Annotation of src/usr.bin/ssh/readconf.c, Revision 1.287
1.287 ! djm 1: /* $OpenBSD: readconf.c,v 1.286 2018/04/06 13:02:39 djm Exp $ */
1.1 deraadt 2: /*
1.18 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Functions for reading the configuration files.
1.26 markus 7: *
1.46 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 13: */
1.1 deraadt 14:
1.147 stevesk 15: #include <sys/types.h>
16: #include <sys/stat.h>
1.152 stevesk 17: #include <sys/socket.h>
1.206 djm 18: #include <sys/wait.h>
1.220 millert 19: #include <sys/un.h>
1.152 stevesk 20:
21: #include <netinet/in.h>
1.190 djm 22: #include <netinet/ip.h>
1.148 stevesk 23:
24: #include <ctype.h>
1.154 stevesk 25: #include <errno.h>
1.206 djm 26: #include <fcntl.h>
1.252 djm 27: #include <glob.h>
1.155 stevesk 28: #include <netdb.h>
1.206 djm 29: #include <paths.h>
30: #include <pwd.h>
1.159 deraadt 31: #include <signal.h>
1.158 stevesk 32: #include <stdio.h>
1.157 stevesk 33: #include <string.h>
1.156 stevesk 34: #include <unistd.h>
1.228 deraadt 35: #include <limits.h>
1.200 dtucker 36: #include <util.h>
1.221 djm 37: #include <vis.h>
1.1 deraadt 38:
1.159 deraadt 39: #include "xmalloc.h"
1.1 deraadt 40: #include "ssh.h"
1.25 markus 41: #include "compat.h"
1.58 markus 42: #include "cipher.h"
1.55 markus 43: #include "pathnames.h"
1.58 markus 44: #include "log.h"
1.227 djm 45: #include "sshkey.h"
1.220 millert 46: #include "misc.h"
1.58 markus 47: #include "readconf.h"
48: #include "match.h"
1.62 markus 49: #include "kex.h"
50: #include "mac.h"
1.206 djm 51: #include "uidswap.h"
1.221 djm 52: #include "myproposal.h"
1.224 djm 53: #include "digest.h"
1.1 deraadt 54:
55: /* Format of the configuration file:
56:
57: # Configuration data is parsed as follows:
58: # 1. command line options
59: # 2. user-specific file
60: # 3. system-wide file
61: # Any configuration value is only changed the first time it is set.
62: # Thus, host-specific definitions should be at the beginning of the
63: # configuration file, and defaults at the end.
64:
65: # Host-specific declarations. These may override anything above. A single
66: # host may match multiple declarations; these are processed in the order
67: # that they are given in.
68:
69: Host *.ngs.fi ngs.fi
1.96 markus 70: User foo
1.1 deraadt 71:
72: Host fake.com
73: HostName another.host.name.real.org
74: User blaah
75: Port 34289
76: ForwardX11 no
77: ForwardAgent no
78:
79: Host books.com
80: RemoteForward 9999 shadows.cs.hut.fi:9999
1.266 djm 81: Ciphers 3des-cbc
1.1 deraadt 82:
83: Host fascist.blob.com
84: Port 23123
85: User tylonen
86: PasswordAuthentication no
87:
88: Host puukko.hut.fi
89: User t35124p
90: ProxyCommand ssh-proxy %h %p
91:
92: Host *.fr
1.96 markus 93: PublicKeyAuthentication no
1.1 deraadt 94:
95: Host *.su
1.266 djm 96: Ciphers aes128-ctr
1.1 deraadt 97: PasswordAuthentication no
98:
1.144 reyk 99: Host vpn.fake.com
100: Tunnel yes
101: TunnelDevice 3
102:
1.1 deraadt 103: # Defaults for various options
104: Host *
105: ForwardAgent no
1.50 markus 106: ForwardX11 no
1.1 deraadt 107: PasswordAuthentication yes
108: RSAAuthentication yes
109: RhostsRSAAuthentication yes
110: StrictHostKeyChecking yes
1.126 markus 111: TcpKeepAlive no
1.1 deraadt 112: IdentityFile ~/.ssh/identity
113: Port 22
114: EscapeChar ~
115:
116: */
117:
1.252 djm 118: static int read_config_file_depth(const char *filename, struct passwd *pw,
119: const char *host, const char *original_host, Options *options,
120: int flags, int *activep, int depth);
121: static int process_config_line_depth(Options *options, struct passwd *pw,
122: const char *host, const char *original_host, char *line,
123: const char *filename, int linenum, int *activep, int flags, int depth);
124:
1.1 deraadt 125: /* Keyword tokens. */
126:
1.17 markus 127: typedef enum {
128: oBadOption,
1.252 djm 129: oHost, oMatch, oInclude,
1.186 djm 130: oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
131: oGatewayPorts, oExitOnForwardFailure,
1.100 deraadt 132: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 133: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 134: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
1.253 markus 135: oCertificateFile, oAddKeysToAgent, oIdentityAgent,
1.206 djm 136: oUser, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
1.17 markus 137: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
138: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 139: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.273 djm 140: oUsePrivilegedPort, oLogFacility, oLogLevel, oCiphers, oMacs,
1.221 djm 141: oPubkeyAuthentication,
1.67 markus 142: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 143: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.282 djm 144: oHostKeyAlgorithms, oBindAddress, oBindInterface, 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 },
1.282 djm 254: { "bindinterface", oBindInterface },
1.93 deraadt 255: { "clearallforwardings", oClearAllForwardings },
1.101 markus 256: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 257: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 258: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 259: { "rekeylimit", oRekeyLimit },
1.111 djm 260: { "connecttimeout", oConnectTimeout },
1.112 djm 261: { "addressfamily", oAddressFamily },
1.127 markus 262: { "serveraliveinterval", oServerAliveInterval },
263: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 264: { "sendenv", oSendEnv },
1.132 djm 265: { "controlpath", oControlPath },
266: { "controlmaster", oControlMaster },
1.187 djm 267: { "controlpersist", oControlPersist },
1.136 djm 268: { "hashknownhosts", oHashKnownHosts },
1.252 djm 269: { "include", oInclude },
1.144 reyk 270: { "tunnel", oTunnel },
271: { "tunneldevice", oTunnelDevice },
272: { "localcommand", oLocalCommand },
273: { "permitlocalcommand", oPermitLocalCommand },
1.277 bluhm 274: { "remotecommand", oRemoteCommand },
1.167 grunk 275: { "visualhostkey", oVisualHostKey },
1.189 djm 276: { "kexalgorithms", oKexAlgorithms },
1.190 djm 277: { "ipqos", oIPQoS },
1.192 djm 278: { "requesttty", oRequestTTY },
1.205 djm 279: { "proxyusefdpass", oProxyUseFdpass },
1.208 djm 280: { "canonicaldomains", oCanonicalDomains },
1.209 djm 281: { "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
282: { "canonicalizehostname", oCanonicalizeHostname },
283: { "canonicalizemaxdots", oCanonicalizeMaxDots },
284: { "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
1.220 millert 285: { "streamlocalbindmask", oStreamLocalBindMask },
286: { "streamlocalbindunlink", oStreamLocalBindUnlink },
1.223 djm 287: { "revokedhostkeys", oRevokedHostKeys },
1.224 djm 288: { "fingerprinthash", oFingerprintHash },
1.229 djm 289: { "updatehostkeys", oUpdateHostkeys },
1.230 djm 290: { "hostbasedkeytypes", oHostbasedKeyTypes },
1.238 markus 291: { "pubkeyacceptedkeytypes", oPubkeyAcceptedKeyTypes },
1.199 djm 292: { "ignoreunknown", oIgnoreUnknown },
1.257 djm 293: { "proxyjump", oProxyJump },
1.171 djm 294:
1.92 stevesk 295: { NULL, oBadOption }
1.13 markus 296: };
297:
1.19 markus 298: /*
299: * Adds a local TCP/IP port forward to options. Never returns if there is an
300: * error.
301: */
1.1 deraadt 302:
1.26 markus 303: void
1.220 millert 304: add_local_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 305: {
1.220 millert 306: struct Forward *fwd;
1.17 markus 307: extern uid_t original_real_uid;
1.251 djm 308: int i;
1.185 djm 309:
1.262 jsg 310: if (!bind_permitted(newfwd->listen_port, original_real_uid) &&
1.220 millert 311: newfwd->listen_path == NULL)
1.64 millert 312: fatal("Privileged ports can only be forwarded by root.");
1.251 djm 313: /* Don't add duplicates */
314: for (i = 0; i < options->num_local_forwards; i++) {
315: if (forward_equals(newfwd, options->local_forwards + i))
316: return;
317: }
1.234 deraadt 318: options->local_forwards = xreallocarray(options->local_forwards,
1.185 djm 319: options->num_local_forwards + 1,
320: sizeof(*options->local_forwards));
1.17 markus 321: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 322:
1.172 stevesk 323: fwd->listen_host = newfwd->listen_host;
1.135 djm 324: fwd->listen_port = newfwd->listen_port;
1.220 millert 325: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 326: fwd->connect_host = newfwd->connect_host;
1.135 djm 327: fwd->connect_port = newfwd->connect_port;
1.220 millert 328: fwd->connect_path = newfwd->connect_path;
1.1 deraadt 329: }
330:
1.19 markus 331: /*
332: * Adds a remote TCP/IP port forward to options. Never returns if there is
333: * an error.
334: */
1.1 deraadt 335:
1.26 markus 336: void
1.220 millert 337: add_remote_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 338: {
1.220 millert 339: struct Forward *fwd;
1.251 djm 340: int i;
1.185 djm 341:
1.251 djm 342: /* Don't add duplicates */
343: for (i = 0; i < options->num_remote_forwards; i++) {
344: if (forward_equals(newfwd, options->remote_forwards + i))
345: return;
346: }
1.234 deraadt 347: options->remote_forwards = xreallocarray(options->remote_forwards,
1.185 djm 348: options->num_remote_forwards + 1,
349: sizeof(*options->remote_forwards));
1.17 markus 350: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 351:
1.172 stevesk 352: fwd->listen_host = newfwd->listen_host;
1.135 djm 353: fwd->listen_port = newfwd->listen_port;
1.220 millert 354: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 355: fwd->connect_host = newfwd->connect_host;
1.135 djm 356: fwd->connect_port = newfwd->connect_port;
1.220 millert 357: fwd->connect_path = newfwd->connect_path;
1.194 markus 358: fwd->handle = newfwd->handle;
1.184 markus 359: fwd->allocated_port = 0;
1.1 deraadt 360: }
361:
1.90 stevesk 362: static void
363: clear_forwardings(Options *options)
364: {
365: int i;
366:
1.135 djm 367: for (i = 0; i < options->num_local_forwards; i++) {
1.202 djm 368: free(options->local_forwards[i].listen_host);
1.220 millert 369: free(options->local_forwards[i].listen_path);
1.202 djm 370: free(options->local_forwards[i].connect_host);
1.220 millert 371: free(options->local_forwards[i].connect_path);
1.135 djm 372: }
1.185 djm 373: if (options->num_local_forwards > 0) {
1.202 djm 374: free(options->local_forwards);
1.185 djm 375: options->local_forwards = NULL;
376: }
1.90 stevesk 377: options->num_local_forwards = 0;
1.135 djm 378: for (i = 0; i < options->num_remote_forwards; i++) {
1.202 djm 379: free(options->remote_forwards[i].listen_host);
1.220 millert 380: free(options->remote_forwards[i].listen_path);
1.202 djm 381: free(options->remote_forwards[i].connect_host);
1.220 millert 382: free(options->remote_forwards[i].connect_path);
1.135 djm 383: }
1.185 djm 384: if (options->num_remote_forwards > 0) {
1.202 djm 385: free(options->remote_forwards);
1.185 djm 386: options->remote_forwards = NULL;
387: }
1.90 stevesk 388: options->num_remote_forwards = 0;
1.145 reyk 389: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 390: }
391:
1.195 dtucker 392: void
1.241 djm 393: add_certificate_file(Options *options, const char *path, int userprovided)
394: {
395: int i;
396:
397: if (options->num_certificate_files >= SSH_MAX_CERTIFICATE_FILES)
398: fatal("Too many certificate files specified (max %d)",
399: SSH_MAX_CERTIFICATE_FILES);
400:
401: /* Avoid registering duplicates */
402: for (i = 0; i < options->num_certificate_files; i++) {
403: if (options->certificate_file_userprovided[i] == userprovided &&
404: strcmp(options->certificate_files[i], path) == 0) {
405: debug2("%s: ignoring duplicate key %s", __func__, path);
406: return;
407: }
408: }
409:
410: options->certificate_file_userprovided[options->num_certificate_files] =
411: userprovided;
412: options->certificate_files[options->num_certificate_files++] =
413: xstrdup(path);
414: }
415:
416: void
1.195 dtucker 417: add_identity_file(Options *options, const char *dir, const char *filename,
418: int userprovided)
419: {
420: char *path;
1.219 djm 421: int i;
1.195 dtucker 422:
423: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
424: fatal("Too many identity files specified (max %d)",
425: SSH_MAX_IDENTITY_FILES);
426:
427: if (dir == NULL) /* no dir, filename is absolute */
428: path = xstrdup(filename);
1.276 djm 429: else if (xasprintf(&path, "%s%s", dir, filename) >= PATH_MAX)
430: fatal("Identity file path %s too long", path);
1.219 djm 431:
432: /* Avoid registering duplicates */
433: for (i = 0; i < options->num_identity_files; i++) {
434: if (options->identity_file_userprovided[i] == userprovided &&
435: strcmp(options->identity_files[i], path) == 0) {
436: debug2("%s: ignoring duplicate key %s", __func__, path);
437: free(path);
438: return;
439: }
440: }
1.195 dtucker 441:
442: options->identity_file_userprovided[options->num_identity_files] =
443: userprovided;
444: options->identity_files[options->num_identity_files++] = path;
445: }
446:
1.206 djm 447: int
448: default_ssh_port(void)
449: {
450: static int port;
451: struct servent *sp;
452:
453: if (port == 0) {
454: sp = getservbyname(SSH_SERVICE_NAME, "tcp");
455: port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
456: }
457: return port;
458: }
459:
460: /*
461: * Execute a command in a shell.
