by_dir.c revision 127128 
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;
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			ret=add_cert_dir(ld,X509_get_default_cert_dir(),
127				X509_FILETYPE_PEM);
128			if (!ret)
129				{
130				X509err(X509_F_DIR_CTRL,X509_R_LOADING_CERT_DIR);
131				}
132			else
133				{
134				dir=(char *)Getenv(X509_get_default_cert_dir_env());
135				ret=add_cert_dir(ld,dir,X509_FILETYPE_PEM);
136				}
137			}
138		else
139			ret=add_cert_dir(ld,argp,(int)argl);
140		break;
141		}
142	return(ret);
143	}
144
145static int new_dir(X509_LOOKUP *lu)
146	{
147	BY_DIR *a;
148
149	if ((a=(BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL)
150		return(0);
151	if ((a->buffer=BUF_MEM_new()) == NULL)
152		{
153		OPENSSL_free(a);
154		return(0);
155		}
156	a->num_dirs=0;
157	a->dirs=NULL;
158	a->dirs_type=NULL;
159	a->num_dirs_alloced=0;
160	lu->method_data=(char *)a;
161	return(1);
162	}
163
164static void free_dir(X509_LOOKUP *lu)
165	{
166	BY_DIR *a;
167	int i;
168
169	a=(BY_DIR *)lu->method_data;
170	for (i=0; i<a->num_dirs; i++)
171		if (a->dirs[i] != NULL) OPENSSL_free(a->dirs[i]);
172	if (a->dirs != NULL) OPENSSL_free(a->dirs);
173	if (a->dirs_type != NULL) OPENSSL_free(a->dirs_type);
174	if (a->buffer != NULL) BUF_MEM_free(a->buffer);
175	OPENSSL_free(a);
176	}
177
178static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
179	{
180	int j,len;
181	int *ip;
182	const char *s,*ss,*p;
183	char **pp;
184
185	if (dir == NULL || !*dir)
186	    {
187	    X509err(X509_F_ADD_CERT_DIR,X509_R_INVALID_DIRECTORY);
188	    return 0;
189	    }
190
191	s=dir;
192	p=s;
193	for (;;)
194		{
195		if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0'))
196			{
197			ss=s;
198			s=p+1;
199			len=(int)(p-ss);
200			if (len == 0) continue;
201			for (j=0; j<ctx->num_dirs; j++)
202				if (strncmp(ctx->dirs[j],ss,(unsigned int)len) == 0)
203					continue;
204			if (ctx->num_dirs_alloced < (ctx->num_dirs+1))
205				{
206				ctx->num_dirs_alloced+=10;
207				pp=(char **)OPENSSL_malloc(ctx->num_dirs_alloced*
208					sizeof(char *));
209				ip=(int *)OPENSSL_malloc(ctx->num_dirs_alloced*
210					sizeof(int));
211				if ((pp == NULL) || (ip == NULL))
212					{
213					X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE);
214					return(0);
215					}
216				memcpy(pp,ctx->dirs,(ctx->num_dirs_alloced-10)*
217					sizeof(char *));
218				memcpy(ip,ctx->dirs_type,(ctx->num_dirs_alloced-10)*
219					sizeof(int));
220				if (ctx->dirs != NULL)
221					OPENSSL_free(ctx->dirs);
222				if (ctx->dirs_type != NULL)
223					OPENSSL_free(ctx->dirs_type);
224				ctx->dirs=pp;
225				ctx->dirs_type=ip;
226				}
227			ctx->dirs_type[ctx->num_dirs]=type;
228			ctx->dirs[ctx->num_dirs]=(char *)OPENSSL_malloc((unsigned int)len+1);
229			if (ctx->dirs[ctx->num_dirs] == NULL) return(0);
230			strncpy(ctx->dirs[ctx->num_dirs],ss,(unsigned int)len);
231			ctx->dirs[ctx->num_dirs][len]='\0';
232			ctx->num_dirs++;
233			}
234		if (*p == '\0') break;
235		p++;
236		}
237	return(1);
238	}
239
240static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
241	     X509_OBJECT *ret)
242	{
243	BY_DIR *ctx;
244	union	{
245		struct	{
246			X509 st_x509;
247			X509_CINF st_x509_cinf;
248			} x509;
249		struct	{
250			X509_CRL st_crl;
