Annotation of src/usr.bin/ssh/readconf.c, Revision 1.192
1.192 ! djm 1: /* $OpenBSD: readconf.c,v 1.191 2011/05/06 21:31:38 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,
1.192 ! djm 134: oKexAlgorithms, oIPQoS, oRequestTTY,
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 },
1.192 ! djm 245: { "requesttty", oRequestTTY },
1.171 djm 246:
1.92 stevesk 247: { NULL, oBadOption }
1.13 markus 248: };
249:
1.19 markus 250: /*
251: * Adds a local TCP/IP port forward to options. Never returns if there is an
252: * error.
253: */
1.1 deraadt 254:
1.26 markus 255: void
1.135 djm 256: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 257: {
1.17 markus 258: Forward *fwd;
259: extern uid_t original_real_uid;
1.185 djm 260:
1.135 djm 261: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 262: fatal("Privileged ports can only be forwarded by root.");
1.185 djm 263: options->local_forwards = xrealloc(options->local_forwards,
264: options->num_local_forwards + 1,
265: sizeof(*options->local_forwards));
1.17 markus 266: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 267:
1.172 stevesk 268: fwd->listen_host = newfwd->listen_host;
1.135 djm 269: fwd->listen_port = newfwd->listen_port;
1.172 stevesk 270: fwd->connect_host = newfwd->connect_host;
1.135 djm 271: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 272: }
273:
1.19 markus 274: /*
275: * Adds a remote TCP/IP port forward to options. Never returns if there is
276: * an error.
277: */
1.1 deraadt 278:
1.26 markus 279: void
1.135 djm 280: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 281: {
1.17 markus 282: Forward *fwd;
1.185 djm 283:
284: options->remote_forwards = xrealloc(options->remote_forwards,
285: options->num_remote_forwards + 1,
286: sizeof(*options->remote_forwards));
1.17 markus 287: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 288:
1.172 stevesk 289: fwd->listen_host = newfwd->listen_host;
1.135 djm 290: fwd->listen_port = newfwd->listen_port;
1.172 stevesk 291: fwd->connect_host = newfwd->connect_host;
1.135 djm 292: fwd->connect_port = newfwd->connect_port;
1.184 markus 293: fwd->allocated_port = 0;
1.1 deraadt 294: }
295:
1.90 stevesk 296: static void
297: clear_forwardings(Options *options)
298: {
299: int i;
300:
1.135 djm 301: for (i = 0; i < options->num_local_forwards; i++) {
1.138 dtucker 302: if (options->local_forwards[i].listen_host != NULL)
303: xfree(options->local_forwards[i].listen_host);
1.135 djm 304: xfree(options->local_forwards[i].connect_host);
305: }
1.185 djm 306: if (options->num_local_forwards > 0) {
307: xfree(options->local_forwards);
308: options->local_forwards = NULL;
309: }
1.90 stevesk 310: options->num_local_forwards = 0;
1.135 djm 311: for (i = 0; i < options->num_remote_forwards; i++) {
1.138 dtucker 312: if (options->remote_forwards[i].listen_host != NULL)
313: xfree(options->remote_forwards[i].listen_host);
1.135 djm 314: xfree(options->remote_forwards[i].connect_host);
315: }
1.185 djm 316: if (options->num_remote_forwards > 0) {
317: xfree(options->remote_forwards);
318: options->remote_forwards = NULL;
319: }
1.90 stevesk 320: options->num_remote_forwards = 0;
1.145 reyk 321: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 322: }
323:
1.19 markus 324: /*
1.70 stevesk 325: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 326: */
1.1 deraadt 327:
1.26 markus 328: static OpCodes
1.17 markus 329: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 330: {
1.51 markus 331: u_int i;
1.1 deraadt 332:
1.17 markus 333: for (i = 0; keywords[i].name; i++)
1.20 markus 334: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 335: return keywords[i].opcode;
336:
1.75 stevesk 337: error("%s: line %d: Bad configuration option: %s",
338: filename, linenum, cp);
1.17 markus 339: return oBadOption;
1.1 deraadt 340: }
341:
1.19 markus 342: /*
343: * Processes a single option line as used in the configuration files. This
344: * only sets those values that have not already been set.
