Annotation of src/usr.bin/ssh/readconf.c, Revision 1.182
1.182 ! dtucker 1: /* $OpenBSD: readconf.c,v 1.178 2009/10/08 14:03:41 markus 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,
1.182 ! dtucker 130: oVisualHostKey, oUseRoaming, oZeroKnowledgePasswordAuthentication,
! 131: oDeprecated, oUnsupported
1.1 deraadt 132: } OpCodes;
133:
134: /* Textual representations of the tokens. */
135:
1.17 markus 136: static struct {
137: const char *name;
138: OpCodes opcode;
139: } keywords[] = {
140: { "forwardagent", oForwardAgent },
141: { "forwardx11", oForwardX11 },
1.123 markus 142: { "forwardx11trusted", oForwardX11Trusted },
1.153 markus 143: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 144: { "xauthlocation", oXAuthLocation },
1.17 markus 145: { "gatewayports", oGatewayPorts },
146: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 147: { "rhostsauthentication", oDeprecated },
1.17 markus 148: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 149: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
150: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 151: { "rsaauthentication", oRSAAuthentication },
1.50 markus 152: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 153: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 154: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 155: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 156: { "challengeresponseauthentication", oChallengeResponseAuthentication },
157: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
158: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 159: { "kerberosauthentication", oUnsupported },
160: { "kerberostgtpassing", oUnsupported },
161: { "afstokenpassing", oUnsupported },
1.118 markus 162: #if defined(GSSAPI)
163: { "gssapiauthentication", oGssAuthentication },
164: { "gssapidelegatecredentials", oGssDelegateCreds },
165: #else
166: { "gssapiauthentication", oUnsupported },
167: { "gssapidelegatecredentials", oUnsupported },
168: #endif
1.96 markus 169: { "fallbacktorsh", oDeprecated },
170: { "usersh", oDeprecated },
1.17 markus 171: { "identityfile", oIdentityFile },
1.174 stevesk 172: { "identityfile2", oIdentityFile }, /* obsolete */
1.128 markus 173: { "identitiesonly", oIdentitiesOnly },
1.17 markus 174: { "hostname", oHostName },
1.52 markus 175: { "hostkeyalias", oHostKeyAlias },
1.17 markus 176: { "proxycommand", oProxyCommand },
177: { "port", oPort },
178: { "cipher", oCipher },
1.25 markus 179: { "ciphers", oCiphers },
1.62 markus 180: { "macs", oMacs },
1.25 markus 181: { "protocol", oProtocol },
1.17 markus 182: { "remoteforward", oRemoteForward },
183: { "localforward", oLocalForward },
184: { "user", oUser },
185: { "host", oHost },
186: { "escapechar", oEscapeChar },
187: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.174 stevesk 188: { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, /* obsolete */
189: { "userknownhostsfile", oUserKnownHostsFile },
1.81 markus 190: { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
1.17 markus 191: { "connectionattempts", oConnectionAttempts },
192: { "batchmode", oBatchMode },
193: { "checkhostip", oCheckHostIP },
194: { "stricthostkeychecking", oStrictHostKeyChecking },
195: { "compression", oCompression },
196: { "compressionlevel", oCompressionLevel },
1.126 markus 197: { "tcpkeepalive", oTCPKeepAlive },
198: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 199: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
200: { "loglevel", oLogLevel },
1.71 markus 201: { "dynamicforward", oDynamicForward },
1.67 markus 202: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 203: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 204: { "bindaddress", oBindAddress },
1.110 jakob 205: #ifdef SMARTCARD
1.85 jakob 206: { "smartcarddevice", oSmartcardDevice },
1.110 jakob 207: #else
208: { "smartcarddevice", oUnsupported },
209: #endif
1.93 deraadt 210: { "clearallforwardings", oClearAllForwardings },
1.101 markus 211: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 212: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 213: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 214: { "rekeylimit", oRekeyLimit },
1.111 djm 215: { "connecttimeout", oConnectTimeout },
1.112 djm 216: { "addressfamily", oAddressFamily },
1.127 markus 217: { "serveraliveinterval", oServerAliveInterval },
218: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 219: { "sendenv", oSendEnv },
1.132 djm 220: { "controlpath", oControlPath },
221: { "controlmaster", oControlMaster },
1.136 djm 222: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 223: { "tunnel", oTunnel },
224: { "tunneldevice", oTunnelDevice },
225: { "localcommand", oLocalCommand },
226: { "permitlocalcommand", oPermitLocalCommand },
1.167 grunk 227: { "visualhostkey", oVisualHostKey },
1.177 andreas 228: { "useroaming", oUseRoaming },
1.171 djm 229: #ifdef JPAKE
230: { "zeroknowledgepasswordauthentication",
231: oZeroKnowledgePasswordAuthentication },
232: #else
233: { "zeroknowledgepasswordauthentication", oUnsupported },
234: #endif
235:
1.92 stevesk 236: { NULL, oBadOption }
1.13 markus 237: };
238:
1.19 markus 239: /*
240: * Adds a local TCP/IP port forward to options. Never returns if there is an
241: * error.
242: */
1.1 deraadt 243:
1.26 markus 244: void
1.135 djm 245: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 246: {
1.17 markus 247: Forward *fwd;
248: extern uid_t original_real_uid;
1.135 djm 249: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 250: fatal("Privileged ports can only be forwarded by root.");
1.17 markus 251: if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
252: fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
253: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 254:
1.172 stevesk 255: fwd->listen_host = newfwd->listen_host;
1.135 djm 256: fwd->listen_port = newfwd->listen_port;
1.172 stevesk 257: fwd->connect_host = newfwd->connect_host;
1.135 djm 258: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 259: }
260:
1.19 markus 261: /*
262: * Adds a remote TCP/IP port forward to options. Never returns if there is
263: * an error.
