Annotation of src/usr.bin/ssh/readconf.c, Revision 1.191
1.191 ! djm 1: /* $OpenBSD: readconf.c,v 1.190 2010/11/13 23:27:50 djm Exp $ */
1.1 deraadt 2: /*
1.18 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Functions for reading the configuration files.
1.26 markus 7: *
1.46 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 13: */
1.1 deraadt 14:
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>
1.190 djm 20: #include <netinet/in_systm.h>
21: #include <netinet/ip.h>
1.148 stevesk 22:
23: #include <ctype.h>
1.154 stevesk 24: #include <errno.h>
1.155 stevesk 25: #include <netdb.h>
1.159 deraadt 26: #include <signal.h>
1.158 stevesk 27: #include <stdio.h>
1.157 stevesk 28: #include <string.h>
1.156 stevesk 29: #include <unistd.h>
1.1 deraadt 30:
1.159 deraadt 31: #include "xmalloc.h"
1.1 deraadt 32: #include "ssh.h"
1.25 markus 33: #include "compat.h"
1.58 markus 34: #include "cipher.h"
1.55 markus 35: #include "pathnames.h"
1.58 markus 36: #include "log.h"
1.159 deraadt 37: #include "key.h"
1.58 markus 38: #include "readconf.h"
39: #include "match.h"
40: #include "misc.h"
1.159 deraadt 41: #include "buffer.h"
1.62 markus 42: #include "kex.h"
43: #include "mac.h"
1.1 deraadt 44:
45: /* Format of the configuration file:
46:
47: # Configuration data is parsed as follows:
48: # 1. command line options
49: # 2. user-specific file
50: # 3. system-wide file
51: # Any configuration value is only changed the first time it is set.
52: # Thus, host-specific definitions should be at the beginning of the
53: # configuration file, and defaults at the end.
54:
55: # Host-specific declarations. These may override anything above. A single
56: # host may match multiple declarations; these are processed in the order
57: # that they are given in.
58:
59: Host *.ngs.fi ngs.fi
1.96 markus 60: User foo
1.1 deraadt 61:
62: Host fake.com
63: HostName another.host.name.real.org
64: User blaah
65: Port 34289
66: ForwardX11 no
67: ForwardAgent no
68:
69: Host books.com
70: RemoteForward 9999 shadows.cs.hut.fi:9999
71: Cipher 3des
72:
73: Host fascist.blob.com
74: Port 23123
75: User tylonen
76: PasswordAuthentication no
77:
78: Host puukko.hut.fi
79: User t35124p
80: ProxyCommand ssh-proxy %h %p
81:
82: Host *.fr
1.96 markus 83: PublicKeyAuthentication no
1.1 deraadt 84:
85: Host *.su
86: Cipher none
87: PasswordAuthentication no
88:
1.144 reyk 89: Host vpn.fake.com
90: Tunnel yes
91: TunnelDevice 3
92:
1.1 deraadt 93: # Defaults for various options
94: Host *
95: ForwardAgent no
1.50 markus 96: ForwardX11 no
1.1 deraadt 97: PasswordAuthentication yes
98: RSAAuthentication yes
99: RhostsRSAAuthentication yes
100: StrictHostKeyChecking yes
1.126 markus 101: TcpKeepAlive no
1.1 deraadt 102: IdentityFile ~/.ssh/identity
103: Port 22
104: EscapeChar ~
105:
106: */
107:
108: /* Keyword tokens. */
109:
1.17 markus 110: typedef enum {
111: oBadOption,
1.186 djm 112: oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
113: oGatewayPorts, oExitOnForwardFailure,
1.100 deraadt 114: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 115: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 116: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
117: oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
118: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
119: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 120: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 121: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 122: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 123: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 124: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.183 markus 125: oHostKeyAlgorithms, oBindAddress, oPKCS11Provider,
1.96 markus 126: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 127: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 128: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 129: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.187 djm 130: oSendEnv, oControlPath, oControlMaster, oControlPersist,
131: oHashKnownHosts,
1.144 reyk 132: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.182 dtucker 133: oVisualHostKey, oUseRoaming, oZeroKnowledgePasswordAuthentication,
1.190 djm 134: oKexAlgorithms, oIPQoS,
1.182 dtucker 135: oDeprecated, oUnsupported
1.1 deraadt 136: } OpCodes;
137:
138: /* Textual representations of the tokens. */
139:
1.17 markus 140: static struct {
141: const char *name;
142: OpCodes opcode;
143: } keywords[] = {
144: { "forwardagent", oForwardAgent },
145: { "forwardx11", oForwardX11 },
1.123 markus 146: { "forwardx11trusted", oForwardX11Trusted },
1.186 djm 147: { "forwardx11timeout", oForwardX11Timeout },
1.153 markus 148: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 149: { "xauthlocation", oXAuthLocation },
1.17 markus 150: { "gatewayports", oGatewayPorts },
151: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 152: { "rhostsauthentication", oDeprecated },
1.17 markus 153: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 154: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
155: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 156: { "rsaauthentication", oRSAAuthentication },
1.50 markus 157: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 158: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 159: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 160: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 161: { "challengeresponseauthentication", oChallengeResponseAuthentication },
162: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
163: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 164: { "kerberosauthentication", oUnsupported },
165: { "kerberostgtpassing", oUnsupported },
166: { "afstokenpassing", oUnsupported },
1.118 markus 167: #if defined(GSSAPI)
168: { "gssapiauthentication", oGssAuthentication },
169: { "gssapidelegatecredentials", oGssDelegateCreds },
170: #else
171: { "gssapiauthentication", oUnsupported },
172: { "gssapidelegatecredentials", oUnsupported },
173: #endif
1.96 markus 174: { "fallbacktorsh", oDeprecated },
175: { "usersh", oDeprecated },
1.17 markus 176: { "identityfile", oIdentityFile },
1.174 stevesk 177: { "identityfile2", oIdentityFile }, /* obsolete */
1.128 markus 178: { "identitiesonly", oIdentitiesOnly },
1.17 markus 179: { "hostname", oHostName },
1.52 markus 180: { "hostkeyalias", oHostKeyAlias },
1.17 markus 181: { "proxycommand", oProxyCommand },
182: { "port", oPort },
183: { "cipher", oCipher },
