source: trunk-3.0/source/auth/auth_winbind.c@ 101

Last change on this file since 101 was 22, checked in by Yuri Dario, 18 years ago

Source code upgrade to 3.0.25pre2.
File size: 5.6 KB
Line 
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
29static 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 = (uint8 *)response->extra_data.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, False)) {
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
56static 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));
75 return NT_STATUS_INVALID_PARAMETER;
76 }
77
78 if (strequal(user_info->domain, 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));
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 request.data.auth_crap.logon_parameters = user_info->logon_parameters;
92
93 fstrcpy(request.data.auth_crap.user, user_info->smb_name);
94 fstrcpy(request.data.auth_crap.domain, user_info->domain);
95 fstrcpy(request.data.auth_crap.workstation, user_info->wksta_name);
96
97 memcpy(request.data.auth_crap.chal, auth_context->challenge.data, sizeof(request.data.auth_crap.chal));
98
99 request.data.auth_crap.lm_resp_len = MIN(user_info->lm_resp.length,
100 sizeof(request.data.auth_crap.lm_resp));
101 request.data.auth_crap.nt_resp_len = MIN(user_info->nt_resp.length,
102 sizeof(request.data.auth_crap.nt_resp));
103
104 memcpy(request.data.auth_crap.lm_resp, user_info->lm_resp.data,
105 request.data.auth_crap.lm_resp_len);
106 memcpy(request.data.auth_crap.nt_resp, user_info->nt_resp.data,
107 request.data.auth_crap.nt_resp_len);
108
109 /* we are contacting the privileged pipe */
110 become_root();
111 result = winbindd_priv_request_response(WINBINDD_PAM_AUTH_CRAP,
112 &request, &response);
113 unbecome_root();
114
115 if ( result == NSS_STATUS_UNAVAIL ) {
116 struct auth_methods *auth_method =
117 (struct auth_methods *)my_private_data;
118
119 if ( auth_method )
120 return auth_method->auth(auth_context, auth_method->private_data,
121 mem_ctx, user_info, server_info);
122 else
123 /* log an error since this should not happen */
124 DEBUG(0,("check_winbind_security: ERROR! my_private_data == NULL!\n"));
125 }
126
127 nt_status = NT_STATUS(response.data.auth.nt_status);
128
129 if (result == NSS_STATUS_SUCCESS && response.extra_data.data) {
130 if (NT_STATUS_IS_OK(nt_status)) {
131 if (NT_STATUS_IS_OK(nt_status = get_info3_from_ndr(mem_ctx, &response, &info3))) {
132 nt_status = make_server_info_info3(mem_ctx,
133 user_info->smb_name, user_info->domain,
134 server_info, &info3);
135 }
136
137 if (NT_STATUS_IS_OK(nt_status)) {
138 (*server_info)->was_mapped |= user_info->was_mapped;
139 }
140 }
141 } else if (NT_STATUS_IS_OK(nt_status)) {
142 nt_status = NT_STATUS_NO_LOGON_SERVERS;
143 }
144
145 SAFE_FREE(response.extra_data.data);
146 return nt_status;
147}
148
149/* module initialisation */
150static NTSTATUS auth_init_winbind(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
151{
152 if (!make_auth_methods(auth_context, auth_method)) {
153 return NT_STATUS_NO_MEMORY;
154 }
155
156 (*auth_method)->name = "winbind";
157 (*auth_method)->auth = check_winbind_security;
158
159 if (param && *param) {
160 /* we load the 'fallback' module - if winbind isn't here, call this
161 module */
162 auth_methods *priv;
163 if (!load_auth_module(auth_context, param, &priv)) {
164 return NT_STATUS_UNSUCCESSFUL;
165 }
166 (*auth_method)->private_data = (void *)priv;
167 }
168 return NT_STATUS_OK;
169}
170
171NTSTATUS auth_winbind_init(void)
172{
173 return smb_register_auth(AUTH_INTERFACE_VERSION, "winbind", auth_init_winbind);
174}
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