--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/password/password.php	Thu Jan 04 15:50:29 2018 -0500
@@ -0,0 +1,677 @@
+<?php
+
+/**
+ * Password Plugin for Roundcube
+ *
+ * @author Aleksander Machniak <alec@alec.pl>
+ *
+ * Copyright (C) 2005-2015, The Roundcube Dev Team
+ *
+ * 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ */
+
+define('PASSWORD_CRYPT_ERROR', 1);
+define('PASSWORD_ERROR', 2);
+define('PASSWORD_CONNECT_ERROR', 3);
+define('PASSWORD_IN_HISTORY', 4);
+define('PASSWORD_CONSTRAINT_VIOLATION', 5);
+define('PASSWORD_SUCCESS', 0);
+
+/**
+ * Change password plugin
+ *
+ * Plugin that adds functionality to change a users password.
+ * It provides common functionality and user interface and supports
+ * several backends to finally update the password.
+ *
+ * For installation and configuration instructions please read the README file.
+ *
+ * @author Aleksander Machniak
+ */
+class password extends rcube_plugin
+{
+    public $task    = 'settings|login';
+    public $noframe = true;
+    public $noajax  = true;
+
+    private $newuser = false;
+
+    function init()
+    {
+        $rcmail = rcmail::get_instance();
+
+        $this->load_config();
+
+        if ($rcmail->task == 'settings') {
+            if (!$this->check_host_login_exceptions()) {
+                return;
+            }
+
+            $this->add_texts('localization/');
+
+            $this->add_hook('settings_actions', array($this, 'settings_actions'));
+
+            $this->register_action('plugin.password', array($this, 'password_init'));
+            $this->register_action('plugin.password-save', array($this, 'password_save'));
+        }
+        else if ($rcmail->config->get('password_force_new_user')) {
+            $this->add_hook('user_create', array($this, 'user_create'));
+            $this->add_hook('login_after', array($this, 'login_after'));
+        }
+    }
+
+    function settings_actions($args)
+    {
+        // register as settings action
+        $args['actions'][] = array(
+            'action' => 'plugin.password',
+            'class'  => 'password',
+            'label'  => 'password',
+            'title'  => 'changepasswd',
+            'domain' => 'password',
+        );
+
+        return $args;
+    }
+
+    function password_init()
+    {
+        $this->register_handler('plugin.body', array($this, 'password_form'));
+
+        $rcmail = rcmail::get_instance();
+        $rcmail->output->set_pagetitle($this->gettext('changepasswd'));
+
+        if (rcube_utils::get_input_value('_first', rcube_utils::INPUT_GET)) {
+            $rcmail->output->command('display_message', $this->gettext('firstloginchange'), 'notice');
+        }
+        else if (!empty($_SESSION['password_expires'])) {
+            if ($_SESSION['password_expires'] == 1) {
+                $rcmail->output->command('display_message', $this->gettext('passwdexpired'), 'error');
+            }
+            else {
+                $rcmail->output->command('display_message', $this->gettext(array(
+                        'name' => 'passwdexpirewarning',
+                        'vars' => array('expirationdatetime' => $_SESSION['password_expires'])
+                    )), 'warning');
+            }
+        }
+
+        $rcmail->output->send('plugin');
+    }
+
+    function password_save()
+    {
+        $this->register_handler('plugin.body', array($this, 'password_form'));
+
+        $rcmail = rcmail::get_instance();
+        $rcmail->output->set_pagetitle($this->gettext('changepasswd'));
+
+        $form_disabled   = $rcmail->config->get('password_disabled');
+        $confirm         = $rcmail->config->get('password_confirm_current');
+        $required_length = intval($rcmail->config->get('password_minimum_length'));
+        $check_strength  = $rcmail->config->get('password_require_nonalpha');
+
+        if (($confirm && !isset($_POST['_curpasswd'])) || !isset($_POST['_newpasswd'])) {
+            $rcmail->output->command('display_message', $this->gettext('nopassword'), 'error');
+        }
+        else {
+            $charset    = strtoupper($rcmail->config->get('password_charset', 'ISO-8859-1'));
+            $rc_charset = strtoupper($rcmail->output->get_charset());
+
+            $sespwd = $rcmail->decrypt($_SESSION['password']);
+            $curpwd = $confirm ? rcube_utils::get_input_value('_curpasswd', rcube_utils::INPUT_POST, true, $charset) : $sespwd;
+            $newpwd = rcube_utils::get_input_value('_newpasswd', rcube_utils::INPUT_POST, true);
+            $conpwd = rcube_utils::get_input_value('_confpasswd', rcube_utils::INPUT_POST, true);
+
+            // check allowed characters according to the configured 'password_charset' option
+            // by converting the password entered by the user to this charset and back to UTF-8
+            $orig_pwd = $newpwd;
+            $chk_pwd = rcube_charset::convert($orig_pwd, $rc_charset, $charset);
+            $chk_pwd = rcube_charset::convert($chk_pwd, $charset, $rc_charset);
+
+            // WARNING: Default password_charset is ISO-8859-1, so conversion will
+            // change national characters. This may disable possibility of using
+            // the same password in other MUA's.
