412 lines
11 KiB
C
412 lines
11 KiB
C
/* crypto/x509/x509_cmp.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <ctype.h>
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#include "cryptlib.h"
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#include <openssl/asn1.h>
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#include <openssl/objects.h>
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#include <openssl/x509.h>
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#include <openssl/x509v3.h>
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int X509_issuer_and_serial_cmp(const X509 *a, const X509 *b)
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{
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int i;
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X509_CINF *ai,*bi;
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ai=a->cert_info;
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bi=b->cert_info;
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i=M_ASN1_INTEGER_cmp(ai->serialNumber,bi->serialNumber);
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if (i) return(i);
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return(X509_NAME_cmp(ai->issuer,bi->issuer));
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}
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#ifndef NO_MD5
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unsigned long X509_issuer_and_serial_hash(X509 *a)
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{
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unsigned long ret=0;
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MD5_CTX ctx;
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unsigned char md[16];
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char str[256];
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X509_NAME_oneline(a->cert_info->issuer,str,256);
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ret=strlen(str);
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MD5_Init(&ctx);
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MD5_Update(&ctx,(unsigned char *)str,ret);
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MD5_Update(&ctx,(unsigned char *)a->cert_info->serialNumber->data,
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(unsigned long)a->cert_info->serialNumber->length);
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MD5_Final(&(md[0]),&ctx);
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ret=( ((unsigned long)md[0] )|((unsigned long)md[1]<<8L)|
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((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
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)&0xffffffffL;
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return(ret);
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}
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#endif
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int X509_issuer_name_cmp(const X509 *a, const X509 *b)
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{
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return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer));
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}
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int X509_subject_name_cmp(const X509 *a, const X509 *b)
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{
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return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject));
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}
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int X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b)
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{
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return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer));
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}
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X509_NAME *X509_get_issuer_name(X509 *a)
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{
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return(a->cert_info->issuer);
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}
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unsigned long X509_issuer_name_hash(X509 *x)
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{
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return(X509_NAME_hash(x->cert_info->issuer));
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}
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X509_NAME *X509_get_subject_name(X509 *a)
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{
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return(a->cert_info->subject);
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}
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ASN1_INTEGER *X509_get_serialNumber(X509 *a)
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{
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return(a->cert_info->serialNumber);
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}
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unsigned long X509_subject_name_hash(X509 *x)
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{
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return(X509_NAME_hash(x->cert_info->subject));
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}
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#ifndef NO_SHA
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/* Compare two certificates: they must be identical for
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* this to work. NB: Although "cmp" operations are generally
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* prototyped to take "const" arguments (eg. for use in
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* STACKs), the way X509 handling is - these operations may
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* involve ensuring the hashes are up-to-date and ensuring
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* certain cert information is cached. So this is the point
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* where the "depth-first" constification tree has to halt
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* with an evil cast.
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*/
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int X509_cmp(const X509 *a, const X509 *b)
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{
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/* ensure hash is valid */
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X509_check_purpose((X509 *)a, -1, 0);
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X509_check_purpose((X509 *)b, -1, 0);
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return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
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}
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#endif
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/* Case insensitive string comparision */
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static int nocase_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
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{
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int i;
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if (a->length != b->length)
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return (a->length - b->length);
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for (i=0; i<a->length; i++)
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{
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int ca, cb;
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ca = tolower(a->data[i]);
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cb = tolower(b->data[i]);
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if (ca != cb)
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return(ca-cb);
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}
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return 0;
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}
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/* Case insensitive string comparision with space normalization
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* Space normalization - ignore leading, trailing spaces,
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* multiple spaces between characters are replaced by single space
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*/
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static int nocase_spacenorm_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
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{
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unsigned char *pa = NULL, *pb = NULL;
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int la, lb;
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la = a->length;
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lb = b->length;
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pa = a->data;
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pb = b->data;
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/* skip leading spaces */
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while (la > 0 && isspace(*pa))
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{
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la--;
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pa++;
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}
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while (lb > 0 && isspace(*pb))
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{
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lb--;
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pb++;
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}
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/* skip trailing spaces */
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while (la > 0 && isspace(pa[la-1]))
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la--;
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while (lb > 0 && isspace(pb[lb-1]))
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lb--;
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/* compare strings with space normalization */
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while (la > 0 && lb > 0)
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{
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int ca, cb;
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/* compare character */
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ca = tolower(*pa);
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cb = tolower(*pb);
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if (ca != cb)
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return (ca - cb);
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pa++; pb++;
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la--; lb--;
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if (la <= 0 || lb <= 0)
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break;
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/* is white space next character ? */
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if (isspace(*pa) && isspace(*pb))
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{
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/* skip remaining white spaces */
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while (la > 0 && isspace(*pa))
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{
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la--;
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pa++;