1.25 markus 184: { "ciphers", oCiphers },
1.62 markus 185: { "macs", oMacs },
1.25 markus 186: { "protocol", oProtocol },
1.17 markus 187: { "remoteforward", oRemoteForward },
188: { "localforward", oLocalForward },
189: { "user", oUser },
190: { "host", oHost },
191: { "escapechar", oEscapeChar },
192: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.174 stevesk 193: { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, /* obsolete */
194: { "userknownhostsfile", oUserKnownHostsFile },
1.81 markus 195: { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
1.17 markus 196: { "connectionattempts", oConnectionAttempts },
197: { "batchmode", oBatchMode },
198: { "checkhostip", oCheckHostIP },
199: { "stricthostkeychecking", oStrictHostKeyChecking },
200: { "compression", oCompression },
201: { "compressionlevel", oCompressionLevel },
1.126 markus 202: { "tcpkeepalive", oTCPKeepAlive },
203: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 204: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
205: { "loglevel", oLogLevel },
1.71 markus 206: { "dynamicforward", oDynamicForward },
1.67 markus 207: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 208: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 209: { "bindaddress", oBindAddress },
1.183 markus 210: #ifdef ENABLE_PKCS11
211: { "smartcarddevice", oPKCS11Provider },
212: { "pkcs11provider", oPKCS11Provider },
1.110 jakob 213: #else
214: { "smartcarddevice", oUnsupported },
1.183 markus 215: { "pkcs11provider", oUnsupported },
1.110 jakob 216: #endif
1.93 deraadt 217: { "clearallforwardings", oClearAllForwardings },
1.101 markus 218: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 219: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 220: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 221: { "rekeylimit", oRekeyLimit },
1.111 djm 222: { "connecttimeout", oConnectTimeout },
1.112 djm 223: { "addressfamily", oAddressFamily },
1.127 markus 224: { "serveraliveinterval", oServerAliveInterval },
225: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 226: { "sendenv", oSendEnv },
1.132 djm 227: { "controlpath", oControlPath },
228: { "controlmaster", oControlMaster },
1.187 djm 229: { "controlpersist", oControlPersist },
1.136 djm 230: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 231: { "tunnel", oTunnel },
232: { "tunneldevice", oTunnelDevice },
233: { "localcommand", oLocalCommand },
234: { "permitlocalcommand", oPermitLocalCommand },
1.167 grunk 235: { "visualhostkey", oVisualHostKey },
1.177 andreas 236: { "useroaming", oUseRoaming },
1.171 djm 237: #ifdef JPAKE
238: { "zeroknowledgepasswordauthentication",
239: oZeroKnowledgePasswordAuthentication },
240: #else
241: { "zeroknowledgepasswordauthentication", oUnsupported },
242: #endif
1.189 djm 243: { "kexalgorithms", oKexAlgorithms },
1.190 djm 244: { "ipqos", oIPQoS },
1.171 djm 245:
1.92 stevesk 246: { NULL, oBadOption }
1.13 markus 247: };
248:
1.19 markus 249: /*
250: * Adds a local TCP/IP port forward to options. Never returns if there is an
251: * error.
252: */
1.1 deraadt 253:
1.26 markus 254: void
1.135 djm 255: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 256: {
1.17 markus 257: Forward *fwd;
258: extern uid_t original_real_uid;
1.185 djm 259:
1.135 djm 260: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 261: fatal("Privileged ports can only be forwarded by root.");
1.185 djm 262: options->local_forwards = xrealloc(options->local_forwards,
263: options->num_local_forwards + 1,
264: sizeof(*options->local_forwards));
1.17 markus 265: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 266:
1.172 stevesk 267: fwd->listen_host = newfwd->listen_host;
1.135 djm 268: fwd->listen_port = newfwd->listen_port;
1.172 stevesk 269: fwd->connect_host = newfwd->connect_host;
1.135 djm 270: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 271: }
272:
1.19 markus 273: /*
274: * Adds a remote TCP/IP port forward to options. Never returns if there is
275: * an error.
276: */
1.1 deraadt 277:
1.26 markus 278: void
1.135 djm 279: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 280: {
1.17 markus 281: Forward *fwd;
1.185 djm 282:
283: options->remote_forwards = xrealloc(options->remote_forwards,
284: options->num_remote_forwards + 1,
285: sizeof(*options->remote_forwards));
1.17 markus 286: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 287:
1.172 stevesk 288: fwd->listen_host = newfwd->listen_host;
1.135 djm 289: fwd->listen_port = newfwd->listen_port;
1.172 stevesk 290: fwd->connect_host = newfwd->connect_host;
1.135 djm 291: fwd->connect_port = newfwd->connect_port;
1.184 markus 292: fwd->allocated_port = 0;
1.1 deraadt 293: }
294:
1.90 stevesk 295: static void
296: clear_forwardings(Options *options)
297: {
298: int i;
299:
1.135 djm 300: for (i = 0; i < options->num_local_forwards; i++) {
1.138 dtucker 301: if (options->local_forwards[i].listen_host != NULL)
302: xfree(options->local_forwards[i].listen_host);
1.135 djm 303: xfree(options->local_forwards[i].connect_host);
304: }
1.185 djm 305: if (options->num_local_forwards > 0) {
306: xfree(options->local_forwards);
307: options->local_forwards = NULL;
308: }
1.90 stevesk 309: options->num_local_forwards = 0;
1.135 djm 310: for (i = 0; i < options->num_remote_forwards; i++) {
1.138 dtucker 311: if (options->remote_forwards[i].listen_host != NULL)
312: xfree(options->remote_forwards[i].listen_host);
1.135 djm 313: xfree(options->remote_forwards[i].connect_host);
314: }
1.185 djm 315: if (options->num_remote_forwards > 0) {
316: xfree(options->remote_forwards);
317: options->remote_forwards = NULL;
318: }
1.90 stevesk 319: options->num_remote_forwards = 0;
1.145 reyk 320: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 321: }
322:
1.19 markus 323: /*
1.70 stevesk 324: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 325: */
1.1 deraadt 326:
1.26 markus 327: static OpCodes
1.17 markus 328: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 329: {
1.51 markus 330: u_int i;
1.1 deraadt 331:
1.17 markus 332: for (i = 0; keywords[i].name; i++)
1.20 markus 333: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 334: return keywords[i].opcode;
335:
1.75 stevesk 336: error("%s: line %d: Bad configuration option: %s",
337: filename, linenum, cp);
1.17 markus 338: return oBadOption;
1.1 deraadt 339: }
340:
1.19 markus 341: /*
342: * Processes a single option line as used in the configuration files. This
343: * only sets those values that have not already been set.
