Annotation of src/usr.bin/ssh/readconf.c, Revision 1.212
1.212 ! djm 1: /* $OpenBSD: readconf.c,v 1.211 2013/10/23 03:03:07 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,
1.182 dtucker 140: oVisualHostKey, oUseRoaming, oZeroKnowledgePasswordAuthentication,
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 },
1.171 djm 247: #ifdef JPAKE
248: { "zeroknowledgepasswordauthentication",
249: oZeroKnowledgePasswordAuthentication },
250: #else
251: { "zeroknowledgepasswordauthentication", oUnsupported },
252: #endif
1.189 djm 253: { "kexalgorithms", oKexAlgorithms },
1.190 djm 254: { "ipqos", oIPQoS },
1.192 djm 255: { "requesttty", oRequestTTY },
1.205 djm 256: { "proxyusefdpass", oProxyUseFdpass },
1.208 djm 257: { "canonicaldomains", oCanonicalDomains },
1.209 djm 258: { "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
259: { "canonicalizehostname", oCanonicalizeHostname },
260: { "canonicalizemaxdots", oCanonicalizeMaxDots },
261: { "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
1.199 djm 262: { "ignoreunknown", oIgnoreUnknown },
1.171 djm 263:
1.92 stevesk 264: { NULL, oBadOption }
1.13 markus 265: };
266:
1.19 markus 267: /*
268: * Adds a local TCP/IP port forward to options. Never returns if there is an
269: * error.
270: */
1.1 deraadt 271:
1.26 markus 272: void
1.135 djm 273: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 274: {
1.17 markus 275: Forward *fwd;
276: extern uid_t original_real_uid;
1.185 djm 277:
1.135 djm 278: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 279: fatal("Privileged ports can only be forwarded by root.");
1.185 djm 280: options->local_forwards = xrealloc(options->local_forwards,
281: options->num_local_forwards + 1,
282: sizeof(*options->local_forwards));
1.17 markus 283: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 284:
1.172 stevesk 285: fwd->listen_host = newfwd->listen_host;
1.135 djm 286: fwd->listen_port = newfwd->listen_port;
1.172 stevesk 287: fwd->connect_host = newfwd->connect_host;
1.135 djm 288: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 289: }
290:
1.19 markus 291: /*
292: * Adds a remote TCP/IP port forward to options. Never returns if there is
293: * an error.
294: */
1.1 deraadt 295:
1.26 markus 296: void
1.135 djm 297: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 298: {
1.17 markus 299: Forward *fwd;
1.185 djm 300:
301: options->remote_forwards = xrealloc(options->remote_forwards,
302: options->num_remote_forwards + 1,
303: sizeof(*options->remote_forwards));
1.17 markus 304: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 305:
1.172 stevesk 306: fwd->listen_host = newfwd->listen_host;
1.135 djm 307: fwd->listen_port = newfwd->listen_port;
1.172 stevesk 308: fwd->connect_host = newfwd->connect_host;
1.135 djm 309: fwd->connect_port = newfwd->connect_port;
1.194 markus 310: fwd->handle = newfwd->handle;
1.184 markus 311: fwd->allocated_port = 0;
1.1 deraadt 312: }
313:
1.90 stevesk 314: static void
315: clear_forwardings(Options *options)
316: {
317: int i;
318:
1.135 djm 319: for (i = 0; i < options->num_local_forwards; i++) {
1.202 djm 320: free(options->local_forwards[i].listen_host);
321: free(options->local_forwards[i].connect_host);
1.135 djm 322: }
1.185 djm 323: if (options->num_local_forwards > 0) {
1.202 djm 324: free(options->local_forwards);
1.185 djm 325: options->local_forwards = NULL;
326: }
1.90 stevesk 327: options->num_local_forwards = 0;
1.135 djm 328: for (i = 0; i < options->num_remote_forwards; i++) {
1.202 djm 329: free(options->remote_forwards[i].listen_host);
330: free(options->remote_forwards[i].connect_host);
1.135 djm 331: }
1.185 djm 332: if (options->num_remote_forwards > 0) {
1.202 djm 333: free(options->remote_forwards);
1.185 djm 334: options->remote_forwards = NULL;
335: }
1.90 stevesk 336: options->num_remote_forwards = 0;
1.145 reyk 337: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 338: }
339:
1.195 dtucker 340: void
341: add_identity_file(Options *options, const char *dir, const char *filename,
342: int userprovided)
343: {
344: char *path;
345:
346: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
347: fatal("Too many identity files specified (max %d)",
348: SSH_MAX_IDENTITY_FILES);
349:
350: if (dir == NULL) /* no dir, filename is absolute */
351: path = xstrdup(filename);
352: else
353: (void)xasprintf(&path, "%.100s%.100s", dir, filename);
354:
355: options->identity_file_userprovided[options->num_identity_files] =
356: userprovided;
357: options->identity_files[options->num_identity_files++] = path;
358: }
359:
1.206 djm 360: int
361: default_ssh_port(void)
362: {
363: static int port;
364: struct servent *sp;
365:
366: if (port == 0) {
367: sp = getservbyname(SSH_SERVICE_NAME, "tcp");
368: port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
369: }
370: return port;
371: }
372:
373: /*
374: * Execute a command in a shell.
375: * Return its exit status or -1 on abnormal exit.
376: */
377: static int
378: execute_in_shell(const char *cmd)
379: {
380: char *shell, *command_string;
381: pid_t pid;
382: int devnull, status;
383: extern uid_t original_real_uid;
384:
385: if ((shell = getenv("SHELL")) == NULL)
386: shell = _PATH_BSHELL;
387:
388: /*
389: * Use "exec" to avoid "sh -c" processes on some platforms
390: * (e.g. Solaris)
391: */
392: xasprintf(&command_string, "exec %s", cmd);
393:
394: /* Need this to redirect subprocess stdin/out */
395: if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
396: fatal("open(/dev/null): %s", strerror(errno));
397:
398: debug("Executing command: '%.500s'", cmd);
399:
400: /* Fork and execute the command. */
401: if ((pid = fork()) == 0) {
402: char *argv[4];
403:
404: /* Child. Permanently give up superuser privileges. */
405: permanently_drop_suid(original_real_uid);
406:
407: /* Redirect child stdin and stdout. Leave stderr */
408: if (dup2(devnull, STDIN_FILENO) == -1)
409: fatal("dup2: %s", strerror(errno));
410: if (dup2(devnull, STDOUT_FILENO) == -1)
411: fatal("dup2: %s", strerror(errno));
412: if (devnull > STDERR_FILENO)
413: close(devnull);
414: closefrom(STDERR_FILENO + 1);
415:
416: argv[0] = shell;
417: argv[1] = "-c";
418: argv[2] = command_string;
419: argv[3] = NULL;
420:
421: execv(argv[0], argv);
422: error("Unable to execute '%.100s': %s", cmd, strerror(errno));
423: /* Die with signal to make this error apparent to parent. */
424: signal(SIGTERM, SIG_DFL);
425: kill(getpid(), SIGTERM);
426: _exit(1);
427: }
428: /* Parent. */
429: if (pid < 0)
430: fatal("%s: fork: %.100s", __func__, strerror(errno));
431:
432: close(devnull);
433: free(command_string);
434:
435: while (waitpid(pid, &status, 0) == -1) {
436: if (errno != EINTR && errno != EAGAIN)
437: fatal("%s: waitpid: %s", __func__, strerror(errno));
438: }
439: if (!WIFEXITED(status)) {
440: error("command '%.100s' exited abnormally", cmd);
441: return -1;
442: }
443: debug3("command returned status %d", WEXITSTATUS(status));
444: return WEXITSTATUS(status);
445: }
446:
447: /*
448: * Parse and execute a Match directive.
