xref: /openbsd/lib/libcrypto/x509/by_dir.c (revision 404b540a) 
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 #ifdef _WIN32
78 #define stat	_stat
79 #endif
80 
81 typedef struct lookup_dir_st
82 	{
83 	BUF_MEM *buffer;
84 	int num_dirs;
85 	char **dirs;
86 	int *dirs_type;
87 	int num_dirs_alloced;
88 	} BY_DIR;
89 
90 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
91 	char **ret);
92 static int new_dir(X509_LOOKUP *lu);
93 static void free_dir(X509_LOOKUP *lu);
94 static int add_cert_dir(BY_DIR *ctx,const char *dir,int type);
95 static int get_cert_by_subject(X509_LOOKUP *xl,int type,X509_NAME *name,
96 	X509_OBJECT *ret);
97 X509_LOOKUP_METHOD x509_dir_lookup=
98 	{
99 	"Load certs from files in a directory",
100 	new_dir,		/* new */
101 	free_dir,		/* free */
102 	NULL, 			/* init */
103 	NULL,			/* shutdown */
104 	dir_ctrl,		/* ctrl */
105 	get_cert_by_subject,	/* get_by_subject */
106 	NULL,			/* get_by_issuer_serial */
107 	NULL,			/* get_by_fingerprint */
108 	NULL,			/* get_by_alias */
109 	};
110 
111 X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
112 	{
113 	return(&x509_dir_lookup);
114 	}
115 
116 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
117 	     char **retp)
118 	{
119 	int ret=0;
120 	BY_DIR *ld;
121 	char *dir = NULL;
122 
123 	ld=(BY_DIR *)ctx->method_data;
124 
125 	switch (cmd)
126 		{
127 	case X509_L_ADD_DIR:
128 		if (argl == X509_FILETYPE_DEFAULT)
129 			{
130 			dir=(char *)Getenv(X509_get_default_cert_dir_env());
131 			if (dir)
132 				ret=add_cert_dir(ld,dir,X509_FILETYPE_PEM);
133 			else
134 				ret=add_cert_dir(ld,X509_get_default_cert_dir(),
135 					X509_FILETYPE_PEM);
136 			if (!ret)
137 				{
138 				X509err(X509_F_DIR_CTRL,X509_R_LOADING_CERT_DIR);
139 				}
140 			}
141 		else
142 			ret=add_cert_dir(ld,argp,(int)argl);
143 		break;
144 		}
145 	return(ret);
146 	}
147 
148 static int new_dir(X509_LOOKUP *lu)
149 	{
150 	BY_DIR *a;
151 
152 	if ((a=(BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL)
153 		return(0);
154 	if ((a->buffer=BUF_MEM_new()) == NULL)
155 		{
156 		OPENSSL_free(a);
157 		return(0);
158 		}
159 	a->num_dirs=0;
160 	a->dirs=NULL;
161 	a->dirs_type=NULL;
162 	a->num_dirs_alloced=0;
163 	lu->method_data=(char *)a;
164 	return(1);
165 	}
166 
167 static void free_dir(X509_LOOKUP *lu)
168 	{
169 	BY_DIR *a;
170 	int i;
171 
172 	a=(BY_DIR *)lu->method_data;
173 	for (i=0; i<a->num_dirs; i++)
174 		if (a->dirs[i] != NULL) OPENSSL_free(a->dirs[i]);
175 	if (a->dirs != NULL) OPENSSL_free(a->dirs);
176 	if (a->dirs_type != NULL) OPENSSL_free(a->dirs_type);
177 	if (a->buffer != NULL) BUF_MEM_free(a->buffer);
178 	OPENSSL_free(a);
179 	}
180 
181 static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
182 	{
183 	int j,len;
184 	int *ip;
185 	const char *s,*ss,*p;
186 	char **pp;
187 
188 	if (dir == NULL || !*dir)
189 	    {
190 	    X509err(X509_F_ADD_CERT_DIR,X509_R_INVALID_DIRECTORY);
191 	    return 0;
192 	    }
193 
194 	s=dir;
195 	p=s;
196 	for (;;p++)
197 		{
198 		if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0'))
199 			{
200 			ss=s;
201 			s=p+1;
202 			len=(int)(p-ss);
203 			if (len == 0) continue;
204 			for (j=0; j<ctx->num_dirs; j++)
205 				if (strlen(ctx->dirs[j]) == (size_t)len &&
206 				    strncmp(ctx->dirs[j],ss,(unsigned int)len) == 0)
207 					break;
208 			if (j<ctx->num_dirs)
209 				continue;
210 			if (ctx->num_dirs_alloced < (ctx->num_dirs+1))
211 				{
212 				ctx->num_dirs_alloced+=10;
213 				pp=(char **)OPENSSL_malloc(ctx->num_dirs_alloced*
214 					sizeof(char *));
215 				ip=(int *)OPENSSL_malloc(ctx->num_dirs_alloced*
216 					sizeof(int));
217 				if ((pp == NULL) || (ip == NULL))
218 					{
219 					X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE);
220 					return(0);
221 					}
222 				memcpy(pp,ctx->dirs,(ctx->num_dirs_alloced-10)*
223 					sizeof(char *));
224 				memcpy(ip,ctx->dirs_type,(ctx->num_dirs_alloced-10)*
225 					sizeof(int));
226 				if (ctx->dirs != NULL)
227 					OPENSSL_free(ctx->dirs);
228 				if (ctx->dirs_type != NULL)
229 					OPENSSL_free(ctx->dirs_type);