+            // We're doing this for consistence with Roundcube core
+            $newpwd = rcube_charset::convert($newpwd, $rc_charset, $charset);
+            $conpwd = rcube_charset::convert($conpwd, $rc_charset, $charset);
+
+            if ($chk_pwd != $orig_pwd) {
+                $rcmail->output->command('display_message', $this->gettext('passwordforbidden'), 'error');
+            }
+            // other passwords validity checks
+            else if ($conpwd != $newpwd) {
+                $rcmail->output->command('display_message', $this->gettext('passwordinconsistency'), 'error');
+            }
+            else if ($confirm && $sespwd != $curpwd) {
+                $rcmail->output->command('display_message', $this->gettext('passwordincorrect'), 'error');
+            }
+            else if ($required_length && strlen($newpwd) < $required_length) {
+                $rcmail->output->command('display_message', $this->gettext(
+                    array('name' => 'passwordshort', 'vars' => array('length' => $required_length))), 'error');
+            }
+            else if ($check_strength && (!preg_match("/[0-9]/", $newpwd) || !preg_match("/[^A-Za-z0-9]/", $newpwd))) {
+                $rcmail->output->command('display_message', $this->gettext('passwordweak'), 'error');
+            }
+            // password is the same as the old one, warn user, return error
+            else if ($sespwd == $newpwd && !$rcmail->config->get('password_force_save')) {
+                $rcmail->output->command('display_message', $this->gettext('samepasswd'), 'error');
+            }
+            // try to save the password
+            else if (!($res = $this->_save($curpwd, $newpwd))) {
+                $rcmail->output->command('display_message', $this->gettext('successfullysaved'), 'confirmation');
+
+                // allow additional actions after password change (e.g. reset some backends)
+                $plugin = $rcmail->plugins->exec_hook('password_change', array(
+                    'old_pass' => $curpwd, 'new_pass' => $newpwd));
+
+                // Reset session password
+                $_SESSION['password'] = $rcmail->encrypt($plugin['new_pass']);
+
+                // Log password change
+                if ($rcmail->config->get('password_log')) {
+                    rcube::write_log('password', sprintf('Password changed for user %s (ID: %d) from %s',
+                        $rcmail->get_user_name(), $rcmail->user->ID, rcube_utils::remote_ip()));
+                }
+
+                // Remove expiration date/time
+                $rcmail->session->remove('password_expires');
+            }
+            else {
+                $rcmail->output->command('display_message', $res, 'error');
+            }
+        }
+
+        $rcmail->overwrite_action('plugin.password');
+        $rcmail->output->send('plugin');
+    }
+
+    function password_form()
+    {
+        $rcmail = rcmail::get_instance();
+
+        // add some labels to client
+        $rcmail->output->add_label(
+            'password.nopassword',
+            'password.nocurpassword',
+            'password.passwordinconsistency'
+        );
+
+        $form_disabled = $rcmail->config->get('password_disabled');
+
+        $rcmail->output->set_env('product_name', $rcmail->config->get('product_name'));
+        $rcmail->output->set_env('password_disabled', !empty($form_disabled));
+
+        $table = new html_table(array('cols' => 2));
+
+        if ($rcmail->config->get('password_confirm_current')) {
+            // show current password selection
+            $field_id = 'curpasswd';
+            $input_curpasswd = new html_passwordfield(array(
+                    'name'         => '_curpasswd',
+                    'id'           => $field_id,
+                    'size'         => 20,
+                    'autocomplete' => 'off',
+            ));
+
+            $table->add('title', html::label($field_id, rcube::Q($this->gettext('curpasswd'))));
