Annotation of src/usr.bin/ssh/readconf.c, Revision 1.152
1.152 ! stevesk 1: /* $OpenBSD: readconf.c,v 1.151 2006/03/25 13:17:02 djm Exp $ */
1.1 deraadt 2: /*
1.18 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Functions for reading the configuration files.
1.26 markus 7: *
1.46 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 13: */
1.1 deraadt 14:
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>
1.1 deraadt 24:
25: #include "ssh.h"
26: #include "xmalloc.h"
1.25 markus 27: #include "compat.h"
1.58 markus 28: #include "cipher.h"
1.55 markus 29: #include "pathnames.h"
1.58 markus 30: #include "log.h"
31: #include "readconf.h"
32: #include "match.h"
33: #include "misc.h"
1.62 markus 34: #include "kex.h"
35: #include "mac.h"
1.1 deraadt 36:
37: /* Format of the configuration file:
38:
39: # Configuration data is parsed as follows:
40: # 1. command line options
41: # 2. user-specific file
42: # 3. system-wide file
43: # Any configuration value is only changed the first time it is set.
44: # Thus, host-specific definitions should be at the beginning of the
45: # configuration file, and defaults at the end.
46:
47: # Host-specific declarations. These may override anything above. A single
48: # host may match multiple declarations; these are processed in the order
49: # that they are given in.
50:
51: Host *.ngs.fi ngs.fi
1.96 markus 52: User foo
1.1 deraadt 53:
54: Host fake.com
55: HostName another.host.name.real.org
56: User blaah
57: Port 34289
58: ForwardX11 no
59: ForwardAgent no
60:
61: Host books.com
62: RemoteForward 9999 shadows.cs.hut.fi:9999
63: Cipher 3des
64:
65: Host fascist.blob.com
66: Port 23123
67: User tylonen
68: PasswordAuthentication no
69:
70: Host puukko.hut.fi
71: User t35124p
72: ProxyCommand ssh-proxy %h %p
73:
74: Host *.fr
1.96 markus 75: PublicKeyAuthentication no
1.1 deraadt 76:
77: Host *.su
78: Cipher none
79: PasswordAuthentication no
80:
1.144 reyk 81: Host vpn.fake.com
82: Tunnel yes
83: TunnelDevice 3
84:
1.1 deraadt 85: # Defaults for various options
86: Host *
87: ForwardAgent no
1.50 markus 88: ForwardX11 no
1.1 deraadt 89: PasswordAuthentication yes
90: RSAAuthentication yes
91: RhostsRSAAuthentication yes
92: StrictHostKeyChecking yes
1.126 markus 93: TcpKeepAlive no
1.1 deraadt 94: IdentityFile ~/.ssh/identity
95: Port 22
96: EscapeChar ~
97:
98: */
99:
100: /* Keyword tokens. */
101:
1.17 markus 102: typedef enum {
103: oBadOption,
1.123 markus 104: oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts,
1.100 deraadt 105: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 106: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 107: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
108: oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
109: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
110: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 111: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 112: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 113: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 114: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 115: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.90 stevesk 116: oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
1.96 markus 117: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 118: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 119: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 120: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.136 djm 121: oSendEnv, oControlPath, oControlMaster, oHashKnownHosts,
1.144 reyk 122: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.110 jakob 123: oDeprecated, oUnsupported
1.1 deraadt 124: } OpCodes;
125:
126: /* Textual representations of the tokens. */
127:
1.17 markus 128: static struct {
129: const char *name;
130: OpCodes opcode;
131: } keywords[] = {
132: { "forwardagent", oForwardAgent },
133: { "forwardx11", oForwardX11 },
1.123 markus 134: { "forwardx11trusted", oForwardX11Trusted },
1.34 markus 135: { "xauthlocation", oXAuthLocation },
1.17 markus 136: { "gatewayports", oGatewayPorts },
137: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 138: { "rhostsauthentication", oDeprecated },
1.17 markus 139: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 140: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
141: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 142: { "rsaauthentication", oRSAAuthentication },
1.50 markus 143: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 144: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 145: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 146: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 147: { "challengeresponseauthentication", oChallengeResponseAuthentication },
148: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
149: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 150: { "kerberosauthentication", oUnsupported },
151: { "kerberostgtpassing", oUnsupported },
152: { "afstokenpassing", oUnsupported },
1.118 markus 153: #if defined(GSSAPI)
154: { "gssapiauthentication", oGssAuthentication },
155: { "gssapidelegatecredentials", oGssDelegateCreds },
156: #else
157: { "gssapiauthentication", oUnsupported },
158: { "gssapidelegatecredentials", oUnsupported },
159: #endif
1.96 markus 160: { "fallbacktorsh", oDeprecated },
161: { "usersh", oDeprecated },
1.17 markus 162: { "identityfile", oIdentityFile },
1.50 markus 163: { "identityfile2", oIdentityFile }, /* alias */
1.128 markus 164: { "identitiesonly", oIdentitiesOnly },
1.17 markus 165: { "hostname", oHostName },
1.52 markus 166: { "hostkeyalias", oHostKeyAlias },
1.17 markus 167: { "proxycommand", oProxyCommand },
168: { "port", oPort },
169: { "cipher", oCipher },
1.25 markus 170: { "ciphers", oCiphers },
1.62 markus 171: { "macs", oMacs },
1.25 markus 172: { "protocol", oProtocol },
1.17 markus 173: { "remoteforward", oRemoteForward },
174: { "localforward", oLocalForward },
175: { "user", oUser },
176: { "host", oHost },
177: { "escapechar", oEscapeChar },
178: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.81 markus 179: { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */
1.27 markus 180: { "globalknownhostsfile2", oGlobalKnownHostsFile2 },
1.81 markus 181: { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
1.17 markus 182: { "connectionattempts", oConnectionAttempts },
183: { "batchmode", oBatchMode },
184: { "checkhostip", oCheckHostIP },
185: { "stricthostkeychecking", oStrictHostKeyChecking },
186: { "compression", oCompression },
187: { "compressionlevel", oCompressionLevel },
1.126 markus 188: { "tcpkeepalive", oTCPKeepAlive },
189: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 190: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
191: { "loglevel", oLogLevel },
1.71 markus 192: { "dynamicforward", oDynamicForward },
1.67 markus 193: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 194: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 195: { "bindaddress", oBindAddress },
1.110 jakob 196: #ifdef SMARTCARD
1.85 jakob 197: { "smartcarddevice", oSmartcardDevice },
1.110 jakob 198: #else
199: { "smartcarddevice", oUnsupported },
200: #endif
1.93 deraadt 201: { "clearallforwardings", oClearAllForwardings },
1.101 markus 202: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 203: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 204: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 205: { "rekeylimit", oRekeyLimit },
1.111 djm 206: { "connecttimeout", oConnectTimeout },
1.112 djm 207: { "addressfamily", oAddressFamily },
1.127 markus 208: { "serveraliveinterval", oServerAliveInterval },
209: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 210: { "sendenv", oSendEnv },
1.132 djm 211: { "controlpath", oControlPath },
212: { "controlmaster", oControlMaster },
1.136 djm 213: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 214: { "tunnel", oTunnel },
215: { "tunneldevice", oTunnelDevice },
216: { "localcommand", oLocalCommand },
217: { "permitlocalcommand", oPermitLocalCommand },
1.92 stevesk 218: { NULL, oBadOption }
1.13 markus 219: };
220:
1.19 markus 221: /*
222: * Adds a local TCP/IP port forward to options. Never returns if there is an
223: * error.
