1/*	$NetBSD: ks_dir.c,v 1.1.1.1 2011/04/13 18:15:11 elric Exp $	*/
2
3/*
4 * Copyright (c) 2006 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include "hx_locl.h"
37#include <dirent.h>
38
39/*
40 * The DIR keyset module is strange compared to the other modules
41 * since it does lazy evaluation and really doesn't keep any local
42 * state except for the directory iteration and cert iteration of
43 * files. DIR ignores most errors so that the consumer doesn't get
44 * failes for stray files in directories.
45 */
46
47struct dircursor {
48    DIR *dir;
49    hx509_certs certs;
50    void *iter;
51};
52
53/*
54 *
55 */
56
57static int
58dir_init(hx509_context context,
59	 hx509_certs certs, void **data, int flags,
60	 const char *residue, hx509_lock lock)
61{
62    *data = NULL;
63
64    {
65	struct stat sb;
66	int ret;
67
68	ret = stat(residue, &sb);
69	if (ret == -1) {
70	    hx509_set_error_string(context, 0, ENOENT,
71				   "No such file %s", residue);
72	    return ENOENT;
73	}
74
75	if (!S_ISDIR(sb.st_mode)) {
76	    hx509_set_error_string(context, 0, ENOTDIR,
77				   "%s is not a directory", residue);
78	    return ENOTDIR;
79	}
80    }
81
82    *data = strdup(residue);
83    if (*data == NULL) {
84	hx509_clear_error_string(context);
85	return ENOMEM;
86    }
87
88    return 0;
89}
90
91static int
92dir_free(hx509_certs certs, void *data)
93{
94    free(data);
95    return 0;
96}
97
98static int
99dir_iter_start(hx509_context context,
100	       hx509_certs certs, void *data, void **cursor)
101{
102    struct dircursor *d;
103
104    *cursor = NULL;
105
106    d = calloc(1, sizeof(*d));
107    if (d == NULL) {
108	hx509_clear_error_string(context);
109	return ENOMEM;
110    }
111
112    d->dir = opendir(data);
113    if (d->dir == NULL) {
114	hx509_clear_error_string(context);
115	free(d);
116	return errno;
117    }
118    rk_cloexec_dir(d->dir);
119    d->certs = NULL;
120    d->iter = NULL;
121
122    *cursor = d;
123    return 0;
124}
125
126static int
127dir_iter(hx509_context context,
128	 hx509_certs certs, void *data, void *iter, hx509_cert *cert)
129{
130    struct dircursor *d = iter;
131    int ret = 0;
132
133    *cert = NULL;
134
135    do {
136	struct dirent *dir;
137	char *fn;
138
139	if (d->certs) {
140	    ret = hx509_certs_next_cert(context, d->certs, d->iter, cert);
141	    if (ret) {
142		hx509_certs_end_seq(context, d->certs, d->iter);
143		d->iter = NULL;
144		hx509_certs_free(&d->certs);
145		return ret;
146	    }
147	    if (*cert) {
148		ret = 0;
149		break;
150	    }
151	    hx509_certs_end_seq(context, d->certs, d->iter);
152	    d->iter = NULL;
153	    hx509_certs_free(&d->certs);
154	}
155
156	dir = readdir(d->dir);
157	if (dir == NULL) {
158	    ret = 0;
159	    break;
160	}
161	if (strcmp(dir->d_name, ".") == 0 || strcmp(dir->d_name, "..") == 0)
162	    continue;
163
164	if (asprintf(&fn, "FILE:%s/%s", (char *)data, dir->d_name) == -1)
165	    return ENOMEM;
166
167	ret = hx509_certs_init(context, fn, 0, NULL, &d->certs);
168	if (ret == 0) {
169
170	    ret = hx509_certs_start_seq(context, d->certs, &d->iter);
171	    if (ret)
172	    hx509_certs_free(&d->certs);
173	}
174	/* ignore errors */
175	if (ret) {
176	    d->certs = NULL;
177	    ret = 0;
178	}
179
180	free(fn);
181    } while(ret == 0);
182
183    return ret;
184}
185
186
187static int
188dir_iter_end(hx509_context context,
189	     hx509_certs certs,
190	     void *data,
191	     void *cursor)
192{
193    struct dircursor *d = cursor;
194
195    if (d->certs) {
196	hx509_certs_end_seq(context, d->certs, d->iter);
197	d->iter = NULL;
198	hx509_certs_free(&d->certs);
199    }
200    closedir(d->dir);
201    free(d);
202    return 0;
203}
204
205
206static struct hx509_keyset_ops keyset_dir = {
207    "DIR",
208    0,
209    dir_init,
210    NULL,
211    dir_free,
212    NULL,
213    NULL,
214    dir_iter_start,
215    dir_iter,
216    dir_iter_end
217};
218
219void
220_hx509_ks_dir_register(hx509_context context)
221{
222    _hx509_ks_register(context, &keyset_dir);
223}
224