1 /* $OpenBSD: x509_cmp.c,v 1.20 2014/07/10 13:58:23 jsing Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <ctype.h> 60 #include <stdio.h> 61 #include <string.h> 62 63 #include "cryptlib.h" 64 #include <openssl/asn1.h> 65 #include <openssl/objects.h> 66 #include <openssl/x509.h> 67 #include <openssl/x509v3.h> 68 69 int 70 X509_issuer_and_serial_cmp(const X509 *a, const X509 *b) 71 { 72 int i; 73 X509_CINF *ai, *bi; 74 75 ai = a->cert_info; 76 bi = b->cert_info; 77 i = M_ASN1_INTEGER_cmp(ai->serialNumber, bi->serialNumber); 78 if (i) 79 return (i); 80 return (X509_NAME_cmp(ai->issuer, bi->issuer)); 81 } 82 83 #ifndef OPENSSL_NO_MD5 84 unsigned long 85 X509_issuer_and_serial_hash(X509 *a) 86 { 87 unsigned long ret = 0; 88 EVP_MD_CTX ctx; 89 unsigned char md[16]; 90 char *f; 91 92 EVP_MD_CTX_init(&ctx); 93 f = X509_NAME_oneline(a->cert_info->issuer, NULL, 0); 94 if (!EVP_DigestInit_ex(&ctx, EVP_md5(), NULL)) 95 goto err; 96 if (!EVP_DigestUpdate(&ctx, (unsigned char *)f, strlen(f))) 97 goto err; 98 free(f); 99 if (!EVP_DigestUpdate(&ctx, 100 (unsigned char *)a->cert_info->serialNumber->data, 101 (unsigned long)a->cert_info->serialNumber->length)) 102 goto err; 103 if (!EVP_DigestFinal_ex(&ctx, &(md[0]), NULL)) 104 goto err; 105 ret = (((unsigned long)md[0]) | ((unsigned long)md[1] << 8L) | 106 ((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L)) & 107 0xffffffffL; 108 109 err: 110 EVP_MD_CTX_cleanup(&ctx); 111 return (ret); 112 } 113 #endif 114 115 int 116 X509_issuer_name_cmp(const X509 *a, const X509 *b) 117 { 118 return (X509_NAME_cmp(a->cert_info->issuer, b->cert_info->issuer)); 119 } 120 121 int 122 X509_subject_name_cmp(const X509 *a, const X509 *b) 123 { 124 return (X509_NAME_cmp(a->cert_info->subject, b->cert_info->subject)); 125 } 126 127 int 128 X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b) 129 { 130 return (X509_NAME_cmp(a->crl->issuer, b->crl->issuer)); 131 } 132 133 #ifndef OPENSSL_NO_SHA 134 int 135 X509_CRL_match(const X509_CRL *a, const X509_CRL *b) 136 { 137 return memcmp(a->sha1_hash, b->sha1_hash, 20); 138 } 139 #endif 140 141 X509_NAME * 142 X509_get_issuer_name(X509 *a) 143 { 144 return (a->cert_info->issuer); 145 } 146 147 unsigned long 148 X509_issuer_name_hash(X509 *x) 149 { 150 return (X509_NAME_hash(x->cert_info->issuer)); 151 } 152 153 #ifndef OPENSSL_NO_MD5 154 unsigned long 155 X509_issuer_name_hash_old(X509 *x) 156 { 157 return (X509_NAME_hash_old(x->cert_info->issuer)); 158 } 159 #endif 160 161 X509_NAME * 162 X509_get_subject_name(X509 *a) 163 { 164 return (a->cert_info->subject); 165 } 166 167 ASN1_INTEGER * 168 X509_get_serialNumber(X509 *a) 169 { 170 return (a->cert_info->serialNumber); 171 } 172 173 unsigned long 174 X509_subject_name_hash(X509 *x) 175 { 176 return (X509_NAME_hash(x->cert_info->subject)); 177 } 178 179 #ifndef OPENSSL_NO_MD5 180 unsigned long 181 X509_subject_name_hash_old(X509 *x) 182 { 183 return (X509_NAME_hash_old(x->cert_info->subject)); 184 } 185 #endif 186 187 #ifndef OPENSSL_NO_SHA 188 /* Compare two certificates: they must be identical for 189 * this to work. NB: Although "cmp" operations are generally 190 * prototyped to take "const" arguments (eg. for use in 191 * STACKs), the way X509 handling is - these operations may 192 * involve ensuring the hashes are up-to-date and ensuring 193 * certain cert information is cached. So this is the point 194 * where the "depth-first" constification tree has to halt 195 * with an evil cast. 196 */ 197 int 198 X509_cmp(const X509 *a, const X509 *b) 199 { 200 /* ensure hash is valid */ 201 X509_check_purpose((X509 *)a, -1, 0); 202 X509_check_purpose((X509 *)b, -1, 0); 203 204 return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH); 