Annotation of src/usr.bin/ssh/readconf.c, Revision 1.219
1.219 ! djm 1: /* $OpenBSD: readconf.c,v 1.218 2014/02/23 20:11:36 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>
1.206 djm 18: #include <sys/wait.h>
1.152 stevesk 19:
20: #include <netinet/in.h>
1.190 djm 21: #include <netinet/in_systm.h>
22: #include <netinet/ip.h>
1.148 stevesk 23:
24: #include <ctype.h>
1.154 stevesk 25: #include <errno.h>
1.206 djm 26: #include <fcntl.h>
1.155 stevesk 27: #include <netdb.h>
1.206 djm 28: #include <paths.h>
29: #include <pwd.h>
1.159 deraadt 30: #include <signal.h>
1.158 stevesk 31: #include <stdio.h>
1.157 stevesk 32: #include <string.h>
1.156 stevesk 33: #include <unistd.h>
1.200 dtucker 34: #include <util.h>
1.1 deraadt 35:
1.159 deraadt 36: #include "xmalloc.h"
1.1 deraadt 37: #include "ssh.h"
1.25 markus 38: #include "compat.h"
1.58 markus 39: #include "cipher.h"
1.55 markus 40: #include "pathnames.h"
1.58 markus 41: #include "log.h"
1.159 deraadt 42: #include "key.h"
1.58 markus 43: #include "readconf.h"
44: #include "match.h"
45: #include "misc.h"
1.159 deraadt 46: #include "buffer.h"
1.62 markus 47: #include "kex.h"
48: #include "mac.h"
1.206 djm 49: #include "uidswap.h"
1.1 deraadt 50:
51: /* Format of the configuration file:
52:
53: # Configuration data is parsed as follows:
54: # 1. command line options
55: # 2. user-specific file
56: # 3. system-wide file
57: # Any configuration value is only changed the first time it is set.
58: # Thus, host-specific definitions should be at the beginning of the
59: # configuration file, and defaults at the end.
60:
61: # Host-specific declarations. These may override anything above. A single
62: # host may match multiple declarations; these are processed in the order
63: # that they are given in.
64:
65: Host *.ngs.fi ngs.fi
1.96 markus 66: User foo
1.1 deraadt 67:
68: Host fake.com
69: HostName another.host.name.real.org
70: User blaah
71: Port 34289
72: ForwardX11 no
73: ForwardAgent no
74:
75: Host books.com
76: RemoteForward 9999 shadows.cs.hut.fi:9999
77: Cipher 3des
78:
79: Host fascist.blob.com
80: Port 23123
81: User tylonen
82: PasswordAuthentication no
83:
84: Host puukko.hut.fi
85: User t35124p
86: ProxyCommand ssh-proxy %h %p
87:
88: Host *.fr
1.96 markus 89: PublicKeyAuthentication no
1.1 deraadt 90:
91: Host *.su
92: Cipher none
93: PasswordAuthentication no
94:
1.144 reyk 95: Host vpn.fake.com
96: Tunnel yes
97: TunnelDevice 3
98:
1.1 deraadt 99: # Defaults for various options
100: Host *
101: ForwardAgent no
1.50 markus 102: ForwardX11 no
1.1 deraadt 103: PasswordAuthentication yes
104: RSAAuthentication yes
105: RhostsRSAAuthentication yes
106: StrictHostKeyChecking yes
1.126 markus 107: TcpKeepAlive no
1.1 deraadt 108: IdentityFile ~/.ssh/identity
109: Port 22
110: EscapeChar ~
111:
112: */
113:
114: /* Keyword tokens. */
115:
1.17 markus 116: typedef enum {
117: oBadOption,
1.206 djm 118: oHost, oMatch,
1.186 djm 119: oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
120: oGatewayPorts, oExitOnForwardFailure,
1.100 deraadt 121: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 122: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 123: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
1.206 djm 124: oUser, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
1.17 markus 125: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
126: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 127: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 128: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 129: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 130: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 131: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.183 markus 132: oHostKeyAlgorithms, oBindAddress, oPKCS11Provider,
1.96 markus 133: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 134: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 135: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 136: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.187 djm 137: oSendEnv, oControlPath, oControlMaster, oControlPersist,
138: oHashKnownHosts,
1.144 reyk 139: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.216 djm 140: oVisualHostKey, oUseRoaming,
1.205 djm 141: oKexAlgorithms, oIPQoS, oRequestTTY, oIgnoreUnknown, oProxyUseFdpass,
1.209 djm 142: oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
143: oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
1.199 djm 144: oIgnoredUnknownOption, oDeprecated, oUnsupported
1.1 deraadt 145: } OpCodes;
146:
147: /* Textual representations of the tokens. */
148:
1.17 markus 149: static struct {
150: const char *name;
151: OpCodes opcode;
152: } keywords[] = {
153: { "forwardagent", oForwardAgent },
154: { "forwardx11", oForwardX11 },
1.123 markus 155: { "forwardx11trusted", oForwardX11Trusted },
1.186 djm 156: { "forwardx11timeout", oForwardX11Timeout },
1.153 markus 157: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 158: { "xauthlocation", oXAuthLocation },
1.17 markus 159: { "gatewayports", oGatewayPorts },
160: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 161: { "rhostsauthentication", oDeprecated },
1.17 markus 162: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 163: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
164: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 165: { "rsaauthentication", oRSAAuthentication },
1.50 markus 166: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 167: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 168: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 169: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 170: { "challengeresponseauthentication", oChallengeResponseAuthentication },
171: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
172: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 173: { "kerberosauthentication", oUnsupported },
174: { "kerberostgtpassing", oUnsupported },
175: { "afstokenpassing", oUnsupported },
1.118 markus 176: #if defined(GSSAPI)
177: { "gssapiauthentication", oGssAuthentication },
178: { "gssapidelegatecredentials", oGssDelegateCreds },
179: #else
180: { "gssapiauthentication", oUnsupported },
181: { "gssapidelegatecredentials", oUnsupported },
182: #endif
1.96 markus 183: { "fallbacktorsh", oDeprecated },
184: { "usersh", oDeprecated },
1.17 markus 185: { "identityfile", oIdentityFile },
1.174 stevesk 186: { "identityfile2", oIdentityFile }, /* obsolete */
1.128 markus 187: { "identitiesonly", oIdentitiesOnly },
1.17 markus 188: { "hostname", oHostName },
1.52 markus 189: { "hostkeyalias", oHostKeyAlias },
1.17 markus 190: { "proxycommand", oProxyCommand },
191: { "port", oPort },
192: { "cipher", oCipher },
1.25 markus 193: { "ciphers", oCiphers },
1.62 markus 194: { "macs", oMacs },
1.25 markus 195: { "protocol", oProtocol },
1.17 markus 196: { "remoteforward", oRemoteForward },
197: { "localforward", oLocalForward },
198: { "user", oUser },
199: { "host", oHost },
1.206 djm 200: { "match", oMatch },
1.17 markus 201: { "escapechar", oEscapeChar },
202: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.193 djm 203: { "globalknownhostsfile2", oDeprecated },
1.174 stevesk 204: { "userknownhostsfile", oUserKnownHostsFile },
1.193 djm 205: { "userknownhostsfile2", oDeprecated },
1.17 markus 206: { "connectionattempts", oConnectionAttempts },
207: { "batchmode", oBatchMode },
208: { "checkhostip", oCheckHostIP },
209: { "stricthostkeychecking", oStrictHostKeyChecking },
210: { "compression", oCompression },
211: { "compressionlevel", oCompressionLevel },
1.126 markus 212: { "tcpkeepalive", oTCPKeepAlive },
213: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 214: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
215: { "loglevel", oLogLevel },
1.71 markus 216: { "dynamicforward", oDynamicForward },
1.67 markus 217: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 218: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 219: { "bindaddress", oBindAddress },
1.183 markus 220: #ifdef ENABLE_PKCS11
221: { "smartcarddevice", oPKCS11Provider },
222: { "pkcs11provider", oPKCS11Provider },
1.110 jakob 223: #else
224: { "smartcarddevice", oUnsupported },
1.183 markus 225: { "pkcs11provider", oUnsupported },
1.110 jakob 226: #endif
1.93 deraadt 227: { "clearallforwardings", oClearAllForwardings },
1.101 markus 228: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 229: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 230: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 231: { "rekeylimit", oRekeyLimit },
1.111 djm 232: { "connecttimeout", oConnectTimeout },
1.112 djm 233: { "addressfamily", oAddressFamily },
1.127 markus 234: { "serveraliveinterval", oServerAliveInterval },
235: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 236: { "sendenv", oSendEnv },
1.132 djm 237: { "controlpath", oControlPath },
238: { "controlmaster", oControlMaster },
1.187 djm 239: { "controlpersist", oControlPersist },
1.136 djm 240: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 241: { "tunnel", oTunnel },
242: { "tunneldevice", oTunnelDevice },
243: { "localcommand", oLocalCommand },
244: { "permitlocalcommand", oPermitLocalCommand },
1.167 grunk 245: { "visualhostkey", oVisualHostKey },
1.177 andreas 246: { "useroaming", oUseRoaming },
1.189 djm 247: { "kexalgorithms", oKexAlgorithms },
1.190 djm 248: { "ipqos", oIPQoS },
1.192 djm 249: { "requesttty", oRequestTTY },
1.205 djm 250: { "proxyusefdpass", oProxyUseFdpass },
1.208 djm 251: { "canonicaldomains", oCanonicalDomains },
1.209 djm 252: { "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
253: { "canonicalizehostname", oCanonicalizeHostname },
254: { "canonicalizemaxdots", oCanonicalizeMaxDots },
255: { "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
1.199 djm 256: { "ignoreunknown", oIgnoreUnknown },
1.171 djm 257:
1.92 stevesk 258: { NULL, oBadOption }
1.13 markus 259: };
260:
1.19 markus 261: /*
262: * Adds a local TCP/IP port forward to options. Never returns if there is an
263: * error.
