Annotation of src/usr.bin/ssh/readconf.c, Revision 1.156
1.156 ! stevesk 1: /* $OpenBSD: readconf.c,v 1.155 2006/07/12 22:28:52 stevesk 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:
15: #include "includes.h"
1.147 stevesk 16:
17: #include <sys/types.h>
18: #include <sys/stat.h>
1.152 stevesk 19: #include <sys/socket.h>
20:
21: #include <netinet/in.h>
1.148 stevesk 22:
23: #include <ctype.h>
1.154 stevesk 24: #include <errno.h>
1.155 stevesk 25: #include <netdb.h>
1.156 ! stevesk 26: #include <unistd.h>
1.1 deraadt 27:
28: #include "ssh.h"
29: #include "xmalloc.h"
1.25 markus 30: #include "compat.h"
1.58 markus 31: #include "cipher.h"
1.55 markus 32: #include "pathnames.h"
1.58 markus 33: #include "log.h"
34: #include "readconf.h"
35: #include "match.h"
36: #include "misc.h"
1.62 markus 37: #include "kex.h"
38: #include "mac.h"
1.1 deraadt 39:
40: /* Format of the configuration file:
41:
42: # Configuration data is parsed as follows:
43: # 1. command line options
44: # 2. user-specific file
45: # 3. system-wide file
46: # Any configuration value is only changed the first time it is set.
47: # Thus, host-specific definitions should be at the beginning of the
48: # configuration file, and defaults at the end.
49:
50: # Host-specific declarations. These may override anything above. A single
51: # host may match multiple declarations; these are processed in the order
52: # that they are given in.
53:
54: Host *.ngs.fi ngs.fi
1.96 markus 55: User foo
1.1 deraadt 56:
57: Host fake.com
58: HostName another.host.name.real.org
59: User blaah
60: Port 34289
61: ForwardX11 no
62: ForwardAgent no
63:
64: Host books.com
65: RemoteForward 9999 shadows.cs.hut.fi:9999
66: Cipher 3des
67:
68: Host fascist.blob.com
69: Port 23123
70: User tylonen
71: PasswordAuthentication no
72:
73: Host puukko.hut.fi
74: User t35124p
75: ProxyCommand ssh-proxy %h %p
76:
77: Host *.fr
1.96 markus 78: PublicKeyAuthentication no
1.1 deraadt 79:
80: Host *.su
81: Cipher none
82: PasswordAuthentication no
83:
1.144 reyk 84: Host vpn.fake.com
85: Tunnel yes
86: TunnelDevice 3
87:
1.1 deraadt 88: # Defaults for various options
89: Host *
90: ForwardAgent no
1.50 markus 91: ForwardX11 no
1.1 deraadt 92: PasswordAuthentication yes
93: RSAAuthentication yes
94: RhostsRSAAuthentication yes
95: StrictHostKeyChecking yes
1.126 markus 96: TcpKeepAlive no
1.1 deraadt 97: IdentityFile ~/.ssh/identity
98: Port 22
99: EscapeChar ~
100:
101: */
102:
103: /* Keyword tokens. */
104:
1.17 markus 105: typedef enum {
106: oBadOption,
1.123 markus 107: oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts,
1.153 markus 108: oExitOnForwardFailure,
1.100 deraadt 109: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 110: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 111: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
112: oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
113: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
114: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 115: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 116: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 117: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 118: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 119: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.90 stevesk 120: oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
1.96 markus 121: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 122: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 123: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 124: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.136 djm 125: oSendEnv, oControlPath, oControlMaster, oHashKnownHosts,
1.144 reyk 126: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.110 jakob 127: oDeprecated, oUnsupported
1.1 deraadt 128: } OpCodes;
129:
130: /* Textual representations of the tokens. */
131:
1.17 markus 132: static struct {
133: const char *name;
134: OpCodes opcode;
135: } keywords[] = {
136: { "forwardagent", oForwardAgent },
137: { "forwardx11", oForwardX11 },
1.123 markus 138: { "forwardx11trusted", oForwardX11Trusted },
1.153 markus 139: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 140: { "xauthlocation", oXAuthLocation },
1.17 markus 141: { "gatewayports", oGatewayPorts },
142: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 143: { "rhostsauthentication", oDeprecated },
1.17 markus 144: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 145: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
146: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 147: { "rsaauthentication", oRSAAuthentication },
1.50 markus 148: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 149: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 150: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 151: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 152: { "challengeresponseauthentication", oChallengeResponseAuthentication },
153: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
154: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 155: { "kerberosauthentication", oUnsupported },
156: { "kerberostgtpassing", oUnsupported },
157: { "afstokenpassing", oUnsupported },
1.118 markus 158: #if defined(GSSAPI)
159: { "gssapiauthentication", oGssAuthentication },
160: { "gssapidelegatecredentials", oGssDelegateCreds },
161: #else
162: { "gssapiauthentication", oUnsupported },
163: { "gssapidelegatecredentials", oUnsupported },
164: #endif
1.96 markus 165: { "fallbacktorsh", oDeprecated },
166: { "usersh", oDeprecated },
1.17 markus 167: { "identityfile", oIdentityFile },
1.50 markus 168: { "identityfile2", oIdentityFile }, /* alias */
1.128 markus 169: { "identitiesonly", oIdentitiesOnly },
1.17 markus 170: { "hostname", oHostName },
