Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1 | /* |
| 2 | * X.509 certificate and private key decoding |
| 3 | * |
Paul Bakker | 84f12b7 | 2010-07-18 10:13:04 +0000 | [diff] [blame] | 4 | * Copyright (C) 2006-2010, Brainspark B.V. |
Paul Bakker | b96f154 | 2010-07-18 20:36:00 +0000 | [diff] [blame] | 5 | * |
| 6 | * This file is part of PolarSSL (http://www.polarssl.org) |
Paul Bakker | 84f12b7 | 2010-07-18 10:13:04 +0000 | [diff] [blame] | 7 | * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> |
Paul Bakker | b96f154 | 2010-07-18 20:36:00 +0000 | [diff] [blame] | 8 | * |
Paul Bakker | 77b385e | 2009-07-28 17:23:11 +0000 | [diff] [blame] | 9 | * All rights reserved. |
Paul Bakker | e0ccd0a | 2009-01-04 16:27:10 +0000 | [diff] [blame] | 10 | * |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License along |
| 22 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 23 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 24 | */ |
| 25 | /* |
| 26 | * The ITU-T X.509 standard defines a certificat format for PKI. |
| 27 | * |
| 28 | * http://www.ietf.org/rfc/rfc2459.txt |
| 29 | * http://www.ietf.org/rfc/rfc3279.txt |
| 30 | * |
| 31 | * ftp://ftp.rsasecurity.com/pub/pkcs/ascii/pkcs-1v2.asc |
| 32 | * |
| 33 | * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf |
| 34 | * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf |
| 35 | */ |
| 36 | |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 37 | #include "polarssl/config.h" |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 38 | |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 39 | #if defined(POLARSSL_X509_PARSE_C) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 40 | |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 41 | #include "polarssl/x509.h" |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 42 | #include "polarssl/pem.h" |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 43 | #include "polarssl/des.h" |
| 44 | #include "polarssl/md2.h" |
| 45 | #include "polarssl/md4.h" |
| 46 | #include "polarssl/md5.h" |
| 47 | #include "polarssl/sha1.h" |
Paul Bakker | 026c03b | 2009-03-28 17:53:03 +0000 | [diff] [blame] | 48 | #include "polarssl/sha2.h" |
| 49 | #include "polarssl/sha4.h" |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 50 | #include "polarssl/dhm.h" |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 51 | |
| 52 | #include <string.h> |
| 53 | #include <stdlib.h> |
| 54 | #include <stdio.h> |
| 55 | #include <time.h> |
| 56 | |
| 57 | /* |
| 58 | * ASN.1 DER decoding routines |
| 59 | */ |
| 60 | static int asn1_get_len( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 61 | const unsigned char *end, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 62 | int *len ) |
| 63 | { |
| 64 | if( ( end - *p ) < 1 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 65 | return( POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 66 | |
| 67 | if( ( **p & 0x80 ) == 0 ) |
| 68 | *len = *(*p)++; |
| 69 | else |
| 70 | { |
| 71 | switch( **p & 0x7F ) |
| 72 | { |
| 73 | case 1: |
| 74 | if( ( end - *p ) < 2 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 75 | return( POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 76 | |
| 77 | *len = (*p)[1]; |
| 78 | (*p) += 2; |
| 79 | break; |
| 80 | |
| 81 | case 2: |
| 82 | if( ( end - *p ) < 3 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 83 | return( POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 84 | |
| 85 | *len = ( (*p)[1] << 8 ) | (*p)[2]; |
| 86 | (*p) += 3; |
| 87 | break; |
| 88 | |
| 89 | default: |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 90 | return( POLARSSL_ERR_ASN1_INVALID_LENGTH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 91 | break; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | if( *len > (int) ( end - *p ) ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 96 | return( POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 97 | |
| 98 | return( 0 ); |
| 99 | } |
| 100 | |
| 101 | static int asn1_get_tag( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 102 | const unsigned char *end, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 103 | int *len, int tag ) |
| 104 | { |
| 105 | if( ( end - *p ) < 1 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 106 | return( POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 107 | |
| 108 | if( **p != tag ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 109 | return( POLARSSL_ERR_ASN1_UNEXPECTED_TAG ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 110 | |
| 111 | (*p)++; |
| 112 | |
| 113 | return( asn1_get_len( p, end, len ) ); |
| 114 | } |
| 115 | |
| 116 | static int asn1_get_bool( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 117 | const unsigned char *end, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 118 | int *val ) |
| 119 | { |
| 120 | int ret, len; |
| 121 | |
| 122 | if( ( ret = asn1_get_tag( p, end, &len, ASN1_BOOLEAN ) ) != 0 ) |
| 123 | return( ret ); |
| 124 | |
| 125 | if( len != 1 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 126 | return( POLARSSL_ERR_ASN1_INVALID_LENGTH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 127 | |
| 128 | *val = ( **p != 0 ) ? 1 : 0; |
| 129 | (*p)++; |
| 130 | |
| 131 | return( 0 ); |
| 132 | } |
| 133 | |
| 134 | static int asn1_get_int( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 135 | const unsigned char *end, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 136 | int *val ) |
| 137 | { |
| 138 | int ret, len; |
| 139 | |
| 140 | if( ( ret = asn1_get_tag( p, end, &len, ASN1_INTEGER ) ) != 0 ) |
| 141 | return( ret ); |
| 142 | |
| 143 | if( len > (int) sizeof( int ) || ( **p & 0x80 ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 144 | return( POLARSSL_ERR_ASN1_INVALID_LENGTH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 145 | |
| 146 | *val = 0; |
| 147 | |
| 148 | while( len-- > 0 ) |
| 149 | { |
| 150 | *val = ( *val << 8 ) | **p; |
| 151 | (*p)++; |
| 152 | } |
| 153 | |
| 154 | return( 0 ); |
| 155 | } |
| 156 | |
| 157 | static int asn1_get_mpi( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 158 | const unsigned char *end, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 159 | mpi *X ) |
| 160 | { |
| 161 | int ret, len; |
| 162 | |
| 163 | if( ( ret = asn1_get_tag( p, end, &len, ASN1_INTEGER ) ) != 0 ) |
| 164 | return( ret ); |
| 165 | |
| 166 | ret = mpi_read_binary( X, *p, len ); |
| 167 | |
| 168 | *p += len; |
| 169 | |
| 170 | return( ret ); |
| 171 | } |
| 172 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 173 | static int asn1_get_bitstring( unsigned char **p, const unsigned char *end, |
| 174 | x509_bitstring *bs) |
| 175 | { |
| 176 | int ret; |
| 177 | |
| 178 | /* Certificate type is a single byte bitstring */ |
| 179 | if( ( ret = asn1_get_tag( p, end, &bs->len, ASN1_BIT_STRING ) ) != 0 ) |
| 180 | return( ret ); |
| 181 | |
| 182 | /* Check length, subtract one for actual bit string length */ |
| 183 | if ( bs->len < 1 ) |
| 184 | return( POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
| 185 | bs->len -= 1; |
| 186 | |
| 187 | /* Get number of unused bits, ensure unused bits <= 7 */ |
| 188 | bs->unused_bits = **p; |
| 189 | if( bs->unused_bits > 7 ) |
| 190 | return( POLARSSL_ERR_ASN1_INVALID_LENGTH ); |
| 191 | (*p)++; |
| 192 | |
| 193 | /* Get actual bitstring */ |
| 194 | bs->p = *p; |
| 195 | *p += bs->len; |
| 196 | |
| 197 | if( *p != end ) |
| 198 | return( POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| 199 | |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | |
| 204 | /* |
| 205 | * Parses and splits an ASN.1 "SEQUENCE OF <tag>" |
| 206 | */ |
| 207 | static int asn1_get_sequence_of( unsigned char **p, |
| 208 | const unsigned char *end, |
| 209 | x509_sequence *cur, |
| 210 | int tag) |
| 211 | { |
| 212 | int ret, len; |
| 213 | x509_buf *buf; |
| 214 | |
| 215 | /* Get main sequence tag */ |
| 216 | if( ( ret = asn1_get_tag( p, end, &len, |
| 217 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 218 | return( ret ); |
| 219 | |
| 220 | if( *p + len != end ) |
| 221 | return( POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| 222 | |
| 223 | while( *p < end ) |
| 224 | { |
| 225 | buf = &(cur->buf); |
| 226 | buf->tag = **p; |
| 227 | |
| 228 | if( ( ret = asn1_get_tag( p, end, &buf->len, tag ) ) != 0 ) |
| 229 | return( ret ); |
| 230 | |
| 231 | buf->p = *p; |
| 232 | *p += buf->len; |
| 233 | |
| 234 | /* Allocate and assign next pointer */ |
| 235 | if (*p < end) |
| 236 | { |
| 237 | cur->next = (x509_sequence *) malloc( |
| 238 | sizeof( x509_sequence ) ); |
| 239 | |
| 240 | if( cur->next == NULL ) |
| 241 | return( 1 ); |
| 242 | |
| 243 | cur = cur->next; |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | /* Set final sequence entry's next pointer to NULL */ |
| 248 | cur->next = NULL; |
| 249 | |
| 250 | if( *p != end ) |
| 251 | return( POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| 252 | |
| 253 | return( 0 ); |
| 254 | } |
| 255 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 256 | /* |
| 257 | * Version ::= INTEGER { v1(0), v2(1), v3(2) } |
| 258 | */ |
| 259 | static int x509_get_version( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 260 | const unsigned char *end, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 261 | int *ver ) |
| 262 | { |
| 263 | int ret, len; |
| 264 | |
| 265 | if( ( ret = asn1_get_tag( p, end, &len, |
| 266 | ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | 0 ) ) != 0 ) |
| 267 | { |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 268 | if( ret == POLARSSL_ERR_ASN1_UNEXPECTED_TAG ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 269 | return( *ver = 0 ); |
| 270 | |
| 271 | return( ret ); |
| 272 | } |
| 273 | |
| 274 | end = *p + len; |
| 275 | |
| 276 | if( ( ret = asn1_get_int( p, end, ver ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 277 | return( POLARSSL_ERR_X509_CERT_INVALID_VERSION | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 278 | |
| 279 | if( *p != end ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 280 | return( POLARSSL_ERR_X509_CERT_INVALID_VERSION | |
| 281 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 282 | |
| 283 | return( 0 ); |
| 284 | } |
| 285 | |
| 286 | /* |
| 287 | * CertificateSerialNumber ::= INTEGER |
| 288 | */ |
| 289 | static int x509_get_serial( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 290 | const unsigned char *end, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 291 | x509_buf *serial ) |
| 292 | { |
| 293 | int ret; |
| 294 | |
| 295 | if( ( end - *p ) < 1 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 296 | return( POLARSSL_ERR_X509_CERT_INVALID_SERIAL | |
| 297 | POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 298 | |
| 299 | if( **p != ( ASN1_CONTEXT_SPECIFIC | ASN1_PRIMITIVE | 2 ) && |
| 300 | **p != ASN1_INTEGER ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 301 | return( POLARSSL_ERR_X509_CERT_INVALID_SERIAL | |
| 302 | POLARSSL_ERR_ASN1_UNEXPECTED_TAG ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 303 | |
| 304 | serial->tag = *(*p)++; |
| 305 | |
| 306 | if( ( ret = asn1_get_len( p, end, &serial->len ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 307 | return( POLARSSL_ERR_X509_CERT_INVALID_SERIAL | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 308 | |
| 309 | serial->p = *p; |
| 310 | *p += serial->len; |
| 311 | |
| 312 | return( 0 ); |
| 313 | } |
| 314 | |
| 315 | /* |
| 316 | * AlgorithmIdentifier ::= SEQUENCE { |
| 317 | * algorithm OBJECT IDENTIFIER, |
| 318 | * parameters ANY DEFINED BY algorithm OPTIONAL } |
| 319 | */ |
| 320 | static int x509_get_alg( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 321 | const unsigned char *end, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 322 | x509_buf *alg ) |
| 323 | { |
| 324 | int ret, len; |
| 325 | |
| 326 | if( ( ret = asn1_get_tag( p, end, &len, |
| 327 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 328 | return( POLARSSL_ERR_X509_CERT_INVALID_ALG | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 329 | |
| 330 | end = *p + len; |
| 331 | alg->tag = **p; |
| 332 | |
| 333 | if( ( ret = asn1_get_tag( p, end, &alg->len, ASN1_OID ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 334 | return( POLARSSL_ERR_X509_CERT_INVALID_ALG | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 335 | |
| 336 | alg->p = *p; |
| 337 | *p += alg->len; |
| 338 | |
| 339 | if( *p == end ) |
| 340 | return( 0 ); |
| 341 | |
| 342 | /* |
| 343 | * assume the algorithm parameters must be NULL |
| 344 | */ |
| 345 | if( ( ret = asn1_get_tag( p, end, &len, ASN1_NULL ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 346 | return( POLARSSL_ERR_X509_CERT_INVALID_ALG | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 347 | |
| 348 | if( *p != end ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 349 | return( POLARSSL_ERR_X509_CERT_INVALID_ALG | |
| 350 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 351 | |
| 352 | return( 0 ); |
| 353 | } |
| 354 | |
| 355 | /* |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 356 | * AttributeTypeAndValue ::= SEQUENCE { |
| 357 | * type AttributeType, |
| 358 | * value AttributeValue } |
| 359 | * |
| 360 | * AttributeType ::= OBJECT IDENTIFIER |
| 361 | * |
| 362 | * AttributeValue ::= ANY DEFINED BY AttributeType |
| 363 | */ |
Paul Bakker | 400ff6f | 2011-02-20 10:40:16 +0000 | [diff] [blame] | 364 | static int x509_get_attr_type_value( unsigned char **p, |
| 365 | const unsigned char *end, |
| 366 | x509_name *cur ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 367 | { |
| 368 | int ret, len; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 369 | x509_buf *oid; |
| 370 | x509_buf *val; |
| 371 | |
| 372 | if( ( ret = asn1_get_tag( p, end, &len, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 373 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 374 | return( POLARSSL_ERR_X509_CERT_INVALID_NAME | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 375 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 376 | oid = &cur->oid; |
| 377 | oid->tag = **p; |
| 378 | |
| 379 | if( ( ret = asn1_get_tag( p, end, &oid->len, ASN1_OID ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 380 | return( POLARSSL_ERR_X509_CERT_INVALID_NAME | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 381 | |
| 382 | oid->p = *p; |
| 383 | *p += oid->len; |
| 384 | |
| 385 | if( ( end - *p ) < 1 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 386 | return( POLARSSL_ERR_X509_CERT_INVALID_NAME | |
| 387 | POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 388 | |
| 389 | if( **p != ASN1_BMP_STRING && **p != ASN1_UTF8_STRING && |
| 390 | **p != ASN1_T61_STRING && **p != ASN1_PRINTABLE_STRING && |
| 391 | **p != ASN1_IA5_STRING && **p != ASN1_UNIVERSAL_STRING ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 392 | return( POLARSSL_ERR_X509_CERT_INVALID_NAME | |
| 393 | POLARSSL_ERR_ASN1_UNEXPECTED_TAG ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 394 | |
| 395 | val = &cur->val; |
| 396 | val->tag = *(*p)++; |
| 397 | |
| 398 | if( ( ret = asn1_get_len( p, end, &val->len ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 399 | return( POLARSSL_ERR_X509_CERT_INVALID_NAME | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 400 | |
| 401 | val->p = *p; |
| 402 | *p += val->len; |
| 403 | |
| 404 | cur->next = NULL; |
| 405 | |
Paul Bakker | 400ff6f | 2011-02-20 10:40:16 +0000 | [diff] [blame] | 406 | return( 0 ); |
| 407 | } |
| 408 | |
| 409 | /* |
| 410 | * RelativeDistinguishedName ::= |
| 411 | * SET OF AttributeTypeAndValue |
| 412 | * |
| 413 | * AttributeTypeAndValue ::= SEQUENCE { |
| 414 | * type AttributeType, |
| 415 | * value AttributeValue } |
| 416 | * |
| 417 | * AttributeType ::= OBJECT IDENTIFIER |
| 418 | * |
| 419 | * AttributeValue ::= ANY DEFINED BY AttributeType |
