annotate cli-session.c @ 1071:696205e3dc99 pam

Remove ATTRIB_NORETURN from session_loop() since it returns. The stack breaks pretty badly.
author Matt Johnston <matt@ucc.asn.au>
date Tue, 17 Mar 2015 21:58:32 +0800
parents 16379795f80b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
74
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
1 /*
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
2 * Dropbear SSH
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
3 *
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
4 * Copyright (c) 2002,2003 Matt Johnston
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
5 * Copyright (c) 2004 by Mihnea Stoenescu
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
6 * All rights reserved.
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
7 *
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
9 * of this software and associated documentation files (the "Software"), to deal
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
10 * in the Software without restriction, including without limitation the rights
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
12 * copies of the Software, and to permit persons to whom the Software is
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
13 * furnished to do so, subject to the following conditions:
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
14 *
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
15 * The above copyright notice and this permission notice shall be included in
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
16 * all copies or substantial portions of the Software.
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
17 *
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
24 * SOFTWARE. */
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
25
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
26 #include "includes.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
27 #include "session.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
28 #include "dbutil.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
29 #include "kex.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
30 #include "ssh.h"
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
31 #include "packet.h"
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
32 #include "tcpfwd.h"
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
33 #include "channel.h"
858
220f55d540ae rename random.h to dbrandom.h since some OSes have a system random.h
Matt Johnston <matt@ucc.asn.au>
parents: 857
diff changeset
34 #include "dbrandom.h"
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
35 #include "service.h"
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
36 #include "runopts.h"
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
37 #include "chansession.h"
547
cf376c696dfc Make it compile, update for changes in channel structure.
Matt Johnston <matt@ucc.asn.au>
parents: 546
diff changeset
38 #include "agentfwd.h"
766
d1575fdc29a6 start on ecdsa keys
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
39 #include "crypto_desc.h"
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents: 1031
diff changeset
40 #include "netio.h"
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
41
1043
38d2f6b2d1b8 Add more ATTRIB_NORETURN annotations, from Thorsten Horstmann
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
42 static void cli_remoteclosed() ATTRIB_NORETURN;
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
43 static void cli_sessionloop();
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
44 static void cli_session_init();
1043
38d2f6b2d1b8 Add more ATTRIB_NORETURN annotations, from Thorsten Horstmann
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
45 static void cli_finished() ATTRIB_NORETURN;
727
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
46 static void recv_msg_service_accept(void);
733
70811267715c Run the cleanup handler also when we close due to TCP connection being closed
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
47 static void cli_session_cleanup(void);
937
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
48 static void recv_msg_global_request_cli(void);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
49
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
50 struct clientsession cli_ses; /* GLOBAL */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
51
45
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents: 43
diff changeset
52 /* Sorted in decreasing frequency will be more efficient - data and window
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents: 43
diff changeset
53 * should be first */
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
54 static const packettype cli_packettypes[] = {
74
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
55 /* TYPE, FUNCTION */
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
56 {SSH_MSG_CHANNEL_DATA, recv_msg_channel_data},
107
Matt Johnston <matt@ucc.asn.au>
parents: 100
diff changeset
57 {SSH_MSG_CHANNEL_EXTENDED_DATA, recv_msg_channel_extended_data},
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
58 {SSH_MSG_CHANNEL_WINDOW_ADJUST, recv_msg_channel_window_adjust},
45
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents: 43
diff changeset
59 {SSH_MSG_USERAUTH_FAILURE, recv_msg_userauth_failure}, /* client */
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents: 43
diff changeset
60 {SSH_MSG_USERAUTH_SUCCESS, recv_msg_userauth_success}, /* client */
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents: 43
diff changeset
61 {SSH_MSG_KEXINIT, recv_msg_kexinit},
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents: 43
diff changeset
62 {SSH_MSG_KEXDH_REPLY, recv_msg_kexdh_reply}, /* client */
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents: 43
diff changeset
63 {SSH_MSG_NEWKEYS, recv_msg_newkeys},
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents: 43
diff changeset
64 {SSH_MSG_SERVICE_ACCEPT, recv_msg_service_accept}, /* client */
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
65 {SSH_MSG_CHANNEL_REQUEST, recv_msg_channel_request},
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
66 {SSH_MSG_CHANNEL_OPEN, recv_msg_channel_open},
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
