1 /* $OpenBSD: servconf.h,v 1.99 2011/06/22 21:57:01 djm Exp $ */ 2 3 /* 4 * Author: Tatu Ylonen <ylo (at) cs.hut.fi> 5 * Copyright (c) 1995 Tatu Ylonen <ylo (at) 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 #define MAX_AUTHKEYS_FILES 256 /* Max # of authorized_keys files. */ 31 32 /* permit_root_login */ 33 #define PERMIT_NOT_SET -1 34 #define PERMIT_NO 0 35 #define PERMIT_FORCED_ONLY 1 36 #define PERMIT_NO_PASSWD 2 37 #define PERMIT_YES 3 38 39 /* use_privsep */ 40 #define PRIVSEP_OFF 0 41 #define PRIVSEP_ON 1 42 #define PRIVSEP_SANDBOX 2 43 44 #define DEFAULT_AUTH_FAIL_MAX 6 /* Default for MaxAuthTries */ 45 #define DEFAULT_SESSIONS_MAX 10 /* Default for MaxSessions */ 46 47 /* Magic name for internal sftp-server */ 48 #define INTERNAL_SFTP_NAME "internal-sftp" 49 50 typedef struct { 51 u_int num_ports; 52 u_int ports_from_cmdline; 53 int ports[MAX_PORTS]; /* Port number to listen on. */ 54 char *listen_addr; /* Address on which the server listens. */ 55 struct addrinfo *listen_addrs; /* Addresses on which the server listens. */ 56 int address_family; /* Address family used by the server. */ 57 char *host_key_files[MAX_HOSTKEYS]; /* Files containing host keys. */ 58 int num_host_key_files; /* Number of files for host keys. */ 59 char *host_cert_files[MAX_HOSTCERTS]; /* Files containing host certs. */ 60 int num_host_cert_files; /* Number of files for host certs. */ 61 char *pid_file; /* Where to put our pid */ 62 int server_key_bits;/* Size of the server key. */ 63 int login_grace_time; /* Disconnect if no auth in this time 64 * (sec). */ 65 int key_regeneration_time; /* Server key lifetime (seconds). */ 66 int permit_root_login; /* PERMIT_*, see above */ 67 int ignore_rhosts; /* Ignore .rhosts and .shosts. */ 68 int ignore_user_known_hosts; /* Ignore ~/.ssh/known_hosts 69 * for RhostsRsaAuth */ 70 int print_motd; /* If true, print /etc/motd. */ 71 int print_lastlog; /* If true, print lastlog */ 72 int x11_forwarding; /* If true, permit inet (spoofing) X11 fwd. */ 73 int x11_display_offset; /* What DISPLAY number to start 74 * searching at */ 75 int x11_use_localhost; /* If true, use localhost for fake X11 server. */ 76 char *xauth_location; /* Location of xauth program */ 77 int strict_modes; /* If true, require string home dir modes. */ 78 int tcp_keep_alive; /* If true, set SO_KEEPALIVE. */ 79 int ip_qos_interactive; /* IP ToS/DSCP/class for interactive */ 80 int ip_qos_bulk; /* IP ToS/DSCP/class for bulk traffic */ 81 char *ciphers; /* Supported SSH2 ciphers. */ 82 char *macs; /* Supported SSH2 macs. */ 83 char *kex_algorithms; /* SSH2 kex methods in order of preference. */ 84 int protocol; /* Supported protocol versions. */ 85 int gateway_ports; /* If true, allow remote connects to forwarded ports. */ 86 SyslogFacility log_facility; /* Facility for system logging. */ 87 LogLevel log_level; /* Level for system logging. */ 88 int rhosts_rsa_authentication; /* If true, permit rhosts RSA 89 * authentication. */ 90 int hostbased_authentication; /* If true, permit ssh2 hostbased auth */ 91 int hostbased_uses_name_from_packet_only; /* experimental */ 92 int rsa_authentication; /* If true, permit RSA authentication. */ 93 int pubkey_authentication; /* If true, permit ssh2 pubkey authentication. */ 94 int kerberos_authentication; /* If true, permit Kerberos 95 * authentication. */ 96 int kerberos_or_local_passwd; /* If true, permit kerberos 97 * and any other password 98 * authentication mechanism, 99 * such as SecurID or 100 * /etc/passwd */ 101 int kerberos_ticket_cleanup; /* If