344: */
1.102 markus 345: #define WHITESPACE " \t\r\n"
1.1 deraadt 346:
1.14 markus 347: int
348: process_config_line(Options *options, const char *host,
1.17 markus 349: char *line, const char *filename, int linenum,
350: int *activep)
1.1 deraadt 351: {
1.135 djm 352: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
1.191 ! djm 353: int negated, opcode, *intptr, value, value2, scale;
1.164 dtucker 354: LogLevel *log_level_ptr;
1.146 djm 355: long long orig, val64;
1.102 markus 356: size_t len;
1.135 djm 357: Forward fwd;
1.106 djm 358:
359: /* Strip trailing whitespace */
1.139 deraadt 360: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 361: if (strchr(WHITESPACE, line[len]) == NULL)
362: break;
363: line[len] = '\0';
364: }
1.1 deraadt 365:
1.42 provos 366: s = line;
367: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 368: if ((keyword = strdelim(&s)) == NULL)
369: return 0;
1.42 provos 370: /* Ignore leading whitespace. */
371: if (*keyword == '\0')
1.43 markus 372: keyword = strdelim(&s);
1.56 deraadt 373: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 374: return 0;
375:
1.38 provos 376: opcode = parse_token(keyword, filename, linenum);
1.17 markus 377:
378: switch (opcode) {
379: case oBadOption:
1.19 markus 380: /* don't panic, but count bad options */
381: return -1;
1.17 markus 382: /* NOTREACHED */
1.111 djm 383: case oConnectTimeout:
384: intptr = &options->connection_timeout;
1.127 markus 385: parse_time:
1.111 djm 386: arg = strdelim(&s);
387: if (!arg || *arg == '\0')
388: fatal("%s line %d: missing time value.",
389: filename, linenum);
390: if ((value = convtime(arg)) == -1)
391: fatal("%s line %d: invalid time value.",
392: filename, linenum);
1.160 dtucker 393: if (*activep && *intptr == -1)
1.111 djm 394: *intptr = value;
395: break;
396:
1.17 markus 397: case oForwardAgent:
398: intptr = &options->forward_agent;
399: parse_flag:
1.42 provos 400: arg = strdelim(&s);
1.40 ho 401: if (!arg || *arg == '\0')
1.17 markus 402: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
403: value = 0; /* To avoid compiler warning... */
1.38 provos 404: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 405: value = 1;
1.38 provos 406: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 407: value = 0;
408: else
409: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
410: if (*activep && *intptr == -1)
411: *intptr = value;
412: break;
413:
414: case oForwardX11:
415: intptr = &options->forward_x11;
416: goto parse_flag;
417:
1.123 markus 418: case oForwardX11Trusted:
419: intptr = &options->forward_x11_trusted;
420: goto parse_flag;
1.186 djm 421:
422: case oForwardX11Timeout:
423: intptr = &options->forward_x11_timeout;
424: goto parse_time;
1.123 markus 425:
1.17 markus 426: case oGatewayPorts:
427: intptr = &options->gateway_ports;
428: goto parse_flag;
429:
1.153 markus 430: case oExitOnForwardFailure:
431: intptr = &options->exit_on_forward_failure;
432: goto parse_flag;
433:
1.17 markus 434: case oUsePrivilegedPort:
435: intptr = &options->use_privileged_port;
436: goto parse_flag;
437:
438: case oPasswordAuthentication:
439: intptr = &options->password_authentication;
440: goto parse_flag;
441:
1.171 djm 442: case oZeroKnowledgePasswordAuthentication:
443: intptr = &options->zero_knowledge_password_authentication;
444: goto parse_flag;
445:
1.48 markus 446: case oKbdInteractiveAuthentication:
447: intptr = &options->kbd_interactive_authentication;
448: goto parse_flag;
449:
450: case oKbdInteractiveDevices:
451: charptr = &options->kbd_interactive_devices;
452: goto parse_string;
453:
1.50 markus 454: case oPubkeyAuthentication:
455: intptr = &options->pubkey_authentication;
1.30 markus 456: goto parse_flag;
457:
1.17 markus 458: case oRSAAuthentication:
459: intptr = &options->rsa_authentication;
460: goto parse_flag;
461:
462: case oRhostsRSAAuthentication:
463: intptr = &options->rhosts_rsa_authentication;
464: goto parse_flag;
465:
1.72 markus 466: case oHostbasedAuthentication:
467: intptr = &options->hostbased_authentication;
468: goto parse_flag;
469:
1.59 markus 470: case oChallengeResponseAuthentication:
1.78 markus 471: intptr = &options->challenge_response_authentication;
1.17 markus 472: goto parse_flag;
1.108 jakob 473:
1.118 markus 474: case oGssAuthentication:
475: intptr = &options->gss_authentication;
476: goto parse_flag;
477:
478: case oGssDelegateCreds:
479: intptr = &options->gss_deleg_creds;
480: goto parse_flag;
481:
1.17 markus 482: case oBatchMode:
483: intptr = &options->batch_mode;
484: goto parse_flag;
485:
486: case oCheckHostIP:
487: intptr = &options->check_host_ip;
1.167 grunk 488: goto parse_flag;
1.17 markus 489:
1.107 jakob 490: case oVerifyHostKeyDNS:
491: intptr = &options->verify_host_key_dns;
1.125 jakob 492: goto parse_yesnoask;
1.107 jakob 493:
1.17 markus 494: case oStrictHostKeyChecking:
495: intptr = &options->strict_host_key_checking;
1.125 jakob 496: parse_yesnoask:
1.42 provos 497: arg = strdelim(&s);
1.40 ho 498: if (!arg || *arg == '\0')
1.60 stevesk 499: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 500: filename, linenum);
1.17 markus 501: value = 0; /* To avoid compiler warning... */
1.38 provos 502: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 503: value = 1;
1.38 provos 504: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 505: value = 0;
1.38 provos 506: else if (strcmp(arg, "ask") == 0)
1.17 markus 507: value = 2;
508: else
509: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
510: if (*activep && *intptr == -1)
511: *intptr = value;
512: break;
513:
514: case oCompression:
515: intptr = &options->compression;
516: goto parse_flag;
517:
1.126 markus 518: case oTCPKeepAlive:
519: intptr = &options->tcp_keep_alive;
1.17 markus 520: goto parse_flag;
521:
1.91 markus 522: case oNoHostAuthenticationForLocalhost:
523: intptr = &options->no_host_authentication_for_localhost;
524: goto parse_flag;
525:
1.17 markus 526: case oNumberOfPasswordPrompts:
527: intptr = &options->number_of_password_prompts;
528: goto parse_int;
529:
530: case oCompressionLevel:
531: intptr = &options->compression_level;
532: goto parse_int;
533:
1.105 markus 534: case oRekeyLimit:
535: arg = strdelim(&s);
536: if (!arg || *arg == '\0')
