Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1 | |
| 2 | /* $OpenBSD: servconf.c,v 1.260 2015/02/02 01:57:44 deraadt Exp $ */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 3 | /* |
| 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 5 | * All rights reserved |
| 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 | #include "includes.h" |
| 15 | |
| 16 | #include <sys/types.h> |
| 17 | #include <sys/socket.h> |
| 18 | |
| 19 | #include <netinet/in.h> |
| 20 | #include <netinet/in_systm.h> |
| 21 | #include <netinet/ip.h> |
| 22 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 23 | #include <ctype.h> |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 24 | #include <netdb.h> |
| 25 | #include <pwd.h> |
| 26 | #include <stdio.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <string.h> |
| 29 | #include <signal.h> |
| 30 | #include <unistd.h> |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 31 | #include <limits.h> |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 32 | #include <stdarg.h> |
| 33 | #include <errno.h> |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 34 | #ifdef HAVE_UTIL_H |
| 35 | #include <util.h> |
| 36 | #endif |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 37 | |
| 38 | #include "openbsd-compat/sys-queue.h" |
| 39 | #include "xmalloc.h" |
| 40 | #include "ssh.h" |
| 41 | #include "log.h" |
| 42 | #include "buffer.h" |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 43 | #include "misc.h" |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 44 | #include "servconf.h" |
| 45 | #include "compat.h" |
| 46 | #include "pathnames.h" |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 47 | #include "cipher.h" |
| 48 | #include "key.h" |
| 49 | #include "kex.h" |
| 50 | #include "mac.h" |
| 51 | #include "match.h" |
| 52 | #include "channels.h" |
| 53 | #include "groupaccess.h" |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 54 | #include "canohost.h" |
| 55 | #include "packet.h" |
| 56 | #include "hostfile.h" |
| 57 | #include "auth.h" |
| 58 | #include "myproposal.h" |
| 59 | #include "digest.h" |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 60 | |
| 61 | #ifdef ANDROID |
| 62 | #include <cutils/properties.h> |
| 63 | #endif |
| 64 | |
| 65 | static void add_listen_addr(ServerOptions *, char *, int); |
| 66 | static void add_one_listen_addr(ServerOptions *, char *, int); |
| 67 | |
| 68 | /* Use of privilege separation or not */ |
| 69 | extern int use_privsep; |
| 70 | extern Buffer cfg; |
| 71 | |
| 72 | /* Initializes the server options to their default values. */ |
| 73 | |
| 74 | void |
| 75 | initialize_server_options(ServerOptions *options) |
| 76 | { |
| 77 | memset(options, 0, sizeof(*options)); |
| 78 | |
| 79 | /* Portable-specific options */ |
| 80 | options->use_pam = -1; |
| 81 | |
| 82 | /* Standard Options */ |
| 83 | options->num_ports = 0; |
| 84 | options->ports_from_cmdline = 0; |
| 85 | options->listen_addrs = NULL; |
| 86 | options->address_family = -1; |
| 87 | options->num_host_key_files = 0; |
| 88 | options->num_host_cert_files = 0; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 89 | options->host_key_agent = NULL; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 90 | options->pid_file = NULL; |
| 91 | options->server_key_bits = -1; |
| 92 | options->login_grace_time = -1; |
| 93 | options->key_regeneration_time = -1; |
| 94 | options->permit_root_login = PERMIT_NOT_SET; |
| 95 | options->ignore_rhosts = -1; |
| 96 | options->ignore_user_known_hosts = -1; |
| 97 | options->print_motd = -1; |
| 98 | options->print_lastlog = -1; |
| 99 | options->x11_forwarding = -1; |
| 100 | options->x11_display_offset = -1; |
| 101 | options->x11_use_localhost = -1; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 102 | options->permit_tty = -1; |
| 103 | options->permit_user_rc = -1; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 104 | options->xauth_location = NULL; |
| 105 | options->strict_modes = -1; |
| 106 | options->tcp_keep_alive = -1; |
| 107 | options->log_facility = SYSLOG_FACILITY_NOT_SET; |
| 108 | options->log_level = SYSLOG_LEVEL_NOT_SET; |
| 109 | options->rhosts_rsa_authentication = -1; |
| 110 | options->hostbased_authentication = -1; |
| 111 | options->hostbased_uses_name_from_packet_only = -1; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 112 | options->hostbased_key_types = NULL; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 113 | options->rsa_authentication = -1; |
| 114 | options->pubkey_authentication = -1; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 115 | options->pubkey_key_types = NULL; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 116 | options->kerberos_authentication = -1; |
| 117 | options->kerberos_or_local_passwd = -1; |
| 118 | options->kerberos_ticket_cleanup = -1; |
| 119 | options->kerberos_get_afs_token = -1; |
| 120 | options->gss_authentication=-1; |
| 121 | options->gss_cleanup_creds = -1; |
| 122 | options->password_authentication = -1; |
| 123 | options->kbd_interactive_authentication = -1; |
| 124 | options->challenge_response_authentication = -1; |
| 125 | options->permit_empty_passwd = -1; |
| 126 | options->permit_user_env = -1; |
| 127 | options->use_login = -1; |
| 128 | options->compression = -1; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 129 | options->rekey_limit = -1; |
| 130 | options->rekey_interval = -1; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 131 | options->allow_tcp_forwarding = -1; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 132 | options->allow_streamlocal_forwarding = -1; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 133 | options->allow_agent_forwarding = -1; |
| 134 | options->num_allow_users = 0; |
| 135 | options->num_deny_users = 0; |
| 136 | options->num_allow_groups = 0; |
| 137 | options->num_deny_groups = 0; |
| 138 | options->ciphers = NULL; |
| 139 | options->macs = NULL; |
| 140 | options->kex_algorithms = NULL; |
| 141 | options->protocol = SSH_PROTO_UNKNOWN; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 142 | options->fwd_opts.gateway_ports = -1; |
| 143 | options->fwd_opts.streamlocal_bind_mask = (mode_t)-1; |
| 144 | options->fwd_opts.streamlocal_bind_unlink = -1; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 145 | options->num_subsystems = 0; |
| 146 | options->max_startups_begin = -1; |
| 147 | options->max_startups_rate = -1; |
| 148 | options->max_startups = -1; |
| 149 | options->max_authtries = -1; |
| 150 | options->max_sessions = -1; |
| 151 | options->banner = NULL; |
| 152 | options->use_dns = -1; |
| 153 | options->client_alive_interval = -1; |
| 154 | options->client_alive_count_max = -1; |
| 155 | options->num_authkeys_files = 0; |
| 156 | options->num_accept_env = 0; |
| 157 | options->permit_tun = -1; |
| 158 | options->num_permitted_opens = -1; |
| 159 | options->adm_forced_command = NULL; |
| 160 | options->chroot_directory = NULL; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 161 | options->authorized_keys_command = NULL; |
| 162 | options->authorized_keys_command_user = NULL; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 163 | options->revoked_keys_file = NULL; |
| 164 | options->trusted_user_ca_keys = NULL; |
| 165 | options->authorized_principals_file = NULL; |
| 166 | options->ip_qos_interactive = -1; |
| 167 | options->ip_qos_bulk = -1; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 168 | options->version_addendum = NULL; |
| 169 | options->fingerprint_hash = -1; |
| 170 | } |
| 171 | |
| 172 | /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */ |
| 173 | static int |
| 174 | option_clear_or_none(const char *o) |
| 175 | { |
| 176 | return o == NULL || strcasecmp(o, "none") == 0; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | void |
| 180 | fill_default_server_options(ServerOptions *options) |
| 181 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 182 | int i; |
| 183 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 184 | /* Portable-specific options */ |
| 185 | if (options->use_pam == -1) |
| 186 | options->use_pam = 0; |
| 187 | |
| 188 | /* Standard Options */ |
| 189 | if (options->protocol == SSH_PROTO_UNKNOWN) |
| 190 | options->protocol = SSH_PROTO_2; |
| 191 | if (options->num_host_key_files == 0) { |
| 192 | /* fill default hostkeys for protocols */ |
| 193 | if (options->protocol & SSH_PROTO_1) |
| 194 | options->host_key_files[options->num_host_key_files++] = |
| 195 | _PATH_HOST_KEY_FILE; |
| 196 | if (options->protocol & SSH_PROTO_2) { |
| 197 | options->host_key_files[options->num_host_key_files++] = |
| 198 | _PATH_HOST_RSA_KEY_FILE; |
| 199 | options->host_key_files[options->num_host_key_files++] = |
| 200 | _PATH_HOST_DSA_KEY_FILE; |
| 201 | #ifdef OPENSSL_HAS_ECC |
| 202 | options->host_key_files[options->num_host_key_files++] = |
| 203 | _PATH_HOST_ECDSA_KEY_FILE; |
| 204 | #endif |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 205 | options->host_key_files[options->num_host_key_files++] = |
| 206 | _PATH_HOST_ED25519_KEY_FILE; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 207 | } |
| 208 | } |
| 209 | /* No certificates by default */ |
| 210 | if (options->num_ports == 0) |
| 211 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; |
| 212 | if (options->listen_addrs == NULL) |
| 213 | add_listen_addr(options, NULL, 0); |
| 214 | if (options->pid_file == NULL) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 215 | options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 216 | if (options->server_key_bits == -1) |
| 217 | options->server_key_bits = 1024; |
| 218 | if (options->login_grace_time == -1) |
| 219 | options->login_grace_time = 120; |
| 220 | if (options->key_regeneration_time == -1) |
| 221 | options->key_regeneration_time = 3600; |
| 222 | if (options->permit_root_login == PERMIT_NOT_SET) |
| 223 | options->permit_root_login = PERMIT_YES; |
| 224 | if (options->ignore_rhosts == -1) |
| 225 | options->ignore_rhosts = 1; |
| 226 | if (options->ignore_user_known_hosts == -1) |
| 227 | options->ignore_user_known_hosts = 0; |
| 228 | if (options->print_motd == -1) |
| 229 | options->print_motd = 1; |
| 230 | if (options->print_lastlog == -1) |
| 231 | options->print_lastlog = 1; |
| 232 | if (options->x11_forwarding == -1) |
| 233 | options->x11_forwarding = 0; |
| 234 | if (options->x11_display_offset == -1) |
| 235 | options->x11_display_offset = 10; |
| 236 | if (options->x11_use_localhost == -1) |
| 237 | options->x11_use_localhost = 1; |
| 238 | if (options->xauth_location == NULL) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 239 | options->xauth_location = xstrdup(_PATH_XAUTH); |
| 240 | if (options->permit_tty == -1) |
| 241 | options->permit_tty = 1; |
| 242 | if (options->permit_user_rc == -1) |
| 243 | options->permit_user_rc = 1; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 244 | if (options->strict_modes == -1) |
| 245 | options->strict_modes = 1; |
| 246 | if (options->tcp_keep_alive == -1) |
| 247 | options->tcp_keep_alive = 1; |
| 248 | if (options->log_facility == SYSLOG_FACILITY_NOT_SET) |
| 249 | options->log_facility = SYSLOG_FACILITY_AUTH; |
| 250 | if (options->log_level == SYSLOG_LEVEL_NOT_SET) |
| 251 | options->log_level = SYSLOG_LEVEL_INFO; |
| 252 | if (options->rhosts_rsa_authentication == -1) |
| 253 | options->rhosts_rsa_authentication = 0; |
| 254 | if (options->hostbased_authentication == -1) |
| 255 | options->hostbased_authentication = 0; |
| 256 | if (options->hostbased_uses_name_from_packet_only == -1) |
| 257 | options->hostbased_uses_name_from_packet_only = 0; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 258 | if (options->hostbased_key_types == NULL) |
| 259 | options->hostbased_key_types = xstrdup("*"); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 260 | if (options->rsa_authentication == -1) |
| 261 | options->rsa_authentication = 1; |
| 262 | if (options->pubkey_authentication == -1) |
| 263 | options->pubkey_authentication = 1; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 264 | if (options->pubkey_key_types == NULL) |
