Annotation of src/usr.bin/ssh/readconf.c, Revision 1.210
1.210 ! djm 1: /* $OpenBSD: readconf.c,v 1.209 2013/10/16 22:49:38 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: {
454: char *arg, *attrib, *cmd, *cp = *condition;
455: const char *ruser, *host;
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;
466: host = options->hostname == NULL ? host_arg : options->hostname;
467:
468: debug3("checking match for '%s' host %s", cp, host);
469: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
470: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
471: error("Missing Match criteria for %s", attrib);
472: return -1;
473: }
474: len = strlen(arg);
475: if (strcasecmp(attrib, "host") == 0) {
476: if (match_hostname(host, arg, len) != 1)
477: result = 0;
478: else
479: debug("%.200s line %d: matched 'Host %.100s' ",
480: filename, linenum, host);
481: } else if (strcasecmp(attrib, "originalhost") == 0) {
482: if (match_hostname(host_arg, arg, len) != 1)
483: result = 0;
484: else
485: debug("%.200s line %d: matched "
486: "'OriginalHost %.100s' ",
487: filename, linenum, host_arg);
488: } else if (strcasecmp(attrib, "user") == 0) {
489: if (match_pattern_list(ruser, arg, len, 0) != 1)
490: result = 0;
491: else
492: debug("%.200s line %d: matched 'User %.100s' ",
493: filename, linenum, ruser);
494: } else if (strcasecmp(attrib, "localuser") == 0) {
495: if (match_pattern_list(pw->pw_name, arg, len, 0) != 1)
496: result = 0;
497: else
498: debug("%.200s line %d: matched "
499: "'LocalUser %.100s' ",
500: filename, linenum, pw->pw_name);
1.210 ! djm 501: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 502: if (gethostname(thishost, sizeof(thishost)) == -1)
503: fatal("gethostname: %s", strerror(errno));
504: strlcpy(shorthost, thishost, sizeof(shorthost));
505: shorthost[strcspn(thishost, ".")] = '\0';
506: snprintf(portstr, sizeof(portstr), "%d", port);
507:
508: cmd = percent_expand(arg,
509: "L", shorthost,
510: "d", pw->pw_dir,
511: "h", host,
512: "l", thishost,
513: "n", host_arg,
514: "p", portstr,
515: "r", ruser,
516: "u", pw->pw_name,
517: (char *)NULL);
518: r = execute_in_shell(cmd);
519: if (r == -1) {
1.210 ! djm 520: fatal("%.200s line %d: match exec '%.100s' "
1.206 djm 521: "error", filename, linenum, cmd);
522: } else if (r == 0) {
523: debug("%.200s line %d: matched "
1.210 ! djm 524: "'exec \"%.100s\"' ",
1.206 djm 525: filename, linenum, cmd);
526: } else
527: result = 0;
528: free(cmd);
529: } else {
530: error("Unsupported Match attribute %s", attrib);
531: return -1;
532: }
533: }
534: debug3("match %sfound", result ? "" : "not ");
535: *condition = cp;
536: return result;
537: }
538:
1.208 djm 539: /* Check and prepare a domain name: removes trailing '.' and lowercases */
540: static void
541: valid_domain(char *name, const char *filename, int linenum)
542: {
543: size_t i, l = strlen(name);
544: u_char c, last = '\0';
545:
546: if (l == 0)
547: fatal("%s line %d: empty hostname suffix", filename, linenum);
548: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
549: fatal("%s line %d: hostname suffix \"%.100s\" "
550: "starts with invalid character", filename, linenum, name);
551: for (i = 0; i < l; i++) {
552: c = tolower((u_char)name[i]);
553: name[i] = (char)c;
554: if (last == '.' && c == '.')
555: fatal("%s line %d: hostname suffix \"%.100s\" contains "
556: "consecutive separators", filename, linenum, name);
557: if (c != '.' && c != '-' && !isalnum(c) &&
558: c != '_') /* technically invalid, but common */
559: fatal("%s line %d: hostname suffix \"%.100s\" contains "
560: "invalid characters", filename, linenum, name);
561: last = c;
562: }
563: if (name[l - 1] == '.')
564: name[l - 1] = '\0';
565: }
566:
1.19 markus 567: /*
1.70 stevesk 568: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 569: */
1.26 markus 570: static OpCodes
1.199 djm 571: parse_token(const char *cp, const char *filename, int linenum,
572: const char *ignored_unknown)
1.1 deraadt 573: {
1.199 djm 574: int i;
1.1 deraadt 575:
1.17 markus 576: for (i = 0; keywords[i].name; i++)
1.199 djm 577: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 578: return keywords[i].opcode;
1.199 djm 579: if (ignored_unknown != NULL && match_pattern_list(cp, ignored_unknown,
580: strlen(ignored_unknown), 1) == 1)
581: return oIgnoredUnknownOption;
1.75 stevesk 582: error("%s: line %d: Bad configuration option: %s",
583: filename, linenum, cp);
1.17 markus 584: return oBadOption;
1.1 deraadt 585: }
586:
1.207 djm 587: /* Multistate option parsing */
588: struct multistate {
589: char *key;
590: int value;
591: };
592: static const struct multistate multistate_flag[] = {
593: { "true", 1 },
594: { "false", 0 },
595: { "yes", 1 },
596: { "no", 0 },
597: { NULL, -1 }
598: };
599: static const struct multistate multistate_yesnoask[] = {
600: { "true", 1 },
601: { "false", 0 },
602: { "yes", 1 },
603: { "no", 0 },
604: { "ask", 2 },
605: { NULL, -1 }
606: };
607: static const struct multistate multistate_addressfamily[] = {
608: { "inet", AF_INET },
609: { "inet6", AF_INET6 },
610: { "any", AF_UNSPEC },
611: { NULL, -1 }
612: };
613: static const struct multistate multistate_controlmaster[] = {
614: { "true", SSHCTL_MASTER_YES },
615: { "yes", SSHCTL_MASTER_YES },
616: { "false", SSHCTL_MASTER_NO },
617: { "no", SSHCTL_MASTER_NO },
618: { "auto", SSHCTL_MASTER_AUTO },
619: { "ask", SSHCTL_MASTER_ASK },
620: { "autoask", SSHCTL_MASTER_AUTO_ASK },
621: { NULL, -1 }
622: };
623: static const struct multistate multistate_tunnel[] = {
624: { "ethernet", SSH_TUNMODE_ETHERNET },
625: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
626: { "true", SSH_TUNMODE_DEFAULT },
627: { "yes", SSH_TUNMODE_DEFAULT },
628: { "false", SSH_TUNMODE_NO },
629: { "no", SSH_TUNMODE_NO },
630: { NULL, -1 }
631: };
632: static const struct multistate multistate_requesttty[] = {
633: { "true", REQUEST_TTY_YES },
634: { "yes", REQUEST_TTY_YES },
635: { "false", REQUEST_TTY_NO },
636: { "no", REQUEST_TTY_NO },
637: { "force", REQUEST_TTY_FORCE },
638: { "auto", REQUEST_TTY_AUTO },
639: { NULL, -1 }
640: };
1.209 djm 641: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 642: { "true", SSH_CANONICALISE_YES },
643: { "false", SSH_CANONICALISE_NO },
644: { "yes", SSH_CANONICALISE_YES },
645: { "no", SSH_CANONICALISE_NO },
646: { "always", SSH_CANONICALISE_ALWAYS },
647: { NULL, -1 }
648: };
1.207 djm 649:
1.19 markus 650: /*
651: * Processes a single option line as used in the configuration files. This
652: * only sets those values that have not already been set.