345: */
1.102 markus 346: #define WHITESPACE " \t\r\n"
1.1 deraadt 347:
1.14 markus 348: int
349: process_config_line(Options *options, const char *host,
1.17 markus 350: char *line, const char *filename, int linenum,
351: int *activep)
1.1 deraadt 352: {
1.135 djm 353: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
1.191 djm 354: int negated, opcode, *intptr, value, value2, scale;
1.164 dtucker 355: LogLevel *log_level_ptr;
1.146 djm 356: long long orig, val64;
1.102 markus 357: size_t len;
1.135 djm 358: Forward fwd;
1.106 djm 359:
360: /* Strip trailing whitespace */
1.139 deraadt 361: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 362: if (strchr(WHITESPACE, line[len]) == NULL)
363: break;
364: line[len] = '\0';
365: }
1.1 deraadt 366:
1.42 provos 367: s = line;
368: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 369: if ((keyword = strdelim(&s)) == NULL)
370: return 0;
1.42 provos 371: /* Ignore leading whitespace. */
372: if (*keyword == '\0')
1.43 markus 373: keyword = strdelim(&s);
1.56 deraadt 374: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 375: return 0;
376:
1.38 provos 377: opcode = parse_token(keyword, filename, linenum);
1.17 markus 378:
379: switch (opcode) {
380: case oBadOption:
1.19 markus 381: /* don't panic, but count bad options */
382: return -1;
1.17 markus 383: /* NOTREACHED */
1.111 djm 384: case oConnectTimeout:
385: intptr = &options->connection_timeout;
1.127 markus 386: parse_time:
1.111 djm 387: arg = strdelim(&s);
388: if (!arg || *arg == '\0')
389: fatal("%s line %d: missing time value.",
390: filename, linenum);
391: if ((value = convtime(arg)) == -1)
392: fatal("%s line %d: invalid time value.",
393: filename, linenum);
1.160 dtucker 394: if (*activep && *intptr == -1)
1.111 djm 395: *intptr = value;
396: break;
397:
1.17 markus 398: case oForwardAgent:
399: intptr = &options->forward_agent;
400: parse_flag:
1.42 provos 401: arg = strdelim(&s);
1.40 ho 402: if (!arg || *arg == '\0')
1.17 markus 403: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
404: value = 0; /* To avoid compiler warning... */
1.38 provos 405: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 406: value = 1;
1.38 provos 407: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 408: value = 0;
409: else
410: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
411: if (*activep && *intptr == -1)
412: *intptr = value;
413: break;
414:
415: case oForwardX11:
416: intptr = &options->forward_x11;
417: goto parse_flag;
418:
1.123 markus 419: case oForwardX11Trusted:
420: intptr = &options->forward_x11_trusted;
421: goto parse_flag;
1.186 djm 422:
423: case oForwardX11Timeout:
424: intptr = &options->forward_x11_timeout;
425: goto parse_time;
1.123 markus 426:
1.17 markus 427: case oGatewayPorts:
428: intptr = &options->gateway_ports;
429: goto parse_flag;
430:
1.153 markus 431: case oExitOnForwardFailure:
432: intptr = &options->exit_on_forward_failure;
433: goto parse_flag;
434:
1.17 markus 435: case oUsePrivilegedPort:
436: intptr = &options->use_privileged_port;
437: goto parse_flag;
438:
439: case oPasswordAuthentication:
440: intptr = &options->password_authentication;
441: goto parse_flag;
442:
1.171 djm 443: case oZeroKnowledgePasswordAuthentication:
444: intptr = &options->zero_knowledge_password_authentication;
445: goto parse_flag;
446:
1.48 markus 447: case oKbdInteractiveAuthentication:
448: intptr = &options->kbd_interactive_authentication;
449: goto parse_flag;
450:
451: case oKbdInteractiveDevices:
452: charptr = &options->kbd_interactive_devices;
453: goto parse_string;
454:
1.50 markus 455: case oPubkeyAuthentication:
456: intptr = &options->pubkey_authentication;
1.30 markus 457: goto parse_flag;
458:
1.17 markus 459: case oRSAAuthentication:
460: intptr = &options->rsa_authentication;
461: goto parse_flag;
462:
463: case oRhostsRSAAuthentication:
464: intptr = &options->rhosts_rsa_authentication;
465: goto parse_flag;
466:
1.72 markus 467: case oHostbasedAuthentication:
468: intptr = &options->hostbased_authentication;
469: goto parse_flag;
470:
1.59 markus 471: case oChallengeResponseAuthentication:
1.78 markus 472: intptr = &options->challenge_response_authentication;
1.17 markus 473: goto parse_flag;
1.108 jakob 474:
1.118 markus 475: case oGssAuthentication:
476: intptr = &options->gss_authentication;
477: goto parse_flag;
478:
479: case oGssDelegateCreds:
480: intptr = &options->gss_deleg_creds;
481: goto parse_flag;
482:
1.17 markus 483: case oBatchMode:
484: intptr = &options->batch_mode;
485: goto parse_flag;
486:
487: case oCheckHostIP:
488: intptr = &options->check_host_ip;
1.167 grunk 489: goto parse_flag;
1.17 markus 490:
1.107 jakob 491: case oVerifyHostKeyDNS:
492: intptr = &options->verify_host_key_dns;
1.125 jakob 493: goto parse_yesnoask;
1.107 jakob 494:
1.17 markus 495: case oStrictHostKeyChecking:
496: intptr = &options->strict_host_key_checking;
1.125 jakob 497: parse_yesnoask:
1.42 provos 498: arg = strdelim(&s);
1.40 ho 499: if (!arg || *arg == '\0')
1.60 stevesk 500: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 501: filename, linenum);
1.17 markus 502: value = 0; /* To avoid compiler warning... */
1.38 provos 503: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 504: value = 1;
1.38 provos 505: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 506: value = 0;
1.38 provos 507: else if (strcmp(arg, "ask") == 0)
1.17 markus 508: value = 2;
509: else
510: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
511: if (*activep && *intptr == -1)
512: *intptr = value;
513: break;
514:
515: case oCompression:
516: intptr = &options->compression;
517: goto parse_flag;
518:
1.126 markus 519: case oTCPKeepAlive:
520: intptr = &options->tcp_keep_alive;
1.17 markus 521: goto parse_flag;
522:
1.91 markus 523: case oNoHostAuthenticationForLocalhost:
524: intptr = &options->no_host_authentication_for_localhost;
525: goto parse_flag;
526:
1.17 markus 527: case oNumberOfPasswordPrompts:
528: intptr = &options->number_of_password_prompts;
529: goto parse_int;
530:
531: case oCompressionLevel:
532: intptr = &options->compression_level;
533: goto parse_int;
534:
1.105 markus 535: case oRekeyLimit:
536: arg = strdelim(&s);
537: if (!arg || *arg == '\0')
