annotate cli-session.c @ 1825:7a0068effc65

Add a comment about sending initial auth request
author Matt Johnston <matt@ucc.asn.au>
date Mon, 11 Oct 2021 15:12:22 +0800
parents 249681d9ecda
children c32976db772f
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1 /*
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2 * Dropbear SSH
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * Copyright (c) 2004 by Mihnea Stoenescu
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6 * All rights reserved.
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7 *
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8 * Permission is hereby granted, free of charge, to any person obtaining a copy
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9 * of this software and associated documentation files (the "Software"), to deal
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10 * in the Software without restriction, including without limitation the rights
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11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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12 * copies of the Software, and to permit persons to whom the Software is
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13 * furnished to do so, subject to the following conditions:
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14 *
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15 * The above copyright notice and this permission notice shall be included in
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16 * all copies or substantial portions of the Software.
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17 *
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18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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24 * SOFTWARE. */
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25
26
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26 #include "includes.h"
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27 #include "session.h"
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28 #include "dbutil.h"
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29 #include "kex.h"
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30 #include "ssh.h"
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31 #include "packet.h"
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32 #include "tcpfwd.h"
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33 #include "channel.h"
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34 #include "dbrandom.h"
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35 #include "service.h"
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36 #include "runopts.h"
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37 #include "chansession.h"
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38 #include "agentfwd.h"
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39 #include "crypto_desc.h"
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40 #include "netio.h"
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41
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42 static void cli_remoteclosed(void) ATTRIB_NORETURN;
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43 static void cli_sessionloop(void);
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44 static void cli_session_init(pid_t proxy_cmd_pid);
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45 static void cli_finished(void) ATTRIB_NORETURN;
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46 static void recv_msg_service_accept(void);
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47 static void cli_session_cleanup(void);
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48 static void recv_msg_global_request_cli(void);
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49
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50 struct clientsession cli_ses; /* GLOBAL */
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51
45
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52 /* Sorted in decreasing frequency will be more efficient - data and window
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53 * should be first */
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54 static const packettype cli_packettypes[] = {
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55 /* TYPE, FUNCTION */
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56 {SSH_MSG_CHANNEL_DATA, recv_msg_channel_data},
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57 {SSH_MSG_CHANNEL_EXTENDED_DATA, recv_msg_channel_extended_data},
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58 {SSH_MSG_CHANNEL_WINDOW_ADJUST, recv_msg_channel_window_adjust},
45
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59 {SSH_MSG_USERAUTH_FAILURE, recv_msg_userauth_failure}, /* client */
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60 {SSH_MSG_USERAUTH_SUCCESS, recv_msg_userauth_success}, /* client */
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61 {SSH_MSG_KEXINIT, recv_msg_kexinit},
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62 {SSH_MSG_KEXDH_REPLY, recv_msg_kexdh_reply}, /* client */
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63 {SSH_MSG_NEWKEYS, recv_msg_newkeys},
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64 {SSH_MSG_SERVICE_ACCEPT, recv_msg_service_accept}, /* client */
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65 {SSH_MSG_CHANNEL_REQUEST, recv_msg_channel_request},
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66 {SSH_MSG_CHANNEL_OPEN, recv_msg_channel_open},
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67 {SSH_MSG_CHANNEL_EOF, recv_msg_channel_eof},
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68 {SSH_MSG_CHANNEL_CLOSE, recv_msg_channel_close},
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69 {SSH_MSG_CHANNEL_OPEN_CONFIRMATION, recv_msg_channel_open_confirmation},
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70 {SSH_MSG_CHANNEL_OPEN_FAILURE, recv_msg_channel_open_failure},
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71 {SSH_MSG_USERAUTH_BANNER, recv_msg_userauth_banner}, /* client */
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72 {SSH_MSG_USERAUTH_SPECIFIC_60, recv_msg_userauth_specific_60}, /* client */
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73 {SSH_MSG_GLOBAL_REQUEST, recv_msg_global_request_cli},
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74 {SSH_MSG_CHANNEL_SUCCESS, ignore_recv_response},
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75 {SSH_MSG_CHANNEL_FAILURE, ignore_recv_response},
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76 #if DROPBEAR_CLI_REMOTETCPFWD
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77 {SSH_MSG_REQUEST_SUCCESS, cli_recv_msg_request_success}, /* client */
