Annotation of src/usr.bin/ssh/readconf.c, Revision 1.265
1.265 ! djm 1: /* $OpenBSD: readconf.c,v 1.264 2017/01/06 09:27:52 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
81: Cipher 3des
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
96: Cipher none
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,
1.62 markus 140: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.221 djm 141: oPubkeyAuthentication,
1.67 markus 142: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 143: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.183 markus 144: oHostKeyAlgorithms, oBindAddress, oPKCS11Provider,
1.96 markus 145: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 146: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 147: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 148: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.187 djm 149: oSendEnv, oControlPath, oControlMaster, oControlPersist,
150: oHashKnownHosts,
1.144 reyk 151: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.248 markus 152: oVisualHostKey,
1.205 djm 153: oKexAlgorithms, oIPQoS, oRequestTTY, oIgnoreUnknown, oProxyUseFdpass,
1.209 djm 154: oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
155: oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
1.223 djm 156: oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
1.230 djm 157: oFingerprintHash, oUpdateHostkeys, oHostbasedKeyTypes,
1.257 djm 158: oPubkeyAcceptedKeyTypes, oProxyJump,
1.199 djm 159: oIgnoredUnknownOption, oDeprecated, oUnsupported
1.1 deraadt 160: } OpCodes;
161:
162: /* Textual representations of the tokens. */
163:
1.17 markus 164: static struct {
165: const char *name;
166: OpCodes opcode;
167: } keywords[] = {
168: { "forwardagent", oForwardAgent },
169: { "forwardx11", oForwardX11 },
1.123 markus 170: { "forwardx11trusted", oForwardX11Trusted },
1.186 djm 171: { "forwardx11timeout", oForwardX11Timeout },
1.153 markus 172: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 173: { "xauthlocation", oXAuthLocation },
1.17 markus 174: { "gatewayports", oGatewayPorts },
175: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 176: { "rhostsauthentication", oDeprecated },
1.17 markus 177: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 178: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
179: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 180: { "rsaauthentication", oRSAAuthentication },
1.50 markus 181: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 182: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 183: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 184: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 185: { "challengeresponseauthentication", oChallengeResponseAuthentication },
186: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
187: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 188: { "kerberosauthentication", oUnsupported },
189: { "kerberostgtpassing", oUnsupported },
190: { "afstokenpassing", oUnsupported },
1.118 markus 191: #if defined(GSSAPI)
192: { "gssapiauthentication", oGssAuthentication },
193: { "gssapidelegatecredentials", oGssDelegateCreds },
194: #else
195: { "gssapiauthentication", oUnsupported },
196: { "gssapidelegatecredentials", oUnsupported },
197: #endif
1.96 markus 198: { "fallbacktorsh", oDeprecated },
199: { "usersh", oDeprecated },
1.17 markus 200: { "identityfile", oIdentityFile },
1.174 stevesk 201: { "identityfile2", oIdentityFile }, /* obsolete */
1.128 markus 202: { "identitiesonly", oIdentitiesOnly },
1.241 djm 203: { "certificatefile", oCertificateFile },
1.246 jcs 204: { "addkeystoagent", oAddKeysToAgent },
1.253 markus 205: { "identityagent", oIdentityAgent },
1.17 markus 206: { "hostname", oHostName },
1.52 markus 207: { "hostkeyalias", oHostKeyAlias },
1.17 markus 208: { "proxycommand", oProxyCommand },
209: { "port", oPort },