224: */
1.1 deraadt 225:
1.26 markus 226: void
1.135 djm 227: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 228: {
1.17 markus 229: Forward *fwd;
230: extern uid_t original_real_uid;
1.135 djm 231: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 232: fatal("Privileged ports can only be forwarded by root.");
1.17 markus 233: if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
234: fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
235: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 236:
237: fwd->listen_host = (newfwd->listen_host == NULL) ?
238: NULL : xstrdup(newfwd->listen_host);
239: fwd->listen_port = newfwd->listen_port;
240: fwd->connect_host = xstrdup(newfwd->connect_host);
241: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 242: }
243:
1.19 markus 244: /*
245: * Adds a remote TCP/IP port forward to options. Never returns if there is
246: * an error.
247: */
1.1 deraadt 248:
1.26 markus 249: void
1.135 djm 250: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 251: {
1.17 markus 252: Forward *fwd;
253: if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
254: fatal("Too many remote forwards (max %d).",
1.93 deraadt 255: SSH_MAX_FORWARDS_PER_DIRECTION);
1.17 markus 256: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 257:
258: fwd->listen_host = (newfwd->listen_host == NULL) ?
259: NULL : xstrdup(newfwd->listen_host);
260: fwd->listen_port = newfwd->listen_port;
261: fwd->connect_host = xstrdup(newfwd->connect_host);
262: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 263: }
264:
1.90 stevesk 265: static void
266: clear_forwardings(Options *options)
267: {
268: int i;
269:
1.135 djm 270: for (i = 0; i < options->num_local_forwards; i++) {
1.138 dtucker 271: if (options->local_forwards[i].listen_host != NULL)
272: xfree(options->local_forwards[i].listen_host);
1.135 djm 273: xfree(options->local_forwards[i].connect_host);
274: }
1.90 stevesk 275: options->num_local_forwards = 0;
1.135 djm 276: for (i = 0; i < options->num_remote_forwards; i++) {
1.138 dtucker 277: if (options->remote_forwards[i].listen_host != NULL)
278: xfree(options->remote_forwards[i].listen_host);
1.135 djm 279: xfree(options->remote_forwards[i].connect_host);
280: }
1.90 stevesk 281: options->num_remote_forwards = 0;
1.145 reyk 282: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 283: }
284:
1.19 markus 285: /*
1.70 stevesk 286: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 287: */
1.1 deraadt 288:
1.26 markus 289: static OpCodes
1.17 markus 290: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 291: {
1.51 markus 292: u_int i;
1.1 deraadt 293:
1.17 markus 294: for (i = 0; keywords[i].name; i++)
1.20 markus 295: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 296: return keywords[i].opcode;
297:
1.75 stevesk 298: error("%s: line %d: Bad configuration option: %s",
299: filename, linenum, cp);
1.17 markus 300: return oBadOption;
1.1 deraadt 301: }
302:
1.19 markus 303: /*
304: * Processes a single option line as used in the configuration files. This
305: * only sets those values that have not already been set.
