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Editing: enigma.php

<?php

/**
 +-------------------------------------------------------------------------+
 | Enigma Plugin for Roundcube                                             |
 |                                                                         |
 | Copyright (C) The Roundcube Dev Team                                    |
 |                                                                         |
 | Licensed under the GNU General Public License version 3 or              |
 | any later version with exceptions for skins & plugins.                  |
 | See the README file for a full license statement.                       |
 +-------------------------------------------------------------------------+
 | Author: Aleksander Machniak <alec@alec.pl>                              |
 +-------------------------------------------------------------------------+
*/

/**
 * This class contains only hooks and action handlers.
 * Most plugin logic is placed in enigma_engine and enigma_ui classes.
 */
class enigma extends rcube_plugin
{
    public $task = 'mail|settings|cli';
    public $rc;
    public $engine;
    public $ui;

private $env_loaded = false;

/**
     * Plugin initialization.
     */
    function init()
    {
        $this->rc = rcube::get_instance();

if ($this->rc->task == 'mail') {
            // message parse/display hooks
            $this->add_hook('message_part_structure', [$this, 'part_structure']);
            $this->add_hook('message_part_body', [$this, 'part_body']);
            $this->add_hook('message_body_prefix', [$this, 'status_message']);

$this->register_action('plugin.enigmaimport', [$this, 'import_file']);
            $this->register_action('plugin.enigmakeys', [$this, 'preferences_ui']);

// load the Enigma plugin configuration
            $this->load_config();

$enabled = $this->rc->config->get('enigma_encryption', true);

// message displaying
            if ($this->rc->action == 'show' || $this->rc->action == 'preview' || $this->rc->action == 'print') {
                $this->add_hook('message_load', [$this, 'message_load']);
                $this->add_hook('template_object_messagebody', [$this, 'message_output']);
            }
            // message composing
            else if ($enabled && $this->rc->action == 'compose') {
                $this->add_hook('message_compose_body', [$this, 'message_compose']);

$this->load_ui();
                $this->ui->init();
            }
            // message sending (and draft storing)
            else if ($enabled && $this->rc->action == 'send') {
                $this->add_hook('message_ready', [$this, 'message_ready']);
            }

$this->password_handler();
        }
        else if ($this->rc->task == 'settings') {
            // add hooks for Enigma settings
            $this->add_hook('settings_actions', [$this, 'settings_actions']);
            $this->add_hook('preferences_sections_list', [$this, 'preferences_sections_list']);
            $this->add_hook('preferences_list', [$this, 'preferences_list']);
            $this->add_hook('preferences_save', [$this, 'preferences_save']);
            $this->add_hook('identity_form', [$this, 'identity_form']);

// register handler for keys/certs management
            $this->register_action('plugin.enigmakeys', [$this, 'preferences_ui']);
//            $this->register_action('plugin.enigmacerts', [$this, 'preferences_ui']);

$this->load_ui();

if (empty($_REQUEST['_framed']) || strpos($this->rc->action, 'plugin.enigma') === 0) {
                $this->ui->add_css();
            }

$this->password_handler();
        }
        else if ($this->rc->task == 'cli') {
            $this->add_hook('user_delete_commit', [$this, 'user_delete']);
        }

$this->add_hook('refresh', [$this, 'refresh']);
    }

/**
     * Plugin environment initialization.
     */
    function load_env()
    {
        if ($this->env_loaded) {
            return;
        }

$this->env_loaded = true;

// Add include path for Enigma classes and drivers
        $include_path = $this->home . '/lib' . PATH_SEPARATOR;
        $include_path .= ini_get('include_path');
        set_include_path($include_path);

// load the Enigma plugin configuration
        $this->load_config();

// include localization (if wasn't included before)
        $this->add_texts('localization/');
    }

/**
     * Plugin UI initialization.
     */
    function load_ui($all = false)
    {
        if (!$this->ui) {
            // load config/localization
            $this->load_env();

// Load UI
            $this->ui = new enigma_ui($this, $this->home);
        }

if ($all) {
            $this->ui->add_css();
            $this->ui->add_js();
        }
    }

