xref: /freebsd/crypto/openssl/crypto/x509/by_dir.c (revision 7bd6fde3) 
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 
381