1.52 markus 171: { "hostkeyalias", oHostKeyAlias },
1.17 markus 172: { "proxycommand", oProxyCommand },
173: { "port", oPort },
174: { "cipher", oCipher },
1.25 markus 175: { "ciphers", oCiphers },
1.62 markus 176: { "macs", oMacs },
1.25 markus 177: { "protocol", oProtocol },
1.17 markus 178: { "remoteforward", oRemoteForward },
179: { "localforward", oLocalForward },
180: { "user", oUser },
181: { "host", oHost },
182: { "escapechar", oEscapeChar },
183: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.81 markus 184: { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */
1.27 markus 185: { "globalknownhostsfile2", oGlobalKnownHostsFile2 },
1.81 markus 186: { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
1.17 markus 187: { "connectionattempts", oConnectionAttempts },
188: { "batchmode", oBatchMode },
189: { "checkhostip", oCheckHostIP },
190: { "stricthostkeychecking", oStrictHostKeyChecking },
191: { "compression", oCompression },
192: { "compressionlevel", oCompressionLevel },
1.126 markus 193: { "tcpkeepalive", oTCPKeepAlive },
194: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 195: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
196: { "loglevel", oLogLevel },
1.71 markus 197: { "dynamicforward", oDynamicForward },
1.67 markus 198: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 199: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 200: { "bindaddress", oBindAddress },
1.110 jakob 201: #ifdef SMARTCARD
1.85 jakob 202: { "smartcarddevice", oSmartcardDevice },
1.110 jakob 203: #else
204: { "smartcarddevice", oUnsupported },
205: #endif
1.93 deraadt 206: { "clearallforwardings", oClearAllForwardings },
1.101 markus 207: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 208: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 209: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 210: { "rekeylimit", oRekeyLimit },
1.111 djm 211: { "connecttimeout", oConnectTimeout },
1.112 djm 212: { "addressfamily", oAddressFamily },
1.127 markus 213: { "serveraliveinterval", oServerAliveInterval },
214: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 215: { "sendenv", oSendEnv },
1.132 djm 216: { "controlpath", oControlPath },
217: { "controlmaster", oControlMaster },
1.136 djm 218: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 219: { "tunnel", oTunnel },
220: { "tunneldevice", oTunnelDevice },
221: { "localcommand", oLocalCommand },
222: { "permitlocalcommand", oPermitLocalCommand },
1.92 stevesk 223: { NULL, oBadOption }
1.13 markus 224: };
225:
1.19 markus 226: /*
227: * Adds a local TCP/IP port forward to options. Never returns if there is an
228: * error.
229: */
1.1 deraadt 230:
1.26 markus 231: void
1.135 djm 232: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 233: {
1.17 markus 234: Forward *fwd;
235: extern uid_t original_real_uid;
1.135 djm 236: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 237: fatal("Privileged ports can only be forwarded by root.");
1.17 markus 238: if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
239: fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
240: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 241:
242: fwd->listen_host = (newfwd->listen_host == NULL) ?
243: NULL : xstrdup(newfwd->listen_host);
244: fwd->listen_port = newfwd->listen_port;
245: fwd->connect_host = xstrdup(newfwd->connect_host);
246: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 247: }
248:
1.19 markus 249: /*
250: * Adds a remote TCP/IP port forward to options. Never returns if there is
251: * an error.
252: */
1.1 deraadt 253:
1.26 markus 254: void
1.135 djm 255: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 256: {
1.17 markus 257: Forward *fwd;
258: if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
259: fatal("Too many remote forwards (max %d).",
1.93 deraadt 260: SSH_MAX_FORWARDS_PER_DIRECTION);
1.17 markus 261: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 262:
263: fwd->listen_host = (newfwd->listen_host == NULL) ?
264: NULL : xstrdup(newfwd->listen_host);
265: fwd->listen_port = newfwd->listen_port;
266: fwd->connect_host = xstrdup(newfwd->connect_host);
267: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 268: }
269:
1.90 stevesk 270: static void
271: clear_forwardings(Options *options)
272: {
273: int i;
274:
1.135 djm 275: for (i = 0; i < options->num_local_forwards; i++) {
1.138 dtucker 276: if (options->local_forwards[i].listen_host != NULL)
277: xfree(options->local_forwards[i].listen_host);
1.135 djm 278: xfree(options->local_forwards[i].connect_host);
279: }
1.90 stevesk 280: options->num_local_forwards = 0;
1.135 djm 281: for (i = 0; i < options->num_remote_forwards; i++) {
1.138 dtucker 282: if (options->remote_forwards[i].listen_host != NULL)
283: xfree(options->remote_forwards[i].listen_host);
1.135 djm 284: xfree(options->remote_forwards[i].connect_host);
285: }
1.90 stevesk 286: options->num_remote_forwards = 0;
1.145 reyk 287: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 288: }
289:
1.19 markus 290: /*
1.70 stevesk 291: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 292: */
1.1 deraadt 293:
1.26 markus 294: static OpCodes
1.17 markus 295: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 296: {
1.51 markus 297: u_int i;
1.1 deraadt 298:
1.17 markus 299: for (i = 0; keywords[i].name; i++)
1.20 markus 300: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 301: return keywords[i].opcode;
302:
1.75 stevesk 303: error("%s: line %d: Bad configuration option: %s",
304: filename, linenum, cp);
1.17 markus 305: return oBadOption;
1.1 deraadt 306: }
307:
1.19 markus 308: /*
309: * Processes a single option line as used in the configuration files. This
310: * only sets those values that have not already been set.
