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FreeRDP/libfreerdp/core/gateway/tsg.c

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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Terminal Server Gateway (TSG)
*
* Copyright 2012 Fujitsu Technology Solutions GmbH
* Copyright 2012 Dmitrij Jasnov <dmitrij.jasnov@ts.fujitsu.com>
* Copyright 2015 Thincast Technologies GmbH
* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <winpr/crt.h>
#include <winpr/ndr.h>
#include <winpr/error.h>
#include <winpr/print.h>
#include <winpr/stream.h>
#include <freerdp/log.h>
#include "rpc_bind.h"
#include "rpc_client.h"
#include "tsg.h"
#include "../../crypto/opensslcompat.h"
#define TAG FREERDP_TAG("core.gateway.tsg")
/**
* RPC Functions: http://msdn.microsoft.com/en-us/library/windows/desktop/aa378623/
* Remote Procedure Call: http://msdn.microsoft.com/en-us/library/windows/desktop/aa378651/
* RPC NDR Interface Reference: http://msdn.microsoft.com/en-us/library/windows/desktop/hh802752/
*/
/**
* call sequence with silent reauth:
*
* TsProxyCreateTunnelRequest()
* TsProxyCreateTunnelResponse(TunnelContext)
* TsProxyAuthorizeTunnelRequest(TunnelContext)
* TsProxyAuthorizeTunnelResponse()
* TsProxyMakeTunnelCallRequest(TunnelContext)
* TsProxyCreateChannelRequest(TunnelContext)
* TsProxyCreateChannelResponse(ChannelContext)
* TsProxySetupReceivePipeRequest(ChannelContext)
* TsProxySendToServerRequest(ChannelContext)
*
* ...
*
* TsProxyMakeTunnelCallResponse(reauth)
* TsProxyCreateTunnelRequest()
* TsProxyMakeTunnelCallRequest(TunnelContext)
* TsProxyCreateTunnelResponse(NewTunnelContext)
* TsProxyAuthorizeTunnelRequest(NewTunnelContext)
* TsProxyAuthorizeTunnelResponse()
* TsProxyCreateChannelRequest(NewTunnelContext)
* TsProxyCreateChannelResponse(NewChannelContext)
* TsProxyCloseChannelRequest(NewChannelContext)
* TsProxyCloseTunnelRequest(NewTunnelContext)
* TsProxyCloseChannelResponse(NullChannelContext)
* TsProxyCloseTunnelResponse(NullTunnelContext)
* TsProxySendToServerRequest(ChannelContext)
*/
DWORD TsProxySendToServer(handle_t IDL_handle, byte pRpcMessage[], UINT32 count, UINT32* lengths)
{
wStream* s;
int status;
rdpTsg* tsg;
BYTE* buffer;
UINT32 length;
byte* buffer1 = NULL;
byte* buffer2 = NULL;
byte* buffer3 = NULL;
UINT32 buffer1Length;
UINT32 buffer2Length;
UINT32 buffer3Length;
UINT32 numBuffers = 0;
UINT32 totalDataBytes = 0;
tsg = (rdpTsg*) IDL_handle;
buffer1Length = buffer2Length = buffer3Length = 0;
if (count > 0)
{
numBuffers++;
buffer1 = &pRpcMessage[0];
buffer1Length = lengths[0];
totalDataBytes += lengths[0] + 4;
}
if (count > 1)
{
numBuffers++;
buffer2 = &pRpcMessage[1];
buffer2Length = lengths[1];
totalDataBytes += lengths[1] + 4;
}
if (count > 2)
{
numBuffers++;
buffer3 = &pRpcMessage[2];
buffer3Length = lengths[2];
totalDataBytes += lengths[2] + 4;
}
length = 28 + totalDataBytes;
buffer = (BYTE*) calloc(1, length);
if (!buffer)
return -1;
s = Stream_New(buffer, length);
if (!s)
{
free(buffer);
WLog_ERR(TAG, "Stream_New failed!");
return -1;
}
/* PCHANNEL_CONTEXT_HANDLE_NOSERIALIZE_NR (20 bytes) */
Stream_Write(s, &tsg->ChannelContext.ContextType, 4); /* ContextType (4 bytes) */
Stream_Write(s, tsg->ChannelContext.ContextUuid, 16); /* ContextUuid (16 bytes) */
Stream_Write_UINT32_BE(s, totalDataBytes); /* totalDataBytes (4 bytes) */
Stream_Write_UINT32_BE(s, numBuffers); /* numBuffers (4 bytes) */
if (buffer1Length > 0)
Stream_Write_UINT32_BE(s, buffer1Length); /* buffer1Length (4 bytes) */
if (buffer2Length > 0)
Stream_Write_UINT32_BE(s, buffer2Length); /* buffer2Length (4 bytes) */
if (buffer3Length > 0)
Stream_Write_UINT32_BE(s, buffer3Length); /* buffer3Length (4 bytes) */
if (buffer1Length > 0)
Stream_Write(s, buffer1, buffer1Length); /* buffer1 (variable) */
if (buffer2Length > 0)
Stream_Write(s, buffer2, buffer2Length); /* buffer2 (variable) */
if (buffer3Length > 0)
Stream_Write(s, buffer3, buffer3Length); /* buffer3 (variable) */
Stream_SealLength(s);
status = rpc_client_write_call(tsg->rpc, Stream_Buffer(s), Stream_Length(s),
TsProxySendToServerOpnum);
Stream_Free(s, TRUE);
if (status <= 0)
{
WLog_ERR(TAG, "rpc_write failed!");
return -1;
}
return length;
}
/**
* OpNum = 1
*
* HRESULT TsProxyCreateTunnel(
* [in, ref] PTSG_PACKET tsgPacket,
* [out, ref] PTSG_PACKET* tsgPacketResponse,
* [out] PTUNNEL_CONTEXT_HANDLE_SERIALIZE* tunnelContext,
* [out] unsigned long* tunnelId
* );
*/
static BOOL TsProxyCreateTunnelWriteRequest(rdpTsg* tsg, PTSG_PACKET tsgPacket)
{
int status;
UINT32 length;
UINT32 offset = 0;
BYTE* buffer = NULL;
rdpRpc* rpc = tsg->rpc;
WLog_DBG(TAG, "TsProxyCreateTunnelWriteRequest");
if (tsgPacket->packetId == TSG_PACKET_TYPE_VERSIONCAPS)
{
PTSG_PACKET_VERSIONCAPS packetVersionCaps = tsgPacket->tsgPacket.packetVersionCaps;
PTSG_CAPABILITY_NAP tsgCapNap = &packetVersionCaps->tsgCaps->tsgPacket.tsgCapNap;
length = 108;
buffer = (BYTE*) malloc(length);
if (!buffer)
return FALSE;
*((UINT32*) &buffer[0]) = tsgPacket->packetId; /* PacketId (4 bytes) */
*((UINT32*) &buffer[4]) = tsgPacket->packetId; /* SwitchValue (4 bytes) */
*((UINT32*) &buffer[8]) = 0x00020000; /* PacketVersionCapsPtr (4 bytes) */
*((UINT16*) &buffer[12]) = packetVersionCaps->tsgHeader.ComponentId; /* ComponentId (2 bytes) */
*((UINT16*) &buffer[14]) = packetVersionCaps->tsgHeader.PacketId; /* PacketId (2 bytes) */
*((UINT32*) &buffer[16]) = 0x00020004; /* TsgCapsPtr (4 bytes) */
*((UINT32*) &buffer[20]) = packetVersionCaps->numCapabilities; /* NumCapabilities (4 bytes) */
*((UINT16*) &buffer[24]) = packetVersionCaps->majorVersion; /* MajorVersion (2 bytes) */
*((UINT16*) &buffer[26]) = packetVersionCaps->minorVersion; /* MinorVersion (2 bytes) */
*((UINT16*) &buffer[28]) =
packetVersionCaps->quarantineCapabilities; /* QuarantineCapabilities (2 bytes) */
/* 4-byte alignment (30 + 2) */
*((UINT16*) &buffer[30]) = 0x0000; /* pad (2 bytes) */
*((UINT32*) &buffer[32]) = packetVersionCaps->numCapabilities; /* MaxCount (4 bytes) */
*((UINT32*) &buffer[36]) =
packetVersionCaps->tsgCaps->capabilityType; /* CapabilityType (4 bytes) */
*((UINT32*) &buffer[40]) = packetVersionCaps->tsgCaps->capabilityType; /* SwitchValue (4 bytes) */
*((UINT32*) &buffer[44]) = tsgCapNap->capabilities; /* capabilities (4 bytes) */
offset = 48;
/**
* The following 60-byte structure is apparently undocumented,
* but parts of it can be matched to known C706 data structures.
