summaryrefslogtreecommitdiff
path: root/source3/auth/auth_ntlmssp.c
blob: 582c8dc591abb1c4139994ef257a59fd90a93cae (plain)
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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
/* 
   Unix SMB/Netbios implementation.
   Version 3.0
   handle NLTMSSP, server side

   Copyright (C) Andrew Tridgell      2001
   Copyright (C) Andrew Bartlett 2001-2005,2011
   Copyright (C) Stefan Metzmacher 2005

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "auth.h"

NTSTATUS auth3_generate_session_info(struct auth4_context *auth_context,
				     TALLOC_CTX *mem_ctx,
				     void *server_returned_info,
				     const char *original_user_name,
				     uint32_t session_info_flags,
				     struct auth_session_info **session_info)
{
	struct auth_serversupplied_info *server_info = talloc_get_type_abort(server_returned_info,
									     struct auth_serversupplied_info);
	NTSTATUS nt_status;

	nt_status = create_local_token(mem_ctx,
				       server_info,
				       NULL,
				       original_user_name,
				       session_info);
	if (!NT_STATUS_IS_OK(nt_status)) {
		DEBUG(10, ("create_local_token failed: %s\n",
			   nt_errstr(nt_status)));
		return nt_status;
	}

	return NT_STATUS_OK;
}

/**
 * Return the challenge as determined by the authentication subsystem 
 * @return an 8 byte random challenge
 */

NTSTATUS auth3_get_challenge(struct auth4_context *auth4_context,
					   uint8_t chal[8])
{
	struct auth_context *auth_context = talloc_get_type_abort(auth4_context->private_data,
								  struct auth_context);
	auth_context->get_ntlm_challenge(auth_context, chal);
	return NT_STATUS_OK;
}

/**
 * Some authentication methods 'fix' the challenge, so we may not be able to set it
 *
 * @return If the effective challenge used by the auth subsystem may be modified
 */
bool auth3_may_set_challenge(struct auth4_context *auth4_context)
{
	struct auth_context *auth_context = talloc_get_type_abort(auth4_context->private_data,
								  struct auth_context);
	return auth_context->challenge_may_be_modified;
}

/**
 * NTLM2 authentication modifies the effective challenge, 
 * @param challenge The new challenge value
 */
NTSTATUS auth3_set_challenge(struct auth4_context *auth4_context, const uint8_t *chal,
			     const char *challenge_set_by)
{
	struct auth_context *auth_context = talloc_get_type_abort(auth4_context->private_data,
								  struct auth_context);

	auth_context->challenge = data_blob_talloc(auth_context,
						   chal, 8);
	NT_STATUS_HAVE_NO_MEMORY(auth_context->challenge.data);

	auth_context->challenge_set_by = talloc_strdup(auth_context, challenge_set_by);
	NT_STATUS_HAVE_NO_MEMORY(auth_context->challenge_set_by);

	DEBUG(5, ("auth_context challenge set by %s\n", auth_context->challenge_set_by));
	DEBUG(5, ("challenge is: \n"));
	dump_data(5, auth_context->challenge.data, auth_context->challenge.length);
	return NT_STATUS_OK;
}

/**
 * Check the password on an NTLMSSP login.  
 *
 * Return the session keys used on the connection.
 */

NTSTATUS auth3_check_password(struct auth4_context *auth4_context,
			      TALLOC_CTX *mem_ctx,
			      const struct auth_usersupplied_info *user_info,
			      void **server_returned_info,
			      DATA_BLOB *session_key, DATA_BLOB *lm_session_key)
{
	struct auth_context *auth_context = talloc_get_type_abort(auth4_context->private_data,
								  struct auth_context);
	struct auth_usersupplied_info *mapped_user_info = NULL;
	struct auth_serversupplied_info *server_info;
	NTSTATUS nt_status;
	bool username_was_mapped;

	/* The client has given us its machine name (which we only get over NBT transport).
	   We need to possibly reload smb.conf if smb.conf includes depend on the machine name. */

	set_remote_machine_name(user_info->workstation_name, True);

	/* setup the string used by %U */
	/* sub_set_smb_name checks for weird internally */
	sub_set_smb_name(user_info->client.account_name);

	lp_load(get_dyn_CONFIGFILE(), false, false, true, true);

	nt_status = make_user_info_map(&mapped_user_info,
				       user_info->client.account_name,
				       user_info->client.domain_name,
				       user_info->workstation_name,
				       user_info->remote_host,
	                               user_info->password.response.lanman.data ? &user_info->password.response.lanman : NULL,
	                               user_info->password.response.nt.data ? &user_info->password.response.nt : NULL,
				       NULL, NULL, NULL,
				       AUTH_PASSWORD_RESPONSE);

	if (!NT_STATUS_IS_OK(nt_status)) {
		return nt_status;
	}

	mapped_user_info->logon_parameters = user_info->logon_parameters;

	mapped_user_info->flags = user_info->flags;

	nt_status = auth_context->check_ntlm_password(auth_context,
						      mapped_user_info, &server_info);

	if (!NT_STATUS_IS_OK(nt_status)) {
		DEBUG(5,("Checking NTLMSSP password for %s\\%s failed: %s\n",
			 user_info->client.domain_name,
			 user_info->client.account_name,
			 nt_errstr(nt_status)));
	}

	username_was_mapped = mapped_user_info->was_mapped;

	free_user_info(&mapped_user_info);

	if (!NT_STATUS_IS_OK(nt_status)) {
		nt_status = do_map_to_guest_server_info(nt_status,
							&server_info,
							user_info->client.account_name,
							user_info->client.domain_name);
		*server_returned_info = talloc_steal(mem_ctx, server_info);
		return nt_status;
	}

	server_info->nss_token |= username_was_mapped;

	/* Clear out the session keys, and pass them to the caller.
	 * They will not be used in this form again - instead the
	 * NTLMSSP code will decide on the final correct session key,
	 * and supply it to create_local_token() */
	if (session_key) {
		DEBUG(10, ("Got NT session key of length %u\n",
			(unsigned int)server_info->session_key.length));
		*session_key = server_info->session_key;
		talloc_steal(mem_ctx, server_info->session_key.data);
		server_info->session_key = data_blob_null;
	}
	if (lm_session_key) {
		DEBUG(10, ("Got LM session key of length %u\n",
			(unsigned int)server_info->lm_session_key.length));
		*lm_session_key = server_info->lm_session_key;
		talloc_steal(mem_ctx, server_info->lm_session_key.data);
		server_info->lm_session_key = data_blob_null;
	}

	*server_returned_info = talloc_steal(mem_ctx, server_info);
	return nt_status;
}