEDTLS_X509_BADCERT_NOT_TRUSTED;
maclobdell 0:f7c60d3e7b8a 2028 return( MBEDTLS_ERR_X509_CERT_VERIFY_FAILED );
maclobdell 0:f7c60d3e7b8a 2029 }
maclobdell 0:f7c60d3e7b8a 2030
maclobdell 0:f7c60d3e7b8a 2031 if( mbedtls_x509_time_is_past( &child->valid_to ) )
maclobdell 0:f7c60d3e7b8a 2032 *flags |= MBEDTLS_X509_BADCERT_EXPIRED;
maclobdell 0:f7c60d3e7b8a 2033
maclobdell 0:f7c60d3e7b8a 2034 if( mbedtls_x509_time_is_future( &child->valid_from ) )
maclobdell 0:f7c60d3e7b8a 2035 *flags |= MBEDTLS_X509_BADCERT_FUTURE;
maclobdell 0:f7c60d3e7b8a 2036
maclobdell 0:f7c60d3e7b8a 2037 if( x509_profile_check_md_alg( profile, child->sig_md ) != 0 )
maclobdell 0:f7c60d3e7b8a 2038 *flags |= MBEDTLS_X509_BADCERT_BAD_MD;
maclobdell 0:f7c60d3e7b8a 2039
maclobdell 0:f7c60d3e7b8a 2040 if( x509_profile_check_pk_alg( profile, child->sig_pk ) != 0 )
maclobdell 0:f7c60d3e7b8a 2041 *flags |= MBEDTLS_X509_BADCERT_BAD_PK;
maclobdell 0:f7c60d3e7b8a 2042
maclobdell 0:f7c60d3e7b8a 2043 md_info = mbedtls_md_info_from_type( child->sig_md );
maclobdell 0:f7c60d3e7b8a 2044 if( md_info == NULL )
maclobdell 0:f7c60d3e7b8a 2045 {
maclobdell 0:f7c60d3e7b8a 2046 /*
maclobdell 0:f7c60d3e7b8a 2047 * Cannot check 'unknown' hash
maclobdell 0:f7c60d3e7b8a 2048 */
maclobdell 0:f7c60d3e7b8a 2049 *flags |= MBEDTLS_X509_BADCERT_NOT_TRUSTED;
maclobdell 0:f7c60d3e7b8a 2050 }
maclobdell 0:f7c60d3e7b8a 2051 else
maclobdell 0:f7c60d3e7b8a 2052 {
maclobdell 0:f7c60d3e7b8a 2053 mbedtls_md( md_info, child->tbs.p, child->tbs.len, hash );
maclobdell 0:f7c60d3e7b8a 2054
maclobdell 0:f7c60d3e7b8a 2055 if( x509_profile_check_key( profile, child->sig_pk, &parent->pk ) != 0 )
maclobdell 0:f7c60d3e7b8a 2056 *flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
maclobdell 0:f7c60d3e7b8a 2057
maclobdell 0:f7c60d3e7b8a 2058 if( mbedtls_pk_verify_ext( child->sig_pk, child->sig_opts, &parent->pk,
maclobdell 0:f7c60d3e7b8a 2059 child->sig_md, hash, mbedtls_md_get_size( md_info ),
maclobdell 0:f7c60d3e7b8a 2060 child->sig.p, child->sig.len ) != 0 )
maclobdell 0:f7c60d3e7b8a 2061 {
maclobdell 0:f7c60d3e7b8a 2062 *flags |= MBEDTLS_X509_BADCERT_NOT_TRUSTED;
maclobdell 0:f7c60d3e7b8a 2063 }
maclobdell 0:f7c60d3e7b8a 2064 }
maclobdell 0:f7c60d3e7b8a 2065
maclobdell 0:f7c60d3e7b8a 2066 #if defined(MBEDTLS_X509_CRL_PARSE_C)
maclobdell 0:f7c60d3e7b8a 2067 /* Check trusted CA's CRL for the given crt */
maclobdell 0:f7c60d3e7b8a 2068 *flags |= x509_crt_verifycrl(child, parent, ca_crl, profile );
maclobdell 0:f7c60d3e7b8a 2069 #endif
maclobdell 0:f7c60d3e7b8a 2070
maclobdell 0:f7c60d3e7b8a 2071 /* Look for a grandparent in trusted CAs */
maclobdell 0:f7c60d3e7b8a 2072 for( grandparent = trust_ca;
maclobdell 0:f7c60d3e7b8a 2073 grandparent != NULL;