264: */
1.1 deraadt 265:
1.26 markus 266: void
1.135 djm 267: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 268: {
1.17 markus 269: Forward *fwd;
270: extern uid_t original_real_uid;
1.185 djm 271:
1.135 djm 272: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 273: fatal("Privileged ports can only be forwarded by root.");
1.185 djm 274: options->local_forwards = xrealloc(options->local_forwards,
275: options->num_local_forwards + 1,
276: sizeof(*options->local_forwards));
1.17 markus 277: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 278:
1.172 stevesk 279: fwd->listen_host = newfwd->listen_host;
1.135 djm 280: fwd->listen_port = newfwd->listen_port;
1.172 stevesk 281: fwd->connect_host = newfwd->connect_host;
1.135 djm 282: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 283: }
284:
1.19 markus 285: /*
286: * Adds a remote TCP/IP port forward to options. Never returns if there is
287: * an error.
288: */
1.1 deraadt 289:
1.26 markus 290: void
1.135 djm 291: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 292: {
1.17 markus 293: Forward *fwd;
1.185 djm 294:
295: options->remote_forwards = xrealloc(options->remote_forwards,
296: options->num_remote_forwards + 1,
297: sizeof(*options->remote_forwards));
1.17 markus 298: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 299:
1.172 stevesk 300: fwd->listen_host = newfwd->listen_host;
1.135 djm 301: fwd->listen_port = newfwd->listen_port;
1.172 stevesk 302: fwd->connect_host = newfwd->connect_host;
1.135 djm 303: fwd->connect_port = newfwd->connect_port;
1.194 markus 304: fwd->handle = newfwd->handle;
1.184 markus 305: fwd->allocated_port = 0;
1.1 deraadt 306: }
307:
1.90 stevesk 308: static void
309: clear_forwardings(Options *options)
310: {
311: int i;
312:
1.135 djm 313: for (i = 0; i < options->num_local_forwards; i++) {
1.202 djm 314: free(options->local_forwards[i].listen_host);
315: free(options->local_forwards[i].connect_host);
1.135 djm 316: }
1.185 djm 317: if (options->num_local_forwards > 0) {
1.202 djm 318: free(options->local_forwards);
1.185 djm 319: options->local_forwards = NULL;
320: }
1.90 stevesk 321: options->num_local_forwards = 0;
1.135 djm 322: for (i = 0; i < options->num_remote_forwards; i++) {
1.202 djm 323: free(options->remote_forwards[i].listen_host);
324: free(options->remote_forwards[i].connect_host);
1.135 djm 325: }
1.185 djm 326: if (options->num_remote_forwards > 0) {
1.202 djm 327: free(options->remote_forwards);
1.185 djm 328: options->remote_forwards = NULL;
329: }
1.90 stevesk 330: options->num_remote_forwards = 0;
1.145 reyk 331: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 332: }
333:
1.195 dtucker 334: void
335: add_identity_file(Options *options, const char *dir, const char *filename,
336: int userprovided)
337: {
338: char *path;
1.219 ! djm 339: int i;
1.195 dtucker 340:
341: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
342: fatal("Too many identity files specified (max %d)",
343: SSH_MAX_IDENTITY_FILES);
344:
345: if (dir == NULL) /* no dir, filename is absolute */
346: path = xstrdup(filename);
347: else
348: (void)xasprintf(&path, "%.100s%.100s", dir, filename);
1.219 ! djm 349:
! 350: /* Avoid registering duplicates */
! 351: for (i = 0; i < options->num_identity_files; i++) {
! 352: if (options->identity_file_userprovided[i] == userprovided &&
! 353: strcmp(options->identity_files[i], path) == 0) {
! 354: debug2("%s: ignoring duplicate key %s", __func__, path);
! 355: free(path);
! 356: return;
! 357: }
! 358: }
1.195 dtucker 359:
360: options->identity_file_userprovided[options->num_identity_files] =
361: userprovided;
362: options->identity_files[options->num_identity_files++] = path;
363: }
364:
1.206 djm 365: int
366: default_ssh_port(void)
367: {
368: static int port;
369: struct servent *sp;
370:
371: if (port == 0) {
372: sp = getservbyname(SSH_SERVICE_NAME, "tcp");
373: port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
374: }
375: return port;
376: }
377:
378: /*
379: * Execute a command in a shell.
380: * Return its exit status or -1 on abnormal exit.
381: */
382: static int
383: execute_in_shell(const char *cmd)
384: {
385: char *shell, *command_string;
386: pid_t pid;
387: int devnull, status;
388: extern uid_t original_real_uid;
389:
390: if ((shell = getenv("SHELL")) == NULL)
391: shell = _PATH_BSHELL;
392:
393: /*
394: * Use "exec" to avoid "sh -c" processes on some platforms
395: * (e.g. Solaris)
396: */
397: xasprintf(&command_string, "exec %s", cmd);
398:
399: /* Need this to redirect subprocess stdin/out */
400: if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
401: fatal("open(/dev/null): %s", strerror(errno));
402:
403: debug("Executing command: '%.500s'", cmd);
404:
405: /* Fork and execute the command. */
406: if ((pid = fork()) == 0) {
407: char *argv[4];
408:
409: /* Child. Permanently give up superuser privileges. */
410: permanently_drop_suid(original_real_uid);
411:
412: /* Redirect child stdin and stdout. Leave stderr */
413: if (dup2(devnull, STDIN_FILENO) == -1)
414: fatal("dup2: %s", strerror(errno));
415: if (dup2(devnull, STDOUT_FILENO) == -1)
416: fatal("dup2: %s", strerror(errno));
417: if (devnull > STDERR_FILENO)
418: close(devnull);
419: closefrom(STDERR_FILENO + 1);
420:
421: argv[0] = shell;
422: argv[1] = "-c";
423: argv[2] = command_string;
424: argv[3] = NULL;
425:
426: execv(argv[0], argv);
427: error("Unable to execute '%.100s': %s", cmd, strerror(errno));
428: /* Die with signal to make this error apparent to parent. */
429: signal(SIGTERM, SIG_DFL);
430: kill(getpid(), SIGTERM);
431: _exit(1);
432: }
433: /* Parent. */
434: if (pid < 0)
435: fatal("%s: fork: %.100s", __func__, strerror(errno));
436:
437: close(devnull);
438: free(command_string);
439:
440: while (waitpid(pid, &status, 0) == -1) {
441: if (errno != EINTR && errno != EAGAIN)
442: fatal("%s: waitpid: %s", __func__, strerror(errno));
443: }
444: if (!WIFEXITED(status)) {
445: error("command '%.100s' exited abnormally", cmd);
446: return -1;
447: }
448: debug3("command returned status %d", WEXITSTATUS(status));
449: return WEXITSTATUS(status);
450: }
451:
452: /*
453: * Parse and execute a Match directive.
454: */
455: static int
456: match_cfg_line(Options *options, char **condition, struct passwd *pw,
457: const char *host_arg, const char *filename, int linenum)
458: {
1.211 djm 459: char *arg, *attrib, *cmd, *cp = *condition, *host;
460: const char *ruser;
1.213 dtucker 461: int r, port, result = 1, attributes = 0;
1.206 djm 462: size_t len;
463: char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
464:
465: /*
466: * Configuration is likely to be incomplete at this point so we
467: * must be prepared to use default values.
