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
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	if (!EVP_DigestInit_ex(&ctx, EVP_md5(), NULL))
91		goto err;
92	if (!EVP_DigestUpdate(&ctx,(unsigned char *)f,ret))
93		goto err;
94	OPENSSL_free(f);
95	if(!EVP_DigestUpdate(&ctx,(unsigned char *)a->cert_info->serialNumber->data,
96		(unsigned long)a->cert_info->serialNumber->length))
97		goto err;
98	if (!EVP_DigestFinal_ex(&ctx,&(md[0]),NULL))
99		goto err;
100	ret=(	((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
101		((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
102		)&0xffffffffL;
103	err:
104	EVP_MD_CTX_cleanup(&ctx);
105	return(ret);
106	}
107#endif
108
109int X509_issuer_name_cmp(const X509 *a, const X509 *b)
110	{
111	return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer));
112	}
113
114int X509_subject_name_cmp(const X509 *a, const X509 *b)
115	{
116	return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject));
117	}
118
119int X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b)
120	{
121	return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer));
122	}
123
124#ifndef OPENSSL_NO_SHA
125int X509_CRL_match(const X509_CRL *a, const X509_CRL *b)
126	{
127	return memcmp(a->sha1_hash, b->sha1_hash, 20);
128	}
129#endif
130
131X509_NAME *X509_get_issuer_name(X509 *a)
132	{
133	return(a->cert_info->issuer);
134	}
135
136unsigned long X509_issuer_name_hash(X509 *x)
137	{
138	return(X509_NAME_hash(x->cert_info->issuer));
139	}
140
141#ifndef OPENSSL_NO_MD5
142unsigned long X509_issuer_name_hash_old(X509 *x)
143	{
144	return(X509_NAME_hash_old(x->cert_info->issuer));
145	}
146#endif
147
148X509_NAME *X509_get_subject_name(X509 *a)
149	{
150	return(a->cert_info->subject);
151	}
152
153ASN1_INTEGER *X509_get_serialNumber(X509 *a)
154	{
155	return(a->cert_info->serialNumber);
156	}
157
158unsigned long X509_subject_name_hash(X509 *x)
159	{
160	return(X509_NAME_hash(x->cert_info->subject));
161	}
162
163#ifndef OPENSSL_NO_MD5
164unsigned long X509_subject_name_hash_old(X509 *x)
165	{
166	return(X509_NAME_hash_old(x->cert_info->subject));
167	}
168#endif
169
170#ifndef OPENSSL_NO_SHA
171/* Compare two certificates: they must be identical for
172 * this to work. NB: Although "cmp" operations are generally
173 * prototyped to take "const" arguments (eg. for use in
174 * STACKs), the way X509 handling is - these operations may
175 * involve ensuring the hashes are up-to-date and ensuring
176 * certain cert information is cached. So this is the point
177 * where the "depth-first" constification tree has to halt
178 * with an evil cast.
179 */
180int X509_cmp(const X509 *a, const X509 *b)
181{
182	/* ensure hash is valid */
183	X509_check_purpose((X509 *)a, -1, 0);
184	X509_check_purpose((X509 *)b, -1, 0);
185
186	return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
187}
188#endif
189
190
191int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
192	{
193	int ret;
194
195	/* Ensure canonical encoding is present and up to date */
196
197	if (!a->canon_enc || a->modified)
198		{
199		ret = i2d_X509_NAME((X509_NAME *)a, NULL);
200		if (ret < 0)
201			return -2;
202		}
203
204	if (!b->canon_enc || b->modified)
205		{
206		ret = i2d_X509_NAME((X509_NAME *)b, NULL);
207		if (ret < 0)
208			return -2;
209		}
210
211	ret = a->canon_enclen - b->canon_enclen;
212
213	if (ret)
214		return ret;
215
216	return memcmp(a->canon_enc, b->canon_enc, a->canon_enclen);
217
218	}
219
220unsigned long X509_NAME_hash(X509_NAME *x)
221	{
222	unsigned long ret=0;
223	unsigned char md[SHA_DIGEST_LENGTH];
224
225	/* Make sure X509_NAME structure contains valid cached encoding */
226	i2d_X509_NAME(x,NULL);
227	if (!EVP_Digest(x->canon_enc, x->canon_enclen, md, NULL, EVP_sha1(),
228		NULL))
229		return 0;
230
231	ret=(	((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
232		((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
233		)&0xffffffffL;
234	return(ret);
235	}
236
237
238#ifndef OPENSSL_NO_MD5
239/* I now DER encode the name and hash it.  Since I cache the DER encoding,
240 * this is reasonably efficient. */
241
242unsigned long X509_NAME_hash_old(X509_NAME *x)
243	{
244	EVP_MD_CTX md_ctx;
245	unsigned long ret=0;
246	unsigned char md[16];
247
248	/* Make sure X509_NAME structure contains valid cached encoding */
249	i2d_X509_NAME(x,NULL);
250	EVP_MD_CTX_init(&md_ctx);
251	EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
252	EVP_DigestInit_ex(&md_ctx, EVP_md5(), NULL);
253	EVP_DigestUpdate(&md_ctx, x->bytes->data, x->bytes->length);
254	EVP_DigestFinal_ex(&md_ctx,md,NULL);
255	EVP_MD_CTX_cleanup(&md_ctx);
256
257	ret=(	((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
258		((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
259		)&0xffffffffL;
260	return(ret);
261	}
262#endif
263
264/* Search a stack of X509 for a match */
265X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
266		ASN1_INTEGER *serial)
267	{
268	int i;
269	X509_CINF cinf;
270	X509 x,*x509=NULL;
271
272	if(!sk) return NULL;
273
274	x.cert_info= &cinf;
275	cinf.serialNumber=serial;
276	cinf.issuer=name;
277
278	for (i=0; i<sk_X509_num(sk); i++)
279		{
280		x509=sk_X509_value(sk,i);
281		if (X509_issuer_and_serial_cmp(x509,&x) == 0)
282			return(x509);
283		}
284	return(NULL);
285	}
286
287X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
288	{
289	X509 *x509;
290	int i;
291
292	for (i=0; i<sk_X509_num(sk); i++)
293		{
294		x509=sk_X509_value(sk,i);
295		if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
296			return(x509);
297		}
298	return(NULL);
299	}
300
301EVP_PKEY *X509_get_pubkey(X509 *x)
302	{
303	if ((x == NULL) || (x->cert_info == NULL))
304		return(NULL);
305	return(X509_PUBKEY_get(x->cert_info->key));
306	}
307
308ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x)
309	{
310	if(!x) return NULL;
311	return x->cert_info->key->public_key;
312	}
313
314int X509_check_private_key(X509 *x, EVP_PKEY *k)
315	{
316	EVP_PKEY *xk;
317	int ret;
318
319	xk=X509_get_pubkey(x);
320
321	if (xk)
322		ret = EVP_PKEY_cmp(xk, k);
323	else
324		ret = -2;
325
326	switch (ret)
327		{
328	case 1:
329		break;
330	case 0:
331		X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
332		break;
333	case -1:
334		X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
335		break;
336	case -2:
337	        X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
338		}
339	if (xk)
340		EVP_PKEY_free(xk);
341	if (ret > 0)
342		return 1;
343	return 0;
344	}
345