1 /* SPDX-License-Identifier: LGPL-2.1+ */
2 /*
3 * Copyright (c) International Business Machines Corp., 2002,2007
4 * Author(s): Steve French (sfrench@us.ibm.com)
5 */
6
7 #ifndef __KSMBD_NTLMSSP_H
8 #define __KSMBD_NTLMSSP_H
9
10 #define NTLMSSP_SIGNATURE "NTLMSSP"
11
12 /* Security blob target info data */
13 #define TGT_Name "KSMBD"
14
15 /*
16 * Size of the crypto key returned on the negotiate SMB in bytes
17 */
18 #define CIFS_CRYPTO_KEY_SIZE (8)
19 #define CIFS_KEY_SIZE (40)
20
21 /*
22 * Size of encrypted user password in bytes
23 */
24 #define CIFS_ENCPWD_SIZE (16)
25 #define CIFS_CPHTXT_SIZE (16)
26
27 /* Message Types */
28 #define NtLmNegotiate cpu_to_le32(1)
29 #define NtLmChallenge cpu_to_le32(2)
30 #define NtLmAuthenticate cpu_to_le32(3)
31 #define UnknownMessage cpu_to_le32(8)
32
33 /* Negotiate Flags */
34 #define NTLMSSP_NEGOTIATE_UNICODE 0x01 /* Text strings are unicode */
35 #define NTLMSSP_NEGOTIATE_OEM 0x02 /* Text strings are in OEM */
36 #define NTLMSSP_REQUEST_TARGET 0x04 /* Srv returns its auth realm */
37 /* define reserved9 0x08 */
38 #define NTLMSSP_NEGOTIATE_SIGN 0x0010 /* Request signing capability */
39 #define NTLMSSP_NEGOTIATE_SEAL 0x0020 /* Request confidentiality */
40 #define NTLMSSP_NEGOTIATE_DGRAM 0x0040
41 #define NTLMSSP_NEGOTIATE_LM_KEY 0x0080 /* Use LM session key */
42 /* defined reserved 8 0x0100 */
43 #define NTLMSSP_NEGOTIATE_NTLM 0x0200 /* NTLM authentication */
44 #define NTLMSSP_NEGOTIATE_NT_ONLY 0x0400 /* Lanman not allowed */
45 #define NTLMSSP_ANONYMOUS 0x0800
46 #define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x1000 /* reserved6 */
47 #define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x2000
48 #define NTLMSSP_NEGOTIATE_LOCAL_CALL 0x4000 /* client/server same machine */
49 #define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x8000 /* Sign. All security levels */
50 #define NTLMSSP_TARGET_TYPE_DOMAIN 0x10000
51 #define NTLMSSP_TARGET_TYPE_SERVER 0x20000
52 #define NTLMSSP_TARGET_TYPE_SHARE 0x40000
53 #define NTLMSSP_NEGOTIATE_EXTENDED_SEC 0x80000 /* NB:not related to NTLMv2 pwd*/
54 /* #define NTLMSSP_REQUEST_INIT_RESP 0x100000 */
55 #define NTLMSSP_NEGOTIATE_IDENTIFY 0x100000
56 #define NTLMSSP_REQUEST_ACCEPT_RESP 0x200000 /* reserved5 */
57 #define NTLMSSP_REQUEST_NON_NT_KEY 0x400000
58 #define NTLMSSP_NEGOTIATE_TARGET_INFO 0x800000
59 /* #define reserved4 0x1000000 */
60 #define NTLMSSP_NEGOTIATE_VERSION 0x2000000 /* we do not set */
61 /* #define reserved3 0x4000000 */
62 /* #define reserved2 0x8000000 */
63 /* #define reserved1 0x10000000 */
64 #define NTLMSSP_NEGOTIATE_128 0x20000000
65 #define NTLMSSP_NEGOTIATE_KEY_XCH 0x40000000
66 #define NTLMSSP_NEGOTIATE_56 0x80000000
67
68 /* Define AV Pair Field IDs */
69 enum av_field_type {
70 NTLMSSP_AV_EOL = 0,
71 NTLMSSP_AV_NB_COMPUTER_NAME,
72 NTLMSSP_AV_NB_DOMAIN_NAME,
73 NTLMSSP_AV_DNS_COMPUTER_NAME,
74 NTLMSSP_AV_DNS_DOMAIN_NAME,
75 NTLMSSP_AV_DNS_TREE_NAME,
76 NTLMSSP_AV_FLAGS,
77 NTLMSSP_AV_TIMESTAMP,
78 NTLMSSP_AV_RESTRICTION,
