1 /* $OpenBSD: x509_cmp.c,v 1.35 2019/03/13 20:34:00 tb Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
63 #include <openssl/opensslconf.h>
65 #include <openssl/asn1.h>
66 #include <openssl/err.h>
67 #include <openssl/objects.h>
68 #include <openssl/x509.h>
69 #include <openssl/x509v3.h>
72 X509_issuer_and_serial_cmp(const X509 *a, const X509 *b)
79 i = ASN1_INTEGER_cmp(ai->serialNumber, bi->serialNumber);
82 return (X509_NAME_cmp(ai->issuer, bi->issuer));
85 #ifndef OPENSSL_NO_MD5
87 X509_issuer_and_serial_hash(X509 *a)
89 unsigned long ret = 0;
94 EVP_MD_CTX_init(&ctx);
95 f = X509_NAME_oneline(a->cert_info->issuer, NULL, 0);
98 if (!EVP_DigestInit_ex(&ctx, EVP_md5(), NULL))
100 if (!EVP_DigestUpdate(&ctx, (unsigned char *)f, strlen(f)))
104 if (!EVP_DigestUpdate(&ctx,
105 (unsigned char *)a->cert_info->serialNumber->data,
106 (unsigned long)a->cert_info->serialNumber->length))
108 if (!EVP_DigestFinal_ex(&ctx, &(md[0]), NULL))
110 ret = (((unsigned long)md[0]) | ((unsigned long)md[1] << 8L) |
111 ((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L)) &
115 EVP_MD_CTX_cleanup(&ctx);
122 X509_issuer_name_cmp(const X509 *a, const X509 *b)
124 return (X509_NAME_cmp(a->cert_info->issuer, b->cert_info->issuer));
128 X509_subject_name_cmp(const X509 *a, const X509 *b)
130 return (X509_NAME_cmp(a->cert_info->subject, b->cert_info->subject));
134 X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b)
136 return (X509_NAME_cmp(a->crl->issuer, b->crl->issuer));
139 #ifndef OPENSSL_NO_SHA
141 X509_CRL_match(const X509_CRL *a, const X509_CRL *b)
143 return memcmp(a->sha1_hash, b->sha1_hash, 20);
148 X509_get_issuer_name(const X509 *a)
150 return (a->cert_info->issuer);
154 X509_issuer_name_hash(X509 *x)
156 return (X509_NAME_hash(x->cert_info->issuer));
159 #ifndef OPENSSL_NO_MD5
161 X509_issuer_name_hash_old(X509 *x)
163 return (X509_NAME_hash_old(x->cert_info->issuer));
168 X509_get_subject_name(const X509 *a)
170 return (a->cert_info->subject);
174 X509_get_serialNumber(X509 *a)
176 return (a->cert_info->serialNumber);
180 X509_get0_serialNumber(const X509 *a)
182 return (a->cert_info->serialNumber);
186 X509_subject_name_hash(X509 *x)
188 return (X509_NAME_hash(x->cert_info->subject));
191 #ifndef OPENSSL_NO_MD5
193 X509_subject_name_hash_old(X509 *x)
195 return (X509_NAME_hash_old(x->cert_info->subject));
199 #ifndef OPENSSL_NO_SHA
200 /* Compare two certificates: they must be identical for
201 * this to work. NB: Although "cmp" operations are generally
202 * prototyped to take "const" arguments (eg. for use in
203 * STACKs), the way X509 handling is - these operations may
204 * involve ensuring the hashes are up-to-date and ensuring
205 * certain cert information is cached. So this is the point
206 * where the "depth-first" constification tree has to halt
210 X509_cmp(const X509 *a, const X509 *b)
212 /* ensure hash is valid */
213 X509_check_purpose((X509 *)a, -1, 0);
214 X509_check_purpose((X509 *)b, -1, 0);
216 return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
221 X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
225 /* Ensure canonical encoding is present and up to date */
226 if (!a->canon_enc || a->modified) {
227 ret = i2d_X509_NAME((X509_NAME *)a, NULL);
231 if (!b->canon_enc || b->modified) {
232 ret = i2d_X509_NAME((X509_NAME *)b, NULL);
236 ret = a->canon_enclen - b->canon_enclen;
239 return memcmp(a->canon_enc, b->canon_enc, a->canon_enclen);
243 X509_NAME_hash(X509_NAME *x)
245 unsigned long ret = 0;
246 unsigned char md[SHA_DIGEST_LENGTH];
248 /* Make sure X509_NAME structure contains valid cached encoding */
249 i2d_X509_NAME(x, NULL);
250 if (!EVP_Digest(x->canon_enc, x->canon_enclen, md, NULL, EVP_sha1(),
254 ret = (((unsigned long)md[0]) | ((unsigned long)md[1] << 8L) |
255 ((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L)) &
261 #ifndef OPENSSL_NO_MD5
262 /* I now DER encode the name and hash it. Since I cache the DER encoding,
263 * this is reasonably efficient. */
266 X509_NAME_hash_old(X509_NAME *x)
269 unsigned long ret = 0;
270 unsigned char md[16];
272 /* Make sure X509_NAME structure contains valid cached encoding */
273 i2d_X509_NAME(x, NULL);
274 EVP_MD_CTX_init(&md_ctx);
275 if (EVP_DigestInit_ex(&md_ctx, EVP_md5(), NULL) &&
276 EVP_DigestUpdate(&md_ctx, x->bytes->data, x->bytes->length) &&
277 EVP_DigestFinal_ex(&md_ctx, md, NULL))
278 ret = (((unsigned long)md[0]) |
279 ((unsigned long)md[1] << 8L) |
280 ((unsigned long)md[2] << 16L) |
281 ((unsigned long)md[3] << 24L)) &
283 EVP_MD_CTX_cleanup(&md_ctx);
289 /* Search a stack of X509 for a match */
291 X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
292 ASN1_INTEGER *serial)
296 X509 x, *x509 = NULL;
302 cinf.serialNumber = serial;
305 for (i = 0; i < sk_X509_num(sk); i++) {
306 x509 = sk_X509_value(sk, i);
307 if (X509_issuer_and_serial_cmp(x509, &x) == 0)
314 X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
319 for (i = 0; i < sk_X509_num(sk); i++) {
320 x509 = sk_X509_value(sk, i);
321 if (X509_NAME_cmp(X509_get_subject_name(x509), name) == 0)
328 X509_get_pubkey(X509 *x)
330 if (x == NULL || x->cert_info == NULL)
332 return (X509_PUBKEY_get(x->cert_info->key));
336 X509_get0_pubkey(const X509 *x)
338 if (x == NULL || x->cert_info == NULL)
340 return (X509_PUBKEY_get0(x->cert_info->key));
344 X509_get0_pubkey_bitstr(const X509 *x)
348 return x->cert_info->key->public_key;
352 X509_check_private_key(const X509 *x, const EVP_PKEY *k)
357 xk = X509_get0_pubkey(x);
360 ret = EVP_PKEY_cmp(xk, k);
368 X509error(X509_R_KEY_VALUES_MISMATCH);
371 X509error(X509_R_KEY_TYPE_MISMATCH);
374 X509error(X509_R_UNKNOWN_KEY_TYPE);
382 * Not strictly speaking an "up_ref" as a STACK doesn't have a reference
383 * count but it has the same effect by duping the STACK and upping the ref of
384 * each X509 structure.
387 X509_chain_up_ref(STACK_OF(X509) *chain)
392 ret = sk_X509_dup(chain);
393 for (i = 0; i < sk_X509_num(ret); i++)
394 X509_up_ref(sk_X509_value(ret, i));