Annotation of src/usr.bin/ssh/readconf.c, Revision 1.162
1.162 ! tedu 1: /* $OpenBSD: readconf.c,v 1.161 2007/01/21 01:45:35 stevesk Exp $ */
1.1 deraadt 2: /*
1.18 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Functions for reading the configuration files.
1.26 markus 7: *
1.46 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 13: */
1.1 deraadt 14:
1.147 stevesk 15: #include <sys/types.h>
16: #include <sys/stat.h>
1.152 stevesk 17: #include <sys/socket.h>
18:
19: #include <netinet/in.h>
1.148 stevesk 20:
21: #include <ctype.h>
1.154 stevesk 22: #include <errno.h>
1.155 stevesk 23: #include <netdb.h>
1.159 deraadt 24: #include <signal.h>
1.158 stevesk 25: #include <stdio.h>
1.157 stevesk 26: #include <string.h>
1.156 stevesk 27: #include <unistd.h>
1.1 deraadt 28:
1.159 deraadt 29: #include "xmalloc.h"
1.1 deraadt 30: #include "ssh.h"
1.25 markus 31: #include "compat.h"
1.58 markus 32: #include "cipher.h"
1.55 markus 33: #include "pathnames.h"
1.58 markus 34: #include "log.h"
1.159 deraadt 35: #include "key.h"
1.58 markus 36: #include "readconf.h"
37: #include "match.h"
38: #include "misc.h"
1.159 deraadt 39: #include "buffer.h"
1.62 markus 40: #include "kex.h"
41: #include "mac.h"
1.1 deraadt 42:
43: /* Format of the configuration file:
44:
45: # Configuration data is parsed as follows:
46: # 1. command line options
47: # 2. user-specific file
48: # 3. system-wide file
49: # Any configuration value is only changed the first time it is set.
50: # Thus, host-specific definitions should be at the beginning of the
51: # configuration file, and defaults at the end.
52:
53: # Host-specific declarations. These may override anything above. A single
54: # host may match multiple declarations; these are processed in the order
55: # that they are given in.
56:
57: Host *.ngs.fi ngs.fi
1.96 markus 58: User foo
1.1 deraadt 59:
60: Host fake.com
61: HostName another.host.name.real.org
62: User blaah
63: Port 34289
64: ForwardX11 no
65: ForwardAgent no
66:
67: Host books.com
68: RemoteForward 9999 shadows.cs.hut.fi:9999
69: Cipher 3des
70:
71: Host fascist.blob.com
72: Port 23123
73: User tylonen
74: PasswordAuthentication no
75:
76: Host puukko.hut.fi
77: User t35124p
78: ProxyCommand ssh-proxy %h %p
79:
80: Host *.fr
1.96 markus 81: PublicKeyAuthentication no
1.1 deraadt 82:
83: Host *.su
84: Cipher none
85: PasswordAuthentication no
86:
1.144 reyk 87: Host vpn.fake.com
88: Tunnel yes
89: TunnelDevice 3
90:
1.1 deraadt 91: # Defaults for various options
92: Host *
93: ForwardAgent no
1.50 markus 94: ForwardX11 no
1.1 deraadt 95: PasswordAuthentication yes
96: RSAAuthentication yes
97: RhostsRSAAuthentication yes
98: StrictHostKeyChecking yes
1.126 markus 99: TcpKeepAlive no
1.1 deraadt 100: IdentityFile ~/.ssh/identity
101: Port 22
102: EscapeChar ~
103:
104: */
105:
106: /* Keyword tokens. */
107:
1.17 markus 108: typedef enum {
109: oBadOption,
1.123 markus 110: oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts,
1.153 markus 111: oExitOnForwardFailure,
1.100 deraadt 112: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 113: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 114: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
115: oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
116: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
117: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 118: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 119: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 120: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 121: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 122: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.90 stevesk 123: oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
1.96 markus 124: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 125: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 126: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 127: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.136 djm 128: oSendEnv, oControlPath, oControlMaster, oHashKnownHosts,
1.144 reyk 129: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.110 jakob 130: oDeprecated, oUnsupported
1.1 deraadt 131: } OpCodes;
132:
133: /* Textual representations of the tokens. */
134:
1.17 markus 135: static struct {
136: const char *name;
137: OpCodes opcode;
138: } keywords[] = {
139: { "forwardagent", oForwardAgent },
140: { "forwardx11", oForwardX11 },
1.123 markus 141: { "forwardx11trusted", oForwardX11Trusted },
1.153 markus 142: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 143: { "xauthlocation", oXAuthLocation },
1.17 markus 144: { "gatewayports", oGatewayPorts },
145: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 146: { "rhostsauthentication", oDeprecated },
1.17 markus 147: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 148: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
149: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 150: { "rsaauthentication", oRSAAuthentication },
1.50 markus 151: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 152: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 153: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 154: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 155: { "challengeresponseauthentication", oChallengeResponseAuthentication },
156: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
157: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 158: { "kerberosauthentication", oUnsupported },
159: { "kerberostgtpassing", oUnsupported },
160: { "afstokenpassing", oUnsupported },
1.118 markus 161: #if defined(GSSAPI)
162: { "gssapiauthentication", oGssAuthentication },
163: { "gssapidelegatecredentials", oGssDelegateCreds },
164: #else
165: { "gssapiauthentication", oUnsupported },
166: { "gssapidelegatecredentials", oUnsupported },
167: #endif
1.96 markus 168: { "fallbacktorsh", oDeprecated },
169: { "usersh", oDeprecated },
1.17 markus 170: { "identityfile", oIdentityFile },
1.50 markus 171: { "identityfile2", oIdentityFile }, /* alias */
1.128 markus 172: { "identitiesonly", oIdentitiesOnly },
1.17 markus 173: { "hostname", oHostName },
1.52 markus 174: { "hostkeyalias", oHostKeyAlias },
1.17 markus 175: { "proxycommand", oProxyCommand },
176: { "port", oPort },
177: { "cipher", oCipher },
1.25 markus 178: { "ciphers", oCiphers },
1.62 markus 179: { "macs", oMacs },
1.25 markus 180: { "protocol", oProtocol },
1.17 markus 181: { "remoteforward", oRemoteForward },
182: { "localforward", oLocalForward },
183: { "user", oUser },
184: { "host", oHost },
185: { "escapechar", oEscapeChar },
186: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.81 markus 187: { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */
1.27 markus 188: { "globalknownhostsfile2", oGlobalKnownHostsFile2 },
1.81 markus 189: { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
1.17 markus 190: { "connectionattempts", oConnectionAttempts },
191: { "batchmode", oBatchMode },
192: { "checkhostip", oCheckHostIP },
193: { "stricthostkeychecking", oStrictHostKeyChecking },
194: { "compression", oCompression },
195: { "compressionlevel", oCompressionLevel },
1.126 markus 196: { "tcpkeepalive", oTCPKeepAlive },
197: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 198: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
199: { "loglevel", oLogLevel },
1.71 markus 200: { "dynamicforward", oDynamicForward },
1.67 markus 201: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 202: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 203: { "bindaddress", oBindAddress },
1.110 jakob 204: #ifdef SMARTCARD
1.85 jakob 205: { "smartcarddevice", oSmartcardDevice },
1.110 jakob 206: #else
207: { "smartcarddevice", oUnsupported },
208: #endif
1.93 deraadt 209: { "clearallforwardings", oClearAllForwardings },
1.101 markus 210: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 211: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 212: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 213: { "rekeylimit", oRekeyLimit },
1.111 djm 214: { "connecttimeout", oConnectTimeout },
1.112 djm 215: { "addressfamily", oAddressFamily },
1.127 markus 216: { "serveraliveinterval", oServerAliveInterval },
217: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 218: { "sendenv", oSendEnv },
1.132 djm 219: { "controlpath", oControlPath },
220: { "controlmaster", oControlMaster },
1.136 djm 221: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 222: { "tunnel", oTunnel },
223: { "tunneldevice", oTunnelDevice },
224: { "localcommand", oLocalCommand },
225: { "permitlocalcommand", oPermitLocalCommand },
1.92 stevesk 226: { NULL, oBadOption }
1.13 markus 227: };
228:
1.19 markus 229: /*
230: * Adds a local TCP/IP port forward to options. Never returns if there is an
231: * error.
232: */
1.1 deraadt 233:
1.26 markus 234: void
1.135 djm 235: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 236: {
1.17 markus 237: Forward *fwd;
238: extern uid_t original_real_uid;
1.135 djm 239: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 240: fatal("Privileged ports can only be forwarded by root.");
1.17 markus 241: if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
242: fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
243: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 244:
245: fwd->listen_host = (newfwd->listen_host == NULL) ?
246: NULL : xstrdup(newfwd->listen_host);
247: fwd->listen_port = newfwd->listen_port;
248: fwd->connect_host = xstrdup(newfwd->connect_host);
249: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 250: }
251:
1.19 markus 252: /*
253: * Adds a remote TCP/IP port forward to options. Never returns if there is
254: * an error.
255: */
1.1 deraadt 256:
1.26 markus 257: void
1.135 djm 258: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 259: {
1.17 markus 260: Forward *fwd;
261: if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
262: fatal("Too many remote forwards (max %d).",
1.93 deraadt 263: SSH_MAX_FORWARDS_PER_DIRECTION);
1.17 markus 264: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 265:
266: fwd->listen_host = (newfwd->listen_host == NULL) ?
267: NULL : xstrdup(newfwd->listen_host);
268: fwd->listen_port = newfwd->listen_port;
269: fwd->connect_host = xstrdup(newfwd->connect_host);
270: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 271: }
272:
1.90 stevesk 273: static void
274: clear_forwardings(Options *options)
275: {
276: int i;
277:
1.135 djm 278: for (i = 0; i < options->num_local_forwards; i++) {
1.138 dtucker 279: if (options->local_forwards[i].listen_host != NULL)
280: xfree(options->local_forwards[i].listen_host);
1.135 djm 281: xfree(options->local_forwards[i].connect_host);
282: }
1.90 stevesk 283: options->num_local_forwards = 0;
1.135 djm 284: for (i = 0; i < options->num_remote_forwards; i++) {
1.138 dtucker 285: if (options->remote_forwards[i].listen_host != NULL)
286: xfree(options->remote_forwards[i].listen_host);
1.135 djm 287: xfree(options->remote_forwards[i].connect_host);
288: }
1.90 stevesk 289: options->num_remote_forwards = 0;
1.145 reyk 290: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 291: }
292:
1.19 markus 293: /*
1.70 stevesk 294: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 295: */
1.1 deraadt 296:
1.26 markus 297: static OpCodes
1.17 markus 298: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 299: {
1.51 markus 300: u_int i;
1.1 deraadt 301:
1.17 markus 302: for (i = 0; keywords[i].name; i++)
1.20 markus 303: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 304: return keywords[i].opcode;
305:
1.75 stevesk 306: error("%s: line %d: Bad configuration option: %s",
307: filename, linenum, cp);
1.17 markus 308: return oBadOption;
1.1 deraadt 309: }
310:
1.19 markus 311: /*
312: * Processes a single option line as used in the configuration files. This
313: * only sets those values that have not already been set.
