324 lines
8.0 KiB
C
324 lines
8.0 KiB
C
/*
|
|
* Copyright (c) 1997 - 2001 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 1.30 2001/01/30 01:24:00 assar Exp $");
|
|
|
|
#if defined(HAVE_NDBM_H) || defined(HAVE_GDBM_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 = 0;
|
|
|
|
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)) {
|
|
ret = hdb_unseal_keys (context, db, entry);
|
|
if (ret)
|
|
hdb_free_entry (context, entry);
|
|
}
|
|
if (entry->principal == NULL) {
|
|
entry->principal = malloc (sizeof(*entry->principal));
|
|
if (entry->principal == NULL) {
|
|
ret = ENOMEM;
|
|
hdb_free_entry (context, entry);
|
|
} else {
|
|
hdb_key2principal (context, &key_data, entry->principal);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
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
|