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FreeRDP/libfreerdp/core/rdp.h
fifthdegree 4cbfa006f2 Implement support for RDS AAD 
Have a working implementation of the RDS AAD enhanced security mechanism
for Azure AD logons
2023-03-10 16:38:07 +01:00

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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* RDP Core
*
* Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
* Copyright 2014 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.
*/
#ifndef FREERDP_LIB_CORE_RDP_H
#define FREERDP_LIB_CORE_RDP_H
#include <freerdp/config.h>
#include "nla.h"
#include "aad.h"
#include "mcs.h"
#include "tpkt.h"
#include "../codec/bulk.h"
#include "fastpath.h"
#include "tpdu.h"
#include "nego.h"
#include "input.h"
#include "update.h"
#include "license.h"
#include "errinfo.h"
#include "autodetect.h"
#include "heartbeat.h"
#include "multitransport.h"
#include "security.h"
#include "transport.h"
#include "connection.h"
#include "redirection.h"
#include "capabilities.h"
#include "channels.h"
#include <freerdp/freerdp.h>
#include <freerdp/settings.h>
#include <freerdp/log.h>
#include <freerdp/api.h>
#include <winpr/stream.h>
#include <winpr/crypto.h>
/* Security Header Flags */
#define SEC_EXCHANGE_PKT 0x0001
#define SEC_TRANSPORT_REQ 0x0002
#define SEC_TRANSPORT_RSP 0x0004
#define SEC_ENCRYPT 0x0008
#define SEC_RESET_SEQNO 0x0010
#define SEC_IGNORE_SEQNO 0x0020
#define SEC_INFO_PKT 0x0040
#define SEC_LICENSE_PKT 0x0080
#define SEC_LICENSE_ENCRYPT_CS 0x0200
#define SEC_LICENSE_ENCRYPT_SC 0x0200
#define SEC_REDIRECTION_PKT 0x0400
#define SEC_SECURE_CHECKSUM 0x0800
#define SEC_AUTODETECT_REQ 0x1000
#define SEC_AUTODETECT_RSP 0x2000
#define SEC_HEARTBEAT 0x4000
#define SEC_FLAGSHI_VALID 0x8000
#define SEC_PKT_CS_MASK (SEC_EXCHANGE_PKT | SEC_INFO_PKT)
#define SEC_PKT_SC_MASK (SEC_LICENSE_PKT | SEC_REDIRECTION_PKT)
#define SEC_PKT_MASK (SEC_PKT_CS_MASK | SEC_PKT_SC_MASK)
#define RDP_SECURITY_HEADER_LENGTH 4
#define RDP_SHARE_CONTROL_HEADER_LENGTH 6
#define RDP_SHARE_DATA_HEADER_LENGTH 12
#define RDP_PACKET_HEADER_MAX_LENGTH (TPDU_DATA_LENGTH + MCS_SEND_DATA_HEADER_MAX_LENGTH)
#define PDU_TYPE_DEMAND_ACTIVE 0x1
#define PDU_TYPE_CONFIRM_ACTIVE 0x3
#define PDU_TYPE_DEACTIVATE_ALL 0x6
#define PDU_TYPE_DATA 0x7
#define PDU_TYPE_SERVER_REDIRECTION 0xA
#define PDU_TYPE_FLOW_TEST 0x41
#define PDU_TYPE_FLOW_RESPONSE 0x42
#define PDU_TYPE_FLOW_STOP 0x43
typedef enum
{
FINALIZE_SC_SYNCHRONIZE_PDU = 0x01,
FINALIZE_SC_CONTROL_COOPERATE_PDU = 0x02,
FINALIZE_SC_CONTROL_GRANTED_PDU = 0x04,
FINALIZE_SC_FONT_MAP_PDU = 0x08,
FINALIZE_CS_SYNCHRONIZE_PDU = 0x10,
FINALIZE_CS_CONTROL_COOPERATE_PDU = 0x20,
FINALIZE_CS_CONTROL_REQUEST_PDU = 0x40,
FINALIZE_CS_PERSISTENT_KEY_LIST_PDU = 0x80,
FINALIZE_CS_FONT_LIST_PDU = 0x100,
FINALIZE_DEACTIVATE_REACTIVATE = 0x200
} rdpFinalizePduType;
/* Data PDU Types */
typedef enum
{
DATA_PDU_TYPE_UPDATE = 0x02,
DATA_PDU_TYPE_CONTROL = 0x14,
