在我的XOR明文带有一个密钥后,我得到一个地址,“010e010c15061b4117030f54060e54040e0642181b17”,作为十六进制类型.如果我想从这个地下室得到明文,我该怎么办PHP?
我尝试将其转换为字符串/ int,然后将其转换为XOR(三个字母).但它不行.
这是代码:
function xor_this($string) { // Let's define our key here $key = 'fpt'; // Our plaintext/ciphertext $text = $string; // Our output text $outText = ''; // Iterate through each character for($i=0; $i<strlen($text); ) { for($j=0; $j<strlen($key); $j++,$i++) { $outText .= ($text[$i] ^ $key[$j]); //echo 'i=' . $i . ',' . 'j=' . $j . ',' . $outText{$i} . '<br />'; // For debugging } } return $outText; } function strToHex($string) { $hex = ''; for ($i=0; $i < strlen($string); $i++) { $hex .= dechex(ord($string[$i])); } return $hex; } function hexToStr($hex) { $string = ''; for ($i=0; $i < strlen($hex)-1; $i+=2) { $string .= chr(hexdec($hex[$i].$hex[$i+1])); } return $string; } $a = "This is the test"; $b = xor_this($a); echo xor_this($b),'-------------'; // $c = strToHex($b); $e = xor_this($c); echo $e,'++++++++'; // $d = hexToStr($c); $f = xor_this($d); echo $f,'=================';
这就是结果:
This is the test————-
PHP Notice: Uninitialized string offset: 29 in C:\
Users\Administrator\Desktop\test.PHP on line 210 PHP Stack trace: PHP
1. {main}() C:\Users\Administrator\Desktop\test.PHP:0 PHP 2. xor_this() C:\Users\Administrator\Desktop\test.PHP:239Notice: Uninitialized string offset: 29 in
C:\Users\Administrator\Desktop\test.p hp on line 210Call Stack:
0.0005 674280 1. {main}() C:\Users\Administrator\Desktop\test.PHP:0
0.0022 674848 2. xor_this() C:\Users\Administrator\Desktop\test.PHP:23 9UBE^A►WEAVA►WEAV@◄WEARAFWECWB++++++++
This is zs$fs☺=================
为什么? “UBE ^A►WEAVA►WEAV@◄WEARAFWECWB”是我在实际工作中遇到麻烦的结果.
function xor_this($string) { // Let's define our key here $key = ('magic_key'); // Our plaintext/ciphertext $text = $string; // Our output text $outText = ''; // Iterate through each character for($i=0; $i<strlen($text); ) { for($j=0; ($j<strlen($key) && $i<strlen($text)); $j++,$i++) { $outText .= $text{$i} ^ $key{$j}; //echo 'i=' . $i . ',' . $outText{$i} . '<br />'; // For debugging } } return $outText; }
基本上还原文本(甚至数字都在),您可以使用相同的功能:
$textToObfuscate = "Some Text 12345"; $obfuscatedText = xor_this($textToObfuscate); $restoredText = xor_this($obfuscatedText);