Annotation of src/usr.bin/ssh/readconf.c, Revision 1.217
1.217 ! djm 1: /* $OpenBSD: readconf.c,v 1.216 2014/01/29 06:18:35 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;
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);
1.217 ! djm 531: if (result != 1) {
! 532: /* skip execution if prior predicate failed */
! 533: debug("%.200s line %d: skipped exec \"%.100s\"",
1.206 djm 534: filename, linenum, cmd);
1.217 ! djm 535: } else {
! 536: r = execute_in_shell(cmd);
! 537: if (r == -1) {
! 538: fatal("%.200s line %d: match exec "
! 539: "'%.100s' error", filename,
! 540: linenum, cmd);
! 541: } else if (r == 0) {
! 542: debug("%.200s line %d: matched "
! 543: "'exec \"%.100s\"'", filename,
! 544: linenum, cmd);
! 545: } else {
! 546: debug("%.200s line %d: no match "
! 547: "'exec \"%.100s\"'", filename,
! 548: linenum, cmd);
! 549: result = 0;
! 550: }
! 551: }
1.206 djm 552: free(cmd);
553: } else {
554: error("Unsupported Match attribute %s", attrib);
1.211 djm 555: result = -1;
556: goto out;
1.206 djm 557: }
1.213 dtucker 558: }
559: if (attributes == 0) {
560: error("One or more attributes required for Match");
561: result = -1;
562: goto out;
1.206 djm 563: }
564: debug3("match %sfound", result ? "" : "not ");
565: *condition = cp;
1.211 djm 566: out:
567: free(host);
1.206 djm 568: return result;
569: }
570:
1.208 djm 571: /* Check and prepare a domain name: removes trailing '.' and lowercases */
572: static void
573: valid_domain(char *name, const char *filename, int linenum)
574: {
575: size_t i, l = strlen(name);
576: u_char c, last = '\0';
577:
578: if (l == 0)
579: fatal("%s line %d: empty hostname suffix", filename, linenum);
580: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
581: fatal("%s line %d: hostname suffix \"%.100s\" "
582: "starts with invalid character", filename, linenum, name);
583: for (i = 0; i < l; i++) {
584: c = tolower((u_char)name[i]);
585: name[i] = (char)c;
586: if (last == '.' && c == '.')
587: fatal("%s line %d: hostname suffix \"%.100s\" contains "
588: "consecutive separators", filename, linenum, name);
589: if (c != '.' && c != '-' && !isalnum(c) &&
590: c != '_') /* technically invalid, but common */
591: fatal("%s line %d: hostname suffix \"%.100s\" contains "
592: "invalid characters", filename, linenum, name);
593: last = c;
594: }
595: if (name[l - 1] == '.')
596: name[l - 1] = '\0';
597: }
598:
1.19 markus 599: /*
1.70 stevesk 600: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 601: */
1.26 markus 602: static OpCodes
1.199 djm 603: parse_token(const char *cp, const char *filename, int linenum,
604: const char *ignored_unknown)
1.1 deraadt 605: {
1.199 djm 606: int i;
1.1 deraadt 607:
1.17 markus 608: for (i = 0; keywords[i].name; i++)
1.199 djm 609: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 610: return keywords[i].opcode;
1.199 djm 611: if (ignored_unknown != NULL && match_pattern_list(cp, ignored_unknown,
612: strlen(ignored_unknown), 1) == 1)
613: return oIgnoredUnknownOption;
1.75 stevesk 614: error("%s: line %d: Bad configuration option: %s",
615: filename, linenum, cp);
1.17 markus 616: return oBadOption;
1.1 deraadt 617: }
618:
1.207 djm 619: /* Multistate option parsing */
620: struct multistate {
621: char *key;
622: int value;
623: };
624: static const struct multistate multistate_flag[] = {
625: { "true", 1 },
626: { "false", 0 },
627: { "yes", 1 },
628: { "no", 0 },
629: { NULL, -1 }
630: };
631: static const struct multistate multistate_yesnoask[] = {
632: { "true", 1 },
633: { "false", 0 },
634: { "yes", 1 },
635: { "no", 0 },
636: { "ask", 2 },
637: { NULL, -1 }
638: };
639: static const struct multistate multistate_addressfamily[] = {
640: { "inet", AF_INET },
641: { "inet6", AF_INET6 },
642: { "any", AF_UNSPEC },
643: { NULL, -1 }
644: };
645: static const struct multistate multistate_controlmaster[] = {
646: { "true", SSHCTL_MASTER_YES },
647: { "yes", SSHCTL_MASTER_YES },
648: { "false", SSHCTL_MASTER_NO },
649: { "no", SSHCTL_MASTER_NO },
650: { "auto", SSHCTL_MASTER_AUTO },
651: { "ask", SSHCTL_MASTER_ASK },
652: { "autoask", SSHCTL_MASTER_AUTO_ASK },
653: { NULL, -1 }
654: };
655: static const struct multistate multistate_tunnel[] = {
656: { "ethernet", SSH_TUNMODE_ETHERNET },
657: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
658: { "true", SSH_TUNMODE_DEFAULT },
659: { "yes", SSH_TUNMODE_DEFAULT },
660: { "false", SSH_TUNMODE_NO },
661: { "no", SSH_TUNMODE_NO },
662: { NULL, -1 }
663: };
664: static const struct multistate multistate_requesttty[] = {
665: { "true", REQUEST_TTY_YES },
666: { "yes", REQUEST_TTY_YES },
667: { "false", REQUEST_TTY_NO },
668: { "no", REQUEST_TTY_NO },
669: { "force", REQUEST_TTY_FORCE },
670: { "auto", REQUEST_TTY_AUTO },
671: { NULL, -1 }
672: };
1.209 djm 673: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 674: { "true", SSH_CANONICALISE_YES },
675: { "false", SSH_CANONICALISE_NO },
676: { "yes", SSH_CANONICALISE_YES },
677: { "no", SSH_CANONICALISE_NO },
678: { "always", SSH_CANONICALISE_ALWAYS },
679: { NULL, -1 }
680: };
1.207 djm 681:
1.19 markus 682: /*
683: * Processes a single option line as used in the configuration files. This
684: * only sets those values that have not already been set.