true, destroy ticket 102 * file on logout. */ 103 int kerberos_get_afs_token; /* If true, try to get AFS token if 104 * authenticated with Kerberos. */ 105 int gss_authentication; /* If true, permit GSSAPI authentication */ 106 int gss_cleanup_creds; /* If true, destroy cred cache on logout */ 107 int password_authentication; /* If true, permit password 108 * authentication. */ 109 int kbd_interactive_authentication; /* If true, permit */ 110 int challenge_response_authentication; 111 int zero_knowledge_password_authentication; 112 /* If true, permit jpake auth */ 113 int permit_empty_passwd; /* If false, do not permit empty 114 * passwords. */ 115 int permit_user_env; /* If true, read ~/.ssh/environment */ 116 int use_login; /* If true, login(1) is used */ 117 int compression; /* If true, compression is allowed */ 118 int allow_tcp_forwarding; 119 int allow_agent_forwarding; 120 u_int num_allow_users; 121 char *allow_users[MAX_ALLOW_USERS]; 122 u_int num_deny_users; 123 char *deny_users[MAX_DENY_USERS]; 124 u_int num_allow_groups; 125 char *allow_groups[MAX_ALLOW_GROUPS]; 126 u_int num_deny_groups; 127 char *deny_groups[MAX_DENY_GROUPS]; 128 129 u_int num_subsystems; 130 char *subsystem_name[MAX_SUBSYSTEMS]; 131 char *subsystem_command[MAX_SUBSYSTEMS]; 132 char *subsystem_args[MAX_SUBSYSTEMS]; 133 134 u_int num_accept_env; 135 char *accept_env[MAX_ACCEPT_ENV]; 136 137 int max_startups_begin; 138 int max_startups_rate; 139 int max_startups; 140 int max_authtries; 141 int max_sessions; 142 char *banner; /* SSH-2 banner message */ 143 int use_dns; 144 int client_alive_interval; /* 145 * poke the client this often to 146 * see if it's still there 147 */ 148 int client_alive_count_max; /* 149 * If the client is unresponsive 150 * for this many intervals above, 151 * disconnect the session 152 */ 153 154 u_int num_authkeys_files; /* Files containing public keys */ 155 char *authorized_keys_files[MAX_AUTHKEYS_FILES]; 156 157 char *adm_forced_command; 158 159 int use_pam; /* Enable auth via PAM */ 160 161 int permit_tun; 162 163 int num_permitted_opens; 164 165 char *chroot_directory; 166 char *revoked_keys_file; 167 char *trusted_user_ca_keys; 168 char *authorized_principals_file; 169 } ServerOptions; 170 171 /* 172 * These are string config options that must be copied between the 173 * Match sub-config and the main config, and must be sent from the 174 * privsep slave to the privsep master. We use a macro to ensure all 175 * the options are copied and the copies are done in the correct order. 176 */ 177 #define COPY_MATCH_STRING_OPTS() do { \ 178 M_CP_STROPT(banner); \ 179 M_CP_STROPT(trusted_user_ca_keys); \ 180 M_CP_STROPT(revoked_keys_file); \ 181 M_CP_STROPT(authorized_principals_file); \ 182 M_CP_STRARRAYOPT(authorized_keys_files, num_authkeys_files); \ 183 } while (0) 184 185 void initialize_server_options(ServerOptions *); 186 void fill_default_server_options(ServerOptions *); 187 int process_server_config_line(ServerOptions *, char *, const char *, int, 188 int *, const char *, const char *, const char *); 189 void load_server_config(const char *, Buffer *); 190 void parse_server_config(ServerOptions *, const char *, Buffer *, 191 const char *, const char *, const char *); 192 void parse_server_match_config(ServerOptions *, const char *, const char *, 193 const char *); 194 void copy_set_server_options(ServerOptions *, ServerOptions *, int); 195 void dump_config(ServerOptions *); 196 char *derelativise_path(const char *); 197 198 #endif /* SERVCONF_H */ 199
