Annotation of src/usr.bin/ssh/readconf.c, Revision 1.216
1.216 ! djm 1: /* $OpenBSD: readconf.c,v 1.215 2013/12/06 13:39:49 markus Exp $ */
1.1 deraadt 2: /*
1.18 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Functions for reading the configuration files.
1.26 markus 7: *
1.46 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 13: */
1.1 deraadt 14:
1.147 stevesk 15: #include <sys/types.h>
16: #include <sys/stat.h>
1.152 stevesk 17: #include <sys/socket.h>
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;
339:
340: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
341: fatal("Too many identity files specified (max %d)",
342: SSH_MAX_IDENTITY_FILES);
343:
344: if (dir == NULL) /* no dir, filename is absolute */
345: path = xstrdup(filename);
346: else
347: (void)xasprintf(&path, "%.100s%.100s", dir, filename);
348:
349: options->identity_file_userprovided[options->num_identity_files] =
350: userprovided;
351: options->identity_files[options->num_identity_files++] = path;
352: }
353:
1.206 djm 354: int
355: default_ssh_port(void)
356: {
357: static int port;
358: struct servent *sp;
359:
360: if (port == 0) {
361: sp = getservbyname(SSH_SERVICE_NAME, "tcp");
362: port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
363: }
364: return port;
365: }
366:
367: /*
368: * Execute a command in a shell.
369: * Return its exit status or -1 on abnormal exit.
370: */
371: static int
372: execute_in_shell(const char *cmd)
373: {
374: char *shell, *command_string;
375: pid_t pid;
376: int devnull, status;
377: extern uid_t original_real_uid;
378:
379: if ((shell = getenv("SHELL")) == NULL)
380: shell = _PATH_BSHELL;
381:
382: /*
383: * Use "exec" to avoid "sh -c" processes on some platforms
384: * (e.g. Solaris)
385: */
386: xasprintf(&command_string, "exec %s", cmd);
387:
388: /* Need this to redirect subprocess stdin/out */
389: if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
390: fatal("open(/dev/null): %s", strerror(errno));
391:
392: debug("Executing command: '%.500s'", cmd);
393:
394: /* Fork and execute the command. */
395: if ((pid = fork()) == 0) {
396: char *argv[4];
397:
398: /* Child. Permanently give up superuser privileges. */
399: permanently_drop_suid(original_real_uid);
400:
401: /* Redirect child stdin and stdout. Leave stderr */
402: if (dup2(devnull, STDIN_FILENO) == -1)
403: fatal("dup2: %s", strerror(errno));
404: if (dup2(devnull, STDOUT_FILENO) == -1)
405: fatal("dup2: %s", strerror(errno));
406: if (devnull > STDERR_FILENO)
407: close(devnull);
408: closefrom(STDERR_FILENO + 1);
409:
410: argv[0] = shell;
411: argv[1] = "-c";
412: argv[2] = command_string;
413: argv[3] = NULL;
414:
415: execv(argv[0], argv);
416: error("Unable to execute '%.100s': %s", cmd, strerror(errno));
417: /* Die with signal to make this error apparent to parent. */
418: signal(SIGTERM, SIG_DFL);
419: kill(getpid(), SIGTERM);
420: _exit(1);
421: }
422: /* Parent. */
423: if (pid < 0)
424: fatal("%s: fork: %.100s", __func__, strerror(errno));
425:
426: close(devnull);
427: free(command_string);
428:
429: while (waitpid(pid, &status, 0) == -1) {
430: if (errno != EINTR && errno != EAGAIN)
431: fatal("%s: waitpid: %s", __func__, strerror(errno));
432: }
433: if (!WIFEXITED(status)) {
434: error("command '%.100s' exited abnormally", cmd);
435: return -1;
436: }
437: debug3("command returned status %d", WEXITSTATUS(status));
438: return WEXITSTATUS(status);
439: }
440:
441: /*
442: * Parse and execute a Match directive.
443: */
444: static int
445: match_cfg_line(Options *options, char **condition, struct passwd *pw,
446: const char *host_arg, const char *filename, int linenum)
447: {
1.211 djm 448: char *arg, *attrib, *cmd, *cp = *condition, *host;
449: const char *ruser;
1.213 dtucker 450: int r, port, result = 1, attributes = 0;
1.206 djm 451: size_t len;
452: char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
453:
454: /*
455: * Configuration is likely to be incomplete at this point so we
456: * must be prepared to use default values.
457: */
458: port = options->port <= 0 ? default_ssh_port() : options->port;
459: ruser = options->user == NULL ? pw->pw_name : options->user;
1.211 djm 460: if (options->hostname != NULL) {
1.212 djm 461: /* NB. Please keep in sync with ssh.c:main() */
1.211 djm 462: host = percent_expand(options->hostname,
463: "h", host_arg, (char *)NULL);
464: } else
465: host = xstrdup(host_arg);
1.206 djm 466:
467: debug3("checking match for '%s' host %s", cp, host);
468: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.213 dtucker 469: attributes++;
470: if (strcasecmp(attrib, "all") == 0) {
471: if (attributes != 1 ||
472: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
473: error("'all' cannot be combined with other "
474: "Match attributes");
475: result = -1;
476: goto out;
477: }
478: *condition = cp;
479: result = 1;
480: goto out;
481: }
1.206 djm 482: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
483: error("Missing Match criteria for %s", attrib);
1.211 djm 484: result = -1;
485: goto out;
1.206 djm 486: }
487: len = strlen(arg);
488: if (strcasecmp(attrib, "host") == 0) {
489: if (match_hostname(host, arg, len) != 1)
490: result = 0;
491: else
492: debug("%.200s line %d: matched 'Host %.100s' ",
493: filename, linenum, host);
494: } else if (strcasecmp(attrib, "originalhost") == 0) {
495: if (match_hostname(host_arg, arg, len) != 1)
496: result = 0;
497: else
498: debug("%.200s line %d: matched "
499: "'OriginalHost %.100s' ",
500: filename, linenum, host_arg);
501: } else if (strcasecmp(attrib, "user") == 0) {
502: if (match_pattern_list(ruser, arg, len, 0) != 1)
503: result = 0;
504: else
505: debug("%.200s line %d: matched 'User %.100s' ",
506: filename, linenum, ruser);
507: } else if (strcasecmp(attrib, "localuser") == 0) {
508: if (match_pattern_list(pw->pw_name, arg, len, 0) != 1)
509: result = 0;
510: else
511: debug("%.200s line %d: matched "
512: "'LocalUser %.100s' ",
513: filename, linenum, pw->pw_name);
1.210 djm 514: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 515: if (gethostname(thishost, sizeof(thishost)) == -1)
516: fatal("gethostname: %s", strerror(errno));
517: strlcpy(shorthost, thishost, sizeof(shorthost));
518: shorthost[strcspn(thishost, ".")] = '\0';
519: snprintf(portstr, sizeof(portstr), "%d", port);
520:
521: cmd = percent_expand(arg,
522: "L", shorthost,
523: "d", pw->pw_dir,
524: "h", host,
525: "l", thishost,
526: "n", host_arg,
527: "p", portstr,
528: "r", ruser,
529: "u", pw->pw_name,
530: (char *)NULL);
531: r = execute_in_shell(cmd);
532: if (r == -1) {
1.210 djm 533: fatal("%.200s line %d: match exec '%.100s' "
1.206 djm 534: "error", filename, linenum, cmd);
535: } else if (r == 0) {
536: debug("%.200s line %d: matched "
1.210 djm 537: "'exec \"%.100s\"' ",
1.206 djm 538: filename, linenum, cmd);
539: } else
540: result = 0;
541: free(cmd);
542: } else {
543: error("Unsupported Match attribute %s", attrib);
1.211 djm 544: result = -1;
545: goto out;
1.206 djm 546: }
1.213 dtucker 547: }
548: if (attributes == 0) {
549: error("One or more attributes required for Match");
550: result = -1;
551: goto out;
1.206 djm 552: }
553: debug3("match %sfound", result ? "" : "not ");
554: *condition = cp;
1.211 djm 555: out:
556: free(host);
1.206 djm 557: return result;
558: }
559:
1.208 djm 560: /* Check and prepare a domain name: removes trailing '.' and lowercases */
561: static void
562: valid_domain(char *name, const char *filename, int linenum)
563: {
564: size_t i, l = strlen(name);
565: u_char c, last = '\0';
566:
567: if (l == 0)
568: fatal("%s line %d: empty hostname suffix", filename, linenum);
569: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
570: fatal("%s line %d: hostname suffix \"%.100s\" "
571: "starts with invalid character", filename, linenum, name);
572: for (i = 0; i < l; i++) {
573: c = tolower((u_char)name[i]);
574: name[i] = (char)c;
575: if (last == '.' && c == '.')
