Question

我最近遇到过一段代码，它使用BouncyCastle的PBE和CBC模式的AES（“PBEWithSHA1And256BitAES-CBC-BC”）。

public static final String ALGORITHM = "PBEWithSHA1And256BitAES-CBC-BC";

public static byte[] encrypt(final byte[] key, final byte[] salt, final byte[] plainText) throws CryptoException {
    try {
        // Create the encryption key
        final SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM, "BC");
        final PBEKeySpec keySpec = new PBEKeySpec(new String(key).toCharArray());
        final SecretKey secretKey = keyFactory.generateSecret(keySpec);

        // Encrypt the plain text
        final PBEParameterSpec cipherSpec = new PBEParameterSpec(salt, ITERATIONS);
        final Cipher cipher = Cipher.getInstance(ALGORITHM, "BC");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, cipherSpec);
        final byte[] encryptedBytes = cipher.doFinal(plainText);

        return encryptedBytes;

    } catch (final Throwable t) {
        throw new CryptoException(t.toString());
    }
}

如您所见，此代码未指定执行AES CBC加密的正确IV。

我不知道如何为密码指定salt，迭代次数和要使用的IV 。

我该怎么做？

谢谢。

Answer 1

你可以使用jasypt（java简单加密）PBEWithSHA1And256BitAES-CBC-BC

示例代码如下所示：

StandardPBEStringEncryptor myFirstEncryptor = new StandardPBEStringEncryptor();                                                                                                      
myFirstEncryptor.setProvider(new BouncyCastleProvider());                                                                                                    

myFirstEncryptor.setAlgorithm("PBEWITHSHA256AND256BITAES-CBC-BC");                                                                                         




FixedStringSaltGenerator generator = new FixedStringSaltGenerator();                                                                                         
generator.setSalt("justAnotherSaltforGX");
//myFirstEncryptor.setSaltGenerator(new ZeroSaltGenerator());                                                                                                    

myFirstEncryptor.setSaltGenerator(generator);                                                                                                                    

myFirstEncryptor.setKeyObtentionIterations(1);                                                                                                               
String myPassword="creditCard";                                                                                                                              
myFirstEncryptor.setPassword(myPassword);                                                                                                                    


String myText="Redeem Gacha ";                                                                                                         
String myFirstEncryptedText = myFirstEncryptor.encrypt(myText);                                                                                              

System.out.println("myFirstEncryptedText AES encrypt=="+myFirstEncryptedText);                                                                               

System.out.println("myFirstEncryptedText AES decrypt =="+myFirstEncryptor.decrypt(myFirstEncryptedText));

Answer 2

我认为如果你想使用IV，你需要生成一个随机密钥并在你现在加密纯文本的地方加密它。然后，您可以使用它来加密数据，使用IvParameterSpec指定IV。当然，您需要将加密密钥和IV存储在已加密的数据旁边。只有在使用相同的密钥加密多个明文时才需要这样做。

Answer 3

使用Jasypt和BouncyCastle 1.51（SpongyCastle），我可以使用以下

Algorithm: PBEWITHSHAAND128BITAES-CBC-BC
Algorithm: PBEWITHSHAAND192BITAES-CBC-BC
Algorithm: PBEWITHSHAAND256BITAES-CBC-BC
Algorithm: PBEWITHSHA256AND128BITAES-CBC-BC
Algorithm: PBEWITHSHA256AND192BITAES-CBC-BC
Algorithm: PBEWITHSHA256AND256BITAES-CBC-BC
Algorithm: PBEWITHMD5AND128BITAES-CBC-OPENSSL
Algorithm: PBEWITHMD5AND192BITAES-CBC-OPENSSL
Algorithm: PBEWITHMD5AND256BITAES-CBC-OPENSSL
Algorithm: PBEWITHMD5AND128BITAES-CBC-OPENSSL
Algorithm: PBEWITHMD5AND192BITAES-CBC-OPENSSL
Algorithm: PBEWITHMD5AND256BITAES-CBC-OPENSSL
Algorithm: PBEWITHSHAAND128BITAES-CBC-BC
Algorithm: PBEWITHSHAAND192BITAES-CBC-BC
Algorithm: PBEWITHSHAAND256BITAES-CBC-BC
Algorithm: PBEWITHSHA256AND128BITAES-CBC-BC
Algorithm: PBEWITHSHA256AND192BITAES-CBC-BC
Algorithm: PBEWITHSHA256AND256BITAES-CBC-BC

这种方式很容易

    StandardPBEByteEncryptor strongBinaryEncryptor = new StandardPBEByteEncryptor();
    strongBinaryEncryptor.setAlgorithm("PBEWITHSHAAND192BITAES-CBC-BC");
    strongBinaryEncryptor.setKeyObtentionIterations(1000);
    strongBinaryEncryptor.setProviderName(BouncyCastleProvider.PROVIDER_NAME);
    strongBinaryEncryptor.setPassword(password);

    byte[] encryptedBytes = strongBinaryEncryptor.encrypt(password);

您也可以设置SaltGenerator。

Bouncy Castle在CBC模式下使用AES进行基于密码的加密

3 个答案: