2017-06-24 14:34:38 +08:00
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/* $OpenBSD: servconf.h,v 1.124 2017/06/24 06:34:38 djm Exp $ */
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2002-03-05 09:53:02 +08:00
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1999-10-27 11:42:43 +08:00
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/*
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1999-11-24 21:26:21 +08:00
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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* Definitions for server configuration data and for the functions reading it.
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2000-04-16 09:18:38 +08:00
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*
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2000-09-16 10:29:08 +08:00
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* As far as I am concerned, the code I have written for this software
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* can be used freely for any purpose. Any derived versions of this
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* software must be clearly marked as such, and if the derived work is
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* incompatible with the protocol description in the RFC file, it must be
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* called by a name other than "ssh" or "Secure Shell".
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1999-11-24 21:26:21 +08:00
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*/
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1999-10-27 11:42:43 +08:00
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#ifndef SERVCONF_H
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#define SERVCONF_H
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2000-01-14 12:45:46 +08:00
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#define MAX_PORTS 256 /* Max # ports. */
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1999-11-24 21:26:21 +08:00
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#define MAX_ALLOW_USERS 256 /* Max # users on allow list. */
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#define MAX_DENY_USERS 256 /* Max # users on deny list. */
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#define MAX_ALLOW_GROUPS 256 /* Max # groups on allow list. */
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#define MAX_DENY_GROUPS 256 /* Max # groups on deny list. */
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2000-06-18 12:50:44 +08:00
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#define MAX_SUBSYSTEMS 256 /* Max # subsystems. */
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2000-11-13 19:57:25 +08:00
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#define MAX_HOSTKEYS 256 /* Max # hostkeys. */
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2010-02-27 04:55:05 +08:00
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#define MAX_HOSTCERTS 256 /* Max # host certificates. */
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2004-05-02 20:11:30 +08:00
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#define MAX_ACCEPT_ENV 256 /* Max # of env vars. */
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2006-08-18 22:23:15 +08:00
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#define MAX_MATCH_GROUPS 256 /* Max # of groups for Match. */
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2011-05-29 19:39:36 +08:00
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#define MAX_AUTHKEYS_FILES 256 /* Max # of authorized_keys files. */
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2012-11-04 20:21:40 +08:00
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#define MAX_AUTH_METHODS 256 /* Max # of AuthenticationMethods. */
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1999-10-27 11:42:43 +08:00
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2001-02-15 11:08:27 +08:00
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/* permit_root_login */
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#define PERMIT_NOT_SET -1
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#define PERMIT_NO 0
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#define PERMIT_FORCED_ONLY 1
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#define PERMIT_NO_PASSWD 2
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#define PERMIT_YES 3
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2011-06-23 06:30:03 +08:00
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/* use_privsep */
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#define PRIVSEP_OFF 0
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#define PRIVSEP_ON 1
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2012-07-31 10:21:34 +08:00
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#define PRIVSEP_NOSANDBOX 2
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2011-06-23 06:30:03 +08:00
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2012-12-03 06:50:54 +08:00
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/* AllowTCPForwarding */
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#define FORWARD_DENY 0
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#define FORWARD_REMOTE (1)
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#define FORWARD_LOCAL (1<<1)
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#define FORWARD_ALLOW (FORWARD_REMOTE|FORWARD_LOCAL)
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2004-05-24 08:36:23 +08:00
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#define DEFAULT_AUTH_FAIL_MAX 6 /* Default for MaxAuthTries */
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2008-05-19 13:34:50 +08:00
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#define DEFAULT_SESSIONS_MAX 10 /* Default for MaxSessions */
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2001-02-15 11:08:27 +08:00
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2008-03-07 15:31:24 +08:00
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/* Magic name for internal sftp-server */
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#define INTERNAL_SFTP_NAME "internal-sftp"
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1999-11-24 21:26:21 +08:00
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typedef struct {
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2009-01-28 13:31:22 +08:00
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u_int num_ports;
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u_int ports_from_cmdline;
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int ports[MAX_PORTS]; /* Port number to listen on. */
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2015-04-29 11:48:56 +08:00
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u_int num_queued_listens;
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char **queued_listen_addrs;
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int *queued_listen_ports;
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2000-01-14 12:45:46 +08:00
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struct addrinfo *listen_addrs; /* Addresses on which the server listens. */
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2005-01-20 07:57:56 +08:00
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int address_family; /* Address family used by the server. */
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2000-11-13 19:57:25 +08:00
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char *host_key_files[MAX_HOSTKEYS]; /* Files containing host keys. */
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int num_host_key_files; /* Number of files for host keys. */
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2010-02-27 04:55:05 +08:00
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char *host_cert_files[MAX_HOSTCERTS]; /* Files containing host certs. */
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int num_host_cert_files; /* Number of files for host certs. */
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2013-07-20 11:21:52 +08:00
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char *host_key_agent; /* ssh-agent socket for host keys. */
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2000-05-02 07:23:45 +08:00
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char *pid_file; /* Where to put our pid */
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1999-11-24 21:26:21 +08:00
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int login_grace_time; /* Disconnect if no auth in this time
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* (sec). */
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2001-02-15 11:08:27 +08:00