314: */
1.102 markus 315: #define WHITESPACE " \t\r\n"
1.1 deraadt 316:
1.14 markus 317: int
318: process_config_line(Options *options, const char *host,
1.17 markus 319: char *line, const char *filename, int linenum,
320: int *activep)
1.1 deraadt 321: {
1.135 djm 322: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
1.146 djm 323: int opcode, *intptr, value, value2, scale;
324: long long orig, val64;
1.102 markus 325: size_t len;
1.135 djm 326: Forward fwd;
1.106 djm 327:
328: /* Strip trailing whitespace */
1.139 deraadt 329: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 330: if (strchr(WHITESPACE, line[len]) == NULL)
331: break;
332: line[len] = '\0';
333: }
1.1 deraadt 334:
1.42 provos 335: s = line;
336: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 337: if ((keyword = strdelim(&s)) == NULL)
338: return 0;
1.42 provos 339: /* Ignore leading whitespace. */
340: if (*keyword == '\0')
1.43 markus 341: keyword = strdelim(&s);
1.56 deraadt 342: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 343: return 0;
344:
1.38 provos 345: opcode = parse_token(keyword, filename, linenum);
1.17 markus 346:
347: switch (opcode) {
348: case oBadOption:
1.19 markus 349: /* don't panic, but count bad options */
350: return -1;
1.17 markus 351: /* NOTREACHED */
1.111 djm 352: case oConnectTimeout:
353: intptr = &options->connection_timeout;
1.127 markus 354: parse_time:
1.111 djm 355: arg = strdelim(&s);
356: if (!arg || *arg == '\0')
357: fatal("%s line %d: missing time value.",
358: filename, linenum);
359: if ((value = convtime(arg)) == -1)
360: fatal("%s line %d: invalid time value.",
361: filename, linenum);
1.160 dtucker 362: if (*activep && *intptr == -1)
1.111 djm 363: *intptr = value;
364: break;
365:
1.17 markus 366: case oForwardAgent:
367: intptr = &options->forward_agent;
368: parse_flag:
1.42 provos 369: arg = strdelim(&s);
1.40 ho 370: if (!arg || *arg == '\0')
1.17 markus 371: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
372: value = 0; /* To avoid compiler warning... */
1.38 provos 373: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 374: value = 1;
1.38 provos 375: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 376: value = 0;
377: else
378: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
379: if (*activep && *intptr == -1)
380: *intptr = value;
381: break;
382:
383: case oForwardX11:
384: intptr = &options->forward_x11;
385: goto parse_flag;
386:
1.123 markus 387: case oForwardX11Trusted:
388: intptr = &options->forward_x11_trusted;
389: goto parse_flag;
390:
1.17 markus 391: case oGatewayPorts:
392: intptr = &options->gateway_ports;
393: goto parse_flag;
394:
1.153 markus 395: case oExitOnForwardFailure:
396: intptr = &options->exit_on_forward_failure;
397: goto parse_flag;
398:
1.17 markus 399: case oUsePrivilegedPort:
400: intptr = &options->use_privileged_port;
401: goto parse_flag;
402:
403: case oPasswordAuthentication:
404: intptr = &options->password_authentication;
405: goto parse_flag;
406:
1.48 markus 407: case oKbdInteractiveAuthentication:
408: intptr = &options->kbd_interactive_authentication;
409: goto parse_flag;
410:
411: case oKbdInteractiveDevices:
412: charptr = &options->kbd_interactive_devices;
413: goto parse_string;
414:
1.50 markus 415: case oPubkeyAuthentication:
416: intptr = &options->pubkey_authentication;
1.30 markus 417: goto parse_flag;
418:
1.17 markus 419: case oRSAAuthentication:
420: intptr = &options->rsa_authentication;
421: goto parse_flag;
422:
423: case oRhostsRSAAuthentication:
424: intptr = &options->rhosts_rsa_authentication;
425: goto parse_flag;
426:
1.72 markus 427: case oHostbasedAuthentication:
428: intptr = &options->hostbased_authentication;
429: goto parse_flag;
430:
1.59 markus 431: case oChallengeResponseAuthentication:
1.78 markus 432: intptr = &options->challenge_response_authentication;
1.17 markus 433: goto parse_flag;
1.108 jakob 434:
1.118 markus 435: case oGssAuthentication:
436: intptr = &options->gss_authentication;
437: goto parse_flag;
438:
439: case oGssDelegateCreds:
440: intptr = &options->gss_deleg_creds;
441: goto parse_flag;
442:
1.17 markus 443: case oBatchMode:
444: intptr = &options->batch_mode;
445: goto parse_flag;
446:
447: case oCheckHostIP:
448: intptr = &options->check_host_ip;
449: goto parse_flag;
450:
1.107 jakob 451: case oVerifyHostKeyDNS:
452: intptr = &options->verify_host_key_dns;
1.125 jakob 453: goto parse_yesnoask;
1.107 jakob 454:
1.17 markus 455: case oStrictHostKeyChecking:
456: intptr = &options->strict_host_key_checking;
1.125 jakob 457: parse_yesnoask:
1.42 provos 458: arg = strdelim(&s);
1.40 ho 459: if (!arg || *arg == '\0')
1.60 stevesk 460: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 461: filename, linenum);
1.17 markus 462: value = 0; /* To avoid compiler warning... */
1.38 provos 463: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 464: value = 1;
1.38 provos 465: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 466: value = 0;
1.38 provos 467: else if (strcmp(arg, "ask") == 0)
1.17 markus 468: value = 2;
469: else
470: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
471: if (*activep && *intptr == -1)
472: *intptr = value;
473: break;
474:
475: case oCompression:
476: intptr = &options->compression;
477: goto parse_flag;
478:
1.126 markus 479: case oTCPKeepAlive:
480: intptr = &options->tcp_keep_alive;
1.17 markus 481: goto parse_flag;
482:
1.91 markus 483: case oNoHostAuthenticationForLocalhost:
484: intptr = &options->no_host_authentication_for_localhost;
485: goto parse_flag;
486:
1.17 markus 487: case oNumberOfPasswordPrompts:
488: intptr = &options->number_of_password_prompts;
489: goto parse_int;
490:
491: case oCompressionLevel:
492: intptr = &options->compression_level;
493: goto parse_int;
494:
1.105 markus 495: case oRekeyLimit:
496: intptr = &options->rekey_limit;
497: arg = strdelim(&s);
498: if (!arg || *arg == '\0')
499: fatal("%.200s line %d: Missing argument.", filename, linenum);
500: if (arg[0] < '0' || arg[0] > '9')
501: fatal("%.200s line %d: Bad number.", filename, linenum);
1.146 djm 502: orig = val64 = strtoll(arg, &endofnumber, 10);
1.105 markus 503: if (arg == endofnumber)
504: fatal("%.200s line %d: Bad number.", filename, linenum);
505: switch (toupper(*endofnumber)) {
1.146 djm 506: case '\0':
507: scale = 1;
508: break;
1.105 markus 509: case 'K':
1.146 djm 510: scale = 1<<10;
1.105 markus 511: break;
512: case 'M':
1.146 djm 513: scale = 1<<20;
1.105 markus 514: break;
515: case 'G':
1.146 djm 516: scale = 1<<30;
1.105 markus 517: break;
1.146 djm 518: default:
519: fatal("%.200s line %d: Invalid RekeyLimit suffix",
520: filename, linenum);
1.105 markus 521: }
1.146 djm 522: val64 *= scale;
523: /* detect integer wrap and too-large limits */
524: if ((val64 / scale) != orig || val64 > INT_MAX)
525: fatal("%.200s line %d: RekeyLimit too large",
526: filename, linenum);
527: if (val64 < 16)
528: fatal("%.200s line %d: RekeyLimit too small",
529: filename, linenum);
1.105 markus 530: if (*activep && *intptr == -1)
1.146 djm 531: *intptr = (int)val64;
1.105 markus 532: break;
533:
1.17 markus 534: case oIdentityFile:
1.42 provos 535: arg = strdelim(&s);
1.40 ho 536: if (!arg || *arg == '\0')
1.17 markus 537: fatal("%.200s line %d: Missing argument.", filename, linenum);
538: if (*activep) {
1.50 markus 539: intptr = &options->num_identity_files;
1.27 markus 540: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 541: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 542: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.161 stevesk 543: charptr = &options->identity_files[*intptr];
1.38 provos 544: *charptr = xstrdup(arg);
1.27 markus 545: *intptr = *intptr + 1;
1.17 markus 546: }
547: break;
548:
1.34 markus 549: case oXAuthLocation:
550: charptr=&options->xauth_location;
551: goto parse_string;
552:
1.17 markus 553: case oUser:
554: charptr = &options->user;
555: parse_string:
1.42 provos 556: arg = strdelim(&s);
1.40 ho 557: if (!arg || *arg == '\0')
1.17 markus 558: fatal("%.200s line %d: Missing argument.", filename, linenum);
559: if (*activep && *charptr == NULL)
1.38 provos 560: *charptr = xstrdup(arg);
1.17 markus 561: break;
562:
563: case oGlobalKnownHostsFile:
564: charptr = &options->system_hostfile;
565: goto parse_string;
566:
567: case oUserKnownHostsFile:
568: charptr = &options->user_hostfile;
569: goto parse_string;
570:
1.27 markus 571: case oGlobalKnownHostsFile2:
572: charptr = &options->system_hostfile2;
573: goto parse_string;
574:
575: case oUserKnownHostsFile2:
576: charptr = &options->user_hostfile2;
577: goto parse_string;
578:
1.17 markus 579: case oHostName:
580: charptr = &options->hostname;
581: goto parse_string;
582:
1.52 markus 583: case oHostKeyAlias:
584: charptr = &options->host_key_alias;
585: goto parse_string;
586:
1.67 markus 587: case oPreferredAuthentications:
588: charptr = &options->preferred_authentications;
589: goto parse_string;
590:
1.77 markus 591: case oBindAddress:
592: charptr = &options->bind_address;
593: goto parse_string;
594:
1.85 jakob 595: case oSmartcardDevice:
1.86 markus 596: charptr = &options->smartcard_device;
597: goto parse_string;
1.85 jakob 598:
1.17 markus 599: case oProxyCommand:
1.144 reyk 600: charptr = &options->proxy_command;
601: parse_command:
1.113 markus 602: if (s == NULL)
603: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 604: len = strspn(s, WHITESPACE "=");
1.17 markus 605: if (*activep && *charptr == NULL)
1.102 markus 606: *charptr = xstrdup(s + len);
1.17 markus 607: return 0;
608:
609: case oPort:
610: intptr = &options->port;
611: parse_int:
1.42 provos 612: arg = strdelim(&s);
1.40 ho 613: if (!arg || *arg == '\0')
1.17 markus 614: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 615: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 616: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 617:
618: /* Octal, decimal, or hex format? */
1.38 provos 619: value = strtol(arg, &endofnumber, 0);
620: if (arg == endofnumber)
1.21 markus 621: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 622: if (*activep && *intptr == -1)
623: *intptr = value;
624: break;
625:
626: case oConnectionAttempts:
627: intptr = &options->connection_attempts;
628: goto parse_int;
629:
630: case oCipher:
631: intptr = &options->cipher;
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: value = cipher_number(arg);
1.17 markus 636: if (value == -1)
637: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 638: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 639: if (*activep && *intptr == -1)
640: *intptr = value;
641: break;
642:
1.25 markus 643: case oCiphers:
1.42 provos 644: arg = strdelim(&s);
1.40 ho 645: if (!arg || *arg == '\0')
1.32 markus 646: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 647: if (!ciphers_valid(arg))
1.31 markus 648: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 649: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 650: if (*activep && options->ciphers == NULL)
1.38 provos 651: options->ciphers = xstrdup(arg);
1.25 markus 652: break;
653:
1.62 markus 654: case oMacs:
655: arg = strdelim(&s);
656: if (!arg || *arg == '\0')
657: fatal("%.200s line %d: Missing argument.", filename, linenum);
658: if (!mac_valid(arg))
659: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 660: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 661: if (*activep && options->macs == NULL)
