/**
 * WinPR: Windows Portable Runtime
 * NTLM Security Package
 *
 * Copyright 2011-2014 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 WINPR_SSPI_NTLM_PRIVATE_H
#define WINPR_SSPI_NTLM_PRIVATE_H

#include <winpr/sspi.h>
#include <winpr/windows.h>

#include <winpr/nt.h>
#include <winpr/crypto.h>
#include <winpr/sysinfo.h>

#include "../sspi.h"

#define MESSAGE_TYPE_NEGOTIATE 1
#define MESSAGE_TYPE_CHALLENGE 2
#define MESSAGE_TYPE_AUTHENTICATE 3

#define NTLMSSP_NEGOTIATE_56 0x80000000                        /* W   (0) */
#define NTLMSSP_NEGOTIATE_KEY_EXCH 0x40000000                  /* V   (1) */
#define NTLMSSP_NEGOTIATE_128 0x20000000                       /* U   (2) */
#define NTLMSSP_RESERVED1 0x10000000                           /* r1  (3) */
#define NTLMSSP_RESERVED2 0x08000000                           /* r2  (4) */
#define NTLMSSP_RESERVED3 0x04000000                           /* r3  (5) */
#define NTLMSSP_NEGOTIATE_VERSION 0x02000000                   /* T   (6) */
#define NTLMSSP_RESERVED4 0x01000000                           /* r4  (7) */
#define NTLMSSP_NEGOTIATE_TARGET_INFO 0x00800000               /* S   (8) */
#define NTLMSSP_REQUEST_NON_NT_SESSION_KEY 0x00400000          /* R   (9) */
#define NTLMSSP_RESERVED5 0x00200000                           /* r5  (10) */
#define NTLMSSP_NEGOTIATE_IDENTIFY 0x00100000                  /* Q   (11) */
#define NTLMSSP_NEGOTIATE_EXTENDED_SESSION_SECURITY 0x00080000 /* P   (12) */
#define NTLMSSP_RESERVED6 0x00040000                           /* r6  (13) */
#define NTLMSSP_TARGET_TYPE_SERVER 0x00020000                  /* O   (14) */
#define NTLMSSP_TARGET_TYPE_DOMAIN 0x00010000                  /* N   (15) */
#define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x00008000               /* M   (16) */
#define NTLMSSP_RESERVED7 0x00004000                           /* r7  (17) */
#define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x00002000      /* L   (18) */
#define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x00001000           /* K   (19) */
#define NTLMSSP_NEGOTIATE_ANONYMOUS 0x00000800                 /* J   (20) */
#define NTLMSSP_RESERVED8 0x00000400                           /* r8  (21) */
#define NTLMSSP_NEGOTIATE_NTLM 0x00000200                      /* H   (22) */
#define NTLMSSP_RESERVED9 0x00000100                           /* r9  (23) */
#define NTLMSSP_NEGOTIATE_LM_KEY 0x00000080                    /* G   (24) */
#define NTLMSSP_NEGOTIATE_DATAGRAM 0x00000040                  /* F   (25) */
#define NTLMSSP_NEGOTIATE_SEAL 0x00000020                      /* E   (26) */
#define NTLMSSP_NEGOTIATE_SIGN 0x00000010                      /* D   (27) */
#define NTLMSSP_RESERVED10 0x00000008                          /* r10 (28) */
#define NTLMSSP_REQUEST_TARGET 0x00000004                      /* C   (29) */
#define NTLMSSP_NEGOTIATE_OEM 0x00000002                       /* B   (30) */
#define NTLMSSP_NEGOTIATE_UNICODE 0x00000001                   /* A   (31) */

typedef enum
{
	NTLM_STATE_INITIAL,
	NTLM_STATE_NEGOTIATE,
	NTLM_STATE_CHALLENGE,
	NTLM_STATE_AUTHENTICATE,
	NTLM_STATE_FINAL
} NTLM_STATE;

#ifdef __MINGW32__
typedef MSV1_0_AVID NTLM_AV_ID;

#if __MINGW64_VERSION_MAJOR < 9
enum
{
	MsvAvTimestamp = MsvAvFlags + 1,
	MsvAvRestrictions,
	MsvAvTargetName,
	MsvAvChannelBindings,
	MsvAvSingleHost = MsvAvRestrictions
};

