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| Current File : //usr/src/crypto/heimdal/lib/hdb/db3.c |
/*
* Copyright (c) 1997 - 2006 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: db3.c 21610 2007-07-17 07:10:45Z lha $");
#if HAVE_DB3
#ifdef HAVE_DB4_DB_H
#include <db4/db.h>
#elif defined(HAVE_DB3_DB_H)
#include <db3/db.h>
#else
#include <db.h>
#endif
static krb5_error_code
DB_close(krb5_context context, HDB *db)
{
DB *d = (DB*)db->hdb_db;
DBC *dbcp = (DBC*)db->hdb_dbc;
(*dbcp->c_close)(dbcp);
db->hdb_dbc = 0;
(*d->close)(d, 0);
return 0;
}
static krb5_error_code
DB_destroy(krb5_context context, HDB *db)
{
krb5_error_code ret;
ret = hdb_clear_master_key (context, db);
free(db->hdb_name);
free(db);
return ret;
}
static krb5_error_code
DB_lock(krb5_context context, HDB *db, int operation)
{
DB *d = (DB*)db->hdb_db;
int fd;
if ((*d->fd)(d, &fd))
return HDB_ERR_CANT_LOCK_DB;
return hdb_lock(fd, operation);
}
static krb5_error_code
DB_unlock(krb5_context context, HDB *db)
{
DB *d = (DB*)db->hdb_db;
int fd;
if ((*d->fd)(d, &fd))
return HDB_ERR_CANT_LOCK_DB;
return hdb_unlock(fd);
}
static krb5_error_code
DB_seq(krb5_context context, HDB *db,
unsigned flags, hdb_entry_ex *entry, int flag)
{
DBT key, value;
DBC *dbcp = db->hdb_dbc;
krb5_data key_data, data;
int code;
memset(&key, 0, sizeof(DBT));
memset(&value, 0, sizeof(DBT));
if ((*db->hdb_lock)(context, db, HDB_RLOCK))
return HDB_ERR_DB_INUSE;
code = (*dbcp->c_get)(dbcp, &key, &value, flag);
(*db->hdb_unlock)(context, db); /* XXX check value */
if (code == DB_NOTFOUND)
return HDB_ERR_NOENTRY;
if (code)
return code;
key_data.data = key.data;
key_data.length = key.size;
data.data = value.data;
data.length = value.size;
memset(entry, 0, sizeof(*entry));
if (hdb_value2entry(context, &data, &entry->entry))
return DB_seq(context, db, flags, entry, DB_NEXT);
if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
code = hdb_unseal_keys (context, db, &entry->entry);
if (code)
hdb_free_entry (context, entry);
}
if (entry->entry.principal == NULL) {
entry->entry.principal = malloc(sizeof(*entry->entry.principal));
if (entry->entry.principal == NULL) {
hdb_free_entry (context, entry);
krb5_set_error_string(context, "malloc: out of memory");
return ENOMEM;
} else {
hdb_key2principal(context, &key_data, entry->entry.principal);
}
}
return 0;
}
static krb5_error_code
DB_firstkey(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
{
return DB_seq(context, db, flags, entry, DB_FIRST);
}
static krb5_error_code
DB_nextkey(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
{
return DB_seq(context, db, flags, entry, DB_NEXT);
}
static krb5_error_code
DB_rename(krb5_context context, HDB *db, const char *new_name)
{
int ret;
char *old, *new;
asprintf(&old, "%s.db", db->hdb_name);
asprintf(&new, "%s.db", new_name);
ret = rename(old, new);
free(old);
free(new);
if(ret)
return errno;
free(db->hdb_name);
db->hdb_name = strdup(new_name);
return 0;
}
static krb5_error_code
DB__get(krb5_context context, HDB *db, krb5_data key, krb5_data *reply)
{
DB *d = (DB*)db->hdb_db;
DBT k, v;
int code;
memset(&k, 0, sizeof(DBT));
memset(&v, 0, sizeof(DBT));
k.data = key.data;
k.size = key.length;
k.flags = 0;
if ((code = (*db->hdb_lock)(context, db, HDB_RLOCK)))
return code;
code = (*d->get)(d, NULL, &k, &v, 0);
(*db->hdb_unlock)(context, db);
if(code == DB_NOTFOUND)
return HDB_ERR_NOENTRY;
if(code)
return code;
krb5_data_copy(reply, v.data, v.size);
