Annotation of src/usr.bin/ssh/readconf.c, Revision 1.243
1.243 ! dtucker 1: /* $OpenBSD: readconf.c,v 1.242 2015/10/07 15:59:12 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>
1.220 millert 19: #include <sys/un.h>
1.152 stevesk 20:
21: #include <netinet/in.h>
1.190 djm 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>
1.228 deraadt 34: #include <limits.h>
1.200 dtucker 35: #include <util.h>
1.221 djm 36: #include <vis.h>
1.1 deraadt 37:
1.159 deraadt 38: #include "xmalloc.h"
1.1 deraadt 39: #include "ssh.h"
1.25 markus 40: #include "compat.h"
1.58 markus 41: #include "cipher.h"
1.55 markus 42: #include "pathnames.h"
1.58 markus 43: #include "log.h"
1.227 djm 44: #include "sshkey.h"
1.220 millert 45: #include "misc.h"
1.58 markus 46: #include "readconf.h"
47: #include "match.h"
1.62 markus 48: #include "kex.h"
49: #include "mac.h"
1.206 djm 50: #include "uidswap.h"
1.221 djm 51: #include "myproposal.h"
1.224 djm 52: #include "digest.h"
1.1 deraadt 53:
54: /* Format of the configuration file:
55:
56: # Configuration data is parsed as follows:
57: # 1. command line options
58: # 2. user-specific file
59: # 3. system-wide file
60: # Any configuration value is only changed the first time it is set.
61: # Thus, host-specific definitions should be at the beginning of the
62: # configuration file, and defaults at the end.
63:
64: # Host-specific declarations. These may override anything above. A single
65: # host may match multiple declarations; these are processed in the order
66: # that they are given in.
67:
68: Host *.ngs.fi ngs.fi
1.96 markus 69: User foo
1.1 deraadt 70:
71: Host fake.com
72: HostName another.host.name.real.org
73: User blaah
74: Port 34289
75: ForwardX11 no
76: ForwardAgent no
77:
78: Host books.com
79: RemoteForward 9999 shadows.cs.hut.fi:9999
80: Cipher 3des
81:
82: Host fascist.blob.com
83: Port 23123
84: User tylonen
85: PasswordAuthentication no
86:
87: Host puukko.hut.fi
88: User t35124p
89: ProxyCommand ssh-proxy %h %p
90:
91: Host *.fr
1.96 markus 92: PublicKeyAuthentication no
1.1 deraadt 93:
94: Host *.su
95: Cipher none
96: PasswordAuthentication no
97:
1.144 reyk 98: Host vpn.fake.com
99: Tunnel yes
100: TunnelDevice 3
101:
1.1 deraadt 102: # Defaults for various options
103: Host *
104: ForwardAgent no
1.50 markus 105: ForwardX11 no
1.1 deraadt 106: PasswordAuthentication yes
107: RSAAuthentication yes
108: RhostsRSAAuthentication yes
109: StrictHostKeyChecking yes
1.126 markus 110: TcpKeepAlive no
1.1 deraadt 111: IdentityFile ~/.ssh/identity
112: Port 22
113: EscapeChar ~
114:
115: */
116:
117: /* Keyword tokens. */
118:
1.17 markus 119: typedef enum {
120: oBadOption,
1.206 djm 121: oHost, oMatch,
1.186 djm 122: oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
123: oGatewayPorts, oExitOnForwardFailure,
1.100 deraadt 124: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 125: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 126: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
1.241 djm 127: oCertificateFile,
1.206 djm 128: oUser, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
1.17 markus 129: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
130: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 131: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 132: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.221 djm 133: oPubkeyAuthentication,
1.67 markus 134: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 135: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.183 markus 136: oHostKeyAlgorithms, oBindAddress, oPKCS11Provider,
1.96 markus 137: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 138: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 139: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 140: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.187 djm 141: oSendEnv, oControlPath, oControlMaster, oControlPersist,
142: oHashKnownHosts,
1.144 reyk 143: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.216 djm 144: oVisualHostKey, oUseRoaming,
1.205 djm 145: oKexAlgorithms, oIPQoS, oRequestTTY, oIgnoreUnknown, oProxyUseFdpass,
1.209 djm 146: oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
147: oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
1.223 djm 148: oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
1.230 djm 149: oFingerprintHash, oUpdateHostkeys, oHostbasedKeyTypes,
1.238 markus 150: oPubkeyAcceptedKeyTypes,
1.199 djm 151: oIgnoredUnknownOption, oDeprecated, oUnsupported
1.1 deraadt 152: } OpCodes;
153:
154: /* Textual representations of the tokens. */
155:
1.17 markus 156: static struct {
157: const char *name;
158: OpCodes opcode;
159: } keywords[] = {
160: { "forwardagent", oForwardAgent },
161: { "forwardx11", oForwardX11 },
1.123 markus 162: { "forwardx11trusted", oForwardX11Trusted },
1.186 djm 163: { "forwardx11timeout", oForwardX11Timeout },
1.153 markus 164: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 165: { "xauthlocation", oXAuthLocation },
1.17 markus 166: { "gatewayports", oGatewayPorts },
167: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 168: { "rhostsauthentication", oDeprecated },
1.17 markus 169: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 170: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
171: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 172: { "rsaauthentication", oRSAAuthentication },
1.50 markus 173: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 174: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 175: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 176: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 177: { "challengeresponseauthentication", oChallengeResponseAuthentication },
178: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
179: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 180: { "kerberosauthentication", oUnsupported },
181: { "kerberostgtpassing", oUnsupported },
182: { "afstokenpassing", oUnsupported },
1.118 markus 183: #if defined(GSSAPI)
184: { "gssapiauthentication", oGssAuthentication },
185: { "gssapidelegatecredentials", oGssDelegateCreds },
186: #else
187: { "gssapiauthentication", oUnsupported },
188: { "gssapidelegatecredentials", oUnsupported },
189: #endif
1.96 markus 190: { "fallbacktorsh", oDeprecated },
191: { "usersh", oDeprecated },
1.17 markus 192: { "identityfile", oIdentityFile },
1.174 stevesk 193: { "identityfile2", oIdentityFile }, /* obsolete */
1.128 markus 194: { "identitiesonly", oIdentitiesOnly },
1.241 djm 195: { "certificatefile", oCertificateFile },
1.17 markus 196: { "hostname", oHostName },
1.52 markus 197: { "hostkeyalias", oHostKeyAlias },
1.17 markus 198: { "proxycommand", oProxyCommand },
199: { "port", oPort },
200: { "cipher", oCipher },
1.25 markus 201: { "ciphers", oCiphers },
1.62 markus 202: { "macs", oMacs },
1.25 markus 203: { "protocol", oProtocol },
1.17 markus 204: { "remoteforward", oRemoteForward },
205: { "localforward", oLocalForward },
206: { "user", oUser },
207: { "host", oHost },
1.206 djm 208: { "match", oMatch },
1.17 markus 209: { "escapechar", oEscapeChar },
210: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.193 djm 211: { "globalknownhostsfile2", oDeprecated },
1.174 stevesk 212: { "userknownhostsfile", oUserKnownHostsFile },
1.221 djm 213: { "userknownhostsfile2", oDeprecated },
1.17 markus 214: { "connectionattempts", oConnectionAttempts },
215: { "batchmode", oBatchMode },
216: { "checkhostip", oCheckHostIP },
217: { "stricthostkeychecking", oStrictHostKeyChecking },
218: { "compression", oCompression },
219: { "compressionlevel", oCompressionLevel },
1.126 markus 220: { "tcpkeepalive", oTCPKeepAlive },
221: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 222: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
223: { "loglevel", oLogLevel },
1.71 markus 224: { "dynamicforward", oDynamicForward },
1.67 markus 225: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 226: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 227: { "bindaddress", oBindAddress },
1.183 markus 228: #ifdef ENABLE_PKCS11
229: { "smartcarddevice", oPKCS11Provider },
230: { "pkcs11provider", oPKCS11Provider },
1.110 jakob 231: #else
232: { "smartcarddevice", oUnsupported },
1.183 markus 233: { "pkcs11provider", oUnsupported },
1.110 jakob 234: #endif
1.93 deraadt 235: { "clearallforwardings", oClearAllForwardings },
1.101 markus 236: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 237: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 238: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 239: { "rekeylimit", oRekeyLimit },
1.111 djm 240: { "connecttimeout", oConnectTimeout },
1.112 djm 241: { "addressfamily", oAddressFamily },
1.127 markus 242: { "serveraliveinterval", oServerAliveInterval },
243: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 244: { "sendenv", oSendEnv },
1.132 djm 245: { "controlpath", oControlPath },
246: { "controlmaster", oControlMaster },
1.187 djm 247: { "controlpersist", oControlPersist },
1.136 djm 248: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 249: { "tunnel", oTunnel },
250: { "tunneldevice", oTunnelDevice },
251: { "localcommand", oLocalCommand },
252: { "permitlocalcommand", oPermitLocalCommand },
1.167 grunk 253: { "visualhostkey", oVisualHostKey },
1.177 andreas 254: { "useroaming", oUseRoaming },
1.189 djm 255: { "kexalgorithms", oKexAlgorithms },
1.190 djm 256: { "ipqos", oIPQoS },
1.192 djm 257: { "requesttty", oRequestTTY },
1.205 djm 258: { "proxyusefdpass", oProxyUseFdpass },
1.208 djm 259: { "canonicaldomains", oCanonicalDomains },
1.209 djm 260: { "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
261: { "canonicalizehostname", oCanonicalizeHostname },
262: { "canonicalizemaxdots", oCanonicalizeMaxDots },
263: { "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
1.220 millert 264: { "streamlocalbindmask", oStreamLocalBindMask },
265: { "streamlocalbindunlink", oStreamLocalBindUnlink },
1.223 djm 266: { "revokedhostkeys", oRevokedHostKeys },
1.224 djm 267: { "fingerprinthash", oFingerprintHash },
1.229 djm 268: { "updatehostkeys", oUpdateHostkeys },
1.230 djm 269: { "hostbasedkeytypes", oHostbasedKeyTypes },
1.238 markus 270: { "pubkeyacceptedkeytypes", oPubkeyAcceptedKeyTypes },
1.199 djm 271: { "ignoreunknown", oIgnoreUnknown },
1.171 djm 272:
1.92 stevesk 273: { NULL, oBadOption }
1.13 markus 274: };
275:
1.19 markus 276: /*
277: * Adds a local TCP/IP port forward to options. Never returns if there is an
278: * error.
279: */
1.1 deraadt 280:
1.26 markus 281: void
1.220 millert 282: add_local_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 283: {
1.220 millert 284: struct Forward *fwd;
1.17 markus 285: extern uid_t original_real_uid;
1.185 djm 286:
1.220 millert 287: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0 &&
288: newfwd->listen_path == NULL)
1.64 millert 289: fatal("Privileged ports can only be forwarded by root.");
1.234 deraadt 290: options->local_forwards = xreallocarray(options->local_forwards,
1.185 djm 291: options->num_local_forwards + 1,
292: sizeof(*options->local_forwards));
1.17 markus 293: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 294:
1.172 stevesk 295: fwd->listen_host = newfwd->listen_host;
1.135 djm 296: fwd->listen_port = newfwd->listen_port;
1.220 millert 297: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 298: fwd->connect_host = newfwd->connect_host;
1.135 djm 299: fwd->connect_port = newfwd->connect_port;
1.220 millert 300: fwd->connect_path = newfwd->connect_path;
1.1 deraadt 301: }
302:
1.19 markus 303: /*
304: * Adds a remote TCP/IP port forward to options. Never returns if there is
305: * an error.
