Annotation of src/usr.bin/ssh/readconf.c, Revision 1.143.2.1
1.1 deraadt 1: /*
1.18 deraadt 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
5: * Functions for reading the configuration files.
1.26 markus 6: *
1.46 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 12: */
1.1 deraadt 13:
14: #include "includes.h"
1.143.2.1! brad 15: RCSID("$OpenBSD: readconf.c,v 1.145 2005/12/08 18:34:11 reyk Exp $");
1.1 deraadt 16:
17: #include "ssh.h"
18: #include "xmalloc.h"
1.25 markus 19: #include "compat.h"
1.58 markus 20: #include "cipher.h"
1.55 markus 21: #include "pathnames.h"
1.58 markus 22: #include "log.h"
23: #include "readconf.h"
24: #include "match.h"
25: #include "misc.h"
1.62 markus 26: #include "kex.h"
27: #include "mac.h"
1.1 deraadt 28:
29: /* Format of the configuration file:
30:
31: # Configuration data is parsed as follows:
32: # 1. command line options
33: # 2. user-specific file
34: # 3. system-wide file
35: # Any configuration value is only changed the first time it is set.
36: # Thus, host-specific definitions should be at the beginning of the
37: # configuration file, and defaults at the end.
38:
39: # Host-specific declarations. These may override anything above. A single
40: # host may match multiple declarations; these are processed in the order
41: # that they are given in.
42:
43: Host *.ngs.fi ngs.fi
1.96 markus 44: User foo
1.1 deraadt 45:
46: Host fake.com
47: HostName another.host.name.real.org
48: User blaah
49: Port 34289
50: ForwardX11 no
51: ForwardAgent no
52:
53: Host books.com
54: RemoteForward 9999 shadows.cs.hut.fi:9999
55: Cipher 3des
56:
57: Host fascist.blob.com
58: Port 23123
59: User tylonen
60: PasswordAuthentication no
61:
62: Host puukko.hut.fi
63: User t35124p
64: ProxyCommand ssh-proxy %h %p
65:
66: Host *.fr
1.96 markus 67: PublicKeyAuthentication no
1.1 deraadt 68:
69: Host *.su
70: Cipher none
71: PasswordAuthentication no
72:
1.143.2.1! brad 73: Host vpn.fake.com
! 74: Tunnel yes
! 75: TunnelDevice 3
! 76:
1.1 deraadt 77: # Defaults for various options
78: Host *
79: ForwardAgent no
1.50 markus 80: ForwardX11 no
1.1 deraadt 81: PasswordAuthentication yes
82: RSAAuthentication yes
83: RhostsRSAAuthentication yes
84: StrictHostKeyChecking yes
1.126 markus 85: TcpKeepAlive no
1.1 deraadt 86: IdentityFile ~/.ssh/identity
87: Port 22
88: EscapeChar ~
89:
90: */
91:
92: /* Keyword tokens. */
93:
1.17 markus 94: typedef enum {
95: oBadOption,
1.123 markus 96: oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts,
1.100 deraadt 97: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 98: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 99: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
100: oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
101: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
102: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 103: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 104: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 105: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 106: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 107: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.90 stevesk 108: oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
1.96 markus 109: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 110: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 111: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 112: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.136 djm 113: oSendEnv, oControlPath, oControlMaster, oHashKnownHosts,
1.143.2.1! brad 114: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.110 jakob 115: oDeprecated, oUnsupported
1.1 deraadt 116: } OpCodes;
117:
118: /* Textual representations of the tokens. */
119:
1.17 markus 120: static struct {
121: const char *name;
122: OpCodes opcode;
123: } keywords[] = {
124: { "forwardagent", oForwardAgent },
125: { "forwardx11", oForwardX11 },
1.123 markus 126: { "forwardx11trusted", oForwardX11Trusted },
1.34 markus 127: { "xauthlocation", oXAuthLocation },
1.17 markus 128: { "gatewayports", oGatewayPorts },
129: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 130: { "rhostsauthentication", oDeprecated },
1.17 markus 131: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 132: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
133: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 134: { "rsaauthentication", oRSAAuthentication },
1.50 markus 135: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 136: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 137: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 138: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 139: { "challengeresponseauthentication", oChallengeResponseAuthentication },
140: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
141: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 142: { "kerberosauthentication", oUnsupported },
143: { "kerberostgtpassing", oUnsupported },
144: { "afstokenpassing", oUnsupported },
1.118 markus 145: #if defined(GSSAPI)
146: { "gssapiauthentication", oGssAuthentication },
147: { "gssapidelegatecredentials", oGssDelegateCreds },
148: #else
149: { "gssapiauthentication", oUnsupported },
150: { "gssapidelegatecredentials", oUnsupported },
151: #endif
1.96 markus 152: { "fallbacktorsh", oDeprecated },
153: { "usersh", oDeprecated },
1.17 markus 154: { "identityfile", oIdentityFile },
1.50 markus 155: { "identityfile2", oIdentityFile }, /* alias */
1.128 markus 156: { "identitiesonly", oIdentitiesOnly },
1.17 markus 157: { "hostname", oHostName },
1.52 markus 158: { "hostkeyalias", oHostKeyAlias },
1.17 markus 159: { "proxycommand", oProxyCommand },