462: * Return its exit status or -1 on abnormal exit.
463: */
464: static int
465: execute_in_shell(const char *cmd)
466: {
1.243 dtucker 467: char *shell;
1.206 djm 468: pid_t pid;
469: int devnull, status;
470: extern uid_t original_real_uid;
471:
472: if ((shell = getenv("SHELL")) == NULL)
473: shell = _PATH_BSHELL;
474:
475: /* Need this to redirect subprocess stdin/out */
476: if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
477: fatal("open(/dev/null): %s", strerror(errno));
478:
479: debug("Executing command: '%.500s'", cmd);
480:
481: /* Fork and execute the command. */
482: if ((pid = fork()) == 0) {
1.245 djm 483: char *argv[4];
1.206 djm 484:
485: /* Child. Permanently give up superuser privileges. */
486: permanently_drop_suid(original_real_uid);
487:
488: /* Redirect child stdin and stdout. Leave stderr */
489: if (dup2(devnull, STDIN_FILENO) == -1)
490: fatal("dup2: %s", strerror(errno));
491: if (dup2(devnull, STDOUT_FILENO) == -1)
492: fatal("dup2: %s", strerror(errno));
493: if (devnull > STDERR_FILENO)
494: close(devnull);
495: closefrom(STDERR_FILENO + 1);
1.245 djm 496:
497: argv[0] = shell;
498: argv[1] = "-c";
499: argv[2] = xstrdup(cmd);
500: argv[3] = NULL;
1.206 djm 501:
502: execv(argv[0], argv);
503: error("Unable to execute '%.100s': %s", cmd, strerror(errno));
504: /* Die with signal to make this error apparent to parent. */
505: signal(SIGTERM, SIG_DFL);
506: kill(getpid(), SIGTERM);
507: _exit(1);
508: }
509: /* Parent. */
510: if (pid < 0)
511: fatal("%s: fork: %.100s", __func__, strerror(errno));
512:
513: close(devnull);
514:
515: while (waitpid(pid, &status, 0) == -1) {
516: if (errno != EINTR && errno != EAGAIN)
517: fatal("%s: waitpid: %s", __func__, strerror(errno));
518: }
519: if (!WIFEXITED(status)) {
520: error("command '%.100s' exited abnormally", cmd);
521: return -1;
1.221 djm 522: }
1.206 djm 523: debug3("command returned status %d", WEXITSTATUS(status));
524: return WEXITSTATUS(status);
525: }
526:
527: /*
528: * Parse and execute a Match directive.
529: */
530: static int
531: match_cfg_line(Options *options, char **condition, struct passwd *pw,
1.221 djm 532: const char *host_arg, const char *original_host, int post_canon,
533: const char *filename, int linenum)
1.206 djm 534: {
1.221 djm 535: char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria;
1.211 djm 536: const char *ruser;
1.221 djm 537: int r, port, this_result, result = 1, attributes = 0, negate;
1.206 djm 538: char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
539:
540: /*
541: * Configuration is likely to be incomplete at this point so we
542: * must be prepared to use default values.
543: */
544: port = options->port <= 0 ? default_ssh_port() : options->port;
545: ruser = options->user == NULL ? pw->pw_name : options->user;
1.250 djm 546: if (post_canon) {
547: host = xstrdup(options->hostname);
548: } else if (options->hostname != NULL) {
1.212 djm 549: /* NB. Please keep in sync with ssh.c:main() */
1.211 djm 550: host = percent_expand(options->hostname,
551: "h", host_arg, (char *)NULL);
1.250 djm 552: } else {
1.211 djm 553: host = xstrdup(host_arg);
1.250 djm 554: }
1.206 djm 555:
1.221 djm 556: debug2("checking match for '%s' host %s originally %s",
557: cp, host, original_host);
558: while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') {
559: criteria = NULL;
560: this_result = 1;
561: if ((negate = attrib[0] == '!'))
562: attrib++;
563: /* criteria "all" and "canonical" have no argument */
1.213 dtucker 564: if (strcasecmp(attrib, "all") == 0) {
1.221 djm 565: if (attributes > 1 ||
1.213 dtucker 566: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
1.221 djm 567: error("%.200s line %d: '%s' cannot be combined "
568: "with other Match attributes",
569: filename, linenum, oattrib);
1.213 dtucker 570: result = -1;
571: goto out;
572: }
1.221 djm 573: if (result)
574: result = negate ? 0 : 1;
1.213 dtucker 575: goto out;
576: }
1.221 djm 577: attributes++;
578: if (strcasecmp(attrib, "canonical") == 0) {
579: r = !!post_canon; /* force bitmask member to boolean */
580: if (r == (negate ? 1 : 0))
581: this_result = result = 0;
582: debug3("%.200s line %d: %smatched '%s'",
583: filename, linenum,
584: this_result ? "" : "not ", oattrib);
585: continue;
586: }
587: /* All other criteria require an argument */
1.206 djm 588: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
589: error("Missing Match criteria for %s", attrib);
1.211 djm 590: result = -1;
591: goto out;
1.206 djm 592: }
593: if (strcasecmp(attrib, "host") == 0) {
1.221 djm 594: criteria = xstrdup(host);
1.235 djm 595: r = match_hostname(host, arg) == 1;
1.221 djm 596: if (r == (negate ? 1 : 0))
597: this_result = result = 0;
1.206 djm 598: } else if (strcasecmp(attrib, "originalhost") == 0) {
1.221 djm 599: criteria = xstrdup(original_host);
1.235 djm 600: r = match_hostname(original_host, arg) == 1;
1.221 djm 601: if (r == (negate ? 1 : 0))
602: this_result = result = 0;
1.206 djm 603: } else if (strcasecmp(attrib, "user") == 0) {
1.221 djm 604: criteria = xstrdup(ruser);
1.235 djm 605: r = match_pattern_list(ruser, arg, 0) == 1;
1.221 djm 606: if (r == (negate ? 1 : 0))
607: this_result = result = 0;
1.206 djm 608: } else if (strcasecmp(attrib, "localuser") == 0) {
1.221 djm 609: criteria = xstrdup(pw->pw_name);
1.235 djm 610: r = match_pattern_list(pw->pw_name, arg, 0) == 1;
1.221 djm 611: if (r == (negate ? 1 : 0))
612: this_result = result = 0;
1.210 djm 613: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 614: if (gethostname(thishost, sizeof(thishost)) == -1)
615: fatal("gethostname: %s", strerror(errno));
616: strlcpy(shorthost, thishost, sizeof(shorthost));
617: shorthost[strcspn(thishost, ".")] = '\0';
618: snprintf(portstr, sizeof(portstr), "%d", port);
619:
620: cmd = percent_expand(arg,
621: "L", shorthost,
622: "d", pw->pw_dir,
623: "h", host,
624: "l", thishost,
1.221 djm 625: "n", original_host,
1.206 djm 626: "p", portstr,
627: "r", ruser,
628: "u", pw->pw_name,
629: (char *)NULL);
1.217 djm 630: if (result != 1) {
631: /* skip execution if prior predicate failed */
1.221 djm 632: debug3("%.200s line %d: skipped exec "
633: "\"%.100s\"", filename, linenum, cmd);
634: free(cmd);
635: continue;
636: }
637: r = execute_in_shell(cmd);
638: if (r == -1) {
639: fatal("%.200s line %d: match exec "
640: "'%.100s' error", filename,
641: linenum, cmd);
1.217 djm 642: }
1.221 djm 643: criteria = xstrdup(cmd);
1.206 djm 644: free(cmd);
1.221 djm 645: /* Force exit status to boolean */
646: r = r == 0;
647: if (r == (negate ? 1 : 0))
648: this_result = result = 0;
1.206 djm 649: } else {
650: error("Unsupported Match attribute %s", attrib);
1.211 djm 651: result = -1;
652: goto out;
1.206 djm 653: }
1.221 djm 654: debug3("%.200s line %d: %smatched '%s \"%.100s\"' ",
655: filename, linenum, this_result ? "": "not ",
656: oattrib, criteria);
657: free(criteria);
1.213 dtucker 658: }
659: if (attributes == 0) {
660: error("One or more attributes required for Match");
661: result = -1;
662: goto out;
1.206 djm 663: }
1.221 djm 664: out:
665: if (result != -1)
666: debug2("match %sfound", result ? "" : "not ");
1.206 djm 667: *condition = cp;
1.211 djm 668: free(host);
1.206 djm 669: return result;
670: }
671:
1.286 djm 672: /* Remove environment variable by pattern */
673: static void
674: rm_env(Options *options, const char *arg, const char *filename, int linenum)
675: {
676: int i, j;
677: char *cp;
678:
679: /* Remove an environment variable */
680: for (i = 0; i < options->num_send_env; ) {
681: cp = xstrdup(options->send_env[i]);
682: if (!match_pattern(cp, arg + 1)) {
683: free(cp);
684: i++;
685: continue;
686: }
687: debug3("%s line %d: removing environment %s",
688: filename, linenum, cp);
689: free(cp);
690: free(options->send_env[i]);
691: options->send_env[i] = NULL;
692: for (j = i; j < options->num_send_env - 1; j++) {
693: options->send_env[j] = options->send_env[j + 1];
694: options->send_env[j + 1] = NULL;
695: }
696: options->num_send_env--;
697: /* NB. don't increment i */
698: }
699: }
700:
1.19 markus 701: /*
1.70 stevesk 702: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 703: */
1.26 markus 704: static OpCodes
1.199 djm 705: parse_token(const char *cp, const char *filename, int linenum,
706: const char *ignored_unknown)
1.1 deraadt 707: {
1.199 djm 708: int i;
1.1 deraadt 709:
1.17 markus 710: for (i = 0; keywords[i].name; i++)
1.199 djm 711: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 712: return keywords[i].opcode;
1.235 djm 713: if (ignored_unknown != NULL &&
714: match_pattern_list(cp, ignored_unknown, 1) == 1)
1.199 djm 715: return oIgnoredUnknownOption;
1.75 stevesk 716: error("%s: line %d: Bad configuration option: %s",
717: filename, linenum, cp);
1.17 markus 718: return oBadOption;
1.1 deraadt 719: }
720:
1.207 djm 721: /* Multistate option parsing */
722: struct multistate {
723: char *key;
724: int value;
725: };
726: static const struct multistate multistate_flag[] = {
727: { "true", 1 },
728: { "false", 0 },
729: { "yes", 1 },
730: { "no", 0 },
731: { NULL, -1 }
732: };
733: static const struct multistate multistate_yesnoask[] = {
734: { "true", 1 },
735: { "false", 0 },
736: { "yes", 1 },
737: { "no", 0 },
738: { "ask", 2 },
739: { NULL, -1 }
740: };
1.278 djm 741: static const struct multistate multistate_strict_hostkey[] = {
742: { "true", SSH_STRICT_HOSTKEY_YES },
743: { "false", SSH_STRICT_HOSTKEY_OFF },
744: { "yes", SSH_STRICT_HOSTKEY_YES },
745: { "no", SSH_STRICT_HOSTKEY_OFF },
746: { "ask", SSH_STRICT_HOSTKEY_ASK },
747: { "off", SSH_STRICT_HOSTKEY_OFF },
748: { "accept-new", SSH_STRICT_HOSTKEY_NEW },
749: { NULL, -1 }
750: };
1.246 jcs 751: static const struct multistate multistate_yesnoaskconfirm[] = {
752: { "true", 1 },
753: { "false", 0 },
754: { "yes", 1 },
755: { "no", 0 },
756: { "ask", 2 },
757: { "confirm", 3 },
758: { NULL, -1 }
759: };
1.207 djm 760: static const struct multistate multistate_addressfamily[] = {
761: { "inet", AF_INET },
762: { "inet6", AF_INET6 },
763: { "any", AF_UNSPEC },
764: { NULL, -1 }
765: };
766: static const struct multistate multistate_controlmaster[] = {
767: { "true", SSHCTL_MASTER_YES },
768: { "yes", SSHCTL_MASTER_YES },
769: { "false", SSHCTL_MASTER_NO },
770: { "no", SSHCTL_MASTER_NO },
771: { "auto", SSHCTL_MASTER_AUTO },
772: { "ask", SSHCTL_MASTER_ASK },
773: { "autoask", SSHCTL_MASTER_AUTO_ASK },
774: { NULL, -1 }
775: };
776: static const struct multistate multistate_tunnel[] = {
777: { "ethernet", SSH_TUNMODE_ETHERNET },
778: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
779: { "true", SSH_TUNMODE_DEFAULT },
780: { "yes", SSH_TUNMODE_DEFAULT },
781: { "false", SSH_TUNMODE_NO },
782: { "no", SSH_TUNMODE_NO },
783: { NULL, -1 }
784: };
785: static const struct multistate multistate_requesttty[] = {
786: { "true", REQUEST_TTY_YES },
787: { "yes", REQUEST_TTY_YES },
788: { "false", REQUEST_TTY_NO },
789: { "no", REQUEST_TTY_NO },
790: { "force", REQUEST_TTY_FORCE },
791: { "auto", REQUEST_TTY_AUTO },
792: { NULL, -1 }
793: };
1.209 djm 794: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 795: { "true", SSH_CANONICALISE_YES },
796: { "false", SSH_CANONICALISE_NO },
797: { "yes", SSH_CANONICALISE_YES },
798: { "no", SSH_CANONICALISE_NO },
799: { "always", SSH_CANONICALISE_ALWAYS },
800: { NULL, -1 }
801: };
1.207 djm 802:
1.19 markus 803: /*
804: * Processes a single option line as used in the configuration files. This
805: * only sets those values that have not already been set.
