Annotation of src/usr.bin/ssh/readconf.c, Revision 1.276
1.276 ! djm 1: /* $OpenBSD: readconf.c,v 1.275 2017/04/30 23:18:22 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,
1.144 reyk 151: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.248 markus 152: oVisualHostKey,
1.205 djm 153: oKexAlgorithms, oIPQoS, oRequestTTY, oIgnoreUnknown, oProxyUseFdpass,
1.209 djm 154: oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
155: oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
1.223 djm 156: oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
1.230 djm 157: oFingerprintHash, oUpdateHostkeys, oHostbasedKeyTypes,
1.257 djm 158: oPubkeyAcceptedKeyTypes, oProxyJump,
1.273 djm 159: oIgnore, oIgnoredUnknownOption, oDeprecated, oUnsupported
1.1 deraadt 160: } OpCodes;
161:
162: /* Textual representations of the tokens. */
163:
1.17 markus 164: static struct {
165: const char *name;
166: OpCodes opcode;
167: } keywords[] = {
1.266 djm 168: /* Deprecated options */
1.273 djm 169: { "protocol", oIgnore }, /* NB. silently ignored */
1.274 djm 170: { "cipher", oDeprecated },
1.266 djm 171: { "fallbacktorsh", oDeprecated },
172: { "globalknownhostsfile2", oDeprecated },
173: { "rhostsauthentication", oDeprecated },
174: { "userknownhostsfile2", oDeprecated },
175: { "useroaming", oDeprecated },
176: { "usersh", oDeprecated },
177:
178: /* Unsupported options */
179: { "afstokenpassing", oUnsupported },
180: { "kerberosauthentication", oUnsupported },
181: { "kerberostgtpassing", oUnsupported },
182:
183: /* Sometimes-unsupported options */
184: #if defined(GSSAPI)
185: { "gssapiauthentication", oGssAuthentication },
186: { "gssapidelegatecredentials", oGssDelegateCreds },
187: # else
188: { "gssapiauthentication", oUnsupported },
189: { "gssapidelegatecredentials", oUnsupported },
190: #endif
191: #ifdef ENABLE_PKCS11
192: { "smartcarddevice", oPKCS11Provider },
193: { "pkcs11provider", oPKCS11Provider },
194: # else
195: { "smartcarddevice", oUnsupported },
196: { "pkcs11provider", oUnsupported },
197: #endif
198: { "rsaauthentication", oUnsupported },
199: { "rhostsrsaauthentication", oUnsupported },
200: { "compressionlevel", oUnsupported },
201:
1.17 markus 202: { "forwardagent", oForwardAgent },
203: { "forwardx11", oForwardX11 },
1.123 markus 204: { "forwardx11trusted", oForwardX11Trusted },
1.186 djm 205: { "forwardx11timeout", oForwardX11Timeout },
1.153 markus 206: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 207: { "xauthlocation", oXAuthLocation },
1.17 markus 208: { "gatewayports", oGatewayPorts },
209: { "useprivilegedport", oUsePrivilegedPort },
210: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 211: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
212: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.50 markus 213: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 214: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.73 markus 215: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 216: { "challengeresponseauthentication", oChallengeResponseAuthentication },
217: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
218: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.17 markus 219: { "identityfile", oIdentityFile },
1.174 stevesk 220: { "identityfile2", oIdentityFile }, /* obsolete */
1.128 markus 221: { "identitiesonly", oIdentitiesOnly },
1.241 djm 222: { "certificatefile", oCertificateFile },
1.246 jcs 223: { "addkeystoagent", oAddKeysToAgent },
1.253 markus 224: { "identityagent", oIdentityAgent },
1.17 markus 225: { "hostname", oHostName },
1.52 markus 226: { "hostkeyalias", oHostKeyAlias },
1.17 markus 227: { "proxycommand", oProxyCommand },
228: { "port", oPort },
1.25 markus 229: { "ciphers", oCiphers },
1.62 markus 230: { "macs", oMacs },
1.17 markus 231: { "remoteforward", oRemoteForward },
232: { "localforward", oLocalForward },
233: { "user", oUser },
234: { "host", oHost },
1.206 djm 235: { "match", oMatch },
1.17 markus 236: { "escapechar", oEscapeChar },
237: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.174 stevesk 238: { "userknownhostsfile", oUserKnownHostsFile },
1.17 markus 239: { "connectionattempts", oConnectionAttempts },
240: { "batchmode", oBatchMode },
241: { "checkhostip", oCheckHostIP },
242: { "stricthostkeychecking", oStrictHostKeyChecking },
243: { "compression", oCompression },
1.126 markus 244: { "tcpkeepalive", oTCPKeepAlive },
245: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 246: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
1.271 dtucker 247: { "syslogfacility", oLogFacility },
1.17 markus 248: { "loglevel", oLogLevel },
1.71 markus 249: { "dynamicforward", oDynamicForward },
1.67 markus 250: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 251: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 252: { "bindaddress", oBindAddress },
1.93 deraadt 253: { "clearallforwardings", oClearAllForwardings },
1.101 markus 254: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 255: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 256: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 257: { "rekeylimit", oRekeyLimit },
1.111 djm 258: { "connecttimeout", oConnectTimeout },
1.112 djm 259: { "addressfamily", oAddressFamily },
1.127 markus 260: { "serveraliveinterval", oServerAliveInterval },
261: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 262: { "sendenv", oSendEnv },
1.132 djm 263: { "controlpath", oControlPath },
264: { "controlmaster", oControlMaster },
1.187 djm 265: { "controlpersist", oControlPersist },
1.136 djm 266: { "hashknownhosts", oHashKnownHosts },
1.252 djm 267: { "include", oInclude },
1.144 reyk 268: { "tunnel", oTunnel },
269: { "tunneldevice", oTunnelDevice },
270: { "localcommand", oLocalCommand },
271: { "permitlocalcommand", oPermitLocalCommand },
1.167 grunk 272: { "visualhostkey", oVisualHostKey },
1.189 djm 273: { "kexalgorithms", oKexAlgorithms },
1.190 djm 274: { "ipqos", oIPQoS },
1.192 djm 275: { "requesttty", oRequestTTY },
1.205 djm 276: { "proxyusefdpass", oProxyUseFdpass },
1.208 djm 277: { "canonicaldomains", oCanonicalDomains },
1.209 djm 278: { "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
279: { "canonicalizehostname", oCanonicalizeHostname },
280: { "canonicalizemaxdots", oCanonicalizeMaxDots },
281: { "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
1.220 millert 282: { "streamlocalbindmask", oStreamLocalBindMask },
283: { "streamlocalbindunlink", oStreamLocalBindUnlink },
1.223 djm 284: { "revokedhostkeys", oRevokedHostKeys },
1.224 djm 285: { "fingerprinthash", oFingerprintHash },
1.229 djm 286: { "updatehostkeys", oUpdateHostkeys },
1.230 djm 287: { "hostbasedkeytypes", oHostbasedKeyTypes },
1.238 markus 288: { "pubkeyacceptedkeytypes", oPubkeyAcceptedKeyTypes },
1.199 djm 289: { "ignoreunknown", oIgnoreUnknown },
1.257 djm 290: { "proxyjump", oProxyJump },
1.171 djm 291:
1.92 stevesk 292: { NULL, oBadOption }
1.13 markus 293: };
294:
1.19 markus 295: /*
296: * Adds a local TCP/IP port forward to options. Never returns if there is an
297: * error.
298: */
1.1 deraadt 299:
1.26 markus 300: void
1.220 millert 301: add_local_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 302: {
1.220 millert 303: struct Forward *fwd;
1.17 markus 304: extern uid_t original_real_uid;
1.251 djm 305: int i;
1.185 djm 306:
1.262 jsg 307: if (!bind_permitted(newfwd->listen_port, original_real_uid) &&
1.220 millert 308: newfwd->listen_path == NULL)
1.64 millert 309: fatal("Privileged ports can only be forwarded by root.");
1.251 djm 310: /* Don't add duplicates */
311: for (i = 0; i < options->num_local_forwards; i++) {
312: if (forward_equals(newfwd, options->local_forwards + i))
313: return;
314: }
1.234 deraadt 315: options->local_forwards = xreallocarray(options->local_forwards,
1.185 djm 316: options->num_local_forwards + 1,
317: sizeof(*options->local_forwards));
1.17 markus 318: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 319:
1.172 stevesk 320: fwd->listen_host = newfwd->listen_host;
1.135 djm 321: fwd->listen_port = newfwd->listen_port;
1.220 millert 322: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 323: fwd->connect_host = newfwd->connect_host;
1.135 djm 324: fwd->connect_port = newfwd->connect_port;
1.220 millert 325: fwd->connect_path = newfwd->connect_path;
1.1 deraadt 326: }
327:
1.19 markus 328: /*
329: * Adds a remote TCP/IP port forward to options. Never returns if there is
330: * an error.
331: */
1.1 deraadt 332:
1.26 markus 333: void
1.220 millert 334: add_remote_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 335: {
1.220 millert 336: struct Forward *fwd;
1.251 djm 337: int i;
1.185 djm 338:
1.251 djm 339: /* Don't add duplicates */
340: for (i = 0; i < options->num_remote_forwards; i++) {
341: if (forward_equals(newfwd, options->remote_forwards + i))
342: return;
343: }
1.234 deraadt 344: options->remote_forwards = xreallocarray(options->remote_forwards,
1.185 djm 345: options->num_remote_forwards + 1,
346: sizeof(*options->remote_forwards));
1.17 markus 347: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 348:
1.172 stevesk 349: fwd->listen_host = newfwd->listen_host;
1.135 djm 350: fwd->listen_port = newfwd->listen_port;
1.220 millert 351: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 352: fwd->connect_host = newfwd->connect_host;
1.135 djm 353: fwd->connect_port = newfwd->connect_port;
1.220 millert 354: fwd->connect_path = newfwd->connect_path;
1.194 markus 355: fwd->handle = newfwd->handle;
1.184 markus 356: fwd->allocated_port = 0;
1.1 deraadt 357: }
358:
1.90 stevesk 359: static void
360: clear_forwardings(Options *options)
361: {
362: int i;
363:
1.135 djm 364: for (i = 0; i < options->num_local_forwards; i++) {
1.202 djm 365: free(options->local_forwards[i].listen_host);
1.220 millert 366: free(options->local_forwards[i].listen_path);
1.202 djm 367: free(options->local_forwards[i].connect_host);
1.220 millert 368: free(options->local_forwards[i].connect_path);
1.135 djm 369: }
1.185 djm 370: if (options->num_local_forwards > 0) {
1.202 djm 371: free(options->local_forwards);
1.185 djm 372: options->local_forwards = NULL;
373: }
1.90 stevesk 374: options->num_local_forwards = 0;
1.135 djm 375: for (i = 0; i < options->num_remote_forwards; i++) {
1.202 djm 376: free(options->remote_forwards[i].listen_host);
1.220 millert 377: free(options->remote_forwards[i].listen_path);
1.202 djm 378: free(options->remote_forwards[i].connect_host);
1.220 millert 379: free(options->remote_forwards[i].connect_path);
1.135 djm 380: }
1.185 djm 381: if (options->num_remote_forwards > 0) {
1.202 djm 382: free(options->remote_forwards);
1.185 djm 383: options->remote_forwards = NULL;
384: }
1.90 stevesk 385: options->num_remote_forwards = 0;
1.145 reyk 386: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 387: }
388:
1.195 dtucker 389: void
1.241 djm 390: add_certificate_file(Options *options, const char *path, int userprovided)
391: {
392: int i;
393:
394: if (options->num_certificate_files >= SSH_MAX_CERTIFICATE_FILES)
395: fatal("Too many certificate files specified (max %d)",
396: SSH_MAX_CERTIFICATE_FILES);
397:
398: /* Avoid registering duplicates */
399: for (i = 0; i < options->num_certificate_files; i++) {
400: if (options->certificate_file_userprovided[i] == userprovided &&
401: strcmp(options->certificate_files[i], path) == 0) {
402: debug2("%s: ignoring duplicate key %s", __func__, path);
403: return;
404: }
405: }
406:
407: options->certificate_file_userprovided[options->num_certificate_files] =
408: userprovided;
409: options->certificate_files[options->num_certificate_files++] =
410: xstrdup(path);
411: }
412:
413: void
1.195 dtucker 414: add_identity_file(Options *options, const char *dir, const char *filename,
415: int userprovided)
416: {
417: char *path;
1.219 djm 418: int i;
1.195 dtucker 419:
420: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
421: fatal("Too many identity files specified (max %d)",
422: SSH_MAX_IDENTITY_FILES);
423:
424: if (dir == NULL) /* no dir, filename is absolute */
425: path = xstrdup(filename);
1.276 ! djm 426: else if (xasprintf(&path, "%s%s", dir, filename) >= PATH_MAX)
! 427: fatal("Identity file path %s too long", path);
1.219 djm 428:
429: /* Avoid registering duplicates */
430: for (i = 0; i < options->num_identity_files; i++) {
431: if (options->identity_file_userprovided[i] == userprovided &&
432: strcmp(options->identity_files[i], path) == 0) {
433: debug2("%s: ignoring duplicate key %s", __func__, path);
434: free(path);
435: return;
436: }
437: }
1.195 dtucker 438:
439: options->identity_file_userprovided[options->num_identity_files] =
440: userprovided;
441: options->identity_files[options->num_identity_files++] = path;
442: }
443:
1.206 djm 444: int
445: default_ssh_port(void)
446: {
447: static int port;
448: struct servent *sp;
449:
450: if (port == 0) {
451: sp = getservbyname(SSH_SERVICE_NAME, "tcp");
452: port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
453: }
454: return port;
455: }
456:
457: /*
458: * Execute a command in a shell.