maclobdell 0:f7c60d3e7b8a 2074 grandparent = grandparent->next )
maclobdell 0:f7c60d3e7b8a 2075 {
maclobdell 0:f7c60d3e7b8a 2076 if( x509_crt_check_parent( parent, grandparent,
maclobdell 0:f7c60d3e7b8a 2077 0, path_cnt == 0 ) == 0 )
maclobdell 0:f7c60d3e7b8a 2078 break;
maclobdell 0:f7c60d3e7b8a 2079 }
maclobdell 0:f7c60d3e7b8a 2080
maclobdell 0:f7c60d3e7b8a 2081 if( grandparent != NULL )
maclobdell 0:f7c60d3e7b8a 2082 {
maclobdell 0:f7c60d3e7b8a 2083 ret = x509_crt_verify_top( parent, grandparent, ca_crl, profile,
maclobdell 0:f7c60d3e7b8a 2084 path_cnt + 1, self_cnt, &parent_flags, f_vrfy, p_vrfy );
maclobdell 0:f7c60d3e7b8a 2085 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 2086 return( ret );
maclobdell 0:f7c60d3e7b8a 2087 }
maclobdell 0:f7c60d3e7b8a 2088 else
maclobdell 0:f7c60d3e7b8a 2089 {
maclobdell 0:f7c60d3e7b8a 2090 /* Look for a grandparent upwards the chain */
maclobdell 0:f7c60d3e7b8a 2091 for( grandparent = parent->next;
maclobdell 0:f7c60d3e7b8a 2092 grandparent != NULL;
maclobdell 0:f7c60d3e7b8a 2093 grandparent = grandparent->next )
maclobdell 0:f7c60d3e7b8a 2094 {
maclobdell 0:f7c60d3e7b8a 2095 /* +2 because the current step is not yet accounted for
maclobdell 0:f7c60d3e7b8a 2096 * and because max_pathlen is one higher than it should be.
maclobdell 0:f7c60d3e7b8a 2097 * Also self signed certificates do not count to the limit. */
maclobdell 0:f7c60d3e7b8a 2098 if( grandparent->max_pathlen > 0 &&
maclobdell 0:f7c60d3e7b8a 2099 grandparent->max_pathlen < 2 + path_cnt - self_cnt )
maclobdell 0:f7c60d3e7b8a 2100 {
maclobdell 0:f7c60d3e7b8a 2101 continue;
maclobdell 0:f7c60d3e7b8a 2102 }
maclobdell 0:f7c60d3e7b8a 2103
maclobdell 0:f7c60d3e7b8a 2104 if( x509_crt_check_parent( parent, grandparent,
maclobdell 0:f7c60d3e7b8a 2105 0, path_cnt == 0 ) == 0 )
maclobdell 0:f7c60d3e7b8a 2106 break;
maclobdell 0:f7c60d3e7b8a 2107 }
maclobdell 0:f7c60d3e7b8a 2108
maclobdell 0:f7c60d3e7b8a 2109 /* Is our parent part of the chain or at the top? */
maclobdell 0:f7c60d3e7b8a 2110 if( grandparent != NULL )
maclobdell 0:f7c60d3e7b8a 2111 {
maclobdell 0:f7c60d3e7b8a 2112 ret = x509_crt_verify_child( parent, grandparent, trust_ca, ca_crl,
maclobdell 0:f7c60d3e7b8a 2113 profile, path_cnt + 1, self_cnt, &parent_flags,
maclobdell 0:f7c60d3e7b8a 2114 f_vrfy, p_vrfy );
maclobdell 0:f7c60d3e7b8a 2115 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 2116 return( ret );
maclobdell 0:f7c60d3e7b8a 2117 }
maclobdell 0:f7c60d3e7b8a 2118 else
maclobdell 0:f7c60d3e7b8a 2119 {
maclobdell 0:f7c60d3e7b8a 2120 ret = x509_crt_verify_top( parent, trust_ca, ca_crl, profile,
maclobdell 0:f7c60d3e7b8a 2121 path_cnt + 1, self_cnt, &parent_flags,