806: */
1.14 markus 807: int
1.206 djm 808: process_config_line(Options *options, struct passwd *pw, const char *host,
1.221 djm 809: const char *original_host, char *line, const char *filename,
810: int linenum, int *activep, int flags)
1.1 deraadt 811: {
1.252 djm 812: return process_config_line_depth(options, pw, host, original_host,
813: line, filename, linenum, activep, flags, 0);
814: }
815:
816: #define WHITESPACE " \t\r\n"
817: static int
818: process_config_line_depth(Options *options, struct passwd *pw, const char *host,
819: const char *original_host, char *line, const char *filename,
820: int linenum, int *activep, int flags, int depth)
821: {
1.193 djm 822: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
823: char **cpptr, fwdarg[256];
1.199 djm 824: u_int i, *uintptr, max_entries = 0;
1.252 djm 825: int r, oactive, negated, opcode, *intptr, value, value2, cmdline = 0;
1.279 markus 826: int remotefwd, dynamicfwd;
1.164 dtucker 827: LogLevel *log_level_ptr;
1.271 dtucker 828: SyslogFacility *log_facility_ptr;
1.201 dtucker 829: long long val64;
1.102 markus 830: size_t len;
1.220 millert 831: struct Forward fwd;
1.207 djm 832: const struct multistate *multistate_ptr;
1.208 djm 833: struct allowed_cname *cname;
1.252 djm 834: glob_t gl;
1.281 dtucker 835: const char *errstr;
1.106 djm 836:
1.206 djm 837: if (activep == NULL) { /* We are processing a command line directive */
838: cmdline = 1;
839: activep = &cmdline;
840: }
841:
1.267 djm 842: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1.233 djm 843: if ((len = strlen(line)) == 0)
844: return 0;
845: for (len--; len > 0; len--) {
1.267 djm 846: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1.106 djm 847: break;
848: line[len] = '\0';
849: }
1.1 deraadt 850:
1.42 provos 851: s = line;
852: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 853: if ((keyword = strdelim(&s)) == NULL)
854: return 0;
1.42 provos 855: /* Ignore leading whitespace. */
856: if (*keyword == '\0')
1.43 markus 857: keyword = strdelim(&s);
1.56 deraadt 858: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 859: return 0;
1.199 djm 860: /* Match lowercase keyword */
1.207 djm 861: lowercase(keyword);
1.17 markus 862:
1.199 djm 863: opcode = parse_token(keyword, filename, linenum,
864: options->ignored_unknown);
1.17 markus 865:
866: switch (opcode) {
867: case oBadOption:
1.19 markus 868: /* don't panic, but count bad options */
869: return -1;
1.273 djm 870: case oIgnore:
871: return 0;
1.199 djm 872: case oIgnoredUnknownOption:
873: debug("%s line %d: Ignored unknown option \"%s\"",
874: filename, linenum, keyword);
875: return 0;
1.111 djm 876: case oConnectTimeout:
877: intptr = &options->connection_timeout;
1.127 markus 878: parse_time:
1.111 djm 879: arg = strdelim(&s);
880: if (!arg || *arg == '\0')
881: fatal("%s line %d: missing time value.",
882: filename, linenum);
1.221 djm 883: if (strcmp(arg, "none") == 0)
884: value = -1;
885: else if ((value = convtime(arg)) == -1)
1.111 djm 886: fatal("%s line %d: invalid time value.",
887: filename, linenum);
1.160 dtucker 888: if (*activep && *intptr == -1)
1.111 djm 889: *intptr = value;
890: break;
891:
1.17 markus 892: case oForwardAgent:
893: intptr = &options->forward_agent;
1.207 djm 894: parse_flag:
895: multistate_ptr = multistate_flag;
896: parse_multistate:
1.42 provos 897: arg = strdelim(&s);
1.40 ho 898: if (!arg || *arg == '\0')
1.207 djm 899: fatal("%s line %d: missing argument.",
900: filename, linenum);
901: value = -1;
902: for (i = 0; multistate_ptr[i].key != NULL; i++) {
903: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
904: value = multistate_ptr[i].value;
905: break;
906: }
907: }
908: if (value == -1)
909: fatal("%s line %d: unsupported option \"%s\".",
910: filename, linenum, arg);
1.17 markus 911: if (*activep && *intptr == -1)
912: *intptr = value;
913: break;
914:
915: case oForwardX11:
916: intptr = &options->forward_x11;
917: goto parse_flag;
918:
1.123 markus 919: case oForwardX11Trusted:
920: intptr = &options->forward_x11_trusted;
921: goto parse_flag;
1.221 djm 922:
1.186 djm 923: case oForwardX11Timeout:
924: intptr = &options->forward_x11_timeout;
925: goto parse_time;
1.123 markus 926:
1.17 markus 927: case oGatewayPorts:
1.220 millert 928: intptr = &options->fwd_opts.gateway_ports;
1.17 markus 929: goto parse_flag;
930:
1.153 markus 931: case oExitOnForwardFailure:
932: intptr = &options->exit_on_forward_failure;
933: goto parse_flag;
934:
1.17 markus 935: case oUsePrivilegedPort:
936: intptr = &options->use_privileged_port;
937: goto parse_flag;
938:
939: case oPasswordAuthentication:
940: intptr = &options->password_authentication;
941: goto parse_flag;
942:
1.48 markus 943: case oKbdInteractiveAuthentication:
944: intptr = &options->kbd_interactive_authentication;
945: goto parse_flag;
946:
947: case oKbdInteractiveDevices:
948: charptr = &options->kbd_interactive_devices;
949: goto parse_string;
950:
1.50 markus 951: case oPubkeyAuthentication:
952: intptr = &options->pubkey_authentication;
1.30 markus 953: goto parse_flag;
954:
1.72 markus 955: case oHostbasedAuthentication:
956: intptr = &options->hostbased_authentication;
957: goto parse_flag;
958:
1.59 markus 959: case oChallengeResponseAuthentication:
1.78 markus 960: intptr = &options->challenge_response_authentication;
1.17 markus 961: goto parse_flag;
1.108 jakob 962:
1.118 markus 963: case oGssAuthentication:
964: intptr = &options->gss_authentication;
965: goto parse_flag;
966:
967: case oGssDelegateCreds:
968: intptr = &options->gss_deleg_creds;
969: goto parse_flag;
970:
1.17 markus 971: case oBatchMode:
972: intptr = &options->batch_mode;
973: goto parse_flag;
974:
975: case oCheckHostIP:
976: intptr = &options->check_host_ip;
1.167 grunk 977: goto parse_flag;
1.17 markus 978:
1.107 jakob 979: case oVerifyHostKeyDNS:
980: intptr = &options->verify_host_key_dns;
1.207 djm 981: multistate_ptr = multistate_yesnoask;
982: goto parse_multistate;
1.107 jakob 983:
1.17 markus 984: case oStrictHostKeyChecking:
985: intptr = &options->strict_host_key_checking;
1.278 djm 986: multistate_ptr = multistate_strict_hostkey;
1.207 djm 987: goto parse_multistate;
1.17 markus 988:
989: case oCompression:
990: intptr = &options->compression;
991: goto parse_flag;
992:
1.126 markus 993: case oTCPKeepAlive:
994: intptr = &options->tcp_keep_alive;
1.17 markus 995: goto parse_flag;
996:
1.91 markus 997: case oNoHostAuthenticationForLocalhost:
998: intptr = &options->no_host_authentication_for_localhost;
999: goto parse_flag;
1000:
1.17 markus 1001: case oNumberOfPasswordPrompts:
1002: intptr = &options->number_of_password_prompts;
1003: goto parse_int;
1004:
1.105 markus 1005: case oRekeyLimit:
1006: arg = strdelim(&s);
1007: if (!arg || *arg == '\0')
1.198 dtucker 1008: fatal("%.200s line %d: Missing argument.", filename,
1009: linenum);
1010: if (strcmp(arg, "default") == 0) {
1011: val64 = 0;
1012: } else {
1.200 dtucker 1013: if (scan_scaled(arg, &val64) == -1)
1014: fatal("%.200s line %d: Bad number '%s': %s",
1015: filename, linenum, arg, strerror(errno));
1.198 dtucker 1016: if (val64 != 0 && val64 < 16)
1017: fatal("%.200s line %d: RekeyLimit too small",
1018: filename, linenum);
1.105 markus 1019: }
1.165 djm 1020: if (*activep && options->rekey_limit == -1)
1.249 dtucker 1021: options->rekey_limit = val64;
1.198 dtucker 1022: if (s != NULL) { /* optional rekey interval present */
1023: if (strcmp(s, "none") == 0) {
1024: (void)strdelim(&s); /* discard */
1025: break;
1026: }
1027: intptr = &options->rekey_interval;
1028: goto parse_time;
1029: }
1.105 markus 1030: break;
1031:
1.17 markus 1032: case oIdentityFile:
1.42 provos 1033: arg = strdelim(&s);
1.40 ho 1034: if (!arg || *arg == '\0')
1.17 markus 1035: fatal("%.200s line %d: Missing argument.", filename, linenum);
1036: if (*activep) {
1.50 markus 1037: intptr = &options->num_identity_files;
1.27 markus 1038: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 1039: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 1040: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.221 djm 1041: add_identity_file(options, NULL,
1042: arg, flags & SSHCONF_USERCONF);
1.17 markus 1043: }
1044: break;
1045:
1.241 djm 1046: case oCertificateFile:
1047: arg = strdelim(&s);
1048: if (!arg || *arg == '\0')
1049: fatal("%.200s line %d: Missing argument.",
1050: filename, linenum);
1051: if (*activep) {
1052: intptr = &options->num_certificate_files;
1053: if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
1054: fatal("%.200s line %d: Too many certificate "
1055: "files specified (max %d).",
1056: filename, linenum,
1057: SSH_MAX_CERTIFICATE_FILES);
1058: }
1059: add_certificate_file(options, arg,
1060: flags & SSHCONF_USERCONF);
1061: }
1062: break;
1063:
1.34 markus 1064: case oXAuthLocation:
1065: charptr=&options->xauth_location;
1066: goto parse_string;
1067:
1.17 markus 1068: case oUser:
1069: charptr = &options->user;
1070: parse_string:
1.42 provos 1071: arg = strdelim(&s);
1.40 ho 1072: if (!arg || *arg == '\0')
1.193 djm 1073: fatal("%.200s line %d: Missing argument.",
1074: filename, linenum);
1.17 markus 1075: if (*activep && *charptr == NULL)
1.38 provos 1076: *charptr = xstrdup(arg);
1.17 markus 1077: break;
1078:
1079: case oGlobalKnownHostsFile:
1.193 djm 1080: cpptr = (char **)&options->system_hostfiles;
1081: uintptr = &options->num_system_hostfiles;
1082: max_entries = SSH_MAX_HOSTS_FILES;
1083: parse_char_array:
1084: if (*activep && *uintptr == 0) {
1085: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1086: if ((*uintptr) >= max_entries)
1087: fatal("%s line %d: "
1088: "too many authorized keys files.",
1089: filename, linenum);
1090: cpptr[(*uintptr)++] = xstrdup(arg);
1091: }
1092: }
1093: return 0;
1.17 markus 1094:
1095: case oUserKnownHostsFile:
1.193 djm 1096: cpptr = (char **)&options->user_hostfiles;
1097: uintptr = &options->num_user_hostfiles;
1098: max_entries = SSH_MAX_HOSTS_FILES;
1099: goto parse_char_array;
1.27 markus 1100:
1.17 markus 1101: case oHostName:
1102: charptr = &options->hostname;
1103: goto parse_string;
1104:
1.52 markus 1105: case oHostKeyAlias:
1106: charptr = &options->host_key_alias;
1107: goto parse_string;
1108:
1.67 markus 1109: case oPreferredAuthentications:
1110: charptr = &options->preferred_authentications;
1111: goto parse_string;
1112:
1.77 markus 1113: case oBindAddress:
1114: charptr = &options->bind_address;
1115: goto parse_string;
1116:
1.282 djm 1117: case oBindInterface:
1118: charptr = &options->bind_interface;
1119: goto parse_string;
1120:
1.183 markus 1121: case oPKCS11Provider:
1122: charptr = &options->pkcs11_provider;
1.86 markus 1123: goto parse_string;
1.85 jakob 1124:
1.17 markus 1125: case oProxyCommand:
1.144 reyk 1126: charptr = &options->proxy_command;
1.257 djm 1127: /* Ignore ProxyCommand if ProxyJump already specified */
1128: if (options->jump_host != NULL)
1129: charptr = &options->jump_host; /* Skip below */
1.144 reyk 1130: parse_command:
1.113 markus 1131: if (s == NULL)
1132: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 1133: len = strspn(s, WHITESPACE "=");
1.17 markus 1134: if (*activep && *charptr == NULL)
1.102 markus 1135: *charptr = xstrdup(s + len);
1.17 markus 1136: return 0;
1137:
1.257 djm 1138: case oProxyJump:
1139: if (s == NULL) {
1140: fatal("%.200s line %d: Missing argument.",