459: * Return its exit status or -1 on abnormal exit.
460: */
461: static int
462: execute_in_shell(const char *cmd)
463: {
1.243 dtucker 464: char *shell;
1.206 djm 465: pid_t pid;
466: int devnull, status;
467: extern uid_t original_real_uid;
468:
469: if ((shell = getenv("SHELL")) == NULL)
470: shell = _PATH_BSHELL;
471:
472: /* Need this to redirect subprocess stdin/out */
473: if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
474: fatal("open(/dev/null): %s", strerror(errno));
475:
476: debug("Executing command: '%.500s'", cmd);
477:
478: /* Fork and execute the command. */
479: if ((pid = fork()) == 0) {
1.245 djm 480: char *argv[4];
1.206 djm 481:
482: /* Child. Permanently give up superuser privileges. */
483: permanently_drop_suid(original_real_uid);
484:
485: /* Redirect child stdin and stdout. Leave stderr */
486: if (dup2(devnull, STDIN_FILENO) == -1)
487: fatal("dup2: %s", strerror(errno));
488: if (dup2(devnull, STDOUT_FILENO) == -1)
489: fatal("dup2: %s", strerror(errno));
490: if (devnull > STDERR_FILENO)
491: close(devnull);
492: closefrom(STDERR_FILENO + 1);
1.245 djm 493:
494: argv[0] = shell;
495: argv[1] = "-c";
496: argv[2] = xstrdup(cmd);
497: argv[3] = NULL;
1.206 djm 498:
499: execv(argv[0], argv);
500: error("Unable to execute '%.100s': %s", cmd, strerror(errno));
501: /* Die with signal to make this error apparent to parent. */
502: signal(SIGTERM, SIG_DFL);
503: kill(getpid(), SIGTERM);
504: _exit(1);
505: }
506: /* Parent. */
507: if (pid < 0)
508: fatal("%s: fork: %.100s", __func__, strerror(errno));
509:
510: close(devnull);
511:
512: while (waitpid(pid, &status, 0) == -1) {
513: if (errno != EINTR && errno != EAGAIN)
514: fatal("%s: waitpid: %s", __func__, strerror(errno));
515: }
516: if (!WIFEXITED(status)) {
517: error("command '%.100s' exited abnormally", cmd);
518: return -1;
1.221 djm 519: }
1.206 djm 520: debug3("command returned status %d", WEXITSTATUS(status));
521: return WEXITSTATUS(status);
522: }
523:
524: /*
525: * Parse and execute a Match directive.
526: */
527: static int
528: match_cfg_line(Options *options, char **condition, struct passwd *pw,
1.221 djm 529: const char *host_arg, const char *original_host, int post_canon,
530: const char *filename, int linenum)
1.206 djm 531: {
1.221 djm 532: char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria;
1.211 djm 533: const char *ruser;
1.221 djm 534: int r, port, this_result, result = 1, attributes = 0, negate;
1.206 djm 535: char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
536:
537: /*
538: * Configuration is likely to be incomplete at this point so we
539: * must be prepared to use default values.
540: */
541: port = options->port <= 0 ? default_ssh_port() : options->port;
542: ruser = options->user == NULL ? pw->pw_name : options->user;
1.250 djm 543: if (post_canon) {
544: host = xstrdup(options->hostname);
545: } else if (options->hostname != NULL) {
1.212 djm 546: /* NB. Please keep in sync with ssh.c:main() */
1.211 djm 547: host = percent_expand(options->hostname,
548: "h", host_arg, (char *)NULL);
1.250 djm 549: } else {
1.211 djm 550: host = xstrdup(host_arg);
1.250 djm 551: }
1.206 djm 552:
1.221 djm 553: debug2("checking match for '%s' host %s originally %s",
554: cp, host, original_host);
555: while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') {
556: criteria = NULL;
557: this_result = 1;
558: if ((negate = attrib[0] == '!'))
559: attrib++;
560: /* criteria "all" and "canonical" have no argument */
1.213 dtucker 561: if (strcasecmp(attrib, "all") == 0) {
1.221 djm 562: if (attributes > 1 ||
1.213 dtucker 563: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
1.221 djm 564: error("%.200s line %d: '%s' cannot be combined "
565: "with other Match attributes",
566: filename, linenum, oattrib);
1.213 dtucker 567: result = -1;
568: goto out;
569: }
1.221 djm 570: if (result)
571: result = negate ? 0 : 1;
1.213 dtucker 572: goto out;
573: }
1.221 djm 574: attributes++;
575: if (strcasecmp(attrib, "canonical") == 0) {
576: r = !!post_canon; /* force bitmask member to boolean */
577: if (r == (negate ? 1 : 0))
578: this_result = result = 0;
579: debug3("%.200s line %d: %smatched '%s'",
580: filename, linenum,
581: this_result ? "" : "not ", oattrib);
582: continue;
583: }
584: /* All other criteria require an argument */
1.206 djm 585: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
586: error("Missing Match criteria for %s", attrib);
1.211 djm 587: result = -1;
588: goto out;
1.206 djm 589: }
590: if (strcasecmp(attrib, "host") == 0) {
1.221 djm 591: criteria = xstrdup(host);
1.235 djm 592: r = match_hostname(host, arg) == 1;
1.221 djm 593: if (r == (negate ? 1 : 0))
594: this_result = result = 0;
1.206 djm 595: } else if (strcasecmp(attrib, "originalhost") == 0) {
1.221 djm 596: criteria = xstrdup(original_host);
1.235 djm 597: r = match_hostname(original_host, arg) == 1;
1.221 djm 598: if (r == (negate ? 1 : 0))
599: this_result = result = 0;
1.206 djm 600: } else if (strcasecmp(attrib, "user") == 0) {
1.221 djm 601: criteria = xstrdup(ruser);
1.235 djm 602: r = match_pattern_list(ruser, arg, 0) == 1;
1.221 djm 603: if (r == (negate ? 1 : 0))
604: this_result = result = 0;
1.206 djm 605: } else if (strcasecmp(attrib, "localuser") == 0) {
1.221 djm 606: criteria = xstrdup(pw->pw_name);
1.235 djm 607: r = match_pattern_list(pw->pw_name, arg, 0) == 1;
1.221 djm 608: if (r == (negate ? 1 : 0))
609: this_result = result = 0;
1.210 djm 610: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 611: if (gethostname(thishost, sizeof(thishost)) == -1)
612: fatal("gethostname: %s", strerror(errno));
613: strlcpy(shorthost, thishost, sizeof(shorthost));
614: shorthost[strcspn(thishost, ".")] = '\0';
615: snprintf(portstr, sizeof(portstr), "%d", port);
616:
617: cmd = percent_expand(arg,
618: "L", shorthost,
619: "d", pw->pw_dir,
620: "h", host,
621: "l", thishost,
1.221 djm 622: "n", original_host,
1.206 djm 623: "p", portstr,
624: "r", ruser,
625: "u", pw->pw_name,
626: (char *)NULL);
1.217 djm 627: if (result != 1) {
628: /* skip execution if prior predicate failed */
1.221 djm 629: debug3("%.200s line %d: skipped exec "
630: "\"%.100s\"", filename, linenum, cmd);
631: free(cmd);
632: continue;
633: }
634: r = execute_in_shell(cmd);
635: if (r == -1) {
636: fatal("%.200s line %d: match exec "
637: "'%.100s' error", filename,
638: linenum, cmd);
1.217 djm 639: }
1.221 djm 640: criteria = xstrdup(cmd);
1.206 djm 641: free(cmd);
1.221 djm 642: /* Force exit status to boolean */
643: r = r == 0;
644: if (r == (negate ? 1 : 0))
645: this_result = result = 0;
1.206 djm 646: } else {
647: error("Unsupported Match attribute %s", attrib);
1.211 djm 648: result = -1;
649: goto out;
1.206 djm 650: }
1.221 djm 651: debug3("%.200s line %d: %smatched '%s \"%.100s\"' ",
652: filename, linenum, this_result ? "": "not ",
653: oattrib, criteria);
654: free(criteria);
1.213 dtucker 655: }
656: if (attributes == 0) {
657: error("One or more attributes required for Match");
658: result = -1;
659: goto out;
1.206 djm 660: }
1.221 djm 661: out:
662: if (result != -1)
663: debug2("match %sfound", result ? "" : "not ");
1.206 djm 664: *condition = cp;
1.211 djm 665: free(host);
1.206 djm 666: return result;
667: }
668:
1.208 djm 669: /* Check and prepare a domain name: removes trailing '.' and lowercases */
670: static void
671: valid_domain(char *name, const char *filename, int linenum)
672: {
673: size_t i, l = strlen(name);
674: u_char c, last = '\0';
675:
676: if (l == 0)
677: fatal("%s line %d: empty hostname suffix", filename, linenum);
678: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
679: fatal("%s line %d: hostname suffix \"%.100s\" "
680: "starts with invalid character", filename, linenum, name);
681: for (i = 0; i < l; i++) {
682: c = tolower((u_char)name[i]);
683: name[i] = (char)c;
684: if (last == '.' && c == '.')
685: fatal("%s line %d: hostname suffix \"%.100s\" contains "
686: "consecutive separators", filename, linenum, name);
687: if (c != '.' && c != '-' && !isalnum(c) &&
688: c != '_') /* technically invalid, but common */
689: fatal("%s line %d: hostname suffix \"%.100s\" contains "
690: "invalid characters", filename, linenum, name);
691: last = c;
692: }
693: if (name[l - 1] == '.')