538: fatal("%.200s line %d: Missing argument.", filename, linenum);
539: if (arg[0] < '0' || arg[0] > '9')
540: fatal("%.200s line %d: Bad number.", filename, linenum);
1.146 djm 541: orig = val64 = strtoll(arg, &endofnumber, 10);
1.105 markus 542: if (arg == endofnumber)
543: fatal("%.200s line %d: Bad number.", filename, linenum);
544: switch (toupper(*endofnumber)) {
1.146 djm 545: case '\0':
546: scale = 1;
547: break;
1.105 markus 548: case 'K':
1.146 djm 549: scale = 1<<10;
1.105 markus 550: break;
551: case 'M':
1.146 djm 552: scale = 1<<20;
1.105 markus 553: break;
554: case 'G':
1.146 djm 555: scale = 1<<30;
1.105 markus 556: break;
1.146 djm 557: default:
558: fatal("%.200s line %d: Invalid RekeyLimit suffix",
559: filename, linenum);
1.105 markus 560: }
1.146 djm 561: val64 *= scale;
562: /* detect integer wrap and too-large limits */
1.165 djm 563: if ((val64 / scale) != orig || val64 > UINT_MAX)
1.146 djm 564: fatal("%.200s line %d: RekeyLimit too large",
565: filename, linenum);
566: if (val64 < 16)
567: fatal("%.200s line %d: RekeyLimit too small",
568: filename, linenum);
1.165 djm 569: if (*activep && options->rekey_limit == -1)
570: options->rekey_limit = (u_int32_t)val64;
1.105 markus 571: break;
572:
1.17 markus 573: case oIdentityFile:
1.42 provos 574: arg = strdelim(&s);
1.40 ho 575: if (!arg || *arg == '\0')
1.17 markus 576: fatal("%.200s line %d: Missing argument.", filename, linenum);
577: if (*activep) {
1.50 markus 578: intptr = &options->num_identity_files;
1.27 markus 579: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 580: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 581: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.161 stevesk 582: charptr = &options->identity_files[*intptr];
1.38 provos 583: *charptr = xstrdup(arg);
1.27 markus 584: *intptr = *intptr + 1;
1.17 markus 585: }
586: break;
587:
1.34 markus 588: case oXAuthLocation:
589: charptr=&options->xauth_location;
590: goto parse_string;
591:
1.17 markus 592: case oUser:
593: charptr = &options->user;
594: parse_string:
1.42 provos 595: arg = strdelim(&s);
1.40 ho 596: if (!arg || *arg == '\0')
1.17 markus 597: fatal("%.200s line %d: Missing argument.", filename, linenum);
598: if (*activep && *charptr == NULL)
1.38 provos 599: *charptr = xstrdup(arg);
1.17 markus 600: break;
601:
602: case oGlobalKnownHostsFile:
603: charptr = &options->system_hostfile;
604: goto parse_string;
605:
606: case oUserKnownHostsFile:
607: charptr = &options->user_hostfile;
608: goto parse_string;
609:
1.27 markus 610: case oGlobalKnownHostsFile2:
611: charptr = &options->system_hostfile2;
612: goto parse_string;
613:
614: case oUserKnownHostsFile2:
615: charptr = &options->user_hostfile2;
616: goto parse_string;
617:
1.17 markus 618: case oHostName:
619: charptr = &options->hostname;
620: goto parse_string;
621:
1.52 markus 622: case oHostKeyAlias:
623: charptr = &options->host_key_alias;
624: goto parse_string;
625:
1.67 markus 626: case oPreferredAuthentications:
627: charptr = &options->preferred_authentications;
628: goto parse_string;
629:
1.77 markus 630: case oBindAddress:
631: charptr = &options->bind_address;
632: goto parse_string;
633:
1.183 markus 634: case oPKCS11Provider:
635: charptr = &options->pkcs11_provider;
1.86 markus 636: goto parse_string;
1.85 jakob 637:
1.17 markus 638: case oProxyCommand:
1.144 reyk 639: charptr = &options->proxy_command;
640: parse_command:
1.113 markus 641: if (s == NULL)
642: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 643: len = strspn(s, WHITESPACE "=");
1.17 markus 644: if (*activep && *charptr == NULL)
1.102 markus 645: *charptr = xstrdup(s + len);
1.17 markus 646: return 0;
647:
648: case oPort:
649: intptr = &options->port;
650: parse_int:
1.42 provos 651: arg = strdelim(&s);
1.40 ho 652: if (!arg || *arg == '\0')
1.17 markus 653: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 654: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 655: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 656:
657: /* Octal, decimal, or hex format? */
1.38 provos 658: value = strtol(arg, &endofnumber, 0);
659: if (arg == endofnumber)
1.21 markus 660: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 661: if (*activep && *intptr == -1)
662: *intptr = value;
663: break;
664:
665: case oConnectionAttempts:
666: intptr = &options->connection_attempts;
667: goto parse_int;
668:
669: case oCipher:
670: intptr = &options->cipher;
1.42 provos 671: arg = strdelim(&s);
1.40 ho 672: if (!arg || *arg == '\0')
1.32 markus 673: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 674: value = cipher_number(arg);
1.17 markus 675: if (value == -1)
676: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 677: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 678: if (*activep && *intptr == -1)
679: *intptr = value;
680: break;
681:
1.25 markus 682: case oCiphers:
1.42 provos 683: arg = strdelim(&s);
1.40 ho 684: if (!arg || *arg == '\0')
1.32 markus 685: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 686: if (!ciphers_valid(arg))
1.31 markus 687: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 688: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 689: if (*activep && options->ciphers == NULL)
1.38 provos 690: options->ciphers = xstrdup(arg);
1.25 markus 691: break;
692:
1.62 markus 693: case oMacs:
694: arg = strdelim(&s);
695: if (!arg || *arg == '\0')
696: fatal("%.200s line %d: Missing argument.", filename, linenum);
697: if (!mac_valid(arg))
698: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 699: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 700: if (*activep && options->macs == NULL)
701: options->macs = xstrdup(arg);
702: break;
703:
1.189 djm 704: case oKexAlgorithms:
705: arg = strdelim(&s);
706: if (!arg || *arg == '\0')
707: fatal("%.200s line %d: Missing argument.",
708: filename, linenum);
709: if (!kex_names_valid(arg))
710: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
711: filename, linenum, arg ? arg : "<NONE>");
712: if (*activep && options->kex_algorithms == NULL)
713: options->kex_algorithms = xstrdup(arg);
714: break;
715:
1.76 markus 716: case oHostKeyAlgorithms:
717: arg = strdelim(&s);
718: if (!arg || *arg == '\0')
