Annotation of src/usr.bin/ssh/readconf.c, Revision 1.166
1.166 ! grunk 1: /* $OpenBSD: readconf.c,v 1.165 2008/01/19 23:09:49 djm Exp $ */
1.1 deraadt 2: /*
1.18 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Functions for reading the configuration files.
1.26 markus 7: *
1.46 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 13: */
1.1 deraadt 14:
1.147 stevesk 15: #include <sys/types.h>
16: #include <sys/stat.h>
1.152 stevesk 17: #include <sys/socket.h>
18:
19: #include <netinet/in.h>
1.148 stevesk 20:
21: #include <ctype.h>
1.154 stevesk 22: #include <errno.h>
1.155 stevesk 23: #include <netdb.h>
1.159 deraadt 24: #include <signal.h>
1.158 stevesk 25: #include <stdio.h>
1.157 stevesk 26: #include <string.h>
1.156 stevesk 27: #include <unistd.h>
1.1 deraadt 28:
1.159 deraadt 29: #include "xmalloc.h"
1.1 deraadt 30: #include "ssh.h"
1.25 markus 31: #include "compat.h"
1.58 markus 32: #include "cipher.h"
1.55 markus 33: #include "pathnames.h"
1.58 markus 34: #include "log.h"
1.159 deraadt 35: #include "key.h"
1.58 markus 36: #include "readconf.h"
37: #include "match.h"
38: #include "misc.h"
1.159 deraadt 39: #include "buffer.h"
1.62 markus 40: #include "kex.h"
41: #include "mac.h"
1.1 deraadt 42:
43: /* Format of the configuration file:
44:
45: # Configuration data is parsed as follows:
46: # 1. command line options
47: # 2. user-specific file
48: # 3. system-wide file
49: # Any configuration value is only changed the first time it is set.
50: # Thus, host-specific definitions should be at the beginning of the
51: # configuration file, and defaults at the end.
52:
53: # Host-specific declarations. These may override anything above. A single
54: # host may match multiple declarations; these are processed in the order
55: # that they are given in.
56:
57: Host *.ngs.fi ngs.fi
1.96 markus 58: User foo
1.1 deraadt 59:
60: Host fake.com
61: HostName another.host.name.real.org
62: User blaah
63: Port 34289
64: ForwardX11 no
65: ForwardAgent no
66:
67: Host books.com
68: RemoteForward 9999 shadows.cs.hut.fi:9999
69: Cipher 3des
70:
71: Host fascist.blob.com
72: Port 23123
73: User tylonen
74: PasswordAuthentication no
75:
76: Host puukko.hut.fi
77: User t35124p
78: ProxyCommand ssh-proxy %h %p
79:
80: Host *.fr
1.96 markus 81: PublicKeyAuthentication no
1.1 deraadt 82:
83: Host *.su
84: Cipher none
85: PasswordAuthentication no
86:
1.144 reyk 87: Host vpn.fake.com
88: Tunnel yes
89: TunnelDevice 3
90:
1.1 deraadt 91: # Defaults for various options
92: Host *
93: ForwardAgent no
1.50 markus 94: ForwardX11 no
1.1 deraadt 95: PasswordAuthentication yes
96: RSAAuthentication yes
97: RhostsRSAAuthentication yes
98: StrictHostKeyChecking yes
1.126 markus 99: TcpKeepAlive no
1.1 deraadt 100: IdentityFile ~/.ssh/identity
101: Port 22
102: EscapeChar ~
103:
104: */
105:
106: /* Keyword tokens. */
107:
1.17 markus 108: typedef enum {
109: oBadOption,
1.123 markus 110: oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts,
1.153 markus 111: oExitOnForwardFailure,
1.100 deraadt 112: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 113: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 114: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
115: oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
116: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
117: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 118: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 119: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 120: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 121: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 122: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.90 stevesk 123: oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
1.96 markus 124: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 125: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 126: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 127: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.136 djm 128: oSendEnv, oControlPath, oControlMaster, oHashKnownHosts,
1.144 reyk 129: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.110 jakob 130: oDeprecated, oUnsupported
1.1 deraadt 131: } OpCodes;
132:
133: /* Textual representations of the tokens. */
134:
1.17 markus 135: static struct {
136: const char *name;
137: OpCodes opcode;
138: } keywords[] = {
139: { "forwardagent", oForwardAgent },
140: { "forwardx11", oForwardX11 },
1.123 markus 141: { "forwardx11trusted", oForwardX11Trusted },
1.153 markus 142: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 143: { "xauthlocation", oXAuthLocation },
1.17 markus 144: { "gatewayports", oGatewayPorts },
145: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 146: { "rhostsauthentication", oDeprecated },
1.17 markus 147: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 148: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
149: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 150: { "rsaauthentication", oRSAAuthentication },
1.50 markus 151: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 152: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 153: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 154: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 155: { "challengeresponseauthentication", oChallengeResponseAuthentication },
156: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
157: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 158: { "kerberosauthentication", oUnsupported },
159: { "kerberostgtpassing", oUnsupported },
160: { "afstokenpassing", oUnsupported },
1.118 markus 161: #if defined(GSSAPI)
162: { "gssapiauthentication", oGssAuthentication },
163: { "gssapidelegatecredentials", oGssDelegateCreds },
164: #else
165: { "gssapiauthentication", oUnsupported },
166: { "gssapidelegatecredentials", oUnsupported },
167: #endif
1.96 markus 168: { "fallbacktorsh", oDeprecated },
169: { "usersh", oDeprecated },
1.17 markus 170: { "identityfile", oIdentityFile },
