public byte[] GetOutgoingBlob(byte[] incomingBlob, ChannelBinding channelbinding, ExtendedProtectionPolicy protectionPolicy)
{
ThrowIfDisposed();
SecurityBuffer incomingSecurity = null;
if (incomingBlob != null)
{
incomingSecurity = new SecurityBuffer(incomingBlob, BufferType.Token);
}
SecurityBuffer outgoingSecurity = new SecurityBuffer(null, BufferType.Token);
this.remoteCertificate = null;
int statusCode = 0;
if (this.isServer == true)
{
statusCode = SspiWrapper.AcceptSecurityContext(
this.credentialsHandle,
ref this.securityContext,
ServerStandardFlags | (this.clientCertRequired ? SspiContextFlags.MutualAuth : SspiContextFlags.Zero),
Endianness.Native,
incomingSecurity,
outgoingSecurity,
ref this.attributes
);
}
else
{
statusCode = SspiWrapper.InitializeSecurityContext(
this.credentialsHandle,
ref this.securityContext,
this.destination,
ClientStandardFlags,
Endianness.Native,
incomingSecurity,
outgoingSecurity,
ref this.attributes
);
}
if ((statusCode & unchecked ((int)0x80000000)) != 0)
{
this.Dispose();
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(statusCode));
}
if (statusCode == (int)SecurityStatus.OK)
{
// we're done
// ensure that the key negotiated is strong enough
if (SecurityUtils.ShouldValidateSslCipherStrength())
{
SslConnectionInfo connectionInfo = (SslConnectionInfo)SspiWrapper.QueryContextAttributes(this.securityContext, ContextAttribute.ConnectionInfo);
if (connectionInfo == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityNegotiationException(SR.GetString(SR.CannotObtainSslConnectionInfo)));
}
SecurityUtils.ValidateSslCipherStrength(connectionInfo.DataKeySize);
}
this.isCompleted = true;
}
else if (statusCode == (int)SecurityStatus.CredentialsNeeded)
{
// the server requires the client to supply creds
// Currently we dont attempt to find the client cert to choose at runtime
// so just re-call the function
AcquireClientCredentials();
if (this.ClientCertificate != null)
{
this.wasClientCertificateSent = true;
}
return(this.GetOutgoingBlob(incomingBlob, channelbinding, protectionPolicy));
}
else if (statusCode != (int)SecurityStatus.ContinueNeeded)
{
this.Dispose();
if (statusCode == (int)SecurityStatus.InternalError)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(statusCode, SR.GetString(SR.LsaAuthorityNotContacted)));
}
else
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(statusCode));
}
}
return(outgoingSecurity.token);
}