+            $table->add(null, $input_curpasswd->show());
+        }
+
+        // show new password selection
+        $field_id = 'newpasswd';
+        $input_newpasswd = new html_passwordfield(array(
+                'name'         => '_newpasswd',
+                'id'           => $field_id,
+                'size'         => 20,
+                'autocomplete' => 'off',
+        ));
+
+        $table->add('title', html::label($field_id, rcube::Q($this->gettext('newpasswd'))));
+        $table->add(null, $input_newpasswd->show());
+
+        // show confirm password selection
+        $field_id = 'confpasswd';
+        $input_confpasswd = new html_passwordfield(array(
+                'name'         => '_confpasswd',
+                'id'           => $field_id,
+                'size'         => 20,
+                'autocomplete' => 'off',
+        ));
+
+        $table->add('title', html::label($field_id, rcube::Q($this->gettext('confpasswd'))));
+        $table->add(null, $input_confpasswd->show());
+
+        $rules = '';
+
+        $required_length = intval($rcmail->config->get('password_minimum_length'));
+        if ($required_length > 0) {
+            $rules .= html::tag('li', array('id' => 'required-length'), $this->gettext(array(
+                'name' => 'passwordshort',
+                'vars' => array('length' => $required_length)
+            )));
+        }
+
+        if ($rcmail->config->get('password_require_nonalpha')) {
+            $rules .= html::tag('li', array('id' => 'require-nonalpha'), $this->gettext('passwordweak'));
+        }
+
+        if (!empty($rules)) {
+            $rules = html::tag('ul', array('id' => 'ruleslist'), $rules);
+        }
+
+        $disabled_msg = '';
+        if ($form_disabled) {
+            $disabled_msg = is_string($form_disabled) ? $form_disabled : $this->gettext('disablednotice');
+            $disabled_msg = html::div(array('class' => 'boxwarning', 'id' => 'password-notice'), $disabled_msg);
+        }
+
+        $submit_button = $rcmail->output->button(array(
+                'command' => 'plugin.password-save',
+                'type'    => 'input',
+                'class'   => 'button mainaction',
+                'label'   => 'save',
+        ));
+        $form_buttons = html::p(array('class' => 'formbuttons'), $submit_button);
+
+        $out = html::div(array('class' => 'box'),
+            html::div(array('id' => 'prefs-title', 'class' => 'boxtitle'), $this->gettext('changepasswd'))
+            . html::div(array('class' => 'boxcontent'),
+                $disabled_msg . $table->show() . $rules . $form_buttons));
+
+        $rcmail->output->add_gui_object('passform', 'password-form');
+
+        $this->include_script('password.js');
+
+        return $rcmail->output->form_tag(array(
+            'id'     => 'password-form',
+            'name'   => 'password-form',
+            'method' => 'post',
+            'action' => './?_task=settings&_action=plugin.password-save',
+        ), $out);
+    }
+
+    private function _save($curpass, $passwd)
+    {
+        $config = rcmail::get_instance()->config;
+        $driver = $config->get('password_driver', 'sql');
+        $class  = "rcube_{$driver}_password";
+        $file   = $this->home . "/drivers/$driver.php";
+
+        if (!file_exists($file)) {
+            rcube::raise_error(array(
+                'code' => 600,
+                'type' => 'php',
+                'file' => __FILE__, 'line' => __LINE__,
+                'message' => "Password plugin: Unable to open driver file ($file)"
+            ), true, false);
+            return $this->gettext('internalerror');
+        }
+
+        include_once $file;
+
+        if (!class_exists($class, false) || !method_exists($class, 'save')) {
+            rcube::raise_error(array(
+                'code' => 600,
+                'type' => 'php',