maclobdell 0:f7c60d3e7b8a 2122 f_vrfy, p_vrfy );
maclobdell 0:f7c60d3e7b8a 2123 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 2124 return( ret );
maclobdell 0:f7c60d3e7b8a 2125 }
maclobdell 0:f7c60d3e7b8a 2126 }
maclobdell 0:f7c60d3e7b8a 2127
maclobdell 0:f7c60d3e7b8a 2128 /* child is verified to be a child of the parent, call verify callback */
maclobdell 0:f7c60d3e7b8a 2129 if( NULL != f_vrfy )
maclobdell 0:f7c60d3e7b8a 2130 if( ( ret = f_vrfy( p_vrfy, child, path_cnt, flags ) ) != 0 )
maclobdell 0:f7c60d3e7b8a 2131 return( ret );
maclobdell 0:f7c60d3e7b8a 2132
maclobdell 0:f7c60d3e7b8a 2133 *flags |= parent_flags;
maclobdell 0:f7c60d3e7b8a 2134
maclobdell 0:f7c60d3e7b8a 2135 return( 0 );
maclobdell 0:f7c60d3e7b8a 2136 }
maclobdell 0:f7c60d3e7b8a 2137
maclobdell 0:f7c60d3e7b8a 2138 /*
maclobdell 0:f7c60d3e7b8a 2139 * Verify the certificate validity
maclobdell 0:f7c60d3e7b8a 2140 */
maclobdell 0:f7c60d3e7b8a 2141 int mbedtls_x509_crt_verify( mbedtls_x509_crt *crt,
maclobdell 0:f7c60d3e7b8a 2142 mbedtls_x509_crt *trust_ca,
maclobdell 0:f7c60d3e7b8a 2143 mbedtls_x509_crl *ca_crl,
maclobdell 0:f7c60d3e7b8a 2144 const char *cn, uint32_t *flags,
maclobdell 0:f7c60d3e7b8a 2145 int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
maclobdell 0:f7c60d3e7b8a 2146 void *p_vrfy )
maclobdell 0:f7c60d3e7b8a 2147 {
maclobdell 0:f7c60d3e7b8a 2148 return( mbedtls_x509_crt_verify_with_profile( crt, trust_ca, ca_crl,
maclobdell 0:f7c60d3e7b8a 2149 &mbedtls_x509_crt_profile_default, cn, flags, f_vrfy, p_vrfy ) );
maclobdell 0:f7c60d3e7b8a 2150 }
maclobdell 0:f7c60d3e7b8a 2151
maclobdell 0:f7c60d3e7b8a 2152
maclobdell 0:f7c60d3e7b8a 2153 /*
maclobdell 0:f7c60d3e7b8a 2154 * Verify the certificate validity, with profile
maclobdell 0:f7c60d3e7b8a 2155 */
maclobdell 0:f7c60d3e7b8a 2156 int mbedtls_x509_crt_verify_with_profile( mbedtls_x509_crt *crt,
maclobdell 0:f7c60d3e7b8a 2157 mbedtls_x509_crt *trust_ca,
maclobdell 0:f7c60d3e7b8a 2158 mbedtls_x509_crl *ca_crl,
maclobdell 0:f7c60d3e7b8a 2159 const mbedtls_x509_crt_profile *profile,
maclobdell 0:f7c60d3e7b8a 2160 const char *cn, uint32_t *flags,
maclobdell 0:f7c60d3e7b8a 2161 int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
maclobdell 0:f7c60d3e7b8a 2162 void *p_vrfy )
maclobdell 0:f7c60d3e7b8a 2163 {
maclobdell 0:f7c60d3e7b8a 2164 size_t cn_len;
maclobdell 0:f7c60d3e7b8a 2165 int ret;
maclobdell 0:f7c60d3e7b8a 2166 int pathlen = 0, selfsigned = 0;
maclobdell 0:f7c60d3e7b8a 2167 mbedtls_x509_crt *parent;
maclobdell 0:f7c60d3e7b8a 2168 mbedtls_x509_name *name;
maclobdell 0:f7c60d3e7b8a 2169 mbedtls_x509_sequence *cur = NULL;
maclobdell 0:f7c60d3e7b8a 2170 mbedtls_pk_type_t pk_type;
maclobdell 0:f7c60d3e7b8a 2171
