Annotation of src/usr.bin/ssh/readconf.c, Revision 1.155
1.155 ! stevesk 1: /* $OpenBSD: readconf.c,v 1.154 2006/07/11 20:07:25 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>
1.1 deraadt 26:
27: #include "ssh.h"
28: #include "xmalloc.h"
1.25 markus 29: #include "compat.h"
1.58 markus 30: #include "cipher.h"
1.55 markus 31: #include "pathnames.h"
1.58 markus 32: #include "log.h"
33: #include "readconf.h"
34: #include "match.h"
35: #include "misc.h"
1.62 markus 36: #include "kex.h"
37: #include "mac.h"
1.1 deraadt 38:
39: /* Format of the configuration file:
40:
41: # Configuration data is parsed as follows:
42: # 1. command line options
43: # 2. user-specific file
44: # 3. system-wide file
45: # Any configuration value is only changed the first time it is set.
46: # Thus, host-specific definitions should be at the beginning of the
47: # configuration file, and defaults at the end.
48:
49: # Host-specific declarations. These may override anything above. A single
50: # host may match multiple declarations; these are processed in the order
51: # that they are given in.
52:
53: Host *.ngs.fi ngs.fi
1.96 markus 54: User foo
1.1 deraadt 55:
56: Host fake.com
57: HostName another.host.name.real.org
58: User blaah
59: Port 34289
60: ForwardX11 no
61: ForwardAgent no
62:
63: Host books.com
64: RemoteForward 9999 shadows.cs.hut.fi:9999
65: Cipher 3des
66:
67: Host fascist.blob.com
68: Port 23123
69: User tylonen
70: PasswordAuthentication no
71:
72: Host puukko.hut.fi
73: User t35124p
74: ProxyCommand ssh-proxy %h %p
75:
76: Host *.fr
1.96 markus 77: PublicKeyAuthentication no
1.1 deraadt 78:
79: Host *.su
80: Cipher none
81: PasswordAuthentication no
82:
1.144 reyk 83: Host vpn.fake.com
84: Tunnel yes
85: TunnelDevice 3
86:
1.1 deraadt 87: # Defaults for various options
88: Host *
89: ForwardAgent no
1.50 markus 90: ForwardX11 no
1.1 deraadt 91: PasswordAuthentication yes
92: RSAAuthentication yes
93: RhostsRSAAuthentication yes
94: StrictHostKeyChecking yes
1.126 markus 95: TcpKeepAlive no
1.1 deraadt 96: IdentityFile ~/.ssh/identity
97: Port 22
98: EscapeChar ~
99:
100: */
101:
102: /* Keyword tokens. */
103:
1.17 markus 104: typedef enum {
105: oBadOption,
1.123 markus 106: oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts,
1.153 markus 107: oExitOnForwardFailure,
1.100 deraadt 108: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 109: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 110: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
111: oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
112: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
113: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 114: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 115: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 116: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 117: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 118: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.90 stevesk 119: oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
1.96 markus 120: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 121: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 122: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 123: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.136 djm 124: oSendEnv, oControlPath, oControlMaster, oHashKnownHosts,
1.144 reyk 125: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.110 jakob 126: oDeprecated, oUnsupported
1.1 deraadt 127: } OpCodes;
128:
129: /* Textual representations of the tokens. */
130:
1.17 markus 131: static struct {
132: const char *name;
133: OpCodes opcode;
134: } keywords[] = {
135: { "forwardagent", oForwardAgent },
136: { "forwardx11", oForwardX11 },
1.123 markus 137: { "forwardx11trusted", oForwardX11Trusted },
1.153 markus 138: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 139: { "xauthlocation", oXAuthLocation },
1.17 markus 140: { "gatewayports", oGatewayPorts },
141: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 142: { "rhostsauthentication", oDeprecated },
1.17 markus 143: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 144: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
145: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 146: { "rsaauthentication", oRSAAuthentication },
1.50 markus 147: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 148: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 149: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 150: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 151: { "challengeresponseauthentication", oChallengeResponseAuthentication },
152: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
153: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 154: { "kerberosauthentication", oUnsupported },
155: { "kerberostgtpassing", oUnsupported },
156: { "afstokenpassing", oUnsupported },
1.118 markus 157: #if defined(GSSAPI)
158: { "gssapiauthentication", oGssAuthentication },
159: { "gssapidelegatecredentials", oGssDelegateCreds },
160: #else
161: { "gssapiauthentication", oUnsupported },
162: { "gssapidelegatecredentials", oUnsupported },
163: #endif
1.96 markus 164: { "fallbacktorsh", oDeprecated },
165: { "usersh", oDeprecated },
1.17 markus 166: { "identityfile", oIdentityFile },
1.50 markus 167: { "identityfile2", oIdentityFile }, /* alias */
1.128 markus 168: { "identitiesonly", oIdentitiesOnly },
1.17 markus 169: { "hostname", oHostName },
1.52 markus 170: { "hostkeyalias", oHostKeyAlias },
1.17 markus 171: { "proxycommand", oProxyCommand },
172: { "port", oPort },
173: { "cipher", oCipher },
1.25 markus 174: { "ciphers", oCiphers },
1.62 markus 175: { "macs", oMacs },
1.25 markus 176: { "protocol", oProtocol },
1.17 markus 177: { "remoteforward", oRemoteForward },
178: { "localforward", oLocalForward },
179: { "user", oUser },
180: { "host", oHost },
181: { "escapechar", oEscapeChar },
182: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.81 markus 183: { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */
1.27 markus 184: { "globalknownhostsfile2", oGlobalKnownHostsFile2 },
1.81 markus 185: { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
1.17 markus 186: { "connectionattempts", oConnectionAttempts },
187: { "batchmode", oBatchMode },
188: { "checkhostip", oCheckHostIP },
189: { "stricthostkeychecking", oStrictHostKeyChecking },
190: { "compression", oCompression },
191: { "compressionlevel", oCompressionLevel },
1.126 markus 192: { "tcpkeepalive", oTCPKeepAlive },
193: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 194: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
195: { "loglevel", oLogLevel },
1.71 markus 196: { "dynamicforward", oDynamicForward },
1.67 markus 197: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 198: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 199: { "bindaddress", oBindAddress },
1.110 jakob 200: #ifdef SMARTCARD
1.85 jakob 201: { "smartcarddevice", oSmartcardDevice },
1.110 jakob 202: #else
203: { "smartcarddevice", oUnsupported },
204: #endif
1.93 deraadt 205: { "clearallforwardings", oClearAllForwardings },
1.101 markus 206: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 207: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 208: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 209: { "rekeylimit", oRekeyLimit },
1.111 djm 210: { "connecttimeout", oConnectTimeout },
1.112 djm 211: { "addressfamily", oAddressFamily },
1.127 markus 212: { "serveraliveinterval", oServerAliveInterval },
213: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 214: { "sendenv", oSendEnv },
1.132 djm 215: { "controlpath", oControlPath },
216: { "controlmaster", oControlMaster },
1.136 djm 217: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 218: { "tunnel", oTunnel },
219: { "tunneldevice", oTunnelDevice },
220: { "localcommand", oLocalCommand },
221: { "permitlocalcommand", oPermitLocalCommand },
1.92 stevesk 222: { NULL, oBadOption }
1.13 markus 223: };
224:
1.19 markus 225: /*
226: * Adds a local TCP/IP port forward to options. Never returns if there is an
227: * error.
228: */
1.1 deraadt 229:
1.26 markus 230: void
1.135 djm 231: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 232: {
1.17 markus 233: Forward *fwd;
234: extern uid_t original_real_uid;
1.135 djm 235: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 236: fatal("Privileged ports can only be forwarded by root.");
1.17 markus 237: if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
238: fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
239: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 240:
241: fwd->listen_host = (newfwd->listen_host == NULL) ?
242: NULL : xstrdup(newfwd->listen_host);
243: fwd->listen_port = newfwd->listen_port;
244: fwd->connect_host = xstrdup(newfwd->connect_host);
245: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 246: }
247:
1.19 markus 248: /*
249: * Adds a remote TCP/IP port forward to options. Never returns if there is
250: * an error.
251: */
1.1 deraadt 252:
1.26 markus 253: void
1.135 djm 254: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 255: {
1.17 markus 256: Forward *fwd;
257: if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
258: fatal("Too many remote forwards (max %d).",
1.93 deraadt 259: SSH_MAX_FORWARDS_PER_DIRECTION);
1.17 markus 260: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 261:
262: fwd->listen_host = (newfwd->listen_host == NULL) ?
263: NULL : xstrdup(newfwd->listen_host);
264: fwd->listen_port = newfwd->listen_port;
265: fwd->connect_host = xstrdup(newfwd->connect_host);
266: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 267: }
268:
1.90 stevesk 269: static void
270: clear_forwardings(Options *options)
271: {
272: int i;
273:
1.135 djm 274: for (i = 0; i < options->num_local_forwards; i++) {
1.138 dtucker 275: if (options->local_forwards[i].listen_host != NULL)
276: xfree(options->local_forwards[i].listen_host);
1.135 djm 277: xfree(options->local_forwards[i].connect_host);
278: }
1.90 stevesk 279: options->num_local_forwards = 0;
1.135 djm 280: for (i = 0; i < options->num_remote_forwards; i++) {
1.138 dtucker 281: if (options->remote_forwards[i].listen_host != NULL)
282: xfree(options->remote_forwards[i].listen_host);
1.135 djm 283: xfree(options->remote_forwards[i].connect_host);
284: }
1.90 stevesk 285: options->num_remote_forwards = 0;
1.145 reyk 286: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 287: }
288:
1.19 markus 289: /*
1.70 stevesk 290: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 291: */
1.1 deraadt 292:
1.26 markus 293: static OpCodes
1.17 markus 294: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 295: {
1.51 markus 296: u_int i;
1.1 deraadt 297:
1.17 markus 298: for (i = 0; keywords[i].name; i++)
1.20 markus 299: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 300: return keywords[i].opcode;
301:
1.75 stevesk 302: error("%s: line %d: Bad configuration option: %s",
303: filename, linenum, cp);
1.17 markus 304: return oBadOption;
1.1 deraadt 305: }
306:
1.19 markus 307: /*
308: * Processes a single option line as used in the configuration files. This
309: * only sets those values that have not already been set.
