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 EVP_DigestInit_ex(&ctx, EVP_md5(), NULL); 91 EVP_DigestUpdate(&ctx,(unsigned char *)f,ret); 92 OPENSSL_free(f); 93 EVP_DigestUpdate(&ctx,(unsigned char *)a->cert_info->serialNumber->data, 94 (unsigned long)a->cert_info->serialNumber->length); 95 EVP_DigestFinal_ex(&ctx,&(md[0]),NULL); 96 ret=( ((unsigned long)md[0] )|((unsigned long)md[1]<<8L)| 97 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L) 98 )&0xffffffffL; 99 EVP_MD_CTX_cleanup(&ctx); 100 return(ret); 101 } 102 #endif 103 104 int X509_issuer_name_cmp(const X509 *a, const X509 *b) 105 { 106 return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer)); 107 } 108 109 int X509_subject_name_cmp(const X509 *a, const X509 *b) 110 { 111 return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject)); 112 } 113 114 int X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b) 115 { 116 return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer)); 117 } 118 119 X509_NAME *X509_get_issuer_name(X509 *a) 120 { 121 return(a->cert_info->issuer); 122 } 123 124 unsigned long X509_issuer_name_hash(X509 *x) 125 { 126 return(X509_NAME_hash(x->cert_info->issuer)); 127 } 128 129 X509_NAME *X509_get_subject_name(X509 *a) 130 { 131 return(a->cert_info->subject); 132 } 133 134 ASN1_INTEGER *X509_get_serialNumber(X509 *a) 135 { 136 return(a->cert_info->serialNumber); 137 } 138 139 unsigned long X509_subject_name_hash(X509 *x) 140 { 141 return(X509_NAME_hash(x->cert_info->subject)); 142 } 143 144 #ifndef OPENSSL_NO_SHA 145 /* Compare two certificates: they must be identical for 146 * this to work. NB: Although "cmp" operations are generally 147 * prototyped to take "const" arguments (eg. for use in 148 * STACKs), the way X509 handling is - these operations may 149 * involve ensuring the hashes are up-to-date and ensuring 150 * certain cert information is cached. So this is the point 151 * where the "depth-first" constification tree has to halt 152 * with an evil cast. 153 */ 154 int X509_cmp(const X509 *a, const X509 *b) 155 { 156 /* ensure hash is valid */ 157 X509_check_purpose((X509 *)a, -1, 0); 158 X509_check_purpose((X509 *)b, -1, 0); 159 160 return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH); 161 } 162 #endif 163 164 165 /* Case insensitive string comparision */ 166 static int nocase_cmp(const ASN1_STRING *a, const ASN1_STRING *b) 167 { 168 int i; 169 170 if (a->length != b->length) 171 return (a->length - b->length); 172 173 for (i=0; i<a->length; i++) 174 { 175 int ca, cb; 176 177 ca = tolower(a->data[i]); 178 cb = tolower(b->data[i]); 179 180 if (ca != cb) 181 return(ca-cb); 182 } 183 return 0; 184 } 185 186 /* Case insensitive string comparision with space normalization 187 * Space normalization - ignore leading, trailing spaces, 188 * multiple spaces between characters are replaced by single space 189 */ 190 static int nocase_spacenorm_cmp(const ASN1_STRING *a, const ASN1_STRING *b) 191 { 192 unsigned char *pa = NULL, *pb = NULL; 193 int la, lb; 194 195 la = a->length; 196 lb = b->length; 197 pa = a->data; 198 pb = b->data; 199 200 /* skip leading spaces */ 201 while (la > 0 && isspace(*pa)) 202 { 203 la--; 204 pa++; 205 } 206 while (lb > 0 && isspace(*pb)) 207 { 208 lb--; 209 pb++; 210 } 211 212 /* skip trailing spaces */ 213 while (la > 0 && isspace(pa[la-1])) 214 la--; 215 while (lb > 0 && isspace(pb[lb-1])) 216 lb--; 217 218 /* compare strings with space normalization */ 219 while (la > 0 && lb > 0) 220 { 221 int ca, cb; 222 223 /* compare character */ 224 ca = tolower(*pa); 225 cb = tolower(*pb); 226 if (ca != cb) 227 return (ca - cb); 228 229 pa++; pb++; 230 la--; lb--; 231 232 if (la <= 0 || lb <= 0) 233 break; 234 235 /* is white space next character ? */ 236 if (isspace(*pa) && isspace(*pb)) 237 { 238 /* skip remaining white spaces */ 239 while (la > 0 && isspace(*pa)) 240 { 241 la--; 242 pa++; 243 } 244 while (lb > 0 && isspace(*pb)) 245 { 246 lb--; 247 pb++; 248 } 249 } 250 } 251 if (la > 0 || lb > 0) 252 return la - lb; 253 254 return 0; 255 } 256 257 int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b) 258 { 259 int i,j; 260 X509_NAME_ENTRY *na,*nb; 261 262 if (sk_X509_NAME_ENTRY_num(a->entries) 263 != sk_X509_NAME_ENTRY_num(b->entries)) 264 return sk_X509_NAME_ENTRY_num(a->entries) 265 -sk_X509_NAME_ENTRY_num(b->entries); 266 for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--) 267 { 268 na=sk_X509_NAME_ENTRY_value(a->entries,i); 269 nb=sk_X509_NAME_ENTRY_value(b->entries,i); 270 j=na->value->type-nb->value->type; 271 if (j) return(j); 272 if (na->value->type == V_ASN1_PRINTABLESTRING) 273 j=nocase_spacenorm_cmp(na->value, nb->value); 274 else if (na->value->type == V_ASN1_IA5STRING 275 && OBJ_obj2nid(na->object) == NID_pkcs9_emailAddress) 276 j=nocase_cmp(na->value, nb->value); 277 else 278 { 279 j=na->value->length-nb->value->length; 280 if (j) return(j); 281 j=memcmp(na->value->data,nb->value->data, 282 na->value->length); 283 } 284 if (j) return(j); 285 j=na->set-nb->set; 286 if (j) return(j); 287 } 288 289 /* We will check the object types after checking the values 290 * since the values will more often be different than the object 291 * types. */ 292 for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--) 293 { 294 na=sk_X509_NAME_ENTRY_value(a->entries,i); 295 nb=sk_X509_NAME_ENTRY_value(b->entries,i); 296 j=OBJ_cmp(na->object,nb->object); 297 if (j) return(j); 298 } 299 return(0); 300 } 301 302 #ifndef OPENSSL_NO_MD5 303 /* I now DER encode the name and hash it. Since I cache the DER encoding, 304 * this is reasonably efficient. */ 305 unsigned long X509_NAME_hash(X509_NAME *x) 306 { 307 unsigned long ret=0; 308 unsigned char md[16]; 309 310 /* Make sure X509_NAME structure contains valid cached encoding */ 311 i2d_X509_NAME(x,NULL); 312 EVP_Digest(x->bytes->data, x->bytes->length, md, NULL, EVP_md5(), NULL); 313 314 ret=( ((unsigned long)md[0] )|((unsigned long)md[1]<<8L)| 315 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L) 316 )&0xffffffffL; 317 return(ret); 318 } 319 #endif 320 321 /* Search a stack of X509 for a match */ 322 X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name, 323 ASN1_INTEGER *serial) 324 { 325 int i; 326 X509_CINF cinf; 327 X509 x,*x509=NULL; 328 329 if(!sk) return NULL; 330 331 x.cert_info= &cinf; 332 cinf.serialNumber=serial; 333 cinf.issuer=name; 334 335 for (i=0; i<sk_X509_num(sk); i++) 336 { 337 x509=sk_X509_value(sk,i); 338 if (X509_issuer_and_serial_cmp(x509,&x) == 0) 339 return(x509); 340 } 341 return(NULL); 342 } 343 344 X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name) 345 { 346 X509 *x509; 347 int i; 348 349 for (i=0; i<sk_X509_num(sk); i++) 350 { 351 x509=sk_X509_value(sk,i); 352 if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0) 353 return(x509); 354 } 355 return(NULL); 356 } 357 358 EVP_PKEY *X509_get_pubkey(X509 *x) 359 { 360 if ((x == NULL) || (x->cert_info == NULL)) 361 return(NULL); 362 return(X509_PUBKEY_get(x->cert_info->key)); 363 } 364 365 ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x) 366 { 367 if(!x) return NULL; 368 return x->cert_info->key->public_key; 369 } 370 371 int X509_check_private_key(X509 *x, EVP_PKEY *k) 372 { 373 EVP_PKEY *xk=NULL; 374 int ok=0; 375 376 xk=X509_get_pubkey(x); 377 if (xk->type != k->type) 378 { 379 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH); 380 goto err; 381 } 382 switch (k->type) 383 { 384 #ifndef OPENSSL_NO_RSA 385 case EVP_PKEY_RSA: 386 if (BN_cmp(xk->pkey.rsa->n,k->pkey.rsa->n) != 0 387 || BN_cmp(xk->pkey.rsa->e,k->pkey.rsa->e) != 0) 388 { 389 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH); 390 goto err; 391 } 392 break; 393 #endif 394 #ifndef OPENSSL_NO_DSA 395 case EVP_PKEY_DSA: 396 if (BN_cmp(xk->pkey.dsa->pub_key,k->pkey.dsa->pub_key) != 0) 397 { 398 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH); 399 goto err; 400 } 401 break; 402 #endif 403 #ifndef OPENSSL_NO_DH 404 case EVP_PKEY_DH: 405 /* No idea */ 406 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_CANT_CHECK_DH_KEY); 407 goto err; 408 #endif 409 default: 410 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE); 411 goto err; 412 } 413 414 ok=1; 415 err: 416 EVP_PKEY_free(xk); 417 return(ok); 418 } 419