maclobdell 0:f7c60d3e7b8a 2172 if( profile == NULL )
maclobdell 0:f7c60d3e7b8a 2173 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
maclobdell 0:f7c60d3e7b8a 2174
maclobdell 0:f7c60d3e7b8a 2175 *flags = 0;
maclobdell 0:f7c60d3e7b8a 2176
maclobdell 0:f7c60d3e7b8a 2177 if( cn != NULL )
maclobdell 0:f7c60d3e7b8a 2178 {
maclobdell 0:f7c60d3e7b8a 2179 name = &crt->subject;
maclobdell 0:f7c60d3e7b8a 2180 cn_len = strlen( cn );
maclobdell 0:f7c60d3e7b8a 2181
maclobdell 0:f7c60d3e7b8a 2182 if( crt->ext_types & MBEDTLS_X509_EXT_SUBJECT_ALT_NAME )
maclobdell 0:f7c60d3e7b8a 2183 {
maclobdell 0:f7c60d3e7b8a 2184 cur = &crt->subject_alt_names;
maclobdell 0:f7c60d3e7b8a 2185
maclobdell 0:f7c60d3e7b8a 2186 while( cur != NULL )
maclobdell 0:f7c60d3e7b8a 2187 {
maclobdell 0:f7c60d3e7b8a 2188 if( cur->buf.len == cn_len &&
maclobdell 0:f7c60d3e7b8a 2189 x509_memcasecmp( cn, cur->buf.p, cn_len ) == 0 )
maclobdell 0:f7c60d3e7b8a 2190 break;
maclobdell 0:f7c60d3e7b8a 2191
maclobdell 0:f7c60d3e7b8a 2192 if( cur->buf.len > 2 &&
maclobdell 0:f7c60d3e7b8a 2193 memcmp( cur->buf.p, "*.", 2 ) == 0 &&
maclobdell 0:f7c60d3e7b8a 2194 x509_check_wildcard( cn, &cur->buf ) == 0 )
maclobdell 0:f7c60d3e7b8a 2195 {
maclobdell 0:f7c60d3e7b8a 2196 break;
maclobdell 0:f7c60d3e7b8a 2197 }
maclobdell 0:f7c60d3e7b8a 2198
maclobdell 0:f7c60d3e7b8a 2199 cur = cur->next;
maclobdell 0:f7c60d3e7b8a 2200 }
maclobdell 0:f7c60d3e7b8a 2201
maclobdell 0:f7c60d3e7b8a 2202 if( cur == NULL )
maclobdell 0:f7c60d3e7b8a 2203 *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH;
maclobdell 0:f7c60d3e7b8a 2204 }
maclobdell 0:f7c60d3e7b8a 2205 else
maclobdell 0:f7c60d3e7b8a 2206 {
maclobdell 0:f7c60d3e7b8a 2207 while( name != NULL )
maclobdell 0:f7c60d3e7b8a 2208 {
maclobdell 0:f7c60d3e7b8a 2209 if( MBEDTLS_OID_CMP( MBEDTLS_OID_AT_CN, &name->oid ) == 0 )
maclobdell 0:f7c60d3e7b8a 2210 {
maclobdell 0:f7c60d3e7b8a 2211 if( name->val.len == cn_len &&
maclobdell 0:f7c60d3e7b8a 2212 x509_memcasecmp( name->val.p, cn, cn_len ) == 0 )
maclobdell 0:f7c60d3e7b8a 2213 break;
maclobdell 0:f7c60d3e7b8a 2214
maclobdell 0:f7c60d3e7b8a 2215 if( name->val.len > 2 &&
maclobdell 0:f7c60d3e7b8a 2216 memcmp( name->val.p, "*.", 2 ) == 0 &&
maclobdell 0:f7c60d3e7b8a 2217 x509_check_wildcard( cn, &name->val ) == 0 )
maclobdell 0:f7c60d3e7b8a 2218 break;
maclobdell 0:f7c60d3e7b8a 2219 }
maclobdell 0:f7c60d3e7b8a 2220
maclobdell 0:f7c60d3e7b8a 2221 name = name->next;
maclobdell 0:f7c60d3e7b8a 2222 }
maclobdell 0:f7c60d3e7b8a 2223
maclobdell 0:f7c60d3e7b8a 2224 if( name == NULL )
maclobdell 0:f7c60d3e7b8a 2225 *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH;
maclobdell 0:f7c60d3e7b8a 2226 }
maclobdell 0:f7c60d3e7b8a 2227 }