251			X509_CRL_INFO st_crl_info;
252			} crl;
253		} data;
254	int ok=0;
255	int i,j,k;
256	unsigned long h;
257	BUF_MEM *b=NULL;
258	struct stat st;
259	X509_OBJECT stmp,*tmp;
260	const char *postfix="";
261
262	if (name == NULL) return(0);
263
264	stmp.type=type;
265	if (type == X509_LU_X509)
266		{
267		data.x509.st_x509.cert_info= &data.x509.st_x509_cinf;
268		data.x509.st_x509_cinf.subject=name;
269		stmp.data.x509= &data.x509.st_x509;
270		postfix="";
271		}
272	else if (type == X509_LU_CRL)
273		{
274		data.crl.st_crl.crl= &data.crl.st_crl_info;
275		data.crl.st_crl_info.issuer=name;
276		stmp.data.crl= &data.crl.st_crl;
277		postfix="r";
278		}
279	else
280		{
281		X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE);
282		goto finish;
283		}
284
285	if ((b=BUF_MEM_new()) == NULL)
286		{
287		X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB);
288		goto finish;
289		}
290
291	ctx=(BY_DIR *)xl->method_data;
292
293	h=X509_NAME_hash(name);
294	for (i=0; i<ctx->num_dirs; i++)
295		{
296		j=strlen(ctx->dirs[i])+1+8+6+1+1;
297		if (!BUF_MEM_grow(b,j))
298			{
299			X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE);
300			goto finish;
301			}
302		k=0;
303		for (;;)
304			{
305			char c = '/';
306#ifdef OPENSSL_SYS_VMS
307			c = ctx->dirs[i][strlen(ctx->dirs[i])-1];
308			if (c != ':' && c != '>' && c != ']')
309				{
310				/* If no separator is present, we assume the
311				   directory specifier is a logical name, and
312				   add a colon.  We really should use better
313				   VMS routines for merging things like this,
314				   but this will do for now...
315				   -- Richard Levitte */
316				c = ':';
317				}
318			else
319				{
320				c = '\0';
321				}
322#endif
323			if (c == '\0')
324				{
325				/* This is special.  When c == '\0', no
326				   directory separator should be added. */
327				BIO_snprintf(b->data,b->max,
328					"%s%08lx.%s%d",ctx->dirs[i],h,
329					postfix,k);
330				}
331			else
332				{
333				BIO_snprintf(b->data,b->max,
334					"%s%c%08lx.%s%d",ctx->dirs[i],c,h,
335					postfix,k);
336				}
337			k++;
338			if (stat(b->data,&st) < 0)
339				break;
340			/* found one. */
341			if (type == X509_LU_X509)
342				{
343				if ((X509_load_cert_file(xl,b->data,
344					ctx->dirs_type[i])) == 0)
345					break;
346				}
347			else if (type == X509_LU_CRL)
348				{
349				if ((X509_load_crl_file(xl,b->data,
350					ctx->dirs_type[i])) == 0)
351					break;
352				}
353			/* else case will caught higher up */
354			}
355
356		/* we have added it to the cache so now pull
357		 * it out again */
358		CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
359		j = sk_X509_OBJECT_find(xl->store_ctx->objs,&stmp);
360		if(j != -1) tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,j);
361		else tmp = NULL;
362		CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
363
364		if (tmp != NULL)
365			{
366			ok=1;
367			ret->type=tmp->type;
368			memcpy(&ret->data,&tmp->data,sizeof(ret->data));
369			/* If we were going to up the reference count,
370			 * we would need to do it on a perl 'type'
371			 * basis */
372	/*		CRYPTO_add(&tmp->data.x509->references,1,
373				CRYPTO_LOCK_X509);*/
374			goto finish;
375			}
376		}
377finish:
378	if (b != NULL) BUF_MEM_free(b);
379	return(ok);
380	}
381
382