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