1.50 markus 171: { "identityfile2", oIdentityFile }, /* alias */
1.128 markus 172: { "identitiesonly", oIdentitiesOnly },
1.17 markus 173: { "hostname", oHostName },
1.52 markus 174: { "hostkeyalias", oHostKeyAlias },
1.17 markus 175: { "proxycommand", oProxyCommand },
176: { "port", oPort },
177: { "cipher", oCipher },
1.25 markus 178: { "ciphers", oCiphers },
1.62 markus 179: { "macs", oMacs },
1.25 markus 180: { "protocol", oProtocol },
1.17 markus 181: { "remoteforward", oRemoteForward },
182: { "localforward", oLocalForward },
183: { "user", oUser },
184: { "host", oHost },
185: { "escapechar", oEscapeChar },
186: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.81 markus 187: { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */
1.27 markus 188: { "globalknownhostsfile2", oGlobalKnownHostsFile2 },
1.81 markus 189: { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
1.17 markus 190: { "connectionattempts", oConnectionAttempts },
191: { "batchmode", oBatchMode },
192: { "checkhostip", oCheckHostIP },
193: { "stricthostkeychecking", oStrictHostKeyChecking },
194: { "compression", oCompression },
195: { "compressionlevel", oCompressionLevel },
1.126 markus 196: { "tcpkeepalive", oTCPKeepAlive },
197: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 198: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
199: { "loglevel", oLogLevel },
1.71 markus 200: { "dynamicforward", oDynamicForward },
1.67 markus 201: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 202: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 203: { "bindaddress", oBindAddress },
1.110 jakob 204: #ifdef SMARTCARD
1.85 jakob 205: { "smartcarddevice", oSmartcardDevice },
1.110 jakob 206: #else
207: { "smartcarddevice", oUnsupported },
208: #endif
1.93 deraadt 209: { "clearallforwardings", oClearAllForwardings },
1.101 markus 210: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 211: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 212: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 213: { "rekeylimit", oRekeyLimit },
1.111 djm 214: { "connecttimeout", oConnectTimeout },
1.112 djm 215: { "addressfamily", oAddressFamily },
1.127 markus 216: { "serveraliveinterval", oServerAliveInterval },
217: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 218: { "sendenv", oSendEnv },
1.132 djm 219: { "controlpath", oControlPath },
220: { "controlmaster", oControlMaster },
1.136 djm 221: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 222: { "tunnel", oTunnel },
223: { "tunneldevice", oTunnelDevice },
224: { "localcommand", oLocalCommand },
225: { "permitlocalcommand", oPermitLocalCommand },
1.92 stevesk 226: { NULL, oBadOption }
1.13 markus 227: };
228:
1.19 markus 229: /*
230: * Adds a local TCP/IP port forward to options. Never returns if there is an
231: * error.
232: */
1.1 deraadt 233:
1.26 markus 234: void
1.135 djm 235: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 236: {
1.17 markus 237: Forward *fwd;
238: extern uid_t original_real_uid;
1.135 djm 239: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 240: fatal("Privileged ports can only be forwarded by root.");
1.17 markus 241: if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
242: fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
243: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 244:
245: fwd->listen_host = (newfwd->listen_host == NULL) ?
246: NULL : xstrdup(newfwd->listen_host);
247: fwd->listen_port = newfwd->listen_port;
248: fwd->connect_host = xstrdup(newfwd->connect_host);
249: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 250: }
251:
1.19 markus 252: /*
253: * Adds a remote TCP/IP port forward to options. Never returns if there is
254: * an error.
255: */
1.1 deraadt 256:
1.26 markus 257: void
1.135 djm 258: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 259: {
1.17 markus 260: Forward *fwd;
261: if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
262: fatal("Too many remote forwards (max %d).",
1.93 deraadt 263: SSH_MAX_FORWARDS_PER_DIRECTION);
1.17 markus 264: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 265:
266: fwd->listen_host = (newfwd->listen_host == NULL) ?
267: NULL : xstrdup(newfwd->listen_host);
268: fwd->listen_port = newfwd->listen_port;
269: fwd->connect_host = xstrdup(newfwd->connect_host);
270: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 271: }
272:
1.90 stevesk 273: static void
274: clear_forwardings(Options *options)
275: {
276: int i;
277:
1.135 djm 278: for (i = 0; i < options->num_local_forwards; i++) {
1.138 dtucker 279: if (options->local_forwards[i].listen_host != NULL)
280: xfree(options->local_forwards[i].listen_host);
1.135 djm 281: xfree(options->local_forwards[i].connect_host);
282: }
1.90 stevesk 283: options->num_local_forwards = 0;
1.135 djm 284: for (i = 0; i < options->num_remote_forwards; i++) {
1.138 dtucker 285: if (options->remote_forwards[i].listen_host != NULL)
286: xfree(options->remote_forwards[i].listen_host);
1.135 djm 287: xfree(options->remote_forwards[i].connect_host);
288: }
1.90 stevesk 289: options->num_remote_forwards = 0;
1.145 reyk 290: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 291: }
292:
1.19 markus 293: /*
1.70 stevesk 294: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 295: */
1.1 deraadt 296:
1.26 markus 297: static OpCodes
1.17 markus 298: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 299: {
1.51 markus 300: u_int i;
1.1 deraadt 301:
1.17 markus 302: for (i = 0; keywords[i].name; i++)
1.20 markus 303: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 304: return keywords[i].opcode;
305:
1.75 stevesk 306: error("%s: line %d: Bad configuration option: %s",
307: filename, linenum, cp);
1.17 markus 308: return oBadOption;
1.1 deraadt 309: }
310:
1.19 markus 311: /*
312: * Processes a single option line as used in the configuration files. This
313: * only sets those values that have not already been set.