694: name[l - 1] = '\0';
695: }
696:
1.19 markus 697: /*
1.70 stevesk 698: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 699: */
1.26 markus 700: static OpCodes
1.199 djm 701: parse_token(const char *cp, const char *filename, int linenum,
702: const char *ignored_unknown)
1.1 deraadt 703: {
1.199 djm 704: int i;
1.1 deraadt 705:
1.17 markus 706: for (i = 0; keywords[i].name; i++)
1.199 djm 707: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 708: return keywords[i].opcode;
1.235 djm 709: if (ignored_unknown != NULL &&
710: match_pattern_list(cp, ignored_unknown, 1) == 1)
1.199 djm 711: return oIgnoredUnknownOption;
1.75 stevesk 712: error("%s: line %d: Bad configuration option: %s",
713: filename, linenum, cp);
1.17 markus 714: return oBadOption;
1.1 deraadt 715: }
716:
1.207 djm 717: /* Multistate option parsing */
718: struct multistate {
719: char *key;
720: int value;
721: };
722: static const struct multistate multistate_flag[] = {
723: { "true", 1 },
724: { "false", 0 },
725: { "yes", 1 },
726: { "no", 0 },
727: { NULL, -1 }
728: };
729: static const struct multistate multistate_yesnoask[] = {
730: { "true", 1 },
731: { "false", 0 },
732: { "yes", 1 },
733: { "no", 0 },
734: { "ask", 2 },
735: { NULL, -1 }
736: };
1.246 jcs 737: static const struct multistate multistate_yesnoaskconfirm[] = {
738: { "true", 1 },
739: { "false", 0 },
740: { "yes", 1 },
741: { "no", 0 },
742: { "ask", 2 },
743: { "confirm", 3 },
744: { NULL, -1 }
745: };
1.207 djm 746: static const struct multistate multistate_addressfamily[] = {
747: { "inet", AF_INET },
748: { "inet6", AF_INET6 },
749: { "any", AF_UNSPEC },
750: { NULL, -1 }
751: };
752: static const struct multistate multistate_controlmaster[] = {
753: { "true", SSHCTL_MASTER_YES },
754: { "yes", SSHCTL_MASTER_YES },
755: { "false", SSHCTL_MASTER_NO },
756: { "no", SSHCTL_MASTER_NO },
757: { "auto", SSHCTL_MASTER_AUTO },
758: { "ask", SSHCTL_MASTER_ASK },
759: { "autoask", SSHCTL_MASTER_AUTO_ASK },
760: { NULL, -1 }
761: };
762: static const struct multistate multistate_tunnel[] = {
763: { "ethernet", SSH_TUNMODE_ETHERNET },
764: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
765: { "true", SSH_TUNMODE_DEFAULT },
766: { "yes", SSH_TUNMODE_DEFAULT },
767: { "false", SSH_TUNMODE_NO },
768: { "no", SSH_TUNMODE_NO },
769: { NULL, -1 }
770: };
771: static const struct multistate multistate_requesttty[] = {
772: { "true", REQUEST_TTY_YES },
773: { "yes", REQUEST_TTY_YES },
774: { "false", REQUEST_TTY_NO },
775: { "no", REQUEST_TTY_NO },
776: { "force", REQUEST_TTY_FORCE },
777: { "auto", REQUEST_TTY_AUTO },
778: { NULL, -1 }
779: };
1.209 djm 780: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 781: { "true", SSH_CANONICALISE_YES },
782: { "false", SSH_CANONICALISE_NO },
783: { "yes", SSH_CANONICALISE_YES },
784: { "no", SSH_CANONICALISE_NO },
785: { "always", SSH_CANONICALISE_ALWAYS },
786: { NULL, -1 }
787: };
1.207 djm 788:
1.19 markus 789: /*
790: * Processes a single option line as used in the configuration files. This
791: * only sets those values that have not already been set.
792: */
1.14 markus 793: int
1.206 djm 794: process_config_line(Options *options, struct passwd *pw, const char *host,
1.221 djm 795: const char *original_host, char *line, const char *filename,
796: int linenum, int *activep, int flags)
1.1 deraadt 797: {
1.252 djm 798: return process_config_line_depth(options, pw, host, original_host,
799: line, filename, linenum, activep, flags, 0);
800: }
801:
802: #define WHITESPACE " \t\r\n"
803: static int
804: process_config_line_depth(Options *options, struct passwd *pw, const char *host,
805: const char *original_host, char *line, const char *filename,
806: int linenum, int *activep, int flags, int depth)
807: {
1.193 djm 808: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
809: char **cpptr, fwdarg[256];
1.199 djm 810: u_int i, *uintptr, max_entries = 0;
1.252 djm 811: int r, oactive, negated, opcode, *intptr, value, value2, cmdline = 0;
1.164 dtucker 812: LogLevel *log_level_ptr;
1.271 dtucker 813: SyslogFacility *log_facility_ptr;
1.201 dtucker 814: long long val64;
1.102 markus 815: size_t len;
1.220 millert 816: struct Forward fwd;
1.207 djm 817: const struct multistate *multistate_ptr;
1.208 djm 818: struct allowed_cname *cname;
1.252 djm 819: glob_t gl;
1.106 djm 820:
1.206 djm 821: if (activep == NULL) { /* We are processing a command line directive */
822: cmdline = 1;
823: activep = &cmdline;
824: }
825:
1.267 djm 826: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1.233 djm 827: if ((len = strlen(line)) == 0)
828: return 0;
829: for (len--; len > 0; len--) {
1.267 djm 830: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1.106 djm 831: break;
832: line[len] = '\0';
833: }
1.1 deraadt 834:
1.42 provos 835: s = line;
836: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 837: if ((keyword = strdelim(&s)) == NULL)
838: return 0;
1.42 provos 839: /* Ignore leading whitespace. */
840: if (*keyword == '\0')
1.43 markus 841: keyword = strdelim(&s);
1.56 deraadt 842: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 843: return 0;
1.199 djm 844: /* Match lowercase keyword */
1.207 djm 845: lowercase(keyword);
1.17 markus 846:
1.199 djm 847: opcode = parse_token(keyword, filename, linenum,
848: options->ignored_unknown);
1.17 markus 849:
850: switch (opcode) {
851: case oBadOption:
1.19 markus 852: /* don't panic, but count bad options */
853: return -1;
1.273 djm 854: case oIgnore:
855: return 0;
1.199 djm 856: case oIgnoredUnknownOption:
857: debug("%s line %d: Ignored unknown option \"%s\"",
858: filename, linenum, keyword);
859: return 0;
1.111 djm 860: case oConnectTimeout:
861: intptr = &options->connection_timeout;
1.127 markus 862: parse_time:
1.111 djm 863: arg = strdelim(&s);
864: if (!arg || *arg == '\0')
865: fatal("%s line %d: missing time value.",
866: filename, linenum);
1.221 djm 867: if (strcmp(arg, "none") == 0)
868: value = -1;
869: else if ((value = convtime(arg)) == -1)
1.111 djm 870: fatal("%s line %d: invalid time value.",
871: filename, linenum);
1.160 dtucker 872: if (*activep && *intptr == -1)
1.111 djm 873: *intptr = value;
874: break;
875:
1.17 markus 876: case oForwardAgent:
877: intptr = &options->forward_agent;
1.207 djm 878: parse_flag:
879: multistate_ptr = multistate_flag;
880: parse_multistate:
1.42 provos 881: arg = strdelim(&s);
1.40 ho 882: if (!arg || *arg == '\0')
1.207 djm 883: fatal("%s line %d: missing argument.",
884: filename, linenum);
885: value = -1;
886: for (i = 0; multistate_ptr[i].key != NULL; i++) {
887: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
888: value = multistate_ptr[i].value;
889: break;
890: }
891: }
892: if (value == -1)
893: fatal("%s line %d: unsupported option \"%s\".",
894: filename, linenum, arg);
1.17 markus 895: if (*activep && *intptr == -1)
896: *intptr = value;
897: break;
898:
899: case oForwardX11:
900: intptr = &options->forward_x11;
901: goto parse_flag;
902:
1.123 markus 903: case oForwardX11Trusted:
904: intptr = &options->forward_x11_trusted;
905: goto parse_flag;
1.221 djm 906:
1.186 djm 907: case oForwardX11Timeout:
908: intptr = &options->forward_x11_timeout;
909: goto parse_time;
1.123 markus 910:
1.17 markus 911: case oGatewayPorts:
1.220 millert 912: intptr = &options->fwd_opts.gateway_ports;
1.17 markus 913: goto parse_flag;
914:
1.153 markus 915: case oExitOnForwardFailure:
916: intptr = &options->exit_on_forward_failure;
917: goto parse_flag;
918:
1.17 markus 919: case oUsePrivilegedPort:
920: intptr = &options->use_privileged_port;
921: goto parse_flag;
922:
923: case oPasswordAuthentication:
924: intptr = &options->password_authentication;
925: goto parse_flag;
926:
1.48 markus 927: case oKbdInteractiveAuthentication:
928: intptr = &options->kbd_interactive_authentication;
929: goto parse_flag;
930:
931: case oKbdInteractiveDevices:
932: charptr = &options->kbd_interactive_devices;
933: goto parse_string;
934:
1.50 markus 935: case oPubkeyAuthentication:
936: intptr = &options->pubkey_authentication;
1.30 markus 937: goto parse_flag;
938:
1.72 markus 939: case oHostbasedAuthentication:
940: intptr = &options->hostbased_authentication;
941: goto parse_flag;
942:
1.59 markus 943: case oChallengeResponseAuthentication:
1.78 markus 944: intptr = &options->challenge_response_authentication;
1.17 markus 945: goto parse_flag;
1.108 jakob 946:
1.118 markus 947: case oGssAuthentication:
948: intptr = &options->gss_authentication;
949: goto parse_flag;
950:
951: case oGssDelegateCreds:
952: intptr = &options->gss_deleg_creds;
953: goto parse_flag;
954:
1.17 markus 955: case oBatchMode:
956: intptr = &options->batch_mode;
957: goto parse_flag;
958:
959: case oCheckHostIP:
960: intptr = &options->check_host_ip;
1.167 grunk 961: goto parse_flag;
1.17 markus 962:
1.107 jakob 963: case oVerifyHostKeyDNS:
964: intptr = &options->verify_host_key_dns;
1.207 djm 965: multistate_ptr = multistate_yesnoask;
966: goto parse_multistate;
1.107 jakob 967:
1.17 markus 968: case oStrictHostKeyChecking:
969: intptr = &options->strict_host_key_checking;
1.207 djm 970: multistate_ptr = multistate_yesnoask;
971: goto parse_multistate;
1.17 markus 972:
973: case oCompression:
974: intptr = &options->compression;
975: goto parse_flag;
976:
1.126 markus 977: case oTCPKeepAlive:
978: intptr = &options->tcp_keep_alive;
1.17 markus 979: goto parse_flag;
980:
1.91 markus 981: case oNoHostAuthenticationForLocalhost:
982: intptr = &options->no_host_authentication_for_localhost;
983: goto parse_flag;
984:
1.17 markus 985: case oNumberOfPasswordPrompts:
986: intptr = &options->number_of_password_prompts;
987: goto parse_int;
988:
1.105 markus 989: case oRekeyLimit:
990: arg = strdelim(&s);
991: if (!arg || *arg == '\0')
1.198 dtucker 992: fatal("%.200s line %d: Missing argument.", filename,
993: linenum);
994: if (strcmp(arg, "default") == 0) {
995: val64 = 0;
996: } else {
1.200 dtucker 997: if (scan_scaled(arg, &val64) == -1)
998: fatal("%.200s line %d: Bad number '%s': %s",
999: filename, linenum, arg, strerror(errno));
1.198 dtucker 1000: if (val64 != 0 && val64 < 16)
1001: fatal("%.200s line %d: RekeyLimit too small",
1002: filename, linenum);
1.105 markus 1003: }
1.165 djm 1004: if (*activep && options->rekey_limit == -1)
1.249 dtucker 1005: options->rekey_limit = val64;
1.198 dtucker 1006: if (s != NULL) { /* optional rekey interval present */
1007: if (strcmp(s, "none") == 0) {
1008: (void)strdelim(&s); /* discard */
1009: break;
1010: }
1011: intptr = &options->rekey_interval;
1012: goto parse_time;
1013: }
1.105 markus 1014: break;
1015:
1.17 markus 1016: case oIdentityFile:
1.42 provos 1017: arg = strdelim(&s);
1.40 ho 1018: if (!arg || *arg == '\0')
1.17 markus 1019: fatal("%.200s line %d: Missing argument.", filename, linenum);
1020: if (*activep) {
1.50 markus 1021: intptr = &options->num_identity_files;
1.27 markus 1022: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 1023: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 1024: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.221 djm 1025: add_identity_file(options, NULL,
1026: arg, flags & SSHCONF_USERCONF);
1.17 markus 1027: }
1028: break;
1029:
1.241 djm 1030: case oCertificateFile:
1031: arg = strdelim(&s);
1032: if (!arg || *arg == '\0')
1033: fatal("%.200s line %d: Missing argument.",
1034: filename, linenum);
1035: if (*activep) {
1036: intptr = &options->num_certificate_files;
1037: if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
1038: fatal("%.200s line %d: Too many certificate "
1039: "files specified (max %d).",
1040: filename, linenum,
1041: SSH_MAX_CERTIFICATE_FILES);
1042: }
1043: add_certificate_file(options, arg,
1044: flags & SSHCONF_USERCONF);
1045: }
1046: break;
1047:
1.34 markus 1048: case oXAuthLocation:
1049: charptr=&options->xauth_location;
1050: goto parse_string;
1051:
1.17 markus 1052: case oUser:
1053: charptr = &options->user;
1054: parse_string:
1.42 provos 1055: arg = strdelim(&s);
1.40 ho 1056: if (!arg || *arg == '\0')
1.193 djm 1057: fatal("%.200s line %d: Missing argument.",
1058: filename, linenum);
1.17 markus 1059: if (*activep && *charptr == NULL)
1.38 provos 1060: *charptr = xstrdup(arg);
1.17 markus 1061: break;
1062:
1063: case oGlobalKnownHostsFile:
1.193 djm 1064: cpptr = (char **)&options->system_hostfiles;
1065: uintptr = &options->num_system_hostfiles;
1066: max_entries = SSH_MAX_HOSTS_FILES;
1067: parse_char_array:
1068: if (*activep && *uintptr == 0) {
1069: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1070: if ((*uintptr) >= max_entries)
1071: fatal("%s line %d: "
1072: "too many authorized keys files.",
1073: filename, linenum);
1074: cpptr[(*uintptr)++] = xstrdup(arg);
1075: }
1076: }
1077: return 0;
1.17 markus 1078:
1079: case oUserKnownHostsFile:
1.193 djm 1080: cpptr = (char **)&options->user_hostfiles;
1081: uintptr = &options->num_user_hostfiles;
1082: max_entries = SSH_MAX_HOSTS_FILES;
1083: goto parse_char_array;
1.27 markus 1084:
1.17 markus 1085: case oHostName:
1086: charptr = &options->hostname;
1087: goto parse_string;
1088:
1.52 markus 1089: case oHostKeyAlias:
1090: charptr = &options->host_key_alias;
1091: goto parse_string;
1092:
1.67 markus 1093: case oPreferredAuthentications:
1094: charptr = &options->preferred_authentications;
1095: goto parse_string;
1096:
1.77 markus 1097: case oBindAddress:
1098: charptr = &options->bind_address;
1099: goto parse_string;
1100:
1.183 markus 1101: case oPKCS11Provider:
1102: charptr = &options->pkcs11_provider;
1.86 markus 1103: goto parse_string;
1.85 jakob 1104:
1.17 markus 1105: case oProxyCommand:
1.144 reyk 1106: charptr = &options->proxy_command;
1.257 djm 1107: /* Ignore ProxyCommand if ProxyJump already specified */
1108: if (options->jump_host != NULL)
1109: charptr = &options->jump_host; /* Skip below */
1.144 reyk 1110: parse_command:
1.113 markus 1111: if (s == NULL)
1112: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 1113: len = strspn(s, WHITESPACE "=");
1.17 markus 1114: if (*activep && *charptr == NULL)
1.102 markus 1115: *charptr = xstrdup(s + len);
1.17 markus 1116: return 0;
1117:
1.257 djm 1118: case oProxyJump:
1119: if (s == NULL) {
1120: fatal("%.200s line %d: Missing argument.",
1121: filename, linenum);
1122: }
1123: len = strspn(s, WHITESPACE "=");
1124: if (parse_jump(s + len, options, *activep) == -1) {
1125: fatal("%.200s line %d: Invalid ProxyJump \"%s\"",
1126: filename, linenum, s + len);
1127: }
1128: return 0;
1129:
1.17 markus 1130: case oPort:
1131: intptr = &options->port;
1132: parse_int:
1.42 provos 1133: arg = strdelim(&s);
1.40 ho 1134: if (!arg || *arg == '\0')
1.17 markus 1135: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1136: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 1137: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 1138:
1139: /* Octal, decimal, or hex format? */
1.38 provos 1140: value = strtol(arg, &endofnumber, 0);
1141: if (arg == endofnumber)
1.21 markus 1142: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 1143: if (*activep && *intptr == -1)
1144: *intptr = value;
1145: break;
1146:
1147: case oConnectionAttempts:
1148: intptr = &options->connection_attempts;
1149: goto parse_int;
1150:
1.25 markus 1151: case oCiphers:
1.42 provos 1152: arg = strdelim(&s);
1.40 ho 1153: if (!arg || *arg == '\0')
1.32 markus 1154: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1155: if (*arg != '-' && !ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.31 markus 1156: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1157: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1158: if (*activep && options->ciphers == NULL)
1.38 provos 1159: options->ciphers = xstrdup(arg);
1.25 markus 1160: break;
1161:
1.62 markus 1162: case oMacs:
1163: arg = strdelim(&s);
1164: if (!arg || *arg == '\0')
1165: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1166: if (*arg != '-' && !mac_valid(*arg == '+' ? arg + 1 : arg))
1.62 markus 1167: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1168: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1169: if (*activep && options->macs == NULL)
1170: options->macs = xstrdup(arg);
1171: break;
1172:
1.189 djm 1173: case oKexAlgorithms:
1174: arg = strdelim(&s);
1175: if (!arg || *arg == '\0')
1176: fatal("%.200s line %d: Missing argument.",
1177: filename, linenum);
1.268 djm 1178: if (*arg != '-' &&
1179: !kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.189 djm 1180: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1181: filename, linenum, arg ? arg : "<NONE>");
1182: if (*activep && options->kex_algorithms == NULL)
1183: options->kex_algorithms = xstrdup(arg);
1184: break;
1185:
1.76 markus 1186: case oHostKeyAlgorithms:
1.238 markus 1187: charptr = &options->hostkeyalgorithms;
1188: parse_keytypes:
1.76 markus 1189: arg = strdelim(&s);
1190: if (!arg || *arg == '\0')
1.238 markus 1191: fatal("%.200s line %d: Missing argument.",
1192: filename, linenum);
1.268 djm 1193: if (*arg != '-' &&
1194: !sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.238 markus 1195: fatal("%s line %d: Bad key types '%s'.",
1196: filename, linenum, arg ? arg : "<NONE>");
1197: if (*activep && *charptr == NULL)
1198: *charptr = xstrdup(arg);
1.76 markus 1199: break;
1200:
1.17 markus 1201: case oLogLevel:
1.164 dtucker 1202: log_level_ptr = &options->log_level;
1.42 provos 1203: arg = strdelim(&s);
1.38 provos 1204: value = log_level_number(arg);
1.95 markus 1205: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1206: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1207: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1208: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1209: *log_level_ptr = (LogLevel) value;
1.17 markus 1210: break;
1211:
1.271 dtucker 1212: case oLogFacility:
1213: log_facility_ptr = &options->log_facility;
1214: arg = strdelim(&s);
1215: value = log_facility_number(arg);
1216: if (value == SYSLOG_FACILITY_NOT_SET)
1217: fatal("%.200s line %d: unsupported log facility '%s'",
1218: filename, linenum, arg ? arg : "<NONE>");
1219: if (*log_facility_ptr == -1)
1220: *log_facility_ptr = (SyslogFacility) value;
1221: break;
1222:
1.88 stevesk 1223: case oLocalForward:
1.17 markus 1224: case oRemoteForward:
1.168 stevesk 1225: case oDynamicForward:
1.42 provos 1226: arg = strdelim(&s);
1.135 djm 1227: if (arg == NULL || *arg == '\0')
1.88 stevesk 1228: fatal("%.200s line %d: Missing port argument.",
1229: filename, linenum);
1.135 djm 1230:
1.168 stevesk 1231: if (opcode == oLocalForward ||
1232: opcode == oRemoteForward) {
1233: arg2 = strdelim(&s);
1234: if (arg2 == NULL || *arg2 == '\0')
1235: fatal("%.200s line %d: Missing target argument.",
1236: filename, linenum);
1.135 djm 1237:
1.168 stevesk 1238: /* construct a string for parse_forward */
1239: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1240: } else if (opcode == oDynamicForward) {
1241: strlcpy(fwdarg, arg, sizeof(fwdarg));
1242: }
1243:
1244: if (parse_forward(&fwd, fwdarg,
1.176 djm 1245: opcode == oDynamicForward ? 1 : 0,
1246: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1247: fatal("%.200s line %d: Bad forwarding specification.",
1248: filename, linenum);
1.135 djm 1249:
1.88 stevesk 1250: if (*activep) {
1.168 stevesk 1251: if (opcode == oLocalForward ||
1252: opcode == oDynamicForward)
1.135 djm 1253: add_local_forward(options, &fwd);
1.88 stevesk 1254: else if (opcode == oRemoteForward)
1.135 djm 1255: add_remote_forward(options, &fwd);
1.88 stevesk 1256: }
1.17 markus 1257: break;
1.71 markus 1258:
1.90 stevesk 1259: case oClearAllForwardings:
1260: intptr = &options->clear_forwardings;
1261: goto parse_flag;
1262:
1.17 markus 1263: case oHost:
1.206 djm 1264: if (cmdline)
1265: fatal("Host directive not supported as a command-line "
1266: "option");
1.17 markus 1267: *activep = 0;
1.191 djm 1268: arg2 = NULL;
1269: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.252 djm 1270: if ((flags & SSHCONF_NEVERMATCH) != 0)
1271: break;
1.191 djm 1272: negated = *arg == '!';
1273: if (negated)
1274: arg++;
1.38 provos 1275: if (match_pattern(host, arg)) {
1.191 djm 1276: if (negated) {
1277: debug("%.200s line %d: Skipping Host "
1278: "block because of negated match "
1279: "for %.100s", filename, linenum,
1280: arg);
1281: *activep = 0;
1282: break;
1283: }
1284: if (!*activep)
1285: arg2 = arg; /* logged below */
1.17 markus 1286: *activep = 1;
1287: }
1.191 djm 1288: }
1289: if (*activep)
1290: debug("%.200s line %d: Applying options for %.100s",
1291: filename, linenum, arg2);
1.42 provos 1292: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1293: return 0;
1294:
1.206 djm 1295: case oMatch:
1296: if (cmdline)
1297: fatal("Host directive not supported as a command-line "
1298: "option");
1.221 djm 1299: value = match_cfg_line(options, &s, pw, host, original_host,
1300: flags & SSHCONF_POSTCANON, filename, linenum);
1.206 djm 1301: if (value < 0)
1302: fatal("%.200s line %d: Bad Match condition", filename,
1303: linenum);
1.252 djm 1304: *activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
1.206 djm 1305: break;
1306:
1.17 markus 1307: case oEscapeChar:
1308: intptr = &options->escape_char;
1.42 provos 1309: arg = strdelim(&s);
1.40 ho 1310: if (!arg || *arg == '\0')
1.17 markus 1311: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.236 djm 1312: if (strcmp(arg, "none") == 0)
1313: value = SSH_ESCAPECHAR_NONE;
1314: else if (arg[1] == '\0')
1315: value = (u_char) arg[0];
1316: else if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1317: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1318: value = (u_char) arg[1] & 31;
1.17 markus 1319: else {
1320: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1321: filename, linenum);
1.17 markus 1322: /* NOTREACHED */
1323: value = 0; /* Avoid compiler warning. */
1324: }
1325: if (*activep && *intptr == -1)
1326: *intptr = value;
1.112 djm 1327: break;
1328:
1329: case oAddressFamily:
1.114 djm 1330: intptr = &options->address_family;
1.207 djm 1331: multistate_ptr = multistate_addressfamily;
1332: goto parse_multistate;
1.17 markus 1333:
1.101 markus 1334: case oEnableSSHKeysign:
1335: intptr = &options->enable_ssh_keysign;
1336: goto parse_flag;
1337:
1.128 markus 1338: case oIdentitiesOnly:
1339: intptr = &options->identities_only;
1340: goto parse_flag;
1341:
1.127 markus 1342: case oServerAliveInterval:
1343: intptr = &options->server_alive_interval;
1344: goto parse_time;
1345:
1346: case oServerAliveCountMax:
1347: intptr = &options->server_alive_count_max;
1348: goto parse_int;
1349:
1.130 djm 1350: case oSendEnv:
1351: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1352: if (strchr(arg, '=') != NULL)
1353: fatal("%s line %d: Invalid environment name.",
1354: filename, linenum);
1.137 djm 1355: if (!*activep)
1356: continue;
1.130 djm 1357: if (options->num_send_env >= MAX_SEND_ENV)
1358: fatal("%s line %d: too many send env.",
1359: filename, linenum);
1360: options->send_env[options->num_send_env++] =
1361: xstrdup(arg);
1362: }
1363: break;
1364:
1.132 djm 1365: case oControlPath:
1366: charptr = &options->control_path;
1367: goto parse_string;
1368:
1369: case oControlMaster:
1370: intptr = &options->control_master;
1.207 djm 1371: multistate_ptr = multistate_controlmaster;
1372: goto parse_multistate;
1.132 djm 1373:
1.187 djm 1374: case oControlPersist:
1375: /* no/false/yes/true, or a time spec */
1376: intptr = &options->control_persist;
1377: arg = strdelim(&s);
1378: if (!arg || *arg == '\0')
1379: fatal("%.200s line %d: Missing ControlPersist"
1380: " argument.", filename, linenum);
1381: value = 0;
1382: value2 = 0; /* timeout */
1383: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1384: value = 0;
1385: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1386: value = 1;
1387: else if ((value2 = convtime(arg)) >= 0)
1388: value = 1;
1389: else
1390: fatal("%.200s line %d: Bad ControlPersist argument.",
1391: filename, linenum);
1392: if (*activep && *intptr == -1) {
1393: *intptr = value;
1394: options->control_persist_timeout = value2;
1395: }
1396: break;
1397:
1.136 djm 1398: case oHashKnownHosts:
1399: intptr = &options->hash_known_hosts;
1400: goto parse_flag;
1401:
1.144 reyk 1402: case oTunnel:
1403: intptr = &options->tun_open;
1.207 djm 1404: multistate_ptr = multistate_tunnel;
1405: goto parse_multistate;
1.144 reyk 1406:
1407: case oTunnelDevice:
1408: arg = strdelim(&s);
1409: if (!arg || *arg == '\0')
1410: fatal("%.200s line %d: Missing argument.", filename, linenum);
1411: value = a2tun(arg, &value2);
1.145 reyk 1412: if (value == SSH_TUNID_ERR)
1.144 reyk 1413: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1414: if (*activep) {
1415: options->tun_local = value;
1416: options->tun_remote = value2;
1417: }
1418: break;
1419:
1420: case oLocalCommand:
1421: charptr = &options->local_command;
1422: goto parse_command;
1423:
1424: case oPermitLocalCommand:
1425: intptr = &options->permit_local_command;
1426: goto parse_flag;
1427:
1.167 grunk 1428: case oVisualHostKey:
1429: intptr = &options->visual_host_key;
1430: goto parse_flag;
1431:
1.252 djm 1432: case oInclude:
1433: if (cmdline)
1434: fatal("Include directive not supported as a "
1435: "command-line option");
1436: value = 0;
1437: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1438: /*
1439: * Ensure all paths are anchored. User configuration
1440: * files may begin with '~/' but system configurations
1441: * must not. If the path is relative, then treat it
1442: * as living in ~/.ssh for user configurations or
1443: * /etc/ssh for system ones.
