Working on implementing the ServerContext and structuring things so that invoking the public interface is a little easier - trying to move out of proof-of-concept code to prototype code. Still need to rework how I deal with the context and credential handles, worried that they're not treated safe. Still need to reorganize a lot of where code lives. Very inconsistent so far.

Contexts/ContextNativeMethods.cs

@@ -0,0 +1,65 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NSspi.Contexts
+{
+    public static class ContextNativeMethods
+    {
+        /*
+        SECURITY_STATUS SEC_Entry AcceptSecurityContext(
+          _In_opt_     PCredHandle phCredential,
+          _Inout_      PCtxtHandle phContext,
+          _In_opt_     PSecBufferDesc pInput,
+          _In_         ULONG fContextReq,
+          _In_         ULONG TargetDataRep,
+          _Inout_opt_  PCtxtHandle phNewContext,
+          _Inout_opt_  PSecBufferDesc pOutput,
+          _Out_        PULONG pfContextAttr,
+          _Out_opt_    PTimeStamp ptsTimeStamp
+        );
+        */
+
+        [DllImport(
+            "Secur32.dll",
+            EntryPoint = "AcceptSecurityContext",
+            CallingConvention = CallingConvention.Winapi,
+            CharSet = CharSet.Unicode,
+            SetLastError = true
+        )]
+        public static extern SecurityStatus AcceptSecurityContext_1(
+            ref long credHandle,
+            IntPtr oldContextHandle,
+            IntPtr inputBuffer,
+            ContextAttrib requestedAttribs,
+            SecureBufferDataRep dataRep,
+            ref long newContextHandle,
+            IntPtr outputBuffer,
+            ref ContextAttrib outputAttribs,
+            ref long expiry
+        );
+
+
+        [DllImport(
+            "Secur32.dll",
+            EntryPoint = "AcceptSecurityContext",
+            CallingConvention = CallingConvention.Winapi,
+            CharSet = CharSet.Unicode,
+            SetLastError = true
+        )]
+        public static extern SecurityStatus AcceptSecurityContext_2(
+            ref long credHandle,
+            ref long oldContextHandle,
+            IntPtr inputBuffer,
+            ContextAttrib requestedAttribs,
+            SecureBufferDataRep dataRep,
+            ref long newContextHandle,
+            IntPtr outputBuffer,
+            ref ContextAttrib outputAttribs,
+            ref long expiry
+        );
+    }
+}