mirror of
https://github.com/roundcube/roundcubemail.git
synced 2026-02-26 20:41:19 +01:00
760 lines
28 KiB
PHP
760 lines
28 KiB
PHP
<?php
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use RtfHtmlPhp\Document;
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use RtfHtmlPhp\Html\HtmlFormatter;
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/*
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+-----------------------------------------------------------------------+
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| This file is part of the Roundcube Webmail client |
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| |
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| Copyright (C) The Roundcube Dev Team |
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| Copyright (C) 2002-2010, The Horde Project (https://www.horde.org/) |
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| |
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| Licensed under the GNU General Public License version 3 or |
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| any later version with exceptions for skins & plugins. |
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| See the README file for a full license statement. |
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| |
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| PURPOSE: |
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| MS-TNEF format decoder |
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+-----------------------------------------------------------------------+
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| Author: Jan Schneider <jan@horde.org> |
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| Author: Michael Slusarz <slusarz@horde.org> |
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| Author: Aleksander Machniak <alec@alec.pl> |
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+-----------------------------------------------------------------------+
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*/
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/**
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* MS-TNEF format decoder based on code by:
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* Graham Norbury <gnorbury@bondcar.com>
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* Original design by:
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* Thomas Boll <tb@boll.ch>, Mark Simpson <damned@world.std.com>
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*/
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class rcube_tnef_decoder
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{
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public const SIGNATURE = 0x223E9F78;
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public const LVL_MESSAGE = 0x01;
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public const LVL_ATTACHMENT = 0x02;
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public const AFROM = 0x08000;
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public const ASUBJECT = 0x18004;
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public const AMESSAGEID = 0x18009;
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public const AFILENAME = 0x18010;
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public const APARENTID = 0x1800A;
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public const ACONVERSATIONID = 0x1800B;
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public const ABODY = 0x2800C;
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public const ADATESENT = 0x38005;
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public const ADATERECEIVED = 0x38006;
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public const ADATEMODIFIED = 0x38020;
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public const APRIORITY = 0x4800D;
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public const AOWNER = 0x60000;
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public const ASENTFOR = 0x60001;
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public const ASTATUS = 0x68007;
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public const ATTACHDATA = 0x6800F;
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public const ATTACHMETAFILE = 0x68011;
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public const ATTACHCREATEDATE = 0x38012;
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public const ARENDDATA = 0x69002;
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public const AMAPIPROPS = 0x69003;
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public const ARECIPIENTTABLE = 0x69004;
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public const AMAPIATTRS = 0x69005;
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public const AOEMCODEPAGE = 0x69007;
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public const AORIGINALMCLASS = 0x70006;
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public const AMCLASS = 0x78008;
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public const AVERSION = 0x89006;
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public const MAPI_TYPE_UNSET = 0x0000;
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public const MAPI_NULL = 0x0001;
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public const MAPI_SHORT = 0x0002;
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public const MAPI_INT = 0x0003;
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public const MAPI_FLOAT = 0x0004;
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public const MAPI_DOUBLE = 0x0005;
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public const MAPI_CURRENCY = 0x0006;
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public const MAPI_APPTIME = 0x0007;
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public const MAPI_ERROR = 0x000A;
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public const MAPI_BOOLEAN = 0x000B;
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public const MAPI_OBJECT = 0x000D;
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public const MAPI_INT8BYTE = 0x0014;
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public const MAPI_STRING = 0x001E;
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public const MAPI_UNICODE_STRING = 0x001F;
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public const MAPI_SYSTIME = 0x0040;
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public const MAPI_CLSID = 0x0048;
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public const MAPI_BINARY = 0x0102;
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public const MAPI_BODY = 0x1000;
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public const MAPI_RTF_COMPRESSED = 0x1009;
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public const MAPI_BODY_HTML = 0x1013;
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public const MAPI_NATIVE_BODY = 0x1016;
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public const MAPI_DISPLAY_NAME = 0x3001;
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public const MAPI_ADDRTYPE = 0x3002;
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public const MAPI_EMAIL_ADDRESS = 0x3003;
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public const MAPI_COMMENT = 0x3004;
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public const MAPI_DEPTH = 0x3005;
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public const MAPI_PROVIDER_DISPLAY = 0x3006;
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public const MAPI_CREATION_TIME = 0x3007;
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public const MAPI_LAST_MODIFICATION_TIME = 0x3008;
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public const MAPI_RESOURCE_FLAGS = 0x3009;
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public const MAPI_PROVIDER_DLL_NAME = 0x300A;
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public const MAPI_SEARCH_KEY = 0x300B;
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public const MAPI_ATTACHMENT_X400_PARAMETERS = 0x3700;
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public const MAPI_ATTACH_DATA = 0x3701;
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public const MAPI_ATTACH_ENCODING = 0x3702;
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public const MAPI_ATTACH_EXTENSION = 0x3703;
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public const MAPI_ATTACH_FILENAME = 0x3704;
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public const MAPI_ATTACH_METHOD = 0x3705;
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public const MAPI_ATTACH_LONG_FILENAME = 0x3707;
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public const MAPI_ATTACH_PATHNAME = 0x3708;
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public const MAPI_ATTACH_RENDERING = 0x3709;
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public const MAPI_ATTACH_TAG = 0x370A;
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public const MAPI_RENDERING_POSITION = 0x370B;
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public const MAPI_ATTACH_TRANSPORT_NAME = 0x370C;
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public const MAPI_ATTACH_LONG_PATHNAME = 0x370D;
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public const MAPI_ATTACH_MIME_TAG = 0x370E;