537: fatal("%.200s line %d: Missing argument.", filename, linenum);
538: if (arg[0] < '0' || arg[0] > '9')
539: fatal("%.200s line %d: Bad number.", filename, linenum);
1.146 djm 540: orig = val64 = strtoll(arg, &endofnumber, 10);
1.105 markus 541: if (arg == endofnumber)
542: fatal("%.200s line %d: Bad number.", filename, linenum);
543: switch (toupper(*endofnumber)) {
1.146 djm 544: case '\0':
545: scale = 1;
546: break;
1.105 markus 547: case 'K':
1.146 djm 548: scale = 1<<10;
1.105 markus 549: break;
550: case 'M':
1.146 djm 551: scale = 1<<20;
1.105 markus 552: break;
553: case 'G':
1.146 djm 554: scale = 1<<30;
1.105 markus 555: break;
1.146 djm 556: default:
557: fatal("%.200s line %d: Invalid RekeyLimit suffix",
558: filename, linenum);
1.105 markus 559: }
1.146 djm 560: val64 *= scale;
561: /* detect integer wrap and too-large limits */
1.165 djm 562: if ((val64 / scale) != orig || val64 > UINT_MAX)
1.146 djm 563: fatal("%.200s line %d: RekeyLimit too large",
564: filename, linenum);
565: if (val64 < 16)
566: fatal("%.200s line %d: RekeyLimit too small",
567: filename, linenum);
1.165 djm 568: if (*activep && options->rekey_limit == -1)
569: options->rekey_limit = (u_int32_t)val64;
1.105 markus 570: break;
571:
1.17 markus 572: case oIdentityFile:
1.42 provos 573: arg = strdelim(&s);
1.40 ho 574: if (!arg || *arg == '\0')
1.17 markus 575: fatal("%.200s line %d: Missing argument.", filename, linenum);
576: if (*activep) {
1.50 markus 577: intptr = &options->num_identity_files;
1.27 markus 578: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 579: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 580: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.161 stevesk 581: charptr = &options->identity_files[*intptr];
1.38 provos 582: *charptr = xstrdup(arg);
1.27 markus 583: *intptr = *intptr + 1;
1.17 markus 584: }
585: break;
586:
1.34 markus 587: case oXAuthLocation:
588: charptr=&options->xauth_location;
589: goto parse_string;
590:
1.17 markus 591: case oUser:
592: charptr = &options->user;
593: parse_string:
1.42 provos 594: arg = strdelim(&s);
1.40 ho 595: if (!arg || *arg == '\0')
1.17 markus 596: fatal("%.200s line %d: Missing argument.", filename, linenum);
597: if (*activep && *charptr == NULL)
1.38 provos 598: *charptr = xstrdup(arg);
1.17 markus 599: break;
600:
601: case oGlobalKnownHostsFile:
602: charptr = &options->system_hostfile;
603: goto parse_string;
604:
605: case oUserKnownHostsFile:
606: charptr = &options->user_hostfile;
607: goto parse_string;
608:
1.27 markus 609: case oGlobalKnownHostsFile2:
610: charptr = &options->system_hostfile2;
611: goto parse_string;
612:
613: case oUserKnownHostsFile2:
614: charptr = &options->user_hostfile2;
615: goto parse_string;
616:
1.17 markus 617: case oHostName:
618: charptr = &options->hostname;
619: goto parse_string;
620:
1.52 markus 621: case oHostKeyAlias:
622: charptr = &options->host_key_alias;
623: goto parse_string;
624:
1.67 markus 625: case oPreferredAuthentications:
626: charptr = &options->preferred_authentications;
627: goto parse_string;
628:
1.77 markus 629: case oBindAddress:
630: charptr = &options->bind_address;
631: goto parse_string;
632:
1.183 markus 633: case oPKCS11Provider:
634: charptr = &options->pkcs11_provider;
1.86 markus 635: goto parse_string;
1.85 jakob 636:
1.17 markus 637: case oProxyCommand:
1.144 reyk 638: charptr = &options->proxy_command;
639: parse_command:
1.113 markus 640: if (s == NULL)
641: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 642: len = strspn(s, WHITESPACE "=");
1.17 markus 643: if (*activep && *charptr == NULL)
1.102 markus 644: *charptr = xstrdup(s + len);
1.17 markus 645: return 0;
646:
647: case oPort:
648: intptr = &options->port;
649: parse_int:
1.42 provos 650: arg = strdelim(&s);
1.40 ho 651: if (!arg || *arg == '\0')
1.17 markus 652: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 653: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 654: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 655:
656: /* Octal, decimal, or hex format? */
1.38 provos 657: value = strtol(arg, &endofnumber, 0);
658: if (arg == endofnumber)
1.21 markus 659: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 660: if (*activep && *intptr == -1)
661: *intptr = value;
662: break;
663:
664: case oConnectionAttempts:
665: intptr = &options->connection_attempts;
666: goto parse_int;
667:
668: case oCipher:
669: intptr = &options->cipher;
1.42 provos 670: arg = strdelim(&s);
1.40 ho 671: if (!arg || *arg == '\0')
1.32 markus 672: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 673: value = cipher_number(arg);
1.17 markus 674: if (value == -1)
675: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 676: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 677: if (*activep && *intptr == -1)
678: *intptr = value;
679: break;
680:
1.25 markus 681: case oCiphers:
1.42 provos 682: arg = strdelim(&s);
1.40 ho 683: if (!arg || *arg == '\0')
1.32 markus 684: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 685: if (!ciphers_valid(arg))
1.31 markus 686: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 687: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 688: if (*activep && options->ciphers == NULL)
1.38 provos 689: options->ciphers = xstrdup(arg);
1.25 markus 690: break;
691:
1.62 markus 692: case oMacs:
693: arg = strdelim(&s);
694: if (!arg || *arg == '\0')
695: fatal("%.200s line %d: Missing argument.", filename, linenum);
696: if (!mac_valid(arg))
697: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 698: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 699: if (*activep && options->macs == NULL)
700: options->macs = xstrdup(arg);
701: break;
702:
1.189 djm 703: case oKexAlgorithms:
704: arg = strdelim(&s);
705: if (!arg || *arg == '\0')
706: fatal("%.200s line %d: Missing argument.",
707: filename, linenum);
708: if (!kex_names_valid(arg))
709: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
710: filename, linenum, arg ? arg : "<NONE>");
711: if (*activep && options->kex_algorithms == NULL)
712: options->kex_algorithms = xstrdup(arg);
713: break;
714:
1.76 markus 715: case oHostKeyAlgorithms:
716: arg = strdelim(&s);
717: if (!arg || *arg == '\0')
718: fatal("%.200s line %d: Missing argument.", filename, linenum);
