//-------------------------------------------------------------------
        internal unsafe static int AcceptSecurityContext(
            ref SafeFreeCredentials inCredentials,
            ref SafeDeleteContext refContext,
            Interop.Secur32.ContextFlags inFlags,
            Interop.Secur32.Endianness endianness,
            SecurityBuffer inSecBuffer,
            SecurityBuffer[] inSecBuffers,
            SecurityBuffer outSecBuffer,
            ref Interop.Secur32.ContextFlags outFlags)
        {
#if TRACE_VERBOSE
            GlobalLog.Enter("SafeDeleteContext::AcceptSecurityContex");
            GlobalLog.Print("    credential       = " + inCredentials.ToString());
            GlobalLog.Print("    refContext       = " + Logging.ObjectToString(refContext));

            GlobalLog.Print("    inFlags          = " + inFlags);

            if (inSecBuffers == null)
            {
                GlobalLog.Print("    inSecBuffers     = (null)");
            }
            else
            {
                GlobalLog.Print("    inSecBuffers[]   = length:" + inSecBuffers.Length);
            }
#endif
            GlobalLog.Assert(outSecBuffer != null, "SafeDeleteContext::AcceptSecurityContext()|outSecBuffer != null");
            GlobalLog.Assert(inSecBuffer == null || inSecBuffers == null, "SafeDeleteContext::AcceptSecurityContext()|inSecBuffer == null || inSecBuffers == null");

            if (inCredentials == null)
            {
                throw new ArgumentNullException("inCredentials");
            }

            Interop.Secur32.SecurityBufferDescriptor inSecurityBufferDescriptor = null;
            if (inSecBuffer != null)
            {
                inSecurityBufferDescriptor = new Interop.Secur32.SecurityBufferDescriptor(1);
            }
            else if (inSecBuffers != null)
            {
                inSecurityBufferDescriptor = new Interop.Secur32.SecurityBufferDescriptor(inSecBuffers.Length);
            }

            Interop.Secur32.SecurityBufferDescriptor outSecurityBufferDescriptor = new Interop.Secur32.SecurityBufferDescriptor(1);

            // Actually, this is returned in outFlags.
            bool isSspiAllocated = (inFlags & Interop.Secur32.ContextFlags.AllocateMemory) != 0 ? true : false;

            int errorCode = -1;

            Interop.Secur32.SSPIHandle contextHandle = new Interop.Secur32.SSPIHandle();
            if (refContext != null)
            {
                contextHandle = refContext._handle;
            }

            // These are pinned user byte arrays passed along with SecurityBuffers.
            GCHandle[] pinnedInBytes = null;
            GCHandle pinnedOutBytes = new GCHandle();

            // Optional output buffer that may need to be freed.
            SafeFreeContextBuffer outFreeContextBuffer = null;
            try
            {
                pinnedOutBytes = GCHandle.Alloc(outSecBuffer.token, GCHandleType.Pinned);
                var inUnmanagedBuffer = new Interop.Secur32.SecurityBufferStruct[inSecurityBufferDescriptor == null ? 1 : inSecurityBufferDescriptor.Count];
                fixed (void* inUnmanagedBufferPtr = inUnmanagedBuffer)
                {
                    if (inSecurityBufferDescriptor != null)
                    {
                        // Fix Descriptor pointer that points to unmanaged SecurityBuffers.
                        inSecurityBufferDescriptor.UnmanagedPointer = inUnmanagedBufferPtr;
                        pinnedInBytes = new GCHandle[inSecurityBufferDescriptor.Count];
                        SecurityBuffer securityBuffer;
                        for (int index = 0; index < inSecurityBufferDescriptor.Count; ++index)
                        {
                            securityBuffer = inSecBuffer != null ? inSecBuffer : inSecBuffers[index];
                            if (securityBuffer != null)
                            {
                                // Copy the SecurityBuffer content into unmanaged place holder.
                                inUnmanagedBuffer[index].count = securityBuffer.size;
                                inUnmanagedBuffer[index].type = securityBuffer.type;

