Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 4 | * All rights reserved |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 5 | * Ssh client program. This program can be used to log into a remote machine. |
| 6 | * The software supports strong authentication, encryption, and forwarding |
| 7 | * of X11, TCP/IP, and authentication connections. |
| 8 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 9 | * As far as I am concerned, the code I have written for this software |
| 10 | * can be used freely for any purpose. Any derived versions of this |
| 11 | * software must be clearly marked as such, and if the derived work is |
| 12 | * incompatible with the protocol description in the RFC file, it must be |
| 13 | * called by a name other than "ssh" or "Secure Shell". |
| 14 | * |
| 15 | * Copyright (c) 1999 Niels Provos. All rights reserved. |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 16 | * Copyright (c) 2000, 2001, 2002, 2003 Markus Friedl. All rights reserved. |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 17 | * |
| 18 | * Modified to work with SSL by Niels Provos <provos@citi.umich.edu> |
| 19 | * in Canada (German citizen). |
| 20 | * |
| 21 | * Redistribution and use in source and binary forms, with or without |
| 22 | * modification, are permitted provided that the following conditions |
| 23 | * are met: |
| 24 | * 1. Redistributions of source code must retain the above copyright |
| 25 | * notice, this list of conditions and the following disclaimer. |
| 26 | * 2. Redistributions in binary form must reproduce the above copyright |
| 27 | * notice, this list of conditions and the following disclaimer in the |
| 28 | * documentation and/or other materials provided with the distribution. |
| 29 | * |
| 30 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 31 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 32 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 33 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 34 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 35 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 36 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 37 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 38 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 39 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 40 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 41 | |
| 42 | #include "includes.h" |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame^] | 43 | RCSID("$OpenBSD: ssh.c,v 1.241 2005/06/06 11:20:36 djm Exp $"); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 44 | |
| 45 | #include <openssl/evp.h> |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 46 | #include <openssl/err.h> |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 47 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 48 | #include "ssh.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 49 | #include "ssh1.h" |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 50 | #include "ssh2.h" |
| 51 | #include "compat.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 52 | #include "cipher.h" |
| 53 | #include "xmalloc.h" |
| 54 | #include "packet.h" |
| 55 | #include "buffer.h" |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 56 | #include "bufaux.h" |
Ben Lindstrom | c763767 | 2001-06-09 00:36:26 +0000 | [diff] [blame] | 57 | #include "channels.h" |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 58 | #include "key.h" |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 59 | #include "authfd.h" |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 60 | #include "authfile.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 61 | #include "pathnames.h" |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 62 | #include "dispatch.h" |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 63 | #include "clientloop.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 64 | #include "log.h" |
| 65 | #include "readconf.h" |
| 66 | #include "sshconnect.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 67 | #include "misc.h" |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 68 | #include "kex.h" |
| 69 | #include "mac.h" |
Darren Tucker | 06f2bd8 | 2004-05-13 16:06:46 +1000 | [diff] [blame] | 70 | #include "sshpty.h" |
Darren Tucker | 46bc075 | 2004-05-02 22:11:30 +1000 | [diff] [blame] | 71 | #include "match.h" |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 72 | #include "msg.h" |
| 73 | #include "monitor_fdpass.h" |
Darren Tucker | 25f60a7 | 2004-08-15 17:23:34 +1000 | [diff] [blame] | 74 | #include "uidswap.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 75 | |
Ben Lindstrom | c5b6800 | 2001-07-04 04:52:03 +0000 | [diff] [blame] | 76 | #ifdef SMARTCARD |
Ben Lindstrom | c5b6800 | 2001-07-04 04:52:03 +0000 | [diff] [blame] | 77 | #include "scard.h" |
Ben Lindstrom | bcc1808 | 2001-08-06 21:59:25 +0000 | [diff] [blame] | 78 | #endif |
Ben Lindstrom | c5b6800 | 2001-07-04 04:52:03 +0000 | [diff] [blame] | 79 | |
Damien Miller | 3f90587 | 1999-11-15 17:10:57 +1100 | [diff] [blame] | 80 | extern char *__progname; |
Damien Miller | 3f90587 | 1999-11-15 17:10:57 +1100 | [diff] [blame] | 81 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 82 | /* Flag indicating whether debug mode is on. This can be set on the command line. */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 83 | int debug_flag = 0; |
| 84 | |
Damien Miller | 7892879 | 2000-04-12 20:17:38 +1000 | [diff] [blame] | 85 | /* Flag indicating whether a tty should be allocated */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 86 | int tty_flag = 0; |
Ben Lindstrom | 4dccfa5 | 2000-12-28 16:40:05 +0000 | [diff] [blame] | 87 | int no_tty_flag = 0; |
| 88 | int force_tty_flag = 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 89 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 90 | /* don't exec a shell */ |
| 91 | int no_shell_flag = 0; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 92 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 93 | /* |
| 94 | * Flag indicating that nothing should be read from stdin. This can be set |
| 95 | * on the command line. |
| 96 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 97 | int stdin_null_flag = 0; |
| 98 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 99 | /* |
| 100 | * Flag indicating that ssh should fork after authentication. This is useful |
Ben Lindstrom | f666fec | 2002-06-06 19:51:58 +0000 | [diff] [blame] | 101 | * so that the passphrase can be entered manually, and then ssh goes to the |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 102 | * background. |
| 103 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 104 | int fork_after_authentication_flag = 0; |
| 105 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 106 | /* |
| 107 | * General data structure for command line options and options configurable |
| 108 | * in configuration files. See readconf.h. |
| 109 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 110 | Options options; |
| 111 | |
Ben Lindstrom | 14f31ab | 2001-09-12 17:48:04 +0000 | [diff] [blame] | 112 | /* optional user configfile */ |
| 113 | char *config = NULL; |
| 114 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 115 | /* |
| 116 | * Name of the host we are connecting to. This is the name given on the |
| 117 | * command line, or the HostName specified for the user-supplied name in a |
| 118 | * configuration file. |
| 119 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 120 | char *host; |
| 121 | |
| 122 | /* socket address the host resolves to */ |
Damien Miller | 34132e5 | 2000-01-14 15:45:46 +1100 | [diff] [blame] | 123 | struct sockaddr_storage hostaddr; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 124 | |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 125 | /* Private host keys. */ |
Ben Lindstrom | 1bad256 | 2002-06-06 19:57:33 +0000 | [diff] [blame] | 126 | Sensitive sensitive_data; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 127 | |
| 128 | /* Original real UID. */ |
| 129 | uid_t original_real_uid; |
Ben Lindstrom | f9c4884 | 2002-06-11 16:37:51 +0000 | [diff] [blame] | 130 | uid_t original_effective_uid; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 131 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 132 | /* command to be executed */ |
| 133 | Buffer command; |
| 134 | |
Damien Miller | 832562e | 2001-01-30 09:30:01 +1100 | [diff] [blame] | 135 | /* Should we execute a command or invoke a subsystem? */ |
| 136 | int subsystem_flag = 0; |
| 137 | |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 138 | /* # of replies received for global requests */ |
| 139 | static int client_global_request_id = 0; |
| 140 | |
Damien Miller | 8c4e18a | 2002-09-19 12:05:02 +1000 | [diff] [blame] | 141 | /* pid of proxycommand child process */ |
| 142 | pid_t proxy_command_pid = 0; |
| 143 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 144 | /* fd to control socket */ |
| 145 | int control_fd = -1; |
| 146 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 147 | /* Multiplexing control command */ |
Darren Tucker | 0814d31 | 2005-06-01 23:08:51 +1000 | [diff] [blame] | 148 | static u_int mux_command = 0; |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 149 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 150 | /* Only used in control client mode */ |
| 151 | volatile sig_atomic_t control_client_terminate = 0; |
| 152 | u_int control_server_pid = 0; |
| 153 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 154 | /* Prints a help message to the user. This function never returns. */ |
| 155 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 156 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 157 | usage(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 158 | { |
Damien Miller | 5095510 | 2004-03-22 09:34:58 +1100 | [diff] [blame] | 159 | fprintf(stderr, |
Darren Tucker | 9c6bf32 | 2004-12-03 14:10:19 +1100 | [diff] [blame] | 160 | "usage: ssh [-1246AaCfgkMNnqsTtVvXxY] [-b bind_address] [-c cipher_spec]\n" |
Damien Miller | 02faece | 2005-03-02 12:04:32 +1100 | [diff] [blame] | 161 | " [-D port] [-e escape_char] [-F configfile]\n" |
| 162 | " [-i identity_file] [-L [bind_address:]port:host:hostport]\n" |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 163 | " [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]\n" |
Damien Miller | 02faece | 2005-03-02 12:04:32 +1100 | [diff] [blame] | 164 | " [-R [bind_address:]port:host:hostport] [-S ctl_path]\n" |
Darren Tucker | 9c6bf32 | 2004-12-03 14:10:19 +1100 | [diff] [blame] | 165 | " [user@]hostname [command]\n" |
Damien Miller | 5095510 | 2004-03-22 09:34:58 +1100 | [diff] [blame] | 166 | ); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 167 | exit(1); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 168 | } |