306: */
1.102 markus 307: #define WHITESPACE " \t\r\n"
1.1 deraadt 308:
1.14 markus 309: int
310: process_config_line(Options *options, const char *host,
1.17 markus 311: char *line, const char *filename, int linenum,
312: int *activep)
1.1 deraadt 313: {
1.135 djm 314: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
1.146 djm 315: int opcode, *intptr, value, value2, scale;
316: long long orig, val64;
1.102 markus 317: size_t len;
1.135 djm 318: Forward fwd;
1.106 djm 319:
320: /* Strip trailing whitespace */
1.139 deraadt 321: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 322: if (strchr(WHITESPACE, line[len]) == NULL)
323: break;
324: line[len] = '\0';
325: }
1.1 deraadt 326:
1.42 provos 327: s = line;
328: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 329: if ((keyword = strdelim(&s)) == NULL)
330: return 0;
1.42 provos 331: /* Ignore leading whitespace. */
332: if (*keyword == '\0')
1.43 markus 333: keyword = strdelim(&s);
1.56 deraadt 334: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 335: return 0;
336:
1.38 provos 337: opcode = parse_token(keyword, filename, linenum);
1.17 markus 338:
339: switch (opcode) {
340: case oBadOption:
1.19 markus 341: /* don't panic, but count bad options */
342: return -1;
1.17 markus 343: /* NOTREACHED */
1.111 djm 344: case oConnectTimeout:
345: intptr = &options->connection_timeout;
1.127 markus 346: parse_time:
1.111 djm 347: arg = strdelim(&s);
348: if (!arg || *arg == '\0')
349: fatal("%s line %d: missing time value.",
350: filename, linenum);
351: if ((value = convtime(arg)) == -1)
352: fatal("%s line %d: invalid time value.",
353: filename, linenum);
354: if (*intptr == -1)
355: *intptr = value;
356: break;
357:
1.17 markus 358: case oForwardAgent:
359: intptr = &options->forward_agent;
360: parse_flag:
1.42 provos 361: arg = strdelim(&s);
1.40 ho 362: if (!arg || *arg == '\0')
1.17 markus 363: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
364: value = 0; /* To avoid compiler warning... */
1.38 provos 365: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 366: value = 1;
1.38 provos 367: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 368: value = 0;
369: else
370: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
371: if (*activep && *intptr == -1)
372: *intptr = value;
373: break;
374:
375: case oForwardX11:
376: intptr = &options->forward_x11;
377: goto parse_flag;
378:
1.123 markus 379: case oForwardX11Trusted:
380: intptr = &options->forward_x11_trusted;
381: goto parse_flag;
382:
1.17 markus 383: case oGatewayPorts:
384: intptr = &options->gateway_ports;
385: goto parse_flag;
386:
387: case oUsePrivilegedPort:
388: intptr = &options->use_privileged_port;
389: goto parse_flag;
390:
391: case oPasswordAuthentication:
392: intptr = &options->password_authentication;
393: goto parse_flag;
394:
1.48 markus 395: case oKbdInteractiveAuthentication:
396: intptr = &options->kbd_interactive_authentication;
397: goto parse_flag;
398:
399: case oKbdInteractiveDevices:
400: charptr = &options->kbd_interactive_devices;
401: goto parse_string;
402:
1.50 markus 403: case oPubkeyAuthentication:
404: intptr = &options->pubkey_authentication;
1.30 markus 405: goto parse_flag;
406:
1.17 markus 407: case oRSAAuthentication:
408: intptr = &options->rsa_authentication;
409: goto parse_flag;
410:
411: case oRhostsRSAAuthentication:
412: intptr = &options->rhosts_rsa_authentication;
413: goto parse_flag;
414:
1.72 markus 415: case oHostbasedAuthentication:
416: intptr = &options->hostbased_authentication;
417: goto parse_flag;
418:
1.59 markus 419: case oChallengeResponseAuthentication:
1.78 markus 420: intptr = &options->challenge_response_authentication;
1.17 markus 421: goto parse_flag;
1.108 jakob 422:
1.118 markus 423: case oGssAuthentication:
424: intptr = &options->gss_authentication;
425: goto parse_flag;
426:
427: case oGssDelegateCreds:
428: intptr = &options->gss_deleg_creds;
429: goto parse_flag;
430:
1.17 markus 431: case oBatchMode:
432: intptr = &options->batch_mode;
433: goto parse_flag;
434:
435: case oCheckHostIP:
436: intptr = &options->check_host_ip;
437: goto parse_flag;
438:
1.107 jakob 439: case oVerifyHostKeyDNS:
440: intptr = &options->verify_host_key_dns;
1.125 jakob 441: goto parse_yesnoask;
1.107 jakob 442:
1.17 markus 443: case oStrictHostKeyChecking:
444: intptr = &options->strict_host_key_checking;
1.125 jakob 445: parse_yesnoask:
1.42 provos 446: arg = strdelim(&s);
1.40 ho 447: if (!arg || *arg == '\0')
1.60 stevesk 448: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 449: filename, linenum);
1.17 markus 450: value = 0; /* To avoid compiler warning... */
1.38 provos 451: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 452: value = 1;
1.38 provos 453: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 454: value = 0;
1.38 provos 455: else if (strcmp(arg, "ask") == 0)
1.17 markus 456: value = 2;
457: else
458: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
459: if (*activep && *intptr == -1)
460: *intptr = value;
461: break;
462:
463: case oCompression:
464: intptr = &options->compression;
465: goto parse_flag;
466:
1.126 markus 467: case oTCPKeepAlive:
468: intptr = &options->tcp_keep_alive;
1.17 markus 469: goto parse_flag;
470:
1.91 markus 471: case oNoHostAuthenticationForLocalhost:
472: intptr = &options->no_host_authentication_for_localhost;
473: goto parse_flag;
474:
1.17 markus 475: case oNumberOfPasswordPrompts:
476: intptr = &options->number_of_password_prompts;
477: goto parse_int;
478:
479: case oCompressionLevel:
480: intptr = &options->compression_level;
481: goto parse_int;
482:
1.105 markus 483: case oRekeyLimit:
484: intptr = &options->rekey_limit;