1141: filename, linenum);
1142: }
1143: len = strspn(s, WHITESPACE "=");
1144: if (parse_jump(s + len, options, *activep) == -1) {
1145: fatal("%.200s line %d: Invalid ProxyJump \"%s\"",
1146: filename, linenum, s + len);
1147: }
1148: return 0;
1149:
1.17 markus 1150: case oPort:
1151: intptr = &options->port;
1152: parse_int:
1.42 provos 1153: arg = strdelim(&s);
1.281 dtucker 1154: if ((errstr = atoi_err(arg, &value)) != NULL)
1155: fatal("%s line %d: integer value %s.",
1156: filename, linenum, errstr);
1.17 markus 1157: if (*activep && *intptr == -1)
1158: *intptr = value;
1159: break;
1160:
1161: case oConnectionAttempts:
1162: intptr = &options->connection_attempts;
1163: goto parse_int;
1164:
1.25 markus 1165: case oCiphers:
1.42 provos 1166: arg = strdelim(&s);
1.40 ho 1167: if (!arg || *arg == '\0')
1.32 markus 1168: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1169: if (*arg != '-' && !ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.31 markus 1170: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1171: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1172: if (*activep && options->ciphers == NULL)
1.38 provos 1173: options->ciphers = xstrdup(arg);
1.25 markus 1174: break;
1175:
1.62 markus 1176: case oMacs:
1177: arg = strdelim(&s);
1178: if (!arg || *arg == '\0')
1179: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1180: if (*arg != '-' && !mac_valid(*arg == '+' ? arg + 1 : arg))
1.62 markus 1181: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1182: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1183: if (*activep && options->macs == NULL)
1184: options->macs = xstrdup(arg);
1185: break;
1186:
1.189 djm 1187: case oKexAlgorithms:
1188: arg = strdelim(&s);
1189: if (!arg || *arg == '\0')
1190: fatal("%.200s line %d: Missing argument.",
1191: filename, linenum);
1.268 djm 1192: if (*arg != '-' &&
1193: !kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.189 djm 1194: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1195: filename, linenum, arg ? arg : "<NONE>");
1196: if (*activep && options->kex_algorithms == NULL)
1197: options->kex_algorithms = xstrdup(arg);
1198: break;
1199:
1.76 markus 1200: case oHostKeyAlgorithms:
1.238 markus 1201: charptr = &options->hostkeyalgorithms;
1202: parse_keytypes:
1.76 markus 1203: arg = strdelim(&s);
1204: if (!arg || *arg == '\0')
1.238 markus 1205: fatal("%.200s line %d: Missing argument.",
1206: filename, linenum);
1.268 djm 1207: if (*arg != '-' &&
1208: !sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.238 markus 1209: fatal("%s line %d: Bad key types '%s'.",
1210: filename, linenum, arg ? arg : "<NONE>");
1211: if (*activep && *charptr == NULL)
1212: *charptr = xstrdup(arg);
1.76 markus 1213: break;
1214:
1.17 markus 1215: case oLogLevel:
1.164 dtucker 1216: log_level_ptr = &options->log_level;
1.42 provos 1217: arg = strdelim(&s);
1.38 provos 1218: value = log_level_number(arg);
1.95 markus 1219: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1220: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1221: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1222: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1223: *log_level_ptr = (LogLevel) value;
1.17 markus 1224: break;
1225:
1.271 dtucker 1226: case oLogFacility:
1227: log_facility_ptr = &options->log_facility;
1228: arg = strdelim(&s);
1229: value = log_facility_number(arg);
1230: if (value == SYSLOG_FACILITY_NOT_SET)
1231: fatal("%.200s line %d: unsupported log facility '%s'",
1232: filename, linenum, arg ? arg : "<NONE>");
1233: if (*log_facility_ptr == -1)
1234: *log_facility_ptr = (SyslogFacility) value;
1235: break;
1236:
1.88 stevesk 1237: case oLocalForward:
1.17 markus 1238: case oRemoteForward:
1.168 stevesk 1239: case oDynamicForward:
1.42 provos 1240: arg = strdelim(&s);
1.135 djm 1241: if (arg == NULL || *arg == '\0')
1.88 stevesk 1242: fatal("%.200s line %d: Missing port argument.",
1243: filename, linenum);
1.135 djm 1244:
1.279 markus 1245: remotefwd = (opcode == oRemoteForward);
1246: dynamicfwd = (opcode == oDynamicForward);
1247:
1248: if (!dynamicfwd) {
1.168 stevesk 1249: arg2 = strdelim(&s);
1.279 markus 1250: if (arg2 == NULL || *arg2 == '\0') {
1251: if (remotefwd)
1252: dynamicfwd = 1;
1253: else
1254: fatal("%.200s line %d: Missing target "
1255: "argument.", filename, linenum);
1256: } else {
1257: /* construct a string for parse_forward */
1258: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg,
1259: arg2);
1260: }
1261: }
1262: if (dynamicfwd)
1.168 stevesk 1263: strlcpy(fwdarg, arg, sizeof(fwdarg));
1264:
1.279 markus 1265: if (parse_forward(&fwd, fwdarg, dynamicfwd, remotefwd) == 0)
1.88 stevesk 1266: fatal("%.200s line %d: Bad forwarding specification.",
1267: filename, linenum);
1.135 djm 1268:
1.88 stevesk 1269: if (*activep) {
1.279 markus 1270: if (remotefwd) {
1271: add_remote_forward(options, &fwd);
1272: } else {
1.135 djm 1273: add_local_forward(options, &fwd);
1.279 markus 1274: }
1.88 stevesk 1275: }
1.17 markus 1276: break;
1.71 markus 1277:
1.90 stevesk 1278: case oClearAllForwardings:
1279: intptr = &options->clear_forwardings;
1280: goto parse_flag;
1281:
1.17 markus 1282: case oHost:
1.206 djm 1283: if (cmdline)
1284: fatal("Host directive not supported as a command-line "
1285: "option");
1.17 markus 1286: *activep = 0;
1.191 djm 1287: arg2 = NULL;
1288: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.252 djm 1289: if ((flags & SSHCONF_NEVERMATCH) != 0)
1290: break;
1.191 djm 1291: negated = *arg == '!';
1292: if (negated)
1293: arg++;
1.38 provos 1294: if (match_pattern(host, arg)) {
1.191 djm 1295: if (negated) {
1296: debug("%.200s line %d: Skipping Host "
1297: "block because of negated match "
1298: "for %.100s", filename, linenum,
1299: arg);
1300: *activep = 0;
1301: break;
1302: }
1303: if (!*activep)
1304: arg2 = arg; /* logged below */
1.17 markus 1305: *activep = 1;
1306: }
1.191 djm 1307: }
1308: if (*activep)
1309: debug("%.200s line %d: Applying options for %.100s",
1310: filename, linenum, arg2);
1.42 provos 1311: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1312: return 0;
1313:
1.206 djm 1314: case oMatch:
1315: if (cmdline)
1316: fatal("Host directive not supported as a command-line "
1317: "option");
1.221 djm 1318: value = match_cfg_line(options, &s, pw, host, original_host,
1319: flags & SSHCONF_POSTCANON, filename, linenum);
1.206 djm 1320: if (value < 0)
1321: fatal("%.200s line %d: Bad Match condition", filename,
1322: linenum);
1.252 djm 1323: *activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
1.206 djm 1324: break;
1325:
1.17 markus 1326: case oEscapeChar:
1327: intptr = &options->escape_char;
1.42 provos 1328: arg = strdelim(&s);
1.40 ho 1329: if (!arg || *arg == '\0')
1.17 markus 1330: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.236 djm 1331: if (strcmp(arg, "none") == 0)
1332: value = SSH_ESCAPECHAR_NONE;
1333: else if (arg[1] == '\0')
1334: value = (u_char) arg[0];
1335: else if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1336: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1337: value = (u_char) arg[1] & 31;
1.17 markus 1338: else {
1339: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1340: filename, linenum);
1.17 markus 1341: /* NOTREACHED */
1342: value = 0; /* Avoid compiler warning. */
1343: }
1344: if (*activep && *intptr == -1)
1345: *intptr = value;
1.112 djm 1346: break;
1347:
1348: case oAddressFamily:
1.114 djm 1349: intptr = &options->address_family;
1.207 djm 1350: multistate_ptr = multistate_addressfamily;
1351: goto parse_multistate;
1.17 markus 1352:
1.101 markus 1353: case oEnableSSHKeysign:
1354: intptr = &options->enable_ssh_keysign;
1355: goto parse_flag;
1356:
1.128 markus 1357: case oIdentitiesOnly:
1358: intptr = &options->identities_only;
1359: goto parse_flag;
1360:
1.127 markus 1361: case oServerAliveInterval:
1362: intptr = &options->server_alive_interval;
1363: goto parse_time;
1364:
1365: case oServerAliveCountMax:
1366: intptr = &options->server_alive_count_max;
1367: goto parse_int;
1368:
1.130 djm 1369: case oSendEnv:
1370: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1371: if (strchr(arg, '=') != NULL)
1372: fatal("%s line %d: Invalid environment name.",
1373: filename, linenum);
1.137 djm 1374: if (!*activep)
1375: continue;
1.286 djm 1376: if (*arg == '-') {
1377: /* Removing an env var */
1378: rm_env(options, arg, filename, linenum);
1379: continue;
1380: } else {
1381: /* Adding an env var */
1382: if (options->num_send_env >= MAX_SEND_ENV)
1383: fatal("%s line %d: too many send env.",
1384: filename, linenum);
1385: options->send_env[options->num_send_env++] =
1386: xstrdup(arg);
1387: }
1.130 djm 1388: }
1389: break;
1390:
1.132 djm 1391: case oControlPath:
1392: charptr = &options->control_path;
1393: goto parse_string;
1394:
1395: case oControlMaster:
1396: intptr = &options->control_master;
1.207 djm 1397: multistate_ptr = multistate_controlmaster;
1398: goto parse_multistate;
1.132 djm 1399:
1.187 djm 1400: case oControlPersist:
1401: /* no/false/yes/true, or a time spec */
1402: intptr = &options->control_persist;
1403: arg = strdelim(&s);
1404: if (!arg || *arg == '\0')
1405: fatal("%.200s line %d: Missing ControlPersist"
1406: " argument.", filename, linenum);
1407: value = 0;
1408: value2 = 0; /* timeout */
1409: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1410: value = 0;
1411: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1412: value = 1;
1413: else if ((value2 = convtime(arg)) >= 0)
1414: value = 1;
1415: else
1416: fatal("%.200s line %d: Bad ControlPersist argument.",
1417: filename, linenum);
1418: if (*activep && *intptr == -1) {
1419: *intptr = value;
1420: options->control_persist_timeout = value2;
1421: }
1422: break;
1423:
1.136 djm 1424: case oHashKnownHosts:
1425: intptr = &options->hash_known_hosts;
1426: goto parse_flag;
1427:
1.144 reyk 1428: case oTunnel:
1429: intptr = &options->tun_open;
1.207 djm 1430: multistate_ptr = multistate_tunnel;
1431: goto parse_multistate;
1.144 reyk 1432:
1433: case oTunnelDevice:
1434: arg = strdelim(&s);
1435: if (!arg || *arg == '\0')
1436: fatal("%.200s line %d: Missing argument.", filename, linenum);
1437: value = a2tun(arg, &value2);
1.145 reyk 1438: if (value == SSH_TUNID_ERR)
1.144 reyk 1439: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1440: if (*activep) {
1441: options->tun_local = value;
1442: options->tun_remote = value2;
1443: }
1444: break;
1445:
1446: case oLocalCommand:
1447: charptr = &options->local_command;
1448: goto parse_command;
1449:
1450: case oPermitLocalCommand:
1451: intptr = &options->permit_local_command;
1452: goto parse_flag;
1453:
1.277 bluhm 1454: case oRemoteCommand:
1455: charptr = &options->remote_command;
1456: goto parse_command;
1457:
1.167 grunk 1458: case oVisualHostKey:
1459: intptr = &options->visual_host_key;
1460: goto parse_flag;
1461:
1.252 djm 1462: case oInclude:
1463: if (cmdline)
1464: fatal("Include directive not supported as a "
1465: "command-line option");
1466: value = 0;
1467: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1468: /*
1469: * Ensure all paths are anchored. User configuration
1470: * files may begin with '~/' but system configurations
1471: * must not. If the path is relative, then treat it
1472: * as living in ~/.ssh for user configurations or
1473: * /etc/ssh for system ones.