468: */
469: port = options->port <= 0 ? default_ssh_port() : options->port;
470: ruser = options->user == NULL ? pw->pw_name : options->user;
1.211 djm 471: if (options->hostname != NULL) {
1.212 djm 472: /* NB. Please keep in sync with ssh.c:main() */
1.211 djm 473: host = percent_expand(options->hostname,
474: "h", host_arg, (char *)NULL);
475: } else
476: host = xstrdup(host_arg);
1.206 djm 477:
478: debug3("checking match for '%s' host %s", cp, host);
479: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.213 dtucker 480: attributes++;
481: if (strcasecmp(attrib, "all") == 0) {
482: if (attributes != 1 ||
483: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
484: error("'all' cannot be combined with other "
485: "Match attributes");
486: result = -1;
487: goto out;
488: }
489: *condition = cp;
490: result = 1;
491: goto out;
492: }
1.206 djm 493: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
494: error("Missing Match criteria for %s", attrib);
1.211 djm 495: result = -1;
496: goto out;
1.206 djm 497: }
498: len = strlen(arg);
499: if (strcasecmp(attrib, "host") == 0) {
500: if (match_hostname(host, arg, len) != 1)
501: result = 0;
502: else
503: debug("%.200s line %d: matched 'Host %.100s' ",
504: filename, linenum, host);
505: } else if (strcasecmp(attrib, "originalhost") == 0) {
506: if (match_hostname(host_arg, arg, len) != 1)
507: result = 0;
508: else
509: debug("%.200s line %d: matched "
510: "'OriginalHost %.100s' ",
511: filename, linenum, host_arg);
512: } else if (strcasecmp(attrib, "user") == 0) {
513: if (match_pattern_list(ruser, arg, len, 0) != 1)
514: result = 0;
515: else
516: debug("%.200s line %d: matched 'User %.100s' ",
517: filename, linenum, ruser);
518: } else if (strcasecmp(attrib, "localuser") == 0) {
519: if (match_pattern_list(pw->pw_name, arg, len, 0) != 1)
520: result = 0;
521: else
522: debug("%.200s line %d: matched "
523: "'LocalUser %.100s' ",
524: filename, linenum, pw->pw_name);
1.210 djm 525: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 526: if (gethostname(thishost, sizeof(thishost)) == -1)
527: fatal("gethostname: %s", strerror(errno));
528: strlcpy(shorthost, thishost, sizeof(shorthost));
529: shorthost[strcspn(thishost, ".")] = '\0';
530: snprintf(portstr, sizeof(portstr), "%d", port);
531:
532: cmd = percent_expand(arg,
533: "L", shorthost,
534: "d", pw->pw_dir,
535: "h", host,
536: "l", thishost,
537: "n", host_arg,
538: "p", portstr,
539: "r", ruser,
540: "u", pw->pw_name,
541: (char *)NULL);
1.217 djm 542: if (result != 1) {
543: /* skip execution if prior predicate failed */
544: debug("%.200s line %d: skipped exec \"%.100s\"",
1.206 djm 545: filename, linenum, cmd);
1.217 djm 546: } else {
547: r = execute_in_shell(cmd);
548: if (r == -1) {
549: fatal("%.200s line %d: match exec "
550: "'%.100s' error", filename,
551: linenum, cmd);
552: } else if (r == 0) {
553: debug("%.200s line %d: matched "
554: "'exec \"%.100s\"'", filename,
555: linenum, cmd);
556: } else {
557: debug("%.200s line %d: no match "
558: "'exec \"%.100s\"'", filename,
559: linenum, cmd);
560: result = 0;
561: }
562: }
1.206 djm 563: free(cmd);
564: } else {
565: error("Unsupported Match attribute %s", attrib);
1.211 djm 566: result = -1;
567: goto out;
1.206 djm 568: }
1.213 dtucker 569: }
570: if (attributes == 0) {
571: error("One or more attributes required for Match");
572: result = -1;
573: goto out;
1.206 djm 574: }
575: debug3("match %sfound", result ? "" : "not ");
576: *condition = cp;
1.211 djm 577: out:
578: free(host);
1.206 djm 579: return result;
580: }
581:
1.208 djm 582: /* Check and prepare a domain name: removes trailing '.' and lowercases */
583: static void
584: valid_domain(char *name, const char *filename, int linenum)
585: {
586: size_t i, l = strlen(name);
587: u_char c, last = '\0';
588:
589: if (l == 0)
590: fatal("%s line %d: empty hostname suffix", filename, linenum);
591: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
592: fatal("%s line %d: hostname suffix \"%.100s\" "
593: "starts with invalid character", filename, linenum, name);
594: for (i = 0; i < l; i++) {
595: c = tolower((u_char)name[i]);
596: name[i] = (char)c;
597: if (last == '.' && c == '.')
598: fatal("%s line %d: hostname suffix \"%.100s\" contains "
599: "consecutive separators", filename, linenum, name);
600: if (c != '.' && c != '-' && !isalnum(c) &&
601: c != '_') /* technically invalid, but common */
602: fatal("%s line %d: hostname suffix \"%.100s\" contains "
603: "invalid characters", filename, linenum, name);
604: last = c;
605: }
606: if (name[l - 1] == '.')
607: name[l - 1] = '\0';
608: }
609:
1.19 markus 610: /*
1.70 stevesk 611: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 612: */
1.26 markus 613: static OpCodes
1.199 djm 614: parse_token(const char *cp, const char *filename, int linenum,
615: const char *ignored_unknown)
1.1 deraadt 616: {
1.199 djm 617: int i;
1.1 deraadt 618:
1.17 markus 619: for (i = 0; keywords[i].name; i++)
1.199 djm 620: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 621: return keywords[i].opcode;
1.199 djm 622: if (ignored_unknown != NULL && match_pattern_list(cp, ignored_unknown,
623: strlen(ignored_unknown), 1) == 1)
624: return oIgnoredUnknownOption;
1.75 stevesk 625: error("%s: line %d: Bad configuration option: %s",
626: filename, linenum, cp);
1.17 markus 627: return oBadOption;
1.1 deraadt 628: }
629:
1.207 djm 630: /* Multistate option parsing */
631: struct multistate {
632: char *key;
633: int value;
634: };
635: static const struct multistate multistate_flag[] = {
636: { "true", 1 },
637: { "false", 0 },
638: { "yes", 1 },
639: { "no", 0 },
640: { NULL, -1 }
641: };
642: static const struct multistate multistate_yesnoask[] = {
643: { "true", 1 },
644: { "false", 0 },
645: { "yes", 1 },
646: { "no", 0 },
647: { "ask", 2 },
648: { NULL, -1 }
649: };
650: static const struct multistate multistate_addressfamily[] = {
651: { "inet", AF_INET },
652: { "inet6", AF_INET6 },
653: { "any", AF_UNSPEC },
654: { NULL, -1 }
655: };
656: static const struct multistate multistate_controlmaster[] = {
657: { "true", SSHCTL_MASTER_YES },
658: { "yes", SSHCTL_MASTER_YES },
659: { "false", SSHCTL_MASTER_NO },
660: { "no", SSHCTL_MASTER_NO },
661: { "auto", SSHCTL_MASTER_AUTO },
662: { "ask", SSHCTL_MASTER_ASK },
663: { "autoask", SSHCTL_MASTER_AUTO_ASK },
664: { NULL, -1 }
665: };
666: static const struct multistate multistate_tunnel[] = {
667: { "ethernet", SSH_TUNMODE_ETHERNET },
668: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
669: { "true", SSH_TUNMODE_DEFAULT },
670: { "yes", SSH_TUNMODE_DEFAULT },
671: { "false", SSH_TUNMODE_NO },
672: { "no", SSH_TUNMODE_NO },
673: { NULL, -1 }
674: };
675: static const struct multistate multistate_requesttty[] = {
676: { "true", REQUEST_TTY_YES },
677: { "yes", REQUEST_TTY_YES },
678: { "false", REQUEST_TTY_NO },
679: { "no", REQUEST_TTY_NO },
680: { "force", REQUEST_TTY_FORCE },
681: { "auto", REQUEST_TTY_AUTO },
682: { NULL, -1 }
683: };
1.209 djm 684: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 685: { "true", SSH_CANONICALISE_YES },
686: { "false", SSH_CANONICALISE_NO },
687: { "yes", SSH_CANONICALISE_YES },
688: { "no", SSH_CANONICALISE_NO },
689: { "always", SSH_CANONICALISE_ALWAYS },
690: { NULL, -1 }
691: };
1.207 djm 692:
1.19 markus 693: /*
694: * Processes a single option line as used in the configuration files. This
695: * only sets those values that have not already been set.