/**
     * Plugin engine initialization.
     */
    function load_engine()
    {
        if ($this->engine) {
            return $this->engine;
        }

// load config/localization
        $this->load_env();

return $this->engine = new enigma_engine($this);
    }

/**
     * Handler for message_part_structure hook.
     * Called for every part of the message.
     *
     * @param array $p Original parameters
     *
     * @return array Modified parameters
     */
    function part_structure($p)
    {
        $this->load_engine();

return $this->engine->part_structure($p);
    }

/**
     * Handler for message_part_body hook.
     * Called to get body of a message part.
     *
     * @param array $p Original parameters
     *
     * @return array Modified parameters
     */
    function part_body($p)
    {
        $this->load_engine();

return $this->engine->part_body($p);
    }

/**
     * Handler for settings_actions hook.
     * Adds Enigma settings section into preferences.
     *
     * @param array $args Original parameters
     *
     * @return array Modified parameters
     */
    function settings_actions($args)
    {
        // add labels
        $this->add_texts('localization/');

// register as settings action
        $args['actions'][] = [
            'action' => 'plugin.enigmakeys',
            'class'  => 'enigma keys',
            'label'  => 'enigmakeys',
            'title'  => 'enigmakeys',
            'domain' => 'enigma',
        ];
/*
        $args['actions'][] = [
            'action' => 'plugin.enigmacerts',
            'class'  => 'enigma certs',
            'label'  => 'enigmacerts',
            'title'  => 'enigmacerts',
            'domain' => 'enigma',
        ];
*/
        return $args;
    }

/**
     * Handler for preferences_sections_list hook.
     * Adds Encryption settings section into preferences sections list.
     *
     * @param array $p Original parameters
     *
     * @return array Modified parameters
     */
    function preferences_sections_list($p)
    {
        $p['list']['enigma'] = [
            'id' => 'enigma', 'section' => $this->gettext('encryption'),
        ];

return $p;
    }

/**
     * Handler for preferences_list hook.
     * Adds options blocks into Enigma settings sections in Preferences.
     *
     * @param array $p Original parameters
     *
     * @return array Modified parameters
     */
    function preferences_list($p)
    {
        if ($p['section'] != 'encryption') {
            return $p;
        }

$no_override = array_flip((array)$this->rc->config->get('dont_override'));

if (!isset($no_override['enigma_encryption'])) {
            if (!$p['current']) {
                $p['blocks']['main']['content'] = true;
                return $p;
            }

$field_id = 'rcmfd_enigma_encryption';
            $input    = new html_checkbox([
                    'name'  => '_enigma_encryption',
                    'id'    => $field_id,
                    'value' => 1,
            ]);

$p['blocks']['main']['options']['enigma_encryption'] = [
                'title'   => html::label($field_id, $this->gettext('supportencryption')),
                'content' => $input->show(intval($this->rc->config->get('enigma_encryption'))),
            ];
        }

if (!isset($no_override['enigma_signatures'])) {
            if (!$p['current']) {
                $p['blocks']['main']['content'] = true;
                return $p;
            }

$field_id = 'rcmfd_enigma_signatures';
            $input    = new html_checkbox([
                    'name'  => '_enigma_signatures',
                    'id'    => $field_id,
                    'value' => 1,
            ]);

$p['blocks']['main']['options']['enigma_signatures'] = [
                'title'   => html::label($field_id, $this->gettext('supportsignatures')),
                'content' => $input->show(intval($this->rc->config->get('enigma_signatures'))),
            ];
        }

if (!isset($no_override['enigma_decryption'])) {
            if (!$p['current']) {
                $p['blocks']['main']['content'] = true;
                return $p;
            }

$field_id = 'rcmfd_enigma_decryption';
            $input    = new html_checkbox([
                    'name'  => '_enigma_decryption',
                    'id'    => $field_id,
                    'value' => 1,
            ]);

