source: vendor/current/source3/auth/auth_wbc.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: 5.9 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 Winbind client authentication mechanism designed to defer all
5 authentication to the winbind daemon.
6
7 Copyright (C) Tim Potter 2000
8 Copyright (C) Andrew Bartlett 2001 - 2002
9 Copyright (C) Dan Sledz 2009
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
23*/
24
25/* This auth module is very similar to auth_winbind with 3 distinct
26 * differences.
27 *
28 * 1) Does not fallback to another auth module if winbindd is unavailable
29 * 2) Does not validate the domain of the user
30 * 3) Handles unencrypted passwords
31 *
32 * The purpose of this module is to defer all authentication decisions (ie:
33 * local user vs NIS vs LDAP vs AD; encrypted vs plaintext) to the wbc
34 * compatible daemon. This centeralizes all authentication decisions to a
35 * single provider.
36 *
37 * This auth backend is most useful when used in conjunction with pdb_wbc_sam.
38 */
39
40#include "includes.h"
41#include "auth.h"
42#include "nsswitch/libwbclient/wbclient.h"
43
44#undef DBGC_CLASS
45#define DBGC_CLASS DBGC_AUTH
46
47/* Authenticate a user with a challenge/response */
48
49static NTSTATUS check_wbc_security(const struct auth_context *auth_context,
50 void *my_private_data,
51 TALLOC_CTX *mem_ctx,
52 const struct auth_usersupplied_info *user_info,
53 struct auth_serversupplied_info **server_info)
54{
55 NTSTATUS nt_status;
56 wbcErr wbc_status;
57 struct wbcAuthUserParams params;
58 struct wbcAuthUserInfo *info = NULL;
59 struct wbcAuthErrorInfo *err = NULL;
60
61 if (!user_info || !auth_context || !server_info) {
62 return NT_STATUS_INVALID_PARAMETER;
63 }
64
65 ZERO_STRUCT(params);
66
67 /* Send off request */
68
69 DEBUG(10, ("Check auth for: [%s]", user_info->mapped.account_name));
70
71 params.account_name = user_info->client.account_name;
72 params.domain_name = user_info->mapped.domain_name;
73 params.workstation_name = user_info->workstation_name;
74
75 params.flags = 0;
76 params.parameter_control= user_info->logon_parameters;
77
78 /* Handle plaintext */
79 switch (user_info->password_state) {
80 case AUTH_PASSWORD_PLAIN:
81 {
82 DEBUG(3,("Checking plaintext password for %s.\n",
83 user_info->mapped.account_name));
84 params.level = WBC_AUTH_USER_LEVEL_PLAIN;
85
86 params.password.plaintext = user_info->password.plaintext;
87 break;
88 }
89 case AUTH_PASSWORD_RESPONSE:
90 case AUTH_PASSWORD_HASH:
91 {
92 DEBUG(3,("Checking encrypted password for %s.\n",
93 user_info->mapped.account_name));
94 params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
95
96 memcpy(params.password.response.challenge,
97 auth_context->challenge.data,
98 sizeof(params.password.response.challenge));
99
100 if (user_info->password.response.nt.length != 0) {
101 params.password.response.nt_length =
102 user_info->password.response.nt.length;
103 params.password.response.nt_data =
104 user_info->password.response.nt.data;
105 }
106 if (user_info->password.response.lanman.length != 0) {
107 params.password.response.lm_length =
108 user_info->password.response.lanman.length;
109 params.password.response.lm_data =
110 user_info->password.response.lanman.data;
111 }
112 break;
113 }
114 default:
115 DEBUG(0,("user_info constructed for user '%s' was invalid - password_state=%u invalid.\n",user_info->mapped.account_name, user_info->password_state));
116 return NT_STATUS_INTERNAL_ERROR;
117#if 0 /* If ever implemented in libwbclient */
118 case AUTH_PASSWORD_HASH:
119 {
120 DEBUG(3,("Checking logon (hash) password for %s.\n",
121 user_info->mapped.account_name));
122 params.level = WBC_AUTH_USER_LEVEL_HASH;
123
124 if (user_info->password.hash.nt) {
125 memcpy(params.password.hash.nt_hash, user_info->password.hash.nt, sizeof(* user_info->password.hash.nt));
126 } else {
127 memset(params.password.hash.nt_hash, '\0', sizeof(params.password.hash.nt_hash));
128 }
129
130 if (user_info->password.hash.lanman) {
131 memcpy(params.password.hash.lm_hash, user_info->password.hash.lanman, sizeof(* user_info->password.hash.lanman));
132 } else {
133 memset(params.password.hash.lm_hash, '\0', sizeof(params.password.hash.lm_hash));
134 }
135
136 }
137#endif
138 }
139
140 /* we are contacting the privileged pipe */
141 become_root();
142 wbc_status = wbcAuthenticateUserEx(&params, &info, &err);
143 unbecome_root();
144
145 if (!WBC_ERROR_IS_OK(wbc_status)) {
146 DEBUG(10,("wbcAuthenticateUserEx failed (%d): %s\n",
147 wbc_status, wbcErrorString(wbc_status)));
148 }
149
150 if (wbc_status == WBC_ERR_NO_MEMORY) {
151 return NT_STATUS_NO_MEMORY;
152 }
153
154 if (wbc_status == WBC_ERR_AUTH_ERROR) {
155 nt_status = NT_STATUS(err->nt_status);
156 wbcFreeMemory(err);
157 return nt_status;
158 }
159
160 if (!WBC_ERROR_IS_OK(wbc_status)) {
161 return NT_STATUS_LOGON_FAILURE;
162 }
163
164 DEBUG(10,("wbcAuthenticateUserEx succeeded\n"));
165
166 nt_status = make_server_info_wbcAuthUserInfo(mem_ctx,
167 user_info->client.account_name,
168 user_info->mapped.domain_name,
169 info, server_info);
170 wbcFreeMemory(info);
171 if (!NT_STATUS_IS_OK(nt_status)) {
172 return nt_status;
173 }
174
175 (*server_info)->nss_token |= user_info->was_mapped;
176
177 return nt_status;
178}
179
180/* module initialisation */
181static NTSTATUS auth_init_wbc(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
182{
183 struct auth_methods *result;
184
185 result = talloc_zero(auth_context, struct auth_methods);
186 if (result == NULL) {
187 return NT_STATUS_NO_MEMORY;
188 }
189 result->name = "wbc";
190 result->auth = check_wbc_security;
191
192 *auth_method = result;
193 return NT_STATUS_OK;
194}
195
196NTSTATUS auth_wbc_init(void)
197{
198 return smb_register_auth(AUTH_INTERFACE_VERSION, "wbc", auth_init_wbc);
199}
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