311: */
1.102 markus 312: #define WHITESPACE " \t\r\n"
1.1 deraadt 313:
1.14 markus 314: int
315: process_config_line(Options *options, const char *host,
1.17 markus 316: char *line, const char *filename, int linenum,
317: int *activep)
1.1 deraadt 318: {
1.135 djm 319: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
1.146 djm 320: int opcode, *intptr, value, value2, scale;
321: long long orig, val64;
1.102 markus 322: size_t len;
1.135 djm 323: Forward fwd;
1.106 djm 324:
325: /* Strip trailing whitespace */
1.139 deraadt 326: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 327: if (strchr(WHITESPACE, line[len]) == NULL)
328: break;
329: line[len] = '\0';
330: }
1.1 deraadt 331:
1.42 provos 332: s = line;
333: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 334: if ((keyword = strdelim(&s)) == NULL)
335: return 0;
1.42 provos 336: /* Ignore leading whitespace. */
337: if (*keyword == '\0')
1.43 markus 338: keyword = strdelim(&s);
1.56 deraadt 339: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 340: return 0;
341:
1.38 provos 342: opcode = parse_token(keyword, filename, linenum);
1.17 markus 343:
344: switch (opcode) {
345: case oBadOption:
1.19 markus 346: /* don't panic, but count bad options */
347: return -1;
1.17 markus 348: /* NOTREACHED */
1.111 djm 349: case oConnectTimeout:
350: intptr = &options->connection_timeout;
1.127 markus 351: parse_time:
1.111 djm 352: arg = strdelim(&s);
353: if (!arg || *arg == '\0')
354: fatal("%s line %d: missing time value.",
355: filename, linenum);
356: if ((value = convtime(arg)) == -1)
357: fatal("%s line %d: invalid time value.",
358: filename, linenum);
359: if (*intptr == -1)
360: *intptr = value;
361: break;
362:
1.17 markus 363: case oForwardAgent:
364: intptr = &options->forward_agent;
365: parse_flag:
1.42 provos 366: arg = strdelim(&s);
1.40 ho 367: if (!arg || *arg == '\0')
1.17 markus 368: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
369: value = 0; /* To avoid compiler warning... */
1.38 provos 370: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 371: value = 1;
1.38 provos 372: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 373: value = 0;
374: else
375: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
376: if (*activep && *intptr == -1)
377: *intptr = value;
378: break;
379:
380: case oForwardX11:
381: intptr = &options->forward_x11;
382: goto parse_flag;
383:
1.123 markus 384: case oForwardX11Trusted:
385: intptr = &options->forward_x11_trusted;
386: goto parse_flag;
387:
1.17 markus 388: case oGatewayPorts:
389: intptr = &options->gateway_ports;
390: goto parse_flag;
391:
1.153 markus 392: case oExitOnForwardFailure:
393: intptr = &options->exit_on_forward_failure;
394: goto parse_flag;
395:
1.17 markus 396: case oUsePrivilegedPort:
397: intptr = &options->use_privileged_port;
398: goto parse_flag;
399:
400: case oPasswordAuthentication:
401: intptr = &options->password_authentication;
402: goto parse_flag;
403:
1.48 markus 404: case oKbdInteractiveAuthentication:
405: intptr = &options->kbd_interactive_authentication;
406: goto parse_flag;
407:
408: case oKbdInteractiveDevices:
409: charptr = &options->kbd_interactive_devices;
410: goto parse_string;
411:
1.50 markus 412: case oPubkeyAuthentication:
413: intptr = &options->pubkey_authentication;
1.30 markus 414: goto parse_flag;
415:
1.17 markus 416: case oRSAAuthentication:
417: intptr = &options->rsa_authentication;
418: goto parse_flag;
419:
420: case oRhostsRSAAuthentication:
421: intptr = &options->rhosts_rsa_authentication;
422: goto parse_flag;
423:
1.72 markus 424: case oHostbasedAuthentication:
425: intptr = &options->hostbased_authentication;
426: goto parse_flag;
427:
1.59 markus 428: case oChallengeResponseAuthentication:
1.78 markus 429: intptr = &options->challenge_response_authentication;
1.17 markus 430: goto parse_flag;
1.108 jakob 431:
1.118 markus 432: case oGssAuthentication:
433: intptr = &options->gss_authentication;
434: goto parse_flag;
435:
436: case oGssDelegateCreds:
437: intptr = &options->gss_deleg_creds;
438: goto parse_flag;
439:
1.17 markus 440: case oBatchMode:
441: intptr = &options->batch_mode;
442: goto parse_flag;
443:
444: case oCheckHostIP:
445: intptr = &options->check_host_ip;
446: goto parse_flag;
447:
1.107 jakob 448: case oVerifyHostKeyDNS:
449: intptr = &options->verify_host_key_dns;
1.125 jakob 450: goto parse_yesnoask;
1.107 jakob 451:
1.17 markus 452: case oStrictHostKeyChecking:
453: intptr = &options->strict_host_key_checking;
1.125 jakob 454: parse_yesnoask:
1.42 provos 455: arg = strdelim(&s);
1.40 ho 456: if (!arg || *arg == '\0')
1.60 stevesk 457: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 458: filename, linenum);
1.17 markus 459: value = 0; /* To avoid compiler warning... */
1.38 provos 460: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 461: value = 1;
1.38 provos 462: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 463: value = 0;
1.38 provos 464: else if (strcmp(arg, "ask") == 0)
1.17 markus 465: value = 2;
466: else
467: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
468: if (*activep && *intptr == -1)
469: *intptr = value;
470: break;
471:
472: case oCompression:
473: intptr = &options->compression;
474: goto parse_flag;
475:
1.126 markus 476: case oTCPKeepAlive:
477: intptr = &options->tcp_keep_alive;
1.17 markus 478: goto parse_flag;
479:
1.91 markus 480: case oNoHostAuthenticationForLocalhost:
481: intptr = &options->no_host_authentication_for_localhost;
482: goto parse_flag;
483:
1.17 markus 484: case oNumberOfPasswordPrompts:
485: intptr = &options->number_of_password_prompts;
486: goto parse_int;
487:
488: case oCompressionLevel:
489: intptr = &options->compression_level;