| 265 | options->pubkey_key_types = xstrdup("*"); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 266 | if (options->kerberos_authentication == -1) |
| 267 | options->kerberos_authentication = 0; |
| 268 | if (options->kerberos_or_local_passwd == -1) |
| 269 | options->kerberos_or_local_passwd = 1; |
| 270 | if (options->kerberos_ticket_cleanup == -1) |
| 271 | options->kerberos_ticket_cleanup = 1; |
| 272 | if (options->kerberos_get_afs_token == -1) |
| 273 | options->kerberos_get_afs_token = 0; |
| 274 | if (options->gss_authentication == -1) |
| 275 | options->gss_authentication = 0; |
| 276 | if (options->gss_cleanup_creds == -1) |
| 277 | options->gss_cleanup_creds = 1; |
| 278 | if (options->password_authentication == -1) |
| 279 | options->password_authentication = 1; |
| 280 | if (options->kbd_interactive_authentication == -1) |
| 281 | options->kbd_interactive_authentication = 0; |
| 282 | if (options->challenge_response_authentication == -1) |
| 283 | options->challenge_response_authentication = 1; |
| 284 | if (options->permit_empty_passwd == -1) |
| 285 | options->permit_empty_passwd = 0; |
| 286 | if (options->permit_user_env == -1) |
| 287 | options->permit_user_env = 0; |
| 288 | if (options->use_login == -1) |
| 289 | options->use_login = 0; |
| 290 | if (options->compression == -1) |
| 291 | options->compression = COMP_DELAYED; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 292 | if (options->rekey_limit == -1) |
| 293 | options->rekey_limit = 0; |
| 294 | if (options->rekey_interval == -1) |
| 295 | options->rekey_interval = 0; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 296 | if (options->allow_tcp_forwarding == -1) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 297 | options->allow_tcp_forwarding = FORWARD_ALLOW; |
| 298 | if (options->allow_streamlocal_forwarding == -1) |
| 299 | options->allow_streamlocal_forwarding = FORWARD_ALLOW; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 300 | if (options->allow_agent_forwarding == -1) |
| 301 | options->allow_agent_forwarding = 1; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 302 | if (options->fwd_opts.gateway_ports == -1) |
| 303 | options->fwd_opts.gateway_ports = 0; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 304 | if (options->max_startups == -1) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 305 | options->max_startups = 100; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 306 | if (options->max_startups_rate == -1) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 307 | options->max_startups_rate = 30; /* 30% */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 308 | if (options->max_startups_begin == -1) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 309 | options->max_startups_begin = 10; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 310 | if (options->max_authtries == -1) |
| 311 | options->max_authtries = DEFAULT_AUTH_FAIL_MAX; |
| 312 | if (options->max_sessions == -1) |
| 313 | options->max_sessions = DEFAULT_SESSIONS_MAX; |
| 314 | if (options->use_dns == -1) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 315 | options->use_dns = 0; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 316 | if (options->client_alive_interval == -1) |
| 317 | options->client_alive_interval = 0; |
| 318 | if (options->client_alive_count_max == -1) |
| 319 | options->client_alive_count_max = 3; |
| 320 | if (options->num_authkeys_files == 0) { |
| 321 | options->authorized_keys_files[options->num_authkeys_files++] = |
| 322 | xstrdup(_PATH_SSH_USER_PERMITTED_KEYS); |
| 323 | options->authorized_keys_files[options->num_authkeys_files++] = |
| 324 | xstrdup(_PATH_SSH_USER_PERMITTED_KEYS2); |
| 325 | } |
| 326 | if (options->permit_tun == -1) |
| 327 | options->permit_tun = SSH_TUNMODE_NO; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 328 | if (options->ip_qos_interactive == -1) |
| 329 | options->ip_qos_interactive = IPTOS_LOWDELAY; |
| 330 | if (options->ip_qos_bulk == -1) |
| 331 | options->ip_qos_bulk = IPTOS_THROUGHPUT; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 332 | if (options->version_addendum == NULL) |
| 333 | options->version_addendum = xstrdup(""); |
| 334 | if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1) |
| 335 | options->fwd_opts.streamlocal_bind_mask = 0177; |
| 336 | if (options->fwd_opts.streamlocal_bind_unlink == -1) |
| 337 | options->fwd_opts.streamlocal_bind_unlink = 0; |
| 338 | if (options->fingerprint_hash == -1) |
| 339 | options->fingerprint_hash = SSH_FP_HASH_DEFAULT; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 340 | /* Turn privilege separation on by default */ |
| 341 | if (use_privsep == -1) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 342 | use_privsep = PRIVSEP_NOSANDBOX; |
| 343 | |
| 344 | #define CLEAR_ON_NONE(v) \ |
| 345 | do { \ |
| 346 | if (option_clear_or_none(v)) { \ |
| 347 | free(v); \ |
| 348 | v = NULL; \ |
| 349 | } \ |
| 350 | } while(0) |
| 351 | CLEAR_ON_NONE(options->pid_file); |
| 352 | CLEAR_ON_NONE(options->xauth_location); |
| 353 | CLEAR_ON_NONE(options->banner); |
| 354 | CLEAR_ON_NONE(options->trusted_user_ca_keys); |
| 355 | CLEAR_ON_NONE(options->revoked_keys_file); |
| 356 | for (i = 0; i < options->num_host_key_files; i++) |
| 357 | CLEAR_ON_NONE(options->host_key_files[i]); |
| 358 | for (i = 0; i < options->num_host_cert_files; i++) |
| 359 | CLEAR_ON_NONE(options->host_cert_files[i]); |
| 360 | #undef CLEAR_ON_NONE |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 361 | |
| 362 | #ifndef HAVE_MMAP |
| 363 | if (use_privsep && options->compression == 1) { |
| 364 | error("This platform does not support both privilege " |
| 365 | "separation and compression"); |
| 366 | error("Compression disabled"); |
| 367 | options->compression = 0; |
| 368 | } |
| 369 | #endif |
| 370 | |
| 371 | } |
| 372 | |
| 373 | /* Keyword tokens. */ |
| 374 | typedef enum { |
| 375 | sBadOption, /* == unknown option */ |
| 376 | /* Portable-specific options */ |
| 377 | sUsePAM, |
| 378 | /* Standard Options */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 379 | sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, |
| 380 | sKeyRegenerationTime, sPermitRootLogin, sLogFacility, sLogLevel, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 381 | sRhostsRSAAuthentication, sRSAAuthentication, |
| 382 | sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, |
| 383 | sKerberosGetAFSToken, |
| 384 | sKerberosTgtPassing, sChallengeResponseAuthentication, |
| 385 | sPasswordAuthentication, sKbdInteractiveAuthentication, |
| 386 | sListenAddress, sAddressFamily, |
| 387 | sPrintMotd, sPrintLastLog, sIgnoreRhosts, |
| 388 | sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 389 | sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 390 | sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 391 | sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 392 | sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 393 | sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedKeyTypes, |
| 394 | sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 395 | sBanner, sUseDNS, sHostbasedAuthentication, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 396 | sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedKeyTypes, |
| 397 | sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 398 | sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel, |
| 399 | sMatch, sPermitOpen, sForceCommand, sChrootDirectory, |
| 400 | sUsePrivilegeSeparation, sAllowAgentForwarding, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 401 | sHostCertificate, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 402 | sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 403 | sKexAlgorithms, sIPQoS, sVersionAddendum, |
| 404 | sAuthorizedKeysCommand, sAuthorizedKeysCommandUser, |
| 405 | sAuthenticationMethods, sHostKeyAgent, sPermitUserRC, |
| 406 | sStreamLocalBindMask, sStreamLocalBindUnlink, |
| 407 | sAllowStreamLocalForwarding, sFingerprintHash, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 408 | sDeprecated, sUnsupported |
| 409 | } ServerOpCodes; |
| 410 | |
| 411 | #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */ |
| 412 | #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */ |
| 413 | #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH) |
| 414 | |
| 415 | /* Textual representation of the tokens. */ |
| 416 | static struct { |
| 417 | const char *name; |
| 418 | ServerOpCodes opcode; |
| 419 | u_int flags; |
| 420 | } keywords[] = { |
| 421 | /* Portable-specific options */ |
| 422 | #ifdef USE_PAM |
| 423 | { "usepam", sUsePAM, SSHCFG_GLOBAL }, |
| 424 | #else |
| 425 | { "usepam", sUnsupported, SSHCFG_GLOBAL }, |
| 426 | #endif |
| 427 | { "pamauthenticationviakbdint", sDeprecated, SSHCFG_GLOBAL }, |
| 428 | /* Standard Options */ |
| 429 | { "port", sPort, SSHCFG_GLOBAL }, |
| 430 | { "hostkey", sHostKeyFile, SSHCFG_GLOBAL }, |
| 431 | { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 432 | { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL }, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 433 | { "pidfile", sPidFile, SSHCFG_GLOBAL }, |
| 434 | { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL }, |
| 435 | { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL }, |
| 436 | { "keyregenerationinterval", sKeyRegenerationTime, SSHCFG_GLOBAL }, |
| 437 | { "permitrootlogin", sPermitRootLogin, SSHCFG_ALL }, |
| 438 | { "syslogfacility", sLogFacility, SSHCFG_GLOBAL }, |
| 439 | { "loglevel", sLogLevel, SSHCFG_GLOBAL }, |
| 440 | { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL }, |
| 441 | { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_ALL }, |
| 442 | { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL }, |
| 443 | { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL }, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 444 | { "hostbasedacceptedkeytypes", sHostbasedAcceptedKeyTypes, SSHCFG_ALL }, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 445 | { "rsaauthentication", sRSAAuthentication, SSHCFG_ALL }, |
| 446 | { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL }, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 447 | { "pubkeyacceptedkeytypes", sPubkeyAcceptedKeyTypes, SSHCFG_ALL }, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 448 | { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */ |
| 449 | #ifdef KRB5 |
| 450 | { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL }, |
| 451 | { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL }, |
| 452 | { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL }, |
| 453 | #ifdef USE_AFS |
| 454 | { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL }, |
| 455 | #else |
| 456 | { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, |
| 457 | #endif |
| 458 | #else |
| 459 | { "kerberosauthentication", sUnsupported, SSHCFG_ALL }, |
| 460 | { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL }, |
| 461 | { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL }, |
| 462 | { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL }, |
| 463 | #endif |
| 464 | { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL }, |
| 465 | { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL }, |
| 466 | #ifdef GSSAPI |
| 467 | { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL }, |
| 468 | { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL }, |
| 469 | #else |
| 470 | { "gssapiauthentication", sUnsupported, SSHCFG_ALL }, |
| 471 | { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL }, |
| 472 | #endif |
| 473 | { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL }, |
| 474 | { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, |
| 475 | { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, |
| 476 | { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 477 | { "checkmail", sDeprecated, SSHCFG_GLOBAL }, |
| 478 | { "listenaddress", sListenAddress, SSHCFG_GLOBAL }, |
| 479 | { "addressfamily", sAddressFamily, SSHCFG_GLOBAL }, |
