djm@openbsd.org | fbe24b1 | 2019-09-13 04:27:35 +0000 | [diff] [blame] | 1 | /* $OpenBSD: ssh.c,v 1.507 2019/09/13 04:27:35 djm Exp $ */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 2 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 5 | * All rights reserved |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 6 | * Ssh client program. This program can be used to log into a remote machine. |
| 7 | * The software supports strong authentication, encryption, and forwarding |
| 8 | * of X11, TCP/IP, and authentication connections. |
| 9 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 10 | * As far as I am concerned, the code I have written for this software |
| 11 | * can be used freely for any purpose. Any derived versions of this |
| 12 | * software must be clearly marked as such, and if the derived work is |
| 13 | * incompatible with the protocol description in the RFC file, it must be |
| 14 | * called by a name other than "ssh" or "Secure Shell". |
| 15 | * |
| 16 | * Copyright (c) 1999 Niels Provos. All rights reserved. |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 17 | * Copyright (c) 2000, 2001, 2002, 2003 Markus Friedl. All rights reserved. |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 18 | * |
| 19 | * Modified to work with SSL by Niels Provos <provos@citi.umich.edu> |
| 20 | * in Canada (German citizen). |
| 21 | * |
| 22 | * Redistribution and use in source and binary forms, with or without |
| 23 | * modification, are permitted provided that the following conditions |
| 24 | * are met: |
| 25 | * 1. Redistributions of source code must retain the above copyright |
| 26 | * notice, this list of conditions and the following disclaimer. |
| 27 | * 2. Redistributions in binary form must reproduce the above copyright |
| 28 | * notice, this list of conditions and the following disclaimer in the |
| 29 | * documentation and/or other materials provided with the distribution. |
| 30 | * |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 32 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 33 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 34 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 35 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 36 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 37 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 38 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 39 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 40 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 41 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 42 | |
| 43 | #include "includes.h" |
Damien Miller | cd4223c | 2006-03-15 11:22:47 +1100 | [diff] [blame] | 44 | |
Damien Miller | f17883e | 2006-03-15 11:45:54 +1100 | [diff] [blame] | 45 | #include <sys/types.h> |
| 46 | #ifdef HAVE_SYS_STAT_H |
| 47 | # include <sys/stat.h> |
| 48 | #endif |
Damien Miller | cd4223c | 2006-03-15 11:22:47 +1100 | [diff] [blame] | 49 | #include <sys/resource.h> |
Damien Miller | 17e91c0 | 2006-03-15 11:28:34 +1100 | [diff] [blame] | 50 | #include <sys/ioctl.h> |
Damien Miller | e3b60b5 | 2006-07-10 21:08:03 +1000 | [diff] [blame] | 51 | #include <sys/socket.h> |
Damien Miller | 857b02e | 2010-09-24 22:02:56 +1000 | [diff] [blame] | 52 | #include <sys/wait.h> |
Damien Miller | 03e2003 | 2006-03-15 11:16:59 +1100 | [diff] [blame] | 53 | |
Damien Miller | c7b0636 | 2006-03-15 11:53:45 +1100 | [diff] [blame] | 54 | #include <ctype.h> |
Darren Tucker | ba72405 | 2006-07-12 22:24:22 +1000 | [diff] [blame] | 55 | #include <errno.h> |
Damien Miller | 57cf638 | 2006-07-10 21:13:46 +1000 | [diff] [blame] | 56 | #include <fcntl.h> |
Damien Miller | b8fe89c | 2006-07-24 14:51:00 +1000 | [diff] [blame] | 57 | #include <netdb.h> |
Damien Miller | 6645e7a | 2006-03-15 14:42:54 +1100 | [diff] [blame] | 58 | #ifdef HAVE_PATHS_H |
Damien Miller | 03e2003 | 2006-03-15 11:16:59 +1100 | [diff] [blame] | 59 | #include <paths.h> |
Damien Miller | 6645e7a | 2006-03-15 14:42:54 +1100 | [diff] [blame] | 60 | #endif |
Damien Miller | 9f2abc4 | 2006-07-10 20:53:08 +1000 | [diff] [blame] | 61 | #include <pwd.h> |
Damien Miller | 6ff3cad | 2006-03-15 11:52:09 +1100 | [diff] [blame] | 62 | #include <signal.h> |
Damien Miller | ded319c | 2006-09-01 15:38:36 +1000 | [diff] [blame] | 63 | #include <stdarg.h> |
Damien Miller | 2d00e63 | 2006-07-24 13:53:19 +1000 | [diff] [blame] | 64 | #include <stddef.h> |
Damien Miller | a7a73ee | 2006-08-05 11:37:59 +1000 | [diff] [blame] | 65 | #include <stdio.h> |
Damien Miller | e7a1e5c | 2006-08-05 11:34:19 +1000 | [diff] [blame] | 66 | #include <stdlib.h> |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 67 | #include <string.h> |
Damien Miller | e6b3b61 | 2006-07-24 14:01:23 +1000 | [diff] [blame] | 68 | #include <unistd.h> |
deraadt@openbsd.org | 087266e | 2015-01-20 23:14:00 +0000 | [diff] [blame] | 69 | #include <limits.h> |
djm@openbsd.org | 65c6c6b | 2016-07-17 04:20:16 +0000 | [diff] [blame] | 70 | #include <locale.h> |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 71 | |
Darren Tucker | 46aa3e0 | 2006-09-02 15:32:40 +1000 | [diff] [blame] | 72 | #include <netinet/in.h> |
| 73 | #include <arpa/inet.h> |
| 74 | |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 75 | #ifdef WITH_OPENSSL |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 76 | #include <openssl/evp.h> |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 77 | #include <openssl/err.h> |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 78 | #endif |
Darren Tucker | bfaaf96 | 2008-02-28 19:13:52 +1100 | [diff] [blame] | 79 | #include "openbsd-compat/openssl-compat.h" |
Damien Miller | b84886b | 2008-05-19 15:05:07 +1000 | [diff] [blame] | 80 | #include "openbsd-compat/sys-queue.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 81 | |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 82 | #include "xmalloc.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 83 | #include "ssh.h" |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 84 | #include "ssh2.h" |
Damien Miller | b96c441 | 2010-07-02 13:34:24 +1000 | [diff] [blame] | 85 | #include "canohost.h" |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 86 | #include "compat.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 87 | #include "cipher.h" |
Damien Miller | 9c38643 | 2014-07-03 21:27:46 +1000 | [diff] [blame] | 88 | #include "digest.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 89 | #include "packet.h" |
markus@openbsd.org | cecee2d | 2018-07-09 21:03:30 +0000 | [diff] [blame] | 90 | #include "sshbuf.h" |
Ben Lindstrom | c763767 | 2001-06-09 00:36:26 +0000 | [diff] [blame] | 91 | #include "channels.h" |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 92 | #include "sshkey.h" |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 93 | #include "authfd.h" |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 94 | #include "authfile.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 95 | #include "pathnames.h" |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 96 | #include "dispatch.h" |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 97 | #include "clientloop.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 98 | #include "log.h" |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 99 | #include "misc.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 100 | #include "readconf.h" |
| 101 | #include "sshconnect.h" |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 102 | #include "kex.h" |
| 103 | #include "mac.h" |
Darren Tucker | 06f2bd8 | 2004-05-13 16:06:46 +1000 | [diff] [blame] | 104 | #include "sshpty.h" |
Darren Tucker | 46bc075 | 2004-05-02 22:11:30 +1000 | [diff] [blame] | 105 | #include "match.h" |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 106 | #include "msg.h" |
Damien Miller | b757677 | 2006-07-10 20:23:39 +1000 | [diff] [blame] | 107 | #include "version.h" |
djm@openbsd.org | 141efe4 | 2015-01-14 20:05:27 +0000 | [diff] [blame] | 108 | #include "ssherr.h" |
djm@openbsd.org | f9eca24 | 2015-07-30 00:01:34 +0000 | [diff] [blame] | 109 | #include "myproposal.h" |
Damien Miller | dda78a0 | 2016-12-12 13:57:10 +1100 | [diff] [blame] | 110 | #include "utf8.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 111 | |
Damien Miller | 7ea845e | 2010-02-12 09:21:02 +1100 | [diff] [blame] | 112 | #ifdef ENABLE_PKCS11 |
| 113 | #include "ssh-pkcs11.h" |
Ben Lindstrom | bcc1808 | 2001-08-06 21:59:25 +0000 | [diff] [blame] | 114 | #endif |
Ben Lindstrom | c5b6800 | 2001-07-04 04:52:03 +0000 | [diff] [blame] | 115 | |
Damien Miller | 3f90587 | 1999-11-15 17:10:57 +1100 | [diff] [blame] | 116 | extern char *__progname; |
Damien Miller | 3f90587 | 1999-11-15 17:10:57 +1100 | [diff] [blame] | 117 | |
Damien Miller | ea2c1a4 | 2011-06-03 12:10:22 +1000 | [diff] [blame] | 118 | /* Saves a copy of argv for setproctitle emulation */ |
| 119 | #ifndef HAVE_SETPROCTITLE |
| 120 | static char **saved_av; |
| 121 | #endif |
| 122 | |
Darren Tucker | d6173c0 | 2008-06-13 04:52:53 +1000 | [diff] [blame] | 123 | /* Flag indicating whether debug mode is on. May be set on the command line. */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 124 | int debug_flag = 0; |
| 125 | |
Damien Miller | 21771e2 | 2011-05-15 08:45:50 +1000 | [diff] [blame] | 126 | /* Flag indicating whether a tty should be requested */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 127 | int tty_flag = 0; |
| 128 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 129 | /* don't exec a shell */ |
| 130 | int no_shell_flag = 0; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 131 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 132 | /* |
| 133 | * Flag indicating that nothing should be read from stdin. This can be set |
| 134 | * on the command line. |
| 135 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 136 | int stdin_null_flag = 0; |
| 137 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 138 | /* |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 139 | * Flag indicating that the current process should be backgrounded and |
| 140 | * a new slave launched in the foreground for ControlPersist. |
| 141 | */ |
| 142 | int need_controlpersist_detach = 0; |
| 143 | |
| 144 | /* Copies of flags for ControlPersist foreground slave */ |
Damien Miller | 21771e2 | 2011-05-15 08:45:50 +1000 | [diff] [blame] | 145 | int ostdin_null_flag, ono_shell_flag, otty_flag, orequest_tty; |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 146 | |
| 147 | /* |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 148 | * Flag indicating that ssh should fork after authentication. This is useful |
Ben Lindstrom | f666fec | 2002-06-06 19:51:58 +0000 | [diff] [blame] | 149 | * 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] | 150 | * background. |
| 151 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 152 | int fork_after_authentication_flag = 0; |
| 153 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 154 | /* |
| 155 | * General data structure for command line options and options configurable |
| 156 | * in configuration files. See readconf.h. |
| 157 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 158 | Options options; |
| 159 | |
Ben Lindstrom | 14f31ab | 2001-09-12 17:48:04 +0000 | [diff] [blame] | 160 | /* optional user configfile */ |
| 161 | char *config = NULL; |
| 162 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 163 | /* |
| 164 | * Name of the host we are connecting to. This is the name given on the |
jmc@openbsd.org | 7349149 | 2019-06-12 11:31:50 +0000 | [diff] [blame] | 165 | * command line, or the Hostname specified for the user-supplied name in a |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 166 | * configuration file. |
| 167 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 168 | char *host; |
| 169 | |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 170 | /* Various strings used to to percent_expand() arguments */ |
| 171 | static char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV]; |
| 172 | static char uidstr[32], *host_arg, *conn_hash_hex; |
| 173 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 174 | /* socket address the host resolves to */ |
Damien Miller | 34132e5 | 2000-01-14 15:45:46 +1100 | [diff] [blame] | 175 | struct sockaddr_storage hostaddr; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 176 | |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 177 | /* Private host keys. */ |
Ben Lindstrom | 1bad256 | 2002-06-06 19:57:33 +0000 | [diff] [blame] | 178 | Sensitive sensitive_data; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 179 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 180 | /* command to be executed */ |
markus@openbsd.org | cecee2d | 2018-07-09 21:03:30 +0000 | [diff] [blame] | 181 | struct sshbuf *command; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 182 | |
Damien Miller | 832562e | 2001-01-30 09:30:01 +1100 | [diff] [blame] | 183 | /* Should we execute a command or invoke a subsystem? */ |
| 184 | int subsystem_flag = 0; |
| 185 | |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 186 | /* # of replies received for global requests */ |
Darren Tucker | 9f407c4 | 2008-06-13 04:50:27 +1000 | [diff] [blame] | 187 | static int remote_forward_confirms_received = 0; |
Damien Miller | 2797f7f | 2002-04-23 21:09:44 +1000 | [diff] [blame] | 188 | |
Damien Miller | b1cbfa2 | 2008-05-19 16:00:08 +1000 | [diff] [blame] | 189 | /* mux.c */ |
| 190 | extern int muxserver_sock; |
| 191 | extern u_int muxclient_command; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 192 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 193 | /* Prints a help message to the user. This function never returns. */ |
| 194 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 195 | static void |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 196 | usage(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 197 | { |
Damien Miller | 5095510 | 2004-03-22 09:34:58 +1100 | [diff] [blame] | 198 | fprintf(stderr, |
djm@openbsd.org | ac2e302 | 2018-02-23 02:34:33 +0000 | [diff] [blame] | 199 | "usage: ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-B bind_interface]\n" |
| 200 | " [-b bind_address] [-c cipher_spec] [-D [bind_address:]port]\n" |
| 201 | " [-E log_file] [-e escape_char] [-F configfile] [-I pkcs11]\n" |
| 202 | " [-i identity_file] [-J [user@]host[:port]] [-L address]\n" |
| 203 | " [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]\n" |
| 204 | " [-Q query_option] [-R address] [-S ctl_path] [-W host:port]\n" |
| 205 | " [-w local_tun[:remote_tun]] destination [command]\n" |
Damien Miller | 5095510 | 2004-03-22 09:34:58 +1100 | [diff] [blame] | 206 | ); |
Darren Tucker | e9a9b71 | 2005-12-20 16:15:51 +1100 | [diff] [blame] | 207 | exit(255); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 208 | } |
| 209 | |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 210 | static int ssh_session2(struct ssh *, struct passwd *); |
| 211 | static void load_public_identity_files(struct passwd *); |
Damien Miller | 857b02e | 2010-09-24 22:02:56 +1000 | [diff] [blame] | 212 | static void main_sigchld_handler(int); |
Damien Miller | b1cbfa2 | 2008-05-19 16:00:08 +1000 | [diff] [blame] | 213 | |
Damien Miller | 295ee63 | 2011-05-29 21:42:31 +1000 | [diff] [blame] | 214 | /* ~/ expand a list of paths. NB. assumes path[n] is heap-allocated. */ |
| 215 | static void |
| 216 | tilde_expand_paths(char **paths, u_int num_paths) |
| 217 | { |
| 218 | u_int i; |
| 219 | char *cp; |
| 220 | |
| 221 | for (i = 0; i < num_paths; i++) { |
dtucker@openbsd.org | e655ee0 | 2018-07-27 05:34:42 +0000 | [diff] [blame] | 222 | cp = tilde_expand_filename(paths[i], getuid()); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 223 | free(paths[i]); |
Damien Miller | 295ee63 | 2011-05-29 21:42:31 +1000 | [diff] [blame] | 224 | paths[i] = cp; |
| 225 | } |
| 226 | } |
| 227 | |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 228 | /* |
| 229 | * Attempt to resolve a host name / port to a set of addresses and |
| 230 | * optionally return any CNAMEs encountered along the way. |
| 231 | * Returns NULL on failure. |
| 232 | * NB. this function must operate with a options having undefined members. |
| 233 | */ |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 234 | static struct addrinfo * |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 235 | resolve_host(const char *name, int port, int logerr, char *cname, size_t clen) |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 236 | { |
| 237 | char strport[NI_MAXSERV]; |
| 238 | struct addrinfo hints, *res; |
dtucker@openbsd.org | 3a7db91 | 2019-04-23 11:56:41 +0000 | [diff] [blame] | 239 | int gaierr; |
| 240 | LogLevel loglevel = SYSLOG_LEVEL_DEBUG1; |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 241 | |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 242 | if (port <= 0) |
| 243 | port = default_ssh_port(); |
| 244 | |
djm@openbsd.org | b1d38a3 | 2015-10-15 23:51:40 +0000 | [diff] [blame] | 245 | snprintf(strport, sizeof strport, "%d", port); |
Damien Miller | 1d2c456 | 2014-02-04 11:18:20 +1100 | [diff] [blame] | 246 | memset(&hints, 0, sizeof(hints)); |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 247 | hints.ai_family = options.address_family == -1 ? |
| 248 | AF_UNSPEC : options.address_family; |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 249 | hints.ai_socktype = SOCK_STREAM; |
| 250 | if (cname != NULL) |
| 251 | hints.ai_flags = AI_CANONNAME; |
| 252 | if ((gaierr = getaddrinfo(name, strport, &hints, &res)) != 0) { |
| 253 | if (logerr || (gaierr != EAI_NONAME && gaierr != EAI_NODATA)) |
| 254 | loglevel = SYSLOG_LEVEL_ERROR; |
| 255 | do_log2(loglevel, "%s: Could not resolve hostname %.100s: %s", |
| 256 | __progname, name, ssh_gai_strerror(gaierr)); |
