Annotation of src/usr.bin/ssh/readconf.c, Revision 1.283
1.283 ! markus 1: /* $OpenBSD: readconf.c,v 1.282 2018/02/23 02:34:33 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:
1.19 markus 672: /*
1.70 stevesk 673: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 674: */
1.26 markus 675: static OpCodes
1.199 djm 676: parse_token(const char *cp, const char *filename, int linenum,
677: const char *ignored_unknown)
1.1 deraadt 678: {
1.199 djm 679: int i;
1.1 deraadt 680:
1.17 markus 681: for (i = 0; keywords[i].name; i++)
1.199 djm 682: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 683: return keywords[i].opcode;
1.235 djm 684: if (ignored_unknown != NULL &&
685: match_pattern_list(cp, ignored_unknown, 1) == 1)
1.199 djm 686: return oIgnoredUnknownOption;
1.75 stevesk 687: error("%s: line %d: Bad configuration option: %s",
688: filename, linenum, cp);
1.17 markus 689: return oBadOption;
1.1 deraadt 690: }
691:
1.207 djm 692: /* Multistate option parsing */
693: struct multistate {
694: char *key;
695: int value;
696: };
697: static const struct multistate multistate_flag[] = {
698: { "true", 1 },
699: { "false", 0 },
700: { "yes", 1 },
701: { "no", 0 },
702: { NULL, -1 }
703: };
704: static const struct multistate multistate_yesnoask[] = {
705: { "true", 1 },
706: { "false", 0 },
707: { "yes", 1 },
708: { "no", 0 },
709: { "ask", 2 },
710: { NULL, -1 }
711: };
1.278 djm 712: static const struct multistate multistate_strict_hostkey[] = {
713: { "true", SSH_STRICT_HOSTKEY_YES },
714: { "false", SSH_STRICT_HOSTKEY_OFF },
715: { "yes", SSH_STRICT_HOSTKEY_YES },
716: { "no", SSH_STRICT_HOSTKEY_OFF },
717: { "ask", SSH_STRICT_HOSTKEY_ASK },
718: { "off", SSH_STRICT_HOSTKEY_OFF },
719: { "accept-new", SSH_STRICT_HOSTKEY_NEW },
720: { NULL, -1 }
721: };
1.246 jcs 722: static const struct multistate multistate_yesnoaskconfirm[] = {
723: { "true", 1 },
724: { "false", 0 },
725: { "yes", 1 },
726: { "no", 0 },
727: { "ask", 2 },
728: { "confirm", 3 },
729: { NULL, -1 }
730: };
1.207 djm 731: static const struct multistate multistate_addressfamily[] = {
732: { "inet", AF_INET },
733: { "inet6", AF_INET6 },
734: { "any", AF_UNSPEC },
735: { NULL, -1 }
736: };
737: static const struct multistate multistate_controlmaster[] = {
738: { "true", SSHCTL_MASTER_YES },
739: { "yes", SSHCTL_MASTER_YES },
740: { "false", SSHCTL_MASTER_NO },
741: { "no", SSHCTL_MASTER_NO },
742: { "auto", SSHCTL_MASTER_AUTO },
743: { "ask", SSHCTL_MASTER_ASK },
744: { "autoask", SSHCTL_MASTER_AUTO_ASK },
745: { NULL, -1 }
746: };
747: static const struct multistate multistate_tunnel[] = {
748: { "ethernet", SSH_TUNMODE_ETHERNET },
749: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
750: { "true", SSH_TUNMODE_DEFAULT },
751: { "yes", SSH_TUNMODE_DEFAULT },
752: { "false", SSH_TUNMODE_NO },
753: { "no", SSH_TUNMODE_NO },
754: { NULL, -1 }
755: };
756: static const struct multistate multistate_requesttty[] = {
757: { "true", REQUEST_TTY_YES },
758: { "yes", REQUEST_TTY_YES },
759: { "false", REQUEST_TTY_NO },
760: { "no", REQUEST_TTY_NO },
761: { "force", REQUEST_TTY_FORCE },
762: { "auto", REQUEST_TTY_AUTO },
763: { NULL, -1 }
764: };
1.209 djm 765: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 766: { "true", SSH_CANONICALISE_YES },
767: { "false", SSH_CANONICALISE_NO },
768: { "yes", SSH_CANONICALISE_YES },
769: { "no", SSH_CANONICALISE_NO },
770: { "always", SSH_CANONICALISE_ALWAYS },
771: { NULL, -1 }
772: };
1.207 djm 773:
1.19 markus 774: /*
775: * Processes a single option line as used in the configuration files. This
776: * only sets those values that have not already been set.
777: */
1.14 markus 778: int
1.206 djm 779: process_config_line(Options *options, struct passwd *pw, const char *host,
1.221 djm 780: const char *original_host, char *line, const char *filename,
781: int linenum, int *activep, int flags)
1.1 deraadt 782: {
1.252 djm 783: return process_config_line_depth(options, pw, host, original_host,
784: line, filename, linenum, activep, flags, 0);
785: }
786:
787: #define WHITESPACE " \t\r\n"
788: static int
789: process_config_line_depth(Options *options, struct passwd *pw, const char *host,
790: const char *original_host, char *line, const char *filename,
791: int linenum, int *activep, int flags, int depth)
792: {
1.193 djm 793: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
794: char **cpptr, fwdarg[256];
1.199 djm 795: u_int i, *uintptr, max_entries = 0;
1.252 djm 796: int r, oactive, negated, opcode, *intptr, value, value2, cmdline = 0;
1.279 markus 797: int remotefwd, dynamicfwd;
1.164 dtucker 798: LogLevel *log_level_ptr;
1.271 dtucker 799: SyslogFacility *log_facility_ptr;
1.201 dtucker 800: long long val64;
1.102 markus 801: size_t len;
1.220 millert 802: struct Forward fwd;
1.207 djm 803: const struct multistate *multistate_ptr;
1.208 djm 804: struct allowed_cname *cname;
1.252 djm 805: glob_t gl;
1.281 dtucker 806: const char *errstr;
1.106 djm 807:
1.206 djm 808: if (activep == NULL) { /* We are processing a command line directive */
809: cmdline = 1;
810: activep = &cmdline;
811: }
812:
1.267 djm 813: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1.233 djm 814: if ((len = strlen(line)) == 0)
815: return 0;
816: for (len--; len > 0; len--) {
1.267 djm 817: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1.106 djm 818: break;
819: line[len] = '\0';
820: }
1.1 deraadt 821:
1.42 provos 822: s = line;
823: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 824: if ((keyword = strdelim(&s)) == NULL)
825: return 0;
1.42 provos 826: /* Ignore leading whitespace. */
827: if (*keyword == '\0')
1.43 markus 828: keyword = strdelim(&s);
1.56 deraadt 829: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 830: return 0;
1.199 djm 831: /* Match lowercase keyword */
1.207 djm 832: lowercase(keyword);
1.17 markus 833:
1.199 djm 834: opcode = parse_token(keyword, filename, linenum,
835: options->ignored_unknown);
1.17 markus 836:
837: switch (opcode) {
838: case oBadOption:
1.19 markus 839: /* don't panic, but count bad options */
840: return -1;
1.273 djm 841: case oIgnore:
842: return 0;
1.199 djm 843: case oIgnoredUnknownOption:
844: debug("%s line %d: Ignored unknown option \"%s\"",
845: filename, linenum, keyword);
846: return 0;
1.111 djm 847: case oConnectTimeout:
848: intptr = &options->connection_timeout;
1.127 markus 849: parse_time:
1.111 djm 850: arg = strdelim(&s);
851: if (!arg || *arg == '\0')
852: fatal("%s line %d: missing time value.",
853: filename, linenum);
1.221 djm 854: if (strcmp(arg, "none") == 0)
855: value = -1;
856: else if ((value = convtime(arg)) == -1)
1.111 djm 857: fatal("%s line %d: invalid time value.",
858: filename, linenum);
1.160 dtucker 859: if (*activep && *intptr == -1)
1.111 djm 860: *intptr = value;
861: break;
862:
1.17 markus 863: case oForwardAgent:
864: intptr = &options->forward_agent;
1.207 djm 865: parse_flag:
866: multistate_ptr = multistate_flag;
867: parse_multistate:
1.42 provos 868: arg = strdelim(&s);
1.40 ho 869: if (!arg || *arg == '\0')
1.207 djm 870: fatal("%s line %d: missing argument.",
871: filename, linenum);
872: value = -1;
873: for (i = 0; multistate_ptr[i].key != NULL; i++) {
874: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
875: value = multistate_ptr[i].value;
876: break;
877: }
878: }
879: if (value == -1)
880: fatal("%s line %d: unsupported option \"%s\".",
881: filename, linenum, arg);
1.17 markus 882: if (*activep && *intptr == -1)
883: *intptr = value;
884: break;
885:
886: case oForwardX11:
887: intptr = &options->forward_x11;
888: goto parse_flag;
889:
1.123 markus 890: case oForwardX11Trusted:
891: intptr = &options->forward_x11_trusted;
892: goto parse_flag;
1.221 djm 893:
1.186 djm 894: case oForwardX11Timeout:
895: intptr = &options->forward_x11_timeout;
896: goto parse_time;
1.123 markus 897:
1.17 markus 898: case oGatewayPorts:
1.220 millert 899: intptr = &options->fwd_opts.gateway_ports;
1.17 markus 900: goto parse_flag;
901:
1.153 markus 902: case oExitOnForwardFailure:
903: intptr = &options->exit_on_forward_failure;
904: goto parse_flag;
905:
1.17 markus 906: case oUsePrivilegedPort:
907: intptr = &options->use_privileged_port;
908: goto parse_flag;
909:
910: case oPasswordAuthentication:
911: intptr = &options->password_authentication;
912: goto parse_flag;
913:
1.48 markus 914: case oKbdInteractiveAuthentication:
915: intptr = &options->kbd_interactive_authentication;
916: goto parse_flag;
917:
918: case oKbdInteractiveDevices:
919: charptr = &options->kbd_interactive_devices;
920: goto parse_string;
921:
1.50 markus 922: case oPubkeyAuthentication:
923: intptr = &options->pubkey_authentication;
1.30 markus 924: goto parse_flag;
925:
1.72 markus 926: case oHostbasedAuthentication:
927: intptr = &options->hostbased_authentication;
928: goto parse_flag;
929:
1.59 markus 930: case oChallengeResponseAuthentication:
1.78 markus 931: intptr = &options->challenge_response_authentication;
1.17 markus 932: goto parse_flag;
1.108 jakob 933:
1.118 markus 934: case oGssAuthentication:
935: intptr = &options->gss_authentication;
936: goto parse_flag;
937:
938: case oGssDelegateCreds:
939: intptr = &options->gss_deleg_creds;
940: goto parse_flag;
941:
1.17 markus 942: case oBatchMode:
943: intptr = &options->batch_mode;
944: goto parse_flag;
945:
946: case oCheckHostIP:
947: intptr = &options->check_host_ip;
1.167 grunk 948: goto parse_flag;
1.17 markus 949:
1.107 jakob 950: case oVerifyHostKeyDNS:
951: intptr = &options->verify_host_key_dns;
1.207 djm 952: multistate_ptr = multistate_yesnoask;
953: goto parse_multistate;
1.107 jakob 954:
1.17 markus 955: case oStrictHostKeyChecking:
956: intptr = &options->strict_host_key_checking;
1.278 djm 957: multistate_ptr = multistate_strict_hostkey;
1.207 djm 958: goto parse_multistate;
1.17 markus 959:
960: case oCompression:
961: intptr = &options->compression;
962: goto parse_flag;
963:
1.126 markus 964: case oTCPKeepAlive:
965: intptr = &options->tcp_keep_alive;
1.17 markus 966: goto parse_flag;
967:
1.91 markus 968: case oNoHostAuthenticationForLocalhost:
969: intptr = &options->no_host_authentication_for_localhost;
970: goto parse_flag;
971:
1.17 markus 972: case oNumberOfPasswordPrompts:
973: intptr = &options->number_of_password_prompts;
974: goto parse_int;
975:
1.105 markus 976: case oRekeyLimit:
977: arg = strdelim(&s);
978: if (!arg || *arg == '\0')
1.198 dtucker 979: fatal("%.200s line %d: Missing argument.", filename,
980: linenum);
981: if (strcmp(arg, "default") == 0) {
982: val64 = 0;
983: } else {
1.200 dtucker 984: if (scan_scaled(arg, &val64) == -1)
985: fatal("%.200s line %d: Bad number '%s': %s",
986: filename, linenum, arg, strerror(errno));
1.198 dtucker 987: if (val64 != 0 && val64 < 16)
988: fatal("%.200s line %d: RekeyLimit too small",
989: filename, linenum);
1.105 markus 990: }
1.165 djm 991: if (*activep && options->rekey_limit == -1)
1.249 dtucker 992: options->rekey_limit = val64;
1.198 dtucker 993: if (s != NULL) { /* optional rekey interval present */
994: if (strcmp(s, "none") == 0) {
995: (void)strdelim(&s); /* discard */
996: break;
997: }
998: intptr = &options->rekey_interval;
999: goto parse_time;
1000: }
1.105 markus 1001: break;
1002:
1.17 markus 1003: case oIdentityFile:
1.42 provos 1004: arg = strdelim(&s);
1.40 ho 1005: if (!arg || *arg == '\0')
1.17 markus 1006: fatal("%.200s line %d: Missing argument.", filename, linenum);
1007: if (*activep) {
1.50 markus 1008: intptr = &options->num_identity_files;
1.27 markus 1009: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 1010: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 1011: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.221 djm 1012: add_identity_file(options, NULL,
1013: arg, flags & SSHCONF_USERCONF);
1.17 markus 1014: }
1015: break;
1016:
1.241 djm 1017: case oCertificateFile:
1018: arg = strdelim(&s);
1019: if (!arg || *arg == '\0')
1020: fatal("%.200s line %d: Missing argument.",
1021: filename, linenum);
1022: if (*activep) {
1023: intptr = &options->num_certificate_files;
1024: if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
1025: fatal("%.200s line %d: Too many certificate "
1026: "files specified (max %d).",
1027: filename, linenum,
1028: SSH_MAX_CERTIFICATE_FILES);
1029: }
1030: add_certificate_file(options, arg,
1031: flags & SSHCONF_USERCONF);
1032: }
1033: break;
1034:
1.34 markus 1035: case oXAuthLocation:
1036: charptr=&options->xauth_location;
1037: goto parse_string;
1038:
1.17 markus 1039: case oUser:
1040: charptr = &options->user;
1041: parse_string:
1.42 provos 1042: arg = strdelim(&s);
1.40 ho 1043: if (!arg || *arg == '\0')
1.193 djm 1044: fatal("%.200s line %d: Missing argument.",
1045: filename, linenum);
1.17 markus 1046: if (*activep && *charptr == NULL)
1.38 provos 1047: *charptr = xstrdup(arg);
1.17 markus 1048: break;
1049:
1050: case oGlobalKnownHostsFile:
1.193 djm 1051: cpptr = (char **)&options->system_hostfiles;
1052: uintptr = &options->num_system_hostfiles;
1053: max_entries = SSH_MAX_HOSTS_FILES;
1054: parse_char_array:
1055: if (*activep && *uintptr == 0) {
1056: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1057: if ((*uintptr) >= max_entries)
1058: fatal("%s line %d: "
1059: "too many authorized keys files.",
1060: filename, linenum);
1061: cpptr[(*uintptr)++] = xstrdup(arg);
1062: }
1063: }
1064: return 0;
1.17 markus 1065:
1066: case oUserKnownHostsFile:
1.193 djm 1067: cpptr = (char **)&options->user_hostfiles;
1068: uintptr = &options->num_user_hostfiles;
1069: max_entries = SSH_MAX_HOSTS_FILES;
1070: goto parse_char_array;
1.27 markus 1071:
1.17 markus 1072: case oHostName:
1073: charptr = &options->hostname;
1074: goto parse_string;
1075:
1.52 markus 1076: case oHostKeyAlias:
1077: charptr = &options->host_key_alias;
1078: goto parse_string;
1079:
1.67 markus 1080: case oPreferredAuthentications:
1081: charptr = &options->preferred_authentications;
1082: goto parse_string;
1083:
1.77 markus 1084: case oBindAddress:
1085: charptr = &options->bind_address;
1086: goto parse_string;
1087:
1.282 djm 1088: case oBindInterface:
1089: charptr = &options->bind_interface;
1090: goto parse_string;
1091:
1.183 markus 1092: case oPKCS11Provider:
1093: charptr = &options->pkcs11_provider;
1.86 markus 1094: goto parse_string;
1.85 jakob 1095:
1.17 markus 1096: case oProxyCommand:
1.144 reyk 1097: charptr = &options->proxy_command;
1.257 djm 1098: /* Ignore ProxyCommand if ProxyJump already specified */
1099: if (options->jump_host != NULL)
1100: charptr = &options->jump_host; /* Skip below */
1.144 reyk 1101: parse_command:
1.113 markus 1102: if (s == NULL)
1103: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 1104: len = strspn(s, WHITESPACE "=");
1.17 markus 1105: if (*activep && *charptr == NULL)
1.102 markus 1106: *charptr = xstrdup(s + len);
1.17 markus 1107: return 0;
1108:
1.257 djm 1109: case oProxyJump:
1110: if (s == NULL) {
1111: fatal("%.200s line %d: Missing argument.",
1112: filename, linenum);
1113: }
1114: len = strspn(s, WHITESPACE "=");
1115: if (parse_jump(s + len, options, *activep) == -1) {
1116: fatal("%.200s line %d: Invalid ProxyJump \"%s\"",
1117: filename, linenum, s + len);
1118: }
1119: return 0;
1120:
1.17 markus 1121: case oPort:
1122: intptr = &options->port;
1123: parse_int:
1.42 provos 1124: arg = strdelim(&s);
1.281 dtucker 1125: if ((errstr = atoi_err(arg, &value)) != NULL)
1126: fatal("%s line %d: integer value %s.",
1127: filename, linenum, errstr);
1.17 markus 1128: if (*activep && *intptr == -1)
1129: *intptr = value;
1130: break;
1131:
1132: case oConnectionAttempts:
1133: intptr = &options->connection_attempts;
1134: goto parse_int;
1135:
1.25 markus 1136: case oCiphers:
1.42 provos 1137: arg = strdelim(&s);
1.40 ho 1138: if (!arg || *arg == '\0')
1.32 markus 1139: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1140: if (*arg != '-' && !ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.31 markus 1141: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1142: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1143: if (*activep && options->ciphers == NULL)
1.38 provos 1144: options->ciphers = xstrdup(arg);
1.25 markus 1145: break;
1146:
1.62 markus 1147: case oMacs:
1148: arg = strdelim(&s);
1149: if (!arg || *arg == '\0')
1150: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1151: if (*arg != '-' && !mac_valid(*arg == '+' ? arg + 1 : arg))
1.62 markus 1152: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1153: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1154: if (*activep && options->macs == NULL)
1155: options->macs = xstrdup(arg);
1156: break;
1157:
1.189 djm 1158: case oKexAlgorithms:
1159: arg = strdelim(&s);
1160: if (!arg || *arg == '\0')
1161: fatal("%.200s line %d: Missing argument.",
1162: filename, linenum);
1.268 djm 1163: if (*arg != '-' &&
1164: !kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.189 djm 1165: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1166: filename, linenum, arg ? arg : "<NONE>");
1167: if (*activep && options->kex_algorithms == NULL)
1168: options->kex_algorithms = xstrdup(arg);
1169: break;
1170:
1.76 markus 1171: case oHostKeyAlgorithms:
1.238 markus 1172: charptr = &options->hostkeyalgorithms;
1173: parse_keytypes:
1.76 markus 1174: arg = strdelim(&s);
1175: if (!arg || *arg == '\0')
1.238 markus 1176: fatal("%.200s line %d: Missing argument.",
1177: filename, linenum);
1.268 djm 1178: if (*arg != '-' &&
1179: !sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.238 markus 1180: fatal("%s line %d: Bad key types '%s'.",
1181: filename, linenum, arg ? arg : "<NONE>");
1182: if (*activep && *charptr == NULL)
1183: *charptr = xstrdup(arg);
1.76 markus 1184: break;
1185:
1.17 markus 1186: case oLogLevel:
1.164 dtucker 1187: log_level_ptr = &options->log_level;
1.42 provos 1188: arg = strdelim(&s);
1.38 provos 1189: value = log_level_number(arg);
1.95 markus 1190: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1191: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1192: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1193: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1194: *log_level_ptr = (LogLevel) value;
1.17 markus 1195: break;
1196:
1.271 dtucker 1197: case oLogFacility:
1198: log_facility_ptr = &options->log_facility;
1199: arg = strdelim(&s);
1200: value = log_facility_number(arg);
1201: if (value == SYSLOG_FACILITY_NOT_SET)
1202: fatal("%.200s line %d: unsupported log facility '%s'",
1203: filename, linenum, arg ? arg : "<NONE>");
1204: if (*log_facility_ptr == -1)
1205: *log_facility_ptr = (SyslogFacility) value;
1206: break;
1207:
1.88 stevesk 1208: case oLocalForward:
1.17 markus 1209: case oRemoteForward:
1.168 stevesk 1210: case oDynamicForward:
1.42 provos 1211: arg = strdelim(&s);
1.135 djm 1212: if (arg == NULL || *arg == '\0')
1.88 stevesk 1213: fatal("%.200s line %d: Missing port argument.",
1214: filename, linenum);
1.135 djm 1215:
1.279 markus 1216: remotefwd = (opcode == oRemoteForward);
1217: dynamicfwd = (opcode == oDynamicForward);
1218:
1219: if (!dynamicfwd) {
1.168 stevesk 1220: arg2 = strdelim(&s);
1.279 markus 1221: if (arg2 == NULL || *arg2 == '\0') {
1222: if (remotefwd)
1223: dynamicfwd = 1;
1224: else
1225: fatal("%.200s line %d: Missing target "
1226: "argument.", filename, linenum);
1227: } else {
1228: /* construct a string for parse_forward */
1229: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg,
1230: arg2);
1231: }
1232: }
1233: if (dynamicfwd)
1.168 stevesk 1234: strlcpy(fwdarg, arg, sizeof(fwdarg));
1235:
1.279 markus 1236: if (parse_forward(&fwd, fwdarg, dynamicfwd, remotefwd) == 0)
1.88 stevesk 1237: fatal("%.200s line %d: Bad forwarding specification.",
1238: filename, linenum);
1.135 djm 1239:
1.88 stevesk 1240: if (*activep) {
1.279 markus 1241: if (remotefwd) {
1242: add_remote_forward(options, &fwd);
1243: } else {
1.135 djm 1244: add_local_forward(options, &fwd);
1.279 markus 1245: }
1.88 stevesk 1246: }
1.17 markus 1247: break;
1.71 markus 1248:
1.90 stevesk 1249: case oClearAllForwardings:
1250: intptr = &options->clear_forwardings;
1251: goto parse_flag;
1252:
1.17 markus 1253: case oHost:
1.206 djm 1254: if (cmdline)
1255: fatal("Host directive not supported as a command-line "
1256: "option");
1.17 markus 1257: *activep = 0;
1.191 djm 1258: arg2 = NULL;
1259: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.252 djm 1260: if ((flags & SSHCONF_NEVERMATCH) != 0)
1261: break;
1.191 djm 1262: negated = *arg == '!';
1263: if (negated)
1264: arg++;
1.38 provos 1265: if (match_pattern(host, arg)) {
1.191 djm 1266: if (negated) {
1267: debug("%.200s line %d: Skipping Host "
1268: "block because of negated match "
1269: "for %.100s", filename, linenum,
1270: arg);
1271: *activep = 0;
1272: break;
1273: }
1274: if (!*activep)
1275: arg2 = arg; /* logged below */
1.17 markus 1276: *activep = 1;
1277: }
1.191 djm 1278: }
1279: if (*activep)
1280: debug("%.200s line %d: Applying options for %.100s",
1281: filename, linenum, arg2);
1.42 provos 1282: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1283: return 0;
1284:
1.206 djm 1285: case oMatch:
1286: if (cmdline)
1287: fatal("Host directive not supported as a command-line "
1288: "option");
1.221 djm 1289: value = match_cfg_line(options, &s, pw, host, original_host,
1290: flags & SSHCONF_POSTCANON, filename, linenum);
1.206 djm 1291: if (value < 0)
1292: fatal("%.200s line %d: Bad Match condition", filename,
1293: linenum);
1.252 djm 1294: *activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
1.206 djm 1295: break;
1296:
1.17 markus 1297: case oEscapeChar:
1298: intptr = &options->escape_char;
1.42 provos 1299: arg = strdelim(&s);
1.40 ho 1300: if (!arg || *arg == '\0')
1.17 markus 1301: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.236 djm 1302: if (strcmp(arg, "none") == 0)
1303: value = SSH_ESCAPECHAR_NONE;
1304: else if (arg[1] == '\0')
1305: value = (u_char) arg[0];
1306: else if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1307: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1308: value = (u_char) arg[1] & 31;
1.17 markus 1309: else {
1310: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1311: filename, linenum);
1.17 markus 1312: /* NOTREACHED */
1313: value = 0; /* Avoid compiler warning. */
1314: }
1315: if (*activep && *intptr == -1)
1316: *intptr = value;
1.112 djm 1317: break;
1318:
1319: case oAddressFamily:
1.114 djm 1320: intptr = &options->address_family;
1.207 djm 1321: multistate_ptr = multistate_addressfamily;
1322: goto parse_multistate;
1.17 markus 1323:
1.101 markus 1324: case oEnableSSHKeysign:
1325: intptr = &options->enable_ssh_keysign;
1326: goto parse_flag;
1327:
1.128 markus 1328: case oIdentitiesOnly:
1329: intptr = &options->identities_only;
1330: goto parse_flag;
1331:
1.127 markus 1332: case oServerAliveInterval:
1333: intptr = &options->server_alive_interval;
1334: goto parse_time;
1335:
1336: case oServerAliveCountMax:
1337: intptr = &options->server_alive_count_max;
1338: goto parse_int;
1339:
1.130 djm 1340: case oSendEnv:
1341: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1342: if (strchr(arg, '=') != NULL)
1343: fatal("%s line %d: Invalid environment name.",
1344: filename, linenum);
1.137 djm 1345: if (!*activep)
1346: continue;
1.130 djm 1347: if (options->num_send_env >= MAX_SEND_ENV)
1348: fatal("%s line %d: too many send env.",
1349: filename, linenum);
1350: options->send_env[options->num_send_env++] =
1351: xstrdup(arg);
1352: }
1353: break;
1354:
1.132 djm 1355: case oControlPath:
1356: charptr = &options->control_path;
1357: goto parse_string;
1358:
1359: case oControlMaster:
1360: intptr = &options->control_master;
1.207 djm 1361: multistate_ptr = multistate_controlmaster;
1362: goto parse_multistate;
1.132 djm 1363:
1.187 djm 1364: case oControlPersist:
1365: /* no/false/yes/true, or a time spec */
1366: intptr = &options->control_persist;
1367: arg = strdelim(&s);
1368: if (!arg || *arg == '\0')
1369: fatal("%.200s line %d: Missing ControlPersist"
1370: " argument.", filename, linenum);
1371: value = 0;
1372: value2 = 0; /* timeout */
1373: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1374: value = 0;
1375: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1376: value = 1;
1377: else if ((value2 = convtime(arg)) >= 0)
1378: value = 1;
1379: else
1380: fatal("%.200s line %d: Bad ControlPersist argument.",
1381: filename, linenum);
1382: if (*activep && *intptr == -1) {
1383: *intptr = value;
1384: options->control_persist_timeout = value2;
1385: }
1386: break;
1387:
1.136 djm 1388: case oHashKnownHosts:
1389: intptr = &options->hash_known_hosts;
1390: goto parse_flag;
1391:
1.144 reyk 1392: case oTunnel:
1393: intptr = &options->tun_open;
1.207 djm 1394: multistate_ptr = multistate_tunnel;
1395: goto parse_multistate;
1.144 reyk 1396:
1397: case oTunnelDevice:
1398: arg = strdelim(&s);
1399: if (!arg || *arg == '\0')
1400: fatal("%.200s line %d: Missing argument.", filename, linenum);
1401: value = a2tun(arg, &value2);
1.145 reyk 1402: if (value == SSH_TUNID_ERR)
1.144 reyk 1403: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1404: if (*activep) {
1405: options->tun_local = value;
1406: options->tun_remote = value2;
1407: }
1408: break;
1409:
1410: case oLocalCommand:
1411: charptr = &options->local_command;
1412: goto parse_command;
1413:
1414: case oPermitLocalCommand:
1415: intptr = &options->permit_local_command;
1416: goto parse_flag;
1417:
1.277 bluhm 1418: case oRemoteCommand:
1419: charptr = &options->remote_command;
1420: goto parse_command;
1421:
1.167 grunk 1422: case oVisualHostKey:
1423: intptr = &options->visual_host_key;
1424: goto parse_flag;
1425:
1.252 djm 1426: case oInclude:
1427: if (cmdline)
1428: fatal("Include directive not supported as a "
1429: "command-line option");
1430: value = 0;
1431: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1432: /*
1433: * Ensure all paths are anchored. User configuration
1434: * files may begin with '~/' but system configurations
1435: * must not. If the path is relative, then treat it
1436: * as living in ~/.ssh for user configurations or
1437: * /etc/ssh for system ones.
