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 <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         ret=strlen(f);
  90         EVP_DigestInit_ex(&ctx, EVP_md5(), NULL);
  91         EVP_DigestUpdate(&ctx,(unsigned char *)f,ret);
  92         OPENSSL_free(f);
  93         EVP_DigestUpdate(&ctx,(unsigned char *)a->cert_info->serialNumber->data,
  94                 (unsigned long)a->cert_info->serialNumber->length);
  95         EVP_DigestFinal_ex(&ctx,&(md[0]),NULL);
  96         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
  97                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
  98                 )&0xffffffffL;
  99         EVP_MD_CTX_cleanup(&ctx);
 100         return(ret);
 101         }
 102 #endif
 103
 104 int X509_issuer_name_cmp(const X509 *a, const X509 *b)
 105         {
 106         return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer));
 107         }
 108
 109 int X509_subject_name_cmp(const X509 *a, const X509 *b)
 110         {
 111         return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject));
 112         }
 113
 114 int X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b)
 115         {
 116         return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer));
 117         }
 118
 119 #ifndef OPENSSL_NO_SHA
 120 int X509_CRL_match(const X509_CRL *a, const X509_CRL *b)
 121         {
 122         return memcmp(a->sha1_hash, b->sha1_hash, 20);
 123         }
 124 #endif
 125
 126 X509_NAME *X509_get_issuer_name(X509 *a)
 127         {
 128         return(a->cert_info->issuer);
 129         }
 130
 131 unsigned long X509_issuer_name_hash(X509 *x)
 132         {
 133         return(X509_NAME_hash(x->cert_info->issuer));
 134         }
 135
 136 X509_NAME *X509_get_subject_name(X509 *a)
 137         {
 138         return(a->cert_info->subject);
 139         }
 140
 141 ASN1_INTEGER *X509_get_serialNumber(X509 *a)
 142         {
 143         return(a->cert_info->serialNumber);
 144         }
 145
 146 unsigned long X509_subject_name_hash(X509 *x)
 147         {
 148         return(X509_NAME_hash(x->cert_info->subject));
 149         }
 150
 151 #ifndef OPENSSL_NO_SHA
 152 /* Compare two certificates: they must be identical for
 153  * this to work. NB: Although "cmp" operations are generally
 154  * prototyped to take "const" arguments (eg. for use in
 155  * STACKs), the way X509 handling is - these operations may
 156  * involve ensuring the hashes are up-to-date and ensuring
 157  * certain cert information is cached. So this is the point
 158  * where the "depth-first" constification tree has to halt
 159  * with an evil cast.
 160  */
 161 int X509_cmp(const X509 *a, const X509 *b)
 162 {
 163         /* ensure hash is valid */
 164         X509_check_purpose((X509 *)a, -1, 0);
 165         X509_check_purpose((X509 *)b, -1, 0);
 166
 167         return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
 168 }
 169 #endif
 170
 171
 172 int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
 173         {
 174         int ret;
 175
 176         /* Ensure canonical encoding is present */
 177
 178         if (!a->canon_enc)
 179                 {
 180                 ret = i2d_X509_NAME((X509_NAME *)a, NULL);
 181                 if (ret < 0)
 182                         return -2;
 183                 }
 184
 185         if (!b->canon_enc)
 186                 {
 187                 ret = i2d_X509_NAME((X509_NAME *)b, NULL);
 188                 if (ret < 0)
 189                         return -2;
 190                 }
 191
 192         ret = a->canon_enclen - b->canon_enclen;
 193
 194         if (ret)
 195                 return ret;
 196
 197         return memcmp(a->canon_enc, b->canon_enc, a->canon_enclen);
 198
 199         }
 200
 201
 202 #ifndef OPENSSL_NO_MD5
 203 /* I now DER encode the name and hash it.  Since I cache the DER encoding,
 204  * this is reasonably efficient. */
 205 unsigned long X509_NAME_hash(X509_NAME *x)
 206         {
 207         unsigned long ret=0;
 208         unsigned char md[16];
 209
 210         /* Make sure X509_NAME structure contains valid cached encoding */
 211         i2d_X509_NAME(x,NULL);
 212         EVP_Digest(x->bytes->data, x->bytes->length, md, NULL, EVP_md5(), NULL);
 213
 214         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
 215                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
 216                 )&0xffffffffL;
 217         return(ret);
 218         }
 219 #endif
 220
 221 /* Search a stack of X509 for a match */
 222 X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
 223                 ASN1_INTEGER *serial)
 224         {
 225         int i;
 226         X509_CINF cinf;
 227         X509 x,*x509=NULL;
 228
 229         if(!sk) return NULL;
 230
 231         x.cert_info= &cinf;
 232         cinf.serialNumber=serial;
 233         cinf.issuer=name;
 234
 235         for (i=0; i<sk_X509_num(sk); i++)
 236                 {
 237                 x509=sk_X509_value(sk,i);
 238                 if (X509_issuer_and_serial_cmp(x509,&x) == 0)
 239                         return(x509);
 240                 }
 241         return(NULL);
 242         }
 243
 244 X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
 245         {
 246         X509 *x509;
 247         int i;
 248
 249         for (i=0; i<sk_X509_num(sk); i++)
 250                 {
 251                 x509=sk_X509_value(sk,i);
 252                 if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
 253                         return(x509);
 254                 }
 255         return(NULL);
 256         }
 257
 258 EVP_PKEY *X509_get_pubkey(X509 *x)
 259         {
 260         if ((x == NULL) || (x->cert_info == NULL))
 261                 return(NULL);
 262         return(X509_PUBKEY_get(x->cert_info->key));
 263         }
 264
 265 ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x)
 266         {
 267         if(!x) return NULL;
 268         return x->cert_info->key->public_key;
 269         }
 270
 271 int X509_check_private_key(X509 *x, EVP_PKEY *k)
 272         {
 273         EVP_PKEY *xk;
 274         int ret;
 275
 276         xk=X509_get_pubkey(x);
 277
 278         if (xk)
 279                 ret = EVP_PKEY_cmp(xk, k);
 280         else
 281                 ret = -2;
 282
 283         switch (ret)
 284                 {
 285         case 1:
 286                 break;
 287         case 0:
 288                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
 289                 break;
 290         case -1:
 291                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
 292                 break;
 293         case -2:
 294                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
 295                 }
 296         if (xk)
 297                 EVP_PKEY_free(xk);
 298         if (ret > 0)
 299                 return 1;
 300         return 0;
 301         }