- Fix attachment filenames broken with TNEF decoder using long filenames (#1486795)

- Use tnef_decoder class from Horde

1 files changed, 330 insertions, 0 deletions

diff --git a/program/lib/tnef_decoder.php b/program/lib/tnef_decoder.php
new file mode 100644
index 000000000..28d368989
--- /dev/null
+++ b/program/lib/tnef_decoder.php
@@ -0,0 +1,330 @@
+<?php
+/**
+ * The Horde's class allows MS-TNEF data to be displayed.
+ *
+ * The TNEF rendering is based on code by:
+ *   Graham Norbury <gnorbury@bondcar.com>
+ * Original design by:
+ *   Thomas Boll <tb@boll.ch>, Mark Simpson <damned@world.std.com>
+ *
+ * Copyright 2002-2010 The Horde Project (http://www.horde.org/)
+ *
+ * See the enclosed file COPYING for license information (LGPL). If you
+ * did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
+ *
+ * @author  Jan Schneider <jan@horde.org>
+ * @author  Michael Slusarz <slusarz@horde.org>
+ * @package Horde_Compress
+ */
+class tnef_decoder
+{
+    const SIGNATURE = 0x223e9f78;
+    const LVL_MESSAGE = 0x01;
+    const LVL_ATTACHMENT = 0x02;
+
+    const ASUBJECT = 0x88004;
+    const AMCLASS = 0x78008;
+    const ATTACHDATA = 0x6800f;
+    const AFILENAME = 0x18010;
+    const ARENDDATA = 0x69002;
+    const AMAPIATTRS = 0x69005;
+    const AVERSION = 0x89006;
+
+    const MAPI_NULL = 0x0001;
+    const MAPI_SHORT = 0x0002;
+    const MAPI_INT = 0x0003;
+    const MAPI_FLOAT = 0x0004;
+    const MAPI_DOUBLE = 0x0005;
+    const MAPI_CURRENCY = 0x0006;
+    const MAPI_APPTIME = 0x0007;
+    const MAPI_ERROR = 0x000a;
+    const MAPI_BOOLEAN = 0x000b;
+    const MAPI_OBJECT = 0x000d;
+    const MAPI_INT8BYTE = 0x0014;
+    const MAPI_STRING = 0x001e;
+    const MAPI_UNICODE_STRING = 0x001f;
+    const MAPI_SYSTIME = 0x0040;
+    const MAPI_CLSID = 0x0048;
+    const MAPI_BINARY = 0x0102;
+
+    const MAPI_ATTACH_LONG_FILENAME = 0x3707;
+    const MAPI_ATTACH_MIME_TAG = 0x370E;
+
+    const MAPI_NAMED_TYPE_ID = 0x0000;
+    const MAPI_NAMED_TYPE_STRING = 0x0001;
+    const MAPI_MV_FLAG = 0x1000;
+
+    /**
+     * Decompress the data.
+     *
+     * @param string $data   The data to decompress.
+     * @param array $params  An array of arguments needed to decompress the
+     *                       data.
+     *
+     * @return mixed  The decompressed data.
+     */
+    public function decompress($data, $params = array())
+    {
+        $out = array();
+
+        if ($this->_geti($data, 32) == self::SIGNATURE) {
+            $this->_geti($data, 16);
+
+            while (strlen($data) > 0) {
+                switch ($this->_geti($data, 8)) {
+                case self::LVL_MESSAGE:
+                    $this->_decodeMessage($data);
+                    break;
+
+                case self::LVL_ATTACHMENT:
+                    $this->_decodeAttachment($data, $out);
+                    break;
+                }
+            }
+        }
+
+        return array_reverse($out);
+    }
+
+    /**
+     * TODO
+     *
+     * @param string &$data  The data string.
+     * @param integer $bits  How many bits to retrieve.
+     *
+     * @return TODO
+     */
+    protected function _getx(&$data, $bits)
+    {
+        $value = null;
+
+        if (strlen($data) >= $bits) {
+            $value = substr($data, 0, $bits);
+            $data = substr_replace($data, '', 0, $bits);
+        }
+
+        return $value;
+    }
+
+    /**
+     * TODO
+     *
+     * @param string &$data  The data string.
+     * @param integer $bits  How many bits to retrieve.
+     *
+     * @return TODO
+     */
+    protected function _geti(&$data, $bits)
+    {
+        $bytes = $bits / 8;
+        $value = null;
+
+        if (strlen($data) >= $bytes) {
+            $value = ord($data[0]);
+            if ($bytes >= 2) {
+                $value += (ord($data[1]) << 8);
+            }
+            if ($bytes >= 4) {
+                $value += (ord($data[2]) << 16) + (ord($data[3]) << 24);
+            }
+            $data = substr_replace($data, '', 0, $bytes);
+        }
+
+        return $value;
+    }
+
+    /**
+     * TODO
+     *
+     * @param string &$data      The data string.
+     * @param string $attribute  TODO
+     */
+    protected function _decodeAttribute(&$data, $attribute)
+    {
+        /* Data. */
+        $this->_getx($data, $this->_geti($data, 32));
+
+        /* Checksum. */
+        $this->_geti($data, 16);
+    }
+
+    /**
+     * TODO
+     *
+     * @param string $data             The data string.
+     * @param array &$attachment_data  TODO
+     */
+    protected function _extractMapiAttributes($data, &$attachment_data)
+    {
+        /* Number of attributes. */
+        $number = $this->_geti($data, 32);
+
+        while ((strlen($data) > 0) && $number--) {
+            $have_mval = false;
+            $num_mval = 1;
+            $named_id = $value = null;
+            $attr_type = $this->_geti($data, 16);
+            $attr_name = $this->_geti($data, 16);
+
+            if (($attr_type & self::MAPI_MV_FLAG) != 0) {
+                $have_mval = true;
+                $attr_type = $attr_type & ~self::MAPI_MV_FLAG;
+            }
+
+            if (($attr_name >= 0x8000) && ($attr_name < 0xFFFE)) {
+                $this->_getx($data, 16);
+                $named_type = $this->_geti($data, 32);
+
+                switch ($named_type) {