719: if (!key_names_valid2(arg))
720: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 721: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 722: if (*activep && options->hostkeyalgorithms == NULL)
723: options->hostkeyalgorithms = xstrdup(arg);
724: break;
725:
1.25 markus 726: case oProtocol:
727: intptr = &options->protocol;
1.42 provos 728: arg = strdelim(&s);
1.40 ho 729: if (!arg || *arg == '\0')
1.32 markus 730: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 731: value = proto_spec(arg);
1.25 markus 732: if (value == SSH_PROTO_UNKNOWN)
733: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 734: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 735: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
736: *intptr = value;
737: break;
738:
1.17 markus 739: case oLogLevel:
1.164 dtucker 740: log_level_ptr = &options->log_level;
1.42 provos 741: arg = strdelim(&s);
1.38 provos 742: value = log_level_number(arg);
1.95 markus 743: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 744: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 745: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 746: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
747: *log_level_ptr = (LogLevel) value;
1.17 markus 748: break;
749:
1.88 stevesk 750: case oLocalForward:
1.17 markus 751: case oRemoteForward:
1.168 stevesk 752: case oDynamicForward:
1.42 provos 753: arg = strdelim(&s);
1.135 djm 754: if (arg == NULL || *arg == '\0')
1.88 stevesk 755: fatal("%.200s line %d: Missing port argument.",
756: filename, linenum);
1.135 djm 757:
1.168 stevesk 758: if (opcode == oLocalForward ||
759: opcode == oRemoteForward) {
760: arg2 = strdelim(&s);
761: if (arg2 == NULL || *arg2 == '\0')
762: fatal("%.200s line %d: Missing target argument.",
763: filename, linenum);
1.135 djm 764:
1.168 stevesk 765: /* construct a string for parse_forward */
766: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
767: } else if (opcode == oDynamicForward) {
768: strlcpy(fwdarg, arg, sizeof(fwdarg));
769: }
770:
771: if (parse_forward(&fwd, fwdarg,
1.176 djm 772: opcode == oDynamicForward ? 1 : 0,
773: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 774: fatal("%.200s line %d: Bad forwarding specification.",
775: filename, linenum);
1.135 djm 776:
1.88 stevesk 777: if (*activep) {
1.168 stevesk 778: if (opcode == oLocalForward ||
779: opcode == oDynamicForward)
1.135 djm 780: add_local_forward(options, &fwd);
1.88 stevesk 781: else if (opcode == oRemoteForward)
1.135 djm 782: add_remote_forward(options, &fwd);
1.88 stevesk 783: }
1.17 markus 784: break;
1.71 markus 785:
1.90 stevesk 786: case oClearAllForwardings:
787: intptr = &options->clear_forwardings;
788: goto parse_flag;
789:
1.17 markus 790: case oHost:
791: *activep = 0;
1.191 ! djm 792: arg2 = NULL;
! 793: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
! 794: negated = *arg == '!';
! 795: if (negated)
! 796: arg++;
1.38 provos 797: if (match_pattern(host, arg)) {
1.191 ! djm 798: if (negated) {
! 799: debug("%.200s line %d: Skipping Host "
! 800: "block because of negated match "
! 801: "for %.100s", filename, linenum,
! 802: arg);
! 803: *activep = 0;
! 804: break;
! 805: }
! 806: if (!*activep)
! 807: arg2 = arg; /* logged below */
1.17 markus 808: *activep = 1;
809: }
1.191 ! djm 810: }
! 811: if (*activep)
! 812: debug("%.200s line %d: Applying options for %.100s",
! 813: filename, linenum, arg2);
1.42 provos 814: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 815: return 0;
816:
817: case oEscapeChar:
818: intptr = &options->escape_char;
1.42 provos 819: arg = strdelim(&s);
1.40 ho 820: if (!arg || *arg == '\0')
1.17 markus 821: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 822: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 823: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
824: value = (u_char) arg[1] & 31;
1.38 provos 825: else if (strlen(arg) == 1)
1.51 markus 826: value = (u_char) arg[0];
1.38 provos 827: else if (strcmp(arg, "none") == 0)
1.79 stevesk 828: value = SSH_ESCAPECHAR_NONE;
1.17 markus 829: else {
830: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 831: filename, linenum);
1.17 markus 832: /* NOTREACHED */
833: value = 0; /* Avoid compiler warning. */
834: }
835: if (*activep && *intptr == -1)
836: *intptr = value;
1.112 djm 837: break;
838:
839: case oAddressFamily:
840: arg = strdelim(&s);
1.140 markus 841: if (!arg || *arg == '\0')
842: fatal("%s line %d: missing address family.",
843: filename, linenum);
1.114 djm 844: intptr = &options->address_family;
1.112 djm 845: if (strcasecmp(arg, "inet") == 0)
1.114 djm 846: value = AF_INET;
1.112 djm 847: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 848: value = AF_INET6;
1.112 djm 849: else if (strcasecmp(arg, "any") == 0)
1.114 djm 850: value = AF_UNSPEC;
1.112 djm 851: else
852: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 853: if (*activep && *intptr == -1)
854: *intptr = value;
1.17 markus 855: break;
856:
1.101 markus 857: case oEnableSSHKeysign:
858: intptr = &options->enable_ssh_keysign;
859: goto parse_flag;
860:
1.128 markus 861: case oIdentitiesOnly:
862: intptr = &options->identities_only;
863: goto parse_flag;
864:
1.127 markus 865: case oServerAliveInterval:
866: intptr = &options->server_alive_interval;
867: goto parse_time;
868:
869: case oServerAliveCountMax:
870: intptr = &options->server_alive_count_max;
871: goto parse_int;
872:
1.130 djm 873: case oSendEnv:
874: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
875: if (strchr(arg, '=') != NULL)
876: fatal("%s line %d: Invalid environment name.",
877: filename, linenum);
1.137 djm 878: if (!*activep)
879: continue;
1.130 djm 880: if (options->num_send_env >= MAX_SEND_ENV)
881: fatal("%s line %d: too many send env.",
882: filename, linenum);
883: options->send_env[options->num_send_env++] =
884: xstrdup(arg);
885: }
886: break;
887:
1.132 djm 888: case oControlPath:
889: charptr = &options->control_path;
890: goto parse_string;
891:
892: case oControlMaster:
893: intptr = &options->control_master;
1.141 djm 894: arg = strdelim(&s);
895: if (!arg || *arg == '\0')
896: fatal("%.200s line %d: Missing ControlMaster argument.",
897: filename, linenum);
898: value = 0; /* To avoid compiler warning... */