653: */
1.102 markus 654: #define WHITESPACE " \t\r\n"
1.14 markus 655: int
1.206 djm 656: process_config_line(Options *options, struct passwd *pw, const char *host,
657: char *line, const char *filename, int linenum, int *activep, int userconfig)
1.1 deraadt 658: {
1.193 djm 659: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
660: char **cpptr, fwdarg[256];
1.199 djm 661: u_int i, *uintptr, max_entries = 0;
1.206 djm 662: int negated, opcode, *intptr, value, value2, cmdline = 0;
1.164 dtucker 663: LogLevel *log_level_ptr;
1.201 dtucker 664: long long val64;
1.102 markus 665: size_t len;
1.135 djm 666: Forward fwd;
1.207 djm 667: const struct multistate *multistate_ptr;
1.208 djm 668: struct allowed_cname *cname;
1.106 djm 669:
1.206 djm 670: if (activep == NULL) { /* We are processing a command line directive */
671: cmdline = 1;
672: activep = &cmdline;
673: }
674:
1.106 djm 675: /* Strip trailing whitespace */
1.139 deraadt 676: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 677: if (strchr(WHITESPACE, line[len]) == NULL)
678: break;
679: line[len] = '\0';
680: }
1.1 deraadt 681:
1.42 provos 682: s = line;
683: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 684: if ((keyword = strdelim(&s)) == NULL)
685: return 0;
1.42 provos 686: /* Ignore leading whitespace. */
687: if (*keyword == '\0')
1.43 markus 688: keyword = strdelim(&s);
1.56 deraadt 689: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 690: return 0;
1.199 djm 691: /* Match lowercase keyword */
1.207 djm 692: lowercase(keyword);
1.17 markus 693:
1.199 djm 694: opcode = parse_token(keyword, filename, linenum,
695: options->ignored_unknown);
1.17 markus 696:
697: switch (opcode) {
698: case oBadOption:
1.19 markus 699: /* don't panic, but count bad options */
700: return -1;
1.17 markus 701: /* NOTREACHED */
1.199 djm 702: case oIgnoredUnknownOption:
703: debug("%s line %d: Ignored unknown option \"%s\"",
704: filename, linenum, keyword);
705: return 0;
1.111 djm 706: case oConnectTimeout:
707: intptr = &options->connection_timeout;
1.127 markus 708: parse_time:
1.111 djm 709: arg = strdelim(&s);
710: if (!arg || *arg == '\0')
711: fatal("%s line %d: missing time value.",
712: filename, linenum);
713: if ((value = convtime(arg)) == -1)
714: fatal("%s line %d: invalid time value.",
715: filename, linenum);
1.160 dtucker 716: if (*activep && *intptr == -1)
1.111 djm 717: *intptr = value;
718: break;
719:
1.17 markus 720: case oForwardAgent:
721: intptr = &options->forward_agent;
1.207 djm 722: parse_flag:
723: multistate_ptr = multistate_flag;
724: parse_multistate:
1.42 provos 725: arg = strdelim(&s);
1.40 ho 726: if (!arg || *arg == '\0')
1.207 djm 727: fatal("%s line %d: missing argument.",
728: filename, linenum);
729: value = -1;
730: for (i = 0; multistate_ptr[i].key != NULL; i++) {
731: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
732: value = multistate_ptr[i].value;
733: break;
734: }
735: }
736: if (value == -1)
737: fatal("%s line %d: unsupported option \"%s\".",
738: filename, linenum, arg);
1.17 markus 739: if (*activep && *intptr == -1)
740: *intptr = value;
741: break;
742:
743: case oForwardX11:
744: intptr = &options->forward_x11;
745: goto parse_flag;
746:
1.123 markus 747: case oForwardX11Trusted:
748: intptr = &options->forward_x11_trusted;
749: goto parse_flag;
1.186 djm 750:
751: case oForwardX11Timeout:
752: intptr = &options->forward_x11_timeout;
753: goto parse_time;
1.123 markus 754:
1.17 markus 755: case oGatewayPorts:
756: intptr = &options->gateway_ports;
757: goto parse_flag;
758:
1.153 markus 759: case oExitOnForwardFailure:
760: intptr = &options->exit_on_forward_failure;
761: goto parse_flag;
762:
1.17 markus 763: case oUsePrivilegedPort:
764: intptr = &options->use_privileged_port;
765: goto parse_flag;
766:
767: case oPasswordAuthentication:
768: intptr = &options->password_authentication;
769: goto parse_flag;
770:
1.171 djm 771: case oZeroKnowledgePasswordAuthentication:
772: intptr = &options->zero_knowledge_password_authentication;
773: goto parse_flag;
774:
1.48 markus 775: case oKbdInteractiveAuthentication:
776: intptr = &options->kbd_interactive_authentication;
777: goto parse_flag;
778:
779: case oKbdInteractiveDevices:
780: charptr = &options->kbd_interactive_devices;
781: goto parse_string;
782:
1.50 markus 783: case oPubkeyAuthentication:
784: intptr = &options->pubkey_authentication;
1.30 markus 785: goto parse_flag;
786:
1.17 markus 787: case oRSAAuthentication:
788: intptr = &options->rsa_authentication;
789: goto parse_flag;
790:
791: case oRhostsRSAAuthentication:
792: intptr = &options->rhosts_rsa_authentication;
793: goto parse_flag;
794:
1.72 markus 795: case oHostbasedAuthentication:
796: intptr = &options->hostbased_authentication;
797: goto parse_flag;
798:
1.59 markus 799: case oChallengeResponseAuthentication:
1.78 markus 800: intptr = &options->challenge_response_authentication;
1.17 markus 801: goto parse_flag;
1.108 jakob 802:
1.118 markus 803: case oGssAuthentication:
804: intptr = &options->gss_authentication;
805: goto parse_flag;
806:
807: case oGssDelegateCreds:
808: intptr = &options->gss_deleg_creds;
809: goto parse_flag;
810:
1.17 markus 811: case oBatchMode:
812: intptr = &options->batch_mode;
813: goto parse_flag;
814:
815: case oCheckHostIP:
816: intptr = &options->check_host_ip;
1.167 grunk 817: goto parse_flag;
1.17 markus 818:
1.107 jakob 819: case oVerifyHostKeyDNS:
820: intptr = &options->verify_host_key_dns;
1.207 djm 821: multistate_ptr = multistate_yesnoask;
822: goto parse_multistate;
1.107 jakob 823:
1.17 markus 824: case oStrictHostKeyChecking:
825: intptr = &options->strict_host_key_checking;
1.207 djm 826: multistate_ptr = multistate_yesnoask;
827: goto parse_multistate;
1.17 markus 828:
829: case oCompression:
830: intptr = &options->compression;
831: goto parse_flag;
832:
1.126 markus 833: case oTCPKeepAlive:
834: intptr = &options->tcp_keep_alive;
1.17 markus 835: goto parse_flag;
836:
1.91 markus 837: case oNoHostAuthenticationForLocalhost:
838: intptr = &options->no_host_authentication_for_localhost;
839: goto parse_flag;
840:
1.17 markus 841: case oNumberOfPasswordPrompts:
842: intptr = &options->number_of_password_prompts;
843: goto parse_int;
844:
845: case oCompressionLevel:
846: intptr = &options->compression_level;
847: goto parse_int;
848:
1.105 markus 849: case oRekeyLimit:
850: arg = strdelim(&s);
851: if (!arg || *arg == '\0')
1.198 dtucker 852: fatal("%.200s line %d: Missing argument.", filename,
853: linenum);
854: if (strcmp(arg, "default") == 0) {
855: val64 = 0;
856: } else {
1.200 dtucker 857: if (scan_scaled(arg, &val64) == -1)
858: fatal("%.200s line %d: Bad number '%s': %s",
859: filename, linenum, arg, strerror(errno));
860: /* check for too-large or too-small limits */
861: if (val64 > UINT_MAX)
1.198 dtucker 862: fatal("%.200s line %d: RekeyLimit too large",
863: filename, linenum);
864: if (val64 != 0 && val64 < 16)
865: fatal("%.200s line %d: RekeyLimit too small",
866: filename, linenum);
1.105 markus 867: }
1.165 djm 868: if (*activep && options->rekey_limit == -1)
869: options->rekey_limit = (u_int32_t)val64;
1.198 dtucker 870: if (s != NULL) { /* optional rekey interval present */
871: if (strcmp(s, "none") == 0) {
872: (void)strdelim(&s); /* discard */
873: break;
874: }
875: intptr = &options->rekey_interval;
876: goto parse_time;
877: }
1.105 markus 878: break;
879:
1.17 markus 880: case oIdentityFile:
1.42 provos 881: arg = strdelim(&s);
1.40 ho 882: if (!arg || *arg == '\0')
1.17 markus 883: fatal("%.200s line %d: Missing argument.", filename, linenum);
884: if (*activep) {
1.50 markus 885: intptr = &options->num_identity_files;
1.27 markus 886: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 887: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 888: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.196 dtucker 889: add_identity_file(options, NULL, arg, userconfig);
1.17 markus 890: }
891: break;
892:
1.34 markus 893: case oXAuthLocation:
894: charptr=&options->xauth_location;
895: goto parse_string;
896:
1.17 markus 897: case oUser:
898: charptr = &options->user;
899: parse_string:
1.42 provos 900: arg = strdelim(&s);
1.40 ho 901: if (!arg || *arg == '\0')
1.193 djm 902: fatal("%.200s line %d: Missing argument.",
903: filename, linenum);
1.17 markus 904: if (*activep && *charptr == NULL)
1.38 provos 905: *charptr = xstrdup(arg);
1.17 markus 906: break;
907:
908: case oGlobalKnownHostsFile:
1.193 djm 909: cpptr = (char **)&options->system_hostfiles;
910: uintptr = &options->num_system_hostfiles;
911: max_entries = SSH_MAX_HOSTS_FILES;
912: parse_char_array:
913: if (*activep && *uintptr == 0) {
914: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
915: if ((*uintptr) >= max_entries)
916: fatal("%s line %d: "
917: "too many authorized keys files.",
918: filename, linenum);
919: cpptr[(*uintptr)++] = xstrdup(arg);
920: }
921: }
922: return 0;
1.17 markus 923:
924: case oUserKnownHostsFile:
1.193 djm 925: cpptr = (char **)&options->user_hostfiles;
926: uintptr = &options->num_user_hostfiles;
927: max_entries = SSH_MAX_HOSTS_FILES;
928: goto parse_char_array;
1.27 markus 929:
1.17 markus 930: case oHostName:
931: charptr = &options->hostname;
932: goto parse_string;
933:
1.52 markus 934: case oHostKeyAlias:
935: charptr = &options->host_key_alias;
936: goto parse_string;
937:
1.67 markus 938: case oPreferredAuthentications:
939: charptr = &options->preferred_authentications;
940: goto parse_string;
941:
1.77 markus 942: case oBindAddress:
943: charptr = &options->bind_address;
944: goto parse_string;
945:
1.183 markus 946: case oPKCS11Provider:
947: charptr = &options->pkcs11_provider;
1.86 markus 948: goto parse_string;
1.85 jakob 949:
1.17 markus 950: case oProxyCommand:
1.144 reyk 951: charptr = &options->proxy_command;
952: parse_command:
1.113 markus 953: if (s == NULL)
954: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 955: len = strspn(s, WHITESPACE "=");
1.17 markus 956: if (*activep && *charptr == NULL)
1.102 markus 957: *charptr = xstrdup(s + len);
1.17 markus 958: return 0;
959:
960: case oPort:
961: intptr = &options->port;
962: parse_int:
1.42 provos 963: arg = strdelim(&s);
1.40 ho 964: if (!arg || *arg == '\0')
1.17 markus 965: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 966: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 967: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 968:
969: /* Octal, decimal, or hex format? */
1.38 provos 970: value = strtol(arg, &endofnumber, 0);
971: if (arg == endofnumber)
1.21 markus 972: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 973: if (*activep && *intptr == -1)
974: *intptr = value;
975: break;
976:
977: case oConnectionAttempts:
978: intptr = &options->connection_attempts;
979: goto parse_int;
980:
981: case oCipher:
982: intptr = &options->cipher;
1.42 provos 983: arg = strdelim(&s);
1.40 ho 984: if (!arg || *arg == '\0')
1.32 markus 985: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 986: value = cipher_number(arg);
1.17 markus 987: if (value == -1)
988: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 989: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 990: if (*activep && *intptr == -1)
991: *intptr = value;
992: break;
993:
1.25 markus 994: case oCiphers:
1.42 provos 995: arg = strdelim(&s);
1.40 ho 996: if (!arg || *arg == '\0')
1.32 markus 997: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 998: if (!ciphers_valid(arg))
1.31 markus 999: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1000: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1001: if (*activep && options->ciphers == NULL)
1.38 provos 1002: options->ciphers = xstrdup(arg);
1.25 markus 1003: break;
1004:
1.62 markus 1005: case oMacs:
1006: arg = strdelim(&s);
1007: if (!arg || *arg == '\0')
1008: fatal("%.200s line %d: Missing argument.", filename, linenum);
1009: if (!mac_valid(arg))
1010: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1011: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1012: if (*activep && options->macs == NULL)
1013: options->macs = xstrdup(arg);
1014: break;
1015:
1.189 djm 1016: case oKexAlgorithms:
1017: arg = strdelim(&s);
1018: if (!arg || *arg == '\0')
1019: fatal("%.200s line %d: Missing argument.",
1020: filename, linenum);
1021: if (!kex_names_valid(arg))
