/// <summary>
/// This method is used to sign the data using the private key
/// </summary>
/// <param name="method"></param>
/// <param name="data"></param>
/// <param name="privateKeyFilePath"></param>
/// <returns></returns>
public static string Sign(string method, string data, string privateKeyFilePath)
{
RSACryptoServiceProvider rsaCsp = PemKeyUtils.GetRSAProviderFromPemFile(privateKeyFilePath);
string plainText = method + SerializeData(data);
byte[] dataBytes = Encoding.UTF8.GetBytes(plainText);
byte[] signatureBytes = rsaCsp.SignData(dataBytes, "SHA1");
return(Convert.ToBase64String(signatureBytes));
}
/// <summary>
/// This method is used to verified the signed data with the public key
/// </summary>
/// <param name="method"></param>
/// <param name="data"></param>
/// <param name="publicKeyPath"></param>
/// <param name="signature"></param>
/// <returns></returns>
public static bool Verify(string method, string data, string publicKeyPath, string signature)
{
string plainText = method + SerializeData(data);
byte[] dataBytes = Encoding.UTF8.GetBytes(plainText);
byte[] signBytes = Convert.FromBase64String(signature);
RSACryptoServiceProvider rsa = PemKeyUtils.GetRSAProviderFromPemFile(publicKeyPath);
bool valid = rsa.VerifyData(dataBytes, "SHA1", signBytes);
return(valid);
}