34 lines
922 B
PHP
34 lines
922 B
PHP
<?php
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function getObfuscationSalt(){
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if(file_exists("idObfuscation_salt.php")){
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require "idObfuscation_salt.php";
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}else{
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$bytes=openssl_random_pseudo_bytes(4);
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$sf=fopen("idObfuscation_salt.php","w");
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fwrite($sf,chr(60)."?php\n");
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fwrite($sf,'$OBFUSCATION_SALT=0x'.bin2hex($bytes).";\n");
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fwrite($sf,"?".chr(62));
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fclose($sf);
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require "idObfuscation_salt.php";
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}
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return isset($OBFUSCATION_SALT)?$OBFUSCATION_SALT:0;
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}
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function obfdeobf($id){
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$salt=getObfuscationSalt()&0xFFFFFFFF;
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$id=$id&0xFFFFFFFF;
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for($i=0;$i<16;$i++){
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$id=$id^$salt;
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$id=(($id>>1)&0xFFFFFFFF)|(($id&0x00000001)<<31);
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$salt=(($salt<<1)&0xFFFFFFFF)|(($salt&0xA0000000)>>31);
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}
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return $id;
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}
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function obfuscateId($id){
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return base_convert(obfdeobf($id),10,36);
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}
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function deobfuscateId($id){
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return obfdeobf(base_convert($id,36,10));
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}
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//IMPORTANT: DO NOT ADD ANYTHING BELOW THE PHP CLOSING TAG, NOT EVEN EMPTY LINES!
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?>
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