490: goto parse_int;
491:
1.105 markus 492: case oRekeyLimit:
493: intptr = &options->rekey_limit;
494: arg = strdelim(&s);
495: if (!arg || *arg == '\0')
496: fatal("%.200s line %d: Missing argument.", filename, linenum);
497: if (arg[0] < '0' || arg[0] > '9')
498: fatal("%.200s line %d: Bad number.", filename, linenum);
1.146 djm 499: orig = val64 = strtoll(arg, &endofnumber, 10);
1.105 markus 500: if (arg == endofnumber)
501: fatal("%.200s line %d: Bad number.", filename, linenum);
502: switch (toupper(*endofnumber)) {
1.146 djm 503: case '\0':
504: scale = 1;
505: break;
1.105 markus 506: case 'K':
1.146 djm 507: scale = 1<<10;
1.105 markus 508: break;
509: case 'M':
1.146 djm 510: scale = 1<<20;
1.105 markus 511: break;
512: case 'G':
1.146 djm 513: scale = 1<<30;
1.105 markus 514: break;
1.146 djm 515: default:
516: fatal("%.200s line %d: Invalid RekeyLimit suffix",
517: filename, linenum);
1.105 markus 518: }
1.146 djm 519: val64 *= scale;
520: /* detect integer wrap and too-large limits */
521: if ((val64 / scale) != orig || val64 > INT_MAX)
522: fatal("%.200s line %d: RekeyLimit too large",
523: filename, linenum);
524: if (val64 < 16)
525: fatal("%.200s line %d: RekeyLimit too small",
526: filename, linenum);
1.105 markus 527: if (*activep && *intptr == -1)
1.146 djm 528: *intptr = (int)val64;
1.105 markus 529: break;
530:
1.17 markus 531: case oIdentityFile:
1.42 provos 532: arg = strdelim(&s);
1.40 ho 533: if (!arg || *arg == '\0')
1.17 markus 534: fatal("%.200s line %d: Missing argument.", filename, linenum);
535: if (*activep) {
1.50 markus 536: intptr = &options->num_identity_files;
1.27 markus 537: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 538: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 539: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.50 markus 540: charptr = &options->identity_files[*intptr];
1.38 provos 541: *charptr = xstrdup(arg);
1.27 markus 542: *intptr = *intptr + 1;
1.17 markus 543: }
544: break;
545:
1.34 markus 546: case oXAuthLocation:
547: charptr=&options->xauth_location;
548: goto parse_string;
549:
1.17 markus 550: case oUser:
551: charptr = &options->user;
552: parse_string:
1.42 provos 553: arg = strdelim(&s);
1.40 ho 554: if (!arg || *arg == '\0')
1.17 markus 555: fatal("%.200s line %d: Missing argument.", filename, linenum);
556: if (*activep && *charptr == NULL)
1.38 provos 557: *charptr = xstrdup(arg);
1.17 markus 558: break;
559:
560: case oGlobalKnownHostsFile:
561: charptr = &options->system_hostfile;
562: goto parse_string;
563:
564: case oUserKnownHostsFile:
565: charptr = &options->user_hostfile;
566: goto parse_string;
567:
1.27 markus 568: case oGlobalKnownHostsFile2:
569: charptr = &options->system_hostfile2;
570: goto parse_string;
571:
572: case oUserKnownHostsFile2:
573: charptr = &options->user_hostfile2;
574: goto parse_string;
575:
1.17 markus 576: case oHostName:
577: charptr = &options->hostname;
578: goto parse_string;
579:
1.52 markus 580: case oHostKeyAlias:
581: charptr = &options->host_key_alias;
582: goto parse_string;
583:
1.67 markus 584: case oPreferredAuthentications:
585: charptr = &options->preferred_authentications;
586: goto parse_string;
587:
1.77 markus 588: case oBindAddress:
589: charptr = &options->bind_address;
590: goto parse_string;
591:
1.85 jakob 592: case oSmartcardDevice:
1.86 markus 593: charptr = &options->smartcard_device;
594: goto parse_string;
1.85 jakob 595:
1.17 markus 596: case oProxyCommand:
1.144 reyk 597: charptr = &options->proxy_command;
598: parse_command:
1.113 markus 599: if (s == NULL)
600: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 601: len = strspn(s, WHITESPACE "=");
1.17 markus 602: if (*activep && *charptr == NULL)
1.102 markus 603: *charptr = xstrdup(s + len);
1.17 markus 604: return 0;
605:
606: case oPort:
607: intptr = &options->port;
608: parse_int:
1.42 provos 609: arg = strdelim(&s);
1.40 ho 610: if (!arg || *arg == '\0')
1.17 markus 611: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 612: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 613: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 614:
615: /* Octal, decimal, or hex format? */
1.38 provos 616: value = strtol(arg, &endofnumber, 0);
617: if (arg == endofnumber)
1.21 markus 618: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 619: if (*activep && *intptr == -1)
620: *intptr = value;
621: break;
622:
623: case oConnectionAttempts:
624: intptr = &options->connection_attempts;
625: goto parse_int;
626:
627: case oCipher:
628: intptr = &options->cipher;
1.42 provos 629: arg = strdelim(&s);
1.40 ho 630: if (!arg || *arg == '\0')
1.32 markus 631: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 632: value = cipher_number(arg);
1.17 markus 633: if (value == -1)
634: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 635: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 636: if (*activep && *intptr == -1)
637: *intptr = value;
638: break;
639:
1.25 markus 640: case oCiphers:
1.42 provos 641: arg = strdelim(&s);
1.40 ho 642: if (!arg || *arg == '\0')
1.32 markus 643: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 644: if (!ciphers_valid(arg))
1.31 markus 645: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 646: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 647: if (*activep && options->ciphers == NULL)
1.38 provos 648: options->ciphers = xstrdup(arg);
1.25 markus 649: break;
650:
1.62 markus 651: case oMacs:
652: arg = strdelim(&s);
653: if (!arg || *arg == '\0')
654: fatal("%.200s line %d: Missing argument.", filename, linenum);
655: if (!mac_valid(arg))
656: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 657: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 658: if (*activep && options->macs == NULL)