| 420 | */ |
| 421 | static int x509_get_name( unsigned char **p, |
| 422 | const unsigned char *end, |
| 423 | x509_name *cur ) |
| 424 | { |
| 425 | int ret, len; |
| 426 | const unsigned char *end2; |
| 427 | x509_name *use; |
| 428 | |
| 429 | if( ( ret = asn1_get_tag( p, end, &len, |
| 430 | ASN1_CONSTRUCTED | ASN1_SET ) ) != 0 ) |
| 431 | return( POLARSSL_ERR_X509_CERT_INVALID_NAME | ret ); |
| 432 | |
| 433 | end2 = end; |
| 434 | end = *p + len; |
| 435 | use = cur; |
| 436 | |
| 437 | do |
| 438 | { |
| 439 | if( ( ret = x509_get_attr_type_value( p, end, use ) ) != 0 ) |
| 440 | return( ret ); |
| 441 | |
| 442 | if( *p != end ) |
| 443 | { |
| 444 | use->next = (x509_name *) malloc( |
| 445 | sizeof( x509_name ) ); |
| 446 | |
| 447 | if( use->next == NULL ) |
| 448 | return( 1 ); |
| 449 | |
| 450 | memset( use->next, 0, sizeof( x509_name ) ); |
| 451 | |
| 452 | use = use->next; |
| 453 | } |
| 454 | } |
| 455 | while( *p != end ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 456 | |
| 457 | /* |
| 458 | * recurse until end of SEQUENCE is reached |
| 459 | */ |
| 460 | if( *p == end2 ) |
| 461 | return( 0 ); |
| 462 | |
| 463 | cur->next = (x509_name *) malloc( |
| 464 | sizeof( x509_name ) ); |
| 465 | |
| 466 | if( cur->next == NULL ) |
| 467 | return( 1 ); |
| 468 | |
| 469 | return( x509_get_name( p, end2, cur->next ) ); |
| 470 | } |
| 471 | |
| 472 | /* |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 473 | * Time ::= CHOICE { |
| 474 | * utcTime UTCTime, |
| 475 | * generalTime GeneralizedTime } |
| 476 | */ |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 477 | static int x509_get_time( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 478 | const unsigned char *end, |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 479 | x509_time *time ) |
| 480 | { |
| 481 | int ret, len; |
| 482 | char date[64]; |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 483 | unsigned char tag; |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 484 | |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 485 | if( ( end - *p ) < 1 ) |
| 486 | return( POLARSSL_ERR_X509_CERT_INVALID_DATE | POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 487 | |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 488 | tag = **p; |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 489 | |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 490 | if ( tag == ASN1_UTC_TIME ) |
| 491 | { |
| 492 | (*p)++; |
| 493 | ret = asn1_get_len( p, end, &len ); |
| 494 | |
| 495 | if( ret != 0 ) |
| 496 | return( POLARSSL_ERR_X509_CERT_INVALID_DATE | ret ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 497 | |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 498 | memset( date, 0, sizeof( date ) ); |
| 499 | memcpy( date, *p, ( len < (int) sizeof( date ) - 1 ) ? |
| 500 | len : (int) sizeof( date ) - 1 ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 501 | |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 502 | if( sscanf( date, "%2d%2d%2d%2d%2d%2d", |
| 503 | &time->year, &time->mon, &time->day, |
| 504 | &time->hour, &time->min, &time->sec ) < 5 ) |
| 505 | return( POLARSSL_ERR_X509_CERT_INVALID_DATE ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 506 | |
Paul Bakker | 400ff6f | 2011-02-20 10:40:16 +0000 | [diff] [blame] | 507 | time->year += 100 * ( time->year < 50 ); |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 508 | time->year += 1900; |
| 509 | |
| 510 | *p += len; |
| 511 | |
| 512 | return( 0 ); |
| 513 | } |
| 514 | else if ( tag == ASN1_GENERALIZED_TIME ) |
| 515 | { |
| 516 | (*p)++; |
| 517 | ret = asn1_get_len( p, end, &len ); |
| 518 | |
| 519 | if( ret != 0 ) |
| 520 | return( POLARSSL_ERR_X509_CERT_INVALID_DATE | ret ); |
| 521 | |
| 522 | memset( date, 0, sizeof( date ) ); |
| 523 | memcpy( date, *p, ( len < (int) sizeof( date ) - 1 ) ? |
| 524 | len : (int) sizeof( date ) - 1 ); |
| 525 | |
| 526 | if( sscanf( date, "%4d%2d%2d%2d%2d%2d", |
| 527 | &time->year, &time->mon, &time->day, |
| 528 | &time->hour, &time->min, &time->sec ) < 5 ) |
| 529 | return( POLARSSL_ERR_X509_CERT_INVALID_DATE ); |
| 530 | |
| 531 | *p += len; |
| 532 | |
| 533 | return( 0 ); |
| 534 | } |
| 535 | else |
| 536 | return( POLARSSL_ERR_X509_CERT_INVALID_DATE | POLARSSL_ERR_ASN1_UNEXPECTED_TAG ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | |
| 540 | /* |
| 541 | * Validity ::= SEQUENCE { |
| 542 | * notBefore Time, |
| 543 | * notAfter Time } |
| 544 | */ |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 545 | static int x509_get_dates( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 546 | const unsigned char *end, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 547 | x509_time *from, |
| 548 | x509_time *to ) |
| 549 | { |
| 550 | int ret, len; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 551 | |
| 552 | if( ( ret = asn1_get_tag( p, end, &len, |
| 553 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 554 | return( POLARSSL_ERR_X509_CERT_INVALID_DATE | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 555 | |
| 556 | end = *p + len; |
| 557 | |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 558 | if( ( ret = x509_get_time( p, end, from ) ) != 0 ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 559 | return( ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 560 | |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 561 | if( ( ret = x509_get_time( p, end, to ) ) != 0 ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 562 | return( ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 563 | |
| 564 | if( *p != end ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 565 | return( POLARSSL_ERR_X509_CERT_INVALID_DATE | |
| 566 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 567 | |
| 568 | return( 0 ); |
| 569 | } |
| 570 | |
| 571 | /* |
| 572 | * SubjectPublicKeyInfo ::= SEQUENCE { |
| 573 | * algorithm AlgorithmIdentifier, |
| 574 | * subjectPublicKey BIT STRING } |
| 575 | */ |
| 576 | static int x509_get_pubkey( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 577 | const unsigned char *end, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 578 | x509_buf *pk_alg_oid, |
| 579 | mpi *N, mpi *E ) |
| 580 | { |
Paul Bakker | 400ff6f | 2011-02-20 10:40:16 +0000 | [diff] [blame] | 581 | int ret, len, can_handle; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 582 | unsigned char *end2; |
| 583 | |
| 584 | if( ( ret = x509_get_alg( p, end, pk_alg_oid ) ) != 0 ) |
| 585 | return( ret ); |
| 586 | |
| 587 | /* |
| 588 | * only RSA public keys handled at this time |
| 589 | */ |
Paul Bakker | 400ff6f | 2011-02-20 10:40:16 +0000 | [diff] [blame] | 590 | can_handle = 0; |
| 591 | |
| 592 | if( pk_alg_oid->len == 9 && |
| 593 | memcmp( pk_alg_oid->p, OID_PKCS1_RSA, 9 ) == 0 ) |
| 594 | can_handle = 1; |
| 595 | |
| 596 | if( pk_alg_oid->len == 9 && |
| 597 | memcmp( pk_alg_oid->p, OID_PKCS1, 8 ) == 0 ) |
| 598 | { |
| 599 | if( pk_alg_oid->p[8] >= 2 && pk_alg_oid->p[8] <= 5 ) |
| 600 | can_handle = 1; |
| 601 | |
| 602 | if ( pk_alg_oid->p[8] >= 11 && pk_alg_oid->p[8] <= 14 ) |
| 603 | can_handle = 1; |
| 604 | } |
| 605 | |
| 606 | if( pk_alg_oid->len == 5 && |
| 607 | memcmp( pk_alg_oid->p, OID_RSA_SHA_OBS, 5 ) == 0 ) |
| 608 | can_handle = 1; |
| 609 | |
| 610 | if( can_handle == 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 611 | return( POLARSSL_ERR_X509_CERT_UNKNOWN_PK_ALG ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 612 | |
| 613 | if( ( ret = asn1_get_tag( p, end, &len, ASN1_BIT_STRING ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 614 | return( POLARSSL_ERR_X509_CERT_INVALID_PUBKEY | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 615 | |
| 616 | if( ( end - *p ) < 1 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 617 | return( POLARSSL_ERR_X509_CERT_INVALID_PUBKEY | |
| 618 | POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 619 | |
| 620 | end2 = *p + len; |
| 621 | |
| 622 | if( *(*p)++ != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 623 | return( POLARSSL_ERR_X509_CERT_INVALID_PUBKEY ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 624 | |
| 625 | /* |
| 626 | * RSAPublicKey ::= SEQUENCE { |
| 627 | * modulus INTEGER, -- n |
| 628 | * publicExponent INTEGER -- e |
| 629 | * } |
| 630 | */ |
| 631 | if( ( ret = asn1_get_tag( p, end2, &len, |
| 632 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 633 | return( POLARSSL_ERR_X509_CERT_INVALID_PUBKEY | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 634 | |
| 635 | if( *p + len != end2 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 636 | return( POLARSSL_ERR_X509_CERT_INVALID_PUBKEY | |
| 637 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 638 | |
| 639 | if( ( ret = asn1_get_mpi( p, end2, N ) ) != 0 || |
| 640 | ( ret = asn1_get_mpi( p, end2, E ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 641 | return( POLARSSL_ERR_X509_CERT_INVALID_PUBKEY | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 642 | |
| 643 | if( *p != end ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 644 | return( POLARSSL_ERR_X509_CERT_INVALID_PUBKEY | |
| 645 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 646 | |
| 647 | return( 0 ); |
| 648 | } |
| 649 | |
| 650 | static int x509_get_sig( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 651 | const unsigned char *end, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 652 | x509_buf *sig ) |
| 653 | { |
| 654 | int ret, len; |
| 655 | |
| 656 | sig->tag = **p; |
| 657 | |
| 658 | if( ( ret = asn1_get_tag( p, end, &len, ASN1_BIT_STRING ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 659 | return( POLARSSL_ERR_X509_CERT_INVALID_SIGNATURE | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 660 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 661 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 662 | if( --len < 1 || *(*p)++ != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 663 | return( POLARSSL_ERR_X509_CERT_INVALID_SIGNATURE ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 664 | |
| 665 | sig->len = len; |
| 666 | sig->p = *p; |
| 667 | |
| 668 | *p += len; |
| 669 | |
| 670 | return( 0 ); |
| 671 | } |
| 672 | |
| 673 | /* |
| 674 | * X.509 v2/v3 unique identifier (not parsed) |
| 675 | */ |
| 676 | static int x509_get_uid( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 677 | const unsigned char *end, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 678 | x509_buf *uid, int n ) |
| 679 | { |
| 680 | int ret; |
| 681 | |
| 682 | if( *p == end ) |
| 683 | return( 0 ); |
| 684 | |
| 685 | uid->tag = **p; |
| 686 | |
| 687 | if( ( ret = asn1_get_tag( p, end, &uid->len, |
| 688 | ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | n ) ) != 0 ) |
| 689 | { |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 690 | if( ret == POLARSSL_ERR_ASN1_UNEXPECTED_TAG ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 691 | return( 0 ); |
| 692 | |
| 693 | return( ret ); |
| 694 | } |
| 695 | |
| 696 | uid->p = *p; |
| 697 | *p += uid->len; |
| 698 | |
| 699 | return( 0 ); |
| 700 | } |
| 701 | |
| 702 | /* |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 703 | * X.509 Extensions (No parsing of extensions, pointer should |
| 704 | * be either manually updated or extensions should be parsed! |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 705 | */ |
| 706 | static int x509_get_ext( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 707 | const unsigned char *end, |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 708 | x509_buf *ext ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 709 | { |
| 710 | int ret, len; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 711 | |
| 712 | if( *p == end ) |
| 713 | return( 0 ); |
| 714 | |
| 715 | ext->tag = **p; |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 716 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 717 | if( ( ret = asn1_get_tag( p, end, &ext->len, |
| 718 | ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | 3 ) ) != 0 ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 719 | return( ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 720 | |
| 721 | ext->p = *p; |
| 722 | end = *p + ext->len; |
| 723 | |
| 724 | /* |
| 725 | * Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension |
| 726 | * |
| 727 | * Extension ::= SEQUENCE { |
| 728 | * extnID OBJECT IDENTIFIER, |
| 729 | * critical BOOLEAN DEFAULT FALSE, |
| 730 | * extnValue OCTET STRING } |
| 731 | */ |
| 732 | if( ( ret = asn1_get_tag( p, end, &len, |
| 733 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 734 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 735 | |
| 736 | if( end != *p + len ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 737 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | |
| 738 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 739 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 740 | return( 0 ); |
| 741 | } |
| 742 | |
| 743 | /* |
| 744 | * X.509 CRL v2 extensions (no extensions parsed yet.) |
| 745 | */ |
| 746 | static int x509_get_crl_ext( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 747 | const unsigned char *end, |
| 748 | x509_buf *ext ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 749 | { |
| 750 | int ret, len; |
| 751 | |
| 752 | if( ( ret = x509_get_ext( p, end, ext ) ) != 0 ) |
| 753 | { |
| 754 | if( ret == POLARSSL_ERR_ASN1_UNEXPECTED_TAG ) |
| 755 | return( 0 ); |
| 756 | |
| 757 | return( ret ); |
| 758 | } |
| 759 | |
| 760 | while( *p < end ) |
| 761 | { |
| 762 | if( ( ret = asn1_get_tag( p, end, &len, |
| 763 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 764 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | ret ); |
| 765 | |
| 766 | *p += len; |
| 767 | } |
| 768 | |
| 769 | if( *p != end ) |
| 770 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | |
| 771 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| 772 | |
| 773 | return( 0 ); |
| 774 | } |
| 775 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 776 | static int x509_get_basic_constraints( unsigned char **p, |
| 777 | const unsigned char *end, |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 778 | int *ca_istrue, |
| 779 | int *max_pathlen ) |
| 780 | { |
| 781 | int ret, len; |
| 782 | |
| 783 | /* |
| 784 | * BasicConstraints ::= SEQUENCE { |
| 785 | * cA BOOLEAN DEFAULT FALSE, |
| 786 | * pathLenConstraint INTEGER (0..MAX) OPTIONAL } |
| 787 | */ |
Paul Bakker | 3cccddb | 2011-01-16 21:46:31 +0000 | [diff] [blame] | 788 | *ca_istrue = 0; /* DEFAULT FALSE */ |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 789 | *max_pathlen = 0; /* endless */ |
| 790 | |
| 791 | if( ( ret = asn1_get_tag( p, end, &len, |
| 792 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 793 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | ret ); |
| 794 | |
| 795 | if( *p == end ) |
| 796 | return 0; |
| 797 | |
Paul Bakker | 3cccddb | 2011-01-16 21:46:31 +0000 | [diff] [blame] | 798 | if( ( ret = asn1_get_bool( p, end, ca_istrue ) ) != 0 ) |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 799 | { |
| 800 | if( ret == POLARSSL_ERR_ASN1_UNEXPECTED_TAG ) |
Paul Bakker | 3cccddb | 2011-01-16 21:46:31 +0000 | [diff] [blame] | 801 | ret = asn1_get_int( p, end, ca_istrue ); |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 802 | |
| 803 | if( ret != 0 ) |
| 804 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | ret ); |
| 805 | |
Paul Bakker | 3cccddb | 2011-01-16 21:46:31 +0000 | [diff] [blame] | 806 | if( *ca_istrue != 0 ) |
| 807 | *ca_istrue = 1; |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 808 | } |
| 809 | |
| 810 | if( *p == end ) |
| 811 | return 0; |
| 812 | |
| 813 | if( ( ret = asn1_get_int( p, end, max_pathlen ) ) != 0 ) |
| 814 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | ret ); |
| 815 | |
| 816 | if( *p != end ) |
| 817 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | |
| 818 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| 819 | |
| 820 | (*max_pathlen)++; |
| 821 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 822 | return 0; |
| 823 | } |
| 824 | |
| 825 | static int x509_get_ns_cert_type( unsigned char **p, |
| 826 | const unsigned char *end, |
| 827 | unsigned char *ns_cert_type) |
| 828 | { |
| 829 | int ret; |
Paul Bakker | d61e7d9 | 2011-01-18 16:17:47 +0000 | [diff] [blame] | 830 | x509_bitstring bs = { 0, 0, NULL }; |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 831 | |
| 832 | if( ( ret = asn1_get_bitstring( p, end, &bs ) ) != 0 ) |
| 833 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | ret ); |
| 834 | |
| 835 | if( bs.len != 1 ) |
| 836 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | |
| 837 | POLARSSL_ERR_ASN1_INVALID_LENGTH ); |
| 838 | |
| 839 | /* Get actual bitstring */ |
| 840 | *ns_cert_type = *bs.p; |
| 841 | return 0; |
| 842 | } |
| 843 | |
| 844 | static int x509_get_key_usage( unsigned char **p, |
| 845 | const unsigned char *end, |
| 846 | unsigned char *key_usage) |
| 847 | { |
| 848 | int ret; |
Paul Bakker | d61e7d9 | 2011-01-18 16:17:47 +0000 | [diff] [blame] | 849 | x509_bitstring bs = { 0, 0, NULL }; |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 850 | |
| 851 | if( ( ret = asn1_get_bitstring( p, end, &bs ) ) != 0 ) |
| 852 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | ret ); |
| 853 | |
| 854 | if( bs.len != 1 ) |
| 855 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | |
| 856 | POLARSSL_ERR_ASN1_INVALID_LENGTH ); |
| 857 | |
| 858 | /* Get actual bitstring */ |
| 859 | *key_usage = *bs.p; |
| 860 | return 0; |
| 861 | } |
| 862 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 863 | /* |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 864 | * ExtKeyUsageSyntax ::= SEQUENCE SIZE (1..MAX) OF KeyPurposeId |
| 865 | * |
| 866 | * KeyPurposeId ::= OBJECT IDENTIFIER |
| 867 | */ |
| 868 | static int x509_get_ext_key_usage( unsigned char **p, |
| 869 | const unsigned char *end, |
| 870 | x509_sequence *ext_key_usage) |
| 871 | { |
| 872 | int ret; |
| 873 | |
| 874 | if( ( ret = asn1_get_sequence_of( p, end, ext_key_usage, ASN1_OID ) ) != 0 ) |
| 875 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | ret ); |
| 876 | |
| 877 | /* Sequence length must be >= 1 */ |
| 878 | if( ext_key_usage->buf.p == NULL ) |
| 879 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | |
| 880 | POLARSSL_ERR_ASN1_INVALID_LENGTH ); |
| 881 | |
| 882 | return 0; |
| 883 | } |
| 884 | |
| 885 | /* |
| 886 | * X.509 v3 extensions |
| 887 | * |
| 888 | * TODO: Perform all of the basic constraints tests required by the RFC |
| 889 | * TODO: Set values for undetected extensions to a sane default? |
| 890 | * |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 891 | */ |
| 892 | static int x509_get_crt_ext( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 893 | const unsigned char *end, |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 894 | x509_cert *crt ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 895 | { |
| 896 | int ret, len; |
Paul Bakker | c6ce838 | 2009-07-27 21:34:45 +0000 | [diff] [blame] | 897 | unsigned char *end_ext_data, *end_ext_octet; |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 898 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 899 | if( ( ret = x509_get_ext( p, end, &crt->v3_ext ) ) != 0 ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 900 | { |
| 901 | if( ret == POLARSSL_ERR_ASN1_UNEXPECTED_TAG ) |
| 902 | return( 0 ); |
| 903 | |
| 904 | return( ret ); |
| 905 | } |
| 906 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 907 | while( *p < end ) |
| 908 | { |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 909 | /* |
| 910 | * Extension ::= SEQUENCE { |
| 911 | * extnID OBJECT IDENTIFIER, |
| 912 | * critical BOOLEAN DEFAULT FALSE, |
| 913 | * extnValue OCTET STRING } |
| 914 | */ |
| 915 | x509_buf extn_oid = {0, 0, NULL}; |
| 916 | int is_critical = 0; /* DEFAULT FALSE */ |
| 917 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 918 | if( ( ret = asn1_get_tag( p, end, &len, |
| 919 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 920 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 921 | |
Paul Bakker | c6ce838 | 2009-07-27 21:34:45 +0000 | [diff] [blame] | 922 | end_ext_data = *p + len; |
| 923 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 924 | /* Get extension ID */ |
| 925 | extn_oid.tag = **p; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 926 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 927 | if( ( ret = asn1_get_tag( p, end, &extn_oid.len, ASN1_OID ) ) != 0 ) |
| 928 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 929 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 930 | extn_oid.p = *p; |
| 931 | *p += extn_oid.len; |
| 932 | |
| 933 | if( ( end - *p ) < 1 ) |
| 934 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | |
| 935 | POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
| 936 | |
| 937 | /* Get optional critical */ |
Paul Bakker | c6ce838 | 2009-07-27 21:34:45 +0000 | [diff] [blame] | 938 | if( ( ret = asn1_get_bool( p, end_ext_data, &is_critical ) ) != 0 && |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 939 | ( ret != POLARSSL_ERR_ASN1_UNEXPECTED_TAG ) ) |
| 940 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 941 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 942 | /* Data should be octet string type */ |
Paul Bakker | c6ce838 | 2009-07-27 21:34:45 +0000 | [diff] [blame] | 943 | if( ( ret = asn1_get_tag( p, end_ext_data, &len, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 944 | ASN1_OCTET_STRING ) ) != 0 ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 945 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 946 | |
Paul Bakker | c6ce838 | 2009-07-27 21:34:45 +0000 | [diff] [blame] | 947 | end_ext_octet = *p + len; |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 948 | |
Paul Bakker | c6ce838 | 2009-07-27 21:34:45 +0000 | [diff] [blame] | 949 | if( end_ext_octet != end_ext_data ) |
| 950 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | |
| 951 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 952 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 953 | /* |
| 954 | * Detect supported extensions |
| 955 | */ |
| 956 | if( ( OID_SIZE( OID_BASIC_CONSTRAINTS ) == extn_oid.len ) && |
| 957 | memcmp( extn_oid.p, OID_BASIC_CONSTRAINTS, extn_oid.len ) == 0 ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 958 | { |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 959 | /* Parse basic constraints */ |
| 960 | if( ( ret = x509_get_basic_constraints( p, end_ext_octet, |
Paul Bakker | 3cccddb | 2011-01-16 21:46:31 +0000 | [diff] [blame] | 961 | &crt->ca_istrue, &crt->max_pathlen ) ) != 0 ) |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 962 | return ( ret ); |
| 963 | crt->ext_types |= EXT_BASIC_CONSTRAINTS; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 964 | } |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 965 | else if( ( OID_SIZE( OID_NS_CERT_TYPE ) == extn_oid.len ) && |
| 966 | memcmp( extn_oid.p, OID_NS_CERT_TYPE, extn_oid.len ) == 0 ) |
| 967 | { |
| 968 | /* Parse netscape certificate type */ |
| 969 | if( ( ret = x509_get_ns_cert_type( p, end_ext_octet, |
| 970 | &crt->ns_cert_type ) ) != 0 ) |
| 971 | return ( ret ); |
| 972 | crt->ext_types |= EXT_NS_CERT_TYPE; |
| 973 | } |
| 974 | else if( ( OID_SIZE( OID_KEY_USAGE ) == extn_oid.len ) && |
| 975 | memcmp( extn_oid.p, OID_KEY_USAGE, extn_oid.len ) == 0 ) |
| 976 | { |
| 977 | /* Parse key usage */ |
| 978 | if( ( ret = x509_get_key_usage( p, end_ext_octet, |
| 979 | &crt->key_usage ) ) != 0 ) |
| 980 | return ( ret ); |
| 981 | crt->ext_types |= EXT_KEY_USAGE; |
| 982 | } |
| 983 | else if( ( OID_SIZE( OID_EXTENDED_KEY_USAGE ) == extn_oid.len ) && |
| 984 | memcmp( extn_oid.p, OID_EXTENDED_KEY_USAGE, extn_oid.len ) == 0 ) |
| 985 | { |
| 986 | /* Parse extended key usage */ |
| 987 | if( ( ret = x509_get_ext_key_usage( p, end_ext_octet, |
| 988 | &crt->ext_key_usage ) ) != 0 ) |
| 989 | return ( ret ); |
| 990 | crt->ext_types |= EXT_EXTENDED_KEY_USAGE; |
| 991 | } |
| 992 | else |
| 993 | { |
| 994 | /* No parser found, skip extension */ |
| 995 | *p = end_ext_octet; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 996 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 997 | if( is_critical ) |
| 998 | { |
| 999 | /* Data is marked as critical: fail */ |
| 1000 | return ( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | |
| 1001 | POLARSSL_ERR_ASN1_UNEXPECTED_TAG ); |
| 1002 | } |
| 1003 | } |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1004 | } |
| 1005 | |
| 1006 | if( *p != end ) |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1007 | return( POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS | |
| 1008 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1009 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1010 | return( 0 ); |
| 1011 | } |
| 1012 | |
| 1013 | /* |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1014 | * X.509 CRL Entries |
| 1015 | */ |
| 1016 | static int x509_get_entries( unsigned char **p, |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 1017 | const unsigned char *end, |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1018 | x509_crl_entry *entry ) |
| 1019 | { |
Paul Bakker | 9be1937 | 2009-07-27 20:21:53 +0000 | [diff] [blame] | 1020 | int ret, entry_len; |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1021 | x509_crl_entry *cur_entry = entry; |
| 1022 | |
| 1023 | if( *p == end ) |
| 1024 | return( 0 ); |
| 1025 | |
Paul Bakker | 9be1937 | 2009-07-27 20:21:53 +0000 | [diff] [blame] | 1026 | if( ( ret = asn1_get_tag( p, end, &entry_len, |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1027 | ASN1_SEQUENCE | ASN1_CONSTRUCTED ) ) != 0 ) |
| 1028 | { |
| 1029 | if( ret == POLARSSL_ERR_ASN1_UNEXPECTED_TAG ) |
| 1030 | return( 0 ); |
| 1031 | |
| 1032 | return( ret ); |
| 1033 | } |
| 1034 | |
Paul Bakker | 9be1937 | 2009-07-27 20:21:53 +0000 | [diff] [blame] | 1035 | end = *p + entry_len; |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1036 | |
| 1037 | while( *p < end ) |
| 1038 | { |
| 1039 | int len2; |
| 1040 | |
| 1041 | if( ( ret = asn1_get_tag( p, end, &len2, |
| 1042 | ASN1_SEQUENCE | ASN1_CONSTRUCTED ) ) != 0 ) |
| 1043 | { |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1044 | return( ret ); |
| 1045 | } |
| 1046 | |
Paul Bakker | 9be1937 | 2009-07-27 20:21:53 +0000 | [diff] [blame] | 1047 | cur_entry->raw.tag = **p; |
| 1048 | cur_entry->raw.p = *p; |
| 1049 | cur_entry->raw.len = len2; |
| 1050 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1051 | if( ( ret = x509_get_serial( p, end, &cur_entry->serial ) ) != 0 ) |
| 1052 | return( ret ); |
| 1053 | |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 1054 | if( ( ret = x509_get_time( p, end, &cur_entry->revocation_date ) ) != 0 ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1055 | return( ret ); |
| 1056 | |
| 1057 | if( ( ret = x509_get_crl_ext( p, end, &cur_entry->entry_ext ) ) != 0 ) |
| 1058 | return( ret ); |
| 1059 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 1060 | if ( *p < end ) |
| 1061 | { |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1062 | cur_entry->next = malloc( sizeof( x509_crl_entry ) ); |
| 1063 | cur_entry = cur_entry->next; |
| 1064 | memset( cur_entry, 0, sizeof( x509_crl_entry ) ); |
| 1065 | } |
| 1066 | } |
| 1067 | |
| 1068 | return( 0 ); |
| 1069 | } |
| 1070 | |
Paul Bakker | 27d6616 | 2010-03-17 06:56:01 +0000 | [diff] [blame] | 1071 | static int x509_get_sig_alg( const x509_buf *sig_oid, int *sig_alg ) |
| 1072 | { |
| 1073 | if( sig_oid->len == 9 && |
| 1074 | memcmp( sig_oid->p, OID_PKCS1, 8 ) == 0 ) |
| 1075 | { |
| 1076 | if( sig_oid->p[8] >= 2 && sig_oid->p[8] <= 5 ) |
| 1077 | { |
| 1078 | *sig_alg = sig_oid->p[8]; |
| 1079 | return( 0 ); |
| 1080 | } |
| 1081 | |
| 1082 | if ( sig_oid->p[8] >= 11 && sig_oid->p[8] <= 14 ) |
| 1083 | { |
| 1084 | *sig_alg = sig_oid->p[8]; |
| 1085 | return( 0 ); |
| 1086 | } |
| 1087 | |
| 1088 | return( POLARSSL_ERR_X509_CERT_UNKNOWN_SIG_ALG ); |
| 1089 | } |
Paul Bakker | 400ff6f | 2011-02-20 10:40:16 +0000 | [diff] [blame] | 1090 | if( sig_oid->len == 5 && |
| 1091 | memcmp( sig_oid->p, OID_RSA_SHA_OBS, 5 ) == 0 ) |
| 1092 | { |
| 1093 | *sig_alg = SIG_RSA_SHA1; |
| 1094 | return( 0 ); |
| 1095 | } |
Paul Bakker | 27d6616 | 2010-03-17 06:56:01 +0000 | [diff] [blame] | 1096 | |
| 1097 | return( POLARSSL_ERR_X509_CERT_UNKNOWN_SIG_ALG ); |
| 1098 | } |
| 1099 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1100 | /* |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1101 | * Parse one or more certificates and add them to the chained list |
| 1102 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 1103 | int x509parse_crt( x509_cert *chain, const unsigned char *buf, int buflen ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1104 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1105 | int ret, len, use_len; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1106 | unsigned char *p, *end; |
| 1107 | x509_cert *crt; |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1108 | #if defined(POLARSSL_PEM_C) |
| 1109 | pem_context pem; |
| 1110 | #endif |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1111 | |
| 1112 | crt = chain; |
| 1113 | |
Paul Bakker | 320a4b5 | 2009-03-28 18:52:39 +0000 | [diff] [blame] | 1114 | /* |
| 1115 | * Check for valid input |
| 1116 | */ |
| 1117 | if( crt == NULL || buf == NULL ) |
| 1118 | return( 1 ); |
| 1119 | |
Paul Bakker | e9581d6 | 2009-03-28 20:29:25 +0000 | [diff] [blame] | 1120 | while( crt->version != 0 && crt->next != NULL ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1121 | crt = crt->next; |
| 1122 | |
| 1123 | /* |
Paul Bakker | 320a4b5 | 2009-03-28 18:52:39 +0000 | [diff] [blame] | 1124 | * Add new certificate on the end of the chain if needed. |
| 1125 | */ |
Paul Bakker | e9581d6 | 2009-03-28 20:29:25 +0000 | [diff] [blame] | 1126 | if ( crt->version != 0 && crt->next == NULL) |
Paul Bakker | 320a4b5 | 2009-03-28 18:52:39 +0000 | [diff] [blame] | 1127 | { |
| 1128 | crt->next = (x509_cert *) malloc( sizeof( x509_cert ) ); |
| 1129 | |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1130 | if( crt->next == NULL ) |
| 1131 | { |
Paul Bakker | 320a4b5 | 2009-03-28 18:52:39 +0000 | [diff] [blame] | 1132 | x509_free( crt ); |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1133 | return( 1 ); |
| 1134 | } |
Paul Bakker | 320a4b5 | 2009-03-28 18:52:39 +0000 | [diff] [blame] | 1135 | |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1136 | crt = crt->next; |
| 1137 | memset( crt, 0, sizeof( x509_cert ) ); |
Paul Bakker | 320a4b5 | 2009-03-28 18:52:39 +0000 | [diff] [blame] | 1138 | } |
| 1139 | |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1140 | #if defined(POLARSSL_PEM_C) |
| 1141 | pem_init( &pem ); |
| 1142 | ret = pem_read_buffer( &pem, |
| 1143 | "-----BEGIN CERTIFICATE-----", |
| 1144 | "-----END CERTIFICATE-----", |
| 1145 | buf, NULL, 0, &use_len ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1146 | |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1147 | if( ret == 0 ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1148 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1149 | /* |
| 1150 | * Was PEM encoded |
| 1151 | */ |
| 1152 | buflen -= use_len; |
| 1153 | buf += use_len; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1154 | |
| 1155 | /* |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1156 | * Steal PEM buffer |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1157 | */ |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1158 | p = pem.buf; |
| 1159 | pem.buf = NULL; |
| 1160 | len = pem.buflen; |
| 1161 | pem_free( &pem ); |
