Annotation of src/usr.bin/ssh/readconf.c, Revision 1.277
1.277 ! bluhm 1: /* $OpenBSD: readconf.c,v 1.276 2017/05/20 02:35:47 djm Exp $ */
1.1 deraadt 2: /*
1.18 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Functions for reading the configuration files.
1.26 markus 7: *
1.46 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 13: */
1.1 deraadt 14:
1.147 stevesk 15: #include <sys/types.h>
16: #include <sys/stat.h>
1.152 stevesk 17: #include <sys/socket.h>
1.206 djm 18: #include <sys/wait.h>
1.220 millert 19: #include <sys/un.h>
1.152 stevesk 20:
21: #include <netinet/in.h>
1.190 djm 22: #include <netinet/ip.h>
1.148 stevesk 23:
24: #include <ctype.h>
1.154 stevesk 25: #include <errno.h>
1.206 djm 26: #include <fcntl.h>
1.252 djm 27: #include <glob.h>
1.155 stevesk 28: #include <netdb.h>
1.206 djm 29: #include <paths.h>
30: #include <pwd.h>
1.159 deraadt 31: #include <signal.h>
1.158 stevesk 32: #include <stdio.h>
1.157 stevesk 33: #include <string.h>
1.156 stevesk 34: #include <unistd.h>
1.228 deraadt 35: #include <limits.h>
1.200 dtucker 36: #include <util.h>
1.221 djm 37: #include <vis.h>
1.1 deraadt 38:
1.159 deraadt 39: #include "xmalloc.h"
1.1 deraadt 40: #include "ssh.h"
1.25 markus 41: #include "compat.h"
1.58 markus 42: #include "cipher.h"
1.55 markus 43: #include "pathnames.h"
1.58 markus 44: #include "log.h"
1.227 djm 45: #include "sshkey.h"
1.220 millert 46: #include "misc.h"
1.58 markus 47: #include "readconf.h"
48: #include "match.h"
1.62 markus 49: #include "kex.h"
50: #include "mac.h"
1.206 djm 51: #include "uidswap.h"
1.221 djm 52: #include "myproposal.h"
1.224 djm 53: #include "digest.h"
1.1 deraadt 54:
55: /* Format of the configuration file:
56:
57: # Configuration data is parsed as follows:
58: # 1. command line options
59: # 2. user-specific file
60: # 3. system-wide file
61: # Any configuration value is only changed the first time it is set.
62: # Thus, host-specific definitions should be at the beginning of the
63: # configuration file, and defaults at the end.
64:
65: # Host-specific declarations. These may override anything above. A single
66: # host may match multiple declarations; these are processed in the order
67: # that they are given in.
68:
69: Host *.ngs.fi ngs.fi
1.96 markus 70: User foo
1.1 deraadt 71:
72: Host fake.com
73: HostName another.host.name.real.org
74: User blaah
75: Port 34289
76: ForwardX11 no
77: ForwardAgent no
78:
79: Host books.com
80: RemoteForward 9999 shadows.cs.hut.fi:9999
1.266 djm 81: Ciphers 3des-cbc
1.1 deraadt 82:
83: Host fascist.blob.com
84: Port 23123
85: User tylonen
86: PasswordAuthentication no
87:
88: Host puukko.hut.fi
89: User t35124p
90: ProxyCommand ssh-proxy %h %p
91:
92: Host *.fr
1.96 markus 93: PublicKeyAuthentication no
1.1 deraadt 94:
95: Host *.su
1.266 djm 96: Ciphers aes128-ctr
1.1 deraadt 97: PasswordAuthentication no
98:
1.144 reyk 99: Host vpn.fake.com
100: Tunnel yes
101: TunnelDevice 3
102:
1.1 deraadt 103: # Defaults for various options
104: Host *
105: ForwardAgent no
1.50 markus 106: ForwardX11 no
1.1 deraadt 107: PasswordAuthentication yes
108: RSAAuthentication yes
109: RhostsRSAAuthentication yes
110: StrictHostKeyChecking yes
1.126 markus 111: TcpKeepAlive no
1.1 deraadt 112: IdentityFile ~/.ssh/identity
113: Port 22
114: EscapeChar ~
115:
116: */
117:
1.252 djm 118: static int read_config_file_depth(const char *filename, struct passwd *pw,
119: const char *host, const char *original_host, Options *options,
120: int flags, int *activep, int depth);
121: static int process_config_line_depth(Options *options, struct passwd *pw,
122: const char *host, const char *original_host, char *line,
123: const char *filename, int linenum, int *activep, int flags, int depth);
124:
1.1 deraadt 125: /* Keyword tokens. */
126:
1.17 markus 127: typedef enum {
128: oBadOption,
1.252 djm 129: oHost, oMatch, oInclude,
1.186 djm 130: oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
131: oGatewayPorts, oExitOnForwardFailure,
1.100 deraadt 132: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 133: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 134: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
1.253 markus 135: oCertificateFile, oAddKeysToAgent, oIdentityAgent,
1.206 djm 136: oUser, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
1.17 markus 137: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
138: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 139: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.273 djm 140: oUsePrivilegedPort, oLogFacility, oLogLevel, oCiphers, oMacs,
1.221 djm 141: oPubkeyAuthentication,
1.67 markus 142: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 143: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.183 markus 144: oHostKeyAlgorithms, oBindAddress, oPKCS11Provider,
1.96 markus 145: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 146: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 147: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 148: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.187 djm 149: oSendEnv, oControlPath, oControlMaster, oControlPersist,
150: oHashKnownHosts,
1.277 ! bluhm 151: oTunnel, oTunnelDevice,
! 152: oLocalCommand, oPermitLocalCommand, oRemoteCommand,
1.248 markus 153: oVisualHostKey,
1.205 djm 154: oKexAlgorithms, oIPQoS, oRequestTTY, oIgnoreUnknown, oProxyUseFdpass,
1.209 djm 155: oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
156: oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
1.223 djm 157: oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
1.230 djm 158: oFingerprintHash, oUpdateHostkeys, oHostbasedKeyTypes,
1.257 djm 159: oPubkeyAcceptedKeyTypes, oProxyJump,
1.273 djm 160: oIgnore, oIgnoredUnknownOption, oDeprecated, oUnsupported
1.1 deraadt 161: } OpCodes;
162:
163: /* Textual representations of the tokens. */
164:
1.17 markus 165: static struct {
166: const char *name;
167: OpCodes opcode;
168: } keywords[] = {
1.266 djm 169: /* Deprecated options */
1.273 djm 170: { "protocol", oIgnore }, /* NB. silently ignored */
1.274 djm 171: { "cipher", oDeprecated },
1.266 djm 172: { "fallbacktorsh", oDeprecated },
173: { "globalknownhostsfile2", oDeprecated },
174: { "rhostsauthentication", oDeprecated },
175: { "userknownhostsfile2", oDeprecated },
176: { "useroaming", oDeprecated },
177: { "usersh", oDeprecated },
178:
179: /* Unsupported options */
180: { "afstokenpassing", oUnsupported },
181: { "kerberosauthentication", oUnsupported },
182: { "kerberostgtpassing", oUnsupported },
183:
184: /* Sometimes-unsupported options */
185: #if defined(GSSAPI)
186: { "gssapiauthentication", oGssAuthentication },
187: { "gssapidelegatecredentials", oGssDelegateCreds },
188: # else
189: { "gssapiauthentication", oUnsupported },
190: { "gssapidelegatecredentials", oUnsupported },
191: #endif
192: #ifdef ENABLE_PKCS11
193: { "smartcarddevice", oPKCS11Provider },
194: { "pkcs11provider", oPKCS11Provider },
195: # else
196: { "smartcarddevice", oUnsupported },
197: { "pkcs11provider", oUnsupported },
198: #endif
199: { "rsaauthentication", oUnsupported },
200: { "rhostsrsaauthentication", oUnsupported },
201: { "compressionlevel", oUnsupported },
202:
1.17 markus 203: { "forwardagent", oForwardAgent },
204: { "forwardx11", oForwardX11 },
1.123 markus 205: { "forwardx11trusted", oForwardX11Trusted },
1.186 djm 206: { "forwardx11timeout", oForwardX11Timeout },
1.153 markus 207: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 208: { "xauthlocation", oXAuthLocation },
1.17 markus 209: { "gatewayports", oGatewayPorts },
210: { "useprivilegedport", oUsePrivilegedPort },
211: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 212: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
213: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.50 markus 214: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 215: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.73 markus 216: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 217: { "challengeresponseauthentication", oChallengeResponseAuthentication },
218: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
219: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.17 markus 220: { "identityfile", oIdentityFile },
1.174 stevesk 221: { "identityfile2", oIdentityFile }, /* obsolete */
1.128 markus 222: { "identitiesonly", oIdentitiesOnly },
1.241 djm 223: { "certificatefile", oCertificateFile },
1.246 jcs 224: { "addkeystoagent", oAddKeysToAgent },
1.253 markus 225: { "identityagent", oIdentityAgent },
1.17 markus 226: { "hostname", oHostName },
1.52 markus 227: { "hostkeyalias", oHostKeyAlias },
1.17 markus 228: { "proxycommand", oProxyCommand },
229: { "port", oPort },
1.25 markus 230: { "ciphers", oCiphers },
1.62 markus 231: { "macs", oMacs },
1.17 markus 232: { "remoteforward", oRemoteForward },
233: { "localforward", oLocalForward },
234: { "user", oUser },
235: { "host", oHost },
1.206 djm 236: { "match", oMatch },
1.17 markus 237: { "escapechar", oEscapeChar },
238: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.174 stevesk 239: { "userknownhostsfile", oUserKnownHostsFile },
1.17 markus 240: { "connectionattempts", oConnectionAttempts },
241: { "batchmode", oBatchMode },
242: { "checkhostip", oCheckHostIP },
243: { "stricthostkeychecking", oStrictHostKeyChecking },
244: { "compression", oCompression },
1.126 markus 245: { "tcpkeepalive", oTCPKeepAlive },
246: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 247: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
1.271 dtucker 248: { "syslogfacility", oLogFacility },
1.17 markus 249: { "loglevel", oLogLevel },
1.71 markus 250: { "dynamicforward", oDynamicForward },
1.67 markus 251: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 252: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 253: { "bindaddress", oBindAddress },
1.93 deraadt 254: { "clearallforwardings", oClearAllForwardings },
1.101 markus 255: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 256: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 257: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 258: { "rekeylimit", oRekeyLimit },
1.111 djm 259: { "connecttimeout", oConnectTimeout },
1.112 djm 260: { "addressfamily", oAddressFamily },
1.127 markus 261: { "serveraliveinterval", oServerAliveInterval },
262: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 263: { "sendenv", oSendEnv },
1.132 djm 264: { "controlpath", oControlPath },
265: { "controlmaster", oControlMaster },
1.187 djm 266: { "controlpersist", oControlPersist },
1.136 djm 267: { "hashknownhosts", oHashKnownHosts },
1.252 djm 268: { "include", oInclude },
1.144 reyk 269: { "tunnel", oTunnel },
270: { "tunneldevice", oTunnelDevice },
271: { "localcommand", oLocalCommand },
272: { "permitlocalcommand", oPermitLocalCommand },
1.277 ! bluhm 273: { "remotecommand", oRemoteCommand },
1.167 grunk 274: { "visualhostkey", oVisualHostKey },
1.189 djm 275: { "kexalgorithms", oKexAlgorithms },
1.190 djm 276: { "ipqos", oIPQoS },
1.192 djm 277: { "requesttty", oRequestTTY },
1.205 djm 278: { "proxyusefdpass", oProxyUseFdpass },
1.208 djm 279: { "canonicaldomains", oCanonicalDomains },
1.209 djm 280: { "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
281: { "canonicalizehostname", oCanonicalizeHostname },
282: { "canonicalizemaxdots", oCanonicalizeMaxDots },
283: { "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
1.220 millert 284: { "streamlocalbindmask", oStreamLocalBindMask },
285: { "streamlocalbindunlink", oStreamLocalBindUnlink },
1.223 djm 286: { "revokedhostkeys", oRevokedHostKeys },
1.224 djm 287: { "fingerprinthash", oFingerprintHash },
1.229 djm 288: { "updatehostkeys", oUpdateHostkeys },
1.230 djm 289: { "hostbasedkeytypes", oHostbasedKeyTypes },
1.238 markus 290: { "pubkeyacceptedkeytypes", oPubkeyAcceptedKeyTypes },
1.199 djm 291: { "ignoreunknown", oIgnoreUnknown },
1.257 djm 292: { "proxyjump", oProxyJump },
1.171 djm 293:
1.92 stevesk 294: { NULL, oBadOption }
1.13 markus 295: };
296:
1.19 markus 297: /*
298: * Adds a local TCP/IP port forward to options. Never returns if there is an
299: * error.