*/
/*
* 8-byte constant (8A E3 13 71 02 F4 36 71) also observed here:
* http://lists.samba.org/archive/cifs-protocol/2010-July/001543.html
*/
buffer[offset + 0] = 0x8A;
buffer[offset + 1] = 0xE3;
buffer[offset + 2] = 0x13;
buffer[offset + 3] = 0x71;
buffer[offset + 4] = 0x02;
buffer[offset + 5] = 0xF4;
buffer[offset + 6] = 0x36;
buffer[offset + 7] = 0x71;
*((UINT32*) &buffer[offset + 8]) = 0x00040001; /* 1.4 (version?) */
*((UINT32*) &buffer[offset + 12]) = 0x00000001; /* 1 (element count?) */
/* p_cont_list_t */
buffer[offset + 16] = 2; /* ncontext_elem */
buffer[offset + 17] = 0x40; /* reserved1 */
*((UINT16*) &buffer[offset + 18]) = 0x0028; /* reserved2 */
/* p_syntax_id_t */
CopyMemory(&buffer[offset + 20], &TSGU_UUID, sizeof(p_uuid_t));
*((UINT32*) &buffer[offset + 36]) = TSGU_SYNTAX_IF_VERSION;
/* p_syntax_id_t */
CopyMemory(&buffer[offset + 40], &NDR_UUID, sizeof(p_uuid_t));
*((UINT32*) &buffer[offset + 56]) = NDR_SYNTAX_IF_VERSION;
status = rpc_client_write_call(rpc, buffer, length, TsProxyCreateTunnelOpnum);
free(buffer);
if (status <= 0)
return FALSE;
}
else if (tsgPacket->packetId == TSG_PACKET_TYPE_REAUTH)
{
PTSG_PACKET_REAUTH packetReauth = tsgPacket->tsgPacket.packetReauth;
PTSG_PACKET_VERSIONCAPS packetVersionCaps = packetReauth->tsgInitialPacket.packetVersionCaps;
PTSG_CAPABILITY_NAP tsgCapNap = &packetVersionCaps->tsgCaps->tsgPacket.tsgCapNap;
length = 72;
buffer = (BYTE*) malloc(length);
if (!buffer)
return FALSE;
*((UINT32*) &buffer[0]) = tsgPacket->packetId; /* PacketId (4 bytes) */
*((UINT32*) &buffer[4]) = tsgPacket->packetId; /* SwitchValue (4 bytes) */
*((UINT32*) &buffer[8]) = 0x00020000; /* PacketReauthPtr (4 bytes) */
*((UINT32*) &buffer[12]) = 0; /* ??? (4 bytes) */
*((UINT64*) &buffer[16]) = packetReauth->tunnelContext; /* TunnelContext (8 bytes) */
offset = 24;
*((UINT32*) &buffer[offset + 0]) = TSG_PACKET_TYPE_VERSIONCAPS; /* PacketId (4 bytes) */
*((UINT32*) &buffer[offset + 4]) = TSG_PACKET_TYPE_VERSIONCAPS; /* SwitchValue (4 bytes) */
*((UINT32*) &buffer[offset + 8]) = 0x00020004; /* PacketVersionCapsPtr (4 bytes) */
*((UINT16*) &buffer[offset + 12]) =
packetVersionCaps->tsgHeader.ComponentId; /* ComponentId (2 bytes) */
*((UINT16*) &buffer[offset + 14]) = packetVersionCaps->tsgHeader.PacketId; /* PacketId (2 bytes) */
*((UINT32*) &buffer[offset + 16]) = 0x00020008; /* TsgCapsPtr (4 bytes) */
*((UINT32*) &buffer[offset + 20]) =
packetVersionCaps->numCapabilities; /* NumCapabilities (4 bytes) */
*((UINT16*) &buffer[offset + 24]) = packetVersionCaps->majorVersion; /* MajorVersion (2 bytes) */
*((UINT16*) &buffer[offset + 26]) = packetVersionCaps->minorVersion; /* MinorVersion (2 bytes) */
*((UINT16*) &buffer[offset + 28]) =
packetVersionCaps->quarantineCapabilities; /* QuarantineCapabilities (2 bytes) */
/* 4-byte alignment (30 + 2) */
*((UINT16*) &buffer[offset + 30]) = 0x0000; /* pad (2 bytes) */
*((UINT32*) &buffer[offset + 32]) = packetVersionCaps->numCapabilities; /* MaxCount (4 bytes) */
*((UINT32*) &buffer[offset + 36]) =
packetVersionCaps->tsgCaps->capabilityType; /* CapabilityType (4 bytes) */
*((UINT32*) &buffer[offset + 40]) =
packetVersionCaps->tsgCaps->capabilityType; /* SwitchValue (4 bytes) */
*((UINT32*) &buffer[offset + 44]) = tsgCapNap->capabilities; /* capabilities (4 bytes) */
status = rpc_client_write_call(rpc, buffer, length, TsProxyCreateTunnelOpnum);
free(buffer);
if (status <= 0)
return FALSE;
}
return TRUE;
}
static BOOL TsProxyCreateTunnelReadResponse(rdpTsg* tsg, RPC_PDU* pdu,
CONTEXT_HANDLE* tunnelContext,
UINT32* tunnelId)
{
BYTE* buffer;
UINT32 count;
UINT32 length;
UINT32 offset;
UINT32 Pointer;
PTSG_PACKET packet;
UINT32 SwitchValue;
UINT32 MessageSwitchValue = 0;
UINT32 IsMessagePresent;
UINT32 MsgBytes;
PTSG_PACKET_CAPABILITIES tsgCaps;
PTSG_PACKET_VERSIONCAPS versionCaps;
PTSG_PACKET_CAPS_RESPONSE packetCapsResponse;
PTSG_PACKET_QUARENC_RESPONSE packetQuarEncResponse;
WLog_DBG(TAG, "TsProxyCreateTunnelReadResponse");
if (!pdu)
return FALSE;
length = Stream_Length(pdu->s);
buffer = Stream_Buffer(pdu->s);
if (!(pdu->Flags & RPC_PDU_FLAG_STUB))
buffer = &buffer[24];
packet = (PTSG_PACKET) calloc(1, sizeof(TSG_PACKET));
if (!packet)
return FALSE;
offset = 4; /* PacketPtr (4 bytes) */
packet->packetId = *((UINT32*) &buffer[offset]); /* PacketId (4 bytes) */
SwitchValue = *((UINT32*) &buffer[offset + 4]); /* SwitchValue (4 bytes) */
if ((packet->packetId == TSG_PACKET_TYPE_CAPS_RESPONSE) &&
(SwitchValue == TSG_PACKET_TYPE_CAPS_RESPONSE))
{
packetCapsResponse = (PTSG_PACKET_CAPS_RESPONSE) calloc(1, sizeof(TSG_PACKET_CAPS_RESPONSE));
if (!packetCapsResponse)
{
free(packet);
return FALSE;
}
packet->tsgPacket.packetCapsResponse = packetCapsResponse;
/* PacketQuarResponsePtr (4 bytes) */
packetCapsResponse->pktQuarEncResponse.flags = *((UINT32*) &buffer[offset +
12]); /* Flags (4 bytes) */
packetCapsResponse->pktQuarEncResponse.certChainLen = *((UINT32*) &buffer[offset +
16]); /* CertChainLength (4 bytes) */
/* CertChainDataPtr (4 bytes) */
CopyMemory(&packetCapsResponse->pktQuarEncResponse.nonce, &buffer[offset + 24],
16); /* Nonce (16 bytes) */
offset += 40;
Pointer = *((UINT32*) &buffer[offset]); /* VersionCapsPtr (4 bytes) */
offset += 4;
if ((Pointer == 0x0002000C) || (Pointer == 0x00020008))
{
offset += 4; /* MsgId (4 bytes) */
offset += 4; /* MsgType (4 bytes) */
IsMessagePresent = *((UINT32*) &buffer[offset]); /* IsMessagePresent (4 bytes) */
offset += 4;
MessageSwitchValue = *((UINT32*) &buffer[offset]); /* MessageSwitchValue (4 bytes) */
offset += 4;
}
if (packetCapsResponse->pktQuarEncResponse.certChainLen > 0)
{
Pointer = *((UINT32*) &buffer[offset]); /* MsgPtr (4 bytes): 0x00020014 */
offset += 4;
offset += 4; /* MaxCount (4 bytes) */
offset += 4; /* Offset (4 bytes) */
count = *((UINT32*) &buffer[offset]); /* ActualCount (4 bytes) */
offset += 4;
/*
* CertChainData is a wide character string, and the count is
* given in characters excluding the null terminator, therefore:
* size = (count * 2)
*/
offset += (count * 2); /* CertChainData */
/* 4-byte alignment */
rpc_offset_align(&offset, 4);
}
else
{
Pointer = *((UINT32*) &buffer[offset]); /* Ptr (4 bytes) */
offset += 4;
}
versionCaps = (PTSG_PACKET_VERSIONCAPS) calloc(1, sizeof(TSG_PACKET_VERSIONCAPS));
if (!versionCaps)
{
free(packetCapsResponse);
free(packet);
return FALSE;
}
packetCapsResponse->pktQuarEncResponse.versionCaps = versionCaps;
versionCaps->tsgHeader.ComponentId = *((UINT16*) &buffer[offset]); /* ComponentId (2 bytes) */
versionCaps->tsgHeader.PacketId = *((UINT16*) &buffer[offset + 2]); /* PacketId (2 bytes) */
offset += 4;
if (versionCaps->tsgHeader.ComponentId != TS_GATEWAY_TRANSPORT)
