| /* $OpenBSD: servconf.h,v 1.112 2014/01/29 06:18:35 djm Exp $ */ |
| |
| /* |
| * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| * All rights reserved |
| * Definitions for server configuration data and for the functions reading it. |
| * |
| * As far as I am concerned, the code I have written for this software |
| * can be used freely for any purpose. Any derived versions of this |
| * software must be clearly marked as such, and if the derived work is |
| * incompatible with the protocol description in the RFC file, it must be |
| * called by a name other than "ssh" or "Secure Shell". |
| */ |
| |
| #ifndef SERVCONF_H |
| #define SERVCONF_H |
| |
| #define MAX_PORTS 256 /* Max # ports. */ |
| |
| #define MAX_ALLOW_USERS 256 /* Max # users on allow list. */ |
| #define MAX_DENY_USERS 256 /* Max # users on deny list. */ |
| #define MAX_ALLOW_GROUPS 256 /* Max # groups on allow list. */ |
| #define MAX_DENY_GROUPS 256 /* Max # groups on deny list. */ |
| #define MAX_SUBSYSTEMS 256 /* Max # subsystems. */ |
| #define MAX_HOSTKEYS 256 /* Max # hostkeys. */ |
| #define MAX_HOSTCERTS 256 /* Max # host certificates. */ |
| #define MAX_ACCEPT_ENV 256 /* Max # of env vars. */ |
| #define MAX_MATCH_GROUPS 256 /* Max # of groups for Match. */ |
| #define MAX_AUTHKEYS_FILES 256 /* Max # of authorized_keys files. */ |
| #define MAX_AUTH_METHODS 256 /* Max # of AuthenticationMethods. */ |
| |
| /* permit_root_login */ |
| #define PERMIT_NOT_SET -1 |
| #define PERMIT_NO 0 |
| #define PERMIT_FORCED_ONLY 1 |
| #define PERMIT_NO_PASSWD 2 |
| #define PERMIT_YES 3 |
| |
| /* use_privsep */ |
| #define PRIVSEP_OFF 0 |
| #define PRIVSEP_ON 1 |
| #define PRIVSEP_NOSANDBOX 2 |
| |
| /* AllowTCPForwarding */ |
| #define FORWARD_DENY 0 |
| #define FORWARD_REMOTE (1) |
| #define FORWARD_LOCAL (1<<1) |
| #define FORWARD_ALLOW (FORWARD_REMOTE|FORWARD_LOCAL) |
| |
| #define DEFAULT_AUTH_FAIL_MAX 6 /* Default for MaxAuthTries */ |
| #define DEFAULT_SESSIONS_MAX 10 /* Default for MaxSessions */ |
| |
| /* Magic name for internal sftp-server */ |
| #define INTERNAL_SFTP_NAME "internal-sftp" |
| |
| typedef struct { |
| u_int num_ports; |
| u_int ports_from_cmdline; |
| int ports[MAX_PORTS]; /* Port number to listen on. */ |
| char *listen_addr; /* Address on which the server listens. */ |
| struct addrinfo *listen_addrs; /* Addresses on which the server listens. */ |
| int address_family; /* Address family used by the server. */ |
| char *host_key_files[MAX_HOSTKEYS]; /* Files containing host keys. */ |
| int num_host_key_files; /* Number of files for host keys. */ |
| char *host_cert_files[MAX_HOSTCERTS]; /* Files containing host certs. */ |
| int num_host_cert_files; /* Number of files for host certs. */ |
| char *host_key_agent; /* ssh-agent socket for host keys. */ |
| char *pid_file; /* Where to put our pid */ |
| int server_key_bits;/* Size of the server key. */ |
| int login_grace_time; /* Disconnect if no auth in this time |
| * (sec). */ |
| int key_regeneration_time; /* Server key lifetime (seconds). */ |
| int permit_root_login; /* PERMIT_*, see above */ |
| int ignore_rhosts; /* Ignore .rhosts and .shosts. */ |
| int ignore_user_known_hosts; /* Ignore ~/.ssh/known_hosts |
| * for RhostsRsaAuth */ |
| int print_motd; /* If true, print /etc/motd. */ |
| int print_lastlog; /* If true, print lastlog */ |
| int x11_forwarding; /* If true, permit inet (spoofing) X11 fwd. */ |
| int x11_display_offset; /* What DISPLAY number to start |
| * searching at */ |
| int x11_use_localhost; /* If true, use localhost for fake X11 server. */ |
| char *xauth_location; /* Location of xauth program */ |
| int permit_tty; /* If false, deny pty allocation */ |
| int strict_modes; /* If true, require string home dir modes. */ |
| int tcp_keep_alive; /* If true, set SO_KEEPALIVE. */ |
| int ip_qos_interactive; /* IP ToS/DSCP/class for interactive */ |
| int ip_qos_bulk; /* IP ToS/DSCP/class for bulk traffic */ |
| char *ciphers; /* Supported SSH2 ciphers. */ |
| char *macs; /* Supported SSH2 macs. */ |
| char *kex_algorithms; /* SSH2 kex methods in order of preference. */ |
| int protocol; /* Supported protocol versions. */ |
| int gateway_ports; /* If true, allow remote connects to forwarded ports. */ |
| SyslogFacility log_facility; /* Facility for system logging. */ |
| LogLevel log_level; /* Level for system logging. */ |
| int rhosts_rsa_authentication; /* If true, permit rhosts RSA |
| * authentication. */ |
| int hostbased_authentication; /* If true, permit ssh2 hostbased auth */ |
| int hostbased_uses_name_from_packet_only; /* experimental */ |
| int rsa_authentication; /* If true, permit RSA authentication. */ |
| int pubkey_authentication; /* If true, permit ssh2 pubkey authentication. */ |
| int kerberos_authentication; /* If true, permit Kerberos |
| * authentication. */ |
| int kerberos_or_local_passwd; /* If true, permit kerberos |