| 169 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 170 | static int ssh_session(void); |
| 171 | static int ssh_session2(void); |
| 172 | static void load_public_identity_files(void); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 173 | static void control_client(const char *path); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 174 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 175 | /* |
| 176 | * Main program for the ssh client. |
| 177 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 178 | int |
| 179 | main(int ac, char **av) |
| 180 | { |
Ben Lindstrom | 2415757 | 2002-06-12 16:09:39 +0000 | [diff] [blame] | 181 | int i, opt, exit_status; |
Damien Miller | 9836cf8 | 2003-12-17 16:30:06 +1100 | [diff] [blame] | 182 | char *p, *cp, *line, buf[256]; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 183 | struct stat st; |
Ben Lindstrom | 086cf21 | 2001-03-05 05:56:40 +0000 | [diff] [blame] | 184 | struct passwd *pw; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 185 | int dummy; |
Ben Lindstrom | 5ccf63a | 2001-09-24 20:00:10 +0000 | [diff] [blame] | 186 | extern int optind, optreset; |
Damien Miller | 4f8e669 | 2001-07-14 13:22:53 +1000 | [diff] [blame] | 187 | extern char *optarg; |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 188 | Forward fwd; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 189 | |
Damien Miller | 59d3d5b | 2003-08-22 09:34:41 +1000 | [diff] [blame] | 190 | __progname = ssh_get_progname(av[0]); |
Damien Miller | f9b625c | 2000-07-09 22:42:32 +1000 | [diff] [blame] | 191 | init_rng(); |
| 192 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 193 | /* |
| 194 | * Save the original real uid. It will be needed later (uid-swapping |
| 195 | * may clobber the real uid). |
| 196 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 197 | original_real_uid = getuid(); |
| 198 | original_effective_uid = geteuid(); |
Damien Miller | a8e06ce | 2003-11-21 23:48:55 +1100 | [diff] [blame] | 199 | |
Damien Miller | 50b9a60 | 2002-09-04 16:50:06 +1000 | [diff] [blame] | 200 | /* |
| 201 | * Use uid-swapping to give up root privileges for the duration of |
| 202 | * option processing. We will re-instantiate the rights when we are |
| 203 | * ready to create the privileged port, and will permanently drop |
| 204 | * them when the port has been created (actually, when the connection |
| 205 | * has been made, as we may need to create the port several times). |
| 206 | */ |
| 207 | PRIV_END; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 208 | |
Damien Miller | 05dd795 | 2000-10-01 00:42:48 +1100 | [diff] [blame] | 209 | #ifdef HAVE_SETRLIMIT |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 210 | /* If we are installed setuid root be careful to not drop core. */ |
| 211 | if (original_real_uid != original_effective_uid) { |
| 212 | struct rlimit rlim; |
| 213 | rlim.rlim_cur = rlim.rlim_max = 0; |
| 214 | if (setrlimit(RLIMIT_CORE, &rlim) < 0) |
| 215 | fatal("setrlimit failed: %.100s", strerror(errno)); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 216 | } |
Damien Miller | bac2d8a | 2000-09-05 16:13:06 +1100 | [diff] [blame] | 217 | #endif |
Ben Lindstrom | 3fcf1a2 | 2001-04-08 18:26:59 +0000 | [diff] [blame] | 218 | /* Get user data. */ |
| 219 | pw = getpwuid(original_real_uid); |
| 220 | if (!pw) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 221 | logit("You don't exist, go away!"); |
Ben Lindstrom | 3fcf1a2 | 2001-04-08 18:26:59 +0000 | [diff] [blame] | 222 | exit(1); |
| 223 | } |
| 224 | /* Take a copy of the returned structure. */ |
| 225 | pw = pwcopy(pw); |
| 226 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 227 | /* |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 228 | * Set our umask to something reasonable, as some files are created |
| 229 | * with the default umask. This will make them world-readable but |
| 230 | * writable only by the owner, which is ok for all files for which we |
| 231 | * don't set the modes explicitly. |
| 232 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 233 | umask(022); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 234 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 235 | /* Initialize option structure to indicate that no values have been set. */ |
| 236 | initialize_options(&options); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 237 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 238 | /* Parse command-line arguments. */ |
| 239 | host = NULL; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 240 | |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 241 | again: |
| 242 | while ((opt = getopt(ac, av, |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 243 | "1246ab:c:e:fgi:kl:m:no:p:qstvxACD:F:I:L:MNO:PR:S:TVXY")) != -1) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 244 | switch (opt) { |
Ben Lindstrom | 1e7d306 | 2001-02-09 02:36:43 +0000 | [diff] [blame] | 245 | case '1': |
| 246 | options.protocol = SSH_PROTO_1; |
| 247 | break; |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 248 | case '2': |
| 249 | options.protocol = SSH_PROTO_2; |
| 250 | break; |
Damien Miller | 34132e5 | 2000-01-14 15:45:46 +1100 | [diff] [blame] | 251 | case '4': |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 252 | options.address_family = AF_INET; |
Damien Miller | 34132e5 | 2000-01-14 15:45:46 +1100 | [diff] [blame] | 253 | break; |
Damien Miller | 34132e5 | 2000-01-14 15:45:46 +1100 | [diff] [blame] | 254 | case '6': |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 255 | options.address_family = AF_INET6; |
Damien Miller | 34132e5 | 2000-01-14 15:45:46 +1100 | [diff] [blame] | 256 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 257 | case 'n': |
| 258 | stdin_null_flag = 1; |
| 259 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 260 | case 'f': |
| 261 | fork_after_authentication_flag = 1; |
| 262 | stdin_null_flag = 1; |
| 263 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 264 | case 'x': |
| 265 | options.forward_x11 = 0; |
| 266 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 267 | case 'X': |
| 268 | options.forward_x11 = 1; |
| 269 | break; |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 270 | case 'Y': |
| 271 | options.forward_x11 = 1; |
| 272 | options.forward_x11_trusted = 1; |
| 273 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 274 | case 'g': |
| 275 | options.gateway_ports = 1; |
| 276 | break; |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 277 | case 'O': |
| 278 | if (strcmp(optarg, "check") == 0) |
| 279 | mux_command = SSHMUX_COMMAND_ALIVE_CHECK; |
| 280 | else if (strcmp(optarg, "exit") == 0) |
| 281 | mux_command = SSHMUX_COMMAND_TERMINATE; |
| 282 | else |
| 283 | fatal("Invalid multiplex command."); |
| 284 | break; |
Damien Miller | 147bba3 | 2002-09-04 16:46:06 +1000 | [diff] [blame] | 285 | case 'P': /* deprecated */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 286 | options.use_privileged_port = 0; |
| 287 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 288 | case 'a': |
| 289 | options.forward_agent = 0; |
| 290 | break; |
Damien Miller | b1715dc | 2000-05-30 13:44:51 +1000 | [diff] [blame] | 291 | case 'A': |
| 292 | options.forward_agent = 1; |
| 293 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 294 | case 'k': |
Damien Miller | e0113cc | 2003-11-24 13:10:09 +1100 | [diff] [blame] | 295 | options.gss_deleg_creds = 0; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 296 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 297 | case 'i': |
| 298 | if (stat(optarg, &st) < 0) { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 299 | fprintf(stderr, "Warning: Identity file %s " |
Damien Miller | 3eb48b6 | 2005-03-01 21:15:46 +1100 | [diff] [blame] | 300 | "not accessible: %s.\n", optarg, |
| 301 | strerror(errno)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 302 | break; |
| 303 | } |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 304 | if (options.num_identity_files >= |
| 305 | SSH_MAX_IDENTITY_FILES) |
| 306 | fatal("Too many identity files specified " |
| 307 | "(max %d)", SSH_MAX_IDENTITY_FILES); |
| 308 | options.identity_files[options.num_identity_files++] = |
| 309 | xstrdup(optarg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 310 | break; |
Ben Lindstrom | c5b6800 | 2001-07-04 04:52:03 +0000 | [diff] [blame] | 311 | case 'I': |
| 312 | #ifdef SMARTCARD |
Ben Lindstrom | f7db3bb | 2001-08-06 21:35:51 +0000 | [diff] [blame] | 313 | options.smartcard_device = xstrdup(optarg); |
Ben Lindstrom | bcc1808 | 2001-08-06 21:59:25 +0000 | [diff] [blame] | 314 | #else |
Ben Lindstrom | c5b6800 | 2001-07-04 04:52:03 +0000 | [diff] [blame] | 315 | fprintf(stderr, "no support for smartcards.\n"); |
Ben Lindstrom | bcc1808 | 2001-08-06 21:59:25 +0000 | [diff] [blame] | 316 | #endif |
Ben Lindstrom | c5b6800 | 2001-07-04 04:52:03 +0000 | [diff] [blame] | 317 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 318 | case 't': |
Ben Lindstrom | 4dccfa5 | 2000-12-28 16:40:05 +0000 | [diff] [blame] | 319 | if (tty_flag) |
| 320 | force_tty_flag = 1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 321 | tty_flag = 1; |
| 322 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 323 | case 'v': |
Darren Tucker | e98dfa3 | 2003-07-19 19:54:31 +1000 | [diff] [blame] | 324 | if (debug_flag == 0) { |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 325 | debug_flag = 1; |
| 326 | options.log_level = SYSLOG_LEVEL_DEBUG1; |
Darren Tucker | e98dfa3 | 2003-07-19 19:54:31 +1000 | [diff] [blame] | 327 | } else { |
| 328 | if (options.log_level < SYSLOG_LEVEL_DEBUG3) |
| 329 | options.log_level++; |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 330 | break; |
Darren Tucker | e98dfa3 | 2003-07-19 19:54:31 +1000 | [diff] [blame] | 331 | } |
Darren Tucker | e9bf984 | 2004-11-05 20:05:32 +1100 | [diff] [blame] | 332 | /* FALLTHROUGH */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 333 | case 'V': |
Damien Miller | 0c889cd | 2004-03-22 09:36:00 +1100 | [diff] [blame] | 334 | fprintf(stderr, "%s, %s\n", |
Damien Miller | 2aa6d3c | 2004-09-12 16:53:04 +1000 | [diff] [blame] | 335 | SSH_RELEASE, SSLeay_version(SSLEAY_VERSION)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 336 | if (opt == 'V') |
| 337 | exit(0); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 338 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 339 | case 'q': |
| 340 | options.log_level = SYSLOG_LEVEL_QUIET; |
| 341 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 342 | case 'e': |
| 343 | if (optarg[0] == '^' && optarg[2] == 0 && |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 344 | (u_char) optarg[1] >= 64 && |
