From 21b160f38c98bf41ebc843e7639b5b1af588b489 Mon Sep 17 00:00:00 2001 From: thomascube Date: Sun, 8 Feb 2009 20:38:54 +0000 Subject: Added TNEF support to decode MS Outlook (winmail.dat) attachments --- program/lib/tnef_decoder.inc | 352 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 352 insertions(+) create mode 100644 program/lib/tnef_decoder.inc (limited to 'program/lib/tnef_decoder.inc') diff --git a/program/lib/tnef_decoder.inc b/program/lib/tnef_decoder.inc new file mode 100644 index 000000000..f9b7c3684 --- /dev/null +++ b/program/lib/tnef_decoder.inc @@ -0,0 +1,352 @@ + + * (c) 2002 (GNU GPL - see ../../COPYING) + * + * Functions for decoding TNEF attachments in native PHP + * + * Adapted from original designs by: + * Thomas Boll [tnef.c] + * Mark Simpson [tnef-1.1.1] + * + */ + +define("TNEF_SIGNATURE", 0x223e9f78); +define("TNEF_LVL_MESSAGE", 0x01); +define("TNEF_LVL_ATTACHMENT", 0x02); + +define("TNEF_STRING", 0x00010000); +define("TNEF_TEXT", 0x00020000); +define("TNEF_BYTE", 0x00060000); +define("TNEF_WORD", 0x00070000); +define("TNEF_DWORD", 0x00080000); + +define("TNEF_ASUBJECT", TNEF_DWORD | 0x8004); +define("TNEF_AMCLASS", TNEF_WORD | 0x8008); +define("TNEF_BODYTEXT", TNEF_TEXT | 0x800c); +define("TNEF_ATTACHDATA", TNEF_BYTE | 0x800f); +define("TNEF_AFILENAME", TNEF_STRING | 0x8010); +define("TNEF_ARENDDATA", TNEF_BYTE | 0x9002); +define("TNEF_AMAPIATTRS", TNEF_BYTE | 0x9005); +define("TNEF_AVERSION", TNEF_DWORD | 0x9006); + +define("TNEF_MAPI_NULL", 0x0001); +define("TNEF_MAPI_SHORT", 0x0002); +define("TNEF_MAPI_INT", 0x0003); +define("TNEF_MAPI_FLOAT", 0x0004); +define("TNEF_MAPI_DOUBLE", 0x0005); +define("TNEF_MAPI_CURRENCY", 0x0006); +define("TNEF_MAPI_APPTIME", 0x0007); +define("TNEF_MAPI_ERROR", 0x000a); +define("TNEF_MAPI_BOOLEAN", 0x000b); +define("TNEF_MAPI_OBJECT", 0x000d); +define("TNEF_MAPI_INT8BYTE", 0x0014); +define("TNEF_MAPI_STRING", 0x001e); +define("TNEF_MAPI_UNICODE_STRING", 0x001f); +define("TNEF_MAPI_SYSTIME", 0x0040); +define("TNEF_MAPI_CLSID", 0x0048); +define("TNEF_MAPI_BINARY", 0x0102); + +define("TNEF_MAPI_ATTACH_MIME_TAG", 0x370E); +define("TNEF_MAPI_ATTACH_LONG_FILENAME", 0x3707); +define("TNEF_MAPI_ATTACH_DATA", 0x3701); + +function tnef_getx($size, &$buf) +{ + $value = null; + if (strlen($buf) >= $size) + { + $value = substr($buf, 0, $size); + $buf = substr_replace($buf, '', 0, $size); + } + return $value; +} + +function tnef_geti8(&$buf) +{ + $value = null; + if (strlen($buf) >= 1) + { + $value = ord($buf{0}); + $buf = substr_replace($buf, '', 0, 1); + } + return $value; +} + +function tnef_geti16(&$buf) +{ + $value = null; + if (strlen($buf) >= 2) + { + $value = ord($buf{0}) + + (ord($buf{1}) << 8); + $buf = substr_replace($buf, '', 0, 2); + } + return $value; +} + +function tnef_geti32(&$buf) +{ + $value = null; + if (strlen($buf) >= 4) + { + $value = ord($buf{0}) + + (ord($buf{1}) << 8) + + (ord($buf{2}) << 16) + + (ord($buf{3}) << 24); + $buf = substr_replace($buf, '', 0, 4); + } + return $value; +} + +function tnef_decode_attribute($attribute, &$buf) +{ + global $debug, $download; + + $length = tnef_geti32($buf); + $value = tnef_getx($length, $buf); //data + tnef_geti16($buf); //checksum + + if ($debug) + { + printf("ATTRIBUTE[%08x] %d bytes\n", $attribute, $length); + } + + switch($attribute) + { + case TNEF_BODYTEXT: + if (!$download) + { + printf("Embedded message:
%s
",$value); + } + break; + + default: + } +} + +function extract_mapi_attrs($buf, &$attachment_data) +{ + global $debug; + + tnef_geti32($buf); // number of attributes + while(strlen($buf) > 0) + { + $value = null; + $length = 0; + $attr_type = tnef_geti16($buf); + $attr_name = tnef_geti16($buf); + if ($debug) + { + printf("mapi attribute: %04x:%04x\n", $attr_type, $attr_name); + } + switch($attr_type) + { + case TNEF_MAPI_SHORT: + $value = tnef_geti16($buf); + break; + + case TNEF_MAPI_INT: + case TNEF_MAPI_BOOLEAN: + $value = tnef_geti32($buf); + break; + + case TNEF_MAPI_FLOAT: + $value = tnef_getx(4, $buf); + break; + + case TNEF_MAPI_DOUBLE: + case TNEF_MAPI_SYSTIME: + $value = tnef_getx(8, $buf); + break; + + case TNEF_MAPI_STRING: + case TNEF_MAPI_UNICODE_STRING: + case TNEF_MAPI_BINARY: + case TNEF_MAPI_OBJECT: + $num_vals = tnef_geti32($buf); + for ($i = 0; $i < $num_vals; $i++) // usually just 1 + { + $length = tnef_geti32($buf); + $buflen = $length + ((4 - ($length % 4)) % 4); // pad to next 4 byte boundary + $value = substr(tnef_getx($buflen, $buf), 0, $length); // read and truncate to length + } + break; + + default: + if ($debug) + { + echo("Unknown mapi attribute!