300: */
1.1 deraadt 301:
1.26 markus 302: void
1.220 millert 303: add_local_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 304: {
1.220 millert 305: struct Forward *fwd;
1.17 markus 306: extern uid_t original_real_uid;
1.251 djm 307: int i;
1.185 djm 308:
1.262 jsg 309: if (!bind_permitted(newfwd->listen_port, original_real_uid) &&
1.220 millert 310: newfwd->listen_path == NULL)
1.64 millert 311: fatal("Privileged ports can only be forwarded by root.");
1.251 djm 312: /* Don't add duplicates */
313: for (i = 0; i < options->num_local_forwards; i++) {
314: if (forward_equals(newfwd, options->local_forwards + i))
315: return;
316: }
1.234 deraadt 317: options->local_forwards = xreallocarray(options->local_forwards,
1.185 djm 318: options->num_local_forwards + 1,
319: sizeof(*options->local_forwards));
1.17 markus 320: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 321:
1.172 stevesk 322: fwd->listen_host = newfwd->listen_host;
1.135 djm 323: fwd->listen_port = newfwd->listen_port;
1.220 millert 324: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 325: fwd->connect_host = newfwd->connect_host;
1.135 djm 326: fwd->connect_port = newfwd->connect_port;
1.220 millert 327: fwd->connect_path = newfwd->connect_path;
1.1 deraadt 328: }
329:
1.19 markus 330: /*
331: * Adds a remote TCP/IP port forward to options. Never returns if there is
332: * an error.
333: */
1.1 deraadt 334:
1.26 markus 335: void
1.220 millert 336: add_remote_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 337: {
1.220 millert 338: struct Forward *fwd;
1.251 djm 339: int i;
1.185 djm 340:
1.251 djm 341: /* Don't add duplicates */
342: for (i = 0; i < options->num_remote_forwards; i++) {
343: if (forward_equals(newfwd, options->remote_forwards + i))
344: return;
345: }
1.234 deraadt 346: options->remote_forwards = xreallocarray(options->remote_forwards,
1.185 djm 347: options->num_remote_forwards + 1,
348: sizeof(*options->remote_forwards));
1.17 markus 349: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 350:
1.172 stevesk 351: fwd->listen_host = newfwd->listen_host;
1.135 djm 352: fwd->listen_port = newfwd->listen_port;
1.220 millert 353: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 354: fwd->connect_host = newfwd->connect_host;
1.135 djm 355: fwd->connect_port = newfwd->connect_port;
1.220 millert 356: fwd->connect_path = newfwd->connect_path;
1.194 markus 357: fwd->handle = newfwd->handle;
1.184 markus 358: fwd->allocated_port = 0;
1.1 deraadt 359: }
360:
1.90 stevesk 361: static void
362: clear_forwardings(Options *options)
363: {
364: int i;
365:
1.135 djm 366: for (i = 0; i < options->num_local_forwards; i++) {
1.202 djm 367: free(options->local_forwards[i].listen_host);
1.220 millert 368: free(options->local_forwards[i].listen_path);
1.202 djm 369: free(options->local_forwards[i].connect_host);
1.220 millert 370: free(options->local_forwards[i].connect_path);
1.135 djm 371: }
1.185 djm 372: if (options->num_local_forwards > 0) {
1.202 djm 373: free(options->local_forwards);
1.185 djm 374: options->local_forwards = NULL;
375: }
1.90 stevesk 376: options->num_local_forwards = 0;
1.135 djm 377: for (i = 0; i < options->num_remote_forwards; i++) {
1.202 djm 378: free(options->remote_forwards[i].listen_host);
1.220 millert 379: free(options->remote_forwards[i].listen_path);
1.202 djm 380: free(options->remote_forwards[i].connect_host);
1.220 millert 381: free(options->remote_forwards[i].connect_path);
1.135 djm 382: }
1.185 djm 383: if (options->num_remote_forwards > 0) {
1.202 djm 384: free(options->remote_forwards);
1.185 djm 385: options->remote_forwards = NULL;
386: }
1.90 stevesk 387: options->num_remote_forwards = 0;
1.145 reyk 388: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 389: }
390:
1.195 dtucker 391: void
1.241 djm 392: add_certificate_file(Options *options, const char *path, int userprovided)
393: {
394: int i;
395:
396: if (options->num_certificate_files >= SSH_MAX_CERTIFICATE_FILES)
397: fatal("Too many certificate files specified (max %d)",
398: SSH_MAX_CERTIFICATE_FILES);
399:
400: /* Avoid registering duplicates */
401: for (i = 0; i < options->num_certificate_files; i++) {
402: if (options->certificate_file_userprovided[i] == userprovided &&
403: strcmp(options->certificate_files[i], path) == 0) {
404: debug2("%s: ignoring duplicate key %s", __func__, path);
405: return;
406: }
407: }
408:
409: options->certificate_file_userprovided[options->num_certificate_files] =
410: userprovided;
411: options->certificate_files[options->num_certificate_files++] =
412: xstrdup(path);
413: }
414:
415: void
1.195 dtucker 416: add_identity_file(Options *options, const char *dir, const char *filename,
417: int userprovided)
418: {
419: char *path;
1.219 djm 420: int i;
1.195 dtucker 421:
422: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
423: fatal("Too many identity files specified (max %d)",
424: SSH_MAX_IDENTITY_FILES);
425:
426: if (dir == NULL) /* no dir, filename is absolute */
427: path = xstrdup(filename);
1.276 djm 428: else if (xasprintf(&path, "%s%s", dir, filename) >= PATH_MAX)
429: fatal("Identity file path %s too long", path);
1.219 djm 430:
431: /* Avoid registering duplicates */
432: for (i = 0; i < options->num_identity_files; i++) {
433: if (options->identity_file_userprovided[i] == userprovided &&
434: strcmp(options->identity_files[i], path) == 0) {
435: debug2("%s: ignoring duplicate key %s", __func__, path);
436: free(path);
437: return;
438: }
439: }
1.195 dtucker 440:
441: options->identity_file_userprovided[options->num_identity_files] =
442: userprovided;
443: options->identity_files[options->num_identity_files++] = path;
444: }
445:
1.206 djm 446: int
447: default_ssh_port(void)
448: {
449: static int port;
450: struct servent *sp;
451:
452: if (port == 0) {
453: sp = getservbyname(SSH_SERVICE_NAME, "tcp");
454: port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
455: }
456: return port;
457: }
458:
459: /*
460: * Execute a command in a shell.
461: * Return its exit status or -1 on abnormal exit.
462: */
463: static int
464: execute_in_shell(const char *cmd)
465: {
1.243 dtucker 466: char *shell;
1.206 djm 467: pid_t pid;
468: int devnull, status;
469: extern uid_t original_real_uid;
470:
471: if ((shell = getenv("SHELL")) == NULL)
472: shell = _PATH_BSHELL;
473:
474: /* Need this to redirect subprocess stdin/out */
475: if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
476: fatal("open(/dev/null): %s", strerror(errno));
477:
478: debug("Executing command: '%.500s'", cmd);
479:
480: /* Fork and execute the command. */
481: if ((pid = fork()) == 0) {
1.245 djm 482: char *argv[4];
1.206 djm 483:
484: /* Child. Permanently give up superuser privileges. */
485: permanently_drop_suid(original_real_uid);
486:
487: /* Redirect child stdin and stdout. Leave stderr */
488: if (dup2(devnull, STDIN_FILENO) == -1)
489: fatal("dup2: %s", strerror(errno));
490: if (dup2(devnull, STDOUT_FILENO) == -1)
491: fatal("dup2: %s", strerror(errno));
492: if (devnull > STDERR_FILENO)
493: close(devnull);
494: closefrom(STDERR_FILENO + 1);
1.245 djm 495:
496: argv[0] = shell;
497: argv[1] = "-c";
498: argv[2] = xstrdup(cmd);
499: argv[3] = NULL;
1.206 djm 500:
501: execv(argv[0], argv);
502: error("Unable to execute '%.100s': %s", cmd, strerror(errno));
503: /* Die with signal to make this error apparent to parent. */
504: signal(SIGTERM, SIG_DFL);
505: kill(getpid(), SIGTERM);
506: _exit(1);
507: }
508: /* Parent. */
509: if (pid < 0)
510: fatal("%s: fork: %.100s", __func__, strerror(errno));
511:
512: close(devnull);
513:
514: while (waitpid(pid, &status, 0) == -1) {
515: if (errno != EINTR && errno != EAGAIN)
516: fatal("%s: waitpid: %s", __func__, strerror(errno));
517: }
518: if (!WIFEXITED(status)) {
519: error("command '%.100s' exited abnormally", cmd);
520: return -1;
1.221 djm 521: }
1.206 djm 522: debug3("command returned status %d", WEXITSTATUS(status));
523: return WEXITSTATUS(status);
524: }
525:
526: /*
527: * Parse and execute a Match directive.
528: */
529: static int
530: match_cfg_line(Options *options, char **condition, struct passwd *pw,
1.221 djm 531: const char *host_arg, const char *original_host, int post_canon,
532: const char *filename, int linenum)
1.206 djm 533: {
1.221 djm 534: char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria;
1.211 djm 535: const char *ruser;
1.221 djm 536: int r, port, this_result, result = 1, attributes = 0, negate;
1.206 djm 537: char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
538:
539: /*
540: * Configuration is likely to be incomplete at this point so we
541: * must be prepared to use default values.
542: */
543: port = options->port <= 0 ? default_ssh_port() : options->port;
544: ruser = options->user == NULL ? pw->pw_name : options->user;
1.250 djm 545: if (post_canon) {
546: host = xstrdup(options->hostname);
547: } else if (options->hostname != NULL) {
1.212 djm 548: /* NB. Please keep in sync with ssh.c:main() */
1.211 djm 549: host = percent_expand(options->hostname,
550: "h", host_arg, (char *)NULL);
1.250 djm 551: } else {
1.211 djm 552: host = xstrdup(host_arg);
1.250 djm 553: }
1.206 djm 554:
1.221 djm 555: debug2("checking match for '%s' host %s originally %s",
556: cp, host, original_host);
557: while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') {
558: criteria = NULL;
559: this_result = 1;
560: if ((negate = attrib[0] == '!'))
561: attrib++;
562: /* criteria "all" and "canonical" have no argument */
1.213 dtucker 563: if (strcasecmp(attrib, "all") == 0) {
1.221 djm 564: if (attributes > 1 ||
1.213 dtucker 565: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
1.221 djm 566: error("%.200s line %d: '%s' cannot be combined "
567: "with other Match attributes",
568: filename, linenum, oattrib);
1.213 dtucker 569: result = -1;
570: goto out;
571: }
1.221 djm 572: if (result)
573: result = negate ? 0 : 1;
1.213 dtucker 574: goto out;
575: }
1.221 djm 576: attributes++;
577: if (strcasecmp(attrib, "canonical") == 0) {
578: r = !!post_canon; /* force bitmask member to boolean */
579: if (r == (negate ? 1 : 0))
580: this_result = result = 0;
581: debug3("%.200s line %d: %smatched '%s'",
582: filename, linenum,
583: this_result ? "" : "not ", oattrib);
584: continue;
585: }
586: /* All other criteria require an argument */
1.206 djm 587: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
588: error("Missing Match criteria for %s", attrib);
1.211 djm 589: result = -1;
590: goto out;
1.206 djm 591: }
592: if (strcasecmp(attrib, "host") == 0) {
1.221 djm 593: criteria = xstrdup(host);
1.235 djm 594: r = match_hostname(host, arg) == 1;
1.221 djm 595: if (r == (negate ? 1 : 0))
596: this_result = result = 0;
1.206 djm 597: } else if (strcasecmp(attrib, "originalhost") == 0) {
1.221 djm 598: criteria = xstrdup(original_host);
1.235 djm 599: r = match_hostname(original_host, arg) == 1;
1.221 djm 600: if (r == (negate ? 1 : 0))
601: this_result = result = 0;
1.206 djm 602: } else if (strcasecmp(attrib, "user") == 0) {
1.221 djm 603: criteria = xstrdup(ruser);
1.235 djm 604: r = match_pattern_list(ruser, arg, 0) == 1;
1.221 djm 605: if (r == (negate ? 1 : 0))
606: this_result = result = 0;
1.206 djm 607: } else if (strcasecmp(attrib, "localuser") == 0) {
1.221 djm 608: criteria = xstrdup(pw->pw_name);
1.235 djm 609: r = match_pattern_list(pw->pw_name, arg, 0) == 1;
1.221 djm 610: if (r == (negate ? 1 : 0))
611: this_result = result = 0;
1.210 djm 612: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 613: if (gethostname(thishost, sizeof(thishost)) == -1)
614: fatal("gethostname: %s", strerror(errno));
615: strlcpy(shorthost, thishost, sizeof(shorthost));
616: shorthost[strcspn(thishost, ".")] = '\0';
617: snprintf(portstr, sizeof(portstr), "%d", port);
618:
619: cmd = percent_expand(arg,
620: "L", shorthost,
621: "d", pw->pw_dir,
622: "h", host,
623: "l", thishost,
1.221 djm 624: "n", original_host,
1.206 djm 625: "p", portstr,
626: "r", ruser,
627: "u", pw->pw_name,
628: (char *)NULL);
1.217 djm 629: if (result != 1) {
630: /* skip execution if prior predicate failed */
1.221 djm 631: debug3("%.200s line %d: skipped exec "
632: "\"%.100s\"", filename, linenum, cmd);
633: free(cmd);
634: continue;
635: }
636: r = execute_in_shell(cmd);
637: if (r == -1) {
638: fatal("%.200s line %d: match exec "
639: "'%.100s' error", filename,
640: linenum, cmd);
1.217 djm 641: }
1.221 djm 642: criteria = xstrdup(cmd);
1.206 djm 643: free(cmd);
1.221 djm 644: /* Force exit status to boolean */
645: r = r == 0;
646: if (r == (negate ? 1 : 0))
647: this_result = result = 0;
1.206 djm 648: } else {
649: error("Unsupported Match attribute %s", attrib);
1.211 djm 650: result = -1;
651: goto out;
1.206 djm 652: }
1.221 djm 653: debug3("%.200s line %d: %smatched '%s \"%.100s\"' ",
654: filename, linenum, this_result ? "": "not ",
655: oattrib, criteria);
656: free(criteria);
1.213 dtucker 657: }
658: if (attributes == 0) {
659: error("One or more attributes required for Match");
660: result = -1;
661: goto out;
1.206 djm 662: }
1.221 djm 663: out:
664: if (result != -1)
665: debug2("match %sfound", result ? "" : "not ");
1.206 djm 666: *condition = cp;
1.211 djm 667: free(host);
1.206 djm 668: return result;
669: }
670:
1.208 djm 671: /* Check and prepare a domain name: removes trailing '.' and lowercases */
672: static void
673: valid_domain(char *name, const char *filename, int linenum)
674: {
675: size_t i, l = strlen(name);
676: u_char c, last = '\0';
677:
678: if (l == 0)
679: fatal("%s line %d: empty hostname suffix", filename, linenum);
680: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
681: fatal("%s line %d: hostname suffix \"%.100s\" "
682: "starts with invalid character", filename, linenum, name);
683: for (i = 0; i < l; i++) {
684: c = tolower((u_char)name[i]);
685: name[i] = (char)c;
686: if (last == '.' && c == '.')
