s3:auth_winbind: ignore a missing winbindd as NT4 PDC/BDC without trusts
[Samba.git] / source3 / auth / auth_winbind.c
blob93b832265cfa81367ac608923c480168ef20b2ed
1 /*
2 Unix SMB/CIFS implementation.
4 Winbind authentication mechnism
6 Copyright (C) Tim Potter 2000
7 Copyright (C) Andrew Bartlett 2001 - 2002
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.
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.
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/>.
23 #include "includes.h"
24 #include "auth.h"
25 #include "passdb.h"
26 #include "nsswitch/libwbclient/wbclient.h"
28 #undef DBGC_CLASS
29 #define DBGC_CLASS DBGC_AUTH
31 /* Authenticate a user with a challenge/response */
33 static NTSTATUS check_winbind_security(const struct auth_context *auth_context,
34 void *my_private_data,
35 TALLOC_CTX *mem_ctx,
36 const struct auth_usersupplied_info *user_info,
37 struct auth_serversupplied_info **server_info)
39 NTSTATUS nt_status;
40 wbcErr wbc_status;
41 struct wbcAuthUserParams params;
42 struct wbcAuthUserInfo *info = NULL;
43 struct wbcAuthErrorInfo *err = NULL;
45 ZERO_STRUCT(params);
47 if (!user_info) {
48 return NT_STATUS_INVALID_PARAMETER;
51 DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
53 if (!auth_context) {
54 DEBUG(3,("Password for user %s cannot be checked because we have no auth_info to get the challenge from.\n",
55 user_info->mapped.account_name));
56 return NT_STATUS_INVALID_PARAMETER;
59 if (strequal(user_info->mapped.domain_name, get_global_sam_name())) {
60 DEBUG(3,("check_winbind_security: Not using winbind, requested domain [%s] was for this SAM.\n",
61 user_info->mapped.domain_name));
62 return NT_STATUS_NOT_IMPLEMENTED;
65 /* Send off request */
66 params.account_name = user_info->client.account_name;
68 * We need to send the domain name from the client to the DC. With
69 * NTLMv2 the domain name is part of the hashed second challenge,
70 * if we change the domain name, the DC will fail to verify the
71 * challenge cause we changed the domain name, this is like a
72 * man in the middle attack.
74 params.domain_name = user_info->client.domain_name;
75 params.workstation_name = user_info->workstation_name;
77 params.flags = 0;
78 params.parameter_control= user_info->logon_parameters;
80 params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
82 memcpy(params.password.response.challenge,
83 auth_context->challenge.data,
84 sizeof(params.password.response.challenge));
86 if (user_info->password.response.nt.length != 0) {
87 params.password.response.nt_length =
88 user_info->password.response.nt.length;
89 params.password.response.nt_data =
90 user_info->password.response.nt.data;
92 if (user_info->password.response.lanman.length != 0) {
93 params.password.response.lm_length =
94 user_info->password.response.lanman.length;
95 params.password.response.lm_data =
96 user_info->password.response.lanman.data;
99 /* we are contacting the privileged pipe */
100 become_root();
101 wbc_status = wbcAuthenticateUserEx(&params, &info, &err);
102 unbecome_root();
104 if (!WBC_ERROR_IS_OK(wbc_status)) {
105 DEBUG(10,("check_winbind_security: wbcAuthenticateUserEx failed: %s\n",
106 wbcErrorString(wbc_status)));
109 if (wbc_status == WBC_ERR_NO_MEMORY) {
110 return NT_STATUS_NO_MEMORY;
113 if (wbc_status == WBC_ERR_WINBIND_NOT_AVAILABLE) {
114 struct pdb_trusted_domain **domains = NULL;
115 uint32_t num_domains = 0;
116 NTSTATUS status;
118 if (lp_server_role() == ROLE_DOMAIN_MEMBER) {
119 status = NT_STATUS_NO_LOGON_SERVERS;
120 DBG_ERR("winbindd not running - "
121 "but required as domain member: %s\n",
122 nt_errstr(status));
123 return status;
126 status = pdb_enum_trusted_domains(talloc_tos(), &num_domains, &domains);
127 if (!NT_STATUS_IS_OK(status)) {
128 DBG_ERR("pdb_enum_trusted_domains() failed - %s\n",
129 nt_errstr(status));
130 return status;
132 TALLOC_FREE(domains);
134 if (num_domains == 0) {
135 DBG_DEBUG("winbindd not running - ignoring without "
136 "trusted domains\n");
137 return NT_STATUS_NOT_IMPLEMENTED;
140 status = NT_STATUS_NO_LOGON_SERVERS;
141 DBG_ERR("winbindd not running - "
142 "but required as DC with trusts: %s\n",
143 nt_errstr(status));
144 return status;
147 if (wbc_status == WBC_ERR_AUTH_ERROR) {
148 nt_status = NT_STATUS(err->nt_status);
150 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) &&
151 (err->authoritative == 0)) {
153 * Trigger a fallback to local SAM
155 nt_status = NT_STATUS_NOT_IMPLEMENTED;
158 wbcFreeMemory(err);
159 return nt_status;
162 if (!WBC_ERROR_IS_OK(wbc_status)) {
163 return NT_STATUS_LOGON_FAILURE;
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;
175 (*server_info)->nss_token |= user_info->was_mapped;
177 return nt_status;
180 /* module initialisation */
181 static NTSTATUS auth_init_winbind(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
183 struct auth_methods *result;
185 result = talloc_zero(auth_context, struct auth_methods);
186 if (result == NULL) {
187 return NT_STATUS_NO_MEMORY;
189 result->name = "winbind";
190 result->auth = check_winbind_security;
192 *auth_method = result;
193 return NT_STATUS_OK;
196 NTSTATUS auth_winbind_init(TALLOC_CTX *mem_ctx)
198 return smb_register_auth(AUTH_INTERFACE_VERSION, "winbind", auth_init_winbind);