Annotation of src/usr.bin/ssh/readconf.c, Revision 1.158
1.158 ! stevesk 1: /* $OpenBSD: readconf.c,v 1.157 2006/07/22 20:48:23 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>
1.158 ! stevesk 26: #include <stdio.h>
1.157 stevesk 27: #include <string.h>
1.156 stevesk 28: #include <unistd.h>
1.1 deraadt 29:
30: #include "ssh.h"
31: #include "xmalloc.h"
1.25 markus 32: #include "compat.h"
1.58 markus 33: #include "cipher.h"
1.55 markus 34: #include "pathnames.h"
1.58 markus 35: #include "log.h"
36: #include "readconf.h"
37: #include "match.h"
38: #include "misc.h"
1.62 markus 39: #include "kex.h"
40: #include "mac.h"
1.1 deraadt 41:
42: /* Format of the configuration file:
43:
44: # Configuration data is parsed as follows:
45: # 1. command line options
46: # 2. user-specific file
47: # 3. system-wide file
48: # Any configuration value is only changed the first time it is set.
49: # Thus, host-specific definitions should be at the beginning of the
50: # configuration file, and defaults at the end.
51:
52: # Host-specific declarations. These may override anything above. A single
53: # host may match multiple declarations; these are processed in the order
54: # that they are given in.
55:
56: Host *.ngs.fi ngs.fi
1.96 markus 57: User foo
1.1 deraadt 58:
59: Host fake.com
60: HostName another.host.name.real.org
61: User blaah
62: Port 34289
63: ForwardX11 no
64: ForwardAgent no
65:
66: Host books.com
67: RemoteForward 9999 shadows.cs.hut.fi:9999
68: Cipher 3des
69:
70: Host fascist.blob.com
71: Port 23123
72: User tylonen
73: PasswordAuthentication no
74:
75: Host puukko.hut.fi
76: User t35124p
77: ProxyCommand ssh-proxy %h %p
78:
79: Host *.fr
1.96 markus 80: PublicKeyAuthentication no
1.1 deraadt 81:
82: Host *.su
83: Cipher none
84: PasswordAuthentication no
85:
1.144 reyk 86: Host vpn.fake.com
87: Tunnel yes
88: TunnelDevice 3
89:
1.1 deraadt 90: # Defaults for various options
91: Host *
92: ForwardAgent no
1.50 markus 93: ForwardX11 no
1.1 deraadt 94: PasswordAuthentication yes
95: RSAAuthentication yes
96: RhostsRSAAuthentication yes
97: StrictHostKeyChecking yes
1.126 markus 98: TcpKeepAlive no
1.1 deraadt 99: IdentityFile ~/.ssh/identity
100: Port 22
101: EscapeChar ~
102:
103: */
104:
105: /* Keyword tokens. */
106:
1.17 markus 107: typedef enum {
108: oBadOption,
1.123 markus 109: oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts,
1.153 markus 110: oExitOnForwardFailure,
1.100 deraadt 111: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 112: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 113: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
114: oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
115: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
116: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 117: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 118: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 119: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 120: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 121: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.90 stevesk 122: oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
1.96 markus 123: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 124: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 125: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 126: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.136 djm 127: oSendEnv, oControlPath, oControlMaster, oHashKnownHosts,
1.144 reyk 128: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.110 jakob 129: oDeprecated, oUnsupported
1.1 deraadt 130: } OpCodes;
131:
132: /* Textual representations of the tokens. */
133:
1.17 markus 134: static struct {
135: const char *name;
136: OpCodes opcode;
137: } keywords[] = {
138: { "forwardagent", oForwardAgent },
139: { "forwardx11", oForwardX11 },
1.123 markus 140: { "forwardx11trusted", oForwardX11Trusted },
1.153 markus 141: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 142: { "xauthlocation", oXAuthLocation },
1.17 markus 143: { "gatewayports", oGatewayPorts },
144: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 145: { "rhostsauthentication", oDeprecated },
1.17 markus 146: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 147: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
148: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 149: { "rsaauthentication", oRSAAuthentication },
1.50 markus 150: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 151: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 152: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 153: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 154: { "challengeresponseauthentication", oChallengeResponseAuthentication },
155: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
156: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 157: { "kerberosauthentication", oUnsupported },
158: { "kerberostgtpassing", oUnsupported },
159: { "afstokenpassing", oUnsupported },
1.118 markus 160: #if defined(GSSAPI)
161: { "gssapiauthentication", oGssAuthentication },
162: { "gssapidelegatecredentials", oGssDelegateCreds },
163: #else
164: { "gssapiauthentication", oUnsupported },
165: { "gssapidelegatecredentials", oUnsupported },
166: #endif
1.96 markus 167: { "fallbacktorsh", oDeprecated },
168: { "usersh", oDeprecated },
1.17 markus 169: { "identityfile", oIdentityFile },
1.50 markus 170: { "identityfile2", oIdentityFile }, /* alias */
1.128 markus 171: { "identitiesonly", oIdentitiesOnly },
1.17 markus 172: { "hostname", oHostName },
1.52 markus 173: { "hostkeyalias", oHostKeyAlias },
1.17 markus 174: { "proxycommand", oProxyCommand },
175: { "port", oPort },
176: { "cipher", oCipher },
1.25 markus 177: { "ciphers", oCiphers },
1.62 markus 178: { "macs", oMacs },
1.25 markus 179: { "protocol", oProtocol },
1.17 markus 180: { "remoteforward", oRemoteForward },
181: { "localforward", oLocalForward },
182: { "user", oUser },
183: { "host", oHost },
184: { "escapechar", oEscapeChar },
185: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.81 markus 186: { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */
1.27 markus 187: { "globalknownhostsfile2", oGlobalKnownHostsFile2 },
1.81 markus 188: { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
1.17 markus 189: { "connectionattempts", oConnectionAttempts },
190: { "batchmode", oBatchMode },
191: { "checkhostip", oCheckHostIP },
192: { "stricthostkeychecking", oStrictHostKeyChecking },
193: { "compression", oCompression },
194: { "compressionlevel", oCompressionLevel },
1.126 markus 195: { "tcpkeepalive", oTCPKeepAlive },
196: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 197: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
198: { "loglevel", oLogLevel },
1.71 markus 199: { "dynamicforward", oDynamicForward },
1.67 markus 200: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 201: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 202: { "bindaddress", oBindAddress },
1.110 jakob 203: #ifdef SMARTCARD
1.85 jakob 204: { "smartcarddevice", oSmartcardDevice },
1.110 jakob 205: #else
206: { "smartcarddevice", oUnsupported },
207: #endif
1.93 deraadt 208: { "clearallforwardings", oClearAllForwardings },
1.101 markus 209: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 210: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 211: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 212: { "rekeylimit", oRekeyLimit },
1.111 djm 213: { "connecttimeout", oConnectTimeout },
1.112 djm 214: { "addressfamily", oAddressFamily },
1.127 markus 215: { "serveraliveinterval", oServerAliveInterval },
216: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 217: { "sendenv", oSendEnv },
1.132 djm 218: { "controlpath", oControlPath },
219: { "controlmaster", oControlMaster },
1.136 djm 220: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 221: { "tunnel", oTunnel },
222: { "tunneldevice", oTunnelDevice },
223: { "localcommand", oLocalCommand },
224: { "permitlocalcommand", oPermitLocalCommand },
1.92 stevesk 225: { NULL, oBadOption }
1.13 markus 226: };
227:
1.19 markus 228: /*
229: * Adds a local TCP/IP port forward to options. Never returns if there is an
230: * error.
231: */
1.1 deraadt 232:
1.26 markus 233: void
1.135 djm 234: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 235: {
1.17 markus 236: Forward *fwd;
237: extern uid_t original_real_uid;
1.135 djm 238: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 239: fatal("Privileged ports can only be forwarded by root.");
1.17 markus 240: if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
241: fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
242: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 243:
244: fwd->listen_host = (newfwd->listen_host == NULL) ?
245: NULL : xstrdup(newfwd->listen_host);
246: fwd->listen_port = newfwd->listen_port;
247: fwd->connect_host = xstrdup(newfwd->connect_host);
248: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 249: }
250:
1.19 markus 251: /*
252: * Adds a remote TCP/IP port forward to options. Never returns if there is
253: * an error.
254: */
1.1 deraadt 255:
1.26 markus 256: void
1.135 djm 257: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 258: {
1.17 markus 259: Forward *fwd;
260: if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
261: fatal("Too many remote forwards (max %d).",
1.93 deraadt 262: SSH_MAX_FORWARDS_PER_DIRECTION);
1.17 markus 263: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 264:
265: fwd->listen_host = (newfwd->listen_host == NULL) ?
266: NULL : xstrdup(newfwd->listen_host);
267: fwd->listen_port = newfwd->listen_port;
268: fwd->connect_host = xstrdup(newfwd->connect_host);
269: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 270: }
271:
1.90 stevesk 272: static void
273: clear_forwardings(Options *options)
274: {
275: int i;
276:
1.135 djm 277: for (i = 0; i < options->num_local_forwards; i++) {
1.138 dtucker 278: if (options->local_forwards[i].listen_host != NULL)
279: xfree(options->local_forwards[i].listen_host);
1.135 djm 280: xfree(options->local_forwards[i].connect_host);
281: }
1.90 stevesk 282: options->num_local_forwards = 0;
1.135 djm 283: for (i = 0; i < options->num_remote_forwards; i++) {
1.138 dtucker 284: if (options->remote_forwards[i].listen_host != NULL)
285: xfree(options->remote_forwards[i].listen_host);
1.135 djm 286: xfree(options->remote_forwards[i].connect_host);
287: }
1.90 stevesk 288: options->num_remote_forwards = 0;
1.145 reyk 289: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 290: }
291:
1.19 markus 292: /*
1.70 stevesk 293: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 294: */
1.1 deraadt 295:
1.26 markus 296: static OpCodes
1.17 markus 297: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 298: {
1.51 markus 299: u_int i;
1.1 deraadt 300:
1.17 markus 301: for (i = 0; keywords[i].name; i++)
1.20 markus 302: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 303: return keywords[i].opcode;
304:
1.75 stevesk 305: error("%s: line %d: Bad configuration option: %s",
306: filename, linenum, cp);
1.17 markus 307: return oBadOption;
1.1 deraadt 308: }
309:
1.19 markus 310: /*
311: * Processes a single option line as used in the configuration files. This
312: * only sets those values that have not already been set.
313: */
1.102 markus 314: #define WHITESPACE " \t\r\n"
1.1 deraadt 315:
1.14 markus 316: int
317: process_config_line(Options *options, const char *host,
1.17 markus 318: char *line, const char *filename, int linenum,
319: int *activep)
1.1 deraadt 320: {
1.135 djm 321: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
1.146 djm 322: int opcode, *intptr, value, value2, scale;
323: long long orig, val64;
1.102 markus 324: size_t len;
1.135 djm 325: Forward fwd;
1.106 djm 326:
327: /* Strip trailing whitespace */
1.139 deraadt 328: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 329: if (strchr(WHITESPACE, line[len]) == NULL)
330: break;
331: line[len] = '\0';
332: }
1.1 deraadt 333:
1.42 provos 334: s = line;
335: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 336: if ((keyword = strdelim(&s)) == NULL)
337: return 0;
1.42 provos 338: /* Ignore leading whitespace. */
339: if (*keyword == '\0')
1.43 markus 340: keyword = strdelim(&s);
1.56 deraadt 341: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 342: return 0;
343:
1.38 provos 344: opcode = parse_token(keyword, filename, linenum);
1.17 markus 345:
346: switch (opcode) {
347: case oBadOption:
1.19 markus 348: /* don't panic, but count bad options */
349: return -1;
1.17 markus 350: /* NOTREACHED */
1.111 djm 351: case oConnectTimeout:
352: intptr = &options->connection_timeout;
1.127 markus 353: parse_time:
1.111 djm 354: arg = strdelim(&s);
355: if (!arg || *arg == '\0')
356: fatal("%s line %d: missing time value.",
357: filename, linenum);
358: if ((value = convtime(arg)) == -1)
359: fatal("%s line %d: invalid time value.",
360: filename, linenum);
361: if (*intptr == -1)
362: *intptr = value;
363: break;
364:
1.17 markus 365: case oForwardAgent:
366: intptr = &options->forward_agent;
367: parse_flag:
1.42 provos 368: arg = strdelim(&s);
1.40 ho 369: if (!arg || *arg == '\0')
1.17 markus 370: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
371: value = 0; /* To avoid compiler warning... */
1.38 provos 372: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 373: value = 1;
1.38 provos 374: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 375: value = 0;
376: else
377: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
378: if (*activep && *intptr == -1)
379: *intptr = value;
380: break;
381:
382: case oForwardX11:
383: intptr = &options->forward_x11;
384: goto parse_flag;
385:
1.123 markus 386: case oForwardX11Trusted:
387: intptr = &options->forward_x11_trusted;
388: goto parse_flag;
389:
1.17 markus 390: case oGatewayPorts:
391: intptr = &options->gateway_ports;
392: goto parse_flag;
393:
1.153 markus 394: case oExitOnForwardFailure:
395: intptr = &options->exit_on_forward_failure;
396: goto parse_flag;
397:
1.17 markus 398: case oUsePrivilegedPort:
399: intptr = &options->use_privileged_port;
400: goto parse_flag;
401:
402: case oPasswordAuthentication:
403: intptr = &options->password_authentication;
404: goto parse_flag;
405:
1.48 markus 406: case oKbdInteractiveAuthentication:
407: intptr = &options->kbd_interactive_authentication;
408: goto parse_flag;
409:
410: case oKbdInteractiveDevices:
411: charptr = &options->kbd_interactive_devices;
412: goto parse_string;
413:
1.50 markus 414: case oPubkeyAuthentication:
415: intptr = &options->pubkey_authentication;
1.30 markus 416: goto parse_flag;
417:
1.17 markus 418: case oRSAAuthentication:
419: intptr = &options->rsa_authentication;
420: goto parse_flag;
421:
422: case oRhostsRSAAuthentication:
423: intptr = &options->rhosts_rsa_authentication;
424: goto parse_flag;
425:
1.72 markus 426: case oHostbasedAuthentication:
427: intptr = &options->hostbased_authentication;
428: goto parse_flag;
429:
1.59 markus 430: case oChallengeResponseAuthentication:
1.78 markus 431: intptr = &options->challenge_response_authentication;
1.17 markus 432: goto parse_flag;
1.108 jakob 433:
1.118 markus 434: case oGssAuthentication:
435: intptr = &options->gss_authentication;
436: goto parse_flag;
437:
438: case oGssDelegateCreds:
439: intptr = &options->gss_deleg_creds;
440: goto parse_flag;
441:
1.17 markus 442: case oBatchMode:
443: intptr = &options->batch_mode;
444: goto parse_flag;
445:
446: case oCheckHostIP:
447: intptr = &options->check_host_ip;
448: goto parse_flag;
449:
1.107 jakob 450: case oVerifyHostKeyDNS:
451: intptr = &options->verify_host_key_dns;
1.125 jakob 452: goto parse_yesnoask;
1.107 jakob 453:
1.17 markus 454: case oStrictHostKeyChecking:
455: intptr = &options->strict_host_key_checking;
1.125 jakob 456: parse_yesnoask:
1.42 provos 457: arg = strdelim(&s);
1.40 ho 458: if (!arg || *arg == '\0')
1.60 stevesk 459: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 460: filename, linenum);
1.17 markus 461: value = 0; /* To avoid compiler warning... */
1.38 provos 462: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 463: value = 1;
1.38 provos 464: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 465: value = 0;
1.38 provos 466: else if (strcmp(arg, "ask") == 0)
1.17 markus 467: value = 2;
468: else
469: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
470: if (*activep && *intptr == -1)
471: *intptr = value;
472: break;
473:
474: case oCompression:
475: intptr = &options->compression;
476: goto parse_flag;
477:
1.126 markus 478: case oTCPKeepAlive:
479: intptr = &options->tcp_keep_alive;
1.17 markus 480: goto parse_flag;
481:
1.91 markus 482: case oNoHostAuthenticationForLocalhost:
483: intptr = &options->no_host_authentication_for_localhost;
484: goto parse_flag;
485:
1.17 markus 486: case oNumberOfPasswordPrompts:
487: intptr = &options->number_of_password_prompts;
488: goto parse_int;
489:
490: case oCompressionLevel:
491: intptr = &options->compression_level;
492: goto parse_int;
493:
1.105 markus 494: case oRekeyLimit:
495: intptr = &options->rekey_limit;
496: arg = strdelim(&s);
497: if (!arg || *arg == '\0')
498: fatal("%.200s line %d: Missing argument.", filename, linenum);
499: if (arg[0] < '0' || arg[0] > '9')
500: fatal("%.200s line %d: Bad number.", filename, linenum);
1.146 djm 501: orig = val64 = strtoll(arg, &endofnumber, 10);
1.105 markus 502: if (arg == endofnumber)
503: fatal("%.200s line %d: Bad number.", filename, linenum);
504: switch (toupper(*endofnumber)) {
1.146 djm 505: case '\0':
506: scale = 1;
507: break;
1.105 markus 508: case 'K':
1.146 djm 509: scale = 1<<10;
1.105 markus 510: break;
511: case 'M':
1.146 djm 512: scale = 1<<20;
1.105 markus 513: break;
514: case 'G':
1.146 djm 515: scale = 1<<30;
1.105 markus 516: break;
1.146 djm 517: default:
518: fatal("%.200s line %d: Invalid RekeyLimit suffix",
519: filename, linenum);
1.105 markus 520: }
1.146 djm 521: val64 *= scale;
522: /* detect integer wrap and too-large limits */
523: if ((val64 / scale) != orig || val64 > INT_MAX)
524: fatal("%.200s line %d: RekeyLimit too large",
525: filename, linenum);
526: if (val64 < 16)
527: fatal("%.200s line %d: RekeyLimit too small",
528: filename, linenum);
1.105 markus 529: if (*activep && *intptr == -1)
1.146 djm 530: *intptr = (int)val64;
1.105 markus 531: break;
532:
1.17 markus 533: case oIdentityFile:
1.42 provos 534: arg = strdelim(&s);
1.40 ho 535: if (!arg || *arg == '\0')
1.17 markus 536: fatal("%.200s line %d: Missing argument.", filename, linenum);
537: if (*activep) {
1.50 markus 538: intptr = &options->num_identity_files;
1.27 markus 539: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 540: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 541: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.50 markus 542: charptr = &options->identity_files[*intptr];
1.38 provos 543: *charptr = xstrdup(arg);
1.27 markus 544: *intptr = *intptr + 1;
1.17 markus 545: }
546: break;
547:
1.34 markus 548: case oXAuthLocation:
549: charptr=&options->xauth_location;
550: goto parse_string;
551:
1.17 markus 552: case oUser:
553: charptr = &options->user;
554: parse_string:
1.42 provos 555: arg = strdelim(&s);
1.40 ho 556: if (!arg || *arg == '\0')
1.17 markus 557: fatal("%.200s line %d: Missing argument.", filename, linenum);
558: if (*activep && *charptr == NULL)
1.38 provos 559: *charptr = xstrdup(arg);
1.17 markus 560: break;
561:
562: case oGlobalKnownHostsFile:
563: charptr = &options->system_hostfile;
564: goto parse_string;
565:
566: case oUserKnownHostsFile:
567: charptr = &options->user_hostfile;
568: goto parse_string;
569:
1.27 markus 570: case oGlobalKnownHostsFile2:
571: charptr = &options->system_hostfile2;
572: goto parse_string;
573:
574: case oUserKnownHostsFile2:
575: charptr = &options->user_hostfile2;
576: goto parse_string;
577:
1.17 markus 578: case oHostName:
579: charptr = &options->hostname;
580: goto parse_string;
581:
1.52 markus 582: case oHostKeyAlias:
583: charptr = &options->host_key_alias;
584: goto parse_string;
585:
1.67 markus 586: case oPreferredAuthentications:
587: charptr = &options->preferred_authentications;
588: goto parse_string;
589:
1.77 markus 590: case oBindAddress:
591: charptr = &options->bind_address;
592: goto parse_string;
593:
1.85 jakob 594: case oSmartcardDevice:
1.86 markus 595: charptr = &options->smartcard_device;
596: goto parse_string;
1.85 jakob 597:
1.17 markus 598: case oProxyCommand:
1.144 reyk 599: charptr = &options->proxy_command;
600: parse_command:
1.113 markus 601: if (s == NULL)
602: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 603: len = strspn(s, WHITESPACE "=");
1.17 markus 604: if (*activep && *charptr == NULL)
1.102 markus 605: *charptr = xstrdup(s + len);
1.17 markus 606: return 0;
607:
608: case oPort:
609: intptr = &options->port;
610: parse_int:
1.42 provos 611: arg = strdelim(&s);
1.40 ho 612: if (!arg || *arg == '\0')
1.17 markus 613: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 614: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 615: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 616:
617: /* Octal, decimal, or hex format? */
1.38 provos 618: value = strtol(arg, &endofnumber, 0);
619: if (arg == endofnumber)
1.21 markus 620: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 621: if (*activep && *intptr == -1)
622: *intptr = value;
623: break;
624:
625: case oConnectionAttempts:
626: intptr = &options->connection_attempts;
627: goto parse_int;
628:
629: case oCipher:
630: intptr = &options->cipher;
1.42 provos 631: arg = strdelim(&s);
1.40 ho 632: if (!arg || *arg == '\0')
1.32 markus 633: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 634: value = cipher_number(arg);
1.17 markus 635: if (value == -1)
636: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 637: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 638: if (*activep && *intptr == -1)
639: *intptr = value;
640: break;
641:
1.25 markus 642: case oCiphers:
1.42 provos 643: arg = strdelim(&s);
1.40 ho 644: if (!arg || *arg == '\0')
1.32 markus 645: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 646: if (!ciphers_valid(arg))
1.31 markus 647: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 648: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 649: if (*activep && options->ciphers == NULL)
1.38 provos 650: options->ciphers = xstrdup(arg);
1.25 markus 651: break;
652:
1.62 markus 653: case oMacs:
654: arg = strdelim(&s);
655: if (!arg || *arg == '\0')
656: fatal("%.200s line %d: Missing argument.", filename, linenum);
657: if (!mac_valid(arg))
658: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 659: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 660: if (*activep && options->macs == NULL)