160: { "port", oPort },
161: { "cipher", oCipher },
1.25 markus 162: { "ciphers", oCiphers },
1.62 markus 163: { "macs", oMacs },
1.25 markus 164: { "protocol", oProtocol },
1.17 markus 165: { "remoteforward", oRemoteForward },
166: { "localforward", oLocalForward },
167: { "user", oUser },
168: { "host", oHost },
169: { "escapechar", oEscapeChar },
170: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.81 markus 171: { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */
1.27 markus 172: { "globalknownhostsfile2", oGlobalKnownHostsFile2 },
1.81 markus 173: { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
1.17 markus 174: { "connectionattempts", oConnectionAttempts },
175: { "batchmode", oBatchMode },
176: { "checkhostip", oCheckHostIP },
177: { "stricthostkeychecking", oStrictHostKeyChecking },
178: { "compression", oCompression },
179: { "compressionlevel", oCompressionLevel },
1.126 markus 180: { "tcpkeepalive", oTCPKeepAlive },
181: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 182: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
183: { "loglevel", oLogLevel },
1.71 markus 184: { "dynamicforward", oDynamicForward },
1.67 markus 185: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 186: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 187: { "bindaddress", oBindAddress },
1.110 jakob 188: #ifdef SMARTCARD
1.85 jakob 189: { "smartcarddevice", oSmartcardDevice },
1.110 jakob 190: #else
191: { "smartcarddevice", oUnsupported },
192: #endif
1.93 deraadt 193: { "clearallforwardings", oClearAllForwardings },
1.101 markus 194: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 195: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 196: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 197: { "rekeylimit", oRekeyLimit },
1.111 djm 198: { "connecttimeout", oConnectTimeout },
1.112 djm 199: { "addressfamily", oAddressFamily },
1.127 markus 200: { "serveraliveinterval", oServerAliveInterval },
201: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 202: { "sendenv", oSendEnv },
1.132 djm 203: { "controlpath", oControlPath },
204: { "controlmaster", oControlMaster },
1.136 djm 205: { "hashknownhosts", oHashKnownHosts },
1.143.2.1! brad 206: { "tunnel", oTunnel },
! 207: { "tunneldevice", oTunnelDevice },
! 208: { "localcommand", oLocalCommand },
! 209: { "permitlocalcommand", oPermitLocalCommand },
1.92 stevesk 210: { NULL, oBadOption }
1.13 markus 211: };
212:
1.19 markus 213: /*
214: * Adds a local TCP/IP port forward to options. Never returns if there is an
215: * error.
216: */
1.1 deraadt 217:
1.26 markus 218: void
1.135 djm 219: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 220: {
1.17 markus 221: Forward *fwd;
222: extern uid_t original_real_uid;
1.135 djm 223: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 224: fatal("Privileged ports can only be forwarded by root.");
1.17 markus 225: if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
226: fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
227: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 228:
229: fwd->listen_host = (newfwd->listen_host == NULL) ?
230: NULL : xstrdup(newfwd->listen_host);
231: fwd->listen_port = newfwd->listen_port;
232: fwd->connect_host = xstrdup(newfwd->connect_host);
233: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 234: }
235:
1.19 markus 236: /*
237: * Adds a remote TCP/IP port forward to options. Never returns if there is
238: * an error.
239: */
1.1 deraadt 240:
1.26 markus 241: void
1.135 djm 242: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 243: {
1.17 markus 244: Forward *fwd;
245: if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
246: fatal("Too many remote forwards (max %d).",
1.93 deraadt 247: SSH_MAX_FORWARDS_PER_DIRECTION);
1.17 markus 248: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 249:
250: fwd->listen_host = (newfwd->listen_host == NULL) ?
251: NULL : xstrdup(newfwd->listen_host);
252: fwd->listen_port = newfwd->listen_port;
253: fwd->connect_host = xstrdup(newfwd->connect_host);
254: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 255: }
256:
1.90 stevesk 257: static void
258: clear_forwardings(Options *options)
259: {
260: int i;
261:
1.135 djm 262: for (i = 0; i < options->num_local_forwards; i++) {
1.138 dtucker 263: if (options->local_forwards[i].listen_host != NULL)
264: xfree(options->local_forwards[i].listen_host);
1.135 djm 265: xfree(options->local_forwards[i].connect_host);
266: }
1.90 stevesk 267: options->num_local_forwards = 0;
1.135 djm 268: for (i = 0; i < options->num_remote_forwards; i++) {
1.138 dtucker 269: if (options->remote_forwards[i].listen_host != NULL)
270: xfree(options->remote_forwards[i].listen_host);
1.135 djm 271: xfree(options->remote_forwards[i].connect_host);
272: }
1.90 stevesk 273: options->num_remote_forwards = 0;
1.143.2.1! brad 274: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 275: }
276:
1.19 markus 277: /*
1.70 stevesk 278: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 279: */
1.1 deraadt 280:
1.26 markus 281: static OpCodes
1.17 markus 282: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 283: {
1.51 markus 284: u_int i;
1.1 deraadt 285:
1.17 markus 286: for (i = 0; keywords[i].name; i++)
1.20 markus 287: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 288: return keywords[i].opcode;
289:
1.75 stevesk 290: error("%s: line %d: Bad configuration option: %s",
291: filename, linenum, cp);
1.17 markus 292: return oBadOption;
1.1 deraadt 293: }
294:
1.19 markus 295: /*
296: * Processes a single option line as used in the configuration files. This
297: * only sets those values that have not already been set.
