PHP mcrypt_encrypt使用给定的 cipher 和 mode 加密的数据，没有使用pkcs5_pad()函数填充的情况下，如果数据长度不是n*分组大小，则在其后使用“0”补齐。

Java 不能使用AES/ECB/PKCS5Padding，因为填充方式与php不同，不能正常的解密

在java中应该使用AES/ECB/NoPadding方式，手动使用"0",填充补齐

一、PHP加密解密类示例：

/**

* AES

* AES加密解密算法

* Created by PhpStorm.

* Date: 2015/4/28

* Time: 15:41

*/

namespace Fin\App\Library\Util;

class AES {

/**

* 算法,另外还有192和256两种长度

*/

const CIPHER = MCRYPT_RIJNDAEL_128;

/**

* 模式

*/

const MODE = MCRYPT_MODE_ECB;

/**

* 加密

* @param string $key 密钥

* @param string $str 需加密的字符串

*

* @return string

*/

static public function encode($key, $str)

{

if(empty($key)){

$key = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";

}

$size = mcrypt_get_iv_size(self::CIPHER, self::MODE);

$iv = mcrypt_create_iv($size, MCRYPT_RAND);

$string = mcrypt_encrypt(self::CIPHER, $key, $str, self::MODE, $iv);

$string = base64_encode($string);

return $string;

}

/**

* 解密

* @param type $key

* @param type $str

*

* @return string

*/

static public function decode($key, $str)

{

if(empty($key)){

$key = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";

}

$size = mcrypt_get_iv_size(self::CIPHER, self::MODE);

$iv = mcrypt_create_iv($size, MCRYPT_RAND);

$string = base64_decode($str);

$string = mcrypt_decrypt(self::CIPHER, $key, $string, self::MODE, $iv);

/**

* 解决下边问题

* the given cipher and mode. If the size of the data is not n * blocksize,

* the data will be padded with '\0'.

*/

$string = trim($string);

return $string;

}

}

二、 JAVA加密解密类示例：

import javax.crypto.Cipher;

import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;

import org.apache.commons.lang3.*;

public class Security {

public static String encrypt(String input, String key) {

byte[] crypted = null;

try {

input = StringUtils.rightPad(input, 16, "\0");

SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");

Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");

cipher.init(Cipher.ENCRYPT_MODE, skey);

crypted = cipher.doFinal(input.getBytes());

} catch (Exception e) {

System.out.println(e.toString());

}

return new String(Base64.encodeBase64(crypted));

}

public static String decrypt(String input, String key) {

byte[] output = null;

try {

SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");

Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");

cipher.init(Cipher.DECRYPT_MODE, skey);

output = cipher.doFinal(Base64.decodeBase64(input));

} catch (Exception e) {

System.out.println(e.toString());

}

return new String(output);

}

public static void main(String[] args) {

String key = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";

String data = "412016278912497";

System.out.println(Security.encrypt(data, key));

System.out.println(Security.decrypt(Security.encrypt(data, key), key));

}

}