485: arg = strdelim(&s);
486: if (!arg || *arg == '\0')
487: fatal("%.200s line %d: Missing argument.", filename, linenum);
488: if (arg[0] < '0' || arg[0] > '9')
489: fatal("%.200s line %d: Bad number.", filename, linenum);
1.146 djm 490: orig = val64 = strtoll(arg, &endofnumber, 10);
1.105 markus 491: if (arg == endofnumber)
492: fatal("%.200s line %d: Bad number.", filename, linenum);
493: switch (toupper(*endofnumber)) {
1.146 djm 494: case '\0':
495: scale = 1;
496: break;
1.105 markus 497: case 'K':
1.146 djm 498: scale = 1<<10;
1.105 markus 499: break;
500: case 'M':
1.146 djm 501: scale = 1<<20;
1.105 markus 502: break;
503: case 'G':
1.146 djm 504: scale = 1<<30;
1.105 markus 505: break;
1.146 djm 506: default:
507: fatal("%.200s line %d: Invalid RekeyLimit suffix",
508: filename, linenum);
1.105 markus 509: }
1.146 djm 510: val64 *= scale;
511: /* detect integer wrap and too-large limits */
512: if ((val64 / scale) != orig || val64 > INT_MAX)
513: fatal("%.200s line %d: RekeyLimit too large",
514: filename, linenum);
515: if (val64 < 16)
516: fatal("%.200s line %d: RekeyLimit too small",
517: filename, linenum);
1.105 markus 518: if (*activep && *intptr == -1)
1.146 djm 519: *intptr = (int)val64;
1.105 markus 520: break;
521:
1.17 markus 522: case oIdentityFile:
1.42 provos 523: arg = strdelim(&s);
1.40 ho 524: if (!arg || *arg == '\0')
1.17 markus 525: fatal("%.200s line %d: Missing argument.", filename, linenum);
526: if (*activep) {
1.50 markus 527: intptr = &options->num_identity_files;
1.27 markus 528: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 529: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 530: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.50 markus 531: charptr = &options->identity_files[*intptr];
1.38 provos 532: *charptr = xstrdup(arg);
1.27 markus 533: *intptr = *intptr + 1;
1.17 markus 534: }
535: break;
536:
1.34 markus 537: case oXAuthLocation:
538: charptr=&options->xauth_location;
539: goto parse_string;
540:
1.17 markus 541: case oUser:
542: charptr = &options->user;
543: parse_string:
1.42 provos 544: arg = strdelim(&s);
1.40 ho 545: if (!arg || *arg == '\0')
1.17 markus 546: fatal("%.200s line %d: Missing argument.", filename, linenum);
547: if (*activep && *charptr == NULL)
1.38 provos 548: *charptr = xstrdup(arg);
1.17 markus 549: break;
550:
551: case oGlobalKnownHostsFile:
552: charptr = &options->system_hostfile;
553: goto parse_string;
554:
555: case oUserKnownHostsFile:
556: charptr = &options->user_hostfile;
557: goto parse_string;
558:
1.27 markus 559: case oGlobalKnownHostsFile2:
560: charptr = &options->system_hostfile2;
561: goto parse_string;
562:
563: case oUserKnownHostsFile2:
564: charptr = &options->user_hostfile2;
565: goto parse_string;
566:
1.17 markus 567: case oHostName:
568: charptr = &options->hostname;
569: goto parse_string;
570:
1.52 markus 571: case oHostKeyAlias:
572: charptr = &options->host_key_alias;
573: goto parse_string;
574:
1.67 markus 575: case oPreferredAuthentications:
576: charptr = &options->preferred_authentications;
577: goto parse_string;
578:
1.77 markus 579: case oBindAddress:
580: charptr = &options->bind_address;
581: goto parse_string;
582:
1.85 jakob 583: case oSmartcardDevice:
1.86 markus 584: charptr = &options->smartcard_device;
585: goto parse_string;
1.85 jakob 586:
1.17 markus 587: case oProxyCommand:
1.144 reyk 588: charptr = &options->proxy_command;
589: parse_command:
1.113 markus 590: if (s == NULL)
591: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 592: len = strspn(s, WHITESPACE "=");
1.17 markus 593: if (*activep && *charptr == NULL)
1.102 markus 594: *charptr = xstrdup(s + len);
1.17 markus 595: return 0;
596:
597: case oPort:
598: intptr = &options->port;
599: parse_int:
1.42 provos 600: arg = strdelim(&s);
1.40 ho 601: if (!arg || *arg == '\0')
1.17 markus 602: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 603: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 604: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 605:
606: /* Octal, decimal, or hex format? */
1.38 provos 607: value = strtol(arg, &endofnumber, 0);
608: if (arg == endofnumber)
1.21 markus 609: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 610: if (*activep && *intptr == -1)
611: *intptr = value;
612: break;
613:
614: case oConnectionAttempts:
615: intptr = &options->connection_attempts;
616: goto parse_int;
617:
618: case oCipher:
619: intptr = &options->cipher;
1.42 provos 620: arg = strdelim(&s);
1.40 ho 621: if (!arg || *arg == '\0')
1.32 markus 622: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 623: value = cipher_number(arg);
1.17 markus 624: if (value == -1)
625: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 626: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 627: if (*activep && *intptr == -1)
628: *intptr = value;
629: break;
630:
1.25 markus 631: case oCiphers:
1.42 provos 632: arg = strdelim(&s);
1.40 ho 633: if (!arg || *arg == '\0')
1.32 markus 634: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 635: if (!ciphers_valid(arg))
1.31 markus 636: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 637: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 638: if (*activep && options->ciphers == NULL)
1.38 provos 639: options->ciphers = xstrdup(arg);
1.25 markus 640: break;
641:
1.62 markus 642: case oMacs:
643: arg = strdelim(&s);
644: if (!arg || *arg == '\0')
645: fatal("%.200s line %d: Missing argument.", filename, linenum);
646: if (!mac_valid(arg))
647: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 648: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 649: if (*activep && options->macs == NULL)
