php与java通用AES加密解密算法

AES指高级加密标准（Advanced Encryption Standard）,是当前最流行的一种密码算法，在web应用开发，特别是对外提供接口时经常会用到，下面是我整理的一套php与java通用的AES加密解密算法。

php版代码如下：

<?php
class CryptAES
{
protected $cipher = MCRYPT_RIJNDAEL_128;
protected $mode = MCRYPT_MODE_ECB;
protected $pad_method = NULL;
protected $secret_key = '';
protected $iv = '';

public function set_cipher($cipher)
{
$this->cipher = $cipher;
}

public function set_mode($mode)
{
$this->mode = $mode;
}

public function set_iv($iv)
{
$this->iv = $iv;
}

public function set_key($key)
{
$this->secret_key = $key;
}

public function require_pkcs5()
{
$this->pad_method = 'pkcs5';
}

protected function pad_or_unpad($str, $ext)
{
if ( is_null($this->pad_method) )
{
return $str;
}
else
{
$func_name = __CLASS__ . '::' . $this->pad_method . '_' . $ext . 'pad';
if ( is_callable($func_name) )
{
$size = mcrypt_get_block_size($this->cipher, $this->mode);
return call_user_func($func_name, $str, $size);
}
}
return $str;
}

protected function pad($str)
{
return $this->pad_or_unpad($str, '');
}

protected function unpad($str)
{
return $this->pad_or_unpad($str, 'un');
}

public function encrypt($str)
{
$str = $this->pad($str);
$td = mcrypt_module_open($this->cipher, '', $this->mode, '');

if ( empty($this->iv) )
{
$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
}
else
{
$iv = $this->iv;
}

mcrypt_generic_init($td, $this->secret_key, $iv);
$cyper_text = mcrypt_generic($td, $str);
$rt=base64_encode($cyper_text);
//$rt = bin2hex($cyper_text);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);

return $rt;
}

public function decrypt($str){
$td = mcrypt_module_open($this->cipher, '', $this->mode, '');

if ( empty($this->iv) )
{
$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
}
else
{
$iv = $this->iv;
}

mcrypt_generic_init($td, $this->secret_key, $iv);
//$decrypted_text = mdecrypt_generic($td, self::hex2bin($str));
$decrypted_text = mdecrypt_generic($td, base64_decode($str));
$rt = $decrypted_text;
mcrypt_generic_deinit($td);
mcrypt_module_close($td);

return $this->unpad($rt);
}

public static function hex2bin($hexdata) {
$bindata = '';
$length = strlen($hexdata);
for ($i=0; $i amp;< $length; $i += 2)
{
$bindata .= chr(hexdec(substr($hexdata, $i, 2)));
}
return $bindata;
}

public static function pkcs5_pad($text, $blocksize)
{
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}

public static function pkcs5_unpad($text)
{
$pad = ord($text{strlen($text) - 1});
if ($pad > strlen($text)) return false;
if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) return false;
return substr($text, 0, -1 * $pad);
}
}

$keyStr = 'UITN25LMUQC436IM';
$plainText = 'this is a string will be AES_Encrypt';

$aes = new CryptAES();
$aes->set_key($keyStr);
$aes->require_pkcs5();
$encText = $aes->encrypt($plainText);
$decString = $aes->decrypt($encText);

echo $encText,"n",$decString;

?>

运行结果：

fhTD0NNIzv4jUEhJuC1htFFXJ/4S/rL6tDCJPiNvJ8mVLHWOD0HWweuxHynxoZf9

this is a string will be AES_Encrypt

java版代码如下：

import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

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

public class CryptAES {

private static final String AESTYPE ="AES/ECB/PKCS5Padding";

public static String AES_Encrypt(String keyStr, String plainText) {
byte[] encrypt = null;
try{
Key key = generateKey(keyStr);
Cipher cipher = Cipher.getInstance(AESTYPE);
cipher.init(Cipher.ENCRYPT_MODE, key);
encrypt = cipher.doFinal(plainText.getBytes());
}catch(Exception e){
e.printStackTrace();
}
return new String(Base64.encodeBase64(encrypt));
}

public static String AES_Decrypt(String keyStr, String encryptData) {
byte[] decrypt = null;
try{
Key key = generateKey(keyStr);
Cipher cipher = Cipher.getInstance(AESTYPE);
cipher.init(Cipher.DECRYPT_MODE, key);
decrypt = cipher.doFinal(Base64.decodeBase64(encryptData));
}catch(Exception e){
e.printStackTrace();
}
return new String(decrypt).trim();
}

private static Key generateKey(String key)throws Exception{
try{
SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES");
return keySpec;
}catch(Exception e){
e.printStackTrace();
throw e;
}

}

public static void main(String[] args) {

String keyStr = "UITN25LMUQC436IM";

String plainText = "this is a string will be AES_Encrypt";

String encText = AES_Encrypt(keyStr, plainText);
String decString = AES_Decrypt(keyStr, encText);

System.out.println(encText);
System.out.println(decString);

}
}

运行结果：

fhTD0NNIzv4jUEhJuC1htFFXJ/4S/rL6tDCJPiNvJ8mVLHWOD0HWweuxHynxoZf9

this is a string will be AES_Encrypt