| 257 | return NULL; |
| 258 | } |
| 259 | if (cname != NULL && res->ai_canonname != NULL) { |
| 260 | if (strlcpy(cname, res->ai_canonname, clen) >= clen) { |
| 261 | error("%s: host \"%s\" cname \"%s\" too long (max %lu)", |
| 262 | __func__, name, res->ai_canonname, (u_long)clen); |
| 263 | if (clen > 0) |
| 264 | *cname = '\0'; |
| 265 | } |
| 266 | } |
| 267 | return res; |
| 268 | } |
| 269 | |
djm@openbsd.org | fc21ea9 | 2018-01-23 05:06:25 +0000 | [diff] [blame] | 270 | /* Returns non-zero if name can only be an address and not a hostname */ |
| 271 | static int |
| 272 | is_addr_fast(const char *name) |
| 273 | { |
| 274 | return (strchr(name, '%') != NULL || strchr(name, ':') != NULL || |
| 275 | strspn(name, "0123456789.") == strlen(name)); |
| 276 | } |
| 277 | |
| 278 | /* Returns non-zero if name represents a valid, single address */ |
| 279 | static int |
| 280 | is_addr(const char *name) |
| 281 | { |
| 282 | char strport[NI_MAXSERV]; |
| 283 | struct addrinfo hints, *res; |
| 284 | |
| 285 | if (is_addr_fast(name)) |
| 286 | return 1; |
| 287 | |
| 288 | snprintf(strport, sizeof strport, "%u", default_ssh_port()); |
| 289 | memset(&hints, 0, sizeof(hints)); |
| 290 | hints.ai_family = options.address_family == -1 ? |
| 291 | AF_UNSPEC : options.address_family; |
| 292 | hints.ai_socktype = SOCK_STREAM; |
| 293 | hints.ai_flags = AI_NUMERICHOST|AI_NUMERICSERV; |
| 294 | if (getaddrinfo(name, strport, &hints, &res) != 0) |
| 295 | return 0; |
| 296 | if (res == NULL || res->ai_next != NULL) { |
| 297 | freeaddrinfo(res); |
| 298 | return 0; |
| 299 | } |
| 300 | freeaddrinfo(res); |
| 301 | return 1; |
| 302 | } |
| 303 | |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 304 | /* |
djm@openbsd.org | 9010902 | 2015-01-16 07:19:48 +0000 | [diff] [blame] | 305 | * Attempt to resolve a numeric host address / port to a single address. |
| 306 | * Returns a canonical address string. |
| 307 | * Returns NULL on failure. |
| 308 | * NB. this function must operate with a options having undefined members. |
| 309 | */ |
| 310 | static struct addrinfo * |
| 311 | resolve_addr(const char *name, int port, char *caddr, size_t clen) |
| 312 | { |
| 313 | char addr[NI_MAXHOST], strport[NI_MAXSERV]; |
| 314 | struct addrinfo hints, *res; |
| 315 | int gaierr; |
| 316 | |
| 317 | if (port <= 0) |
| 318 | port = default_ssh_port(); |
| 319 | snprintf(strport, sizeof strport, "%u", port); |
| 320 | memset(&hints, 0, sizeof(hints)); |
| 321 | hints.ai_family = options.address_family == -1 ? |
| 322 | AF_UNSPEC : options.address_family; |
| 323 | hints.ai_socktype = SOCK_STREAM; |
| 324 | hints.ai_flags = AI_NUMERICHOST|AI_NUMERICSERV; |
| 325 | if ((gaierr = getaddrinfo(name, strport, &hints, &res)) != 0) { |
| 326 | debug2("%s: could not resolve name %.100s as address: %s", |
| 327 | __func__, name, ssh_gai_strerror(gaierr)); |
| 328 | return NULL; |
| 329 | } |
| 330 | if (res == NULL) { |
| 331 | debug("%s: getaddrinfo %.100s returned no addresses", |
| 332 | __func__, name); |
| 333 | return NULL; |
| 334 | } |
| 335 | if (res->ai_next != NULL) { |
| 336 | debug("%s: getaddrinfo %.100s returned multiple addresses", |
| 337 | __func__, name); |
| 338 | goto fail; |
| 339 | } |
| 340 | if ((gaierr = getnameinfo(res->ai_addr, res->ai_addrlen, |
| 341 | addr, sizeof(addr), NULL, 0, NI_NUMERICHOST)) != 0) { |
| 342 | debug("%s: Could not format address for name %.100s: %s", |
| 343 | __func__, name, ssh_gai_strerror(gaierr)); |
| 344 | goto fail; |
| 345 | } |
| 346 | if (strlcpy(caddr, addr, clen) >= clen) { |
| 347 | error("%s: host \"%s\" addr \"%s\" too long (max %lu)", |
| 348 | __func__, name, addr, (u_long)clen); |
| 349 | if (clen > 0) |
| 350 | *caddr = '\0'; |
| 351 | fail: |
| 352 | freeaddrinfo(res); |
| 353 | return NULL; |
| 354 | } |
| 355 | return res; |
| 356 | } |
| 357 | |
| 358 | /* |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 359 | * Check whether the cname is a permitted replacement for the hostname |
| 360 | * and perform the replacement if it is. |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 361 | * NB. this function must operate with a options having undefined members. |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 362 | */ |
| 363 | static int |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 364 | check_follow_cname(int direct, char **namep, const char *cname) |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 365 | { |
| 366 | int i; |
| 367 | struct allowed_cname *rule; |
| 368 | |
| 369 | if (*cname == '\0' || options.num_permitted_cnames == 0 || |
| 370 | strcmp(*namep, cname) == 0) |
| 371 | return 0; |
Damien Miller | 3850559 | 2013-10-17 11:48:13 +1100 | [diff] [blame] | 372 | if (options.canonicalize_hostname == SSH_CANONICALISE_NO) |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 373 | return 0; |
| 374 | /* |
Damien Miller | 3850559 | 2013-10-17 11:48:13 +1100 | [diff] [blame] | 375 | * Don't attempt to canonicalize names that will be interpreted by |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 376 | * a proxy or jump host unless the user specifically requests so. |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 377 | */ |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 378 | if (!direct && |
Damien Miller | 3850559 | 2013-10-17 11:48:13 +1100 | [diff] [blame] | 379 | options.canonicalize_hostname != SSH_CANONICALISE_ALWAYS) |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 380 | return 0; |
| 381 | debug3("%s: check \"%s\" CNAME \"%s\"", __func__, *namep, cname); |
| 382 | for (i = 0; i < options.num_permitted_cnames; i++) { |
| 383 | rule = options.permitted_cnames + i; |
djm@openbsd.org | e661a86 | 2015-05-04 06:10:48 +0000 | [diff] [blame] | 384 | if (match_pattern_list(*namep, rule->source_list, 1) != 1 || |
| 385 | match_pattern_list(cname, rule->target_list, 1) != 1) |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 386 | continue; |
Damien Miller | 3850559 | 2013-10-17 11:48:13 +1100 | [diff] [blame] | 387 | verbose("Canonicalized DNS aliased hostname " |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 388 | "\"%s\" => \"%s\"", *namep, cname); |
| 389 | free(*namep); |
| 390 | *namep = xstrdup(cname); |
| 391 | return 1; |
| 392 | } |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | /* |
| 397 | * Attempt to resolve the supplied hostname after applying the user's |
Damien Miller | 51682fa | 2013-10-17 11:48:31 +1100 | [diff] [blame] | 398 | * canonicalization rules. Returns the address list for the host or NULL |
| 399 | * if no name was found after canonicalization. |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 400 | * NB. this function must operate with a options having undefined members. |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 401 | */ |
| 402 | static struct addrinfo * |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 403 | resolve_canonicalize(char **hostp, int port) |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 404 | { |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 405 | int i, direct, ndots; |
djm@openbsd.org | 9010902 | 2015-01-16 07:19:48 +0000 | [diff] [blame] | 406 | char *cp, *fullhost, newname[NI_MAXHOST]; |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 407 | struct addrinfo *addrs; |
| 408 | |
djm@openbsd.org | fc21ea9 | 2018-01-23 05:06:25 +0000 | [diff] [blame] | 409 | /* |
| 410 | * Attempt to canonicalise addresses, regardless of |
| 411 | * whether hostname canonicalisation was requested |
| 412 | */ |
| 413 | if ((addrs = resolve_addr(*hostp, port, |
| 414 | newname, sizeof(newname))) != NULL) { |
| 415 | debug2("%s: hostname %.100s is address", __func__, *hostp); |
| 416 | if (strcasecmp(*hostp, newname) != 0) { |
| 417 | debug2("%s: canonicalised address \"%s\" => \"%s\"", |
| 418 | __func__, *hostp, newname); |
| 419 | free(*hostp); |
| 420 | *hostp = xstrdup(newname); |
| 421 | } |
| 422 | return addrs; |
| 423 | } |
| 424 | |
| 425 | /* |
| 426 | * If this looks like an address but didn't parse as one, it might |
| 427 | * be an address with an invalid interface scope. Skip further |
| 428 | * attempts at canonicalisation. |
| 429 | */ |
| 430 | if (is_addr_fast(*hostp)) { |
| 431 | debug("%s: hostname %.100s is an unrecognised address", |
| 432 | __func__, *hostp); |
| 433 | return NULL; |
| 434 | } |
| 435 | |
Damien Miller | 3850559 | 2013-10-17 11:48:13 +1100 | [diff] [blame] | 436 | if (options.canonicalize_hostname == SSH_CANONICALISE_NO) |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 437 | return NULL; |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 438 | |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 439 | /* |
Damien Miller | 3850559 | 2013-10-17 11:48:13 +1100 | [diff] [blame] | 440 | * Don't attempt to canonicalize names that will be interpreted by |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 441 | * a proxy unless the user specifically requests so. |
| 442 | */ |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 443 | direct = option_clear_or_none(options.proxy_command) && |
| 444 | options.jump_host == NULL; |
| 445 | if (!direct && |
Damien Miller | 3850559 | 2013-10-17 11:48:13 +1100 | [diff] [blame] | 446 | options.canonicalize_hostname != SSH_CANONICALISE_ALWAYS) |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 447 | return NULL; |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 448 | |
djm@openbsd.org | 5ee0063 | 2015-10-16 18:40:49 +0000 | [diff] [blame] | 449 | /* If domain name is anchored, then resolve it now */ |
| 450 | if ((*hostp)[strlen(*hostp) - 1] == '.') { |
| 451 | debug3("%s: name is fully qualified", __func__); |
| 452 | fullhost = xstrdup(*hostp); |
| 453 | if ((addrs = resolve_host(fullhost, port, 0, |
| 454 | newname, sizeof(newname))) != NULL) |
| 455 | goto found; |
| 456 | free(fullhost); |
| 457 | goto notfound; |
| 458 | } |
| 459 | |
Damien Miller | 51682fa | 2013-10-17 11:48:31 +1100 | [diff] [blame] | 460 | /* Don't apply canonicalization to sufficiently-qualified hostnames */ |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 461 | ndots = 0; |
| 462 | for (cp = *hostp; *cp != '\0'; cp++) { |
| 463 | if (*cp == '.') |
| 464 | ndots++; |
| 465 | } |
Damien Miller | 3850559 | 2013-10-17 11:48:13 +1100 | [diff] [blame] | 466 | if (ndots > options.canonicalize_max_dots) { |
| 467 | debug3("%s: not canonicalizing hostname \"%s\" (max dots %d)", |
| 468 | __func__, *hostp, options.canonicalize_max_dots); |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 469 | return NULL; |
| 470 | } |
| 471 | /* Attempt each supplied suffix */ |
| 472 | for (i = 0; i < options.num_canonical_domains; i++) { |
djm@openbsd.org | 9010902 | 2015-01-16 07:19:48 +0000 | [diff] [blame] | 473 | *newname = '\0'; |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 474 | xasprintf(&fullhost, "%s.%s.", *hostp, |
| 475 | options.canonical_domains[i]); |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 476 | debug3("%s: attempting \"%s\" => \"%s\"", __func__, |
| 477 | *hostp, fullhost); |
| 478 | if ((addrs = resolve_host(fullhost, port, 0, |
djm@openbsd.org | 9010902 | 2015-01-16 07:19:48 +0000 | [diff] [blame] | 479 | newname, sizeof(newname))) == NULL) { |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 480 | free(fullhost); |
| 481 | continue; |
| 482 | } |
djm@openbsd.org | 5ee0063 | 2015-10-16 18:40:49 +0000 | [diff] [blame] | 483 | found: |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 484 | /* Remove trailing '.' */ |
| 485 | fullhost[strlen(fullhost) - 1] = '\0'; |
| 486 | /* Follow CNAME if requested */ |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 487 | if (!check_follow_cname(direct, &fullhost, newname)) { |
Damien Miller | 3850559 | 2013-10-17 11:48:13 +1100 | [diff] [blame] | 488 | debug("Canonicalized hostname \"%s\" => \"%s\"", |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 489 | *hostp, fullhost); |
| 490 | } |
| 491 | free(*hostp); |
| 492 | *hostp = fullhost; |
| 493 | return addrs; |
| 494 | } |
djm@openbsd.org | 5ee0063 | 2015-10-16 18:40:49 +0000 | [diff] [blame] | 495 | notfound: |
Damien Miller | 3850559 | 2013-10-17 11:48:13 +1100 | [diff] [blame] | 496 | if (!options.canonicalize_fallback_local) |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 497 | fatal("%s: Could not resolve host \"%s\"", __progname, *hostp); |
| 498 | debug2("%s: host %s not found in any suffix", __func__, *hostp); |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 499 | return NULL; |
| 500 | } |
| 501 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 502 | /* |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 503 | * Check the result of hostkey loading, ignoring some errors and |
| 504 | * fatal()ing for others. |
| 505 | */ |
| 506 | static void |
| 507 | check_load(int r, const char *path, const char *message) |
| 508 | { |
| 509 | switch (r) { |
| 510 | case 0: |
| 511 | break; |
| 512 | case SSH_ERR_INTERNAL_ERROR: |
| 513 | case SSH_ERR_ALLOC_FAIL: |
| 514 | fatal("load %s \"%s\": %s", message, path, ssh_err(r)); |
| 515 | case SSH_ERR_SYSTEM_ERROR: |
| 516 | /* Ignore missing files */ |
| 517 | if (errno == ENOENT) |
| 518 | break; |
| 519 | /* FALLTHROUGH */ |
| 520 | default: |
| 521 | error("load %s \"%s\": %s", message, path, ssh_err(r)); |
| 522 | break; |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | /* |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 527 | * Read per-user configuration file. Ignore the system wide config |
| 528 | * file if the user specifies a config file on the command line. |
| 529 | */ |
| 530 | static void |
djm@openbsd.org | 9e34e0c | 2018-11-23 05:08:07 +0000 | [diff] [blame] | 531 | process_config_files(const char *host_name, struct passwd *pw, int final_pass, |
| 532 | int *want_final_pass) |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 533 | { |
deraadt@openbsd.org | 087266e | 2015-01-20 23:14:00 +0000 | [diff] [blame] | 534 | char buf[PATH_MAX]; |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 535 | int r; |
| 536 | |
| 537 | if (config != NULL) { |
| 538 | if (strcasecmp(config, "none") != 0 && |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 539 | !read_config_file(config, pw, host, host_name, &options, |
djm@openbsd.org | 9e34e0c | 2018-11-23 05:08:07 +0000 | [diff] [blame] | 540 | SSHCONF_USERCONF | (final_pass ? SSHCONF_FINAL : 0), |
| 541 | want_final_pass)) |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 542 | fatal("Can't open user config file %.100s: " |
| 543 | "%.100s", config, strerror(errno)); |
| 544 | } else { |
| 545 | r = snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, |
| 546 | _PATH_SSH_USER_CONFFILE); |
| 547 | if (r > 0 && (size_t)r < sizeof(buf)) |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 548 | (void)read_config_file(buf, pw, host, host_name, |
djm@openbsd.org | 957fbce | 2014-10-08 22:20:25 +0000 | [diff] [blame] | 549 | &options, SSHCONF_CHECKPERM | SSHCONF_USERCONF | |
djm@openbsd.org | 9e34e0c | 2018-11-23 05:08:07 +0000 | [diff] [blame] | 550 | (final_pass ? SSHCONF_FINAL : 0), want_final_pass); |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 551 | |
| 552 | /* Read systemwide configuration file after user config. */ |
djm@openbsd.org | 957fbce | 2014-10-08 22:20:25 +0000 | [diff] [blame] | 553 | (void)read_config_file(_PATH_HOST_CONFIG_FILE, pw, |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 554 | host, host_name, &options, |
djm@openbsd.org | 9e34e0c | 2018-11-23 05:08:07 +0000 | [diff] [blame] | 555 | final_pass ? SSHCONF_FINAL : 0, want_final_pass); |
djm@openbsd.org | 957fbce | 2014-10-08 22:20:25 +0000 | [diff] [blame] | 556 | } |
| 557 | } |
| 558 | |
| 559 | /* Rewrite the port number in an addrinfo list of addresses */ |
| 560 | static void |
| 561 | set_addrinfo_port(struct addrinfo *addrs, int port) |
| 562 | { |
| 563 | struct addrinfo *addr; |
| 564 | |
| 565 | for (addr = addrs; addr != NULL; addr = addr->ai_next) { |
| 566 | switch (addr->ai_family) { |
| 567 | case AF_INET: |
| 568 | ((struct sockaddr_in *)addr->ai_addr)-> |
| 569 | sin_port = htons(port); |
| 570 | break; |
| 571 | case AF_INET6: |
| 572 | ((struct sockaddr_in6 *)addr->ai_addr)-> |
| 573 | sin6_port = htons(port); |
| 574 | break; |
| 575 | } |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 576 | } |
| 577 | } |
| 578 | |
| 579 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 580 | * Main program for the ssh client. |
| 581 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 582 | int |
| 583 | main(int ac, char **av) |
| 584 | { |
djm@openbsd.org | 9576726 | 2016-03-07 19:02:43 +0000 | [diff] [blame] | 585 | struct ssh *ssh = NULL; |
djm@openbsd.org | 643c2ad | 2017-08-12 06:46:01 +0000 | [diff] [blame] | 586 | int i, r, opt, exit_status, use_syslog, direct, timeout_ms; |
djm@openbsd.org | 9e34e0c | 2018-11-23 05:08:07 +0000 | [diff] [blame] | 587 | int was_addr, config_test = 0, opt_terminated = 0, want_final_pass = 0; |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 588 | char *p, *cp, *line, *argv0, buf[PATH_MAX], *logfile; |
| 589 | char cname[NI_MAXHOST]; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 590 | struct stat st; |
Ben Lindstrom | 086cf21 | 2001-03-05 05:56:40 +0000 | [diff] [blame] | 591 | struct passwd *pw; |
Ben Lindstrom | 5ccf63a | 2001-09-24 20:00:10 +0000 | [diff] [blame] | 592 | extern int optind, optreset; |
Damien Miller | 4f8e669 | 2001-07-14 13:22:53 +1000 | [diff] [blame] | 593 | extern char *optarg; |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 594 | struct Forward fwd; |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 595 | struct addrinfo *addrs = NULL; |
Damien Miller | 9c38643 | 2014-07-03 21:27:46 +1000 | [diff] [blame] | 596 | struct ssh_digest_ctx *md; |