DATA_PDU_TYPE_POINTER = 0x1B,
DATA_PDU_TYPE_INPUT = 0x1C,
DATA_PDU_TYPE_SYNCHRONIZE = 0x1F,
DATA_PDU_TYPE_REFRESH_RECT = 0x21,
DATA_PDU_TYPE_PLAY_SOUND = 0x22,
DATA_PDU_TYPE_SUPPRESS_OUTPUT = 0x23,
DATA_PDU_TYPE_SHUTDOWN_REQUEST = 0x24,
DATA_PDU_TYPE_SHUTDOWN_DENIED = 0x25,
DATA_PDU_TYPE_SAVE_SESSION_INFO = 0x26,
DATA_PDU_TYPE_FONT_LIST = 0x27,
DATA_PDU_TYPE_FONT_MAP = 0x28,
DATA_PDU_TYPE_SET_KEYBOARD_INDICATORS = 0x29,
DATA_PDU_TYPE_BITMAP_CACHE_PERSISTENT_LIST = 0x2B,
DATA_PDU_TYPE_BITMAP_CACHE_ERROR = 0x2C,
DATA_PDU_TYPE_SET_KEYBOARD_IME_STATUS = 0x2D,
DATA_PDU_TYPE_OFFSCREEN_CACHE_ERROR = 0x2E,
DATA_PDU_TYPE_SET_ERROR_INFO = 0x2F,
DATA_PDU_TYPE_DRAW_NINEGRID_ERROR = 0x30,
DATA_PDU_TYPE_DRAW_GDIPLUS_ERROR = 0x31,
DATA_PDU_TYPE_ARC_STATUS = 0x32,
DATA_PDU_TYPE_STATUS_INFO = 0x36,
DATA_PDU_TYPE_MONITOR_LAYOUT = 0x37,
DATA_PDU_TYPE_FRAME_ACKNOWLEDGE = 0x38
} rdpPduType;
/* Stream Identifiers */
#define STREAM_UNDEFINED 0x00
#define STREAM_LOW 0x01
#define STREAM_MED 0x02
#define STREAM_HI 0x04
struct rdp_rdp
{
CONNECTION_STATE state;
rdpContext* context;
rdpNla* nla;
rdpAad* aad;
rdpMcs* mcs;
rdpNego* nego;
rdpBulk* bulk;
rdpInput* input;
rdpUpdate* update;
rdpFastPath* fastpath;
rdpLicense* license;
rdpRedirection* redirection;
rdpSettings* settings;
rdpSettings* originalSettings;
rdpSettings* remoteSettings;
rdpTransport* transport;
rdpAutoDetect* autodetect;
rdpHeartbeat* heartbeat;
rdpMultitransport* multitransport;
WINPR_RC4_CTX* rc4_decrypt_key;
UINT32 decrypt_use_count;
UINT32 decrypt_checksum_use_count;
WINPR_RC4_CTX* rc4_encrypt_key;
UINT32 encrypt_use_count;
UINT32 encrypt_checksum_use_count;
WINPR_CIPHER_CTX* fips_encrypt;
WINPR_CIPHER_CTX* fips_decrypt;
UINT32 sec_flags;
BOOL do_crypt;
BOOL do_crypt_license;
BOOL do_secure_checksum;
BYTE sign_key[16];
BYTE decrypt_key[16];
BYTE encrypt_key[16];
BYTE decrypt_update_key[16];
BYTE encrypt_update_key[16];
size_t rc4_key_len;
BYTE fips_sign_key[20];
BYTE fips_encrypt_key[24];
BYTE fips_decrypt_key[24];
UINT32 errorInfo;
UINT32 finalize_sc_pdus;
BOOL resendFocus;
UINT64 inBytes;
UINT64 inPackets;
UINT64 outBytes;
UINT64 outPackets;
CRITICAL_SECTION critical;
rdpTransportIo* io;
void* ioContext;
HANDLE abortEvent;
wPubSub* pubSub;
BOOL was_deactivated;
UINT32 deactivated_width;
UINT32 deactivated_height;
};
FREERDP_LOCAL BOOL rdp_read_security_header(wStream* s, UINT16* flags, UINT16* length);
FREERDP_LOCAL BOOL rdp_write_security_header(wStream* s, UINT16 flags);
FREERDP_LOCAL BOOL rdp_read_share_control_header(wStream* s, UINT16* tpktLength,
UINT16* remainingLength, UINT16* type,
UINT16* channel_id);
FREERDP_LOCAL BOOL rdp_read_share_data_header(wStream* s, UINT16* length, BYTE* type,
UINT32* share_id, BYTE* compressed_type,
UINT16* compressed_len);
FREERDP_LOCAL wStream* rdp_send_stream_init(rdpRdp* rdp);
FREERDP_LOCAL wStream* rdp_send_stream_pdu_init(rdpRdp* rdp);
FREERDP_LOCAL BOOL rdp_read_header(rdpRdp* rdp, wStream* s, UINT16* length, UINT16* channel_id);