298: */
1.102 markus 299: #define WHITESPACE " \t\r\n"
1.1 deraadt 300:
1.14 markus 301: int
302: process_config_line(Options *options, const char *host,
1.17 markus 303: char *line, const char *filename, int linenum,
304: int *activep)
1.1 deraadt 305: {
1.135 djm 306: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
1.143.2.1! brad 307: int opcode, *intptr, value, value2;
1.102 markus 308: size_t len;
1.135 djm 309: Forward fwd;
1.106 djm 310:
311: /* Strip trailing whitespace */
1.139 deraadt 312: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 313: if (strchr(WHITESPACE, line[len]) == NULL)
314: break;
315: line[len] = '\0';
316: }
1.1 deraadt 317:
1.42 provos 318: s = line;
319: /* Get the keyword. (Each line is supposed to begin with a keyword). */
320: keyword = strdelim(&s);
321: /* Ignore leading whitespace. */
322: if (*keyword == '\0')
1.43 markus 323: keyword = strdelim(&s);
1.56 deraadt 324: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 325: return 0;
326:
1.38 provos 327: opcode = parse_token(keyword, filename, linenum);
1.17 markus 328:
329: switch (opcode) {
330: case oBadOption:
1.19 markus 331: /* don't panic, but count bad options */
332: return -1;
1.17 markus 333: /* NOTREACHED */
1.111 djm 334: case oConnectTimeout:
335: intptr = &options->connection_timeout;
1.127 markus 336: parse_time:
1.111 djm 337: arg = strdelim(&s);
338: if (!arg || *arg == '\0')
339: fatal("%s line %d: missing time value.",
340: filename, linenum);
341: if ((value = convtime(arg)) == -1)
342: fatal("%s line %d: invalid time value.",
343: filename, linenum);
344: if (*intptr == -1)
345: *intptr = value;
346: break;
347:
1.17 markus 348: case oForwardAgent:
349: intptr = &options->forward_agent;
350: parse_flag:
1.42 provos 351: arg = strdelim(&s);
1.40 ho 352: if (!arg || *arg == '\0')
1.17 markus 353: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
354: value = 0; /* To avoid compiler warning... */
1.38 provos 355: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 356: value = 1;
1.38 provos 357: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 358: value = 0;
359: else
360: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
361: if (*activep && *intptr == -1)
362: *intptr = value;
363: break;
364:
365: case oForwardX11:
366: intptr = &options->forward_x11;
367: goto parse_flag;
368:
1.123 markus 369: case oForwardX11Trusted:
370: intptr = &options->forward_x11_trusted;
371: goto parse_flag;
372:
1.17 markus 373: case oGatewayPorts:
374: intptr = &options->gateway_ports;
375: goto parse_flag;
376:
377: case oUsePrivilegedPort:
378: intptr = &options->use_privileged_port;
379: goto parse_flag;
380:
381: case oPasswordAuthentication:
382: intptr = &options->password_authentication;
383: goto parse_flag;
384:
1.48 markus 385: case oKbdInteractiveAuthentication:
386: intptr = &options->kbd_interactive_authentication;
387: goto parse_flag;
388:
389: case oKbdInteractiveDevices:
390: charptr = &options->kbd_interactive_devices;
391: goto parse_string;
392:
1.50 markus 393: case oPubkeyAuthentication:
394: intptr = &options->pubkey_authentication;
1.30 markus 395: goto parse_flag;
396:
1.17 markus 397: case oRSAAuthentication:
398: intptr = &options->rsa_authentication;
399: goto parse_flag;
400:
401: case oRhostsRSAAuthentication:
402: intptr = &options->rhosts_rsa_authentication;
403: goto parse_flag;
404:
1.72 markus 405: case oHostbasedAuthentication:
406: intptr = &options->hostbased_authentication;
407: goto parse_flag;
408:
1.59 markus 409: case oChallengeResponseAuthentication:
1.78 markus 410: intptr = &options->challenge_response_authentication;
1.17 markus 411: goto parse_flag;
1.108 jakob 412:
1.118 markus 413: case oGssAuthentication:
414: intptr = &options->gss_authentication;
415: goto parse_flag;
416:
417: case oGssDelegateCreds:
418: intptr = &options->gss_deleg_creds;
419: goto parse_flag;
420:
1.17 markus 421: case oBatchMode:
422: intptr = &options->batch_mode;
423: goto parse_flag;
424:
425: case oCheckHostIP:
426: intptr = &options->check_host_ip;
427: goto parse_flag;
428:
1.107 jakob 429: case oVerifyHostKeyDNS:
430: intptr = &options->verify_host_key_dns;
1.125 jakob 431: goto parse_yesnoask;
1.107 jakob 432:
1.17 markus 433: case oStrictHostKeyChecking:
434: intptr = &options->strict_host_key_checking;
1.125 jakob 435: parse_yesnoask:
1.42 provos 436: arg = strdelim(&s);
1.40 ho 437: if (!arg || *arg == '\0')
1.60 stevesk 438: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 439: filename, linenum);
1.17 markus 440: value = 0; /* To avoid compiler warning... */
1.38 provos 441: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 442: value = 1;
1.38 provos 443: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 444: value = 0;
1.38 provos 445: else if (strcmp(arg, "ask") == 0)
1.17 markus 446: value = 2;
447: else
448: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
449: if (*activep && *intptr == -1)
450: *intptr = value;
451: break;
452:
453: case oCompression:
454: intptr = &options->compression;
455: goto parse_flag;
456:
1.126 markus 457: case oTCPKeepAlive:
458: intptr = &options->tcp_keep_alive;
1.17 markus 459: goto parse_flag;
460:
1.91 markus 461: case oNoHostAuthenticationForLocalhost:
462: intptr = &options->no_host_authentication_for_localhost;
463: goto parse_flag;
464:
1.17 markus 465: case oNumberOfPasswordPrompts:
466: intptr = &options->number_of_password_prompts;
467: goto parse_int;
468:
469: case oCompressionLevel:
470: intptr = &options->compression_level;