| 597 | u_char conn_hash[SSH_DIGEST_MAX_LENGTH]; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 598 | |
Darren Tucker | ce321d8 | 2005-10-03 18:11:24 +1000 | [diff] [blame] | 599 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
| 600 | sanitise_stdfd(); |
| 601 | |
Damien Miller | 59d3d5b | 2003-08-22 09:34:41 +1000 | [diff] [blame] | 602 | __progname = ssh_get_progname(av[0]); |
Damien Miller | f9b625c | 2000-07-09 22:42:32 +1000 | [diff] [blame] | 603 | |
Damien Miller | ea2c1a4 | 2011-06-03 12:10:22 +1000 | [diff] [blame] | 604 | #ifndef HAVE_SETPROCTITLE |
| 605 | /* Prepare for later setproctitle emulation */ |
| 606 | /* Save argv so it isn't clobbered by setproctitle() emulation */ |
| 607 | saved_av = xcalloc(ac + 1, sizeof(*saved_av)); |
| 608 | for (i = 0; i < ac; i++) |
| 609 | saved_av[i] = xstrdup(av[i]); |
| 610 | saved_av[i] = NULL; |
| 611 | compat_init_setproctitle(ac, av); |
| 612 | av = saved_av; |
| 613 | #endif |
| 614 | |
Damien Miller | 42c5ec4 | 2018-11-23 10:40:06 +1100 | [diff] [blame] | 615 | seed_rng(); |
| 616 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 617 | /* |
Damien Miller | 00d9ae2 | 2010-08-17 01:59:31 +1000 | [diff] [blame] | 618 | * Discard other fds that are hanging around. These can cause problem |
| 619 | * with backgrounded ssh processes started by ControlPersist. |
| 620 | */ |
| 621 | closefrom(STDERR_FILENO + 1); |
| 622 | |
Ben Lindstrom | 3fcf1a2 | 2001-04-08 18:26:59 +0000 | [diff] [blame] | 623 | /* Get user data. */ |
dtucker@openbsd.org | e655ee0 | 2018-07-27 05:34:42 +0000 | [diff] [blame] | 624 | pw = getpwuid(getuid()); |
Ben Lindstrom | 3fcf1a2 | 2001-04-08 18:26:59 +0000 | [diff] [blame] | 625 | if (!pw) { |
dtucker@openbsd.org | e655ee0 | 2018-07-27 05:34:42 +0000 | [diff] [blame] | 626 | logit("No user exists for uid %lu", (u_long)getuid()); |
Darren Tucker | e9a9b71 | 2005-12-20 16:15:51 +1100 | [diff] [blame] | 627 | exit(255); |
Ben Lindstrom | 3fcf1a2 | 2001-04-08 18:26:59 +0000 | [diff] [blame] | 628 | } |
| 629 | /* Take a copy of the returned structure. */ |
| 630 | pw = pwcopy(pw); |
| 631 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 632 | /* |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 633 | * Set our umask to something reasonable, as some files are created |
| 634 | * with the default umask. This will make them world-readable but |
| 635 | * writable only by the owner, which is ok for all files for which we |
| 636 | * don't set the modes explicitly. |
| 637 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 638 | umask(022); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 639 | |
Damien Miller | dda78a0 | 2016-12-12 13:57:10 +1100 | [diff] [blame] | 640 | msetlocale(); |
djm@openbsd.org | 65c6c6b | 2016-07-17 04:20:16 +0000 | [diff] [blame] | 641 | |
Darren Tucker | d6173c0 | 2008-06-13 04:52:53 +1000 | [diff] [blame] | 642 | /* |
| 643 | * Initialize option structure to indicate that no values have been |
| 644 | * set. |
| 645 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 646 | initialize_options(&options); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 647 | |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 648 | /* |
| 649 | * Prepare main ssh transport/connection structures |
| 650 | */ |
| 651 | if ((ssh = ssh_alloc_session_state()) == NULL) |
| 652 | fatal("Couldn't allocate session state"); |
| 653 | channel_init_channels(ssh); |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 654 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 655 | /* Parse command-line arguments. */ |
| 656 | host = NULL; |
Damien Miller | e272a5b | 2008-11-03 19:22:37 +1100 | [diff] [blame] | 657 | use_syslog = 0; |
Damien Miller | 03d4d7e | 2013-04-23 15:21:06 +1000 | [diff] [blame] | 658 | logfile = NULL; |
Darren Tucker | 72efd74 | 2009-06-21 17:48:00 +1000 | [diff] [blame] | 659 | argv0 = av[0]; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 660 | |
Damien Miller | 2ecb6bd | 2006-03-15 12:03:53 +1100 | [diff] [blame] | 661 | again: |
Darren Tucker | d6173c0 | 2008-06-13 04:52:53 +1000 | [diff] [blame] | 662 | while ((opt = getopt(ac, av, "1246ab:c:e:fgi:kl:m:no:p:qstvx" |
djm@openbsd.org | ac2e302 | 2018-02-23 02:34:33 +0000 | [diff] [blame] | 663 | "AB:CD:E:F:GI:J:KL:MNO:PQ:R:S:TVw:W:XYy")) != -1) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 664 | switch (opt) { |
Ben Lindstrom | 1e7d306 | 2001-02-09 02:36:43 +0000 | [diff] [blame] | 665 | case '1': |
djm@openbsd.org | 99f95ba | 2017-04-30 23:11:45 +0000 | [diff] [blame] | 666 | fatal("SSH protocol v.1 is no longer supported"); |
Ben Lindstrom | 1e7d306 | 2001-02-09 02:36:43 +0000 | [diff] [blame] | 667 | break; |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 668 | case '2': |
djm@openbsd.org | 99f95ba | 2017-04-30 23:11:45 +0000 | [diff] [blame] | 669 | /* Ignored */ |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 670 | break; |
Damien Miller | 34132e5 | 2000-01-14 15:45:46 +1100 | [diff] [blame] | 671 | case '4': |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 672 | options.address_family = AF_INET; |
Damien Miller | 34132e5 | 2000-01-14 15:45:46 +1100 | [diff] [blame] | 673 | break; |
Damien Miller | 34132e5 | 2000-01-14 15:45:46 +1100 | [diff] [blame] | 674 | case '6': |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 675 | options.address_family = AF_INET6; |
Damien Miller | 34132e5 | 2000-01-14 15:45:46 +1100 | [diff] [blame] | 676 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 677 | case 'n': |
| 678 | stdin_null_flag = 1; |
| 679 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 680 | case 'f': |
| 681 | fork_after_authentication_flag = 1; |
| 682 | stdin_null_flag = 1; |
| 683 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 684 | case 'x': |
| 685 | options.forward_x11 = 0; |
| 686 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 687 | case 'X': |
| 688 | options.forward_x11 = 1; |
| 689 | break; |
Damien Miller | e272a5b | 2008-11-03 19:22:37 +1100 | [diff] [blame] | 690 | case 'y': |
| 691 | use_syslog = 1; |
| 692 | break; |
Damien Miller | 03d4d7e | 2013-04-23 15:21:06 +1000 | [diff] [blame] | 693 | case 'E': |
dtucker@openbsd.org | 4f7cc2f | 2015-09-04 08:21:47 +0000 | [diff] [blame] | 694 | logfile = optarg; |
Damien Miller | 03d4d7e | 2013-04-23 15:21:06 +1000 | [diff] [blame] | 695 | break; |
djm@openbsd.org | 957fbce | 2014-10-08 22:20:25 +0000 | [diff] [blame] | 696 | case 'G': |
| 697 | config_test = 1; |
| 698 | break; |
Darren Tucker | 0a118da | 2003-10-15 15:54:32 +1000 | [diff] [blame] | 699 | case 'Y': |
| 700 | options.forward_x11 = 1; |
| 701 | options.forward_x11_trusted = 1; |
| 702 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 703 | case 'g': |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 704 | options.fwd_opts.gateway_ports = 1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 705 | break; |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 706 | case 'O': |
dtucker@openbsd.org | 8543ff3 | 2016-06-03 03:14:41 +0000 | [diff] [blame] | 707 | if (options.stdio_forward_host != NULL) |
Damien Miller | e1537f9 | 2010-01-26 13:26:22 +1100 | [diff] [blame] | 708 | fatal("Cannot specify multiplexing " |
| 709 | "command with -W"); |
| 710 | else if (muxclient_command != 0) |
| 711 | fatal("Multiplexing command already specified"); |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 712 | if (strcmp(optarg, "check") == 0) |
Damien Miller | b1cbfa2 | 2008-05-19 16:00:08 +1000 | [diff] [blame] | 713 | muxclient_command = SSHMUX_COMMAND_ALIVE_CHECK; |
Damien Miller | 388f6fc | 2010-05-21 14:57:35 +1000 | [diff] [blame] | 714 | else if (strcmp(optarg, "forward") == 0) |
| 715 | muxclient_command = SSHMUX_COMMAND_FORWARD; |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 716 | else if (strcmp(optarg, "exit") == 0) |
Damien Miller | b1cbfa2 | 2008-05-19 16:00:08 +1000 | [diff] [blame] | 717 | muxclient_command = SSHMUX_COMMAND_TERMINATE; |
Damien Miller | 6c3eec7 | 2011-05-05 14:16:22 +1000 | [diff] [blame] | 718 | else if (strcmp(optarg, "stop") == 0) |
| 719 | muxclient_command = SSHMUX_COMMAND_STOP; |
Damien Miller | f6dff7c | 2011-09-22 21:38:52 +1000 | [diff] [blame] | 720 | else if (strcmp(optarg, "cancel") == 0) |
| 721 | muxclient_command = SSHMUX_COMMAND_CANCEL_FWD; |
markus@openbsd.org | 8d05784 | 2016-09-30 09:19:13 +0000 | [diff] [blame] | 722 | else if (strcmp(optarg, "proxy") == 0) |
| 723 | muxclient_command = SSHMUX_COMMAND_PROXY; |
Darren Tucker | 7ebfc10 | 2004-11-07 20:06:19 +1100 | [diff] [blame] | 724 | else |
| 725 | fatal("Invalid multiplex command."); |
| 726 | break; |
Damien Miller | 147bba3 | 2002-09-04 16:46:06 +1000 | [diff] [blame] | 727 | case 'P': /* deprecated */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 728 | break; |
Damien Miller | d937dc0 | 2013-12-05 10:19:54 +1100 | [diff] [blame] | 729 | case 'Q': |
Damien Miller | ea11119 | 2013-04-23 19:24:32 +1000 | [diff] [blame] | 730 | cp = NULL; |
Damien Miller | d937dc0 | 2013-12-05 10:19:54 +1100 | [diff] [blame] | 731 | if (strcmp(optarg, "cipher") == 0) |
Damien Miller | 0fde8ac | 2013-11-21 14:12:23 +1100 | [diff] [blame] | 732 | cp = cipher_alg_list('\n', 0); |
Damien Miller | d937dc0 | 2013-12-05 10:19:54 +1100 | [diff] [blame] | 733 | else if (strcmp(optarg, "cipher-auth") == 0) |
Damien Miller | 0fde8ac | 2013-11-21 14:12:23 +1100 | [diff] [blame] | 734 | cp = cipher_alg_list('\n', 1); |
Damien Miller | d937dc0 | 2013-12-05 10:19:54 +1100 | [diff] [blame] | 735 | else if (strcmp(optarg, "mac") == 0) |
Damien Miller | 690d989 | 2013-11-08 12:16:49 +1100 | [diff] [blame] | 736 | cp = mac_alg_list('\n'); |
Damien Miller | d937dc0 | 2013-12-05 10:19:54 +1100 | [diff] [blame] | 737 | else if (strcmp(optarg, "kex") == 0) |
Damien Miller | 690d989 | 2013-11-08 12:16:49 +1100 | [diff] [blame] | 738 | cp = kex_alg_list('\n'); |
Damien Miller | d937dc0 | 2013-12-05 10:19:54 +1100 | [diff] [blame] | 739 | else if (strcmp(optarg, "key") == 0) |
djm@openbsd.org | 183ba55 | 2017-03-10 04:07:20 +0000 | [diff] [blame] | 740 | cp = sshkey_alg_list(0, 0, 0, '\n'); |
Damien Miller | 5be9d9e | 2013-12-07 11:24:01 +1100 | [diff] [blame] | 741 | else if (strcmp(optarg, "key-cert") == 0) |
djm@openbsd.org | 183ba55 | 2017-03-10 04:07:20 +0000 | [diff] [blame] | 742 | cp = sshkey_alg_list(1, 0, 0, '\n'); |
Damien Miller | 5be9d9e | 2013-12-07 11:24:01 +1100 | [diff] [blame] | 743 | else if (strcmp(optarg, "key-plain") == 0) |
djm@openbsd.org | 183ba55 | 2017-03-10 04:07:20 +0000 | [diff] [blame] | 744 | cp = sshkey_alg_list(0, 1, 0, '\n'); |
djm@openbsd.org | 357128a | 2018-09-12 01:30:10 +0000 | [diff] [blame] | 745 | else if (strcmp(optarg, "sig") == 0) |
djm@openbsd.org | aa083aa | 2018-09-20 03:31:49 +0000 | [diff] [blame] | 746 | cp = sshkey_alg_list(0, 1, 1, '\n'); |
djm@openbsd.org | 357128a | 2018-09-12 01:30:10 +0000 | [diff] [blame] | 747 | else if (strcmp(optarg, "protocol-version") == 0) |
djm@openbsd.org | 68d2dfc | 2015-03-03 06:48:58 +0000 | [diff] [blame] | 748 | cp = xstrdup("2"); |
djm@openbsd.org | 357128a | 2018-09-12 01:30:10 +0000 | [diff] [blame] | 749 | else if (strcmp(optarg, "help") == 0) { |
| 750 | cp = xstrdup( |
| 751 | "cipher\ncipher-auth\nkex\nkey\n" |
| 752 | "key-cert\nkey-plain\nmac\n" |
| 753 | "protocol-version\nsig"); |
djm@openbsd.org | 68d2dfc | 2015-03-03 06:48:58 +0000 | [diff] [blame] | 754 | } |
Damien Miller | ea11119 | 2013-04-23 19:24:32 +1000 | [diff] [blame] | 755 | if (cp == NULL) |
| 756 | fatal("Unsupported query \"%s\"", optarg); |
| 757 | printf("%s\n", cp); |
| 758 | free(cp); |
| 759 | exit(0); |
| 760 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 761 | case 'a': |
| 762 | options.forward_agent = 0; |
| 763 | break; |
Damien Miller | b1715dc | 2000-05-30 13:44:51 +1000 | [diff] [blame] | 764 | case 'A': |
| 765 | options.forward_agent = 1; |
| 766 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 767 | case 'k': |
Damien Miller | e0113cc | 2003-11-24 13:10:09 +1100 | [diff] [blame] | 768 | options.gss_deleg_creds = 0; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 769 | break; |
Darren Tucker | 415bddc | 2007-06-12 23:43:16 +1000 | [diff] [blame] | 770 | case 'K': |
| 771 | options.gss_authentication = 1; |
| 772 | options.gss_deleg_creds = 1; |
| 773 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 774 | case 'i': |
dtucker@openbsd.org | e655ee0 | 2018-07-27 05:34:42 +0000 | [diff] [blame] | 775 | p = tilde_expand_filename(optarg, getuid()); |
deraadt@openbsd.org | 4d28fa7 | 2019-06-28 13:35:04 +0000 | [diff] [blame] | 776 | if (stat(p, &st) == -1) |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 777 | fprintf(stderr, "Warning: Identity file %s " |
dtucker@openbsd.org | 03239c1 | 2015-10-25 23:42:00 +0000 | [diff] [blame] | 778 | "not accessible: %s.\n", p, |
Damien Miller | 3eb48b6 | 2005-03-01 21:15:46 +1100 | [diff] [blame] | 779 | strerror(errno)); |
dtucker@openbsd.org | 03239c1 | 2015-10-25 23:42:00 +0000 | [diff] [blame] | 780 | else |
| 781 | add_identity_file(&options, NULL, p, 1); |
| 782 | free(p); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 783 | break; |
Ben Lindstrom | c5b6800 | 2001-07-04 04:52:03 +0000 | [diff] [blame] | 784 | case 'I': |
Damien Miller | 7ea845e | 2010-02-12 09:21:02 +1100 | [diff] [blame] | 785 | #ifdef ENABLE_PKCS11 |
dtucker@openbsd.org | 4f7cc2f | 2015-09-04 08:21:47 +0000 | [diff] [blame] | 786 | free(options.pkcs11_provider); |
Damien Miller | 7ea845e | 2010-02-12 09:21:02 +1100 | [diff] [blame] | 787 | options.pkcs11_provider = xstrdup(optarg); |
Ben Lindstrom | bcc1808 | 2001-08-06 21:59:25 +0000 | [diff] [blame] | 788 | #else |
Damien Miller | 7ea845e | 2010-02-12 09:21:02 +1100 | [diff] [blame] | 789 | fprintf(stderr, "no support for PKCS#11.\n"); |
Ben Lindstrom | bcc1808 | 2001-08-06 21:59:25 +0000 | [diff] [blame] | 790 | #endif |
Ben Lindstrom | c5b6800 | 2001-07-04 04:52:03 +0000 | [diff] [blame] | 791 | break; |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 792 | case 'J': |
djm@openbsd.org | cb8f565 | 2019-06-14 04:13:58 +0000 | [diff] [blame] | 793 | if (options.jump_host != NULL) { |
| 794 | fatal("Only a single -J option is permitted " |
| 795 | "(use commas to separate multiple " |
| 796 | "jump hops)"); |
| 797 | } |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 798 | if (options.proxy_command != NULL) |
| 799 | fatal("Cannot specify -J with ProxyCommand"); |
| 800 | if (parse_jump(optarg, &options, 1) == -1) |
| 801 | fatal("Invalid -J argument"); |
| 802 | options.proxy_command = xstrdup("none"); |
| 803 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 804 | case 't': |
Damien Miller | 21771e2 | 2011-05-15 08:45:50 +1000 | [diff] [blame] | 805 | if (options.request_tty == REQUEST_TTY_YES) |
| 806 | options.request_tty = REQUEST_TTY_FORCE; |
| 807 | else |
| 808 | options.request_tty = REQUEST_TTY_YES; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 809 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 810 | case 'v': |
Darren Tucker | e98dfa3 | 2003-07-19 19:54:31 +1000 | [diff] [blame] | 811 | if (debug_flag == 0) { |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 812 | debug_flag = 1; |
| 813 | options.log_level = SYSLOG_LEVEL_DEBUG1; |
Darren Tucker | e98dfa3 | 2003-07-19 19:54:31 +1000 | [diff] [blame] | 814 | } else { |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 815 | if (options.log_level < SYSLOG_LEVEL_DEBUG3) { |
| 816 | debug_flag++; |
Darren Tucker | e98dfa3 | 2003-07-19 19:54:31 +1000 | [diff] [blame] | 817 | options.log_level++; |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 818 | } |
Darren Tucker | e98dfa3 | 2003-07-19 19:54:31 +1000 | [diff] [blame] | 819 | } |
Damien Miller | 03d4d7e | 2013-04-23 15:21:06 +1000 | [diff] [blame] | 820 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 821 | case 'V': |
Damien Miller | 0c889cd | 2004-03-22 09:36:00 +1100 | [diff] [blame] | 822 | fprintf(stderr, "%s, %s\n", |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 823 | SSH_RELEASE, |
| 824 | #ifdef WITH_OPENSSL |
djm@openbsd.org | a65784c | 2018-10-23 05:56:35 +0000 | [diff] [blame] | 825 | OpenSSL_version(OPENSSL_VERSION) |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 826 | #else |
| 827 | "without OpenSSL" |
| 828 | #endif |
| 829 | ); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 830 | if (opt == 'V') |
| 831 | exit(0); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 832 | break; |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 833 | case 'w': |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 834 | if (options.tun_open == -1) |
| 835 | options.tun_open = SSH_TUNMODE_DEFAULT; |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 836 | options.tun_local = a2tun(optarg, &options.tun_remote); |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 837 | if (options.tun_local == SSH_TUNID_ERR) { |
Darren Tucker | d6173c0 | 2008-06-13 04:52:53 +1000 | [diff] [blame] | 838 | fprintf(stderr, |
| 839 | "Bad tun device '%s'\n", optarg); |
Darren Tucker | e9a9b71 | 2005-12-20 16:15:51 +1100 | [diff] [blame] | 840 | exit(255); |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 841 | } |
| 842 | break; |
Darren Tucker | 7ad8dd2 | 2010-01-12 19:40:27 +1100 | [diff] [blame] | 843 | case 'W': |
dtucker@openbsd.org | 8543ff3 | 2016-06-03 03:14:41 +0000 | [diff] [blame] | 844 | if (options.stdio_forward_host != NULL) |
Damien Miller | e1537f9 | 2010-01-26 13:26:22 +1100 | [diff] [blame] | 845 | fatal("stdio forward already specified"); |
| 846 | if (muxclient_command != 0) |
| 847 | fatal("Cannot specify stdio forward with -O"); |
Darren Tucker | 7ad8dd2 | 2010-01-12 19:40:27 +1100 | [diff] [blame] | 848 | if (parse_forward(&fwd, optarg, 1, 0)) { |
dtucker@openbsd.org | 8543ff3 | 2016-06-03 03:14:41 +0000 | [diff] [blame] | 849 | options.stdio_forward_host = fwd.listen_host; |
