PHP可逆加密算法

AES加密

加密

function zAES_encrypt($str, $privateKey = "1234567812345678", $iv = "1234567812345678") {$encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $privateKey, $str, MCRYPT_MODE_CBC, $iv);return base64_encode($encrypted);}注：$iv 的长度根据 mcrypt_encrypt 方法中的第一个参数和第四个参数决定$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);

解密

function zAES_decrypt($str, $privateKey = "1234567812345678", $iv = "1234567812345678") {$encryptedData = base64_decode($str);return mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $privateKey, $encryptedData, MCRYPT_MODE_CBC, $iv);}

伪AES加密

加密

function encrypt($data, $key) {$key = md5($key); $x= 0; $len = strlen($data); $l= strlen($key); for ($i = 0; $i < $len; $i++) { if ($x == $l) { $x = 0; } $char .= $key{$x}; $x++; } for ($i = 0; $i < $len; $i++) { $str .= chr(ord($data{$i}) + (ord($char{$i})) % 256); } return base64_encode($str); }

解密

function decrypt($data, $key) { $key = md5($key); $x = 0; $data = base64_decode($data); $len = strlen($data); $l = strlen($key); for ($i = 0; $i < $len; $i++) { if ($x == $l) { $x = 0; } $char .= substr($key, $x, 1); $x++; } for ($i = 0; $i < $len; $i++) { if (ord(substr($data, $i, 1)) < ord(substr($char, $i, 1))) { $str .= chr((ord(substr($data, $i, 1)) + 256) - ord(substr($char, $i, 1))); } else { $str .= chr(ord(substr($data, $i, 1)) - ord(substr($char, $i, 1))); } } return $str; }