本篇文章将带大家一起学习用PHP实现加解密,代码具有一定参考价值,有需要的朋友可以看看。
<?php//加密函数function passport_encrypt($txt, $key) { srand((double)microtime() * 1000000); $encrypt_key = md5(rand(0, 32000)); $ctr = 0; $tmp = ''; for($i = 0;$i < strlen($txt); $i++) { $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr; $tmp .= $encrypt_key[$ctr].($txt[$i] ^ $encrypt_key[$ctr++]); } return base64_encode(passport_key($tmp, $key));}//解密函数function passport_decrypt($txt, $key) { $txt = passport_key(base64_decode($txt), $key); $tmp = ''; for($i = 0;$i < strlen($txt); $i++) { $md5 = $txt[$i]; $tmp .= $txt[++$i] ^ $md5; } return $tmp;}//上面两个函数用到的公共函数function passport_key($txt, $encrypt_key) { $encrypt_key = md5($encrypt_key); $ctr = 0; $tmp = ''; for($i = 0; $i < strlen($txt); $i++) { $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr; $tmp .= $txt[$i] ^ $encrypt_key[$ctr++]; } return $tmp;}//----------------------------------------//----------------------------------------//-------------示例-----------------------//----------------------------------------//----------------------------------------//$str = '你好,我是+-!少林a b张三丰';echo '<br>------key:aaa----------<br>';echo $x = passport_encrypt($str,'aaa');//值会变,其中一个如下 //AOdS7lWlU+IM+1fnALBV5QOOV7dchQfEX+MCwgf2U3BXeQcnVuNavgPAA+hbmlLJAWEHIVRnD7hYvgf/U+lS4gCKUrdVvVO3echo '<br>-----------------------<br>';echo passport_decrypt($x,'aaa'); echo '<br><br><br><br><br><br><br><br><br><br><br><br>';echo '<br>------key:bbb----------<br>';echo $y = passport_encrypt($str,'bbb');//值会变,其中一个如下//Ae0F5gD1C+oB9wC/DOZZ6AeKU7MCjleWUbEAmFGuAi4JLF8gUeFW4lKQUrYBmlrAA2MHIVcxBrMFv1PzXOha5QGABb8A7Qu/echo '<br>-----------------------<br>';echo passport_decrypt($y,'bbb');?>
<?php//加解密字符串函数,可以加密中文/*//加密echo $encode = authcode('爱迪生', 'ENCODE', '3'); //DvAHOdGFqa8xK4CDLnbr2mE//解密echo $decode = authcode($encode, 'DECODE', '3'); //爱迪生//密钥$auth_key = 34577;参数:$string字符串,$operation加密还是解密,$key密钥*/function authcode($string, $operation, $key = ''){ $key = md5($key ? $key : $GLOBALS['auth_key']); $key_length = strlen($key); $string = $operation == 'DECODE' ? base64_decode($string) : substr(md5($string . $key), 0, 8) . $string; $string_length = strlen($string); $rndkey = $box = array(); $result = ''; for ($i = 0; $i <= 255; $i++) { $rndkey[$i] = ord($key[$i % $key_length]); $box[$i] = $i; } for ($j = $i = 0; $i < 256; $i++) { $j = ($j + $box[$i] + $rndkey[$i]) % 256; $tmp = $box[$i]; $box[$i] = $box[$j]; $box[$j] = $tmp; } for ($a = $j = $i = 0; $i < $string_length; $i++) { $a = ($a + 1) % 256; $j = ($j + $box[$a]) % 256; $tmp = $box[$a]; $box[$a] = $box[$j]; $box[$j] = $tmp; $result .= chr(ord($string[$i]) ^ $box[($box[$a] + $box[$j]) % 256]); } if ($operation == 'DECODE') { if (substr($result, 0, 8) == substr(md5(substr($result, 8) . $key), 0, 8)) { return substr($result, 8); } else { return ''; } } else { return str_replace('=', '', base64_encode($result)); }}?>
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