#else
#ifndef MsvAvSingleHost
#define MsvAvSingleHost MsvAvRestrictions
#endif
#endif
#else
typedef enum
{
	MsvAvEOL,
	MsvAvNbComputerName,
	MsvAvNbDomainName,
	MsvAvDnsComputerName,
	MsvAvDnsDomainName,
	MsvAvDnsTreeName,
	MsvAvFlags,
	MsvAvTimestamp,
	MsvAvSingleHost,
	MsvAvTargetName,
	MsvAvChannelBindings
} NTLM_AV_ID;
#endif /* __MINGW32__ */

typedef struct
{
	UINT16 AvId;
	UINT16 AvLen;
} NTLM_AV_PAIR;

#define MSV_AV_FLAGS_AUTHENTICATION_CONSTRAINED 0x00000001
#define MSV_AV_FLAGS_MESSAGE_INTEGRITY_CHECK 0x00000002
#define MSV_AV_FLAGS_TARGET_SPN_UNTRUSTED_SOURCE 0x00000004

#define WINDOWS_MAJOR_VERSION_5 0x05
#define WINDOWS_MAJOR_VERSION_6 0x06
#define WINDOWS_MINOR_VERSION_0 0x00
#define WINDOWS_MINOR_VERSION_1 0x01
#define WINDOWS_MINOR_VERSION_2 0x02
#define NTLMSSP_REVISION_W2K3 0x0F

typedef struct
{
	UINT8 ProductMajorVersion;
	UINT8 ProductMinorVersion;
	UINT16 ProductBuild;
	BYTE Reserved[3];
	UINT8 NTLMRevisionCurrent;
} NTLM_VERSION_INFO;

typedef struct
{
	UINT32 Size;
	UINT32 Z4;
	UINT32 DataPresent;
	UINT32 CustomData;
	BYTE MachineID[32];
} NTLM_SINGLE_HOST_DATA;

typedef struct
{
	BYTE Response[24];
} NTLM_RESPONSE;

typedef struct
{
	UINT8 RespType;
	UINT8 HiRespType;
	UINT16 Reserved1;
	UINT32 Reserved2;
	BYTE Timestamp[8];
	BYTE ClientChallenge[8];
	UINT32 Reserved3;
	NTLM_AV_PAIR* AvPairs;
	UINT32 cbAvPairs;
} NTLMv2_CLIENT_CHALLENGE;

typedef struct
{
	BYTE Response[16];
	NTLMv2_CLIENT_CHALLENGE Challenge;
} NTLMv2_RESPONSE;

typedef struct
{
	UINT16 Len;
	UINT16 MaxLen;
	PBYTE Buffer;
	UINT32 BufferOffset;
} NTLM_MESSAGE_FIELDS;

typedef struct
{
	BYTE Signature[8];
	UINT32 MessageType;
} NTLM_MESSAGE_HEADER;

typedef struct
{
	NTLM_MESSAGE_HEADER header;
	UINT32 NegotiateFlags;
	NTLM_VERSION_INFO Version;
	NTLM_MESSAGE_FIELDS DomainName;
	NTLM_MESSAGE_FIELDS Workstation;
} NTLM_NEGOTIATE_MESSAGE;

typedef struct
{
	NTLM_MESSAGE_HEADER header;
	UINT32 NegotiateFlags;
	BYTE ServerChallenge[8];
	BYTE Reserved[8];
	NTLM_VERSION_INFO Version;
	NTLM_MESSAGE_FIELDS TargetName;
	NTLM_MESSAGE_FIELDS TargetInfo;
} NTLM_CHALLENGE_MESSAGE;

typedef struct
{
	NTLM_MESSAGE_HEADER header;
	UINT32 NegotiateFlags;
	NTLM_VERSION_INFO Version;
	NTLM_MESSAGE_FIELDS DomainName;
	NTLM_MESSAGE_FIELDS UserName;
	NTLM_MESSAGE_FIELDS Workstation;
	NTLM_MESSAGE_FIELDS LmChallengeResponse;
	NTLM_MESSAGE_FIELDS NtChallengeResponse;
	NTLM_MESSAGE_FIELDS EncryptedRandomSessionKey;
	BYTE MessageIntegrityCheck[16];
} NTLM_AUTHENTICATE_MESSAGE;