310: */
1.102 markus 311: #define WHITESPACE " \t\r\n"
1.1 deraadt 312:
1.14 markus 313: int
314: process_config_line(Options *options, const char *host,
1.17 markus 315: char *line, const char *filename, int linenum,
316: int *activep)
1.1 deraadt 317: {
1.135 djm 318: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
1.146 djm 319: int opcode, *intptr, value, value2, scale;
320: long long orig, val64;
1.102 markus 321: size_t len;
1.135 djm 322: Forward fwd;
1.106 djm 323:
324: /* Strip trailing whitespace */
1.139 deraadt 325: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 326: if (strchr(WHITESPACE, line[len]) == NULL)
327: break;
328: line[len] = '\0';
329: }
1.1 deraadt 330:
1.42 provos 331: s = line;
332: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 333: if ((keyword = strdelim(&s)) == NULL)
334: return 0;
1.42 provos 335: /* Ignore leading whitespace. */
336: if (*keyword == '\0')
1.43 markus 337: keyword = strdelim(&s);
1.56 deraadt 338: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 339: return 0;
340:
1.38 provos 341: opcode = parse_token(keyword, filename, linenum);
1.17 markus 342:
343: switch (opcode) {
344: case oBadOption:
1.19 markus 345: /* don't panic, but count bad options */
346: return -1;
1.17 markus 347: /* NOTREACHED */
1.111 djm 348: case oConnectTimeout:
349: intptr = &options->connection_timeout;
1.127 markus 350: parse_time:
1.111 djm 351: arg = strdelim(&s);
352: if (!arg || *arg == '\0')
353: fatal("%s line %d: missing time value.",
354: filename, linenum);
355: if ((value = convtime(arg)) == -1)
356: fatal("%s line %d: invalid time value.",
357: filename, linenum);
358: if (*intptr == -1)
359: *intptr = value;
360: break;
361:
1.17 markus 362: case oForwardAgent:
363: intptr = &options->forward_agent;
364: parse_flag:
1.42 provos 365: arg = strdelim(&s);
1.40 ho 366: if (!arg || *arg == '\0')
1.17 markus 367: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
368: value = 0; /* To avoid compiler warning... */
1.38 provos 369: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 370: value = 1;
1.38 provos 371: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 372: value = 0;
373: else
374: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
375: if (*activep && *intptr == -1)
376: *intptr = value;
377: break;
378:
379: case oForwardX11:
380: intptr = &options->forward_x11;
381: goto parse_flag;
382:
1.123 markus 383: case oForwardX11Trusted:
384: intptr = &options->forward_x11_trusted;
385: goto parse_flag;
386:
1.17 markus 387: case oGatewayPorts:
388: intptr = &options->gateway_ports;
389: goto parse_flag;
390:
1.153 markus 391: case oExitOnForwardFailure:
392: intptr = &options->exit_on_forward_failure;
393: goto parse_flag;
394:
1.17 markus 395: case oUsePrivilegedPort:
396: intptr = &options->use_privileged_port;
397: goto parse_flag;
398:
399: case oPasswordAuthentication:
400: intptr = &options->password_authentication;
401: goto parse_flag;
402:
1.48 markus 403: case oKbdInteractiveAuthentication:
404: intptr = &options->kbd_interactive_authentication;
405: goto parse_flag;
406:
407: case oKbdInteractiveDevices:
408: charptr = &options->kbd_interactive_devices;
409: goto parse_string;
410:
1.50 markus 411: case oPubkeyAuthentication:
412: intptr = &options->pubkey_authentication;
1.30 markus 413: goto parse_flag;
414:
1.17 markus 415: case oRSAAuthentication:
416: intptr = &options->rsa_authentication;
417: goto parse_flag;
418:
419: case oRhostsRSAAuthentication:
420: intptr = &options->rhosts_rsa_authentication;
421: goto parse_flag;
422:
1.72 markus 423: case oHostbasedAuthentication:
424: intptr = &options->hostbased_authentication;
425: goto parse_flag;
426:
1.59 markus 427: case oChallengeResponseAuthentication:
1.78 markus 428: intptr = &options->challenge_response_authentication;
1.17 markus 429: goto parse_flag;
1.108 jakob 430:
1.118 markus 431: case oGssAuthentication:
432: intptr = &options->gss_authentication;
433: goto parse_flag;
434:
435: case oGssDelegateCreds:
436: intptr = &options->gss_deleg_creds;
437: goto parse_flag;
438:
1.17 markus 439: case oBatchMode:
440: intptr = &options->batch_mode;
441: goto parse_flag;
442:
443: case oCheckHostIP:
444: intptr = &options->check_host_ip;
445: goto parse_flag;
446:
1.107 jakob 447: case oVerifyHostKeyDNS:
448: intptr = &options->verify_host_key_dns;
1.125 jakob 449: goto parse_yesnoask;
1.107 jakob 450:
1.17 markus 451: case oStrictHostKeyChecking:
452: intptr = &options->strict_host_key_checking;
1.125 jakob 453: parse_yesnoask:
1.42 provos 454: arg = strdelim(&s);
1.40 ho 455: if (!arg || *arg == '\0')
1.60 stevesk 456: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 457: filename, linenum);
1.17 markus 458: value = 0; /* To avoid compiler warning... */
1.38 provos 459: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 460: value = 1;
1.38 provos 461: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 462: value = 0;
1.38 provos 463: else if (strcmp(arg, "ask") == 0)
1.17 markus 464: value = 2;
465: else
466: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
467: if (*activep && *intptr == -1)
468: *intptr = value;
469: break;
470:
471: case oCompression:
472: intptr = &options->compression;
473: goto parse_flag;
474:
1.126 markus 475: case oTCPKeepAlive:
476: intptr = &options->tcp_keep_alive;
1.17 markus 477: goto parse_flag;
478:
1.91 markus 479: case oNoHostAuthenticationForLocalhost:
480: intptr = &options->no_host_authentication_for_localhost;
481: goto parse_flag;
482:
1.17 markus 483: case oNumberOfPasswordPrompts:
484: intptr = &options->number_of_password_prompts;
485: goto parse_int;
486:
487: case oCompressionLevel:
488: intptr = &options->compression_level;
