1 /* 2 * Author: Tatu Ylonen <ylo@cs.hut.fi> 3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 4 * All rights reserved 5 * Definitions for server configuration data and for the functions reading it. 6 * 7 * As far as I am concerned, the code I have written for this software 8 * can be used freely for any purpose. Any derived versions of this 9 * software must be clearly marked as such, and if the derived work is 10 * incompatible with the protocol description in the RFC file, it must be 11 * called by a name other than "ssh" or "Secure Shell". 12 */ 13 14 /* RCSID("$OpenBSD: servconf.h,v 1.41 2001/04/13 22:46:53 beck Exp $"); */ 15 /* RCSID("$FreeBSD$"); */ 16 17 #ifndef SERVCONF_H 18 #define SERVCONF_H 19 20 #define MAX_PORTS 256 /* Max # ports. */ 21 22 #define MAX_ALLOW_USERS 256 /* Max # users on allow list. */ 23 #define MAX_DENY_USERS 256 /* Max # users on deny list. */ 24 #define MAX_ALLOW_GROUPS 256 /* Max # groups on allow list. */ 25 #define MAX_DENY_GROUPS 256 /* Max # groups on deny list. */ 26 #define MAX_SUBSYSTEMS 256 /* Max # subsystems. */ 27 #define MAX_HOSTKEYS 256 /* Max # hostkeys. */ 28 29 /* permit_root_login */ 30 #define PERMIT_NOT_SET -1 31 #define PERMIT_NO 0 32 #define PERMIT_FORCED_ONLY 1 33 #define PERMIT_NO_PASSWD 2 34 #define PERMIT_YES 3 35 36 37 typedef struct { 38 u_int num_ports; 39 u_int ports_from_cmdline; 40 u_short ports[MAX_PORTS]; /* Port number to listen on. */ 41 char *listen_addr; /* Address on which the server listens. */ 42 struct addrinfo *listen_addrs; /* Addresses on which the server listens. */ 43 char *host_key_files[MAX_HOSTKEYS]; /* Files containing host keys. */ 44 int num_host_key_files; /* Number of files for host keys. */ 45 char *pid_file; /* Where to put our pid */ 46 int server_key_bits;/* Size of the server key. */ 47 int login_grace_time; /* Disconnect if no auth in this time 48 * (sec). */ 49 int key_regeneration_time; /* Server key lifetime (seconds). */ 50 int permit_root_login; /* PERMIT_*, see above */ 51 int ignore_rhosts; /* Ignore .rhosts and .shosts. */ 52 int ignore_user_known_hosts; /* Ignore ~/.ssh/known_hosts 53 * for RhostsRsaAuth */ 54 int print_motd; /* If true, print /etc/motd. */ 55 int print_lastlog; /* If true, print lastlog */ 56 int check_mail; /* If true, check for new mail. */ 57 int x11_forwarding; /* If true, permit inet (spoofing) X11 fwd. */ 58 int x11_display_offset; /* What DISPLAY number to start 59 * searching at */ 60 char *xauth_location; /* Location of xauth program */ 61 int strict_modes; /* If true, require string home dir modes. */ 62 int keepalives; /* If true, set SO_KEEPALIVE. */ 63 char *ciphers; /* Supported SSH2 ciphers. */ 64 char *macs; /* Supported SSH2 macs. */ 65 int protocol; /* Supported protocol versions. */ 66 int gateway_ports; /* If true, allow remote connects to forwarded ports. */ 67 SyslogFacility log_facility; /* Facility for system logging. */ 68 LogLevel log_level; /* Level for system logging. */ 69 int rhosts_authentication; /* If true, permit rhosts 70 * authentication. */ 71 int rhosts_rsa_authentication; /* If true, permit rhosts RSA 72 * authentication. */ 73 int hostbased_authentication; /* If true, permit ssh2 hostbased auth */ 74 int hostbased_uses_name_from_packet_only; /* experimental */ 75 int rsa_authentication; /* If true, permit RSA authentication. */ 76 #if defined(KRB4) || defined(KRB5) 77 int kerberos_authentication; /* If true, permit Kerberos auth. */ 78 #endif /* KRB4 || KRB5 */ 79 int pubkey_authentication; /* If true, permit ssh2 pubkey authentication. */ 80 #ifdef KRB4 81 int krb4_or_local_passwd; /* If true, permit kerberos v4 82 * and any other password 83 * authentication mechanism, 84 * such as SecurID or 85 * /etc/passwd */ 86 int krb4_ticket_cleanup; /* If true, destroy ticket 87 * file on logout. */ 88 #endif 89 #ifdef KRB5 90 int krb5_tgt_passing; 91 92 #endif /* KRB5 */ 93 #ifdef AFS 94 int krb4_tgt_passing; /* If true, permit Kerberos v4 tgt 95 * passing. */ 96 int afs_token_passing; /* If true, permit AFS token passing. */ 97 #endif 98 int password_authentication; /* If true, permit password 99 * authentication. */ 100 int kbd_interactive_authentication; /* If true, permit */ 101 int challenge_reponse_authentication; 102 int permit_empty_passwd; /* If false, do not permit empty 103 * passwords. */ 104 int use_login; /* If true, login(1) is used */ 105 int allow_tcp_forwarding; 106 u_int num_allow_users; 107 char *allow_users[MAX_ALLOW_USERS]; 108 u_int num_deny_users; 109 char *deny_users[MAX_DENY_USERS]; 110 u_int num_allow_groups; 111 char *allow_groups[MAX_ALLOW_GROUPS]; 112 u_int num_deny_groups; 113 char *deny_groups[MAX_DENY_GROUPS]; 114 unsigned int connections_per_period; /* 115 * If not 0, number of sshd 116 * connections accepted per 117 * connections_period. 118 */ 119 unsigned int connections_period; 120 121 u_int num_subsystems; 122 char *subsystem_name[MAX_SUBSYSTEMS]; 123 char *subsystem_command[MAX_SUBSYSTEMS]; 124 125 int max_startups_begin; 126 int max_startups_rate; 127 int max_startups; 128 char *banner; /* SSH-2 banner message */ 129 int reverse_mapping_check; /* cross-check ip and dns */ 130 int client_alive_interval; /* 131 * poke the client this often to 132 * see if it's still there 133 */ 134 int client_alive_count_max; /* 135 *If the client is unresponsive 136 * for this many intervals, above 137 * diconnect the session 138 */ 139 140 } ServerOptions; 141 /* 142 * Initializes the server options to special values that indicate that they 143 * have not yet been set. 144 */ 145 void initialize_server_options(ServerOptions * options); 146 147 /* 148 * Reads the server configuration file. This only sets the values for those 149 * options that have the special value indicating they have not been set. 150 */ 151 void read_server_config(ServerOptions * options, const char *filename); 152 153 /* Sets values for those values that have not yet been set. */ 154 void fill_default_server_options(ServerOptions * options); 155 156 #endif /* SERVCONF_H */ 157