Annotation of src/usr.bin/ssh/readconf.c, Revision 1.279
1.279 ! markus 1: /* $OpenBSD: readconf.c,v 1.278 2017/09/03 23:33:13 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>
1.252 djm 27: #include <glob.h>
1.155 stevesk 28: #include <netdb.h>
1.206 djm 29: #include <paths.h>
30: #include <pwd.h>
1.159 deraadt 31: #include <signal.h>
1.158 stevesk 32: #include <stdio.h>
1.157 stevesk 33: #include <string.h>
1.156 stevesk 34: #include <unistd.h>
1.228 deraadt 35: #include <limits.h>
1.200 dtucker 36: #include <util.h>
1.221 djm 37: #include <vis.h>
1.1 deraadt 38:
1.159 deraadt 39: #include "xmalloc.h"
1.1 deraadt 40: #include "ssh.h"
1.25 markus 41: #include "compat.h"
1.58 markus 42: #include "cipher.h"
1.55 markus 43: #include "pathnames.h"
1.58 markus 44: #include "log.h"
1.227 djm 45: #include "sshkey.h"
1.220 millert 46: #include "misc.h"
1.58 markus 47: #include "readconf.h"
48: #include "match.h"
1.62 markus 49: #include "kex.h"
50: #include "mac.h"
1.206 djm 51: #include "uidswap.h"
1.221 djm 52: #include "myproposal.h"
1.224 djm 53: #include "digest.h"
1.1 deraadt 54:
55: /* Format of the configuration file:
56:
57: # Configuration data is parsed as follows:
58: # 1. command line options
59: # 2. user-specific file
60: # 3. system-wide file
61: # Any configuration value is only changed the first time it is set.
62: # Thus, host-specific definitions should be at the beginning of the
63: # configuration file, and defaults at the end.
64:
65: # Host-specific declarations. These may override anything above. A single
66: # host may match multiple declarations; these are processed in the order
67: # that they are given in.
68:
69: Host *.ngs.fi ngs.fi
1.96 markus 70: User foo
1.1 deraadt 71:
72: Host fake.com
73: HostName another.host.name.real.org
74: User blaah
75: Port 34289
76: ForwardX11 no
77: ForwardAgent no
78:
79: Host books.com
80: RemoteForward 9999 shadows.cs.hut.fi:9999
1.266 djm 81: Ciphers 3des-cbc
1.1 deraadt 82:
83: Host fascist.blob.com
84: Port 23123
85: User tylonen
86: PasswordAuthentication no
87:
88: Host puukko.hut.fi
89: User t35124p
90: ProxyCommand ssh-proxy %h %p
91:
92: Host *.fr
1.96 markus 93: PublicKeyAuthentication no
1.1 deraadt 94:
95: Host *.su
1.266 djm 96: Ciphers aes128-ctr
1.1 deraadt 97: PasswordAuthentication no
98:
1.144 reyk 99: Host vpn.fake.com
100: Tunnel yes
101: TunnelDevice 3
102:
1.1 deraadt 103: # Defaults for various options
104: Host *
105: ForwardAgent no
1.50 markus 106: ForwardX11 no
1.1 deraadt 107: PasswordAuthentication yes
108: RSAAuthentication yes
109: RhostsRSAAuthentication yes
110: StrictHostKeyChecking yes
1.126 markus 111: TcpKeepAlive no
1.1 deraadt 112: IdentityFile ~/.ssh/identity
113: Port 22
114: EscapeChar ~
115:
116: */
117:
1.252 djm 118: static int read_config_file_depth(const char *filename, struct passwd *pw,
119: const char *host, const char *original_host, Options *options,
120: int flags, int *activep, int depth);
121: static int process_config_line_depth(Options *options, struct passwd *pw,
122: const char *host, const char *original_host, char *line,
123: const char *filename, int linenum, int *activep, int flags, int depth);
124:
1.1 deraadt 125: /* Keyword tokens. */
126:
1.17 markus 127: typedef enum {
128: oBadOption,
1.252 djm 129: oHost, oMatch, oInclude,
1.186 djm 130: oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
131: oGatewayPorts, oExitOnForwardFailure,
1.100 deraadt 132: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 133: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 134: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
1.253 markus 135: oCertificateFile, oAddKeysToAgent, oIdentityAgent,
1.206 djm 136: oUser, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
1.17 markus 137: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
138: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 139: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.273 djm 140: oUsePrivilegedPort, oLogFacility, oLogLevel, oCiphers, oMacs,
1.221 djm 141: oPubkeyAuthentication,
1.67 markus 142: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 143: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.183 markus 144: oHostKeyAlgorithms, oBindAddress, oPKCS11Provider,
1.96 markus 145: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 146: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 147: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 148: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.187 djm 149: oSendEnv, oControlPath, oControlMaster, oControlPersist,
150: oHashKnownHosts,
1.277 bluhm 151: oTunnel, oTunnelDevice,
152: oLocalCommand, oPermitLocalCommand, oRemoteCommand,
1.248 markus 153: oVisualHostKey,
1.205 djm 154: oKexAlgorithms, oIPQoS, oRequestTTY, oIgnoreUnknown, oProxyUseFdpass,
1.209 djm 155: oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
156: oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
1.223 djm 157: oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
1.230 djm 158: oFingerprintHash, oUpdateHostkeys, oHostbasedKeyTypes,
1.257 djm 159: oPubkeyAcceptedKeyTypes, oProxyJump,
1.273 djm 160: oIgnore, oIgnoredUnknownOption, oDeprecated, oUnsupported
1.1 deraadt 161: } OpCodes;
162:
163: /* Textual representations of the tokens. */
164:
1.17 markus 165: static struct {
166: const char *name;
167: OpCodes opcode;
168: } keywords[] = {
1.266 djm 169: /* Deprecated options */
1.273 djm 170: { "protocol", oIgnore }, /* NB. silently ignored */
1.274 djm 171: { "cipher", oDeprecated },
1.266 djm 172: { "fallbacktorsh", oDeprecated },
173: { "globalknownhostsfile2", oDeprecated },
174: { "rhostsauthentication", oDeprecated },
175: { "userknownhostsfile2", oDeprecated },
176: { "useroaming", oDeprecated },
177: { "usersh", oDeprecated },
178:
179: /* Unsupported options */
180: { "afstokenpassing", oUnsupported },
181: { "kerberosauthentication", oUnsupported },
182: { "kerberostgtpassing", oUnsupported },
183:
184: /* Sometimes-unsupported options */
185: #if defined(GSSAPI)
186: { "gssapiauthentication", oGssAuthentication },
187: { "gssapidelegatecredentials", oGssDelegateCreds },
188: # else
189: { "gssapiauthentication", oUnsupported },
190: { "gssapidelegatecredentials", oUnsupported },
191: #endif
192: #ifdef ENABLE_PKCS11
193: { "smartcarddevice", oPKCS11Provider },
194: { "pkcs11provider", oPKCS11Provider },
195: # else
196: { "smartcarddevice", oUnsupported },
197: { "pkcs11provider", oUnsupported },
198: #endif
199: { "rsaauthentication", oUnsupported },
200: { "rhostsrsaauthentication", oUnsupported },
201: { "compressionlevel", oUnsupported },
202:
1.17 markus 203: { "forwardagent", oForwardAgent },
204: { "forwardx11", oForwardX11 },
1.123 markus 205: { "forwardx11trusted", oForwardX11Trusted },
1.186 djm 206: { "forwardx11timeout", oForwardX11Timeout },
1.153 markus 207: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 208: { "xauthlocation", oXAuthLocation },
1.17 markus 209: { "gatewayports", oGatewayPorts },
210: { "useprivilegedport", oUsePrivilegedPort },
211: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 212: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
213: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.50 markus 214: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 215: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.73 markus 216: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 217: { "challengeresponseauthentication", oChallengeResponseAuthentication },
218: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
219: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.17 markus 220: { "identityfile", oIdentityFile },
1.174 stevesk 221: { "identityfile2", oIdentityFile }, /* obsolete */
1.128 markus 222: { "identitiesonly", oIdentitiesOnly },
1.241 djm 223: { "certificatefile", oCertificateFile },
1.246 jcs 224: { "addkeystoagent", oAddKeysToAgent },
1.253 markus 225: { "identityagent", oIdentityAgent },
1.17 markus 226: { "hostname", oHostName },
1.52 markus 227: { "hostkeyalias", oHostKeyAlias },
1.17 markus 228: { "proxycommand", oProxyCommand },
229: { "port", oPort },
1.25 markus 230: { "ciphers", oCiphers },
1.62 markus 231: { "macs", oMacs },
1.17 markus 232: { "remoteforward", oRemoteForward },
233: { "localforward", oLocalForward },
234: { "user", oUser },
235: { "host", oHost },
1.206 djm 236: { "match", oMatch },
1.17 markus 237: { "escapechar", oEscapeChar },
238: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.174 stevesk 239: { "userknownhostsfile", oUserKnownHostsFile },
1.17 markus 240: { "connectionattempts", oConnectionAttempts },
241: { "batchmode", oBatchMode },
242: { "checkhostip", oCheckHostIP },
243: { "stricthostkeychecking", oStrictHostKeyChecking },
244: { "compression", oCompression },
1.126 markus 245: { "tcpkeepalive", oTCPKeepAlive },
246: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 247: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
1.271 dtucker 248: { "syslogfacility", oLogFacility },
1.17 markus 249: { "loglevel", oLogLevel },
1.71 markus 250: { "dynamicforward", oDynamicForward },
1.67 markus 251: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 252: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 253: { "bindaddress", oBindAddress },
1.93 deraadt 254: { "clearallforwardings", oClearAllForwardings },
1.101 markus 255: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 256: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 257: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 258: { "rekeylimit", oRekeyLimit },
1.111 djm 259: { "connecttimeout", oConnectTimeout },
1.112 djm 260: { "addressfamily", oAddressFamily },
1.127 markus 261: { "serveraliveinterval", oServerAliveInterval },
262: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 263: { "sendenv", oSendEnv },
1.132 djm 264: { "controlpath", oControlPath },
265: { "controlmaster", oControlMaster },
1.187 djm 266: { "controlpersist", oControlPersist },
1.136 djm 267: { "hashknownhosts", oHashKnownHosts },
1.252 djm 268: { "include", oInclude },
1.144 reyk 269: { "tunnel", oTunnel },
270: { "tunneldevice", oTunnelDevice },
271: { "localcommand", oLocalCommand },
272: { "permitlocalcommand", oPermitLocalCommand },
1.277 bluhm 273: { "remotecommand", oRemoteCommand },
1.167 grunk 274: { "visualhostkey", oVisualHostKey },
1.189 djm 275: { "kexalgorithms", oKexAlgorithms },
1.190 djm 276: { "ipqos", oIPQoS },
1.192 djm 277: { "requesttty", oRequestTTY },
1.205 djm 278: { "proxyusefdpass", oProxyUseFdpass },
1.208 djm 279: { "canonicaldomains", oCanonicalDomains },
1.209 djm 280: { "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
281: { "canonicalizehostname", oCanonicalizeHostname },
282: { "canonicalizemaxdots", oCanonicalizeMaxDots },
283: { "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
1.220 millert 284: { "streamlocalbindmask", oStreamLocalBindMask },
285: { "streamlocalbindunlink", oStreamLocalBindUnlink },
1.223 djm 286: { "revokedhostkeys", oRevokedHostKeys },
1.224 djm 287: { "fingerprinthash", oFingerprintHash },
1.229 djm 288: { "updatehostkeys", oUpdateHostkeys },
1.230 djm 289: { "hostbasedkeytypes", oHostbasedKeyTypes },
1.238 markus 290: { "pubkeyacceptedkeytypes", oPubkeyAcceptedKeyTypes },
1.199 djm 291: { "ignoreunknown", oIgnoreUnknown },
1.257 djm 292: { "proxyjump", oProxyJump },
1.171 djm 293:
1.92 stevesk 294: { NULL, oBadOption }
1.13 markus 295: };
296:
1.19 markus 297: /*
298: * Adds a local TCP/IP port forward to options. Never returns if there is an
299: * error.
300: */
1.1 deraadt 301:
1.26 markus 302: void
1.220 millert 303: add_local_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 304: {
1.220 millert 305: struct Forward *fwd;
1.17 markus 306: extern uid_t original_real_uid;
1.251 djm 307: int i;
1.185 djm 308:
1.262 jsg 309: if (!bind_permitted(newfwd->listen_port, original_real_uid) &&
1.220 millert 310: newfwd->listen_path == NULL)
1.64 millert 311: fatal("Privileged ports can only be forwarded by root.");
1.251 djm 312: /* Don't add duplicates */
313: for (i = 0; i < options->num_local_forwards; i++) {
314: if (forward_equals(newfwd, options->local_forwards + i))
315: return;
316: }
1.234 deraadt 317: options->local_forwards = xreallocarray(options->local_forwards,
1.185 djm 318: options->num_local_forwards + 1,
319: sizeof(*options->local_forwards));
1.17 markus 320: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 321:
1.172 stevesk 322: fwd->listen_host = newfwd->listen_host;
1.135 djm 323: fwd->listen_port = newfwd->listen_port;
1.220 millert 324: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 325: fwd->connect_host = newfwd->connect_host;
1.135 djm 326: fwd->connect_port = newfwd->connect_port;
1.220 millert 327: fwd->connect_path = newfwd->connect_path;
1.1 deraadt 328: }
329:
1.19 markus 330: /*
331: * Adds a remote TCP/IP port forward to options. Never returns if there is
332: * an error.