696: */
1.102 markus 697: #define WHITESPACE " \t\r\n"
1.14 markus 698: int
1.206 djm 699: process_config_line(Options *options, struct passwd *pw, const char *host,
700: char *line, const char *filename, int linenum, int *activep, int userconfig)
1.1 deraadt 701: {
1.193 djm 702: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
703: char **cpptr, fwdarg[256];
1.199 djm 704: u_int i, *uintptr, max_entries = 0;
1.206 djm 705: int negated, opcode, *intptr, value, value2, cmdline = 0;
1.164 dtucker 706: LogLevel *log_level_ptr;
1.201 dtucker 707: long long val64;
1.102 markus 708: size_t len;
1.135 djm 709: Forward fwd;
1.207 djm 710: const struct multistate *multistate_ptr;
1.208 djm 711: struct allowed_cname *cname;
1.106 djm 712:
1.206 djm 713: if (activep == NULL) { /* We are processing a command line directive */
714: cmdline = 1;
715: activep = &cmdline;
716: }
717:
1.106 djm 718: /* Strip trailing whitespace */
1.139 deraadt 719: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 720: if (strchr(WHITESPACE, line[len]) == NULL)
721: break;
722: line[len] = '\0';
723: }
1.1 deraadt 724:
1.42 provos 725: s = line;
726: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 727: if ((keyword = strdelim(&s)) == NULL)
728: return 0;
1.42 provos 729: /* Ignore leading whitespace. */
730: if (*keyword == '\0')
1.43 markus 731: keyword = strdelim(&s);
1.56 deraadt 732: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 733: return 0;
1.199 djm 734: /* Match lowercase keyword */
1.207 djm 735: lowercase(keyword);
1.17 markus 736:
1.199 djm 737: opcode = parse_token(keyword, filename, linenum,
738: options->ignored_unknown);
1.17 markus 739:
740: switch (opcode) {
741: case oBadOption:
1.19 markus 742: /* don't panic, but count bad options */
743: return -1;
1.17 markus 744: /* NOTREACHED */
1.199 djm 745: case oIgnoredUnknownOption:
746: debug("%s line %d: Ignored unknown option \"%s\"",
747: filename, linenum, keyword);
748: return 0;
1.111 djm 749: case oConnectTimeout:
750: intptr = &options->connection_timeout;
1.127 markus 751: parse_time:
1.111 djm 752: arg = strdelim(&s);
753: if (!arg || *arg == '\0')
754: fatal("%s line %d: missing time value.",
755: filename, linenum);
756: if ((value = convtime(arg)) == -1)
757: fatal("%s line %d: invalid time value.",
758: filename, linenum);
1.160 dtucker 759: if (*activep && *intptr == -1)
1.111 djm 760: *intptr = value;
761: break;
762:
1.17 markus 763: case oForwardAgent:
764: intptr = &options->forward_agent;
1.207 djm 765: parse_flag:
766: multistate_ptr = multistate_flag;
767: parse_multistate:
1.42 provos 768: arg = strdelim(&s);
1.40 ho 769: if (!arg || *arg == '\0')
1.207 djm 770: fatal("%s line %d: missing argument.",
771: filename, linenum);
772: value = -1;
773: for (i = 0; multistate_ptr[i].key != NULL; i++) {
774: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
775: value = multistate_ptr[i].value;
776: break;
777: }
778: }
779: if (value == -1)
780: fatal("%s line %d: unsupported option \"%s\".",
781: filename, linenum, arg);
1.17 markus 782: if (*activep && *intptr == -1)
783: *intptr = value;
784: break;
785:
786: case oForwardX11:
787: intptr = &options->forward_x11;
788: goto parse_flag;
789:
1.123 markus 790: case oForwardX11Trusted:
791: intptr = &options->forward_x11_trusted;
792: goto parse_flag;
1.186 djm 793:
794: case oForwardX11Timeout:
795: intptr = &options->forward_x11_timeout;
796: goto parse_time;
1.123 markus 797:
1.17 markus 798: case oGatewayPorts:
799: intptr = &options->gateway_ports;
800: goto parse_flag;
801:
1.153 markus 802: case oExitOnForwardFailure:
803: intptr = &options->exit_on_forward_failure;
804: goto parse_flag;
805:
1.17 markus 806: case oUsePrivilegedPort:
807: intptr = &options->use_privileged_port;
808: goto parse_flag;
809:
810: case oPasswordAuthentication:
811: intptr = &options->password_authentication;
812: goto parse_flag;
813:
1.48 markus 814: case oKbdInteractiveAuthentication:
815: intptr = &options->kbd_interactive_authentication;
816: goto parse_flag;
817:
818: case oKbdInteractiveDevices:
819: charptr = &options->kbd_interactive_devices;
820: goto parse_string;
821:
1.50 markus 822: case oPubkeyAuthentication:
823: intptr = &options->pubkey_authentication;
1.30 markus 824: goto parse_flag;
825:
1.17 markus 826: case oRSAAuthentication:
827: intptr = &options->rsa_authentication;
828: goto parse_flag;
829:
830: case oRhostsRSAAuthentication:
831: intptr = &options->rhosts_rsa_authentication;
832: goto parse_flag;
833:
1.72 markus 834: case oHostbasedAuthentication:
835: intptr = &options->hostbased_authentication;
836: goto parse_flag;
837:
1.59 markus 838: case oChallengeResponseAuthentication:
1.78 markus 839: intptr = &options->challenge_response_authentication;
1.17 markus 840: goto parse_flag;
1.108 jakob 841:
1.118 markus 842: case oGssAuthentication:
843: intptr = &options->gss_authentication;
844: goto parse_flag;
845:
846: case oGssDelegateCreds:
847: intptr = &options->gss_deleg_creds;
848: goto parse_flag;
849:
1.17 markus 850: case oBatchMode:
851: intptr = &options->batch_mode;
852: goto parse_flag;
853:
854: case oCheckHostIP:
855: intptr = &options->check_host_ip;
1.167 grunk 856: goto parse_flag;
1.17 markus 857:
1.107 jakob 858: case oVerifyHostKeyDNS:
859: intptr = &options->verify_host_key_dns;
1.207 djm 860: multistate_ptr = multistate_yesnoask;
861: goto parse_multistate;
1.107 jakob 862:
1.17 markus 863: case oStrictHostKeyChecking:
864: intptr = &options->strict_host_key_checking;
1.207 djm 865: multistate_ptr = multistate_yesnoask;
866: goto parse_multistate;
1.17 markus 867:
868: case oCompression:
869: intptr = &options->compression;
870: goto parse_flag;
871:
1.126 markus 872: case oTCPKeepAlive:
873: intptr = &options->tcp_keep_alive;
1.17 markus 874: goto parse_flag;
875:
1.91 markus 876: case oNoHostAuthenticationForLocalhost:
877: intptr = &options->no_host_authentication_for_localhost;
878: goto parse_flag;
879:
1.17 markus 880: case oNumberOfPasswordPrompts:
881: intptr = &options->number_of_password_prompts;
882: goto parse_int;
883:
884: case oCompressionLevel:
885: intptr = &options->compression_level;
886: goto parse_int;
887:
1.105 markus 888: case oRekeyLimit:
889: arg = strdelim(&s);
890: if (!arg || *arg == '\0')
1.198 dtucker 891: fatal("%.200s line %d: Missing argument.", filename,
892: linenum);
893: if (strcmp(arg, "default") == 0) {
894: val64 = 0;
895: } else {
1.200 dtucker 896: if (scan_scaled(arg, &val64) == -1)
897: fatal("%.200s line %d: Bad number '%s': %s",
898: filename, linenum, arg, strerror(errno));
899: /* check for too-large or too-small limits */
900: if (val64 > UINT_MAX)
1.198 dtucker 901: fatal("%.200s line %d: RekeyLimit too large",
902: filename, linenum);
903: if (val64 != 0 && val64 < 16)
904: fatal("%.200s line %d: RekeyLimit too small",
905: filename, linenum);
1.105 markus 906: }
1.165 djm 907: if (*activep && options->rekey_limit == -1)
908: options->rekey_limit = (u_int32_t)val64;
1.198 dtucker 909: if (s != NULL) { /* optional rekey interval present */
910: if (strcmp(s, "none") == 0) {
911: (void)strdelim(&s); /* discard */
912: break;
913: }
914: intptr = &options->rekey_interval;
915: goto parse_time;
916: }
1.105 markus 917: break;
918:
1.17 markus 919: case oIdentityFile:
1.42 provos 920: arg = strdelim(&s);
1.40 ho 921: if (!arg || *arg == '\0')
1.17 markus 922: fatal("%.200s line %d: Missing argument.", filename, linenum);
923: if (*activep) {
1.50 markus 924: intptr = &options->num_identity_files;
1.27 markus 925: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 926: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 927: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.196 dtucker 928: add_identity_file(options, NULL, arg, userconfig);
1.17 markus 929: }
930: break;
931:
1.34 markus 932: case oXAuthLocation:
933: charptr=&options->xauth_location;
934: goto parse_string;
935:
1.17 markus 936: case oUser:
937: charptr = &options->user;
938: parse_string:
1.42 provos 939: arg = strdelim(&s);
1.40 ho 940: if (!arg || *arg == '\0')
1.193 djm 941: fatal("%.200s line %d: Missing argument.",
942: filename, linenum);
1.17 markus 943: if (*activep && *charptr == NULL)
1.38 provos 944: *charptr = xstrdup(arg);
1.17 markus 945: break;
946:
947: case oGlobalKnownHostsFile:
1.193 djm 948: cpptr = (char **)&options->system_hostfiles;
949: uintptr = &options->num_system_hostfiles;
950: max_entries = SSH_MAX_HOSTS_FILES;
951: parse_char_array:
952: if (*activep && *uintptr == 0) {