1444: */
1445: if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0)
1446: fatal("%.200s line %d: bad include path %s.",
1447: filename, linenum, arg);
1448: if (*arg != '/' && *arg != '~') {
1449: xasprintf(&arg2, "%s/%s",
1450: (flags & SSHCONF_USERCONF) ?
1451: "~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
1452: } else
1453: arg2 = xstrdup(arg);
1454: memset(&gl, 0, sizeof(gl));
1455: r = glob(arg2, GLOB_TILDE, NULL, &gl);
1456: if (r == GLOB_NOMATCH) {
1457: debug("%.200s line %d: include %s matched no "
1458: "files",filename, linenum, arg2);
1.269 dtucker 1459: free(arg2);
1.252 djm 1460: continue;
1461: } else if (r != 0 || gl.gl_pathc < 0)
1462: fatal("%.200s line %d: glob failed for %s.",
1463: filename, linenum, arg2);
1464: free(arg2);
1465: oactive = *activep;
1466: for (i = 0; i < (u_int)gl.gl_pathc; i++) {
1467: debug3("%.200s line %d: Including file %s "
1468: "depth %d%s", filename, linenum,
1469: gl.gl_pathv[i], depth,
1470: oactive ? "" : " (parse only)");
1471: r = read_config_file_depth(gl.gl_pathv[i],
1472: pw, host, original_host, options,
1473: flags | SSHCONF_CHECKPERM |
1474: (oactive ? 0 : SSHCONF_NEVERMATCH),
1475: activep, depth + 1);
1.264 djm 1476: if (r != 1 && errno != ENOENT) {
1.263 djm 1477: fatal("Can't open user config file "
1478: "%.100s: %.100s", gl.gl_pathv[i],
1479: strerror(errno));
1480: }
1.252 djm 1481: /*
1482: * don't let Match in includes clobber the
1483: * containing file's Match state.
1484: */
1485: *activep = oactive;
1486: if (r != 1)
1487: value = -1;
1488: }
1489: globfree(&gl);
1490: }
1491: if (value != 0)
1492: return value;
1493: break;
1494:
1.190 djm 1495: case oIPQoS:
1496: arg = strdelim(&s);
1497: if ((value = parse_ipqos(arg)) == -1)
1498: fatal("%s line %d: Bad IPQoS value: %s",
1499: filename, linenum, arg);
1500: arg = strdelim(&s);
1501: if (arg == NULL)
1502: value2 = value;
1503: else if ((value2 = parse_ipqos(arg)) == -1)
1504: fatal("%s line %d: Bad IPQoS value: %s",
1505: filename, linenum, arg);
1506: if (*activep) {
1507: options->ip_qos_interactive = value;
1508: options->ip_qos_bulk = value2;
1509: }
1510: break;
1511:
1.192 djm 1512: case oRequestTTY:
1513: intptr = &options->request_tty;
1.207 djm 1514: multistate_ptr = multistate_requesttty;
1515: goto parse_multistate;
1.192 djm 1516:
1.199 djm 1517: case oIgnoreUnknown:
1518: charptr = &options->ignored_unknown;
1519: goto parse_string;
1520:
1.205 djm 1521: case oProxyUseFdpass:
1522: intptr = &options->proxy_use_fdpass;
1523: goto parse_flag;
1524:
1.208 djm 1525: case oCanonicalDomains:
1526: value = options->num_canonical_domains != 0;
1527: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1528: valid_domain(arg, filename, linenum);
1529: if (!*activep || value)
1530: continue;
1531: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1532: fatal("%s line %d: too many hostname suffixes.",
1533: filename, linenum);
1534: options->canonical_domains[
1535: options->num_canonical_domains++] = xstrdup(arg);
1536: }
1537: break;
1538:
1.209 djm 1539: case oCanonicalizePermittedCNAMEs:
1.208 djm 1540: value = options->num_permitted_cnames != 0;
1541: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1542: /* Either '*' for everything or 'list:list' */
1543: if (strcmp(arg, "*") == 0)
1544: arg2 = arg;
1545: else {
1546: lowercase(arg);
1547: if ((arg2 = strchr(arg, ':')) == NULL ||
1548: arg2[1] == '\0') {
1549: fatal("%s line %d: "
1550: "Invalid permitted CNAME \"%s\"",
1551: filename, linenum, arg);
1552: }
1553: *arg2 = '\0';
1554: arg2++;
1555: }
1556: if (!*activep || value)
1557: continue;
1558: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1559: fatal("%s line %d: too many permitted CNAMEs.",
1560: filename, linenum);
1561: cname = options->permitted_cnames +
1562: options->num_permitted_cnames++;
1563: cname->source_list = xstrdup(arg);
1564: cname->target_list = xstrdup(arg2);
1565: }
1566: break;
1567:
1.209 djm 1568: case oCanonicalizeHostname:
1569: intptr = &options->canonicalize_hostname;
1570: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1571: goto parse_multistate;
1572:
1.209 djm 1573: case oCanonicalizeMaxDots:
1574: intptr = &options->canonicalize_max_dots;
1.208 djm 1575: goto parse_int;
1576:
1.209 djm 1577: case oCanonicalizeFallbackLocal:
1578: intptr = &options->canonicalize_fallback_local;
1.208 djm 1579: goto parse_flag;
1580:
1.220 millert 1581: case oStreamLocalBindMask:
1582: arg = strdelim(&s);
1583: if (!arg || *arg == '\0')
1584: fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum);
1585: /* Parse mode in octal format */
1586: value = strtol(arg, &endofnumber, 8);
1587: if (arg == endofnumber || value < 0 || value > 0777)
1588: fatal("%.200s line %d: Bad mask.", filename, linenum);
1589: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1590: break;
1591:
1592: case oStreamLocalBindUnlink:
1593: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1594: goto parse_flag;
1595:
1.223 djm 1596: case oRevokedHostKeys:
1597: charptr = &options->revoked_host_keys;
1598: goto parse_string;
1599:
1.224 djm 1600: case oFingerprintHash:
1.225 djm 1601: intptr = &options->fingerprint_hash;
1.224 djm 1602: arg = strdelim(&s);
1603: if (!arg || *arg == '\0')
1604: fatal("%.200s line %d: Missing argument.",
1605: filename, linenum);
1606: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1607: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1608: filename, linenum, arg);
1.225 djm 1609: if (*activep && *intptr == -1)
1610: *intptr = value;
1.224 djm 1611: break;
1612:
1.229 djm 1613: case oUpdateHostkeys:
1614: intptr = &options->update_hostkeys;
1.232 djm 1615: multistate_ptr = multistate_yesnoask;
1616: goto parse_multistate;
1.229 djm 1617:
1.230 djm 1618: case oHostbasedKeyTypes:
1619: charptr = &options->hostbased_key_types;
1.238 markus 1620: goto parse_keytypes;
1621:
1622: case oPubkeyAcceptedKeyTypes:
1623: charptr = &options->pubkey_key_types;
1624: goto parse_keytypes;
1.230 djm 1625:
1.246 jcs 1626: case oAddKeysToAgent:
1627: intptr = &options->add_keys_to_agent;
1628: multistate_ptr = multistate_yesnoaskconfirm;
1629: goto parse_multistate;
1630:
1.253 markus 1631: case oIdentityAgent:
1632: charptr = &options->identity_agent;
1633: goto parse_string;
1634:
1.96 markus 1635: case oDeprecated:
1.98 markus 1636: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1637: filename, linenum, keyword);
1.98 markus 1638: return 0;
1.96 markus 1639:
1.110 jakob 1640: case oUnsupported:
1641: error("%s line %d: Unsupported option \"%s\"",
1642: filename, linenum, keyword);
1643: return 0;
1644:
1.17 markus 1645: default:
1.221 djm 1646: fatal("%s: Unimplemented opcode %d", __func__, opcode);
1.17 markus 1647: }
1648:
1649: /* Check that there is no garbage at end of line. */
1.57 djm 1650: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1651: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1652: filename, linenum, arg);
1.39 ho 1653: }
1.17 markus 1654: return 0;
1.1 deraadt 1655: }
1656:
1.19 markus 1657: /*
1658: * Reads the config file and modifies the options accordingly. Options
1659: * should already be initialized before this call. This never returns if
1.89 stevesk 1660: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1661: */
1.89 stevesk 1662: int
1.206 djm 1663: read_config_file(const char *filename, struct passwd *pw, const char *host,
1.221 djm 1664: const char *original_host, Options *options, int flags)
1.1 deraadt 1665: {
1.252 djm 1666: int active = 1;
1667:
1668: return read_config_file_depth(filename, pw, host, original_host,
1669: options, flags, &active, 0);
1670: }
1671:
1672: #define READCONF_MAX_DEPTH 16
1673: static int
1674: read_config_file_depth(const char *filename, struct passwd *pw,
1675: const char *host, const char *original_host, Options *options,
1676: int flags, int *activep, int depth)
1677: {
1.17 markus 1678: FILE *f;
1.270 djm 1679: char line[4096];
1.252 djm 1680: int linenum;
1.17 markus 1681: int bad_options = 0;
1682:
1.252 djm 1683: if (depth < 0 || depth > READCONF_MAX_DEPTH)
1684: fatal("Too many recursive configuration includes");
1685:
1.129 djm 1686: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1687: return 0;
1.129 djm 1688:
1.196 dtucker 1689: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1690: struct stat sb;
1.134 deraadt 1691:
1.131 dtucker 1692: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1693: fatal("fstat %s: %s", filename, strerror(errno));
1694: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1695: (sb.st_mode & 022) != 0))
1.129 djm 1696: fatal("Bad owner or permissions on %s", filename);
1697: }
1.17 markus 1698:
1699: debug("Reading configuration data %.200s", filename);
1700:
1.19 markus 1701: /*
1702: * Mark that we are now processing the options. This flag is turned
1703: * on/off by Host specifications.
