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(const X509 *a, const 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 OPENSSL_NO_MD5
  79 unsigned long X509_issuer_and_serial_hash(X509 *a)
  80         {
  81         unsigned long ret=0;
  82         EVP_MD_CTX ctx;
  83         unsigned char md[16];
  84         char str[256];
  85
  86         EVP_MD_CTX_init(&ctx);
  87         X509_NAME_oneline(a->cert_info->issuer,str,256);
  88         ret=strlen(str);
  89         EVP_DigestInit_ex(&ctx, EVP_md5(), NULL);
  90         EVP_DigestUpdate(&ctx,(unsigned char *)str,ret);
  91         EVP_DigestUpdate(&ctx,(unsigned char *)a->cert_info->serialNumber->data,
  92                 (unsigned long)a->cert_info->serialNumber->length);
  93         EVP_DigestFinal_ex(&ctx,&(md[0]),NULL);
  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         EVP_MD_CTX_cleanup(&ctx);
  98         return(ret);
  99         }
 100 #endif
 101
 102 int X509_issuer_name_cmp(const X509 *a, const X509 *b)
 103         {
 104         return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer));
 105         }
 106
 107 int X509_subject_name_cmp(const X509 *a, const X509 *b)
 108         {
 109         return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject));
 110         }
 111
 112 int X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b)
 113         {
 114         return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer));
 115         }
 116
 117 X509_NAME *X509_get_issuer_name(X509 *a)
 118         {
 119         return(a->cert_info->issuer);
 120         }
 121
 122 unsigned long X509_issuer_name_hash(X509 *x)
 123         {
 124         return(X509_NAME_hash(x->cert_info->issuer));
 125         }
 126
 127 X509_NAME *X509_get_subject_name(X509 *a)
 128         {
 129         return(a->cert_info->subject);
 130         }
 131
 132 ASN1_INTEGER *X509_get_serialNumber(X509 *a)
 133         {
 134         return(a->cert_info->serialNumber);
 135         }
 136
 137 unsigned long X509_subject_name_hash(X509 *x)
 138         {
 139         return(X509_NAME_hash(x->cert_info->subject));
 140         }
 141
 142 #ifndef OPENSSL_NO_SHA
 143 /* Compare two certificates: they must be identical for
 144  * this to work. NB: Although "cmp" operations are generally
 145  * prototyped to take "const" arguments (eg. for use in
 146  * STACKs), the way X509 handling is - these operations may
 147  * involve ensuring the hashes are up-to-date and ensuring
 148  * certain cert information is cached. So this is the point
 149  * where the "depth-first" constification tree has to halt
 150  * with an evil cast.
 151  */
 152 int X509_cmp(const X509 *a, const X509 *b)
 153 {
 154         /* ensure hash is valid */
 155         X509_check_purpose((X509 *)a, -1, 0);
 156         X509_check_purpose((X509 *)b, -1, 0);
 157
 158         return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
 159 }
 160 #endif
 161
 162 int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
 163         {
 164         int i,j;
 165         X509_NAME_ENTRY *na,*nb;
 166
 167         if (sk_X509_NAME_ENTRY_num(a->entries)
 168             != sk_X509_NAME_ENTRY_num(b->entries))
 169                 return sk_X509_NAME_ENTRY_num(a->entries)
 170                   -sk_X509_NAME_ENTRY_num(b->entries);
 171         for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
 172                 {
 173                 na=sk_X509_NAME_ENTRY_value(a->entries,i);
 174                 nb=sk_X509_NAME_ENTRY_value(b->entries,i);
 175                 j=na->value->length-nb->value->length;
 176                 if (j) return(j);
 177                 j=memcmp(na->value->data,nb->value->data,
 178                         na->value->length);
 179                 if (j) return(j);
 180                 j=na->set-nb->set;
 181                 if (j) return(j);
 182                 }
 183
 184         /* We will check the object types after checking the values
 185          * since the values will more often be different than the object
 186          * types. */
 187         for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
 188                 {
 189                 na=sk_X509_NAME_ENTRY_value(a->entries,i);
 190                 nb=sk_X509_NAME_ENTRY_value(b->entries,i);
 191                 j=OBJ_cmp(na->object,nb->object);
 192                 if (j) return(j);
 193                 }
 194         return(0);
