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