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
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
/*
Unix SMB/CIFS implementation.
Connect to the SAMR pipe, given an smbcli_tree and possibly some
credentials. Try ntlmssp, schannel and anon in that order.
Copyright (C) Volker Lendecke 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 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"
#include "libcli/composite/composite.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/security/security.h"
#include "librpc/gen_ndr/ndr_samr_c.h"
/* Helper to initialize SAMR with a specific auth methods. Verify by opening
* the SAM handle */
struct connect_samr_state {
struct composite_context *ctx;
uint8_t auth_type;
struct cli_credentials *creds;
struct dom_sid *sid;
struct dcerpc_pipe *samr_pipe;
struct policy_handle *connect_handle;
struct policy_handle *domain_handle;
struct samr_Connect2 c;
struct samr_OpenDomain o;
};
static void connect_samr_recv_pipe(struct composite_context *ctx);
static void connect_samr_recv_anon_bind(struct composite_context *ctx);
static void connect_samr_recv_auth_bind(struct composite_context *ctx);
static void connect_samr_recv_conn(struct rpc_request *req);
static void connect_samr_recv_open(struct rpc_request *req);
struct composite_context *wb_connect_sam_send(TALLOC_CTX *mem_ctx,
struct smbcli_tree *tree,
uint8_t auth_type,
struct cli_credentials *creds,
const struct dom_sid *domain_sid)
{
struct composite_context *result, *ctx;
struct connect_samr_state *state;
result = composite_create(mem_ctx, tree->session->transport->socket->event.ctx);
if (result == NULL) goto failed;
state = talloc(result, struct connect_samr_state);
if (state == NULL) goto failed;
state->ctx = result;
result->private_data = state;
state->auth_type = auth_type;
state->creds = creds;
state->sid = dom_sid_dup(state, domain_sid);
if (state->sid == NULL) goto failed;
state->samr_pipe = dcerpc_pipe_init(state, result->event_ctx);
if (state->samr_pipe == NULL) goto failed;
ctx = dcerpc_pipe_open_smb_send(state->samr_pipe, tree,
"\\samr");
ctx->async.fn = connect_samr_recv_pipe;
ctx->async.private_data = state;
return result;
failed:
talloc_free(result);
return NULL;
}
static void connect_samr_recv_pipe(struct composite_context *ctx)
{
struct connect_samr_state *state =
talloc_get_type(ctx->async.private_data,
struct connect_samr_state);
state->ctx->status = dcerpc_pipe_open_smb_recv(ctx);
if (!composite_is_ok(state->ctx)) return;
switch (state->auth_type) {
case DCERPC_AUTH_TYPE_NONE:
ctx = dcerpc_bind_auth_none_send(state, state->samr_pipe,
&dcerpc_table_samr);
composite_continue(state->ctx, ctx,
connect_samr_recv_anon_bind, state);
break;
case DCERPC_AUTH_TYPE_NTLMSSP:
case DCERPC_AUTH_TYPE_SCHANNEL:
{
uint8_t auth_type;
if (lp_winbind_sealed_pipes()) {
auth_type = DCERPC_AUTH_LEVEL_PRIVACY;
} else {
auth_type = DCERPC_AUTH_LEVEL_INTEGRITY;
}
if (state->creds == NULL) {
composite_error(state->ctx, NT_STATUS_INTERNAL_ERROR);
return;
}
ctx = dcerpc_bind_auth_send(state, state->samr_pipe,
&dcerpc_table_samr,
state->creds, state->auth_type,
auth_type,
NULL);
composite_continue(state->ctx, ctx,
connect_samr_recv_auth_bind, state);
break;
}
default:
composite_error(state->ctx, NT_STATUS_INTERNAL_ERROR);
}
}
static void connect_samr_recv_anon_bind(struct composite_context *ctx)
{
struct connect_samr_state *state =
talloc_get_type(ctx->async.private_data,
struct connect_samr_state);
struct rpc_request *req;
state->ctx->status = dcerpc_bind_auth_none_recv(ctx);