687: fatal("%s line %d: hostname suffix \"%.100s\" contains "
688: "consecutive separators", filename, linenum, name);
689: if (c != '.' && c != '-' && !isalnum(c) &&
690: c != '_') /* technically invalid, but common */
691: fatal("%s line %d: hostname suffix \"%.100s\" contains "
692: "invalid characters", filename, linenum, name);
693: last = c;
694: }
695: if (name[l - 1] == '.')
696: name[l - 1] = '\0';
697: }
698:
1.19 markus 699: /*
1.70 stevesk 700: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 701: */
1.26 markus 702: static OpCodes
1.199 djm 703: parse_token(const char *cp, const char *filename, int linenum,
704: const char *ignored_unknown)
1.1 deraadt 705: {
1.199 djm 706: int i;
1.1 deraadt 707:
1.17 markus 708: for (i = 0; keywords[i].name; i++)
1.199 djm 709: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 710: return keywords[i].opcode;
1.235 djm 711: if (ignored_unknown != NULL &&
712: match_pattern_list(cp, ignored_unknown, 1) == 1)
1.199 djm 713: return oIgnoredUnknownOption;
1.75 stevesk 714: error("%s: line %d: Bad configuration option: %s",
715: filename, linenum, cp);
1.17 markus 716: return oBadOption;
1.1 deraadt 717: }
718:
1.207 djm 719: /* Multistate option parsing */
720: struct multistate {
721: char *key;
722: int value;
723: };
724: static const struct multistate multistate_flag[] = {
725: { "true", 1 },
726: { "false", 0 },
727: { "yes", 1 },
728: { "no", 0 },
729: { NULL, -1 }
730: };
731: static const struct multistate multistate_yesnoask[] = {
732: { "true", 1 },
733: { "false", 0 },
734: { "yes", 1 },
735: { "no", 0 },
736: { "ask", 2 },
737: { NULL, -1 }
738: };
1.246 jcs 739: static const struct multistate multistate_yesnoaskconfirm[] = {
740: { "true", 1 },
741: { "false", 0 },
742: { "yes", 1 },
743: { "no", 0 },
744: { "ask", 2 },
745: { "confirm", 3 },
746: { NULL, -1 }
747: };
1.207 djm 748: static const struct multistate multistate_addressfamily[] = {
749: { "inet", AF_INET },
750: { "inet6", AF_INET6 },
751: { "any", AF_UNSPEC },
752: { NULL, -1 }
753: };
754: static const struct multistate multistate_controlmaster[] = {
755: { "true", SSHCTL_MASTER_YES },
756: { "yes", SSHCTL_MASTER_YES },
757: { "false", SSHCTL_MASTER_NO },
758: { "no", SSHCTL_MASTER_NO },
759: { "auto", SSHCTL_MASTER_AUTO },
760: { "ask", SSHCTL_MASTER_ASK },
761: { "autoask", SSHCTL_MASTER_AUTO_ASK },
762: { NULL, -1 }
763: };
764: static const struct multistate multistate_tunnel[] = {
765: { "ethernet", SSH_TUNMODE_ETHERNET },
766: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
767: { "true", SSH_TUNMODE_DEFAULT },
768: { "yes", SSH_TUNMODE_DEFAULT },
769: { "false", SSH_TUNMODE_NO },
770: { "no", SSH_TUNMODE_NO },
771: { NULL, -1 }
772: };
773: static const struct multistate multistate_requesttty[] = {
774: { "true", REQUEST_TTY_YES },
775: { "yes", REQUEST_TTY_YES },
776: { "false", REQUEST_TTY_NO },
777: { "no", REQUEST_TTY_NO },
778: { "force", REQUEST_TTY_FORCE },
779: { "auto", REQUEST_TTY_AUTO },
780: { NULL, -1 }
781: };
1.209 djm 782: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 783: { "true", SSH_CANONICALISE_YES },
784: { "false", SSH_CANONICALISE_NO },
785: { "yes", SSH_CANONICALISE_YES },
786: { "no", SSH_CANONICALISE_NO },
787: { "always", SSH_CANONICALISE_ALWAYS },
788: { NULL, -1 }
789: };
1.207 djm 790:
1.19 markus 791: /*
792: * Processes a single option line as used in the configuration files. This
793: * only sets those values that have not already been set.
794: */
1.14 markus 795: int
1.206 djm 796: process_config_line(Options *options, struct passwd *pw, const char *host,
1.221 djm 797: const char *original_host, char *line, const char *filename,
798: int linenum, int *activep, int flags)
1.1 deraadt 799: {
1.252 djm 800: return process_config_line_depth(options, pw, host, original_host,
801: line, filename, linenum, activep, flags, 0);
802: }
803:
804: #define WHITESPACE " \t\r\n"
805: static int
806: process_config_line_depth(Options *options, struct passwd *pw, const char *host,
807: const char *original_host, char *line, const char *filename,
808: int linenum, int *activep, int flags, int depth)
809: {
1.193 djm 810: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
811: char **cpptr, fwdarg[256];
1.199 djm 812: u_int i, *uintptr, max_entries = 0;
1.252 djm 813: int r, oactive, negated, opcode, *intptr, value, value2, cmdline = 0;
1.164 dtucker 814: LogLevel *log_level_ptr;
1.271 dtucker 815: SyslogFacility *log_facility_ptr;
1.201 dtucker 816: long long val64;
1.102 markus 817: size_t len;
1.220 millert 818: struct Forward fwd;
1.207 djm 819: const struct multistate *multistate_ptr;
1.208 djm 820: struct allowed_cname *cname;
1.252 djm 821: glob_t gl;
1.106 djm 822:
1.206 djm 823: if (activep == NULL) { /* We are processing a command line directive */
824: cmdline = 1;
825: activep = &cmdline;
826: }
827:
1.267 djm 828: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1.233 djm 829: if ((len = strlen(line)) == 0)
830: return 0;
831: for (len--; len > 0; len--) {
1.267 djm 832: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1.106 djm 833: break;
834: line[len] = '\0';
835: }
1.1 deraadt 836:
1.42 provos 837: s = line;
838: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 839: if ((keyword = strdelim(&s)) == NULL)
840: return 0;
1.42 provos 841: /* Ignore leading whitespace. */
842: if (*keyword == '\0')
1.43 markus 843: keyword = strdelim(&s);
1.56 deraadt 844: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 845: return 0;
1.199 djm 846: /* Match lowercase keyword */
1.207 djm 847: lowercase(keyword);
1.17 markus 848:
1.199 djm 849: opcode = parse_token(keyword, filename, linenum,
850: options->ignored_unknown);
1.17 markus 851:
852: switch (opcode) {
853: case oBadOption:
1.19 markus 854: /* don't panic, but count bad options */
855: return -1;
1.273 djm 856: case oIgnore:
857: return 0;
1.199 djm 858: case oIgnoredUnknownOption:
859: debug("%s line %d: Ignored unknown option \"%s\"",
860: filename, linenum, keyword);
861: return 0;
1.111 djm 862: case oConnectTimeout:
863: intptr = &options->connection_timeout;
1.127 markus 864: parse_time:
1.111 djm 865: arg = strdelim(&s);
866: if (!arg || *arg == '\0')
867: fatal("%s line %d: missing time value.",
868: filename, linenum);
1.221 djm 869: if (strcmp(arg, "none") == 0)
870: value = -1;
871: else if ((value = convtime(arg)) == -1)
1.111 djm 872: fatal("%s line %d: invalid time value.",
873: filename, linenum);
1.160 dtucker 874: if (*activep && *intptr == -1)
1.111 djm 875: *intptr = value;
876: break;
877:
1.17 markus 878: case oForwardAgent:
879: intptr = &options->forward_agent;
1.207 djm 880: parse_flag:
881: multistate_ptr = multistate_flag;
882: parse_multistate:
1.42 provos 883: arg = strdelim(&s);
1.40 ho 884: if (!arg || *arg == '\0')
1.207 djm 885: fatal("%s line %d: missing argument.",
886: filename, linenum);
887: value = -1;
888: for (i = 0; multistate_ptr[i].key != NULL; i++) {
889: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
890: value = multistate_ptr[i].value;
891: break;
892: }
893: }
894: if (value == -1)
895: fatal("%s line %d: unsupported option \"%s\".",
896: filename, linenum, arg);
1.17 markus 897: if (*activep && *intptr == -1)
898: *intptr = value;
899: break;
900:
901: case oForwardX11:
902: intptr = &options->forward_x11;
903: goto parse_flag;
904:
1.123 markus 905: case oForwardX11Trusted:
906: intptr = &options->forward_x11_trusted;
907: goto parse_flag;
1.221 djm 908:
1.186 djm 909: case oForwardX11Timeout:
910: intptr = &options->forward_x11_timeout;
911: goto parse_time;
1.123 markus 912:
1.17 markus 913: case oGatewayPorts:
1.220 millert 914: intptr = &options->fwd_opts.gateway_ports;
1.17 markus 915: goto parse_flag;
916:
1.153 markus 917: case oExitOnForwardFailure:
918: intptr = &options->exit_on_forward_failure;
919: goto parse_flag;
920:
1.17 markus 921: case oUsePrivilegedPort:
922: intptr = &options->use_privileged_port;
923: goto parse_flag;
924:
925: case oPasswordAuthentication:
926: intptr = &options->password_authentication;
927: goto parse_flag;
928:
1.48 markus 929: case oKbdInteractiveAuthentication:
930: intptr = &options->kbd_interactive_authentication;
931: goto parse_flag;
932:
933: case oKbdInteractiveDevices:
934: charptr = &options->kbd_interactive_devices;
935: goto parse_string;
936:
1.50 markus 937: case oPubkeyAuthentication:
938: intptr = &options->pubkey_authentication;
1.30 markus 939: goto parse_flag;
940:
1.72 markus 941: case oHostbasedAuthentication:
942: intptr = &options->hostbased_authentication;
943: goto parse_flag;
944:
1.59 markus 945: case oChallengeResponseAuthentication:
1.78 markus 946: intptr = &options->challenge_response_authentication;
1.17 markus 947: goto parse_flag;
1.108 jakob 948:
1.118 markus 949: case oGssAuthentication:
950: intptr = &options->gss_authentication;
951: goto parse_flag;
952:
953: case oGssDelegateCreds:
954: intptr = &options->gss_deleg_creds;
955: goto parse_flag;
956:
1.17 markus 957: case oBatchMode:
958: intptr = &options->batch_mode;
959: goto parse_flag;
960:
961: case oCheckHostIP:
962: intptr = &options->check_host_ip;
1.167 grunk 963: goto parse_flag;
1.17 markus 964:
1.107 jakob 965: case oVerifyHostKeyDNS:
966: intptr = &options->verify_host_key_dns;
1.207 djm 967: multistate_ptr = multistate_yesnoask;
968: goto parse_multistate;
1.107 jakob 969:
1.17 markus 970: case oStrictHostKeyChecking:
971: intptr = &options->strict_host_key_checking;
1.207 djm 972: multistate_ptr = multistate_yesnoask;
973: goto parse_multistate;
1.17 markus 974:
975: case oCompression:
976: intptr = &options->compression;
977: goto parse_flag;
978:
1.126 markus 979: case oTCPKeepAlive:
980: intptr = &options->tcp_keep_alive;
1.17 markus 981: goto parse_flag;
982:
1.91 markus 983: case oNoHostAuthenticationForLocalhost:
984: intptr = &options->no_host_authentication_for_localhost;
985: goto parse_flag;
986:
1.17 markus 987: case oNumberOfPasswordPrompts:
988: intptr = &options->number_of_password_prompts;
989: goto parse_int;
990:
1.105 markus 991: case oRekeyLimit:
992: arg = strdelim(&s);
993: if (!arg || *arg == '\0')
1.198 dtucker 994: fatal("%.200s line %d: Missing argument.", filename,
995: linenum);
996: if (strcmp(arg, "default") == 0) {
997: val64 = 0;
998: } else {
1.200 dtucker 999: if (scan_scaled(arg, &val64) == -1)
1000: fatal("%.200s line %d: Bad number '%s': %s",
1001: filename, linenum, arg, strerror(errno));
1.198 dtucker 1002: if (val64 != 0 && val64 < 16)
1003: fatal("%.200s line %d: RekeyLimit too small",
1004: filename, linenum);
1.105 markus 1005: }
1.165 djm 1006: if (*activep && options->rekey_limit == -1)
1.249 dtucker 1007: options->rekey_limit = val64;
1.198 dtucker 1008: if (s != NULL) { /* optional rekey interval present */
1009: if (strcmp(s, "none") == 0) {
1010: (void)strdelim(&s); /* discard */
1011: break;
1012: }
1013: intptr = &options->rekey_interval;
1014: goto parse_time;
1015: }
1.105 markus 1016: break;
1017:
1.17 markus 1018: case oIdentityFile:
1.42 provos 1019: arg = strdelim(&s);
1.40 ho 1020: if (!arg || *arg == '\0')
1.17 markus 1021: fatal("%.200s line %d: Missing argument.", filename, linenum);
1022: if (*activep) {
1.50 markus 1023: intptr = &options->num_identity_files;
1.27 markus 1024: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 1025: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 1026: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.221 djm 1027: add_identity_file(options, NULL,
1028: arg, flags & SSHCONF_USERCONF);
1.17 markus 1029: }
1030: break;
1031:
1.241 djm 1032: case oCertificateFile:
1033: arg = strdelim(&s);