264: */
1.1 deraadt 265:
1.26 markus 266: void
1.135 djm 267: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 268: {
1.17 markus 269: Forward *fwd;
270: if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
271: fatal("Too many remote forwards (max %d).",
1.93 deraadt 272: SSH_MAX_FORWARDS_PER_DIRECTION);
1.17 markus 273: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 274:
1.172 stevesk 275: fwd->listen_host = newfwd->listen_host;
1.135 djm 276: fwd->listen_port = newfwd->listen_port;
1.172 stevesk 277: fwd->connect_host = newfwd->connect_host;
1.135 djm 278: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 279: }
280:
1.90 stevesk 281: static void
282: clear_forwardings(Options *options)
283: {
284: int i;
285:
1.135 djm 286: for (i = 0; i < options->num_local_forwards; i++) {
1.138 dtucker 287: if (options->local_forwards[i].listen_host != NULL)
288: xfree(options->local_forwards[i].listen_host);
1.135 djm 289: xfree(options->local_forwards[i].connect_host);
290: }
1.90 stevesk 291: options->num_local_forwards = 0;
1.135 djm 292: for (i = 0; i < options->num_remote_forwards; i++) {
1.138 dtucker 293: if (options->remote_forwards[i].listen_host != NULL)
294: xfree(options->remote_forwards[i].listen_host);
1.135 djm 295: xfree(options->remote_forwards[i].connect_host);
296: }
1.90 stevesk 297: options->num_remote_forwards = 0;
1.145 reyk 298: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 299: }
300:
1.19 markus 301: /*
1.70 stevesk 302: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 303: */
1.1 deraadt 304:
1.26 markus 305: static OpCodes
1.17 markus 306: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 307: {
1.51 markus 308: u_int i;
1.1 deraadt 309:
1.17 markus 310: for (i = 0; keywords[i].name; i++)
1.20 markus 311: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 312: return keywords[i].opcode;
313:
1.75 stevesk 314: error("%s: line %d: Bad configuration option: %s",
315: filename, linenum, cp);
1.17 markus 316: return oBadOption;
1.1 deraadt 317: }
318:
1.19 markus 319: /*
320: * Processes a single option line as used in the configuration files. This
321: * only sets those values that have not already been set.
322: */
1.102 markus 323: #define WHITESPACE " \t\r\n"
1.1 deraadt 324:
1.14 markus 325: int
326: process_config_line(Options *options, const char *host,
1.17 markus 327: char *line, const char *filename, int linenum,
328: int *activep)
1.1 deraadt 329: {
1.135 djm 330: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
1.146 djm 331: int opcode, *intptr, value, value2, scale;
1.164 dtucker 332: LogLevel *log_level_ptr;
1.146 djm 333: long long orig, val64;
1.102 markus 334: size_t len;
1.135 djm 335: Forward fwd;
1.106 djm 336:
337: /* Strip trailing whitespace */
1.139 deraadt 338: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 339: if (strchr(WHITESPACE, line[len]) == NULL)
340: break;
341: line[len] = '\0';
342: }
1.1 deraadt 343:
1.42 provos 344: s = line;
345: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 346: if ((keyword = strdelim(&s)) == NULL)
347: return 0;
1.42 provos 348: /* Ignore leading whitespace. */
349: if (*keyword == '\0')
1.43 markus 350: keyword = strdelim(&s);
1.56 deraadt 351: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 352: return 0;
353:
1.38 provos 354: opcode = parse_token(keyword, filename, linenum);
1.17 markus 355:
356: switch (opcode) {
357: case oBadOption:
1.19 markus 358: /* don't panic, but count bad options */
359: return -1;
1.17 markus 360: /* NOTREACHED */
1.111 djm 361: case oConnectTimeout:
362: intptr = &options->connection_timeout;
1.127 markus 363: parse_time:
1.111 djm 364: arg = strdelim(&s);
365: if (!arg || *arg == '\0')
366: fatal("%s line %d: missing time value.",
367: filename, linenum);
368: if ((value = convtime(arg)) == -1)
369: fatal("%s line %d: invalid time value.",
370: filename, linenum);
1.160 dtucker 371: if (*activep && *intptr == -1)
1.111 djm 372: *intptr = value;
373: break;
374:
1.17 markus 375: case oForwardAgent:
376: intptr = &options->forward_agent;
377: parse_flag:
1.42 provos 378: arg = strdelim(&s);
1.40 ho 379: if (!arg || *arg == '\0')
1.17 markus 380: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
381: value = 0; /* To avoid compiler warning... */
1.38 provos 382: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 383: value = 1;
1.38 provos 384: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 385: value = 0;
386: else
387: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
388: if (*activep && *intptr == -1)
389: *intptr = value;
390: break;
391:
392: case oForwardX11:
393: intptr = &options->forward_x11;
394: goto parse_flag;
395:
1.123 markus 396: case oForwardX11Trusted:
397: intptr = &options->forward_x11_trusted;
398: goto parse_flag;
399:
1.17 markus 400: case oGatewayPorts:
401: intptr = &options->gateway_ports;
402: goto parse_flag;
403:
1.153 markus 404: case oExitOnForwardFailure:
405: intptr = &options->exit_on_forward_failure;
406: goto parse_flag;
407:
1.17 markus 408: case oUsePrivilegedPort:
409: intptr = &options->use_privileged_port;
410: goto parse_flag;
411:
412: case oPasswordAuthentication:
413: intptr = &options->password_authentication;
414: goto parse_flag;
415:
1.171 djm 416: case oZeroKnowledgePasswordAuthentication:
417: intptr = &options->zero_knowledge_password_authentication;
418: goto parse_flag;
419:
1.48 markus 420: case oKbdInteractiveAuthentication:
421: intptr = &options->kbd_interactive_authentication;
422: goto parse_flag;
423:
424: case oKbdInteractiveDevices:
425: charptr = &options->kbd_interactive_devices;
426: goto parse_string;
427:
1.50 markus 428: case oPubkeyAuthentication:
429: intptr = &options->pubkey_authentication;
1.30 markus 430: goto parse_flag;
431:
1.17 markus 432: case oRSAAuthentication:
433: intptr = &options->rsa_authentication;
434: goto parse_flag;
435:
436: case oRhostsRSAAuthentication:
437: intptr = &options->rhosts_rsa_authentication;
438: goto parse_flag;
439:
1.72 markus 440: case oHostbasedAuthentication:
441: intptr = &options->hostbased_authentication;
442: goto parse_flag;
443:
1.59 markus 444: case oChallengeResponseAuthentication:
1.78 markus 445: intptr = &options->challenge_response_authentication;
1.17 markus 446: goto parse_flag;
1.108 jakob 447:
1.118 markus 448: case oGssAuthentication:
449: intptr = &options->gss_authentication;
450: goto parse_flag;
451:
452: case oGssDelegateCreds:
453: intptr = &options->gss_deleg_creds;
454: goto parse_flag;
455:
1.17 markus 456: case oBatchMode:
457: intptr = &options->batch_mode;
458: goto parse_flag;
459:
460: case oCheckHostIP:
461: intptr = &options->check_host_ip;
1.167 grunk 462: goto parse_flag;
1.17 markus 463:
1.107 jakob 464: case oVerifyHostKeyDNS:
465: intptr = &options->verify_host_key_dns;
1.125 jakob 466: goto parse_yesnoask;
1.107 jakob 467:
1.17 markus 468: case oStrictHostKeyChecking:
469: intptr = &options->strict_host_key_checking;
1.125 jakob 470: parse_yesnoask:
1.42 provos 471: arg = strdelim(&s);
1.40 ho 472: if (!arg || *arg == '\0')
1.60 stevesk 473: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 474: filename, linenum);
1.17 markus 475: value = 0; /* To avoid compiler warning... */
1.38 provos 476: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 477: value = 1;
1.38 provos 478: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 479: value = 0;
1.38 provos 480: else if (strcmp(arg, "ask") == 0)
1.17 markus 481: value = 2;
482: else
483: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
484: if (*activep && *intptr == -1)
485: *intptr = value;
486: break;
487:
488: case oCompression:
489: intptr = &options->compression;
490: goto parse_flag;
491:
1.126 markus 492: case oTCPKeepAlive:
493: intptr = &options->tcp_keep_alive;
1.17 markus 494: goto parse_flag;
495:
1.91 markus 496: case oNoHostAuthenticationForLocalhost:
497: intptr = &options->no_host_authentication_for_localhost;
498: goto parse_flag;
499:
1.17 markus 500: case oNumberOfPasswordPrompts:
501: intptr = &options->number_of_password_prompts;
502: goto parse_int;
503:
504: case oCompressionLevel:
505: intptr = &options->compression_level;
506: goto parse_int;
507:
1.105 markus 508: case oRekeyLimit:
509: arg = strdelim(&s);
510: if (!arg || *arg == '\0')
511: fatal("%.200s line %d: Missing argument.", filename, linenum);
512: if (arg[0] < '0' || arg[0] > '9')
513: fatal("%.200s line %d: Bad number.", filename, linenum);
1.146 djm 514: orig = val64 = strtoll(arg, &endofnumber, 10);
1.105 markus 515: if (arg == endofnumber)
516: fatal("%.200s line %d: Bad number.", filename, linenum);
517: switch (toupper(*endofnumber)) {
1.146 djm 518: case '\0':
519: scale = 1;
520: break;
1.105 markus 521: case 'K':
1.146 djm 522: scale = 1<<10;
1.105 markus 523: break;
524: case 'M':
1.146 djm 525: scale = 1<<20;
1.105 markus 526: break;
527: case 'G':
1.146 djm 528: scale = 1<<30;
1.105 markus 529: break;
1.146 djm 530: default:
531: fatal("%.200s line %d: Invalid RekeyLimit suffix",
532: filename, linenum);
1.105 markus 533: }
1.146 djm 534: val64 *= scale;
535: /* detect integer wrap and too-large limits */
1.165 djm 536: if ((val64 / scale) != orig || val64 > UINT_MAX)
1.146 djm 537: fatal("%.200s line %d: RekeyLimit too large",
538: filename, linenum);
539: if (val64 < 16)
540: fatal("%.200s line %d: RekeyLimit too small",
541: filename, linenum);
1.165 djm 542: if (*activep && options->rekey_limit == -1)
543: options->rekey_limit = (u_int32_t)val64;
1.105 markus 544: break;
545:
1.17 markus 546: case oIdentityFile:
1.42 provos 547: arg = strdelim(&s);
1.40 ho 548: if (!arg || *arg == '\0')
1.17 markus 549: fatal("%.200s line %d: Missing argument.", filename, linenum);
550: if (*activep) {
1.50 markus 551: intptr = &options->num_identity_files;
1.27 markus 552: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 553: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 554: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.161 stevesk 555: charptr = &options->identity_files[*intptr];
1.38 provos 556: *charptr = xstrdup(arg);
1.27 markus 557: *intptr = *intptr + 1;
1.17 markus 558: }
559: break;
560:
1.34 markus 561: case oXAuthLocation:
562: charptr=&options->xauth_location;
563: goto parse_string;
564:
1.17 markus 565: case oUser:
566: charptr = &options->user;
567: parse_string:
1.42 provos 568: arg = strdelim(&s);
1.40 ho 569: if (!arg || *arg == '\0')
1.17 markus 570: fatal("%.200s line %d: Missing argument.", filename, linenum);
571: if (*activep && *charptr == NULL)
1.38 provos 572: *charptr = xstrdup(arg);
1.17 markus 573: break;
574:
575: case oGlobalKnownHostsFile:
576: charptr = &options->system_hostfile;
577: goto parse_string;
578:
579: case oUserKnownHostsFile:
580: charptr = &options->user_hostfile;
581: goto parse_string;
582:
1.27 markus 583: case oGlobalKnownHostsFile2:
584: charptr = &options->system_hostfile2;
585: goto parse_string;
586:
587: case oUserKnownHostsFile2:
588: charptr = &options->user_hostfile2;
589: goto parse_string;
590:
1.17 markus 591: case oHostName:
592: charptr = &options->hostname;
593: goto parse_string;
594:
1.52 markus 595: case oHostKeyAlias:
596: charptr = &options->host_key_alias;
597: goto parse_string;
598:
1.67 markus 599: case oPreferredAuthentications:
600: charptr = &options->preferred_authentications;
601: goto parse_string;
