时间:2021-07-01 10:21:17 帮助过:3人阅读
void hdth_normal_decode(char * outstr,char * instr){ int i=0; int j = 0; int len = strlen(instr); for(i=0;i
给个原文转为密文的例子:
原文:www.comunits.net密文:jmjmjmqhflrlplhmqlllgmfmqhqlhlgm
回复讨论(解决方案)
先移植解密函数到 php
function hdth_normal_decode($in) { $out = ''; $len = strlen($in); for($i=0; $i<$len; $i+=2) { $h = ord($in{$i}) - ord('c'); $l = ord($in{$i+1}) - ord('f'); $c = ($l << 4) + ($h & 0xf); $out .= chr($c); } return $out;}然后求其逆运算function hdth_normal_encode($in) { $out = ''; $len = strlen($in); for($i=0; $i<$len; $i++) { $c = ord($in{$i}); $l = ($c >> 4) + ord('f'); $h = ($c & 0xf) + ord('c'); $out .= chr($h) . chr($l); } return $out;}测试一下echo hdth_normal_encode('www.comunits.net');jmjmjmqhflrlplhmqlllgmfmqhqlhlgm