| 1162 | } |
| 1163 | else if( ret != POLARSSL_ERR_PEM_NO_HEADER_PRESENT ) |
| 1164 | { |
| 1165 | pem_free( &pem ); |
| 1166 | return( ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1167 | } |
| 1168 | else |
| 1169 | { |
| 1170 | /* |
| 1171 | * nope, copy the raw DER data |
| 1172 | */ |
| 1173 | p = (unsigned char *) malloc( len = buflen ); |
| 1174 | |
| 1175 | if( p == NULL ) |
| 1176 | return( 1 ); |
| 1177 | |
| 1178 | memcpy( p, buf, buflen ); |
| 1179 | |
| 1180 | buflen = 0; |
| 1181 | } |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1182 | #else |
| 1183 | p = (unsigned char *) malloc( len = buflen ); |
| 1184 | |
| 1185 | if( p == NULL ) |
| 1186 | return( 1 ); |
| 1187 | |
| 1188 | memcpy( p, buf, buflen ); |
| 1189 | |
| 1190 | buflen = 0; |
| 1191 | #endif |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1192 | |
| 1193 | crt->raw.p = p; |
| 1194 | crt->raw.len = len; |
| 1195 | end = p + len; |
| 1196 | |
| 1197 | /* |
| 1198 | * Certificate ::= SEQUENCE { |
| 1199 | * tbsCertificate TBSCertificate, |
| 1200 | * signatureAlgorithm AlgorithmIdentifier, |
| 1201 | * signatureValue BIT STRING } |
| 1202 | */ |
| 1203 | if( ( ret = asn1_get_tag( &p, end, &len, |
| 1204 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 1205 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1206 | x509_free( crt ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1207 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1208 | } |
| 1209 | |
| 1210 | if( len != (int) ( end - p ) ) |
| 1211 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1212 | x509_free( crt ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1213 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | |
| 1214 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1215 | } |
| 1216 | |
| 1217 | /* |
| 1218 | * TBSCertificate ::= SEQUENCE { |
| 1219 | */ |
| 1220 | crt->tbs.p = p; |
| 1221 | |
| 1222 | if( ( ret = asn1_get_tag( &p, end, &len, |
| 1223 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 1224 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1225 | x509_free( crt ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1226 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1227 | } |
| 1228 | |
| 1229 | end = p + len; |
| 1230 | crt->tbs.len = end - crt->tbs.p; |
| 1231 | |
| 1232 | /* |
| 1233 | * Version ::= INTEGER { v1(0), v2(1), v3(2) } |
| 1234 | * |
| 1235 | * CertificateSerialNumber ::= INTEGER |
| 1236 | * |
| 1237 | * signature AlgorithmIdentifier |
| 1238 | */ |
| 1239 | if( ( ret = x509_get_version( &p, end, &crt->version ) ) != 0 || |
| 1240 | ( ret = x509_get_serial( &p, end, &crt->serial ) ) != 0 || |
| 1241 | ( ret = x509_get_alg( &p, end, &crt->sig_oid1 ) ) != 0 ) |
| 1242 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1243 | x509_free( crt ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1244 | return( ret ); |
| 1245 | } |
| 1246 | |
| 1247 | crt->version++; |
| 1248 | |
| 1249 | if( crt->version > 3 ) |
| 1250 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1251 | x509_free( crt ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1252 | return( POLARSSL_ERR_X509_CERT_UNKNOWN_VERSION ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1253 | } |
| 1254 | |
Paul Bakker | 27d6616 | 2010-03-17 06:56:01 +0000 | [diff] [blame] | 1255 | if( ( ret = x509_get_sig_alg( &crt->sig_oid1, &crt->sig_alg ) ) != 0 ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1256 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1257 | x509_free( crt ); |
Paul Bakker | 27d6616 | 2010-03-17 06:56:01 +0000 | [diff] [blame] | 1258 | return( ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1259 | } |
| 1260 | |
| 1261 | /* |
| 1262 | * issuer Name |
| 1263 | */ |
| 1264 | crt->issuer_raw.p = p; |
| 1265 | |
| 1266 | if( ( ret = asn1_get_tag( &p, end, &len, |
| 1267 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 1268 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1269 | x509_free( crt ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1270 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1271 | } |
| 1272 | |
| 1273 | if( ( ret = x509_get_name( &p, p + len, &crt->issuer ) ) != 0 ) |
| 1274 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1275 | x509_free( crt ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1276 | return( ret ); |
| 1277 | } |
| 1278 | |
| 1279 | crt->issuer_raw.len = p - crt->issuer_raw.p; |
| 1280 | |
| 1281 | /* |
| 1282 | * Validity ::= SEQUENCE { |
| 1283 | * notBefore Time, |
| 1284 | * notAfter Time } |
| 1285 | * |
| 1286 | */ |
| 1287 | if( ( ret = x509_get_dates( &p, end, &crt->valid_from, |
| 1288 | &crt->valid_to ) ) != 0 ) |
| 1289 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1290 | x509_free( crt ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1291 | return( ret ); |
| 1292 | } |
| 1293 | |
| 1294 | /* |
| 1295 | * subject Name |
| 1296 | */ |
| 1297 | crt->subject_raw.p = p; |
| 1298 | |
| 1299 | if( ( ret = asn1_get_tag( &p, end, &len, |
| 1300 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 1301 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1302 | x509_free( crt ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1303 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1304 | } |
| 1305 | |
| 1306 | if( ( ret = x509_get_name( &p, p + len, &crt->subject ) ) != 0 ) |
| 1307 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1308 | x509_free( crt ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1309 | return( ret ); |
| 1310 | } |
| 1311 | |
| 1312 | crt->subject_raw.len = p - crt->subject_raw.p; |
| 1313 | |
| 1314 | /* |
| 1315 | * SubjectPublicKeyInfo ::= SEQUENCE |
| 1316 | * algorithm AlgorithmIdentifier, |
| 1317 | * subjectPublicKey BIT STRING } |
| 1318 | */ |
| 1319 | if( ( ret = asn1_get_tag( &p, end, &len, |
| 1320 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 1321 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1322 | x509_free( crt ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1323 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1324 | } |
| 1325 | |
| 1326 | if( ( ret = x509_get_pubkey( &p, p + len, &crt->pk_oid, |
| 1327 | &crt->rsa.N, &crt->rsa.E ) ) != 0 ) |
| 1328 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1329 | x509_free( crt ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1330 | return( ret ); |
| 1331 | } |
| 1332 | |
| 1333 | if( ( ret = rsa_check_pubkey( &crt->rsa ) ) != 0 ) |
| 1334 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1335 | x509_free( crt ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1336 | return( ret ); |
| 1337 | } |
| 1338 | |
| 1339 | crt->rsa.len = mpi_size( &crt->rsa.N ); |
| 1340 | |
| 1341 | /* |
| 1342 | * issuerUniqueID [1] IMPLICIT UniqueIdentifier OPTIONAL, |
| 1343 | * -- If present, version shall be v2 or v3 |
| 1344 | * subjectUniqueID [2] IMPLICIT UniqueIdentifier OPTIONAL, |
| 1345 | * -- If present, version shall be v2 or v3 |
| 1346 | * extensions [3] EXPLICIT Extensions OPTIONAL |
| 1347 | * -- If present, version shall be v3 |
| 1348 | */ |
| 1349 | if( crt->version == 2 || crt->version == 3 ) |
| 1350 | { |
| 1351 | ret = x509_get_uid( &p, end, &crt->issuer_id, 1 ); |
| 1352 | if( ret != 0 ) |
| 1353 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1354 | x509_free( crt ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1355 | return( ret ); |
| 1356 | } |
| 1357 | } |
| 1358 | |
| 1359 | if( crt->version == 2 || crt->version == 3 ) |
| 1360 | { |
| 1361 | ret = x509_get_uid( &p, end, &crt->subject_id, 2 ); |
| 1362 | if( ret != 0 ) |
| 1363 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1364 | x509_free( crt ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1365 | return( ret ); |
| 1366 | } |
| 1367 | } |
| 1368 | |
| 1369 | if( crt->version == 3 ) |
| 1370 | { |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 1371 | ret = x509_get_crt_ext( &p, end, crt); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1372 | if( ret != 0 ) |
| 1373 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1374 | x509_free( crt ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1375 | return( ret ); |
| 1376 | } |
| 1377 | } |
| 1378 | |
| 1379 | if( p != end ) |
| 1380 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1381 | x509_free( crt ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1382 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | |
| 1383 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1384 | } |
| 1385 | |
| 1386 | end = crt->raw.p + crt->raw.len; |
| 1387 | |
| 1388 | /* |
| 1389 | * signatureAlgorithm AlgorithmIdentifier, |
| 1390 | * signatureValue BIT STRING |
| 1391 | */ |
| 1392 | if( ( ret = x509_get_alg( &p, end, &crt->sig_oid2 ) ) != 0 ) |
| 1393 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1394 | x509_free( crt ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1395 | return( ret ); |
| 1396 | } |
| 1397 | |
Paul Bakker | 320a4b5 | 2009-03-28 18:52:39 +0000 | [diff] [blame] | 1398 | if( memcmp( crt->sig_oid1.p, crt->sig_oid2.p, crt->sig_oid1.len ) != 0 ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1399 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1400 | x509_free( crt ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1401 | return( POLARSSL_ERR_X509_CERT_SIG_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1402 | } |
| 1403 | |
| 1404 | if( ( ret = x509_get_sig( &p, end, &crt->sig ) ) != 0 ) |
| 1405 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1406 | x509_free( crt ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1407 | return( ret ); |
| 1408 | } |
| 1409 | |
| 1410 | if( p != end ) |
| 1411 | { |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1412 | x509_free( crt ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1413 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | |
| 1414 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1415 | } |
| 1416 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1417 | if( buflen > 0 ) |
Paul Bakker | 320a4b5 | 2009-03-28 18:52:39 +0000 | [diff] [blame] | 1418 | { |
| 1419 | crt->next = (x509_cert *) malloc( sizeof( x509_cert ) ); |
| 1420 | |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1421 | if( crt->next == NULL ) |
| 1422 | { |
Paul Bakker | 320a4b5 | 2009-03-28 18:52:39 +0000 | [diff] [blame] | 1423 | x509_free( crt ); |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1424 | return( 1 ); |
| 1425 | } |
Paul Bakker | 320a4b5 | 2009-03-28 18:52:39 +0000 | [diff] [blame] | 1426 | |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1427 | crt = crt->next; |
| 1428 | memset( crt, 0, sizeof( x509_cert ) ); |
Paul Bakker | 320a4b5 | 2009-03-28 18:52:39 +0000 | [diff] [blame] | 1429 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1430 | return( x509parse_crt( crt, buf, buflen ) ); |
Paul Bakker | 320a4b5 | 2009-03-28 18:52:39 +0000 | [diff] [blame] | 1431 | } |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1432 | |
| 1433 | return( 0 ); |
| 1434 | } |
| 1435 | |
| 1436 | /* |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1437 | * Parse one or more CRLs and add them to the chained list |
| 1438 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 1439 | int x509parse_crl( x509_crl *chain, const unsigned char *buf, int buflen ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1440 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1441 | int ret, len, use_len; |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1442 | unsigned char *p, *end; |
| 1443 | x509_crl *crl; |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1444 | #if defined(POLARSSL_PEM_C) |
| 1445 | pem_context pem; |
| 1446 | #endif |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1447 | |
| 1448 | crl = chain; |
| 1449 | |
| 1450 | /* |
| 1451 | * Check for valid input |
| 1452 | */ |
| 1453 | if( crl == NULL || buf == NULL ) |
| 1454 | return( 1 ); |
| 1455 | |
| 1456 | while( crl->version != 0 && crl->next != NULL ) |
| 1457 | crl = crl->next; |
| 1458 | |
| 1459 | /* |
| 1460 | * Add new CRL on the end of the chain if needed. |
| 1461 | */ |
| 1462 | if ( crl->version != 0 && crl->next == NULL) |
| 1463 | { |
| 1464 | crl->next = (x509_crl *) malloc( sizeof( x509_crl ) ); |
| 1465 | |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1466 | if( crl->next == NULL ) |
| 1467 | { |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1468 | x509_crl_free( crl ); |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1469 | return( 1 ); |
| 1470 | } |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1471 | |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1472 | crl = crl->next; |
| 1473 | memset( crl, 0, sizeof( x509_crl ) ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1474 | } |
| 1475 | |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1476 | #if defined(POLARSSL_PEM_C) |
| 1477 | pem_init( &pem ); |
| 1478 | ret = pem_read_buffer( &pem, |
| 1479 | "-----BEGIN X509 CRL-----", |
| 1480 | "-----END X509 CRL-----", |
| 1481 | buf, NULL, 0, &use_len ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1482 | |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1483 | if( ret == 0 ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1484 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1485 | /* |
| 1486 | * Was PEM encoded |
| 1487 | */ |
| 1488 | buflen -= use_len; |
| 1489 | buf += use_len; |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1490 | |
| 1491 | /* |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1492 | * Steal PEM buffer |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1493 | */ |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1494 | p = pem.buf; |
| 1495 | pem.buf = NULL; |
| 1496 | len = pem.buflen; |
| 1497 | pem_free( &pem ); |
| 1498 | } |
| 1499 | else if( ret != POLARSSL_ERR_PEM_NO_HEADER_PRESENT ) |
| 1500 | { |
| 1501 | pem_free( &pem ); |
| 1502 | return( ret ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1503 | } |
| 1504 | else |
| 1505 | { |
| 1506 | /* |
| 1507 | * nope, copy the raw DER data |
| 1508 | */ |
| 1509 | p = (unsigned char *) malloc( len = buflen ); |
| 1510 | |
| 1511 | if( p == NULL ) |
| 1512 | return( 1 ); |
| 1513 | |
| 1514 | memcpy( p, buf, buflen ); |
| 1515 | |
| 1516 | buflen = 0; |
| 1517 | } |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1518 | #else |
| 1519 | p = (unsigned char *) malloc( len = buflen ); |
| 1520 | |
| 1521 | if( p == NULL ) |
| 1522 | return( 1 ); |
| 1523 | |
| 1524 | memcpy( p, buf, buflen ); |
| 1525 | |
| 1526 | buflen = 0; |
| 1527 | #endif |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1528 | |
| 1529 | crl->raw.p = p; |
| 1530 | crl->raw.len = len; |
| 1531 | end = p + len; |
| 1532 | |
| 1533 | /* |
| 1534 | * CertificateList ::= SEQUENCE { |
| 1535 | * tbsCertList TBSCertList, |
| 1536 | * signatureAlgorithm AlgorithmIdentifier, |
| 1537 | * signatureValue BIT STRING } |
| 1538 | */ |
| 1539 | if( ( ret = asn1_get_tag( &p, end, &len, |
| 1540 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 1541 | { |
| 1542 | x509_crl_free( crl ); |
| 1543 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT ); |
| 1544 | } |
| 1545 | |
| 1546 | if( len != (int) ( end - p ) ) |
| 1547 | { |
| 1548 | x509_crl_free( crl ); |
| 1549 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | |
| 1550 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| 1551 | } |
| 1552 | |
| 1553 | /* |
| 1554 | * TBSCertList ::= SEQUENCE { |
| 1555 | */ |
| 1556 | crl->tbs.p = p; |
| 1557 | |
| 1558 | if( ( ret = asn1_get_tag( &p, end, &len, |
| 1559 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 1560 | { |
| 1561 | x509_crl_free( crl ); |
| 1562 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | ret ); |
| 1563 | } |
| 1564 | |
| 1565 | end = p + len; |
| 1566 | crl->tbs.len = end - crl->tbs.p; |
| 1567 | |
| 1568 | /* |