+                'file' => __FILE__, 'line' => __LINE__,
+                'message' => "Password plugin: Broken driver $driver"
+            ), true, false);
+            return $this->gettext('internalerror');
+        }
+
+        $object = new $class;
+        $result = $object->save($curpass, $passwd);
+        $message = '';
+
+        if (is_array($result)) {
+            $message = $result['message'];
+            $result  = $result['code'];
+        }
+
+        switch ($result) {
+            case PASSWORD_SUCCESS:
+                return;
+            case PASSWORD_CRYPT_ERROR:
+                $reason = $this->gettext('crypterror');
+                break;
+            case PASSWORD_CONNECT_ERROR:
+                $reason = $this->gettext('connecterror');
+                break;
+            case PASSWORD_IN_HISTORY:
+                $reason = $this->gettext('passwdinhistory');
+                break;
+            case PASSWORD_CONSTRAINT_VIOLATION:
+                $reason = $this->gettext('passwdconstraintviolation');
+                break;
+            case PASSWORD_ERROR:
+            default:
+                $reason = $this->gettext('internalerror');
+        }
+
+        if ($message) {
+            $reason .= ' ' . $message;
+        }
+
+        return $reason;
+    }
+
+    function user_create($args)
+    {
+        $this->newuser = true;
+        return $args;
+    }
+
+    function login_after($args)
+    {
+        if ($this->newuser && $this->check_host_login_exceptions()) {
+            $args['_task']   = 'settings';
+            $args['_action'] = 'plugin.password';
+            $args['_first']  = 'true';
+        }
+
+        return $args;
+    }
+
+    // Check if host and login is allowed to change the password, false = not allowed, true = not allowed
+    private function check_host_login_exceptions()
+    {
+        $rcmail = rcmail::get_instance();
+
+        // Host exceptions
+        $hosts = $rcmail->config->get('password_hosts');
+        if (!empty($hosts) && !in_array($_SESSION['storage_host'], (array) $hosts)) {
+            return false;
+        }
+
+        // Login exceptions
+        if ($exceptions = $rcmail->config->get('password_login_exceptions')) {
+            $exceptions = array_map('trim', (array) $exceptions);
+            $exceptions = array_filter($exceptions);
+            $username   = $_SESSION['username'];
+
+            foreach ($exceptions as $ec) {
+                if ($username === $ec) {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * Hashes a password and returns the hash based on the specified method
+     *
+     * Parts of the code originally from the phpLDAPadmin development team
+     * http://phpldapadmin.sourceforge.net/
+     *
+     * @param string      Clear password
+     * @param string      Hashing method
+     * @param bool|string Prefix string or TRUE to add a default prefix
+     *
+     * @return string Hashed password
+     */
+    static function hash_password($password, $method = '', $prefixed = true)
+    {
+        $method = strtolower($method);
+        $rcmail = rcmail::get_instance();
+        $prefix = '';
+        $crypted = '';
+        $default = false;
+
+        if (empty($method) || $method == 'default') {
+            $method   = $rcmail->config->get('password_algorithm');
+            $prefixed = $rcmail->config->get('password_algorithm_prefix');
+            $default  = true;
+        }
+        else if ($method == 'crypt') { // deprecated
+            if (!($method = $rcmail->config->get('password_crypt_hash'))) {
+                $method = 'md5';
+            }
+
+            if (!strpos($method, '-crypt')) {
+                $method .= '-crypt';
+            }
+        }
+
+        switch ($method) {
+        case 'des':
+        case 'des-crypt':
+            $crypted = crypt($password, rcube_utils::random_bytes(2));
+            $prefix  = '{CRYPT}';
+            break;
+