306: */
1.1 deraadt 307:
1.26 markus 308: void
1.220 millert 309: add_remote_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 310: {
1.220 millert 311: struct Forward *fwd;
1.185 djm 312:
1.234 deraadt 313: options->remote_forwards = xreallocarray(options->remote_forwards,
1.185 djm 314: options->num_remote_forwards + 1,
315: sizeof(*options->remote_forwards));
1.17 markus 316: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 317:
1.172 stevesk 318: fwd->listen_host = newfwd->listen_host;
1.135 djm 319: fwd->listen_port = newfwd->listen_port;
1.220 millert 320: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 321: fwd->connect_host = newfwd->connect_host;
1.135 djm 322: fwd->connect_port = newfwd->connect_port;
1.220 millert 323: fwd->connect_path = newfwd->connect_path;
1.194 markus 324: fwd->handle = newfwd->handle;
1.184 markus 325: fwd->allocated_port = 0;
1.1 deraadt 326: }
327:
1.90 stevesk 328: static void
329: clear_forwardings(Options *options)
330: {
331: int i;
332:
1.135 djm 333: for (i = 0; i < options->num_local_forwards; i++) {
1.202 djm 334: free(options->local_forwards[i].listen_host);
1.220 millert 335: free(options->local_forwards[i].listen_path);
1.202 djm 336: free(options->local_forwards[i].connect_host);
1.220 millert 337: free(options->local_forwards[i].connect_path);
1.135 djm 338: }
1.185 djm 339: if (options->num_local_forwards > 0) {
1.202 djm 340: free(options->local_forwards);
1.185 djm 341: options->local_forwards = NULL;
342: }
1.90 stevesk 343: options->num_local_forwards = 0;
1.135 djm 344: for (i = 0; i < options->num_remote_forwards; i++) {
1.202 djm 345: free(options->remote_forwards[i].listen_host);
1.220 millert 346: free(options->remote_forwards[i].listen_path);
1.202 djm 347: free(options->remote_forwards[i].connect_host);
1.220 millert 348: free(options->remote_forwards[i].connect_path);
1.135 djm 349: }
1.185 djm 350: if (options->num_remote_forwards > 0) {
1.202 djm 351: free(options->remote_forwards);
1.185 djm 352: options->remote_forwards = NULL;
353: }
1.90 stevesk 354: options->num_remote_forwards = 0;
1.145 reyk 355: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 356: }
357:
1.195 dtucker 358: void
1.241 djm 359: add_certificate_file(Options *options, const char *path, int userprovided)
360: {
361: int i;
362:
363: if (options->num_certificate_files >= SSH_MAX_CERTIFICATE_FILES)
364: fatal("Too many certificate files specified (max %d)",
365: SSH_MAX_CERTIFICATE_FILES);
366:
367: /* Avoid registering duplicates */
368: for (i = 0; i < options->num_certificate_files; i++) {
369: if (options->certificate_file_userprovided[i] == userprovided &&
370: strcmp(options->certificate_files[i], path) == 0) {
371: debug2("%s: ignoring duplicate key %s", __func__, path);
372: return;
373: }
374: }
375:
376: options->certificate_file_userprovided[options->num_certificate_files] =
377: userprovided;
378: options->certificate_files[options->num_certificate_files++] =
379: xstrdup(path);
380: }
381:
382: void
1.195 dtucker 383: add_identity_file(Options *options, const char *dir, const char *filename,
384: int userprovided)
385: {
386: char *path;
1.219 djm 387: int i;
1.195 dtucker 388:
389: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
390: fatal("Too many identity files specified (max %d)",
391: SSH_MAX_IDENTITY_FILES);
392:
393: if (dir == NULL) /* no dir, filename is absolute */
394: path = xstrdup(filename);
395: else
396: (void)xasprintf(&path, "%.100s%.100s", dir, filename);
1.219 djm 397:
398: /* Avoid registering duplicates */
399: for (i = 0; i < options->num_identity_files; i++) {
400: if (options->identity_file_userprovided[i] == userprovided &&
401: strcmp(options->identity_files[i], path) == 0) {
402: debug2("%s: ignoring duplicate key %s", __func__, path);
403: free(path);
404: return;
405: }
406: }
1.195 dtucker 407:
408: options->identity_file_userprovided[options->num_identity_files] =
409: userprovided;
410: options->identity_files[options->num_identity_files++] = path;
411: }
412:
1.206 djm 413: int
414: default_ssh_port(void)
415: {
416: static int port;
417: struct servent *sp;
418:
419: if (port == 0) {
420: sp = getservbyname(SSH_SERVICE_NAME, "tcp");
421: port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
422: }
423: return port;
424: }
425:
426: /*
427: * Execute a command in a shell.
428: * Return its exit status or -1 on abnormal exit.
429: */
430: static int
431: execute_in_shell(const char *cmd)
432: {
1.243 ! dtucker 433: char *shell;
1.206 djm 434: pid_t pid;
435: int devnull, status;
436: extern uid_t original_real_uid;
437:
438: if ((shell = getenv("SHELL")) == NULL)
439: shell = _PATH_BSHELL;
440:
441: /* Need this to redirect subprocess stdin/out */
442: if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
443: fatal("open(/dev/null): %s", strerror(errno));
444:
445: debug("Executing command: '%.500s'", cmd);
446:
447: /* Fork and execute the command. */
448: if ((pid = fork()) == 0) {
449: char *argv[4];
450:
451: /* Child. Permanently give up superuser privileges. */
452: permanently_drop_suid(original_real_uid);
453:
454: /* Redirect child stdin and stdout. Leave stderr */
455: if (dup2(devnull, STDIN_FILENO) == -1)
456: fatal("dup2: %s", strerror(errno));
457: if (dup2(devnull, STDOUT_FILENO) == -1)
458: fatal("dup2: %s", strerror(errno));
459: if (devnull > STDERR_FILENO)
460: close(devnull);
461: closefrom(STDERR_FILENO + 1);
462:
463: argv[0] = shell;
464: argv[1] = "-c";
1.243 ! dtucker 465: argv[2] = cmd;
1.206 djm 466: argv[3] = NULL;
467:
468: execv(argv[0], argv);
469: error("Unable to execute '%.100s': %s", cmd, strerror(errno));
470: /* Die with signal to make this error apparent to parent. */
471: signal(SIGTERM, SIG_DFL);
472: kill(getpid(), SIGTERM);
473: _exit(1);
474: }
475: /* Parent. */
476: if (pid < 0)
477: fatal("%s: fork: %.100s", __func__, strerror(errno));
478:
479: close(devnull);
480:
481: while (waitpid(pid, &status, 0) == -1) {
482: if (errno != EINTR && errno != EAGAIN)
483: fatal("%s: waitpid: %s", __func__, strerror(errno));
484: }
485: if (!WIFEXITED(status)) {
486: error("command '%.100s' exited abnormally", cmd);
487: return -1;
1.221 djm 488: }
1.206 djm 489: debug3("command returned status %d", WEXITSTATUS(status));
490: return WEXITSTATUS(status);
491: }
492:
493: /*
494: * Parse and execute a Match directive.
495: */
496: static int
497: match_cfg_line(Options *options, char **condition, struct passwd *pw,
1.221 djm 498: const char *host_arg, const char *original_host, int post_canon,
499: const char *filename, int linenum)
1.206 djm 500: {
1.221 djm 501: char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria;
1.211 djm 502: const char *ruser;
1.221 djm 503: int r, port, this_result, result = 1, attributes = 0, negate;
1.206 djm 504: char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
505:
506: /*
507: * Configuration is likely to be incomplete at this point so we
508: * must be prepared to use default values.
509: */
510: port = options->port <= 0 ? default_ssh_port() : options->port;
511: ruser = options->user == NULL ? pw->pw_name : options->user;
1.211 djm 512: if (options->hostname != NULL) {
1.212 djm 513: /* NB. Please keep in sync with ssh.c:main() */
1.211 djm 514: host = percent_expand(options->hostname,
515: "h", host_arg, (char *)NULL);
516: } else
517: host = xstrdup(host_arg);
1.206 djm 518:
1.221 djm 519: debug2("checking match for '%s' host %s originally %s",
520: cp, host, original_host);
521: while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') {
522: criteria = NULL;
523: this_result = 1;
524: if ((negate = attrib[0] == '!'))
525: attrib++;
526: /* criteria "all" and "canonical" have no argument */
1.213 dtucker 527: if (strcasecmp(attrib, "all") == 0) {
1.221 djm 528: if (attributes > 1 ||
1.213 dtucker 529: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
1.221 djm 530: error("%.200s line %d: '%s' cannot be combined "
531: "with other Match attributes",
532: filename, linenum, oattrib);
1.213 dtucker 533: result = -1;
534: goto out;
535: }
1.221 djm 536: if (result)
537: result = negate ? 0 : 1;
1.213 dtucker 538: goto out;
539: }
1.221 djm 540: attributes++;
541: if (strcasecmp(attrib, "canonical") == 0) {
542: r = !!post_canon; /* force bitmask member to boolean */
543: if (r == (negate ? 1 : 0))
544: this_result = result = 0;
545: debug3("%.200s line %d: %smatched '%s'",
546: filename, linenum,
547: this_result ? "" : "not ", oattrib);
548: continue;
549: }
550: /* All other criteria require an argument */
1.206 djm 551: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
552: error("Missing Match criteria for %s", attrib);
1.211 djm 553: result = -1;
554: goto out;
1.206 djm 555: }
556: if (strcasecmp(attrib, "host") == 0) {
1.221 djm 557: criteria = xstrdup(host);
1.235 djm 558: r = match_hostname(host, arg) == 1;
1.221 djm 559: if (r == (negate ? 1 : 0))
560: this_result = result = 0;
1.206 djm 561: } else if (strcasecmp(attrib, "originalhost") == 0) {
1.221 djm 562: criteria = xstrdup(original_host);
1.235 djm 563: r = match_hostname(original_host, arg) == 1;
1.221 djm 564: if (r == (negate ? 1 : 0))
565: this_result = result = 0;
1.206 djm 566: } else if (strcasecmp(attrib, "user") == 0) {
1.221 djm 567: criteria = xstrdup(ruser);
1.235 djm 568: r = match_pattern_list(ruser, arg, 0) == 1;
1.221 djm 569: if (r == (negate ? 1 : 0))
570: this_result = result = 0;
1.206 djm 571: } else if (strcasecmp(attrib, "localuser") == 0) {
1.221 djm 572: criteria = xstrdup(pw->pw_name);
1.235 djm 573: r = match_pattern_list(pw->pw_name, arg, 0) == 1;
1.221 djm 574: if (r == (negate ? 1 : 0))
575: this_result = result = 0;
1.210 djm 576: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 577: if (gethostname(thishost, sizeof(thishost)) == -1)
578: fatal("gethostname: %s", strerror(errno));
579: strlcpy(shorthost, thishost, sizeof(shorthost));
580: shorthost[strcspn(thishost, ".")] = '\0';
581: snprintf(portstr, sizeof(portstr), "%d", port);
582:
583: cmd = percent_expand(arg,
584: "L", shorthost,
585: "d", pw->pw_dir,
586: "h", host,
587: "l", thishost,
1.221 djm 588: "n", original_host,
1.206 djm 589: "p", portstr,
590: "r", ruser,
591: "u", pw->pw_name,
592: (char *)NULL);
1.217 djm 593: if (result != 1) {
594: /* skip execution if prior predicate failed */
1.221 djm 595: debug3("%.200s line %d: skipped exec "
596: "\"%.100s\"", filename, linenum, cmd);
597: free(cmd);
598: continue;
599: }
600: r = execute_in_shell(cmd);
601: if (r == -1) {
602: fatal("%.200s line %d: match exec "
603: "'%.100s' error", filename,
604: linenum, cmd);
1.217 djm 605: }
1.221 djm 606: criteria = xstrdup(cmd);
1.206 djm 607: free(cmd);
1.221 djm 608: /* Force exit status to boolean */
609: r = r == 0;
610: if (r == (negate ? 1 : 0))
611: this_result = result = 0;
1.206 djm 612: } else {
613: error("Unsupported Match attribute %s", attrib);
1.211 djm 614: result = -1;
615: goto out;
1.206 djm 616: }
1.221 djm 617: debug3("%.200s line %d: %smatched '%s \"%.100s\"' ",
618: filename, linenum, this_result ? "": "not ",
619: oattrib, criteria);
620: free(criteria);
1.213 dtucker 621: }
622: if (attributes == 0) {
623: error("One or more attributes required for Match");
624: result = -1;
625: goto out;
1.206 djm 626: }
1.221 djm 627: out:
628: if (result != -1)
629: debug2("match %sfound", result ? "" : "not ");
1.206 djm 630: *condition = cp;
1.211 djm 631: free(host);
1.206 djm 632: return result;
633: }
634:
1.208 djm 635: /* Check and prepare a domain name: removes trailing '.' and lowercases */
636: static void
637: valid_domain(char *name, const char *filename, int linenum)
638: {
639: size_t i, l = strlen(name);
640: u_char c, last = '\0';
641:
642: if (l == 0)
643: fatal("%s line %d: empty hostname suffix", filename, linenum);
644: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
645: fatal("%s line %d: hostname suffix \"%.100s\" "
646: "starts with invalid character", filename, linenum, name);
647: for (i = 0; i < l; i++) {
648: c = tolower((u_char)name[i]);
649: name[i] = (char)c;
650: if (last == '.' && c == '.')