602:
1.77 markus 603: case oBindAddress:
604: charptr = &options->bind_address;
605: goto parse_string;
606:
1.85 jakob 607: case oSmartcardDevice:
1.86 markus 608: charptr = &options->smartcard_device;
609: goto parse_string;
1.85 jakob 610:
1.17 markus 611: case oProxyCommand:
1.144 reyk 612: charptr = &options->proxy_command;
613: parse_command:
1.113 markus 614: if (s == NULL)
615: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 616: len = strspn(s, WHITESPACE "=");
1.17 markus 617: if (*activep && *charptr == NULL)
1.102 markus 618: *charptr = xstrdup(s + len);
1.17 markus 619: return 0;
620:
621: case oPort:
622: intptr = &options->port;
623: parse_int:
1.42 provos 624: arg = strdelim(&s);
1.40 ho 625: if (!arg || *arg == '\0')
1.17 markus 626: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 627: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 628: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 629:
630: /* Octal, decimal, or hex format? */
1.38 provos 631: value = strtol(arg, &endofnumber, 0);
632: if (arg == endofnumber)
1.21 markus 633: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 634: if (*activep && *intptr == -1)
635: *intptr = value;
636: break;
637:
638: case oConnectionAttempts:
639: intptr = &options->connection_attempts;
640: goto parse_int;
641:
642: case oCipher:
643: intptr = &options->cipher;
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: value = cipher_number(arg);
1.17 markus 648: if (value == -1)
649: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 650: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 651: if (*activep && *intptr == -1)
652: *intptr = value;
653: break;
654:
1.25 markus 655: case oCiphers:
1.42 provos 656: arg = strdelim(&s);
1.40 ho 657: if (!arg || *arg == '\0')
1.32 markus 658: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 659: if (!ciphers_valid(arg))
1.31 markus 660: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 661: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 662: if (*activep && options->ciphers == NULL)
1.38 provos 663: options->ciphers = xstrdup(arg);
1.25 markus 664: break;
665:
1.62 markus 666: case oMacs:
667: arg = strdelim(&s);
668: if (!arg || *arg == '\0')
669: fatal("%.200s line %d: Missing argument.", filename, linenum);
670: if (!mac_valid(arg))
671: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 672: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 673: if (*activep && options->macs == NULL)
674: options->macs = xstrdup(arg);
675: break;
676:
1.76 markus 677: case oHostKeyAlgorithms:
678: arg = strdelim(&s);
679: if (!arg || *arg == '\0')
680: fatal("%.200s line %d: Missing argument.", filename, linenum);
681: if (!key_names_valid2(arg))
682: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 683: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 684: if (*activep && options->hostkeyalgorithms == NULL)
685: options->hostkeyalgorithms = xstrdup(arg);
686: break;
687:
1.25 markus 688: case oProtocol:
689: intptr = &options->protocol;
1.42 provos 690: arg = strdelim(&s);
1.40 ho 691: if (!arg || *arg == '\0')
1.32 markus 692: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 693: value = proto_spec(arg);
1.25 markus 694: if (value == SSH_PROTO_UNKNOWN)
695: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 696: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 697: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
698: *intptr = value;
699: break;
700:
1.17 markus 701: case oLogLevel:
1.164 dtucker 702: log_level_ptr = &options->log_level;
1.42 provos 703: arg = strdelim(&s);
1.38 provos 704: value = log_level_number(arg);
1.95 markus 705: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 706: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 707: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 708: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
709: *log_level_ptr = (LogLevel) value;
1.17 markus 710: break;
711:
1.88 stevesk 712: case oLocalForward:
1.17 markus 713: case oRemoteForward:
1.168 stevesk 714: case oDynamicForward:
1.42 provos 715: arg = strdelim(&s);
1.135 djm 716: if (arg == NULL || *arg == '\0')
1.88 stevesk 717: fatal("%.200s line %d: Missing port argument.",
718: filename, linenum);
1.135 djm 719:
1.168 stevesk 720: if (opcode == oLocalForward ||
721: opcode == oRemoteForward) {
722: arg2 = strdelim(&s);
723: if (arg2 == NULL || *arg2 == '\0')
724: fatal("%.200s line %d: Missing target argument.",
725: filename, linenum);
1.135 djm 726:
1.168 stevesk 727: /* construct a string for parse_forward */
728: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
729: } else if (opcode == oDynamicForward) {
730: strlcpy(fwdarg, arg, sizeof(fwdarg));
731: }
732:
733: if (parse_forward(&fwd, fwdarg,
1.176 djm 734: opcode == oDynamicForward ? 1 : 0,
735: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 736: fatal("%.200s line %d: Bad forwarding specification.",
737: filename, linenum);
1.135 djm 738:
1.88 stevesk 739: if (*activep) {
1.168 stevesk 740: if (opcode == oLocalForward ||
741: opcode == oDynamicForward)
1.135 djm 742: add_local_forward(options, &fwd);
1.88 stevesk 743: else if (opcode == oRemoteForward)
1.135 djm 744: add_remote_forward(options, &fwd);
1.88 stevesk 745: }
1.17 markus 746: break;
1.71 markus 747:
1.90 stevesk 748: case oClearAllForwardings:
749: intptr = &options->clear_forwardings;
750: goto parse_flag;
751:
1.17 markus 752: case oHost:
753: *activep = 0;
1.42 provos 754: while ((arg = strdelim(&s)) != NULL && *arg != '\0')
1.38 provos 755: if (match_pattern(host, arg)) {
756: debug("Applying options for %.100s", arg);
1.17 markus 757: *activep = 1;
758: break;
759: }