205 } 206 #endif 207 208 int 209 X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b) 210 { 211 int ret; 212 213 /* Ensure canonical encoding is present and up to date */ 214 if (!a->canon_enc || a->modified) { 215 ret = i2d_X509_NAME((X509_NAME *)a, NULL); 216 if (ret < 0) 217 return -2; 218 } 219 if (!b->canon_enc || b->modified) { 220 ret = i2d_X509_NAME((X509_NAME *)b, NULL); 221 if (ret < 0) 222 return -2; 223 } 224 ret = a->canon_enclen - b->canon_enclen; 225 if (ret) 226 return ret; 227 return memcmp(a->canon_enc, b->canon_enc, a->canon_enclen); 228 } 229 230 unsigned long 231 X509_NAME_hash(X509_NAME *x) 232 { 233 unsigned long ret = 0; 234 unsigned char md[SHA_DIGEST_LENGTH]; 235 236 /* Make sure X509_NAME structure contains valid cached encoding */ 237 i2d_X509_NAME(x, NULL); 238 if (!EVP_Digest(x->canon_enc, x->canon_enclen, md, NULL, EVP_sha1(), 239 NULL)) 240 return 0; 241 242 ret = (((unsigned long)md[0]) | ((unsigned long)md[1] << 8L) | 243 ((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L)) & 244 0xffffffffL; 245 return (ret); 246 } 247 248 249 #ifndef OPENSSL_NO_MD5 250 /* I now DER encode the name and hash it. Since I cache the DER encoding, 251 * this is reasonably efficient. */ 252 253 unsigned long 254 X509_NAME_hash_old(X509_NAME *x) 255 { 256 EVP_MD_CTX md_ctx; 257 unsigned long ret = 0; 258 unsigned char md[16]; 259 260 /* Make sure X509_NAME structure contains valid cached encoding */ 261 i2d_X509_NAME(x, NULL); 262 EVP_MD_CTX_init(&md_ctx); 263 if (EVP_DigestInit_ex(&md_ctx, EVP_md5(), NULL) && 264 EVP_DigestUpdate(&md_ctx, x->bytes->data, x->bytes->length) && 265 EVP_DigestFinal_ex(&md_ctx, md, NULL)) 266 ret = (((unsigned long)md[0]) | 267 ((unsigned long)md[1] << 8L) | 268 ((unsigned long)md[2] << 16L) | 269 ((unsigned long)md[3] << 24L)) & 270 0xffffffffL; 271 EVP_MD_CTX_cleanup(&md_ctx); 272 273 return (ret); 274 } 275 #endif 276 277 /* Search a stack of X509 for a match */ 278 X509 * 279 X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name, 280 ASN1_INTEGER *serial) 281 { 282 int i; 283 X509_CINF cinf; 284 X509 x, *x509 = NULL; 285 286 if (!sk) 287 return NULL; 288 289 x.cert_info = &cinf; 290 cinf.serialNumber = serial; 291 cinf.issuer = name; 292 293 for (i = 0; i < sk_X509_num(sk); i++) { 294 x509 = sk_X509_value(sk, i); 295 if (X509_issuer_and_serial_cmp(x509, &x) == 0) 296 return (x509); 297 } 298 return (NULL); 299 } 300 301 X509 * 302 X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name) 303 { 304 X509 *x509; 305 int i; 306 307 for (i = 0; i < sk_X509_num(sk); i++) { 308 x509 = sk_X509_value(sk, i); 309 if (X509_NAME_cmp(X509_get_subject_name(x509), name) == 0) 310 return (x509); 311 } 312 return (NULL); 313 } 314 315 EVP_PKEY * 316 X509_get_pubkey(X509 *x) 317 { 318 if ((x == NULL) || (x->cert_info == NULL)) 319 return (NULL); 320 return (X509_PUBKEY_get(x->cert_info->key)); 321 } 322 323 ASN1_BIT_STRING * 324 X509_get0_pubkey_bitstr(const X509 *x) 325 { 326 if (!x) 327 return NULL; 328 return x->cert_info->key->public_key; 329 } 330 331 int 332 X509_check_private_key(X509 *x, EVP_PKEY *k) 333 { 334 EVP_PKEY *xk; 335 int ret; 336 337 xk = X509_get_pubkey(x); 338 339 if (xk) 340 ret = EVP_PKEY_cmp(xk, k); 341 else 342 ret = -2; 343 344 switch (ret) { 345 case 1: 346 break; 347 case 0: 348 X509err(X509_F_X509_CHECK_PRIVATE_KEY, 349 X509_R_KEY_VALUES_MISMATCH); 350 break; 351 case -1: 352 X509err(X509_F_X509_CHECK_PRIVATE_KEY, 353 X509_R_KEY_TYPE_MISMATCH); 354 break; 355 case -2: 356 X509err(X509_F_X509_CHECK_PRIVATE_KEY, 357 X509_R_UNKNOWN_KEY_TYPE); 358 } 359 if (xk) 360 EVP_PKEY_free(xk); 361 if (ret > 0) 362 return 1; 363 return 0; 364 } 365