import HEAD into svn+ssh://svn.samba.org/home/svn/samba/trunk
[metze/old/v3-2-winbind-ndr.git] / source / auth / auth_winbind.c
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 2 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, write to the Free Software
21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 #include "includes.h"
25
26 #undef DBGC_CLASS
27 #define DBGC_CLASS DBGC_AUTH
28
29 static NTSTATUS get_info3_from_ndr(TALLOC_CTX *mem_ctx, struct winbindd_response *response, NET_USER_INFO_3 *info3)
30 {
31         uint8 *info3_ndr;
32         size_t len = response->length - sizeof(struct winbindd_response);
33         prs_struct ps;
34         if (len > 0) {
35                 info3_ndr = response->extra_data;
36                 if (!prs_init(&ps, len, mem_ctx, UNMARSHALL)) {
37                         return NT_STATUS_NO_MEMORY;
38                 }
39                 prs_copy_data_in(&ps, (char *)info3_ndr, len);
40                 prs_set_offset(&ps,0);
41                 if (!net_io_user_info3("", info3, &ps, 1, 3)) {
42                         DEBUG(2, ("get_info3_from_ndr: could not parse info3 struct!\n"));
43                         return NT_STATUS_UNSUCCESSFUL;
44                 }
45                 prs_mem_free(&ps);
46
47                 return NT_STATUS_OK;
48         } else {
49                 DEBUG(2, ("get_info3_from_ndr: No info3 struct found!\n"));
50                 return NT_STATUS_UNSUCCESSFUL;
51         }
52 }
53
54 /* Authenticate a user with a challenge/response */
55
56 static NTSTATUS check_winbind_security(const struct auth_context *auth_context,
57                                        void *my_private_data, 
58                                        TALLOC_CTX *mem_ctx,
59                                        const auth_usersupplied_info *user_info, 
60                                        auth_serversupplied_info **server_info)
61 {
62         struct winbindd_request request;
63         struct winbindd_response response;
64         NSS_STATUS result;
65         NTSTATUS nt_status;
66         NET_USER_INFO_3 info3;
67
68         if (!user_info) {
69                 return NT_STATUS_INVALID_PARAMETER;
70         }
71
72         if (!auth_context) {
73                 DEBUG(3,("Password for user %s cannot be checked because we have no auth_info to get the challenge from.\n", 
74                          user_info->internal_username.str));            
75                 return NT_STATUS_INVALID_PARAMETER;
76         }               
77
78         if (strequal(user_info->domain.str, get_global_sam_name())) {
79                 DEBUG(3,("check_winbind_security: Not using winbind, requested domain [%s] was for this SAM.\n",
80                         user_info->domain.str));
81                 return NT_STATUS_NOT_IMPLEMENTED;
82         }
83
84         /* Send off request */
85
86         ZERO_STRUCT(request);
87         ZERO_STRUCT(response);
88
89         request.flags = WBFLAG_PAM_INFO3_NDR;
90
91         push_utf8_fstring(request.data.auth_crap.user, 
92                           user_info->smb_name.str);
93         push_utf8_fstring(request.data.auth_crap.domain, 
94                           user_info->domain.str);
95         push_utf8_fstring(request.data.auth_crap.workstation, 
96                           user_info->wksta_name.str);
97
98         memcpy(request.data.auth_crap.chal, auth_context->challenge.data, sizeof(request.data.auth_crap.chal));
99         
100         request.data.auth_crap.lm_resp_len = MIN(user_info->lm_resp.length, 
101                                                  sizeof(request.data.auth_crap.lm_resp));
102         request.data.auth_crap.nt_resp_len = MIN(user_info->nt_resp.length, 
103                                                  sizeof(request.data.auth_crap.nt_resp));
104         
105         memcpy(request.data.auth_crap.lm_resp, user_info->lm_resp.data, 
106                request.data.auth_crap.lm_resp_len);
107         memcpy(request.data.auth_crap.nt_resp, user_info->nt_resp.data, 
108                request.data.auth_crap.nt_resp_len);
109
110         /* we are contacting the privileged pipe */
111         become_root();
112         result = winbindd_request(WINBINDD_PAM_AUTH_CRAP, &request, &response);
113         unbecome_root();
114
115         if ( result == NSS_STATUS_UNAVAIL )  {
116                 struct auth_methods *auth_method = my_private_data;
117
118                 if ( auth_method )
119                         return auth_method->auth(auth_context, auth_method->private_data, 
120                                 mem_ctx, user_info, server_info);
121                 else
122                         /* log an error since this should not happen */
123                         DEBUG(0,("check_winbind_security: ERROR!  my_private_data == NULL!\n"));
124         }
125
126         nt_status = NT_STATUS(response.data.auth.nt_status);
127
128         if (result == NSS_STATUS_SUCCESS && response.extra_data) {
129                 if (NT_STATUS_IS_OK(nt_status)) {
130                 
131                         if (NT_STATUS_IS_OK(nt_status = get_info3_from_ndr(mem_ctx, &response, &info3))) 
132                         { 
133                                 nt_status = make_server_info_info3(mem_ctx, 
134                                         user_info->internal_username.str, 
135                                         user_info->smb_name.str, user_info->domain.str, 
136                                         server_info, &info3); 
137                         }
138                         
139                 }
140         } else if (NT_STATUS_IS_OK(nt_status)) {
141                 nt_status = NT_STATUS_NO_LOGON_SERVERS;
142         }
143
144         return nt_status;
145 }
146
147 /* module initialisation */
148 static NTSTATUS auth_init_winbind(struct auth_context *auth_context, const char *param, auth_methods **auth_method) 
149 {
150         if (!make_auth_methods(auth_context, auth_method)) {
151                 return NT_STATUS_NO_MEMORY;
152         }
153
154         (*auth_method)->name = "winbind";
155         (*auth_method)->auth = check_winbind_security;
156
157         if (param && *param) {
158                 /* we load the 'fallback' module - if winbind isn't here, call this
159                    module */
160                 if (!load_auth_module(auth_context, param, (auth_methods **)&(*auth_method)->private_data)) {
161                         return NT_STATUS_UNSUCCESSFUL;
162                 }
163                 
164         }
165         return NT_STATUS_OK;
166 }
167
168 NTSTATUS auth_winbind_init(void)
169 {
170         return smb_register_auth(AUTH_INTERFACE_VERSION, "winbind", auth_init_winbind);
171 }