Annotation of src/usr.bin/ssh/servconf.c, Revision 1.76
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"
1.76 ! stevesk 13: RCSID("$OpenBSD: servconf.c,v 1.75 2001/04/12 19:15:25 markus Exp $");
1.62 markus 14:
15: #ifdef KRB4
16: #include <krb.h>
17: #endif
18: #ifdef AFS
19: #include <kafs.h>
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:
1.76 ! stevesk 34: void add_listen_addr(ServerOptions *options, char *addr, u_short port);
1.74 stevesk 35: void add_one_listen_addr(ServerOptions *options, char *addr, u_short port);
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->check_mail = -1;
60: options->x11_forwarding = -1;
61: options->x11_display_offset = -1;
1.42 markus 62: options->xauth_location = NULL;
1.25 markus 63: options->strict_modes = -1;
64: options->keepalives = -1;
65: options->log_facility = (SyslogFacility) - 1;
66: options->log_level = (LogLevel) - 1;
67: options->rhosts_authentication = -1;
68: options->rhosts_rsa_authentication = -1;
1.75 markus 69: options->hostbased_authentication = -1;
70: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 71: options->rsa_authentication = -1;
1.54 markus 72: options->pubkey_authentication = -1;
1.1 deraadt 73: #ifdef KRB4
1.25 markus 74: options->kerberos_authentication = -1;
75: options->kerberos_or_local_passwd = -1;
76: options->kerberos_ticket_cleanup = -1;
1.1 deraadt 77: #endif
1.4 dugsong 78: #ifdef AFS
1.25 markus 79: options->kerberos_tgt_passing = -1;
80: options->afs_token_passing = -1;
1.1 deraadt 81: #endif
1.25 markus 82: options->password_authentication = -1;
1.52 markus 83: options->kbd_interactive_authentication = -1;
1.63 markus 84: options->challenge_reponse_authentication = -1;
1.25 markus 85: options->permit_empty_passwd = -1;
86: options->use_login = -1;
1.53 markus 87: options->allow_tcp_forwarding = -1;
1.25 markus 88: options->num_allow_users = 0;
89: options->num_deny_users = 0;
90: options->num_allow_groups = 0;
91: options->num_deny_groups = 0;
1.33 markus 92: options->ciphers = NULL;
1.66 markus 93: options->macs = NULL;
1.33 markus 94: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 95: options->gateway_ports = -1;
1.43 jakob 96: options->num_subsystems = 0;
1.50 markus 97: options->max_startups_begin = -1;
98: options->max_startups_rate = -1;
1.46 markus 99: options->max_startups = -1;
1.57 markus 100: options->banner = NULL;
1.64 markus 101: options->reverse_mapping_check = -1;
1.1 deraadt 102: }
103:
1.34 markus 104: void
1.25 markus 105: fill_default_server_options(ServerOptions *options)
1.1 deraadt 106: {
1.54 markus 107: if (options->protocol == SSH_PROTO_UNKNOWN)
108: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
109: if (options->num_host_key_files == 0) {
110: /* fill default hostkeys for protocols */
111: if (options->protocol & SSH_PROTO_1)
1.60 markus 112: options->host_key_files[options->num_host_key_files++] = _PATH_HOST_KEY_FILE;
1.54 markus 113: if (options->protocol & SSH_PROTO_2)
1.60 markus 114: options->host_key_files[options->num_host_key_files++] = _PATH_HOST_DSA_KEY_FILE;
1.54 markus 115: }
1.29 markus 116: if (options->num_ports == 0)
117: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
118: if (options->listen_addrs == NULL)
1.76 ! stevesk 119: add_listen_addr(options, NULL, 0);
1.36 markus 120: if (options->pid_file == NULL)
1.60 markus 121: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 122: if (options->server_key_bits == -1)
123: options->server_key_bits = 768;
124: if (options->login_grace_time == -1)
125: options->login_grace_time = 600;
