Annotation of src/usr.bin/ssh/readconf.c, Revision 1.147
1.1 deraadt 1: /*
1.18 deraadt 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
5: * Functions for reading the configuration files.
1.26 markus 6: *
1.46 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 12: */
1.1 deraadt 13:
14: #include "includes.h"
1.147 ! stevesk 15: RCSID("$OpenBSD: readconf.c,v 1.146 2006/02/12 10:44:18 djm Exp $");
! 16:
! 17: #include <sys/types.h>
! 18: #include <sys/stat.h>
1.1 deraadt 19:
20: #include "ssh.h"
21: #include "xmalloc.h"
1.25 markus 22: #include "compat.h"
1.58 markus 23: #include "cipher.h"
1.55 markus 24: #include "pathnames.h"
1.58 markus 25: #include "log.h"
26: #include "readconf.h"
27: #include "match.h"
28: #include "misc.h"
1.62 markus 29: #include "kex.h"
30: #include "mac.h"
1.1 deraadt 31:
32: /* Format of the configuration file:
33:
34: # Configuration data is parsed as follows:
35: # 1. command line options
36: # 2. user-specific file
37: # 3. system-wide file
38: # Any configuration value is only changed the first time it is set.
39: # Thus, host-specific definitions should be at the beginning of the
40: # configuration file, and defaults at the end.
41:
42: # Host-specific declarations. These may override anything above. A single
43: # host may match multiple declarations; these are processed in the order
44: # that they are given in.
45:
46: Host *.ngs.fi ngs.fi
1.96 markus 47: User foo
1.1 deraadt 48:
49: Host fake.com
50: HostName another.host.name.real.org
51: User blaah
52: Port 34289
53: ForwardX11 no
54: ForwardAgent no
55:
56: Host books.com
57: RemoteForward 9999 shadows.cs.hut.fi:9999
58: Cipher 3des
59:
60: Host fascist.blob.com
61: Port 23123
62: User tylonen
63: PasswordAuthentication no
64:
65: Host puukko.hut.fi
66: User t35124p
67: ProxyCommand ssh-proxy %h %p
68:
69: Host *.fr
1.96 markus 70: PublicKeyAuthentication no
1.1 deraadt 71:
72: Host *.su
73: Cipher none
74: PasswordAuthentication no
75:
1.144 reyk 76: Host vpn.fake.com
77: Tunnel yes
78: TunnelDevice 3
79:
1.1 deraadt 80: # Defaults for various options
81: Host *
82: ForwardAgent no
1.50 markus 83: ForwardX11 no
1.1 deraadt 84: PasswordAuthentication yes
85: RSAAuthentication yes
86: RhostsRSAAuthentication yes
87: StrictHostKeyChecking yes
1.126 markus 88: TcpKeepAlive no
1.1 deraadt 89: IdentityFile ~/.ssh/identity
90: Port 22
91: EscapeChar ~
92:
93: */
94:
95: /* Keyword tokens. */
96:
1.17 markus 97: typedef enum {
98: oBadOption,
1.123 markus 99: oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts,
1.100 deraadt 100: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 101: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 102: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
103: oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
104: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
105: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 106: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 107: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 108: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 109: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 110: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.90 stevesk 111: oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
1.96 markus 112: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 113: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 114: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 115: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.136 djm 116: oSendEnv, oControlPath, oControlMaster, oHashKnownHosts,
1.144 reyk 117: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.110 jakob 118: oDeprecated, oUnsupported
1.1 deraadt 119: } OpCodes;
120:
121: /* Textual representations of the tokens. */
122:
1.17 markus 123: static struct {
124: const char *name;
125: OpCodes opcode;
126: } keywords[] = {
127: { "forwardagent", oForwardAgent },
128: { "forwardx11", oForwardX11 },
1.123 markus 129: { "forwardx11trusted", oForwardX11Trusted },
1.34 markus 130: { "xauthlocation", oXAuthLocation },
1.17 markus 131: { "gatewayports", oGatewayPorts },
132: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 133: { "rhostsauthentication", oDeprecated },
1.17 markus 134: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 135: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
136: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 137: { "rsaauthentication", oRSAAuthentication },
1.50 markus 138: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 139: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 140: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 141: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 142: { "challengeresponseauthentication", oChallengeResponseAuthentication },
143: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
144: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 145: { "kerberosauthentication", oUnsupported },
146: { "kerberostgtpassing", oUnsupported },
147: { "afstokenpassing", oUnsupported },
1.118 markus 148: #if defined(GSSAPI)
149: { "gssapiauthentication", oGssAuthentication },
150: { "gssapidelegatecredentials", oGssDelegateCreds },
151: #else
152: { "gssapiauthentication", oUnsupported },
153: { "gssapidelegatecredentials", oUnsupported },
154: #endif
1.96 markus 155: { "fallbacktorsh", oDeprecated },
156: { "usersh", oDeprecated },
1.17 markus 157: { "identityfile", oIdentityFile },
1.50 markus 158: { "identityfile2", oIdentityFile }, /* alias */
1.128 markus 159: { "identitiesonly", oIdentitiesOnly },
1.17 markus 160: { "hostname", oHostName },
1.52 markus 161: { "hostkeyalias", oHostKeyAlias },