| * and any other password |
| * authentication mechanism, |
| * such as SecurID or |
| * /etc/passwd */ |
| int kerberos_ticket_cleanup; /* If true, destroy ticket |
| * file on logout. */ |
| int kerberos_get_afs_token; /* If true, try to get AFS token if |
| * authenticated with Kerberos. */ |
| int gss_authentication; /* If true, permit GSSAPI authentication */ |
| int gss_cleanup_creds; /* If true, destroy cred cache on logout */ |
| int password_authentication; /* If true, permit password |
| * authentication. */ |
| int kbd_interactive_authentication; /* If true, permit */ |
| int challenge_response_authentication; |
| int permit_empty_passwd; /* If false, do not permit empty |
| * passwords. */ |
| int permit_user_env; /* If true, read ~/.ssh/environment */ |
| int use_login; /* If true, login(1) is used */ |
| int compression; /* If true, compression is allowed */ |
| int allow_tcp_forwarding; /* One of FORWARD_* */ |
| int allow_agent_forwarding; |
| u_int num_allow_users; |
| char *allow_users[MAX_ALLOW_USERS]; |
| u_int num_deny_users; |
| char *deny_users[MAX_DENY_USERS]; |
| u_int num_allow_groups; |
| char *allow_groups[MAX_ALLOW_GROUPS]; |
| u_int num_deny_groups; |
| char *deny_groups[MAX_DENY_GROUPS]; |
| |
| u_int num_subsystems; |
| char *subsystem_name[MAX_SUBSYSTEMS]; |
| char *subsystem_command[MAX_SUBSYSTEMS]; |
| char *subsystem_args[MAX_SUBSYSTEMS]; |
| |
| u_int num_accept_env; |
| char *accept_env[MAX_ACCEPT_ENV]; |
| |
| int max_startups_begin; |
| int max_startups_rate; |
| int max_startups; |
| int max_authtries; |
| int max_sessions; |
| char *banner; /* SSH-2 banner message */ |
| int use_dns; |
| int client_alive_interval; /* |
| * poke the client this often to |
| * see if it's still there |
| */ |
| int client_alive_count_max; /* |
| * If the client is unresponsive |
| * for this many intervals above, |
| * disconnect the session |
| */ |
| |
| u_int num_authkeys_files; /* Files containing public keys */ |
| char *authorized_keys_files[MAX_AUTHKEYS_FILES]; |
| |
| char *adm_forced_command; |
| |
| int use_pam; /* Enable auth via PAM */ |
| |
| int permit_tun; |
| |
| int num_permitted_opens; |
| |
| char *chroot_directory; |
| char *revoked_keys_file; |
| char *trusted_user_ca_keys; |
| char *authorized_principals_file; |
| char *authorized_keys_command; |
| char *authorized_keys_command_user; |
| |
| int64_t rekey_limit; |
| int rekey_interval; |
| |
| char *version_addendum; /* Appended to SSH banner */ |
| |
| u_int num_auth_methods; |
| char *auth_methods[MAX_AUTH_METHODS]; |
| } ServerOptions; |
| |
| /* Information about the incoming connection as used by Match */ |
| struct connection_info { |
| const char *user; |
| const char *host; /* possibly resolved hostname */ |
| const char *address; /* remote address */ |
| const char *laddress; /* local address */ |
| int lport; /* local port */ |
| }; |
| |
| |
| /* |
| * These are string config options that must be copied between the |
| * Match sub-config and the main config, and must be sent from the |
| * privsep slave to the privsep master. We use a macro to ensure all |
| * the options are copied and the copies are done in the correct order. |
| * |
| * NB. an option must appear in servconf.c:copy_set_server_options() or |
| * COPY_MATCH_STRING_OPTS here but never both. |
| */ |
| #define COPY_MATCH_STRING_OPTS() do { \ |
| M_CP_STROPT(banner); \ |
| M_CP_STROPT(trusted_user_ca_keys); \ |
| M_CP_STROPT(revoked_keys_file); \ |
| M_CP_STROPT(authorized_principals_file); \ |
| M_CP_STROPT(authorized_keys_command); \ |
| M_CP_STROPT(authorized_keys_command_user); \ |
| M_CP_STRARRAYOPT(authorized_keys_files, num_authkeys_files); \ |
| M_CP_STRARRAYOPT(allow_users, num_allow_users); \ |
| M_CP_STRARRAYOPT(deny_users, num_deny_users); \ |
| M_CP_STRARRAYOPT(allow_groups, num_allow_groups); \ |
| M_CP_STRARRAYOPT(deny_groups, num_deny_groups); \ |
| M_CP_STRARRAYOPT(accept_env, num_accept_env); \ |
| M_CP_STRARRAYOPT(auth_methods, num_auth_methods); \ |
| } while (0) |
| |
| struct connection_info *get_connection_info(int, int); |
| void initialize_server_options(ServerOptions *); |
| void fill_default_server_options(ServerOptions *); |
| int process_server_config_line(ServerOptions *, char *, const char *, int, |
| int *, struct connection_info *); |
| void load_server_config(const char *, Buffer *); |
| void parse_server_config(ServerOptions *, const char *, Buffer *, |
| struct connection_info *); |
| void parse_server_match_config(ServerOptions *, struct connection_info *); |
| int parse_server_match_testspec(struct connection_info *, char *); |
| int server_match_spec_complete(struct connection_info *); |
| void copy_set_server_options(ServerOptions *, ServerOptions *, int); |
| void dump_config(ServerOptions *); |
| char *derelativise_path(const char *); |
| |
| #endif /* SERVCONF_H */ |