333: */
1.1 deraadt 334:
1.26 markus 335: void
1.220 millert 336: add_remote_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 337: {
1.220 millert 338: struct Forward *fwd;
1.251 djm 339: int i;
1.185 djm 340:
1.251 djm 341: /* Don't add duplicates */
342: for (i = 0; i < options->num_remote_forwards; i++) {
343: if (forward_equals(newfwd, options->remote_forwards + i))
344: return;
345: }
1.234 deraadt 346: options->remote_forwards = xreallocarray(options->remote_forwards,
1.185 djm 347: options->num_remote_forwards + 1,
348: sizeof(*options->remote_forwards));
1.17 markus 349: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 350:
1.172 stevesk 351: fwd->listen_host = newfwd->listen_host;
1.135 djm 352: fwd->listen_port = newfwd->listen_port;
1.220 millert 353: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 354: fwd->connect_host = newfwd->connect_host;
1.135 djm 355: fwd->connect_port = newfwd->connect_port;
1.220 millert 356: fwd->connect_path = newfwd->connect_path;
1.194 markus 357: fwd->handle = newfwd->handle;
1.184 markus 358: fwd->allocated_port = 0;
1.1 deraadt 359: }
360:
1.90 stevesk 361: static void
362: clear_forwardings(Options *options)
363: {
364: int i;
365:
1.135 djm 366: for (i = 0; i < options->num_local_forwards; i++) {
1.202 djm 367: free(options->local_forwards[i].listen_host);
1.220 millert 368: free(options->local_forwards[i].listen_path);
1.202 djm 369: free(options->local_forwards[i].connect_host);
1.220 millert 370: free(options->local_forwards[i].connect_path);
1.135 djm 371: }
1.185 djm 372: if (options->num_local_forwards > 0) {
1.202 djm 373: free(options->local_forwards);
1.185 djm 374: options->local_forwards = NULL;
375: }
1.90 stevesk 376: options->num_local_forwards = 0;
1.135 djm 377: for (i = 0; i < options->num_remote_forwards; i++) {
1.202 djm 378: free(options->remote_forwards[i].listen_host);
1.220 millert 379: free(options->remote_forwards[i].listen_path);
1.202 djm 380: free(options->remote_forwards[i].connect_host);
1.220 millert 381: free(options->remote_forwards[i].connect_path);
1.135 djm 382: }
1.185 djm 383: if (options->num_remote_forwards > 0) {
1.202 djm 384: free(options->remote_forwards);
1.185 djm 385: options->remote_forwards = NULL;
386: }
1.90 stevesk 387: options->num_remote_forwards = 0;
1.145 reyk 388: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 389: }
390:
1.195 dtucker 391: void
1.241 djm 392: add_certificate_file(Options *options, const char *path, int userprovided)
393: {
394: int i;
395:
396: if (options->num_certificate_files >= SSH_MAX_CERTIFICATE_FILES)
397: fatal("Too many certificate files specified (max %d)",
398: SSH_MAX_CERTIFICATE_FILES);
399:
400: /* Avoid registering duplicates */
401: for (i = 0; i < options->num_certificate_files; i++) {
402: if (options->certificate_file_userprovided[i] == userprovided &&
403: strcmp(options->certificate_files[i], path) == 0) {
404: debug2("%s: ignoring duplicate key %s", __func__, path);
405: return;
406: }
407: }
408:
409: options->certificate_file_userprovided[options->num_certificate_files] =
410: userprovided;
411: options->certificate_files[options->num_certificate_files++] =
412: xstrdup(path);
413: }
414:
415: void
1.195 dtucker 416: add_identity_file(Options *options, const char *dir, const char *filename,
417: int userprovided)
418: {
419: char *path;
1.219 djm 420: int i;
1.195 dtucker 421:
422: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
423: fatal("Too many identity files specified (max %d)",
424: SSH_MAX_IDENTITY_FILES);
425:
426: if (dir == NULL) /* no dir, filename is absolute */
427: path = xstrdup(filename);
1.276 djm 428: else if (xasprintf(&path, "%s%s", dir, filename) >= PATH_MAX)
429: fatal("Identity file path %s too long", path);
1.219 djm 430:
431: /* Avoid registering duplicates */
432: for (i = 0; i < options->num_identity_files; i++) {
433: if (options->identity_file_userprovided[i] == userprovided &&
434: strcmp(options->identity_files[i], path) == 0) {
435: debug2("%s: ignoring duplicate key %s", __func__, path);
436: free(path);
437: return;
438: }
439: }
1.195 dtucker 440:
441: options->identity_file_userprovided[options->num_identity_files] =
442: userprovided;
443: options->identity_files[options->num_identity_files++] = path;
444: }
445:
1.206 djm 446: int
447: default_ssh_port(void)
448: {
449: static int port;
450: struct servent *sp;
451:
452: if (port == 0) {
453: sp = getservbyname(SSH_SERVICE_NAME, "tcp");
454: port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
455: }
456: return port;
457: }
458:
459: /*
460: * Execute a command in a shell.
461: * Return its exit status or -1 on abnormal exit.
462: */
463: static int
464: execute_in_shell(const char *cmd)
465: {
1.243 dtucker 466: char *shell;
1.206 djm 467: pid_t pid;
468: int devnull, status;
469: extern uid_t original_real_uid;
470:
471: if ((shell = getenv("SHELL")) == NULL)
472: shell = _PATH_BSHELL;
473:
474: /* Need this to redirect subprocess stdin/out */
475: if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
476: fatal("open(/dev/null): %s", strerror(errno));
477:
478: debug("Executing command: '%.500s'", cmd);
479:
480: /* Fork and execute the command. */
481: if ((pid = fork()) == 0) {
1.245 djm 482: char *argv[4];
1.206 djm 483:
484: /* Child. Permanently give up superuser privileges. */
485: permanently_drop_suid(original_real_uid);
486:
487: /* Redirect child stdin and stdout. Leave stderr */
488: if (dup2(devnull, STDIN_FILENO) == -1)
489: fatal("dup2: %s", strerror(errno));
490: if (dup2(devnull, STDOUT_FILENO) == -1)
491: fatal("dup2: %s", strerror(errno));
492: if (devnull > STDERR_FILENO)
493: close(devnull);
494: closefrom(STDERR_FILENO + 1);
1.245 djm 495:
496: argv[0] = shell;
497: argv[1] = "-c";
498: argv[2] = xstrdup(cmd);
499: argv[3] = NULL;
1.206 djm 500:
501: execv(argv[0], argv);
502: error("Unable to execute '%.100s': %s", cmd, strerror(errno));
503: /* Die with signal to make this error apparent to parent. */
504: signal(SIGTERM, SIG_DFL);
505: kill(getpid(), SIGTERM);
506: _exit(1);
507: }
508: /* Parent. */
509: if (pid < 0)
510: fatal("%s: fork: %.100s", __func__, strerror(errno));
511:
512: close(devnull);
513:
514: while (waitpid(pid, &status, 0) == -1) {
515: if (errno != EINTR && errno != EAGAIN)
516: fatal("%s: waitpid: %s", __func__, strerror(errno));
517: }
518: if (!WIFEXITED(status)) {
519: error("command '%.100s' exited abnormally", cmd);
520: return -1;
1.221 djm 521: }
1.206 djm 522: debug3("command returned status %d", WEXITSTATUS(status));
523: return WEXITSTATUS(status);
524: }
525:
526: /*
527: * Parse and execute a Match directive.
528: */
529: static int
530: match_cfg_line(Options *options, char **condition, struct passwd *pw,
1.221 djm 531: const char *host_arg, const char *original_host, int post_canon,
532: const char *filename, int linenum)
1.206 djm 533: {
1.221 djm 534: char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria;
1.211 djm 535: const char *ruser;
1.221 djm 536: int r, port, this_result, result = 1, attributes = 0, negate;
1.206 djm 537: char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
538:
539: /*
540: * Configuration is likely to be incomplete at this point so we
541: * must be prepared to use default values.
542: */
543: port = options->port <= 0 ? default_ssh_port() : options->port;
544: ruser = options->user == NULL ? pw->pw_name : options->user;
1.250 djm 545: if (post_canon) {
546: host = xstrdup(options->hostname);
547: } else if (options->hostname != NULL) {
1.212 djm 548: /* NB. Please keep in sync with ssh.c:main() */
1.211 djm 549: host = percent_expand(options->hostname,
550: "h", host_arg, (char *)NULL);
1.250 djm 551: } else {
1.211 djm 552: host = xstrdup(host_arg);
1.250 djm 553: }
1.206 djm 554:
1.221 djm 555: debug2("checking match for '%s' host %s originally %s",
556: cp, host, original_host);
557: while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') {
558: criteria = NULL;
559: this_result = 1;
560: if ((negate = attrib[0] == '!'))
561: attrib++;
562: /* criteria "all" and "canonical" have no argument */
1.213 dtucker 563: if (strcasecmp(attrib, "all") == 0) {
1.221 djm 564: if (attributes > 1 ||
1.213 dtucker 565: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
1.221 djm 566: error("%.200s line %d: '%s' cannot be combined "
567: "with other Match attributes",
568: filename, linenum, oattrib);
1.213 dtucker 569: result = -1;
570: goto out;
571: }
1.221 djm 572: if (result)
573: result = negate ? 0 : 1;
1.213 dtucker 574: goto out;
575: }
1.221 djm 576: attributes++;
577: if (strcasecmp(attrib, "canonical") == 0) {
578: r = !!post_canon; /* force bitmask member to boolean */
579: if (r == (negate ? 1 : 0))
580: this_result = result = 0;
581: debug3("%.200s line %d: %smatched '%s'",
582: filename, linenum,
583: this_result ? "" : "not ", oattrib);
584: continue;
585: }
586: /* All other criteria require an argument */
1.206 djm 587: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
588: error("Missing Match criteria for %s", attrib);
1.211 djm 589: result = -1;
590: goto out;
1.206 djm 591: }
592: if (strcasecmp(attrib, "host") == 0) {
1.221 djm 593: criteria = xstrdup(host);
1.235 djm 594: r = match_hostname(host, arg) == 1;
1.221 djm 595: if (r == (negate ? 1 : 0))
596: this_result = result = 0;
1.206 djm 597: } else if (strcasecmp(attrib, "originalhost") == 0) {
1.221 djm 598: criteria = xstrdup(original_host);
1.235 djm 599: r = match_hostname(original_host, arg) == 1;
1.221 djm 600: if (r == (negate ? 1 : 0))
601: this_result = result = 0;
1.206 djm 602: } else if (strcasecmp(attrib, "user") == 0) {
1.221 djm 603: criteria = xstrdup(ruser);
1.235 djm 604: r = match_pattern_list(ruser, arg, 0) == 1;
1.221 djm 605: if (r == (negate ? 1 : 0))
606: this_result = result = 0;
1.206 djm 607: } else if (strcasecmp(attrib, "localuser") == 0) {
1.221 djm 608: criteria = xstrdup(pw->pw_name);
1.235 djm 609: r = match_pattern_list(pw->pw_name, arg, 0) == 1;
1.221 djm 610: if (r == (negate ? 1 : 0))
611: this_result = result = 0;
1.210 djm 612: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 613: if (gethostname(thishost, sizeof(thishost)) == -1)
614: fatal("gethostname: %s", strerror(errno));
615: strlcpy(shorthost, thishost, sizeof(shorthost));
616: shorthost[strcspn(thishost, ".")] = '\0';
617: snprintf(portstr, sizeof(portstr), "%d", port);
618:
619: cmd = percent_expand(arg,
620: "L", shorthost,
621: "d", pw->pw_dir,
622: "h", host,
623: "l", thishost,
1.221 djm 624: "n", original_host,
1.206 djm 625: "p", portstr,
626: "r", ruser,
627: "u", pw->pw_name,
628: (char *)NULL);
1.217 djm 629: if (result != 1) {
630: /* skip execution if prior predicate failed */
1.221 djm 631: debug3("%.200s line %d: skipped exec "
632: "\"%.100s\"", filename, linenum, cmd);
633: free(cmd);
634: continue;
635: }
636: r = execute_in_shell(cmd);
637: if (r == -1) {
638: fatal("%.200s line %d: match exec "
639: "'%.100s' error", filename,
640: linenum, cmd);
1.217 djm 641: }
1.221 djm 642: criteria = xstrdup(cmd);
1.206 djm 643: free(cmd);
1.221 djm 644: /* Force exit status to boolean */
645: r = r == 0;
646: if (r == (negate ? 1 : 0))
647: this_result = result = 0;
1.206 djm 648: } else {
649: error("Unsupported Match attribute %s", attrib);
1.211 djm 650: result = -1;
651: goto out;
1.206 djm 652: }
1.221 djm 653: debug3("%.200s line %d: %smatched '%s \"%.100s\"' ",
654: filename, linenum, this_result ? "": "not ",
655: oattrib, criteria);
656: free(criteria);
1.213 dtucker 657: }
658: if (attributes == 0) {
659: error("One or more attributes required for Match");
660: result = -1;
661: goto out;
1.206 djm 662: }
1.221 djm 663: out:
664: if (result != -1)
665: debug2("match %sfound", result ? "" : "not ");
1.206 djm 666: *condition = cp;
1.211 djm 667: free(host);
1.206 djm 668: return result;
669: }
670:
1.208 djm 671: /* Check and prepare a domain name: removes trailing '.' and lowercases */
672: static void
673: valid_domain(char *name, const char *filename, int linenum)
674: {
675: size_t i, l = strlen(name);
676: u_char c, last = '\0';
677:
678: if (l == 0)
679: fatal("%s line %d: empty hostname suffix", filename, linenum);
680: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
681: fatal("%s line %d: hostname suffix \"%.100s\" "
682: "starts with invalid character", filename, linenum, name);
683: for (i = 0; i < l; i++) {
684: c = tolower((u_char)name[i]);
685: name[i] = (char)c;
686: if (last == '.' && c == '.')
