From 31f657e550ab8b1ea00953cc3a26f4661ee4458c Mon Sep 17 00:00:00 2001 From: Michael Foster Date: Wed, 24 Jul 2013 11:15:55 -0400 Subject: [PATCH] Long overdue: Salted password hashes --- inc/mod/auth.php | 34 +++++++++++++++++++++------------- inc/mod/pages.php | 24 ++++++++++++++++++------ install.php | 21 ++++++++++++++++++++- install.sql | 7 ++++--- 4 files changed, 63 insertions(+), 23 deletions(-) diff --git a/inc/mod/auth.php b/inc/mod/auth.php index 173190ab..1bc27dff 100644 --- a/inc/mod/auth.php +++ b/inc/mod/auth.php @@ -29,6 +29,11 @@ function mkhash($username, $password, $salt = false) { return $hash; } +function generate_salt() { + mt_srand(microtime(true) * 100000 + memory_get_usage(true)); + return md5(uniqid(mt_rand(), true)); +} + function login($username, $password, $makehash=true) { global $mod; @@ -37,20 +42,23 @@ function login($username, $password, $makehash=true) { $password = sha1($password); } - $query = prepare("SELECT `id`,`type`,`boards` FROM `mods` WHERE `username` = :username AND `password` = :password LIMIT 1"); + $query = prepare("SELECT `id`, `type`, `boards`, `password`, `salt` FROM `mods` WHERE `username` = :username"); $query->bindValue(':username', $username); - $query->bindValue(':password', $password); $query->execute() or error(db_error($query)); - if ($user = $query->fetch()) { - return $mod = array( - 'id' => $user['id'], - 'type' => $user['type'], - 'username' => $username, - 'hash' => mkhash($username, $password), - 'boards' => explode(',', $user['boards']) - ); - } else return false; + if ($user = $query->fetch(PDO::FETCH_ASSOC)) { + if ($user['password'] === hash('sha256', $user['salt'] . $password)) { + return $mod = array( + 'id' => $user['id'], + 'type' => $user['type'], + 'username' => $username, + 'hash' => mkhash($username, $user['password']), + 'boards' => explode(',', $user['boards']) + ); + } + } + + return false; } function setCookies() { @@ -104,10 +112,10 @@ if (isset($_COOKIE[$config['cookies']['mod']])) { exit; } - $query = prepare("SELECT `id`, `type`, `boards`, `password` FROM `mods` WHERE `username` = :username LIMIT 1"); + $query = prepare("SELECT `id`, `type`, `boards`, `password` FROM `mods` WHERE `username` = :username"); $query->bindValue(':username', $cookie[0]); $query->execute() or error(db_error($query)); - $user = $query->fetch(); + $user = $query->fetch(PDO::FETCH_ASSOC); // validate password hash if ($cookie[1] !== mkhash($cookie[0], $user['password'], $cookie[2])) { diff --git a/inc/mod/pages.php b/inc/mod/pages.php index cddecad0..1ed9a94b 100644 --- a/inc/mod/pages.php +++ b/inc/mod/pages.php @@ -1407,9 +1407,13 @@ function mod_user($uid) { } if ($_POST['password'] != '') { - $query = prepare('UPDATE `mods` SET `password` = SHA1(:password) WHERE `id` = :id'); + $salt = generate_salt(); + $password = hash('sha256', $salt . sha1($_POST['password'])); + + $query = prepare('UPDATE `mods` SET `password` = :password, `salt` = :salt WHERE `id` = :id'); $query->bindValue(':id', $uid); - $query->bindValue(':password', $_POST['password']); + $query->bindValue(':password', $password); + $query->bindValue(':salt', $salt); $query->execute() or error(db_error($query)); modLog('Changed password for ' . utf8tohtml($_POST['username']) . ' (#' . $user['id'] . ')'); @@ -1430,9 +1434,13 @@ function mod_user($uid) { if (hasPermission($config['mod']['change_password']) && $uid == $mod['id'] && isset($_POST['password'])) { if ($_POST['password'] != '') { - $query = prepare('UPDATE `mods` SET `password` = SHA1(:password) WHERE `id` = :id'); + $salt = generate_salt(); + $password = hash('sha256', $salt . sha1($_POST['password'])); + + $query = prepare('UPDATE `mods` SET `password` = :password, `salt` = :salt WHERE `id` = :id'); $query->bindValue(':id', $uid); - $query->bindValue(':password', $_POST['password']); + $query->bindValue(':password', $password); + $query->bindValue(':salt', $salt); $query->execute() or error(db_error($query)); modLog('Changed own password'); @@ -1494,9 +1502,13 @@ function mod_user_new() { if ($_POST['type'] !== JANITOR && $_POST['type'] !== MOD && $_POST['type'] !== ADMIN) error(sprintf($config['error']['invalidfield'], 'type')); - $query = prepare('INSERT INTO `mods` VALUES (NULL, :username, SHA1(:password), :type, :boards)'); + $salt = generate_salt(); + $password = hash('sha256', $salt . sha1($_POST['password'])); + + $query = prepare('INSERT INTO `mods` VALUES (NULL, :username, :password, :salt, :type, :boards)'); $query->bindValue(':username', $_POST['username']); - $query->bindValue(':password', $_POST['password']); + $query->bindValue(':password', $password); + $query->bindValue(':salt', $salt); $query->bindValue(':type', $_POST['type']); $query->bindValue(':boards', implode(',', $boards)); $query->execute() or error(db_error($query)); diff --git a/install.php b/install.php index 71d1c910..3c65a4b8 100644 --- a/install.php +++ b/install.php @@ -1,7 +1,7 @@ fetch(PDO::FETCH_ASSOC)) { + if (strlen($user['password']) == 40) { + mt_srand(microtime(true) * 100000 + memory_get_usage(true)); + $salt = md5(uniqid(mt_rand(), true)); + + $user['salt'] = $salt; + $user['password'] = hash('sha256', $user['salt'] . $user['password']); + + $_query = prepare("UPDATE `mods` SET `password` = :password, `salt` = :salt WHERE `id` = :id"); + $_query->bindValue(':username', $user['id']); + $_query->bindValue(':password', $user['password']); + $_query->bindValue(':salt', $user['salt']); + $_query->execute() or error(db_error($_query)); + } + } case false: // Update version number file_write($config['has_installed'], VERSION); diff --git a/install.sql b/install.sql index 04896681..d32c3e3e 100644 --- a/install.sql +++ b/install.sql @@ -129,9 +129,10 @@ CREATE TABLE IF NOT EXISTS `modlogs` ( -- CREATE TABLE IF NOT EXISTS `mods` ( - `id` smallint(6) UNSIGNED NOT NULL AUTO_INCREMENT, + `id` smallint(6) unsigned NOT NULL AUTO_INCREMENT, `username` varchar(30) NOT NULL, - `password` char(40) NOT NULL COMMENT 'SHA1', + `password` char(64) NOT NULL COMMENT 'SHA256', + `salt` char(32) NOT NULL, `type` smallint(1) NOT NULL COMMENT '0: janitor, 1: mod, 2: admin', `boards` text NOT NULL, PRIMARY KEY (`id`), @@ -143,7 +144,7 @@ CREATE TABLE IF NOT EXISTS `mods` ( -- INSERT INTO `mods` (`id`, `username`, `password`, `type`, `boards`) VALUES -(1, 'admin', '5baa61e4c9b93f3f0682250b6cf8331b7ee68fd8', 2, '*'); +(1, 'admin', 'cedad442efeef7112fed0f50b011b2b9bf83f6898082f995f69dd7865ca19fb7', '4a44c6c55df862ae901b413feecb0d49', 2, '*'); -- --------------------------------------------------------