1 /* $OpenBSD: servconf.h,v 1.95 2010/11/13 23:27:50 djm Exp $ */ 2 3 /* 4 * Author: Tatu Ylonen <ylo@cs.hut.fi> 5 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 6 * All rights reserved 7 * Definitions for server configuration data and for the functions reading it. 8 * 9 * As far as I am concerned, the code I have written for this software 10 * can be used freely for any purpose. Any derived versions of this 11 * software must be clearly marked as such, and if the derived work is 12 * incompatible with the protocol description in the RFC file, it must be 13 * called by a name other than "ssh" or "Secure Shell". 14 */ 15 16 #ifndef SERVCONF_H 17 #define SERVCONF_H 18 19 #define MAX_PORTS 256 /* Max # ports. */ 20 21 #define MAX_ALLOW_USERS 256 /* Max # users on allow list. */ 22 #define MAX_DENY_USERS 256 /* Max # users on deny list. */ 23 #define MAX_ALLOW_GROUPS 256 /* Max # groups on allow list. */ 24 #define MAX_DENY_GROUPS 256 /* Max # groups on deny list. */ 25 #define MAX_SUBSYSTEMS 256 /* Max # subsystems. */ 26 #define MAX_HOSTKEYS 256 /* Max # hostkeys. */ 27 #define MAX_HOSTCERTS 256 /* Max # host certificates. */ 28 #define MAX_ACCEPT_ENV 256 /* Max # of env vars. */ 29 #define MAX_MATCH_GROUPS 256 /* Max # of groups for Match. */ 30 31 /* permit_root_login */ 32 #define PERMIT_NOT_SET -1 33 #define PERMIT_NO 0 34 #define PERMIT_FORCED_ONLY 1 35 #define PERMIT_NO_PASSWD 2 36 #define PERMIT_YES 3 37 38 #define DEFAULT_AUTH_FAIL_MAX 6 /* Default for MaxAuthTries */ 39 #define DEFAULT_SESSIONS_MAX 10 /* Default for MaxSessions */ 40 41 /* Magic name for internal sftp-server */ 42 #define INTERNAL_SFTP_NAME "internal-sftp" 43 44 typedef struct { 45 u_int num_ports; 46 u_int ports_from_cmdline; 47 int ports[MAX_PORTS]; /* Port number to listen on. */ 48 char *listen_addr; /* Address on which the server listens. */ 49 struct addrinfo *listen_addrs; /* Addresses on which the server listens. */ 50 int address_family; /* Address family used by the server. */ 51 char *host_key_files[MAX_HOSTKEYS]; /* Files containing host keys. */ 52 int num_host_key_files; /* Number of files for host keys. */ 53 char *host_cert_files[MAX_HOSTCERTS]; /* Files containing host certs. */ 54 int num_host_cert_files; /* Number of files for host certs. */ 55 char *pid_file; /* Where to put our pid */ 56 int server_key_bits;/* Size of the server key. */ 57 int login_grace_time; /* Disconnect if no auth in this time 58 * (sec). */ 59 int key_regeneration_time; /* Server key lifetime (seconds). */ 60 int permit_root_login; /* PERMIT_*, see above */ 61 int ignore_rhosts; /* Ignore .rhosts and .shosts. */ 62 int ignore_user_known_hosts; /* Ignore ~/.ssh/known_hosts 63 * for RhostsRsaAuth */ 64 int print_motd; /* If true, print /etc/motd. */ 65 int print_lastlog; /* If true, print lastlog */ 66 int x11_forwarding; /* If true, permit inet (spoofing) X11 fwd. */ 67 int x11_display_offset; /* What DISPLAY number to start 68 * searching at */ 69 int x11_use_localhost; /* If true, use localhost for fake X11 server. */ 70 char *xauth_location; /* Location of xauth program */ 71 int strict_modes; /* If true, require string home dir modes. */ 72 int tcp_keep_alive; /* If true, set SO_KEEPALIVE. */ 73 int ip_qos_interactive; /* IP ToS/DSCP/class for interactive */ 74 int ip_qos_bulk; /* IP ToS/DSCP/class for bulk traffic */ 75 char *ciphers; /* Supported SSH2 ciphers. */ 76 char *macs; /* Supported SSH2 macs. */ 77 char *kex_algorithms; /* SSH2 kex methods in order of preference. */ 78 int protocol; /* Supported protocol versions. */ 79 int gateway_ports; /* If true, allow remote connects to forwarded ports. */ 80 SyslogFacility log_facility; /* Facility for system logging. */ 81 LogLevel log_level; /* Level for system logging. */ 82 int rhosts_rsa_authentication; /* If true, permit rhosts RSA 