Annotation of src/usr.bin/ssh/readconf.c, Revision 1.280
1.280 ! millert 1: /* $OpenBSD: readconf.c,v 1.279 2017/09/21 19:16:53 markus 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:
1.19 markus 671: /*
1.70 stevesk 672: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 673: */
1.26 markus 674: static OpCodes
1.199 djm 675: parse_token(const char *cp, const char *filename, int linenum,
676: const char *ignored_unknown)
1.1 deraadt 677: {
1.199 djm 678: int i;
1.1 deraadt 679:
1.17 markus 680: for (i = 0; keywords[i].name; i++)
1.199 djm 681: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 682: return keywords[i].opcode;
1.235 djm 683: if (ignored_unknown != NULL &&
684: match_pattern_list(cp, ignored_unknown, 1) == 1)
1.199 djm 685: return oIgnoredUnknownOption;
1.75 stevesk 686: error("%s: line %d: Bad configuration option: %s",
687: filename, linenum, cp);
1.17 markus 688: return oBadOption;
1.1 deraadt 689: }
690:
1.207 djm 691: /* Multistate option parsing */
692: struct multistate {
693: char *key;
694: int value;
695: };
696: static const struct multistate multistate_flag[] = {
697: { "true", 1 },
698: { "false", 0 },
699: { "yes", 1 },
700: { "no", 0 },
701: { NULL, -1 }
702: };
703: static const struct multistate multistate_yesnoask[] = {
704: { "true", 1 },
705: { "false", 0 },
706: { "yes", 1 },
707: { "no", 0 },
708: { "ask", 2 },
709: { NULL, -1 }
710: };
1.278 djm 711: static const struct multistate multistate_strict_hostkey[] = {
712: { "true", SSH_STRICT_HOSTKEY_YES },
713: { "false", SSH_STRICT_HOSTKEY_OFF },
714: { "yes", SSH_STRICT_HOSTKEY_YES },
715: { "no", SSH_STRICT_HOSTKEY_OFF },
716: { "ask", SSH_STRICT_HOSTKEY_ASK },
717: { "off", SSH_STRICT_HOSTKEY_OFF },
718: { "accept-new", SSH_STRICT_HOSTKEY_NEW },
719: { NULL, -1 }
720: };
1.246 jcs 721: static const struct multistate multistate_yesnoaskconfirm[] = {
722: { "true", 1 },
723: { "false", 0 },
724: { "yes", 1 },
725: { "no", 0 },
726: { "ask", 2 },
727: { "confirm", 3 },
728: { NULL, -1 }
729: };
1.207 djm 730: static const struct multistate multistate_addressfamily[] = {
731: { "inet", AF_INET },
732: { "inet6", AF_INET6 },
733: { "any", AF_UNSPEC },
734: { NULL, -1 }
735: };
736: static const struct multistate multistate_controlmaster[] = {
737: { "true", SSHCTL_MASTER_YES },
738: { "yes", SSHCTL_MASTER_YES },
739: { "false", SSHCTL_MASTER_NO },
740: { "no", SSHCTL_MASTER_NO },
741: { "auto", SSHCTL_MASTER_AUTO },
742: { "ask", SSHCTL_MASTER_ASK },
743: { "autoask", SSHCTL_MASTER_AUTO_ASK },
744: { NULL, -1 }
745: };
746: static const struct multistate multistate_tunnel[] = {
747: { "ethernet", SSH_TUNMODE_ETHERNET },
748: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
749: { "true", SSH_TUNMODE_DEFAULT },
750: { "yes", SSH_TUNMODE_DEFAULT },
751: { "false", SSH_TUNMODE_NO },
752: { "no", SSH_TUNMODE_NO },
753: { NULL, -1 }
754: };
755: static const struct multistate multistate_requesttty[] = {
756: { "true", REQUEST_TTY_YES },
757: { "yes", REQUEST_TTY_YES },
758: { "false", REQUEST_TTY_NO },
759: { "no", REQUEST_TTY_NO },
760: { "force", REQUEST_TTY_FORCE },
761: { "auto", REQUEST_TTY_AUTO },
762: { NULL, -1 }
763: };
1.209 djm 764: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 765: { "true", SSH_CANONICALISE_YES },
766: { "false", SSH_CANONICALISE_NO },
767: { "yes", SSH_CANONICALISE_YES },
768: { "no", SSH_CANONICALISE_NO },
769: { "always", SSH_CANONICALISE_ALWAYS },
770: { NULL, -1 }
771: };
1.207 djm 772:
1.19 markus 773: /*
774: * Processes a single option line as used in the configuration files. This
775: * only sets those values that have not already been set.
776: */
1.14 markus 777: int
1.206 djm 778: process_config_line(Options *options, struct passwd *pw, const char *host,
1.221 djm 779: const char *original_host, char *line, const char *filename,
780: int linenum, int *activep, int flags)
1.1 deraadt 781: {
1.252 djm 782: return process_config_line_depth(options, pw, host, original_host,
783: line, filename, linenum, activep, flags, 0);
784: }
785:
786: #define WHITESPACE " \t\r\n"
787: static int
788: process_config_line_depth(Options *options, struct passwd *pw, const char *host,
789: const char *original_host, char *line, const char *filename,
790: int linenum, int *activep, int flags, int depth)
791: {
1.193 djm 792: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
793: char **cpptr, fwdarg[256];
1.199 djm 794: u_int i, *uintptr, max_entries = 0;
1.252 djm 795: int r, oactive, negated, opcode, *intptr, value, value2, cmdline = 0;
1.279 markus 796: int remotefwd, dynamicfwd;
1.164 dtucker 797: LogLevel *log_level_ptr;
1.271 dtucker 798: SyslogFacility *log_facility_ptr;
1.201 dtucker 799: long long val64;
1.102 markus 800: size_t len;
1.220 millert 801: struct Forward fwd;
1.207 djm 802: const struct multistate *multistate_ptr;
1.208 djm 803: struct allowed_cname *cname;
1.252 djm 804: glob_t gl;
1.106 djm 805:
1.206 djm 806: if (activep == NULL) { /* We are processing a command line directive */
807: cmdline = 1;
808: activep = &cmdline;
809: }
810:
1.267 djm 811: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1.233 djm 812: if ((len = strlen(line)) == 0)
813: return 0;
814: for (len--; len > 0; len--) {
1.267 djm 815: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1.106 djm 816: break;
817: line[len] = '\0';
818: }
1.1 deraadt 819:
1.42 provos 820: s = line;
821: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 822: if ((keyword = strdelim(&s)) == NULL)
823: return 0;
1.42 provos 824: /* Ignore leading whitespace. */
825: if (*keyword == '\0')
1.43 markus 826: keyword = strdelim(&s);
1.56 deraadt 827: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 828: return 0;
1.199 djm 829: /* Match lowercase keyword */
1.207 djm 830: lowercase(keyword);
1.17 markus 831:
1.199 djm 832: opcode = parse_token(keyword, filename, linenum,
833: options->ignored_unknown);
1.17 markus 834:
835: switch (opcode) {
836: case oBadOption:
1.19 markus 837: /* don't panic, but count bad options */
838: return -1;
1.273 djm 839: case oIgnore:
840: return 0;
1.199 djm 841: case oIgnoredUnknownOption:
842: debug("%s line %d: Ignored unknown option \"%s\"",
843: filename, linenum, keyword);
844: return 0;
1.111 djm 845: case oConnectTimeout:
846: intptr = &options->connection_timeout;
1.127 markus 847: parse_time:
1.111 djm 848: arg = strdelim(&s);
849: if (!arg || *arg == '\0')
850: fatal("%s line %d: missing time value.",
851: filename, linenum);
1.221 djm 852: if (strcmp(arg, "none") == 0)
853: value = -1;
854: else if ((value = convtime(arg)) == -1)
1.111 djm 855: fatal("%s line %d: invalid time value.",
856: filename, linenum);
1.160 dtucker 857: if (*activep && *intptr == -1)
1.111 djm 858: *intptr = value;
859: break;
860:
1.17 markus 861: case oForwardAgent:
862: intptr = &options->forward_agent;
1.207 djm 863: parse_flag:
864: multistate_ptr = multistate_flag;
865: parse_multistate:
1.42 provos 866: arg = strdelim(&s);
1.40 ho 867: if (!arg || *arg == '\0')
1.207 djm 868: fatal("%s line %d: missing argument.",
869: filename, linenum);
870: value = -1;
871: for (i = 0; multistate_ptr[i].key != NULL; i++) {
872: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
873: value = multistate_ptr[i].value;
874: break;
875: }
876: }
877: if (value == -1)
878: fatal("%s line %d: unsupported option \"%s\".",
879: filename, linenum, arg);
1.17 markus 880: if (*activep && *intptr == -1)
881: *intptr = value;
882: break;
883:
884: case oForwardX11:
885: intptr = &options->forward_x11;
886: goto parse_flag;
887:
1.123 markus 888: case oForwardX11Trusted:
889: intptr = &options->forward_x11_trusted;
890: goto parse_flag;
1.221 djm 891:
1.186 djm 892: case oForwardX11Timeout:
893: intptr = &options->forward_x11_timeout;
894: goto parse_time;
1.123 markus 895:
1.17 markus 896: case oGatewayPorts:
1.220 millert 897: intptr = &options->fwd_opts.gateway_ports;
1.17 markus 898: goto parse_flag;
899:
1.153 markus 900: case oExitOnForwardFailure:
901: intptr = &options->exit_on_forward_failure;
902: goto parse_flag;
903:
1.17 markus 904: case oUsePrivilegedPort:
905: intptr = &options->use_privileged_port;
906: goto parse_flag;
907:
908: case oPasswordAuthentication:
909: intptr = &options->password_authentication;
910: goto parse_flag;
911:
1.48 markus 912: case oKbdInteractiveAuthentication:
913: intptr = &options->kbd_interactive_authentication;
914: goto parse_flag;
915:
916: case oKbdInteractiveDevices:
917: charptr = &options->kbd_interactive_devices;
918: goto parse_string;
919:
1.50 markus 920: case oPubkeyAuthentication:
921: intptr = &options->pubkey_authentication;
1.30 markus 922: goto parse_flag;
923:
1.72 markus 924: case oHostbasedAuthentication:
925: intptr = &options->hostbased_authentication;
