Annotation of src/usr.bin/ssh/servconf.c, Revision 1.163
1.163 ! stevesk 1: /* $OpenBSD: servconf.c,v 1.162 2006/08/01 23:22:47 stevesk Exp $ */
1.1 deraadt 2: /*
1.26 deraadt 3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
1.34 markus 5: *
1.51 deraadt 6: * As far as I am concerned, the code I have written for this software
7: * can be used freely for any purpose. Any derived versions of this
8: * software must be clearly marked as such, and if the derived work is
9: * incompatible with the protocol description in the RFC file, it must be
10: * called by a name other than "ssh" or "Secure Shell".
1.26 deraadt 11: */
1.1 deraadt 12:
13: #include "includes.h"
1.152 stevesk 14:
15: #include <sys/types.h>
16: #include <sys/socket.h>
1.154 stevesk 17:
18: #include <netdb.h>
1.162 stevesk 19: #include <stdio.h>
1.161 stevesk 20: #include <stdlib.h>
1.160 stevesk 21: #include <string.h>
1.155 stevesk 22: #include <unistd.h>
1.1 deraadt 23:
24: #include "ssh.h"
1.62 markus 25: #include "log.h"
1.1 deraadt 26: #include "servconf.h"
27: #include "xmalloc.h"
1.33 markus 28: #include "compat.h"
1.60 markus 29: #include "pathnames.h"
1.62 markus 30: #include "misc.h"
31: #include "cipher.h"
1.66 markus 32: #include "kex.h"
33: #include "mac.h"
1.153 dtucker 34: #include "match.h"
1.156 dtucker 35: #include "channels.h"
1.1 deraadt 36:
1.84 itojun 37: static void add_listen_addr(ServerOptions *, char *, u_short);
38: static void add_one_listen_addr(ServerOptions *, char *, u_short);
1.29 markus 39:
1.102 provos 40: /* Use of privilege separation or not */
41: extern int use_privsep;
1.153 dtucker 42: extern Buffer cfg;
1.62 markus 43:
1.1 deraadt 44: /* Initializes the server options to their default values. */
45:
1.34 markus 46: void
1.25 markus 47: initialize_server_options(ServerOptions *options)
1.1 deraadt 48: {
1.25 markus 49: memset(options, 0, sizeof(*options));
1.29 markus 50: options->num_ports = 0;
51: options->ports_from_cmdline = 0;
52: options->listen_addrs = NULL;
1.138 djm 53: options->address_family = -1;
1.54 markus 54: options->num_host_key_files = 0;
1.36 markus 55: options->pid_file = NULL;
1.25 markus 56: options->server_key_bits = -1;
57: options->login_grace_time = -1;
58: options->key_regeneration_time = -1;
1.67 markus 59: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 60: options->ignore_rhosts = -1;
61: options->ignore_user_known_hosts = -1;
62: options->print_motd = -1;
1.72 stevesk 63: options->print_lastlog = -1;
1.25 markus 64: options->x11_forwarding = -1;
65: options->x11_display_offset = -1;
1.99 stevesk 66: options->x11_use_localhost = -1;
1.42 markus 67: options->xauth_location = NULL;
1.25 markus 68: options->strict_modes = -1;
1.129 markus 69: options->tcp_keep_alive = -1;
1.101 markus 70: options->log_facility = SYSLOG_FACILITY_NOT_SET;
71: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 72: options->rhosts_rsa_authentication = -1;
1.75 markus 73: options->hostbased_authentication = -1;
74: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 75: options->rsa_authentication = -1;
1.54 markus 76: options->pubkey_authentication = -1;
1.25 markus 77: options->kerberos_authentication = -1;
78: options->kerberos_or_local_passwd = -1;
79: options->kerberos_ticket_cleanup = -1;
1.130 jakob 80: options->kerberos_get_afs_token = -1;
1.125 markus 81: options->gss_authentication=-1;
82: options->gss_cleanup_creds = -1;
1.25 markus 83: options->password_authentication = -1;
1.52 markus 84: options->kbd_interactive_authentication = -1;
1.80 markus 85: options->challenge_response_authentication = -1;
1.25 markus 86: options->permit_empty_passwd = -1;
1.113 markus 87: options->permit_user_env = -1;
1.25 markus 88: options->use_login = -1;
1.111 markus 89: options->compression = -1;
1.53 markus 90: options->allow_tcp_forwarding = -1;
1.25 markus 91: options->num_allow_users = 0;
92: options->num_deny_users = 0;
93: options->num_allow_groups = 0;
94: options->num_deny_groups = 0;
1.33 markus 95: options->ciphers = NULL;
1.66 markus 96: options->macs = NULL;
1.33 markus 97: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 98: options->gateway_ports = -1;
1.43 jakob 99: options->num_subsystems = 0;
1.50 markus 100: options->max_startups_begin = -1;
101: options->max_startups_rate = -1;
1.46 markus 102: options->max_startups = -1;
1.133 dtucker 103: options->max_authtries = -1;
1.57 markus 104: options->banner = NULL;
1.122 markus 105: options->use_dns = -1;
1.77 beck 106: options->client_alive_interval = -1;
107: options->client_alive_count_max = -1;
1.82 markus 108: options->authorized_keys_file = NULL;
109: options->authorized_keys_file2 = NULL;
1.131 djm 110: options->num_accept_env = 0;
1.145 reyk 111: options->permit_tun = -1;
1.159 dtucker 112: options->num_permitted_opens = -1;
1.158 dtucker 113: options->adm_forced_command = NULL;
1.1 deraadt 114: }
115:
1.34 markus 116: void
1.25 markus 117: fill_default_server_options(ServerOptions *options)
1.1 deraadt 118: {
1.54 markus 119: if (options->protocol == SSH_PROTO_UNKNOWN)
120: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
121: if (options->num_host_key_files == 0) {
122: /* fill default hostkeys for protocols */
123: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 124: options->host_key_files[options->num_host_key_files++] =
125: _PATH_HOST_KEY_FILE;
126: if (options->protocol & SSH_PROTO_2) {
127: options->host_key_files[options->num_host_key_files++] =
128: _PATH_HOST_RSA_KEY_FILE;
129: options->host_key_files[options->num_host_key_files++] =
130: _PATH_HOST_DSA_KEY_FILE;
131: }
1.54 markus 132: }
1.29 markus 133: if (options->num_ports == 0)
134: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
135: if (options->listen_addrs == NULL)
1.76 stevesk 136: add_listen_addr(options, NULL, 0);
1.36 markus 137: if (options->pid_file == NULL)
1.60 markus 138: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 139: if (options->server_key_bits == -1)
140: options->server_key_bits = 768;
141: if (options->login_grace_time == -1)
1.115 stevesk 142: options->login_grace_time = 120;
1.25 markus 143: if (options->key_regeneration_time == -1)
144: options->key_regeneration_time = 3600;
1.67 markus 145: if (options->permit_root_login == PERMIT_NOT_SET)
146: options->permit_root_login = PERMIT_YES;
1.25 markus 147: if (options->ignore_rhosts == -1)
1.30 markus 148: options->ignore_rhosts = 1;
1.25 markus 149: if (options->ignore_user_known_hosts == -1)
150: options->ignore_user_known_hosts = 0;
151: if (options->print_motd == -1)
152: options->print_motd = 1;
1.72 stevesk 153: if (options->print_lastlog == -1)
