1 /* $NetBSD: context_s.c,v 1.2 2017/01/28 21:31:49 christos Exp $ */
2
3 /*
4 * Copyright (c) 1997 - 2002 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 "kadm5_locl.h"
37
38 __RCSID("$NetBSD: context_s.c,v 1.2 2017/01/28 21:31:49 christos Exp $");
39
40 static kadm5_ret_t
kadm5_s_lock(void * server_handle)41 kadm5_s_lock(void *server_handle)
42 {
43 kadm5_server_context *context = server_handle;
44 kadm5_ret_t ret;
45
46 if (context->keep_open) {
47 /*
48 * We open/close around every operation, but we retain the DB
49 * open if the DB was locked with a prior call to kadm5_lock(),
50 * so if it's open here that must be because the DB is locked.
51 */
52 heim_assert(context->db->lock_count > 0,
53 "Internal error in tracking HDB locks");
54 return KADM5_ALREADY_LOCKED;
55 }
56
57 ret = context->db->hdb_open(context->context, context->db, O_RDWR, 0);
58 if (ret)
59 return ret;
60
61 ret = context->db->hdb_lock(context->context, context->db, HDB_WLOCK);
62 if (ret) {
63 (void) context->db->hdb_close(context->context, context->db);
64 return ret;
65 }
66
67 /*
68 * Attempt to recover the log. This will generally fail on slaves,
69 * and we can't tell if we're on a slave here.
70 *
71 * Perhaps we could set a flag in the kadm5_server_context to
72 * indicate whether a read has been done without recovering the log,
73 * in which case we could fail any subsequent writes.
74 */
75 if (kadm5_log_init(context) == 0)
76 (void) kadm5_log_end(context);
77
78 context->keep_open = 1;
79 return 0;
80 }
81
82 static kadm5_ret_t
kadm5_s_unlock(void * server_handle)83 kadm5_s_unlock(void *server_handle)
84 {
85 kadm5_server_context *context = server_handle;
86 kadm5_ret_t ret;
87
88 if (!context->keep_open)
89 return KADM5_NOT_LOCKED;
90
91 context->keep_open = 0;
92 ret = context->db->hdb_unlock(context->context, context->db);
93 (void) context->db->hdb_close(context->context, context->db);
94 return ret;
95 }
96
97 static void
set_funcs(kadm5_server_context * c)98 set_funcs(kadm5_server_context *c)
99 {
100 #define SET(C, F) (C)->funcs.F = kadm5_s_ ## F
101 SET(c, chpass_principal);
102 SET(c, chpass_principal_with_key);
103 SET(c, create_principal);
104 SET(c, delete_principal);
105 SET(c, destroy);
106 SET(c, flush);
107 SET(c, get_principal);
108 SET(c, get_principals);
109 SET(c, get_privs);
110 SET(c, modify_principal);
111 SET(c, randkey_principal);
112 SET(c, rename_principal);
113 SET(c, lock);
114 SET(c, unlock);
115 SET(c, setkey_principal_3);
116 }
117
118 #ifndef NO_UNIX_SOCKETS
119
120 static void
set_socket_name(krb5_context context,struct sockaddr_un * un)121 set_socket_name(krb5_context context, struct sockaddr_un *un)
122 {
123 const char *fn = kadm5_log_signal_socket(context);
124
125 memset(un, 0, sizeof(*un));
126 un->sun_family = AF_UNIX;
127 strlcpy (un->sun_path, fn, sizeof(un->sun_path));
128
129 }
130 #else
131
132 static void
set_socket_info(krb5_context context,struct addrinfo ** info)133 set_socket_info(krb5_context context, struct addrinfo **info)
134 {
135 kadm5_log_signal_socket_info(context, 0, info);
136 }
137
138 #endif
139
140 static kadm5_ret_t
find_db_spec(kadm5_server_context * ctx)141 find_db_spec(kadm5_server_context *ctx)
142 {
143 krb5_context context = ctx->context;
144 struct hdb_dbinfo *info, *d;
145 krb5_error_code ret;
146 int aret;
147
148 if (ctx->config.realm) {
149 /* fetch the databases */
150 ret = hdb_get_dbinfo(context, &info);
151 if (ret)
152 return ret;
153
154 d = NULL;
155 while ((d = hdb_dbinfo_get_next(info, d)) != NULL) {
156 const char *p = hdb_dbinfo_get_realm(context, d);
157
158 /* match default (realm-less) */
159 if(p != NULL && strcmp(ctx->config.realm, p) != 0)
160 continue;