926: goto parse_flag;
927:
1.59 markus 928: case oChallengeResponseAuthentication:
1.78 markus 929: intptr = &options->challenge_response_authentication;
1.17 markus 930: goto parse_flag;
1.108 jakob 931:
1.118 markus 932: case oGssAuthentication:
933: intptr = &options->gss_authentication;
934: goto parse_flag;
935:
936: case oGssDelegateCreds:
937: intptr = &options->gss_deleg_creds;
938: goto parse_flag;
939:
1.17 markus 940: case oBatchMode:
941: intptr = &options->batch_mode;
942: goto parse_flag;
943:
944: case oCheckHostIP:
945: intptr = &options->check_host_ip;
1.167 grunk 946: goto parse_flag;
1.17 markus 947:
1.107 jakob 948: case oVerifyHostKeyDNS:
949: intptr = &options->verify_host_key_dns;
1.207 djm 950: multistate_ptr = multistate_yesnoask;
951: goto parse_multistate;
1.107 jakob 952:
1.17 markus 953: case oStrictHostKeyChecking:
954: intptr = &options->strict_host_key_checking;
1.278 djm 955: multistate_ptr = multistate_strict_hostkey;
1.207 djm 956: goto parse_multistate;
1.17 markus 957:
958: case oCompression:
959: intptr = &options->compression;
960: goto parse_flag;
961:
1.126 markus 962: case oTCPKeepAlive:
963: intptr = &options->tcp_keep_alive;
1.17 markus 964: goto parse_flag;
965:
1.91 markus 966: case oNoHostAuthenticationForLocalhost:
967: intptr = &options->no_host_authentication_for_localhost;
968: goto parse_flag;
969:
1.17 markus 970: case oNumberOfPasswordPrompts:
971: intptr = &options->number_of_password_prompts;
972: goto parse_int;
973:
1.105 markus 974: case oRekeyLimit:
975: arg = strdelim(&s);
976: if (!arg || *arg == '\0')
1.198 dtucker 977: fatal("%.200s line %d: Missing argument.", filename,
978: linenum);
979: if (strcmp(arg, "default") == 0) {
980: val64 = 0;
981: } else {
1.200 dtucker 982: if (scan_scaled(arg, &val64) == -1)
983: fatal("%.200s line %d: Bad number '%s': %s",
984: filename, linenum, arg, strerror(errno));
1.198 dtucker 985: if (val64 != 0 && val64 < 16)
986: fatal("%.200s line %d: RekeyLimit too small",
987: filename, linenum);
1.105 markus 988: }
1.165 djm 989: if (*activep && options->rekey_limit == -1)
1.249 dtucker 990: options->rekey_limit = val64;
1.198 dtucker 991: if (s != NULL) { /* optional rekey interval present */
992: if (strcmp(s, "none") == 0) {
993: (void)strdelim(&s); /* discard */
994: break;
995: }
996: intptr = &options->rekey_interval;
997: goto parse_time;
998: }
1.105 markus 999: break;
1000:
1.17 markus 1001: case oIdentityFile:
1.42 provos 1002: arg = strdelim(&s);
1.40 ho 1003: if (!arg || *arg == '\0')
1.17 markus 1004: fatal("%.200s line %d: Missing argument.", filename, linenum);
1005: if (*activep) {
1.50 markus 1006: intptr = &options->num_identity_files;
1.27 markus 1007: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 1008: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 1009: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.221 djm 1010: add_identity_file(options, NULL,
1011: arg, flags & SSHCONF_USERCONF);
1.17 markus 1012: }
1013: break;
1014:
1.241 djm 1015: case oCertificateFile:
1016: arg = strdelim(&s);
1017: if (!arg || *arg == '\0')
1018: fatal("%.200s line %d: Missing argument.",
1019: filename, linenum);
1020: if (*activep) {
1021: intptr = &options->num_certificate_files;
1022: if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
1023: fatal("%.200s line %d: Too many certificate "
1024: "files specified (max %d).",
1025: filename, linenum,
1026: SSH_MAX_CERTIFICATE_FILES);
1027: }
1028: add_certificate_file(options, arg,
1029: flags & SSHCONF_USERCONF);
1030: }
1031: break;
1032:
1.34 markus 1033: case oXAuthLocation:
1034: charptr=&options->xauth_location;
1035: goto parse_string;
1036:
1.17 markus 1037: case oUser:
1038: charptr = &options->user;
1039: parse_string:
1.42 provos 1040: arg = strdelim(&s);
1.40 ho 1041: if (!arg || *arg == '\0')
1.193 djm 1042: fatal("%.200s line %d: Missing argument.",
1043: filename, linenum);
1.17 markus 1044: if (*activep && *charptr == NULL)
1.38 provos 1045: *charptr = xstrdup(arg);
1.17 markus 1046: break;
1047:
1048: case oGlobalKnownHostsFile:
1.193 djm 1049: cpptr = (char **)&options->system_hostfiles;
1050: uintptr = &options->num_system_hostfiles;
1051: max_entries = SSH_MAX_HOSTS_FILES;
1052: parse_char_array:
1053: if (*activep && *uintptr == 0) {
1054: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1055: if ((*uintptr) >= max_entries)
1056: fatal("%s line %d: "
1057: "too many authorized keys files.",
1058: filename, linenum);
1059: cpptr[(*uintptr)++] = xstrdup(arg);
1060: }
1061: }
1062: return 0;
1.17 markus 1063:
1064: case oUserKnownHostsFile:
1.193 djm 1065: cpptr = (char **)&options->user_hostfiles;
1066: uintptr = &options->num_user_hostfiles;
1067: max_entries = SSH_MAX_HOSTS_FILES;
1068: goto parse_char_array;
1.27 markus 1069:
1.17 markus 1070: case oHostName:
1071: charptr = &options->hostname;
1072: goto parse_string;
1073:
1.52 markus 1074: case oHostKeyAlias:
1075: charptr = &options->host_key_alias;
1076: goto parse_string;
1077:
1.67 markus 1078: case oPreferredAuthentications:
1079: charptr = &options->preferred_authentications;
1080: goto parse_string;
1081:
1.77 markus 1082: case oBindAddress:
1083: charptr = &options->bind_address;
1084: goto parse_string;
1085:
1.183 markus 1086: case oPKCS11Provider:
1087: charptr = &options->pkcs11_provider;
1.86 markus 1088: goto parse_string;
1.85 jakob 1089:
1.17 markus 1090: case oProxyCommand:
1.144 reyk 1091: charptr = &options->proxy_command;
1.257 djm 1092: /* Ignore ProxyCommand if ProxyJump already specified */
1093: if (options->jump_host != NULL)
1094: charptr = &options->jump_host; /* Skip below */
1.144 reyk 1095: parse_command:
1.113 markus 1096: if (s == NULL)
1097: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 1098: len = strspn(s, WHITESPACE "=");
1.17 markus 1099: if (*activep && *charptr == NULL)
1.102 markus 1100: *charptr = xstrdup(s + len);
1.17 markus 1101: return 0;
1102:
1.257 djm 1103: case oProxyJump:
1104: if (s == NULL) {
1105: fatal("%.200s line %d: Missing argument.",
1106: filename, linenum);
1107: }
1108: len = strspn(s, WHITESPACE "=");
1109: if (parse_jump(s + len, options, *activep) == -1) {
1110: fatal("%.200s line %d: Invalid ProxyJump \"%s\"",
1111: filename, linenum, s + len);
1112: }
1113: return 0;
1114:
1.17 markus 1115: case oPort:
1116: intptr = &options->port;
1117: parse_int:
1.42 provos 1118: arg = strdelim(&s);
1.40 ho 1119: if (!arg || *arg == '\0')
1.17 markus 1120: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1121: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 1122: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 1123:
1124: /* Octal, decimal, or hex format? */
1.38 provos 1125: value = strtol(arg, &endofnumber, 0);
1126: if (arg == endofnumber)
1.21 markus 1127: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 1128: if (*activep && *intptr == -1)
1129: *intptr = value;
1130: break;
1131:
1132: case oConnectionAttempts:
1133: intptr = &options->connection_attempts;
1134: goto parse_int;
1135:
1.25 markus 1136: case oCiphers:
1.42 provos 1137: arg = strdelim(&s);
1.40 ho 1138: if (!arg || *arg == '\0')
1.32 markus 1139: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1140: if (*arg != '-' && !ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.31 markus 1141: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1142: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1143: if (*activep && options->ciphers == NULL)
1.38 provos 1144: options->ciphers = xstrdup(arg);
1.25 markus 1145: break;
1146:
1.62 markus 1147: case oMacs:
1148: arg = strdelim(&s);
1149: if (!arg || *arg == '\0')
1150: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1151: if (*arg != '-' && !mac_valid(*arg == '+' ? arg + 1 : arg))
1.62 markus 1152: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1153: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1154: if (*activep && options->macs == NULL)
1155: options->macs = xstrdup(arg);
1156: break;
1157:
1.189 djm 1158: case oKexAlgorithms:
1159: arg = strdelim(&s);
1160: if (!arg || *arg == '\0')
1161: fatal("%.200s line %d: Missing argument.",
1162: filename, linenum);
1.268 djm 1163: if (*arg != '-' &&
1164: !kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.189 djm 1165: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1166: filename, linenum, arg ? arg : "<NONE>");
1167: if (*activep && options->kex_algorithms == NULL)
1168: options->kex_algorithms = xstrdup(arg);
1169: break;
1170:
1.76 markus 1171: case oHostKeyAlgorithms:
1.238 markus 1172: charptr = &options->hostkeyalgorithms;
1173: parse_keytypes:
1.76 markus 1174: arg = strdelim(&s);
1175: if (!arg || *arg == '\0')
1.238 markus 1176: fatal("%.200s line %d: Missing argument.",