return 0;
}
static krb5_error_code
DB__put(krb5_context context, HDB *db, int replace,
krb5_data key, krb5_data value)
{
DB *d = (DB*)db->hdb_db;
DBT k, v;
int code;
memset(&k, 0, sizeof(DBT));
memset(&v, 0, sizeof(DBT));
k.data = key.data;
k.size = key.length;
k.flags = 0;
v.data = value.data;
v.size = value.length;
v.flags = 0;
if ((code = (*db->hdb_lock)(context, db, HDB_WLOCK)))
return code;
code = (*d->put)(d, NULL, &k, &v, replace ? 0 : DB_NOOVERWRITE);
(*db->hdb_unlock)(context, db);
if(code == DB_KEYEXIST)
return HDB_ERR_EXISTS;
if(code)
return errno;
return 0;
}
static krb5_error_code
DB__del(krb5_context context, HDB *db, krb5_data key)
{
DB *d = (DB*)db->hdb_db;
DBT k;
krb5_error_code code;
memset(&k, 0, sizeof(DBT));
k.data = key.data;
k.size = key.length;
k.flags = 0;
code = (*db->hdb_lock)(context, db, HDB_WLOCK);
if(code)
return code;
code = (*d->del)(d, NULL, &k, 0);
(*db->hdb_unlock)(context, db);
if(code == DB_NOTFOUND)
return HDB_ERR_NOENTRY;
if(code)
return code;
return 0;
}
static krb5_error_code
DB_open(krb5_context context, HDB *db, int flags, mode_t mode)
{
DBC *dbc = NULL;
char *fn;
krb5_error_code ret;
DB *d;
int myflags = 0;
if (flags & O_CREAT)
myflags |= DB_CREATE;
if (flags & O_EXCL)
myflags |= DB_EXCL;
if((flags & O_ACCMODE) == O_RDONLY)
myflags |= DB_RDONLY;
if (flags & O_TRUNC)
myflags |= DB_TRUNCATE;
asprintf(&fn, "%s.db", db->hdb_name);
if (fn == NULL) {
krb5_set_error_string(context, "malloc: out of memory");
return ENOMEM;
}
db_create(&d, NULL, 0);
db->hdb_db = d;
#if (DB_VERSION_MAJOR >= 4) && (DB_VERSION_MINOR >= 1)
ret = (*d->open)(db->hdb_db, NULL, fn, NULL, DB_BTREE, myflags, mode);
#else
ret = (*d->open)(db->hdb_db, fn, NULL, DB_BTREE, myflags, mode);
#endif
if (ret == ENOENT) {
/* try to open without .db extension */
#if (DB_VERSION_MAJOR >= 4) && (DB_VERSION_MINOR >= 1)
ret = (*d->open)(db->hdb_db, NULL, db->hdb_name, NULL, DB_BTREE,
myflags, mode);
#else
ret = (*d->open)(db->hdb_db, db->hdb_name, NULL, DB_BTREE,
myflags, mode);
#endif
}
if (ret) {
free(fn);
krb5_set_error_string(context, "opening %s: %s",
db->hdb_name, strerror(ret));
return ret;
}
free(fn);
ret = (*d->cursor)(d, NULL, &dbc, 0);
if (ret) {
krb5_set_error_string(context, "d->cursor: %s", strerror(ret));
return ret;
}
db->hdb_dbc = dbc;
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;
if (ret) {
DB_close(context, db);
krb5_set_error_string(context, "hdb_open: failed %s database %s",
(flags & O_ACCMODE) == O_RDONLY ?
"checking format of" : "initialize",
db->hdb_name);
}
return ret;
}
krb5_error_code
hdb_db_create(krb5_context context, HDB **db,
const char *filename)
{
*db = calloc(1, sizeof(**db));
if (*db == NULL) {
krb5_set_error_string(context, "malloc: out of memory");
return ENOMEM;
}
(*db)->hdb_db = NULL;
(*db)->hdb_name = strdup(filename);
if ((*db)->hdb_name == NULL) {
krb5_set_error_string(context, "malloc: out of memory");
free(*db);
*db = NULL;
return ENOMEM;
}
(*db)->hdb_master_key_set = 0;
(*db)->hdb_openp = 0;
(*db)->hdb_open = DB_open;
(*db)->hdb_close = DB_close;
(*db)->hdb_fetch = _hdb_fetch;
(*db)->hdb_store = _hdb_store;
(*db)->hdb_remove = _hdb_remove;
(*db)->hdb_firstkey = DB_firstkey;
(*db)->hdb_nextkey= DB_nextkey;
(*db)->hdb_lock = DB_lock;
(*db)->hdb_unlock = DB_unlock;
(*db)->hdb_rename = DB_rename;
(*db)->hdb__get = DB__get;
(*db)->hdb__put = DB__put;
(*db)->hdb__del = DB__del;
(*db)->hdb_destroy = DB_destroy;
return 0;
}
#endif /* HAVE_DB3 */