How to import public and prive key in RSA parameters

Hello,

I am using a code like the one below in ASP .NET as I am signing a string with a random generated RSAParameters. I would like to use prive and public keys from a .pfx file, located on the server. How can I import the keys into the RSAParameters

private void Page_Load(object sender, System.EventArgs e)

{

if (!IsPostBack)

{

RSACryptoServiceProvider rCSP = new RSACryptoServiceProvider();

RSAParameters rsaPrivateParam = new RSAParameters();

rsaPrivateParam = rCSP.ExportParameters(true);

Session["param"] = rsaPrivateParam;

}

byte[] result;

byte[] strToSign;

RSACryptoServiceProvider rsaCSP = new RSACryptoServiceProvider();

strToSign = generateHash("This is the string to sign");

RSAParameters rsaPrivateParams = new RSAParameters();

rsaPrivateParams = (RSAParameters) Session["param"];

rsaCSP.ImportParameters(rsaPrivateParams);

result = rsaCSP.SignHash(strToSign, CryptoConfig.MapNameToOID("SHA1"));

}

private byte[] generateHash(string MessageString)

{

byte[] HashValue;

UnicodeEncoding UE = new UnicodeEncoding();

byte[] MessageBytes = UE.GetBytes(MessageString);

SHA1Managed SHhash = new SHA1Managed();

HashValue = SHhash.ComputeHash(MessageBytes);

return HashValue;

}

Thanks,

Alex

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