crypto/openssh/readconf.h

   1 /* $OpenBSD: readconf.h,v 1.102 2014/07/15 15:54:14 millert 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  * Functions for reading the configuration file.
   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 READCONF_H
  17 #define READCONF_H
  18
  19 /* Data structure for representing option data. */
  20
  21 #define MAX_SEND_ENV            256
  22 #define SSH_MAX_HOSTS_FILES     32
  23 #define MAX_CANON_DOMAINS       32
  24 #define PATH_MAX_SUN            (sizeof((struct sockaddr_un *)0)->sun_path)
  25
  26 struct allowed_cname {
  27         char *source_list;
  28         char *target_list;
  29 };
  30
  31 typedef struct {
  32         int     forward_agent;  /* Forward authentication agent. */
  33         int     forward_x11;    /* Forward X11 display. */
  34         int     forward_x11_timeout;    /* Expiration for Cookies */
  35         int     forward_x11_trusted;    /* Trust Forward X11 display. */
  36         int     exit_on_forward_failure;        /* Exit if bind(2) fails for -L/-R */
  37         char   *xauth_location; /* Location for xauth program */
  38         struct ForwardOptions fwd_opts; /* forwarding options */
  39         int     use_privileged_port;    /* Don't use privileged port if false. */
  40         int     rhosts_rsa_authentication;      /* Try rhosts with RSA
  41                                                  * authentication. */
  42         int     rsa_authentication;     /* Try RSA authentication. */
  43         int     pubkey_authentication;  /* Try ssh2 pubkey authentication. */
  44         int     hostbased_authentication;       /* ssh2's rhosts_rsa */
  45         int     challenge_response_authentication;
  46                                         /* Try S/Key or TIS, authentication. */
  47         int     gss_authentication;     /* Try GSS authentication */
  48         int     gss_deleg_creds;        /* Delegate GSS credentials */
  49         int     password_authentication;        /* Try password
  50                                                  * authentication. */
  51         int     kbd_interactive_authentication; /* Try keyboard-interactive auth. */
  52         char    *kbd_interactive_devices; /* Keyboard-interactive auth devices. */
  53         int     batch_mode;     /* Batch mode: do not ask for passwords. */
  54         int     check_host_ip;  /* Also keep track of keys for IP address */
  55         int     strict_host_key_checking;       /* Strict host key checking. */
  56         int     compression;    /* Compress packets in both directions. */
  57         int     compression_level;      /* Compression level 1 (fast) to 9
  58                                          * (best). */
  59         int     tcp_keep_alive; /* Set SO_KEEPALIVE. */
  60         int     tcp_rcv_buf; /* user switch to set tcp recv buffer */
  61         int     tcp_rcv_buf_poll; /* Option to poll recv buf every window transfer */
  62         int     hpn_disabled;    /* Switch to disable HPN buffer management */
  63         int     hpn_buffer_size; /* User definable size for HPN buffer window */
  64         char    *version_addendum;      /* Appended to SSH banner */
  65         int     ip_qos_interactive;     /* IP ToS/DSCP/class for interactive */
  66         int     ip_qos_bulk;            /* IP ToS/DSCP/class for bulk traffic */
  67         LogLevel log_level;     /* Level for logging. */
  68
  69         int     port;           /* Port to connect. */
  70         int     address_family;
  71         int     connection_attempts;    /* Max attempts (seconds) before
  72                                          * giving up */
  73         int     connection_timeout;     /* Max time (seconds) before
  74                                          * aborting connection attempt */
  75         int     number_of_password_prompts;     /* Max number of password
  76                                                  * prompts. */
  77         int     cipher;         /* Cipher to use. */
  78         char   *ciphers;        /* SSH2 ciphers in order of preference. */
  79         char   *macs;           /* SSH2 macs in order of preference. */
  80         char   *hostkeyalgorithms;      /* SSH2 server key types in order of preference. */
  81         char   *kex_algorithms; /* SSH2 kex methods in order of preference. */
  82         int     protocol;       /* Protocol in order of preference. */
  83         char   *hostname;       /* Real host to connect. */
  84         char   *host_key_alias; /* hostname alias for .ssh/known_hosts */