126: if (options->key_regeneration_time == -1)
127: options->key_regeneration_time = 3600;
1.67 markus 128: if (options->permit_root_login == PERMIT_NOT_SET)
129: options->permit_root_login = PERMIT_YES;
1.25 markus 130: if (options->ignore_rhosts == -1)
1.30 markus 131: options->ignore_rhosts = 1;
1.25 markus 132: if (options->ignore_user_known_hosts == -1)
133: options->ignore_user_known_hosts = 0;
134: if (options->check_mail == -1)
135: options->check_mail = 0;
136: if (options->print_motd == -1)
137: options->print_motd = 1;
1.72 stevesk 138: if (options->print_lastlog == -1)
139: options->print_lastlog = 1;
1.25 markus 140: if (options->x11_forwarding == -1)
1.30 markus 141: options->x11_forwarding = 0;
1.25 markus 142: if (options->x11_display_offset == -1)
1.30 markus 143: options->x11_display_offset = 10;
1.42 markus 144: #ifdef XAUTH_PATH
145: if (options->xauth_location == NULL)
146: options->xauth_location = XAUTH_PATH;
147: #endif /* XAUTH_PATH */
1.25 markus 148: if (options->strict_modes == -1)
149: options->strict_modes = 1;
150: if (options->keepalives == -1)
151: options->keepalives = 1;
152: if (options->log_facility == (SyslogFacility) (-1))
153: options->log_facility = SYSLOG_FACILITY_AUTH;
154: if (options->log_level == (LogLevel) (-1))
1.58 markus 155: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 156: if (options->rhosts_authentication == -1)
157: options->rhosts_authentication = 0;
158: if (options->rhosts_rsa_authentication == -1)
1.30 markus 159: options->rhosts_rsa_authentication = 0;
1.75 markus 160: if (options->hostbased_authentication == -1)
161: options->hostbased_authentication = 0;
162: if (options->hostbased_uses_name_from_packet_only == -1)
163: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 164: if (options->rsa_authentication == -1)
165: options->rsa_authentication = 1;
1.54 markus 166: if (options->pubkey_authentication == -1)
167: options->pubkey_authentication = 1;
1.1 deraadt 168: #ifdef KRB4
1.25 markus 169: if (options->kerberos_authentication == -1)
170: options->kerberos_authentication = (access(KEYFILE, R_OK) == 0);
171: if (options->kerberos_or_local_passwd == -1)
172: options->kerberos_or_local_passwd = 1;
173: if (options->kerberos_ticket_cleanup == -1)
174: options->kerberos_ticket_cleanup = 1;
1.4 dugsong 175: #endif /* KRB4 */
176: #ifdef AFS
1.25 markus 177: if (options->kerberos_tgt_passing == -1)
178: options->kerberos_tgt_passing = 0;
179: if (options->afs_token_passing == -1)
180: options->afs_token_passing = k_hasafs();
1.4 dugsong 181: #endif /* AFS */
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;
1.63 markus 186: if (options->challenge_reponse_authentication == -1)
187: options->challenge_reponse_authentication = 1;
1.25 markus 188: if (options->permit_empty_passwd == -1)
1.30 markus 189: options->permit_empty_passwd = 0;
1.25 markus 190: if (options->use_login == -1)
191: options->use_login = 0;
1.53 markus 192: if (options->allow_tcp_forwarding == -1)
193: options->allow_tcp_forwarding = 1;
1.38 markus 194: if (options->gateway_ports == -1)
195: options->gateway_ports = 0;
1.46 markus 196: if (options->max_startups == -1)
197: options->max_startups = 10;
1.50 markus 198: if (options->max_startups_rate == -1)
199: options->max_startups_rate = 100; /* 100% */
200: if (options->max_startups_begin == -1)
201: options->max_startups_begin = options->max_startups;
1.64 markus 202: if (options->reverse_mapping_check == -1)
203: options->reverse_mapping_check = 0;
1.1 deraadt 204: }
205:
206: /* Keyword tokens. */
1.25 markus 207: typedef enum {
208: sBadOption, /* == unknown option */
209: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
210: sPermitRootLogin, sLogFacility, sLogLevel,
211: sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication,
1.1 deraadt 212: #ifdef KRB4
1.25 markus 213: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.1 deraadt 214: #endif
215: #ifdef AFS
1.25 markus 216: sKerberosTgtPassing, sAFSTokenPassing,
1.1 deraadt 217: #endif
1.63 markus 218: sChallengeResponseAuthentication,
1.52 markus 219: sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
1.72 stevesk 220: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
221: sX11Forwarding, sX11DisplayOffset,
1.69 stevesk 222: sStrictModes, sEmptyPasswd, sKeepAlives, sCheckMail,
1.53 markus 223: sUseLogin, sAllowTcpForwarding,
224: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 225: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.54 markus 226: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
1.75 markus 227: sBanner, sReverseMappingCheck, sHostbasedAuthentication,
228: sHostbasedUsesNameFromPacketOnly
1.1 deraadt 229: } ServerOpCodes;
230:
231: /* Textual representation of the tokens. */
1.25 markus 232: static struct {
233: const char *name;
234: ServerOpCodes opcode;
235: } keywords[] = {
236: { "port", sPort },
237: { "hostkey", sHostKeyFile },
1.54 markus 238: { "hostdsakey", sHostKeyFile }, /* alias */
1.65 stevesk 239: { "pidfile", sPidFile },
1.25 markus 240: { "serverkeybits", sServerKeyBits },
241: { "logingracetime", sLoginGraceTime },
242: { "keyregenerationinterval", sKeyRegenerationTime },
243: { "permitrootlogin", sPermitRootLogin },
244: { "syslogfacility", sLogFacility },
245: { "loglevel", sLogLevel },
246: { "rhostsauthentication", sRhostsAuthentication },
247: { "rhostsrsaauthentication", sRhostsRSAAuthentication },
1.75 markus 248: { "hostbasedauthentication", sHostbasedAuthentication },
249: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly },
1.25 markus 250: { "rsaauthentication", sRSAAuthentication },
1.54 markus 251: { "pubkeyauthentication", sPubkeyAuthentication },
252: { "dsaauthentication", sPubkeyAuthentication }, /* alias */
1.1 deraadt 253: #ifdef KRB4
1.25 markus 254: { "kerberosauthentication", sKerberosAuthentication },
255: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
256: { "kerberosticketcleanup", sKerberosTicketCleanup },
1.1 deraadt 257: #endif
1.4 dugsong 258: #ifdef AFS
1.25 markus 259: { "kerberostgtpassing", sKerberosTgtPassing },
260: { "afstokenpassing", sAFSTokenPassing },
1.1 deraadt 261: #endif
1.25 markus 262: { "passwordauthentication", sPasswordAuthentication },
1.52 markus 263: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
1.63 markus 264: { "challengeresponseauthentication", sChallengeResponseAuthentication },
265: { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
1.25 markus 266: { "checkmail", sCheckMail },
267: { "listenaddress", sListenAddress },
268: { "printmotd", sPrintMotd },
1.72 stevesk 269: { "printlastlog", sPrintLastLog },
1.25 markus 270: { "ignorerhosts", sIgnoreRhosts },
271: { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
272: { "x11forwarding", sX11Forwarding },
273: { "x11displayoffset", sX11DisplayOffset },
1.42 markus 274: { "xauthlocation", sXAuthLocation },
1.25 markus 275: { "strictmodes", sStrictModes },
276: { "permitemptypasswords", sEmptyPasswd },
277: { "uselogin", sUseLogin },
278: { "keepalive", sKeepAlives },
1.53 markus 279: { "allowtcpforwarding", sAllowTcpForwarding },
