Fix for d2i_ASN1_bytes and stop PKCS#7 routines crashing is signed message
[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
65 int X509_issuer_and_serial_cmp(X509 *a, X509 *b)
66         {
67         int i;
68         X509_CINF *ai,*bi;
69
70         ai=a->cert_info;
71         bi=b->cert_info;
72         i=ASN1_INTEGER_cmp(ai->serialNumber,bi->serialNumber);
73         if (i) return(i);
74         return(X509_NAME_cmp(ai->issuer,bi->issuer));
75         }
76
77 #ifndef NO_MD5
78 unsigned long X509_issuer_and_serial_hash(X509 *a)
79         {
80         unsigned long ret=0;
81         MD5_CTX ctx;
82         unsigned char md[16];
83         char str[256];
84
85         X509_NAME_oneline(a->cert_info->issuer,str,256);
86         ret=strlen(str);
87         MD5_Init(&ctx);
88         MD5_Update(&ctx,(unsigned char *)str,ret);
89         MD5_Update(&ctx,(unsigned char *)a->cert_info->serialNumber->data,
90                 (unsigned long)a->cert_info->serialNumber->length);
91         MD5_Final(&(md[0]),&ctx);
92         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
93                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
94                 )&0xffffffffL;
95         return(ret);
96         }
97 #endif
98         
99 int X509_issuer_name_cmp(X509 *a, X509 *b)
100         {
101         return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer));
102         }
103
104 int X509_subject_name_cmp(X509 *a, X509 *b)
105         {
106         return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject));
107         }
108
109 int X509_CRL_cmp(X509_CRL *a, X509_CRL *b)
110         {
111         return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer));
112         }
113
114 X509_NAME *X509_get_issuer_name(X509 *a)
115         {
116         return(a->cert_info->issuer);
117         }
118
119 unsigned long X509_issuer_name_hash(X509 *x)
120         {
121         return(X509_NAME_hash(x->cert_info->issuer));
122         }
123
124 X509_NAME *X509_get_subject_name(X509 *a)
125         {
126         return(a->cert_info->subject);
127         }
128
129 ASN1_INTEGER *X509_get_serialNumber(X509 *a)
130         {
131         return(a->cert_info->serialNumber);
132         }
133
134 unsigned long X509_subject_name_hash(X509 *x)
135         {
136         return(X509_NAME_hash(x->cert_info->subject));
137         }
138
139 int X509_NAME_cmp(X509_NAME *a, X509_NAME *b)
140         {
141         int i,j;
142         X509_NAME_ENTRY *na,*nb;
143
144         if (sk_X509_NAME_ENTRY_num(a->entries)
145             != sk_X509_NAME_ENTRY_num(b->entries))
146                 return sk_X509_NAME_ENTRY_num(a->entries)
147                   -sk_X509_NAME_ENTRY_num(b->entries);
148         for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
149                 {
150                 na=sk_X509_NAME_ENTRY_value(a->entries,i);
151                 nb=sk_X509_NAME_ENTRY_value(b->entries,i);
152                 j=na->value->length-nb->value->length;
153                 if (j) return(j);
154                 j=memcmp(na->value->data,nb->value->data,
155                         na->value->length);
156                 if (j) return(j);
157                 j=na->set-nb->set;
158                 if (j) return(j);
159                 }
160
161         /* We will check the object types after checking the values
162          * since the values will more often be different than the object
163          * types. */
164         for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
165                 {
166                 na=sk_X509_NAME_ENTRY_value(a->entries,i);
167                 nb=sk_X509_NAME_ENTRY_value(b->entries,i);
168                 j=OBJ_cmp(na->object,nb->object);
169                 if (j) return(j);
170                 }
171         return(0);
172         }
173
174 #ifndef NO_MD5
175 /* I now DER encode the name and hash it.  Since I cache the DER encoding,
176  * this is reasonably effiecent. */
177 unsigned long X509_NAME_hash(X509_NAME *x)
178         {
179         unsigned long ret=0;
180         unsigned char md[16];
181         unsigned char str[256],*p,*pp;
182         int i;
183
184         i=i2d_X509_NAME(x,NULL);
185         if (i > sizeof(str))
186                 p=Malloc(i);
187         else
188                 p=str;
189
190         pp=p;
191         i2d_X509_NAME(x,&pp);
192         MD5((unsigned char *)p,i,&(md[0]));
193         if (p != str) Free(p);
194
195         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
196                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
197                 )&0xffffffffL;
198         return(ret);
199         }
200 #endif
201
202 /* Search a stack of X509 for a match */
203 X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
204                 ASN1_INTEGER *serial)
205         {
206         int i;
207         X509_CINF cinf;
208         X509 x,*x509=NULL;
209
210         if(!sk) return NULL;
211
212         x.cert_info= &cinf;
213         cinf.serialNumber=serial;
214         cinf.issuer=name;
215
216         for (i=0; i<sk_X509_num(sk); i++)
217                 {
218                 x509=sk_X509_value(sk,i);
219                 if (X509_issuer_and_serial_cmp(x509,&x) == 0)
220                         return(x509);
221                 }
222         return(NULL);
223         }
224
225 X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
226         {
227         X509 *x509;
228         int i;
229
230         for (i=0; i<sk_X509_num(sk); i++)
231                 {
232                 x509=sk_X509_value(sk,i);
233                 if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
234                         return(x509);
235                 }
236         return(NULL);
237         }
238
239 EVP_PKEY *X509_get_pubkey(X509 *x)
240         {
241         if ((x == NULL) || (x->cert_info == NULL))
242                 return(NULL);
243         return(X509_PUBKEY_get(x->cert_info->key));
244         }
245
246 int X509_check_private_key(X509 *x, EVP_PKEY *k)
247         {
248         EVP_PKEY *xk=NULL;
249         int ok=0;
250
251         xk=X509_get_pubkey(x);
252         if (xk->type != k->type)
253             {
254             X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
255             goto err;
256             }
257         switch (k->type)
258                 {
259 #ifndef NO_RSA
260         case EVP_PKEY_RSA:
261                 if (BN_cmp(xk->pkey.rsa->n,k->pkey.rsa->n) != 0
262                     || BN_cmp(xk->pkey.rsa->e,k->pkey.rsa->e) != 0)
263                     {
264                     X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
265                     goto err;
266                     }
267                 break;
268 #endif
269 #ifndef NO_DSA
270         case EVP_PKEY_DSA:
271                 if (BN_cmp(xk->pkey.dsa->pub_key,k->pkey.dsa->pub_key) != 0)
272                     {
273                     X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
274                     goto err;
275                     }
276                 break;
277 #endif
278 #ifndef NO_DH
279         case EVP_PKEY_DH:
280                 /* No idea */
281                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_CANT_CHECK_DH_KEY);
282                 goto err;
283 #endif
284         default:
285                 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
286                 goto err;
287                 }
288
289         ok=1;
290 err:
291         EVP_PKEY_free(xk);
292         return(ok);
293         }