Annotation of src/usr.bin/ssh/servconf.c, Revision 1.131
1.1 deraadt 1: /*
1.26 deraadt 2: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
3: * All rights reserved
1.34 markus 4: *
1.51 deraadt 5: * As far as I am concerned, the code I have written for this software
6: * can be used freely for any purpose. Any derived versions of this
7: * software must be clearly marked as such, and if the derived work is
8: * incompatible with the protocol description in the RFC file, it must be
9: * called by a name other than "ssh" or "Secure Shell".
1.26 deraadt 10: */
1.1 deraadt 11:
12: #include "includes.h"
1.131 ! djm 13: RCSID("$OpenBSD: servconf.c,v 1.130 2003/12/23 16:12:10 jakob Exp $");
1.1 deraadt 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 "tildexpand.h"
22: #include "misc.h"
23: #include "cipher.h"
1.66 markus 24: #include "kex.h"
25: #include "mac.h"
1.1 deraadt 26:
1.84 itojun 27: static void add_listen_addr(ServerOptions *, char *, u_short);
28: static void add_one_listen_addr(ServerOptions *, char *, u_short);
1.29 markus 29:
1.62 markus 30: /* AF_UNSPEC or AF_INET or AF_INET6 */
31: extern int IPv4or6;
1.102 provos 32: /* Use of privilege separation or not */
33: extern int use_privsep;
1.62 markus 34:
1.1 deraadt 35: /* Initializes the server options to their default values. */
36:
1.34 markus 37: void
1.25 markus 38: initialize_server_options(ServerOptions *options)
1.1 deraadt 39: {
1.25 markus 40: memset(options, 0, sizeof(*options));
1.29 markus 41: options->num_ports = 0;
42: options->ports_from_cmdline = 0;
43: options->listen_addrs = NULL;
1.54 markus 44: options->num_host_key_files = 0;
1.36 markus 45: options->pid_file = NULL;
1.25 markus 46: options->server_key_bits = -1;
47: options->login_grace_time = -1;
48: options->key_regeneration_time = -1;
1.67 markus 49: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 50: options->ignore_rhosts = -1;
51: options->ignore_user_known_hosts = -1;
52: options->print_motd = -1;
1.72 stevesk 53: options->print_lastlog = -1;
1.25 markus 54: options->x11_forwarding = -1;
55: options->x11_display_offset = -1;
1.99 stevesk 56: options->x11_use_localhost = -1;
1.42 markus 57: options->xauth_location = NULL;
1.25 markus 58: options->strict_modes = -1;
1.129 markus 59: options->tcp_keep_alive = -1;
1.101 markus 60: options->log_facility = SYSLOG_FACILITY_NOT_SET;
61: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 62: options->rhosts_rsa_authentication = -1;
1.75 markus 63: options->hostbased_authentication = -1;
64: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 65: options->rsa_authentication = -1;
1.54 markus 66: options->pubkey_authentication = -1;
1.25 markus 67: options->kerberos_authentication = -1;
68: options->kerberos_or_local_passwd = -1;
69: options->kerberos_ticket_cleanup = -1;
1.130 jakob 70: options->kerberos_get_afs_token = -1;
1.125 markus 71: options->gss_authentication=-1;
72: options->gss_cleanup_creds = -1;
1.25 markus 73: options->password_authentication = -1;
1.52 markus 74: options->kbd_interactive_authentication = -1;
1.80 markus 75: options->challenge_response_authentication = -1;
1.25 markus 76: options->permit_empty_passwd = -1;
1.113 markus 77: options->permit_user_env = -1;
1.25 markus 78: options->use_login = -1;
1.111 markus 79: options->compression = -1;
1.53 markus 80: options->allow_tcp_forwarding = -1;
1.25 markus 81: options->num_allow_users = 0;
82: options->num_deny_users = 0;
83: options->num_allow_groups = 0;
84: options->num_deny_groups = 0;
1.33 markus 85: options->ciphers = NULL;
1.66 markus 86: options->macs = NULL;
1.33 markus 87: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 88: options->gateway_ports = -1;
1.43 jakob 89: options->num_subsystems = 0;
1.50 markus 90: options->max_startups_begin = -1;
91: options->max_startups_rate = -1;
1.46 markus 92: options->max_startups = -1;
1.57 markus 93: options->banner = NULL;
1.122 markus 94: options->use_dns = -1;
1.77 beck 95: options->client_alive_interval = -1;
96: options->client_alive_count_max = -1;
1.82 markus 97: options->authorized_keys_file = NULL;
98: options->authorized_keys_file2 = NULL;
1.131 ! djm 99: options->num_accept_env = 0;
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)
195: options->compression = 1;
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;
1.122 markus 206: if (options->use_dns == -1)
207: options->use_dns = 1;
1.77 beck 208: if (options->client_alive_interval == -1)
1.95 deraadt 209: options->client_alive_interval = 0;
1.77 beck 210: if (options->client_alive_count_max == -1)
211: options->client_alive_count_max = 3;
1.90 markus 212: if (options->authorized_keys_file2 == NULL) {
213: /* authorized_keys_file2 falls back to authorized_keys_file */
214: if (options->authorized_keys_file != NULL)
215: options->authorized_keys_file2 = options->authorized_keys_file;
216: else
217: options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2;
218: }
219: if (options->authorized_keys_file == NULL)
220: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.102 provos 221:
1.110 markus 222: /* Turn privilege separation on by default */
1.102 provos 223: if (use_privsep == -1)
1.110 markus 224: use_privsep = 1;
1.1 deraadt 225: }
226:
227: /* Keyword tokens. */
1.25 markus 228: typedef enum {
229: sBadOption, /* == unknown option */
230: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
231: sPermitRootLogin, sLogFacility, sLogLevel,
1.124 markus 232: sRhostsRSAAuthentication, sRSAAuthentication,
1.25 markus 233: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.130 jakob 234: sKerberosGetAFSToken,
1.123 markus 235: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.52 markus 236: sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
1.72 stevesk 237: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 238: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.129 markus 239: sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.113 markus 240: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.53 markus 241: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 242: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.54 markus 243: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
1.122 markus 244: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 245: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 246: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
1.131 ! djm 247: sGssAuthentication, sGssCleanupCreds, sAcceptEnv,
1.105 stevesk 248: sUsePrivilegeSeparation,
1.121 jakob 249: sDeprecated, sUnsupported
1.1 deraadt 250: } ServerOpCodes;
251:
252: /* Textual representation of the tokens. */
1.25 markus 253: static struct {
254: const char *name;
255: ServerOpCodes opcode;
256: } keywords[] = {
257: { "port", sPort },
258: { "hostkey", sHostKeyFile },
1.54 markus 259: { "hostdsakey", sHostKeyFile }, /* alias */
1.65 stevesk 260: { "pidfile", sPidFile },
1.25 markus 261: { "serverkeybits", sServerKeyBits },
262: { "logingracetime", sLoginGraceTime },
263: { "keyregenerationinterval", sKeyRegenerationTime },
264: { "permitrootlogin", sPermitRootLogin },
265: { "syslogfacility", sLogFacility },
266: { "loglevel", sLogLevel },
1.124 markus 267: { "rhostsauthentication", sDeprecated },
1.25 markus 268: { "rhostsrsaauthentication", sRhostsRSAAuthentication },
1.75 markus 269: { "hostbasedauthentication", sHostbasedAuthentication },
270: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly },
1.25 markus 271: { "rsaauthentication", sRSAAuthentication },
1.54 markus 272: { "pubkeyauthentication", sPubkeyAuthentication },
273: { "dsaauthentication", sPubkeyAuthentication }, /* alias */
1.123 markus 274: #ifdef KRB5
1.25 markus 275: { "kerberosauthentication", sKerberosAuthentication },
276: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
277: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.130 jakob 278: { "kerberosgetafstoken", sKerberosGetAFSToken },
1.121 jakob 279: #else
280: { "kerberosauthentication", sUnsupported },
281: { "kerberosorlocalpasswd", sUnsupported },
282: { "kerberosticketcleanup", sUnsupported },
1.130 jakob 283: { "kerberosgetafstoken", sUnsupported },
1.126 markus 284: #endif
1.121 jakob 285: { "kerberostgtpassing", sUnsupported },
286: { "afstokenpassing", sUnsupported },
1.125 markus 287: #ifdef GSSAPI
288: { "gssapiauthentication", sGssAuthentication },
1.128 markus 289: { "gssapicleanupcredentials", sGssCleanupCreds },
1.125 markus 290: #else
291: { "gssapiauthentication", sUnsupported },
1.128 markus 292: { "gssapicleanupcredentials", sUnsupported },
1.125 markus 293: #endif
1.25 markus 294: { "passwordauthentication", sPasswordAuthentication },
1.52 markus 295: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
1.63 markus 296: { "challengeresponseauthentication", sChallengeResponseAuthentication },
297: { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
1.89 jakob 298: { "checkmail", sDeprecated },
1.25 markus 299: { "listenaddress", sListenAddress },
300: { "printmotd", sPrintMotd },
1.72 stevesk 301: { "printlastlog", sPrintLastLog },
1.25 markus 302: { "ignorerhosts", sIgnoreRhosts },
303: { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
304: { "x11forwarding", sX11Forwarding },
305: { "x11displayoffset", sX11DisplayOffset },
1.99 stevesk 306: { "x11uselocalhost", sX11UseLocalhost },
1.42 markus 307: { "xauthlocation", sXAuthLocation },
1.25 markus 308: { "strictmodes", sStrictModes },
309: { "permitemptypasswords", sEmptyPasswd },
1.113 markus 310: { "permituserenvironment", sPermitUserEnvironment },
1.25 markus 311: { "uselogin", sUseLogin },
1.111 markus 312: { "compression", sCompression },
1.129 markus 313: { "tcpkeepalive", sTCPKeepAlive },
314: { "keepalive", sTCPKeepAlive }, /* obsolete alias */
1.53 markus 315: { "allowtcpforwarding", sAllowTcpForwarding },
1.25 markus 316: { "allowusers", sAllowUsers },
317: { "denyusers", sDenyUsers },
318: { "allowgroups", sAllowGroups },
319: { "denygroups", sDenyGroups },
1.33 markus 320: { "ciphers", sCiphers },
1.66 markus 321: { "macs", sMacs },
1.33 markus 322: { "protocol", sProtocol },
1.38 markus 323: { "gatewayports", sGatewayPorts },
1.43 jakob 324: { "subsystem", sSubsystem },
1.46 markus 325: { "maxstartups", sMaxStartups },
1.57 markus 326: { "banner", sBanner },
1.122 markus 327: { "usedns", sUseDNS },
328: { "verifyreversemapping", sDeprecated },
329: { "reversemappingcheck", sDeprecated },
1.77 beck 330: { "clientaliveinterval", sClientAliveInterval },
331: { "clientalivecountmax", sClientAliveCountMax },
1.82 markus 332: { "authorizedkeysfile", sAuthorizedKeysFile },
333: { "authorizedkeysfile2", sAuthorizedKeysFile2 },
1.102 provos 334: { "useprivilegeseparation", sUsePrivilegeSeparation},
1.131 ! djm 335: { "acceptenv", sAcceptEnv },
1.92 stevesk 336: { NULL, sBadOption }
1.1 deraadt 337: };
338:
1.27 markus 339: /*
1.73 stevesk 340: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 341: */
1.1 deraadt 342:
1.34 markus 343: static ServerOpCodes
1.25 markus 344: parse_token(const char *cp, const char *filename,
345: int linenum)
1.1 deraadt 346: {
1.55 markus 347: u_int i;
1.1 deraadt 348:
1.25 markus 349: for (i = 0; keywords[i].name; i++)
1.28 markus 350: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 351: return keywords[i].opcode;
352:
1.78 stevesk 353: error("%s: line %d: Bad configuration option: %s",
354: filename, linenum, cp);
1.25 markus 355: return sBadOption;
1.1 deraadt 356: }
357:
1.84 itojun 358: static void
1.76 stevesk 359: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 360: {
361: int i;
362:
363: if (options->num_ports == 0)
364: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.76 stevesk 365: if (port == 0)
1.74 stevesk 366: for (i = 0; i < options->num_ports; i++)
367: add_one_listen_addr(options, addr, options->ports[i]);
368: else
1.76 stevesk 369: add_one_listen_addr(options, addr, port);
1.74 stevesk 370: }
371:
1.84 itojun 372: static void
1.74 stevesk 373: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 374: {
375: struct addrinfo hints, *ai, *aitop;
376: char strport[NI_MAXSERV];
377: int gaierr;
378:
1.74 stevesk 379: memset(&hints, 0, sizeof(hints));
380: hints.ai_family = IPv4or6;
381: hints.ai_socktype = SOCK_STREAM;
382: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.112 deraadt 383: snprintf(strport, sizeof strport, "%u", port);
1.74 stevesk 384: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
385: fatal("bad addr or host: %s (%s)",
386: addr ? addr : "<NULL>",
387: gai_strerror(gaierr));
388: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
389: ;
390: ai->ai_next = options->listen_addrs;
391: options->listen_addrs = aitop;
1.29 markus 392: }
393:
1.94 markus 394: int
395: process_server_config_line(ServerOptions *options, char *line,
396: const char *filename, int linenum)
1.1 deraadt 397: {
1.74 stevesk 398: char *cp, **charptr, *arg, *p;
1.112 deraadt 399: int *intptr, value, i, n;
1.25 markus 400: ServerOpCodes opcode;
401:
1.94 markus 402: cp = line;
403: arg = strdelim(&cp);
404: /* Ignore leading whitespace */
405: if (*arg == '\0')
406: arg = strdelim(&cp);
407: if (!arg || !*arg || *arg == '#')
408: return 0;
409: intptr = NULL;
410: charptr = NULL;
411: opcode = parse_token(arg, filename, linenum);
412: switch (opcode) {
413: case sBadOption:
414: return -1;
415: case sPort:
416: /* ignore ports from configfile if cmdline specifies ports */
417: if (options->ports_from_cmdline)
418: return 0;
419: if (options->listen_addrs != NULL)
420: fatal("%s line %d: ports must be specified before "
1.98 stevesk 421: "ListenAddress.", filename, linenum);
1.94 markus 422: if (options->num_ports >= MAX_PORTS)
423: fatal("%s line %d: too many ports.",
424: filename, linenum);
1.48 provos 425: arg = strdelim(&cp);
1.94 markus 426: if (!arg || *arg == '\0')
427: fatal("%s line %d: missing port number.",
428: filename, linenum);
429: options->ports[options->num_ports++] = a2port(arg);
430: if (options->ports[options->num_ports-1] == 0)
431: fatal("%s line %d: Badly formatted port number.",
432: filename, linenum);
433: break;
1.29 markus 434:
1.94 markus 435: case sServerKeyBits:
436: intptr = &options->server_key_bits;
1.25 markus 437: parse_int:
1.94 markus 438: arg = strdelim(&cp);
439: if (!arg || *arg == '\0')
440: fatal("%s line %d: missing integer value.",
441: filename, linenum);
442: value = atoi(arg);
443: if (*intptr == -1)
444: *intptr = value;
445: break;
1.25 markus 446:
1.94 markus 447: case sLoginGraceTime:
448: intptr = &options->login_grace_time;
1.81 stevesk 449: parse_time:
1.94 markus 450: arg = strdelim(&cp);
451: if (!arg || *arg == '\0')
452: fatal("%s line %d: missing time value.",
453: filename, linenum);
454: if ((value = convtime(arg)) == -1)
455: fatal("%s line %d: invalid time value.",
456: filename, linenum);
457: if (*intptr == -1)
458: *intptr = value;
459: break;
460:
461: case sKeyRegenerationTime:
462: intptr = &options->key_regeneration_time;
463: goto parse_time;
464:
465: case sListenAddress:
466: arg = strdelim(&cp);
467: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
468: fatal("%s line %d: missing inet addr.",
469: filename, linenum);
470: if (*arg == '[') {
471: if ((p = strchr(arg, ']')) == NULL)
472: fatal("%s line %d: bad ipv6 inet addr usage.",
473: filename, linenum);
474: arg++;
475: memmove(p, p+1, strlen(p+1)+1);
476: } else if (((p = strchr(arg, ':')) == NULL) ||
477: (strchr(p+1, ':') != NULL)) {
478: add_listen_addr(options, arg, 0);
1.81 stevesk 479: break;
1.94 markus 480: }
481: if (*p == ':') {
482: u_short port;
1.25 markus 483:
1.94 markus 484: p++;
485: if (*p == '\0')
486: fatal("%s line %d: bad inet addr:port usage.",
487: filename, linenum);
488: else {
489: *(p-1) = '\0';
490: if ((port = a2port(p)) == 0)
491: fatal("%s line %d: bad port number.",
1.74 stevesk 492: filename, linenum);
1.94 markus 493: add_listen_addr(options, arg, port);
1.74 stevesk 494: }
1.94 markus 495: } else if (*p == '\0')
496: add_listen_addr(options, arg, 0);
497: else
498: fatal("%s line %d: bad inet addr usage.",
499: filename, linenum);
500: break;
501:
502: case sHostKeyFile:
503: intptr = &options->num_host_key_files;
504: if (*intptr >= MAX_HOSTKEYS)
505: fatal("%s line %d: too many host keys specified (max %d).",
506: filename, linenum, MAX_HOSTKEYS);
507: charptr = &options->host_key_files[*intptr];
508: parse_filename:
509: arg = strdelim(&cp);
510: if (!arg || *arg == '\0')
511: fatal("%s line %d: missing file name.",
512: filename, linenum);
513: if (*charptr == NULL) {
514: *charptr = tilde_expand_filename(arg, getuid());
515: /* increase optional counter */
516: if (intptr != NULL)
517: *intptr = *intptr + 1;
518: }
519: break;
1.76 stevesk 520:
1.94 markus 521: case sPidFile:
522: charptr = &options->pid_file;
523: goto parse_filename;
1.25 markus 524:
1.94 markus 525: case sPermitRootLogin:
526: intptr = &options->permit_root_login;
527: arg = strdelim(&cp);
528: if (!arg || *arg == '\0')
529: fatal("%s line %d: missing yes/"
530: "without-password/forced-commands-only/no "
531: "argument.", filename, linenum);
532: value = 0; /* silence compiler */
533: if (strcmp(arg, "without-password") == 0)
534: value = PERMIT_NO_PASSWD;
535: else if (strcmp(arg, "forced-commands-only") == 0)
536: value = PERMIT_FORCED_ONLY;
537: else if (strcmp(arg, "yes") == 0)
538: value = PERMIT_YES;
539: else if (strcmp(arg, "no") == 0)
540: value = PERMIT_NO;
541: else
542: fatal("%s line %d: Bad yes/"
543: "without-password/forced-commands-only/no "
544: "argument: %s", filename, linenum, arg);
545: if (*intptr == -1)
546: *intptr = value;
547: break;
1.36 markus 548:
1.94 markus 549: case sIgnoreRhosts:
550: intptr = &options->ignore_rhosts;
1.25 markus 551: parse_flag:
1.94 markus 552: arg = strdelim(&cp);
553: if (!arg || *arg == '\0')
554: fatal("%s line %d: missing yes/no argument.",
555: filename, linenum);
556: value = 0; /* silence compiler */
557: if (strcmp(arg, "yes") == 0)
558: value = 1;
559: else if (strcmp(arg, "no") == 0)
560: value = 0;
561: else
562: fatal("%s line %d: Bad yes/no argument: %s",
563: filename, linenum, arg);
564: if (*intptr == -1)
565: *intptr = value;
566: break;
567:
568: case sIgnoreUserKnownHosts:
569: intptr = &options->ignore_user_known_hosts;
570: goto parse_flag;
571:
572: case sRhostsRSAAuthentication:
573: intptr = &options->rhosts_rsa_authentication;
574: goto parse_flag;
575:
576: case sHostbasedAuthentication:
577: intptr = &options->hostbased_authentication;
578: goto parse_flag;
579:
580: case sHostbasedUsesNameFromPacketOnly:
581: intptr = &options->hostbased_uses_name_from_packet_only;
582: goto parse_flag;
583:
584: case sRSAAuthentication:
585: intptr = &options->rsa_authentication;
586: goto parse_flag;
587:
588: case sPubkeyAuthentication:
589: intptr = &options->pubkey_authentication;
590: goto parse_flag;
1.119 jakob 591:
1.94 markus 592: case sKerberosAuthentication:
593: intptr = &options->kerberos_authentication;
594: goto parse_flag;
595:
596: case sKerberosOrLocalPasswd:
597: intptr = &options->kerberos_or_local_passwd;
598: goto parse_flag;
599:
600: case sKerberosTicketCleanup:
601: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 602: goto parse_flag;
603:
604: case sKerberosGetAFSToken:
605: intptr = &options->kerberos_get_afs_token;
1.125 markus 606: goto parse_flag;
607:
608: case sGssAuthentication:
609: intptr = &options->gss_authentication;
610: goto parse_flag;
611:
612: case sGssCleanupCreds:
613: intptr = &options->gss_cleanup_creds;
1.94 markus 614: goto parse_flag;
615:
616: case sPasswordAuthentication:
617: intptr = &options->password_authentication;
618: goto parse_flag;
619:
620: case sKbdInteractiveAuthentication:
621: intptr = &options->kbd_interactive_authentication;
622: goto parse_flag;
623:
624: case sChallengeResponseAuthentication:
625: intptr = &options->challenge_response_authentication;
626: goto parse_flag;
627:
628: case sPrintMotd:
629: intptr = &options->print_motd;
630: goto parse_flag;
631:
632: case sPrintLastLog:
633: intptr = &options->print_lastlog;
634: goto parse_flag;
635:
636: case sX11Forwarding:
637: intptr = &options->x11_forwarding;
638: goto parse_flag;
639:
640: case sX11DisplayOffset:
641: intptr = &options->x11_display_offset;
642: goto parse_int;
1.99 stevesk 643:
644: case sX11UseLocalhost:
645: intptr = &options->x11_use_localhost;
646: goto parse_flag;
1.94 markus 647:
648: case sXAuthLocation:
649: charptr = &options->xauth_location;
650: goto parse_filename;
651:
652: case sStrictModes:
653: intptr = &options->strict_modes;
654: goto parse_flag;
655:
1.129 markus 656: case sTCPKeepAlive:
657: intptr = &options->tcp_keep_alive;
1.94 markus 658: goto parse_flag;
659:
660: case sEmptyPasswd:
661: intptr = &options->permit_empty_passwd;
1.113 markus 662: goto parse_flag;
663:
664: case sPermitUserEnvironment:
665: intptr = &options->permit_user_env;
1.94 markus 666: goto parse_flag;
667:
668: case sUseLogin:
669: intptr = &options->use_login;
1.111 markus 670: goto parse_flag;
671:
672: case sCompression:
673: intptr = &options->compression;
1.94 markus 674: goto parse_flag;
675:
676: case sGatewayPorts:
677: intptr = &options->gateway_ports;
678: goto parse_flag;
1.25 markus 679:
1.122 markus 680: case sUseDNS:
681: intptr = &options->use_dns;
1.94 markus 682: goto parse_flag;
1.53 markus 683:
1.94 markus 684: case sLogFacility:
685: intptr = (int *) &options->log_facility;
686: arg = strdelim(&cp);
687: value = log_facility_number(arg);
1.101 markus 688: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 689: fatal("%.200s line %d: unsupported log facility '%s'",
690: filename, linenum, arg ? arg : "<NONE>");
691: if (*intptr == -1)
692: *intptr = (SyslogFacility) value;
693: break;
1.25 markus 694:
1.94 markus 695: case sLogLevel:
696: intptr = (int *) &options->log_level;
697: arg = strdelim(&cp);
698: value = log_level_number(arg);
1.101 markus 699: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 700: fatal("%.200s line %d: unsupported log level '%s'",
701: filename, linenum, arg ? arg : "<NONE>");
702: if (*intptr == -1)
703: *intptr = (LogLevel) value;
704: break;
705:
706: case sAllowTcpForwarding:
707: intptr = &options->allow_tcp_forwarding;
708: goto parse_flag;
1.102 provos 709:
710: case sUsePrivilegeSeparation:
711: intptr = &use_privsep;
712: goto parse_flag;
1.94 markus 713:
714: case sAllowUsers:
715: while ((arg = strdelim(&cp)) && *arg != '\0') {
716: if (options->num_allow_users >= MAX_ALLOW_USERS)
717: fatal("%s line %d: too many allow users.",
718: filename, linenum);
1.112 deraadt 719: options->allow_users[options->num_allow_users++] =
720: xstrdup(arg);
1.94 markus 721: }
722: break;
1.25 markus 723:
1.94 markus 724: case sDenyUsers:
725: while ((arg = strdelim(&cp)) && *arg != '\0') {
726: if (options->num_deny_users >= MAX_DENY_USERS)
727: fatal( "%s line %d: too many deny users.",
728: filename, linenum);
1.112 deraadt 729: options->deny_users[options->num_deny_users++] =
730: xstrdup(arg);
1.94 markus 731: }
732: break;
1.25 markus 733:
1.94 markus 734: case sAllowGroups:
735: while ((arg = strdelim(&cp)) && *arg != '\0') {
736: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
737: fatal("%s line %d: too many allow groups.",
738: filename, linenum);
1.112 deraadt 739: options->allow_groups[options->num_allow_groups++] =
740: xstrdup(arg);
1.94 markus 741: }
742: break;
1.33 markus 743:
1.94 markus 744: case sDenyGroups:
745: while ((arg = strdelim(&cp)) && *arg != '\0') {
746: if (options->num_deny_groups >= MAX_DENY_GROUPS)
747: fatal("%s line %d: too many deny groups.",
748: filename, linenum);
749: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
750: }
751: break;
1.66 markus 752:
1.94 markus 753: case sCiphers:
754: arg = strdelim(&cp);
755: if (!arg || *arg == '\0')
756: fatal("%s line %d: Missing argument.", filename, linenum);
757: if (!ciphers_valid(arg))
758: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
759: filename, linenum, arg ? arg : "<NONE>");
760: if (options->ciphers == NULL)
761: options->ciphers = xstrdup(arg);
762: break;
1.33 markus 763:
1.94 markus 764: case sMacs:
765: arg = strdelim(&cp);
766: if (!arg || *arg == '\0')
767: fatal("%s line %d: Missing argument.", filename, linenum);
768: if (!mac_valid(arg))
769: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
770: filename, linenum, arg ? arg : "<NONE>");
771: if (options->macs == NULL)
772: options->macs = xstrdup(arg);
773: break;
1.43 jakob 774:
1.94 markus 775: case sProtocol:
776: intptr = &options->protocol;
777: arg = strdelim(&cp);
778: if (!arg || *arg == '\0')
779: fatal("%s line %d: Missing argument.", filename, linenum);
780: value = proto_spec(arg);
781: if (value == SSH_PROTO_UNKNOWN)
782: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 783: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 784: if (*intptr == SSH_PROTO_UNKNOWN)
785: *intptr = value;
786: break;
787:
788: case sSubsystem:
789: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
790: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 791: filename, linenum);
1.94 markus 792: }
793: arg = strdelim(&cp);
794: if (!arg || *arg == '\0')
795: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 796: filename, linenum);
1.94 markus 797: for (i = 0; i < options->num_subsystems; i++)
798: if (strcmp(arg, options->subsystem_name[i]) == 0)
799: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 800: filename, linenum, arg);
1.94 markus 801: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
802: arg = strdelim(&cp);
803: if (!arg || *arg == '\0')