1.17 markus 162: { "proxycommand", oProxyCommand },
163: { "port", oPort },
164: { "cipher", oCipher },
1.25 markus 165: { "ciphers", oCiphers },
1.62 markus 166: { "macs", oMacs },
1.25 markus 167: { "protocol", oProtocol },
1.17 markus 168: { "remoteforward", oRemoteForward },
169: { "localforward", oLocalForward },
170: { "user", oUser },
171: { "host", oHost },
172: { "escapechar", oEscapeChar },
173: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.81 markus 174: { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */
1.27 markus 175: { "globalknownhostsfile2", oGlobalKnownHostsFile2 },
1.81 markus 176: { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
1.17 markus 177: { "connectionattempts", oConnectionAttempts },
178: { "batchmode", oBatchMode },
179: { "checkhostip", oCheckHostIP },
180: { "stricthostkeychecking", oStrictHostKeyChecking },
181: { "compression", oCompression },
182: { "compressionlevel", oCompressionLevel },
1.126 markus 183: { "tcpkeepalive", oTCPKeepAlive },
184: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 185: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
186: { "loglevel", oLogLevel },
1.71 markus 187: { "dynamicforward", oDynamicForward },
1.67 markus 188: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 189: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 190: { "bindaddress", oBindAddress },
1.110 jakob 191: #ifdef SMARTCARD
1.85 jakob 192: { "smartcarddevice", oSmartcardDevice },
1.110 jakob 193: #else
194: { "smartcarddevice", oUnsupported },
195: #endif
1.93 deraadt 196: { "clearallforwardings", oClearAllForwardings },
1.101 markus 197: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 198: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 199: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 200: { "rekeylimit", oRekeyLimit },
1.111 djm 201: { "connecttimeout", oConnectTimeout },
1.112 djm 202: { "addressfamily", oAddressFamily },
1.127 markus 203: { "serveraliveinterval", oServerAliveInterval },
204: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 205: { "sendenv", oSendEnv },
1.132 djm 206: { "controlpath", oControlPath },
207: { "controlmaster", oControlMaster },
1.136 djm 208: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 209: { "tunnel", oTunnel },
210: { "tunneldevice", oTunnelDevice },
211: { "localcommand", oLocalCommand },
212: { "permitlocalcommand", oPermitLocalCommand },
1.92 stevesk 213: { NULL, oBadOption }
1.13 markus 214: };
215:
1.19 markus 216: /*
217: * Adds a local TCP/IP port forward to options. Never returns if there is an
218: * error.
219: */
1.1 deraadt 220:
1.26 markus 221: void
1.135 djm 222: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 223: {
1.17 markus 224: Forward *fwd;
225: extern uid_t original_real_uid;
1.135 djm 226: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 227: fatal("Privileged ports can only be forwarded by root.");
1.17 markus 228: if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
229: fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
230: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 231:
232: fwd->listen_host = (newfwd->listen_host == NULL) ?
233: NULL : xstrdup(newfwd->listen_host);
234: fwd->listen_port = newfwd->listen_port;
235: fwd->connect_host = xstrdup(newfwd->connect_host);
236: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 237: }
238:
1.19 markus 239: /*
240: * Adds a remote TCP/IP port forward to options. Never returns if there is
241: * an error.
242: */
1.1 deraadt 243:
1.26 markus 244: void
1.135 djm 245: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 246: {
1.17 markus 247: Forward *fwd;
248: if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
249: fatal("Too many remote forwards (max %d).",
1.93 deraadt 250: SSH_MAX_FORWARDS_PER_DIRECTION);
1.17 markus 251: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 252:
253: fwd->listen_host = (newfwd->listen_host == NULL) ?
254: NULL : xstrdup(newfwd->listen_host);
255: fwd->listen_port = newfwd->listen_port;
256: fwd->connect_host = xstrdup(newfwd->connect_host);
257: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 258: }
259:
1.90 stevesk 260: static void
261: clear_forwardings(Options *options)
262: {
263: int i;
264:
1.135 djm 265: for (i = 0; i < options->num_local_forwards; i++) {
1.138 dtucker 266: if (options->local_forwards[i].listen_host != NULL)
267: xfree(options->local_forwards[i].listen_host);
1.135 djm 268: xfree(options->local_forwards[i].connect_host);
269: }
1.90 stevesk 270: options->num_local_forwards = 0;
1.135 djm 271: for (i = 0; i < options->num_remote_forwards; i++) {
1.138 dtucker 272: if (options->remote_forwards[i].listen_host != NULL)
273: xfree(options->remote_forwards[i].listen_host);
1.135 djm 274: xfree(options->remote_forwards[i].connect_host);
275: }
1.90 stevesk 276: options->num_remote_forwards = 0;
1.145 reyk 277: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 278: }
279:
1.19 markus 280: /*
1.70 stevesk 281: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 282: */
1.1 deraadt 283:
1.26 markus 284: static OpCodes
1.17 markus 285: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 286: {
1.51 markus 287: u_int i;
1.1 deraadt 288:
1.17 markus 289: for (i = 0; keywords[i].name; i++)
1.20 markus 290: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 291: return keywords[i].opcode;
292:
1.75 stevesk 293: error("%s: line %d: Bad configuration option: %s",
294: filename, linenum, cp);
1.17 markus 295: return oBadOption;
1.1 deraadt 296: }
297:
1.19 markus 298: /*
299: * Processes a single option line as used in the configuration files. This
300: * only sets those values that have not already been set.