659: options->macs = xstrdup(arg);
660: break;
661:
1.76 markus 662: case oHostKeyAlgorithms:
663: arg = strdelim(&s);
664: if (!arg || *arg == '\0')
665: fatal("%.200s line %d: Missing argument.", filename, linenum);
666: if (!key_names_valid2(arg))
667: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 668: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 669: if (*activep && options->hostkeyalgorithms == NULL)
670: options->hostkeyalgorithms = xstrdup(arg);
671: break;
672:
1.25 markus 673: case oProtocol:
674: intptr = &options->protocol;
1.42 provos 675: arg = strdelim(&s);
1.40 ho 676: if (!arg || *arg == '\0')
1.32 markus 677: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 678: value = proto_spec(arg);
1.25 markus 679: if (value == SSH_PROTO_UNKNOWN)
680: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 681: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 682: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
683: *intptr = value;
684: break;
685:
1.17 markus 686: case oLogLevel:
687: intptr = (int *) &options->log_level;
1.42 provos 688: arg = strdelim(&s);
1.38 provos 689: value = log_level_number(arg);
1.95 markus 690: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 691: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 692: filename, linenum, arg ? arg : "<NONE>");
1.95 markus 693: if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET)
1.17 markus 694: *intptr = (LogLevel) value;
695: break;
696:
1.88 stevesk 697: case oLocalForward:
1.17 markus 698: case oRemoteForward:
1.42 provos 699: arg = strdelim(&s);
1.135 djm 700: if (arg == NULL || *arg == '\0')
1.88 stevesk 701: fatal("%.200s line %d: Missing port argument.",
702: filename, linenum);
1.135 djm 703: arg2 = strdelim(&s);
704: if (arg2 == NULL || *arg2 == '\0')
705: fatal("%.200s line %d: Missing target argument.",
1.88 stevesk 706: filename, linenum);
1.135 djm 707:
708: /* construct a string for parse_forward */
709: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
710:
711: if (parse_forward(&fwd, fwdarg) == 0)
1.88 stevesk 712: fatal("%.200s line %d: Bad forwarding specification.",
713: filename, linenum);
1.135 djm 714:
1.88 stevesk 715: if (*activep) {
716: if (opcode == oLocalForward)
1.135 djm 717: add_local_forward(options, &fwd);
1.88 stevesk 718: else if (opcode == oRemoteForward)
1.135 djm 719: add_remote_forward(options, &fwd);
1.88 stevesk 720: }
1.17 markus 721: break;
1.71 markus 722:
723: case oDynamicForward:
724: arg = strdelim(&s);
725: if (!arg || *arg == '\0')
726: fatal("%.200s line %d: Missing port argument.",
727: filename, linenum);
1.135 djm 728: memset(&fwd, '\0', sizeof(fwd));
729: fwd.connect_host = "socks";
730: fwd.listen_host = hpdelim(&arg);
731: if (fwd.listen_host == NULL ||
732: strlen(fwd.listen_host) >= NI_MAXHOST)
733: fatal("%.200s line %d: Bad forwarding specification.",
734: filename, linenum);
735: if (arg) {
736: fwd.listen_port = a2port(arg);
737: fwd.listen_host = cleanhostname(fwd.listen_host);
738: } else {
739: fwd.listen_port = a2port(fwd.listen_host);
1.143 djm 740: fwd.listen_host = NULL;
1.135 djm 741: }
742: if (fwd.listen_port == 0)
1.71 markus 743: fatal("%.200s line %d: Badly formatted port number.",
744: filename, linenum);
1.87 markus 745: if (*activep)
1.135 djm 746: add_local_forward(options, &fwd);
1.72 markus 747: break;
1.17 markus 748:
1.90 stevesk 749: case oClearAllForwardings:
750: intptr = &options->clear_forwardings;
751: goto parse_flag;
752:
1.17 markus 753: case oHost:
754: *activep = 0;
1.42 provos 755: while ((arg = strdelim(&s)) != NULL && *arg != '\0')
1.38 provos 756: if (match_pattern(host, arg)) {
757: debug("Applying options for %.100s", arg);
1.17 markus 758: *activep = 1;
759: break;
760: }
1.42 provos 761: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 762: return 0;
763:
764: case oEscapeChar:
765: intptr = &options->escape_char;
1.42 provos 766: arg = strdelim(&s);
1.40 ho 767: if (!arg || *arg == '\0')
1.17 markus 768: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 769: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 770: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
771: value = (u_char) arg[1] & 31;
1.38 provos 772: else if (strlen(arg) == 1)
1.51 markus 773: value = (u_char) arg[0];
1.38 provos 774: else if (strcmp(arg, "none") == 0)
1.79 stevesk 775: value = SSH_ESCAPECHAR_NONE;
1.17 markus 776: else {
777: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 778: filename, linenum);
1.17 markus 779: /* NOTREACHED */
780: value = 0; /* Avoid compiler warning. */
781: }
782: if (*activep && *intptr == -1)
783: *intptr = value;
1.112 djm 784: break;
785:
786: case oAddressFamily:
787: arg = strdelim(&s);
1.140 markus 788: if (!arg || *arg == '\0')
789: fatal("%s line %d: missing address family.",
790: filename, linenum);
1.114 djm 791: intptr = &options->address_family;
1.112 djm 792: if (strcasecmp(arg, "inet") == 0)
1.114 djm 793: value = AF_INET;
1.112 djm 794: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 795: value = AF_INET6;
1.112 djm 796: else if (strcasecmp(arg, "any") == 0)
1.114 djm 797: value = AF_UNSPEC;
1.112 djm 798: else
799: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 800: if (*activep && *intptr == -1)
801: *intptr = value;
1.17 markus 802: break;
803:
1.101 markus 804: case oEnableSSHKeysign:
805: intptr = &options->enable_ssh_keysign;
806: goto parse_flag;
807:
1.128 markus 808: case oIdentitiesOnly:
809: intptr = &options->identities_only;
810: goto parse_flag;
811:
1.127 markus 812: case oServerAliveInterval:
813: intptr = &options->server_alive_interval;
814: goto parse_time;