719: fatal("%.200s line %d: Missing argument.", filename, linenum);
720: if (!key_names_valid2(arg))
721: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 722: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 723: if (*activep && options->hostkeyalgorithms == NULL)
724: options->hostkeyalgorithms = xstrdup(arg);
725: break;
726:
1.25 markus 727: case oProtocol:
728: intptr = &options->protocol;
1.42 provos 729: arg = strdelim(&s);
1.40 ho 730: if (!arg || *arg == '\0')
1.32 markus 731: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 732: value = proto_spec(arg);
1.25 markus 733: if (value == SSH_PROTO_UNKNOWN)
734: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 735: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 736: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
737: *intptr = value;
738: break;
739:
1.17 markus 740: case oLogLevel:
1.164 dtucker 741: log_level_ptr = &options->log_level;
1.42 provos 742: arg = strdelim(&s);
1.38 provos 743: value = log_level_number(arg);
1.95 markus 744: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 745: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 746: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 747: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
748: *log_level_ptr = (LogLevel) value;
1.17 markus 749: break;
750:
1.88 stevesk 751: case oLocalForward:
1.17 markus 752: case oRemoteForward:
1.168 stevesk 753: case oDynamicForward:
1.42 provos 754: arg = strdelim(&s);
1.135 djm 755: if (arg == NULL || *arg == '\0')
1.88 stevesk 756: fatal("%.200s line %d: Missing port argument.",
757: filename, linenum);
1.135 djm 758:
1.168 stevesk 759: if (opcode == oLocalForward ||
760: opcode == oRemoteForward) {
761: arg2 = strdelim(&s);
762: if (arg2 == NULL || *arg2 == '\0')
763: fatal("%.200s line %d: Missing target argument.",
764: filename, linenum);
1.135 djm 765:
1.168 stevesk 766: /* construct a string for parse_forward */
767: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
768: } else if (opcode == oDynamicForward) {
769: strlcpy(fwdarg, arg, sizeof(fwdarg));
770: }
771:
772: if (parse_forward(&fwd, fwdarg,
1.176 djm 773: opcode == oDynamicForward ? 1 : 0,
774: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 775: fatal("%.200s line %d: Bad forwarding specification.",
776: filename, linenum);
1.135 djm 777:
1.88 stevesk 778: if (*activep) {
1.168 stevesk 779: if (opcode == oLocalForward ||
780: opcode == oDynamicForward)
1.135 djm 781: add_local_forward(options, &fwd);
1.88 stevesk 782: else if (opcode == oRemoteForward)
1.135 djm 783: add_remote_forward(options, &fwd);
1.88 stevesk 784: }
1.17 markus 785: break;
1.71 markus 786:
1.90 stevesk 787: case oClearAllForwardings:
788: intptr = &options->clear_forwardings;
789: goto parse_flag;
790:
1.17 markus 791: case oHost:
792: *activep = 0;
1.191 djm 793: arg2 = NULL;
794: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
795: negated = *arg == '!';
796: if (negated)
797: arg++;
1.38 provos 798: if (match_pattern(host, arg)) {
1.191 djm 799: if (negated) {
800: debug("%.200s line %d: Skipping Host "
801: "block because of negated match "
802: "for %.100s", filename, linenum,
803: arg);
804: *activep = 0;
805: break;
806: }
807: if (!*activep)
808: arg2 = arg; /* logged below */
1.17 markus 809: *activep = 1;
810: }
1.191 djm 811: }
812: if (*activep)
813: debug("%.200s line %d: Applying options for %.100s",
814: filename, linenum, arg2);
1.42 provos 815: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 816: return 0;
817:
818: case oEscapeChar:
819: intptr = &options->escape_char;
1.42 provos 820: arg = strdelim(&s);
1.40 ho 821: if (!arg || *arg == '\0')
1.17 markus 822: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 823: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 824: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
825: value = (u_char) arg[1] & 31;
1.38 provos 826: else if (strlen(arg) == 1)
1.51 markus 827: value = (u_char) arg[0];
1.38 provos 828: else if (strcmp(arg, "none") == 0)
1.79 stevesk 829: value = SSH_ESCAPECHAR_NONE;
1.17 markus 830: else {
831: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 832: filename, linenum);
1.17 markus 833: /* NOTREACHED */
834: value = 0; /* Avoid compiler warning. */
835: }
836: if (*activep && *intptr == -1)
837: *intptr = value;
1.112 djm 838: break;
839:
840: case oAddressFamily:
841: arg = strdelim(&s);
1.140 markus 842: if (!arg || *arg == '\0')
843: fatal("%s line %d: missing address family.",
844: filename, linenum);
1.114 djm 845: intptr = &options->address_family;
1.112 djm 846: if (strcasecmp(arg, "inet") == 0)
1.114 djm 847: value = AF_INET;
1.112 djm 848: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 849: value = AF_INET6;
1.112 djm 850: else if (strcasecmp(arg, "any") == 0)
1.114 djm 851: value = AF_UNSPEC;
1.112 djm 852: else
853: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 854: if (*activep && *intptr == -1)
855: *intptr = value;
1.17 markus 856: break;
857:
1.101 markus 858: case oEnableSSHKeysign:
859: intptr = &options->enable_ssh_keysign;
860: goto parse_flag;
861:
1.128 markus 862: case oIdentitiesOnly:
863: intptr = &options->identities_only;
864: goto parse_flag;
865:
1.127 markus 866: case oServerAliveInterval:
867: intptr = &options->server_alive_interval;
868: goto parse_time;
869:
870: case oServerAliveCountMax:
871: intptr = &options->server_alive_count_max;
872: goto parse_int;
873:
1.130 djm 874: case oSendEnv:
875: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
876: if (strchr(arg, '=') != NULL)
877: fatal("%s line %d: Invalid environment name.",
878: filename, linenum);
1.137 djm 879: if (!*activep)
880: continue;
1.130 djm 881: if (options->num_send_env >= MAX_SEND_ENV)
882: fatal("%s line %d: too many send env.",
883: filename, linenum);
884: options->send_env[options->num_send_env++] =
885: xstrdup(arg);
886: }
887: break;
888:
1.132 djm 889: case oControlPath:
890: charptr = &options->control_path;
891: goto parse_string;
892:
893: case oControlMaster:
894: intptr = &options->control_master;
1.141 djm 895: arg = strdelim(&s);
896: if (!arg || *arg == '\0')
897: fatal("%.200s line %d: Missing ControlMaster argument.",