953: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
954: if ((*uintptr) >= max_entries)
955: fatal("%s line %d: "
956: "too many authorized keys files.",
957: filename, linenum);
958: cpptr[(*uintptr)++] = xstrdup(arg);
959: }
960: }
961: return 0;
1.17 markus 962:
963: case oUserKnownHostsFile:
1.193 djm 964: cpptr = (char **)&options->user_hostfiles;
965: uintptr = &options->num_user_hostfiles;
966: max_entries = SSH_MAX_HOSTS_FILES;
967: goto parse_char_array;
1.27 markus 968:
1.17 markus 969: case oHostName:
970: charptr = &options->hostname;
971: goto parse_string;
972:
1.52 markus 973: case oHostKeyAlias:
974: charptr = &options->host_key_alias;
975: goto parse_string;
976:
1.67 markus 977: case oPreferredAuthentications:
978: charptr = &options->preferred_authentications;
979: goto parse_string;
980:
1.77 markus 981: case oBindAddress:
982: charptr = &options->bind_address;
983: goto parse_string;
984:
1.183 markus 985: case oPKCS11Provider:
986: charptr = &options->pkcs11_provider;
1.86 markus 987: goto parse_string;
1.85 jakob 988:
1.17 markus 989: case oProxyCommand:
1.144 reyk 990: charptr = &options->proxy_command;
991: parse_command:
1.113 markus 992: if (s == NULL)
993: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 994: len = strspn(s, WHITESPACE "=");
1.17 markus 995: if (*activep && *charptr == NULL)
1.102 markus 996: *charptr = xstrdup(s + len);
1.17 markus 997: return 0;
998:
999: case oPort:
1000: intptr = &options->port;
1001: parse_int:
1.42 provos 1002: arg = strdelim(&s);
1.40 ho 1003: if (!arg || *arg == '\0')
1.17 markus 1004: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1005: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 1006: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 1007:
1008: /* Octal, decimal, or hex format? */
1.38 provos 1009: value = strtol(arg, &endofnumber, 0);
1010: if (arg == endofnumber)
1.21 markus 1011: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 1012: if (*activep && *intptr == -1)
1013: *intptr = value;
1014: break;
1015:
1016: case oConnectionAttempts:
1017: intptr = &options->connection_attempts;
1018: goto parse_int;
1019:
1020: case oCipher:
1021: intptr = &options->cipher;
1.42 provos 1022: arg = strdelim(&s);
1.40 ho 1023: if (!arg || *arg == '\0')
1.32 markus 1024: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1025: value = cipher_number(arg);
1.17 markus 1026: if (value == -1)
1027: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 1028: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 1029: if (*activep && *intptr == -1)
1030: *intptr = value;
1031: break;
1032:
1.25 markus 1033: case oCiphers:
1.42 provos 1034: arg = strdelim(&s);
1.40 ho 1035: if (!arg || *arg == '\0')
1.32 markus 1036: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1037: if (!ciphers_valid(arg))
1.31 markus 1038: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1039: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1040: if (*activep && options->ciphers == NULL)
1.38 provos 1041: options->ciphers = xstrdup(arg);
1.25 markus 1042: break;
1043:
1.62 markus 1044: case oMacs:
1045: arg = strdelim(&s);
1046: if (!arg || *arg == '\0')
1047: fatal("%.200s line %d: Missing argument.", filename, linenum);
1048: if (!mac_valid(arg))
1049: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1050: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1051: if (*activep && options->macs == NULL)
1052: options->macs = xstrdup(arg);
1053: break;
1054:
1.189 djm 1055: case oKexAlgorithms:
1056: arg = strdelim(&s);
1057: if (!arg || *arg == '\0')
1058: fatal("%.200s line %d: Missing argument.",
1059: filename, linenum);
1060: if (!kex_names_valid(arg))
1061: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1062: filename, linenum, arg ? arg : "<NONE>");
1063: if (*activep && options->kex_algorithms == NULL)
1064: options->kex_algorithms = xstrdup(arg);
1065: break;
1066:
1.76 markus 1067: case oHostKeyAlgorithms:
1068: arg = strdelim(&s);
1069: if (!arg || *arg == '\0')
1070: fatal("%.200s line %d: Missing argument.", filename, linenum);
1071: if (!key_names_valid2(arg))
1072: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 1073: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 1074: if (*activep && options->hostkeyalgorithms == NULL)
1075: options->hostkeyalgorithms = xstrdup(arg);
1076: break;
1077:
1.25 markus 1078: case oProtocol:
1079: intptr = &options->protocol;
1.42 provos 1080: arg = strdelim(&s);
1.40 ho 1081: if (!arg || *arg == '\0')
1.32 markus 1082: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1083: value = proto_spec(arg);
1.25 markus 1084: if (value == SSH_PROTO_UNKNOWN)
1085: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 1086: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1087: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
1088: *intptr = value;
1089: break;
1090:
1.17 markus 1091: case oLogLevel:
1.164 dtucker 1092: log_level_ptr = &options->log_level;
1.42 provos 1093: arg = strdelim(&s);
1.38 provos 1094: value = log_level_number(arg);
1.95 markus 1095: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1096: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1097: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1098: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1099: *log_level_ptr = (LogLevel) value;
1.17 markus 1100: break;
1101:
1.88 stevesk 1102: case oLocalForward:
1.17 markus 1103: case oRemoteForward:
1.168 stevesk 1104: case oDynamicForward:
1.42 provos 1105: arg = strdelim(&s);
1.135 djm 1106: if (arg == NULL || *arg == '\0')
1.88 stevesk 1107: fatal("%.200s line %d: Missing port argument.",
1108: filename, linenum);
1.135 djm 1109:
1.168 stevesk 1110: if (opcode == oLocalForward ||
1111: opcode == oRemoteForward) {
1112: arg2 = strdelim(&s);
1113: if (arg2 == NULL || *arg2 == '\0')
1114: fatal("%.200s line %d: Missing target argument.",
1115: filename, linenum);
1.135 djm 1116:
1.168 stevesk 1117: /* construct a string for parse_forward */
1118: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1119: } else if (opcode == oDynamicForward) {
1120: strlcpy(fwdarg, arg, sizeof(fwdarg));
1121: }
1122:
1123: if (parse_forward(&fwd, fwdarg,
1.176 djm 1124: opcode == oDynamicForward ? 1 : 0,
1125: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1126: fatal("%.200s line %d: Bad forwarding specification.",
1127: filename, linenum);
1.135 djm 1128:
1.88 stevesk 1129: if (*activep) {
1.168 stevesk 1130: if (opcode == oLocalForward ||
1131: opcode == oDynamicForward)
1.135 djm 1132: add_local_forward(options, &fwd);
1.88 stevesk 1133: else if (opcode == oRemoteForward)
1.135 djm 1134: add_remote_forward(options, &fwd);
1.88 stevesk 1135: }
1.17 markus 1136: break;
1.71 markus 1137:
1.90 stevesk 1138: case oClearAllForwardings:
1139: intptr = &options->clear_forwardings;
1140: goto parse_flag;
1141:
1.17 markus 1142: case oHost:
1.206 djm 1143: if (cmdline)
1144: fatal("Host directive not supported as a command-line "
1145: "option");
1.17 markus 1146: *activep = 0;
1.191 djm 1147: arg2 = NULL;
1148: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1149: negated = *arg == '!';
1150: if (negated)
1151: arg++;
1.38 provos 1152: if (match_pattern(host, arg)) {
1.191 djm 1153: if (negated) {
1154: debug("%.200s line %d: Skipping Host "
1155: "block because of negated match "
1156: "for %.100s", filename, linenum,
1157: arg);
1158: *activep = 0;
1159: break;
1160: }
1161: if (!*activep)
1162: arg2 = arg; /* logged below */
1.17 markus 1163: *activep = 1;
1164: }
1.191 djm 1165: }
1166: if (*activep)
1167: debug("%.200s line %d: Applying options for %.100s",
1168: filename, linenum, arg2);
1.42 provos 1169: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1170: return 0;
1171:
1.206 djm 1172: case oMatch:
1173: if (cmdline)
1174: fatal("Host directive not supported as a command-line "
1175: "option");
1176: value = match_cfg_line(options, &s, pw, host,
1177: filename, linenum);
1178: if (value < 0)
1179: fatal("%.200s line %d: Bad Match condition", filename,
1180: linenum);
1181: *activep = value;
1182: break;
1183:
1.17 markus 1184: case oEscapeChar:
1185: intptr = &options->escape_char;
1.42 provos 1186: arg = strdelim(&s);
1.40 ho 1187: if (!arg || *arg == '\0')
1.17 markus 1188: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1189: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1190: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1191: value = (u_char) arg[1] & 31;
