x509_cmp.c revision 296341
1/* crypto/x509/x509_cmp.c */ 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 <stdio.h> 60#include <ctype.h> 61#include "cryptlib.h" 62#include <openssl/asn1.h> 63#include <openssl/objects.h> 64#include <openssl/x509.h> 65#include <openssl/x509v3.h> 66 67int X509_issuer_and_serial_cmp(const X509 *a, const X509 *b) 68{ 69 int i; 70 X509_CINF *ai, *bi; 71 72 ai = a->cert_info; 73 bi = b->cert_info; 74 i = M_ASN1_INTEGER_cmp(ai->serialNumber, bi->serialNumber); 75 if (i) 76 return (i); 77 return (X509_NAME_cmp(ai->issuer, bi->issuer)); 78} 79 80#ifndef OPENSSL_NO_MD5 81unsigned long X509_issuer_and_serial_hash(X509 *a) 82{ 83 unsigned long ret = 0; 84 EVP_MD_CTX ctx; 85 unsigned char md[16]; 86 char *f; 87 88 EVP_MD_CTX_init(&ctx); 89 f = X509_NAME_oneline(a->cert_info->issuer, NULL, 0); 90 if (!EVP_DigestInit_ex(&ctx, EVP_md5(), NULL)) 91 goto err; 92 if (!EVP_DigestUpdate(&ctx, (unsigned char *)f, strlen(f))) 93 goto err; 94 OPENSSL_free(f); 95 if (!EVP_DigestUpdate 96 (&ctx, (unsigned char *)a->cert_info->serialNumber->data, 97 (unsigned long)a->cert_info->serialNumber->length)) 98 goto err; 99 if (!EVP_DigestFinal_ex(&ctx, &(md[0]), NULL)) 100 goto err; 101 ret = (((unsigned long)md[0]) | ((unsigned long)md[1] << 8L) | 102 ((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L) 103 ) & 0xffffffffL; 104 err: 105 EVP_MD_CTX_cleanup(&ctx); 106 return (ret); 107} 108#endif 109 110int X509_issuer_name_cmp(const X509 *a, const X509 *b) 111{ 112 return (X509_NAME_cmp(a->cert_info->issuer, b->cert_info->issuer)); 113} 114 115int X509_subject_name_cmp(const X509 *a, const X509 *b) 116{ 117 return (X509_NAME_cmp(a->cert_info->subject, b->cert_info->subject)); 118} 119 120int X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b) 121{ 122 return (X509_NAME_cmp(a->crl->issuer, b->crl->issuer)); 123} 124 125#ifndef OPENSSL_NO_SHA 126int X509_CRL_match(const X509_CRL *a, const X509_CRL *b) 127{ 128 return memcmp(a->sha1_hash, b->sha1_hash, 20); 129} 130#endif 131 132X509_NAME *X509_get_issuer_name(X509 *a) 133{ 134 return (a->cert_info->issuer); 135} 136 137unsigned long X509_issuer_name_hash(X509 *x) 138{ 139 return (X509_NAME_hash(x->cert_info->issuer)); 140} 141 142#ifndef OPENSSL_NO_MD5 143unsigned long X509_issuer_name_hash_old(X509 *x) 144{ 145 return (X509_NAME_hash_old(x->cert_info->issuer)); 146} 147#endif 148 149X509_NAME *X509_get_subject_name(X509 *a) 150{ 151 return (a->cert_info->subject); 152} 153 154ASN1_INTEGER *X509_get_serialNumber(X509 *a) 155{ 156 return (a->cert_info->serialNumber); 157} 158 159unsigned long X509_subject_name_hash(X509 *x) 160{ 161 return (X509_NAME_hash(x->cert_info->subject)); 162} 163 164#ifndef OPENSSL_NO_MD5 165unsigned long X509_subject_name_hash_old(X509 *x) 166{ 167 return (X509_NAME_hash_old(x->cert_info->subject)); 168} 169#endif 170 171#ifndef OPENSSL_NO_SHA 172/* 173 * Compare two certificates: they must be identical for this to work. NB: 174 * Although "cmp" operations are generally prototyped to take "const" 175 * arguments (eg. for use in STACKs), the way X509 handling is - these 176 * operations may involve ensuring the hashes are up-to-date and ensuring 177 * certain cert information is cached. So this is the point where the 178 * "depth-first" constification tree has to halt with an evil cast. 179 */ 180int X509_cmp(const X509 *a, const X509 *b) 181{ 182 /* ensure hash is valid */ 183 X509_check_purpose((X509 *)a, -1, 0); 184 X509_check_purpose((X509 *)b, -1, 0); 185 186 return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH); 187} 188#endif 189 190int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b) 