merged the modularization branch (credentials) back to trunk

src/manager/storage.c

@@ -0,0 +1,130 @@
+/*
+ * 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.
+ *
+ * $Id$
+ */
+
+#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;
+	size_t username_len, password_len;
+	int uid = 0;
+	char *str;
+	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);
+	str = chunk_to_hex(hash, FALSE);
+	
+	enumerator = this->db->query(this->db, 
+			"SELECT oid FROM users WHERE username = ? AND password = ?;",
+			DB_TEXT, username, DB_TEXT, str,
+			DB_INT);
+	if (enumerator)
+	{
+		enumerator->enumerate(enumerator, &uid);
+		enumerator->destroy(enumerator);
+	}
+	free(str);
+	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;
+}
+