1177: filename, linenum);
1.268 djm 1178: if (*arg != '-' &&
1179: !sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.238 markus 1180: fatal("%s line %d: Bad key types '%s'.",
1181: filename, linenum, arg ? arg : "<NONE>");
1182: if (*activep && *charptr == NULL)
1183: *charptr = xstrdup(arg);
1.76 markus 1184: break;
1185:
1.17 markus 1186: case oLogLevel:
1.164 dtucker 1187: log_level_ptr = &options->log_level;
1.42 provos 1188: arg = strdelim(&s);
1.38 provos 1189: value = log_level_number(arg);
1.95 markus 1190: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1191: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1192: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1193: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1194: *log_level_ptr = (LogLevel) value;
1.17 markus 1195: break;
1196:
1.271 dtucker 1197: case oLogFacility:
1198: log_facility_ptr = &options->log_facility;
1199: arg = strdelim(&s);
1200: value = log_facility_number(arg);
1201: if (value == SYSLOG_FACILITY_NOT_SET)
1202: fatal("%.200s line %d: unsupported log facility '%s'",
1203: filename, linenum, arg ? arg : "<NONE>");
1204: if (*log_facility_ptr == -1)
1205: *log_facility_ptr = (SyslogFacility) value;
1206: break;
1207:
1.88 stevesk 1208: case oLocalForward:
1.17 markus 1209: case oRemoteForward:
1.168 stevesk 1210: case oDynamicForward:
1.42 provos 1211: arg = strdelim(&s);
1.135 djm 1212: if (arg == NULL || *arg == '\0')
1.88 stevesk 1213: fatal("%.200s line %d: Missing port argument.",
1214: filename, linenum);
1.135 djm 1215:
1.279 markus 1216: remotefwd = (opcode == oRemoteForward);
1217: dynamicfwd = (opcode == oDynamicForward);
1218:
1219: if (!dynamicfwd) {
1.168 stevesk 1220: arg2 = strdelim(&s);
1.279 markus 1221: if (arg2 == NULL || *arg2 == '\0') {
1222: if (remotefwd)
1223: dynamicfwd = 1;
1224: else
1225: fatal("%.200s line %d: Missing target "
1226: "argument.", filename, linenum);
1227: } else {
1228: /* construct a string for parse_forward */
1229: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg,
1230: arg2);
1231: }
1232: }
1233: if (dynamicfwd)
1.168 stevesk 1234: strlcpy(fwdarg, arg, sizeof(fwdarg));
1235:
1.279 markus 1236: if (parse_forward(&fwd, fwdarg, dynamicfwd, remotefwd) == 0)
1.88 stevesk 1237: fatal("%.200s line %d: Bad forwarding specification.",
1238: filename, linenum);
1.135 djm 1239:
1.88 stevesk 1240: if (*activep) {
1.279 markus 1241: if (remotefwd) {
1242: add_remote_forward(options, &fwd);
1243: } else {
1.135 djm 1244: add_local_forward(options, &fwd);
1.279 markus 1245: }
1.88 stevesk 1246: }
1.17 markus 1247: break;
1.71 markus 1248:
1.90 stevesk 1249: case oClearAllForwardings:
1250: intptr = &options->clear_forwardings;
1251: goto parse_flag;
1252:
1.17 markus 1253: case oHost:
1.206 djm 1254: if (cmdline)
1255: fatal("Host directive not supported as a command-line "
1256: "option");
1.17 markus 1257: *activep = 0;
1.191 djm 1258: arg2 = NULL;
1259: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.252 djm 1260: if ((flags & SSHCONF_NEVERMATCH) != 0)
1261: break;
1.191 djm 1262: negated = *arg == '!';
1263: if (negated)
1264: arg++;
1.38 provos 1265: if (match_pattern(host, arg)) {
1.191 djm 1266: if (negated) {
1267: debug("%.200s line %d: Skipping Host "
1268: "block because of negated match "
1269: "for %.100s", filename, linenum,
1270: arg);
1271: *activep = 0;
1272: break;
1273: }
1274: if (!*activep)
1275: arg2 = arg; /* logged below */
1.17 markus 1276: *activep = 1;
1277: }
1.191 djm 1278: }
1279: if (*activep)
1280: debug("%.200s line %d: Applying options for %.100s",
1281: filename, linenum, arg2);
1.42 provos 1282: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1283: return 0;
1284:
1.206 djm 1285: case oMatch:
1286: if (cmdline)
1287: fatal("Host directive not supported as a command-line "
1288: "option");
1.221 djm 1289: value = match_cfg_line(options, &s, pw, host, original_host,
1290: flags & SSHCONF_POSTCANON, filename, linenum);
1.206 djm 1291: if (value < 0)
1292: fatal("%.200s line %d: Bad Match condition", filename,
1293: linenum);
1.252 djm 1294: *activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
1.206 djm 1295: break;
1296:
1.17 markus 1297: case oEscapeChar:
1298: intptr = &options->escape_char;
1.42 provos 1299: arg = strdelim(&s);
1.40 ho 1300: if (!arg || *arg == '\0')
1.17 markus 1301: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.236 djm 1302: if (strcmp(arg, "none") == 0)
1303: value = SSH_ESCAPECHAR_NONE;
1304: else if (arg[1] == '\0')
1305: value = (u_char) arg[0];
1306: else if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1307: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1308: value = (u_char) arg[1] & 31;
1.17 markus 1309: else {
1310: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1311: filename, linenum);
1.17 markus 1312: /* NOTREACHED */
1313: value = 0; /* Avoid compiler warning. */
1314: }
1315: if (*activep && *intptr == -1)
1316: *intptr = value;
1.112 djm 1317: break;
1318:
1319: case oAddressFamily:
1.114 djm 1320: intptr = &options->address_family;
1.207 djm 1321: multistate_ptr = multistate_addressfamily;
1322: goto parse_multistate;
1.17 markus 1323:
1.101 markus 1324: case oEnableSSHKeysign:
1325: intptr = &options->enable_ssh_keysign;
1326: goto parse_flag;
1327:
1.128 markus 1328: case oIdentitiesOnly:
1329: intptr = &options->identities_only;
1330: goto parse_flag;
1331:
1.127 markus 1332: case oServerAliveInterval:
1333: intptr = &options->server_alive_interval;
1334: goto parse_time;
1335:
1336: case oServerAliveCountMax:
1337: intptr = &options->server_alive_count_max;
1338: goto parse_int;
1339:
1.130 djm 1340: case oSendEnv:
1341: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1342: if (strchr(arg, '=') != NULL)
1343: fatal("%s line %d: Invalid environment name.",
1344: filename, linenum);
1.137 djm 1345: if (!*activep)
1346: continue;
1.130 djm 1347: if (options->num_send_env >= MAX_SEND_ENV)
1348: fatal("%s line %d: too many send env.",
1349: filename, linenum);
1350: options->send_env[options->num_send_env++] =
1351: xstrdup(arg);
1352: }
1353: break;
1354:
1.132 djm 1355: case oControlPath:
1356: charptr = &options->control_path;
1357: goto parse_string;
1358:
1359: case oControlMaster:
1360: intptr = &options->control_master;
1.207 djm 1361: multistate_ptr = multistate_controlmaster;
1362: goto parse_multistate;
1.132 djm 1363:
1.187 djm 1364: case oControlPersist:
1365: /* no/false/yes/true, or a time spec */
1366: intptr = &options->control_persist;
1367: arg = strdelim(&s);
1368: if (!arg || *arg == '\0')
1369: fatal("%.200s line %d: Missing ControlPersist"
1370: " argument.", filename, linenum);
1371: value = 0;
1372: value2 = 0; /* timeout */
1373: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1374: value = 0;
1375: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1376: value = 1;
1377: else if ((value2 = convtime(arg)) >= 0)
1378: value = 1;
1379: else
1380: fatal("%.200s line %d: Bad ControlPersist argument.",
1381: filename, linenum);
1382: if (*activep && *intptr == -1) {
1383: *intptr = value;
1384: options->control_persist_timeout = value2;
1385: }
1386: break;
1387:
1.136 djm 1388: case oHashKnownHosts:
1389: intptr = &options->hash_known_hosts;
1390: goto parse_flag;
1391:
1.144 reyk 1392: case oTunnel:
1393: intptr = &options->tun_open;
1.207 djm 1394: multistate_ptr = multistate_tunnel;
1395: goto parse_multistate;
1.144 reyk 1396:
1397: case oTunnelDevice:
1398: arg = strdelim(&s);
1399: if (!arg || *arg == '\0')
1400: fatal("%.200s line %d: Missing argument.", filename, linenum);
1401: value = a2tun(arg, &value2);
1.145 reyk 1402: if (value == SSH_TUNID_ERR)
1.144 reyk 1403: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1404: if (*activep) {
1405: options->tun_local = value;
1406: options->tun_remote = value2;
1407: }
1408: break;
1409:
1410: case oLocalCommand:
1411: charptr = &options->local_command;
1412: goto parse_command;
1413:
1414: case oPermitLocalCommand:
1415: intptr = &options->permit_local_command;
1416: goto parse_flag;
1417:
1.277 bluhm 1418: case oRemoteCommand:
1419: charptr = &options->remote_command;
1420: goto parse_command;
1421:
1.167 grunk 1422: case oVisualHostKey:
1423: intptr = &options->visual_host_key;
1424: goto parse_flag;
1425:
1.252 djm 1426: case oInclude:
1427: if (cmdline)
1428: fatal("Include directive not supported as a "
1429: "command-line option");
1430: value = 0;
1431: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1432: /*
1433: * Ensure all paths are anchored. User configuration
1434: * files may begin with '~/' but system configurations
1435: * must not. If the path is relative, then treat it
1436: * as living in ~/.ssh for user configurations or
1437: * /etc/ssh for system ones.