{
WLog_ERR(TAG, "Unexpected ComponentId: 0x%04"PRIX16", Expected TS_GATEWAY_TRANSPORT",
versionCaps->tsgHeader.ComponentId);
free(packetCapsResponse);
free(versionCaps);
free(packet);
return FALSE;
}
Pointer = *((UINT32*) &buffer[offset]); /* TsgCapsPtr (4 bytes) */
versionCaps->numCapabilities = *((UINT32*) &buffer[offset + 4]); /* NumCapabilities (4 bytes) */
versionCaps->majorVersion = *((UINT16*) &buffer[offset + 8]); /* MajorVersion (2 bytes) */
versionCaps->minorVersion = *((UINT16*) &buffer[offset + 10]); /* MinorVersion (2 bytes) */
versionCaps->quarantineCapabilities = *((UINT16*) &buffer[offset +
12]); /* QuarantineCapabilities (2 bytes) */
offset += 14;
/* 4-byte alignment */
rpc_offset_align(&offset, 4);
tsgCaps = (PTSG_PACKET_CAPABILITIES) calloc(1, sizeof(TSG_PACKET_CAPABILITIES));
if (!tsgCaps)
{
free(packetCapsResponse);
free(versionCaps);
free(packet);
return FALSE;
}
versionCaps->tsgCaps = tsgCaps;
offset += 4; /* MaxCount (4 bytes) */
tsgCaps->capabilityType = *((UINT32*) &buffer[offset]); /* CapabilityType (4 bytes) */
SwitchValue = *((UINT32*) &buffer[offset + 4]); /* SwitchValue (4 bytes) */
offset += 8;
if ((SwitchValue != TSG_CAPABILITY_TYPE_NAP) ||
(tsgCaps->capabilityType != TSG_CAPABILITY_TYPE_NAP))
{
WLog_ERR(TAG, "Unexpected CapabilityType: 0x%08"PRIX32", Expected TSG_CAPABILITY_TYPE_NAP",
tsgCaps->capabilityType);
free(tsgCaps);
free(versionCaps);
free(packetCapsResponse);
free(packet);
return FALSE;
}
tsgCaps->tsgPacket.tsgCapNap.capabilities = *((UINT32*)
&buffer[offset]); /* Capabilities (4 bytes) */
offset += 4;
switch (MessageSwitchValue)
{
case TSG_ASYNC_MESSAGE_CONSENT_MESSAGE:
case TSG_ASYNC_MESSAGE_SERVICE_MESSAGE:
offset += 4; /* IsDisplayMandatory (4 bytes) */
offset += 4; /* IsConsent Mandatory (4 bytes) */
MsgBytes = *((UINT32*) &buffer[offset]);
offset += 4;
Pointer = *((UINT32*) &buffer[offset]);
offset += 4;
if (Pointer)
{
offset += 4; /* MaxCount (4 bytes) */
offset += 4; /* Offset (4 bytes) */
offset += 4; /* Length (4 bytes) */
}
if (MsgBytes > TSG_MESSAGING_MAX_MESSAGE_LENGTH)
{
WLog_ERR(TAG, "Out of Spec Message Length %"PRIu32"", MsgBytes);
free(tsgCaps);
free(versionCaps);
free(packetCapsResponse);
free(packet);
return FALSE;
}
offset += MsgBytes;
break;
case TSG_ASYNC_MESSAGE_REAUTH:
rpc_offset_align(&offset, 8);
offset += 8; /* TunnelContext (8 bytes) */
break;
default:
WLog_ERR(TAG, "Unexpected Message Type: 0x%"PRIX32"", MessageSwitchValue);
free(tsgCaps);
free(versionCaps);
free(packetCapsResponse);
free(packet);
return FALSE;
}
rpc_offset_align(&offset, 4);
/* TunnelContext (20 bytes) */
CopyMemory(&tunnelContext->ContextType, &buffer[offset], 4); /* ContextType (4 bytes) */
CopyMemory(&tunnelContext->ContextUuid, &buffer[offset + 4], 16); /* ContextUuid (16 bytes) */
offset += 20;
*tunnelId = *((UINT32*) &buffer[offset]); /* TunnelId (4 bytes) */
/* ReturnValue (4 bytes) */
free(tsgCaps);
free(versionCaps);
free(packetCapsResponse);
}
else if ((packet->packetId == TSG_PACKET_TYPE_QUARENC_RESPONSE) &&
(SwitchValue == TSG_PACKET_TYPE_QUARENC_RESPONSE))
{
packetQuarEncResponse = (PTSG_PACKET_QUARENC_RESPONSE) calloc(1,
sizeof(TSG_PACKET_QUARENC_RESPONSE));
if (!packetQuarEncResponse)
{
free(packet);
return FALSE;
}
packet->tsgPacket.packetQuarEncResponse = packetQuarEncResponse;
/* PacketQuarResponsePtr (4 bytes) */
packetQuarEncResponse->flags = *((UINT32*) &buffer[offset + 12]); /* Flags (4 bytes) */
packetQuarEncResponse->certChainLen = *((UINT32*) &buffer[offset +
16]); /* CertChainLength (4 bytes) */
/* CertChainDataPtr (4 bytes) */
CopyMemory(&packetQuarEncResponse->nonce, &buffer[offset + 24], 16); /* Nonce (16 bytes) */
offset += 40;
if (packetQuarEncResponse->certChainLen > 0)
{
Pointer = *((UINT32*) &buffer[offset]); /* Ptr (4 bytes): 0x0002000C */
offset += 4;
offset += 4; /* MaxCount (4 bytes) */
offset += 4; /* Offset (4 bytes) */
count = *((UINT32*) &buffer[offset]); /* ActualCount (4 bytes) */
offset += 4;
/*
* CertChainData is a wide character string, and the count is
* given in characters excluding the null terminator, therefore:
* size = (count * 2)
*/
offset += (count * 2); /* CertChainData */
/* 4-byte alignment */
rpc_offset_align(&offset, 4);
}
else
{
Pointer = *((UINT32*) &buffer[offset]); /* Ptr (4 bytes): 0x00020008 */
offset += 4;
}
versionCaps = (PTSG_PACKET_VERSIONCAPS) calloc(1, sizeof(TSG_PACKET_VERSIONCAPS));
if (!versionCaps)
{
free(packetQuarEncResponse);
free(packet);
return FALSE;
}
packetQuarEncResponse->versionCaps = versionCaps;
versionCaps->tsgHeader.ComponentId = *((UINT16*) &buffer[offset]); /* ComponentId (2 bytes) */
versionCaps->tsgHeader.PacketId = *((UINT16*) &buffer[offset + 2]); /* PacketId (2 bytes) */
offset += 4;
if (versionCaps->tsgHeader.ComponentId != TS_GATEWAY_TRANSPORT)
{
WLog_ERR(TAG, "Unexpected ComponentId: 0x%04"PRIX16", Expected TS_GATEWAY_TRANSPORT",
versionCaps->tsgHeader.ComponentId);
free(versionCaps);
free(packetQuarEncResponse);
free(packet);
return FALSE;
}
Pointer = *((UINT32*) &buffer[offset]); /* TsgCapsPtr (4 bytes) */
versionCaps->numCapabilities = *((UINT32*) &buffer[offset + 4]); /* NumCapabilities (4 bytes) */
versionCaps->majorVersion = *((UINT16*) &buffer[offset + 8]); /* MajorVersion (2 bytes) */
versionCaps->majorVersion = *((UINT16*) &buffer[offset + 10]); /* MinorVersion (2 bytes) */
versionCaps->quarantineCapabilities = *((UINT16*) &buffer[offset +
12]); /* QuarantineCapabilities (2 bytes) */
offset += 14;
/* 4-byte alignment */
rpc_offset_align(&offset, 4);
/* Not sure exactly what this is */
offset += 4; /* 0x00000001 (4 bytes) */
offset += 4; /* 0x00000001 (4 bytes) */
offset += 4; /* 0x00000001 (4 bytes) */
offset += 4; /* 0x00000002 (4 bytes) */
/* TunnelContext (20 bytes) */
CopyMemory(&tunnelContext->ContextType, &buffer[offset], 4); /* ContextType (4 bytes) */
CopyMemory(&tunnelContext->ContextUuid, &buffer[offset + 4], 16); /* ContextUuid (16 bytes) */
offset += 20;
free(versionCaps);
free(packetQuarEncResponse);
}
else
{
WLog_ERR(TAG, "Unexpected PacketId: 0x%08"PRIX32", Expected TSG_PACKET_TYPE_CAPS_RESPONSE "
"or TSG_PACKET_TYPE_QUARENC_RESPONSE", packet->packetId);
free(packet);
return FALSE;
}
free(packet);
return TRUE;
}
/**
* OpNum = 2
*
* HRESULT TsProxyAuthorizeTunnel(
* [in] PTUNNEL_CONTEXT_HANDLE_NOSERIALIZE tunnelContext,
* [in, ref] PTSG_PACKET tsgPacket,
* [out, ref] PTSG_PACKET* tsgPacketResponse
* );
*
*/
static BOOL TsProxyAuthorizeTunnelWriteRequest(rdpTsg* tsg, CONTEXT_HANDLE* tunnelContext)
{
UINT32 pad;
int status;
BYTE* buffer;
UINT32 count;
UINT32 length;
UINT32 offset;
rdpRpc* rpc = tsg->rpc;