898: filename, linenum);
899: value = 0; /* To avoid compiler warning... */
900: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
901: value = SSHCTL_MASTER_YES;
902: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
903: value = SSHCTL_MASTER_NO;
904: else if (strcmp(arg, "auto") == 0)
905: value = SSHCTL_MASTER_AUTO;
906: else if (strcmp(arg, "ask") == 0)
907: value = SSHCTL_MASTER_ASK;
908: else if (strcmp(arg, "autoask") == 0)
909: value = SSHCTL_MASTER_AUTO_ASK;
910: else
911: fatal("%.200s line %d: Bad ControlMaster argument.",
912: filename, linenum);
913: if (*activep && *intptr == -1)
914: *intptr = value;
915: break;
1.132 djm 916:
1.187 djm 917: case oControlPersist:
918: /* no/false/yes/true, or a time spec */
919: intptr = &options->control_persist;
920: arg = strdelim(&s);
921: if (!arg || *arg == '\0')
922: fatal("%.200s line %d: Missing ControlPersist"
923: " argument.", filename, linenum);
924: value = 0;
925: value2 = 0; /* timeout */
926: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
927: value = 0;
928: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
929: value = 1;
930: else if ((value2 = convtime(arg)) >= 0)
931: value = 1;
932: else
933: fatal("%.200s line %d: Bad ControlPersist argument.",
934: filename, linenum);
935: if (*activep && *intptr == -1) {
936: *intptr = value;
937: options->control_persist_timeout = value2;
938: }
939: break;
940:
1.136 djm 941: case oHashKnownHosts:
942: intptr = &options->hash_known_hosts;
943: goto parse_flag;
944:
1.144 reyk 945: case oTunnel:
946: intptr = &options->tun_open;
1.145 reyk 947: arg = strdelim(&s);
948: if (!arg || *arg == '\0')
949: fatal("%s line %d: Missing yes/point-to-point/"
950: "ethernet/no argument.", filename, linenum);
951: value = 0; /* silence compiler */
952: if (strcasecmp(arg, "ethernet") == 0)
953: value = SSH_TUNMODE_ETHERNET;
954: else if (strcasecmp(arg, "point-to-point") == 0)
955: value = SSH_TUNMODE_POINTOPOINT;
956: else if (strcasecmp(arg, "yes") == 0)
957: value = SSH_TUNMODE_DEFAULT;
958: else if (strcasecmp(arg, "no") == 0)
959: value = SSH_TUNMODE_NO;
960: else
961: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
962: "no argument: %s", filename, linenum, arg);
963: if (*activep)
964: *intptr = value;
965: break;
1.144 reyk 966:
967: case oTunnelDevice:
968: arg = strdelim(&s);
969: if (!arg || *arg == '\0')
970: fatal("%.200s line %d: Missing argument.", filename, linenum);
971: value = a2tun(arg, &value2);
1.145 reyk 972: if (value == SSH_TUNID_ERR)
1.144 reyk 973: fatal("%.200s line %d: Bad tun device.", filename, linenum);
974: if (*activep) {
975: options->tun_local = value;
976: options->tun_remote = value2;
977: }
978: break;
979:
980: case oLocalCommand:
981: charptr = &options->local_command;
982: goto parse_command;
983:
984: case oPermitLocalCommand:
985: intptr = &options->permit_local_command;
986: goto parse_flag;
987:
1.167 grunk 988: case oVisualHostKey:
989: intptr = &options->visual_host_key;
990: goto parse_flag;
991:
1.190 djm 992: case oIPQoS:
993: arg = strdelim(&s);
994: if ((value = parse_ipqos(arg)) == -1)
995: fatal("%s line %d: Bad IPQoS value: %s",
996: filename, linenum, arg);
997: arg = strdelim(&s);
998: if (arg == NULL)
999: value2 = value;
1000: else if ((value2 = parse_ipqos(arg)) == -1)
1001: fatal("%s line %d: Bad IPQoS value: %s",
1002: filename, linenum, arg);
1003: if (*activep) {
1004: options->ip_qos_interactive = value;
1005: options->ip_qos_bulk = value2;
1006: }
1007: break;
1008:
1.177 andreas 1009: case oUseRoaming:
1010: intptr = &options->use_roaming;
1011: goto parse_flag;
1012:
1.192 ! djm 1013: case oRequestTTY:
! 1014: arg = strdelim(&s);
! 1015: if (!arg || *arg == '\0')
! 1016: fatal("%s line %d: missing argument.",
! 1017: filename, linenum);
! 1018: intptr = &options->request_tty;
! 1019: if (strcasecmp(arg, "yes") == 0)
! 1020: value = REQUEST_TTY_YES;
! 1021: else if (strcasecmp(arg, "no") == 0)
! 1022: value = REQUEST_TTY_NO;
! 1023: else if (strcasecmp(arg, "force") == 0)
! 1024: value = REQUEST_TTY_FORCE;
! 1025: else if (strcasecmp(arg, "auto") == 0)
! 1026: value = REQUEST_TTY_AUTO;
! 1027: else
! 1028: fatal("Unsupported RequestTTY \"%s\"", arg);
! 1029: if (*activep && *intptr == -1)
! 1030: *intptr = value;
! 1031: break;
! 1032:
1.96 markus 1033: case oDeprecated:
1.98 markus 1034: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1035: filename, linenum, keyword);
1.98 markus 1036: return 0;
1.96 markus 1037:
1.110 jakob 1038: case oUnsupported:
1039: error("%s line %d: Unsupported option \"%s\"",
1040: filename, linenum, keyword);
1041: return 0;
1042:
1.17 markus 1043: default:
1044: fatal("process_config_line: Unimplemented opcode %d", opcode);
1045: }
1046:
1047: /* Check that there is no garbage at end of line. */
1.57 djm 1048: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1049: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1050: filename, linenum, arg);
1.39 ho 1051: }
1.17 markus 1052: return 0;
1.1 deraadt 1053: }
1054:
1055:
1.19 markus 1056: /*
1057: * Reads the config file and modifies the options accordingly. Options
1058: * should already be initialized before this call. This never returns if
1.89 stevesk 1059: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1060: */
1.1 deraadt 1061:
1.89 stevesk 1062: int
1.134 deraadt 1063: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 1064: int checkperm)
1.1 deraadt 1065: {
1.17 markus 1066: FILE *f;
1067: char line[1024];
1068: int active, linenum;
1069: int bad_options = 0;
1070:
1.129 djm 1071: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1072: return 0;
1.129 djm 1073:
1074: if (checkperm) {
1075: struct stat sb;
1.134 deraadt 1076:
1.131 dtucker 1077: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1078: fatal("fstat %s: %s", filename, strerror(errno));
1079: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1080: (sb.st_mode & 022) != 0))
1.129 djm 1081: fatal("Bad owner or permissions on %s", filename);
1082: }
1.17 markus 1083:
1084: debug("Reading configuration data %.200s", filename);
1085:
1.19 markus 1086: /*
1087: * Mark that we are now processing the options. This flag is turned
1088: * on/off by Host specifications.
