source: trunk/server/source4/heimdal/lib/hdb/db.c

Last change on this file was 745, checked in by Silvan Scherrer, 13 years ago

Samba Server: updated trunk to 3.6.0
File size: 9.3 KB
Line 
1/*
2 * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
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 "hdb_locl.h"
35
36#if HAVE_DB1
37
38#if defined(HAVE_DB_185_H)
39#include <db_185.h>
40#elif defined(HAVE_DB_H)
41#include <db.h>
42#endif
43
44static krb5_error_code
45DB_close(krb5_context context, HDB *db)
46{
47 DB *d = (DB*)db->hdb_db;
48 (*d->close)(d);
49 return 0;
50}
51
52static krb5_error_code
53DB_destroy(krb5_context context, HDB *db)
54{
55 krb5_error_code ret;
56
57 ret = hdb_clear_master_key (context, db);
58 free(db->hdb_name);
59 free(db);
60 return ret;
61}
62
63static krb5_error_code
64DB_lock(krb5_context context, HDB *db, int operation)
65{
66 DB *d = (DB*)db->hdb_db;
67 int fd = (*d->fd)(d);
68 if(fd < 0) {
69 krb5_set_error_message(context, HDB_ERR_CANT_LOCK_DB,
70 "Can't lock database: %s", db->hdb_name);
71 return HDB_ERR_CANT_LOCK_DB;
72 }
73 return hdb_lock(fd, operation);
74}
75
76static krb5_error_code
77DB_unlock(krb5_context context, HDB *db)
78{
79 DB *d = (DB*)db->hdb_db;
80 int fd = (*d->fd)(d);
81 if(fd < 0) {
82 krb5_set_error_message(context, HDB_ERR_CANT_LOCK_DB,
83 "Can't unlock database: %s", db->hdb_name);
84 return HDB_ERR_CANT_LOCK_DB;
85 }
86 return hdb_unlock(fd);
87}
88
89
90static krb5_error_code
91DB_seq(krb5_context context, HDB *db,
92 unsigned flags, hdb_entry_ex *entry, int flag)
93{
94 DB *d = (DB*)db->hdb_db;
95 DBT key, value;
96 krb5_data key_data, data;
97 int code;
98
99 code = db->hdb_lock(context, db, HDB_RLOCK);
100 if(code == -1) {
101 krb5_set_error_message(context, HDB_ERR_DB_INUSE, "Database %s in use", db->hdb_name);
102 return HDB_ERR_DB_INUSE;
103 }
104 code = (*d->seq)(d, &key, &value, flag);
105 db->hdb_unlock(context, db); /* XXX check value */
106 if(code == -1) {
107 code = errno;
108 krb5_set_error_message(context, code, "Database %s seq error: %s",
109 db->hdb_name, strerror(code));
110 return code;
111 }
112 if(code == 1) {
113 krb5_clear_error_message(context);
114 return HDB_ERR_NOENTRY;
115 }
116
117 key_data.data = key.data;
118 key_data.length = key.size;
119 data.data = value.data;
120 data.length = value.size;
121 memset(entry, 0, sizeof(*entry));
122 if (hdb_value2entry(context, &data, &entry->entry))
123 return DB_seq(context, db, flags, entry, R_NEXT);
124 if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
125 code = hdb_unseal_keys (context, db, &entry->entry);
126 if (code)
127 hdb_free_entry (context, entry);
128 }
129 if (code == 0 && entry->entry.principal == NULL) {
130 entry->entry.principal = malloc(sizeof(*entry->entry.principal));
131 if (entry->entry.principal == NULL) {
132 code = ENOMEM;
133 krb5_set_error_message(context, code, "malloc: out of memory");
134 hdb_free_entry (context, entry);
135 } else {
136 hdb_key2principal(context, &key_data, entry->entry.principal);
137 }
138 }
139 return code;
140}
141
142
143static krb5_error_code
144DB_firstkey(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
145{
146 return DB_seq(context, db, flags, entry, R_FIRST);
147}
148
149
150static krb5_error_code
151DB_nextkey(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
152{
153 return DB_seq(context, db, flags, entry, R_NEXT);
154}
155
156static krb5_error_code
157DB_rename(krb5_context context, HDB *db, const char *new_name)
158{
159 int ret;
160 char *old, *new;
161
162 asprintf(&old, "%s.db", db->hdb_name);
163 asprintf(&new, "%s.db", new_name);
164 ret = rename(old, new);
165 free(old);
166 free(new);
167 if(ret)
168 return errno;
169
170 free(db->hdb_name);
171 db->hdb_name = strdup(new_name);
172 return 0;
173}
174
175static krb5_error_code
176DB__get(krb5_context context, HDB *db, krb5_data key, krb5_data *reply)
177{
178 DB *d = (DB*)db->hdb_db;
179 DBT k, v;
180 int code;
181
182 k.data = key.data;
183 k.size = key.length;
184 code = db->hdb_lock(context, db, HDB_RLOCK);