WLog_DBG(TAG, "TsProxyAuthorizeTunnelWriteRequest");
count = _wcslen(tsg->MachineName) + 1;
offset = 64 + (count * 2);
rpc_offset_align(&offset, 4);
offset += 4;
length = offset;
buffer = (BYTE*) malloc(length);
if (!buffer)
return FALSE;
/* TunnelContext (20 bytes) */
CopyMemory(&buffer[0], &tunnelContext->ContextType, 4); /* ContextType (4 bytes) */
CopyMemory(&buffer[4], &tunnelContext->ContextUuid, 16); /* ContextUuid (16 bytes) */
/* 4-byte alignment */
*((UINT32*) &buffer[20]) = TSG_PACKET_TYPE_QUARREQUEST; /* PacketId (4 bytes) */
*((UINT32*) &buffer[24]) = TSG_PACKET_TYPE_QUARREQUEST; /* SwitchValue (4 bytes) */
*((UINT32*) &buffer[28]) = 0x00020000; /* PacketQuarRequestPtr (4 bytes) */
*((UINT32*) &buffer[32]) = 0x00000000; /* Flags (4 bytes) */
*((UINT32*) &buffer[36]) = 0x00020004; /* MachineNamePtr (4 bytes) */
*((UINT32*) &buffer[40]) = count; /* NameLength (4 bytes) */
*((UINT32*) &buffer[44]) = 0x00020008; /* DataPtr (4 bytes) */
*((UINT32*) &buffer[48]) = 0; /* DataLength (4 bytes) */
/* MachineName */
*((UINT32*) &buffer[52]) = count; /* MaxCount (4 bytes) */
*((UINT32*) &buffer[56]) = 0; /* Offset (4 bytes) */
*((UINT32*) &buffer[60]) = count; /* ActualCount (4 bytes) */
CopyMemory(&buffer[64], tsg->MachineName, count * 2); /* Array */
offset = 64 + (count * 2);
/* 4-byte alignment */
pad = rpc_offset_align(&offset, 4);
ZeroMemory(&buffer[offset - pad], pad);
*((UINT32*) &buffer[offset]) = 0x00000000; /* MaxCount (4 bytes) */
offset += 4;
status = rpc_client_write_call(rpc, buffer, length, TsProxyAuthorizeTunnelOpnum);
free(buffer);
if (status <= 0)
return FALSE;
return TRUE;
}
static BOOL TsProxyAuthorizeTunnelReadResponse(rdpTsg* tsg, RPC_PDU* pdu)
{
BYTE* buffer;
UINT32 length;
UINT32 offset;
UINT32 Pointer;
UINT32 SizeValue;
UINT32 SwitchValue;
UINT32 idleTimeout;
PTSG_PACKET packet;
PTSG_PACKET_RESPONSE packetResponse;
WLog_DBG(TAG, "TsProxyAuthorizeTunnelReadResponse");
if (!pdu)
return FALSE;
length = Stream_Length(pdu->s);
buffer = Stream_Buffer(pdu->s);
if (!(pdu->Flags & RPC_PDU_FLAG_STUB))
buffer = &buffer[24];
packet = (PTSG_PACKET) calloc(1, sizeof(TSG_PACKET));
if (!packet)
return FALSE;
offset = 4; /* PacketPtr (4 bytes) */
packet->packetId = *((UINT32*) &buffer[offset]); /* PacketId (4 bytes) */
SwitchValue = *((UINT32*) &buffer[offset + 4]); /* SwitchValue (4 bytes) */
if (packet->packetId == E_PROXY_NAP_ACCESSDENIED)
{
WLog_ERR(TAG, "status: E_PROXY_NAP_ACCESSDENIED (0x%08X)", E_PROXY_NAP_ACCESSDENIED);
WLog_ERR(TAG, "Ensure that the Gateway Connection Authorization Policy is correct");
free(packet);
return FALSE;
}
if ((packet->packetId != TSG_PACKET_TYPE_RESPONSE) || (SwitchValue != TSG_PACKET_TYPE_RESPONSE))
{
WLog_ERR(TAG, "Unexpected PacketId: 0x%08"PRIX32", Expected TSG_PACKET_TYPE_RESPONSE",
packet->packetId);
free(packet);
return FALSE;
}
packetResponse = (PTSG_PACKET_RESPONSE) calloc(1, sizeof(TSG_PACKET_RESPONSE));
if (!packetResponse)
{
free(packet);
return FALSE;
}
packet->tsgPacket.packetResponse = packetResponse;
Pointer = *((UINT32*) &buffer[offset + 8]); /* PacketResponsePtr (4 bytes) */
packetResponse->flags = *((UINT32*) &buffer[offset + 12]); /* Flags (4 bytes) */
if (packetResponse->flags != TSG_PACKET_TYPE_QUARREQUEST)
{
WLog_ERR(TAG,
"Unexpected Packet Response Flags: 0x%08"PRIX32", Expected TSG_PACKET_TYPE_QUARREQUEST",
packetResponse->flags);
free(packet);
free(packetResponse);
return FALSE;
}
/* Reserved (4 bytes) */
Pointer = *((UINT32*) &buffer[offset + 20]); /* ResponseDataPtr (4 bytes) */
packetResponse->responseDataLen = *((UINT32*) &buffer[offset +
24]); /* ResponseDataLength (4 bytes) */
packetResponse->redirectionFlags.enableAllRedirections = *((UINT32*) &buffer[offset +
28]); /* EnableAllRedirections (4 bytes) */
packetResponse->redirectionFlags.disableAllRedirections = *((UINT32*) &buffer[offset +
32]); /* DisableAllRedirections (4 bytes) */
packetResponse->redirectionFlags.driveRedirectionDisabled = *((UINT32*) &buffer[offset +
36]); /* DriveRedirectionDisabled (4 bytes) */
packetResponse->redirectionFlags.printerRedirectionDisabled = *((UINT32*) &buffer[offset +
40]); /* PrinterRedirectionDisabled (4 bytes) */
packetResponse->redirectionFlags.portRedirectionDisabled = *((UINT32*) &buffer[offset +
44]); /* PortRedirectionDisabled (4 bytes) */
packetResponse->redirectionFlags.reserved = *((UINT32*) &buffer[offset +
48]); /* Reserved (4 bytes) */
packetResponse->redirectionFlags.clipboardRedirectionDisabled = *((UINT32*) &buffer[offset +
52]); /* ClipboardRedirectionDisabled (4 bytes) */
packetResponse->redirectionFlags.pnpRedirectionDisabled = *((UINT32*) &buffer[offset +
56]); /* PnpRedirectionDisabled (4 bytes) */
offset += 60;
SizeValue = *((UINT32*) &buffer[offset]); /* (4 bytes) */
offset += 4;
if (SizeValue != packetResponse->responseDataLen)
{
WLog_ERR(TAG, "Unexpected size value: %"PRIu32", expected: %"PRIu32"",
SizeValue, packetResponse->responseDataLen);
free(packetResponse);
free(packet);
return FALSE;
}
if (SizeValue == 4)
{
idleTimeout = *((UINT32*) &buffer[offset]);
offset += 4;
}
else
{
offset += SizeValue; /* ResponseData */
}
free(packetResponse);
free(packet);
return TRUE;
}
/**
* OpNum = 3
*
* HRESULT TsProxyMakeTunnelCall(
* [in] PTUNNEL_CONTEXT_HANDLE_NOSERIALIZE tunnelContext,
* [in] unsigned long procId,
* [in, ref] PTSG_PACKET tsgPacket,
* [out, ref] PTSG_PACKET* tsgPacketResponse
* );
*/
static BOOL TsProxyMakeTunnelCallWriteRequest(rdpTsg* tsg, CONTEXT_HANDLE* tunnelContext,
UINT32 procId)
{
int status;
BYTE* buffer;
UINT32 length;
rdpRpc* rpc = tsg->rpc;
WLog_DBG(TAG, "TsProxyMakeTunnelCallWriteRequest");
length = 40;
buffer = (BYTE*) malloc(length);
if (!buffer)
return FALSE;
/* TunnelContext (20 bytes) */
CopyMemory(&buffer[0], &tunnelContext->ContextType, 4); /* ContextType (4 bytes) */
CopyMemory(&buffer[4], &tunnelContext->ContextUuid, 16); /* ContextUuid (16 bytes) */
*((UINT32*) &buffer[20]) = procId; /* ProcId (4 bytes) */
/* 4-byte alignment */
*((UINT32*) &buffer[24]) = TSG_PACKET_TYPE_MSGREQUEST_PACKET; /* PacketId (4 bytes) */
*((UINT32*) &buffer[28]) = TSG_PACKET_TYPE_MSGREQUEST_PACKET; /* SwitchValue (4 bytes) */
*((UINT32*) &buffer[32]) = 0x00020000; /* PacketMsgRequestPtr (4 bytes) */
*((UINT32*) &buffer[36]) = 0x00000001; /* MaxMessagesPerBatch (4 bytes) */
status = rpc_client_write_call(rpc, buffer, length, TsProxyMakeTunnelCallOpnum);
free(buffer);
if (status <= 0)
return FALSE;
return TRUE;
}
static BOOL TsProxyMakeTunnelCallReadResponse(rdpTsg* tsg, RPC_PDU* pdu)
{
BYTE* buffer;
UINT32 length;
UINT32 offset;
UINT32 Pointer;
UINT32 MaxCount;
UINT32 ActualCount;
UINT32 SwitchValue;
