protected override void ProcessAsTls1()
{
ServerContext context = (ServerContext)this.Context;
int length = this.ReadInt16 ();
byte[] signature = this.ReadBytes (length);
// Verify signature
MD5SHA1 hash = new MD5SHA1();
hash.ComputeHash(
context.HandshakeMessages.ToArray(),
0,
(int)context.HandshakeMessages.Length);
if (!hash.VerifySignature(context.ClientSettings.CertificateRSA, signature))
{
throw new TlsException (AlertDescription.HandshakeFailiure, "Handshake Failure.");
}
}
private void verifySignature()
{
MD5SHA1 hash = new MD5SHA1();
// Calculate size of server params
int size = rsaParams.Modulus.Length + rsaParams.Exponent.Length + 4;
// Create server params array
TlsStream stream = new TlsStream();
stream.Write(this.Context.RandomCS);
stream.Write(this.ToArray(), 0, size);
hash.ComputeHash(stream.ToArray());
stream.Reset();
bool isValidSignature = hash.VerifySignature(
this.Context.ServerSettings.CertificateRSA,
this.signedParams);
if (!isValidSignature)
{
throw new TlsException(
AlertDescription.DecodeError,
"Data was not signed with the server certificate.");
}
}