by_dir.c revision 167612 
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
77typedef 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
86static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
87	char **ret);
88static int new_dir(X509_LOOKUP *lu);
89static void free_dir(X509_LOOKUP *lu);
90static int add_cert_dir(BY_DIR *ctx,const char *dir,int type);
91static int get_cert_by_subject(X509_LOOKUP *xl,int type,X509_NAME *name,
92	X509_OBJECT *ret);
93X509_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
107X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
108	{
109	return(&x509_dir_lookup);
110	}
111
112static 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
144static 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
163static 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
177static 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 (;;p++)
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 (strlen(ctx->dirs[j]) == (size_t)len &&
202				    strncmp(ctx->dirs[j],ss,(unsigned int)len) == 0)
203					break;
204			if (j<ctx->num_dirs)
205				continue;
206			if (ctx->num_dirs_alloced < (ctx->num_dirs+1))
207				{
208				ctx->num_dirs_alloced+=10;
209				pp=(char **)OPENSSL_malloc(ctx->num_dirs_alloced*
210					sizeof(char *));
211				ip=(int *)OPENSSL_malloc(ctx->num_dirs_alloced*
212					sizeof(int));
213				if ((pp == NULL) || (ip == NULL))
214					{
215					X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE);
216					return(0);
217					}
218				memcpy(pp,ctx->dirs,(ctx->num_dirs_alloced-10)*
219					sizeof(char *));
220				memcpy(ip,ctx->dirs_type,(ctx->num_dirs_alloced-10)*
221					sizeof(int));
222				if (ctx->dirs != NULL)
223					OPENSSL_free(ctx->dirs);
224				if (ctx->dirs_type != NULL)
225					OPENSSL_free(ctx->dirs_type);
226				ctx->dirs=pp;
227				ctx->dirs_type=ip;
228				}
229			ctx->dirs_type[ctx->num_dirs]=type;
230			ctx->dirs[ctx->num_dirs]=(char *)OPENSSL_malloc((unsigned int)len+1);
231			if (ctx->dirs[ctx->num_dirs] == NULL) return(0);
232			strncpy(ctx->dirs[ctx->num_dirs],ss,(unsigned int)len);
233			ctx->dirs[ctx->num_dirs][len]='\0';
234			ctx->num_dirs++;
235			}
236		if (*p == '\0') break;
237		}
238	return(1);
239	}
240
241static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
242	     X509_OBJECT *ret)
243	{
244	BY_DIR *ctx;
245	union	{
246		struct	{
247			X509 st_x509;
248			X509_CINF st_x509_cinf;
249			} x509;
250		struct	{
251			X509_CRL st_crl;
252			X509_CRL_INFO st_crl_info;
253			} crl;
254		} data;
255	int ok=0;
256	int i,j,k;
257	unsigned long h;
258	BUF_MEM *b=NULL;
259	struct stat st;
260	X509_OBJECT stmp,*tmp;
261	const char *postfix="";
262
263	if (name == NULL) return(0);
264
265	stmp.type=type;
266	if (type == X509_LU_X509)
267		{
268		data.x509.st_x509.cert_info= &data.x509.st_x509_cinf;
269		data.x509.st_x509_cinf.subject=name;
270		stmp.data.x509= &data.x509.st_x509;
271		postfix="";
272		}
273	else if (type == X509_LU_CRL)
274		{
275		data.crl.st_crl.crl= &data.crl.st_crl_info;
276		data.crl.st_crl_info.issuer=name;
277		stmp.data.crl= &data.crl.st_crl;
278		postfix="r";
279		}
280	else
281		{
282		X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE);
283		goto finish;
284		}
285
286	if ((b=BUF_MEM_new()) == NULL)
287		{
288		X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB);
289		goto finish;
290		}
291
292	ctx=(BY_DIR *)xl->method_data;
293
294	h=X509_NAME_hash(name);
295	for (i=0; i<ctx->num_dirs; i++)
296		{
297		j=strlen(ctx->dirs[i])+1+8+6+1+1;
298		if (!BUF_MEM_grow(b,j))
299			{
300			X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE);
301			goto finish;
302			}
303		k=0;
304		for (;;)
305			{
306			char c = '/';
307#ifdef OPENSSL_SYS_VMS
308			c = ctx->dirs[i][strlen(ctx->dirs[i])-1];
309			if (c != ':' && c != '>' && c != ']')
310				{
311				/* If no separator is present, we assume the
312				   directory specifier is a logical name, and
313				   add a colon.  We really should use better
314				   VMS routines for merging things like this,
315				   but this will do for now...
316				   -- Richard Levitte */
317				c = ':';
318				}
319			else
320				{
321				c = '\0';
322				}
323#endif
324			if (c == '\0')
325				{
326				/* This is special.  When c == '\0', no
327				   directory separator should be added. */
328				BIO_snprintf(b->data,b->max,
329					"%s%08lx.%s%d",ctx->dirs[i],h,
330					postfix,k);
331				}
332			else
333				{
334				BIO_snprintf(b->data,b->max,
335					"%s%c%08lx.%s%d",ctx->dirs[i],c,h,
336					postfix,k);
337				}
338			k++;
339			if (stat(b->data,&st) < 0)
340				break;
341			/* found one. */
342			if (type == X509_LU_X509)
343				{
344				if ((X509_load_cert_file(xl,b->data,
345					ctx->dirs_type[i])) == 0)
346					break;
347				}
348			else if (type == X509_LU_CRL)
349				{
350				if ((X509_load_crl_file(xl,b->data,
351					ctx->dirs_type[i])) == 0)
352					break;
353				}
354			/* else case will caught higher up */
355			}
356
357		/* we have added it to the cache so now pull
358		 * it out again */
359		CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
360		j = sk_X509_OBJECT_find(xl->store_ctx->objs,&stmp);
361		if(j != -1) tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,j);
362		else tmp = NULL;
363		CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
364
365		if (tmp != NULL)
366			{
367			ok=1;
368			ret->type=tmp->type;
369			memcpy(&ret->data,&tmp->data,sizeof(ret->data));
370			/* If we were going to up the reference count,
371			 * we would need to do it on a perl 'type'
372			 * basis */
373	/*		CRYPTO_add(&tmp->data.x509->references,1,
374				CRYPTO_LOCK_X509);*/
375			goto finish;
376			}
377		}
378finish:
379	if (b != NULL) BUF_MEM_free(b);
380	return(ok);
381	}
382
383