1438: */
1439: if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0)
1440: fatal("%.200s line %d: bad include path %s.",
1441: filename, linenum, arg);
1442: if (*arg != '/' && *arg != '~') {
1443: xasprintf(&arg2, "%s/%s",
1444: (flags & SSHCONF_USERCONF) ?
1445: "~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
1446: } else
1447: arg2 = xstrdup(arg);
1448: memset(&gl, 0, sizeof(gl));
1449: r = glob(arg2, GLOB_TILDE, NULL, &gl);
1450: if (r == GLOB_NOMATCH) {
1451: debug("%.200s line %d: include %s matched no "
1452: "files",filename, linenum, arg2);
1.269 dtucker 1453: free(arg2);
1.252 djm 1454: continue;
1455: } else if (r != 0 || gl.gl_pathc < 0)
1456: fatal("%.200s line %d: glob failed for %s.",
1457: filename, linenum, arg2);
1458: free(arg2);
1459: oactive = *activep;
1460: for (i = 0; i < (u_int)gl.gl_pathc; i++) {
1461: debug3("%.200s line %d: Including file %s "
1462: "depth %d%s", filename, linenum,
1463: gl.gl_pathv[i], depth,
1464: oactive ? "" : " (parse only)");
1465: r = read_config_file_depth(gl.gl_pathv[i],
1466: pw, host, original_host, options,
1467: flags | SSHCONF_CHECKPERM |
1468: (oactive ? 0 : SSHCONF_NEVERMATCH),
1469: activep, depth + 1);
1.264 djm 1470: if (r != 1 && errno != ENOENT) {
1.263 djm 1471: fatal("Can't open user config file "
1472: "%.100s: %.100s", gl.gl_pathv[i],
1473: strerror(errno));
1474: }
1.252 djm 1475: /*
1476: * don't let Match in includes clobber the
1477: * containing file's Match state.
1478: */
1479: *activep = oactive;
1480: if (r != 1)
1481: value = -1;
1482: }
1483: globfree(&gl);
1484: }
1485: if (value != 0)
1486: return value;
1487: break;
1488:
1.190 djm 1489: case oIPQoS:
1490: arg = strdelim(&s);
1491: if ((value = parse_ipqos(arg)) == -1)
1492: fatal("%s line %d: Bad IPQoS value: %s",
1493: filename, linenum, arg);
1494: arg = strdelim(&s);
1495: if (arg == NULL)
1496: value2 = value;
1497: else if ((value2 = parse_ipqos(arg)) == -1)
1498: fatal("%s line %d: Bad IPQoS value: %s",
1499: filename, linenum, arg);
1500: if (*activep) {
1501: options->ip_qos_interactive = value;
1502: options->ip_qos_bulk = value2;
1503: }
1504: break;
1505:
1.192 djm 1506: case oRequestTTY:
1507: intptr = &options->request_tty;
1.207 djm 1508: multistate_ptr = multistate_requesttty;
1509: goto parse_multistate;
1.192 djm 1510:
1.199 djm 1511: case oIgnoreUnknown:
1512: charptr = &options->ignored_unknown;
1513: goto parse_string;
1514:
1.205 djm 1515: case oProxyUseFdpass:
1516: intptr = &options->proxy_use_fdpass;
1517: goto parse_flag;
1518:
1.208 djm 1519: case oCanonicalDomains:
1520: value = options->num_canonical_domains != 0;
1521: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.280 millert 1522: if (!valid_domain(arg, 1, &errstr)) {
1523: fatal("%s line %d: %s", filename, linenum,
1524: errstr);
1525: }
1.208 djm 1526: if (!*activep || value)
1527: continue;
1528: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1529: fatal("%s line %d: too many hostname suffixes.",
1530: filename, linenum);
1531: options->canonical_domains[
1532: options->num_canonical_domains++] = xstrdup(arg);
1533: }
1534: break;
1535:
1.209 djm 1536: case oCanonicalizePermittedCNAMEs:
1.208 djm 1537: value = options->num_permitted_cnames != 0;
1538: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1539: /* Either '*' for everything or 'list:list' */
1540: if (strcmp(arg, "*") == 0)
1541: arg2 = arg;
1542: else {
1543: lowercase(arg);
1544: if ((arg2 = strchr(arg, ':')) == NULL ||
1545: arg2[1] == '\0') {
1546: fatal("%s line %d: "
1547: "Invalid permitted CNAME \"%s\"",
1548: filename, linenum, arg);
1549: }
1550: *arg2 = '\0';
1551: arg2++;
1552: }
1553: if (!*activep || value)
1554: continue;
1555: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1556: fatal("%s line %d: too many permitted CNAMEs.",
1557: filename, linenum);
1558: cname = options->permitted_cnames +
1559: options->num_permitted_cnames++;
1560: cname->source_list = xstrdup(arg);
1561: cname->target_list = xstrdup(arg2);
1562: }
1563: break;
1564:
1.209 djm 1565: case oCanonicalizeHostname:
1566: intptr = &options->canonicalize_hostname;
1567: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1568: goto parse_multistate;
1569:
1.209 djm 1570: case oCanonicalizeMaxDots:
1571: intptr = &options->canonicalize_max_dots;
1.208 djm 1572: goto parse_int;
1573:
1.209 djm 1574: case oCanonicalizeFallbackLocal:
1575: intptr = &options->canonicalize_fallback_local;
1.208 djm 1576: goto parse_flag;
1577:
1.220 millert 1578: case oStreamLocalBindMask:
1579: arg = strdelim(&s);
1580: if (!arg || *arg == '\0')
1581: fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum);
1582: /* Parse mode in octal format */
1583: value = strtol(arg, &endofnumber, 8);
1584: if (arg == endofnumber || value < 0 || value > 0777)
1585: fatal("%.200s line %d: Bad mask.", filename, linenum);
1586: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1587: break;
1588:
1589: case oStreamLocalBindUnlink:
1590: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1591: goto parse_flag;
1592:
1.223 djm 1593: case oRevokedHostKeys:
1594: charptr = &options->revoked_host_keys;
1595: goto parse_string;
1596:
1.224 djm 1597: case oFingerprintHash:
1.225 djm 1598: intptr = &options->fingerprint_hash;
1.224 djm 1599: arg = strdelim(&s);
1600: if (!arg || *arg == '\0')
1601: fatal("%.200s line %d: Missing argument.",
1602: filename, linenum);
1603: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1604: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1605: filename, linenum, arg);
1.225 djm 1606: if (*activep && *intptr == -1)
1607: *intptr = value;
1.224 djm 1608: break;
1609:
1.229 djm 1610: case oUpdateHostkeys:
1611: intptr = &options->update_hostkeys;
1.232 djm 1612: multistate_ptr = multistate_yesnoask;
1613: goto parse_multistate;
1.229 djm 1614:
1.230 djm 1615: case oHostbasedKeyTypes:
1616: charptr = &options->hostbased_key_types;
1.238 markus 1617: goto parse_keytypes;
1618:
1619: case oPubkeyAcceptedKeyTypes:
1620: charptr = &options->pubkey_key_types;
1621: goto parse_keytypes;
1.230 djm 1622:
1.246 jcs 1623: case oAddKeysToAgent:
1624: intptr = &options->add_keys_to_agent;
1625: multistate_ptr = multistate_yesnoaskconfirm;
1626: goto parse_multistate;
1627:
1.253 markus 1628: case oIdentityAgent:
1629: charptr = &options->identity_agent;
1630: goto parse_string;
1631:
1.96 markus 1632: case oDeprecated:
1.98 markus 1633: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1634: filename, linenum, keyword);
1.98 markus 1635: return 0;
1.96 markus 1636:
1.110 jakob 1637: case oUnsupported:
1638: error("%s line %d: Unsupported option \"%s\"",
1639: filename, linenum, keyword);
1640: return 0;
1641:
1.17 markus 1642: default:
1.221 djm 1643: fatal("%s: Unimplemented opcode %d", __func__, opcode);
1.17 markus 1644: }
1645:
1646: /* Check that there is no garbage at end of line. */
1.57 djm 1647: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1648: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1649: filename, linenum, arg);
1.39 ho 1650: }
1.17 markus 1651: return 0;
1.1 deraadt 1652: }
1653:
1.19 markus 1654: /*
1655: * Reads the config file and modifies the options accordingly. Options
1656: * should already be initialized before this call. This never returns if
1.89 stevesk 1657: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1658: */
1.89 stevesk 1659: int
1.206 djm 1660: read_config_file(const char *filename, struct passwd *pw, const char *host,
1.221 djm 1661: const char *original_host, Options *options, int flags)
1.1 deraadt 1662: {
1.252 djm 1663: int active = 1;
1664:
1665: return read_config_file_depth(filename, pw, host, original_host,
1666: options, flags, &active, 0);
1667: }
1668:
1669: #define READCONF_MAX_DEPTH 16
1670: static int
1671: read_config_file_depth(const char *filename, struct passwd *pw,
1672: const char *host, const char *original_host, Options *options,
1673: int flags, int *activep, int depth)
1674: {
1.17 markus 1675: FILE *f;
1.270 djm 1676: char line[4096];
1.252 djm 1677: int linenum;
1.17 markus 1678: int bad_options = 0;
1679:
1.252 djm 1680: if (depth < 0 || depth > READCONF_MAX_DEPTH)
1681: fatal("Too many recursive configuration includes");
1682:
1.129 djm 1683: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1684: return 0;
1.129 djm 1685:
1.196 dtucker 1686: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1687: struct stat sb;
1.134 deraadt 1688:
1.131 dtucker 1689: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1690: fatal("fstat %s: %s", filename, strerror(errno));
1691: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1692: (sb.st_mode & 022) != 0))
1.129 djm 1693: fatal("Bad owner or permissions on %s", filename);
1694: }
1.17 markus 1695:
1696: debug("Reading configuration data %.200s", filename);
1697:
1.19 markus 1698: /*
1699: * Mark that we are now processing the options. This flag is turned
1700: * on/off by Host specifications.