687: fatal("%s line %d: hostname suffix \"%.100s\" contains "
688: "consecutive separators", filename, linenum, name);
689: if (c != '.' && c != '-' && !isalnum(c) &&
690: c != '_') /* technically invalid, but common */
691: fatal("%s line %d: hostname suffix \"%.100s\" contains "
692: "invalid characters", filename, linenum, name);
693: last = c;
694: }
695: if (name[l - 1] == '.')
696: name[l - 1] = '\0';
697: }
698:
1.19 markus 699: /*
1.70 stevesk 700: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 701: */
1.26 markus 702: static OpCodes
1.199 djm 703: parse_token(const char *cp, const char *filename, int linenum,
704: const char *ignored_unknown)
1.1 deraadt 705: {
1.199 djm 706: int i;
1.1 deraadt 707:
1.17 markus 708: for (i = 0; keywords[i].name; i++)
1.199 djm 709: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 710: return keywords[i].opcode;
1.235 djm 711: if (ignored_unknown != NULL &&
712: match_pattern_list(cp, ignored_unknown, 1) == 1)
1.199 djm 713: return oIgnoredUnknownOption;
1.75 stevesk 714: error("%s: line %d: Bad configuration option: %s",
715: filename, linenum, cp);
1.17 markus 716: return oBadOption;
1.1 deraadt 717: }
718:
1.207 djm 719: /* Multistate option parsing */
720: struct multistate {
721: char *key;
722: int value;
723: };
724: static const struct multistate multistate_flag[] = {
725: { "true", 1 },
726: { "false", 0 },
727: { "yes", 1 },
728: { "no", 0 },
729: { NULL, -1 }
730: };
731: static const struct multistate multistate_yesnoask[] = {
732: { "true", 1 },
733: { "false", 0 },
734: { "yes", 1 },
735: { "no", 0 },
736: { "ask", 2 },
737: { NULL, -1 }
738: };
1.278 djm 739: static const struct multistate multistate_strict_hostkey[] = {
740: { "true", SSH_STRICT_HOSTKEY_YES },
741: { "false", SSH_STRICT_HOSTKEY_OFF },
742: { "yes", SSH_STRICT_HOSTKEY_YES },
743: { "no", SSH_STRICT_HOSTKEY_OFF },
744: { "ask", SSH_STRICT_HOSTKEY_ASK },
745: { "off", SSH_STRICT_HOSTKEY_OFF },
746: { "accept-new", SSH_STRICT_HOSTKEY_NEW },
747: { NULL, -1 }
748: };
1.246 jcs 749: static const struct multistate multistate_yesnoaskconfirm[] = {
750: { "true", 1 },
751: { "false", 0 },
752: { "yes", 1 },
753: { "no", 0 },
754: { "ask", 2 },
755: { "confirm", 3 },
756: { NULL, -1 }
757: };
1.207 djm 758: static const struct multistate multistate_addressfamily[] = {
759: { "inet", AF_INET },
760: { "inet6", AF_INET6 },
761: { "any", AF_UNSPEC },
762: { NULL, -1 }
763: };
764: static const struct multistate multistate_controlmaster[] = {
765: { "true", SSHCTL_MASTER_YES },
766: { "yes", SSHCTL_MASTER_YES },
767: { "false", SSHCTL_MASTER_NO },
768: { "no", SSHCTL_MASTER_NO },
769: { "auto", SSHCTL_MASTER_AUTO },
770: { "ask", SSHCTL_MASTER_ASK },
771: { "autoask", SSHCTL_MASTER_AUTO_ASK },
772: { NULL, -1 }
773: };
774: static const struct multistate multistate_tunnel[] = {
775: { "ethernet", SSH_TUNMODE_ETHERNET },
776: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
777: { "true", SSH_TUNMODE_DEFAULT },
778: { "yes", SSH_TUNMODE_DEFAULT },
779: { "false", SSH_TUNMODE_NO },
780: { "no", SSH_TUNMODE_NO },
781: { NULL, -1 }
782: };
783: static const struct multistate multistate_requesttty[] = {
784: { "true", REQUEST_TTY_YES },
785: { "yes", REQUEST_TTY_YES },
786: { "false", REQUEST_TTY_NO },
787: { "no", REQUEST_TTY_NO },
788: { "force", REQUEST_TTY_FORCE },
789: { "auto", REQUEST_TTY_AUTO },
790: { NULL, -1 }
791: };
1.209 djm 792: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 793: { "true", SSH_CANONICALISE_YES },
794: { "false", SSH_CANONICALISE_NO },
795: { "yes", SSH_CANONICALISE_YES },
796: { "no", SSH_CANONICALISE_NO },
797: { "always", SSH_CANONICALISE_ALWAYS },
798: { NULL, -1 }
799: };
1.207 djm 800:
1.19 markus 801: /*
802: * Processes a single option line as used in the configuration files. This
803: * only sets those values that have not already been set.
804: */
1.14 markus 805: int
1.206 djm 806: process_config_line(Options *options, struct passwd *pw, const char *host,
1.221 djm 807: const char *original_host, char *line, const char *filename,
808: int linenum, int *activep, int flags)
1.1 deraadt 809: {
1.252 djm 810: return process_config_line_depth(options, pw, host, original_host,
811: line, filename, linenum, activep, flags, 0);
812: }
813:
814: #define WHITESPACE " \t\r\n"
815: static int
816: process_config_line_depth(Options *options, struct passwd *pw, const char *host,
817: const char *original_host, char *line, const char *filename,
818: int linenum, int *activep, int flags, int depth)
819: {
1.193 djm 820: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
821: char **cpptr, fwdarg[256];
1.199 djm 822: u_int i, *uintptr, max_entries = 0;
1.252 djm 823: int r, oactive, negated, opcode, *intptr, value, value2, cmdline = 0;
1.279 ! markus 824: int remotefwd, dynamicfwd;
1.164 dtucker 825: LogLevel *log_level_ptr;
1.271 dtucker 826: SyslogFacility *log_facility_ptr;
1.201 dtucker 827: long long val64;
1.102 markus 828: size_t len;
1.220 millert 829: struct Forward fwd;
1.207 djm 830: const struct multistate *multistate_ptr;
1.208 djm 831: struct allowed_cname *cname;
1.252 djm 832: glob_t gl;
1.106 djm 833:
1.206 djm 834: if (activep == NULL) { /* We are processing a command line directive */
835: cmdline = 1;
836: activep = &cmdline;
837: }
838:
1.267 djm 839: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1.233 djm 840: if ((len = strlen(line)) == 0)
841: return 0;
842: for (len--; len > 0; len--) {
1.267 djm 843: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1.106 djm 844: break;
845: line[len] = '\0';
846: }
1.1 deraadt 847:
1.42 provos 848: s = line;
849: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 850: if ((keyword = strdelim(&s)) == NULL)
851: return 0;
1.42 provos 852: /* Ignore leading whitespace. */
853: if (*keyword == '\0')
1.43 markus 854: keyword = strdelim(&s);
1.56 deraadt 855: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 856: return 0;
1.199 djm 857: /* Match lowercase keyword */
1.207 djm 858: lowercase(keyword);
1.17 markus 859:
1.199 djm 860: opcode = parse_token(keyword, filename, linenum,
861: options->ignored_unknown);
1.17 markus 862:
863: switch (opcode) {
864: case oBadOption:
1.19 markus 865: /* don't panic, but count bad options */
866: return -1;
1.273 djm 867: case oIgnore:
868: return 0;
1.199 djm 869: case oIgnoredUnknownOption:
870: debug("%s line %d: Ignored unknown option \"%s\"",
871: filename, linenum, keyword);
872: return 0;
1.111 djm 873: case oConnectTimeout:
874: intptr = &options->connection_timeout;
1.127 markus 875: parse_time:
1.111 djm 876: arg = strdelim(&s);
877: if (!arg || *arg == '\0')
878: fatal("%s line %d: missing time value.",
879: filename, linenum);
1.221 djm 880: if (strcmp(arg, "none") == 0)
881: value = -1;
882: else if ((value = convtime(arg)) == -1)
1.111 djm 883: fatal("%s line %d: invalid time value.",
884: filename, linenum);
1.160 dtucker 885: if (*activep && *intptr == -1)
1.111 djm 886: *intptr = value;
887: break;
888:
1.17 markus 889: case oForwardAgent:
890: intptr = &options->forward_agent;
1.207 djm 891: parse_flag:
892: multistate_ptr = multistate_flag;
893: parse_multistate:
1.42 provos 894: arg = strdelim(&s);
1.40 ho 895: if (!arg || *arg == '\0')
1.207 djm 896: fatal("%s line %d: missing argument.",
897: filename, linenum);
898: value = -1;
899: for (i = 0; multistate_ptr[i].key != NULL; i++) {
900: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
901: value = multistate_ptr[i].value;
902: break;
903: }
904: }
905: if (value == -1)
906: fatal("%s line %d: unsupported option \"%s\".",
907: filename, linenum, arg);
1.17 markus 908: if (*activep && *intptr == -1)
909: *intptr = value;
910: break;
911:
912: case oForwardX11:
913: intptr = &options->forward_x11;
914: goto parse_flag;
915:
1.123 markus 916: case oForwardX11Trusted:
917: intptr = &options->forward_x11_trusted;
918: goto parse_flag;
1.221 djm 919:
1.186 djm 920: case oForwardX11Timeout:
921: intptr = &options->forward_x11_timeout;
922: goto parse_time;
1.123 markus 923:
1.17 markus 924: case oGatewayPorts:
1.220 millert 925: intptr = &options->fwd_opts.gateway_ports;
1.17 markus 926: goto parse_flag;
927:
1.153 markus 928: case oExitOnForwardFailure:
929: intptr = &options->exit_on_forward_failure;
930: goto parse_flag;
931:
1.17 markus 932: case oUsePrivilegedPort:
933: intptr = &options->use_privileged_port;
934: goto parse_flag;
935:
936: case oPasswordAuthentication:
937: intptr = &options->password_authentication;
938: goto parse_flag;
939:
1.48 markus 940: case oKbdInteractiveAuthentication:
941: intptr = &options->kbd_interactive_authentication;
942: goto parse_flag;
943:
944: case oKbdInteractiveDevices:
945: charptr = &options->kbd_interactive_devices;
946: goto parse_string;
947:
1.50 markus 948: case oPubkeyAuthentication:
949: intptr = &options->pubkey_authentication;
1.30 markus 950: goto parse_flag;
951:
1.72 markus 952: case oHostbasedAuthentication:
953: intptr = &options->hostbased_authentication;
954: goto parse_flag;
955:
1.59 markus 956: case oChallengeResponseAuthentication:
1.78 markus 957: intptr = &options->challenge_response_authentication;
1.17 markus 958: goto parse_flag;
1.108 jakob 959:
1.118 markus 960: case oGssAuthentication:
961: intptr = &options->gss_authentication;
962: goto parse_flag;
963:
964: case oGssDelegateCreds:
965: intptr = &options->gss_deleg_creds;
966: goto parse_flag;
967:
1.17 markus 968: case oBatchMode:
969: intptr = &options->batch_mode;
970: goto parse_flag;
971:
972: case oCheckHostIP:
973: intptr = &options->check_host_ip;
1.167 grunk 974: goto parse_flag;
1.17 markus 975:
1.107 jakob 976: case oVerifyHostKeyDNS:
977: intptr = &options->verify_host_key_dns;
1.207 djm 978: multistate_ptr = multistate_yesnoask;
979: goto parse_multistate;
1.107 jakob 980:
1.17 markus 981: case oStrictHostKeyChecking:
982: intptr = &options->strict_host_key_checking;
1.278 djm 983: multistate_ptr = multistate_strict_hostkey;
1.207 djm 984: goto parse_multistate;
1.17 markus 985:
986: case oCompression:
987: intptr = &options->compression;
988: goto parse_flag;
989:
1.126 markus 990: case oTCPKeepAlive:
991: intptr = &options->tcp_keep_alive;
1.17 markus 992: goto parse_flag;
993:
1.91 markus 994: case oNoHostAuthenticationForLocalhost:
995: intptr = &options->no_host_authentication_for_localhost;
996: goto parse_flag;
997:
1.17 markus 998: case oNumberOfPasswordPrompts:
999: intptr = &options->number_of_password_prompts;
1000: goto parse_int;
1001:
1.105 markus 1002: case oRekeyLimit:
1003: arg = strdelim(&s);
1004: if (!arg || *arg == '\0')
1.198 dtucker 1005: fatal("%.200s line %d: Missing argument.", filename,
1006: linenum);
1007: if (strcmp(arg, "default") == 0) {
1008: val64 = 0;
1009: } else {
1.200 dtucker 1010: if (scan_scaled(arg, &val64) == -1)
1011: fatal("%.200s line %d: Bad number '%s': %s",
1012: filename, linenum, arg, strerror(errno));
1.198 dtucker 1013: if (val64 != 0 && val64 < 16)
1014: fatal("%.200s line %d: RekeyLimit too small",
1015: filename, linenum);
1.105 markus 1016: }
1.165 djm 1017: if (*activep && options->rekey_limit == -1)
1.249 dtucker 1018: options->rekey_limit = val64;
1.198 dtucker 1019: if (s != NULL) { /* optional rekey interval present */
1020: if (strcmp(s, "none") == 0) {
1021: (void)strdelim(&s); /* discard */
1022: break;
1023: }
1024: intptr = &options->rekey_interval;
1025: goto parse_time;
1026: }
1.105 markus 1027: break;
1028:
1.17 markus 1029: case oIdentityFile:
1.42 provos 1030: arg = strdelim(&s);
1.40 ho 1031: if (!arg || *arg == '\0')
1.17 markus 1032: fatal("%.200s line %d: Missing argument.", filename, linenum);
1033: if (*activep) {
1.50 markus 1034: intptr = &options->num_identity_files;
