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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
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
28/* permit_root_login */
29#define PERMIT_NOT_SET -1
30#define PERMIT_NO 0
31#define PERMIT_FORCED_ONLY 1
32#define PERMIT_NO_PASSWD 2
33#define PERMIT_YES 3
34
35
36typedef struct {
37 u_int num_ports;
38 u_int ports_from_cmdline;
39 u_short ports[MAX_PORTS]; /* Port number to listen on. */
40 char *listen_addr; /* Address on which the server listens. */
41 struct addrinfo *listen_addrs; /* Addresses on which the server listens. */
42 char *host_key_files[MAX_HOSTKEYS]; /* Files containing host keys. */
43 int num_host_key_files; /* Number of files for host keys. */
44 char *pid_file; /* Where to put our pid */
45 int server_key_bits;/* Size of the server key. */
46 int login_grace_time; /* Disconnect if no auth in this time
47 * (sec). */
48 int key_regeneration_time; /* Server key lifetime (seconds). */
49 int permit_root_login; /* PERMIT_*, see above */
50 int ignore_rhosts; /* Ignore .rhosts and .shosts. */
51 int ignore_user_known_hosts; /* Ignore ~/.ssh/known_hosts
52 * for RhostsRsaAuth */
53 int print_motd; /* If true, print /etc/motd. */
54 int print_lastlog; /* If true, print lastlog */
55 int check_mail; /* If true, check for new mail. */
56 int x11_forwarding; /* If true, permit inet (spoofing) X11 fwd. */
57 int x11_display_offset; /* What DISPLAY number to start
58 * searching at */
59 char *xauth_location; /* Location of xauth program */
60 int strict_modes; /* If true, require string home dir modes. */
61 int keepalives; /* If true, set SO_KEEPALIVE. */
62 char *ciphers; /* Supported SSH2 ciphers. */
63 char *macs; /* Supported SSH2 macs. */
64 int protocol; /* Supported protocol versions. */
65 int gateway_ports; /* If true, allow remote connects to forwarded ports. */
66 SyslogFacility log_facility; /* Facility for system logging. */
67 LogLevel log_level; /* Level for system logging. */
68 int rhosts_authentication; /* If true, permit rhosts
69 * authentication. */
70 int rhosts_rsa_authentication; /* If true, permit rhosts RSA
71 * authentication. */
72 int hostbased_authentication; /* If true, permit ssh2 hostbased auth */
73 int hostbased_uses_name_from_packet_only; /* experimental */
74 int rsa_authentication; /* If true, permit RSA authentication. */
75 int pubkey_authentication; /* If true, permit ssh2 pubkey authentication. */
76#ifdef KRB4
77 int kerberos_authentication; /* If true, permit Kerberos
78 * authentication. */
79 int kerberos_or_local_passwd; /* If true, permit kerberos
80 * and any other password
81 * authentication mechanism,
82 * such as SecurID or
83 * /etc/passwd */
84 int kerberos_ticket_cleanup; /* If true, destroy ticket
85 * file on logout. */
86#endif
87#ifdef AFS
88 int kerberos_tgt_passing; /* If true, permit Kerberos tgt
89 * passing. */
90 int afs_token_passing; /* If true, permit AFS token passing. */
91#endif
92 int password_authentication; /* If true, permit password
93 * authentication. */
94 int kbd_interactive_authentication; /* If true, permit */
95 int challenge_reponse_authentication;
96 int permit_empty_passwd; /* If false, do not permit empty
97 * passwords. */
98 int use_login; /* If true, login(1) is used */
99 int allow_tcp_forwarding;
100 u_int num_allow_users;
101 char *allow_users[MAX_ALLOW_USERS];
102 u_int num_deny_users;
103 char *deny_users[MAX_DENY_USERS];
104 u_int num_allow_groups;
105 char *allow_groups[MAX_ALLOW_GROUPS];
106 u_int num_deny_groups;
107 char *deny_groups[MAX_DENY_GROUPS];
108
109 u_int num_subsystems;
110 char *subsystem_name[MAX_SUBSYSTEMS];
111 char *subsystem_command[MAX_SUBSYSTEMS];
112
113 int max_startups_begin;
114 int max_startups_rate;
115 int max_startups;
116 char *banner; /* SSH-2 banner message */
117 int reverse_mapping_check; /* cross-check ip and dns */
118 int client_alive_interval; /*
119 * poke the client this often to
120 * see if it's still there
121 */
122 int client_alive_count_max; /*
123 *If the client is unresponsive
124 * for this many intervals, above
125 * diconnect the session
126 */
127 int pam_authentication_via_kbd_int;
128} ServerOptions;
129/*
130 * Initializes the server options to special values that indicate that they
131 * have not yet been set.
132 */
133void initialize_server_options(ServerOptions * options);
134
135/*
136 * Reads the server configuration file. This only sets the values for those
137 * options that have the special value indicating they have not been set.
138 */
139void read_server_config(ServerOptions * options, const char *filename);
140
141/* Sets values for those values that have not yet been set. */
142void fill_default_server_options(ServerOptions * options);
143
144#endif /* SERVCONF_H */