1089: */
1.17 markus 1090: active = 1;
1091: linenum = 0;
1092: while (fgets(line, sizeof(line), f)) {
1093: /* Update line number counter. */
1094: linenum++;
1095: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
1096: bad_options++;
1097: }
1098: fclose(f);
1099: if (bad_options > 0)
1.64 millert 1100: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1101: filename, bad_options);
1.89 stevesk 1102: return 1;
1.1 deraadt 1103: }
1104:
1.19 markus 1105: /*
1106: * Initializes options to special values that indicate that they have not yet
1107: * been set. Read_config_file will only set options with this value. Options
1108: * are processed in the following order: command line, user config file,
1109: * system config file. Last, fill_default_options is called.
1110: */
1.1 deraadt 1111:
1.26 markus 1112: void
1.17 markus 1113: initialize_options(Options * options)
1.1 deraadt 1114: {
1.17 markus 1115: memset(options, 'X', sizeof(*options));
1116: options->forward_agent = -1;
1117: options->forward_x11 = -1;
1.123 markus 1118: options->forward_x11_trusted = -1;
1.186 djm 1119: options->forward_x11_timeout = -1;
1.153 markus 1120: options->exit_on_forward_failure = -1;
1.34 markus 1121: options->xauth_location = NULL;
1.17 markus 1122: options->gateway_ports = -1;
1123: options->use_privileged_port = -1;
1124: options->rsa_authentication = -1;
1.50 markus 1125: options->pubkey_authentication = -1;
1.78 markus 1126: options->challenge_response_authentication = -1;
1.118 markus 1127: options->gss_authentication = -1;
1128: options->gss_deleg_creds = -1;
1.17 markus 1129: options->password_authentication = -1;
1.48 markus 1130: options->kbd_interactive_authentication = -1;
1131: options->kbd_interactive_devices = NULL;
1.17 markus 1132: options->rhosts_rsa_authentication = -1;
1.72 markus 1133: options->hostbased_authentication = -1;
1.17 markus 1134: options->batch_mode = -1;
1135: options->check_host_ip = -1;
1136: options->strict_host_key_checking = -1;
1137: options->compression = -1;
1.126 markus 1138: options->tcp_keep_alive = -1;
1.17 markus 1139: options->compression_level = -1;
1140: options->port = -1;
1.114 djm 1141: options->address_family = -1;
1.17 markus 1142: options->connection_attempts = -1;
1.111 djm 1143: options->connection_timeout = -1;
1.17 markus 1144: options->number_of_password_prompts = -1;
1145: options->cipher = -1;
1.25 markus 1146: options->ciphers = NULL;
1.62 markus 1147: options->macs = NULL;
1.189 djm 1148: options->kex_algorithms = NULL;
1.76 markus 1149: options->hostkeyalgorithms = NULL;
1.25 markus 1150: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1151: options->num_identity_files = 0;
1152: options->hostname = NULL;
1.52 markus 1153: options->host_key_alias = NULL;
1.17 markus 1154: options->proxy_command = NULL;
1155: options->user = NULL;
1156: options->escape_char = -1;
1157: options->system_hostfile = NULL;
1158: options->user_hostfile = NULL;
1.27 markus 1159: options->system_hostfile2 = NULL;
1160: options->user_hostfile2 = NULL;
1.185 djm 1161: options->local_forwards = NULL;
1.17 markus 1162: options->num_local_forwards = 0;
1.185 djm 1163: options->remote_forwards = NULL;
1.17 markus 1164: options->num_remote_forwards = 0;
1.90 stevesk 1165: options->clear_forwardings = -1;
1.95 markus 1166: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1167: options->preferred_authentications = NULL;
1.77 markus 1168: options->bind_address = NULL;
1.183 markus 1169: options->pkcs11_provider = NULL;
1.101 markus 1170: options->enable_ssh_keysign = - 1;
1.91 markus 1171: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1172: options->identities_only = - 1;
1.105 markus 1173: options->rekey_limit = - 1;
1.107 jakob 1174: options->verify_host_key_dns = -1;
1.127 markus 1175: options->server_alive_interval = -1;
1176: options->server_alive_count_max = -1;
1.130 djm 1177: options->num_send_env = 0;
1.132 djm 1178: options->control_path = NULL;
1179: options->control_master = -1;
1.187 djm 1180: options->control_persist = -1;
1181: options->control_persist_timeout = 0;
1.136 djm 1182: options->hash_known_hosts = -1;
1.144 reyk 1183: options->tun_open = -1;
1184: options->tun_local = -1;
1185: options->tun_remote = -1;
1186: options->local_command = NULL;
1187: options->permit_local_command = -1;
1.177 andreas 1188: options->use_roaming = -1;
1.167 grunk 1189: options->visual_host_key = -1;
1.171 djm 1190: options->zero_knowledge_password_authentication = -1;
1.190 djm 1191: options->ip_qos_interactive = -1;
1192: options->ip_qos_bulk = -1;
1.192 ! djm 1193: options->request_tty = -1;
1.1 deraadt 1194: }
1195:
1.19 markus 1196: /*
1197: * Called after processing other sources of option data, this fills those
1198: * options for which no value has been specified with their default values.
