C＃等价于Java RSA / ECB / OAEPWithSHA-256AndMGF1Padding [英] C# equivalent to Java RSA/ECB/OAEPWithSHA-256AndMGF1Padding

问题描述

我试图在Java中的字符串加密和解密在C＃。
我试图与RSA / ECB / PKCS1PADDING首先，它的工作方式像一个魅力，但现在我试图切换到OAEP填充，但我不能使它的工作。加密工作正常，但不是解密。我改变的唯一的事情是Java和C＃中的算法名称我改变了rsa.Decrypt（data，true）从假到真。是否需要更多更改？

I am trying to encrypt at string in Java and decrypt in C#. I tried with RSA/ECB/PKCS1PADDING first and it worked like a charm, but now I'm trying to switch to OAEP padding, but I cannot make it work. The encryption works fine but not the decryption. The only things I changed was the algorithm name in Java and in C# I changed rsa.Decrypt(data, true) from false to true. Does it require more changes?

我得到的例外是解码OAEP填充时出错。

The exception I get is "Error occurred while decoding OAEP padding".

我的Java加密方法：

My Java encryption method:

public byte[] rsaEncrypt(byte[] data) {

    byte[] cipherData;

    try {

        RSAPublicKeySpec keySpec = new RSAPublicKeySpec(pubMod, pubExp);
        KeyFactory fact = KeyFactory.getInstance("RSA");
        PublicKey pubKey = fact.generatePublic(keySpec);

        Cipher cipher = Cipher.getInstance("RSA/ECB/OAEPWithSHA-256AndMGF1Padding");
        cipher.init(Cipher.ENCRYPT_MODE, pubKey);
        cipherData = cipher.doFinal(data);
        return cipherData;

    } catch (NoSuchAlgorithmException | IllegalBlockSizeException | InvalidKeyException | InvalidKeySpecException | NoSuchPaddingException | BadPaddingException e) {
        e.printStackTrace();
    }

    return null;
}

我的C＃解密方法：

private string RSADecrypt(byte[] data)
    {
        const string PrivateKey = *the key*;

        const int PROVIDER_RSA_FULL = 1;
        const string CONTAINER_NAME = "Tracker";

        CspParameters cspParams;
        cspParams = new CspParameters(PROVIDER_RSA_FULL);
        cspParams.KeyContainerName = CONTAINER_NAME;

        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cspParams);

        rsa.FromXmlString(PrivateKey);

        byte[] decrypted = rsa.Decrypt(data, true);

        String decryptedString = System.Text.Encoding.UTF8.GetString(decrypted);

        return decryptedString;
    }

推荐答案

256不能使用C＃。我改变了算法名为RSA / ECB / OAEPWithSHA-1AndMGF1Padding，它工作！

It seems to be SHA-256 that's not working with C#. I changed the algorithm name to "RSA/ECB/OAEPWithSHA-1AndMGF1Padding", and it worked!

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