PTSG_PACKET packet;
BOOL status = TRUE;
char* messageText = NULL;
PTSG_PACKET_MSG_RESPONSE packetMsgResponse = NULL;
PTSG_PACKET_STRING_MESSAGE packetStringMessage = NULL;
PTSG_PACKET_REAUTH_MESSAGE packetReauthMessage = NULL;
WLog_DBG(TAG, "TsProxyMakeTunnelCallReadResponse");
/* This is an asynchronous response */
if (!pdu)
return FALSE;
length = Stream_Length(pdu->s);
buffer = Stream_Buffer(pdu->s);
if (!(pdu->Flags & RPC_PDU_FLAG_STUB))
buffer = &buffer[24];
packet = (PTSG_PACKET) calloc(1, sizeof(TSG_PACKET));
if (!packet)
return FALSE;
offset = 4; /* PacketPtr (4 bytes) */
packet->packetId = *((UINT32*) &buffer[offset]); /* PacketId (4 bytes) */
SwitchValue = *((UINT32*) &buffer[offset + 4]); /* SwitchValue (4 bytes) */
if ((packet->packetId != TSG_PACKET_TYPE_MESSAGE_PACKET) ||
(SwitchValue != TSG_PACKET_TYPE_MESSAGE_PACKET))
{
WLog_ERR(TAG, "Unexpected PacketId: 0x%08"PRIX32", Expected TSG_PACKET_TYPE_MESSAGE_PACKET",
packet->packetId);
free(packet);
return FALSE;
}
packetMsgResponse = (PTSG_PACKET_MSG_RESPONSE) calloc(1, sizeof(TSG_PACKET_MSG_RESPONSE));
if (!packetMsgResponse)
{
free(packet);
return FALSE;
}
packet->tsgPacket.packetMsgResponse = packetMsgResponse;
Pointer = *((UINT32*) &buffer[offset + 8]); /* PacketMsgResponsePtr (4 bytes) */
packetMsgResponse->msgID = *((UINT32*) &buffer[offset + 12]); /* MsgId (4 bytes) */
packetMsgResponse->msgType = *((UINT32*) &buffer[offset + 16]); /* MsgType (4 bytes) */
packetMsgResponse->isMsgPresent = *((INT32*) &buffer[offset + 20]); /* IsMsgPresent (4 bytes) */
SwitchValue = *((UINT32*) &buffer[offset + 24]); /* SwitchValue (4 bytes) */
switch (SwitchValue)
{
case TSG_ASYNC_MESSAGE_CONSENT_MESSAGE:
packetStringMessage = (PTSG_PACKET_STRING_MESSAGE) calloc(1, sizeof(TSG_PACKET_STRING_MESSAGE));
if (!packetStringMessage)
{
status = FALSE;
goto out;
}
packetMsgResponse->messagePacket.consentMessage = packetStringMessage;
Pointer = *((UINT32*) &buffer[offset + 28]); /* ConsentMessagePtr (4 bytes) */
packetStringMessage->isDisplayMandatory = *((INT32*) &buffer[offset +
32]); /* IsDisplayMandatory (4 bytes) */
packetStringMessage->isConsentMandatory = *((INT32*) &buffer[offset +
36]); /* IsConsentMandatory (4 bytes) */
packetStringMessage->msgBytes = *((UINT32*) &buffer[offset + 40]); /* MsgBytes (4 bytes) */
Pointer = *((UINT32*) &buffer[offset + 44]); /* MsgPtr (4 bytes) */
MaxCount = *((UINT32*) &buffer[offset + 48]); /* MaxCount (4 bytes) */
/* Offset (4 bytes) */
ActualCount = *((UINT32*) &buffer[offset + 56]); /* ActualCount (4 bytes) */
ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) &buffer[offset + 60], ActualCount, &messageText, 0, NULL,
NULL);
WLog_INFO(TAG, "Consent Message: %s", messageText);
free(messageText);
break;
case TSG_ASYNC_MESSAGE_SERVICE_MESSAGE:
packetStringMessage = (PTSG_PACKET_STRING_MESSAGE) calloc(1, sizeof(TSG_PACKET_STRING_MESSAGE));
if (!packetStringMessage)
{
status = FALSE;
goto out;
}
packetMsgResponse->messagePacket.serviceMessage = packetStringMessage;
Pointer = *((UINT32*) &buffer[offset + 28]); /* ServiceMessagePtr (4 bytes) */
packetStringMessage->isDisplayMandatory = *((INT32*) &buffer[offset +
32]); /* IsDisplayMandatory (4 bytes) */
packetStringMessage->isConsentMandatory = *((INT32*) &buffer[offset +
36]); /* IsConsentMandatory (4 bytes) */
packetStringMessage->msgBytes = *((UINT32*) &buffer[offset + 40]); /* MsgBytes (4 bytes) */
Pointer = *((UINT32*) &buffer[offset + 44]); /* MsgPtr (4 bytes) */
MaxCount = *((UINT32*) &buffer[offset + 48]); /* MaxCount (4 bytes) */
/* Offset (4 bytes) */
ActualCount = *((UINT32*) &buffer[offset + 56]); /* ActualCount (4 bytes) */
ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) &buffer[offset + 60], ActualCount, &messageText, 0, NULL,
NULL);
WLog_INFO(TAG, "Service Message: %s", messageText);
free(messageText);
break;
case TSG_ASYNC_MESSAGE_REAUTH:
packetReauthMessage = (PTSG_PACKET_REAUTH_MESSAGE) calloc(1, sizeof(TSG_PACKET_REAUTH_MESSAGE));
if (!packetReauthMessage)
{
status = FALSE;
goto out;
}
packetMsgResponse->messagePacket.reauthMessage = packetReauthMessage;
Pointer = *((UINT32*) &buffer[offset + 28]); /* ReauthMessagePtr (4 bytes) */
/* alignment pad (4 bytes) */
packetReauthMessage->tunnelContext = *((UINT64*) &buffer[offset +
36]); /* TunnelContext (8 bytes) */
/* ReturnValue (4 bytes) */
tsg->ReauthTunnelContext = packetReauthMessage->tunnelContext;
break;
default:
WLog_ERR(TAG, "unexpected message type: %"PRIu32"", SwitchValue);
status = FALSE;
break;
}
out:
if (packet)
{
if (packet->tsgPacket.packetMsgResponse)
{
free(packet->tsgPacket.packetMsgResponse->messagePacket.reauthMessage);
free(packet->tsgPacket.packetMsgResponse);
}
free(packet);
}
return status;
}
/**
* OpNum = 4
*
* HRESULT TsProxyCreateChannel(
* [in] PTUNNEL_CONTEXT_HANDLE_NOSERIALIZE tunnelContext,
* [in, ref] PTSENDPOINTINFO tsEndPointInfo,
* [out] PCHANNEL_CONTEXT_HANDLE_SERIALIZE* channelContext,
* [out] unsigned long* channelId
* );
*/
static BOOL TsProxyCreateChannelWriteRequest(rdpTsg* tsg, CONTEXT_HANDLE* tunnelContext)
{
int status;
UINT32 count;
BYTE* buffer;
UINT32 length;
rdpRpc* rpc = tsg->rpc;
count = _wcslen(tsg->Hostname) + 1;
WLog_DBG(TAG, "TsProxyCreateChannelWriteRequest");
length = 60 + (count * 2);
buffer = (BYTE*) malloc(length);
if (!buffer)
return FALSE;
/* TunnelContext (20 bytes) */
CopyMemory(&buffer[0], &tunnelContext->ContextType, 4); /* ContextType (4 bytes) */
CopyMemory(&buffer[4], &tunnelContext->ContextUuid, 16); /* ContextUuid (16 bytes) */
/* TSENDPOINTINFO */
*((UINT32*) &buffer[20]) = 0x00020000; /* ResourceNamePtr (4 bytes) */
*((UINT32*) &buffer[24]) = 0x00000001; /* NumResourceNames (4 bytes) */
*((UINT32*) &buffer[28]) = 0x00000000; /* AlternateResourceNamesPtr (4 bytes) */
*((UINT16*) &buffer[32]) = 0x0000; /* NumAlternateResourceNames (2 bytes) */
*((UINT16*) &buffer[34]) = 0x0000; /* Pad (2 bytes) */
/* Port (4 bytes) */
*((UINT16*) &buffer[36]) = 0x0003; /* ProtocolId (RDP = 3) (2 bytes) */
*((UINT16*) &buffer[38]) = tsg->Port; /* PortNumber (0xD3D = 3389) (2 bytes) */
*((UINT32*) &buffer[40]) = 0x00000001; /* NumResourceNames (4 bytes) */
*((UINT32*) &buffer[44]) = 0x00020004; /* ResourceNamePtr (4 bytes) */
*((UINT32*) &buffer[48]) = count; /* MaxCount (4 bytes) */
*((UINT32*) &buffer[52]) = 0; /* Offset (4 bytes) */
*((UINT32*) &buffer[56]) = count; /* ActualCount (4 bytes) */
CopyMemory(&buffer[60], tsg->Hostname, count * 2); /* Array */
status = rpc_client_write_call(rpc, buffer, length, TsProxyCreateChannelOpnum);
free(buffer);
if (status <= 0)
return FALSE;
return TRUE;
}
static BOOL TsProxyCreateChannelReadResponse(rdpTsg* tsg, RPC_PDU* pdu,