                                // Use the unmanaged token if it's not null; otherwise use the managed buffer.
                                if (securityBuffer.unmanagedToken != null)
                                {
                                    inUnmanagedBuffer[index].token = securityBuffer.unmanagedToken.DangerousGetHandle();
                                }
                                else if (securityBuffer.token == null || securityBuffer.token.Length == 0)
                                {
                                    inUnmanagedBuffer[index].token = IntPtr.Zero;
                                }
                                else
                                {
                                    pinnedInBytes[index] = GCHandle.Alloc(securityBuffer.token, GCHandleType.Pinned);
                                    inUnmanagedBuffer[index].token = Marshal.UnsafeAddrOfPinnedArrayElement(securityBuffer.token, securityBuffer.offset);
                                }
#if TRACE_VERBOSE
                                GlobalLog.Print("SecBuffer: cbBuffer:" + securityBuffer.size + " BufferType:" + securityBuffer.type);
#endif
                            }
                        }
                    }

                    var outUnmanagedBuffer = new Interop.Secur32.SecurityBufferStruct[1];
                    fixed (void* outUnmanagedBufferPtr = outUnmanagedBuffer)
                    {
                        // Fix Descriptor pointer that points to unmanaged SecurityBuffers.
                        outSecurityBufferDescriptor.UnmanagedPointer = outUnmanagedBufferPtr;
                        // Copy the SecurityBuffer content into unmanaged place holder.
                        outUnmanagedBuffer[0].count = outSecBuffer.size;
                        outUnmanagedBuffer[0].type = outSecBuffer.type;

                        if (outSecBuffer.token == null || outSecBuffer.token.Length == 0)
                        {
                            outUnmanagedBuffer[0].token = IntPtr.Zero;
                        }
                        else
                        {
                            outUnmanagedBuffer[0].token = Marshal.UnsafeAddrOfPinnedArrayElement(outSecBuffer.token, outSecBuffer.offset);
                        }

                        if (isSspiAllocated)
                        {
                            outFreeContextBuffer = SafeFreeContextBuffer.CreateEmptyHandle();
                        }

                        if (refContext == null || refContext.IsInvalid)
                        {
                            refContext = new SafeDeleteContext_SECURITY();
                        }

                        errorCode = MustRunAcceptSecurityContext_SECURITY(
                                        ref inCredentials,
                                        contextHandle.IsZero ? null : &contextHandle,
                                        inSecurityBufferDescriptor,
                                        inFlags,
                                        endianness,
                                        refContext,
                                        outSecurityBufferDescriptor,
                                        ref outFlags,
                                        outFreeContextBuffer);

                        GlobalLog.Print("SafeDeleteContext:AcceptSecurityContext  Marshalling OUT buffer");
                        // Get unmanaged buffer with index 0 as the only one passed into PInvoke.
                        outSecBuffer.size = outUnmanagedBuffer[0].count;
                        outSecBuffer.type = outUnmanagedBuffer[0].type;
                        if (outSecBuffer.size > 0)
                        {
                            outSecBuffer.token = new byte[outSecBuffer.size];
                            Marshal.Copy(outUnmanagedBuffer[0].token, outSecBuffer.token, 0, outSecBuffer.size);
                        }
                        else
                        {
                            outSecBuffer.token = null;
                        }
                    }
                }
            }
            finally
            {
                if (pinnedInBytes != null)
                {
                    for (int index = 0; index < pinnedInBytes.Length; index++)
                    {
                        if (pinnedInBytes[index].IsAllocated)
                        {
                            pinnedInBytes[index].Free();
                        }
                    }
                }

                if (pinnedOutBytes.IsAllocated)
                {
                    pinnedOutBytes.Free();
                }

                if (outFreeContextBuffer != null)
                {
                    outFreeContextBuffer.Dispose();
                }
            }

            GlobalLog.Leave("SafeDeleteContext::AcceptSecurityContex() unmanaged AcceptSecurityContex()", "errorCode:0x" + errorCode.ToString("x8") + " refContext:" + Logging.ObjectToString(refContext));

            return errorCode;
        }
        internal unsafe static int CompleteAuthToken(
            ref SafeDeleteContext refContext,
            SecurityBuffer[] inSecBuffers)
        {
            GlobalLog.Enter("SafeDeleteContext::CompleteAuthToken");
            GlobalLog.Print("    refContext       = " + Logging.ObjectToString(refContext));
#if TRACE_VERBOSE
            GlobalLog.Print("    inSecBuffers[]   = length:" + inSecBuffers.Length);
#endif
            GlobalLog.Assert(inSecBuffers != null, "SafeDeleteContext::CompleteAuthToken()|inSecBuffers == null");
            var inSecurityBufferDescriptor = new Interop.Secur32.SecurityBufferDescriptor(inSecBuffers.Length);

            int errorCode = (int)Interop.SecurityStatus.InvalidHandle;

