5290970c76a84d31cc9de40dc0771dc011c914b4
[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
63 #include "cryptlib.h"
64
65 #ifndef NO_SYS_TYPES_H
66 # include <sys/types.h>
67 #endif
68 #ifndef OPENSSL_NO_POSIX_IO
69 # include <sys/stat.h>
70 #endif
71
72 #include <openssl/lhash.h>
73 #include <openssl/x509.h>
74
75 typedef struct lookup_dir_st
76         {
77         BUF_MEM *buffer;
78         int num_dirs;
79         char **dirs;
80         int *dirs_type;
81         int num_dirs_alloced;
82         } BY_DIR;
83
84 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
85         char **ret);
86 static int new_dir(X509_LOOKUP *lu);
87 static void free_dir(X509_LOOKUP *lu);
88 static int add_cert_dir(BY_DIR *ctx,const char *dir,int type);
89 static int get_cert_by_subject(X509_LOOKUP *xl,int type,X509_NAME *name,
90         X509_OBJECT *ret);
91 X509_LOOKUP_METHOD x509_dir_lookup=
92         {
93         "Load certs from files in a directory",
94         new_dir,                /* new */
95         free_dir,               /* free */
96         NULL,                   /* init */
97         NULL,                   /* shutdown */
98         dir_ctrl,               /* ctrl */
99         get_cert_by_subject,    /* get_by_subject */
100         NULL,                   /* get_by_issuer_serial */
101         NULL,                   /* get_by_fingerprint */
102         NULL,                   /* get_by_alias */
103         };
104
105 X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
106         {
107         return(&x509_dir_lookup);
108         }
109
110 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
111              char **retp)
112         {
113         int ret=0;
114         BY_DIR *ld;
115         char *dir = NULL;
116
117         ld=(BY_DIR *)ctx->method_data;
118
119         switch (cmd)
120                 {
121         case X509_L_ADD_DIR:
122                 if (argl == X509_FILETYPE_DEFAULT)
123                         {
124                         dir=(char *)Getenv(X509_get_default_cert_dir_env());
125                         if (dir)
126                                 ret=add_cert_dir(ld,dir,X509_FILETYPE_PEM);
127                         else
128                                 ret=add_cert_dir(ld,X509_get_default_cert_dir(),
129                                         X509_FILETYPE_PEM);
130                         if (!ret)
131                                 {
132                                 X509err(X509_F_DIR_CTRL,X509_R_LOADING_CERT_DIR);
133                                 }
134                         }
135                 else
136                         ret=add_cert_dir(ld,argp,(int)argl);
137                 break;
138                 }
139         return(ret);
140         }
141
142 static int new_dir(X509_LOOKUP *lu)
143         {
144         BY_DIR *a;
145
146         if ((a=(BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL)
147                 return(0);
148         if ((a->buffer=BUF_MEM_new()) == NULL)
149                 {
150                 OPENSSL_free(a);
151                 return(0);
152                 }
153         a->num_dirs=0;
154         a->dirs=NULL;
155         a->dirs_type=NULL;
156         a->num_dirs_alloced=0;
157         lu->method_data=(char *)a;
158         return(1);
159         }
160
161 static void free_dir(X509_LOOKUP *lu)
162         {
163         BY_DIR *a;
164         int i;
165
166         a=(BY_DIR *)lu->method_data;
167         for (i=0; i<a->num_dirs; i++)
168                 if (a->dirs[i] != NULL) OPENSSL_free(a->dirs[i]);
169         if (a->dirs != NULL) OPENSSL_free(a->dirs);
170         if (a->dirs_type != NULL) OPENSSL_free(a->dirs_type);
171         if (a->buffer != NULL) BUF_MEM_free(a->buffer);
172         OPENSSL_free(a);
173         }
174
175 static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
176         {
177         int j,len;
178         int *ip;
179         const char *s,*ss,*p;
180         char **pp;
181
182         if (dir == NULL || !*dir)
183             {
184             X509err(X509_F_ADD_CERT_DIR,X509_R_INVALID_DIRECTORY);
185             return 0;
186             }
187
188         s=dir;
189         p=s;
190         for (;;)
191                 {
192                 if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0'))
193                         {
194                         ss=s;
195                         s=p+1;
196                         len=(int)(p-ss);
197                         if (len == 0) continue;
198                         for (j=0; j<ctx->num_dirs; j++)
199                                 if (strncmp(ctx->dirs[j],ss,(unsigned int)len) == 0)
200                                         continue;
201                         if (ctx->num_dirs_alloced < (ctx->num_dirs+1))
202                                 {
203                                 ctx->num_dirs_alloced+=10;
204                                 pp=(char **)OPENSSL_malloc(ctx->num_dirs_alloced*
205                                         sizeof(char *));
206                                 ip=(int *)OPENSSL_malloc(ctx->num_dirs_alloced*
207                                         sizeof(int));
208                                 if ((pp == NULL) || (ip == NULL))
209                                         {
210                                         X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE);
211                                         return(0);
212                                         }
213                                 memcpy(pp,ctx->dirs,(ctx->num_dirs_alloced-10)*
214                                         sizeof(char *));
215                                 memcpy(ip,ctx->dirs_type,(ctx->num_dirs_alloced-10)*
216                                         sizeof(int));
217                                 if (ctx->dirs != NULL)
218                                         OPENSSL_free(ctx->dirs);
219                                 if (ctx->dirs_type != NULL)
220                                         OPENSSL_free(ctx->dirs_type);
221                                 ctx->dirs=pp;
222                                 ctx->dirs_type=ip;
223                                 }
224                         ctx->dirs_type[ctx->num_dirs]=type;
225                         ctx->dirs[ctx->num_dirs]=(char *)OPENSSL_malloc((unsigned int)len+1);
226                         if (ctx->dirs[ctx->num_dirs] == NULL) return(0);
227                         strncpy(ctx->dirs[ctx->num_dirs],ss,(unsigned int)len);