154: options->print_lastlog = 1;
1.25 markus 155: if (options->x11_forwarding == -1)
1.30 markus 156: options->x11_forwarding = 0;
1.25 markus 157: if (options->x11_display_offset == -1)
1.30 markus 158: options->x11_display_offset = 10;
1.99 stevesk 159: if (options->x11_use_localhost == -1)
160: options->x11_use_localhost = 1;
1.42 markus 161: if (options->xauth_location == NULL)
1.83 markus 162: options->xauth_location = _PATH_XAUTH;
1.25 markus 163: if (options->strict_modes == -1)
164: options->strict_modes = 1;
1.129 markus 165: if (options->tcp_keep_alive == -1)
166: options->tcp_keep_alive = 1;
1.101 markus 167: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 168: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 169: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 170: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 171: if (options->rhosts_rsa_authentication == -1)
1.30 markus 172: options->rhosts_rsa_authentication = 0;
1.75 markus 173: if (options->hostbased_authentication == -1)
174: options->hostbased_authentication = 0;
175: if (options->hostbased_uses_name_from_packet_only == -1)
176: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 177: if (options->rsa_authentication == -1)
178: options->rsa_authentication = 1;
1.54 markus 179: if (options->pubkey_authentication == -1)
180: options->pubkey_authentication = 1;
1.25 markus 181: if (options->kerberos_authentication == -1)
1.107 markus 182: options->kerberos_authentication = 0;
1.25 markus 183: if (options->kerberos_or_local_passwd == -1)
184: options->kerberos_or_local_passwd = 1;
185: if (options->kerberos_ticket_cleanup == -1)
186: options->kerberos_ticket_cleanup = 1;
1.130 jakob 187: if (options->kerberos_get_afs_token == -1)
188: options->kerberos_get_afs_token = 0;
1.125 markus 189: if (options->gss_authentication == -1)
190: options->gss_authentication = 0;
191: if (options->gss_cleanup_creds == -1)
192: options->gss_cleanup_creds = 1;
1.25 markus 193: if (options->password_authentication == -1)
194: options->password_authentication = 1;
1.52 markus 195: if (options->kbd_interactive_authentication == -1)
196: options->kbd_interactive_authentication = 0;
1.80 markus 197: if (options->challenge_response_authentication == -1)
198: options->challenge_response_authentication = 1;
1.25 markus 199: if (options->permit_empty_passwd == -1)
1.30 markus 200: options->permit_empty_passwd = 0;
1.113 markus 201: if (options->permit_user_env == -1)
202: options->permit_user_env = 0;
1.25 markus 203: if (options->use_login == -1)
204: options->use_login = 0;
1.111 markus 205: if (options->compression == -1)
1.143 markus 206: options->compression = COMP_DELAYED;
1.53 markus 207: if (options->allow_tcp_forwarding == -1)
208: options->allow_tcp_forwarding = 1;
1.38 markus 209: if (options->gateway_ports == -1)
210: options->gateway_ports = 0;
1.46 markus 211: if (options->max_startups == -1)
212: options->max_startups = 10;
1.50 markus 213: if (options->max_startups_rate == -1)
214: options->max_startups_rate = 100; /* 100% */
215: if (options->max_startups_begin == -1)
216: options->max_startups_begin = options->max_startups;
1.133 dtucker 217: if (options->max_authtries == -1)
218: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.122 markus 219: if (options->use_dns == -1)
220: options->use_dns = 1;
1.77 beck 221: if (options->client_alive_interval == -1)
1.95 deraadt 222: options->client_alive_interval = 0;
1.77 beck 223: if (options->client_alive_count_max == -1)
224: options->client_alive_count_max = 3;
1.90 markus 225: if (options->authorized_keys_file2 == NULL) {
226: /* authorized_keys_file2 falls back to authorized_keys_file */
227: if (options->authorized_keys_file != NULL)
228: options->authorized_keys_file2 = options->authorized_keys_file;
229: else
230: options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2;
231: }
232: if (options->authorized_keys_file == NULL)
233: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.145 reyk 234: if (options->permit_tun == -1)
1.146 reyk 235: options->permit_tun = SSH_TUNMODE_NO;
1.102 provos 236:
1.110 markus 237: /* Turn privilege separation on by default */
1.102 provos 238: if (use_privsep == -1)
1.110 markus 239: use_privsep = 1;
1.1 deraadt 240: }
241:
242: /* Keyword tokens. */
1.25 markus 243: typedef enum {
244: sBadOption, /* == unknown option */
245: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
246: sPermitRootLogin, sLogFacility, sLogLevel,
1.124 markus 247: sRhostsRSAAuthentication, sRSAAuthentication,
1.25 markus 248: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.130 jakob 249: sKerberosGetAFSToken,
1.123 markus 250: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.138 djm 251: sPasswordAuthentication, sKbdInteractiveAuthentication,
252: sListenAddress, sAddressFamily,
1.72 stevesk 253: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 254: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.129 markus 255: sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.113 markus 256: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.53 markus 257: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 258: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.133 dtucker 259: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem,
260: sMaxStartups, sMaxAuthTries,
1.122 markus 261: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 262: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 263: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
1.145 reyk 264: sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel,
1.158 dtucker 265: sMatch, sPermitOpen, sForceCommand,
1.105 stevesk 266: sUsePrivilegeSeparation,
1.121 jakob 267: sDeprecated, sUnsupported
1.1 deraadt 268: } ServerOpCodes;
269:
1.153 dtucker 270: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */
271: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
272: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
273:
1.1 deraadt 274: /* Textual representation of the tokens. */
1.25 markus 275: static struct {
276: const char *name;
277: ServerOpCodes opcode;
1.153 dtucker 278: u_int flags;
1.25 markus 279: } keywords[] = {
1.153 dtucker 280: { "port", sPort, SSHCFG_GLOBAL },
281: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
282: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
283: { "pidfile", sPidFile, SSHCFG_GLOBAL },
284: { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL },
285: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
286: { "keyregenerationinterval", sKeyRegenerationTime, SSHCFG_GLOBAL },
287: { "permitrootlogin", sPermitRootLogin, SSHCFG_GLOBAL },