1.42 provos 760: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 761: return 0;
762:
763: case oEscapeChar:
764: intptr = &options->escape_char;
1.42 provos 765: arg = strdelim(&s);
1.40 ho 766: if (!arg || *arg == '\0')
1.17 markus 767: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 768: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 769: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
770: value = (u_char) arg[1] & 31;
1.38 provos 771: else if (strlen(arg) == 1)
1.51 markus 772: value = (u_char) arg[0];
1.38 provos 773: else if (strcmp(arg, "none") == 0)
1.79 stevesk 774: value = SSH_ESCAPECHAR_NONE;
1.17 markus 775: else {
776: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 777: filename, linenum);
1.17 markus 778: /* NOTREACHED */
779: value = 0; /* Avoid compiler warning. */
780: }
781: if (*activep && *intptr == -1)
782: *intptr = value;
1.112 djm 783: break;
784:
785: case oAddressFamily:
786: arg = strdelim(&s);
1.140 markus 787: if (!arg || *arg == '\0')
788: fatal("%s line %d: missing address family.",
789: filename, linenum);
1.114 djm 790: intptr = &options->address_family;
1.112 djm 791: if (strcasecmp(arg, "inet") == 0)
1.114 djm 792: value = AF_INET;
1.112 djm 793: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 794: value = AF_INET6;
1.112 djm 795: else if (strcasecmp(arg, "any") == 0)
1.114 djm 796: value = AF_UNSPEC;
1.112 djm 797: else
798: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 799: if (*activep && *intptr == -1)
800: *intptr = value;
1.17 markus 801: break;
802:
1.101 markus 803: case oEnableSSHKeysign:
804: intptr = &options->enable_ssh_keysign;
805: goto parse_flag;
806:
1.128 markus 807: case oIdentitiesOnly:
808: intptr = &options->identities_only;
809: goto parse_flag;
810:
1.127 markus 811: case oServerAliveInterval:
812: intptr = &options->server_alive_interval;
813: goto parse_time;
814:
815: case oServerAliveCountMax:
816: intptr = &options->server_alive_count_max;
817: goto parse_int;
818:
1.130 djm 819: case oSendEnv:
820: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
821: if (strchr(arg, '=') != NULL)
822: fatal("%s line %d: Invalid environment name.",
823: filename, linenum);
1.137 djm 824: if (!*activep)
825: continue;
1.130 djm 826: if (options->num_send_env >= MAX_SEND_ENV)
827: fatal("%s line %d: too many send env.",
828: filename, linenum);
829: options->send_env[options->num_send_env++] =
830: xstrdup(arg);
831: }
832: break;
833:
1.132 djm 834: case oControlPath:
835: charptr = &options->control_path;
836: goto parse_string;
837:
838: case oControlMaster:
839: intptr = &options->control_master;
1.141 djm 840: arg = strdelim(&s);
841: if (!arg || *arg == '\0')
842: fatal("%.200s line %d: Missing ControlMaster argument.",
843: filename, linenum);
844: value = 0; /* To avoid compiler warning... */
845: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
846: value = SSHCTL_MASTER_YES;
847: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
848: value = SSHCTL_MASTER_NO;
849: else if (strcmp(arg, "auto") == 0)
850: value = SSHCTL_MASTER_AUTO;
851: else if (strcmp(arg, "ask") == 0)
852: value = SSHCTL_MASTER_ASK;
853: else if (strcmp(arg, "autoask") == 0)
854: value = SSHCTL_MASTER_AUTO_ASK;
855: else
856: fatal("%.200s line %d: Bad ControlMaster argument.",
857: filename, linenum);
858: if (*activep && *intptr == -1)
859: *intptr = value;
860: break;
1.132 djm 861:
1.136 djm 862: case oHashKnownHosts:
863: intptr = &options->hash_known_hosts;
864: goto parse_flag;
865:
1.144 reyk 866: case oTunnel:
867: intptr = &options->tun_open;
1.145 reyk 868: arg = strdelim(&s);
869: if (!arg || *arg == '\0')
870: fatal("%s line %d: Missing yes/point-to-point/"
871: "ethernet/no argument.", filename, linenum);
872: value = 0; /* silence compiler */
873: if (strcasecmp(arg, "ethernet") == 0)
874: value = SSH_TUNMODE_ETHERNET;
875: else if (strcasecmp(arg, "point-to-point") == 0)
876: value = SSH_TUNMODE_POINTOPOINT;
877: else if (strcasecmp(arg, "yes") == 0)
878: value = SSH_TUNMODE_DEFAULT;
879: else if (strcasecmp(arg, "no") == 0)
880: value = SSH_TUNMODE_NO;
881: else
882: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
883: "no argument: %s", filename, linenum, arg);
884: if (*activep)
885: *intptr = value;
886: break;
1.144 reyk 887:
888: case oTunnelDevice:
889: arg = strdelim(&s);
890: if (!arg || *arg == '\0')
891: fatal("%.200s line %d: Missing argument.", filename, linenum);
892: value = a2tun(arg, &value2);
1.145 reyk 893: if (value == SSH_TUNID_ERR)
1.144 reyk 894: fatal("%.200s line %d: Bad tun device.", filename, linenum);
895: if (*activep) {
896: options->tun_local = value;
897: options->tun_remote = value2;
898: }
899: break;
900:
901: case oLocalCommand:
902: charptr = &options->local_command;
903: goto parse_command;
904:
905: case oPermitLocalCommand:
906: intptr = &options->permit_local_command;
907: goto parse_flag;
908:
1.167 grunk 909: case oVisualHostKey:
910: intptr = &options->visual_host_key;
911: goto parse_flag;
912:
1.177 andreas 913: case oUseRoaming:
914: intptr = &options->use_roaming;
915: goto parse_flag;
916:
1.96 markus 917: case oDeprecated:
1.98 markus 918: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 919: filename, linenum, keyword);
1.98 markus 920: return 0;
1.96 markus 921:
1.110 jakob 922: case oUnsupported:
923: error("%s line %d: Unsupported option \"%s\"",
924: filename, linenum, keyword);
925: return 0;
926:
1.17 markus 927: default:
928: fatal("process_config_line: Unimplemented opcode %d", opcode);
929: }
930:
931: /* Check that there is no garbage at end of line. */
1.57 djm 932: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 933: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 934: filename, linenum, arg);