314: */
1.102 markus 315: #define WHITESPACE " \t\r\n"
1.1 deraadt 316:
1.14 markus 317: int
318: process_config_line(Options *options, const char *host,
1.17 markus 319: char *line, const char *filename, int linenum,
320: int *activep)
1.1 deraadt 321: {
1.135 djm 322: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
1.146 djm 323: int opcode, *intptr, value, value2, scale;
1.164 dtucker 324: LogLevel *log_level_ptr;
1.146 djm 325: long long orig, val64;
1.102 markus 326: size_t len;
1.135 djm 327: Forward fwd;
1.106 djm 328:
329: /* Strip trailing whitespace */
1.139 deraadt 330: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 331: if (strchr(WHITESPACE, line[len]) == NULL)
332: break;
333: line[len] = '\0';
334: }
1.1 deraadt 335:
1.42 provos 336: s = line;
337: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 338: if ((keyword = strdelim(&s)) == NULL)
339: return 0;
1.42 provos 340: /* Ignore leading whitespace. */
341: if (*keyword == '\0')
1.43 markus 342: keyword = strdelim(&s);
1.56 deraadt 343: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 344: return 0;
345:
1.38 provos 346: opcode = parse_token(keyword, filename, linenum);
1.17 markus 347:
348: switch (opcode) {
349: case oBadOption:
1.19 markus 350: /* don't panic, but count bad options */
351: return -1;
1.17 markus 352: /* NOTREACHED */
1.111 djm 353: case oConnectTimeout:
354: intptr = &options->connection_timeout;
1.127 markus 355: parse_time:
1.111 djm 356: arg = strdelim(&s);
357: if (!arg || *arg == '\0')
358: fatal("%s line %d: missing time value.",
359: filename, linenum);
360: if ((value = convtime(arg)) == -1)
361: fatal("%s line %d: invalid time value.",
362: filename, linenum);
1.160 dtucker 363: if (*activep && *intptr == -1)
1.111 djm 364: *intptr = value;
365: break;
366:
1.17 markus 367: case oForwardAgent:
368: intptr = &options->forward_agent;
369: parse_flag:
1.42 provos 370: arg = strdelim(&s);
1.40 ho 371: if (!arg || *arg == '\0')
1.17 markus 372: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
373: value = 0; /* To avoid compiler warning... */
1.38 provos 374: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 375: value = 1;
1.38 provos 376: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 377: value = 0;
378: else
379: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
380: if (*activep && *intptr == -1)
381: *intptr = value;
382: break;
383:
384: case oForwardX11:
385: intptr = &options->forward_x11;
386: goto parse_flag;
387:
1.123 markus 388: case oForwardX11Trusted:
389: intptr = &options->forward_x11_trusted;
390: goto parse_flag;
391:
1.17 markus 392: case oGatewayPorts:
393: intptr = &options->gateway_ports;
394: goto parse_flag;
395:
1.153 markus 396: case oExitOnForwardFailure:
397: intptr = &options->exit_on_forward_failure;
398: goto parse_flag;
399:
1.17 markus 400: case oUsePrivilegedPort:
401: intptr = &options->use_privileged_port;
402: goto parse_flag;
403:
404: case oPasswordAuthentication:
405: intptr = &options->password_authentication;
406: goto parse_flag;
407:
1.48 markus 408: case oKbdInteractiveAuthentication:
409: intptr = &options->kbd_interactive_authentication;
410: goto parse_flag;
411:
412: case oKbdInteractiveDevices:
413: charptr = &options->kbd_interactive_devices;
414: goto parse_string;
415:
1.50 markus 416: case oPubkeyAuthentication:
417: intptr = &options->pubkey_authentication;
1.30 markus 418: goto parse_flag;
419:
1.17 markus 420: case oRSAAuthentication:
421: intptr = &options->rsa_authentication;
422: goto parse_flag;
423:
424: case oRhostsRSAAuthentication:
425: intptr = &options->rhosts_rsa_authentication;
426: goto parse_flag;
427:
1.72 markus 428: case oHostbasedAuthentication:
429: intptr = &options->hostbased_authentication;
430: goto parse_flag;
431:
1.59 markus 432: case oChallengeResponseAuthentication:
1.78 markus 433: intptr = &options->challenge_response_authentication;
1.17 markus 434: goto parse_flag;
1.108 jakob 435:
1.118 markus 436: case oGssAuthentication:
437: intptr = &options->gss_authentication;
438: goto parse_flag;
439:
440: case oGssDelegateCreds:
441: intptr = &options->gss_deleg_creds;
442: goto parse_flag;
443:
1.17 markus 444: case oBatchMode:
445: intptr = &options->batch_mode;
446: goto parse_flag;
447:
448: case oCheckHostIP:
449: intptr = &options->check_host_ip;
1.166 ! grunk 450: arg = strdelim(&s);
! 451: if (!arg || *arg == '\0')
! 452: fatal("%.200s line %d: Missing CheckHostIP argument.",
! 453: filename, linenum);
! 454: value = 0; /* To avoid compiler warning... */
! 455: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
! 456: value = SSHCTL_CHECKHOSTIP_YES;
! 457: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
! 458: value = SSHCTL_CHECKHOSTIP_NO;
! 459: else if (strcmp(arg, "fingerprint") == 0)
! 460: value = SSHCTL_CHECKHOSTIP_FPR;
! 461: else
! 462: fatal("%.200s line %d: Bad CheckHostIP argument.",
! 463: filename, linenum);
! 464: if (*activep && *intptr == -1)
! 465: *intptr = value;
! 466: break;
1.17 markus 467:
1.107 jakob 468: case oVerifyHostKeyDNS:
469: intptr = &options->verify_host_key_dns;
1.125 jakob 470: goto parse_yesnoask;
1.107 jakob 471:
1.17 markus 472: case oStrictHostKeyChecking:
473: intptr = &options->strict_host_key_checking;
1.125 jakob 474: parse_yesnoask:
1.42 provos 475: arg = strdelim(&s);
1.40 ho 476: if (!arg || *arg == '\0')
1.60 stevesk 477: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 478: filename, linenum);
1.17 markus 479: value = 0; /* To avoid compiler warning... */
1.38 provos 480: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 481: value = 1;
1.38 provos 482: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 483: value = 0;
1.38 provos 484: else if (strcmp(arg, "ask") == 0)
1.17 markus 485: value = 2;
486: else
487: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
488: if (*activep && *intptr == -1)
489: *intptr = value;