288: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
289: { "loglevel", sLogLevel, SSHCFG_GLOBAL },
290: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
291: { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_GLOBAL },
292: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_GLOBAL },
293: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_GLOBAL },
294: { "rsaauthentication", sRSAAuthentication, SSHCFG_GLOBAL },
295: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL },
296: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 297: #ifdef KRB5
1.153 dtucker 298: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_GLOBAL },
299: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
300: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
301: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 302: #else
1.153 dtucker 303: { "kerberosauthentication", sUnsupported, SSHCFG_GLOBAL },
304: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
305: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
306: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 307: #endif
1.153 dtucker 308: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
309: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 310: #ifdef GSSAPI
1.153 dtucker 311: { "gssapiauthentication", sGssAuthentication, SSHCFG_GLOBAL },
312: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.125 markus 313: #else
1.153 dtucker 314: { "gssapiauthentication", sUnsupported, SSHCFG_GLOBAL },
315: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 316: #endif
1.153 dtucker 317: { "passwordauthentication", sPasswordAuthentication, SSHCFG_GLOBAL },
318: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_GLOBAL },
319: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
320: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
321: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
322: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
323: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
324: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
325: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
326: { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL },
327: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 328: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
329: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
330: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 331: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
332: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
333: { "permitemptypasswords", sEmptyPasswd, SSHCFG_GLOBAL },
334: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
335: { "uselogin", sUseLogin, SSHCFG_GLOBAL },
336: { "compression", sCompression, SSHCFG_GLOBAL },
337: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
338: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
339: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
340: { "allowusers", sAllowUsers, SSHCFG_GLOBAL },
341: { "denyusers", sDenyUsers, SSHCFG_GLOBAL },
342: { "allowgroups", sAllowGroups, SSHCFG_GLOBAL },
343: { "denygroups", sDenyGroups, SSHCFG_GLOBAL },
344: { "ciphers", sCiphers, SSHCFG_GLOBAL },
345: { "macs", sMacs, SSHCFG_GLOBAL },
346: { "protocol", sProtocol, SSHCFG_GLOBAL },
347: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
348: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
349: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
350: { "maxauthtries", sMaxAuthTries, SSHCFG_GLOBAL },
351: { "banner", sBanner, SSHCFG_GLOBAL },
352: { "usedns", sUseDNS, SSHCFG_GLOBAL },
353: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
354: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
355: { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL },
356: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL },
357: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_GLOBAL },
358: { "authorizedkeysfile2", sAuthorizedKeysFile2, SSHCFG_GLOBAL },
359: { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL},
360: { "acceptenv", sAcceptEnv, SSHCFG_GLOBAL },
361: { "permittunnel", sPermitTunnel, SSHCFG_GLOBAL },
362: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 363: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.158 dtucker 364: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.153 dtucker 365: { NULL, sBadOption, 0 }
1.1 deraadt 366: };
367:
1.27 markus 368: /*
1.73 stevesk 369: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 370: */
1.1 deraadt 371:
1.34 markus 372: static ServerOpCodes
1.25 markus 373: parse_token(const char *cp, const char *filename,
1.153 dtucker 374: int linenum, u_int *flags)
1.1 deraadt 375: {
1.55 markus 376: u_int i;
1.1 deraadt 377:
1.25 markus 378: for (i = 0; keywords[i].name; i++)
1.153 dtucker 379: if (strcasecmp(cp, keywords[i].name) == 0) {
380: *flags = keywords[i].flags;
1.25 markus 381: return keywords[i].opcode;
1.153 dtucker 382: }
1.25 markus 383:
1.78 stevesk 384: error("%s: line %d: Bad configuration option: %s",
385: filename, linenum, cp);
1.25 markus 386: return sBadOption;
1.1 deraadt 387: }
388:
1.84 itojun 389: static void
1.76 stevesk 390: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 391: {
1.142 djm 392: u_int i;
1.74 stevesk 393:
394: if (options->num_ports == 0)
395: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.138 djm 396: if (options->address_family == -1)
397: options->address_family = AF_UNSPEC;
1.76 stevesk 398: if (port == 0)
1.74 stevesk 399: for (i = 0; i < options->num_ports; i++)
400: add_one_listen_addr(options, addr, options->ports[i]);
401: else
1.76 stevesk 402: add_one_listen_addr(options, addr, port);
1.74 stevesk 403: }
404:
1.84 itojun 405: static void
1.74 stevesk 406: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 407: {
408: struct addrinfo hints, *ai, *aitop;
409: char strport[NI_MAXSERV];
410: int gaierr;
411:
1.74 stevesk 412: memset(&hints, 0, sizeof(hints));
1.138 djm 413: hints.ai_family = options->address_family;
1.74 stevesk 414: hints.ai_socktype = SOCK_STREAM;
415: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.112 deraadt 416: snprintf(strport, sizeof strport, "%u", port);
1.74 stevesk 417: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
418: fatal("bad addr or host: %s (%s)",
419: addr ? addr : "<NULL>",
420: gai_strerror(gaierr));
421: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
422: ;
423: ai->ai_next = options->listen_addrs;
424: options->listen_addrs = aitop;
1.29 markus 425: }
426:
1.153 dtucker 427: /*
428: * The strategy for the Match blocks is that the config file is parsed twice.