685: */
1.102 markus 686: #define WHITESPACE " \t\r\n"
1.14 markus 687: int
1.206 djm 688: process_config_line(Options *options, struct passwd *pw, const char *host,
689: char *line, const char *filename, int linenum, int *activep, int userconfig)
1.1 deraadt 690: {
1.193 djm 691: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
692: char **cpptr, fwdarg[256];
1.199 djm 693: u_int i, *uintptr, max_entries = 0;
1.206 djm 694: int negated, opcode, *intptr, value, value2, cmdline = 0;
1.164 dtucker 695: LogLevel *log_level_ptr;
1.201 dtucker 696: long long val64;
1.102 markus 697: size_t len;
1.135 djm 698: Forward fwd;
1.207 djm 699: const struct multistate *multistate_ptr;
1.208 djm 700: struct allowed_cname *cname;
1.106 djm 701:
1.206 djm 702: if (activep == NULL) { /* We are processing a command line directive */
703: cmdline = 1;
704: activep = &cmdline;
705: }
706:
1.106 djm 707: /* Strip trailing whitespace */
1.139 deraadt 708: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 709: if (strchr(WHITESPACE, line[len]) == NULL)
710: break;
711: line[len] = '\0';
712: }
1.1 deraadt 713:
1.42 provos 714: s = line;
715: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 716: if ((keyword = strdelim(&s)) == NULL)
717: return 0;
1.42 provos 718: /* Ignore leading whitespace. */
719: if (*keyword == '\0')
1.43 markus 720: keyword = strdelim(&s);
1.56 deraadt 721: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 722: return 0;
1.199 djm 723: /* Match lowercase keyword */
1.207 djm 724: lowercase(keyword);
1.17 markus 725:
1.199 djm 726: opcode = parse_token(keyword, filename, linenum,
727: options->ignored_unknown);
1.17 markus 728:
729: switch (opcode) {
730: case oBadOption:
1.19 markus 731: /* don't panic, but count bad options */
732: return -1;
1.17 markus 733: /* NOTREACHED */
1.199 djm 734: case oIgnoredUnknownOption:
735: debug("%s line %d: Ignored unknown option \"%s\"",
736: filename, linenum, keyword);
737: return 0;
1.111 djm 738: case oConnectTimeout:
739: intptr = &options->connection_timeout;
1.127 markus 740: parse_time:
1.111 djm 741: arg = strdelim(&s);
742: if (!arg || *arg == '\0')
743: fatal("%s line %d: missing time value.",
744: filename, linenum);
745: if ((value = convtime(arg)) == -1)
746: fatal("%s line %d: invalid time value.",
747: filename, linenum);
1.160 dtucker 748: if (*activep && *intptr == -1)
1.111 djm 749: *intptr = value;
750: break;
751:
1.17 markus 752: case oForwardAgent:
753: intptr = &options->forward_agent;
1.207 djm 754: parse_flag:
755: multistate_ptr = multistate_flag;
756: parse_multistate:
1.42 provos 757: arg = strdelim(&s);
1.40 ho 758: if (!arg || *arg == '\0')
1.207 djm 759: fatal("%s line %d: missing argument.",
760: filename, linenum);
761: value = -1;
762: for (i = 0; multistate_ptr[i].key != NULL; i++) {
763: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
764: value = multistate_ptr[i].value;
765: break;
766: }
767: }
768: if (value == -1)
769: fatal("%s line %d: unsupported option \"%s\".",
770: filename, linenum, arg);
1.17 markus 771: if (*activep && *intptr == -1)
772: *intptr = value;
773: break;
774:
775: case oForwardX11:
776: intptr = &options->forward_x11;
777: goto parse_flag;
778:
1.123 markus 779: case oForwardX11Trusted:
780: intptr = &options->forward_x11_trusted;
781: goto parse_flag;
1.186 djm 782:
783: case oForwardX11Timeout:
784: intptr = &options->forward_x11_timeout;
785: goto parse_time;
1.123 markus 786:
1.17 markus 787: case oGatewayPorts:
788: intptr = &options->gateway_ports;
789: goto parse_flag;
790:
1.153 markus 791: case oExitOnForwardFailure:
792: intptr = &options->exit_on_forward_failure;
793: goto parse_flag;
794:
1.17 markus 795: case oUsePrivilegedPort:
796: intptr = &options->use_privileged_port;
797: goto parse_flag;
798:
799: case oPasswordAuthentication:
800: intptr = &options->password_authentication;
801: goto parse_flag;
802:
1.48 markus 803: case oKbdInteractiveAuthentication:
804: intptr = &options->kbd_interactive_authentication;
805: goto parse_flag;
806:
807: case oKbdInteractiveDevices:
808: charptr = &options->kbd_interactive_devices;
809: goto parse_string;
810:
1.50 markus 811: case oPubkeyAuthentication:
812: intptr = &options->pubkey_authentication;
1.30 markus 813: goto parse_flag;
814:
1.17 markus 815: case oRSAAuthentication:
816: intptr = &options->rsa_authentication;
817: goto parse_flag;
818:
819: case oRhostsRSAAuthentication:
820: intptr = &options->rhosts_rsa_authentication;
821: goto parse_flag;
822:
1.72 markus 823: case oHostbasedAuthentication:
824: intptr = &options->hostbased_authentication;
825: goto parse_flag;
826:
1.59 markus 827: case oChallengeResponseAuthentication:
1.78 markus 828: intptr = &options->challenge_response_authentication;
1.17 markus 829: goto parse_flag;
1.108 jakob 830:
1.118 markus 831: case oGssAuthentication:
832: intptr = &options->gss_authentication;
833: goto parse_flag;
834:
835: case oGssDelegateCreds:
836: intptr = &options->gss_deleg_creds;
837: goto parse_flag;
838:
1.17 markus 839: case oBatchMode:
840: intptr = &options->batch_mode;
841: goto parse_flag;
842:
843: case oCheckHostIP:
844: intptr = &options->check_host_ip;
1.167 grunk 845: goto parse_flag;
1.17 markus 846:
1.107 jakob 847: case oVerifyHostKeyDNS:
848: intptr = &options->verify_host_key_dns;
1.207 djm 849: multistate_ptr = multistate_yesnoask;
850: goto parse_multistate;
1.107 jakob 851:
1.17 markus 852: case oStrictHostKeyChecking:
853: intptr = &options->strict_host_key_checking;
1.207 djm 854: multistate_ptr = multistate_yesnoask;
855: goto parse_multistate;
1.17 markus 856:
857: case oCompression:
858: intptr = &options->compression;
859: goto parse_flag;
860:
1.126 markus 861: case oTCPKeepAlive:
862: intptr = &options->tcp_keep_alive;
1.17 markus 863: goto parse_flag;
864:
1.91 markus 865: case oNoHostAuthenticationForLocalhost:
866: intptr = &options->no_host_authentication_for_localhost;
867: goto parse_flag;
868:
1.17 markus 869: case oNumberOfPasswordPrompts:
870: intptr = &options->number_of_password_prompts;
871: goto parse_int;
872:
873: case oCompressionLevel:
874: intptr = &options->compression_level;
875: goto parse_int;
876:
1.105 markus 877: case oRekeyLimit:
878: arg = strdelim(&s);
879: if (!arg || *arg == '\0')
1.198 dtucker 880: fatal("%.200s line %d: Missing argument.", filename,
881: linenum);
882: if (strcmp(arg, "default") == 0) {
883: val64 = 0;
884: } else {
1.200 dtucker 885: if (scan_scaled(arg, &val64) == -1)
886: fatal("%.200s line %d: Bad number '%s': %s",
887: filename, linenum, arg, strerror(errno));
888: /* check for too-large or too-small limits */
889: if (val64 > UINT_MAX)
1.198 dtucker 890: fatal("%.200s line %d: RekeyLimit too large",
891: filename, linenum);
892: if (val64 != 0 && val64 < 16)
893: fatal("%.200s line %d: RekeyLimit too small",
894: filename, linenum);
1.105 markus 895: }
1.165 djm 896: if (*activep && options->rekey_limit == -1)
897: options->rekey_limit = (u_int32_t)val64;
1.198 dtucker 898: if (s != NULL) { /* optional rekey interval present */
899: if (strcmp(s, "none") == 0) {
900: (void)strdelim(&s); /* discard */
901: break;
902: }
903: intptr = &options->rekey_interval;
904: goto parse_time;
905: }
1.105 markus 906: break;
907:
1.17 markus 908: case oIdentityFile:
1.42 provos 909: arg = strdelim(&s);
1.40 ho 910: if (!arg || *arg == '\0')
1.17 markus 911: fatal("%.200s line %d: Missing argument.", filename, linenum);
912: if (*activep) {
1.50 markus 913: intptr = &options->num_identity_files;
1.27 markus 914: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 915: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 916: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.196 dtucker 917: add_identity_file(options, NULL, arg, userconfig);
1.17 markus 918: }
919: break;
920:
1.34 markus 921: case oXAuthLocation:
922: charptr=&options->xauth_location;
923: goto parse_string;
924:
1.17 markus 925: case oUser:
926: charptr = &options->user;
927: parse_string:
1.42 provos 928: arg = strdelim(&s);
1.40 ho 929: if (!arg || *arg == '\0')
1.193 djm 930: fatal("%.200s line %d: Missing argument.",
931: filename, linenum);
1.17 markus 932: if (*activep && *charptr == NULL)
1.38 provos 933: *charptr = xstrdup(arg);
1.17 markus 934: break;
935:
936: case oGlobalKnownHostsFile:
1.193 djm 937: cpptr = (char **)&options->system_hostfiles;
938: uintptr = &options->num_system_hostfiles;
939: max_entries = SSH_MAX_HOSTS_FILES;
940: parse_char_array:
941: if (*activep && *uintptr == 0) {
942: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
943: if ((*uintptr) >= max_entries)
944: fatal("%s line %d: "
945: "too many authorized keys files.",
946: filename, linenum);
947: cpptr[(*uintptr)++] = xstrdup(arg);
948: }
949: }
950: return 0;
1.17 markus 951:
952: case oUserKnownHostsFile:
1.193 djm 953: cpptr = (char **)&options->user_hostfiles;
954: uintptr = &options->num_user_hostfiles;
955: max_entries = SSH_MAX_HOSTS_FILES;
956: goto parse_char_array;
1.27 markus 957:
1.17 markus 958: case oHostName:
959: charptr = &options->hostname;
960: goto parse_string;
961:
1.52 markus 962: case oHostKeyAlias:
963: charptr = &options->host_key_alias;
964: goto parse_string;
965:
1.67 markus 966: case oPreferredAuthentications:
967: charptr = &options->preferred_authentications;
968: goto parse_string;
969:
1.77 markus 970: case oBindAddress:
971: charptr = &options->bind_address;
972: goto parse_string;
973:
1.183 markus 974: case oPKCS11Provider:
975: charptr = &options->pkcs11_provider;
1.86 markus 976: goto parse_string;
1.85 jakob 977:
1.17 markus 978: case oProxyCommand:
1.144 reyk 979: charptr = &options->proxy_command;
980: parse_command:
1.113 markus 981: if (s == NULL)
982: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 983: len = strspn(s, WHITESPACE "=");
1.17 markus 984: if (*activep && *charptr == NULL)
1.102 markus 985: *charptr = xstrdup(s + len);
1.17 markus 986: return 0;
987:
988: case oPort:
989: intptr = &options->port;
990: parse_int:
1.42 provos 991: arg = strdelim(&s);
1.40 ho 992: if (!arg || *arg == '\0')
1.17 markus 993: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 994: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 995: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 996:
997: /* Octal, decimal, or hex format? */
1.38 provos 998: value = strtol(arg, &endofnumber, 0);
999: if (arg == endofnumber)
1.21 markus 1000: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 1001: if (*activep && *intptr == -1)
1002: *intptr = value;
1003: break;
1004:
1005: case oConnectionAttempts:
1006: intptr = &options->connection_attempts;
1007: goto parse_int;
1008:
1009: case oCipher:
1010: intptr = &options->cipher;
1.42 provos 1011: arg = strdelim(&s);
1.40 ho 1012: if (!arg || *arg == '\0')
1.32 markus 1013: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1014: value = cipher_number(arg);
1.17 markus 1015: if (value == -1)
1016: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 1017: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 1018: if (*activep && *intptr == -1)
1019: *intptr = value;
1020: break;
1021:
1.25 markus 1022: case oCiphers:
1.42 provos 1023: arg = strdelim(&s);
1.40 ho 1024: if (!arg || *arg == '\0')
1.32 markus 1025: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1026: if (!ciphers_valid(arg))
1.31 markus 1027: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1028: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1029: if (*activep && options->ciphers == NULL)
1.38 provos 1030: options->ciphers = xstrdup(arg);
1.25 markus 1031: break;
1032:
1.62 markus 1033: case oMacs:
1034: arg = strdelim(&s);
1035: if (!arg || *arg == '\0')
1036: fatal("%.200s line %d: Missing argument.", filename, linenum);
1037: if (!mac_valid(arg))
1038: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1039: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1040: if (*activep && options->macs == NULL)
1041: options->macs = xstrdup(arg);
1042: break;
1043:
1.189 djm 1044: case oKexAlgorithms:
1045: arg = strdelim(&s);
1046: if (!arg || *arg == '\0')
1047: fatal("%.200s line %d: Missing argument.",
1048: filename, linenum);
1049: if (!kex_names_valid(arg))
1050: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1051: filename, linenum, arg ? arg : "<NONE>");
