Change #include filenames from <foo.h> to <openssl.h>.
[openssl.git] / crypto / x509 / by_dir.c
1 /* crypto/x509/by_dir.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 <time.h>
61 #include <errno.h>
62 #include <sys/types.h>
63 #include <sys/stat.h>
64
65 #include "cryptlib.h"
66 #include <openssl/lhash.h>
67 #include <openssl/x509.h>
68
69 typedef struct lookup_dir_st
70         {
71         BUF_MEM *buffer;
72         int num_dirs;
73         char **dirs;
74         int *dirs_type;
75         int num_dirs_alloced;
76         } BY_DIR;
77
78 #ifndef NOPROTO
79 static int dir_ctrl(X509_LOOKUP *ctx,int cmd,char *argp,long argl,char **ret);
80 static int new_dir(X509_LOOKUP *lu);
81 static void free_dir(X509_LOOKUP *lu);
82 static int add_cert_dir(BY_DIR *ctx,const char *dir,int type);
83 static int get_cert_by_subject(X509_LOOKUP *xl,int type,X509_NAME *name,
84         X509_OBJECT *ret);
85 #else
86 static int dir_ctrl();
87 static int new_dir();
88 static void free_dir();
89 static int add_cert_dir();
90 static int get_cert_by_subject();
91 #endif
92
93 X509_LOOKUP_METHOD x509_dir_lookup=
94         {
95         "Load certs from files in a directory",
96         new_dir,                /* new */
97         free_dir,               /* free */
98         NULL,                   /* init */
99         NULL,                   /* shutdown */
100         dir_ctrl,               /* ctrl */
101         get_cert_by_subject,    /* get_by_subject */
102         NULL,                   /* get_by_issuer_serial */
103         NULL,                   /* get_by_fingerprint */
104         NULL,                   /* get_by_alias */
105         };
106
107 X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
108         {
109         return(&x509_dir_lookup);
110         }
111
112 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, char *argp, long argl,
113              char **retp)
114         {
115         int ret=0;
116         BY_DIR *ld;
117         char *dir;
118
119         ld=(BY_DIR *)ctx->method_data;
120
121         switch (cmd)
122                 {
123         case X509_L_ADD_DIR:
124                 if (argl == X509_FILETYPE_DEFAULT)
125                         {
126                         ret=add_cert_dir(ld,X509_get_default_cert_dir(),
127                                 X509_FILETYPE_PEM);
128                         if (!ret)
129                                 {
130                                 X509err(X509_F_DIR_CTRL,X509_R_LOADING_CERT_DIR);
131                                 }
132                         else
133                                 {
134                                 dir=(char *)Getenv(X509_get_default_cert_dir_env());
135                                 ret=add_cert_dir(ld,dir,X509_FILETYPE_PEM);
136                                 }
137                         }
138                 else
139                         ret=add_cert_dir(ld,argp,(int)argl);
140                 break;
141                 }
142         return(ret);
143         }
144
145 static int new_dir(X509_LOOKUP *lu)
146         {
147         BY_DIR *a;
148
149         if ((a=(BY_DIR *)Malloc(sizeof(BY_DIR))) == NULL)
150                 return(0);
151         if ((a->buffer=BUF_MEM_new()) == NULL)
152                 {
153                 Free(a);
154                 return(0);
155                 }
156         a->num_dirs=0;
157         a->dirs=NULL;
158         a->dirs_type=NULL;
159         a->num_dirs_alloced=0;
160         lu->method_data=(char *)a;
161         return(1);
162         }
163
164 static void free_dir(X509_LOOKUP *lu)
165         {
166         BY_DIR *a;
167         int i;
168
169         a=(BY_DIR *)lu->method_data;
170         for (i=0; i<a->num_dirs; i++)
171                 if (a->dirs[i] != NULL) Free(a->dirs[i]);
172         if (a->dirs != NULL) Free(a->dirs);
173         if (a->dirs_type != NULL) Free(a->dirs_type);
174         if (a->buffer != NULL) BUF_MEM_free(a->buffer);
175         Free(a);
176         }
177
178 static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
179         {
180         int j,len;
181         int *ip;
182         const char *s,*ss,*p;
183         char **pp;
184
185         if (dir == NULL || !*dir)
186             {
187             X509err(X509_F_ADD_CERT_DIR,X509_R_INVALID_DIRECTORY);
188             return 0;
189             }
190
191         s=dir;
192         p=s;
193         for (;;)
194                 {
195                 if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0'))
196                         {
197                         ss=s;
198                         s=p+1;
199                         len=(int)(p-ss);
200                         if (len == 0) continue;
201                         for (j=0; j<ctx->num_dirs; j++)
202                                 if (strncmp(ctx->dirs[j],ss,(unsigned int)len) == 0)
203                                         continue;
204                         if (ctx->num_dirs_alloced < (ctx->num_dirs+1))
205                                 {
206                                 ctx->num_dirs_alloced+=10;
207                                 pp=(char **)Malloc(ctx->num_dirs_alloced*
208                                         sizeof(char *));
209                                 ip=(int *)Malloc(ctx->num_dirs_alloced*
210                                         sizeof(int));
211                                 if ((pp == NULL) || (ip == NULL))
212                                         {
213                                         X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE);
214                                         return(0);
215                                         }