1474: */
1475: if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0)
1476: fatal("%.200s line %d: bad include path %s.",
1477: filename, linenum, arg);
1478: if (*arg != '/' && *arg != '~') {
1479: xasprintf(&arg2, "%s/%s",
1480: (flags & SSHCONF_USERCONF) ?
1481: "~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
1482: } else
1483: arg2 = xstrdup(arg);
1484: memset(&gl, 0, sizeof(gl));
1485: r = glob(arg2, GLOB_TILDE, NULL, &gl);
1486: if (r == GLOB_NOMATCH) {
1487: debug("%.200s line %d: include %s matched no "
1488: "files",filename, linenum, arg2);
1.269 dtucker 1489: free(arg2);
1.252 djm 1490: continue;
1491: } else if (r != 0 || gl.gl_pathc < 0)
1492: fatal("%.200s line %d: glob failed for %s.",
1493: filename, linenum, arg2);
1494: free(arg2);
1495: oactive = *activep;
1496: for (i = 0; i < (u_int)gl.gl_pathc; i++) {
1497: debug3("%.200s line %d: Including file %s "
1498: "depth %d%s", filename, linenum,
1499: gl.gl_pathv[i], depth,
1500: oactive ? "" : " (parse only)");
1501: r = read_config_file_depth(gl.gl_pathv[i],
1502: pw, host, original_host, options,
1503: flags | SSHCONF_CHECKPERM |
1504: (oactive ? 0 : SSHCONF_NEVERMATCH),
1505: activep, depth + 1);
1.264 djm 1506: if (r != 1 && errno != ENOENT) {
1.263 djm 1507: fatal("Can't open user config file "
1508: "%.100s: %.100s", gl.gl_pathv[i],
1509: strerror(errno));
1510: }
1.252 djm 1511: /*
1512: * don't let Match in includes clobber the
1513: * containing file's Match state.
1514: */
1515: *activep = oactive;
1516: if (r != 1)
1517: value = -1;
1518: }
1519: globfree(&gl);
1520: }
1521: if (value != 0)
1522: return value;
1523: break;
1524:
1.190 djm 1525: case oIPQoS:
1526: arg = strdelim(&s);
1527: if ((value = parse_ipqos(arg)) == -1)
1528: fatal("%s line %d: Bad IPQoS value: %s",
1529: filename, linenum, arg);
1530: arg = strdelim(&s);
1531: if (arg == NULL)
1532: value2 = value;
1533: else if ((value2 = parse_ipqos(arg)) == -1)
1534: fatal("%s line %d: Bad IPQoS value: %s",
1535: filename, linenum, arg);
1536: if (*activep) {
1537: options->ip_qos_interactive = value;
1538: options->ip_qos_bulk = value2;
1539: }
1540: break;
1541:
1.192 djm 1542: case oRequestTTY:
1543: intptr = &options->request_tty;
1.207 djm 1544: multistate_ptr = multistate_requesttty;
1545: goto parse_multistate;
1.192 djm 1546:
1.199 djm 1547: case oIgnoreUnknown:
1548: charptr = &options->ignored_unknown;
1549: goto parse_string;
1550:
1.205 djm 1551: case oProxyUseFdpass:
1552: intptr = &options->proxy_use_fdpass;
1553: goto parse_flag;
1554:
1.208 djm 1555: case oCanonicalDomains:
1556: value = options->num_canonical_domains != 0;
1557: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.280 millert 1558: if (!valid_domain(arg, 1, &errstr)) {
1559: fatal("%s line %d: %s", filename, linenum,
1560: errstr);
1561: }
1.208 djm 1562: if (!*activep || value)
1563: continue;
1564: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1565: fatal("%s line %d: too many hostname suffixes.",
1566: filename, linenum);
1567: options->canonical_domains[
1568: options->num_canonical_domains++] = xstrdup(arg);
1569: }
1570: break;
1571:
1.209 djm 1572: case oCanonicalizePermittedCNAMEs:
1.208 djm 1573: value = options->num_permitted_cnames != 0;
1574: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1575: /* Either '*' for everything or 'list:list' */
1576: if (strcmp(arg, "*") == 0)
1577: arg2 = arg;
1578: else {
1579: lowercase(arg);
1580: if ((arg2 = strchr(arg, ':')) == NULL ||
1581: arg2[1] == '\0') {
1582: fatal("%s line %d: "
1583: "Invalid permitted CNAME \"%s\"",
1584: filename, linenum, arg);
1585: }
1586: *arg2 = '\0';
1587: arg2++;
1588: }
1589: if (!*activep || value)
1590: continue;
1591: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1592: fatal("%s line %d: too many permitted CNAMEs.",
1593: filename, linenum);
1594: cname = options->permitted_cnames +
1595: options->num_permitted_cnames++;
1596: cname->source_list = xstrdup(arg);
1597: cname->target_list = xstrdup(arg2);
1598: }
1599: break;
1600:
1.209 djm 1601: case oCanonicalizeHostname:
1602: intptr = &options->canonicalize_hostname;
1603: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1604: goto parse_multistate;
1605:
1.209 djm 1606: case oCanonicalizeMaxDots:
1607: intptr = &options->canonicalize_max_dots;
1.208 djm 1608: goto parse_int;
1609:
1.209 djm 1610: case oCanonicalizeFallbackLocal:
1611: intptr = &options->canonicalize_fallback_local;
1.208 djm 1612: goto parse_flag;
1613:
1.220 millert 1614: case oStreamLocalBindMask:
1615: arg = strdelim(&s);
1616: if (!arg || *arg == '\0')
1617: fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum);
1618: /* Parse mode in octal format */
1619: value = strtol(arg, &endofnumber, 8);
1620: if (arg == endofnumber || value < 0 || value > 0777)
1621: fatal("%.200s line %d: Bad mask.", filename, linenum);
1622: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1623: break;
1624:
1625: case oStreamLocalBindUnlink:
1626: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1627: goto parse_flag;
1628:
1.223 djm 1629: case oRevokedHostKeys:
1630: charptr = &options->revoked_host_keys;
1631: goto parse_string;
1632:
1.224 djm 1633: case oFingerprintHash:
1.225 djm 1634: intptr = &options->fingerprint_hash;
1.224 djm 1635: arg = strdelim(&s);
1636: if (!arg || *arg == '\0')
1637: fatal("%.200s line %d: Missing argument.",
1638: filename, linenum);
1639: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1640: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1641: filename, linenum, arg);
1.225 djm 1642: if (*activep && *intptr == -1)
1643: *intptr = value;
1.224 djm 1644: break;
1645:
1.229 djm 1646: case oUpdateHostkeys:
1647: intptr = &options->update_hostkeys;
1.232 djm 1648: multistate_ptr = multistate_yesnoask;
1649: goto parse_multistate;
1.229 djm 1650:
1.230 djm 1651: case oHostbasedKeyTypes:
1652: charptr = &options->hostbased_key_types;
1.238 markus 1653: goto parse_keytypes;
1654:
1655: case oPubkeyAcceptedKeyTypes:
1656: charptr = &options->pubkey_key_types;
1657: goto parse_keytypes;
1.230 djm 1658:
1.246 jcs 1659: case oAddKeysToAgent:
1660: intptr = &options->add_keys_to_agent;
1661: multistate_ptr = multistate_yesnoaskconfirm;
1662: goto parse_multistate;
1663:
1.253 markus 1664: case oIdentityAgent:
1665: charptr = &options->identity_agent;
1666: goto parse_string;
1667:
1.96 markus 1668: case oDeprecated:
1.98 markus 1669: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1670: filename, linenum, keyword);
1.98 markus 1671: return 0;
1.96 markus 1672:
1.110 jakob 1673: case oUnsupported:
1674: error("%s line %d: Unsupported option \"%s\"",
1675: filename, linenum, keyword);
1676: return 0;
1677:
1.17 markus 1678: default:
1.221 djm 1679: fatal("%s: Unimplemented opcode %d", __func__, opcode);
1.17 markus 1680: }
1681:
1682: /* Check that there is no garbage at end of line. */
1.57 djm 1683: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1684: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1685: filename, linenum, arg);
1.39 ho 1686: }
1.17 markus 1687: return 0;
1.1 deraadt 1688: }
1689:
1.19 markus 1690: /*
1691: * Reads the config file and modifies the options accordingly. Options
1692: * should already be initialized before this call. This never returns if
1.89 stevesk 1693: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1694: */
1.89 stevesk 1695: int
1.206 djm 1696: read_config_file(const char *filename, struct passwd *pw, const char *host,
1.221 djm 1697: const char *original_host, Options *options, int flags)
1.1 deraadt 1698: {
1.252 djm 1699: int active = 1;
1700:
1701: return read_config_file_depth(filename, pw, host, original_host,
1702: options, flags, &active, 0);
1703: }
1704:
1705: #define READCONF_MAX_DEPTH 16
1706: static int
1707: read_config_file_depth(const char *filename, struct passwd *pw,
1708: const char *host, const char *original_host, Options *options,
1709: int flags, int *activep, int depth)
1710: {
1.17 markus 1711: FILE *f;
1.270 djm 1712: char line[4096];
1.252 djm 1713: int linenum;
1.17 markus 1714: int bad_options = 0;
1715:
1.252 djm 1716: if (depth < 0 || depth > READCONF_MAX_DEPTH)
1717: fatal("Too many recursive configuration includes");
1718:
1.129 djm 1719: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1720: return 0;
1.129 djm 1721:
1.196 dtucker 1722: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1723: struct stat sb;
1.134 deraadt 1724:
1.131 dtucker 1725: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1726: fatal("fstat %s: %s", filename, strerror(errno));
1727: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1728: (sb.st_mode & 022) != 0))
1.129 djm 1729: fatal("Bad owner or permissions on %s", filename);
1730: }
1.17 markus 1731:
1732: debug("Reading configuration data %.200s", filename);
1733:
1.19 markus 1734: /*
1735: * Mark that we are now processing the options. This flag is turned
1736: * on/off by Host specifications.
1737: */
1.17 markus 1738: linenum = 0;
1739: while (fgets(line, sizeof(line), f)) {
1740: /* Update line number counter. */
1741: linenum++;
1.270 djm 1742: if (strlen(line) == sizeof(line) - 1)
1743: fatal("%s line %d too long", filename, linenum);
1.252 djm 1744: if (process_config_line_depth(options, pw, host, original_host,
1745: line, filename, linenum, activep, flags, depth) != 0)
1.17 markus 1746: bad_options++;
1747: }
1748: fclose(f);
1749: if (bad_options > 0)
1.64 millert 1750: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1751: filename, bad_options);
1.89 stevesk 1752: return 1;
1.1 deraadt 1753: }
1754:
1.218 djm 1755: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1756: int
1757: option_clear_or_none(const char *o)
1758: {
1759: return o == NULL || strcasecmp(o, "none") == 0;
1760: }
1761:
1.19 markus 1762: /*
1763: * Initializes options to special values that indicate that they have not yet
1764: * been set. Read_config_file will only set options with this value. Options
1765: * are processed in the following order: command line, user config file,
1766: * system config file. Last, fill_default_options is called.