651: fatal("%s line %d: hostname suffix \"%.100s\" contains "
652: "consecutive separators", filename, linenum, name);
653: if (c != '.' && c != '-' && !isalnum(c) &&
654: c != '_') /* technically invalid, but common */
655: fatal("%s line %d: hostname suffix \"%.100s\" contains "
656: "invalid characters", filename, linenum, name);
657: last = c;
658: }
659: if (name[l - 1] == '.')
660: name[l - 1] = '\0';
661: }
662:
1.19 markus 663: /*
1.70 stevesk 664: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 665: */
1.26 markus 666: static OpCodes
1.199 djm 667: parse_token(const char *cp, const char *filename, int linenum,
668: const char *ignored_unknown)
1.1 deraadt 669: {
1.199 djm 670: int i;
1.1 deraadt 671:
1.17 markus 672: for (i = 0; keywords[i].name; i++)
1.199 djm 673: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 674: return keywords[i].opcode;
1.235 djm 675: if (ignored_unknown != NULL &&
676: match_pattern_list(cp, ignored_unknown, 1) == 1)
1.199 djm 677: return oIgnoredUnknownOption;
1.75 stevesk 678: error("%s: line %d: Bad configuration option: %s",
679: filename, linenum, cp);
1.17 markus 680: return oBadOption;
1.1 deraadt 681: }
682:
1.207 djm 683: /* Multistate option parsing */
684: struct multistate {
685: char *key;
686: int value;
687: };
688: static const struct multistate multistate_flag[] = {
689: { "true", 1 },
690: { "false", 0 },
691: { "yes", 1 },
692: { "no", 0 },
693: { NULL, -1 }
694: };
695: static const struct multistate multistate_yesnoask[] = {
696: { "true", 1 },
697: { "false", 0 },
698: { "yes", 1 },
699: { "no", 0 },
700: { "ask", 2 },
701: { NULL, -1 }
702: };
703: static const struct multistate multistate_addressfamily[] = {
704: { "inet", AF_INET },
705: { "inet6", AF_INET6 },
706: { "any", AF_UNSPEC },
707: { NULL, -1 }
708: };
709: static const struct multistate multistate_controlmaster[] = {
710: { "true", SSHCTL_MASTER_YES },
711: { "yes", SSHCTL_MASTER_YES },
712: { "false", SSHCTL_MASTER_NO },
713: { "no", SSHCTL_MASTER_NO },
714: { "auto", SSHCTL_MASTER_AUTO },
715: { "ask", SSHCTL_MASTER_ASK },
716: { "autoask", SSHCTL_MASTER_AUTO_ASK },
717: { NULL, -1 }
718: };
719: static const struct multistate multistate_tunnel[] = {
720: { "ethernet", SSH_TUNMODE_ETHERNET },
721: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
722: { "true", SSH_TUNMODE_DEFAULT },
723: { "yes", SSH_TUNMODE_DEFAULT },
724: { "false", SSH_TUNMODE_NO },
725: { "no", SSH_TUNMODE_NO },
726: { NULL, -1 }
727: };
728: static const struct multistate multistate_requesttty[] = {
729: { "true", REQUEST_TTY_YES },
730: { "yes", REQUEST_TTY_YES },
731: { "false", REQUEST_TTY_NO },
732: { "no", REQUEST_TTY_NO },
733: { "force", REQUEST_TTY_FORCE },
734: { "auto", REQUEST_TTY_AUTO },
735: { NULL, -1 }
736: };
1.209 djm 737: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 738: { "true", SSH_CANONICALISE_YES },
739: { "false", SSH_CANONICALISE_NO },
740: { "yes", SSH_CANONICALISE_YES },
741: { "no", SSH_CANONICALISE_NO },
742: { "always", SSH_CANONICALISE_ALWAYS },
743: { NULL, -1 }
744: };
1.207 djm 745:
1.19 markus 746: /*
747: * Processes a single option line as used in the configuration files. This
748: * only sets those values that have not already been set.
749: */
1.102 markus 750: #define WHITESPACE " \t\r\n"
1.14 markus 751: int
1.206 djm 752: process_config_line(Options *options, struct passwd *pw, const char *host,
1.221 djm 753: const char *original_host, char *line, const char *filename,
754: int linenum, int *activep, int flags)
1.1 deraadt 755: {
1.193 djm 756: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
757: char **cpptr, fwdarg[256];
1.199 djm 758: u_int i, *uintptr, max_entries = 0;
1.206 djm 759: int negated, opcode, *intptr, value, value2, cmdline = 0;
1.164 dtucker 760: LogLevel *log_level_ptr;
1.201 dtucker 761: long long val64;
1.102 markus 762: size_t len;
1.220 millert 763: struct Forward fwd;
1.207 djm 764: const struct multistate *multistate_ptr;
1.208 djm 765: struct allowed_cname *cname;
1.106 djm 766:
1.206 djm 767: if (activep == NULL) { /* We are processing a command line directive */
768: cmdline = 1;
769: activep = &cmdline;
770: }
771:
1.106 djm 772: /* Strip trailing whitespace */
1.233 djm 773: if ((len = strlen(line)) == 0)
774: return 0;
775: for (len--; len > 0; len--) {
1.106 djm 776: if (strchr(WHITESPACE, line[len]) == NULL)
777: break;
778: line[len] = '\0';
779: }
1.1 deraadt 780:
1.42 provos 781: s = line;
782: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 783: if ((keyword = strdelim(&s)) == NULL)
784: return 0;
1.42 provos 785: /* Ignore leading whitespace. */
786: if (*keyword == '\0')
1.43 markus 787: keyword = strdelim(&s);
1.56 deraadt 788: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 789: return 0;
1.199 djm 790: /* Match lowercase keyword */
1.207 djm 791: lowercase(keyword);
1.17 markus 792:
1.199 djm 793: opcode = parse_token(keyword, filename, linenum,
794: options->ignored_unknown);
1.17 markus 795:
796: switch (opcode) {
797: case oBadOption:
1.19 markus 798: /* don't panic, but count bad options */
799: return -1;
1.17 markus 800: /* NOTREACHED */
1.199 djm 801: case oIgnoredUnknownOption:
802: debug("%s line %d: Ignored unknown option \"%s\"",
803: filename, linenum, keyword);
804: return 0;
1.111 djm 805: case oConnectTimeout:
806: intptr = &options->connection_timeout;
1.127 markus 807: parse_time:
1.111 djm 808: arg = strdelim(&s);
809: if (!arg || *arg == '\0')
810: fatal("%s line %d: missing time value.",
811: filename, linenum);
1.221 djm 812: if (strcmp(arg, "none") == 0)
813: value = -1;
814: else if ((value = convtime(arg)) == -1)
1.111 djm 815: fatal("%s line %d: invalid time value.",
816: filename, linenum);
1.160 dtucker 817: if (*activep && *intptr == -1)
1.111 djm 818: *intptr = value;
819: break;
820:
1.17 markus 821: case oForwardAgent:
822: intptr = &options->forward_agent;
1.207 djm 823: parse_flag:
824: multistate_ptr = multistate_flag;
825: parse_multistate:
1.42 provos 826: arg = strdelim(&s);
1.40 ho 827: if (!arg || *arg == '\0')
1.207 djm 828: fatal("%s line %d: missing argument.",
829: filename, linenum);
830: value = -1;
831: for (i = 0; multistate_ptr[i].key != NULL; i++) {
832: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
833: value = multistate_ptr[i].value;
834: break;
835: }
836: }
837: if (value == -1)
838: fatal("%s line %d: unsupported option \"%s\".",
839: filename, linenum, arg);
1.17 markus 840: if (*activep && *intptr == -1)
841: *intptr = value;
842: break;
843:
844: case oForwardX11:
845: intptr = &options->forward_x11;
846: goto parse_flag;
847:
1.123 markus 848: case oForwardX11Trusted:
849: intptr = &options->forward_x11_trusted;
850: goto parse_flag;
1.221 djm 851:
1.186 djm 852: case oForwardX11Timeout:
853: intptr = &options->forward_x11_timeout;
854: goto parse_time;
1.123 markus 855:
1.17 markus 856: case oGatewayPorts:
1.220 millert 857: intptr = &options->fwd_opts.gateway_ports;
1.17 markus 858: goto parse_flag;
859:
1.153 markus 860: case oExitOnForwardFailure:
861: intptr = &options->exit_on_forward_failure;
862: goto parse_flag;
863:
1.17 markus 864: case oUsePrivilegedPort:
865: intptr = &options->use_privileged_port;
866: goto parse_flag;
867:
868: case oPasswordAuthentication:
869: intptr = &options->password_authentication;
870: goto parse_flag;
871:
1.48 markus 872: case oKbdInteractiveAuthentication:
873: intptr = &options->kbd_interactive_authentication;
874: goto parse_flag;
875:
876: case oKbdInteractiveDevices:
877: charptr = &options->kbd_interactive_devices;
878: goto parse_string;
879:
1.50 markus 880: case oPubkeyAuthentication:
881: intptr = &options->pubkey_authentication;
1.30 markus 882: goto parse_flag;
883:
1.17 markus 884: case oRSAAuthentication:
885: intptr = &options->rsa_authentication;
886: goto parse_flag;
887:
888: case oRhostsRSAAuthentication:
889: intptr = &options->rhosts_rsa_authentication;
890: goto parse_flag;
891:
1.72 markus 892: case oHostbasedAuthentication:
893: intptr = &options->hostbased_authentication;
894: goto parse_flag;
895:
1.59 markus 896: case oChallengeResponseAuthentication:
1.78 markus 897: intptr = &options->challenge_response_authentication;
1.17 markus 898: goto parse_flag;
1.108 jakob 899:
1.118 markus 900: case oGssAuthentication:
901: intptr = &options->gss_authentication;
902: goto parse_flag;
903:
904: case oGssDelegateCreds:
905: intptr = &options->gss_deleg_creds;
906: goto parse_flag;
907:
1.17 markus 908: case oBatchMode:
909: intptr = &options->batch_mode;
910: goto parse_flag;
911:
912: case oCheckHostIP:
913: intptr = &options->check_host_ip;
1.167 grunk 914: goto parse_flag;
1.17 markus 915:
1.107 jakob 916: case oVerifyHostKeyDNS:
917: intptr = &options->verify_host_key_dns;
1.207 djm 918: multistate_ptr = multistate_yesnoask;
919: goto parse_multistate;
1.107 jakob 920:
1.17 markus 921: case oStrictHostKeyChecking:
922: intptr = &options->strict_host_key_checking;
1.207 djm 923: multistate_ptr = multistate_yesnoask;
924: goto parse_multistate;
1.17 markus 925:
926: case oCompression:
927: intptr = &options->compression;
928: goto parse_flag;
929:
1.126 markus 930: case oTCPKeepAlive:
931: intptr = &options->tcp_keep_alive;
1.17 markus 932: goto parse_flag;
933:
1.91 markus 934: case oNoHostAuthenticationForLocalhost:
935: intptr = &options->no_host_authentication_for_localhost;
936: goto parse_flag;
937:
1.17 markus 938: case oNumberOfPasswordPrompts:
939: intptr = &options->number_of_password_prompts;
940: goto parse_int;
941:
942: case oCompressionLevel:
943: intptr = &options->compression_level;
944: goto parse_int;
945:
1.105 markus 946: case oRekeyLimit:
947: arg = strdelim(&s);
948: if (!arg || *arg == '\0')
1.198 dtucker 949: fatal("%.200s line %d: Missing argument.", filename,
950: linenum);
951: if (strcmp(arg, "default") == 0) {
952: val64 = 0;
953: } else {
1.200 dtucker 954: if (scan_scaled(arg, &val64) == -1)
955: fatal("%.200s line %d: Bad number '%s': %s",
956: filename, linenum, arg, strerror(errno));
957: /* check for too-large or too-small limits */
958: if (val64 > UINT_MAX)
1.198 dtucker 959: fatal("%.200s line %d: RekeyLimit too large",
960: filename, linenum);
961: if (val64 != 0 && val64 < 16)
962: fatal("%.200s line %d: RekeyLimit too small",
963: filename, linenum);
1.105 markus 964: }
1.165 djm 965: if (*activep && options->rekey_limit == -1)
966: options->rekey_limit = (u_int32_t)val64;
1.198 dtucker 967: if (s != NULL) { /* optional rekey interval present */
968: if (strcmp(s, "none") == 0) {
969: (void)strdelim(&s); /* discard */
970: break;
971: }
972: intptr = &options->rekey_interval;
973: goto parse_time;
974: }
1.105 markus 975: break;
976:
1.17 markus 977: case oIdentityFile:
1.42 provos 978: arg = strdelim(&s);
1.40 ho 979: if (!arg || *arg == '\0')
1.17 markus 980: fatal("%.200s line %d: Missing argument.", filename, linenum);
981: if (*activep) {
1.50 markus 982: intptr = &options->num_identity_files;
1.27 markus 983: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 984: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 985: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.221 djm 986: add_identity_file(options, NULL,
987: arg, flags & SSHCONF_USERCONF);
1.17 markus 988: }
989: break;
990:
1.241 djm 991: case oCertificateFile:
992: arg = strdelim(&s);
993: if (!arg || *arg == '\0')
994: fatal("%.200s line %d: Missing argument.",
995: filename, linenum);
996: if (*activep) {
997: intptr = &options->num_certificate_files;
998: if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
999: fatal("%.200s line %d: Too many certificate "
1000: "files specified (max %d).",
1001: filename, linenum,
1002: SSH_MAX_CERTIFICATE_FILES);
1003: }
1004: add_certificate_file(options, arg,
1005: flags & SSHCONF_USERCONF);
1006: }
1007: break;
1008:
1.34 markus 1009: case oXAuthLocation:
1010: charptr=&options->xauth_location;
1011: goto parse_string;
1012:
1.17 markus 1013: case oUser:
1014: charptr = &options->user;
1015: parse_string:
1.42 provos 1016: arg = strdelim(&s);
1.40 ho 1017: if (!arg || *arg == '\0')
1.193 djm 1018: fatal("%.200s line %d: Missing argument.",
1019: filename, linenum);
1.17 markus 1020: if (*activep && *charptr == NULL)
1.38 provos 1021: *charptr = xstrdup(arg);
1.17 markus 1022: break;
1023:
1024: case oGlobalKnownHostsFile:
1.193 djm 1025: cpptr = (char **)&options->system_hostfiles;
1026: uintptr = &options->num_system_hostfiles;
1027: max_entries = SSH_MAX_HOSTS_FILES;
1028: parse_char_array:
1029: if (*activep && *uintptr == 0) {
1030: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1031: if ((*uintptr) >= max_entries)
1032: fatal("%s line %d: "
1033: "too many authorized keys files.",
1034: filename, linenum);
1035: cpptr[(*uintptr)++] = xstrdup(arg);
1036: }
1037: }
1038: return 0;
1.17 markus 1039:
1040: case oUserKnownHostsFile:
1.193 djm 1041: cpptr = (char **)&options->user_hostfiles;
1042: uintptr = &options->num_user_hostfiles;
1043: max_entries = SSH_MAX_HOSTS_FILES;
1044: goto parse_char_array;
1.27 markus 1045:
1.17 markus 1046: case oHostName:
1047: charptr = &options->hostname;
1048: goto parse_string;
1049:
1.52 markus 1050: case oHostKeyAlias:
1051: charptr = &options->host_key_alias;
1052: goto parse_string;
1053:
1.67 markus 1054: case oPreferredAuthentications:
1055: charptr = &options->preferred_authentications;
1056: goto parse_string;
1057:
1.77 markus 1058: case oBindAddress:
1059: charptr = &options->bind_address;
1060: goto parse_string;
1061:
1.183 markus 1062: case oPKCS11Provider:
1063: charptr = &options->pkcs11_provider;
1.86 markus 1064: goto parse_string;
1.85 jakob 1065:
1.17 markus 1066: case oProxyCommand:
1.144 reyk 1067: charptr = &options->proxy_command;
1068: parse_command:
1.113 markus 1069: if (s == NULL)
1070: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 1071: len = strspn(s, WHITESPACE "=");
1.17 markus 1072: if (*activep && *charptr == NULL)
1.102 markus 1073: *charptr = xstrdup(s + len);
1.17 markus 1074: return 0;
1075:
1076: case oPort:
1077: intptr = &options->port;
1078: parse_int:
1.42 provos 1079: arg = strdelim(&s);
1.40 ho 1080: if (!arg || *arg == '\0')
1.17 markus 1081: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1082: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 1083: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 1084:
1085: /* Octal, decimal, or hex format? */
1.38 provos 1086: value = strtol(arg, &endofnumber, 0);
1087: if (arg == endofnumber)
1.21 markus 1088: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 1089: if (*activep && *intptr == -1)
1090: *intptr = value;
1091: break;
1092:
1093: case oConnectionAttempts:
1094: intptr = &options->connection_attempts;
1095: goto parse_int;
1096:
1097: case oCipher:
1098: intptr = &options->cipher;
1.42 provos 1099: arg = strdelim(&s);
1.40 ho 1100: if (!arg || *arg == '\0')
1.32 markus 1101: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1102: value = cipher_number(arg);
1.17 markus 1103: if (value == -1)
1104: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 1105: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 1106: if (*activep && *intptr == -1)
1107: *intptr = value;
1108: break;
1109:
1.25 markus 1110: case oCiphers:
1.42 provos 1111: arg = strdelim(&s);
1.40 ho 1112: if (!arg || *arg == '\0')
1.32 markus 1113: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.239 djm 1114: if (!ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.31 markus 1115: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1116: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1117: if (*activep && options->ciphers == NULL)
1.38 provos 1118: options->ciphers = xstrdup(arg);
1.25 markus 1119: break;
1120:
1.62 markus 1121: case oMacs:
1122: arg = strdelim(&s);
1123: if (!arg || *arg == '\0')
1124: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.239 djm 1125: if (!mac_valid(*arg == '+' ? arg + 1 : arg))
1.62 markus 1126: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1127: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1128: if (*activep && options->macs == NULL)
1129: options->macs = xstrdup(arg);
1130: break;
1131:
1.189 djm 1132: case oKexAlgorithms:
1133: arg = strdelim(&s);
1134: if (!arg || *arg == '\0')
1135: fatal("%.200s line %d: Missing argument.",
1136: filename, linenum);
1.239 djm 1137: if (!kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.189 djm 1138: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1139: filename, linenum, arg ? arg : "<NONE>");
1140: if (*activep && options->kex_algorithms == NULL)
1141: options->kex_algorithms = xstrdup(arg);
1142: break;
1143:
1.76 markus 1144: case oHostKeyAlgorithms:
1.238 markus 1145: charptr = &options->hostkeyalgorithms;
1146: parse_keytypes:
1.76 markus 1147: arg = strdelim(&s);
1148: if (!arg || *arg == '\0')
1.238 markus 1149: fatal("%.200s line %d: Missing argument.",
1150: filename, linenum);
1.239 djm 1151: if (!sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.238 markus 1152: fatal("%s line %d: Bad key types '%s'.",
1153: filename, linenum, arg ? arg : "<NONE>");
1154: if (*activep && *charptr == NULL)
1155: *charptr = xstrdup(arg);
1.76 markus 1156: break;
1157:
1.25 markus 1158: case oProtocol:
1159: intptr = &options->protocol;
1.42 provos 1160: arg = strdelim(&s);
1.40 ho 1161: if (!arg || *arg == '\0')
1.32 markus 1162: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1163: value = proto_spec(arg);
1.25 markus 1164: if (value == SSH_PROTO_UNKNOWN)
1165: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 1166: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1167: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
1168: *intptr = value;
1169: break;
1170:
1.17 markus 1171: case oLogLevel:
1.164 dtucker 1172: log_level_ptr = &options->log_level;
1.42 provos 1173: arg = strdelim(&s);
1.38 provos 1174: value = log_level_number(arg);
1.95 markus 1175: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1176: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1177: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1178: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1179: *log_level_ptr = (LogLevel) value;
1.17 markus 1180: break;
1181:
1.88 stevesk 1182: case oLocalForward:
1.17 markus 1183: case oRemoteForward:
1.168 stevesk 1184: case oDynamicForward:
1.42 provos 1185: arg = strdelim(&s);
1.135 djm 1186: if (arg == NULL || *arg == '\0')
1.88 stevesk 1187: fatal("%.200s line %d: Missing port argument.",
1188: filename, linenum);
1.135 djm 1189:
1.168 stevesk 1190: if (opcode == oLocalForward ||
1191: opcode == oRemoteForward) {
1192: arg2 = strdelim(&s);
1193: if (arg2 == NULL || *arg2 == '\0')
1194: fatal("%.200s line %d: Missing target argument.",
1195: filename, linenum);
1.135 djm 1196:
1.168 stevesk 1197: /* construct a string for parse_forward */
1198: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1199: } else if (opcode == oDynamicForward) {
1200: strlcpy(fwdarg, arg, sizeof(fwdarg));
1201: }
1202:
1203: if (parse_forward(&fwd, fwdarg,
1.176 djm 1204: opcode == oDynamicForward ? 1 : 0,
1205: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1206: fatal("%.200s line %d: Bad forwarding specification.",
1207: filename, linenum);
1.135 djm 1208:
1.88 stevesk 1209: if (*activep) {
1.168 stevesk 1210: if (opcode == oLocalForward ||
1211: opcode == oDynamicForward)
1.135 djm 1212: add_local_forward(options, &fwd);
1.88 stevesk 1213: else if (opcode == oRemoteForward)
1.135 djm 1214: add_remote_forward(options, &fwd);
1.88 stevesk 1215: }
1.17 markus 1216: break;
1.71 markus 1217:
1.90 stevesk 1218: case oClearAllForwardings:
1219: intptr = &options->clear_forwardings;
1220: goto parse_flag;
1221:
1.17 markus 1222: case oHost:
1.206 djm 1223: if (cmdline)
1224: fatal("Host directive not supported as a command-line "
1225: "option");
1.17 markus 1226: *activep = 0;
1.191 djm 1227: arg2 = NULL;
1228: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1229: negated = *arg == '!';
1230: if (negated)
1231: arg++;
1.38 provos 1232: if (match_pattern(host, arg)) {
1.191 djm 1233: if (negated) {
1234: debug("%.200s line %d: Skipping Host "
1235: "block because of negated match "
1236: "for %.100s", filename, linenum,
1237: arg);
1238: *activep = 0;
1239: break;
1240: }
1241: if (!*activep)
1242: arg2 = arg; /* logged below */
1.17 markus 1243: *activep = 1;
1244: }
1.191 djm 1245: }
1246: if (*activep)
1247: debug("%.200s line %d: Applying options for %.100s",
1248: filename, linenum, arg2);
1.42 provos 1249: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1250: return 0;
1251:
1.206 djm 1252: case oMatch:
1253: if (cmdline)
1254: fatal("Host directive not supported as a command-line "
1255: "option");
1.221 djm 1256: value = match_cfg_line(options, &s, pw, host, original_host,
1257: flags & SSHCONF_POSTCANON, filename, linenum);
1.206 djm 1258: if (value < 0)
1259: fatal("%.200s line %d: Bad Match condition", filename,
1260: linenum);
1261: *activep = value;
1262: break;
1263:
1.17 markus 1264: case oEscapeChar:
1265: intptr = &options->escape_char;
1.42 provos 1266: arg = strdelim(&s);
1.40 ho 1267: if (!arg || *arg == '\0')
1.17 markus 1268: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.236 djm 1269: if (strcmp(arg, "none") == 0)
1270: value = SSH_ESCAPECHAR_NONE;
1271: else if (arg[1] == '\0')
1272: value = (u_char) arg[0];
1273: else if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1274: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1275: value = (u_char) arg[1] & 31;
1.17 markus 1276: else {
1277: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1278: filename, linenum);
1.17 markus 1279: /* NOTREACHED */
1280: value = 0; /* Avoid compiler warning. */
1281: }
1282: if (*activep && *intptr == -1)
1283: *intptr = value;
1.112 djm 1284: break;
1285:
1286: case oAddressFamily:
1.114 djm 1287: intptr = &options->address_family;
1.207 djm 1288: multistate_ptr = multistate_addressfamily;
1289: goto parse_multistate;
1.17 markus 1290:
1.101 markus 1291: case oEnableSSHKeysign:
1292: intptr = &options->enable_ssh_keysign;
1293: goto parse_flag;
1294:
1.128 markus 1295: case oIdentitiesOnly:
1296: intptr = &options->identities_only;
1297: goto parse_flag;
1298:
1.127 markus 1299: case oServerAliveInterval:
1300: intptr = &options->server_alive_interval;
1301: goto parse_time;
1302:
1303: case oServerAliveCountMax:
1304: intptr = &options->server_alive_count_max;
1305: goto parse_int;
1306:
1.130 djm 1307: case oSendEnv:
1308: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1309: if (strchr(arg, '=') != NULL)
1310: fatal("%s line %d: Invalid environment name.",
1311: filename, linenum);
1.137 djm 1312: if (!*activep)
1313: continue;
1.130 djm 1314: if (options->num_send_env >= MAX_SEND_ENV)
1315: fatal("%s line %d: too many send env.",
1316: filename, linenum);
1317: options->send_env[options->num_send_env++] =
1318: xstrdup(arg);
1319: }
1320: break;
1321:
1.132 djm 1322: case oControlPath:
1323: charptr = &options->control_path;
1324: goto parse_string;
1325:
1326: case oControlMaster:
1327: intptr = &options->control_master;
1.207 djm 1328: multistate_ptr = multistate_controlmaster;
1329: goto parse_multistate;
1.132 djm 1330:
1.187 djm 1331: case oControlPersist:
1332: /* no/false/yes/true, or a time spec */
1333: intptr = &options->control_persist;
1334: arg = strdelim(&s);
1335: if (!arg || *arg == '\0')
1336: fatal("%.200s line %d: Missing ControlPersist"
1337: " argument.", filename, linenum);
1338: value = 0;
1339: value2 = 0; /* timeout */
1340: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1341: value = 0;
1342: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1343: value = 1;
1344: else if ((value2 = convtime(arg)) >= 0)
1345: value = 1;
1346: else
1347: fatal("%.200s line %d: Bad ControlPersist argument.",
1348: filename, linenum);
1349: if (*activep && *intptr == -1) {
1350: *intptr = value;
1351: options->control_persist_timeout = value2;
1352: }
1353: break;
1354:
1.136 djm 1355: case oHashKnownHosts:
1356: intptr = &options->hash_known_hosts;
1357: goto parse_flag;
1358:
1.144 reyk 1359: case oTunnel:
1360: intptr = &options->tun_open;
1.207 djm 1361: multistate_ptr = multistate_tunnel;
1362: goto parse_multistate;
1.144 reyk 1363:
1364: case oTunnelDevice:
1365: arg = strdelim(&s);
1366: if (!arg || *arg == '\0')
1367: fatal("%.200s line %d: Missing argument.", filename, linenum);
1368: value = a2tun(arg, &value2);
1.145 reyk 1369: if (value == SSH_TUNID_ERR)
1.144 reyk 1370: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1371: if (*activep) {
1372: options->tun_local = value;
1373: options->tun_remote = value2;
1374: }
1375: break;
1376:
1377: case oLocalCommand:
1378: charptr = &options->local_command;
1379: goto parse_command;
1380:
1381: case oPermitLocalCommand:
1382: intptr = &options->permit_local_command;
1383: goto parse_flag;
1384:
1.167 grunk 1385: case oVisualHostKey:
1386: intptr = &options->visual_host_key;
1387: goto parse_flag;
1388:
1.190 djm 1389: case oIPQoS:
1390: arg = strdelim(&s);
1391: if ((value = parse_ipqos(arg)) == -1)
1392: fatal("%s line %d: Bad IPQoS value: %s",
1393: filename, linenum, arg);
1394: arg = strdelim(&s);
1395: if (arg == NULL)
1396: value2 = value;
1397: else if ((value2 = parse_ipqos(arg)) == -1)
1398: fatal("%s line %d: Bad IPQoS value: %s",
1399: filename, linenum, arg);
1400: if (*activep) {
1401: options->ip_qos_interactive = value;
1402: options->ip_qos_bulk = value2;
1403: }
1404: break;
1405:
1.177 andreas 1406: case oUseRoaming:
1407: intptr = &options->use_roaming;
1408: goto parse_flag;
1409:
1.192 djm 1410: case oRequestTTY:
1411: intptr = &options->request_tty;
1.207 djm 1412: multistate_ptr = multistate_requesttty;
1413: goto parse_multistate;
1.192 djm 1414:
1.199 djm 1415: case oIgnoreUnknown:
1416: charptr = &options->ignored_unknown;
1417: goto parse_string;
1418:
1.205 djm 1419: case oProxyUseFdpass:
1420: intptr = &options->proxy_use_fdpass;
1421: goto parse_flag;
1422:
1.208 djm 1423: case oCanonicalDomains:
1424: value = options->num_canonical_domains != 0;
1425: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1426: valid_domain(arg, filename, linenum);
1427: if (!*activep || value)
1428: continue;
1429: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1430: fatal("%s line %d: too many hostname suffixes.",
1431: filename, linenum);
1432: options->canonical_domains[
1433: options->num_canonical_domains++] = xstrdup(arg);
1434: }
1435: break;
1436:
1.209 djm 1437: case oCanonicalizePermittedCNAMEs:
1.208 djm 1438: value = options->num_permitted_cnames != 0;
1439: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1440: /* Either '*' for everything or 'list:list' */
1441: if (strcmp(arg, "*") == 0)
1442: arg2 = arg;
1443: else {
1444: lowercase(arg);
1445: if ((arg2 = strchr(arg, ':')) == NULL ||
1446: arg2[1] == '\0') {
1447: fatal("%s line %d: "
1448: "Invalid permitted CNAME \"%s\"",
1449: filename, linenum, arg);
1450: }
1451: *arg2 = '\0';
1452: arg2++;
1453: }
1454: if (!*activep || value)
1455: continue;
1456: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1457: fatal("%s line %d: too many permitted CNAMEs.",
1458: filename, linenum);
1459: cname = options->permitted_cnames +
1460: options->num_permitted_cnames++;
1461: cname->source_list = xstrdup(arg);
1462: cname->target_list = xstrdup(arg2);
1463: }
1464: break;
1465:
1.209 djm 1466: case oCanonicalizeHostname:
1467: intptr = &options->canonicalize_hostname;
1468: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1469: goto parse_multistate;
1470:
1.209 djm 1471: case oCanonicalizeMaxDots:
1472: intptr = &options->canonicalize_max_dots;
1.208 djm 1473: goto parse_int;
1474:
1.209 djm 1475: case oCanonicalizeFallbackLocal:
1476: intptr = &options->canonicalize_fallback_local;
1.208 djm 1477: goto parse_flag;
1478:
1.220 millert 1479: case oStreamLocalBindMask:
1480: arg = strdelim(&s);
1481: if (!arg || *arg == '\0')
1482: fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum);
1483: /* Parse mode in octal format */
1484: value = strtol(arg, &endofnumber, 8);
1485: if (arg == endofnumber || value < 0 || value > 0777)
1486: fatal("%.200s line %d: Bad mask.", filename, linenum);
1487: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1488: break;
1489:
1490: case oStreamLocalBindUnlink:
1491: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1492: goto parse_flag;
1493:
1.223 djm 1494: case oRevokedHostKeys:
1495: charptr = &options->revoked_host_keys;
1496: goto parse_string;
1497:
1.224 djm 1498: case oFingerprintHash:
1.225 djm 1499: intptr = &options->fingerprint_hash;
1.224 djm 1500: arg = strdelim(&s);
1501: if (!arg || *arg == '\0')
1502: fatal("%.200s line %d: Missing argument.",
1503: filename, linenum);
1504: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1505: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1506: filename, linenum, arg);
1.225 djm 1507: if (*activep && *intptr == -1)
1508: *intptr = value;
1.224 djm 1509: break;
1510:
1.229 djm 1511: case oUpdateHostkeys:
1512: intptr = &options->update_hostkeys;
1.232 djm 1513: multistate_ptr = multistate_yesnoask;
1514: goto parse_multistate;
1.229 djm 1515:
1.230 djm 1516: case oHostbasedKeyTypes:
1517: charptr = &options->hostbased_key_types;
1.238 markus 1518: goto parse_keytypes;
1519:
1520: case oPubkeyAcceptedKeyTypes:
1521: charptr = &options->pubkey_key_types;
1522: goto parse_keytypes;
1.230 djm 1523:
1.96 markus 1524: case oDeprecated:
1.98 markus 1525: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1526: filename, linenum, keyword);
1.98 markus 1527: return 0;
1.96 markus 1528:
1.110 jakob 1529: case oUnsupported:
1530: error("%s line %d: Unsupported option \"%s\"",
1531: filename, linenum, keyword);
1532: return 0;
1533:
1.17 markus 1534: default:
1.221 djm 1535: fatal("%s: Unimplemented opcode %d", __func__, opcode);
1.17 markus 1536: }
1537:
1538: /* Check that there is no garbage at end of line. */
1.57 djm 1539: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1540: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1541: filename, linenum, arg);
1.39 ho 1542: }
1.17 markus 1543: return 0;
1.1 deraadt 1544: }
1545:
1546:
1.19 markus 1547: /*
1548: * Reads the config file and modifies the options accordingly. Options
1549: * should already be initialized before this call. This never returns if
1.89 stevesk 1550: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1551: */
1.1 deraadt 1552:
1.89 stevesk 1553: int
1.206 djm 1554: read_config_file(const char *filename, struct passwd *pw, const char *host,
1.221 djm 1555: const char *original_host, Options *options, int flags)
1.1 deraadt 1556: {
1.17 markus 1557: FILE *f;
1558: char line[1024];
1559: int active, linenum;
1560: int bad_options = 0;
1561:
1.129 djm 1562: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1563: return 0;
1.129 djm 1564:
1.196 dtucker 1565: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1566: struct stat sb;
1.134 deraadt 1567:
1.131 dtucker 1568: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1569: fatal("fstat %s: %s", filename, strerror(errno));
1570: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1571: (sb.st_mode & 022) != 0))
1.129 djm 1572: fatal("Bad owner or permissions on %s", filename);
1573: }
1.17 markus 1574:
1575: debug("Reading configuration data %.200s", filename);
1576:
1.19 markus 1577: /*
1578: * Mark that we are now processing the options. This flag is turned
1579: * on/off by Host specifications.
1580: */
1.17 markus 1581: active = 1;
1582: linenum = 0;
1583: while (fgets(line, sizeof(line), f)) {
1584: /* Update line number counter. */
1585: linenum++;
1.221 djm 1586: if (process_config_line(options, pw, host, original_host,
1587: line, filename, linenum, &active, flags) != 0)
1.17 markus 1588: bad_options++;
1589: }
1590: fclose(f);
1591: if (bad_options > 0)
1.64 millert 1592: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1593: filename, bad_options);
1.89 stevesk 1594: return 1;
1.1 deraadt 1595: }
1596:
1.218 djm 1597: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1598: int
1599: option_clear_or_none(const char *o)
1600: {
1601: return o == NULL || strcasecmp(o, "none") == 0;
1602: }
1603:
1.19 markus 1604: /*
1605: * Initializes options to special values that indicate that they have not yet
1606: * been set. Read_config_file will only set options with this value. Options
1607: * are processed in the following order: command line, user config file,
1608: * system config file. Last, fill_default_options is called.
1609: */
1.1 deraadt 1610:
1.26 markus 1611: void
1.17 markus 1612: initialize_options(Options * options)
1.1 deraadt 1613: {
1.17 markus 1614: memset(options, 'X', sizeof(*options));
1615: options->forward_agent = -1;
1616: options->forward_x11 = -1;
1.123 markus 1617: options->forward_x11_trusted = -1;
1.186 djm 1618: options->forward_x11_timeout = -1;
1.153 markus 1619: options->exit_on_forward_failure = -1;
1.34 markus 1620: options->xauth_location = NULL;
1.220 millert 1621: options->fwd_opts.gateway_ports = -1;
1622: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
1623: options->fwd_opts.streamlocal_bind_unlink = -1;
1.17 markus 1624: options->use_privileged_port = -1;
1625: options->rsa_authentication = -1;
1.50 markus 1626: options->pubkey_authentication = -1;
1.78 markus 1627: options->challenge_response_authentication = -1;
1.118 markus 1628: options->gss_authentication = -1;
1629: options->gss_deleg_creds = -1;
1.17 markus 1630: options->password_authentication = -1;
1.48 markus 1631: options->kbd_interactive_authentication = -1;
1632: options->kbd_interactive_devices = NULL;
1.17 markus 1633: options->rhosts_rsa_authentication = -1;
1.72 markus 1634: options->hostbased_authentication = -1;
1.17 markus 1635: options->batch_mode = -1;
1636: options->check_host_ip = -1;
1637: options->strict_host_key_checking = -1;
1638: options->compression = -1;
1.126 markus 1639: options->tcp_keep_alive = -1;
1.17 markus 1640: options->compression_level = -1;
1641: options->port = -1;
1.114 djm 1642: options->address_family = -1;
1.17 markus 1643: options->connection_attempts = -1;
1.111 djm 1644: options->connection_timeout = -1;
1.17 markus 1645: options->number_of_password_prompts = -1;
1646: options->cipher = -1;
1.25 markus 1647: options->ciphers = NULL;
1.62 markus 1648: options->macs = NULL;
1.189 djm 1649: options->kex_algorithms = NULL;
1.76 markus 1650: options->hostkeyalgorithms = NULL;
1.25 markus 1651: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1652: options->num_identity_files = 0;
1.241 djm 1653: options->num_certificate_files = 0;
1.17 markus 1654: options->hostname = NULL;
1.52 markus 1655: options->host_key_alias = NULL;
1.17 markus 1656: options->proxy_command = NULL;
1657: options->user = NULL;
1658: options->escape_char = -1;
1.193 djm 1659: options->num_system_hostfiles = 0;
1660: options->num_user_hostfiles = 0;
1.185 djm 1661: options->local_forwards = NULL;
1.17 markus 1662: options->num_local_forwards = 0;
1.185 djm 1663: options->remote_forwards = NULL;
1.17 markus 1664: options->num_remote_forwards = 0;
1.90 stevesk 1665: options->clear_forwardings = -1;
1.95 markus 1666: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1667: options->preferred_authentications = NULL;
1.77 markus 1668: options->bind_address = NULL;
1.183 markus 1669: options->pkcs11_provider = NULL;
1.101 markus 1670: options->enable_ssh_keysign = - 1;
1.91 markus 1671: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1672: options->identities_only = - 1;
1.105 markus 1673: options->rekey_limit = - 1;
1.198 dtucker 1674: options->rekey_interval = -1;
1.107 jakob 1675: options->verify_host_key_dns = -1;
1.127 markus 1676: options->server_alive_interval = -1;
1677: options->server_alive_count_max = -1;
1.130 djm 1678: options->num_send_env = 0;
1.132 djm 1679: options->control_path = NULL;
1680: options->control_master = -1;
1.187 djm 1681: options->control_persist = -1;
1682: options->control_persist_timeout = 0;
1.136 djm 1683: options->hash_known_hosts = -1;
1.144 reyk 1684: options->tun_open = -1;
1685: options->tun_local = -1;
1686: options->tun_remote = -1;
1687: options->local_command = NULL;
1688: options->permit_local_command = -1;
1.177 andreas 1689: options->use_roaming = -1;
1.167 grunk 1690: options->visual_host_key = -1;
1.190 djm 1691: options->ip_qos_interactive = -1;
1692: options->ip_qos_bulk = -1;
1.192 djm 1693: options->request_tty = -1;
1.205 djm 1694: options->proxy_use_fdpass = -1;
1.199 djm 1695: options->ignored_unknown = NULL;
1.208 djm 1696: options->num_canonical_domains = 0;
1697: options->num_permitted_cnames = 0;
1.209 djm 1698: options->canonicalize_max_dots = -1;
1699: options->canonicalize_fallback_local = -1;
1700: options->canonicalize_hostname = -1;
1.223 djm 1701: options->revoked_host_keys = NULL;
1.224 djm 1702: options->fingerprint_hash = -1;
1.229 djm 1703: options->update_hostkeys = -1;
1.230 djm 1704: options->hostbased_key_types = NULL;
1.238 markus 1705: options->pubkey_key_types = NULL;
1.1 deraadt 1706: }
1707:
1.19 markus 1708: /*
1.218 djm 1709: * A petite version of fill_default_options() that just fills the options
1710: * needed for hostname canonicalization to proceed.
1711: */
1712: void
1713: fill_default_options_for_canonicalization(Options *options)
1714: {
1715: if (options->canonicalize_max_dots == -1)
1716: options->canonicalize_max_dots = 1;
1717: if (options->canonicalize_fallback_local == -1)
1718: options->canonicalize_fallback_local = 1;
1719: if (options->canonicalize_hostname == -1)
1720: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1721: }
1722:
1723: /*
1.19 markus 1724: * Called after processing other sources of option data, this fills those
1725: * options for which no value has been specified with their default values.
1726: */
1.26 markus 1727: void
1.17 markus 1728: fill_default_options(Options * options)
1.1 deraadt 1729: {
1.17 markus 1730: if (options->forward_agent == -1)
1.33 markus 1731: options->forward_agent = 0;
1.17 markus 1732: if (options->forward_x11 == -1)
1.23 markus 1733: options->forward_x11 = 0;
1.123 markus 1734: if (options->forward_x11_trusted == -1)
1735: options->forward_x11_trusted = 0;
1.186 djm 1736: if (options->forward_x11_timeout == -1)
1737: options->forward_x11_timeout = 1200;
1.153 markus 1738: if (options->exit_on_forward_failure == -1)
1739: options->exit_on_forward_failure = 0;
1.34 markus 1740: if (options->xauth_location == NULL)
1.80 markus 1741: options->xauth_location = _PATH_XAUTH;
1.220 millert 1742: if (options->fwd_opts.gateway_ports == -1)
1743: options->fwd_opts.gateway_ports = 0;
1744: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
1745: options->fwd_opts.streamlocal_bind_mask = 0177;
1746: if (options->fwd_opts.streamlocal_bind_unlink == -1)
1747: options->fwd_opts.streamlocal_bind_unlink = 0;
1.17 markus 1748: if (options->use_privileged_port == -1)
1.65 markus 1749: options->use_privileged_port = 0;
1.17 markus 1750: if (options->rsa_authentication == -1)
1751: options->rsa_authentication = 1;
1.50 markus 1752: if (options->pubkey_authentication == -1)
1753: options->pubkey_authentication = 1;
1.78 markus 1754: if (options->challenge_response_authentication == -1)
1.83 markus 1755: options->challenge_response_authentication = 1;
1.118 markus 1756: if (options->gss_authentication == -1)
1.122 markus 1757: options->gss_authentication = 0;
1.118 markus 1758: if (options->gss_deleg_creds == -1)
1759: options->gss_deleg_creds = 0;
1.17 markus 1760: if (options->password_authentication == -1)
1761: options->password_authentication = 1;
1.48 markus 1762: if (options->kbd_interactive_authentication == -1)
1.59 markus 1763: options->kbd_interactive_authentication = 1;
1.17 markus 1764: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1765: options->rhosts_rsa_authentication = 0;
1.72 markus 1766: if (options->hostbased_authentication == -1)
1767: options->hostbased_authentication = 0;
1.17 markus 1768: if (options->batch_mode == -1)
1769: options->batch_mode = 0;
1770: if (options->check_host_ip == -1)
1771: options->check_host_ip = 1;
1772: if (options->strict_host_key_checking == -1)
1773: options->strict_host_key_checking = 2; /* 2 is default */
1774: if (options->compression == -1)
1775: options->compression = 0;
1.126 markus 1776: if (options->tcp_keep_alive == -1)
1777: options->tcp_keep_alive = 1;
1.17 markus 1778: if (options->compression_level == -1)
1779: options->compression_level = 6;
1780: if (options->port == -1)
1781: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1782: if (options->address_family == -1)
1783: options->address_family = AF_UNSPEC;
1.17 markus 1784: if (options->connection_attempts == -1)
1.84 markus 1785: options->connection_attempts = 1;
1.17 markus 1786: if (options->number_of_password_prompts == -1)
1787: options->number_of_password_prompts = 3;
1788: /* Selected in ssh_login(). */
1789: if (options->cipher == -1)
1790: options->cipher = SSH_CIPHER_NOT_SET;
1.76 markus 1791: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1792: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1793: options->protocol = SSH_PROTO_2;
1.17 markus 1794: if (options->num_identity_files == 0) {
1.50 markus 1795: if (options->protocol & SSH_PROTO_1) {
1.195 dtucker 1796: add_identity_file(options, "~/",
1797: _PATH_SSH_CLIENT_IDENTITY, 0);
1.50 markus 1798: }
1799: if (options->protocol & SSH_PROTO_2) {
1.195 dtucker 1800: add_identity_file(options, "~/",
1801: _PATH_SSH_CLIENT_ID_RSA, 0);
1802: add_identity_file(options, "~/",
1803: _PATH_SSH_CLIENT_ID_DSA, 0);
1804: add_identity_file(options, "~/",
1805: _PATH_SSH_CLIENT_ID_ECDSA, 0);
1.215 markus 1806: add_identity_file(options, "~/",
1807: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.50 markus 1808: }
1.27 markus 1809: }
1.17 markus 1810: if (options->escape_char == -1)
1811: options->escape_char = '~';
1.193 djm 1812: if (options->num_system_hostfiles == 0) {
1813: options->system_hostfiles[options->num_system_hostfiles++] =
1814: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1815: options->system_hostfiles[options->num_system_hostfiles++] =
1816: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1817: }
1818: if (options->num_user_hostfiles == 0) {
1819: options->user_hostfiles[options->num_user_hostfiles++] =
1820: xstrdup(_PATH_SSH_USER_HOSTFILE);
1821: options->user_hostfiles[options->num_user_hostfiles++] =
1822: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1823: }
1.95 markus 1824: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1825: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1826: if (options->clear_forwardings == 1)
1827: clear_forwardings(options);
1.91 markus 1828: if (options->no_host_authentication_for_localhost == - 1)
1829: options->no_host_authentication_for_localhost = 0;
1.128 markus 1830: if (options->identities_only == -1)
1831: options->identities_only = 0;
1.101 markus 1832: if (options->enable_ssh_keysign == -1)
1833: options->enable_ssh_keysign = 0;
1.105 markus 1834: if (options->rekey_limit == -1)
1835: options->rekey_limit = 0;
1.198 dtucker 1836: if (options->rekey_interval == -1)
1837: options->rekey_interval = 0;
1.107 jakob 1838: if (options->verify_host_key_dns == -1)
1839: options->verify_host_key_dns = 0;
1.127 markus 1840: if (options->server_alive_interval == -1)
1841: options->server_alive_interval = 0;
1842: if (options->server_alive_count_max == -1)
1843: options->server_alive_count_max = 3;
1.132 djm 1844: if (options->control_master == -1)
1845: options->control_master = 0;
1.187 djm 1846: if (options->control_persist == -1) {
1847: options->control_persist = 0;
1848: options->control_persist_timeout = 0;
1849: }
1.136 djm 1850: if (options->hash_known_hosts == -1)
1851: options->hash_known_hosts = 0;
1.144 reyk 1852: if (options->tun_open == -1)
1.145 reyk 1853: options->tun_open = SSH_TUNMODE_NO;
1854: if (options->tun_local == -1)
1855: options->tun_local = SSH_TUNID_ANY;
1856: if (options->tun_remote == -1)
1857: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1858: if (options->permit_local_command == -1)
1859: options->permit_local_command = 0;
1.177 andreas 1860: if (options->use_roaming == -1)
1861: options->use_roaming = 1;
1.167 grunk 1862: if (options->visual_host_key == -1)
1863: options->visual_host_key = 0;
1.190 djm 1864: if (options->ip_qos_interactive == -1)
1865: options->ip_qos_interactive = IPTOS_LOWDELAY;
1866: if (options->ip_qos_bulk == -1)
1867: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1868: if (options->request_tty == -1)
1869: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 1870: if (options->proxy_use_fdpass == -1)
1871: options->proxy_use_fdpass = 0;
1.209 djm 1872: if (options->canonicalize_max_dots == -1)
1873: options->canonicalize_max_dots = 1;
1874: if (options->canonicalize_fallback_local == -1)
1875: options->canonicalize_fallback_local = 1;
1876: if (options->canonicalize_hostname == -1)
1877: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.224 djm 1878: if (options->fingerprint_hash == -1)
1879: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.229 djm 1880: if (options->update_hostkeys == -1)
1.231 djm 1881: options->update_hostkeys = 0;
1.239 djm 1882: if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 ||
1883: kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 ||
1884: kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 ||
1885: kex_assemble_names(KEX_DEFAULT_PK_ALG,
1886: &options->hostbased_key_types) != 0 ||
1887: kex_assemble_names(KEX_DEFAULT_PK_ALG,
1888: &options->pubkey_key_types) != 0)
1889: fatal("%s: kex_assemble_names failed", __func__);
1.224 djm 1890:
1.207 djm 1891: #define CLEAR_ON_NONE(v) \
1892: do { \
1.218 djm 1893: if (option_clear_or_none(v)) { \
1.207 djm 1894: free(v); \
1895: v = NULL; \
1896: } \
1897: } while(0)
1898: CLEAR_ON_NONE(options->local_command);
1899: CLEAR_ON_NONE(options->proxy_command);
1900: CLEAR_ON_NONE(options->control_path);
1.223 djm 1901: CLEAR_ON_NONE(options->revoked_host_keys);
1.17 markus 1902: /* options->user will be set in the main program if appropriate */
1903: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1904: /* options->host_key_alias should not be set by default */
1.67 markus 1905: /* options->preferred_authentications will be set in ssh */
1.135 djm 1906: }
1907:
1.220 millert 1908: struct fwdarg {
1909: char *arg;
1910: int ispath;
1911: };
1912:
1913: /*
1914: * parse_fwd_field
1915: * parses the next field in a port forwarding specification.
1916: * sets fwd to the parsed field and advances p past the colon
1917: * or sets it to NULL at end of string.
1918: * returns 0 on success, else non-zero.
1919: */
1920: static int
1921: parse_fwd_field(char **p, struct fwdarg *fwd)
1922: {
1923: char *ep, *cp = *p;
1924: int ispath = 0;
1925:
1926: if (*cp == '\0') {
1927: *p = NULL;
1928: return -1; /* end of string */
1929: }
1930:
1931: /*
1932: * A field escaped with square brackets is used literally.
1933: * XXX - allow ']' to be escaped via backslash?
1934: */
1935: if (*cp == '[') {
1936: /* find matching ']' */
1937: for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
1938: if (*ep == '/')
1939: ispath = 1;
1940: }
1941: /* no matching ']' or not at end of field. */
1942: if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
1943: return -1;
1944: /* NUL terminate the field and advance p past the colon */
1945: *ep++ = '\0';
1946: if (*ep != '\0')
1947: *ep++ = '\0';
1948: fwd->arg = cp + 1;
1949: fwd->ispath = ispath;
1950: *p = ep;
1951: return 0;
1952: }
1953:
1954: for (cp = *p; *cp != '\0'; cp++) {
1955: switch (*cp) {
1956: case '\\':
1957: memmove(cp, cp + 1, strlen(cp + 1) + 1);
1.237 djm 1958: if (*cp == '\0')
1959: return -1;
1.220 millert 1960: break;
1961: case '/':
1962: ispath = 1;
1963: break;
1964: case ':':
1965: *cp++ = '\0';
1966: goto done;
1967: }
1968: }
1969: done:
1970: fwd->arg = *p;
1971: fwd->ispath = ispath;
1972: *p = cp;
1973: return 0;
1974: }
1975:
1.135 djm 1976: /*
1977: * parse_forward
1978: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 1979: * dynamicfwd == 0
1.220 millert 1980: * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
1981: * listenpath:connectpath
1.168 stevesk 1982: * dynamicfwd == 1
1983: * [listenhost:]listenport
1.135 djm 1984: * returns number of arguments parsed or zero on error
1985: */
1986: int
1.220 millert 1987: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 1988: {
1.220 millert 1989: struct fwdarg fwdargs[4];
1990: char *p, *cp;
1.135 djm 1991: int i;
1992:
1.220 millert 1993: memset(fwd, 0, sizeof(*fwd));
1994: memset(fwdargs, 0, sizeof(fwdargs));
1.135 djm 1995:
1996: cp = p = xstrdup(fwdspec);
1997:
1998: /* skip leading spaces */
1.214 deraadt 1999: while (isspace((u_char)*cp))
1.135 djm 2000: cp++;
2001:
1.220 millert 2002: for (i = 0; i < 4; ++i) {
2003: if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.135 djm 2004: break;
1.220 millert 2005: }
1.135 djm 2006:
1.170 stevesk 2007: /* Check for trailing garbage */
1.220 millert 2008: if (cp != NULL && *cp != '\0') {
1.135 djm 2009: i = 0; /* failure */
1.220 millert 2010: }
1.135 djm 2011:
2012: switch (i) {
1.168 stevesk 2013: case 1:
1.220 millert 2014: if (fwdargs[0].ispath) {
2015: fwd->listen_path = xstrdup(fwdargs[0].arg);
2016: fwd->listen_port = PORT_STREAMLOCAL;
2017: } else {
2018: fwd->listen_host = NULL;
2019: fwd->listen_port = a2port(fwdargs[0].arg);
2020: }
1.168 stevesk 2021: fwd->connect_host = xstrdup("socks");
2022: break;
2023:
2024: case 2:
1.220 millert 2025: if (fwdargs[0].ispath && fwdargs[1].ispath) {
2026: fwd->listen_path = xstrdup(fwdargs[0].arg);
2027: fwd->listen_port = PORT_STREAMLOCAL;
2028: fwd->connect_path = xstrdup(fwdargs[1].arg);
2029: fwd->connect_port = PORT_STREAMLOCAL;
2030: } else if (fwdargs[1].ispath) {
2031: fwd->listen_host = NULL;
2032: fwd->listen_port = a2port(fwdargs[0].arg);
2033: fwd->connect_path = xstrdup(fwdargs[1].arg);
2034: fwd->connect_port = PORT_STREAMLOCAL;
2035: } else {
2036: fwd->listen_host = xstrdup(fwdargs[0].arg);
2037: fwd->listen_port = a2port(fwdargs[1].arg);
2038: fwd->connect_host = xstrdup("socks");
2039: }
1.168 stevesk 2040: break;
2041:
1.135 djm 2042: case 3:
1.220 millert 2043: if (fwdargs[0].ispath) {
2044: fwd->listen_path = xstrdup(fwdargs[0].arg);
2045: fwd->listen_port = PORT_STREAMLOCAL;
2046: fwd->connect_host = xstrdup(fwdargs[1].arg);
2047: fwd->connect_port = a2port(fwdargs[2].arg);
2048: } else if (fwdargs[2].ispath) {
2049: fwd->listen_host = xstrdup(fwdargs[0].arg);
2050: fwd->listen_port = a2port(fwdargs[1].arg);
2051: fwd->connect_path = xstrdup(fwdargs[2].arg);
2052: fwd->connect_port = PORT_STREAMLOCAL;
2053: } else {
2054: fwd->listen_host = NULL;
2055: fwd->listen_port = a2port(fwdargs[0].arg);
2056: fwd->connect_host = xstrdup(fwdargs[1].arg);
2057: fwd->connect_port = a2port(fwdargs[2].arg);
2058: }
1.135 djm 2059: break;
2060:
2061: case 4:
1.220 millert 2062: fwd->listen_host = xstrdup(fwdargs[0].arg);
2063: fwd->listen_port = a2port(fwdargs[1].arg);
2064: fwd->connect_host = xstrdup(fwdargs[2].arg);
2065: fwd->connect_port = a2port(fwdargs[3].arg);
1.135 djm 2066: break;
2067: default:
2068: i = 0; /* failure */
2069: }
2070:
1.202 djm 2071: free(p);
1.135 djm 2072:
1.168 stevesk 2073: if (dynamicfwd) {
2074: if (!(i == 1 || i == 2))
2075: goto fail_free;
2076: } else {
1.220 millert 2077: if (!(i == 3 || i == 4)) {
2078: if (fwd->connect_path == NULL &&
2079: fwd->listen_path == NULL)
2080: goto fail_free;
2081: }
2082: if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.168 stevesk 2083: goto fail_free;
2084: }
2085:
1.220 millert 2086: if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
2087: (!remotefwd && fwd->listen_port == 0))
1.135 djm 2088: goto fail_free;
2089: if (fwd->connect_host != NULL &&
2090: strlen(fwd->connect_host) >= NI_MAXHOST)
2091: goto fail_free;
1.220 millert 2092: /* XXX - if connecting to a remote socket, max sun len may not match this host */
2093: if (fwd->connect_path != NULL &&
2094: strlen(fwd->connect_path) >= PATH_MAX_SUN)
2095: goto fail_free;
1.176 djm 2096: if (fwd->listen_host != NULL &&
2097: strlen(fwd->listen_host) >= NI_MAXHOST)
2098: goto fail_free;
1.220 millert 2099: if (fwd->listen_path != NULL &&
2100: strlen(fwd->listen_path) >= PATH_MAX_SUN)
2101: goto fail_free;
1.135 djm 2102:
2103: return (i);
2104:
2105: fail_free:
1.202 djm 2106: free(fwd->connect_host);
2107: fwd->connect_host = NULL;
1.220 millert 2108: free(fwd->connect_path);
2109: fwd->connect_path = NULL;
1.202 djm 2110: free(fwd->listen_host);
2111: fwd->listen_host = NULL;
1.220 millert 2112: free(fwd->listen_path);
2113: fwd->listen_path = NULL;
1.135 djm 2114: return (0);
1.221 djm 2115: }
2116:
2117: /* XXX the following is a near-vebatim copy from servconf.c; refactor */
2118: static const char *
2119: fmt_multistate_int(int val, const struct multistate *m)
2120: {
2121: u_int i;
2122:
2123: for (i = 0; m[i].key != NULL; i++) {
2124: if (m[i].value == val)
2125: return m[i].key;
2126: }
2127: return "UNKNOWN";
2128: }
2129:
2130: static const char *
2131: fmt_intarg(OpCodes code, int val)
2132: {
2133: if (val == -1)
2134: return "unset";
2135: switch (code) {
2136: case oAddressFamily:
2137: return fmt_multistate_int(val, multistate_addressfamily);
2138: case oVerifyHostKeyDNS:
2139: case oStrictHostKeyChecking:
1.232 djm 2140: case oUpdateHostkeys:
1.221 djm 2141: return fmt_multistate_int(val, multistate_yesnoask);
2142: case oControlMaster:
2143: return fmt_multistate_int(val, multistate_controlmaster);
2144: case oTunnel:
2145: return fmt_multistate_int(val, multistate_tunnel);
2146: case oRequestTTY:
2147: return fmt_multistate_int(val, multistate_requesttty);
2148: case oCanonicalizeHostname:
2149: return fmt_multistate_int(val, multistate_canonicalizehostname);
1.224 djm 2150: case oFingerprintHash:
2151: return ssh_digest_alg_name(val);
1.221 djm 2152: case oProtocol:
2153: switch (val) {
2154: case SSH_PROTO_1:
2155: return "1";
2156: case SSH_PROTO_2:
2157: return "2";
2158: case (SSH_PROTO_1|SSH_PROTO_2):
2159: return "2,1";
2160: default:
2161: return "UNKNOWN";
2162: }
2163: default:
2164: switch (val) {
2165: case 0:
2166: return "no";
2167: case 1:
2168: return "yes";
2169: default:
2170: return "UNKNOWN";
2171: }
2172: }
2173: }
2174:
2175: static const char *
2176: lookup_opcode_name(OpCodes code)
2177: {
2178: u_int i;
2179:
2180: for (i = 0; keywords[i].name != NULL; i++)
2181: if (keywords[i].opcode == code)
2182: return(keywords[i].name);
2183: return "UNKNOWN";
2184: }
2185:
2186: static void
2187: dump_cfg_int(OpCodes code, int val)
2188: {
2189: printf("%s %d\n", lookup_opcode_name(code), val);
2190: }
2191:
2192: static void
2193: dump_cfg_fmtint(OpCodes code, int val)
2194: {
2195: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2196: }
2197:
2198: static void
2199: dump_cfg_string(OpCodes code, const char *val)
2200: {
2201: if (val == NULL)
2202: return;
2203: printf("%s %s\n", lookup_opcode_name(code), val);
2204: }
2205:
2206: static void
2207: dump_cfg_strarray(OpCodes code, u_int count, char **vals)
2208: {
2209: u_int i;
2210:
2211: for (i = 0; i < count; i++)
2212: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2213: }
2214:
2215: static void
2216: dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
2217: {
2218: u_int i;
2219:
2220: printf("%s", lookup_opcode_name(code));
2221: for (i = 0; i < count; i++)
2222: printf(" %s", vals[i]);
2223: printf("\n");
2224: }
2225:
2226: static void
2227: dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
2228: {
2229: const struct Forward *fwd;
2230: u_int i;
2231:
2232: /* oDynamicForward */
2233: for (i = 0; i < count; i++) {
2234: fwd = &fwds[i];
2235: if (code == oDynamicForward &&
2236: strcmp(fwd->connect_host, "socks") != 0)
2237: continue;
2238: if (code == oLocalForward &&
2239: strcmp(fwd->connect_host, "socks") == 0)
2240: continue;
2241: printf("%s", lookup_opcode_name(code));
2242: if (fwd->listen_port == PORT_STREAMLOCAL)
2243: printf(" %s", fwd->listen_path);
2244: else if (fwd->listen_host == NULL)
2245: printf(" %d", fwd->listen_port);
2246: else {
2247: printf(" [%s]:%d",
2248: fwd->listen_host, fwd->listen_port);
2249: }
2250: if (code != oDynamicForward) {
2251: if (fwd->connect_port == PORT_STREAMLOCAL)
2252: printf(" %s", fwd->connect_path);
2253: else if (fwd->connect_host == NULL)
2254: printf(" %d", fwd->connect_port);
2255: else {
2256: printf(" [%s]:%d",
2257: fwd->connect_host, fwd->connect_port);
2258: }
2259: }
2260: printf("\n");
2261: }
2262: }
2263:
2264: void
2265: dump_client_config(Options *o, const char *host)
2266: {
2267: int i;
2268: char vbuf[5];
2269:
1.240 djm 2270: /* This is normally prepared in ssh_kex2 */
2271: if (kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->hostkeyalgorithms) != 0)
2272: fatal("%s: kex_assemble_names failed", __func__);
2273:
1.221 djm 2274: /* Most interesting options first: user, host, port */
2275: dump_cfg_string(oUser, o->user);
2276: dump_cfg_string(oHostName, host);
2277: dump_cfg_int(oPort, o->port);
2278:
2279: /* Flag options */
2280: dump_cfg_fmtint(oAddressFamily, o->address_family);
2281: dump_cfg_fmtint(oBatchMode, o->batch_mode);
2282: dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
2283: dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
2284: dump_cfg_fmtint(oChallengeResponseAuthentication, o->challenge_response_authentication);
2285: dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
2286: dump_cfg_fmtint(oCompression, o->compression);
2287: dump_cfg_fmtint(oControlMaster, o->control_master);
2288: dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
2289: dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
1.224 djm 2290: dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
1.221 djm 2291: dump_cfg_fmtint(oForwardAgent, o->forward_agent);
2292: dump_cfg_fmtint(oForwardX11, o->forward_x11);
2293: dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
2294: dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
2295: #ifdef GSSAPI
2296: dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
2297: dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
2298: #endif /* GSSAPI */
2299: dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
2300: dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
2301: dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
2302: dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
2303: dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
2304: dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
2305: dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
2306: dump_cfg_fmtint(oProtocol, o->protocol);
2307: dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
2308: dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
2309: dump_cfg_fmtint(oRequestTTY, o->request_tty);
2310: dump_cfg_fmtint(oRhostsRSAAuthentication, o->rhosts_rsa_authentication);
2311: dump_cfg_fmtint(oRSAAuthentication, o->rsa_authentication);
2312: dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
2313: dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
2314: dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
2315: dump_cfg_fmtint(oTunnel, o->tun_open);
2316: dump_cfg_fmtint(oUsePrivilegedPort, o->use_privileged_port);
2317: dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
2318: dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
1.229 djm 2319: dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
1.221 djm 2320:
2321: /* Integer options */
2322: dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
2323: dump_cfg_int(oCompressionLevel, o->compression_level);
2324: dump_cfg_int(oConnectionAttempts, o->connection_attempts);
2325: dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
2326: dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
2327: dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
2328: dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
2329:
2330: /* String options */
2331: dump_cfg_string(oBindAddress, o->bind_address);
2332: dump_cfg_string(oCiphers, o->ciphers ? o->ciphers : KEX_CLIENT_ENCRYPT);
2333: dump_cfg_string(oControlPath, o->control_path);
1.240 djm 2334: dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
1.221 djm 2335: dump_cfg_string(oHostKeyAlias, o->host_key_alias);
1.230 djm 2336: dump_cfg_string(oHostbasedKeyTypes, o->hostbased_key_types);
1.221 djm 2337: dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
2338: dump_cfg_string(oKexAlgorithms, o->kex_algorithms ? o->kex_algorithms : KEX_CLIENT_KEX);
2339: dump_cfg_string(oLocalCommand, o->local_command);
2340: dump_cfg_string(oLogLevel, log_level_name(o->log_level));
2341: dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC);
2342: dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
2343: dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
2344: dump_cfg_string(oProxyCommand, o->proxy_command);
1.242 djm 2345: dump_cfg_string(oPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.230 djm 2346: dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
1.221 djm 2347: dump_cfg_string(oXAuthLocation, o->xauth_location);
2348:
1.230 djm 2349: /* Forwards */
1.221 djm 2350: dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
2351: dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
2352: dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
2353:
2354: /* String array options */
2355: dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
2356: dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
2357: dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
2358: dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
2359: dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
2360:
2361: /* Special cases */
2362:
2363: /* oConnectTimeout */
2364: if (o->connection_timeout == -1)
2365: printf("connecttimeout none\n");
2366: else
2367: dump_cfg_int(oConnectTimeout, o->connection_timeout);
2368:
2369: /* oTunnelDevice */
2370: printf("tunneldevice");
2371: if (o->tun_local == SSH_TUNID_ANY)
2372: printf(" any");
2373: else
2374: printf(" %d", o->tun_local);
2375: if (o->tun_remote == SSH_TUNID_ANY)
2376: printf(":any");
2377: else
2378: printf(":%d", o->tun_remote);
2379: printf("\n");
2380:
2381: /* oCanonicalizePermittedCNAMEs */
2382: if ( o->num_permitted_cnames > 0) {
2383: printf("canonicalizePermittedcnames");
2384: for (i = 0; i < o->num_permitted_cnames; i++) {
2385: printf(" %s:%s", o->permitted_cnames[i].source_list,
2386: o->permitted_cnames[i].target_list);
2387: }
2388: printf("\n");
2389: }
2390:
2391: /* oCipher */
2392: if (o->cipher != SSH_CIPHER_NOT_SET)
2393: printf("Cipher %s\n", cipher_name(o->cipher));
2394:
2395: /* oControlPersist */
2396: if (o->control_persist == 0 || o->control_persist_timeout == 0)
2397: dump_cfg_fmtint(oControlPersist, o->control_persist);
2398: else
2399: dump_cfg_int(oControlPersist, o->control_persist_timeout);
2400:
2401: /* oEscapeChar */
2402: if (o->escape_char == SSH_ESCAPECHAR_NONE)
2403: printf("escapechar none\n");
2404: else {
2405: vis(vbuf, o->escape_char, VIS_WHITE, 0);
2406: printf("escapechar %s\n", vbuf);
2407: }
2408:
2409: /* oIPQoS */
2410: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2411: printf("%s\n", iptos2str(o->ip_qos_bulk));
2412:
2413: /* oRekeyLimit */
2414: printf("rekeylimit %lld %d\n",
2415: (long long)o->rekey_limit, o->rekey_interval);
2416:
2417: /* oStreamLocalBindMask */
2418: printf("streamlocalbindmask 0%o\n",
2419: o->fwd_opts.streamlocal_bind_mask);
1.1 deraadt 2420: }
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