216                                 memcpy(pp,ctx->dirs,(ctx->num_dirs_alloced-10)*
217                                         sizeof(char *));
218                                 memcpy(ip,ctx->dirs_type,(ctx->num_dirs_alloced-10)*
219                                         sizeof(int));
220                                 if (ctx->dirs != NULL)
221                                         Free((char *)ctx->dirs);
222                                 if (ctx->dirs_type != NULL)
223                                         Free((char *)ctx->dirs_type);
224                                 ctx->dirs=pp;
225                                 ctx->dirs_type=ip;
226                                 }
227                         ctx->dirs_type[ctx->num_dirs]=type;
228                         ctx->dirs[ctx->num_dirs]=(char *)Malloc((unsigned int)len+1);
229                         if (ctx->dirs[ctx->num_dirs] == NULL) return(0);
230                         strncpy(ctx->dirs[ctx->num_dirs],ss,(unsigned int)len);
231                         ctx->dirs[ctx->num_dirs][len]='\0';
232                         ctx->num_dirs++;
233                         }
234                 if (*p == '\0') break;
235                 p++;
236                 }
237         return(1);
238         }
239
240 static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
241              X509_OBJECT *ret)
242         {
243         BY_DIR *ctx;
244         union   {
245                 struct  {
246                         X509 st_x509;
247                         X509_CINF st_x509_cinf;
248                         } x509;
249                 struct  {
250                         X509_CRL st_crl;
251                         X509_CRL_INFO st_crl_info;
252                         } crl;
253                 } data;
254         int ok=0;
255         int i,j,k;
256         unsigned long h;
257         BUF_MEM *b=NULL;
258         struct stat st;
259         X509_OBJECT stmp,*tmp;
260         const char *postfix="";
261
262         if (name == NULL) return(0);
263
264         stmp.type=type;
265         if (type == X509_LU_X509)
266                 {
267                 data.x509.st_x509.cert_info= &data.x509.st_x509_cinf;
268                 data.x509.st_x509_cinf.subject=name;
269                 stmp.data.x509= &data.x509.st_x509;
270                 postfix="";
271                 }
272         else if (type == X509_LU_CRL)
273                 {
274                 data.crl.st_crl.crl= &data.crl.st_crl_info;
275                 data.crl.st_crl_info.issuer=name;
276                 stmp.data.crl= &data.crl.st_crl;
277                 postfix="r";
278                 }
279         else
280                 {
281                 X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE);
282                 goto finish;
283                 }
284
285         if ((b=BUF_MEM_new()) == NULL)
286                 {
287                 X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB);
288                 goto finish;
289                 }
290         
291         ctx=(BY_DIR *)xl->method_data;
292
293         h=X509_NAME_hash(name);
294         for (i=0; i<ctx->num_dirs; i++)
295                 {
296                 j=strlen(ctx->dirs[i])+1+8+6+1+1;
297                 if (!BUF_MEM_grow(b,j))
298                         {
299                         X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE);
300                         goto finish;
301                         }
302                 k=0;
303                 for (;;)
304                         {
305                         sprintf(b->data,"%s/%08lx.%s%d",ctx->dirs[i],h,
306                                 postfix,k);
307                         k++;
308                         if (stat(b->data,&st) < 0)
309                                 break;
310                         /* found one. */
311                         if (type == X509_LU_X509)
312                                 {
313                                 if ((X509_load_cert_file(xl,b->data,
314                                         ctx->dirs_type[i])) == 0)
315                                         break;
316                                 }
317                         else if (type == X509_LU_CRL)
318                                 {
319                                 if ((X509_load_crl_file(xl,b->data,
320                                         ctx->dirs_type[i])) == 0)
321                                         break;
322                                 }
323                         /* else case will caught higher up */
324                         }
325
326                 /* we have added it to the cache so now pull
327                  * it out again */
328                 CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
329                 tmp=(X509_OBJECT *)lh_retrieve(xl->store_ctx->certs,
330                         (char *)&stmp);
331                 CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
332
333                 if (tmp != NULL)
334                         {
335                         ok=1;
336                         ret->type=tmp->type;
337                         memcpy(&ret->data,&tmp->data,sizeof(ret->data));
338                         /* If we were going to up the reference count,
339                          * we would need to do it on a perl 'type'
340                          * basis */
341         /*              CRYPTO_add(&tmp->data.x509->references,1,
342                                 CRYPTO_LOCK_X509);*/
343                         goto finish;
344                         }
345                 }
346 finish:
347         if (b != NULL) BUF_MEM_free(b);
348         return(ok);
349         }
350