449: */
450: static int
451: match_cfg_line(Options *options, char **condition, struct passwd *pw,
452: const char *host_arg, const char *filename, int linenum)
453: {
1.211 djm 454: char *arg, *attrib, *cmd, *cp = *condition, *host;
455: const char *ruser;
1.206 djm 456: int r, port, result = 1;
457: size_t len;
458: char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
459:
460: /*
461: * Configuration is likely to be incomplete at this point so we
462: * must be prepared to use default values.
463: */
464: port = options->port <= 0 ? default_ssh_port() : options->port;
465: ruser = options->user == NULL ? pw->pw_name : options->user;
1.211 djm 466: if (options->hostname != NULL) {
1.212 ! djm 467: /* NB. Please keep in sync with ssh.c:main() */
1.211 djm 468: host = percent_expand(options->hostname,
469: "h", host_arg, (char *)NULL);
470: } else
471: host = xstrdup(host_arg);
1.206 djm 472:
473: debug3("checking match for '%s' host %s", cp, host);
474: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
475: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
476: error("Missing Match criteria for %s", attrib);
1.211 djm 477: result = -1;
478: goto out;
1.206 djm 479: }
480: len = strlen(arg);
481: if (strcasecmp(attrib, "host") == 0) {
482: if (match_hostname(host, arg, len) != 1)
483: result = 0;
484: else
485: debug("%.200s line %d: matched 'Host %.100s' ",
486: filename, linenum, host);
487: } else if (strcasecmp(attrib, "originalhost") == 0) {
488: if (match_hostname(host_arg, arg, len) != 1)
489: result = 0;
490: else
491: debug("%.200s line %d: matched "
492: "'OriginalHost %.100s' ",
493: filename, linenum, host_arg);
494: } else if (strcasecmp(attrib, "user") == 0) {
495: if (match_pattern_list(ruser, arg, len, 0) != 1)
496: result = 0;
497: else
498: debug("%.200s line %d: matched 'User %.100s' ",
499: filename, linenum, ruser);
500: } else if (strcasecmp(attrib, "localuser") == 0) {
501: if (match_pattern_list(pw->pw_name, arg, len, 0) != 1)
502: result = 0;
503: else
504: debug("%.200s line %d: matched "
505: "'LocalUser %.100s' ",
506: filename, linenum, pw->pw_name);
1.210 djm 507: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 508: if (gethostname(thishost, sizeof(thishost)) == -1)
509: fatal("gethostname: %s", strerror(errno));
510: strlcpy(shorthost, thishost, sizeof(shorthost));
511: shorthost[strcspn(thishost, ".")] = '\0';
512: snprintf(portstr, sizeof(portstr), "%d", port);
513:
514: cmd = percent_expand(arg,
515: "L", shorthost,
516: "d", pw->pw_dir,
517: "h", host,
518: "l", thishost,
519: "n", host_arg,
520: "p", portstr,
521: "r", ruser,
522: "u", pw->pw_name,
523: (char *)NULL);
524: r = execute_in_shell(cmd);
525: if (r == -1) {
1.210 djm 526: fatal("%.200s line %d: match exec '%.100s' "
1.206 djm 527: "error", filename, linenum, cmd);
528: } else if (r == 0) {
529: debug("%.200s line %d: matched "
1.210 djm 530: "'exec \"%.100s\"' ",
1.206 djm 531: filename, linenum, cmd);
532: } else
533: result = 0;
534: free(cmd);
535: } else {
536: error("Unsupported Match attribute %s", attrib);
1.211 djm 537: result = -1;
538: goto out;
1.206 djm 539: }
540: }
541: debug3("match %sfound", result ? "" : "not ");
542: *condition = cp;
1.211 djm 543: out:
544: free(host);
1.206 djm 545: return result;
546: }
547:
1.208 djm 548: /* Check and prepare a domain name: removes trailing '.' and lowercases */
549: static void
550: valid_domain(char *name, const char *filename, int linenum)
551: {
552: size_t i, l = strlen(name);
553: u_char c, last = '\0';
554:
555: if (l == 0)
556: fatal("%s line %d: empty hostname suffix", filename, linenum);
557: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
558: fatal("%s line %d: hostname suffix \"%.100s\" "
559: "starts with invalid character", filename, linenum, name);
560: for (i = 0; i < l; i++) {
561: c = tolower((u_char)name[i]);
562: name[i] = (char)c;
563: if (last == '.' && c == '.')
564: fatal("%s line %d: hostname suffix \"%.100s\" contains "
565: "consecutive separators", filename, linenum, name);
566: if (c != '.' && c != '-' && !isalnum(c) &&
567: c != '_') /* technically invalid, but common */
568: fatal("%s line %d: hostname suffix \"%.100s\" contains "
569: "invalid characters", filename, linenum, name);
570: last = c;
571: }
572: if (name[l - 1] == '.')
573: name[l - 1] = '\0';
574: }
575:
1.19 markus 576: /*
1.70 stevesk 577: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 578: */
1.26 markus 579: static OpCodes
1.199 djm 580: parse_token(const char *cp, const char *filename, int linenum,
581: const char *ignored_unknown)
1.1 deraadt 582: {
1.199 djm 583: int i;
1.1 deraadt 584:
1.17 markus 585: for (i = 0; keywords[i].name; i++)
1.199 djm 586: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 587: return keywords[i].opcode;
1.199 djm 588: if (ignored_unknown != NULL && match_pattern_list(cp, ignored_unknown,
589: strlen(ignored_unknown), 1) == 1)
590: return oIgnoredUnknownOption;
1.75 stevesk 591: error("%s: line %d: Bad configuration option: %s",
592: filename, linenum, cp);
1.17 markus 593: return oBadOption;
1.1 deraadt 594: }
595:
1.207 djm 596: /* Multistate option parsing */
597: struct multistate {
598: char *key;
599: int value;
600: };
601: static const struct multistate multistate_flag[] = {
602: { "true", 1 },
603: { "false", 0 },
604: { "yes", 1 },
605: { "no", 0 },
606: { NULL, -1 }
607: };
608: static const struct multistate multistate_yesnoask[] = {
609: { "true", 1 },
610: { "false", 0 },
611: { "yes", 1 },
612: { "no", 0 },
613: { "ask", 2 },
614: { NULL, -1 }
615: };
616: static const struct multistate multistate_addressfamily[] = {
617: { "inet", AF_INET },
618: { "inet6", AF_INET6 },
619: { "any", AF_UNSPEC },
620: { NULL, -1 }
621: };
622: static const struct multistate multistate_controlmaster[] = {
623: { "true", SSHCTL_MASTER_YES },
624: { "yes", SSHCTL_MASTER_YES },
625: { "false", SSHCTL_MASTER_NO },
626: { "no", SSHCTL_MASTER_NO },
627: { "auto", SSHCTL_MASTER_AUTO },
628: { "ask", SSHCTL_MASTER_ASK },
629: { "autoask", SSHCTL_MASTER_AUTO_ASK },
630: { NULL, -1 }
631: };
632: static const struct multistate multistate_tunnel[] = {
633: { "ethernet", SSH_TUNMODE_ETHERNET },
634: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
635: { "true", SSH_TUNMODE_DEFAULT },
636: { "yes", SSH_TUNMODE_DEFAULT },
637: { "false", SSH_TUNMODE_NO },
638: { "no", SSH_TUNMODE_NO },
639: { NULL, -1 }
640: };
641: static const struct multistate multistate_requesttty[] = {
642: { "true", REQUEST_TTY_YES },
643: { "yes", REQUEST_TTY_YES },
644: { "false", REQUEST_TTY_NO },
645: { "no", REQUEST_TTY_NO },
646: { "force", REQUEST_TTY_FORCE },
647: { "auto", REQUEST_TTY_AUTO },
648: { NULL, -1 }
649: };
1.209 djm 650: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 651: { "true", SSH_CANONICALISE_YES },
652: { "false", SSH_CANONICALISE_NO },
653: { "yes", SSH_CANONICALISE_YES },
654: { "no", SSH_CANONICALISE_NO },
655: { "always", SSH_CANONICALISE_ALWAYS },
656: { NULL, -1 }
657: };
1.207 djm 658:
1.19 markus 659: /*
660: * Processes a single option line as used in the configuration files. This
661: * only sets those values that have not already been set.