1.27 markus 1035: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 1036: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 1037: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.221 djm 1038: add_identity_file(options, NULL,
1039: arg, flags & SSHCONF_USERCONF);
1.17 markus 1040: }
1041: break;
1042:
1.241 djm 1043: case oCertificateFile:
1044: arg = strdelim(&s);
1045: if (!arg || *arg == '\0')
1046: fatal("%.200s line %d: Missing argument.",
1047: filename, linenum);
1048: if (*activep) {
1049: intptr = &options->num_certificate_files;
1050: if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
1051: fatal("%.200s line %d: Too many certificate "
1052: "files specified (max %d).",
1053: filename, linenum,
1054: SSH_MAX_CERTIFICATE_FILES);
1055: }
1056: add_certificate_file(options, arg,
1057: flags & SSHCONF_USERCONF);
1058: }
1059: break;
1060:
1.34 markus 1061: case oXAuthLocation:
1062: charptr=&options->xauth_location;
1063: goto parse_string;
1064:
1.17 markus 1065: case oUser:
1066: charptr = &options->user;
1067: parse_string:
1.42 provos 1068: arg = strdelim(&s);
1.40 ho 1069: if (!arg || *arg == '\0')
1.193 djm 1070: fatal("%.200s line %d: Missing argument.",
1071: filename, linenum);
1.17 markus 1072: if (*activep && *charptr == NULL)
1.38 provos 1073: *charptr = xstrdup(arg);
1.17 markus 1074: break;
1075:
1076: case oGlobalKnownHostsFile:
1.193 djm 1077: cpptr = (char **)&options->system_hostfiles;
1078: uintptr = &options->num_system_hostfiles;
1079: max_entries = SSH_MAX_HOSTS_FILES;
1080: parse_char_array:
1081: if (*activep && *uintptr == 0) {
1082: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1083: if ((*uintptr) >= max_entries)
1084: fatal("%s line %d: "
1085: "too many authorized keys files.",
1086: filename, linenum);
1087: cpptr[(*uintptr)++] = xstrdup(arg);
1088: }
1089: }
1090: return 0;
1.17 markus 1091:
1092: case oUserKnownHostsFile:
1.193 djm 1093: cpptr = (char **)&options->user_hostfiles;
1094: uintptr = &options->num_user_hostfiles;
1095: max_entries = SSH_MAX_HOSTS_FILES;
1096: goto parse_char_array;
1.27 markus 1097:
1.17 markus 1098: case oHostName:
1099: charptr = &options->hostname;
1100: goto parse_string;
1101:
1.52 markus 1102: case oHostKeyAlias:
1103: charptr = &options->host_key_alias;
1104: goto parse_string;
1105:
1.67 markus 1106: case oPreferredAuthentications:
1107: charptr = &options->preferred_authentications;
1108: goto parse_string;
1109:
1.77 markus 1110: case oBindAddress:
1111: charptr = &options->bind_address;
1112: goto parse_string;
1113:
1.183 markus 1114: case oPKCS11Provider:
1115: charptr = &options->pkcs11_provider;
1.86 markus 1116: goto parse_string;
1.85 jakob 1117:
1.17 markus 1118: case oProxyCommand:
1.144 reyk 1119: charptr = &options->proxy_command;
1.257 djm 1120: /* Ignore ProxyCommand if ProxyJump already specified */
1121: if (options->jump_host != NULL)
1122: charptr = &options->jump_host; /* Skip below */
1.144 reyk 1123: parse_command:
1.113 markus 1124: if (s == NULL)
1125: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 1126: len = strspn(s, WHITESPACE "=");
1.17 markus 1127: if (*activep && *charptr == NULL)
1.102 markus 1128: *charptr = xstrdup(s + len);
1.17 markus 1129: return 0;
1130:
1.257 djm 1131: case oProxyJump:
1132: if (s == NULL) {
1133: fatal("%.200s line %d: Missing argument.",
1134: filename, linenum);
1135: }
1136: len = strspn(s, WHITESPACE "=");
1137: if (parse_jump(s + len, options, *activep) == -1) {
1138: fatal("%.200s line %d: Invalid ProxyJump \"%s\"",
1139: filename, linenum, s + len);
1140: }
1141: return 0;
1142:
1.17 markus 1143: case oPort:
1144: intptr = &options->port;
1145: parse_int:
1.42 provos 1146: arg = strdelim(&s);
1.40 ho 1147: if (!arg || *arg == '\0')
1.17 markus 1148: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1149: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 1150: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 1151:
1152: /* Octal, decimal, or hex format? */
1.38 provos 1153: value = strtol(arg, &endofnumber, 0);
1154: if (arg == endofnumber)
1.21 markus 1155: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 1156: if (*activep && *intptr == -1)
1157: *intptr = value;
1158: break;
1159:
1160: case oConnectionAttempts:
1161: intptr = &options->connection_attempts;
1162: goto parse_int;
1163:
1.25 markus 1164: case oCiphers:
1.42 provos 1165: arg = strdelim(&s);
1.40 ho 1166: if (!arg || *arg == '\0')
1.32 markus 1167: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1168: if (*arg != '-' && !ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.31 markus 1169: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1170: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1171: if (*activep && options->ciphers == NULL)
1.38 provos 1172: options->ciphers = xstrdup(arg);
1.25 markus 1173: break;
1174:
1.62 markus 1175: case oMacs:
1176: arg = strdelim(&s);
1177: if (!arg || *arg == '\0')
1178: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1179: if (*arg != '-' && !mac_valid(*arg == '+' ? arg + 1 : arg))
1.62 markus 1180: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1181: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1182: if (*activep && options->macs == NULL)
1183: options->macs = xstrdup(arg);
1184: break;
1185:
1.189 djm 1186: case oKexAlgorithms:
1187: arg = strdelim(&s);
1188: if (!arg || *arg == '\0')
1189: fatal("%.200s line %d: Missing argument.",
1190: filename, linenum);
1.268 djm 1191: if (*arg != '-' &&
1192: !kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.189 djm 1193: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1194: filename, linenum, arg ? arg : "<NONE>");
1195: if (*activep && options->kex_algorithms == NULL)
1196: options->kex_algorithms = xstrdup(arg);
1197: break;
1198:
1.76 markus 1199: case oHostKeyAlgorithms:
1.238 markus 1200: charptr = &options->hostkeyalgorithms;
1201: parse_keytypes:
1.76 markus 1202: arg = strdelim(&s);
1203: if (!arg || *arg == '\0')
1.238 markus 1204: fatal("%.200s line %d: Missing argument.",
1205: filename, linenum);
1.268 djm 1206: if (*arg != '-' &&
1207: !sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.238 markus 1208: fatal("%s line %d: Bad key types '%s'.",
1209: filename, linenum, arg ? arg : "<NONE>");
1210: if (*activep && *charptr == NULL)
1211: *charptr = xstrdup(arg);
1.76 markus 1212: break;
1213:
1.17 markus 1214: case oLogLevel:
1.164 dtucker 1215: log_level_ptr = &options->log_level;
1.42 provos 1216: arg = strdelim(&s);
1.38 provos 1217: value = log_level_number(arg);
1.95 markus 1218: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1219: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1220: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1221: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1222: *log_level_ptr = (LogLevel) value;
1.17 markus 1223: break;
1224:
1.271 dtucker 1225: case oLogFacility:
1226: log_facility_ptr = &options->log_facility;
1227: arg = strdelim(&s);
1228: value = log_facility_number(arg);
1229: if (value == SYSLOG_FACILITY_NOT_SET)
1230: fatal("%.200s line %d: unsupported log facility '%s'",
1231: filename, linenum, arg ? arg : "<NONE>");
1232: if (*log_facility_ptr == -1)
1233: *log_facility_ptr = (SyslogFacility) value;
1234: break;
1235:
1.88 stevesk 1236: case oLocalForward:
1.17 markus 1237: case oRemoteForward:
1.168 stevesk 1238: case oDynamicForward:
1.42 provos 1239: arg = strdelim(&s);
1.135 djm 1240: if (arg == NULL || *arg == '\0')
1.88 stevesk 1241: fatal("%.200s line %d: Missing port argument.",
1242: filename, linenum);
1.135 djm 1243:
1.279 ! markus 1244: remotefwd = (opcode == oRemoteForward);
! 1245: dynamicfwd = (opcode == oDynamicForward);
! 1246:
! 1247: if (!dynamicfwd) {
1.168 stevesk 1248: arg2 = strdelim(&s);
1.279 ! markus 1249: if (arg2 == NULL || *arg2 == '\0') {
! 1250: if (remotefwd)
! 1251: dynamicfwd = 1;
! 1252: else
! 1253: fatal("%.200s line %d: Missing target "
! 1254: "argument.", filename, linenum);
! 1255: } else {
! 1256: /* construct a string for parse_forward */
! 1257: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg,
! 1258: arg2);
! 1259: }
! 1260: }
! 1261: if (dynamicfwd)
1.168 stevesk 1262: strlcpy(fwdarg, arg, sizeof(fwdarg));
1263:
1.279 ! markus 1264: if (parse_forward(&fwd, fwdarg, dynamicfwd, remotefwd) == 0)
1.88 stevesk 1265: fatal("%.200s line %d: Bad forwarding specification.",
1266: filename, linenum);
1.135 djm 1267:
1.88 stevesk 1268: if (*activep) {
1.279 ! markus 1269: if (remotefwd) {
! 1270: add_remote_forward(options, &fwd);
! 1271: } else {
1.135 djm 1272: add_local_forward(options, &fwd);
1.279 ! markus 1273: }
1.88 stevesk 1274: }
1.17 markus 1275: break;
1.71 markus 1276:
1.90 stevesk 1277: case oClearAllForwardings:
1278: intptr = &options->clear_forwardings;
1279: goto parse_flag;
1280:
1.17 markus 1281: case oHost:
1.206 djm 1282: if (cmdline)
1283: fatal("Host directive not supported as a command-line "
1284: "option");
1.17 markus 1285: *activep = 0;
1.191 djm 1286: arg2 = NULL;
1287: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.252 djm 1288: if ((flags & SSHCONF_NEVERMATCH) != 0)
1289: break;
1.191 djm 1290: negated = *arg == '!';
1291: if (negated)
1292: arg++;
1.38 provos 1293: if (match_pattern(host, arg)) {
1.191 djm 1294: if (negated) {
1295: debug("%.200s line %d: Skipping Host "
1296: "block because of negated match "
1297: "for %.100s", filename, linenum,
1298: arg);
1299: *activep = 0;
1300: break;
1301: }
1302: if (!*activep)
1303: arg2 = arg; /* logged below */
1.17 markus 1304: *activep = 1;
1305: }
1.191 djm 1306: }
1307: if (*activep)
1308: debug("%.200s line %d: Applying options for %.100s",
1309: filename, linenum, arg2);
1.42 provos 1310: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1311: return 0;
1312:
1.206 djm 1313: case oMatch:
1314: if (cmdline)
1315: fatal("Host directive not supported as a command-line "
1316: "option");
1.221 djm 1317: value = match_cfg_line(options, &s, pw, host, original_host,
1318: flags & SSHCONF_POSTCANON, filename, linenum);
1.206 djm 1319: if (value < 0)
1320: fatal("%.200s line %d: Bad Match condition", filename,
1321: linenum);
1.252 djm 1322: *activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
1.206 djm 1323: break;
1324:
1.17 markus 1325: case oEscapeChar:
1326: intptr = &options->escape_char;
1.42 provos 1327: arg = strdelim(&s);
1.40 ho 1328: if (!arg || *arg == '\0')
1.17 markus 1329: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.236 djm 1330: if (strcmp(arg, "none") == 0)
1331: value = SSH_ESCAPECHAR_NONE;
1332: else if (arg[1] == '\0')
1333: value = (u_char) arg[0];
1334: else if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1335: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1336: value = (u_char) arg[1] & 31;
1.17 markus 1337: else {
1338: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1339: filename, linenum);
1.17 markus 1340: /* NOTREACHED */
1341: value = 0; /* Avoid compiler warning. */
1342: }
1343: if (*activep && *intptr == -1)
1344: *intptr = value;
1.112 djm 1345: break;
1346:
1347: case oAddressFamily:
1.114 djm 1348: intptr = &options->address_family;
1.207 djm 1349: multistate_ptr = multistate_addressfamily;
1350: goto parse_multistate;
1.17 markus 1351:
1.101 markus 1352: case oEnableSSHKeysign:
1353: intptr = &options->enable_ssh_keysign;
1354: goto parse_flag;
1355:
1.128 markus 1356: case oIdentitiesOnly:
1357: intptr = &options->identities_only;
1358: goto parse_flag;
1359:
1.127 markus 1360: case oServerAliveInterval:
1361: intptr = &options->server_alive_interval;
1362: goto parse_time;
1363:
1364: case oServerAliveCountMax:
1365: intptr = &options->server_alive_count_max;
1366: goto parse_int;
1367:
1.130 djm 1368: case oSendEnv:
1369: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1370: if (strchr(arg, '=') != NULL)
1371: fatal("%s line %d: Invalid environment name.",