  85         char   *proxy_command;  /* Proxy command for connecting the host. */
  86         char   *user;           /* User to log in as. */
  87         int     escape_char;    /* Escape character; -2 = none */
  88
  89         u_int   num_system_hostfiles;   /* Paths for /etc/ssh/ssh_known_hosts */
  90         char   *system_hostfiles[SSH_MAX_HOSTS_FILES];
  91         u_int   num_user_hostfiles;     /* Path for $HOME/.ssh/known_hosts */
  92         char   *user_hostfiles[SSH_MAX_HOSTS_FILES];
  93         char   *preferred_authentications;
  94         char   *bind_address;   /* local socket address for connection to sshd */
  95         char   *pkcs11_provider; /* PKCS#11 provider */
  96         int     verify_host_key_dns;    /* Verify host key using DNS */
  97
  98         int     num_identity_files;     /* Number of files for RSA/DSA identities. */
  99         char   *identity_files[SSH_MAX_IDENTITY_FILES];
 100         int    identity_file_userprovided[SSH_MAX_IDENTITY_FILES];
 101         Key    *identity_keys[SSH_MAX_IDENTITY_FILES];
 102
 103         /* Local TCP/IP forward requests. */
 104         int     num_local_forwards;
 105         struct Forward *local_forwards;
 106
 107         /* Remote TCP/IP forward requests. */
 108         int     num_remote_forwards;
 109         struct Forward *remote_forwards;
 110         int     clear_forwardings;
 111
 112         int     enable_ssh_keysign;
 113         int64_t rekey_limit;
 114         int     none_switch;    /* Use none cipher */
 115         int     none_enabled;   /* Allow none to be used */
 116         int     rekey_interval;
 117         int     no_host_authentication_for_localhost;
 118         int     identities_only;
 119         int     server_alive_interval;
 120         int     server_alive_count_max;
 121
 122         int     num_send_env;
 123         char   *send_env[MAX_SEND_ENV];
 124
 125         char    *control_path;
 126         int     control_master;
 127         int     control_persist; /* ControlPersist flag */
 128         int     control_persist_timeout; /* ControlPersist timeout (seconds) */
 129
 130         int     hash_known_hosts;
 131
 132         int     tun_open;       /* tun(4) */
 133         int     tun_local;      /* force tun device (optional) */
 134         int     tun_remote;     /* force tun device (optional) */
 135
 136         char    *local_command;
 137         int     permit_local_command;
 138         int     visual_host_key;
 139
 140         int     use_roaming;
 141
 142         int     request_tty;
 143
 144         int     proxy_use_fdpass;
 145
 146         int     num_canonical_domains;
 147         char    *canonical_domains[MAX_CANON_DOMAINS];
 148         int     canonicalize_hostname;
 149         int     canonicalize_max_dots;
 150         int     canonicalize_fallback_local;
 151         int     num_permitted_cnames;
 152         struct allowed_cname permitted_cnames[MAX_CANON_DOMAINS];
 153
 154         char    *ignored_unknown; /* Pattern list of unknown tokens to ignore */
 155 }       Options;
 156
 157 #define SSH_CANONICALISE_NO     0
 158 #define SSH_CANONICALISE_YES    1
 159 #define SSH_CANONICALISE_ALWAYS 2
 160
 161 #define SSHCTL_MASTER_NO        0
 162 #define SSHCTL_MASTER_YES       1
 163 #define SSHCTL_MASTER_AUTO      2
 164 #define SSHCTL_MASTER_ASK       3
 165 #define SSHCTL_MASTER_AUTO_ASK  4
 166
 167 #define REQUEST_TTY_AUTO        0
 168 #define REQUEST_TTY_NO          1
 169 #define REQUEST_TTY_YES         2
 170 #define REQUEST_TTY_FORCE       3
 171
 172 #define SSHCONF_CHECKPERM       1  /* check permissions on config file */
 173 #define SSHCONF_USERCONF        2  /* user provided config file not system */
 174
 175 void     initialize_options(Options *);
 176 void     fill_default_options(Options *);
 177 void     fill_default_options_for_canonicalization(Options *);
 178 int      process_config_line(Options *, struct passwd *, const char *, char *,
 179     const char *, int, int *, int);
 180 int      read_config_file(const char *, struct passwd *, const char *,
 181     Options *, int);
 182 int      parse_forward(struct Forward *, const char *, int, int);
 183 int      default_ssh_port(void);
 184 int      option_clear_or_none(const char *);
 185
 186 void     add_local_forward(Options *, const struct Forward *);
 187 void     add_remote_forward(Options *, const struct Forward *);
 188 void     add_identity_file(Options *, const char *, const char *, int);
 189
 190 #endif                          /* READCONF_H */