diff options
Diffstat (limited to 'plugins/enigma/lib/enigma_engine.php')
| -rw-r--r-- | plugins/enigma/lib/enigma_engine.php | 533 |
1 files changed, 0 insertions, 533 deletions
diff --git a/plugins/enigma/lib/enigma_engine.php b/plugins/enigma/lib/enigma_engine.php deleted file mode 100644 index 8a64c07ff..000000000 --- a/plugins/enigma/lib/enigma_engine.php +++ /dev/null @@ -1,533 +0,0 @@ -<?php -/* - +-------------------------------------------------------------------------+ - | Engine of the Enigma Plugin | - | | - | This program is free software; you can redistribute it and/or modify | - | it under the terms of the GNU General Public License version 2 | - | as published by the Free Software Foundation. | - | | - | 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, write to the Free Software Foundation, Inc., | - | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | - | | - +-------------------------------------------------------------------------+ - | Author: Aleksander Machniak <alec@alec.pl> | - +-------------------------------------------------------------------------+ - -*/ - -/* - RFC2440: OpenPGP Message Format - RFC3156: MIME Security with OpenPGP - RFC3851: S/MIME -*/ - -class enigma_engine -{ - private $rc; - private $enigma; - private $pgp_driver; - private $smime_driver; - - public $decryptions = array(); - public $signatures = array(); - public $signed_parts = array(); - - - /** - * Plugin initialization. - */ - function __construct($enigma) - { - $rcmail = rcmail::get_instance(); - $this->rc = $rcmail; - $this->enigma = $enigma; - } - - /** - * PGP driver initialization. - */ - function load_pgp_driver() - { - if ($this->pgp_driver) - return; - - $driver = 'enigma_driver_' . $this->rc->config->get('enigma_pgp_driver', 'gnupg'); - $username = $this->rc->user->get_username(); - - // Load driver - $this->pgp_driver = new $driver($username); - - if (!$this->pgp_driver) { - rcube::raise_error(array( - 'code' => 600, 'type' => 'php', - 'file' => __FILE__, 'line' => __LINE__, - 'message' => "Enigma plugin: Unable to load PGP driver: $driver" - ), true, true); - } - - // Initialise driver - $result = $this->pgp_driver->init(); - - if ($result instanceof enigma_error) { - rcube::raise_error(array( - 'code' => 600, 'type' => 'php', - 'file' => __FILE__, 'line' => __LINE__, - 'message' => "Enigma plugin: ".$result->getMessage() - ), true, true); - } - } - - /** - * S/MIME driver initialization. - */ - function load_smime_driver() - { - if ($this->smime_driver) - return; - - // NOT IMPLEMENTED! - return; - - $driver = 'enigma_driver_' . $this->rc->config->get('enigma_smime_driver', 'phpssl'); - $username = $this->rc->user->get_username(); - - // Load driver - $this->smime_driver = new $driver($username); - - if (!$this->smime_driver) { - rcube::raise_error(array( - 'code' => 600, 'type' => 'php', - 'file' => __FILE__, 'line' => __LINE__, - 'message' => "Enigma plugin: Unable to load S/MIME driver: $driver" - ), true, true); - } - - // Initialise driver - $result = $this->smime_driver->init(); - - if ($result instanceof enigma_error) { - rcube::raise_error(array( - 'code' => 600, 'type' => 'php', - 'file' => __FILE__, 'line' => __LINE__, - 'message' => "Enigma plugin: ".$result->getMessage() - ), true, true); - } - } - - /** - * Handler for plain/text message. - * - * @param array Reference to hook's parameters - */ - function parse_plain(&$p) - { - $part = $p['structure']; - - // Get message body from IMAP server - $this->set_part_body($part, $p['object']->uid); - - // @TODO: big message body can be a file resource - // PGP signed message - if (preg_match('/^-----BEGIN PGP SIGNED MESSAGE-----/', $part->body)) { - $this->parse_plain_signed($p); - } - // PGP encrypted message - else if (preg_match('/^-----BEGIN PGP MESSAGE-----/', $part->body)) { - $this->parse_plain_encrypted($p); - } - } - - /** - * Handler for multipart/signed message. - * - * @param array Reference to hook's parameters - */ - function parse_signed(&$p) - { - $struct = $p['structure']; - - // S/MIME - if ($struct->parts[1] && $struct->parts[1]->mimetype == 'application/pkcs7-signature') { - $this->parse_smime_signed($p); - } - // PGP/MIME: - // The multipart/signed body MUST consist of exactly two parts. - // The first part contains the signed data in MIME canonical format, - // including a set of appropriate content headers describing the data. - // The second body MUST contain the PGP digital signature. It MUST be - // labeled with a content type of "application/pgp-signature". - else if ($struct->parts[1] && $struct->parts[1]->mimetype == 