1.25 markus 280: { "allowusers", sAllowUsers },
281: { "denyusers", sDenyUsers },
282: { "allowgroups", sAllowGroups },
283: { "denygroups", sDenyGroups },
1.33 markus 284: { "ciphers", sCiphers },
1.66 markus 285: { "macs", sMacs },
1.33 markus 286: { "protocol", sProtocol },
1.38 markus 287: { "gatewayports", sGatewayPorts },
1.43 jakob 288: { "subsystem", sSubsystem },
1.46 markus 289: { "maxstartups", sMaxStartups },
1.57 markus 290: { "banner", sBanner },
1.64 markus 291: { "reversemappingcheck", sReverseMappingCheck },
1.25 markus 292: { NULL, 0 }
1.1 deraadt 293: };
294:
1.27 markus 295: /*
1.73 stevesk 296: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 297: */
1.1 deraadt 298:
1.34 markus 299: static ServerOpCodes
1.25 markus 300: parse_token(const char *cp, const char *filename,
301: int linenum)
1.1 deraadt 302: {
1.55 markus 303: u_int i;
1.1 deraadt 304:
1.25 markus 305: for (i = 0; keywords[i].name; i++)
1.28 markus 306: if (strcasecmp(cp, keywords[i].name) == 0)
1.25 markus 307: return keywords[i].opcode;
308:
309: fprintf(stderr, "%s: line %d: Bad configuration option: %s\n",
310: filename, linenum, cp);
311: return sBadOption;
1.1 deraadt 312: }
313:
1.34 markus 314: void
1.76 ! stevesk 315: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 316: {
317: int i;
318:
319: if (options->num_ports == 0)
320: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.76 ! stevesk 321: if (port == 0)
1.74 stevesk 322: for (i = 0; i < options->num_ports; i++)
323: add_one_listen_addr(options, addr, options->ports[i]);
324: else
1.76 ! stevesk 325: add_one_listen_addr(options, addr, port);
1.74 stevesk 326: }
327:
328: void
329: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 330: {
331: struct addrinfo hints, *ai, *aitop;
332: char strport[NI_MAXSERV];
333: int gaierr;
334:
1.74 stevesk 335: memset(&hints, 0, sizeof(hints));
336: hints.ai_family = IPv4or6;
337: hints.ai_socktype = SOCK_STREAM;
338: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
339: snprintf(strport, sizeof strport, "%d", port);
340: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
341: fatal("bad addr or host: %s (%s)",
342: addr ? addr : "<NULL>",
343: gai_strerror(gaierr));
344: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
345: ;
346: ai->ai_next = options->listen_addrs;
347: options->listen_addrs = aitop;
1.29 markus 348: }
349:
1.1 deraadt 350: /* Reads the server configuration file. */
351:
1.34 markus 352: void
1.25 markus 353: read_server_config(ServerOptions *options, const char *filename)
1.1 deraadt 354: {
1.25 markus 355: FILE *f;
356: char line[1024];
1.74 stevesk 357: char *cp, **charptr, *arg, *p;
1.25 markus 358: int linenum, *intptr, value;
359: int bad_options = 0;
360: ServerOpCodes opcode;
1.43 jakob 361: int i;
1.25 markus 362:
363: f = fopen(filename, "r");
364: if (!f) {
365: perror(filename);
1.1 deraadt 366: exit(1);
1.25 markus 367: }
368: linenum = 0;
369: while (fgets(line, sizeof(line), f)) {
370: linenum++;
1.48 provos 371: cp = line;
372: arg = strdelim(&cp);
373: /* Ignore leading whitespace */
374: if (*arg == '\0')
1.49 markus 375: arg = strdelim(&cp);
1.61 djm 376: if (!arg || !*arg || *arg == '#')
1.25 markus 377: continue;
1.54 markus 378: intptr = NULL;
379: charptr = NULL;
1.47 ho 380: opcode = parse_token(arg, filename, linenum);
1.25 markus 381: switch (opcode) {
382: case sBadOption:
383: bad_options++;
384: continue;
385: case sPort:
1.29 markus 386: /* ignore ports from configfile if cmdline specifies ports */