1034: if (!arg || *arg == '\0')
1035: fatal("%.200s line %d: Missing argument.",
1036: filename, linenum);
1037: if (*activep) {
1038: intptr = &options->num_certificate_files;
1039: if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
1040: fatal("%.200s line %d: Too many certificate "
1041: "files specified (max %d).",
1042: filename, linenum,
1043: SSH_MAX_CERTIFICATE_FILES);
1044: }
1045: add_certificate_file(options, arg,
1046: flags & SSHCONF_USERCONF);
1047: }
1048: break;
1049:
1.34 markus 1050: case oXAuthLocation:
1051: charptr=&options->xauth_location;
1052: goto parse_string;
1053:
1.17 markus 1054: case oUser:
1055: charptr = &options->user;
1056: parse_string:
1.42 provos 1057: arg = strdelim(&s);
1.40 ho 1058: if (!arg || *arg == '\0')
1.193 djm 1059: fatal("%.200s line %d: Missing argument.",
1060: filename, linenum);
1.17 markus 1061: if (*activep && *charptr == NULL)
1.38 provos 1062: *charptr = xstrdup(arg);
1.17 markus 1063: break;
1064:
1065: case oGlobalKnownHostsFile:
1.193 djm 1066: cpptr = (char **)&options->system_hostfiles;
1067: uintptr = &options->num_system_hostfiles;
1068: max_entries = SSH_MAX_HOSTS_FILES;
1069: parse_char_array:
1070: if (*activep && *uintptr == 0) {
1071: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1072: if ((*uintptr) >= max_entries)
1073: fatal("%s line %d: "
1074: "too many authorized keys files.",
1075: filename, linenum);
1076: cpptr[(*uintptr)++] = xstrdup(arg);
1077: }
1078: }
1079: return 0;
1.17 markus 1080:
1081: case oUserKnownHostsFile:
1.193 djm 1082: cpptr = (char **)&options->user_hostfiles;
1083: uintptr = &options->num_user_hostfiles;
1084: max_entries = SSH_MAX_HOSTS_FILES;
1085: goto parse_char_array;
1.27 markus 1086:
1.17 markus 1087: case oHostName:
1088: charptr = &options->hostname;
1089: goto parse_string;
1090:
1.52 markus 1091: case oHostKeyAlias:
1092: charptr = &options->host_key_alias;
1093: goto parse_string;
1094:
1.67 markus 1095: case oPreferredAuthentications:
1096: charptr = &options->preferred_authentications;
1097: goto parse_string;
1098:
1.77 markus 1099: case oBindAddress:
1100: charptr = &options->bind_address;
1101: goto parse_string;
1102:
1.183 markus 1103: case oPKCS11Provider:
1104: charptr = &options->pkcs11_provider;
1.86 markus 1105: goto parse_string;
1.85 jakob 1106:
1.17 markus 1107: case oProxyCommand:
1.144 reyk 1108: charptr = &options->proxy_command;
1.257 djm 1109: /* Ignore ProxyCommand if ProxyJump already specified */
1110: if (options->jump_host != NULL)
1111: charptr = &options->jump_host; /* Skip below */
1.144 reyk 1112: parse_command:
1.113 markus 1113: if (s == NULL)
1114: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 1115: len = strspn(s, WHITESPACE "=");
1.17 markus 1116: if (*activep && *charptr == NULL)
1.102 markus 1117: *charptr = xstrdup(s + len);
1.17 markus 1118: return 0;
1119:
1.257 djm 1120: case oProxyJump:
1121: if (s == NULL) {
1122: fatal("%.200s line %d: Missing argument.",
1123: filename, linenum);
1124: }
1125: len = strspn(s, WHITESPACE "=");
1126: if (parse_jump(s + len, options, *activep) == -1) {
1127: fatal("%.200s line %d: Invalid ProxyJump \"%s\"",
1128: filename, linenum, s + len);
1129: }
1130: return 0;
1131:
1.17 markus 1132: case oPort:
1133: intptr = &options->port;
1134: parse_int:
1.42 provos 1135: arg = strdelim(&s);
1.40 ho 1136: if (!arg || *arg == '\0')
1.17 markus 1137: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1138: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 1139: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 1140:
1141: /* Octal, decimal, or hex format? */
1.38 provos 1142: value = strtol(arg, &endofnumber, 0);
1143: if (arg == endofnumber)
1.21 markus 1144: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 1145: if (*activep && *intptr == -1)
1146: *intptr = value;
1147: break;
1148:
1149: case oConnectionAttempts:
1150: intptr = &options->connection_attempts;
1151: goto parse_int;
1152:
1.25 markus 1153: case oCiphers:
1.42 provos 1154: arg = strdelim(&s);
1.40 ho 1155: if (!arg || *arg == '\0')
1.32 markus 1156: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1157: if (*arg != '-' && !ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.31 markus 1158: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1159: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1160: if (*activep && options->ciphers == NULL)
1.38 provos 1161: options->ciphers = xstrdup(arg);
1.25 markus 1162: break;
1163:
1.62 markus 1164: case oMacs:
1165: arg = strdelim(&s);
1166: if (!arg || *arg == '\0')
1167: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1168: if (*arg != '-' && !mac_valid(*arg == '+' ? arg + 1 : arg))
1.62 markus 1169: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1170: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1171: if (*activep && options->macs == NULL)
1172: options->macs = xstrdup(arg);
1173: break;
1174:
1.189 djm 1175: case oKexAlgorithms:
1176: arg = strdelim(&s);
1177: if (!arg || *arg == '\0')
1178: fatal("%.200s line %d: Missing argument.",
1179: filename, linenum);
1.268 djm 1180: if (*arg != '-' &&
1181: !kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.189 djm 1182: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1183: filename, linenum, arg ? arg : "<NONE>");
1184: if (*activep && options->kex_algorithms == NULL)
1185: options->kex_algorithms = xstrdup(arg);
1186: break;
1187:
1.76 markus 1188: case oHostKeyAlgorithms:
1.238 markus 1189: charptr = &options->hostkeyalgorithms;
1190: parse_keytypes:
1.76 markus 1191: arg = strdelim(&s);
1192: if (!arg || *arg == '\0')
1.238 markus 1193: fatal("%.200s line %d: Missing argument.",
1194: filename, linenum);
1.268 djm 1195: if (*arg != '-' &&
1196: !sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.238 markus 1197: fatal("%s line %d: Bad key types '%s'.",
1198: filename, linenum, arg ? arg : "<NONE>");
1199: if (*activep && *charptr == NULL)
1200: *charptr = xstrdup(arg);
1.76 markus 1201: break;
1202:
1.17 markus 1203: case oLogLevel:
1.164 dtucker 1204: log_level_ptr = &options->log_level;
1.42 provos 1205: arg = strdelim(&s);
1.38 provos 1206: value = log_level_number(arg);
1.95 markus 1207: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1208: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1209: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1210: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1211: *log_level_ptr = (LogLevel) value;
1.17 markus 1212: break;
1213:
1.271 dtucker 1214: case oLogFacility:
1215: log_facility_ptr = &options->log_facility;
1216: arg = strdelim(&s);
1217: value = log_facility_number(arg);
1218: if (value == SYSLOG_FACILITY_NOT_SET)
1219: fatal("%.200s line %d: unsupported log facility '%s'",
1220: filename, linenum, arg ? arg : "<NONE>");
1221: if (*log_facility_ptr == -1)
1222: *log_facility_ptr = (SyslogFacility) value;
1223: break;
1224:
1.88 stevesk 1225: case oLocalForward:
1.17 markus 1226: case oRemoteForward:
1.168 stevesk 1227: case oDynamicForward:
1.42 provos 1228: arg = strdelim(&s);
1.135 djm 1229: if (arg == NULL || *arg == '\0')
1.88 stevesk 1230: fatal("%.200s line %d: Missing port argument.",
1231: filename, linenum);
1.135 djm 1232:
1.168 stevesk 1233: if (opcode == oLocalForward ||
1234: opcode == oRemoteForward) {
1235: arg2 = strdelim(&s);
1236: if (arg2 == NULL || *arg2 == '\0')
1237: fatal("%.200s line %d: Missing target argument.",
1238: filename, linenum);
1.135 djm 1239:
1.168 stevesk 1240: /* construct a string for parse_forward */
1241: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1242: } else if (opcode == oDynamicForward) {
1243: strlcpy(fwdarg, arg, sizeof(fwdarg));
1244: }
1245:
1246: if (parse_forward(&fwd, fwdarg,
1.176 djm 1247: opcode == oDynamicForward ? 1 : 0,
1248: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1249: fatal("%.200s line %d: Bad forwarding specification.",
1250: filename, linenum);
1.135 djm 1251:
1.88 stevesk 1252: if (*activep) {
1.168 stevesk 1253: if (opcode == oLocalForward ||
1254: opcode == oDynamicForward)
1.135 djm 1255: add_local_forward(options, &fwd);
1.88 stevesk 1256: else if (opcode == oRemoteForward)
1.135 djm 1257: add_remote_forward(options, &fwd);
1.88 stevesk 1258: }
1.17 markus 1259: break;
1.71 markus 1260:
1.90 stevesk 1261: case oClearAllForwardings:
1262: intptr = &options->clear_forwardings;
1263: goto parse_flag;
1264:
1.17 markus 1265: case oHost:
1.206 djm 1266: if (cmdline)
1267: fatal("Host directive not supported as a command-line "
1268: "option");
1.17 markus 1269: *activep = 0;
1.191 djm 1270: arg2 = NULL;
1271: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.252 djm 1272: if ((flags & SSHCONF_NEVERMATCH) != 0)
1273: break;
1.191 djm 1274: negated = *arg == '!';
1275: if (negated)
1276: arg++;
1.38 provos 1277: if (match_pattern(host, arg)) {
1.191 djm 1278: if (negated) {
1279: debug("%.200s line %d: Skipping Host "
1280: "block because of negated match "
1281: "for %.100s", filename, linenum,
1282: arg);
1283: *activep = 0;
1284: break;
1285: }
1286: if (!*activep)
1287: arg2 = arg; /* logged below */
1.17 markus 1288: *activep = 1;
1289: }
1.191 djm 1290: }
1291: if (*activep)
1292: debug("%.200s line %d: Applying options for %.100s",
1293: filename, linenum, arg2);
1.42 provos 1294: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1295: return 0;
1296:
1.206 djm 1297: case oMatch:
1298: if (cmdline)
1299: fatal("Host directive not supported as a command-line "
1300: "option");
1.221 djm 1301: value = match_cfg_line(options, &s, pw, host, original_host,
1302: flags & SSHCONF_POSTCANON, filename, linenum);
1.206 djm 1303: if (value < 0)
1304: fatal("%.200s line %d: Bad Match condition", filename,
1305: linenum);
1.252 djm 1306: *activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
1.206 djm 1307: break;
1308:
1.17 markus 1309: case oEscapeChar:
1310: intptr = &options->escape_char;
1.42 provos 1311: arg = strdelim(&s);
1.40 ho 1312: if (!arg || *arg == '\0')
1.17 markus 1313: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.236 djm 1314: if (strcmp(arg, "none") == 0)
1315: value = SSH_ESCAPECHAR_NONE;
1316: else if (arg[1] == '\0')
1317: value = (u_char) arg[0];
1318: else if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1319: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1320: value = (u_char) arg[1] & 31;
1.17 markus 1321: else {
1322: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1323: filename, linenum);
1.17 markus 1324: /* NOTREACHED */
1325: value = 0; /* Avoid compiler warning. */
1326: }
1327: if (*activep && *intptr == -1)
1328: *intptr = value;
1.112 djm 1329: break;
1330:
1331: case oAddressFamily:
1.114 djm 1332: intptr = &options->address_family;
1.207 djm 1333: multistate_ptr = multistate_addressfamily;
1334: goto parse_multistate;
1.17 markus 1335:
1.101 markus 1336: case oEnableSSHKeysign:
1337: intptr = &options->enable_ssh_keysign;
1338: goto parse_flag;
1339:
1.128 markus 1340: case oIdentitiesOnly:
1341: intptr = &options->identities_only;
1342: goto parse_flag;
1343:
1.127 markus 1344: case oServerAliveInterval:
1345: intptr = &options->server_alive_interval;
1346: goto parse_time;
1347:
1348: case oServerAliveCountMax:
1349: intptr = &options->server_alive_count_max;
1350: goto parse_int;
1351:
1.130 djm 1352: case oSendEnv:
1353: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1354: if (strchr(arg, '=') != NULL)
1355: fatal("%s line %d: Invalid environment name.",
1356: filename, linenum);
1.137 djm 1357: if (!*activep)
1358: continue;
1.130 djm 1359: if (options->num_send_env >= MAX_SEND_ENV)
1360: fatal("%s line %d: too many send env.",
