From bd0551b22076b82a6d49e9f7a2b2e0c90a1b2326 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Fri, 05 Feb 2016 07:25:27 -0500
Subject: [PATCH] Secure also downloads of addressbook exports, managesieve script exports and Enigma keys exports

---
 plugins/password/password.php |  348 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 files changed, 326 insertions(+), 22 deletions(-)

diff --git a/plugins/password/password.php b/plugins/password/password.php
index 9239cd0..f84dc8f 100644
--- a/plugins/password/password.php
+++ b/plugins/password/password.php
@@ -6,7 +6,7 @@
  * @version @package_version@
  * @author Aleksander Machniak <alec@alec.pl>
  *
- * Copyright (C) 2005-2013, The Roundcube Dev Team
+ * 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
@@ -63,10 +63,6 @@
 
             $this->register_action('plugin.password', array($this, 'password_init'));
             $this->register_action('plugin.password-save', array($this, 'password_save'));
-
-            if (strpos($rcmail->action, 'plugin.password') === 0) {
-                $this->include_script('password.js');
-            }
         }
         else if ($rcmail->config->get('password_force_new_user')) {
             $this->add_hook('user_create', array($this, 'user_create'));
@@ -109,7 +105,8 @@
         $rcmail = rcmail::get_instance();
         $rcmail->output->set_pagetitle($this->gettext('changepasswd'));
 
-        $confirm = $rcmail->config->get('password_confirm_current');
+        $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');
 
@@ -196,15 +193,22 @@
             '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'));
+            $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());
@@ -212,16 +216,24 @@
 
         // show new password selection
         $field_id = 'newpasswd';
-        $input_newpasswd = new html_passwordfield(array('name' => '_newpasswd', 'id' => $field_id,
-            'size' => 20, 'autocomplete' => 'off'));
+        $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'));
+        $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());
@@ -244,19 +256,27 @@
             $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',
+        ));
+
         $out = html::div(array('class' => 'box'),
-            html::div(array('id' => 'prefs-title', 'class' => 'boxtitle'), $this->gettext('changepasswd')) .
-            html::div(array('class' => 'boxcontent'), $table->show() .
-            $rules .
-            html::p(null,
-                $rcmail->output->button(array(
-                    'command' => 'plugin.password-save',
-                    'type'    => 'input',
-                    'class'   => 'button mainaction',
-                    'label'   => 'save'
-            )))));
+            html::div(array('id' => 'prefs-title', 'class' => 'boxtitle'), $this->gettext('changepasswd'))
+            . html::div(array('class' => 'boxcontent'),
+                $disabled_msg . $table->show() . $rules . html::p(null, $submit_button)));
 
         $rcmail->output->add_gui_object('passform', 'password-form');
+
+        $this->include_script('password.js');
 
         return $rcmail->output->form_tag(array(
             'id'     => 'password-form',
@@ -297,6 +317,7 @@
 
         $object = new $class;
         $result = $object->save($curpass, $passwd);
+        $message = '';
 
         if (is_array($result)) {
             $message = $result['message'];
@@ -367,4 +388,287 @@
 
         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, self::random_salt(2));
+            $prefix  = '{CRYPT}';
+            break;
+
+        case 'ext_des': // for BC
+        case 'ext-des-crypt':
+            $crypted = crypt($password, '_' . self::random_salt(8));
+            $prefix  = '{CRYPT}';
+            break;
+
+        case 'md5crypt': // for BC
+        case 'md5-crypt':
+            $crypted = crypt($password, '$1$' . self::random_salt(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 . self::random_salt(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 . self::random_salt(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 . self::random_salt(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 = substr(pack('h*', md5(mt_rand())), 0, 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 = substr(pack('h*', md5(mt_rand())), 0, 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';
+            }
+
+            // use common temp dir
+            $tmp_dir = $rcmail->config->get('temp_dir');
+            $tmpfile = tempnam($tmp_dir, 'roundcube-');
+
+            $pipe = popen("$dovecotpw -s '$method' > '$tmpfile'", "w");
+            if (!$pipe) {
+                unlink($tmpfile);
+                return false;
+            }
+            else {
+                fwrite($pipe, $password . "\n", 1+strlen($password)); usleep(1000);
+                fwrite($pipe, $password . "\n", 1+strlen($password));
+                pclose($pipe);
+
+                $crypted = trim(file_get_contents($tmpfile), "\n");
+                unlink($tmpfile);
+
+                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 $crypted;
+    }
+
+    /**
+     * Used to generate a random salt for crypt-style passwords
+     *
+     * Code originaly from the phpLDAPadmin development team
+     * http://phpldapadmin.sourceforge.net/
+     */
+    static function random_salt($length)
+    {
+        $possible = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./';
+        $str      = '';
+
+        while (strlen($str) < $length) {
+            $str .= substr($possible, (rand() % strlen($possible)), 1);
+        }
+
+        return $str;
+    }
 }

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