| New file |
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| 0,0 → 1,149 |
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| <?php |
| |
| require_once(realpath(dirname(__FILE__) . '/') . '/secret/wp-hashcash.lib'); |
| |
| header("Pragma: no-cache"); |
| header("Expires: 0"); |
| header("Cache-Control: no-store, no-cache, must-revalidate"); |
| header("Cache-Control: post-check=0, pre-check=0", false); |
| $expired = array(); |
| |
| $function_name = hashcash_random_string(rand(6,18)); |
| $expired [] = $function_name; |
| |
| $js = "function $function_name (){"; |
| |
| $type = rand(0, 3) * 0; |
| switch($type){ |
| /* Addition of n times of field value / n, + modulus: |
| Time guarantee: 100 iterations or less */ |
| case 0: |
| $eax = hashcash_random_string(rand(8,10), $expired); |
| $expired [] = $eax; |
| |
| $val = hashcash_field_value(); |
| $inc = rand($val / 100, $val - 1); |
| $n = floor($val / $inc); |
| $r = $val % $inc; |
| |
| $js .= "var $eax = $inc; "; |
| for($i = 0; $i < $n - 1; $i++){ |
| $js .= "$eax += $inc; "; |
| } |
| |
| $js .= "$eax += $r; "; |
| $js .= "return $eax; "; |
| break; |
| |
| /* Conversion from binary: |
| Time guarantee: log(n) iterations or less */ |
| case 1: |
| $eax = hashcash_random_string(rand(8,10), $expired); |
| $expired [] = $eax; |
| |
| $ebx = hashcash_random_string(rand(8,10), $expired); |
| $expired [] = $ebx; |
| |
| $ecx = hashcash_random_string(rand(8,10), $expired); |
| $expired [] = $ecx; |
| |
| $val = hashcash_field_value(); |
| $binval = strrev(base_convert($val, 10, 2)); |
| $js .= "var $eax = \"$binval\"; "; |
| $js .= "var $ebx = 0; "; |
| $js .= "var $ecx = 0; "; |
| $js .= "while($ecx < $eax.length){ "; |
| $js .= "if($eax.charAt($ecx) == \"1\") { "; |
| $js .= "$ebx += Math.pow(2, $ecx); "; |
| $js .= "} "; |
| $js .= "$ecx++; "; |
| $js .= "} "; |
| $js .= "return $ebx; "; |
| |
| break; |
| |
| /* Multiplication of square roots: |
| Time guarantee: constant time */ |
| case 2: |
| $val = hashcash_field_value(); |
| $sqrt = floor(sqrt($val)); |
| $r = $val - ($sqrt * $sqrt); |
| $js .= "return $sqrt * $sqrt + $r; "; |
| break; |
| |
| /* Sum of random numbers to the final value: |
| Time guarantee: log(n) expected value */ |
| case 3: |
| $val = hashcash_field_value(); |
| $js .= "return "; |
| |
| $i = 0; |
| while($val > 0){ |
| if($i++ > 0) |
| $js .= "+"; |
| |
| $temp = rand(1, $val); |
| $val -= $temp; |
| $js .= $temp; |
| } |
| |
| $js .= ";"; |
| break; |
| } |
| |
| $js .= "} $function_name ();"; |
| |
| // pack bytes |
| function strToLongs($s) { |
| $l = array(); |
| |
| // pad $s to some multiple of 4 |
| $s = preg_split('//', $s, -1, PREG_SPLIT_NO_EMPTY); |
| |
| while(count($s) % 4 != 0){ |
| $s [] = ' '; |
| } |
| |
| for ($i = 0; $i < ceil(count($s)/4); $i++) { |
| $l[$i] = ord($s[$i*4]) + (ord($s[$i*4+1]) << 8) + (ord($s[$i*4+2]) << 16) + (ord($s[$i*4+3]) << 24); |
| } |
| |
| return $l; |
| } |
| |
| // xor all the bytes with a random key |
| $key = rand(21474836, 2126008810); |
| $js = strToLongs($js); |
| |
| for($i = 0; $i < count($js); $i++){ |
| $js[$i] = $js[$i] ^ $key; |
| } |
| |
| // libs function encapsulation |
| $libs_name = hashcash_random_string(rand(6,18), $expired); |
| $expired [] = $libs_name; |
| |
| $libs = "function $libs_name(){"; |
| |
| // write bytes to javascript, xor with key |
| $data_name = hashcash_random_string(rand(6,18), $expired); |
| $expired [] = $data_name; |
| |
| $libs .= "var $data_name = new Array(" . count($js) . "); "; |
| for($i = 0; $i < count($js); $i++){ |
| $libs .= $data_name . '[' . $i . '] = ' . $js[$i] . ' ^ ' . $key .'; '; |
| } |
| |
| // convert bytes back to string |
| $libs .= " var a = new Array($data_name.length); "; |
| $libs .= "for (var i=0; i<" . $data_name . ".length; i++) { "; |
| $libs .= 'a[i] = String.fromCharCode(' . $data_name .'[i] & 0xFF, ' . $data_name . '[i]>>>8 & 0xFF, '; |
| $libs .= $data_name . '[i]>>>16 & 0xFF, ' . $data_name . '[i]>>>24 & 0xFF); } '; |
| $libs .= "return eval(a.join('')); "; |
| |
| // call libs function |
| $libs .= "} $libs_name();"; |
| |
| // return code |
| echo $libs; |
| ?> |
| Property changes: |
|---|
| Added: svn:executable |
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| +* |
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| \ No newline at end of property |
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