maclobdell 0:f7c60d3e7b8a 2228
maclobdell 0:f7c60d3e7b8a 2229 /* Check the type and size of the key */
maclobdell 0:f7c60d3e7b8a 2230 pk_type = mbedtls_pk_get_type( &crt->pk );
maclobdell 0:f7c60d3e7b8a 2231
maclobdell 0:f7c60d3e7b8a 2232 if( x509_profile_check_pk_alg( profile, pk_type ) != 0 )
maclobdell 0:f7c60d3e7b8a 2233 *flags |= MBEDTLS_X509_BADCERT_BAD_PK;
maclobdell 0:f7c60d3e7b8a 2234
maclobdell 0:f7c60d3e7b8a 2235 if( x509_profile_check_key( profile, pk_type, &crt->pk ) != 0 )
maclobdell 0:f7c60d3e7b8a 2236 *flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
maclobdell 0:f7c60d3e7b8a 2237
maclobdell 0:f7c60d3e7b8a 2238 /* Look for a parent in trusted CAs */
maclobdell 0:f7c60d3e7b8a 2239 for( parent = trust_ca; parent != NULL; parent = parent->next )
maclobdell 0:f7c60d3e7b8a 2240 {
maclobdell 0:f7c60d3e7b8a 2241 if( x509_crt_check_parent( crt, parent, 0, pathlen == 0 ) == 0 )
maclobdell 0:f7c60d3e7b8a 2242 break;
maclobdell 0:f7c60d3e7b8a 2243 }
maclobdell 0:f7c60d3e7b8a 2244
maclobdell 0:f7c60d3e7b8a 2245 if( parent != NULL )
maclobdell 0:f7c60d3e7b8a 2246 {
maclobdell 0:f7c60d3e7b8a 2247 ret = x509_crt_verify_top( crt, parent, ca_crl, profile,
maclobdell 0:f7c60d3e7b8a 2248 pathlen, selfsigned, flags, f_vrfy, p_vrfy );
maclobdell 0:f7c60d3e7b8a 2249 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 2250 return( ret );
maclobdell 0:f7c60d3e7b8a 2251 }
maclobdell 0:f7c60d3e7b8a 2252 else
maclobdell 0:f7c60d3e7b8a 2253 {
maclobdell 0:f7c60d3e7b8a 2254 /* Look for a parent upwards the chain */
maclobdell 0:f7c60d3e7b8a 2255 for( parent = crt->next; parent != NULL; parent = parent->next )
maclobdell 0:f7c60d3e7b8a 2256 {
maclobdell 0:f7c60d3e7b8a 2257 /* +2 because the current step is not yet accounted for
maclobdell 0:f7c60d3e7b8a 2258 * and because max_pathlen is one higher than it should be */
maclobdell 0:f7c60d3e7b8a 2259 if( parent->max_pathlen > 0 &&
maclobdell 0:f7c60d3e7b8a 2260 parent->max_pathlen < 2 + pathlen )
maclobdell 0:f7c60d3e7b8a 2261 {
maclobdell 0:f7c60d3e7b8a 2262 continue;
maclobdell 0:f7c60d3e7b8a 2263 }
maclobdell 0:f7c60d3e7b8a 2264
maclobdell 0:f7c60d3e7b8a 2265 if( x509_crt_check_parent( crt, parent, 0, pathlen == 0 ) == 0 )
maclobdell 0:f7c60d3e7b8a 2266 break;
maclobdell 0:f7c60d3e7b8a 2267 }
maclobdell 0:f7c60d3e7b8a 2268
maclobdell 0:f7c60d3e7b8a 2269 /* Are we part of the chain or at the top? */
maclobdell 0:f7c60d3e7b8a 2270 if( parent != NULL )
maclobdell 0:f7c60d3e7b8a 2271 {
maclobdell 0:f7c60d3e7b8a 2272 ret = x509_crt_verify_child( crt, parent, trust_ca, ca_crl, profile,
maclobdell 0:f7c60d3e7b8a 2273 pathlen, selfsigned, flags, f_vrfy, p_vrfy );