1022: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1023: filename, linenum, arg ? arg : "<NONE>");
1024: if (*activep && options->kex_algorithms == NULL)
1025: options->kex_algorithms = xstrdup(arg);
1026: break;
1027:
1.76 markus 1028: case oHostKeyAlgorithms:
1029: arg = strdelim(&s);
1030: if (!arg || *arg == '\0')
1031: fatal("%.200s line %d: Missing argument.", filename, linenum);
1032: if (!key_names_valid2(arg))
1033: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 1034: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 1035: if (*activep && options->hostkeyalgorithms == NULL)
1036: options->hostkeyalgorithms = xstrdup(arg);
1037: break;
1038:
1.25 markus 1039: case oProtocol:
1040: intptr = &options->protocol;
1.42 provos 1041: arg = strdelim(&s);
1.40 ho 1042: if (!arg || *arg == '\0')
1.32 markus 1043: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1044: value = proto_spec(arg);
1.25 markus 1045: if (value == SSH_PROTO_UNKNOWN)
1046: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 1047: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1048: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
1049: *intptr = value;
1050: break;
1051:
1.17 markus 1052: case oLogLevel:
1.164 dtucker 1053: log_level_ptr = &options->log_level;
1.42 provos 1054: arg = strdelim(&s);
1.38 provos 1055: value = log_level_number(arg);
1.95 markus 1056: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1057: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1058: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1059: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1060: *log_level_ptr = (LogLevel) value;
1.17 markus 1061: break;
1062:
1.88 stevesk 1063: case oLocalForward:
1.17 markus 1064: case oRemoteForward:
1.168 stevesk 1065: case oDynamicForward:
1.42 provos 1066: arg = strdelim(&s);
1.135 djm 1067: if (arg == NULL || *arg == '\0')
1.88 stevesk 1068: fatal("%.200s line %d: Missing port argument.",
1069: filename, linenum);
1.135 djm 1070:
1.168 stevesk 1071: if (opcode == oLocalForward ||
1072: opcode == oRemoteForward) {
1073: arg2 = strdelim(&s);
1074: if (arg2 == NULL || *arg2 == '\0')
1075: fatal("%.200s line %d: Missing target argument.",
1076: filename, linenum);
1.135 djm 1077:
1.168 stevesk 1078: /* construct a string for parse_forward */
1079: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1080: } else if (opcode == oDynamicForward) {
1081: strlcpy(fwdarg, arg, sizeof(fwdarg));
1082: }
1083:
1084: if (parse_forward(&fwd, fwdarg,
1.176 djm 1085: opcode == oDynamicForward ? 1 : 0,
1086: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1087: fatal("%.200s line %d: Bad forwarding specification.",
1088: filename, linenum);
1.135 djm 1089:
1.88 stevesk 1090: if (*activep) {
1.168 stevesk 1091: if (opcode == oLocalForward ||
1092: opcode == oDynamicForward)
1.135 djm 1093: add_local_forward(options, &fwd);
1.88 stevesk 1094: else if (opcode == oRemoteForward)
1.135 djm 1095: add_remote_forward(options, &fwd);
1.88 stevesk 1096: }
1.17 markus 1097: break;
1.71 markus 1098:
1.90 stevesk 1099: case oClearAllForwardings:
1100: intptr = &options->clear_forwardings;
1101: goto parse_flag;
1102:
1.17 markus 1103: case oHost:
1.206 djm 1104: if (cmdline)
1105: fatal("Host directive not supported as a command-line "
1106: "option");
1.17 markus 1107: *activep = 0;
1.191 djm 1108: arg2 = NULL;
1109: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1110: negated = *arg == '!';
1111: if (negated)
1112: arg++;
1.38 provos 1113: if (match_pattern(host, arg)) {
1.191 djm 1114: if (negated) {
1115: debug("%.200s line %d: Skipping Host "
1116: "block because of negated match "
1117: "for %.100s", filename, linenum,
1118: arg);
1119: *activep = 0;
1120: break;
1121: }
1122: if (!*activep)
1123: arg2 = arg; /* logged below */
1.17 markus 1124: *activep = 1;
1125: }
1.191 djm 1126: }
1127: if (*activep)
1128: debug("%.200s line %d: Applying options for %.100s",
1129: filename, linenum, arg2);
1.42 provos 1130: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1131: return 0;
1132:
1.206 djm 1133: case oMatch:
1134: if (cmdline)
1135: fatal("Host directive not supported as a command-line "
1136: "option");
1137: value = match_cfg_line(options, &s, pw, host,
1138: filename, linenum);
1139: if (value < 0)
1140: fatal("%.200s line %d: Bad Match condition", filename,
1141: linenum);
1142: *activep = value;
1143: break;
1144:
1.17 markus 1145: case oEscapeChar:
1146: intptr = &options->escape_char;
1.42 provos 1147: arg = strdelim(&s);
1.40 ho 1148: if (!arg || *arg == '\0')
1.17 markus 1149: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1150: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1151: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1152: value = (u_char) arg[1] & 31;
1.38 provos 1153: else if (strlen(arg) == 1)
1.51 markus 1154: value = (u_char) arg[0];
1.38 provos 1155: else if (strcmp(arg, "none") == 0)
1.79 stevesk 1156: value = SSH_ESCAPECHAR_NONE;
1.17 markus 1157: else {
1158: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1159: filename, linenum);
1.17 markus 1160: /* NOTREACHED */
1161: value = 0; /* Avoid compiler warning. */
1162: }
1163: if (*activep && *intptr == -1)
1164: *intptr = value;
1.112 djm 1165: break;
1166:
1167: case oAddressFamily:
1.114 djm 1168: intptr = &options->address_family;
1.207 djm 1169: multistate_ptr = multistate_addressfamily;
1170: goto parse_multistate;
1.17 markus 1171:
1.101 markus 1172: case oEnableSSHKeysign:
1173: intptr = &options->enable_ssh_keysign;
1174: goto parse_flag;
1175:
1.128 markus 1176: case oIdentitiesOnly:
1177: intptr = &options->identities_only;
1178: goto parse_flag;
1179:
1.127 markus 1180: case oServerAliveInterval:
1181: intptr = &options->server_alive_interval;
1182: goto parse_time;
1183:
1184: case oServerAliveCountMax:
1185: intptr = &options->server_alive_count_max;
1186: goto parse_int;
1187:
1.130 djm 1188: case oSendEnv:
1189: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1190: if (strchr(arg, '=') != NULL)
1191: fatal("%s line %d: Invalid environment name.",
1192: filename, linenum);
1.137 djm 1193: if (!*activep)
1194: continue;