489: goto parse_int;
490:
1.105 markus 491: case oRekeyLimit:
492: intptr = &options->rekey_limit;
493: arg = strdelim(&s);
494: if (!arg || *arg == '\0')
495: fatal("%.200s line %d: Missing argument.", filename, linenum);
496: if (arg[0] < '0' || arg[0] > '9')
497: fatal("%.200s line %d: Bad number.", filename, linenum);
1.146 djm 498: orig = val64 = strtoll(arg, &endofnumber, 10);
1.105 markus 499: if (arg == endofnumber)
500: fatal("%.200s line %d: Bad number.", filename, linenum);
501: switch (toupper(*endofnumber)) {
1.146 djm 502: case '\0':
503: scale = 1;
504: break;
1.105 markus 505: case 'K':
1.146 djm 506: scale = 1<<10;
1.105 markus 507: break;
508: case 'M':
1.146 djm 509: scale = 1<<20;
1.105 markus 510: break;
511: case 'G':
1.146 djm 512: scale = 1<<30;
1.105 markus 513: break;
1.146 djm 514: default:
515: fatal("%.200s line %d: Invalid RekeyLimit suffix",
516: filename, linenum);
1.105 markus 517: }
1.146 djm 518: val64 *= scale;
519: /* detect integer wrap and too-large limits */
520: if ((val64 / scale) != orig || val64 > INT_MAX)
521: fatal("%.200s line %d: RekeyLimit too large",
522: filename, linenum);
523: if (val64 < 16)
524: fatal("%.200s line %d: RekeyLimit too small",
525: filename, linenum);
1.105 markus 526: if (*activep && *intptr == -1)
1.146 djm 527: *intptr = (int)val64;
1.105 markus 528: break;
529:
1.17 markus 530: case oIdentityFile:
1.42 provos 531: arg = strdelim(&s);
1.40 ho 532: if (!arg || *arg == '\0')
1.17 markus 533: fatal("%.200s line %d: Missing argument.", filename, linenum);
534: if (*activep) {
1.50 markus 535: intptr = &options->num_identity_files;
1.27 markus 536: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 537: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 538: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.50 markus 539: charptr = &options->identity_files[*intptr];
1.38 provos 540: *charptr = xstrdup(arg);
1.27 markus 541: *intptr = *intptr + 1;
1.17 markus 542: }
543: break;
544:
1.34 markus 545: case oXAuthLocation:
546: charptr=&options->xauth_location;
547: goto parse_string;
548:
1.17 markus 549: case oUser:
550: charptr = &options->user;
551: parse_string:
1.42 provos 552: arg = strdelim(&s);
1.40 ho 553: if (!arg || *arg == '\0')
1.17 markus 554: fatal("%.200s line %d: Missing argument.", filename, linenum);
555: if (*activep && *charptr == NULL)
1.38 provos 556: *charptr = xstrdup(arg);
1.17 markus 557: break;
558:
559: case oGlobalKnownHostsFile:
560: charptr = &options->system_hostfile;
561: goto parse_string;
562:
563: case oUserKnownHostsFile:
564: charptr = &options->user_hostfile;
565: goto parse_string;
566:
1.27 markus 567: case oGlobalKnownHostsFile2:
568: charptr = &options->system_hostfile2;
569: goto parse_string;
570:
571: case oUserKnownHostsFile2:
572: charptr = &options->user_hostfile2;
573: goto parse_string;
574:
1.17 markus 575: case oHostName:
576: charptr = &options->hostname;
577: goto parse_string;
578:
1.52 markus 579: case oHostKeyAlias:
580: charptr = &options->host_key_alias;
581: goto parse_string;
582:
1.67 markus 583: case oPreferredAuthentications:
584: charptr = &options->preferred_authentications;
585: goto parse_string;
586:
1.77 markus 587: case oBindAddress:
588: charptr = &options->bind_address;
589: goto parse_string;
590:
1.85 jakob 591: case oSmartcardDevice:
1.86 markus 592: charptr = &options->smartcard_device;
593: goto parse_string;
1.85 jakob 594:
1.17 markus 595: case oProxyCommand:
1.144 reyk 596: charptr = &options->proxy_command;
597: parse_command:
1.113 markus 598: if (s == NULL)
599: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 600: len = strspn(s, WHITESPACE "=");
1.17 markus 601: if (*activep && *charptr == NULL)
1.102 markus 602: *charptr = xstrdup(s + len);
1.17 markus 603: return 0;
604:
605: case oPort:
606: intptr = &options->port;
607: parse_int:
1.42 provos 608: arg = strdelim(&s);
1.40 ho 609: if (!arg || *arg == '\0')
1.17 markus 610: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 611: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 612: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 613:
614: /* Octal, decimal, or hex format? */
1.38 provos 615: value = strtol(arg, &endofnumber, 0);
616: if (arg == endofnumber)
1.21 markus 617: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 618: if (*activep && *intptr == -1)
619: *intptr = value;
620: break;
621:
622: case oConnectionAttempts:
623: intptr = &options->connection_attempts;
624: goto parse_int;
625:
626: case oCipher:
627: intptr = &options->cipher;
1.42 provos 628: arg = strdelim(&s);
1.40 ho 629: if (!arg || *arg == '\0')
1.32 markus 630: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 631: value = cipher_number(arg);
1.17 markus 632: if (value == -1)
633: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 634: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 635: if (*activep && *intptr == -1)
636: *intptr = value;
637: break;
638:
1.25 markus 639: case oCiphers:
1.42 provos 640: arg = strdelim(&s);
1.40 ho 641: if (!arg || *arg == '\0')
1.32 markus 642: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 643: if (!ciphers_valid(arg))
1.31 markus 644: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 645: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 646: if (*activep && options->ciphers == NULL)
1.38 provos 647: options->ciphers = xstrdup(arg);
1.25 markus 648: break;
649:
1.62 markus 650: case oMacs:
651: arg = strdelim(&s);
652: if (!arg || *arg == '\0')
653: fatal("%.200s line %d: Missing argument.", filename, linenum);
654: if (!mac_valid(arg))
655: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 656: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 657: if (*activep && options->macs == NULL)