$p['blocks']['main']['options']['enigma_decryption'] = [
                'title'   => html::label($field_id, $this->gettext('supportdecryption')),
                'content' => $input->show(intval($this->rc->config->get('enigma_decryption'))),
            ];
        }

if (!isset($no_override['enigma_sign_all'])) {
            if (!$p['current']) {
                $p['blocks']['main']['content'] = true;
                return $p;
            }

$field_id = 'rcmfd_enigma_sign_all';
            $input    = new html_checkbox([
                    'name'  => '_enigma_sign_all',
                    'id'    => $field_id,
                    'value' => 1,
            ]);

$p['blocks']['main']['options']['enigma_sign_all'] = [
                'title'   => html::label($field_id, $this->gettext('signdefault')),
                'content' => $input->show($this->rc->config->get('enigma_sign_all') ? 1 : 0),
            ];
        }

if (!isset($no_override['enigma_encrypt_all'])) {
            if (!$p['current']) {
                $p['blocks']['main']['content'] = true;
                return $p;
            }

$field_id = 'rcmfd_enigma_encrypt_all';
            $input    = new html_checkbox([
                    'name'  => '_enigma_encrypt_all',
                    'id'    => $field_id,
                    'value' => 1,
            ]);

$p['blocks']['main']['options']['enigma_encrypt_all'] = [
                'title'   => html::label($field_id, $this->gettext('encryptdefault')),
                'content' => $input->show($this->rc->config->get('enigma_encrypt_all') ? 1 : 0),
            ];
        }

if (!isset($no_override['enigma_attach_pubkey'])) {
            if (!$p['current']) {
                $p['blocks']['main']['content'] = true;
                return $p;
            }

$field_id = 'rcmfd_enigma_attach_pubkey';
            $input    = new html_checkbox([
                    'name'  => '_enigma_attach_pubkey',
                    'id'    => $field_id,
                    'value' => 1,
            ]);

$p['blocks']['main']['options']['enigma_attach_pubkey'] = [
                'title'   => html::label($field_id, $this->gettext('attachpubkeydefault')),
                'content' => $input->show($this->rc->config->get('enigma_attach_pubkey') ? 1 : 0),
            ];
        }

if (!isset($no_override['enigma_password_time'])) {
            if (!$p['current']) {
                $p['blocks']['main']['content'] = true;
                return $p;
            }

$field_id = 'rcmfd_enigma_password_time';
            $select   = new html_select(['name' => '_enigma_password_time', 'id' => $field_id, 'class' => 'custom-select']);

foreach ([1, 5, 10, 15, 30] as $m) {
                $label = $this->gettext(['name' => 'nminutes', 'vars' => ['m' => $m]]);
                $select->add($label, $m);
            }
            $select->add($this->gettext('wholesession'), 0);

$p['blocks']['main']['options']['enigma_password_time'] = [
                'title'   => html::label($field_id, $this->gettext('passwordtime')),
                'content' => $select->show(intval($this->rc->config->get('enigma_password_time'))),
            ];
        }

return $p;
    }

/**
     * Handler for preferences_save hook.
     * Executed on Enigma settings form submit.
     *
     * @param array $p Original parameters
     *
     * @return array Modified parameters
     */
    function preferences_save($p)
    {
        if ($p['section'] == 'encryption') {
            $p['prefs']['enigma_signatures'] = (bool) rcube_utils::get_input_value('_enigma_signatures', rcube_utils::INPUT_POST);
            $p['prefs']['enigma_decryption'] = (bool) rcube_utils::get_input_value('_enigma_decryption', rcube_utils::INPUT_POST);
            $p['prefs']['enigma_encryption'] = (bool) rcube_utils::get_input_value('_enigma_encryption', rcube_utils::INPUT_POST);
            $p['prefs']['enigma_sign_all'] = (bool) rcube_utils::get_input_value('_enigma_sign_all', rcube_utils::INPUT_POST);
            $p['prefs']['enigma_encrypt_all'] = (bool) rcube_utils::get_input_value('_enigma_encrypt_all', rcube_utils::INPUT_POST);
            $p['prefs']['enigma_attach_pubkey'] = (bool) rcube_utils::get_input_value('_enigma_attach_pubkey', rcube_utils::INPUT_POST);
            $p['prefs']['enigma_password_time'] = intval(rcube_utils::get_input_value('_enigma_password_time', rcube_utils::INPUT_POST));
        }

return $p;
    }

/**
     * Handler for keys/certs management UI template.
     */
    function preferences_ui()
    {
        $this->load_ui();

