source: trunk/server/libcli/auth/ntlmssp.h@ 971

Last change on this file since 971 was 920, checked in by Silvan Scherrer, 9 years ago

Samba Server: apply latest security patches to trunk
File size: 5.6 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 SMB parameters and setup
4 Copyright (C) Andrew Tridgell 1992-1997
5 Copyright (C) Luke Kenneth Casson Leighton 1996-1997
6 Copyright (C) Paul Ashton 1997
7 Copyright (C) Andrew Bartlett 2010
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21*/
22
23#include "../librpc/gen_ndr/ntlmssp.h"
24
25/* NTLMSSP mode */
26enum ntlmssp_role
27{
28 NTLMSSP_SERVER,
29 NTLMSSP_CLIENT
30};
31
32/* NTLMSSP message types */
33enum ntlmssp_message_type
34{
35 NTLMSSP_INITIAL = 0 /* samba internal state */,
36 NTLMSSP_NEGOTIATE = 1,
37 NTLMSSP_CHALLENGE = 2,
38 NTLMSSP_AUTH = 3,
39 NTLMSSP_UNKNOWN = 4,
40 NTLMSSP_DONE = 5 /* samba final state */
41};
42
43#define NTLMSSP_FEATURE_SESSION_KEY 0x00000001
44#define NTLMSSP_FEATURE_SIGN 0x00000002
45#define NTLMSSP_FEATURE_SEAL 0x00000004
46#define NTLMSSP_FEATURE_CCACHE 0x00000008
47
48union ntlmssp_crypt_state;
49
50struct ntlmssp_state
51{
52 enum ntlmssp_role role;
53 uint32_t expected_state;
54
55 bool unicode;
56 bool use_ntlmv2;
57 bool use_ccache;
58 bool use_nt_response; /* Set to 'False' to debug what happens when the NT response is omited */
59 bool allow_lm_key; /* The LM_KEY code is not very secure... */
60
61 const char *user;
62 const char *domain;
63 uint8_t *nt_hash;
64 uint8_t *lm_hash;
65
66 struct {
67 const char *netbios_name;
68 const char *netbios_domain;
69 } client;
70
71 struct {
72 bool is_standalone;
73 const char *netbios_name;
74 const char *netbios_domain;
75 const char *dns_name;
76 const char *dns_domain;
77 } server;
78
79 DATA_BLOB internal_chal; /* Random challenge as supplied to the client for NTLM authentication */
80
81 DATA_BLOB chal; /* Random challenge as input into the actual NTLM (or NTLM2) authentication */
82 DATA_BLOB lm_resp;
83 DATA_BLOB nt_resp;
84 DATA_BLOB session_key;
85
86 uint32_t required_flags;
87 uint32_t neg_flags; /* the current state of negotiation with the NTLMSSP partner */
88
89 /**
90 * Private data for the callback functions
91 */
92 void *callback_private;
93
94 /**
95 * Callback to get the 'challenge' used for NTLM authentication.
96 *
97 * @param ntlmssp_state This structure
98 * @return 8 bytes of challenge data, determined by the server to be the challenge for NTLM authentication
99 *
100 */
101 NTSTATUS (*get_challenge)(const struct ntlmssp_state *ntlmssp_state,
102 uint8_t challenge[8]);
103
104 /**
105 * Callback to find if the challenge used by NTLM authentication may be modified
106 *
107 * The NTLM2 authentication scheme modifies the effective challenge, but this is not compatiable with the
108 * current 'security=server' implementation..
109 *
110 * @param ntlmssp_state This structure
111 * @return Can the challenge be set to arbitary values?
112 *
113 */
114 bool (*may_set_challenge)(const struct ntlmssp_state *ntlmssp_state);
115
116 /**
117 * Callback to set the 'challenge' used for NTLM authentication.
118 *
119 * The callback may use the void *auth_context to store state information, but the same value is always available
120 * from the DATA_BLOB chal on this structure.
121 *
122 * @param ntlmssp_state This structure
123 * @param challenge 8 bytes of data, agreed by the client and server to be the effective challenge for NTLM2 authentication
124 *
125 */
126 NTSTATUS (*set_challenge)(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge);
127
128 /**
129 * Callback to check the user's password.
130 *
131 * The callback must reads the feilds of this structure for the information it needs on the user
132 * @param ntlmssp_state This structure
133 * @param mem_ctx Talloc context for LM and NT session key to be returned on
134 * @param nt_session_key If an NT session key is returned by the authentication process, return it here
135 * @param lm_session_key If an LM session key is returned by the authentication process, return it here
136 *
137 */
138 NTSTATUS (*check_password)(struct ntlmssp_state *ntlmssp_state, TALLOC_CTX *mem_ctx,
139 DATA_BLOB *nt_session_key, DATA_BLOB *lm_session_key);
140
141 union ntlmssp_crypt_state *crypt;
142};
143
144/* The following definitions come from libcli/auth/ntlmssp_sign.c */
145
146NTSTATUS ntlmssp_sign_packet(struct ntlmssp_state *ntlmssp_state,
147 TALLOC_CTX *sig_mem_ctx,
148 const uint8_t *data, size_t length,
149 const uint8_t *whole_pdu, size_t pdu_length,
150 DATA_BLOB *sig);
151NTSTATUS ntlmssp_check_packet(struct ntlmssp_state *ntlmssp_state,
152 const uint8_t *data, size_t length,
153 const uint8_t *whole_pdu, size_t pdu_length,
154 const DATA_BLOB *sig) ;
155NTSTATUS ntlmssp_seal_packet(struct ntlmssp_state *ntlmssp_state,
156 TALLOC_CTX *sig_mem_ctx,
157 uint8_t *data, size_t length,
158 const uint8_t *whole_pdu, size_t pdu_length,
159 DATA_BLOB *sig);
160NTSTATUS ntlmssp_unseal_packet(struct ntlmssp_state *ntlmssp_state,
161 uint8_t *data, size_t length,
162 const uint8_t *whole_pdu, size_t pdu_length,
163 const DATA_BLOB *sig);
164NTSTATUS ntlmssp_wrap(struct ntlmssp_state *ntlmssp_state,
165 TALLOC_CTX *out_mem_ctx,
166 const DATA_BLOB *in,
167 DATA_BLOB *out);
168NTSTATUS ntlmssp_unwrap(struct ntlmssp_state *ntlmssp_stae,
169 TALLOC_CTX *out_mem_ctx,
170 const DATA_BLOB *in,
171 DATA_BLOB *out);
172NTSTATUS ntlmssp_sign_init(struct ntlmssp_state *ntlmssp_state);
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