            // These are pinned user byte arrays passed along with SecurityBuffers.
            GCHandle[] pinnedInBytes = null;

            var inUnmanagedBuffer = new Interop.Secur32.SecurityBufferStruct[inSecurityBufferDescriptor.Count];
            fixed (void* inUnmanagedBufferPtr = inUnmanagedBuffer)
            {
                // Fix Descriptor pointer that points to unmanaged SecurityBuffers.
                inSecurityBufferDescriptor.UnmanagedPointer = inUnmanagedBufferPtr;
                pinnedInBytes = new GCHandle[inSecurityBufferDescriptor.Count];
                SecurityBuffer securityBuffer;
                for (int index = 0; index < inSecurityBufferDescriptor.Count; ++index)
                {
                    securityBuffer = inSecBuffers[index];
                    if (securityBuffer != null)
                    {
                        inUnmanagedBuffer[index].count = securityBuffer.size;
                        inUnmanagedBuffer[index].type = securityBuffer.type;

                        // Use the unmanaged token if it's not null; otherwise use the managed buffer.
                        if (securityBuffer.unmanagedToken != null)
                        {
                            inUnmanagedBuffer[index].token = securityBuffer.unmanagedToken.DangerousGetHandle();
                        }
                        else if (securityBuffer.token == null || securityBuffer.token.Length == 0)
                        {
                            inUnmanagedBuffer[index].token = IntPtr.Zero;
                        }
                        else
                        {
                            pinnedInBytes[index] = GCHandle.Alloc(securityBuffer.token, GCHandleType.Pinned);
                            inUnmanagedBuffer[index].token = Marshal.UnsafeAddrOfPinnedArrayElement(securityBuffer.token, securityBuffer.offset);
                        }
#if TRACE_VERBOSE
                        GlobalLog.Print("SecBuffer: cbBuffer:" + securityBuffer.size + " BufferType:" + securityBuffer.type);
#endif
                    }
                }

                Interop.Secur32.SSPIHandle contextHandle = new Interop.Secur32.SSPIHandle();
                if (refContext != null)
                {
                    contextHandle = refContext._handle;
                }
                try
                {
                    if (refContext == null || refContext.IsInvalid)
                    {
                        refContext = new SafeDeleteContext_SECURITY();
                    }

                    try
                    {
                        bool ignore = false;
                        refContext.DangerousAddRef(ref ignore);
                        errorCode = Interop.Secur32.CompleteAuthToken(contextHandle.IsZero ? null : &contextHandle, inSecurityBufferDescriptor);
                    }
                    finally
                    {
                        refContext.DangerousRelease();
                    }
                }
                finally
                {
                    if (pinnedInBytes != null)
                    {
                        for (int index = 0; index < pinnedInBytes.Length; index++)
                        {
                            if (pinnedInBytes[index].IsAllocated)
                            {
                                pinnedInBytes[index].Free();
                            }
                        }
                    }
                }
            }

            GlobalLog.Leave("SafeDeleteContext::CompleteAuthToken() unmanaged CompleteAuthToken()", "errorCode:0x" + errorCode.ToString("x8") + " refContext:" + Logging.ObjectToString(refContext));

            return errorCode;
        }
예제 #3
0
        private unsafe static int EncryptDecryptHelper(OP op, SSPIInterface secModule, SafeDeleteContext context, SecurityBuffer[] input, uint sequenceNumber)
        {
            Interop.Secur32.SecurityBufferDescriptor sdcInOut = new Interop.Secur32.SecurityBufferDescriptor(input.Length);
            var unmanagedBuffer = new Interop.Secur32.SecurityBufferStruct[input.Length];

            fixed (Interop.Secur32.SecurityBufferStruct* unmanagedBufferPtr = unmanagedBuffer)
            {
                sdcInOut.UnmanagedPointer = unmanagedBufferPtr;
                GCHandle[] pinnedBuffers = new GCHandle[input.Length];
                byte[][] buffers = new byte[input.Length][];
                try
                {
                    for (int i = 0; i < input.Length; i++)
                    {
                        SecurityBuffer iBuffer = input[i];
                        unmanagedBuffer[i].count = iBuffer.size;
                        unmanagedBuffer[i].type = iBuffer.type;
                        if (iBuffer.token == null || iBuffer.token.Length == 0)
                        {
                            unmanagedBuffer[i].token = IntPtr.Zero;
                        }
                        else
                        {
                            pinnedBuffers[i] = GCHandle.Alloc(iBuffer.token, GCHandleType.Pinned);
                            unmanagedBuffer[i].token = Marshal.UnsafeAddrOfPinnedArrayElement(iBuffer.token, iBuffer.offset);
                            buffers[i] = iBuffer.token;
                        }
                    }

