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
|
/*
* Dropbear - a SSH2 server
*
* Copyright (c) 2002,2003 Matt Johnston
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE. */
#include "includes.h"
#include "dbutil.h"
#include "service.h"
#include "session.h"
#include "packet.h"
#include "ssh.h"
#include "auth.h"
static void send_msg_service_accept(unsigned char *name, int len);
/* processes a SSH_MSG_SERVICE_REQUEST, returning 0 if finished,
* 1 if not */
void recv_msg_service_request() {
unsigned char * name;
unsigned int len;
TRACE(("enter recv_msg_service_request"));
name = buf_getstring(ses.payload, &len);
/* ssh-userauth */
if (len == SSH_SERVICE_USERAUTH_LEN &&
strncmp(SSH_SERVICE_USERAUTH, name, len) == 0) {
send_msg_service_accept(name, len);
m_free(name);
TRACE(("leave recv_msg_service_request: done ssh-userauth"));
return;
}
/* ssh-connection */
if (len == SSH_SERVICE_CONNECTION_LEN &&
(strncmp(SSH_SERVICE_CONNECTION, name, len) == 0)) {
if (ses.authstate.authdone != 1) {
dropbear_exit("request for connection before auth");
}
send_msg_service_accept(name, len);
m_free(name);
TRACE(("leave recv_msg_service_request: done ssh-connection"));
return;
}
m_free(name);
/* TODO this should be a MSG_DISCONNECT */
dropbear_exit("unrecognised SSH_MSG_SERVICE_REQUEST");
}
static void send_msg_service_accept(unsigned char *name, int len) {
TRACE(("accepting service %s", name));
CHECKCLEARTOWRITE();
buf_putbyte(ses.writepayload, SSH_MSG_SERVICE_ACCEPT);
buf_putstring(ses.writepayload, name, len);
encrypt_packet();
}
|
