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