by_dir.c revision 225736 
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
81typedef 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
90static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
91	char **ret);
92static int new_dir(X509_LOOKUP *lu);
93static void free_dir(X509_LOOKUP *lu);
94static int add_cert_dir(BY_DIR *ctx,const char *dir,int type);
95static int get_cert_by_subject(X509_LOOKUP *xl,int type,X509_NAME *name,
96	X509_OBJECT *ret);
97X509_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
111X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
112	{
113	return(&x509_dir_lookup);
114	}
115
116static 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
148static 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
167static 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
181static 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
245static 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_w_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_w_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		}
382finish:
383	if (b != NULL) BUF_MEM_free(b);
384	return(ok);
385	}
386