Annotation of src/usr.bin/ssh/servconf.c, Revision 1.151
1.151 ! djm 1: /* $OpenBSD: servconf.c,v 1.150 2006/03/25 13:17:02 djm 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"
14:
15: #include "ssh.h"
1.62 markus 16: #include "log.h"
1.1 deraadt 17: #include "servconf.h"
18: #include "xmalloc.h"
1.33 markus 19: #include "compat.h"
1.60 markus 20: #include "pathnames.h"
1.62 markus 21: #include "misc.h"
22: #include "cipher.h"
1.66 markus 23: #include "kex.h"
24: #include "mac.h"
1.1 deraadt 25:
1.84 itojun 26: static void add_listen_addr(ServerOptions *, char *, u_short);
27: static void add_one_listen_addr(ServerOptions *, char *, u_short);
1.29 markus 28:
1.102 provos 29: /* Use of privilege separation or not */
30: extern int use_privsep;
1.62 markus 31:
1.1 deraadt 32: /* Initializes the server options to their default values. */
33:
1.34 markus 34: void
1.25 markus 35: initialize_server_options(ServerOptions *options)
1.1 deraadt 36: {
1.25 markus 37: memset(options, 0, sizeof(*options));
1.29 markus 38: options->num_ports = 0;
39: options->ports_from_cmdline = 0;
40: options->listen_addrs = NULL;
1.138 djm 41: options->address_family = -1;
1.54 markus 42: options->num_host_key_files = 0;
1.36 markus 43: options->pid_file = NULL;
1.25 markus 44: options->server_key_bits = -1;
45: options->login_grace_time = -1;
46: options->key_regeneration_time = -1;
1.67 markus 47: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 48: options->ignore_rhosts = -1;
49: options->ignore_user_known_hosts = -1;
50: options->print_motd = -1;
1.72 stevesk 51: options->print_lastlog = -1;
1.25 markus 52: options->x11_forwarding = -1;
53: options->x11_display_offset = -1;
1.99 stevesk 54: options->x11_use_localhost = -1;
1.42 markus 55: options->xauth_location = NULL;
1.25 markus 56: options->strict_modes = -1;
1.129 markus 57: options->tcp_keep_alive = -1;
1.101 markus 58: options->log_facility = SYSLOG_FACILITY_NOT_SET;
59: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 60: options->rhosts_rsa_authentication = -1;
1.75 markus 61: options->hostbased_authentication = -1;
62: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 63: options->rsa_authentication = -1;
1.54 markus 64: options->pubkey_authentication = -1;
1.25 markus 65: options->kerberos_authentication = -1;
66: options->kerberos_or_local_passwd = -1;
67: options->kerberos_ticket_cleanup = -1;
1.130 jakob 68: options->kerberos_get_afs_token = -1;
1.125 markus 69: options->gss_authentication=-1;
70: options->gss_cleanup_creds = -1;
1.25 markus 71: options->password_authentication = -1;
1.52 markus 72: options->kbd_interactive_authentication = -1;
1.80 markus 73: options->challenge_response_authentication = -1;
1.25 markus 74: options->permit_empty_passwd = -1;
1.113 markus 75: options->permit_user_env = -1;
1.25 markus 76: options->use_login = -1;
1.111 markus 77: options->compression = -1;
1.53 markus 78: options->allow_tcp_forwarding = -1;
1.25 markus 79: options->num_allow_users = 0;
80: options->num_deny_users = 0;
81: options->num_allow_groups = 0;
82: options->num_deny_groups = 0;
1.33 markus 83: options->ciphers = NULL;
1.66 markus 84: options->macs = NULL;
1.33 markus 85: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 86: options->gateway_ports = -1;
1.43 jakob 87: options->num_subsystems = 0;
1.50 markus 88: options->max_startups_begin = -1;
89: options->max_startups_rate = -1;
1.46 markus 90: options->max_startups = -1;
1.133 dtucker 91: options->max_authtries = -1;
1.57 markus 92: options->banner = NULL;
1.122 markus 93: options->use_dns = -1;
1.77 beck 94: options->client_alive_interval = -1;
95: options->client_alive_count_max = -1;
1.82 markus 96: options->authorized_keys_file = NULL;
97: options->authorized_keys_file2 = NULL;
1.131 djm 98: options->num_accept_env = 0;
1.145 reyk 99: options->permit_tun = -1;
1.102 provos 100:
101: /* Needs to be accessable in many places */
102: use_privsep = -1;
1.1 deraadt 103: }
104:
1.34 markus 105: void
1.25 markus 106: fill_default_server_options(ServerOptions *options)
1.1 deraadt 107: {
1.54 markus 108: if (options->protocol == SSH_PROTO_UNKNOWN)
109: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
110: if (options->num_host_key_files == 0) {
111: /* fill default hostkeys for protocols */
112: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 113: options->host_key_files[options->num_host_key_files++] =
114: _PATH_HOST_KEY_FILE;
115: if (options->protocol & SSH_PROTO_2) {
116: options->host_key_files[options->num_host_key_files++] =
117: _PATH_HOST_RSA_KEY_FILE;
118: options->host_key_files[options->num_host_key_files++] =
119: _PATH_HOST_DSA_KEY_FILE;
120: }
1.54 markus 121: }
1.29 markus 122: if (options->num_ports == 0)
123: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
124: if (options->listen_addrs == NULL)
1.76 stevesk 125: add_listen_addr(options, NULL, 0);