+                case self::MAPI_NAMED_TYPE_ID:
+                    $named_id = $this->_geti($data, 32);
+                    $attr_name = $named_id;
+                    break;
+
+                case self::MAPI_NAMED_TYPE_STRING:
+                    $attr_name = 0x9999;
+                    $idlen = $this->_geti($data, 32);
+                    $datalen = $idlen + ((4 - ($idlen % 4)) % 4);
+                    $named_id = substr($this->_getx($data, $datalen), 0, $idlen);
+                    break;
+                }
+            }
+
+            if ($have_mval) {
+                $num_mval = $this->_geti($data, 32);
+            }
+
+            switch ($attr_type) {
+            case self::MAPI_SHORT:
+                $value = $this->_geti($data, 16);
+                break;
+
+            case self::MAPI_INT:
+            case self::MAPI_BOOLEAN:
+                for ($i = 0; $i < $num_mval; $i++) {
+                    $value = $this->_geti($data, 32);
+                }
+                break;
+
+            case self::MAPI_FLOAT:
+            case self::MAPI_ERROR:
+                $value = $this->_getx($data, 4);
+                break;
+
+            case self::MAPI_DOUBLE:
+            case self::MAPI_APPTIME:
+            case self::MAPI_CURRENCY:
+            case self::MAPI_INT8BYTE:
+            case self::MAPI_SYSTIME:
+                $value = $this->_getx($data, 8);
+                break;
+
+            case self::MAPI_STRING:
+            case self::MAPI_UNICODE_STRING:
+            case self::MAPI_BINARY:
+            case self::MAPI_OBJECT:
+                $num_vals = ($have_mval) ? $num_mval : $this->_geti($data, 32);
+                for ($i = 0; $i < $num_vals; $i++) {
+                    $length = $this->_geti($data, 32);
+
+                    /* Pad to next 4 byte boundary. */
+                    $datalen = $length + ((4 - ($length % 4)) % 4);
+
+                    if ($attr_type == self::MAPI_STRING) {
+                        --$length;
+                    }
+
+                    /* Read and truncate to length. */
+                    $value = substr($this->_getx($data, $datalen), 0, $length);
+                }
+                break;
+            }
+
+            /* Store any interesting attributes. */
+            switch ($attr_name) {
+            case self::MAPI_ATTACH_LONG_FILENAME:
+                /* Used in preference to AFILENAME value. */
+                $attachment_data[0]['name'] = preg_replace('/.*[\/](.*)$/', '\1', $value);
+                $attachment_data[0]['name'] = str_replace("\0", '', $attachment_data[0]['name']);
+                break;
+
+            case self::MAPI_ATTACH_MIME_TAG:
+                /* Is this ever set, and what is format? */
+                $attachment_data[0]['type'] = preg_replace('/^(.*)\/.*/', '\1', $value);
+                $attachment_data[0]['subtype'] = preg_replace('/.*\/(.*)$/', '\1', $value);
+                $attachment_data[0]['subtype'] = str_replace("\0", '', $attachment_data[0]['subtype']);
+                break;
+            }
+        }
+    }
+
+    /**
+     * TODO
+     *
+     * @param string &$data  The data string.
+     */
+    protected function _decodeMessage(&$data)
+    {
+        $this->_decodeAttribute($data, $this->_geti($data, 32));
+    }
+
+    /**
+     * TODO
+     *
+     * @param string &$data            The data string.
+     * @param array &$attachment_data  TODO
+     */
+    protected function _decodeAttachment(&$data, &$attachment_data)
+    {
+        $attribute = $this->_geti($data, 32);
+
+        switch ($attribute) {
+        case self::ARENDDATA:
+            /* Marks start of new attachment. */
+            $this->_getx($data, $this->_geti($data, 32));
+
+            /* Checksum */
+            $this->_geti($data, 16);
+
+            /* Add a new default data block to hold details of this
+               attachment. Reverse order is easier to handle later! */
+            array_unshift($attachment_data, array('type'    => 'application',
+                                                  'subtype' => 'octet-stream',
+                                                  'name'    => 'unknown',
+                                                  'stream'  => ''));
+            break;
+
+        case self::AFILENAME:
+            /* Strip path. */
+            $attachment_data[0]['name'] = preg_replace('/.*[\/](.*)$/', '\1', $this->_getx($data, $this->_geti($data, 32)));
+            $attachment_data[0]['name'] = str_replace("\0", '', $attachment_data[0]['name']);
+
+            /* Checksum */
+            $this->_geti($data, 16);
+            break;
+
+        case self::ATTACHDATA:
+            /* The attachment itself. */
+            $length = $this->_geti($data, 32);
+            $attachment_data[0]['size'] = $length;
+            $attachment_data[0]['stream'] = $this->_getx($data, $length);
+
+            /* Checksum */
+            $this->_geti($data, 16);
+            break;
+
+        case self::AMAPIATTRS:
+            $length = $this->_geti($data, 32);
+            $value = $this->_getx($data, $length);
+
+            /* Checksum */
+            $this->_geti($data, 16);
+            $this->_extractMapiAttributes($value, $attachment_data);
+            break;
+
+        default:
+            $this->_decodeAttribute($data, $attribute);
+        }
+    }
+
+}