| 345 | (u_char) optarg[1] < 128) |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 346 | options.escape_char = (u_char) optarg[1] & 31; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 347 | else if (strlen(optarg) == 1) |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 348 | options.escape_char = (u_char) optarg[0]; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 349 | else if (strcmp(optarg, "none") == 0) |
Ben Lindstrom | 2b1f71b | 2001-06-05 20:32:21 +0000 | [diff] [blame] | 350 | options.escape_char = SSH_ESCAPECHAR_NONE; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 351 | else { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 352 | fprintf(stderr, "Bad escape character '%s'.\n", |
| 353 | optarg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 354 | exit(1); |
| 355 | } |
| 356 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 357 | case 'c': |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 358 | if (ciphers_valid(optarg)) { |
| 359 | /* SSH2 only */ |
| 360 | options.ciphers = xstrdup(optarg); |
Darren Tucker | 5cb30ad | 2004-08-12 22:40:24 +1000 | [diff] [blame] | 361 | options.cipher = SSH_CIPHER_INVALID; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 362 | } else { |
| 363 | /* SSH1 only */ |
Damien Miller | e39cacc | 2000-11-29 12:18:44 +1100 | [diff] [blame] | 364 | options.cipher = cipher_number(optarg); |
| 365 | if (options.cipher == -1) { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 366 | fprintf(stderr, |
| 367 | "Unknown cipher type '%s'\n", |
| 368 | optarg); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 369 | exit(1); |
| 370 | } |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 371 | if (options.cipher == SSH_CIPHER_3DES) |
Damien Miller | e39cacc | 2000-11-29 12:18:44 +1100 | [diff] [blame] | 372 | options.ciphers = "3des-cbc"; |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 373 | else if (options.cipher == SSH_CIPHER_BLOWFISH) |
Damien Miller | e39cacc | 2000-11-29 12:18:44 +1100 | [diff] [blame] | 374 | options.ciphers = "blowfish-cbc"; |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 375 | else |
Damien Miller | e39cacc | 2000-11-29 12:18:44 +1100 | [diff] [blame] | 376 | options.ciphers = (char *)-1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 377 | } |
| 378 | break; |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 379 | case 'm': |
| 380 | if (mac_valid(optarg)) |
| 381 | options.macs = xstrdup(optarg); |
| 382 | else { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 383 | fprintf(stderr, "Unknown mac type '%s'\n", |
| 384 | optarg); |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 385 | exit(1); |
| 386 | } |
| 387 | break; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 388 | case 'M': |
Damien Miller | b8ea248 | 2004-06-18 22:21:55 +1000 | [diff] [blame] | 389 | options.control_master = |
| 390 | (options.control_master >= 1) ? 2 : 1; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 391 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 392 | case 'p': |
Ben Lindstrom | 19066a1 | 2001-04-12 23:39:26 +0000 | [diff] [blame] | 393 | options.port = a2port(optarg); |
| 394 | if (options.port == 0) { |
Ben Lindstrom | 146edb9 | 2001-04-11 23:06:28 +0000 | [diff] [blame] | 395 | fprintf(stderr, "Bad port '%s'\n", optarg); |
| 396 | exit(1); |
| 397 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 398 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 399 | case 'l': |
| 400 | options.user = optarg; |
| 401 | break; |
Ben Lindstrom | 1a17471 | 2001-09-12 17:56:15 +0000 | [diff] [blame] | 402 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 403 | case 'L': |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 404 | if (parse_forward(&fwd, optarg)) |
| 405 | add_local_forward(&options, &fwd); |
| 406 | else { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 407 | fprintf(stderr, |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 408 | "Bad local forwarding specification '%s'\n", |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 409 | optarg); |
Ben Lindstrom | 1a17471 | 2001-09-12 17:56:15 +0000 | [diff] [blame] | 410 | exit(1); |
| 411 | } |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 412 | break; |
| 413 | |
| 414 | case 'R': |
| 415 | if (parse_forward(&fwd, optarg)) { |
| 416 | add_remote_forward(&options, &fwd); |
| 417 | } else { |
| 418 | fprintf(stderr, |
| 419 | "Bad remote forwarding specification " |
| 420 | "'%s'\n", optarg); |
| 421 | exit(1); |
| 422 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 423 | break; |
Ben Lindstrom | 3bb4f9d | 2001-04-08 18:30:26 +0000 | [diff] [blame] | 424 | |
| 425 | case 'D': |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 426 | cp = p = xstrdup(optarg); |
| 427 | memset(&fwd, '\0', sizeof(fwd)); |
| 428 | fwd.connect_host = "socks"; |
| 429 | if ((fwd.listen_host = hpdelim(&cp)) == NULL) { |
| 430 | fprintf(stderr, "Bad dynamic forwarding " |
| 431 | "specification '%.100s'\n", optarg); |
| 432 | exit(1); |
| 433 | } |
| 434 | if (cp != NULL) { |
| 435 | fwd.listen_port = a2port(cp); |
| 436 | fwd.listen_host = cleanhostname(fwd.listen_host); |
| 437 | } else { |
| 438 | fwd.listen_port = a2port(fwd.listen_host); |
| 439 | fwd.listen_host = ""; |
| 440 | } |
| 441 | |
| 442 | if (fwd.listen_port == 0) { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 443 | fprintf(stderr, "Bad dynamic port '%s'\n", |
| 444 | optarg); |
Ben Lindstrom | 146edb9 | 2001-04-11 23:06:28 +0000 | [diff] [blame] | 445 | exit(1); |
| 446 | } |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 447 | add_local_forward(&options, &fwd); |
| 448 | xfree(p); |
Ben Lindstrom | 3bb4f9d | 2001-04-08 18:30:26 +0000 | [diff] [blame] | 449 | break; |
| 450 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 451 | case 'C': |
| 452 | options.compression = 1; |
| 453 | break; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 454 | case 'N': |
| 455 | no_shell_flag = 1; |
| 456 | no_tty_flag = 1; |
| 457 | break; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 458 | case 'T': |
| 459 | no_tty_flag = 1; |
| 460 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 461 | case 'o': |
| 462 | dummy = 1; |
Damien Miller | 9836cf8 | 2003-12-17 16:30:06 +1100 | [diff] [blame] | 463 | line = xstrdup(optarg); |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 464 | if (process_config_line(&options, host ? host : "", |
Damien Miller | 9836cf8 | 2003-12-17 16:30:06 +1100 | [diff] [blame] | 465 | line, "command-line", 0, &dummy) != 0) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 466 | exit(1); |
Damien Miller | 9836cf8 | 2003-12-17 16:30:06 +1100 | [diff] [blame] | 467 | xfree(line); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 468 | break; |
Damien Miller | 832562e | 2001-01-30 09:30:01 +1100 | [diff] [blame] | 469 | case 's': |
| 470 | subsystem_flag = 1; |
| 471 | break; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 472 | case 'S': |
| 473 | if (options.control_path != NULL) |
| 474 | free(options.control_path); |
| 475 | options.control_path = xstrdup(optarg); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 476 | break; |
Ben Lindstrom | e0f8804 | 2001-04-30 13:06:24 +0000 | [diff] [blame] | 477 | case 'b': |
| 478 | options.bind_address = optarg; |
| 479 | break; |
Ben Lindstrom | 14f31ab | 2001-09-12 17:48:04 +0000 | [diff] [blame] | 480 | case 'F': |
| 481 | config = optarg; |
| 482 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 483 | default: |
| 484 | usage(); |
| 485 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 486 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 487 | |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 488 | ac -= optind; |
| 489 | av += optind; |
| 490 | |
| 491 | if (ac > 0 && !host && **av != '-') { |
Ben Lindstrom | c276c12 | 2002-12-23 02:14:51 +0000 | [diff] [blame] | 492 | if (strrchr(*av, '@')) { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 493 | p = xstrdup(*av); |
Ben Lindstrom | c276c12 | 2002-12-23 02:14:51 +0000 | [diff] [blame] | 494 | cp = strrchr(p, '@'); |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 495 | if (cp == NULL || cp == p) |
| 496 | usage(); |
| 497 | options.user = p; |
| 498 | *cp = '\0'; |
| 499 | host = ++cp; |
| 500 | } else |
| 501 | host = *av; |
Ben Lindstrom | b9fa691 | 2002-12-23 02:24:54 +0000 | [diff] [blame] | 502 | if (ac > 1) { |
| 503 | optind = optreset = 1; |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 504 | goto again; |
| 505 | } |
Ben Lindstrom | b9fa691 | 2002-12-23 02:24:54 +0000 | [diff] [blame] | 506 | ac--, av++; |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 507 | } |
| 508 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 509 | /* Check that we got a host name. */ |
| 510 | if (!host) |
| 511 | usage(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 512 | |
Damien Miller | cb5e44a | 2000-09-29 12:12:36 +1100 | [diff] [blame] | 513 | SSLeay_add_all_algorithms(); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 514 | ERR_load_crypto_strings(); |
Damien Miller | cb5e44a | 2000-09-29 12:12:36 +1100 | [diff] [blame] | 515 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 516 | /* Initialize the command to execute on remote host. */ |
| 517 | buffer_init(&command); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 518 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 519 | /* |
| 520 | * Save the command to execute on the remote host in a buffer. There |
| 521 | * is no limit on the length of the command, except by the maximum |
| 522 | * packet size. Also sets the tty flag if there is no command. |
| 523 | */ |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 524 | if (!ac) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 525 | /* No command specified - execute shell on a tty. */ |
| 526 | tty_flag = 1; |
Damien Miller | 832562e | 2001-01-30 09:30:01 +1100 | [diff] [blame] | 527 | if (subsystem_flag) { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 528 | fprintf(stderr, |
| 529 | "You must specify a subsystem to invoke.\n"); |
Damien Miller | 832562e | 2001-01-30 09:30:01 +1100 | [diff] [blame] | 530 | usage(); |
| 531 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 532 | } else { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 533 | /* A command has been specified. Store it into the buffer. */ |
| 534 | for (i = 0; i < ac; i++) { |
| 535 | if (i) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 536 | buffer_append(&command, " ", 1); |
| 537 | buffer_append(&command, av[i], strlen(av[i])); |
| 538 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 539 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 540 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 541 | /* Cannot fork to background if no command. */ |