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78 {SSH_MSG_REQUEST_FAILURE, cli_recv_msg_request_failure}, /* client */
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79 #else
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80 /* For keepalive */
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81 {SSH_MSG_REQUEST_SUCCESS, ignore_recv_response},
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82 {SSH_MSG_REQUEST_FAILURE, ignore_recv_response},
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83 #endif
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84 {SSH_MSG_EXT_INFO, recv_msg_ext_info},
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85 {0, NULL} /* End */
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86 };
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87
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88 static const struct ChanType *cli_chantypes[] = {
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89 #if DROPBEAR_CLI_REMOTETCPFWD
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90 &cli_chan_tcpremote,
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91 #endif
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92 #if DROPBEAR_CLI_AGENTFWD
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93 &cli_chan_agent,
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94 #endif
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95 NULL /* Null termination */
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96 };
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97
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98 void cli_connected(int result, int sock, void* userdata, const char *errstring)
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99 {
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100 struct sshsession *myses = userdata;
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101 if (result == DROPBEAR_FAILURE) {
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102 dropbear_exit("Connect failed: %s", errstring);
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103 }
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104 myses->sock_in = myses->sock_out = sock;
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105 update_channel_prio();
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106 }
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107
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108 void cli_session(int sock_in, int sock_out, struct dropbear_progress_connection *progress, pid_t proxy_cmd_pid) {
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109
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110 common_session_init(sock_in, sock_out);
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111
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112 if (progress) {
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113 connect_set_writequeue(progress, &ses.writequeue);
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114 }
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115
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116 chaninitialise(cli_chantypes);
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117
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118 /* Set up cli_ses vars */
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119 cli_session_init(proxy_cmd_pid);
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120
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121 /* Ready to go */
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122 ses.init_done = 1;
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123
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124 /* Exchange identification */
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125 send_session_identification();
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126
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127 kexfirstinitialise(); /* initialise the kex state */
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128
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129 send_msg_kexinit();
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130
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131 session_loop(cli_sessionloop);
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132
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133 /* Not reached */
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134
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135 }
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136
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137 #if DROPBEAR_KEX_FIRST_FOLLOWS
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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
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parents: 686
diff changeset
142
1208
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
143 static void cli_session_init(pid_t proxy_cmd_pid) {
33
f789045062e6 Progressing client support
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parents: 26
diff changeset
144
f789045062e6 Progressing client support
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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 */
1208
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
162 cli_ses.proxy_cmd_pid = proxy_cmd_pid;
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
163 TRACE(("proxy command PID='%d'", proxy_cmd_pid));
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
164
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
165 /* Auth */
215
aad4b3f58556 rename PubkeyList to SignKeyList for clarity
Matt Johnston <matt@ucc.asn.au>
parents: 175
diff changeset
166 cli_ses.lastprivkey = NULL;
136
fb7147e2fb04 - Fixed a couple of compile warnings
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
167 cli_ses.lastauthtype = 0;
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
168
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
169 /* For printing "remote host closed" for the user */
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
170 ses.remoteclosed = cli_remoteclosed;
f789045062e6 Progressing client support
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parents: 26
diff changeset
171
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
172 ses.extra_session_cleanup = cli_session_cleanup;
33
f789045062e6 Progressing client support
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parents: 26
diff changeset
173
f789045062e6 Progressing client support
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parents: 26
diff changeset
174 /* packet handlers */
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
175 ses.packettypes = cli_packettypes;
35
0ad5fb979f42 set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
176
0ad5fb979f42 set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