650: options->macs = xstrdup(arg);
651: break;
652:
1.76 markus 653: case oHostKeyAlgorithms:
654: arg = strdelim(&s);
655: if (!arg || *arg == '\0')
656: fatal("%.200s line %d: Missing argument.", filename, linenum);
657: if (!key_names_valid2(arg))
658: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 659: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 660: if (*activep && options->hostkeyalgorithms == NULL)
661: options->hostkeyalgorithms = xstrdup(arg);
662: break;
663:
1.25 markus 664: case oProtocol:
665: intptr = &options->protocol;
1.42 provos 666: arg = strdelim(&s);
1.40 ho 667: if (!arg || *arg == '\0')
1.32 markus 668: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 669: value = proto_spec(arg);
1.25 markus 670: if (value == SSH_PROTO_UNKNOWN)
671: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 672: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 673: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
674: *intptr = value;
675: break;
676:
1.17 markus 677: case oLogLevel:
678: intptr = (int *) &options->log_level;
1.42 provos 679: arg = strdelim(&s);
1.38 provos 680: value = log_level_number(arg);
1.95 markus 681: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 682: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 683: filename, linenum, arg ? arg : "<NONE>");
1.95 markus 684: if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET)
1.17 markus 685: *intptr = (LogLevel) value;
686: break;
687:
1.88 stevesk 688: case oLocalForward:
1.17 markus 689: case oRemoteForward:
1.42 provos 690: arg = strdelim(&s);
1.135 djm 691: if (arg == NULL || *arg == '\0')
1.88 stevesk 692: fatal("%.200s line %d: Missing port argument.",
693: filename, linenum);
1.135 djm 694: arg2 = strdelim(&s);
695: if (arg2 == NULL || *arg2 == '\0')
696: fatal("%.200s line %d: Missing target argument.",
1.88 stevesk 697: filename, linenum);
1.135 djm 698:
699: /* construct a string for parse_forward */
700: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
701:
702: if (parse_forward(&fwd, fwdarg) == 0)
1.88 stevesk 703: fatal("%.200s line %d: Bad forwarding specification.",
704: filename, linenum);
1.135 djm 705:
1.88 stevesk 706: if (*activep) {
707: if (opcode == oLocalForward)
1.135 djm 708: add_local_forward(options, &fwd);
1.88 stevesk 709: else if (opcode == oRemoteForward)
1.135 djm 710: add_remote_forward(options, &fwd);
1.88 stevesk 711: }
1.17 markus 712: break;
1.71 markus 713:
714: case oDynamicForward:
715: arg = strdelim(&s);
716: if (!arg || *arg == '\0')
717: fatal("%.200s line %d: Missing port argument.",
718: filename, linenum);
1.135 djm 719: memset(&fwd, '\0', sizeof(fwd));
720: fwd.connect_host = "socks";
721: fwd.listen_host = hpdelim(&arg);
722: if (fwd.listen_host == NULL ||
723: strlen(fwd.listen_host) >= NI_MAXHOST)
724: fatal("%.200s line %d: Bad forwarding specification.",
725: filename, linenum);
726: if (arg) {
727: fwd.listen_port = a2port(arg);
728: fwd.listen_host = cleanhostname(fwd.listen_host);
729: } else {
730: fwd.listen_port = a2port(fwd.listen_host);
1.143 djm 731: fwd.listen_host = NULL;
1.135 djm 732: }
733: if (fwd.listen_port == 0)
1.71 markus 734: fatal("%.200s line %d: Badly formatted port number.",
735: filename, linenum);
1.87 markus 736: if (*activep)
1.135 djm 737: add_local_forward(options, &fwd);
1.72 markus 738: break;
1.17 markus 739:
1.90 stevesk 740: case oClearAllForwardings:
741: intptr = &options->clear_forwardings;
742: goto parse_flag;
743:
1.17 markus 744: case oHost:
745: *activep = 0;
1.42 provos 746: while ((arg = strdelim(&s)) != NULL && *arg != '\0')
1.38 provos 747: if (match_pattern(host, arg)) {
748: debug("Applying options for %.100s", arg);
1.17 markus 749: *activep = 1;
750: break;
751: }
1.42 provos 752: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 753: return 0;
754:
755: case oEscapeChar:
756: intptr = &options->escape_char;
1.42 provos 757: arg = strdelim(&s);
1.40 ho 758: if (!arg || *arg == '\0')
1.17 markus 759: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 760: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 761: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
762: value = (u_char) arg[1] & 31;
1.38 provos 763: else if (strlen(arg) == 1)
1.51 markus 764: value = (u_char) arg[0];
1.38 provos 765: else if (strcmp(arg, "none") == 0)
1.79 stevesk 766: value = SSH_ESCAPECHAR_NONE;
1.17 markus 767: else {
768: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 769: filename, linenum);
1.17 markus 770: /* NOTREACHED */
771: value = 0; /* Avoid compiler warning. */
772: }
773: if (*activep && *intptr == -1)
774: *intptr = value;
1.112 djm 775: break;
776:
777: case oAddressFamily:
778: arg = strdelim(&s);
1.140 markus 779: if (!arg || *arg == '\0')
780: fatal("%s line %d: missing address family.",
781: filename, linenum);
1.114 djm 782: intptr = &options->address_family;
1.112 djm 783: if (strcasecmp(arg, "inet") == 0)
1.114 djm 784: value = AF_INET;
1.112 djm 785: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 786: value = AF_INET6;
1.112 djm 787: else if (strcasecmp(arg, "any") == 0)
1.114 djm 788: value = AF_UNSPEC;
1.112 djm 789: else
790: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 791: if (*activep && *intptr == -1)
792: *intptr = value;
1.17 markus 793: break;
794:
1.101 markus 795: case oEnableSSHKeysign:
796: intptr = &options->enable_ssh_keysign;
797: goto parse_flag;
798:
1.128 markus 799: case oIdentitiesOnly:
800: intptr = &options->identities_only;
801: goto parse_flag;
802:
1.127 markus 803: case oServerAliveInterval:
804: intptr = &options->server_alive_interval;
805: goto parse_time;
806:
807: case oServerAliveCountMax:
808: intptr = &options->server_alive_count_max;
809: goto parse_int;
810:
1.130 djm 811: case oSendEnv:
812: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
813: if (strchr(arg, '=') != NULL)
814: fatal("%s line %d: Invalid environment name.",
815: filename, linenum);
1.137 djm 816: if (!*activep)
817: continue;
1.130 djm 818: if (options->num_send_env >= MAX_SEND_ENV)
819: fatal("%s line %d: too many send env.",
820: filename, linenum);
821: options->send_env[options->num_send_env++] =
822: xstrdup(arg);
823: }
824: break;
825:
1.132 djm 826: case oControlPath:
827: charptr = &options->control_path;
828: goto parse_string;
829:
830: case oControlMaster:
831: intptr = &options->control_master;
1.141 djm 832: arg = strdelim(&s);
833: if (!arg || *arg == '\0')
834: fatal("%.200s line %d: Missing ControlMaster argument.",
835: filename, linenum);
836: value = 0; /* To avoid compiler warning... */
837: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
838: value = SSHCTL_MASTER_YES;
839: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
840: value = SSHCTL_MASTER_NO;
841: else if (strcmp(arg, "auto") == 0)
842: value = SSHCTL_MASTER_AUTO;
843: else if (strcmp(arg, "ask") == 0)
844: value = SSHCTL_MASTER_ASK;
845: else if (strcmp(arg, "autoask") == 0)
846: value = SSHCTL_MASTER_AUTO_ASK;
847: else
848: fatal("%.200s line %d: Bad ControlMaster argument.",
849: filename, linenum);
850: if (*activep && *intptr == -1)
851: *intptr = value;
852: break;
1.132 djm 853:
1.136 djm 854: case oHashKnownHosts:
855: intptr = &options->hash_known_hosts;
856: goto parse_flag;
857:
1.144 reyk 858: case oTunnel:
859: intptr = &options->tun_open;
1.145 reyk 860: arg = strdelim(&s);
861: if (!arg || *arg == '\0')
862: fatal("%s line %d: Missing yes/point-to-point/"
863: "ethernet/no argument.", filename, linenum);
864: value = 0; /* silence compiler */
865: if (strcasecmp(arg, "ethernet") == 0)
866: value = SSH_TUNMODE_ETHERNET;
867: else if (strcasecmp(arg, "point-to-point") == 0)
868: value = SSH_TUNMODE_POINTOPOINT;
869: else if (strcasecmp(arg, "yes") == 0)
870: value = SSH_TUNMODE_DEFAULT;
871: else if (strcasecmp(arg, "no") == 0)
872: value = SSH_TUNMODE_NO;
873: else
874: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
875: "no argument: %s", filename, linenum, arg);
876: if (*activep)
877: *intptr = value;
878: break;
1.144 reyk 879:
880: case oTunnelDevice:
881: arg = strdelim(&s);
882: if (!arg || *arg == '\0')
883: fatal("%.200s line %d: Missing argument.", filename, linenum);
884: value = a2tun(arg, &value2);
1.145 reyk 885: if (value == SSH_TUNID_ERR)
1.144 reyk 886: fatal("%.200s line %d: Bad tun device.", filename, linenum);
887: if (*activep) {
888: options->tun_local = value;
889: options->tun_remote = value2;
890: }
891: break;
892:
893: case oLocalCommand:
894: charptr = &options->local_command;
895: goto parse_command;
896:
897: case oPermitLocalCommand:
898: intptr = &options->permit_local_command;
899: goto parse_flag;
900:
1.96 markus 901: case oDeprecated:
1.98 markus 902: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 903: filename, linenum, keyword);
1.98 markus 904: return 0;
1.96 markus 905:
1.110 jakob 906: case oUnsupported:
907: error("%s line %d: Unsupported option \"%s\"",
908: filename, linenum, keyword);
909: return 0;
910:
1.17 markus 911: default:
912: fatal("process_config_line: Unimplemented opcode %d", opcode);
913: }
914:
915: /* Check that there is no garbage at end of line. */
1.57 djm 916: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 917: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 918: filename, linenum, arg);
1.39 ho 919: }
1.17 markus 920: return 0;
1.1 deraadt 921: }
922:
923:
1.19 markus 924: /*
925: * Reads the config file and modifies the options accordingly. Options
926: * should already be initialized before this call. This never returns if
1.89 stevesk 927: * there is an error. If the file does not exist, this returns 0.
1.19 markus 928: */
1.1 deraadt 929:
1.89 stevesk 930: int
1.134 deraadt 931: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 932: int checkperm)
1.1 deraadt 933: {
1.17 markus 934: FILE *f;
935: char line[1024];
936: int active, linenum;
937: int bad_options = 0;
938:
939: /* Open the file. */
1.129 djm 940: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 941: return 0;
1.129 djm 942:
943: if (checkperm) {
944: struct stat sb;
1.134 deraadt 945:
1.131 dtucker 946: if (fstat(fileno(f), &sb) == -1)
1.129 djm 947: fatal("fstat %s: %s", filename, strerror(errno));
948: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 949: (sb.st_mode & 022) != 0))
1.129 djm 950: fatal("Bad owner or permissions on %s", filename);
951: }
1.17 markus 952:
953: debug("Reading configuration data %.200s", filename);
954:
1.19 markus 955: /*
956: * Mark that we are now processing the options. This flag is turned
957: * on/off by Host specifications.
958: */
1.17 markus 959: active = 1;
960: linenum = 0;
961: while (fgets(line, sizeof(line), f)) {
962: /* Update line number counter. */
963: linenum++;
964: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
965: bad_options++;
966: }
967: fclose(f);
968: if (bad_options > 0)
1.64 millert 969: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 970: filename, bad_options);
1.89 stevesk 971: return 1;
1.1 deraadt 972: }
973:
1.19 markus 974: /*
975: * Initializes options to special values that indicate that they have not yet
976: * been set. Read_config_file will only set options with this value. Options
977: * are processed in the following order: command line, user config file,
978: * system config file. Last, fill_default_options is called.