576: fatal("%s line %d: hostname suffix \"%.100s\" contains "
577: "consecutive separators", filename, linenum, name);
578: if (c != '.' && c != '-' && !isalnum(c) &&
579: c != '_') /* technically invalid, but common */
580: fatal("%s line %d: hostname suffix \"%.100s\" contains "
581: "invalid characters", filename, linenum, name);
582: last = c;
583: }
584: if (name[l - 1] == '.')
585: name[l - 1] = '\0';
586: }
587:
1.19 markus 588: /*
1.70 stevesk 589: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 590: */
1.26 markus 591: static OpCodes
1.199 djm 592: parse_token(const char *cp, const char *filename, int linenum,
593: const char *ignored_unknown)
1.1 deraadt 594: {
1.199 djm 595: int i;
1.1 deraadt 596:
1.17 markus 597: for (i = 0; keywords[i].name; i++)
1.199 djm 598: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 599: return keywords[i].opcode;
1.199 djm 600: if (ignored_unknown != NULL && match_pattern_list(cp, ignored_unknown,
601: strlen(ignored_unknown), 1) == 1)
602: return oIgnoredUnknownOption;
1.75 stevesk 603: error("%s: line %d: Bad configuration option: %s",
604: filename, linenum, cp);
1.17 markus 605: return oBadOption;
1.1 deraadt 606: }
607:
1.207 djm 608: /* Multistate option parsing */
609: struct multistate {
610: char *key;
611: int value;
612: };
613: static const struct multistate multistate_flag[] = {
614: { "true", 1 },
615: { "false", 0 },
616: { "yes", 1 },
617: { "no", 0 },
618: { NULL, -1 }
619: };
620: static const struct multistate multistate_yesnoask[] = {
621: { "true", 1 },
622: { "false", 0 },
623: { "yes", 1 },
624: { "no", 0 },
625: { "ask", 2 },
626: { NULL, -1 }
627: };
628: static const struct multistate multistate_addressfamily[] = {
629: { "inet", AF_INET },
630: { "inet6", AF_INET6 },
631: { "any", AF_UNSPEC },
632: { NULL, -1 }
633: };
634: static const struct multistate multistate_controlmaster[] = {
635: { "true", SSHCTL_MASTER_YES },
636: { "yes", SSHCTL_MASTER_YES },
637: { "false", SSHCTL_MASTER_NO },
638: { "no", SSHCTL_MASTER_NO },
639: { "auto", SSHCTL_MASTER_AUTO },
640: { "ask", SSHCTL_MASTER_ASK },
641: { "autoask", SSHCTL_MASTER_AUTO_ASK },
642: { NULL, -1 }
643: };
644: static const struct multistate multistate_tunnel[] = {
645: { "ethernet", SSH_TUNMODE_ETHERNET },
646: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
647: { "true", SSH_TUNMODE_DEFAULT },
648: { "yes", SSH_TUNMODE_DEFAULT },
649: { "false", SSH_TUNMODE_NO },
650: { "no", SSH_TUNMODE_NO },
651: { NULL, -1 }
652: };
653: static const struct multistate multistate_requesttty[] = {
654: { "true", REQUEST_TTY_YES },
655: { "yes", REQUEST_TTY_YES },
656: { "false", REQUEST_TTY_NO },
657: { "no", REQUEST_TTY_NO },
658: { "force", REQUEST_TTY_FORCE },
659: { "auto", REQUEST_TTY_AUTO },
660: { NULL, -1 }
661: };
1.209 djm 662: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 663: { "true", SSH_CANONICALISE_YES },
664: { "false", SSH_CANONICALISE_NO },
665: { "yes", SSH_CANONICALISE_YES },
666: { "no", SSH_CANONICALISE_NO },
667: { "always", SSH_CANONICALISE_ALWAYS },
668: { NULL, -1 }
669: };
1.207 djm 670:
1.19 markus 671: /*
672: * Processes a single option line as used in the configuration files. This
673: * only sets those values that have not already been set.