210: { "cipher", oCipher },
1.25 markus 211: { "ciphers", oCiphers },
1.62 markus 212: { "macs", oMacs },
1.25 markus 213: { "protocol", oProtocol },
1.17 markus 214: { "remoteforward", oRemoteForward },
215: { "localforward", oLocalForward },
216: { "user", oUser },
217: { "host", oHost },
1.206 djm 218: { "match", oMatch },
1.17 markus 219: { "escapechar", oEscapeChar },
220: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.193 djm 221: { "globalknownhostsfile2", oDeprecated },
1.174 stevesk 222: { "userknownhostsfile", oUserKnownHostsFile },
1.221 djm 223: { "userknownhostsfile2", oDeprecated },
1.17 markus 224: { "connectionattempts", oConnectionAttempts },
225: { "batchmode", oBatchMode },
226: { "checkhostip", oCheckHostIP },
227: { "stricthostkeychecking", oStrictHostKeyChecking },
228: { "compression", oCompression },
229: { "compressionlevel", oCompressionLevel },
1.126 markus 230: { "tcpkeepalive", oTCPKeepAlive },
231: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 232: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
233: { "loglevel", oLogLevel },
1.71 markus 234: { "dynamicforward", oDynamicForward },
1.67 markus 235: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 236: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 237: { "bindaddress", oBindAddress },
1.183 markus 238: #ifdef ENABLE_PKCS11
239: { "smartcarddevice", oPKCS11Provider },
240: { "pkcs11provider", oPKCS11Provider },
1.110 jakob 241: #else
242: { "smartcarddevice", oUnsupported },
1.183 markus 243: { "pkcs11provider", oUnsupported },
1.110 jakob 244: #endif
1.93 deraadt 245: { "clearallforwardings", oClearAllForwardings },
1.101 markus 246: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 247: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 248: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 249: { "rekeylimit", oRekeyLimit },
1.111 djm 250: { "connecttimeout", oConnectTimeout },
1.112 djm 251: { "addressfamily", oAddressFamily },
1.127 markus 252: { "serveraliveinterval", oServerAliveInterval },
253: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 254: { "sendenv", oSendEnv },
1.132 djm 255: { "controlpath", oControlPath },
256: { "controlmaster", oControlMaster },
1.187 djm 257: { "controlpersist", oControlPersist },
1.136 djm 258: { "hashknownhosts", oHashKnownHosts },
1.252 djm 259: { "include", oInclude },
1.144 reyk 260: { "tunnel", oTunnel },
261: { "tunneldevice", oTunnelDevice },
262: { "localcommand", oLocalCommand },
263: { "permitlocalcommand", oPermitLocalCommand },
1.167 grunk 264: { "visualhostkey", oVisualHostKey },
1.248 markus 265: { "useroaming", oDeprecated },
1.189 djm 266: { "kexalgorithms", oKexAlgorithms },
1.190 djm 267: { "ipqos", oIPQoS },
1.192 djm 268: { "requesttty", oRequestTTY },
1.205 djm 269: { "proxyusefdpass", oProxyUseFdpass },
1.208 djm 270: { "canonicaldomains", oCanonicalDomains },
1.209 djm 271: { "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
272: { "canonicalizehostname", oCanonicalizeHostname },
273: { "canonicalizemaxdots", oCanonicalizeMaxDots },
274: { "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
1.220 millert 275: { "streamlocalbindmask", oStreamLocalBindMask },
276: { "streamlocalbindunlink", oStreamLocalBindUnlink },
1.223 djm 277: { "revokedhostkeys", oRevokedHostKeys },
1.224 djm 278: { "fingerprinthash", oFingerprintHash },
1.229 djm 279: { "updatehostkeys", oUpdateHostkeys },
1.230 djm 280: { "hostbasedkeytypes", oHostbasedKeyTypes },
1.238 markus 281: { "pubkeyacceptedkeytypes", oPubkeyAcceptedKeyTypes },
1.199 djm 282: { "ignoreunknown", oIgnoreUnknown },
1.257 djm 283: { "proxyjump", oProxyJump },
1.171 djm 284:
1.92 stevesk 285: { NULL, oBadOption }
1.13 markus 286: };
287:
1.19 markus 288: /*
289: * Adds a local TCP/IP port forward to options. Never returns if there is an
290: * error.