| 1569 | * Version ::= INTEGER OPTIONAL { v1(0), v2(1) } |
| 1570 | * -- if present, MUST be v2 |
| 1571 | * |
| 1572 | * signature AlgorithmIdentifier |
| 1573 | */ |
| 1574 | if( ( ret = x509_get_version( &p, end, &crl->version ) ) != 0 || |
| 1575 | ( ret = x509_get_alg( &p, end, &crl->sig_oid1 ) ) != 0 ) |
| 1576 | { |
| 1577 | x509_crl_free( crl ); |
| 1578 | return( ret ); |
| 1579 | } |
| 1580 | |
| 1581 | crl->version++; |
| 1582 | |
| 1583 | if( crl->version > 2 ) |
| 1584 | { |
| 1585 | x509_crl_free( crl ); |
| 1586 | return( POLARSSL_ERR_X509_CERT_UNKNOWN_VERSION ); |
| 1587 | } |
| 1588 | |
Paul Bakker | 27d6616 | 2010-03-17 06:56:01 +0000 | [diff] [blame] | 1589 | if( ( ret = x509_get_sig_alg( &crl->sig_oid1, &crl->sig_alg ) ) != 0 ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1590 | { |
| 1591 | x509_crl_free( crl ); |
| 1592 | return( POLARSSL_ERR_X509_CERT_UNKNOWN_SIG_ALG ); |
| 1593 | } |
| 1594 | |
| 1595 | /* |
| 1596 | * issuer Name |
| 1597 | */ |
| 1598 | crl->issuer_raw.p = p; |
| 1599 | |
| 1600 | if( ( ret = asn1_get_tag( &p, end, &len, |
| 1601 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 1602 | { |
| 1603 | x509_crl_free( crl ); |
| 1604 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | ret ); |
| 1605 | } |
| 1606 | |
| 1607 | if( ( ret = x509_get_name( &p, p + len, &crl->issuer ) ) != 0 ) |
| 1608 | { |
| 1609 | x509_crl_free( crl ); |
| 1610 | return( ret ); |
| 1611 | } |
| 1612 | |
| 1613 | crl->issuer_raw.len = p - crl->issuer_raw.p; |
| 1614 | |
| 1615 | /* |
| 1616 | * thisUpdate Time |
| 1617 | * nextUpdate Time OPTIONAL |
| 1618 | */ |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 1619 | if( ( ret = x509_get_time( &p, end, &crl->this_update ) ) != 0 ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1620 | { |
| 1621 | x509_crl_free( crl ); |
| 1622 | return( ret ); |
| 1623 | } |
| 1624 | |
Paul Bakker | 9120018 | 2010-02-18 21:26:15 +0000 | [diff] [blame] | 1625 | if( ( ret = x509_get_time( &p, end, &crl->next_update ) ) != 0 ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1626 | { |
Paul Bakker | 635f4b4 | 2009-07-20 20:34:41 +0000 | [diff] [blame] | 1627 | if ( ret != ( POLARSSL_ERR_X509_CERT_INVALID_DATE | |
Paul Bakker | 9be1937 | 2009-07-27 20:21:53 +0000 | [diff] [blame] | 1628 | POLARSSL_ERR_ASN1_UNEXPECTED_TAG ) && |
| 1629 | ret != ( POLARSSL_ERR_X509_CERT_INVALID_DATE | |
| 1630 | POLARSSL_ERR_ASN1_OUT_OF_DATA ) ) |
Paul Bakker | 635f4b4 | 2009-07-20 20:34:41 +0000 | [diff] [blame] | 1631 | { |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1632 | x509_crl_free( crl ); |
| 1633 | return( ret ); |
| 1634 | } |
| 1635 | } |
| 1636 | |
| 1637 | /* |
| 1638 | * revokedCertificates SEQUENCE OF SEQUENCE { |
| 1639 | * userCertificate CertificateSerialNumber, |
| 1640 | * revocationDate Time, |
| 1641 | * crlEntryExtensions Extensions OPTIONAL |
| 1642 | * -- if present, MUST be v2 |
| 1643 | * } OPTIONAL |
| 1644 | */ |
| 1645 | if( ( ret = x509_get_entries( &p, end, &crl->entry ) ) != 0 ) |
| 1646 | { |
| 1647 | x509_crl_free( crl ); |
| 1648 | return( ret ); |
| 1649 | } |
| 1650 | |
| 1651 | /* |
| 1652 | * crlExtensions EXPLICIT Extensions OPTIONAL |
| 1653 | * -- if present, MUST be v2 |
| 1654 | */ |
| 1655 | if( crl->version == 2 ) |
| 1656 | { |
| 1657 | ret = x509_get_crl_ext( &p, end, &crl->crl_ext ); |
| 1658 | |
| 1659 | if( ret != 0 ) |
| 1660 | { |
| 1661 | x509_crl_free( crl ); |
| 1662 | return( ret ); |
| 1663 | } |
| 1664 | } |
| 1665 | |
| 1666 | if( p != end ) |
| 1667 | { |
| 1668 | x509_crl_free( crl ); |
| 1669 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | |
| 1670 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| 1671 | } |
| 1672 | |
| 1673 | end = crl->raw.p + crl->raw.len; |
| 1674 | |
| 1675 | /* |
| 1676 | * signatureAlgorithm AlgorithmIdentifier, |
| 1677 | * signatureValue BIT STRING |
| 1678 | */ |
| 1679 | if( ( ret = x509_get_alg( &p, end, &crl->sig_oid2 ) ) != 0 ) |
| 1680 | { |
| 1681 | x509_crl_free( crl ); |
| 1682 | return( ret ); |
| 1683 | } |
| 1684 | |
| 1685 | if( memcmp( crl->sig_oid1.p, crl->sig_oid2.p, crl->sig_oid1.len ) != 0 ) |
| 1686 | { |
| 1687 | x509_crl_free( crl ); |
| 1688 | return( POLARSSL_ERR_X509_CERT_SIG_MISMATCH ); |
| 1689 | } |
| 1690 | |
| 1691 | if( ( ret = x509_get_sig( &p, end, &crl->sig ) ) != 0 ) |
| 1692 | { |
| 1693 | x509_crl_free( crl ); |
| 1694 | return( ret ); |
| 1695 | } |
| 1696 | |
| 1697 | if( p != end ) |
| 1698 | { |
| 1699 | x509_crl_free( crl ); |
| 1700 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | |
| 1701 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| 1702 | } |
| 1703 | |
| 1704 | if( buflen > 0 ) |
| 1705 | { |
| 1706 | crl->next = (x509_crl *) malloc( sizeof( x509_crl ) ); |
| 1707 | |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1708 | if( crl->next == NULL ) |
| 1709 | { |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1710 | x509_crl_free( crl ); |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1711 | return( 1 ); |
| 1712 | } |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1713 | |
Paul Bakker | 7d06ad2 | 2009-05-02 15:53:56 +0000 | [diff] [blame] | 1714 | crl = crl->next; |
| 1715 | memset( crl, 0, sizeof( x509_crl ) ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1716 | |
| 1717 | return( x509parse_crl( crl, buf, buflen ) ); |
| 1718 | } |
| 1719 | |
| 1720 | return( 0 ); |
| 1721 | } |
| 1722 | |
| 1723 | /* |
Paul Bakker | 2b245eb | 2009-04-19 18:44:26 +0000 | [diff] [blame] | 1724 | * Load all data from a file into a given buffer. |
| 1725 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 1726 | int load_file( const char *path, unsigned char **buf, size_t *n ) |
Paul Bakker | 2b245eb | 2009-04-19 18:44:26 +0000 | [diff] [blame] | 1727 | { |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1728 | FILE *f; |
Paul Bakker | 2b245eb | 2009-04-19 18:44:26 +0000 | [diff] [blame] | 1729 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1730 | if( ( f = fopen( path, "rb" ) ) == NULL ) |
| 1731 | return( 1 ); |
Paul Bakker | 2b245eb | 2009-04-19 18:44:26 +0000 | [diff] [blame] | 1732 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1733 | fseek( f, 0, SEEK_END ); |
| 1734 | *n = (size_t) ftell( f ); |
| 1735 | fseek( f, 0, SEEK_SET ); |
Paul Bakker | 2b245eb | 2009-04-19 18:44:26 +0000 | [diff] [blame] | 1736 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1737 | if( ( *buf = (unsigned char *) malloc( *n + 1 ) ) == NULL ) |
| 1738 | return( 1 ); |
Paul Bakker | 2b245eb | 2009-04-19 18:44:26 +0000 | [diff] [blame] | 1739 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1740 | if( fread( *buf, 1, *n, f ) != *n ) |
| 1741 | { |
| 1742 | fclose( f ); |
| 1743 | free( *buf ); |
| 1744 | return( 1 ); |
| 1745 | } |
Paul Bakker | 2b245eb | 2009-04-19 18:44:26 +0000 | [diff] [blame] | 1746 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1747 | fclose( f ); |
Paul Bakker | 2b245eb | 2009-04-19 18:44:26 +0000 | [diff] [blame] | 1748 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1749 | (*buf)[*n] = '\0'; |
Paul Bakker | 2b245eb | 2009-04-19 18:44:26 +0000 | [diff] [blame] | 1750 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1751 | return( 0 ); |
Paul Bakker | 2b245eb | 2009-04-19 18:44:26 +0000 | [diff] [blame] | 1752 | } |
| 1753 | |
| 1754 | /* |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1755 | * Load one or more certificates and add them to the chained list |
| 1756 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 1757 | int x509parse_crtfile( x509_cert *chain, const char *path ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1758 | { |
| 1759 | int ret; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1760 | size_t n; |
| 1761 | unsigned char *buf; |
| 1762 | |
Paul Bakker | 2b245eb | 2009-04-19 18:44:26 +0000 | [diff] [blame] | 1763 | if ( load_file( path, &buf, &n ) ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1764 | return( 1 ); |
| 1765 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1766 | ret = x509parse_crt( chain, buf, (int) n ); |
| 1767 | |
| 1768 | memset( buf, 0, n + 1 ); |
| 1769 | free( buf ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1770 | |
| 1771 | return( ret ); |
| 1772 | } |
| 1773 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1774 | /* |
| 1775 | * Load one or more CRLs and add them to the chained list |
| 1776 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 1777 | int x509parse_crlfile( x509_crl *chain, const char *path ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 1778 | { |
| 1779 | int ret; |
| 1780 | size_t n; |
| 1781 | unsigned char *buf; |
| 1782 | |
| 1783 | if ( load_file( path, &buf, &n ) ) |
| 1784 | return( 1 ); |
| 1785 | |
| 1786 | ret = x509parse_crl( chain, buf, (int) n ); |
| 1787 | |
| 1788 | memset( buf, 0, n + 1 ); |
| 1789 | free( buf ); |
| 1790 | |
| 1791 | return( ret ); |
| 1792 | } |
| 1793 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1794 | /* |
| 1795 | * Parse a private RSA key |
| 1796 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 1797 | int x509parse_key( rsa_context *rsa, const unsigned char *key, int keylen, |
| 1798 | const unsigned char *pwd, int pwdlen ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1799 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1800 | int ret, len; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1801 | unsigned char *p, *end; |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1802 | #if defined(POLARSSL_PEM_C) |
| 1803 | pem_context pem; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1804 | |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1805 | pem_init( &pem ); |
| 1806 | ret = pem_read_buffer( &pem, |
| 1807 | "-----BEGIN RSA PRIVATE KEY-----", |
| 1808 | "-----END RSA PRIVATE KEY-----", |
| 1809 | key, pwd, pwdlen, &len ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1810 | |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1811 | if( ret == 0 ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1812 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1813 | /* |
| 1814 | * Was PEM encoded |
| 1815 | */ |
| 1816 | keylen = pem.buflen; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1817 | } |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1818 | else if( ret != POLARSSL_ERR_PEM_NO_HEADER_PRESENT ) |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 1819 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1820 | pem_free( &pem ); |
| 1821 | return( ret ); |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 1822 | } |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1823 | |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1824 | p = ( ret == 0 ) ? pem.buf : (unsigned char *) key; |
| 1825 | #else |
| 1826 | p = (unsigned char *) key; |
| 1827 | #endif |
| 1828 | end = p + keylen; |
| 1829 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1830 | /* |
| 1831 | * RSAPrivateKey ::= SEQUENCE { |
| 1832 | * version Version, |
| 1833 | * modulus INTEGER, -- n |
| 1834 | * publicExponent INTEGER, -- e |
| 1835 | * privateExponent INTEGER, -- d |
| 1836 | * prime1 INTEGER, -- p |
| 1837 | * prime2 INTEGER, -- q |
| 1838 | * exponent1 INTEGER, -- d mod (p-1) |
| 1839 | * exponent2 INTEGER, -- d mod (q-1) |
| 1840 | * coefficient INTEGER, -- (inverse of q) mod p |
| 1841 | * otherPrimeInfos OtherPrimeInfos OPTIONAL |
| 1842 | * } |
| 1843 | */ |
| 1844 | if( ( ret = asn1_get_tag( &p, end, &len, |
| 1845 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 1846 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1847 | #if defined(POLARSSL_PEM_C) |
| 1848 | pem_free( &pem ); |
| 1849 | #endif |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1850 | rsa_free( rsa ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1851 | return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1852 | } |
| 1853 | |
| 1854 | end = p + len; |
| 1855 | |
| 1856 | if( ( ret = asn1_get_int( &p, end, &rsa->ver ) ) != 0 ) |
| 1857 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1858 | #if defined(POLARSSL_PEM_C) |
| 1859 | pem_free( &pem ); |
| 1860 | #endif |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1861 | rsa_free( rsa ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1862 | return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT | ret ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1863 | } |
| 1864 | |
| 1865 | if( rsa->ver != 0 ) |
| 1866 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1867 | #if defined(POLARSSL_PEM_C) |
| 1868 | pem_free( &pem ); |
| 1869 | #endif |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1870 | rsa_free( rsa ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1871 | return( ret | POLARSSL_ERR_X509_KEY_INVALID_VERSION ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1872 | } |
| 1873 | |
| 1874 | if( ( ret = asn1_get_mpi( &p, end, &rsa->N ) ) != 0 || |
| 1875 | ( ret = asn1_get_mpi( &p, end, &rsa->E ) ) != 0 || |
| 1876 | ( ret = asn1_get_mpi( &p, end, &rsa->D ) ) != 0 || |
| 1877 | ( ret = asn1_get_mpi( &p, end, &rsa->P ) ) != 0 || |
| 1878 | ( ret = asn1_get_mpi( &p, end, &rsa->Q ) ) != 0 || |
| 1879 | ( ret = asn1_get_mpi( &p, end, &rsa->DP ) ) != 0 || |
| 1880 | ( ret = asn1_get_mpi( &p, end, &rsa->DQ ) ) != 0 || |
| 1881 | ( ret = asn1_get_mpi( &p, end, &rsa->QP ) ) != 0 ) |
| 1882 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1883 | #if defined(POLARSSL_PEM_C) |
| 1884 | pem_free( &pem ); |
| 1885 | #endif |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1886 | rsa_free( rsa ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1887 | return( ret | POLARSSL_ERR_X509_KEY_INVALID_FORMAT ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1888 | } |
| 1889 | |
| 1890 | rsa->len = mpi_size( &rsa->N ); |
| 1891 | |
| 1892 | if( p != end ) |
| 1893 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1894 | #if defined(POLARSSL_PEM_C) |
| 1895 | pem_free( &pem ); |
| 1896 | #endif |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1897 | rsa_free( rsa ); |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 1898 | return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT | |
| 1899 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1900 | } |
| 1901 | |
| 1902 | if( ( ret = rsa_check_privkey( rsa ) ) != 0 ) |
| 1903 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1904 | #if defined(POLARSSL_PEM_C) |
| 1905 | pem_free( &pem ); |
| 1906 | #endif |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1907 | rsa_free( rsa ); |
| 1908 | return( ret ); |
| 1909 | } |
| 1910 | |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 1911 | #if defined(POLARSSL_PEM_C) |
| 1912 | pem_free( &pem ); |
| 1913 | #endif |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1914 | |
| 1915 | return( 0 ); |
| 1916 | } |
| 1917 | |
| 1918 | /* |
| 1919 | * Load and parse a private RSA key |
| 1920 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 1921 | int x509parse_keyfile( rsa_context *rsa, const char *path, const char *pwd ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1922 | { |
| 1923 | int ret; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1924 | size_t n; |
| 1925 | unsigned char *buf; |
| 1926 | |
Paul Bakker | 2b245eb | 2009-04-19 18:44:26 +0000 | [diff] [blame] | 1927 | if ( load_file( path, &buf, &n ) ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1928 | return( 1 ); |
| 1929 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1930 | if( pwd == NULL ) |
| 1931 | ret = x509parse_key( rsa, buf, (int) n, NULL, 0 ); |
| 1932 | else |
| 1933 | ret = x509parse_key( rsa, buf, (int) n, |
| 1934 | (unsigned char *) pwd, strlen( pwd ) ); |
| 1935 | |
| 1936 | memset( buf, 0, n + 1 ); |
| 1937 | free( buf ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 1938 | |
| 1939 | return( ret ); |
| 1940 | } |
| 1941 | |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 1942 | /* |
