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         if (!EVP_DigestInit_ex(&ctx, EVP_md5(), NULL))
  90                 goto err;
  91         if (!EVP_DigestUpdate(&ctx,(unsigned char *)f,strlen(f)))
  92                 goto err;
  93         OPENSSL_free(f);
  94         if(!EVP_DigestUpdate(&ctx,(unsigned char *)a->cert_info->serialNumber->data,
  95                 (unsigned long)a->cert_info->serialNumber->length))
  96                 goto err;
  97         if (!EVP_DigestFinal_ex(&ctx,&(md[0]),NULL))
  98                 goto err;
  99         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
 100                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
 101                 )&0xffffffffL;
 102         err:
 103         EVP_MD_CTX_cleanup(&ctx);
 104         return(ret);
 105         }
 106 #endif
 107 
 108 int X509_issuer_name_cmp(const X509 *a, const X509 *b)
 109         {
 110         return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer));
 111         }
 112 
 113 int X509_subject_name_cmp(const X509 *a, const X509 *b)
 114         {
 115         return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject));
 116         }
 117 
 118 int X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b)
 119         {
 120         return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer));
 121         }
 122 
 123 #ifndef OPENSSL_NO_SHA
 124 int X509_CRL_match(const X509_CRL *a, const X509_CRL *b)
 125         {
 126         return memcmp(a->sha1_hash, b->sha1_hash, 20);
 127         }
 128 #endif
 129 
 130 X509_NAME *X509_get_issuer_name(X509 *a)
 131         {
 132         return(a->cert_info->issuer);
 133         }
 134 
 135 unsigned long X509_issuer_name_hash(X509 *x)
 136         {
 137         return(X509_NAME_hash(x->cert_info->issuer));
 138         }
 139 
 140 #ifndef OPENSSL_NO_MD5
 141 unsigned long X509_issuer_name_hash_old(X509 *x)
 142         {
 143         return(X509_NAME_hash_old(x->cert_info->issuer));
 144         }
 145 #endif
 146 
 147 X509_NAME *X509_get_subject_name(X509 *a)
 148         {
 149         return(a->cert_info->subject);
 150         }
 151 
 152 ASN1_INTEGER *X509_get_serialNumber(X509 *a)
 153         {
 154         return(a->cert_info->serialNumber);
 155         }
 156 
 157 unsigned long X509_subject_name_hash(X509 *x)
 158         {
 159         return(X509_NAME_hash(x->cert_info->subject));
 160         }
 161 
 162 #ifndef OPENSSL_NO_MD5
 163 unsigned long X509_subject_name_hash_old(X509 *x)
 164         {
 165         return(X509_NAME_hash_old(x->cert_info->subject));
 166         }
 167 #endif
 168 
 169 #ifndef OPENSSL_NO_SHA
 170 /* Compare two certificates: they must be identical for
 171  * this to work. NB: Although "cmp" operations are generally
 172  * prototyped to take "const" arguments (eg. for use in
 173  * STACKs), the way X509 handling is - these operations may
 174  * involve ensuring the hashes are up-to-date and ensuring
 175  * certain cert information is cached. So this is the point
 176  * where the "depth-first" constification tree has to halt
 177  * with an evil cast.