1199: */
1.1 deraadt 1200:
1.26 markus 1201: void
1.17 markus 1202: fill_default_options(Options * options)
1.1 deraadt 1203: {
1.61 deraadt 1204: int len;
1205:
1.17 markus 1206: if (options->forward_agent == -1)
1.33 markus 1207: options->forward_agent = 0;
1.17 markus 1208: if (options->forward_x11 == -1)
1.23 markus 1209: options->forward_x11 = 0;
1.123 markus 1210: if (options->forward_x11_trusted == -1)
1211: options->forward_x11_trusted = 0;
1.186 djm 1212: if (options->forward_x11_timeout == -1)
1213: options->forward_x11_timeout = 1200;
1.153 markus 1214: if (options->exit_on_forward_failure == -1)
1215: options->exit_on_forward_failure = 0;
1.34 markus 1216: if (options->xauth_location == NULL)
1.80 markus 1217: options->xauth_location = _PATH_XAUTH;
1.17 markus 1218: if (options->gateway_ports == -1)
1219: options->gateway_ports = 0;
1220: if (options->use_privileged_port == -1)
1.65 markus 1221: options->use_privileged_port = 0;
1.17 markus 1222: if (options->rsa_authentication == -1)
1223: options->rsa_authentication = 1;
1.50 markus 1224: if (options->pubkey_authentication == -1)
1225: options->pubkey_authentication = 1;
1.78 markus 1226: if (options->challenge_response_authentication == -1)
1.83 markus 1227: options->challenge_response_authentication = 1;
1.118 markus 1228: if (options->gss_authentication == -1)
1.122 markus 1229: options->gss_authentication = 0;
1.118 markus 1230: if (options->gss_deleg_creds == -1)
1231: options->gss_deleg_creds = 0;
1.17 markus 1232: if (options->password_authentication == -1)
1233: options->password_authentication = 1;
1.48 markus 1234: if (options->kbd_interactive_authentication == -1)
1.59 markus 1235: options->kbd_interactive_authentication = 1;
1.17 markus 1236: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1237: options->rhosts_rsa_authentication = 0;
1.72 markus 1238: if (options->hostbased_authentication == -1)
1239: options->hostbased_authentication = 0;
1.17 markus 1240: if (options->batch_mode == -1)
1241: options->batch_mode = 0;
1242: if (options->check_host_ip == -1)
1243: options->check_host_ip = 1;
1244: if (options->strict_host_key_checking == -1)
1245: options->strict_host_key_checking = 2; /* 2 is default */
1246: if (options->compression == -1)
1247: options->compression = 0;
1.126 markus 1248: if (options->tcp_keep_alive == -1)
1249: options->tcp_keep_alive = 1;
1.17 markus 1250: if (options->compression_level == -1)
1251: options->compression_level = 6;
1252: if (options->port == -1)
1253: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1254: if (options->address_family == -1)
1255: options->address_family = AF_UNSPEC;
1.17 markus 1256: if (options->connection_attempts == -1)
1.84 markus 1257: options->connection_attempts = 1;
1.17 markus 1258: if (options->number_of_password_prompts == -1)
1259: options->number_of_password_prompts = 3;
1260: /* Selected in ssh_login(). */
1261: if (options->cipher == -1)
1262: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1263: /* options->ciphers, default set in myproposals.h */
1.62 markus 1264: /* options->macs, default set in myproposals.h */
1.189 djm 1265: /* options->kex_algorithms, default set in myproposals.h */
1.76 markus 1266: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1267: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1268: options->protocol = SSH_PROTO_2;
1.17 markus 1269: if (options->num_identity_files == 0) {
1.50 markus 1270: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1271: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1272: options->identity_files[options->num_identity_files] =
1.61 deraadt 1273: xmalloc(len);
1274: snprintf(options->identity_files[options->num_identity_files++],
1275: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1276: }
1277: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1278: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1279: options->identity_files[options->num_identity_files] =
1280: xmalloc(len);
1281: snprintf(options->identity_files[options->num_identity_files++],
1282: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1283:
1.61 deraadt 1284: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1285: options->identity_files[options->num_identity_files] =
1.61 deraadt 1286: xmalloc(len);
1287: snprintf(options->identity_files[options->num_identity_files++],
1288: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.188 djm 1289:
1290: len = 2 + strlen(_PATH_SSH_CLIENT_ID_ECDSA) + 1;
1291: options->identity_files[options->num_identity_files] =
1292: xmalloc(len);
1293: snprintf(options->identity_files[options->num_identity_files++],
1294: len, "~/%.100s", _PATH_SSH_CLIENT_ID_ECDSA);
1.50 markus 1295: }
1.27 markus 1296: }
1.17 markus 1297: if (options->escape_char == -1)
1298: options->escape_char = '~';
1299: if (options->system_hostfile == NULL)
1.55 markus 1300: options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
1.17 markus 1301: if (options->user_hostfile == NULL)
1.55 markus 1302: options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
1.27 markus 1303: if (options->system_hostfile2 == NULL)
1.55 markus 1304: options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
1.27 markus 1305: if (options->user_hostfile2 == NULL)
1.55 markus 1306: options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