1701: */
1.17 markus 1702: linenum = 0;
1703: while (fgets(line, sizeof(line), f)) {
1704: /* Update line number counter. */
1705: linenum++;
1.270 djm 1706: if (strlen(line) == sizeof(line) - 1)
1707: fatal("%s line %d too long", filename, linenum);
1.252 djm 1708: if (process_config_line_depth(options, pw, host, original_host,
1709: line, filename, linenum, activep, flags, depth) != 0)
1.17 markus 1710: bad_options++;
1711: }
1712: fclose(f);
1713: if (bad_options > 0)
1.64 millert 1714: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1715: filename, bad_options);
1.89 stevesk 1716: return 1;
1.1 deraadt 1717: }
1718:
1.218 djm 1719: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1720: int
1721: option_clear_or_none(const char *o)
1722: {
1723: return o == NULL || strcasecmp(o, "none") == 0;
1724: }
1725:
1.19 markus 1726: /*
1727: * Initializes options to special values that indicate that they have not yet
1728: * been set. Read_config_file will only set options with this value. Options
1729: * are processed in the following order: command line, user config file,
1730: * system config file. Last, fill_default_options is called.
1731: */
1.1 deraadt 1732:
1.26 markus 1733: void
1.17 markus 1734: initialize_options(Options * options)
1.1 deraadt 1735: {
1.17 markus 1736: memset(options, 'X', sizeof(*options));
1737: options->forward_agent = -1;
1738: options->forward_x11 = -1;
1.123 markus 1739: options->forward_x11_trusted = -1;
1.186 djm 1740: options->forward_x11_timeout = -1;
1.255 dtucker 1741: options->stdio_forward_host = NULL;
1742: options->stdio_forward_port = 0;
1.256 dtucker 1743: options->clear_forwardings = -1;
1.153 markus 1744: options->exit_on_forward_failure = -1;
1.34 markus 1745: options->xauth_location = NULL;
1.220 millert 1746: options->fwd_opts.gateway_ports = -1;
1747: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
1748: options->fwd_opts.streamlocal_bind_unlink = -1;
1.17 markus 1749: options->use_privileged_port = -1;
1.50 markus 1750: options->pubkey_authentication = -1;
1.78 markus 1751: options->challenge_response_authentication = -1;
1.118 markus 1752: options->gss_authentication = -1;
1753: options->gss_deleg_creds = -1;
1.17 markus 1754: options->password_authentication = -1;
1.48 markus 1755: options->kbd_interactive_authentication = -1;
1756: options->kbd_interactive_devices = NULL;
1.72 markus 1757: options->hostbased_authentication = -1;
1.17 markus 1758: options->batch_mode = -1;
1759: options->check_host_ip = -1;
1760: options->strict_host_key_checking = -1;
1761: options->compression = -1;
1.126 markus 1762: options->tcp_keep_alive = -1;
1.17 markus 1763: options->port = -1;
1.114 djm 1764: options->address_family = -1;
1.17 markus 1765: options->connection_attempts = -1;
1.111 djm 1766: options->connection_timeout = -1;
1.17 markus 1767: options->number_of_password_prompts = -1;
1.25 markus 1768: options->ciphers = NULL;
1.62 markus 1769: options->macs = NULL;
1.189 djm 1770: options->kex_algorithms = NULL;
1.76 markus 1771: options->hostkeyalgorithms = NULL;
1.17 markus 1772: options->num_identity_files = 0;
1.241 djm 1773: options->num_certificate_files = 0;
1.17 markus 1774: options->hostname = NULL;
1.52 markus 1775: options->host_key_alias = NULL;
1.17 markus 1776: options->proxy_command = NULL;
1.257 djm 1777: options->jump_user = NULL;
1778: options->jump_host = NULL;
1779: options->jump_port = -1;
1780: options->jump_extra = NULL;
1.17 markus 1781: options->user = NULL;
1782: options->escape_char = -1;
1.193 djm 1783: options->num_system_hostfiles = 0;
1784: options->num_user_hostfiles = 0;
1.185 djm 1785: options->local_forwards = NULL;
1.17 markus 1786: options->num_local_forwards = 0;
1.185 djm 1787: options->remote_forwards = NULL;
1.17 markus 1788: options->num_remote_forwards = 0;
1.271 dtucker 1789: options->log_facility = SYSLOG_FACILITY_NOT_SET;
1.95 markus 1790: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1791: options->preferred_authentications = NULL;
1.77 markus 1792: options->bind_address = NULL;
1.282 djm 1793: options->bind_interface = NULL;
1.183 markus 1794: options->pkcs11_provider = NULL;
1.101 markus 1795: options->enable_ssh_keysign = - 1;
1.91 markus 1796: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1797: options->identities_only = - 1;
1.105 markus 1798: options->rekey_limit = - 1;
1.198 dtucker 1799: options->rekey_interval = -1;
1.107 jakob 1800: options->verify_host_key_dns = -1;
1.127 markus 1801: options->server_alive_interval = -1;
1802: options->server_alive_count_max = -1;
1.130 djm 1803: options->num_send_env = 0;
1.132 djm 1804: options->control_path = NULL;
1805: options->control_master = -1;
1.187 djm 1806: options->control_persist = -1;
1807: options->control_persist_timeout = 0;
1.136 djm 1808: options->hash_known_hosts = -1;
1.144 reyk 1809: options->tun_open = -1;
1810: options->tun_local = -1;
1811: options->tun_remote = -1;
1812: options->local_command = NULL;
1813: options->permit_local_command = -1;
1.277 bluhm 1814: options->remote_command = NULL;
1.246 jcs 1815: options->add_keys_to_agent = -1;
1.253 markus 1816: options->identity_agent = NULL;
1.167 grunk 1817: options->visual_host_key = -1;
1.190 djm 1818: options->ip_qos_interactive = -1;
1819: options->ip_qos_bulk = -1;
1.192 djm 1820: options->request_tty = -1;
1.205 djm 1821: options->proxy_use_fdpass = -1;
1.199 djm 1822: options->ignored_unknown = NULL;
1.208 djm 1823: options->num_canonical_domains = 0;
1824: options->num_permitted_cnames = 0;
1.209 djm 1825: options->canonicalize_max_dots = -1;
1826: options->canonicalize_fallback_local = -1;
1827: options->canonicalize_hostname = -1;
1.223 djm 1828: options->revoked_host_keys = NULL;
1.224 djm 1829: options->fingerprint_hash = -1;
1.229 djm 1830: options->update_hostkeys = -1;
1.230 djm 1831: options->hostbased_key_types = NULL;
1.238 markus 1832: options->pubkey_key_types = NULL;
1.1 deraadt 1833: }
1834:
1.19 markus 1835: /*
1.218 djm 1836: * A petite version of fill_default_options() that just fills the options
1837: * needed for hostname canonicalization to proceed.
1838: */
1839: void
1840: fill_default_options_for_canonicalization(Options *options)
1841: {
1842: if (options->canonicalize_max_dots == -1)
1843: options->canonicalize_max_dots = 1;
1844: if (options->canonicalize_fallback_local == -1)
1845: options->canonicalize_fallback_local = 1;
1846: if (options->canonicalize_hostname == -1)
1847: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1848: }
1849:
1850: /*
1.19 markus 1851: * Called after processing other sources of option data, this fills those
1852: * options for which no value has been specified with their default values.
1853: */
1.26 markus 1854: void
1.17 markus 1855: fill_default_options(Options * options)
1.1 deraadt 1856: {
1.17 markus 1857: if (options->forward_agent == -1)
1.33 markus 1858: options->forward_agent = 0;
1.17 markus 1859: if (options->forward_x11 == -1)
1.23 markus 1860: options->forward_x11 = 0;
1.123 markus 1861: if (options->forward_x11_trusted == -1)
1862: options->forward_x11_trusted = 0;
1.186 djm 1863: if (options->forward_x11_timeout == -1)
1864: options->forward_x11_timeout = 1200;
1.256 dtucker 1865: /*
1866: * stdio forwarding (-W) changes the default for these but we defer
1867: * setting the values so they can be overridden.
