source: vendor/current/source3/auth/auth_winbind.c

Last change on this file was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 5.1 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 Winbind authentication mechnism
5
6 Copyright (C) Tim Potter 2000
7 Copyright (C) Andrew Bartlett 2001 - 2002
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 "includes.h"
24#include "auth.h"
25#include "nsswitch/libwbclient/wbclient.h"
26
27#undef DBGC_CLASS
28#define DBGC_CLASS DBGC_AUTH
29
30/* Authenticate a user with a challenge/response */
31
32static NTSTATUS check_winbind_security(const struct auth_context *auth_context,
33 void *my_private_data,
34 TALLOC_CTX *mem_ctx,
35 const struct auth_usersupplied_info *user_info,
36 struct auth_serversupplied_info **server_info)
37{
38 NTSTATUS nt_status;
39 wbcErr wbc_status;
40 struct wbcAuthUserParams params;
41 struct wbcAuthUserInfo *info = NULL;
42 struct wbcAuthErrorInfo *err = NULL;
43
44 ZERO_STRUCT(params);
45
46 if (!user_info) {
47 return NT_STATUS_INVALID_PARAMETER;
48 }
49
50 DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
51
52 if (!auth_context) {
53 DEBUG(3,("Password for user %s cannot be checked because we have no auth_info to get the challenge from.\n",
54 user_info->mapped.account_name));
55 return NT_STATUS_INVALID_PARAMETER;
56 }
57
58 if (strequal(user_info->mapped.domain_name, get_global_sam_name())) {
59 DEBUG(3,("check_winbind_security: Not using winbind, requested domain [%s] was for this SAM.\n",
60 user_info->mapped.domain_name));
61 return NT_STATUS_NOT_IMPLEMENTED;
62 }
63
64 /* Send off request */
65 params.account_name = user_info->client.account_name;
66 /*
67 * We need to send the domain name from the client to the DC. With
68 * NTLMv2 the domain name is part of the hashed second challenge,
69 * if we change the domain name, the DC will fail to verify the
70 * challenge cause we changed the domain name, this is like a
71 * man in the middle attack.
72 */
73 params.domain_name = user_info->client.domain_name;
74 params.workstation_name = user_info->workstation_name;
75
76 params.flags = 0;
77 params.parameter_control= user_info->logon_parameters;
78
79 params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
80
81 memcpy(params.password.response.challenge,
82 auth_context->challenge.data,
83 sizeof(params.password.response.challenge));
84
85 if (user_info->password.response.nt.length != 0) {
86 params.password.response.nt_length =
87 user_info->password.response.nt.length;
88 params.password.response.nt_data =
89 user_info->password.response.nt.data;
90 }
91 if (user_info->password.response.lanman.length != 0) {
92 params.password.response.lm_length =
93 user_info->password.response.lanman.length;
94 params.password.response.lm_data =
95 user_info->password.response.lanman.data;
96 }
97
98 /* we are contacting the privileged pipe */
99 become_root();
100 wbc_status = wbcAuthenticateUserEx(&params, &info, &err);
101 unbecome_root();
102
103 if (!WBC_ERROR_IS_OK(wbc_status)) {
104 DEBUG(10,("check_winbind_security: wbcAuthenticateUserEx failed: %s\n",
105 wbcErrorString(wbc_status)));
106 }
107
108 if (wbc_status == WBC_ERR_NO_MEMORY) {
109 return NT_STATUS_NO_MEMORY;
110 }
111
112 if (wbc_status == WBC_ERR_WINBIND_NOT_AVAILABLE) {
113 struct auth_methods *auth_method =
114 (struct auth_methods *)my_private_data;
115
116 if ( auth_method )
117 return auth_method->auth(auth_context, auth_method->private_data,
118 mem_ctx, user_info, server_info);
119 return NT_STATUS_LOGON_FAILURE;
120 }
121
122 if (wbc_status == WBC_ERR_AUTH_ERROR) {
123 nt_status = NT_STATUS(err->nt_status);
124 wbcFreeMemory(err);
125 return nt_status;
126 }
127
128 if (!WBC_ERROR_IS_OK(wbc_status)) {
129 return NT_STATUS_LOGON_FAILURE;
130 }
131
132 nt_status = make_server_info_wbcAuthUserInfo(mem_ctx,
133 user_info->client.account_name,
134 user_info->mapped.domain_name,
135 info, server_info);
136 wbcFreeMemory(info);
137 if (!NT_STATUS_IS_OK(nt_status)) {
138 return nt_status;
139 }
140
141 (*server_info)->nss_token |= user_info->was_mapped;
142
143 return nt_status;
144}
145
146/* module initialisation */
147static NTSTATUS auth_init_winbind(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
148{
149 struct auth_methods *result;
150
151 result = talloc_zero(auth_context, struct auth_methods);
152 if (result == NULL) {
153 return NT_STATUS_NO_MEMORY;
154 }
155 result->name = "winbind";
156 result->auth = check_winbind_security;
157
158 if (param && *param) {
159 /* we load the 'fallback' module - if winbind isn't here, call this
160 module */
161 auth_methods *priv;
162 if (!load_auth_module(auth_context, param, &priv)) {
163 return NT_STATUS_UNSUCCESSFUL;
164 }
165 result->private_data = (void *)priv;
166 }
167
168 *auth_method = result;
169 return NT_STATUS_OK;
170}
171
172NTSTATUS auth_winbind_init(void)
173{
174 return smb_register_auth(AUTH_INTERFACE_VERSION, "winbind", auth_init_winbind);
175}
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