662: options->macs = xstrdup(arg);
663: break;
664:
1.76 markus 665: case oHostKeyAlgorithms:
666: arg = strdelim(&s);
667: if (!arg || *arg == '\0')
668: fatal("%.200s line %d: Missing argument.", filename, linenum);
669: if (!key_names_valid2(arg))
670: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 671: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 672: if (*activep && options->hostkeyalgorithms == NULL)
673: options->hostkeyalgorithms = xstrdup(arg);
674: break;
675:
1.25 markus 676: case oProtocol:
677: intptr = &options->protocol;
1.42 provos 678: arg = strdelim(&s);
1.40 ho 679: if (!arg || *arg == '\0')
1.32 markus 680: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 681: value = proto_spec(arg);
1.25 markus 682: if (value == SSH_PROTO_UNKNOWN)
683: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 684: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 685: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
686: *intptr = value;
687: break;
688:
1.17 markus 689: case oLogLevel:
690: intptr = (int *) &options->log_level;
1.42 provos 691: arg = strdelim(&s);
1.38 provos 692: value = log_level_number(arg);
1.95 markus 693: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 694: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 695: filename, linenum, arg ? arg : "<NONE>");
1.95 markus 696: if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET)
1.17 markus 697: *intptr = (LogLevel) value;
698: break;
699:
1.88 stevesk 700: case oLocalForward:
1.17 markus 701: case oRemoteForward:
1.42 provos 702: arg = strdelim(&s);
1.135 djm 703: if (arg == NULL || *arg == '\0')
1.88 stevesk 704: fatal("%.200s line %d: Missing port argument.",
705: filename, linenum);
1.135 djm 706: arg2 = strdelim(&s);
707: if (arg2 == NULL || *arg2 == '\0')
708: fatal("%.200s line %d: Missing target argument.",
1.88 stevesk 709: filename, linenum);
1.135 djm 710:
711: /* construct a string for parse_forward */
712: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
713:
714: if (parse_forward(&fwd, fwdarg) == 0)
1.88 stevesk 715: fatal("%.200s line %d: Bad forwarding specification.",
716: filename, linenum);
1.135 djm 717:
1.88 stevesk 718: if (*activep) {
719: if (opcode == oLocalForward)
1.135 djm 720: add_local_forward(options, &fwd);
1.88 stevesk 721: else if (opcode == oRemoteForward)
1.135 djm 722: add_remote_forward(options, &fwd);
1.88 stevesk 723: }
1.17 markus 724: break;
1.71 markus 725:
726: case oDynamicForward:
727: arg = strdelim(&s);
728: if (!arg || *arg == '\0')
729: fatal("%.200s line %d: Missing port argument.",
730: filename, linenum);
1.135 djm 731: memset(&fwd, '\0', sizeof(fwd));
732: fwd.connect_host = "socks";
733: fwd.listen_host = hpdelim(&arg);
734: if (fwd.listen_host == NULL ||
735: strlen(fwd.listen_host) >= NI_MAXHOST)
736: fatal("%.200s line %d: Bad forwarding specification.",
737: filename, linenum);
738: if (arg) {
739: fwd.listen_port = a2port(arg);
740: fwd.listen_host = cleanhostname(fwd.listen_host);
741: } else {
742: fwd.listen_port = a2port(fwd.listen_host);
1.143 djm 743: fwd.listen_host = NULL;
1.135 djm 744: }
745: if (fwd.listen_port == 0)
1.71 markus 746: fatal("%.200s line %d: Badly formatted port number.",
747: filename, linenum);
1.87 markus 748: if (*activep)
1.135 djm 749: add_local_forward(options, &fwd);
1.72 markus 750: break;
1.17 markus 751:
1.90 stevesk 752: case oClearAllForwardings:
753: intptr = &options->clear_forwardings;
754: goto parse_flag;
755:
1.17 markus 756: case oHost:
757: *activep = 0;
1.42 provos 758: while ((arg = strdelim(&s)) != NULL && *arg != '\0')
1.38 provos 759: if (match_pattern(host, arg)) {
760: debug("Applying options for %.100s", arg);
1.17 markus 761: *activep = 1;
762: break;
763: }
1.42 provos 764: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 765: return 0;
766:
767: case oEscapeChar:
768: intptr = &options->escape_char;
1.42 provos 769: arg = strdelim(&s);
1.40 ho 770: if (!arg || *arg == '\0')
1.17 markus 771: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 772: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 773: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
774: value = (u_char) arg[1] & 31;
1.38 provos 775: else if (strlen(arg) == 1)
1.51 markus 776: value = (u_char) arg[0];
1.38 provos 777: else if (strcmp(arg, "none") == 0)
1.79 stevesk 778: value = SSH_ESCAPECHAR_NONE;
1.17 markus 779: else {
780: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 781: filename, linenum);
1.17 markus 782: /* NOTREACHED */
783: value = 0; /* Avoid compiler warning. */
784: }
785: if (*activep && *intptr == -1)
786: *intptr = value;
1.112 djm 787: break;
788:
789: case oAddressFamily:
790: arg = strdelim(&s);
1.140 markus 791: if (!arg || *arg == '\0')
792: fatal("%s line %d: missing address family.",
793: filename, linenum);
1.114 djm 794: intptr = &options->address_family;
1.112 djm 795: if (strcasecmp(arg, "inet") == 0)
1.114 djm 796: value = AF_INET;
1.112 djm 797: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 798: value = AF_INET6;
1.112 djm 799: else if (strcasecmp(arg, "any") == 0)
1.114 djm 800: value = AF_UNSPEC;
1.112 djm 801: else
802: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 803: if (*activep && *intptr == -1)
804: *intptr = value;
1.17 markus 805: break;
806:
1.101 markus 807: case oEnableSSHKeysign:
808: intptr = &options->enable_ssh_keysign;
809: goto parse_flag;
810:
1.128 markus 811: case oIdentitiesOnly:
812: intptr = &options->identities_only;
813: goto parse_flag;
814:
1.127 markus 815: case oServerAliveInterval:
816: intptr = &options->server_alive_interval;
817: goto parse_time;
818:
819: case oServerAliveCountMax:
820: intptr = &options->server_alive_count_max;
821: goto parse_int;
822:
1.130 djm 823: case oSendEnv:
824: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
825: if (strchr(arg, '=') != NULL)
826: fatal("%s line %d: Invalid environment name.",
827: filename, linenum);
1.137 djm 828: if (!*activep)
829: continue;
1.130 djm 830: if (options->num_send_env >= MAX_SEND_ENV)
831: fatal("%s line %d: too many send env.",
832: filename, linenum);
833: options->send_env[options->num_send_env++] =
834: xstrdup(arg);
835: }
836: break;
837:
1.132 djm 838: case oControlPath:
839: charptr = &options->control_path;
840: goto parse_string;
841:
842: case oControlMaster:
843: intptr = &options->control_master;
1.141 djm 844: arg = strdelim(&s);
845: if (!arg || *arg == '\0')
846: fatal("%.200s line %d: Missing ControlMaster argument.",
847: filename, linenum);
848: value = 0; /* To avoid compiler warning... */
849: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
850: value = SSHCTL_MASTER_YES;
851: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
852: value = SSHCTL_MASTER_NO;
853: else if (strcmp(arg, "auto") == 0)
854: value = SSHCTL_MASTER_AUTO;
855: else if (strcmp(arg, "ask") == 0)
856: value = SSHCTL_MASTER_ASK;
857: else if (strcmp(arg, "autoask") == 0)
858: value = SSHCTL_MASTER_AUTO_ASK;
859: else
860: fatal("%.200s line %d: Bad ControlMaster argument.",
861: filename, linenum);
862: if (*activep && *intptr == -1)
863: *intptr = value;
864: break;
1.132 djm 865:
1.136 djm 866: case oHashKnownHosts:
867: intptr = &options->hash_known_hosts;
868: goto parse_flag;
869:
1.144 reyk 870: case oTunnel:
871: intptr = &options->tun_open;
1.145 reyk 872: arg = strdelim(&s);
873: if (!arg || *arg == '\0')
874: fatal("%s line %d: Missing yes/point-to-point/"
875: "ethernet/no argument.", filename, linenum);
876: value = 0; /* silence compiler */
877: if (strcasecmp(arg, "ethernet") == 0)
878: value = SSH_TUNMODE_ETHERNET;
879: else if (strcasecmp(arg, "point-to-point") == 0)
880: value = SSH_TUNMODE_POINTOPOINT;
881: else if (strcasecmp(arg, "yes") == 0)
882: value = SSH_TUNMODE_DEFAULT;
883: else if (strcasecmp(arg, "no") == 0)
884: value = SSH_TUNMODE_NO;
885: else
886: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
887: "no argument: %s", filename, linenum, arg);
888: if (*activep)
889: *intptr = value;
890: break;
1.144 reyk 891:
892: case oTunnelDevice:
893: arg = strdelim(&s);
894: if (!arg || *arg == '\0')
895: fatal("%.200s line %d: Missing argument.", filename, linenum);
896: value = a2tun(arg, &value2);
1.145 reyk 897: if (value == SSH_TUNID_ERR)
1.144 reyk 898: fatal("%.200s line %d: Bad tun device.", filename, linenum);
899: if (*activep) {
900: options->tun_local = value;
901: options->tun_remote = value2;
902: }
903: break;
904:
905: case oLocalCommand:
906: charptr = &options->local_command;
907: goto parse_command;
908:
909: case oPermitLocalCommand:
910: intptr = &options->permit_local_command;
911: goto parse_flag;
912:
1.96 markus 913: case oDeprecated:
1.98 markus 914: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 915: filename, linenum, keyword);
1.98 markus 916: return 0;
1.96 markus 917:
1.110 jakob 918: case oUnsupported:
919: error("%s line %d: Unsupported option \"%s\"",
920: filename, linenum, keyword);
921: return 0;
922:
1.17 markus 923: default:
924: fatal("process_config_line: Unimplemented opcode %d", opcode);
925: }
926:
927: /* Check that there is no garbage at end of line. */
1.57 djm 928: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 929: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 930: filename, linenum, arg);
1.39 ho 931: }
1.17 markus 932: return 0;
1.1 deraadt 933: }
934:
935:
1.19 markus 936: /*
937: * Reads the config file and modifies the options accordingly. Options
938: * should already be initialized before this call. This never returns if
1.89 stevesk 939: * there is an error. If the file does not exist, this returns 0.
1.19 markus 940: */
1.1 deraadt 941:
1.89 stevesk 942: int
1.134 deraadt 943: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 944: int checkperm)
1.1 deraadt 945: {
1.17 markus 946: FILE *f;
947: char line[1024];
948: int active, linenum;
949: int bad_options = 0;
950:
951: /* Open the file. */
1.129 djm 952: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 953: return 0;
1.129 djm 954:
955: if (checkperm) {
956: struct stat sb;
1.134 deraadt 957:
1.131 dtucker 958: if (fstat(fileno(f), &sb) == -1)
1.129 djm 959: fatal("fstat %s: %s", filename, strerror(errno));
960: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 961: (sb.st_mode & 022) != 0))
1.129 djm 962: fatal("Bad owner or permissions on %s", filename);
963: }
1.17 markus 964:
965: debug("Reading configuration data %.200s", filename);
966:
1.19 markus 967: /*
968: * Mark that we are now processing the options. This flag is turned
969: * on/off by Host specifications.
970: */
1.17 markus 971: active = 1;
972: linenum = 0;
973: while (fgets(line, sizeof(line), f)) {
974: /* Update line number counter. */
975: linenum++;
976: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
977: bad_options++;
978: }
979: fclose(f);
980: if (bad_options > 0)
1.64 millert 981: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 982: filename, bad_options);
1.89 stevesk 983: return 1;
1.1 deraadt 984: }
985:
1.19 markus 986: /*
987: * Initializes options to special values that indicate that they have not yet
988: * been set. Read_config_file will only set options with this value. Options
989: * are processed in the following order: command line, user config file,
990: * system config file. Last, fill_default_options is called.