429: *
430: * The first time is at startup. activep is initialized to 1 and the
431: * directives in the global context are processed and acted on. Hitting a
432: * Match directive unsets activep and the directives inside the block are
433: * checked for syntax only.
434: *
435: * The second time is after a connection has been established but before
436: * authentication. activep is initialized to 2 and global config directives
437: * are ignored since they have already been processed. If the criteria in a
438: * Match block is met, activep is set and the subsequent directives
439: * processed and actioned until EOF or another Match block unsets it. Any
440: * options set are copied into the main server config.
441: *
442: * Potential additions/improvements:
443: * - Add Match support for pre-kex directives, eg Protocol, Ciphers.
444: *
445: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
446: * Match Address 192.168.0.*
447: * Tag trusted
448: * Match Group wheel
449: * Tag trusted
450: * Match Tag trusted
451: * AllowTcpForwarding yes
452: * GatewayPorts clientspecified
453: * [...]
454: *
455: * - Add a PermittedChannelRequests directive
456: * Match Group shell
457: * PermittedChannelRequests session,forwarded-tcpip
458: */
459:
460: static int
461: match_cfg_line(char **condition, int line, const char *user, const char *host,
462: const char *address)
463: {
464: int result = 1;
465: char *arg, *attrib, *cp = *condition;
466: size_t len;
467:
468: if (user == NULL)
469: debug3("checking syntax for 'Match %s'", cp);
470: else
471: debug3("checking match for '%s' user %s host %s addr %s", cp,
472: user ? user : "(null)", host ? host : "(null)",
473: address ? address : "(null)");
474:
475: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
476: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
477: error("Missing Match criteria for %s", attrib);
478: return -1;
479: }
480: len = strlen(arg);
481: if (strcasecmp(attrib, "user") == 0) {
482: if (!user) {
483: result = 0;
484: continue;
485: }
486: if (match_pattern_list(user, arg, len, 0) != 1)
487: result = 0;
488: else
489: debug("user %.100s matched 'User %.100s' at "
490: "line %d", user, arg, line);
491: } else if (strcasecmp(attrib, "host") == 0) {
492: if (!host) {
493: result = 0;
494: continue;
495: }
496: if (match_hostname(host, arg, len) != 1)
497: result = 0;
498: else
499: debug("connection from %.100s matched 'Host "
500: "%.100s' at line %d", host, arg, line);
501: } else if (strcasecmp(attrib, "address") == 0) {
502: debug("address '%s' arg '%s'", address, arg);
503: if (!address) {
504: result = 0;
505: continue;
506: }
507: if (match_hostname(address, arg, len) != 1)
508: result = 0;
509: else
510: debug("connection from %.100s matched 'Address "
511: "%.100s' at line %d", address, arg, line);
512: } else {
513: error("Unsupported Match attribute %s", attrib);
514: return -1;
515: }
516: }
517: if (user != NULL)
518: debug3("match %sfound", result ? "" : "not ");
519: *condition = cp;
520: return result;
521: }
522:
1.158 dtucker 523: #define WHITESPACE " \t\r\n"
524:
1.94 markus 525: int
526: process_server_config_line(ServerOptions *options, char *line,
1.153 dtucker 527: const char *filename, int linenum, int *activep, const char *user,
528: const char *host, const char *address)
1.1 deraadt 529: {
1.74 stevesk 530: char *cp, **charptr, *arg, *p;
1.153 dtucker 531: int cmdline = 0, *intptr, value, n;
1.25 markus 532: ServerOpCodes opcode;
1.139 djm 533: u_short port;
1.153 dtucker 534: u_int i, flags = 0;
1.151 djm 535: size_t len;
1.25 markus 536:
1.94 markus 537: cp = line;
1.148 dtucker 538: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 539: return 0;
1.94 markus 540: /* Ignore leading whitespace */
541: if (*arg == '\0')
542: arg = strdelim(&cp);
543: if (!arg || !*arg || *arg == '#')
544: return 0;
545: intptr = NULL;
546: charptr = NULL;
1.153 dtucker 547: opcode = parse_token(arg, filename, linenum, &flags);
548:
549: if (activep == NULL) { /* We are processing a command line directive */
550: cmdline = 1;
551: activep = &cmdline;
552: }
553: if (*activep && opcode != sMatch)
554: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
555: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
556: if (user == NULL) {
557: fatal("%s line %d: Directive '%s' is not allowed "
558: "within a Match block", filename, linenum, arg);
559: } else { /* this is a directive we have already processed */
560: while (arg)
561: arg = strdelim(&cp);
562: return 0;
563: }
564: }
565:
1.94 markus 566: switch (opcode) {
567: case sBadOption:
568: return -1;
569: case sPort:
570: /* ignore ports from configfile if cmdline specifies ports */
571: if (options->ports_from_cmdline)
572: return 0;
573: if (options->listen_addrs != NULL)
574: fatal("%s line %d: ports must be specified before "
1.98 stevesk 575: "ListenAddress.", filename, linenum);
1.94 markus 576: if (options->num_ports >= MAX_PORTS)
577: fatal("%s line %d: too many ports.",
578: filename, linenum);
1.48 provos 579: arg = strdelim(&cp);
1.94 markus 580: if (!arg || *arg == '\0')
581: fatal("%s line %d: missing port number.",
582: filename, linenum);
583: options->ports[options->num_ports++] = a2port(arg);
584: if (options->ports[options->num_ports-1] == 0)
585: fatal("%s line %d: Badly formatted port number.",
586: filename, linenum);
587: break;
1.29 markus 588:
1.94 markus 589: case sServerKeyBits:
590: intptr = &options->server_key_bits;
1.25 markus 591: parse_int:
1.94 markus 592: arg = strdelim(&cp);
