1 /*
2 * Dropbear - a SSH2 server
3 *
4 * Copyright (c) 2002,2003 Matt Johnston
5 * All rights reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE. */
24
25 #include "includes.h"
26 #include "dbutil.h"
27 #include "service.h"
28 #include "session.h"
29 #include "packet.h"
30 #include "ssh.h"
31 #include "auth.h"
32
33 static void send_msg_service_accept(unsigned char *name, int len);
34
35 /* processes a SSH_MSG_SERVICE_REQUEST, returning 0 if finished,
36 * 1 if not */
recv_msg_service_request()37 void recv_msg_service_request() {
38
39 unsigned char * name;
40 unsigned int len;
41
42 TRACE(("enter recv_msg_service_request"))
43
44 name = buf_getstring(ses.payload, &len);
45
46 /* ssh-userauth */
47 if (len == SSH_SERVICE_USERAUTH_LEN &&
48 strncmp(SSH_SERVICE_USERAUTH, name, len) == 0) {
49
50 send_msg_service_accept(name, len);
51 m_free(name);
52 TRACE(("leave recv_msg_service_request: done ssh-userauth"))
53 return;
54 }
55
56 /* ssh-connection */
57 if (len == SSH_SERVICE_CONNECTION_LEN &&
58 (strncmp(SSH_SERVICE_CONNECTION, name, len) == 0)) {
59 if (ses.authstate.authdone != 1) {
60 dropbear_exit("request for connection before auth");
61 }
62
63 send_msg_service_accept(name, len);
64 m_free(name);
65 TRACE(("leave recv_msg_service_request: done ssh-connection"))
66 return;
67 }
68
69 m_free(name);
70 /* TODO this should be a MSG_DISCONNECT */
71 dropbear_exit("unrecognised SSH_MSG_SERVICE_REQUEST");
72
73
74 }
75
send_msg_service_accept(unsigned char * name,int len)76 static void send_msg_service_accept(unsigned char *name, int len) {
77
78 TRACE(("accepting service %s", name))
79
80 CHECKCLEARTOWRITE();
81
82 buf_putbyte(ses.writepayload, SSH_MSG_SERVICE_ACCEPT);
83 buf_putstring(ses.writepayload, name, len);
84
85 encrypt_packet();
86
87 }
88