crypto/x509/x509_cmp.c

   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 "cryptlib.h"
  61 #include <openssl/asn1.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/x509.h>
  64 #include <openssl/x509v3.h>
  65
  66 int X509_issuer_and_serial_cmp(X509 *a, X509 *b)
  67         {
  68         int i;
  69         X509_CINF *ai,*bi;
  70
  71         ai=a->cert_info;
  72         bi=b->cert_info;
  73         i=M_ASN1_INTEGER_cmp(ai->serialNumber,bi->serialNumber);
  74         if (i) return(i);
  75         return(X509_NAME_cmp(ai->issuer,bi->issuer));
  76         }
  77
  78 #ifndef NO_MD5
  79 unsigned long X509_issuer_and_serial_hash(X509 *a)
  80         {
  81         unsigned long ret=0;
  82         MD5_CTX ctx;
  83         unsigned char md[16];
  84         char str[256];
  85
  86         X509_NAME_oneline(a->cert_info->issuer,str,256);
  87         ret=strlen(str);
  88         MD5_Init(&ctx);
  89         MD5_Update(&ctx,(unsigned char *)str,ret);
  90         MD5_Update(&ctx,(unsigned char *)a->cert_info->serialNumber->data,
  91                 (unsigned long)a->cert_info->serialNumber->length);
  92         MD5_Final(&(md[0]),&ctx);
  93         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
  94                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
  95                 )&0xffffffffL;
  96         return(ret);
  97         }
  98 #endif
  99
 100 int X509_issuer_name_cmp(X509 *a, X509 *b)
 101         {
 102         return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer));
 103         }
 104
 105 int X509_subject_name_cmp(X509 *a, X509 *b)
 106         {
 107         return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject));
 108         }
 109
 110 int X509_CRL_cmp(X509_CRL *a, X509_CRL *b)
 111         {
 112         return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer));
 113         }
 114
 115 X509_NAME *X509_get_issuer_name(X509 *a)
 116         {
 117         return(a->cert_info->issuer);
 118         }
 119
 120 unsigned long X509_issuer_name_hash(X509 *x)
 121         {
 122         return(X509_NAME_hash(x->cert_info->issuer));
 123         }
 124
 125 X509_NAME *X509_get_subject_name(X509 *a)
 126         {
 127         return(a->cert_info->subject);
 128         }
 129
 130 ASN1_INTEGER *X509_get_serialNumber(X509 *a)
 131         {
 132         return(a->cert_info->serialNumber);
 133         }
 134
 135 unsigned long X509_subject_name_hash(X509 *x)
 136         {
 137         return(X509_NAME_hash(x->cert_info->subject));
 138         }
 139 /* Compare two certificates: they must be identical for
 140  * this to work.
 141  */
 142 int X509_cmp(X509 *a, X509 *b)
 143 {
 144         /* ensure hash is valid */
 145         X509_check_purpose(a, -1, 0);
 146         X509_check_purpose(b, -1, 0);
 147         return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
 148 }
 149
 150 int X509_NAME_cmp(X509_NAME *a, X509_NAME *b)
 151         {
 152         int i,j;
 153         X509_NAME_ENTRY *na,*nb;
 154
 155         if (sk_X509_NAME_ENTRY_num(a->entries)
 156             != sk_X509_NAME_ENTRY_num(b->entries))
 157                 return sk_X509_NAME_ENTRY_num(a->entries)
 158                   -sk_X509_NAME_ENTRY_num(b->entries);
 159         for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
 160                 {
 161                 na=sk_X509_NAME_ENTRY_value(a->entries,i);
 162                 nb=sk_X509_NAME_ENTRY_value(b->entries,i);
 163                 j=na->value->length-nb->value->length;
 164                 if (j) return(j);
 165                 j=memcmp(na->value->data,nb->value->data,
 166                         na->value->length);
 167                 if (j) return(j);
 168                 j=na->set-nb->set;
 169                 if (j) return(j);
 170                 }
 171
 172         /* We will check the object types after checking the values
 173          * since the values will more often be different than the object
 174          * types. */
 175         for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
 176                 {