1.38 provos 1192: else if (strlen(arg) == 1)
1.51 markus 1193: value = (u_char) arg[0];
1.38 provos 1194: else if (strcmp(arg, "none") == 0)
1.79 stevesk 1195: value = SSH_ESCAPECHAR_NONE;
1.17 markus 1196: else {
1197: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1198: filename, linenum);
1.17 markus 1199: /* NOTREACHED */
1200: value = 0; /* Avoid compiler warning. */
1201: }
1202: if (*activep && *intptr == -1)
1203: *intptr = value;
1.112 djm 1204: break;
1205:
1206: case oAddressFamily:
1.114 djm 1207: intptr = &options->address_family;
1.207 djm 1208: multistate_ptr = multistate_addressfamily;
1209: goto parse_multistate;
1.17 markus 1210:
1.101 markus 1211: case oEnableSSHKeysign:
1212: intptr = &options->enable_ssh_keysign;
1213: goto parse_flag;
1214:
1.128 markus 1215: case oIdentitiesOnly:
1216: intptr = &options->identities_only;
1217: goto parse_flag;
1218:
1.127 markus 1219: case oServerAliveInterval:
1220: intptr = &options->server_alive_interval;
1221: goto parse_time;
1222:
1223: case oServerAliveCountMax:
1224: intptr = &options->server_alive_count_max;
1225: goto parse_int;
1226:
1.130 djm 1227: case oSendEnv:
1228: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1229: if (strchr(arg, '=') != NULL)
1230: fatal("%s line %d: Invalid environment name.",
1231: filename, linenum);
1.137 djm 1232: if (!*activep)
1233: continue;
1.130 djm 1234: if (options->num_send_env >= MAX_SEND_ENV)
1235: fatal("%s line %d: too many send env.",
1236: filename, linenum);
1237: options->send_env[options->num_send_env++] =
1238: xstrdup(arg);
1239: }
1240: break;
1241:
1.132 djm 1242: case oControlPath:
1243: charptr = &options->control_path;
1244: goto parse_string;
1245:
1246: case oControlMaster:
1247: intptr = &options->control_master;
1.207 djm 1248: multistate_ptr = multistate_controlmaster;
1249: goto parse_multistate;
1.132 djm 1250:
1.187 djm 1251: case oControlPersist:
1252: /* no/false/yes/true, or a time spec */
1253: intptr = &options->control_persist;
1254: arg = strdelim(&s);
1255: if (!arg || *arg == '\0')
1256: fatal("%.200s line %d: Missing ControlPersist"
1257: " argument.", filename, linenum);
1258: value = 0;
1259: value2 = 0; /* timeout */
1260: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1261: value = 0;
1262: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1263: value = 1;
1264: else if ((value2 = convtime(arg)) >= 0)
1265: value = 1;
1266: else
1267: fatal("%.200s line %d: Bad ControlPersist argument.",
1268: filename, linenum);
1269: if (*activep && *intptr == -1) {
1270: *intptr = value;
1271: options->control_persist_timeout = value2;
1272: }
1273: break;
1274:
1.136 djm 1275: case oHashKnownHosts:
1276: intptr = &options->hash_known_hosts;
1277: goto parse_flag;
1278:
1.144 reyk 1279: case oTunnel:
1280: intptr = &options->tun_open;
1.207 djm 1281: multistate_ptr = multistate_tunnel;
1282: goto parse_multistate;
1.144 reyk 1283:
1284: case oTunnelDevice:
1285: arg = strdelim(&s);
1286: if (!arg || *arg == '\0')
1287: fatal("%.200s line %d: Missing argument.", filename, linenum);
1288: value = a2tun(arg, &value2);
1.145 reyk 1289: if (value == SSH_TUNID_ERR)
1.144 reyk 1290: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1291: if (*activep) {
1292: options->tun_local = value;
1293: options->tun_remote = value2;
1294: }
1295: break;
1296:
1297: case oLocalCommand:
1298: charptr = &options->local_command;
1299: goto parse_command;
1300:
1301: case oPermitLocalCommand:
1302: intptr = &options->permit_local_command;
1303: goto parse_flag;
1304:
1.167 grunk 1305: case oVisualHostKey:
1306: intptr = &options->visual_host_key;
1307: goto parse_flag;
1308:
1.190 djm 1309: case oIPQoS:
1310: arg = strdelim(&s);
1311: if ((value = parse_ipqos(arg)) == -1)
1312: fatal("%s line %d: Bad IPQoS value: %s",
1313: filename, linenum, arg);
1314: arg = strdelim(&s);
1315: if (arg == NULL)
1316: value2 = value;
1317: else if ((value2 = parse_ipqos(arg)) == -1)
1318: fatal("%s line %d: Bad IPQoS value: %s",
1319: filename, linenum, arg);
1320: if (*activep) {
1321: options->ip_qos_interactive = value;
1322: options->ip_qos_bulk = value2;
1323: }
1324: break;
1325:
1.177 andreas 1326: case oUseRoaming:
1327: intptr = &options->use_roaming;
1328: goto parse_flag;
1329:
1.192 djm 1330: case oRequestTTY:
1331: intptr = &options->request_tty;
1.207 djm 1332: multistate_ptr = multistate_requesttty;
1333: goto parse_multistate;
1.192 djm 1334:
1.199 djm 1335: case oIgnoreUnknown:
1336: charptr = &options->ignored_unknown;
1337: goto parse_string;
1338:
1.205 djm 1339: case oProxyUseFdpass:
1340: intptr = &options->proxy_use_fdpass;
1341: goto parse_flag;
1342:
1.208 djm 1343: case oCanonicalDomains:
1344: value = options->num_canonical_domains != 0;
1345: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1346: valid_domain(arg, filename, linenum);
1347: if (!*activep || value)
1348: continue;
1349: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1350: fatal("%s line %d: too many hostname suffixes.",
1351: filename, linenum);
1352: options->canonical_domains[
1353: options->num_canonical_domains++] = xstrdup(arg);
1354: }
1355: break;
1356:
1.209 djm 1357: case oCanonicalizePermittedCNAMEs:
1.208 djm 1358: value = options->num_permitted_cnames != 0;
1359: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1360: /* Either '*' for everything or 'list:list' */
1361: if (strcmp(arg, "*") == 0)
1362: arg2 = arg;
1363: else {
1364: lowercase(arg);
1365: if ((arg2 = strchr(arg, ':')) == NULL ||
1366: arg2[1] == '\0') {
1367: fatal("%s line %d: "
1368: "Invalid permitted CNAME \"%s\"",
1369: filename, linenum, arg);
1370: }
1371: *arg2 = '\0';
1372: arg2++;
1373: }
1374: if (!*activep || value)
1375: continue;
1376: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1377: fatal("%s line %d: too many permitted CNAMEs.",
1378: filename, linenum);
1379: cname = options->permitted_cnames +
1380: options->num_permitted_cnames++;
1381: cname->source_list = xstrdup(arg);
1382: cname->target_list = xstrdup(arg2);
1383: }
1384: break;
1385:
1.209 djm 1386: case oCanonicalizeHostname:
1387: intptr = &options->canonicalize_hostname;
1388: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1389: goto parse_multistate;
1390:
1.209 djm 1391: case oCanonicalizeMaxDots:
1392: intptr = &options->canonicalize_max_dots;
1.208 djm 1393: goto parse_int;
1394:
1.209 djm 1395: case oCanonicalizeFallbackLocal:
1396: intptr = &options->canonicalize_fallback_local;
1.208 djm 1397: goto parse_flag;
1398:
1.96 markus 1399: case oDeprecated:
1.98 markus 1400: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1401: filename, linenum, keyword);
1.98 markus 1402: return 0;
1.96 markus 1403:
1.110 jakob 1404: case oUnsupported:
1405: error("%s line %d: Unsupported option \"%s\"",
1406: filename, linenum, keyword);
1407: return 0;
1408:
1.17 markus 1409: default:
1410: fatal("process_config_line: Unimplemented opcode %d", opcode);
1411: }
1412:
1413: /* Check that there is no garbage at end of line. */
1.57 djm 1414: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1415: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1416: filename, linenum, arg);
1.39 ho 1417: }
1.17 markus 1418: return 0;
1.1 deraadt 1419: }
1420:
1421:
1.19 markus 1422: /*
1423: * Reads the config file and modifies the options accordingly. Options
1424: * should already be initialized before this call. This never returns if
1.89 stevesk 1425: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1426: */
1.1 deraadt 1427:
1.89 stevesk 1428: int
1.206 djm 1429: read_config_file(const char *filename, struct passwd *pw, const char *host,
1430: Options *options, int flags)
1.1 deraadt 1431: {
1.17 markus 1432: FILE *f;
1433: char line[1024];
1434: int active, linenum;
1435: int bad_options = 0;
1436:
1.129 djm 1437: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1438: return 0;
1.129 djm 1439:
1.196 dtucker 1440: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1441: struct stat sb;
1.134 deraadt 1442:
1.131 dtucker 1443: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1444: fatal("fstat %s: %s", filename, strerror(errno));
1445: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1446: (sb.st_mode & 022) != 0))
1.129 djm 1447: fatal("Bad owner or permissions on %s", filename);
1448: }
1.17 markus 1449:
1450: debug("Reading configuration data %.200s", filename);
1451:
1.19 markus 1452: /*
1453: * Mark that we are now processing the options. This flag is turned
1454: * on/off by Host specifications.
