1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/* SPDX-License-Identifier: LGPL-2.1+ */
/*
* Copyright (c) International Business Machines Corp., 2002,2007
* Author(s): Steve French (sfrench@us.ibm.com)
*/
#ifndef __KSMBD_NTLMSSP_H
#define __KSMBD_NTLMSSP_H
#define NTLMSSP_SIGNATURE "NTLMSSP"
/* Security blob target info data */
#define TGT_Name "KSMBD"
/*
* Size of the crypto key returned on the negotiate SMB in bytes
*/
#define CIFS_CRYPTO_KEY_SIZE (8)
#define CIFS_KEY_SIZE (40)
/*
* Size of encrypted user password in bytes
*/
#define CIFS_ENCPWD_SIZE (16)
#define CIFS_CPHTXT_SIZE (16)
/* Message Types */
#define NtLmNegotiate cpu_to_le32(1)
#define NtLmChallenge cpu_to_le32(2)
#define NtLmAuthenticate cpu_to_le32(3)
#define UnknownMessage cpu_to_le32(8)
/* Negotiate Flags */
#define NTLMSSP_NEGOTIATE_UNICODE 0x01 /* Text strings are unicode */
#define NTLMSSP_NEGOTIATE_OEM 0x02 /* Text strings are in OEM */
#define NTLMSSP_REQUEST_TARGET 0x04 /* Srv returns its auth realm */
/* define reserved9 0x08 */
#define NTLMSSP_NEGOTIATE_SIGN 0x0010 /* Request signing capability */
#define NTLMSSP_NEGOTIATE_SEAL 0x0020 /* Request confidentiality */
#define NTLMSSP_NEGOTIATE_DGRAM 0x0040
#define NTLMSSP_NEGOTIATE_LM_KEY 0x0080 /* Use LM session key */
/* defined reserved 8 0x0100 */
#define NTLMSSP_NEGOTIATE_NTLM 0x0200 /* NTLM authentication */
#define NTLMSSP_NEGOTIATE_NT_ONLY 0x0400 /* Lanman not allowed */
#define NTLMSSP_ANONYMOUS 0x0800
#define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x1000 /* reserved6 */
#define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x2000
#define NTLMSSP_NEGOTIATE_LOCAL_CALL 0x4000 /* client/server same machine */
#define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x8000 /* Sign. All security levels */
#define NTLMSSP_TARGET_TYPE_DOMAIN 0x10000
#define NTLMSSP_TARGET_TYPE_SERVER 0x20000
#define NTLMSSP_TARGET_TYPE_SHARE 0x40000
#define NTLMSSP_NEGOTIATE_EXTENDED_SEC 0x80000 /* NB:not related to NTLMv2 pwd*/
/* #define NTLMSSP_REQUEST_INIT_RESP 0x100000 */
#define NTLMSSP_NEGOTIATE_IDENTIFY 0x100000
#define NTLMSSP_REQUEST_ACCEPT_RESP 0x200000 /* reserved5 */
#define NTLMSSP_REQUEST_NON_NT_KEY 0x400000
#define NTLMSSP_NEGOTIATE_TARGET_INFO 0x800000
/* #define reserved4 0x1000000 */
#define NTLMSSP_NEGOTIATE_VERSION 0x2000000 /* we do not set */
/* #define reserved3 0x4000000 */
/* #define reserved2 0x8000000 */
/* #define reserved1 0x10000000 */
#define NTLMSSP_NEGOTIATE_128 0x20000000
#define NTLMSSP_NEGOTIATE_KEY_XCH 0x40000000
#define NTLMSSP_NEGOTIATE_56 0x80000000
/* Define AV Pair Field IDs */
enum av_field_type {
NTLMSSP_AV_EOL = 0,
NTLMSSP_AV_NB_COMPUTER_NAME,
NTLMSSP_AV_NB_DOMAIN_NAME,
NTLMSSP_AV_DNS_COMPUTER_NAME,
NTLMSSP_AV_DNS_DOMAIN_NAME,
NTLMSSP_AV_DNS_TREE_NAME,
NTLMSSP_AV_FLAGS,
NTLMSSP_AV_TIMESTAMP,
NTLMSSP_AV_RESTRICTION,
NTLMSSP_AV_TARGET_NAME,
NTLMSSP_AV_CHANNEL_BINDINGS
};
/* Although typedefs are not commonly used for structure definitions */
/* in the Linux kernel, in this particular case they are useful */
/* to more closely match the standards document for NTLMSSP from */
/* OpenGroup and to make the code more closely match the standard in */
/* appearance */
struct security_buffer {
__le16 Length;
__le16 MaximumLength;
__le32 BufferOffset; /* offset to buffer */
} __packed;
struct target_info {
__le16 Type;
__le16 Length;
__u8 Content[0];
} __packed;
struct negotiate_message {
__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
__le32 MessageType; /* NtLmNegotiate = 1 */
__le32 NegotiateFlags;
struct security_buffer DomainName; /* RFC 1001 style and ASCII */
struct security_buffer WorkstationName; /* RFC 1001 and ASCII */
/*
* struct security_buffer for version info not present since we
* do not set the version is present flag
*/
char DomainString[0];
/* followed by WorkstationString */
} __packed;
struct challenge_message {
__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
__le32 MessageType; /* NtLmChallenge = 2 */
struct security_buffer TargetName;
__le32 NegotiateFlags;
__u8 Challenge[CIFS_CRYPTO_KEY_SIZE];
__u8 Reserved[8];
struct security_buffer TargetInfoArray;
/*
* struct security_buffer for version info not present since we
* do not set the version is present flag
*/
} __packed;
struct authenticate_message {
__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
__le32 MessageType; /* NtLmsAuthenticate = 3 */
struct security_buffer LmChallengeResponse;
struct security_buffer NtChallengeResponse;
struct security_buffer DomainName;
struct security_buffer UserName;
struct security_buffer WorkstationName;
struct security_buffer SessionKey;
__le32 NegotiateFlags;
/*
* struct security_buffer for version info not present since we
* do not set the version is present flag
*/
char UserString[0];
} __packed;
struct ntlmv2_resp {
char ntlmv2_hash[CIFS_ENCPWD_SIZE];
__le32 blob_signature;
__u32 reserved;
__le64 time;
__u64 client_chal; /* random */
__u32 reserved2;
/* array of name entries could follow ending in minimum 4 byte struct */
} __packed;
/* per smb session structure/fields */
struct ntlmssp_auth {
/* whether session key is per smb session */
bool sesskey_per_smbsess;
/* sent by client in type 1 ntlmsssp exchange */
__u32 client_flags;
/* sent by server in type 2 ntlmssp exchange */
__u32 conn_flags;
/* sent to server */
unsigned char ciphertext[CIFS_CPHTXT_SIZE];
/* used by ntlmssp */
char cryptkey[CIFS_CRYPTO_KEY_SIZE];
};
#endif /* __KSMBD_NTLMSSP_H */
|