161
162 p = hdb_dbinfo_get_dbname(context, d);
163 if (p) {
164 ctx->config.dbname = strdup(p);
165 if (ctx->config.dbname == NULL)
166 return ENOMEM;
167 }
168
169 p = hdb_dbinfo_get_acl_file(context, d);
170 if (p) {
171 ctx->config.acl_file = strdup(p);
172 if (ctx->config.acl_file == NULL)
173 return ENOMEM;
174 }
175
176 p = hdb_dbinfo_get_mkey_file(context, d);
177 if (p) {
178 ctx->config.stash_file = strdup(p);
179 if (ctx->config.stash_file == NULL)
180 return ENOMEM;
181 }
182
183 p = hdb_dbinfo_get_log_file(context, d);
184 if (p) {
185 ctx->log_context.log_file = strdup(p);
186 if (ctx->log_context.log_file == NULL)
187 return ENOMEM;
188 }
189 break;
190 }
191 hdb_free_dbinfo(context, &info);
192 }
193
194 /* If any of the values was unset, pick up the default value */
195
196 if (ctx->config.dbname == NULL) {
197 ctx->config.dbname = strdup(hdb_default_db(context));
198 if (ctx->config.dbname == NULL)
199 return ENOMEM;
200 }
201 if (ctx->config.acl_file == NULL) {
202 aret = asprintf(&ctx->config.acl_file, "%s/kadmind.acl",
203 hdb_db_dir(context));
204 if (aret == -1)
205 return ENOMEM;
206 }
207 if (ctx->config.stash_file == NULL) {
208 aret = asprintf(&ctx->config.stash_file, "%s/m-key",
209 hdb_db_dir(context));
210 if (aret == -1)
211 return ENOMEM;
212 }
213 if (ctx->log_context.log_file == NULL) {
214 aret = asprintf(&ctx->log_context.log_file, "%s/log",
215 hdb_db_dir(context));
216 if (aret == -1)
217 return ENOMEM;
218 }
219
220 #ifndef NO_UNIX_SOCKETS
221 set_socket_name(context, &ctx->log_context.socket_name);
222 #else
223 set_socket_info(context, &ctx->log_context.socket_info);
224 #endif
225
226 return 0;
227 }
228
229 kadm5_ret_t
_kadm5_s_init_context(kadm5_server_context ** ctx,kadm5_config_params * params,krb5_context context)230 _kadm5_s_init_context(kadm5_server_context **ctx,
231 kadm5_config_params *params,
232 krb5_context context)
233 {
234 kadm5_ret_t ret = 0;
235
236 *ctx = calloc(1, sizeof(**ctx));
237 if (*ctx == NULL)
238 return ENOMEM;
239 (*ctx)->log_context.socket_fd = rk_INVALID_SOCKET;
240
241 set_funcs(*ctx);
242 (*ctx)->context = context;
243 krb5_add_et_list (context, initialize_kadm5_error_table_r);
244
245 #define is_set(M) (params && params->mask & KADM5_CONFIG_ ## M)
246 if (is_set(REALM)) {
247 (*ctx)->config.realm = strdup(params->realm);
248 if ((*ctx)->config.realm == NULL)
249 return ENOMEM;
250 } else {
251 ret = krb5_get_default_realm(context, &(*ctx)->config.realm);
252 if (ret)
253 return ret;
254 }
255 if (is_set(DBNAME)) {
256 (*ctx)->config.dbname = strdup(params->dbname);
257 if ((*ctx)->config.dbname == NULL)
258 return ENOMEM;
259 }
260 if (is_set(ACL_FILE)) {
261 (*ctx)->config.acl_file = strdup(params->acl_file);
262 if ((*ctx)->config.acl_file == NULL)
263 return ENOMEM;
264 }
265 if (is_set(STASH_FILE)) {
266 (*ctx)->config.stash_file = strdup(params->stash_file);
267 if ((*ctx)->config.stash_file == NULL)
268 return ENOMEM;
269 }
270
271 find_db_spec(*ctx);
272
273 /* PROFILE can't be specified for now */
274 /* KADMIND_PORT is supposed to be used on the server also,
275 but this doesn't make sense */
276 /* ADMIN_SERVER is client only */
277 /* ADNAME is not used at all (as far as I can tell) */
278 /* ADB_LOCKFILE ditto */
279 /* DICT_FILE */
280 /* ADMIN_KEYTAB */
281 /* MKEY_FROM_KEYBOARD is not supported */
282 /* MKEY_NAME neither */
283 /* ENCTYPE */
284 /* MAX_LIFE */
285 /* MAX_RLIFE */
286 /* EXPIRATION */
287 /* FLAGS */
288 /* ENCTYPES */
289
290 return 0;
291 }
292
293 HDB *
_kadm5_s_get_db(void * server_handle)294 _kadm5_s_get_db(void *server_handle)
295 {
296 kadm5_server_context *context = server_handle;
297 return context->db;
298 }
299