2 * Copyright (c) 2006 - 2007 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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.
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.
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
34 #include "krb5_locl.h"
44 struct krb5_plugin *next;
48 enum krb5_plugin_type type;
54 static HEIMDAL_MUTEX plugin_mutex = HEIMDAL_MUTEX_INITIALIZER;
55 static struct plugin *registered = NULL;
57 static const char *sysplugin_dirs[] = {
58 LIBDIR "/plugin/krb5",
60 "/System/Library/KerberosPlugins/KerberosFrameworkPlugins",
70 _krb5_plugin_get_symbol(struct krb5_plugin *p)
76 _krb5_plugin_get_next(struct krb5_plugin *p)
87 static krb5_error_code
88 loadlib(krb5_context context,
89 enum krb5_plugin_type type,
92 struct krb5_plugin **e)
94 *e = calloc(1, sizeof(**e));
96 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
107 (*e)->dsohandle = dlopen(lib, RTLD_LOCAL|RTLD_LAZY);
108 if ((*e)->dsohandle == NULL) {
111 krb5_set_error_message(context, ENOMEM, "Failed to load %s: %s",
116 /* dlsym doesn't care about the type */
117 (*e)->symbol = dlsym((*e)->dsohandle, name);
118 if ((*e)->symbol == NULL) {
119 dlclose((*e)->dsohandle);
121 krb5_clear_error_message(context);
127 #endif /* HAVE_DLOPEN */
130 * Register a plugin symbol name of specific type.
131 * @param context a Keberos context
132 * @param type type of plugin symbol
133 * @param name name of plugin symbol
134 * @param symbol a pointer to the named symbol
135 * @return In case of error a non zero error com_err error is returned
136 * and the Kerberos error string is set.
138 * @ingroup krb5_support
142 krb5_plugin_register(krb5_context context,
143 enum krb5_plugin_type type,
149 /* check for duplicates */
150 for (e = registered; e != NULL; e = e->next)
151 if (e->type == type && strcmp(e->name,name)== 0 && e->symbol == symbol)
154 e = calloc(1, sizeof(*e));
156 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
160 e->name = strdup(name);
161 if (e->name == NULL) {
163 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
168 HEIMDAL_MUTEX_lock(&plugin_mutex);
169 e->next = registered;
171 HEIMDAL_MUTEX_unlock(&plugin_mutex);
177 _krb5_plugin_find(krb5_context context,
178 enum krb5_plugin_type type,
180 struct krb5_plugin **list)
182 struct krb5_plugin *e;
185 char **dirs = NULL, **di;
186 struct dirent *entry;
192 HEIMDAL_MUTEX_lock(&plugin_mutex);
194 for (p = registered; p != NULL; p = p->next) {
195 if (p->type != type || strcmp(p->name, name) != 0)
198 e = calloc(1, sizeof(*e));
200 HEIMDAL_MUTEX_unlock(&plugin_mutex);
202 krb5_set_error_message(context, ret, "malloc: out of memory");
205 e->symbol = p->symbol;
210 HEIMDAL_MUTEX_unlock(&plugin_mutex);
214 dirs = krb5_config_get_strings(context, NULL, "libdefaults",
217 dirs = rk_UNCONST(sysplugin_dirs);
219 for (di = dirs; *di != NULL; di++) {
224 rk_cloexec(dirfd(d));
226 while ((entry = readdir(d)) != NULL) {
227 char *n = entry->d_name;
230 if (n[0] == '.' && (n[1] == '\0' || (n[1] == '.' && n[2] == '\0')))
235 { /* support loading bundles on MacOS */
236 size_t len = strlen(n);
237 if (len > 7 && strcmp(&n[len - 7], ".bundle") == 0)
238 asprintf(&path, "%s/%s/Contents/MacOS/%.*s", *di, n, (int)(len - 7), n);
242 asprintf(&path, "%s/%s", *di, n);
246 krb5_set_error_message(context, ret, "malloc: out of memory");
249 ret = loadlib(context, type, name, path, &e);
259 if (dirs != rk_UNCONST(sysplugin_dirs))
260 krb5_config_free_strings(dirs);
261 #endif /* HAVE_DLOPEN */
264 krb5_set_error_message(context, ENOENT, "Did not find a plugin for %s", name);
271 if (dirs != rk_UNCONST(sysplugin_dirs))
272 krb5_config_free_strings(dirs);
275 _krb5_plugin_free(*list);
282 _krb5_plugin_free(struct krb5_plugin *list)
284 struct krb5_plugin *next;
288 dlclose(list->dsohandle);