| 850 | options.stdio_forward_port = fwd.listen_port; |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 851 | free(fwd.connect_host); |
Darren Tucker | 7ad8dd2 | 2010-01-12 19:40:27 +1100 | [diff] [blame] | 852 | } else { |
| 853 | fprintf(stderr, |
| 854 | "Bad stdio forwarding specification '%s'\n", |
| 855 | optarg); |
| 856 | exit(255); |
| 857 | } |
Damien Miller | 21771e2 | 2011-05-15 08:45:50 +1000 | [diff] [blame] | 858 | options.request_tty = REQUEST_TTY_NO; |
Darren Tucker | 7ad8dd2 | 2010-01-12 19:40:27 +1100 | [diff] [blame] | 859 | no_shell_flag = 1; |
Darren Tucker | 7ad8dd2 | 2010-01-12 19:40:27 +1100 | [diff] [blame] | 860 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 861 | case 'q': |
| 862 | options.log_level = SYSLOG_LEVEL_QUIET; |
| 863 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 864 | case 'e': |
| 865 | if (optarg[0] == '^' && optarg[2] == 0 && |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 866 | (u_char) optarg[1] >= 64 && |
| 867 | (u_char) optarg[1] < 128) |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 868 | options.escape_char = (u_char) optarg[1] & 31; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 869 | else if (strlen(optarg) == 1) |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 870 | options.escape_char = (u_char) optarg[0]; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 871 | else if (strcmp(optarg, "none") == 0) |
Ben Lindstrom | 2b1f71b | 2001-06-05 20:32:21 +0000 | [diff] [blame] | 872 | options.escape_char = SSH_ESCAPECHAR_NONE; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 873 | else { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 874 | fprintf(stderr, "Bad escape character '%s'.\n", |
| 875 | optarg); |
Darren Tucker | e9a9b71 | 2005-12-20 16:15:51 +1100 | [diff] [blame] | 876 | exit(255); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 877 | } |
| 878 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 879 | case 'c': |
naddy@openbsd.org | 91a2135 | 2019-09-06 14:45:34 +0000 | [diff] [blame] | 880 | if (!ciphers_valid(*optarg == '+' || *optarg == '^' ? |
djm@openbsd.org | f9eca24 | 2015-07-30 00:01:34 +0000 | [diff] [blame] | 881 | optarg + 1 : optarg)) { |
djm@openbsd.org | f9eca24 | 2015-07-30 00:01:34 +0000 | [diff] [blame] | 882 | fprintf(stderr, "Unknown cipher type '%s'\n", |
| 883 | optarg); |
| 884 | exit(255); |
| 885 | } |
djm@openbsd.org | cdccebd | 2017-04-30 23:15:04 +0000 | [diff] [blame] | 886 | free(options.ciphers); |
| 887 | options.ciphers = xstrdup(optarg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 888 | break; |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 889 | case 'm': |
dtucker@openbsd.org | 4f7cc2f | 2015-09-04 08:21:47 +0000 | [diff] [blame] | 890 | if (mac_valid(optarg)) { |
| 891 | free(options.macs); |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 892 | options.macs = xstrdup(optarg); |
dtucker@openbsd.org | 4f7cc2f | 2015-09-04 08:21:47 +0000 | [diff] [blame] | 893 | } else { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 894 | fprintf(stderr, "Unknown mac type '%s'\n", |
| 895 | optarg); |
Darren Tucker | e9a9b71 | 2005-12-20 16:15:51 +1100 | [diff] [blame] | 896 | exit(255); |
Ben Lindstrom | 06b33aa | 2001-02-15 03:01:59 +0000 | [diff] [blame] | 897 | } |
| 898 | break; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 899 | case 'M': |
Damien Miller | d14b1e7 | 2005-06-16 13:19:41 +1000 | [diff] [blame] | 900 | if (options.control_master == SSHCTL_MASTER_YES) |
| 901 | options.control_master = SSHCTL_MASTER_ASK; |
| 902 | else |
| 903 | options.control_master = SSHCTL_MASTER_YES; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 904 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 905 | case 'p': |
millert@openbsd.org | 887669e | 2017-10-21 23:06:24 +0000 | [diff] [blame] | 906 | if (options.port == -1) { |
| 907 | options.port = a2port(optarg); |
| 908 | if (options.port <= 0) { |
| 909 | fprintf(stderr, "Bad port '%s'\n", |
| 910 | optarg); |
| 911 | exit(255); |
| 912 | } |
Ben Lindstrom | 146edb9 | 2001-04-11 23:06:28 +0000 | [diff] [blame] | 913 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 914 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 915 | case 'l': |
millert@openbsd.org | 887669e | 2017-10-21 23:06:24 +0000 | [diff] [blame] | 916 | if (options.user == NULL) |
| 917 | options.user = optarg; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 918 | break; |
Ben Lindstrom | 1a17471 | 2001-09-12 17:56:15 +0000 | [diff] [blame] | 919 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 920 | case 'L': |
Damien Miller | 4bf648f | 2009-02-14 16:28:21 +1100 | [diff] [blame] | 921 | if (parse_forward(&fwd, optarg, 0, 0)) |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 922 | add_local_forward(&options, &fwd); |
| 923 | else { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 924 | fprintf(stderr, |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 925 | "Bad local forwarding specification '%s'\n", |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 926 | optarg); |
Darren Tucker | e9a9b71 | 2005-12-20 16:15:51 +1100 | [diff] [blame] | 927 | exit(255); |
Ben Lindstrom | 1a17471 | 2001-09-12 17:56:15 +0000 | [diff] [blame] | 928 | } |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 929 | break; |
| 930 | |
| 931 | case 'R': |
markus@openbsd.org | 609d7a6 | 2017-09-21 19:16:53 +0000 | [diff] [blame] | 932 | if (parse_forward(&fwd, optarg, 0, 1) || |
| 933 | parse_forward(&fwd, optarg, 1, 1)) { |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 934 | add_remote_forward(&options, &fwd); |
| 935 | } else { |
| 936 | fprintf(stderr, |
| 937 | "Bad remote forwarding specification " |
| 938 | "'%s'\n", optarg); |
Darren Tucker | e9a9b71 | 2005-12-20 16:15:51 +1100 | [diff] [blame] | 939 | exit(255); |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 940 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 941 | break; |
Ben Lindstrom | 3bb4f9d | 2001-04-08 18:30:26 +0000 | [diff] [blame] | 942 | |
| 943 | case 'D': |
Damien Miller | 4bf648f | 2009-02-14 16:28:21 +1100 | [diff] [blame] | 944 | if (parse_forward(&fwd, optarg, 1, 0)) { |
Damien Miller | a699d95 | 2008-11-03 19:27:34 +1100 | [diff] [blame] | 945 | add_local_forward(&options, &fwd); |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 946 | } else { |
Damien Miller | a699d95 | 2008-11-03 19:27:34 +1100 | [diff] [blame] | 947 | fprintf(stderr, |
| 948 | "Bad dynamic forwarding specification " |
| 949 | "'%s'\n", optarg); |
Darren Tucker | e9a9b71 | 2005-12-20 16:15:51 +1100 | [diff] [blame] | 950 | exit(255); |
Ben Lindstrom | 146edb9 | 2001-04-11 23:06:28 +0000 | [diff] [blame] | 951 | } |
Ben Lindstrom | 3bb4f9d | 2001-04-08 18:30:26 +0000 | [diff] [blame] | 952 | break; |
| 953 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 954 | case 'C': |
| 955 | options.compression = 1; |
| 956 | break; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 957 | case 'N': |
| 958 | no_shell_flag = 1; |
Damien Miller | 21771e2 | 2011-05-15 08:45:50 +1000 | [diff] [blame] | 959 | options.request_tty = REQUEST_TTY_NO; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 960 | break; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 961 | case 'T': |
Damien Miller | 21771e2 | 2011-05-15 08:45:50 +1000 | [diff] [blame] | 962 | options.request_tty = REQUEST_TTY_NO; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 963 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 964 | case 'o': |
Damien Miller | 9836cf8 | 2003-12-17 16:30:06 +1100 | [diff] [blame] | 965 | line = xstrdup(optarg); |
djm@openbsd.org | 957fbce | 2014-10-08 22:20:25 +0000 | [diff] [blame] | 966 | if (process_config_line(&options, pw, |
| 967 | host ? host : "", host ? host : "", line, |
| 968 | "command-line", 0, NULL, SSHCONF_USERCONF) != 0) |
Darren Tucker | e9a9b71 | 2005-12-20 16:15:51 +1100 | [diff] [blame] | 969 | exit(255); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 970 | free(line); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 971 | break; |
Damien Miller | 832562e | 2001-01-30 09:30:01 +1100 | [diff] [blame] | 972 | case 's': |
| 973 | subsystem_flag = 1; |
| 974 | break; |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 975 | case 'S': |
mmcc@openbsd.org | d59ce08 | 2015-12-10 17:08:40 +0000 | [diff] [blame] | 976 | free(options.control_path); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 977 | options.control_path = xstrdup(optarg); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 978 | break; |
Ben Lindstrom | e0f8804 | 2001-04-30 13:06:24 +0000 | [diff] [blame] | 979 | case 'b': |
| 980 | options.bind_address = optarg; |
| 981 | break; |
djm@openbsd.org | ac2e302 | 2018-02-23 02:34:33 +0000 | [diff] [blame] | 982 | case 'B': |
| 983 | options.bind_interface = optarg; |
| 984 | break; |
Ben Lindstrom | 14f31ab | 2001-09-12 17:48:04 +0000 | [diff] [blame] | 985 | case 'F': |
| 986 | config = optarg; |
| 987 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 988 | default: |
| 989 | usage(); |
| 990 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 991 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 992 | |
djm@openbsd.org | 643c2ad | 2017-08-12 06:46:01 +0000 | [diff] [blame] | 993 | if (optind > 1 && strcmp(av[optind - 1], "--") == 0) |
| 994 | opt_terminated = 1; |
| 995 | |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 996 | ac -= optind; |
| 997 | av += optind; |
| 998 | |
Darren Tucker | b8c884a | 2010-01-08 18:53:43 +1100 | [diff] [blame] | 999 | if (ac > 0 && !host) { |
millert@openbsd.org | 887669e | 2017-10-21 23:06:24 +0000 | [diff] [blame] | 1000 | int tport; |
| 1001 | char *tuser; |
| 1002 | switch (parse_ssh_uri(*av, &tuser, &host, &tport)) { |
| 1003 | case -1: |
| 1004 | usage(); |
| 1005 | break; |
| 1006 | case 0: |
| 1007 | if (options.user == NULL) { |
| 1008 | options.user = tuser; |
| 1009 | tuser = NULL; |
| 1010 | } |
| 1011 | free(tuser); |
| 1012 | if (options.port == -1 && tport != -1) |
| 1013 | options.port = tport; |
| 1014 | break; |
| 1015 | default: |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 1016 | p = xstrdup(*av); |
Ben Lindstrom | c276c12 | 2002-12-23 02:14:51 +0000 | [diff] [blame] | 1017 | cp = strrchr(p, '@'); |
millert@openbsd.org | 887669e | 2017-10-21 23:06:24 +0000 | [diff] [blame] | 1018 | if (cp != NULL) { |
| 1019 | if (cp == p) |
| 1020 | usage(); |
| 1021 | if (options.user == NULL) { |
| 1022 | options.user = p; |
| 1023 | p = NULL; |
| 1024 | } |
| 1025 | *cp++ = '\0'; |
| 1026 | host = xstrdup(cp); |
| 1027 | free(p); |
| 1028 | } else |
| 1029 | host = p; |
| 1030 | break; |
| 1031 | } |
djm@openbsd.org | 643c2ad | 2017-08-12 06:46:01 +0000 | [diff] [blame] | 1032 | if (ac > 1 && !opt_terminated) { |
Ben Lindstrom | b9fa691 | 2002-12-23 02:24:54 +0000 | [diff] [blame] | 1033 | optind = optreset = 1; |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 1034 | goto again; |
| 1035 | } |
Ben Lindstrom | b9fa691 | 2002-12-23 02:24:54 +0000 | [diff] [blame] | 1036 | ac--, av++; |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 1037 | } |
| 1038 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1039 | /* Check that we got a host name. */ |
| 1040 | if (!host) |
| 1041 | usage(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1042 | |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 1043 | host_arg = xstrdup(host); |
| 1044 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1045 | /* Initialize the command to execute on remote host. */ |
markus@openbsd.org | cecee2d | 2018-07-09 21:03:30 +0000 | [diff] [blame] | 1046 | if ((command = sshbuf_new()) == NULL) |
| 1047 | fatal("sshbuf_new failed"); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1048 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1049 | /* |
| 1050 | * Save the command to execute on the remote host in a buffer. There |
| 1051 | * is no limit on the length of the command, except by the maximum |
| 1052 | * packet size. Also sets the tty flag if there is no command. |
| 1053 | */ |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 1054 | if (!ac) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1055 | /* No command specified - execute shell on a tty. */ |
Damien Miller | 832562e | 2001-01-30 09:30:01 +1100 | [diff] [blame] | 1056 | if (subsystem_flag) { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 1057 | fprintf(stderr, |
| 1058 | "You must specify a subsystem to invoke.\n"); |
Damien Miller | 832562e | 2001-01-30 09:30:01 +1100 | [diff] [blame] | 1059 | usage(); |
| 1060 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1061 | } else { |
Damien Miller | f461445 | 2001-07-14 12:18:10 +1000 | [diff] [blame] | 1062 | /* A command has been specified. Store it into the buffer. */ |
| 1063 | for (i = 0; i < ac; i++) { |
markus@openbsd.org | cecee2d | 2018-07-09 21:03:30 +0000 | [diff] [blame] | 1064 | if ((r = sshbuf_putf(command, "%s%s", |
| 1065 | i ? " " : "", av[i])) != 0) |
| 1066 | fatal("%s: buffer error: %s", |
| 1067 | __func__, ssh_err(r)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1068 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1069 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1070 | |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 1071 | /* |
| 1072 | * Initialize "log" output. Since we are the client all output |
Damien Miller | 03d4d7e | 2013-04-23 15:21:06 +1000 | [diff] [blame] | 1073 | * goes to stderr unless otherwise specified by -y or -E. |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 1074 | */ |
Damien Miller | 03d4d7e | 2013-04-23 15:21:06 +1000 | [diff] [blame] | 1075 | if (use_syslog && logfile != NULL) |
| 1076 | fatal("Can't specify both -y and -E"); |
dtucker@openbsd.org | 4f7cc2f | 2015-09-04 08:21:47 +0000 | [diff] [blame] | 1077 | if (logfile != NULL) |
Damien Miller | 03d4d7e | 2013-04-23 15:21:06 +1000 | [diff] [blame] | 1078 | log_redirect_stderr_to(logfile); |
Darren Tucker | 72efd74 | 2009-06-21 17:48:00 +1000 | [diff] [blame] | 1079 | log_init(argv0, |
djm@openbsd.org@openbsd.org | dbe0662 | 2017-10-27 01:57:06 +0000 | [diff] [blame] | 1080 | options.log_level == SYSLOG_LEVEL_NOT_SET ? |
dtucker@openbsd.org | 68d3a2a | 2017-04-28 03:20:27 +0000 | [diff] [blame] | 1081 | SYSLOG_LEVEL_INFO : options.log_level, |
djm@openbsd.org@openbsd.org | dbe0662 | 2017-10-27 01:57:06 +0000 | [diff] [blame] | 1082 | options.log_facility == SYSLOG_FACILITY_NOT_SET ? |
dtucker@openbsd.org | 68d3a2a | 2017-04-28 03:20:27 +0000 | [diff] [blame] | 1083 | SYSLOG_FACILITY_USER : options.log_facility, |
| 1084 | !use_syslog); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1085 | |
Damien Miller | 03d4d7e | 2013-04-23 15:21:06 +1000 | [diff] [blame] | 1086 | if (debug_flag) |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 1087 | logit("%s, %s", SSH_RELEASE, |
| 1088 | #ifdef WITH_OPENSSL |
djm@openbsd.org | a65784c | 2018-10-23 05:56:35 +0000 | [diff] [blame] | 1089 | OpenSSL_version(OPENSSL_VERSION) |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 1090 | #else |
| 1091 | "without OpenSSL" |
| 1092 | #endif |
| 1093 | ); |
Damien Miller | 03d4d7e | 2013-04-23 15:21:06 +1000 | [diff] [blame] | 1094 | |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 1095 | /* Parse the configuration files */ |
djm@openbsd.org | 9e34e0c | 2018-11-23 05:08:07 +0000 | [diff] [blame] | 1096 | process_config_files(host_arg, pw, 0, &want_final_pass); |
| 1097 | if (want_final_pass) |
| 1098 | debug("configuration requests final Match pass"); |
Ben Lindstrom | 83f07d1 | 2001-10-03 17:22:29 +0000 | [diff] [blame] | 1099 | |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 1100 | /* Hostname canonicalisation needs a few options filled. */ |
| 1101 | fill_default_options_for_canonicalization(&options); |
| 1102 | |
| 1103 | /* If the user has replaced the hostname then take it into use now */ |
| 1104 | if (options.hostname != NULL) { |
| 1105 | /* NB. Please keep in sync with readconf.c:match_cfg_line() */ |
| 1106 | cp = percent_expand(options.hostname, |
| 1107 | "h", host, (char *)NULL); |
| 1108 | free(host); |
| 1109 | host = cp; |
djm@openbsd.org | 957fbce | 2014-10-08 22:20:25 +0000 | [diff] [blame] | 1110 | free(options.hostname); |
| 1111 | options.hostname = xstrdup(host); |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 1112 | } |
| 1113 | |
djm@openbsd.org | fc21ea9 | 2018-01-23 05:06:25 +0000 | [diff] [blame] | 1114 | /* Don't lowercase addresses, they will be explicitly canonicalised */ |
| 1115 | if ((was_addr = is_addr(host)) == 0) |
| 1116 | lowercase(host); |
| 1117 | |
| 1118 | /* |
| 1119 | * Try to canonicalize if requested by configuration or the |
| 1120 | * hostname is an address. |
| 1121 | */ |
| 1122 | if (options.canonicalize_hostname != SSH_CANONICALISE_NO || was_addr) |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 1123 | addrs = resolve_canonicalize(&host, options.port); |
| 1124 | |
| 1125 | /* |
Damien Miller | 08b57c6 | 2014-02-27 10:17:13 +1100 | [diff] [blame] | 1126 | * If CanonicalizePermittedCNAMEs have been specified but |
| 1127 | * other canonicalization did not happen (by not being requested |
| 1128 | * or by failing with fallback) then the hostname may still be changed |
djm@openbsd.org@openbsd.org | dbe0662 | 2017-10-27 01:57:06 +0000 | [diff] [blame] | 1129 | * as a result of CNAME following. |
Damien Miller | 08b57c6 | 2014-02-27 10:17:13 +1100 | [diff] [blame] | 1130 | * |
| 1131 | * Try to resolve the bare hostname name using the system resolver's |
| 1132 | * usual search rules and then apply the CNAME follow rules. |
| 1133 | * |
| 1134 | * Skip the lookup if a ProxyCommand is being used unless the user |
| 1135 | * has specifically requested canonicalisation for this case via |