1704: */
1.17 markus 1705: linenum = 0;
1706: while (fgets(line, sizeof(line), f)) {
1707: /* Update line number counter. */
1708: linenum++;
1.270 djm 1709: if (strlen(line) == sizeof(line) - 1)
1710: fatal("%s line %d too long", filename, linenum);
1.252 djm 1711: if (process_config_line_depth(options, pw, host, original_host,
1712: line, filename, linenum, activep, flags, depth) != 0)
1.17 markus 1713: bad_options++;
1714: }
1715: fclose(f);
1716: if (bad_options > 0)
1.64 millert 1717: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1718: filename, bad_options);
1.89 stevesk 1719: return 1;
1.1 deraadt 1720: }
1721:
1.218 djm 1722: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1723: int
1724: option_clear_or_none(const char *o)
1725: {
1726: return o == NULL || strcasecmp(o, "none") == 0;
1727: }
1728:
1.19 markus 1729: /*
1730: * Initializes options to special values that indicate that they have not yet
1731: * been set. Read_config_file will only set options with this value. Options
1732: * are processed in the following order: command line, user config file,
1733: * system config file. Last, fill_default_options is called.
1734: */
1.1 deraadt 1735:
1.26 markus 1736: void
1.17 markus 1737: initialize_options(Options * options)
1.1 deraadt 1738: {
1.17 markus 1739: memset(options, 'X', sizeof(*options));
1740: options->forward_agent = -1;
1741: options->forward_x11 = -1;
1.123 markus 1742: options->forward_x11_trusted = -1;
1.186 djm 1743: options->forward_x11_timeout = -1;
1.255 dtucker 1744: options->stdio_forward_host = NULL;
1745: options->stdio_forward_port = 0;
1.256 dtucker 1746: options->clear_forwardings = -1;
1.153 markus 1747: options->exit_on_forward_failure = -1;
1.34 markus 1748: options->xauth_location = NULL;
1.220 millert 1749: options->fwd_opts.gateway_ports = -1;
1750: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
1751: options->fwd_opts.streamlocal_bind_unlink = -1;
1.17 markus 1752: options->use_privileged_port = -1;
1.50 markus 1753: options->pubkey_authentication = -1;
1.78 markus 1754: options->challenge_response_authentication = -1;
1.118 markus 1755: options->gss_authentication = -1;
1756: options->gss_deleg_creds = -1;
1.17 markus 1757: options->password_authentication = -1;
1.48 markus 1758: options->kbd_interactive_authentication = -1;
1759: options->kbd_interactive_devices = NULL;
1.72 markus 1760: options->hostbased_authentication = -1;
1.17 markus 1761: options->batch_mode = -1;
1762: options->check_host_ip = -1;
1763: options->strict_host_key_checking = -1;
1764: options->compression = -1;
1.126 markus 1765: options->tcp_keep_alive = -1;
1.17 markus 1766: options->port = -1;
1.114 djm 1767: options->address_family = -1;
1.17 markus 1768: options->connection_attempts = -1;
1.111 djm 1769: options->connection_timeout = -1;
1.17 markus 1770: options->number_of_password_prompts = -1;
1.25 markus 1771: options->ciphers = NULL;
1.62 markus 1772: options->macs = NULL;
1.189 djm 1773: options->kex_algorithms = NULL;
1.76 markus 1774: options->hostkeyalgorithms = NULL;
1.17 markus 1775: options->num_identity_files = 0;
1.241 djm 1776: options->num_certificate_files = 0;
1.17 markus 1777: options->hostname = NULL;
1.52 markus 1778: options->host_key_alias = NULL;
1.17 markus 1779: options->proxy_command = NULL;
1.257 djm 1780: options->jump_user = NULL;
1781: options->jump_host = NULL;
1782: options->jump_port = -1;
1783: options->jump_extra = NULL;
1.17 markus 1784: options->user = NULL;
1785: options->escape_char = -1;
1.193 djm 1786: options->num_system_hostfiles = 0;
1787: options->num_user_hostfiles = 0;
1.185 djm 1788: options->local_forwards = NULL;
1.17 markus 1789: options->num_local_forwards = 0;
1.185 djm 1790: options->remote_forwards = NULL;
1.17 markus 1791: options->num_remote_forwards = 0;
1.271 dtucker 1792: options->log_facility = SYSLOG_FACILITY_NOT_SET;
1.95 markus 1793: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1794: options->preferred_authentications = NULL;
1.77 markus 1795: options->bind_address = NULL;
1.183 markus 1796: options->pkcs11_provider = NULL;
1.101 markus 1797: options->enable_ssh_keysign = - 1;
1.91 markus 1798: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1799: options->identities_only = - 1;
1.105 markus 1800: options->rekey_limit = - 1;
1.198 dtucker 1801: options->rekey_interval = -1;
1.107 jakob 1802: options->verify_host_key_dns = -1;
1.127 markus 1803: options->server_alive_interval = -1;
1804: options->server_alive_count_max = -1;
1.130 djm 1805: options->num_send_env = 0;
1.132 djm 1806: options->control_path = NULL;
1807: options->control_master = -1;
1.187 djm 1808: options->control_persist = -1;
1809: options->control_persist_timeout = 0;
1.136 djm 1810: options->hash_known_hosts = -1;
1.144 reyk 1811: options->tun_open = -1;
1812: options->tun_local = -1;
1813: options->tun_remote = -1;
1814: options->local_command = NULL;
1815: options->permit_local_command = -1;
1.246 jcs 1816: options->add_keys_to_agent = -1;
1.253 markus 1817: options->identity_agent = NULL;
1.167 grunk 1818: options->visual_host_key = -1;
1.190 djm 1819: options->ip_qos_interactive = -1;
1820: options->ip_qos_bulk = -1;
1.192 djm 1821: options->request_tty = -1;
1.205 djm 1822: options->proxy_use_fdpass = -1;
1.199 djm 1823: options->ignored_unknown = NULL;
1.208 djm 1824: options->num_canonical_domains = 0;
1825: options->num_permitted_cnames = 0;
1.209 djm 1826: options->canonicalize_max_dots = -1;
1827: options->canonicalize_fallback_local = -1;
1828: options->canonicalize_hostname = -1;
1.223 djm 1829: options->revoked_host_keys = NULL;
1.224 djm 1830: options->fingerprint_hash = -1;
1.229 djm 1831: options->update_hostkeys = -1;
1.230 djm 1832: options->hostbased_key_types = NULL;
1.238 markus 1833: options->pubkey_key_types = NULL;
1.1 deraadt 1834: }
1835:
1.19 markus 1836: /*
1.218 djm 1837: * A petite version of fill_default_options() that just fills the options
1838: * needed for hostname canonicalization to proceed.
1839: */
1840: void
1841: fill_default_options_for_canonicalization(Options *options)
1842: {
1843: if (options->canonicalize_max_dots == -1)
1844: options->canonicalize_max_dots = 1;
1845: if (options->canonicalize_fallback_local == -1)
1846: options->canonicalize_fallback_local = 1;
1847: if (options->canonicalize_hostname == -1)
1848: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1849: }
1850:
1851: /*
1.19 markus 1852: * Called after processing other sources of option data, this fills those
1853: * options for which no value has been specified with their default values.
1854: */
1.26 markus 1855: void
1.17 markus 1856: fill_default_options(Options * options)
1.1 deraadt 1857: {
1.17 markus 1858: if (options->forward_agent == -1)
1.33 markus 1859: options->forward_agent = 0;
1.17 markus 1860: if (options->forward_x11 == -1)
1.23 markus 1861: options->forward_x11 = 0;
1.123 markus 1862: if (options->forward_x11_trusted == -1)
1863: options->forward_x11_trusted = 0;
1.186 djm 1864: if (options->forward_x11_timeout == -1)
1865: options->forward_x11_timeout = 1200;
1.256 dtucker 1866: /*
1867: * stdio forwarding (-W) changes the default for these but we defer
1868: * setting the values so they can be overridden.
1869: */
1.153 markus 1870: if (options->exit_on_forward_failure == -1)
1.256 dtucker 1871: options->exit_on_forward_failure =
1872: options->stdio_forward_host != NULL ? 1 : 0;
1873: if (options->clear_forwardings == -1)
1874: options->clear_forwardings =
1875: options->stdio_forward_host != NULL ? 1 : 0;
1876: if (options->clear_forwardings == 1)
1877: clear_forwardings(options);
1878:
1.34 markus 1879: if (options->xauth_location == NULL)
1.80 markus 1880: options->xauth_location = _PATH_XAUTH;
1.220 millert 1881: if (options->fwd_opts.gateway_ports == -1)
1882: options->fwd_opts.gateway_ports = 0;
1883: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
1884: options->fwd_opts.streamlocal_bind_mask = 0177;
1885: if (options->fwd_opts.streamlocal_bind_unlink == -1)
1886: options->fwd_opts.streamlocal_bind_unlink = 0;
1.17 markus 1887: if (options->use_privileged_port == -1)
1.65 markus 1888: options->use_privileged_port = 0;
1.50 markus 1889: if (options->pubkey_authentication == -1)
1890: options->pubkey_authentication = 1;
1.78 markus 1891: if (options->challenge_response_authentication == -1)
1.83 markus 1892: options->challenge_response_authentication = 1;
1.118 markus 1893: if (options->gss_authentication == -1)
1.122 markus 1894: options->gss_authentication = 0;
1.118 markus 1895: if (options->gss_deleg_creds == -1)
1896: options->gss_deleg_creds = 0;
1.17 markus 1897: if (options->password_authentication == -1)
1898: options->password_authentication = 1;
1.48 markus 1899: if (options->kbd_interactive_authentication == -1)
1.59 markus 1900: options->kbd_interactive_authentication = 1;
1.72 markus 1901: if (options->hostbased_authentication == -1)
1902: options->hostbased_authentication = 0;
1.17 markus 1903: if (options->batch_mode == -1)
1904: options->batch_mode = 0;
1905: if (options->check_host_ip == -1)
1906: options->check_host_ip = 1;
1907: if (options->strict_host_key_checking == -1)
1908: options->strict_host_key_checking = 2; /* 2 is default */
1909: if (options->compression == -1)
1910: options->compression = 0;
1.126 markus 1911: if (options->tcp_keep_alive == -1)
1912: options->tcp_keep_alive = 1;
1.17 markus 1913: if (options->port == -1)
1914: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1915: if (options->address_family == -1)
1916: options->address_family = AF_UNSPEC;
1.17 markus 1917: if (options->connection_attempts == -1)
1.84 markus 1918: options->connection_attempts = 1;
1.17 markus 1919: if (options->number_of_password_prompts == -1)
1920: options->number_of_password_prompts = 3;
1.76 markus 1921: /* options->hostkeyalgorithms, default set in myproposals.h */
1.246 jcs 1922: if (options->add_keys_to_agent == -1)
1923: options->add_keys_to_agent = 0;
1.17 markus 1924: if (options->num_identity_files == 0) {
1.273 djm 1925: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_RSA, 0);
1926: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_DSA, 0);
1927: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_ECDSA, 0);
1928: add_identity_file(options, "~/",
1929: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.27 markus 1930: }
1.17 markus 1931: if (options->escape_char == -1)
1932: options->escape_char = '~';
1.193 djm 1933: if (options->num_system_hostfiles == 0) {
1934: options->system_hostfiles[options->num_system_hostfiles++] =
1935: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1936: options->system_hostfiles[options->num_system_hostfiles++] =
1937: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1938: }
1939: if (options->num_user_hostfiles == 0) {
1940: options->user_hostfiles[options->num_user_hostfiles++] =
1941: xstrdup(_PATH_SSH_USER_HOSTFILE);
1942: options->user_hostfiles[options->num_user_hostfiles++] =
1943: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1944: }
1.95 markus 1945: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1946: options->log_level = SYSLOG_LEVEL_INFO;
1.271 dtucker 1947: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1948: options->log_facility = SYSLOG_FACILITY_USER;
1.91 markus 1949: if (options->no_host_authentication_for_localhost == - 1)
1950: options->no_host_authentication_for_localhost = 0;
1.128 markus 1951: if (options->identities_only == -1)
1952: options->identities_only = 0;
1.101 markus 1953: if (options->enable_ssh_keysign == -1)
1954: options->enable_ssh_keysign = 0;
1.105 markus 1955: if (options->rekey_limit == -1)
1956: options->rekey_limit = 0;
1.198 dtucker 1957: if (options->rekey_interval == -1)
1958: options->rekey_interval = 0;
1.107 jakob 1959: if (options->verify_host_key_dns == -1)
1960: options->verify_host_key_dns = 0;
1.127 markus 1961: if (options->server_alive_interval == -1)
1962: options->server_alive_interval = 0;
1963: if (options->server_alive_count_max == -1)
1964: options->server_alive_count_max = 3;
1.132 djm 1965: if (options->control_master == -1)
1966: options->control_master = 0;
1.187 djm 1967: if (options->control_persist == -1) {
1968: options->control_persist = 0;
1969: options->control_persist_timeout = 0;
1970: }
1.136 djm 1971: if (options->hash_known_hosts == -1)
1972: options->hash_known_hosts = 0;
1.144 reyk 1973: if (options->tun_open == -1)
1.145 reyk 1974: options->tun_open = SSH_TUNMODE_NO;
1975: if (options->tun_local == -1)
1976: options->tun_local = SSH_TUNID_ANY;
1977: if (options->tun_remote == -1)
1978: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1979: if (options->permit_local_command == -1)
1980: options->permit_local_command = 0;
1.167 grunk 1981: if (options->visual_host_key == -1)
1982: options->visual_host_key = 0;
1.190 djm 1983: if (options->ip_qos_interactive == -1)
1984: options->ip_qos_interactive = IPTOS_LOWDELAY;
1985: if (options->ip_qos_bulk == -1)
1986: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1987: if (options->request_tty == -1)
1988: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 1989: if (options->proxy_use_fdpass == -1)
1990: options->proxy_use_fdpass = 0;
1.209 djm 1991: if (options->canonicalize_max_dots == -1)
1992: options->canonicalize_max_dots = 1;
1993: if (options->canonicalize_fallback_local == -1)
1994: options->canonicalize_fallback_local = 1;
1995: if (options->canonicalize_hostname == -1)
1996: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.224 djm 1997: if (options->fingerprint_hash == -1)
1998: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.229 djm 1999: if (options->update_hostkeys == -1)
1.231 djm 2000: options->update_hostkeys = 0;
1.239 djm 2001: if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 ||
2002: kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 ||
2003: kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 ||
2004: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2005: &options->hostbased_key_types) != 0 ||
2006: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2007: &options->pubkey_key_types) != 0)
2008: fatal("%s: kex_assemble_names failed", __func__);
1.224 djm 2009:
1.207 djm 2010: #define CLEAR_ON_NONE(v) \
2011: do { \
1.218 djm 2012: if (option_clear_or_none(v)) { \
1.207 djm 2013: free(v); \
2014: v = NULL; \
2015: } \
2016: } while(0)
2017: CLEAR_ON_NONE(options->local_command);
2018: CLEAR_ON_NONE(options->proxy_command);
2019: CLEAR_ON_NONE(options->control_path);
1.223 djm 2020: CLEAR_ON_NONE(options->revoked_host_keys);
1.254 markus 2021: /* options->identity_agent distinguishes NULL from 'none' */
1.17 markus 2022: /* options->user will be set in the main program if appropriate */
2023: /* options->hostname will be set in the main program if appropriate */
1.52 markus 2024: /* options->host_key_alias should not be set by default */
1.67 markus 2025: /* options->preferred_authentications will be set in ssh */
1.135 djm 2026: }
2027:
1.220 millert 2028: struct fwdarg {
2029: char *arg;
2030: int ispath;
2031: };
2032:
2033: /*
2034: * parse_fwd_field
2035: * parses the next field in a port forwarding specification.