661: options->macs = xstrdup(arg);
662: break;
663:
1.76 markus 664: case oHostKeyAlgorithms:
665: arg = strdelim(&s);
666: if (!arg || *arg == '\0')
667: fatal("%.200s line %d: Missing argument.", filename, linenum);
668: if (!key_names_valid2(arg))
669: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 670: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 671: if (*activep && options->hostkeyalgorithms == NULL)
672: options->hostkeyalgorithms = xstrdup(arg);
673: break;
674:
1.25 markus 675: case oProtocol:
676: intptr = &options->protocol;
1.42 provos 677: arg = strdelim(&s);
1.40 ho 678: if (!arg || *arg == '\0')
1.32 markus 679: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 680: value = proto_spec(arg);
1.25 markus 681: if (value == SSH_PROTO_UNKNOWN)
682: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 683: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 684: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
685: *intptr = value;
686: break;
687:
1.17 markus 688: case oLogLevel:
689: intptr = (int *) &options->log_level;
1.42 provos 690: arg = strdelim(&s);
1.38 provos 691: value = log_level_number(arg);
1.95 markus 692: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 693: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 694: filename, linenum, arg ? arg : "<NONE>");
1.95 markus 695: if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET)
1.17 markus 696: *intptr = (LogLevel) value;
697: break;
698:
1.88 stevesk 699: case oLocalForward:
1.17 markus 700: case oRemoteForward:
1.42 provos 701: arg = strdelim(&s);
1.135 djm 702: if (arg == NULL || *arg == '\0')
1.88 stevesk 703: fatal("%.200s line %d: Missing port argument.",
704: filename, linenum);
1.135 djm 705: arg2 = strdelim(&s);
706: if (arg2 == NULL || *arg2 == '\0')
707: fatal("%.200s line %d: Missing target argument.",
1.88 stevesk 708: filename, linenum);
1.135 djm 709:
710: /* construct a string for parse_forward */
711: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
712:
713: if (parse_forward(&fwd, fwdarg) == 0)
1.88 stevesk 714: fatal("%.200s line %d: Bad forwarding specification.",
715: filename, linenum);
1.135 djm 716:
1.88 stevesk 717: if (*activep) {
718: if (opcode == oLocalForward)
1.135 djm 719: add_local_forward(options, &fwd);
1.88 stevesk 720: else if (opcode == oRemoteForward)
1.135 djm 721: add_remote_forward(options, &fwd);
1.88 stevesk 722: }
1.17 markus 723: break;
1.71 markus 724:
725: case oDynamicForward:
726: arg = strdelim(&s);
727: if (!arg || *arg == '\0')
728: fatal("%.200s line %d: Missing port argument.",
729: filename, linenum);
1.135 djm 730: memset(&fwd, '\0', sizeof(fwd));
731: fwd.connect_host = "socks";
732: fwd.listen_host = hpdelim(&arg);
733: if (fwd.listen_host == NULL ||
734: strlen(fwd.listen_host) >= NI_MAXHOST)
735: fatal("%.200s line %d: Bad forwarding specification.",
736: filename, linenum);
737: if (arg) {
738: fwd.listen_port = a2port(arg);
739: fwd.listen_host = cleanhostname(fwd.listen_host);
740: } else {
741: fwd.listen_port = a2port(fwd.listen_host);
1.143 djm 742: fwd.listen_host = NULL;
1.135 djm 743: }
744: if (fwd.listen_port == 0)
1.71 markus 745: fatal("%.200s line %d: Badly formatted port number.",
746: filename, linenum);
1.87 markus 747: if (*activep)
1.135 djm 748: add_local_forward(options, &fwd);
1.72 markus 749: break;
1.17 markus 750:
1.90 stevesk 751: case oClearAllForwardings:
752: intptr = &options->clear_forwardings;
753: goto parse_flag;
754:
1.17 markus 755: case oHost:
756: *activep = 0;
1.42 provos 757: while ((arg = strdelim(&s)) != NULL && *arg != '\0')
1.38 provos 758: if (match_pattern(host, arg)) {
759: debug("Applying options for %.100s", arg);
1.17 markus 760: *activep = 1;
761: break;
762: }
1.42 provos 763: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 764: return 0;
765:
766: case oEscapeChar:
767: intptr = &options->escape_char;
1.42 provos 768: arg = strdelim(&s);
1.40 ho 769: if (!arg || *arg == '\0')
1.17 markus 770: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 771: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 772: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
773: value = (u_char) arg[1] & 31;
1.38 provos 774: else if (strlen(arg) == 1)
1.51 markus 775: value = (u_char) arg[0];
1.38 provos 776: else if (strcmp(arg, "none") == 0)
1.79 stevesk 777: value = SSH_ESCAPECHAR_NONE;
1.17 markus 778: else {
779: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 780: filename, linenum);
1.17 markus 781: /* NOTREACHED */
782: value = 0; /* Avoid compiler warning. */
783: }
784: if (*activep && *intptr == -1)
785: *intptr = value;
1.112 djm 786: break;
787:
788: case oAddressFamily:
789: arg = strdelim(&s);
1.140 markus 790: if (!arg || *arg == '\0')
791: fatal("%s line %d: missing address family.",
792: filename, linenum);
1.114 djm 793: intptr = &options->address_family;
1.112 djm 794: if (strcasecmp(arg, "inet") == 0)
1.114 djm 795: value = AF_INET;
1.112 djm 796: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 797: value = AF_INET6;
1.112 djm 798: else if (strcasecmp(arg, "any") == 0)
1.114 djm 799: value = AF_UNSPEC;
1.112 djm 800: else
801: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 802: if (*activep && *intptr == -1)
803: *intptr = value;
1.17 markus 804: break;
805:
1.101 markus 806: case oEnableSSHKeysign:
807: intptr = &options->enable_ssh_keysign;
808: goto parse_flag;
809:
1.128 markus 810: case oIdentitiesOnly:
811: intptr = &options->identities_only;
812: goto parse_flag;
813:
1.127 markus 814: case oServerAliveInterval:
815: intptr = &options->server_alive_interval;
816: goto parse_time;