815:
816: case oServerAliveCountMax:
817: intptr = &options->server_alive_count_max;
818: goto parse_int;
819:
1.130 djm 820: case oSendEnv:
821: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
822: if (strchr(arg, '=') != NULL)
823: fatal("%s line %d: Invalid environment name.",
824: filename, linenum);
1.137 djm 825: if (!*activep)
826: continue;
1.130 djm 827: if (options->num_send_env >= MAX_SEND_ENV)
828: fatal("%s line %d: too many send env.",
829: filename, linenum);
830: options->send_env[options->num_send_env++] =
831: xstrdup(arg);
832: }
833: break;
834:
1.132 djm 835: case oControlPath:
836: charptr = &options->control_path;
837: goto parse_string;
838:
839: case oControlMaster:
840: intptr = &options->control_master;
1.141 djm 841: arg = strdelim(&s);
842: if (!arg || *arg == '\0')
843: fatal("%.200s line %d: Missing ControlMaster argument.",
844: filename, linenum);
845: value = 0; /* To avoid compiler warning... */
846: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
847: value = SSHCTL_MASTER_YES;
848: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
849: value = SSHCTL_MASTER_NO;
850: else if (strcmp(arg, "auto") == 0)
851: value = SSHCTL_MASTER_AUTO;
852: else if (strcmp(arg, "ask") == 0)
853: value = SSHCTL_MASTER_ASK;
854: else if (strcmp(arg, "autoask") == 0)
855: value = SSHCTL_MASTER_AUTO_ASK;
856: else
857: fatal("%.200s line %d: Bad ControlMaster argument.",
858: filename, linenum);
859: if (*activep && *intptr == -1)
860: *intptr = value;
861: break;
1.132 djm 862:
1.136 djm 863: case oHashKnownHosts:
864: intptr = &options->hash_known_hosts;
865: goto parse_flag;
866:
1.144 reyk 867: case oTunnel:
868: intptr = &options->tun_open;
1.145 reyk 869: arg = strdelim(&s);
870: if (!arg || *arg == '\0')
871: fatal("%s line %d: Missing yes/point-to-point/"
872: "ethernet/no argument.", filename, linenum);
873: value = 0; /* silence compiler */
874: if (strcasecmp(arg, "ethernet") == 0)
875: value = SSH_TUNMODE_ETHERNET;
876: else if (strcasecmp(arg, "point-to-point") == 0)
877: value = SSH_TUNMODE_POINTOPOINT;
878: else if (strcasecmp(arg, "yes") == 0)
879: value = SSH_TUNMODE_DEFAULT;
880: else if (strcasecmp(arg, "no") == 0)
881: value = SSH_TUNMODE_NO;
882: else
883: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
884: "no argument: %s", filename, linenum, arg);
885: if (*activep)
886: *intptr = value;
887: break;
1.144 reyk 888:
889: case oTunnelDevice:
890: arg = strdelim(&s);
891: if (!arg || *arg == '\0')
892: fatal("%.200s line %d: Missing argument.", filename, linenum);
893: value = a2tun(arg, &value2);
1.145 reyk 894: if (value == SSH_TUNID_ERR)
1.144 reyk 895: fatal("%.200s line %d: Bad tun device.", filename, linenum);
896: if (*activep) {
897: options->tun_local = value;
898: options->tun_remote = value2;
899: }
900: break;
901:
902: case oLocalCommand:
903: charptr = &options->local_command;
904: goto parse_command;
905:
906: case oPermitLocalCommand:
907: intptr = &options->permit_local_command;
908: goto parse_flag;
909:
1.96 markus 910: case oDeprecated:
1.98 markus 911: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 912: filename, linenum, keyword);
1.98 markus 913: return 0;
1.96 markus 914:
1.110 jakob 915: case oUnsupported:
916: error("%s line %d: Unsupported option \"%s\"",
917: filename, linenum, keyword);
918: return 0;
919:
1.17 markus 920: default:
921: fatal("process_config_line: Unimplemented opcode %d", opcode);
922: }
923:
924: /* Check that there is no garbage at end of line. */
1.57 djm 925: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 926: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 927: filename, linenum, arg);
1.39 ho 928: }
1.17 markus 929: return 0;
1.1 deraadt 930: }
931:
932:
1.19 markus 933: /*
934: * Reads the config file and modifies the options accordingly. Options
935: * should already be initialized before this call. This never returns if
1.89 stevesk 936: * there is an error. If the file does not exist, this returns 0.
1.19 markus 937: */
1.1 deraadt 938:
1.89 stevesk 939: int
1.134 deraadt 940: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 941: int checkperm)
1.1 deraadt 942: {
1.17 markus 943: FILE *f;
944: char line[1024];
945: int active, linenum;
946: int bad_options = 0;
947:
948: /* Open the file. */
1.129 djm 949: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 950: return 0;
1.129 djm 951:
952: if (checkperm) {
953: struct stat sb;
1.134 deraadt 954:
1.131 dtucker 955: if (fstat(fileno(f), &sb) == -1)
1.129 djm 956: fatal("fstat %s: %s", filename, strerror(errno));
957: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 958: (sb.st_mode & 022) != 0))
1.129 djm 959: fatal("Bad owner or permissions on %s", filename);
960: }
1.17 markus 961:
962: debug("Reading configuration data %.200s", filename);
963:
1.19 markus 964: /*
965: * Mark that we are now processing the options. This flag is turned
966: * on/off by Host specifications.
967: */
1.17 markus 968: active = 1;
969: linenum = 0;
970: while (fgets(line, sizeof(line), f)) {
971: /* Update line number counter. */
972: linenum++;
973: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
974: bad_options++;
975: }
976: fclose(f);
977: if (bad_options > 0)
1.64 millert 978: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 979: filename, bad_options);
1.89 stevesk 980: return 1;
1.1 deraadt 981: }
982:
1.19 markus 983: /*
984: * Initializes options to special values that indicate that they have not yet
985: * been set. Read_config_file will only set options with this value. Options
986: * are processed in the following order: command line, user config file,
987: * system config file. Last, fill_default_options is called.
