Java和.NET互操作（RSA）签名 [英] Java and .NET interop on (RSA) signatures

问题描述

我在基于.net的智能卡上签名一些数据，并尝试在java环境中验证签名，但没有成功。

I'm signing some data on a .net-based smartcard and trying to verify that signature in a java environment - but without success.

（c＃）：

RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider(1024);
// In a different method, rsaParams.Exponent and rsaParams.Modulus are set
rsaProvider.ImportParameters(rsaParams);  // Here I'm importing the key
SHA1 sha1 = SHA1.Create();
byte[] signature = rsaProvider.SignData(data, sha1);

客户端（Java）：

Signature sig = Signature.getInstance("SHA1withRSA");
sig.initVerify(rsaPublicKey);     // initiate the signature with public key
sig.update(data); // update signature with the data that was signed by the card
sig.verify(signedData); // Test card signature - this always returns false

然后我尝试在Java客户端上创建签名（用于测试） - 并且证明在Java客户端上创建的签名与在智能卡上创建的签名不同。我这样创建：

I then tried to create the signature on the Java client (for testing) - and it turns out that the signature created on the Java client is different from the one created on the smartcard. I created it like this:

Signature sig = Signature.getInstance("SHA1withRSA");
sig.initSign(rsaPrivateKey);

sig.update(data);
locallySigned = sig.sign();

现在我明白签名是类似于传递数据+使用的算法的哈希。这是可能的实现不兼容？我缺少别的东西吗？谢谢！

Now I understand that the signature is something like the hash of (passed data + the used algorithm). Is it possible that the implementations are not compatible here? Am I missing something else? Thanks!

PS：是的，我验证了输入和输出都正确地从/传送到卡，关键参数设置，输入/

PS: Yes, I verified that both input and output are transferred correctly from/to the card, that the key parameters are set and that input/output are exactly the same.

修改：Java中的密钥生成：

Key Generation in Java:

// Create a key-pair and install the private key on the card
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");
keyGen.initialize(1024, random);

KeyPair keyPair = keyGen.genKeyPair();

privateKey = (RSAPrivateKey)keyPair.getPrivate();
publicKey = (RSAPublicKey)keyPair.getPublic();

，然后设置卡上的私钥的exp和mod。

and then I'm setting exp and mod of the private key on the card.

推荐答案

//在另一种方法中，设置rsaParams.Exponent和rsaParams.Modulus

// In a different method, rsaParams.Exponent and rsaParams.Modulus are set

要在RSA密钥中设置私钥指数，您应该使用 RSAParameters.D 。 RSAParameters.Exponent 用于公式指数。

To set the private exponent in an RSA key, you should use RSAParameters.D. RSAParameters.Exponent is for the public exponent.

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