typedef struct
{
	BOOL server;
	BOOL NTLMv2;
	BOOL UseMIC;
	NTLM_STATE state;
	int SendSeqNum;
	int RecvSeqNum;
	char* SamFile;
	BYTE NtlmHash[16];
	BYTE NtlmV2Hash[16];
	BYTE MachineID[32];
	BOOL SendVersionInfo;
	BOOL confidentiality;
	WINPR_RC4_CTX* SendRc4Seal;
	WINPR_RC4_CTX* RecvRc4Seal;
	BYTE* SendSigningKey;
	BYTE* RecvSigningKey;
	BYTE* SendSealingKey;
	BYTE* RecvSealingKey;
	UINT32 NegotiateFlags;
	BOOL UseSamFileDatabase;
	int LmCompatibilityLevel;
	int SuppressExtendedProtection;
	BOOL SendWorkstationName;
	UNICODE_STRING Workstation;
	UNICODE_STRING ServicePrincipalName;
	SSPI_CREDENTIALS* credentials;
	BYTE* ChannelBindingToken;
	BYTE ChannelBindingsHash[16];
	SecPkgContext_Bindings Bindings;
	BOOL SendSingleHostData;
	BOOL NegotiateKeyExchange;
	NTLM_SINGLE_HOST_DATA SingleHostData;
	NTLM_NEGOTIATE_MESSAGE NEGOTIATE_MESSAGE;
	NTLM_CHALLENGE_MESSAGE CHALLENGE_MESSAGE;
	NTLM_AUTHENTICATE_MESSAGE AUTHENTICATE_MESSAGE;
	size_t MessageIntegrityCheckOffset;
	SecBuffer NegotiateMessage;
	SecBuffer ChallengeMessage;
	SecBuffer AuthenticateMessage;
	SecBuffer ChallengeTargetInfo;
	SecBuffer AuthenticateTargetInfo;
	SecBuffer TargetName;
	SecBuffer NtChallengeResponse;
	SecBuffer LmChallengeResponse;
	NTLMv2_RESPONSE NTLMv2Response;
	BYTE NtProofString[16];
	BYTE Timestamp[8];
	BYTE ChallengeTimestamp[8];
	BYTE ServerChallenge[8];
	BYTE ClientChallenge[8];
	BYTE SessionBaseKey[16];
	BYTE KeyExchangeKey[16];
	BYTE RandomSessionKey[16];
	BYTE ExportedSessionKey[16];
	BYTE EncryptedRandomSessionKey[16];
	BYTE ClientSigningKey[16];
	BYTE ClientSealingKey[16];
	BYTE ServerSigningKey[16];
	BYTE ServerSealingKey[16];
	psSspiNtlmHashCallback HashCallback;
	void* HashCallbackArg;
} NTLM_CONTEXT;

char* ntlm_negotiate_flags_string(char* buffer, size_t size, UINT32 flags);
const char* ntlm_message_type_string(UINT32 messageType);

const char* ntlm_state_string(NTLM_STATE state);
void ntlm_change_state(NTLM_CONTEXT* ntlm, NTLM_STATE state);
NTLM_STATE ntlm_get_state(NTLM_CONTEXT* ntlm);
BOOL ntlm_reset_cipher_state(PSecHandle phContext);

SECURITY_STATUS ntlm_computeProofValue(NTLM_CONTEXT* ntlm, SecBuffer* ntproof);
SECURITY_STATUS ntlm_computeMicValue(NTLM_CONTEXT* ntlm, SecBuffer* micvalue);

#ifdef WITH_DEBUG_NLA
#define WITH_DEBUG_NTLM
#endif

BOOL NTLM_init(void);

WINPR_ATTR_MALLOC(free, 1)
char* get_computer_name(COMPUTER_NAME_FORMAT type, size_t* pSize);

#endif /* WINPR_SSPI_NTLM_PRIVATE_H */
