2 * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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7 * modification, are permitted provided that the following conditions
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14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
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18 * may be used to endorse or promote products derived from this software
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38 #if defined(HAVE_GDBM_NDBM_H)
39 #include <gdbm/ndbm.h>
40 #define WRITE_SUPPORT 1
41 #elif defined(HAVE_NDBM_H)
43 #elif defined(HAVE_DBM_H)
44 #define WRITE_SUPPORT 1
53 static krb5_error_code
54 NDBM_destroy(krb5_context context, HDB *db)
56 hdb_clear_master_key (context, db);
62 static krb5_error_code
63 NDBM_lock(krb5_context context, HDB *db, int operation)
65 struct ndbm_db *d = db->hdb_db;
66 return hdb_lock(d->lock_fd, operation);
69 static krb5_error_code
70 NDBM_unlock(krb5_context context, HDB *db)
72 struct ndbm_db *d = db->hdb_db;
73 return hdb_unlock(d->lock_fd);
76 static krb5_error_code
77 NDBM_seq(krb5_context context, HDB *db,
78 unsigned flags, hdb_entry_ex *entry, int first)
81 struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
83 krb5_data key_data, data;
84 krb5_error_code ret = 0;
87 key = dbm_firstkey(d->db);
89 key = dbm_nextkey(d->db);
91 return HDB_ERR_NOENTRY;
92 key_data.data = key.dptr;
93 key_data.length = key.dsize;
94 ret = db->hdb_lock(context, db, HDB_RLOCK);
96 value = dbm_fetch(d->db, key);
97 db->hdb_unlock(context, db);
98 data.data = value.dptr;
99 data.length = value.dsize;
100 memset(entry, 0, sizeof(*entry));
101 if(hdb_value2entry(context, &data, &entry->entry))
102 return NDBM_seq(context, db, flags, entry, 0);
103 if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
104 ret = hdb_unseal_keys (context, db, &entry->entry);
106 hdb_free_entry (context, entry);
108 if (ret == 0 && entry->entry.principal == NULL) {
109 entry->entry.principal = malloc (sizeof(*entry->entry.principal));
110 if (entry->entry.principal == NULL) {
111 hdb_free_entry (context, entry);
113 krb5_set_error_message(context, ret, "malloc: out of memory");
115 hdb_key2principal (context, &key_data, entry->entry.principal);
122 static krb5_error_code
123 NDBM_firstkey(krb5_context context, HDB *db,unsigned flags,hdb_entry_ex *entry)
125 return NDBM_seq(context, db, flags, entry, 1);
129 static krb5_error_code
130 NDBM_nextkey(krb5_context context, HDB *db, unsigned flags,hdb_entry_ex *entry)
132 return NDBM_seq(context, db, flags, entry, 0);
135 static krb5_error_code
136 open_lock_file(krb5_context context, const char *db_name, int *fd)
140 /* lock old and new databases */
141 asprintf(&lock_file, "%s.lock", db_name);
142 if(lock_file == NULL) {
143 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
147 *fd = open(lock_file, O_RDWR | O_CREAT, 0600);
151 krb5_set_error_message(context, ret, "open(%s): %s", lock_file,
159 static krb5_error_code
160 NDBM_rename(krb5_context context, HDB *db, const char *new_name)
163 char *old_dir, *old_pag, *new_dir, *new_pag;
164 int old_lock_fd, new_lock_fd;
166 /* lock old and new databases */
167 ret = open_lock_file(context, db->hdb_name, &old_lock_fd);
171 ret = hdb_lock(old_lock_fd, HDB_WLOCK);
177 ret = open_lock_file(context, new_name, &new_lock_fd);
179 hdb_unlock(old_lock_fd);
184 ret = hdb_lock(new_lock_fd, HDB_WLOCK);
186 hdb_unlock(old_lock_fd);