maclobdell 0:f7c60d3e7b8a 2274 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 2275 return( ret );
maclobdell 0:f7c60d3e7b8a 2276 }
maclobdell 0:f7c60d3e7b8a 2277 else
maclobdell 0:f7c60d3e7b8a 2278 {
maclobdell 0:f7c60d3e7b8a 2279 ret = x509_crt_verify_top( crt, trust_ca, ca_crl, profile,
maclobdell 0:f7c60d3e7b8a 2280 pathlen, selfsigned, flags, f_vrfy, p_vrfy );
maclobdell 0:f7c60d3e7b8a 2281 if( ret != 0 )
maclobdell 0:f7c60d3e7b8a 2282 return( ret );
maclobdell 0:f7c60d3e7b8a 2283 }
maclobdell 0:f7c60d3e7b8a 2284 }
maclobdell 0:f7c60d3e7b8a 2285
maclobdell 0:f7c60d3e7b8a 2286 if( *flags != 0 )
maclobdell 0:f7c60d3e7b8a 2287 return( MBEDTLS_ERR_X509_CERT_VERIFY_FAILED );
maclobdell 0:f7c60d3e7b8a 2288
maclobdell 0:f7c60d3e7b8a 2289 return( 0 );
maclobdell 0:f7c60d3e7b8a 2290 }
maclobdell 0:f7c60d3e7b8a 2291
maclobdell 0:f7c60d3e7b8a 2292 /*
maclobdell 0:f7c60d3e7b8a 2293 * Initialize a certificate chain
maclobdell 0:f7c60d3e7b8a 2294 */
maclobdell 0:f7c60d3e7b8a 2295 void mbedtls_x509_crt_init( mbedtls_x509_crt *crt )
maclobdell 0:f7c60d3e7b8a 2296 {
maclobdell 0:f7c60d3e7b8a 2297 memset( crt, 0, sizeof(mbedtls_x509_crt) );
maclobdell 0:f7c60d3e7b8a 2298 }
maclobdell 0:f7c60d3e7b8a 2299
maclobdell 0:f7c60d3e7b8a 2300 /*
maclobdell 0:f7c60d3e7b8a 2301 * Unallocate all certificate data
maclobdell 0:f7c60d3e7b8a 2302 */
maclobdell 0:f7c60d3e7b8a 2303 void mbedtls_x509_crt_free( mbedtls_x509_crt *crt )
maclobdell 0:f7c60d3e7b8a 2304 {
maclobdell 0:f7c60d3e7b8a 2305 mbedtls_x509_crt *cert_cur = crt;
maclobdell 0:f7c60d3e7b8a 2306 mbedtls_x509_crt *cert_prv;
maclobdell 0:f7c60d3e7b8a 2307 mbedtls_x509_name *name_cur;
maclobdell 0:f7c60d3e7b8a 2308 mbedtls_x509_name *name_prv;
maclobdell 0:f7c60d3e7b8a 2309 mbedtls_x509_sequence *seq_cur;
maclobdell 0:f7c60d3e7b8a 2310 mbedtls_x509_sequence *seq_prv;
maclobdell 0:f7c60d3e7b8a 2311
maclobdell 0:f7c60d3e7b8a 2312 if( crt == NULL )
maclobdell 0:f7c60d3e7b8a 2313 return;
maclobdell 0:f7c60d3e7b8a 2314
maclobdell 0:f7c60d3e7b8a 2315 do
maclobdell 0:f7c60d3e7b8a 2316 {
maclobdell 0:f7c60d3e7b8a 2317 mbedtls_pk_free( &cert_cur->pk );
maclobdell 0:f7c60d3e7b8a 2318
maclobdell 0:f7c60d3e7b8a 2319 #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
maclobdell 0:f7c60d3e7b8a 2320 mbedtls_free( cert_cur->sig_opts );
maclobdell 0:f7c60d3e7b8a 2321 #endif
maclobdell 0:f7c60d3e7b8a 2322
maclobdell 0:f7c60d3e7b8a 2323 name_cur = cert_cur->issuer.next;
maclobdell 0:f7c60d3e7b8a 2324 while( name_cur != NULL )
maclobdell 0:f7c60d3e7b8a 2325 {
maclobdell 0:f7c60d3e7b8a 2326 name_prv = name_cur;
maclobdell 0:f7c60d3e7b8a 2327 name_cur = name_cur->next;
maclobdell 0:f7c60d3e7b8a 2328 mbedtls_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
