1/*
2 * Copyright (c) 2006 Kungliga Tekniska H�gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "hx_locl.h"
35RCSID("$Id: ks_dir.c 19778 2007-01-09 10:52:13Z lha $");
36#include <dirent.h>
37
38/*
39 * The DIR keyset module is strange compared to the other modules
40 * since it does lazy evaluation and really doesn't keep any local
41 * state except for the directory iteration and cert iteration of
42 * files. DIR ignores most errors so that the consumer doesn't get
43 * failes for stray files in directories.
44 */
45
46struct dircursor {
47    DIR *dir;
48    hx509_certs certs;
49    void *iter;
50};
51
52/*
53 *
54 */
55
56static int
57dir_init(hx509_context context,
58	 hx509_certs certs, void **data, int flags,
59	 const char *residue, hx509_lock lock)
60{
61    *data = NULL;
62
63    {
64	struct stat sb;
65	int ret;
66
67	ret = stat(residue, &sb);
68	if (ret == -1) {
69	    hx509_set_error_string(context, 0, ENOENT,
70				   "No such file %s", residue);
71	    return ENOENT;
72	}
73
74	if ((sb.st_mode & S_IFDIR) == 0) {
75	    hx509_set_error_string(context, 0, ENOTDIR,
76				   "%s is not a directory", residue);
77	    return ENOTDIR;
78	}
79    }
80
81    *data = strdup(residue);
82    if (*data == NULL) {
83	hx509_clear_error_string(context);
84	return ENOMEM;
85    }
86
87    return 0;
88}
89
90static int
91dir_free(hx509_certs certs, void *data)
92{
93    free(data);
94    return 0;
95}
96
97
98
99static int
100dir_iter_start(hx509_context context,
101	       hx509_certs certs, void *data, void **cursor)
102{
103    struct dircursor *d;
104
105    *cursor = NULL;
106
107    d = calloc(1, sizeof(*d));
108    if (d == NULL) {
109	hx509_clear_error_string(context);
110	return ENOMEM;
111    }
112
113    d->dir = opendir(data);
114    if (d->dir == NULL) {
115	hx509_clear_error_string(context);
116	free(d);
117	return errno;
118    }
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