674: */
1.102 markus 675: #define WHITESPACE " \t\r\n"
1.14 markus 676: int
1.206 djm 677: process_config_line(Options *options, struct passwd *pw, const char *host,
678: char *line, const char *filename, int linenum, int *activep, int userconfig)
1.1 deraadt 679: {
1.193 djm 680: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
681: char **cpptr, fwdarg[256];
1.199 djm 682: u_int i, *uintptr, max_entries = 0;
1.206 djm 683: int negated, opcode, *intptr, value, value2, cmdline = 0;
1.164 dtucker 684: LogLevel *log_level_ptr;
1.201 dtucker 685: long long val64;
1.102 markus 686: size_t len;
1.135 djm 687: Forward fwd;
1.207 djm 688: const struct multistate *multistate_ptr;
1.208 djm 689: struct allowed_cname *cname;
1.106 djm 690:
1.206 djm 691: if (activep == NULL) { /* We are processing a command line directive */
692: cmdline = 1;
693: activep = &cmdline;
694: }
695:
1.106 djm 696: /* Strip trailing whitespace */
1.139 deraadt 697: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 698: if (strchr(WHITESPACE, line[len]) == NULL)
699: break;
700: line[len] = '\0';
701: }
1.1 deraadt 702:
1.42 provos 703: s = line;
704: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 705: if ((keyword = strdelim(&s)) == NULL)
706: return 0;
1.42 provos 707: /* Ignore leading whitespace. */
708: if (*keyword == '\0')
1.43 markus 709: keyword = strdelim(&s);
1.56 deraadt 710: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 711: return 0;
1.199 djm 712: /* Match lowercase keyword */
1.207 djm 713: lowercase(keyword);
1.17 markus 714:
1.199 djm 715: opcode = parse_token(keyword, filename, linenum,
716: options->ignored_unknown);
1.17 markus 717:
718: switch (opcode) {
719: case oBadOption:
1.19 markus 720: /* don't panic, but count bad options */
721: return -1;
1.17 markus 722: /* NOTREACHED */
1.199 djm 723: case oIgnoredUnknownOption:
724: debug("%s line %d: Ignored unknown option \"%s\"",
725: filename, linenum, keyword);
726: return 0;
1.111 djm 727: case oConnectTimeout:
728: intptr = &options->connection_timeout;
1.127 markus 729: parse_time:
1.111 djm 730: arg = strdelim(&s);
731: if (!arg || *arg == '\0')
732: fatal("%s line %d: missing time value.",
733: filename, linenum);
734: if ((value = convtime(arg)) == -1)
735: fatal("%s line %d: invalid time value.",
736: filename, linenum);
1.160 dtucker 737: if (*activep && *intptr == -1)
1.111 djm 738: *intptr = value;
739: break;
740:
1.17 markus 741: case oForwardAgent:
742: intptr = &options->forward_agent;
1.207 djm 743: parse_flag:
744: multistate_ptr = multistate_flag;
745: parse_multistate:
1.42 provos 746: arg = strdelim(&s);
1.40 ho 747: if (!arg || *arg == '\0')
1.207 djm 748: fatal("%s line %d: missing argument.",
749: filename, linenum);
750: value = -1;
751: for (i = 0; multistate_ptr[i].key != NULL; i++) {
752: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
753: value = multistate_ptr[i].value;
754: break;
755: }
756: }
757: if (value == -1)
758: fatal("%s line %d: unsupported option \"%s\".",
759: filename, linenum, arg);
1.17 markus 760: if (*activep && *intptr == -1)
761: *intptr = value;
762: break;
763:
764: case oForwardX11:
765: intptr = &options->forward_x11;
766: goto parse_flag;
767:
1.123 markus 768: case oForwardX11Trusted:
769: intptr = &options->forward_x11_trusted;
770: goto parse_flag;
1.186 djm 771:
772: case oForwardX11Timeout:
773: intptr = &options->forward_x11_timeout;
774: goto parse_time;
1.123 markus 775:
1.17 markus 776: case oGatewayPorts:
777: intptr = &options->gateway_ports;
778: goto parse_flag;
779:
1.153 markus 780: case oExitOnForwardFailure:
781: intptr = &options->exit_on_forward_failure;
782: goto parse_flag;
783:
1.17 markus 784: case oUsePrivilegedPort:
785: intptr = &options->use_privileged_port;
786: goto parse_flag;
787:
788: case oPasswordAuthentication:
789: intptr = &options->password_authentication;
790: goto parse_flag;
791:
1.48 markus 792: case oKbdInteractiveAuthentication:
793: intptr = &options->kbd_interactive_authentication;
794: goto parse_flag;
795:
796: case oKbdInteractiveDevices:
797: charptr = &options->kbd_interactive_devices;
798: goto parse_string;
799:
1.50 markus 800: case oPubkeyAuthentication:
801: intptr = &options->pubkey_authentication;
1.30 markus 802: goto parse_flag;
803:
1.17 markus 804: case oRSAAuthentication:
805: intptr = &options->rsa_authentication;
806: goto parse_flag;
807:
808: case oRhostsRSAAuthentication:
809: intptr = &options->rhosts_rsa_authentication;
810: goto parse_flag;
811:
1.72 markus 812: case oHostbasedAuthentication:
813: intptr = &options->hostbased_authentication;
814: goto parse_flag;
815:
1.59 markus 816: case oChallengeResponseAuthentication:
1.78 markus 817: intptr = &options->challenge_response_authentication;
1.17 markus 818: goto parse_flag;
1.108 jakob 819:
1.118 markus 820: case oGssAuthentication:
821: intptr = &options->gss_authentication;
822: goto parse_flag;
823:
824: case oGssDelegateCreds:
825: intptr = &options->gss_deleg_creds;
826: goto parse_flag;
827:
1.17 markus 828: case oBatchMode:
829: intptr = &options->batch_mode;
830: goto parse_flag;
831:
832: case oCheckHostIP:
833: intptr = &options->check_host_ip;
1.167 grunk 834: goto parse_flag;
1.17 markus 835:
1.107 jakob 836: case oVerifyHostKeyDNS:
837: intptr = &options->verify_host_key_dns;
1.207 djm 838: multistate_ptr = multistate_yesnoask;
839: goto parse_multistate;
1.107 jakob 840:
1.17 markus 841: case oStrictHostKeyChecking:
842: intptr = &options->strict_host_key_checking;
1.207 djm 843: multistate_ptr = multistate_yesnoask;
844: goto parse_multistate;
1.17 markus 845:
846: case oCompression:
847: intptr = &options->compression;
848: goto parse_flag;
849:
1.126 markus 850: case oTCPKeepAlive:
851: intptr = &options->tcp_keep_alive;
1.17 markus 852: goto parse_flag;
853:
1.91 markus 854: case oNoHostAuthenticationForLocalhost:
855: intptr = &options->no_host_authentication_for_localhost;
856: goto parse_flag;
857:
1.17 markus 858: case oNumberOfPasswordPrompts:
859: intptr = &options->number_of_password_prompts;
860: goto parse_int;
861:
862: case oCompressionLevel:
863: intptr = &options->compression_level;
864: goto parse_int;
865:
1.105 markus 866: case oRekeyLimit:
867: arg = strdelim(&s);
868: if (!arg || *arg == '\0')
1.198 dtucker 869: fatal("%.200s line %d: Missing argument.", filename,
870: linenum);
871: if (strcmp(arg, "default") == 0) {
872: val64 = 0;
873: } else {
1.200 dtucker 874: if (scan_scaled(arg, &val64) == -1)
875: fatal("%.200s line %d: Bad number '%s': %s",
876: filename, linenum, arg, strerror(errno));