804: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 805: filename, linenum);
1.94 markus 806: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
807: options->num_subsystems++;
808: break;
1.46 markus 809:
1.94 markus 810: case sMaxStartups:
811: arg = strdelim(&cp);
812: if (!arg || *arg == '\0')
813: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 814: filename, linenum);
1.94 markus 815: if ((n = sscanf(arg, "%d:%d:%d",
816: &options->max_startups_begin,
817: &options->max_startups_rate,
818: &options->max_startups)) == 3) {
819: if (options->max_startups_begin >
820: options->max_startups ||
821: options->max_startups_rate > 100 ||
822: options->max_startups_rate < 1)
1.50 markus 823: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 824: filename, linenum);
1.94 markus 825: } else if (n != 1)
826: fatal("%s line %d: Illegal MaxStartups spec.",
827: filename, linenum);
828: else
829: options->max_startups = options->max_startups_begin;
830: break;
831:
832: case sBanner:
833: charptr = &options->banner;
834: goto parse_filename;
835: /*
836: * These options can contain %X options expanded at
837: * connect time, so that you can specify paths like:
838: *
839: * AuthorizedKeysFile /etc/ssh_keys/%u
840: */
841: case sAuthorizedKeysFile:
842: case sAuthorizedKeysFile2:
843: charptr = (opcode == sAuthorizedKeysFile ) ?
844: &options->authorized_keys_file :
845: &options->authorized_keys_file2;
846: goto parse_filename;
847:
848: case sClientAliveInterval:
849: intptr = &options->client_alive_interval;
850: goto parse_time;
851:
852: case sClientAliveCountMax:
853: intptr = &options->client_alive_count_max;
854: goto parse_int;
1.131 ! djm 855:
! 856: case sAcceptEnv:
! 857: while ((arg = strdelim(&cp)) && *arg != '\0') {
! 858: if (strchr(arg, '=') != NULL)
! 859: fatal("%s line %d: Invalid environment name.",
! 860: filename, linenum);
! 861: if (options->num_accept_env >= MAX_ACCEPT_ENV)
! 862: fatal("%s line %d: too many allow env.",
! 863: filename, linenum);
! 864: options->accept_env[options->num_accept_env++] =
! 865: xstrdup(arg);
! 866: }
! 867: break;
1.94 markus 868:
869: case sDeprecated:
1.117 itojun 870: logit("%s line %d: Deprecated option %s",
1.121 jakob 871: filename, linenum, arg);
872: while (arg)
873: arg = strdelim(&cp);
874: break;
875:
876: case sUnsupported:
877: logit("%s line %d: Unsupported option %s",
1.94 markus 878: filename, linenum, arg);
879: while (arg)
880: arg = strdelim(&cp);
881: break;
882:
883: default:
884: fatal("%s line %d: Missing handler for opcode %s (%d)",
885: filename, linenum, arg, opcode);
886: }
887: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
888: fatal("%s line %d: garbage at end of line; \"%.200s\".",
889: filename, linenum, arg);
890: return 0;
891: }
892:
893: /* Reads the server configuration file. */
1.25 markus 894:
1.94 markus 895: void
896: read_server_config(ServerOptions *options, const char *filename)
897: {
1.112 deraadt 898: int linenum, bad_options = 0;
899: char line[1024];
1.94 markus 900: FILE *f;
1.81 stevesk 901:
1.116 markus 902: debug2("read_server_config: filename %s", filename);
1.94 markus 903: f = fopen(filename, "r");
904: if (!f) {
905: perror(filename);
906: exit(1);
907: }
908: linenum = 0;
909: while (fgets(line, sizeof(line), f)) {
910: /* Update line number counter. */
911: linenum++;
912: if (process_server_config_line(options, line, filename, linenum) != 0)
913: bad_options++;
1.1 deraadt 914: }
1.25 markus 915: fclose(f);
1.78 stevesk 916: if (bad_options > 0)
917: fatal("%s: terminating, %d bad configuration options",
918: filename, bad_options);
1.1 deraadt 919: }
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