1.36 markus 126: if (options->pid_file == NULL)
1.60 markus 127: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 128: if (options->server_key_bits == -1)
129: options->server_key_bits = 768;
130: if (options->login_grace_time == -1)
1.115 stevesk 131: options->login_grace_time = 120;
1.25 markus 132: if (options->key_regeneration_time == -1)
133: options->key_regeneration_time = 3600;
1.67 markus 134: if (options->permit_root_login == PERMIT_NOT_SET)
135: options->permit_root_login = PERMIT_YES;
1.25 markus 136: if (options->ignore_rhosts == -1)
1.30 markus 137: options->ignore_rhosts = 1;
1.25 markus 138: if (options->ignore_user_known_hosts == -1)
139: options->ignore_user_known_hosts = 0;
140: if (options->print_motd == -1)
141: options->print_motd = 1;
1.72 stevesk 142: if (options->print_lastlog == -1)
143: options->print_lastlog = 1;
1.25 markus 144: if (options->x11_forwarding == -1)
1.30 markus 145: options->x11_forwarding = 0;
1.25 markus 146: if (options->x11_display_offset == -1)
1.30 markus 147: options->x11_display_offset = 10;
1.99 stevesk 148: if (options->x11_use_localhost == -1)
149: options->x11_use_localhost = 1;
1.42 markus 150: if (options->xauth_location == NULL)
1.83 markus 151: options->xauth_location = _PATH_XAUTH;
1.25 markus 152: if (options->strict_modes == -1)
153: options->strict_modes = 1;
1.129 markus 154: if (options->tcp_keep_alive == -1)
155: options->tcp_keep_alive = 1;
1.101 markus 156: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 157: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 158: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 159: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 160: if (options->rhosts_rsa_authentication == -1)
1.30 markus 161: options->rhosts_rsa_authentication = 0;
1.75 markus 162: if (options->hostbased_authentication == -1)
163: options->hostbased_authentication = 0;
164: if (options->hostbased_uses_name_from_packet_only == -1)
165: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 166: if (options->rsa_authentication == -1)
167: options->rsa_authentication = 1;
1.54 markus 168: if (options->pubkey_authentication == -1)
169: options->pubkey_authentication = 1;
1.25 markus 170: if (options->kerberos_authentication == -1)
1.107 markus 171: options->kerberos_authentication = 0;
1.25 markus 172: if (options->kerberos_or_local_passwd == -1)
173: options->kerberos_or_local_passwd = 1;
174: if (options->kerberos_ticket_cleanup == -1)
175: options->kerberos_ticket_cleanup = 1;
1.130 jakob 176: if (options->kerberos_get_afs_token == -1)
177: options->kerberos_get_afs_token = 0;
1.125 markus 178: if (options->gss_authentication == -1)
179: options->gss_authentication = 0;
180: if (options->gss_cleanup_creds == -1)
181: options->gss_cleanup_creds = 1;
1.25 markus 182: if (options->password_authentication == -1)
183: options->password_authentication = 1;
1.52 markus 184: if (options->kbd_interactive_authentication == -1)
185: options->kbd_interactive_authentication = 0;
1.80 markus 186: if (options->challenge_response_authentication == -1)
187: options->challenge_response_authentication = 1;
1.25 markus 188: if (options->permit_empty_passwd == -1)
1.30 markus 189: options->permit_empty_passwd = 0;
1.113 markus 190: if (options->permit_user_env == -1)
191: options->permit_user_env = 0;
1.25 markus 192: if (options->use_login == -1)
193: options->use_login = 0;
1.111 markus 194: if (options->compression == -1)
1.143 markus 195: options->compression = COMP_DELAYED;
1.53 markus 196: if (options->allow_tcp_forwarding == -1)
197: options->allow_tcp_forwarding = 1;
1.38 markus 198: if (options->gateway_ports == -1)
199: options->gateway_ports = 0;
1.46 markus 200: if (options->max_startups == -1)
201: options->max_startups = 10;
1.50 markus 202: if (options->max_startups_rate == -1)
203: options->max_startups_rate = 100; /* 100% */
204: if (options->max_startups_begin == -1)
205: options->max_startups_begin = options->max_startups;
1.133 dtucker 206: if (options->max_authtries == -1)
207: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.122 markus 208: if (options->use_dns == -1)
209: options->use_dns = 1;
1.77 beck 210: if (options->client_alive_interval == -1)
1.95 deraadt 211: options->client_alive_interval = 0;
1.77 beck 212: if (options->client_alive_count_max == -1)
213: options->client_alive_count_max = 3;
1.90 markus 214: if (options->authorized_keys_file2 == NULL) {
215: /* authorized_keys_file2 falls back to authorized_keys_file */
216: if (options->authorized_keys_file != NULL)
217: options->authorized_keys_file2 = options->authorized_keys_file;
218: else
219: options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2;
220: }
221: if (options->authorized_keys_file == NULL)
222: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.145 reyk 223: if (options->permit_tun == -1)
1.146 reyk 224: options->permit_tun = SSH_TUNMODE_NO;