maclobdell 0:f7c60d3e7b8a 2329 mbedtls_free( name_prv );
maclobdell 0:f7c60d3e7b8a 2330 }
maclobdell 0:f7c60d3e7b8a 2331
maclobdell 0:f7c60d3e7b8a 2332 name_cur = cert_cur->subject.next;
maclobdell 0:f7c60d3e7b8a 2333 while( name_cur != NULL )
maclobdell 0:f7c60d3e7b8a 2334 {
maclobdell 0:f7c60d3e7b8a 2335 name_prv = name_cur;
maclobdell 0:f7c60d3e7b8a 2336 name_cur = name_cur->next;
maclobdell 0:f7c60d3e7b8a 2337 mbedtls_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
maclobdell 0:f7c60d3e7b8a 2338 mbedtls_free( name_prv );
maclobdell 0:f7c60d3e7b8a 2339 }
maclobdell 0:f7c60d3e7b8a 2340
maclobdell 0:f7c60d3e7b8a 2341 seq_cur = cert_cur->ext_key_usage.next;
maclobdell 0:f7c60d3e7b8a 2342 while( seq_cur != NULL )
maclobdell 0:f7c60d3e7b8a 2343 {
maclobdell 0:f7c60d3e7b8a 2344 seq_prv = seq_cur;
maclobdell 0:f7c60d3e7b8a 2345 seq_cur = seq_cur->next;
maclobdell 0:f7c60d3e7b8a 2346 mbedtls_zeroize( seq_prv, sizeof( mbedtls_x509_sequence ) );
maclobdell 0:f7c60d3e7b8a 2347 mbedtls_free( seq_prv );
maclobdell 0:f7c60d3e7b8a 2348 }
maclobdell 0:f7c60d3e7b8a 2349
maclobdell 0:f7c60d3e7b8a 2350 seq_cur = cert_cur->subject_alt_names.next;
maclobdell 0:f7c60d3e7b8a 2351 while( seq_cur != NULL )
maclobdell 0:f7c60d3e7b8a 2352 {
maclobdell 0:f7c60d3e7b8a 2353 seq_prv = seq_cur;
maclobdell 0:f7c60d3e7b8a 2354 seq_cur = seq_cur->next;
maclobdell 0:f7c60d3e7b8a 2355 mbedtls_zeroize( seq_prv, sizeof( mbedtls_x509_sequence ) );
maclobdell 0:f7c60d3e7b8a 2356 mbedtls_free( seq_prv );
maclobdell 0:f7c60d3e7b8a 2357 }
maclobdell 0:f7c60d3e7b8a 2358
maclobdell 0:f7c60d3e7b8a 2359 if( cert_cur->raw.p != NULL )
maclobdell 0:f7c60d3e7b8a 2360 {
maclobdell 0:f7c60d3e7b8a 2361 mbedtls_zeroize( cert_cur->raw.p, cert_cur->raw.len );
maclobdell 0:f7c60d3e7b8a 2362 mbedtls_free( cert_cur->raw.p );
maclobdell 0:f7c60d3e7b8a 2363 }
maclobdell 0:f7c60d3e7b8a 2364
maclobdell 0:f7c60d3e7b8a 2365 cert_cur = cert_cur->next;
maclobdell 0:f7c60d3e7b8a 2366 }
maclobdell 0:f7c60d3e7b8a 2367 while( cert_cur != NULL );
maclobdell 0:f7c60d3e7b8a 2368
maclobdell 0:f7c60d3e7b8a 2369 cert_cur = crt;
maclobdell 0:f7c60d3e7b8a 2370 do
maclobdell 0:f7c60d3e7b8a 2371 {
maclobdell 0:f7c60d3e7b8a 2372 cert_prv = cert_cur;
maclobdell 0:f7c60d3e7b8a 2373 cert_cur = cert_cur->next;
maclobdell 0:f7c60d3e7b8a 2374
maclobdell 0:f7c60d3e7b8a 2375 mbedtls_zeroize( cert_prv, sizeof( mbedtls_x509_crt ) );
maclobdell 0:f7c60d3e7b8a 2376 if( cert_prv != crt )
maclobdell 0:f7c60d3e7b8a 2377 mbedtls_free( cert_prv );
maclobdell 0:f7c60d3e7b8a 2378 }
maclobdell 0:f7c60d3e7b8a 2379 while( cert_cur != NULL );
maclobdell 0:f7c60d3e7b8a 2380 }
maclobdell 0:f7c60d3e7b8a 2381
maclobdell 0:f7c60d3e7b8a 2382 #endif /* MBEDTLS_X509_CRT_PARSE_C */