1868: */
1.153 markus 1869: if (options->exit_on_forward_failure == -1)
1.256 dtucker 1870: options->exit_on_forward_failure =
1871: options->stdio_forward_host != NULL ? 1 : 0;
1872: if (options->clear_forwardings == -1)
1873: options->clear_forwardings =
1874: options->stdio_forward_host != NULL ? 1 : 0;
1875: if (options->clear_forwardings == 1)
1876: clear_forwardings(options);
1877:
1.34 markus 1878: if (options->xauth_location == NULL)
1.80 markus 1879: options->xauth_location = _PATH_XAUTH;
1.220 millert 1880: if (options->fwd_opts.gateway_ports == -1)
1881: options->fwd_opts.gateway_ports = 0;
1882: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
1883: options->fwd_opts.streamlocal_bind_mask = 0177;
1884: if (options->fwd_opts.streamlocal_bind_unlink == -1)
1885: options->fwd_opts.streamlocal_bind_unlink = 0;
1.17 markus 1886: if (options->use_privileged_port == -1)
1.65 markus 1887: options->use_privileged_port = 0;
1.50 markus 1888: if (options->pubkey_authentication == -1)
1889: options->pubkey_authentication = 1;
1.78 markus 1890: if (options->challenge_response_authentication == -1)
1.83 markus 1891: options->challenge_response_authentication = 1;
1.118 markus 1892: if (options->gss_authentication == -1)
1.122 markus 1893: options->gss_authentication = 0;
1.118 markus 1894: if (options->gss_deleg_creds == -1)
1895: options->gss_deleg_creds = 0;
1.17 markus 1896: if (options->password_authentication == -1)
1897: options->password_authentication = 1;
1.48 markus 1898: if (options->kbd_interactive_authentication == -1)
1.59 markus 1899: options->kbd_interactive_authentication = 1;
1.72 markus 1900: if (options->hostbased_authentication == -1)
1901: options->hostbased_authentication = 0;
1.17 markus 1902: if (options->batch_mode == -1)
1903: options->batch_mode = 0;
1904: if (options->check_host_ip == -1)
1905: options->check_host_ip = 1;
1906: if (options->strict_host_key_checking == -1)
1.278 djm 1907: options->strict_host_key_checking = SSH_STRICT_HOSTKEY_ASK;
1.17 markus 1908: if (options->compression == -1)
1909: options->compression = 0;
1.126 markus 1910: if (options->tcp_keep_alive == -1)
1911: options->tcp_keep_alive = 1;
1.17 markus 1912: if (options->port == -1)
1913: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1914: if (options->address_family == -1)
1915: options->address_family = AF_UNSPEC;
1.17 markus 1916: if (options->connection_attempts == -1)
1.84 markus 1917: options->connection_attempts = 1;
1.17 markus 1918: if (options->number_of_password_prompts == -1)
1919: options->number_of_password_prompts = 3;
1.76 markus 1920: /* options->hostkeyalgorithms, default set in myproposals.h */
1.246 jcs 1921: if (options->add_keys_to_agent == -1)
1922: options->add_keys_to_agent = 0;
1.17 markus 1923: if (options->num_identity_files == 0) {
1.273 djm 1924: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_RSA, 0);
1925: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_DSA, 0);
1926: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_ECDSA, 0);
1927: add_identity_file(options, "~/",
1928: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.283 ! markus 1929: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_XMSS, 0);
1.27 markus 1930: }
1.17 markus 1931: if (options->escape_char == -1)
1932: options->escape_char = '~';
1.193 djm 1933: if (options->num_system_hostfiles == 0) {
1934: options->system_hostfiles[options->num_system_hostfiles++] =
1935: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1936: options->system_hostfiles[options->num_system_hostfiles++] =
1937: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1938: }
1939: if (options->num_user_hostfiles == 0) {
1940: options->user_hostfiles[options->num_user_hostfiles++] =
1941: xstrdup(_PATH_SSH_USER_HOSTFILE);
1942: options->user_hostfiles[options->num_user_hostfiles++] =
1943: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1944: }
1.95 markus 1945: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1946: options->log_level = SYSLOG_LEVEL_INFO;
1.271 dtucker 1947: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1948: options->log_facility = SYSLOG_FACILITY_USER;
1.91 markus 1949: if (options->no_host_authentication_for_localhost == - 1)
1950: options->no_host_authentication_for_localhost = 0;
1.128 markus 1951: if (options->identities_only == -1)
1952: options->identities_only = 0;
1.101 markus 1953: if (options->enable_ssh_keysign == -1)
1954: options->enable_ssh_keysign = 0;
1.105 markus 1955: if (options->rekey_limit == -1)
1956: options->rekey_limit = 0;
1.198 dtucker 1957: if (options->rekey_interval == -1)
1958: options->rekey_interval = 0;
1.107 jakob 1959: if (options->verify_host_key_dns == -1)
1960: options->verify_host_key_dns = 0;
1.127 markus 1961: if (options->server_alive_interval == -1)
1962: options->server_alive_interval = 0;
1963: if (options->server_alive_count_max == -1)
1964: options->server_alive_count_max = 3;
1.132 djm 1965: if (options->control_master == -1)
1966: options->control_master = 0;
1.187 djm 1967: if (options->control_persist == -1) {
1968: options->control_persist = 0;
1969: options->control_persist_timeout = 0;
1970: }
1.136 djm 1971: if (options->hash_known_hosts == -1)
1972: options->hash_known_hosts = 0;
1.144 reyk 1973: if (options->tun_open == -1)
1.145 reyk 1974: options->tun_open = SSH_TUNMODE_NO;
1975: if (options->tun_local == -1)
1976: options->tun_local = SSH_TUNID_ANY;
1977: if (options->tun_remote == -1)
1978: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1979: if (options->permit_local_command == -1)
1980: options->permit_local_command = 0;
1.167 grunk 1981: if (options->visual_host_key == -1)
1982: options->visual_host_key = 0;
1.190 djm 1983: if (options->ip_qos_interactive == -1)
1984: options->ip_qos_interactive = IPTOS_LOWDELAY;
1985: if (options->ip_qos_bulk == -1)
1986: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1987: if (options->request_tty == -1)
1988: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 1989: if (options->proxy_use_fdpass == -1)
1990: options->proxy_use_fdpass = 0;
1.209 djm 1991: if (options->canonicalize_max_dots == -1)
1992: options->canonicalize_max_dots = 1;
1993: if (options->canonicalize_fallback_local == -1)
1994: options->canonicalize_fallback_local = 1;
1995: if (options->canonicalize_hostname == -1)
1996: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.224 djm 1997: if (options->fingerprint_hash == -1)
1998: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.229 djm 1999: if (options->update_hostkeys == -1)
1.231 djm 2000: options->update_hostkeys = 0;
1.239 djm 2001: if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 ||
2002: kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 ||
2003: kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 ||
2004: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2005: &options->hostbased_key_types) != 0 ||
2006: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2007: &options->pubkey_key_types) != 0)
2008: fatal("%s: kex_assemble_names failed", __func__);
1.224 djm 2009:
1.207 djm 2010: #define CLEAR_ON_NONE(v) \
2011: do { \
1.218 djm 2012: if (option_clear_or_none(v)) { \
1.207 djm 2013: free(v); \
2014: v = NULL; \
2015: } \
2016: } while(0)
2017: CLEAR_ON_NONE(options->local_command);
1.277 bluhm 2018: CLEAR_ON_NONE(options->remote_command);
1.207 djm 2019: CLEAR_ON_NONE(options->proxy_command);
2020: CLEAR_ON_NONE(options->control_path);
1.223 djm 2021: CLEAR_ON_NONE(options->revoked_host_keys);
1.254 markus 2022: /* options->identity_agent distinguishes NULL from 'none' */
1.17 markus 2023: /* options->user will be set in the main program if appropriate */
2024: /* options->hostname will be set in the main program if appropriate */
1.52 markus 2025: /* options->host_key_alias should not be set by default */
1.67 markus 2026: /* options->preferred_authentications will be set in ssh */
1.135 djm 2027: }
2028:
1.220 millert 2029: struct fwdarg {
2030: char *arg;
2031: int ispath;
2032: };
2033:
2034: /*
2035: * parse_fwd_field
2036: * parses the next field in a port forwarding specification.
2037: * sets fwd to the parsed field and advances p past the colon
2038: * or sets it to NULL at end of string.
2039: * returns 0 on success, else non-zero.
2040: */
2041: static int
2042: parse_fwd_field(char **p, struct fwdarg *fwd)
2043: {
2044: char *ep, *cp = *p;
2045: int ispath = 0;
2046:
2047: if (*cp == '\0') {
2048: *p = NULL;
2049: return -1; /* end of string */
2050: }
2051:
2052: /*
2053: * A field escaped with square brackets is used literally.
2054: * XXX - allow ']' to be escaped via backslash?
