415e5f3863aa26d6b1333efe51f570acf629bf9f
[openssl.git] / crypto / x509 / x509_cmp.c
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 "cryptlib.h"
61 #include <openssl/asn1.h>
62 #include <openssl/objects.h>
63 #include <openssl/x509.h>
64 #include <openssl/x509v3.h>
65
66 int X509_issuer_and_serial_cmp(const X509 *a, const X509 *b)
67         {
68         int i;
69         X509_CINF *ai,*bi;
70
71         ai=a->cert_info;
72         bi=b->cert_info;
73         i=M_ASN1_INTEGER_cmp(ai->serialNumber,bi->serialNumber);
74         if (i) return(i);
75         return(X509_NAME_cmp(ai->issuer,bi->issuer));
76         }
77
78 #ifndef OPENSSL_NO_MD5
79 unsigned long X509_issuer_and_serial_hash(X509 *a)
80         {
81         unsigned long ret=0;
82         EVP_MD_CTX ctx;
83         unsigned char md[16];
84         char str[256];
85
86         EVP_MD_CTX_init(&ctx);
87         X509_NAME_oneline(a->cert_info->issuer,str,256);
88         ret=strlen(str);
89         EVP_DigestInit_ex(&ctx, EVP_md5(), NULL);
90         EVP_DigestUpdate(&ctx,(unsigned char *)str,ret);
91         EVP_DigestUpdate(&ctx,(unsigned char *)a->cert_info->serialNumber->data,
92                 (unsigned long)a->cert_info->serialNumber->length);
93         EVP_DigestFinal_ex(&ctx,&(md[0]),NULL);
94         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
95                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
96                 )&0xffffffffL;
97         EVP_MD_CTX_cleanup(&ctx);
98         return(ret);
99         }
100 #endif
101         
102 int X509_issuer_name_cmp(const X509 *a, const X509 *b)
103         {
104         return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer));
105         }
106
107 int X509_subject_name_cmp(const X509 *a, const X509 *b)
108         {
109         return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject));
110         }
111
112 int X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b)
113         {
114         return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer));
115         }
116
117 X509_NAME *X509_get_issuer_name(X509 *a)
118         {
119         return(a->cert_info->issuer);
120         }
121
122 unsigned long X509_issuer_name_hash(X509 *x)
123         {
124         return(X509_NAME_hash(x->cert_info->issuer));
125         }
126
127 X509_NAME *X509_get_subject_name(X509 *a)
128         {
129         return(a->cert_info->subject);
130         }
131
132 ASN1_INTEGER *X509_get_serialNumber(X509 *a)
133         {
134         return(a->cert_info->serialNumber);
135         }
136
137 unsigned long X509_subject_name_hash(X509 *x)
138         {
139         return(X509_NAME_hash(x->cert_info->subject));
140         }
141
142 #ifndef OPENSSL_NO_SHA
143 /* Compare two certificates: they must be identical for
144  * this to work. NB: Although "cmp" operations are generally
145  * prototyped to take "const" arguments (eg. for use in
146  * STACKs), the way X509 handling is - these operations may
147  * involve ensuring the hashes are up-to-date and ensuring
148  * certain cert information is cached. So this is the point
149  * where the "depth-first" constification tree has to halt
150  * with an evil cast.
