Ensure that only parse_prs.c access internal members of the prs_struct.
[samba.git] / source3 / 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(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, 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_UNSUCCESSFUL;
76         }               
77
78         /* Send off request */
79
80         ZERO_STRUCT(request);
81         ZERO_STRUCT(response);
82
83         request.data.auth_crap.flags = WINBIND_PAM_INFO3_NDR;
84
85         push_utf8_fstring(request.data.auth_crap.user, 
86                           user_info->smb_name.str);
87         push_utf8_fstring(request.data.auth_crap.domain, 
88                           user_info->domain.str);
89         push_utf8_fstring(request.data.auth_crap.workstation, 
90                           user_info->wksta_name.str);
91
92         memcpy(request.data.auth_crap.chal, auth_context->challenge.data, sizeof(request.data.auth_crap.chal));
93         
94         request.data.auth_crap.lm_resp_len = MIN(user_info->lm_resp.length, 
95                                                  sizeof(request.data.auth_crap.lm_resp));
96         request.data.auth_crap.nt_resp_len = MIN(user_info->nt_resp.length, 
97                                                  sizeof(request.data.auth_crap.nt_resp));
98         
99         memcpy(request.data.auth_crap.lm_resp, user_info->lm_resp.data, 
100                request.data.auth_crap.lm_resp_len);
101         memcpy(request.data.auth_crap.nt_resp, user_info->nt_resp.data, 
102                request.data.auth_crap.nt_resp_len);
103         
104         result = winbindd_request(WINBINDD_PAM_AUTH_CRAP, &request, &response);
105
106         nt_status = NT_STATUS(response.data.auth.nt_status);
107
108         if (result == NSS_STATUS_SUCCESS && response.extra_data) {
109                 if (NT_STATUS_IS_OK(nt_status)) {
110                         if (NT_STATUS_IS_OK(nt_status = get_info3_from_ndr(mem_ctx, &response, &info3))) { 
111                                 nt_status = 
112                                         make_server_info_info3(mem_ctx, 
113                                                                user_info->internal_username.str, 
114                                                                user_info->smb_name.str, 
115                                                                user_info->domain.str, 
116                                                                server_info, 
117                                                                &info3); 
118                         }
119                 }
120         } else if (NT_STATUS_IS_OK(nt_status)) {
121                 nt_status = NT_STATUS_UNSUCCESSFUL;
122         }
123
124         return nt_status;
125 }
126
127 /* module initialisation */
128 NTSTATUS auth_init_winbind(struct auth_context *auth_context, const char *param, auth_methods **auth_method) 
129 {
130         if (!make_auth_methods(auth_context, auth_method))
131                 return NT_STATUS_NO_MEMORY;
132
133         (*auth_method)->name = "winbind";
134         (*auth_method)->auth = check_winbind_security;
135         return NT_STATUS_OK;
136 }