java.security.InvalidKeyException：算法错误：需要 DESede 或 TripleDES

Question

这段代码是我写的，我的key是："ooWqEPcw7KR/h/JIbrFCRHiEVaybvnB2".

    try
    {
        Base64Decoder base64Decoder=new Base64Decoder();

        String encryptType="DESede/ECB/PKCS5Padding";
        String workingKey="ooWqEPcw7KR/h/JIbrFCRHiEVaybvnB2";
        SecretKey secretKey=new SecretKeySpec(base64Decoder.decode(workingKey), encryptType);

        Cipher cipher=Cipher.getInstance(encryptType);
        cipher.init(1, secretKey);
    }
    catch(NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException e)
    {
        e.printStackTrace();
    }

但是我得到这个错误！！！

java.security.InvalidKeyException: Wrong algorithm: DESede or TripleDES required
    at com.sun.crypto.provider.DESedeCrypt.init(DESedeCrypt.java:65)
    at com.sun.crypto.provider.ElectronicCodeBook.init(ElectronicCodeBook.java:93)
    at com.sun.crypto.provider.CipherCore.init(CipherCore.java:582)
    at com.sun.crypto.provider.CipherCore.init(CipherCore.java:458)
    at  com.sun.crypto.provider.DESedeCipher.engineInit(DESedeCipher.java:166)
    at javax.crypto.Cipher.implInit(Cipher.java:802)
    at javax.crypto.Cipher.chooseProvider(Cipher.java:864)
    at javax.crypto.Cipher.init(Cipher.java:1249)
    at javax.crypto.Cipher.init(Cipher.java:1186)
    at EncryptText.main(EncryptText.java:24)

Answer 1

DESedeCrypt class 仅支持 DESede 和 TripleDES 算法，根据源代码：

void init(boolean decrypting, String algorithm, byte[] keys)
        throws InvalidKeyException {
    if (!algorithm.equalsIgnoreCase("DESede")
                && !algorithm.equalsIgnoreCase("TripleDES")) {
        throw new InvalidKeyException
            ("Wrong algorithm: DESede or TripleDES required");
    }

您的代码必须使用 SecretKey 中的两者之一。 Cipher 可以保持为 DESede/ECB/PKCS5Padding:

String workingKey = "ooWqEPcw7KR/h/JIbrFCRHiEVaybvnB2";
SecretKey secretKey = new SecretKeySpec(
        Base64.getDecoder().decode(workingKey), 
        "DESede");
Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
cipher.init(1, secretKey);

Answer 2

你应该把 SecretKeySpec 写成

SecretKey secretKey=new SecretKeySpec(base64Decoder.decode(workingKey),"DESede");

也使用 Cipher.ENCRYPT_MODE 和 Cipher.DECRYPT_MODE 代替常量。

java.security.InvalidKeyException：算法错误：需要 DESede 或 TripleDES

java.security.InvalidKeyException: Wrong algorithm: DESede or TripleDES required

java

encryption

3des

cryptography