FREERDP_LOCAL BOOL rdp_write_header(rdpRdp* rdp, wStream* s, UINT16 length, UINT16 channel_id);
FREERDP_LOCAL BOOL rdp_send_pdu(rdpRdp* rdp, wStream* s, UINT16 type, UINT16 channel_id);
FREERDP_LOCAL wStream* rdp_data_pdu_init(rdpRdp* rdp);
FREERDP_LOCAL BOOL rdp_send_data_pdu(rdpRdp* rdp, wStream* s, BYTE type, UINT16 channel_id);
FREERDP_LOCAL state_run_t rdp_recv_data_pdu(rdpRdp* rdp, wStream* s);
FREERDP_LOCAL BOOL rdp_send(rdpRdp* rdp, wStream* s, UINT16 channelId);
FREERDP_LOCAL BOOL rdp_send_channel_data(rdpRdp* rdp, UINT16 channelId, const BYTE* data,
size_t size);
FREERDP_LOCAL BOOL rdp_channel_send_packet(rdpRdp* rdp, UINT16 channelId, size_t totalSize,
UINT32 flags, const BYTE* data, size_t chunkSize);
FREERDP_LOCAL wStream* rdp_message_channel_pdu_init(rdpRdp* rdp);
FREERDP_LOCAL BOOL rdp_send_message_channel_pdu(rdpRdp* rdp, wStream* s, UINT16 sec_flags);
FREERDP_LOCAL state_run_t rdp_recv_message_channel_pdu(rdpRdp* rdp, wStream* s,
UINT16 securityFlags);
FREERDP_LOCAL state_run_t rdp_recv_out_of_sequence_pdu(rdpRdp* rdp, wStream* s);
FREERDP_LOCAL state_run_t rdp_recv_callback(rdpTransport* transport, wStream* s, void* extra);
FREERDP_LOCAL int rdp_check_fds(rdpRdp* rdp);
FREERDP_LOCAL rdpRdp* rdp_new(rdpContext* context);
FREERDP_LOCAL BOOL rdp_reset(rdpRdp* rdp);
FREERDP_LOCAL void rdp_free(rdpRdp* rdp);
FREERDP_LOCAL BOOL rdp_io_callback_set_event(rdpRdp* rdp, BOOL reset);
FREERDP_LOCAL const rdpTransportIo* rdp_get_io_callbacks(rdpRdp* rdp);
FREERDP_LOCAL BOOL rdp_set_io_callbacks(rdpRdp* rdp, const rdpTransportIo* io_callbacks);
FREERDP_LOCAL BOOL rdp_set_io_callback_context(rdpRdp* rdp, void* usercontext);
FREERDP_LOCAL void* rdp_get_io_callback_context(rdpRdp* rdp);
#define RDP_TAG FREERDP_TAG("core.rdp")
#ifdef WITH_DEBUG_RDP
#define DEBUG_RDP(...) WLog_DBG(RDP_TAG, __VA_ARGS__)
#else
#define DEBUG_RDP(...) \
do \
{ \
} while (0)
#endif
const char* data_pdu_type_to_string(UINT8 type);
const char* pdu_type_to_str(UINT16 pduType, char* buffer, size_t length);
BOOL rdp_finalize_reset_flags(rdpRdp* rdp, BOOL clearAll);
BOOL rdp_finalize_set_flag(rdpRdp* rdp, UINT32 flag);
BOOL rdp_finalize_is_flag_set(rdpRdp* rdp, UINT32 flag);
const char* rdp_finalize_flags_to_str(UINT32 flags, char* buffer, size_t size);
BOOL rdp_decrypt(rdpRdp* rdp, wStream* s, UINT16* pLength, UINT16 securityFlags);
BOOL rdp_set_error_info(rdpRdp* rdp, UINT32 errorInfo);
BOOL rdp_send_error_info(rdpRdp* rdp);
void rdp_free_rc4_encrypt_keys(rdpRdp* rdp);
BOOL rdp_reset_rc4_encrypt_keys(rdpRdp* rdp);
void rdp_free_rc4_decrypt_keys(rdpRdp* rdp);
BOOL rdp_reset_rc4_decrypt_keys(rdpRdp* rdp);
const char* rdp_security_flag_string(UINT32 securityFlags, char* buffer, size_t size);
BOOL rdp_set_backup_settings(rdpRdp* rdp);
BOOL rdp_reset_runtime_settings(rdpRdp* rdp);
void rdp_log_build_warnings(void);
#endif /* FREERDP_LIB_CORE_RDP_H */
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