| 1136 | * CanonicalizeHostname=always |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 1137 | */ |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 1138 | direct = option_clear_or_none(options.proxy_command) && |
| 1139 | options.jump_host == NULL; |
| 1140 | if (addrs == NULL && options.num_permitted_cnames != 0 && (direct || |
| 1141 | options.canonicalize_hostname == SSH_CANONICALISE_ALWAYS)) { |
Damien Miller | 19439e9 | 2014-07-02 15:28:40 +1000 | [diff] [blame] | 1142 | if ((addrs = resolve_host(host, options.port, |
djm@openbsd.org | 383a33d | 2018-09-21 03:11:36 +0000 | [diff] [blame] | 1143 | direct, cname, sizeof(cname))) == NULL) { |
Damien Miller | 19439e9 | 2014-07-02 15:28:40 +1000 | [diff] [blame] | 1144 | /* Don't fatal proxied host names not in the DNS */ |
djm@openbsd.org | 383a33d | 2018-09-21 03:11:36 +0000 | [diff] [blame] | 1145 | if (direct) |
Damien Miller | 19439e9 | 2014-07-02 15:28:40 +1000 | [diff] [blame] | 1146 | cleanup_exit(255); /* logged in resolve_host */ |
| 1147 | } else |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 1148 | check_follow_cname(direct, &host, cname); |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 1149 | } |
| 1150 | |
| 1151 | /* |
djm@openbsd.org | 957fbce | 2014-10-08 22:20:25 +0000 | [diff] [blame] | 1152 | * If canonicalisation is enabled then re-parse the configuration |
| 1153 | * files as new stanzas may match. |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 1154 | */ |
djm@openbsd.org | 9e34e0c | 2018-11-23 05:08:07 +0000 | [diff] [blame] | 1155 | if (options.canonicalize_hostname != 0 && !want_final_pass) { |
| 1156 | debug("hostname canonicalisation enabled, " |
| 1157 | "will re-parse configuration"); |
| 1158 | want_final_pass = 1; |
| 1159 | } |
| 1160 | |
| 1161 | if (want_final_pass) { |
| 1162 | debug("re-parsing configuration"); |
djm@openbsd.org | 957fbce | 2014-10-08 22:20:25 +0000 | [diff] [blame] | 1163 | free(options.hostname); |
| 1164 | options.hostname = xstrdup(host); |
djm@openbsd.org | 9e34e0c | 2018-11-23 05:08:07 +0000 | [diff] [blame] | 1165 | process_config_files(host_arg, pw, 1, NULL); |
djm@openbsd.org | 957fbce | 2014-10-08 22:20:25 +0000 | [diff] [blame] | 1166 | /* |
| 1167 | * Address resolution happens early with canonicalisation |
| 1168 | * enabled and the port number may have changed since, so |
| 1169 | * reset it in address list |
| 1170 | */ |
| 1171 | if (addrs != NULL && options.port > 0) |
| 1172 | set_addrinfo_port(addrs, options.port); |
Ben Lindstrom | 14f31ab | 2001-09-12 17:48:04 +0000 | [diff] [blame] | 1173 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1174 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1175 | /* Fill configuration defaults. */ |
| 1176 | fill_default_options(&options); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1177 | |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 1178 | /* |
| 1179 | * If ProxyJump option specified, then construct a ProxyCommand now. |
| 1180 | */ |
| 1181 | if (options.jump_host != NULL) { |
| 1182 | char port_s[8]; |
djm@openbsd.org | d8748b9 | 2018-06-01 03:11:49 +0000 | [diff] [blame] | 1183 | const char *sshbin = argv0; |
| 1184 | |
| 1185 | /* |
| 1186 | * Try to use SSH indicated by argv[0], but fall back to |
| 1187 | * "ssh" if it appears unavailable. |
| 1188 | */ |
| 1189 | if (strchr(argv0, '/') != NULL && access(argv0, X_OK) != 0) |
| 1190 | sshbin = "ssh"; |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 1191 | |
| 1192 | /* Consistency check */ |
| 1193 | if (options.proxy_command != NULL) |
| 1194 | fatal("inconsistent options: ProxyCommand+ProxyJump"); |
| 1195 | /* Never use FD passing for ProxyJump */ |
| 1196 | options.proxy_use_fdpass = 0; |
| 1197 | snprintf(port_s, sizeof(port_s), "%d", options.jump_port); |
| 1198 | xasprintf(&options.proxy_command, |
djm@openbsd.org | d8748b9 | 2018-06-01 03:11:49 +0000 | [diff] [blame] | 1199 | "%s%s%s%s%s%s%s%s%s%s%.*s -W '[%%h]:%%p' %s", |
| 1200 | sshbin, |
djm@openbsd.org | ed877ef | 2016-07-15 00:24:30 +0000 | [diff] [blame] | 1201 | /* Optional "-l user" argument if jump_user set */ |
| 1202 | options.jump_user == NULL ? "" : " -l ", |
| 1203 | options.jump_user == NULL ? "" : options.jump_user, |
| 1204 | /* Optional "-p port" argument if jump_port set */ |
| 1205 | options.jump_port <= 0 ? "" : " -p ", |
| 1206 | options.jump_port <= 0 ? "" : port_s, |
| 1207 | /* Optional additional jump hosts ",..." */ |
| 1208 | options.jump_extra == NULL ? "" : " -J ", |
| 1209 | options.jump_extra == NULL ? "" : options.jump_extra, |
| 1210 | /* Optional "-F" argumment if -F specified */ |
| 1211 | config == NULL ? "" : " -F ", |
| 1212 | config == NULL ? "" : config, |
| 1213 | /* Optional "-v" arguments if -v set */ |
| 1214 | debug_flag ? " -" : "", |
| 1215 | debug_flag, "vvv", |
| 1216 | /* Mandatory hostname */ |
| 1217 | options.jump_host); |
| 1218 | debug("Setting implicit ProxyCommand from ProxyJump: %s", |
| 1219 | options.proxy_command); |
| 1220 | } |
| 1221 | |
Damien Miller | 13f97b2 | 2014-02-24 15:57:55 +1100 | [diff] [blame] | 1222 | if (options.port == 0) |
| 1223 | options.port = default_ssh_port(); |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1224 | channel_set_af(ssh, options.address_family); |
Darren Tucker | 0a4f04b | 2003-07-03 20:37:47 +1000 | [diff] [blame] | 1225 | |
Damien Miller | e9fc72e | 2013-10-15 12:14:12 +1100 | [diff] [blame] | 1226 | /* Tidy and check options */ |
| 1227 | if (options.host_key_alias != NULL) |
| 1228 | lowercase(options.host_key_alias); |
| 1229 | if (options.proxy_command != NULL && |
| 1230 | strcmp(options.proxy_command, "-") == 0 && |
| 1231 | options.proxy_use_fdpass) |
| 1232 | fatal("ProxyCommand=- and ProxyUseFDPass are incompatible"); |
djm@openbsd.org | 44732de | 2015-02-20 22:17:21 +0000 | [diff] [blame] | 1233 | if (options.control_persist && |
| 1234 | options.update_hostkeys == SSH_UPDATE_HOSTKEYS_ASK) { |
| 1235 | debug("UpdateHostKeys=ask is incompatible with ControlPersist; " |
| 1236 | "disabling"); |
| 1237 | options.update_hostkeys = 0; |
| 1238 | } |
djm@openbsd.org | 88b6fcd | 2015-11-19 08:23:27 +0000 | [diff] [blame] | 1239 | if (options.connection_attempts <= 0) |
| 1240 | fatal("Invalid number of ConnectionAttempts"); |
Damien Miller | e9fc72e | 2013-10-15 12:14:12 +1100 | [diff] [blame] | 1241 | |
markus@openbsd.org | cecee2d | 2018-07-09 21:03:30 +0000 | [diff] [blame] | 1242 | if (sshbuf_len(command) != 0 && options.remote_command != NULL) |
bluhm@openbsd.org | 1112b53 | 2017-05-30 18:58:37 +0000 | [diff] [blame] | 1243 | fatal("Cannot execute command-line and remote command."); |
| 1244 | |
| 1245 | /* Cannot fork to background if no command. */ |
markus@openbsd.org | cecee2d | 2018-07-09 21:03:30 +0000 | [diff] [blame] | 1246 | if (fork_after_authentication_flag && sshbuf_len(command) == 0 && |
bluhm@openbsd.org | 1112b53 | 2017-05-30 18:58:37 +0000 | [diff] [blame] | 1247 | options.remote_command == NULL && !no_shell_flag) |
| 1248 | fatal("Cannot fork into background without a command " |
| 1249 | "to execute."); |
| 1250 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1251 | /* reinit */ |
dtucker@openbsd.org | 68d3a2a | 2017-04-28 03:20:27 +0000 | [diff] [blame] | 1252 | log_init(argv0, options.log_level, options.log_facility, !use_syslog); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1253 | |
Damien Miller | fff9f09 | 2012-07-06 13:45:01 +1000 | [diff] [blame] | 1254 | if (options.request_tty == REQUEST_TTY_YES || |
| 1255 | options.request_tty == REQUEST_TTY_FORCE) |
| 1256 | tty_flag = 1; |
| 1257 | |
| 1258 | /* Allocate a tty by default if no command specified. */ |
markus@openbsd.org | cecee2d | 2018-07-09 21:03:30 +0000 | [diff] [blame] | 1259 | if (sshbuf_len(command) == 0 && options.remote_command == NULL) |
Damien Miller | fff9f09 | 2012-07-06 13:45:01 +1000 | [diff] [blame] | 1260 | tty_flag = options.request_tty != REQUEST_TTY_NO; |
| 1261 | |
| 1262 | /* Force no tty */ |
markus@openbsd.org | 8d05784 | 2016-09-30 09:19:13 +0000 | [diff] [blame] | 1263 | if (options.request_tty == REQUEST_TTY_NO || |
| 1264 | (muxclient_command && muxclient_command != SSHMUX_COMMAND_PROXY)) |
Damien Miller | fff9f09 | 2012-07-06 13:45:01 +1000 | [diff] [blame] | 1265 | tty_flag = 0; |
| 1266 | /* Do not allocate a tty if stdin is not a tty. */ |
| 1267 | if ((!isatty(fileno(stdin)) || stdin_null_flag) && |
| 1268 | options.request_tty != REQUEST_TTY_FORCE) { |
| 1269 | if (tty_flag) |
| 1270 | logit("Pseudo-terminal will not be allocated because " |
| 1271 | "stdin is not a terminal."); |
| 1272 | tty_flag = 0; |
| 1273 | } |
| 1274 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1275 | if (options.user == NULL) |
| 1276 | options.user = xstrdup(pw->pw_name); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1277 | |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 1278 | /* Set up strings used to percent_expand() arguments */ |
Damien Miller | dfc85fa | 2011-05-15 08:44:02 +1000 | [diff] [blame] | 1279 | if (gethostname(thishost, sizeof(thishost)) == -1) |
| 1280 | fatal("gethostname: %s", strerror(errno)); |
| 1281 | strlcpy(shorthost, thishost, sizeof(shorthost)); |
| 1282 | shorthost[strcspn(thishost, ".")] = '\0'; |
| 1283 | snprintf(portstr, sizeof(portstr), "%d", options.port); |
djm@openbsd.org | 9c935dd | 2018-06-01 03:33:53 +0000 | [diff] [blame] | 1284 | snprintf(uidstr, sizeof(uidstr), "%llu", |
| 1285 | (unsigned long long)pw->pw_uid); |
Darren Tucker | f6b01b7 | 2008-06-13 04:56:37 +1000 | [diff] [blame] | 1286 | |
Damien Miller | 9c38643 | 2014-07-03 21:27:46 +1000 | [diff] [blame] | 1287 | if ((md = ssh_digest_start(SSH_DIGEST_SHA1)) == NULL || |
| 1288 | ssh_digest_update(md, thishost, strlen(thishost)) < 0 || |
| 1289 | ssh_digest_update(md, host, strlen(host)) < 0 || |
| 1290 | ssh_digest_update(md, portstr, strlen(portstr)) < 0 || |
| 1291 | ssh_digest_update(md, options.user, strlen(options.user)) < 0 || |
| 1292 | ssh_digest_final(md, conn_hash, sizeof(conn_hash)) < 0) |
| 1293 | fatal("%s: mux digest failed", __func__); |
| 1294 | ssh_digest_free(md); |
| 1295 | conn_hash_hex = tohex(conn_hash, ssh_digest_bytes(SSH_DIGEST_SHA1)); |
| 1296 | |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 1297 | /* |
| 1298 | * Expand tokens in arguments. NB. LocalCommand is expanded later, |
| 1299 | * after port-forwarding is set up, so it may pick up any local |
| 1300 | * tunnel interface name allocated. |
| 1301 | */ |
bluhm@openbsd.org | 1112b53 | 2017-05-30 18:58:37 +0000 | [diff] [blame] | 1302 | if (options.remote_command != NULL) { |
| 1303 | debug3("expanding RemoteCommand: %s", options.remote_command); |
| 1304 | cp = options.remote_command; |
| 1305 | options.remote_command = percent_expand(cp, |
| 1306 | "C", conn_hash_hex, |
| 1307 | "L", shorthost, |
| 1308 | "d", pw->pw_dir, |
| 1309 | "h", host, |
djm@openbsd.org | 9c935dd | 2018-06-01 03:33:53 +0000 | [diff] [blame] | 1310 | "i", uidstr, |
bluhm@openbsd.org | 1112b53 | 2017-05-30 18:58:37 +0000 | [diff] [blame] | 1311 | "l", thishost, |
| 1312 | "n", host_arg, |
| 1313 | "p", portstr, |
| 1314 | "r", options.user, |
| 1315 | "u", pw->pw_name, |
| 1316 | (char *)NULL); |
| 1317 | debug3("expanded RemoteCommand: %s", options.remote_command); |
| 1318 | free(cp); |
markus@openbsd.org | cecee2d | 2018-07-09 21:03:30 +0000 | [diff] [blame] | 1319 | if ((r = sshbuf_put(command, options.remote_command, |
| 1320 | strlen(options.remote_command))) != 0) |
| 1321 | fatal("%s: buffer error: %s", __func__, ssh_err(r)); |
bluhm@openbsd.org | 1112b53 | 2017-05-30 18:58:37 +0000 | [diff] [blame] | 1322 | } |
| 1323 | |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1324 | if (options.control_path != NULL) { |
dtucker@openbsd.org | e655ee0 | 2018-07-27 05:34:42 +0000 | [diff] [blame] | 1325 | cp = tilde_expand_filename(options.control_path, getuid()); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 1326 | free(options.control_path); |
Damien Miller | 9c38643 | 2014-07-03 21:27:46 +1000 | [diff] [blame] | 1327 | options.control_path = percent_expand(cp, |
| 1328 | "C", conn_hash_hex, |
| 1329 | "L", shorthost, |
| 1330 | "h", host, |
djm@openbsd.org | 9c935dd | 2018-06-01 03:33:53 +0000 | [diff] [blame] | 1331 | "i", uidstr, |
Damien Miller | 9c38643 | 2014-07-03 21:27:46 +1000 | [diff] [blame] | 1332 | "l", thishost, |
| 1333 | "n", host_arg, |
| 1334 | "p", portstr, |
| 1335 | "r", options.user, |
| 1336 | "u", pw->pw_name, |
djm@openbsd.org | 674b3b6 | 2015-09-11 03:47:28 +0000 | [diff] [blame] | 1337 | "i", uidstr, |
Damien Miller | dfc85fa | 2011-05-15 08:44:02 +1000 | [diff] [blame] | 1338 | (char *)NULL); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 1339 | free(cp); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1340 | } |
Damien Miller | 9c38643 | 2014-07-03 21:27:46 +1000 | [diff] [blame] | 1341 | |
djm@openbsd.org | 957fbce | 2014-10-08 22:20:25 +0000 | [diff] [blame] | 1342 | if (config_test) { |
| 1343 | dump_client_config(&options, host); |
| 1344 | exit(0); |
| 1345 | } |
| 1346 | |
Damien Miller | b1cbfa2 | 2008-05-19 16:00:08 +1000 | [diff] [blame] | 1347 | if (muxclient_command != 0 && options.control_path == NULL) |
Darren Tucker | 0814d31 | 2005-06-01 23:08:51 +1000 | [diff] [blame] | 1348 | fatal("No ControlPath specified for \"-O\" command"); |
markus@openbsd.org | 8d05784 | 2016-09-30 09:19:13 +0000 | [diff] [blame] | 1349 | if (options.control_path != NULL) { |
| 1350 | int sock; |
| 1351 | if ((sock = muxclient(options.control_path)) >= 0) { |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1352 | ssh_packet_set_connection(ssh, sock, sock); |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1353 | ssh_packet_set_mux(ssh); |
markus@openbsd.org | 8d05784 | 2016-09-30 09:19:13 +0000 | [diff] [blame] | 1354 | goto skip_connect; |
| 1355 | } |
| 1356 | } |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1357 | |
Damien Miller | 08b57c6 | 2014-02-27 10:17:13 +1100 | [diff] [blame] | 1358 | /* |
| 1359 | * If hostname canonicalisation was not enabled, then we may not |
| 1360 | * have yet resolved the hostname. Do so now. |
| 1361 | */ |
| 1362 | if (addrs == NULL && options.proxy_command == NULL) { |
djm@openbsd.org | a85768a | 2015-09-04 04:56:09 +0000 | [diff] [blame] | 1363 | debug2("resolving \"%s\" port %d", host, options.port); |
Damien Miller | 08b57c6 | 2014-02-27 10:17:13 +1100 | [diff] [blame] | 1364 | if ((addrs = resolve_host(host, options.port, 1, |
| 1365 | cname, sizeof(cname))) == NULL) |
| 1366 | cleanup_exit(255); /* resolve_host logs the error */ |
| 1367 | } |
| 1368 | |
Damien Miller | 67bd062 | 2007-09-17 12:06:57 +1000 | [diff] [blame] | 1369 | timeout_ms = options.connection_timeout * 1000; |
| 1370 | |
Kevin Steves | fcec7f8 | 2000-12-15 19:55:48 +0000 | [diff] [blame] | 1371 | /* Open a connection to the remote host. */ |
djm@openbsd.org | fbe24b1 | 2019-09-13 04:27:35 +0000 | [diff] [blame] | 1372 | if (ssh_connect(ssh, host_arg, host, addrs, &hostaddr, options.port, |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 1373 | options.address_family, options.connection_attempts, |
dtucker@openbsd.org | 95d41e9 | 2018-07-19 10:28:47 +0000 | [diff] [blame] | 1374 | &timeout_ms, options.tcp_keep_alive) != 0) |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 1375 | exit(255); |
| 1376 | |
Damien Miller | 28631ce | 2013-10-26 10:07:56 +1100 | [diff] [blame] | 1377 | if (addrs != NULL) |
| 1378 | freeaddrinfo(addrs); |
| 1379 | |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1380 | ssh_packet_set_timeout(ssh, options.server_alive_interval, |
Damien Miller | 0faf747 | 2013-10-17 11:47:23 +1100 | [diff] [blame] | 1381 | options.server_alive_count_max); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1382 | |
Damien Miller | 67bd062 | 2007-09-17 12:06:57 +1000 | [diff] [blame] | 1383 | if (timeout_ms > 0) |
| 1384 | debug3("timeout: %d ms remain after connect", timeout_ms); |
| 1385 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1386 | /* |
dtucker@openbsd.org | 26efc2f | 2018-07-16 11:05:41 +0000 | [diff] [blame] | 1387 | * If we successfully made the connection and we have hostbased auth |
| 1388 | * enabled, load the public keys so we can later use the ssh-keysign |
| 1389 | * helper to sign challenges. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 1390 | */ |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 1391 | sensitive_data.nkeys = 0; |
| 1392 | sensitive_data.keys = NULL; |
djm@openbsd.org | 873d3e7 | 2017-04-30 23:18:44 +0000 | [diff] [blame] | 1393 | if (options.hostbased_authentication) { |
dtucker@openbsd.org | ac59076 | 2018-07-16 22:25:01 +0000 | [diff] [blame] | 1394 | sensitive_data.nkeys = 10; |
Damien Miller | ddd63ab | 2006-03-31 23:10:51 +1100 | [diff] [blame] | 1395 | sensitive_data.keys = xcalloc(sensitive_data.nkeys, |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 1396 | sizeof(struct sshkey)); |
| 1397 | |
| 1398 | /* XXX check errors? */ |
dtucker@openbsd.org | ac59076 | 2018-07-16 22:25:01 +0000 | [diff] [blame] | 1399 | #define L_PUBKEY(p,o) do { \ |
| 1400 | if ((o) >= sensitive_data.nkeys) \ |
| 1401 | fatal("%s pubkey out of array bounds", __func__); \ |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 1402 | check_load(sshkey_load_public(p, &(sensitive_data.keys[o]), NULL), \ |
dtucker@openbsd.org | ac59076 | 2018-07-16 22:25:01 +0000 | [diff] [blame] | 1403 | p, "pubkey"); \ |
| 1404 | } while (0) |
| 1405 | #define L_CERT(p,o) do { \ |
| 1406 | if ((o) >= sensitive_data.nkeys) \ |
| 1407 | fatal("%s cert out of array bounds", __func__); \ |
| 1408 | check_load(sshkey_load_cert(p, &(sensitive_data.keys[o])), p, "cert"); \ |
| 1409 | } while (0) |