490: break;
491:
492: case oCompression:
493: intptr = &options->compression;
494: goto parse_flag;
495:
1.126 markus 496: case oTCPKeepAlive:
497: intptr = &options->tcp_keep_alive;
1.17 markus 498: goto parse_flag;
499:
1.91 markus 500: case oNoHostAuthenticationForLocalhost:
501: intptr = &options->no_host_authentication_for_localhost;
502: goto parse_flag;
503:
1.17 markus 504: case oNumberOfPasswordPrompts:
505: intptr = &options->number_of_password_prompts;
506: goto parse_int;
507:
508: case oCompressionLevel:
509: intptr = &options->compression_level;
510: goto parse_int;
511:
1.105 markus 512: case oRekeyLimit:
513: arg = strdelim(&s);
514: if (!arg || *arg == '\0')
515: fatal("%.200s line %d: Missing argument.", filename, linenum);
516: if (arg[0] < '0' || arg[0] > '9')
517: fatal("%.200s line %d: Bad number.", filename, linenum);
1.146 djm 518: orig = val64 = strtoll(arg, &endofnumber, 10);
1.105 markus 519: if (arg == endofnumber)
520: fatal("%.200s line %d: Bad number.", filename, linenum);
521: switch (toupper(*endofnumber)) {
1.146 djm 522: case '\0':
523: scale = 1;
524: break;
1.105 markus 525: case 'K':
1.146 djm 526: scale = 1<<10;
1.105 markus 527: break;
528: case 'M':
1.146 djm 529: scale = 1<<20;
1.105 markus 530: break;
531: case 'G':
1.146 djm 532: scale = 1<<30;
1.105 markus 533: break;
1.146 djm 534: default:
535: fatal("%.200s line %d: Invalid RekeyLimit suffix",
536: filename, linenum);
1.105 markus 537: }
1.146 djm 538: val64 *= scale;
539: /* detect integer wrap and too-large limits */
1.165 djm 540: if ((val64 / scale) != orig || val64 > UINT_MAX)
1.146 djm 541: fatal("%.200s line %d: RekeyLimit too large",
542: filename, linenum);
543: if (val64 < 16)
544: fatal("%.200s line %d: RekeyLimit too small",
545: filename, linenum);
1.165 djm 546: if (*activep && options->rekey_limit == -1)
547: options->rekey_limit = (u_int32_t)val64;
1.105 markus 548: break;
549:
1.17 markus 550: case oIdentityFile:
1.42 provos 551: arg = strdelim(&s);
1.40 ho 552: if (!arg || *arg == '\0')
1.17 markus 553: fatal("%.200s line %d: Missing argument.", filename, linenum);
554: if (*activep) {
1.50 markus 555: intptr = &options->num_identity_files;
1.27 markus 556: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 557: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 558: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.161 stevesk 559: charptr = &options->identity_files[*intptr];
1.38 provos 560: *charptr = xstrdup(arg);
1.27 markus 561: *intptr = *intptr + 1;
1.17 markus 562: }
563: break;
564:
1.34 markus 565: case oXAuthLocation:
566: charptr=&options->xauth_location;
567: goto parse_string;
568:
1.17 markus 569: case oUser:
570: charptr = &options->user;
571: parse_string:
1.42 provos 572: arg = strdelim(&s);
1.40 ho 573: if (!arg || *arg == '\0')
1.17 markus 574: fatal("%.200s line %d: Missing argument.", filename, linenum);
575: if (*activep && *charptr == NULL)
1.38 provos 576: *charptr = xstrdup(arg);
1.17 markus 577: break;
578:
579: case oGlobalKnownHostsFile:
580: charptr = &options->system_hostfile;
581: goto parse_string;
582:
583: case oUserKnownHostsFile:
584: charptr = &options->user_hostfile;
585: goto parse_string;
586:
1.27 markus 587: case oGlobalKnownHostsFile2:
588: charptr = &options->system_hostfile2;
589: goto parse_string;
590:
591: case oUserKnownHostsFile2:
592: charptr = &options->user_hostfile2;
593: goto parse_string;
594:
1.17 markus 595: case oHostName:
596: charptr = &options->hostname;
597: goto parse_string;
598:
1.52 markus 599: case oHostKeyAlias:
600: charptr = &options->host_key_alias;
601: goto parse_string;
602:
1.67 markus 603: case oPreferredAuthentications:
604: charptr = &options->preferred_authentications;
605: goto parse_string;
606:
1.77 markus 607: case oBindAddress:
608: charptr = &options->bind_address;
609: goto parse_string;
610:
1.85 jakob 611: case oSmartcardDevice:
1.86 markus 612: charptr = &options->smartcard_device;
613: goto parse_string;
1.85 jakob 614:
1.17 markus 615: case oProxyCommand:
1.144 reyk 616: charptr = &options->proxy_command;
617: parse_command:
1.113 markus 618: if (s == NULL)
619: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 620: len = strspn(s, WHITESPACE "=");
1.17 markus 621: if (*activep && *charptr == NULL)
1.102 markus 622: *charptr = xstrdup(s + len);
1.17 markus 623: return 0;
624:
625: case oPort:
626: intptr = &options->port;
627: parse_int:
1.42 provos 628: arg = strdelim(&s);
1.40 ho 629: if (!arg || *arg == '\0')
1.17 markus 630: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 631: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 632: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 633:
634: /* Octal, decimal, or hex format? */
1.38 provos 635: value = strtol(arg, &endofnumber, 0);
636: if (arg == endofnumber)
1.21 markus 637: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 638: if (*activep && *intptr == -1)
639: *intptr = value;
640: break;
641:
642: case oConnectionAttempts:
643: intptr = &options->connection_attempts;
644: goto parse_int;
645:
646: case oCipher:
647: intptr = &options->cipher;
1.42 provos 648: arg = strdelim(&s);
1.40 ho 649: if (!arg || *arg == '\0')
1.32 markus 650: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 651: value = cipher_number(arg);
1.17 markus 652: if (value == -1)
653: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 654: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 655: if (*activep && *intptr == -1)
656: *intptr = value;
657: break;
658:
1.25 markus 659: case oCiphers:
1.42 provos 660: arg = strdelim(&s);
1.40 ho 661: if (!arg || *arg == '\0')
1.32 markus 662: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 663: if (!ciphers_valid(arg))
1.31 markus 664: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 665: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 666: if (*activep && options->ciphers == NULL)