67 {SSH_MSG_CHANNEL_EOF, recv_msg_channel_eof},
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
68 {SSH_MSG_CHANNEL_CLOSE, recv_msg_channel_close},
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
69 {SSH_MSG_CHANNEL_OPEN_CONFIRMATION, recv_msg_channel_open_confirmation},
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
70 {SSH_MSG_CHANNEL_OPEN_FAILURE, recv_msg_channel_open_failure},
45
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents: 43
diff changeset
71 {SSH_MSG_USERAUTH_BANNER, recv_msg_userauth_banner}, /* client */
249
efbaf6b03837 added keyboard-interactive client support
Matt Johnston <matt@ucc.asn.au>
parents: 215
diff changeset
72 {SSH_MSG_USERAUTH_SPECIFIC_60, recv_msg_userauth_specific_60}, /* client */
937
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
73 {SSH_MSG_GLOBAL_REQUEST, recv_msg_global_request_cli},
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
74 {SSH_MSG_CHANNEL_SUCCESS, ignore_recv_response},
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
75 {SSH_MSG_CHANNEL_FAILURE, ignore_recv_response},
505
805e557fdff7 Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents: 486
diff changeset
76 #ifdef ENABLE_CLI_REMOTETCPFWD
805e557fdff7 Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents: 486
diff changeset
77 {SSH_MSG_REQUEST_SUCCESS, cli_recv_msg_request_success}, /* client */
805e557fdff7 Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents: 486
diff changeset
78 {SSH_MSG_REQUEST_FAILURE, cli_recv_msg_request_failure}, /* client */
968
f7f6c15b0ec3 Don't send SSH_MSG_UNIMPLEMENTED for keepalive responses
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
79 #else
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
80 /* For keepalive */
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
81 {SSH_MSG_REQUEST_SUCCESS, ignore_recv_response},
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
82 {SSH_MSG_REQUEST_FAILURE, ignore_recv_response},
505
805e557fdff7 Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents: 486
diff changeset
83 #endif
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
84 {0, 0} /* End */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
85 };
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
86
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
87 static const struct ChanType *cli_chantypes[] = {
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
88 #ifdef ENABLE_CLI_REMOTETCPFWD
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
89 &cli_chan_tcpremote,
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
90 #endif
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 215
diff changeset
91 #ifdef ENABLE_CLI_AGENTFWD
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 215
diff changeset
92 &cli_chan_agent,
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 215
diff changeset
93 #endif
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
94 NULL /* Null termination */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
95 };
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
96
1025
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
97 void cli_connected(int result, int sock, void* userdata, const char *errstring)
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
98 {
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents: 1031
diff changeset
99 struct sshsession *myses = userdata;
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents: 1031
diff changeset
100 if (result == DROPBEAR_FAILURE) {
1025
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
101 dropbear_exit("Connect failed: %s", errstring);
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
102 }
1032
0da8ba489c23 Move generic network routines to netio.c
Matt Johnston <matt@ucc.asn.au>
parents: 1031
diff changeset
103 myses->sock_in = myses->sock_out = sock;
1031
64c0aa01e2b6 Update priority once the socket is open
Matt Johnston <matt@ucc.asn.au>
parents: 1027
diff changeset
104 update_channel_prio();
1025
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
105 }
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
106
1027
daf21fd50abf In theory TFO should work. Needs platform cleanup and testing
Matt Johnston <matt@ucc.asn.au>
parents: 1025
diff changeset
107 void cli_session(int sock_in, int sock_out, struct dropbear_progress_connection *progress) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
108
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 560
diff changeset
109 common_session_init(sock_in, sock_out);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
110
1027
daf21fd50abf In theory TFO should work. Needs platform cleanup and testing
Matt Johnston <matt@ucc.asn.au>
parents: 1025
diff changeset
111 if (progress) {
daf21fd50abf In theory TFO should work. Needs platform cleanup and testing
Matt Johnston <matt@ucc.asn.au>
parents: 1025
diff changeset
112 connect_set_writequeue(progress, &ses.writequeue);
daf21fd50abf In theory TFO should work. Needs platform cleanup and testing
Matt Johnston <matt@ucc.asn.au>
parents: 1025
diff changeset
113 }
daf21fd50abf In theory TFO should work. Needs platform cleanup and testing
Matt Johnston <matt@ucc.asn.au>
parents: 1025
diff changeset
114
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
115 chaninitialise(cli_chantypes);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
116
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
117 /* Set up cli_ses vars */
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
118 cli_session_init();
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
119
1027
daf21fd50abf In theory TFO should work. Needs platform cleanup and testing
Matt Johnston <matt@ucc.asn.au>
parents: 1025
diff changeset
120
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
121 /* Ready to go */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
122 sessinitdone = 1;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
123
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
124 /* Exchange identification */
726
78eda530c000 send out our kexinit packet before blocking to read the SSH version string
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
125 send_session_identification();
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
126