                    // The result is written in the input Buffer passed as type=BufferType.Data.
                    int errorCode;
                    switch (op)
                    {
                        case OP.Encrypt:
                            errorCode = secModule.EncryptMessage(context, sdcInOut, sequenceNumber);
                            break;

                        case OP.Decrypt:
                            errorCode = secModule.DecryptMessage(context, sdcInOut, sequenceNumber);
                            break;

                        case OP.MakeSignature:
                            errorCode = secModule.MakeSignature(context, sdcInOut, sequenceNumber);
                            break;

                        case OP.VerifySignature:
                            errorCode = secModule.VerifySignature(context, sdcInOut, sequenceNumber);
                            break;

                        default:
                            GlobalLog.Assert("SSPIWrapper::EncryptDecryptHelper", "Unknown OP: " + op);
                            throw NotImplemented.ByDesignWithMessage(SR.net_MethodNotImplementedException);
                    }

                    // Marshalling back returned sizes / data.
                    for (int i = 0; i < input.Length; i++)
                    {
                        SecurityBuffer iBuffer = input[i];
                        iBuffer.size = unmanagedBuffer[i].count;
                        iBuffer.type = unmanagedBuffer[i].type;

                        if (iBuffer.size == 0)
                        {
                            iBuffer.offset = 0;
                            iBuffer.token = null;
                        }
                        else
                        {
                            checked
                            {
                                // Find the buffer this is inside of.  Usually they all point inside buffer 0.
                                int j;
                                for (j = 0; j < input.Length; j++)
                                {
                                    if (buffers[j] == null)
                                    {
                                        continue;
                                    }

                                    byte* bufferAddress = (byte*)Marshal.UnsafeAddrOfPinnedArrayElement(buffers[j], 0);
                                    if ((byte*)unmanagedBuffer[i].token >= bufferAddress &&
                                        (byte*)unmanagedBuffer[i].token + iBuffer.size <= bufferAddress + buffers[j].Length)
                                    {
                                        iBuffer.offset = (int)((byte*)unmanagedBuffer[i].token - bufferAddress);
                                        iBuffer.token = buffers[j];
                                        break;
                                    }
                                }

                                if (j >= input.Length)
                                {
                                    GlobalLog.Assert("SSPIWrapper::EncryptDecryptHelper", "Output buffer out of range.");
                                    iBuffer.size = 0;
                                    iBuffer.offset = 0;
                                    iBuffer.token = null;
                                }
                            }
                        }
                        
                        // Backup validate the new sizes.
                        GlobalLog.Assert(iBuffer.offset >= 0 && iBuffer.offset <= (iBuffer.token == null ? 0 : iBuffer.token.Length), "SSPIWrapper::EncryptDecryptHelper|'offset' out of range.  [{0}]", iBuffer.offset);
                        GlobalLog.Assert(iBuffer.size >= 0 && iBuffer.size <= (iBuffer.token == null ? 0 : iBuffer.token.Length - iBuffer.offset), "SSPIWrapper::EncryptDecryptHelper|'size' out of range.  [{0}]", iBuffer.size);
                    }

                    if (errorCode != 0 && NetEventSource.Log.IsEnabled())
                    {                         
                        if (errorCode == Interop.Secur32.SEC_I_RENEGOTIATE)
                        {
                            NetEventSource.PrintError(NetEventSource.ComponentType.Security, SR.Format(SR.event_OperationReturnedSomething, op, "SEC_I_RENEGOTIATE"));
                        }
                        else
                        {
                            NetEventSource.PrintError(NetEventSource.ComponentType.Security, SR.Format(SR.net_log_operation_failed_with_error, op, String.Format(CultureInfo.CurrentCulture, "0X{0:X}", errorCode)));
                        }
                    }

