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
|
/*
Unix SMB/CIFS implementation.
LDAP server
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 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 "ldap_server/ldap_server.h"
#include "../lib/util/dlinklist.h"
#include "lib/tls/tls.h"
#include "smbd/service_stream.h"
#include "../lib/util/tevent_ntstatus.h"
struct ldapsrv_starttls_postprocess_context {
struct ldapsrv_connection *conn;
};
struct ldapsrv_starttls_postprocess_state {
struct ldapsrv_connection *conn;
};
static void ldapsrv_starttls_postprocess_done(struct tevent_req *subreq);
static struct tevent_req *ldapsrv_starttls_postprocess_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
void *private_data)
{
struct ldapsrv_starttls_postprocess_context *context =
talloc_get_type_abort(private_data,
struct ldapsrv_starttls_postprocess_context);
struct ldapsrv_connection *conn = context->conn;
struct tevent_req *req;
struct ldapsrv_starttls_postprocess_state *state;
struct tevent_req *subreq;
req = tevent_req_create(mem_ctx, &state,
struct ldapsrv_starttls_postprocess_state);
if (req == NULL) {
return NULL;
}
state->conn = conn;
subreq = tstream_tls_accept_send(conn,
conn->connection->event.ctx,
conn->sockets.raw,
conn->service->tls_params);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, ldapsrv_starttls_postprocess_done, req);
return req;
}
static void ldapsrv_starttls_postprocess_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct ldapsrv_starttls_postprocess_state *state =
tevent_req_data(req,
struct ldapsrv_starttls_postprocess_state);
struct ldapsrv_connection *conn = state->conn;
int ret;
int sys_errno;
ret = tstream_tls_accept_recv(subreq, &sys_errno,
conn, &conn->sockets.tls);
TALLOC_FREE(subreq);
if (ret == -1) {
NTSTATUS status = map_nt_error_from_unix_common(sys_errno);
DEBUG(1,("ldapsrv_starttls_postprocess_done: accept_tls_loop: "
"tstream_tls_accept_recv() - %d:%s => %s",
sys_errno, strerror(sys_errno), nt_errstr(status)));
tevent_req_nterror(req, status);
return;
}
conn->sockets.active = conn->sockets.tls;
tevent_req_done(req);
}
static NTSTATUS ldapsrv_starttls_postprocess_recv(struct tevent_req *req)
{
return tevent_req_simple_recv_ntstatus(req);
}
static NTSTATUS ldapsrv_StartTLS(struct ldapsrv_call *call,
struct ldapsrv_reply *reply,
const char **errstr)
{
struct ldapsrv_starttls_postprocess_context *context;
(*errstr) = NULL;
/*
* TODO: give LDAP_OPERATIONS_ERROR also when
* there's a SASL bind in progress
* (see rfc4513 section 3.1.1)
*/
if (call->conn->sockets.tls) {
(*errstr) = talloc_asprintf(reply, "START-TLS: TLS is already enabled on this LDAP session");
return NT_STATUS_LDAP(LDAP_OPERATIONS_ERROR);
}
if (call->conn->sockets.sasl) {
(*errstr) = talloc_asprintf(reply, "START-TLS: SASL is already enabled on this LDAP session");
return NT_STATUS_LDAP(LDAP_OPERATIONS_ERROR);
}
if (call->conn->pending_calls != NULL) {
(*errstr) = talloc_asprintf(reply, "START-TLS: pending requests on this LDAP session");
return NT_STATUS_LDAP(LDAP_BUSY);
}
context = talloc(call, struct ldapsrv_starttls_postprocess_context);
NT_STATUS_HAVE_NO_MEMORY(context);
context->conn = call->conn;
call->postprocess_send = ldapsrv_starttls_postprocess_send;
call->postprocess_recv = ldapsrv_starttls_postprocess_recv;
call->postprocess_private = context;
reply->msg->r.ExtendedResponse.response.resultcode = LDAP_SUCCESS;
reply->msg->r.ExtendedResponse.response.errormessage = NULL;
ldapsrv_queue_reply(call, reply);
return NT_STATUS_OK;
}
struct ldapsrv_extended_operation {
const char *oid;
NTSTATUS (*fn)(struct ldapsrv_call *call, struct ldapsrv_reply *reply, const char **errorstr);
};
static struct ldapsrv_extended_operation extended_ops[] = {
{
.oid = LDB_EXTENDED_START_TLS_OID,
.fn = ldapsrv_StartTLS,
},{
.oid = NULL,
.fn = NULL,
}
};
NTSTATUS ldapsrv_ExtendedRequest(struct ldapsrv_call *call)
{
struct ldap_ExtendedRequest *req = &call->request->r.ExtendedRequest;
struct ldapsrv_reply *reply;
int result = LDAP_PROTOCOL_ERROR;
const char *error_str = NULL;
NTSTATUS status = NT_STATUS_OK;
unsigned int i;
DEBUG(10, ("Extended\n"));
reply = ldapsrv_init_reply(call, LDAP_TAG_ExtendedResponse);
NT_STATUS_HAVE_NO_MEMORY(reply);
ZERO_STRUCT(reply->msg->r);
reply->msg->r.ExtendedResponse.oid = talloc_steal(reply, req->oid);
reply->msg->r.ExtendedResponse.response.resultcode = LDAP_PROTOCOL_ERROR;
reply->msg->r.ExtendedResponse.response.errormessage = NULL;
for (i=0; extended_ops[i].oid; i++) {
if (strcmp(extended_ops[i].oid,req->oid) != 0) continue;
/*
* if the backend function returns an error we
* need to send the reply otherwise the reply is already
* send and we need to return directly
*/
status = extended_ops[i].fn(call, reply, &error_str);
if (NT_STATUS_IS_OK(status)) {
return status;
}
if (NT_STATUS_IS_LDAP(status)) {
result = NT_STATUS_LDAP_CODE(status);
} else {
result = LDAP_OPERATIONS_ERROR;
error_str = talloc_asprintf(reply, "Extended Operation(%s) failed: %s",
req->oid, nt_errstr(status));
}
}
/* if we haven't found the oid, then status is still NT_STATUS_OK */
if (NT_STATUS_IS_OK(status)) {
error_str = talloc_asprintf(reply, "Extended Operation(%s) not supported",
req->oid);
}
reply->msg->r.ExtendedResponse.response.resultcode = result;
reply->msg->r.ExtendedResponse.response.errormessage = error_str;
ldapsrv_queue_reply(call, reply);
return NT_STATUS_OK;
}
|