387: if (options->ports_from_cmdline)
388: continue;
389: if (options->listen_addrs != NULL)
390: fatal("%s line %d: ports must be specified before "
391: "ListenAdress.\n", filename, linenum);
392: if (options->num_ports >= MAX_PORTS)
1.70 millert 393: fatal("%s line %d: too many ports.",
1.34 markus 394: filename, linenum);
1.48 provos 395: arg = strdelim(&cp);
1.47 ho 396: if (!arg || *arg == '\0')
1.70 millert 397: fatal("%s line %d: missing port number.",
1.29 markus 398: filename, linenum);
1.76 ! stevesk 399: options->ports[options->num_ports++] = a2port(arg);
! 400: if (options->ports[options->num_ports-1] == 0)
! 401: fatal("%s line %d: Badly formatted port number.",
! 402: filename, linenum);
1.29 markus 403: break;
404:
405: case sServerKeyBits:
406: intptr = &options->server_key_bits;
1.25 markus 407: parse_int:
1.48 provos 408: arg = strdelim(&cp);
1.47 ho 409: if (!arg || *arg == '\0') {
1.25 markus 410: fprintf(stderr, "%s line %d: missing integer value.\n",
411: filename, linenum);
412: exit(1);
413: }
1.47 ho 414: value = atoi(arg);
1.25 markus 415: if (*intptr == -1)
416: *intptr = value;
417: break;
418:
419: case sLoginGraceTime:
420: intptr = &options->login_grace_time;
421: goto parse_int;
422:
423: case sKeyRegenerationTime:
424: intptr = &options->key_regeneration_time;
425: goto parse_int;
426:
427: case sListenAddress:
1.48 provos 428: arg = strdelim(&cp);
1.74 stevesk 429: if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0)
1.70 millert 430: fatal("%s line %d: missing inet addr.",
1.29 markus 431: filename, linenum);
1.74 stevesk 432: if (*arg == '[') {
433: if ((p = strchr(arg, ']')) == NULL)
434: fatal("%s line %d: bad ipv6 inet addr usage.",
435: filename, linenum);
436: arg++;
437: memmove(p, p+1, strlen(p+1)+1);
438: } else if (((p = strchr(arg, ':')) == NULL) ||
439: (strchr(p+1, ':') != NULL)) {
1.76 ! stevesk 440: add_listen_addr(options, arg, 0);
1.74 stevesk 441: break;
442: }
443: if (*p == ':') {
1.76 ! stevesk 444: u_short port;
! 445:
1.74 stevesk 446: p++;
447: if (*p == '\0')
448: fatal("%s line %d: bad inet addr:port usage.",
449: filename, linenum);
450: else {
451: *(p-1) = '\0';
1.76 ! stevesk 452: if ((port = a2port(p)) == 0)
! 453: fatal("%s line %d: bad port number.",
! 454: filename, linenum);
! 455: add_listen_addr(options, arg, port);
1.74 stevesk 456: }
457: } else if (*p == '\0')
1.76 ! stevesk 458: add_listen_addr(options, arg, 0);
1.74 stevesk 459: else
460: fatal("%s line %d: bad inet addr usage.",
461: filename, linenum);
1.25 markus 462: break;
463:
464: case sHostKeyFile:
1.54 markus 465: intptr = &options->num_host_key_files;
466: if (*intptr >= MAX_HOSTKEYS) {
1.68 deraadt 467: fprintf(stderr,
468: "%s line %d: too many host keys specified (max %d).\n",
1.54 markus 469: filename, linenum, MAX_HOSTKEYS);
470: exit(1);
471: }
472: charptr = &options->host_key_files[*intptr];
1.42 markus 473: parse_filename:
1.48 provos 474: arg = strdelim(&cp);
1.47 ho 475: if (!arg || *arg == '\0') {
1.25 markus 476: fprintf(stderr, "%s line %d: missing file name.\n",
1.36 markus 477: filename, linenum);
478: exit(1);
479: }
1.54 markus 480: if (*charptr == NULL) {
1.47 ho 481: *charptr = tilde_expand_filename(arg, getuid());
1.54 markus 482: /* increase optional counter */
483: if (intptr != NULL)
484: *intptr = *intptr + 1;
485: }
1.36 markus 486: break;
487:
488: case sPidFile:
489: charptr = &options->pid_file;
1.42 markus 490: goto parse_filename;
1.25 markus 491:
492: case sPermitRootLogin:
493: intptr = &options->permit_root_login;