662: */
1.102 markus 663: #define WHITESPACE " \t\r\n"
1.14 markus 664: int
1.206 djm 665: process_config_line(Options *options, struct passwd *pw, const char *host,
666: char *line, const char *filename, int linenum, int *activep, int userconfig)
1.1 deraadt 667: {
1.193 djm 668: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
669: char **cpptr, fwdarg[256];
1.199 djm 670: u_int i, *uintptr, max_entries = 0;
1.206 djm 671: int negated, opcode, *intptr, value, value2, cmdline = 0;
1.164 dtucker 672: LogLevel *log_level_ptr;
1.201 dtucker 673: long long val64;
1.102 markus 674: size_t len;
1.135 djm 675: Forward fwd;
1.207 djm 676: const struct multistate *multistate_ptr;
1.208 djm 677: struct allowed_cname *cname;
1.106 djm 678:
1.206 djm 679: if (activep == NULL) { /* We are processing a command line directive */
680: cmdline = 1;
681: activep = &cmdline;
682: }
683:
1.106 djm 684: /* Strip trailing whitespace */
1.139 deraadt 685: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 686: if (strchr(WHITESPACE, line[len]) == NULL)
687: break;
688: line[len] = '\0';
689: }
1.1 deraadt 690:
1.42 provos 691: s = line;
692: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 693: if ((keyword = strdelim(&s)) == NULL)
694: return 0;
1.42 provos 695: /* Ignore leading whitespace. */
696: if (*keyword == '\0')
1.43 markus 697: keyword = strdelim(&s);
1.56 deraadt 698: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 699: return 0;
1.199 djm 700: /* Match lowercase keyword */
1.207 djm 701: lowercase(keyword);
1.17 markus 702:
1.199 djm 703: opcode = parse_token(keyword, filename, linenum,
704: options->ignored_unknown);
1.17 markus 705:
706: switch (opcode) {
707: case oBadOption:
1.19 markus 708: /* don't panic, but count bad options */
709: return -1;
1.17 markus 710: /* NOTREACHED */
1.199 djm 711: case oIgnoredUnknownOption:
712: debug("%s line %d: Ignored unknown option \"%s\"",
713: filename, linenum, keyword);
714: return 0;
1.111 djm 715: case oConnectTimeout:
716: intptr = &options->connection_timeout;
1.127 markus 717: parse_time:
1.111 djm 718: arg = strdelim(&s);
719: if (!arg || *arg == '\0')
720: fatal("%s line %d: missing time value.",
721: filename, linenum);
722: if ((value = convtime(arg)) == -1)
723: fatal("%s line %d: invalid time value.",
724: filename, linenum);
1.160 dtucker 725: if (*activep && *intptr == -1)
1.111 djm 726: *intptr = value;
727: break;
728:
1.17 markus 729: case oForwardAgent:
730: intptr = &options->forward_agent;
1.207 djm 731: parse_flag:
732: multistate_ptr = multistate_flag;
733: parse_multistate:
1.42 provos 734: arg = strdelim(&s);
1.40 ho 735: if (!arg || *arg == '\0')
1.207 djm 736: fatal("%s line %d: missing argument.",
737: filename, linenum);
738: value = -1;
739: for (i = 0; multistate_ptr[i].key != NULL; i++) {
740: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
741: value = multistate_ptr[i].value;
742: break;
743: }
744: }
745: if (value == -1)
746: fatal("%s line %d: unsupported option \"%s\".",
747: filename, linenum, arg);
1.17 markus 748: if (*activep && *intptr == -1)
749: *intptr = value;
750: break;
751:
752: case oForwardX11:
753: intptr = &options->forward_x11;
754: goto parse_flag;
755:
1.123 markus 756: case oForwardX11Trusted:
757: intptr = &options->forward_x11_trusted;
758: goto parse_flag;
1.186 djm 759:
760: case oForwardX11Timeout:
761: intptr = &options->forward_x11_timeout;
762: goto parse_time;
1.123 markus 763:
1.17 markus 764: case oGatewayPorts:
765: intptr = &options->gateway_ports;
766: goto parse_flag;
767:
1.153 markus 768: case oExitOnForwardFailure:
769: intptr = &options->exit_on_forward_failure;
770: goto parse_flag;
771:
1.17 markus 772: case oUsePrivilegedPort:
773: intptr = &options->use_privileged_port;
774: goto parse_flag;
775:
776: case oPasswordAuthentication:
777: intptr = &options->password_authentication;
778: goto parse_flag;
779:
1.171 djm 780: case oZeroKnowledgePasswordAuthentication:
781: intptr = &options->zero_knowledge_password_authentication;
782: goto parse_flag;
783:
1.48 markus 784: case oKbdInteractiveAuthentication:
785: intptr = &options->kbd_interactive_authentication;
786: goto parse_flag;
787:
788: case oKbdInteractiveDevices:
789: charptr = &options->kbd_interactive_devices;
790: goto parse_string;
791:
1.50 markus 792: case oPubkeyAuthentication:
793: intptr = &options->pubkey_authentication;
1.30 markus 794: goto parse_flag;
795:
1.17 markus 796: case oRSAAuthentication:
797: intptr = &options->rsa_authentication;
798: goto parse_flag;
799:
800: case oRhostsRSAAuthentication:
801: intptr = &options->rhosts_rsa_authentication;
802: goto parse_flag;
803:
1.72 markus 804: case oHostbasedAuthentication:
805: intptr = &options->hostbased_authentication;
806: goto parse_flag;
807:
1.59 markus 808: case oChallengeResponseAuthentication:
1.78 markus 809: intptr = &options->challenge_response_authentication;
1.17 markus 810: goto parse_flag;
1.108 jakob 811:
1.118 markus 812: case oGssAuthentication:
813: intptr = &options->gss_authentication;
814: goto parse_flag;
815:
816: case oGssDelegateCreds:
817: intptr = &options->gss_deleg_creds;
818: goto parse_flag;
819:
1.17 markus 820: case oBatchMode:
821: intptr = &options->batch_mode;
822: goto parse_flag;
823:
824: case oCheckHostIP:
825: intptr = &options->check_host_ip;
1.167 grunk 826: goto parse_flag;
1.17 markus 827:
1.107 jakob 828: case oVerifyHostKeyDNS:
829: intptr = &options->verify_host_key_dns;
1.207 djm 830: multistate_ptr = multistate_yesnoask;
831: goto parse_multistate;
1.107 jakob 832:
1.17 markus 833: case oStrictHostKeyChecking:
834: intptr = &options->strict_host_key_checking;
1.207 djm 835: multistate_ptr = multistate_yesnoask;
836: goto parse_multistate;
1.17 markus 837:
838: case oCompression:
839: intptr = &options->compression;
840: goto parse_flag;
841:
1.126 markus 842: case oTCPKeepAlive:
843: intptr = &options->tcp_keep_alive;
1.17 markus 844: goto parse_flag;
845:
1.91 markus 846: case oNoHostAuthenticationForLocalhost:
847: intptr = &options->no_host_authentication_for_localhost;
848: goto parse_flag;
849:
1.17 markus 850: case oNumberOfPasswordPrompts:
851: intptr = &options->number_of_password_prompts;
852: goto parse_int;
853:
854: case oCompressionLevel:
855: intptr = &options->compression_level;
856: goto parse_int;
857:
1.105 markus 858: case oRekeyLimit:
859: arg = strdelim(&s);
860: if (!arg || *arg == '\0')
1.198 dtucker 861: fatal("%.200s line %d: Missing argument.", filename,
862: linenum);
863: if (strcmp(arg, "default") == 0) {
864: val64 = 0;
865: } else {
1.200 dtucker 866: if (scan_scaled(arg, &val64) == -1)