979: */
1.1 deraadt 980:
1.26 markus 981: void
1.17 markus 982: initialize_options(Options * options)
1.1 deraadt 983: {
1.17 markus 984: memset(options, 'X', sizeof(*options));
985: options->forward_agent = -1;
986: options->forward_x11 = -1;
1.123 markus 987: options->forward_x11_trusted = -1;
1.34 markus 988: options->xauth_location = NULL;
1.17 markus 989: options->gateway_ports = -1;
990: options->use_privileged_port = -1;
991: options->rsa_authentication = -1;
1.50 markus 992: options->pubkey_authentication = -1;
1.78 markus 993: options->challenge_response_authentication = -1;
1.118 markus 994: options->gss_authentication = -1;
995: options->gss_deleg_creds = -1;
1.17 markus 996: options->password_authentication = -1;
1.48 markus 997: options->kbd_interactive_authentication = -1;
998: options->kbd_interactive_devices = NULL;
1.17 markus 999: options->rhosts_rsa_authentication = -1;
1.72 markus 1000: options->hostbased_authentication = -1;
1.17 markus 1001: options->batch_mode = -1;
1002: options->check_host_ip = -1;
1003: options->strict_host_key_checking = -1;
1004: options->compression = -1;
1.126 markus 1005: options->tcp_keep_alive = -1;
1.17 markus 1006: options->compression_level = -1;
1007: options->port = -1;
1.114 djm 1008: options->address_family = -1;
1.17 markus 1009: options->connection_attempts = -1;
1.111 djm 1010: options->connection_timeout = -1;
1.17 markus 1011: options->number_of_password_prompts = -1;
1012: options->cipher = -1;
1.25 markus 1013: options->ciphers = NULL;
1.62 markus 1014: options->macs = NULL;
1.76 markus 1015: options->hostkeyalgorithms = NULL;
1.25 markus 1016: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1017: options->num_identity_files = 0;
1018: options->hostname = NULL;
1.52 markus 1019: options->host_key_alias = NULL;
1.17 markus 1020: options->proxy_command = NULL;
1021: options->user = NULL;
1022: options->escape_char = -1;
1023: options->system_hostfile = NULL;
1024: options->user_hostfile = NULL;
1.27 markus 1025: options->system_hostfile2 = NULL;
1026: options->user_hostfile2 = NULL;
1.17 markus 1027: options->num_local_forwards = 0;
1028: options->num_remote_forwards = 0;
1.90 stevesk 1029: options->clear_forwardings = -1;
1.95 markus 1030: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1031: options->preferred_authentications = NULL;
1.77 markus 1032: options->bind_address = NULL;
1.86 markus 1033: options->smartcard_device = NULL;
1.101 markus 1034: options->enable_ssh_keysign = - 1;
1.91 markus 1035: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1036: options->identities_only = - 1;
1.105 markus 1037: options->rekey_limit = - 1;
1.107 jakob 1038: options->verify_host_key_dns = -1;
1.127 markus 1039: options->server_alive_interval = -1;
1040: options->server_alive_count_max = -1;
1.130 djm 1041: options->num_send_env = 0;
1.132 djm 1042: options->control_path = NULL;
1043: options->control_master = -1;
1.136 djm 1044: options->hash_known_hosts = -1;
1.144 reyk 1045: options->tun_open = -1;
1046: options->tun_local = -1;
1047: options->tun_remote = -1;
1048: options->local_command = NULL;
1049: options->permit_local_command = -1;
1.1 deraadt 1050: }
1051:
1.19 markus 1052: /*
1053: * Called after processing other sources of option data, this fills those
1054: * options for which no value has been specified with their default values.
1055: */
1.1 deraadt 1056:
1.26 markus 1057: void
1.17 markus 1058: fill_default_options(Options * options)
1.1 deraadt 1059: {
1.61 deraadt 1060: int len;
1061:
1.17 markus 1062: if (options->forward_agent == -1)
1.33 markus 1063: options->forward_agent = 0;
1.17 markus 1064: if (options->forward_x11 == -1)
1.23 markus 1065: options->forward_x11 = 0;
1.123 markus 1066: if (options->forward_x11_trusted == -1)
1067: options->forward_x11_trusted = 0;
1.34 markus 1068: if (options->xauth_location == NULL)
1.80 markus 1069: options->xauth_location = _PATH_XAUTH;
1.17 markus 1070: if (options->gateway_ports == -1)
1071: options->gateway_ports = 0;
1072: if (options->use_privileged_port == -1)
1.65 markus 1073: options->use_privileged_port = 0;
1.17 markus 1074: if (options->rsa_authentication == -1)
1075: options->rsa_authentication = 1;
1.50 markus 1076: if (options->pubkey_authentication == -1)
1077: options->pubkey_authentication = 1;
1.78 markus 1078: if (options->challenge_response_authentication == -1)
1.83 markus 1079: options->challenge_response_authentication = 1;
1.118 markus 1080: if (options->gss_authentication == -1)
1.122 markus 1081: options->gss_authentication = 0;
1.118 markus 1082: if (options->gss_deleg_creds == -1)
1083: options->gss_deleg_creds = 0;
1.17 markus 1084: if (options->password_authentication == -1)
1085: options->password_authentication = 1;
1.48 markus 1086: if (options->kbd_interactive_authentication == -1)
1.59 markus 1087: options->kbd_interactive_authentication = 1;
1.17 markus 1088: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1089: options->rhosts_rsa_authentication = 0;
1.72 markus 1090: if (options->hostbased_authentication == -1)
1091: options->hostbased_authentication = 0;
1.17 markus 1092: if (options->batch_mode == -1)
1093: options->batch_mode = 0;
1094: if (options->check_host_ip == -1)
1095: options->check_host_ip = 1;
1096: if (options->strict_host_key_checking == -1)
1097: options->strict_host_key_checking = 2; /* 2 is default */
1098: if (options->compression == -1)
1099: options->compression = 0;
1.126 markus 1100: if (options->tcp_keep_alive == -1)
1101: options->tcp_keep_alive = 1;
1.17 markus 1102: if (options->compression_level == -1)
1103: options->compression_level = 6;
1104: if (options->port == -1)
1105: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1106: if (options->address_family == -1)
1107: options->address_family = AF_UNSPEC;
1.17 markus 1108: if (options->connection_attempts == -1)
1.84 markus 1109: options->connection_attempts = 1;