151  */
152 int X509_cmp(const X509 *a, const X509 *b)
153 {
154         /* ensure hash is valid */
155         X509_check_purpose((X509 *)a, -1, 0);
156         X509_check_purpose((X509 *)b, -1, 0);
157
158         return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
159 }
160 #endif
161
162 int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
163         {
164         int i,j;
165         X509_NAME_ENTRY *na,*nb;
166
167         if (sk_X509_NAME_ENTRY_num(a->entries)
168             != sk_X509_NAME_ENTRY_num(b->entries))
169                 return sk_X509_NAME_ENTRY_num(a->entries)
170                   -sk_X509_NAME_ENTRY_num(b->entries);
171         for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
172                 {
173                 na=sk_X509_NAME_ENTRY_value(a->entries,i);
174                 nb=sk_X509_NAME_ENTRY_value(b->entries,i);
175                 j=na->value->length-nb->value->length;
176                 if (j) return(j);
177                 j=memcmp(na->value->data,nb->value->data,
178                         na->value->length);
179                 if (j) return(j);
180                 j=na->set-nb->set;
181                 if (j) return(j);
182                 }
183
184         /* We will check the object types after checking the values
185          * since the values will more often be different than the object
186          * types. */
187         for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
188                 {
189                 na=sk_X509_NAME_ENTRY_value(a->entries,i);
190                 nb=sk_X509_NAME_ENTRY_value(b->entries,i);
191                 j=OBJ_cmp(na->object,nb->object);
192                 if (j) return(j);
193                 }
194         return(0);
195         }
196
197 #ifndef OPENSSL_NO_MD5
198 /* I now DER encode the name and hash it.  Since I cache the DER encoding,
199  * this is reasonably efficient. */
200 unsigned long X509_NAME_hash(X509_NAME *x)
201         {
202         unsigned long ret=0;
203         unsigned char md[16];
204
205         /* Make sure X509_NAME structure contains valid cached encoding */
206         i2d_X509_NAME(x,NULL);
207         EVP_Digest(x->bytes->data, x->bytes->length, md, NULL, EVP_md5(), NULL);
208
209         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
210                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
211                 )&0xffffffffL;
212         return(ret);
213         }
214 #endif
215
216 /* Search a stack of X509 for a match */
217 X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
218                 ASN1_INTEGER *serial)
219         {
220         int i;
221         X509_CINF cinf;
222         X509 x,*x509=NULL;
223
224         if(!sk) return NULL;
225
226         x.cert_info= &cinf;
227         cinf.serialNumber=serial;
228         cinf.issuer=name;
229
230         for (i=0; i<sk_X509_num(sk); i++)
231                 {
232                 x509=sk_X509_value(sk,i);
233                 if (X509_issuer_and_serial_cmp(x509,&x) == 0)
234                         return(x509);
235                 }
236         return(NULL);
237         }
238
239 X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
240         {
241         X509 *x509;
242         int i;
243
244         for (i=0; i<sk_X509_num(sk); i++)
245                 {
246                 x509=sk_X509_value(sk,i);
247                 if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
248                         return(x509);
249                 }
250         return(NULL);
251         }
252
253 EVP_PKEY *X509_get_pubkey(X509 *x)
254         {
255         if ((x == NULL) || (x->cert_info == NULL))
256                 return(NULL);
257         return(X509_PUBKEY_get(x->cert_info->key));
258         }
259
260 ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x)
261         {
262         if(!x) return NULL;
263         return x->cert_info->key->public_key;
264         }
265
266 int X509_check_private_key(X509 *x, EVP_PKEY *k)
267         {
268         EVP_PKEY *xk=NULL;
269         int ok=0;
270
271         xk=X509_get_pubkey(x);
272         if (xk->type != k->type)
273             {
274             X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
275             goto err;
276             }
277         switch (k->type)
278                 {
279 #ifndef OPENSSL_NO_RSA
280         case EVP_PKEY_RSA:
281                 if (BN_cmp(xk->pkey.rsa->n,k->pkey.rsa->n) != 0
282                     || BN_cmp(xk->pkey.rsa->e,k->pkey.rsa->e) != 0)
283                     {
284                     X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
285                     goto err;
286                     }
287                 break;
288 #endif
289 #ifndef OPENSSL_NO_DSA
290         case EVP_PKEY_DSA:
291                 if (BN_cmp(xk->pkey.dsa->pub_key,k->pkey.dsa->pub_key) != 0)
292                     {
293                     X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
294                     goto err;
295                     }
296                 break;
297 #endif
298 #ifndef OPENSSL_NO_EC
299         case EVP_PKEY_EC:
300                 {
301                 int  r = EC_POINT_cmp(xk->pkey.eckey->group, 
302                         xk->pkey.eckey->pub_key,k->pkey.eckey->pub_key,NULL);
303                 if (r != 0)
304                         {
305                         if (r == 1)
306                                 X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_KEY_VALUES_MISMATCH);
307                         else
308                                 X509err(X509_F_X509_CHECK_PRIVATE_KEY, ERR_R_EC_LIB);
309                         
310                         goto err;
311                         }
312                 }
313                 break;
314 #endif
315 #ifndef OPENSSL_NO_DH
316         case EVP_PKEY_DH:
317                 /* No idea */
318                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_CANT_CHECK_DH_KEY);
319                 goto err;
320 #endif
321         default:
322                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
323                 goto err;
324                 }
325
326         ok=1;
327 err:
328         EVP_PKEY_free(xk);
329         return(ok);
330         }