817:
818: case oServerAliveCountMax:
819: intptr = &options->server_alive_count_max;
820: goto parse_int;
821:
1.130 djm 822: case oSendEnv:
823: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
824: if (strchr(arg, '=') != NULL)
825: fatal("%s line %d: Invalid environment name.",
826: filename, linenum);
1.137 djm 827: if (!*activep)
828: continue;
1.130 djm 829: if (options->num_send_env >= MAX_SEND_ENV)
830: fatal("%s line %d: too many send env.",
831: filename, linenum);
832: options->send_env[options->num_send_env++] =
833: xstrdup(arg);
834: }
835: break;
836:
1.132 djm 837: case oControlPath:
838: charptr = &options->control_path;
839: goto parse_string;
840:
841: case oControlMaster:
842: intptr = &options->control_master;
1.141 djm 843: arg = strdelim(&s);
844: if (!arg || *arg == '\0')
845: fatal("%.200s line %d: Missing ControlMaster argument.",
846: filename, linenum);
847: value = 0; /* To avoid compiler warning... */
848: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
849: value = SSHCTL_MASTER_YES;
850: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
851: value = SSHCTL_MASTER_NO;
852: else if (strcmp(arg, "auto") == 0)
853: value = SSHCTL_MASTER_AUTO;
854: else if (strcmp(arg, "ask") == 0)
855: value = SSHCTL_MASTER_ASK;
856: else if (strcmp(arg, "autoask") == 0)
857: value = SSHCTL_MASTER_AUTO_ASK;
858: else
859: fatal("%.200s line %d: Bad ControlMaster argument.",
860: filename, linenum);
861: if (*activep && *intptr == -1)
862: *intptr = value;
863: break;
1.132 djm 864:
1.136 djm 865: case oHashKnownHosts:
866: intptr = &options->hash_known_hosts;
867: goto parse_flag;
868:
1.144 reyk 869: case oTunnel:
870: intptr = &options->tun_open;
1.145 reyk 871: arg = strdelim(&s);
872: if (!arg || *arg == '\0')
873: fatal("%s line %d: Missing yes/point-to-point/"
874: "ethernet/no argument.", filename, linenum);
875: value = 0; /* silence compiler */
876: if (strcasecmp(arg, "ethernet") == 0)
877: value = SSH_TUNMODE_ETHERNET;
878: else if (strcasecmp(arg, "point-to-point") == 0)
879: value = SSH_TUNMODE_POINTOPOINT;
880: else if (strcasecmp(arg, "yes") == 0)
881: value = SSH_TUNMODE_DEFAULT;
882: else if (strcasecmp(arg, "no") == 0)
883: value = SSH_TUNMODE_NO;
884: else
885: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
886: "no argument: %s", filename, linenum, arg);
887: if (*activep)
888: *intptr = value;
889: break;
1.144 reyk 890:
891: case oTunnelDevice:
892: arg = strdelim(&s);
893: if (!arg || *arg == '\0')
894: fatal("%.200s line %d: Missing argument.", filename, linenum);
895: value = a2tun(arg, &value2);
1.145 reyk 896: if (value == SSH_TUNID_ERR)
1.144 reyk 897: fatal("%.200s line %d: Bad tun device.", filename, linenum);
898: if (*activep) {
899: options->tun_local = value;
900: options->tun_remote = value2;
901: }
902: break;
903:
904: case oLocalCommand:
905: charptr = &options->local_command;
906: goto parse_command;
907:
908: case oPermitLocalCommand:
909: intptr = &options->permit_local_command;
910: goto parse_flag;
911:
1.96 markus 912: case oDeprecated:
1.98 markus 913: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 914: filename, linenum, keyword);
1.98 markus 915: return 0;
1.96 markus 916:
1.110 jakob 917: case oUnsupported:
918: error("%s line %d: Unsupported option \"%s\"",
919: filename, linenum, keyword);
920: return 0;
921:
1.17 markus 922: default:
923: fatal("process_config_line: Unimplemented opcode %d", opcode);
924: }
925:
926: /* Check that there is no garbage at end of line. */
1.57 djm 927: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 928: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 929: filename, linenum, arg);
1.39 ho 930: }
1.17 markus 931: return 0;
1.1 deraadt 932: }
933:
934:
1.19 markus 935: /*
936: * Reads the config file and modifies the options accordingly. Options
937: * should already be initialized before this call. This never returns if
1.89 stevesk 938: * there is an error. If the file does not exist, this returns 0.
1.19 markus 939: */
1.1 deraadt 940:
1.89 stevesk 941: int
1.134 deraadt 942: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 943: int checkperm)
1.1 deraadt 944: {
1.17 markus 945: FILE *f;
946: char line[1024];
947: int active, linenum;
948: int bad_options = 0;
949:
950: /* Open the file. */
1.129 djm 951: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 952: return 0;
1.129 djm 953:
954: if (checkperm) {
955: struct stat sb;
1.134 deraadt 956:
1.131 dtucker 957: if (fstat(fileno(f), &sb) == -1)
1.129 djm 958: fatal("fstat %s: %s", filename, strerror(errno));
959: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 960: (sb.st_mode & 022) != 0))
1.129 djm 961: fatal("Bad owner or permissions on %s", filename);
962: }
1.17 markus 963:
964: debug("Reading configuration data %.200s", filename);
965:
1.19 markus 966: /*
967: * Mark that we are now processing the options. This flag is turned
968: * on/off by Host specifications.
969: */
1.17 markus 970: active = 1;
971: linenum = 0;
972: while (fgets(line, sizeof(line), f)) {
973: /* Update line number counter. */
974: linenum++;
975: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
976: bad_options++;
977: }
978: fclose(f);
979: if (bad_options > 0)
1.64 millert 980: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 981: filename, bad_options);
1.89 stevesk 982: return 1;
1.1 deraadt 983: }
984:
1.19 markus 985: /*
986: * Initializes options to special values that indicate that they have not yet
987: * been set. Read_config_file will only set options with this value. Options
988: * are processed in the following order: command line, user config file,
989: * system config file. Last, fill_default_options is called.
