by_dir.c revision 279264 
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#ifndef OPENSSL_NO_POSIX_IO
69# include <sys/stat.h>
70#endif
71
72#include <openssl/lhash.h>
73#include <openssl/x509.h>
74
75
76typedef struct lookup_dir_hashes_st
77	{
78	unsigned long hash;
79	int suffix;
80	} BY_DIR_HASH;
81
82typedef struct lookup_dir_entry_st
83	{
84	char *dir;
85	int dir_type;
86	STACK_OF(BY_DIR_HASH) *hashes;
87	} BY_DIR_ENTRY;
88
89typedef struct lookup_dir_st
90	{
91	BUF_MEM *buffer;
92	STACK_OF(BY_DIR_ENTRY) *dirs;
93	} BY_DIR;
94
95DECLARE_STACK_OF(BY_DIR_HASH)
96DECLARE_STACK_OF(BY_DIR_ENTRY)
97
98static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
99	char **ret);
100static int new_dir(X509_LOOKUP *lu);
101static void free_dir(X509_LOOKUP *lu);
102static int add_cert_dir(BY_DIR *ctx,const char *dir,int type);
103static int get_cert_by_subject(X509_LOOKUP *xl,int type,X509_NAME *name,
104	X509_OBJECT *ret);
105X509_LOOKUP_METHOD x509_dir_lookup=
106	{
107	"Load certs from files in a directory",
108	new_dir,		/* new */
109	free_dir,		/* free */
110	NULL, 			/* init */
111	NULL,			/* shutdown */
112	dir_ctrl,		/* ctrl */
113	get_cert_by_subject,	/* get_by_subject */
114	NULL,			/* get_by_issuer_serial */
115	NULL,			/* get_by_fingerprint */
116	NULL,			/* get_by_alias */
117	};
118
119X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
120	{
121	return(&x509_dir_lookup);
122	}
123
124static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
125	     char **retp)
126	{
127	int ret=0;
128	BY_DIR *ld;
129	char *dir = NULL;
130
131	ld=(BY_DIR *)ctx->method_data;
132
133	switch (cmd)
134		{
135	case X509_L_ADD_DIR:
136		if (argl == X509_FILETYPE_DEFAULT)
137			{
138			dir=(char *)getenv(X509_get_default_cert_dir_env());
139			if (dir)
140				ret=add_cert_dir(ld,dir,X509_FILETYPE_PEM);
141			else
142				ret=add_cert_dir(ld,X509_get_default_cert_dir(),
143					X509_FILETYPE_PEM);
144			if (!ret)
145				{
146				X509err(X509_F_DIR_CTRL,X509_R_LOADING_CERT_DIR);
147				}
148			}
149		else
150			ret=add_cert_dir(ld,argp,(int)argl);
151		break;
152		}
153	return(ret);
154	}
155
156static int new_dir(X509_LOOKUP *lu)
157	{
158	BY_DIR *a;
159
160	if ((a=(BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL)
161		return(0);
162	if ((a->buffer=BUF_MEM_new()) == NULL)
163		{
164		OPENSSL_free(a);
165		return(0);
166		}
167	a->dirs=NULL;
168	lu->method_data=(char *)a;
169	return(1);
170	}
171
172static void by_dir_hash_free(BY_DIR_HASH *hash)
173	{
174	OPENSSL_free(hash);
175	}
176
177static int by_dir_hash_cmp(const BY_DIR_HASH * const *a,
178			const BY_DIR_HASH * const *b)
179	{
180	if ((*a)->hash > (*b)->hash)
181		return 1;
182	if ((*a)->hash < (*b)->hash)
183		return -1;
184	return 0;
185	}
186
187static void by_dir_entry_free(BY_DIR_ENTRY *ent)
188	{
189	if (ent->dir)
190		OPENSSL_free(ent->dir);
191	if (ent->hashes)
192		sk_BY_DIR_HASH_pop_free(ent->hashes, by_dir_hash_free);
193	OPENSSL_free(ent);
194	}
195
196static void free_dir(X509_LOOKUP *lu)
197	{
198	BY_DIR *a;
199
200	a=(BY_DIR *)lu->method_data;
201	if (a->dirs != NULL)
202		sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free);
203	if (a->buffer != NULL)
204		BUF_MEM_free(a->buffer);
205	OPENSSL_free(a);
206	}
207
208static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
209	{
210	int j,len;
211	const char *s,*ss,*p;
212
213	if (dir == NULL || !*dir)
214	    {
215	    X509err(X509_F_ADD_CERT_DIR,X509_R_INVALID_DIRECTORY);
216	    return 0;
217	    }
218
219	s=dir;
220	p=s;
221	do
222		{
223		if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0'))
224			{
225			BY_DIR_ENTRY *ent;