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public const MAPI_ATTACH_ADDITIONAL_INFO = 0x370F;
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public const MAPI_ATTACH_MIME_SEQUENCE = 0x3710;
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public const MAPI_ATTACH_CONTENT_ID = 0x3712;
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public const MAPI_ATTACH_CONTENT_LOCATION = 0x3713;
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public const MAPI_ATTACH_FLAGS = 0x3714;
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public const MAPI_NAMED_TYPE_ID = 0x0000;
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public const MAPI_NAMED_TYPE_STRING = 0x0001;
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public const MAPI_NAMED_TYPE_NONE = 0xFF;
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public const MAPI_MV_FLAG = 0x1000;
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public const RTF_UNCOMPRESSED = 0x414C454D;
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public const RTF_COMPRESSED = 0x75465A4C;
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protected $codepage;
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/**
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* Decompress the data.
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*
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* @param string $data the data to decompress
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* @param bool $as_html Return message body as HTML
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*
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* @return array the decompressed data
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*/
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public function decompress($data, $as_html = false)
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{
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$attachments = [];
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$message = [];
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if ($this->_geti($data, 32) == self::SIGNATURE) {
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$this->_geti($data, 16);
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// Version
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$this->_geti($data, 8); // lvl_message
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$this->_geti($data, 32); // idTnefVersion
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$this->_getx($data, $this->_geti($data, 32));
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$this->_geti($data, 16); // checksum
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while (strlen($data) > 0) {
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switch ($this->_geti($data, 8)) {
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case self::LVL_MESSAGE:
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$this->_decodeMessage($data, $message);
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break;
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case self::LVL_ATTACHMENT:
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$this->_decodeAttachment($data, $attachments);
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break;
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}
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}
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}
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// Return the message body as HTML
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if ($as_html) {
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// HTML body
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if (!empty($message['size']) && $message['subtype'] == 'html') {
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$message = $message['stream'];
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}
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// RTF body (converted to HTML)
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// Note: RTF can contain encapsulated HTML content
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elseif (!empty($message['size']) && $message['subtype'] == 'rtf'
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&& function_exists('iconv')
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&& class_exists('RtfHtmlPhp\Document')
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) {
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try {
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$document = new Document($message['stream']);
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$formatter = new HtmlFormatter(RCUBE_CHARSET);
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$message = $formatter->format($document);
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} catch (Exception $e) {
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// ignore the body
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$message = null;
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rcube::raise_error('Failed to extract RTF/HTML content from TNEF attachment', true);
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}
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} else {
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$message = null;
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}
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}
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return [
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'message' => $message,
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'attachments' => array_reverse($attachments),
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];
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}
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/**
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* Pop specified number of bytes from the buffer.
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*
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* @param string &$data The data string
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* @param int $bytes how many bytes to retrieve
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*
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* @return string Extracted data
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*/
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protected function _getx(&$data, $bytes)
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{
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$value = null;
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if (strlen($data) >= $bytes) {
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$value = substr($data, 0, $bytes);
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$data = substr($data, $bytes);
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}
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return $value;
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}
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/**
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* Pop specified number of bits from the buffer
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*
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* @param string &$data The data string
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* @param int $bits how many bits to retrieve
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*
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* @return int|null
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*/
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protected function _geti(&$data, $bits)
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{
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$bytes = $bits / 8;
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$value = null;
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if (strlen($data) >= $bytes) {
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$value = ord($data[0]);
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if ($bytes >= 2) {
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$value += (ord($data[1]) << 8);
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}
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if ($bytes >= 4) {
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$value += (ord($data[2]) << 16) + (ord($data[3]) << 24);
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}
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$data = substr($data, $bytes);
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}
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return $value;
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}
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/**
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* Decode a single attribute
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*
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* @param string &$data The data string
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*
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* @return string Extracted data
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*/
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protected function _decodeAttribute(&$data)
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{
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// Data.