CONTEXT_HANDLE* channelContext,
UINT32* channelId)
{
BYTE* buffer;
UINT32 offset;
WLog_DBG(TAG, "TsProxyCreateChannelReadResponse");
if (!pdu)
return FALSE;
buffer = Stream_Buffer(pdu->s);
if (!(pdu->Flags & RPC_PDU_FLAG_STUB))
buffer = &buffer[24];
offset = 0;
/* ChannelContext (20 bytes) */
CopyMemory(&channelContext->ContextType, &buffer[offset], 4); /* ContextType (4 bytes) */
CopyMemory(&channelContext->ContextUuid, &buffer[offset + 4], 16); /* ContextUuid (16 bytes) */
offset += 20;
*channelId = *((UINT32*) &buffer[offset]); /* ChannelId (4 bytes) */
/* ReturnValue (4 bytes) */
return TRUE;
}
/**
* HRESULT TsProxyCloseChannel(
* [in, out] PCHANNEL_CONTEXT_HANDLE_NOSERIALIZE* context
* );
*/
static BOOL TsProxyCloseChannelWriteRequest(rdpTsg* tsg, CONTEXT_HANDLE* context)
{
int status;
BYTE* buffer;
UINT32 length;
rdpRpc* rpc = tsg->rpc;
WLog_DBG(TAG, "TsProxyCloseChannelWriteRequest");
if (!context)
return FALSE;
length = 20;
buffer = (BYTE*) malloc(length);
if (!buffer)
return FALSE;
/* ChannelContext (20 bytes) */
CopyMemory(&buffer[0], &context->ContextType, 4); /* ContextType (4 bytes) */
CopyMemory(&buffer[4], &context->ContextUuid, 16); /* ContextUuid (16 bytes) */
status = rpc_client_write_call(rpc, buffer, length, TsProxyCloseChannelOpnum);
free(buffer);
if (status <= 0)
return FALSE;
return TRUE;
}
static BOOL TsProxyCloseChannelReadResponse(rdpTsg* tsg, RPC_PDU* pdu, CONTEXT_HANDLE* context)
{
BYTE* buffer;
WLog_DBG(TAG, "TsProxyCloseChannelReadResponse");
if (!pdu)
return FALSE;
buffer = Stream_Buffer(pdu->s);
if (!(pdu->Flags & RPC_PDU_FLAG_STUB))
buffer = &buffer[24];
/* ChannelContext (20 bytes) */
CopyMemory(&context->ContextType, &buffer[0], 4); /* ContextType (4 bytes) */
CopyMemory(&context->ContextUuid, &buffer[4], 16); /* ContextUuid (16 bytes) */
/* ReturnValue (4 bytes) */
return TRUE;
}
/**
* HRESULT TsProxyCloseTunnel(
* [in, out] PTUNNEL_CONTEXT_HANDLE_SERIALIZE* context
* );
*/
static BOOL TsProxyCloseTunnelWriteRequest(rdpTsg* tsg, CONTEXT_HANDLE* context)
{
int status;
BYTE* buffer;
UINT32 length;
rdpRpc* rpc = tsg->rpc;
WLog_DBG(TAG, "TsProxyCloseTunnelWriteRequest");
length = 20;
buffer = (BYTE*) malloc(length);
if (!buffer)
return FALSE;
/* TunnelContext (20 bytes) */
CopyMemory(&buffer[0], &context->ContextType, 4); /* ContextType (4 bytes) */
CopyMemory(&buffer[4], &context->ContextUuid, 16); /* ContextUuid (16 bytes) */
status = rpc_client_write_call(rpc, buffer, length, TsProxyCloseTunnelOpnum);
free(buffer);
if (status <= 0)
return FALSE;
return TRUE;
}
static BOOL TsProxyCloseTunnelReadResponse(rdpTsg* tsg, RPC_PDU* pdu, CONTEXT_HANDLE* context)
{
BYTE* buffer;
WLog_DBG(TAG, "TsProxyCloseTunnelReadResponse");
if (!pdu)
return FALSE;
buffer = Stream_Buffer(pdu->s);
if (!(pdu->Flags & RPC_PDU_FLAG_STUB))
buffer = &buffer[24];
/* TunnelContext (20 bytes) */
CopyMemory(&context->ContextType, &buffer[0], 4); /* ContextType (4 bytes) */
CopyMemory(&context->ContextUuid, &buffer[4], 16); /* ContextUuid (16 bytes) */
/* ReturnValue (4 bytes) */
return TRUE;
}
/**
* OpNum = 8
*
* DWORD TsProxySetupReceivePipe(
* [in, max_is(32767)] byte pRpcMessage[]
* );
*/
static BOOL TsProxySetupReceivePipeWriteRequest(rdpTsg* tsg, CONTEXT_HANDLE* channelContext)
{
int status;
BYTE* buffer;
UINT32 length;
rdpRpc* rpc = tsg->rpc;
WLog_DBG(TAG, "TsProxySetupReceivePipeWriteRequest");
length = 20;
buffer = (BYTE*) malloc(length);
if (!buffer)
return FALSE;
/* ChannelContext (20 bytes) */
CopyMemory(&buffer[0], &channelContext->ContextType, 4); /* ContextType (4 bytes) */
CopyMemory(&buffer[4], &channelContext->ContextUuid, 16); /* ContextUuid (16 bytes) */
status = rpc_client_write_call(rpc, buffer, length, TsProxySetupReceivePipeOpnum);
free(buffer);
if (status <= 0)
return FALSE;
return TRUE;
}
int tsg_transition_to_state(rdpTsg* tsg, TSG_STATE state)
{
const char* str = "TSG_STATE_UNKNOWN";
switch (state)
{
case TSG_STATE_INITIAL:
str = "TSG_STATE_INITIAL";
break;
case TSG_STATE_CONNECTED:
str = "TSG_STATE_CONNECTED";
break;
case TSG_STATE_AUTHORIZED:
str = "TSG_STATE_AUTHORIZED";
break;
case TSG_STATE_CHANNEL_CREATED:
str = "TSG_STATE_CHANNEL_CREATED";
break;
case TSG_STATE_PIPE_CREATED:
str = "TSG_STATE_PIPE_CREATED";
break;
case TSG_STATE_TUNNEL_CLOSE_PENDING:
str = "TSG_STATE_TUNNEL_CLOSE_PENDING";
break;
case TSG_STATE_CHANNEL_CLOSE_PENDING:
str = "TSG_STATE_CHANNEL_CLOSE_PENDING";
break;
case TSG_STATE_FINAL:
str = "TSG_STATE_FINAL";
break;
}
tsg->state = state;
WLog_DBG(TAG, "%s", str);
return 1;
}
int tsg_proxy_begin(rdpTsg* tsg)
{
TSG_PACKET tsgPacket;
PTSG_CAPABILITY_NAP tsgCapNap;
PTSG_PACKET_VERSIONCAPS packetVersionCaps;
packetVersionCaps = &tsg->packetVersionCaps;
packetVersionCaps->tsgCaps = &tsg->tsgCaps;
tsgCapNap = &tsg->tsgCaps.tsgPacket.tsgCapNap;
tsgPacket.packetId = TSG_PACKET_TYPE_VERSIONCAPS;
tsgPacket.tsgPacket.packetVersionCaps = packetVersionCaps;
packetVersionCaps->tsgHeader.ComponentId = TS_GATEWAY_TRANSPORT;
packetVersionCaps->tsgHeader.PacketId = TSG_PACKET_TYPE_VERSIONCAPS;
packetVersionCaps->numCapabilities = 1;
packetVersionCaps->majorVersion = 1;
packetVersionCaps->minorVersion = 1;
packetVersionCaps->quarantineCapabilities = 0;
packetVersionCaps->tsgCaps->capabilityType = TSG_CAPABILITY_TYPE_NAP;
/*
* Using reduced capabilities appears to trigger
* TSG_PACKET_TYPE_QUARENC_RESPONSE instead of TSG_PACKET_TYPE_CAPS_RESPONSE
*
* However, reduced capabilities may break connectivity with servers enforcing features, such as
* "Only allow connections from Remote Desktop Services clients that support RD Gateway messaging"
*/
tsgCapNap->capabilities =
TSG_NAP_CAPABILITY_QUAR_SOH |
TSG_NAP_CAPABILITY_IDLE_TIMEOUT |
TSG_MESSAGING_CAP_CONSENT_SIGN |
TSG_MESSAGING_CAP_SERVICE_MSG |
TSG_MESSAGING_CAP_REAUTH;
if (!TsProxyCreateTunnelWriteRequest(tsg, &tsgPacket))
{
WLog_ERR(TAG, "TsProxyCreateTunnel failure");
tsg->state = TSG_STATE_FINAL;
return -1;
}
tsg_transition_to_state(tsg, TSG_STATE_INITIAL);
return 1;
}
int tsg_proxy_reauth(rdpTsg* tsg)
{
TSG_PACKET tsgPacket;
PTSG_PACKET_REAUTH packetReauth;
PTSG_PACKET_VERSIONCAPS packetVersionCaps;
tsg->reauthSequence = TRUE;
packetReauth = &tsg->packetReauth;
packetVersionCaps = &tsg->packetVersionCaps;
tsgPacket.packetId = TSG_PACKET_TYPE_REAUTH;
tsgPacket.tsgPacket.packetReauth = &tsg->packetReauth;
packetReauth->tunnelContext = tsg->ReauthTunnelContext;
packetReauth->packetId = TSG_PACKET_TYPE_VERSIONCAPS;
packetReauth->tsgInitialPacket.packetVersionCaps = packetVersionCaps;
if (!TsProxyCreateTunnelWriteRequest(tsg, &tsgPacket))
{
WLog_ERR(TAG, "TsProxyCreateTunnel failure");