Ben Lindstrom | f9c4884 | 2002-06-11 16:37:51 +0000 | [diff] [blame] | 1410 | |
dtucker@openbsd.org | 26efc2f | 2018-07-16 11:05:41 +0000 | [diff] [blame] | 1411 | if (options.hostbased_authentication == 1) { |
dtucker@openbsd.org | ac59076 | 2018-07-16 22:25:01 +0000 | [diff] [blame] | 1412 | L_CERT(_PATH_HOST_ECDSA_KEY_FILE, 0); |
| 1413 | L_CERT(_PATH_HOST_ED25519_KEY_FILE, 1); |
| 1414 | L_CERT(_PATH_HOST_RSA_KEY_FILE, 2); |
| 1415 | L_CERT(_PATH_HOST_DSA_KEY_FILE, 3); |
| 1416 | L_PUBKEY(_PATH_HOST_ECDSA_KEY_FILE, 4); |
| 1417 | L_PUBKEY(_PATH_HOST_ED25519_KEY_FILE, 5); |
| 1418 | L_PUBKEY(_PATH_HOST_RSA_KEY_FILE, 6); |
| 1419 | L_PUBKEY(_PATH_HOST_DSA_KEY_FILE, 7); |
| 1420 | L_CERT(_PATH_HOST_XMSS_KEY_FILE, 8); |
| 1421 | L_PUBKEY(_PATH_HOST_XMSS_KEY_FILE, 9); |
Ben Lindstrom | 1bad256 | 2002-06-06 19:57:33 +0000 | [diff] [blame] | 1422 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1423 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1424 | |
dtucker@openbsd.org | 258dc8b | 2018-07-18 11:34:04 +0000 | [diff] [blame] | 1425 | /* Create ~/.ssh * directory if it doesn't already exist. */ |
Darren Tucker | 45c66d7 | 2011-11-04 10:50:40 +1100 | [diff] [blame] | 1426 | if (config == NULL) { |
| 1427 | r = snprintf(buf, sizeof buf, "%s%s%s", pw->pw_dir, |
| 1428 | strcmp(pw->pw_dir, "/") ? "/" : "", _PATH_SSH_USER_DIR); |
deraadt@openbsd.org | 4d28fa7 | 2019-06-28 13:35:04 +0000 | [diff] [blame] | 1429 | if (r > 0 && (size_t)r < sizeof(buf) && stat(buf, &st) == -1) { |
Darren Tucker | 8ccb739 | 2010-09-10 12:28:24 +1000 | [diff] [blame] | 1430 | #ifdef WITH_SELINUX |
Darren Tucker | 45c66d7 | 2011-11-04 10:50:40 +1100 | [diff] [blame] | 1431 | ssh_selinux_setfscreatecon(buf); |
Darren Tucker | 8ccb739 | 2010-09-10 12:28:24 +1000 | [diff] [blame] | 1432 | #endif |
Darren Tucker | 45c66d7 | 2011-11-04 10:50:40 +1100 | [diff] [blame] | 1433 | if (mkdir(buf, 0700) < 0) |
| 1434 | error("Could not create directory '%.200s'.", |
| 1435 | buf); |
Darren Tucker | 8ccb739 | 2010-09-10 12:28:24 +1000 | [diff] [blame] | 1436 | #ifdef WITH_SELINUX |
Darren Tucker | 45c66d7 | 2011-11-04 10:50:40 +1100 | [diff] [blame] | 1437 | ssh_selinux_setfscreatecon(NULL); |
Darren Tucker | 8ccb739 | 2010-09-10 12:28:24 +1000 | [diff] [blame] | 1438 | #endif |
Darren Tucker | 45c66d7 | 2011-11-04 10:50:40 +1100 | [diff] [blame] | 1439 | } |
Darren Tucker | 8ccb739 | 2010-09-10 12:28:24 +1000 | [diff] [blame] | 1440 | } |
Ben Lindstrom | 266dfdf | 2001-03-09 00:12:22 +0000 | [diff] [blame] | 1441 | /* load options.identity_files */ |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 1442 | load_public_identity_files(pw); |
Ben Lindstrom | 266dfdf | 2001-03-09 00:12:22 +0000 | [diff] [blame] | 1443 | |
djm@openbsd.org | 001aa55 | 2018-04-10 00:10:49 +0000 | [diff] [blame] | 1444 | /* optionally set the SSH_AUTHSOCKET_ENV_NAME variable */ |
markus@openbsd.org | 1a75d14 | 2016-05-04 14:29:58 +0000 | [diff] [blame] | 1445 | if (options.identity_agent && |
| 1446 | strcmp(options.identity_agent, SSH_AUTHSOCKET_ENV_NAME) != 0) { |
markus@openbsd.org | b02ad1c | 2016-05-04 12:21:53 +0000 | [diff] [blame] | 1447 | if (strcmp(options.identity_agent, "none") == 0) { |
| 1448 | unsetenv(SSH_AUTHSOCKET_ENV_NAME); |
| 1449 | } else { |
| 1450 | p = tilde_expand_filename(options.identity_agent, |
dtucker@openbsd.org | e655ee0 | 2018-07-27 05:34:42 +0000 | [diff] [blame] | 1451 | getuid()); |
djm@openbsd.org | 9c935dd | 2018-06-01 03:33:53 +0000 | [diff] [blame] | 1452 | cp = percent_expand(p, |
| 1453 | "d", pw->pw_dir, |
| 1454 | "h", host, |
| 1455 | "i", uidstr, |
| 1456 | "l", thishost, |
| 1457 | "r", options.user, |
| 1458 | "u", pw->pw_name, |
| 1459 | (char *)NULL); |
markus@openbsd.org | b02ad1c | 2016-05-04 12:21:53 +0000 | [diff] [blame] | 1460 | free(p); |
djm@openbsd.org | 5eff5b8 | 2018-10-03 06:38:35 +0000 | [diff] [blame] | 1461 | /* |
| 1462 | * If identity_agent represents an environment variable |
| 1463 | * then recheck that it is valid (since processing with |
| 1464 | * percent_expand() may have changed it) and substitute |
| 1465 | * its value. |
| 1466 | */ |
| 1467 | if (cp[0] == '$') { |
| 1468 | if (!valid_env_name(cp + 1)) { |
| 1469 | fatal("Invalid IdentityAgent " |
| 1470 | "environment variable name %s", cp); |
| 1471 | } |
| 1472 | if ((p = getenv(cp + 1)) == NULL) |
| 1473 | unsetenv(SSH_AUTHSOCKET_ENV_NAME); |
| 1474 | else |
| 1475 | setenv(SSH_AUTHSOCKET_ENV_NAME, p, 1); |
| 1476 | } else { |
| 1477 | /* identity_agent specifies a path directly */ |
| 1478 | setenv(SSH_AUTHSOCKET_ENV_NAME, cp, 1); |
| 1479 | } |
| 1480 | free(cp); |
markus@openbsd.org | b02ad1c | 2016-05-04 12:21:53 +0000 | [diff] [blame] | 1481 | } |
| 1482 | } |
| 1483 | |
Ben Lindstrom | 266dfdf | 2001-03-09 00:12:22 +0000 | [diff] [blame] | 1484 | /* Expand ~ in known host file names. */ |
Damien Miller | 295ee63 | 2011-05-29 21:42:31 +1000 | [diff] [blame] | 1485 | tilde_expand_paths(options.system_hostfiles, |
| 1486 | options.num_system_hostfiles); |
| 1487 | tilde_expand_paths(options.user_hostfiles, options.num_user_hostfiles); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1488 | |
Damien Miller | 07cd589 | 2001-11-12 10:52:03 +1100 | [diff] [blame] | 1489 | signal(SIGPIPE, SIG_IGN); /* ignore SIGPIPE early */ |
Damien Miller | 857b02e | 2010-09-24 22:02:56 +1000 | [diff] [blame] | 1490 | signal(SIGCHLD, main_sigchld_handler); |
Damien Miller | 07cd589 | 2001-11-12 10:52:03 +1100 | [diff] [blame] | 1491 | |
Darren Tucker | d6173c0 | 2008-06-13 04:52:53 +1000 | [diff] [blame] | 1492 | /* Log into the remote system. Never returns if the login fails. */ |
djm@openbsd.org | 0a843d9 | 2018-12-27 03:25:24 +0000 | [diff] [blame] | 1493 | ssh_login(ssh, &sensitive_data, host, (struct sockaddr *)&hostaddr, |
Damien Miller | d925dcd | 2010-12-01 12:21:51 +1100 | [diff] [blame] | 1494 | options.port, pw, timeout_ms); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1495 | |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1496 | if (ssh_packet_connection_is_on_socket(ssh)) { |
Damien Miller | 383ffe6 | 2010-06-26 10:02:03 +1000 | [diff] [blame] | 1497 | verbose("Authenticated to %s ([%s]:%d).", host, |
djm@openbsd.org | 9576726 | 2016-03-07 19:02:43 +0000 | [diff] [blame] | 1498 | ssh_remote_ipaddr(ssh), ssh_remote_port(ssh)); |
Damien Miller | 383ffe6 | 2010-06-26 10:02:03 +1000 | [diff] [blame] | 1499 | } else { |
| 1500 | verbose("Authenticated to %s (via proxy).", host); |
| 1501 | } |
| 1502 | |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 1503 | /* We no longer need the private host keys. Clear them now. */ |
| 1504 | if (sensitive_data.nkeys != 0) { |
| 1505 | for (i = 0; i < sensitive_data.nkeys; i++) { |
| 1506 | if (sensitive_data.keys[i] != NULL) { |
| 1507 | /* Destroys contents safely */ |
| 1508 | debug3("clear hostkey %d", i); |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 1509 | sshkey_free(sensitive_data.keys[i]); |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 1510 | sensitive_data.keys[i] = NULL; |
| 1511 | } |
| 1512 | } |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 1513 | free(sensitive_data.keys); |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 1514 | } |
Ben Lindstrom | a6c8a8d | 2001-08-06 21:42:00 +0000 | [diff] [blame] | 1515 | for (i = 0; i < options.num_identity_files; i++) { |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 1516 | free(options.identity_files[i]); |
| 1517 | options.identity_files[i] = NULL; |
Ben Lindstrom | a6c8a8d | 2001-08-06 21:42:00 +0000 | [diff] [blame] | 1518 | if (options.identity_keys[i]) { |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 1519 | sshkey_free(options.identity_keys[i]); |
Ben Lindstrom | a6c8a8d | 2001-08-06 21:42:00 +0000 | [diff] [blame] | 1520 | options.identity_keys[i] = NULL; |
| 1521 | } |
| 1522 | } |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 1523 | for (i = 0; i < options.num_certificate_files; i++) { |
| 1524 | free(options.certificate_files[i]); |
| 1525 | options.certificate_files[i] = NULL; |
| 1526 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 1527 | |
markus@openbsd.org | 8d05784 | 2016-09-30 09:19:13 +0000 | [diff] [blame] | 1528 | skip_connect: |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 1529 | exit_status = ssh_session2(ssh, pw); |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1530 | ssh_packet_close(ssh); |
Damien Miller | 8c4e18a | 2002-09-19 12:05:02 +1000 | [diff] [blame] | 1531 | |
Damien Miller | b1cbfa2 | 2008-05-19 16:00:08 +1000 | [diff] [blame] | 1532 | if (options.control_path != NULL && muxserver_sock != -1) |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 1533 | unlink(options.control_path); |
| 1534 | |
Damien Miller | a41ccca | 2010-10-07 22:07:32 +1100 | [diff] [blame] | 1535 | /* Kill ProxyCommand if it is running. */ |
| 1536 | ssh_kill_proxy_command(); |
Damien Miller | 8c4e18a | 2002-09-19 12:05:02 +1000 | [diff] [blame] | 1537 | |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1538 | return exit_status; |
| 1539 | } |
| 1540 | |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1541 | static void |
| 1542 | control_persist_detach(void) |
| 1543 | { |
| 1544 | pid_t pid; |
djm@openbsd.org | d2d6bf8 | 2016-04-29 08:07:53 +0000 | [diff] [blame] | 1545 | int devnull, keep_stderr; |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1546 | |
| 1547 | debug("%s: backgrounding master process", __func__); |
| 1548 | |
djm@openbsd.org | b8bbff3 | 2018-02-13 03:36:56 +0000 | [diff] [blame] | 1549 | /* |
| 1550 | * master (current process) into the background, and make the |
| 1551 | * foreground process a client of the backgrounded master. |
| 1552 | */ |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1553 | switch ((pid = fork())) { |
| 1554 | case -1: |
| 1555 | fatal("%s: fork: %s", __func__, strerror(errno)); |
| 1556 | case 0: |
| 1557 | /* Child: master process continues mainloop */ |
djm@openbsd.org | b8bbff3 | 2018-02-13 03:36:56 +0000 | [diff] [blame] | 1558 | break; |
| 1559 | default: |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1560 | /* Parent: set up mux slave to connect to backgrounded master */ |
| 1561 | debug2("%s: background process is %ld", __func__, (long)pid); |
| 1562 | stdin_null_flag = ostdin_null_flag; |
Damien Miller | 21771e2 | 2011-05-15 08:45:50 +1000 | [diff] [blame] | 1563 | options.request_tty = orequest_tty; |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1564 | tty_flag = otty_flag; |
djm@openbsd.org | b8bbff3 | 2018-02-13 03:36:56 +0000 | [diff] [blame] | 1565 | close(muxserver_sock); |
| 1566 | muxserver_sock = -1; |
Damien Miller | 5929c52 | 2010-09-10 11:17:02 +1000 | [diff] [blame] | 1567 | options.control_master = SSHCTL_MASTER_NO; |
djm@openbsd.org | b8bbff3 | 2018-02-13 03:36:56 +0000 | [diff] [blame] | 1568 | muxclient(options.control_path); |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1569 | /* muxclient() doesn't return on success. */ |
djm@openbsd.org | b8bbff3 | 2018-02-13 03:36:56 +0000 | [diff] [blame] | 1570 | fatal("Failed to connect to new control master"); |
| 1571 | } |
Damien Miller | 00d9ae2 | 2010-08-17 01:59:31 +1000 | [diff] [blame] | 1572 | if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1) { |
| 1573 | error("%s: open(\"/dev/null\"): %s", __func__, |
| 1574 | strerror(errno)); |
| 1575 | } else { |
djm@openbsd.org | d2d6bf8 | 2016-04-29 08:07:53 +0000 | [diff] [blame] | 1576 | keep_stderr = log_is_on_stderr() && debug_flag; |
Damien Miller | 00d9ae2 | 2010-08-17 01:59:31 +1000 | [diff] [blame] | 1577 | if (dup2(devnull, STDIN_FILENO) == -1 || |
djm@openbsd.org | d2d6bf8 | 2016-04-29 08:07:53 +0000 | [diff] [blame] | 1578 | dup2(devnull, STDOUT_FILENO) == -1 || |
| 1579 | (!keep_stderr && dup2(devnull, STDERR_FILENO) == -1)) |
Damien Miller | 00d9ae2 | 2010-08-17 01:59:31 +1000 | [diff] [blame] | 1580 | error("%s: dup2: %s", __func__, strerror(errno)); |
| 1581 | if (devnull > STDERR_FILENO) |
| 1582 | close(devnull); |
| 1583 | } |
Damien Miller | 98e27dc | 2013-07-25 11:55:52 +1000 | [diff] [blame] | 1584 | daemon(1, 1); |
Damien Miller | ea2c1a4 | 2011-06-03 12:10:22 +1000 | [diff] [blame] | 1585 | setproctitle("%s [mux]", options.control_path); |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1586 | } |
| 1587 | |
| 1588 | /* Do fork() after authentication. Used by "ssh -f" */ |
| 1589 | static void |
| 1590 | fork_postauth(void) |
| 1591 | { |
| 1592 | if (need_controlpersist_detach) |
| 1593 | control_persist_detach(); |
| 1594 | debug("forking to background"); |
| 1595 | fork_after_authentication_flag = 0; |
deraadt@openbsd.org | 4d28fa7 | 2019-06-28 13:35:04 +0000 | [diff] [blame] | 1596 | if (daemon(1, 1) == -1) |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1597 | fatal("daemon() failed: %.200s", strerror(errno)); |
| 1598 | } |
| 1599 | |
Darren Tucker | 9f407c4 | 2008-06-13 04:50:27 +1000 | [diff] [blame] | 1600 | /* Callback for remote forward global requests */ |
| 1601 | static void |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1602 | ssh_confirm_remote_forward(struct ssh *ssh, int type, u_int32_t seq, void *ctxt) |
Darren Tucker | 9f407c4 | 2008-06-13 04:50:27 +1000 | [diff] [blame] | 1603 | { |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 1604 | struct Forward *rfwd = (struct Forward *)ctxt; |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1605 | u_int port; |
| 1606 | int r; |
Darren Tucker | 9f407c4 | 2008-06-13 04:50:27 +1000 | [diff] [blame] | 1607 | |
Damien Miller | 4bf648f | 2009-02-14 16:28:21 +1100 | [diff] [blame] | 1608 | /* XXX verbose() on failure? */ |
Damien Miller | 4b3ed64 | 2014-07-02 15:29:40 +1000 | [diff] [blame] | 1609 | debug("remote forward %s for: listen %s%s%d, connect %s:%d", |
Darren Tucker | 9f407c4 | 2008-06-13 04:50:27 +1000 | [diff] [blame] | 1610 | type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure", |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 1611 | rfwd->listen_path ? rfwd->listen_path : |
| 1612 | rfwd->listen_host ? rfwd->listen_host : "", |
| 1613 | (rfwd->listen_path || rfwd->listen_host) ? ":" : "", |
| 1614 | rfwd->listen_port, rfwd->connect_path ? rfwd->connect_path : |
| 1615 | rfwd->connect_host, rfwd->connect_port); |
| 1616 | if (rfwd->listen_path == NULL && rfwd->listen_port == 0) { |
Darren Tucker | 68afb8c | 2011-10-02 18:59:03 +1100 | [diff] [blame] | 1617 | if (type == SSH2_MSG_REQUEST_SUCCESS) { |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1618 | if ((r = sshpkt_get_u32(ssh, &port)) != 0) |
| 1619 | fatal("%s: %s", __func__, ssh_err(r)); |
| 1620 | if (port > 65535) { |
| 1621 | error("Invalid allocated port %u for remote " |
| 1622 | "forward to %s:%d", port, |
| 1623 | rfwd->connect_host, rfwd->connect_port); |
| 1624 | /* Ensure failure processing runs below */ |
| 1625 | type = SSH2_MSG_REQUEST_FAILURE; |
| 1626 | channel_update_permission(ssh, |
| 1627 | rfwd->handle, -1); |
| 1628 | } else { |
| 1629 | rfwd->allocated_port = (int)port; |
| 1630 | logit("Allocated port %u for remote " |
| 1631 | "forward to %s:%d", |
| 1632 | rfwd->allocated_port, rfwd->connect_host, |
| 1633 | rfwd->connect_port); |
| 1634 | channel_update_permission(ssh, |
| 1635 | rfwd->handle, rfwd->allocated_port); |
| 1636 | } |
Darren Tucker | 68afb8c | 2011-10-02 18:59:03 +1100 | [diff] [blame] | 1637 | } else { |
djm@openbsd.org | 115063a | 2018-06-06 18:22:41 +0000 | [diff] [blame] | 1638 | channel_update_permission(ssh, rfwd->handle, -1); |
Darren Tucker | 68afb8c | 2011-10-02 18:59:03 +1100 | [diff] [blame] | 1639 | } |
Damien Miller | 4bf648f | 2009-02-14 16:28:21 +1100 | [diff] [blame] | 1640 | } |
djm@openbsd.org@openbsd.org | dbe0662 | 2017-10-27 01:57:06 +0000 | [diff] [blame] | 1641 | |
Darren Tucker | 9f407c4 | 2008-06-13 04:50:27 +1000 | [diff] [blame] | 1642 | if (type == SSH2_MSG_REQUEST_FAILURE) { |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 1643 | if (options.exit_on_forward_failure) { |
| 1644 | if (rfwd->listen_path != NULL) |
| 1645 | fatal("Error: remote port forwarding failed " |
| 1646 | "for listen path %s", rfwd->listen_path); |
| 1647 | else |
| 1648 | fatal("Error: remote port forwarding failed " |
| 1649 | "for listen port %d", rfwd->listen_port); |
| 1650 | } else { |
| 1651 | if (rfwd->listen_path != NULL) |
| 1652 | logit("Warning: remote port forwarding failed " |
| 1653 | "for listen path %s", rfwd->listen_path); |
| 1654 | else |
| 1655 | logit("Warning: remote port forwarding failed " |
| 1656 | "for listen port %d", rfwd->listen_port); |
| 1657 | } |
Darren Tucker | 9f407c4 | 2008-06-13 04:50:27 +1000 | [diff] [blame] | 1658 | } |
Darren Tucker | 9a2a609 | 2008-07-04 12:53:50 +1000 | [diff] [blame] | 1659 | if (++remote_forward_confirms_received == options.num_remote_forwards) { |
Darren Tucker | 9f407c4 | 2008-06-13 04:50:27 +1000 | [diff] [blame] | 1660 | debug("All remote forwarding requests processed"); |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1661 | if (fork_after_authentication_flag) |
| 1662 | fork_postauth(); |
Darren Tucker | 9a2a609 | 2008-07-04 12:53:50 +1000 | [diff] [blame] | 1663 | } |
Darren Tucker | 9f407c4 | 2008-06-13 04:50:27 +1000 | [diff] [blame] | 1664 | } |
| 1665 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1666 | static void |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1667 | client_cleanup_stdio_fwd(struct ssh *ssh, int id, void *arg) |
Darren Tucker | 7ad8dd2 | 2010-01-12 19:40:27 +1100 | [diff] [blame] | 1668 | { |
| 1669 | debug("stdio forwarding: done"); |
| 1670 | cleanup_exit(0); |
| 1671 | } |
| 1672 | |
Darren Tucker | 2d6665d | 2011-11-04 10:54:22 +1100 | [diff] [blame] | 1673 | static void |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1674 | ssh_stdio_confirm(struct ssh *ssh, int id, int success, void *arg) |