Paul Bakker | 53019ae | 2011-03-25 13:58:48 +0000 | [diff] [blame] | 1943 | * Parse a public RSA key |
| 1944 | */ |
| 1945 | int x509parse_public_key( rsa_context *rsa, const unsigned char *key, int keylen ) |
| 1946 | { |
| 1947 | int ret, len; |
| 1948 | unsigned char *p, *end; |
| 1949 | x509_buf alg_oid; |
| 1950 | #if defined(POLARSSL_PEM_C) |
| 1951 | pem_context pem; |
| 1952 | |
| 1953 | pem_init( &pem ); |
| 1954 | ret = pem_read_buffer( &pem, |
| 1955 | "-----BEGIN PUBLIC KEY-----", |
| 1956 | "-----END PUBLIC KEY-----", |
| 1957 | key, NULL, 0, &len ); |
| 1958 | |
| 1959 | if( ret == 0 ) |
| 1960 | { |
| 1961 | /* |
| 1962 | * Was PEM encoded |
| 1963 | */ |
| 1964 | keylen = pem.buflen; |
| 1965 | } |
| 1966 | else if( ret != POLARSSL_ERR_PEM_NO_HEADER_PRESENT ) |
| 1967 | { |
| 1968 | pem_free( &pem ); |
| 1969 | return( ret ); |
| 1970 | } |
| 1971 | |
| 1972 | p = ( ret == 0 ) ? pem.buf : (unsigned char *) key; |
| 1973 | #else |
| 1974 | p = (unsigned char *) key; |
| 1975 | #endif |
| 1976 | end = p + keylen; |
| 1977 | |
| 1978 | /* |
| 1979 | * PublicKeyInfo ::= SEQUENCE { |
| 1980 | * algorithm AlgorithmIdentifier, |
| 1981 | * PublicKey BIT STRING |
| 1982 | * } |
| 1983 | * |
| 1984 | * AlgorithmIdentifier ::= SEQUENCE { |
| 1985 | * algorithm OBJECT IDENTIFIER, |
| 1986 | * parameters ANY DEFINED BY algorithm OPTIONAL |
| 1987 | * } |
| 1988 | * |
| 1989 | * RSAPublicKey ::= SEQUENCE { |
| 1990 | * modulus INTEGER, -- n |
| 1991 | * publicExponent INTEGER -- e |
| 1992 | * } |
| 1993 | */ |
| 1994 | |
| 1995 | if( ( ret = asn1_get_tag( &p, end, &len, |
| 1996 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 1997 | { |
| 1998 | #if defined(POLARSSL_PEM_C) |
| 1999 | pem_free( &pem ); |
| 2000 | #endif |
| 2001 | rsa_free( rsa ); |
| 2002 | return( POLARSSL_ERR_X509_CERT_INVALID_FORMAT | ret ); |
| 2003 | } |
| 2004 | |
| 2005 | if( ( ret = x509_get_pubkey( &p, end, &alg_oid, &rsa->N, &rsa->E ) ) != 0 ) |
| 2006 | { |
| 2007 | #if defined(POLARSSL_PEM_C) |
| 2008 | pem_free( &pem ); |
| 2009 | #endif |
| 2010 | rsa_free( rsa ); |
| 2011 | return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT | ret ); |
| 2012 | } |
| 2013 | |
| 2014 | if( ( ret = rsa_check_pubkey( rsa ) ) != 0 ) |
| 2015 | { |
| 2016 | #if defined(POLARSSL_PEM_C) |
| 2017 | pem_free( &pem ); |
| 2018 | #endif |
| 2019 | rsa_free( rsa ); |
| 2020 | return( ret ); |
| 2021 | } |
| 2022 | |
| 2023 | rsa->len = mpi_size( &rsa->N ); |
| 2024 | |
| 2025 | #if defined(POLARSSL_PEM_C) |
| 2026 | pem_free( &pem ); |
| 2027 | #endif |
| 2028 | |
| 2029 | return( 0 ); |
| 2030 | } |
| 2031 | |
| 2032 | /* |
| 2033 | * Load and parse a public RSA key |
| 2034 | */ |
| 2035 | int x509parse_public_keyfile( rsa_context *rsa, const char *path ) |
| 2036 | { |
| 2037 | int ret; |
| 2038 | size_t n; |
| 2039 | unsigned char *buf; |
| 2040 | |
| 2041 | if ( load_file( path, &buf, &n ) ) |
| 2042 | return( 1 ); |
| 2043 | |
| 2044 | ret = x509parse_public_key( rsa, buf, (int) n ); |
| 2045 | |
| 2046 | memset( buf, 0, n + 1 ); |
| 2047 | free( buf ); |
| 2048 | |
| 2049 | return( ret ); |
| 2050 | } |
| 2051 | |
| 2052 | /* |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2053 | * Parse DHM parameters |
| 2054 | */ |
| 2055 | int x509parse_dhm( dhm_context *dhm, const unsigned char *dhmin, int dhminlen ) |
| 2056 | { |
| 2057 | int ret, len; |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2058 | unsigned char *p, *end; |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 2059 | #if defined(POLARSSL_PEM_C) |
| 2060 | pem_context pem; |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2061 | |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 2062 | pem_init( &pem ); |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2063 | |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 2064 | ret = pem_read_buffer( &pem, |
| 2065 | "-----BEGIN DH PARAMETERS-----", |
| 2066 | "-----END DH PARAMETERS-----", |
| 2067 | dhmin, NULL, 0, &dhminlen ); |
| 2068 | |
| 2069 | if( ret == 0 ) |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2070 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 2071 | /* |
| 2072 | * Was PEM encoded |
| 2073 | */ |
| 2074 | dhminlen = pem.buflen; |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2075 | } |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 2076 | else if( ret != POLARSSL_ERR_PEM_NO_HEADER_PRESENT ) |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2077 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 2078 | pem_free( &pem ); |
| 2079 | return( ret ); |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2080 | } |
| 2081 | |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 2082 | p = ( ret == 0 ) ? pem.buf : (unsigned char *) dhmin; |
| 2083 | #else |
| 2084 | p = (unsigned char *) dhmin; |
| 2085 | #endif |
| 2086 | end = p + dhminlen; |
| 2087 | |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2088 | memset( dhm, 0, sizeof( dhm_context ) ); |
| 2089 | |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2090 | /* |
| 2091 | * DHParams ::= SEQUENCE { |
| 2092 | * prime INTEGER, -- P |
| 2093 | * generator INTEGER, -- g |
| 2094 | * } |
| 2095 | */ |
| 2096 | if( ( ret = asn1_get_tag( &p, end, &len, |
| 2097 | ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| 2098 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 2099 | #if defined(POLARSSL_PEM_C) |
| 2100 | pem_free( &pem ); |
| 2101 | #endif |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2102 | return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT | ret ); |
| 2103 | } |
| 2104 | |
| 2105 | end = p + len; |
| 2106 | |
| 2107 | if( ( ret = asn1_get_mpi( &p, end, &dhm->P ) ) != 0 || |
| 2108 | ( ret = asn1_get_mpi( &p, end, &dhm->G ) ) != 0 ) |
| 2109 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 2110 | #if defined(POLARSSL_PEM_C) |
| 2111 | pem_free( &pem ); |
| 2112 | #endif |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2113 | dhm_free( dhm ); |
| 2114 | return( ret | POLARSSL_ERR_X509_KEY_INVALID_FORMAT ); |
| 2115 | } |
| 2116 | |
| 2117 | if( p != end ) |
| 2118 | { |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 2119 | #if defined(POLARSSL_PEM_C) |
| 2120 | pem_free( &pem ); |
| 2121 | #endif |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2122 | dhm_free( dhm ); |
| 2123 | return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT | |
| 2124 | POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| 2125 | } |
| 2126 | |
Paul Bakker | 96743fc | 2011-02-12 14:30:57 +0000 | [diff] [blame] | 2127 | #if defined(POLARSSL_PEM_C) |
| 2128 | pem_free( &pem ); |
| 2129 | #endif |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 2130 | |
| 2131 | return( 0 ); |
| 2132 | } |
| 2133 | |
| 2134 | /* |
| 2135 | * Load and parse a private RSA key |
| 2136 | */ |
| 2137 | int x509parse_dhmfile( dhm_context *dhm, const char *path ) |
| 2138 | { |
| 2139 | int ret; |
| 2140 | size_t n; |
| 2141 | unsigned char *buf; |
| 2142 | |
| 2143 | if ( load_file( path, &buf, &n ) ) |
| 2144 | return( 1 ); |
| 2145 | |
| 2146 | ret = x509parse_dhm( dhm, buf, (int) n); |
| 2147 | |
| 2148 | memset( buf, 0, n + 1 ); |
| 2149 | free( buf ); |
| 2150 | |
| 2151 | return( ret ); |
| 2152 | } |
| 2153 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2154 | #if defined _MSC_VER && !defined snprintf |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2155 | #include <stdarg.h> |
| 2156 | |
| 2157 | #if !defined vsnprintf |
| 2158 | #define vsnprintf _vsnprintf |
| 2159 | #endif // vsnprintf |
| 2160 | |
| 2161 | /* |
| 2162 | * Windows _snprintf and _vsnprintf are not compatible to linux versions. |
| 2163 | * Result value is not size of buffer needed, but -1 if no fit is possible. |
| 2164 | * |
| 2165 | * This fuction tries to 'fix' this by at least suggesting enlarging the |
| 2166 | * size by 20. |
| 2167 | */ |
| 2168 | int compat_snprintf(char *str, size_t size, const char *format, ...) |
| 2169 | { |
| 2170 | va_list ap; |
| 2171 | int res = -1; |
| 2172 | |
| 2173 | va_start( ap, format ); |
| 2174 | |
| 2175 | res = vsnprintf( str, size, format, ap ); |
| 2176 | |
| 2177 | va_end( ap ); |
| 2178 | |
| 2179 | // No quick fix possible |
| 2180 | if ( res < 0 ) |
| 2181 | return( size + 20 ); |
| 2182 | |
| 2183 | return res; |
| 2184 | } |
| 2185 | |
| 2186 | #define snprintf compat_snprintf |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2187 | #endif |
| 2188 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2189 | #define POLARSSL_ERR_DEBUG_BUF_TOO_SMALL -2 |
| 2190 | |
| 2191 | #define SAFE_SNPRINTF() \ |
| 2192 | { \ |
| 2193 | if( ret == -1 ) \ |
| 2194 | return( -1 ); \ |
| 2195 | \ |
| 2196 | if ( ret > n ) { \ |
| 2197 | p[n - 1] = '\0'; \ |
| 2198 | return POLARSSL_ERR_DEBUG_BUF_TOO_SMALL;\ |
| 2199 | } \ |
| 2200 | \ |
| 2201 | n -= ret; \ |
| 2202 | p += ret; \ |
| 2203 | } |
| 2204 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2205 | /* |
| 2206 | * Store the name in printable form into buf; no more |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2207 | * than size characters will be written |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2208 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 2209 | int x509parse_dn_gets( char *buf, size_t size, const x509_name *dn ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2210 | { |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2211 | int i, ret, n; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2212 | unsigned char c; |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 2213 | const x509_name *name; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2214 | char s[128], *p; |
| 2215 | |
| 2216 | memset( s, 0, sizeof( s ) ); |
| 2217 | |
| 2218 | name = dn; |
| 2219 | p = buf; |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2220 | n = size; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2221 | |
| 2222 | while( name != NULL ) |
| 2223 | { |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 2224 | if( name != dn ) |
| 2225 | { |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2226 | ret = snprintf( p, n, ", " ); |
| 2227 | SAFE_SNPRINTF(); |
| 2228 | } |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2229 | |
| 2230 | if( memcmp( name->oid.p, OID_X520, 2 ) == 0 ) |
| 2231 | { |
| 2232 | switch( name->oid.p[2] ) |
| 2233 | { |
| 2234 | case X520_COMMON_NAME: |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2235 | ret = snprintf( p, n, "CN=" ); break; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2236 | |
| 2237 | case X520_COUNTRY: |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2238 | ret = snprintf( p, n, "C=" ); break; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2239 | |
| 2240 | case X520_LOCALITY: |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2241 | ret = snprintf( p, n, "L=" ); break; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2242 | |
| 2243 | case X520_STATE: |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2244 | ret = snprintf( p, n, "ST=" ); break; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2245 | |
| 2246 | case X520_ORGANIZATION: |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2247 | ret = snprintf( p, n, "O=" ); break; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2248 | |
| 2249 | case X520_ORG_UNIT: |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2250 | ret = snprintf( p, n, "OU=" ); break; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2251 | |
| 2252 | default: |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2253 | ret = snprintf( p, n, "0x%02X=", |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2254 | name->oid.p[2] ); |
| 2255 | break; |
| 2256 | } |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2257 | SAFE_SNPRINTF(); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2258 | } |
| 2259 | else if( memcmp( name->oid.p, OID_PKCS9, 8 ) == 0 ) |
| 2260 | { |
| 2261 | switch( name->oid.p[8] ) |
| 2262 | { |
| 2263 | case PKCS9_EMAIL: |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2264 | ret = snprintf( p, n, "emailAddress=" ); break; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2265 | |
| 2266 | default: |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2267 | ret = snprintf( p, n, "0x%02X=", |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2268 | name->oid.p[8] ); |
| 2269 | break; |
| 2270 | } |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2271 | SAFE_SNPRINTF(); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2272 | } |
| 2273 | else |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 2274 | { |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2275 | ret = snprintf( p, n, "\?\?=" ); |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 2276 | SAFE_SNPRINTF(); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2277 | } |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2278 | |
| 2279 | for( i = 0; i < name->val.len; i++ ) |
| 2280 | { |
| 2281 | if( i >= (int) sizeof( s ) - 1 ) |
| 2282 | break; |
| 2283 | |
| 2284 | c = name->val.p[i]; |
| 2285 | if( c < 32 || c == 127 || ( c > 128 && c < 160 ) ) |
| 2286 | s[i] = '?'; |
| 2287 | else s[i] = c; |
| 2288 | } |
| 2289 | s[i] = '\0'; |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2290 | ret = snprintf( p, n, "%s", s ); |
| 2291 | SAFE_SNPRINTF(); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2292 | name = name->next; |
| 2293 | } |
| 2294 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2295 | return( size - n ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2296 | } |
| 2297 | |
| 2298 | /* |
Paul Bakker | dd47699 | 2011-01-16 21:34:59 +0000 | [diff] [blame] | 2299 | * Store the serial in printable form into buf; no more |
| 2300 | * than size characters will be written |
| 2301 | */ |
| 2302 | int x509parse_serial_gets( char *buf, size_t size, const x509_buf *serial ) |
| 2303 | { |
| 2304 | int i, ret, nr, n; |
| 2305 | char *p; |
| 2306 | |
| 2307 | p = buf; |
| 2308 | n = size; |
| 2309 | |
| 2310 | nr = ( serial->len <= 32 ) |
| 2311 | ? serial->len : 32; |
| 2312 | |
| 2313 | for( i = 0; i < nr; i++ ) |
| 2314 | { |
| 2315 | ret = snprintf( p, n, "%02X%s", |
| 2316 | serial->p[i], ( i < nr - 1 ) ? ":" : "" ); |
| 2317 | SAFE_SNPRINTF(); |
| 2318 | } |
| 2319 | |
| 2320 | return( size - n ); |
| 2321 | } |
| 2322 | |
| 2323 | /* |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2324 | * Return an informational string about the certificate. |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2325 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 2326 | int x509parse_cert_info( char *buf, size_t size, const char *prefix, |
| 2327 | const x509_cert *crt ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2328 | { |
Paul Bakker | dd47699 | 2011-01-16 21:34:59 +0000 | [diff] [blame] | 2329 | int n, ret; |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2330 | char *p; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2331 | |
| 2332 | p = buf; |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2333 | n = size; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2334 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2335 | ret = snprintf( p, n, "%scert. version : %d\n", |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2336 | prefix, crt->version ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2337 | SAFE_SNPRINTF(); |
| 2338 | ret = snprintf( p, n, "%sserial number : ", |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2339 | prefix ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2340 | SAFE_SNPRINTF(); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2341 | |
Paul Bakker | dd47699 | 2011-01-16 21:34:59 +0000 | [diff] [blame] | 2342 | ret = x509parse_serial_gets( p, n, &crt->serial); |
| 2343 | SAFE_SNPRINTF(); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2344 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2345 | ret = snprintf( p, n, "\n%sissuer name : ", prefix ); |