1767: */
1.1 deraadt 1768:
1.26 markus 1769: void
1.17 markus 1770: initialize_options(Options * options)
1.1 deraadt 1771: {
1.17 markus 1772: memset(options, 'X', sizeof(*options));
1773: options->forward_agent = -1;
1774: options->forward_x11 = -1;
1.123 markus 1775: options->forward_x11_trusted = -1;
1.186 djm 1776: options->forward_x11_timeout = -1;
1.255 dtucker 1777: options->stdio_forward_host = NULL;
1778: options->stdio_forward_port = 0;
1.256 dtucker 1779: options->clear_forwardings = -1;
1.153 markus 1780: options->exit_on_forward_failure = -1;
1.34 markus 1781: options->xauth_location = NULL;
1.220 millert 1782: options->fwd_opts.gateway_ports = -1;
1783: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
1784: options->fwd_opts.streamlocal_bind_unlink = -1;
1.17 markus 1785: options->use_privileged_port = -1;
1.50 markus 1786: options->pubkey_authentication = -1;
1.78 markus 1787: options->challenge_response_authentication = -1;
1.118 markus 1788: options->gss_authentication = -1;
1789: options->gss_deleg_creds = -1;
1.17 markus 1790: options->password_authentication = -1;
1.48 markus 1791: options->kbd_interactive_authentication = -1;
1792: options->kbd_interactive_devices = NULL;
1.72 markus 1793: options->hostbased_authentication = -1;
1.17 markus 1794: options->batch_mode = -1;
1795: options->check_host_ip = -1;
1796: options->strict_host_key_checking = -1;
1797: options->compression = -1;
1.126 markus 1798: options->tcp_keep_alive = -1;
1.17 markus 1799: options->port = -1;
1.114 djm 1800: options->address_family = -1;
1.17 markus 1801: options->connection_attempts = -1;
1.111 djm 1802: options->connection_timeout = -1;
1.17 markus 1803: options->number_of_password_prompts = -1;
1.25 markus 1804: options->ciphers = NULL;
1.62 markus 1805: options->macs = NULL;
1.189 djm 1806: options->kex_algorithms = NULL;
1.76 markus 1807: options->hostkeyalgorithms = NULL;
1.17 markus 1808: options->num_identity_files = 0;
1.241 djm 1809: options->num_certificate_files = 0;
1.17 markus 1810: options->hostname = NULL;
1.52 markus 1811: options->host_key_alias = NULL;
1.17 markus 1812: options->proxy_command = NULL;
1.257 djm 1813: options->jump_user = NULL;
1814: options->jump_host = NULL;
1815: options->jump_port = -1;
1816: options->jump_extra = NULL;
1.17 markus 1817: options->user = NULL;
1818: options->escape_char = -1;
1.193 djm 1819: options->num_system_hostfiles = 0;
1820: options->num_user_hostfiles = 0;
1.185 djm 1821: options->local_forwards = NULL;
1.17 markus 1822: options->num_local_forwards = 0;
1.185 djm 1823: options->remote_forwards = NULL;
1.17 markus 1824: options->num_remote_forwards = 0;
1.271 dtucker 1825: options->log_facility = SYSLOG_FACILITY_NOT_SET;
1.95 markus 1826: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1827: options->preferred_authentications = NULL;
1.77 markus 1828: options->bind_address = NULL;
1.282 djm 1829: options->bind_interface = NULL;
1.183 markus 1830: options->pkcs11_provider = NULL;
1.101 markus 1831: options->enable_ssh_keysign = - 1;
1.91 markus 1832: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1833: options->identities_only = - 1;
1.105 markus 1834: options->rekey_limit = - 1;
1.198 dtucker 1835: options->rekey_interval = -1;
1.107 jakob 1836: options->verify_host_key_dns = -1;
1.127 markus 1837: options->server_alive_interval = -1;
1838: options->server_alive_count_max = -1;
1.130 djm 1839: options->num_send_env = 0;
1.132 djm 1840: options->control_path = NULL;
1841: options->control_master = -1;
1.187 djm 1842: options->control_persist = -1;
1843: options->control_persist_timeout = 0;
1.136 djm 1844: options->hash_known_hosts = -1;
1.144 reyk 1845: options->tun_open = -1;
1846: options->tun_local = -1;
1847: options->tun_remote = -1;
1848: options->local_command = NULL;
1849: options->permit_local_command = -1;
1.277 bluhm 1850: options->remote_command = NULL;
1.246 jcs 1851: options->add_keys_to_agent = -1;
1.253 markus 1852: options->identity_agent = NULL;
1.167 grunk 1853: options->visual_host_key = -1;
1.190 djm 1854: options->ip_qos_interactive = -1;
1855: options->ip_qos_bulk = -1;
1.192 djm 1856: options->request_tty = -1;
1.205 djm 1857: options->proxy_use_fdpass = -1;
1.199 djm 1858: options->ignored_unknown = NULL;
1.208 djm 1859: options->num_canonical_domains = 0;
1860: options->num_permitted_cnames = 0;
1.209 djm 1861: options->canonicalize_max_dots = -1;
1862: options->canonicalize_fallback_local = -1;
1863: options->canonicalize_hostname = -1;
1.223 djm 1864: options->revoked_host_keys = NULL;
1.224 djm 1865: options->fingerprint_hash = -1;
1.229 djm 1866: options->update_hostkeys = -1;
1.230 djm 1867: options->hostbased_key_types = NULL;
1.238 markus 1868: options->pubkey_key_types = NULL;
1.1 deraadt 1869: }
1870:
1.19 markus 1871: /*
1.218 djm 1872: * A petite version of fill_default_options() that just fills the options
1873: * needed for hostname canonicalization to proceed.
1874: */
1875: void
1876: fill_default_options_for_canonicalization(Options *options)
1877: {
1878: if (options->canonicalize_max_dots == -1)
1879: options->canonicalize_max_dots = 1;
1880: if (options->canonicalize_fallback_local == -1)
1881: options->canonicalize_fallback_local = 1;
1882: if (options->canonicalize_hostname == -1)
1883: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1884: }
1885:
1886: /*
1.19 markus 1887: * Called after processing other sources of option data, this fills those
1888: * options for which no value has been specified with their default values.
1889: */
1.26 markus 1890: void
1.17 markus 1891: fill_default_options(Options * options)
1.1 deraadt 1892: {
1.17 markus 1893: if (options->forward_agent == -1)
1.33 markus 1894: options->forward_agent = 0;
1.17 markus 1895: if (options->forward_x11 == -1)
1.23 markus 1896: options->forward_x11 = 0;
1.123 markus 1897: if (options->forward_x11_trusted == -1)
1898: options->forward_x11_trusted = 0;
1.186 djm 1899: if (options->forward_x11_timeout == -1)
1900: options->forward_x11_timeout = 1200;
1.256 dtucker 1901: /*
1902: * stdio forwarding (-W) changes the default for these but we defer
1903: * setting the values so they can be overridden.
1904: */
1.153 markus 1905: if (options->exit_on_forward_failure == -1)
1.256 dtucker 1906: options->exit_on_forward_failure =
1907: options->stdio_forward_host != NULL ? 1 : 0;
1908: if (options->clear_forwardings == -1)
1909: options->clear_forwardings =
1910: options->stdio_forward_host != NULL ? 1 : 0;
1911: if (options->clear_forwardings == 1)
1912: clear_forwardings(options);
1913:
1.34 markus 1914: if (options->xauth_location == NULL)
1.80 markus 1915: options->xauth_location = _PATH_XAUTH;
1.220 millert 1916: if (options->fwd_opts.gateway_ports == -1)
1917: options->fwd_opts.gateway_ports = 0;
1918: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
1919: options->fwd_opts.streamlocal_bind_mask = 0177;
1920: if (options->fwd_opts.streamlocal_bind_unlink == -1)
1921: options->fwd_opts.streamlocal_bind_unlink = 0;
1.17 markus 1922: if (options->use_privileged_port == -1)
1.65 markus 1923: options->use_privileged_port = 0;
1.50 markus 1924: if (options->pubkey_authentication == -1)
1925: options->pubkey_authentication = 1;
1.78 markus 1926: if (options->challenge_response_authentication == -1)
1.83 markus 1927: options->challenge_response_authentication = 1;
1.118 markus 1928: if (options->gss_authentication == -1)
1.122 markus 1929: options->gss_authentication = 0;
1.118 markus 1930: if (options->gss_deleg_creds == -1)
1931: options->gss_deleg_creds = 0;
1.17 markus 1932: if (options->password_authentication == -1)
1933: options->password_authentication = 1;
1.48 markus 1934: if (options->kbd_interactive_authentication == -1)
1.59 markus 1935: options->kbd_interactive_authentication = 1;
1.72 markus 1936: if (options->hostbased_authentication == -1)
1937: options->hostbased_authentication = 0;
1.17 markus 1938: if (options->batch_mode == -1)
1939: options->batch_mode = 0;
1940: if (options->check_host_ip == -1)
1941: options->check_host_ip = 1;
1942: if (options->strict_host_key_checking == -1)
1.278 djm 1943: options->strict_host_key_checking = SSH_STRICT_HOSTKEY_ASK;
1.17 markus 1944: if (options->compression == -1)
1945: options->compression = 0;
1.126 markus 1946: if (options->tcp_keep_alive == -1)
1947: options->tcp_keep_alive = 1;
1.17 markus 1948: if (options->port == -1)
1949: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1950: if (options->address_family == -1)
1951: options->address_family = AF_UNSPEC;
1.17 markus 1952: if (options->connection_attempts == -1)
1.84 markus 1953: options->connection_attempts = 1;
1.17 markus 1954: if (options->number_of_password_prompts == -1)
1955: options->number_of_password_prompts = 3;
1.76 markus 1956: /* options->hostkeyalgorithms, default set in myproposals.h */
1.246 jcs 1957: if (options->add_keys_to_agent == -1)
1958: options->add_keys_to_agent = 0;
1.17 markus 1959: if (options->num_identity_files == 0) {
1.273 djm 1960: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_RSA, 0);
1961: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_DSA, 0);
1962: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_ECDSA, 0);
1963: add_identity_file(options, "~/",
1964: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.283 markus 1965: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_XMSS, 0);
1.27 markus 1966: }
1.17 markus 1967: if (options->escape_char == -1)
1968: options->escape_char = '~';
1.193 djm 1969: if (options->num_system_hostfiles == 0) {
1970: options->system_hostfiles[options->num_system_hostfiles++] =
1971: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1972: options->system_hostfiles[options->num_system_hostfiles++] =
1973: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1974: }
1975: if (options->num_user_hostfiles == 0) {
1976: options->user_hostfiles[options->num_user_hostfiles++] =
1977: xstrdup(_PATH_SSH_USER_HOSTFILE);
1978: options->user_hostfiles[options->num_user_hostfiles++] =
1979: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1980: }
1.95 markus 1981: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1982: options->log_level = SYSLOG_LEVEL_INFO;
1.271 dtucker 1983: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1984: options->log_facility = SYSLOG_FACILITY_USER;
1.91 markus 1985: if (options->no_host_authentication_for_localhost == - 1)
1986: options->no_host_authentication_for_localhost = 0;
1.128 markus 1987: if (options->identities_only == -1)
1988: options->identities_only = 0;
1.101 markus 1989: if (options->enable_ssh_keysign == -1)
1990: options->enable_ssh_keysign = 0;
1.105 markus 1991: if (options->rekey_limit == -1)
1992: options->rekey_limit = 0;
1.198 dtucker 1993: if (options->rekey_interval == -1)
1994: options->rekey_interval = 0;
1.107 jakob 1995: if (options->verify_host_key_dns == -1)
1996: options->verify_host_key_dns = 0;
1.127 markus 1997: if (options->server_alive_interval == -1)
1998: options->server_alive_interval = 0;
1999: if (options->server_alive_count_max == -1)
2000: options->server_alive_count_max = 3;
1.132 djm 2001: if (options->control_master == -1)
2002: options->control_master = 0;
1.187 djm 2003: if (options->control_persist == -1) {
2004: options->control_persist = 0;
2005: options->control_persist_timeout = 0;
2006: }
1.136 djm 2007: if (options->hash_known_hosts == -1)
2008: options->hash_known_hosts = 0;
1.144 reyk 2009: if (options->tun_open == -1)
1.145 reyk 2010: options->tun_open = SSH_TUNMODE_NO;
2011: if (options->tun_local == -1)
2012: options->tun_local = SSH_TUNID_ANY;
2013: if (options->tun_remote == -1)
2014: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 2015: if (options->permit_local_command == -1)
2016: options->permit_local_command = 0;
1.167 grunk 2017: if (options->visual_host_key == -1)
2018: options->visual_host_key = 0;
1.190 djm 2019: if (options->ip_qos_interactive == -1)
1.284 job 2020: options->ip_qos_interactive = IPTOS_DSCP_AF21;
1.190 djm 2021: if (options->ip_qos_bulk == -1)
1.284 job 2022: options->ip_qos_bulk = IPTOS_DSCP_CS1;
1.192 djm 2023: if (options->request_tty == -1)
2024: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 2025: if (options->proxy_use_fdpass == -1)
2026: options->proxy_use_fdpass = 0;
1.209 djm 2027: if (options->canonicalize_max_dots == -1)
2028: options->canonicalize_max_dots = 1;
2029: if (options->canonicalize_fallback_local == -1)
2030: options->canonicalize_fallback_local = 1;
2031: if (options->canonicalize_hostname == -1)
2032: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.224 djm 2033: if (options->fingerprint_hash == -1)
2034: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.229 djm 2035: if (options->update_hostkeys == -1)
1.231 djm 2036: options->update_hostkeys = 0;
1.239 djm 2037: if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 ||
2038: kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 ||
2039: kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 ||
2040: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2041: &options->hostbased_key_types) != 0 ||
2042: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2043: &options->pubkey_key_types) != 0)
2044: fatal("%s: kex_assemble_names failed", __func__);
1.224 djm 2045:
1.207 djm 2046: #define CLEAR_ON_NONE(v) \
2047: do { \
1.218 djm 2048: if (option_clear_or_none(v)) { \
1.207 djm 2049: free(v); \
2050: v = NULL; \
2051: } \
2052: } while(0)
2053: CLEAR_ON_NONE(options->local_command);
1.277 bluhm 2054: CLEAR_ON_NONE(options->remote_command);
1.207 djm 2055: CLEAR_ON_NONE(options->proxy_command);
2056: CLEAR_ON_NONE(options->control_path);
1.223 djm 2057: CLEAR_ON_NONE(options->revoked_host_keys);
1.287 ! djm 2058: if (options->jump_host != NULL &&
! 2059: strcmp(options->jump_host, "none") == 0 &&
! 2060: options->jump_port == 0 && options->jump_user == NULL) {
! 2061: free(options->jump_host);
! 2062: options->jump_host = NULL;
! 2063: }
1.254 markus 2064: /* options->identity_agent distinguishes NULL from 'none' */
1.17 markus 2065: /* options->user will be set in the main program if appropriate */
2066: /* options->hostname will be set in the main program if appropriate */
1.52 markus 2067: /* options->host_key_alias should not be set by default */
1.67 markus 2068: /* options->preferred_authentications will be set in ssh */
1.135 djm 2069: }
2070:
1.220 millert 2071: struct fwdarg {
2072: char *arg;
2073: int ispath;
2074: };
2075:
2076: /*
2077: * parse_fwd_field
2078: * parses the next field in a port forwarding specification.
