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-rw-r--r--crypto/heimdal/lib/hdb/ndbm.c316
1 files changed, 316 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/hdb/ndbm.c b/crypto/heimdal/lib/hdb/ndbm.c
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+++ b/crypto/heimdal/lib/hdb/ndbm.c
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+/*
+ * Copyright (c) 1997, 1998, 1999 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "hdb_locl.h"
+
+RCSID("$Id: ndbm.c,v 1.26 1999/12/02 17:05:05 joda Exp $");
+
+#ifdef HAVE_NDBM_H
+
+struct ndbm_db {
+ DBM *db;
+ int lock_fd;
+};
+
+static krb5_error_code
+NDBM_destroy(krb5_context context, HDB *db)
+{
+ krb5_error_code ret;
+
+ ret = hdb_clear_master_key (context, db);
+ free(db->name);
+ free(db);
+ return 0;
+}
+
+static krb5_error_code
+NDBM_lock(krb5_context context, HDB *db, int operation)
+{
+ struct ndbm_db *d = db->db;
+ return hdb_lock(d->lock_fd, operation);
+}
+
+static krb5_error_code
+NDBM_unlock(krb5_context context, HDB *db)
+{
+ struct ndbm_db *d = db->db;
+ return hdb_unlock(d->lock_fd);
+}
+
+static krb5_error_code
+NDBM_seq(krb5_context context, HDB *db,
+ unsigned flags, hdb_entry *entry, int first)
+
+{
+ struct ndbm_db *d = (struct ndbm_db *)db->db;
+ datum key, value;
+ krb5_data key_data, data;
+ krb5_error_code ret;
+
+ if(first)
+ key = dbm_firstkey(d->db);
+ else
+ key = dbm_nextkey(d->db);
+ if(key.dptr == NULL)
+ return HDB_ERR_NOENTRY;
+ key_data.data = key.dptr;
+ key_data.length = key.dsize;
+ ret = db->lock(context, db, HDB_RLOCK);
+ if(ret) return ret;
+ value = dbm_fetch(d->db, key);
+ db->unlock(context, db);
+ data.data = value.dptr;
+ data.length = value.dsize;
+ if(hdb_value2entry(context, &data, entry))
+ return NDBM_seq(context, db, flags, entry, 0);
+ if (db->master_key_set && (flags & HDB_F_DECRYPT))
+ hdb_unseal_keys (db, entry);
+ if (entry->principal == NULL) {
+ entry->principal = malloc (sizeof(*entry->principal));
+ hdb_key2principal (context, &key_data, entry->principal);
+ }
+ return 0;
+}
+
+
+static krb5_error_code
+NDBM_firstkey(krb5_context context, HDB *db, unsigned flags, hdb_entry *entry)
+{
+ return NDBM_seq(context, db, flags, entry, 1);
+}
+
+
+static krb5_error_code
+NDBM_nextkey(krb5_context context, HDB *db, unsigned flags, hdb_entry *entry)
+{
+ return NDBM_seq(context, db, flags, entry, 0);
+}
+
+static krb5_error_code
+NDBM_rename(krb5_context context, HDB *db, const char *new_name)
+{
+ /* XXX this function will break */
+ struct ndbm_db *d = db->db;
+
+ int ret;
+ char *old_dir, *old_pag, *new_dir, *new_pag;
+ char *new_lock;
+ int lock_fd;
+
+ /* lock old and new databases */
+ ret = db->lock(context, db, HDB_WLOCK);
+ if(ret) return ret;
+ asprintf(&new_lock, "%s.lock", new_name);
+ lock_fd = open(new_lock, O_RDWR | O_CREAT, 0600);
+ free(new_lock);
+ if(lock_fd < 0) {
+ ret = errno;
+ db->unlock(context, db);
+ return ret;
+ }
+ ret = hdb_lock(lock_fd, HDB_WLOCK);
+ if(ret) {
+ db->unlock(context, db);
+ close(lock_fd);
+ return ret;
+ }
+
+ asprintf(&old_dir, "%s.dir", db->name);
+ asprintf(&old_pag, "%s.pag", db->name);
+ asprintf(&new_dir, "%s.dir", new_name);
+ asprintf(&new_pag, "%s.pag", new_name);
+
+ ret = rename(old_dir, new_dir) || rename(old_pag, new_pag);
+ free(old_dir);
+ free(old_pag);
+ free(new_dir);
+ free(new_pag);