177 ses.isserver = 0;
739
d44325108d0e first_kex_packet_follows working, needs tidying
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parents: 686
diff changeset
178
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1278
diff changeset
179 #if DROPBEAR_KEX_FIRST_FOLLOWS
739
d44325108d0e first_kex_packet_follows working, needs tidying
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parents: 686
diff changeset
180 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
181 #endif
739
d44325108d0e first_kex_packet_follows working, needs tidying
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parents: 686
diff changeset
182
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
183 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
184
1538
f20038b513a5 more linting (#58)
François Perrad <francois.perrad@gadz.org>
parents: 1495
diff changeset
185 static void send_msg_service_request(const char* servicename) {
727
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
186
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
187 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
188
00bc3df3a9c3 Don't bother waiting for a ssh-connection service reply - the server
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
189 CHECKCLEARTOWRITE();
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 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
192 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
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 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
195 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
196 }
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 static void recv_msg_service_accept(void) {
857
c19acba28590 use oldstyle comments
Matt Johnston <matt@ucc.asn.au>
parents: 801
diff changeset
199 /* 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
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
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
202 /* 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
203 * service, userauth and channel requests */
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
204 static void cli_sessionloop() {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
205
731
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
Matt Johnston <matt@ucc.asn.au>
parents: 727
diff changeset
206 TRACE2(("enter cli_sessionloop"))
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
207
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
208 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
209 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
210 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
211 }
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
34
e2a1eaa19f22 Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
213 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
214 /* 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
215 * negotiation would have failed. */
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
216 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
217 send_msg_kexdh_init();
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
218 }
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 686
diff changeset
219 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
220 TRACE(("leave cli_sessionloop: done with KEXINIT_RCVD"))
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
221 return;
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
222 }
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
223
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
224 /* 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
225 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
226 cli_ses.kex_state = KEX_NOTHING;
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 /* 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
230 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
231 TRACE(("leave cli_sessionloop: kex_state != KEX_NOTHING"))
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
232 return;
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
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
235 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
236 /* 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
237 * 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
238 TRACE2(("donefirstkex false\n"))
34
e2a1eaa19f22 Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
239 return;
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
240 }
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
241
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
242 switch (cli_ses.state) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
243
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
244 case STATE_NOTHING:
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
245 /* 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
246 * userauth */
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
247 send_msg_service_request(SSH_SERVICE_USERAUTH);
1825
7a0068effc65 Add a comment about sending initial auth request
Matt Johnston <matt@ucc.asn.au>
parents: 1789
diff changeset
248 /* We aren't using any "implicit server authentication" methods,
7a0068effc65 Add a comment about sending initial auth request
Matt Johnston <matt@ucc.asn.au>
parents: 1789
diff changeset
249 so don't need to wait for a response for SSH_SERVICE_USERAUTH
7a0068effc65 Add a comment about sending initial auth request
Matt Johnston <matt@ucc.asn.au>
parents: 1789
diff changeset
250 before sending the auth messages (rfc4253 10) */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
251 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
252 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
253 TRACE(("leave cli_sessionloop: sent userauth methods req"))
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
254 return;
883
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
255
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
256 case USERAUTH_REQ_SENT:
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
257 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
258 return;
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
259
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
260 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
261 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
262 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
263 }
45
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with
Matt Johnston <matt@ucc.asn.au>
parents: 43
diff changeset
264 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
265 TRACE(("leave cli_sessionloop: cli_auth_try"))
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
266 return;
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
267
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