2036: * sets fwd to the parsed field and advances p past the colon
2037: * or sets it to NULL at end of string.
2038: * returns 0 on success, else non-zero.
2039: */
2040: static int
2041: parse_fwd_field(char **p, struct fwdarg *fwd)
2042: {
2043: char *ep, *cp = *p;
2044: int ispath = 0;
2045:
2046: if (*cp == '\0') {
2047: *p = NULL;
2048: return -1; /* end of string */
2049: }
2050:
2051: /*
2052: * A field escaped with square brackets is used literally.
2053: * XXX - allow ']' to be escaped via backslash?
2054: */
2055: if (*cp == '[') {
2056: /* find matching ']' */
2057: for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
2058: if (*ep == '/')
2059: ispath = 1;
2060: }
2061: /* no matching ']' or not at end of field. */
2062: if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
2063: return -1;
2064: /* NUL terminate the field and advance p past the colon */
2065: *ep++ = '\0';
2066: if (*ep != '\0')
2067: *ep++ = '\0';
2068: fwd->arg = cp + 1;
2069: fwd->ispath = ispath;
2070: *p = ep;
2071: return 0;
2072: }
2073:
2074: for (cp = *p; *cp != '\0'; cp++) {
2075: switch (*cp) {
2076: case '\\':
2077: memmove(cp, cp + 1, strlen(cp + 1) + 1);
1.237 djm 2078: if (*cp == '\0')
2079: return -1;
1.220 millert 2080: break;
2081: case '/':
2082: ispath = 1;
2083: break;
2084: case ':':
2085: *cp++ = '\0';
2086: goto done;
2087: }
2088: }
2089: done:
2090: fwd->arg = *p;
2091: fwd->ispath = ispath;
2092: *p = cp;
2093: return 0;
2094: }
2095:
1.135 djm 2096: /*
2097: * parse_forward
2098: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 2099: * dynamicfwd == 0
1.220 millert 2100: * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
2101: * listenpath:connectpath
1.168 stevesk 2102: * dynamicfwd == 1
2103: * [listenhost:]listenport
1.135 djm 2104: * returns number of arguments parsed or zero on error
2105: */
2106: int
1.220 millert 2107: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 2108: {
1.220 millert 2109: struct fwdarg fwdargs[4];
2110: char *p, *cp;
1.135 djm 2111: int i;
2112:
1.220 millert 2113: memset(fwd, 0, sizeof(*fwd));
2114: memset(fwdargs, 0, sizeof(fwdargs));
1.135 djm 2115:
2116: cp = p = xstrdup(fwdspec);
2117:
2118: /* skip leading spaces */
1.214 deraadt 2119: while (isspace((u_char)*cp))
1.135 djm 2120: cp++;
2121:
1.220 millert 2122: for (i = 0; i < 4; ++i) {
2123: if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.135 djm 2124: break;
1.220 millert 2125: }
1.135 djm 2126:
1.170 stevesk 2127: /* Check for trailing garbage */
1.220 millert 2128: if (cp != NULL && *cp != '\0') {
1.135 djm 2129: i = 0; /* failure */
1.220 millert 2130: }
1.135 djm 2131:
2132: switch (i) {
1.168 stevesk 2133: case 1:
1.220 millert 2134: if (fwdargs[0].ispath) {
2135: fwd->listen_path = xstrdup(fwdargs[0].arg);
2136: fwd->listen_port = PORT_STREAMLOCAL;
2137: } else {
2138: fwd->listen_host = NULL;
2139: fwd->listen_port = a2port(fwdargs[0].arg);
2140: }
1.168 stevesk 2141: fwd->connect_host = xstrdup("socks");
2142: break;
2143:
2144: case 2:
1.220 millert 2145: if (fwdargs[0].ispath && fwdargs[1].ispath) {
2146: fwd->listen_path = xstrdup(fwdargs[0].arg);
2147: fwd->listen_port = PORT_STREAMLOCAL;
2148: fwd->connect_path = xstrdup(fwdargs[1].arg);
2149: fwd->connect_port = PORT_STREAMLOCAL;
2150: } else if (fwdargs[1].ispath) {
2151: fwd->listen_host = NULL;
2152: fwd->listen_port = a2port(fwdargs[0].arg);
2153: fwd->connect_path = xstrdup(fwdargs[1].arg);
2154: fwd->connect_port = PORT_STREAMLOCAL;
2155: } else {
2156: fwd->listen_host = xstrdup(fwdargs[0].arg);
2157: fwd->listen_port = a2port(fwdargs[1].arg);
2158: fwd->connect_host = xstrdup("socks");
2159: }
1.168 stevesk 2160: break;
2161:
1.135 djm 2162: case 3:
1.220 millert 2163: if (fwdargs[0].ispath) {
2164: fwd->listen_path = xstrdup(fwdargs[0].arg);
2165: fwd->listen_port = PORT_STREAMLOCAL;
2166: fwd->connect_host = xstrdup(fwdargs[1].arg);
2167: fwd->connect_port = a2port(fwdargs[2].arg);
2168: } else if (fwdargs[2].ispath) {
2169: fwd->listen_host = xstrdup(fwdargs[0].arg);
2170: fwd->listen_port = a2port(fwdargs[1].arg);
2171: fwd->connect_path = xstrdup(fwdargs[2].arg);
2172: fwd->connect_port = PORT_STREAMLOCAL;
2173: } else {
2174: fwd->listen_host = NULL;
2175: fwd->listen_port = a2port(fwdargs[0].arg);
2176: fwd->connect_host = xstrdup(fwdargs[1].arg);
2177: fwd->connect_port = a2port(fwdargs[2].arg);
2178: }
1.135 djm 2179: break;
2180:
2181: case 4:
1.220 millert 2182: fwd->listen_host = xstrdup(fwdargs[0].arg);
2183: fwd->listen_port = a2port(fwdargs[1].arg);
2184: fwd->connect_host = xstrdup(fwdargs[2].arg);
2185: fwd->connect_port = a2port(fwdargs[3].arg);
1.135 djm 2186: break;
2187: default:
2188: i = 0; /* failure */
2189: }
2190:
1.202 djm 2191: free(p);
1.135 djm 2192:
1.168 stevesk 2193: if (dynamicfwd) {
2194: if (!(i == 1 || i == 2))
2195: goto fail_free;
2196: } else {
1.220 millert 2197: if (!(i == 3 || i == 4)) {
2198: if (fwd->connect_path == NULL &&
2199: fwd->listen_path == NULL)
2200: goto fail_free;
2201: }
2202: if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.168 stevesk 2203: goto fail_free;
2204: }
2205:
1.220 millert 2206: if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
2207: (!remotefwd && fwd->listen_port == 0))
1.135 djm 2208: goto fail_free;
2209: if (fwd->connect_host != NULL &&
2210: strlen(fwd->connect_host) >= NI_MAXHOST)
2211: goto fail_free;
1.220 millert 2212: /* XXX - if connecting to a remote socket, max sun len may not match this host */
2213: if (fwd->connect_path != NULL &&
2214: strlen(fwd->connect_path) >= PATH_MAX_SUN)
2215: goto fail_free;
1.176 djm 2216: if (fwd->listen_host != NULL &&
2217: strlen(fwd->listen_host) >= NI_MAXHOST)
2218: goto fail_free;
1.220 millert 2219: if (fwd->listen_path != NULL &&
2220: strlen(fwd->listen_path) >= PATH_MAX_SUN)
2221: goto fail_free;
1.135 djm 2222:
2223: return (i);
2224:
2225: fail_free:
1.202 djm 2226: free(fwd->connect_host);
2227: fwd->connect_host = NULL;
1.220 millert 2228: free(fwd->connect_path);
2229: fwd->connect_path = NULL;
1.202 djm 2230: free(fwd->listen_host);
2231: fwd->listen_host = NULL;
1.220 millert 2232: free(fwd->listen_path);
2233: fwd->listen_path = NULL;
1.135 djm 2234: return (0);
1.221 djm 2235: }
2236:
1.257 djm 2237: int
2238: parse_jump(const char *s, Options *o, int active)
2239: {
2240: char *orig, *sdup, *cp;
2241: char *host = NULL, *user = NULL;
1.258 naddy 2242: int ret = -1, port = -1, first;
1.257 djm 2243:
2244: active &= o->proxy_command == NULL && o->jump_host == NULL;
2245:
2246: orig = sdup = xstrdup(s);
1.258 naddy 2247: first = active;
1.259 djm 2248: do {
2249: if ((cp = strrchr(sdup, ',')) == NULL)
2250: cp = sdup; /* last */
2251: else
2252: *cp++ = '\0';
2253:
1.258 naddy 2254: if (first) {
1.257 djm 2255: /* First argument and configuration is active */
2256: if (parse_user_host_port(cp, &user, &host, &port) != 0)
2257: goto out;
2258: } else {
2259: /* Subsequent argument or inactive configuration */
2260: if (parse_user_host_port(cp, NULL, NULL, NULL) != 0)
2261: goto out;
2262: }
1.258 naddy 2263: first = 0; /* only check syntax for subsequent hosts */
1.259 djm 2264: } while (cp != sdup);
1.257 djm 2265: /* success */
1.258 naddy 2266: if (active) {
2267: o->jump_user = user;
2268: o->jump_host = host;
2269: o->jump_port = port;
2270: o->proxy_command = xstrdup("none");
2271: user = host = NULL;
1.259 djm 2272: if ((cp = strrchr(s, ',')) != NULL && cp != s) {
2273: o->jump_extra = xstrdup(s);
2274: o->jump_extra[cp - s] = '\0';
2275: }
1.258 naddy 2276: }
1.257 djm 2277: ret = 0;
2278: out:
1.258 naddy 2279: free(orig);
1.257 djm 2280: free(user);
2281: free(host);
2282: return ret;
2283: }
2284:
1.221 djm 2285: /* XXX the following is a near-vebatim copy from servconf.c; refactor */
2286: static const char *
2287: fmt_multistate_int(int val, const struct multistate *m)
2288: {
2289: u_int i;
2290:
2291: for (i = 0; m[i].key != NULL; i++) {
2292: if (m[i].value == val)
2293: return m[i].key;
2294: }
2295: return "UNKNOWN";
2296: }
2297:
2298: static const char *
2299: fmt_intarg(OpCodes code, int val)
2300: {
2301: if (val == -1)
2302: return "unset";
2303: switch (code) {
2304: case oAddressFamily:
2305: return fmt_multistate_int(val, multistate_addressfamily);
2306: case oVerifyHostKeyDNS:
2307: case oStrictHostKeyChecking:
1.232 djm 2308: case oUpdateHostkeys:
1.221 djm 2309: return fmt_multistate_int(val, multistate_yesnoask);
2310: case oControlMaster:
2311: return fmt_multistate_int(val, multistate_controlmaster);
2312: case oTunnel:
2313: return fmt_multistate_int(val, multistate_tunnel);
2314: case oRequestTTY:
2315: return fmt_multistate_int(val, multistate_requesttty);
2316: case oCanonicalizeHostname:
2317: return fmt_multistate_int(val, multistate_canonicalizehostname);
1.224 djm 2318: case oFingerprintHash:
2319: return ssh_digest_alg_name(val);
1.221 djm 2320: default:
2321: switch (val) {
2322: case 0:
2323: return "no";
2324: case 1:
2325: return "yes";
2326: default:
2327: return "UNKNOWN";
2328: }
2329: }
2330: }
2331:
2332: static const char *
2333: lookup_opcode_name(OpCodes code)
2334: {
2335: u_int i;
2336:
2337: for (i = 0; keywords[i].name != NULL; i++)
2338: if (keywords[i].opcode == code)
2339: return(keywords[i].name);
2340: return "UNKNOWN";
2341: }
2342:
2343: static void
2344: dump_cfg_int(OpCodes code, int val)
2345: {
2346: printf("%s %d\n", lookup_opcode_name(code), val);
2347: }
2348:
2349: static void
2350: dump_cfg_fmtint(OpCodes code, int val)
2351: {
2352: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2353: }
2354:
2355: static void
2356: dump_cfg_string(OpCodes code, const char *val)
2357: {
