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/*
* Copyright (C) 2007 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "storage.h"
#include <library.h>
#include <crypto/hashers/hasher.h>
typedef struct private_storage_t private_storage_t;
/**
* private data of storage
*/
struct private_storage_t {
/**
* public functions
*/
storage_t public;
/**
* database connection
*/
database_t *db;
};
/**
* Implementation of storage_t.login.
*/
static int login(private_storage_t *this, char *username, char *password)
{
hasher_t *hasher;
chunk_t hash, data, hex_str;
size_t username_len, password_len;
int uid = 0;
enumerator_t *enumerator;
/* hash = SHA1( username | password ) */
hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
if (hasher == NULL)
{
return 0;
}
hash = chunk_alloca(hasher->get_hash_size(hasher));
username_len = strlen(username);
password_len = strlen(password);
data = chunk_alloca(username_len + password_len);
memcpy(data.ptr, username, username_len);
memcpy(data.ptr + username_len, password, password_len);
hasher->get_hash(hasher, data, hash.ptr);
hasher->destroy(hasher);
hex_str = chunk_to_hex(hash, NULL, FALSE);
enumerator = this->db->query(this->db,
"SELECT oid FROM users WHERE username = ? AND password = ?;",
DB_TEXT, username, DB_TEXT, hex_str.ptr,
DB_INT);
if (enumerator)
{
enumerator->enumerate(enumerator, &uid);
enumerator->destroy(enumerator);
}
free(hex_str.ptr);
return uid;
}
/**
* Implementation of storage_t.create_gateway_enumerator.
*/
static enumerator_t* create_gateway_enumerator(private_storage_t *this, int user)
{
enumerator_t *enumerator;
enumerator = this->db->query(this->db,
"SELECT gateways.oid AS gid, name, port, address FROM "
"gateways, user_gateway AS ug ON gid = ug.gateway WHERE ug.user = ?;",
DB_INT, user,
DB_INT, DB_TEXT, DB_INT, DB_TEXT);
if (!enumerator)
{
enumerator = enumerator_create_empty();
}
return enumerator;
}
/**
* Implementation of storage_t.destroy
*/
static void destroy(private_storage_t *this)
{
this->db->destroy(this->db);
free(this);
}
/*
* see header file
*/
storage_t *storage_create(char *uri)
{
private_storage_t *this = malloc_thing(private_storage_t);
this->public.login = (int(*)(storage_t*, char *username, char *password))login;
this->public.create_gateway_enumerator = (enumerator_t*(*)(storage_t*,int))create_gateway_enumerator;
this->public.destroy = (void(*)(storage_t*))destroy;
this->db = lib->db->create(lib->db, uri);
if (this->db == NULL)
{
free(this);
return NULL;
}
return &this->public;
}
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