1438: */
1439: if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0)
1440: fatal("%.200s line %d: bad include path %s.",
1441: filename, linenum, arg);
1442: if (*arg != '/' && *arg != '~') {
1443: xasprintf(&arg2, "%s/%s",
1444: (flags & SSHCONF_USERCONF) ?
1445: "~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
1446: } else
1447: arg2 = xstrdup(arg);
1448: memset(&gl, 0, sizeof(gl));
1449: r = glob(arg2, GLOB_TILDE, NULL, &gl);
1450: if (r == GLOB_NOMATCH) {
1451: debug("%.200s line %d: include %s matched no "
1452: "files",filename, linenum, arg2);
1.269 dtucker 1453: free(arg2);
1.252 djm 1454: continue;
1455: } else if (r != 0 || gl.gl_pathc < 0)
1456: fatal("%.200s line %d: glob failed for %s.",
1457: filename, linenum, arg2);
1458: free(arg2);
1459: oactive = *activep;
1460: for (i = 0; i < (u_int)gl.gl_pathc; i++) {
1461: debug3("%.200s line %d: Including file %s "
1462: "depth %d%s", filename, linenum,
1463: gl.gl_pathv[i], depth,
1464: oactive ? "" : " (parse only)");
1465: r = read_config_file_depth(gl.gl_pathv[i],
1466: pw, host, original_host, options,
1467: flags | SSHCONF_CHECKPERM |
1468: (oactive ? 0 : SSHCONF_NEVERMATCH),
1469: activep, depth + 1);
1.264 djm 1470: if (r != 1 && errno != ENOENT) {
1.263 djm 1471: fatal("Can't open user config file "
1472: "%.100s: %.100s", gl.gl_pathv[i],
1473: strerror(errno));
1474: }
1.252 djm 1475: /*
1476: * don't let Match in includes clobber the
1477: * containing file's Match state.
1478: */
1479: *activep = oactive;
1480: if (r != 1)
1481: value = -1;
1482: }
1483: globfree(&gl);
1484: }
1485: if (value != 0)
1486: return value;
1487: break;
1488:
1.190 djm 1489: case oIPQoS:
1490: arg = strdelim(&s);
1491: if ((value = parse_ipqos(arg)) == -1)
1492: fatal("%s line %d: Bad IPQoS value: %s",
1493: filename, linenum, arg);
1494: arg = strdelim(&s);
1495: if (arg == NULL)
1496: value2 = value;
1497: else if ((value2 = parse_ipqos(arg)) == -1)
1498: fatal("%s line %d: Bad IPQoS value: %s",
1499: filename, linenum, arg);
1500: if (*activep) {
1501: options->ip_qos_interactive = value;
1502: options->ip_qos_bulk = value2;
1503: }
1504: break;
1505:
1.192 djm 1506: case oRequestTTY:
1507: intptr = &options->request_tty;
1.207 djm 1508: multistate_ptr = multistate_requesttty;
1509: goto parse_multistate;
1.192 djm 1510:
1.199 djm 1511: case oIgnoreUnknown:
1512: charptr = &options->ignored_unknown;
1513: goto parse_string;
1514:
1.205 djm 1515: case oProxyUseFdpass:
1516: intptr = &options->proxy_use_fdpass;
1517: goto parse_flag;
1518:
1.208 djm 1519: case oCanonicalDomains:
1520: value = options->num_canonical_domains != 0;
1521: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.280 ! millert 1522: const char *errstr;
! 1523: if (!valid_domain(arg, 1, &errstr)) {
! 1524: fatal("%s line %d: %s", filename, linenum,
! 1525: errstr);
! 1526: }
1.208 djm 1527: if (!*activep || value)
1528: continue;
1529: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1530: fatal("%s line %d: too many hostname suffixes.",
1531: filename, linenum);
1532: options->canonical_domains[
1533: options->num_canonical_domains++] = xstrdup(arg);
1534: }
1535: break;
1536:
1.209 djm 1537: case oCanonicalizePermittedCNAMEs:
1.208 djm 1538: value = options->num_permitted_cnames != 0;
1539: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1540: /* Either '*' for everything or 'list:list' */
1541: if (strcmp(arg, "*") == 0)
1542: arg2 = arg;
1543: else {
1544: lowercase(arg);
1545: if ((arg2 = strchr(arg, ':')) == NULL ||
1546: arg2[1] == '\0') {
1547: fatal("%s line %d: "
1548: "Invalid permitted CNAME \"%s\"",
1549: filename, linenum, arg);
1550: }
1551: *arg2 = '\0';
1552: arg2++;
1553: }
1554: if (!*activep || value)
1555: continue;
1556: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1557: fatal("%s line %d: too many permitted CNAMEs.",
1558: filename, linenum);
1559: cname = options->permitted_cnames +
1560: options->num_permitted_cnames++;
1561: cname->source_list = xstrdup(arg);
1562: cname->target_list = xstrdup(arg2);
1563: }
1564: break;
1565:
1.209 djm 1566: case oCanonicalizeHostname:
1567: intptr = &options->canonicalize_hostname;
1568: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1569: goto parse_multistate;
1570:
1.209 djm 1571: case oCanonicalizeMaxDots:
1572: intptr = &options->canonicalize_max_dots;
1.208 djm 1573: goto parse_int;
1574:
1.209 djm 1575: case oCanonicalizeFallbackLocal:
1576: intptr = &options->canonicalize_fallback_local;
1.208 djm 1577: goto parse_flag;
1578:
1.220 millert 1579: case oStreamLocalBindMask:
1580: arg = strdelim(&s);
1581: if (!arg || *arg == '\0')
1582: fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum);
1583: /* Parse mode in octal format */
1584: value = strtol(arg, &endofnumber, 8);
1585: if (arg == endofnumber || value < 0 || value > 0777)
1586: fatal("%.200s line %d: Bad mask.", filename, linenum);
1587: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1588: break;
1589:
1590: case oStreamLocalBindUnlink:
1591: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1592: goto parse_flag;
1593:
1.223 djm 1594: case oRevokedHostKeys:
1595: charptr = &options->revoked_host_keys;
1596: goto parse_string;
1597:
1.224 djm 1598: case oFingerprintHash:
1.225 djm 1599: intptr = &options->fingerprint_hash;
1.224 djm 1600: arg = strdelim(&s);
1601: if (!arg || *arg == '\0')
1602: fatal("%.200s line %d: Missing argument.",
1603: filename, linenum);
1604: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1605: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1606: filename, linenum, arg);
1.225 djm 1607: if (*activep && *intptr == -1)
1608: *intptr = value;
1.224 djm 1609: break;
1610:
1.229 djm 1611: case oUpdateHostkeys:
1612: intptr = &options->update_hostkeys;
1.232 djm 1613: multistate_ptr = multistate_yesnoask;
1614: goto parse_multistate;
1.229 djm 1615:
1.230 djm 1616: case oHostbasedKeyTypes:
1617: charptr = &options->hostbased_key_types;
1.238 markus 1618: goto parse_keytypes;
1619:
1620: case oPubkeyAcceptedKeyTypes:
1621: charptr = &options->pubkey_key_types;
1622: goto parse_keytypes;
1.230 djm 1623:
1.246 jcs 1624: case oAddKeysToAgent:
1625: intptr = &options->add_keys_to_agent;
1626: multistate_ptr = multistate_yesnoaskconfirm;
1627: goto parse_multistate;
1628:
1.253 markus 1629: case oIdentityAgent:
1630: charptr = &options->identity_agent;
1631: goto parse_string;
1632:
1.96 markus 1633: case oDeprecated:
1.98 markus 1634: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1635: filename, linenum, keyword);
1.98 markus 1636: return 0;
1.96 markus 1637:
1.110 jakob 1638: case oUnsupported:
1639: error("%s line %d: Unsupported option \"%s\"",
1640: filename, linenum, keyword);
1641: return 0;
1642:
1.17 markus 1643: default:
1.221 djm 1644: fatal("%s: Unimplemented opcode %d", __func__, opcode);
1.17 markus 1645: }
1646:
1647: /* Check that there is no garbage at end of line. */
1.57 djm 1648: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1649: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1650: filename, linenum, arg);
1.39 ho 1651: }
1.17 markus 1652: return 0;
1.1 deraadt 1653: }
1654:
1.19 markus 1655: /*
1656: * Reads the config file and modifies the options accordingly. Options
1657: * should already be initialized before this call. This never returns if
1.89 stevesk 1658: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1659: */
1.89 stevesk 1660: int
1.206 djm 1661: read_config_file(const char *filename, struct passwd *pw, const char *host,
1.221 djm 1662: const char *original_host, Options *options, int flags)
1.1 deraadt 1663: {
1.252 djm 1664: int active = 1;
1665:
1666: return read_config_file_depth(filename, pw, host, original_host,
1667: options, flags, &active, 0);
1668: }
1669:
1670: #define READCONF_MAX_DEPTH 16
1671: static int
1672: read_config_file_depth(const char *filename, struct passwd *pw,
1673: const char *host, const char *original_host, Options *options,
1674: int flags, int *activep, int depth)
1675: {
1.17 markus 1676: FILE *f;
1.270 djm 1677: char line[4096];
1.252 djm 1678: int linenum;
1.17 markus 1679: int bad_options = 0;
1680:
1.252 djm 1681: if (depth < 0 || depth > READCONF_MAX_DEPTH)
1682: fatal("Too many recursive configuration includes");
1683:
1.129 djm 1684: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1685: return 0;
1.129 djm 1686:
1.196 dtucker 1687: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1688: struct stat sb;
1.134 deraadt 1689:
1.131 dtucker 1690: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1691: fatal("fstat %s: %s", filename, strerror(errno));
1692: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1693: (sb.st_mode & 022) != 0))
1.129 djm 1694: fatal("Bad owner or permissions on %s", filename);
1695: }
1.17 markus 1696:
1697: debug("Reading configuration data %.200s", filename);
1698:
1.19 markus 1699: /*
1700: * Mark that we are now processing the options. This flag is turned
1701: * on/off by Host specifications.