301: */
1.102 markus 302: #define WHITESPACE " \t\r\n"
1.1 deraadt 303:
1.14 markus 304: int
305: process_config_line(Options *options, const char *host,
1.17 markus 306: char *line, const char *filename, int linenum,
307: int *activep)
1.1 deraadt 308: {
1.135 djm 309: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
1.146 djm 310: int opcode, *intptr, value, value2, scale;
311: long long orig, val64;
1.102 markus 312: size_t len;
1.135 djm 313: Forward fwd;
1.106 djm 314:
315: /* Strip trailing whitespace */
1.139 deraadt 316: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 317: if (strchr(WHITESPACE, line[len]) == NULL)
318: break;
319: line[len] = '\0';
320: }
1.1 deraadt 321:
1.42 provos 322: s = line;
323: /* Get the keyword. (Each line is supposed to begin with a keyword). */
324: keyword = strdelim(&s);
325: /* Ignore leading whitespace. */
326: if (*keyword == '\0')
1.43 markus 327: keyword = strdelim(&s);
1.56 deraadt 328: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 329: return 0;
330:
1.38 provos 331: opcode = parse_token(keyword, filename, linenum);
1.17 markus 332:
333: switch (opcode) {
334: case oBadOption:
1.19 markus 335: /* don't panic, but count bad options */
336: return -1;
1.17 markus 337: /* NOTREACHED */
1.111 djm 338: case oConnectTimeout:
339: intptr = &options->connection_timeout;
1.127 markus 340: parse_time:
1.111 djm 341: arg = strdelim(&s);
342: if (!arg || *arg == '\0')
343: fatal("%s line %d: missing time value.",
344: filename, linenum);
345: if ((value = convtime(arg)) == -1)
346: fatal("%s line %d: invalid time value.",
347: filename, linenum);
348: if (*intptr == -1)
349: *intptr = value;
350: break;
351:
1.17 markus 352: case oForwardAgent:
353: intptr = &options->forward_agent;
354: parse_flag:
1.42 provos 355: arg = strdelim(&s);
1.40 ho 356: if (!arg || *arg == '\0')
1.17 markus 357: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
358: value = 0; /* To avoid compiler warning... */
1.38 provos 359: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 360: value = 1;
1.38 provos 361: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 362: value = 0;
363: else
364: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
365: if (*activep && *intptr == -1)
366: *intptr = value;
367: break;
368:
369: case oForwardX11:
370: intptr = &options->forward_x11;
371: goto parse_flag;
372:
1.123 markus 373: case oForwardX11Trusted:
374: intptr = &options->forward_x11_trusted;
375: goto parse_flag;
376:
1.17 markus 377: case oGatewayPorts:
378: intptr = &options->gateway_ports;
379: goto parse_flag;
380:
381: case oUsePrivilegedPort:
382: intptr = &options->use_privileged_port;
383: goto parse_flag;
384:
385: case oPasswordAuthentication:
386: intptr = &options->password_authentication;
387: goto parse_flag;
388:
1.48 markus 389: case oKbdInteractiveAuthentication:
390: intptr = &options->kbd_interactive_authentication;
391: goto parse_flag;
392:
393: case oKbdInteractiveDevices:
394: charptr = &options->kbd_interactive_devices;
395: goto parse_string;
396:
1.50 markus 397: case oPubkeyAuthentication:
398: intptr = &options->pubkey_authentication;
1.30 markus 399: goto parse_flag;
400:
1.17 markus 401: case oRSAAuthentication:
402: intptr = &options->rsa_authentication;
403: goto parse_flag;
404:
405: case oRhostsRSAAuthentication:
406: intptr = &options->rhosts_rsa_authentication;
407: goto parse_flag;
408:
1.72 markus 409: case oHostbasedAuthentication:
410: intptr = &options->hostbased_authentication;
411: goto parse_flag;
412:
1.59 markus 413: case oChallengeResponseAuthentication:
1.78 markus 414: intptr = &options->challenge_response_authentication;
1.17 markus 415: goto parse_flag;
1.108 jakob 416:
1.118 markus 417: case oGssAuthentication:
418: intptr = &options->gss_authentication;
419: goto parse_flag;
420:
421: case oGssDelegateCreds:
422: intptr = &options->gss_deleg_creds;
423: goto parse_flag;
424:
1.17 markus 425: case oBatchMode:
426: intptr = &options->batch_mode;
427: goto parse_flag;
428:
429: case oCheckHostIP:
430: intptr = &options->check_host_ip;
431: goto parse_flag;
432:
1.107 jakob 433: case oVerifyHostKeyDNS:
434: intptr = &options->verify_host_key_dns;
1.125 jakob 435: goto parse_yesnoask;
1.107 jakob 436:
1.17 markus 437: case oStrictHostKeyChecking:
438: intptr = &options->strict_host_key_checking;
1.125 jakob 439: parse_yesnoask:
1.42 provos 440: arg = strdelim(&s);
1.40 ho 441: if (!arg || *arg == '\0')
1.60 stevesk 442: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 443: filename, linenum);
1.17 markus 444: value = 0; /* To avoid compiler warning... */
1.38 provos 445: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 446: value = 1;
1.38 provos 447: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 448: value = 0;
1.38 provos 449: else if (strcmp(arg, "ask") == 0)
1.17 markus 450: value = 2;
451: else
452: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
453: if (*activep && *intptr == -1)
454: *intptr = value;
455: break;
456:
457: case oCompression:
458: intptr = &options->compression;
459: goto parse_flag;
460:
1.126 markus 461: case oTCPKeepAlive:
462: intptr = &options->tcp_keep_alive;
1.17 markus 463: goto parse_flag;
464:
1.91 markus 465: case oNoHostAuthenticationForLocalhost:
466: intptr = &options->no_host_authentication_for_localhost;
467: goto parse_flag;
468:
1.17 markus 469: case oNumberOfPasswordPrompts:
470: intptr = &options->number_of_password_prompts;
471: goto parse_int;
472:
473: case oCompressionLevel:
474: intptr = &options->compression_level;
475: goto parse_int;
476:
1.105 markus 477: case oRekeyLimit:
478: intptr = &options->rekey_limit;