268 case USERAUTH_SUCCESS_RCVD:
1212
bf626d259eb1 Support syslog logging in dbclient.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1208
diff changeset
269 #ifndef DISABLE_SYSLOG
bf626d259eb1 Support syslog logging in dbclient.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1208
diff changeset
270 if (opts.usingsyslog) {
bf626d259eb1 Support syslog logging in dbclient.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1208
diff changeset
271 dropbear_log(LOG_INFO, "Authentication succeeded.");
bf626d259eb1 Support syslog logging in dbclient.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1208
diff changeset
272 }
bf626d259eb1 Support syslog logging in dbclient.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1208
diff changeset
273 #endif
326
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
274
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
275 if (cli_opts.backgrounded) {
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
276 int devnull;
433
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 326
diff changeset
277 /* 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
278 is confusing, though stdout/stderr could be useful. */
1387
e7f11ed5fe28 Use DROPBEAR_PATH_DEVNULL instead of undefined _PATH_DEVNULL
Ben Gardner <bgardner@wabtec.com>
parents: 1295
diff changeset
279 devnull = open(DROPBEAR_PATH_DEVNULL, O_RDONLY);
326
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
280 if (devnull < 0) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 568
diff changeset
281 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
282 errno, strerror(errno));
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
283 }
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
284 dup2(devnull, STDIN_FILENO);
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
285 if (daemon(0, 1) < 0) {
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
286 dropbear_exit("Backgrounding failed: %d %s",
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 }
d965110e3f5c add -f background option to dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 325
diff changeset
290
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1278
diff changeset
291 #if DROPBEAR_CLI_NETCAT
485
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
292 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
293 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
294 } else
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
295 #endif
560
52d7301e46bd Agent forwarding works
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
296 if (!cli_opts.no_cmd) {
325
0e4f225b7e07 Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents: 272
diff changeset
297 cli_send_chansess_request();
0e4f225b7e07 Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents: 272
diff changeset
298 }
754
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
299
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1278
diff changeset
300 #if DROPBEAR_CLI_LOCALTCPFWD
754
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
301 setup_localtcp();
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
302 #endif
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1278
diff changeset
303 #if DROPBEAR_CLI_REMOTETCPFWD
754
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
304 setup_remotetcp();
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
305 #endif
2400b8685762 setup tcp after requesting a channel - might hide some DNS latency
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
306
325
0e4f225b7e07 Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents: 272
diff changeset
307 TRACE(("leave cli_sessionloop: running"))
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
308 cli_ses.state = SESSION_RUNNING;
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
309 return;
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
310
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
311 case SESSION_RUNNING:
325
0e4f225b7e07 Add -N "no remote command" dbclient option.
Matt Johnston <matt@ucc.asn.au>
parents: 272
diff changeset
312 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
313 cli_finished();
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
314 }
41
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
315
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
316 if (cli_ses.winchange) {
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
317 cli_chansess_winchange();
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
318 }
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
319 return;
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
320
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
321 /* XXX more here needed */
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
322
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
323
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
324 default:
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
325 break;
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
326 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
327
731
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
Matt Johnston <matt@ucc.asn.au>
parents: 727
diff changeset
328 TRACE2(("leave cli_sessionloop: fell out"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
329
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
1208
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
332 void kill_proxy_command(void) {
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
333 /*
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
334 * Send SIGHUP to proxy command if used. We don't wait() in
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
335 * case it hangs and instead rely on init to reap the child
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
336 */
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
337 if (cli_ses.proxy_cmd_pid > 1) {
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
338 TRACE(("killing proxy command with PID='%d'", cli_ses.proxy_cmd_pid));
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
339 kill(cli_ses.proxy_cmd_pid, SIGHUP);
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
340 }
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
341 }
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
342
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
343 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
344
1495
0c16b4ccbd54 make signal flags volatile, simplify handling
Matt Johnston <matt@ucc.asn.au>
parents: 1479
diff changeset
345 if (!ses.init_done) {
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
346 return;
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
347 }
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
1208
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
349 kill_proxy_command();
fb58cf341951 Client: kill proxy command when exiting application.
