1/*
2 *   fs/cifs/ntlmssp.h
3 *
4 *   Copyright (c) International Business Machines  Corp., 2002,2006
5 *   Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 *   This library is free software; you can redistribute it and/or modify
8 *   it under the terms of the GNU Lesser General Public License as published
9 *   by the Free Software Foundation; either version 2.1 of the License, or
10 *   (at your option) any later version.
11 *
12 *   This library is distributed in the hope that it will be useful,
13 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
15 *   the GNU Lesser General Public License for more details.
16 *
17 *   You should have received a copy of the GNU Lesser General Public License
18 *   along with this library; if not, write to the Free Software
19 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#define NTLMSSP_SIGNATURE "NTLMSSP"
23/* Message Types */
24#define NtLmNegotiate     cpu_to_le32(1)
25#define NtLmChallenge     cpu_to_le32(2)
26#define NtLmAuthenticate  cpu_to_le32(3)
27#define UnknownMessage    cpu_to_le32(8)
28
29/* Negotiate Flags */
30#define NTLMSSP_NEGOTIATE_UNICODE       0x01	// Text strings are in unicode
31#define NTLMSSP_NEGOTIATE_OEM           0x02	// Text strings are in OEM
32#define NTLMSSP_REQUEST_TARGET          0x04	// Server return its auth realm
33#define NTLMSSP_NEGOTIATE_SIGN        0x0010	// Request signature capability
34#define NTLMSSP_NEGOTIATE_SEAL        0x0020	// Request confidentiality
35#define NTLMSSP_NEGOTIATE_DGRAM       0x0040
36#define NTLMSSP_NEGOTIATE_LM_KEY      0x0080 // Use LM session key for sign/seal
37#define NTLMSSP_NEGOTIATE_NTLM        0x0200	// NTLM authentication
38#define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x1000
39#define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x2000
40#define NTLMSSP_NEGOTIATE_LOCAL_CALL  0x4000	// client/server on same machine
41#define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x8000	// Sign for all security levels
42#define NTLMSSP_TARGET_TYPE_DOMAIN   0x10000
43#define NTLMSSP_TARGET_TYPE_SERVER   0x20000
44#define NTLMSSP_TARGET_TYPE_SHARE    0x40000
45#define NTLMSSP_NEGOTIATE_NTLMV2     0x80000
46#define NTLMSSP_REQUEST_INIT_RESP   0x100000
47#define NTLMSSP_REQUEST_ACCEPT_RESP 0x200000
48#define NTLMSSP_REQUEST_NOT_NT_KEY  0x400000
49#define NTLMSSP_NEGOTIATE_TARGET_INFO 0x800000
50#define NTLMSSP_NEGOTIATE_128     0x20000000
51#define NTLMSSP_NEGOTIATE_KEY_XCH 0x40000000
52#define NTLMSSP_NEGOTIATE_56      0x80000000
53
54/* Although typedefs are not commonly used for structure definitions */
55/* in the Linux kernel, in this particular case they are useful      */
56/* to more closely match the standards document for NTLMSSP from     */
57/* OpenGroup and to make the code more closely match the standard in */
58/* appearance */
59
60typedef struct _SECURITY_BUFFER {
61	__le16 Length;
62	__le16 MaximumLength;
63	__le32 Buffer;		/* offset to buffer */
64} __attribute__((packed)) SECURITY_BUFFER;
65
66typedef struct _NEGOTIATE_MESSAGE {
67	__u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
68	__le32 MessageType;     /* 1 */
69	__le32 NegotiateFlags;
70	SECURITY_BUFFER DomainName;	/* RFC 1001 style and ASCII */
71	SECURITY_BUFFER WorkstationName;	/* RFC 1001 and ASCII */
72	char DomainString[0];
73	/* followed by WorkstationString */
74} __attribute__((packed)) NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE;
75
76typedef struct _CHALLENGE_MESSAGE {
77	__u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
78	__le32 MessageType;   /* 2 */
79	SECURITY_BUFFER TargetName;
80	__le32 NegotiateFlags;
81	__u8 Challenge[CIFS_CRYPTO_KEY_SIZE];
82	__u8 Reserved[8];
83	SECURITY_BUFFER TargetInfoArray;
84} __attribute__((packed)) CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;
85
86typedef struct _AUTHENTICATE_MESSAGE {
87	__u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
88	__le32 MessageType;  /* 3 */
89	SECURITY_BUFFER LmChallengeResponse;
90	SECURITY_BUFFER NtChallengeResponse;
91	SECURITY_BUFFER DomainName;
92	SECURITY_BUFFER UserName;
93	SECURITY_BUFFER WorkstationName;
94	SECURITY_BUFFER SessionKey;
95	__le32 NegotiateFlags;
96	char UserString[0];
97} __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;
98