| 2346 | SAFE_SNPRINTF(); |
| 2347 | ret = x509parse_dn_gets( p, n, &crt->issuer ); |
| 2348 | SAFE_SNPRINTF(); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2349 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2350 | ret = snprintf( p, n, "\n%ssubject name : ", prefix ); |
| 2351 | SAFE_SNPRINTF(); |
| 2352 | ret = x509parse_dn_gets( p, n, &crt->subject ); |
| 2353 | SAFE_SNPRINTF(); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2354 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2355 | ret = snprintf( p, n, "\n%sissued on : " \ |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2356 | "%04d-%02d-%02d %02d:%02d:%02d", prefix, |
| 2357 | crt->valid_from.year, crt->valid_from.mon, |
| 2358 | crt->valid_from.day, crt->valid_from.hour, |
| 2359 | crt->valid_from.min, crt->valid_from.sec ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2360 | SAFE_SNPRINTF(); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2361 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2362 | ret = snprintf( p, n, "\n%sexpires on : " \ |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2363 | "%04d-%02d-%02d %02d:%02d:%02d", prefix, |
| 2364 | crt->valid_to.year, crt->valid_to.mon, |
| 2365 | crt->valid_to.day, crt->valid_to.hour, |
| 2366 | crt->valid_to.min, crt->valid_to.sec ); |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2367 | SAFE_SNPRINTF(); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2368 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2369 | ret = snprintf( p, n, "\n%ssigned using : RSA+", prefix ); |
| 2370 | SAFE_SNPRINTF(); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2371 | |
Paul Bakker | 27d6616 | 2010-03-17 06:56:01 +0000 | [diff] [blame] | 2372 | switch( crt->sig_alg ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2373 | { |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2374 | case SIG_RSA_MD2 : ret = snprintf( p, n, "MD2" ); break; |
| 2375 | case SIG_RSA_MD4 : ret = snprintf( p, n, "MD4" ); break; |
| 2376 | case SIG_RSA_MD5 : ret = snprintf( p, n, "MD5" ); break; |
| 2377 | case SIG_RSA_SHA1 : ret = snprintf( p, n, "SHA1" ); break; |
| 2378 | case SIG_RSA_SHA224 : ret = snprintf( p, n, "SHA224" ); break; |
| 2379 | case SIG_RSA_SHA256 : ret = snprintf( p, n, "SHA256" ); break; |
| 2380 | case SIG_RSA_SHA384 : ret = snprintf( p, n, "SHA384" ); break; |
| 2381 | case SIG_RSA_SHA512 : ret = snprintf( p, n, "SHA512" ); break; |
| 2382 | default: ret = snprintf( p, n, "???" ); break; |
| 2383 | } |
| 2384 | SAFE_SNPRINTF(); |
| 2385 | |
| 2386 | ret = snprintf( p, n, "\n%sRSA key size : %d bits\n", prefix, |
| 2387 | crt->rsa.N.n * (int) sizeof( unsigned long ) * 8 ); |
| 2388 | SAFE_SNPRINTF(); |
| 2389 | |
| 2390 | return( size - n ); |
| 2391 | } |
| 2392 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 2393 | /* Compare a given OID string with an OID x509_buf * */ |
| 2394 | #define OID_CMP(oid_str, oid_buf) \ |
| 2395 | ( ( OID_SIZE(oid_str) == (oid_buf)->len ) && \ |
| 2396 | memcmp( (oid_str), (oid_buf)->p, (oid_buf)->len) == 0) |
| 2397 | |
| 2398 | /* |
| 2399 | * Return an informational string describing the given OID |
| 2400 | */ |
| 2401 | const char *x509_oid_get_description( x509_buf *oid ) |
| 2402 | { |
| 2403 | if ( oid == NULL ) |
| 2404 | return ( NULL ); |
| 2405 | |
| 2406 | else if( OID_CMP( OID_SERVER_AUTH, oid ) ) |
| 2407 | return( STRING_SERVER_AUTH ); |
| 2408 | |
| 2409 | else if( OID_CMP( OID_CLIENT_AUTH, oid ) ) |
| 2410 | return( STRING_CLIENT_AUTH ); |
| 2411 | |
| 2412 | else if( OID_CMP( OID_CODE_SIGNING, oid ) ) |
| 2413 | return( STRING_CODE_SIGNING ); |
| 2414 | |
| 2415 | else if( OID_CMP( OID_EMAIL_PROTECTION, oid ) ) |
| 2416 | return( STRING_EMAIL_PROTECTION ); |
| 2417 | |
| 2418 | else if( OID_CMP( OID_TIME_STAMPING, oid ) ) |
| 2419 | return( STRING_TIME_STAMPING ); |
| 2420 | |
| 2421 | else if( OID_CMP( OID_OCSP_SIGNING, oid ) ) |
| 2422 | return( STRING_OCSP_SIGNING ); |
| 2423 | |
| 2424 | return( NULL ); |
| 2425 | } |
| 2426 | |
| 2427 | /* Return the x.y.z.... style numeric string for the given OID */ |
| 2428 | int x509_oid_get_numeric_string( char *buf, size_t size, x509_buf *oid ) |
| 2429 | { |
| 2430 | int ret, n, i; |
| 2431 | unsigned int value; |
| 2432 | char *p; |
| 2433 | |
| 2434 | p = buf; |
| 2435 | n = size; |
| 2436 | |
| 2437 | /* First byte contains first two dots */ |
| 2438 | if( oid->len > 0 ) |
| 2439 | { |
| 2440 | ret = snprintf( p, n, "%d.%d", oid->p[0]/40, oid->p[0]%40 ); |
| 2441 | SAFE_SNPRINTF(); |
| 2442 | } |
| 2443 | |
| 2444 | /* TODO: value can overflow in value. */ |
| 2445 | value = 0; |
| 2446 | for( i=1; i < oid->len; i++ ) |
| 2447 | { |
| 2448 | value <<= 7; |
| 2449 | value += oid->p[i] & 0x7F; |
| 2450 | |
| 2451 | if( !( oid->p[i] & 0x80 ) ) |
| 2452 | { |
| 2453 | /* Last byte */ |
| 2454 | ret = snprintf( p, n, ".%d", value ); |
| 2455 | SAFE_SNPRINTF(); |
| 2456 | value = 0; |
| 2457 | } |
| 2458 | } |
| 2459 | |
| 2460 | return( size - n ); |
| 2461 | } |
| 2462 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2463 | /* |
| 2464 | * Return an informational string about the CRL. |
| 2465 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 2466 | int x509parse_crl_info( char *buf, size_t size, const char *prefix, |
| 2467 | const x509_crl *crl ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2468 | { |
| 2469 | int i, n, nr, ret; |
| 2470 | char *p; |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 2471 | const x509_crl_entry *entry; |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2472 | |
| 2473 | p = buf; |
| 2474 | n = size; |
| 2475 | |
| 2476 | ret = snprintf( p, n, "%sCRL version : %d", |
| 2477 | prefix, crl->version ); |
| 2478 | SAFE_SNPRINTF(); |
| 2479 | |
| 2480 | ret = snprintf( p, n, "\n%sissuer name : ", prefix ); |
| 2481 | SAFE_SNPRINTF(); |
| 2482 | ret = x509parse_dn_gets( p, n, &crl->issuer ); |
| 2483 | SAFE_SNPRINTF(); |
| 2484 | |
| 2485 | ret = snprintf( p, n, "\n%sthis update : " \ |
| 2486 | "%04d-%02d-%02d %02d:%02d:%02d", prefix, |
| 2487 | crl->this_update.year, crl->this_update.mon, |
| 2488 | crl->this_update.day, crl->this_update.hour, |
| 2489 | crl->this_update.min, crl->this_update.sec ); |
| 2490 | SAFE_SNPRINTF(); |
| 2491 | |
| 2492 | ret = snprintf( p, n, "\n%snext update : " \ |
| 2493 | "%04d-%02d-%02d %02d:%02d:%02d", prefix, |
| 2494 | crl->next_update.year, crl->next_update.mon, |
| 2495 | crl->next_update.day, crl->next_update.hour, |
| 2496 | crl->next_update.min, crl->next_update.sec ); |
| 2497 | SAFE_SNPRINTF(); |
| 2498 | |
| 2499 | entry = &crl->entry; |
| 2500 | |
| 2501 | ret = snprintf( p, n, "\n%sRevoked certificates:", |
| 2502 | prefix ); |
| 2503 | SAFE_SNPRINTF(); |
| 2504 | |
Paul Bakker | 9be1937 | 2009-07-27 20:21:53 +0000 | [diff] [blame] | 2505 | while( entry != NULL && entry->raw.len != 0 ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2506 | { |
| 2507 | ret = snprintf( p, n, "\n%sserial number: ", |
| 2508 | prefix ); |
| 2509 | SAFE_SNPRINTF(); |
| 2510 | |
| 2511 | nr = ( entry->serial.len <= 32 ) |
| 2512 | ? entry->serial.len : 32; |
| 2513 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 2514 | for( i = 0; i < nr; i++ ) |
| 2515 | { |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2516 | ret = snprintf( p, n, "%02X%s", |
| 2517 | entry->serial.p[i], ( i < nr - 1 ) ? ":" : "" ); |
| 2518 | SAFE_SNPRINTF(); |
| 2519 | } |
| 2520 | |
| 2521 | ret = snprintf( p, n, " revocation date: " \ |
| 2522 | "%04d-%02d-%02d %02d:%02d:%02d", |
| 2523 | entry->revocation_date.year, entry->revocation_date.mon, |
| 2524 | entry->revocation_date.day, entry->revocation_date.hour, |
| 2525 | entry->revocation_date.min, entry->revocation_date.sec ); |
| 2526 | SAFE_SNPRINTF(); |
| 2527 | |
| 2528 | entry = entry->next; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2529 | } |
| 2530 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2531 | ret = snprintf( p, n, "\n%ssigned using : RSA+", prefix ); |
| 2532 | SAFE_SNPRINTF(); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2533 | |
Paul Bakker | 27d6616 | 2010-03-17 06:56:01 +0000 | [diff] [blame] | 2534 | switch( crl->sig_alg ) |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2535 | { |
| 2536 | case SIG_RSA_MD2 : ret = snprintf( p, n, "MD2" ); break; |
| 2537 | case SIG_RSA_MD4 : ret = snprintf( p, n, "MD4" ); break; |
| 2538 | case SIG_RSA_MD5 : ret = snprintf( p, n, "MD5" ); break; |
| 2539 | case SIG_RSA_SHA1 : ret = snprintf( p, n, "SHA1" ); break; |
| 2540 | case SIG_RSA_SHA224 : ret = snprintf( p, n, "SHA224" ); break; |
| 2541 | case SIG_RSA_SHA256 : ret = snprintf( p, n, "SHA256" ); break; |
| 2542 | case SIG_RSA_SHA384 : ret = snprintf( p, n, "SHA384" ); break; |
| 2543 | case SIG_RSA_SHA512 : ret = snprintf( p, n, "SHA512" ); break; |
| 2544 | default: ret = snprintf( p, n, "???" ); break; |
| 2545 | } |
| 2546 | SAFE_SNPRINTF(); |
| 2547 | |
Paul Bakker | 1e27bb2 | 2009-07-19 20:25:25 +0000 | [diff] [blame] | 2548 | ret = snprintf( p, n, "\n" ); |
| 2549 | SAFE_SNPRINTF(); |
| 2550 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2551 | return( size - n ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2552 | } |
| 2553 | |
| 2554 | /* |
Paul Bakker | 40ea7de | 2009-05-03 10:18:48 +0000 | [diff] [blame] | 2555 | * Return 0 if the x509_time is still valid, or 1 otherwise. |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2556 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 2557 | int x509parse_time_expired( const x509_time *to ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2558 | { |
| 2559 | struct tm *lt; |
| 2560 | time_t tt; |
| 2561 | |
| 2562 | tt = time( NULL ); |
| 2563 | lt = localtime( &tt ); |
| 2564 | |
Paul Bakker | 40ea7de | 2009-05-03 10:18:48 +0000 | [diff] [blame] | 2565 | if( lt->tm_year > to->year - 1900 ) |
| 2566 | return( 1 ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2567 | |
Paul Bakker | 40ea7de | 2009-05-03 10:18:48 +0000 | [diff] [blame] | 2568 | if( lt->tm_year == to->year - 1900 && |
| 2569 | lt->tm_mon > to->mon - 1 ) |
| 2570 | return( 1 ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2571 | |
Paul Bakker | 40ea7de | 2009-05-03 10:18:48 +0000 | [diff] [blame] | 2572 | if( lt->tm_year == to->year - 1900 && |
| 2573 | lt->tm_mon == to->mon - 1 && |
| 2574 | lt->tm_mday > to->day ) |
| 2575 | return( 1 ); |
| 2576 | |
Paul Bakker | b619499 | 2011-01-16 21:40:22 +0000 | [diff] [blame] | 2577 | if( lt->tm_year == to->year - 1900 && |
| 2578 | lt->tm_mon == to->mon - 1 && |
| 2579 | lt->tm_mday == to->day && |
| 2580 | lt->tm_hour > to->hour - 1) |
| 2581 | return( 1 ); |
| 2582 | |
| 2583 | if( lt->tm_year == to->year - 1900 && |
| 2584 | lt->tm_mon == to->mon - 1 && |
| 2585 | lt->tm_mday == to->day && |
| 2586 | lt->tm_hour == to->hour - 1 && |
| 2587 | lt->tm_min > to->min - 1 ) |
| 2588 | return( 1 ); |
| 2589 | |
| 2590 | if( lt->tm_year == to->year - 1900 && |
| 2591 | lt->tm_mon == to->mon - 1 && |
| 2592 | lt->tm_mday == to->day && |
| 2593 | lt->tm_hour == to->hour - 1 && |
| 2594 | lt->tm_min == to->min - 1 && |
| 2595 | lt->tm_sec > to->sec - 1 ) |
| 2596 | return( 1 ); |
| 2597 | |
Paul Bakker | 40ea7de | 2009-05-03 10:18:48 +0000 | [diff] [blame] | 2598 | return( 0 ); |
| 2599 | } |
| 2600 | |
| 2601 | /* |
| 2602 | * Return 1 if the certificate is revoked, or 0 otherwise. |
| 2603 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 2604 | int x509parse_revoked( const x509_cert *crt, const x509_crl *crl ) |
Paul Bakker | 40ea7de | 2009-05-03 10:18:48 +0000 | [diff] [blame] | 2605 | { |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 2606 | const x509_crl_entry *cur = &crl->entry; |
Paul Bakker | 40ea7de | 2009-05-03 10:18:48 +0000 | [diff] [blame] | 2607 | |
| 2608 | while( cur != NULL && cur->serial.len != 0 ) |
| 2609 | { |
Paul Bakker | a056efc | 2011-01-16 21:38:35 +0000 | [diff] [blame] | 2610 | if( crt->serial.len == cur->serial.len && |
| 2611 | memcmp( crt->serial.p, cur->serial.p, crt->serial.len ) == 0 ) |
Paul Bakker | 40ea7de | 2009-05-03 10:18:48 +0000 | [diff] [blame] | 2612 | { |
| 2613 | if( x509parse_time_expired( &cur->revocation_date ) ) |
| 2614 | return( 1 ); |
| 2615 | } |
| 2616 | |
| 2617 | cur = cur->next; |
| 2618 | } |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2619 | |
| 2620 | return( 0 ); |
| 2621 | } |
| 2622 | |
Paul Bakker | de4d2ea | 2009-10-03 19:58:52 +0000 | [diff] [blame] | 2623 | /* |
| 2624 | * Wrapper for x509 hashes. |
| 2625 | * |
Paul Bakker | 0f5f72e | 2011-01-18 14:58:55 +0000 | [diff] [blame] | 2626 | * \param out Buffer to receive the hash (Should be at least 64 bytes) |
Paul Bakker | de4d2ea | 2009-10-03 19:58:52 +0000 | [diff] [blame] | 2627 | */ |
Paul Bakker | ff60ee6 | 2010-03-16 21:09:09 +0000 | [diff] [blame] | 2628 | static void x509_hash( const unsigned char *in, int len, int alg, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2629 | unsigned char *out ) |
| 2630 | { |
| 2631 | switch( alg ) |
| 2632 | { |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 2633 | #if defined(POLARSSL_MD2_C) |
Paul Bakker | 4593aea | 2009-02-09 22:32:35 +0000 | [diff] [blame] | 2634 | case SIG_RSA_MD2 : md2( in, len, out ); break; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2635 | #endif |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 2636 | #if defined(POLARSSL_MD4_C) |
Paul Bakker | 4593aea | 2009-02-09 22:32:35 +0000 | [diff] [blame] | 2637 | case SIG_RSA_MD4 : md4( in, len, out ); break; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2638 | #endif |
Paul Bakker | de4d2ea | 2009-10-03 19:58:52 +0000 | [diff] [blame] | 2639 | #if defined(POLARSSL_MD5_C) |
Paul Bakker | 4593aea | 2009-02-09 22:32:35 +0000 | [diff] [blame] | 2640 | case SIG_RSA_MD5 : md5( in, len, out ); break; |
Paul Bakker | de4d2ea | 2009-10-03 19:58:52 +0000 | [diff] [blame] | 2641 | #endif |
| 2642 | #if defined(POLARSSL_SHA1_C) |
Paul Bakker | 4593aea | 2009-02-09 22:32:35 +0000 | [diff] [blame] | 2643 | case SIG_RSA_SHA1 : sha1( in, len, out ); break; |
Paul Bakker | de4d2ea | 2009-10-03 19:58:52 +0000 | [diff] [blame] | 2644 | #endif |
Paul Bakker | 4593aea | 2009-02-09 22:32:35 +0000 | [diff] [blame] | 2645 | #if defined(POLARSSL_SHA2_C) |
| 2646 | case SIG_RSA_SHA224 : sha2( in, len, out, 1 ); break; |
| 2647 | case SIG_RSA_SHA256 : sha2( in, len, out, 0 ); break; |
| 2648 | #endif |
Paul Bakker | fe1aea7 | 2009-10-03 20:09:14 +0000 | [diff] [blame] | 2649 | #if defined(POLARSSL_SHA4_C) |
Paul Bakker | 4593aea | 2009-02-09 22:32:35 +0000 | [diff] [blame] | 2650 | case SIG_RSA_SHA384 : sha4( in, len, out, 1 ); break; |
| 2651 | case SIG_RSA_SHA512 : sha4( in, len, out, 0 ); break; |
| 2652 | #endif |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2653 | default: |
Paul Bakker | de4d2ea | 2009-10-03 19:58:52 +0000 | [diff] [blame] | 2654 | memset( out, '\xFF', 64 ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2655 | break; |
| 2656 | } |
| 2657 | } |
| 2658 | |
| 2659 | /* |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2660 | * Check that the given certificate is valid accoring to the CRL. |
| 2661 | */ |
| 2662 | static int x509parse_verifycrl(x509_cert *crt, x509_cert *ca, |
| 2663 | x509_crl *crl_list) |
| 2664 | { |
| 2665 | int flags = 0; |
| 2666 | int hash_id; |
| 2667 | unsigned char hash[64]; |
| 2668 | |
| 2669 | /* |
| 2670 | * TODO: What happens if no CRL is present? |
| 2671 | * Suggestion: Revocation state should be unknown if no CRL is present. |
| 2672 | * For backwards compatibility this is not yet implemented. |
| 2673 | */ |
| 2674 | |
| 2675 | while( ca != NULL && crl_list != NULL && crl_list->version != 0 ) |
| 2676 | { |
| 2677 | if( crl_list->issuer_raw.len != ca->subject_raw.len || |
| 2678 | memcmp( crl_list->issuer_raw.p, ca->subject_raw.p, |