1361: filename, linenum);
1362: options->send_env[options->num_send_env++] =
1363: xstrdup(arg);
1364: }
1365: break;
1366:
1.132 djm 1367: case oControlPath:
1368: charptr = &options->control_path;
1369: goto parse_string;
1370:
1371: case oControlMaster:
1372: intptr = &options->control_master;
1.207 djm 1373: multistate_ptr = multistate_controlmaster;
1374: goto parse_multistate;
1.132 djm 1375:
1.187 djm 1376: case oControlPersist:
1377: /* no/false/yes/true, or a time spec */
1378: intptr = &options->control_persist;
1379: arg = strdelim(&s);
1380: if (!arg || *arg == '\0')
1381: fatal("%.200s line %d: Missing ControlPersist"
1382: " argument.", filename, linenum);
1383: value = 0;
1384: value2 = 0; /* timeout */
1385: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1386: value = 0;
1387: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1388: value = 1;
1389: else if ((value2 = convtime(arg)) >= 0)
1390: value = 1;
1391: else
1392: fatal("%.200s line %d: Bad ControlPersist argument.",
1393: filename, linenum);
1394: if (*activep && *intptr == -1) {
1395: *intptr = value;
1396: options->control_persist_timeout = value2;
1397: }
1398: break;
1399:
1.136 djm 1400: case oHashKnownHosts:
1401: intptr = &options->hash_known_hosts;
1402: goto parse_flag;
1403:
1.144 reyk 1404: case oTunnel:
1405: intptr = &options->tun_open;
1.207 djm 1406: multistate_ptr = multistate_tunnel;
1407: goto parse_multistate;
1.144 reyk 1408:
1409: case oTunnelDevice:
1410: arg = strdelim(&s);
1411: if (!arg || *arg == '\0')
1412: fatal("%.200s line %d: Missing argument.", filename, linenum);
1413: value = a2tun(arg, &value2);
1.145 reyk 1414: if (value == SSH_TUNID_ERR)
1.144 reyk 1415: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1416: if (*activep) {
1417: options->tun_local = value;
1418: options->tun_remote = value2;
1419: }
1420: break;
1421:
1422: case oLocalCommand:
1423: charptr = &options->local_command;
1424: goto parse_command;
1425:
1426: case oPermitLocalCommand:
1427: intptr = &options->permit_local_command;
1428: goto parse_flag;
1429:
1.277 ! bluhm 1430: case oRemoteCommand:
! 1431: charptr = &options->remote_command;
! 1432: goto parse_command;
! 1433:
1.167 grunk 1434: case oVisualHostKey:
1435: intptr = &options->visual_host_key;
1436: goto parse_flag;
1437:
1.252 djm 1438: case oInclude:
1439: if (cmdline)
1440: fatal("Include directive not supported as a "
1441: "command-line option");
1442: value = 0;
1443: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1444: /*
1445: * Ensure all paths are anchored. User configuration
1446: * files may begin with '~/' but system configurations
1447: * must not. If the path is relative, then treat it
1448: * as living in ~/.ssh for user configurations or
1449: * /etc/ssh for system ones.
1450: */
1451: if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0)
1452: fatal("%.200s line %d: bad include path %s.",
1453: filename, linenum, arg);
1454: if (*arg != '/' && *arg != '~') {
1455: xasprintf(&arg2, "%s/%s",
1456: (flags & SSHCONF_USERCONF) ?
1457: "~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
1458: } else
1459: arg2 = xstrdup(arg);
1460: memset(&gl, 0, sizeof(gl));
1461: r = glob(arg2, GLOB_TILDE, NULL, &gl);
1462: if (r == GLOB_NOMATCH) {
1463: debug("%.200s line %d: include %s matched no "
1464: "files",filename, linenum, arg2);
1.269 dtucker 1465: free(arg2);
1.252 djm 1466: continue;
1467: } else if (r != 0 || gl.gl_pathc < 0)
1468: fatal("%.200s line %d: glob failed for %s.",
1469: filename, linenum, arg2);
1470: free(arg2);
1471: oactive = *activep;
1472: for (i = 0; i < (u_int)gl.gl_pathc; i++) {
1473: debug3("%.200s line %d: Including file %s "
1474: "depth %d%s", filename, linenum,
1475: gl.gl_pathv[i], depth,
1476: oactive ? "" : " (parse only)");
1477: r = read_config_file_depth(gl.gl_pathv[i],
1478: pw, host, original_host, options,
1479: flags | SSHCONF_CHECKPERM |
1480: (oactive ? 0 : SSHCONF_NEVERMATCH),
1481: activep, depth + 1);
1.264 djm 1482: if (r != 1 && errno != ENOENT) {
1.263 djm 1483: fatal("Can't open user config file "
1484: "%.100s: %.100s", gl.gl_pathv[i],
1485: strerror(errno));
1486: }
1.252 djm 1487: /*
1488: * don't let Match in includes clobber the
1489: * containing file's Match state.
1490: */
1491: *activep = oactive;
1492: if (r != 1)
1493: value = -1;
1494: }
1495: globfree(&gl);
1496: }
1497: if (value != 0)
1498: return value;
1499: break;
1500:
1.190 djm 1501: case oIPQoS:
1502: arg = strdelim(&s);
1503: if ((value = parse_ipqos(arg)) == -1)
1504: fatal("%s line %d: Bad IPQoS value: %s",
1505: filename, linenum, arg);
1506: arg = strdelim(&s);
1507: if (arg == NULL)
1508: value2 = value;
1509: else if ((value2 = parse_ipqos(arg)) == -1)
1510: fatal("%s line %d: Bad IPQoS value: %s",
1511: filename, linenum, arg);
1512: if (*activep) {
1513: options->ip_qos_interactive = value;
1514: options->ip_qos_bulk = value2;
1515: }
1516: break;
1517:
1.192 djm 1518: case oRequestTTY:
1519: intptr = &options->request_tty;
1.207 djm 1520: multistate_ptr = multistate_requesttty;
1521: goto parse_multistate;
1.192 djm 1522:
1.199 djm 1523: case oIgnoreUnknown:
1524: charptr = &options->ignored_unknown;
1525: goto parse_string;
1526:
1.205 djm 1527: case oProxyUseFdpass:
1528: intptr = &options->proxy_use_fdpass;
1529: goto parse_flag;
1530:
1.208 djm 1531: case oCanonicalDomains:
1532: value = options->num_canonical_domains != 0;
1533: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1534: valid_domain(arg, filename, linenum);
1535: if (!*activep || value)
1536: continue;
1537: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1538: fatal("%s line %d: too many hostname suffixes.",
1539: filename, linenum);
1540: options->canonical_domains[
1541: options->num_canonical_domains++] = xstrdup(arg);
1542: }
1543: break;
1544:
1.209 djm 1545: case oCanonicalizePermittedCNAMEs:
1.208 djm 1546: value = options->num_permitted_cnames != 0;
1547: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1548: /* Either '*' for everything or 'list:list' */
1549: if (strcmp(arg, "*") == 0)
1550: arg2 = arg;
1551: else {
1552: lowercase(arg);
1553: if ((arg2 = strchr(arg, ':')) == NULL ||
1554: arg2[1] == '\0') {
1555: fatal("%s line %d: "
1556: "Invalid permitted CNAME \"%s\"",
1557: filename, linenum, arg);
1558: }
1559: *arg2 = '\0';
1560: arg2++;
1561: }
1562: if (!*activep || value)
1563: continue;
1564: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1565: fatal("%s line %d: too many permitted CNAMEs.",
1566: filename, linenum);
1567: cname = options->permitted_cnames +
1568: options->num_permitted_cnames++;
1569: cname->source_list = xstrdup(arg);
1570: cname->target_list = xstrdup(arg2);
1571: }
1572: break;
1573:
1.209 djm 1574: case oCanonicalizeHostname:
1575: intptr = &options->canonicalize_hostname;
1576: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1577: goto parse_multistate;
1578:
1.209 djm 1579: case oCanonicalizeMaxDots:
1580: intptr = &options->canonicalize_max_dots;
1.208 djm 1581: goto parse_int;
1582:
1.209 djm 1583: case oCanonicalizeFallbackLocal:
1584: intptr = &options->canonicalize_fallback_local;
1.208 djm 1585: goto parse_flag;
1586:
1.220 millert 1587: case oStreamLocalBindMask:
1588: arg = strdelim(&s);
1589: if (!arg || *arg == '\0')
1590: fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum);
1591: /* Parse mode in octal format */
1592: value = strtol(arg, &endofnumber, 8);
1593: if (arg == endofnumber || value < 0 || value > 0777)
1594: fatal("%.200s line %d: Bad mask.", filename, linenum);
1595: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1596: break;
1597:
1598: case oStreamLocalBindUnlink:
1599: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1600: goto parse_flag;
1601:
1.223 djm 1602: case oRevokedHostKeys:
1603: charptr = &options->revoked_host_keys;
1604: goto parse_string;
1605:
1.224 djm 1606: case oFingerprintHash:
1.225 djm 1607: intptr = &options->fingerprint_hash;
1.224 djm 1608: arg = strdelim(&s);
1609: if (!arg || *arg == '\0')
1610: fatal("%.200s line %d: Missing argument.",
1611: filename, linenum);
1612: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1613: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1614: filename, linenum, arg);
1.225 djm 1615: if (*activep && *intptr == -1)
1616: *intptr = value;
1.224 djm 1617: break;
1618:
1.229 djm 1619: case oUpdateHostkeys:
1620: intptr = &options->update_hostkeys;
1.232 djm 1621: multistate_ptr = multistate_yesnoask;
1622: goto parse_multistate;
1.229 djm 1623:
1.230 djm 1624: case oHostbasedKeyTypes:
1625: charptr = &options->hostbased_key_types;
1.238 markus 1626: goto parse_keytypes;
1627:
1628: case oPubkeyAcceptedKeyTypes:
1629: charptr = &options->pubkey_key_types;
1630: goto parse_keytypes;
1.230 djm 1631:
1.246 jcs 1632: case oAddKeysToAgent:
1633: intptr = &options->add_keys_to_agent;
1634: multistate_ptr = multistate_yesnoaskconfirm;
1635: goto parse_multistate;
1636:
1.253 markus 1637: case oIdentityAgent:
1638: charptr = &options->identity_agent;
1639: goto parse_string;
1640:
1.96 markus 1641: case oDeprecated:
1.98 markus 1642: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1643: filename, linenum, keyword);
1.98 markus 1644: return 0;
1.96 markus 1645:
1.110 jakob 1646: case oUnsupported:
1647: error("%s line %d: Unsupported option \"%s\"",
1648: filename, linenum, keyword);
1649: return 0;
1650:
1.17 markus 1651: default:
1.221 djm 1652: fatal("%s: Unimplemented opcode %d", __func__, opcode);
1.17 markus 1653: }
1654:
1655: /* Check that there is no garbage at end of line. */
1.57 djm 1656: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1657: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1658: filename, linenum, arg);
1.39 ho 1659: }
1.17 markus 1660: return 0;
1.1 deraadt 1661: }
1662:
1.19 markus 1663: /*
1664: * Reads the config file and modifies the options accordingly. Options
1665: * should already be initialized before this call. This never returns if
1.89 stevesk 1666: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1667: */
1.89 stevesk 1668: int
1.206 djm 1669: read_config_file(const char *filename, struct passwd *pw, const char *host,
1.221 djm 1670: const char *original_host, Options *options, int flags)
1.1 deraadt 1671: {
1.252 djm 1672: int active = 1;
1673:
1674: return read_config_file_depth(filename, pw, host, original_host,
1675: options, flags, &active, 0);
1676: }
1677:
1678: #define READCONF_MAX_DEPTH 16
1679: static int
1680: read_config_file_depth(const char *filename, struct passwd *pw,
1681: const char *host, const char *original_host, Options *options,
1682: int flags, int *activep, int depth)
1683: {
1.17 markus 1684: FILE *f;
1.270 djm 1685: char line[4096];
1.252 djm 1686: int linenum;
1.17 markus 1687: int bad_options = 0;
1688:
1.252 djm 1689: if (depth < 0 || depth > READCONF_MAX_DEPTH)
1690: fatal("Too many recursive configuration includes");
1691:
1.129 djm 1692: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1693: return 0;
1.129 djm 1694:
1.196 dtucker 1695: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1696: struct stat sb;
1.134 deraadt 1697:
1.131 dtucker 1698: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1699: fatal("fstat %s: %s", filename, strerror(errno));
1700: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1701: (sb.st_mode & 022) != 0))
1.129 djm 1702: fatal("Bad owner or permissions on %s", filename);
1703: }
1.17 markus 1704:
1705: debug("Reading configuration data %.200s", filename);
1706:
1.19 markus 1707: /*
1708: * Mark that we are now processing the options. This flag is turned
1709: * on/off by Host specifications.
