Annotation of src/usr.bin/ssh/readconf.c, Revision 1.194
1.194 ! markus 1: /* $OpenBSD: readconf.c,v 1.193 2011/05/24 07:15:47 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 },
1.193 djm 193: { "globalknownhostsfile2", oDeprecated },
1.174 stevesk 194: { "userknownhostsfile", oUserKnownHostsFile },
1.193 djm 195: { "userknownhostsfile2", oDeprecated },
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;
1.194 ! markus 293: fwd->handle = newfwd->handle;
1.184 markus 294: fwd->allocated_port = 0;
1.1 deraadt 295: }
296:
1.90 stevesk 297: static void
298: clear_forwardings(Options *options)
299: {
300: int i;
301:
1.135 djm 302: for (i = 0; i < options->num_local_forwards; i++) {
1.138 dtucker 303: if (options->local_forwards[i].listen_host != NULL)
304: xfree(options->local_forwards[i].listen_host);
1.135 djm 305: xfree(options->local_forwards[i].connect_host);
306: }
1.185 djm 307: if (options->num_local_forwards > 0) {
308: xfree(options->local_forwards);
309: options->local_forwards = NULL;
310: }
1.90 stevesk 311: options->num_local_forwards = 0;
1.135 djm 312: for (i = 0; i < options->num_remote_forwards; i++) {
1.138 dtucker 313: if (options->remote_forwards[i].listen_host != NULL)
314: xfree(options->remote_forwards[i].listen_host);
1.135 djm 315: xfree(options->remote_forwards[i].connect_host);
316: }
1.185 djm 317: if (options->num_remote_forwards > 0) {
318: xfree(options->remote_forwards);
319: options->remote_forwards = NULL;
320: }
1.90 stevesk 321: options->num_remote_forwards = 0;
1.145 reyk 322: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 323: }
324:
1.19 markus 325: /*
1.70 stevesk 326: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 327: */
1.1 deraadt 328:
1.26 markus 329: static OpCodes
1.17 markus 330: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 331: {
1.51 markus 332: u_int i;
1.1 deraadt 333:
1.17 markus 334: for (i = 0; keywords[i].name; i++)
1.20 markus 335: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 336: return keywords[i].opcode;
337:
1.75 stevesk 338: error("%s: line %d: Bad configuration option: %s",
339: filename, linenum, cp);
1.17 markus 340: return oBadOption;
1.1 deraadt 341: }
342:
1.19 markus 343: /*
344: * Processes a single option line as used in the configuration files. This
345: * only sets those values that have not already been set.
346: */
1.102 markus 347: #define WHITESPACE " \t\r\n"
1.1 deraadt 348:
1.14 markus 349: int
350: process_config_line(Options *options, const char *host,
1.17 markus 351: char *line, const char *filename, int linenum,
352: int *activep)
1.1 deraadt 353: {
1.193 djm 354: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
355: char **cpptr, fwdarg[256];
356: u_int *uintptr, max_entries = 0;
1.191 djm 357: int negated, opcode, *intptr, value, value2, scale;
1.164 dtucker 358: LogLevel *log_level_ptr;
1.146 djm 359: long long orig, val64;
1.102 markus 360: size_t len;
1.135 djm 361: Forward fwd;
1.106 djm 362:
363: /* Strip trailing whitespace */
1.139 deraadt 364: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 365: if (strchr(WHITESPACE, line[len]) == NULL)
366: break;
367: line[len] = '\0';
368: }
1.1 deraadt 369:
1.42 provos 370: s = line;
371: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 372: if ((keyword = strdelim(&s)) == NULL)
373: return 0;
1.42 provos 374: /* Ignore leading whitespace. */
375: if (*keyword == '\0')
1.43 markus 376: keyword = strdelim(&s);
1.56 deraadt 377: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 378: return 0;
379:
1.38 provos 380: opcode = parse_token(keyword, filename, linenum);
1.17 markus 381:
382: switch (opcode) {
383: case oBadOption:
1.19 markus 384: /* don't panic, but count bad options */
385: return -1;
1.17 markus 386: /* NOTREACHED */
1.111 djm 387: case oConnectTimeout:
388: intptr = &options->connection_timeout;
1.127 markus 389: parse_time:
1.111 djm 390: arg = strdelim(&s);
391: if (!arg || *arg == '\0')
392: fatal("%s line %d: missing time value.",
393: filename, linenum);
394: if ((value = convtime(arg)) == -1)
395: fatal("%s line %d: invalid time value.",
396: filename, linenum);
1.160 dtucker 397: if (*activep && *intptr == -1)
1.111 djm 398: *intptr = value;
399: break;
400:
1.17 markus 401: case oForwardAgent:
402: intptr = &options->forward_agent;
403: parse_flag:
1.42 provos 404: arg = strdelim(&s);
1.40 ho 405: if (!arg || *arg == '\0')
1.17 markus 406: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
407: value = 0; /* To avoid compiler warning... */
1.38 provos 408: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 409: value = 1;
1.38 provos 410: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 411: value = 0;
412: else
413: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
414: if (*activep && *intptr == -1)
415: *intptr = value;
416: break;
417:
418: case oForwardX11:
419: intptr = &options->forward_x11;
420: goto parse_flag;
421:
1.123 markus 422: case oForwardX11Trusted:
423: intptr = &options->forward_x11_trusted;
424: goto parse_flag;
1.186 djm 425:
426: case oForwardX11Timeout:
427: intptr = &options->forward_x11_timeout;
428: goto parse_time;
1.123 markus 429:
1.17 markus 430: case oGatewayPorts:
431: intptr = &options->gateway_ports;
432: goto parse_flag;
433:
1.153 markus 434: case oExitOnForwardFailure:
435: intptr = &options->exit_on_forward_failure;
436: goto parse_flag;
437:
1.17 markus 438: case oUsePrivilegedPort:
439: intptr = &options->use_privileged_port;
440: goto parse_flag;
441:
442: case oPasswordAuthentication:
443: intptr = &options->password_authentication;
444: goto parse_flag;
445:
1.171 djm 446: case oZeroKnowledgePasswordAuthentication:
447: intptr = &options->zero_knowledge_password_authentication;
448: goto parse_flag;
449:
1.48 markus 450: case oKbdInteractiveAuthentication:
451: intptr = &options->kbd_interactive_authentication;
452: goto parse_flag;
453:
454: case oKbdInteractiveDevices:
455: charptr = &options->kbd_interactive_devices;
456: goto parse_string;
457:
1.50 markus 458: case oPubkeyAuthentication:
459: intptr = &options->pubkey_authentication;
1.30 markus 460: goto parse_flag;
461:
1.17 markus 462: case oRSAAuthentication:
463: intptr = &options->rsa_authentication;
464: goto parse_flag;
465:
466: case oRhostsRSAAuthentication:
467: intptr = &options->rhosts_rsa_authentication;
468: goto parse_flag;
469:
1.72 markus 470: case oHostbasedAuthentication:
471: intptr = &options->hostbased_authentication;
472: goto parse_flag;
473:
1.59 markus 474: case oChallengeResponseAuthentication:
1.78 markus 475: intptr = &options->challenge_response_authentication;
1.17 markus 476: goto parse_flag;
1.108 jakob 477:
1.118 markus 478: case oGssAuthentication:
479: intptr = &options->gss_authentication;
480: goto parse_flag;
481:
482: case oGssDelegateCreds:
483: intptr = &options->gss_deleg_creds;
484: goto parse_flag;
485:
1.17 markus 486: case oBatchMode:
487: intptr = &options->batch_mode;
488: goto parse_flag;
489:
490: case oCheckHostIP:
491: intptr = &options->check_host_ip;
1.167 grunk 492: goto parse_flag;
1.17 markus 493:
1.107 jakob 494: case oVerifyHostKeyDNS:
495: intptr = &options->verify_host_key_dns;
1.125 jakob 496: goto parse_yesnoask;
1.107 jakob 497:
1.17 markus 498: case oStrictHostKeyChecking:
499: intptr = &options->strict_host_key_checking;
1.125 jakob 500: parse_yesnoask:
1.42 provos 501: arg = strdelim(&s);
1.40 ho 502: if (!arg || *arg == '\0')
1.60 stevesk 503: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 504: filename, linenum);
1.17 markus 505: value = 0; /* To avoid compiler warning... */
1.38 provos 506: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 507: value = 1;
1.38 provos 508: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 509: value = 0;
1.38 provos 510: else if (strcmp(arg, "ask") == 0)
1.17 markus 511: value = 2;
512: else
513: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
514: if (*activep && *intptr == -1)
515: *intptr = value;
516: break;
517:
518: case oCompression:
519: intptr = &options->compression;
520: goto parse_flag;
521:
1.126 markus 522: case oTCPKeepAlive:
523: intptr = &options->tcp_keep_alive;
1.17 markus 524: goto parse_flag;
525:
1.91 markus 526: case oNoHostAuthenticationForLocalhost:
527: intptr = &options->no_host_authentication_for_localhost;
528: goto parse_flag;
529:
1.17 markus 530: case oNumberOfPasswordPrompts:
531: intptr = &options->number_of_password_prompts;
532: goto parse_int;
533:
534: case oCompressionLevel:
535: intptr = &options->compression_level;
536: goto parse_int;
537:
1.105 markus 538: case oRekeyLimit:
539: arg = strdelim(&s);
540: if (!arg || *arg == '\0')
541: fatal("%.200s line %d: Missing argument.", filename, linenum);
542: if (arg[0] < '0' || arg[0] > '9')
543: fatal("%.200s line %d: Bad number.", filename, linenum);
1.146 djm 544: orig = val64 = strtoll(arg, &endofnumber, 10);
1.105 markus 545: if (arg == endofnumber)
546: fatal("%.200s line %d: Bad number.", filename, linenum);
547: switch (toupper(*endofnumber)) {
1.146 djm 548: case '\0':
549: scale = 1;
550: break;
1.105 markus 551: case 'K':
1.146 djm 552: scale = 1<<10;
1.105 markus 553: break;
554: case 'M':
1.146 djm 555: scale = 1<<20;
1.105 markus 556: break;
557: case 'G':
1.146 djm 558: scale = 1<<30;
1.105 markus 559: break;
1.146 djm 560: default:
561: fatal("%.200s line %d: Invalid RekeyLimit suffix",
562: filename, linenum);
1.105 markus 563: }
1.146 djm 564: val64 *= scale;
565: /* detect integer wrap and too-large limits */
1.165 djm 566: if ((val64 / scale) != orig || val64 > UINT_MAX)
1.146 djm 567: fatal("%.200s line %d: RekeyLimit too large",
568: filename, linenum);
569: if (val64 < 16)
570: fatal("%.200s line %d: RekeyLimit too small",
571: filename, linenum);
1.165 djm 572: if (*activep && options->rekey_limit == -1)
573: options->rekey_limit = (u_int32_t)val64;
1.105 markus 574: break;
575:
1.17 markus 576: case oIdentityFile:
1.42 provos 577: arg = strdelim(&s);
1.40 ho 578: if (!arg || *arg == '\0')
1.17 markus 579: fatal("%.200s line %d: Missing argument.", filename, linenum);
580: if (*activep) {
1.50 markus 581: intptr = &options->num_identity_files;
1.27 markus 582: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 583: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 584: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.161 stevesk 585: charptr = &options->identity_files[*intptr];
1.38 provos 586: *charptr = xstrdup(arg);
1.27 markus 587: *intptr = *intptr + 1;
1.17 markus 588: }
589: break;
590:
1.34 markus 591: case oXAuthLocation:
592: charptr=&options->xauth_location;
593: goto parse_string;
594:
1.17 markus 595: case oUser:
596: charptr = &options->user;
597: parse_string:
1.42 provos 598: arg = strdelim(&s);
1.40 ho 599: if (!arg || *arg == '\0')
1.193 djm 600: fatal("%.200s line %d: Missing argument.",
601: filename, linenum);
1.17 markus 602: if (*activep && *charptr == NULL)
1.38 provos 603: *charptr = xstrdup(arg);
1.17 markus 604: break;
605:
606: case oGlobalKnownHostsFile:
1.193 djm 607: cpptr = (char **)&options->system_hostfiles;
608: uintptr = &options->num_system_hostfiles;
609: max_entries = SSH_MAX_HOSTS_FILES;
610: parse_char_array:
611: if (*activep && *uintptr == 0) {
612: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
613: if ((*uintptr) >= max_entries)
614: fatal("%s line %d: "
615: "too many authorized keys files.",
616: filename, linenum);
617: cpptr[(*uintptr)++] = xstrdup(arg);
618: }
619: }
620: return 0;
1.17 markus 621:
622: case oUserKnownHostsFile:
1.193 djm 623: cpptr = (char **)&options->user_hostfiles;
624: uintptr = &options->num_user_hostfiles;
625: max_entries = SSH_MAX_HOSTS_FILES;
626: goto parse_char_array;
1.27 markus 627:
1.17 markus 628: case oHostName:
629: charptr = &options->hostname;
630: goto parse_string;
631:
1.52 markus 632: case oHostKeyAlias:
633: charptr = &options->host_key_alias;
634: goto parse_string;
635:
1.67 markus 636: case oPreferredAuthentications:
637: charptr = &options->preferred_authentications;
638: goto parse_string;
639:
1.77 markus 640: case oBindAddress:
641: charptr = &options->bind_address;
642: goto parse_string;
643:
1.183 markus 644: case oPKCS11Provider:
645: charptr = &options->pkcs11_provider;
1.86 markus 646: goto parse_string;
1.85 jakob 647:
1.17 markus 648: case oProxyCommand:
1.144 reyk 649: charptr = &options->proxy_command;
650: parse_command:
1.113 markus 651: if (s == NULL)
652: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 653: len = strspn(s, WHITESPACE "=");
1.17 markus 654: if (*activep && *charptr == NULL)
1.102 markus 655: *charptr = xstrdup(s + len);
1.17 markus 656: return 0;
657:
658: case oPort:
659: intptr = &options->port;
660: parse_int:
1.42 provos 661: arg = strdelim(&s);
1.40 ho 662: if (!arg || *arg == '\0')
1.17 markus 663: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 664: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 665: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 666:
667: /* Octal, decimal, or hex format? */
1.38 provos 668: value = strtol(arg, &endofnumber, 0);
669: if (arg == endofnumber)
1.21 markus 670: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 671: if (*activep && *intptr == -1)
672: *intptr = value;
673: break;
674:
675: case oConnectionAttempts:
676: intptr = &options->connection_attempts;
677: goto parse_int;
678:
679: case oCipher:
680: intptr = &options->cipher;
1.42 provos 681: arg = strdelim(&s);
1.40 ho 682: if (!arg || *arg == '\0')
1.32 markus 683: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 684: value = cipher_number(arg);
1.17 markus 685: if (value == -1)
686: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 687: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 688: if (*activep && *intptr == -1)
689: *intptr = value;
690: break;
691:
1.25 markus 692: case oCiphers:
1.42 provos 693: arg = strdelim(&s);
1.40 ho 694: if (!arg || *arg == '\0')
1.32 markus 695: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 696: if (!ciphers_valid(arg))
1.31 markus 697: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 698: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 699: if (*activep && options->ciphers == NULL)
1.38 provos 700: options->ciphers = xstrdup(arg);
1.25 markus 701: break;
702:
1.62 markus 703: case oMacs:
704: arg = strdelim(&s);
705: if (!arg || *arg == '\0')
706: fatal("%.200s line %d: Missing argument.", filename, linenum);
707: if (!mac_valid(arg))
708: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 709: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 710: if (*activep && options->macs == NULL)
711: options->macs = xstrdup(arg);
712: break;
713:
1.189 djm 714: case oKexAlgorithms:
715: arg = strdelim(&s);
716: if (!arg || *arg == '\0')
717: fatal("%.200s line %d: Missing argument.",
718: filename, linenum);
719: if (!kex_names_valid(arg))
720: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
721: filename, linenum, arg ? arg : "<NONE>");
722: if (*activep && options->kex_algorithms == NULL)
723: options->kex_algorithms = xstrdup(arg);
724: break;
725:
1.76 markus 726: case oHostKeyAlgorithms:
727: arg = strdelim(&s);
728: if (!arg || *arg == '\0')
729: fatal("%.200s line %d: Missing argument.", filename, linenum);
730: if (!key_names_valid2(arg))
731: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 732: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 733: if (*activep && options->hostkeyalgorithms == NULL)
734: options->hostkeyalgorithms = xstrdup(arg);
735: break;
736:
1.25 markus 737: case oProtocol:
738: intptr = &options->protocol;
1.42 provos 739: arg = strdelim(&s);
1.40 ho 740: if (!arg || *arg == '\0')
1.32 markus 741: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 742: value = proto_spec(arg);
1.25 markus 743: if (value == SSH_PROTO_UNKNOWN)
744: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 745: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 746: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
747: *intptr = value;
748: break;
749:
1.17 markus 750: case oLogLevel:
1.164 dtucker 751: log_level_ptr = &options->log_level;
1.42 provos 752: arg = strdelim(&s);
1.38 provos 753: value = log_level_number(arg);
1.95 markus 754: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 755: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 756: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 757: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
758: *log_level_ptr = (LogLevel) value;
1.17 markus 759: break;
760:
1.88 stevesk 761: case oLocalForward:
1.17 markus 762: case oRemoteForward:
1.168 stevesk 763: case oDynamicForward:
1.42 provos 764: arg = strdelim(&s);
1.135 djm 765: if (arg == NULL || *arg == '\0')
1.88 stevesk 766: fatal("%.200s line %d: Missing port argument.",
767: filename, linenum);
1.135 djm 768:
1.168 stevesk 769: if (opcode == oLocalForward ||
770: opcode == oRemoteForward) {
771: arg2 = strdelim(&s);
772: if (arg2 == NULL || *arg2 == '\0')
773: fatal("%.200s line %d: Missing target argument.",
774: filename, linenum);
1.135 djm 775:
1.168 stevesk 776: /* construct a string for parse_forward */
777: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
778: } else if (opcode == oDynamicForward) {
779: strlcpy(fwdarg, arg, sizeof(fwdarg));
780: }
781:
782: if (parse_forward(&fwd, fwdarg,
1.176 djm 783: opcode == oDynamicForward ? 1 : 0,
784: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 785: fatal("%.200s line %d: Bad forwarding specification.",
786: filename, linenum);
1.135 djm 787:
1.88 stevesk 788: if (*activep) {
1.168 stevesk 789: if (opcode == oLocalForward ||
790: opcode == oDynamicForward)
1.135 djm 791: add_local_forward(options, &fwd);
1.88 stevesk 792: else if (opcode == oRemoteForward)
1.135 djm 793: add_remote_forward(options, &fwd);
1.88 stevesk 794: }
1.17 markus 795: break;
1.71 markus 796:
1.90 stevesk 797: case oClearAllForwardings:
798: intptr = &options->clear_forwardings;
799: goto parse_flag;
800:
1.17 markus 801: case oHost:
802: *activep = 0;
1.191 djm 803: arg2 = NULL;
804: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
805: negated = *arg == '!';
806: if (negated)
807: arg++;
1.38 provos 808: if (match_pattern(host, arg)) {
1.191 djm 809: if (negated) {
810: debug("%.200s line %d: Skipping Host "
811: "block because of negated match "
812: "for %.100s", filename, linenum,
813: arg);
814: *activep = 0;
815: break;
816: }
817: if (!*activep)
818: arg2 = arg; /* logged below */
1.17 markus 819: *activep = 1;
820: }
1.191 djm 821: }
822: if (*activep)
823: debug("%.200s line %d: Applying options for %.100s",
824: filename, linenum, arg2);
1.42 provos 825: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 826: return 0;
827:
828: case oEscapeChar:
829: intptr = &options->escape_char;
1.42 provos 830: arg = strdelim(&s);
1.40 ho 831: if (!arg || *arg == '\0')
1.17 markus 832: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 833: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 834: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
835: value = (u_char) arg[1] & 31;
1.38 provos 836: else if (strlen(arg) == 1)
1.51 markus 837: value = (u_char) arg[0];
1.38 provos 838: else if (strcmp(arg, "none") == 0)
1.79 stevesk 839: value = SSH_ESCAPECHAR_NONE;
1.17 markus 840: else {
841: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 842: filename, linenum);
1.17 markus 843: /* NOTREACHED */
844: value = 0; /* Avoid compiler warning. */
845: }
846: if (*activep && *intptr == -1)
847: *intptr = value;
1.112 djm 848: break;
849:
850: case oAddressFamily:
851: arg = strdelim(&s);
1.140 markus 852: if (!arg || *arg == '\0')
853: fatal("%s line %d: missing address family.",
854: filename, linenum);
1.114 djm 855: intptr = &options->address_family;
1.112 djm 856: if (strcasecmp(arg, "inet") == 0)
1.114 djm 857: value = AF_INET;
1.112 djm 858: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 859: value = AF_INET6;
1.112 djm 860: else if (strcasecmp(arg, "any") == 0)
1.114 djm 861: value = AF_UNSPEC;
1.112 djm 862: else
863: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 864: if (*activep && *intptr == -1)
865: *intptr = value;
1.17 markus 866: break;
867:
1.101 markus 868: case oEnableSSHKeysign:
869: intptr = &options->enable_ssh_keysign;
870: goto parse_flag;
871:
1.128 markus 872: case oIdentitiesOnly:
873: intptr = &options->identities_only;
874: goto parse_flag;
875:
1.127 markus 876: case oServerAliveInterval:
877: intptr = &options->server_alive_interval;
878: goto parse_time;
879:
880: case oServerAliveCountMax:
881: intptr = &options->server_alive_count_max;
882: goto parse_int;
883:
1.130 djm 884: case oSendEnv:
885: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
886: if (strchr(arg, '=') != NULL)
887: fatal("%s line %d: Invalid environment name.",
888: filename, linenum);
1.137 djm 889: if (!*activep)
890: continue;
1.130 djm 891: if (options->num_send_env >= MAX_SEND_ENV)
892: fatal("%s line %d: too many send env.",
893: filename, linenum);
894: options->send_env[options->num_send_env++] =
895: xstrdup(arg);
896: }
897: break;
898:
1.132 djm 899: case oControlPath:
900: charptr = &options->control_path;
901: goto parse_string;
902:
903: case oControlMaster:
904: intptr = &options->control_master;
1.141 djm 905: arg = strdelim(&s);
906: if (!arg || *arg == '\0')
907: fatal("%.200s line %d: Missing ControlMaster argument.",
908: filename, linenum);
909: value = 0; /* To avoid compiler warning... */
910: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
911: value = SSHCTL_MASTER_YES;
912: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
913: value = SSHCTL_MASTER_NO;
914: else if (strcmp(arg, "auto") == 0)
915: value = SSHCTL_MASTER_AUTO;
916: else if (strcmp(arg, "ask") == 0)
917: value = SSHCTL_MASTER_ASK;
918: else if (strcmp(arg, "autoask") == 0)
919: value = SSHCTL_MASTER_AUTO_ASK;
920: else
921: fatal("%.200s line %d: Bad ControlMaster argument.",
922: filename, linenum);
923: if (*activep && *intptr == -1)
924: *intptr = value;
925: break;
1.132 djm 926:
1.187 djm 927: case oControlPersist:
928: /* no/false/yes/true, or a time spec */
929: intptr = &options->control_persist;
930: arg = strdelim(&s);
931: if (!arg || *arg == '\0')
932: fatal("%.200s line %d: Missing ControlPersist"
933: " argument.", filename, linenum);
934: value = 0;
935: value2 = 0; /* timeout */
936: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
937: value = 0;
938: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
939: value = 1;
940: else if ((value2 = convtime(arg)) >= 0)
941: value = 1;
942: else
943: fatal("%.200s line %d: Bad ControlPersist argument.",
944: filename, linenum);
945: if (*activep && *intptr == -1) {
946: *intptr = value;
947: options->control_persist_timeout = value2;
948: }
949: break;
950:
1.136 djm 951: case oHashKnownHosts:
952: intptr = &options->hash_known_hosts;
953: goto parse_flag;
954:
1.144 reyk 955: case oTunnel:
956: intptr = &options->tun_open;
1.145 reyk 957: arg = strdelim(&s);
958: if (!arg || *arg == '\0')
959: fatal("%s line %d: Missing yes/point-to-point/"
960: "ethernet/no argument.", filename, linenum);
961: value = 0; /* silence compiler */
962: if (strcasecmp(arg, "ethernet") == 0)
963: value = SSH_TUNMODE_ETHERNET;
964: else if (strcasecmp(arg, "point-to-point") == 0)
965: value = SSH_TUNMODE_POINTOPOINT;
966: else if (strcasecmp(arg, "yes") == 0)
967: value = SSH_TUNMODE_DEFAULT;
968: else if (strcasecmp(arg, "no") == 0)
969: value = SSH_TUNMODE_NO;
970: else
971: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
972: "no argument: %s", filename, linenum, arg);
973: if (*activep)
974: *intptr = value;
975: break;
1.144 reyk 976:
977: case oTunnelDevice:
978: arg = strdelim(&s);
979: if (!arg || *arg == '\0')
980: fatal("%.200s line %d: Missing argument.", filename, linenum);
981: value = a2tun(arg, &value2);
1.145 reyk 982: if (value == SSH_TUNID_ERR)
1.144 reyk 983: fatal("%.200s line %d: Bad tun device.", filename, linenum);
984: if (*activep) {
985: options->tun_local = value;
986: options->tun_remote = value2;
987: }
988: break;
989:
990: case oLocalCommand:
991: charptr = &options->local_command;
992: goto parse_command;
993:
994: case oPermitLocalCommand:
995: intptr = &options->permit_local_command;
996: goto parse_flag;
997:
1.167 grunk 998: case oVisualHostKey:
999: intptr = &options->visual_host_key;
1000: goto parse_flag;
1001:
1.190 djm 1002: case oIPQoS:
1003: arg = strdelim(&s);
1004: if ((value = parse_ipqos(arg)) == -1)
1005: fatal("%s line %d: Bad IPQoS value: %s",
1006: filename, linenum, arg);
1007: arg = strdelim(&s);
1008: if (arg == NULL)
1009: value2 = value;
1010: else if ((value2 = parse_ipqos(arg)) == -1)
1011: fatal("%s line %d: Bad IPQoS value: %s",
1012: filename, linenum, arg);
1013: if (*activep) {
1014: options->ip_qos_interactive = value;
1015: options->ip_qos_bulk = value2;
1016: }
1017: break;
1018:
1.177 andreas 1019: case oUseRoaming:
1020: intptr = &options->use_roaming;
1021: goto parse_flag;
1022:
1.192 djm 1023: case oRequestTTY:
1024: arg = strdelim(&s);
1025: if (!arg || *arg == '\0')
1026: fatal("%s line %d: missing argument.",
1027: filename, linenum);
1028: intptr = &options->request_tty;
1029: if (strcasecmp(arg, "yes") == 0)
1030: value = REQUEST_TTY_YES;
1031: else if (strcasecmp(arg, "no") == 0)
1032: value = REQUEST_TTY_NO;
1033: else if (strcasecmp(arg, "force") == 0)
1034: value = REQUEST_TTY_FORCE;
1035: else if (strcasecmp(arg, "auto") == 0)
1036: value = REQUEST_TTY_AUTO;
1037: else
1038: fatal("Unsupported RequestTTY \"%s\"", arg);
1039: if (*activep && *intptr == -1)
1040: *intptr = value;
1041: break;
1042:
1.96 markus 1043: case oDeprecated:
1.98 markus 1044: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1045: filename, linenum, keyword);
1.98 markus 1046: return 0;
1.96 markus 1047:
1.110 jakob 1048: case oUnsupported:
1049: error("%s line %d: Unsupported option \"%s\"",
1050: filename, linenum, keyword);
1051: return 0;
1052:
1.17 markus 1053: default:
1054: fatal("process_config_line: Unimplemented opcode %d", opcode);
1055: }
1056:
1057: /* Check that there is no garbage at end of line. */
1.57 djm 1058: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1059: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1060: filename, linenum, arg);
1.39 ho 1061: }
1.17 markus 1062: return 0;
1.1 deraadt 1063: }
1064:
1065:
1.19 markus 1066: /*
1067: * Reads the config file and modifies the options accordingly. Options
1068: * should already be initialized before this call. This never returns if
1.89 stevesk 1069: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1070: */
1.1 deraadt 1071:
1.89 stevesk 1072: int
1.134 deraadt 1073: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 1074: int checkperm)
1.1 deraadt 1075: {
1.17 markus 1076: FILE *f;
1077: char line[1024];
1078: int active, linenum;
1079: int bad_options = 0;
1080:
1.129 djm 1081: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1082: return 0;
1.129 djm 1083:
1084: if (checkperm) {
1085: struct stat sb;
1.134 deraadt 1086:
1.131 dtucker 1087: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1088: fatal("fstat %s: %s", filename, strerror(errno));
1089: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1090: (sb.st_mode & 022) != 0))
1.129 djm 1091: fatal("Bad owner or permissions on %s", filename);
1092: }
1.17 markus 1093:
1094: debug("Reading configuration data %.200s", filename);
1095:
1.19 markus 1096: /*
1097: * Mark that we are now processing the options. This flag is turned
1098: * on/off by Host specifications.