 177                 na=sk_X509_NAME_ENTRY_value(a->entries,i);
 178                 nb=sk_X509_NAME_ENTRY_value(b->entries,i);
 179                 j=OBJ_cmp(na->object,nb->object);
 180                 if (j) return(j);
 181                 }
 182         return(0);
 183         }
 184
 185 #ifndef NO_MD5
 186 /* I now DER encode the name and hash it.  Since I cache the DER encoding,
 187  * this is reasonably effiecent. */
 188 unsigned long X509_NAME_hash(X509_NAME *x)
 189         {
 190         unsigned long ret=0;
 191         unsigned char md[16];
 192         unsigned char str[256],*p,*pp;
 193         int i;
 194
 195         i=i2d_X509_NAME(x,NULL);
 196         if (i > sizeof(str))
 197                 p=Malloc(i);
 198         else
 199                 p=str;
 200
 201         pp=p;
 202         i2d_X509_NAME(x,&pp);
 203         MD5((unsigned char *)p,i,&(md[0]));
 204         if (p != str) Free(p);
 205
 206         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
 207                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
 208                 )&0xffffffffL;
 209         return(ret);
 210         }
 211 #endif
 212
 213 /* Search a stack of X509 for a match */
 214 X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
 215                 ASN1_INTEGER *serial)
 216         {
 217         int i;
 218         X509_CINF cinf;
 219         X509 x,*x509=NULL;
 220
 221         if(!sk) return NULL;
 222
 223         x.cert_info= &cinf;
 224         cinf.serialNumber=serial;
 225         cinf.issuer=name;
 226
 227         for (i=0; i<sk_X509_num(sk); i++)
 228                 {
 229                 x509=sk_X509_value(sk,i);
 230                 if (X509_issuer_and_serial_cmp(x509,&x) == 0)
 231                         return(x509);
 232                 }
 233         return(NULL);
 234         }
 235
 236 X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
 237         {
 238         X509 *x509;
 239         int i;
 240
 241         for (i=0; i<sk_X509_num(sk); i++)
 242                 {
 243                 x509=sk_X509_value(sk,i);
 244                 if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
 245                         return(x509);
 246                 }
 247         return(NULL);
 248         }
 249
 250 EVP_PKEY *X509_get_pubkey(X509 *x)
 251         {
 252         if ((x == NULL) || (x->cert_info == NULL))
 253                 return(NULL);
 254         return(X509_PUBKEY_get(x->cert_info->key));
 255         }
 256
 257 int X509_check_private_key(X509 *x, EVP_PKEY *k)
 258         {
 259         EVP_PKEY *xk=NULL;
 260         int ok=0;
 261
 262         xk=X509_get_pubkey(x);
 263         if (xk->type != k->type)
 264             {
 265             X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
 266             goto err;
 267             }
 268         switch (k->type)
 269                 {
 270 #ifndef NO_RSA
 271         case EVP_PKEY_RSA:
 272                 if (BN_cmp(xk->pkey.rsa->n,k->pkey.rsa->n) != 0
 273                     || BN_cmp(xk->pkey.rsa->e,k->pkey.rsa->e) != 0)
 274                     {
 275                     X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
 276                     goto err;
 277                     }
 278                 break;
 279 #endif
 280 #ifndef NO_DSA
 281         case EVP_PKEY_DSA:
 282                 if (BN_cmp(xk->pkey.dsa->pub_key,k->pkey.dsa->pub_key) != 0)
 283                     {
 284                     X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
 285                     goto err;
 286                     }
 287                 break;
 288 #endif
 289 #ifndef NO_DH
 290         case EVP_PKEY_DH:
 291                 /* No idea */
 292                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_CANT_CHECK_DH_KEY);
 293                 goto err;
 294 #endif
 295         default:
 296                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
 297                 goto err;
 298                 }
 299
 300         ok=1;
 301 err:
 302         EVP_PKEY_free(xk);
 303         return(ok);
 304         }