1372: filename, linenum);
1.137 djm 1373: if (!*activep)
1374: continue;
1.130 djm 1375: if (options->num_send_env >= MAX_SEND_ENV)
1376: fatal("%s line %d: too many send env.",
1377: filename, linenum);
1378: options->send_env[options->num_send_env++] =
1379: xstrdup(arg);
1380: }
1381: break;
1382:
1.132 djm 1383: case oControlPath:
1384: charptr = &options->control_path;
1385: goto parse_string;
1386:
1387: case oControlMaster:
1388: intptr = &options->control_master;
1.207 djm 1389: multistate_ptr = multistate_controlmaster;
1390: goto parse_multistate;
1.132 djm 1391:
1.187 djm 1392: case oControlPersist:
1393: /* no/false/yes/true, or a time spec */
1394: intptr = &options->control_persist;
1395: arg = strdelim(&s);
1396: if (!arg || *arg == '\0')
1397: fatal("%.200s line %d: Missing ControlPersist"
1398: " argument.", filename, linenum);
1399: value = 0;
1400: value2 = 0; /* timeout */
1401: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1402: value = 0;
1403: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1404: value = 1;
1405: else if ((value2 = convtime(arg)) >= 0)
1406: value = 1;
1407: else
1408: fatal("%.200s line %d: Bad ControlPersist argument.",
1409: filename, linenum);
1410: if (*activep && *intptr == -1) {
1411: *intptr = value;
1412: options->control_persist_timeout = value2;
1413: }
1414: break;
1415:
1.136 djm 1416: case oHashKnownHosts:
1417: intptr = &options->hash_known_hosts;
1418: goto parse_flag;
1419:
1.144 reyk 1420: case oTunnel:
1421: intptr = &options->tun_open;
1.207 djm 1422: multistate_ptr = multistate_tunnel;
1423: goto parse_multistate;
1.144 reyk 1424:
1425: case oTunnelDevice:
1426: arg = strdelim(&s);
1427: if (!arg || *arg == '\0')
1428: fatal("%.200s line %d: Missing argument.", filename, linenum);
1429: value = a2tun(arg, &value2);
1.145 reyk 1430: if (value == SSH_TUNID_ERR)
1.144 reyk 1431: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1432: if (*activep) {
1433: options->tun_local = value;
1434: options->tun_remote = value2;
1435: }
1436: break;
1437:
1438: case oLocalCommand:
1439: charptr = &options->local_command;
1440: goto parse_command;
1441:
1442: case oPermitLocalCommand:
1443: intptr = &options->permit_local_command;
1444: goto parse_flag;
1445:
1.277 bluhm 1446: case oRemoteCommand:
1447: charptr = &options->remote_command;
1448: goto parse_command;
1449:
1.167 grunk 1450: case oVisualHostKey:
1451: intptr = &options->visual_host_key;
1452: goto parse_flag;
1453:
1.252 djm 1454: case oInclude:
1455: if (cmdline)
1456: fatal("Include directive not supported as a "
1457: "command-line option");
1458: value = 0;
1459: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1460: /*
1461: * Ensure all paths are anchored. User configuration
1462: * files may begin with '~/' but system configurations
1463: * must not. If the path is relative, then treat it
1464: * as living in ~/.ssh for user configurations or
1465: * /etc/ssh for system ones.
1466: */
1467: if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0)
1468: fatal("%.200s line %d: bad include path %s.",
1469: filename, linenum, arg);
1470: if (*arg != '/' && *arg != '~') {
1471: xasprintf(&arg2, "%s/%s",
1472: (flags & SSHCONF_USERCONF) ?
1473: "~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
1474: } else
1475: arg2 = xstrdup(arg);
1476: memset(&gl, 0, sizeof(gl));
1477: r = glob(arg2, GLOB_TILDE, NULL, &gl);
1478: if (r == GLOB_NOMATCH) {
1479: debug("%.200s line %d: include %s matched no "
1480: "files",filename, linenum, arg2);
1.269 dtucker 1481: free(arg2);
1.252 djm 1482: continue;
1483: } else if (r != 0 || gl.gl_pathc < 0)
1484: fatal("%.200s line %d: glob failed for %s.",
1485: filename, linenum, arg2);
1486: free(arg2);
1487: oactive = *activep;
1488: for (i = 0; i < (u_int)gl.gl_pathc; i++) {
1489: debug3("%.200s line %d: Including file %s "
1490: "depth %d%s", filename, linenum,
1491: gl.gl_pathv[i], depth,
1492: oactive ? "" : " (parse only)");
1493: r = read_config_file_depth(gl.gl_pathv[i],
1494: pw, host, original_host, options,
1495: flags | SSHCONF_CHECKPERM |
1496: (oactive ? 0 : SSHCONF_NEVERMATCH),
1497: activep, depth + 1);
1.264 djm 1498: if (r != 1 && errno != ENOENT) {
1.263 djm 1499: fatal("Can't open user config file "
1500: "%.100s: %.100s", gl.gl_pathv[i],
1501: strerror(errno));
1502: }
1.252 djm 1503: /*
1504: * don't let Match in includes clobber the
1505: * containing file's Match state.
1506: */
1507: *activep = oactive;
1508: if (r != 1)
1509: value = -1;
1510: }
1511: globfree(&gl);
1512: }
1513: if (value != 0)
1514: return value;
1515: break;
1516:
1.190 djm 1517: case oIPQoS:
1518: arg = strdelim(&s);
1519: if ((value = parse_ipqos(arg)) == -1)
1520: fatal("%s line %d: Bad IPQoS value: %s",
1521: filename, linenum, arg);
1522: arg = strdelim(&s);
1523: if (arg == NULL)
1524: value2 = value;
1525: else if ((value2 = parse_ipqos(arg)) == -1)
1526: fatal("%s line %d: Bad IPQoS value: %s",
1527: filename, linenum, arg);
1528: if (*activep) {
1529: options->ip_qos_interactive = value;
1530: options->ip_qos_bulk = value2;
1531: }
1532: break;
1533:
1.192 djm 1534: case oRequestTTY:
1535: intptr = &options->request_tty;
1.207 djm 1536: multistate_ptr = multistate_requesttty;
1537: goto parse_multistate;
1.192 djm 1538:
1.199 djm 1539: case oIgnoreUnknown:
1540: charptr = &options->ignored_unknown;
1541: goto parse_string;
1542:
1.205 djm 1543: case oProxyUseFdpass:
1544: intptr = &options->proxy_use_fdpass;
1545: goto parse_flag;
1546:
1.208 djm 1547: case oCanonicalDomains:
1548: value = options->num_canonical_domains != 0;
1549: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1550: valid_domain(arg, filename, linenum);
1551: if (!*activep || value)
1552: continue;
1553: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1554: fatal("%s line %d: too many hostname suffixes.",
1555: filename, linenum);
1556: options->canonical_domains[
1557: options->num_canonical_domains++] = xstrdup(arg);
1558: }
1559: break;
1560:
1.209 djm 1561: case oCanonicalizePermittedCNAMEs:
1.208 djm 1562: value = options->num_permitted_cnames != 0;
1563: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1564: /* Either '*' for everything or 'list:list' */
1565: if (strcmp(arg, "*") == 0)
1566: arg2 = arg;
1567: else {
1568: lowercase(arg);
1569: if ((arg2 = strchr(arg, ':')) == NULL ||
1570: arg2[1] == '\0') {
1571: fatal("%s line %d: "
1572: "Invalid permitted CNAME \"%s\"",
1573: filename, linenum, arg);
1574: }
1575: *arg2 = '\0';
1576: arg2++;
1577: }
1578: if (!*activep || value)
1579: continue;
1580: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1581: fatal("%s line %d: too many permitted CNAMEs.",
1582: filename, linenum);
1583: cname = options->permitted_cnames +
1584: options->num_permitted_cnames++;
1585: cname->source_list = xstrdup(arg);
1586: cname->target_list = xstrdup(arg2);
1587: }
1588: break;
1589:
1.209 djm 1590: case oCanonicalizeHostname:
1591: intptr = &options->canonicalize_hostname;
1592: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1593: goto parse_multistate;
1594:
1.209 djm 1595: case oCanonicalizeMaxDots:
1596: intptr = &options->canonicalize_max_dots;
1.208 djm 1597: goto parse_int;
1598:
1.209 djm 1599: case oCanonicalizeFallbackLocal:
1600: intptr = &options->canonicalize_fallback_local;
1.208 djm 1601: goto parse_flag;
1602:
1.220 millert 1603: case oStreamLocalBindMask:
1604: arg = strdelim(&s);
1605: if (!arg || *arg == '\0')
1606: fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum);
1607: /* Parse mode in octal format */
1608: value = strtol(arg, &endofnumber, 8);
1609: if (arg == endofnumber || value < 0 || value > 0777)
1610: fatal("%.200s line %d: Bad mask.", filename, linenum);
1611: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1612: break;
1613:
1614: case oStreamLocalBindUnlink:
1615: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1616: goto parse_flag;
1617:
1.223 djm 1618: case oRevokedHostKeys:
1619: charptr = &options->revoked_host_keys;
1620: goto parse_string;
1621:
1.224 djm 1622: case oFingerprintHash:
1.225 djm 1623: intptr = &options->fingerprint_hash;
1.224 djm 1624: arg = strdelim(&s);
1625: if (!arg || *arg == '\0')
1626: fatal("%.200s line %d: Missing argument.",
1627: filename, linenum);
1628: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1629: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1630: filename, linenum, arg);
1.225 djm 1631: if (*activep && *intptr == -1)
1632: *intptr = value;
1.224 djm 1633: break;
1634:
1.229 djm 1635: case oUpdateHostkeys:
1636: intptr = &options->update_hostkeys;
1.232 djm 1637: multistate_ptr = multistate_yesnoask;
1638: goto parse_multistate;
1.229 djm 1639:
1.230 djm 1640: case oHostbasedKeyTypes:
1641: charptr = &options->hostbased_key_types;
1.238 markus 1642: goto parse_keytypes;
1643:
1644: case oPubkeyAcceptedKeyTypes:
1645: charptr = &options->pubkey_key_types;
1646: goto parse_keytypes;
1.230 djm 1647:
1.246 jcs 1648: case oAddKeysToAgent:
1649: intptr = &options->add_keys_to_agent;
1650: multistate_ptr = multistate_yesnoaskconfirm;
1651: goto parse_multistate;
1652:
1.253 markus 1653: case oIdentityAgent:
1654: charptr = &options->identity_agent;
1655: goto parse_string;
1656:
1.96 markus 1657: case oDeprecated:
1.98 markus 1658: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1659: filename, linenum, keyword);
1.98 markus 1660: return 0;
1.96 markus 1661:
1.110 jakob 1662: case oUnsupported:
1663: error("%s line %d: Unsupported option \"%s\"",
1664: filename, linenum, keyword);
1665: return 0;
1666:
1.17 markus 1667: default:
1.221 djm 1668: fatal("%s: Unimplemented opcode %d", __func__, opcode);
1.17 markus 1669: }
1670:
1671: /* Check that there is no garbage at end of line. */
1.57 djm 1672: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1673: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1674: filename, linenum, arg);
1.39 ho 1675: }
1.17 markus 1676: return 0;
1.1 deraadt 1677: }
1678:
1.19 markus 1679: /*
1680: * Reads the config file and modifies the options accordingly. Options
1681: * should already be initialized before this call. This never returns if
1.89 stevesk 1682: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1683: */
1.89 stevesk 1684: int
1.206 djm 1685: read_config_file(const char *filename, struct passwd *pw, const char *host,
1.221 djm 1686: const char *original_host, Options *options, int flags)
1.1 deraadt 1687: {
1.252 djm 1688: int active = 1;
1689:
1690: return read_config_file_depth(filename, pw, host, original_host,
1691: options, flags, &active, 0);
1692: }
1693:
1694: #define READCONF_MAX_DEPTH 16
1695: static int
1696: read_config_file_depth(const char *filename, struct passwd *pw,
1697: const char *host, const char *original_host, Options *options,
1698: int flags, int *activep, int depth)
1699: {
1.17 markus 1700: FILE *f;
1.270 djm 1701: char line[4096];
1.252 djm 1702: int linenum;
1.17 markus 1703: int bad_options = 0;
1704:
1.252 djm 1705: if (depth < 0 || depth > READCONF_MAX_DEPTH)
1706: fatal("Too many recursive configuration includes");
1707:
1.129 djm 1708: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1709: return 0;
1.129 djm 1710:
1.196 dtucker 1711: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1712: struct stat sb;
1.134 deraadt 1713:
1.131 dtucker 1714: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1715: fatal("fstat %s: %s", filename, strerror(errno));
1716: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1717: (sb.st_mode & 022) != 0))
1.129 djm 1718: fatal("Bad owner or permissions on %s", filename);
1719: }
1.17 markus 1720:
1721: debug("Reading configuration data %.200s", filename);
1722:
1.19 markus 1723: /*
1724: * Mark that we are now processing the options. This flag is turned
1725: * on/off by Host specifications.