899: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
900: value = SSHCTL_MASTER_YES;
901: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
902: value = SSHCTL_MASTER_NO;
903: else if (strcmp(arg, "auto") == 0)
904: value = SSHCTL_MASTER_AUTO;
905: else if (strcmp(arg, "ask") == 0)
906: value = SSHCTL_MASTER_ASK;
907: else if (strcmp(arg, "autoask") == 0)
908: value = SSHCTL_MASTER_AUTO_ASK;
909: else
910: fatal("%.200s line %d: Bad ControlMaster argument.",
911: filename, linenum);
912: if (*activep && *intptr == -1)
913: *intptr = value;
914: break;
1.132 djm 915:
1.187 djm 916: case oControlPersist:
917: /* no/false/yes/true, or a time spec */
918: intptr = &options->control_persist;
919: arg = strdelim(&s);
920: if (!arg || *arg == '\0')
921: fatal("%.200s line %d: Missing ControlPersist"
922: " argument.", filename, linenum);
923: value = 0;
924: value2 = 0; /* timeout */
925: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
926: value = 0;
927: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
928: value = 1;
929: else if ((value2 = convtime(arg)) >= 0)
930: value = 1;
931: else
932: fatal("%.200s line %d: Bad ControlPersist argument.",
933: filename, linenum);
934: if (*activep && *intptr == -1) {
935: *intptr = value;
936: options->control_persist_timeout = value2;
937: }
938: break;
939:
1.136 djm 940: case oHashKnownHosts:
941: intptr = &options->hash_known_hosts;
942: goto parse_flag;
943:
1.144 reyk 944: case oTunnel:
945: intptr = &options->tun_open;
1.145 reyk 946: arg = strdelim(&s);
947: if (!arg || *arg == '\0')
948: fatal("%s line %d: Missing yes/point-to-point/"
949: "ethernet/no argument.", filename, linenum);
950: value = 0; /* silence compiler */
951: if (strcasecmp(arg, "ethernet") == 0)
952: value = SSH_TUNMODE_ETHERNET;
953: else if (strcasecmp(arg, "point-to-point") == 0)
954: value = SSH_TUNMODE_POINTOPOINT;
955: else if (strcasecmp(arg, "yes") == 0)
956: value = SSH_TUNMODE_DEFAULT;
957: else if (strcasecmp(arg, "no") == 0)
958: value = SSH_TUNMODE_NO;
959: else
960: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
961: "no argument: %s", filename, linenum, arg);
962: if (*activep)
963: *intptr = value;
964: break;
1.144 reyk 965:
966: case oTunnelDevice:
967: arg = strdelim(&s);
968: if (!arg || *arg == '\0')
969: fatal("%.200s line %d: Missing argument.", filename, linenum);
970: value = a2tun(arg, &value2);
1.145 reyk 971: if (value == SSH_TUNID_ERR)
1.144 reyk 972: fatal("%.200s line %d: Bad tun device.", filename, linenum);
973: if (*activep) {
974: options->tun_local = value;
975: options->tun_remote = value2;
976: }
977: break;
978:
979: case oLocalCommand:
980: charptr = &options->local_command;
981: goto parse_command;
982:
983: case oPermitLocalCommand:
984: intptr = &options->permit_local_command;
985: goto parse_flag;
986:
1.167 grunk 987: case oVisualHostKey:
988: intptr = &options->visual_host_key;
989: goto parse_flag;
990:
1.190 djm 991: case oIPQoS:
992: arg = strdelim(&s);
993: if ((value = parse_ipqos(arg)) == -1)
994: fatal("%s line %d: Bad IPQoS value: %s",
995: filename, linenum, arg);
996: arg = strdelim(&s);
997: if (arg == NULL)
998: value2 = value;
999: else if ((value2 = parse_ipqos(arg)) == -1)
1000: fatal("%s line %d: Bad IPQoS value: %s",
1001: filename, linenum, arg);
1002: if (*activep) {
1003: options->ip_qos_interactive = value;
1004: options->ip_qos_bulk = value2;
1005: }
1006: break;
1007:
1.177 andreas 1008: case oUseRoaming:
1009: intptr = &options->use_roaming;
1010: goto parse_flag;
1011:
1.96 markus 1012: case oDeprecated:
1.98 markus 1013: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1014: filename, linenum, keyword);
1.98 markus 1015: return 0;
1.96 markus 1016:
1.110 jakob 1017: case oUnsupported:
1018: error("%s line %d: Unsupported option \"%s\"",
1019: filename, linenum, keyword);
1020: return 0;
1021:
1.17 markus 1022: default:
1023: fatal("process_config_line: Unimplemented opcode %d", opcode);
1024: }
1025:
1026: /* Check that there is no garbage at end of line. */
1.57 djm 1027: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1028: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1029: filename, linenum, arg);
1.39 ho 1030: }
1.17 markus 1031: return 0;
1.1 deraadt 1032: }
1033:
1034:
1.19 markus 1035: /*
1036: * Reads the config file and modifies the options accordingly. Options
1037: * should already be initialized before this call. This never returns if
1.89 stevesk 1038: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1039: */
1.1 deraadt 1040:
1.89 stevesk 1041: int
1.134 deraadt 1042: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 1043: int checkperm)
1.1 deraadt 1044: {
1.17 markus 1045: FILE *f;
1046: char line[1024];
1047: int active, linenum;
1048: int bad_options = 0;
1049:
1.129 djm 1050: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1051: return 0;
1.129 djm 1052:
1053: if (checkperm) {
1054: struct stat sb;
1.134 deraadt 1055:
1.131 dtucker 1056: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1057: fatal("fstat %s: %s", filename, strerror(errno));
1058: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1059: (sb.st_mode & 022) != 0))
1.129 djm 1060: fatal("Bad owner or permissions on %s", filename);
1061: }
1.17 markus 1062:
1063: debug("Reading configuration data %.200s", filename);
1064:
1.19 markus 1065: /*
1066: * Mark that we are now processing the options. This flag is turned
1067: * on/off by Host specifications.
1068: */
1.17 markus 1069: active = 1;
1070: linenum = 0;
1071: while (fgets(line, sizeof(line), f)) {
1072: /* Update line number counter. */
1073: linenum++;
1074: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
1075: bad_options++;
1076: }
1077: fclose(f);
1078: if (bad_options > 0)
1.64 millert 1079: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1080: filename, bad_options);
1.89 stevesk 1081: return 1;
1.1 deraadt 1082: }
1083:
1.19 markus 1084: /*
1085: * Initializes options to special values that indicate that they have not yet
1086: * been set. Read_config_file will only set options with this value. Options
1087: * are processed in the following order: command line, user config file,
1088: * system config file. Last, fill_default_options is called.