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
127 send_msg_kexinit();
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
128
1070
16379795f80b Fix merge again. ses.loop_handler is required for PAM
Matt Johnston <matt@ucc.asn.au>
parents: 1069
diff changeset
129 session_loop();
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
130
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
131 /* Not reached */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
132
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
133 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
134
746
465fefc4f6e0 Put some #ifdef options around first-follows options in case they
Matt Johnston <matt@ucc.asn.au>
parents: 745
diff changeset
135 #ifdef USE_KEX_FIRST_FOLLOWS
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
136 static void cli_send_kex_first_guess() {
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
137 send_msg_kexdh_init();
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
138 }
746
465fefc4f6e0 Put some #ifdef options around first-follows options in case they
Matt Johnston <matt@ucc.asn.au>
parents: 745
diff changeset
139 #endif
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
140
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
141 static void cli_session_init() {
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
142
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
143 cli_ses.state = STATE_NOTHING;
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
144 cli_ses.kex_state = KEX_NOTHING;
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
145
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents: 37
diff changeset
146 cli_ses.tty_raw_mode = 0;
41
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
147 cli_ses.winchange = 0;
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents: 37
diff changeset
148
175
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
149 /* We store std{in,out,err}'s flags, so we can set them back on exit
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
150 * (otherwise busybox's ash isn't happy */
99
0247fbd9379d Move the revert-to-non-blocking-stdin code to cli-session so it
Matt Johnston <matt@ucc.asn.au>
parents: 74
diff changeset
151 cli_ses.stdincopy = dup(STDIN_FILENO);
0247fbd9379d Move the revert-to-non-blocking-stdin code to cli-session so it
Matt Johnston <matt@ucc.asn.au>
parents: 74
diff changeset
152 cli_ses.stdinflags = fcntl(STDIN_FILENO, F_GETFL, 0);
175
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
153 cli_ses.stdoutcopy = dup(STDOUT_FILENO);
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
154 cli_ses.stdoutflags = fcntl(STDOUT_FILENO, F_GETFL, 0);
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
155 cli_ses.stderrcopy = dup(STDERR_FILENO);
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
156 cli_ses.stderrflags = fcntl(STDERR_FILENO, F_GETFL, 0);
99
0247fbd9379d Move the revert-to-non-blocking-stdin code to cli-session so it
Matt Johnston <matt@ucc.asn.au>
parents: 74
diff changeset
157
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
158 cli_ses.retval = EXIT_SUCCESS; /* Assume it's clean if we don't get a
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
159 specific exit status */
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
160
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
161 /* Auth */
215
aad4b3f58556 rename PubkeyList to SignKeyList for clarity
Matt Johnston <matt@ucc.asn.au>
parents: 175
diff changeset
162 cli_ses.lastprivkey = NULL;
136
fb7147e2fb04 - Fixed a couple of compile warnings
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
163 cli_ses.lastauthtype = 0;
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
164
686
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
165 #ifdef DROPBEAR_NONE_CIPHER
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
166 cli_ses.cipher_none_after_auth = get_algo_usable(sshciphers, "none");
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
167 set_algo_usable(sshciphers, "none", 0);
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
168 #else
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
169 cli_ses.cipher_none_after_auth = 0;
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
170 #endif
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
171
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
172 /* For printing "remote host closed" for the user */
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
173 ses.remoteclosed = cli_remoteclosed;
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
174
925
bae0b34bc059 Better PAM through recursion
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
175 ses.loop_handler = cli_sessionloop;
733
70811267715c Run the cleanup handler also when we close due to TCP connection being closed
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
176 ses.extra_session_cleanup = cli_session_cleanup;
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
177
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
178 /* packet handlers */
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
179 ses.packettypes = cli_packettypes;
35
0ad5fb979f42 set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
180
0ad5fb979f42 set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
181 ses.isserver = 0;
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
182
746
465fefc4f6e0 Put some #ifdef options around first-follows options in case they
Matt Johnston <matt@ucc.asn.au>
parents: 745
diff changeset
183 #ifdef USE_KEX_FIRST_FOLLOWS
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
184 ses.send_kex_first_guess = cli_send_kex_first_guess;
746
465fefc4f6e0 Put some #ifdef options around first-follows options in case they
Matt Johnston <matt@ucc.asn.au>
parents: 745
diff changeset
185 #endif
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
186
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
187 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
188
727
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
189 static void send_msg_service_request(char* servicename) {
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
190
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
191 TRACE(("enter send_msg_service_request: servicename='%s'", servicename))