1052: if (*activep && options->kex_algorithms == NULL)
1053: options->kex_algorithms = xstrdup(arg);
1054: break;
1055:
1.76 markus 1056: case oHostKeyAlgorithms:
1057: arg = strdelim(&s);
1058: if (!arg || *arg == '\0')
1059: fatal("%.200s line %d: Missing argument.", filename, linenum);
1060: if (!key_names_valid2(arg))
1061: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 1062: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 1063: if (*activep && options->hostkeyalgorithms == NULL)
1064: options->hostkeyalgorithms = xstrdup(arg);
1065: break;
1066:
1.25 markus 1067: case oProtocol:
1068: intptr = &options->protocol;
1.42 provos 1069: arg = strdelim(&s);
1.40 ho 1070: if (!arg || *arg == '\0')
1.32 markus 1071: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1072: value = proto_spec(arg);
1.25 markus 1073: if (value == SSH_PROTO_UNKNOWN)
1074: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 1075: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1076: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
1077: *intptr = value;
1078: break;
1079:
1.17 markus 1080: case oLogLevel:
1.164 dtucker 1081: log_level_ptr = &options->log_level;
1.42 provos 1082: arg = strdelim(&s);
1.38 provos 1083: value = log_level_number(arg);
1.95 markus 1084: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1085: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1086: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1087: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1088: *log_level_ptr = (LogLevel) value;
1.17 markus 1089: break;
1090:
1.88 stevesk 1091: case oLocalForward:
1.17 markus 1092: case oRemoteForward:
1.168 stevesk 1093: case oDynamicForward:
1.42 provos 1094: arg = strdelim(&s);
1.135 djm 1095: if (arg == NULL || *arg == '\0')
1.88 stevesk 1096: fatal("%.200s line %d: Missing port argument.",
1097: filename, linenum);
1.135 djm 1098:
1.168 stevesk 1099: if (opcode == oLocalForward ||
1100: opcode == oRemoteForward) {
1101: arg2 = strdelim(&s);
1102: if (arg2 == NULL || *arg2 == '\0')
1103: fatal("%.200s line %d: Missing target argument.",
1104: filename, linenum);
1.135 djm 1105:
1.168 stevesk 1106: /* construct a string for parse_forward */
1107: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1108: } else if (opcode == oDynamicForward) {
1109: strlcpy(fwdarg, arg, sizeof(fwdarg));
1110: }
1111:
1112: if (parse_forward(&fwd, fwdarg,
1.176 djm 1113: opcode == oDynamicForward ? 1 : 0,
1114: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1115: fatal("%.200s line %d: Bad forwarding specification.",
1116: filename, linenum);
1.135 djm 1117:
1.88 stevesk 1118: if (*activep) {
1.168 stevesk 1119: if (opcode == oLocalForward ||
1120: opcode == oDynamicForward)
1.135 djm 1121: add_local_forward(options, &fwd);
1.88 stevesk 1122: else if (opcode == oRemoteForward)
1.135 djm 1123: add_remote_forward(options, &fwd);
1.88 stevesk 1124: }
1.17 markus 1125: break;
1.71 markus 1126:
1.90 stevesk 1127: case oClearAllForwardings:
1128: intptr = &options->clear_forwardings;
1129: goto parse_flag;
1130:
1.17 markus 1131: case oHost:
1.206 djm 1132: if (cmdline)
1133: fatal("Host directive not supported as a command-line "
1134: "option");
1.17 markus 1135: *activep = 0;
1.191 djm 1136: arg2 = NULL;
1137: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1138: negated = *arg == '!';
1139: if (negated)
1140: arg++;
1.38 provos 1141: if (match_pattern(host, arg)) {
1.191 djm 1142: if (negated) {
1143: debug("%.200s line %d: Skipping Host "
1144: "block because of negated match "
1145: "for %.100s", filename, linenum,
1146: arg);
1147: *activep = 0;
1148: break;
1149: }
1150: if (!*activep)
1151: arg2 = arg; /* logged below */
1.17 markus 1152: *activep = 1;
1153: }
1.191 djm 1154: }
1155: if (*activep)
1156: debug("%.200s line %d: Applying options for %.100s",
1157: filename, linenum, arg2);
1.42 provos 1158: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1159: return 0;
1160:
1.206 djm 1161: case oMatch:
1162: if (cmdline)
1163: fatal("Host directive not supported as a command-line "
1164: "option");
1165: value = match_cfg_line(options, &s, pw, host,
1166: filename, linenum);
1167: if (value < 0)
1168: fatal("%.200s line %d: Bad Match condition", filename,
1169: linenum);
1170: *activep = value;
1171: break;
1172:
1.17 markus 1173: case oEscapeChar:
1174: intptr = &options->escape_char;
1.42 provos 1175: arg = strdelim(&s);
1.40 ho 1176: if (!arg || *arg == '\0')
1.17 markus 1177: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1178: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1179: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1180: value = (u_char) arg[1] & 31;
1.38 provos 1181: else if (strlen(arg) == 1)
1.51 markus 1182: value = (u_char) arg[0];
1.38 provos 1183: else if (strcmp(arg, "none") == 0)
1.79 stevesk 1184: value = SSH_ESCAPECHAR_NONE;
1.17 markus 1185: else {
1186: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1187: filename, linenum);
1.17 markus 1188: /* NOTREACHED */
1189: value = 0; /* Avoid compiler warning. */
1190: }
1191: if (*activep && *intptr == -1)
1192: *intptr = value;
1.112 djm 1193: break;
1194:
1195: case oAddressFamily:
1.114 djm 1196: intptr = &options->address_family;
1.207 djm 1197: multistate_ptr = multistate_addressfamily;
1198: goto parse_multistate;
1.17 markus 1199:
1.101 markus 1200: case oEnableSSHKeysign:
1201: intptr = &options->enable_ssh_keysign;
1202: goto parse_flag;
1203:
1.128 markus 1204: case oIdentitiesOnly:
1205: intptr = &options->identities_only;
1206: goto parse_flag;
1207:
1.127 markus 1208: case oServerAliveInterval:
1209: intptr = &options->server_alive_interval;
1210: goto parse_time;
1211:
1212: case oServerAliveCountMax:
1213: intptr = &options->server_alive_count_max;
1214: goto parse_int;
1215:
1.130 djm 1216: case oSendEnv:
1217: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1218: if (strchr(arg, '=') != NULL)
1219: fatal("%s line %d: Invalid environment name.",
1220: filename, linenum);
1.137 djm 1221: if (!*activep)
1222: continue;