1.39 ho 935: }
1.17 markus 936: return 0;
1.1 deraadt 937: }
938:
939:
1.19 markus 940: /*
941: * Reads the config file and modifies the options accordingly. Options
942: * should already be initialized before this call. This never returns if
1.89 stevesk 943: * there is an error. If the file does not exist, this returns 0.
1.19 markus 944: */
1.1 deraadt 945:
1.89 stevesk 946: int
1.134 deraadt 947: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 948: int checkperm)
1.1 deraadt 949: {
1.17 markus 950: FILE *f;
951: char line[1024];
952: int active, linenum;
953: int bad_options = 0;
954:
1.129 djm 955: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 956: return 0;
1.129 djm 957:
958: if (checkperm) {
959: struct stat sb;
1.134 deraadt 960:
1.131 dtucker 961: if (fstat(fileno(f), &sb) == -1)
1.129 djm 962: fatal("fstat %s: %s", filename, strerror(errno));
963: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 964: (sb.st_mode & 022) != 0))
1.129 djm 965: fatal("Bad owner or permissions on %s", filename);
966: }
1.17 markus 967:
968: debug("Reading configuration data %.200s", filename);
969:
1.19 markus 970: /*
971: * Mark that we are now processing the options. This flag is turned
972: * on/off by Host specifications.
973: */
1.17 markus 974: active = 1;
975: linenum = 0;
976: while (fgets(line, sizeof(line), f)) {
977: /* Update line number counter. */
978: linenum++;
979: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
980: bad_options++;
981: }
982: fclose(f);
983: if (bad_options > 0)
1.64 millert 984: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 985: filename, bad_options);
1.89 stevesk 986: return 1;
1.1 deraadt 987: }
988:
1.19 markus 989: /*
990: * Initializes options to special values that indicate that they have not yet
991: * been set. Read_config_file will only set options with this value. Options
992: * are processed in the following order: command line, user config file,
993: * system config file. Last, fill_default_options is called.
994: */
1.1 deraadt 995:
1.26 markus 996: void
1.17 markus 997: initialize_options(Options * options)
1.1 deraadt 998: {
1.17 markus 999: memset(options, 'X', sizeof(*options));
1000: options->forward_agent = -1;
1001: options->forward_x11 = -1;
1.123 markus 1002: options->forward_x11_trusted = -1;
1.153 markus 1003: options->exit_on_forward_failure = -1;
1.34 markus 1004: options->xauth_location = NULL;
1.17 markus 1005: options->gateway_ports = -1;
1006: options->use_privileged_port = -1;
1007: options->rsa_authentication = -1;
1.50 markus 1008: options->pubkey_authentication = -1;
1.78 markus 1009: options->challenge_response_authentication = -1;
1.118 markus 1010: options->gss_authentication = -1;
1011: options->gss_deleg_creds = -1;
1.17 markus 1012: options->password_authentication = -1;
1.48 markus 1013: options->kbd_interactive_authentication = -1;
1014: options->kbd_interactive_devices = NULL;
1.17 markus 1015: options->rhosts_rsa_authentication = -1;
1.72 markus 1016: options->hostbased_authentication = -1;
1.17 markus 1017: options->batch_mode = -1;
1018: options->check_host_ip = -1;
1019: options->strict_host_key_checking = -1;
1020: options->compression = -1;
1.126 markus 1021: options->tcp_keep_alive = -1;
1.17 markus 1022: options->compression_level = -1;
1023: options->port = -1;
1.114 djm 1024: options->address_family = -1;
1.17 markus 1025: options->connection_attempts = -1;
1.111 djm 1026: options->connection_timeout = -1;
1.17 markus 1027: options->number_of_password_prompts = -1;
1028: options->cipher = -1;
1.25 markus 1029: options->ciphers = NULL;
1.62 markus 1030: options->macs = NULL;
1.76 markus 1031: options->hostkeyalgorithms = NULL;
1.25 markus 1032: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1033: options->num_identity_files = 0;
1034: options->hostname = NULL;
1.52 markus 1035: options->host_key_alias = NULL;
1.17 markus 1036: options->proxy_command = NULL;
1037: options->user = NULL;
1038: options->escape_char = -1;
1039: options->system_hostfile = NULL;
1040: options->user_hostfile = NULL;
1.27 markus 1041: options->system_hostfile2 = NULL;
1042: options->user_hostfile2 = NULL;
1.17 markus 1043: options->num_local_forwards = 0;
1044: options->num_remote_forwards = 0;
1.90 stevesk 1045: options->clear_forwardings = -1;
1.95 markus 1046: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1047: options->preferred_authentications = NULL;
1.77 markus 1048: options->bind_address = NULL;
1.86 markus 1049: options->smartcard_device = NULL;
1.101 markus 1050: options->enable_ssh_keysign = - 1;
1.91 markus 1051: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1052: options->identities_only = - 1;
1.105 markus 1053: options->rekey_limit = - 1;
1.107 jakob 1054: options->verify_host_key_dns = -1;
1.127 markus 1055: options->server_alive_interval = -1;
1056: options->server_alive_count_max = -1;
1.130 djm 1057: options->num_send_env = 0;
1.132 djm 1058: options->control_path = NULL;
1059: options->control_master = -1;
1.136 djm 1060: options->hash_known_hosts = -1;
1.144 reyk 1061: options->tun_open = -1;
1062: options->tun_local = -1;
1063: options->tun_remote = -1;
1064: options->local_command = NULL;
1065: options->permit_local_command = -1;
1.177 andreas 1066: options->use_roaming = -1;
1.167 grunk 1067: options->visual_host_key = -1;
1.171 djm 1068: options->zero_knowledge_password_authentication = -1;
1.1 deraadt 1069: }
1070:
1.19 markus 1071: /*
1072: * Called after processing other sources of option data, this fills those
1073: * options for which no value has been specified with their default values.