'application/pgp-signature') { - $this->parse_pgp_signed($p); - } - } - - /** - * Handler for multipart/encrypted message. - * - * @param array Reference to hook's parameters - */ - function parse_encrypted(&$p) - { - $struct = $p['structure']; - - // S/MIME - if ($struct->mimetype == 'application/pkcs7-mime') { - $this->parse_smime_encrypted($p); - } - // PGP/MIME: - // The multipart/encrypted MUST consist of exactly two parts. The first - // MIME body part must have a content type of "application/pgp-encrypted". - // This body contains the control information. - // The second MIME body part MUST contain the actual encrypted data. It - // must be labeled with a content type of "application/octet-stream". - else if ($struct->parts[0] && $struct->parts[0]->mimetype == 'application/pgp-encrypted' && - $struct->parts[1] && $struct->parts[1]->mimetype == 'application/octet-stream' - ) { - $this->parse_pgp_encrypted($p); - } - } - - /** - * Handler for plain signed message. - * Excludes message and signature bodies and verifies signature. - * - * @param array Reference to hook's parameters - */ - private function parse_plain_signed(&$p) - { - $this->load_pgp_driver(); - $part = $p['structure']; - - // Verify signature - if ($this->rc->action == 'show' || $this->rc->action == 'preview') { - $sig = $this->pgp_verify($part->body); - } - - // @TODO: Handle big bodies using (temp) files - - // In this way we can use fgets on string as on file handle - $fh = fopen('php://memory', 'br+'); - // @TODO: fopen/fwrite errors handling - if ($fh) { - fwrite($fh, $part->body); - rewind($fh); - } - $part->body = null; - - // Extract body (and signature?) - while (!feof($fh)) { - $line = fgets($fh, 1024); - - if ($part->body === null) - $part->body = ''; - else if (preg_match('/^-----BEGIN PGP SIGNATURE-----/', $line)) - break; - else - $part->body .= $line; - } - - // Remove "Hash" Armor Headers - $part->body = preg_replace('/^.*\r*\n\r*\n/', '', $part->body); - // de-Dash-Escape (RFC2440) - $part->body = preg_replace('/(^|\n)- -/', '\\1-', $part->body); - - // Store signature data for display - if (!empty($sig)) { - $this->signed_parts[$part->mime_id] = $part->mime_id; - $this->signatures[$part->mime_id] = $sig; - } - - fclose($fh); - } - - /** - * Handler for PGP/MIME signed message. - * Verifies signature. - * - * @param array Reference to hook's parameters - */ - private function parse_pgp_signed(&$p) - { - $this->load_pgp_driver(); - $struct = $p['structure']; - - // Verify signature - if ($this->rc->action == 'show' || $this->rc->action == 'preview') { - $msg_part = $struct->parts[0]; - $sig_part = $struct->parts[1]; - - // Get bodies - $this->set_part_body($msg_part, $p['object']->uid); - $this->set_part_body($sig_part, $p['object']->uid); - - // Verify - $sig = $this->pgp_verify($msg_part->body, $sig_part->body); - - // Store signature data for display - $this->signatures[$struct->mime_id] = $sig; - - // Message can be multipart (assign signature to each subpart) - if (!empty($msg_part->parts)) { - foreach ($msg_part->parts as $part) - $this->signed_parts[$part->mime_id] = $struct->mime_id; - } - else - $this->signed_parts[$msg_part->mime_id] = $struct->mime_id; - - // Remove signature file from attachments list - unset($struct->parts[1]); - } - } - - /** - * Handler for S/MIME signed message. - * Verifies signature. - * - * @param array Reference to hook's parameters - */ - private function parse_smime_signed(&$p) - { - $this->load_smime_driver(); - } - - /** - * Handler for plain encrypted message. - * - * @param array Reference to hook's parameters - */ - private function parse_plain_encrypted(&$p) - { - $this->load_pgp_driver(); - $part = $p['structure']; - - // Get body - $this->set_part_body($part, $p['object']->uid); - - // Decrypt - $result = $this->pgp_decrypt($part->body); - - // Store decryption status - $this->decryptions[$part->mime_id] = $result; - - // Parse decrypted message - if ($result === true) { - // @TODO - } - } - - /** - * Handler for PGP/MIME encrypted message. - * - * @param array Reference to hook's parameters - */ - private function parse_pgp_encrypted(&$p) - { - $this->load_pgp_driver(); - $struct = $p['structure']; - $part = $struct->parts[1]; - - // Get body - $this->set_part_body($part, $p['object']->uid); - - // Decrypt - $result = $this->pgp_decrypt($part->body); - - $this->decryptions[$part->mime_id] = $result; -//print_r($part); - // Parse decrypted message - if ($result === true) { - // @TODO - } - else { - // Make sure decryption status message will be displayed - $part->type = 'content'; - $p['object']->parts[] = $part; - } - } - - /** - * Handler for S/MIME