990: */
1.1 deraadt 991:
1.26 markus 992: void
1.17 markus 993: initialize_options(Options * options)
1.1 deraadt 994: {
1.17 markus 995: memset(options, 'X', sizeof(*options));
996: options->forward_agent = -1;
997: options->forward_x11 = -1;
1.123 markus 998: options->forward_x11_trusted = -1;
1.153 markus 999: options->exit_on_forward_failure = -1;
1.34 markus 1000: options->xauth_location = NULL;
1.17 markus 1001: options->gateway_ports = -1;
1002: options->use_privileged_port = -1;
1003: options->rsa_authentication = -1;
1.50 markus 1004: options->pubkey_authentication = -1;
1.78 markus 1005: options->challenge_response_authentication = -1;
1.118 markus 1006: options->gss_authentication = -1;
1007: options->gss_deleg_creds = -1;
1.17 markus 1008: options->password_authentication = -1;
1.48 markus 1009: options->kbd_interactive_authentication = -1;
1010: options->kbd_interactive_devices = NULL;
1.17 markus 1011: options->rhosts_rsa_authentication = -1;
1.72 markus 1012: options->hostbased_authentication = -1;
1.17 markus 1013: options->batch_mode = -1;
1014: options->check_host_ip = -1;
1015: options->strict_host_key_checking = -1;
1016: options->compression = -1;
1.126 markus 1017: options->tcp_keep_alive = -1;
1.17 markus 1018: options->compression_level = -1;
1019: options->port = -1;
1.114 djm 1020: options->address_family = -1;
1.17 markus 1021: options->connection_attempts = -1;
1.111 djm 1022: options->connection_timeout = -1;
1.17 markus 1023: options->number_of_password_prompts = -1;
1024: options->cipher = -1;
1.25 markus 1025: options->ciphers = NULL;
1.62 markus 1026: options->macs = NULL;
1.76 markus 1027: options->hostkeyalgorithms = NULL;
1.25 markus 1028: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1029: options->num_identity_files = 0;
1030: options->hostname = NULL;
1.52 markus 1031: options->host_key_alias = NULL;
1.17 markus 1032: options->proxy_command = NULL;
1033: options->user = NULL;
1034: options->escape_char = -1;
1035: options->system_hostfile = NULL;
1036: options->user_hostfile = NULL;
1.27 markus 1037: options->system_hostfile2 = NULL;
1038: options->user_hostfile2 = NULL;
1.17 markus 1039: options->num_local_forwards = 0;
1040: options->num_remote_forwards = 0;
1.90 stevesk 1041: options->clear_forwardings = -1;
1.95 markus 1042: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1043: options->preferred_authentications = NULL;
1.77 markus 1044: options->bind_address = NULL;
1.86 markus 1045: options->smartcard_device = NULL;
1.101 markus 1046: options->enable_ssh_keysign = - 1;
1.91 markus 1047: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1048: options->identities_only = - 1;
1.105 markus 1049: options->rekey_limit = - 1;
1.107 jakob 1050: options->verify_host_key_dns = -1;
1.127 markus 1051: options->server_alive_interval = -1;
1052: options->server_alive_count_max = -1;
1.130 djm 1053: options->num_send_env = 0;
1.132 djm 1054: options->control_path = NULL;
1055: options->control_master = -1;
1.136 djm 1056: options->hash_known_hosts = -1;
1.144 reyk 1057: options->tun_open = -1;
1058: options->tun_local = -1;
1059: options->tun_remote = -1;
1060: options->local_command = NULL;
1061: options->permit_local_command = -1;
1.1 deraadt 1062: }
1063:
1.19 markus 1064: /*
1065: * Called after processing other sources of option data, this fills those
1066: * options for which no value has been specified with their default values.
1067: */
1.1 deraadt 1068:
1.26 markus 1069: void
1.17 markus 1070: fill_default_options(Options * options)
1.1 deraadt 1071: {
1.61 deraadt 1072: int len;
1073:
1.17 markus 1074: if (options->forward_agent == -1)
1.33 markus 1075: options->forward_agent = 0;
1.17 markus 1076: if (options->forward_x11 == -1)
1.23 markus 1077: options->forward_x11 = 0;
1.123 markus 1078: if (options->forward_x11_trusted == -1)
1079: options->forward_x11_trusted = 0;
1.153 markus 1080: if (options->exit_on_forward_failure == -1)
1081: options->exit_on_forward_failure = 0;
1.34 markus 1082: if (options->xauth_location == NULL)
1.80 markus 1083: options->xauth_location = _PATH_XAUTH;
1.17 markus 1084: if (options->gateway_ports == -1)
1085: options->gateway_ports = 0;
1086: if (options->use_privileged_port == -1)
1.65 markus 1087: options->use_privileged_port = 0;
1.17 markus 1088: if (options->rsa_authentication == -1)
1089: options->rsa_authentication = 1;
1.50 markus 1090: if (options->pubkey_authentication == -1)
1091: options->pubkey_authentication = 1;
1.78 markus 1092: if (options->challenge_response_authentication == -1)
1.83 markus 1093: options->challenge_response_authentication = 1;
1.118 markus 1094: if (options->gss_authentication == -1)
1.122 markus 1095: options->gss_authentication = 0;
1.118 markus 1096: if (options->gss_deleg_creds == -1)
1097: options->gss_deleg_creds = 0;
1.17 markus 1098: if (options->password_authentication == -1)
1099: options->password_authentication = 1;
1.48 markus 1100: if (options->kbd_interactive_authentication == -1)
1.59 markus 1101: options->kbd_interactive_authentication = 1;
1.17 markus 1102: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1103: options->rhosts_rsa_authentication = 0;
1.72 markus 1104: if (options->hostbased_authentication == -1)
1105: options->hostbased_authentication = 0;
1.17 markus 1106: if (options->batch_mode == -1)
1107: options->batch_mode = 0;
1108: if (options->check_host_ip == -1)
1109: options->check_host_ip = 1;
1110: if (options->strict_host_key_checking == -1)
1111: options->strict_host_key_checking = 2; /* 2 is default */
1112: if (options->compression == -1)
1113: options->compression = 0;
1.126 markus 1114: if (options->tcp_keep_alive == -1)
1115: options->tcp_keep_alive = 1;
1.17 markus 1116: if (options->compression_level == -1)
1117: options->compression_level = 6;
1118: if (options->port == -1)
1119: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1120: if (options->address_family == -1)
1121: options->address_family = AF_UNSPEC;