658: options->macs = xstrdup(arg);
659: break;
660:
1.76 markus 661: case oHostKeyAlgorithms:
662: arg = strdelim(&s);
663: if (!arg || *arg == '\0')
664: fatal("%.200s line %d: Missing argument.", filename, linenum);
665: if (!key_names_valid2(arg))
666: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 667: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 668: if (*activep && options->hostkeyalgorithms == NULL)
669: options->hostkeyalgorithms = xstrdup(arg);
670: break;
671:
1.25 markus 672: case oProtocol:
673: intptr = &options->protocol;
1.42 provos 674: arg = strdelim(&s);
1.40 ho 675: if (!arg || *arg == '\0')
1.32 markus 676: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 677: value = proto_spec(arg);
1.25 markus 678: if (value == SSH_PROTO_UNKNOWN)
679: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 680: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 681: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
682: *intptr = value;
683: break;
684:
1.17 markus 685: case oLogLevel:
686: intptr = (int *) &options->log_level;
1.42 provos 687: arg = strdelim(&s);
1.38 provos 688: value = log_level_number(arg);
1.95 markus 689: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 690: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 691: filename, linenum, arg ? arg : "<NONE>");
1.95 markus 692: if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET)
1.17 markus 693: *intptr = (LogLevel) value;
694: break;
695:
1.88 stevesk 696: case oLocalForward:
1.17 markus 697: case oRemoteForward:
1.42 provos 698: arg = strdelim(&s);
1.135 djm 699: if (arg == NULL || *arg == '\0')
1.88 stevesk 700: fatal("%.200s line %d: Missing port argument.",
701: filename, linenum);
1.135 djm 702: arg2 = strdelim(&s);
703: if (arg2 == NULL || *arg2 == '\0')
704: fatal("%.200s line %d: Missing target argument.",
1.88 stevesk 705: filename, linenum);
1.135 djm 706:
707: /* construct a string for parse_forward */
708: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
709:
710: if (parse_forward(&fwd, fwdarg) == 0)
1.88 stevesk 711: fatal("%.200s line %d: Bad forwarding specification.",
712: filename, linenum);
1.135 djm 713:
1.88 stevesk 714: if (*activep) {
715: if (opcode == oLocalForward)
1.135 djm 716: add_local_forward(options, &fwd);
1.88 stevesk 717: else if (opcode == oRemoteForward)
1.135 djm 718: add_remote_forward(options, &fwd);
1.88 stevesk 719: }
1.17 markus 720: break;
1.71 markus 721:
722: case oDynamicForward:
723: arg = strdelim(&s);
724: if (!arg || *arg == '\0')
725: fatal("%.200s line %d: Missing port argument.",
726: filename, linenum);
1.135 djm 727: memset(&fwd, '\0', sizeof(fwd));
728: fwd.connect_host = "socks";
729: fwd.listen_host = hpdelim(&arg);
730: if (fwd.listen_host == NULL ||
731: strlen(fwd.listen_host) >= NI_MAXHOST)
732: fatal("%.200s line %d: Bad forwarding specification.",
733: filename, linenum);
734: if (arg) {
735: fwd.listen_port = a2port(arg);
736: fwd.listen_host = cleanhostname(fwd.listen_host);
737: } else {
738: fwd.listen_port = a2port(fwd.listen_host);
1.143 djm 739: fwd.listen_host = NULL;
1.135 djm 740: }
741: if (fwd.listen_port == 0)
1.71 markus 742: fatal("%.200s line %d: Badly formatted port number.",
743: filename, linenum);
1.87 markus 744: if (*activep)
1.135 djm 745: add_local_forward(options, &fwd);
1.72 markus 746: break;
1.17 markus 747:
1.90 stevesk 748: case oClearAllForwardings:
749: intptr = &options->clear_forwardings;
750: goto parse_flag;
751:
1.17 markus 752: case oHost:
753: *activep = 0;
1.42 provos 754: while ((arg = strdelim(&s)) != NULL && *arg != '\0')
1.38 provos 755: if (match_pattern(host, arg)) {
756: debug("Applying options for %.100s", arg);
1.17 markus 757: *activep = 1;
758: break;
759: }
1.42 provos 760: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 761: return 0;
762:
763: case oEscapeChar:
764: intptr = &options->escape_char;
1.42 provos 765: arg = strdelim(&s);
1.40 ho 766: if (!arg || *arg == '\0')
1.17 markus 767: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 768: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 769: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
770: value = (u_char) arg[1] & 31;
1.38 provos 771: else if (strlen(arg) == 1)
1.51 markus 772: value = (u_char) arg[0];
1.38 provos 773: else if (strcmp(arg, "none") == 0)
1.79 stevesk 774: value = SSH_ESCAPECHAR_NONE;
1.17 markus 775: else {
776: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 777: filename, linenum);
1.17 markus 778: /* NOTREACHED */
779: value = 0; /* Avoid compiler warning. */
780: }
781: if (*activep && *intptr == -1)
782: *intptr = value;
1.112 djm 783: break;
784:
785: case oAddressFamily:
786: arg = strdelim(&s);
1.140 markus 787: if (!arg || *arg == '\0')
788: fatal("%s line %d: missing address family.",
789: filename, linenum);
1.114 djm 790: intptr = &options->address_family;
1.112 djm 791: if (strcasecmp(arg, "inet") == 0)
1.114 djm 792: value = AF_INET;
1.112 djm 793: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 794: value = AF_INET6;
1.112 djm 795: else if (strcasecmp(arg, "any") == 0)
1.114 djm 796: value = AF_UNSPEC;
1.112 djm 797: else
798: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 799: if (*activep && *intptr == -1)
800: *intptr = value;
1.17 markus 801: break;
802:
1.101 markus 803: case oEnableSSHKeysign:
804: intptr = &options->enable_ssh_keysign;
805: goto parse_flag;
806:
1.128 markus 807: case oIdentitiesOnly:
808: intptr = &options->identities_only;
809: goto parse_flag;
810:
1.127 markus 811: case oServerAliveInterval:
812: intptr = &options->server_alive_interval;
813: goto parse_time;