2079: * sets fwd to the parsed field and advances p past the colon
2080: * or sets it to NULL at end of string.
2081: * returns 0 on success, else non-zero.
2082: */
2083: static int
2084: parse_fwd_field(char **p, struct fwdarg *fwd)
2085: {
2086: char *ep, *cp = *p;
2087: int ispath = 0;
2088:
2089: if (*cp == '\0') {
2090: *p = NULL;
2091: return -1; /* end of string */
2092: }
2093:
2094: /*
2095: * A field escaped with square brackets is used literally.
2096: * XXX - allow ']' to be escaped via backslash?
2097: */
2098: if (*cp == '[') {
2099: /* find matching ']' */
2100: for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
2101: if (*ep == '/')
2102: ispath = 1;
2103: }
2104: /* no matching ']' or not at end of field. */
2105: if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
2106: return -1;
2107: /* NUL terminate the field and advance p past the colon */
2108: *ep++ = '\0';
2109: if (*ep != '\0')
2110: *ep++ = '\0';
2111: fwd->arg = cp + 1;
2112: fwd->ispath = ispath;
2113: *p = ep;
2114: return 0;
2115: }
2116:
2117: for (cp = *p; *cp != '\0'; cp++) {
2118: switch (*cp) {
2119: case '\\':
2120: memmove(cp, cp + 1, strlen(cp + 1) + 1);
1.237 djm 2121: if (*cp == '\0')
2122: return -1;
1.220 millert 2123: break;
2124: case '/':
2125: ispath = 1;
2126: break;
2127: case ':':
2128: *cp++ = '\0';
2129: goto done;
2130: }
2131: }
2132: done:
2133: fwd->arg = *p;
2134: fwd->ispath = ispath;
2135: *p = cp;
2136: return 0;
2137: }
2138:
1.135 djm 2139: /*
2140: * parse_forward
2141: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 2142: * dynamicfwd == 0
1.220 millert 2143: * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
2144: * listenpath:connectpath
1.168 stevesk 2145: * dynamicfwd == 1
2146: * [listenhost:]listenport
1.135 djm 2147: * returns number of arguments parsed or zero on error
2148: */
2149: int
1.220 millert 2150: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 2151: {
1.220 millert 2152: struct fwdarg fwdargs[4];
2153: char *p, *cp;
1.135 djm 2154: int i;
2155:
1.220 millert 2156: memset(fwd, 0, sizeof(*fwd));
2157: memset(fwdargs, 0, sizeof(fwdargs));
1.135 djm 2158:
2159: cp = p = xstrdup(fwdspec);
2160:
2161: /* skip leading spaces */
1.214 deraadt 2162: while (isspace((u_char)*cp))
1.135 djm 2163: cp++;
2164:
1.220 millert 2165: for (i = 0; i < 4; ++i) {
2166: if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.135 djm 2167: break;
1.220 millert 2168: }
1.135 djm 2169:
1.170 stevesk 2170: /* Check for trailing garbage */
1.220 millert 2171: if (cp != NULL && *cp != '\0') {
1.135 djm 2172: i = 0; /* failure */
1.220 millert 2173: }
1.135 djm 2174:
2175: switch (i) {
1.168 stevesk 2176: case 1:
1.220 millert 2177: if (fwdargs[0].ispath) {
2178: fwd->listen_path = xstrdup(fwdargs[0].arg);
2179: fwd->listen_port = PORT_STREAMLOCAL;
2180: } else {
2181: fwd->listen_host = NULL;
2182: fwd->listen_port = a2port(fwdargs[0].arg);
2183: }
1.168 stevesk 2184: fwd->connect_host = xstrdup("socks");
2185: break;
2186:
2187: case 2:
1.220 millert 2188: if (fwdargs[0].ispath && fwdargs[1].ispath) {
2189: fwd->listen_path = xstrdup(fwdargs[0].arg);
2190: fwd->listen_port = PORT_STREAMLOCAL;
2191: fwd->connect_path = xstrdup(fwdargs[1].arg);
2192: fwd->connect_port = PORT_STREAMLOCAL;
2193: } else if (fwdargs[1].ispath) {
2194: fwd->listen_host = NULL;
2195: fwd->listen_port = a2port(fwdargs[0].arg);
2196: fwd->connect_path = xstrdup(fwdargs[1].arg);
2197: fwd->connect_port = PORT_STREAMLOCAL;
2198: } else {
2199: fwd->listen_host = xstrdup(fwdargs[0].arg);
2200: fwd->listen_port = a2port(fwdargs[1].arg);
2201: fwd->connect_host = xstrdup("socks");
2202: }
1.168 stevesk 2203: break;
2204:
1.135 djm 2205: case 3:
1.220 millert 2206: if (fwdargs[0].ispath) {
2207: fwd->listen_path = xstrdup(fwdargs[0].arg);
2208: fwd->listen_port = PORT_STREAMLOCAL;
2209: fwd->connect_host = xstrdup(fwdargs[1].arg);
2210: fwd->connect_port = a2port(fwdargs[2].arg);
2211: } else if (fwdargs[2].ispath) {
2212: fwd->listen_host = xstrdup(fwdargs[0].arg);
2213: fwd->listen_port = a2port(fwdargs[1].arg);
2214: fwd->connect_path = xstrdup(fwdargs[2].arg);
2215: fwd->connect_port = PORT_STREAMLOCAL;
2216: } else {
2217: fwd->listen_host = NULL;
2218: fwd->listen_port = a2port(fwdargs[0].arg);
2219: fwd->connect_host = xstrdup(fwdargs[1].arg);
2220: fwd->connect_port = a2port(fwdargs[2].arg);
2221: }
1.135 djm 2222: break;
2223:
2224: case 4:
1.220 millert 2225: fwd->listen_host = xstrdup(fwdargs[0].arg);
2226: fwd->listen_port = a2port(fwdargs[1].arg);
2227: fwd->connect_host = xstrdup(fwdargs[2].arg);
2228: fwd->connect_port = a2port(fwdargs[3].arg);
1.135 djm 2229: break;
2230: default:
2231: i = 0; /* failure */
2232: }
2233:
1.202 djm 2234: free(p);
1.135 djm 2235:
1.168 stevesk 2236: if (dynamicfwd) {
2237: if (!(i == 1 || i == 2))
2238: goto fail_free;
2239: } else {
1.220 millert 2240: if (!(i == 3 || i == 4)) {
2241: if (fwd->connect_path == NULL &&
2242: fwd->listen_path == NULL)
2243: goto fail_free;
2244: }
2245: if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.168 stevesk 2246: goto fail_free;
2247: }
2248:
1.220 millert 2249: if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
2250: (!remotefwd && fwd->listen_port == 0))
1.135 djm 2251: goto fail_free;
2252: if (fwd->connect_host != NULL &&
2253: strlen(fwd->connect_host) >= NI_MAXHOST)
2254: goto fail_free;
1.220 millert 2255: /* XXX - if connecting to a remote socket, max sun len may not match this host */
2256: if (fwd->connect_path != NULL &&
2257: strlen(fwd->connect_path) >= PATH_MAX_SUN)
2258: goto fail_free;
1.176 djm 2259: if (fwd->listen_host != NULL &&
2260: strlen(fwd->listen_host) >= NI_MAXHOST)
2261: goto fail_free;
1.220 millert 2262: if (fwd->listen_path != NULL &&
2263: strlen(fwd->listen_path) >= PATH_MAX_SUN)
2264: goto fail_free;
1.135 djm 2265:
2266: return (i);
2267:
2268: fail_free:
1.202 djm 2269: free(fwd->connect_host);
2270: fwd->connect_host = NULL;
1.220 millert 2271: free(fwd->connect_path);
2272: fwd->connect_path = NULL;
1.202 djm 2273: free(fwd->listen_host);
2274: fwd->listen_host = NULL;
1.220 millert 2275: free(fwd->listen_path);
2276: fwd->listen_path = NULL;
1.135 djm 2277: return (0);
1.221 djm 2278: }
2279:
1.257 djm 2280: int
2281: parse_jump(const char *s, Options *o, int active)
2282: {
2283: char *orig, *sdup, *cp;
2284: char *host = NULL, *user = NULL;
1.258 naddy 2285: int ret = -1, port = -1, first;
1.257 djm 2286:
2287: active &= o->proxy_command == NULL && o->jump_host == NULL;
2288:
2289: orig = sdup = xstrdup(s);
1.258 naddy 2290: first = active;
1.259 djm 2291: do {
1.287 ! djm 2292: if (strcasecmp(s, "none") == 0)
! 2293: break;
1.259 djm 2294: if ((cp = strrchr(sdup, ',')) == NULL)
2295: cp = sdup; /* last */
2296: else
2297: *cp++ = '\0';
2298:
1.258 naddy 2299: if (first) {
1.257 djm 2300: /* First argument and configuration is active */
1.280 millert 2301: if (parse_ssh_uri(cp, &user, &host, &port) == -1 ||
2302: parse_user_host_port(cp, &user, &host, &port) != 0)
1.257 djm 2303: goto out;
2304: } else {
2305: /* Subsequent argument or inactive configuration */
1.280 millert 2306: if (parse_ssh_uri(cp, NULL, NULL, NULL) == -1 ||
2307: parse_user_host_port(cp, NULL, NULL, NULL) != 0)
1.257 djm 2308: goto out;
2309: }
1.258 naddy 2310: first = 0; /* only check syntax for subsequent hosts */
1.259 djm 2311: } while (cp != sdup);
1.257 djm 2312: /* success */
1.258 naddy 2313: if (active) {
1.287 ! djm 2314: if (strcasecmp(s, "none") == 0) {
! 2315: o->jump_host = xstrdup("none");
! 2316: o->jump_port = 0;
! 2317: } else {
! 2318: o->jump_user = user;
! 2319: o->jump_host = host;
! 2320: o->jump_port = port;
! 2321: o->proxy_command = xstrdup("none");
! 2322: user = host = NULL;
! 2323: if ((cp = strrchr(s, ',')) != NULL && cp != s) {
! 2324: o->jump_extra = xstrdup(s);
! 2325: o->jump_extra[cp - s] = '\0';
! 2326: }
1.259 djm 2327: }
1.258 naddy 2328: }
1.257 djm 2329: ret = 0;
2330: out:
1.258 naddy 2331: free(orig);
1.257 djm 2332: free(user);
2333: free(host);
2334: return ret;
1.280 millert 2335: }
2336:
2337: int
2338: parse_ssh_uri(const char *uri, char **userp, char **hostp, int *portp)
2339: {
2340: char *path;
2341: int r;
2342:
2343: r = parse_uri("ssh", uri, userp, hostp, portp, &path);
2344: if (r == 0 && path != NULL)
2345: r = -1; /* path not allowed */
2346: return r;
1.257 djm 2347: }
2348:
1.221 djm 2349: /* XXX the following is a near-vebatim copy from servconf.c; refactor */
2350: static const char *
2351: fmt_multistate_int(int val, const struct multistate *m)
2352: {
2353: u_int i;
2354:
2355: for (i = 0; m[i].key != NULL; i++) {
2356: if (m[i].value == val)
2357: return m[i].key;
2358: }
2359: return "UNKNOWN";
2360: }
2361:
2362: static const char *
2363: fmt_intarg(OpCodes code, int val)
2364: {
2365: if (val == -1)
2366: return "unset";
2367: switch (code) {
2368: case oAddressFamily:
2369: return fmt_multistate_int(val, multistate_addressfamily);
2370: case oVerifyHostKeyDNS:
1.232 djm 2371: case oUpdateHostkeys:
1.221 djm 2372: return fmt_multistate_int(val, multistate_yesnoask);
1.278 djm 2373: case oStrictHostKeyChecking:
2374: return fmt_multistate_int(val, multistate_strict_hostkey);
1.221 djm 2375: case oControlMaster:
2376: return fmt_multistate_int(val, multistate_controlmaster);
2377: case oTunnel:
2378: return fmt_multistate_int(val, multistate_tunnel);
2379: case oRequestTTY:
2380: return fmt_multistate_int(val, multistate_requesttty);
2381: case oCanonicalizeHostname:
2382: return fmt_multistate_int(val, multistate_canonicalizehostname);
1.285 djm 2383: case oAddKeysToAgent:
2384: return fmt_multistate_int(val, multistate_yesnoaskconfirm);
1.224 djm 2385: case oFingerprintHash:
2386: return ssh_digest_alg_name(val);
1.221 djm 2387: default:
2388: switch (val) {
2389: case 0:
2390: return "no";
2391: case 1:
2392: return "yes";
2393: default:
2394: return "UNKNOWN";
2395: }
2396: }
2397: }
2398:
2399: static const char *
2400: lookup_opcode_name(OpCodes code)
2401: {
2402: u_int i;
2403:
2404: for (i = 0; keywords[i].name != NULL; i++)
2405: if (keywords[i].opcode == code)
2406: return(keywords[i].name);
2407: return "UNKNOWN";
2408: }
2409:
2410: static void
2411: dump_cfg_int(OpCodes code, int val)
2412: {
2413: printf("%s %d\n", lookup_opcode_name(code), val);
2414: }
2415:
2416: static void
2417: dump_cfg_fmtint(OpCodes code, int val)