1726: */
1.17 markus 1727: linenum = 0;
1728: while (fgets(line, sizeof(line), f)) {
1729: /* Update line number counter. */
1730: linenum++;
1.270 djm 1731: if (strlen(line) == sizeof(line) - 1)
1732: fatal("%s line %d too long", filename, linenum);
1.252 djm 1733: if (process_config_line_depth(options, pw, host, original_host,
1734: line, filename, linenum, activep, flags, depth) != 0)
1.17 markus 1735: bad_options++;
1736: }
1737: fclose(f);
1738: if (bad_options > 0)
1.64 millert 1739: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1740: filename, bad_options);
1.89 stevesk 1741: return 1;
1.1 deraadt 1742: }
1743:
1.218 djm 1744: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1745: int
1746: option_clear_or_none(const char *o)
1747: {
1748: return o == NULL || strcasecmp(o, "none") == 0;
1749: }
1750:
1.19 markus 1751: /*
1752: * Initializes options to special values that indicate that they have not yet
1753: * been set. Read_config_file will only set options with this value. Options
1754: * are processed in the following order: command line, user config file,
1755: * system config file. Last, fill_default_options is called.
1756: */
1.1 deraadt 1757:
1.26 markus 1758: void
1.17 markus 1759: initialize_options(Options * options)
1.1 deraadt 1760: {
1.17 markus 1761: memset(options, 'X', sizeof(*options));
1762: options->forward_agent = -1;
1763: options->forward_x11 = -1;
1.123 markus 1764: options->forward_x11_trusted = -1;
1.186 djm 1765: options->forward_x11_timeout = -1;
1.255 dtucker 1766: options->stdio_forward_host = NULL;
1767: options->stdio_forward_port = 0;
1.256 dtucker 1768: options->clear_forwardings = -1;
1.153 markus 1769: options->exit_on_forward_failure = -1;
1.34 markus 1770: options->xauth_location = NULL;
1.220 millert 1771: options->fwd_opts.gateway_ports = -1;
1772: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
1773: options->fwd_opts.streamlocal_bind_unlink = -1;
1.17 markus 1774: options->use_privileged_port = -1;
1.50 markus 1775: options->pubkey_authentication = -1;
1.78 markus 1776: options->challenge_response_authentication = -1;
1.118 markus 1777: options->gss_authentication = -1;
1778: options->gss_deleg_creds = -1;
1.17 markus 1779: options->password_authentication = -1;
1.48 markus 1780: options->kbd_interactive_authentication = -1;
1781: options->kbd_interactive_devices = NULL;
1.72 markus 1782: options->hostbased_authentication = -1;
1.17 markus 1783: options->batch_mode = -1;
1784: options->check_host_ip = -1;
1785: options->strict_host_key_checking = -1;
1786: options->compression = -1;
1.126 markus 1787: options->tcp_keep_alive = -1;
1.17 markus 1788: options->port = -1;
1.114 djm 1789: options->address_family = -1;
1.17 markus 1790: options->connection_attempts = -1;
1.111 djm 1791: options->connection_timeout = -1;
1.17 markus 1792: options->number_of_password_prompts = -1;
1.25 markus 1793: options->ciphers = NULL;
1.62 markus 1794: options->macs = NULL;
1.189 djm 1795: options->kex_algorithms = NULL;
1.76 markus 1796: options->hostkeyalgorithms = NULL;
1.17 markus 1797: options->num_identity_files = 0;
1.241 djm 1798: options->num_certificate_files = 0;
1.17 markus 1799: options->hostname = NULL;
1.52 markus 1800: options->host_key_alias = NULL;
1.17 markus 1801: options->proxy_command = NULL;
1.257 djm 1802: options->jump_user = NULL;
1803: options->jump_host = NULL;
1804: options->jump_port = -1;
1805: options->jump_extra = NULL;
1.17 markus 1806: options->user = NULL;
1807: options->escape_char = -1;
1.193 djm 1808: options->num_system_hostfiles = 0;
1809: options->num_user_hostfiles = 0;
1.185 djm 1810: options->local_forwards = NULL;
1.17 markus 1811: options->num_local_forwards = 0;
1.185 djm 1812: options->remote_forwards = NULL;
1.17 markus 1813: options->num_remote_forwards = 0;
1.271 dtucker 1814: options->log_facility = SYSLOG_FACILITY_NOT_SET;
1.95 markus 1815: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1816: options->preferred_authentications = NULL;
1.77 markus 1817: options->bind_address = NULL;
1.183 markus 1818: options->pkcs11_provider = NULL;
1.101 markus 1819: options->enable_ssh_keysign = - 1;
1.91 markus 1820: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1821: options->identities_only = - 1;
1.105 markus 1822: options->rekey_limit = - 1;
1.198 dtucker 1823: options->rekey_interval = -1;
1.107 jakob 1824: options->verify_host_key_dns = -1;
1.127 markus 1825: options->server_alive_interval = -1;
1826: options->server_alive_count_max = -1;
1.130 djm 1827: options->num_send_env = 0;
1.132 djm 1828: options->control_path = NULL;
1829: options->control_master = -1;
1.187 djm 1830: options->control_persist = -1;
1831: options->control_persist_timeout = 0;
1.136 djm 1832: options->hash_known_hosts = -1;
1.144 reyk 1833: options->tun_open = -1;
1834: options->tun_local = -1;
1835: options->tun_remote = -1;
1836: options->local_command = NULL;
1837: options->permit_local_command = -1;
1.277 bluhm 1838: options->remote_command = NULL;
1.246 jcs 1839: options->add_keys_to_agent = -1;
1.253 markus 1840: options->identity_agent = NULL;
1.167 grunk 1841: options->visual_host_key = -1;
1.190 djm 1842: options->ip_qos_interactive = -1;
1843: options->ip_qos_bulk = -1;
1.192 djm 1844: options->request_tty = -1;
1.205 djm 1845: options->proxy_use_fdpass = -1;
1.199 djm 1846: options->ignored_unknown = NULL;
1.208 djm 1847: options->num_canonical_domains = 0;
1848: options->num_permitted_cnames = 0;
1.209 djm 1849: options->canonicalize_max_dots = -1;
1850: options->canonicalize_fallback_local = -1;
1851: options->canonicalize_hostname = -1;
1.223 djm 1852: options->revoked_host_keys = NULL;
1.224 djm 1853: options->fingerprint_hash = -1;
1.229 djm 1854: options->update_hostkeys = -1;
1.230 djm 1855: options->hostbased_key_types = NULL;
1.238 markus 1856: options->pubkey_key_types = NULL;
1.1 deraadt 1857: }
1858:
1.19 markus 1859: /*
1.218 djm 1860: * A petite version of fill_default_options() that just fills the options
1861: * needed for hostname canonicalization to proceed.
1862: */
1863: void
1864: fill_default_options_for_canonicalization(Options *options)
1865: {
1866: if (options->canonicalize_max_dots == -1)
1867: options->canonicalize_max_dots = 1;
1868: if (options->canonicalize_fallback_local == -1)
1869: options->canonicalize_fallback_local = 1;
1870: if (options->canonicalize_hostname == -1)
1871: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1872: }
1873:
1874: /*
1.19 markus 1875: * Called after processing other sources of option data, this fills those
1876: * options for which no value has been specified with their default values.
1877: */
1.26 markus 1878: void
1.17 markus 1879: fill_default_options(Options * options)
1.1 deraadt 1880: {
1.17 markus 1881: if (options->forward_agent == -1)
1.33 markus 1882: options->forward_agent = 0;
1.17 markus 1883: if (options->forward_x11 == -1)
1.23 markus 1884: options->forward_x11 = 0;
1.123 markus 1885: if (options->forward_x11_trusted == -1)
1886: options->forward_x11_trusted = 0;
1.186 djm 1887: if (options->forward_x11_timeout == -1)
1888: options->forward_x11_timeout = 1200;
1.256 dtucker 1889: /*
1890: * stdio forwarding (-W) changes the default for these but we defer
1891: * setting the values so they can be overridden.