Damien Miller | caf6dd6 | 2000-08-29 11:33:50 +1100 | [diff] [blame] | 542 | if (fork_after_authentication_flag && buffer_len(&command) == 0 && !no_shell_flag) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 543 | fatal("Cannot fork into background without a command to execute."); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 544 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 545 | /* Allocate a tty by default if no command specified. */ |
| 546 | if (buffer_len(&command) == 0) |
| 547 | tty_flag = 1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 548 | |
Ben Lindstrom | a962c2f | 2002-07-04 00:14:17 +0000 | [diff] [blame] | 549 | /* Force no tty */ |
Ben Lindstrom | c72745a | 2000-12-02 19:03:54 +0000 | [diff] [blame] | 550 | if (no_tty_flag) |
| 551 | tty_flag = 0; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 552 | /* Do not allocate a tty if stdin is not a tty. */ |
Damien Miller | ddee575 | 2005-05-26 12:05:05 +1000 | [diff] [blame] | 553 | if ((!isatty(fileno(stdin)) || stdin_null_flag) && !force_tty_flag) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 554 | if (tty_flag) |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 555 | logit("Pseudo-terminal will not be allocated because stdin is not a terminal."); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 556 | tty_flag = 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 557 | } |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 558 | |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 559 | /* |
| 560 | * Initialize "log" output. Since we are the client all output |
| 561 | * actually goes to stderr. |
| 562 | */ |
Ben Lindstrom | 2b64652 | 2001-04-12 16:16:57 +0000 | [diff] [blame] | 563 | log_init(av[0], options.log_level == -1 ? SYSLOG_LEVEL_INFO : options.log_level, |
| 564 | SYSLOG_FACILITY_USER, 1); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 565 | |
Ben Lindstrom | 14f31ab | 2001-09-12 17:48:04 +0000 | [diff] [blame] | 566 | /* |
| 567 | * Read per-user configuration file. Ignore the system wide config |
| 568 | * file if the user specifies a config file on the command line. |
| 569 | */ |
| 570 | if (config != NULL) { |
Damien Miller | 914420f | 2004-04-20 20:14:07 +1000 | [diff] [blame] | 571 | if (!read_config_file(config, host, &options, 0)) |
Ben Lindstrom | edc0cf2 | 2001-09-12 18:32:20 +0000 | [diff] [blame] | 572 | fatal("Can't open user config file %.100s: " |
| 573 | "%.100s", config, strerror(errno)); |
Ben Lindstrom | 14f31ab | 2001-09-12 17:48:04 +0000 | [diff] [blame] | 574 | } else { |
| 575 | snprintf(buf, sizeof buf, "%.100s/%.100s", pw->pw_dir, |
| 576 | _PATH_SSH_USER_CONFFILE); |
Damien Miller | 57a4476 | 2004-04-20 20:11:57 +1000 | [diff] [blame] | 577 | (void)read_config_file(buf, host, &options, 1); |
Ben Lindstrom | 83f07d1 | 2001-10-03 17:22:29 +0000 | [diff] [blame] | 578 | |
| 579 | /* Read systemwide configuration file after use config. */ |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 580 | (void)read_config_file(_PATH_HOST_CONFIG_FILE, host, |
Damien Miller | 57a4476 | 2004-04-20 20:11:57 +1000 | [diff] [blame] | 581 | &options, 0); |
Ben Lindstrom | 14f31ab | 2001-09-12 17:48:04 +0000 | [diff] [blame] | 582 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 583 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 584 | /* Fill configuration defaults. */ |
| 585 | fill_default_options(&options); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 586 | |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 587 | channel_set_af(options.address_family); |
| 588 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 589 | /* reinit */ |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 590 | log_init(av[0], options.log_level, SYSLOG_FACILITY_USER, 1); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 591 | |
Damien Miller | 60bc517 | 2001-03-19 09:38:15 +1100 | [diff] [blame] | 592 | seed_rng(); |
| 593 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 594 | if (options.user == NULL) |
| 595 | options.user = xstrdup(pw->pw_name); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 596 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 597 | if (options.hostname != NULL) |
| 598 | host = options.hostname; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 599 | |
Darren Tucker | 3f521e2 | 2003-07-03 16:20:42 +1000 | [diff] [blame] | 600 | /* force lowercase for hostkey matching */ |
| 601 | if (options.host_key_alias != NULL) { |
| 602 | for (p = options.host_key_alias; *p; p++) |
| 603 | if (isupper(*p)) |
| 604 | *p = tolower(*p); |
| 605 | } |
| 606 | |
Damien Miller | 9f1e33a | 2003-02-24 11:57:32 +1100 | [diff] [blame] | 607 | if (options.proxy_command != NULL && |
| 608 | strcmp(options.proxy_command, "none") == 0) |
| 609 | options.proxy_command = NULL; |
| 610 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 611 | if (options.control_path != NULL) { |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame^] | 612 | snprintf(buf, sizeof(buf), "%d", options.port); |
| 613 | cp = tilde_expand_filename(options.control_path, |
| 614 | original_real_uid); |
| 615 | options.control_path = percent_expand(cp, "p", buf, "h", host, |
| 616 | "r", options.user, (char *)NULL); |
| 617 | xfree(cp); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 618 | } |
Darren Tucker | 0814d31 | 2005-06-01 23:08:51 +1000 | [diff] [blame] | 619 | if (mux_command != 0 && options.control_path == NULL) |
| 620 | fatal("No ControlPath specified for \"-O\" command"); |
| 621 | if (options.control_path != NULL && options.control_master == 0) { |
| 622 | if (mux_command == 0) |
| 623 | mux_command = SSHMUX_COMMAND_OPEN; |
Damien Miller | dadfd4d | 2005-05-26 12:07:13 +1000 | [diff] [blame] | 624 | control_client(options.control_path); |
Darren Tucker | 0814d31 | 2005-06-01 23:08:51 +1000 | [diff] [blame] | 625 | } |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 626 | |
Kevin Steves | fcec7f8 | 2000-12-15 19:55:48 +0000 | [diff] [blame] | 627 | /* Open a connection to the remote host. */ |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 628 | if (ssh_connect(host, &hostaddr, options.port, |
| 629 | options.address_family, options.connection_attempts, |
Ben Lindstrom | 1aa6427 | 2002-06-11 20:28:05 +0000 | [diff] [blame] | 630 | #ifdef HAVE_CYGWIN |
| 631 | options.use_privileged_port, |
| 632 | #else |
Ben Lindstrom | f9c4884 | 2002-06-11 16:37:51 +0000 | [diff] [blame] | 633 | original_effective_uid == 0 && options.use_privileged_port, |
Ben Lindstrom | 1aa6427 | 2002-06-11 20:28:05 +0000 | [diff] [blame] | 634 | #endif |
Ben Lindstrom | da394ca | 2002-06-12 16:11:12 +0000 | [diff] [blame] | 635 | options.proxy_command) != 0) |
Ben Lindstrom | 2415757 | 2002-06-12 16:09:39 +0000 | [diff] [blame] | 636 | exit(1); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 637 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 638 | /* |
| 639 | * If we successfully made the connection, load the host private key |
| 640 | * in case we will need it later for combined rsa-rhosts |
| 641 | * authentication. This must be done before releasing extra |
| 642 | * privileges, because the file is only readable by root. |
Ben Lindstrom | 9e5bb57 | 2002-06-06 19:58:27 +0000 | [diff] [blame] | 643 | * If we cannot access the private keys, load the public keys |
| 644 | * instead and try to execute the ssh-keysign helper instead. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 645 | */ |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 646 | sensitive_data.nkeys = 0; |
| 647 | sensitive_data.keys = NULL; |
Ben Lindstrom | 1bad256 | 2002-06-06 19:57:33 +0000 | [diff] [blame] | 648 | sensitive_data.external_keysign = 0; |
Ben Lindstrom | 2415757 | 2002-06-12 16:09:39 +0000 | [diff] [blame] | 649 | if (options.rhosts_rsa_authentication || |
| 650 | options.hostbased_authentication) { |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 651 | sensitive_data.nkeys = 3; |
Ben Lindstrom | a962c2f | 2002-07-04 00:14:17 +0000 | [diff] [blame] | 652 | sensitive_data.keys = xmalloc(sensitive_data.nkeys * |
| 653 | sizeof(Key)); |
Ben Lindstrom | f9c4884 | 2002-06-11 16:37:51 +0000 | [diff] [blame] | 654 | |
| 655 | PRIV_START; |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 656 | sensitive_data.keys[0] = key_load_private_type(KEY_RSA1, |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 657 | _PATH_HOST_KEY_FILE, "", NULL); |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 658 | sensitive_data.keys[1] = key_load_private_type(KEY_DSA, |
| 659 | _PATH_HOST_DSA_KEY_FILE, "", NULL); |
| 660 | sensitive_data.keys[2] = key_load_private_type(KEY_RSA, |
| 661 | _PATH_HOST_RSA_KEY_FILE, "", NULL); |
Ben Lindstrom | f9c4884 | 2002-06-11 16:37:51 +0000 | [diff] [blame] | 662 | PRIV_END; |
Ben Lindstrom | 1bad256 | 2002-06-06 19:57:33 +0000 | [diff] [blame] | 663 | |
Ben Lindstrom | 5d35a2f | 2002-07-04 00:19:40 +0000 | [diff] [blame] | 664 | if (options.hostbased_authentication == 1 && |
| 665 | sensitive_data.keys[0] == NULL && |
Ben Lindstrom | 1bad256 | 2002-06-06 19:57:33 +0000 | [diff] [blame] | 666 | sensitive_data.keys[1] == NULL && |
| 667 | sensitive_data.keys[2] == NULL) { |
| 668 | sensitive_data.keys[1] = key_load_public( |
| 669 | _PATH_HOST_DSA_KEY_FILE, NULL); |
| 670 | sensitive_data.keys[2] = key_load_public( |
| 671 | _PATH_HOST_RSA_KEY_FILE, NULL); |
| 672 | sensitive_data.external_keysign = 1; |
| 673 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 674 | } |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 675 | /* |
| 676 | * Get rid of any extra privileges that we may have. We will no |
| 677 | * longer need them. Also, extra privileges could make it very hard |
| 678 | * to read identity files and other non-world-readable files from the |
| 679 | * user's home directory if it happens to be on a NFS volume where |
| 680 | * root is mapped to nobody. |
| 681 | */ |
Darren Tucker | 25f60a7 | 2004-08-15 17:23:34 +1000 | [diff] [blame] | 682 | if (original_effective_uid == 0) { |
| 683 | PRIV_START; |
| 684 | permanently_set_uid(pw); |
| 685 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 686 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 687 | /* |
| 688 | * Now that we are back to our own permissions, create ~/.ssh |
| 689 | * directory if it doesn\'t already exist. |
| 690 | */ |
Ben Lindstrom | 930b14a | 2001-08-15 23:19:21 +0000 | [diff] [blame] | 691 | snprintf(buf, sizeof buf, "%.100s%s%.100s", pw->pw_dir, strcmp(pw->pw_dir, "/") ? "/" : "", _PATH_SSH_USER_DIR); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 692 | if (stat(buf, &st) < 0) |
Damien Miller | be484b5 | 2000-07-15 14:14:16 +1000 | [diff] [blame] | 693 | if (mkdir(buf, 0700) < 0) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 694 | error("Could not create directory '%.200s'.", buf); |