291: */
1.1 deraadt 292:
1.26 markus 293: void
1.220 millert 294: add_local_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 295: {
1.220 millert 296: struct Forward *fwd;
1.17 markus 297: extern uid_t original_real_uid;
1.251 djm 298: int i;
1.185 djm 299:
1.262 jsg 300: if (!bind_permitted(newfwd->listen_port, original_real_uid) &&
1.220 millert 301: newfwd->listen_path == NULL)
1.64 millert 302: fatal("Privileged ports can only be forwarded by root.");
1.251 djm 303: /* Don't add duplicates */
304: for (i = 0; i < options->num_local_forwards; i++) {
305: if (forward_equals(newfwd, options->local_forwards + i))
306: return;
307: }
1.234 deraadt 308: options->local_forwards = xreallocarray(options->local_forwards,
1.185 djm 309: options->num_local_forwards + 1,
310: sizeof(*options->local_forwards));
1.17 markus 311: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 312:
1.172 stevesk 313: fwd->listen_host = newfwd->listen_host;
1.135 djm 314: fwd->listen_port = newfwd->listen_port;
1.220 millert 315: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 316: fwd->connect_host = newfwd->connect_host;
1.135 djm 317: fwd->connect_port = newfwd->connect_port;
1.220 millert 318: fwd->connect_path = newfwd->connect_path;
1.1 deraadt 319: }
320:
1.19 markus 321: /*
322: * Adds a remote TCP/IP port forward to options. Never returns if there is
323: * an error.
324: */
1.1 deraadt 325:
1.26 markus 326: void
1.220 millert 327: add_remote_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 328: {
1.220 millert 329: struct Forward *fwd;
1.251 djm 330: int i;
1.185 djm 331:
1.251 djm 332: /* Don't add duplicates */
333: for (i = 0; i < options->num_remote_forwards; i++) {
334: if (forward_equals(newfwd, options->remote_forwards + i))
335: return;
336: }
1.234 deraadt 337: options->remote_forwards = xreallocarray(options->remote_forwards,
1.185 djm 338: options->num_remote_forwards + 1,
339: sizeof(*options->remote_forwards));
1.17 markus 340: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 341:
1.172 stevesk 342: fwd->listen_host = newfwd->listen_host;
1.135 djm 343: fwd->listen_port = newfwd->listen_port;
1.220 millert 344: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 345: fwd->connect_host = newfwd->connect_host;
1.135 djm 346: fwd->connect_port = newfwd->connect_port;
1.220 millert 347: fwd->connect_path = newfwd->connect_path;
1.194 markus 348: fwd->handle = newfwd->handle;
1.184 markus 349: fwd->allocated_port = 0;
1.1 deraadt 350: }
351:
1.90 stevesk 352: static void
353: clear_forwardings(Options *options)
354: {
355: int i;
356:
1.135 djm 357: for (i = 0; i < options->num_local_forwards; i++) {
1.202 djm 358: free(options->local_forwards[i].listen_host);
1.220 millert 359: free(options->local_forwards[i].listen_path);
1.202 djm 360: free(options->local_forwards[i].connect_host);
1.220 millert 361: free(options->local_forwards[i].connect_path);
1.135 djm 362: }
1.185 djm 363: if (options->num_local_forwards > 0) {
1.202 djm 364: free(options->local_forwards);
1.185 djm 365: options->local_forwards = NULL;
366: }
1.90 stevesk 367: options->num_local_forwards = 0;
1.135 djm 368: for (i = 0; i < options->num_remote_forwards; i++) {
1.202 djm 369: free(options->remote_forwards[i].listen_host);
1.220 millert 370: free(options->remote_forwards[i].listen_path);
1.202 djm 371: free(options->remote_forwards[i].connect_host);
1.220 millert 372: free(options->remote_forwards[i].connect_path);
1.135 djm 373: }
1.185 djm 374: if (options->num_remote_forwards > 0) {
1.202 djm 375: free(options->remote_forwards);
