function getHashdata($algorithm) { switch ($algorithm) { case 'md5': case 'sha1': break; default: return $this->error('bad algorithm "' . $algorithm . '" in getHashdata()'); break; } if (@$this->info['fileformat'] == 'ogg' && @$this->info['audio']['dataformat'] == 'vorbis') { // We cannot get an identical md5_data value for Ogg files where the comments // span more than 1 Ogg page (compared to the same audio data with smaller // comments) using the normal getID3() method of MD5'ing the data between the // end of the comments and the end of the file (minus any trailing tags), // because the page sequence numbers of the pages that the audio data is on // do not match. Under normal circumstances, where comments are smaller than // the nominal 4-8kB page size, then this is not a problem, but if there are // very large comments, the only way around it is to strip off the comment // tags with vorbiscomment and MD5 that file. // This procedure must be applied to ALL Ogg files, not just the ones with // comments larger than 1 page, because the below method simply MD5's the // whole file with the comments stripped, not just the portion after the // comments block (which is the standard getID3() method. // The above-mentioned problem of comments spanning multiple pages and changing // page sequence numbers likely happens for OggSpeex and OggFLAC as well, but // currently vorbiscomment only works on OggVorbis files. if ((bool) ini_get('safe_mode')) { $this->info['warning'][] = 'Failed making system call to vorbiscomment.exe - ' . $algorithm . '_data is incorrect - error returned: PHP running in Safe Mode (backtick operator not available)'; $this->info[$algorithm . '_data'] = false; } else { // Prevent user from aborting script $old_abort = ignore_user_abort(true); // Create empty file $empty = tempnam('*', 'getID3'); touch($empty); // Use vorbiscomment to make temp file without comments $temp = tempnam('*', 'getID3'); $file = $this->info['filenamepath']; if (GETID3_OS_ISWINDOWS) { if (file_exists(GETID3_HELPERAPPSDIR . 'vorbiscomment.exe')) { $commandline = '"' . GETID3_HELPERAPPSDIR . 'vorbiscomment.exe" -w -c "' . $empty . '" "' . $file . '" "' . $temp . '"'; $VorbisCommentError = `{$commandline}`; } else { $VorbisCommentError = 'vorbiscomment.exe not found in ' . GETID3_HELPERAPPSDIR; } } else { $commandline = 'vorbiscomment -w -c "' . $empty . '" "' . $file . '" "' . $temp . '" 2>&1'; $VorbisCommentError = `{$commandline}`; } if (!empty($VorbisCommentError)) { $this->info['warning'][] = 'Failed making system call to vorbiscomment(.exe) - ' . $algorithm . '_data will be incorrect. If vorbiscomment is unavailable, please download from http://www.vorbis.com/download.psp and put in the getID3() directory. Error returned: ' . $VorbisCommentError; $this->info[$algorithm . '_data'] = false; } else { // Get hash of newly created file switch ($algorithm) { case 'md5': $this->info[$algorithm . '_data'] = getid3_lib::md5_file($temp); break; case 'sha1': $this->info[$algorithm . '_data'] = getid3_lib::sha1_file($temp); break; } } // Clean up unlink($empty); unlink($temp); // Reset abort setting ignore_user_abort($old_abort); } } else { if (!empty($this->info['avdataoffset']) || isset($this->info['avdataend']) && $this->info['avdataend'] < $this->info['filesize']) { // get hash from part of file $this->info[$algorithm . '_data'] = getid3_lib::hash_data($this->info['filenamepath'], $this->info['avdataoffset'], $this->info['avdataend'], $algorithm); } else { // get hash from whole file switch ($algorithm) { case 'md5': $this->info[$algorithm . '_data'] = getid3_lib::md5_file($this->info['filenamepath']); break; case 'sha1': $this->info[$algorithm . '_data'] = getid3_lib::sha1_file($this->info['filenamepath']); break; } } } return true; }