1702: */
1.17 markus 1703: linenum = 0;
1704: while (fgets(line, sizeof(line), f)) {
1705: /* Update line number counter. */
1706: linenum++;
1.270 djm 1707: if (strlen(line) == sizeof(line) - 1)
1708: fatal("%s line %d too long", filename, linenum);
1.252 djm 1709: if (process_config_line_depth(options, pw, host, original_host,
1710: line, filename, linenum, activep, flags, depth) != 0)
1.17 markus 1711: bad_options++;
1712: }
1713: fclose(f);
1714: if (bad_options > 0)
1.64 millert 1715: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1716: filename, bad_options);
1.89 stevesk 1717: return 1;
1.1 deraadt 1718: }
1719:
1.218 djm 1720: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1721: int
1722: option_clear_or_none(const char *o)
1723: {
1724: return o == NULL || strcasecmp(o, "none") == 0;
1725: }
1726:
1.19 markus 1727: /*
1728: * Initializes options to special values that indicate that they have not yet
1729: * been set. Read_config_file will only set options with this value. Options
1730: * are processed in the following order: command line, user config file,
1731: * system config file. Last, fill_default_options is called.
1732: */
1.1 deraadt 1733:
1.26 markus 1734: void
1.17 markus 1735: initialize_options(Options * options)
1.1 deraadt 1736: {
1.17 markus 1737: memset(options, 'X', sizeof(*options));
1738: options->forward_agent = -1;
1739: options->forward_x11 = -1;
1.123 markus 1740: options->forward_x11_trusted = -1;
1.186 djm 1741: options->forward_x11_timeout = -1;
1.255 dtucker 1742: options->stdio_forward_host = NULL;
1743: options->stdio_forward_port = 0;
1.256 dtucker 1744: options->clear_forwardings = -1;
1.153 markus 1745: options->exit_on_forward_failure = -1;
1.34 markus 1746: options->xauth_location = NULL;
1.220 millert 1747: options->fwd_opts.gateway_ports = -1;
1748: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
1749: options->fwd_opts.streamlocal_bind_unlink = -1;
1.17 markus 1750: options->use_privileged_port = -1;
1.50 markus 1751: options->pubkey_authentication = -1;
1.78 markus 1752: options->challenge_response_authentication = -1;
1.118 markus 1753: options->gss_authentication = -1;
1754: options->gss_deleg_creds = -1;
1.17 markus 1755: options->password_authentication = -1;
1.48 markus 1756: options->kbd_interactive_authentication = -1;
1757: options->kbd_interactive_devices = NULL;
1.72 markus 1758: options->hostbased_authentication = -1;
1.17 markus 1759: options->batch_mode = -1;
1760: options->check_host_ip = -1;
1761: options->strict_host_key_checking = -1;
1762: options->compression = -1;
1.126 markus 1763: options->tcp_keep_alive = -1;
1.17 markus 1764: options->port = -1;
1.114 djm 1765: options->address_family = -1;
1.17 markus 1766: options->connection_attempts = -1;
1.111 djm 1767: options->connection_timeout = -1;
1.17 markus 1768: options->number_of_password_prompts = -1;
1.25 markus 1769: options->ciphers = NULL;
1.62 markus 1770: options->macs = NULL;
1.189 djm 1771: options->kex_algorithms = NULL;
1.76 markus 1772: options->hostkeyalgorithms = NULL;
1.17 markus 1773: options->num_identity_files = 0;
1.241 djm 1774: options->num_certificate_files = 0;
1.17 markus 1775: options->hostname = NULL;
1.52 markus 1776: options->host_key_alias = NULL;
1.17 markus 1777: options->proxy_command = NULL;
1.257 djm 1778: options->jump_user = NULL;
1779: options->jump_host = NULL;
1780: options->jump_port = -1;
1781: options->jump_extra = NULL;
1.17 markus 1782: options->user = NULL;
1783: options->escape_char = -1;
1.193 djm 1784: options->num_system_hostfiles = 0;
1785: options->num_user_hostfiles = 0;
1.185 djm 1786: options->local_forwards = NULL;
1.17 markus 1787: options->num_local_forwards = 0;
1.185 djm 1788: options->remote_forwards = NULL;
1.17 markus 1789: options->num_remote_forwards = 0;
1.271 dtucker 1790: options->log_facility = SYSLOG_FACILITY_NOT_SET;
1.95 markus 1791: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1792: options->preferred_authentications = NULL;
1.77 markus 1793: options->bind_address = NULL;
1.183 markus 1794: options->pkcs11_provider = NULL;
1.101 markus 1795: options->enable_ssh_keysign = - 1;
1.91 markus 1796: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1797: options->identities_only = - 1;
1.105 markus 1798: options->rekey_limit = - 1;
1.198 dtucker 1799: options->rekey_interval = -1;
1.107 jakob 1800: options->verify_host_key_dns = -1;
1.127 markus 1801: options->server_alive_interval = -1;
1802: options->server_alive_count_max = -1;
1.130 djm 1803: options->num_send_env = 0;
1.132 djm 1804: options->control_path = NULL;
1805: options->control_master = -1;
1.187 djm 1806: options->control_persist = -1;
1807: options->control_persist_timeout = 0;
1.136 djm 1808: options->hash_known_hosts = -1;
1.144 reyk 1809: options->tun_open = -1;
1810: options->tun_local = -1;
1811: options->tun_remote = -1;
1812: options->local_command = NULL;
1813: options->permit_local_command = -1;
1.277 bluhm 1814: options->remote_command = NULL;
1.246 jcs 1815: options->add_keys_to_agent = -1;
1.253 markus 1816: options->identity_agent = NULL;
1.167 grunk 1817: options->visual_host_key = -1;
1.190 djm 1818: options->ip_qos_interactive = -1;
1819: options->ip_qos_bulk = -1;
1.192 djm 1820: options->request_tty = -1;
1.205 djm 1821: options->proxy_use_fdpass = -1;
1.199 djm 1822: options->ignored_unknown = NULL;
1.208 djm 1823: options->num_canonical_domains = 0;
1824: options->num_permitted_cnames = 0;
1.209 djm 1825: options->canonicalize_max_dots = -1;
1826: options->canonicalize_fallback_local = -1;
1827: options->canonicalize_hostname = -1;
1.223 djm 1828: options->revoked_host_keys = NULL;
1.224 djm 1829: options->fingerprint_hash = -1;
1.229 djm 1830: options->update_hostkeys = -1;
1.230 djm 1831: options->hostbased_key_types = NULL;
1.238 markus 1832: options->pubkey_key_types = NULL;
1.1 deraadt 1833: }
1834:
1.19 markus 1835: /*
1.218 djm 1836: * A petite version of fill_default_options() that just fills the options
1837: * needed for hostname canonicalization to proceed.
1838: */
1839: void
1840: fill_default_options_for_canonicalization(Options *options)
1841: {
1842: if (options->canonicalize_max_dots == -1)
1843: options->canonicalize_max_dots = 1;
1844: if (options->canonicalize_fallback_local == -1)
1845: options->canonicalize_fallback_local = 1;
1846: if (options->canonicalize_hostname == -1)
1847: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1848: }
1849:
1850: /*
1.19 markus 1851: * Called after processing other sources of option data, this fills those
1852: * options for which no value has been specified with their default values.
1853: */
1.26 markus 1854: void
1.17 markus 1855: fill_default_options(Options * options)
1.1 deraadt 1856: {
1.17 markus 1857: if (options->forward_agent == -1)
1.33 markus 1858: options->forward_agent = 0;
1.17 markus 1859: if (options->forward_x11 == -1)
1.23 markus 1860: options->forward_x11 = 0;
1.123 markus 1861: if (options->forward_x11_trusted == -1)
1862: options->forward_x11_trusted = 0;
1.186 djm 1863: if (options->forward_x11_timeout == -1)
1864: options->forward_x11_timeout = 1200;
1.256 dtucker 1865: /*
1866: * stdio forwarding (-W) changes the default for these but we defer
1867: * setting the values so they can be overridden.