+        case 'ext_des': // for BC
+        case 'ext-des-crypt':
+            $crypted = crypt($password, '_' . rcube_utils::random_bytes(8));
+            $prefix  = '{CRYPT}';
+            break;
+
+        case 'md5crypt': // for BC
+        case 'md5-crypt':
+            $crypted = crypt($password, '$1$' . rcube_utils::random_bytes(9));
+            $prefix  = '{CRYPT}';
+            break;
+
+        case 'sha256-crypt':
+            $rounds = (int) $rcmail->config->get('password_crypt_rounds');
+            $prefix = '$5$';
+
+            if ($rounds > 1000) {
+                $prefix .= 'rounds=' . $rounds . '$';
+            }
+
+            $crypted = crypt($password, $prefix . rcube_utils::random_bytes(16));
+            $prefix  = '{CRYPT}';
+            break;
+
+        case 'sha512-crypt':
+            $rounds = (int) $rcmail->config->get('password_crypt_rounds');
+            $prefix = '$6$';
+
+            if ($rounds > 1000) {
+                $prefix .= 'rounds=' . $rounds . '$';
+            }
+
+            $crypted = crypt($password, $prefix . rcube_utils::random_bytes(16));
+            $prefix  = '{CRYPT}';
+            break;
+
+        case 'blowfish': // for BC
+        case 'blowfish-crypt':
+            $cost   = (int) $rcmail->config->get('password_blowfish_cost');
+            $cost   = $cost < 4 || $cost > 31 ? 12 : $cost;
+            $prefix = sprintf('$2a$%02d$', $cost);
+
+            $crypted = crypt($password, $prefix . rcube_utils::random_bytes(22));
+            $prefix  = '{CRYPT}';
+            break;
+
+        case 'md5':
+            $crypted = base64_encode(pack('H*', md5($password)));
+            $prefix  = '{MD5}';
+            break;
+
+        case 'sha':
+            if (function_exists('sha1')) {
+                $crypted = pack('H*', sha1($password));
+            }
+            else if (function_exists('hash')) {
+                $crypted = hash('sha1', $password, true);
+            }
+            else if (function_exists('mhash')) {
+                $crypted = mhash(MHASH_SHA1, $password);
+            }
+            else {
+                rcube::raise_error(array(
+                    'code' => 600, 'file' => __FILE__, 'line' => __LINE__,
+                    'message' => "Password plugin: Your PHP install does not have the mhash()/hash() nor sha1() function"
+                ), true, true);
+            }
+
+            $crypted = base64_encode($crypted);
+            $prefix = '{SHA}';
+            break;
+
+        case 'ssha':
+            $salt = rcube_utils::random_bytes(8);
+
+            if (function_exists('mhash') && function_exists('mhash_keygen_s2k')) {
+                $salt    = mhash_keygen_s2k(MHASH_SHA1, $password, $salt, 4);
+                $crypted = mhash(MHASH_SHA1, $password . $salt);
+            }
+            else if (function_exists('sha1')) {
+                $salt    = substr(pack("H*", sha1($salt . $password)), 0, 4);
+                $crypted = sha1($password . $salt, true);
+            }
+            else if (function_exists('hash')) {
+                $salt    = substr(pack("H*", hash('sha1', $salt . $password)), 0, 4);
+                $crypted = hash('sha1', $password . $salt, true);
+            }
+            else {
+                rcube::raise_error(array(
+                    'code' => 600, 'file' => __FILE__, 'line' => __LINE__,
+                    'message' => "Password plugin: Your PHP install does not have the mhash()/hash() nor sha1() function"
+                ), true, true);
+            }
+
+            $crypted = base64_encode($crypted . $salt);
+            $prefix  = '{SSHA}';
+            break;
+
+        case 'smd5':
+            $salt = rcube_utils::random_bytes(8);
+
+            if (function_exists('mhash') && function_exists('mhash_keygen_s2k')) {
+                $salt    = mhash_keygen_s2k(MHASH_MD5, $password, $salt, 4);
+                $crypted = mhash(MHASH_MD5, $password . $salt);
