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 int rv; 183 184 /* ensure hash is valid */ 185 X509_check_purpose((X509 *)a, -1, 0); 186 X509_check_purpose((X509 *)b, -1, 0); 187 188 rv = memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH); 189 if (rv) 190 return rv; 191 /* Check for match against stored encoding too */ 192 if (!a->cert_info->enc.modified && !b->cert_info->enc.modified) { 193 rv = (int)(a->cert_info->enc.len - b->cert_info->enc.len); 194 if (rv) 195 return rv; 196 return memcmp(a->cert_info->enc.enc, b->cert_info->enc.enc, 197 a->cert_info->enc.len); 198 } 199 return rv; 200} 201#endif 202 203int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b) 204{ 205 int ret; 206 207 /* Ensure canonical encoding is present and up to date */ 208 209 if (!a->canon_enc || a->modified) { 210 ret = i2d_X509_NAME((X509_NAME *)a, NULL); 211 if (ret < 0) 212 return -2; 213 } 214 215 if (!b->canon_enc || b->modified) { 216 ret = i2d_X509_NAME((X509_NAME *)b, NULL); 217 if (ret < 0) 218 return -2; 219 } 220 221 ret = a->canon_enclen - b->canon_enclen; 222 223 if (ret) 224 return ret; 225 226 return memcmp(a->canon_enc, b->canon_enc, a->canon_enclen); 227 228} 229 230unsigned long X509_NAME_hash(X509_NAME *x) 231{ 232 unsigned long ret = 0; 233 unsigned char md[SHA_DIGEST_LENGTH]; 234 235 /* Make sure X509_NAME structure contains valid cached encoding */ 236 i2d_X509_NAME(x, NULL); 237 if (!EVP_Digest(x->canon_enc, x->canon_enclen, md, NULL, EVP_sha1(), 238 NULL)) 239 return 0; 240 241 ret = (((unsigned long)md[0]) | ((unsigned long)md[1] << 8L) | 242 ((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L) 243 ) & 0xffffffffL; 244 return (ret); 245} 246 247#ifndef OPENSSL_NO_MD5 248/* 249 * I now DER encode the name and hash it. Since I cache the DER encoding, 250 * this is reasonably efficient. 251 */ 252 253unsigned long X509_NAME_hash_old(X509_NAME *x) 254{ 255 EVP_MD_CTX md_ctx; 256 unsigned long ret = 0; 257 unsigned char md[16]; 258 259 /* Make sure X509_NAME structure contains valid cached encoding */ 260 i2d_X509_NAME(x, NULL); 261 EVP_MD_CTX_init(&md_ctx); 262 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 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]) | ((unsigned long)md[1] << 8L) | 267 ((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L) 268 ) & 0xffffffffL; 269 EVP_MD_CTX_cleanup(&md_ctx); 270 271 return (ret); 272} 273#endif 274 275/* Search a stack of X509 for a match */ 276X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name, 277 ASN1_INTEGER *serial) 278{ 279 int i; 280 X509_CINF cinf; 281 X509 x, *x509 = NULL; 282 283 if (!sk) 284 return NULL; 285 286 x.cert_info = &cinf; 287 cinf.serialNumber = serial; 288 cinf.issuer = name; 289 290 for (i = 0; i < sk_X509_num(sk); i++) { 291 x509 = sk_X509_value(sk, i); 292 if (X509_issuer_and_serial_cmp(x509, &x) == 0) 293 return (x509); 294 } 295 return (NULL); 296} 297 298X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name) 299{ 300 X509 *x509; 301 int i; 302 303 for (i = 0; i < sk_X509_num(sk); i++) { 304 x509 = sk_X509_value(sk, i); 305 if (X509_NAME_cmp(X509_get_subject_name(x509), name) == 0) 306 return (x509); 307 } 308 return (NULL); 309} 310 311EVP_PKEY *X509_get_pubkey(X509 *x) 312{ 313 if ((x == NULL) || (x->cert_info == NULL)) 314 return (NULL); 315 return (X509_PUBKEY_get(x->cert_info->key)); 316} 317 318ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x) 319{ 320 if (!x) 321 return NULL; 322 return x->cert_info->key->public_key; 323} 324 325int X509_check_private_key(X509 *x, EVP_PKEY *k) 326{ 327 EVP_PKEY *xk; 328 int ret; 329 330 xk = X509_get_pubkey(x); 331 332 if (xk) 333 ret = EVP_PKEY_cmp(xk, k); 334 else 335 ret = -2; 336 337 switch (ret) { 338 case 1: 339 break; 340 case 0: 341 X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_KEY_VALUES_MISMATCH); 342 break; 343 case -1: 344 X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_KEY_TYPE_MISMATCH); 345 break; 346 case -2: 347 X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_UNKNOWN_KEY_TYPE); 348 } 349 if (xk) 350 EVP_PKEY_free(xk); 351 if (ret > 0) 352 return 1; 353 return 0; 354} 355