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
192
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
193 CHECKCLEARTOWRITE();
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
194
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
195 buf_putbyte(ses.writepayload, SSH_MSG_SERVICE_REQUEST);
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
196 buf_putstring(ses.writepayload, servicename, strlen(servicename));
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
197
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
198 encrypt_packet();
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
199 TRACE(("leave send_msg_service_request"))
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
200 }
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
201
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
202 static void recv_msg_service_accept(void) {
857
c19acba28590 use oldstyle comments
Matt Johnston <matt@ucc.asn.au>
parents: 801
diff changeset
203 /* do nothing, if it failed then the server MUST have disconnected */
727
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
204 }
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
205
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
206 /* This function drives the progress of the session - it initiates KEX,
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
207 * service, userauth and channel requests */
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
208 static void cli_sessionloop() {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
209
731
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
Matt Johnston <matt@ucc.asn.au>
parents: 727
diff changeset
210 TRACE2(("enter cli_sessionloop"))
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
211
745
15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet
Matt Johnston <matt@ucc.asn.au>
parents: 743
diff changeset
212 if (ses.lastpacket == 0) {
15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet
Matt Johnston <matt@ucc.asn.au>
parents: 743
diff changeset
213 TRACE2(("exit cli_sessionloop: no real packets yet"))
15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet
Matt Johnston <matt@ucc.asn.au>
parents: 743
diff changeset
214 return;
15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet
Matt Johnston <matt@ucc.asn.au>
parents: 743
diff changeset
215 }
15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet
Matt Johnston <matt@ucc.asn.au>
parents: 743
diff changeset
216
34
e2a1eaa19f22 Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
217 if (ses.lastpacket == SSH_MSG_KEXINIT && cli_ses.kex_state == KEX_NOTHING) {
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
218 /* We initiate the KEXDH. If DH wasn't the correct type, the KEXINIT
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
219 * negotiation would have failed. */
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
220 if (!ses.kexstate.our_first_follows_matches) {
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
221 send_msg_kexdh_init();
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
222 }
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
223 cli_ses.kex_state = KEXDH_INIT_SENT;
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 136
diff changeset
224 TRACE(("leave cli_sessionloop: done with KEXINIT_RCVD"))
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
225 return;
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
226 }
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
227
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
228 /* A KEX has finished, so we should go back to our KEX_NOTHING state */
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 750
diff changeset
229 if (cli_ses.kex_state != KEX_NOTHING && ses.kexstate.sentnewkeys) {
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
230 cli_ses.kex_state = KEX_NOTHING;
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
231 }
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
232
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
233 /* We shouldn't do anything else if a KEX is in progress */
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
234 if (cli_ses.kex_state != KEX_NOTHING) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 136
diff changeset
235 TRACE(("leave cli_sessionloop: kex_state != KEX_NOTHING"))
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
236 return;
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
237 }
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
238
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
239 if (ses.kexstate.donefirstkex == 0) {
745
15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet
Matt Johnston <matt@ucc.asn.au>
parents: 743
diff changeset
240 /* We might reach here if we have partial packet reads or have
15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet
Matt Johnston <matt@ucc.asn.au>
parents: 743
diff changeset
241 * received SSG_MSG_IGNORE etc. Just skip it */
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 750
diff changeset
242 TRACE2(("donefirstkex false\n"))
34
e2a1eaa19f22 Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
243 return;
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
244 }
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
245
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
246 switch (cli_ses.state) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
247
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
248 case STATE_NOTHING:
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
249 /* We've got the transport layer sorted, we now need to request
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
250 * userauth */
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
251 send_msg_service_request(SSH_SERVICE_USERAUTH);
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
252 cli_auth_getmethods();
45
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents: 43
diff changeset
253 cli_ses.state = USERAUTH_REQ_SENT;
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 136
diff changeset
254 TRACE(("leave cli_sessionloop: sent userauth methods req"))
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
255 return;
883
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
256