Konstantin Tokarev <ktokarev@smartlabs.tv>
parents: 1124
diff changeset
350
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
351 /* 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
352 * we don't revert the flags */
1258
854f39ff5105 ignore return value from fcntl()
Matt Johnston <matt@ucc.asn.au>
parents: 1212
diff changeset
353 /* Ignore return value since there's nothing we can do */
854f39ff5105 ignore return value from fcntl()
Matt Johnston <matt@ucc.asn.au>
parents: 1212
diff changeset
354 (void)fcntl(cli_ses.stdincopy, F_SETFL, cli_ses.stdinflags);
854f39ff5105 ignore return value from fcntl()
Matt Johnston <matt@ucc.asn.au>
parents: 1212
diff changeset
355 (void)fcntl(cli_ses.stdoutcopy, F_SETFL, cli_ses.stdoutflags);
854f39ff5105 ignore return value from fcntl()
Matt Johnston <matt@ucc.asn.au>
parents: 1212
diff changeset
356 (void)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
357
1742
6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer
Matt Johnston <matt@ucc.asn.au>
parents: 1741
diff changeset
358 /* Don't leak */
6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer
Matt Johnston <matt@ucc.asn.au>
parents: 1741
diff changeset
359 m_close(cli_ses.stdincopy);
6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer
Matt Johnston <matt@ucc.asn.au>
parents: 1741
diff changeset
360 m_close(cli_ses.stdoutcopy);
6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer
Matt Johnston <matt@ucc.asn.au>
parents: 1741
diff changeset
361 m_close(cli_ses.stderrcopy);
6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer
Matt Johnston <matt@ucc.asn.au>
parents: 1741
diff changeset
362
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
363 cli_tty_cleanup();
1676
d5cdc60db08e ext-info handling for server-sig-algs
Matt Johnston <matt@ucc.asn.au>
parents: 1625
diff changeset
364 if (cli_ses.server_sig_algs) {
d5cdc60db08e ext-info handling for server-sig-algs
Matt Johnston <matt@ucc.asn.au>
parents: 1625
diff changeset
365 buf_free(cli_ses.server_sig_algs);
d5cdc60db08e ext-info handling for server-sig-algs
Matt Johnston <matt@ucc.asn.au>
parents: 1625
diff changeset
366 }
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
367 }
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
368
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
369 static void cli_finished() {
1686
83d48276885b fix typo
Matt Johnston <matt@ucc.asn.au>
parents: 1676
diff changeset
370 TRACE(("cli_finished()"))
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
371
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
372 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
373 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
374 cli_opts.remotehost, cli_opts.remoteport);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
375 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
376 }
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
377
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
378
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
379 /* called when the remote side closes the connection */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
380 static void cli_remoteclosed() {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
381
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382 /* 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
383 * 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
384 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
385 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
386 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
387 ses.sock_out = -1;
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 568
diff changeset
388 dropbear_exit("Remote closed the connection");
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
389 }
43
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 /* 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
392 * characters) text into clean text.
efbaf6b03837 added keyboard-interactive client support
Matt Johnston <matt@ucc.asn.au>
parents: 215
diff changeset
393 * 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
394 void cleantext(char* dirtytext) {
43
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
395
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
396 unsigned int i, j;
1101
94ff5316980f Turn cleantext()'s dirtytext argument into char *
Gaël PORTAY <gael.portay@gmail.com>
parents: 1094
diff changeset
397 char c;
43
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
398
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
399 j = 0;
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
400 for (i = 0; dirtytext[i] != '\0'; i++) {
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
401
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
402 c = dirtytext[i];
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
403 /* We can ignore '\r's */
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
404 if ( (c >= ' ' && c <= '~') || c == '\n' || c == '\t') {
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
405 dirtytext[j] = c;
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
406 j++;
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
407 }
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
408 }
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
409 /* Null terminate */
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
410 dirtytext[j] = '\0';
942b22d7dd1c Banner printing
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
411 }
937
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
412
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
413 static void recv_msg_global_request_cli(void) {
1788
1fc0012b9c38 Fix handling of replies to global requests (#112)
Dirkjan Bussink <d.bussink@gmail.com>
parents: 1742
diff changeset
414 unsigned int wantreply = 0;
1fc0012b9c38 Fix handling of replies to global requests (#112)
Dirkjan Bussink <d.bussink@gmail.com>
parents: 1742
diff changeset
415
1789
249681d9ecda Use buf_eatstring instead
Matt Johnston <matt@ucc.asn.au>
parents: 1788
diff changeset
416 buf_eatstring(ses.payload);
1788
1fc0012b9c38 Fix handling of replies to global requests (#112)
Dirkjan Bussink <d.bussink@gmail.com>
parents: 1742
diff changeset
417 wantreply = buf_getbool(ses.payload);