2358: if (val == NULL)
2359: return;
2360: printf("%s %s\n", lookup_opcode_name(code), val);
2361: }
2362:
2363: static void
2364: dump_cfg_strarray(OpCodes code, u_int count, char **vals)
2365: {
2366: u_int i;
2367:
2368: for (i = 0; i < count; i++)
2369: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2370: }
2371:
2372: static void
2373: dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
2374: {
2375: u_int i;
2376:
2377: printf("%s", lookup_opcode_name(code));
2378: for (i = 0; i < count; i++)
2379: printf(" %s", vals[i]);
2380: printf("\n");
2381: }
2382:
2383: static void
2384: dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
2385: {
2386: const struct Forward *fwd;
2387: u_int i;
2388:
2389: /* oDynamicForward */
2390: for (i = 0; i < count; i++) {
2391: fwd = &fwds[i];
1.265 djm 2392: if (code == oDynamicForward && fwd->connect_host != NULL &&
1.221 djm 2393: strcmp(fwd->connect_host, "socks") != 0)
2394: continue;
1.265 djm 2395: if (code == oLocalForward && fwd->connect_host != NULL &&
1.221 djm 2396: strcmp(fwd->connect_host, "socks") == 0)
2397: continue;
2398: printf("%s", lookup_opcode_name(code));
2399: if (fwd->listen_port == PORT_STREAMLOCAL)
2400: printf(" %s", fwd->listen_path);
2401: else if (fwd->listen_host == NULL)
2402: printf(" %d", fwd->listen_port);
2403: else {
2404: printf(" [%s]:%d",
2405: fwd->listen_host, fwd->listen_port);
2406: }
2407: if (code != oDynamicForward) {
2408: if (fwd->connect_port == PORT_STREAMLOCAL)
2409: printf(" %s", fwd->connect_path);
2410: else if (fwd->connect_host == NULL)
2411: printf(" %d", fwd->connect_port);
2412: else {
2413: printf(" [%s]:%d",
2414: fwd->connect_host, fwd->connect_port);
2415: }
2416: }
2417: printf("\n");
2418: }
2419: }
2420:
2421: void
2422: dump_client_config(Options *o, const char *host)
2423: {
2424: int i;
1.257 djm 2425: char buf[8];
1.221 djm 2426:
1.240 djm 2427: /* This is normally prepared in ssh_kex2 */
2428: if (kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->hostkeyalgorithms) != 0)
2429: fatal("%s: kex_assemble_names failed", __func__);
2430:
1.221 djm 2431: /* Most interesting options first: user, host, port */
2432: dump_cfg_string(oUser, o->user);
2433: dump_cfg_string(oHostName, host);
2434: dump_cfg_int(oPort, o->port);
2435:
2436: /* Flag options */
2437: dump_cfg_fmtint(oAddressFamily, o->address_family);
2438: dump_cfg_fmtint(oBatchMode, o->batch_mode);
2439: dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
2440: dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
2441: dump_cfg_fmtint(oChallengeResponseAuthentication, o->challenge_response_authentication);
2442: dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
2443: dump_cfg_fmtint(oCompression, o->compression);
2444: dump_cfg_fmtint(oControlMaster, o->control_master);
2445: dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
1.256 dtucker 2446: dump_cfg_fmtint(oClearAllForwardings, o->clear_forwardings);
1.221 djm 2447: dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
1.224 djm 2448: dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
1.221 djm 2449: dump_cfg_fmtint(oForwardAgent, o->forward_agent);
2450: dump_cfg_fmtint(oForwardX11, o->forward_x11);
2451: dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
2452: dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
2453: #ifdef GSSAPI
2454: dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
2455: dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
2456: #endif /* GSSAPI */
2457: dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
2458: dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
2459: dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
2460: dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
2461: dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
2462: dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
2463: dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
2464: dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
2465: dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
2466: dump_cfg_fmtint(oRequestTTY, o->request_tty);
2467: dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
2468: dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
2469: dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
2470: dump_cfg_fmtint(oTunnel, o->tun_open);
2471: dump_cfg_fmtint(oUsePrivilegedPort, o->use_privileged_port);
2472: dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
2473: dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
1.229 djm 2474: dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
1.221 djm 2475:
2476: /* Integer options */
2477: dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
2478: dump_cfg_int(oConnectionAttempts, o->connection_attempts);
2479: dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
2480: dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
2481: dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
2482: dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
2483:
2484: /* String options */
2485: dump_cfg_string(oBindAddress, o->bind_address);
2486: dump_cfg_string(oCiphers, o->ciphers ? o->ciphers : KEX_CLIENT_ENCRYPT);
2487: dump_cfg_string(oControlPath, o->control_path);
1.240 djm 2488: dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
1.221 djm 2489: dump_cfg_string(oHostKeyAlias, o->host_key_alias);
1.230 djm 2490: dump_cfg_string(oHostbasedKeyTypes, o->hostbased_key_types);
1.253 markus 2491: dump_cfg_string(oIdentityAgent, o->identity_agent);
1.221 djm 2492: dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
2493: dump_cfg_string(oKexAlgorithms, o->kex_algorithms ? o->kex_algorithms : KEX_CLIENT_KEX);
2494: dump_cfg_string(oLocalCommand, o->local_command);
2495: dump_cfg_string(oLogLevel, log_level_name(o->log_level));
2496: dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC);
1.266 djm 2497: #ifdef ENABLE_PKCS11
1.221 djm 2498: dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
1.266 djm 2499: #endif
1.221 djm 2500: dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
1.242 djm 2501: dump_cfg_string(oPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.230 djm 2502: dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
1.221 djm 2503: dump_cfg_string(oXAuthLocation, o->xauth_location);
2504:
1.230 djm 2505: /* Forwards */
1.221 djm 2506: dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
2507: dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
2508: dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
2509:
2510: /* String array options */
2511: dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
2512: dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
2513: dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
2514: dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
2515: dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
2516:
2517: /* Special cases */
2518:
2519: /* oConnectTimeout */
2520: if (o->connection_timeout == -1)
2521: printf("connecttimeout none\n");
2522: else
2523: dump_cfg_int(oConnectTimeout, o->connection_timeout);
2524:
2525: /* oTunnelDevice */
2526: printf("tunneldevice");
2527: if (o->tun_local == SSH_TUNID_ANY)
2528: printf(" any");
2529: else
2530: printf(" %d", o->tun_local);
2531: if (o->tun_remote == SSH_TUNID_ANY)
2532: printf(":any");
2533: else
2534: printf(":%d", o->tun_remote);
2535: printf("\n");
2536:
2537: /* oCanonicalizePermittedCNAMEs */
2538: if ( o->num_permitted_cnames > 0) {
2539: printf("canonicalizePermittedcnames");
2540: for (i = 0; i < o->num_permitted_cnames; i++) {
2541: printf(" %s:%s", o->permitted_cnames[i].source_list,
2542: o->permitted_cnames[i].target_list);
2543: }
2544: printf("\n");
2545: }
2546:
2547: /* oControlPersist */
2548: if (o->control_persist == 0 || o->control_persist_timeout == 0)
2549: dump_cfg_fmtint(oControlPersist, o->control_persist);
2550: else
2551: dump_cfg_int(oControlPersist, o->control_persist_timeout);
2552:
2553: /* oEscapeChar */
2554: if (o->escape_char == SSH_ESCAPECHAR_NONE)
2555: printf("escapechar none\n");
2556: else {
1.257 djm 2557: vis(buf, o->escape_char, VIS_WHITE, 0);
2558: printf("escapechar %s\n", buf);
1.221 djm 2559: }
2560:
2561: /* oIPQoS */
2562: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2563: printf("%s\n", iptos2str(o->ip_qos_bulk));
2564:
2565: /* oRekeyLimit */
1.249 dtucker 2566: printf("rekeylimit %llu %d\n",
2567: (unsigned long long)o->rekey_limit, o->rekey_interval);
1.221 djm 2568:
2569: /* oStreamLocalBindMask */
2570: printf("streamlocalbindmask 0%o\n",
2571: o->fwd_opts.streamlocal_bind_mask);
1.257 djm 2572:
2573: /* oProxyCommand / oProxyJump */
2574: if (o->jump_host == NULL)
2575: dump_cfg_string(oProxyCommand, o->proxy_command);
2576: else {
2577: /* Check for numeric addresses */
2578: i = strchr(o->jump_host, ':') != NULL ||
2579: strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
2580: snprintf(buf, sizeof(buf), "%d", o->jump_port);
2581: printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
1.259 djm 2582: /* optional additional jump spec */
2583: o->jump_extra == NULL ? "" : o->jump_extra,
2584: o->jump_extra == NULL ? "" : ",",
1.257 djm 2585: /* optional user */
2586: o->jump_user == NULL ? "" : o->jump_user,
2587: o->jump_user == NULL ? "" : "@",
2588: /* opening [ if hostname is numeric */
2589: i ? "[" : "",
2590: /* mandatory hostname */
2591: o->jump_host,
2592: /* closing ] if hostname is numeric */
2593: i ? "]" : "",
2594: /* optional port number */
2595: o->jump_port <= 0 ? "" : ":",
1.259 djm 2596: o->jump_port <= 0 ? "" : buf);
1.257 djm 2597: }
1.1 deraadt 2598: }
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