2055: */
2056: if (*cp == '[') {
2057: /* find matching ']' */
2058: for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
2059: if (*ep == '/')
2060: ispath = 1;
2061: }
2062: /* no matching ']' or not at end of field. */
2063: if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
2064: return -1;
2065: /* NUL terminate the field and advance p past the colon */
2066: *ep++ = '\0';
2067: if (*ep != '\0')
2068: *ep++ = '\0';
2069: fwd->arg = cp + 1;
2070: fwd->ispath = ispath;
2071: *p = ep;
2072: return 0;
2073: }
2074:
2075: for (cp = *p; *cp != '\0'; cp++) {
2076: switch (*cp) {
2077: case '\\':
2078: memmove(cp, cp + 1, strlen(cp + 1) + 1);
1.237 djm 2079: if (*cp == '\0')
2080: return -1;
1.220 millert 2081: break;
2082: case '/':
2083: ispath = 1;
2084: break;
2085: case ':':
2086: *cp++ = '\0';
2087: goto done;
2088: }
2089: }
2090: done:
2091: fwd->arg = *p;
2092: fwd->ispath = ispath;
2093: *p = cp;
2094: return 0;
2095: }
2096:
1.135 djm 2097: /*
2098: * parse_forward
2099: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 2100: * dynamicfwd == 0
1.220 millert 2101: * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
2102: * listenpath:connectpath
1.168 stevesk 2103: * dynamicfwd == 1
2104: * [listenhost:]listenport
1.135 djm 2105: * returns number of arguments parsed or zero on error
2106: */
2107: int
1.220 millert 2108: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 2109: {
1.220 millert 2110: struct fwdarg fwdargs[4];
2111: char *p, *cp;
1.135 djm 2112: int i;
2113:
1.220 millert 2114: memset(fwd, 0, sizeof(*fwd));
2115: memset(fwdargs, 0, sizeof(fwdargs));
1.135 djm 2116:
2117: cp = p = xstrdup(fwdspec);
2118:
2119: /* skip leading spaces */
1.214 deraadt 2120: while (isspace((u_char)*cp))
1.135 djm 2121: cp++;
2122:
1.220 millert 2123: for (i = 0; i < 4; ++i) {
2124: if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.135 djm 2125: break;
1.220 millert 2126: }
1.135 djm 2127:
1.170 stevesk 2128: /* Check for trailing garbage */
1.220 millert 2129: if (cp != NULL && *cp != '\0') {
1.135 djm 2130: i = 0; /* failure */
1.220 millert 2131: }
1.135 djm 2132:
2133: switch (i) {
1.168 stevesk 2134: case 1:
1.220 millert 2135: if (fwdargs[0].ispath) {
2136: fwd->listen_path = xstrdup(fwdargs[0].arg);
2137: fwd->listen_port = PORT_STREAMLOCAL;
2138: } else {
2139: fwd->listen_host = NULL;
2140: fwd->listen_port = a2port(fwdargs[0].arg);
2141: }
1.168 stevesk 2142: fwd->connect_host = xstrdup("socks");
2143: break;
2144:
2145: case 2:
1.220 millert 2146: if (fwdargs[0].ispath && fwdargs[1].ispath) {
2147: fwd->listen_path = xstrdup(fwdargs[0].arg);
2148: fwd->listen_port = PORT_STREAMLOCAL;
2149: fwd->connect_path = xstrdup(fwdargs[1].arg);
2150: fwd->connect_port = PORT_STREAMLOCAL;
2151: } else if (fwdargs[1].ispath) {
2152: fwd->listen_host = NULL;
2153: fwd->listen_port = a2port(fwdargs[0].arg);
2154: fwd->connect_path = xstrdup(fwdargs[1].arg);
2155: fwd->connect_port = PORT_STREAMLOCAL;
2156: } else {
2157: fwd->listen_host = xstrdup(fwdargs[0].arg);
2158: fwd->listen_port = a2port(fwdargs[1].arg);
2159: fwd->connect_host = xstrdup("socks");
2160: }
1.168 stevesk 2161: break;
2162:
1.135 djm 2163: case 3:
1.220 millert 2164: if (fwdargs[0].ispath) {
2165: fwd->listen_path = xstrdup(fwdargs[0].arg);
2166: fwd->listen_port = PORT_STREAMLOCAL;
2167: fwd->connect_host = xstrdup(fwdargs[1].arg);
2168: fwd->connect_port = a2port(fwdargs[2].arg);
2169: } else if (fwdargs[2].ispath) {
2170: fwd->listen_host = xstrdup(fwdargs[0].arg);
2171: fwd->listen_port = a2port(fwdargs[1].arg);
2172: fwd->connect_path = xstrdup(fwdargs[2].arg);
2173: fwd->connect_port = PORT_STREAMLOCAL;
2174: } else {
2175: fwd->listen_host = NULL;
2176: fwd->listen_port = a2port(fwdargs[0].arg);
2177: fwd->connect_host = xstrdup(fwdargs[1].arg);
2178: fwd->connect_port = a2port(fwdargs[2].arg);
2179: }
1.135 djm 2180: break;
2181:
2182: case 4:
1.220 millert 2183: fwd->listen_host = xstrdup(fwdargs[0].arg);
2184: fwd->listen_port = a2port(fwdargs[1].arg);
2185: fwd->connect_host = xstrdup(fwdargs[2].arg);
2186: fwd->connect_port = a2port(fwdargs[3].arg);
1.135 djm 2187: break;
2188: default:
2189: i = 0; /* failure */
2190: }
2191:
1.202 djm 2192: free(p);
1.135 djm 2193:
1.168 stevesk 2194: if (dynamicfwd) {
2195: if (!(i == 1 || i == 2))
2196: goto fail_free;
2197: } else {
1.220 millert 2198: if (!(i == 3 || i == 4)) {
2199: if (fwd->connect_path == NULL &&
2200: fwd->listen_path == NULL)
2201: goto fail_free;
2202: }
2203: if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.168 stevesk 2204: goto fail_free;
2205: }
2206:
1.220 millert 2207: if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
2208: (!remotefwd && fwd->listen_port == 0))
1.135 djm 2209: goto fail_free;
2210: if (fwd->connect_host != NULL &&
2211: strlen(fwd->connect_host) >= NI_MAXHOST)
2212: goto fail_free;
1.220 millert 2213: /* XXX - if connecting to a remote socket, max sun len may not match this host */
2214: if (fwd->connect_path != NULL &&
2215: strlen(fwd->connect_path) >= PATH_MAX_SUN)
2216: goto fail_free;
1.176 djm 2217: if (fwd->listen_host != NULL &&
2218: strlen(fwd->listen_host) >= NI_MAXHOST)
2219: goto fail_free;
1.220 millert 2220: if (fwd->listen_path != NULL &&
2221: strlen(fwd->listen_path) >= PATH_MAX_SUN)
2222: goto fail_free;
1.135 djm 2223:
2224: return (i);
2225:
2226: fail_free:
1.202 djm 2227: free(fwd->connect_host);
2228: fwd->connect_host = NULL;
1.220 millert 2229: free(fwd->connect_path);
2230: fwd->connect_path = NULL;
1.202 djm 2231: free(fwd->listen_host);
2232: fwd->listen_host = NULL;
1.220 millert 2233: free(fwd->listen_path);
2234: fwd->listen_path = NULL;
1.135 djm 2235: return (0);
1.221 djm 2236: }
2237:
1.257 djm 2238: int
2239: parse_jump(const char *s, Options *o, int active)
2240: {
2241: char *orig, *sdup, *cp;
2242: char *host = NULL, *user = NULL;
1.258 naddy 2243: int ret = -1, port = -1, first;
1.257 djm 2244:
2245: active &= o->proxy_command == NULL && o->jump_host == NULL;
2246:
2247: orig = sdup = xstrdup(s);
1.258 naddy 2248: first = active;
1.259 djm 2249: do {
2250: if ((cp = strrchr(sdup, ',')) == NULL)
2251: cp = sdup; /* last */
2252: else
2253: *cp++ = '\0';
2254:
1.258 naddy 2255: if (first) {
1.257 djm 2256: /* First argument and configuration is active */
1.280 millert 2257: if (parse_ssh_uri(cp, &user, &host, &port) == -1 ||
2258: parse_user_host_port(cp, &user, &host, &port) != 0)
1.257 djm 2259: goto out;
2260: } else {
2261: /* Subsequent argument or inactive configuration */
1.280 millert 2262: if (parse_ssh_uri(cp, NULL, NULL, NULL) == -1 ||
2263: parse_user_host_port(cp, NULL, NULL, NULL) != 0)
1.257 djm 2264: goto out;
2265: }
1.258 naddy 2266: first = 0; /* only check syntax for subsequent hosts */
1.259 djm 2267: } while (cp != sdup);
1.257 djm 2268: /* success */
1.258 naddy 2269: if (active) {
2270: o->jump_user = user;
2271: o->jump_host = host;
2272: o->jump_port = port;
2273: o->proxy_command = xstrdup("none");
2274: user = host = NULL;
1.259 djm 2275: if ((cp = strrchr(s, ',')) != NULL && cp != s) {
2276: o->jump_extra = xstrdup(s);
2277: o->jump_extra[cp - s] = '\0';
2278: }
1.258 naddy 2279: }
1.257 djm 2280: ret = 0;
2281: out:
1.258 naddy 2282: free(orig);
1.257 djm 2283: free(user);
2284: free(host);
2285: return ret;
1.280 millert 2286: }
2287:
2288: int
2289: parse_ssh_uri(const char *uri, char **userp, char **hostp, int *portp)
2290: {
2291: char *path;
2292: int r;
2293:
2294: r = parse_uri("ssh", uri, userp, hostp, portp, &path);
2295: if (r == 0 && path != NULL)
2296: r = -1; /* path not allowed */
2297: return r;
1.257 djm 2298: }
2299:
1.221 djm 2300: /* XXX the following is a near-vebatim copy from servconf.c; refactor */
2301: static const char *
2302: fmt_multistate_int(int val, const struct multistate *m)
2303: {
2304: u_int i;
2305:
2306: for (i = 0; m[i].key != NULL; i++) {
2307: if (m[i].value == val)
2308: return m[i].key;
2309: }
2310: return "UNKNOWN";
2311: }
2312:
2313: static const char *
2314: fmt_intarg(OpCodes code, int val)
2315: {
2316: if (val == -1)
2317: return "unset";
2318: switch (code) {
2319: case oAddressFamily:
2320: return fmt_multistate_int(val, multistate_addressfamily);
2321: case oVerifyHostKeyDNS:
1.232 djm 2322: case oUpdateHostkeys:
1.221 djm 2323: return fmt_multistate_int(val, multistate_yesnoask);
1.278 djm 2324: case oStrictHostKeyChecking:
2325: return fmt_multistate_int(val, multistate_strict_hostkey);
1.221 djm 2326: case oControlMaster:
2327: return fmt_multistate_int(val, multistate_controlmaster);
2328: case oTunnel:
2329: return fmt_multistate_int(val, multistate_tunnel);
2330: case oRequestTTY:
2331: return fmt_multistate_int(val, multistate_requesttty);
2332: case oCanonicalizeHostname:
2333: return fmt_multistate_int(val, multistate_canonicalizehostname);
1.224 djm 2334: case oFingerprintHash:
2335: return ssh_digest_alg_name(val);
1.221 djm 2336: default:
2337: switch (val) {
2338: case 0:
2339: return "no";
2340: case 1:
2341: return "yes";
2342: default:
2343: return "UNKNOWN";
2344: }
2345: }
2346: }
2347:
2348: static const char *
2349: lookup_opcode_name(OpCodes code)
2350: {
2351: u_int i;
2352:
2353: for (i = 0; keywords[i].name != NULL; i++)
2354: if (keywords[i].opcode == code)
2355: return(keywords[i].name);
2356: return "UNKNOWN";
2357: }
2358:
2359: static void
2360: dump_cfg_int(OpCodes code, int val)
2361: {
2362: printf("%s %d\n", lookup_opcode_name(code), val);
2363: }
2364:
2365: static void
2366: dump_cfg_fmtint(OpCodes code, int val)
2367: {
2368: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2369: }
2370:
2371: static void
2372: dump_cfg_string(OpCodes code, const char *val)
2373: {
2374: if (val == NULL)
2375: return;