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
257 case USERAUTH_REQ_SENT:
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
258 TRACE(("leave cli_sessionloop: waiting, req_sent"))
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
259 return;
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
260
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
261 case USERAUTH_FAIL_RCVD:
734
619b1ed837fd Be a bit more careful about when we want to use CLI_AUTH_IMMEDIATE
Matt Johnston <matt@ucc.asn.au>
parents: 733
diff changeset
262 if (cli_auth_try() == DROPBEAR_FAILURE) {
619b1ed837fd Be a bit more careful about when we want to use CLI_AUTH_IMMEDIATE
Matt Johnston <matt@ucc.asn.au>
parents: 733
diff changeset
263 dropbear_exit("No auth methods could be used.");
619b1ed837fd Be a bit more careful about when we want to use CLI_AUTH_IMMEDIATE
Matt Johnston <matt@ucc.asn.au>
parents: 733
diff changeset
264 }
45
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents: 43
diff changeset
265 cli_ses.state = USERAUTH_REQ_SENT;
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 136
diff changeset
266 TRACE(("leave cli_sessionloop: cli_auth_try"))
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
267 return;
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
268
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
269 case USERAUTH_SUCCESS_RCVD:
326
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
270
686
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
271 #ifdef DROPBEAR_NONE_CIPHER
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
272 if (cli_ses.cipher_none_after_auth)
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
273 {
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
274 set_algo_usable(sshciphers, "none", 1);
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
275 send_msg_kexinit();
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
276 }
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
277 #endif
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
278
326
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
279 if (cli_opts.backgrounded) {
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
280 int devnull;
433
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 326
diff changeset
281 /* keeping stdin open steals input from the terminal and
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 326
diff changeset
282 is confusing, though stdout/stderr could be useful. */
326
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
283 devnull = open(_PATH_DEVNULL, O_RDONLY);
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
284 if (devnull < 0) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 568
diff changeset
285 dropbear_exit("Opening /dev/null: %d %s",
326
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
286 errno, strerror(errno));
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
287 }
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
288 dup2(devnull, STDIN_FILENO);
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
289 if (daemon(0, 1) < 0) {
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
290 dropbear_exit("Backgrounding failed: %d %s",
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
291 errno, strerror(errno));
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
292 }
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
293 }
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
294
485
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
295 #ifdef ENABLE_CLI_NETCAT
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
296 if (cli_opts.netcat_host) {
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
297 cli_send_netcat_request();
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
298 } else
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
299 #endif
560
52d7301e46bd Agent forwarding works
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
300 if (!cli_opts.no_cmd) {
325
0e4f225b7e07 Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents: 272
diff changeset
301 cli_send_chansess_request();
0e4f225b7e07 Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents: 272
diff changeset
302 }
754
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
303
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
304 #ifdef ENABLE_CLI_LOCALTCPFWD
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
305 setup_localtcp();
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
306 #endif
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
307 #ifdef ENABLE_CLI_REMOTETCPFWD
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
308 setup_remotetcp();
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
309 #endif
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
310
325
0e4f225b7e07 Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents: 272
diff changeset
311 TRACE(("leave cli_sessionloop: running"))
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
312 cli_ses.state = SESSION_RUNNING;
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
313 return;
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
314
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
315 case SESSION_RUNNING:
325
0e4f225b7e07 Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents: 272
diff changeset
316 if (ses.chancount < 1 && !cli_opts.no_cmd) {
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
317 cli_finished();
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
318 }
41
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
319
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
320 if (cli_ses.winchange) {
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
321 cli_chansess_winchange();
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
322 }
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
323 return;
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
324
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
325 /* XXX more here needed */
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
326
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
327
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
328 default:
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
329 break;
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