\n"); + } + } + + // store any interesting attributes + switch($attr_name) + { + case TNEF_MAPI_ATTACH_LONG_FILENAME: // used in preference to AFILENAME value + $attachment_data[0]['name'] = ereg_replace('.*[\/](.*)$', '\1', $value); // strip path + break; + + case TNEF_MAPI_ATTACH_MIME_TAG: // Is this ever set, and what is format? + $attachment_data[0]['type0'] = ereg_replace('^(.*)/.*', '\1', $value); + $attachment_data[0]['type1'] = ereg_replace('.*/(.*)$', '\1', $value); + break; + + case TNEF_MAPI_ATTACH_DATA: + tnef_getx(16, $value); // skip the next 16 bytes (unknown data) + array_shift($attachment_data); // eliminate the current (bogus) attachment + do_tnef_decode($value, $attachment_data); // recursively process the attached message + break; + + default: + } + } +} + +function tnef_decode_message(&$buf) +{ + global $debug; + + if ($debug) + { + echo("MESSAGE "); + } + + $attribute = tnef_geti32($buf); + tnef_decode_attribute($attribute, $buf); +} + +function tnef_decode_attachment(&$buf, &$attachment_data) +{ + global $debug; + + if ($debug) + { + echo("ATTACHMENT "); + } + + $attribute = tnef_geti32($buf); + switch($attribute) + { + case TNEF_ARENDDATA: // marks start of new attachment + $length = tnef_geti32($buf); + tnef_getx($length, $buf); + tnef_geti16($buf); //checksum + if ($debug) + { + printf("ARENDDATA[%08x]: %d bytes\n", $attribute, $length); + } + // add a new default data block to hold details of this attachment + // reverse order is easier to handle later! + array_unshift($attachment_data, array('type0' => 'application', + 'type1' => 'octet-stream', + 'name' => 'unknown', + 'stream' => '')); + break; + + case TNEF_AFILENAME: // filename + $length = tnef_geti32($buf); + $attachment_data[0]['name'] = ereg_replace('.*[\/](.*)$', + '\1', + tnef_getx($length, $buf)); // strip path + tnef_geti16($buf); //checksum + if ($debug) + { + printf("AFILENAME[%08x]: %s\n", $attribute, $attachment_data[0]['name']); + } + break; + + case TNEF_ATTACHDATA: // the attachment itself + $length = tnef_geti32($buf); + $attachment_data[0]['size'] = $length; + $attachment_data[0]['stream'] = tnef_getx($length, $buf); + tnef_geti16($buf); //checksum + if ($debug) + { + printf("ATTACHDATA[%08x]: %d bytes\n", $attribute, $length); + } + break; + + case TNEF_AMAPIATTRS: + $length = tnef_geti32($buf); + $value = tnef_getx($length, $buf); + tnef_geti16($buf); //checksum + if ($debug) + { + printf("AMAPIATTRS[%08x]: %d bytes\n", $attribute, $length); + } + extract_mapi_attrs($value, $attachment_data); + break; + + default: + tnef_decode_attribute($attribute, $buf); + } +} + +function do_tnef_decode(&$buf, &$attachment_data) +{ + global $debug; + + $tnef_signature = tnef_geti32($buf); + if ($tnef_signature == TNEF_SIGNATURE) + { + $tnef_key = tnef_geti16($buf); + if ($debug) + { + printf("Signature: 0x%08x\nKey: 0x%04x\n", $tnef_signature, $tnef_key); + } + + while (strlen($buf) > 0) + { + $lvl_type = tnef_geti8($buf); + switch($lvl_type) + { + case TNEF_LVL_MESSAGE: + tnef_decode_message($buf); + break; + + case TNEF_LVL_ATTACHMENT: + tnef_decode_attachment($buf, $attachment_data); + break; + + default: + if ($debug) + { + echo("Invalid file format!"); + } + break 2; + } + } + } + else + { + if ($debug) + { + echo("Invalid file format!"); + } + } +} + +function tnef_decode($buf) +{ + global $debug; + + $attachment_data = array(); + + if ($debug) + { + echo("
");
+   }
+
+   do_tnef_decode($buf, $attachment_data);
+
+   if ($debug)
+   {
+      echo("
"); + } + return array_reverse($attachment_data); + +} + +?> \ No newline at end of file -- cgit v1.2.3