1.130 djm 1223: if (options->num_send_env >= MAX_SEND_ENV)
1224: fatal("%s line %d: too many send env.",
1225: filename, linenum);
1226: options->send_env[options->num_send_env++] =
1227: xstrdup(arg);
1228: }
1229: break;
1230:
1.132 djm 1231: case oControlPath:
1232: charptr = &options->control_path;
1233: goto parse_string;
1234:
1235: case oControlMaster:
1236: intptr = &options->control_master;
1.207 djm 1237: multistate_ptr = multistate_controlmaster;
1238: goto parse_multistate;
1.132 djm 1239:
1.187 djm 1240: case oControlPersist:
1241: /* no/false/yes/true, or a time spec */
1242: intptr = &options->control_persist;
1243: arg = strdelim(&s);
1244: if (!arg || *arg == '\0')
1245: fatal("%.200s line %d: Missing ControlPersist"
1246: " argument.", filename, linenum);
1247: value = 0;
1248: value2 = 0; /* timeout */
1249: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1250: value = 0;
1251: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1252: value = 1;
1253: else if ((value2 = convtime(arg)) >= 0)
1254: value = 1;
1255: else
1256: fatal("%.200s line %d: Bad ControlPersist argument.",
1257: filename, linenum);
1258: if (*activep && *intptr == -1) {
1259: *intptr = value;
1260: options->control_persist_timeout = value2;
1261: }
1262: break;
1263:
1.136 djm 1264: case oHashKnownHosts:
1265: intptr = &options->hash_known_hosts;
1266: goto parse_flag;
1267:
1.144 reyk 1268: case oTunnel:
1269: intptr = &options->tun_open;
1.207 djm 1270: multistate_ptr = multistate_tunnel;
1271: goto parse_multistate;
1.144 reyk 1272:
1273: case oTunnelDevice:
1274: arg = strdelim(&s);
1275: if (!arg || *arg == '\0')
1276: fatal("%.200s line %d: Missing argument.", filename, linenum);
1277: value = a2tun(arg, &value2);
1.145 reyk 1278: if (value == SSH_TUNID_ERR)
1.144 reyk 1279: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1280: if (*activep) {
1281: options->tun_local = value;
1282: options->tun_remote = value2;
1283: }
1284: break;
1285:
1286: case oLocalCommand:
1287: charptr = &options->local_command;
1288: goto parse_command;
1289:
1290: case oPermitLocalCommand:
1291: intptr = &options->permit_local_command;
1292: goto parse_flag;
1293:
1.167 grunk 1294: case oVisualHostKey:
1295: intptr = &options->visual_host_key;
1296: goto parse_flag;
1297:
1.190 djm 1298: case oIPQoS:
1299: arg = strdelim(&s);
1300: if ((value = parse_ipqos(arg)) == -1)
1301: fatal("%s line %d: Bad IPQoS value: %s",
1302: filename, linenum, arg);
1303: arg = strdelim(&s);
1304: if (arg == NULL)
1305: value2 = value;
1306: else if ((value2 = parse_ipqos(arg)) == -1)
1307: fatal("%s line %d: Bad IPQoS value: %s",
1308: filename, linenum, arg);
1309: if (*activep) {
1310: options->ip_qos_interactive = value;
1311: options->ip_qos_bulk = value2;
1312: }
1313: break;
1314:
1.177 andreas 1315: case oUseRoaming:
1316: intptr = &options->use_roaming;
1317: goto parse_flag;
1318:
1.192 djm 1319: case oRequestTTY:
1320: intptr = &options->request_tty;
1.207 djm 1321: multistate_ptr = multistate_requesttty;
1322: goto parse_multistate;
1.192 djm 1323:
1.199 djm 1324: case oIgnoreUnknown:
1325: charptr = &options->ignored_unknown;
1326: goto parse_string;
1327:
1.205 djm 1328: case oProxyUseFdpass:
1329: intptr = &options->proxy_use_fdpass;
1330: goto parse_flag;
1331:
1.208 djm 1332: case oCanonicalDomains:
1333: value = options->num_canonical_domains != 0;
1334: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1335: valid_domain(arg, filename, linenum);
1336: if (!*activep || value)
1337: continue;
1338: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1339: fatal("%s line %d: too many hostname suffixes.",
1340: filename, linenum);
1341: options->canonical_domains[
1342: options->num_canonical_domains++] = xstrdup(arg);
1343: }
1344: break;
1345:
1.209 djm 1346: case oCanonicalizePermittedCNAMEs:
1.208 djm 1347: value = options->num_permitted_cnames != 0;
1348: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1349: /* Either '*' for everything or 'list:list' */
1350: if (strcmp(arg, "*") == 0)
1351: arg2 = arg;
1352: else {
1353: lowercase(arg);
1354: if ((arg2 = strchr(arg, ':')) == NULL ||
1355: arg2[1] == '\0') {
1356: fatal("%s line %d: "
1357: "Invalid permitted CNAME \"%s\"",
1358: filename, linenum, arg);
1359: }
1360: *arg2 = '\0';
1361: arg2++;
1362: }
1363: if (!*activep || value)
1364: continue;
1365: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1366: fatal("%s line %d: too many permitted CNAMEs.",
1367: filename, linenum);
1368: cname = options->permitted_cnames +
1369: options->num_permitted_cnames++;
1370: cname->source_list = xstrdup(arg);
1371: cname->target_list = xstrdup(arg2);
1372: }
1373: break;
1374:
1.209 djm 1375: case oCanonicalizeHostname:
1376: intptr = &options->canonicalize_hostname;
1377: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1378: goto parse_multistate;
1379:
1.209 djm 1380: case oCanonicalizeMaxDots:
1381: intptr = &options->canonicalize_max_dots;
1.208 djm 1382: goto parse_int;
1383:
1.209 djm 1384: case oCanonicalizeFallbackLocal:
1385: intptr = &options->canonicalize_fallback_local;
1.208 djm 1386: goto parse_flag;
1387:
1.96 markus 1388: case oDeprecated:
1.98 markus 1389: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1390: filename, linenum, keyword);
1.98 markus 1391: return 0;
1.96 markus 1392:
1.110 jakob 1393: case oUnsupported:
1394: error("%s line %d: Unsupported option \"%s\"",
1395: filename, linenum, keyword);
1396: return 0;
1397:
1.17 markus 1398: default:
1399: fatal("process_config_line: Unimplemented opcode %d", opcode);
1400: }
1401:
1402: /* Check that there is no garbage at end of line. */
1.57 djm 1403: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1404: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1405: filename, linenum, arg);
1.39 ho 1406: }
1.17 markus 1407: return 0;
1.1 deraadt 1408: }
1409:
1410:
1.19 markus 1411: /*
1412: * Reads the config file and modifies the options accordingly. Options
1413: * should already be initialized before this call. This never returns if
1.89 stevesk 1414: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1415: */
1.1 deraadt 1416:
1.89 stevesk 1417: int
1.206 djm 1418: read_config_file(const char *filename, struct passwd *pw, const char *host,
1419: Options *options, int flags)
1.1 deraadt 1420: {
1.17 markus 1421: FILE *f;
1422: char line[1024];
1423: int active, linenum;
1424: int bad_options = 0;
1425:
1.129 djm 1426: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1427: return 0;
1.129 djm 1428:
1.196 dtucker 1429: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1430: struct stat sb;
1.134 deraadt 1431:
1.131 dtucker 1432: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1433: fatal("fstat %s: %s", filename, strerror(errno));
1434: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1435: (sb.st_mode & 022) != 0))
1.129 djm 1436: fatal("Bad owner or permissions on %s", filename);
1437: }
1.17 markus 1438:
1439: debug("Reading configuration data %.200s", filename);
1440:
1.19 markus 1441: /*
1442: * Mark that we are now processing the options. This flag is turned
1443: * on/off by Host specifications.
1444: */
1.17 markus 1445: active = 1;
1446: linenum = 0;
1447: while (fgets(line, sizeof(line), f)) {
1448: /* Update line number counter. */
1449: linenum++;
1.206 djm 1450: if (process_config_line(options, pw, host, line, filename,
1451: linenum, &active, flags & SSHCONF_USERCONF) != 0)
1.17 markus 1452: bad_options++;
1453: }
1454: fclose(f);
1455: if (bad_options > 0)
1.64 millert 1456: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1457: filename, bad_options);
1.89 stevesk 1458: return 1;
1.1 deraadt 1459: }
1460:
1.19 markus 1461: /*
1462: * Initializes options to special values that indicate that they have not yet
1463: * been set. Read_config_file will only set options with this value. Options
1464: * are processed in the following order: command line, user config file,
1465: * system config file. Last, fill_default_options is called.
1466: */
1.1 deraadt 1467:
1.26 markus 1468: void
1.17 markus 1469: initialize_options(Options * options)
1.1 deraadt 1470: {
1.17 markus 1471: memset(options, 'X', sizeof(*options));
1472: options->forward_agent = -1;
1473: options->forward_x11 = -1;
1.123 markus 1474: options->forward_x11_trusted = -1;
1.186 djm 1475: options->forward_x11_timeout = -1;
1.153 markus 1476: options->exit_on_forward_failure = -1;
1.34 markus 1477: options->xauth_location = NULL;
1.17 markus 1478: options->gateway_ports = -1;
1479: options->use_privileged_port = -1;
1480: options->rsa_authentication = -1;
1.50 markus 1481: options->pubkey_authentication = -1;
1.78 markus 1482: options->challenge_response_authentication = -1;
1.118 markus 1483: options->gss_authentication = -1;
1484: options->gss_deleg_creds = -1;
1.17 markus 1485: options->password_authentication = -1;
1.48 markus 1486: options->kbd_interactive_authentication = -1;
1487: options->kbd_interactive_devices = NULL;
1.17 markus 1488: options->rhosts_rsa_authentication = -1;
1.72 markus 1489: options->hostbased_authentication = -1;
1.17 markus 1490: options->batch_mode = -1;
1491: options->check_host_ip = -1;
1492: options->strict_host_key_checking = -1;
1493: options->compression = -1;
1.126 markus 1494: options->tcp_keep_alive = -1;
1.17 markus 1495: options->compression_level = -1;
1496: options->port = -1;
1.114 djm 1497: options->address_family = -1;
1.17 markus 1498: options->connection_attempts = -1;
1.111 djm 1499: options->connection_timeout = -1;
1.17 markus 1500: options->number_of_password_prompts = -1;
1501: options->cipher = -1;
1.25 markus 1502: options->ciphers = NULL;
1.62 markus 1503: options->macs = NULL;
1.189 djm 1504: options->kex_algorithms = NULL;
1.76 markus 1505: options->hostkeyalgorithms = NULL;
1.25 markus 1506: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1507: options->num_identity_files = 0;
1508: options->hostname = NULL;
1.52 markus 1509: options->host_key_alias = NULL;
1.17 markus 1510: options->proxy_command = NULL;
1511: options->user = NULL;
1512: options->escape_char = -1;
1.193 djm 1513: options->num_system_hostfiles = 0;
1514: options->num_user_hostfiles = 0;
1.185 djm 1515: options->local_forwards = NULL;
1.17 markus 1516: options->num_local_forwards = 0;
1.185 djm 1517: options->remote_forwards = NULL;
1.17 markus 1518: options->num_remote_forwards = 0;
1.90 stevesk 1519: options->clear_forwardings = -1;
1.95 markus 1520: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1521: options->preferred_authentications = NULL;
1.77 markus 1522: options->bind_address = NULL;
1.183 markus 1523: options->pkcs11_provider = NULL;
1.101 markus 1524: options->enable_ssh_keysign = - 1;
1.91 markus 1525: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1526: options->identities_only = - 1;
1.105 markus 1527: options->rekey_limit = - 1;
1.198 dtucker 1528: options->rekey_interval = -1;
1.107 jakob 1529: options->verify_host_key_dns = -1;
1.127 markus 1530: options->server_alive_interval = -1;
1531: options->server_alive_count_max = -1;
1.130 djm 1532: options->num_send_env = 0;
1.132 djm 1533: options->control_path = NULL;
1534: options->control_master = -1;
1.187 djm 1535: options->control_persist = -1;
1536: options->control_persist_timeout = 0;
1.136 djm 1537: options->hash_known_hosts = -1;
1.144 reyk 1538: options->tun_open = -1;
1539: options->tun_local = -1;
1540: options->tun_remote = -1;
1541: options->local_command = NULL;
1542: options->permit_local_command = -1;
1.177 andreas 1543: options->use_roaming = -1;
1.167 grunk 1544: options->visual_host_key = -1;
1.190 djm 1545: options->ip_qos_interactive = -1;
1546: options->ip_qos_bulk = -1;
1.192 djm 1547: options->request_tty = -1;
1.205 djm 1548: options->proxy_use_fdpass = -1;
1.199 djm 1549: options->ignored_unknown = NULL;
1.208 djm 1550: options->num_canonical_domains = 0;
1551: options->num_permitted_cnames = 0;
1.209 djm 1552: options->canonicalize_max_dots = -1;
1553: options->canonicalize_fallback_local = -1;
1554: options->canonicalize_hostname = -1;
1.1 deraadt 1555: }
1556:
1.19 markus 1557: /*
1558: * Called after processing other sources of option data, this fills those
1559: * options for which no value has been specified with their default values.