1074: */
1.1 deraadt 1075:
1.26 markus 1076: void
1.17 markus 1077: fill_default_options(Options * options)
1.1 deraadt 1078: {
1.61 deraadt 1079: int len;
1080:
1.17 markus 1081: if (options->forward_agent == -1)
1.33 markus 1082: options->forward_agent = 0;
1.17 markus 1083: if (options->forward_x11 == -1)
1.23 markus 1084: options->forward_x11 = 0;
1.123 markus 1085: if (options->forward_x11_trusted == -1)
1086: options->forward_x11_trusted = 0;
1.153 markus 1087: if (options->exit_on_forward_failure == -1)
1088: options->exit_on_forward_failure = 0;
1.34 markus 1089: if (options->xauth_location == NULL)
1.80 markus 1090: options->xauth_location = _PATH_XAUTH;
1.17 markus 1091: if (options->gateway_ports == -1)
1092: options->gateway_ports = 0;
1093: if (options->use_privileged_port == -1)
1.65 markus 1094: options->use_privileged_port = 0;
1.17 markus 1095: if (options->rsa_authentication == -1)
1096: options->rsa_authentication = 1;
1.50 markus 1097: if (options->pubkey_authentication == -1)
1098: options->pubkey_authentication = 1;
1.78 markus 1099: if (options->challenge_response_authentication == -1)
1.83 markus 1100: options->challenge_response_authentication = 1;
1.118 markus 1101: if (options->gss_authentication == -1)
1.122 markus 1102: options->gss_authentication = 0;
1.118 markus 1103: if (options->gss_deleg_creds == -1)
1104: options->gss_deleg_creds = 0;
1.17 markus 1105: if (options->password_authentication == -1)
1106: options->password_authentication = 1;
1.48 markus 1107: if (options->kbd_interactive_authentication == -1)
1.59 markus 1108: options->kbd_interactive_authentication = 1;
1.17 markus 1109: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1110: options->rhosts_rsa_authentication = 0;
1.72 markus 1111: if (options->hostbased_authentication == -1)
1112: options->hostbased_authentication = 0;
1.17 markus 1113: if (options->batch_mode == -1)
1114: options->batch_mode = 0;
1115: if (options->check_host_ip == -1)
1116: options->check_host_ip = 1;
1117: if (options->strict_host_key_checking == -1)
1118: options->strict_host_key_checking = 2; /* 2 is default */
1119: if (options->compression == -1)
1120: options->compression = 0;
1.126 markus 1121: if (options->tcp_keep_alive == -1)
1122: options->tcp_keep_alive = 1;
1.17 markus 1123: if (options->compression_level == -1)
1124: options->compression_level = 6;
1125: if (options->port == -1)
1126: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1127: if (options->address_family == -1)
1128: options->address_family = AF_UNSPEC;
1.17 markus 1129: if (options->connection_attempts == -1)
1.84 markus 1130: options->connection_attempts = 1;
1.17 markus 1131: if (options->number_of_password_prompts == -1)
1132: options->number_of_password_prompts = 3;
1133: /* Selected in ssh_login(). */
1134: if (options->cipher == -1)
1135: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1136: /* options->ciphers, default set in myproposals.h */
1.62 markus 1137: /* options->macs, default set in myproposals.h */
1.76 markus 1138: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1139: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1140: options->protocol = SSH_PROTO_2;
1.17 markus 1141: if (options->num_identity_files == 0) {
1.50 markus 1142: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1143: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1144: options->identity_files[options->num_identity_files] =
1.61 deraadt 1145: xmalloc(len);
1146: snprintf(options->identity_files[options->num_identity_files++],
1147: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1148: }
1149: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1150: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1151: options->identity_files[options->num_identity_files] =
1152: xmalloc(len);
1153: snprintf(options->identity_files[options->num_identity_files++],
1154: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1155:
1.61 deraadt 1156: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1157: options->identity_files[options->num_identity_files] =
1.61 deraadt 1158: xmalloc(len);
1159: snprintf(options->identity_files[options->num_identity_files++],
1160: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.50 markus 1161: }
1.27 markus 1162: }
1.17 markus 1163: if (options->escape_char == -1)
1164: options->escape_char = '~';
1165: if (options->system_hostfile == NULL)
1.55 markus 1166: options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
1.17 markus 1167: if (options->user_hostfile == NULL)
1.55 markus 1168: options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
1.27 markus 1169: if (options->system_hostfile2 == NULL)
1.55 markus 1170: options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
1.27 markus 1171: if (options->user_hostfile2 == NULL)
1.55 markus 1172: options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