814:
815: case oServerAliveCountMax:
816: intptr = &options->server_alive_count_max;
817: goto parse_int;
818:
1.130 djm 819: case oSendEnv:
820: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
821: if (strchr(arg, '=') != NULL)
822: fatal("%s line %d: Invalid environment name.",
823: filename, linenum);
1.137 djm 824: if (!*activep)
825: continue;
1.130 djm 826: if (options->num_send_env >= MAX_SEND_ENV)
827: fatal("%s line %d: too many send env.",
828: filename, linenum);
829: options->send_env[options->num_send_env++] =
830: xstrdup(arg);
831: }
832: break;
833:
1.132 djm 834: case oControlPath:
835: charptr = &options->control_path;
836: goto parse_string;
837:
838: case oControlMaster:
839: intptr = &options->control_master;
1.141 djm 840: arg = strdelim(&s);
841: if (!arg || *arg == '\0')
842: fatal("%.200s line %d: Missing ControlMaster argument.",
843: filename, linenum);
844: value = 0; /* To avoid compiler warning... */
845: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
846: value = SSHCTL_MASTER_YES;
847: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
848: value = SSHCTL_MASTER_NO;
849: else if (strcmp(arg, "auto") == 0)
850: value = SSHCTL_MASTER_AUTO;
851: else if (strcmp(arg, "ask") == 0)
852: value = SSHCTL_MASTER_ASK;
853: else if (strcmp(arg, "autoask") == 0)
854: value = SSHCTL_MASTER_AUTO_ASK;
855: else
856: fatal("%.200s line %d: Bad ControlMaster argument.",
857: filename, linenum);
858: if (*activep && *intptr == -1)
859: *intptr = value;
860: break;
1.132 djm 861:
1.136 djm 862: case oHashKnownHosts:
863: intptr = &options->hash_known_hosts;
864: goto parse_flag;
865:
1.144 reyk 866: case oTunnel:
867: intptr = &options->tun_open;
1.145 reyk 868: arg = strdelim(&s);
869: if (!arg || *arg == '\0')
870: fatal("%s line %d: Missing yes/point-to-point/"
871: "ethernet/no argument.", filename, linenum);
872: value = 0; /* silence compiler */
873: if (strcasecmp(arg, "ethernet") == 0)
874: value = SSH_TUNMODE_ETHERNET;
875: else if (strcasecmp(arg, "point-to-point") == 0)
876: value = SSH_TUNMODE_POINTOPOINT;
877: else if (strcasecmp(arg, "yes") == 0)
878: value = SSH_TUNMODE_DEFAULT;
879: else if (strcasecmp(arg, "no") == 0)
880: value = SSH_TUNMODE_NO;
881: else
882: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
883: "no argument: %s", filename, linenum, arg);
884: if (*activep)
885: *intptr = value;
886: break;
1.144 reyk 887:
888: case oTunnelDevice:
889: arg = strdelim(&s);
890: if (!arg || *arg == '\0')
891: fatal("%.200s line %d: Missing argument.", filename, linenum);
892: value = a2tun(arg, &value2);
1.145 reyk 893: if (value == SSH_TUNID_ERR)
1.144 reyk 894: fatal("%.200s line %d: Bad tun device.", filename, linenum);
895: if (*activep) {
896: options->tun_local = value;
897: options->tun_remote = value2;
898: }
899: break;
900:
901: case oLocalCommand:
902: charptr = &options->local_command;
903: goto parse_command;
904:
905: case oPermitLocalCommand:
906: intptr = &options->permit_local_command;
907: goto parse_flag;
908:
1.96 markus 909: case oDeprecated:
1.98 markus 910: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 911: filename, linenum, keyword);
1.98 markus 912: return 0;
1.96 markus 913:
1.110 jakob 914: case oUnsupported:
915: error("%s line %d: Unsupported option \"%s\"",
916: filename, linenum, keyword);
917: return 0;
918:
1.17 markus 919: default:
920: fatal("process_config_line: Unimplemented opcode %d", opcode);
921: }
922:
923: /* Check that there is no garbage at end of line. */
1.57 djm 924: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 925: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 926: filename, linenum, arg);
1.39 ho 927: }
1.17 markus 928: return 0;
1.1 deraadt 929: }
930:
931:
1.19 markus 932: /*
933: * Reads the config file and modifies the options accordingly. Options
934: * should already be initialized before this call. This never returns if
1.89 stevesk 935: * there is an error. If the file does not exist, this returns 0.
1.19 markus 936: */
1.1 deraadt 937:
1.89 stevesk 938: int
1.134 deraadt 939: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 940: int checkperm)
1.1 deraadt 941: {
1.17 markus 942: FILE *f;
943: char line[1024];
944: int active, linenum;
945: int bad_options = 0;
946:
947: /* Open the file. */
1.129 djm 948: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 949: return 0;
1.129 djm 950:
951: if (checkperm) {
952: struct stat sb;
1.134 deraadt 953:
1.131 dtucker 954: if (fstat(fileno(f), &sb) == -1)
1.129 djm 955: fatal("fstat %s: %s", filename, strerror(errno));
956: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 957: (sb.st_mode & 022) != 0))
1.129 djm 958: fatal("Bad owner or permissions on %s", filename);
959: }
1.17 markus 960:
961: debug("Reading configuration data %.200s", filename);
962:
1.19 markus 963: /*
964: * Mark that we are now processing the options. This flag is turned
965: * on/off by Host specifications.
966: */
1.17 markus 967: active = 1;
968: linenum = 0;
969: while (fgets(line, sizeof(line), f)) {
970: /* Update line number counter. */
971: linenum++;
972: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
973: bad_options++;
974: }
975: fclose(f);
976: if (bad_options > 0)
1.64 millert 977: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 978: filename, bad_options);
1.89 stevesk 979: return 1;
1.1 deraadt 980: }
981:
1.19 markus 982: /*
983: * Initializes options to special values that indicate that they have not yet
984: * been set. Read_config_file will only set options with this value. Options
985: * are processed in the following order: command line, user config file,
986: * system config file. Last, fill_default_options is called.
