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| | | <?php |
| | | /* |
| | | * tnef_decoder.php |
| | | * Graham Norbury <gnorbury@bondcar.com> |
| | | * (c) 2002 (GNU GPL - see ../../COPYING) |
| | | * |
| | | * Functions for decoding TNEF attachments in native PHP |
| | | * |
| | | * Adapted from original designs by: |
| | | * Thomas Boll <tb@boll.ch> [tnef.c] |
| | | * Mark Simpson <damned@world.std.com> [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 (!$download) |
| | | { |
| | | printf("<b>Embedded message:</b><pre>%s</pre>",$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("<pre>"); |
| | | } |
| | | |
| | | do_tnef_decode($buf, $attachment_data); |
| | | |
| | | if ($debug) |
| | | { |
| | | echo("</pre>"); |
| | | } |
| | | return array_reverse($attachment_data); |
| | | |
| | | } |
| | | |
| | | ?> |