79 NTLMSSP_AV_TARGET_NAME,
80 NTLMSSP_AV_CHANNEL_BINDINGS
81 };
82
83 /* Although typedefs are not commonly used for structure definitions */
84 /* in the Linux kernel, in this particular case they are useful */
85 /* to more closely match the standards document for NTLMSSP from */
86 /* OpenGroup and to make the code more closely match the standard in */
87 /* appearance */
88
89 struct security_buffer {
90 __le16 Length;
91 __le16 MaximumLength;
92 __le32 BufferOffset; /* offset to buffer */
93 } __packed;
94
95 struct target_info {
96 __le16 Type;
97 __le16 Length;
98 __u8 Content[];
99 } __packed;
100
101 struct negotiate_message {
102 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
103 __le32 MessageType; /* NtLmNegotiate = 1 */
104 __le32 NegotiateFlags;
105 struct security_buffer DomainName; /* RFC 1001 style and ASCII */
106 struct security_buffer WorkstationName; /* RFC 1001 and ASCII */
107 /*
108 * struct security_buffer for version info not present since we
109 * do not set the version is present flag
110 */
111 char DomainString[];
112 /* followed by WorkstationString */
113 } __packed;
114
115 struct challenge_message {
116 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
117 __le32 MessageType; /* NtLmChallenge = 2 */
118 struct security_buffer TargetName;
119 __le32 NegotiateFlags;
120 __u8 Challenge[CIFS_CRYPTO_KEY_SIZE];
121 __u8 Reserved[8];
122 struct security_buffer TargetInfoArray;
123 /*
124 * struct security_buffer for version info not present since we
125 * do not set the version is present flag
126 */
127 } __packed;
128
129 struct authenticate_message {
130 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
131 __le32 MessageType; /* NtLmsAuthenticate = 3 */
132 struct security_buffer LmChallengeResponse;
133 struct security_buffer NtChallengeResponse;
134 struct security_buffer DomainName;
135 struct security_buffer UserName;
136 struct security_buffer WorkstationName;
137 struct security_buffer SessionKey;
138 __le32 NegotiateFlags;
139 /*
140 * struct security_buffer for version info not present since we
141 * do not set the version is present flag
142 */
143 char UserString[];
144 } __packed;
145
146 struct ntlmv2_resp {
147 char ntlmv2_hash[CIFS_ENCPWD_SIZE];
148 __le32 blob_signature;
149 __u32 reserved;
150 __le64 time;
151 __u64 client_chal; /* random */
152 __u32 reserved2;
153 /* array of name entries could follow ending in minimum 4 byte struct */
154 } __packed;
155
156 /* per smb session structure/fields */
157 struct ntlmssp_auth {
158 /* whether session key is per smb session */
159 bool sesskey_per_smbsess;
160 /* sent by client in type 1 ntlmsssp exchange */
161 __u32 client_flags;
162 /* sent by server in type 2 ntlmssp exchange */
163 __u32 conn_flags;
164 /* sent to server */
165 unsigned char ciphertext[CIFS_CPHTXT_SIZE];
166 /* used by ntlmssp */
167 char cryptkey[CIFS_CRYPTO_KEY_SIZE];
168 };
169 #endif /* __KSMBD_NTLMSSP_H */
170
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