1.17 markus 1110: if (options->number_of_password_prompts == -1)
1111: options->number_of_password_prompts = 3;
1112: /* Selected in ssh_login(). */
1113: if (options->cipher == -1)
1114: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1115: /* options->ciphers, default set in myproposals.h */
1.62 markus 1116: /* options->macs, default set in myproposals.h */
1.76 markus 1117: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1118: if (options->protocol == SSH_PROTO_UNKNOWN)
1.69 markus 1119: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
1.17 markus 1120: if (options->num_identity_files == 0) {
1.50 markus 1121: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1122: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1123: options->identity_files[options->num_identity_files] =
1.61 deraadt 1124: xmalloc(len);
1125: snprintf(options->identity_files[options->num_identity_files++],
1126: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1127: }
1128: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1129: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1130: options->identity_files[options->num_identity_files] =
1131: xmalloc(len);
1132: snprintf(options->identity_files[options->num_identity_files++],
1133: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1134:
1.61 deraadt 1135: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1136: options->identity_files[options->num_identity_files] =
1.61 deraadt 1137: xmalloc(len);
1138: snprintf(options->identity_files[options->num_identity_files++],
1139: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.50 markus 1140: }
1.27 markus 1141: }
1.17 markus 1142: if (options->escape_char == -1)
1143: options->escape_char = '~';
1144: if (options->system_hostfile == NULL)
1.55 markus 1145: options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
1.17 markus 1146: if (options->user_hostfile == NULL)
1.55 markus 1147: options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
1.27 markus 1148: if (options->system_hostfile2 == NULL)
1.55 markus 1149: options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
1.27 markus 1150: if (options->user_hostfile2 == NULL)
1.55 markus 1151: options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
1.95 markus 1152: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1153: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1154: if (options->clear_forwardings == 1)
1155: clear_forwardings(options);
1.91 markus 1156: if (options->no_host_authentication_for_localhost == - 1)
1157: options->no_host_authentication_for_localhost = 0;
1.128 markus 1158: if (options->identities_only == -1)
1159: options->identities_only = 0;
1.101 markus 1160: if (options->enable_ssh_keysign == -1)
1161: options->enable_ssh_keysign = 0;
1.105 markus 1162: if (options->rekey_limit == -1)
1163: options->rekey_limit = 0;
1.107 jakob 1164: if (options->verify_host_key_dns == -1)
1165: options->verify_host_key_dns = 0;
1.127 markus 1166: if (options->server_alive_interval == -1)
1167: options->server_alive_interval = 0;
1168: if (options->server_alive_count_max == -1)
1169: options->server_alive_count_max = 3;
1.132 djm 1170: if (options->control_master == -1)
1171: options->control_master = 0;
1.136 djm 1172: if (options->hash_known_hosts == -1)
1173: options->hash_known_hosts = 0;
1.144 reyk 1174: if (options->tun_open == -1)
1.145 reyk 1175: options->tun_open = SSH_TUNMODE_NO;
1176: if (options->tun_local == -1)
1177: options->tun_local = SSH_TUNID_ANY;
1178: if (options->tun_remote == -1)
1179: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1180: if (options->permit_local_command == -1)
1181: options->permit_local_command = 0;
1182: /* options->local_command should not be set by default */
1.17 markus 1183: /* options->proxy_command should not be set by default */
1184: /* options->user will be set in the main program if appropriate */
1185: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1186: /* options->host_key_alias should not be set by default */
1.67 markus 1187: /* options->preferred_authentications will be set in ssh */
1.135 djm 1188: }
1189:
1190: /*
1191: * parse_forward
1192: * parses a string containing a port forwarding specification of the form:
1193: * [listenhost:]listenport:connecthost:connectport
1194: * returns number of arguments parsed or zero on error
1195: */
1196: int
1197: parse_forward(Forward *fwd, const char *fwdspec)
1198: {
1199: int i;
1200: char *p, *cp, *fwdarg[4];
1201:
1202: memset(fwd, '\0', sizeof(*fwd));
1203:
1204: cp = p = xstrdup(fwdspec);
1205:
1206: /* skip leading spaces */
1207: while (*cp && isspace(*cp))
1208: cp++;
1209:
1210: for (i = 0; i < 4; ++i)
1211: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1212: break;
1213:
1214: /* Check for trailing garbage in 4-arg case*/
1215: if (cp != NULL)
1216: i = 0; /* failure */
1217:
1218: switch (i) {
1219: case 3:
1220: fwd->listen_host = NULL;
1221: fwd->listen_port = a2port(fwdarg[0]);
1222: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1223: fwd->connect_port = a2port(fwdarg[2]);
1224: break;
1225:
1226: case 4:
1227: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1228: fwd->listen_port = a2port(fwdarg[1]);
1229: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1230: fwd->connect_port = a2port(fwdarg[3]);
1231: break;
1232: default:
1233: i = 0; /* failure */
1234: }
1235:
1236: xfree(p);
1237:
1238: if (fwd->listen_port == 0 && fwd->connect_port == 0)
1239: goto fail_free;
1240:
1241: if (fwd->connect_host != NULL &&
1242: strlen(fwd->connect_host) >= NI_MAXHOST)
1243: goto fail_free;
1244:
1245: return (i);
1246:
1247: fail_free:
1248: if (fwd->connect_host != NULL)
1249: xfree(fwd->connect_host);
1250: if (fwd->listen_host != NULL)
1251: xfree(fwd->listen_host);
1252: return (0);
1.1 deraadt 1253: }
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