471: goto parse_int;
472:
1.105 markus 473: case oRekeyLimit:
474: intptr = &options->rekey_limit;
475: arg = strdelim(&s);
476: if (!arg || *arg == '\0')
477: fatal("%.200s line %d: Missing argument.", filename, linenum);
478: if (arg[0] < '0' || arg[0] > '9')
479: fatal("%.200s line %d: Bad number.", filename, linenum);
480: value = strtol(arg, &endofnumber, 10);
481: if (arg == endofnumber)
482: fatal("%.200s line %d: Bad number.", filename, linenum);
483: switch (toupper(*endofnumber)) {
484: case 'K':
485: value *= 1<<10;
486: break;
487: case 'M':
488: value *= 1<<20;
489: break;
490: case 'G':
491: value *= 1<<30;
492: break;
493: }
494: if (*activep && *intptr == -1)
495: *intptr = value;
496: break;
497:
1.17 markus 498: case oIdentityFile:
1.42 provos 499: arg = strdelim(&s);
1.40 ho 500: if (!arg || *arg == '\0')
1.17 markus 501: fatal("%.200s line %d: Missing argument.", filename, linenum);
502: if (*activep) {
1.50 markus 503: intptr = &options->num_identity_files;
1.27 markus 504: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 505: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 506: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.50 markus 507: charptr = &options->identity_files[*intptr];
1.38 provos 508: *charptr = xstrdup(arg);
1.27 markus 509: *intptr = *intptr + 1;
1.17 markus 510: }
511: break;
512:
1.34 markus 513: case oXAuthLocation:
514: charptr=&options->xauth_location;
515: goto parse_string;
516:
1.17 markus 517: case oUser:
518: charptr = &options->user;
519: parse_string:
1.42 provos 520: arg = strdelim(&s);
1.40 ho 521: if (!arg || *arg == '\0')
1.17 markus 522: fatal("%.200s line %d: Missing argument.", filename, linenum);
523: if (*activep && *charptr == NULL)
1.38 provos 524: *charptr = xstrdup(arg);
1.17 markus 525: break;
526:
527: case oGlobalKnownHostsFile:
528: charptr = &options->system_hostfile;
529: goto parse_string;
530:
531: case oUserKnownHostsFile:
532: charptr = &options->user_hostfile;
533: goto parse_string;
534:
1.27 markus 535: case oGlobalKnownHostsFile2:
536: charptr = &options->system_hostfile2;
537: goto parse_string;
538:
539: case oUserKnownHostsFile2:
540: charptr = &options->user_hostfile2;
541: goto parse_string;
542:
1.17 markus 543: case oHostName:
544: charptr = &options->hostname;
545: goto parse_string;
546:
1.52 markus 547: case oHostKeyAlias:
548: charptr = &options->host_key_alias;
549: goto parse_string;
550:
1.67 markus 551: case oPreferredAuthentications:
552: charptr = &options->preferred_authentications;
553: goto parse_string;
554:
1.77 markus 555: case oBindAddress:
556: charptr = &options->bind_address;
557: goto parse_string;
558:
1.85 jakob 559: case oSmartcardDevice:
1.86 markus 560: charptr = &options->smartcard_device;
561: goto parse_string;
1.85 jakob 562:
1.17 markus 563: case oProxyCommand:
1.143.2.1! brad 564: charptr = &options->proxy_command;
! 565: parse_command:
1.113 markus 566: if (s == NULL)
567: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 568: len = strspn(s, WHITESPACE "=");
1.17 markus 569: if (*activep && *charptr == NULL)
1.102 markus 570: *charptr = xstrdup(s + len);
1.17 markus 571: return 0;
572:
573: case oPort:
574: intptr = &options->port;
575: parse_int:
1.42 provos 576: arg = strdelim(&s);
1.40 ho 577: if (!arg || *arg == '\0')
1.17 markus 578: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 579: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 580: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 581:
582: /* Octal, decimal, or hex format? */
1.38 provos 583: value = strtol(arg, &endofnumber, 0);
584: if (arg == endofnumber)
1.21 markus 585: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 586: if (*activep && *intptr == -1)
587: *intptr = value;
588: break;
589:
590: case oConnectionAttempts:
591: intptr = &options->connection_attempts;
592: goto parse_int;
593:
594: case oCipher:
595: intptr = &options->cipher;
1.42 provos 596: arg = strdelim(&s);
1.40 ho 597: if (!arg || *arg == '\0')
1.32 markus 598: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 599: value = cipher_number(arg);
1.17 markus 600: if (value == -1)
601: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 602: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 603: if (*activep && *intptr == -1)
604: *intptr = value;
605: break;
606:
1.25 markus 607: case oCiphers:
1.42 provos 608: arg = strdelim(&s);
1.40 ho 609: if (!arg || *arg == '\0')
1.32 markus 610: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 611: if (!ciphers_valid(arg))
1.31 markus 612: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 613: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 614: if (*activep && options->ciphers == NULL)
1.38 provos 615: options->ciphers = xstrdup(arg);
1.25 markus 616: break;
617:
1.62 markus 618: case oMacs:
619: arg = strdelim(&s);
620: if (!arg || *arg == '\0')
621: fatal("%.200s line %d: Missing argument.", filename, linenum);
622: if (!mac_valid(arg))
623: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 624: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 625: if (*activep && options->macs == NULL)
626: options->macs = xstrdup(arg);
627: break;
628:
1.76 markus 629: case oHostKeyAlgorithms:
630: arg = strdelim(&s);
631: if (!arg || *arg == '\0')
632: fatal("%.200s line %d: Missing argument.", filename, linenum);
633: if (!key_names_valid2(arg))
634: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 635: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 636: if (*activep && options->hostkeyalgorithms == NULL)
