Java（Android）aes-128-cbc解密為純文本不一致

Question

我有Java（Android）中的代碼，可使用aes-128-cbc將純文本加密為密文。 我可以在PHP中將此密文解密為對應的明文，而在Java本身中則不能。

用於加密的Java代碼如下所示，

String iv = "0000000000000000"; //Ignore security concerns
IvParameterSpec ivspec;
ivspec = new IvParameterSpec(iv.getBytes());

String plaintext = "Top Secret Data";
byte[] encrypted = null;

Cipher cipher;
cipher = Cipher.getInstance("AES/CBC/NoPadding");
cipher.init(Cipher.ENCRYPT_MODE, seckey, ivspec);
encrypted = cipher.doFinal(padString(plaintext).getBytes());

ciphertext = Base64.encodeToString(encrypted, Base64.DEFAULT);

Log.i("Encrypted Base64 Data", ciphertext);

能夠成功解密的相應PHP代碼如下，

public function decrypt($data)
{
    $key = $_SESSION['sessionkey'];
    $iv = "0000000000000000";
    $data = base64_decode($data);

    $encobj = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);
    mcrypt_generic_init($encobj, $key, $iv);
    $decrypted = mdecrypt_generic($encobj, $data);

    mcrypt_generic_deinit($encobj);
    mcrypt_module_close($encobj);

    return utf8_encode(trim($decrypted));
}

有問題的用於解密的Java代碼會轉換為錯誤的純文本，如下所示

String iv = "0000000000000000";
IvParameterSpec ivspec;
ivspec = new IvParameterSpec(iv.getBytes());

byte[] decrypted = null;

Cipher cipher;
cipher = Cipher.getInstance("AES/CBC/NoPadding");
cipher.init(Cipher.DECRYPT_MODE, seckey, ivspec);
decrypted = cipher.doFinal(Base64.decode(ciphertext, Base64.DEFAULT));
Log.i("Decrypted Data",decrypted.toString());

如果有人可以指出Java解密代碼出了什么問題，我將不勝感激。

Answer 1

嘗試這個

  Cipher cipher;
  cipher = Cipher.getInstance("AES/CBC/NoPadding");
  cipher.init(Cipher.DECRYPT_MODE, seckey, ivspec);
  decrypted = cipher.doFinal(Base64.decode(ciphertext, Base64.DEFAULT)); //byte[]
  String result = new String(decrypted);
  Log.i("Decrypted Data",result);