1560: */
1.1 deraadt 1561:
1.26 markus 1562: void
1.17 markus 1563: fill_default_options(Options * options)
1.1 deraadt 1564: {
1.17 markus 1565: if (options->forward_agent == -1)
1.33 markus 1566: options->forward_agent = 0;
1.17 markus 1567: if (options->forward_x11 == -1)
1.23 markus 1568: options->forward_x11 = 0;
1.123 markus 1569: if (options->forward_x11_trusted == -1)
1570: options->forward_x11_trusted = 0;
1.186 djm 1571: if (options->forward_x11_timeout == -1)
1572: options->forward_x11_timeout = 1200;
1.153 markus 1573: if (options->exit_on_forward_failure == -1)
1574: options->exit_on_forward_failure = 0;
1.34 markus 1575: if (options->xauth_location == NULL)
1.80 markus 1576: options->xauth_location = _PATH_XAUTH;
1.17 markus 1577: if (options->gateway_ports == -1)
1578: options->gateway_ports = 0;
1579: if (options->use_privileged_port == -1)
1.65 markus 1580: options->use_privileged_port = 0;
1.17 markus 1581: if (options->rsa_authentication == -1)
1582: options->rsa_authentication = 1;
1.50 markus 1583: if (options->pubkey_authentication == -1)
1584: options->pubkey_authentication = 1;
1.78 markus 1585: if (options->challenge_response_authentication == -1)
1.83 markus 1586: options->challenge_response_authentication = 1;
1.118 markus 1587: if (options->gss_authentication == -1)
1.122 markus 1588: options->gss_authentication = 0;
1.118 markus 1589: if (options->gss_deleg_creds == -1)
1590: options->gss_deleg_creds = 0;
1.17 markus 1591: if (options->password_authentication == -1)
1592: options->password_authentication = 1;
1.48 markus 1593: if (options->kbd_interactive_authentication == -1)
1.59 markus 1594: options->kbd_interactive_authentication = 1;
1.17 markus 1595: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1596: options->rhosts_rsa_authentication = 0;
1.72 markus 1597: if (options->hostbased_authentication == -1)
1598: options->hostbased_authentication = 0;
1.17 markus 1599: if (options->batch_mode == -1)
1600: options->batch_mode = 0;
1601: if (options->check_host_ip == -1)
1602: options->check_host_ip = 1;
1603: if (options->strict_host_key_checking == -1)
1604: options->strict_host_key_checking = 2; /* 2 is default */
1605: if (options->compression == -1)
1606: options->compression = 0;
1.126 markus 1607: if (options->tcp_keep_alive == -1)
1608: options->tcp_keep_alive = 1;
1.17 markus 1609: if (options->compression_level == -1)
1610: options->compression_level = 6;
1611: if (options->port == -1)
1612: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1613: if (options->address_family == -1)
1614: options->address_family = AF_UNSPEC;
1.17 markus 1615: if (options->connection_attempts == -1)
1.84 markus 1616: options->connection_attempts = 1;
1.17 markus 1617: if (options->number_of_password_prompts == -1)
1618: options->number_of_password_prompts = 3;
1619: /* Selected in ssh_login(). */
1620: if (options->cipher == -1)
1621: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1622: /* options->ciphers, default set in myproposals.h */
1.62 markus 1623: /* options->macs, default set in myproposals.h */
1.189 djm 1624: /* options->kex_algorithms, default set in myproposals.h */
1.76 markus 1625: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1626: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1627: options->protocol = SSH_PROTO_2;
1.17 markus 1628: if (options->num_identity_files == 0) {
1.50 markus 1629: if (options->protocol & SSH_PROTO_1) {
1.195 dtucker 1630: add_identity_file(options, "~/",
1631: _PATH_SSH_CLIENT_IDENTITY, 0);
1.50 markus 1632: }
1633: if (options->protocol & SSH_PROTO_2) {
1.195 dtucker 1634: add_identity_file(options, "~/",
1635: _PATH_SSH_CLIENT_ID_RSA, 0);
1636: add_identity_file(options, "~/",
1637: _PATH_SSH_CLIENT_ID_DSA, 0);
1638: add_identity_file(options, "~/",
1639: _PATH_SSH_CLIENT_ID_ECDSA, 0);
1.215 markus 1640: add_identity_file(options, "~/",
1641: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.50 markus 1642: }
1.27 markus 1643: }
1.17 markus 1644: if (options->escape_char == -1)
1645: options->escape_char = '~';
1.193 djm 1646: if (options->num_system_hostfiles == 0) {
1647: options->system_hostfiles[options->num_system_hostfiles++] =
1648: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1649: options->system_hostfiles[options->num_system_hostfiles++] =
1650: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1651: }
1652: if (options->num_user_hostfiles == 0) {
1653: options->user_hostfiles[options->num_user_hostfiles++] =
1654: xstrdup(_PATH_SSH_USER_HOSTFILE);
1655: options->user_hostfiles[options->num_user_hostfiles++] =
1656: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1657: }
1.95 markus 1658: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1659: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1660: if (options->clear_forwardings == 1)
1661: clear_forwardings(options);
1.91 markus 1662: if (options->no_host_authentication_for_localhost == - 1)
1663: options->no_host_authentication_for_localhost = 0;
1.128 markus 1664: if (options->identities_only == -1)
1665: options->identities_only = 0;
1.101 markus 1666: if (options->enable_ssh_keysign == -1)
1667: options->enable_ssh_keysign = 0;
1.105 markus 1668: if (options->rekey_limit == -1)