1.130 djm 1195: if (options->num_send_env >= MAX_SEND_ENV)
1196: fatal("%s line %d: too many send env.",
1197: filename, linenum);
1198: options->send_env[options->num_send_env++] =
1199: xstrdup(arg);
1200: }
1201: break;
1202:
1.132 djm 1203: case oControlPath:
1204: charptr = &options->control_path;
1205: goto parse_string;
1206:
1207: case oControlMaster:
1208: intptr = &options->control_master;
1.207 djm 1209: multistate_ptr = multistate_controlmaster;
1210: goto parse_multistate;
1.132 djm 1211:
1.187 djm 1212: case oControlPersist:
1213: /* no/false/yes/true, or a time spec */
1214: intptr = &options->control_persist;
1215: arg = strdelim(&s);
1216: if (!arg || *arg == '\0')
1217: fatal("%.200s line %d: Missing ControlPersist"
1218: " argument.", filename, linenum);
1219: value = 0;
1220: value2 = 0; /* timeout */
1221: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1222: value = 0;
1223: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1224: value = 1;
1225: else if ((value2 = convtime(arg)) >= 0)
1226: value = 1;
1227: else
1228: fatal("%.200s line %d: Bad ControlPersist argument.",
1229: filename, linenum);
1230: if (*activep && *intptr == -1) {
1231: *intptr = value;
1232: options->control_persist_timeout = value2;
1233: }
1234: break;
1235:
1.136 djm 1236: case oHashKnownHosts:
1237: intptr = &options->hash_known_hosts;
1238: goto parse_flag;
1239:
1.144 reyk 1240: case oTunnel:
1241: intptr = &options->tun_open;
1.207 djm 1242: multistate_ptr = multistate_tunnel;
1243: goto parse_multistate;
1.144 reyk 1244:
1245: case oTunnelDevice:
1246: arg = strdelim(&s);
1247: if (!arg || *arg == '\0')
1248: fatal("%.200s line %d: Missing argument.", filename, linenum);
1249: value = a2tun(arg, &value2);
1.145 reyk 1250: if (value == SSH_TUNID_ERR)
1.144 reyk 1251: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1252: if (*activep) {
1253: options->tun_local = value;
1254: options->tun_remote = value2;
1255: }
1256: break;
1257:
1258: case oLocalCommand:
1259: charptr = &options->local_command;
1260: goto parse_command;
1261:
1262: case oPermitLocalCommand:
1263: intptr = &options->permit_local_command;
1264: goto parse_flag;
1265:
1.167 grunk 1266: case oVisualHostKey:
1267: intptr = &options->visual_host_key;
1268: goto parse_flag;
1269:
1.190 djm 1270: case oIPQoS:
1271: arg = strdelim(&s);
1272: if ((value = parse_ipqos(arg)) == -1)
1273: fatal("%s line %d: Bad IPQoS value: %s",
1274: filename, linenum, arg);
1275: arg = strdelim(&s);
1276: if (arg == NULL)
1277: value2 = value;
1278: else if ((value2 = parse_ipqos(arg)) == -1)
1279: fatal("%s line %d: Bad IPQoS value: %s",
1280: filename, linenum, arg);
1281: if (*activep) {
1282: options->ip_qos_interactive = value;
1283: options->ip_qos_bulk = value2;
1284: }
1285: break;
1286:
1.177 andreas 1287: case oUseRoaming:
1288: intptr = &options->use_roaming;
1289: goto parse_flag;
1290:
1.192 djm 1291: case oRequestTTY:
1292: intptr = &options->request_tty;
1.207 djm 1293: multistate_ptr = multistate_requesttty;
1294: goto parse_multistate;
1.192 djm 1295:
1.199 djm 1296: case oIgnoreUnknown:
1297: charptr = &options->ignored_unknown;
1298: goto parse_string;
1299:
1.205 djm 1300: case oProxyUseFdpass:
1301: intptr = &options->proxy_use_fdpass;
1302: goto parse_flag;
1303:
1.208 djm 1304: case oCanonicalDomains:
1305: value = options->num_canonical_domains != 0;
1306: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1307: valid_domain(arg, filename, linenum);
1308: if (!*activep || value)
1309: continue;
1310: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1311: fatal("%s line %d: too many hostname suffixes.",
1312: filename, linenum);
1313: options->canonical_domains[
1314: options->num_canonical_domains++] = xstrdup(arg);
1315: }
1316: break;
1317:
1.209 djm 1318: case oCanonicalizePermittedCNAMEs:
1.208 djm 1319: value = options->num_permitted_cnames != 0;
1320: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1321: /* Either '*' for everything or 'list:list' */
1322: if (strcmp(arg, "*") == 0)
1323: arg2 = arg;
1324: else {
1325: lowercase(arg);
1326: if ((arg2 = strchr(arg, ':')) == NULL ||
1327: arg2[1] == '\0') {
1328: fatal("%s line %d: "
1329: "Invalid permitted CNAME \"%s\"",
1330: filename, linenum, arg);
1331: }
1332: *arg2 = '\0';
1333: arg2++;
1334: }
1335: if (!*activep || value)
1336: continue;
1337: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1338: fatal("%s line %d: too many permitted CNAMEs.",
1339: filename, linenum);
1340: cname = options->permitted_cnames +
1341: options->num_permitted_cnames++;
1342: cname->source_list = xstrdup(arg);
1343: cname->target_list = xstrdup(arg2);
1344: }
1345: break;
1346:
1.209 djm 1347: case oCanonicalizeHostname:
1348: intptr = &options->canonicalize_hostname;
1349: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1350: goto parse_multistate;
1351:
1.209 djm 1352: case oCanonicalizeMaxDots:
1353: intptr = &options->canonicalize_max_dots;
1.208 djm 1354: goto parse_int;
1355:
1.209 djm 1356: case oCanonicalizeFallbackLocal:
1357: intptr = &options->canonicalize_fallback_local;
1.208 djm 1358: goto parse_flag;
1359:
1.96 markus 1360: case oDeprecated:
1.98 markus 1361: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1362: filename, linenum, keyword);
1.98 markus 1363: return 0;
1.96 markus 1364:
1.110 jakob 1365: case oUnsupported:
1366: error("%s line %d: Unsupported option \"%s\"",
1367: filename, linenum, keyword);
1368: return 0;
1369:
1.17 markus 1370: default:
1371: fatal("process_config_line: Unimplemented opcode %d", opcode);
1372: }
1373:
1374: /* Check that there is no garbage at end of line. */
1.57 djm 1375: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1376: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1377: filename, linenum, arg);
1.39 ho 1378: }
1.17 markus 1379: return 0;
1.1 deraadt 1380: }
1381:
1382:
1.19 markus 1383: /*
1384: * Reads the config file and modifies the options accordingly. Options
1385: * should already be initialized before this call. This never returns if
1.89 stevesk 1386: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1387: */
1.1 deraadt 1388:
1.89 stevesk 1389: int