| 480 | { "printmotd", sPrintMotd, SSHCFG_GLOBAL }, |
| 481 | { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL }, |
| 482 | { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL }, |
| 483 | { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL }, |
| 484 | { "x11forwarding", sX11Forwarding, SSHCFG_ALL }, |
| 485 | { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL }, |
| 486 | { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL }, |
| 487 | { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL }, |
| 488 | { "strictmodes", sStrictModes, SSHCFG_GLOBAL }, |
| 489 | { "permitemptypasswords", sEmptyPasswd, SSHCFG_ALL }, |
| 490 | { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL }, |
| 491 | { "uselogin", sUseLogin, SSHCFG_GLOBAL }, |
| 492 | { "compression", sCompression, SSHCFG_GLOBAL }, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 493 | { "rekeylimit", sRekeyLimit, SSHCFG_ALL }, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 494 | { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, |
| 495 | { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */ |
| 496 | { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL }, |
| 497 | { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL }, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 498 | { "allowusers", sAllowUsers, SSHCFG_ALL }, |
| 499 | { "denyusers", sDenyUsers, SSHCFG_ALL }, |
| 500 | { "allowgroups", sAllowGroups, SSHCFG_ALL }, |
| 501 | { "denygroups", sDenyGroups, SSHCFG_ALL }, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 502 | { "ciphers", sCiphers, SSHCFG_GLOBAL }, |
| 503 | { "macs", sMacs, SSHCFG_GLOBAL }, |
| 504 | { "protocol", sProtocol, SSHCFG_GLOBAL }, |
| 505 | { "gatewayports", sGatewayPorts, SSHCFG_ALL }, |
| 506 | { "subsystem", sSubsystem, SSHCFG_GLOBAL }, |
| 507 | { "maxstartups", sMaxStartups, SSHCFG_GLOBAL }, |
| 508 | { "maxauthtries", sMaxAuthTries, SSHCFG_ALL }, |
| 509 | { "maxsessions", sMaxSessions, SSHCFG_ALL }, |
| 510 | { "banner", sBanner, SSHCFG_ALL }, |
| 511 | { "usedns", sUseDNS, SSHCFG_GLOBAL }, |
| 512 | { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL }, |
| 513 | { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL }, |
| 514 | { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL }, |
| 515 | { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL }, |
| 516 | { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL }, |
| 517 | { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL }, |
| 518 | { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL}, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 519 | { "acceptenv", sAcceptEnv, SSHCFG_ALL }, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 520 | { "permittunnel", sPermitTunnel, SSHCFG_ALL }, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 521 | { "permittty", sPermitTTY, SSHCFG_ALL }, |
| 522 | { "permituserrc", sPermitUserRC, SSHCFG_ALL }, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 523 | { "match", sMatch, SSHCFG_ALL }, |
| 524 | { "permitopen", sPermitOpen, SSHCFG_ALL }, |
| 525 | { "forcecommand", sForceCommand, SSHCFG_ALL }, |
| 526 | { "chrootdirectory", sChrootDirectory, SSHCFG_ALL }, |
| 527 | { "hostcertificate", sHostCertificate, SSHCFG_GLOBAL }, |
| 528 | { "revokedkeys", sRevokedKeys, SSHCFG_ALL }, |
| 529 | { "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL }, |
| 530 | { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL }, |
| 531 | { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL }, |
| 532 | { "ipqos", sIPQoS, SSHCFG_ALL }, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 533 | { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL }, |
| 534 | { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL }, |
| 535 | { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL }, |
| 536 | { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL }, |
| 537 | { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL }, |
| 538 | { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL }, |
| 539 | { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL }, |
| 540 | { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL }, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 541 | { NULL, sBadOption, 0 } |
| 542 | }; |
| 543 | |
| 544 | static struct { |
| 545 | int val; |
| 546 | char *text; |
| 547 | } tunmode_desc[] = { |
| 548 | { SSH_TUNMODE_NO, "no" }, |
| 549 | { SSH_TUNMODE_POINTOPOINT, "point-to-point" }, |
| 550 | { SSH_TUNMODE_ETHERNET, "ethernet" }, |
| 551 | { SSH_TUNMODE_YES, "yes" }, |
| 552 | { -1, NULL } |
| 553 | }; |
| 554 | |
| 555 | /* |
| 556 | * Returns the number of the token pointed to by cp or sBadOption. |
| 557 | */ |
| 558 | |
| 559 | static ServerOpCodes |
| 560 | parse_token(const char *cp, const char *filename, |
| 561 | int linenum, u_int *flags) |
| 562 | { |
| 563 | u_int i; |
| 564 | |
| 565 | for (i = 0; keywords[i].name; i++) |
| 566 | if (strcasecmp(cp, keywords[i].name) == 0) { |
| 567 | *flags = keywords[i].flags; |
| 568 | return keywords[i].opcode; |
| 569 | } |
| 570 | |
| 571 | error("%s: line %d: Bad configuration option: %s", |
| 572 | filename, linenum, cp); |
| 573 | return sBadOption; |
| 574 | } |
| 575 | |
| 576 | char * |
| 577 | derelativise_path(const char *path) |
| 578 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 579 | char *expanded, *ret, cwd[PATH_MAX]; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 580 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 581 | if (strcasecmp(path, "none") == 0) |
| 582 | return xstrdup("none"); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 583 | expanded = tilde_expand_filename(path, getuid()); |
| 584 | if (*expanded == '/') |
| 585 | return expanded; |
| 586 | if (getcwd(cwd, sizeof(cwd)) == NULL) |
| 587 | fatal("%s: getcwd: %s", __func__, strerror(errno)); |
| 588 | xasprintf(&ret, "%s/%s", cwd, expanded); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 589 | free(expanded); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 590 | return ret; |
| 591 | } |
| 592 | |
| 593 | static void |
| 594 | add_listen_addr(ServerOptions *options, char *addr, int port) |
| 595 | { |
| 596 | u_int i; |
| 597 | |
| 598 | if (options->num_ports == 0) |
| 599 | options->ports[options->num_ports++] = SSH_DEFAULT_PORT; |
| 600 | if (options->address_family == -1) |
| 601 | options->address_family = AF_UNSPEC; |
| 602 | if (port == 0) |
| 603 | for (i = 0; i < options->num_ports; i++) |
| 604 | add_one_listen_addr(options, addr, options->ports[i]); |
| 605 | else |
| 606 | add_one_listen_addr(options, addr, port); |
| 607 | } |
| 608 | |
| 609 | static void |
| 610 | add_one_listen_addr(ServerOptions *options, char *addr, int port) |
| 611 | { |
| 612 | struct addrinfo hints, *ai, *aitop; |
| 613 | char strport[NI_MAXSERV]; |
| 614 | int gaierr; |
| 615 | |
| 616 | memset(&hints, 0, sizeof(hints)); |
| 617 | hints.ai_family = options->address_family; |
| 618 | hints.ai_socktype = SOCK_STREAM; |
| 619 | hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; |
| 620 | snprintf(strport, sizeof strport, "%d", port); |
| 621 | if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) |
| 622 | fatal("bad addr or host: %s (%s)", |
| 623 | addr ? addr : "<NULL>", |
| 624 | ssh_gai_strerror(gaierr)); |
| 625 | for (ai = aitop; ai->ai_next; ai = ai->ai_next) |
| 626 | ; |
| 627 | ai->ai_next = options->listen_addrs; |
| 628 | options->listen_addrs = aitop; |
| 629 | } |
| 630 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 631 | struct connection_info * |
| 632 | get_connection_info(int populate, int use_dns) |
| 633 | { |
| 634 | static struct connection_info ci; |
| 635 | |
| 636 | if (!populate) |
| 637 | return &ci; |
| 638 | ci.host = get_canonical_hostname(use_dns); |
| 639 | ci.address = get_remote_ipaddr(); |
| 640 | ci.laddress = get_local_ipaddr(packet_get_connection_in()); |
| 641 | ci.lport = get_local_port(); |
| 642 | return &ci; |
| 643 | } |
| 644 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 645 | /* |
| 646 | * The strategy for the Match blocks is that the config file is parsed twice. |
| 647 | * |
| 648 | * The first time is at startup. activep is initialized to 1 and the |
| 649 | * directives in the global context are processed and acted on. Hitting a |
| 650 | * Match directive unsets activep and the directives inside the block are |
| 651 | * checked for syntax only. |
| 652 | * |
| 653 | * The second time is after a connection has been established but before |
| 654 | * authentication. activep is initialized to 2 and global config directives |
| 655 | * are ignored since they have already been processed. If the criteria in a |
| 656 | * Match block is met, activep is set and the subsequent directives |
| 657 | * processed and actioned until EOF or another Match block unsets it. Any |
| 658 | * options set are copied into the main server config. |
| 659 | * |
| 660 | * Potential additions/improvements: |
| 661 | * - Add Match support for pre-kex directives, eg Protocol, Ciphers. |
| 662 | * |
| 663 | * - Add a Tag directive (idea from David Leonard) ala pf, eg: |
| 664 | * Match Address 192.168.0.* |
| 665 | * Tag trusted |
| 666 | * Match Group wheel |
| 667 | * Tag trusted |
| 668 | * Match Tag trusted |
| 669 | * AllowTcpForwarding yes |
| 670 | * GatewayPorts clientspecified |
| 671 | * [...] |
| 672 | * |
| 673 | * - Add a PermittedChannelRequests directive |
| 674 | * Match Group shell |
| 675 | * PermittedChannelRequests session,forwarded-tcpip |
| 676 | */ |
| 677 | |
| 678 | static int |
| 679 | match_cfg_line_group(const char *grps, int line, const char *user) |
| 680 | { |
| 681 | int result = 0; |
| 682 | struct passwd *pw; |
| 683 | |
| 684 | if (user == NULL) |
| 685 | goto out; |
| 686 | |
| 687 | if ((pw = getpwnam(user)) == NULL) { |
| 688 | debug("Can't match group at line %d because user %.100s does " |
| 689 | "not exist", line, user); |
| 690 | } else if (ga_init(pw->pw_name, pw->pw_gid) == 0) { |
| 691 | debug("Can't Match group because user %.100s not in any group " |
| 692 | "at line %d", user, line); |
| 693 | } else if (ga_match_pattern_list(grps) != 1) { |
| 694 | debug("user %.100s does not match group list %.100s at line %d", |
| 695 | user, grps, line); |
| 696 | } else { |
| 697 | debug("user %.100s matched group list %.100s at line %d", user, |
| 698 | grps, line); |
| 699 | result = 1; |
| 700 | } |
| 701 | out: |
| 702 | ga_free(); |
| 703 | return result; |
| 704 | } |
| 705 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 706 | /* |
| 707 | * All of the attributes on a single Match line are ANDed together, so we need |
| 708 | * to check every attribute and set the result to zero if any attribute does |
| 709 | * not match. |
| 710 | */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 711 | static int |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 712 | match_cfg_line(char **condition, int line, struct connection_info *ci) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 713 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 714 | int result = 1, attributes = 0, port; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 715 | char *arg, *attrib, *cp = *condition; |
| 716 | size_t len; |
| 717 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 718 | if (ci == NULL) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 719 | debug3("checking syntax for 'Match %s'", cp); |
| 720 | else |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 721 | debug3("checking match for '%s' user %s host %s addr %s " |
| 722 | "laddr %s lport %d", cp, ci->user ? ci->user : "(null)", |
| 723 | ci->host ? ci->host : "(null)", |
| 724 | ci->address ? ci->address : "(null)", |
| 725 | ci->laddress ? ci->laddress : "(null)", ci->lport); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 726 | |
| 727 | while ((attrib = strdelim(&cp)) && *attrib != '\0') { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 728 | attributes++; |
| 729 | if (strcasecmp(attrib, "all") == 0) { |
