by_dir.c revision 55714 
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
69typedef 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
78static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
79	char **ret);
80static int new_dir(X509_LOOKUP *lu);
81static void free_dir(X509_LOOKUP *lu);
82static int add_cert_dir(BY_DIR *ctx,const char *dir,int type);
83static int get_cert_by_subject(X509_LOOKUP *xl,int type,X509_NAME *name,
84	X509_OBJECT *ret);
85X509_LOOKUP_METHOD x509_dir_lookup=
86	{
87	"Load certs from files in a directory",
88	new_dir,		/* new */
89	free_dir,		/* free */
90	NULL, 			/* init */
91	NULL,			/* shutdown */
92	dir_ctrl,		/* ctrl */
93	get_cert_by_subject,	/* get_by_subject */
94	NULL,			/* get_by_issuer_serial */
95	NULL,			/* get_by_fingerprint */
96	NULL,			/* get_by_alias */
97	};
98
99X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
100	{
101	return(&x509_dir_lookup);
102	}
103
104static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
105	     char **retp)
106	{
107	int ret=0;
108	BY_DIR *ld;
109	char *dir;
110
111	ld=(BY_DIR *)ctx->method_data;
112
113	switch (cmd)
114		{
115	case X509_L_ADD_DIR:
116		if (argl == X509_FILETYPE_DEFAULT)
117			{
118			ret=add_cert_dir(ld,X509_get_default_cert_dir(),
119				X509_FILETYPE_PEM);
120			if (!ret)
121				{
122				X509err(X509_F_DIR_CTRL,X509_R_LOADING_CERT_DIR);
123				}
124			else
125				{
126				dir=(char *)Getenv(X509_get_default_cert_dir_env());
127				ret=add_cert_dir(ld,dir,X509_FILETYPE_PEM);
128				}
129			}
130		else
131			ret=add_cert_dir(ld,argp,(int)argl);
132		break;
133		}
134	return(ret);
135	}
136
137static int new_dir(X509_LOOKUP *lu)
138	{
139	BY_DIR *a;
140
141	if ((a=(BY_DIR *)Malloc(sizeof(BY_DIR))) == NULL)
142		return(0);
143	if ((a->buffer=BUF_MEM_new()) == NULL)
144		{
145		Free(a);
146		return(0);
147		}
148	a->num_dirs=0;
149	a->dirs=NULL;
150	a->dirs_type=NULL;
151	a->num_dirs_alloced=0;
152	lu->method_data=(char *)a;
153	return(1);
154	}
155
156static void free_dir(X509_LOOKUP *lu)
157	{
158	BY_DIR *a;
159	int i;
160
161	a=(BY_DIR *)lu->method_data;
162	for (i=0; i<a->num_dirs; i++)
163		if (a->dirs[i] != NULL) Free(a->dirs[i]);
164	if (a->dirs != NULL) Free(a->dirs);
165	if (a->dirs_type != NULL) Free(a->dirs_type);
166	if (a->buffer != NULL) BUF_MEM_free(a->buffer);
167	Free(a);
168	}
169
170static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
171	{
172	int j,len;
173	int *ip;
174	const char *s,*ss,*p;
175	char **pp;
176
177	if (dir == NULL || !*dir)
178	    {
179	    X509err(X509_F_ADD_CERT_DIR,X509_R_INVALID_DIRECTORY);
180	    return 0;
181	    }
182
183	s=dir;
184	p=s;
185	for (;;)
186		{
187		if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0'))
188			{
189			ss=s;
190			s=p+1;
191			len=(int)(p-ss);
192			if (len == 0) continue;
193			for (j=0; j<ctx->num_dirs; j++)
194				if (strncmp(ctx->dirs[j],ss,(unsigned int)len) == 0)
195					continue;
196			if (ctx->num_dirs_alloced < (ctx->num_dirs+1))
197				{
198				ctx->num_dirs_alloced+=10;
199				pp=(char **)Malloc(ctx->num_dirs_alloced*
200					sizeof(char *));
201				ip=(int *)Malloc(ctx->num_dirs_alloced*
202					sizeof(int));
203				if ((pp == NULL) || (ip == NULL))
204					{
205					X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE);
206					return(0);
207					}
208				memcpy(pp,ctx->dirs,(ctx->num_dirs_alloced-10)*