1.102 provos 225:
1.110 markus 226: /* Turn privilege separation on by default */
1.102 provos 227: if (use_privsep == -1)
1.110 markus 228: use_privsep = 1;
1.1 deraadt 229: }
230:
231: /* Keyword tokens. */
1.25 markus 232: typedef enum {
233: sBadOption, /* == unknown option */
234: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
235: sPermitRootLogin, sLogFacility, sLogLevel,
1.124 markus 236: sRhostsRSAAuthentication, sRSAAuthentication,
1.25 markus 237: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.130 jakob 238: sKerberosGetAFSToken,
1.123 markus 239: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.138 djm 240: sPasswordAuthentication, sKbdInteractiveAuthentication,
241: sListenAddress, sAddressFamily,
1.72 stevesk 242: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 243: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.129 markus 244: sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.113 markus 245: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.53 markus 246: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 247: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.133 dtucker 248: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem,
249: sMaxStartups, sMaxAuthTries,
1.122 markus 250: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 251: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 252: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
1.145 reyk 253: sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel,
1.105 stevesk 254: sUsePrivilegeSeparation,
1.121 jakob 255: sDeprecated, sUnsupported
1.1 deraadt 256: } ServerOpCodes;
257:
258: /* Textual representation of the tokens. */
1.25 markus 259: static struct {
260: const char *name;
261: ServerOpCodes opcode;
262: } keywords[] = {
263: { "port", sPort },
264: { "hostkey", sHostKeyFile },
1.54 markus 265: { "hostdsakey", sHostKeyFile }, /* alias */
1.65 stevesk 266: { "pidfile", sPidFile },
1.25 markus 267: { "serverkeybits", sServerKeyBits },
268: { "logingracetime", sLoginGraceTime },
269: { "keyregenerationinterval", sKeyRegenerationTime },
270: { "permitrootlogin", sPermitRootLogin },
271: { "syslogfacility", sLogFacility },
272: { "loglevel", sLogLevel },
1.124 markus 273: { "rhostsauthentication", sDeprecated },
1.25 markus 274: { "rhostsrsaauthentication", sRhostsRSAAuthentication },
1.75 markus 275: { "hostbasedauthentication", sHostbasedAuthentication },
276: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly },
1.25 markus 277: { "rsaauthentication", sRSAAuthentication },
1.54 markus 278: { "pubkeyauthentication", sPubkeyAuthentication },
279: { "dsaauthentication", sPubkeyAuthentication }, /* alias */
1.123 markus 280: #ifdef KRB5
1.25 markus 281: { "kerberosauthentication", sKerberosAuthentication },
282: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
283: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.130 jakob 284: { "kerberosgetafstoken", sKerberosGetAFSToken },
1.121 jakob 285: #else
286: { "kerberosauthentication", sUnsupported },
287: { "kerberosorlocalpasswd", sUnsupported },
288: { "kerberosticketcleanup", sUnsupported },
1.130 jakob 289: { "kerberosgetafstoken", sUnsupported },
1.126 markus 290: #endif
1.121 jakob 291: { "kerberostgtpassing", sUnsupported },
292: { "afstokenpassing", sUnsupported },
1.125 markus 293: #ifdef GSSAPI
294: { "gssapiauthentication", sGssAuthentication },
1.128 markus 295: { "gssapicleanupcredentials", sGssCleanupCreds },
1.125 markus 296: #else
297: { "gssapiauthentication", sUnsupported },
1.128 markus 298: { "gssapicleanupcredentials", sUnsupported },
1.125 markus 299: #endif
1.25 markus 300: { "passwordauthentication", sPasswordAuthentication },
1.52 markus 301: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
1.63 markus 302: { "challengeresponseauthentication", sChallengeResponseAuthentication },
303: { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
1.89 jakob 304: { "checkmail", sDeprecated },
1.25 markus 305: { "listenaddress", sListenAddress },
1.138 djm 306: { "addressfamily", sAddressFamily },
1.25 markus 307: { "printmotd", sPrintMotd },
1.72 stevesk 308: { "printlastlog", sPrintLastLog },
1.25 markus 309: { "ignorerhosts", sIgnoreRhosts },
310: { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
311: { "x11forwarding", sX11Forwarding },
312: { "x11displayoffset", sX11DisplayOffset },
1.99 stevesk 313: { "x11uselocalhost", sX11UseLocalhost },
1.42 markus 314: { "xauthlocation", sXAuthLocation },
1.25 markus 315: { "strictmodes", sStrictModes },
316: { "permitemptypasswords", sEmptyPasswd },
1.113 markus 317: { "permituserenvironment", sPermitUserEnvironment },
1.25 markus 318: { "uselogin", sUseLogin },
1.111 markus 319: { "compression", sCompression },
1.129 markus 320: { "tcpkeepalive", sTCPKeepAlive },
321: { "keepalive", sTCPKeepAlive }, /* obsolete alias */