637: options->hostkeyalgorithms = xstrdup(arg);
638: break;
639:
1.25 markus 640: case oProtocol:
641: intptr = &options->protocol;
1.42 provos 642: arg = strdelim(&s);
1.40 ho 643: if (!arg || *arg == '\0')
1.32 markus 644: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 645: value = proto_spec(arg);
1.25 markus 646: if (value == SSH_PROTO_UNKNOWN)
647: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 648: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 649: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
650: *intptr = value;
651: break;
652:
1.17 markus 653: case oLogLevel:
654: intptr = (int *) &options->log_level;
1.42 provos 655: arg = strdelim(&s);
1.38 provos 656: value = log_level_number(arg);
1.95 markus 657: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 658: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 659: filename, linenum, arg ? arg : "<NONE>");
1.95 markus 660: if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET)
1.17 markus 661: *intptr = (LogLevel) value;
662: break;
663:
1.88 stevesk 664: case oLocalForward:
1.17 markus 665: case oRemoteForward:
1.42 provos 666: arg = strdelim(&s);
1.135 djm 667: if (arg == NULL || *arg == '\0')
1.88 stevesk 668: fatal("%.200s line %d: Missing port argument.",
669: filename, linenum);
1.135 djm 670: arg2 = strdelim(&s);
671: if (arg2 == NULL || *arg2 == '\0')
672: fatal("%.200s line %d: Missing target argument.",
1.88 stevesk 673: filename, linenum);
1.135 djm 674:
675: /* construct a string for parse_forward */
676: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
677:
678: if (parse_forward(&fwd, fwdarg) == 0)
1.88 stevesk 679: fatal("%.200s line %d: Bad forwarding specification.",
680: filename, linenum);
1.135 djm 681:
1.88 stevesk 682: if (*activep) {
683: if (opcode == oLocalForward)
1.135 djm 684: add_local_forward(options, &fwd);
1.88 stevesk 685: else if (opcode == oRemoteForward)
1.135 djm 686: add_remote_forward(options, &fwd);
1.88 stevesk 687: }
1.17 markus 688: break;
1.71 markus 689:
690: case oDynamicForward:
691: arg = strdelim(&s);
692: if (!arg || *arg == '\0')
693: fatal("%.200s line %d: Missing port argument.",
694: filename, linenum);
1.135 djm 695: memset(&fwd, '\0', sizeof(fwd));
696: fwd.connect_host = "socks";
697: fwd.listen_host = hpdelim(&arg);
698: if (fwd.listen_host == NULL ||
699: strlen(fwd.listen_host) >= NI_MAXHOST)
700: fatal("%.200s line %d: Bad forwarding specification.",
701: filename, linenum);
702: if (arg) {
703: fwd.listen_port = a2port(arg);
704: fwd.listen_host = cleanhostname(fwd.listen_host);
705: } else {
706: fwd.listen_port = a2port(fwd.listen_host);
1.143 djm 707: fwd.listen_host = NULL;
1.135 djm 708: }
709: if (fwd.listen_port == 0)
1.71 markus 710: fatal("%.200s line %d: Badly formatted port number.",
711: filename, linenum);
1.87 markus 712: if (*activep)
1.135 djm 713: add_local_forward(options, &fwd);
1.72 markus 714: break;
1.17 markus 715:
1.90 stevesk 716: case oClearAllForwardings:
717: intptr = &options->clear_forwardings;
718: goto parse_flag;
719:
1.17 markus 720: case oHost:
721: *activep = 0;
1.42 provos 722: while ((arg = strdelim(&s)) != NULL && *arg != '\0')
1.38 provos 723: if (match_pattern(host, arg)) {
724: debug("Applying options for %.100s", arg);
1.17 markus 725: *activep = 1;
726: break;
727: }
1.42 provos 728: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 729: return 0;
730:
731: case oEscapeChar:
732: intptr = &options->escape_char;
1.42 provos 733: arg = strdelim(&s);
1.40 ho 734: if (!arg || *arg == '\0')
1.17 markus 735: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 736: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 737: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
738: value = (u_char) arg[1] & 31;
1.38 provos 739: else if (strlen(arg) == 1)
1.51 markus 740: value = (u_char) arg[0];
1.38 provos 741: else if (strcmp(arg, "none") == 0)
1.79 stevesk 742: value = SSH_ESCAPECHAR_NONE;
1.17 markus 743: else {
744: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 745: filename, linenum);
1.17 markus 746: /* NOTREACHED */
747: value = 0; /* Avoid compiler warning. */
748: }
749: if (*activep && *intptr == -1)
750: *intptr = value;
1.112 djm 751: break;
752:
753: case oAddressFamily:
754: arg = strdelim(&s);
1.140 markus 755: if (!arg || *arg == '\0')
756: fatal("%s line %d: missing address family.",
757: filename, linenum);
1.114 djm 758: intptr = &options->address_family;
1.112 djm 759: if (strcasecmp(arg, "inet") == 0)
1.114 djm 760: value = AF_INET;
1.112 djm 761: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 762: value = AF_INET6;
1.112 djm 763: else if (strcasecmp(arg, "any") == 0)
1.114 djm 764: value = AF_UNSPEC;
1.112 djm 765: else
766: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 767: if (*activep && *intptr == -1)
768: *intptr = value;
1.17 markus 769: break;
770:
1.101 markus 771: case oEnableSSHKeysign:
772: intptr = &options->enable_ssh_keysign;
773: goto parse_flag;
774:
1.128 markus 775: case oIdentitiesOnly:
776: intptr = &options->identities_only;
777: goto parse_flag;
778:
1.127 markus 779: case oServerAliveInterval:
780: intptr = &options->server_alive_interval;
781: goto parse_time;
782:
783: case oServerAliveCountMax:
784: intptr = &options->server_alive_count_max;
785: goto parse_int;
786:
1.130 djm 787: case oSendEnv:
788: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
789: if (strchr(arg, '=') != NULL)
