Question

我有以下代码可以在Windows和Linux / Unix上运行，但不会解密在Linux / Unix上加密的加密文本，反之亦然。

我知道这也会每次生成相同的加密文本，但我删除了一些代码以达到最基本的。

我确信它与Charset编码无关，因为编码的String在两个操作系统上是相同的，即使SecretKey在两者上都是相同的。

import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;

public class Encryptor {

    private static final String password = "passwordKey";

    private static final Charset UTF_8 = Charset.forName("UTF-8");

    private static final byte [] salt = "test salt as string".getBytes(UTF_8);

    public static String encrypt(String text) throws UnsupportedEncodingException {

        IvParameterSpec ivSpec = new IvParameterSpec(password.getBytes(UTF_8));
        PBEParameterSpec parameterSpec = new PBEParameterSpec(salt, 10000, ivSpec);
        PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, 10000);
        SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("PBEWithSHA256AndAES_256");
        SecretKey key = secretKeyFactory.generateSecret(keySpec);

        Cipher cipher = Cipher.getInstance("PBEWithSHA256AndAES_256");
        cipher.init(Cipher.ENCRYPT_MODE, key, parameterSpec);

        byte [] encrypted = cipher.doFinal(text.getBytes(UTF_8));
        return Base64.encodeBase64String(encrypted);
    }

    public static String decrypt(String encryptedText) throws UnsupportedEncodingException {

        IvParameterSpec ivSpec = new IvParameterSpec(password.getBytes(UTF_8));
        PBEParameterSpec parameterSpec = new PBEParameterSpec(salt, 10000, ivSpec);
        PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, 10000);
        SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("PBEWithSHA256AndAES_256");
        SecretKey key = secretKeyFactory.generateSecret(keySpec);

        Cipher cipher = Cipher.getInstance("PBEWithSHA256AndAES_256");
        cipher.init(Cipher.DECRYPT_MODE, key, parameterSpec);
        byte [] decoded = Base64.decodeBase64String(encryptedText);
        byte [] decrypted = cipher.doFinal(decoded);
        return new String(decrypted, UTF_8);
    }

    public static void main(String args []) throws UnsupportedEncodingException {
        String encryptedFromWindows = "eFRvTevgk/oslll+234r5tdsss==";
        System.out.println(decrypt(encryptedFromWindows));
    }
}

例外：

Exception in thread "main" javax.crypto.BadPaddingException: Given final block not properly padded
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:811)
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:676)

Answer 1

问题是_64的JDK版本中的错误。升级到_121并成功运行。 IT不是已知的oracle错误，但他们在该版本中的另一个类似的加密问题中提到了该问题。

PBEWithSHA256AndAES_256解密适用于Windows而不适用于Unix / Linux

1 个答案: