Annotation of src/usr.bin/ssh/servconf.c, Revision 1.90
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"
1.90 ! markus 13: RCSID("$OpenBSD: servconf.c,v 1.89 2001/08/16 19:18:34 jakob Exp $");
1.62 markus 14:
1.88 itojun 15: #if defined(KRB4) || defined(KRB5)
1.62 markus 16: #include <krb.h>
1.86 dugsong 17: #endif
18: #ifdef AFS
19: #include <kafs.h>
1.62 markus 20: #endif
1.1 deraadt 21:
22: #include "ssh.h"
1.62 markus 23: #include "log.h"
1.1 deraadt 24: #include "servconf.h"
25: #include "xmalloc.h"
1.33 markus 26: #include "compat.h"
1.60 markus 27: #include "pathnames.h"
1.62 markus 28: #include "tildexpand.h"
29: #include "misc.h"
30: #include "cipher.h"
1.66 markus 31: #include "kex.h"
32: #include "mac.h"
1.1 deraadt 33:
1.84 itojun 34: static void add_listen_addr(ServerOptions *, char *, u_short);
35: static void add_one_listen_addr(ServerOptions *, char *, u_short);
1.29 markus 36:
1.62 markus 37: /* AF_UNSPEC or AF_INET or AF_INET6 */
38: extern int IPv4or6;
39:
1.1 deraadt 40: /* Initializes the server options to their default values. */
41:
1.34 markus 42: void
1.25 markus 43: initialize_server_options(ServerOptions *options)
1.1 deraadt 44: {
1.25 markus 45: memset(options, 0, sizeof(*options));
1.29 markus 46: options->num_ports = 0;
47: options->ports_from_cmdline = 0;
48: options->listen_addrs = NULL;
1.54 markus 49: options->num_host_key_files = 0;
1.36 markus 50: options->pid_file = NULL;
1.25 markus 51: options->server_key_bits = -1;
52: options->login_grace_time = -1;
53: options->key_regeneration_time = -1;
1.67 markus 54: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 55: options->ignore_rhosts = -1;
56: options->ignore_user_known_hosts = -1;
57: options->print_motd = -1;
1.72 stevesk 58: options->print_lastlog = -1;
1.25 markus 59: options->x11_forwarding = -1;
60: options->x11_display_offset = -1;
1.42 markus 61: options->xauth_location = NULL;
1.25 markus 62: options->strict_modes = -1;
63: options->keepalives = -1;
64: options->log_facility = (SyslogFacility) - 1;
65: options->log_level = (LogLevel) - 1;
66: options->rhosts_authentication = -1;
67: options->rhosts_rsa_authentication = -1;
1.75 markus 68: options->hostbased_authentication = -1;
69: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 70: options->rsa_authentication = -1;
1.54 markus 71: options->pubkey_authentication = -1;
1.85 dugsong 72: #if defined(KRB4) || defined(KRB5)
1.25 markus 73: options->kerberos_authentication = -1;
74: options->kerberos_or_local_passwd = -1;
75: options->kerberos_ticket_cleanup = -1;
1.1 deraadt 76: #endif
1.85 dugsong 77: #if defined(AFS) || defined(KRB5)
78: options->kerberos_tgt_passing = -1;
79: #endif
1.4 dugsong 80: #ifdef AFS
1.25 markus 81: options->afs_token_passing = -1;
1.1 deraadt 82: #endif
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;
87: options->use_login = -1;
1.53 markus 88: options->allow_tcp_forwarding = -1;
1.25 markus 89: options->num_allow_users = 0;
90: options->num_deny_users = 0;
91: options->num_allow_groups = 0;
92: options->num_deny_groups = 0;
1.33 markus 93: options->ciphers = NULL;
1.66 markus 94: options->macs = NULL;
1.33 markus 95: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 96: options->gateway_ports = -1;
1.43 jakob 97: options->num_subsystems = 0;
1.50 markus 98: options->max_startups_begin = -1;
99: options->max_startups_rate = -1;
1.46 markus 100: options->max_startups = -1;
1.57 markus 101: options->banner = NULL;
1.64 markus 102: options->reverse_mapping_check = -1;
1.77 beck 103: options->client_alive_interval = -1;
104: options->client_alive_count_max = -1;
1.82 markus 105: options->authorized_keys_file = NULL;
106: options->authorized_keys_file2 = NULL;
1.1 deraadt 107: }
108:
1.34 markus 109: void
1.25 markus 110: fill_default_server_options(ServerOptions *options)
1.1 deraadt 111: {
1.54 markus 112: if (options->protocol == SSH_PROTO_UNKNOWN)
113: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
114: if (options->num_host_key_files == 0) {
115: /* fill default hostkeys for protocols */
116: if (options->protocol & SSH_PROTO_1)
1.60 markus 117: options->host_key_files[options->num_host_key_files++] = _PATH_HOST_KEY_FILE;
1.54 markus 118: if (options->protocol & SSH_PROTO_2)
1.60 markus 119: options->host_key_files[options->num_host_key_files++] = _PATH_HOST_DSA_KEY_FILE;
1.54 markus 120: }
1.29 markus 121: if (options->num_ports == 0)
122: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
123: if (options->listen_addrs == NULL)
1.76 stevesk 124: add_listen_addr(options, NULL, 0);
1.36 markus 125: if (options->pid_file == NULL)
1.60 markus 126: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 127: if (options->server_key_bits == -1)
128: options->server_key_bits = 768;
129: if (options->login_grace_time == -1)
130: options->login_grace_time = 600;
131: if (options->key_regeneration_time == -1)
132: options->key_regeneration_time = 3600;
1.67 markus 133: if (options->permit_root_login == PERMIT_NOT_SET)
134: options->permit_root_login = PERMIT_YES;
1.25 markus 135: if (options->ignore_rhosts == -1)
1.30 markus 136: options->ignore_rhosts = 1;
1.25 markus 137: if (options->ignore_user_known_hosts == -1)
138: options->ignore_user_known_hosts = 0;
139: if (options->print_motd == -1)
140: options->print_motd = 1;
1.72 stevesk 141: if (options->print_lastlog == -1)
142: options->print_lastlog = 1;
1.25 markus 143: if (options->x11_forwarding == -1)
1.30 markus 144: options->x11_forwarding = 0;
1.25 markus 145: if (options->x11_display_offset == -1)
1.30 markus 146: options->x11_display_offset = 10;
1.83 markus 147: #ifdef _PATH_XAUTH
1.42 markus 148: if (options->xauth_location == NULL)
1.83 markus 149: options->xauth_location = _PATH_XAUTH;
150: #endif
1.25 markus 151: if (options->strict_modes == -1)
152: options->strict_modes = 1;
153: if (options->keepalives == -1)
154: options->keepalives = 1;
155: if (options->log_facility == (SyslogFacility) (-1))
156: options->log_facility = SYSLOG_FACILITY_AUTH;
157: if (options->log_level == (LogLevel) (-1))
1.58 markus 158: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 159: if (options->rhosts_authentication == -1)
160: options->rhosts_authentication = 0;
161: if (options->rhosts_rsa_authentication == -1)
1.30 markus 162: options->rhosts_rsa_authentication = 0;
1.75 markus 163: if (options->hostbased_authentication == -1)
164: options->hostbased_authentication = 0;
165: if (options->hostbased_uses_name_from_packet_only == -1)
166: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 167: if (options->rsa_authentication == -1)
168: options->rsa_authentication = 1;
1.54 markus 169: if (options->pubkey_authentication == -1)
170: options->pubkey_authentication = 1;
1.85 dugsong 171: #if defined(KRB4) || defined(KRB5)
1.25 markus 172: if (options->kerberos_authentication == -1)
173: options->kerberos_authentication = (access(KEYFILE, R_OK) == 0);
174: if (options->kerberos_or_local_passwd == -1)
175: options->kerberos_or_local_passwd = 1;
176: if (options->kerberos_ticket_cleanup == -1)
177: options->kerberos_ticket_cleanup = 1;
1.85 dugsong 178: #endif
179: #if defined(AFS) || defined(KRB5)
1.25 markus 180: if (options->kerberos_tgt_passing == -1)
181: options->kerberos_tgt_passing = 0;
1.85 dugsong 182: #endif
183: #ifdef AFS
1.25 markus 184: if (options->afs_token_passing == -1)
185: options->afs_token_passing = k_hasafs();
1.85 dugsong 186: #endif
1.25 markus 187: if (options->password_authentication == -1)
188: options->password_authentication = 1;
1.52 markus 189: if (options->kbd_interactive_authentication == -1)
190: options->kbd_interactive_authentication = 0;
1.80 markus 191: if (options->challenge_response_authentication == -1)
192: options->challenge_response_authentication = 1;
1.25 markus 193: if (options->permit_empty_passwd == -1)
1.30 markus 194: options->permit_empty_passwd = 0;
1.25 markus 195: if (options->use_login == -1)
196: options->use_login = 0;
1.53 markus 197: if (options->allow_tcp_forwarding == -1)
198: options->allow_tcp_forwarding = 1;
1.38 markus 199: if (options->gateway_ports == -1)
200: options->gateway_ports = 0;
1.46 markus 201: if (options->max_startups == -1)
202: options->max_startups = 10;
1.50 markus 203: if (options->max_startups_rate == -1)
204: options->max_startups_rate = 100; /* 100% */
205: if (options->max_startups_begin == -1)
206: options->max_startups_begin = options->max_startups;
1.64 markus 207: if (options->reverse_mapping_check == -1)
208: options->reverse_mapping_check = 0;
1.77 beck 209: if (options->client_alive_interval == -1)
210: options->client_alive_interval = 0;
211: if (options->client_alive_count_max == -1)
212: options->client_alive_count_max = 3;
1.82 markus 213: if (options->authorized_keys_file == NULL)
214: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.90 ! markus 215: if (options->authorized_keys_file2 == NULL) {
! 216: /* authorized_keys_file2 falls back to authorized_keys_file */
! 217: if (options->authorized_keys_file != NULL)
! 218: options->authorized_keys_file2 = options->authorized_keys_file;
! 219: else
! 220: options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2;
! 221: }
! 222: if (options->authorized_keys_file == NULL)
! 223: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.1 deraadt 224: }
225:
226: /* Keyword tokens. */
1.25 markus 227: typedef enum {
228: sBadOption, /* == unknown option */
229: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
230: sPermitRootLogin, sLogFacility, sLogLevel,
231: sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication,
1.85 dugsong 232: #if defined(KRB4) || defined(KRB5)
1.25 markus 233: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.1 deraadt 234: #endif
1.85 dugsong 235: #if defined(AFS) || defined(KRB5)
236: sKerberosTgtPassing,
237: #endif
1.1 deraadt 238: #ifdef AFS
1.85 dugsong 239: sAFSTokenPassing,
1.1 deraadt 240: #endif
1.63 markus 241: sChallengeResponseAuthentication,
1.52 markus 242: sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
1.72 stevesk 243: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
244: sX11Forwarding, sX11DisplayOffset,
1.89 jakob 245: sStrictModes, sEmptyPasswd, sKeepAlives,
1.53 markus 246: sUseLogin, sAllowTcpForwarding,
247: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 248: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.54 markus 249: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
1.75 markus 250: sBanner, sReverseMappingCheck, sHostbasedAuthentication,
1.77 beck 251: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 252: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
253: sDeprecated
1.1 deraadt 254: } ServerOpCodes;
255:
256: /* Textual representation of the tokens. */
1.25 markus 257: static struct {
258: const char *name;
259: ServerOpCodes opcode;
260: } keywords[] = {
261: { "port", sPort },
262: { "hostkey", sHostKeyFile },
1.54 markus 263: { "hostdsakey", sHostKeyFile }, /* alias */
1.65 stevesk 264: { "pidfile", sPidFile },
1.25 markus 265: { "serverkeybits", sServerKeyBits },
266: { "logingracetime", sLoginGraceTime },
267: { "keyregenerationinterval", sKeyRegenerationTime },
268: { "permitrootlogin", sPermitRootLogin },
269: { "syslogfacility", sLogFacility },
270: { "loglevel", sLogLevel },
271: { "rhostsauthentication", sRhostsAuthentication },
272: { "rhostsrsaauthentication", sRhostsRSAAuthentication },
1.75 markus 273: { "hostbasedauthentication", sHostbasedAuthentication },
274: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly },
1.25 markus 275: { "rsaauthentication", sRSAAuthentication },
1.54 markus 276: { "pubkeyauthentication", sPubkeyAuthentication },
277: { "dsaauthentication", sPubkeyAuthentication }, /* alias */
1.85 dugsong 278: #if defined(KRB4) || defined(KRB5)
1.25 markus 279: { "kerberosauthentication", sKerberosAuthentication },
280: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
281: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.1 deraadt 282: #endif
1.85 dugsong 283: #if defined(AFS) || defined(KRB5)
284: { "kerberostgtpassing", sKerberosTgtPassing },
285: #endif
1.4 dugsong 286: #ifdef AFS
1.25 markus 287: { "afstokenpassing", sAFSTokenPassing },
1.1 deraadt 288: #endif
1.25 markus 289: { "passwordauthentication", sPasswordAuthentication },
1.52 markus 290: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
1.63 markus 291: { "challengeresponseauthentication", sChallengeResponseAuthentication },
292: { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
1.89 jakob 293: { "checkmail", sDeprecated },
1.25 markus 294: { "listenaddress", sListenAddress },
295: { "printmotd", sPrintMotd },
1.72 stevesk 296: { "printlastlog", sPrintLastLog },
1.25 markus 297: { "ignorerhosts", sIgnoreRhosts },
298: { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
299: { "x11forwarding", sX11Forwarding },
300: { "x11displayoffset", sX11DisplayOffset },
1.42 markus 301: { "xauthlocation", sXAuthLocation },
1.25 markus 302: { "strictmodes", sStrictModes },
303: { "permitemptypasswords", sEmptyPasswd },
304: { "uselogin", sUseLogin },
305: { "keepalive", sKeepAlives },
1.53 markus 306: { "allowtcpforwarding", sAllowTcpForwarding },
1.25 markus 307: { "allowusers", sAllowUsers },
308: { "denyusers", sDenyUsers },
309: { "allowgroups", sAllowGroups },
310: { "denygroups", sDenyGroups },
1.33 markus 311: { "ciphers", sCiphers },
1.66 markus 312: { "macs", sMacs },
1.33 markus 313: { "protocol", sProtocol },
1.38 markus 314: { "gatewayports", sGatewayPorts },
1.43 jakob 315: { "subsystem", sSubsystem },
1.46 markus 316: { "maxstartups", sMaxStartups },
1.57 markus 317: { "banner", sBanner },
1.64 markus 318: { "reversemappingcheck", sReverseMappingCheck },
1.77 beck 319: { "clientaliveinterval", sClientAliveInterval },
320: { "clientalivecountmax", sClientAliveCountMax },
1.82 markus 321: { "authorizedkeysfile", sAuthorizedKeysFile },
322: { "authorizedkeysfile2", sAuthorizedKeysFile2 },
1.25 markus 323: { NULL, 0 }
1.1 deraadt 324: };
325:
1.27 markus 326: /*
1.73 stevesk 327: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 328: */
1.1 deraadt 329:
1.34 markus 330: static ServerOpCodes
1.25 markus 331: parse_token(const char *cp, const char *filename,
332: int linenum)
1.1 deraadt 333: {
1.55 markus 334: u_int i;
1.1 deraadt 335:
1.25 markus 336: for (i = 0; keywords[i].name; i++)
1.28 markus 337: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 338: return keywords[i].opcode;
339:
1.78 stevesk 340: error("%s: line %d: Bad configuration option: %s",
341: filename, linenum, cp);
1.25 markus 342: return sBadOption;
1.1 deraadt 343: }
344:
1.84 itojun 345: static void
1.76 stevesk 346: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 347: {
348: int i;
349:
350: if (options->num_ports == 0)
351: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.76 stevesk 352: if (port == 0)
1.74 stevesk 353: for (i = 0; i < options->num_ports; i++)
354: add_one_listen_addr(options, addr, options->ports[i]);
355: else
1.76 stevesk 356: add_one_listen_addr(options, addr, port);
1.74 stevesk 357: }
358:
1.84 itojun 359: static void
1.74 stevesk 360: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 361: {
362: struct addrinfo hints, *ai, *aitop;
363: char strport[NI_MAXSERV];
364: int gaierr;
365:
1.74 stevesk 366: memset(&hints, 0, sizeof(hints));
367: hints.ai_family = IPv4or6;
368: hints.ai_socktype = SOCK_STREAM;
369: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
370: snprintf(strport, sizeof strport, "%d", port);
371: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
372: fatal("bad addr or host: %s (%s)",
373: addr ? addr : "<NULL>",
374: gai_strerror(gaierr));
375: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
376: ;
377: ai->ai_next = options->listen_addrs;
378: options->listen_addrs = aitop;
1.29 markus 379: }
380:
1.1 deraadt 381: /* Reads the server configuration file. */
382:
1.34 markus 383: void
1.25 markus 384: read_server_config(ServerOptions *options, const char *filename)
1.1 deraadt 385: {
1.25 markus 386: FILE *f;
387: char line[1024];
1.74 stevesk 388: char *cp, **charptr, *arg, *p;
1.25 markus 389: int linenum, *intptr, value;
390: int bad_options = 0;
391: ServerOpCodes opcode;
1.87 stevesk 392: int i, n;
1.25 markus 393:
394: f = fopen(filename, "r");
395: if (!f) {
396: perror(filename);
1.1 deraadt 397: exit(1);
1.25 markus 398: }
399: linenum = 0;
400: while (fgets(line, sizeof(line), f)) {
401: linenum++;
1.48 provos 402: cp = line;
403: arg = strdelim(&cp);
404: /* Ignore leading whitespace */
405: if (*arg == '\0')
1.49 markus 406: arg = strdelim(&cp);
1.61 djm 407: if (!arg || !*arg || *arg == '#')
1.25 markus 408: continue;
1.54 markus 409: intptr = NULL;
410: charptr = NULL;
1.47 ho 411: opcode = parse_token(arg, filename, linenum);
1.25 markus 412: switch (opcode) {
413: case sBadOption:
414: bad_options++;
415: continue;
416: case sPort:
1.29 markus 417: /* ignore ports from configfile if cmdline specifies ports */
418: if (options->ports_from_cmdline)
419: continue;
420: if (options->listen_addrs != NULL)
421: fatal("%s line %d: ports must be specified before "
1.79 stevesk 422: "ListenAdress.", filename, linenum);
1.29 markus 423: if (options->num_ports >= MAX_PORTS)
1.70 millert 424: fatal("%s line %d: too many ports.",
1.34 markus 425: filename, linenum);
1.48 provos 426: arg = strdelim(&cp);
1.47 ho 427: if (!arg || *arg == '\0')
1.70 millert 428: fatal("%s line %d: missing port number.",
1.29 markus 429: filename, linenum);
1.76 stevesk 430: options->ports[options->num_ports++] = a2port(arg);
431: if (options->ports[options->num_ports-1] == 0)
432: fatal("%s line %d: Badly formatted port number.",
433: filename, linenum);
1.29 markus 434: break;
435:
436: case sServerKeyBits:
437: intptr = &options->server_key_bits;
1.25 markus 438: parse_int:
1.48 provos 439: arg = strdelim(&cp);
1.78 stevesk 440: if (!arg || *arg == '\0')
441: fatal("%s line %d: missing integer value.",
442: filename, linenum);
1.47 ho 443: value = atoi(arg);
1.25 markus 444: if (*intptr == -1)
445: *intptr = value;
446: break;
447:
448: case sLoginGraceTime:
449: intptr = &options->login_grace_time;
1.81 stevesk 450: parse_time:
451: arg = strdelim(&cp);
452: if (!arg || *arg == '\0')
453: fatal("%s line %d: missing time value.",
454: filename, linenum);
455: if ((value = convtime(arg)) == -1)
456: fatal("%s line %d: invalid time value.",
457: filename, linenum);
458: if (*intptr == -1)
459: *intptr = value;
460: break;
1.25 markus 461:
462: case sKeyRegenerationTime:
463: intptr = &options->key_regeneration_time;
1.81 stevesk 464: goto parse_time;
1.25 markus 465:
466: case sListenAddress:
1.48 provos 467: arg = strdelim(&cp);
1.74 stevesk 468: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
1.70 millert 469: fatal("%s line %d: missing inet addr.",
1.29 markus 470: filename, linenum);
1.74 stevesk 471: if (*arg == '[') {
472: if ((p = strchr(arg, ']')) == NULL)
473: fatal("%s line %d: bad ipv6 inet addr usage.",
474: filename, linenum);
475: arg++;
476: memmove(p, p+1, strlen(p+1)+1);
477: } else if (((p = strchr(arg, ':')) == NULL) ||
478: (strchr(p+1, ':') != NULL)) {
1.76 stevesk 479: add_listen_addr(options, arg, 0);
1.74 stevesk 480: break;
481: }
482: if (*p == ':') {
1.76 stevesk 483: u_short port;
484:
1.74 stevesk 485: p++;
486: if (*p == '\0')
487: fatal("%s line %d: bad inet addr:port usage.",
488: filename, linenum);
489: else {
490: *(p-1) = '\0';
1.76 stevesk 491: if ((port = a2port(p)) == 0)
492: fatal("%s line %d: bad port number.",
493: filename, linenum);
494: add_listen_addr(options, arg, port);
1.74 stevesk 495: }
496: } else if (*p == '\0')
1.76 stevesk 497: add_listen_addr(options, arg, 0);
1.74 stevesk 498: else
499: fatal("%s line %d: bad inet addr usage.",
500: filename, linenum);
1.25 markus 501: break;
502:
503: case sHostKeyFile:
1.54 markus 504: intptr = &options->num_host_key_files;
1.78 stevesk 505: if (*intptr >= MAX_HOSTKEYS)
506: fatal("%s line %d: too many host keys specified (max %d).",
1.54 markus 507: filename, linenum, MAX_HOSTKEYS);
508: charptr = &options->host_key_files[*intptr];
1.42 markus 509: parse_filename:
1.48 provos 510: arg = strdelim(&cp);
1.78 stevesk 511: if (!arg || *arg == '\0')
512: fatal("%s line %d: missing file name.",
1.36 markus 513: filename, linenum);
1.54 markus 514: if (*charptr == NULL) {
1.47 ho 515: *charptr = tilde_expand_filename(arg, getuid());
1.54 markus 516: /* increase optional counter */
517: if (intptr != NULL)
518: *intptr = *intptr + 1;
519: }
1.36 markus 520: break;
521:
522: case sPidFile:
523: charptr = &options->pid_file;
1.42 markus 524: goto parse_filename;
1.25 markus 525:
526: case sPermitRootLogin:
527: intptr = &options->permit_root_login;
1.48 provos 528: arg = strdelim(&cp);
1.78 stevesk 529: if (!arg || *arg == '\0')
530: fatal("%s line %d: missing yes/"
1.71 stevesk 531: "without-password/forced-commands-only/no "
1.78 stevesk 532: "argument.", filename, linenum);
533: value = 0; /* silence compiler */
1.47 ho 534: if (strcmp(arg, "without-password") == 0)
1.67 markus 535: value = PERMIT_NO_PASSWD;
536: else if (strcmp(arg, "forced-commands-only") == 0)
537: value = PERMIT_FORCED_ONLY;
1.47 ho 538: else if (strcmp(arg, "yes") == 0)
1.67 markus 539: value = PERMIT_YES;
1.47 ho 540: else if (strcmp(arg, "no") == 0)
1.67 markus 541: value = PERMIT_NO;
1.78 stevesk 542: else
543: fatal("%s line %d: Bad yes/"
1.67 markus 544: "without-password/forced-commands-only/no "
1.78 stevesk 545: "argument: %s", filename, linenum, arg);
1.25 markus 546: if (*intptr == -1)
547: *intptr = value;
548: break;
549:
550: case sIgnoreRhosts:
551: intptr = &options->ignore_rhosts;
552: parse_flag:
1.48 provos 553: arg = strdelim(&cp);
1.78 stevesk 554: if (!arg || *arg == '\0')
555: fatal("%s line %d: missing yes/no argument.",
556: filename, linenum);
557: value = 0; /* silence compiler */
1.47 ho 558: if (strcmp(arg, "yes") == 0)
1.25 markus 559: value = 1;
1.47 ho 560: else if (strcmp(arg, "no") == 0)
1.25 markus 561: value = 0;
1.78 stevesk 562: else
563: fatal("%s line %d: Bad yes/no argument: %s",
1.47 ho 564: filename, linenum, arg);
1.25 markus 565: if (*intptr == -1)
566: *intptr = value;
567: break;
568:
569: case sIgnoreUserKnownHosts:
570: intptr = &options->ignore_user_known_hosts;
1.31 markus 571: goto parse_flag;
1.25 markus 572:
573: case sRhostsAuthentication:
574: intptr = &options->rhosts_authentication;
575: goto parse_flag;
576:
577: case sRhostsRSAAuthentication:
578: intptr = &options->rhosts_rsa_authentication;
1.75 markus 579: goto parse_flag;
580:
581: case sHostbasedAuthentication:
582: intptr = &options->hostbased_authentication;
583: goto parse_flag;
584:
585: case sHostbasedUsesNameFromPacketOnly:
586: intptr = &options->hostbased_uses_name_from_packet_only;
1.25 markus 587: goto parse_flag;
588:
589: case sRSAAuthentication:
590: intptr = &options->rsa_authentication;
1.39 markus 591: goto parse_flag;
592:
1.54 markus 593: case sPubkeyAuthentication:
594: intptr = &options->pubkey_authentication;
1.25 markus 595: goto parse_flag;
1.85 dugsong 596: #if defined(KRB4) || defined(KRB5)
1.25 markus 597: case sKerberosAuthentication:
598: intptr = &options->kerberos_authentication;
599: goto parse_flag;
600:
601: case sKerberosOrLocalPasswd:
602: intptr = &options->kerberos_or_local_passwd;
603: goto parse_flag;
604:
605: case sKerberosTicketCleanup:
606: intptr = &options->kerberos_ticket_cleanup;
607: goto parse_flag;
1.1 deraadt 608: #endif
1.85 dugsong 609: #if defined(AFS) || defined(KRB5)
1.25 markus 610: case sKerberosTgtPassing:
611: intptr = &options->kerberos_tgt_passing;
612: goto parse_flag;
1.85 dugsong 613: #endif
614: #ifdef AFS
1.25 markus 615: case sAFSTokenPassing:
616: intptr = &options->afs_token_passing;
617: goto parse_flag;
618: #endif
619:
620: case sPasswordAuthentication:
621: intptr = &options->password_authentication;
1.52 markus 622: goto parse_flag;
623:
624: case sKbdInteractiveAuthentication:
625: intptr = &options->kbd_interactive_authentication;
1.25 markus 626: goto parse_flag;
627:
1.63 markus 628: case sChallengeResponseAuthentication:
1.80 markus 629: intptr = &options->challenge_response_authentication;
1.25 markus 630: goto parse_flag;
631:
632: case sPrintMotd:
633: intptr = &options->print_motd;
1.72 stevesk 634: goto parse_flag;
635:
636: case sPrintLastLog:
637: intptr = &options->print_lastlog;
1.25 markus 638: goto parse_flag;
639:
640: case sX11Forwarding:
641: intptr = &options->x11_forwarding;
642: goto parse_flag;
643:
644: case sX11DisplayOffset:
645: intptr = &options->x11_display_offset;
646: goto parse_int;
647:
1.42 markus 648: case sXAuthLocation:
649: charptr = &options->xauth_location;
650: goto parse_filename;
1.65 stevesk 651:
1.25 markus 652: case sStrictModes:
653: intptr = &options->strict_modes;
654: goto parse_flag;
655:
656: case sKeepAlives:
657: intptr = &options->keepalives;
658: goto parse_flag;
659:
660: case sEmptyPasswd:
661: intptr = &options->permit_empty_passwd;
662: goto parse_flag;
663:
664: case sUseLogin:
665: intptr = &options->use_login;
1.38 markus 666: goto parse_flag;
667:
668: case sGatewayPorts:
669: intptr = &options->gateway_ports;
1.64 markus 670: goto parse_flag;
671:
672: case sReverseMappingCheck:
673: intptr = &options->reverse_mapping_check;
1.25 markus 674: goto parse_flag;
675:
676: case sLogFacility:
677: intptr = (int *) &options->log_facility;
1.48 provos 678: arg = strdelim(&cp);
1.47 ho 679: value = log_facility_number(arg);
1.25 markus 680: if (value == (SyslogFacility) - 1)
1.70 millert 681: fatal("%.200s line %d: unsupported log facility '%s'",
1.47 ho 682: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 683: if (*intptr == -1)
684: *intptr = (SyslogFacility) value;
685: break;
686:
687: case sLogLevel:
688: intptr = (int *) &options->log_level;
1.48 provos 689: arg = strdelim(&cp);
1.47 ho 690: value = log_level_number(arg);
1.25 markus 691: if (value == (LogLevel) - 1)
1.70 millert 692: fatal("%.200s line %d: unsupported log level '%s'",
1.47 ho 693: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 694: if (*intptr == -1)
695: *intptr = (LogLevel) value;
696: break;
1.53 markus 697:
698: case sAllowTcpForwarding:
699: intptr = &options->allow_tcp_forwarding;
700: goto parse_flag;
1.25 markus 701:
702: case sAllowUsers:
1.48 provos 703: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.33 markus 704: if (options->num_allow_users >= MAX_ALLOW_USERS)
1.70 millert 705: fatal("%s line %d: too many allow users.",
1.33 markus 706: filename, linenum);
1.47 ho 707: options->allow_users[options->num_allow_users++] = xstrdup(arg);
1.25 markus 708: }
709: break;
710:
711: case sDenyUsers:
1.48 provos 712: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.33 markus 713: if (options->num_deny_users >= MAX_DENY_USERS)
1.70 millert 714: fatal( "%s line %d: too many deny users.",
1.33 markus 715: filename, linenum);
1.47 ho 716: options->deny_users[options->num_deny_users++] = xstrdup(arg);
1.25 markus 717: }
718: break;
719:
720: case sAllowGroups:
1.48 provos 721: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.33 markus 722: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
1.70 millert 723: fatal("%s line %d: too many allow groups.",
1.33 markus 724: filename, linenum);
1.47 ho 725: options->allow_groups[options->num_allow_groups++] = xstrdup(arg);
1.25 markus 726: }
727: break;
728:
729: case sDenyGroups:
1.48 provos 730: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.33 markus 731: if (options->num_deny_groups >= MAX_DENY_GROUPS)
1.70 millert 732: fatal("%s line %d: too many deny groups.",
1.33 markus 733: filename, linenum);
1.47 ho 734: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
1.25 markus 735: }
1.33 markus 736: break;
737:
738: case sCiphers:
1.48 provos 739: arg = strdelim(&cp);
1.47 ho 740: if (!arg || *arg == '\0')
1.41 markus 741: fatal("%s line %d: Missing argument.", filename, linenum);
1.47 ho 742: if (!ciphers_valid(arg))
1.40 markus 743: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1.47 ho 744: filename, linenum, arg ? arg : "<NONE>");
1.33 markus 745: if (options->ciphers == NULL)
1.47 ho 746: options->ciphers = xstrdup(arg);
1.66 markus 747: break;
748:
749: case sMacs:
750: arg = strdelim(&cp);
751: if (!arg || *arg == '\0')