877: /* check for too-large or too-small limits */
878: if (val64 > UINT_MAX)
1.198 dtucker 879: fatal("%.200s line %d: RekeyLimit too large",
880: filename, linenum);
881: if (val64 != 0 && val64 < 16)
882: fatal("%.200s line %d: RekeyLimit too small",
883: filename, linenum);
1.105 markus 884: }
1.165 djm 885: if (*activep && options->rekey_limit == -1)
886: options->rekey_limit = (u_int32_t)val64;
1.198 dtucker 887: if (s != NULL) { /* optional rekey interval present */
888: if (strcmp(s, "none") == 0) {
889: (void)strdelim(&s); /* discard */
890: break;
891: }
892: intptr = &options->rekey_interval;
893: goto parse_time;
894: }
1.105 markus 895: break;
896:
1.17 markus 897: case oIdentityFile:
1.42 provos 898: arg = strdelim(&s);
1.40 ho 899: if (!arg || *arg == '\0')
1.17 markus 900: fatal("%.200s line %d: Missing argument.", filename, linenum);
901: if (*activep) {
1.50 markus 902: intptr = &options->num_identity_files;
1.27 markus 903: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 904: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 905: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.196 dtucker 906: add_identity_file(options, NULL, arg, userconfig);
1.17 markus 907: }
908: break;
909:
1.34 markus 910: case oXAuthLocation:
911: charptr=&options->xauth_location;
912: goto parse_string;
913:
1.17 markus 914: case oUser:
915: charptr = &options->user;
916: parse_string:
1.42 provos 917: arg = strdelim(&s);
1.40 ho 918: if (!arg || *arg == '\0')
1.193 djm 919: fatal("%.200s line %d: Missing argument.",
920: filename, linenum);
1.17 markus 921: if (*activep && *charptr == NULL)
1.38 provos 922: *charptr = xstrdup(arg);
1.17 markus 923: break;
924:
925: case oGlobalKnownHostsFile:
1.193 djm 926: cpptr = (char **)&options->system_hostfiles;
927: uintptr = &options->num_system_hostfiles;
928: max_entries = SSH_MAX_HOSTS_FILES;
929: parse_char_array:
930: if (*activep && *uintptr == 0) {
931: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
932: if ((*uintptr) >= max_entries)
933: fatal("%s line %d: "
934: "too many authorized keys files.",
935: filename, linenum);
936: cpptr[(*uintptr)++] = xstrdup(arg);
937: }
938: }
939: return 0;
1.17 markus 940:
941: case oUserKnownHostsFile:
1.193 djm 942: cpptr = (char **)&options->user_hostfiles;
943: uintptr = &options->num_user_hostfiles;
944: max_entries = SSH_MAX_HOSTS_FILES;
945: goto parse_char_array;
1.27 markus 946:
1.17 markus 947: case oHostName:
948: charptr = &options->hostname;
949: goto parse_string;
950:
1.52 markus 951: case oHostKeyAlias:
952: charptr = &options->host_key_alias;
953: goto parse_string;
954:
1.67 markus 955: case oPreferredAuthentications:
956: charptr = &options->preferred_authentications;
957: goto parse_string;
958:
1.77 markus 959: case oBindAddress:
960: charptr = &options->bind_address;
961: goto parse_string;
962:
1.183 markus 963: case oPKCS11Provider:
964: charptr = &options->pkcs11_provider;
1.86 markus 965: goto parse_string;
1.85 jakob 966:
1.17 markus 967: case oProxyCommand:
1.144 reyk 968: charptr = &options->proxy_command;
969: parse_command:
1.113 markus 970: if (s == NULL)
971: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 972: len = strspn(s, WHITESPACE "=");
1.17 markus 973: if (*activep && *charptr == NULL)
1.102 markus 974: *charptr = xstrdup(s + len);
1.17 markus 975: return 0;
976:
977: case oPort:
978: intptr = &options->port;
979: parse_int:
1.42 provos 980: arg = strdelim(&s);
1.40 ho 981: if (!arg || *arg == '\0')
1.17 markus 982: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 983: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 984: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 985:
986: /* Octal, decimal, or hex format? */
1.38 provos 987: value = strtol(arg, &endofnumber, 0);
988: if (arg == endofnumber)
1.21 markus 989: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 990: if (*activep && *intptr == -1)
991: *intptr = value;
992: break;
993:
994: case oConnectionAttempts:
995: intptr = &options->connection_attempts;
996: goto parse_int;
997:
998: case oCipher:
999: intptr = &options->cipher;
1.42 provos 1000: arg = strdelim(&s);
1.40 ho 1001: if (!arg || *arg == '\0')
1.32 markus 1002: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1003: value = cipher_number(arg);
1.17 markus 1004: if (value == -1)
1005: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 1006: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 1007: if (*activep && *intptr == -1)
1008: *intptr = value;
1009: break;
1010:
1.25 markus 1011: case oCiphers:
1.42 provos 1012: arg = strdelim(&s);
1.40 ho 1013: if (!arg || *arg == '\0')
1.32 markus 1014: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1015: if (!ciphers_valid(arg))
1.31 markus 1016: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1017: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1018: if (*activep && options->ciphers == NULL)
1.38 provos 1019: options->ciphers = xstrdup(arg);
1.25 markus 1020: break;
1021:
1.62 markus 1022: case oMacs:
1023: arg = strdelim(&s);
1024: if (!arg || *arg == '\0')
1025: fatal("%.200s line %d: Missing argument.", filename, linenum);
1026: if (!mac_valid(arg))
1027: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1028: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1029: if (*activep && options->macs == NULL)
1030: options->macs = xstrdup(arg);
1031: break;
1032:
1.189 djm 1033: case oKexAlgorithms:
1034: arg = strdelim(&s);
1035: if (!arg || *arg == '\0')
1036: fatal("%.200s line %d: Missing argument.",
1037: filename, linenum);
1038: if (!kex_names_valid(arg))
1039: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1040: filename, linenum, arg ? arg : "<NONE>");
1041: if (*activep && options->kex_algorithms == NULL)
1042: options->kex_algorithms = xstrdup(arg);
1043: break;
1044:
1.76 markus 1045: case oHostKeyAlgorithms:
1046: arg = strdelim(&s);
1047: if (!arg || *arg == '\0')
1048: fatal("%.200s line %d: Missing argument.", filename, linenum);
1049: if (!key_names_valid2(arg))
1050: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 1051: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 1052: if (*activep && options->hostkeyalgorithms == NULL)
1053: options->hostkeyalgorithms = xstrdup(arg);
1054: break;
1055:
1.25 markus 1056: case oProtocol:
1057: intptr = &options->protocol;
1.42 provos 1058: arg = strdelim(&s);
1.40 ho 1059: if (!arg || *arg == '\0')
1.32 markus 1060: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1061: value = proto_spec(arg);
1.25 markus 1062: if (value == SSH_PROTO_UNKNOWN)