987: */
1.1 deraadt 988:
1.26 markus 989: void
1.17 markus 990: initialize_options(Options * options)
1.1 deraadt 991: {
1.17 markus 992: memset(options, 'X', sizeof(*options));
993: options->forward_agent = -1;
994: options->forward_x11 = -1;
1.123 markus 995: options->forward_x11_trusted = -1;
1.153 markus 996: options->exit_on_forward_failure = -1;
1.34 markus 997: options->xauth_location = NULL;
1.17 markus 998: options->gateway_ports = -1;
999: options->use_privileged_port = -1;
1000: options->rsa_authentication = -1;
1.50 markus 1001: options->pubkey_authentication = -1;
1.78 markus 1002: options->challenge_response_authentication = -1;
1.118 markus 1003: options->gss_authentication = -1;
1004: options->gss_deleg_creds = -1;
1.17 markus 1005: options->password_authentication = -1;
1.48 markus 1006: options->kbd_interactive_authentication = -1;
1007: options->kbd_interactive_devices = NULL;
1.17 markus 1008: options->rhosts_rsa_authentication = -1;
1.72 markus 1009: options->hostbased_authentication = -1;
1.17 markus 1010: options->batch_mode = -1;
1011: options->check_host_ip = -1;
1012: options->strict_host_key_checking = -1;
1013: options->compression = -1;
1.126 markus 1014: options->tcp_keep_alive = -1;
1.17 markus 1015: options->compression_level = -1;
1016: options->port = -1;
1.114 djm 1017: options->address_family = -1;
1.17 markus 1018: options->connection_attempts = -1;
1.111 djm 1019: options->connection_timeout = -1;
1.17 markus 1020: options->number_of_password_prompts = -1;
1021: options->cipher = -1;
1.25 markus 1022: options->ciphers = NULL;
1.62 markus 1023: options->macs = NULL;
1.76 markus 1024: options->hostkeyalgorithms = NULL;
1.25 markus 1025: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1026: options->num_identity_files = 0;
1027: options->hostname = NULL;
1.52 markus 1028: options->host_key_alias = NULL;
1.17 markus 1029: options->proxy_command = NULL;
1030: options->user = NULL;
1031: options->escape_char = -1;
1032: options->system_hostfile = NULL;
1033: options->user_hostfile = NULL;
1.27 markus 1034: options->system_hostfile2 = NULL;
1035: options->user_hostfile2 = NULL;
1.17 markus 1036: options->num_local_forwards = 0;
1037: options->num_remote_forwards = 0;
1.90 stevesk 1038: options->clear_forwardings = -1;
1.95 markus 1039: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1040: options->preferred_authentications = NULL;
1.77 markus 1041: options->bind_address = NULL;
1.86 markus 1042: options->smartcard_device = NULL;
1.101 markus 1043: options->enable_ssh_keysign = - 1;
1.91 markus 1044: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1045: options->identities_only = - 1;
1.105 markus 1046: options->rekey_limit = - 1;
1.107 jakob 1047: options->verify_host_key_dns = -1;
1.127 markus 1048: options->server_alive_interval = -1;
1049: options->server_alive_count_max = -1;
1.130 djm 1050: options->num_send_env = 0;
1.132 djm 1051: options->control_path = NULL;
1052: options->control_master = -1;
1.136 djm 1053: options->hash_known_hosts = -1;
1.144 reyk 1054: options->tun_open = -1;
1055: options->tun_local = -1;
1056: options->tun_remote = -1;
1057: options->local_command = NULL;
1058: options->permit_local_command = -1;
1.1 deraadt 1059: }
1060:
1.19 markus 1061: /*
1062: * Called after processing other sources of option data, this fills those
1063: * options for which no value has been specified with their default values.
1064: */
1.1 deraadt 1065:
1.26 markus 1066: void
1.17 markus 1067: fill_default_options(Options * options)
1.1 deraadt 1068: {
1.61 deraadt 1069: int len;
1070:
1.17 markus 1071: if (options->forward_agent == -1)
1.33 markus 1072: options->forward_agent = 0;
1.17 markus 1073: if (options->forward_x11 == -1)
1.23 markus 1074: options->forward_x11 = 0;
1.123 markus 1075: if (options->forward_x11_trusted == -1)
1076: options->forward_x11_trusted = 0;
1.153 markus 1077: if (options->exit_on_forward_failure == -1)
1078: options->exit_on_forward_failure = 0;
1.34 markus 1079: if (options->xauth_location == NULL)
1.80 markus 1080: options->xauth_location = _PATH_XAUTH;
1.17 markus 1081: if (options->gateway_ports == -1)
1082: options->gateway_ports = 0;
1083: if (options->use_privileged_port == -1)
1.65 markus 1084: options->use_privileged_port = 0;
1.17 markus 1085: if (options->rsa_authentication == -1)
1086: options->rsa_authentication = 1;
1.50 markus 1087: if (options->pubkey_authentication == -1)
1088: options->pubkey_authentication = 1;
1.78 markus 1089: if (options->challenge_response_authentication == -1)
1.83 markus 1090: options->challenge_response_authentication = 1;
1.118 markus 1091: if (options->gss_authentication == -1)
1.122 markus 1092: options->gss_authentication = 0;
1.118 markus 1093: if (options->gss_deleg_creds == -1)
1094: options->gss_deleg_creds = 0;
1.17 markus 1095: if (options->password_authentication == -1)
1096: options->password_authentication = 1;
1.48 markus 1097: if (options->kbd_interactive_authentication == -1)
1.59 markus 1098: options->kbd_interactive_authentication = 1;
1.17 markus 1099: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1100: options->rhosts_rsa_authentication = 0;
1.72 markus 1101: if (options->hostbased_authentication == -1)
1102: options->hostbased_authentication = 0;
1.17 markus 1103: if (options->batch_mode == -1)
1104: options->batch_mode = 0;
1105: if (options->check_host_ip == -1)
1106: options->check_host_ip = 1;
1107: if (options->strict_host_key_checking == -1)
1108: options->strict_host_key_checking = 2; /* 2 is default */
1109: if (options->compression == -1)
1110: options->compression = 0;
1.126 markus 1111: if (options->tcp_keep_alive == -1)
1112: options->tcp_keep_alive = 1;
1.17 markus 1113: if (options->compression_level == -1)
1114: options->compression_level = 6;
1115: if (options->port == -1)
1116: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1117: if (options->address_family == -1)
1118: options->address_family = AF_UNSPEC;