867: fatal("%.200s line %d: Bad number '%s': %s",
868: filename, linenum, arg, strerror(errno));
869: /* check for too-large or too-small limits */
870: if (val64 > UINT_MAX)
1.198 dtucker 871: fatal("%.200s line %d: RekeyLimit too large",
872: filename, linenum);
873: if (val64 != 0 && val64 < 16)
874: fatal("%.200s line %d: RekeyLimit too small",
875: filename, linenum);
1.105 markus 876: }
1.165 djm 877: if (*activep && options->rekey_limit == -1)
878: options->rekey_limit = (u_int32_t)val64;
1.198 dtucker 879: if (s != NULL) { /* optional rekey interval present */
880: if (strcmp(s, "none") == 0) {
881: (void)strdelim(&s); /* discard */
882: break;
883: }
884: intptr = &options->rekey_interval;
885: goto parse_time;
886: }
1.105 markus 887: break;
888:
1.17 markus 889: case oIdentityFile:
1.42 provos 890: arg = strdelim(&s);
1.40 ho 891: if (!arg || *arg == '\0')
1.17 markus 892: fatal("%.200s line %d: Missing argument.", filename, linenum);
893: if (*activep) {
1.50 markus 894: intptr = &options->num_identity_files;
1.27 markus 895: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 896: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 897: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.196 dtucker 898: add_identity_file(options, NULL, arg, userconfig);
1.17 markus 899: }
900: break;
901:
1.34 markus 902: case oXAuthLocation:
903: charptr=&options->xauth_location;
904: goto parse_string;
905:
1.17 markus 906: case oUser:
907: charptr = &options->user;
908: parse_string:
1.42 provos 909: arg = strdelim(&s);
1.40 ho 910: if (!arg || *arg == '\0')
1.193 djm 911: fatal("%.200s line %d: Missing argument.",
912: filename, linenum);
1.17 markus 913: if (*activep && *charptr == NULL)
1.38 provos 914: *charptr = xstrdup(arg);
1.17 markus 915: break;
916:
917: case oGlobalKnownHostsFile:
1.193 djm 918: cpptr = (char **)&options->system_hostfiles;
919: uintptr = &options->num_system_hostfiles;
920: max_entries = SSH_MAX_HOSTS_FILES;
921: parse_char_array:
922: if (*activep && *uintptr == 0) {
923: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
924: if ((*uintptr) >= max_entries)
925: fatal("%s line %d: "
926: "too many authorized keys files.",
927: filename, linenum);
928: cpptr[(*uintptr)++] = xstrdup(arg);
929: }
930: }
931: return 0;
1.17 markus 932:
933: case oUserKnownHostsFile:
1.193 djm 934: cpptr = (char **)&options->user_hostfiles;
935: uintptr = &options->num_user_hostfiles;
936: max_entries = SSH_MAX_HOSTS_FILES;
937: goto parse_char_array;
1.27 markus 938:
1.17 markus 939: case oHostName:
940: charptr = &options->hostname;
941: goto parse_string;
942:
1.52 markus 943: case oHostKeyAlias:
944: charptr = &options->host_key_alias;
945: goto parse_string;
946:
1.67 markus 947: case oPreferredAuthentications:
948: charptr = &options->preferred_authentications;
949: goto parse_string;
950:
1.77 markus 951: case oBindAddress:
952: charptr = &options->bind_address;
953: goto parse_string;
954:
1.183 markus 955: case oPKCS11Provider:
956: charptr = &options->pkcs11_provider;
1.86 markus 957: goto parse_string;
1.85 jakob 958:
1.17 markus 959: case oProxyCommand:
1.144 reyk 960: charptr = &options->proxy_command;
961: parse_command:
1.113 markus 962: if (s == NULL)
963: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 964: len = strspn(s, WHITESPACE "=");
1.17 markus 965: if (*activep && *charptr == NULL)
1.102 markus 966: *charptr = xstrdup(s + len);
1.17 markus 967: return 0;
968:
969: case oPort:
970: intptr = &options->port;
971: parse_int:
1.42 provos 972: arg = strdelim(&s);
1.40 ho 973: if (!arg || *arg == '\0')
1.17 markus 974: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 975: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 976: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 977:
978: /* Octal, decimal, or hex format? */
1.38 provos 979: value = strtol(arg, &endofnumber, 0);
980: if (arg == endofnumber)
1.21 markus 981: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 982: if (*activep && *intptr == -1)
983: *intptr = value;
984: break;
985:
986: case oConnectionAttempts:
987: intptr = &options->connection_attempts;
988: goto parse_int;
989:
990: case oCipher:
991: intptr = &options->cipher;
1.42 provos 992: arg = strdelim(&s);
1.40 ho 993: if (!arg || *arg == '\0')
1.32 markus 994: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 995: value = cipher_number(arg);
1.17 markus 996: if (value == -1)
997: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 998: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 999: if (*activep && *intptr == -1)
1000: *intptr = value;
1001: break;
1002:
1.25 markus 1003: case oCiphers:
1.42 provos 1004: arg = strdelim(&s);
1.40 ho 1005: if (!arg || *arg == '\0')
1.32 markus 1006: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1007: if (!ciphers_valid(arg))
1.31 markus 1008: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1009: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1010: if (*activep && options->ciphers == NULL)
1.38 provos 1011: options->ciphers = xstrdup(arg);
1.25 markus 1012: break;
1013:
1.62 markus 1014: case oMacs:
1015: arg = strdelim(&s);
1016: if (!arg || *arg == '\0')
1017: fatal("%.200s line %d: Missing argument.", filename, linenum);
1018: if (!mac_valid(arg))
1019: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1020: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1021: if (*activep && options->macs == NULL)
1022: options->macs = xstrdup(arg);
1023: break;
1024:
1.189 djm 1025: case oKexAlgorithms:
1026: arg = strdelim(&s);
1027: if (!arg || *arg == '\0')
1028: fatal("%.200s line %d: Missing argument.",
1029: filename, linenum);
1030: if (!kex_names_valid(arg))
1031: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1032: filename, linenum, arg ? arg : "<NONE>");
1033: if (*activep && options->kex_algorithms == NULL)
1034: options->kex_algorithms = xstrdup(arg);
1035: break;
1036:
1.76 markus 1037: case oHostKeyAlgorithms:
1038: arg = strdelim(&s);
1039: if (!arg || *arg == '\0')
1040: fatal("%.200s line %d: Missing argument.", filename, linenum);
1041: if (!key_names_valid2(arg))
1042: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 1043: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 1044: if (*activep && options->hostkeyalgorithms == NULL)
1045: options->hostkeyalgorithms = xstrdup(arg);
1046: break;
1047:
1.25 markus 1048: case oProtocol:
1049: intptr = &options->protocol;
1.42 provos 1050: arg = strdelim(&s);
1.40 ho 1051: if (!arg || *arg == '\0')
1.32 markus 1052: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1053: value = proto_spec(arg);