1710: */
1.17 markus 1711: linenum = 0;
1712: while (fgets(line, sizeof(line), f)) {
1713: /* Update line number counter. */
1714: linenum++;
1.270 djm 1715: if (strlen(line) == sizeof(line) - 1)
1716: fatal("%s line %d too long", filename, linenum);
1.252 djm 1717: if (process_config_line_depth(options, pw, host, original_host,
1718: line, filename, linenum, activep, flags, depth) != 0)
1.17 markus 1719: bad_options++;
1720: }
1721: fclose(f);
1722: if (bad_options > 0)
1.64 millert 1723: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1724: filename, bad_options);
1.89 stevesk 1725: return 1;
1.1 deraadt 1726: }
1727:
1.218 djm 1728: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1729: int
1730: option_clear_or_none(const char *o)
1731: {
1732: return o == NULL || strcasecmp(o, "none") == 0;
1733: }
1734:
1.19 markus 1735: /*
1736: * Initializes options to special values that indicate that they have not yet
1737: * been set. Read_config_file will only set options with this value. Options
1738: * are processed in the following order: command line, user config file,
1739: * system config file. Last, fill_default_options is called.
1740: */
1.1 deraadt 1741:
1.26 markus 1742: void
1.17 markus 1743: initialize_options(Options * options)
1.1 deraadt 1744: {
1.17 markus 1745: memset(options, 'X', sizeof(*options));
1746: options->forward_agent = -1;
1747: options->forward_x11 = -1;
1.123 markus 1748: options->forward_x11_trusted = -1;
1.186 djm 1749: options->forward_x11_timeout = -1;
1.255 dtucker 1750: options->stdio_forward_host = NULL;
1751: options->stdio_forward_port = 0;
1.256 dtucker 1752: options->clear_forwardings = -1;
1.153 markus 1753: options->exit_on_forward_failure = -1;
1.34 markus 1754: options->xauth_location = NULL;
1.220 millert 1755: options->fwd_opts.gateway_ports = -1;
1756: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
1757: options->fwd_opts.streamlocal_bind_unlink = -1;
1.17 markus 1758: options->use_privileged_port = -1;
1.50 markus 1759: options->pubkey_authentication = -1;
1.78 markus 1760: options->challenge_response_authentication = -1;
1.118 markus 1761: options->gss_authentication = -1;
1762: options->gss_deleg_creds = -1;
1.17 markus 1763: options->password_authentication = -1;
1.48 markus 1764: options->kbd_interactive_authentication = -1;
1765: options->kbd_interactive_devices = NULL;
1.72 markus 1766: options->hostbased_authentication = -1;
1.17 markus 1767: options->batch_mode = -1;
1768: options->check_host_ip = -1;
1769: options->strict_host_key_checking = -1;
1770: options->compression = -1;
1.126 markus 1771: options->tcp_keep_alive = -1;
1.17 markus 1772: options->port = -1;
1.114 djm 1773: options->address_family = -1;
1.17 markus 1774: options->connection_attempts = -1;
1.111 djm 1775: options->connection_timeout = -1;
1.17 markus 1776: options->number_of_password_prompts = -1;
1.25 markus 1777: options->ciphers = NULL;
1.62 markus 1778: options->macs = NULL;
1.189 djm 1779: options->kex_algorithms = NULL;
1.76 markus 1780: options->hostkeyalgorithms = NULL;
1.17 markus 1781: options->num_identity_files = 0;
1.241 djm 1782: options->num_certificate_files = 0;
1.17 markus 1783: options->hostname = NULL;
1.52 markus 1784: options->host_key_alias = NULL;
1.17 markus 1785: options->proxy_command = NULL;
1.257 djm 1786: options->jump_user = NULL;
1787: options->jump_host = NULL;
1788: options->jump_port = -1;
1789: options->jump_extra = NULL;
1.17 markus 1790: options->user = NULL;
1791: options->escape_char = -1;
1.193 djm 1792: options->num_system_hostfiles = 0;
1793: options->num_user_hostfiles = 0;
1.185 djm 1794: options->local_forwards = NULL;
1.17 markus 1795: options->num_local_forwards = 0;
1.185 djm 1796: options->remote_forwards = NULL;
1.17 markus 1797: options->num_remote_forwards = 0;
1.271 dtucker 1798: options->log_facility = SYSLOG_FACILITY_NOT_SET;
1.95 markus 1799: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1800: options->preferred_authentications = NULL;
1.77 markus 1801: options->bind_address = NULL;
1.183 markus 1802: options->pkcs11_provider = NULL;
1.101 markus 1803: options->enable_ssh_keysign = - 1;
1.91 markus 1804: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1805: options->identities_only = - 1;
1.105 markus 1806: options->rekey_limit = - 1;
1.198 dtucker 1807: options->rekey_interval = -1;
1.107 jakob 1808: options->verify_host_key_dns = -1;
1.127 markus 1809: options->server_alive_interval = -1;
1810: options->server_alive_count_max = -1;
1.130 djm 1811: options->num_send_env = 0;
1.132 djm 1812: options->control_path = NULL;
1813: options->control_master = -1;
1.187 djm 1814: options->control_persist = -1;
1815: options->control_persist_timeout = 0;
1.136 djm 1816: options->hash_known_hosts = -1;
1.144 reyk 1817: options->tun_open = -1;
1818: options->tun_local = -1;
1819: options->tun_remote = -1;
1820: options->local_command = NULL;
1821: options->permit_local_command = -1;
1.277 ! bluhm 1822: options->remote_command = NULL;
1.246 jcs 1823: options->add_keys_to_agent = -1;
1.253 markus 1824: options->identity_agent = NULL;
1.167 grunk 1825: options->visual_host_key = -1;
1.190 djm 1826: options->ip_qos_interactive = -1;
1827: options->ip_qos_bulk = -1;
1.192 djm 1828: options->request_tty = -1;
1.205 djm 1829: options->proxy_use_fdpass = -1;
1.199 djm 1830: options->ignored_unknown = NULL;
1.208 djm 1831: options->num_canonical_domains = 0;
1832: options->num_permitted_cnames = 0;
1.209 djm 1833: options->canonicalize_max_dots = -1;
1834: options->canonicalize_fallback_local = -1;
1835: options->canonicalize_hostname = -1;
1.223 djm 1836: options->revoked_host_keys = NULL;
1.224 djm 1837: options->fingerprint_hash = -1;
1.229 djm 1838: options->update_hostkeys = -1;
1.230 djm 1839: options->hostbased_key_types = NULL;
1.238 markus 1840: options->pubkey_key_types = NULL;
1.1 deraadt 1841: }
1842:
1.19 markus 1843: /*
1.218 djm 1844: * A petite version of fill_default_options() that just fills the options
1845: * needed for hostname canonicalization to proceed.
1846: */
1847: void
1848: fill_default_options_for_canonicalization(Options *options)
1849: {
1850: if (options->canonicalize_max_dots == -1)
1851: options->canonicalize_max_dots = 1;
1852: if (options->canonicalize_fallback_local == -1)
1853: options->canonicalize_fallback_local = 1;
1854: if (options->canonicalize_hostname == -1)
1855: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1856: }
1857:
1858: /*
1.19 markus 1859: * Called after processing other sources of option data, this fills those
1860: * options for which no value has been specified with their default values.
1861: */
1.26 markus 1862: void
1.17 markus 1863: fill_default_options(Options * options)
1.1 deraadt 1864: {
1.17 markus 1865: if (options->forward_agent == -1)
1.33 markus 1866: options->forward_agent = 0;
1.17 markus 1867: if (options->forward_x11 == -1)
1.23 markus 1868: options->forward_x11 = 0;
1.123 markus 1869: if (options->forward_x11_trusted == -1)
1870: options->forward_x11_trusted = 0;
1.186 djm 1871: if (options->forward_x11_timeout == -1)
1872: options->forward_x11_timeout = 1200;
1.256 dtucker 1873: /*
1874: * stdio forwarding (-W) changes the default for these but we defer
1875: * setting the values so they can be overridden.