1868: */
1.153 markus 1869: if (options->exit_on_forward_failure == -1)
1.256 dtucker 1870: options->exit_on_forward_failure =
1871: options->stdio_forward_host != NULL ? 1 : 0;
1872: if (options->clear_forwardings == -1)
1873: options->clear_forwardings =
1874: options->stdio_forward_host != NULL ? 1 : 0;
1875: if (options->clear_forwardings == 1)
1876: clear_forwardings(options);
1877:
1.34 markus 1878: if (options->xauth_location == NULL)
1.80 markus 1879: options->xauth_location = _PATH_XAUTH;
1.220 millert 1880: if (options->fwd_opts.gateway_ports == -1)
1881: options->fwd_opts.gateway_ports = 0;
1882: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
1883: options->fwd_opts.streamlocal_bind_mask = 0177;
1884: if (options->fwd_opts.streamlocal_bind_unlink == -1)
1885: options->fwd_opts.streamlocal_bind_unlink = 0;
1.17 markus 1886: if (options->use_privileged_port == -1)
1.65 markus 1887: options->use_privileged_port = 0;
1.50 markus 1888: if (options->pubkey_authentication == -1)
1889: options->pubkey_authentication = 1;
1.78 markus 1890: if (options->challenge_response_authentication == -1)
1.83 markus 1891: options->challenge_response_authentication = 1;
1.118 markus 1892: if (options->gss_authentication == -1)
1.122 markus 1893: options->gss_authentication = 0;
1.118 markus 1894: if (options->gss_deleg_creds == -1)
1895: options->gss_deleg_creds = 0;
1.17 markus 1896: if (options->password_authentication == -1)
1897: options->password_authentication = 1;
1.48 markus 1898: if (options->kbd_interactive_authentication == -1)
1.59 markus 1899: options->kbd_interactive_authentication = 1;
1.72 markus 1900: if (options->hostbased_authentication == -1)
1901: options->hostbased_authentication = 0;
1.17 markus 1902: if (options->batch_mode == -1)
1903: options->batch_mode = 0;
1904: if (options->check_host_ip == -1)
1905: options->check_host_ip = 1;
1906: if (options->strict_host_key_checking == -1)
1.278 djm 1907: options->strict_host_key_checking = SSH_STRICT_HOSTKEY_ASK;
1.17 markus 1908: if (options->compression == -1)
1909: options->compression = 0;
1.126 markus 1910: if (options->tcp_keep_alive == -1)
1911: options->tcp_keep_alive = 1;
1.17 markus 1912: if (options->port == -1)
1913: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1914: if (options->address_family == -1)
1915: options->address_family = AF_UNSPEC;
1.17 markus 1916: if (options->connection_attempts == -1)
1.84 markus 1917: options->connection_attempts = 1;
1.17 markus 1918: if (options->number_of_password_prompts == -1)
1919: options->number_of_password_prompts = 3;
1.76 markus 1920: /* options->hostkeyalgorithms, default set in myproposals.h */
1.246 jcs 1921: if (options->add_keys_to_agent == -1)
1922: options->add_keys_to_agent = 0;
1.17 markus 1923: if (options->num_identity_files == 0) {
1.273 djm 1924: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_RSA, 0);
1925: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_DSA, 0);
1926: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_ECDSA, 0);
1927: add_identity_file(options, "~/",
1928: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.27 markus 1929: }
1.17 markus 1930: if (options->escape_char == -1)
1931: options->escape_char = '~';
1.193 djm 1932: if (options->num_system_hostfiles == 0) {
1933: options->system_hostfiles[options->num_system_hostfiles++] =
1934: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1935: options->system_hostfiles[options->num_system_hostfiles++] =
1936: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1937: }
1938: if (options->num_user_hostfiles == 0) {
1939: options->user_hostfiles[options->num_user_hostfiles++] =
1940: xstrdup(_PATH_SSH_USER_HOSTFILE);
1941: options->user_hostfiles[options->num_user_hostfiles++] =
1942: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1943: }
1.95 markus 1944: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1945: options->log_level = SYSLOG_LEVEL_INFO;
1.271 dtucker 1946: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1947: options->log_facility = SYSLOG_FACILITY_USER;
1.91 markus 1948: if (options->no_host_authentication_for_localhost == - 1)
1949: options->no_host_authentication_for_localhost = 0;
1.128 markus 1950: if (options->identities_only == -1)
1951: options->identities_only = 0;
1.101 markus 1952: if (options->enable_ssh_keysign == -1)
1953: options->enable_ssh_keysign = 0;
1.105 markus 1954: if (options->rekey_limit == -1)
1955: options->rekey_limit = 0;
1.198 dtucker 1956: if (options->rekey_interval == -1)
1957: options->rekey_interval = 0;
1.107 jakob 1958: if (options->verify_host_key_dns == -1)
1959: options->verify_host_key_dns = 0;
1.127 markus 1960: if (options->server_alive_interval == -1)
1961: options->server_alive_interval = 0;
1962: if (options->server_alive_count_max == -1)
1963: options->server_alive_count_max = 3;
1.132 djm 1964: if (options->control_master == -1)
1965: options->control_master = 0;
1.187 djm 1966: if (options->control_persist == -1) {
1967: options->control_persist = 0;
1968: options->control_persist_timeout = 0;
1969: }
1.136 djm 1970: if (options->hash_known_hosts == -1)
1971: options->hash_known_hosts = 0;
1.144 reyk 1972: if (options->tun_open == -1)
1.145 reyk 1973: options->tun_open = SSH_TUNMODE_NO;
1974: if (options->tun_local == -1)
1975: options->tun_local = SSH_TUNID_ANY;
1976: if (options->tun_remote == -1)
1977: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1978: if (options->permit_local_command == -1)
1979: options->permit_local_command = 0;
1.167 grunk 1980: if (options->visual_host_key == -1)
1981: options->visual_host_key = 0;
1.190 djm 1982: if (options->ip_qos_interactive == -1)
1983: options->ip_qos_interactive = IPTOS_LOWDELAY;
1984: if (options->ip_qos_bulk == -1)
1985: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1986: if (options->request_tty == -1)
1987: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 1988: if (options->proxy_use_fdpass == -1)
1989: options->proxy_use_fdpass = 0;
1.209 djm 1990: if (options->canonicalize_max_dots == -1)
1991: options->canonicalize_max_dots = 1;
1992: if (options->canonicalize_fallback_local == -1)
1993: options->canonicalize_fallback_local = 1;
1994: if (options->canonicalize_hostname == -1)
1995: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.224 djm 1996: if (options->fingerprint_hash == -1)
1997: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.229 djm 1998: if (options->update_hostkeys == -1)
1.231 djm 1999: options->update_hostkeys = 0;
1.239 djm 2000: if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 ||
2001: kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 ||
2002: kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 ||
2003: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2004: &options->hostbased_key_types) != 0 ||
2005: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2006: &options->pubkey_key_types) != 0)
2007: fatal("%s: kex_assemble_names failed", __func__);
1.224 djm 2008:
1.207 djm 2009: #define CLEAR_ON_NONE(v) \
2010: do { \
1.218 djm 2011: if (option_clear_or_none(v)) { \
1.207 djm 2012: free(v); \
2013: v = NULL; \
2014: } \
2015: } while(0)
2016: CLEAR_ON_NONE(options->local_command);
1.277 bluhm 2017: CLEAR_ON_NONE(options->remote_command);
1.207 djm 2018: CLEAR_ON_NONE(options->proxy_command);
2019: CLEAR_ON_NONE(options->control_path);
1.223 djm 2020: CLEAR_ON_NONE(options->revoked_host_keys);
1.254 markus 2021: /* options->identity_agent distinguishes NULL from 'none' */
1.17 markus 2022: /* options->user will be set in the main program if appropriate */
2023: /* options->hostname will be set in the main program if appropriate */
1.52 markus 2024: /* options->host_key_alias should not be set by default */
1.67 markus 2025: /* options->preferred_authentications will be set in ssh */
1.135 djm 2026: }
2027:
1.220 millert 2028: struct fwdarg {
2029: char *arg;
2030: int ispath;
2031: };
2032:
2033: /*
2034: * parse_fwd_field
2035: * parses the next field in a port forwarding specification.
2036: * sets fwd to the parsed field and advances p past the colon
2037: * or sets it to NULL at end of string.
2038: * returns 0 on success, else non-zero.
2039: */
2040: static int
2041: parse_fwd_field(char **p, struct fwdarg *fwd)
2042: {
2043: char *ep, *cp = *p;
2044: int ispath = 0;
2045:
2046: if (*cp == '\0') {
2047: *p = NULL;
2048: return -1; /* end of string */
2049: }
2050:
2051: /*
2052: * A field escaped with square brackets is used literally.
2053: * XXX - allow ']' to be escaped via backslash?
