本文實例講述了PHP實現的AES雙向加密解密功能。分享給大家供大家參考，具體如下：
<?php
/*
* Created on 2018-9-1
*
* To change the template for this generated file go to
* Window - Preferences - PHPeclipse - PHP - Code Templates
*/
/**
用法：
Security::encrypt($str,$key);
Security::decrypt($str,$key);
*/
class Security {
public static function encrypt($input, $key) {
$size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
$input = Security::pkcs5_pad($input, $size);
$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
mcrypt_generic_init($td, $key, $iv);
$data = mcrypt_generic($td, $input);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
$data = base64_encode($data);
return $data;
}
private static function pkcs5_pad ($text, $blocksize) {
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}
public static function decrypt($sStr, $sKey) {
$decrypted= mcrypt_decrypt(
MCRYPT_RIJNDAEL_128,
$sKey,
base64_decode($sStr),
MCRYPT_MODE_ECB
);
$dec_s = strlen($decrypted);
$padding = ord($decrypted[$dec_s-1]);
$decrypted = substr($decrypted, 0, -$padding);
return $decrypted;
}
}
//用法示例：
$str = "www.ythuaji.com.cn";
$key = "123456";
echo "原始字符串：".$str."<br/>";
$pwdstr = Security::encrypt($str,$key);
echo "加密后：".$pwdstr."<br/>";
$destr = Security::decrypt($pwdstr,$key);
echo "解密結果：".$destr;
?>
運行結果：
原始字符串：www.ythuaji.com.cn
加密后：O0vbyikeZRVnXueCodfSFw==
解密結果：www.ythuaji.com.cn
希望本文所述對大家PHP程序設計有所幫助。
