AES128解密:javax.crypto.badpaddingexception pad块损坏

Question

我尝试解密从Web服务收到的加密数据.

加密是使用完成的AES 128.

我使用以下代码来解密数据:

public static String decrypt(String strToDecrypt)
{       
    try
    {
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding"); //AES/CBC/PKCS7Padding
        SecretKeySpec secretKey = new SecretKeySpec(AppConstants.AESEncryptionKey.getBytes("UTF8"), "AES");
        int blockSize = cipher.getBlockSize();
        cipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec(new byte[blockSize])); //new IvParameterSpec(new byte[16])
        byte decBytes[] = cipher.doFinal(Base64.decode(strToDecrypt, 0));
        // byte decBytes[] = cipher.doFinal(Base64.decodeBase64(strToDecrypt));
        String decStr = new String(decBytes);
        System.out.println("After decryption :" + decStr);
        return decStr;
    }
    catch (Exception e)
    {
        System.out.println("Exception in decryption : " + e.getMessage());
    }
    return null;
}

在

cipher.doFinal()

我得到以下例外:

javax.crypto.badpaddingexception pad块损坏

我经历了我的帖子,但最终没有解决方案.我被困在这里.

Answer 1

SecureRandom sr = SecureRandom.getInstance("SHA1PRNG","Crypto");

工作得很好

注意:此代码仅适用于Android 6以下的设备.从Android 7.0开始,"Crypto" 提供程序已被删除,因此此代码将失败.