                    return errorCode;
                }
                finally
                {
                    for (int i = 0; i < pinnedBuffers.Length; ++i)
                    {
                        if (pinnedBuffers[i].IsAllocated)
                        {
                            pinnedBuffers[i].Free();
                        }
                    }
                }
            }
        }
예제 #4
0
        private unsafe SecurityStatus EncryptDecryptHelper(OP op, SafeDeleteContext context, SecurityBuffer[] input, uint sequenceNumber)
        {
            Interop.Secur32.SecurityBufferDescriptor sdcInOut = new Interop.Secur32.SecurityBufferDescriptor(input.Length);
            var unmanagedBuffer = new Interop.Secur32.SecurityBufferStruct[input.Length];

            fixed(Interop.Secur32.SecurityBufferStruct *unmanagedBufferPtr = unmanagedBuffer)
            {
                sdcInOut.UnmanagedPointer = unmanagedBufferPtr;
                GCHandle[] pinnedBuffers = new GCHandle[input.Length];
                byte[][]   buffers       = new byte[input.Length][];
                try
                {
                    for (int i = 0; i < input.Length; i++)
                    {
                        SecurityBuffer iBuffer = input[i];
                        unmanagedBuffer[i].count = iBuffer.size;
                        unmanagedBuffer[i].type  = iBuffer.type;
                        if (iBuffer.token == null || iBuffer.token.Length == 0)
                        {
                            unmanagedBuffer[i].token = IntPtr.Zero;
                        }
                        else
                        {
                            pinnedBuffers[i]         = GCHandle.Alloc(iBuffer.token, GCHandleType.Pinned);
                            unmanagedBuffer[i].token = Marshal.UnsafeAddrOfPinnedArrayElement(iBuffer.token, iBuffer.offset);
                            buffers[i] = iBuffer.token;
                        }
                    }

                    // The result is written in the input Buffer passed as type=BufferType.Data.
                    int errorCode;
                    switch (op)
                    {
                    case OP.Encrypt:
                        errorCode = EncryptMessage(context, sdcInOut, sequenceNumber);
                        break;

                    case OP.Decrypt:
                        errorCode = DecryptMessage(context, sdcInOut, sequenceNumber);
                        break;

                    default: throw NotImplemented.ByDesignWithMessage(SR.net_MethodNotImplementedException);
                    }

                    // Marshalling back returned sizes / data.
                    for (int i = 0; i < input.Length; i++)
                    {
                        SecurityBuffer iBuffer = input[i];
                        iBuffer.size = unmanagedBuffer[i].count;
                        iBuffer.type = unmanagedBuffer[i].type;

                        if (iBuffer.size == 0)
                        {
                            iBuffer.offset = 0;
                            iBuffer.token  = null;
                        }
                        else
                        {
                            checked
                            {
                                // Find the buffer this is inside of.  Usually they all point inside buffer 0.
                                int j;
                                for (j = 0; j < input.Length; j++)
                                {
                                    if (buffers[j] == null)
                                    {
                                        continue;
                                    }

                                    byte *bufferAddress = (byte *)Marshal.UnsafeAddrOfPinnedArrayElement(buffers[j], 0);
                                    if ((byte *)unmanagedBuffer[i].token >= bufferAddress &&
                                        (byte *)unmanagedBuffer[i].token + iBuffer.size <= bufferAddress + buffers[j].Length)
                                    {
                                        iBuffer.offset = (int)((byte *)unmanagedBuffer[i].token - bufferAddress);
                                        iBuffer.token  = buffers[j];
                                        break;
                                    }
                                }

                                if (j >= input.Length)
                                {
                                    GlobalLog.Assert("SSPIWrapper::EncryptDecryptHelper", "Output buffer out of range.");
                                    iBuffer.size   = 0;
                                    iBuffer.offset = 0;
                                    iBuffer.token  = null;
                                }
                            }
                        }

