public static RSAParameters GetPrivateKeyRSAParameters(string privateKeyString)
{
using (var rsa = RsaPEMHelper.PrivateKeyFromPem(privateKeyString))
{
return(rsa.ExportParameters(true));
}
}
public static byte[] CreateDigitalSignature(string privateKeyString, byte[] hashOfDataToSign)
{
using (var rsa = RsaPEMHelper.PrivateKeyFromPem(privateKeyString))
{
var rsaFormatter = new RSAPKCS1SignatureFormatter(rsa);
rsaFormatter.SetHashAlgorithm("SHA256");
return(rsaFormatter.CreateSignature(hashOfDataToSign));
}
}
public static byte[] DecryptData(string privateKeyString, byte[] dataToEncrypt)
{
byte[] plain;
using (var rsa = RsaPEMHelper.PrivateKeyFromPem(privateKeyString))
{
plain = rsa.Decrypt(dataToEncrypt, false);
}
return(plain);
}