1063: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 1064: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1065: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
1066: *intptr = value;
1067: break;
1068:
1.17 markus 1069: case oLogLevel:
1.164 dtucker 1070: log_level_ptr = &options->log_level;
1.42 provos 1071: arg = strdelim(&s);
1.38 provos 1072: value = log_level_number(arg);
1.95 markus 1073: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1074: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1075: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1076: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1077: *log_level_ptr = (LogLevel) value;
1.17 markus 1078: break;
1079:
1.88 stevesk 1080: case oLocalForward:
1.17 markus 1081: case oRemoteForward:
1.168 stevesk 1082: case oDynamicForward:
1.42 provos 1083: arg = strdelim(&s);
1.135 djm 1084: if (arg == NULL || *arg == '\0')
1.88 stevesk 1085: fatal("%.200s line %d: Missing port argument.",
1086: filename, linenum);
1.135 djm 1087:
1.168 stevesk 1088: if (opcode == oLocalForward ||
1089: opcode == oRemoteForward) {
1090: arg2 = strdelim(&s);
1091: if (arg2 == NULL || *arg2 == '\0')
1092: fatal("%.200s line %d: Missing target argument.",
1093: filename, linenum);
1.135 djm 1094:
1.168 stevesk 1095: /* construct a string for parse_forward */
1096: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1097: } else if (opcode == oDynamicForward) {
1098: strlcpy(fwdarg, arg, sizeof(fwdarg));
1099: }
1100:
1101: if (parse_forward(&fwd, fwdarg,
1.176 djm 1102: opcode == oDynamicForward ? 1 : 0,
1103: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1104: fatal("%.200s line %d: Bad forwarding specification.",
1105: filename, linenum);
1.135 djm 1106:
1.88 stevesk 1107: if (*activep) {
1.168 stevesk 1108: if (opcode == oLocalForward ||
1109: opcode == oDynamicForward)
1.135 djm 1110: add_local_forward(options, &fwd);
1.88 stevesk 1111: else if (opcode == oRemoteForward)
1.135 djm 1112: add_remote_forward(options, &fwd);
1.88 stevesk 1113: }
1.17 markus 1114: break;
1.71 markus 1115:
1.90 stevesk 1116: case oClearAllForwardings:
1117: intptr = &options->clear_forwardings;
1118: goto parse_flag;
1119:
1.17 markus 1120: case oHost:
1.206 djm 1121: if (cmdline)
1122: fatal("Host directive not supported as a command-line "
1123: "option");
1.17 markus 1124: *activep = 0;
1.191 djm 1125: arg2 = NULL;
1126: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1127: negated = *arg == '!';
1128: if (negated)
1129: arg++;
1.38 provos 1130: if (match_pattern(host, arg)) {
1.191 djm 1131: if (negated) {
1132: debug("%.200s line %d: Skipping Host "
1133: "block because of negated match "
1134: "for %.100s", filename, linenum,
1135: arg);
1136: *activep = 0;
1137: break;
1138: }
1139: if (!*activep)
1140: arg2 = arg; /* logged below */
1.17 markus 1141: *activep = 1;
1142: }
1.191 djm 1143: }
1144: if (*activep)
1145: debug("%.200s line %d: Applying options for %.100s",
1146: filename, linenum, arg2);
1.42 provos 1147: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1148: return 0;
1149:
1.206 djm 1150: case oMatch:
1151: if (cmdline)
1152: fatal("Host directive not supported as a command-line "
1153: "option");
1154: value = match_cfg_line(options, &s, pw, host,
1155: filename, linenum);
1156: if (value < 0)
1157: fatal("%.200s line %d: Bad Match condition", filename,
1158: linenum);
1159: *activep = value;
1160: break;
1161:
1.17 markus 1162: case oEscapeChar:
1163: intptr = &options->escape_char;
1.42 provos 1164: arg = strdelim(&s);
1.40 ho 1165: if (!arg || *arg == '\0')
1.17 markus 1166: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1167: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1168: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1169: value = (u_char) arg[1] & 31;
1.38 provos 1170: else if (strlen(arg) == 1)
1.51 markus 1171: value = (u_char) arg[0];
1.38 provos 1172: else if (strcmp(arg, "none") == 0)
1.79 stevesk 1173: value = SSH_ESCAPECHAR_NONE;
1.17 markus 1174: else {
1175: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1176: filename, linenum);
1.17 markus 1177: /* NOTREACHED */
1178: value = 0; /* Avoid compiler warning. */
1179: }
1180: if (*activep && *intptr == -1)
1181: *intptr = value;
1.112 djm 1182: break;
1183:
1184: case oAddressFamily:
1.114 djm 1185: intptr = &options->address_family;
1.207 djm 1186: multistate_ptr = multistate_addressfamily;
1187: goto parse_multistate;
1.17 markus 1188:
1.101 markus 1189: case oEnableSSHKeysign:
1190: intptr = &options->enable_ssh_keysign;
1191: goto parse_flag;
1192:
1.128 markus 1193: case oIdentitiesOnly:
1194: intptr = &options->identities_only;
1195: goto parse_flag;
1196:
1.127 markus 1197: case oServerAliveInterval:
1198: intptr = &options->server_alive_interval;
1199: goto parse_time;
1200:
1201: case oServerAliveCountMax:
1202: intptr = &options->server_alive_count_max;
1203: goto parse_int;
1204:
1.130 djm 1205: case oSendEnv:
1206: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1207: if (strchr(arg, '=') != NULL)
1208: fatal("%s line %d: Invalid environment name.",
1209: filename, linenum);
1.137 djm 1210: if (!*activep)
1211: continue;
1.130 djm 1212: if (options->num_send_env >= MAX_SEND_ENV)
1213: fatal("%s line %d: too many send env.",
1214: filename, linenum);
1215: options->send_env[options->num_send_env++] =
1216: xstrdup(arg);
1217: }
1218: break;
1219:
1.132 djm 1220: case oControlPath:
1221: charptr = &options->control_path;
1222: goto parse_string;
1223:
1224: case oControlMaster:
1225: intptr = &options->control_master;
1.207 djm 1226: multistate_ptr = multistate_controlmaster;
1227: goto parse_multistate;
1.132 djm 1228:
1.187 djm 1229: case oControlPersist:
1230: /* no/false/yes/true, or a time spec */
1231: intptr = &options->control_persist;
1232: arg = strdelim(&s);
1233: if (!arg || *arg == '\0')
1234: fatal("%.200s line %d: Missing ControlPersist"
1235: " argument.", filename, linenum);
1236: value = 0;
1237: value2 = 0; /* timeout */
1238: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1239: value = 0;
1240: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1241: value = 1;
1242: else if ((value2 = convtime(arg)) >= 0)
1243: value = 1;
1244: else
1245: fatal("%.200s line %d: Bad ControlPersist argument.",
1246: filename, linenum);
1247: if (*activep && *intptr == -1) {
1248: *intptr = value;
1249: options->control_persist_timeout = value2;
1250: }
1251: break;
1252:
1.136 djm 1253: case oHashKnownHosts:
1254: intptr = &options->hash_known_hosts;
1255: goto parse_flag;
1256:
1.144 reyk 1257: case oTunnel:
1258: intptr = &options->tun_open;
1.207 djm 1259: multistate_ptr = multistate_tunnel;
1260: goto parse_multistate;
1.144 reyk 1261:
1262: case oTunnelDevice:
1263: arg = strdelim(&s);
1264: if (!arg || *arg == '\0')
1265: fatal("%.200s line %d: Missing argument.", filename, linenum);
1266: value = a2tun(arg, &value2);
1.145 reyk 1267: if (value == SSH_TUNID_ERR)
1.144 reyk 1268: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1269: if (*activep) {
1270: options->tun_local = value;
1271: options->tun_remote = value2;
1272: }
1273: break;
1274:
1275: case oLocalCommand:
1276: charptr = &options->local_command;
1277: goto parse_command;
1278:
1279: case oPermitLocalCommand:
1280: intptr = &options->permit_local_command;
1281: goto parse_flag;
1282:
1.167 grunk 1283: case oVisualHostKey:
1284: intptr = &options->visual_host_key;
1285: goto parse_flag;
1286:
1.190 djm 1287: case oIPQoS:
1288: arg = strdelim(&s);
1289: if ((value = parse_ipqos(arg)) == -1)
1290: fatal("%s line %d: Bad IPQoS value: %s",
1291: filename, linenum, arg);
1292: arg = strdelim(&s);
1293: if (arg == NULL)
1294: value2 = value;
1295: else if ((value2 = parse_ipqos(arg)) == -1)
1296: fatal("%s line %d: Bad IPQoS value: %s",
1297: filename, linenum, arg);
1298: if (*activep) {
1299: options->ip_qos_interactive = value;
1300: options->ip_qos_bulk = value2;
1301: }
1302: break;
1303:
1.177 andreas 1304: case oUseRoaming:
1305: intptr = &options->use_roaming;
1306: goto parse_flag;
1307:
1.192 djm 1308: case oRequestTTY:
1309: intptr = &options->request_tty;
1.207 djm 1310: multistate_ptr = multistate_requesttty;
1311: goto parse_multistate;
1.192 djm 1312:
1.199 djm 1313: case oIgnoreUnknown:
1314: charptr = &options->ignored_unknown;
1315: goto parse_string;
1316:
1.205 djm 1317: case oProxyUseFdpass:
1318: intptr = &options->proxy_use_fdpass;
1319: goto parse_flag;
1320:
1.208 djm 1321: case oCanonicalDomains:
1322: value = options->num_canonical_domains != 0;
1323: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1324: valid_domain(arg, filename, linenum);
1325: if (!*activep || value)
1326: continue;
1327: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1328: fatal("%s line %d: too many hostname suffixes.",
1329: filename, linenum);
1330: options->canonical_domains[
1331: options->num_canonical_domains++] = xstrdup(arg);
1332: }
1333: break;
1334:
1.209 djm 1335: case oCanonicalizePermittedCNAMEs:
1.208 djm 1336: value = options->num_permitted_cnames != 0;
1337: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1338: /* Either '*' for everything or 'list:list' */
1339: if (strcmp(arg, "*") == 0)
1340: arg2 = arg;
1341: else {
1342: lowercase(arg);
1343: if ((arg2 = strchr(arg, ':')) == NULL ||
1344: arg2[1] == '\0') {
1345: fatal("%s line %d: "
1346: "Invalid permitted CNAME \"%s\"",
1347: filename, linenum, arg);
1348: }
1349: *arg2 = '\0';
1350: arg2++;
1351: }
1352: if (!*activep || value)
1353: continue;
1354: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1355: fatal("%s line %d: too many permitted CNAMEs.",
1356: filename, linenum);
1357: cname = options->permitted_cnames +
1358: options->num_permitted_cnames++;
1359: cname->source_list = xstrdup(arg);
1360: cname->target_list = xstrdup(arg2);
1361: }
1362: break;
1363:
1.209 djm 1364: case oCanonicalizeHostname:
1365: intptr = &options->canonicalize_hostname;
1366: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1367: goto parse_multistate;
1368:
1.209 djm 1369: case oCanonicalizeMaxDots:
1370: intptr = &options->canonicalize_max_dots;
1.208 djm 1371: goto parse_int;
1372:
1.209 djm 1373: case oCanonicalizeFallbackLocal:
1374: intptr = &options->canonicalize_fallback_local;
1.208 djm 1375: goto parse_flag;
1376:
1.96 markus 1377: case oDeprecated:
1.98 markus 1378: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1379: filename, linenum, keyword);
1.98 markus 1380: return 0;
1.96 markus 1381:
1.110 jakob 1382: case oUnsupported:
1383: error("%s line %d: Unsupported option \"%s\"",
1384: filename, linenum, keyword);
1385: return 0;
1386:
1.17 markus 1387: default:
1388: fatal("process_config_line: Unimplemented opcode %d", opcode);
1389: }
1390:
1391: /* Check that there is no garbage at end of line. */
1.57 djm 1392: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1393: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1394: filename, linenum, arg);
1.39 ho 1395: }
1.17 markus 1396: return 0;
1.1 deraadt 1397: }
1398:
1399:
1.19 markus 1400: /*
1401: * Reads the config file and modifies the options accordingly. Options
1402: * should already be initialized before this call. This never returns if
1.89 stevesk 1403: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1404: */
1.1 deraadt 1405:
1.89 stevesk 1406: int
1.206 djm 1407: read_config_file(const char *filename, struct passwd *pw, const char *host,
1408: Options *options, int flags)
1.1 deraadt 1409: {
1.17 markus 1410: FILE *f;
1411: char line[1024];
1412: int active, linenum;
1413: int bad_options = 0;
1414:
1.129 djm 1415: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1416: return 0;
1.129 djm 1417:
1.196 dtucker 1418: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1419: struct stat sb;
1.134 deraadt 1420:
1.131 dtucker 1421: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1422: fatal("fstat %s: %s", filename, strerror(errno));
1423: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1424: (sb.st_mode & 022) != 0))
1.129 djm 1425: fatal("Bad owner or permissions on %s", filename);
1426: }
1.17 markus 1427:
1428: debug("Reading configuration data %.200s", filename);
1429:
1.19 markus 1430: /*
1431: * Mark that we are now processing the options. This flag is turned
1432: * on/off by Host specifications.
1433: */
1.17 markus 1434: active = 1;
1435: linenum = 0;
1436: while (fgets(line, sizeof(line), f)) {
1437: /* Update line number counter. */
1438: linenum++;
1.206 djm 1439: if (process_config_line(options, pw, host, line, filename,
1440: linenum, &active, flags & SSHCONF_USERCONF) != 0)
1.17 markus 1441: bad_options++;
1442: }
1443: fclose(f);
1444: if (bad_options > 0)
1.64 millert 1445: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1446: filename, bad_options);
1.89 stevesk 1447: return 1;
1.1 deraadt 1448: }
1449:
1.19 markus 1450: /*
1451: * Initializes options to special values that indicate that they have not yet
1452: * been set. Read_config_file will only set options with this value. Options
1453: * are processed in the following order: command line, user config file,
1454: * system config file. Last, fill_default_options is called.