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$value = $this->_getx($data, $this->_geti($data, 32));
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// Checksum.
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$this->_geti($data, 16);
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return $value;
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}
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/**
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* TODO
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*
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* @param string $data the data string
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* @param array &$result TODO
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*/
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protected function _extractMapiAttributes($data, &$result)
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{
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// Number of attributes.
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$number = $this->_geti($data, 32);
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while ((strlen($data) > 0) && $number--) {
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$have_mval = false;
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$num_mval = 1;
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$value = null;
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$attr_type = $this->_geti($data, 16);
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$attr_name = $this->_geti($data, 16);
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if (($attr_type & self::MAPI_MV_FLAG) != 0) {
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$have_mval = true;
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$attr_type &= ~self::MAPI_MV_FLAG;
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}
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if (($attr_name >= 0x8000) && ($attr_name < 0xFFFE)) {
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$this->_getx($data, 16);
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$named_type = $this->_geti($data, 32);
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switch ($named_type) {
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case self::MAPI_NAMED_TYPE_ID:
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$attr_name = $this->_geti($data, 32);
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break;
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case self::MAPI_NAMED_TYPE_STRING:
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$attr_name = 0x9999;
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$idlen = $this->_geti($data, 32);
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$name = $this->_getx($data, $idlen + ((4 - ($idlen % 4)) % 4));
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// $name = $this->convertString(substr($name, 0, $idlen));
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break;
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case self::MAPI_NAMED_TYPE_NONE:
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default:
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continue 2;
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}
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}
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if ($have_mval) {
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$num_mval = $this->_geti($data, 32);
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}
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switch ($attr_type) {
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case self::MAPI_NULL:
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case self::MAPI_TYPE_UNSET:
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break;
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case self::MAPI_SHORT:
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$value = $this->_geti($data, 16);
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$this->_geti($data, 16);
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break;
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case self::MAPI_INT:
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case self::MAPI_BOOLEAN:
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for ($i = 0; $i < $num_mval; $i++) {
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$value = $this->_geti($data, 32);
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}
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break;
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case self::MAPI_FLOAT:
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case self::MAPI_ERROR:
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$value = $this->_getx($data, 4);
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break;
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case self::MAPI_DOUBLE:
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case self::MAPI_APPTIME:
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case self::MAPI_CURRENCY:
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case self::MAPI_INT8BYTE:
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case self::MAPI_SYSTIME:
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$value = $this->_getx($data, 8);
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break;
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case self::MAPI_STRING:
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case self::MAPI_UNICODE_STRING:
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case self::MAPI_BINARY:
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case self::MAPI_OBJECT:
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$num_vals = $have_mval ? $num_mval : $this->_geti($data, 32);
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for ($i = 0; $i < $num_vals; $i++) {
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$length = $this->_geti($data, 32);
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// Pad to next 4 byte boundary.
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$datalen = $length + ((4 - ($length % 4)) % 4);
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// Read and truncate to length.
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$value = $this->_getx($data, $datalen);
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}
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if ($attr_type == self::MAPI_UNICODE_STRING) {
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$value = $this->convertString($value);
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}
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break;
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}
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// Store any interesting attributes.
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switch ($attr_name) {
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case self::MAPI_RTF_COMPRESSED:
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$result['type'] = 'application';
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$result['subtype'] = 'rtf';
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$result['name'] = (!empty($result['name']) ? $result['name'] : 'Untitled') . '.rtf';
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$result['stream'] = $this->_decodeRTF($value);
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$result['size'] = strlen($result['stream']);
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break;
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case self::MAPI_BODY:
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case self::MAPI_BODY_HTML:
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$result['type'] = 'text';
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$result['subtype'] = $attr_name == self::MAPI_BODY ? 'plain' : 'html';
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$result['name'] = (!empty($result['name']) ? $result['name'] : 'Untitled')
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. ($attr_name == self::MAPI_BODY ? '.txt' : '.html');
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$result['stream'] = $value;
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$result['size'] = strlen($value);
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break;
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case self::MAPI_ATTACH_LONG_FILENAME:
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// Used in preference to AFILENAME value.