479: arg = strdelim(&s);
480: if (!arg || *arg == '\0')
481: fatal("%.200s line %d: Missing argument.", filename, linenum);
482: if (arg[0] < '0' || arg[0] > '9')
483: fatal("%.200s line %d: Bad number.", filename, linenum);
1.146 djm 484: orig = val64 = strtoll(arg, &endofnumber, 10);
1.105 markus 485: if (arg == endofnumber)
486: fatal("%.200s line %d: Bad number.", filename, linenum);
487: switch (toupper(*endofnumber)) {
1.146 djm 488: case '\0':
489: scale = 1;
490: break;
1.105 markus 491: case 'K':
1.146 djm 492: scale = 1<<10;
1.105 markus 493: break;
494: case 'M':
1.146 djm 495: scale = 1<<20;
1.105 markus 496: break;
497: case 'G':
1.146 djm 498: scale = 1<<30;
1.105 markus 499: break;
1.146 djm 500: default:
501: fatal("%.200s line %d: Invalid RekeyLimit suffix",
502: filename, linenum);
1.105 markus 503: }
1.146 djm 504: val64 *= scale;
505: /* detect integer wrap and too-large limits */
506: if ((val64 / scale) != orig || val64 > INT_MAX)
507: fatal("%.200s line %d: RekeyLimit too large",
508: filename, linenum);
509: if (val64 < 16)
510: fatal("%.200s line %d: RekeyLimit too small",
511: filename, linenum);
1.105 markus 512: if (*activep && *intptr == -1)
1.146 djm 513: *intptr = (int)val64;
1.105 markus 514: break;
515:
1.17 markus 516: case oIdentityFile:
1.42 provos 517: arg = strdelim(&s);
1.40 ho 518: if (!arg || *arg == '\0')
1.17 markus 519: fatal("%.200s line %d: Missing argument.", filename, linenum);
520: if (*activep) {
1.50 markus 521: intptr = &options->num_identity_files;
1.27 markus 522: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 523: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 524: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.50 markus 525: charptr = &options->identity_files[*intptr];
1.38 provos 526: *charptr = xstrdup(arg);
1.27 markus 527: *intptr = *intptr + 1;
1.17 markus 528: }
529: break;
530:
1.34 markus 531: case oXAuthLocation:
532: charptr=&options->xauth_location;
533: goto parse_string;
534:
1.17 markus 535: case oUser:
536: charptr = &options->user;
537: parse_string:
1.42 provos 538: arg = strdelim(&s);
1.40 ho 539: if (!arg || *arg == '\0')
1.17 markus 540: fatal("%.200s line %d: Missing argument.", filename, linenum);
541: if (*activep && *charptr == NULL)
1.38 provos 542: *charptr = xstrdup(arg);
1.17 markus 543: break;
544:
545: case oGlobalKnownHostsFile:
546: charptr = &options->system_hostfile;
547: goto parse_string;
548:
549: case oUserKnownHostsFile:
550: charptr = &options->user_hostfile;
551: goto parse_string;
552:
1.27 markus 553: case oGlobalKnownHostsFile2:
554: charptr = &options->system_hostfile2;
555: goto parse_string;
556:
557: case oUserKnownHostsFile2:
558: charptr = &options->user_hostfile2;
559: goto parse_string;
560:
1.17 markus 561: case oHostName:
562: charptr = &options->hostname;
563: goto parse_string;
564:
1.52 markus 565: case oHostKeyAlias:
566: charptr = &options->host_key_alias;
567: goto parse_string;
568:
1.67 markus 569: case oPreferredAuthentications:
570: charptr = &options->preferred_authentications;
571: goto parse_string;
572:
1.77 markus 573: case oBindAddress:
574: charptr = &options->bind_address;
575: goto parse_string;
576:
1.85 jakob 577: case oSmartcardDevice:
1.86 markus 578: charptr = &options->smartcard_device;
579: goto parse_string;
1.85 jakob 580:
1.17 markus 581: case oProxyCommand:
1.144 reyk 582: charptr = &options->proxy_command;
583: parse_command:
1.113 markus 584: if (s == NULL)
585: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 586: len = strspn(s, WHITESPACE "=");
1.17 markus 587: if (*activep && *charptr == NULL)
1.102 markus 588: *charptr = xstrdup(s + len);
1.17 markus 589: return 0;
590:
591: case oPort:
592: intptr = &options->port;
593: parse_int:
1.42 provos 594: arg = strdelim(&s);
1.40 ho 595: if (!arg || *arg == '\0')
1.17 markus 596: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 597: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 598: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 599:
600: /* Octal, decimal, or hex format? */
1.38 provos 601: value = strtol(arg, &endofnumber, 0);
602: if (arg == endofnumber)
1.21 markus 603: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 604: if (*activep && *intptr == -1)
605: *intptr = value;
606: break;
607:
608: case oConnectionAttempts:
609: intptr = &options->connection_attempts;
610: goto parse_int;
611:
612: case oCipher:
613: intptr = &options->cipher;
1.42 provos 614: arg = strdelim(&s);
1.40 ho 615: if (!arg || *arg == '\0')
1.32 markus 616: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 617: value = cipher_number(arg);
1.17 markus 618: if (value == -1)
619: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 620: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 621: if (*activep && *intptr == -1)
622: *intptr = value;
623: break;
624:
1.25 markus 625: case oCiphers:
1.42 provos 626: arg = strdelim(&s);
1.40 ho 627: if (!arg || *arg == '\0')
1.32 markus 628: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 629: if (!ciphers_valid(arg))
1.31 markus 630: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 631: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 632: if (*activep && options->ciphers == NULL)
1.38 provos 633: options->ciphers = xstrdup(arg);
1.25 markus 634: break;
635:
1.62 markus 636: case oMacs:
637: arg = strdelim(&s);
638: if (!arg || *arg == '\0')
639: fatal("%.200s line %d: Missing argument.", filename, linenum);
640: if (!mac_valid(arg))
641: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 642: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 643: if (*activep && options->macs == NULL)