tsg->state = TSG_STATE_FINAL;
return -1;
}
if (!TsProxyMakeTunnelCallWriteRequest(tsg, &tsg->TunnelContext, TSG_TUNNEL_CALL_ASYNC_MSG_REQUEST))
{
WLog_ERR(TAG, "TsProxyMakeTunnelCall failure");
tsg->state = TSG_STATE_FINAL;
return -1;
}
tsg_transition_to_state(tsg, TSG_STATE_INITIAL);
return 1;
}
int tsg_recv_pdu(rdpTsg* tsg, RPC_PDU* pdu)
{
int status = -1;
RpcClientCall* call;
rdpRpc* rpc = tsg->rpc;
switch (tsg->state)
{
case TSG_STATE_INITIAL:
{
CONTEXT_HANDLE* TunnelContext;
TunnelContext = (tsg->reauthSequence) ? &tsg->NewTunnelContext : &tsg->TunnelContext;
if (!TsProxyCreateTunnelReadResponse(tsg, pdu, TunnelContext, &tsg->TunnelId))
{
WLog_ERR(TAG, "TsProxyCreateTunnelReadResponse failure");
return -1;
}
tsg_transition_to_state(tsg, TSG_STATE_CONNECTED);
if (!TsProxyAuthorizeTunnelWriteRequest(tsg, TunnelContext))
{
WLog_ERR(TAG, "TsProxyAuthorizeTunnel failure");
return -1;
}
status = 1;
}
break;
case TSG_STATE_CONNECTED:
{
CONTEXT_HANDLE* TunnelContext;
TunnelContext = (tsg->reauthSequence) ? &tsg->NewTunnelContext : &tsg->TunnelContext;
if (!TsProxyAuthorizeTunnelReadResponse(tsg, pdu))
{
WLog_ERR(TAG, "TsProxyAuthorizeTunnelReadResponse failure");
return -1;
}
tsg_transition_to_state(tsg, TSG_STATE_AUTHORIZED);
if (!tsg->reauthSequence)
{
if (!TsProxyMakeTunnelCallWriteRequest(tsg, TunnelContext, TSG_TUNNEL_CALL_ASYNC_MSG_REQUEST))
{
WLog_ERR(TAG, "TsProxyMakeTunnelCall failure");
return -1;
}
}
if (!TsProxyCreateChannelWriteRequest(tsg, TunnelContext))
{
WLog_ERR(TAG, "TsProxyCreateChannel failure");
return -1;
}
status = 1;
}
break;
case TSG_STATE_AUTHORIZED:
call = rpc_client_call_find_by_id(rpc, pdu->CallId);
if (!call)
return -1;
if (call->OpNum == TsProxyMakeTunnelCallOpnum)
{
if (!TsProxyMakeTunnelCallReadResponse(tsg, pdu))
{
WLog_ERR(TAG, "TsProxyMakeTunnelCallReadResponse failure");
return -1;
}
status = 1;
}
else if (call->OpNum == TsProxyCreateChannelOpnum)
{
CONTEXT_HANDLE ChannelContext;
if (!TsProxyCreateChannelReadResponse(tsg, pdu, &ChannelContext, &tsg->ChannelId))
{
WLog_ERR(TAG, "TsProxyCreateChannelReadResponse failure");
return -1;
}
if (!tsg->reauthSequence)
CopyMemory(&tsg->ChannelContext, &ChannelContext, sizeof(CONTEXT_HANDLE));
else
CopyMemory(&tsg->NewChannelContext, &ChannelContext, sizeof(CONTEXT_HANDLE));
tsg_transition_to_state(tsg, TSG_STATE_CHANNEL_CREATED);
if (!tsg->reauthSequence)
{
if (!TsProxySetupReceivePipeWriteRequest(tsg, &tsg->ChannelContext))
{
WLog_ERR(TAG, "TsProxySetupReceivePipe failure");
return -1;
}
}
else
{
if (!TsProxyCloseChannelWriteRequest(tsg, &tsg->NewChannelContext))
{
WLog_ERR(TAG, "TsProxyCloseChannelWriteRequest failure");
return -1;
}
if (!TsProxyCloseTunnelWriteRequest(tsg, &tsg->NewTunnelContext))
{
WLog_ERR(TAG, "TsProxyCloseTunnelWriteRequest failure");
return -1;
}
}
tsg_transition_to_state(tsg, TSG_STATE_PIPE_CREATED);
tsg->reauthSequence = FALSE;
status = 1;
}
else
{
WLog_ERR(TAG, "TSG_STATE_AUTHORIZED unexpected OpNum: %"PRIu32"\n", call->OpNum);
}
break;
case TSG_STATE_CHANNEL_CREATED:
break;
case TSG_STATE_PIPE_CREATED:
call = rpc_client_call_find_by_id(rpc, pdu->CallId);
if (!call)
return -1;
if (call->OpNum == TsProxyMakeTunnelCallOpnum)
{
if (!TsProxyMakeTunnelCallReadResponse(tsg, pdu))
{
WLog_ERR(TAG, "TsProxyMakeTunnelCallReadResponse failure");
return -1;
}
if (tsg->ReauthTunnelContext)
tsg_proxy_reauth(tsg);
status = 1;
}
else if (call->OpNum == TsProxyCloseChannelOpnum)
{
CONTEXT_HANDLE ChannelContext;
if (!TsProxyCloseChannelReadResponse(tsg, pdu, &ChannelContext))
{
WLog_ERR(TAG, "TsProxyCloseChannelReadResponse failure");
return -1;
}
status = 1;
}
else if (call->OpNum == TsProxyCloseTunnelOpnum)
{
CONTEXT_HANDLE TunnelContext;
if (!TsProxyCloseTunnelReadResponse(tsg, pdu, &TunnelContext))
{
WLog_ERR(TAG, "TsProxyCloseTunnelReadResponse failure");
return -1;
}
status = 1;
}
break;
case TSG_STATE_TUNNEL_CLOSE_PENDING:
{
CONTEXT_HANDLE ChannelContext;
if (!TsProxyCloseChannelReadResponse(tsg, pdu, &ChannelContext))
{
WLog_ERR(TAG, "TsProxyCloseChannelReadResponse failure");
return FALSE;
}
tsg_transition_to_state(tsg, TSG_STATE_CHANNEL_CLOSE_PENDING);
if (!TsProxyCloseChannelWriteRequest(tsg, NULL))
{
WLog_ERR(TAG, "TsProxyCloseChannelWriteRequest failure");
return FALSE;
}
if (!TsProxyMakeTunnelCallWriteRequest(tsg, &tsg->TunnelContext,
TSG_TUNNEL_CANCEL_ASYNC_MSG_REQUEST))
{
WLog_ERR(TAG, "TsProxyMakeTunnelCall failure");
return FALSE;
}
status = 1;
}
break;
case TSG_STATE_CHANNEL_CLOSE_PENDING:
{
CONTEXT_HANDLE TunnelContext;
if (!TsProxyCloseTunnelReadResponse(tsg, pdu, &TunnelContext))
{
WLog_ERR(TAG, "TsProxyCloseTunnelReadResponse failure");
return FALSE;
}
tsg_transition_to_state(tsg, TSG_STATE_FINAL);
status = 1;
}
break;
case TSG_STATE_FINAL:
break;
}
return status;
}
int tsg_check_event_handles(rdpTsg* tsg)
{
int status;
status = rpc_client_in_channel_recv(tsg->rpc);
if (status < 0)
return -1;
status = rpc_client_out_channel_recv(tsg->rpc);
if (status < 0)
return -1;
return status;
}
DWORD tsg_get_event_handles(rdpTsg* tsg, HANDLE* events, DWORD count)
{
UINT32 nCount = 0;
rdpRpc* rpc = tsg->rpc;
RpcVirtualConnection* connection = rpc->VirtualConnection;
if (events && (nCount < count))
{
events[nCount] = rpc->client->PipeEvent;
nCount++;
}
else
return 0;
if (connection->DefaultInChannel && connection->DefaultInChannel->tls)
{
if (events && (nCount < count))
{
BIO_get_event(connection->DefaultInChannel->tls->bio, &events[nCount]);
nCount++;
}
else
return 0;
}
if (connection->NonDefaultInChannel && connection->NonDefaultInChannel->tls)
{
if (events && (nCount < count))
{
BIO_get_event(connection->NonDefaultInChannel->tls->bio, &events[nCount]);
nCount++;
}
else
return 0;
}
if (connection->DefaultOutChannel && connection->DefaultOutChannel->tls)
{
if (events && (nCount < count))
{
BIO_get_event(connection->DefaultOutChannel->tls->bio, &events[nCount]);
nCount++;
}
else
return 0;
}
if (connection->NonDefaultOutChannel && connection->NonDefaultOutChannel->tls)
{
if (events && (nCount < count))
{
BIO_get_event(connection->NonDefaultOutChannel->tls->bio, &events[nCount]);
nCount++;
}
else
return 0;
}
return nCount;
}
static BOOL tsg_set_hostname(rdpTsg* tsg, const char* hostname)
{
free(tsg->Hostname);
tsg->Hostname = NULL;
ConvertToUnicode(CP_UTF8, 0, hostname, -1, &tsg->Hostname, 0);
return TRUE;
}
static BOOL tsg_set_machine_name(rdpTsg* tsg, const char* machineName)
{
free(tsg->MachineName);
tsg->MachineName = NULL;
ConvertToUnicode(CP_UTF8, 0, machineName, -1, &tsg->MachineName, 0);
return TRUE;
}
BOOL tsg_connect(rdpTsg* tsg, const char* hostname, UINT16 port, int timeout)
{
DWORD nCount;
HANDLE events[64];