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}
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while (lb > 0 && isspace(*pb))
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{
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lb--;
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pb++;
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}
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}
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}
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if (la > 0 || lb > 0)
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return la - lb;
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return 0;
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}
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int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
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{
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int i,j;
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X509_NAME_ENTRY *na,*nb;
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if (sk_X509_NAME_ENTRY_num(a->entries)
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!= sk_X509_NAME_ENTRY_num(b->entries))
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return sk_X509_NAME_ENTRY_num(a->entries)
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-sk_X509_NAME_ENTRY_num(b->entries);
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for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
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{
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na=sk_X509_NAME_ENTRY_value(a->entries,i);
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nb=sk_X509_NAME_ENTRY_value(b->entries,i);
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j=na->value->type-nb->value->type;
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if (j) return(j);
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if (na->value->type == V_ASN1_PRINTABLESTRING)
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j=nocase_spacenorm_cmp(na->value, nb->value);
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else if (na->value->type == V_ASN1_IA5STRING
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&& OBJ_obj2nid(na->object) == NID_pkcs9_emailAddress)
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j=nocase_cmp(na->value, nb->value);
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else
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{
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j=na->value->length-nb->value->length;
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if (j) return(j);
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j=memcmp(na->value->data,nb->value->data,
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na->value->length);
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}
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if (j) return(j);
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j=na->set-nb->set;
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if (j) return(j);
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}
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/* We will check the object types after checking the values
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* since the values will more often be different than the object
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* types. */
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for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
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{
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na=sk_X509_NAME_ENTRY_value(a->entries,i);
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nb=sk_X509_NAME_ENTRY_value(b->entries,i);
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j=OBJ_cmp(na->object,nb->object);
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if (j) return(j);
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}
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return(0);
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}
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#ifndef NO_MD5
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/* I now DER encode the name and hash it. Since I cache the DER encoding,
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* this is reasonably efficient. */
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unsigned long X509_NAME_hash(X509_NAME *x)
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{
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unsigned long ret=0;
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unsigned char md[16];
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/* Ensure cached version is up to date */
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i2d_X509_NAME(x,NULL);
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/* Use cached encoding directly rather than copying: this should
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* keep libsafe happy.
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*/
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MD5((unsigned char *)x->bytes->data,x->bytes->length,&(md[0]));
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ret=( ((unsigned long)md[0] )|((unsigned long)md[1]<<8L)|
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((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
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)&0xffffffffL;
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return(ret);
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}
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#endif
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/* Search a stack of X509 for a match */
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X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
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ASN1_INTEGER *serial)
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{
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int i;
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X509_CINF cinf;
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X509 x,*x509=NULL;
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if(!sk) return NULL;
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x.cert_info= &cinf;
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cinf.serialNumber=serial;
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cinf.issuer=name;
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for (i=0; i<sk_X509_num(sk); i++)
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{
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x509=sk_X509_value(sk,i);
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if (X509_issuer_and_serial_cmp(x509,&x) == 0)
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return(x509);
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}
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return(NULL);
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}
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X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
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{
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X509 *x509;
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int i;
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for (i=0; i<sk_X509_num(sk); i++)
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{
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x509=sk_X509_value(sk,i);
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if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
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return(x509);
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}
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return(NULL);
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}
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EVP_PKEY *X509_get_pubkey(X509 *x)
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{
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if ((x == NULL) || (x->cert_info == NULL))
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return(NULL);
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return(X509_PUBKEY_get(x->cert_info->key));
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}
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int X509_check_private_key(X509 *x, EVP_PKEY *k)
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{
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EVP_PKEY *xk=NULL;
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int ok=0;
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xk=X509_get_pubkey(x);
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if (xk->type != k->type)
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{
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X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
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goto err;
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}
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switch (k->type)
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{
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#ifndef NO_RSA
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case EVP_PKEY_RSA:
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if (BN_cmp(xk->pkey.rsa->n,k->pkey.rsa->n) != 0
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|| BN_cmp(xk->pkey.rsa->e,k->pkey.rsa->e) != 0)
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{
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X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
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goto err;
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}
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break;
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#endif
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#ifndef NO_DSA
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case EVP_PKEY_DSA:
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if (BN_cmp(xk->pkey.dsa->pub_key,k->pkey.dsa->pub_key) != 0)
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{
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X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
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goto err;
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}
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break;
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#endif
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#ifndef NO_DH
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case EVP_PKEY_DH:
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/* No idea */
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X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_CANT_CHECK_DH_KEY);
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goto err;
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#endif
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default:
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X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
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goto err;
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}
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ok=1;
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err:
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EVP_PKEY_free(xk);
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return(ok);
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}
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