Line data Source code
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 "passdb.h"
26 : #include "nsswitch/libwbclient/wbclient.h"
27 :
28 : #undef DBGC_CLASS
29 : #define DBGC_CLASS DBGC_AUTH
30 :
31 : /* Authenticate a user with a challenge/response */
32 :
33 204 : 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)
38 : {
39 : NTSTATUS nt_status;
40 : wbcErr wbc_status;
41 : struct wbcAuthUserParams params;
42 204 : struct wbcAuthUserInfo *info = NULL;
43 204 : struct wbcAuthErrorInfo *err = NULL;
44 :
45 204 : ZERO_STRUCT(params);
46 :
47 204 : if (!user_info) {
48 0 : return NT_STATUS_INVALID_PARAMETER;
49 : }
50 :
51 204 : DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
52 :
53 204 : if (!auth_context) {
54 0 : 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 0 : return NT_STATUS_INVALID_PARAMETER;
57 : }
58 :
59 204 : if (strequal(user_info->mapped.domain_name, get_global_sam_name())) {
60 0 : DEBUG(3,("check_winbind_security: Not using winbind, requested domain [%s] was for this SAM.\n",
61 : user_info->mapped.domain_name));
62 0 : return NT_STATUS_NOT_IMPLEMENTED;
63 : }
64 :
65 : /* Send off request */
66 204 : params.account_name = user_info->client.account_name;
67 : /*
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.
73 : */
74 204 : params.domain_name = user_info->client.domain_name;
75 204 : params.workstation_name = user_info->workstation_name;
76 :
77 204 : params.flags = 0;
78 204 : params.parameter_control= user_info->logon_parameters;
79 :
80 204 : params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
81 :
82 204 : memcpy(params.password.response.challenge,
83 204 : auth_context->challenge.data,
84 : sizeof(params.password.response.challenge));
85 :
86 204 : if (user_info->password.response.nt.length != 0) {
87 196 : params.password.response.nt_length =
88 196 : user_info->password.response.nt.length;
89 196 : params.password.response.nt_data =
90 196 : user_info->password.response.nt.data;
91 : }
92 204 : if (user_info->password.response.lanman.length != 0) {
93 192 : params.password.response.lm_length =
94 192 : user_info->password.response.lanman.length;
95 192 : params.password.response.lm_data =
96 192 : user_info->password.response.lanman.data;
97 : }
98 :
99 : /* we are contacting the privileged pipe */
100 204 : become_root();
101 204 : wbc_status = wbcAuthenticateUserEx(¶ms, &info, &err);
102 204 : unbecome_root();
103 :
104 204 : if (!WBC_ERROR_IS_OK(wbc_status)) {
105 58 : DEBUG(10,("check_winbind_security: wbcAuthenticateUserEx failed: %s\n",
106 : wbcErrorString(wbc_status)));
107 : }
108 :
109 204 : if (wbc_status == WBC_ERR_NO_MEMORY) {
110 0 : return NT_STATUS_NO_MEMORY;
111 : }
112 :
113 204 : if (wbc_status == WBC_ERR_WINBIND_NOT_AVAILABLE) {
114 0 : struct pdb_trusted_domain **domains = NULL;
115 0 : uint32_t num_domains = 0;
116 : NTSTATUS status;
117 :
118 0 : if (lp_server_role() == ROLE_DOMAIN_MEMBER) {
119 0 : status = NT_STATUS_NO_LOGON_SERVERS;
120 0 : DBG_ERR("winbindd not running - "
121 : "but required as domain member: %s\n",
122 : nt_errstr(status));
123 0 : return status;
124 : }
125 :
126 0 : status = pdb_enum_trusted_domains(talloc_tos(), &num_domains, &domains);
127 0 : if (!NT_STATUS_IS_OK(status)) {
128 0 : DBG_ERR("pdb_enum_trusted_domains() failed - %s\n",
129 : nt_errstr(status));
130 0 : return status;
131 : }
132 0 : TALLOC_FREE(domains);
133 :
134 0 : if (num_domains == 0) {
135 0 : DBG_DEBUG("winbindd not running - ignoring without "
136 : "trusted domains\n");
137 0 : return NT_STATUS_NOT_IMPLEMENTED;
138 : }
139 :
140 0 : status = NT_STATUS_NO_LOGON_SERVERS;
141 0 : DBG_ERR("winbindd not running - "
142 : "but required as DC with trusts: %s\n",
143 : nt_errstr(status));
144 0 : return status;
145 : }
146 :
147 204 : if (wbc_status == WBC_ERR_AUTH_ERROR) {
148 58 : nt_status = NT_STATUS(err->nt_status);
149 :
150 85 : if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) &&
151 54 : (err->authoritative == 0)) {
152 : /*
153 : * Trigger a fallback to local SAM
154 : */
155 36 : nt_status = NT_STATUS_NOT_IMPLEMENTED;
156 : }
157 :
158 58 : wbcFreeMemory(err);
159 58 : return nt_status;
160 : }
161 :
162 146 : if (!WBC_ERROR_IS_OK(wbc_status)) {
163 0 : return NT_STATUS_LOGON_FAILURE;
164 : }
165 :
166 146 : nt_status = make_server_info_wbcAuthUserInfo(mem_ctx,
167 73 : user_info->client.account_name,
168 73 : user_info->mapped.domain_name,
169 : info, server_info);
170 146 : wbcFreeMemory(info);
171 146 : if (!NT_STATUS_IS_OK(nt_status)) {
172 4 : return nt_status;
173 : }
174 :
175 142 : (*server_info)->nss_token |= user_info->was_mapped;
176 :
177 142 : return nt_status;
178 : }
179 :
180 : /* module initialisation */
181 4122 : static NTSTATUS auth_init_winbind(
182 : struct auth_context *auth_context,
183 : const char *param,
184 : struct auth_methods **auth_method)
185 : {
186 : struct auth_methods *result;
187 :
188 4122 : result = talloc_zero(auth_context, struct auth_methods);
189 4122 : if (result == NULL) {
190 0 : return NT_STATUS_NO_MEMORY;
191 : }
192 4122 : result->name = "winbind";
193 4122 : result->auth = check_winbind_security;
194 :
195 4122 : *auth_method = result;
196 4122 : return NT_STATUS_OK;
197 : }
198 :
199 5149 : NTSTATUS auth_winbind_init(TALLOC_CTX *mem_ctx)
200 : {
201 5149 : return smb_register_auth(AUTH_INTERFACE_VERSION, "winbind", auth_init_winbind);
202 : }
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