                        // Backup validate the new sizes.
                        GlobalLog.Assert(iBuffer.offset >= 0 && iBuffer.offset <= (iBuffer.token == null ? 0 : iBuffer.token.Length), "SSPIWrapper::EncryptDecryptHelper|'offset' out of range.  [{0}]", iBuffer.offset);
                        GlobalLog.Assert(iBuffer.size >= 0 && iBuffer.size <= (iBuffer.token == null ? 0 : iBuffer.token.Length - iBuffer.offset), "SSPIWrapper::EncryptDecryptHelper|'size' out of range.  [{0}]", iBuffer.size);
                    }

                    if (errorCode != 0 && Logging.On)
                    {
                        if (errorCode == 0x90321)
                        {
                            Logging.PrintError(Logging.Web, SR.Format(SR.net_log_operation_returned_something, op, "SEC_I_RENEGOTIATE"));
                        }
                        else
                        {
                            Logging.PrintError(Logging.Web, SR.Format(SR.net_log_operation_failed_with_error, op, String.Format(CultureInfo.CurrentCulture, "0X{0:X}", errorCode)));
                        }
                    }
                    return(MapToSecurityStatus((Interop.SecurityStatus)errorCode));
                }
                finally
                {
                    for (int i = 0; i < pinnedBuffers.Length; ++i)
                    {
                        if (pinnedBuffers[i].IsAllocated)
                        {
                            pinnedBuffers[i].Free();
                        }
                    }
                }
            }
        }
        //-------------------------------------------------------------------
        internal unsafe static int AcceptSecurityContext(
            ref SafeFreeCredentials inCredentials,
            ref SafeDeleteContext refContext,
            Interop.Secur32.ContextFlags inFlags,
            Interop.Secur32.Endianness endianness,
            SecurityBuffer inSecBuffer,
            SecurityBuffer[] inSecBuffers,
            SecurityBuffer outSecBuffer,
            ref Interop.Secur32.ContextFlags outFlags)
        {
#if TRACE_VERBOSE
            GlobalLog.Enter("SafeDeleteContext::AcceptSecurityContex");
            GlobalLog.Print("    credential       = " + inCredentials.ToString());
            GlobalLog.Print("    refContext       = " + Logging.ObjectToString(refContext));

            GlobalLog.Print("    inFlags          = " + inFlags);

            if (inSecBuffers == null)
            {
                GlobalLog.Print("    inSecBuffers     = (null)");
            }
            else
            {
                GlobalLog.Print("    inSecBuffers[]   = length:" + inSecBuffers.Length);
            }
#endif
            GlobalLog.Assert(outSecBuffer != null, "SafeDeleteContext::AcceptSecurityContext()|outSecBuffer != null");
            GlobalLog.Assert(inSecBuffer == null || inSecBuffers == null, "SafeDeleteContext::AcceptSecurityContext()|inSecBuffer == null || inSecBuffers == null");

            if (inCredentials == null)
            {
                throw new ArgumentNullException("inCredentials");
            }

            Interop.Secur32.SecurityBufferDescriptor inSecurityBufferDescriptor = null;
            if (inSecBuffer != null)
            {
                inSecurityBufferDescriptor = new Interop.Secur32.SecurityBufferDescriptor(1);
            }
            else if (inSecBuffers != null)
            {
                inSecurityBufferDescriptor = new Interop.Secur32.SecurityBufferDescriptor(inSecBuffers.Length);
            }

            Interop.Secur32.SecurityBufferDescriptor outSecurityBufferDescriptor = new Interop.Secur32.SecurityBufferDescriptor(1);

            // Actually, this is returned in outFlags.
            bool isSspiAllocated = (inFlags & Interop.Secur32.ContextFlags.AllocateMemory) != 0 ? true : false;

            int errorCode = -1;

            Interop.Secur32.SSPIHandle contextHandle = new Interop.Secur32.SSPIHandle();
            if (refContext != null)
            {
                contextHandle = refContext._handle;
            }

            // These are pinned user byte arrays passed along with SecurityBuffers.
            GCHandle[] pinnedInBytes  = null;
            GCHandle   pinnedOutBytes = new GCHandle();

            // Optional output buffer that may need to be freed.
            SafeFreeContextBuffer outFreeContextBuffer = null;
            try
            {
                pinnedOutBytes = GCHandle.Alloc(outSecBuffer.token, GCHandleType.Pinned);
                var inUnmanagedBuffer = new Interop.Secur32.SecurityBufferStruct[inSecurityBufferDescriptor == null ? 1 : inSecurityBufferDescriptor.Count];
                fixed(void *inUnmanagedBufferPtr = inUnmanagedBuffer)
                {
                    if (inSecurityBufferDescriptor != null)
                    {
                        // Fix Descriptor pointer that points to unmanaged SecurityBuffers.
                        inSecurityBufferDescriptor.UnmanagedPointer = inUnmanagedBufferPtr;
                        pinnedInBytes = new GCHandle[inSecurityBufferDescriptor.Count];
                        SecurityBuffer securityBuffer;
                        for (int index = 0; index < inSecurityBufferDescriptor.Count; ++index)
                        {
                            securityBuffer = inSecBuffer != null ? inSecBuffer : inSecBuffers[index];
                            if (securityBuffer != null)
                            {
                                // Copy the SecurityBuffer content into unmanaged place holder.
                                inUnmanagedBuffer[index].count = securityBuffer.size;
                                inUnmanagedBuffer[index].type  = securityBuffer.type;