209					sizeof(char *));
210				memcpy(ip,ctx->dirs_type,(ctx->num_dirs_alloced-10)*
211					sizeof(int));
212				if (ctx->dirs != NULL)
213					Free((char *)ctx->dirs);
214				if (ctx->dirs_type != NULL)
215					Free((char *)ctx->dirs_type);
216				ctx->dirs=pp;
217				ctx->dirs_type=ip;
218				}
219			ctx->dirs_type[ctx->num_dirs]=type;
220			ctx->dirs[ctx->num_dirs]=(char *)Malloc((unsigned int)len+1);
221			if (ctx->dirs[ctx->num_dirs] == NULL) return(0);
222			strncpy(ctx->dirs[ctx->num_dirs],ss,(unsigned int)len);
223			ctx->dirs[ctx->num_dirs][len]='\0';
224			ctx->num_dirs++;
225			}
226		if (*p == '\0') break;
227		p++;
228		}
229	return(1);
230	}
231
232static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
233	     X509_OBJECT *ret)
234	{
235	BY_DIR *ctx;
236	union	{
237		struct	{
238			X509 st_x509;
239			X509_CINF st_x509_cinf;
240			} x509;
241		struct	{
242			X509_CRL st_crl;
243			X509_CRL_INFO st_crl_info;
244			} crl;
245		} data;
246	int ok=0;
247	int i,j,k;
248	unsigned long h;
249	BUF_MEM *b=NULL;
250	struct stat st;
251	X509_OBJECT stmp,*tmp;
252	const char *postfix="";
253
254	if (name == NULL) return(0);
255
256	stmp.type=type;
257	if (type == X509_LU_X509)
258		{
259		data.x509.st_x509.cert_info= &data.x509.st_x509_cinf;
260		data.x509.st_x509_cinf.subject=name;
261		stmp.data.x509= &data.x509.st_x509;
262		postfix="";
263		}
264	else if (type == X509_LU_CRL)
265		{
266		data.crl.st_crl.crl= &data.crl.st_crl_info;
267		data.crl.st_crl_info.issuer=name;
268		stmp.data.crl= &data.crl.st_crl;
269		postfix="r";
270		}
271	else
272		{
273		X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE);
274		goto finish;
275		}
276
277	if ((b=BUF_MEM_new()) == NULL)
278		{
279		X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB);
280		goto finish;
281		}
282
283	ctx=(BY_DIR *)xl->method_data;
284
285	h=X509_NAME_hash(name);
286	for (i=0; i<ctx->num_dirs; i++)
287		{
288		j=strlen(ctx->dirs[i])+1+8+6+1+1;
289		if (!BUF_MEM_grow(b,j))
290			{
291			X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE);
292			goto finish;
293			}
294		k=0;
295		for (;;)
296			{
297			sprintf(b->data,"%s/%08lx.%s%d",ctx->dirs[i],h,
298				postfix,k);
299			k++;
300			if (stat(b->data,&st) < 0)
301				break;
302			/* found one. */
303			if (type == X509_LU_X509)
304				{
305				if ((X509_load_cert_file(xl,b->data,
306					ctx->dirs_type[i])) == 0)
307					break;
308				}
309			else if (type == X509_LU_CRL)
310				{
311				if ((X509_load_crl_file(xl,b->data,
312					ctx->dirs_type[i])) == 0)
313					break;
314				}
315			/* else case will caught higher up */
316			}
317
318		/* we have added it to the cache so now pull
319		 * it out again */
320		CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
321		tmp=(X509_OBJECT *)lh_retrieve(xl->store_ctx->certs,
322			(char *)&stmp);
323		CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
324
325		if (tmp != NULL)
326			{
327			ok=1;
328			ret->type=tmp->type;
329			memcpy(&ret->data,&tmp->data,sizeof(ret->data));
330			/* If we were going to up the reference count,
331			 * we would need to do it on a perl 'type'
332			 * basis */
333	/*		CRYPTO_add(&tmp->data.x509->references,1,
334				CRYPTO_LOCK_X509);*/
335			goto finish;
336			}
337		}
338finish:
339	if (b != NULL) BUF_MEM_free(b);
340	return(ok);
341	}
342
343