2054: */
2055: if (*cp == '[') {
2056: /* find matching ']' */
2057: for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
2058: if (*ep == '/')
2059: ispath = 1;
2060: }
2061: /* no matching ']' or not at end of field. */
2062: if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
2063: return -1;
2064: /* NUL terminate the field and advance p past the colon */
2065: *ep++ = '\0';
2066: if (*ep != '\0')
2067: *ep++ = '\0';
2068: fwd->arg = cp + 1;
2069: fwd->ispath = ispath;
2070: *p = ep;
2071: return 0;
2072: }
2073:
2074: for (cp = *p; *cp != '\0'; cp++) {
2075: switch (*cp) {
2076: case '\\':
2077: memmove(cp, cp + 1, strlen(cp + 1) + 1);
1.237 djm 2078: if (*cp == '\0')
2079: return -1;
1.220 millert 2080: break;
2081: case '/':
2082: ispath = 1;
2083: break;
2084: case ':':
2085: *cp++ = '\0';
2086: goto done;
2087: }
2088: }
2089: done:
2090: fwd->arg = *p;
2091: fwd->ispath = ispath;
2092: *p = cp;
2093: return 0;
2094: }
2095:
1.135 djm 2096: /*
2097: * parse_forward
2098: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 2099: * dynamicfwd == 0
1.220 millert 2100: * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
2101: * listenpath:connectpath
1.168 stevesk 2102: * dynamicfwd == 1
2103: * [listenhost:]listenport
1.135 djm 2104: * returns number of arguments parsed or zero on error
2105: */
2106: int
1.220 millert 2107: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 2108: {
1.220 millert 2109: struct fwdarg fwdargs[4];
2110: char *p, *cp;
1.135 djm 2111: int i;
2112:
1.220 millert 2113: memset(fwd, 0, sizeof(*fwd));
2114: memset(fwdargs, 0, sizeof(fwdargs));
1.135 djm 2115:
2116: cp = p = xstrdup(fwdspec);
2117:
2118: /* skip leading spaces */
1.214 deraadt 2119: while (isspace((u_char)*cp))
1.135 djm 2120: cp++;
2121:
1.220 millert 2122: for (i = 0; i < 4; ++i) {
2123: if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.135 djm 2124: break;
1.220 millert 2125: }
1.135 djm 2126:
1.170 stevesk 2127: /* Check for trailing garbage */
1.220 millert 2128: if (cp != NULL && *cp != '\0') {
1.135 djm 2129: i = 0; /* failure */
1.220 millert 2130: }
1.135 djm 2131:
2132: switch (i) {
1.168 stevesk 2133: case 1:
1.220 millert 2134: if (fwdargs[0].ispath) {
2135: fwd->listen_path = xstrdup(fwdargs[0].arg);
2136: fwd->listen_port = PORT_STREAMLOCAL;
2137: } else {
2138: fwd->listen_host = NULL;
2139: fwd->listen_port = a2port(fwdargs[0].arg);
2140: }
1.168 stevesk 2141: fwd->connect_host = xstrdup("socks");
2142: break;
2143:
2144: case 2:
1.220 millert 2145: if (fwdargs[0].ispath && fwdargs[1].ispath) {
2146: fwd->listen_path = xstrdup(fwdargs[0].arg);
2147: fwd->listen_port = PORT_STREAMLOCAL;
2148: fwd->connect_path = xstrdup(fwdargs[1].arg);
2149: fwd->connect_port = PORT_STREAMLOCAL;
2150: } else if (fwdargs[1].ispath) {
2151: fwd->listen_host = NULL;
2152: fwd->listen_port = a2port(fwdargs[0].arg);
2153: fwd->connect_path = xstrdup(fwdargs[1].arg);
2154: fwd->connect_port = PORT_STREAMLOCAL;
2155: } else {
2156: fwd->listen_host = xstrdup(fwdargs[0].arg);
2157: fwd->listen_port = a2port(fwdargs[1].arg);
2158: fwd->connect_host = xstrdup("socks");
2159: }
1.168 stevesk 2160: break;
2161:
1.135 djm 2162: case 3:
1.220 millert 2163: if (fwdargs[0].ispath) {
2164: fwd->listen_path = xstrdup(fwdargs[0].arg);
2165: fwd->listen_port = PORT_STREAMLOCAL;
2166: fwd->connect_host = xstrdup(fwdargs[1].arg);
2167: fwd->connect_port = a2port(fwdargs[2].arg);
2168: } else if (fwdargs[2].ispath) {
2169: fwd->listen_host = xstrdup(fwdargs[0].arg);
2170: fwd->listen_port = a2port(fwdargs[1].arg);
2171: fwd->connect_path = xstrdup(fwdargs[2].arg);
2172: fwd->connect_port = PORT_STREAMLOCAL;
2173: } else {
2174: fwd->listen_host = NULL;
2175: fwd->listen_port = a2port(fwdargs[0].arg);
2176: fwd->connect_host = xstrdup(fwdargs[1].arg);
2177: fwd->connect_port = a2port(fwdargs[2].arg);
2178: }
1.135 djm 2179: break;
2180:
2181: case 4:
1.220 millert 2182: fwd->listen_host = xstrdup(fwdargs[0].arg);
2183: fwd->listen_port = a2port(fwdargs[1].arg);
2184: fwd->connect_host = xstrdup(fwdargs[2].arg);
2185: fwd->connect_port = a2port(fwdargs[3].arg);
1.135 djm 2186: break;
2187: default:
2188: i = 0; /* failure */
2189: }
2190:
1.202 djm 2191: free(p);
1.135 djm 2192:
1.168 stevesk 2193: if (dynamicfwd) {
2194: if (!(i == 1 || i == 2))
2195: goto fail_free;
2196: } else {
1.220 millert 2197: if (!(i == 3 || i == 4)) {
2198: if (fwd->connect_path == NULL &&
2199: fwd->listen_path == NULL)
2200: goto fail_free;
2201: }
2202: if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.168 stevesk 2203: goto fail_free;
2204: }
2205:
1.220 millert 2206: if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
2207: (!remotefwd && fwd->listen_port == 0))
1.135 djm 2208: goto fail_free;
2209: if (fwd->connect_host != NULL &&
2210: strlen(fwd->connect_host) >= NI_MAXHOST)
2211: goto fail_free;
1.220 millert 2212: /* XXX - if connecting to a remote socket, max sun len may not match this host */
2213: if (fwd->connect_path != NULL &&
2214: strlen(fwd->connect_path) >= PATH_MAX_SUN)
2215: goto fail_free;
1.176 djm 2216: if (fwd->listen_host != NULL &&
2217: strlen(fwd->listen_host) >= NI_MAXHOST)
2218: goto fail_free;
1.220 millert 2219: if (fwd->listen_path != NULL &&
2220: strlen(fwd->listen_path) >= PATH_MAX_SUN)
2221: goto fail_free;
1.135 djm 2222:
2223: return (i);
2224:
2225: fail_free:
1.202 djm 2226: free(fwd->connect_host);
2227: fwd->connect_host = NULL;
1.220 millert 2228: free(fwd->connect_path);
2229: fwd->connect_path = NULL;
1.202 djm 2230: free(fwd->listen_host);
2231: fwd->listen_host = NULL;
1.220 millert 2232: free(fwd->listen_path);
2233: fwd->listen_path = NULL;
1.135 djm 2234: return (0);
1.221 djm 2235: }
2236:
1.257 djm 2237: int
2238: parse_jump(const char *s, Options *o, int active)
2239: {
2240: char *orig, *sdup, *cp;
2241: char *host = NULL, *user = NULL;
1.258 naddy 2242: int ret = -1, port = -1, first;
1.257 djm 2243:
2244: active &= o->proxy_command == NULL && o->jump_host == NULL;
2245:
2246: orig = sdup = xstrdup(s);
1.258 naddy 2247: first = active;
1.259 djm 2248: do {
2249: if ((cp = strrchr(sdup, ',')) == NULL)
2250: cp = sdup; /* last */
2251: else
2252: *cp++ = '\0';
2253:
1.258 naddy 2254: if (first) {
1.257 djm 2255: /* First argument and configuration is active */
1.280 ! millert 2256: if (parse_ssh_uri(cp, &user, &host, &port) == -1 ||
! 2257: parse_user_host_port(cp, &user, &host, &port) != 0)
1.257 djm 2258: goto out;
2259: } else {
2260: /* Subsequent argument or inactive configuration */
1.280 ! millert 2261: if (parse_ssh_uri(cp, NULL, NULL, NULL) == -1 ||
! 2262: parse_user_host_port(cp, NULL, NULL, NULL) != 0)
1.257 djm 2263: goto out;
2264: }
1.258 naddy 2265: first = 0; /* only check syntax for subsequent hosts */
1.259 djm 2266: } while (cp != sdup);
1.257 djm 2267: /* success */
1.258 naddy 2268: if (active) {
2269: o->jump_user = user;
2270: o->jump_host = host;
2271: o->jump_port = port;
2272: o->proxy_command = xstrdup("none");
2273: user = host = NULL;
1.259 djm 2274: if ((cp = strrchr(s, ',')) != NULL && cp != s) {
2275: o->jump_extra = xstrdup(s);
2276: o->jump_extra[cp - s] = '\0';
2277: }
1.258 naddy 2278: }
1.257 djm 2279: ret = 0;
2280: out:
1.258 naddy 2281: free(orig);
1.257 djm 2282: free(user);
2283: free(host);
2284: return ret;
1.280 ! millert 2285: }
! 2286:
! 2287: int
! 2288: parse_ssh_uri(const char *uri, char **userp, char **hostp, int *portp)
! 2289: {
! 2290: char *path;
! 2291: int r;
! 2292:
! 2293: r = parse_uri("ssh", uri, userp, hostp, portp, &path);
! 2294: if (r == 0 && path != NULL)
! 2295: r = -1; /* path not allowed */
! 2296: return r;
1.257 djm 2297: }
2298:
1.221 djm 2299: /* XXX the following is a near-vebatim copy from servconf.c; refactor */
2300: static const char *
2301: fmt_multistate_int(int val, const struct multistate *m)
2302: {
2303: u_int i;
2304:
2305: for (i = 0; m[i].key != NULL; i++) {
2306: if (m[i].value == val)
2307: return m[i].key;
2308: }
2309: return "UNKNOWN";
2310: }
2311:
2312: static const char *
2313: fmt_intarg(OpCodes code, int val)
2314: {
2315: if (val == -1)
2316: return "unset";
2317: switch (code) {
2318: case oAddressFamily:
2319: return fmt_multistate_int(val, multistate_addressfamily);
2320: case oVerifyHostKeyDNS:
1.232 djm 2321: case oUpdateHostkeys:
1.221 djm 2322: return fmt_multistate_int(val, multistate_yesnoask);
1.278 djm 2323: case oStrictHostKeyChecking:
2324: return fmt_multistate_int(val, multistate_strict_hostkey);
1.221 djm 2325: case oControlMaster:
2326: return fmt_multistate_int(val, multistate_controlmaster);
2327: case oTunnel:
2328: return fmt_multistate_int(val, multistate_tunnel);
2329: case oRequestTTY:
2330: return fmt_multistate_int(val, multistate_requesttty);
2331: case oCanonicalizeHostname:
2332: return fmt_multistate_int(val, multistate_canonicalizehostname);
1.224 djm 2333: case oFingerprintHash:
2334: return ssh_digest_alg_name(val);
1.221 djm 2335: default:
2336: switch (val) {
2337: case 0:
2338: return "no";
2339: case 1:
2340: return "yes";
2341: default:
2342: return "UNKNOWN";
2343: }
2344: }
2345: }
2346:
2347: static const char *
2348: lookup_opcode_name(OpCodes code)
2349: {
2350: u_int i;
2351:
2352: for (i = 0; keywords[i].name != NULL; i++)
2353: if (keywords[i].opcode == code)
2354: return(keywords[i].name);
2355: return "UNKNOWN";
2356: }
2357:
2358: static void
2359: dump_cfg_int(OpCodes code, int val)
2360: {
2361: printf("%s %d\n", lookup_opcode_name(code), val);
2362: }
2363:
2364: static void
2365: dump_cfg_fmtint(OpCodes code, int val)
2366: {
2367: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2368: }
2369:
2370: static void
2371: dump_cfg_string(OpCodes code, const char *val)
2372: {