330 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
331
731
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
Matt Johnston <matt@ucc.asn.au>
parents: 727
diff changeset
332 TRACE2(("leave cli_sessionloop: fell out"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
333
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
334 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
335
733
70811267715c Run the cleanup handler also when we close due to TCP connection being closed
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
336 static void cli_session_cleanup(void) {
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
337
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
338 if (!sessinitdone) {
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
339 return;
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
340 }
99
0247fbd9379d Move the revert-to-non-blocking-stdin code to cli-session so it
Matt Johnston <matt@ucc.asn.au>
parents: 74
diff changeset
341
175
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
342 /* Set std{in,out,err} back to non-blocking - busybox ash dies nastily if
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
343 * we don't revert the flags */
100
c72f5c10125d oops, the fcntl() was commented out
Matt Johnston <matt@ucc.asn.au>
parents: 99
diff changeset
344 fcntl(cli_ses.stdincopy, F_SETFL, cli_ses.stdinflags);
175
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
345 fcntl(cli_ses.stdoutcopy, F_SETFL, cli_ses.stdoutflags);
2c5741e4b855 * Reset the non-blocking status of stdout and stderr as well on exit
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
346 fcntl(cli_ses.stderrcopy, F_SETFL, cli_ses.stderrflags);
99
0247fbd9379d Move the revert-to-non-blocking-stdin code to cli-session so it
Matt Johnston <matt@ucc.asn.au>
parents: 74
diff changeset
347
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
348 cli_tty_cleanup();
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
349
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
350 }
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
351
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
352 static void cli_finished() {
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
353
733
70811267715c Run the cleanup handler also when we close due to TCP connection being closed
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
354 session_cleanup();
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
355 fprintf(stderr, "Connection to %s@%s:%s closed.\n", cli_opts.username,
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
356 cli_opts.remotehost, cli_opts.remoteport);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
357 exit(cli_ses.retval);
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
358 }
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
359
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
360
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
361 /* called when the remote side closes the connection */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
362 static void cli_remoteclosed() {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
363
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
364 /* XXX TODO perhaps print a friendlier message if we get this but have
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
365 * already sent/received disconnect message(s) ??? */
479
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
366 m_close(ses.sock_in);
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
367 m_close(ses.sock_out);
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
368 ses.sock_in = -1;
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
369 ses.sock_out = -1;
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 568
diff changeset
370 dropbear_exit("Remote closed the connection");
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
371 }
43
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
372
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
373 /* Operates in-place turning dirty (untrusted potentially containing control
249
efbaf6b03837 added keyboard-interactive client support
Matt Johnston <matt@ucc.asn.au>
parents: 215
diff changeset
374 * characters) text into clean text.
efbaf6b03837 added keyboard-interactive client support
Matt Johnston <matt@ucc.asn.au>
parents: 215
diff changeset
375 * Note: this is safe only with ascii - other charsets could have problems. */
43
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
376 void cleantext(unsigned char* dirtytext) {
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
377
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
378 unsigned int i, j;
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
379 unsigned char c;
43
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
380
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
381 j = 0;
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
382 for (i = 0; dirtytext[i] != '\0'; i++) {
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
383
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
384 c = dirtytext[i];
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
385 /* We can ignore '\r's */
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
386 if ( (c >= ' ' && c <= '~') || c == '\n' || c == '\t') {
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
387 dirtytext[j] = c;
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
388 j++;
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
389 }
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
390 }
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
391 /* Null terminate */
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
392 dirtytext[j] = '\0';
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
393 }
937
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
394
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
395 static void recv_msg_global_request_cli(void) {
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
396 TRACE(("recv_msg_global_request_cli"))
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
397 /* Send a proper rejection */
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
398 send_msg_request_failure();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
399 }