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
 140 #ifndef NO_SHA
 141 /* Compare two certificates: they must be identical for
 142  * this to work.
 143  */
 144 int X509_cmp(X509 *a, X509 *b)
 145 {
 146         /* ensure hash is valid */
 147         X509_check_purpose(a, -1, 0);
 148         X509_check_purpose(b, -1, 0);
 149
 150         return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
 151 }
 152 #endif
 153
 154 int X509_NAME_cmp(X509_NAME *a, X509_NAME *b)
 155         {
 156         int i,j;
 157         X509_NAME_ENTRY *na,*nb;
 158
 159         if (sk_X509_NAME_ENTRY_num(a->entries)
 160             != sk_X509_NAME_ENTRY_num(b->entries))
 161                 return sk_X509_NAME_ENTRY_num(a->entries)
 162                   -sk_X509_NAME_ENTRY_num(b->entries);
 163         for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
 164                 {
 165                 na=sk_X509_NAME_ENTRY_value(a->entries,i);
 166                 nb=sk_X509_NAME_ENTRY_value(b->entries,i);
 167                 j=na->value->length-nb->value->length;
 168                 if (j) return(j);
 169                 j=memcmp(na->value->data,nb->value->data,
 170                         na->value->length);
 171                 if (j) return(j);
 172                 j=na->set-nb->set;
 173                 if (j) return(j);
 174                 }
 175
 176         /* We will check the object types after checking the values
 177          * since the values will more often be different than the object
 178          * types. */
 179         for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
 180                 {
 181                 na=sk_X509_NAME_ENTRY_value(a->entries,i);
 182                 nb=sk_X509_NAME_ENTRY_value(b->entries,i);
 183                 j=OBJ_cmp(na->object,nb->object);
 184                 if (j) return(j);
 185                 }
 186         return(0);
 187         }
 188
 189 #ifndef NO_MD5
 190 /* I now DER encode the name and hash it.  Since I cache the DER encoding,
 191  * this is reasonably effiecent. */
 192 unsigned long X509_NAME_hash(X509_NAME *x)
 193         {
 194         unsigned long ret=0;
 195         unsigned char md[16];
 196         unsigned char str[256],*p,*pp;
 197         int i;
 198
 199         i=i2d_X509_NAME(x,NULL);
 200         if (i > sizeof(str))
 201                 p=Malloc(i);
 202         else
 203                 p=str;
 204
 205         pp=p;
 206         i2d_X509_NAME(x,&pp);
 207         MD5((unsigned char *)p,i,&(md[0]));
 208         if (p != str) Free(p);
 209
 210         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
 211                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
 212                 )&0xffffffffL;
 213         return(ret);
 214         }
 215 #endif
 216
 217 /* Search a stack of X509 for a match */
 218 X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
 219                 ASN1_INTEGER *serial)
 220         {
 221         int i;
 222         X509_CINF cinf;
 223         X509 x,*x509=NULL;
 224
 225         if(!sk) return NULL;
 226
 227         x.cert_info= &cinf;
 228         cinf.serialNumber=serial;
 229         cinf.issuer=name;
 230
 231         for (i=0; i<sk_X509_num(sk); i++)
 232                 {
 233                 x509=sk_X509_value(sk,i);
 234                 if (X509_issuer_and_serial_cmp(x509,&x) == 0)
 235                         return(x509);
 236                 }
 237         return(NULL);
 238         }
 239
 240 X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
 241         {
 242         X509 *x509;
 243         int i;
 244
 245         for (i=0; i<sk_X509_num(sk); i++)
 246                 {
 247                 x509=sk_X509_value(sk,i);
 248                 if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
 249                         return(x509);
 250                 }
 251         return(NULL);
 252         }
 253
 254 EVP_PKEY *X509_get_pubkey(X509 *x)
 255         {
 256         if ((x == NULL) || (x->cert_info == NULL))
 257                 return(NULL);
 258         return(X509_PUBKEY_get(x->cert_info->key));
 259         }
 260
 261 int X509_check_private_key(X509 *x, EVP_PKEY *k)
 262         {
 263         EVP_PKEY *xk=NULL;
 264         int ok=0;
 265
 266         xk=X509_get_pubkey(x);
 267         if (xk->type != k->type)
 268             {
 269             X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
 270             goto err;
 271             }
 272         switch (k->type)
 273                 {
 274 #ifndef NO_RSA
 275         case EVP_PKEY_RSA:
 276                 if (BN_cmp(xk->pkey.rsa->n,k->pkey.rsa->n) != 0
 277                     || BN_cmp(xk->pkey.rsa->e,k->pkey.rsa->e) != 0)
 278                     {
 279                     X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
 280                     goto err;
 281                     }
 282                 break;
 283 #endif
 284 #ifndef NO_DSA
 285         case EVP_PKEY_DSA:
 286                 if (BN_cmp(xk->pkey.dsa->pub_key,k->pkey.dsa->pub_key) != 0)
 287                     {
 288                     X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
 289                     goto err;
 290                     }
 291                 break;
 292 #endif
 293 #ifndef NO_DH
 294         case EVP_PKEY_DH:
 295                 /* No idea */
 296                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_CANT_CHECK_DH_KEY);
 297                 goto err;
 298 #endif
 299         default:
 300                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
 301                 goto err;
 302                 }
 303
 304         ok=1;
 305 err:
 306         EVP_PKEY_free(xk);
 307         return(ok);
 308         }