| 695 | |
Ben Lindstrom | 266dfdf | 2001-03-09 00:12:22 +0000 | [diff] [blame] | 696 | /* load options.identity_files */ |
| 697 | load_public_identity_files(); |
| 698 | |
| 699 | /* Expand ~ in known host file names. */ |
| 700 | /* XXX mem-leaks: */ |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 701 | options.system_hostfile = |
| 702 | tilde_expand_filename(options.system_hostfile, original_real_uid); |
| 703 | options.user_hostfile = |
| 704 | tilde_expand_filename(options.user_hostfile, original_real_uid); |
| 705 | options.system_hostfile2 = |
| 706 | tilde_expand_filename(options.system_hostfile2, original_real_uid); |
| 707 | options.user_hostfile2 = |
| 708 | tilde_expand_filename(options.user_hostfile2, original_real_uid); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 709 | |
Damien Miller | 07cd589 | 2001-11-12 10:52:03 +1100 | [diff] [blame] | 710 | signal(SIGPIPE, SIG_IGN); /* ignore SIGPIPE early */ |
| 711 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 712 | /* Log into the remote system. This never returns if the login fails. */ |
Ben Lindstrom | 1bad256 | 2002-06-06 19:57:33 +0000 | [diff] [blame] | 713 | ssh_login(&sensitive_data, host, (struct sockaddr *)&hostaddr, pw); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 714 | |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 715 | /* We no longer need the private host keys. Clear them now. */ |
| 716 | if (sensitive_data.nkeys != 0) { |
| 717 | for (i = 0; i < sensitive_data.nkeys; i++) { |
| 718 | if (sensitive_data.keys[i] != NULL) { |
| 719 | /* Destroys contents safely */ |
| 720 | debug3("clear hostkey %d", i); |
| 721 | key_free(sensitive_data.keys[i]); |
| 722 | sensitive_data.keys[i] = NULL; |
| 723 | } |
| 724 | } |
| 725 | xfree(sensitive_data.keys); |
| 726 | } |
Ben Lindstrom | a6c8a8d | 2001-08-06 21:42:00 +0000 | [diff] [blame] | 727 | for (i = 0; i < options.num_identity_files; i++) { |
| 728 | if (options.identity_files[i]) { |
| 729 | xfree(options.identity_files[i]); |
| 730 | options.identity_files[i] = NULL; |
| 731 | } |
| 732 | if (options.identity_keys[i]) { |
| 733 | key_free(options.identity_keys[i]); |
| 734 | options.identity_keys[i] = NULL; |
| 735 | } |
| 736 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 737 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 738 | exit_status = compat20 ? ssh_session2() : ssh_session(); |
| 739 | packet_close(); |
Damien Miller | 8c4e18a | 2002-09-19 12:05:02 +1000 | [diff] [blame] | 740 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 741 | if (options.control_path != NULL && control_fd != -1) |
| 742 | unlink(options.control_path); |
| 743 | |
Damien Miller | 8c4e18a | 2002-09-19 12:05:02 +1000 | [diff] [blame] | 744 | /* |
Damien Miller | a8e06ce | 2003-11-21 23:48:55 +1100 | [diff] [blame] | 745 | * Send SIGHUP to proxy command if used. We don't wait() in |
Damien Miller | 8c4e18a | 2002-09-19 12:05:02 +1000 | [diff] [blame] | 746 | * case it hangs and instead rely on init to reap the child |
| 747 | */ |
| 748 | if (proxy_command_pid > 1) |
| 749 | kill(proxy_command_pid, SIGHUP); |
| 750 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 751 | return exit_status; |
| 752 | } |
| 753 | |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 754 | #define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1" |
| 755 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 756 | static void |
Ben Lindstrom | 4a4bd71 | 2001-12-06 17:45:19 +0000 | [diff] [blame] | 757 | x11_get_proto(char **_proto, char **_data) |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 758 | { |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 759 | char cmd[1024]; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 760 | char line[512]; |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 761 | char xdisplay[512]; |
Ben Lindstrom | 4a4bd71 | 2001-12-06 17:45:19 +0000 | [diff] [blame] | 762 | static char proto[512], data[512]; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 763 | FILE *f; |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 764 | int got_data = 0, generated = 0, do_unlink = 0, i; |
| 765 | char *display, *xauthdir, *xauthfile; |
Ben Lindstrom | ee8d52d | 2002-07-23 21:03:02 +0000 | [diff] [blame] | 766 | struct stat st; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 767 | |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 768 | xauthdir = xauthfile = NULL; |
Ben Lindstrom | 4a4bd71 | 2001-12-06 17:45:19 +0000 | [diff] [blame] | 769 | *_proto = proto; |
| 770 | *_data = data; |
| 771 | proto[0] = data[0] = '\0'; |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 772 | |
Ben Lindstrom | ee8d52d | 2002-07-23 21:03:02 +0000 | [diff] [blame] | 773 | if (!options.xauth_location || |
| 774 | (stat(options.xauth_location, &st) == -1)) { |
| 775 | debug("No xauth program."); |
| 776 | } else { |
| 777 | if ((display = getenv("DISPLAY")) == NULL) { |
| 778 | debug("x11_get_proto: DISPLAY not set"); |
| 779 | return; |
| 780 | } |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 781 | /* |
| 782 | * Handle FamilyLocal case where $DISPLAY does |
| 783 | * not match an authorization entry. For this we |
| 784 | * just try "xauth list unix:displaynum.screennum". |
| 785 | * XXX: "localhost" match to determine FamilyLocal |
| 786 | * is not perfect. |
| 787 | */ |
| 788 | if (strncmp(display, "localhost:", 10) == 0) { |
| 789 | snprintf(xdisplay, sizeof(xdisplay), "unix:%s", |
| 790 | display + 10); |
| 791 | display = xdisplay; |
| 792 | } |
| 793 | if (options.forward_x11_trusted == 0) { |
| 794 | xauthdir = xmalloc(MAXPATHLEN); |
| 795 | xauthfile = xmalloc(MAXPATHLEN); |
| 796 | strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN); |
| 797 | if (mkdtemp(xauthdir) != NULL) { |
| 798 | do_unlink = 1; |
| 799 | snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile", |
| 800 | xauthdir); |
| 801 | snprintf(cmd, sizeof(cmd), |
| 802 | "%s -f %s generate %s " SSH_X11_PROTO |
Damien Miller | 3df755e | 2004-03-22 09:34:26 +1100 | [diff] [blame] | 803 | " untrusted timeout 1200 2>" _PATH_DEVNULL, |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 804 | options.xauth_location, xauthfile, display); |
| 805 | debug2("x11_get_proto: %s", cmd); |
| 806 | if (system(cmd) == 0) |
| 807 | generated = 1; |
| 808 | } |
| 809 | } |
| 810 | snprintf(cmd, sizeof(cmd), |
| 811 | "%s %s%s list %s . 2>" _PATH_DEVNULL, |
| 812 | options.xauth_location, |
| 813 | generated ? "-f " : "" , |
| 814 | generated ? xauthfile : "", |
| 815 | display); |
| 816 | debug2("x11_get_proto: %s", cmd); |
| 817 | f = popen(cmd, "r"); |
Damien Miller | d3a1857 | 2000-06-07 19:55:44 +1000 | [diff] [blame] | 818 | if (f && fgets(line, sizeof(line), f) && |
Ben Lindstrom | 4a4bd71 | 2001-12-06 17:45:19 +0000 | [diff] [blame] | 819 | sscanf(line, "%*s %511s %511s", proto, data) == 2) |
Damien Miller | d3a1857 | 2000-06-07 19:55:44 +1000 | [diff] [blame] | 820 | got_data = 1; |
| 821 | if (f) |
| 822 | pclose(f); |
| 823 | } |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 824 | |
| 825 | if (do_unlink) { |
| 826 | unlink(xauthfile); |
| 827 | rmdir(xauthdir); |
| 828 | } |
| 829 | if (xauthdir) |
| 830 | xfree(xauthdir); |
| 831 | if (xauthfile) |
| 832 | xfree(xauthfile); |
| 833 | |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 834 | /* |
| 835 | * If we didn't get authentication data, just make up some |
| 836 | * data. The forwarding code will check the validity of the |
| 837 | * response anyway, and substitute this data. The X11 |
| 838 | * server, however, will ignore this fake data and use |
| 839 | * whatever authentication mechanisms it was using otherwise |
| 840 | * for the local connection. |
| 841 | */ |
| 842 | if (!got_data) { |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 843 | u_int32_t rnd = 0; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 844 | |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 845 | logit("Warning: No xauth data; " |
| 846 | "using fake authentication data for X11 forwarding."); |
| 847 | strlcpy(proto, SSH_X11_PROTO, sizeof proto); |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 848 | for (i = 0; i < 16; i++) { |
| 849 | if (i % 4 == 0) |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 850 | rnd = arc4random(); |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 851 | snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 852 | rnd & 0xff); |
| 853 | rnd >>= 8; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 854 | } |
| 855 | } |
| 856 | } |
| 857 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 858 | static void |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 859 | ssh_init_forwarding(void) |
| 860 | { |
Kevin Steves | 1205750 | 2001-02-05 14:54:34 +0000 | [diff] [blame] | 861 | int success = 0; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 862 | int i; |
Kevin Steves | 1205750 | 2001-02-05 14:54:34 +0000 | [diff] [blame] | 863 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 864 | /* Initiate local TCP/IP port forwardings. */ |
| 865 | for (i = 0; i < options.num_local_forwards; i++) { |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 866 | debug("Local connections to %.200s:%d forwarded to remote " |
| 867 | "address %.200s:%d", |
Darren Tucker | 47eede7 | 2005-03-14 23:08:12 +1100 | [diff] [blame] | 868 | (options.local_forwards[i].listen_host == NULL) ? |
| 869 | (options.gateway_ports ? "*" : "LOCALHOST") : |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 870 | options.local_forwards[i].listen_host, |
| 871 | options.local_forwards[i].listen_port, |
| 872 | options.local_forwards[i].connect_host, |
| 873 | options.local_forwards[i].connect_port); |
Damien Miller | b16461c | 2002-01-22 23:29:22 +1100 | [diff] [blame] | 874 | success += channel_setup_local_fwd_listener( |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 875 | options.local_forwards[i].listen_host, |
| 876 | options.local_forwards[i].listen_port, |
| 877 | options.local_forwards[i].connect_host, |
| 878 | options.local_forwards[i].connect_port, |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 879 | options.gateway_ports); |
| 880 | } |
Kevin Steves | 1205750 | 2001-02-05 14:54:34 +0000 | [diff] [blame] | 881 | if (i > 0 && success == 0) |
| 882 | error("Could not request local forwarding."); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 883 | |
| 884 | /* Initiate remote TCP/IP port forwardings. */ |
| 885 | for (i = 0; i < options.num_remote_forwards; i++) { |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 886 | debug("Remote connections from %.200s:%d forwarded to " |
| 887 | "local address %.200s:%d", |
Darren Tucker | 73ba437 | 2005-03-31 21:51:54 +1000 | [diff] [blame] | 888 | (options.remote_forwards[i].listen_host == NULL) ? |