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int permit_root_login; /* PERMIT_*, see above */
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1999-11-24 21:26:21 +08:00
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int ignore_rhosts; /* Ignore .rhosts and .shosts. */
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int ignore_user_known_hosts; /* Ignore ~/.ssh/known_hosts
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* for RhostsRsaAuth */
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int print_motd; /* If true, print /etc/motd. */
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2001-03-26 13:45:53 +08:00
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int print_lastlog; /* If true, print lastlog */
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1999-11-24 21:26:21 +08:00
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int x11_forwarding; /* If true, permit inet (spoofing) X11 fwd. */
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int x11_display_offset; /* What DISPLAY number to start
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* searching at */
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2002-02-05 09:11:34 +08:00
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int x11_use_localhost; /* If true, use localhost for fake X11 server. */
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2000-06-07 17:55:44 +08:00
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char *xauth_location; /* Location of xauth program */
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2013-10-30 19:21:50 +08:00
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int permit_tty; /* If false, deny pty allocation */
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2014-07-04 07:00:04 +08:00
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int permit_user_rc; /* If false, deny ~/.ssh/rc execution */
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1999-11-24 21:26:21 +08:00
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int strict_modes; /* If true, require string home dir modes. */
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2003-12-17 13:31:10 +08:00
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int tcp_keep_alive; /* If true, set SO_KEEPALIVE. */
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2010-11-20 12:19:38 +08:00
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int ip_qos_interactive; /* IP ToS/DSCP/class for interactive */
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int ip_qos_bulk; /* IP ToS/DSCP/class for bulk traffic */
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2001-02-15 11:01:59 +08:00
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char *ciphers; /* Supported SSH2 ciphers. */
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char *macs; /* Supported SSH2 macs. */
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2010-09-24 20:11:14 +08:00
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char *kex_algorithms; /* SSH2 kex methods in order of preference. */
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2014-07-18 12:11:24 +08:00
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struct ForwardOptions fwd_opts; /* forwarding options */
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1999-11-24 21:26:21 +08:00
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SyslogFacility log_facility; /* Facility for system logging. */
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LogLevel log_level; /* Level for system logging. */
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2001-04-13 07:34:34 +08:00
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int hostbased_authentication; /* If true, permit ssh2 hostbased auth */
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int hostbased_uses_name_from_packet_only; /* experimental */
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2015-01-13 15:39:19 +08:00
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char *hostbased_key_types; /* Key types allowed for hostbased */
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2015-07-10 14:21:53 +08:00
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char *hostkeyalgorithms; /* SSH2 server key types */
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2000-11-13 19:57:25 +08:00
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int pubkey_authentication; /* If true, permit ssh2 pubkey authentication. */
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2015-01-13 15:39:19 +08:00
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char *pubkey_key_types; /* Key types allowed for public key */
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1999-11-24 21:26:21 +08:00
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int kerberos_authentication; /* If true, permit Kerberos
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* authentication. */
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int kerberos_or_local_passwd; /* If true, permit kerberos
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* and any other password
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* authentication mechanism,
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* such as SecurID or
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* /etc/passwd */
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int kerberos_ticket_cleanup; /* If true, destroy ticket
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* file on logout. */
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2003-12-31 08:37:34 +08:00
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int kerberos_get_afs_token; /* If true, try to get AFS token if
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* authenticated with Kerberos. */
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2003-08-26 09:49:55 +08:00
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int gss_authentication; /* If true, permit GSSAPI authentication */
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int gss_cleanup_creds; /* If true, destroy cred cache on logout */
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2015-05-22 11:50:02 +08:00
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int gss_strict_acceptor; /* If true, restrict the GSSAPI acceptor name */
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1999-11-24 21:26:21 +08:00
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int password_authentication; /* If true, permit password
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* authentication. */
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2000-10-14 13:23:11 +08:00
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int kbd_interactive_authentication; /* If true, permit */
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2001-06-06 02:56:16 +08:00
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int challenge_response_authentication;
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1999-11-24 21:26:21 +08:00
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int permit_empty_passwd; /* If false, do not permit empty
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* passwords. */
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2002-08-01 09:28:38 +08:00
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int permit_user_env; /* If true, read ~/.ssh/environment */
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2002-06-21 09:09:47 +08:00
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int compression; /* If true, compression is allowed */
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2012-12-03 06:50:54 +08:00
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int allow_tcp_forwarding; /* One of FORWARD_* */
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2014-07-18 12:11:24 +08:00
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int allow_streamlocal_forwarding; /* One of FORWARD_* */
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2008-05-19 12:57:41 +08:00
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int allow_agent_forwarding;
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2016-11-30 11:00:05 +08:00
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int disable_forwarding;
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2000-12-22 09:43:59 +08:00
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u_int num_allow_users;
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1999-11-24 21:26:21 +08:00
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char *allow_users[MAX_ALLOW_USERS];
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2000-12-22 09:43:59 +08:00
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u_int num_deny_users;