1.95 markus 1307: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1308: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1309: if (options->clear_forwardings == 1)
1310: clear_forwardings(options);
1.91 markus 1311: if (options->no_host_authentication_for_localhost == - 1)
1312: options->no_host_authentication_for_localhost = 0;
1.128 markus 1313: if (options->identities_only == -1)
1314: options->identities_only = 0;
1.101 markus 1315: if (options->enable_ssh_keysign == -1)
1316: options->enable_ssh_keysign = 0;
1.105 markus 1317: if (options->rekey_limit == -1)
1318: options->rekey_limit = 0;
1.107 jakob 1319: if (options->verify_host_key_dns == -1)
1320: options->verify_host_key_dns = 0;
1.127 markus 1321: if (options->server_alive_interval == -1)
1322: options->server_alive_interval = 0;
1323: if (options->server_alive_count_max == -1)
1324: options->server_alive_count_max = 3;
1.132 djm 1325: if (options->control_master == -1)
1326: options->control_master = 0;
1.187 djm 1327: if (options->control_persist == -1) {
1328: options->control_persist = 0;
1329: options->control_persist_timeout = 0;
1330: }
1.136 djm 1331: if (options->hash_known_hosts == -1)
1332: options->hash_known_hosts = 0;
1.144 reyk 1333: if (options->tun_open == -1)
1.145 reyk 1334: options->tun_open = SSH_TUNMODE_NO;
1335: if (options->tun_local == -1)
1336: options->tun_local = SSH_TUNID_ANY;
1337: if (options->tun_remote == -1)
1338: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1339: if (options->permit_local_command == -1)
1340: options->permit_local_command = 0;
1.177 andreas 1341: if (options->use_roaming == -1)
1342: options->use_roaming = 1;
1.167 grunk 1343: if (options->visual_host_key == -1)
1344: options->visual_host_key = 0;
1.171 djm 1345: if (options->zero_knowledge_password_authentication == -1)
1346: options->zero_knowledge_password_authentication = 0;
1.190 djm 1347: if (options->ip_qos_interactive == -1)
1348: options->ip_qos_interactive = IPTOS_LOWDELAY;
1349: if (options->ip_qos_bulk == -1)
1350: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 ! djm 1351: if (options->request_tty == -1)
! 1352: options->request_tty = REQUEST_TTY_AUTO;
1.144 reyk 1353: /* options->local_command should not be set by default */
1.17 markus 1354: /* options->proxy_command should not be set by default */
1355: /* options->user will be set in the main program if appropriate */
1356: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1357: /* options->host_key_alias should not be set by default */
1.67 markus 1358: /* options->preferred_authentications will be set in ssh */
1.135 djm 1359: }
1360:
1361: /*
1362: * parse_forward
1363: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 1364: * dynamicfwd == 0
1.135 djm 1365: * [listenhost:]listenport:connecthost:connectport
1.168 stevesk 1366: * dynamicfwd == 1
1367: * [listenhost:]listenport
1.135 djm 1368: * returns number of arguments parsed or zero on error
1369: */
1370: int
1.176 djm 1371: parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 1372: {
1373: int i;
1374: char *p, *cp, *fwdarg[4];
1375:
1376: memset(fwd, '\0', sizeof(*fwd));
1377:
1378: cp = p = xstrdup(fwdspec);
1379:
1380: /* skip leading spaces */
1.162 tedu 1381: while (isspace(*cp))
1.135 djm 1382: cp++;
1383:
1384: for (i = 0; i < 4; ++i)
1385: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1386: break;
1387:
1.170 stevesk 1388: /* Check for trailing garbage */
1.135 djm 1389: if (cp != NULL)
1390: i = 0; /* failure */
1391:
1392: switch (i) {
1.168 stevesk 1393: case 1:
1394: fwd->listen_host = NULL;
1395: fwd->listen_port = a2port(fwdarg[0]);
1396: fwd->connect_host = xstrdup("socks");
1397: break;
1398:
1399: case 2:
1400: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1401: fwd->listen_port = a2port(fwdarg[1]);
1402: fwd->connect_host = xstrdup("socks");
1403: break;
1404:
1.135 djm 1405: case 3:
1406: fwd->listen_host = NULL;
1407: fwd->listen_port = a2port(fwdarg[0]);
1408: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1409: fwd->connect_port = a2port(fwdarg[2]);
1410: break;
1411:
1412: case 4:
1413: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1414: fwd->listen_port = a2port(fwdarg[1]);
1415: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1416: fwd->connect_port = a2port(fwdarg[3]);
1417: break;
1418: default:
1419: i = 0; /* failure */
1420: }
1421:
1422: xfree(p);
1423:
1.168 stevesk 1424: if (dynamicfwd) {
1425: if (!(i == 1 || i == 2))
1426: goto fail_free;
1427: } else {
1428: if (!(i == 3 || i == 4))
1429: goto fail_free;
1.175 djm 1430: if (fwd->connect_port <= 0)
1.168 stevesk 1431: goto fail_free;
1432: }
1433:
1.176 djm 1434: if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0))
1.135 djm 1435: goto fail_free;
1436:
1437: if (fwd->connect_host != NULL &&
1438: strlen(fwd->connect_host) >= NI_MAXHOST)
1439: goto fail_free;
1.176 djm 1440: if (fwd->listen_host != NULL &&
1441: strlen(fwd->listen_host) >= NI_MAXHOST)
1442: goto fail_free;
1443:
1.135 djm 1444:
1445: return (i);
1446:
1447: fail_free:
1.173 djm 1448: if (fwd->connect_host != NULL) {
1.135 djm 1449: xfree(fwd->connect_host);
1.173 djm 1450: fwd->connect_host = NULL;
1451: }
1452: if (fwd->listen_host != NULL) {
1.135 djm 1453: xfree(fwd->listen_host);
1.173 djm 1454: fwd->listen_host = NULL;
1455: }
1.135 djm 1456: return (0);
1.1 deraadt 1457: }
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