991: */
1.1 deraadt 992:
1.26 markus 993: void
1.17 markus 994: initialize_options(Options * options)
1.1 deraadt 995: {
1.17 markus 996: memset(options, 'X', sizeof(*options));
997: options->forward_agent = -1;
998: options->forward_x11 = -1;
1.123 markus 999: options->forward_x11_trusted = -1;
1.153 markus 1000: options->exit_on_forward_failure = -1;
1.34 markus 1001: options->xauth_location = NULL;
1.17 markus 1002: options->gateway_ports = -1;
1003: options->use_privileged_port = -1;
1004: options->rsa_authentication = -1;
1.50 markus 1005: options->pubkey_authentication = -1;
1.78 markus 1006: options->challenge_response_authentication = -1;
1.118 markus 1007: options->gss_authentication = -1;
1008: options->gss_deleg_creds = -1;
1.17 markus 1009: options->password_authentication = -1;
1.48 markus 1010: options->kbd_interactive_authentication = -1;
1011: options->kbd_interactive_devices = NULL;
1.17 markus 1012: options->rhosts_rsa_authentication = -1;
1.72 markus 1013: options->hostbased_authentication = -1;
1.17 markus 1014: options->batch_mode = -1;
1015: options->check_host_ip = -1;
1016: options->strict_host_key_checking = -1;
1017: options->compression = -1;
1.126 markus 1018: options->tcp_keep_alive = -1;
1.17 markus 1019: options->compression_level = -1;
1020: options->port = -1;
1.114 djm 1021: options->address_family = -1;
1.17 markus 1022: options->connection_attempts = -1;
1.111 djm 1023: options->connection_timeout = -1;
1.17 markus 1024: options->number_of_password_prompts = -1;
1025: options->cipher = -1;
1.25 markus 1026: options->ciphers = NULL;
1.62 markus 1027: options->macs = NULL;
1.76 markus 1028: options->hostkeyalgorithms = NULL;
1.25 markus 1029: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1030: options->num_identity_files = 0;
1031: options->hostname = NULL;
1.52 markus 1032: options->host_key_alias = NULL;
1.17 markus 1033: options->proxy_command = NULL;
1034: options->user = NULL;
1035: options->escape_char = -1;
1036: options->system_hostfile = NULL;
1037: options->user_hostfile = NULL;
1.27 markus 1038: options->system_hostfile2 = NULL;
1039: options->user_hostfile2 = NULL;
1.17 markus 1040: options->num_local_forwards = 0;
1041: options->num_remote_forwards = 0;
1.90 stevesk 1042: options->clear_forwardings = -1;
1.95 markus 1043: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1044: options->preferred_authentications = NULL;
1.77 markus 1045: options->bind_address = NULL;
1.86 markus 1046: options->smartcard_device = NULL;
1.101 markus 1047: options->enable_ssh_keysign = - 1;
1.91 markus 1048: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1049: options->identities_only = - 1;
1.105 markus 1050: options->rekey_limit = - 1;
1.107 jakob 1051: options->verify_host_key_dns = -1;
1.127 markus 1052: options->server_alive_interval = -1;
1053: options->server_alive_count_max = -1;
1.130 djm 1054: options->num_send_env = 0;
1.132 djm 1055: options->control_path = NULL;
1056: options->control_master = -1;
1.136 djm 1057: options->hash_known_hosts = -1;
1.144 reyk 1058: options->tun_open = -1;
1059: options->tun_local = -1;
1060: options->tun_remote = -1;
1061: options->local_command = NULL;
1062: options->permit_local_command = -1;
1.1 deraadt 1063: }
1064:
1.19 markus 1065: /*
1066: * Called after processing other sources of option data, this fills those
1067: * options for which no value has been specified with their default values.
1068: */
1.1 deraadt 1069:
1.26 markus 1070: void
1.17 markus 1071: fill_default_options(Options * options)
1.1 deraadt 1072: {
1.61 deraadt 1073: int len;
1074:
1.17 markus 1075: if (options->forward_agent == -1)
1.33 markus 1076: options->forward_agent = 0;
1.17 markus 1077: if (options->forward_x11 == -1)
1.23 markus 1078: options->forward_x11 = 0;
1.123 markus 1079: if (options->forward_x11_trusted == -1)
1080: options->forward_x11_trusted = 0;
1.153 markus 1081: if (options->exit_on_forward_failure == -1)
1082: options->exit_on_forward_failure = 0;
1.34 markus 1083: if (options->xauth_location == NULL)
1.80 markus 1084: options->xauth_location = _PATH_XAUTH;
1.17 markus 1085: if (options->gateway_ports == -1)
1086: options->gateway_ports = 0;
1087: if (options->use_privileged_port == -1)
1.65 markus 1088: options->use_privileged_port = 0;
1.17 markus 1089: if (options->rsa_authentication == -1)
1090: options->rsa_authentication = 1;
1.50 markus 1091: if (options->pubkey_authentication == -1)
1092: options->pubkey_authentication = 1;
1.78 markus 1093: if (options->challenge_response_authentication == -1)
1.83 markus 1094: options->challenge_response_authentication = 1;
1.118 markus 1095: if (options->gss_authentication == -1)
1.122 markus 1096: options->gss_authentication = 0;
1.118 markus 1097: if (options->gss_deleg_creds == -1)
1098: options->gss_deleg_creds = 0;
1.17 markus 1099: if (options->password_authentication == -1)
1100: options->password_authentication = 1;
1.48 markus 1101: if (options->kbd_interactive_authentication == -1)
1.59 markus 1102: options->kbd_interactive_authentication = 1;
1.17 markus 1103: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1104: options->rhosts_rsa_authentication = 0;
1.72 markus 1105: if (options->hostbased_authentication == -1)
1106: options->hostbased_authentication = 0;
1.17 markus 1107: if (options->batch_mode == -1)
1108: options->batch_mode = 0;
1109: if (options->check_host_ip == -1)
1110: options->check_host_ip = 1;
1111: if (options->strict_host_key_checking == -1)
1112: options->strict_host_key_checking = 2; /* 2 is default */
1113: if (options->compression == -1)
1114: options->compression = 0;
1.126 markus 1115: if (options->tcp_keep_alive == -1)
1116: options->tcp_keep_alive = 1;
1.17 markus 1117: if (options->compression_level == -1)
1118: options->compression_level = 6;
1119: if (options->port == -1)
1120: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1121: if (options->address_family == -1)
1122: options->address_family = AF_UNSPEC;