1.95 markus 1173: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1174: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1175: if (options->clear_forwardings == 1)
1176: clear_forwardings(options);
1.91 markus 1177: if (options->no_host_authentication_for_localhost == - 1)
1178: options->no_host_authentication_for_localhost = 0;
1.128 markus 1179: if (options->identities_only == -1)
1180: options->identities_only = 0;
1.101 markus 1181: if (options->enable_ssh_keysign == -1)
1182: options->enable_ssh_keysign = 0;
1.105 markus 1183: if (options->rekey_limit == -1)
1184: options->rekey_limit = 0;
1.107 jakob 1185: if (options->verify_host_key_dns == -1)
1186: options->verify_host_key_dns = 0;
1.127 markus 1187: if (options->server_alive_interval == -1)
1188: options->server_alive_interval = 0;
1189: if (options->server_alive_count_max == -1)
1190: options->server_alive_count_max = 3;
1.132 djm 1191: if (options->control_master == -1)
1192: options->control_master = 0;
1.136 djm 1193: if (options->hash_known_hosts == -1)
1194: options->hash_known_hosts = 0;
1.144 reyk 1195: if (options->tun_open == -1)
1.145 reyk 1196: options->tun_open = SSH_TUNMODE_NO;
1197: if (options->tun_local == -1)
1198: options->tun_local = SSH_TUNID_ANY;
1199: if (options->tun_remote == -1)
1200: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1201: if (options->permit_local_command == -1)
1202: options->permit_local_command = 0;
1.177 andreas 1203: if (options->use_roaming == -1)
1204: options->use_roaming = 1;
1.167 grunk 1205: if (options->visual_host_key == -1)
1206: options->visual_host_key = 0;
1.171 djm 1207: if (options->zero_knowledge_password_authentication == -1)
1208: options->zero_knowledge_password_authentication = 0;
1.144 reyk 1209: /* options->local_command should not be set by default */
1.17 markus 1210: /* options->proxy_command should not be set by default */
1211: /* options->user will be set in the main program if appropriate */
1212: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1213: /* options->host_key_alias should not be set by default */
1.67 markus 1214: /* options->preferred_authentications will be set in ssh */
1.135 djm 1215: }
1216:
1217: /*
1218: * parse_forward
1219: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 1220: * dynamicfwd == 0
1.135 djm 1221: * [listenhost:]listenport:connecthost:connectport
1.168 stevesk 1222: * dynamicfwd == 1
1223: * [listenhost:]listenport
1.135 djm 1224: * returns number of arguments parsed or zero on error
1225: */
1226: int
1.176 djm 1227: parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 1228: {
1229: int i;
1230: char *p, *cp, *fwdarg[4];
1231:
1232: memset(fwd, '\0', sizeof(*fwd));
1233:
1234: cp = p = xstrdup(fwdspec);
1235:
1236: /* skip leading spaces */
1.162 tedu 1237: while (isspace(*cp))
1.135 djm 1238: cp++;
1239:
1240: for (i = 0; i < 4; ++i)
1241: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1242: break;
1243:
1.170 stevesk 1244: /* Check for trailing garbage */
1.135 djm 1245: if (cp != NULL)
1246: i = 0; /* failure */
1247:
1248: switch (i) {
1.168 stevesk 1249: case 1:
1250: fwd->listen_host = NULL;
1251: fwd->listen_port = a2port(fwdarg[0]);
1252: fwd->connect_host = xstrdup("socks");
1253: break;
1254:
1255: case 2:
1256: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1257: fwd->listen_port = a2port(fwdarg[1]);
1258: fwd->connect_host = xstrdup("socks");
1259: break;
1260:
1.135 djm 1261: case 3:
1262: fwd->listen_host = NULL;
1263: fwd->listen_port = a2port(fwdarg[0]);
1264: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1265: fwd->connect_port = a2port(fwdarg[2]);
1266: break;
1267:
1268: case 4:
1269: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1270: fwd->listen_port = a2port(fwdarg[1]);
1271: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1272: fwd->connect_port = a2port(fwdarg[3]);
1273: break;
1274: default:
1275: i = 0; /* failure */
1276: }
1277:
1278: xfree(p);
1279:
1.168 stevesk 1280: if (dynamicfwd) {
1281: if (!(i == 1 || i == 2))
1282: goto fail_free;
1283: } else {
1284: if (!(i == 3 || i == 4))
1285: goto fail_free;
1.175 djm 1286: if (fwd->connect_port <= 0)
1.168 stevesk 1287: goto fail_free;
1288: }
1289:
1.176 djm 1290: if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0))
1.135 djm 1291: goto fail_free;
1292:
1293: if (fwd->connect_host != NULL &&
1294: strlen(fwd->connect_host) >= NI_MAXHOST)
1295: goto fail_free;
1.176 djm 1296: if (fwd->listen_host != NULL &&
1297: strlen(fwd->listen_host) >= NI_MAXHOST)
1298: goto fail_free;
1299:
1.135 djm 1300:
1301: return (i);
1302:
1303: fail_free:
1.173 djm 1304: if (fwd->connect_host != NULL) {
1.135 djm 1305: xfree(fwd->connect_host);
1.173 djm 1306: fwd->connect_host = NULL;
1307: }
1308: if (fwd->listen_host != NULL) {
1.135 djm 1309: xfree(fwd->listen_host);
1.173 djm 1310: fwd->listen_host = NULL;
1311: }
1.135 djm 1312: return (0);
1.1 deraadt 1313: }
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