1fc0012b9c38 Fix handling of replies to global requests (#112)
Dirkjan Bussink <d.bussink@gmail.com>
parents: 1742
diff changeset
418
1fc0012b9c38 Fix handling of replies to global requests (#112)
Dirkjan Bussink <d.bussink@gmail.com>
parents: 1742
diff changeset
419 TRACE(("recv_msg_global_request_cli: want_reply: %u", wantreply));
1fc0012b9c38 Fix handling of replies to global requests (#112)
Dirkjan Bussink <d.bussink@gmail.com>
parents: 1742
diff changeset
420
1fc0012b9c38 Fix handling of replies to global requests (#112)
Dirkjan Bussink <d.bussink@gmail.com>
parents: 1742
diff changeset
421 if (wantreply) {
1fc0012b9c38 Fix handling of replies to global requests (#112)
Dirkjan Bussink <d.bussink@gmail.com>
parents: 1742
diff changeset
422 /* Send a proper rejection */
1fc0012b9c38 Fix handling of replies to global requests (#112)
Dirkjan Bussink <d.bussink@gmail.com>
parents: 1742
diff changeset
423 send_msg_request_failure();
1fc0012b9c38 Fix handling of replies to global requests (#112)
Dirkjan Bussink <d.bussink@gmail.com>
parents: 1742
diff changeset
424 }
937
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
425 }
1741
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
426
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
427 void cli_dropbear_exit(int exitcode, const char* format, va_list param) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
428 char exitmsg[150];
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
429 char fullmsg[300];
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
430
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
431 /* Note that exit message must be rendered before session cleanup */
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
432
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
433 /* Render the formatted exit message */
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
434 vsnprintf(exitmsg, sizeof(exitmsg), format, param);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
435 TRACE(("Exited, cleaning up: %s", exitmsg))
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
436
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
437 /* Add the prefix depending on session/auth state */
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
438 if (!ses.init_done) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
439 snprintf(fullmsg, sizeof(fullmsg), "Exited: %s", exitmsg);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
440 } else {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
441 snprintf(fullmsg, sizeof(fullmsg),
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
442 "Connection to %s@%s:%s exited: %s",
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
443 cli_opts.username, cli_opts.remotehost,
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
444 cli_opts.remoteport, exitmsg);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
445 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
446
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
447 /* Do the cleanup first, since then the terminal will be reset */
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
448 session_cleanup();
1742
6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer
Matt Johnston <matt@ucc.asn.au>
parents: 1741
diff changeset
449
1741
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
450 #if DROPBEAR_FUZZ
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
451 if (fuzz.do_jmp) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
452 longjmp(fuzz.jmp, 1);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
453 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
454 #endif
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
455
1742
6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer
Matt Johnston <matt@ucc.asn.au>
parents: 1741
diff changeset
456 /* Avoid printing onwards from terminal cruft */
6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer
Matt Johnston <matt@ucc.asn.au>
parents: 1741
diff changeset
457 fprintf(stderr, "\n");
6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer
Matt Johnston <matt@ucc.asn.au>
parents: 1741
diff changeset
458
6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer
Matt Johnston <matt@ucc.asn.au>
parents: 1741
diff changeset
459 dropbear_log(LOG_INFO, "%s", fullmsg);
6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer
Matt Johnston <matt@ucc.asn.au>
parents: 1741
diff changeset
460
1741
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
461 exit(exitcode);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
462 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
463
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
464 void cli_dropbear_log(int priority, const char* format, va_list param) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
465
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
466 char printbuf[1024];
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
467 const char *name;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
468
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
469 name = cli_opts.progname;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
470 if (!name) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
471 name = "dbclient";
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
472 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
473
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
474 vsnprintf(printbuf, sizeof(printbuf), format, param);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
475
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
476 #ifndef DISABLE_SYSLOG
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
477 if (opts.usingsyslog) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
478 syslog(priority, "%s", printbuf);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
479 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
480 #endif
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
481
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
482 fprintf(stderr, "%s: %s\n", name, printbuf);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
483 fflush(stderr);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
484 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away)
Matt Johnston <matt@ucc.asn.au>
parents: 1686
diff changeset
485