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$result['name'] = trim(preg_replace('/.*[\/](.*)$/', '\1', $value));
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break;
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case self::MAPI_ATTACH_MIME_TAG:
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// Is this ever set, and what is format?
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$value = explode('/', trim($value));
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$result['type'] = $value[0];
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$result['subtype'] = $value[1];
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break;
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case self::MAPI_ATTACH_CONTENT_ID:
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$result['content-id'] = $value;
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break;
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case self::MAPI_ATTACH_DATA:
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$this->_getx($value, 16);
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$att = new self();
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$res = $att->decompress($value);
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$result = array_merge($result, $res['message']);
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break;
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}
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}
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}
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/**
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* Decodes TNEF message attributes
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*
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* @param string &$data The data string
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* @param array &$message Message data
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*/
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protected function _decodeMessage(&$data, &$message)
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{
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$attribute = $this->_geti($data, 32);
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$value = $this->_decodeAttribute($data);
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switch ($attribute) {
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case self::AOEMCODEPAGE:
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// Find codepage of the message
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$value = unpack('V', $value);
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$this->codepage = $value[1];
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break;
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case self::AMCLASS:
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$value = trim(str_replace('Microsoft Mail v3.0 ', '', $value));
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// Normal message will be that with prefix 'IPM.Microsoft Mail.
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break;
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case self::ASUBJECT:
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$message['name'] = $value;
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break;
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case self::AMAPIPROPS:
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$this->_extractMapiAttributes($value, $message);
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break;
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}
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}
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/**
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* Decodes TNEF attachment attributes
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*
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* @param string &$data The data string
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* @param array &$attachment Attachments data
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*/
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protected function _decodeAttachment(&$data, &$attachment)
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{
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$attribute = $this->_geti($data, 32);
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$size = $this->_geti($data, 32);
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$value = $this->_getx($data, $size);
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$this->_geti($data, 16); // checksum
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switch ($attribute) {
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case self::ARENDDATA:
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// Add a new default data block to hold details of this
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// attachment. Reverse order is easier to handle later!
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array_unshift($attachment, [
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'type' => 'application',
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'subtype' => 'octet-stream',
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'name' => 'unknown',
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'stream' => '',
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]);
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break;
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case self::AFILENAME:
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$value = $this->convertString($value, true);
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// Strip path
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$attachment[0]['name'] = trim(preg_replace('/.*[\/](.*)$/', '\1', $value));
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break;
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case self::ATTACHDATA:
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// The attachment itself
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$attachment[0]['size'] = $size;
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$attachment[0]['stream'] = $value;
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break;
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case self::AMAPIATTRS:
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$this->_extractMapiAttributes($value, $attachment[0]);
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break;
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}
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}
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/**
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* Convert string value to system charset according to defined codepage
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*/
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protected function convertString($str, $use_codepage = false)
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{
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if ($use_codepage && $this->codepage
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&& ($charset = rcube_charset::$windows_codepages[$this->codepage])
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) {
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$str = rcube_charset::convert($str, $charset, RCUBE_CHARSET);
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} elseif (($pos = strpos($str, "\0")) !== false && $pos != strlen($str) - 1) {
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$str = rcube_charset::convert($str, 'UTF-16LE', RCUBE_CHARSET);
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}
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return trim($str);
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}
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/**
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* Decodes TNEF RTF
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*/
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protected function _decodeRTF($data)
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{
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$c_size = $this->_geti($data, 32);
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$size = $this->_geti($data, 32);
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$magic = $this->_geti($data, 32);
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$crc = $this->_geti($data, 32);
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if ($magic == self::RTF_COMPRESSED) {
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$data = $this->_decompressRTF($data, $size);
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}
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return $data;
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}
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/**
|
||
* Decompress compressed RTF. Logic taken from Horde.