83 * authentication. */ 84 int hostbased_authentication; /* If true, permit ssh2 hostbased auth */ 85 int hostbased_uses_name_from_packet_only; /* experimental */ 86 int rsa_authentication; /* If true, permit RSA authentication. */ 87 int pubkey_authentication; /* If true, permit ssh2 pubkey authentication. */ 88 int kerberos_authentication; /* If true, permit Kerberos 89 * authentication. */ 90 int kerberos_or_local_passwd; /* If true, permit kerberos 91 * and any other password 92 * authentication mechanism, 93 * such as SecurID or 94 * /etc/passwd */ 95 int kerberos_ticket_cleanup; /* If true, destroy ticket 96 * file on logout. */ 97 int kerberos_get_afs_token; /* If true, try to get AFS token if 98 * authenticated with Kerberos. */ 99 int gss_authentication; /* If true, permit GSSAPI authentication */ 100 int gss_cleanup_creds; /* If true, destroy cred cache on logout */ 101 int password_authentication; /* If true, permit password 102 * authentication. */ 103 int kbd_interactive_authentication; /* If true, permit */ 104 int challenge_response_authentication; 105 int zero_knowledge_password_authentication; 106 /* If true, permit jpake auth */ 107 int permit_blacklisted_keys; /* If true, permit */ 108 int permit_empty_passwd; /* If false, do not permit empty 109 * passwords. */ 110 int permit_user_env; /* If true, read ~/.ssh/environment */ 111 int use_login; /* If true, login(1) is used */ 112 int compression; /* If true, compression is allowed */ 113 int allow_tcp_forwarding; 114 int allow_agent_forwarding; 115 u_int num_allow_users; 116 char *allow_users[MAX_ALLOW_USERS]; 117 u_int num_deny_users; 118 char *deny_users[MAX_DENY_USERS]; 119 u_int num_allow_groups; 120 char *allow_groups[MAX_ALLOW_GROUPS]; 121 u_int num_deny_groups; 122 char *deny_groups[MAX_DENY_GROUPS]; 123 124 u_int num_subsystems; 125 char *subsystem_name[MAX_SUBSYSTEMS]; 126 char *subsystem_command[MAX_SUBSYSTEMS]; 127 char *subsystem_args[MAX_SUBSYSTEMS]; 128 129 u_int num_accept_env; 130 char *accept_env[MAX_ACCEPT_ENV]; 131 132 int max_startups_begin; 133 int max_startups_rate; 134 int max_startups; 135 int max_authtries; 136 int max_sessions; 137 char *banner; /* SSH-2 banner message */ 138 int use_dns; 139 int client_alive_interval; /* 140 * poke the client this often to 141 * see if it's still there 142 */ 143 int client_alive_count_max; /* 144 * If the client is unresponsive 145 * for this many intervals above, 146 * disconnect the session 147 */ 148 149 char *authorized_keys_file; /* File containing public keys */ 150 char *authorized_keys_file2; 151 152 char *adm_forced_command; 153 154 int use_pam; /* Enable auth via PAM */ 155 int none_enabled; /* enable NONE cipher switch */ 156 int tcp_rcv_buf_poll; /* poll tcp rcv window in autotuning kernels*/ 157 int hpn_disabled; /* disable hpn functionality. false by default */ 158 int hpn_buffer_size; /* set the hpn buffer size - default 3MB */ 159 160 int permit_tun; 161 162 int num_permitted_opens; 163 164 char *chroot_directory; 165 char *revoked_keys_file; 166 char *trusted_user_ca_keys; 167 char *authorized_principals_file; 168 } ServerOptions; 169 170 void initialize_server_options(ServerOptions *); 171 void fill_default_server_options(ServerOptions *); 172 int process_server_config_line(ServerOptions *, char *, const char *, int, 173 int *, const char *, const char *, const char *); 174 void load_server_config(const char *, Buffer *); 175 void parse_server_config(ServerOptions *, const char *, Buffer *, 176 const char *, const char *, const char *); 177 void parse_server_match_config(ServerOptions *, const char *, const char *, 178 const char *); 179 void copy_set_server_options(ServerOptions *, ServerOptions *, int); 180 void dump_config(ServerOptions *); 181 char *derelativise_path(const char *); 182 183 #endif /* SERVCONF_H */ 184