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[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 <sys/types.h>
61 #include <sys/stat.h>
62 #include "cryptlib.h"
63 #include "asn1.h"
64 #include "objects.h"
65 #include "x509.h"
66
67 int X509_issuer_and_serial_cmp(a,b)
68 X509 *a;
69 X509 *b;
70         {
71         int i;
72         X509_CINF *ai,*bi;
73
74         ai=a->cert_info;
75         bi=b->cert_info;
76         i=ASN1_INTEGER_cmp(ai->serialNumber,bi->serialNumber);
77         if (i) return(i);
78         return(X509_NAME_cmp(ai->issuer,bi->issuer));
79         }
80
81 #ifndef NO_MD5
82 unsigned long X509_issuer_and_serial_hash(a)
83 X509 *a;
84         {
85         unsigned long ret=0;
86         MD5_CTX ctx;
87         unsigned char md[16];
88         char str[256];
89
90         X509_NAME_oneline(a->cert_info->issuer,str,256);
91         ret=strlen(str);
92         MD5_Init(&ctx);
93         MD5_Update(&ctx,(unsigned char *)str,ret);
94         MD5_Update(&ctx,(unsigned char *)a->cert_info->serialNumber->data,
95                 (unsigned long)a->cert_info->serialNumber->length);
96         MD5_Final(&(md[0]),&ctx);
97         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
98                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
99                 )&0xffffffffL;
100         return(ret);
101         }
102 #endif
103         
104 int X509_issuer_name_cmp(a, b)
105 X509 *a;
106 X509 *b;
107         {
108         return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer));
109         }
110
111 int X509_subject_name_cmp(a, b)
112 X509 *a;
113 X509 *b;
114         {
115         return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject));
116         }
117
118 int X509_CRL_cmp(a, b)
119 X509_CRL *a;
120 X509_CRL *b;
121         {
122         return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer));
123         }
124
125 X509_NAME *X509_get_issuer_name(a)
126 X509 *a;
127         {
128         return(a->cert_info->issuer);
129         }
130
131 unsigned long X509_issuer_name_hash(x)
132 X509 *x;
133         {
134         return(X509_NAME_hash(x->cert_info->issuer));
135         }
136
137 X509_NAME *X509_get_subject_name(a)
138 X509 *a;
139         {
140         return(a->cert_info->subject);
141         }
142
143 ASN1_INTEGER *X509_get_serialNumber(a)
144 X509 *a;
145         {
146         return(a->cert_info->serialNumber);
147         }
148
149 unsigned long X509_subject_name_hash(x)
150 X509 *x;
151         {
152         return(X509_NAME_hash(x->cert_info->subject));
153         }
154
155 int X509_NAME_cmp(a, b)
156 X509_NAME *a;
157 X509_NAME *b;
158         {
159         int i,j;
160         X509_NAME_ENTRY *na,*nb;
161
162         if (sk_num(a->entries) != sk_num(b->entries))
163                 return(sk_num(a->entries)-sk_num(b->entries));
164         for (i=sk_num(a->entries)-1; i>=0; i--)
165                 {
166                 na=(X509_NAME_ENTRY *)sk_value(a->entries,i);
167                 nb=(X509_NAME_ENTRY *)sk_value(b->entries,i);
168                 j=na->value->length-nb->value->length;
169                 if (j) return(j);
170                 j=memcmp(na->value->data,nb->value->data,
171                         na->value->length);
172                 if (j) return(j);
173                 j=na->set-nb->set;
174                 if (j) return(j);
175                 }
176
177         /* We will check the object types after checking the values
178          * since the values will more often be different than the object
179          * types. */
180         for (i=sk_num(a->entries)-1; i>=0; i--)
181                 {
182                 na=(X509_NAME_ENTRY *)sk_value(a->entries,i);
183                 nb=(X509_NAME_ENTRY *)sk_value(b->entries,i);
184                 j=OBJ_cmp(na->object,nb->object);
185                 if (j) return(j);
186                 }
187         return(0);
188         }
189
190 #ifndef NO_MD5
191 /* I now DER encode the name and hash it.  Since I cache the DER encoding,
192  * this is reasonably effiecent. */
193 unsigned long X509_NAME_hash(x)
194 X509_NAME *x;
195         {
196         unsigned long ret=0;
197         unsigned char md[16];
198         unsigned char str[256],*p,*pp;
199         int i;
200
201         i=i2d_X509_NAME(x,NULL);
202         if (i > sizeof(str))
203                 p=Malloc(i);
204         else
205                 p=str;
206
207         pp=p;
208         i2d_X509_NAME(x,&pp);
209         MD5((unsigned char *)p,i,&(md[0]));
210         if (p != str) Free(p);
211
212         ret=(   ((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
213                 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
214                 )&0xffffffffL;
215         return(ret);
216         }
217 #endif
218
219 /* Search a stack of X509 for a match */
220 X509 *X509_find_by_issuer_and_serial(sk,name,serial)
221 STACK *sk;
222 X509_NAME *name;
223 ASN1_INTEGER *serial;
224         {
225         int i;
226         X509_CINF cinf;
227         X509 x,*x509=NULL;
228
229         x.cert_info= &cinf;
230         cinf.serialNumber=serial;
231         cinf.issuer=name;
232
233         for (i=0; i<sk_num(sk); i++)
234                 {
235                 x509=(X509 *)sk_value(sk,i);
236                 if (X509_issuer_and_serial_cmp(x509,&x) == 0)
237                         return(x509);
238                 }
239         return(NULL);
240         }
241
242 X509 *X509_find_by_subject(sk,name)
243 STACK *sk;
244 X509_NAME *name;
245         {
246         X509 *x509;
247         int i;
248
249         for (i=0; i<sk_num(sk); i++)
250                 {
251                 x509=(X509 *)sk_value(sk,i);
252                 if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
253                         return(x509);
254                 }
255         return(NULL);
256         }
257