1455: */
1.1 deraadt 1456:
1.26 markus 1457: void
1.17 markus 1458: initialize_options(Options * options)
1.1 deraadt 1459: {
1.17 markus 1460: memset(options, 'X', sizeof(*options));
1461: options->forward_agent = -1;
1462: options->forward_x11 = -1;
1.123 markus 1463: options->forward_x11_trusted = -1;
1.186 djm 1464: options->forward_x11_timeout = -1;
1.153 markus 1465: options->exit_on_forward_failure = -1;
1.34 markus 1466: options->xauth_location = NULL;
1.17 markus 1467: options->gateway_ports = -1;
1468: options->use_privileged_port = -1;
1469: options->rsa_authentication = -1;
1.50 markus 1470: options->pubkey_authentication = -1;
1.78 markus 1471: options->challenge_response_authentication = -1;
1.118 markus 1472: options->gss_authentication = -1;
1473: options->gss_deleg_creds = -1;
1.17 markus 1474: options->password_authentication = -1;
1.48 markus 1475: options->kbd_interactive_authentication = -1;
1476: options->kbd_interactive_devices = NULL;
1.17 markus 1477: options->rhosts_rsa_authentication = -1;
1.72 markus 1478: options->hostbased_authentication = -1;
1.17 markus 1479: options->batch_mode = -1;
1480: options->check_host_ip = -1;
1481: options->strict_host_key_checking = -1;
1482: options->compression = -1;
1.126 markus 1483: options->tcp_keep_alive = -1;
1.17 markus 1484: options->compression_level = -1;
1485: options->port = -1;
1.114 djm 1486: options->address_family = -1;
1.17 markus 1487: options->connection_attempts = -1;
1.111 djm 1488: options->connection_timeout = -1;
1.17 markus 1489: options->number_of_password_prompts = -1;
1490: options->cipher = -1;
1.25 markus 1491: options->ciphers = NULL;
1.62 markus 1492: options->macs = NULL;
1.189 djm 1493: options->kex_algorithms = NULL;
1.76 markus 1494: options->hostkeyalgorithms = NULL;
1.25 markus 1495: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1496: options->num_identity_files = 0;
1497: options->hostname = NULL;
1.52 markus 1498: options->host_key_alias = NULL;
1.17 markus 1499: options->proxy_command = NULL;
1500: options->user = NULL;
1501: options->escape_char = -1;
1.193 djm 1502: options->num_system_hostfiles = 0;
1503: options->num_user_hostfiles = 0;
1.185 djm 1504: options->local_forwards = NULL;
1.17 markus 1505: options->num_local_forwards = 0;
1.185 djm 1506: options->remote_forwards = NULL;
1.17 markus 1507: options->num_remote_forwards = 0;
1.90 stevesk 1508: options->clear_forwardings = -1;
1.95 markus 1509: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1510: options->preferred_authentications = NULL;
1.77 markus 1511: options->bind_address = NULL;
1.183 markus 1512: options->pkcs11_provider = NULL;
1.101 markus 1513: options->enable_ssh_keysign = - 1;
1.91 markus 1514: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1515: options->identities_only = - 1;
1.105 markus 1516: options->rekey_limit = - 1;
1.198 dtucker 1517: options->rekey_interval = -1;
1.107 jakob 1518: options->verify_host_key_dns = -1;
1.127 markus 1519: options->server_alive_interval = -1;
1520: options->server_alive_count_max = -1;
1.130 djm 1521: options->num_send_env = 0;
1.132 djm 1522: options->control_path = NULL;
1523: options->control_master = -1;
1.187 djm 1524: options->control_persist = -1;
1525: options->control_persist_timeout = 0;
1.136 djm 1526: options->hash_known_hosts = -1;
1.144 reyk 1527: options->tun_open = -1;
1528: options->tun_local = -1;
1529: options->tun_remote = -1;
1530: options->local_command = NULL;
1531: options->permit_local_command = -1;
1.177 andreas 1532: options->use_roaming = -1;
1.167 grunk 1533: options->visual_host_key = -1;
1.190 djm 1534: options->ip_qos_interactive = -1;
1535: options->ip_qos_bulk = -1;
1.192 djm 1536: options->request_tty = -1;
1.205 djm 1537: options->proxy_use_fdpass = -1;
1.199 djm 1538: options->ignored_unknown = NULL;
1.208 djm 1539: options->num_canonical_domains = 0;
1540: options->num_permitted_cnames = 0;
1.209 djm 1541: options->canonicalize_max_dots = -1;
1542: options->canonicalize_fallback_local = -1;
1543: options->canonicalize_hostname = -1;
1.1 deraadt 1544: }
1545:
1.19 markus 1546: /*
1547: * Called after processing other sources of option data, this fills those
1548: * options for which no value has been specified with their default values.
1549: */
1.1 deraadt 1550:
1.26 markus 1551: void
1.17 markus 1552: fill_default_options(Options * options)
1.1 deraadt 1553: {
1.17 markus 1554: if (options->forward_agent == -1)
1.33 markus 1555: options->forward_agent = 0;
1.17 markus 1556: if (options->forward_x11 == -1)
1.23 markus 1557: options->forward_x11 = 0;
1.123 markus 1558: if (options->forward_x11_trusted == -1)
1559: options->forward_x11_trusted = 0;
1.186 djm 1560: if (options->forward_x11_timeout == -1)
1561: options->forward_x11_timeout = 1200;
1.153 markus 1562: if (options->exit_on_forward_failure == -1)
1563: options->exit_on_forward_failure = 0;
1.34 markus 1564: if (options->xauth_location == NULL)
1.80 markus 1565: options->xauth_location = _PATH_XAUTH;
1.17 markus 1566: if (options->gateway_ports == -1)
1567: options->gateway_ports = 0;
1568: if (options->use_privileged_port == -1)
1.65 markus 1569: options->use_privileged_port = 0;
1.17 markus 1570: if (options->rsa_authentication == -1)
1571: options->rsa_authentication = 1;
1.50 markus 1572: if (options->pubkey_authentication == -1)
1573: options->pubkey_authentication = 1;
1.78 markus 1574: if (options->challenge_response_authentication == -1)
1.83 markus 1575: options->challenge_response_authentication = 1;
1.118 markus 1576: if (options->gss_authentication == -1)
1.122 markus 1577: options->gss_authentication = 0;
1.118 markus 1578: if (options->gss_deleg_creds == -1)
1579: options->gss_deleg_creds = 0;
1.17 markus 1580: if (options->password_authentication == -1)
1581: options->password_authentication = 1;
1.48 markus 1582: if (options->kbd_interactive_authentication == -1)
1.59 markus 1583: options->kbd_interactive_authentication = 1;
1.17 markus 1584: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1585: options->rhosts_rsa_authentication = 0;
1.72 markus 1586: if (options->hostbased_authentication == -1)
1587: options->hostbased_authentication = 0;
1.17 markus 1588: if (options->batch_mode == -1)
1589: options->batch_mode = 0;
1590: if (options->check_host_ip == -1)
1591: options->check_host_ip = 1;
1592: if (options->strict_host_key_checking == -1)
1593: options->strict_host_key_checking = 2; /* 2 is default */
1594: if (options->compression == -1)
1595: options->compression = 0;
1.126 markus 1596: if (options->tcp_keep_alive == -1)
1597: options->tcp_keep_alive = 1;
1.17 markus 1598: if (options->compression_level == -1)
1599: options->compression_level = 6;
1600: if (options->port == -1)
1601: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1602: if (options->address_family == -1)
1603: options->address_family = AF_UNSPEC;
1.17 markus 1604: if (options->connection_attempts == -1)
1.84 markus 1605: options->connection_attempts = 1;
1.17 markus 1606: if (options->number_of_password_prompts == -1)
1607: options->number_of_password_prompts = 3;
1608: /* Selected in ssh_login(). */
1609: if (options->cipher == -1)
1610: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1611: /* options->ciphers, default set in myproposals.h */
1.62 markus 1612: /* options->macs, default set in myproposals.h */