185 if(code)
186 return code;
187 code = (*d->get)(d, &k, &v, 0);
188 db->hdb_unlock(context, db);
189 if(code < 0) {
190 code = errno;
191 krb5_set_error_message(context, code, "Database %s get error: %s",
192 db->hdb_name, strerror(code));
193 return code;
194 }
195 if(code == 1) {
196 krb5_clear_error_message(context);
197 return HDB_ERR_NOENTRY;
198 }
199
200 krb5_data_copy(reply, v.data, v.size);
201 return 0;
202}
203
204static krb5_error_code
205DB__put(krb5_context context, HDB *db, int replace,
206 krb5_data key, krb5_data value)
207{
208 DB *d = (DB*)db->hdb_db;
209 DBT k, v;
210 int code;
211
212 k.data = key.data;
213 k.size = key.length;
214 v.data = value.data;
215 v.size = value.length;
216 code = db->hdb_lock(context, db, HDB_WLOCK);
217 if(code)
218 return code;
219 code = (*d->put)(d, &k, &v, replace ? 0 : R_NOOVERWRITE);
220 db->hdb_unlock(context, db);
221 if(code < 0) {
222 code = errno;
223 krb5_set_error_message(context, code, "Database %s put error: %s",
224 db->hdb_name, strerror(code));
225 return code;
226 }
227 if(code == 1) {
228 krb5_clear_error_message(context);
229 return HDB_ERR_EXISTS;
230 }
231 return 0;
232}
233
234static krb5_error_code
235DB__del(krb5_context context, HDB *db, krb5_data key)
236{
237 DB *d = (DB*)db->hdb_db;
238 DBT k;
239 krb5_error_code code;
240 k.data = key.data;
241 k.size = key.length;
242 code = db->hdb_lock(context, db, HDB_WLOCK);
243 if(code)
244 return code;
245 code = (*d->del)(d, &k, 0);
246 db->hdb_unlock(context, db);
247 if(code == 1) {
248 code = errno;
249 krb5_set_error_message(context, code, "Database %s put error: %s",
250 db->hdb_name, strerror(code));
251 return code;
252 }
253 if(code < 0)
254 return errno;
255 return 0;
256}
257
258static krb5_error_code
259DB_open(krb5_context context, HDB *db, int flags, mode_t mode)
260{
261 char *fn;
262 krb5_error_code ret;
263
264 asprintf(&fn, "%s.db", db->hdb_name);
265 if (fn == NULL) {
266 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
267 return ENOMEM;
268 }
269 db->hdb_db = dbopen(fn, flags, mode, DB_BTREE, NULL);
270 free(fn);
271 /* try to open without .db extension */
272 if(db->hdb_db == NULL && errno == ENOENT)
273 db->hdb_db = dbopen(db->hdb_name, flags, mode, DB_BTREE, NULL);
274 if(db->hdb_db == NULL) {
275 ret = errno;
276 krb5_set_error_message(context, ret, "dbopen (%s): %s",
277 db->hdb_name, strerror(ret));
278 return ret;
279 }
280 if((flags & O_ACCMODE) == O_RDONLY)
281 ret = hdb_check_db_format(context, db);
282 else
283 ret = hdb_init_db(context, db);
284 if(ret == HDB_ERR_NOENTRY) {
285 krb5_clear_error_message(context);
286 return 0;
287 }
288 if (ret) {
289 DB_close(context, db);
290 krb5_set_error_message(context, ret, "hdb_open: failed %s database %s",
291 (flags & O_ACCMODE) == O_RDONLY ?
292 "checking format of" : "initialize",
293 db->hdb_name);
294 }
295 return ret;
296}
297
298krb5_error_code
299hdb_db_create(krb5_context context, HDB **db,
300 const char *filename)
301{
302 *db = calloc(1, sizeof(**db));
303 if (*db == NULL) {
304 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
305 return ENOMEM;
306 }
307
308 (*db)->hdb_db = NULL;
309 (*db)->hdb_name = strdup(filename);
310 if ((*db)->hdb_name == NULL) {
311 free(*db);
312 *db = NULL;
313 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
314 return ENOMEM;
315 }
316 (*db)->hdb_master_key_set = 0;
317 (*db)->hdb_openp = 0;
318 (*db)->hdb_capability_flags = HDB_CAP_F_HANDLE_ENTERPRISE_PRINCIPAL;
319 (*db)->hdb_open = DB_open;
320 (*db)->hdb_close = DB_close;
321 (*db)->hdb_fetch_kvno = _hdb_fetch_kvno;
322 (*db)->hdb_store = _hdb_store;
323 (*db)->hdb_remove = _hdb_remove;
324 (*db)->hdb_firstkey = DB_firstkey;
325 (*db)->hdb_nextkey= DB_nextkey;
326 (*db)->hdb_lock = DB_lock;
327 (*db)->hdb_unlock = DB_unlock;
328 (*db)->hdb_rename = DB_rename;
329 (*db)->hdb__get = DB__get;
330 (*db)->hdb__put = DB__put;
331 (*db)->hdb__del = DB__del;
332 (*db)->hdb_destroy = DB_destroy;
333 return 0;
334}
335
336#endif /* HAVE_DB1 */
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