                                // Use the unmanaged token if it's not null; otherwise use the managed buffer.
                                if (securityBuffer.unmanagedToken != null)
                                {
                                    inUnmanagedBuffer[index].token = securityBuffer.unmanagedToken.DangerousGetHandle();
                                }
                                else if (securityBuffer.token == null || securityBuffer.token.Length == 0)
                                {
                                    inUnmanagedBuffer[index].token = IntPtr.Zero;
                                }
                                else
                                {
                                    pinnedInBytes[index]           = GCHandle.Alloc(securityBuffer.token, GCHandleType.Pinned);
                                    inUnmanagedBuffer[index].token = Marshal.UnsafeAddrOfPinnedArrayElement(securityBuffer.token, securityBuffer.offset);
                                }
#if TRACE_VERBOSE
                                GlobalLog.Print("SecBuffer: cbBuffer:" + securityBuffer.size + " BufferType:" + securityBuffer.type);
#endif
                            }
                        }
                    }

                    var outUnmanagedBuffer = new Interop.Secur32.SecurityBufferStruct[1];
                    fixed(void *outUnmanagedBufferPtr = outUnmanagedBuffer)
                    {
                        // Fix Descriptor pointer that points to unmanaged SecurityBuffers.
                        outSecurityBufferDescriptor.UnmanagedPointer = outUnmanagedBufferPtr;
                        // Copy the SecurityBuffer content into unmanaged place holder.
                        outUnmanagedBuffer[0].count = outSecBuffer.size;
                        outUnmanagedBuffer[0].type  = outSecBuffer.type;

                        if (outSecBuffer.token == null || outSecBuffer.token.Length == 0)
                        {
                            outUnmanagedBuffer[0].token = IntPtr.Zero;
                        }
                        else
                        {
                            outUnmanagedBuffer[0].token = Marshal.UnsafeAddrOfPinnedArrayElement(outSecBuffer.token, outSecBuffer.offset);
                        }

                        if (isSspiAllocated)
                        {
                            outFreeContextBuffer = SafeFreeContextBuffer.CreateEmptyHandle();
                        }

                        if (refContext == null || refContext.IsInvalid)
                        {
                            refContext = new SafeDeleteContext_SECURITY();
                        }

                        errorCode = MustRunAcceptSecurityContext_SECURITY(
                            ref inCredentials,
                            contextHandle.IsZero ? null : &contextHandle,
                            inSecurityBufferDescriptor,
                            inFlags,
                            endianness,
                            refContext,
                            outSecurityBufferDescriptor,
                            ref outFlags,
                            outFreeContextBuffer);

                        GlobalLog.Print("SafeDeleteContext:AcceptSecurityContext  Marshalling OUT buffer");
                        // Get unmanaged buffer with index 0 as the only one passed into PInvoke.
                        outSecBuffer.size = outUnmanagedBuffer[0].count;
                        outSecBuffer.type = outUnmanagedBuffer[0].type;
                        if (outSecBuffer.size > 0)
                        {
                            outSecBuffer.token = new byte[outSecBuffer.size];
                            Marshal.Copy(outUnmanagedBuffer[0].token, outSecBuffer.token, 0, outSecBuffer.size);
                        }
                        else
                        {
                            outSecBuffer.token = null;
                        }
                    }
                }
            }
            finally
            {
                if (pinnedInBytes != null)
                {
                    for (int index = 0; index < pinnedInBytes.Length; index++)
                    {
                        if (pinnedInBytes[index].IsAllocated)
                        {
                            pinnedInBytes[index].Free();
                        }
                    }
                }

                if (pinnedOutBytes.IsAllocated)
                {
                    pinnedOutBytes.Free();
                }

                if (outFreeContextBuffer != null)
                {
                    outFreeContextBuffer.Dispose();
                }
            }