988: */
1.1 deraadt 989:
1.26 markus 990: void
1.17 markus 991: initialize_options(Options * options)
1.1 deraadt 992: {
1.17 markus 993: memset(options, 'X', sizeof(*options));
994: options->forward_agent = -1;
995: options->forward_x11 = -1;
1.123 markus 996: options->forward_x11_trusted = -1;
1.153 markus 997: options->exit_on_forward_failure = -1;
1.34 markus 998: options->xauth_location = NULL;
1.17 markus 999: options->gateway_ports = -1;
1000: options->use_privileged_port = -1;
1001: options->rsa_authentication = -1;
1.50 markus 1002: options->pubkey_authentication = -1;
1.78 markus 1003: options->challenge_response_authentication = -1;
1.118 markus 1004: options->gss_authentication = -1;
1005: options->gss_deleg_creds = -1;
1.17 markus 1006: options->password_authentication = -1;
1.48 markus 1007: options->kbd_interactive_authentication = -1;
1008: options->kbd_interactive_devices = NULL;
1.17 markus 1009: options->rhosts_rsa_authentication = -1;
1.72 markus 1010: options->hostbased_authentication = -1;
1.17 markus 1011: options->batch_mode = -1;
1012: options->check_host_ip = -1;
1013: options->strict_host_key_checking = -1;
1014: options->compression = -1;
1.126 markus 1015: options->tcp_keep_alive = -1;
1.17 markus 1016: options->compression_level = -1;
1017: options->port = -1;
1.114 djm 1018: options->address_family = -1;
1.17 markus 1019: options->connection_attempts = -1;
1.111 djm 1020: options->connection_timeout = -1;
1.17 markus 1021: options->number_of_password_prompts = -1;
1022: options->cipher = -1;
1.25 markus 1023: options->ciphers = NULL;
1.62 markus 1024: options->macs = NULL;
1.76 markus 1025: options->hostkeyalgorithms = NULL;
1.25 markus 1026: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1027: options->num_identity_files = 0;
1028: options->hostname = NULL;
1.52 markus 1029: options->host_key_alias = NULL;
1.17 markus 1030: options->proxy_command = NULL;
1031: options->user = NULL;
1032: options->escape_char = -1;
1033: options->system_hostfile = NULL;
1034: options->user_hostfile = NULL;
1.27 markus 1035: options->system_hostfile2 = NULL;
1036: options->user_hostfile2 = NULL;
1.17 markus 1037: options->num_local_forwards = 0;
1038: options->num_remote_forwards = 0;
1.90 stevesk 1039: options->clear_forwardings = -1;
1.95 markus 1040: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1041: options->preferred_authentications = NULL;
1.77 markus 1042: options->bind_address = NULL;
1.86 markus 1043: options->smartcard_device = NULL;
1.101 markus 1044: options->enable_ssh_keysign = - 1;
1.91 markus 1045: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1046: options->identities_only = - 1;
1.105 markus 1047: options->rekey_limit = - 1;
1.107 jakob 1048: options->verify_host_key_dns = -1;
1.127 markus 1049: options->server_alive_interval = -1;
1050: options->server_alive_count_max = -1;
1.130 djm 1051: options->num_send_env = 0;
1.132 djm 1052: options->control_path = NULL;
1053: options->control_master = -1;
1.136 djm 1054: options->hash_known_hosts = -1;
1.144 reyk 1055: options->tun_open = -1;
1056: options->tun_local = -1;
1057: options->tun_remote = -1;
1058: options->local_command = NULL;
1059: options->permit_local_command = -1;
1.1 deraadt 1060: }
1061:
1.19 markus 1062: /*
1063: * Called after processing other sources of option data, this fills those
1064: * options for which no value has been specified with their default values.
1065: */
1.1 deraadt 1066:
1.26 markus 1067: void
1.17 markus 1068: fill_default_options(Options * options)
1.1 deraadt 1069: {
1.61 deraadt 1070: int len;
1071:
1.17 markus 1072: if (options->forward_agent == -1)
1.33 markus 1073: options->forward_agent = 0;
1.17 markus 1074: if (options->forward_x11 == -1)
1.23 markus 1075: options->forward_x11 = 0;
1.123 markus 1076: if (options->forward_x11_trusted == -1)
1077: options->forward_x11_trusted = 0;
1.153 markus 1078: if (options->exit_on_forward_failure == -1)
1079: options->exit_on_forward_failure = 0;
1.34 markus 1080: if (options->xauth_location == NULL)
1.80 markus 1081: options->xauth_location = _PATH_XAUTH;
1.17 markus 1082: if (options->gateway_ports == -1)
1083: options->gateway_ports = 0;
1084: if (options->use_privileged_port == -1)
1.65 markus 1085: options->use_privileged_port = 0;
1.17 markus 1086: if (options->rsa_authentication == -1)
1087: options->rsa_authentication = 1;
1.50 markus 1088: if (options->pubkey_authentication == -1)
1089: options->pubkey_authentication = 1;
1.78 markus 1090: if (options->challenge_response_authentication == -1)
1.83 markus 1091: options->challenge_response_authentication = 1;
1.118 markus 1092: if (options->gss_authentication == -1)
1.122 markus 1093: options->gss_authentication = 0;
1.118 markus 1094: if (options->gss_deleg_creds == -1)
1095: options->gss_deleg_creds = 0;
1.17 markus 1096: if (options->password_authentication == -1)
1097: options->password_authentication = 1;
1.48 markus 1098: if (options->kbd_interactive_authentication == -1)
1.59 markus 1099: options->kbd_interactive_authentication = 1;
1.17 markus 1100: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1101: options->rhosts_rsa_authentication = 0;
1.72 markus 1102: if (options->hostbased_authentication == -1)
1103: options->hostbased_authentication = 0;
1.17 markus 1104: if (options->batch_mode == -1)
1105: options->batch_mode = 0;
1106: if (options->check_host_ip == -1)
1107: options->check_host_ip = 1;
1108: if (options->strict_host_key_checking == -1)
1109: options->strict_host_key_checking = 2; /* 2 is default */
1110: if (options->compression == -1)
1111: options->compression = 0;
1.126 markus 1112: if (options->tcp_keep_alive == -1)
1113: options->tcp_keep_alive = 1;
1.17 markus 1114: if (options->compression_level == -1)
1115: options->compression_level = 6;
1116: if (options->port == -1)
1117: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1118: if (options->address_family == -1)
1119: options->address_family = AF_UNSPEC;