if (!composite_is_ok(state->ctx)) return;
state->connect_handle = talloc(state, struct policy_handle);
if (composite_nomem(state->connect_handle, state->ctx)) return;
state->c.in.system_name =
talloc_asprintf(state, "\\\\%s",
dcerpc_server_name(state->samr_pipe));
state->c.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
state->c.out.connect_handle = state->connect_handle;
req = dcerpc_samr_Connect2_send(state->samr_pipe, state, &state->c);
composite_continue_rpc(state->ctx, req, connect_samr_recv_conn, state);
}
static void connect_samr_recv_auth_bind(struct composite_context *ctx)
{
struct connect_samr_state *state =
talloc_get_type(ctx->async.private_data,
struct connect_samr_state);
struct rpc_request *req;
state->ctx->status = dcerpc_bind_auth_recv(ctx);
if (!composite_is_ok(state->ctx)) return;
state->connect_handle = talloc(state, struct policy_handle);
if (composite_nomem(state->connect_handle, state->ctx)) return;
state->c.in.system_name =
talloc_asprintf(state, "\\\\%s",
dcerpc_server_name(state->samr_pipe));
state->c.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
state->c.out.connect_handle = state->connect_handle;
req = dcerpc_samr_Connect2_send(state->samr_pipe, state, &state->c);
composite_continue_rpc(state->ctx, req, connect_samr_recv_conn, state);
}
static void connect_samr_recv_conn(struct rpc_request *req)
{
struct connect_samr_state *state =
talloc_get_type(req->async.private,
struct connect_samr_state);
state->ctx->status = dcerpc_ndr_request_recv(req);
if (!composite_is_ok(state->ctx)) return;
state->ctx->status = state->c.out.result;
if (!composite_is_ok(state->ctx)) return;
state->domain_handle = talloc(state, struct policy_handle);
if (composite_nomem(state->domain_handle, state->ctx)) return;
state->o.in.connect_handle = state->connect_handle;
state->o.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
state->o.in.sid = state->sid;
state->o.out.domain_handle = state->domain_handle;
req = dcerpc_samr_OpenDomain_send(state->samr_pipe, state, &state->o);
composite_continue_rpc(state->ctx, req,
connect_samr_recv_open, state);
}
static void connect_samr_recv_open(struct rpc_request *req)
{
struct connect_samr_state *state =
talloc_get_type(req->async.private,
struct connect_samr_state);
state->ctx->status = dcerpc_ndr_request_recv(req);
if (!composite_is_ok(state->ctx)) return;
state->ctx->status = state->o.out.result;
if (!composite_is_ok(state->ctx)) return;
composite_done(state->ctx);
}
NTSTATUS wb_connect_sam_recv(struct composite_context *c,
TALLOC_CTX *mem_ctx,
struct dcerpc_pipe **samr_pipe,
struct policy_handle **connect_handle,
struct policy_handle **domain_handle)
{
NTSTATUS status = composite_wait(c);
if (NT_STATUS_IS_OK(status)) {
struct connect_samr_state *state =
talloc_get_type(c->private_data,
struct connect_samr_state);
*samr_pipe = talloc_steal(mem_ctx, state->samr_pipe);
*connect_handle = talloc_steal(mem_ctx, state->connect_handle);
*domain_handle = talloc_steal(mem_ctx, state->domain_handle);
}
talloc_free(c);
return status;
}
NTSTATUS wb_connect_sam(TALLOC_CTX *mem_ctx,
struct smbcli_tree *tree,
uint8_t auth_type,
struct cli_credentials *creds,
const struct dom_sid *domain_sid,
struct dcerpc_pipe **samr_pipe,
struct policy_handle **connect_handle,
struct policy_handle **domain_handle)
{
struct composite_context *c =
wb_connect_sam_send(mem_ctx, tree, auth_type, creds,
domain_sid);
return wb_connect_sam_recv(c, mem_ctx, samr_pipe, connect_handle,
domain_handle);
}
|