1.25 markus 1054: if (value == SSH_PROTO_UNKNOWN)
1055: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 1056: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1057: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
1058: *intptr = value;
1059: break;
1060:
1.17 markus 1061: case oLogLevel:
1.164 dtucker 1062: log_level_ptr = &options->log_level;
1.42 provos 1063: arg = strdelim(&s);
1.38 provos 1064: value = log_level_number(arg);
1.95 markus 1065: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1066: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1067: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1068: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1069: *log_level_ptr = (LogLevel) value;
1.17 markus 1070: break;
1071:
1.88 stevesk 1072: case oLocalForward:
1.17 markus 1073: case oRemoteForward:
1.168 stevesk 1074: case oDynamicForward:
1.42 provos 1075: arg = strdelim(&s);
1.135 djm 1076: if (arg == NULL || *arg == '\0')
1.88 stevesk 1077: fatal("%.200s line %d: Missing port argument.",
1078: filename, linenum);
1.135 djm 1079:
1.168 stevesk 1080: if (opcode == oLocalForward ||
1081: opcode == oRemoteForward) {
1082: arg2 = strdelim(&s);
1083: if (arg2 == NULL || *arg2 == '\0')
1084: fatal("%.200s line %d: Missing target argument.",
1085: filename, linenum);
1.135 djm 1086:
1.168 stevesk 1087: /* construct a string for parse_forward */
1088: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1089: } else if (opcode == oDynamicForward) {
1090: strlcpy(fwdarg, arg, sizeof(fwdarg));
1091: }
1092:
1093: if (parse_forward(&fwd, fwdarg,
1.176 djm 1094: opcode == oDynamicForward ? 1 : 0,
1095: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1096: fatal("%.200s line %d: Bad forwarding specification.",
1097: filename, linenum);
1.135 djm 1098:
1.88 stevesk 1099: if (*activep) {
1.168 stevesk 1100: if (opcode == oLocalForward ||
1101: opcode == oDynamicForward)
1.135 djm 1102: add_local_forward(options, &fwd);
1.88 stevesk 1103: else if (opcode == oRemoteForward)
1.135 djm 1104: add_remote_forward(options, &fwd);
1.88 stevesk 1105: }
1.17 markus 1106: break;
1.71 markus 1107:
1.90 stevesk 1108: case oClearAllForwardings:
1109: intptr = &options->clear_forwardings;
1110: goto parse_flag;
1111:
1.17 markus 1112: case oHost:
1.206 djm 1113: if (cmdline)
1114: fatal("Host directive not supported as a command-line "
1115: "option");
1.17 markus 1116: *activep = 0;
1.191 djm 1117: arg2 = NULL;
1118: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1119: negated = *arg == '!';
1120: if (negated)
1121: arg++;
1.38 provos 1122: if (match_pattern(host, arg)) {
1.191 djm 1123: if (negated) {
1124: debug("%.200s line %d: Skipping Host "
1125: "block because of negated match "
1126: "for %.100s", filename, linenum,
1127: arg);
1128: *activep = 0;
1129: break;
1130: }
1131: if (!*activep)
1132: arg2 = arg; /* logged below */
1.17 markus 1133: *activep = 1;
1134: }
1.191 djm 1135: }
1136: if (*activep)
1137: debug("%.200s line %d: Applying options for %.100s",
1138: filename, linenum, arg2);
1.42 provos 1139: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1140: return 0;
1141:
1.206 djm 1142: case oMatch:
1143: if (cmdline)
1144: fatal("Host directive not supported as a command-line "
1145: "option");
1146: value = match_cfg_line(options, &s, pw, host,
1147: filename, linenum);
1148: if (value < 0)
1149: fatal("%.200s line %d: Bad Match condition", filename,
1150: linenum);
1151: *activep = value;
1152: break;
1153:
1.17 markus 1154: case oEscapeChar:
1155: intptr = &options->escape_char;
1.42 provos 1156: arg = strdelim(&s);
1.40 ho 1157: if (!arg || *arg == '\0')
1.17 markus 1158: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1159: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1160: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1161: value = (u_char) arg[1] & 31;
1.38 provos 1162: else if (strlen(arg) == 1)
1.51 markus 1163: value = (u_char) arg[0];
1.38 provos 1164: else if (strcmp(arg, "none") == 0)
1.79 stevesk 1165: value = SSH_ESCAPECHAR_NONE;
1.17 markus 1166: else {
1167: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1168: filename, linenum);
1.17 markus 1169: /* NOTREACHED */
1170: value = 0; /* Avoid compiler warning. */
1171: }
1172: if (*activep && *intptr == -1)
1173: *intptr = value;
1.112 djm 1174: break;
1175:
1176: case oAddressFamily:
1.114 djm 1177: intptr = &options->address_family;
1.207 djm 1178: multistate_ptr = multistate_addressfamily;
1179: goto parse_multistate;
1.17 markus 1180:
1.101 markus 1181: case oEnableSSHKeysign:
1182: intptr = &options->enable_ssh_keysign;
1183: goto parse_flag;
1184:
1.128 markus 1185: case oIdentitiesOnly:
1186: intptr = &options->identities_only;
1187: goto parse_flag;
1188:
1.127 markus 1189: case oServerAliveInterval:
1190: intptr = &options->server_alive_interval;
1191: goto parse_time;
1192:
1193: case oServerAliveCountMax:
1194: intptr = &options->server_alive_count_max;
1195: goto parse_int;
1196:
1.130 djm 1197: case oSendEnv:
1198: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1199: if (strchr(arg, '=') != NULL)
1200: fatal("%s line %d: Invalid environment name.",
1201: filename, linenum);
1.137 djm 1202: if (!*activep)
1203: continue;
1.130 djm 1204: if (options->num_send_env >= MAX_SEND_ENV)
1205: fatal("%s line %d: too many send env.",
1206: filename, linenum);
1207: options->send_env[options->num_send_env++] =
1208: xstrdup(arg);
1209: }
1210: break;
1211:
1.132 djm 1212: case oControlPath:
1213: charptr = &options->control_path;
1214: goto parse_string;
1215:
1216: case oControlMaster:
1217: intptr = &options->control_master;
1.207 djm 1218: multistate_ptr = multistate_controlmaster;
1219: goto parse_multistate;
1.132 djm 1220:
1.187 djm 1221: case oControlPersist:
1222: /* no/false/yes/true, or a time spec */
1223: intptr = &options->control_persist;
1224: arg = strdelim(&s);
1225: if (!arg || *arg == '\0')
1226: fatal("%.200s line %d: Missing ControlPersist"
1227: " argument.", filename, linenum);
1228: value = 0;
1229: value2 = 0; /* timeout */
1230: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1231: value = 0;
1232: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1233: value = 1;
1234: else if ((value2 = convtime(arg)) >= 0)
1235: value = 1;
1236: else
1237: fatal("%.200s line %d: Bad ControlPersist argument.",
1238: filename, linenum);
1239: if (*activep && *intptr == -1) {
1240: *intptr = value;
1241: options->control_persist_timeout = value2;
1242: }
1243: break;
1244:
1.136 djm 1245: case oHashKnownHosts:
1246: intptr = &options->hash_known_hosts;
1247: goto parse_flag;
1248:
1.144 reyk 1249: case oTunnel:
1250: intptr = &options->tun_open;
1.207 djm 1251: multistate_ptr = multistate_tunnel;
1252: goto parse_multistate;
1.144 reyk 1253:
1254: case oTunnelDevice:
1255: arg = strdelim(&s);
1256: if (!arg || *arg == '\0')
1257: fatal("%.200s line %d: Missing argument.", filename, linenum);
1258: value = a2tun(arg, &value2);
1.145 reyk 1259: if (value == SSH_TUNID_ERR)
1.144 reyk 1260: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1261: if (*activep) {
1262: options->tun_local = value;
1263: options->tun_remote = value2;
1264: }
1265: break;
1266:
1267: case oLocalCommand:
1268: charptr = &options->local_command;
1269: goto parse_command;
1270:
1271: case oPermitLocalCommand:
1272: intptr = &options->permit_local_command;
1273: goto parse_flag;
1274:
1.167 grunk 1275: case oVisualHostKey:
1276: intptr = &options->visual_host_key;
1277: goto parse_flag;
1278:
1.190 djm 1279: case oIPQoS:
1280: arg = strdelim(&s);
1281: if ((value = parse_ipqos(arg)) == -1)
1282: fatal("%s line %d: Bad IPQoS value: %s",
1283: filename, linenum, arg);
1284: arg = strdelim(&s);
1285: if (arg == NULL)
1286: value2 = value;
1287: else if ((value2 = parse_ipqos(arg)) == -1)
1288: fatal("%s line %d: Bad IPQoS value: %s",
1289: filename, linenum, arg);
1290: if (*activep) {
1291: options->ip_qos_interactive = value;
1292: options->ip_qos_bulk = value2;
1293: }
1294: break;
1295:
1.177 andreas 1296: case oUseRoaming:
1297: intptr = &options->use_roaming;
1298: goto parse_flag;
1299:
1.192 djm 1300: case oRequestTTY:
1301: intptr = &options->request_tty;
1.207 djm 1302: multistate_ptr = multistate_requesttty;
1303: goto parse_multistate;
1.192 djm 1304:
1.199 djm 1305: case oIgnoreUnknown:
1306: charptr = &options->ignored_unknown;
1307: goto parse_string;
1308:
1.205 djm 1309: case oProxyUseFdpass:
1310: intptr = &options->proxy_use_fdpass;
1311: goto parse_flag;
1312:
1.208 djm 1313: case oCanonicalDomains:
1314: value = options->num_canonical_domains != 0;
1315: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1316: valid_domain(arg, filename, linenum);
1317: if (!*activep || value)
1318: continue;
1319: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1320: fatal("%s line %d: too many hostname suffixes.",
1321: filename, linenum);
1322: options->canonical_domains[
1323: options->num_canonical_domains++] = xstrdup(arg);
1324: }
1325: break;
1326:
1.209 djm 1327: case oCanonicalizePermittedCNAMEs:
1.208 djm 1328: value = options->num_permitted_cnames != 0;
1329: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1330: /* Either '*' for everything or 'list:list' */
1331: if (strcmp(arg, "*") == 0)
1332: arg2 = arg;
1333: else {
1334: lowercase(arg);
1335: if ((arg2 = strchr(arg, ':')) == NULL ||
1336: arg2[1] == '\0') {
1337: fatal("%s line %d: "
1338: "Invalid permitted CNAME \"%s\"",
1339: filename, linenum, arg);
1340: }
1341: *arg2 = '\0';
1342: arg2++;
1343: }
1344: if (!*activep || value)
1345: continue;
1346: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1347: fatal("%s line %d: too many permitted CNAMEs.",
1348: filename, linenum);
1349: cname = options->permitted_cnames +
1350: options->num_permitted_cnames++;
1351: cname->source_list = xstrdup(arg);
1352: cname->target_list = xstrdup(arg2);
1353: }
1354: break;
1355:
1.209 djm 1356: case oCanonicalizeHostname:
1357: intptr = &options->canonicalize_hostname;
1358: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1359: goto parse_multistate;
1360:
1.209 djm 1361: case oCanonicalizeMaxDots:
1362: intptr = &options->canonicalize_max_dots;
1.208 djm 1363: goto parse_int;
1364:
1.209 djm 1365: case oCanonicalizeFallbackLocal:
1366: intptr = &options->canonicalize_fallback_local;
1.208 djm 1367: goto parse_flag;
1368:
1.96 markus 1369: case oDeprecated:
1.98 markus 1370: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1371: filename, linenum, keyword);
1.98 markus 1372: return 0;
1.96 markus 1373:
1.110 jakob 1374: case oUnsupported:
1375: error("%s line %d: Unsupported option \"%s\"",
1376: filename, linenum, keyword);
1377: return 0;
1378:
1.17 markus 1379: default:
1380: fatal("process_config_line: Unimplemented opcode %d", opcode);
1381: }
1382:
1383: /* Check that there is no garbage at end of line. */
1.57 djm 1384: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1385: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1386: filename, linenum, arg);
1.39 ho 1387: }
1.17 markus 1388: return 0;
1.1 deraadt 1389: }
1390:
1391:
1.19 markus 1392: /*
1393: * Reads the config file and modifies the options accordingly. Options
1394: * should already be initialized before this call. This never returns if
1.89 stevesk 1395: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1396: */
1.1 deraadt 1397:
1.89 stevesk 1398: int
1.206 djm 1399: read_config_file(const char *filename, struct passwd *pw, const char *host,
1400: Options *options, int flags)
1.1 deraadt 1401: {
1.17 markus 1402: FILE *f;
1403: char line[1024];
1404: int active, linenum;
1405: int bad_options = 0;
1406:
1.129 djm 1407: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1408: return 0;
1.129 djm 1409:
1.196 dtucker 1410: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1411: struct stat sb;
1.134 deraadt 1412:
1.131 dtucker 1413: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1414: fatal("fstat %s: %s", filename, strerror(errno));
1415: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1416: (sb.st_mode & 022) != 0))
1.129 djm 1417: fatal("Bad owner or permissions on %s", filename);
1418: }
1.17 markus 1419:
1420: debug("Reading configuration data %.200s", filename);
1421:
1.19 markus 1422: /*
1423: * Mark that we are now processing the options. This flag is turned
1424: * on/off by Host specifications.
1425: */
1.17 markus 1426: active = 1;
1427: linenum = 0;
1428: while (fgets(line, sizeof(line), f)) {
1429: /* Update line number counter. */
1430: linenum++;
1.206 djm 1431: if (process_config_line(options, pw, host, line, filename,
1432: linenum, &active, flags & SSHCONF_USERCONF) != 0)
1.17 markus 1433: bad_options++;
1434: }
1435: fclose(f);
1436: if (bad_options > 0)
1.64 millert 1437: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1438: filename, bad_options);
1.89 stevesk 1439: return 1;
1.1 deraadt 1440: }
1441:
1.19 markus 1442: /*
1443: * Initializes options to special values that indicate that they have not yet
1444: * been set. Read_config_file will only set options with this value. Options
1445: * are processed in the following order: command line, user config file,
1446: * system config file. Last, fill_default_options is called.