1.17 markus 1119: if (options->connection_attempts == -1)
1.84 markus 1120: options->connection_attempts = 1;
1.17 markus 1121: if (options->number_of_password_prompts == -1)
1122: options->number_of_password_prompts = 3;
1123: /* Selected in ssh_login(). */
1124: if (options->cipher == -1)
1125: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1126: /* options->ciphers, default set in myproposals.h */
1.62 markus 1127: /* options->macs, default set in myproposals.h */
1.76 markus 1128: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1129: if (options->protocol == SSH_PROTO_UNKNOWN)
1.69 markus 1130: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
1.17 markus 1131: if (options->num_identity_files == 0) {
1.50 markus 1132: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1133: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1134: options->identity_files[options->num_identity_files] =
1.61 deraadt 1135: xmalloc(len);
1136: snprintf(options->identity_files[options->num_identity_files++],
1137: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1138: }
1139: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1140: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1141: options->identity_files[options->num_identity_files] =
1142: xmalloc(len);
1143: snprintf(options->identity_files[options->num_identity_files++],
1144: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1145:
1.61 deraadt 1146: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1147: options->identity_files[options->num_identity_files] =
1.61 deraadt 1148: xmalloc(len);
1149: snprintf(options->identity_files[options->num_identity_files++],
1150: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.50 markus 1151: }
1.27 markus 1152: }
1.17 markus 1153: if (options->escape_char == -1)
1154: options->escape_char = '~';
1155: if (options->system_hostfile == NULL)
1.55 markus 1156: options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
1.17 markus 1157: if (options->user_hostfile == NULL)
1.55 markus 1158: options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
1.27 markus 1159: if (options->system_hostfile2 == NULL)
1.55 markus 1160: options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
1.27 markus 1161: if (options->user_hostfile2 == NULL)
1.55 markus 1162: options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
1.95 markus 1163: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1164: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1165: if (options->clear_forwardings == 1)
1166: clear_forwardings(options);
1.91 markus 1167: if (options->no_host_authentication_for_localhost == - 1)
1168: options->no_host_authentication_for_localhost = 0;
1.128 markus 1169: if (options->identities_only == -1)
1170: options->identities_only = 0;
1.101 markus 1171: if (options->enable_ssh_keysign == -1)
1172: options->enable_ssh_keysign = 0;
1.105 markus 1173: if (options->rekey_limit == -1)
1174: options->rekey_limit = 0;
1.107 jakob 1175: if (options->verify_host_key_dns == -1)
1176: options->verify_host_key_dns = 0;
1.127 markus 1177: if (options->server_alive_interval == -1)
1178: options->server_alive_interval = 0;
1179: if (options->server_alive_count_max == -1)
1180: options->server_alive_count_max = 3;
1.132 djm 1181: if (options->control_master == -1)
1182: options->control_master = 0;
1.136 djm 1183: if (options->hash_known_hosts == -1)
1184: options->hash_known_hosts = 0;
1.144 reyk 1185: if (options->tun_open == -1)
1.145 reyk 1186: options->tun_open = SSH_TUNMODE_NO;
1187: if (options->tun_local == -1)
1188: options->tun_local = SSH_TUNID_ANY;
1189: if (options->tun_remote == -1)
1190: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1191: if (options->permit_local_command == -1)
1192: options->permit_local_command = 0;
1193: /* options->local_command should not be set by default */
1.17 markus 1194: /* options->proxy_command should not be set by default */
1195: /* options->user will be set in the main program if appropriate */
1196: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1197: /* options->host_key_alias should not be set by default */
1.67 markus 1198: /* options->preferred_authentications will be set in ssh */
1.135 djm 1199: }
1200:
1201: /*
1202: * parse_forward
1203: * parses a string containing a port forwarding specification of the form:
1204: * [listenhost:]listenport:connecthost:connectport
1205: * returns number of arguments parsed or zero on error
1206: */
1207: int
1208: parse_forward(Forward *fwd, const char *fwdspec)
1209: {
1210: int i;
1211: char *p, *cp, *fwdarg[4];
1212:
1213: memset(fwd, '\0', sizeof(*fwd));
1214:
1215: cp = p = xstrdup(fwdspec);
1216:
1217: /* skip leading spaces */
1218: while (*cp && isspace(*cp))
1219: cp++;
1220:
1221: for (i = 0; i < 4; ++i)
1222: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1223: break;
1224:
1225: /* Check for trailing garbage in 4-arg case*/
1226: if (cp != NULL)
1227: i = 0; /* failure */
1228:
1229: switch (i) {
1230: case 3:
1231: fwd->listen_host = NULL;
1232: fwd->listen_port = a2port(fwdarg[0]);
1233: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1234: fwd->connect_port = a2port(fwdarg[2]);
1235: break;
1236:
1237: case 4:
1238: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1239: fwd->listen_port = a2port(fwdarg[1]);
1240: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1241: fwd->connect_port = a2port(fwdarg[3]);
1242: break;
1243: default:
1244: i = 0; /* failure */
1245: }
1246:
1247: xfree(p);
1248:
1249: if (fwd->listen_port == 0 && fwd->connect_port == 0)
1250: goto fail_free;
1251:
1252: if (fwd->connect_host != NULL &&
1253: strlen(fwd->connect_host) >= NI_MAXHOST)
1254: goto fail_free;
1255:
1256: return (i);
1257:
1258: fail_free:
1259: if (fwd->connect_host != NULL)
1260: xfree(fwd->connect_host);
1261: if (fwd->listen_host != NULL)
1262: xfree(fwd->listen_host);
1263: return (0);
1.1 deraadt 1264: }
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