644: options->macs = xstrdup(arg);
645: break;
646:
1.76 markus 647: case oHostKeyAlgorithms:
648: arg = strdelim(&s);
649: if (!arg || *arg == '\0')
650: fatal("%.200s line %d: Missing argument.", filename, linenum);
651: if (!key_names_valid2(arg))
652: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 653: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 654: if (*activep && options->hostkeyalgorithms == NULL)
655: options->hostkeyalgorithms = xstrdup(arg);
656: break;
657:
1.25 markus 658: case oProtocol:
659: intptr = &options->protocol;
1.42 provos 660: arg = strdelim(&s);
1.40 ho 661: if (!arg || *arg == '\0')
1.32 markus 662: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 663: value = proto_spec(arg);
1.25 markus 664: if (value == SSH_PROTO_UNKNOWN)
665: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 666: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 667: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
668: *intptr = value;
669: break;
670:
1.17 markus 671: case oLogLevel:
672: intptr = (int *) &options->log_level;
1.42 provos 673: arg = strdelim(&s);
1.38 provos 674: value = log_level_number(arg);
1.95 markus 675: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 676: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 677: filename, linenum, arg ? arg : "<NONE>");
1.95 markus 678: if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET)
1.17 markus 679: *intptr = (LogLevel) value;
680: break;
681:
1.88 stevesk 682: case oLocalForward:
1.17 markus 683: case oRemoteForward:
1.42 provos 684: arg = strdelim(&s);
1.135 djm 685: if (arg == NULL || *arg == '\0')
1.88 stevesk 686: fatal("%.200s line %d: Missing port argument.",
687: filename, linenum);
1.135 djm 688: arg2 = strdelim(&s);
689: if (arg2 == NULL || *arg2 == '\0')
690: fatal("%.200s line %d: Missing target argument.",
1.88 stevesk 691: filename, linenum);
1.135 djm 692:
693: /* construct a string for parse_forward */
694: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
695:
696: if (parse_forward(&fwd, fwdarg) == 0)
1.88 stevesk 697: fatal("%.200s line %d: Bad forwarding specification.",
698: filename, linenum);
1.135 djm 699:
1.88 stevesk 700: if (*activep) {
701: if (opcode == oLocalForward)
1.135 djm 702: add_local_forward(options, &fwd);
1.88 stevesk 703: else if (opcode == oRemoteForward)
1.135 djm 704: add_remote_forward(options, &fwd);
1.88 stevesk 705: }
1.17 markus 706: break;
1.71 markus 707:
708: case oDynamicForward:
709: arg = strdelim(&s);
710: if (!arg || *arg == '\0')
711: fatal("%.200s line %d: Missing port argument.",
712: filename, linenum);
1.135 djm 713: memset(&fwd, '\0', sizeof(fwd));
714: fwd.connect_host = "socks";
715: fwd.listen_host = hpdelim(&arg);
716: if (fwd.listen_host == NULL ||
717: strlen(fwd.listen_host) >= NI_MAXHOST)
718: fatal("%.200s line %d: Bad forwarding specification.",
719: filename, linenum);
720: if (arg) {
721: fwd.listen_port = a2port(arg);
722: fwd.listen_host = cleanhostname(fwd.listen_host);
723: } else {
724: fwd.listen_port = a2port(fwd.listen_host);
1.143 djm 725: fwd.listen_host = NULL;
1.135 djm 726: }
727: if (fwd.listen_port == 0)
1.71 markus 728: fatal("%.200s line %d: Badly formatted port number.",
729: filename, linenum);
1.87 markus 730: if (*activep)
1.135 djm 731: add_local_forward(options, &fwd);
1.72 markus 732: break;
1.17 markus 733:
1.90 stevesk 734: case oClearAllForwardings:
735: intptr = &options->clear_forwardings;
736: goto parse_flag;
737:
1.17 markus 738: case oHost:
739: *activep = 0;
1.42 provos 740: while ((arg = strdelim(&s)) != NULL && *arg != '\0')
1.38 provos 741: if (match_pattern(host, arg)) {
742: debug("Applying options for %.100s", arg);
1.17 markus 743: *activep = 1;
744: break;
745: }
1.42 provos 746: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 747: return 0;
748:
749: case oEscapeChar:
750: intptr = &options->escape_char;
1.42 provos 751: arg = strdelim(&s);
1.40 ho 752: if (!arg || *arg == '\0')
1.17 markus 753: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 754: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 755: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
756: value = (u_char) arg[1] & 31;
1.38 provos 757: else if (strlen(arg) == 1)
1.51 markus 758: value = (u_char) arg[0];
1.38 provos 759: else if (strcmp(arg, "none") == 0)
1.79 stevesk 760: value = SSH_ESCAPECHAR_NONE;
1.17 markus 761: else {
762: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 763: filename, linenum);
1.17 markus 764: /* NOTREACHED */
765: value = 0; /* Avoid compiler warning. */
766: }
767: if (*activep && *intptr == -1)
768: *intptr = value;
1.112 djm 769: break;
770:
771: case oAddressFamily:
772: arg = strdelim(&s);
1.140 markus 773: if (!arg || *arg == '\0')
774: fatal("%s line %d: missing address family.",
775: filename, linenum);
1.114 djm 776: intptr = &options->address_family;
1.112 djm 777: if (strcasecmp(arg, "inet") == 0)
1.114 djm 778: value = AF_INET;
1.112 djm 779: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 780: value = AF_INET6;
1.112 djm 781: else if (strcasecmp(arg, "any") == 0)
1.114 djm 782: value = AF_UNSPEC;
1.112 djm 783: else
784: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 785: if (*activep && *intptr == -1)
786: *intptr = value;
1.17 markus 787: break;
788:
1.101 markus 789: case oEnableSSHKeysign:
790: intptr = &options->enable_ssh_keysign;
791: goto parse_flag;
792:
1.128 markus 793: case oIdentitiesOnly:
794: intptr = &options->identities_only;
795: goto parse_flag;
796:
1.127 markus 797: case oServerAliveInterval:
798: intptr = &options->server_alive_interval;
799: goto parse_time;
800:
801: case oServerAliveCountMax:
802: intptr = &options->server_alive_count_max;
803: goto parse_int;
804:
1.130 djm 805: case oSendEnv:
806: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
807: if (strchr(arg, '=') != NULL)
808: fatal("%s line %d: Invalid environment name.",
809: filename, linenum);
1.137 djm 810: if (!*activep)
811: continue;
1.130 djm 812: if (options->num_send_env >= MAX_SEND_ENV)
813: fatal("%s line %d: too many send env.",
814: filename, linenum);
815: options->send_env[options->num_send_env++] =
816: xstrdup(arg);
817: }
818: break;
819:
1.132 djm 820: case oControlPath:
821: charptr = &options->control_path;
822: goto parse_string;
823:
824: case oControlMaster:
825: intptr = &options->control_master;
1.141 djm 826: arg = strdelim(&s);
827: if (!arg || *arg == '\0')
828: fatal("%.200s line %d: Missing ControlMaster argument.",
829: filename, linenum);
830: value = 0; /* To avoid compiler warning... */
831: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
832: value = SSHCTL_MASTER_YES;
833: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
834: value = SSHCTL_MASTER_NO;
835: else if (strcmp(arg, "auto") == 0)
836: value = SSHCTL_MASTER_AUTO;
837: else if (strcmp(arg, "ask") == 0)
838: value = SSHCTL_MASTER_ASK;
839: else if (strcmp(arg, "autoask") == 0)
840: value = SSHCTL_MASTER_AUTO_ASK;
841: else
842: fatal("%.200s line %d: Bad ControlMaster argument.",
843: filename, linenum);
844: if (*activep && *intptr == -1)
845: *intptr = value;
846: break;
1.132 djm 847:
1.136 djm 848: case oHashKnownHosts:
849: intptr = &options->hash_known_hosts;
850: goto parse_flag;
851:
1.144 reyk 852: case oTunnel:
853: intptr = &options->tun_open;
1.145 reyk 854: arg = strdelim(&s);
855: if (!arg || *arg == '\0')
856: fatal("%s line %d: Missing yes/point-to-point/"
857: "ethernet/no argument.", filename, linenum);
858: value = 0; /* silence compiler */
859: if (strcasecmp(arg, "ethernet") == 0)
860: value = SSH_TUNMODE_ETHERNET;
861: else if (strcasecmp(arg, "point-to-point") == 0)
862: value = SSH_TUNMODE_POINTOPOINT;
863: else if (strcasecmp(arg, "yes") == 0)
864: value = SSH_TUNMODE_DEFAULT;
865: else if (strcasecmp(arg, "no") == 0)
866: value = SSH_TUNMODE_NO;
867: else
868: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
869: "no argument: %s", filename, linenum, arg);
870: if (*activep)
871: *intptr = value;
872: break;
1.144 reyk 873:
874: case oTunnelDevice:
875: arg = strdelim(&s);
876: if (!arg || *arg == '\0')
877: fatal("%.200s line %d: Missing argument.", filename, linenum);
878: value = a2tun(arg, &value2);
1.145 reyk 879: if (value == SSH_TUNID_ERR)
1.144 reyk 880: fatal("%.200s line %d: Bad tun device.", filename, linenum);
881: if (*activep) {
882: options->tun_local = value;
883: options->tun_remote = value2;
884: }
885: break;
886:
887: case oLocalCommand:
888: charptr = &options->local_command;
889: goto parse_command;
890:
891: case oPermitLocalCommand:
892: intptr = &options->permit_local_command;
893: goto parse_flag;
894:
1.96 markus 895: case oDeprecated:
1.98 markus 896: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 897: filename, linenum, keyword);
1.98 markus 898: return 0;
1.96 markus 899:
1.110 jakob 900: case oUnsupported:
901: error("%s line %d: Unsupported option \"%s\"",
902: filename, linenum, keyword);
903: return 0;
904:
1.17 markus 905: default:
906: fatal("process_config_line: Unimplemented opcode %d", opcode);
907: }
908:
909: /* Check that there is no garbage at end of line. */
1.57 djm 910: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 911: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 912: filename, linenum, arg);
1.39 ho 913: }
1.17 markus 914: return 0;
1.1 deraadt 915: }
916:
917:
1.19 markus 918: /*
919: * Reads the config file and modifies the options accordingly. Options
920: * should already be initialized before this call. This never returns if
1.89 stevesk 921: * there is an error. If the file does not exist, this returns 0.
1.19 markus 922: */
1.1 deraadt 923:
1.89 stevesk 924: int
1.134 deraadt 925: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 926: int checkperm)
1.1 deraadt 927: {
1.17 markus 928: FILE *f;
929: char line[1024];
930: int active, linenum;
931: int bad_options = 0;
932:
933: /* Open the file. */
1.129 djm 934: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 935: return 0;
1.129 djm 936:
937: if (checkperm) {
938: struct stat sb;
1.134 deraadt 939:
1.131 dtucker 940: if (fstat(fileno(f), &sb) == -1)
1.129 djm 941: fatal("fstat %s: %s", filename, strerror(errno));
942: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 943: (sb.st_mode & 022) != 0))
1.129 djm 944: fatal("Bad owner or permissions on %s", filename);
945: }
1.17 markus 946:
947: debug("Reading configuration data %.200s", filename);
948:
1.19 markus 949: /*
950: * Mark that we are now processing the options. This flag is turned
951: * on/off by Host specifications.
952: */
1.17 markus 953: active = 1;
954: linenum = 0;
955: while (fgets(line, sizeof(line), f)) {
956: /* Update line number counter. */
957: linenum++;
958: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
959: bad_options++;
960: }
961: fclose(f);
962: if (bad_options > 0)
1.64 millert 963: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 964: filename, bad_options);
1.89 stevesk 965: return 1;
1.1 deraadt 966: }
967:
1.19 markus 968: /*
969: * Initializes options to special values that indicate that they have not yet
970: * been set. Read_config_file will only set options with this value. Options
971: * are processed in the following order: command line, user config file,
972: * system config file. Last, fill_default_options is called.
