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
check_unix_security(const struct auth_context * auth_context,void * my_private_data,TALLOC_CTX * mem_ctx,const struct auth_usersupplied_info * user_info,struct auth_serversupplied_info ** server_info)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 something 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 */
auth_init_unix(struct auth_context * auth_context,const char * param,struct auth_methods ** auth_method)86 static NTSTATUS auth_init_unix(
87 struct auth_context *auth_context,
88 const char* param,
89 struct auth_methods **auth_method)
90 {
91 struct auth_methods *result;
92
93 result = talloc_zero(auth_context, struct auth_methods);
94 if (result == NULL) {
95 return NT_STATUS_NO_MEMORY;
96 }
97 result->name = "unix";
98 result->auth = check_unix_security;
99
100 *auth_method = result;
101 return NT_STATUS_OK;
102 }
103
auth_unix_init(TALLOC_CTX * mem_ctx)104 NTSTATUS auth_unix_init(TALLOC_CTX *mem_ctx)
105 {
106 return smb_register_auth(AUTH_INTERFACE_VERSION, "unix", auth_init_unix);
107 }
108