C# 如何在wp8中对C中的数据进行签名

我正在开发wp8应用程序。我在第一个登录请求中向服务器发送公钥。作为响应，服务器向令牌发送其简单的base64字符串，其中包含大约1200-1300个字符，我需要使用私钥签名，然后在下一个请求中发送回服务器。现在，服务器使用我在第一个请求中发送的相应公钥验证令牌。我有正在工作的java代码，可以完成上面的事情

String privateKey = sharedPref.getString("privateKey", "");

byte [] decoded = Base64.decode(privateKey, Base64.NO_WRAP);

KeyFactory kf = KeyFactory.getInstance("RSA");
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(decoded);
PrivateKey privateKeyNew = kf.generatePrivate(keySpec);

String tokenSp = sharedPref.getString("token", "");
byte[] tokenBytes = tokenSp.getBytes();
Signature dsa = Signature.getInstance("SHA1withRSA");
dsa.initSign(privateKeyNew);
dsa.update(tokenBytes);
byte[] signedData = dsa.sign();

ByteArrayOutputStream baos = new ByteArrayOutputStream();
baos.write(tokenBytes);
baos.write(signedData);

byte[] finalout = baos.toByteArray();
signedToken = new String(Base64.encode(finalout, 0, finalout.length, Base64.NO_WRAP)); 

我想在c中实现同样的效果。我写的代码是：

UnicodeEncoding ByteConverter = new UnicodeEncoding();

CspParameters parameters = new CspParameters();
parameters.KeyContainerName = "MyContainer";
RSACryptoServiceProvider obj = new RSACryptoServiceProvider(parameters);

byte[] dataToEncrypt=ByteConverter.GetBytes(s[0]);
byte[] SignedData=obj.SignData(dataToEncrypt, "SHA256");

MemoryStream stream = new MemoryStream();
stream.Write(dataToEncrypt,0,dataToEncrypt.Count());
stream.Write(SignedData,0,SignedData.Count());

byte[] finalBytesToSend = stream.ToArray();

string s2 = Convert.ToBase64String(finalBytesToSend);
return s2;    

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我将SHA256作为公钥发送到服务器进行验证。我在c语言中所做的是否正确？

我相信您需要的是以下内容。您可能需要检查publicKeyXml并对其格式做一些工作

// create a RSA provider with a 1024 bits key
using(RSACryptoServiceProvider rsaProv = new RSACryptoServiceProvider(1024))
{
    // export public key and send it to server to obtain base64 token
    string publicKeyXml = rsaProv.ToXmlString(false);
    string base64TokenFromServer = GetTokenFromServer(publicKeyXml);

    // decode base64 token
    byte[] tokenBytes = Convert.FromBase64String(base64TokenFromServer);

    // sign token bytes using RSA provider's private key and SHA1
    byte[] tokenSignatureBytes;
    using (var ms = new MemoryStream(tokenBytes))
    {
        tokenSignatureBytes = rsaProv.SignData(ms, SHA1.Create());
    }

    // concat token bytes and signature bytes
    byte[] finalOut;
    using (var ms = new MemoryStream())
    {
        ms.Write(tokenBytes, 0, tokenBytes.Length);
        ms.Write(tokenSignatureBytes, 0, tokenSignatureBytes.Length);
        ms.Flush();
        finalOut = ms.ToArray();
    }

    // encode final out to base64
    string signedToken = Convert.ToBase64String(finalOut);
}

---

签名时，wp8 API中的Abstract SHA1类中没有名为Create的方法，这是标准的.NET Framework代码。你能试试新的系统。安全。加密。有SHA1ManagedSHA1，SHA1managed，SHA256，SHA256Managed。但是他们没有创建方法。我想在windows phone 8中实现。