 178  */
 179 int X509_cmp(const X509 *a, const X509 *b)
 180 {
 181         /* ensure hash is valid */
 182         X509_check_purpose((X509 *)a, -1, 0);
 183         X509_check_purpose((X509 *)b, -1, 0);
 184 
 185         return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
 186 }
 187 #endif
 188 
 189 
 190 int 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                 {
 198                 ret = i2d_X509_NAME((X509_NAME *)a, NULL);
 199                 if (ret < 0)
 200                         return -2;
 201                 }
 202 
 203         if (!b->canon_enc || b->modified)
 204                 {
 205                 ret = i2d_X509_NAME((X509_NAME *)b, NULL);
 206                 if (ret < 0)
 207                         return -2;
 208                 }
 209 
 210         ret = a->canon_enclen - b->canon_enclen;
 211 
 212         if (ret)
 213                 return ret;
 214 
 215         return memcmp(a->canon_enc, b->canon_enc, a->canon_enclen);
 216 
 217         }
 218 
 219 unsigned long X509_NAME_hash(X509_NAME *x)
 220         {
 221         unsigned long ret=0;
 222         unsigned char md[SHA_DIGEST_LENGTH];
 223 
 224         /* Make sure X509_NAME structure contains valid cached encoding */
 225         i2d_X509_NAME(x,NULL);
 226         if (!EVP_Digest(x->canon_enc, x->canon_enclen, md, NULL, EVP_sha1(),
 227                 NULL))
 228                 return 0;
 229 
 230         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
 231                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
 232                 )&0xffffffffL;
 233         return(ret);
 234         }
 235 
 236 
 237 #ifndef OPENSSL_NO_MD5
 238 /* I now DER encode the name and hash it.  Since I cache the DER encoding,
 239  * this is reasonably efficient. */
 240 
 241 unsigned long X509_NAME_hash_old(X509_NAME *x)
 242         {
 243         EVP_MD_CTX md_ctx;
 244         unsigned long ret=0;
 245         unsigned char md[16];
 246 
 247         /* Make sure X509_NAME structure contains valid cached encoding */
 248         i2d_X509_NAME(x,NULL);
 249         EVP_MD_CTX_init(&md_ctx);
 250         EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
 251         if (EVP_DigestInit_ex(&md_ctx, EVP_md5(), NULL)
 252             && EVP_DigestUpdate(&md_ctx, x->bytes->data, x->bytes->length)
 253             && EVP_DigestFinal_ex(&md_ctx,md,NULL))
 254                 ret=(((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
 255                      ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
 256                      )&0xffffffffL;
 257         EVP_MD_CTX_cleanup(&md_ctx);
 258 
 259         return(ret);
 260         }
 261 #endif
 262 
 263 /* Search a stack of X509 for a match */
 264 X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
 265                 ASN1_INTEGER *serial)
 266         {
 267         int i;
 268         X509_CINF cinf;
 269         X509 x,*x509=NULL;
 270 
 271         if(!sk) 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                 {
 279                 x509=sk_X509_value(sk,i);
 280                 if (X509_issuer_and_serial_cmp(x509,&x) == 0)
 281                         return(x509);
 282                 }
 283         return(NULL);
 284         }
 285 
 286 X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
 287         {
 288         X509 *x509;
 289         int i;
 290 
 291         for (i=0; i<sk_X509_num(sk); i++)
 292                 {
 293                 x509=sk_X509_value(sk,i);
 294                 if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
 295                         return(x509);
 296                 }
 297         return(NULL);
 298         }
 299 
 300 EVP_PKEY *X509_get_pubkey(X509 *x)
 301         {
 302         if ((x == NULL) || (x->cert_info == NULL))
 303                 return(NULL);
 304         return(X509_PUBKEY_get(x->cert_info->key));
 305         }
 306 
 307 ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x)
 308         {
 309         if(!x) return NULL;
 310         return x->cert_info->key->public_key;
 311         }
 312 
 313 int X509_check_private_key(X509 *x, EVP_PKEY *k)
 314         {
 315         EVP_PKEY *xk;
 316         int ret;
 317 
 318         xk=X509_get_pubkey(x);
 319 
 320         if (xk)
 321                 ret = EVP_PKEY_cmp(xk, k);
 322         else
 323                 ret = -2;
 324 
 325         switch (ret)
 326                 {
 327         case 1:
 328                 break;
 329         case 0:
 330                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
 331                 break;
 332         case -1:
 333                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
 334                 break;
 335         case -2:
 336                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
 337                 }
 338         if (xk)
 339                 EVP_PKEY_free(xk);
 340         if (ret > 0)
 341                 return 1;
 342         return 0;
 343         }