rdpRpc* rpc = tsg->rpc;
rdpSettings* settings = rpc->settings;
rdpTransport* transport = rpc->transport;
tsg->Port = port;
tsg->transport = transport;
if (!settings->GatewayPort)
settings->GatewayPort = 443;
tsg_set_hostname(tsg, hostname);
tsg_set_machine_name(tsg, settings->ComputerName);
if (!rpc_connect(rpc, timeout))
{
WLog_ERR(TAG, "rpc_connect error!");
return FALSE;
}
nCount = tsg_get_event_handles(tsg, events, 64);
if (nCount == 0)
return FALSE;
while (tsg->state != TSG_STATE_PIPE_CREATED)
{
WaitForMultipleObjects(nCount, events, FALSE, 250);
if (tsg_check_event_handles(tsg) < 0)
{
WLog_ERR(TAG, "tsg_check failure");
transport->layer = TRANSPORT_LAYER_CLOSED;
return FALSE;
}
}
WLog_INFO(TAG, "TS Gateway Connection Success");
tsg->bio = BIO_new(BIO_s_tsg());
if (!tsg->bio)
return FALSE;
BIO_set_data(tsg->bio, (void*) tsg);
return TRUE;
}
BOOL tsg_disconnect(rdpTsg* tsg)
{
/**
* Gateway Shutdown Phase
*
* Client Server
* | |
* |-------------TsProxyCloseChannel Request---------->|
* | |
* |<-------TsProxySetupReceivePipe Final Response-----|
* |<-----------TsProxyCloseChannel Response-----------|
* | |
* |----TsProxyMakeTunnelCall Request (cancel async)-->|
* | |
* |<---TsProxyMakeTunnelCall Response (call async)----|
* |<---TsProxyMakeTunnelCall Response (cancel async)--|
* | |
* |--------------TsProxyCloseTunnel Request---------->|
* |<-------------TsProxyCloseTunnel Response----------|
* | |
*/
if (!tsg)
return FALSE;
if (tsg->state != TSG_STATE_TUNNEL_CLOSE_PENDING)
{
if (!TsProxyCloseChannelWriteRequest(tsg, &tsg->ChannelContext))
return FALSE;
tsg->state = TSG_STATE_CHANNEL_CLOSE_PENDING;
}
return TRUE;
}
/**
* @brief
*
* @param[in] tsg
* @param[in] data
* @param[in] length
* @return < 0 on error; 0 if not enough data is available (non blocking mode); > 0 bytes to read
*/
static int tsg_read(rdpTsg* tsg, BYTE* data, UINT32 length)
{
rdpRpc* rpc;
int status = 0;
if (!tsg)
return -1;
rpc = tsg->rpc;
if (rpc->transport->layer == TRANSPORT_LAYER_CLOSED)
{
WLog_ERR(TAG, "tsg_read error: connection lost");
return -1;
}
do
{
status = rpc_client_receive_pipe_read(rpc, data, (size_t) length);
if (status < 0)
return -1;
if (!status && !rpc->transport->blocking)
return 0;
if (rpc->transport->layer == TRANSPORT_LAYER_CLOSED)
{
WLog_ERR(TAG, "tsg_read error: connection lost");
return -1;
}
if (status > 0)
break;
if (rpc->transport->blocking)
{
while (WaitForSingleObject(rpc->client->PipeEvent, 0) != WAIT_OBJECT_0)
{
if (tsg_check_event_handles(tsg) < 0)
return -1;
WaitForSingleObject(rpc->client->PipeEvent, 100);
}
}
}
while (rpc->transport->blocking);
return status;
}
static int tsg_write(rdpTsg* tsg, BYTE* data, UINT32 length)
{
int status;
if (tsg->rpc->transport->layer == TRANSPORT_LAYER_CLOSED)
{
WLog_ERR(TAG, "error, connection lost");
return -1;
}
status = TsProxySendToServer((handle_t) tsg, data, 1, &length);
if (status < 0)
return -1;
return length;
}
rdpTsg* tsg_new(rdpTransport* transport)
{
rdpTsg* tsg;
tsg = (rdpTsg*) calloc(1, sizeof(rdpTsg));
if (!tsg)
return NULL;
tsg->transport = transport;
tsg->settings = transport->settings;
tsg->rpc = rpc_new(tsg->transport);
if (!tsg->rpc)
goto out_free;
return tsg;
out_free:
free(tsg);
return NULL;
}
void tsg_free(rdpTsg* tsg)
{
if (tsg)
{
if (tsg->rpc)
{
rpc_free(tsg->rpc);
tsg->rpc = NULL;
}
free(tsg->Hostname);
free(tsg->MachineName);
free(tsg);
}
}
static int transport_bio_tsg_write(BIO* bio, const char* buf, int num)
{
int status;
rdpTsg* tsg = (rdpTsg*) BIO_get_data(bio);
BIO_clear_flags(bio, BIO_FLAGS_WRITE);
status = tsg_write(tsg, (BYTE*) buf, num);
if (status < 0)
{
BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY);
return -1;
}
else if (status == 0)
{
BIO_set_flags(bio, BIO_FLAGS_WRITE);
WSASetLastError(WSAEWOULDBLOCK);
}
else
{
BIO_set_flags(bio, BIO_FLAGS_WRITE);
}
return status >= 0 ? status : -1;
}
static int transport_bio_tsg_read(BIO* bio, char* buf, int size)
{
int status;
rdpTsg* tsg = (rdpTsg*) BIO_get_data(bio);
BIO_clear_flags(bio, BIO_FLAGS_READ);
status = tsg_read(tsg, (BYTE*) buf, size);
if (status < 0)
{
BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY);
return -1;
}
else if (status == 0)
{
BIO_set_flags(bio, BIO_FLAGS_READ);
WSASetLastError(WSAEWOULDBLOCK);
}
else
{
BIO_set_flags(bio, BIO_FLAGS_READ);
}
return status > 0 ? status : -1;
}
static int transport_bio_tsg_puts(BIO* bio, const char* str)
{
return 1;
}
static int transport_bio_tsg_gets(BIO* bio, char* str, int size)
{
return 1;
}
static long transport_bio_tsg_ctrl(BIO* bio, int cmd, long arg1, void* arg2)
{
int status = 0;
rdpTsg* tsg = (rdpTsg*) BIO_get_data(bio);
RpcVirtualConnection* connection = tsg->rpc->VirtualConnection;
RpcInChannel* inChannel = connection->DefaultInChannel;
RpcOutChannel* outChannel = connection->DefaultOutChannel;
if (cmd == BIO_CTRL_FLUSH)
{
(void)BIO_flush(inChannel->tls->bio);
(void)BIO_flush(outChannel->tls->bio);
status = 1;
}
else if (cmd == BIO_C_GET_EVENT)
{
if (arg2)
{
*((ULONG_PTR*) arg2) = (ULONG_PTR) tsg->rpc->client->PipeEvent;
status = 1;
}
}
else if (cmd == BIO_C_SET_NONBLOCK)
{
status = 1;
}
else if (cmd == BIO_C_READ_BLOCKED)
{
BIO* bio = outChannel->bio;
status = BIO_read_blocked(bio);
}
else if (cmd == BIO_C_WRITE_BLOCKED)
{
BIO* bio = inChannel->bio;
status = BIO_write_blocked(bio);
}
else if (cmd == BIO_C_WAIT_READ)
{
int timeout = (int) arg1;
BIO* bio = outChannel->bio;
if (BIO_read_blocked(bio))
return BIO_wait_read(bio, timeout);
else if (BIO_write_blocked(bio))
return BIO_wait_write(bio, timeout);
else
status = 1;
}
else if (cmd == BIO_C_WAIT_WRITE)
{
int timeout = (int) arg1;
BIO* bio = inChannel->bio;
if (BIO_write_blocked(bio))
status = BIO_wait_write(bio, timeout);
else if (BIO_read_blocked(bio))
status = BIO_wait_read(bio, timeout);
else
status = 1;
}
return status;
}
static int transport_bio_tsg_new(BIO* bio)
{
BIO_set_init(bio, 1);
BIO_set_flags(bio, BIO_FLAGS_SHOULD_RETRY);
return 1;
}
static int transport_bio_tsg_free(BIO* bio)
{
return 1;
}
BIO_METHOD* BIO_s_tsg(void)
{
static BIO_METHOD* bio_methods = NULL;
if (bio_methods == NULL)
{
if (!(bio_methods = BIO_meth_new(BIO_TYPE_TSG, "TSGateway")))
return NULL;
BIO_meth_set_write(bio_methods, transport_bio_tsg_write);
BIO_meth_set_read(bio_methods, transport_bio_tsg_read);
BIO_meth_set_puts(bio_methods, transport_bio_tsg_puts);
BIO_meth_set_gets(bio_methods, transport_bio_tsg_gets);
BIO_meth_set_ctrl(bio_methods, transport_bio_tsg_ctrl);
BIO_meth_set_create(bio_methods, transport_bio_tsg_new);
BIO_meth_set_destroy(bio_methods, transport_bio_tsg_free);
}
return bio_methods;
}
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