小编Alt*_*rim的帖子

我正在尝试实现基于密码的加密算法,但是我得到了这个例外:

javax.crypto.BadPaddingException:给定最终块未正确填充

可能是什么问题？(我是Java新手.)

这是我的代码:

public class PasswordCrypter {

    private Key key;

    public PasswordCrypter(String password)  {
        try{
            KeyGenerator generator;
            generator = KeyGenerator.getInstance("DES");
            SecureRandom sec = new SecureRandom(password.getBytes());
            generator.init(sec);
            key = generator.generateKey();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    public byte[] encrypt(byte[] array) throws CrypterException {
        try{
            Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, key);

            return cipher.doFinal(array);
        } catch (Exception e) { 
            e.printStackTrace();
        }
        return null;
    }

    public byte[] decrypt(byte[] array) throws CrypterException{
        try{
            Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, key);

            return cipher.doFinal(array);
        } …