1.189 djm 1613: /* options->kex_algorithms, default set in myproposals.h */
1.76 markus 1614: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1615: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1616: options->protocol = SSH_PROTO_2;
1.17 markus 1617: if (options->num_identity_files == 0) {
1.50 markus 1618: if (options->protocol & SSH_PROTO_1) {
1.195 dtucker 1619: add_identity_file(options, "~/",
1620: _PATH_SSH_CLIENT_IDENTITY, 0);
1.50 markus 1621: }
1622: if (options->protocol & SSH_PROTO_2) {
1.195 dtucker 1623: add_identity_file(options, "~/",
1624: _PATH_SSH_CLIENT_ID_RSA, 0);
1625: add_identity_file(options, "~/",
1626: _PATH_SSH_CLIENT_ID_DSA, 0);
1627: add_identity_file(options, "~/",
1628: _PATH_SSH_CLIENT_ID_ECDSA, 0);
1.215 markus 1629: add_identity_file(options, "~/",
1630: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.50 markus 1631: }
1.27 markus 1632: }
1.17 markus 1633: if (options->escape_char == -1)
1634: options->escape_char = '~';
1.193 djm 1635: if (options->num_system_hostfiles == 0) {
1636: options->system_hostfiles[options->num_system_hostfiles++] =
1637: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1638: options->system_hostfiles[options->num_system_hostfiles++] =
1639: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1640: }
1641: if (options->num_user_hostfiles == 0) {
1642: options->user_hostfiles[options->num_user_hostfiles++] =
1643: xstrdup(_PATH_SSH_USER_HOSTFILE);
1644: options->user_hostfiles[options->num_user_hostfiles++] =
1645: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1646: }
1.95 markus 1647: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1648: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1649: if (options->clear_forwardings == 1)
1650: clear_forwardings(options);
1.91 markus 1651: if (options->no_host_authentication_for_localhost == - 1)
1652: options->no_host_authentication_for_localhost = 0;
1.128 markus 1653: if (options->identities_only == -1)
1654: options->identities_only = 0;
1.101 markus 1655: if (options->enable_ssh_keysign == -1)
1656: options->enable_ssh_keysign = 0;
1.105 markus 1657: if (options->rekey_limit == -1)
1658: options->rekey_limit = 0;
1.198 dtucker 1659: if (options->rekey_interval == -1)
1660: options->rekey_interval = 0;
1.107 jakob 1661: if (options->verify_host_key_dns == -1)
1662: options->verify_host_key_dns = 0;
1.127 markus 1663: if (options->server_alive_interval == -1)
1664: options->server_alive_interval = 0;
1665: if (options->server_alive_count_max == -1)
1666: options->server_alive_count_max = 3;
1.132 djm 1667: if (options->control_master == -1)
1668: options->control_master = 0;
1.187 djm 1669: if (options->control_persist == -1) {
1670: options->control_persist = 0;
1671: options->control_persist_timeout = 0;
1672: }
1.136 djm 1673: if (options->hash_known_hosts == -1)
1674: options->hash_known_hosts = 0;
1.144 reyk 1675: if (options->tun_open == -1)
1.145 reyk 1676: options->tun_open = SSH_TUNMODE_NO;
1677: if (options->tun_local == -1)
1678: options->tun_local = SSH_TUNID_ANY;
1679: if (options->tun_remote == -1)
1680: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1681: if (options->permit_local_command == -1)
1682: options->permit_local_command = 0;
1.177 andreas 1683: if (options->use_roaming == -1)
1684: options->use_roaming = 1;
1.167 grunk 1685: if (options->visual_host_key == -1)
1686: options->visual_host_key = 0;
1.190 djm 1687: if (options->ip_qos_interactive == -1)
1688: options->ip_qos_interactive = IPTOS_LOWDELAY;
1689: if (options->ip_qos_bulk == -1)
1690: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1691: if (options->request_tty == -1)
1692: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 1693: if (options->proxy_use_fdpass == -1)
1694: options->proxy_use_fdpass = 0;
1.209 djm 1695: if (options->canonicalize_max_dots == -1)
1696: options->canonicalize_max_dots = 1;
1697: if (options->canonicalize_fallback_local == -1)
1698: options->canonicalize_fallback_local = 1;
1699: if (options->canonicalize_hostname == -1)
1700: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.207 djm 1701: #define CLEAR_ON_NONE(v) \
1702: do { \
1703: if (v != NULL && strcasecmp(v, "none") == 0) { \
1704: free(v); \
1705: v = NULL; \
1706: } \
1707: } while(0)
1708: CLEAR_ON_NONE(options->local_command);
1709: CLEAR_ON_NONE(options->proxy_command);
1710: CLEAR_ON_NONE(options->control_path);
1.17 markus 1711: /* options->user will be set in the main program if appropriate */
1712: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1713: /* options->host_key_alias should not be set by default */
1.67 markus 1714: /* options->preferred_authentications will be set in ssh */
1.135 djm 1715: }
1716:
1717: /*
1718: * parse_forward
1719: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 1720: * dynamicfwd == 0
1.135 djm 1721: * [listenhost:]listenport:connecthost:connectport
1.168 stevesk 1722: * dynamicfwd == 1
1723: * [listenhost:]listenport
1.135 djm 1724: * returns number of arguments parsed or zero on error
1725: */
1726: int
1.176 djm 1727: parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 1728: {
1729: int i;
1730: char *p, *cp, *fwdarg[4];
1731:
1732: memset(fwd, '\0', sizeof(*fwd));
1733:
1734: cp = p = xstrdup(fwdspec);
1735:
1736: /* skip leading spaces */
1.214 deraadt 1737: while (isspace((u_char)*cp))
1.135 djm 1738: cp++;
1739:
1740: for (i = 0; i < 4; ++i)
1741: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1742: break;
1743:
1.170 stevesk 1744: /* Check for trailing garbage */
1.135 djm 1745: if (cp != NULL)
1746: i = 0; /* failure */
1747:
1748: switch (i) {
1.168 stevesk 1749: case 1:
1750: fwd->listen_host = NULL;
1751: fwd->listen_port = a2port(fwdarg[0]);
1752: fwd->connect_host = xstrdup("socks");
1753: break;
1754:
1755: case 2:
1756: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1757: fwd->listen_port = a2port(fwdarg[1]);
1758: fwd->connect_host = xstrdup("socks");
1759: break;
1760:
1.135 djm 1761: case 3:
1762: fwd->listen_host = NULL;
1763: fwd->listen_port = a2port(fwdarg[0]);
1764: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1765: fwd->connect_port = a2port(fwdarg[2]);
1766: break;
1767:
1768: case 4:
1769: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1770: fwd->listen_port = a2port(fwdarg[1]);
1771: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1772: fwd->connect_port = a2port(fwdarg[3]);
1773: break;
1774: default:
1775: i = 0; /* failure */
1776: }
1777:
1.202 djm 1778: free(p);
1.135 djm 1779:
1.168 stevesk 1780: if (dynamicfwd) {
1781: if (!(i == 1 || i == 2))
1782: goto fail_free;
1783: } else {
1784: if (!(i == 3 || i == 4))
1785: goto fail_free;
1.175 djm 1786: if (fwd->connect_port <= 0)
1.168 stevesk 1787: goto fail_free;
1788: }
1789:
1.176 djm 1790: if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0))
1.135 djm 1791: goto fail_free;
1792:
1793: if (fwd->connect_host != NULL &&
1794: strlen(fwd->connect_host) >= NI_MAXHOST)
1795: goto fail_free;
1.176 djm 1796: if (fwd->listen_host != NULL &&
1797: strlen(fwd->listen_host) >= NI_MAXHOST)
1798: goto fail_free;
1799:
1.135 djm 1800:
1801: return (i);
1802:
1803: fail_free:
1.202 djm 1804: free(fwd->connect_host);
1805: fwd->connect_host = NULL;
1806: free(fwd->listen_host);
1807: fwd->listen_host = NULL;
1.135 djm 1808: return (0);
1.1 deraadt 1809: }
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