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/**
* FreeRDP: A Remote Desktop Protocol Client
* RDP Protocol Security Negotiation
*
* Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.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 __NEGO_H
#define __NEGO_H
#include "transport.h"
#include <freerdp/types.h>
#include <freerdp/settings.h>
#include <freerdp/utils/blob.h>
#include <freerdp/utils/debug.h>
#include <freerdp/utils/stream.h>
/* Protocol Security Negotiation Protocols */
enum RDP_NEG_PROTOCOLS
{
PROTOCOL_RDP = 0x00000000,
PROTOCOL_TLS = 0x00000001,
PROTOCOL_NLA = 0x00000002
};
/* Protocol Security Negotiation Failure Codes */
enum RDP_NEG_FAILURE_FAILURECODES
{
SSL_REQUIRED_BY_SERVER = 0x00000001,
SSL_NOT_ALLOWED_BY_SERVER = 0x00000002,
SSL_CERT_NOT_ON_SERVER = 0x00000003,
INCONSISTENT_FLAGS = 0x00000004,
HYBRID_REQUIRED_BY_SERVER = 0x00000005
};
enum _NEGO_STATE
{
NEGO_STATE_INITIAL,
NEGO_STATE_NLA, /* Network Level Authentication (TLS implicit) */
NEGO_STATE_TLS, /* TLS Encryption without NLA */
NEGO_STATE_RDP, /* Standard Legacy RDP Encryption */
NEGO_STATE_FAIL, /* Negotiation failure */
NEGO_STATE_FINAL
};
typedef enum _NEGO_STATE NEGO_STATE;
/* RDP Negotiation Messages */
enum RDP_NEG_MSG
{
/* X224_TPDU_CONNECTION_REQUEST */
TYPE_RDP_NEG_REQ = 0x1,
/* X224_TPDU_CONNECTION_CONFIRM */
TYPE_RDP_NEG_RSP = 0x2,
TYPE_RDP_NEG_FAILURE = 0x3
};
#define EXTENDED_CLIENT_DATA_SUPPORTED 0x01
struct rdp_nego
{
int port;
uint32 flags;
char* hostname;
char* cookie;
NEGO_STATE state;
int tcp_connected;
rdpBlob* routing_token;
uint32 selected_protocol;
uint32 requested_protocols;
uint8 enabled_protocols[3];
rdpTransport* transport;
};
typedef struct rdp_nego rdpNego;
boolean nego_connect(rdpNego* nego);
void nego_attempt_nla(rdpNego* nego);
void nego_attempt_tls(rdpNego* nego);
void nego_attempt_rdp(rdpNego* nego);
void nego_send(rdpNego* nego);
boolean nego_recv(rdpTransport* transport, STREAM* s, void* extra);
boolean nego_recv_response(rdpNego* nego);
boolean nego_read_request(rdpNego* nego, STREAM* s);
boolean nego_send_negotiation_request(rdpNego* nego);
void nego_process_negotiation_request(rdpNego* nego, STREAM* s);
void nego_process_negotiation_response(rdpNego* nego, STREAM* s);
void nego_process_negotiation_failure(rdpNego* nego, STREAM* s);
boolean nego_send_negotiation_response(rdpNego* nego);
rdpNego* nego_new(struct rdp_transport * transport);
void nego_free(rdpNego* nego);
void nego_init(rdpNego* nego);
void nego_set_target(rdpNego* nego, char* hostname, int port);
void nego_enable_rdp(rdpNego* nego, boolean enable_rdp);
void nego_enable_nla(rdpNego* nego, boolean enable_nla);
void nego_enable_tls(rdpNego* nego, boolean enable_tls);
void nego_set_routing_token(rdpNego* nego, rdpBlob* routing_token);
void nego_set_cookie(rdpNego* nego, char* cookie);
#ifdef WITH_DEBUG_NEGO
#define DEBUG_NEGO(fmt, ...) DEBUG_CLASS(NEGO, fmt, ## __VA_ARGS__)
#else
#define DEBUG_NEGO(fmt, ...) DEBUG_NULL(fmt, ## __VA_ARGS__)
#endif
#endif /* __NEGO_H */
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