1.48 provos 494: arg = strdelim(&cp);
1.47 ho 495: if (!arg || *arg == '\0') {
1.71 stevesk 496: fprintf(stderr, "%s line %d: missing yes/"
497: "without-password/forced-commands-only/no "
498: "argument.\n", filename, linenum);
1.25 markus 499: exit(1);
500: }
1.47 ho 501: if (strcmp(arg, "without-password") == 0)
1.67 markus 502: value = PERMIT_NO_PASSWD;
503: else if (strcmp(arg, "forced-commands-only") == 0)
504: value = PERMIT_FORCED_ONLY;
1.47 ho 505: else if (strcmp(arg, "yes") == 0)
1.67 markus 506: value = PERMIT_YES;
1.47 ho 507: else if (strcmp(arg, "no") == 0)
1.67 markus 508: value = PERMIT_NO;
1.25 markus 509: else {
1.67 markus 510: fprintf(stderr, "%s line %d: Bad yes/"
511: "without-password/forced-commands-only/no "
512: "argument: %s\n", filename, linenum, arg);
1.25 markus 513: exit(1);
514: }
515: if (*intptr == -1)
516: *intptr = value;
517: break;
518:
519: case sIgnoreRhosts:
520: intptr = &options->ignore_rhosts;
521: parse_flag:
1.48 provos 522: arg = strdelim(&cp);
1.47 ho 523: if (!arg || *arg == '\0') {
1.25 markus 524: fprintf(stderr, "%s line %d: missing yes/no argument.\n",
525: filename, linenum);
526: exit(1);
527: }
1.47 ho 528: if (strcmp(arg, "yes") == 0)
1.25 markus 529: value = 1;
1.47 ho 530: else if (strcmp(arg, "no") == 0)
1.25 markus 531: value = 0;
532: else {
533: fprintf(stderr, "%s line %d: Bad yes/no argument: %s\n",
1.47 ho 534: filename, linenum, arg);
1.25 markus 535: exit(1);
536: }
537: if (*intptr == -1)
538: *intptr = value;
539: break;
540:
541: case sIgnoreUserKnownHosts:
542: intptr = &options->ignore_user_known_hosts;
1.31 markus 543: goto parse_flag;
1.25 markus 544:
545: case sRhostsAuthentication:
546: intptr = &options->rhosts_authentication;
547: goto parse_flag;
548:
549: case sRhostsRSAAuthentication:
550: intptr = &options->rhosts_rsa_authentication;
1.75 markus 551: goto parse_flag;
552:
553: case sHostbasedAuthentication:
554: intptr = &options->hostbased_authentication;
555: goto parse_flag;
556:
557: case sHostbasedUsesNameFromPacketOnly:
558: intptr = &options->hostbased_uses_name_from_packet_only;
1.25 markus 559: goto parse_flag;
560:
561: case sRSAAuthentication:
562: intptr = &options->rsa_authentication;
1.39 markus 563: goto parse_flag;
564:
1.54 markus 565: case sPubkeyAuthentication:
566: intptr = &options->pubkey_authentication;
1.25 markus 567: goto parse_flag;
568:
1.1 deraadt 569: #ifdef KRB4
1.25 markus 570: case sKerberosAuthentication:
571: intptr = &options->kerberos_authentication;
572: goto parse_flag;
573:
574: case sKerberosOrLocalPasswd:
575: intptr = &options->kerberos_or_local_passwd;
576: goto parse_flag;
577:
578: case sKerberosTicketCleanup:
579: intptr = &options->kerberos_ticket_cleanup;
580: goto parse_flag;
1.1 deraadt 581: #endif
1.25 markus 582:
1.4 dugsong 583: #ifdef AFS
1.25 markus 584: case sKerberosTgtPassing:
585: intptr = &options->kerberos_tgt_passing;
586: goto parse_flag;
587:
588: case sAFSTokenPassing:
589: intptr = &options->afs_token_passing;
590: goto parse_flag;
591: #endif
592:
593: case sPasswordAuthentication:
594: intptr = &options->password_authentication;
1.52 markus 595: goto parse_flag;
596:
597: case sKbdInteractiveAuthentication:
598: intptr = &options->kbd_interactive_authentication;
1.25 markus 599: goto parse_flag;
600:
601: case sCheckMail:
602: intptr = &options->check_mail;
603: goto parse_flag;
1.10 markus 604:
1.63 markus 605: case sChallengeResponseAuthentication:
606: intptr = &options->challenge_reponse_authentication;
1.25 markus 607: goto parse_flag;