1.206 djm 1390: read_config_file(const char *filename, struct passwd *pw, const char *host,
1391: Options *options, int flags)
1.1 deraadt 1392: {
1.17 markus 1393: FILE *f;
1394: char line[1024];
1395: int active, linenum;
1396: int bad_options = 0;
1397:
1.129 djm 1398: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1399: return 0;
1.129 djm 1400:
1.196 dtucker 1401: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1402: struct stat sb;
1.134 deraadt 1403:
1.131 dtucker 1404: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1405: fatal("fstat %s: %s", filename, strerror(errno));
1406: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1407: (sb.st_mode & 022) != 0))
1.129 djm 1408: fatal("Bad owner or permissions on %s", filename);
1409: }
1.17 markus 1410:
1411: debug("Reading configuration data %.200s", filename);
1412:
1.19 markus 1413: /*
1414: * Mark that we are now processing the options. This flag is turned
1415: * on/off by Host specifications.
1416: */
1.17 markus 1417: active = 1;
1418: linenum = 0;
1419: while (fgets(line, sizeof(line), f)) {
1420: /* Update line number counter. */
1421: linenum++;
1.206 djm 1422: if (process_config_line(options, pw, host, line, filename,
1423: linenum, &active, flags & SSHCONF_USERCONF) != 0)
1.17 markus 1424: bad_options++;
1425: }
1426: fclose(f);
1427: if (bad_options > 0)
1.64 millert 1428: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1429: filename, bad_options);
1.89 stevesk 1430: return 1;
1.1 deraadt 1431: }
1432:
1.19 markus 1433: /*
1434: * Initializes options to special values that indicate that they have not yet
1435: * been set. Read_config_file will only set options with this value. Options
1436: * are processed in the following order: command line, user config file,
1437: * system config file. Last, fill_default_options is called.
1438: */
1.1 deraadt 1439:
1.26 markus 1440: void
1.17 markus 1441: initialize_options(Options * options)
1.1 deraadt 1442: {
1.17 markus 1443: memset(options, 'X', sizeof(*options));
1444: options->forward_agent = -1;
1445: options->forward_x11 = -1;
1.123 markus 1446: options->forward_x11_trusted = -1;
1.186 djm 1447: options->forward_x11_timeout = -1;
1.153 markus 1448: options->exit_on_forward_failure = -1;
1.34 markus 1449: options->xauth_location = NULL;
1.17 markus 1450: options->gateway_ports = -1;
1451: options->use_privileged_port = -1;
1452: options->rsa_authentication = -1;
1.50 markus 1453: options->pubkey_authentication = -1;
1.78 markus 1454: options->challenge_response_authentication = -1;
1.118 markus 1455: options->gss_authentication = -1;
1456: options->gss_deleg_creds = -1;
1.17 markus 1457: options->password_authentication = -1;
1.48 markus 1458: options->kbd_interactive_authentication = -1;
1459: options->kbd_interactive_devices = NULL;
1.17 markus 1460: options->rhosts_rsa_authentication = -1;
1.72 markus 1461: options->hostbased_authentication = -1;
1.17 markus 1462: options->batch_mode = -1;
1463: options->check_host_ip = -1;
1464: options->strict_host_key_checking = -1;
1465: options->compression = -1;
1.126 markus 1466: options->tcp_keep_alive = -1;
1.17 markus 1467: options->compression_level = -1;
1468: options->port = -1;
1.114 djm 1469: options->address_family = -1;
1.17 markus 1470: options->connection_attempts = -1;
1.111 djm 1471: options->connection_timeout = -1;
1.17 markus 1472: options->number_of_password_prompts = -1;
1473: options->cipher = -1;
1.25 markus 1474: options->ciphers = NULL;
1.62 markus 1475: options->macs = NULL;
1.189 djm 1476: options->kex_algorithms = NULL;
1.76 markus 1477: options->hostkeyalgorithms = NULL;
1.25 markus 1478: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1479: options->num_identity_files = 0;
1480: options->hostname = NULL;
1.52 markus 1481: options->host_key_alias = NULL;
1.17 markus 1482: options->proxy_command = NULL;
1483: options->user = NULL;
1484: options->escape_char = -1;
1.193 djm 1485: options->num_system_hostfiles = 0;
1486: options->num_user_hostfiles = 0;
1.185 djm 1487: options->local_forwards = NULL;
1.17 markus 1488: options->num_local_forwards = 0;
1.185 djm 1489: options->remote_forwards = NULL;
1.17 markus 1490: options->num_remote_forwards = 0;
1.90 stevesk 1491: options->clear_forwardings = -1;
1.95 markus 1492: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1493: options->preferred_authentications = NULL;
1.77 markus 1494: options->bind_address = NULL;
1.183 markus 1495: options->pkcs11_provider = NULL;
1.101 markus 1496: options->enable_ssh_keysign = - 1;
1.91 markus 1497: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1498: options->identities_only = - 1;
1.105 markus 1499: options->rekey_limit = - 1;
1.198 dtucker 1500: options->rekey_interval = -1;
1.107 jakob 1501: options->verify_host_key_dns = -1;
1.127 markus 1502: options->server_alive_interval = -1;
1503: options->server_alive_count_max = -1;
1.130 djm 1504: options->num_send_env = 0;
1.132 djm 1505: options->control_path = NULL;
1506: options->control_master = -1;
1.187 djm 1507: options->control_persist = -1;
1508: options->control_persist_timeout = 0;
1.136 djm 1509: options->hash_known_hosts = -1;
1.144 reyk 1510: options->tun_open = -1;
1511: options->tun_local = -1;
1512: options->tun_remote = -1;
1513: options->local_command = NULL;
1514: options->permit_local_command = -1;
1.177 andreas 1515: options->use_roaming = -1;
1.167 grunk 1516: options->visual_host_key = -1;
1.171 djm 1517: options->zero_knowledge_password_authentication = -1;
1.190 djm 1518: options->ip_qos_interactive = -1;
1519: options->ip_qos_bulk = -1;
1.192 djm 1520: options->request_tty = -1;
1.205 djm 1521: options->proxy_use_fdpass = -1;
1.199 djm 1522: options->ignored_unknown = NULL;
1.208 djm 1523: options->num_canonical_domains = 0;
1524: options->num_permitted_cnames = 0;
1.209 djm 1525: options->canonicalize_max_dots = -1;
1526: options->canonicalize_fallback_local = -1;
1527: options->canonicalize_hostname = -1;
1.1 deraadt 1528: }
1529:
1.19 markus 1530: /*
1531: * Called after processing other sources of option data, this fills those
1532: * options for which no value has been specified with their default values.