230 				ctx->dirs=pp;
231 				ctx->dirs_type=ip;
232 				}
233 			ctx->dirs_type[ctx->num_dirs]=type;
234 			ctx->dirs[ctx->num_dirs]=(char *)OPENSSL_malloc((unsigned int)len+1);
235 			if (ctx->dirs[ctx->num_dirs] == NULL) return(0);
236 			strncpy(ctx->dirs[ctx->num_dirs],ss,(unsigned int)len);
237 			ctx->dirs[ctx->num_dirs][len]='\0';
238 			ctx->num_dirs++;
239 			}
240 		if (*p == '\0') break;
241 		}
242 	return(1);
243 	}
244 
245 static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
246 	     X509_OBJECT *ret)
247 	{
248 	BY_DIR *ctx;
249 	union	{
250 		struct	{
251 			X509 st_x509;
252 			X509_CINF st_x509_cinf;
253 			} x509;
254 		struct	{
255 			X509_CRL st_crl;
256 			X509_CRL_INFO st_crl_info;
257 			} crl;
258 		} data;
259 	int ok=0;
260 	int i,j,k;
261 	unsigned long h;
262 	BUF_MEM *b=NULL;
263 	struct stat st;
264 	X509_OBJECT stmp,*tmp;
265 	const char *postfix="";
266 
267 	if (name == NULL) return(0);
268 
269 	stmp.type=type;
270 	if (type == X509_LU_X509)
271 		{
272 		data.x509.st_x509.cert_info= &data.x509.st_x509_cinf;
273 		data.x509.st_x509_cinf.subject=name;
274 		stmp.data.x509= &data.x509.st_x509;
275 		postfix="";
276 		}
277 	else if (type == X509_LU_CRL)
278 		{
279 		data.crl.st_crl.crl= &data.crl.st_crl_info;
280 		data.crl.st_crl_info.issuer=name;
281 		stmp.data.crl= &data.crl.st_crl;
282 		postfix="r";
283 		}
284 	else
285 		{
286 		X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE);
287 		goto finish;
288 		}
289 
290 	if ((b=BUF_MEM_new()) == NULL)
291 		{
292 		X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB);
293 		goto finish;
294 		}
295 
296 	ctx=(BY_DIR *)xl->method_data;
297 
298 	h=X509_NAME_hash(name);
299 	for (i=0; i<ctx->num_dirs; i++)
300 		{
301 		j=strlen(ctx->dirs[i])+1+8+6+1+1;
302 		if (!BUF_MEM_grow(b,j))
303 			{
304 			X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE);
305 			goto finish;
306 			}
307 		k=0;
308 		for (;;)
309 			{
310 			char c = '/';
311 #ifdef OPENSSL_SYS_VMS
312 			c = ctx->dirs[i][strlen(ctx->dirs[i])-1];
313 			if (c != ':' && c != '>' && c != ']')
314 				{
315 				/* If no separator is present, we assume the
316 				   directory specifier is a logical name, and
317 				   add a colon.  We really should use better
318 				   VMS routines for merging things like this,
319 				   but this will do for now...
320 				   -- Richard Levitte */
321 				c = ':';
322 				}
323 			else
324 				{
325 				c = '\0';
326 				}
327 #endif
328 			if (c == '\0')
329 				{
330 				/* This is special.  When c == '\0', no
331 				   directory separator should be added. */
332 				BIO_snprintf(b->data,b->max,
333 					"%s%08lx.%s%d",ctx->dirs[i],h,
334 					postfix,k);
335 				}
336 			else
337 				{
338 				BIO_snprintf(b->data,b->max,
339 					"%s%c%08lx.%s%d",ctx->dirs[i],c,h,
340 					postfix,k);
341 				}
342 			k++;
343 			if (stat(b->data,&st) < 0)
344 				break;
345 			/* found one. */
346 			if (type == X509_LU_X509)
347 				{
348 				if ((X509_load_cert_file(xl,b->data,
349 					ctx->dirs_type[i])) == 0)
350 					break;
351 				}
352 			else if (type == X509_LU_CRL)
353 				{
354 				if ((X509_load_crl_file(xl,b->data,
355 					ctx->dirs_type[i])) == 0)
356 					break;
357 				}
358 			/* else case will caught higher up */
359 			}
360 
361 		/* we have added it to the cache so now pull
362 		 * it out again */
363 		CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
364 		j = sk_X509_OBJECT_find(xl->store_ctx->objs,&stmp);
365 		if(j != -1) tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,j);
366 		else tmp = NULL;
367 		CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
368 
369 		if (tmp != NULL)
370 			{
371 			ok=1;
372 			ret->type=tmp->type;
373 			memcpy(&ret->data,&tmp->data,sizeof(ret->data));
374 			/* If we were going to up the reference count,
375 			 * we would need to do it on a perl 'type'
376 			 * basis */
377 	/*		CRYPTO_add(&tmp->data.x509->references,1,
378 				CRYPTO_LOCK_X509);*/
379 			goto finish;
380 			}
381 		}
382 finish:
383 	if (b != NULL) BUF_MEM_free(b);
384 	return(ok);
385 	}
386 
387