2373: if (val == NULL)
2374: return;
2375: printf("%s %s\n", lookup_opcode_name(code), val);
2376: }
2377:
2378: static void
2379: dump_cfg_strarray(OpCodes code, u_int count, char **vals)
2380: {
2381: u_int i;
2382:
2383: for (i = 0; i < count; i++)
2384: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2385: }
2386:
2387: static void
2388: dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
2389: {
2390: u_int i;
2391:
2392: printf("%s", lookup_opcode_name(code));
2393: for (i = 0; i < count; i++)
2394: printf(" %s", vals[i]);
2395: printf("\n");
2396: }
2397:
2398: static void
2399: dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
2400: {
2401: const struct Forward *fwd;
2402: u_int i;
2403:
2404: /* oDynamicForward */
2405: for (i = 0; i < count; i++) {
2406: fwd = &fwds[i];
1.265 djm 2407: if (code == oDynamicForward && fwd->connect_host != NULL &&
1.221 djm 2408: strcmp(fwd->connect_host, "socks") != 0)
2409: continue;
1.265 djm 2410: if (code == oLocalForward && fwd->connect_host != NULL &&
1.221 djm 2411: strcmp(fwd->connect_host, "socks") == 0)
2412: continue;
2413: printf("%s", lookup_opcode_name(code));
2414: if (fwd->listen_port == PORT_STREAMLOCAL)
2415: printf(" %s", fwd->listen_path);
2416: else if (fwd->listen_host == NULL)
2417: printf(" %d", fwd->listen_port);
2418: else {
2419: printf(" [%s]:%d",
2420: fwd->listen_host, fwd->listen_port);
2421: }
2422: if (code != oDynamicForward) {
2423: if (fwd->connect_port == PORT_STREAMLOCAL)
2424: printf(" %s", fwd->connect_path);
2425: else if (fwd->connect_host == NULL)
2426: printf(" %d", fwd->connect_port);
2427: else {
2428: printf(" [%s]:%d",
2429: fwd->connect_host, fwd->connect_port);
2430: }
2431: }
2432: printf("\n");
2433: }
2434: }
2435:
2436: void
2437: dump_client_config(Options *o, const char *host)
2438: {
2439: int i;
1.257 djm 2440: char buf[8];
1.221 djm 2441:
1.240 djm 2442: /* This is normally prepared in ssh_kex2 */
2443: if (kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->hostkeyalgorithms) != 0)
2444: fatal("%s: kex_assemble_names failed", __func__);
2445:
1.221 djm 2446: /* Most interesting options first: user, host, port */
2447: dump_cfg_string(oUser, o->user);
2448: dump_cfg_string(oHostName, host);
2449: dump_cfg_int(oPort, o->port);
2450:
2451: /* Flag options */
2452: dump_cfg_fmtint(oAddressFamily, o->address_family);
2453: dump_cfg_fmtint(oBatchMode, o->batch_mode);
2454: dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
2455: dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
2456: dump_cfg_fmtint(oChallengeResponseAuthentication, o->challenge_response_authentication);
2457: dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
2458: dump_cfg_fmtint(oCompression, o->compression);
2459: dump_cfg_fmtint(oControlMaster, o->control_master);
2460: dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
1.256 dtucker 2461: dump_cfg_fmtint(oClearAllForwardings, o->clear_forwardings);
1.221 djm 2462: dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
1.224 djm 2463: dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
1.221 djm 2464: dump_cfg_fmtint(oForwardAgent, o->forward_agent);
2465: dump_cfg_fmtint(oForwardX11, o->forward_x11);
2466: dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
2467: dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
2468: #ifdef GSSAPI
2469: dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
2470: dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
2471: #endif /* GSSAPI */
2472: dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
2473: dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
2474: dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
2475: dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
2476: dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
2477: dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
2478: dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
2479: dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
2480: dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
2481: dump_cfg_fmtint(oRequestTTY, o->request_tty);
2482: dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
2483: dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
2484: dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
2485: dump_cfg_fmtint(oTunnel, o->tun_open);
2486: dump_cfg_fmtint(oUsePrivilegedPort, o->use_privileged_port);
2487: dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
2488: dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
1.229 djm 2489: dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
1.221 djm 2490:
2491: /* Integer options */
2492: dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
2493: dump_cfg_int(oConnectionAttempts, o->connection_attempts);
2494: dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
2495: dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
2496: dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
2497: dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
2498:
2499: /* String options */
2500: dump_cfg_string(oBindAddress, o->bind_address);
2501: dump_cfg_string(oCiphers, o->ciphers ? o->ciphers : KEX_CLIENT_ENCRYPT);
2502: dump_cfg_string(oControlPath, o->control_path);
1.240 djm 2503: dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
1.221 djm 2504: dump_cfg_string(oHostKeyAlias, o->host_key_alias);
1.230 djm 2505: dump_cfg_string(oHostbasedKeyTypes, o->hostbased_key_types);
1.253 markus 2506: dump_cfg_string(oIdentityAgent, o->identity_agent);
1.221 djm 2507: dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
2508: dump_cfg_string(oKexAlgorithms, o->kex_algorithms ? o->kex_algorithms : KEX_CLIENT_KEX);
2509: dump_cfg_string(oLocalCommand, o->local_command);
1.277 bluhm 2510: dump_cfg_string(oRemoteCommand, o->remote_command);
1.221 djm 2511: dump_cfg_string(oLogLevel, log_level_name(o->log_level));
2512: dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC);
1.266 djm 2513: #ifdef ENABLE_PKCS11
1.221 djm 2514: dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
1.266 djm 2515: #endif
1.221 djm 2516: dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
1.242 djm 2517: dump_cfg_string(oPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.230 djm 2518: dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
1.221 djm 2519: dump_cfg_string(oXAuthLocation, o->xauth_location);
2520:
1.230 djm 2521: /* Forwards */
1.221 djm 2522: dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
2523: dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
2524: dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
2525:
2526: /* String array options */
2527: dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
2528: dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
2529: dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
2530: dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
2531: dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
2532:
2533: /* Special cases */
2534:
2535: /* oConnectTimeout */
2536: if (o->connection_timeout == -1)
2537: printf("connecttimeout none\n");
2538: else
2539: dump_cfg_int(oConnectTimeout, o->connection_timeout);
2540:
2541: /* oTunnelDevice */
2542: printf("tunneldevice");
2543: if (o->tun_local == SSH_TUNID_ANY)
2544: printf(" any");
2545: else
2546: printf(" %d", o->tun_local);
2547: if (o->tun_remote == SSH_TUNID_ANY)
2548: printf(":any");
2549: else
2550: printf(":%d", o->tun_remote);
2551: printf("\n");
2552:
2553: /* oCanonicalizePermittedCNAMEs */
2554: if ( o->num_permitted_cnames > 0) {
2555: printf("canonicalizePermittedcnames");
2556: for (i = 0; i < o->num_permitted_cnames; i++) {
2557: printf(" %s:%s", o->permitted_cnames[i].source_list,
2558: o->permitted_cnames[i].target_list);
2559: }
2560: printf("\n");
2561: }
2562:
2563: /* oControlPersist */
2564: if (o->control_persist == 0 || o->control_persist_timeout == 0)
2565: dump_cfg_fmtint(oControlPersist, o->control_persist);
2566: else
2567: dump_cfg_int(oControlPersist, o->control_persist_timeout);
2568:
2569: /* oEscapeChar */
2570: if (o->escape_char == SSH_ESCAPECHAR_NONE)
2571: printf("escapechar none\n");
2572: else {
1.257 djm 2573: vis(buf, o->escape_char, VIS_WHITE, 0);
2574: printf("escapechar %s\n", buf);
1.221 djm 2575: }
2576:
2577: /* oIPQoS */
2578: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2579: printf("%s\n", iptos2str(o->ip_qos_bulk));
2580:
2581: /* oRekeyLimit */
1.249 dtucker 2582: printf("rekeylimit %llu %d\n",
2583: (unsigned long long)o->rekey_limit, o->rekey_interval);
1.221 djm 2584:
2585: /* oStreamLocalBindMask */
2586: printf("streamlocalbindmask 0%o\n",
2587: o->fwd_opts.streamlocal_bind_mask);
1.257 djm 2588:
2589: /* oProxyCommand / oProxyJump */
2590: if (o->jump_host == NULL)
2591: dump_cfg_string(oProxyCommand, o->proxy_command);
2592: else {
2593: /* Check for numeric addresses */
2594: i = strchr(o->jump_host, ':') != NULL ||
2595: strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
2596: snprintf(buf, sizeof(buf), "%d", o->jump_port);
2597: printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
1.259 djm 2598: /* optional additional jump spec */
2599: o->jump_extra == NULL ? "" : o->jump_extra,
2600: o->jump_extra == NULL ? "" : ",",
1.257 djm 2601: /* optional user */
2602: o->jump_user == NULL ? "" : o->jump_user,
2603: o->jump_user == NULL ? "" : "@",
2604: /* opening [ if hostname is numeric */
2605: i ? "[" : "",
2606: /* mandatory hostname */
2607: o->jump_host,
2608: /* closing ] if hostname is numeric */
2609: i ? "]" : "",
2610: /* optional port number */
2611: o->jump_port <= 0 ? "" : ":",
1.259 djm 2612: o->jump_port <= 0 ? "" : buf);
1.257 djm 2613: }
1.1 deraadt 2614: }
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