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1999-11-24 21:26:21 +08:00
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char *deny_users[MAX_DENY_USERS];
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2000-12-22 09:43:59 +08:00
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u_int num_allow_groups;
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1999-11-24 21:26:21 +08:00
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char *allow_groups[MAX_ALLOW_GROUPS];
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2000-12-22 09:43:59 +08:00
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u_int num_deny_groups;
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1999-11-24 21:26:21 +08:00
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char *deny_groups[MAX_DENY_GROUPS];
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2000-06-18 12:50:44 +08:00
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2000-12-22 09:43:59 +08:00
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u_int num_subsystems;
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2000-06-18 12:50:44 +08:00
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char *subsystem_name[MAX_SUBSYSTEMS];
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char *subsystem_command[MAX_SUBSYSTEMS];
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2006-07-10 18:36:47 +08:00
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char *subsystem_args[MAX_SUBSYSTEMS];
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2000-07-11 15:31:38 +08:00
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2004-05-02 20:11:30 +08:00
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u_int num_accept_env;
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char *accept_env[MAX_ACCEPT_ENV];
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2000-08-18 11:59:06 +08:00
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int max_startups_begin;
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int max_startups_rate;
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2000-07-11 15:31:38 +08:00
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int max_startups;
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2004-05-24 08:36:23 +08:00
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int max_authtries;
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2008-05-19 13:34:50 +08:00
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int max_sessions;
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2001-01-09 08:35:42 +08:00
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char *banner; /* SSH-2 banner message */
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2003-06-03 08:25:48 +08:00
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int use_dns;
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2001-04-14 07:28:01 +08:00
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int client_alive_interval; /*
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2001-12-21 11:45:46 +08:00
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* poke the client this often to
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* see if it's still there
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2001-04-14 07:28:01 +08:00
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*/
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int client_alive_count_max; /*
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2001-09-13 00:40:05 +08:00
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* If the client is unresponsive
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* for this many intervals above,
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2001-12-21 11:45:46 +08:00
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* disconnect the session
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2001-04-14 07:28:01 +08:00
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*/
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2001-07-05 02:37:20 +08:00
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2011-05-29 19:39:36 +08:00
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u_int num_authkeys_files; /* Files containing public keys */
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char *authorized_keys_files[MAX_AUTHKEYS_FILES];
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2005-12-13 16:29:02 +08:00
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2006-07-24 12:06:47 +08:00
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char *adm_forced_command;
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2003-05-14 13:11:48 +08:00
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int use_pam; /* Enable auth via PAM */
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2005-12-13 16:29:02 +08:00
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int permit_tun;
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2006-07-24 12:08:13 +08:00
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int num_permitted_opens;
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2008-02-10 19:40:12 +08:00
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char *chroot_directory;
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2010-03-04 18:53:35 +08:00
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char *revoked_keys_file;
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char *trusted_user_ca_keys;
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2012-10-31 05:58:58 +08:00
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char *authorized_keys_command;
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char *authorized_keys_command_user;
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2015-05-21 14:43:30 +08:00
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char *authorized_principals_file;
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char *authorized_principals_command;
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char *authorized_principals_command_user;
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2012-04-22 09:24:43 +08:00
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2013-05-16 18:29:28 +08:00
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int64_t rekey_limit;
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int rekey_interval;
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2012-04-22 09:24:43 +08:00
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char *version_addendum; /* Appended to SSH banner */
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2012-11-04 20:21:40 +08:00
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u_int num_auth_methods;
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char *auth_methods[MAX_AUTH_METHODS];
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2014-12-22 06:27:55 +08:00
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int fingerprint_hash;
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2017-06-24 14:34:38 +08:00
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int expose_userauth_info;
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1999-11-24 21:26:21 +08:00
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} ServerOptions;
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1999-10-27 11:42:43 +08:00
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2012-05-19 17:37:01 +08:00
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/* Information about the incoming connection as used by Match */
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struct connection_info {
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const char *user;
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const char *host; /* possibly resolved hostname */
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const char *address; /* remote address */
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const char *laddress; /* local address */
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int lport; /* local port */
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};
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2011-05-20 17:04:14 +08:00
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/*
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* These are string config options that must be copied between the
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* Match sub-config and the main config, and must be sent from the
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* privsep slave to the privsep master. We use a macro to ensure all
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* the options are copied and the copies are done in the correct order.