2376: printf("%s %s\n", lookup_opcode_name(code), val);
2377: }
2378:
2379: static void
2380: dump_cfg_strarray(OpCodes code, u_int count, char **vals)
2381: {
2382: u_int i;
2383:
2384: for (i = 0; i < count; i++)
2385: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2386: }
2387:
2388: static void
2389: dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
2390: {
2391: u_int i;
2392:
2393: printf("%s", lookup_opcode_name(code));
2394: for (i = 0; i < count; i++)
2395: printf(" %s", vals[i]);
2396: printf("\n");
2397: }
2398:
2399: static void
2400: dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
2401: {
2402: const struct Forward *fwd;
2403: u_int i;
2404:
2405: /* oDynamicForward */
2406: for (i = 0; i < count; i++) {
2407: fwd = &fwds[i];
1.265 djm 2408: if (code == oDynamicForward && fwd->connect_host != NULL &&
1.221 djm 2409: strcmp(fwd->connect_host, "socks") != 0)
2410: continue;
1.265 djm 2411: if (code == oLocalForward && fwd->connect_host != NULL &&
1.221 djm 2412: strcmp(fwd->connect_host, "socks") == 0)
2413: continue;
2414: printf("%s", lookup_opcode_name(code));
2415: if (fwd->listen_port == PORT_STREAMLOCAL)
2416: printf(" %s", fwd->listen_path);
2417: else if (fwd->listen_host == NULL)
2418: printf(" %d", fwd->listen_port);
2419: else {
2420: printf(" [%s]:%d",
2421: fwd->listen_host, fwd->listen_port);
2422: }
2423: if (code != oDynamicForward) {
2424: if (fwd->connect_port == PORT_STREAMLOCAL)
2425: printf(" %s", fwd->connect_path);
2426: else if (fwd->connect_host == NULL)
2427: printf(" %d", fwd->connect_port);
2428: else {
2429: printf(" [%s]:%d",
2430: fwd->connect_host, fwd->connect_port);
2431: }
2432: }
2433: printf("\n");
2434: }
2435: }
2436:
2437: void
2438: dump_client_config(Options *o, const char *host)
2439: {
2440: int i;
1.257 djm 2441: char buf[8];
1.221 djm 2442:
1.240 djm 2443: /* This is normally prepared in ssh_kex2 */
2444: if (kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->hostkeyalgorithms) != 0)
2445: fatal("%s: kex_assemble_names failed", __func__);
2446:
1.221 djm 2447: /* Most interesting options first: user, host, port */
2448: dump_cfg_string(oUser, o->user);
2449: dump_cfg_string(oHostName, host);
2450: dump_cfg_int(oPort, o->port);
2451:
2452: /* Flag options */
2453: dump_cfg_fmtint(oAddressFamily, o->address_family);
2454: dump_cfg_fmtint(oBatchMode, o->batch_mode);
2455: dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
2456: dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
2457: dump_cfg_fmtint(oChallengeResponseAuthentication, o->challenge_response_authentication);
2458: dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
2459: dump_cfg_fmtint(oCompression, o->compression);
2460: dump_cfg_fmtint(oControlMaster, o->control_master);
2461: dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
1.256 dtucker 2462: dump_cfg_fmtint(oClearAllForwardings, o->clear_forwardings);
1.221 djm 2463: dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
1.224 djm 2464: dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
1.221 djm 2465: dump_cfg_fmtint(oForwardAgent, o->forward_agent);
2466: dump_cfg_fmtint(oForwardX11, o->forward_x11);
2467: dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
2468: dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
2469: #ifdef GSSAPI
2470: dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
2471: dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
2472: #endif /* GSSAPI */
2473: dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
2474: dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
2475: dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
2476: dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
2477: dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
2478: dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
2479: dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
2480: dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
2481: dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
2482: dump_cfg_fmtint(oRequestTTY, o->request_tty);
2483: dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
2484: dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
2485: dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
2486: dump_cfg_fmtint(oTunnel, o->tun_open);
2487: dump_cfg_fmtint(oUsePrivilegedPort, o->use_privileged_port);
2488: dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
2489: dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
1.229 djm 2490: dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
1.221 djm 2491:
2492: /* Integer options */
2493: dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
2494: dump_cfg_int(oConnectionAttempts, o->connection_attempts);
2495: dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
2496: dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
2497: dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
2498: dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
2499:
2500: /* String options */
2501: dump_cfg_string(oBindAddress, o->bind_address);
1.282 djm 2502: dump_cfg_string(oBindInterface, o->bind_interface);
1.221 djm 2503: dump_cfg_string(oCiphers, o->ciphers ? o->ciphers : KEX_CLIENT_ENCRYPT);
2504: dump_cfg_string(oControlPath, o->control_path);
1.240 djm 2505: dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
1.221 djm 2506: dump_cfg_string(oHostKeyAlias, o->host_key_alias);
1.230 djm 2507: dump_cfg_string(oHostbasedKeyTypes, o->hostbased_key_types);
1.253 markus 2508: dump_cfg_string(oIdentityAgent, o->identity_agent);
1.221 djm 2509: dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
2510: dump_cfg_string(oKexAlgorithms, o->kex_algorithms ? o->kex_algorithms : KEX_CLIENT_KEX);
2511: dump_cfg_string(oLocalCommand, o->local_command);
1.277 bluhm 2512: dump_cfg_string(oRemoteCommand, o->remote_command);
1.221 djm 2513: dump_cfg_string(oLogLevel, log_level_name(o->log_level));
2514: dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC);
1.266 djm 2515: #ifdef ENABLE_PKCS11
1.221 djm 2516: dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
1.266 djm 2517: #endif
1.221 djm 2518: dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
1.242 djm 2519: dump_cfg_string(oPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.230 djm 2520: dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
1.221 djm 2521: dump_cfg_string(oXAuthLocation, o->xauth_location);
2522:
1.230 djm 2523: /* Forwards */
1.221 djm 2524: dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
2525: dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
2526: dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
2527:
2528: /* String array options */
2529: dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
2530: dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
2531: dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
2532: dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
2533: dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
2534:
2535: /* Special cases */
2536:
2537: /* oConnectTimeout */
2538: if (o->connection_timeout == -1)
2539: printf("connecttimeout none\n");
2540: else
2541: dump_cfg_int(oConnectTimeout, o->connection_timeout);
2542:
2543: /* oTunnelDevice */
2544: printf("tunneldevice");
2545: if (o->tun_local == SSH_TUNID_ANY)
2546: printf(" any");
2547: else
2548: printf(" %d", o->tun_local);
2549: if (o->tun_remote == SSH_TUNID_ANY)
2550: printf(":any");
2551: else
2552: printf(":%d", o->tun_remote);
2553: printf("\n");
2554:
2555: /* oCanonicalizePermittedCNAMEs */
2556: if ( o->num_permitted_cnames > 0) {
2557: printf("canonicalizePermittedcnames");
2558: for (i = 0; i < o->num_permitted_cnames; i++) {
2559: printf(" %s:%s", o->permitted_cnames[i].source_list,
2560: o->permitted_cnames[i].target_list);
2561: }
2562: printf("\n");
2563: }
2564:
2565: /* oControlPersist */
2566: if (o->control_persist == 0 || o->control_persist_timeout == 0)
2567: dump_cfg_fmtint(oControlPersist, o->control_persist);
2568: else
2569: dump_cfg_int(oControlPersist, o->control_persist_timeout);
2570:
2571: /* oEscapeChar */
2572: if (o->escape_char == SSH_ESCAPECHAR_NONE)
2573: printf("escapechar none\n");
2574: else {
1.257 djm 2575: vis(buf, o->escape_char, VIS_WHITE, 0);
2576: printf("escapechar %s\n", buf);
1.221 djm 2577: }
2578:
2579: /* oIPQoS */
2580: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2581: printf("%s\n", iptos2str(o->ip_qos_bulk));
2582:
2583: /* oRekeyLimit */
1.249 dtucker 2584: printf("rekeylimit %llu %d\n",
2585: (unsigned long long)o->rekey_limit, o->rekey_interval);
1.221 djm 2586:
2587: /* oStreamLocalBindMask */
2588: printf("streamlocalbindmask 0%o\n",
2589: o->fwd_opts.streamlocal_bind_mask);
1.257 djm 2590:
2591: /* oProxyCommand / oProxyJump */
2592: if (o->jump_host == NULL)
2593: dump_cfg_string(oProxyCommand, o->proxy_command);
2594: else {
2595: /* Check for numeric addresses */
2596: i = strchr(o->jump_host, ':') != NULL ||
2597: strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
2598: snprintf(buf, sizeof(buf), "%d", o->jump_port);
2599: printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
1.259 djm 2600: /* optional additional jump spec */
2601: o->jump_extra == NULL ? "" : o->jump_extra,
2602: o->jump_extra == NULL ? "" : ",",
1.257 djm 2603: /* optional user */
2604: o->jump_user == NULL ? "" : o->jump_user,
2605: o->jump_user == NULL ? "" : "@",
2606: /* opening [ if hostname is numeric */
2607: i ? "[" : "",
2608: /* mandatory hostname */
2609: o->jump_host,
2610: /* closing ] if hostname is numeric */
2611: i ? "]" : "",
2612: /* optional port number */
2613: o->jump_port <= 0 ? "" : ":",
1.259 djm 2614: o->jump_port <= 0 ? "" : buf);
1.257 djm 2615: }
1.1 deraadt 2616: }
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