790: fatal("%s line %d: Invalid environment name.",
791: filename, linenum);
1.137 djm 792: if (!*activep)
793: continue;
1.130 djm 794: if (options->num_send_env >= MAX_SEND_ENV)
795: fatal("%s line %d: too many send env.",
796: filename, linenum);
797: options->send_env[options->num_send_env++] =
798: xstrdup(arg);
799: }
800: break;
801:
1.132 djm 802: case oControlPath:
803: charptr = &options->control_path;
804: goto parse_string;
805:
806: case oControlMaster:
807: intptr = &options->control_master;
1.141 djm 808: arg = strdelim(&s);
809: if (!arg || *arg == '\0')
810: fatal("%.200s line %d: Missing ControlMaster argument.",
811: filename, linenum);
812: value = 0; /* To avoid compiler warning... */
813: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
814: value = SSHCTL_MASTER_YES;
815: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
816: value = SSHCTL_MASTER_NO;
817: else if (strcmp(arg, "auto") == 0)
818: value = SSHCTL_MASTER_AUTO;
819: else if (strcmp(arg, "ask") == 0)
820: value = SSHCTL_MASTER_ASK;
821: else if (strcmp(arg, "autoask") == 0)
822: value = SSHCTL_MASTER_AUTO_ASK;
823: else
824: fatal("%.200s line %d: Bad ControlMaster argument.",
825: filename, linenum);
826: if (*activep && *intptr == -1)
827: *intptr = value;
828: break;
1.132 djm 829:
1.136 djm 830: case oHashKnownHosts:
831: intptr = &options->hash_known_hosts;
832: goto parse_flag;
833:
1.143.2.1! brad 834: case oTunnel:
! 835: intptr = &options->tun_open;
! 836: arg = strdelim(&s);
! 837: if (!arg || *arg == '\0')
! 838: fatal("%s line %d: Missing yes/point-to-point/"
! 839: "ethernet/no argument.", filename, linenum);
! 840: value = 0; /* silence compiler */
! 841: if (strcasecmp(arg, "ethernet") == 0)
! 842: value = SSH_TUNMODE_ETHERNET;
! 843: else if (strcasecmp(arg, "point-to-point") == 0)
! 844: value = SSH_TUNMODE_POINTOPOINT;
! 845: else if (strcasecmp(arg, "yes") == 0)
! 846: value = SSH_TUNMODE_DEFAULT;
! 847: else if (strcasecmp(arg, "no") == 0)
! 848: value = SSH_TUNMODE_NO;
! 849: else
! 850: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
! 851: "no argument: %s", filename, linenum, arg);
! 852: if (*activep)
! 853: *intptr = value;
! 854: break;
! 855:
! 856: case oTunnelDevice:
! 857: arg = strdelim(&s);
! 858: if (!arg || *arg == '\0')
! 859: fatal("%.200s line %d: Missing argument.", filename, linenum);
! 860: value = a2tun(arg, &value2);
! 861: if (value == SSH_TUNID_ERR)
! 862: fatal("%.200s line %d: Bad tun device.", filename, linenum);
! 863: if (*activep) {
! 864: options->tun_local = value;
! 865: options->tun_remote = value2;
! 866: }
! 867: break;
! 868:
! 869: case oLocalCommand:
! 870: charptr = &options->local_command;
! 871: goto parse_command;
! 872:
! 873: case oPermitLocalCommand:
! 874: intptr = &options->permit_local_command;
! 875: goto parse_flag;
! 876:
1.96 markus 877: case oDeprecated:
1.98 markus 878: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 879: filename, linenum, keyword);
1.98 markus 880: return 0;
1.96 markus 881:
1.110 jakob 882: case oUnsupported:
883: error("%s line %d: Unsupported option \"%s\"",
884: filename, linenum, keyword);
885: return 0;
886:
1.17 markus 887: default:
888: fatal("process_config_line: Unimplemented opcode %d", opcode);
889: }
890:
891: /* Check that there is no garbage at end of line. */
1.57 djm 892: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 893: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 894: filename, linenum, arg);
1.39 ho 895: }
1.17 markus 896: return 0;
1.1 deraadt 897: }
898:
899:
1.19 markus 900: /*
901: * Reads the config file and modifies the options accordingly. Options
902: * should already be initialized before this call. This never returns if
1.89 stevesk 903: * there is an error. If the file does not exist, this returns 0.
1.19 markus 904: */
1.1 deraadt 905:
1.89 stevesk 906: int
1.134 deraadt 907: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 908: int checkperm)
1.1 deraadt 909: {
1.17 markus 910: FILE *f;
911: char line[1024];
912: int active, linenum;
913: int bad_options = 0;
914:
915: /* Open the file. */
1.129 djm 916: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 917: return 0;
1.129 djm 918:
919: if (checkperm) {
920: struct stat sb;
1.134 deraadt 921:
1.131 dtucker 922: if (fstat(fileno(f), &sb) == -1)
1.129 djm 923: fatal("fstat %s: %s", filename, strerror(errno));
924: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 925: (sb.st_mode & 022) != 0))
1.129 djm 926: fatal("Bad owner or permissions on %s", filename);
927: }
1.17 markus 928:
929: debug("Reading configuration data %.200s", filename);
930:
1.19 markus 931: /*
932: * Mark that we are now processing the options. This flag is turned
933: * on/off by Host specifications.
934: */
1.17 markus 935: active = 1;
936: linenum = 0;
937: while (fgets(line, sizeof(line), f)) {
938: /* Update line number counter. */
939: linenum++;
940: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
941: bad_options++;
942: }
943: fclose(f);
944: if (bad_options > 0)
1.64 millert 945: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 946: filename, bad_options);
1.89 stevesk 947: return 1;
1.1 deraadt 948: }
949:
1.19 markus 950: /*
951: * Initializes options to special values that indicate that they have not yet
952: * been set. Read_config_file will only set options with this value. Options
953: * are processed in the following order: command line, user config file,
954: * system config file. Last, fill_default_options is called.