1.38 provos 667: options->ciphers = xstrdup(arg);
1.25 markus 668: break;
669:
1.62 markus 670: case oMacs:
671: arg = strdelim(&s);
672: if (!arg || *arg == '\0')
673: fatal("%.200s line %d: Missing argument.", filename, linenum);
674: if (!mac_valid(arg))
675: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 676: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 677: if (*activep && options->macs == NULL)
678: options->macs = xstrdup(arg);
679: break;
680:
1.76 markus 681: case oHostKeyAlgorithms:
682: arg = strdelim(&s);
683: if (!arg || *arg == '\0')
684: fatal("%.200s line %d: Missing argument.", filename, linenum);
685: if (!key_names_valid2(arg))
686: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 687: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 688: if (*activep && options->hostkeyalgorithms == NULL)
689: options->hostkeyalgorithms = xstrdup(arg);
690: break;
691:
1.25 markus 692: case oProtocol:
693: intptr = &options->protocol;
1.42 provos 694: arg = strdelim(&s);
1.40 ho 695: if (!arg || *arg == '\0')
1.32 markus 696: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 697: value = proto_spec(arg);
1.25 markus 698: if (value == SSH_PROTO_UNKNOWN)
699: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 700: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 701: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
702: *intptr = value;
703: break;
704:
1.17 markus 705: case oLogLevel:
1.164 dtucker 706: log_level_ptr = &options->log_level;
1.42 provos 707: arg = strdelim(&s);
1.38 provos 708: value = log_level_number(arg);
1.95 markus 709: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 710: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 711: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 712: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
713: *log_level_ptr = (LogLevel) value;
1.17 markus 714: break;
715:
1.88 stevesk 716: case oLocalForward:
1.17 markus 717: case oRemoteForward:
1.42 provos 718: arg = strdelim(&s);
1.135 djm 719: if (arg == NULL || *arg == '\0')
1.88 stevesk 720: fatal("%.200s line %d: Missing port argument.",
721: filename, linenum);
1.135 djm 722: arg2 = strdelim(&s);
723: if (arg2 == NULL || *arg2 == '\0')
724: fatal("%.200s line %d: Missing target argument.",
1.88 stevesk 725: filename, linenum);
1.135 djm 726:
727: /* construct a string for parse_forward */
728: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
729:
730: if (parse_forward(&fwd, fwdarg) == 0)
1.88 stevesk 731: fatal("%.200s line %d: Bad forwarding specification.",
732: filename, linenum);
1.135 djm 733:
1.88 stevesk 734: if (*activep) {
735: if (opcode == oLocalForward)
1.135 djm 736: add_local_forward(options, &fwd);
1.88 stevesk 737: else if (opcode == oRemoteForward)
1.135 djm 738: add_remote_forward(options, &fwd);
1.88 stevesk 739: }
1.17 markus 740: break;
1.71 markus 741:
742: case oDynamicForward:
743: arg = strdelim(&s);
744: if (!arg || *arg == '\0')
745: fatal("%.200s line %d: Missing port argument.",
746: filename, linenum);
1.135 djm 747: memset(&fwd, '\0', sizeof(fwd));
748: fwd.connect_host = "socks";
749: fwd.listen_host = hpdelim(&arg);
750: if (fwd.listen_host == NULL ||
751: strlen(fwd.listen_host) >= NI_MAXHOST)
752: fatal("%.200s line %d: Bad forwarding specification.",
753: filename, linenum);
754: if (arg) {
755: fwd.listen_port = a2port(arg);
756: fwd.listen_host = cleanhostname(fwd.listen_host);
757: } else {
758: fwd.listen_port = a2port(fwd.listen_host);
1.143 djm 759: fwd.listen_host = NULL;
1.135 djm 760: }
761: if (fwd.listen_port == 0)
1.71 markus 762: fatal("%.200s line %d: Badly formatted port number.",
763: filename, linenum);
1.87 markus 764: if (*activep)
1.135 djm 765: add_local_forward(options, &fwd);
1.72 markus 766: break;
1.17 markus 767:
1.90 stevesk 768: case oClearAllForwardings:
769: intptr = &options->clear_forwardings;
770: goto parse_flag;
771:
1.17 markus 772: case oHost:
773: *activep = 0;
1.42 provos 774: while ((arg = strdelim(&s)) != NULL && *arg != '\0')
1.38 provos 775: if (match_pattern(host, arg)) {
776: debug("Applying options for %.100s", arg);
1.17 markus 777: *activep = 1;
778: break;
779: }
1.42 provos 780: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 781: return 0;
782:
783: case oEscapeChar:
784: intptr = &options->escape_char;
1.42 provos 785: arg = strdelim(&s);
1.40 ho 786: if (!arg || *arg == '\0')
1.17 markus 787: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 788: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 789: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
790: value = (u_char) arg[1] & 31;
1.38 provos 791: else if (strlen(arg) == 1)
1.51 markus 792: value = (u_char) arg[0];
1.38 provos 793: else if (strcmp(arg, "none") == 0)
1.79 stevesk 794: value = SSH_ESCAPECHAR_NONE;
1.17 markus 795: else {
796: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 797: filename, linenum);
1.17 markus 798: /* NOTREACHED */
799: value = 0; /* Avoid compiler warning. */
800: }
801: if (*activep && *intptr == -1)
802: *intptr = value;
1.112 djm 803: break;
804:
805: case oAddressFamily:
806: arg = strdelim(&s);
1.140 markus 807: if (!arg || *arg == '\0')
808: fatal("%s line %d: missing address family.",
809: filename, linenum);
1.114 djm 810: intptr = &options->address_family;
1.112 djm 811: if (strcasecmp(arg, "inet") == 0)
1.114 djm 812: value = AF_INET;
1.112 djm 813: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 814: value = AF_INET6;
1.112 djm 815: else if (strcasecmp(arg, "any") == 0)
1.114 djm 816: value = AF_UNSPEC;
1.112 djm 817: else
818: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 819: if (*activep && *intptr == -1)
820: *intptr = value;
1.17 markus 821: break;
822:
1.101 markus 823: case oEnableSSHKeysign:
824: intptr = &options->enable_ssh_keysign;
825: goto parse_flag;
826:
1.128 markus 827: case oIdentitiesOnly:
828: intptr = &options->identities_only;
829: goto parse_flag;
830:
1.127 markus 831: case oServerAliveInterval:
832: intptr = &options->server_alive_interval;
833: goto parse_time;
834:
835: case oServerAliveCountMax:
836: intptr = &options->server_alive_count_max;
837: goto parse_int;
838:
1.130 djm 839: case oSendEnv:
840: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
841: if (strchr(arg, '=') != NULL)
842: fatal("%s line %d: Invalid environment name.",
843: filename, linenum);
1.137 djm 844: if (!*activep)
845: continue;
1.130 djm 846: if (options->num_send_env >= MAX_SEND_ENV)
847: fatal("%s line %d: too many send env.",
848: filename, linenum);
849: options->send_env[options->num_send_env++] =
850: xstrdup(arg);
851: }
852: break;
853:
1.132 djm 854: case oControlPath:
855: charptr = &options->control_path;
856: goto parse_string;
857:
858: case oControlMaster:
859: intptr = &options->control_master;
1.141 djm 860: arg = strdelim(&s);
861: if (!arg || *arg == '\0')
862: fatal("%.200s line %d: Missing ControlMaster argument.",
863: filename, linenum);
864: value = 0; /* To avoid compiler warning... */
865: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
866: value = SSHCTL_MASTER_YES;
867: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
868: value = SSHCTL_MASTER_NO;
869: else if (strcmp(arg, "auto") == 0)
870: value = SSHCTL_MASTER_AUTO;
871: else if (strcmp(arg, "ask") == 0)
872: value = SSHCTL_MASTER_ASK;
873: else if (strcmp(arg, "autoask") == 0)
874: value = SSHCTL_MASTER_AUTO_ASK;
875: else
876: fatal("%.200s line %d: Bad ControlMaster argument.",
877: filename, linenum);
878: if (*activep && *intptr == -1)
879: *intptr = value;
880: break;
1.132 djm 881:
1.136 djm 882: case oHashKnownHosts:
883: intptr = &options->hash_known_hosts;
884: goto parse_flag;
885:
1.144 reyk 886: case oTunnel:
887: intptr = &options->tun_open;
1.145 reyk 888: arg = strdelim(&s);
889: if (!arg || *arg == '\0')
890: fatal("%s line %d: Missing yes/point-to-point/"
891: "ethernet/no argument.", filename, linenum);
892: value = 0; /* silence compiler */
893: if (strcasecmp(arg, "ethernet") == 0)
894: value = SSH_TUNMODE_ETHERNET;
895: else if (strcasecmp(arg, "point-to-point") == 0)
896: value = SSH_TUNMODE_POINTOPOINT;
897: else if (strcasecmp(arg, "yes") == 0)
898: value = SSH_TUNMODE_DEFAULT;
899: else if (strcasecmp(arg, "no") == 0)
900: value = SSH_TUNMODE_NO;
901: else
902: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
903: "no argument: %s", filename, linenum, arg);
904: if (*activep)
905: *intptr = value;
906: break;
1.144 reyk 907:
908: case oTunnelDevice:
909: arg = strdelim(&s);
910: if (!arg || *arg == '\0')
911: fatal("%.200s line %d: Missing argument.", filename, linenum);
912: value = a2tun(arg, &value2);
1.145 reyk 913: if (value == SSH_TUNID_ERR)
1.144 reyk 914: fatal("%.200s line %d: Bad tun device.", filename, linenum);
915: if (*activep) {
916: options->tun_local = value;
917: options->tun_remote = value2;
918: }
919: break;
920:
921: case oLocalCommand:
922: charptr = &options->local_command;
923: goto parse_command;
924:
925: case oPermitLocalCommand:
926: intptr = &options->permit_local_command;
927: goto parse_flag;
928:
1.96 markus 929: case oDeprecated:
1.98 markus 930: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 931: filename, linenum, keyword);
1.98 markus 932: return 0;
1.96 markus 933:
1.110 jakob 934: case oUnsupported:
935: error("%s line %d: Unsupported option \"%s\"",
936: filename, linenum, keyword);
937: return 0;
938:
1.17 markus 939: default:
940: fatal("process_config_line: Unimplemented opcode %d", opcode);
941: }
942:
943: /* Check that there is no garbage at end of line. */
1.57 djm 944: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 945: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 946: filename, linenum, arg);
1.39 ho 947: }
1.17 markus 948: return 0;
1.1 deraadt 949: }
950:
951:
1.19 markus 952: /*
953: * Reads the config file and modifies the options accordingly. Options
954: * should already be initialized before this call. This never returns if
1.89 stevesk 955: * there is an error. If the file does not exist, this returns 0.
1.19 markus 956: */
1.1 deraadt 957:
1.89 stevesk 958: int
1.134 deraadt 959: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 960: int checkperm)
1.1 deraadt 961: {
1.17 markus 962: FILE *f;
963: char line[1024];
964: int active, linenum;
965: int bad_options = 0;
966:
967: /* Open the file. */
1.129 djm 968: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 969: return 0;
1.129 djm 970:
971: if (checkperm) {
972: struct stat sb;
1.134 deraadt 973:
1.131 dtucker 974: if (fstat(fileno(f), &sb) == -1)
1.129 djm 975: fatal("fstat %s: %s", filename, strerror(errno));
976: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 977: (sb.st_mode & 022) != 0))
1.129 djm 978: fatal("Bad owner or permissions on %s", filename);
979: }
1.17 markus 980:
981: debug("Reading configuration data %.200s", filename);
982:
1.19 markus 983: /*
984: * Mark that we are now processing the options. This flag is turned
985: * on/off by Host specifications.
986: */
1.17 markus 987: active = 1;
988: linenum = 0;
989: while (fgets(line, sizeof(line), f)) {
990: /* Update line number counter. */
991: linenum++;
992: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
993: bad_options++;
994: }
995: fclose(f);
996: if (bad_options > 0)
1.64 millert 997: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 998: filename, bad_options);
1.89 stevesk 999: return 1;
1.1 deraadt 1000: }
1001:
1.19 markus 1002: /*
1003: * Initializes options to special values that indicate that they have not yet
1004: * been set. Read_config_file will only set options with this value. Options
1005: * are processed in the following order: command line, user config file,
1006: * system config file. Last, fill_default_options is called.