1533: */
1.1 deraadt 1534:
1.26 markus 1535: void
1.17 markus 1536: fill_default_options(Options * options)
1.1 deraadt 1537: {
1.17 markus 1538: if (options->forward_agent == -1)
1.33 markus 1539: options->forward_agent = 0;
1.17 markus 1540: if (options->forward_x11 == -1)
1.23 markus 1541: options->forward_x11 = 0;
1.123 markus 1542: if (options->forward_x11_trusted == -1)
1543: options->forward_x11_trusted = 0;
1.186 djm 1544: if (options->forward_x11_timeout == -1)
1545: options->forward_x11_timeout = 1200;
1.153 markus 1546: if (options->exit_on_forward_failure == -1)
1547: options->exit_on_forward_failure = 0;
1.34 markus 1548: if (options->xauth_location == NULL)
1.80 markus 1549: options->xauth_location = _PATH_XAUTH;
1.17 markus 1550: if (options->gateway_ports == -1)
1551: options->gateway_ports = 0;
1552: if (options->use_privileged_port == -1)
1.65 markus 1553: options->use_privileged_port = 0;
1.17 markus 1554: if (options->rsa_authentication == -1)
1555: options->rsa_authentication = 1;
1.50 markus 1556: if (options->pubkey_authentication == -1)
1557: options->pubkey_authentication = 1;
1.78 markus 1558: if (options->challenge_response_authentication == -1)
1.83 markus 1559: options->challenge_response_authentication = 1;
1.118 markus 1560: if (options->gss_authentication == -1)
1.122 markus 1561: options->gss_authentication = 0;
1.118 markus 1562: if (options->gss_deleg_creds == -1)
1563: options->gss_deleg_creds = 0;
1.17 markus 1564: if (options->password_authentication == -1)
1565: options->password_authentication = 1;
1.48 markus 1566: if (options->kbd_interactive_authentication == -1)
1.59 markus 1567: options->kbd_interactive_authentication = 1;
1.17 markus 1568: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1569: options->rhosts_rsa_authentication = 0;
1.72 markus 1570: if (options->hostbased_authentication == -1)
1571: options->hostbased_authentication = 0;
1.17 markus 1572: if (options->batch_mode == -1)
1573: options->batch_mode = 0;
1574: if (options->check_host_ip == -1)
1575: options->check_host_ip = 1;
1576: if (options->strict_host_key_checking == -1)
1577: options->strict_host_key_checking = 2; /* 2 is default */
1578: if (options->compression == -1)
1579: options->compression = 0;
1.126 markus 1580: if (options->tcp_keep_alive == -1)
1581: options->tcp_keep_alive = 1;
1.17 markus 1582: if (options->compression_level == -1)
1583: options->compression_level = 6;
1584: if (options->port == -1)
1585: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1586: if (options->address_family == -1)
1587: options->address_family = AF_UNSPEC;
1.17 markus 1588: if (options->connection_attempts == -1)
1.84 markus 1589: options->connection_attempts = 1;
1.17 markus 1590: if (options->number_of_password_prompts == -1)
1591: options->number_of_password_prompts = 3;
1592: /* Selected in ssh_login(). */
1593: if (options->cipher == -1)
1594: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1595: /* options->ciphers, default set in myproposals.h */
1.62 markus 1596: /* options->macs, default set in myproposals.h */
1.189 djm 1597: /* options->kex_algorithms, default set in myproposals.h */
1.76 markus 1598: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1599: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1600: options->protocol = SSH_PROTO_2;
1.17 markus 1601: if (options->num_identity_files == 0) {
1.50 markus 1602: if (options->protocol & SSH_PROTO_1) {
1.195 dtucker 1603: add_identity_file(options, "~/",
1604: _PATH_SSH_CLIENT_IDENTITY, 0);
1.50 markus 1605: }
1606: if (options->protocol & SSH_PROTO_2) {
1.195 dtucker 1607: add_identity_file(options, "~/",
1608: _PATH_SSH_CLIENT_ID_RSA, 0);
1609: add_identity_file(options, "~/",
1610: _PATH_SSH_CLIENT_ID_DSA, 0);
1611: add_identity_file(options, "~/",
1612: _PATH_SSH_CLIENT_ID_ECDSA, 0);
1.50 markus 1613: }
1.27 markus 1614: }
1.17 markus 1615: if (options->escape_char == -1)
1616: options->escape_char = '~';
1.193 djm 1617: if (options->num_system_hostfiles == 0) {
1618: options->system_hostfiles[options->num_system_hostfiles++] =
1619: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1620: options->system_hostfiles[options->num_system_hostfiles++] =
1621: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1622: }
1623: if (options->num_user_hostfiles == 0) {
1624: options->user_hostfiles[options->num_user_hostfiles++] =
1625: xstrdup(_PATH_SSH_USER_HOSTFILE);
1626: options->user_hostfiles[options->num_user_hostfiles++] =
1627: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1628: }
1.95 markus 1629: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1630: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1631: if (options->clear_forwardings == 1)
1632: clear_forwardings(options);
1.91 markus 1633: if (options->no_host_authentication_for_localhost == - 1)
1634: options->no_host_authentication_for_localhost = 0;
1.128 markus 1635: if (options->identities_only == -1)
1636: options->identities_only = 0;
1.101 markus 1637: if (options->enable_ssh_keysign == -1)
1638: options->enable_ssh_keysign = 0;
1.105 markus 1639: if (options->rekey_limit == -1)
1640: options->rekey_limit = 0;
1.198 dtucker 1641: if (options->rekey_interval == -1)
1642: options->rekey_interval = 0;