608:
609: case sPrintMotd:
610: intptr = &options->print_motd;
1.72 stevesk 611: goto parse_flag;
612:
613: case sPrintLastLog:
614: intptr = &options->print_lastlog;
1.25 markus 615: goto parse_flag;
616:
617: case sX11Forwarding:
618: intptr = &options->x11_forwarding;
619: goto parse_flag;
620:
621: case sX11DisplayOffset:
622: intptr = &options->x11_display_offset;
623: goto parse_int;
624:
1.42 markus 625: case sXAuthLocation:
626: charptr = &options->xauth_location;
627: goto parse_filename;
1.65 stevesk 628:
1.25 markus 629: case sStrictModes:
630: intptr = &options->strict_modes;
631: goto parse_flag;
632:
633: case sKeepAlives:
634: intptr = &options->keepalives;
635: goto parse_flag;
636:
637: case sEmptyPasswd:
638: intptr = &options->permit_empty_passwd;
639: goto parse_flag;
640:
641: case sUseLogin:
642: intptr = &options->use_login;
1.38 markus 643: goto parse_flag;
644:
645: case sGatewayPorts:
646: intptr = &options->gateway_ports;
1.64 markus 647: goto parse_flag;
648:
649: case sReverseMappingCheck:
650: intptr = &options->reverse_mapping_check;
1.25 markus 651: goto parse_flag;
652:
653: case sLogFacility:
654: intptr = (int *) &options->log_facility;
1.48 provos 655: arg = strdelim(&cp);
1.47 ho 656: value = log_facility_number(arg);
1.25 markus 657: if (value == (SyslogFacility) - 1)
1.70 millert 658: fatal("%.200s line %d: unsupported log facility '%s'",
1.47 ho 659: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 660: if (*intptr == -1)
661: *intptr = (SyslogFacility) value;
662: break;
663:
664: case sLogLevel:
665: intptr = (int *) &options->log_level;
1.48 provos 666: arg = strdelim(&cp);
1.47 ho 667: value = log_level_number(arg);
1.25 markus 668: if (value == (LogLevel) - 1)
1.70 millert 669: fatal("%.200s line %d: unsupported log level '%s'",
1.47 ho 670: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 671: if (*intptr == -1)
672: *intptr = (LogLevel) value;
673: break;
1.53 markus 674:
675: case sAllowTcpForwarding:
676: intptr = &options->allow_tcp_forwarding;
677: goto parse_flag;
1.25 markus 678:
679: case sAllowUsers:
1.48 provos 680: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.33 markus 681: if (options->num_allow_users >= MAX_ALLOW_USERS)
1.70 millert 682: fatal("%s line %d: too many allow users.",
1.33 markus 683: filename, linenum);
1.47 ho 684: options->allow_users[options->num_allow_users++] = xstrdup(arg);
1.25 markus 685: }
686: break;
687:
688: case sDenyUsers:
1.48 provos 689: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.33 markus 690: if (options->num_deny_users >= MAX_DENY_USERS)
1.70 millert 691: fatal( "%s line %d: too many deny users.",
1.33 markus 692: filename, linenum);
1.47 ho 693: options->deny_users[options->num_deny_users++] = xstrdup(arg);
1.25 markus 694: }
695: break;
696:
697: case sAllowGroups:
1.48 provos 698: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.33 markus 699: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
1.70 millert 700: fatal("%s line %d: too many allow groups.",
1.33 markus 701: filename, linenum);
1.47 ho 702: options->allow_groups[options->num_allow_groups++] = xstrdup(arg);
1.25 markus 703: }
704: break;
705:
706: case sDenyGroups:
1.48 provos 707: while ((arg = strdelim(&cp)) && *arg != '\0') {
1.33 markus 708: if (options->num_deny_groups >= MAX_DENY_GROUPS)
1.70 millert 709: fatal("%s line %d: too many deny groups.",
1.33 markus 710: filename, linenum);
1.47 ho 711: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
1.25 markus 712: }
1.33 markus 713: break;