1455: */
1.17 markus 1456: active = 1;
1457: linenum = 0;
1458: while (fgets(line, sizeof(line), f)) {
1459: /* Update line number counter. */
1460: linenum++;
1.206 djm 1461: if (process_config_line(options, pw, host, line, filename,
1462: linenum, &active, flags & SSHCONF_USERCONF) != 0)
1.17 markus 1463: bad_options++;
1464: }
1465: fclose(f);
1466: if (bad_options > 0)
1.64 millert 1467: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1468: filename, bad_options);
1.89 stevesk 1469: return 1;
1.1 deraadt 1470: }
1471:
1.218 djm 1472: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1473: int
1474: option_clear_or_none(const char *o)
1475: {
1476: return o == NULL || strcasecmp(o, "none") == 0;
1477: }
1478:
1.19 markus 1479: /*
1480: * Initializes options to special values that indicate that they have not yet
1481: * been set. Read_config_file will only set options with this value. Options
1482: * are processed in the following order: command line, user config file,
1483: * system config file. Last, fill_default_options is called.
1484: */
1.1 deraadt 1485:
1.26 markus 1486: void
1.17 markus 1487: initialize_options(Options * options)
1.1 deraadt 1488: {
1.17 markus 1489: memset(options, 'X', sizeof(*options));
1490: options->forward_agent = -1;
1491: options->forward_x11 = -1;
1.123 markus 1492: options->forward_x11_trusted = -1;
1.186 djm 1493: options->forward_x11_timeout = -1;
1.153 markus 1494: options->exit_on_forward_failure = -1;
1.34 markus 1495: options->xauth_location = NULL;
1.17 markus 1496: options->gateway_ports = -1;
1497: options->use_privileged_port = -1;
1498: options->rsa_authentication = -1;
1.50 markus 1499: options->pubkey_authentication = -1;
1.78 markus 1500: options->challenge_response_authentication = -1;
1.118 markus 1501: options->gss_authentication = -1;
1502: options->gss_deleg_creds = -1;
1.17 markus 1503: options->password_authentication = -1;
1.48 markus 1504: options->kbd_interactive_authentication = -1;
1505: options->kbd_interactive_devices = NULL;
1.17 markus 1506: options->rhosts_rsa_authentication = -1;
1.72 markus 1507: options->hostbased_authentication = -1;
1.17 markus 1508: options->batch_mode = -1;
1509: options->check_host_ip = -1;
1510: options->strict_host_key_checking = -1;
1511: options->compression = -1;
1.126 markus 1512: options->tcp_keep_alive = -1;
1.17 markus 1513: options->compression_level = -1;
1514: options->port = -1;
1.114 djm 1515: options->address_family = -1;
1.17 markus 1516: options->connection_attempts = -1;
1.111 djm 1517: options->connection_timeout = -1;
1.17 markus 1518: options->number_of_password_prompts = -1;
1519: options->cipher = -1;
1.25 markus 1520: options->ciphers = NULL;
1.62 markus 1521: options->macs = NULL;
1.189 djm 1522: options->kex_algorithms = NULL;
1.76 markus 1523: options->hostkeyalgorithms = NULL;
1.25 markus 1524: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1525: options->num_identity_files = 0;
1526: options->hostname = NULL;
1.52 markus 1527: options->host_key_alias = NULL;
1.17 markus 1528: options->proxy_command = NULL;
1529: options->user = NULL;
1530: options->escape_char = -1;
1.193 djm 1531: options->num_system_hostfiles = 0;
1532: options->num_user_hostfiles = 0;
1.185 djm 1533: options->local_forwards = NULL;
1.17 markus 1534: options->num_local_forwards = 0;
1.185 djm 1535: options->remote_forwards = NULL;
1.17 markus 1536: options->num_remote_forwards = 0;
1.90 stevesk 1537: options->clear_forwardings = -1;
1.95 markus 1538: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1539: options->preferred_authentications = NULL;
1.77 markus 1540: options->bind_address = NULL;
1.183 markus 1541: options->pkcs11_provider = NULL;
1.101 markus 1542: options->enable_ssh_keysign = - 1;
1.91 markus 1543: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1544: options->identities_only = - 1;
1.105 markus 1545: options->rekey_limit = - 1;
1.198 dtucker 1546: options->rekey_interval = -1;
1.107 jakob 1547: options->verify_host_key_dns = -1;
1.127 markus 1548: options->server_alive_interval = -1;
1549: options->server_alive_count_max = -1;
1.130 djm 1550: options->num_send_env = 0;
1.132 djm 1551: options->control_path = NULL;
1552: options->control_master = -1;
1.187 djm 1553: options->control_persist = -1;
1554: options->control_persist_timeout = 0;
1.136 djm 1555: options->hash_known_hosts = -1;
1.144 reyk 1556: options->tun_open = -1;
1557: options->tun_local = -1;
1558: options->tun_remote = -1;
1559: options->local_command = NULL;
1560: options->permit_local_command = -1;
1.177 andreas 1561: options->use_roaming = -1;
1.167 grunk 1562: options->visual_host_key = -1;
1.190 djm 1563: options->ip_qos_interactive = -1;
1564: options->ip_qos_bulk = -1;
1.192 djm 1565: options->request_tty = -1;
1.205 djm 1566: options->proxy_use_fdpass = -1;
1.199 djm 1567: options->ignored_unknown = NULL;
1.208 djm 1568: options->num_canonical_domains = 0;
1569: options->num_permitted_cnames = 0;
1.209 djm 1570: options->canonicalize_max_dots = -1;
1571: options->canonicalize_fallback_local = -1;
1572: options->canonicalize_hostname = -1;
1.1 deraadt 1573: }
1574:
1.19 markus 1575: /*
1.218 djm 1576: * A petite version of fill_default_options() that just fills the options
1577: * needed for hostname canonicalization to proceed.
1578: */
1579: void
1580: fill_default_options_for_canonicalization(Options *options)
1581: {
1582: if (options->canonicalize_max_dots == -1)
1583: options->canonicalize_max_dots = 1;
1584: if (options->canonicalize_fallback_local == -1)
1585: options->canonicalize_fallback_local = 1;
1586: if (options->canonicalize_hostname == -1)
1587: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1588: }
1589:
1590: /*
1.19 markus 1591: * Called after processing other sources of option data, this fills those
1592: * options for which no value has been specified with their default values.
