From 183851b06bd6c52f3cae5375f433da720d410447 Mon Sep 17 00:00:00 2001 From: Pierre Schmitz Date: Wed, 11 Oct 2006 18:12:39 +0000 Subject: MediaWiki 1.7.1 wiederhergestellt --- includes/MacBinary.php | 272 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 272 insertions(+) create mode 100644 includes/MacBinary.php (limited to 'includes/MacBinary.php') diff --git a/includes/MacBinary.php b/includes/MacBinary.php new file mode 100644 index 00000000..05c3ce5c --- /dev/null +++ b/includes/MacBinary.php @@ -0,0 +1,272 @@ + + * Portions based on Convert::BinHex by Eryq et al + * http://www.mediawiki.org/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * http://www.gnu.org/copyleft/gpl.html + * + * @package MediaWiki + * @subpackage SpecialPage + */ + +class MacBinary { + function MacBinary( $filename ) { + $this->open( $filename ); + $this->loadHeader(); + } + + /** + * The file must be seekable, such as local filesystem. + * Remote URLs probably won't work. + * + * @param string $filename + */ + function open( $filename ) { + $this->valid = false; + $this->version = 0; + $this->filename = ''; + $this->dataLength = 0; + $this->resourceLength = 0; + $this->handle = fopen( $filename, 'rb' ); + } + + /** + * Does this appear to be a valid MacBinary archive? + * @return bool + */ + function isValid() { + return $this->valid; + } + + /** + * Get length of data fork + * @return int + */ + function dataForkLength() { + return $this->dataLength; + } + + /** + * Copy the data fork to an external file or resource. + * @param resource $destination + * @return bool + */ + function extractData( $destination ) { + if( !$this->isValid() ) { + return false; + } + + // Data fork appears immediately after header + fseek( $this->handle, 128 ); + return $this->copyBytesTo( $destination, $this->dataLength ); + } + + /** + * + */ + function close() { + fclose( $this->handle ); + } + + // -------------------------------------------------------------- + + /** + * Check if the given file appears to be MacBinary-encoded, + * as Internet Explorer on Mac OS may provide for unknown types. + * http://www.lazerware.com/formats/macbinary/macbinary_iii.html + * If ok, load header data. + * + * @return bool + * @access private + */ + function loadHeader() { + $fname = 'MacBinary::loadHeader'; + + fseek( $this->handle, 0 ); + $head = fread( $this->handle, 128 ); + $this->hexdump( $head ); + + if( strlen( $head ) < 128 ) { + wfDebug( "$fname: couldn't read full MacBinary header\n" ); + return false; + } + + if( $head{0} != "\x00" || $head{74} != "\x00" ) { + wfDebug( "$fname: header bytes 0 and 74 not null\n" ); + return false; + } + + $signature = substr( $head, 102, 4 ); + $a = unpack( "ncrc", substr( $head, 124, 2 ) ); + $storedCRC = $a['crc']; + $calculatedCRC = $this->calcCRC( substr( $head, 0, 124 ) ); + if( $storedCRC == $calculatedCRC ) { + if( $signature == 'mBIN' ) { + $this->version = 3; + } else { + $this->version = 2; + } + } else { + $crc = sprintf( "%x != %x", $storedCRC, $calculatedCRC ); + if( $storedCRC == 0 && $head{82} == "\x00" && + substr( $head, 101, 24 ) == str_repeat( "\x00", 24 ) ) { + wfDebug( "$fname: no CRC, looks like MacBinary I\n" ); + $this->version = 1; + } elseif( $signature == 'mBIN' && $storedCRC == 0x185 ) { + // Mac IE 5.0 seems to insert this value in the CRC field. + // 5.2.3 works correctly; don't know about other versions. + wfDebug( "$fname: CRC doesn't match ($crc), looks like Mac IE 5.0\n" ); + $this->version = 3; + } else { + wfDebug( "$fname: CRC doesn't match ($crc) and not MacBinary I\n" ); + return false; + } + } + + $nameLength = ord( $head{1} ); + if( $nameLength < 1 || $nameLength > 63 ) { + wfDebug( "$fname: invalid filename size $nameLength\n" ); + return false; + } + $this->filename = substr( $head, 2, $nameLength ); + + $forks = unpack( "Ndata/Nresource", substr( $head, 83, 8 ) ); + $this->dataLength = $forks['data']; + $this->resourceLength = $forks['resource']; + $maxForkLength = 0x7fffff; + + if( $this->dataLength < 0 || $this->dataLength > $maxForkLength ) { + wfDebug( "$fname: invalid data fork length $this->dataLength\n" ); + return false; + } + + if( $this->resourceLength < 0 || $this->resourceLength > $maxForkLength ) { + wfDebug( "$fname: invalid resource fork size $this->resourceLength\n" ); + return false; + } + + wfDebug( "$fname: appears to be MacBinary $this->version, data length $this->dataLength\n" ); + $this->valid = true; + return true; + } + + /** + * Calculate a 16-bit CRC value as for MacBinary headers. + * Adapted from perl5 Convert::BinHex by Eryq, + * based on the mcvert utility (Doug Moore, April '87), + * with magic array thingy by Jim Van Verth. + * http://search.cpan.org/~eryq/Convert-BinHex-1.119/lib/Convert/BinHex.pm + * + * @param string $data + * @param int $seed + * @return int + * @access private + */ + function calcCRC( $data, $seed = 0 ) { + # An array useful for CRC calculations that use 0x1021 as the "seed": + $MAGIC = array( + 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, + 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, + 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, + 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de, + 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, + 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d, + 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, + 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc, + 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823, + 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b, + 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, + 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a, + 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41, + 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49, + 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70, + 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78, + 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f, + 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067, + 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e, + 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256, + 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d, + 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, + 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c, + 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634, + 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab, + 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3, + 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, + 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92, + 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, + 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1, + 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, + 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0 + ); + $len = strlen( $data ); + $crc = $seed; + for( $i = 0; $i < $len; $i++ ) { + $crc ^= ord( $data{$i} ) << 8; + $crc &= 0xFFFF; + $crc = ($crc << 8) ^ $MAGIC[$crc >> 8]; + $crc &= 0xFFFF; + } + return $crc; + } + + /** + * @param resource $destination + * @param int $bytesToCopy + * @return bool + * @access private + */ + function copyBytesTo( $destination, $bytesToCopy ) { + $bufferSize = 65536; + for( $remaining = $bytesToCopy; $remaining > 0; $remaining -= $bufferSize ) { + $thisChunkSize = min( $remaining, $bufferSize ); + $buffer = fread( $this->handle, $thisChunkSize ); + fwrite( $destination, $buffer ); + } + } + + /** + * Hex dump of the header for debugging + * @access private + */ + function hexdump( $data ) { + global $wgDebugLogFile; + if( !$wgDebugLogFile ) return; + + $width = 16; + $at = 0; + for( $remaining = strlen( $data ); $remaining > 0; $remaining -= $width ) { + $line = sprintf( "%04x:", $at ); + $printable = ''; + for( $i = 0; $i < $width && $remaining - $i > 0; $i++ ) { + $byte = ord( $data{$at++} ); + $line .= sprintf( " %02x", $byte ); + $printable .= ($byte >= 32 && $byte <= 126 ) + ? chr( $byte ) + : '.'; + } + if( $i < $width ) { + $line .= str_repeat( ' ', $width - $i ); + } + wfDebug( "MacBinary: $line $printable\n" ); + } + } +} + +?> \ No newline at end of file -- cgit v1.2.3-54-g00ecf