1.17 markus 1122: if (options->connection_attempts == -1)
1.84 markus 1123: options->connection_attempts = 1;
1.17 markus 1124: if (options->number_of_password_prompts == -1)
1125: options->number_of_password_prompts = 3;
1126: /* Selected in ssh_login(). */
1127: if (options->cipher == -1)
1128: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1129: /* options->ciphers, default set in myproposals.h */
1.62 markus 1130: /* options->macs, default set in myproposals.h */
1.76 markus 1131: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1132: if (options->protocol == SSH_PROTO_UNKNOWN)
1.69 markus 1133: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
1.17 markus 1134: if (options->num_identity_files == 0) {
1.50 markus 1135: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1136: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1137: options->identity_files[options->num_identity_files] =
1.61 deraadt 1138: xmalloc(len);
1139: snprintf(options->identity_files[options->num_identity_files++],
1140: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1141: }
1142: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1143: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1144: options->identity_files[options->num_identity_files] =
1145: xmalloc(len);
1146: snprintf(options->identity_files[options->num_identity_files++],
1147: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1148:
1.61 deraadt 1149: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1150: options->identity_files[options->num_identity_files] =
1.61 deraadt 1151: xmalloc(len);
1152: snprintf(options->identity_files[options->num_identity_files++],
1153: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.50 markus 1154: }
1.27 markus 1155: }
1.17 markus 1156: if (options->escape_char == -1)
1157: options->escape_char = '~';
1158: if (options->system_hostfile == NULL)
1.55 markus 1159: options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
1.17 markus 1160: if (options->user_hostfile == NULL)
1.55 markus 1161: options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
1.27 markus 1162: if (options->system_hostfile2 == NULL)
1.55 markus 1163: options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
1.27 markus 1164: if (options->user_hostfile2 == NULL)
1.55 markus 1165: options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
1.95 markus 1166: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1167: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1168: if (options->clear_forwardings == 1)
1169: clear_forwardings(options);
1.91 markus 1170: if (options->no_host_authentication_for_localhost == - 1)
1171: options->no_host_authentication_for_localhost = 0;
1.128 markus 1172: if (options->identities_only == -1)
1173: options->identities_only = 0;
1.101 markus 1174: if (options->enable_ssh_keysign == -1)
1175: options->enable_ssh_keysign = 0;
1.105 markus 1176: if (options->rekey_limit == -1)
1177: options->rekey_limit = 0;
1.107 jakob 1178: if (options->verify_host_key_dns == -1)
1179: options->verify_host_key_dns = 0;
1.127 markus 1180: if (options->server_alive_interval == -1)
1181: options->server_alive_interval = 0;
1182: if (options->server_alive_count_max == -1)
1183: options->server_alive_count_max = 3;
1.132 djm 1184: if (options->control_master == -1)
1185: options->control_master = 0;
1.136 djm 1186: if (options->hash_known_hosts == -1)
1187: options->hash_known_hosts = 0;
1.144 reyk 1188: if (options->tun_open == -1)
1.145 reyk 1189: options->tun_open = SSH_TUNMODE_NO;
1190: if (options->tun_local == -1)
1191: options->tun_local = SSH_TUNID_ANY;
1192: if (options->tun_remote == -1)
1193: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1194: if (options->permit_local_command == -1)
1195: options->permit_local_command = 0;
1196: /* options->local_command should not be set by default */
1.17 markus 1197: /* options->proxy_command should not be set by default */
1198: /* options->user will be set in the main program if appropriate */
1199: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1200: /* options->host_key_alias should not be set by default */
1.67 markus 1201: /* options->preferred_authentications will be set in ssh */
1.135 djm 1202: }
1203:
1204: /*
1205: * parse_forward
1206: * parses a string containing a port forwarding specification of the form:
1207: * [listenhost:]listenport:connecthost:connectport
1208: * returns number of arguments parsed or zero on error
1209: */
1210: int
1211: parse_forward(Forward *fwd, const char *fwdspec)
1212: {
1213: int i;
1214: char *p, *cp, *fwdarg[4];
1215:
1216: memset(fwd, '\0', sizeof(*fwd));
1217:
1218: cp = p = xstrdup(fwdspec);
1219:
1220: /* skip leading spaces */
1221: while (*cp && isspace(*cp))
1222: cp++;
1223:
1224: for (i = 0; i < 4; ++i)
1225: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1226: break;
1227:
1228: /* Check for trailing garbage in 4-arg case*/
1229: if (cp != NULL)
1230: i = 0; /* failure */
1231:
1232: switch (i) {
1233: case 3:
1234: fwd->listen_host = NULL;
1235: fwd->listen_port = a2port(fwdarg[0]);
1236: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1237: fwd->connect_port = a2port(fwdarg[2]);
1238: break;
1239:
1240: case 4:
1241: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1242: fwd->listen_port = a2port(fwdarg[1]);
1243: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1244: fwd->connect_port = a2port(fwdarg[3]);
1245: break;
1246: default:
1247: i = 0; /* failure */
1248: }
1249:
1250: xfree(p);
1251:
1252: if (fwd->listen_port == 0 && fwd->connect_port == 0)
1253: goto fail_free;
1254:
1255: if (fwd->connect_host != NULL &&
1256: strlen(fwd->connect_host) >= NI_MAXHOST)
1257: goto fail_free;
1258:
1259: return (i);
1260:
1261: fail_free:
1262: if (fwd->connect_host != NULL)
1263: xfree(fwd->connect_host);
1264: if (fwd->listen_host != NULL)
1265: xfree(fwd->listen_host);
1266: return (0);
1.1 deraadt 1267: }
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