973: */
1.1 deraadt 974:
1.26 markus 975: void
1.17 markus 976: initialize_options(Options * options)
1.1 deraadt 977: {
1.17 markus 978: memset(options, 'X', sizeof(*options));
979: options->forward_agent = -1;
980: options->forward_x11 = -1;
1.123 markus 981: options->forward_x11_trusted = -1;
1.34 markus 982: options->xauth_location = NULL;
1.17 markus 983: options->gateway_ports = -1;
984: options->use_privileged_port = -1;
985: options->rsa_authentication = -1;
1.50 markus 986: options->pubkey_authentication = -1;
1.78 markus 987: options->challenge_response_authentication = -1;
1.118 markus 988: options->gss_authentication = -1;
989: options->gss_deleg_creds = -1;
1.17 markus 990: options->password_authentication = -1;
1.48 markus 991: options->kbd_interactive_authentication = -1;
992: options->kbd_interactive_devices = NULL;
1.17 markus 993: options->rhosts_rsa_authentication = -1;
1.72 markus 994: options->hostbased_authentication = -1;
1.17 markus 995: options->batch_mode = -1;
996: options->check_host_ip = -1;
997: options->strict_host_key_checking = -1;
998: options->compression = -1;
1.126 markus 999: options->tcp_keep_alive = -1;
1.17 markus 1000: options->compression_level = -1;
1001: options->port = -1;
1.114 djm 1002: options->address_family = -1;
1.17 markus 1003: options->connection_attempts = -1;
1.111 djm 1004: options->connection_timeout = -1;
1.17 markus 1005: options->number_of_password_prompts = -1;
1006: options->cipher = -1;
1.25 markus 1007: options->ciphers = NULL;
1.62 markus 1008: options->macs = NULL;
1.76 markus 1009: options->hostkeyalgorithms = NULL;
1.25 markus 1010: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1011: options->num_identity_files = 0;
1012: options->hostname = NULL;
1.52 markus 1013: options->host_key_alias = NULL;
1.17 markus 1014: options->proxy_command = NULL;
1015: options->user = NULL;
1016: options->escape_char = -1;
1017: options->system_hostfile = NULL;
1018: options->user_hostfile = NULL;
1.27 markus 1019: options->system_hostfile2 = NULL;
1020: options->user_hostfile2 = NULL;
1.17 markus 1021: options->num_local_forwards = 0;
1022: options->num_remote_forwards = 0;
1.90 stevesk 1023: options->clear_forwardings = -1;
1.95 markus 1024: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1025: options->preferred_authentications = NULL;
1.77 markus 1026: options->bind_address = NULL;
1.86 markus 1027: options->smartcard_device = NULL;
1.101 markus 1028: options->enable_ssh_keysign = - 1;
1.91 markus 1029: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1030: options->identities_only = - 1;
1.105 markus 1031: options->rekey_limit = - 1;
1.107 jakob 1032: options->verify_host_key_dns = -1;
1.127 markus 1033: options->server_alive_interval = -1;
1034: options->server_alive_count_max = -1;
1.130 djm 1035: options->num_send_env = 0;
1.132 djm 1036: options->control_path = NULL;
1037: options->control_master = -1;
1.136 djm 1038: options->hash_known_hosts = -1;
1.144 reyk 1039: options->tun_open = -1;
1040: options->tun_local = -1;
1041: options->tun_remote = -1;
1042: options->local_command = NULL;
1043: options->permit_local_command = -1;
1.1 deraadt 1044: }
1045:
1.19 markus 1046: /*
1047: * Called after processing other sources of option data, this fills those
1048: * options for which no value has been specified with their default values.
1049: */
1.1 deraadt 1050:
1.26 markus 1051: void
1.17 markus 1052: fill_default_options(Options * options)
1.1 deraadt 1053: {
1.61 deraadt 1054: int len;
1055:
1.17 markus 1056: if (options->forward_agent == -1)
1.33 markus 1057: options->forward_agent = 0;
1.17 markus 1058: if (options->forward_x11 == -1)
1.23 markus 1059: options->forward_x11 = 0;
1.123 markus 1060: if (options->forward_x11_trusted == -1)
1061: options->forward_x11_trusted = 0;
1.34 markus 1062: if (options->xauth_location == NULL)
1.80 markus 1063: options->xauth_location = _PATH_XAUTH;
1.17 markus 1064: if (options->gateway_ports == -1)
1065: options->gateway_ports = 0;
1066: if (options->use_privileged_port == -1)
1.65 markus 1067: options->use_privileged_port = 0;
1.17 markus 1068: if (options->rsa_authentication == -1)
1069: options->rsa_authentication = 1;
1.50 markus 1070: if (options->pubkey_authentication == -1)
1071: options->pubkey_authentication = 1;
1.78 markus 1072: if (options->challenge_response_authentication == -1)
1.83 markus 1073: options->challenge_response_authentication = 1;
1.118 markus 1074: if (options->gss_authentication == -1)
1.122 markus 1075: options->gss_authentication = 0;
1.118 markus 1076: if (options->gss_deleg_creds == -1)
1077: options->gss_deleg_creds = 0;
1.17 markus 1078: if (options->password_authentication == -1)
1079: options->password_authentication = 1;
1.48 markus 1080: if (options->kbd_interactive_authentication == -1)
1.59 markus 1081: options->kbd_interactive_authentication = 1;
1.17 markus 1082: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1083: options->rhosts_rsa_authentication = 0;
1.72 markus 1084: if (options->hostbased_authentication == -1)
1085: options->hostbased_authentication = 0;
1.17 markus 1086: if (options->batch_mode == -1)
1087: options->batch_mode = 0;
1088: if (options->check_host_ip == -1)
1089: options->check_host_ip = 1;
1090: if (options->strict_host_key_checking == -1)
1091: options->strict_host_key_checking = 2; /* 2 is default */
1092: if (options->compression == -1)
1093: options->compression = 0;
1.126 markus 1094: if (options->tcp_keep_alive == -1)
1095: options->tcp_keep_alive = 1;
1.17 markus 1096: if (options->compression_level == -1)
1097: options->compression_level = 6;
1098: if (options->port == -1)
1099: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1100: if (options->address_family == -1)
1101: options->address_family = AF_UNSPEC;
1.17 markus 1102: if (options->connection_attempts == -1)
1.84 markus 1103: options->connection_attempts = 1;
