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| static public string Signature(string _sPrivateKeyXML,string _sDataToSign, ref string __sMessErr)
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSA.FromXmlString(_sPrivateKeyXML);
//Create a new instance of RSAPKCS1SignatureFormatter.
RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(RSA);
RSAFormatter.SetHashAlgorithm("SHA1");
//Create a new instance of SHA1CryptoServiceProvider.
SHA1CryptoServiceProvider UnCrypto = new SHA1CryptoServiceProvider();
byte[] DataSign = Encoding.ASCII.GetBytes(_sDataToSign);
byte[] Sign = UnCrypto.ComputeHash(DataSign);
byte[] SignedHash = RSAFormatter.CreateSignature(Sign);
return Convert.ToBase64String(SignedHash);
}
catch (CryptographicException e)
{
__sMessErr = e.ToString();
return null;
}
} |
