protected virtual short ProcessMaxFragmentLengthExtension(IDictionary clientExtensions, IDictionary serverExtensions, byte alertDescription)
{
short maxFragmentLengthExtension = TlsExtensionsUtilities.GetMaxFragmentLengthExtension(serverExtensions);
if (maxFragmentLengthExtension >= 0 && (!MaxFragmentLength.IsValid((byte)maxFragmentLengthExtension) || (!mResumedSession && maxFragmentLengthExtension != TlsExtensionsUtilities.GetMaxFragmentLengthExtension(clientExtensions))))
{
throw new TlsFatalAlert(alertDescription);
}
return(maxFragmentLengthExtension);
}
protected static short EvaluateMaxFragmentLengthExtension(bool resumedSession, IDictionary clientExtensions, IDictionary serverExtensions, byte alertDescription)
{
short maxFragmentLengthExtension = TlsExtensionsUtilities.GetMaxFragmentLengthExtension(serverExtensions);
if (maxFragmentLengthExtension >= 0 && (!MaxFragmentLength.IsValid((byte)maxFragmentLengthExtension) || (!resumedSession && maxFragmentLengthExtension != TlsExtensionsUtilities.GetMaxFragmentLengthExtension(clientExtensions))))
{
throw new TlsFatalAlert(alertDescription);
}
return(maxFragmentLengthExtension);
}
public virtual void ProcessClientExtensions(IDictionary clientExtensions)
{
mClientExtensions = clientExtensions;
if (clientExtensions != null)
{
mEncryptThenMacOffered = TlsExtensionsUtilities.HasEncryptThenMacExtension(clientExtensions);
mMaxFragmentLengthOffered = TlsExtensionsUtilities.GetMaxFragmentLengthExtension(clientExtensions);
if (mMaxFragmentLengthOffered >= 0 && !MaxFragmentLength.IsValid((byte)mMaxFragmentLengthOffered))
{
throw new TlsFatalAlert(47);
}
mTruncatedHMacOffered = TlsExtensionsUtilities.HasTruncatedHMacExtension(clientExtensions);
mSupportedSignatureAlgorithms = TlsUtilities.GetSignatureAlgorithmsExtension(clientExtensions);
if (mSupportedSignatureAlgorithms != null && !TlsUtilities.IsSignatureAlgorithmsExtensionAllowed(mClientVersion))
{
throw new TlsFatalAlert(47);
}
mNamedCurves = TlsEccUtilities.GetSupportedEllipticCurvesExtension(clientExtensions);
mClientECPointFormats = TlsEccUtilities.GetSupportedPointFormatsExtension(clientExtensions);
}
}