1.17 markus 1104: if (options->number_of_password_prompts == -1)
1105: options->number_of_password_prompts = 3;
1106: /* Selected in ssh_login(). */
1107: if (options->cipher == -1)
1108: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1109: /* options->ciphers, default set in myproposals.h */
1.62 markus 1110: /* options->macs, default set in myproposals.h */
1.76 markus 1111: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1112: if (options->protocol == SSH_PROTO_UNKNOWN)
1.69 markus 1113: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
1.17 markus 1114: if (options->num_identity_files == 0) {
1.50 markus 1115: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1116: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1117: options->identity_files[options->num_identity_files] =
1.61 deraadt 1118: xmalloc(len);
1119: snprintf(options->identity_files[options->num_identity_files++],
1120: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1121: }
1122: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1123: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1124: options->identity_files[options->num_identity_files] =
1125: xmalloc(len);
1126: snprintf(options->identity_files[options->num_identity_files++],
1127: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1128:
1.61 deraadt 1129: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1130: options->identity_files[options->num_identity_files] =
1.61 deraadt 1131: xmalloc(len);
1132: snprintf(options->identity_files[options->num_identity_files++],
1133: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.50 markus 1134: }
1.27 markus 1135: }
1.17 markus 1136: if (options->escape_char == -1)
1137: options->escape_char = '~';
1138: if (options->system_hostfile == NULL)
1.55 markus 1139: options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
1.17 markus 1140: if (options->user_hostfile == NULL)
1.55 markus 1141: options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
1.27 markus 1142: if (options->system_hostfile2 == NULL)
1.55 markus 1143: options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
1.27 markus 1144: if (options->user_hostfile2 == NULL)
1.55 markus 1145: options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
1.95 markus 1146: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1147: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1148: if (options->clear_forwardings == 1)
1149: clear_forwardings(options);
1.91 markus 1150: if (options->no_host_authentication_for_localhost == - 1)
1151: options->no_host_authentication_for_localhost = 0;
1.128 markus 1152: if (options->identities_only == -1)
1153: options->identities_only = 0;
1.101 markus 1154: if (options->enable_ssh_keysign == -1)
1155: options->enable_ssh_keysign = 0;
1.105 markus 1156: if (options->rekey_limit == -1)
1157: options->rekey_limit = 0;
1.107 jakob 1158: if (options->verify_host_key_dns == -1)
1159: options->verify_host_key_dns = 0;
1.127 markus 1160: if (options->server_alive_interval == -1)
1161: options->server_alive_interval = 0;
1162: if (options->server_alive_count_max == -1)
1163: options->server_alive_count_max = 3;
1.132 djm 1164: if (options->control_master == -1)
1165: options->control_master = 0;
1.136 djm 1166: if (options->hash_known_hosts == -1)
1167: options->hash_known_hosts = 0;
1.144 reyk 1168: if (options->tun_open == -1)
1.145 reyk 1169: options->tun_open = SSH_TUNMODE_NO;
1170: if (options->tun_local == -1)
1171: options->tun_local = SSH_TUNID_ANY;
1172: if (options->tun_remote == -1)
1173: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1174: if (options->permit_local_command == -1)
1175: options->permit_local_command = 0;
1176: /* options->local_command should not be set by default */
1.17 markus 1177: /* options->proxy_command should not be set by default */
1178: /* options->user will be set in the main program if appropriate */
1179: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1180: /* options->host_key_alias should not be set by default */
1.67 markus 1181: /* options->preferred_authentications will be set in ssh */
1.135 djm 1182: }
1183:
1184: /*
1185: * parse_forward
1186: * parses a string containing a port forwarding specification of the form:
1187: * [listenhost:]listenport:connecthost:connectport
1188: * returns number of arguments parsed or zero on error
1189: */
1190: int
1191: parse_forward(Forward *fwd, const char *fwdspec)
1192: {
1193: int i;
1194: char *p, *cp, *fwdarg[4];
1195:
1196: memset(fwd, '\0', sizeof(*fwd));
1197:
1198: cp = p = xstrdup(fwdspec);
1199:
1200: /* skip leading spaces */
1201: while (*cp && isspace(*cp))
1202: cp++;
1203:
1204: for (i = 0; i < 4; ++i)
1205: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1206: break;
1207:
1208: /* Check for trailing garbage in 4-arg case*/
1209: if (cp != NULL)
1210: i = 0; /* failure */
1211:
1212: switch (i) {
1213: case 3:
1214: fwd->listen_host = NULL;
1215: fwd->listen_port = a2port(fwdarg[0]);
1216: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1217: fwd->connect_port = a2port(fwdarg[2]);
1218: break;
1219:
1220: case 4:
1221: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1222: fwd->listen_port = a2port(fwdarg[1]);
1223: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1224: fwd->connect_port = a2port(fwdarg[3]);
1225: break;
1226: default:
1227: i = 0; /* failure */
1228: }
1229:
1230: xfree(p);
1231:
1232: if (fwd->listen_port == 0 && fwd->connect_port == 0)
1233: goto fail_free;
1234:
1235: if (fwd->connect_host != NULL &&
1236: strlen(fwd->connect_host) >= NI_MAXHOST)
1237: goto fail_free;
1238:
1239: return (i);
1240:
1241: fail_free:
1242: if (fwd->connect_host != NULL)
1243: xfree(fwd->connect_host);
1244: if (fwd->listen_host != NULL)
1245: xfree(fwd->listen_host);
1246: return (0);
1.1 deraadt 1247: }
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