1089: */
1.1 deraadt 1090:
1.26 markus 1091: void
1.17 markus 1092: initialize_options(Options * options)
1.1 deraadt 1093: {
1.17 markus 1094: memset(options, 'X', sizeof(*options));
1095: options->forward_agent = -1;
1096: options->forward_x11 = -1;
1.123 markus 1097: options->forward_x11_trusted = -1;
1.186 djm 1098: options->forward_x11_timeout = -1;
1.153 markus 1099: options->exit_on_forward_failure = -1;
1.34 markus 1100: options->xauth_location = NULL;
1.17 markus 1101: options->gateway_ports = -1;
1102: options->use_privileged_port = -1;
1103: options->rsa_authentication = -1;
1.50 markus 1104: options->pubkey_authentication = -1;
1.78 markus 1105: options->challenge_response_authentication = -1;
1.118 markus 1106: options->gss_authentication = -1;
1107: options->gss_deleg_creds = -1;
1.17 markus 1108: options->password_authentication = -1;
1.48 markus 1109: options->kbd_interactive_authentication = -1;
1110: options->kbd_interactive_devices = NULL;
1.17 markus 1111: options->rhosts_rsa_authentication = -1;
1.72 markus 1112: options->hostbased_authentication = -1;
1.17 markus 1113: options->batch_mode = -1;
1114: options->check_host_ip = -1;
1115: options->strict_host_key_checking = -1;
1116: options->compression = -1;
1.126 markus 1117: options->tcp_keep_alive = -1;
1.17 markus 1118: options->compression_level = -1;
1119: options->port = -1;
1.114 djm 1120: options->address_family = -1;
1.17 markus 1121: options->connection_attempts = -1;
1.111 djm 1122: options->connection_timeout = -1;
1.17 markus 1123: options->number_of_password_prompts = -1;
1124: options->cipher = -1;
1.25 markus 1125: options->ciphers = NULL;
1.62 markus 1126: options->macs = NULL;
1.189 djm 1127: options->kex_algorithms = NULL;
1.76 markus 1128: options->hostkeyalgorithms = NULL;
1.25 markus 1129: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1130: options->num_identity_files = 0;
1131: options->hostname = NULL;
1.52 markus 1132: options->host_key_alias = NULL;
1.17 markus 1133: options->proxy_command = NULL;
1134: options->user = NULL;
1135: options->escape_char = -1;
1136: options->system_hostfile = NULL;
1137: options->user_hostfile = NULL;
1.27 markus 1138: options->system_hostfile2 = NULL;
1139: options->user_hostfile2 = NULL;
1.185 djm 1140: options->local_forwards = NULL;
1.17 markus 1141: options->num_local_forwards = 0;
1.185 djm 1142: options->remote_forwards = NULL;
1.17 markus 1143: options->num_remote_forwards = 0;
1.90 stevesk 1144: options->clear_forwardings = -1;
1.95 markus 1145: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1146: options->preferred_authentications = NULL;
1.77 markus 1147: options->bind_address = NULL;
1.183 markus 1148: options->pkcs11_provider = NULL;
1.101 markus 1149: options->enable_ssh_keysign = - 1;
1.91 markus 1150: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1151: options->identities_only = - 1;
1.105 markus 1152: options->rekey_limit = - 1;
1.107 jakob 1153: options->verify_host_key_dns = -1;
1.127 markus 1154: options->server_alive_interval = -1;
1155: options->server_alive_count_max = -1;
1.130 djm 1156: options->num_send_env = 0;
1.132 djm 1157: options->control_path = NULL;
1158: options->control_master = -1;
1.187 djm 1159: options->control_persist = -1;
1160: options->control_persist_timeout = 0;
1.136 djm 1161: options->hash_known_hosts = -1;
1.144 reyk 1162: options->tun_open = -1;
1163: options->tun_local = -1;
1164: options->tun_remote = -1;
1165: options->local_command = NULL;
1166: options->permit_local_command = -1;
1.177 andreas 1167: options->use_roaming = -1;
1.167 grunk 1168: options->visual_host_key = -1;
1.171 djm 1169: options->zero_knowledge_password_authentication = -1;
1.190 djm 1170: options->ip_qos_interactive = -1;
1171: options->ip_qos_bulk = -1;
1.1 deraadt 1172: }
1173:
1.19 markus 1174: /*
1175: * Called after processing other sources of option data, this fills those
1176: * options for which no value has been specified with their default values.
1177: */
1.1 deraadt 1178:
1.26 markus 1179: void
1.17 markus 1180: fill_default_options(Options * options)
1.1 deraadt 1181: {
1.61 deraadt 1182: int len;
1183:
1.17 markus 1184: if (options->forward_agent == -1)
1.33 markus 1185: options->forward_agent = 0;
1.17 markus 1186: if (options->forward_x11 == -1)
1.23 markus 1187: options->forward_x11 = 0;
1.123 markus 1188: if (options->forward_x11_trusted == -1)
1189: options->forward_x11_trusted = 0;
1.186 djm 1190: if (options->forward_x11_timeout == -1)
1191: options->forward_x11_timeout = 1200;
1.153 markus 1192: if (options->exit_on_forward_failure == -1)
1193: options->exit_on_forward_failure = 0;
1.34 markus 1194: if (options->xauth_location == NULL)
1.80 markus 1195: options->xauth_location = _PATH_XAUTH;
1.17 markus 1196: if (options->gateway_ports == -1)
1197: options->gateway_ports = 0;
1198: if (options->use_privileged_port == -1)
1.65 markus 1199: options->use_privileged_port = 0;
1.17 markus 1200: if (options->rsa_authentication == -1)
1201: options->rsa_authentication = 1;
1.50 markus 1202: if (options->pubkey_authentication == -1)
1203: options->pubkey_authentication = 1;
1.78 markus 1204: if (options->challenge_response_authentication == -1)
1.83 markus 1205: options->challenge_response_authentication = 1;
1.118 markus 1206: if (options->gss_authentication == -1)
1.122 markus 1207: options->gss_authentication = 0;
1.118 markus 1208: if (options->gss_deleg_creds == -1)
1209: options->gss_deleg_creds = 0;
1.17 markus 1210: if (options->password_authentication == -1)
1211: options->password_authentication = 1;
1.48 markus 1212: if (options->kbd_interactive_authentication == -1)
1.59 markus 1213: options->kbd_interactive_authentication = 1;
1.17 markus 1214: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1215: options->rhosts_rsa_authentication = 0;
1.72 markus 1216: if (options->hostbased_authentication == -1)
1217: options->hostbased_authentication = 0;
1.17 markus 1218: if (options->batch_mode == -1)
1219: options->batch_mode = 0;
1220: if (options->check_host_ip == -1)
1221: options->check_host_ip = 1;
1222: if (options->strict_host_key_checking == -1)
1223: options->strict_host_key_checking = 2; /* 2 is default */
1224: if (options->compression == -1)
1225: options->compression = 0;
1.126 markus 1226: if (options->tcp_keep_alive == -1)
1227: options->tcp_keep_alive = 1;
1.17 markus 1228: if (options->compression_level == -1)
1229: options->compression_level = 6;
1230: if (options->port == -1)
1231: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1232: if (options->address_family == -1)
1233: options->address_family = AF_UNSPEC;
1.17 markus 1234: if (options->connection_attempts == -1)
1.84 markus 1235: options->connection_attempts = 1;
1.17 markus 1236: if (options->number_of_password_prompts == -1)
1237: options->number_of_password_prompts = 3;
1238: /* Selected in ssh_login(). */
1239: if (options->cipher == -1)
1240: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1241: /* options->ciphers, default set in myproposals.h */
1.62 markus 1242: /* options->macs, default set in myproposals.h */
1.189 djm 1243: /* options->kex_algorithms, default set in myproposals.h */
1.76 markus 1244: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1245: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1246: options->protocol = SSH_PROTO_2;
