servconf.h

   1 /* $OpenBSD: servconf.h,v 1.94 2010/09/22 05:01:29 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         char   *ciphers;        /* Supported SSH2 ciphers. */
  74         char   *macs;           /* Supported SSH2 macs. */
  75         char   *kex_algorithms; /* SSH2 kex methods in order of preference. */
  76         int     protocol;       /* Supported protocol versions. */
  77         int     gateway_ports;  /* If true, allow remote connects to forwarded ports. */
  78         SyslogFacility log_facility;    /* Facility for system logging. */
  79         LogLevel log_level;     /* Level for system logging. */
  80         int     rhosts_rsa_authentication;      /* If true, permit rhosts RSA
  81                                                  * authentication. */
  82         int     hostbased_authentication;       /* If true, permit ssh2 hostbased auth */
  83         int     hostbased_uses_name_from_packet_only; /* experimental */
  84         int     rsa_authentication;     /* If true, permit RSA authentication. */
  85         int     pubkey_authentication;  /* If true, permit ssh2 pubkey authentication. */
  86         int     kerberos_authentication;        /* If true, permit Kerberos
  87                                                  * authentication. */
  88         int     kerberos_or_local_passwd;       /* If true, permit kerberos
  89                                                  * and any other password
  90                                                  * authentication mechanism,
  91                                                  * such as SecurID or
  92                                                  * /etc/passwd */
  93         int     kerberos_ticket_cleanup;        /* If true, destroy ticket
  94                                                  * file on logout. */
  95         int     kerberos_get_afs_token;         /* If true, try to get AFS token if
  96                                                  * authenticated with Kerberos. */
  97         int     gss_authentication;     /* If true, permit GSSAPI authentication */
  98         int     gss_cleanup_creds;      /* If true, destroy cred cache on logout */
  99         int     password_authentication;        /* If true, permit password
 100                                                  * authentication. */
 101         int     kbd_interactive_authentication; /* If true, permit */
 102         int     challenge_response_authentication;
 103         int     zero_knowledge_password_authentication;
 104                                         /* If true, permit jpake auth */
 105         int     permit_empty_passwd;    /* If false, do not permit empty
 106                                          * passwords. */
 107         int     permit_user_env;        /* If true, read ~/.ssh/environment */
 108         int     use_login;      /* If true, login(1) is used */
 109         int     compression;    /* If true, compression is allowed */
 110         int     allow_tcp_forwarding;
 111         int     allow_agent_forwarding;
 112         u_int num_allow_users;
 113         char   *allow_users[MAX_ALLOW_USERS];
 114         u_int num_deny_users;
 115         char   *deny_users[MAX_DENY_USERS];
 116         u_int num_allow_groups;
 117         char   *allow_groups[MAX_ALLOW_GROUPS];
 118         u_int num_deny_groups;
 119         char   *deny_groups[MAX_DENY_GROUPS];
 120
 121         u_int num_subsystems;
 122         char   *subsystem_name[MAX_SUBSYSTEMS];
 123         char   *subsystem_command[MAX_SUBSYSTEMS];
 124         char   *subsystem_args[MAX_SUBSYSTEMS];
 125
 126         u_int num_accept_env;
 127         char   *accept_env[MAX_ACCEPT_ENV];
 128
 129         int     max_startups_begin;
 130         int     max_startups_rate;
 131         int     max_startups;
 132         int     max_authtries;
 133         int     max_sessions;
 134         char   *banner;                 /* SSH-2 banner message */
 135         int     use_dns;
 136         int     client_alive_interval;  /*
 137                                          * poke the client this often to
 138                                          * see if it's still there
 139                                          */
 140         int     client_alive_count_max; /*
 141                                          * If the client is unresponsive
 142                                          * for this many intervals above,
 143                                          * disconnect the session
 144                                          */
 145
 146         char   *authorized_keys_file;   /* File containing public keys */
 147         char   *authorized_keys_file2;
 148
 149         char   *adm_forced_command;
 150
 151         int     use_pam;                /* Enable auth via PAM */
 152
 153         int     permit_tun;
 154
 155         int     num_permitted_opens;
 156
 157         char   *chroot_directory;
 158         char   *revoked_keys_file;
 159         char   *trusted_user_ca_keys;
 160         char   *authorized_principals_file;
 161 }       ServerOptions;
 162
 163 void     initialize_server_options(ServerOptions *);
 164 void     fill_default_server_options(ServerOptions *);
 165 int      process_server_config_line(ServerOptions *, char *, const char *, int,
 166              int *, const char *, const char *, const char *);
 167 void     load_server_config(const char *, Buffer *);
 168 void     parse_server_config(ServerOptions *, const char *, Buffer *,
 169              const char *, const char *, const char *);
 170 void     parse_server_match_config(ServerOptions *, const char *, const char *,
 171              const char *);
 172 void     copy_set_server_options(ServerOptions *, ServerOptions *, int);
 173 void     dump_config(ServerOptions *);
 174 char    *derelativise_path(const char *);
 175
 176 #endif                          /* SERVCONF_H */