1669: options->rekey_limit = 0;
1.198 dtucker 1670: if (options->rekey_interval == -1)
1671: options->rekey_interval = 0;
1.107 jakob 1672: if (options->verify_host_key_dns == -1)
1673: options->verify_host_key_dns = 0;
1.127 markus 1674: if (options->server_alive_interval == -1)
1675: options->server_alive_interval = 0;
1676: if (options->server_alive_count_max == -1)
1677: options->server_alive_count_max = 3;
1.132 djm 1678: if (options->control_master == -1)
1679: options->control_master = 0;
1.187 djm 1680: if (options->control_persist == -1) {
1681: options->control_persist = 0;
1682: options->control_persist_timeout = 0;
1683: }
1.136 djm 1684: if (options->hash_known_hosts == -1)
1685: options->hash_known_hosts = 0;
1.144 reyk 1686: if (options->tun_open == -1)
1.145 reyk 1687: options->tun_open = SSH_TUNMODE_NO;
1688: if (options->tun_local == -1)
1689: options->tun_local = SSH_TUNID_ANY;
1690: if (options->tun_remote == -1)
1691: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1692: if (options->permit_local_command == -1)
1693: options->permit_local_command = 0;
1.177 andreas 1694: if (options->use_roaming == -1)
1695: options->use_roaming = 1;
1.167 grunk 1696: if (options->visual_host_key == -1)
1697: options->visual_host_key = 0;
1.190 djm 1698: if (options->ip_qos_interactive == -1)
1699: options->ip_qos_interactive = IPTOS_LOWDELAY;
1700: if (options->ip_qos_bulk == -1)
1701: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1702: if (options->request_tty == -1)
1703: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 1704: if (options->proxy_use_fdpass == -1)
1705: options->proxy_use_fdpass = 0;
1.209 djm 1706: if (options->canonicalize_max_dots == -1)
1707: options->canonicalize_max_dots = 1;
1708: if (options->canonicalize_fallback_local == -1)
1709: options->canonicalize_fallback_local = 1;
1710: if (options->canonicalize_hostname == -1)
1711: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.207 djm 1712: #define CLEAR_ON_NONE(v) \
1713: do { \
1714: if (v != NULL && strcasecmp(v, "none") == 0) { \
1715: free(v); \
1716: v = NULL; \
1717: } \
1718: } while(0)
1719: CLEAR_ON_NONE(options->local_command);
1720: CLEAR_ON_NONE(options->proxy_command);
1721: CLEAR_ON_NONE(options->control_path);
1.17 markus 1722: /* options->user will be set in the main program if appropriate */
1723: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1724: /* options->host_key_alias should not be set by default */
1.67 markus 1725: /* options->preferred_authentications will be set in ssh */
1.135 djm 1726: }
1727:
1728: /*
1729: * parse_forward
1730: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 1731: * dynamicfwd == 0
1.135 djm 1732: * [listenhost:]listenport:connecthost:connectport
1.168 stevesk 1733: * dynamicfwd == 1
1734: * [listenhost:]listenport
1.135 djm 1735: * returns number of arguments parsed or zero on error
1736: */
1737: int
1.176 djm 1738: parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 1739: {
1740: int i;
1741: char *p, *cp, *fwdarg[4];
1742:
1743: memset(fwd, '\0', sizeof(*fwd));
1744:
1745: cp = p = xstrdup(fwdspec);
1746:
1747: /* skip leading spaces */
1.214 deraadt 1748: while (isspace((u_char)*cp))
1.135 djm 1749: cp++;
1750:
1751: for (i = 0; i < 4; ++i)
1752: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1753: break;
1754:
1.170 stevesk 1755: /* Check for trailing garbage */
1.135 djm 1756: if (cp != NULL)
1757: i = 0; /* failure */
1758:
1759: switch (i) {
1.168 stevesk 1760: case 1:
1761: fwd->listen_host = NULL;
1762: fwd->listen_port = a2port(fwdarg[0]);
1763: fwd->connect_host = xstrdup("socks");
1764: break;
1765:
1766: case 2:
1767: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1768: fwd->listen_port = a2port(fwdarg[1]);
1769: fwd->connect_host = xstrdup("socks");
1770: break;
1771:
1.135 djm 1772: case 3:
1773: fwd->listen_host = NULL;
1774: fwd->listen_port = a2port(fwdarg[0]);
1775: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1776: fwd->connect_port = a2port(fwdarg[2]);
1777: break;
1778:
1779: case 4:
1780: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1781: fwd->listen_port = a2port(fwdarg[1]);
1782: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1783: fwd->connect_port = a2port(fwdarg[3]);
1784: break;
1785: default:
1786: i = 0; /* failure */
1787: }
1788:
1.202 djm 1789: free(p);
1.135 djm 1790:
1.168 stevesk 1791: if (dynamicfwd) {
1792: if (!(i == 1 || i == 2))
1793: goto fail_free;
1794: } else {
1795: if (!(i == 3 || i == 4))
1796: goto fail_free;
1.175 djm 1797: if (fwd->connect_port <= 0)
1.168 stevesk 1798: goto fail_free;
1799: }
1800:
1.176 djm 1801: if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0))
1.135 djm 1802: goto fail_free;
1803:
1804: if (fwd->connect_host != NULL &&
1805: strlen(fwd->connect_host) >= NI_MAXHOST)
1806: goto fail_free;
1.176 djm 1807: if (fwd->listen_host != NULL &&
1808: strlen(fwd->listen_host) >= NI_MAXHOST)
1809: goto fail_free;
1810:
1.135 djm 1811:
1812: return (i);
1813:
1814: fail_free:
1.202 djm 1815: free(fwd->connect_host);
1816: fwd->connect_host = NULL;
1817: free(fwd->listen_host);
1818: fwd->listen_host = NULL;
1.135 djm 1819: return (0);
1.1 deraadt 1820: }
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