1.53 markus 322: { "allowtcpforwarding", sAllowTcpForwarding },
1.25 markus 323: { "allowusers", sAllowUsers },
324: { "denyusers", sDenyUsers },
325: { "allowgroups", sAllowGroups },
326: { "denygroups", sDenyGroups },
1.33 markus 327: { "ciphers", sCiphers },
1.66 markus 328: { "macs", sMacs },
1.33 markus 329: { "protocol", sProtocol },
1.38 markus 330: { "gatewayports", sGatewayPorts },
1.43 jakob 331: { "subsystem", sSubsystem },
1.46 markus 332: { "maxstartups", sMaxStartups },
1.133 dtucker 333: { "maxauthtries", sMaxAuthTries },
1.57 markus 334: { "banner", sBanner },
1.122 markus 335: { "usedns", sUseDNS },
336: { "verifyreversemapping", sDeprecated },
337: { "reversemappingcheck", sDeprecated },
1.77 beck 338: { "clientaliveinterval", sClientAliveInterval },
339: { "clientalivecountmax", sClientAliveCountMax },
1.82 markus 340: { "authorizedkeysfile", sAuthorizedKeysFile },
341: { "authorizedkeysfile2", sAuthorizedKeysFile2 },
1.102 provos 342: { "useprivilegeseparation", sUsePrivilegeSeparation},
1.131 djm 343: { "acceptenv", sAcceptEnv },
1.145 reyk 344: { "permittunnel", sPermitTunnel },
1.92 stevesk 345: { NULL, sBadOption }
1.1 deraadt 346: };
347:
1.27 markus 348: /*
1.73 stevesk 349: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 350: */
1.1 deraadt 351:
1.34 markus 352: static ServerOpCodes
1.25 markus 353: parse_token(const char *cp, const char *filename,
354: int linenum)
1.1 deraadt 355: {
1.55 markus 356: u_int i;
1.1 deraadt 357:
1.25 markus 358: for (i = 0; keywords[i].name; i++)
1.28 markus 359: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 360: return keywords[i].opcode;
361:
1.78 stevesk 362: error("%s: line %d: Bad configuration option: %s",
363: filename, linenum, cp);
1.25 markus 364: return sBadOption;
1.1 deraadt 365: }
366:
1.84 itojun 367: static void
1.76 stevesk 368: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 369: {
1.142 djm 370: u_int i;
1.74 stevesk 371:
372: if (options->num_ports == 0)
373: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.138 djm 374: if (options->address_family == -1)
375: options->address_family = AF_UNSPEC;
1.76 stevesk 376: if (port == 0)
1.74 stevesk 377: for (i = 0; i < options->num_ports; i++)
378: add_one_listen_addr(options, addr, options->ports[i]);
379: else
1.76 stevesk 380: add_one_listen_addr(options, addr, port);
1.74 stevesk 381: }
382:
1.84 itojun 383: static void
1.74 stevesk 384: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 385: {
386: struct addrinfo hints, *ai, *aitop;
387: char strport[NI_MAXSERV];
388: int gaierr;
389:
1.74 stevesk 390: memset(&hints, 0, sizeof(hints));
1.138 djm 391: hints.ai_family = options->address_family;
1.74 stevesk 392: hints.ai_socktype = SOCK_STREAM;
393: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.112 deraadt 394: snprintf(strport, sizeof strport, "%u", port);
1.74 stevesk 395: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
396: fatal("bad addr or host: %s (%s)",
397: addr ? addr : "<NULL>",
398: gai_strerror(gaierr));
399: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
400: ;
401: ai->ai_next = options->listen_addrs;
402: options->listen_addrs = aitop;
1.29 markus 403: }
404:
1.94 markus 405: int
406: process_server_config_line(ServerOptions *options, char *line,
407: const char *filename, int linenum)
1.1 deraadt 408: {
1.74 stevesk 409: char *cp, **charptr, *arg, *p;
1.142 djm 410: int *intptr, value, n;
1.25 markus 411: ServerOpCodes opcode;
1.139 djm 412: u_short port;
1.142 djm 413: u_int i;
1.151 ! djm 414: size_t len;
1.25 markus 415:
1.94 markus 416: cp = line;
1.148 dtucker 417: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 418: return 0;
1.94 markus 419: /* Ignore leading whitespace */
420: if (*arg == '\0')
421: arg = strdelim(&cp);
422: if (!arg || !*arg || *arg == '#')
423: return 0;
424: intptr = NULL;
425: charptr = NULL;
426: opcode = parse_token(arg, filename, linenum);
427: switch (opcode) {
428: case sBadOption:
429: return -1;
430: case sPort:
431: /* ignore ports from configfile if cmdline specifies ports */
432: if (options->ports_from_cmdline)
433: return 0;
434: if (options->listen_addrs != NULL)
435: fatal("%s line %d: ports must be specified before "
1.98 stevesk 436: "ListenAddress.", filename, linenum);
1.94 markus 437: if (options->num_ports >= MAX_PORTS)
438: fatal("%s line %d: too many ports.",
439: filename, linenum);
1.48 provos 440: arg = strdelim(&cp);
1.94 markus 441: if (!arg || *arg == '\0')
442: fatal("%s line %d: missing port number.",
443: filename, linenum);
444: options->ports[options->num_ports++] = a2port(arg);
445: if (options->ports[options->num_ports-1] == 0)
446: fatal("%s line %d: Badly formatted port number.",
447: filename, linenum);
448: break;
1.29 markus 449:
1.94 markus 450: case sServerKeyBits:
451: intptr = &options->server_key_bits;
1.25 markus 452: parse_int:
1.94 markus 453: arg = strdelim(&cp);
454: if (!arg || *arg == '\0')
455: fatal("%s line %d: missing integer value.",
456: filename, linenum);
457: value = atoi(arg);
458: if (*intptr == -1)
459: *intptr = value;
460: break;
1.25 markus 461:
1.94 markus 462: case sLoginGraceTime:
463: intptr = &options->login_grace_time;
1.81 stevesk 464: parse_time:
1.94 markus 465: arg = strdelim(&cp);
466: if (!arg || *arg == '\0')
467: fatal("%s line %d: missing time value.",
468: filename, linenum);
469: if ((value = convtime(arg)) == -1)
470: fatal("%s line %d: invalid time value.",
471: filename, linenum);
472: if (*intptr == -1)
473: *intptr = value;
474: break;
475:
476: case sKeyRegenerationTime:
477: intptr = &options->key_regeneration_time;
478: goto parse_time;
479:
480: case sListenAddress:
481: arg = strdelim(&cp);
1.139 djm 482: if (arg == NULL || *arg == '\0')
483: fatal("%s line %d: missing address",
1.94 markus 484: filename, linenum);
1.144 dtucker 485: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
486: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
487: && strchr(p+1, ':') != NULL) {
488: add_listen_addr(options, arg, 0);
489: break;
490: }
1.139 djm 491: p = hpdelim(&arg);
492: if (p == NULL)
493: fatal("%s line %d: bad address:port usage",
494: filename, linenum);
495: p = cleanhostname(p);
496: if (arg == NULL)
497: port = 0;
498: else if ((port = a2port(arg)) == 0)
499: fatal("%s line %d: bad port number", filename, linenum);
500:
501: add_listen_addr(options, p, port);
1.25 markus 502:
1.138 djm 503: break;
504:
505: case sAddressFamily:
506: arg = strdelim(&cp);
1.141 markus 507: if (!arg || *arg == '\0')
508: fatal("%s line %d: missing address family.",
509: filename, linenum);
1.138 djm 510: intptr = &options->address_family;
511: if (options->listen_addrs != NULL)
512: fatal("%s line %d: address family must be specified before "
513: "ListenAddress.", filename, linenum);
514: if (strcasecmp(arg, "inet") == 0)
515: value = AF_INET;
516: else if (strcasecmp(arg, "inet6") == 0)
517: value = AF_INET6;
518: else if (strcasecmp(arg, "any") == 0)
519: value = AF_UNSPEC;
520: else
521: fatal("%s line %d: unsupported address family \"%s\".",
522: filename, linenum, arg);
523: if (*intptr == -1)
524: *intptr = value;
1.94 markus 525: break;
526:
527: case sHostKeyFile:
528: intptr = &options->num_host_key_files;
529: if (*intptr >= MAX_HOSTKEYS)
530: fatal("%s line %d: too many host keys specified (max %d).",
531: filename, linenum, MAX_HOSTKEYS);
532: charptr = &options->host_key_files[*intptr];
533: parse_filename:
534: arg = strdelim(&cp);
535: if (!arg || *arg == '\0')
536: fatal("%s line %d: missing file name.",
537: filename, linenum);
538: if (*charptr == NULL) {
539: *charptr = tilde_expand_filename(arg, getuid());
540: /* increase optional counter */
541: if (intptr != NULL)
542: *intptr = *intptr + 1;
543: }
544: break;
1.76 stevesk 545:
1.94 markus 546: case sPidFile:
547: charptr = &options->pid_file;
548: goto parse_filename;
1.25 markus 549:
1.94 markus 550: case sPermitRootLogin:
551: intptr = &options->permit_root_login;
552: arg = strdelim(&cp);
553: if (!arg || *arg == '\0')
554: fatal("%s line %d: missing yes/"
555: "without-password/forced-commands-only/no "
556: "argument.", filename, linenum);
557: value = 0; /* silence compiler */
558: if (strcmp(arg, "without-password") == 0)
559: value = PERMIT_NO_PASSWD;
560: else if (strcmp(arg, "forced-commands-only") == 0)
561: value = PERMIT_FORCED_ONLY;
562: else if (strcmp(arg, "yes") == 0)
563: value = PERMIT_YES;
564: else if (strcmp(arg, "no") == 0)
565: value = PERMIT_NO;
566: else
567: fatal("%s line %d: Bad yes/"
568: "without-password/forced-commands-only/no "
569: "argument: %s", filename, linenum, arg);
570: if (*intptr == -1)
571: *intptr = value;
572: break;
1.36 markus 573:
1.94 markus 574: case sIgnoreRhosts:
575: intptr = &options->ignore_rhosts;
1.25 markus 576: parse_flag:
1.94 markus 577: arg = strdelim(&cp);
578: if (!arg || *arg == '\0')
579: fatal("%s line %d: missing yes/no argument.",
580: filename, linenum);
581: value = 0; /* silence compiler */
582: if (strcmp(arg, "yes") == 0)
583: value = 1;
584: else if (strcmp(arg, "no") == 0)
585: value = 0;
586: else
587: fatal("%s line %d: Bad yes/no argument: %s",
588: filename, linenum, arg);
589: if (*intptr == -1)
590: *intptr = value;
591: break;
592:
593: case sIgnoreUserKnownHosts:
594: intptr = &options->ignore_user_known_hosts;
595: goto parse_flag;
596:
597: case sRhostsRSAAuthentication:
598: intptr = &options->rhosts_rsa_authentication;
599: goto parse_flag;
600:
601: case sHostbasedAuthentication:
602: intptr = &options->hostbased_authentication;
603: goto parse_flag;
604:
605: case sHostbasedUsesNameFromPacketOnly:
606: intptr = &options->hostbased_uses_name_from_packet_only;
607: goto parse_flag;
608:
609: case sRSAAuthentication:
610: intptr = &options->rsa_authentication;
611: goto parse_flag;
612:
613: case sPubkeyAuthentication:
614: intptr = &options->pubkey_authentication;
615: goto parse_flag;
1.119 jakob 616:
1.94 markus 617: case sKerberosAuthentication:
618: intptr = &options->kerberos_authentication;
619: goto parse_flag;
620:
621: case sKerberosOrLocalPasswd:
622: intptr = &options->kerberos_or_local_passwd;
623: goto parse_flag;
624:
625: case sKerberosTicketCleanup:
626: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 627: goto parse_flag;
628:
629: case sKerberosGetAFSToken:
630: intptr = &options->kerberos_get_afs_token;
1.125 markus 631: goto parse_flag;
632:
633: case sGssAuthentication:
634: intptr = &options->gss_authentication;
635: goto parse_flag;
636:
637: case sGssCleanupCreds:
638: intptr = &options->gss_cleanup_creds;
1.94 markus 639: goto parse_flag;
640:
641: case sPasswordAuthentication:
642: intptr = &options->password_authentication;
643: goto parse_flag;
644:
645: case sKbdInteractiveAuthentication:
646: intptr = &options->kbd_interactive_authentication;
647: goto parse_flag;
648:
649: case sChallengeResponseAuthentication:
650: intptr = &options->challenge_response_authentication;
651: goto parse_flag;
652:
653: case sPrintMotd:
654: intptr = &options->print_motd;
655: goto parse_flag;
656:
657: case sPrintLastLog:
658: intptr = &options->print_lastlog;
659: goto parse_flag;
660:
661: case sX11Forwarding:
662: intptr = &options->x11_forwarding;
663: goto parse_flag;
664:
665: case sX11DisplayOffset:
666: intptr = &options->x11_display_offset;
667: goto parse_int;
1.99 stevesk 668:
669: case sX11UseLocalhost:
670: intptr = &options->x11_use_localhost;
671: goto parse_flag;
1.94 markus 672:
673: case sXAuthLocation:
674: charptr = &options->xauth_location;
675: goto parse_filename;
676:
677: case sStrictModes:
678: intptr = &options->strict_modes;
679: goto parse_flag;
680:
1.129 markus 681: case sTCPKeepAlive:
682: intptr = &options->tcp_keep_alive;
1.94 markus 683: goto parse_flag;
684:
685: case sEmptyPasswd:
686: intptr = &options->permit_empty_passwd;
1.113 markus 687: goto parse_flag;
688:
689: case sPermitUserEnvironment:
690: intptr = &options->permit_user_env;
1.94 markus 691: goto parse_flag;
692:
693: case sUseLogin:
694: intptr = &options->use_login;
1.111 markus 695: goto parse_flag;
696:
697: case sCompression:
698: intptr = &options->compression;
1.143 markus 699: arg = strdelim(&cp);
700: if (!arg || *arg == '\0')
701: fatal("%s line %d: missing yes/no/delayed "
702: "argument.", filename, linenum);
703: value = 0; /* silence compiler */
704: if (strcmp(arg, "delayed") == 0)
705: value = COMP_DELAYED;
706: else if (strcmp(arg, "yes") == 0)
707: value = COMP_ZLIB;
708: else if (strcmp(arg, "no") == 0)
709: value = COMP_NONE;
710: else
711: fatal("%s line %d: Bad yes/no/delayed "
712: "argument: %s", filename, linenum, arg);
713: if (*intptr == -1)
714: *intptr = value;
715: break;
1.94 markus 716:
717: case sGatewayPorts:
718: intptr = &options->gateway_ports;
1.139 djm 719: arg = strdelim(&cp);
720: if (!arg || *arg == '\0')
721: fatal("%s line %d: missing yes/no/clientspecified "
722: "argument.", filename, linenum);
723: value = 0; /* silence compiler */
724: if (strcmp(arg, "clientspecified") == 0)
725: value = 2;
726: else if (strcmp(arg, "yes") == 0)
727: value = 1;
728: else if (strcmp(arg, "no") == 0)
729: value = 0;
730: else
731: fatal("%s line %d: Bad yes/no/clientspecified "
732: "argument: %s", filename, linenum, arg);
733: if (*intptr == -1)
734: *intptr = value;
735: break;
1.25 markus 736:
1.122 markus 737: case sUseDNS:
738: intptr = &options->use_dns;
1.94 markus 739: goto parse_flag;
1.53 markus 740:
1.94 markus 741: case sLogFacility:
742: intptr = (int *) &options->log_facility;
743: arg = strdelim(&cp);
744: value = log_facility_number(arg);
1.101 markus 745: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 746: fatal("%.200s line %d: unsupported log facility '%s'",
747: filename, linenum, arg ? arg : "<NONE>");
748: if (*intptr == -1)
749: *intptr = (SyslogFacility) value;
750: break;
1.25 markus 751:
1.94 markus 752: case sLogLevel:
753: intptr = (int *) &options->log_level;
754: arg = strdelim(&cp);
755: value = log_level_number(arg);
1.101 markus 756: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 757: fatal("%.200s line %d: unsupported log level '%s'",
758: filename, linenum, arg ? arg : "<NONE>");
759: if (*intptr == -1)
760: *intptr = (LogLevel) value;
761: break;
762:
763: case sAllowTcpForwarding:
764: intptr = &options->allow_tcp_forwarding;
765: goto parse_flag;
1.102 provos 766:
767: case sUsePrivilegeSeparation:
768: intptr = &use_privsep;
769: goto parse_flag;
1.94 markus 770:
771: case sAllowUsers:
772: while ((arg = strdelim(&cp)) && *arg != '\0') {
773: if (options->num_allow_users >= MAX_ALLOW_USERS)
774: fatal("%s line %d: too many allow users.",
775: filename, linenum);
1.112 deraadt 776: options->allow_users[options->num_allow_users++] =
777: xstrdup(arg);
1.94 markus 778: }
779: break;
1.25 markus 780:
1.94 markus 781: case sDenyUsers:
782: while ((arg = strdelim(&cp)) && *arg != '\0') {
783: if (options->num_deny_users >= MAX_DENY_USERS)
784: fatal( "%s line %d: too many deny users.",
785: filename, linenum);
1.112 deraadt 786: options->deny_users[options->num_deny_users++] =
787: xstrdup(arg);
1.94 markus 788: }
789: break;
1.25 markus 790:
1.94 markus 791: case sAllowGroups:
792: while ((arg = strdelim(&cp)) && *arg != '\0') {
793: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
794: fatal("%s line %d: too many allow groups.",
795: filename, linenum);
1.112 deraadt 796: options->allow_groups[options->num_allow_groups++] =
797: xstrdup(arg);
1.94 markus 798: }
799: break;
1.33 markus 800:
1.94 markus 801: case sDenyGroups:
802: while ((arg = strdelim(&cp)) && *arg != '\0') {
803: if (options->num_deny_groups >= MAX_DENY_GROUPS)
804: fatal("%s line %d: too many deny groups.",
805: filename, linenum);
806: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
807: }
808: break;
1.66 markus 809:
1.94 markus 810: case sCiphers:
811: arg = strdelim(&cp);
812: if (!arg || *arg == '\0')
813: fatal("%s line %d: Missing argument.", filename, linenum);
814: if (!ciphers_valid(arg))
815: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
816: filename, linenum, arg ? arg : "<NONE>");
817: if (options->ciphers == NULL)
818: options->ciphers = xstrdup(arg);
819: break;
1.33 markus 820:
1.94 markus 821: case sMacs:
822: arg = strdelim(&cp);
823: if (!arg || *arg == '\0')
824: fatal("%s line %d: Missing argument.", filename, linenum);
825: if (!mac_valid(arg))
826: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
827: filename, linenum, arg ? arg : "<NONE>");
828: if (options->macs == NULL)
829: options->macs = xstrdup(arg);
830: break;
1.43 jakob 831:
1.94 markus 832: case sProtocol:
833: intptr = &options->protocol;
834: arg = strdelim(&cp);
835: if (!arg || *arg == '\0')
836: fatal("%s line %d: Missing argument.", filename, linenum);
837: value = proto_spec(arg);
838: if (value == SSH_PROTO_UNKNOWN)
839: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 840: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 841: if (*intptr == SSH_PROTO_UNKNOWN)
842: *intptr = value;
843: break;
844:
845: case sSubsystem:
846: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
847: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 848: filename, linenum);
1.94 markus 849: }
850: arg = strdelim(&cp);
851: if (!arg || *arg == '\0')
852: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 853: filename, linenum);
1.94 markus 854: for (i = 0; i < options->num_subsystems; i++)
855: if (strcmp(arg, options->subsystem_name[i]) == 0)
856: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 857: filename, linenum, arg);
1.94 markus 858: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
859: arg = strdelim(&cp);
860: if (!arg || *arg == '\0')
861: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 862: filename, linenum);
1.94 markus 863: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 ! djm 864:
! 865: /* Collect arguments (separate to executable) */
! 866: p = xstrdup(arg);
! 867: len = strlen(p) + 1;
! 868: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
! 869: len += 1 + strlen(arg);
! 870: p = xrealloc(p, 1, len);
! 871: strlcat(p, " ", len);
! 872: strlcat(p, arg, len);
! 873: }
! 874: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 875: options->num_subsystems++;
876: break;
1.46 markus 877:
1.94 markus 878: case sMaxStartups:
879: arg = strdelim(&cp);
880: if (!arg || *arg == '\0')
881: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 882: filename, linenum);
1.94 markus 883: if ((n = sscanf(arg, "%d:%d:%d",
884: &options->max_startups_begin,
885: &options->max_startups_rate,
886: &options->max_startups)) == 3) {
887: if (options->max_startups_begin >
888: options->max_startups ||
889: options->max_startups_rate > 100 ||
890: options->max_startups_rate < 1)
1.50 markus 891: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 892: filename, linenum);
1.94 markus 893: } else if (n != 1)
894: fatal("%s line %d: Illegal MaxStartups spec.",
895: filename, linenum);
896: else
897: options->max_startups = options->max_startups_begin;
898: break;
1.133 dtucker 899:
900: case sMaxAuthTries:
901: intptr = &options->max_authtries;
902: goto parse_int;
1.94 markus 903:
904: case sBanner:
905: charptr = &options->banner;
906: goto parse_filename;
907: /*
908: * These options can contain %X options expanded at
909: * connect time, so that you can specify paths like:
910: *
911: * AuthorizedKeysFile /etc/ssh_keys/%u
912: */
913: case sAuthorizedKeysFile:
914: case sAuthorizedKeysFile2:
915: charptr = (opcode == sAuthorizedKeysFile ) ?
916: &options->authorized_keys_file :
917: &options->authorized_keys_file2;
918: goto parse_filename;
919:
920: case sClientAliveInterval:
921: intptr = &options->client_alive_interval;
922: goto parse_time;
923:
924: case sClientAliveCountMax:
925: intptr = &options->client_alive_count_max;
926: goto parse_int;
1.131 djm 927:
928: case sAcceptEnv:
929: while ((arg = strdelim(&cp)) && *arg != '\0') {
930: if (strchr(arg, '=') != NULL)
931: fatal("%s line %d: Invalid environment name.",
932: filename, linenum);
933: if (options->num_accept_env >= MAX_ACCEPT_ENV)
934: fatal("%s line %d: too many allow env.",
935: filename, linenum);
936: options->accept_env[options->num_accept_env++] =
937: xstrdup(arg);
938: }
939: break;
1.145 reyk 940:
941: case sPermitTunnel:
942: intptr = &options->permit_tun;
1.146 reyk 943: arg = strdelim(&cp);
944: if (!arg || *arg == '\0')
945: fatal("%s line %d: Missing yes/point-to-point/"
946: "ethernet/no argument.", filename, linenum);
947: value = 0; /* silence compiler */
948: if (strcasecmp(arg, "ethernet") == 0)
949: value = SSH_TUNMODE_ETHERNET;
950: else if (strcasecmp(arg, "point-to-point") == 0)
951: value = SSH_TUNMODE_POINTOPOINT;
952: else if (strcasecmp(arg, "yes") == 0)
953: value = SSH_TUNMODE_YES;
954: else if (strcasecmp(arg, "no") == 0)
955: value = SSH_TUNMODE_NO;
956: else
957: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
958: "no argument: %s", filename, linenum, arg);
959: if (*intptr == -1)
960: *intptr = value;
961: break;
1.94 markus 962:
963: case sDeprecated:
1.117 itojun 964: logit("%s line %d: Deprecated option %s",
1.121 jakob 965: filename, linenum, arg);
966: while (arg)
967: arg = strdelim(&cp);
968: break;
969:
970: case sUnsupported:
971: logit("%s line %d: Unsupported option %s",
1.94 markus 972: filename, linenum, arg);
973: while (arg)
974: arg = strdelim(&cp);
975: break;
976:
977: default:
978: fatal("%s line %d: Missing handler for opcode %s (%d)",
979: filename, linenum, arg, opcode);
980: }
981: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
982: fatal("%s line %d: garbage at end of line; \"%.200s\".",
983: filename, linenum, arg);
984: return 0;
985: }
986:
987: /* Reads the server configuration file. */
1.25 markus 988:
1.94 markus 989: void
1.134 djm 990: load_server_config(const char *filename, Buffer *conf)
1.94 markus 991: {
1.134 djm 992: char line[1024], *cp;
1.94 markus 993: FILE *f;
1.81 stevesk 994:
1.134 djm 995: debug2("%s: filename %s", __func__, filename);
996: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 997: perror(filename);
998: exit(1);
999: }
1.134 djm 1000: buffer_clear(conf);
1001: while (fgets(line, sizeof(line), f)) {
1002: /*
1003: * Trim out comments and strip whitespace
1.135 deraadt 1004: * NB - preserve newlines, they are needed to reproduce
1.134 djm 1005: * line numbers later for error messages
1006: */
1007: if ((cp = strchr(line, '#')) != NULL)
1008: memcpy(cp, "\n", 2);
1009: cp = line + strspn(line, " \t\r");
1010:
1011: buffer_append(conf, cp, strlen(cp));
1012: }
1013: buffer_append(conf, "\0", 1);
1014: fclose(f);
1015: debug2("%s: done config len = %d", __func__, buffer_len(conf));
1016: }
1017:
1018: void
1019: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf)
1020: {
1021: int linenum, bad_options = 0;
1.136 dtucker 1022: char *cp, *obuf, *cbuf;
1.134 djm 1023:
1024: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
1025:
1.136 dtucker 1026: obuf = cbuf = xstrdup(buffer_ptr(conf));
1.137 dtucker 1027: linenum = 1;
1.140 deraadt 1028: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 1029: if (process_server_config_line(options, cp, filename,
1030: linenum++) != 0)
1.94 markus 1031: bad_options++;
1.1 deraadt 1032: }
1.136 dtucker 1033: xfree(obuf);
1.78 stevesk 1034: if (bad_options > 0)
1035: fatal("%s: terminating, %d bad configuration options",
1036: filename, bad_options);
1.1 deraadt 1037: }
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