| 730 | if (attributes != 1 || |
| 731 | ((arg = strdelim(&cp)) != NULL && *arg != '\0')) { |
| 732 | error("'all' cannot be combined with other " |
| 733 | "Match attributes"); |
| 734 | return -1; |
| 735 | } |
| 736 | *condition = cp; |
| 737 | return 1; |
| 738 | } |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 739 | if ((arg = strdelim(&cp)) == NULL || *arg == '\0') { |
| 740 | error("Missing Match criteria for %s", attrib); |
| 741 | return -1; |
| 742 | } |
| 743 | len = strlen(arg); |
| 744 | if (strcasecmp(attrib, "user") == 0) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 745 | if (ci == NULL || ci->user == NULL) { |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 746 | result = 0; |
| 747 | continue; |
| 748 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 749 | if (match_pattern_list(ci->user, arg, len, 0) != 1) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 750 | result = 0; |
| 751 | else |
| 752 | debug("user %.100s matched 'User %.100s' at " |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 753 | "line %d", ci->user, arg, line); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 754 | } else if (strcasecmp(attrib, "group") == 0) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 755 | if (ci == NULL || ci->user == NULL) { |
| 756 | result = 0; |
| 757 | continue; |
| 758 | } |
| 759 | switch (match_cfg_line_group(arg, line, ci->user)) { |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 760 | case -1: |
| 761 | return -1; |
| 762 | case 0: |
| 763 | result = 0; |
| 764 | } |
| 765 | } else if (strcasecmp(attrib, "host") == 0) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 766 | if (ci == NULL || ci->host == NULL) { |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 767 | result = 0; |
| 768 | continue; |
| 769 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 770 | if (match_hostname(ci->host, arg, len) != 1) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 771 | result = 0; |
| 772 | else |
| 773 | debug("connection from %.100s matched 'Host " |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 774 | "%.100s' at line %d", ci->host, arg, line); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 775 | } else if (strcasecmp(attrib, "address") == 0) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 776 | if (ci == NULL || ci->address == NULL) { |
| 777 | result = 0; |
| 778 | continue; |
| 779 | } |
| 780 | switch (addr_match_list(ci->address, arg)) { |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 781 | case 1: |
| 782 | debug("connection from %.100s matched 'Address " |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 783 | "%.100s' at line %d", ci->address, arg, line); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 784 | break; |
| 785 | case 0: |
| 786 | case -1: |
| 787 | result = 0; |
| 788 | break; |
| 789 | case -2: |
| 790 | return -1; |
| 791 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 792 | } else if (strcasecmp(attrib, "localaddress") == 0){ |
| 793 | if (ci == NULL || ci->laddress == NULL) { |
| 794 | result = 0; |
| 795 | continue; |
| 796 | } |
| 797 | switch (addr_match_list(ci->laddress, arg)) { |
| 798 | case 1: |
| 799 | debug("connection from %.100s matched " |
| 800 | "'LocalAddress %.100s' at line %d", |
| 801 | ci->laddress, arg, line); |
| 802 | break; |
| 803 | case 0: |
| 804 | case -1: |
| 805 | result = 0; |
| 806 | break; |
| 807 | case -2: |
| 808 | return -1; |
| 809 | } |
| 810 | } else if (strcasecmp(attrib, "localport") == 0) { |
| 811 | if ((port = a2port(arg)) == -1) { |
| 812 | error("Invalid LocalPort '%s' on Match line", |
| 813 | arg); |
| 814 | return -1; |
| 815 | } |
| 816 | if (ci == NULL || ci->lport == 0) { |
| 817 | result = 0; |
| 818 | continue; |
| 819 | } |
| 820 | /* TODO support port lists */ |
| 821 | if (port == ci->lport) |
| 822 | debug("connection from %.100s matched " |
| 823 | "'LocalPort %d' at line %d", |
| 824 | ci->laddress, port, line); |
| 825 | else |
| 826 | result = 0; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 827 | } else { |
| 828 | error("Unsupported Match attribute %s", attrib); |
| 829 | return -1; |
| 830 | } |
| 831 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 832 | if (attributes == 0) { |
| 833 | error("One or more attributes required for Match"); |
| 834 | return -1; |
| 835 | } |
| 836 | if (ci != NULL) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 837 | debug3("match %sfound", result ? "" : "not "); |
| 838 | *condition = cp; |
| 839 | return result; |
| 840 | } |
| 841 | |
| 842 | #define WHITESPACE " \t\r\n" |
| 843 | |
| 844 | /* Multistate option parsing */ |
| 845 | struct multistate { |
| 846 | char *key; |
| 847 | int value; |
| 848 | }; |
| 849 | static const struct multistate multistate_addressfamily[] = { |
| 850 | { "inet", AF_INET }, |
| 851 | { "inet6", AF_INET6 }, |
| 852 | { "any", AF_UNSPEC }, |
| 853 | { NULL, -1 } |
| 854 | }; |
| 855 | static const struct multistate multistate_permitrootlogin[] = { |
| 856 | { "without-password", PERMIT_NO_PASSWD }, |
| 857 | { "forced-commands-only", PERMIT_FORCED_ONLY }, |
| 858 | { "yes", PERMIT_YES }, |
| 859 | { "no", PERMIT_NO }, |
| 860 | { NULL, -1 } |
| 861 | }; |
| 862 | static const struct multistate multistate_compression[] = { |
| 863 | { "delayed", COMP_DELAYED }, |
| 864 | { "yes", COMP_ZLIB }, |
| 865 | { "no", COMP_NONE }, |
| 866 | { NULL, -1 } |
| 867 | }; |
| 868 | static const struct multistate multistate_gatewayports[] = { |
| 869 | { "clientspecified", 2 }, |
| 870 | { "yes", 1 }, |
| 871 | { "no", 0 }, |
| 872 | { NULL, -1 } |
| 873 | }; |
| 874 | static const struct multistate multistate_privsep[] = { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 875 | { "yes", PRIVSEP_NOSANDBOX }, |
| 876 | { "sandbox", PRIVSEP_ON }, |
| 877 | { "nosandbox", PRIVSEP_NOSANDBOX }, |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 878 | { "no", PRIVSEP_OFF }, |
| 879 | { NULL, -1 } |
| 880 | }; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 881 | static const struct multistate multistate_tcpfwd[] = { |
| 882 | { "yes", FORWARD_ALLOW }, |
| 883 | { "all", FORWARD_ALLOW }, |
| 884 | { "no", FORWARD_DENY }, |
| 885 | { "remote", FORWARD_REMOTE }, |
| 886 | { "local", FORWARD_LOCAL }, |
| 887 | { NULL, -1 } |
| 888 | }; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 889 | |
| 890 | int |
| 891 | process_server_config_line(ServerOptions *options, char *line, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 892 | const char *filename, int linenum, int *activep, |
| 893 | struct connection_info *connectinfo) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 894 | { |
| 895 | char *cp, **charptr, *arg, *p; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 896 | int cmdline = 0, *intptr, value, value2, n, port; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 897 | SyslogFacility *log_facility_ptr; |
| 898 | LogLevel *log_level_ptr; |
| 899 | ServerOpCodes opcode; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 900 | u_int i, flags = 0; |
| 901 | size_t len; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 902 | long long val64; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 903 | const struct multistate *multistate_ptr; |
| 904 | |
| 905 | cp = line; |
| 906 | if ((arg = strdelim(&cp)) == NULL) |
| 907 | return 0; |
| 908 | /* Ignore leading whitespace */ |
| 909 | if (*arg == '\0') |
| 910 | arg = strdelim(&cp); |
| 911 | if (!arg || !*arg || *arg == '#') |
| 912 | return 0; |
| 913 | intptr = NULL; |
| 914 | charptr = NULL; |
| 915 | opcode = parse_token(arg, filename, linenum, &flags); |
| 916 | |
| 917 | if (activep == NULL) { /* We are processing a command line directive */ |
| 918 | cmdline = 1; |
| 919 | activep = &cmdline; |
| 920 | } |
| 921 | if (*activep && opcode != sMatch) |
| 922 | debug3("%s:%d setting %s %s", filename, linenum, arg, cp); |
| 923 | if (*activep == 0 && !(flags & SSHCFG_MATCH)) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 924 | if (connectinfo == NULL) { |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 925 | fatal("%s line %d: Directive '%s' is not allowed " |
| 926 | "within a Match block", filename, linenum, arg); |
| 927 | } else { /* this is a directive we have already processed */ |
| 928 | while (arg) |
| 929 | arg = strdelim(&cp); |
| 930 | return 0; |
| 931 | } |
| 932 | } |
| 933 | |
| 934 | switch (opcode) { |
| 935 | /* Portable-specific options */ |
| 936 | case sUsePAM: |
| 937 | intptr = &options->use_pam; |
| 938 | goto parse_flag; |
| 939 | |
| 940 | /* Standard Options */ |
| 941 | case sBadOption: |
| 942 | return -1; |
| 943 | case sPort: |
| 944 | /* ignore ports from configfile if cmdline specifies ports */ |
| 945 | if (options->ports_from_cmdline) |
| 946 | return 0; |
| 947 | if (options->listen_addrs != NULL) |
| 948 | fatal("%s line %d: ports must be specified before " |
| 949 | "ListenAddress.", filename, linenum); |
| 950 | if (options->num_ports >= MAX_PORTS) |
| 951 | fatal("%s line %d: too many ports.", |
| 952 | filename, linenum); |
| 953 | arg = strdelim(&cp); |
| 954 | if (!arg || *arg == '\0') |
| 955 | fatal("%s line %d: missing port number.", |
| 956 | filename, linenum); |
| 957 | options->ports[options->num_ports++] = a2port(arg); |
| 958 | if (options->ports[options->num_ports-1] <= 0) |
| 959 | fatal("%s line %d: Badly formatted port number.", |
| 960 | filename, linenum); |
| 961 | break; |
| 962 | |
| 963 | case sServerKeyBits: |
| 964 | intptr = &options->server_key_bits; |
| 965 | parse_int: |
| 966 | arg = strdelim(&cp); |
| 967 | if (!arg || *arg == '\0') |
| 968 | fatal("%s line %d: missing integer value.", |
| 969 | filename, linenum); |
| 970 | value = atoi(arg); |
| 971 | if (*activep && *intptr == -1) |
| 972 | *intptr = value; |
| 973 | break; |
| 974 | |
| 975 | case sLoginGraceTime: |
| 976 | intptr = &options->login_grace_time; |
| 977 | parse_time: |
| 978 | arg = strdelim(&cp); |
| 979 | if (!arg || *arg == '\0') |
| 980 | fatal("%s line %d: missing time value.", |
| 981 | filename, linenum); |
| 982 | if ((value = convtime(arg)) == -1) |
| 983 | fatal("%s line %d: invalid time value.", |
| 984 | filename, linenum); |
| 985 | if (*intptr == -1) |
| 986 | *intptr = value; |
| 987 | break; |
| 988 | |
| 989 | case sKeyRegenerationTime: |
| 990 | intptr = &options->key_regeneration_time; |
| 991 | goto parse_time; |
| 992 | |
| 993 | case sListenAddress: |
| 994 | arg = strdelim(&cp); |
| 995 | if (arg == NULL || *arg == '\0') |
| 996 | fatal("%s line %d: missing address", |
| 997 | filename, linenum); |
| 998 | /* check for bare IPv6 address: no "[]" and 2 or more ":" */ |
| 999 | if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL |
| 1000 | && strchr(p+1, ':') != NULL) { |
| 1001 | add_listen_addr(options, arg, 0); |
| 1002 | break; |
| 1003 | } |
| 1004 | p = hpdelim(&arg); |
| 1005 | if (p == NULL) |
| 1006 | fatal("%s line %d: bad address:port usage", |
| 1007 | filename, linenum); |
| 1008 | p = cleanhostname(p); |
| 1009 | if (arg == NULL) |
| 1010 | port = 0; |
| 1011 | else if ((port = a2port(arg)) <= 0) |
| 1012 | fatal("%s line %d: bad port number", filename, linenum); |
| 1013 | |
| 1014 | add_listen_addr(options, p, port); |
| 1015 | |
| 1016 | break; |
| 1017 | |
| 1018 | case sAddressFamily: |
| 1019 | intptr = &options->address_family; |
| 1020 | multistate_ptr = multistate_addressfamily; |
| 1021 | if (options->listen_addrs != NULL) |
| 1022 | fatal("%s line %d: address family must be specified " |
| 1023 | "before ListenAddress.", filename, linenum); |
| 1024 | parse_multistate: |
| 1025 | arg = strdelim(&cp); |
| 1026 | if (!arg || *arg == '\0') |
| 1027 | fatal("%s line %d: missing argument.", |
| 1028 | filename, linenum); |
| 1029 | value = -1; |
| 1030 | for (i = 0; multistate_ptr[i].key != NULL; i++) { |
| 1031 | if (strcasecmp(arg, multistate_ptr[i].key) == 0) { |
| 1032 | value = multistate_ptr[i].value; |
| 1033 | break; |
| 1034 | } |
| 1035 | } |
| 1036 | if (value == -1) |