1099: */
1.17 markus 1100: active = 1;
1101: linenum = 0;
1102: while (fgets(line, sizeof(line), f)) {
1103: /* Update line number counter. */
1104: linenum++;
1105: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
1106: bad_options++;
1107: }
1108: fclose(f);
1109: if (bad_options > 0)
1.64 millert 1110: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1111: filename, bad_options);
1.89 stevesk 1112: return 1;
1.1 deraadt 1113: }
1114:
1.19 markus 1115: /*
1116: * Initializes options to special values that indicate that they have not yet
1117: * been set. Read_config_file will only set options with this value. Options
1118: * are processed in the following order: command line, user config file,
1119: * system config file. Last, fill_default_options is called.
1120: */
1.1 deraadt 1121:
1.26 markus 1122: void
1.17 markus 1123: initialize_options(Options * options)
1.1 deraadt 1124: {
1.17 markus 1125: memset(options, 'X', sizeof(*options));
1126: options->forward_agent = -1;
1127: options->forward_x11 = -1;
1.123 markus 1128: options->forward_x11_trusted = -1;
1.186 djm 1129: options->forward_x11_timeout = -1;
1.153 markus 1130: options->exit_on_forward_failure = -1;
1.34 markus 1131: options->xauth_location = NULL;
1.17 markus 1132: options->gateway_ports = -1;
1133: options->use_privileged_port = -1;
1134: options->rsa_authentication = -1;
1.50 markus 1135: options->pubkey_authentication = -1;
1.78 markus 1136: options->challenge_response_authentication = -1;
1.118 markus 1137: options->gss_authentication = -1;
1138: options->gss_deleg_creds = -1;
1.17 markus 1139: options->password_authentication = -1;
1.48 markus 1140: options->kbd_interactive_authentication = -1;
1141: options->kbd_interactive_devices = NULL;
1.17 markus 1142: options->rhosts_rsa_authentication = -1;
1.72 markus 1143: options->hostbased_authentication = -1;
1.17 markus 1144: options->batch_mode = -1;
1145: options->check_host_ip = -1;
1146: options->strict_host_key_checking = -1;
1147: options->compression = -1;
1.126 markus 1148: options->tcp_keep_alive = -1;
1.17 markus 1149: options->compression_level = -1;
1150: options->port = -1;
1.114 djm 1151: options->address_family = -1;
1.17 markus 1152: options->connection_attempts = -1;
1.111 djm 1153: options->connection_timeout = -1;
1.17 markus 1154: options->number_of_password_prompts = -1;
1155: options->cipher = -1;
1.25 markus 1156: options->ciphers = NULL;
1.62 markus 1157: options->macs = NULL;
1.189 djm 1158: options->kex_algorithms = NULL;
1.76 markus 1159: options->hostkeyalgorithms = NULL;
1.25 markus 1160: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1161: options->num_identity_files = 0;
1162: options->hostname = NULL;
1.52 markus 1163: options->host_key_alias = NULL;
1.17 markus 1164: options->proxy_command = NULL;
1165: options->user = NULL;
1166: options->escape_char = -1;
1.193 djm 1167: options->num_system_hostfiles = 0;
1168: options->num_user_hostfiles = 0;
1.185 djm 1169: options->local_forwards = NULL;
1.17 markus 1170: options->num_local_forwards = 0;
1.185 djm 1171: options->remote_forwards = NULL;
1.17 markus 1172: options->num_remote_forwards = 0;
1.90 stevesk 1173: options->clear_forwardings = -1;
1.95 markus 1174: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1175: options->preferred_authentications = NULL;
1.77 markus 1176: options->bind_address = NULL;
1.183 markus 1177: options->pkcs11_provider = NULL;
1.101 markus 1178: options->enable_ssh_keysign = - 1;
1.91 markus 1179: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1180: options->identities_only = - 1;
1.105 markus 1181: options->rekey_limit = - 1;
1.107 jakob 1182: options->verify_host_key_dns = -1;
1.127 markus 1183: options->server_alive_interval = -1;
1184: options->server_alive_count_max = -1;
1.130 djm 1185: options->num_send_env = 0;
1.132 djm 1186: options->control_path = NULL;
1187: options->control_master = -1;
1.187 djm 1188: options->control_persist = -1;
1189: options->control_persist_timeout = 0;
1.136 djm 1190: options->hash_known_hosts = -1;
1.144 reyk 1191: options->tun_open = -1;
1192: options->tun_local = -1;
1193: options->tun_remote = -1;
1194: options->local_command = NULL;
1195: options->permit_local_command = -1;
1.177 andreas 1196: options->use_roaming = -1;
1.167 grunk 1197: options->visual_host_key = -1;
1.171 djm 1198: options->zero_knowledge_password_authentication = -1;
1.190 djm 1199: options->ip_qos_interactive = -1;
1200: options->ip_qos_bulk = -1;
1.192 djm 1201: options->request_tty = -1;
1.1 deraadt 1202: }
1203:
1.19 markus 1204: /*
1205: * Called after processing other sources of option data, this fills those
1206: * options for which no value has been specified with their default values.