226			ss=s;
227			s=p+1;
228			len=(int)(p-ss);
229			if (len == 0) continue;
230			for (j=0; j < sk_BY_DIR_ENTRY_num(ctx->dirs); j++)
231				{
232				ent = sk_BY_DIR_ENTRY_value(ctx->dirs, j);
233				if (strlen(ent->dir) == (size_t)len &&
234				    strncmp(ent->dir,ss,(unsigned int)len) == 0)
235					break;
236				}
237			if (j < sk_BY_DIR_ENTRY_num(ctx->dirs))
238				continue;
239			if (ctx->dirs == NULL)
240				{
241				ctx->dirs = sk_BY_DIR_ENTRY_new_null();
242				if (!ctx->dirs)
243					{
244					X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE);
245					return 0;
246					}
247				}
248			ent = OPENSSL_malloc(sizeof(BY_DIR_ENTRY));
249			if (!ent)
250				return 0;
251			ent->dir_type = type;
252			ent->hashes = sk_BY_DIR_HASH_new(by_dir_hash_cmp);
253			ent->dir = OPENSSL_malloc((unsigned int)len+1);
254			if (!ent->dir || !ent->hashes)
255				{
256				by_dir_entry_free(ent);
257				return 0;
258				}
259			strncpy(ent->dir,ss,(unsigned int)len);
260			ent->dir[len] = '\0';
261			if (!sk_BY_DIR_ENTRY_push(ctx->dirs, ent))
262				{
263				by_dir_entry_free(ent);
264				return 0;
265				}
266			}
267		} while (*p++ != '\0');
268	return 1;
269	}
270
271static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
272	     X509_OBJECT *ret)
273	{
274	BY_DIR *ctx;
275	union	{
276		struct	{
277			X509 st_x509;
278			X509_CINF st_x509_cinf;
279			} x509;
280		struct	{
281			X509_CRL st_crl;
282			X509_CRL_INFO st_crl_info;
283			} crl;
284		} data;
285	int ok=0;
286	int i,j,k;
287	unsigned long h;
288	BUF_MEM *b=NULL;
289	X509_OBJECT stmp,*tmp;
290	const char *postfix="";
291
292	if (name == NULL) return(0);
293
294	stmp.type=type;
295	if (type == X509_LU_X509)
296		{
297		data.x509.st_x509.cert_info= &data.x509.st_x509_cinf;
298		data.x509.st_x509_cinf.subject=name;
299		stmp.data.x509= &data.x509.st_x509;
300		postfix="";
301		}
302	else if (type == X509_LU_CRL)
303		{
304		data.crl.st_crl.crl= &data.crl.st_crl_info;
305		data.crl.st_crl_info.issuer=name;
306		stmp.data.crl= &data.crl.st_crl;
307		postfix="r";
308		}
309	else
310		{
311		X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE);
312		goto finish;
313		}
314
315	if ((b=BUF_MEM_new()) == NULL)
316		{
317		X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB);
318		goto finish;
319		}
320
321	ctx=(BY_DIR *)xl->method_data;
322
323	h=X509_NAME_hash(name);
324	for (i=0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++)
325		{
326		BY_DIR_ENTRY *ent;
327		int idx;
328		BY_DIR_HASH htmp, *hent;
329		ent = sk_BY_DIR_ENTRY_value(ctx->dirs, i);
330		j=strlen(ent->dir)+1+8+6+1+1;
331		if (!BUF_MEM_grow(b,j))
332			{
333			X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE);
334			goto finish;
335			}
336		if (type == X509_LU_CRL && ent->hashes)
337			{
338			htmp.hash = h;
339			CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
340			idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
341			if (idx >= 0)
342				{
343				hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
344				k = hent->suffix;
345				}
346			else
347				{
348				hent = NULL;
349				k=0;
350				}
351			CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
352			}
353		else
354			{
355			k = 0;
356			hent = NULL;
357			}
358		for (;;)
359			{
360			char c = '/';
361#ifdef OPENSSL_SYS_VMS
362			c = ent->dir[strlen(ent->dir)-1];
363			if (c != ':' && c != '>' && c != ']')
364				{
365				/* If no separator is present, we assume the
366				   directory specifier is a logical name, and
367				   add a colon.  We really should use better
368				   VMS routines for merging things like this,
369				   but this will do for now...
