2 * Copyright (c) 1997 - 2001 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
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11 * notice, this list of conditions and the following disclaimer.
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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.
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
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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);
57 krb5_config_free_strings(db->virtual_hostbased_princ_svcs);
63 static krb5_error_code
64 NDBM_lock(krb5_context context, HDB *db, int operation)
66 struct ndbm_db *d = db->hdb_db;
67 return hdb_lock(d->lock_fd, operation);
70 static krb5_error_code
71 NDBM_unlock(krb5_context context, HDB *db)
73 struct ndbm_db *d = db->hdb_db;
74 return hdb_unlock(d->lock_fd);
77 static krb5_error_code
78 NDBM_seq(krb5_context context, HDB *db,
79 unsigned flags, hdb_entry_ex *entry, int first)
82 struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
84 krb5_data key_data, data;
85 krb5_error_code ret = 0;
88 key = dbm_firstkey(d->db);
90 key = dbm_nextkey(d->db);
92 return HDB_ERR_NOENTRY;
93 key_data.data = key.dptr;
94 key_data.length = key.dsize;
95 ret = db->hdb_lock(context, db, HDB_RLOCK);
97 value = dbm_fetch(d->db, key);
98 db->hdb_unlock(context, db);
99 data.data = value.dptr;
100 data.length = value.dsize;
101 memset(entry, 0, sizeof(*entry));
102 if(hdb_value2entry(context, &data, &entry->entry))
103 return NDBM_seq(context, db, flags, entry, 0);
104 if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
105 ret = hdb_unseal_keys (context, db, &entry->entry);
107 hdb_free_entry (context, entry);
109 if (ret == 0 && entry->entry.principal == NULL) {
110 entry->entry.principal = malloc (sizeof(*entry->entry.principal));
111 if (entry->entry.principal == NULL) {
112 hdb_free_entry (context, entry);
114 krb5_set_error_message(context, ret, "malloc: out of memory");
116 hdb_key2principal (context, &key_data, entry->entry.principal);
123 static krb5_error_code
124 NDBM_firstkey(krb5_context context, HDB *db,unsigned flags,hdb_entry_ex *entry)
126 return NDBM_seq(context, db, flags, entry, 1);
130 static krb5_error_code
131 NDBM_nextkey(krb5_context context, HDB *db, unsigned flags,hdb_entry_ex *entry)
133 return NDBM_seq(context, db, flags, entry, 0);
136 static krb5_error_code
137 open_lock_file(krb5_context context, const char *db_name, int *fd)
142 /* lock old and new databases */
143 asprintf(&lock_file, "%s.lock", db_name);
144 if(lock_file == NULL) {
145 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
149 *fd = open(lock_file, O_RDWR | O_CREAT, 0600);
152 krb5_set_error_message(context, ret, "open(%s): %s", lock_file,
160 static krb5_error_code
161 NDBM_rename(krb5_context context, HDB *db, const char *new_name)
164 char *old_dir, *old_pag, *new_dir, *new_pag;
165 int old_lock_fd, new_lock_fd;
167 /* lock old and new databases */
168 ret = open_lock_file(context, db->hdb_name, &old_lock_fd);
172 ret = hdb_lock(old_lock_fd, HDB_WLOCK);
178 ret = open_lock_file(context, new_name, &new_lock_fd);
180 hdb_unlock(old_lock_fd);
185 ret = hdb_lock(new_lock_fd, HDB_WLOCK);
187 hdb_unlock(old_lock_fd);
193 asprintf(&old_dir, "%s.dir", db->hdb_name);
194 asprintf(&old_pag, "%s.pag", db->hdb_name);