Damien Miller | 357610d | 2014-07-18 15:04:10 +1000 | [diff] [blame] | 1675 | { |
| 1676 | if (!success) |
| 1677 | fatal("stdio forwarding failed"); |
| 1678 | } |
| 1679 | |
| 1680 | static void |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1681 | ssh_init_stdio_forwarding(struct ssh *ssh) |
Darren Tucker | 7ad8dd2 | 2010-01-12 19:40:27 +1100 | [diff] [blame] | 1682 | { |
| 1683 | Channel *c; |
Damien Miller | e1537f9 | 2010-01-26 13:26:22 +1100 | [diff] [blame] | 1684 | int in, out; |
Darren Tucker | 7ad8dd2 | 2010-01-12 19:40:27 +1100 | [diff] [blame] | 1685 | |
dtucker@openbsd.org | 8543ff3 | 2016-06-03 03:14:41 +0000 | [diff] [blame] | 1686 | if (options.stdio_forward_host == NULL) |
Darren Tucker | 2d6665d | 2011-11-04 10:54:22 +1100 | [diff] [blame] | 1687 | return; |
Damien Miller | e1537f9 | 2010-01-26 13:26:22 +1100 | [diff] [blame] | 1688 | |
dtucker@openbsd.org | 8543ff3 | 2016-06-03 03:14:41 +0000 | [diff] [blame] | 1689 | debug3("%s: %s:%d", __func__, options.stdio_forward_host, |
| 1690 | options.stdio_forward_port); |
Darren Tucker | 2d6665d | 2011-11-04 10:54:22 +1100 | [diff] [blame] | 1691 | |
deraadt@openbsd.org | 4d28fa7 | 2019-06-28 13:35:04 +0000 | [diff] [blame] | 1692 | if ((in = dup(STDIN_FILENO)) == -1 || |
| 1693 | (out = dup(STDOUT_FILENO)) == -1) |
Damien Miller | e1537f9 | 2010-01-26 13:26:22 +1100 | [diff] [blame] | 1694 | fatal("channel_connect_stdio_fwd: dup() in/out failed"); |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1695 | if ((c = channel_connect_stdio_fwd(ssh, options.stdio_forward_host, |
dtucker@openbsd.org | 8543ff3 | 2016-06-03 03:14:41 +0000 | [diff] [blame] | 1696 | options.stdio_forward_port, in, out)) == NULL) |
Darren Tucker | 2d6665d | 2011-11-04 10:54:22 +1100 | [diff] [blame] | 1697 | fatal("%s: channel_connect_stdio_fwd failed", __func__); |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1698 | channel_register_cleanup(ssh, c->self, client_cleanup_stdio_fwd, 0); |
| 1699 | channel_register_open_confirm(ssh, c->self, ssh_stdio_confirm, NULL); |
Darren Tucker | 7ad8dd2 | 2010-01-12 19:40:27 +1100 | [diff] [blame] | 1700 | } |
| 1701 | |
| 1702 | static void |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 1703 | ssh_init_forwarding(struct ssh *ssh, char **ifname) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1704 | { |
Kevin Steves | 1205750 | 2001-02-05 14:54:34 +0000 | [diff] [blame] | 1705 | int success = 0; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1706 | int i; |
Kevin Steves | 1205750 | 2001-02-05 14:54:34 +0000 | [diff] [blame] | 1707 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1708 | /* Initiate local TCP/IP port forwardings. */ |
| 1709 | for (i = 0; i < options.num_local_forwards; i++) { |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1710 | debug("Local connections to %.200s:%d forwarded to remote " |
| 1711 | "address %.200s:%d", |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 1712 | (options.local_forwards[i].listen_path != NULL) ? |
| 1713 | options.local_forwards[i].listen_path : |
Darren Tucker | 47eede7 | 2005-03-14 23:08:12 +1100 | [diff] [blame] | 1714 | (options.local_forwards[i].listen_host == NULL) ? |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 1715 | (options.fwd_opts.gateway_ports ? "*" : "LOCALHOST") : |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1716 | options.local_forwards[i].listen_host, |
| 1717 | options.local_forwards[i].listen_port, |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 1718 | (options.local_forwards[i].connect_path != NULL) ? |
| 1719 | options.local_forwards[i].connect_path : |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1720 | options.local_forwards[i].connect_host, |
| 1721 | options.local_forwards[i].connect_port); |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1722 | success += channel_setup_local_fwd_listener(ssh, |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 1723 | &options.local_forwards[i], &options.fwd_opts); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1724 | } |
Darren Tucker | e7d4b19 | 2006-07-12 22:17:10 +1000 | [diff] [blame] | 1725 | if (i > 0 && success != i && options.exit_on_forward_failure) |
| 1726 | fatal("Could not request local forwarding."); |
Kevin Steves | 1205750 | 2001-02-05 14:54:34 +0000 | [diff] [blame] | 1727 | if (i > 0 && success == 0) |
| 1728 | error("Could not request local forwarding."); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1729 | |
| 1730 | /* Initiate remote TCP/IP port forwardings. */ |
| 1731 | for (i = 0; i < options.num_remote_forwards; i++) { |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1732 | debug("Remote connections from %.200s:%d forwarded to " |
| 1733 | "local address %.200s:%d", |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 1734 | (options.remote_forwards[i].listen_path != NULL) ? |
| 1735 | options.remote_forwards[i].listen_path : |
Damien Miller | 46d38de | 2005-07-17 17:02:09 +1000 | [diff] [blame] | 1736 | (options.remote_forwards[i].listen_host == NULL) ? |
Damien Miller | aa3bb10 | 2005-11-05 15:12:59 +1100 | [diff] [blame] | 1737 | "LOCALHOST" : options.remote_forwards[i].listen_host, |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1738 | options.remote_forwards[i].listen_port, |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 1739 | (options.remote_forwards[i].connect_path != NULL) ? |
| 1740 | options.remote_forwards[i].connect_path : |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 1741 | options.remote_forwards[i].connect_host, |
| 1742 | options.remote_forwards[i].connect_port); |
Darren Tucker | 68afb8c | 2011-10-02 18:59:03 +1100 | [diff] [blame] | 1743 | options.remote_forwards[i].handle = |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1744 | channel_request_remote_forwarding(ssh, |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 1745 | &options.remote_forwards[i]); |
Darren Tucker | 68afb8c | 2011-10-02 18:59:03 +1100 | [diff] [blame] | 1746 | if (options.remote_forwards[i].handle < 0) { |
Darren Tucker | e7d4b19 | 2006-07-12 22:17:10 +1000 | [diff] [blame] | 1747 | if (options.exit_on_forward_failure) |
| 1748 | fatal("Could not request remote forwarding."); |
| 1749 | else |
| 1750 | logit("Warning: Could not request remote " |
| 1751 | "forwarding."); |
Darren Tucker | 68afb8c | 2011-10-02 18:59:03 +1100 | [diff] [blame] | 1752 | } else { |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1753 | client_register_global_confirm( |
| 1754 | ssh_confirm_remote_forward, |
Darren Tucker | 68afb8c | 2011-10-02 18:59:03 +1100 | [diff] [blame] | 1755 | &options.remote_forwards[i]); |
Darren Tucker | e7d4b19 | 2006-07-12 22:17:10 +1000 | [diff] [blame] | 1756 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1757 | } |
Damien Miller | b3ce9fe | 2007-08-08 14:32:41 +1000 | [diff] [blame] | 1758 | |
| 1759 | /* Initiate tunnel forwarding. */ |
| 1760 | if (options.tun_open != SSH_TUNMODE_NO) { |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 1761 | if ((*ifname = client_request_tun_fwd(ssh, |
| 1762 | options.tun_open, options.tun_local, |
| 1763 | options.tun_remote)) == NULL) { |
Damien Miller | b3ce9fe | 2007-08-08 14:32:41 +1000 | [diff] [blame] | 1764 | if (options.exit_on_forward_failure) |
| 1765 | fatal("Could not request tunnel forwarding."); |
| 1766 | else |
| 1767 | error("Could not request tunnel forwarding."); |
| 1768 | } |
djm@openbsd.org@openbsd.org | dbe0662 | 2017-10-27 01:57:06 +0000 | [diff] [blame] | 1769 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1770 | } |
| 1771 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1772 | static void |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1773 | check_agent_present(void) |
| 1774 | { |
djm@openbsd.org | 141efe4 | 2015-01-14 20:05:27 +0000 | [diff] [blame] | 1775 | int r; |
| 1776 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1777 | if (options.forward_agent) { |
Damien Miller | 788f212 | 2005-11-05 15:14:59 +1100 | [diff] [blame] | 1778 | /* Clear agent forwarding if we don't have an agent. */ |
djm@openbsd.org | 141efe4 | 2015-01-14 20:05:27 +0000 | [diff] [blame] | 1779 | if ((r = ssh_get_authentication_socket(NULL)) != 0) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1780 | options.forward_agent = 0; |
djm@openbsd.org | 141efe4 | 2015-01-14 20:05:27 +0000 | [diff] [blame] | 1781 | if (r != SSH_ERR_AGENT_NOT_PRESENT) |
| 1782 | debug("ssh_get_authentication_socket: %s", |
| 1783 | ssh_err(r)); |
| 1784 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1785 | } |
| 1786 | } |
| 1787 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1788 | static void |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1789 | ssh_session2_setup(struct ssh *ssh, int id, int success, void *arg) |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1790 | { |
Damien Miller | 3756dce | 2004-06-18 01:17:29 +1000 | [diff] [blame] | 1791 | extern char **environ; |
Damien Miller | 17e7ed0 | 2005-06-17 12:54:33 +1000 | [diff] [blame] | 1792 | const char *display; |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1793 | int r, interactive = tty_flag; |
djm@openbsd.org | ed4ce82 | 2016-01-13 23:04:47 +0000 | [diff] [blame] | 1794 | char *proto = NULL, *data = NULL; |
Damien Miller | 17e7ed0 | 2005-06-17 12:54:33 +1000 | [diff] [blame] | 1795 | |
Damien Miller | d530f5f | 2010-05-21 14:57:10 +1000 | [diff] [blame] | 1796 | if (!success) |
| 1797 | return; /* No need for error message, channels code sens one */ |
| 1798 | |
Damien Miller | 46d38de | 2005-07-17 17:02:09 +1000 | [diff] [blame] | 1799 | display = getenv("DISPLAY"); |
djm@openbsd.org | a58be33 | 2015-04-17 13:16:48 +0000 | [diff] [blame] | 1800 | if (display == NULL && options.forward_x11) |
| 1801 | debug("X11 forwarding requested but DISPLAY not set"); |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1802 | if (options.forward_x11 && client_x11_get_proto(ssh, display, |
djm@openbsd.org | ed4ce82 | 2016-01-13 23:04:47 +0000 | [diff] [blame] | 1803 | options.xauth_location, options.forward_x11_trusted, |
| 1804 | options.forward_x11_timeout, &proto, &data) == 0) { |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1805 | /* Request forwarding with authentication spoofing. */ |
Darren Tucker | d6173c0 | 2008-06-13 04:52:53 +1000 | [diff] [blame] | 1806 | debug("Requesting X11 forwarding with authentication " |
| 1807 | "spoofing."); |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1808 | x11_request_forwarding_with_spoofing(ssh, id, display, proto, |
Damien Miller | 6d7b437 | 2011-06-23 08:31:57 +1000 | [diff] [blame] | 1809 | data, 1); |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1810 | client_expect_confirm(ssh, id, "X11 forwarding", CONFIRM_WARN); |
Damien Miller | 6d7b437 | 2011-06-23 08:31:57 +1000 | [diff] [blame] | 1811 | /* XXX exit_on_forward_failure */ |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 1812 | interactive = 1; |
Damien Miller | bd483e7 | 2000-04-30 10:00:53 +1000 | [diff] [blame] | 1813 | } |
| 1814 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1815 | check_agent_present(); |
| 1816 | if (options.forward_agent) { |
| 1817 | debug("Requesting authentication agent forwarding."); |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1818 | channel_request_start(ssh, id, "auth-agent-req@openssh.com", 0); |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1819 | if ((r = sshpkt_send(ssh)) != 0) |
| 1820 | fatal("%s: %s", __func__, ssh_err(r)); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1821 | } |
| 1822 | |
Darren Tucker | 7b30501 | 2012-07-02 18:55:09 +1000 | [diff] [blame] | 1823 | /* Tell the packet module whether this is an interactive session. */ |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1824 | ssh_packet_set_interactive(ssh, interactive, |
Darren Tucker | 7b30501 | 2012-07-02 18:55:09 +1000 | [diff] [blame] | 1825 | options.ip_qos_interactive, options.ip_qos_bulk); |
| 1826 | |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1827 | client_session2_setup(ssh, id, tty_flag, subsystem_flag, getenv("TERM"), |
markus@openbsd.org | cecee2d | 2018-07-09 21:03:30 +0000 | [diff] [blame] | 1828 | NULL, fileno(stdin), command, environ); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1829 | } |
| 1830 | |
Ben Lindstrom | f558cf6 | 2001-09-20 23:13:49 +0000 | [diff] [blame] | 1831 | /* open new channel for a session */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1832 | static int |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1833 | ssh_session2_open(struct ssh *ssh) |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1834 | { |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1835 | Channel *c; |
| 1836 | int window, packetmax, in, out, err; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 1837 | |
Damien Miller | caf6dd6 | 2000-08-29 11:33:50 +1100 | [diff] [blame] | 1838 | if (stdin_null_flag) { |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 1839 | in = open(_PATH_DEVNULL, O_RDONLY); |
Damien Miller | caf6dd6 | 2000-08-29 11:33:50 +1100 | [diff] [blame] | 1840 | } else { |
| 1841 | in = dup(STDIN_FILENO); |
| 1842 | } |
| 1843 | out = dup(STDOUT_FILENO); |
| 1844 | err = dup(STDERR_FILENO); |
| 1845 | |
deraadt@openbsd.org | 4d28fa7 | 2019-06-28 13:35:04 +0000 | [diff] [blame] | 1846 | if (in == -1 || out == -1 || err == -1) |
Damien Miller | caf6dd6 | 2000-08-29 11:33:50 +1100 | [diff] [blame] | 1847 | fatal("dup() in/out/err failed"); |
| 1848 | |
Damien Miller | 69b69aa | 2000-10-28 14:19:58 +1100 | [diff] [blame] | 1849 | /* enable nonblocking unless tty */ |
| 1850 | if (!isatty(in)) |
| 1851 | set_nonblock(in); |
| 1852 | if (!isatty(out)) |
| 1853 | set_nonblock(out); |
| 1854 | if (!isatty(err)) |
| 1855 | set_nonblock(err); |
| 1856 | |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 1857 | window = CHAN_SES_WINDOW_DEFAULT; |
| 1858 | packetmax = CHAN_SES_PACKET_DEFAULT; |
Damien Miller | 19a5945 | 2002-02-19 15:20:57 +1100 | [diff] [blame] | 1859 | if (tty_flag) { |
| 1860 | window >>= 1; |
| 1861 | packetmax >>= 1; |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1862 | } |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1863 | c = channel_new(ssh, |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1864 | "session", SSH_CHANNEL_OPENING, in, out, err, |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 1865 | window, packetmax, CHAN_EXTENDED_WRITE, |
Damien Miller | b1ca8bb | 2003-05-14 13:45:42 +1000 | [diff] [blame] | 1866 | "client-session", /*nonblock*/0); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1867 | |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1868 | debug3("%s: channel_new: %d", __func__, c->self); |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1869 | |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1870 | channel_send_open(ssh, c->self); |
Ben Lindstrom | f558cf6 | 2001-09-20 23:13:49 +0000 | [diff] [blame] | 1871 | if (!no_shell_flag) |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1872 | channel_register_open_confirm(ssh, c->self, |
Damien Miller | b84886b | 2008-05-19 15:05:07 +1000 | [diff] [blame] | 1873 | ssh_session2_setup, NULL); |
Damien Miller | 1383bd8 | 2000-04-06 12:32:37 +1000 | [diff] [blame] | 1874 | |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 1875 | return c->self; |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1876 | } |
| 1877 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 1878 | static int |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 1879 | ssh_session2(struct ssh *ssh, struct passwd *pw) |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1880 | { |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1881 | int r, devnull, id = -1; |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 1882 | char *cp, *tun_fwd_ifname = NULL; |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1883 | |
| 1884 | /* XXX should be pre-session */ |
Darren Tucker | 2d6665d | 2011-11-04 10:54:22 +1100 | [diff] [blame] | 1885 | if (!options.control_persist) |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1886 | ssh_init_stdio_forwarding(ssh); |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 1887 | |
| 1888 | ssh_init_forwarding(ssh, &tun_fwd_ifname); |
| 1889 | |
| 1890 | if (options.local_command != NULL) { |
| 1891 | debug3("expanding LocalCommand: %s", options.local_command); |
| 1892 | cp = options.local_command; |
| 1893 | options.local_command = percent_expand(cp, |
| 1894 | "C", conn_hash_hex, |
| 1895 | "L", shorthost, |
| 1896 | "d", pw->pw_dir, |
| 1897 | "h", host, |
djm@openbsd.org | 9c935dd | 2018-06-01 03:33:53 +0000 | [diff] [blame] | 1898 | "i", uidstr, |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 1899 | "l", thishost, |
| 1900 | "n", host_arg, |
| 1901 | "p", portstr, |
| 1902 | "r", options.user, |
| 1903 | "u", pw->pw_name, |
| 1904 | "T", tun_fwd_ifname == NULL ? "NONE" : tun_fwd_ifname, |
| 1905 | (char *)NULL); |
| 1906 | debug3("expanded LocalCommand: %s", options.local_command); |
| 1907 | free(cp); |
| 1908 | } |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1909 | |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1910 | /* Start listening for multiplex clients */ |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1911 | if (!ssh_packet_get_mux(ssh)) |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1912 | muxserver_listen(ssh); |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1913 | |
djm@openbsd.org | b8bbff3 | 2018-02-13 03:36:56 +0000 | [diff] [blame] | 1914 | /* |
Darren Tucker | 2d6665d | 2011-11-04 10:54:22 +1100 | [diff] [blame] | 1915 | * If we are in control persist mode and have a working mux listen |
| 1916 | * socket, then prepare to background ourselves and have a foreground |
| 1917 | * client attach as a control slave. |