228                         ctx->dirs[ctx->num_dirs][len]='\0';
229                         ctx->num_dirs++;
230                         }
231                 if (*p == '\0') break;
232                 p++;
233                 }
234         return(1);
235         }
236
237 static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
238              X509_OBJECT *ret)
239         {
240         BY_DIR *ctx;
241         union   {
242                 struct  {
243                         X509 st_x509;
244                         X509_CINF st_x509_cinf;
245                         } x509;
246                 struct  {
247                         X509_CRL st_crl;
248                         X509_CRL_INFO st_crl_info;
249                         } crl;
250                 } data;
251         int ok=0;
252         int i,j,k;
253         unsigned long h;
254         BUF_MEM *b=NULL;
255         X509_OBJECT stmp,*tmp;
256         const char *postfix="";
257
258         if (name == NULL) return(0);
259
260         stmp.type=type;
261         if (type == X509_LU_X509)
262                 {
263                 data.x509.st_x509.cert_info= &data.x509.st_x509_cinf;
264                 data.x509.st_x509_cinf.subject=name;
265                 stmp.data.x509= &data.x509.st_x509;
266                 postfix="";
267                 }
268         else if (type == X509_LU_CRL)
269                 {
270                 data.crl.st_crl.crl= &data.crl.st_crl_info;
271                 data.crl.st_crl_info.issuer=name;
272                 stmp.data.crl= &data.crl.st_crl;
273                 postfix="r";
274                 }
275         else
276                 {
277                 X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE);
278                 goto finish;
279                 }
280
281         if ((b=BUF_MEM_new()) == NULL)
282                 {
283                 X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB);
284                 goto finish;
285                 }
286         
287         ctx=(BY_DIR *)xl->method_data;
288
289         h=X509_NAME_hash(name);
290         for (i=0; i<ctx->num_dirs; i++)
291                 {
292                 j=strlen(ctx->dirs[i])+1+8+6+1+1;
293                 if (!BUF_MEM_grow(b,j))
294                         {
295                         X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE);
296                         goto finish;
297                         }
298                 k=0;
299                 for (;;)
300                         {
301                         char c = '/';
302 #ifdef OPENSSL_SYS_VMS
303                         c = ctx->dirs[i][strlen(ctx->dirs[i])-1];
304                         if (c != ':' && c != '>' && c != ']')
305                                 {
306                                 /* If no separator is present, we assume the
307                                    directory specifier is a logical name, and
308                                    add a colon.  We really should use better
309                                    VMS routines for merging things like this,
310                                    but this will do for now...
311                                    -- Richard Levitte */
312                                 c = ':';
313                                 }
314                         else
315                                 {
316                                 c = '\0';
317                                 }
318 #endif
319                         if (c == '\0')
320                                 {
321                                 /* This is special.  When c == '\0', no
322                                    directory separator should be added. */
323                                 BIO_snprintf(b->data,b->max,
324                                         "%s%08lx.%s%d",ctx->dirs[i],h,
325                                         postfix,k);
326                                 }
327                         else
328                                 {
329                                 BIO_snprintf(b->data,b->max,
330                                         "%s%c%08lx.%s%d",ctx->dirs[i],c,h,
331                                         postfix,k);
332                                 }
333                         k++;
334 #ifndef OPENSSL_NO_POSIX_IO
335                         {
336                         struct stat st;
337                         if (stat(b->data,&st) < 0)
338                                 break;
339                         }
340 #endif
341                         /* found one. */
342                         if (type == X509_LU_X509)
343                                 {
344                                 if ((X509_load_cert_file(xl,b->data,
345                                         ctx->dirs_type[i])) == 0)
346                                         break;
347                                 }
348                         else if (type == X509_LU_CRL)
349                                 {
350                                 if ((X509_load_crl_file(xl,b->data,
351                                         ctx->dirs_type[i])) == 0)
352                                         break;
353                                 }
354                         /* else case will caught higher up */
355                         }
356
357                 /* we have added it to the cache so now pull
358                  * it out again */
359                 CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
360                 j = sk_X509_OBJECT_find(xl->store_ctx->objs,&stmp);
361                 if(j != -1) tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,j);
362                 else tmp = NULL;
363                 CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
364
365                 if (tmp != NULL)
366                         {
367                         ok=1;
368                         ret->type=tmp->type;
369                         memcpy(&ret->data,&tmp->data,sizeof(ret->data));
370                         /* If we were going to up the reference count,
371                          * we would need to do it on a perl 'type'
372                          * basis */
373         /*              CRYPTO_add(&tmp->data.x509->references,1,
374                                 CRYPTO_LOCK_X509);*/
375                         goto finish;
376                         }
377                 }
378 finish:
379         if (b != NULL) BUF_MEM_free(b);
380         return(ok);
381         }
382