955: */
1.1 deraadt 956:
1.26 markus 957: void
1.17 markus 958: initialize_options(Options * options)
1.1 deraadt 959: {
1.17 markus 960: memset(options, 'X', sizeof(*options));
961: options->forward_agent = -1;
962: options->forward_x11 = -1;
1.123 markus 963: options->forward_x11_trusted = -1;
1.34 markus 964: options->xauth_location = NULL;
1.17 markus 965: options->gateway_ports = -1;
966: options->use_privileged_port = -1;
967: options->rsa_authentication = -1;
1.50 markus 968: options->pubkey_authentication = -1;
1.78 markus 969: options->challenge_response_authentication = -1;
1.118 markus 970: options->gss_authentication = -1;
971: options->gss_deleg_creds = -1;
1.17 markus 972: options->password_authentication = -1;
1.48 markus 973: options->kbd_interactive_authentication = -1;
974: options->kbd_interactive_devices = NULL;
1.17 markus 975: options->rhosts_rsa_authentication = -1;
1.72 markus 976: options->hostbased_authentication = -1;
1.17 markus 977: options->batch_mode = -1;
978: options->check_host_ip = -1;
979: options->strict_host_key_checking = -1;
980: options->compression = -1;
1.126 markus 981: options->tcp_keep_alive = -1;
1.17 markus 982: options->compression_level = -1;
983: options->port = -1;
1.114 djm 984: options->address_family = -1;
1.17 markus 985: options->connection_attempts = -1;
1.111 djm 986: options->connection_timeout = -1;
1.17 markus 987: options->number_of_password_prompts = -1;
988: options->cipher = -1;
1.25 markus 989: options->ciphers = NULL;
1.62 markus 990: options->macs = NULL;
1.76 markus 991: options->hostkeyalgorithms = NULL;
1.25 markus 992: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 993: options->num_identity_files = 0;
994: options->hostname = NULL;
1.52 markus 995: options->host_key_alias = NULL;
1.17 markus 996: options->proxy_command = NULL;
997: options->user = NULL;
998: options->escape_char = -1;
999: options->system_hostfile = NULL;
1000: options->user_hostfile = NULL;
1.27 markus 1001: options->system_hostfile2 = NULL;
1002: options->user_hostfile2 = NULL;
1.17 markus 1003: options->num_local_forwards = 0;
1004: options->num_remote_forwards = 0;
1.90 stevesk 1005: options->clear_forwardings = -1;
1.95 markus 1006: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1007: options->preferred_authentications = NULL;
1.77 markus 1008: options->bind_address = NULL;
1.86 markus 1009: options->smartcard_device = NULL;
1.101 markus 1010: options->enable_ssh_keysign = - 1;
1.91 markus 1011: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1012: options->identities_only = - 1;
1.105 markus 1013: options->rekey_limit = - 1;
1.107 jakob 1014: options->verify_host_key_dns = -1;
1.127 markus 1015: options->server_alive_interval = -1;
1016: options->server_alive_count_max = -1;
1.130 djm 1017: options->num_send_env = 0;
1.132 djm 1018: options->control_path = NULL;
1019: options->control_master = -1;
1.136 djm 1020: options->hash_known_hosts = -1;
1.143.2.1! brad 1021: options->tun_open = -1;
! 1022: options->tun_local = -1;
! 1023: options->tun_remote = -1;
! 1024: options->local_command = NULL;
! 1025: options->permit_local_command = -1;
1.1 deraadt 1026: }
1027:
1.19 markus 1028: /*
1029: * Called after processing other sources of option data, this fills those
1030: * options for which no value has been specified with their default values.
1031: */
1.1 deraadt 1032:
1.26 markus 1033: void
1.17 markus 1034: fill_default_options(Options * options)
1.1 deraadt 1035: {
1.61 deraadt 1036: int len;
1037:
1.17 markus 1038: if (options->forward_agent == -1)
1.33 markus 1039: options->forward_agent = 0;
1.17 markus 1040: if (options->forward_x11 == -1)
1.23 markus 1041: options->forward_x11 = 0;
1.123 markus 1042: if (options->forward_x11_trusted == -1)
1043: options->forward_x11_trusted = 0;
1.34 markus 1044: if (options->xauth_location == NULL)
1.80 markus 1045: options->xauth_location = _PATH_XAUTH;
1.17 markus 1046: if (options->gateway_ports == -1)
1047: options->gateway_ports = 0;
1048: if (options->use_privileged_port == -1)
1.65 markus 1049: options->use_privileged_port = 0;
1.17 markus 1050: if (options->rsa_authentication == -1)
1051: options->rsa_authentication = 1;
1.50 markus 1052: if (options->pubkey_authentication == -1)
1053: options->pubkey_authentication = 1;
1.78 markus 1054: if (options->challenge_response_authentication == -1)
1.83 markus 1055: options->challenge_response_authentication = 1;
1.118 markus 1056: if (options->gss_authentication == -1)
1.122 markus 1057: options->gss_authentication = 0;
1.118 markus 1058: if (options->gss_deleg_creds == -1)
1059: options->gss_deleg_creds = 0;
1.17 markus 1060: if (options->password_authentication == -1)
1061: options->password_authentication = 1;
1.48 markus 1062: if (options->kbd_interactive_authentication == -1)
1.59 markus 1063: options->kbd_interactive_authentication = 1;
1.17 markus 1064: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1065: options->rhosts_rsa_authentication = 0;
1.72 markus 1066: if (options->hostbased_authentication == -1)
1067: options->hostbased_authentication = 0;
1.17 markus 1068: if (options->batch_mode == -1)
1069: options->batch_mode = 0;
1070: if (options->check_host_ip == -1)
1071: options->check_host_ip = 1;
1072: if (options->strict_host_key_checking == -1)
1073: options->strict_host_key_checking = 2; /* 2 is default */
1074: if (options->compression == -1)
1075: options->compression = 0;
1.126 markus 1076: if (options->tcp_keep_alive == -1)
1077: options->tcp_keep_alive = 1;
1.17 markus 1078: if (options->compression_level == -1)
1079: options->compression_level = 6;
1080: if (options->port == -1)
1081: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1082: if (options->address_family == -1)
1083: options->address_family = AF_UNSPEC;
1.17 markus 1084: if (options->connection_attempts == -1)
1.84 markus 1085: options->connection_attempts = 1;