370				   -- Richard Levitte */
371				c = ':';
372				}
373			else
374				{
375				c = '\0';
376				}
377#endif
378			if (c == '\0')
379				{
380				/* This is special.  When c == '\0', no
381				   directory separator should be added. */
382				BIO_snprintf(b->data,b->max,
383					"%s%08lx.%s%d",ent->dir,h,
384					postfix,k);
385				}
386			else
387				{
388				BIO_snprintf(b->data,b->max,
389					"%s%c%08lx.%s%d",ent->dir,c,h,
390					postfix,k);
391				}
392#ifndef OPENSSL_NO_POSIX_IO
393#ifdef _WIN32
394#define stat _stat
395#endif
396			{
397			struct stat st;
398			if (stat(b->data,&st) < 0)
399				break;
400			}
401#endif
402			/* found one. */
403			if (type == X509_LU_X509)
404				{
405				if ((X509_load_cert_file(xl,b->data,
406					ent->dir_type)) == 0)
407					break;
408				}
409			else if (type == X509_LU_CRL)
410				{
411				if ((X509_load_crl_file(xl,b->data,
412					ent->dir_type)) == 0)
413					break;
414				}
415			/* else case will caught higher up */
416			k++;
417			}
418
419		/* we have added it to the cache so now pull
420		 * it out again */
421		CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
422		j = sk_X509_OBJECT_find(xl->store_ctx->objs,&stmp);
423		if(j != -1) tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,j);
424		else tmp = NULL;
425		CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
426
427
428		/* If a CRL, update the last file suffix added for this */
429
430		if (type == X509_LU_CRL)
431			{
432			CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
433			/* Look for entry again in case another thread added
434			 * an entry first.
435			 */
436			if (!hent)
437				{
438				htmp.hash = h;
439				idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
440				if (idx >= 0)
441					hent =
442					 sk_BY_DIR_HASH_value(ent->hashes, idx);
443				}
444			if (!hent)
445				{
446				hent = OPENSSL_malloc(sizeof(BY_DIR_HASH));
447				hent->hash = h;
448				hent->suffix = k;
449				if (!sk_BY_DIR_HASH_push(ent->hashes, hent))
450					{
451					CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
452					OPENSSL_free(hent);
453					ok = 0;
454					goto finish;
455					}
456				}
457			else if (hent->suffix < k)
458				hent->suffix = k;
459
460			CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
461
462			}
463
464		if (tmp != NULL)
465			{
466			ok=1;
467			ret->type=tmp->type;
468			memcpy(&ret->data,&tmp->data,sizeof(ret->data));
469			/* If we were going to up the reference count,
470			 * we would need to do it on a perl 'type'
471			 * basis */
472	/*		CRYPTO_add(&tmp->data.x509->references,1,
473				CRYPTO_LOCK_X509);*/
474			goto finish;
475			}
476		}
477finish:
478	if (b != NULL) BUF_MEM_free(b);
479	return(ok);
480	}
481