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 <openssl/local/cryptlib.h>
62#include <openssl/asn1.h>
63#include <openssl/objects.h>
64#include <openssl/x509.h>
65#include <openssl/x509v3.h>
66
67int 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
80unsigned 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
104int 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
109int 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
114int 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
120int 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
126X509_NAME *X509_get_issuer_name(X509 *a)
127	{
128	return(a->cert_info->issuer);
129	}
130
131unsigned long X509_issuer_name_hash(X509 *x)
132	{
133	return(X509_NAME_hash(x->cert_info->issuer));
134	}
135
136#ifndef OPENSSL_NO_MD5
137unsigned long X509_issuer_name_hash_old(X509 *x)
138	{
139	return(X509_NAME_hash_old(x->cert_info->issuer));
140	}
141#endif
142
143X509_NAME *X509_get_subject_name(X509 *a)
144	{
145	return(a->cert_info->subject);
146	}
147
148ASN1_INTEGER *X509_get_serialNumber(X509 *a)
149	{
150	return(a->cert_info->serialNumber);
151	}
152
153unsigned long X509_subject_name_hash(X509 *x)
154	{
155	return(X509_NAME_hash(x->cert_info->subject));
156	}
157
158#ifndef OPENSSL_NO_MD5
159unsigned long X509_subject_name_hash_old(X509 *x)
160	{
161	return(X509_NAME_hash_old(x->cert_info->subject));
162	}
163#endif
164
165#ifndef OPENSSL_NO_SHA
166/* Compare two certificates: they must be identical for
167 * this to work. NB: Although "cmp" operations are generally
168 * prototyped to take "const" arguments (eg. for use in
169 * STACKs), the way X509 handling is - these operations may
170 * involve ensuring the hashes are up-to-date and ensuring
171 * certain cert information is cached. So this is the point
172 * where the "depth-first" constification tree has to halt
173 * with an evil cast.
174 */
175int X509_cmp(const X509 *a, const X509 *b)
176{
177	/* ensure hash is valid */
178	X509_check_purpose((X509 *)a, -1, 0);
179	X509_check_purpose((X509 *)b, -1, 0);
180
181	return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
182}
183#endif
184
185
186int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
187	{
188	int ret;
189
190	/* Ensure canonical encoding is present and up to date */
191
192	if (!a->canon_enc || a->modified)
193		{
194		ret = i2d_X509_NAME((X509_NAME *)a, NULL);
195		if (ret < 0)
196			return -2;
197		}
198
199	if (!b->canon_enc || b->modified)
200		{
201		ret = i2d_X509_NAME((X509_NAME *)b, NULL);
202		if (ret < 0)
203			return -2;
204		}
205
206	ret = a->canon_enclen - b->canon_enclen;
207
208	if (ret)
209		return ret;
210
211	return memcmp(a->canon_enc, b->canon_enc, a->canon_enclen);
212
213	}
214
215unsigned long X509_NAME_hash(X509_NAME *x)
216	{
217	unsigned long ret=0;
218	unsigned char md[SHA_DIGEST_LENGTH];
219
220	/* Make sure X509_NAME structure contains valid cached encoding */
221	i2d_X509_NAME(x,NULL);
222	EVP_Digest(x->canon_enc, x->canon_enclen, md, NULL, EVP_sha1(), NULL);
223
224	ret=(	((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
225		((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
226		)&0xffffffffL;
227	return(ret);
228	}
229
230
231#ifndef OPENSSL_NO_MD5
232/* I now DER encode the name and hash it.  Since I cache the DER encoding,
233 * this is reasonably efficient. */
234
235unsigned long X509_NAME_hash_old(X509_NAME *x)
236	{
237	unsigned long ret=0;
238	unsigned char md[16];
239
240	/* Make sure X509_NAME structure contains valid cached encoding */
241	i2d_X509_NAME(x,NULL);
242	EVP_Digest(x->bytes->data, x->bytes->length, md, NULL, EVP_md5(), NULL);
243
244	ret=(	((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
245		((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
246		)&0xffffffffL;
247	return(ret);
248	}
249#endif
250
251/* Search a stack of X509 for a match */
252X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
253		ASN1_INTEGER *serial)
254	{
255	int i;
256	X509_CINF cinf;
257	X509 x,*x509=NULL;
258
259	if(!sk) return NULL;
260
261	x.cert_info= &cinf;
262	cinf.serialNumber=serial;
263	cinf.issuer=name;
264
265	for (i=0; i<sk_X509_num(sk); i++)
266		{
267		x509=sk_X509_value(sk,i);
268		if (X509_issuer_and_serial_cmp(x509,&x) == 0)
269			return(x509);
270		}
271	return(NULL);
272	}
273
274X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
275	{
276	X509 *x509;
277	int i;
278
279	for (i=0; i<sk_X509_num(sk); i++)
280		{
281		x509=sk_X509_value(sk,i);
282		if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
283			return(x509);
284		}
285	return(NULL);
286	}
287
288EVP_PKEY *X509_get_pubkey(X509 *x)
289	{
290	if ((x == NULL) || (x->cert_info == NULL))
291		return(NULL);
292	return(X509_PUBKEY_get(x->cert_info->key));
293	}
294
295ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x)
296	{
297	if(!x) return NULL;
298	return x->cert_info->key->public_key;
299	}
300
301int X509_check_private_key(X509 *x, EVP_PKEY *k)
302	{
303	EVP_PKEY *xk;
304	int ret;
305
306	xk=X509_get_pubkey(x);
307
308	if (xk)
309		ret = EVP_PKEY_cmp(xk, k);
310	else
311		ret = -2;
312
313	switch (ret)
314		{
315	case 1:
316		break;
317	case 0:
318		X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
319		break;
320	case -1:
321		X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
322		break;
323	case -2:
324	        X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
325		}
326	if (xk)
327		EVP_PKEY_free(xk);
328	if (ret > 0)
329		return 1;
330	return 0;
331	}
332