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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
Unix SMB/CIFS implementation.
Authenticate by using a remote server
Copyright (C) Andrew Bartlett 2001-2002, 2008
Copyright (C) Jelmer Vernooij 2002
Copyright (C) Stefan Metzmacher 2005
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/>.
*/
#include "includes.h"
#include "auth/auth.h"
#include "auth/credentials/credentials.h"
#include "libcli/security/security.h"
#include "libcli/smb_composite/smb_composite.h"
#include "param/param.h"
#include "libcli/resolve/resolve.h"
_PUBLIC_ NTSTATUS auth4_server_init(void);
/* This version of 'security=server' rewirtten from scratch for Samba4
* libraries in 2008 */
static NTSTATUS server_want_check(struct auth_method_context *ctx,
TALLOC_CTX *mem_ctx,
const struct auth_usersupplied_info *user_info)
{
return NT_STATUS_OK;
}
/**
* The challenge from the target server, when operating in security=server
**/
static NTSTATUS server_get_challenge(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx, uint8_t chal[8])
{
struct smb_composite_connect io;
struct smbcli_options smb_options;
const char **host_list;
NTSTATUS status;
/* Make a connection to the target server, found by 'password server' in smb.conf */
lpcfg_smbcli_options(ctx->auth_ctx->lp_ctx, &smb_options);
/* Make a negprot, WITHOUT SPNEGO, so we get a challenge nice an easy */
io.in.options.use_spnego = false;
/* Hope we don't get * (the default), as this won't work... */
host_list = lpcfg_passwordserver(ctx->auth_ctx->lp_ctx);
if (!host_list) {
return NT_STATUS_INTERNAL_ERROR;
}
io.in.dest_host = host_list[0];
if (strequal(io.in.dest_host, "*")) {
return NT_STATUS_INTERNAL_ERROR;
}
io.in.dest_ports = lpcfg_smb_ports(ctx->auth_ctx->lp_ctx);
io.in.socket_options = lpcfg_socket_options(ctx->auth_ctx->lp_ctx);
io.in.gensec_settings = lpcfg_gensec_settings(mem_ctx, ctx->auth_ctx->lp_ctx);
io.in.called_name = strupper_talloc(mem_ctx, io.in.dest_host);
/* We don't want to get as far as the session setup */
io.in.credentials = cli_credentials_init_anon(mem_ctx);
cli_credentials_set_workstation(io.in.credentials,
lpcfg_netbios_name(ctx->auth_ctx->lp_ctx),
CRED_SPECIFIED);
io.in.service = NULL;
io.in.workgroup = ""; /* only used with SPNEGO, disabled above */
io.in.options = smb_options;
lpcfg_smbcli_session_options(ctx->auth_ctx->lp_ctx, &io.in.session_options);
status = smb_composite_connect(&io, mem_ctx, lpcfg_resolve_context(ctx->auth_ctx->lp_ctx),
ctx->auth_ctx->event_ctx);
NT_STATUS_NOT_OK_RETURN(status);
if (io.out.tree->session->transport->negotiate.secblob.length != 8) {
return NT_STATUS_INTERNAL_ERROR;
}
memcpy(chal, io.out.tree->session->transport->negotiate.secblob.data, 8);
ctx->private_data = talloc_steal(ctx, io.out.tree->session);
return NT_STATUS_OK;
}
/**
* Return an error based on username
*
* This function allows the testing of obsure errors, as well as the generation
* of NT_STATUS -> DOS error mapping tables.
*
* This module is of no value to end-users.
*
* The password is ignored.
*
* @return An NTSTATUS value based on the username
**/
static NTSTATUS server_check_password(struct auth_method_context *ctx,
TALLOC_CTX *mem_ctx,
const struct auth_usersupplied_info *user_info,
struct auth_user_info_dc **_user_info_dc)
{
NTSTATUS nt_status;
struct auth_user_info_dc *user_info_dc;
struct auth_user_info *info;
struct cli_credentials *creds;
struct smb_composite_sesssetup session_setup;
struct smbcli_session *session = talloc_get_type(ctx->private_data, struct smbcli_session);
creds = cli_credentials_init(mem_ctx);
NT_STATUS_HAVE_NO_MEMORY(creds);
cli_credentials_set_username(creds, user_info->client.account_name, CRED_SPECIFIED);
cli_credentials_set_domain(creds, user_info->client.domain_name, CRED_SPECIFIED);
switch (user_info->password_state) {
case AUTH_PASSWORD_PLAIN:
cli_credentials_set_password(creds, user_info->password.plaintext,
CRED_SPECIFIED);
break;
case AUTH_PASSWORD_HASH:
cli_credentials_set_nt_hash(creds, user_info->password.hash.nt,
CRED_SPECIFIED);
break;
case AUTH_PASSWORD_RESPONSE:
cli_credentials_set_ntlm_response(creds, &user_info->password.response.lanman, &user_info->password.response.nt, CRED_SPECIFIED);
break;
}
session_setup.in.sesskey = session->transport->negotiate.sesskey;
session_setup.in.capabilities = session->transport->negotiate.capabilities;
session_setup.in.credentials = creds;
session_setup.in.workgroup = ""; /* Only used with SPNEGO, which we are not doing */
session_setup.in.gensec_settings = lpcfg_gensec_settings(session, ctx->auth_ctx->lp_ctx);
/* Check password with remove server - this should be async some day */
nt_status = smb_composite_sesssetup(session, &session_setup);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
user_info_dc->num_sids = 1;
/* This returns a pointer to a struct dom_sid, which is the
* same as a 1 element list of struct dom_sid */
user_info_dc->sids = dom_sid_parse_talloc(user_info_dc, SID_NT_ANONYMOUS);
NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
/* annoying, but the Anonymous really does have a session key,
and it is all zeros! */
user_info_dc->user_session_key = data_blob(NULL, 0);
user_info_dc->lm_session_key = data_blob(NULL, 0);
user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
info->account_name = talloc_strdup(user_info_dc, user_info->client.account_name);
NT_STATUS_HAVE_NO_MEMORY(info->account_name);
info->domain_name = talloc_strdup(user_info_dc, user_info->client.domain_name);
NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
info->full_name = NULL;
info->logon_script = talloc_strdup(user_info_dc, "");
NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
info->profile_path = talloc_strdup(user_info_dc, "");
NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
info->home_directory = talloc_strdup(user_info_dc, "");
NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
info->home_drive = talloc_strdup(user_info_dc, "");
NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
info->last_logon = 0;
info->last_logoff = 0;
info->acct_expiry = 0;
info->last_password_change = 0;
info->allow_password_change = 0;
info->force_password_change = 0;
info->logon_count = 0;
info->bad_password_count = 0;
info->acct_flags = ACB_NORMAL;
info->authenticated = false;
*_user_info_dc = user_info_dc;
return nt_status;
}
static const struct auth_operations server_auth_ops = {
.name = "server",
.get_challenge = server_get_challenge,
.want_check = server_want_check,
.check_password = server_check_password
};
_PUBLIC_ NTSTATUS auth4_server_init(void)
{
NTSTATUS ret;
ret = auth_register(&server_auth_ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register 'server' auth backend!\n"));
return ret;
}
return ret;
}
|
