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 (;;)
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
239static 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		}
376finish:
377	if (b != NULL) BUF_MEM_free(b);
378	return(ok);
379	}
380
381