1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
Unix SMB/CIFS implementation.
Winbind client authentication mechanism designed to defer all
authentication to the winbind daemon.
Copyright (C) Tim Potter 2000
Copyright (C) Andrew Bartlett 2001 - 2002
Copyright (C) Dan Sledz 2009
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* This auth module is very similar to auth_winbind with 3 distinct
* differences.
*
* 1) Does not fallback to another auth module if winbindd is unavailable
* 2) Does not validate the domain of the user
* 3) Handles unencrypted passwords
*
* The purpose of this module is to defer all authentication decisions (ie:
* local user vs NIS vs LDAP vs AD; encrypted vs plaintext) to the wbc
* compatible daemon. This centeralizes all authentication decisions to a
* single provider.
*
* This auth backend is most useful when used in conjunction with pdb_wbc_sam.
*/
#include "includes.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
/* Authenticate a user with a challenge/response */
static NTSTATUS check_wbc_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)
{
NTSTATUS nt_status;
wbcErr wbc_status;
struct wbcAuthUserParams params;
struct wbcAuthUserInfo *info = NULL;
struct wbcAuthErrorInfo *err = NULL;
if (!user_info || !auth_context || !server_info) {
return NT_STATUS_INVALID_PARAMETER;
}
/* Send off request */
DEBUG(10, ("Check auth for: [%s]", user_info->internal_username));
params.account_name = user_info->smb_name;
params.domain_name = user_info->domain;
params.workstation_name = user_info->wksta_name;
params.flags = 0;
params.parameter_control= user_info->logon_parameters;
/* Handle plaintext */
if (!user_info->encrypted) {
DEBUG(3,("Checking plaintext password for %s.\n",
user_info->internal_username));
params.level = WBC_AUTH_USER_LEVEL_PLAIN;
params.password.plaintext = (char *)user_info->plaintext_password.data;
} else {
DEBUG(3,("Checking encrypted password for %s.\n",
user_info->internal_username));
params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
memcpy(params.password.response.challenge,
auth_context->challenge.data,
sizeof(params.password.response.challenge));
params.password.response.nt_length = user_info->nt_resp.length;
params.password.response.nt_data = user_info->nt_resp.data;
params.password.response.lm_length = user_info->lm_resp.length;
params.password.response.lm_data = user_info->lm_resp.data;
}
/* we are contacting the privileged pipe */
become_root();
wbc_status = wbcAuthenticateUserEx(¶ms, &info, &err);
unbecome_root();
if (!WBC_ERROR_IS_OK(wbc_status)) {
DEBUG(10,("wbcAuthenticateUserEx failed (%d): %s\n",
wbc_status, wbcErrorString(wbc_status)));
}
if (wbc_status == WBC_ERR_NO_MEMORY) {
return NT_STATUS_NO_MEMORY;
}
if (wbc_status == WBC_ERR_AUTH_ERROR) {
nt_status = NT_STATUS(err->nt_status);
wbcFreeMemory(err);
return nt_status;
}
if (!WBC_ERROR_IS_OK(wbc_status)) {
return NT_STATUS_LOGON_FAILURE;
}
DEBUG(10,("wbcAuthenticateUserEx succeeded\n"));
nt_status = make_server_info_wbcAuthUserInfo(mem_ctx,
user_info->smb_name,
user_info->domain,
info, server_info);
wbcFreeMemory(info);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
(*server_info)->nss_token |= user_info->was_mapped;
return nt_status;
}
/* module initialisation */
static NTSTATUS auth_init_wbc(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
{
struct auth_methods *result;
result = TALLOC_ZERO_P(auth_context, struct auth_methods);
if (result == NULL) {
return NT_STATUS_NO_MEMORY;
}
result->name = "wbc";
result->auth = check_wbc_security;
*auth_method = result;
return NT_STATUS_OK;
}
NTSTATUS auth_wbc_init(void)
{
return smb_register_auth(AUTH_INTERFACE_VERSION, "wbc", auth_init_wbc);
}
|