1876: */
1.153 markus 1877: if (options->exit_on_forward_failure == -1)
1.256 dtucker 1878: options->exit_on_forward_failure =
1879: options->stdio_forward_host != NULL ? 1 : 0;
1880: if (options->clear_forwardings == -1)
1881: options->clear_forwardings =
1882: options->stdio_forward_host != NULL ? 1 : 0;
1883: if (options->clear_forwardings == 1)
1884: clear_forwardings(options);
1885:
1.34 markus 1886: if (options->xauth_location == NULL)
1.80 markus 1887: options->xauth_location = _PATH_XAUTH;
1.220 millert 1888: if (options->fwd_opts.gateway_ports == -1)
1889: options->fwd_opts.gateway_ports = 0;
1890: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
1891: options->fwd_opts.streamlocal_bind_mask = 0177;
1892: if (options->fwd_opts.streamlocal_bind_unlink == -1)
1893: options->fwd_opts.streamlocal_bind_unlink = 0;
1.17 markus 1894: if (options->use_privileged_port == -1)
1.65 markus 1895: options->use_privileged_port = 0;
1.50 markus 1896: if (options->pubkey_authentication == -1)
1897: options->pubkey_authentication = 1;
1.78 markus 1898: if (options->challenge_response_authentication == -1)
1.83 markus 1899: options->challenge_response_authentication = 1;
1.118 markus 1900: if (options->gss_authentication == -1)
1.122 markus 1901: options->gss_authentication = 0;
1.118 markus 1902: if (options->gss_deleg_creds == -1)
1903: options->gss_deleg_creds = 0;
1.17 markus 1904: if (options->password_authentication == -1)
1905: options->password_authentication = 1;
1.48 markus 1906: if (options->kbd_interactive_authentication == -1)
1.59 markus 1907: options->kbd_interactive_authentication = 1;
1.72 markus 1908: if (options->hostbased_authentication == -1)
1909: options->hostbased_authentication = 0;
1.17 markus 1910: if (options->batch_mode == -1)
1911: options->batch_mode = 0;
1912: if (options->check_host_ip == -1)
1913: options->check_host_ip = 1;
1914: if (options->strict_host_key_checking == -1)
1915: options->strict_host_key_checking = 2; /* 2 is default */
1916: if (options->compression == -1)
1917: options->compression = 0;
1.126 markus 1918: if (options->tcp_keep_alive == -1)
1919: options->tcp_keep_alive = 1;
1.17 markus 1920: if (options->port == -1)
1921: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1922: if (options->address_family == -1)
1923: options->address_family = AF_UNSPEC;
1.17 markus 1924: if (options->connection_attempts == -1)
1.84 markus 1925: options->connection_attempts = 1;
1.17 markus 1926: if (options->number_of_password_prompts == -1)
1927: options->number_of_password_prompts = 3;
1.76 markus 1928: /* options->hostkeyalgorithms, default set in myproposals.h */
1.246 jcs 1929: if (options->add_keys_to_agent == -1)
1930: options->add_keys_to_agent = 0;
1.17 markus 1931: if (options->num_identity_files == 0) {
1.273 djm 1932: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_RSA, 0);
1933: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_DSA, 0);
1934: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_ECDSA, 0);
1935: add_identity_file(options, "~/",
1936: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.27 markus 1937: }
1.17 markus 1938: if (options->escape_char == -1)
1939: options->escape_char = '~';
1.193 djm 1940: if (options->num_system_hostfiles == 0) {
1941: options->system_hostfiles[options->num_system_hostfiles++] =
1942: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1943: options->system_hostfiles[options->num_system_hostfiles++] =
1944: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1945: }
1946: if (options->num_user_hostfiles == 0) {
1947: options->user_hostfiles[options->num_user_hostfiles++] =
1948: xstrdup(_PATH_SSH_USER_HOSTFILE);
1949: options->user_hostfiles[options->num_user_hostfiles++] =
1950: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1951: }
1.95 markus 1952: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1953: options->log_level = SYSLOG_LEVEL_INFO;
1.271 dtucker 1954: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1955: options->log_facility = SYSLOG_FACILITY_USER;
1.91 markus 1956: if (options->no_host_authentication_for_localhost == - 1)
1957: options->no_host_authentication_for_localhost = 0;
1.128 markus 1958: if (options->identities_only == -1)
1959: options->identities_only = 0;
1.101 markus 1960: if (options->enable_ssh_keysign == -1)
1961: options->enable_ssh_keysign = 0;
1.105 markus 1962: if (options->rekey_limit == -1)
1963: options->rekey_limit = 0;
1.198 dtucker 1964: if (options->rekey_interval == -1)
1965: options->rekey_interval = 0;
1.107 jakob 1966: if (options->verify_host_key_dns == -1)
1967: options->verify_host_key_dns = 0;
1.127 markus 1968: if (options->server_alive_interval == -1)
1969: options->server_alive_interval = 0;
1970: if (options->server_alive_count_max == -1)
1971: options->server_alive_count_max = 3;
1.132 djm 1972: if (options->control_master == -1)
1973: options->control_master = 0;
1.187 djm 1974: if (options->control_persist == -1) {
1975: options->control_persist = 0;
1976: options->control_persist_timeout = 0;
1977: }
1.136 djm 1978: if (options->hash_known_hosts == -1)
1979: options->hash_known_hosts = 0;
1.144 reyk 1980: if (options->tun_open == -1)
1.145 reyk 1981: options->tun_open = SSH_TUNMODE_NO;
1982: if (options->tun_local == -1)
1983: options->tun_local = SSH_TUNID_ANY;
1984: if (options->tun_remote == -1)
1985: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1986: if (options->permit_local_command == -1)
1987: options->permit_local_command = 0;
1.167 grunk 1988: if (options->visual_host_key == -1)
1989: options->visual_host_key = 0;
1.190 djm 1990: if (options->ip_qos_interactive == -1)
1991: options->ip_qos_interactive = IPTOS_LOWDELAY;
1992: if (options->ip_qos_bulk == -1)
1993: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1994: if (options->request_tty == -1)
1995: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 1996: if (options->proxy_use_fdpass == -1)
1997: options->proxy_use_fdpass = 0;
1.209 djm 1998: if (options->canonicalize_max_dots == -1)
1999: options->canonicalize_max_dots = 1;
2000: if (options->canonicalize_fallback_local == -1)
2001: options->canonicalize_fallback_local = 1;
2002: if (options->canonicalize_hostname == -1)
2003: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.224 djm 2004: if (options->fingerprint_hash == -1)
2005: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.229 djm 2006: if (options->update_hostkeys == -1)
1.231 djm 2007: options->update_hostkeys = 0;
1.239 djm 2008: if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 ||
2009: kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 ||
2010: kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 ||
2011: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2012: &options->hostbased_key_types) != 0 ||
2013: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2014: &options->pubkey_key_types) != 0)
2015: fatal("%s: kex_assemble_names failed", __func__);
1.224 djm 2016:
1.207 djm 2017: #define CLEAR_ON_NONE(v) \
2018: do { \
1.218 djm 2019: if (option_clear_or_none(v)) { \
1.207 djm 2020: free(v); \
2021: v = NULL; \
2022: } \
2023: } while(0)
2024: CLEAR_ON_NONE(options->local_command);
1.277 ! bluhm 2025: CLEAR_ON_NONE(options->remote_command);
1.207 djm 2026: CLEAR_ON_NONE(options->proxy_command);
2027: CLEAR_ON_NONE(options->control_path);
1.223 djm 2028: CLEAR_ON_NONE(options->revoked_host_keys);
1.254 markus 2029: /* options->identity_agent distinguishes NULL from 'none' */
1.17 markus 2030: /* options->user will be set in the main program if appropriate */
2031: /* options->hostname will be set in the main program if appropriate */
1.52 markus 2032: /* options->host_key_alias should not be set by default */
1.67 markus 2033: /* options->preferred_authentications will be set in ssh */
1.135 djm 2034: }
2035:
1.220 millert 2036: struct fwdarg {
2037: char *arg;
2038: int ispath;
2039: };
2040:
2041: /*
2042: * parse_fwd_field
2043: * parses the next field in a port forwarding specification.
2044: * sets fwd to the parsed field and advances p past the colon
2045: * or sets it to NULL at end of string.
2046: * returns 0 on success, else non-zero.
2047: */
2048: static int
2049: parse_fwd_field(char **p, struct fwdarg *fwd)
2050: {
2051: char *ep, *cp = *p;
2052: int ispath = 0;
2053:
2054: if (*cp == '\0') {
2055: *p = NULL;
2056: return -1; /* end of string */
2057: }
2058:
2059: /*
2060: * A field escaped with square brackets is used literally.
2061: * XXX - allow ']' to be escaped via backslash?
2062: */
2063: if (*cp == '[') {
2064: /* find matching ']' */
2065: for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
2066: if (*ep == '/')
2067: ispath = 1;
2068: }
2069: /* no matching ']' or not at end of field. */
2070: if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
2071: return -1;
2072: /* NUL terminate the field and advance p past the colon */
2073: *ep++ = '\0';
2074: if (*ep != '\0')
2075: *ep++ = '\0';
2076: fwd->arg = cp + 1;
2077: fwd->ispath = ispath;
2078: *p = ep;
2079: return 0;
2080: }
2081:
2082: for (cp = *p; *cp != '\0'; cp++) {
2083: switch (*cp) {
2084: case '\\':
2085: memmove(cp, cp + 1, strlen(cp + 1) + 1);
1.237 djm 2086: if (*cp == '\0')
2087: return -1;
1.220 millert 2088: break;
2089: case '/':
2090: ispath = 1;
2091: break;
2092: case ':':
2093: *cp++ = '\0';
2094: goto done;
2095: }
2096: }
2097: done:
2098: fwd->arg = *p;
2099: fwd->ispath = ispath;
2100: *p = cp;
2101: return 0;
2102: }
2103:
1.135 djm 2104: /*
2105: * parse_forward
2106: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 2107: * dynamicfwd == 0
1.220 millert 2108: * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
2109: * listenpath:connectpath
1.168 stevesk 2110: * dynamicfwd == 1
2111: * [listenhost:]listenport
1.135 djm 2112: * returns number of arguments parsed or zero on error
2113: */
2114: int
1.220 millert 2115: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 2116: {
1.220 millert 2117: struct fwdarg fwdargs[4];
2118: char *p, *cp;
1.135 djm 2119: int i;
2120:
1.220 millert 2121: memset(fwd, 0, sizeof(*fwd));
2122: memset(fwdargs, 0, sizeof(fwdargs));
1.135 djm 2123:
2124: cp = p = xstrdup(fwdspec);
2125:
2126: /* skip leading spaces */
1.214 deraadt 2127: while (isspace((u_char)*cp))
1.135 djm 2128: cp++;
2129:
1.220 millert 2130: for (i = 0; i < 4; ++i) {
2131: if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.135 djm 2132: break;
1.220 millert 2133: }
1.135 djm 2134:
1.170 stevesk 2135: /* Check for trailing garbage */
1.220 millert 2136: if (cp != NULL && *cp != '\0') {
1.135 djm 2137: i = 0; /* failure */
1.220 millert 2138: }
1.135 djm 2139:
2140: switch (i) {
1.168 stevesk 2141: case 1:
1.220 millert 2142: if (fwdargs[0].ispath) {
2143: fwd->listen_path = xstrdup(fwdargs[0].arg);
2144: fwd->listen_port = PORT_STREAMLOCAL;
2145: } else {
2146: fwd->listen_host = NULL;
2147: fwd->listen_port = a2port(fwdargs[0].arg);
2148: }
1.168 stevesk 2149: fwd->connect_host = xstrdup("socks");
2150: break;
2151:
2152: case 2:
1.220 millert 2153: if (fwdargs[0].ispath && fwdargs[1].ispath) {
2154: fwd->listen_path = xstrdup(fwdargs[0].arg);
2155: fwd->listen_port = PORT_STREAMLOCAL;
2156: fwd->connect_path = xstrdup(fwdargs[1].arg);
2157: fwd->connect_port = PORT_STREAMLOCAL;
2158: } else if (fwdargs[1].ispath) {
2159: fwd->listen_host = NULL;
2160: fwd->listen_port = a2port(fwdargs[0].arg);
2161: fwd->connect_path = xstrdup(fwdargs[1].arg);
2162: fwd->connect_port = PORT_STREAMLOCAL;
2163: } else {
2164: fwd->listen_host = xstrdup(fwdargs[0].arg);
2165: fwd->listen_port = a2port(fwdargs[1].arg);
2166: fwd->connect_host = xstrdup("socks");
2167: }
1.168 stevesk 2168: break;
2169:
1.135 djm 2170: case 3:
1.220 millert 2171: if (fwdargs[0].ispath) {
2172: fwd->listen_path = xstrdup(fwdargs[0].arg);
2173: fwd->listen_port = PORT_STREAMLOCAL;
2174: fwd->connect_host = xstrdup(fwdargs[1].arg);
2175: fwd->connect_port = a2port(fwdargs[2].arg);
2176: } else if (fwdargs[2].ispath) {
2177: fwd->listen_host = xstrdup(fwdargs[0].arg);
2178: fwd->listen_port = a2port(fwdargs[1].arg);
2179: fwd->connect_path = xstrdup(fwdargs[2].arg);
2180: fwd->connect_port = PORT_STREAMLOCAL;
2181: } else {
2182: fwd->listen_host = NULL;
2183: fwd->listen_port = a2port(fwdargs[0].arg);
2184: fwd->connect_host = xstrdup(fwdargs[1].arg);
2185: fwd->connect_port = a2port(fwdargs[2].arg);
2186: }
1.135 djm 2187: break;
2188:
2189: case 4:
1.220 millert 2190: fwd->listen_host = xstrdup(fwdargs[0].arg);
2191: fwd->listen_port = a2port(fwdargs[1].arg);
2192: fwd->connect_host = xstrdup(fwdargs[2].arg);
2193: fwd->connect_port = a2port(fwdargs[3].arg);
1.135 djm 2194: break;
2195: default:
2196: i = 0; /* failure */
2197: }
2198:
1.202 djm 2199: free(p);
1.135 djm 2200:
1.168 stevesk 2201: if (dynamicfwd) {
2202: if (!(i == 1 || i == 2))
2203: goto fail_free;
2204: } else {
1.220 millert 2205: if (!(i == 3 || i == 4)) {
2206: if (fwd->connect_path == NULL &&
2207: fwd->listen_path == NULL)
2208: goto fail_free;
2209: }
2210: if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.168 stevesk 2211: goto fail_free;
2212: }
2213:
1.220 millert 2214: if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
2215: (!remotefwd && fwd->listen_port == 0))
1.135 djm 2216: goto fail_free;
2217: if (fwd->connect_host != NULL &&
2218: strlen(fwd->connect_host) >= NI_MAXHOST)
2219: goto fail_free;
1.220 millert 2220: /* XXX - if connecting to a remote socket, max sun len may not match this host */
2221: if (fwd->connect_path != NULL &&
2222: strlen(fwd->connect_path) >= PATH_MAX_SUN)
2223: goto fail_free;
1.176 djm 2224: if (fwd->listen_host != NULL &&
2225: strlen(fwd->listen_host) >= NI_MAXHOST)