| 1037 | fatal("%s line %d: unsupported option \"%s\".", |
| 1038 | filename, linenum, arg); |
| 1039 | if (*activep && *intptr == -1) |
| 1040 | *intptr = value; |
| 1041 | break; |
| 1042 | |
| 1043 | case sHostKeyFile: |
| 1044 | intptr = &options->num_host_key_files; |
| 1045 | if (*intptr >= MAX_HOSTKEYS) |
| 1046 | fatal("%s line %d: too many host keys specified (max %d).", |
| 1047 | filename, linenum, MAX_HOSTKEYS); |
| 1048 | charptr = &options->host_key_files[*intptr]; |
| 1049 | parse_filename: |
| 1050 | arg = strdelim(&cp); |
| 1051 | if (!arg || *arg == '\0') |
| 1052 | fatal("%s line %d: missing file name.", |
| 1053 | filename, linenum); |
| 1054 | if (*activep && *charptr == NULL) { |
| 1055 | *charptr = derelativise_path(arg); |
| 1056 | /* increase optional counter */ |
| 1057 | if (intptr != NULL) |
| 1058 | *intptr = *intptr + 1; |
| 1059 | } |
| 1060 | break; |
| 1061 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1062 | case sHostKeyAgent: |
| 1063 | charptr = &options->host_key_agent; |
| 1064 | arg = strdelim(&cp); |
| 1065 | if (!arg || *arg == '\0') |
| 1066 | fatal("%s line %d: missing socket name.", |
| 1067 | filename, linenum); |
| 1068 | if (*activep && *charptr == NULL) |
| 1069 | *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ? |
| 1070 | xstrdup(arg) : derelativise_path(arg); |
| 1071 | break; |
| 1072 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1073 | case sHostCertificate: |
| 1074 | intptr = &options->num_host_cert_files; |
| 1075 | if (*intptr >= MAX_HOSTKEYS) |
| 1076 | fatal("%s line %d: too many host certificates " |
| 1077 | "specified (max %d).", filename, linenum, |
| 1078 | MAX_HOSTCERTS); |
| 1079 | charptr = &options->host_cert_files[*intptr]; |
| 1080 | goto parse_filename; |
| 1081 | break; |
| 1082 | |
| 1083 | case sPidFile: |
| 1084 | charptr = &options->pid_file; |
| 1085 | goto parse_filename; |
| 1086 | |
| 1087 | case sPermitRootLogin: |
| 1088 | intptr = &options->permit_root_login; |
| 1089 | multistate_ptr = multistate_permitrootlogin; |
| 1090 | goto parse_multistate; |
| 1091 | |
| 1092 | case sIgnoreRhosts: |
| 1093 | intptr = &options->ignore_rhosts; |
| 1094 | parse_flag: |
| 1095 | arg = strdelim(&cp); |
| 1096 | if (!arg || *arg == '\0') |
| 1097 | fatal("%s line %d: missing yes/no argument.", |
| 1098 | filename, linenum); |
| 1099 | value = 0; /* silence compiler */ |
| 1100 | if (strcmp(arg, "yes") == 0) |
| 1101 | value = 1; |
| 1102 | else if (strcmp(arg, "no") == 0) |
| 1103 | value = 0; |
| 1104 | else |
| 1105 | fatal("%s line %d: Bad yes/no argument: %s", |
| 1106 | filename, linenum, arg); |
| 1107 | if (*activep && *intptr == -1) |
| 1108 | *intptr = value; |
| 1109 | break; |
| 1110 | |
| 1111 | case sIgnoreUserKnownHosts: |
| 1112 | intptr = &options->ignore_user_known_hosts; |
| 1113 | goto parse_flag; |
| 1114 | |
| 1115 | case sRhostsRSAAuthentication: |
| 1116 | intptr = &options->rhosts_rsa_authentication; |
| 1117 | goto parse_flag; |
| 1118 | |
| 1119 | case sHostbasedAuthentication: |
| 1120 | intptr = &options->hostbased_authentication; |
| 1121 | goto parse_flag; |
| 1122 | |
| 1123 | case sHostbasedUsesNameFromPacketOnly: |
| 1124 | intptr = &options->hostbased_uses_name_from_packet_only; |
| 1125 | goto parse_flag; |
| 1126 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1127 | case sHostbasedAcceptedKeyTypes: |
| 1128 | charptr = &options->hostbased_key_types; |
| 1129 | parse_keytypes: |
| 1130 | arg = strdelim(&cp); |
| 1131 | if (!arg || *arg == '\0') |
| 1132 | fatal("%s line %d: Missing argument.", |
| 1133 | filename, linenum); |
| 1134 | if (!sshkey_names_valid2(arg, 1)) |
| 1135 | fatal("%s line %d: Bad key types '%s'.", |
| 1136 | filename, linenum, arg ? arg : "<NONE>"); |
| 1137 | if (*activep && *charptr == NULL) |
| 1138 | *charptr = xstrdup(arg); |
| 1139 | break; |
| 1140 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1141 | case sRSAAuthentication: |
| 1142 | intptr = &options->rsa_authentication; |
| 1143 | goto parse_flag; |
| 1144 | |
| 1145 | case sPubkeyAuthentication: |
| 1146 | intptr = &options->pubkey_authentication; |
| 1147 | goto parse_flag; |
| 1148 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1149 | case sPubkeyAcceptedKeyTypes: |
| 1150 | charptr = &options->pubkey_key_types; |
| 1151 | goto parse_keytypes; |
| 1152 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1153 | case sKerberosAuthentication: |
| 1154 | intptr = &options->kerberos_authentication; |
| 1155 | goto parse_flag; |
| 1156 | |
| 1157 | case sKerberosOrLocalPasswd: |
| 1158 | intptr = &options->kerberos_or_local_passwd; |
| 1159 | goto parse_flag; |
| 1160 | |
| 1161 | case sKerberosTicketCleanup: |
| 1162 | intptr = &options->kerberos_ticket_cleanup; |
| 1163 | goto parse_flag; |
| 1164 | |
| 1165 | case sKerberosGetAFSToken: |
| 1166 | intptr = &options->kerberos_get_afs_token; |
| 1167 | goto parse_flag; |
| 1168 | |
| 1169 | case sGssAuthentication: |
| 1170 | intptr = &options->gss_authentication; |
| 1171 | goto parse_flag; |
| 1172 | |
| 1173 | case sGssCleanupCreds: |
| 1174 | intptr = &options->gss_cleanup_creds; |
| 1175 | goto parse_flag; |
| 1176 | |
| 1177 | case sPasswordAuthentication: |
| 1178 | intptr = &options->password_authentication; |
| 1179 | goto parse_flag; |
| 1180 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1181 | case sKbdInteractiveAuthentication: |
| 1182 | intptr = &options->kbd_interactive_authentication; |
| 1183 | goto parse_flag; |
| 1184 | |
| 1185 | case sChallengeResponseAuthentication: |
| 1186 | intptr = &options->challenge_response_authentication; |
| 1187 | goto parse_flag; |
| 1188 | |
| 1189 | case sPrintMotd: |
| 1190 | intptr = &options->print_motd; |
| 1191 | goto parse_flag; |
| 1192 | |
| 1193 | case sPrintLastLog: |
| 1194 | intptr = &options->print_lastlog; |
| 1195 | goto parse_flag; |
| 1196 | |
| 1197 | case sX11Forwarding: |
| 1198 | intptr = &options->x11_forwarding; |
| 1199 | goto parse_flag; |
| 1200 | |
| 1201 | case sX11DisplayOffset: |
| 1202 | intptr = &options->x11_display_offset; |
| 1203 | goto parse_int; |
| 1204 | |
| 1205 | case sX11UseLocalhost: |
| 1206 | intptr = &options->x11_use_localhost; |
| 1207 | goto parse_flag; |
| 1208 | |
| 1209 | case sXAuthLocation: |
| 1210 | charptr = &options->xauth_location; |
| 1211 | goto parse_filename; |
| 1212 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1213 | case sPermitTTY: |
| 1214 | intptr = &options->permit_tty; |
| 1215 | goto parse_flag; |
| 1216 | |
| 1217 | case sPermitUserRC: |
| 1218 | intptr = &options->permit_user_rc; |
| 1219 | goto parse_flag; |
| 1220 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1221 | case sStrictModes: |
| 1222 | intptr = &options->strict_modes; |
| 1223 | goto parse_flag; |
| 1224 | |
| 1225 | case sTCPKeepAlive: |
| 1226 | intptr = &options->tcp_keep_alive; |
| 1227 | goto parse_flag; |
| 1228 | |
| 1229 | case sEmptyPasswd: |
| 1230 | intptr = &options->permit_empty_passwd; |
| 1231 | goto parse_flag; |
| 1232 | |
| 1233 | case sPermitUserEnvironment: |
| 1234 | intptr = &options->permit_user_env; |
| 1235 | goto parse_flag; |
| 1236 | |
| 1237 | case sUseLogin: |
| 1238 | intptr = &options->use_login; |
| 1239 | goto parse_flag; |
| 1240 | |
| 1241 | case sCompression: |
| 1242 | intptr = &options->compression; |
| 1243 | multistate_ptr = multistate_compression; |
| 1244 | goto parse_multistate; |
| 1245 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1246 | case sRekeyLimit: |
| 1247 | arg = strdelim(&cp); |
| 1248 | if (!arg || *arg == '\0') |
| 1249 | fatal("%.200s line %d: Missing argument.", filename, |
| 1250 | linenum); |
| 1251 | if (strcmp(arg, "default") == 0) { |
| 1252 | val64 = 0; |
| 1253 | } else { |
| 1254 | if (scan_scaled(arg, &val64) == -1) |
| 1255 | fatal("%.200s line %d: Bad number '%s': %s", |
| 1256 | filename, linenum, arg, strerror(errno)); |
| 1257 | /* check for too-large or too-small limits */ |
| 1258 | if (val64 > UINT_MAX) |
| 1259 | fatal("%.200s line %d: RekeyLimit too large", |
| 1260 | filename, linenum); |
| 1261 | if (val64 != 0 && val64 < 16) |
| 1262 | fatal("%.200s line %d: RekeyLimit too small", |
| 1263 | filename, linenum); |
| 1264 | } |
| 1265 | if (*activep && options->rekey_limit == -1) |
| 1266 | options->rekey_limit = (u_int32_t)val64; |
| 1267 | if (cp != NULL) { /* optional rekey interval present */ |
| 1268 | if (strcmp(cp, "none") == 0) { |
| 1269 | (void)strdelim(&cp); /* discard */ |
| 1270 | break; |
| 1271 | } |
| 1272 | intptr = &options->rekey_interval; |
| 1273 | goto parse_time; |
| 1274 | } |
| 1275 | break; |
| 1276 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1277 | case sGatewayPorts: |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1278 | intptr = &options->fwd_opts.gateway_ports; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1279 | multistate_ptr = multistate_gatewayports; |
| 1280 | goto parse_multistate; |
| 1281 | |
| 1282 | case sUseDNS: |
| 1283 | intptr = &options->use_dns; |
| 1284 | goto parse_flag; |
| 1285 | |
| 1286 | case sLogFacility: |
| 1287 | log_facility_ptr = &options->log_facility; |
| 1288 | arg = strdelim(&cp); |
| 1289 | value = log_facility_number(arg); |
| 1290 | if (value == SYSLOG_FACILITY_NOT_SET) |
| 1291 | fatal("%.200s line %d: unsupported log facility '%s'", |
| 1292 | filename, linenum, arg ? arg : "<NONE>"); |
| 1293 | if (*log_facility_ptr == -1) |
| 1294 | *log_facility_ptr = (SyslogFacility) value; |
| 1295 | break; |
| 1296 | |
| 1297 | case sLogLevel: |
| 1298 | log_level_ptr = &options->log_level; |
| 1299 | arg = strdelim(&cp); |
| 1300 | value = log_level_number(arg); |
| 1301 | if (value == SYSLOG_LEVEL_NOT_SET) |
| 1302 | fatal("%.200s line %d: unsupported log level '%s'", |
| 1303 | filename, linenum, arg ? arg : "<NONE>"); |
| 1304 | if (*log_level_ptr == -1) |
| 1305 | *log_level_ptr = (LogLevel) value; |
| 1306 | break; |
| 1307 | |
| 1308 | case sAllowTcpForwarding: |
| 1309 | intptr = &options->allow_tcp_forwarding; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1310 | multistate_ptr = multistate_tcpfwd; |
| 1311 | goto parse_multistate; |
| 1312 | |
| 1313 | case sAllowStreamLocalForwarding: |
| 1314 | intptr = &options->allow_streamlocal_forwarding; |
| 1315 | multistate_ptr = multistate_tcpfwd; |
| 1316 | goto parse_multistate; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1317 | |
| 1318 | case sAllowAgentForwarding: |
| 1319 | intptr = &options->allow_agent_forwarding; |
| 1320 | goto parse_flag; |
| 1321 | |
| 1322 | case sUsePrivilegeSeparation: |
| 1323 | intptr = &use_privsep; |
| 1324 | multistate_ptr = multistate_privsep; |
| 1325 | goto parse_multistate; |
| 1326 | |
| 1327 | case sAllowUsers: |
| 1328 | while ((arg = strdelim(&cp)) && *arg != '\0') { |
| 1329 | if (options->num_allow_users >= MAX_ALLOW_USERS) |
| 1330 | fatal("%s line %d: too many allow users.", |
| 1331 | filename, linenum); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1332 | if (!*activep) |
| 1333 | continue; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1334 | options->allow_users[options->num_allow_users++] = |
| 1335 | xstrdup(arg); |
| 1336 | } |
| 1337 | break; |
| 1338 | |
| 1339 | case sDenyUsers: |
| 1340 | while ((arg = strdelim(&cp)) && *arg != '\0') { |
| 1341 | if (options->num_deny_users >= MAX_DENY_USERS) |
| 1342 | fatal("%s line %d: too many deny users.", |
| 1343 | filename, linenum); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1344 | if (!*activep) |
| 1345 | continue; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1346 | options->deny_users[options->num_deny_users++] = |
| 1347 | xstrdup(arg); |
| 1348 | } |
| 1349 | break; |
| 1350 | |
| 1351 | case sAllowGroups: |
| 1352 | while ((arg = strdelim(&cp)) && *arg != '\0') { |
| 1353 | if (options->num_allow_groups >= MAX_ALLOW_GROUPS) |
| 1354 | fatal("%s line %d: too many allow groups.", |
| 1355 | filename, linenum); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1356 | if (!*activep) |
