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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 
X509_issuer_and_serial_cmp(const X509 * a,const X509 * b)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
X509_issuer_and_serial_hash(X509 * a)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 	if (!EVP_DigestInit_ex(&ctx, EVP_md5(), NULL))
90 		goto err;
91 	if (!EVP_DigestUpdate(&ctx,(unsigned char *)f,strlen(f)))
92 		goto err;
93 	OPENSSL_free(f);
94 	if(!EVP_DigestUpdate(&ctx,(unsigned char *)a->cert_info->serialNumber->data,
95 		(unsigned long)a->cert_info->serialNumber->length))
96 		goto err;
97 	if (!EVP_DigestFinal_ex(&ctx,&(md[0]),NULL))
98 		goto err;
99 	ret=(	((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
100 		((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
101 		)&0xffffffffL;
102 	err:
103 	EVP_MD_CTX_cleanup(&ctx);
104 	return(ret);
105 	}
106 #endif
107 
X509_issuer_name_cmp(const X509 * a,const X509 * b)108 int X509_issuer_name_cmp(const X509 *a, const X509 *b)
109 	{
110 	return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer));
111 	}
112 
X509_subject_name_cmp(const X509 * a,const X509 * b)113 int X509_subject_name_cmp(const X509 *a, const X509 *b)
114 	{
115 	return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject));
116 	}
117 
X509_CRL_cmp(const X509_CRL * a,const X509_CRL * b)118 int X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b)
119 	{
120 	return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer));
121 	}
122 
123 #ifndef OPENSSL_NO_SHA
X509_CRL_match(const X509_CRL * a,const X509_CRL * b)124 int X509_CRL_match(const X509_CRL *a, const X509_CRL *b)
125 	{
126 	return memcmp(a->sha1_hash, b->sha1_hash, 20);
127 	}
128 #endif
129 
X509_get_issuer_name(X509 * a)130 X509_NAME *X509_get_issuer_name(X509 *a)
131 	{
132 	return(a->cert_info->issuer);
133 	}
134 
X509_issuer_name_hash(X509 * x)135 unsigned long X509_issuer_name_hash(X509 *x)
136 	{
137 	return(X509_NAME_hash(x->cert_info->issuer));
138 	}
139 
140 #ifndef OPENSSL_NO_MD5
X509_issuer_name_hash_old(X509 * x)141 unsigned long X509_issuer_name_hash_old(X509 *x)
142 	{
143 	return(X509_NAME_hash_old(x->cert_info->issuer));
144 	}
145 #endif
146 
X509_get_subject_name(X509 * a)147 X509_NAME *X509_get_subject_name(X509 *a)
148 	{
149 	return(a->cert_info->subject);
150 	}
151 
X509_get_serialNumber(X509 * a)152 ASN1_INTEGER *X509_get_serialNumber(X509 *a)
153 	{
154 	return(a->cert_info->serialNumber);
155 	}
156 
X509_subject_name_hash(X509 * x)157 unsigned long X509_subject_name_hash(X509 *x)
158 	{
159 	return(X509_NAME_hash(x->cert_info->subject));
160 	}
161 
162 #ifndef OPENSSL_NO_MD5
X509_subject_name_hash_old(X509 * x)163 unsigned long X509_subject_name_hash_old(X509 *x)
164 	{
165 	return(X509_NAME_hash_old(x->cert_info->subject));
166 	}
167 #endif
168 
169 #ifndef OPENSSL_NO_SHA
170 /* Compare two certificates: they must be identical for
171  * this to work. NB: Although "cmp" operations are generally
172  * prototyped to take "const" arguments (eg. for use in
173  * STACKs), the way X509 handling is - these operations may
174  * involve ensuring the hashes are up-to-date and ensuring
175  * certain cert information is cached. So this is the point
176  * where the "depth-first" constification tree has to halt
177  * with an evil cast.
178  */
X509_cmp(const X509 * a,const X509 * b)179 int X509_cmp(const X509 *a, const X509 *b)
180 {
181 	/* ensure hash is valid */
182 	X509_check_purpose((X509 *)a, -1, 0);
183 	X509_check_purpose((X509 *)b, -1, 0);
184 
185 	return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
186 }
187 #endif
188 
189 
X509_NAME_cmp(const X509_NAME * a,const X509_NAME * b)190 int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
191 	{
192 	int ret;
193 
194 	/* Ensure canonical encoding is present and up to date */
195 
196 	if (!a->canon_enc || a->modified)
197 		{
198 		ret = i2d_X509_NAME((X509_NAME *)a, NULL);
199 		if (ret < 0)
200 			return -2;
201 		}
202 
203 	if (!b->canon_enc || b->modified)
204 		{
205 		ret = i2d_X509_NAME((X509_NAME *)b, NULL);
206 		if (ret < 0)
207 			return -2;
208 		}
209 
210 	ret = a->canon_enclen - b->canon_enclen;
211 
212 	if (ret)
213 		return ret;
214 
215 	return memcmp(a->canon_enc, b->canon_enc, a->canon_enclen);
216 
217 	}
218 
X509_NAME_hash(X509_NAME * x)219 unsigned long X509_NAME_hash(X509_NAME *x)
220 	{
221 	unsigned long ret=0;
222 	unsigned char md[SHA_DIGEST_LENGTH];
223 
224 	/* Make sure X509_NAME structure contains valid cached encoding */
225 	i2d_X509_NAME(x,NULL);
226 	if (!EVP_Digest(x->canon_enc, x->canon_enclen, md, NULL, EVP_sha1(),
227 		NULL))
228 		return 0;
229 
230 	ret=(	((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
231 		((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
232 		)&0xffffffffL;
233 	return(ret);
234 	}
235 
236 
237 #ifndef OPENSSL_NO_MD5
238 /* I now DER encode the name and hash it.  Since I cache the DER encoding,
239  * this is reasonably efficient. */
240 
X509_NAME_hash_old(X509_NAME * x)241 unsigned long X509_NAME_hash_old(X509_NAME *x)
242 	{
243 	EVP_MD_CTX md_ctx;
244 	unsigned long ret=0;
245 	unsigned char md[16];
246 
247 	/* Make sure X509_NAME structure contains valid cached encoding */
248 	i2d_X509_NAME(x,NULL);
249 	EVP_MD_CTX_init(&md_ctx);
250 	EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
251 	if (EVP_DigestInit_ex(&md_ctx, EVP_md5(), NULL)
252 	    && EVP_DigestUpdate(&md_ctx, x->bytes->data, x->bytes->length)
253 	    && EVP_DigestFinal_ex(&md_ctx,md,NULL))
254 		ret=(((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
255 		     ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
256 		     )&0xffffffffL;
257 	EVP_MD_CTX_cleanup(&md_ctx);
258 
259 	return(ret);
260 	}
261 #endif
262 
263 /* Search a stack of X509 for a match */
X509_find_by_issuer_and_serial(STACK_OF (X509)* sk,X509_NAME * name,ASN1_INTEGER * serial)264 X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
265 		ASN1_INTEGER *serial)
266 	{
267 	int i;
268 	X509_CINF cinf;
269 	X509 x,*x509=NULL;
270 
271 	if(!sk) return NULL;
272 
273 	x.cert_info= &cinf;
274 	cinf.serialNumber=serial;
275 	cinf.issuer=name;
276 
277 	for (i=0; i<sk_X509_num(sk); i++)
278 		{
279 		x509=sk_X509_value(sk,i);
280 		if (X509_issuer_and_serial_cmp(x509,&x) == 0)
281 			return(x509);
282 		}
283 	return(NULL);
284 	}
285 
X509_find_by_subject(STACK_OF (X509)* sk,X509_NAME * name)286 X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
287 	{
288 	X509 *x509;
289 	int i;
290 
291 	for (i=0; i<sk_X509_num(sk); i++)
292 		{
293 		x509=sk_X509_value(sk,i);
294 		if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
295 			return(x509);
296 		}
297 	return(NULL);
298 	}
299 
X509_get_pubkey(X509 * x)300 EVP_PKEY *X509_get_pubkey(X509 *x)
301 	{
302 	if ((x == NULL) || (x->cert_info == NULL))
303 		return(NULL);
304 	return(X509_PUBKEY_get(x->cert_info->key));
305 	}
306 
X509_get0_pubkey_bitstr(const X509 * x)307 ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x)
308 	{
309 	if(!x) return NULL;
310 	return x->cert_info->key->public_key;
311 	}
312 
X509_check_private_key(X509 * x,EVP_PKEY * k)313 int X509_check_private_key(X509 *x, EVP_PKEY *k)
314 	{
315 	EVP_PKEY *xk;
316 	int ret;
317 
318 	xk=X509_get_pubkey(x);
319 
320 	if (xk)
321 		ret = EVP_PKEY_cmp(xk, k);
322 	else
323 		ret = -2;
324 
325 	switch (ret)
326 		{
327 	case 1:
328 		break;
329 	case 0:
330 		X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
331 		break;
332 	case -1:
333 		X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
334 		break;
335 	case -2:
336 	        X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
337 		}
338 	if (xk)
339 		EVP_PKEY_free(xk);
340 	if (ret > 0)
341 		return 1;
342 	return 0;
343 	}
344