1.17 markus 1120: if (options->connection_attempts == -1)
1.84 markus 1121: options->connection_attempts = 1;
1.17 markus 1122: if (options->number_of_password_prompts == -1)
1123: options->number_of_password_prompts = 3;
1124: /* Selected in ssh_login(). */
1125: if (options->cipher == -1)
1126: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1127: /* options->ciphers, default set in myproposals.h */
1.62 markus 1128: /* options->macs, default set in myproposals.h */
1.76 markus 1129: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1130: if (options->protocol == SSH_PROTO_UNKNOWN)
1.69 markus 1131: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
1.17 markus 1132: if (options->num_identity_files == 0) {
1.50 markus 1133: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1134: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1135: options->identity_files[options->num_identity_files] =
1.61 deraadt 1136: xmalloc(len);
1137: snprintf(options->identity_files[options->num_identity_files++],
1138: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1139: }
1140: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1141: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1142: options->identity_files[options->num_identity_files] =
1143: xmalloc(len);
1144: snprintf(options->identity_files[options->num_identity_files++],
1145: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1146:
1.61 deraadt 1147: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1148: options->identity_files[options->num_identity_files] =
1.61 deraadt 1149: xmalloc(len);
1150: snprintf(options->identity_files[options->num_identity_files++],
1151: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.50 markus 1152: }
1.27 markus 1153: }
1.17 markus 1154: if (options->escape_char == -1)
1155: options->escape_char = '~';
1156: if (options->system_hostfile == NULL)
1.55 markus 1157: options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
1.17 markus 1158: if (options->user_hostfile == NULL)
1.55 markus 1159: options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
1.27 markus 1160: if (options->system_hostfile2 == NULL)
1.55 markus 1161: options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
1.27 markus 1162: if (options->user_hostfile2 == NULL)
1.55 markus 1163: options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
1.95 markus 1164: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1165: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1166: if (options->clear_forwardings == 1)
1167: clear_forwardings(options);
1.91 markus 1168: if (options->no_host_authentication_for_localhost == - 1)
1169: options->no_host_authentication_for_localhost = 0;
1.128 markus 1170: if (options->identities_only == -1)
1171: options->identities_only = 0;
1.101 markus 1172: if (options->enable_ssh_keysign == -1)
1173: options->enable_ssh_keysign = 0;
1.105 markus 1174: if (options->rekey_limit == -1)
1175: options->rekey_limit = 0;
1.107 jakob 1176: if (options->verify_host_key_dns == -1)
1177: options->verify_host_key_dns = 0;
1.127 markus 1178: if (options->server_alive_interval == -1)
1179: options->server_alive_interval = 0;
1180: if (options->server_alive_count_max == -1)
1181: options->server_alive_count_max = 3;
1.132 djm 1182: if (options->control_master == -1)
1183: options->control_master = 0;
1.136 djm 1184: if (options->hash_known_hosts == -1)
1185: options->hash_known_hosts = 0;
1.144 reyk 1186: if (options->tun_open == -1)
1.145 reyk 1187: options->tun_open = SSH_TUNMODE_NO;
1188: if (options->tun_local == -1)
1189: options->tun_local = SSH_TUNID_ANY;
1190: if (options->tun_remote == -1)
1191: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1192: if (options->permit_local_command == -1)
1193: options->permit_local_command = 0;
1194: /* options->local_command should not be set by default */
1.17 markus 1195: /* options->proxy_command should not be set by default */
1196: /* options->user will be set in the main program if appropriate */
1197: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1198: /* options->host_key_alias should not be set by default */
1.67 markus 1199: /* options->preferred_authentications will be set in ssh */
1.135 djm 1200: }
1201:
1202: /*
1203: * parse_forward
1204: * parses a string containing a port forwarding specification of the form:
1205: * [listenhost:]listenport:connecthost:connectport
1206: * returns number of arguments parsed or zero on error
1207: */
1208: int
1209: parse_forward(Forward *fwd, const char *fwdspec)
1210: {
1211: int i;
1212: char *p, *cp, *fwdarg[4];
1213:
1214: memset(fwd, '\0', sizeof(*fwd));
1215:
1216: cp = p = xstrdup(fwdspec);
1217:
1218: /* skip leading spaces */
1219: while (*cp && isspace(*cp))
1220: cp++;
1221:
1222: for (i = 0; i < 4; ++i)
1223: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1224: break;
1225:
1226: /* Check for trailing garbage in 4-arg case*/
1227: if (cp != NULL)
1228: i = 0; /* failure */
1229:
1230: switch (i) {
1231: case 3:
1232: fwd->listen_host = NULL;
1233: fwd->listen_port = a2port(fwdarg[0]);
1234: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1235: fwd->connect_port = a2port(fwdarg[2]);
1236: break;
1237:
1238: case 4:
1239: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1240: fwd->listen_port = a2port(fwdarg[1]);
1241: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1242: fwd->connect_port = a2port(fwdarg[3]);
1243: break;
1244: default:
1245: i = 0; /* failure */
1246: }
1247:
1248: xfree(p);
1249:
1250: if (fwd->listen_port == 0 && fwd->connect_port == 0)
1251: goto fail_free;
1252:
1253: if (fwd->connect_host != NULL &&
1254: strlen(fwd->connect_host) >= NI_MAXHOST)
1255: goto fail_free;
1256:
1257: return (i);
1258:
1259: fail_free:
1260: if (fwd->connect_host != NULL)
1261: xfree(fwd->connect_host);
1262: if (fwd->listen_host != NULL)
1263: xfree(fwd->listen_host);
1264: return (0);
1.1 deraadt 1265: }
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