1593: */
1.26 markus 1594: void
1.17 markus 1595: fill_default_options(Options * options)
1.1 deraadt 1596: {
1.17 markus 1597: if (options->forward_agent == -1)
1.33 markus 1598: options->forward_agent = 0;
1.17 markus 1599: if (options->forward_x11 == -1)
1.23 markus 1600: options->forward_x11 = 0;
1.123 markus 1601: if (options->forward_x11_trusted == -1)
1602: options->forward_x11_trusted = 0;
1.186 djm 1603: if (options->forward_x11_timeout == -1)
1604: options->forward_x11_timeout = 1200;
1.153 markus 1605: if (options->exit_on_forward_failure == -1)
1606: options->exit_on_forward_failure = 0;
1.34 markus 1607: if (options->xauth_location == NULL)
1.80 markus 1608: options->xauth_location = _PATH_XAUTH;
1.17 markus 1609: if (options->gateway_ports == -1)
1610: options->gateway_ports = 0;
1611: if (options->use_privileged_port == -1)
1.65 markus 1612: options->use_privileged_port = 0;
1.17 markus 1613: if (options->rsa_authentication == -1)
1614: options->rsa_authentication = 1;
1.50 markus 1615: if (options->pubkey_authentication == -1)
1616: options->pubkey_authentication = 1;
1.78 markus 1617: if (options->challenge_response_authentication == -1)
1.83 markus 1618: options->challenge_response_authentication = 1;
1.118 markus 1619: if (options->gss_authentication == -1)
1.122 markus 1620: options->gss_authentication = 0;
1.118 markus 1621: if (options->gss_deleg_creds == -1)
1622: options->gss_deleg_creds = 0;
1.17 markus 1623: if (options->password_authentication == -1)
1624: options->password_authentication = 1;
1.48 markus 1625: if (options->kbd_interactive_authentication == -1)
1.59 markus 1626: options->kbd_interactive_authentication = 1;
1.17 markus 1627: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1628: options->rhosts_rsa_authentication = 0;
1.72 markus 1629: if (options->hostbased_authentication == -1)
1630: options->hostbased_authentication = 0;
1.17 markus 1631: if (options->batch_mode == -1)
1632: options->batch_mode = 0;
1633: if (options->check_host_ip == -1)
1634: options->check_host_ip = 1;
1635: if (options->strict_host_key_checking == -1)
1636: options->strict_host_key_checking = 2; /* 2 is default */
1637: if (options->compression == -1)
1638: options->compression = 0;
1.126 markus 1639: if (options->tcp_keep_alive == -1)
1640: options->tcp_keep_alive = 1;
1.17 markus 1641: if (options->compression_level == -1)
1642: options->compression_level = 6;
1643: if (options->port == -1)
1644: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1645: if (options->address_family == -1)
1646: options->address_family = AF_UNSPEC;
1.17 markus 1647: if (options->connection_attempts == -1)
1.84 markus 1648: options->connection_attempts = 1;
1.17 markus 1649: if (options->number_of_password_prompts == -1)
1650: options->number_of_password_prompts = 3;
1651: /* Selected in ssh_login(). */
1652: if (options->cipher == -1)
1653: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1654: /* options->ciphers, default set in myproposals.h */
1.62 markus 1655: /* options->macs, default set in myproposals.h */
1.189 djm 1656: /* options->kex_algorithms, default set in myproposals.h */
1.76 markus 1657: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1658: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1659: options->protocol = SSH_PROTO_2;
1.17 markus 1660: if (options->num_identity_files == 0) {
1.50 markus 1661: if (options->protocol & SSH_PROTO_1) {
1.195 dtucker 1662: add_identity_file(options, "~/",
1663: _PATH_SSH_CLIENT_IDENTITY, 0);
1.50 markus 1664: }
1665: if (options->protocol & SSH_PROTO_2) {
1.195 dtucker 1666: add_identity_file(options, "~/",
1667: _PATH_SSH_CLIENT_ID_RSA, 0);
1668: add_identity_file(options, "~/",
1669: _PATH_SSH_CLIENT_ID_DSA, 0);
1670: add_identity_file(options, "~/",
1671: _PATH_SSH_CLIENT_ID_ECDSA, 0);
1.215 markus 1672: add_identity_file(options, "~/",
1673: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.50 markus 1674: }
1.27 markus 1675: }
1.17 markus 1676: if (options->escape_char == -1)
1677: options->escape_char = '~';
1.193 djm 1678: if (options->num_system_hostfiles == 0) {
1679: options->system_hostfiles[options->num_system_hostfiles++] =
1680: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1681: options->system_hostfiles[options->num_system_hostfiles++] =
1682: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1683: }
1684: if (options->num_user_hostfiles == 0) {
1685: options->user_hostfiles[options->num_user_hostfiles++] =
1686: xstrdup(_PATH_SSH_USER_HOSTFILE);
1687: options->user_hostfiles[options->num_user_hostfiles++] =
1688: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1689: }
1.95 markus 1690: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1691: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1692: if (options->clear_forwardings == 1)
1693: clear_forwardings(options);
1.91 markus 1694: if (options->no_host_authentication_for_localhost == - 1)
1695: options->no_host_authentication_for_localhost = 0;
1.128 markus 1696: if (options->identities_only == -1)
1697: options->identities_only = 0;
1.101 markus 1698: if (options->enable_ssh_keysign == -1)
1699: options->enable_ssh_keysign = 0;
1.105 markus 1700: if (options->rekey_limit == -1)
1701: options->rekey_limit = 0;
1.198 dtucker 1702: if (options->rekey_interval == -1)
1703: options->rekey_interval = 0;
1.107 jakob 1704: if (options->verify_host_key_dns == -1)
1705: options->verify_host_key_dns = 0;
1.127 markus 1706: if (options->server_alive_interval == -1)
1707: options->server_alive_interval = 0;
1708: if (options->server_alive_count_max == -1)
1709: options->server_alive_count_max = 3;
1.132 djm 1710: if (options->control_master == -1)
1711: options->control_master = 0;
1.187 djm 1712: if (options->control_persist == -1) {
1713: options->control_persist = 0;
1714: options->control_persist_timeout = 0;
1715: }
1.136 djm 1716: if (options->hash_known_hosts == -1)
1717: options->hash_known_hosts = 0;
1.144 reyk 1718: if (options->tun_open == -1)
1.145 reyk 1719: options->tun_open = SSH_TUNMODE_NO;
1720: if (options->tun_local == -1)
1721: options->tun_local = SSH_TUNID_ANY;
1722: if (options->tun_remote == -1)
1723: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1724: if (options->permit_local_command == -1)
1725: options->permit_local_command = 0;
1.177 andreas 1726: if (options->use_roaming == -1)
1727: options->use_roaming = 1;
1.167 grunk 1728: if (options->visual_host_key == -1)
1729: options->visual_host_key = 0;
1.190 djm 1730: if (options->ip_qos_interactive == -1)
1731: options->ip_qos_interactive = IPTOS_LOWDELAY;
1732: if (options->ip_qos_bulk == -1)
1733: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1734: if (options->request_tty == -1)
1735: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 1736: if (options->proxy_use_fdpass == -1)
1737: options->proxy_use_fdpass = 0;
1.209 djm 1738: if (options->canonicalize_max_dots == -1)
1739: options->canonicalize_max_dots = 1;
1740: if (options->canonicalize_fallback_local == -1)
1741: options->canonicalize_fallback_local = 1;
1742: if (options->canonicalize_hostname == -1)
1743: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.207 djm 1744: #define CLEAR_ON_NONE(v) \
1745: do { \
1.218 djm 1746: if (option_clear_or_none(v)) { \
1.207 djm 1747: free(v); \
1748: v = NULL; \
1749: } \
1750: } while(0)
1751: CLEAR_ON_NONE(options->local_command);
1752: CLEAR_ON_NONE(options->proxy_command);
1753: CLEAR_ON_NONE(options->control_path);
1.17 markus 1754: /* options->user will be set in the main program if appropriate */
1755: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1756: /* options->host_key_alias should not be set by default */
1.67 markus 1757: /* options->preferred_authentications will be set in ssh */
1.135 djm 1758: }
1759:
1760: /*
1761: * parse_forward
1762: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 1763: * dynamicfwd == 0
1.135 djm 1764: * [listenhost:]listenport:connecthost:connectport
1.168 stevesk 1765: * dynamicfwd == 1
1766: * [listenhost:]listenport
1.135 djm 1767: * returns number of arguments parsed or zero on error
1768: */
1769: int
1.176 djm 1770: parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 1771: {
1772: int i;
1773: char *p, *cp, *fwdarg[4];
1774:
1775: memset(fwd, '\0', sizeof(*fwd));
1776:
1777: cp = p = xstrdup(fwdspec);
1778:
1779: /* skip leading spaces */
1.214 deraadt 1780: while (isspace((u_char)*cp))
1.135 djm 1781: cp++;
1782:
1783: for (i = 0; i < 4; ++i)
1784: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1785: break;
1786:
1.170 stevesk 1787: /* Check for trailing garbage */
1.135 djm 1788: if (cp != NULL)
1789: i = 0; /* failure */
1790:
1791: switch (i) {
1.168 stevesk 1792: case 1:
1793: fwd->listen_host = NULL;
1794: fwd->listen_port = a2port(fwdarg[0]);
1795: fwd->connect_host = xstrdup("socks");
1796: break;
1797:
1798: case 2:
1799: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1800: fwd->listen_port = a2port(fwdarg[1]);
1801: fwd->connect_host = xstrdup("socks");
1802: break;
1803:
1.135 djm 1804: case 3:
1805: fwd->listen_host = NULL;
1806: fwd->listen_port = a2port(fwdarg[0]);
1807: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1808: fwd->connect_port = a2port(fwdarg[2]);
1809: break;
1810:
1811: case 4:
1812: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1813: fwd->listen_port = a2port(fwdarg[1]);
1814: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1815: fwd->connect_port = a2port(fwdarg[3]);
1816: break;
1817: default:
1818: i = 0; /* failure */
1819: }
1820:
1.202 djm 1821: free(p);
1.135 djm 1822:
1.168 stevesk 1823: if (dynamicfwd) {
1824: if (!(i == 1 || i == 2))
1825: goto fail_free;
1826: } else {
1827: if (!(i == 3 || i == 4))
1828: goto fail_free;
1.175 djm 1829: if (fwd->connect_port <= 0)
1.168 stevesk 1830: goto fail_free;
1831: }
1832:
1.176 djm 1833: if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0))
1.135 djm 1834: goto fail_free;
1835:
1836: if (fwd->connect_host != NULL &&
1837: strlen(fwd->connect_host) >= NI_MAXHOST)
1838: goto fail_free;
1.176 djm 1839: if (fwd->listen_host != NULL &&
1840: strlen(fwd->listen_host) >= NI_MAXHOST)
1841: goto fail_free;
1842:
1.135 djm 1843:
1844: return (i);
1845:
1846: fail_free:
1.202 djm 1847: free(fwd->connect_host);
1848: fwd->connect_host = NULL;
1849: free(fwd->listen_host);
1850: fwd->listen_host = NULL;
1.135 djm 1851: return (0);
1.1 deraadt 1852: }
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