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248 lines
9.5 KiB
248 lines
9.5 KiB
/* $OpenBSD: servconf.h,v 1.123 2016/11/30 03:00:05 djm Exp $ */ |
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/* |
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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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* |
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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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*/ |
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#ifndef SERVCONF_H |
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#define SERVCONF_H |
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#define MAX_PORTS 256 /* Max # ports. */ |
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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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#define MAX_SUBSYSTEMS 256 /* Max # subsystems. */ |
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#define MAX_HOSTKEYS 256 /* Max # hostkeys. */ |
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#define MAX_HOSTCERTS 256 /* Max # host certificates. */ |
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#define MAX_ACCEPT_ENV 256 /* Max # of env vars. */ |
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#define MAX_MATCH_GROUPS 256 /* Max # of groups for Match. */ |
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#define MAX_AUTHKEYS_FILES 256 /* Max # of authorized_keys files. */ |
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#define MAX_AUTH_METHODS 256 /* Max # of AuthenticationMethods. */ |
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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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/* use_privsep */ |
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#define PRIVSEP_OFF 0 |
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#define PRIVSEP_ON 1 |
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#define PRIVSEP_NOSANDBOX 2 |
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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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#define DEFAULT_AUTH_FAIL_MAX 6 /* Default for MaxAuthTries */ |
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#define DEFAULT_SESSIONS_MAX 10 /* Default for MaxSessions */ |
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/* Magic name for internal sftp-server */ |
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#define INTERNAL_SFTP_NAME "internal-sftp" |
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typedef struct { |
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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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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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struct addrinfo *listen_addrs; /* Addresses on which the server listens. */ |
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int address_family; /* Address family used by the server. */ |
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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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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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char *host_key_agent; /* ssh-agent socket for host keys. */ |
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char *pid_file; /* Where to put our pid */ |
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int login_grace_time; /* Disconnect if no auth in this time |
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* (sec). */ |
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int permit_root_login; /* PERMIT_*, see above */ |
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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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int print_lastlog; /* If true, print lastlog */ |
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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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int x11_use_localhost; /* If true, use localhost for fake X11 server. */ |
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char *xauth_location; /* Location of xauth program */ |
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int permit_tty; /* If false, deny pty allocation */ |
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int permit_user_rc; /* If false, deny ~/.ssh/rc execution */ |
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int strict_modes; /* If true, require string home dir modes. */ |
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int tcp_keep_alive; /* If true, set SO_KEEPALIVE. */ |
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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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char *ciphers; /* Supported SSH2 ciphers. */ |
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char *macs; /* Supported SSH2 macs. */ |
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char *kex_algorithms; /* SSH2 kex methods in order of preference. */ |
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struct ForwardOptions fwd_opts; /* forwarding options */ |
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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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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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char *hostbased_key_types; /* Key types allowed for hostbased */ |
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char *hostkeyalgorithms; /* SSH2 server key types */ |
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int pubkey_authentication; /* If true, permit ssh2 pubkey authentication. */ |
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char *pubkey_key_types; /* Key types allowed for public key */ |
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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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int kerberos_get_afs_token; /* If true, try to get AFS token if |
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* authenticated with Kerberos. */ |
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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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int gss_strict_acceptor; /* If true, restrict the GSSAPI acceptor name */ |
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int password_authentication; /* If true, permit password |
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* authentication. */ |
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int kbd_interactive_authentication; /* If true, permit */ |
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int challenge_response_authentication; |
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int permit_empty_passwd; /* If false, do not permit empty |
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* passwords. */ |
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int permit_user_env; /* If true, read ~/.ssh/environment */ |
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int compression; /* If true, compression is allowed */ |
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int allow_tcp_forwarding; /* One of FORWARD_* */ |
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int allow_streamlocal_forwarding; /* One of FORWARD_* */ |
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int allow_agent_forwarding; |
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int disable_forwarding; |
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u_int num_allow_users; |
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char *allow_users[MAX_ALLOW_USERS]; |
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u_int num_deny_users; |
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char *deny_users[MAX_DENY_USERS]; |
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u_int num_allow_groups; |
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char *allow_groups[MAX_ALLOW_GROUPS]; |
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u_int num_deny_groups; |
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char *deny_groups[MAX_DENY_GROUPS]; |
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u_int num_subsystems; |
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char *subsystem_name[MAX_SUBSYSTEMS]; |
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char *subsystem_command[MAX_SUBSYSTEMS]; |
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char *subsystem_args[MAX_SUBSYSTEMS]; |
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u_int num_accept_env; |
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char *accept_env[MAX_ACCEPT_ENV]; |
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int max_startups_begin; |
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int max_startups_rate; |
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int max_startups; |
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int max_authtries; |
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int max_sessions; |
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char *banner; /* SSH-2 banner message */ |
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int use_dns; |
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int client_alive_interval; /* |
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* poke the client this often to |
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* see if it's still there |
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*/ |
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int client_alive_count_max; /* |
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* If the client is unresponsive |
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* for this many intervals above, |
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* disconnect the session |
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*/ |
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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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char *adm_forced_command; |
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int use_pam; /* Enable auth via PAM */ |
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int permit_tun; |
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int num_permitted_opens; |
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char *chroot_directory; |
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char *revoked_keys_file; |
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char *trusted_user_ca_keys; |
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char *authorized_keys_command; |
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char *authorized_keys_command_user; |
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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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int64_t rekey_limit; |
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int rekey_interval; |
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char *version_addendum; /* Appended to SSH banner */ |
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u_int num_auth_methods; |
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char *auth_methods[MAX_AUTH_METHODS]; |
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int fingerprint_hash; |
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} ServerOptions; |
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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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/* |
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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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* |
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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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*/ |
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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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M_CP_STROPT(authorized_keys_command); \ |
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M_CP_STROPT(authorized_keys_command_user); \ |
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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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M_CP_STROPT(hostbased_key_types); \ |
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M_CP_STROPT(pubkey_key_types); \ |
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M_CP_STRARRAYOPT(authorized_keys_files, num_authkeys_files); \ |
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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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M_CP_STRARRAYOPT(auth_methods, num_auth_methods); \ |
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} while (0) |
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struct connection_info *get_connection_info(int, int); |
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void initialize_server_options(ServerOptions *); |
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void fill_default_server_options(ServerOptions *); |
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int process_server_config_line(ServerOptions *, char *, const char *, int, |
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int *, struct connection_info *); |
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void load_server_config(const char *, Buffer *); |
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void parse_server_config(ServerOptions *, const char *, Buffer *, |
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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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void copy_set_server_options(ServerOptions *, ServerOptions *, int); |
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void dump_config(ServerOptions *); |
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char *derelativise_path(const char *); |
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#endif /* SERVCONF_H */
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