| 1357 | continue; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1358 | options->allow_groups[options->num_allow_groups++] = |
| 1359 | xstrdup(arg); |
| 1360 | } |
| 1361 | break; |
| 1362 | |
| 1363 | case sDenyGroups: |
| 1364 | while ((arg = strdelim(&cp)) && *arg != '\0') { |
| 1365 | if (options->num_deny_groups >= MAX_DENY_GROUPS) |
| 1366 | fatal("%s line %d: too many deny groups.", |
| 1367 | filename, linenum); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1368 | if (!*activep) |
| 1369 | continue; |
| 1370 | options->deny_groups[options->num_deny_groups++] = |
| 1371 | xstrdup(arg); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1372 | } |
| 1373 | break; |
| 1374 | |
| 1375 | case sCiphers: |
| 1376 | arg = strdelim(&cp); |
| 1377 | if (!arg || *arg == '\0') |
| 1378 | fatal("%s line %d: Missing argument.", filename, linenum); |
| 1379 | if (!ciphers_valid(arg)) |
| 1380 | fatal("%s line %d: Bad SSH2 cipher spec '%s'.", |
| 1381 | filename, linenum, arg ? arg : "<NONE>"); |
| 1382 | if (options->ciphers == NULL) |
| 1383 | options->ciphers = xstrdup(arg); |
| 1384 | break; |
| 1385 | |
| 1386 | case sMacs: |
| 1387 | arg = strdelim(&cp); |
| 1388 | if (!arg || *arg == '\0') |
| 1389 | fatal("%s line %d: Missing argument.", filename, linenum); |
| 1390 | if (!mac_valid(arg)) |
| 1391 | fatal("%s line %d: Bad SSH2 mac spec '%s'.", |
| 1392 | filename, linenum, arg ? arg : "<NONE>"); |
| 1393 | if (options->macs == NULL) |
| 1394 | options->macs = xstrdup(arg); |
| 1395 | break; |
| 1396 | |
| 1397 | case sKexAlgorithms: |
| 1398 | arg = strdelim(&cp); |
| 1399 | if (!arg || *arg == '\0') |
| 1400 | fatal("%s line %d: Missing argument.", |
| 1401 | filename, linenum); |
| 1402 | if (!kex_names_valid(arg)) |
| 1403 | fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.", |
| 1404 | filename, linenum, arg ? arg : "<NONE>"); |
| 1405 | if (options->kex_algorithms == NULL) |
| 1406 | options->kex_algorithms = xstrdup(arg); |
| 1407 | break; |
| 1408 | |
| 1409 | case sProtocol: |
| 1410 | intptr = &options->protocol; |
| 1411 | arg = strdelim(&cp); |
| 1412 | if (!arg || *arg == '\0') |
| 1413 | fatal("%s line %d: Missing argument.", filename, linenum); |
| 1414 | value = proto_spec(arg); |
| 1415 | if (value == SSH_PROTO_UNKNOWN) |
| 1416 | fatal("%s line %d: Bad protocol spec '%s'.", |
| 1417 | filename, linenum, arg ? arg : "<NONE>"); |
| 1418 | if (*intptr == SSH_PROTO_UNKNOWN) |
| 1419 | *intptr = value; |
| 1420 | break; |
| 1421 | |
| 1422 | case sSubsystem: |
| 1423 | if (options->num_subsystems >= MAX_SUBSYSTEMS) { |
| 1424 | fatal("%s line %d: too many subsystems defined.", |
| 1425 | filename, linenum); |
| 1426 | } |
| 1427 | arg = strdelim(&cp); |
| 1428 | if (!arg || *arg == '\0') |
| 1429 | fatal("%s line %d: Missing subsystem name.", |
| 1430 | filename, linenum); |
| 1431 | if (!*activep) { |
| 1432 | arg = strdelim(&cp); |
| 1433 | break; |
| 1434 | } |
| 1435 | for (i = 0; i < options->num_subsystems; i++) |
| 1436 | if (strcmp(arg, options->subsystem_name[i]) == 0) |
| 1437 | fatal("%s line %d: Subsystem '%s' already defined.", |
| 1438 | filename, linenum, arg); |
| 1439 | options->subsystem_name[options->num_subsystems] = xstrdup(arg); |
| 1440 | arg = strdelim(&cp); |
| 1441 | if (!arg || *arg == '\0') |
| 1442 | fatal("%s line %d: Missing subsystem command.", |
| 1443 | filename, linenum); |
| 1444 | options->subsystem_command[options->num_subsystems] = xstrdup(arg); |
| 1445 | |
| 1446 | /* Collect arguments (separate to executable) */ |
| 1447 | p = xstrdup(arg); |
| 1448 | len = strlen(p) + 1; |
| 1449 | while ((arg = strdelim(&cp)) != NULL && *arg != '\0') { |
| 1450 | len += 1 + strlen(arg); |
| 1451 | p = xrealloc(p, 1, len); |
| 1452 | strlcat(p, " ", len); |
| 1453 | strlcat(p, arg, len); |
| 1454 | } |
| 1455 | options->subsystem_args[options->num_subsystems] = p; |
| 1456 | options->num_subsystems++; |
| 1457 | break; |
| 1458 | |
| 1459 | case sMaxStartups: |
| 1460 | arg = strdelim(&cp); |
| 1461 | if (!arg || *arg == '\0') |
| 1462 | fatal("%s line %d: Missing MaxStartups spec.", |
| 1463 | filename, linenum); |
| 1464 | if ((n = sscanf(arg, "%d:%d:%d", |
| 1465 | &options->max_startups_begin, |
| 1466 | &options->max_startups_rate, |
| 1467 | &options->max_startups)) == 3) { |
| 1468 | if (options->max_startups_begin > |
| 1469 | options->max_startups || |
| 1470 | options->max_startups_rate > 100 || |
| 1471 | options->max_startups_rate < 1) |
| 1472 | fatal("%s line %d: Illegal MaxStartups spec.", |
| 1473 | filename, linenum); |
| 1474 | } else if (n != 1) |
| 1475 | fatal("%s line %d: Illegal MaxStartups spec.", |
| 1476 | filename, linenum); |
| 1477 | else |
| 1478 | options->max_startups = options->max_startups_begin; |
| 1479 | break; |
| 1480 | |
| 1481 | case sMaxAuthTries: |
| 1482 | intptr = &options->max_authtries; |
| 1483 | goto parse_int; |
| 1484 | |
| 1485 | case sMaxSessions: |
| 1486 | intptr = &options->max_sessions; |
| 1487 | goto parse_int; |
| 1488 | |
| 1489 | case sBanner: |
| 1490 | charptr = &options->banner; |
| 1491 | goto parse_filename; |
| 1492 | |
| 1493 | /* |
| 1494 | * These options can contain %X options expanded at |
| 1495 | * connect time, so that you can specify paths like: |
| 1496 | * |
| 1497 | * AuthorizedKeysFile /etc/ssh_keys/%u |
| 1498 | */ |
| 1499 | case sAuthorizedKeysFile: |
| 1500 | if (*activep && options->num_authkeys_files == 0) { |
| 1501 | while ((arg = strdelim(&cp)) && *arg != '\0') { |
| 1502 | if (options->num_authkeys_files >= |
| 1503 | MAX_AUTHKEYS_FILES) |
| 1504 | fatal("%s line %d: " |
| 1505 | "too many authorized keys files.", |
| 1506 | filename, linenum); |
| 1507 | options->authorized_keys_files[ |
| 1508 | options->num_authkeys_files++] = |
| 1509 | tilde_expand_filename(arg, getuid()); |
| 1510 | } |
| 1511 | } |
| 1512 | return 0; |
| 1513 | |
| 1514 | case sAuthorizedPrincipalsFile: |
| 1515 | charptr = &options->authorized_principals_file; |
| 1516 | arg = strdelim(&cp); |
| 1517 | if (!arg || *arg == '\0') |
| 1518 | fatal("%s line %d: missing file name.", |
| 1519 | filename, linenum); |
| 1520 | if (*activep && *charptr == NULL) { |
| 1521 | *charptr = tilde_expand_filename(arg, getuid()); |
| 1522 | /* increase optional counter */ |
| 1523 | if (intptr != NULL) |
| 1524 | *intptr = *intptr + 1; |
| 1525 | } |
| 1526 | break; |
| 1527 | |
| 1528 | case sClientAliveInterval: |
| 1529 | intptr = &options->client_alive_interval; |
| 1530 | goto parse_time; |
| 1531 | |
| 1532 | case sClientAliveCountMax: |
| 1533 | intptr = &options->client_alive_count_max; |
| 1534 | goto parse_int; |
| 1535 | |
| 1536 | case sAcceptEnv: |
| 1537 | while ((arg = strdelim(&cp)) && *arg != '\0') { |
| 1538 | if (strchr(arg, '=') != NULL) |
| 1539 | fatal("%s line %d: Invalid environment name.", |
| 1540 | filename, linenum); |
| 1541 | if (options->num_accept_env >= MAX_ACCEPT_ENV) |
| 1542 | fatal("%s line %d: too many allow env.", |
| 1543 | filename, linenum); |
| 1544 | if (!*activep) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1545 | continue; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1546 | options->accept_env[options->num_accept_env++] = |
| 1547 | xstrdup(arg); |
| 1548 | } |
| 1549 | break; |
| 1550 | |
| 1551 | case sPermitTunnel: |
| 1552 | intptr = &options->permit_tun; |
| 1553 | arg = strdelim(&cp); |
| 1554 | if (!arg || *arg == '\0') |
| 1555 | fatal("%s line %d: Missing yes/point-to-point/" |
| 1556 | "ethernet/no argument.", filename, linenum); |
| 1557 | value = -1; |
| 1558 | for (i = 0; tunmode_desc[i].val != -1; i++) |
| 1559 | if (strcmp(tunmode_desc[i].text, arg) == 0) { |
| 1560 | value = tunmode_desc[i].val; |
| 1561 | break; |
| 1562 | } |
| 1563 | if (value == -1) |
| 1564 | fatal("%s line %d: Bad yes/point-to-point/ethernet/" |
| 1565 | "no argument: %s", filename, linenum, arg); |
| 1566 | if (*intptr == -1) |
| 1567 | *intptr = value; |
| 1568 | break; |
| 1569 | |
| 1570 | case sMatch: |
| 1571 | if (cmdline) |
| 1572 | fatal("Match directive not supported as a command-line " |
| 1573 | "option"); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1574 | value = match_cfg_line(&cp, linenum, connectinfo); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1575 | if (value < 0) |
| 1576 | fatal("%s line %d: Bad Match condition", filename, |
| 1577 | linenum); |
| 1578 | *activep = value; |
| 1579 | break; |
| 1580 | |
| 1581 | case sPermitOpen: |
| 1582 | arg = strdelim(&cp); |
| 1583 | if (!arg || *arg == '\0') |
| 1584 | fatal("%s line %d: missing PermitOpen specification", |
| 1585 | filename, linenum); |
| 1586 | n = options->num_permitted_opens; /* modified later */ |
| 1587 | if (strcmp(arg, "any") == 0) { |
| 1588 | if (*activep && n == -1) { |
| 1589 | channel_clear_adm_permitted_opens(); |
| 1590 | options->num_permitted_opens = 0; |
| 1591 | } |
| 1592 | break; |
| 1593 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1594 | if (strcmp(arg, "none") == 0) { |
| 1595 | if (*activep && n == -1) { |
| 1596 | options->num_permitted_opens = 1; |
| 1597 | channel_disable_adm_local_opens(); |
| 1598 | } |
| 1599 | break; |
| 1600 | } |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1601 | if (*activep && n == -1) |
| 1602 | channel_clear_adm_permitted_opens(); |
| 1603 | for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) { |
| 1604 | p = hpdelim(&arg); |
| 1605 | if (p == NULL) |
| 1606 | fatal("%s line %d: missing host in PermitOpen", |
| 1607 | filename, linenum); |
| 1608 | p = cleanhostname(p); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1609 | if (arg == NULL || ((port = permitopen_port(arg)) < 0)) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1610 | fatal("%s line %d: bad port number in " |
| 1611 | "PermitOpen", filename, linenum); |
| 1612 | if (*activep && n == -1) |
| 1613 | options->num_permitted_opens = |
| 1614 | channel_add_adm_permitted_opens(p, port); |
| 1615 | } |
| 1616 | break; |
| 1617 | |
| 1618 | case sForceCommand: |
| 1619 | if (cp == NULL) |
| 1620 | fatal("%.200s line %d: Missing argument.", filename, |
| 1621 | linenum); |
| 1622 | len = strspn(cp, WHITESPACE); |
| 1623 | if (*activep && options->adm_forced_command == NULL) |
| 1624 | options->adm_forced_command = xstrdup(cp + len); |
| 1625 | return 0; |
| 1626 | |
| 1627 | case sChrootDirectory: |
| 1628 | charptr = &options->chroot_directory; |
| 1629 | |
| 1630 | arg = strdelim(&cp); |
| 1631 | if (!arg || *arg == '\0') |
| 1632 | fatal("%s line %d: missing file name.", |
| 1633 | filename, linenum); |
| 1634 | if (*activep && *charptr == NULL) |
| 1635 | *charptr = xstrdup(arg); |
| 1636 | break; |
| 1637 | |
| 1638 | case sTrustedUserCAKeys: |
| 1639 | charptr = &options->trusted_user_ca_keys; |
| 1640 | goto parse_filename; |
| 1641 | |
| 1642 | case sRevokedKeys: |
| 1643 | charptr = &options->revoked_keys_file; |
| 1644 | goto parse_filename; |
| 1645 | |
| 1646 | case sIPQoS: |
| 1647 | arg = strdelim(&cp); |
| 1648 | if ((value = parse_ipqos(arg)) == -1) |
| 1649 | fatal("%s line %d: Bad IPQoS value: %s", |
| 1650 | filename, linenum, arg); |
| 1651 | arg = strdelim(&cp); |
| 1652 | if (arg == NULL) |
| 1653 | value2 = value; |
| 1654 | else if ((value2 = parse_ipqos(arg)) == -1) |
| 1655 | fatal("%s line %d: Bad IPQoS value: %s", |
| 1656 | filename, linenum, arg); |
| 1657 | if (*activep) { |
| 1658 | options->ip_qos_interactive = value; |
| 1659 | options->ip_qos_bulk = value2; |
| 1660 | } |
| 1661 | break; |
| 1662 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1663 | case sVersionAddendum: |
| 1664 | if (cp == NULL) |
| 1665 | fatal("%.200s line %d: Missing argument.", filename, |
| 1666 | linenum); |
| 1667 | len = strspn(cp, WHITESPACE); |
| 1668 | if (*activep && options->version_addendum == NULL) { |
| 1669 | if (strcasecmp(cp + len, "none") == 0) |
| 1670 | options->version_addendum = xstrdup(""); |
| 1671 | else if (strchr(cp + len, '\r') != NULL) |
| 1672 | fatal("%.200s line %d: Invalid argument", |
| 1673 | filename, linenum); |
| 1674 | else |