1447: */
1.1 deraadt 1448:
1.26 markus 1449: void
1.17 markus 1450: initialize_options(Options * options)
1.1 deraadt 1451: {
1.17 markus 1452: memset(options, 'X', sizeof(*options));
1453: options->forward_agent = -1;
1454: options->forward_x11 = -1;
1.123 markus 1455: options->forward_x11_trusted = -1;
1.186 djm 1456: options->forward_x11_timeout = -1;
1.153 markus 1457: options->exit_on_forward_failure = -1;
1.34 markus 1458: options->xauth_location = NULL;
1.17 markus 1459: options->gateway_ports = -1;
1460: options->use_privileged_port = -1;
1461: options->rsa_authentication = -1;
1.50 markus 1462: options->pubkey_authentication = -1;
1.78 markus 1463: options->challenge_response_authentication = -1;
1.118 markus 1464: options->gss_authentication = -1;
1465: options->gss_deleg_creds = -1;
1.17 markus 1466: options->password_authentication = -1;
1.48 markus 1467: options->kbd_interactive_authentication = -1;
1468: options->kbd_interactive_devices = NULL;
1.17 markus 1469: options->rhosts_rsa_authentication = -1;
1.72 markus 1470: options->hostbased_authentication = -1;
1.17 markus 1471: options->batch_mode = -1;
1472: options->check_host_ip = -1;
1473: options->strict_host_key_checking = -1;
1474: options->compression = -1;
1.126 markus 1475: options->tcp_keep_alive = -1;
1.17 markus 1476: options->compression_level = -1;
1477: options->port = -1;
1.114 djm 1478: options->address_family = -1;
1.17 markus 1479: options->connection_attempts = -1;
1.111 djm 1480: options->connection_timeout = -1;
1.17 markus 1481: options->number_of_password_prompts = -1;
1482: options->cipher = -1;
1.25 markus 1483: options->ciphers = NULL;
1.62 markus 1484: options->macs = NULL;
1.189 djm 1485: options->kex_algorithms = NULL;
1.76 markus 1486: options->hostkeyalgorithms = NULL;
1.25 markus 1487: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1488: options->num_identity_files = 0;
1489: options->hostname = NULL;
1.52 markus 1490: options->host_key_alias = NULL;
1.17 markus 1491: options->proxy_command = NULL;
1492: options->user = NULL;
1493: options->escape_char = -1;
1.193 djm 1494: options->num_system_hostfiles = 0;
1495: options->num_user_hostfiles = 0;
1.185 djm 1496: options->local_forwards = NULL;
1.17 markus 1497: options->num_local_forwards = 0;
1.185 djm 1498: options->remote_forwards = NULL;
1.17 markus 1499: options->num_remote_forwards = 0;
1.90 stevesk 1500: options->clear_forwardings = -1;
1.95 markus 1501: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1502: options->preferred_authentications = NULL;
1.77 markus 1503: options->bind_address = NULL;
1.183 markus 1504: options->pkcs11_provider = NULL;
1.101 markus 1505: options->enable_ssh_keysign = - 1;
1.91 markus 1506: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1507: options->identities_only = - 1;
1.105 markus 1508: options->rekey_limit = - 1;
1.198 dtucker 1509: options->rekey_interval = -1;
1.107 jakob 1510: options->verify_host_key_dns = -1;
1.127 markus 1511: options->server_alive_interval = -1;
1512: options->server_alive_count_max = -1;
1.130 djm 1513: options->num_send_env = 0;
1.132 djm 1514: options->control_path = NULL;
1515: options->control_master = -1;
1.187 djm 1516: options->control_persist = -1;
1517: options->control_persist_timeout = 0;
1.136 djm 1518: options->hash_known_hosts = -1;
1.144 reyk 1519: options->tun_open = -1;
1520: options->tun_local = -1;
1521: options->tun_remote = -1;
1522: options->local_command = NULL;
1523: options->permit_local_command = -1;
1.177 andreas 1524: options->use_roaming = -1;
1.167 grunk 1525: options->visual_host_key = -1;
1.171 djm 1526: options->zero_knowledge_password_authentication = -1;
1.190 djm 1527: options->ip_qos_interactive = -1;
1528: options->ip_qos_bulk = -1;
1.192 djm 1529: options->request_tty = -1;
1.205 djm 1530: options->proxy_use_fdpass = -1;
1.199 djm 1531: options->ignored_unknown = NULL;
1.208 djm 1532: options->num_canonical_domains = 0;
1533: options->num_permitted_cnames = 0;
1.209 djm 1534: options->canonicalize_max_dots = -1;
1535: options->canonicalize_fallback_local = -1;
1536: options->canonicalize_hostname = -1;
1.1 deraadt 1537: }
1538:
1.19 markus 1539: /*
1540: * Called after processing other sources of option data, this fills those
1541: * options for which no value has been specified with their default values.
1542: */
1.1 deraadt 1543:
1.26 markus 1544: void
1.17 markus 1545: fill_default_options(Options * options)
1.1 deraadt 1546: {
1.17 markus 1547: if (options->forward_agent == -1)
1.33 markus 1548: options->forward_agent = 0;
1.17 markus 1549: if (options->forward_x11 == -1)
1.23 markus 1550: options->forward_x11 = 0;
1.123 markus 1551: if (options->forward_x11_trusted == -1)
1552: options->forward_x11_trusted = 0;
1.186 djm 1553: if (options->forward_x11_timeout == -1)
1554: options->forward_x11_timeout = 1200;
1.153 markus 1555: if (options->exit_on_forward_failure == -1)
1556: options->exit_on_forward_failure = 0;
1.34 markus 1557: if (options->xauth_location == NULL)
1.80 markus 1558: options->xauth_location = _PATH_XAUTH;
1.17 markus 1559: if (options->gateway_ports == -1)
1560: options->gateway_ports = 0;
1561: if (options->use_privileged_port == -1)
1.65 markus 1562: options->use_privileged_port = 0;
1.17 markus 1563: if (options->rsa_authentication == -1)
1564: options->rsa_authentication = 1;
1.50 markus 1565: if (options->pubkey_authentication == -1)
1566: options->pubkey_authentication = 1;
1.78 markus 1567: if (options->challenge_response_authentication == -1)
1.83 markus 1568: options->challenge_response_authentication = 1;
1.118 markus 1569: if (options->gss_authentication == -1)
1.122 markus 1570: options->gss_authentication = 0;
1.118 markus 1571: if (options->gss_deleg_creds == -1)
1572: options->gss_deleg_creds = 0;
1.17 markus 1573: if (options->password_authentication == -1)
1574: options->password_authentication = 1;
1.48 markus 1575: if (options->kbd_interactive_authentication == -1)
1.59 markus 1576: options->kbd_interactive_authentication = 1;
1.17 markus 1577: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1578: options->rhosts_rsa_authentication = 0;
1.72 markus 1579: if (options->hostbased_authentication == -1)
1580: options->hostbased_authentication = 0;
1.17 markus 1581: if (options->batch_mode == -1)
1582: options->batch_mode = 0;
1583: if (options->check_host_ip == -1)
1584: options->check_host_ip = 1;
1585: if (options->strict_host_key_checking == -1)
1586: options->strict_host_key_checking = 2; /* 2 is default */
1587: if (options->compression == -1)
1588: options->compression = 0;
1.126 markus 1589: if (options->tcp_keep_alive == -1)
1590: options->tcp_keep_alive = 1;
1.17 markus 1591: if (options->compression_level == -1)
1592: options->compression_level = 6;
1593: if (options->port == -1)
1594: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1595: if (options->address_family == -1)
1596: options->address_family = AF_UNSPEC;
1.17 markus 1597: if (options->connection_attempts == -1)
1.84 markus 1598: options->connection_attempts = 1;
1.17 markus 1599: if (options->number_of_password_prompts == -1)
1600: options->number_of_password_prompts = 3;
1601: /* Selected in ssh_login(). */
1602: if (options->cipher == -1)
1603: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1604: /* options->ciphers, default set in myproposals.h */
1.62 markus 1605: /* options->macs, default set in myproposals.h */