1207: */
1.1 deraadt 1208:
1.26 markus 1209: void
1.17 markus 1210: fill_default_options(Options * options)
1.1 deraadt 1211: {
1.61 deraadt 1212: int len;
1213:
1.17 markus 1214: if (options->forward_agent == -1)
1.33 markus 1215: options->forward_agent = 0;
1.17 markus 1216: if (options->forward_x11 == -1)
1.23 markus 1217: options->forward_x11 = 0;
1.123 markus 1218: if (options->forward_x11_trusted == -1)
1219: options->forward_x11_trusted = 0;
1.186 djm 1220: if (options->forward_x11_timeout == -1)
1221: options->forward_x11_timeout = 1200;
1.153 markus 1222: if (options->exit_on_forward_failure == -1)
1223: options->exit_on_forward_failure = 0;
1.34 markus 1224: if (options->xauth_location == NULL)
1.80 markus 1225: options->xauth_location = _PATH_XAUTH;
1.17 markus 1226: if (options->gateway_ports == -1)
1227: options->gateway_ports = 0;
1228: if (options->use_privileged_port == -1)
1.65 markus 1229: options->use_privileged_port = 0;
1.17 markus 1230: if (options->rsa_authentication == -1)
1231: options->rsa_authentication = 1;
1.50 markus 1232: if (options->pubkey_authentication == -1)
1233: options->pubkey_authentication = 1;
1.78 markus 1234: if (options->challenge_response_authentication == -1)
1.83 markus 1235: options->challenge_response_authentication = 1;
1.118 markus 1236: if (options->gss_authentication == -1)
1.122 markus 1237: options->gss_authentication = 0;
1.118 markus 1238: if (options->gss_deleg_creds == -1)
1239: options->gss_deleg_creds = 0;
1.17 markus 1240: if (options->password_authentication == -1)
1241: options->password_authentication = 1;
1.48 markus 1242: if (options->kbd_interactive_authentication == -1)
1.59 markus 1243: options->kbd_interactive_authentication = 1;
1.17 markus 1244: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1245: options->rhosts_rsa_authentication = 0;
1.72 markus 1246: if (options->hostbased_authentication == -1)
1247: options->hostbased_authentication = 0;
1.17 markus 1248: if (options->batch_mode == -1)
1249: options->batch_mode = 0;
1250: if (options->check_host_ip == -1)
1251: options->check_host_ip = 1;
1252: if (options->strict_host_key_checking == -1)
1253: options->strict_host_key_checking = 2; /* 2 is default */
1254: if (options->compression == -1)
1255: options->compression = 0;
1.126 markus 1256: if (options->tcp_keep_alive == -1)
1257: options->tcp_keep_alive = 1;
1.17 markus 1258: if (options->compression_level == -1)
1259: options->compression_level = 6;
1260: if (options->port == -1)
1261: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1262: if (options->address_family == -1)
1263: options->address_family = AF_UNSPEC;
1.17 markus 1264: if (options->connection_attempts == -1)
1.84 markus 1265: options->connection_attempts = 1;
1.17 markus 1266: if (options->number_of_password_prompts == -1)
1267: options->number_of_password_prompts = 3;
1268: /* Selected in ssh_login(). */
1269: if (options->cipher == -1)
1270: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1271: /* options->ciphers, default set in myproposals.h */
1.62 markus 1272: /* options->macs, default set in myproposals.h */
1.189 djm 1273: /* options->kex_algorithms, default set in myproposals.h */
1.76 markus 1274: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1275: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1276: options->protocol = SSH_PROTO_2;
1.17 markus 1277: if (options->num_identity_files == 0) {
1.50 markus 1278: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1279: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1280: options->identity_files[options->num_identity_files] =
1.61 deraadt 1281: xmalloc(len);
1282: snprintf(options->identity_files[options->num_identity_files++],
1283: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1284: }
1285: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1286: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1287: options->identity_files[options->num_identity_files] =
1288: xmalloc(len);
1289: snprintf(options->identity_files[options->num_identity_files++],
1290: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1291:
1.61 deraadt 1292: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1293: options->identity_files[options->num_identity_files] =
1.61 deraadt 1294: xmalloc(len);
1295: snprintf(options->identity_files[options->num_identity_files++],
1296: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.188 djm 1297:
1298: len = 2 + strlen(_PATH_SSH_CLIENT_ID_ECDSA) + 1;
1299: options->identity_files[options->num_identity_files] =
1300: xmalloc(len);
1301: snprintf(options->identity_files[options->num_identity_files++],
1302: len, "~/%.100s", _PATH_SSH_CLIENT_ID_ECDSA);
1.50 markus 1303: }
1.27 markus 1304: }
1.17 markus 1305: if (options->escape_char == -1)
1306: options->escape_char = '~';
1.193 djm 1307: if (options->num_system_hostfiles == 0) {
1308: options->system_hostfiles[options->num_system_hostfiles++] =
1309: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1310: options->system_hostfiles[options->num_system_hostfiles++] =
1311: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1312: }
1313: if (options->num_user_hostfiles == 0) {
1314: options->user_hostfiles[options->num_user_hostfiles++] =
1315: xstrdup(_PATH_SSH_USER_HOSTFILE);
1316: options->user_hostfiles[options->num_user_hostfiles++] =
1317: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1318: }