593: if (!arg || *arg == '\0')
594: fatal("%s line %d: missing integer value.",
595: filename, linenum);
596: value = atoi(arg);
1.153 dtucker 597: if (*activep && *intptr == -1)
1.94 markus 598: *intptr = value;
599: break;
1.25 markus 600:
1.94 markus 601: case sLoginGraceTime:
602: intptr = &options->login_grace_time;
1.81 stevesk 603: parse_time:
1.94 markus 604: arg = strdelim(&cp);
605: if (!arg || *arg == '\0')
606: fatal("%s line %d: missing time value.",
607: filename, linenum);
608: if ((value = convtime(arg)) == -1)
609: fatal("%s line %d: invalid time value.",
610: filename, linenum);
611: if (*intptr == -1)
612: *intptr = value;
613: break;
614:
615: case sKeyRegenerationTime:
616: intptr = &options->key_regeneration_time;
617: goto parse_time;
618:
619: case sListenAddress:
620: arg = strdelim(&cp);
1.139 djm 621: if (arg == NULL || *arg == '\0')
622: fatal("%s line %d: missing address",
1.94 markus 623: filename, linenum);
1.144 dtucker 624: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
625: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
626: && strchr(p+1, ':') != NULL) {
627: add_listen_addr(options, arg, 0);
628: break;
629: }
1.139 djm 630: p = hpdelim(&arg);
631: if (p == NULL)
632: fatal("%s line %d: bad address:port usage",
633: filename, linenum);
634: p = cleanhostname(p);
635: if (arg == NULL)
636: port = 0;
637: else if ((port = a2port(arg)) == 0)
638: fatal("%s line %d: bad port number", filename, linenum);
639:
640: add_listen_addr(options, p, port);
1.25 markus 641:
1.138 djm 642: break;
643:
644: case sAddressFamily:
645: arg = strdelim(&cp);
1.141 markus 646: if (!arg || *arg == '\0')
647: fatal("%s line %d: missing address family.",
648: filename, linenum);
1.138 djm 649: intptr = &options->address_family;
650: if (options->listen_addrs != NULL)
651: fatal("%s line %d: address family must be specified before "
652: "ListenAddress.", filename, linenum);
653: if (strcasecmp(arg, "inet") == 0)
654: value = AF_INET;
655: else if (strcasecmp(arg, "inet6") == 0)
656: value = AF_INET6;
657: else if (strcasecmp(arg, "any") == 0)
658: value = AF_UNSPEC;
659: else
660: fatal("%s line %d: unsupported address family \"%s\".",
661: filename, linenum, arg);
662: if (*intptr == -1)
663: *intptr = value;
1.94 markus 664: break;
665:
666: case sHostKeyFile:
667: intptr = &options->num_host_key_files;
668: if (*intptr >= MAX_HOSTKEYS)
669: fatal("%s line %d: too many host keys specified (max %d).",
670: filename, linenum, MAX_HOSTKEYS);
671: charptr = &options->host_key_files[*intptr];
672: parse_filename:
673: arg = strdelim(&cp);
674: if (!arg || *arg == '\0')
675: fatal("%s line %d: missing file name.",
676: filename, linenum);
1.153 dtucker 677: if (*activep && *charptr == NULL) {
1.94 markus 678: *charptr = tilde_expand_filename(arg, getuid());
679: /* increase optional counter */
680: if (intptr != NULL)
681: *intptr = *intptr + 1;
682: }
683: break;
1.76 stevesk 684:
1.94 markus 685: case sPidFile:
686: charptr = &options->pid_file;
687: goto parse_filename;
1.25 markus 688:
1.94 markus 689: case sPermitRootLogin:
690: intptr = &options->permit_root_login;
691: arg = strdelim(&cp);
692: if (!arg || *arg == '\0')
693: fatal("%s line %d: missing yes/"
694: "without-password/forced-commands-only/no "
695: "argument.", filename, linenum);
696: value = 0; /* silence compiler */
697: if (strcmp(arg, "without-password") == 0)
698: value = PERMIT_NO_PASSWD;
699: else if (strcmp(arg, "forced-commands-only") == 0)
700: value = PERMIT_FORCED_ONLY;
701: else if (strcmp(arg, "yes") == 0)
702: value = PERMIT_YES;
703: else if (strcmp(arg, "no") == 0)
704: value = PERMIT_NO;
705: else
706: fatal("%s line %d: Bad yes/"
707: "without-password/forced-commands-only/no "
708: "argument: %s", filename, linenum, arg);
709: if (*intptr == -1)
710: *intptr = value;
711: break;
1.36 markus 712:
1.94 markus 713: case sIgnoreRhosts:
714: intptr = &options->ignore_rhosts;
1.25 markus 715: parse_flag:
1.94 markus 716: arg = strdelim(&cp);
717: if (!arg || *arg == '\0')
718: fatal("%s line %d: missing yes/no argument.",
719: filename, linenum);
720: value = 0; /* silence compiler */
721: if (strcmp(arg, "yes") == 0)
722: value = 1;
723: else if (strcmp(arg, "no") == 0)
724: value = 0;
725: else
726: fatal("%s line %d: Bad yes/no argument: %s",
727: filename, linenum, arg);
1.153 dtucker 728: if (*activep && *intptr == -1)
1.94 markus 729: *intptr = value;
730: break;
731:
732: case sIgnoreUserKnownHosts:
733: intptr = &options->ignore_user_known_hosts;
734: goto parse_flag;
735:
736: case sRhostsRSAAuthentication:
737: intptr = &options->rhosts_rsa_authentication;
738: goto parse_flag;
739:
740: case sHostbasedAuthentication:
741: intptr = &options->hostbased_authentication;
742: goto parse_flag;
743:
744: case sHostbasedUsesNameFromPacketOnly:
745: intptr = &options->hostbased_uses_name_from_packet_only;
746: goto parse_flag;
747:
748: case sRSAAuthentication:
749: intptr = &options->rsa_authentication;
750: goto parse_flag;
751:
752: case sPubkeyAuthentication:
753: intptr = &options->pubkey_authentication;
754: goto parse_flag;
1.119 jakob 755:
1.94 markus 756: case sKerberosAuthentication:
757: intptr = &options->kerberos_authentication;
758: goto parse_flag;
759:
760: case sKerberosOrLocalPasswd:
761: intptr = &options->kerberos_or_local_passwd;
762: goto parse_flag;
763:
764: case sKerberosTicketCleanup:
765: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 766: goto parse_flag;
767:
768: case sKerberosGetAFSToken:
769: intptr = &options->kerberos_get_afs_token;
1.125 markus 770: goto parse_flag;
771:
772: case sGssAuthentication:
773: intptr = &options->gss_authentication;
774: goto parse_flag;
775:
776: case sGssCleanupCreds:
777: intptr = &options->gss_cleanup_creds;
1.94 markus 778: goto parse_flag;
779:
780: case sPasswordAuthentication:
781: intptr = &options->password_authentication;
782: goto parse_flag;
783:
784: case sKbdInteractiveAuthentication:
785: intptr = &options->kbd_interactive_authentication;
786: goto parse_flag;
787:
788: case sChallengeResponseAuthentication:
789: intptr = &options->challenge_response_authentication;
790: goto parse_flag;
791:
792: case sPrintMotd:
793: intptr = &options->print_motd;
794: goto parse_flag;
795:
796: case sPrintLastLog:
797: intptr = &options->print_lastlog;
798: goto parse_flag;
799:
800: case sX11Forwarding:
801: intptr = &options->x11_forwarding;
802: goto parse_flag;
803:
804: case sX11DisplayOffset:
805: intptr = &options->x11_display_offset;
806: goto parse_int;
1.99 stevesk 807:
808: case sX11UseLocalhost:
809: intptr = &options->x11_use_localhost;
810: goto parse_flag;
1.94 markus 811:
812: case sXAuthLocation:
813: charptr = &options->xauth_location;
814: goto parse_filename;
815:
816: case sStrictModes:
817: intptr = &options->strict_modes;
818: goto parse_flag;
819:
1.129 markus 820: case sTCPKeepAlive:
821: intptr = &options->tcp_keep_alive;
1.94 markus 822: goto parse_flag;
823:
824: case sEmptyPasswd:
825: intptr = &options->permit_empty_passwd;
1.113 markus 826: goto parse_flag;
827:
828: case sPermitUserEnvironment:
829: intptr = &options->permit_user_env;
1.94 markus 830: goto parse_flag;
831:
832: case sUseLogin:
833: intptr = &options->use_login;
1.111 markus 834: goto parse_flag;
835:
836: case sCompression:
837: intptr = &options->compression;
1.143 markus 838: arg = strdelim(&cp);
839: if (!arg || *arg == '\0')
840: fatal("%s line %d: missing yes/no/delayed "
841: "argument.", filename, linenum);
842: value = 0; /* silence compiler */
843: if (strcmp(arg, "delayed") == 0)
844: value = COMP_DELAYED;
845: else if (strcmp(arg, "yes") == 0)
846: value = COMP_ZLIB;
847: else if (strcmp(arg, "no") == 0)
848: value = COMP_NONE;
849: else
850: fatal("%s line %d: Bad yes/no/delayed "
851: "argument: %s", filename, linenum, arg);
852: if (*intptr == -1)
853: *intptr = value;
854: break;
1.94 markus 855:
856: case sGatewayPorts:
857: intptr = &options->gateway_ports;
1.139 djm 858: arg = strdelim(&cp);
859: if (!arg || *arg == '\0')
860: fatal("%s line %d: missing yes/no/clientspecified "
861: "argument.", filename, linenum);
862: value = 0; /* silence compiler */
863: if (strcmp(arg, "clientspecified") == 0)
864: value = 2;
865: else if (strcmp(arg, "yes") == 0)
866: value = 1;
867: else if (strcmp(arg, "no") == 0)
868: value = 0;
869: else
870: fatal("%s line %d: Bad yes/no/clientspecified "
871: "argument: %s", filename, linenum, arg);
872: if (*intptr == -1)
873: *intptr = value;
874: break;
1.25 markus 875:
1.122 markus 876: case sUseDNS:
877: intptr = &options->use_dns;
1.94 markus 878: goto parse_flag;
1.53 markus 879:
1.94 markus 880: case sLogFacility:
881: intptr = (int *) &options->log_facility;
882: arg = strdelim(&cp);
883: value = log_facility_number(arg);
1.101 markus 884: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 885: fatal("%.200s line %d: unsupported log facility '%s'",
886: filename, linenum, arg ? arg : "<NONE>");
887: if (*intptr == -1)
888: *intptr = (SyslogFacility) value;
889: break;
1.25 markus 890:
1.94 markus 891: case sLogLevel:
892: intptr = (int *) &options->log_level;
893: arg = strdelim(&cp);
894: value = log_level_number(arg);
1.101 markus 895: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 896: fatal("%.200s line %d: unsupported log level '%s'",
897: filename, linenum, arg ? arg : "<NONE>");
898: if (*intptr == -1)
899: *intptr = (LogLevel) value;
900: break;
901:
902: case sAllowTcpForwarding:
903: intptr = &options->allow_tcp_forwarding;
904: goto parse_flag;
1.102 provos 905:
906: case sUsePrivilegeSeparation:
907: intptr = &use_privsep;
908: goto parse_flag;
1.94 markus 909:
910: case sAllowUsers:
911: while ((arg = strdelim(&cp)) && *arg != '\0') {
912: if (options->num_allow_users >= MAX_ALLOW_USERS)
913: fatal("%s line %d: too many allow users.",
914: filename, linenum);
1.112 deraadt 915: options->allow_users[options->num_allow_users++] =
916: xstrdup(arg);
1.94 markus 917: }
918: break;
1.25 markus 919:
1.94 markus 920: case sDenyUsers:
921: while ((arg = strdelim(&cp)) && *arg != '\0') {
922: if (options->num_deny_users >= MAX_DENY_USERS)
1.163 ! stevesk 923: fatal("%s line %d: too many deny users.",
1.94 markus 924: filename, linenum);
1.112 deraadt 925: options->deny_users[options->num_deny_users++] =
926: xstrdup(arg);
1.94 markus 927: }
928: break;
1.25 markus 929:
1.94 markus 930: case sAllowGroups:
931: while ((arg = strdelim(&cp)) && *arg != '\0') {
932: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
933: fatal("%s line %d: too many allow groups.",
934: filename, linenum);
1.112 deraadt 935: options->allow_groups[options->num_allow_groups++] =
936: xstrdup(arg);
1.94 markus 937: }
938: break;
1.33 markus 939:
1.94 markus 940: case sDenyGroups:
941: while ((arg = strdelim(&cp)) && *arg != '\0') {
942: if (options->num_deny_groups >= MAX_DENY_GROUPS)
943: fatal("%s line %d: too many deny groups.",
944: filename, linenum);
945: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