191{ 192 int ret; 193 194 /* Ensure canonical encoding is present and up to date */ 195 196 if (!a->canon_enc || a->modified) { 197 ret = i2d_X509_NAME((X509_NAME *)a, NULL); 198 if (ret < 0) 199 return -2; 200 } 201 202 if (!b->canon_enc || b->modified) { 203 ret = i2d_X509_NAME((X509_NAME *)b, NULL); 204 if (ret < 0) 205 return -2; 206 } 207 208 ret = a->canon_enclen - b->canon_enclen; 209 210 if (ret) 211 return ret; 212 213 return memcmp(a->canon_enc, b->canon_enc, a->canon_enclen); 214 215} 216 217unsigned long X509_NAME_hash(X509_NAME *x) 218{ 219 unsigned long ret = 0; 220 unsigned char md[SHA_DIGEST_LENGTH]; 221 222 /* Make sure X509_NAME structure contains valid cached encoding */ 223 i2d_X509_NAME(x, NULL); 224 if (!EVP_Digest(x->canon_enc, x->canon_enclen, md, NULL, EVP_sha1(), 225 NULL)) 226 return 0; 227 228 ret = (((unsigned long)md[0]) | ((unsigned long)md[1] << 8L) | 229 ((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L) 230 ) & 0xffffffffL; 231 return (ret); 232} 233 234#ifndef OPENSSL_NO_MD5 235/* 236 * I now DER encode the name and hash it. Since I cache the DER encoding, 237 * this is reasonably efficient. 238 */ 239 240unsigned long X509_NAME_hash_old(X509_NAME *x) 241{ 242 EVP_MD_CTX md_ctx; 243 unsigned long ret = 0; 244 unsigned char md[16]; 245 246 /* Make sure X509_NAME structure contains valid cached encoding */ 247 i2d_X509_NAME(x, NULL); 248 EVP_MD_CTX_init(&md_ctx); 249 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 250 if (EVP_DigestInit_ex(&md_ctx, EVP_md5(), NULL) 251 && EVP_DigestUpdate(&md_ctx, x->bytes->data, x->bytes->length) 252 && EVP_DigestFinal_ex(&md_ctx, md, NULL)) 253 ret = (((unsigned long)md[0]) | ((unsigned long)md[1] << 8L) | 254 ((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L) 255 ) & 0xffffffffL; 256 EVP_MD_CTX_cleanup(&md_ctx); 257 258 return (ret); 259} 260#endif 261 262/* Search a stack of X509 for a match */ 263X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name, 264 ASN1_INTEGER *serial) 265{ 266 int i; 267 X509_CINF cinf; 268 X509 x, *x509 = NULL; 269 270 if (!sk) 271 return NULL; 272 273 x.cert_info = &cinf; 274 cinf.serialNumber = serial; 275 cinf.issuer = name; 276 277 for (i = 0; i < sk_X509_num(sk); i++) { 278 x509 = sk_X509_value(sk, i); 279 if (X509_issuer_and_serial_cmp(x509, &x) == 0) 280 return (x509); 281 } 282 return (NULL); 283} 284 285X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name) 286{ 287 X509 *x509; 288 int i; 289 290 for (i = 0; i < sk_X509_num(sk); i++) { 291 x509 = sk_X509_value(sk, i); 292 if (X509_NAME_cmp(X509_get_subject_name(x509), name) == 0) 293 return (x509); 294 } 295 return (NULL); 296} 297 298EVP_PKEY *X509_get_pubkey(X509 *x) 299{ 300 if ((x == NULL) || (x->cert_info == NULL)) 301 return (NULL); 302 return (X509_PUBKEY_get(x->cert_info->key)); 303} 304 305ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x) 306{ 307 if (!x) 308 return NULL; 309 return x->cert_info->key->public_key; 310} 311 312int X509_check_private_key(X509 *x, EVP_PKEY *k) 313{ 314 EVP_PKEY *xk; 315 int ret; 316 317 xk = X509_get_pubkey(x); 318 319 if (xk) 320 ret = EVP_PKEY_cmp(xk, k); 321 else 322 ret = -2; 323 324 switch (ret) { 325 case 1: 326 break; 327 case 0: 328 X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_KEY_VALUES_MISMATCH); 329 break; 330 case -1: 331 X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_KEY_TYPE_MISMATCH); 332 break; 333 case -2: 334 X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_UNKNOWN_KEY_TYPE); 335 } 336 if (xk) 337 EVP_PKEY_free(xk); 338 if (ret > 0) 339 return 1; 340 return 0; 341} 342