 195         }
 196
 197 #ifndef OPENSSL_NO_MD5
 198 /* I now DER encode the name and hash it.  Since I cache the DER encoding,
 199  * this is reasonably efficient. */
 200 unsigned long X509_NAME_hash(X509_NAME *x)
 201         {
 202         unsigned long ret=0;
 203         unsigned char md[16];
 204
 205         /* Make sure X509_NAME structure contains valid cached encoding */
 206         i2d_X509_NAME(x,NULL);
 207         EVP_Digest(x->bytes->data, x->bytes->length, md, NULL, EVP_md5(), NULL);
 208
 209         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
 210                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
 211                 )&0xffffffffL;
 212         return(ret);
 213         }
 214 #endif
 215
 216 /* Search a stack of X509 for a match */
 217 X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
 218                 ASN1_INTEGER *serial)
 219         {
 220         int i;
 221         X509_CINF cinf;
 222         X509 x,*x509=NULL;
 223
 224         if(!sk) return NULL;
 225
 226         x.cert_info= &cinf;
 227         cinf.serialNumber=serial;
 228         cinf.issuer=name;
 229
 230         for (i=0; i<sk_X509_num(sk); i++)
 231                 {
 232                 x509=sk_X509_value(sk,i);
 233                 if (X509_issuer_and_serial_cmp(x509,&x) == 0)
 234                         return(x509);
 235                 }
 236         return(NULL);
 237         }
 238
 239 X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
 240         {
 241         X509 *x509;
 242         int i;
 243
 244         for (i=0; i<sk_X509_num(sk); i++)
 245                 {
 246                 x509=sk_X509_value(sk,i);
 247                 if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
 248                         return(x509);
 249                 }
 250         return(NULL);
 251         }
 252
 253 EVP_PKEY *X509_get_pubkey(X509 *x)
 254         {
 255         if ((x == NULL) || (x->cert_info == NULL))
 256                 return(NULL);
 257         return(X509_PUBKEY_get(x->cert_info->key));
 258         }
 259
 260 ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x)
 261         {
 262         if(!x) return NULL;
 263         return x->cert_info->key->public_key;
 264         }
 265
 266 int X509_check_private_key(X509 *x, EVP_PKEY *k)
 267         {
 268         EVP_PKEY *xk=NULL;
 269         int ok=0;
 270
 271         xk=X509_get_pubkey(x);
 272         if (xk->type != k->type)
 273             {
 274             X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
 275             goto err;
 276             }
 277         switch (k->type)
 278                 {
 279 #ifndef OPENSSL_NO_RSA
 280         case EVP_PKEY_RSA:
 281                 if (BN_cmp(xk->pkey.rsa->n,k->pkey.rsa->n) != 0
 282                     || BN_cmp(xk->pkey.rsa->e,k->pkey.rsa->e) != 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 OPENSSL_NO_DSA
 290         case EVP_PKEY_DSA:
 291                 if (BN_cmp(xk->pkey.dsa->pub_key,k->pkey.dsa->pub_key) != 0)
 292                     {
 293                     X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
 294                     goto err;
 295                     }
 296                 break;
 297 #endif
 298 #ifndef OPENSSL_NO_EC
 299         case EVP_PKEY_EC:
 300                 {
 301                 int  r = EC_POINT_cmp(xk->pkey.eckey->group,
 302                         xk->pkey.eckey->pub_key,k->pkey.eckey->pub_key,NULL);
 303                 if (r != 0)
 304                         {
 305                         if (r == 1)
 306                                 X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_KEY_VALUES_MISMATCH);
 307                         else
 308                                 X509err(X509_F_X509_CHECK_PRIVATE_KEY, ERR_R_EC_LIB);
 309
 310                         goto err;
 311                         }
 312                 }
 313                 break;
 314 #endif
 315 #ifndef OPENSSL_NO_DH
 316         case EVP_PKEY_DH:
 317                 /* No idea */
 318                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_CANT_CHECK_DH_KEY);
 319                 goto err;
 320 #endif
 321         default:
 322                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
 323                 goto err;
 324                 }
 325
 326         ok=1;
 327 err:
 328         EVP_PKEY_free(xk);
 329         return(ok);
 330         }