1007: */
1.1 deraadt 1008:
1.26 markus 1009: void
1.17 markus 1010: initialize_options(Options * options)
1.1 deraadt 1011: {
1.17 markus 1012: memset(options, 'X', sizeof(*options));
1013: options->forward_agent = -1;
1014: options->forward_x11 = -1;
1.123 markus 1015: options->forward_x11_trusted = -1;
1.153 markus 1016: options->exit_on_forward_failure = -1;
1.34 markus 1017: options->xauth_location = NULL;
1.17 markus 1018: options->gateway_ports = -1;
1019: options->use_privileged_port = -1;
1020: options->rsa_authentication = -1;
1.50 markus 1021: options->pubkey_authentication = -1;
1.78 markus 1022: options->challenge_response_authentication = -1;
1.118 markus 1023: options->gss_authentication = -1;
1024: options->gss_deleg_creds = -1;
1.17 markus 1025: options->password_authentication = -1;
1.48 markus 1026: options->kbd_interactive_authentication = -1;
1027: options->kbd_interactive_devices = NULL;
1.17 markus 1028: options->rhosts_rsa_authentication = -1;
1.72 markus 1029: options->hostbased_authentication = -1;
1.17 markus 1030: options->batch_mode = -1;
1031: options->check_host_ip = -1;
1032: options->strict_host_key_checking = -1;
1033: options->compression = -1;
1.126 markus 1034: options->tcp_keep_alive = -1;
1.17 markus 1035: options->compression_level = -1;
1036: options->port = -1;
1.114 djm 1037: options->address_family = -1;
1.17 markus 1038: options->connection_attempts = -1;
1.111 djm 1039: options->connection_timeout = -1;
1.17 markus 1040: options->number_of_password_prompts = -1;
1041: options->cipher = -1;
1.25 markus 1042: options->ciphers = NULL;
1.62 markus 1043: options->macs = NULL;
1.76 markus 1044: options->hostkeyalgorithms = NULL;
1.25 markus 1045: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1046: options->num_identity_files = 0;
1047: options->hostname = NULL;
1.52 markus 1048: options->host_key_alias = NULL;
1.17 markus 1049: options->proxy_command = NULL;
1050: options->user = NULL;
1051: options->escape_char = -1;
1052: options->system_hostfile = NULL;
1053: options->user_hostfile = NULL;
1.27 markus 1054: options->system_hostfile2 = NULL;
1055: options->user_hostfile2 = NULL;
1.17 markus 1056: options->num_local_forwards = 0;
1057: options->num_remote_forwards = 0;
1.90 stevesk 1058: options->clear_forwardings = -1;
1.95 markus 1059: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1060: options->preferred_authentications = NULL;
1.77 markus 1061: options->bind_address = NULL;
1.86 markus 1062: options->smartcard_device = NULL;
1.101 markus 1063: options->enable_ssh_keysign = - 1;
1.91 markus 1064: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1065: options->identities_only = - 1;
1.105 markus 1066: options->rekey_limit = - 1;
1.107 jakob 1067: options->verify_host_key_dns = -1;
1.127 markus 1068: options->server_alive_interval = -1;
1069: options->server_alive_count_max = -1;
1.130 djm 1070: options->num_send_env = 0;
1.132 djm 1071: options->control_path = NULL;
1072: options->control_master = -1;
1.136 djm 1073: options->hash_known_hosts = -1;
1.144 reyk 1074: options->tun_open = -1;
1075: options->tun_local = -1;
1076: options->tun_remote = -1;
1077: options->local_command = NULL;
1078: options->permit_local_command = -1;
1.1 deraadt 1079: }
1080:
1.19 markus 1081: /*
1082: * Called after processing other sources of option data, this fills those
1083: * options for which no value has been specified with their default values.
1084: */
1.1 deraadt 1085:
1.26 markus 1086: void
1.17 markus 1087: fill_default_options(Options * options)
1.1 deraadt 1088: {
1.61 deraadt 1089: int len;
1090:
1.17 markus 1091: if (options->forward_agent == -1)
1.33 markus 1092: options->forward_agent = 0;
1.17 markus 1093: if (options->forward_x11 == -1)
1.23 markus 1094: options->forward_x11 = 0;
1.123 markus 1095: if (options->forward_x11_trusted == -1)
1096: options->forward_x11_trusted = 0;
1.153 markus 1097: if (options->exit_on_forward_failure == -1)
1098: options->exit_on_forward_failure = 0;
1.34 markus 1099: if (options->xauth_location == NULL)
1.80 markus 1100: options->xauth_location = _PATH_XAUTH;
1.17 markus 1101: if (options->gateway_ports == -1)
1102: options->gateway_ports = 0;
1103: if (options->use_privileged_port == -1)
1.65 markus 1104: options->use_privileged_port = 0;
1.17 markus 1105: if (options->rsa_authentication == -1)
1106: options->rsa_authentication = 1;
1.50 markus 1107: if (options->pubkey_authentication == -1)
1108: options->pubkey_authentication = 1;
1.78 markus 1109: if (options->challenge_response_authentication == -1)
1.83 markus 1110: options->challenge_response_authentication = 1;
1.118 markus 1111: if (options->gss_authentication == -1)
1.122 markus 1112: options->gss_authentication = 0;
1.118 markus 1113: if (options->gss_deleg_creds == -1)
1114: options->gss_deleg_creds = 0;
1.17 markus 1115: if (options->password_authentication == -1)
1116: options->password_authentication = 1;
1.48 markus 1117: if (options->kbd_interactive_authentication == -1)
1.59 markus 1118: options->kbd_interactive_authentication = 1;
1.17 markus 1119: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1120: options->rhosts_rsa_authentication = 0;
1.72 markus 1121: if (options->hostbased_authentication == -1)
1122: options->hostbased_authentication = 0;
1.17 markus 1123: if (options->batch_mode == -1)
1124: options->batch_mode = 0;
1125: if (options->check_host_ip == -1)
1126: options->check_host_ip = 1;
1127: if (options->strict_host_key_checking == -1)
1128: options->strict_host_key_checking = 2; /* 2 is default */
1129: if (options->compression == -1)
1130: options->compression = 0;
1.126 markus 1131: if (options->tcp_keep_alive == -1)
1132: options->tcp_keep_alive = 1;
1.17 markus 1133: if (options->compression_level == -1)
1134: options->compression_level = 6;
1135: if (options->port == -1)
1136: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1137: if (options->address_family == -1)
1138: options->address_family = AF_UNSPEC;
