7b483a2f05a83bda58216fcd77b129c4474394d3
[nivanova/samba-autobuild/.git] / source3 / auth / auth_unix.c
1 /* 
2    Unix SMB/CIFS implementation.
3    Password and authentication handling
4    Copyright (C) Andrew Bartlett              2001
5
6    This program is free software; you can redistribute it and/or modify
7    it under the terms of the GNU General Public License as published by
8    the Free Software Foundation; either version 3 of the License, or
9    (at your option) any later version.
10
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15
16    You should have received a copy of the GNU General Public License
17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "includes.h"
21 #include "auth.h"
22 #include "system/passwd.h"
23 #include "../lib/tsocket/tsocket.h"
24
25 #undef DBGC_CLASS
26 #define DBGC_CLASS DBGC_AUTH
27
28 /** Check a plaintext username/password
29  *
30  * Cannot deal with an encrupted password in any manner whatsoever,
31  * unless the account has a null password.
32  **/
33
34 static NTSTATUS check_unix_security(const struct auth_context *auth_context,
35                              void *my_private_data, 
36                              TALLOC_CTX *mem_ctx,
37                              const struct auth_usersupplied_info *user_info,
38                              struct auth_serversupplied_info **server_info)
39 {
40         NTSTATUS nt_status;
41         struct passwd *pass = NULL;
42         const char *rhost;
43
44         DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
45
46         if (tsocket_address_is_inet(user_info->remote_host, "ip")) {
47                 rhost = tsocket_address_inet_addr_string(user_info->remote_host,
48                                                          talloc_tos());
49                 if (rhost == NULL) {
50                         return NT_STATUS_NO_MEMORY;
51                 }
52         } else {
53                 rhost = "127.0.0.1";
54         }
55
56         become_root();
57         pass = Get_Pwnam_alloc(talloc_tos(), user_info->mapped.account_name);
58
59         /** @todo This call assumes a ASCII password, no charset transformation is 
60             done.  We may need to revisit this **/
61         nt_status = pass_check(pass,
62                                 pass ? pass->pw_name : user_info->mapped.account_name,
63                                 rhost,
64                                 user_info->password.plaintext,
65                                 true);
66
67         unbecome_root();
68
69         if (NT_STATUS_IS_OK(nt_status)) {
70                 if (pass != NULL) {
71                         nt_status = make_server_info_pw(mem_ctx,
72                                                         pass->pw_name,
73                                                         pass,
74                                                         server_info);
75                 } else {
76                         /* we need to do somthing more useful here */
77                         nt_status = NT_STATUS_NO_SUCH_USER;
78                 }
79         }
80
81         TALLOC_FREE(pass);
82         return nt_status;
83 }
84
85 /* module initialisation */
86 static NTSTATUS auth_init_unix(struct auth_context *auth_context, const char* param, auth_methods **auth_method) 
87 {
88         struct auth_methods *result;
89
90         result = talloc_zero(auth_context, struct auth_methods);
91         if (result == NULL) {
92                 return NT_STATUS_NO_MEMORY;
93         }
94         result->name = "unix";
95         result->auth = check_unix_security;
96
97         *auth_method = result;
98         return NT_STATUS_OK;
99 }
100
101 NTSTATUS auth_unix_init(void)
102 {
103         return smb_register_auth(AUTH_INTERFACE_VERSION, "unix", auth_init_unix);
104 }