946: }
947: break;
1.66 markus 948:
1.94 markus 949: case sCiphers:
950: arg = strdelim(&cp);
951: if (!arg || *arg == '\0')
952: fatal("%s line %d: Missing argument.", filename, linenum);
953: if (!ciphers_valid(arg))
954: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
955: filename, linenum, arg ? arg : "<NONE>");
956: if (options->ciphers == NULL)
957: options->ciphers = xstrdup(arg);
958: break;
1.33 markus 959:
1.94 markus 960: case sMacs:
961: arg = strdelim(&cp);
962: if (!arg || *arg == '\0')
963: fatal("%s line %d: Missing argument.", filename, linenum);
964: if (!mac_valid(arg))
965: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
966: filename, linenum, arg ? arg : "<NONE>");
967: if (options->macs == NULL)
968: options->macs = xstrdup(arg);
969: break;
1.43 jakob 970:
1.94 markus 971: case sProtocol:
972: intptr = &options->protocol;
973: arg = strdelim(&cp);
974: if (!arg || *arg == '\0')
975: fatal("%s line %d: Missing argument.", filename, linenum);
976: value = proto_spec(arg);
977: if (value == SSH_PROTO_UNKNOWN)
978: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 979: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 980: if (*intptr == SSH_PROTO_UNKNOWN)
981: *intptr = value;
982: break;
983:
984: case sSubsystem:
985: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
986: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 987: filename, linenum);
1.94 markus 988: }
989: arg = strdelim(&cp);
990: if (!arg || *arg == '\0')
991: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 992: filename, linenum);
1.153 dtucker 993: if (!*activep) {
994: arg = strdelim(&cp);
995: break;
996: }
1.94 markus 997: for (i = 0; i < options->num_subsystems; i++)
998: if (strcmp(arg, options->subsystem_name[i]) == 0)
999: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 1000: filename, linenum, arg);
1.94 markus 1001: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1002: arg = strdelim(&cp);
1003: if (!arg || *arg == '\0')
1004: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1005: filename, linenum);
1.94 markus 1006: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1007:
1008: /* Collect arguments (separate to executable) */
1009: p = xstrdup(arg);
1010: len = strlen(p) + 1;
1011: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1012: len += 1 + strlen(arg);
1013: p = xrealloc(p, 1, len);
1014: strlcat(p, " ", len);
1015: strlcat(p, arg, len);
1016: }
1017: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1018: options->num_subsystems++;
1019: break;
1.46 markus 1020:
1.94 markus 1021: case sMaxStartups:
1022: arg = strdelim(&cp);
1023: if (!arg || *arg == '\0')
1024: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1025: filename, linenum);
1.94 markus 1026: if ((n = sscanf(arg, "%d:%d:%d",
1027: &options->max_startups_begin,
1028: &options->max_startups_rate,
1029: &options->max_startups)) == 3) {
1030: if (options->max_startups_begin >
1031: options->max_startups ||
1032: options->max_startups_rate > 100 ||
1033: options->max_startups_rate < 1)
1.50 markus 1034: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1035: filename, linenum);
1.94 markus 1036: } else if (n != 1)
1037: fatal("%s line %d: Illegal MaxStartups spec.",
1038: filename, linenum);
1039: else
1040: options->max_startups = options->max_startups_begin;
1041: break;
1.133 dtucker 1042:
1043: case sMaxAuthTries:
1044: intptr = &options->max_authtries;
1045: goto parse_int;
1.94 markus 1046:
1047: case sBanner:
1048: charptr = &options->banner;
1049: goto parse_filename;
1050: /*
1051: * These options can contain %X options expanded at
1052: * connect time, so that you can specify paths like:
1053: *
1054: * AuthorizedKeysFile /etc/ssh_keys/%u
1055: */
1056: case sAuthorizedKeysFile:
1057: case sAuthorizedKeysFile2:
1.163 ! stevesk 1058: charptr = (opcode == sAuthorizedKeysFile) ?
1.94 markus 1059: &options->authorized_keys_file :
1060: &options->authorized_keys_file2;
1061: goto parse_filename;
1062:
1063: case sClientAliveInterval:
1064: intptr = &options->client_alive_interval;
1065: goto parse_time;
1066:
1067: case sClientAliveCountMax:
1068: intptr = &options->client_alive_count_max;
1069: goto parse_int;
1.131 djm 1070:
1071: case sAcceptEnv:
1072: while ((arg = strdelim(&cp)) && *arg != '\0') {
1073: if (strchr(arg, '=') != NULL)
1074: fatal("%s line %d: Invalid environment name.",
1075: filename, linenum);
1076: if (options->num_accept_env >= MAX_ACCEPT_ENV)
1077: fatal("%s line %d: too many allow env.",
1078: filename, linenum);
1.153 dtucker 1079: if (!*activep)
1080: break;
1.131 djm 1081: options->accept_env[options->num_accept_env++] =
1082: xstrdup(arg);
1083: }
1084: break;
1.145 reyk 1085:
1086: case sPermitTunnel:
1087: intptr = &options->permit_tun;
1.146 reyk 1088: arg = strdelim(&cp);
1089: if (!arg || *arg == '\0')
1090: fatal("%s line %d: Missing yes/point-to-point/"
1091: "ethernet/no argument.", filename, linenum);
1092: value = 0; /* silence compiler */
1093: if (strcasecmp(arg, "ethernet") == 0)
1094: value = SSH_TUNMODE_ETHERNET;
1095: else if (strcasecmp(arg, "point-to-point") == 0)
1096: value = SSH_TUNMODE_POINTOPOINT;
1097: else if (strcasecmp(arg, "yes") == 0)
1098: value = SSH_TUNMODE_YES;
1099: else if (strcasecmp(arg, "no") == 0)
1100: value = SSH_TUNMODE_NO;
1101: else
1102: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1103: "no argument: %s", filename, linenum, arg);
1104: if (*intptr == -1)
1105: *intptr = value;
1106: break;
1.94 markus 1107:
1.153 dtucker 1108: case sMatch:
1109: if (cmdline)
1110: fatal("Match directive not supported as a command-line "
1111: "option");
1112: value = match_cfg_line(&cp, linenum, user, host, address);
1113: if (value < 0)
1114: fatal("%s line %d: Bad Match condition", filename,
1115: linenum);
1116: *activep = value;
1.156 dtucker 1117: break;
1118:
1119: case sPermitOpen:
1120: arg = strdelim(&cp);
1121: if (!arg || *arg == '\0')
1122: fatal("%s line %d: missing PermitOpen specification",
1123: filename, linenum);
1124: if (strcmp(arg, "any") == 0) {
1.159 dtucker 1125: if (*activep) {
1.156 dtucker 1126: channel_clear_adm_permitted_opens();
1.159 dtucker 1127: options->num_permitted_opens = 0;
1128: }
1.156 dtucker 1129: break;
1130: }
1.159 dtucker 1131: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1132: p = hpdelim(&arg);
1133: if (p == NULL)
1134: fatal("%s line %d: missing host in PermitOpen",
1135: filename, linenum);
1136: p = cleanhostname(p);
1137: if (arg == NULL || (port = a2port(arg)) == 0)
1138: fatal("%s line %d: bad port number in "
1139: "PermitOpen", filename, linenum);
1140: if (*activep && options->num_permitted_opens == -1) {
1141: channel_clear_adm_permitted_opens();
1142: options->num_permitted_opens =
1143: channel_add_adm_permitted_opens(p, port);
1144: }
1145: }
1.153 dtucker 1146: break;
1147:
1.158 dtucker 1148: case sForceCommand:
1149: if (cp == NULL)
1150: fatal("%.200s line %d: Missing argument.", filename,
1151: linenum);
1152: len = strspn(cp, WHITESPACE);
1153: if (*activep && options->adm_forced_command == NULL)
1154: options->adm_forced_command = xstrdup(cp + len);
1155: return 0;
1156:
1.94 markus 1157: case sDeprecated:
1.117 itojun 1158: logit("%s line %d: Deprecated option %s",
1.121 jakob 1159: filename, linenum, arg);
1160: while (arg)
1161: arg = strdelim(&cp);
1162: break;
1163:
1164: case sUnsupported:
1165: logit("%s line %d: Unsupported option %s",
1.94 markus 1166: filename, linenum, arg);
1167: while (arg)
1168: arg = strdelim(&cp);
1169: break;
1170:
1171: default:
1172: fatal("%s line %d: Missing handler for opcode %s (%d)",
1173: filename, linenum, arg, opcode);
1174: }
1175: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
1176: fatal("%s line %d: garbage at end of line; \"%.200s\".",
1177: filename, linenum, arg);
1178: return 0;
1179: }
1180:
1181: /* Reads the server configuration file. */
1.25 markus 1182:
1.94 markus 1183: void
1.134 djm 1184: load_server_config(const char *filename, Buffer *conf)
1.94 markus 1185: {
1.134 djm 1186: char line[1024], *cp;
1.94 markus 1187: FILE *f;
1.81 stevesk 1188:
1.134 djm 1189: debug2("%s: filename %s", __func__, filename);
1190: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 1191: perror(filename);
1192: exit(1);
1193: }
1.134 djm 1194: buffer_clear(conf);
1195: while (fgets(line, sizeof(line), f)) {
1196: /*
1197: * Trim out comments and strip whitespace
1.135 deraadt 1198: * NB - preserve newlines, they are needed to reproduce
1.134 djm 1199: * line numbers later for error messages
1200: */
1201: if ((cp = strchr(line, '#')) != NULL)
1202: memcpy(cp, "\n", 2);
1203: cp = line + strspn(line, " \t\r");
1204:
1205: buffer_append(conf, cp, strlen(cp));
1206: }
1207: buffer_append(conf, "\0", 1);
1208: fclose(f);
1209: debug2("%s: done config len = %d", __func__, buffer_len(conf));
1210: }
1211:
1212: void
1.153 dtucker 1213: parse_server_match_config(ServerOptions *options, const char *user,
1214: const char *host, const char *address)
1215: {
1216: ServerOptions mo;
1217:
1218: initialize_server_options(&mo);
1219: parse_server_config(&mo, "reprocess config", &cfg, user, host, address);
1220: copy_set_server_options(options, &mo);
1221: }
1222:
1223: /* Copy any (supported) values that are set */
1224: void
1225: copy_set_server_options(ServerOptions *dst, ServerOptions *src)
1226: {
1227: if (src->allow_tcp_forwarding != -1)
1228: dst->allow_tcp_forwarding = src->allow_tcp_forwarding;
1229: if (src->gateway_ports != -1)
1230: dst->gateway_ports = src->gateway_ports;
1.158 dtucker 1231: if (src->adm_forced_command != NULL) {
1232: if (dst->adm_forced_command != NULL)
1233: xfree(dst->adm_forced_command);
1234: dst->adm_forced_command = src->adm_forced_command;
1235: }
1.157 dtucker 1236: if (src->x11_display_offset != -1)
1237: dst->x11_display_offset = src->x11_display_offset;
1238: if (src->x11_forwarding != -1)
1239: dst->x11_forwarding = src->x11_forwarding;
1240: if (src->x11_use_localhost != -1)
1241: dst->x11_use_localhost = src->x11_use_localhost;
1.153 dtucker 1242: }
1243:
1244: void
1245: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf,
1246: const char *user, const char *host, const char *address)
1.134 djm 1247: {
1.153 dtucker 1248: int active, linenum, bad_options = 0;
1.136 dtucker 1249: char *cp, *obuf, *cbuf;
1.134 djm 1250:
1251: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
1252:
1.136 dtucker 1253: obuf = cbuf = xstrdup(buffer_ptr(conf));
1.153 dtucker 1254: active = user ? 0 : 1;
1.137 dtucker 1255: linenum = 1;
1.140 deraadt 1256: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 1257: if (process_server_config_line(options, cp, filename,
1.153 dtucker 1258: linenum++, &active, user, host, address) != 0)
1.94 markus 1259: bad_options++;
1.1 deraadt 1260: }
1.136 dtucker 1261: xfree(obuf);
1.78 stevesk 1262: if (bad_options > 0)
1263: fatal("%s: terminating, %d bad configuration options",
1264: filename, bad_options);
1.1 deraadt 1265: }
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