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2013-12-05 11:07:27 +08:00
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*
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* NB. an option must appear in servconf.c:copy_set_server_options() or
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* COPY_MATCH_STRING_OPTS here but never both.
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2011-05-20 17:04:14 +08:00
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*/
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#define COPY_MATCH_STRING_OPTS() do { \
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M_CP_STROPT(banner); \
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M_CP_STROPT(trusted_user_ca_keys); \
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M_CP_STROPT(revoked_keys_file); \
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2013-01-09 12:56:45 +08:00
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M_CP_STROPT(authorized_keys_command); \
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M_CP_STROPT(authorized_keys_command_user); \
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2015-05-21 14:43:30 +08:00
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M_CP_STROPT(authorized_principals_file); \
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M_CP_STROPT(authorized_principals_command); \
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M_CP_STROPT(authorized_principals_command_user); \
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2015-01-13 15:39:19 +08:00
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M_CP_STROPT(hostbased_key_types); \
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M_CP_STROPT(pubkey_key_types); \
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2011-05-29 19:39:36 +08:00
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M_CP_STRARRAYOPT(authorized_keys_files, num_authkeys_files); \
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2012-06-20 19:53:58 +08:00
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M_CP_STRARRAYOPT(allow_users, num_allow_users); \
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M_CP_STRARRAYOPT(deny_users, num_deny_users); \
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M_CP_STRARRAYOPT(allow_groups, num_allow_groups); \
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M_CP_STRARRAYOPT(deny_groups, num_deny_groups); \
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M_CP_STRARRAYOPT(accept_env, num_accept_env); \
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2012-11-04 20:21:40 +08:00
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M_CP_STRARRAYOPT(auth_methods, num_auth_methods); \
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2011-05-20 17:04:14 +08:00
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} while (0)
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2012-05-19 17:37:01 +08:00
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struct connection_info *get_connection_info(int, int);
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2001-07-04 12:46:56 +08:00
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void initialize_server_options(ServerOptions *);
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void fill_default_server_options(ServerOptions *);
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2006-07-12 20:34:17 +08:00
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int process_server_config_line(ServerOptions *, char *, const char *, int,
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2012-05-19 17:37:01 +08:00
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int *, struct connection_info *);
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2004-06-25 11:33:20 +08:00
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void load_server_config(const char *, Buffer *);
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2006-07-12 20:34:17 +08:00
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void parse_server_config(ServerOptions *, const char *, Buffer *,
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2012-05-19 17:37:01 +08:00
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struct connection_info *);
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void parse_server_match_config(ServerOptions *, struct connection_info *);
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int parse_server_match_testspec(struct connection_info *, char *);
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int server_match_spec_complete(struct connection_info *);
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2007-02-19 19:25:37 +08:00
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void copy_set_server_options(ServerOptions *, ServerOptions *, int);
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2008-06-10 21:01:51 +08:00
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void dump_config(ServerOptions *);
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2010-01-13 19:44:29 +08:00
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char *derelativise_path(const char *);
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1999-10-27 11:42:43 +08:00
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1999-11-24 21:26:21 +08:00
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#endif /* SERVCONF_H */
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