|
||
*/
|
||
protected function _decompressRTF($data, $size)
|
||
{
|
||
$in = $out = $flags = $flag_count = 0;
|
||
$uncomp = '';
|
||
$preload = "{\\rtf1\\ansi\\mac\\deff0\\deftab720{\\fonttbl;}{\\f0\\fnil \\froman \\fswiss \\fmodern \\fscript \\fdecor MS Sans SerifSymbolArialTimes New RomanCourier{\\colortbl\\red0\\green0\\blue0\n\r\\par \\pard\\plain\\f0\\fs20\\b\\i\\u\\tab\\tx";
|
||
$length_preload = strlen($preload);
|
||
|
||
for ($cnt = 0; $cnt < $length_preload; $cnt++) {
|
||
$uncomp .= $preload[$cnt];
|
||
$out++;
|
||
}
|
||
|
||
while ($out < ($size + $length_preload)) {
|
||
if (($flag_count++ % 8) == 0) {
|
||
$flags = ord($data[$in++]);
|
||
} else {
|
||
$flags = $flags >> 1;
|
||
}
|
||
|
||
if (($flags & 1) != 0) {
|
||
$offset = ord($data[$in++]);
|
||
$length = ord($data[$in++]);
|
||
$offset = ($offset << 4) | ($length >> 4);
|
||
$length = ($length & 0xF) + 2;
|
||
$offset = ((int) ($out / 4096)) * 4096 + $offset;
|
||
|
||
if ($offset >= $out) {
|
||
$offset -= 4096;
|
||
}
|
||
|
||
$end = $offset + $length;
|
||
|
||
while ($offset < $end) {
|
||
$uncomp .= $uncomp[$offset++];
|
||
$out++;
|
||
}
|
||
} else {
|
||
$uncomp .= $data[$in++];
|
||
$out++;
|
||
}
|
||
}
|
||
|
||
return substr($uncomp, $length_preload);
|
||
}
|
||
|
||
/**
|
||
* Parse RTF data and return the best plaintext representation we can.
|
||
* Adapted from: http://webcheatsheet.com/php/reading_the_clean_text_from_rtf.php
|
||
*
|
||
* @param string $text the RTF (uncompressed) text
|
||
*
|
||
* @return string the plain text
|
||
*/
|
||
public static function rtf2text($text)
|
||
{
|
||
$document = '';
|
||
$stack = [];
|
||
$j = -1;
|
||
|
||
// Read the data character-by- character…
|
||
for ($i = 0, $len = strlen($text); $i < $len; $i++) {
|
||
$c = $text[$i];
|
||
switch ($c) {
|
||
case '\\':
|
||
// Key Word
|
||
$nextChar = $text[$i + 1];
|
||
// If it is another backslash or nonbreaking space or hyphen,
|
||
// then the character is plain text and add it to the output stream.
|
||
if ($nextChar == '\\' && self::_rtfIsPlain($stack[$j])) {
|
||
$document .= '\\';
|
||
} elseif ($nextChar == '~' && self::_rtfIsPlain($stack[$j])) {
|
||
$document .= ' ';
|
||
} elseif ($nextChar == '_' && self::_rtfIsPlain($stack[$j])) {
|
||
$document .= '-';
|
||
} elseif ($nextChar == '*') {
|
||
// Add to the stack.
|
||
$stack[$j]['*'] = true;
|
||
} elseif ($nextChar == "'") {
|
||
// If it is a single quote, read next two characters that
|
||
// are the hexadecimal notation of a character we should add
|
||
// to the output stream.
|
||
$hex = substr($text, $i + 2, 2);
|
||
|
||
if (self::_rtfIsPlain($stack[$j])) {
|
||
$document .= html_entity_decode('&#' . hexdec($hex) . ';');
|
||
}
|
||
|
||
// Shift the pointer.
|
||
$i += 2;
|
||
} elseif ($nextChar >= 'a' && $nextChar <= 'z' || $nextChar >= 'A' && $nextChar <= 'Z') {
|
||
// Since, we’ve found the alphabetic character, the next
|
||
// characters are control words and, possibly, some digit
|
||
// parameter.
|
||
$word = '';
|
||
$param = null;
|
||
|
||
// Start reading characters after the backslash.
|
||
for ($k = $i + 1, $m = 0; $k < strlen($text); $k++, $m++) {
|
||
$nextChar = $text[$k];
|
||
// If the current character is a letter and there were
|
||
// no digits before it, then we’re still reading the
|
||
// control word. If there were digits, we should stop
|
||
// since we reach the end of the control word.
|
||
if ($nextChar >= 'a' && $nextChar <= 'z'
|
||
|| $nextChar >= 'A' && $nextChar <= 'Z') {
|
||
if (!empty($param)) {
|
||
break;
|
||
}
|
||
$word .= $nextChar;
|
||
} elseif ($nextChar >= '0' && $nextChar <= '9') {
|
||
// If it is a digit, store the parameter.
