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
|
/*
Unix SMB/CIFS implementation.
Generic Authentication Interface
Copyright (C) Andrew Tridgell 2003
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
Copyright (C) Stefan Metzmacher 2004
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/*
do a non-athenticated dcerpc bind
*/
NTSTATUS dcerpc_bind_auth_none(struct dcerpc_pipe *p,
const char *uuid, uint_t version)
{
TALLOC_CTX *tmp_ctx = talloc_new(p);
NTSTATUS status;
status = dcerpc_bind_byuuid(p, tmp_ctx, uuid, version);
talloc_free(tmp_ctx);
return status;
}
/*
perform a multi-part authenticated bind
*/
NTSTATUS dcerpc_bind_auth(struct dcerpc_pipe *p, uint8_t auth_type, uint8_t auth_level,
const char *uuid, uint_t version)
{
NTSTATUS status;
TALLOC_CTX *tmp_ctx = talloc_new(p);
DATA_BLOB credentials;
DATA_BLOB null_data_blob = data_blob(NULL, 0);
if (!p->conn->security_state.generic_state) {
status = gensec_client_start(p, &p->conn->security_state.generic_state);
if (!NT_STATUS_IS_OK(status)) goto done;
status = gensec_start_mech_by_authtype(p->conn->security_state.generic_state,
auth_type, auth_level);
if (!NT_STATUS_IS_OK(status)) goto done;
}
p->conn->security_state.auth_info = talloc(p, struct dcerpc_auth);
if (!p->conn->security_state.auth_info) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
p->conn->security_state.auth_info->auth_type = auth_type;
p->conn->security_state.auth_info->auth_level = auth_level;
p->conn->security_state.auth_info->auth_pad_length = 0;
p->conn->security_state.auth_info->auth_reserved = 0;
p->conn->security_state.auth_info->auth_context_id = random();
p->conn->security_state.auth_info->credentials = null_data_blob;
status = gensec_update(p->conn->security_state.generic_state, tmp_ctx,
null_data_blob,
&credentials);
p->conn->security_state.auth_info->credentials = credentials;
if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
/* We are demanding a reply, so use a request that will get us one */
status = dcerpc_bind_byuuid(p, tmp_ctx, uuid, version);
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
} else if (NT_STATUS_IS_OK(status)) {
/* We don't care for the reply, so jump to the end */
status = dcerpc_bind_byuuid(p, tmp_ctx, uuid, version);
goto done;
} else {
/* Something broke in GENSEC - bail */
goto done;
}
while (1) {
status = gensec_update(p->conn->security_state.generic_state, tmp_ctx,
p->conn->security_state.auth_info->credentials,
&credentials);
if (!NT_STATUS_IS_OK(status)
&& !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
break;
}
if (!credentials.length) {
break;
}
p->conn->security_state.auth_info->credentials = credentials;
if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
/* We are demanding a reply, so use a request that will get us one */
status = dcerpc_alter_context(p, tmp_ctx, &p->syntax, &p->transfer_syntax);
if (!NT_STATUS_IS_OK(status)) {
break;
}
} else {
/* NO reply expected, so just send it */
status = dcerpc_auth3(p->conn, tmp_ctx);
credentials = data_blob(NULL, 0);
if (!NT_STATUS_IS_OK(status)) {
break;
}
}
};
done:
talloc_free(tmp_ctx);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(p->conn->security_state.generic_state);
ZERO_STRUCT(p->conn->security_state);
} else {
/* Authenticated connections use the generic session key */
p->conn->security_state.session_key = dcerpc_generic_session_key;
}
return status;
}
/*
setup GENSEC on a DCE-RPC pipe
*/
NTSTATUS dcerpc_bind_auth_password(struct dcerpc_pipe *p,
const char *uuid, uint_t version,
struct cli_credentials *credentials,
uint8_t auth_type,
const char *service)
{
NTSTATUS status;
if (!(p->conn->flags & (DCERPC_SIGN | DCERPC_SEAL))) {
p->conn->flags |= DCERPC_CONNECT;
}
status = gensec_client_start(p, &p->conn->security_state.generic_state);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to start GENSEC client mode: %s\n", nt_errstr(status)));
return status;
}
status = gensec_set_credentials(p->conn->security_state.generic_state,
credentials);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to start set GENSEC client credentails: %s\n",
nt_errstr(status)));
return status;
}
status = gensec_set_target_hostname(p->conn->security_state.generic_state,
p->conn->transport.peer_name(p->conn));
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to start set GENSEC target hostname: %s\n",
nt_errstr(status)));
return status;
}
if (service) {
status = gensec_set_target_service(p->conn->security_state.generic_state, service);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to start set GENSEC target service: %s\n",
nt_errstr(status)));
return status;
}
}
status = gensec_start_mech_by_authtype(p->conn->security_state.generic_state,
auth_type,
dcerpc_auth_level(p->conn));
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to start set GENSEC client mechanism %s: %s\n",
gensec_get_name_by_authtype(auth_type), nt_errstr(status)));
return status;
}
status = dcerpc_bind_auth(p, auth_type,
dcerpc_auth_level(p->conn),
uuid, version);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(2, ("Failed to bind to pipe with %s: %s\n",
gensec_get_name_by_authtype(auth_type), nt_errstr(status)));
return status;
}
return status;
}
|