1892: */
1.153 markus 1893: if (options->exit_on_forward_failure == -1)
1.256 dtucker 1894: options->exit_on_forward_failure =
1895: options->stdio_forward_host != NULL ? 1 : 0;
1896: if (options->clear_forwardings == -1)
1897: options->clear_forwardings =
1898: options->stdio_forward_host != NULL ? 1 : 0;
1899: if (options->clear_forwardings == 1)
1900: clear_forwardings(options);
1901:
1.34 markus 1902: if (options->xauth_location == NULL)
1.80 markus 1903: options->xauth_location = _PATH_XAUTH;
1.220 millert 1904: if (options->fwd_opts.gateway_ports == -1)
1905: options->fwd_opts.gateway_ports = 0;
1906: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
1907: options->fwd_opts.streamlocal_bind_mask = 0177;
1908: if (options->fwd_opts.streamlocal_bind_unlink == -1)
1909: options->fwd_opts.streamlocal_bind_unlink = 0;
1.17 markus 1910: if (options->use_privileged_port == -1)
1.65 markus 1911: options->use_privileged_port = 0;
1.50 markus 1912: if (options->pubkey_authentication == -1)
1913: options->pubkey_authentication = 1;
1.78 markus 1914: if (options->challenge_response_authentication == -1)
1.83 markus 1915: options->challenge_response_authentication = 1;
1.118 markus 1916: if (options->gss_authentication == -1)
1.122 markus 1917: options->gss_authentication = 0;
1.118 markus 1918: if (options->gss_deleg_creds == -1)
1919: options->gss_deleg_creds = 0;
1.17 markus 1920: if (options->password_authentication == -1)
1921: options->password_authentication = 1;
1.48 markus 1922: if (options->kbd_interactive_authentication == -1)
1.59 markus 1923: options->kbd_interactive_authentication = 1;
1.72 markus 1924: if (options->hostbased_authentication == -1)
1925: options->hostbased_authentication = 0;
1.17 markus 1926: if (options->batch_mode == -1)
1927: options->batch_mode = 0;
1928: if (options->check_host_ip == -1)
1929: options->check_host_ip = 1;
1930: if (options->strict_host_key_checking == -1)
1.278 djm 1931: options->strict_host_key_checking = SSH_STRICT_HOSTKEY_ASK;
1.17 markus 1932: if (options->compression == -1)
1933: options->compression = 0;
1.126 markus 1934: if (options->tcp_keep_alive == -1)
1935: options->tcp_keep_alive = 1;
1.17 markus 1936: if (options->port == -1)
1937: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1938: if (options->address_family == -1)
1939: options->address_family = AF_UNSPEC;
1.17 markus 1940: if (options->connection_attempts == -1)
1.84 markus 1941: options->connection_attempts = 1;
1.17 markus 1942: if (options->number_of_password_prompts == -1)
1943: options->number_of_password_prompts = 3;
1.76 markus 1944: /* options->hostkeyalgorithms, default set in myproposals.h */
1.246 jcs 1945: if (options->add_keys_to_agent == -1)
1946: options->add_keys_to_agent = 0;
1.17 markus 1947: if (options->num_identity_files == 0) {
1.273 djm 1948: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_RSA, 0);
1949: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_DSA, 0);
1950: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_ECDSA, 0);
1951: add_identity_file(options, "~/",
1952: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.27 markus 1953: }
1.17 markus 1954: if (options->escape_char == -1)
1955: options->escape_char = '~';
1.193 djm 1956: if (options->num_system_hostfiles == 0) {
1957: options->system_hostfiles[options->num_system_hostfiles++] =
1958: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1959: options->system_hostfiles[options->num_system_hostfiles++] =
1960: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1961: }
1962: if (options->num_user_hostfiles == 0) {
1963: options->user_hostfiles[options->num_user_hostfiles++] =
1964: xstrdup(_PATH_SSH_USER_HOSTFILE);
1965: options->user_hostfiles[options->num_user_hostfiles++] =
1966: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1967: }
1.95 markus 1968: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1969: options->log_level = SYSLOG_LEVEL_INFO;
1.271 dtucker 1970: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1971: options->log_facility = SYSLOG_FACILITY_USER;
1.91 markus 1972: if (options->no_host_authentication_for_localhost == - 1)
1973: options->no_host_authentication_for_localhost = 0;
1.128 markus 1974: if (options->identities_only == -1)
1975: options->identities_only = 0;
1.101 markus 1976: if (options->enable_ssh_keysign == -1)
1977: options->enable_ssh_keysign = 0;
1.105 markus 1978: if (options->rekey_limit == -1)
1979: options->rekey_limit = 0;
1.198 dtucker 1980: if (options->rekey_interval == -1)
1981: options->rekey_interval = 0;
1.107 jakob 1982: if (options->verify_host_key_dns == -1)
1983: options->verify_host_key_dns = 0;
1.127 markus 1984: if (options->server_alive_interval == -1)
1985: options->server_alive_interval = 0;
1986: if (options->server_alive_count_max == -1)
1987: options->server_alive_count_max = 3;
1.132 djm 1988: if (options->control_master == -1)
1989: options->control_master = 0;
1.187 djm 1990: if (options->control_persist == -1) {
1991: options->control_persist = 0;
1992: options->control_persist_timeout = 0;
1993: }
1.136 djm 1994: if (options->hash_known_hosts == -1)
1995: options->hash_known_hosts = 0;
1.144 reyk 1996: if (options->tun_open == -1)
1.145 reyk 1997: options->tun_open = SSH_TUNMODE_NO;
1998: if (options->tun_local == -1)
1999: options->tun_local = SSH_TUNID_ANY;
2000: if (options->tun_remote == -1)
2001: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 2002: if (options->permit_local_command == -1)
2003: options->permit_local_command = 0;
1.167 grunk 2004: if (options->visual_host_key == -1)
2005: options->visual_host_key = 0;
1.190 djm 2006: if (options->ip_qos_interactive == -1)
2007: options->ip_qos_interactive = IPTOS_LOWDELAY;
2008: if (options->ip_qos_bulk == -1)
2009: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 2010: if (options->request_tty == -1)
2011: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 2012: if (options->proxy_use_fdpass == -1)
2013: options->proxy_use_fdpass = 0;
1.209 djm 2014: if (options->canonicalize_max_dots == -1)
2015: options->canonicalize_max_dots = 1;
2016: if (options->canonicalize_fallback_local == -1)
2017: options->canonicalize_fallback_local = 1;
2018: if (options->canonicalize_hostname == -1)
2019: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.224 djm 2020: if (options->fingerprint_hash == -1)
2021: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.229 djm 2022: if (options->update_hostkeys == -1)
1.231 djm 2023: options->update_hostkeys = 0;
1.239 djm 2024: if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 ||
2025: kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 ||
2026: kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 ||
2027: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2028: &options->hostbased_key_types) != 0 ||
2029: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2030: &options->pubkey_key_types) != 0)
2031: fatal("%s: kex_assemble_names failed", __func__);
1.224 djm 2032:
1.207 djm 2033: #define CLEAR_ON_NONE(v) \
2034: do { \
1.218 djm 2035: if (option_clear_or_none(v)) { \
1.207 djm 2036: free(v); \
2037: v = NULL; \
2038: } \
2039: } while(0)
2040: CLEAR_ON_NONE(options->local_command);
1.277 bluhm 2041: CLEAR_ON_NONE(options->remote_command);
1.207 djm 2042: CLEAR_ON_NONE(options->proxy_command);
2043: CLEAR_ON_NONE(options->control_path);
1.223 djm 2044: CLEAR_ON_NONE(options->revoked_host_keys);
1.254 markus 2045: /* options->identity_agent distinguishes NULL from 'none' */
1.17 markus 2046: /* options->user will be set in the main program if appropriate */
2047: /* options->hostname will be set in the main program if appropriate */
1.52 markus 2048: /* options->host_key_alias should not be set by default */
1.67 markus 2049: /* options->preferred_authentications will be set in ssh */
1.135 djm 2050: }
2051:
1.220 millert 2052: struct fwdarg {
2053: char *arg;
2054: int ispath;
2055: };
2056:
2057: /*
2058: * parse_fwd_field
2059: * parses the next field in a port forwarding specification.
2060: * sets fwd to the parsed field and advances p past the colon
2061: * or sets it to NULL at end of string.
2062: * returns 0 on success, else non-zero.
2063: */
2064: static int
2065: parse_fwd_field(char **p, struct fwdarg *fwd)
2066: {
2067: char *ep, *cp = *p;
2068: int ispath = 0;
2069:
2070: if (*cp == '\0') {
2071: *p = NULL;
2072: return -1; /* end of string */
2073: }
2074:
2075: /*
2076: * A field escaped with square brackets is used literally.
2077: * XXX - allow ']' to be escaped via backslash?
2078: */
2079: if (*cp == '[') {
2080: /* find matching ']' */
2081: for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
2082: if (*ep == '/')
2083: ispath = 1;
2084: }
2085: /* no matching ']' or not at end of field. */
2086: if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
2087: return -1;
2088: /* NUL terminate the field and advance p past the colon */
2089: *ep++ = '\0';
2090: if (*ep != '\0')
2091: *ep++ = '\0';
2092: fwd->arg = cp + 1;
2093: fwd->ispath = ispath;
2094: *p = ep;
2095: return 0;
2096: }
2097:
2098: for (cp = *p; *cp != '\0'; cp++) {
2099: switch (*cp) {
2100: case '\\':
2101: memmove(cp, cp + 1, strlen(cp + 1) + 1);
1.237 djm 2102: if (*cp == '\0')
2103: return -1;
1.220 millert 2104: break;
2105: case '/':
2106: ispath = 1;
2107: break;
2108: case ':':
2109: *cp++ = '\0';
2110: goto done;
2111: }
2112: }
2113: done:
2114: fwd->arg = *p;
2115: fwd->ispath = ispath;
2116: *p = cp;
2117: return 0;
2118: }
2119:
1.135 djm 2120: /*
2121: * parse_forward
2122: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 2123: * dynamicfwd == 0
1.220 millert 2124: * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
2125: * listenpath:connectpath
1.168 stevesk 2126: * dynamicfwd == 1
2127: * [listenhost:]listenport
1.135 djm 2128: * returns number of arguments parsed or zero on error
2129: */
2130: int
1.220 millert 2131: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 2132: {
1.220 millert 2133: struct fwdarg fwdargs[4];
2134: char *p, *cp;
1.135 djm 2135: int i;
2136:
1.220 millert 2137: memset(fwd, 0, sizeof(*fwd));
2138: memset(fwdargs, 0, sizeof(fwdargs));
1.135 djm 2139:
2140: cp = p = xstrdup(fwdspec);
2141:
2142: /* skip leading spaces */
1.214 deraadt 2143: while (isspace((u_char)*cp))
1.135 djm 2144: cp++;
2145:
1.220 millert 2146: for (i = 0; i < 4; ++i) {
2147: if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.135 djm 2148: break;
1.220 millert 2149: }
1.135 djm 2150:
1.170 stevesk 2151: /* Check for trailing garbage */
1.220 millert 2152: if (cp != NULL && *cp != '\0') {
1.135 djm 2153: i = 0; /* failure */
1.220 millert 2154: }
1.135 djm 2155:
2156: switch (i) {
1.168 stevesk 2157: case 1:
1.220 millert 2158: if (fwdargs[0].ispath) {
2159: fwd->listen_path = xstrdup(fwdargs[0].arg);
2160: fwd->listen_port = PORT_STREAMLOCAL;
2161: } else {
2162: fwd->listen_host = NULL;
2163: fwd->listen_port = a2port(fwdargs[0].arg);
2164: }
1.168 stevesk 2165: fwd->connect_host = xstrdup("socks");
2166: break;
2167:
2168: case 2:
1.220 millert 2169: if (fwdargs[0].ispath && fwdargs[1].ispath) {
2170: fwd->listen_path = xstrdup(fwdargs[0].arg);
2171: fwd->listen_port = PORT_STREAMLOCAL;
2172: fwd->connect_path = xstrdup(fwdargs[1].arg);
2173: fwd->connect_port = PORT_STREAMLOCAL;
2174: } else if (fwdargs[1].ispath) {
2175: fwd->listen_host = NULL;
2176: fwd->listen_port = a2port(fwdargs[0].arg);
2177: fwd->connect_path = xstrdup(fwdargs[1].arg);
2178: fwd->connect_port = PORT_STREAMLOCAL;
2179: } else {
2180: fwd->listen_host = xstrdup(fwdargs[0].arg);
2181: fwd->listen_port = a2port(fwdargs[1].arg);
2182: fwd->connect_host = xstrdup("socks");
2183: }
1.168 stevesk 2184: break;
2185:
1.135 djm 2186: case 3:
1.220 millert 2187: if (fwdargs[0].ispath) {
2188: fwd->listen_path = xstrdup(fwdargs[0].arg);
2189: fwd->listen_port = PORT_STREAMLOCAL;
2190: fwd->connect_host = xstrdup(fwdargs[1].arg);
2191: fwd->connect_port = a2port(fwdargs[2].arg);
2192: } else if (fwdargs[2].ispath) {
2193: fwd->listen_host = xstrdup(fwdargs[0].arg);
2194: fwd->listen_port = a2port(fwdargs[1].arg);
2195: fwd->connect_path = xstrdup(fwdargs[2].arg);
2196: fwd->connect_port = PORT_STREAMLOCAL;
2197: } else {
2198: fwd->listen_host = NULL;
2199: fwd->listen_port = a2port(fwdargs[0].arg);
2200: fwd->connect_host = xstrdup(fwdargs[1].arg);
2201: fwd->connect_port = a2port(fwdargs[2].arg);
2202: }
1.135 djm 2203: break;
2204:
2205: case 4:
1.220 millert 2206: fwd->listen_host = xstrdup(fwdargs[0].arg);
2207: fwd->listen_port = a2port(fwdargs[1].arg);
2208: fwd->connect_host = xstrdup(fwdargs[2].arg);
2209: fwd->connect_port = a2port(fwdargs[3].arg);
1.135 djm 2210: break;
2211: default:
2212: i = 0; /* failure */
2213: }
2214:
1.202 djm 2215: free(p);
1.135 djm 2216:
1.168 stevesk 2217: if (dynamicfwd) {
2218: if (!(i == 1 || i == 2))
2219: goto fail_free;
2220: } else {
1.220 millert 2221: if (!(i == 3 || i == 4)) {
2222: if (fwd->connect_path == NULL &&
2223: fwd->listen_path == NULL)
2224: goto fail_free;
2225: }
2226: if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.168 stevesk 2227: goto fail_free;
2228: }
2229:
1.220 millert 2230: if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
2231: (!remotefwd && fwd->listen_port == 0))
1.135 djm 2232: goto fail_free;
2233: if (fwd->connect_host != NULL &&
2234: strlen(fwd->connect_host) >= NI_MAXHOST)
2235: goto fail_free;
1.220 millert 2236: /* XXX - if connecting to a remote socket, max sun len may not match this host */
2237: if (fwd->connect_path != NULL &&
2238: strlen(fwd->connect_path) >= PATH_MAX_SUN)
2239: goto fail_free;
1.176 djm 2240: if (fwd->listen_host != NULL &&
2241: strlen(fwd->listen_host) >= NI_MAXHOST)
2242: goto fail_free;
