dropbear: cli-session.c annotate

annotate cli-session.c @ 1176:424822a6f8ee

Mention "dropbear -R" if no hostkeys

author	Matt Johnston <matt@ucc.asn.au>
date	Wed, 25 Nov 2015 23:05:14 +0800
parents	6aeadee3f16b
children	fb58cf341951

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 d3eb1fa8484e Nasty. 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
1083 8e0280986710 Make sure kexfirstinitialise is called early enough Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	127 kexfirstinitialise(); /* initialise the kex state */
8e0280986710 Make sure kexfirstinitialise is called early enough Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	128
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129 send_msg_kexinit();
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 session_loop(cli_sessionloop);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	133 /* Not reached */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	134
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	135 }
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	136
746 465fefc4f6e0 Put some #ifdef options around first-follows options in case they Matt Johnston <matt@ucc.asn.au> parents: 745 diff changeset	137 #ifdef USE_KEX_FIRST_FOLLOWS
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	138 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	139 send_msg_kexdh_init();
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	140 }
746 465fefc4f6e0 Put some #ifdef options around first-follows options in case they Matt Johnston <matt@ucc.asn.au> parents: 745 diff changeset	141 #endif
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	142
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	143 static void cli_session_init() {
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	144
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	145 cli_ses.state = STATE_NOTHING;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	146 cli_ses.kex_state = KEX_NOTHING;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	147
39 0883c0906870 tty raw mode support works mostly Matt Johnston <matt@ucc.asn.au> parents: 37 diff changeset	148 cli_ses.tty_raw_mode = 0;
41 18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	149 cli_ses.winchange = 0;
39 0883c0906870 tty raw mode support works mostly Matt Johnston <matt@ucc.asn.au> parents: 37 diff changeset	150
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	151 /* 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	152 * (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	153 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	154 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	155 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	156 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	157 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	158 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	159
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	160 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	161 specific exit status */
10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	162
47 4b53a43f0082 - client pubkey auth works Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	163 /* Auth */
215 aad4b3f58556 rename PubkeyList to SignKeyList for clarity Matt Johnston <matt@ucc.asn.au> parents: 175 diff changeset	164 cli_ses.lastprivkey = NULL;
136 fb7147e2fb04 - Fixed a couple of compile warnings Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	165 cli_ses.lastauthtype = 0;
47 4b53a43f0082 - client pubkey auth works Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	166
686 983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	167 #ifdef DROPBEAR_NONE_CIPHER
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	168 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	169 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	170 #else
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	171 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	172 #endif
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	173
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	174 /* For printing "remote host closed" for the user */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	175 ses.remoteclosed = cli_remoteclosed;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	176
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	177 ses.extra_session_cleanup = cli_session_cleanup;
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	178
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	179 /* packet handlers */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	180 ses.packettypes = cli_packettypes;
35 0ad5fb979f42 set the isserver flag (oops) Matt Johnston <matt@ucc.asn.au> parents: 34 diff changeset	181
0ad5fb979f42 set the isserver flag (oops) Matt Johnston <matt@ucc.asn.au> parents: 34 diff changeset	182 ses.isserver = 0;
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	183
746 465fefc4f6e0 Put some #ifdef options around first-follows options in case they Matt Johnston <matt@ucc.asn.au> parents: 745 diff changeset	184 #ifdef USE_KEX_FIRST_FOLLOWS
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	185 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	186 #endif
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	187
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	188 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	189
727 00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	190 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	191
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	192 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	193
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	194 CHECKCLEARTOWRITE();
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	195
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_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	197 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	198
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	199 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	200 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	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
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	203 static void recv_msg_service_accept(void) {
857 c19acba28590 use oldstyle comments Matt Johnston <matt@ucc.asn.au> parents: 801 diff changeset	204 /* 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	205 }
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	206
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	207 /* 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	208 * service, userauth and channel requests */
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	209 static void cli_sessionloop() {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	210
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 727 diff changeset	211 TRACE2(("enter cli_sessionloop"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	212
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	213 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	214 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	215 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	216 }
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	217
34 e2a1eaa19f22 Client mostly works up to password auth Matt Johnston <matt@ucc.asn.au> parents: 33 diff changeset	218 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	219 /* 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	220 * negotiation would have failed. */
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	221 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	222 send_msg_kexdh_init();
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	223 }
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 686 diff changeset	224 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	225 TRACE(("leave cli_sessionloop: done with KEXINIT_RCVD"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	226 return;
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
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	229 /* 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	230 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	231 cli_ses.kex_state = KEX_NOTHING;
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
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	234 /* 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	235 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	236 TRACE(("leave cli_sessionloop: kex_state != KEX_NOTHING"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	237 return;
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
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	240 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	241 /* 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	242 * 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	243 TRACE2(("donefirstkex false\n"))
34 e2a1eaa19f22 Client mostly works up to password auth Matt Johnston <matt@ucc.asn.au> parents: 33 diff changeset	244 return;
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	245 }
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	246
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	247 switch (cli_ses.state) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	248
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	249 case STATE_NOTHING:
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	250 /* 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	251 * userauth */
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	252 send_msg_service_request(SSH_SERVICE_USERAUTH);
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	253 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	254 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	255 TRACE(("leave cli_sessionloop: sent userauth methods req"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	256 return;
883 ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	257
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	258 case USERAUTH_REQ_SENT:
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	259 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	260 return;
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	261
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	262 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	263 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	264 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	265 }
