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< $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