| 1675 | options->version_addendum = xstrdup(cp + len); |
| 1676 | } |
| 1677 | return 0; |
| 1678 | |
| 1679 | case sAuthorizedKeysCommand: |
| 1680 | if (cp == NULL) |
| 1681 | fatal("%.200s line %d: Missing argument.", filename, |
| 1682 | linenum); |
| 1683 | len = strspn(cp, WHITESPACE); |
| 1684 | if (*activep && options->authorized_keys_command == NULL) { |
| 1685 | if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0) |
| 1686 | fatal("%.200s line %d: AuthorizedKeysCommand " |
| 1687 | "must be an absolute path", |
| 1688 | filename, linenum); |
| 1689 | options->authorized_keys_command = xstrdup(cp + len); |
| 1690 | } |
| 1691 | return 0; |
| 1692 | |
| 1693 | case sAuthorizedKeysCommandUser: |
| 1694 | charptr = &options->authorized_keys_command_user; |
| 1695 | |
| 1696 | arg = strdelim(&cp); |
| 1697 | if (!arg || *arg == '\0') |
| 1698 | fatal("%s line %d: missing AuthorizedKeysCommandUser " |
| 1699 | "argument.", filename, linenum); |
| 1700 | if (*activep && *charptr == NULL) |
| 1701 | *charptr = xstrdup(arg); |
| 1702 | break; |
| 1703 | |
| 1704 | case sAuthenticationMethods: |
| 1705 | if (*activep && options->num_auth_methods == 0) { |
| 1706 | while ((arg = strdelim(&cp)) && *arg != '\0') { |
| 1707 | if (options->num_auth_methods >= |
| 1708 | MAX_AUTH_METHODS) |
| 1709 | fatal("%s line %d: " |
| 1710 | "too many authentication methods.", |
| 1711 | filename, linenum); |
| 1712 | if (auth2_methods_valid(arg, 0) != 0) |
| 1713 | fatal("%s line %d: invalid " |
| 1714 | "authentication method list.", |
| 1715 | filename, linenum); |
| 1716 | options->auth_methods[ |
| 1717 | options->num_auth_methods++] = xstrdup(arg); |
| 1718 | } |
| 1719 | } |
| 1720 | return 0; |
| 1721 | |
| 1722 | case sStreamLocalBindMask: |
| 1723 | arg = strdelim(&cp); |
| 1724 | if (!arg || *arg == '\0') |
| 1725 | fatal("%s line %d: missing StreamLocalBindMask argument.", |
| 1726 | filename, linenum); |
| 1727 | /* Parse mode in octal format */ |
| 1728 | value = strtol(arg, &p, 8); |
| 1729 | if (arg == p || value < 0 || value > 0777) |
| 1730 | fatal("%s line %d: Bad mask.", filename, linenum); |
| 1731 | options->fwd_opts.streamlocal_bind_mask = (mode_t)value; |
| 1732 | break; |
| 1733 | |
| 1734 | case sStreamLocalBindUnlink: |
| 1735 | intptr = &options->fwd_opts.streamlocal_bind_unlink; |
| 1736 | goto parse_flag; |
| 1737 | |
| 1738 | case sFingerprintHash: |
| 1739 | arg = strdelim(&cp); |
| 1740 | if (!arg || *arg == '\0') |
| 1741 | fatal("%.200s line %d: Missing argument.", |
| 1742 | filename, linenum); |
| 1743 | if ((value = ssh_digest_alg_by_name(arg)) == -1) |
| 1744 | fatal("%.200s line %d: Invalid hash algorithm \"%s\".", |
| 1745 | filename, linenum, arg); |
| 1746 | if (*activep) |
| 1747 | options->fingerprint_hash = value; |
| 1748 | break; |
| 1749 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1750 | case sDeprecated: |
| 1751 | logit("%s line %d: Deprecated option %s", |
| 1752 | filename, linenum, arg); |
| 1753 | while (arg) |
| 1754 | arg = strdelim(&cp); |
| 1755 | break; |
| 1756 | |
| 1757 | case sUnsupported: |
| 1758 | logit("%s line %d: Unsupported option %s", |
| 1759 | filename, linenum, arg); |
| 1760 | while (arg) |
| 1761 | arg = strdelim(&cp); |
| 1762 | break; |
| 1763 | |
| 1764 | default: |
| 1765 | fatal("%s line %d: Missing handler for opcode %s (%d)", |
| 1766 | filename, linenum, arg, opcode); |
| 1767 | } |
| 1768 | if ((arg = strdelim(&cp)) != NULL && *arg != '\0') |
| 1769 | fatal("%s line %d: garbage at end of line; \"%.200s\".", |
| 1770 | filename, linenum, arg); |
| 1771 | return 0; |
| 1772 | } |
| 1773 | |
| 1774 | /* Reads the server configuration file. */ |
| 1775 | |
| 1776 | void |
| 1777 | load_server_config(const char *filename, Buffer *conf) |
| 1778 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1779 | char line[4096], *cp; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1780 | FILE *f; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1781 | int lineno = 0; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1782 | |
| 1783 | debug2("%s: filename %s", __func__, filename); |
| 1784 | if ((f = fopen(filename, "r")) == NULL) { |
| 1785 | perror(filename); |
| 1786 | exit(1); |
| 1787 | } |
| 1788 | buffer_clear(conf); |
| 1789 | while (fgets(line, sizeof(line), f)) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1790 | lineno++; |
| 1791 | if (strlen(line) == sizeof(line) - 1) |
| 1792 | fatal("%s line %d too long", filename, lineno); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1793 | /* |
| 1794 | * Trim out comments and strip whitespace |
| 1795 | * NB - preserve newlines, they are needed to reproduce |
| 1796 | * line numbers later for error messages |
| 1797 | */ |
| 1798 | if ((cp = strchr(line, '#')) != NULL) |
| 1799 | memcpy(cp, "\n", 2); |
| 1800 | cp = line + strspn(line, " \t\r"); |
| 1801 | |
| 1802 | buffer_append(conf, cp, strlen(cp)); |
| 1803 | } |
| 1804 | buffer_append(conf, "\0", 1); |
| 1805 | fclose(f); |
| 1806 | debug2("%s: done config len = %d", __func__, buffer_len(conf)); |
| 1807 | } |
| 1808 | |
| 1809 | void |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1810 | parse_server_match_config(ServerOptions *options, |
| 1811 | struct connection_info *connectinfo) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1812 | { |
| 1813 | ServerOptions mo; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1814 | #if defined(ANDROID) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1815 | char value[PROPERTY_VALUE_MAX]; |
| 1816 | #endif |
| 1817 | |
| 1818 | initialize_server_options(&mo); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1819 | parse_server_config(&mo, "reprocess config", &cfg, connectinfo); |
| 1820 | #if defined(ANDROID) |
| 1821 | /* Allow root login if ro.debuggable is set. */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1822 | property_get("ro.debuggable", value, ""); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1823 | if (strcmp(value, "1") == 0) { |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1824 | mo.permit_root_login = PERMIT_YES; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1825 | } |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1826 | #endif |
| 1827 | copy_set_server_options(options, &mo, 0); |
| 1828 | } |
| 1829 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1830 | int parse_server_match_testspec(struct connection_info *ci, char *spec) |
| 1831 | { |
| 1832 | char *p; |
| 1833 | |
| 1834 | while ((p = strsep(&spec, ",")) && *p != '\0') { |
| 1835 | if (strncmp(p, "addr=", 5) == 0) { |
| 1836 | ci->address = xstrdup(p + 5); |
| 1837 | } else if (strncmp(p, "host=", 5) == 0) { |
| 1838 | ci->host = xstrdup(p + 5); |
| 1839 | } else if (strncmp(p, "user=", 5) == 0) { |
| 1840 | ci->user = xstrdup(p + 5); |
| 1841 | } else if (strncmp(p, "laddr=", 6) == 0) { |
| 1842 | ci->laddress = xstrdup(p + 6); |
| 1843 | } else if (strncmp(p, "lport=", 6) == 0) { |
| 1844 | ci->lport = a2port(p + 6); |
| 1845 | if (ci->lport == -1) { |
| 1846 | fprintf(stderr, "Invalid port '%s' in test mode" |
| 1847 | " specification %s\n", p+6, p); |
| 1848 | return -1; |
| 1849 | } |
| 1850 | } else { |
| 1851 | fprintf(stderr, "Invalid test mode specification %s\n", |
| 1852 | p); |
| 1853 | return -1; |
| 1854 | } |
| 1855 | } |
| 1856 | return 0; |
| 1857 | } |
| 1858 | |
| 1859 | /* |
| 1860 | * returns 1 for a complete spec, 0 for partial spec and -1 for an |
| 1861 | * empty spec. |
| 1862 | */ |
| 1863 | int server_match_spec_complete(struct connection_info *ci) |
| 1864 | { |
| 1865 | if (ci->user && ci->host && ci->address) |
| 1866 | return 1; /* complete */ |
| 1867 | if (!ci->user && !ci->host && !ci->address) |
| 1868 | return -1; /* empty */ |
| 1869 | return 0; /* partial */ |
| 1870 | } |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1871 | |
| 1872 | /* |
| 1873 | * Copy any supported values that are set. |
| 1874 | * |
| 1875 | * If the preauth flag is set, we do not bother copying the string or |
| 1876 | * array values that are not used pre-authentication, because any that we |
| 1877 | * do use must be explictly sent in mm_getpwnamallow(). |
| 1878 | */ |
| 1879 | void |
| 1880 | copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth) |
| 1881 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1882 | #define M_CP_INTOPT(n) do {\ |
| 1883 | if (src->n != -1) \ |
| 1884 | dst->n = src->n; \ |
| 1885 | } while (0) |
| 1886 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1887 | M_CP_INTOPT(password_authentication); |
| 1888 | M_CP_INTOPT(gss_authentication); |
| 1889 | M_CP_INTOPT(rsa_authentication); |
| 1890 | M_CP_INTOPT(pubkey_authentication); |
| 1891 | M_CP_INTOPT(kerberos_authentication); |
| 1892 | M_CP_INTOPT(hostbased_authentication); |
| 1893 | M_CP_INTOPT(hostbased_uses_name_from_packet_only); |
| 1894 | M_CP_INTOPT(kbd_interactive_authentication); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1895 | M_CP_INTOPT(permit_root_login); |
| 1896 | M_CP_INTOPT(permit_empty_passwd); |
| 1897 | |
| 1898 | M_CP_INTOPT(allow_tcp_forwarding); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1899 | M_CP_INTOPT(allow_streamlocal_forwarding); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1900 | M_CP_INTOPT(allow_agent_forwarding); |
| 1901 | M_CP_INTOPT(permit_tun); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1902 | M_CP_INTOPT(fwd_opts.gateway_ports); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1903 | M_CP_INTOPT(x11_display_offset); |
| 1904 | M_CP_INTOPT(x11_forwarding); |
| 1905 | M_CP_INTOPT(x11_use_localhost); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1906 | M_CP_INTOPT(permit_tty); |
| 1907 | M_CP_INTOPT(permit_user_rc); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1908 | M_CP_INTOPT(max_sessions); |
| 1909 | M_CP_INTOPT(max_authtries); |
| 1910 | M_CP_INTOPT(ip_qos_interactive); |
| 1911 | M_CP_INTOPT(ip_qos_bulk); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1912 | M_CP_INTOPT(rekey_limit); |
| 1913 | M_CP_INTOPT(rekey_interval); |
| 1914 | |
| 1915 | /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */ |
| 1916 | #define M_CP_STROPT(n) do {\ |
| 1917 | if (src->n != NULL && dst->n != src->n) { \ |
| 1918 | free(dst->n); \ |
| 1919 | dst->n = src->n; \ |
| 1920 | } \ |
| 1921 | } while(0) |
| 1922 | #define M_CP_STRARRAYOPT(n, num_n) do {\ |
| 1923 | if (src->num_n != 0) { \ |
| 1924 | for (dst->num_n = 0; dst->num_n < src->num_n; dst->num_n++) \ |
| 1925 | dst->n[dst->num_n] = xstrdup(src->n[dst->num_n]); \ |
| 1926 | } \ |
| 1927 | } while(0) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1928 | |
| 1929 | /* See comment in servconf.h */ |
| 1930 | COPY_MATCH_STRING_OPTS(); |
| 1931 | |
| 1932 | /* |
| 1933 | * The only things that should be below this point are string options |
| 1934 | * which are only used after authentication. |
| 1935 | */ |
| 1936 | if (preauth) |
| 1937 | return; |
| 1938 | |
| 1939 | M_CP_STROPT(adm_forced_command); |
| 1940 | M_CP_STROPT(chroot_directory); |
| 1941 | } |
| 1942 | |
| 1943 | #undef M_CP_INTOPT |
| 1944 | #undef M_CP_STROPT |
| 1945 | #undef M_CP_STRARRAYOPT |
| 1946 | |
| 1947 | void |
| 1948 | parse_server_config(ServerOptions *options, const char *filename, Buffer *conf, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1949 | struct connection_info *connectinfo) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1950 | { |
| 1951 | int active, linenum, bad_options = 0; |
| 1952 | char *cp, *obuf, *cbuf; |
| 1953 | |
| 1954 | debug2("%s: config %s len %d", __func__, filename, buffer_len(conf)); |
| 1955 | |
| 1956 | obuf = cbuf = xstrdup(buffer_ptr(conf)); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1957 | active = connectinfo ? 0 : 1; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1958 | linenum = 1; |
| 1959 | while ((cp = strsep(&cbuf, "\n")) != NULL) { |
| 1960 | if (process_server_config_line(options, cp, filename, |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1961 | linenum++, &active, connectinfo) != 0) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1962 | bad_options++; |