            GlobalLog.Leave("SafeDeleteContext::AcceptSecurityContex() unmanaged AcceptSecurityContex()", "errorCode:0x" + errorCode.ToString("x8") + " refContext:" + Logging.ObjectToString(refContext));

            return(errorCode);
        }
        internal unsafe static int CompleteAuthToken(
            ref SafeDeleteContext refContext,
            SecurityBuffer[] inSecBuffers)
        {
            GlobalLog.Enter("SafeDeleteContext::CompleteAuthToken");
            GlobalLog.Print("    refContext       = " + Logging.ObjectToString(refContext));
#if TRACE_VERBOSE
            GlobalLog.Print("    inSecBuffers[]   = length:" + inSecBuffers.Length);
#endif
            GlobalLog.Assert(inSecBuffers != null, "SafeDeleteContext::CompleteAuthToken()|inSecBuffers == null");
            var inSecurityBufferDescriptor = new Interop.Secur32.SecurityBufferDescriptor(inSecBuffers.Length);

            int errorCode = (int)Interop.SecurityStatus.InvalidHandle;

            // These are pinned user byte arrays passed along with SecurityBuffers.
            GCHandle[] pinnedInBytes = null;

            var inUnmanagedBuffer = new Interop.Secur32.SecurityBufferStruct[inSecurityBufferDescriptor.Count];
            fixed(void *inUnmanagedBufferPtr = inUnmanagedBuffer)
            {
                // Fix Descriptor pointer that points to unmanaged SecurityBuffers.
                inSecurityBufferDescriptor.UnmanagedPointer = inUnmanagedBufferPtr;
                pinnedInBytes = new GCHandle[inSecurityBufferDescriptor.Count];
                SecurityBuffer securityBuffer;

                for (int index = 0; index < inSecurityBufferDescriptor.Count; ++index)
                {
                    securityBuffer = inSecBuffers[index];
                    if (securityBuffer != null)
                    {
                        inUnmanagedBuffer[index].count = securityBuffer.size;
                        inUnmanagedBuffer[index].type  = securityBuffer.type;

                        // Use the unmanaged token if it's not null; otherwise use the managed buffer.
                        if (securityBuffer.unmanagedToken != null)
                        {
                            inUnmanagedBuffer[index].token = securityBuffer.unmanagedToken.DangerousGetHandle();
                        }
                        else if (securityBuffer.token == null || securityBuffer.token.Length == 0)
                        {
                            inUnmanagedBuffer[index].token = IntPtr.Zero;
                        }
                        else
                        {
                            pinnedInBytes[index]           = GCHandle.Alloc(securityBuffer.token, GCHandleType.Pinned);
                            inUnmanagedBuffer[index].token = Marshal.UnsafeAddrOfPinnedArrayElement(securityBuffer.token, securityBuffer.offset);
                        }
#if TRACE_VERBOSE
                        GlobalLog.Print("SecBuffer: cbBuffer:" + securityBuffer.size + " BufferType:" + securityBuffer.type);
#endif
                    }
                }

                Interop.Secur32.SSPIHandle contextHandle = new Interop.Secur32.SSPIHandle();
                if (refContext != null)
                {
                    contextHandle = refContext._handle;
                }
                try
                {
                    if (refContext == null || refContext.IsInvalid)
                    {
                        refContext = new SafeDeleteContext_SECURITY();
                    }

                    try
                    {
                        bool ignore = false;
                        refContext.DangerousAddRef(ref ignore);
                        errorCode = Interop.Secur32.CompleteAuthToken(contextHandle.IsZero ? null : &contextHandle, inSecurityBufferDescriptor);
                    }
                    finally
                    {
                        refContext.DangerousRelease();
                    }
                }
                finally
                {
                    if (pinnedInBytes != null)
                    {
                        for (int index = 0; index < pinnedInBytes.Length; index++)
                        {
                            if (pinnedInBytes[index].IsAllocated)
                            {
                                pinnedInBytes[index].Free();
                            }
                        }
                    }
                }
            }

            GlobalLog.Leave("SafeDeleteContext::CompleteAuthToken() unmanaged CompleteAuthToken()", "errorCode:0x" + errorCode.ToString("x8") + " refContext:" + Logging.ObjectToString(refContext));

            return(errorCode);
        }