+ hdb_unlock(lock_fd);
+ db->unlock(context, db);
+
+ if(ret) {
+ close(lock_fd);
+ return errno;
+ }
+
+ close(d->lock_fd);
+ d->lock_fd = lock_fd;
+
+ free(db->name);
+ db->name = strdup(new_name);
+ return 0;
+}
+
+static krb5_error_code
+NDBM__get(krb5_context context, HDB *db, krb5_data key, krb5_data *reply)
+{
+ struct ndbm_db *d = (struct ndbm_db *)db->db;
+ datum k, v;
+ int code;
+
+ k.dptr = key.data;
+ k.dsize = key.length;
+ code = db->lock(context, db, HDB_RLOCK);
+ if(code)
+ return code;
+ v = dbm_fetch(d->db, k);
+ db->unlock(context, db);
+ if(v.dptr == NULL)
+ return HDB_ERR_NOENTRY;
+
+ krb5_data_copy(reply, v.dptr, v.dsize);
+ return 0;
+}
+
+static krb5_error_code
+NDBM__put(krb5_context context, HDB *db, int replace,
+ krb5_data key, krb5_data value)
+{
+ struct ndbm_db *d = (struct ndbm_db *)db->db;
+ datum k, v;
+ int code;
+
+ k.dptr = key.data;
+ k.dsize = key.length;
+ v.dptr = value.data;
+ v.dsize = value.length;
+
+ code = db->lock(context, db, HDB_WLOCK);
+ if(code)
+ return code;
+ code = dbm_store(d->db, k, v, replace ? DBM_REPLACE : DBM_INSERT);
+ db->unlock(context, db);
+ if(code == 1)
+ return HDB_ERR_EXISTS;
+ if (code < 0)
+ return code;
+ return 0;
+}
+
+static krb5_error_code
+NDBM__del(krb5_context context, HDB *db, krb5_data key)
+{
+ struct ndbm_db *d = (struct ndbm_db *)db->db;
+ datum k;
+ int code;
+ krb5_error_code ret;
+
+ k.dptr = key.data;
+ k.dsize = key.length;
+ ret = db->lock(context, db, HDB_WLOCK);
+ if(ret) return ret;
+ code = dbm_delete(d->db, k);
+ db->unlock(context, db);
+ if(code < 0)
+ return errno;
+ return 0;
+}
+
+static krb5_error_code
+NDBM_open(krb5_context context, HDB *db, int flags, mode_t mode)
+{
+ krb5_error_code ret;
+ struct ndbm_db *d = malloc(sizeof(*d));
+ char *lock_file;
+
+ if(d == NULL)
+ return ENOMEM;
+ asprintf(&lock_file, "%s.lock", (char*)db->name);
+ if(lock_file == NULL) {
+ free(d);
+ return ENOMEM;
+ }
+ d->db = dbm_open((char*)db->name, flags, mode);
+ if(d->db == NULL){
+ free(d);
+ free(lock_file);
+ return errno;
+ }
+ d->lock_fd = open(lock_file, O_RDWR | O_CREAT, 0600);
+ free(lock_file);
+ if(d->lock_fd < 0){
+ dbm_close(d->db);
+ free(d);
+ return errno;
+ }
+ db->db = d;
+ if((flags & O_ACCMODE) == O_RDONLY)
+ ret = hdb_check_db_format(context, db);
+ else
+ ret = hdb_init_db(context, db);
+ if(ret == HDB_ERR_NOENTRY)
+ return 0;
+ return ret;
+}
+
+static krb5_error_code
+NDBM_close(krb5_context context, HDB *db)
+{
+ struct ndbm_db *d = db->db;
+ dbm_close(d->db);
+ close(d->lock_fd);
+ free(d);
+ return 0;
+}
+
+krb5_error_code
+hdb_ndbm_create(krb5_context context, HDB **db,
+ const char *filename)
+{
+ *db = malloc(sizeof(**db));
+ if (*db == NULL)
+ return ENOMEM;
+
+ (*db)->db = NULL;
+ (*db)->name = strdup(filename);
+ (*db)->master_key_set = 0;
+ (*db)->openp = 0;
+ (*db)->open = NDBM_open;
+ (*db)->close = NDBM_close;
+ (*db)->fetch = _hdb_fetch;
+ (*db)->store = _hdb_store;
+ (*db)->remove = _hdb_remove;
+ (*db)->firstkey = NDBM_firstkey;
+ (*db)->nextkey= NDBM_nextkey;
+ (*db)->lock = NDBM_lock;
+ (*db)->unlock = NDBM_unlock;
+ (*db)->rename = NDBM_rename;
+ (*db)->_get = NDBM__get;
+ (*db)->_put = NDBM__put;
+ (*db)->_del = NDBM__del;
+ (*db)->destroy = NDBM_destroy;
+ return 0;
+}
+
+
+#endif
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