| 1963 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1964 | free(obuf); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1965 | if (bad_options > 0) |
| 1966 | fatal("%s: terminating, %d bad configuration options", |
| 1967 | filename, bad_options); |
| 1968 | } |
| 1969 | |
| 1970 | static const char * |
| 1971 | fmt_multistate_int(int val, const struct multistate *m) |
| 1972 | { |
| 1973 | u_int i; |
| 1974 | |
| 1975 | for (i = 0; m[i].key != NULL; i++) { |
| 1976 | if (m[i].value == val) |
| 1977 | return m[i].key; |
| 1978 | } |
| 1979 | return "UNKNOWN"; |
| 1980 | } |
| 1981 | |
| 1982 | static const char * |
| 1983 | fmt_intarg(ServerOpCodes code, int val) |
| 1984 | { |
| 1985 | if (val == -1) |
| 1986 | return "unset"; |
| 1987 | switch (code) { |
| 1988 | case sAddressFamily: |
| 1989 | return fmt_multistate_int(val, multistate_addressfamily); |
| 1990 | case sPermitRootLogin: |
| 1991 | return fmt_multistate_int(val, multistate_permitrootlogin); |
| 1992 | case sGatewayPorts: |
| 1993 | return fmt_multistate_int(val, multistate_gatewayports); |
| 1994 | case sCompression: |
| 1995 | return fmt_multistate_int(val, multistate_compression); |
| 1996 | case sUsePrivilegeSeparation: |
| 1997 | return fmt_multistate_int(val, multistate_privsep); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1998 | case sAllowTcpForwarding: |
| 1999 | return fmt_multistate_int(val, multistate_tcpfwd); |
| 2000 | case sAllowStreamLocalForwarding: |
| 2001 | return fmt_multistate_int(val, multistate_tcpfwd); |
| 2002 | case sFingerprintHash: |
| 2003 | return ssh_digest_alg_name(val); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2004 | case sProtocol: |
| 2005 | switch (val) { |
| 2006 | case SSH_PROTO_1: |
| 2007 | return "1"; |
| 2008 | case SSH_PROTO_2: |
| 2009 | return "2"; |
| 2010 | case (SSH_PROTO_1|SSH_PROTO_2): |
| 2011 | return "2,1"; |
| 2012 | default: |
| 2013 | return "UNKNOWN"; |
| 2014 | } |
| 2015 | default: |
| 2016 | switch (val) { |
| 2017 | case 0: |
| 2018 | return "no"; |
| 2019 | case 1: |
| 2020 | return "yes"; |
| 2021 | default: |
| 2022 | return "UNKNOWN"; |
| 2023 | } |
| 2024 | } |
| 2025 | } |
| 2026 | |
| 2027 | static const char * |
| 2028 | lookup_opcode_name(ServerOpCodes code) |
| 2029 | { |
| 2030 | u_int i; |
| 2031 | |
| 2032 | for (i = 0; keywords[i].name != NULL; i++) |
| 2033 | if (keywords[i].opcode == code) |
| 2034 | return(keywords[i].name); |
| 2035 | return "UNKNOWN"; |
| 2036 | } |
| 2037 | |
| 2038 | static void |
| 2039 | dump_cfg_int(ServerOpCodes code, int val) |
| 2040 | { |
| 2041 | printf("%s %d\n", lookup_opcode_name(code), val); |
| 2042 | } |
| 2043 | |
| 2044 | static void |
| 2045 | dump_cfg_fmtint(ServerOpCodes code, int val) |
| 2046 | { |
| 2047 | printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val)); |
| 2048 | } |
| 2049 | |
| 2050 | static void |
| 2051 | dump_cfg_string(ServerOpCodes code, const char *val) |
| 2052 | { |
| 2053 | if (val == NULL) |
| 2054 | return; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 2055 | printf("%s %s\n", lookup_opcode_name(code), |
| 2056 | val == NULL ? "none" : val); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2057 | } |
| 2058 | |
| 2059 | static void |
| 2060 | dump_cfg_strarray(ServerOpCodes code, u_int count, char **vals) |
| 2061 | { |
| 2062 | u_int i; |
| 2063 | |
| 2064 | for (i = 0; i < count; i++) |
| 2065 | printf("%s %s\n", lookup_opcode_name(code), vals[i]); |
| 2066 | } |
| 2067 | |
| 2068 | static void |
| 2069 | dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals) |
| 2070 | { |
| 2071 | u_int i; |
| 2072 | |
| 2073 | printf("%s", lookup_opcode_name(code)); |
| 2074 | for (i = 0; i < count; i++) |
| 2075 | printf(" %s", vals[i]); |
| 2076 | printf("\n"); |
| 2077 | } |
| 2078 | |
| 2079 | void |
| 2080 | dump_config(ServerOptions *o) |
| 2081 | { |
| 2082 | u_int i; |
| 2083 | int ret; |
| 2084 | struct addrinfo *ai; |
| 2085 | char addr[NI_MAXHOST], port[NI_MAXSERV], *s = NULL; |
| 2086 | |
| 2087 | /* these are usually at the top of the config */ |
| 2088 | for (i = 0; i < o->num_ports; i++) |
| 2089 | printf("port %d\n", o->ports[i]); |
| 2090 | dump_cfg_fmtint(sProtocol, o->protocol); |
| 2091 | dump_cfg_fmtint(sAddressFamily, o->address_family); |
| 2092 | |
| 2093 | /* ListenAddress must be after Port */ |
| 2094 | for (ai = o->listen_addrs; ai; ai = ai->ai_next) { |
| 2095 | if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, |
| 2096 | sizeof(addr), port, sizeof(port), |
| 2097 | NI_NUMERICHOST|NI_NUMERICSERV)) != 0) { |
| 2098 | error("getnameinfo failed: %.100s", |
| 2099 | (ret != EAI_SYSTEM) ? gai_strerror(ret) : |
| 2100 | strerror(errno)); |
| 2101 | } else { |
| 2102 | if (ai->ai_family == AF_INET6) |
| 2103 | printf("listenaddress [%s]:%s\n", addr, port); |
| 2104 | else |
| 2105 | printf("listenaddress %s:%s\n", addr, port); |
| 2106 | } |
| 2107 | } |
| 2108 | |
| 2109 | /* integer arguments */ |
| 2110 | #ifdef USE_PAM |
| 2111 | dump_cfg_int(sUsePAM, o->use_pam); |
| 2112 | #endif |
| 2113 | dump_cfg_int(sServerKeyBits, o->server_key_bits); |
| 2114 | dump_cfg_int(sLoginGraceTime, o->login_grace_time); |
| 2115 | dump_cfg_int(sKeyRegenerationTime, o->key_regeneration_time); |
| 2116 | dump_cfg_int(sX11DisplayOffset, o->x11_display_offset); |
| 2117 | dump_cfg_int(sMaxAuthTries, o->max_authtries); |
| 2118 | dump_cfg_int(sMaxSessions, o->max_sessions); |
| 2119 | dump_cfg_int(sClientAliveInterval, o->client_alive_interval); |
| 2120 | dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max); |
| 2121 | |
| 2122 | /* formatted integer arguments */ |
| 2123 | dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login); |
| 2124 | dump_cfg_fmtint(sIgnoreRhosts, o->ignore_rhosts); |
| 2125 | dump_cfg_fmtint(sIgnoreUserKnownHosts, o->ignore_user_known_hosts); |
| 2126 | dump_cfg_fmtint(sRhostsRSAAuthentication, o->rhosts_rsa_authentication); |
| 2127 | dump_cfg_fmtint(sHostbasedAuthentication, o->hostbased_authentication); |
| 2128 | dump_cfg_fmtint(sHostbasedUsesNameFromPacketOnly, |
| 2129 | o->hostbased_uses_name_from_packet_only); |
| 2130 | dump_cfg_fmtint(sRSAAuthentication, o->rsa_authentication); |
| 2131 | dump_cfg_fmtint(sPubkeyAuthentication, o->pubkey_authentication); |
| 2132 | #ifdef KRB5 |
| 2133 | dump_cfg_fmtint(sKerberosAuthentication, o->kerberos_authentication); |
| 2134 | dump_cfg_fmtint(sKerberosOrLocalPasswd, o->kerberos_or_local_passwd); |
| 2135 | dump_cfg_fmtint(sKerberosTicketCleanup, o->kerberos_ticket_cleanup); |
| 2136 | # ifdef USE_AFS |
| 2137 | dump_cfg_fmtint(sKerberosGetAFSToken, o->kerberos_get_afs_token); |
| 2138 | # endif |
| 2139 | #endif |
| 2140 | #ifdef GSSAPI |
| 2141 | dump_cfg_fmtint(sGssAuthentication, o->gss_authentication); |
| 2142 | dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds); |
| 2143 | #endif |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2144 | dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication); |
| 2145 | dump_cfg_fmtint(sKbdInteractiveAuthentication, |
| 2146 | o->kbd_interactive_authentication); |
| 2147 | dump_cfg_fmtint(sChallengeResponseAuthentication, |
| 2148 | o->challenge_response_authentication); |
| 2149 | dump_cfg_fmtint(sPrintMotd, o->print_motd); |
| 2150 | dump_cfg_fmtint(sPrintLastLog, o->print_lastlog); |
| 2151 | dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding); |
| 2152 | dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 2153 | dump_cfg_fmtint(sPermitTTY, o->permit_tty); |
| 2154 | dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2155 | dump_cfg_fmtint(sStrictModes, o->strict_modes); |
| 2156 | dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive); |
| 2157 | dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd); |
| 2158 | dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env); |
| 2159 | dump_cfg_fmtint(sUseLogin, o->use_login); |
| 2160 | dump_cfg_fmtint(sCompression, o->compression); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 2161 | dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2162 | dump_cfg_fmtint(sUseDNS, o->use_dns); |
| 2163 | dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 2164 | dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2165 | dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 2166 | dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2167 | |
| 2168 | /* string arguments */ |
| 2169 | dump_cfg_string(sPidFile, o->pid_file); |
| 2170 | dump_cfg_string(sXAuthLocation, o->xauth_location); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 2171 | dump_cfg_string(sCiphers, o->ciphers ? o->ciphers : KEX_SERVER_ENCRYPT); |
| 2172 | dump_cfg_string(sMacs, o->macs ? o->macs : KEX_SERVER_MAC); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2173 | dump_cfg_string(sBanner, o->banner); |
| 2174 | dump_cfg_string(sForceCommand, o->adm_forced_command); |
| 2175 | dump_cfg_string(sChrootDirectory, o->chroot_directory); |
| 2176 | dump_cfg_string(sTrustedUserCAKeys, o->trusted_user_ca_keys); |
| 2177 | dump_cfg_string(sRevokedKeys, o->revoked_keys_file); |
| 2178 | dump_cfg_string(sAuthorizedPrincipalsFile, |
| 2179 | o->authorized_principals_file); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 2180 | dump_cfg_string(sVersionAddendum, o->version_addendum); |
| 2181 | dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command); |
| 2182 | dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user); |
| 2183 | dump_cfg_string(sHostKeyAgent, o->host_key_agent); |
| 2184 | dump_cfg_string(sKexAlgorithms, |
| 2185 | o->kex_algorithms ? o->kex_algorithms : KEX_SERVER_KEX); |
| 2186 | dump_cfg_string(sHostbasedAcceptedKeyTypes, o->hostbased_key_types ? |
| 2187 | o->hostbased_key_types : KEX_DEFAULT_PK_ALG); |
| 2188 | dump_cfg_string(sPubkeyAcceptedKeyTypes, o->pubkey_key_types ? |
| 2189 | o->pubkey_key_types : KEX_DEFAULT_PK_ALG); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2190 | |
| 2191 | /* string arguments requiring a lookup */ |
| 2192 | dump_cfg_string(sLogLevel, log_level_name(o->log_level)); |
| 2193 | dump_cfg_string(sLogFacility, log_facility_name(o->log_facility)); |
| 2194 | |
| 2195 | /* string array arguments */ |
| 2196 | dump_cfg_strarray_oneline(sAuthorizedKeysFile, o->num_authkeys_files, |
| 2197 | o->authorized_keys_files); |
| 2198 | dump_cfg_strarray(sHostKeyFile, o->num_host_key_files, |
| 2199 | o->host_key_files); |
| 2200 | dump_cfg_strarray(sHostKeyFile, o->num_host_cert_files, |
| 2201 | o->host_cert_files); |
| 2202 | dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users); |
| 2203 | dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users); |
| 2204 | dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups); |
| 2205 | dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups); |
| 2206 | dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 2207 | dump_cfg_strarray_oneline(sAuthenticationMethods, |
| 2208 | o->num_auth_methods, o->auth_methods); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2209 | |
| 2210 | /* other arguments */ |
| 2211 | for (i = 0; i < o->num_subsystems; i++) |
| 2212 | printf("subsystem %s %s\n", o->subsystem_name[i], |
| 2213 | o->subsystem_args[i]); |
| 2214 | |
| 2215 | printf("maxstartups %d:%d:%d\n", o->max_startups_begin, |
| 2216 | o->max_startups_rate, o->max_startups); |
| 2217 | |
| 2218 | for (i = 0; tunmode_desc[i].val != -1; i++) |
| 2219 | if (tunmode_desc[i].val == o->permit_tun) { |
| 2220 | s = tunmode_desc[i].text; |
| 2221 | break; |
| 2222 | } |
| 2223 | dump_cfg_string(sPermitTunnel, s); |
| 2224 | |
| 2225 | printf("ipqos %s ", iptos2str(o->ip_qos_interactive)); |
| 2226 | printf("%s\n", iptos2str(o->ip_qos_bulk)); |
| 2227 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 2228 | printf("rekeylimit %lld %d\n", (long long)o->rekey_limit, |
| 2229 | o->rekey_interval); |
| 2230 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2231 | channel_print_adm_permitted_opens(); |
| 2232 | } |