|
||
$param .= $nextChar;
|
||
} elseif ($nextChar == '-') {
|
||
// Since minus sign may occur only before a digit
|
||
// parameter, check whether $param is empty.
|
||
// Otherwise, we reach the end of the control word.
|
||
if (!empty($param)) {
|
||
break;
|
||
}
|
||
$param .= $nextChar;
|
||
} else {
|
||
break;
|
||
}
|
||
}
|
||
|
||
// Shift the pointer on the number of read characters.
|
||
$i += $m - 1;
|
||
|
||
// Start analyzing.We are interested mostly in control words
|
||
$toText = '';
|
||
|
||
switch (strtolower($word)) {
|
||
// If the control word is "u", then its parameter is
|
||
// the decimal notation of the Unicode character that
|
||
// should be added to the output stream. We need to
|
||
// check whether the stack contains \ucN control word.
|
||
// If it does, we should remove the N characters from
|
||
// the output stream.
|
||
case 'u':
|
||
$toText .= html_entity_decode('&#x' . dechex($param) . ';');
|
||
$ucDelta = @$stack[$j]['uc'];
|
||
if ($ucDelta > 0) {
|
||
$i += $ucDelta;
|
||
}
|
||
|
||
break;
|
||
case 'par':
|
||
case 'page':
|
||
case 'column':
|
||
case 'line':
|
||
case 'lbr':
|
||
$toText .= "\n";
|
||
break;
|
||
case 'emspace':
|
||
case 'enspace':
|
||
case 'qmspace':
|
||
$toText .= ' ';
|
||
break;
|
||
case 'tab':
|
||
$toText .= "\t";
|
||
break;
|
||
case 'chdate':
|
||
$toText .= date('m.d.Y');
|
||
break;
|
||
case 'chdpl':
|
||
$toText .= date('l, j F Y');
|
||
break;
|
||
case 'chdpa':
|
||
$toText .= date('D, j M Y');
|
||
break;
|
||
case 'chtime':
|
||
$toText .= date('H:i:s');
|
||
break;
|
||
case 'emdash':
|
||
$toText .= html_entity_decode('—');
|
||
break;
|
||
case 'endash':
|
||
$toText .= html_entity_decode('–');
|
||
break;
|
||
case 'bullet':
|
||
$toText .= html_entity_decode('•');
|
||
break;
|
||
case 'lquote':
|
||
$toText .= html_entity_decode('‘');
|
||
break;
|
||
case 'rquote':
|
||
$toText .= html_entity_decode('’');
|
||
break;
|
||
case 'ldblquote':
|
||
$toText .= html_entity_decode('«');
|
||
break;
|
||
case 'rdblquote':
|
||
$toText .= html_entity_decode('»');
|
||
break;
|
||
default:
|
||
$stack[$j][strtolower($word)] = empty($param) ? true : $param;
|
||
break;
|
||
}
|
||
|
||
// Add data to the output stream if required.
|
||
if (self::_rtfIsPlain($stack[$j])) {
|
||
$document .= $toText;
|
||
}
|
||
}
|
||
|
||
$i++;
|
||
break;
|
||
case '{':
|
||
// New subgroup starts, add new stack element and write the data
|
||
// from previous stack element to it.
|
||
if (!empty($stack[$j])) {
|
||
$stack[] = $stack[$j++];
|
||
} else {
|
||
$j++;
|
||
}
|
||
|
||
break;
|
||
case '}':
|
||
array_pop($stack);
|
||
$j--;
|
||
break;
|
||
case '\0':
|
||
case '\r':
|
||
case '\f':
|
||
case '\n':
|
||
// Junk
|
||
break;
|
||
default:
|
||
// Add other data to the output stream if required.
|
||
if (!empty($stack[$j]) && self::_rtfIsPlain($stack[$j])) {
|
||
$document .= $c;
|
||
}
|
||
|
||
break;
|
||
}
|
||
}
|
||
|
||
return $document;
|
||
}
|
||
|
||
/**
|
||
* Checks if an RTF element is plain text
|
||
*/
|
||
protected static function _rtfIsPlain($s)
|
||
{
|
||
$notPlain = ['*', 'fonttbl', 'colortbl', 'datastore', 'themedata', 'stylesheet'];
|
||
|
||
for ($i = 0; $i < count($notPlain); $i++) {
|
||
if (!empty($s[$notPlain[$i]])) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
}
|