1.220 millert 2243: if (fwd->listen_path != NULL &&
2244: strlen(fwd->listen_path) >= PATH_MAX_SUN)
2245: goto fail_free;
1.135 djm 2246:
2247: return (i);
2248:
2249: fail_free:
1.202 djm 2250: free(fwd->connect_host);
2251: fwd->connect_host = NULL;
1.220 millert 2252: free(fwd->connect_path);
2253: fwd->connect_path = NULL;
1.202 djm 2254: free(fwd->listen_host);
2255: fwd->listen_host = NULL;
1.220 millert 2256: free(fwd->listen_path);
2257: fwd->listen_path = NULL;
1.135 djm 2258: return (0);
1.221 djm 2259: }
2260:
1.257 djm 2261: int
2262: parse_jump(const char *s, Options *o, int active)
2263: {
2264: char *orig, *sdup, *cp;
2265: char *host = NULL, *user = NULL;
1.258 naddy 2266: int ret = -1, port = -1, first;
1.257 djm 2267:
2268: active &= o->proxy_command == NULL && o->jump_host == NULL;
2269:
2270: orig = sdup = xstrdup(s);
1.258 naddy 2271: first = active;
1.259 djm 2272: do {
2273: if ((cp = strrchr(sdup, ',')) == NULL)
2274: cp = sdup; /* last */
2275: else
2276: *cp++ = '\0';
2277:
1.258 naddy 2278: if (first) {
1.257 djm 2279: /* First argument and configuration is active */
2280: if (parse_user_host_port(cp, &user, &host, &port) != 0)
2281: goto out;
2282: } else {
2283: /* Subsequent argument or inactive configuration */
2284: if (parse_user_host_port(cp, NULL, NULL, NULL) != 0)
2285: goto out;
2286: }
1.258 naddy 2287: first = 0; /* only check syntax for subsequent hosts */
1.259 djm 2288: } while (cp != sdup);
1.257 djm 2289: /* success */
1.258 naddy 2290: if (active) {
2291: o->jump_user = user;
2292: o->jump_host = host;
2293: o->jump_port = port;
2294: o->proxy_command = xstrdup("none");
2295: user = host = NULL;
1.259 djm 2296: if ((cp = strrchr(s, ',')) != NULL && cp != s) {
2297: o->jump_extra = xstrdup(s);
2298: o->jump_extra[cp - s] = '\0';
2299: }
1.258 naddy 2300: }
1.257 djm 2301: ret = 0;
2302: out:
1.258 naddy 2303: free(orig);
1.257 djm 2304: free(user);
2305: free(host);
2306: return ret;
2307: }
2308:
1.221 djm 2309: /* XXX the following is a near-vebatim copy from servconf.c; refactor */
2310: static const char *
2311: fmt_multistate_int(int val, const struct multistate *m)
2312: {
2313: u_int i;
2314:
2315: for (i = 0; m[i].key != NULL; i++) {
2316: if (m[i].value == val)
2317: return m[i].key;
2318: }
2319: return "UNKNOWN";
2320: }
2321:
2322: static const char *
2323: fmt_intarg(OpCodes code, int val)
2324: {
2325: if (val == -1)
2326: return "unset";
2327: switch (code) {
2328: case oAddressFamily:
2329: return fmt_multistate_int(val, multistate_addressfamily);
2330: case oVerifyHostKeyDNS:
1.232 djm 2331: case oUpdateHostkeys:
1.221 djm 2332: return fmt_multistate_int(val, multistate_yesnoask);
1.278 djm 2333: case oStrictHostKeyChecking:
2334: return fmt_multistate_int(val, multistate_strict_hostkey);
1.221 djm 2335: case oControlMaster:
2336: return fmt_multistate_int(val, multistate_controlmaster);
2337: case oTunnel:
2338: return fmt_multistate_int(val, multistate_tunnel);
2339: case oRequestTTY:
2340: return fmt_multistate_int(val, multistate_requesttty);
2341: case oCanonicalizeHostname:
2342: return fmt_multistate_int(val, multistate_canonicalizehostname);
1.224 djm 2343: case oFingerprintHash:
2344: return ssh_digest_alg_name(val);
1.221 djm 2345: default:
2346: switch (val) {
2347: case 0:
2348: return "no";
2349: case 1:
2350: return "yes";
2351: default:
2352: return "UNKNOWN";
2353: }
2354: }
2355: }
2356:
2357: static const char *
2358: lookup_opcode_name(OpCodes code)
2359: {
2360: u_int i;
2361:
2362: for (i = 0; keywords[i].name != NULL; i++)
2363: if (keywords[i].opcode == code)
2364: return(keywords[i].name);
2365: return "UNKNOWN";
2366: }
2367:
2368: static void
2369: dump_cfg_int(OpCodes code, int val)
2370: {
2371: printf("%s %d\n", lookup_opcode_name(code), val);
2372: }
2373:
2374: static void
2375: dump_cfg_fmtint(OpCodes code, int val)
2376: {
2377: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2378: }
2379:
2380: static void
2381: dump_cfg_string(OpCodes code, const char *val)
2382: {
2383: if (val == NULL)
2384: return;
2385: printf("%s %s\n", lookup_opcode_name(code), val);
2386: }
2387:
2388: static void
2389: dump_cfg_strarray(OpCodes code, u_int count, char **vals)
2390: {
2391: u_int i;
2392:
2393: for (i = 0; i < count; i++)
2394: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2395: }
2396:
2397: static void
2398: dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
2399: {
2400: u_int i;
2401:
2402: printf("%s", lookup_opcode_name(code));
2403: for (i = 0; i < count; i++)
2404: printf(" %s", vals[i]);
2405: printf("\n");
2406: }
2407:
2408: static void
2409: dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
2410: {
2411: const struct Forward *fwd;
2412: u_int i;
2413:
2414: /* oDynamicForward */
2415: for (i = 0; i < count; i++) {
2416: fwd = &fwds[i];
1.265 djm 2417: if (code == oDynamicForward && fwd->connect_host != NULL &&
1.221 djm 2418: strcmp(fwd->connect_host, "socks") != 0)
2419: continue;
1.265 djm 2420: if (code == oLocalForward && fwd->connect_host != NULL &&
1.221 djm 2421: strcmp(fwd->connect_host, "socks") == 0)
2422: continue;
2423: printf("%s", lookup_opcode_name(code));
2424: if (fwd->listen_port == PORT_STREAMLOCAL)
2425: printf(" %s", fwd->listen_path);
2426: else if (fwd->listen_host == NULL)
2427: printf(" %d", fwd->listen_port);
2428: else {
2429: printf(" [%s]:%d",
2430: fwd->listen_host, fwd->listen_port);
2431: }
2432: if (code != oDynamicForward) {
2433: if (fwd->connect_port == PORT_STREAMLOCAL)
2434: printf(" %s", fwd->connect_path);
2435: else if (fwd->connect_host == NULL)
2436: printf(" %d", fwd->connect_port);
2437: else {
2438: printf(" [%s]:%d",
2439: fwd->connect_host, fwd->connect_port);
2440: }
2441: }
2442: printf("\n");
2443: }
2444: }
2445:
2446: void
2447: dump_client_config(Options *o, const char *host)
2448: {
2449: int i;
1.257 djm 2450: char buf[8];
1.221 djm 2451:
1.240 djm 2452: /* This is normally prepared in ssh_kex2 */
2453: if (kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->hostkeyalgorithms) != 0)
2454: fatal("%s: kex_assemble_names failed", __func__);
2455:
1.221 djm 2456: /* Most interesting options first: user, host, port */
2457: dump_cfg_string(oUser, o->user);
2458: dump_cfg_string(oHostName, host);
2459: dump_cfg_int(oPort, o->port);
2460:
2461: /* Flag options */
2462: dump_cfg_fmtint(oAddressFamily, o->address_family);
2463: dump_cfg_fmtint(oBatchMode, o->batch_mode);
2464: dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
2465: dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
2466: dump_cfg_fmtint(oChallengeResponseAuthentication, o->challenge_response_authentication);
2467: dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
2468: dump_cfg_fmtint(oCompression, o->compression);
2469: dump_cfg_fmtint(oControlMaster, o->control_master);
2470: dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
1.256 dtucker 2471: dump_cfg_fmtint(oClearAllForwardings, o->clear_forwardings);
1.221 djm 2472: dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
1.224 djm 2473: dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
1.221 djm 2474: dump_cfg_fmtint(oForwardAgent, o->forward_agent);
2475: dump_cfg_fmtint(oForwardX11, o->forward_x11);
2476: dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
2477: dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
2478: #ifdef GSSAPI
2479: dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
2480: dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
2481: #endif /* GSSAPI */
2482: dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
2483: dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
2484: dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
2485: dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
2486: dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
2487: dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
2488: dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
2489: dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
2490: dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
2491: dump_cfg_fmtint(oRequestTTY, o->request_tty);
2492: dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
2493: dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
2494: dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
2495: dump_cfg_fmtint(oTunnel, o->tun_open);
2496: dump_cfg_fmtint(oUsePrivilegedPort, o->use_privileged_port);
2497: dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
2498: dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
1.229 djm 2499: dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
1.221 djm 2500:
2501: /* Integer options */
2502: dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
2503: dump_cfg_int(oConnectionAttempts, o->connection_attempts);
2504: dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
2505: dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
2506: dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
2507: dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
2508:
2509: /* String options */
2510: dump_cfg_string(oBindAddress, o->bind_address);
2511: dump_cfg_string(oCiphers, o->ciphers ? o->ciphers : KEX_CLIENT_ENCRYPT);
2512: dump_cfg_string(oControlPath, o->control_path);
1.240 djm 2513: dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
1.221 djm 2514: dump_cfg_string(oHostKeyAlias, o->host_key_alias);
1.230 djm 2515: dump_cfg_string(oHostbasedKeyTypes, o->hostbased_key_types);
1.253 markus 2516: dump_cfg_string(oIdentityAgent, o->identity_agent);
1.221 djm 2517: dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
2518: dump_cfg_string(oKexAlgorithms, o->kex_algorithms ? o->kex_algorithms : KEX_CLIENT_KEX);
2519: dump_cfg_string(oLocalCommand, o->local_command);
1.277 bluhm 2520: dump_cfg_string(oRemoteCommand, o->remote_command);
1.221 djm 2521: dump_cfg_string(oLogLevel, log_level_name(o->log_level));
2522: dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC);
1.266 djm 2523: #ifdef ENABLE_PKCS11
1.221 djm 2524: dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
1.266 djm 2525: #endif
1.221 djm 2526: dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
1.242 djm 2527: dump_cfg_string(oPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.230 djm 2528: dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
1.221 djm 2529: dump_cfg_string(oXAuthLocation, o->xauth_location);
2530:
1.230 djm 2531: /* Forwards */
1.221 djm 2532: dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
2533: dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
2534: dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
2535:
2536: /* String array options */
2537: dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
2538: dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
2539: dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
2540: dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
2541: dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
2542:
2543: /* Special cases */
2544:
2545: /* oConnectTimeout */
2546: if (o->connection_timeout == -1)
2547: printf("connecttimeout none\n");
2548: else
2549: dump_cfg_int(oConnectTimeout, o->connection_timeout);
2550:
2551: /* oTunnelDevice */
2552: printf("tunneldevice");
2553: if (o->tun_local == SSH_TUNID_ANY)
2554: printf(" any");
2555: else
2556: printf(" %d", o->tun_local);
2557: if (o->tun_remote == SSH_TUNID_ANY)
2558: printf(":any");
2559: else
2560: printf(":%d", o->tun_remote);
2561: printf("\n");
2562:
2563: /* oCanonicalizePermittedCNAMEs */
2564: if ( o->num_permitted_cnames > 0) {
2565: printf("canonicalizePermittedcnames");
2566: for (i = 0; i < o->num_permitted_cnames; i++) {
2567: printf(" %s:%s", o->permitted_cnames[i].source_list,
2568: o->permitted_cnames[i].target_list);
2569: }
2570: printf("\n");
2571: }
2572:
2573: /* oControlPersist */
2574: if (o->control_persist == 0 || o->control_persist_timeout == 0)
2575: dump_cfg_fmtint(oControlPersist, o->control_persist);
2576: else
2577: dump_cfg_int(oControlPersist, o->control_persist_timeout);
2578:
2579: /* oEscapeChar */
2580: if (o->escape_char == SSH_ESCAPECHAR_NONE)
2581: printf("escapechar none\n");
2582: else {
1.257 djm 2583: vis(buf, o->escape_char, VIS_WHITE, 0);
2584: printf("escapechar %s\n", buf);
1.221 djm 2585: }
2586:
2587: /* oIPQoS */
2588: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2589: printf("%s\n", iptos2str(o->ip_qos_bulk));
2590:
2591: /* oRekeyLimit */
1.249 dtucker 2592: printf("rekeylimit %llu %d\n",
2593: (unsigned long long)o->rekey_limit, o->rekey_interval);
1.221 djm 2594:
2595: /* oStreamLocalBindMask */
2596: printf("streamlocalbindmask 0%o\n",
2597: o->fwd_opts.streamlocal_bind_mask);
1.257 djm 2598:
2599: /* oProxyCommand / oProxyJump */
2600: if (o->jump_host == NULL)
2601: dump_cfg_string(oProxyCommand, o->proxy_command);
2602: else {
2603: /* Check for numeric addresses */
2604: i = strchr(o->jump_host, ':') != NULL ||
2605: strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
2606: snprintf(buf, sizeof(buf), "%d", o->jump_port);
2607: printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
1.259 djm 2608: /* optional additional jump spec */
2609: o->jump_extra == NULL ? "" : o->jump_extra,
2610: o->jump_extra == NULL ? "" : ",",
1.257 djm 2611: /* optional user */
2612: o->jump_user == NULL ? "" : o->jump_user,
2613: o->jump_user == NULL ? "" : "@",
2614: /* opening [ if hostname is numeric */
2615: i ? "[" : "",
2616: /* mandatory hostname */
2617: o->jump_host,
2618: /* closing ] if hostname is numeric */
2619: i ? "]" : "",
2620: /* optional port number */
2621: o->jump_port <= 0 ? "" : ":",
1.259 djm 2622: o->jump_port <= 0 ? "" : buf);
1.257 djm 2623: }
1.1 deraadt 2624: }
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