+            }
+            else if (function_exists('hash')) {
+                $salt    = substr(pack("H*", hash('md5', $salt . $password)), 0, 4);
+                $crypted = hash('md5', $password . $salt, true);
+            }
+            else {
+                $salt    = substr(pack("H*", md5($salt . $password)), 0, 4);
+                $crypted = md5($password . $salt, true);
+            }
+
+            $crypted = base64_encode($crypted . $salt);
+            $prefix  = '{SMD5}';
+            break;
+
+        case 'samba':
+            if (function_exists('hash')) {
+                $crypted = hash('md4', rcube_charset::convert($password, RCUBE_CHARSET, 'UTF-16LE'));
+                $crypted = strtoupper($crypted);
+            }
+            else {
+                rcube::raise_error(array(
+                    'code' => 600, 'file' => __FILE__, 'line' => __LINE__,
+                    'message' => "Password plugin: Your PHP install does not have hash() function"
+                ), true, true);
+            }
+            break;
+
+        case 'ad':
+            $crypted = rcube_charset::convert('"' . $password . '"', RCUBE_CHARSET, 'UTF-16LE');
+            break;
+
+        case 'cram-md5': // deprecated
+            require_once __DIR__ . '/../helpers/dovecot_hmacmd5.php';
+            $crypted = dovecot_hmacmd5($password);
+            $prefix  = '{CRAM-MD5}';
+            break;
+
+        case 'dovecot':
+            if (!($dovecotpw = $rcmail->config->get('password_dovecotpw'))) {
+                $dovecotpw = 'dovecotpw';
+            }
+            if (!($method = $rcmail->config->get('password_dovecotpw_method'))) {
+                $method = 'CRAM-MD5';
+            }
+
+            $spec = array(0 => array('pipe', 'r'), 1 => array('pipe', 'w'), 2 => array('file', '/dev/null', 'a'));
+            $pipe = proc_open("$dovecotpw -s '$method'", $spec, $pipes);
+
+            if (!is_resource($pipe)) {
+                return false;
+            }
+
+            fwrite($pipes[0], $password . "\n", 1+strlen($password));
+            usleep(1000);
+            fwrite($pipes[0], $password . "\n", 1+strlen($password));
+
+            $crypted = trim(stream_get_contents($pipes[1]), "\n");
+
+            fclose($pipes[0]);
+            fclose($pipes[1]);
+            proc_close($pipe);
+
+            if (!preg_match('/^\{' . $method . '\}/', $crypted)) {
+                return false;
+            }
+
+            if (!$default) {
+                $prefixed = (bool) $rcmail->config->get('password_dovecotpw_with_method');
+            }
+
+            if (!$prefixed) {
+                $crypted = trim(str_replace('{' . $method . '}', '', $crypted));
+            }
+
+            $prefixed = false;
+
+            break;
+
+        case 'hash': // deprecated
+            if (!extension_loaded('hash')) {
+                rcube::raise_error(array(
+                    'code' => 600, 'file' => __FILE__, 'line' => __LINE__,
+                    'message' => "Password plugin: 'hash' extension not loaded!"
+                ), true, true);
+            }
+
+            if (!($hash_algo = strtolower($rcmail->config->get('password_hash_algorithm')))) {
+                $hash_algo = 'sha1';
+            }
+
+            $crypted = hash($hash_algo, $password);
+
+            if ($rcmail->config->get('password_hash_base64')) {
+                $crypted = base64_encode(pack('H*', $crypted));
+            }
+
+            break;
+
+        case 'clear':
+            $crypted = $password;
+        }
+
+        if ($crypted === null || $crypted === false) {
+            return false;
+        }
+
+        if ($prefixed && $prefixed !== true) {
+            $prefix   = $prefixed;
+            $prefixed = true;
+        }
+
+        if ($prefixed === true && $prefix) {
+            $crypted = $prefix . $crypted;
+        }
+
+        return $crypted;
+    }
+}