1.17 markus 1247: if (options->num_identity_files == 0) {
1.50 markus 1248: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1249: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1250: options->identity_files[options->num_identity_files] =
1.61 deraadt 1251: xmalloc(len);
1252: snprintf(options->identity_files[options->num_identity_files++],
1253: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1254: }
1255: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1256: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1257: options->identity_files[options->num_identity_files] =
1258: xmalloc(len);
1259: snprintf(options->identity_files[options->num_identity_files++],
1260: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1261:
1.61 deraadt 1262: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1263: options->identity_files[options->num_identity_files] =
1.61 deraadt 1264: xmalloc(len);
1265: snprintf(options->identity_files[options->num_identity_files++],
1266: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.188 djm 1267:
1268: len = 2 + strlen(_PATH_SSH_CLIENT_ID_ECDSA) + 1;
1269: options->identity_files[options->num_identity_files] =
1270: xmalloc(len);
1271: snprintf(options->identity_files[options->num_identity_files++],
1272: len, "~/%.100s", _PATH_SSH_CLIENT_ID_ECDSA);
1.50 markus 1273: }
1.27 markus 1274: }
1.17 markus 1275: if (options->escape_char == -1)
1276: options->escape_char = '~';
1277: if (options->system_hostfile == NULL)
1.55 markus 1278: options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
1.17 markus 1279: if (options->user_hostfile == NULL)
1.55 markus 1280: options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
1.27 markus 1281: if (options->system_hostfile2 == NULL)
1.55 markus 1282: options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
1.27 markus 1283: if (options->user_hostfile2 == NULL)
1.55 markus 1284: options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
1.95 markus 1285: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1286: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1287: if (options->clear_forwardings == 1)
1288: clear_forwardings(options);
1.91 markus 1289: if (options->no_host_authentication_for_localhost == - 1)
1290: options->no_host_authentication_for_localhost = 0;
1.128 markus 1291: if (options->identities_only == -1)
1292: options->identities_only = 0;
1.101 markus 1293: if (options->enable_ssh_keysign == -1)
1294: options->enable_ssh_keysign = 0;
1.105 markus 1295: if (options->rekey_limit == -1)
1296: options->rekey_limit = 0;
1.107 jakob 1297: if (options->verify_host_key_dns == -1)
1298: options->verify_host_key_dns = 0;
1.127 markus 1299: if (options->server_alive_interval == -1)
1300: options->server_alive_interval = 0;
1301: if (options->server_alive_count_max == -1)
1302: options->server_alive_count_max = 3;
1.132 djm 1303: if (options->control_master == -1)
1304: options->control_master = 0;
1.187 djm 1305: if (options->control_persist == -1) {
1306: options->control_persist = 0;
1307: options->control_persist_timeout = 0;
1308: }
1.136 djm 1309: if (options->hash_known_hosts == -1)
1310: options->hash_known_hosts = 0;
1.144 reyk 1311: if (options->tun_open == -1)
1.145 reyk 1312: options->tun_open = SSH_TUNMODE_NO;
1313: if (options->tun_local == -1)
1314: options->tun_local = SSH_TUNID_ANY;
1315: if (options->tun_remote == -1)
1316: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1317: if (options->permit_local_command == -1)
1318: options->permit_local_command = 0;
1.177 andreas 1319: if (options->use_roaming == -1)
1320: options->use_roaming = 1;
1.167 grunk 1321: if (options->visual_host_key == -1)
1322: options->visual_host_key = 0;
1.171 djm 1323: if (options->zero_knowledge_password_authentication == -1)
1324: options->zero_knowledge_password_authentication = 0;
1.190 djm 1325: if (options->ip_qos_interactive == -1)
1326: options->ip_qos_interactive = IPTOS_LOWDELAY;
1327: if (options->ip_qos_bulk == -1)
1328: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.144 reyk 1329: /* options->local_command should not be set by default */
1.17 markus 1330: /* options->proxy_command should not be set by default */
1331: /* options->user will be set in the main program if appropriate */
1332: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1333: /* options->host_key_alias should not be set by default */
1.67 markus 1334: /* options->preferred_authentications will be set in ssh */
1.135 djm 1335: }
1336:
1337: /*
1338: * parse_forward
1339: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 1340: * dynamicfwd == 0
1.135 djm 1341: * [listenhost:]listenport:connecthost:connectport
1.168 stevesk 1342: * dynamicfwd == 1
1343: * [listenhost:]listenport
1.135 djm 1344: * returns number of arguments parsed or zero on error
1345: */
1346: int
1.176 djm 1347: parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 1348: {
1349: int i;
1350: char *p, *cp, *fwdarg[4];
1351:
1352: memset(fwd, '\0', sizeof(*fwd));
1353:
1354: cp = p = xstrdup(fwdspec);
1355:
1356: /* skip leading spaces */
1.162 tedu 1357: while (isspace(*cp))
1.135 djm 1358: cp++;
1359:
1360: for (i = 0; i < 4; ++i)
1361: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1362: break;
1363:
1.170 stevesk 1364: /* Check for trailing garbage */
1.135 djm 1365: if (cp != NULL)
1366: i = 0; /* failure */
1367:
1368: switch (i) {
1.168 stevesk 1369: case 1:
1370: fwd->listen_host = NULL;
1371: fwd->listen_port = a2port(fwdarg[0]);
1372: fwd->connect_host = xstrdup("socks");
1373: break;
1374:
1375: case 2:
1376: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1377: fwd->listen_port = a2port(fwdarg[1]);
1378: fwd->connect_host = xstrdup("socks");
1379: break;
1380:
1.135 djm 1381: case 3:
1382: fwd->listen_host = NULL;
1383: fwd->listen_port = a2port(fwdarg[0]);
1384: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1385: fwd->connect_port = a2port(fwdarg[2]);
1386: break;
1387:
1388: case 4:
1389: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1390: fwd->listen_port = a2port(fwdarg[1]);
1391: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1392: fwd->connect_port = a2port(fwdarg[3]);
1393: break;
1394: default:
1395: i = 0; /* failure */
1396: }
1397:
1398: xfree(p);
1399:
1.168 stevesk 1400: if (dynamicfwd) {
1401: if (!(i == 1 || i == 2))
1402: goto fail_free;
1403: } else {
1404: if (!(i == 3 || i == 4))
1405: goto fail_free;
1.175 djm 1406: if (fwd->connect_port <= 0)
1.168 stevesk 1407: goto fail_free;
1408: }
1409:
1.176 djm 1410: if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0))
1.135 djm 1411: goto fail_free;
1412:
1413: if (fwd->connect_host != NULL &&
1414: strlen(fwd->connect_host) >= NI_MAXHOST)
1415: goto fail_free;
1.176 djm 1416: if (fwd->listen_host != NULL &&
1417: strlen(fwd->listen_host) >= NI_MAXHOST)
1418: goto fail_free;
1419:
1.135 djm 1420:
1421: return (i);
1422:
1423: fail_free:
1.173 djm 1424: if (fwd->connect_host != NULL) {
1.135 djm 1425: xfree(fwd->connect_host);
1.173 djm 1426: fwd->connect_host = NULL;
1427: }
1428: if (fwd->listen_host != NULL) {
1.135 djm 1429: xfree(fwd->listen_host);
1.173 djm 1430: fwd->listen_host = NULL;
1431: }
1.135 djm 1432: return (0);
1.1 deraadt 1433: }
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