1.189 djm 1606: /* options->kex_algorithms, default set in myproposals.h */
1.76 markus 1607: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1608: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1609: options->protocol = SSH_PROTO_2;
1.17 markus 1610: if (options->num_identity_files == 0) {
1.50 markus 1611: if (options->protocol & SSH_PROTO_1) {
1.195 dtucker 1612: add_identity_file(options, "~/",
1613: _PATH_SSH_CLIENT_IDENTITY, 0);
1.50 markus 1614: }
1615: if (options->protocol & SSH_PROTO_2) {
1.195 dtucker 1616: add_identity_file(options, "~/",
1617: _PATH_SSH_CLIENT_ID_RSA, 0);
1618: add_identity_file(options, "~/",
1619: _PATH_SSH_CLIENT_ID_DSA, 0);
1620: add_identity_file(options, "~/",
1621: _PATH_SSH_CLIENT_ID_ECDSA, 0);
1.50 markus 1622: }
1.27 markus 1623: }
1.17 markus 1624: if (options->escape_char == -1)
1625: options->escape_char = '~';
1.193 djm 1626: if (options->num_system_hostfiles == 0) {
1627: options->system_hostfiles[options->num_system_hostfiles++] =
1628: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1629: options->system_hostfiles[options->num_system_hostfiles++] =
1630: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1631: }
1632: if (options->num_user_hostfiles == 0) {
1633: options->user_hostfiles[options->num_user_hostfiles++] =
1634: xstrdup(_PATH_SSH_USER_HOSTFILE);
1635: options->user_hostfiles[options->num_user_hostfiles++] =
1636: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1637: }
1.95 markus 1638: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1639: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1640: if (options->clear_forwardings == 1)
1641: clear_forwardings(options);
1.91 markus 1642: if (options->no_host_authentication_for_localhost == - 1)
1643: options->no_host_authentication_for_localhost = 0;
1.128 markus 1644: if (options->identities_only == -1)
1645: options->identities_only = 0;
1.101 markus 1646: if (options->enable_ssh_keysign == -1)
1647: options->enable_ssh_keysign = 0;
1.105 markus 1648: if (options->rekey_limit == -1)
1649: options->rekey_limit = 0;
1.198 dtucker 1650: if (options->rekey_interval == -1)
1651: options->rekey_interval = 0;
1.107 jakob 1652: if (options->verify_host_key_dns == -1)
1653: options->verify_host_key_dns = 0;
1.127 markus 1654: if (options->server_alive_interval == -1)
1655: options->server_alive_interval = 0;
1656: if (options->server_alive_count_max == -1)
1657: options->server_alive_count_max = 3;
1.132 djm 1658: if (options->control_master == -1)
1659: options->control_master = 0;
1.187 djm 1660: if (options->control_persist == -1) {
1661: options->control_persist = 0;
1662: options->control_persist_timeout = 0;
1663: }
1.136 djm 1664: if (options->hash_known_hosts == -1)
1665: options->hash_known_hosts = 0;
1.144 reyk 1666: if (options->tun_open == -1)
1.145 reyk 1667: options->tun_open = SSH_TUNMODE_NO;
1668: if (options->tun_local == -1)
1669: options->tun_local = SSH_TUNID_ANY;
1670: if (options->tun_remote == -1)
1671: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1672: if (options->permit_local_command == -1)
1673: options->permit_local_command = 0;
1.177 andreas 1674: if (options->use_roaming == -1)
1675: options->use_roaming = 1;
1.167 grunk 1676: if (options->visual_host_key == -1)
1677: options->visual_host_key = 0;
1.171 djm 1678: if (options->zero_knowledge_password_authentication == -1)
1679: options->zero_knowledge_password_authentication = 0;
1.190 djm 1680: if (options->ip_qos_interactive == -1)
1681: options->ip_qos_interactive = IPTOS_LOWDELAY;
1682: if (options->ip_qos_bulk == -1)
1683: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1684: if (options->request_tty == -1)
1685: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 1686: if (options->proxy_use_fdpass == -1)
1687: options->proxy_use_fdpass = 0;
1.209 djm 1688: if (options->canonicalize_max_dots == -1)
1689: options->canonicalize_max_dots = 1;
1690: if (options->canonicalize_fallback_local == -1)
1691: options->canonicalize_fallback_local = 1;
1692: if (options->canonicalize_hostname == -1)
1693: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.207 djm 1694: #define CLEAR_ON_NONE(v) \
1695: do { \
1696: if (v != NULL && strcasecmp(v, "none") == 0) { \
1697: free(v); \
1698: v = NULL; \
1699: } \
1700: } while(0)
1701: CLEAR_ON_NONE(options->local_command);
1702: CLEAR_ON_NONE(options->proxy_command);
1703: CLEAR_ON_NONE(options->control_path);
1.17 markus 1704: /* options->user will be set in the main program if appropriate */
1705: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1706: /* options->host_key_alias should not be set by default */
1.67 markus 1707: /* options->preferred_authentications will be set in ssh */
1.135 djm 1708: }
1709:
1710: /*
1711: * parse_forward
1712: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 1713: * dynamicfwd == 0
1.135 djm 1714: * [listenhost:]listenport:connecthost:connectport
1.168 stevesk 1715: * dynamicfwd == 1
1716: * [listenhost:]listenport
1.135 djm 1717: * returns number of arguments parsed or zero on error
1718: */
1719: int
1.176 djm 1720: parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 1721: {
1722: int i;
1723: char *p, *cp, *fwdarg[4];
1724:
1725: memset(fwd, '\0', sizeof(*fwd));
1726:
1727: cp = p = xstrdup(fwdspec);
1728:
1729: /* skip leading spaces */
1.162 tedu 1730: while (isspace(*cp))
1.135 djm 1731: cp++;
1732:
1733: for (i = 0; i < 4; ++i)
1734: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1735: break;
1736:
1.170 stevesk 1737: /* Check for trailing garbage */
1.135 djm 1738: if (cp != NULL)
1739: i = 0; /* failure */
1740:
1741: switch (i) {
1.168 stevesk 1742: case 1:
1743: fwd->listen_host = NULL;
1744: fwd->listen_port = a2port(fwdarg[0]);
1745: fwd->connect_host = xstrdup("socks");
1746: break;
1747:
1748: case 2:
1749: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1750: fwd->listen_port = a2port(fwdarg[1]);
1751: fwd->connect_host = xstrdup("socks");
1752: break;
1753:
1.135 djm 1754: case 3:
1755: fwd->listen_host = NULL;
1756: fwd->listen_port = a2port(fwdarg[0]);
1757: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1758: fwd->connect_port = a2port(fwdarg[2]);
1759: break;
1760:
1761: case 4:
1762: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1763: fwd->listen_port = a2port(fwdarg[1]);
1764: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1765: fwd->connect_port = a2port(fwdarg[3]);
1766: break;
1767: default:
1768: i = 0; /* failure */
1769: }
1770:
1.202 djm 1771: free(p);
1.135 djm 1772:
1.168 stevesk 1773: if (dynamicfwd) {
1774: if (!(i == 1 || i == 2))
1775: goto fail_free;
1776: } else {
1777: if (!(i == 3 || i == 4))
1778: goto fail_free;
1.175 djm 1779: if (fwd->connect_port <= 0)
1.168 stevesk 1780: goto fail_free;
1781: }
1782:
1.176 djm 1783: if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0))
1.135 djm 1784: goto fail_free;
1785:
1786: if (fwd->connect_host != NULL &&
1787: strlen(fwd->connect_host) >= NI_MAXHOST)
1788: goto fail_free;
1.176 djm 1789: if (fwd->listen_host != NULL &&
1790: strlen(fwd->listen_host) >= NI_MAXHOST)
1791: goto fail_free;
1792:
1.135 djm 1793:
1794: return (i);
1795:
1796: fail_free:
1.202 djm 1797: free(fwd->connect_host);
1798: fwd->connect_host = NULL;
1799: free(fwd->listen_host);
1800: fwd->listen_host = NULL;
1.135 djm 1801: return (0);
1.1 deraadt 1802: }
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