714:
715: case sCiphers:
1.48 provos 716: arg = strdelim(&cp);
1.47 ho 717: if (!arg || *arg == '\0')
1.41 markus 718: fatal("%s line %d: Missing argument.", filename, linenum);
1.47 ho 719: if (!ciphers_valid(arg))
1.40 markus 720: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
1.47 ho 721: filename, linenum, arg ? arg : "<NONE>");
1.33 markus 722: if (options->ciphers == NULL)
1.47 ho 723: options->ciphers = xstrdup(arg);
1.66 markus 724: break;
725:
726: case sMacs:
727: arg = strdelim(&cp);
728: if (!arg || *arg == '\0')
729: fatal("%s line %d: Missing argument.", filename, linenum);
730: if (!mac_valid(arg))
731: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
732: filename, linenum, arg ? arg : "<NONE>");
733: if (options->macs == NULL)
734: options->macs = xstrdup(arg);
1.33 markus 735: break;
736:
737: case sProtocol:
738: intptr = &options->protocol;
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: value = proto_spec(arg);
1.33 markus 743: if (value == SSH_PROTO_UNKNOWN)
744: fatal("%s line %d: Bad protocol spec '%s'.",
1.47 ho 745: filename, linenum, arg ? arg : "<NONE>");
1.33 markus 746: if (*intptr == SSH_PROTO_UNKNOWN)
747: *intptr = value;
1.43 jakob 748: break;
749:
750: case sSubsystem:
751: if(options->num_subsystems >= MAX_SUBSYSTEMS) {
752: fatal("%s line %d: too many subsystems defined.",
753: filename, linenum);
754: }
1.48 provos 755: arg = strdelim(&cp);
1.47 ho 756: if (!arg || *arg == '\0')
1.43 jakob 757: fatal("%s line %d: Missing subsystem name.",
758: filename, linenum);
759: for (i = 0; i < options->num_subsystems; i++)
1.47 ho 760: if(strcmp(arg, options->subsystem_name[i]) == 0)
1.43 jakob 761: fatal("%s line %d: Subsystem '%s' already defined.",
1.47 ho 762: filename, linenum, arg);
763: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1.48 provos 764: arg = strdelim(&cp);
1.47 ho 765: if (!arg || *arg == '\0')
1.43 jakob 766: fatal("%s line %d: Missing subsystem command.",
767: filename, linenum);
1.47 ho 768: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.43 jakob 769: options->num_subsystems++;
1.25 markus 770: break;
1.46 markus 771:
772: case sMaxStartups:
1.50 markus 773: arg = strdelim(&cp);
774: if (!arg || *arg == '\0')
775: fatal("%s line %d: Missing MaxStartups spec.",
776: filename, linenum);
777: if (sscanf(arg, "%d:%d:%d",
778: &options->max_startups_begin,
779: &options->max_startups_rate,
780: &options->max_startups) == 3) {
781: if (options->max_startups_begin >
782: options->max_startups ||
783: options->max_startups_rate > 100 ||
784: options->max_startups_rate < 1)
785: fatal("%s line %d: Illegal MaxStartups spec.",
786: filename, linenum);
787: break;
788: }
1.46 markus 789: intptr = &options->max_startups;
790: goto parse_int;
1.25 markus 791:
1.57 markus 792: case sBanner:
793: charptr = &options->banner;
794: goto parse_filename;
1.65 stevesk 795:
1.25 markus 796: default:
797: fprintf(stderr, "%s line %d: Missing handler for opcode %s (%d)\n",
1.47 ho 798: filename, linenum, arg, opcode);
1.25 markus 799: exit(1);
1.13 markus 800: }
1.48 provos 801: if ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1.65 stevesk 802: fprintf(stderr,
1.47 ho 803: "%s line %d: garbage at end of line; \"%.200s\".\n",
804: filename, linenum, arg);
1.25 markus 805: exit(1);
1.13 markus 806: }
1.1 deraadt 807: }
1.25 markus 808: fclose(f);
809: if (bad_options > 0) {
810: fprintf(stderr, "%s: terminating, %d bad configuration options\n",
811: filename, bad_options);
812: exit(1);
1.1 deraadt 813: }
814: }