192 asprintf(&old_dir, "%s.dir", db->hdb_name);
193 asprintf(&old_pag, "%s.pag", db->hdb_name);
194 asprintf(&new_dir, "%s.dir", new_name);
195 asprintf(&new_pag, "%s.pag", new_name);
197 ret = rename(old_dir, new_dir) || rename(old_pag, new_pag);
202 krb5_set_error_message(context, ret, "rename: %s", strerror(ret));
210 hdb_unlock(new_lock_fd);
211 hdb_unlock(old_lock_fd);
219 db->hdb_name = strdup(new_name);
223 static krb5_error_code
224 NDBM__get(krb5_context context, HDB *db, krb5_data key, krb5_data *reply)
226 struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
231 k.dsize = key.length;
232 code = db->hdb_lock(context, db, HDB_RLOCK);
235 v = dbm_fetch(d->db, k);
236 db->hdb_unlock(context, db);
238 return HDB_ERR_NOENTRY;
240 krb5_data_copy(reply, v.dptr, v.dsize);
244 static krb5_error_code
245 NDBM__put(krb5_context context, HDB *db, int replace,
246 krb5_data key, krb5_data value)
249 struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
254 k.dsize = key.length;
256 v.dsize = value.length;
258 code = db->hdb_lock(context, db, HDB_WLOCK);
261 code = dbm_store(d->db, k, v, replace ? DBM_REPLACE : DBM_INSERT);
262 db->hdb_unlock(context, db);
264 return HDB_ERR_EXISTS;
269 return HDB_ERR_NO_WRITE_SUPPORT;
273 static krb5_error_code
274 NDBM__del(krb5_context context, HDB *db, krb5_data key)
276 struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
282 k.dsize = key.length;
283 ret = db->hdb_lock(context, db, HDB_WLOCK);
285 code = dbm_delete(d->db, k);
286 db->hdb_unlock(context, db);
293 static krb5_error_code
294 NDBM_close(krb5_context context, HDB *db)
296 struct ndbm_db *d = db->hdb_db;
303 static krb5_error_code
304 NDBM_open(krb5_context context, HDB *db, int flags, mode_t mode)
307 struct ndbm_db *d = malloc(sizeof(*d));
310 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
314 d->db = dbm_open((char*)db->hdb_name, flags, mode);
318 krb5_set_error_message(context, ret, "dbm_open(%s): %s", db->hdb_name,
323 ret = open_lock_file(context, db->hdb_name, &d->lock_fd);
328 krb5_set_error_message(context, ret, "open(lock file): %s",
334 if((flags & O_ACCMODE) == O_RDONLY)
335 ret = hdb_check_db_format(context, db);
337 ret = hdb_init_db(context, db);
338 if(ret == HDB_ERR_NOENTRY)
341 NDBM_close(context, db);
342 krb5_set_error_message(context, ret, "hdb_open: failed %s database %s",
343 (flags & O_ACCMODE) == O_RDONLY ?
344 "checking format of" : "initialize",
351 hdb_ndbm_create(krb5_context context, HDB **db,
352 const char *filename)
354 *db = calloc(1, sizeof(**db));
356 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
360 (*db)->hdb_db = NULL;
361 (*db)->hdb_name = strdup(filename);
362 if ((*db)->hdb_name == NULL) {
365 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
368 (*db)->hdb_master_key_set = 0;
369 (*db)->hdb_openp = 0;
370 (*db)->hdb_capability_flags = HDB_CAP_F_HANDLE_ENTERPRISE_PRINCIPAL;
371 (*db)->hdb_open = NDBM_open;
372 (*db)->hdb_close = NDBM_close;
373 (*db)->hdb_fetch_kvno = _hdb_fetch_kvno;
374 (*db)->hdb_store = _hdb_store;
375 (*db)->hdb_remove = _hdb_remove;
376 (*db)->hdb_firstkey = NDBM_firstkey;
377 (*db)->hdb_nextkey= NDBM_nextkey;
378 (*db)->hdb_lock = NDBM_lock;
379 (*db)->hdb_unlock = NDBM_unlock;
380 (*db)->hdb_rename = NDBM_rename;
381 (*db)->hdb__get = NDBM__get;
382 (*db)->hdb__put = NDBM__put;
383 (*db)->hdb__del = NDBM__del;
384 (*db)->hdb_destroy = NDBM_destroy;
388 #endif /* HAVE_NDBM */