1.17 markus 1123: if (options->connection_attempts == -1)
1.84 markus 1124: options->connection_attempts = 1;
1.17 markus 1125: if (options->number_of_password_prompts == -1)
1126: options->number_of_password_prompts = 3;
1127: /* Selected in ssh_login(). */
1128: if (options->cipher == -1)
1129: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1130: /* options->ciphers, default set in myproposals.h */
1.62 markus 1131: /* options->macs, default set in myproposals.h */
1.76 markus 1132: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1133: if (options->protocol == SSH_PROTO_UNKNOWN)
1.69 markus 1134: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
1.17 markus 1135: if (options->num_identity_files == 0) {
1.50 markus 1136: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1137: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1138: options->identity_files[options->num_identity_files] =
1.61 deraadt 1139: xmalloc(len);
1140: snprintf(options->identity_files[options->num_identity_files++],
1141: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1142: }
1143: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1144: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1145: options->identity_files[options->num_identity_files] =
1146: xmalloc(len);
1147: snprintf(options->identity_files[options->num_identity_files++],
1148: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1149:
1.61 deraadt 1150: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1151: options->identity_files[options->num_identity_files] =
1.61 deraadt 1152: xmalloc(len);
1153: snprintf(options->identity_files[options->num_identity_files++],
1154: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.50 markus 1155: }
1.27 markus 1156: }
1.17 markus 1157: if (options->escape_char == -1)
1158: options->escape_char = '~';
1159: if (options->system_hostfile == NULL)
1.55 markus 1160: options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
1.17 markus 1161: if (options->user_hostfile == NULL)
1.55 markus 1162: options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
1.27 markus 1163: if (options->system_hostfile2 == NULL)
1.55 markus 1164: options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
1.27 markus 1165: if (options->user_hostfile2 == NULL)
1.55 markus 1166: options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
1.95 markus 1167: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1168: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1169: if (options->clear_forwardings == 1)
1170: clear_forwardings(options);
1.91 markus 1171: if (options->no_host_authentication_for_localhost == - 1)
1172: options->no_host_authentication_for_localhost = 0;
1.128 markus 1173: if (options->identities_only == -1)
1174: options->identities_only = 0;
1.101 markus 1175: if (options->enable_ssh_keysign == -1)
1176: options->enable_ssh_keysign = 0;
1.105 markus 1177: if (options->rekey_limit == -1)
1178: options->rekey_limit = 0;
1.107 jakob 1179: if (options->verify_host_key_dns == -1)
1180: options->verify_host_key_dns = 0;
1.127 markus 1181: if (options->server_alive_interval == -1)
1182: options->server_alive_interval = 0;
1183: if (options->server_alive_count_max == -1)
1184: options->server_alive_count_max = 3;
1.132 djm 1185: if (options->control_master == -1)
1186: options->control_master = 0;
1.136 djm 1187: if (options->hash_known_hosts == -1)
1188: options->hash_known_hosts = 0;
1.144 reyk 1189: if (options->tun_open == -1)
1.145 reyk 1190: options->tun_open = SSH_TUNMODE_NO;
1191: if (options->tun_local == -1)
1192: options->tun_local = SSH_TUNID_ANY;
1193: if (options->tun_remote == -1)
1194: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1195: if (options->permit_local_command == -1)
1196: options->permit_local_command = 0;
1197: /* options->local_command should not be set by default */
1.17 markus 1198: /* options->proxy_command should not be set by default */
1199: /* options->user will be set in the main program if appropriate */
1200: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1201: /* options->host_key_alias should not be set by default */
1.67 markus 1202: /* options->preferred_authentications will be set in ssh */
1.135 djm 1203: }
1204:
1205: /*
1206: * parse_forward
1207: * parses a string containing a port forwarding specification of the form:
1208: * [listenhost:]listenport:connecthost:connectport
1209: * returns number of arguments parsed or zero on error
1210: */
1211: int
1212: parse_forward(Forward *fwd, const char *fwdspec)
1213: {
1214: int i;
1215: char *p, *cp, *fwdarg[4];
1216:
1217: memset(fwd, '\0', sizeof(*fwd));
1218:
1219: cp = p = xstrdup(fwdspec);
1220:
1221: /* skip leading spaces */
1.162 ! tedu 1222: while (isspace(*cp))
1.135 djm 1223: cp++;
1224:
1225: for (i = 0; i < 4; ++i)
1226: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1227: break;
1228:
1229: /* Check for trailing garbage in 4-arg case*/
1230: if (cp != NULL)
1231: i = 0; /* failure */
1232:
1233: switch (i) {
1234: case 3:
1235: fwd->listen_host = NULL;
1236: fwd->listen_port = a2port(fwdarg[0]);
1237: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1238: fwd->connect_port = a2port(fwdarg[2]);
1239: break;
1240:
1241: case 4:
1242: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1243: fwd->listen_port = a2port(fwdarg[1]);
1244: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1245: fwd->connect_port = a2port(fwdarg[3]);
1246: break;
1247: default:
1248: i = 0; /* failure */
1249: }
1250:
1251: xfree(p);
1252:
1253: if (fwd->listen_port == 0 && fwd->connect_port == 0)
1254: goto fail_free;
1255:
1256: if (fwd->connect_host != NULL &&
1257: strlen(fwd->connect_host) >= NI_MAXHOST)
1258: goto fail_free;
1259:
1260: return (i);
1261:
1262: fail_free:
1263: if (fwd->connect_host != NULL)
1264: xfree(fwd->connect_host);
1265: if (fwd->listen_host != NULL)
1266: xfree(fwd->listen_host);
1267: return (0);
1.1 deraadt 1268: }
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