/* $NetBSD: db.c,v 1.2 2017/01/28 21:31:48 christos Exp $ */
/*
* 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"
#if defined(HAVE_DB1)
#if defined(HAVE_DB_185_H)
#include <db_185.h>
#elif defined(HAVE_DB_H)
#include <db.h>
#endif
typedef struct {
HDB hdb; /* generic members */
int lock_fd; /* DB-specific */
} DB1_HDB;
static krb5_error_code
DB_close(krb5_context context, HDB *db)
{
DB1_HDB *db1 = (DB1_HDB *)db;
DB *d = (DB*)db->hdb_db;
heim_assert(d != 0, "Closing already closed HDB");
(*d->close)(d);
db->hdb_db = 0;
if (db1->lock_fd >= 0) {
close(db1->lock_fd);
db1->lock_fd = -1;
}
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)
{
return 0;
}
static krb5_error_code
DB_unlock(krb5_context context, HDB *db)
{
return 0;
}
static krb5_error_code
DB_seq(krb5_context context, HDB *db,
unsigned flags, hdb_entry_ex *entry, int flag)
{
DB *d = (DB*)db->hdb_db;
DBT key, value;
krb5_data key_data, data;
int code;
code = (*d->seq)(d, &key, &value, flag);
if(code == -1) {
code = errno;
krb5_set_error_message(context, code, "Database %s seq error: %s",
db->hdb_name, strerror(code));
return code;
}
if(code == 1) {
krb5_clear_error_message(context);
return HDB_ERR_NOENTRY;
}
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, R_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 (code == 0 && entry->entry.principal == NULL) {
entry->entry.principal = malloc(sizeof(*entry->entry.principal));
if (entry->entry.principal == NULL) {
code = ENOMEM;
krb5_set_error_message(context, code, "malloc: out of memory");
hdb_free_entry (context, entry);
} else {
hdb_key2principal(context, &key_data, entry->entry.principal);
}
}
return code;
}
static krb5_error_code
DB_firstkey(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
{
return DB_seq(context, db, flags, entry, R_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, R_NEXT);
}
static krb5_error_code
DB_rename(krb5_context context, HDB *db, const char *new_name)
{
int ret;
char *old, *new;
if (strncmp(new_name, "db:", sizeof("db:") - 1) == 0)
new_name += sizeof("db:") - 1;
else if (strncmp(new_name, "db1:", sizeof("db1:") - 1) == 0)
new_name += sizeof("db1:") - 1;
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;
k.data = key.data;
k.size = key.length;
code = (*d->get)(d, &k, &v, 0);
if(code < 0) {
code = errno;
krb5_set_error_message(context, code, "Database %s get error: %s",
db->hdb_name, strerror(code));
return code;
}
if(code == 1) {
krb5_clear_error_message(context);
return HDB_ERR_NOENTRY;
}
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;
k.data = key.data;
k.size = key.length;
v.data = value.data;
v.size = value.length;
krb5_clear_error_message(context);
code = (*d->put)(d, &k, &v, replace ? 0 : R_NOOVERWRITE);
if(code < 0) {
code = errno;
krb5_set_error_message(context, code, "Database %s put error: %s",
db->hdb_name, strerror(code));
return code;
}
if(code == 1) {
return HDB_ERR_EXISTS;
}
code = (*d->sync)(d, 0);
if (code == -1) {
code = errno;
krb5_set_error_message(context, code, "Database %s put sync error: %s",
db->hdb_name, strerror(code));
return code;
}
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;
k.data = key.data;
k.size = key.length;
krb5_clear_error_message(context);
code = (*d->del)(d, &k, 0);
if (code == 1)
return HDB_ERR_NOENTRY;
if (code < 0) {
code = errno;
krb5_set_error_message(context, code, "Database %s del error: %s",
db->hdb_name, strerror(code));
return code;
}
code = (*d->sync)(d, 0);
if (code == -1) {
code = errno;
krb5_set_error_message(context, code, "Database %s del sync error: %s",
db->hdb_name, strerror(code));
return code;
}
return 0;
}
static DB *
_open_db(char *fn, int flags, int mode, int *fd)
{
#ifndef O_EXLOCK
int op;
int ret;
*fd = open(fn, flags, mode);
if (*fd == -1)
return NULL;
if ((flags & O_ACCMODE) == O_RDONLY)
op = LOCK_SH;
else
op = LOCK_EX;
ret = flock(*fd, op);
if (ret == -1) {
int saved_errno;
saved_errno = errno;
close(*fd);
errno = saved_errno;
return NULL;
}
#else
if ((flags & O_ACCMODE) == O_RDONLY)
flags |= O_SHLOCK;
else
flags |= O_EXLOCK;
#endif
return dbopen(fn, flags, mode, DB_BTREE, NULL);
}
static krb5_error_code
DB_open(krb5_context context, HDB *db, int flags, mode_t mode)
{
DB1_HDB *db1 = (DB1_HDB *)db;
char *fn;
krb5_error_code ret;
asprintf(&fn, "%s.db", db->hdb_name);
if (fn == NULL) {
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
return ENOMEM;
}
db->hdb_db = _open_db(fn, flags, mode, &db1->lock_fd);
free(fn);
/* try to open without .db extension */
if(db->hdb_db == NULL && errno == ENOENT)
db->hdb_db = _open_db(db->hdb_name, flags, mode, &db1->lock_fd);
if(db->hdb_db == NULL) {
krb5_set_error_message(context, errno, "dbopen (%s): %s",
db->hdb_name, strerror(errno));
return errno;
}
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) {
krb5_clear_error_message(context);
return 0;
}
if (ret) {
DB_close(context, db);
krb5_set_error_message(context, ret, "hdb_open: failed %s database %s",
(flags & O_ACCMODE) == O_RDONLY ?
"checking format of" : "initialize",
db->hdb_name);
}
return ret;
}
krb5_error_code
hdb_db1_create(krb5_context context, HDB **db,
const char *filename)
{
DB1_HDB **db1 = (DB1_HDB **)db;
*db = calloc(1, sizeof(**db1)); /* Allocate space for the larger db1 */
if (*db == NULL) {
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
return ENOMEM;
}
(*db)->hdb_db = NULL;
(*db)->hdb_name = strdup(filename);
if ((*db)->hdb_name == NULL) {
free(*db);
*db = NULL;
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
return ENOMEM;
}
(*db)->hdb_master_key_set = 0;
(*db)->hdb_openp = 0;
(*db)->hdb_capability_flags = HDB_CAP_F_HANDLE_ENTERPRISE_PRINCIPAL;
(*db)->hdb_open = DB_open;
(*db)->hdb_close = DB_close;
(*db)->hdb_fetch_kvno = _hdb_fetch_kvno;
(*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;
(*db1)->lock_fd = -1;
return 0;
}
#endif /* defined(HAVE_DB1) */