1.95 markus 1319: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1320: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1321: if (options->clear_forwardings == 1)
1322: clear_forwardings(options);
1.91 markus 1323: if (options->no_host_authentication_for_localhost == - 1)
1324: options->no_host_authentication_for_localhost = 0;
1.128 markus 1325: if (options->identities_only == -1)
1326: options->identities_only = 0;
1.101 markus 1327: if (options->enable_ssh_keysign == -1)
1328: options->enable_ssh_keysign = 0;
1.105 markus 1329: if (options->rekey_limit == -1)
1330: options->rekey_limit = 0;
1.107 jakob 1331: if (options->verify_host_key_dns == -1)
1332: options->verify_host_key_dns = 0;
1.127 markus 1333: if (options->server_alive_interval == -1)
1334: options->server_alive_interval = 0;
1335: if (options->server_alive_count_max == -1)
1336: options->server_alive_count_max = 3;
1.132 djm 1337: if (options->control_master == -1)
1338: options->control_master = 0;
1.187 djm 1339: if (options->control_persist == -1) {
1340: options->control_persist = 0;
1341: options->control_persist_timeout = 0;
1342: }
1.136 djm 1343: if (options->hash_known_hosts == -1)
1344: options->hash_known_hosts = 0;
1.144 reyk 1345: if (options->tun_open == -1)
1.145 reyk 1346: options->tun_open = SSH_TUNMODE_NO;
1347: if (options->tun_local == -1)
1348: options->tun_local = SSH_TUNID_ANY;
1349: if (options->tun_remote == -1)
1350: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1351: if (options->permit_local_command == -1)
1352: options->permit_local_command = 0;
1.177 andreas 1353: if (options->use_roaming == -1)
1354: options->use_roaming = 1;
1.167 grunk 1355: if (options->visual_host_key == -1)
1356: options->visual_host_key = 0;
1.171 djm 1357: if (options->zero_knowledge_password_authentication == -1)
1358: options->zero_knowledge_password_authentication = 0;
1.190 djm 1359: if (options->ip_qos_interactive == -1)
1360: options->ip_qos_interactive = IPTOS_LOWDELAY;
1361: if (options->ip_qos_bulk == -1)
1362: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1363: if (options->request_tty == -1)
1364: options->request_tty = REQUEST_TTY_AUTO;
1.144 reyk 1365: /* options->local_command should not be set by default */
1.17 markus 1366: /* options->proxy_command should not be set by default */
1367: /* options->user will be set in the main program if appropriate */
1368: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1369: /* options->host_key_alias should not be set by default */
1.67 markus 1370: /* options->preferred_authentications will be set in ssh */
1.135 djm 1371: }
1372:
1373: /*
1374: * parse_forward
1375: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 1376: * dynamicfwd == 0
1.135 djm 1377: * [listenhost:]listenport:connecthost:connectport
1.168 stevesk 1378: * dynamicfwd == 1
1379: * [listenhost:]listenport
1.135 djm 1380: * returns number of arguments parsed or zero on error
1381: */
1382: int
1.176 djm 1383: parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 1384: {
1385: int i;
1386: char *p, *cp, *fwdarg[4];
1387:
1388: memset(fwd, '\0', sizeof(*fwd));
1389:
1390: cp = p = xstrdup(fwdspec);
1391:
1392: /* skip leading spaces */
1.162 tedu 1393: while (isspace(*cp))
1.135 djm 1394: cp++;
1395:
1396: for (i = 0; i < 4; ++i)
1397: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1398: break;
1399:
1.170 stevesk 1400: /* Check for trailing garbage */
1.135 djm 1401: if (cp != NULL)
1402: i = 0; /* failure */
1403:
1404: switch (i) {
1.168 stevesk 1405: case 1:
1406: fwd->listen_host = NULL;
1407: fwd->listen_port = a2port(fwdarg[0]);
1408: fwd->connect_host = xstrdup("socks");
1409: break;
1410:
1411: case 2:
1412: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1413: fwd->listen_port = a2port(fwdarg[1]);
1414: fwd->connect_host = xstrdup("socks");
1415: break;
1416:
1.135 djm 1417: case 3:
1418: fwd->listen_host = NULL;
1419: fwd->listen_port = a2port(fwdarg[0]);
1420: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1421: fwd->connect_port = a2port(fwdarg[2]);
1422: break;
1423:
1424: case 4:
1425: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1426: fwd->listen_port = a2port(fwdarg[1]);
1427: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1428: fwd->connect_port = a2port(fwdarg[3]);
1429: break;
1430: default:
1431: i = 0; /* failure */
1432: }
1433:
1434: xfree(p);
1435:
1.168 stevesk 1436: if (dynamicfwd) {
1437: if (!(i == 1 || i == 2))
1438: goto fail_free;
1439: } else {
1440: if (!(i == 3 || i == 4))
1441: goto fail_free;
1.175 djm 1442: if (fwd->connect_port <= 0)
1.168 stevesk 1443: goto fail_free;
1444: }
1445:
1.176 djm 1446: if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0))
1.135 djm 1447: goto fail_free;
1448:
1449: if (fwd->connect_host != NULL &&
1450: strlen(fwd->connect_host) >= NI_MAXHOST)
1451: goto fail_free;
1.176 djm 1452: if (fwd->listen_host != NULL &&
1453: strlen(fwd->listen_host) >= NI_MAXHOST)
1454: goto fail_free;
1455:
1.135 djm 1456:
1457: return (i);
1458:
1459: fail_free:
1.173 djm 1460: if (fwd->connect_host != NULL) {
1.135 djm 1461: xfree(fwd->connect_host);
1.173 djm 1462: fwd->connect_host = NULL;
1463: }
1464: if (fwd->listen_host != NULL) {
1.135 djm 1465: xfree(fwd->listen_host);
1.173 djm 1466: fwd->listen_host = NULL;
1467: }
1.135 djm 1468: return (0);
1.1 deraadt 1469: }
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