$this->ui->init();
    }

/**
     * Handler for 'identity_form' plugin hook.
     *
     * This will list private keys matching this identity
     * and add a link to enigma key management action.
     *
     * @param array $p Original parameters
     *
     * @return array Modified parameters
     */
    function identity_form($p)
    {
        if (isset($p['form']['encryption']) && !empty($p['record']['identity_id'])) {
            $content = '';

// find private keys for this identity
            if (!empty($p['record']['email'])) {
                $listing = [];
                $engine  = $this->load_engine();
                $keys    = $engine->list_keys($p['record']['email']);

// On error do nothing, plugin/gnupg misconfigured?
                if ($keys instanceof enigma_error) {
                    return $p;
                }

foreach ($keys as $key) {
                    if ($key->get_type() === enigma_key::TYPE_KEYPAIR) {
                        $listing[] = html::tag('li', null,
                            html::tag('strong', 'uid', html::quote($key->id))
                            . ' ' . html::tag('span', 'identity', html::quote($key->name))
                        );
                    }
                }

if (count($listing)) {
                    $content .= html::p(null, $this->gettext(['name' => 'identitymatchingprivkeys', 'vars' => ['nr' => count($listing)]]));
                    $content .= html::tag('ul', 'keylist', implode("\n", $listing));
                }
                else {
                    $content .= html::p(null, $this->gettext('identitynoprivkeys'));
                }
            }

// add button linking to enigma key management
            $button_attr = [
                'class'  => 'button',
                'href'   => $this->rc->url(['action' => 'plugin.enigmakeys']),
                'target' => '_parent',
            ];
            $content .= html::p(null, html::a($button_attr, $this->gettext('managekeys')));

// rename class to avoid Mailvelope key management to kick in
            $p['form']['encryption']['attrs'] = ['class' => 'enigma-identity-encryption'];
            // fill fieldset content with our stuff
            $p['form']['encryption']['content'] = html::div('identity-encryption-block', $content);
        }

return $p;
    }

/**
     * Handler for message_body_prefix hook.
     * Called for every displayed (content) part of the message.
     * Adds infobox about signature verification and/or decryption
     * status above the body.
     *
     * @param array $p Original parameters
     *
     * @return array Modified parameters
     */
    function status_message($p)
    {
        $this->load_ui();

return $this->ui->status_message($p);
    }

/**
     * Handler for message_load hook.
     * Check message bodies and attachments for keys/certs.
     */
    function message_load($p)
    {
        $this->load_ui();

return $this->ui->message_load($p);
    }

/**
     * Handler for template_object_messagebody hook.
     * This callback function adds a box below the message content
     * if there is a key/cert attachment available
     */
    function message_output($p)
    {
        $this->load_ui();

return $this->ui->message_output($p);
    }

/**
     * Handler for attached keys/certs import
     */
    function import_file()
    {
        $this->load_ui();

$this->ui->import_file();
    }

/**
     * Handle password submissions
     */
    function password_handler()
    {
        $this->load_engine();

$this->engine->password_handler();
    }

/**
     * Handle message_ready hook (encryption/signing)
     */
    function message_ready($p)
    {
        $this->load_ui();

return $this->ui->message_ready($p);
    }

/**
     * Handle message_compose_body hook
     */
    function message_compose($p)
    {
        $this->load_ui();

return $this->ui->message_compose($p);
    }

/**
     * Handler for refresh hook.
     */
    function refresh($p)
    {
        // calling enigma_engine constructor to remove passwords
        // stored in session after expiration time
        $this->load_engine();

return $p;
    }

/**
     * Handle delete_user_commit hook
     */
    function user_delete($p)
    {
        $this->load_engine();

$p['abort'] = $p['abort'] || !$this->engine->delete_user_data($p['username']);

return $p;
    }
}

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