| 889 | (options.gateway_ports ? "*" : "LOCALHOST") : |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 890 | options.remote_forwards[i].listen_host, |
| 891 | options.remote_forwards[i].listen_port, |
| 892 | options.remote_forwards[i].connect_host, |
| 893 | options.remote_forwards[i].connect_port); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 894 | channel_request_remote_forwarding( |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 895 | options.remote_forwards[i].listen_host, |
| 896 | options.remote_forwards[i].listen_port, |
| 897 | options.remote_forwards[i].connect_host, |
| 898 | options.remote_forwards[i].connect_port); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 899 | } |
| 900 | } |
| 901 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 902 | static void |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 903 | check_agent_present(void) |
| 904 | { |
| 905 | if (options.forward_agent) { |
| 906 | /* Clear agent forwarding if we don\'t have an agent. */ |
Damien Miller | 789e95d | 2002-09-12 09:52:46 +1000 | [diff] [blame] | 907 | if (!ssh_agent_present()) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 908 | options.forward_agent = 0; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 909 | } |
| 910 | } |
| 911 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 912 | static int |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 913 | ssh_session(void) |
| 914 | { |
| 915 | int type; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 916 | int interactive = 0; |
| 917 | int have_tty = 0; |
| 918 | struct winsize ws; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 919 | char *cp; |
| 920 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 921 | /* Enable compression if requested. */ |
| 922 | if (options.compression) { |
| 923 | debug("Requesting compression at level %d.", options.compression_level); |
| 924 | |
| 925 | if (options.compression_level < 1 || options.compression_level > 9) |
| 926 | fatal("Compression level must be from 1 (fast) to 9 (slow, best)."); |
| 927 | |
| 928 | /* Send the request. */ |
| 929 | packet_start(SSH_CMSG_REQUEST_COMPRESSION); |
| 930 | packet_put_int(options.compression_level); |
| 931 | packet_send(); |
| 932 | packet_write_wait(); |
Damien Miller | dff5099 | 2002-01-22 23:16:32 +1100 | [diff] [blame] | 933 | type = packet_read(); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 934 | if (type == SSH_SMSG_SUCCESS) |
| 935 | packet_start_compression(options.compression_level); |
| 936 | else if (type == SSH_SMSG_FAILURE) |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 937 | logit("Warning: Remote host refused compression."); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 938 | else |
| 939 | packet_disconnect("Protocol error waiting for compression response."); |
| 940 | } |
| 941 | /* Allocate a pseudo tty if appropriate. */ |
| 942 | if (tty_flag) { |
| 943 | debug("Requesting pty."); |
| 944 | |
| 945 | /* Start the packet. */ |
| 946 | packet_start(SSH_CMSG_REQUEST_PTY); |
| 947 | |
| 948 | /* Store TERM in the packet. There is no limit on the |
| 949 | length of the string. */ |
| 950 | cp = getenv("TERM"); |
| 951 | if (!cp) |
| 952 | cp = ""; |
Ben Lindstrom | 664408d | 2001-06-09 01:42:01 +0000 | [diff] [blame] | 953 | packet_put_cstring(cp); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 954 | |
| 955 | /* Store window size in the packet. */ |
| 956 | if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) |
| 957 | memset(&ws, 0, sizeof(ws)); |
| 958 | packet_put_int(ws.ws_row); |
| 959 | packet_put_int(ws.ws_col); |
| 960 | packet_put_int(ws.ws_xpixel); |
| 961 | packet_put_int(ws.ws_ypixel); |
| 962 | |
| 963 | /* Store tty modes in the packet. */ |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 964 | tty_make_modes(fileno(stdin), NULL); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 965 | |
| 966 | /* Send the packet, and wait for it to leave. */ |
| 967 | packet_send(); |
| 968 | packet_write_wait(); |
| 969 | |
| 970 | /* Read response from the server. */ |
Damien Miller | dff5099 | 2002-01-22 23:16:32 +1100 | [diff] [blame] | 971 | type = packet_read(); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 972 | if (type == SSH_SMSG_SUCCESS) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 973 | interactive = 1; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 974 | have_tty = 1; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 975 | } else if (type == SSH_SMSG_FAILURE) |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 976 | logit("Warning: Remote host failed or refused to allocate a pseudo tty."); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 977 | else |
| 978 | packet_disconnect("Protocol error waiting for pty request response."); |
| 979 | } |
| 980 | /* Request X11 forwarding if enabled and DISPLAY is set. */ |
| 981 | if (options.forward_x11 && getenv("DISPLAY") != NULL) { |
Ben Lindstrom | 4a4bd71 | 2001-12-06 17:45:19 +0000 | [diff] [blame] | 982 | char *proto, *data; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 983 | /* Get reasonable local authentication information. */ |
Ben Lindstrom | 4a4bd71 | 2001-12-06 17:45:19 +0000 | [diff] [blame] | 984 | x11_get_proto(&proto, &data); |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 985 | /* Request forwarding with authentication spoofing. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 986 | debug("Requesting X11 forwarding with authentication spoofing."); |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 987 | x11_request_forwarding_with_spoofing(0, proto, data); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 988 | |
| 989 | /* Read response from the server. */ |
Damien Miller | dff5099 | 2002-01-22 23:16:32 +1100 | [diff] [blame] | 990 | type = packet_read(); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 991 | if (type == SSH_SMSG_SUCCESS) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 992 | interactive = 1; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 993 | } else if (type == SSH_SMSG_FAILURE) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 994 | logit("Warning: Remote host denied X11 forwarding."); |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 995 | } else { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 996 | packet_disconnect("Protocol error waiting for X11 forwarding"); |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 997 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 998 | } |
| 999 | /* Tell the packet module whether this is an interactive session. */ |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 1000 | packet_set_interactive(interactive); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1001 | |
| 1002 | /* Request authentication agent forwarding if appropriate. */ |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1003 | check_agent_present(); |
| 1004 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1005 | if (options.forward_agent) { |
| 1006 | debug("Requesting authentication agent forwarding."); |
| 1007 | auth_request_forwarding(); |
| 1008 | |
| 1009 | /* Read response from the server. */ |
Damien Miller | dff5099 | 2002-01-22 23:16:32 +1100 | [diff] [blame] | 1010 | type = packet_read(); |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1011 | packet_check_eom(); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1012 | if (type != SSH_SMSG_SUCCESS) |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 1013 | logit("Warning: Remote host denied authentication agent forwarding."); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1014 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1015 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1016 | /* Initiate port forwardings. */ |
| 1017 | ssh_init_forwarding(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1018 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1019 | /* If requested, let ssh continue in the background. */ |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 1020 | if (fork_after_authentication_flag) |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1021 | if (daemon(1, 1) < 0) |
| 1022 | fatal("daemon() failed: %.200s", strerror(errno)); |
| 1023 | |
| 1024 | /* |
| 1025 | * If a command was specified on the command line, execute the |
| 1026 | * command now. Otherwise request the server to start a shell. |
| 1027 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1028 | if (buffer_len(&command) > 0) { |
| 1029 | int len = buffer_len(&command); |
| 1030 | if (len > 900) |
| 1031 | len = 900; |
Damien Miller | 5a6b4fe | 2001-12-21 14:56:54 +1100 | [diff] [blame] | 1032 | debug("Sending command: %.*s", len, (u_char *)buffer_ptr(&command)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1033 | packet_start(SSH_CMSG_EXEC_CMD); |
| 1034 | packet_put_string(buffer_ptr(&command), buffer_len(&command)); |
| 1035 | packet_send(); |
| 1036 | packet_write_wait(); |
| 1037 | } else { |
| 1038 | debug("Requesting shell."); |
| 1039 | packet_start(SSH_CMSG_EXEC_SHELL); |
| 1040 | packet_send(); |
| 1041 | packet_write_wait(); |
| 1042 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1043 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1044 | /* Enter the interactive session. */ |
Ben Lindstrom | 2b1f71b | 2001-06-05 20:32:21 +0000 | [diff] [blame] | 1045 | return client_loop(have_tty, tty_flag ? |
| 1046 | options.escape_char : SSH_ESCAPECHAR_NONE, 0); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1047 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1048 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1049 | static void |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1050 | ssh_subsystem_reply(int type, u_int32_t seq, void *ctxt) |
Ben Lindstrom | 1e7d306 | 2001-02-09 02:36:43 +0000 | [diff] [blame] | 1051 | { |
| 1052 | int id, len; |
| 1053 | |
| 1054 | id = packet_get_int(); |
| 1055 | len = buffer_len(&command); |
Ben Lindstrom | 4040fe1 | 2001-03-05 06:52:57 +0000 | [diff] [blame] | 1056 | if (len > 900) |
| 1057 | len = 900; |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 1058 | packet_check_eom(); |
Ben Lindstrom | 1e7d306 | 2001-02-09 02:36:43 +0000 | [diff] [blame] | 1059 | if (type == SSH2_MSG_CHANNEL_FAILURE) |
| 1060 | fatal("Request for subsystem '%.*s' failed on channel %d", |
Damien Miller | 5a6b4fe | 2001-12-21 14:56:54 +1100 | [diff] [blame] | 1061 | len, (u_char *)buffer_ptr(&command), id); |
Ben Lindstrom | 1e7d306 | 2001-02-09 02:36:43 +0000 | [diff] [blame] | 1062 | } |
| 1063 | |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 1064 | void |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 1065 | client_global_request_reply_fwd(int type, u_int32_t seq, void *ctxt) |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 1066 | { |