encrypted message. - * - * @param array Reference to hook's parameters - */ - private function parse_smime_encrypted(&$p) - { - $this->load_smime_driver(); - } - - /** - * PGP signature verification. - * - * @param mixed Message body - * @param mixed Signature body (for MIME messages) - * - * @return mixed enigma_signature or enigma_error - */ - private function pgp_verify(&$msg_body, $sig_body=null) - { - // @TODO: Handle big bodies using (temp) files - // @TODO: caching of verification result - $sig = $this->pgp_driver->verify($msg_body, $sig_body); - - if (($sig instanceof enigma_error) && $sig->getCode() != enigma_error::E_KEYNOTFOUND) - rcube::raise_error(array( - 'code' => 600, 'type' => 'php', - 'file' => __FILE__, 'line' => __LINE__, - 'message' => "Enigma plugin: " . $sig->getMessage() - ), true, false); - - return $sig; - } - - /** - * PGP message decryption. - * - * @param mixed Message body - * - * @return mixed True or enigma_error - */ - private function pgp_decrypt(&$msg_body) - { - // @TODO: Handle big bodies using (temp) files - // @TODO: caching of verification result - $key = ''; $pass = ''; // @TODO - $result = $this->pgp_driver->decrypt($msg_body, $key, $pass); - - if ($result instanceof enigma_error) { - $err_code = $result->getCode(); - if (!in_array($err_code, array(enigma_error::E_KEYNOTFOUND, enigma_error::E_BADPASS))) - rcube::raise_error(array( - 'code' => 600, 'type' => 'php', - 'file' => __FILE__, 'line' => __LINE__, - 'message' => "Enigma plugin: " . $result->getMessage() - ), true, false); - return $result; - } - -// $msg_body = $result; - return true; - } - - /** - * PGP keys listing. - * - * @param mixed Key ID/Name pattern - * - * @return mixed Array of keys or enigma_error - */ - function list_keys($pattern='') - { - $this->load_pgp_driver(); - $result = $this->pgp_driver->list_keys($pattern); - - if ($result instanceof enigma_error) { - rcube::raise_error(array( - 'code' => 600, 'type' => 'php', - 'file' => __FILE__, 'line' => __LINE__, - 'message' => "Enigma plugin: " . $result->getMessage() - ), true, false); - } - - return $result; - } - - /** - * PGP key details. - * - * @param mixed Key ID - * - * @return mixed enigma_key or enigma_error - */ - function get_key($keyid) - { - $this->load_pgp_driver(); - $result = $this->pgp_driver->get_key($keyid); - - if ($result instanceof enigma_error) { - rcube::raise_error(array( - 'code' => 600, 'type' => 'php', - 'file' => __FILE__, 'line' => __LINE__, - 'message' => "Enigma plugin: " . $result->getMessage() - ), true, false); - } - - return $result; - } - - /** - * PGP keys/certs importing. - * - * @param mixed Import file name or content - * @param boolean True if first argument is a filename - * - * @return mixed Import status data array or enigma_error - */ - function import_key($content, $isfile=false) - { - $this->load_pgp_driver(); - $result = $this->pgp_driver->import($content, $isfile); - - if ($result instanceof enigma_error) { - rcube::raise_error(array( - 'code' => 600, 'type' => 'php', - 'file' => __FILE__, 'line' => __LINE__, - 'message' => "Enigma plugin: " . $result->getMessage() - ), true, false); - } - else { - $result['imported'] = $result['public_imported'] + $result['private_imported']; - $result['unchanged'] = $result['public_unchanged'] + $result['private_unchanged']; - } - - return $result; - } - - /** - * Handler for keys/certs import request action - */ - function import_file() - { - $uid = rcube_utils::get_input_value('_uid', rcube_utils::INPUT_POST); - $mbox = rcube_utils::get_input_value('_mbox', rcube_utils::INPUT_POST); - $mime_id = rcube_utils::get_input_value('_part', rcube_utils::INPUT_POST); - $storage = $this->rc->get_storage(); - - if ($uid && $mime_id) { - $storage->set_folder($mbox); - $part = $storage->get_message_part($uid, $mime_id); - } - - if ($part && is_array($result = $this->import_key($part))) { - $this->rc->output->show_message('enigma.keysimportsuccess', 'confirmation', - array('new' => $result['imported'], 'old' => $result['unchanged'])); - } - else - $this->rc->output->show_message('enigma.keysimportfailed', 'error'); - - $this->rc->output->send(); - } - - /** - * Checks if specified message part contains body data. - * If body is not set it will be fetched from IMAP server. - * - * @param rcube_message_part Message part object - * @param integer Message UID - */ - private function set_part_body($part, $uid) - { - // @TODO: Create such function in core - // @TODO: Handle big bodies using file handles - if (!isset($part->body)) { - $part->body = $this->rc->storage->get_message_part( - $uid, $part->mime_id, $part); - } - } -} |