1.107 jakob 1643: if (options->verify_host_key_dns == -1)
1644: options->verify_host_key_dns = 0;
1.127 markus 1645: if (options->server_alive_interval == -1)
1646: options->server_alive_interval = 0;
1647: if (options->server_alive_count_max == -1)
1648: options->server_alive_count_max = 3;
1.132 djm 1649: if (options->control_master == -1)
1650: options->control_master = 0;
1.187 djm 1651: if (options->control_persist == -1) {
1652: options->control_persist = 0;
1653: options->control_persist_timeout = 0;
1654: }
1.136 djm 1655: if (options->hash_known_hosts == -1)
1656: options->hash_known_hosts = 0;
1.144 reyk 1657: if (options->tun_open == -1)
1.145 reyk 1658: options->tun_open = SSH_TUNMODE_NO;
1659: if (options->tun_local == -1)
1660: options->tun_local = SSH_TUNID_ANY;
1661: if (options->tun_remote == -1)
1662: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1663: if (options->permit_local_command == -1)
1664: options->permit_local_command = 0;
1.177 andreas 1665: if (options->use_roaming == -1)
1666: options->use_roaming = 1;
1.167 grunk 1667: if (options->visual_host_key == -1)
1668: options->visual_host_key = 0;
1.171 djm 1669: if (options->zero_knowledge_password_authentication == -1)
1670: options->zero_knowledge_password_authentication = 0;
1.190 djm 1671: if (options->ip_qos_interactive == -1)
1672: options->ip_qos_interactive = IPTOS_LOWDELAY;
1673: if (options->ip_qos_bulk == -1)
1674: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1675: if (options->request_tty == -1)
1676: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 1677: if (options->proxy_use_fdpass == -1)
1678: options->proxy_use_fdpass = 0;
1.209 djm 1679: if (options->canonicalize_max_dots == -1)
1680: options->canonicalize_max_dots = 1;
1681: if (options->canonicalize_fallback_local == -1)
1682: options->canonicalize_fallback_local = 1;
1683: if (options->canonicalize_hostname == -1)
1684: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.207 djm 1685: #define CLEAR_ON_NONE(v) \
1686: do { \
1687: if (v != NULL && strcasecmp(v, "none") == 0) { \
1688: free(v); \
1689: v = NULL; \
1690: } \
1691: } while(0)
1692: CLEAR_ON_NONE(options->local_command);
1693: CLEAR_ON_NONE(options->proxy_command);
1694: CLEAR_ON_NONE(options->control_path);
1.17 markus 1695: /* options->user will be set in the main program if appropriate */
1696: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1697: /* options->host_key_alias should not be set by default */
1.67 markus 1698: /* options->preferred_authentications will be set in ssh */
1.135 djm 1699: }
1700:
1701: /*
1702: * parse_forward
1703: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 1704: * dynamicfwd == 0
1.135 djm 1705: * [listenhost:]listenport:connecthost:connectport
1.168 stevesk 1706: * dynamicfwd == 1
1707: * [listenhost:]listenport
1.135 djm 1708: * returns number of arguments parsed or zero on error
1709: */
1710: int
1.176 djm 1711: parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 1712: {
1713: int i;
1714: char *p, *cp, *fwdarg[4];
1715:
1716: memset(fwd, '\0', sizeof(*fwd));
1717:
1718: cp = p = xstrdup(fwdspec);
1719:
1720: /* skip leading spaces */
1.162 tedu 1721: while (isspace(*cp))
1.135 djm 1722: cp++;
1723:
1724: for (i = 0; i < 4; ++i)
1725: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1726: break;
1727:
1.170 stevesk 1728: /* Check for trailing garbage */
1.135 djm 1729: if (cp != NULL)
1730: i = 0; /* failure */
1731:
1732: switch (i) {
1.168 stevesk 1733: case 1:
1734: fwd->listen_host = NULL;
1735: fwd->listen_port = a2port(fwdarg[0]);
1736: fwd->connect_host = xstrdup("socks");
1737: break;
1738:
1739: case 2:
1740: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1741: fwd->listen_port = a2port(fwdarg[1]);
1742: fwd->connect_host = xstrdup("socks");
1743: break;
1744:
1.135 djm 1745: case 3:
1746: fwd->listen_host = NULL;
1747: fwd->listen_port = a2port(fwdarg[0]);
1748: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1749: fwd->connect_port = a2port(fwdarg[2]);
1750: break;
1751:
1752: case 4:
1753: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1754: fwd->listen_port = a2port(fwdarg[1]);
1755: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1756: fwd->connect_port = a2port(fwdarg[3]);
1757: break;
1758: default:
1759: i = 0; /* failure */
1760: }
1761:
1.202 djm 1762: free(p);
1.135 djm 1763:
1.168 stevesk 1764: if (dynamicfwd) {
1765: if (!(i == 1 || i == 2))
1766: goto fail_free;
1767: } else {
1768: if (!(i == 3 || i == 4))
1769: goto fail_free;
1.175 djm 1770: if (fwd->connect_port <= 0)
1.168 stevesk 1771: goto fail_free;
1772: }
1773:
1.176 djm 1774: if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0))
1.135 djm 1775: goto fail_free;
1776:
1777: if (fwd->connect_host != NULL &&
1778: strlen(fwd->connect_host) >= NI_MAXHOST)
1779: goto fail_free;
1.176 djm 1780: if (fwd->listen_host != NULL &&
1781: strlen(fwd->listen_host) >= NI_MAXHOST)
1782: goto fail_free;
1783:
1.135 djm 1784:
1785: return (i);
1786:
1787: fail_free:
1.202 djm 1788: free(fwd->connect_host);
1789: fwd->connect_host = NULL;
1790: free(fwd->listen_host);
1791: fwd->listen_host = NULL;
1.135 djm 1792: return (0);
1.1 deraadt 1793: }
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