| 1067 | int i; |
| 1068 | |
| 1069 | i = client_global_request_id++; |
Damien Miller | 509b010 | 2003-12-17 16:33:10 +1100 | [diff] [blame] | 1070 | if (i >= options.num_remote_forwards) |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 1071 | return; |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 1072 | debug("remote forward %s for: listen %d, connect %s:%d", |
| 1073 | type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure", |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1074 | options.remote_forwards[i].listen_port, |
| 1075 | options.remote_forwards[i].connect_host, |
| 1076 | options.remote_forwards[i].connect_port); |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 1077 | if (type == SSH2_MSG_REQUEST_FAILURE) |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1078 | logit("Warning: remote port forwarding failed for listen " |
| 1079 | "port %d", options.remote_forwards[i].listen_port); |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 1080 | } |
| 1081 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1082 | static void |
| 1083 | ssh_control_listener(void) |
| 1084 | { |
| 1085 | struct sockaddr_un addr; |
| 1086 | mode_t old_umask; |
Damien Miller | 07b6ff1 | 2004-06-15 11:14:45 +1000 | [diff] [blame] | 1087 | int addr_len; |
| 1088 | |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 1089 | if (options.control_path == NULL || options.control_master <= 0) |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1090 | return; |
| 1091 | |
| 1092 | memset(&addr, '\0', sizeof(addr)); |
| 1093 | addr.sun_family = AF_UNIX; |
Damien Miller | 07b6ff1 | 2004-06-15 11:14:45 +1000 | [diff] [blame] | 1094 | addr_len = offsetof(struct sockaddr_un, sun_path) + |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1095 | strlen(options.control_path) + 1; |
| 1096 | |
| 1097 | if (strlcpy(addr.sun_path, options.control_path, |
| 1098 | sizeof(addr.sun_path)) >= sizeof(addr.sun_path)) |
| 1099 | fatal("ControlPath too long"); |
| 1100 | |
| 1101 | if ((control_fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
| 1102 | fatal("%s socket(): %s\n", __func__, strerror(errno)); |
| 1103 | |
| 1104 | old_umask = umask(0177); |
Damien Miller | 07b6ff1 | 2004-06-15 11:14:45 +1000 | [diff] [blame] | 1105 | if (bind(control_fd, (struct sockaddr*)&addr, addr_len) == -1) { |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1106 | control_fd = -1; |
Damien Miller | 4f10e25 | 2005-05-04 15:33:09 +1000 | [diff] [blame] | 1107 | if (errno == EINVAL || errno == EADDRINUSE) |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1108 | fatal("ControlSocket %s already exists", |
| 1109 | options.control_path); |
| 1110 | else |
| 1111 | fatal("%s bind(): %s\n", __func__, strerror(errno)); |
| 1112 | } |
| 1113 | umask(old_umask); |
| 1114 | |
| 1115 | if (listen(control_fd, 64) == -1) |
| 1116 | fatal("%s listen(): %s\n", __func__, strerror(errno)); |
| 1117 | |
| 1118 | set_nonblock(control_fd); |
| 1119 | } |
| 1120 | |
Ben Lindstrom | f558cf6 | 2001-09-20 23:13:49 +0000 | [diff] [blame] | 1121 | /* request pty/x11/agent/tcpfwd/shell for channel */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1122 | static void |
Ben Lindstrom | f558cf6 | 2001-09-20 23:13:49 +0000 | [diff] [blame] | 1123 | ssh_session2_setup(int id, void *arg) |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1124 | { |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 1125 | extern char **environ; |
| 1126 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1127 | int interactive = tty_flag; |
| 1128 | if (options.forward_x11 && getenv("DISPLAY") != NULL) { |
Ben Lindstrom | 4a4bd71 | 2001-12-06 17:45:19 +0000 | [diff] [blame] | 1129 | char *proto, *data; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1130 | /* Get reasonable local authentication information. */ |
Ben Lindstrom | 4a4bd71 | 2001-12-06 17:45:19 +0000 | [diff] [blame] | 1131 | x11_get_proto(&proto, &data); |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1132 | /* Request forwarding with authentication spoofing. */ |
| 1133 | debug("Requesting X11 forwarding with authentication spoofing."); |
| 1134 | x11_request_forwarding_with_spoofing(id, proto, data); |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 1135 | interactive = 1; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1136 | /* XXX wait for reply */ |
| 1137 | } |
| 1138 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1139 | check_agent_present(); |
| 1140 | if (options.forward_agent) { |
| 1141 | debug("Requesting authentication agent forwarding."); |
| 1142 | channel_request_start(id, "auth-agent-req@openssh.com", 0); |
| 1143 | packet_send(); |
| 1144 | } |
| 1145 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1146 | client_session2_setup(id, tty_flag, subsystem_flag, getenv("TERM"), |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 1147 | NULL, fileno(stdin), &command, environ, &ssh_subsystem_reply); |
Ben Lindstrom | 1e7d306 | 2001-02-09 02:36:43 +0000 | [diff] [blame] | 1148 | |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 1149 | packet_set_interactive(interactive); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1150 | } |
| 1151 | |
Ben Lindstrom | f558cf6 | 2001-09-20 23:13:49 +0000 | [diff] [blame] | 1152 | /* open new channel for a session */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1153 | static int |
Ben Lindstrom | f558cf6 | 2001-09-20 23:13:49 +0000 | [diff] [blame] | 1154 | ssh_session2_open(void) |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1155 | { |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1156 | Channel *c; |
| 1157 | int window, packetmax, in, out, err; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1158 | |
Damien Miller | caf6dd6 | 2000-08-29 11:33:50 +1100 | [diff] [blame] | 1159 | if (stdin_null_flag) { |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 1160 | in = open(_PATH_DEVNULL, O_RDONLY); |
Damien Miller | caf6dd6 | 2000-08-29 11:33:50 +1100 | [diff] [blame] | 1161 | } else { |
| 1162 | in = dup(STDIN_FILENO); |
| 1163 | } |
| 1164 | out = dup(STDOUT_FILENO); |
| 1165 | err = dup(STDERR_FILENO); |
| 1166 | |
| 1167 | if (in < 0 || out < 0 || err < 0) |
| 1168 | fatal("dup() in/out/err failed"); |
| 1169 | |
Damien Miller | 69b69aa | 2000-10-28 14:19:58 +1100 | [diff] [blame] | 1170 | /* enable nonblocking unless tty */ |
| 1171 | if (!isatty(in)) |
| 1172 | set_nonblock(in); |
| 1173 | if (!isatty(out)) |
| 1174 | set_nonblock(out); |
| 1175 | if (!isatty(err)) |
| 1176 | set_nonblock(err); |
| 1177 | |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 1178 | window = CHAN_SES_WINDOW_DEFAULT; |
| 1179 | packetmax = CHAN_SES_PACKET_DEFAULT; |
Damien Miller | 19a5945 | 2002-02-19 15:20:57 +1100 | [diff] [blame] | 1180 | if (tty_flag) { |
| 1181 | window >>= 1; |
| 1182 | packetmax >>= 1; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1183 | } |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1184 | c = channel_new( |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1185 | "session", SSH_CHANNEL_OPENING, in, out, err, |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 1186 | window, packetmax, CHAN_EXTENDED_WRITE, |
Damien Miller | b1ca8bb | 2003-05-14 13:45:42 +1000 | [diff] [blame] | 1187 | "client-session", /*nonblock*/0); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1188 | |
Ben Lindstrom | f558cf6 | 2001-09-20 23:13:49 +0000 | [diff] [blame] | 1189 | debug3("ssh_session2_open: channel_new: %d", c->self); |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1190 | |
Ben Lindstrom | 5ec2645 | 2001-06-09 00:18:51 +0000 | [diff] [blame] | 1191 | channel_send_open(c->self); |
Ben Lindstrom | f558cf6 | 2001-09-20 23:13:49 +0000 | [diff] [blame] | 1192 | if (!no_shell_flag) |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1193 | channel_register_confirm(c->self, ssh_session2_setup, NULL); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1194 | |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1195 | return c->self; |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1196 | } |
| 1197 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1198 | static int |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1199 | ssh_session2(void) |
| 1200 | { |
Ben Lindstrom | f558cf6 | 2001-09-20 23:13:49 +0000 | [diff] [blame] | 1201 | int id = -1; |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1202 | |
| 1203 | /* XXX should be pre-session */ |
| 1204 | ssh_init_forwarding(); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1205 | ssh_control_listener(); |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1206 | |
Ben Lindstrom | f558cf6 | 2001-09-20 23:13:49 +0000 | [diff] [blame] | 1207 | if (!no_shell_flag || (datafellows & SSH_BUG_DUMMYCHAN)) |
| 1208 | id = ssh_session2_open(); |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1209 | |
| 1210 | /* If requested, let ssh continue in the background. */ |
| 1211 | if (fork_after_authentication_flag) |
| 1212 | if (daemon(1, 1) < 0) |
| 1213 | fatal("daemon() failed: %.200s", strerror(errno)); |
| 1214 | |
Ben Lindstrom | 2b1f71b | 2001-06-05 20:32:21 +0000 | [diff] [blame] | 1215 | return client_loop(tty_flag, tty_flag ? |
| 1216 | options.escape_char : SSH_ESCAPECHAR_NONE, id); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1217 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1218 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1219 | static void |
Ben Lindstrom | 266dfdf | 2001-03-09 00:12:22 +0000 | [diff] [blame] | 1220 | load_public_identity_files(void) |
| 1221 | { |
| 1222 | char *filename; |
Ben Lindstrom | 711b04a | 2001-08-06 21:12:42 +0000 | [diff] [blame] | 1223 | int i = 0; |
Ben Lindstrom | 0936a5b | 2002-03-26 03:17:42 +0000 | [diff] [blame] | 1224 | Key *public; |
Ben Lindstrom | 711b04a | 2001-08-06 21:12:42 +0000 | [diff] [blame] | 1225 | #ifdef SMARTCARD |
Ben Lindstrom | 0936a5b | 2002-03-26 03:17:42 +0000 | [diff] [blame] | 1226 | Key **keys; |
| 1227 | |
Ben Lindstrom | f7db3bb | 2001-08-06 21:35:51 +0000 | [diff] [blame] | 1228 | if (options.smartcard_device != NULL && |
Ben Lindstrom | 0936a5b | 2002-03-26 03:17:42 +0000 | [diff] [blame] | 1229 | options.num_identity_files < SSH_MAX_IDENTITY_FILES && |
| 1230 | (keys = sc_get_keys(options.smartcard_device, NULL)) != NULL ) { |
| 1231 | int count = 0; |
| 1232 | for (i = 0; keys[i] != NULL; i++) { |
| 1233 | count++; |
Ben Lindstrom | 0936a5b | 2002-03-26 03:17:42 +0000 | [diff] [blame] | 1234 | memmove(&options.identity_files[1], &options.identity_files[0], |
| 1235 | sizeof(char *) * (SSH_MAX_IDENTITY_FILES - 1)); |
| 1236 | memmove(&options.identity_keys[1], &options.identity_keys[0], |
| 1237 | sizeof(Key *) * (SSH_MAX_IDENTITY_FILES - 1)); |