2226: goto fail_free;
1.220 millert 2227: if (fwd->listen_path != NULL &&
2228: strlen(fwd->listen_path) >= PATH_MAX_SUN)
2229: goto fail_free;
1.135 djm 2230:
2231: return (i);
2232:
2233: fail_free:
1.202 djm 2234: free(fwd->connect_host);
2235: fwd->connect_host = NULL;
1.220 millert 2236: free(fwd->connect_path);
2237: fwd->connect_path = NULL;
1.202 djm 2238: free(fwd->listen_host);
2239: fwd->listen_host = NULL;
1.220 millert 2240: free(fwd->listen_path);
2241: fwd->listen_path = NULL;
1.135 djm 2242: return (0);
1.221 djm 2243: }
2244:
1.257 djm 2245: int
2246: parse_jump(const char *s, Options *o, int active)
2247: {
2248: char *orig, *sdup, *cp;
2249: char *host = NULL, *user = NULL;
1.258 naddy 2250: int ret = -1, port = -1, first;
1.257 djm 2251:
2252: active &= o->proxy_command == NULL && o->jump_host == NULL;
2253:
2254: orig = sdup = xstrdup(s);
1.258 naddy 2255: first = active;
1.259 djm 2256: do {
2257: if ((cp = strrchr(sdup, ',')) == NULL)
2258: cp = sdup; /* last */
2259: else
2260: *cp++ = '\0';
2261:
1.258 naddy 2262: if (first) {
1.257 djm 2263: /* First argument and configuration is active */
2264: if (parse_user_host_port(cp, &user, &host, &port) != 0)
2265: goto out;
2266: } else {
2267: /* Subsequent argument or inactive configuration */
2268: if (parse_user_host_port(cp, NULL, NULL, NULL) != 0)
2269: goto out;
2270: }
1.258 naddy 2271: first = 0; /* only check syntax for subsequent hosts */
1.259 djm 2272: } while (cp != sdup);
1.257 djm 2273: /* success */
1.258 naddy 2274: if (active) {
2275: o->jump_user = user;
2276: o->jump_host = host;
2277: o->jump_port = port;
2278: o->proxy_command = xstrdup("none");
2279: user = host = NULL;
1.259 djm 2280: if ((cp = strrchr(s, ',')) != NULL && cp != s) {
2281: o->jump_extra = xstrdup(s);
2282: o->jump_extra[cp - s] = '\0';
2283: }
1.258 naddy 2284: }
1.257 djm 2285: ret = 0;
2286: out:
1.258 naddy 2287: free(orig);
1.257 djm 2288: free(user);
2289: free(host);
2290: return ret;
2291: }
2292:
1.221 djm 2293: /* XXX the following is a near-vebatim copy from servconf.c; refactor */
2294: static const char *
2295: fmt_multistate_int(int val, const struct multistate *m)
2296: {
2297: u_int i;
2298:
2299: for (i = 0; m[i].key != NULL; i++) {
2300: if (m[i].value == val)
2301: return m[i].key;
2302: }
2303: return "UNKNOWN";
2304: }
2305:
2306: static const char *
2307: fmt_intarg(OpCodes code, int val)
2308: {
2309: if (val == -1)
2310: return "unset";
2311: switch (code) {
2312: case oAddressFamily:
2313: return fmt_multistate_int(val, multistate_addressfamily);
2314: case oVerifyHostKeyDNS:
2315: case oStrictHostKeyChecking:
1.232 djm 2316: case oUpdateHostkeys:
1.221 djm 2317: return fmt_multistate_int(val, multistate_yesnoask);
2318: case oControlMaster:
2319: return fmt_multistate_int(val, multistate_controlmaster);
2320: case oTunnel:
2321: return fmt_multistate_int(val, multistate_tunnel);
2322: case oRequestTTY:
2323: return fmt_multistate_int(val, multistate_requesttty);
2324: case oCanonicalizeHostname:
2325: return fmt_multistate_int(val, multistate_canonicalizehostname);
1.224 djm 2326: case oFingerprintHash:
2327: return ssh_digest_alg_name(val);
1.221 djm 2328: default:
2329: switch (val) {
2330: case 0:
2331: return "no";
2332: case 1:
2333: return "yes";
2334: default:
2335: return "UNKNOWN";
2336: }
2337: }
2338: }
2339:
2340: static const char *
2341: lookup_opcode_name(OpCodes code)
2342: {
2343: u_int i;
2344:
2345: for (i = 0; keywords[i].name != NULL; i++)
2346: if (keywords[i].opcode == code)
2347: return(keywords[i].name);
2348: return "UNKNOWN";
2349: }
2350:
2351: static void
2352: dump_cfg_int(OpCodes code, int val)
2353: {
2354: printf("%s %d\n", lookup_opcode_name(code), val);
2355: }
2356:
2357: static void
2358: dump_cfg_fmtint(OpCodes code, int val)
2359: {
2360: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2361: }
2362:
2363: static void
2364: dump_cfg_string(OpCodes code, const char *val)
2365: {
2366: if (val == NULL)
2367: return;
2368: printf("%s %s\n", lookup_opcode_name(code), val);
2369: }
2370:
2371: static void
2372: dump_cfg_strarray(OpCodes code, u_int count, char **vals)
2373: {
2374: u_int i;
2375:
2376: for (i = 0; i < count; i++)
2377: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2378: }
2379:
2380: static void
2381: dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
2382: {
2383: u_int i;
2384:
2385: printf("%s", lookup_opcode_name(code));
2386: for (i = 0; i < count; i++)
2387: printf(" %s", vals[i]);
2388: printf("\n");
2389: }
2390:
2391: static void
2392: dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
2393: {
2394: const struct Forward *fwd;
2395: u_int i;
2396:
2397: /* oDynamicForward */
2398: for (i = 0; i < count; i++) {
2399: fwd = &fwds[i];
1.265 djm 2400: if (code == oDynamicForward && fwd->connect_host != NULL &&
1.221 djm 2401: strcmp(fwd->connect_host, "socks") != 0)
2402: continue;
1.265 djm 2403: if (code == oLocalForward && fwd->connect_host != NULL &&
1.221 djm 2404: strcmp(fwd->connect_host, "socks") == 0)
2405: continue;
2406: printf("%s", lookup_opcode_name(code));
2407: if (fwd->listen_port == PORT_STREAMLOCAL)
2408: printf(" %s", fwd->listen_path);
2409: else if (fwd->listen_host == NULL)
2410: printf(" %d", fwd->listen_port);
2411: else {
2412: printf(" [%s]:%d",
2413: fwd->listen_host, fwd->listen_port);
2414: }
2415: if (code != oDynamicForward) {
2416: if (fwd->connect_port == PORT_STREAMLOCAL)
2417: printf(" %s", fwd->connect_path);
2418: else if (fwd->connect_host == NULL)
2419: printf(" %d", fwd->connect_port);
2420: else {
2421: printf(" [%s]:%d",
2422: fwd->connect_host, fwd->connect_port);
2423: }
2424: }
2425: printf("\n");
2426: }
2427: }
2428:
2429: void
2430: dump_client_config(Options *o, const char *host)
2431: {
2432: int i;
1.257 djm 2433: char buf[8];
1.221 djm 2434:
1.240 djm 2435: /* This is normally prepared in ssh_kex2 */
2436: if (kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->hostkeyalgorithms) != 0)
2437: fatal("%s: kex_assemble_names failed", __func__);
2438:
1.221 djm 2439: /* Most interesting options first: user, host, port */
2440: dump_cfg_string(oUser, o->user);
2441: dump_cfg_string(oHostName, host);
2442: dump_cfg_int(oPort, o->port);
2443:
2444: /* Flag options */
2445: dump_cfg_fmtint(oAddressFamily, o->address_family);
2446: dump_cfg_fmtint(oBatchMode, o->batch_mode);
2447: dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
2448: dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
2449: dump_cfg_fmtint(oChallengeResponseAuthentication, o->challenge_response_authentication);
2450: dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
2451: dump_cfg_fmtint(oCompression, o->compression);
2452: dump_cfg_fmtint(oControlMaster, o->control_master);
2453: dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
1.256 dtucker 2454: dump_cfg_fmtint(oClearAllForwardings, o->clear_forwardings);
1.221 djm 2455: dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
1.224 djm 2456: dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
1.221 djm 2457: dump_cfg_fmtint(oForwardAgent, o->forward_agent);
2458: dump_cfg_fmtint(oForwardX11, o->forward_x11);
2459: dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
2460: dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
2461: #ifdef GSSAPI
2462: dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
2463: dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
2464: #endif /* GSSAPI */
2465: dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
2466: dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
2467: dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
2468: dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
2469: dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
2470: dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
2471: dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
2472: dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
2473: dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
2474: dump_cfg_fmtint(oRequestTTY, o->request_tty);
2475: dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
2476: dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
2477: dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
2478: dump_cfg_fmtint(oTunnel, o->tun_open);
2479: dump_cfg_fmtint(oUsePrivilegedPort, o->use_privileged_port);
2480: dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
2481: dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
1.229 djm 2482: dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
1.221 djm 2483:
2484: /* Integer options */
2485: dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
2486: dump_cfg_int(oConnectionAttempts, o->connection_attempts);
2487: dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
2488: dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
2489: dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
2490: dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
2491:
2492: /* String options */
2493: dump_cfg_string(oBindAddress, o->bind_address);
2494: dump_cfg_string(oCiphers, o->ciphers ? o->ciphers : KEX_CLIENT_ENCRYPT);
2495: dump_cfg_string(oControlPath, o->control_path);
1.240 djm 2496: dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
1.221 djm 2497: dump_cfg_string(oHostKeyAlias, o->host_key_alias);
1.230 djm 2498: dump_cfg_string(oHostbasedKeyTypes, o->hostbased_key_types);
1.253 markus 2499: dump_cfg_string(oIdentityAgent, o->identity_agent);
1.221 djm 2500: dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
2501: dump_cfg_string(oKexAlgorithms, o->kex_algorithms ? o->kex_algorithms : KEX_CLIENT_KEX);
2502: dump_cfg_string(oLocalCommand, o->local_command);
1.277 ! bluhm 2503: dump_cfg_string(oRemoteCommand, o->remote_command);
1.221 djm 2504: dump_cfg_string(oLogLevel, log_level_name(o->log_level));
2505: dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC);
1.266 djm 2506: #ifdef ENABLE_PKCS11
1.221 djm 2507: dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
1.266 djm 2508: #endif
1.221 djm 2509: dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
1.242 djm 2510: dump_cfg_string(oPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.230 djm 2511: dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
1.221 djm 2512: dump_cfg_string(oXAuthLocation, o->xauth_location);
2513:
1.230 djm 2514: /* Forwards */
1.221 djm 2515: dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
2516: dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
2517: dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
2518:
2519: /* String array options */
2520: dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
2521: dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
2522: dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
2523: dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
2524: dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
2525:
2526: /* Special cases */
2527:
2528: /* oConnectTimeout */
2529: if (o->connection_timeout == -1)
2530: printf("connecttimeout none\n");
2531: else
2532: dump_cfg_int(oConnectTimeout, o->connection_timeout);
2533:
2534: /* oTunnelDevice */
2535: printf("tunneldevice");
2536: if (o->tun_local == SSH_TUNID_ANY)
2537: printf(" any");
2538: else
2539: printf(" %d", o->tun_local);
2540: if (o->tun_remote == SSH_TUNID_ANY)
2541: printf(":any");
2542: else
2543: printf(":%d", o->tun_remote);
2544: printf("\n");
2545:
2546: /* oCanonicalizePermittedCNAMEs */
2547: if ( o->num_permitted_cnames > 0) {
2548: printf("canonicalizePermittedcnames");
2549: for (i = 0; i < o->num_permitted_cnames; i++) {
2550: printf(" %s:%s", o->permitted_cnames[i].source_list,
2551: o->permitted_cnames[i].target_list);
2552: }
2553: printf("\n");
2554: }
2555:
2556: /* oControlPersist */
2557: if (o->control_persist == 0 || o->control_persist_timeout == 0)
2558: dump_cfg_fmtint(oControlPersist, o->control_persist);
2559: else
2560: dump_cfg_int(oControlPersist, o->control_persist_timeout);
2561:
2562: /* oEscapeChar */
2563: if (o->escape_char == SSH_ESCAPECHAR_NONE)
2564: printf("escapechar none\n");
2565: else {
1.257 djm 2566: vis(buf, o->escape_char, VIS_WHITE, 0);
2567: printf("escapechar %s\n", buf);
1.221 djm 2568: }
2569:
2570: /* oIPQoS */
2571: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2572: printf("%s\n", iptos2str(o->ip_qos_bulk));
2573:
2574: /* oRekeyLimit */
1.249 dtucker 2575: printf("rekeylimit %llu %d\n",
2576: (unsigned long long)o->rekey_limit, o->rekey_interval);
1.221 djm 2577:
2578: /* oStreamLocalBindMask */
2579: printf("streamlocalbindmask 0%o\n",
2580: o->fwd_opts.streamlocal_bind_mask);
1.257 djm 2581:
2582: /* oProxyCommand / oProxyJump */
2583: if (o->jump_host == NULL)
2584: dump_cfg_string(oProxyCommand, o->proxy_command);
2585: else {
2586: /* Check for numeric addresses */
2587: i = strchr(o->jump_host, ':') != NULL ||
2588: strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
2589: snprintf(buf, sizeof(buf), "%d", o->jump_port);
2590: printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
1.259 djm 2591: /* optional additional jump spec */
2592: o->jump_extra == NULL ? "" : o->jump_extra,
2593: o->jump_extra == NULL ? "" : ",",
1.257 djm 2594: /* optional user */
2595: o->jump_user == NULL ? "" : o->jump_user,
2596: o->jump_user == NULL ? "" : "@",
2597: /* opening [ if hostname is numeric */
2598: i ? "[" : "",
2599: /* mandatory hostname */
2600: o->jump_host,
2601: /* closing ] if hostname is numeric */
2602: i ? "]" : "",
2603: /* optional port number */
2604: o->jump_port <= 0 ? "" : ":",
1.259 djm 2605: o->jump_port <= 0 ? "" : buf);
1.257 djm 2606: }
1.1 deraadt 2607: }
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