Created
December 13, 2011 13:50
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謎のコンテンツ難読化（コンテンツをEPOCH Timeとメルセンヌツイスターで生成したランダムな値でXORにし、JSON Arrayでクライアントへ渡します）
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| <?php | |
| $str = urlencode('僕は友達が少ない（驚愕）'); | |
| $rand = mt_rand(0,floor(time()/100)); | |
| $seed = floor(time()/100)+$rand; | |
| $char=array($rand); | |
| for($i=0;$i<mb_strlen($str,'utf-8');$i++){ | |
| $hex = bin2hex(mb_substr($str , $i, 1, 'utf-8')); | |
| $char[] = intval($hex,16)^$seed; | |
| } | |
| $json = json_encode($char); | |
| ?> | |
| <body> | |
| ###SERVER SIDE###<br /> | |
| <?php echo "Seed: $seed<br /><br />Encrypted JSON: $json"?> | |
| <script> | |
| var json = '<?php echo $json ?>'; | |
| var a=JSON.parse(json); | |
| var s=Math.floor(parseInt(new Date/100000))+a[0]; | |
| var r=''; | |
| for (i in a) { | |
| if (i==0) continue; | |
| r += String.fromCharCode(a[i]^s); | |
| } | |
| r=decodeURI(r); | |
| alert('###Client Side###\nSeed: '+s+'\nDecoded: '+r); | |
| </script> | |
| </body> |
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