| 2679 | crl_list->issuer_raw.len ) != 0 ) |
| 2680 | { |
| 2681 | crl_list = crl_list->next; |
| 2682 | continue; |
| 2683 | } |
| 2684 | |
| 2685 | /* |
| 2686 | * Check if CRL is correctly signed by the trusted CA |
| 2687 | */ |
| 2688 | hash_id = crl_list->sig_alg; |
| 2689 | |
| 2690 | x509_hash( crl_list->tbs.p, crl_list->tbs.len, hash_id, hash ); |
| 2691 | |
| 2692 | if( !rsa_pkcs1_verify( &ca->rsa, RSA_PUBLIC, hash_id, |
| 2693 | 0, hash, crl_list->sig.p ) == 0 ) |
| 2694 | { |
| 2695 | /* |
| 2696 | * CRL is not trusted |
| 2697 | */ |
| 2698 | flags |= BADCRL_NOT_TRUSTED; |
| 2699 | break; |
| 2700 | } |
| 2701 | |
| 2702 | /* |
| 2703 | * Check for validity of CRL (Do not drop out) |
| 2704 | */ |
| 2705 | if( x509parse_time_expired( &crl_list->next_update ) ) |
| 2706 | flags |= BADCRL_EXPIRED; |
| 2707 | |
| 2708 | /* |
| 2709 | * Check if certificate is revoked |
| 2710 | */ |
| 2711 | if( x509parse_revoked(crt, crl_list) ) |
| 2712 | { |
| 2713 | flags |= BADCERT_REVOKED; |
| 2714 | break; |
| 2715 | } |
| 2716 | |
| 2717 | crl_list = crl_list->next; |
| 2718 | } |
| 2719 | return flags; |
| 2720 | } |
| 2721 | |
| 2722 | /* |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2723 | * Verify the certificate validity |
| 2724 | */ |
| 2725 | int x509parse_verify( x509_cert *crt, |
| 2726 | x509_cert *trust_ca, |
Paul Bakker | 40ea7de | 2009-05-03 10:18:48 +0000 | [diff] [blame] | 2727 | x509_crl *ca_crl, |
Paul Bakker | b63b0af | 2011-01-13 17:54:59 +0000 | [diff] [blame] | 2728 | const char *cn, int *flags, |
| 2729 | int (*f_vrfy)(void *, x509_cert *, int, int), |
| 2730 | void *p_vrfy ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2731 | { |
| 2732 | int cn_len; |
| 2733 | int hash_id; |
| 2734 | int pathlen; |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2735 | x509_cert *parent; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2736 | x509_name *name; |
Paul Bakker | 4593aea | 2009-02-09 22:32:35 +0000 | [diff] [blame] | 2737 | unsigned char hash[64]; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2738 | |
Paul Bakker | 40ea7de | 2009-05-03 10:18:48 +0000 | [diff] [blame] | 2739 | *flags = 0; |
| 2740 | |
| 2741 | if( x509parse_time_expired( &crt->valid_to ) ) |
| 2742 | *flags = BADCERT_EXPIRED; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2743 | |
| 2744 | if( cn != NULL ) |
| 2745 | { |
| 2746 | name = &crt->subject; |
| 2747 | cn_len = strlen( cn ); |
| 2748 | |
| 2749 | while( name != NULL ) |
| 2750 | { |
| 2751 | if( memcmp( name->oid.p, OID_CN, 3 ) == 0 && |
| 2752 | memcmp( name->val.p, cn, cn_len ) == 0 && |
| 2753 | name->val.len == cn_len ) |
| 2754 | break; |
| 2755 | |
| 2756 | name = name->next; |
| 2757 | } |
| 2758 | |
| 2759 | if( name == NULL ) |
| 2760 | *flags |= BADCERT_CN_MISMATCH; |
| 2761 | } |
| 2762 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2763 | /* |
| 2764 | * Iterate upwards in the given cert chain, |
| 2765 | * ignoring any upper cert with CA != TRUE. |
| 2766 | */ |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2767 | parent = crt->next; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2768 | |
| 2769 | pathlen = 1; |
| 2770 | |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2771 | while( parent != NULL && parent->version != 0 ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2772 | { |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2773 | if( parent->ca_istrue == 0 || |
| 2774 | crt->issuer_raw.len != parent->subject_raw.len || |
| 2775 | memcmp( crt->issuer_raw.p, parent->subject_raw.p, |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2776 | crt->issuer_raw.len ) != 0 ) |
| 2777 | { |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2778 | parent = parent->next; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2779 | continue; |
| 2780 | } |
| 2781 | |
Paul Bakker | 27d6616 | 2010-03-17 06:56:01 +0000 | [diff] [blame] | 2782 | hash_id = crt->sig_alg; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2783 | |
| 2784 | x509_hash( crt->tbs.p, crt->tbs.len, hash_id, hash ); |
| 2785 | |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2786 | if( rsa_pkcs1_verify( &parent->rsa, RSA_PUBLIC, hash_id, 0, hash, |
| 2787 | crt->sig.p ) != 0 ) |
| 2788 | *flags |= BADCERT_NOT_TRUSTED; |
| 2789 | |
| 2790 | /* Check trusted CA's CRL for the given crt */ |
| 2791 | *flags |= x509parse_verifycrl(crt, parent, ca_crl); |
Paul Bakker | b63b0af | 2011-01-13 17:54:59 +0000 | [diff] [blame] | 2792 | |
| 2793 | /* crt is verified to be a child of the parent cur, call verify callback */ |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 2794 | if( NULL != f_vrfy ) |
| 2795 | { |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2796 | if( f_vrfy( p_vrfy, crt, pathlen - 1, ( *flags == 0 ) ) != 0 ) |
Paul Bakker | b63b0af | 2011-01-13 17:54:59 +0000 | [diff] [blame] | 2797 | return( POLARSSL_ERR_X509_CERT_VERIFY_FAILED ); |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2798 | else |
| 2799 | *flags = 0; |
Paul Bakker | b63b0af | 2011-01-13 17:54:59 +0000 | [diff] [blame] | 2800 | } |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2801 | else if( *flags != 0 ) |
| 2802 | return( POLARSSL_ERR_X509_CERT_VERIFY_FAILED ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2803 | |
| 2804 | pathlen++; |
| 2805 | |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2806 | crt = parent; |
| 2807 | parent = crt->next; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2808 | } |
| 2809 | |
| 2810 | /* |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2811 | * Attempt to validate topmost cert with our CA chain. |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2812 | */ |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2813 | *flags |= BADCERT_NOT_TRUSTED; |
| 2814 | |
Paul Bakker | 7c6d4a4 | 2009-03-28 20:35:47 +0000 | [diff] [blame] | 2815 | while( trust_ca != NULL && trust_ca->version != 0 ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2816 | { |
| 2817 | if( crt->issuer_raw.len != trust_ca->subject_raw.len || |
| 2818 | memcmp( crt->issuer_raw.p, trust_ca->subject_raw.p, |
| 2819 | crt->issuer_raw.len ) != 0 ) |
| 2820 | { |
| 2821 | trust_ca = trust_ca->next; |
| 2822 | continue; |
| 2823 | } |
| 2824 | |
| 2825 | if( trust_ca->max_pathlen > 0 && |
| 2826 | trust_ca->max_pathlen < pathlen ) |
| 2827 | break; |
| 2828 | |
Paul Bakker | 27d6616 | 2010-03-17 06:56:01 +0000 | [diff] [blame] | 2829 | hash_id = crt->sig_alg; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2830 | |
| 2831 | x509_hash( crt->tbs.p, crt->tbs.len, hash_id, hash ); |
| 2832 | |
| 2833 | if( rsa_pkcs1_verify( &trust_ca->rsa, RSA_PUBLIC, hash_id, |
| 2834 | 0, hash, crt->sig.p ) == 0 ) |
| 2835 | { |
| 2836 | /* |
| 2837 | * cert. is signed by a trusted CA |
| 2838 | */ |
| 2839 | *flags &= ~BADCERT_NOT_TRUSTED; |
| 2840 | break; |
| 2841 | } |
| 2842 | |
| 2843 | trust_ca = trust_ca->next; |
| 2844 | } |
| 2845 | |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2846 | /* Check trusted CA's CRL for the given crt */ |
| 2847 | *flags |= x509parse_verifycrl( crt, trust_ca, ca_crl ); |
Paul Bakker | b63b0af | 2011-01-13 17:54:59 +0000 | [diff] [blame] | 2848 | |
| 2849 | /* Verification succeeded, call callback on top cert */ |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 2850 | if( NULL != f_vrfy ) |
| 2851 | { |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2852 | if( f_vrfy(p_vrfy, crt, pathlen-1, ( *flags == 0 ) ) != 0 ) |
Paul Bakker | b63b0af | 2011-01-13 17:54:59 +0000 | [diff] [blame] | 2853 | return( POLARSSL_ERR_X509_CERT_VERIFY_FAILED ); |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2854 | else |
| 2855 | *flags = 0; |
Paul Bakker | b63b0af | 2011-01-13 17:54:59 +0000 | [diff] [blame] | 2856 | } |
Paul Bakker | 76fd75a | 2011-01-16 21:12:10 +0000 | [diff] [blame] | 2857 | else if( *flags != 0 ) |
| 2858 | return( POLARSSL_ERR_X509_CERT_VERIFY_FAILED ); |
Paul Bakker | b63b0af | 2011-01-13 17:54:59 +0000 | [diff] [blame] | 2859 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2860 | return( 0 ); |
| 2861 | } |
| 2862 | |
| 2863 | /* |
| 2864 | * Unallocate all certificate data |
| 2865 | */ |
| 2866 | void x509_free( x509_cert *crt ) |
| 2867 | { |
| 2868 | x509_cert *cert_cur = crt; |
| 2869 | x509_cert *cert_prv; |
| 2870 | x509_name *name_cur; |
| 2871 | x509_name *name_prv; |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 2872 | x509_sequence *seq_cur; |
| 2873 | x509_sequence *seq_prv; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2874 | |
| 2875 | if( crt == NULL ) |
| 2876 | return; |
| 2877 | |
| 2878 | do |
| 2879 | { |
| 2880 | rsa_free( &cert_cur->rsa ); |
| 2881 | |
| 2882 | name_cur = cert_cur->issuer.next; |
| 2883 | while( name_cur != NULL ) |
| 2884 | { |
| 2885 | name_prv = name_cur; |
| 2886 | name_cur = name_cur->next; |
| 2887 | memset( name_prv, 0, sizeof( x509_name ) ); |
| 2888 | free( name_prv ); |
| 2889 | } |
| 2890 | |
| 2891 | name_cur = cert_cur->subject.next; |
| 2892 | while( name_cur != NULL ) |
| 2893 | { |
| 2894 | name_prv = name_cur; |
| 2895 | name_cur = name_cur->next; |
| 2896 | memset( name_prv, 0, sizeof( x509_name ) ); |
| 2897 | free( name_prv ); |
| 2898 | } |
| 2899 | |
Paul Bakker | 74111d3 | 2011-01-15 16:57:55 +0000 | [diff] [blame] | 2900 | seq_cur = cert_cur->ext_key_usage.next; |
| 2901 | while( seq_cur != NULL ) |
| 2902 | { |
| 2903 | seq_prv = seq_cur; |
| 2904 | seq_cur = seq_cur->next; |
| 2905 | memset( seq_prv, 0, sizeof( x509_sequence ) ); |
| 2906 | free( seq_prv ); |
| 2907 | } |
| 2908 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2909 | if( cert_cur->raw.p != NULL ) |
| 2910 | { |
| 2911 | memset( cert_cur->raw.p, 0, cert_cur->raw.len ); |
| 2912 | free( cert_cur->raw.p ); |
| 2913 | } |
| 2914 | |
| 2915 | cert_cur = cert_cur->next; |
| 2916 | } |
| 2917 | while( cert_cur != NULL ); |
| 2918 | |
| 2919 | cert_cur = crt; |
| 2920 | do |
| 2921 | { |
| 2922 | cert_prv = cert_cur; |
| 2923 | cert_cur = cert_cur->next; |
| 2924 | |
| 2925 | memset( cert_prv, 0, sizeof( x509_cert ) ); |
| 2926 | if( cert_prv != crt ) |
| 2927 | free( cert_prv ); |
| 2928 | } |
| 2929 | while( cert_cur != NULL ); |
| 2930 | } |
| 2931 | |
Paul Bakker | d98030e | 2009-05-02 15:13:40 +0000 | [diff] [blame] | 2932 | /* |
| 2933 | * Unallocate all CRL data |
| 2934 | */ |
| 2935 | void x509_crl_free( x509_crl *crl ) |
| 2936 | { |
| 2937 | x509_crl *crl_cur = crl; |
| 2938 | x509_crl *crl_prv; |
| 2939 | x509_name *name_cur; |
| 2940 | x509_name *name_prv; |
| 2941 | x509_crl_entry *entry_cur; |
| 2942 | x509_crl_entry *entry_prv; |
| 2943 | |
| 2944 | if( crl == NULL ) |
| 2945 | return; |
| 2946 | |
| 2947 | do |
| 2948 | { |
| 2949 | name_cur = crl_cur->issuer.next; |
| 2950 | while( name_cur != NULL ) |
| 2951 | { |
| 2952 | name_prv = name_cur; |
| 2953 | name_cur = name_cur->next; |
| 2954 | memset( name_prv, 0, sizeof( x509_name ) ); |
| 2955 | free( name_prv ); |
| 2956 | } |
| 2957 | |
| 2958 | entry_cur = crl_cur->entry.next; |
| 2959 | while( entry_cur != NULL ) |
| 2960 | { |
| 2961 | entry_prv = entry_cur; |
| 2962 | entry_cur = entry_cur->next; |
| 2963 | memset( entry_prv, 0, sizeof( x509_crl_entry ) ); |
| 2964 | free( entry_prv ); |
| 2965 | } |
| 2966 | |
| 2967 | if( crl_cur->raw.p != NULL ) |
| 2968 | { |
| 2969 | memset( crl_cur->raw.p, 0, crl_cur->raw.len ); |
| 2970 | free( crl_cur->raw.p ); |
| 2971 | } |
| 2972 | |
| 2973 | crl_cur = crl_cur->next; |
| 2974 | } |
| 2975 | while( crl_cur != NULL ); |
| 2976 | |
| 2977 | crl_cur = crl; |
| 2978 | do |
| 2979 | { |
| 2980 | crl_prv = crl_cur; |
| 2981 | crl_cur = crl_cur->next; |
| 2982 | |
| 2983 | memset( crl_prv, 0, sizeof( x509_crl ) ); |
| 2984 | if( crl_prv != crl ) |
| 2985 | free( crl_prv ); |
| 2986 | } |
| 2987 | while( crl_cur != NULL ); |
| 2988 | } |
| 2989 | |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 2990 | #if defined(POLARSSL_SELF_TEST) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2991 | |
Paul Bakker | 40e4694 | 2009-01-03 21:51:57 +0000 | [diff] [blame] | 2992 | #include "polarssl/certs.h" |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 2993 | |
| 2994 | /* |
| 2995 | * Checkup routine |
| 2996 | */ |
| 2997 | int x509_self_test( int verbose ) |
| 2998 | { |
Paul Bakker | de4d2ea | 2009-10-03 19:58:52 +0000 | [diff] [blame] | 2999 | #if defined(POLARSSL_MD5_C) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 3000 | int ret, i, j; |
| 3001 | x509_cert cacert; |
| 3002 | x509_cert clicert; |
| 3003 | rsa_context rsa; |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 3004 | dhm_context dhm; |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 3005 | |
| 3006 | if( verbose != 0 ) |
| 3007 | printf( " X.509 certificate load: " ); |
| 3008 | |
| 3009 | memset( &clicert, 0, sizeof( x509_cert ) ); |
| 3010 | |
| 3011 | ret = x509parse_crt( &clicert, (unsigned char *) test_cli_crt, |
| 3012 | strlen( test_cli_crt ) ); |
| 3013 | if( ret != 0 ) |
| 3014 | { |
| 3015 | if( verbose != 0 ) |
| 3016 | printf( "failed\n" ); |
| 3017 | |
| 3018 | return( ret ); |
| 3019 | } |
| 3020 | |
| 3021 | memset( &cacert, 0, sizeof( x509_cert ) ); |
| 3022 | |
| 3023 | ret = x509parse_crt( &cacert, (unsigned char *) test_ca_crt, |
| 3024 | strlen( test_ca_crt ) ); |
| 3025 | if( ret != 0 ) |
| 3026 | { |
| 3027 | if( verbose != 0 ) |
| 3028 | printf( "failed\n" ); |
| 3029 | |
| 3030 | return( ret ); |
| 3031 | } |
| 3032 | |
| 3033 | if( verbose != 0 ) |
| 3034 | printf( "passed\n X.509 private key load: " ); |
| 3035 | |
| 3036 | i = strlen( test_ca_key ); |
| 3037 | j = strlen( test_ca_pwd ); |
| 3038 | |
Paul Bakker | 66b78b2 | 2011-03-25 14:22:50 +0000 | [diff] [blame^] | 3039 | rsa_init( &rsa, RSA_PKCS_V15, 0 ); |
| 3040 | |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 3041 | if( ( ret = x509parse_key( &rsa, |
| 3042 | (unsigned char *) test_ca_key, i, |
| 3043 | (unsigned char *) test_ca_pwd, j ) ) != 0 ) |
| 3044 | { |
| 3045 | if( verbose != 0 ) |
| 3046 | printf( "failed\n" ); |
| 3047 | |
| 3048 | return( ret ); |
| 3049 | } |
| 3050 | |
| 3051 | if( verbose != 0 ) |
| 3052 | printf( "passed\n X.509 signature verify: "); |
| 3053 | |
Paul Bakker | b63b0af | 2011-01-13 17:54:59 +0000 | [diff] [blame] | 3054 | ret = x509parse_verify( &clicert, &cacert, NULL, "PolarSSL Client 2", &i, NULL, NULL ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 3055 | if( ret != 0 ) |
| 3056 | { |
Paul Bakker | 400ff6f | 2011-02-20 10:40:16 +0000 | [diff] [blame] | 3057 | printf("%02x", i); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 3058 | if( verbose != 0 ) |
| 3059 | printf( "failed\n" ); |
| 3060 | |
| 3061 | return( ret ); |
| 3062 | } |
| 3063 | |
| 3064 | if( verbose != 0 ) |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 3065 | printf( "passed\n X.509 DHM parameter load: " ); |
| 3066 | |
| 3067 | i = strlen( test_dhm_params ); |
| 3068 | j = strlen( test_ca_pwd ); |
| 3069 | |
| 3070 | if( ( ret = x509parse_dhm( &dhm, (unsigned char *) test_dhm_params, i ) ) != 0 ) |
| 3071 | { |
| 3072 | if( verbose != 0 ) |
| 3073 | printf( "failed\n" ); |
| 3074 | |
| 3075 | return( ret ); |
| 3076 | } |
| 3077 | |
| 3078 | if( verbose != 0 ) |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 3079 | printf( "passed\n\n" ); |
| 3080 | |
| 3081 | x509_free( &cacert ); |
| 3082 | x509_free( &clicert ); |
| 3083 | rsa_free( &rsa ); |
Paul Bakker | 1b57b06 | 2011-01-06 15:48:19 +0000 | [diff] [blame] | 3084 | dhm_free( &dhm ); |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 3085 | |
| 3086 | return( 0 ); |
Paul Bakker | de4d2ea | 2009-10-03 19:58:52 +0000 | [diff] [blame] | 3087 | #else |
| 3088 | ((void) verbose); |
| 3089 | return( POLARSSL_ERR_X509_FEATURE_UNAVAILABLE ); |
| 3090 | #endif |
Paul Bakker | 5121ce5 | 2009-01-03 21:22:43 +0000 | [diff] [blame] | 3091 | } |
| 3092 | |
| 3093 | #endif |
| 3094 | |
| 3095 | #endif |