1.17 markus 1139: if (options->connection_attempts == -1)
1.84 markus 1140: options->connection_attempts = 1;
1.17 markus 1141: if (options->number_of_password_prompts == -1)
1142: options->number_of_password_prompts = 3;
1143: /* Selected in ssh_login(). */
1144: if (options->cipher == -1)
1145: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1146: /* options->ciphers, default set in myproposals.h */
1.62 markus 1147: /* options->macs, default set in myproposals.h */
1.76 markus 1148: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1149: if (options->protocol == SSH_PROTO_UNKNOWN)
1.69 markus 1150: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
1.17 markus 1151: if (options->num_identity_files == 0) {
1.50 markus 1152: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1153: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1154: options->identity_files[options->num_identity_files] =
1.61 deraadt 1155: xmalloc(len);
1156: snprintf(options->identity_files[options->num_identity_files++],
1157: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1158: }
1159: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1160: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1161: options->identity_files[options->num_identity_files] =
1162: xmalloc(len);
1163: snprintf(options->identity_files[options->num_identity_files++],
1164: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1165:
1.61 deraadt 1166: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1167: options->identity_files[options->num_identity_files] =
1.61 deraadt 1168: xmalloc(len);
1169: snprintf(options->identity_files[options->num_identity_files++],
1170: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.50 markus 1171: }
1.27 markus 1172: }
1.17 markus 1173: if (options->escape_char == -1)
1174: options->escape_char = '~';
1175: if (options->system_hostfile == NULL)
1.55 markus 1176: options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
1.17 markus 1177: if (options->user_hostfile == NULL)
1.55 markus 1178: options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
1.27 markus 1179: if (options->system_hostfile2 == NULL)
1.55 markus 1180: options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
1.27 markus 1181: if (options->user_hostfile2 == NULL)
1.55 markus 1182: options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
1.95 markus 1183: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1184: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1185: if (options->clear_forwardings == 1)
1186: clear_forwardings(options);
1.91 markus 1187: if (options->no_host_authentication_for_localhost == - 1)
1188: options->no_host_authentication_for_localhost = 0;
1.128 markus 1189: if (options->identities_only == -1)
1190: options->identities_only = 0;
1.101 markus 1191: if (options->enable_ssh_keysign == -1)
1192: options->enable_ssh_keysign = 0;
1.105 markus 1193: if (options->rekey_limit == -1)
1194: options->rekey_limit = 0;
1.107 jakob 1195: if (options->verify_host_key_dns == -1)
1196: options->verify_host_key_dns = 0;
1.127 markus 1197: if (options->server_alive_interval == -1)
1198: options->server_alive_interval = 0;
1199: if (options->server_alive_count_max == -1)
1200: options->server_alive_count_max = 3;
1.132 djm 1201: if (options->control_master == -1)
1202: options->control_master = 0;
1.136 djm 1203: if (options->hash_known_hosts == -1)
1204: options->hash_known_hosts = 0;
1.144 reyk 1205: if (options->tun_open == -1)
1.145 reyk 1206: options->tun_open = SSH_TUNMODE_NO;
1207: if (options->tun_local == -1)
1208: options->tun_local = SSH_TUNID_ANY;
1209: if (options->tun_remote == -1)
1210: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1211: if (options->permit_local_command == -1)
1212: options->permit_local_command = 0;
1213: /* options->local_command should not be set by default */
1.17 markus 1214: /* options->proxy_command should not be set by default */
1215: /* options->user will be set in the main program if appropriate */
1216: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1217: /* options->host_key_alias should not be set by default */
1.67 markus 1218: /* options->preferred_authentications will be set in ssh */
1.135 djm 1219: }
1220:
1221: /*
1222: * parse_forward
1223: * parses a string containing a port forwarding specification of the form:
1224: * [listenhost:]listenport:connecthost:connectport
1225: * returns number of arguments parsed or zero on error
1226: */
1227: int
1228: parse_forward(Forward *fwd, const char *fwdspec)
1229: {
1230: int i;
1231: char *p, *cp, *fwdarg[4];
1232:
1233: memset(fwd, '\0', sizeof(*fwd));
1234:
1235: cp = p = xstrdup(fwdspec);
1236:
1237: /* skip leading spaces */
1.162 tedu 1238: while (isspace(*cp))
1.135 djm 1239: cp++;
1240:
1241: for (i = 0; i < 4; ++i)
1242: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1243: break;
1244:
1245: /* Check for trailing garbage in 4-arg case*/
1246: if (cp != NULL)
1247: i = 0; /* failure */
1248:
1249: switch (i) {
1250: case 3:
1251: fwd->listen_host = NULL;
1252: fwd->listen_port = a2port(fwdarg[0]);
1253: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1254: fwd->connect_port = a2port(fwdarg[2]);
1255: break;
1256:
1257: case 4:
1258: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1259: fwd->listen_port = a2port(fwdarg[1]);
1260: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1261: fwd->connect_port = a2port(fwdarg[3]);
1262: break;
1263: default:
1264: i = 0; /* failure */
1265: }
1266:
1267: xfree(p);
1268:
1.163 markus 1269: if (fwd->listen_port == 0 || fwd->connect_port == 0)
1.135 djm 1270: goto fail_free;
1271:
1272: if (fwd->connect_host != NULL &&
1273: strlen(fwd->connect_host) >= NI_MAXHOST)
1274: goto fail_free;
1275:
1276: return (i);
1277:
1278: fail_free:
1279: if (fwd->connect_host != NULL)
1280: xfree(fwd->connect_host);
1281: if (fwd->listen_host != NULL)
1282: xfree(fwd->listen_host);
1283: return (0);
1.1 deraadt 1284: }
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