| 1238 | options.num_identity_files++; |
| 1239 | options.identity_keys[0] = keys[i]; |
Damien Miller | 56a0bb0 | 2003-06-18 20:28:40 +1000 | [diff] [blame] | 1240 | options.identity_files[0] = sc_get_key_label(keys[i]); |
Ben Lindstrom | 0936a5b | 2002-03-26 03:17:42 +0000 | [diff] [blame] | 1241 | } |
Ben Lindstrom | 4f05460 | 2002-03-26 03:23:00 +0000 | [diff] [blame] | 1242 | if (options.num_identity_files > SSH_MAX_IDENTITY_FILES) |
| 1243 | options.num_identity_files = SSH_MAX_IDENTITY_FILES; |
Ben Lindstrom | 0936a5b | 2002-03-26 03:17:42 +0000 | [diff] [blame] | 1244 | i = count; |
| 1245 | xfree(keys); |
Ben Lindstrom | 711b04a | 2001-08-06 21:12:42 +0000 | [diff] [blame] | 1246 | } |
Ben Lindstrom | ffce147 | 2001-08-06 21:57:31 +0000 | [diff] [blame] | 1247 | #endif /* SMARTCARD */ |
Ben Lindstrom | 711b04a | 2001-08-06 21:12:42 +0000 | [diff] [blame] | 1248 | for (; i < options.num_identity_files; i++) { |
Ben Lindstrom | 266dfdf | 2001-03-09 00:12:22 +0000 | [diff] [blame] | 1249 | filename = tilde_expand_filename(options.identity_files[i], |
| 1250 | original_real_uid); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 1251 | public = key_load_public(filename, NULL); |
Ben Lindstrom | 266dfdf | 2001-03-09 00:12:22 +0000 | [diff] [blame] | 1252 | debug("identity file %s type %d", filename, |
| 1253 | public ? public->type : -1); |
| 1254 | xfree(options.identity_files[i]); |
| 1255 | options.identity_files[i] = filename; |
| 1256 | options.identity_keys[i] = public; |
| 1257 | } |
| 1258 | } |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1259 | |
| 1260 | static void |
| 1261 | control_client_sighandler(int signo) |
| 1262 | { |
| 1263 | control_client_terminate = signo; |
| 1264 | } |
| 1265 | |
| 1266 | static void |
| 1267 | control_client_sigrelay(int signo) |
| 1268 | { |
| 1269 | if (control_server_pid > 1) |
| 1270 | kill(control_server_pid, signo); |
| 1271 | } |
| 1272 | |
Darren Tucker | 365433f | 2004-06-22 12:29:23 +1000 | [diff] [blame] | 1273 | static int |
| 1274 | env_permitted(char *env) |
| 1275 | { |
| 1276 | int i; |
| 1277 | char name[1024], *cp; |
| 1278 | |
| 1279 | strlcpy(name, env, sizeof(name)); |
| 1280 | if ((cp = strchr(name, '=')) == NULL) |
| 1281 | return (0); |
| 1282 | |
| 1283 | *cp = '\0'; |
| 1284 | |
| 1285 | for (i = 0; i < options.num_send_env; i++) |
| 1286 | if (match_pattern(name, options.send_env[i])) |
| 1287 | return (1); |
| 1288 | |
| 1289 | return (0); |
| 1290 | } |
| 1291 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1292 | static void |
| 1293 | control_client(const char *path) |
| 1294 | { |
| 1295 | struct sockaddr_un addr; |
Darren Tucker | 39207a4 | 2004-11-05 20:19:51 +1100 | [diff] [blame] | 1296 | int i, r, fd, sock, exitval, num_env, addr_len; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1297 | Buffer m; |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 1298 | char *term; |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 1299 | extern char **environ; |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 1300 | u_int flags; |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 1301 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1302 | memset(&addr, '\0', sizeof(addr)); |
| 1303 | addr.sun_family = AF_UNIX; |
Damien Miller | 07b6ff1 | 2004-06-15 11:14:45 +1000 | [diff] [blame] | 1304 | addr_len = offsetof(struct sockaddr_un, sun_path) + |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1305 | strlen(path) + 1; |
| 1306 | |
| 1307 | if (strlcpy(addr.sun_path, path, |
| 1308 | sizeof(addr.sun_path)) >= sizeof(addr.sun_path)) |
| 1309 | fatal("ControlPath too long"); |
| 1310 | |
| 1311 | if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
| 1312 | fatal("%s socket(): %s", __func__, strerror(errno)); |
| 1313 | |
Damien Miller | dadfd4d | 2005-05-26 12:07:13 +1000 | [diff] [blame] | 1314 | if (connect(sock, (struct sockaddr*)&addr, addr_len) == -1) { |
Darren Tucker | 0814d31 | 2005-06-01 23:08:51 +1000 | [diff] [blame] | 1315 | if (mux_command != SSHMUX_COMMAND_OPEN) { |
| 1316 | fatal("Control socket connect(%.100s): %s", path, |
| 1317 | strerror(errno)); |
| 1318 | } |
Damien Miller | 538c9b7 | 2005-05-26 12:11:28 +1000 | [diff] [blame] | 1319 | if (errno == ENOENT) |
| 1320 | debug("Control socket \"%.100s\" does not exist", path); |
| 1321 | else { |
| 1322 | error("Control socket connect(%.100s): %s", path, |
| 1323 | strerror(errno)); |
| 1324 | } |
Damien Miller | dadfd4d | 2005-05-26 12:07:13 +1000 | [diff] [blame] | 1325 | close(sock); |
| 1326 | return; |
| 1327 | } |
| 1328 | |
| 1329 | if (stdin_null_flag) { |
| 1330 | if ((fd = open(_PATH_DEVNULL, O_RDONLY)) == -1) |
| 1331 | fatal("open(/dev/null): %s", strerror(errno)); |
| 1332 | if (dup2(fd, STDIN_FILENO) == -1) |
| 1333 | fatal("dup2: %s", strerror(errno)); |
| 1334 | if (fd > STDERR_FILENO) |
| 1335 | close(fd); |
| 1336 | } |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1337 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 1338 | if ((term = getenv("TERM")) == NULL) |
| 1339 | term = ""; |
| 1340 | |
| 1341 | flags = 0; |
| 1342 | if (tty_flag) |
| 1343 | flags |= SSHMUX_FLAG_TTY; |
| 1344 | if (subsystem_flag) |
| 1345 | flags |= SSHMUX_FLAG_SUBSYS; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1346 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1347 | buffer_init(&m); |
| 1348 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 1349 | /* Send our command to server */ |
| 1350 | buffer_put_int(&m, mux_command); |
| 1351 | buffer_put_int(&m, flags); |
| 1352 | if (ssh_msg_send(sock, /* version */1, &m) == -1) |
| 1353 | fatal("%s: msg_send", __func__); |
| 1354 | buffer_clear(&m); |
| 1355 | |
| 1356 | /* Get authorisation status and PID of controlee */ |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1357 | if (ssh_msg_recv(sock, &m) == -1) |
| 1358 | fatal("%s: msg_recv", __func__); |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 1359 | if (buffer_get_char(&m) != 1) |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1360 | fatal("%s: wrong version", __func__); |
Damien Miller | 23f0770 | 2004-06-18 01:19:03 +1000 | [diff] [blame] | 1361 | if (buffer_get_int(&m) != 1) |
| 1362 | fatal("Connection to master denied"); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1363 | control_server_pid = buffer_get_int(&m); |
| 1364 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1365 | buffer_clear(&m); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1366 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 1367 | switch (mux_command) { |
| 1368 | case SSHMUX_COMMAND_ALIVE_CHECK: |
Darren Tucker | 47eede7 | 2005-03-14 23:08:12 +1100 | [diff] [blame] | 1369 | fprintf(stderr, "Master running (pid=%d)\r\n", |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 1370 | control_server_pid); |
| 1371 | exit(0); |
| 1372 | case SSHMUX_COMMAND_TERMINATE: |
| 1373 | fprintf(stderr, "Exit request sent.\r\n"); |
| 1374 | exit(0); |
| 1375 | case SSHMUX_COMMAND_OPEN: |
| 1376 | /* continue below */ |
| 1377 | break; |
| 1378 | default: |
| 1379 | fatal("silly mux_command %d", mux_command); |
| 1380 | } |
| 1381 | |
| 1382 | /* SSHMUX_COMMAND_OPEN */ |
| 1383 | buffer_put_cstring(&m, term); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1384 | buffer_append(&command, "\0", 1); |
| 1385 | buffer_put_cstring(&m, buffer_ptr(&command)); |
| 1386 | |
Darren Tucker | 365433f | 2004-06-22 12:29:23 +1000 | [diff] [blame] | 1387 | if (options.num_send_env == 0 || environ == NULL) { |
| 1388 | buffer_put_int(&m, 0); |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 1389 | } else { |
Darren Tucker | 365433f | 2004-06-22 12:29:23 +1000 | [diff] [blame] | 1390 | /* Pass environment */ |
| 1391 | num_env = 0; |
| 1392 | for (i = 0; environ[i] != NULL; i++) |
| 1393 | if (env_permitted(environ[i])) |
| 1394 | num_env++; /* Count */ |
Darren Tucker | fc95970 | 2004-07-17 16:12:08 +1000 | [diff] [blame] | 1395 | |
Darren Tucker | 365433f | 2004-06-22 12:29:23 +1000 | [diff] [blame] | 1396 | buffer_put_int(&m, num_env); |
| 1397 | |
Darren Tucker | b5bc1a6 | 2004-06-24 00:34:53 +1000 | [diff] [blame] | 1398 | for (i = 0; environ[i] != NULL && num_env >= 0; i++) |
| 1399 | if (env_permitted(environ[i])) { |
| 1400 | num_env--; |
Darren Tucker | 365433f | 2004-06-22 12:29:23 +1000 | [diff] [blame] | 1401 | buffer_put_cstring(&m, environ[i]); |
Darren Tucker | b5bc1a6 | 2004-06-24 00:34:53 +1000 | [diff] [blame] | 1402 | } |
Darren Tucker | 365433f | 2004-06-22 12:29:23 +1000 | [diff] [blame] | 1403 | } |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 1404 | |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 1405 | if (ssh_msg_send(sock, /* version */1, &m) == -1) |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1406 | fatal("%s: msg_send", __func__); |
| 1407 | |
| 1408 | mm_send_fd(sock, STDIN_FILENO); |
| 1409 | mm_send_fd(sock, STDOUT_FILENO); |
| 1410 | mm_send_fd(sock, STDERR_FILENO); |
| 1411 | |
| 1412 | /* Wait for reply, so master has a chance to gather ttymodes */ |
| 1413 | buffer_clear(&m); |
| 1414 | if (ssh_msg_recv(sock, &m) == -1) |
| 1415 | fatal("%s: msg_recv", __func__); |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 1416 | if (buffer_get_char(&m) != 1) |
| 1417 | fatal("%s: wrong version", __func__); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1418 | buffer_free(&m); |
| 1419 | |
Darren Tucker | 07336da | 2004-11-05 20:02:16 +1100 | [diff] [blame] | 1420 | signal(SIGHUP, control_client_sighandler); |
Damien Miller | 0809e23 | 2004-06-18 22:20:57 +1000 | [diff] [blame] | 1421 | signal(SIGINT, control_client_sighandler); |
| 1422 | signal(SIGTERM, control_client_sighandler); |
| 1423 | signal(SIGWINCH, control_client_sigrelay); |
| 1424 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1425 | if (tty_flag) |
| 1426 | enter_raw_mode(); |
| 1427 | |
| 1428 | /* Stick around until the controlee closes the client_fd */ |
| 1429 | exitval = 0; |
| 1430 | for (;!control_client_terminate;) { |
| 1431 | r = read(sock, &exitval, sizeof(exitval)); |
| 1432 | if (r == 0) { |
| 1433 | debug2("Received EOF from master"); |
| 1434 | break; |
| 1435 | } |
| 1436 | if (r > 0) |
| 1437 | debug2("Received exit status from master %d", exitval); |
| 1438 | if (r == -1 && errno != EINTR) |
| 1439 | fatal("%s: read %s", __func__, strerror(errno)); |
| 1440 | } |
| 1441 | |
| 1442 | if (control_client_terminate) |
| 1443 | debug2("Exiting on signal %d", control_client_terminate); |
| 1444 | |
| 1445 | close(sock); |
| 1446 | |
| 1447 | leave_raw_mode(); |
| 1448 | |
| 1449 | if (tty_flag && options.log_level != SYSLOG_LEVEL_QUIET) |
| 1450 | fprintf(stderr, "Connection to master closed.\r\n"); |
| 1451 | |
| 1452 | exit(exitval); |
| 1453 | } |