1.17 markus 1086: if (options->number_of_password_prompts == -1)
1087: options->number_of_password_prompts = 3;
1088: /* Selected in ssh_login(). */
1089: if (options->cipher == -1)
1090: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1091: /* options->ciphers, default set in myproposals.h */
1.62 markus 1092: /* options->macs, default set in myproposals.h */
1.76 markus 1093: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1094: if (options->protocol == SSH_PROTO_UNKNOWN)
1.69 markus 1095: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
1.17 markus 1096: if (options->num_identity_files == 0) {
1.50 markus 1097: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1098: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1099: options->identity_files[options->num_identity_files] =
1.61 deraadt 1100: xmalloc(len);
1101: snprintf(options->identity_files[options->num_identity_files++],
1102: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1103: }
1104: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1105: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1106: options->identity_files[options->num_identity_files] =
1107: xmalloc(len);
1108: snprintf(options->identity_files[options->num_identity_files++],
1109: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1110:
1.61 deraadt 1111: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1112: options->identity_files[options->num_identity_files] =
1.61 deraadt 1113: xmalloc(len);
1114: snprintf(options->identity_files[options->num_identity_files++],
1115: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.50 markus 1116: }
1.27 markus 1117: }
1.17 markus 1118: if (options->escape_char == -1)
1119: options->escape_char = '~';
1120: if (options->system_hostfile == NULL)
1.55 markus 1121: options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
1.17 markus 1122: if (options->user_hostfile == NULL)
1.55 markus 1123: options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
1.27 markus 1124: if (options->system_hostfile2 == NULL)
1.55 markus 1125: options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
1.27 markus 1126: if (options->user_hostfile2 == NULL)
1.55 markus 1127: options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
1.95 markus 1128: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1129: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1130: if (options->clear_forwardings == 1)
1131: clear_forwardings(options);
1.91 markus 1132: if (options->no_host_authentication_for_localhost == - 1)
1133: options->no_host_authentication_for_localhost = 0;
1.128 markus 1134: if (options->identities_only == -1)
1135: options->identities_only = 0;
1.101 markus 1136: if (options->enable_ssh_keysign == -1)
1137: options->enable_ssh_keysign = 0;
1.105 markus 1138: if (options->rekey_limit == -1)
1139: options->rekey_limit = 0;
1.107 jakob 1140: if (options->verify_host_key_dns == -1)
1141: options->verify_host_key_dns = 0;
1.127 markus 1142: if (options->server_alive_interval == -1)
1143: options->server_alive_interval = 0;
1144: if (options->server_alive_count_max == -1)
1145: options->server_alive_count_max = 3;
1.132 djm 1146: if (options->control_master == -1)
1147: options->control_master = 0;
1.136 djm 1148: if (options->hash_known_hosts == -1)
1149: options->hash_known_hosts = 0;
1.143.2.1! brad 1150: if (options->tun_open == -1)
! 1151: options->tun_open = SSH_TUNMODE_NO;
! 1152: if (options->tun_local == -1)
! 1153: options->tun_local = SSH_TUNID_ANY;
! 1154: if (options->tun_remote == -1)
! 1155: options->tun_remote = SSH_TUNID_ANY;
! 1156: if (options->permit_local_command == -1)
! 1157: options->permit_local_command = 0;
! 1158: /* options->local_command should not be set by default */
1.17 markus 1159: /* options->proxy_command should not be set by default */
1160: /* options->user will be set in the main program if appropriate */
1161: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1162: /* options->host_key_alias should not be set by default */
1.67 markus 1163: /* options->preferred_authentications will be set in ssh */
1.135 djm 1164: }
1165:
1166: /*
1167: * parse_forward
1168: * parses a string containing a port forwarding specification of the form:
1169: * [listenhost:]listenport:connecthost:connectport
1170: * returns number of arguments parsed or zero on error
1171: */
1172: int
1173: parse_forward(Forward *fwd, const char *fwdspec)
1174: {
1175: int i;
1176: char *p, *cp, *fwdarg[4];
1177:
1178: memset(fwd, '\0', sizeof(*fwd));
1179:
1180: cp = p = xstrdup(fwdspec);
1181:
1182: /* skip leading spaces */
1183: while (*cp && isspace(*cp))
1184: cp++;
1185:
1186: for (i = 0; i < 4; ++i)
1187: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1188: break;
1189:
1190: /* Check for trailing garbage in 4-arg case*/
1191: if (cp != NULL)
1192: i = 0; /* failure */
1193:
1194: switch (i) {
1195: case 3:
1196: fwd->listen_host = NULL;
1197: fwd->listen_port = a2port(fwdarg[0]);
1198: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1199: fwd->connect_port = a2port(fwdarg[2]);
1200: break;
1201:
1202: case 4:
1203: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1204: fwd->listen_port = a2port(fwdarg[1]);
1205: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1206: fwd->connect_port = a2port(fwdarg[3]);
1207: break;
1208: default:
1209: i = 0; /* failure */
1210: }
1211:
1212: xfree(p);
1213:
1214: if (fwd->listen_port == 0 && fwd->connect_port == 0)
1215: goto fail_free;
1216:
1217: if (fwd->connect_host != NULL &&
1218: strlen(fwd->connect_host) >= NI_MAXHOST)
1219: goto fail_free;
1220:
1221: return (i);
1222:
1223: fail_free:
1224: if (fwd->connect_host != NULL)
1225: xfree(fwd->connect_host);
1226: if (fwd->listen_host != NULL)
1227: xfree(fwd->listen_host);
1228: return (0);
1.1 deraadt 1229: }
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