2418: {
2419: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2420: }
2421:
2422: static void
2423: dump_cfg_string(OpCodes code, const char *val)
2424: {
2425: if (val == NULL)
2426: return;
2427: printf("%s %s\n", lookup_opcode_name(code), val);
2428: }
2429:
2430: static void
2431: dump_cfg_strarray(OpCodes code, u_int count, char **vals)
2432: {
2433: u_int i;
2434:
2435: for (i = 0; i < count; i++)
2436: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2437: }
2438:
2439: static void
2440: dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
2441: {
2442: u_int i;
2443:
2444: printf("%s", lookup_opcode_name(code));
2445: for (i = 0; i < count; i++)
2446: printf(" %s", vals[i]);
2447: printf("\n");
2448: }
2449:
2450: static void
2451: dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
2452: {
2453: const struct Forward *fwd;
2454: u_int i;
2455:
2456: /* oDynamicForward */
2457: for (i = 0; i < count; i++) {
2458: fwd = &fwds[i];
1.265 djm 2459: if (code == oDynamicForward && fwd->connect_host != NULL &&
1.221 djm 2460: strcmp(fwd->connect_host, "socks") != 0)
2461: continue;
1.265 djm 2462: if (code == oLocalForward && fwd->connect_host != NULL &&
1.221 djm 2463: strcmp(fwd->connect_host, "socks") == 0)
2464: continue;
2465: printf("%s", lookup_opcode_name(code));
2466: if (fwd->listen_port == PORT_STREAMLOCAL)
2467: printf(" %s", fwd->listen_path);
2468: else if (fwd->listen_host == NULL)
2469: printf(" %d", fwd->listen_port);
2470: else {
2471: printf(" [%s]:%d",
2472: fwd->listen_host, fwd->listen_port);
2473: }
2474: if (code != oDynamicForward) {
2475: if (fwd->connect_port == PORT_STREAMLOCAL)
2476: printf(" %s", fwd->connect_path);
2477: else if (fwd->connect_host == NULL)
2478: printf(" %d", fwd->connect_port);
2479: else {
2480: printf(" [%s]:%d",
2481: fwd->connect_host, fwd->connect_port);
2482: }
2483: }
2484: printf("\n");
2485: }
2486: }
2487:
2488: void
2489: dump_client_config(Options *o, const char *host)
2490: {
2491: int i;
1.257 djm 2492: char buf[8];
1.221 djm 2493:
1.240 djm 2494: /* This is normally prepared in ssh_kex2 */
2495: if (kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->hostkeyalgorithms) != 0)
2496: fatal("%s: kex_assemble_names failed", __func__);
2497:
1.221 djm 2498: /* Most interesting options first: user, host, port */
2499: dump_cfg_string(oUser, o->user);
2500: dump_cfg_string(oHostName, host);
2501: dump_cfg_int(oPort, o->port);
2502:
2503: /* Flag options */
1.285 djm 2504: dump_cfg_fmtint(oAddKeysToAgent, o->add_keys_to_agent);
1.221 djm 2505: dump_cfg_fmtint(oAddressFamily, o->address_family);
2506: dump_cfg_fmtint(oBatchMode, o->batch_mode);
2507: dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
2508: dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
2509: dump_cfg_fmtint(oChallengeResponseAuthentication, o->challenge_response_authentication);
2510: dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
2511: dump_cfg_fmtint(oCompression, o->compression);
2512: dump_cfg_fmtint(oControlMaster, o->control_master);
2513: dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
1.256 dtucker 2514: dump_cfg_fmtint(oClearAllForwardings, o->clear_forwardings);
1.221 djm 2515: dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
1.224 djm 2516: dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
1.221 djm 2517: dump_cfg_fmtint(oForwardAgent, o->forward_agent);
2518: dump_cfg_fmtint(oForwardX11, o->forward_x11);
2519: dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
2520: dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
2521: #ifdef GSSAPI
2522: dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
2523: dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
2524: #endif /* GSSAPI */
2525: dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
2526: dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
2527: dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
2528: dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
2529: dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
2530: dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
2531: dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
2532: dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
2533: dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
2534: dump_cfg_fmtint(oRequestTTY, o->request_tty);
2535: dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
2536: dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
2537: dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
2538: dump_cfg_fmtint(oTunnel, o->tun_open);
2539: dump_cfg_fmtint(oUsePrivilegedPort, o->use_privileged_port);
2540: dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
2541: dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
1.229 djm 2542: dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
1.221 djm 2543:
2544: /* Integer options */
2545: dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
2546: dump_cfg_int(oConnectionAttempts, o->connection_attempts);
2547: dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
2548: dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
2549: dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
2550: dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
2551:
2552: /* String options */
2553: dump_cfg_string(oBindAddress, o->bind_address);
1.282 djm 2554: dump_cfg_string(oBindInterface, o->bind_interface);
1.221 djm 2555: dump_cfg_string(oCiphers, o->ciphers ? o->ciphers : KEX_CLIENT_ENCRYPT);
2556: dump_cfg_string(oControlPath, o->control_path);
1.240 djm 2557: dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
1.221 djm 2558: dump_cfg_string(oHostKeyAlias, o->host_key_alias);
1.230 djm 2559: dump_cfg_string(oHostbasedKeyTypes, o->hostbased_key_types);
1.253 markus 2560: dump_cfg_string(oIdentityAgent, o->identity_agent);
1.285 djm 2561: dump_cfg_string(oIgnoreUnknown, o->ignored_unknown);
1.221 djm 2562: dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
2563: dump_cfg_string(oKexAlgorithms, o->kex_algorithms ? o->kex_algorithms : KEX_CLIENT_KEX);
2564: dump_cfg_string(oLocalCommand, o->local_command);
1.277 bluhm 2565: dump_cfg_string(oRemoteCommand, o->remote_command);
1.221 djm 2566: dump_cfg_string(oLogLevel, log_level_name(o->log_level));
2567: dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC);
1.266 djm 2568: #ifdef ENABLE_PKCS11
1.221 djm 2569: dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
1.266 djm 2570: #endif
1.221 djm 2571: dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
1.242 djm 2572: dump_cfg_string(oPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.230 djm 2573: dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
1.221 djm 2574: dump_cfg_string(oXAuthLocation, o->xauth_location);
2575:
1.230 djm 2576: /* Forwards */
1.221 djm 2577: dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
2578: dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
2579: dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
2580:
2581: /* String array options */
2582: dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
2583: dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
1.285 djm 2584: dump_cfg_strarray(oCertificateFile, o->num_certificate_files, o->certificate_files);
1.221 djm 2585: dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
2586: dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
2587: dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
2588:
2589: /* Special cases */
2590:
2591: /* oConnectTimeout */
2592: if (o->connection_timeout == -1)
2593: printf("connecttimeout none\n");
2594: else
2595: dump_cfg_int(oConnectTimeout, o->connection_timeout);
2596:
2597: /* oTunnelDevice */
2598: printf("tunneldevice");
2599: if (o->tun_local == SSH_TUNID_ANY)
2600: printf(" any");
2601: else
2602: printf(" %d", o->tun_local);
2603: if (o->tun_remote == SSH_TUNID_ANY)
2604: printf(":any");
2605: else
2606: printf(":%d", o->tun_remote);
2607: printf("\n");
2608:
2609: /* oCanonicalizePermittedCNAMEs */
2610: if ( o->num_permitted_cnames > 0) {
2611: printf("canonicalizePermittedcnames");
2612: for (i = 0; i < o->num_permitted_cnames; i++) {
2613: printf(" %s:%s", o->permitted_cnames[i].source_list,
2614: o->permitted_cnames[i].target_list);
2615: }
2616: printf("\n");
2617: }
2618:
2619: /* oControlPersist */
2620: if (o->control_persist == 0 || o->control_persist_timeout == 0)
2621: dump_cfg_fmtint(oControlPersist, o->control_persist);
2622: else
2623: dump_cfg_int(oControlPersist, o->control_persist_timeout);
2624:
2625: /* oEscapeChar */
2626: if (o->escape_char == SSH_ESCAPECHAR_NONE)
2627: printf("escapechar none\n");
2628: else {
1.257 djm 2629: vis(buf, o->escape_char, VIS_WHITE, 0);
2630: printf("escapechar %s\n", buf);
1.221 djm 2631: }
2632:
2633: /* oIPQoS */
2634: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2635: printf("%s\n", iptos2str(o->ip_qos_bulk));
2636:
2637: /* oRekeyLimit */
1.249 dtucker 2638: printf("rekeylimit %llu %d\n",
2639: (unsigned long long)o->rekey_limit, o->rekey_interval);
1.221 djm 2640:
2641: /* oStreamLocalBindMask */
2642: printf("streamlocalbindmask 0%o\n",
2643: o->fwd_opts.streamlocal_bind_mask);
1.285 djm 2644:
2645: /* oLogFacility */
2646: printf("syslogfacility %s\n", log_facility_name(o->log_facility));
1.257 djm 2647:
2648: /* oProxyCommand / oProxyJump */
2649: if (o->jump_host == NULL)
2650: dump_cfg_string(oProxyCommand, o->proxy_command);
2651: else {
2652: /* Check for numeric addresses */
2653: i = strchr(o->jump_host, ':') != NULL ||
2654: strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
2655: snprintf(buf, sizeof(buf), "%d", o->jump_port);
2656: printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
1.259 djm 2657: /* optional additional jump spec */
2658: o->jump_extra == NULL ? "" : o->jump_extra,
2659: o->jump_extra == NULL ? "" : ",",
1.257 djm 2660: /* optional user */
2661: o->jump_user == NULL ? "" : o->jump_user,
2662: o->jump_user == NULL ? "" : "@",
2663: /* opening [ if hostname is numeric */
2664: i ? "[" : "",
2665: /* mandatory hostname */
2666: o->jump_host,
2667: /* closing ] if hostname is numeric */
2668: i ? "]" : "",
2669: /* optional port number */
2670: o->jump_port <= 0 ? "" : ":",
1.259 djm 2671: o->jump_port <= 0 ? "" : buf);
1.257 djm 2672: }
1.1 deraadt 2673: }
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