| 1918 | * NB. we must save copies of the flags that we override for |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1919 | * the backgrounding, since we defer attachment of the slave until |
| 1920 | * after the connection is fully established (in particular, |
| 1921 | * async rfwd replies have been received for ExitOnForwardFailure). |
| 1922 | */ |
djm@openbsd.org | b8bbff3 | 2018-02-13 03:36:56 +0000 | [diff] [blame] | 1923 | if (options.control_persist && muxserver_sock != -1) { |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1924 | ostdin_null_flag = stdin_null_flag; |
| 1925 | ono_shell_flag = no_shell_flag; |
Damien Miller | 21771e2 | 2011-05-15 08:45:50 +1000 | [diff] [blame] | 1926 | orequest_tty = options.request_tty; |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1927 | otty_flag = tty_flag; |
djm@openbsd.org | b8bbff3 | 2018-02-13 03:36:56 +0000 | [diff] [blame] | 1928 | stdin_null_flag = 1; |
| 1929 | no_shell_flag = 1; |
| 1930 | tty_flag = 0; |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1931 | if (!fork_after_authentication_flag) |
| 1932 | need_controlpersist_detach = 1; |
| 1933 | fork_after_authentication_flag = 1; |
djm@openbsd.org | b8bbff3 | 2018-02-13 03:36:56 +0000 | [diff] [blame] | 1934 | } |
Darren Tucker | 2d6665d | 2011-11-04 10:54:22 +1100 | [diff] [blame] | 1935 | /* |
| 1936 | * ControlPersist mux listen socket setup failed, attempt the |
| 1937 | * stdio forward setup that we skipped earlier. |
| 1938 | */ |
| 1939 | if (options.control_persist && muxserver_sock == -1) |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1940 | ssh_init_stdio_forwarding(ssh); |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1941 | |
djm@openbsd.org | 14b5c63 | 2018-01-23 05:27:21 +0000 | [diff] [blame] | 1942 | if (!no_shell_flag) |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1943 | id = ssh_session2_open(ssh); |
Damien Miller | 649fe02 | 2013-07-18 16:13:55 +1000 | [diff] [blame] | 1944 | else { |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1945 | ssh_packet_set_interactive(ssh, |
Damien Miller | 649fe02 | 2013-07-18 16:13:55 +1000 | [diff] [blame] | 1946 | options.control_master == SSHCTL_MASTER_NO, |
| 1947 | options.ip_qos_interactive, options.ip_qos_bulk); |
| 1948 | } |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1949 | |
Darren Tucker | 8901fa9 | 2008-06-11 09:34:01 +1000 | [diff] [blame] | 1950 | /* If we don't expect to open a new session, then disallow it */ |
Damien Miller | 456e6f0 | 2008-11-03 19:20:10 +1100 | [diff] [blame] | 1951 | if (options.control_master == SSHCTL_MASTER_NO && |
| 1952 | (datafellows & SSH_NEW_OPENSSH)) { |
Darren Tucker | 8901fa9 | 2008-06-11 09:34:01 +1000 | [diff] [blame] | 1953 | debug("Requesting no-more-sessions@openssh.com"); |
djm@openbsd.org | 25b2ed6 | 2019-01-19 21:36:06 +0000 | [diff] [blame] | 1954 | if ((r = sshpkt_start(ssh, SSH2_MSG_GLOBAL_REQUEST)) != 0 || |
| 1955 | (r = sshpkt_put_cstring(ssh, |
| 1956 | "no-more-sessions@openssh.com")) != 0 || |
| 1957 | (r = sshpkt_put_u8(ssh, 0)) != 0 || |
| 1958 | (r = sshpkt_send(ssh)) != 0) |
| 1959 | fatal("%s: %s", __func__, ssh_err(r)); |
Darren Tucker | 8901fa9 | 2008-06-11 09:34:01 +1000 | [diff] [blame] | 1960 | } |
| 1961 | |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 1962 | /* Execute a local command */ |
| 1963 | if (options.local_command != NULL && |
| 1964 | options.permit_local_command) |
| 1965 | ssh_local_cmd(options.local_command); |
| 1966 | |
Damien Miller | 1f25ab4 | 2010-07-16 13:56:23 +1000 | [diff] [blame] | 1967 | /* |
djm@openbsd.org | 4d5456c | 2017-10-25 00:21:37 +0000 | [diff] [blame] | 1968 | * stdout is now owned by the session channel; clobber it here |
| 1969 | * so future channel closes are propagated to the local fd. |
| 1970 | * NB. this can only happen after LocalCommand has completed, |
| 1971 | * as it may want to write to stdout. |
| 1972 | */ |
djm@openbsd.org@openbsd.org | 939b30b | 2017-11-01 00:04:15 +0000 | [diff] [blame] | 1973 | if (!need_controlpersist_detach) { |
| 1974 | if ((devnull = open(_PATH_DEVNULL, O_WRONLY)) == -1) |
| 1975 | error("%s: open %s: %s", __func__, |
| 1976 | _PATH_DEVNULL, strerror(errno)); |
deraadt@openbsd.org | 4d28fa7 | 2019-06-28 13:35:04 +0000 | [diff] [blame] | 1977 | if (dup2(devnull, STDOUT_FILENO) == -1) |
djm@openbsd.org@openbsd.org | 939b30b | 2017-11-01 00:04:15 +0000 | [diff] [blame] | 1978 | fatal("%s: dup2() stdout failed", __func__); |
| 1979 | if (devnull > STDERR_FILENO) |
| 1980 | close(devnull); |
| 1981 | } |
djm@openbsd.org | 4d5456c | 2017-10-25 00:21:37 +0000 | [diff] [blame] | 1982 | |
| 1983 | /* |
Damien Miller | 1f25ab4 | 2010-07-16 13:56:23 +1000 | [diff] [blame] | 1984 | * If requested and we are not interested in replies to remote |
| 1985 | * forwarding requests, then let ssh continue in the background. |
| 1986 | */ |
Damien Miller | e11e1ea | 2010-08-03 16:04:46 +1000 | [diff] [blame] | 1987 | if (fork_after_authentication_flag) { |
| 1988 | if (options.exit_on_forward_failure && |
| 1989 | options.num_remote_forwards > 0) { |
| 1990 | debug("deferring postauth fork until remote forward " |
| 1991 | "confirmation received"); |
| 1992 | } else |
| 1993 | fork_postauth(); |
Darren Tucker | 9a2a609 | 2008-07-04 12:53:50 +1000 | [diff] [blame] | 1994 | } |
Ben Lindstrom | 4c3f77d | 2001-04-05 23:37:36 +0000 | [diff] [blame] | 1995 | |
djm@openbsd.org | dbee411 | 2017-09-12 06:32:07 +0000 | [diff] [blame] | 1996 | return client_loop(ssh, tty_flag, tty_flag ? |
Ben Lindstrom | 2b1f71b | 2001-06-05 20:32:21 +0000 | [diff] [blame] | 1997 | options.escape_char : SSH_ESCAPECHAR_NONE, id); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1998 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 1999 | |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2000 | /* Loads all IdentityFile and CertificateFile keys */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 2001 | static void |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 2002 | load_public_identity_files(struct passwd *pw) |
Ben Lindstrom | 266dfdf | 2001-03-09 00:12:22 +0000 | [diff] [blame] | 2003 | { |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 2004 | char *filename, *cp; |
markus@openbsd.org | 54d90ac | 2017-05-30 08:52:19 +0000 | [diff] [blame] | 2005 | struct sshkey *public; |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2006 | int i; |
| 2007 | u_int n_ids, n_certs; |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2008 | char *identity_files[SSH_MAX_IDENTITY_FILES]; |
markus@openbsd.org | 54d90ac | 2017-05-30 08:52:19 +0000 | [diff] [blame] | 2009 | struct sshkey *identity_keys[SSH_MAX_IDENTITY_FILES]; |
djm@openbsd.org | 3eb7f10 | 2018-07-16 07:06:50 +0000 | [diff] [blame] | 2010 | int identity_file_userprovided[SSH_MAX_IDENTITY_FILES]; |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2011 | char *certificate_files[SSH_MAX_CERTIFICATE_FILES]; |
| 2012 | struct sshkey *certificates[SSH_MAX_CERTIFICATE_FILES]; |
djm@openbsd.org | 3eb7f10 | 2018-07-16 07:06:50 +0000 | [diff] [blame] | 2013 | int certificate_file_userprovided[SSH_MAX_CERTIFICATE_FILES]; |
Damien Miller | 7ea845e | 2010-02-12 09:21:02 +1100 | [diff] [blame] | 2014 | #ifdef ENABLE_PKCS11 |
markus@openbsd.org | 54d90ac | 2017-05-30 08:52:19 +0000 | [diff] [blame] | 2015 | struct sshkey **keys; |
Damien Miller | 7ea845e | 2010-02-12 09:21:02 +1100 | [diff] [blame] | 2016 | int nkeys; |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2017 | #endif /* PKCS11 */ |
Ben Lindstrom | 0936a5b | 2002-03-26 03:17:42 +0000 | [diff] [blame] | 2018 | |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2019 | n_ids = n_certs = 0; |
Damien Miller | 1d2c456 | 2014-02-04 11:18:20 +1100 | [diff] [blame] | 2020 | memset(identity_files, 0, sizeof(identity_files)); |
| 2021 | memset(identity_keys, 0, sizeof(identity_keys)); |
djm@openbsd.org | 3eb7f10 | 2018-07-16 07:06:50 +0000 | [diff] [blame] | 2022 | memset(identity_file_userprovided, 0, |
| 2023 | sizeof(identity_file_userprovided)); |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2024 | memset(certificate_files, 0, sizeof(certificate_files)); |
| 2025 | memset(certificates, 0, sizeof(certificates)); |
djm@openbsd.org | 3eb7f10 | 2018-07-16 07:06:50 +0000 | [diff] [blame] | 2026 | memset(certificate_file_userprovided, 0, |
| 2027 | sizeof(certificate_file_userprovided)); |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2028 | |
| 2029 | #ifdef ENABLE_PKCS11 |
Damien Miller | 7ea845e | 2010-02-12 09:21:02 +1100 | [diff] [blame] | 2030 | if (options.pkcs11_provider != NULL && |
Ben Lindstrom | 0936a5b | 2002-03-26 03:17:42 +0000 | [diff] [blame] | 2031 | options.num_identity_files < SSH_MAX_IDENTITY_FILES && |
Damien Miller | 7ea845e | 2010-02-12 09:21:02 +1100 | [diff] [blame] | 2032 | (pkcs11_init(!options.batch_mode) == 0) && |
| 2033 | (nkeys = pkcs11_add_provider(options.pkcs11_provider, NULL, |
| 2034 | &keys)) > 0) { |
Damien Miller | 7ea845e | 2010-02-12 09:21:02 +1100 | [diff] [blame] | 2035 | for (i = 0; i < nkeys; i++) { |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2036 | if (n_ids >= SSH_MAX_IDENTITY_FILES) { |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 2037 | sshkey_free(keys[i]); |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2038 | continue; |
| 2039 | } |
| 2040 | identity_keys[n_ids] = keys[i]; |
| 2041 | identity_files[n_ids] = |
Damien Miller | 7ea845e | 2010-02-12 09:21:02 +1100 | [diff] [blame] | 2042 | xstrdup(options.pkcs11_provider); /* XXX */ |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2043 | n_ids++; |
Ben Lindstrom | 0936a5b | 2002-03-26 03:17:42 +0000 | [diff] [blame] | 2044 | } |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 2045 | free(keys); |
Ben Lindstrom | 711b04a | 2001-08-06 21:12:42 +0000 | [diff] [blame] | 2046 | } |
Damien Miller | 7ea845e | 2010-02-12 09:21:02 +1100 | [diff] [blame] | 2047 | #endif /* ENABLE_PKCS11 */ |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2048 | for (i = 0; i < options.num_identity_files; i++) { |
Darren Tucker | 15fd19c | 2013-04-05 11:22:26 +1100 | [diff] [blame] | 2049 | if (n_ids >= SSH_MAX_IDENTITY_FILES || |
| 2050 | strcasecmp(options.identity_files[i], "none") == 0) { |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 2051 | free(options.identity_files[i]); |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2052 | options.identity_files[i] = NULL; |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2053 | continue; |
| 2054 | } |
dtucker@openbsd.org | e655ee0 | 2018-07-27 05:34:42 +0000 | [diff] [blame] | 2055 | cp = tilde_expand_filename(options.identity_files[i], getuid()); |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 2056 | filename = percent_expand(cp, "d", pw->pw_dir, |
| 2057 | "u", pw->pw_name, "l", thishost, "h", host, |
Damien Miller | 6b1d53c | 2006-03-31 23:13:21 +1100 | [diff] [blame] | 2058 | "r", options.user, (char *)NULL); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 2059 | free(cp); |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 2060 | check_load(sshkey_load_public(filename, &public, NULL), |
| 2061 | filename, "pubkey"); |
Ben Lindstrom | 266dfdf | 2001-03-09 00:12:22 +0000 | [diff] [blame] | 2062 | debug("identity file %s type %d", filename, |
| 2063 | public ? public->type : -1); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 2064 | free(options.identity_files[i]); |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2065 | identity_files[n_ids] = filename; |
| 2066 | identity_keys[n_ids] = public; |
djm@openbsd.org | 3eb7f10 | 2018-07-16 07:06:50 +0000 | [diff] [blame] | 2067 | identity_file_userprovided[n_ids] = |
| 2068 | options.identity_file_userprovided[i]; |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2069 | if (++n_ids >= SSH_MAX_IDENTITY_FILES) |
| 2070 | continue; |
| 2071 | |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2072 | /* |
| 2073 | * If no certificates have been explicitly listed then try |
| 2074 | * to add the default certificate variant too. |
| 2075 | */ |
| 2076 | if (options.num_certificate_files != 0) |
| 2077 | continue; |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2078 | xasprintf(&cp, "%s-cert", filename); |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 2079 | check_load(sshkey_load_public(cp, &public, NULL), |
| 2080 | filename, "pubkey"); |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2081 | debug("identity file %s type %d", cp, |
| 2082 | public ? public->type : -1); |
| 2083 | if (public == NULL) { |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 2084 | free(cp); |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2085 | continue; |
| 2086 | } |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 2087 | if (!sshkey_is_cert(public)) { |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2088 | debug("%s: key %s type %s is not a certificate", |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 2089 | __func__, cp, sshkey_type(public)); |
| 2090 | sshkey_free(public); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 2091 | free(cp); |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2092 | continue; |
| 2093 | } |
djm@openbsd.org | b4867e0 | 2016-12-06 07:48:01 +0000 | [diff] [blame] | 2094 | /* NB. leave filename pointing to private key */ |
| 2095 | identity_files[n_ids] = xstrdup(filename); |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2096 | identity_keys[n_ids] = public; |
djm@openbsd.org | 3eb7f10 | 2018-07-16 07:06:50 +0000 | [diff] [blame] | 2097 | identity_file_userprovided[n_ids] = |
| 2098 | options.identity_file_userprovided[i]; |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2099 | n_ids++; |
Ben Lindstrom | 266dfdf | 2001-03-09 00:12:22 +0000 | [diff] [blame] | 2100 | } |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2101 | |
| 2102 | if (options.num_certificate_files > SSH_MAX_CERTIFICATE_FILES) |
| 2103 | fatal("%s: too many certificates", __func__); |
| 2104 | for (i = 0; i < options.num_certificate_files; i++) { |
| 2105 | cp = tilde_expand_filename(options.certificate_files[i], |
dtucker@openbsd.org | e655ee0 | 2018-07-27 05:34:42 +0000 | [diff] [blame] | 2106 | getuid()); |
djm@openbsd.org | 9c935dd | 2018-06-01 03:33:53 +0000 | [diff] [blame] | 2107 | filename = percent_expand(cp, |
| 2108 | "d", pw->pw_dir, |
| 2109 | "h", host, |
djm@openbsd.org | 0368889 | 2018-06-08 03:35:36 +0000 | [diff] [blame] | 2110 | "i", uidstr, |
djm@openbsd.org | 9c935dd | 2018-06-01 03:33:53 +0000 | [diff] [blame] | 2111 | "l", thishost, |
| 2112 | "r", options.user, |
| 2113 | "u", pw->pw_name, |
| 2114 | (char *)NULL); |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2115 | free(cp); |
| 2116 | |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 2117 | check_load(sshkey_load_public(filename, &public, NULL), |
| 2118 | filename, "certificate"); |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2119 | debug("certificate file %s type %d", filename, |
| 2120 | public ? public->type : -1); |
| 2121 | free(options.certificate_files[i]); |
| 2122 | options.certificate_files[i] = NULL; |
| 2123 | if (public == NULL) { |
| 2124 | free(filename); |
| 2125 | continue; |
| 2126 | } |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 2127 | if (!sshkey_is_cert(public)) { |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2128 | debug("%s: key %s type %s is not a certificate", |
markus@openbsd.org | 5467fbc | 2018-07-11 18:53:29 +0000 | [diff] [blame] | 2129 | __func__, filename, sshkey_type(public)); |
| 2130 | sshkey_free(public); |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2131 | free(filename); |
| 2132 | continue; |
| 2133 | } |
| 2134 | certificate_files[n_certs] = filename; |
| 2135 | certificates[n_certs] = public; |
djm@openbsd.org | 3eb7f10 | 2018-07-16 07:06:50 +0000 | [diff] [blame] | 2136 | certificate_file_userprovided[n_certs] = |
| 2137 | options.certificate_file_userprovided[i]; |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2138 | ++n_certs; |
| 2139 | } |
| 2140 | |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2141 | options.num_identity_files = n_ids; |
| 2142 | memcpy(options.identity_files, identity_files, sizeof(identity_files)); |
| 2143 | memcpy(options.identity_keys, identity_keys, sizeof(identity_keys)); |
djm@openbsd.org | 3eb7f10 | 2018-07-16 07:06:50 +0000 | [diff] [blame] | 2144 | memcpy(options.identity_file_userprovided, |
| 2145 | identity_file_userprovided, sizeof(identity_file_userprovided)); |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 2146 | |
djm@openbsd.org | 4e44a79 | 2015-09-24 06:15:11 +0000 | [diff] [blame] | 2147 | options.num_certificate_files = n_certs; |
| 2148 | memcpy(options.certificate_files, |
| 2149 | certificate_files, sizeof(certificate_files)); |
| 2150 | memcpy(options.certificates, certificates, sizeof(certificates)); |
djm@openbsd.org | 3eb7f10 | 2018-07-16 07:06:50 +0000 | [diff] [blame] | 2151 | memcpy(options.certificate_file_userprovided, |
| 2152 | certificate_file_userprovided, |
| 2153 | sizeof(certificate_file_userprovided)); |
Ben Lindstrom | 266dfdf | 2001-03-09 00:12:22 +0000 | [diff] [blame] | 2154 | } |
Damien Miller | 857b02e | 2010-09-24 22:02:56 +1000 | [diff] [blame] | 2155 | |
| 2156 | static void |
| 2157 | main_sigchld_handler(int sig) |
| 2158 | { |
| 2159 | int save_errno = errno; |
| 2160 | pid_t pid; |
| 2161 | int status; |
| 2162 | |
| 2163 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0 || |
deraadt@openbsd.org | 4d28fa7 | 2019-06-28 13:35:04 +0000 | [diff] [blame] | 2164 | (pid == -1 && errno == EINTR)) |
Damien Miller | 857b02e | 2010-09-24 22:02:56 +1000 | [diff] [blame] | 2165 | ; |
Damien Miller | 857b02e | 2010-09-24 22:02:56 +1000 | [diff] [blame] | 2166 | errno = save_errno; |
| 2167 | } |