45 9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 43 diff changeset	266 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	267 TRACE(("leave cli_sessionloop: cli_auth_try"))
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	268 return;
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	269
37 0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	270 case USERAUTH_SUCCESS_RCVD:
326 d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	271
686 983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	272 #ifdef DROPBEAR_NONE_CIPHER
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	273 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	274 {
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	275 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	276 send_msg_kexinit();
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	277 }
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	278 #endif
983a817f8e41 - Only request "none" cipher after auth has succeeded Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	279
326 d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	280 if (cli_opts.backgrounded) {
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	281 int devnull;
433 c216212001fc Fix for -pedantic -ansi compilation, change // to /*/, plus some signedness Matt Johnston <matt@ucc.asn.au>* parents: 326 diff changeset	282 /* 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	283 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	284 devnull = open(_PATH_DEVNULL, O_RDONLY);
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	285 if (devnull < 0) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	286 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	287 errno, strerror(errno));
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	288 }
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	289 dup2(devnull, STDIN_FILENO);
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	290 if (daemon(0, 1) < 0) {
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	291 dropbear_exit("Backgrounding failed: %d %s",
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	292 errno, strerror(errno));
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 }
d965110e3f5c add -f background option to dbclient Matt Johnston <matt@ucc.asn.au> parents: 325 diff changeset	295
485 12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument. Matt Johnston <matt@ucc.asn.au> parents: 478 diff changeset	296 #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	297 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	298 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	299 } else
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument. Matt Johnston <matt@ucc.asn.au> parents: 478 diff changeset	300 #endif
560 52d7301e46bd Agent forwarding works Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	301 if (!cli_opts.no_cmd) {
325 0e4f225b7e07 Add -N "no remote command" dbclient option. Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	302 cli_send_chansess_request();
0e4f225b7e07 Add -N "no remote command" dbclient option. Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	303 }
754 2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	304
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	305 #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	306 setup_localtcp();
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	307 #endif
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	308 #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	309 setup_remotetcp();
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	310 #endif
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	311
325 0e4f225b7e07 Add -N "no remote command" dbclient option. Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	312 TRACE(("leave cli_sessionloop: running"))
37 0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	313 cli_ses.state = SESSION_RUNNING;
0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	314 return;
0913e2ee3545 we're nearly there yet Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	315
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	316 case SESSION_RUNNING:
325 0e4f225b7e07 Add -N "no remote command" dbclient option. Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	317 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	318 cli_finished();
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	319 }
41 18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	320
18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	321 if (cli_ses.winchange) {
18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	322 cli_chansess_winchange();
18eccbfb9641 added window-size change handling Matt Johnston <matt@ucc.asn.au> parents: 40 diff changeset	323 }
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	324 return;
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	325
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	326 /* XXX more here needed */
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
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	329 default:
f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	330 break;
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	331 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	332
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 727 diff changeset	333 TRACE2(("leave cli_sessionloop: fell out"))
26 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 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	336
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	337 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	338
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	339 if (!sessinitdone) {
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	340 return;
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	341 }
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	342
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	343 /* 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	344 * we don't revert the flags */
100 c72f5c10125d oops, the fcntl() was commented out Matt Johnston <matt@ucc.asn.au> parents: 99 diff changeset	345 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	346 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	347 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	348
40 b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	349 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	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
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	353 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	354
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	355 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	356 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	357 cli_opts.remotehost, cli_opts.remoteport);
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	358 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	359 }
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	360
b4874d772210 - Added terminal mode handling etc for the client, and window change Matt Johnston <matt@ucc.asn.au> parents: 39 diff changeset	361
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	362 /* called when the remote side closes the connection */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	363 static void cli_remoteclosed() {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	364
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	365 /* 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	366 * 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	367 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	368 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	369 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	370 ses.sock_out = -1;
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	371 dropbear_exit("Remote closed the connection");
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: diff changeset	372 }
43 942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	373
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	374 /* 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	375 * characters) text into clean text.
efbaf6b03837 added keyboard-interactive client support Matt Johnston <matt@ucc.asn.au> parents: 215 diff changeset	376 * Note: this is safe only with ascii - other charsets could have problems. */
1101 94ff5316980f Turn cleantext()'s dirtytext argument into char * Gaël PORTAY <gael.portay@gmail.com> parents: 1094 diff changeset	377 void cleantext(char* dirtytext) {
43 942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	378
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	379 unsigned int i, j;
1101 94ff5316980f Turn cleantext()'s dirtytext argument into char * Gaël PORTAY <gael.portay@gmail.com> parents: 1094 diff changeset	380 char c;
43 942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	381
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	382 j = 0;
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	383 for (i = 0; dirtytext[i] != '\0'; i++) {
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	384
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	385 c = dirtytext[i];
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	386 /* We can ignore '\r's */
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	387 if ( (c >= ' ' && c <= '~') \|\| c == '\n' \|\| c == '\t') {
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	388 dirtytext[j] = c;
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	389 j++;
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 }
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	392 /* Null terminate */
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	393 dirtytext[j] = '\0';
942b22d7dd1c Banner printing Matt Johnston <matt@ucc.asn.au> parents: 41 diff changeset	394 }
937 4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	395
4ad38e223ccd Send a failure response if a client receives a global request Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	396 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	397 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	398 /* 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	399 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	400 }

Mercurial > dropbear

annotate cli-session.c @ 1176:424822a6f8ee