195 asprintf(&new_dir, "%s.dir", new_name);
196 asprintf(&new_pag, "%s.pag", new_name);
198 ret = rename(old_dir, new_dir) || rename(old_pag, new_pag);
203 krb5_set_error_message(context, ret, "rename: %s", strerror(ret));
211 hdb_unlock(new_lock_fd);
212 hdb_unlock(old_lock_fd);
220 db->hdb_name = strdup(new_name);
224 static krb5_error_code
225 NDBM__get(krb5_context context, HDB *db, krb5_data key, krb5_data *reply)
227 struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
232 k.dsize = key.length;
233 code = db->hdb_lock(context, db, HDB_RLOCK);
236 v = dbm_fetch(d->db, k);
237 db->hdb_unlock(context, db);
239 return HDB_ERR_NOENTRY;
241 krb5_data_copy(reply, v.dptr, v.dsize);
245 static krb5_error_code
246 NDBM__put(krb5_context context, HDB *db, int replace,
247 krb5_data key, krb5_data value)
250 struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
255 k.dsize = key.length;
257 v.dsize = value.length;
259 code = db->hdb_lock(context, db, HDB_WLOCK);
262 code = dbm_store(d->db, k, v, replace ? DBM_REPLACE : DBM_INSERT);
263 db->hdb_unlock(context, db);
265 return HDB_ERR_EXISTS;
270 return HDB_ERR_NO_WRITE_SUPPORT;
274 static krb5_error_code
275 NDBM__del(krb5_context context, HDB *db, krb5_data key)
277 struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
283 k.dsize = key.length;
284 ret = db->hdb_lock(context, db, HDB_WLOCK);
286 code = dbm_delete(d->db, k);
287 db->hdb_unlock(context, db);
294 static krb5_error_code
295 NDBM_close(krb5_context context, HDB *db)
297 struct ndbm_db *d = db->hdb_db;
304 static krb5_error_code
305 NDBM_open(krb5_context context, HDB *db, int flags, mode_t mode)
308 struct ndbm_db *d = malloc(sizeof(*d));
311 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
315 d->db = dbm_open((char*)db->hdb_name, flags, mode);
319 krb5_set_error_message(context, ret, "dbm_open(%s): %s", db->hdb_name,
324 ret = open_lock_file(context, db->hdb_name, &d->lock_fd);
329 krb5_set_error_message(context, ret, "open(lock file): %s",
335 if((flags & O_ACCMODE) == O_RDONLY)
336 ret = hdb_check_db_format(context, db);
338 ret = hdb_init_db(context, db);
339 if(ret == HDB_ERR_NOENTRY)
342 NDBM_close(context, db);
343 krb5_set_error_message(context, ret, "hdb_open: failed %s database %s",
344 (flags & O_ACCMODE) == O_RDONLY ?
345 "checking format of" : "initialize",
352 hdb_ndbm_create(krb5_context context, HDB **db,
353 const char *filename)
355 *db = calloc(1, sizeof(**db));
357 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
361 (*db)->hdb_db = NULL;
362 (*db)->hdb_name = strdup(filename);
363 if ((*db)->hdb_name == NULL) {
366 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
369 (*db)->hdb_master_key_set = 0;
370 (*db)->hdb_openp = 0;
371 (*db)->hdb_capability_flags = HDB_CAP_F_HANDLE_ENTERPRISE_PRINCIPAL;
372 (*db)->hdb_open = NDBM_open;
373 (*db)->hdb_close = NDBM_close;
374 (*db)->hdb_fetch_kvno = _hdb_fetch_kvno;
375 (*db)->hdb_store = _hdb_store;
376 (*db)->hdb_remove = _hdb_remove;
377 (*db)->hdb_firstkey = NDBM_firstkey;
378 (*db)->hdb_nextkey= NDBM_nextkey;
379 (*db)->hdb_lock = NDBM_lock;
380 (*db)->hdb_unlock = NDBM_unlock;
381 (*db)->hdb_rename = NDBM_rename;
382 (*db)->hdb__get = NDBM__get;
383 (*db)->hdb__put = NDBM__put;
384 (*db)->hdb__del = NDBM__del;
385 (*db)->hdb_destroy = NDBM_destroy;
389 #endif /* HAVE_NDBM */