752: fatal("%s line %d: Missing argument.", filename, linenum);
753: if (!mac_valid(arg))
754: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
755: filename, linenum, arg ? arg : "<NONE>");
756: if (options->macs == NULL)
757: options->macs = xstrdup(arg);
1.33 markus 758: break;
759:
760: case sProtocol:
761: intptr = &options->protocol;
1.48 provos 762: arg = strdelim(&cp);
1.47 ho 763: if (!arg || *arg == '\0')
1.41 markus 764: fatal("%s line %d: Missing argument.", filename, linenum);
1.47 ho 765: value = proto_spec(arg);
1.33 markus 766: if (value == SSH_PROTO_UNKNOWN)
767: fatal("%s line %d: Bad protocol spec '%s'.",
1.47 ho 768: filename, linenum, arg ? arg : "<NONE>");
1.33 markus 769: if (*intptr == SSH_PROTO_UNKNOWN)
770: *intptr = value;
1.43 jakob 771: break;
772:
773: case sSubsystem:
774: if(options->num_subsystems >= MAX_SUBSYSTEMS) {
775: fatal("%s line %d: too many subsystems defined.",
776: filename, linenum);
777: }
1.48 provos 778: arg = strdelim(&cp);
1.47 ho 779: if (!arg || *arg == '\0')
1.43 jakob 780: fatal("%s line %d: Missing subsystem name.",
781: filename, linenum);
782: for (i = 0; i < options->num_subsystems; i++)
1.47 ho 783: if(strcmp(arg, options->subsystem_name[i]) == 0)
1.43 jakob 784: fatal("%s line %d: Subsystem '%s' already defined.",
1.47 ho 785: filename, linenum, arg);
786: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1.48 provos 787: arg = strdelim(&cp);
1.47 ho 788: if (!arg || *arg == '\0')
1.43 jakob 789: fatal("%s line %d: Missing subsystem command.",
790: filename, linenum);
1.47 ho 791: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.43 jakob 792: options->num_subsystems++;
1.25 markus 793: break;
1.46 markus 794:
795: case sMaxStartups:
1.50 markus 796: arg = strdelim(&cp);
797: if (!arg || *arg == '\0')
798: fatal("%s line %d: Missing MaxStartups spec.",
799: filename, linenum);
1.87 stevesk 800: if ((n = sscanf(arg, "%d:%d:%d",
1.50 markus 801: &options->max_startups_begin,
802: &options->max_startups_rate,
1.87 stevesk 803: &options->max_startups)) == 3) {
1.50 markus 804: if (options->max_startups_begin >
805: options->max_startups ||
806: options->max_startups_rate > 100 ||
807: options->max_startups_rate < 1)
1.87 stevesk 808: fatal("%s line %d: Illegal MaxStartups spec.",
809: filename, linenum);
810: } else if (n != 1)
1.50 markus 811: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 812: filename, linenum);
813: else
814: options->max_startups = options->max_startups_begin;
815: break;
1.25 markus 816:
1.57 markus 817: case sBanner:
818: charptr = &options->banner;
1.82 markus 819: goto parse_filename;
820: /*
821: * These options can contain %X options expanded at
822: * connect time, so that you can specify paths like:
823: *
824: * AuthorizedKeysFile /etc/ssh_keys/%u
825: */
826: case sAuthorizedKeysFile:
827: case sAuthorizedKeysFile2:
828: charptr = (opcode == sAuthorizedKeysFile ) ?
829: &options->authorized_keys_file :
830: &options->authorized_keys_file2;
1.57 markus 831: goto parse_filename;
1.81 stevesk 832:
1.77 beck 833: case sClientAliveInterval:
834: intptr = &options->client_alive_interval;
1.81 stevesk 835: goto parse_time;
836:
1.77 beck 837: case sClientAliveCountMax:
838: intptr = &options->client_alive_count_max;
839: goto parse_int;
1.89 jakob 840:
841: case sDeprecated:
842: log("%s line %d: Deprecated option %s",
843: filename, linenum, arg);
844: while(arg)
845: arg = strdelim(&cp);
846: break;
1.81 stevesk 847:
1.25 markus 848: default:
1.78 stevesk 849: fatal("%s line %d: Missing handler for opcode %s (%d)",
850: filename, linenum, arg, opcode);
1.13 markus 851: }
1.78 stevesk 852: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
853: fatal("%s line %d: garbage at end of line; \"%.200s\".",
854: filename, linenum, arg);
1.1 deraadt 855: }
1.25 markus 856: fclose(f);
1.78 stevesk 857: if (bad_options > 0)
858: fatal("%s: terminating, %d bad configuration options",
859: filename, bad_options);
1.1 deraadt 860: }
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