1.185 djm 376: options->remote_forwards = NULL;
377: }
1.90 stevesk 378: options->num_remote_forwards = 0;
1.145 reyk 379: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 380: }
381:
1.195 dtucker 382: void
1.241 djm 383: add_certificate_file(Options *options, const char *path, int userprovided)
384: {
385: int i;
386:
387: if (options->num_certificate_files >= SSH_MAX_CERTIFICATE_FILES)
388: fatal("Too many certificate files specified (max %d)",
389: SSH_MAX_CERTIFICATE_FILES);
390:
391: /* Avoid registering duplicates */
392: for (i = 0; i < options->num_certificate_files; i++) {
393: if (options->certificate_file_userprovided[i] == userprovided &&
394: strcmp(options->certificate_files[i], path) == 0) {
395: debug2("%s: ignoring duplicate key %s", __func__, path);
396: return;
397: }
398: }
399:
400: options->certificate_file_userprovided[options->num_certificate_files] =
401: userprovided;
402: options->certificate_files[options->num_certificate_files++] =
403: xstrdup(path);
404: }
405:
406: void
1.195 dtucker 407: add_identity_file(Options *options, const char *dir, const char *filename,
408: int userprovided)
409: {
410: char *path;
1.219 djm 411: int i;
1.195 dtucker 412:
413: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
414: fatal("Too many identity files specified (max %d)",
415: SSH_MAX_IDENTITY_FILES);
416:
417: if (dir == NULL) /* no dir, filename is absolute */
418: path = xstrdup(filename);
419: else
420: (void)xasprintf(&path, "%.100s%.100s", dir, filename);
1.219 djm 421:
422: /* Avoid registering duplicates */
423: for (i = 0; i < options->num_identity_files; i++) {
424: if (options->identity_file_userprovided[i] == userprovided &&
425: strcmp(options->identity_files[i], path) == 0) {
426: debug2("%s: ignoring duplicate key %s", __func__, path);
427: free(path);
428: return;
429: }
430: }
1.195 dtucker 431:
432: options->identity_file_userprovided[options->num_identity_files] =
433: userprovided;
434: options->identity_files[options->num_identity_files++] = path;
435: }
436:
1.206 djm 437: int
438: default_ssh_port(void)
439: {
440: static int port;
441: struct servent *sp;
442:
443: if (port == 0) {
444: sp = getservbyname(SSH_SERVICE_NAME, "tcp");
445: port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
446: }
447: return port;
448: }
449:
450: /*
451: * Execute a command in a shell.
452: * Return its exit status or -1 on abnormal exit.
453: */
454: static int
455: execute_in_shell(const char *cmd)
456: {
1.243 dtucker 457: char *shell;
1.206 djm 458: pid_t pid;
459: int devnull, status;
460: extern uid_t original_real_uid;
461:
462: if ((shell = getenv("SHELL")) == NULL)
463: shell = _PATH_BSHELL;
464:
465: /* Need this to redirect subprocess stdin/out */
466: if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
467: fatal("open(/dev/null): %s", strerror(errno));
468:
469: debug("Executing command: '%.500s'", cmd);
470:
471: /* Fork and execute the command. */
472: if ((pid = fork()) == 0) {
1.245 djm 473: char *argv[4];
1.206 djm 474:
475: /* Child. Permanently give up superuser privileges. */
476: permanently_drop_suid(original_real_uid);
477:
478: /* Redirect child stdin and stdout. Leave stderr */
479: if (dup2(devnull, STDIN_FILENO) == -1)
480: fatal("dup2: %s", strerror(errno));
481: if (dup2(devnull, STDOUT_FILENO) == -1)
482: fatal("dup2: %s", strerror(errno));
483: if (devnull > STDERR_FILENO)
484: close(devnull);
485: closefrom(STDERR_FILENO + 1);
1.245 djm 486:
487: argv[0] = shell;
488: argv[1] = "-c";
489: argv[2] = xstrdup(cmd);
490: argv[3] = NULL;
1.206 djm 491:
492: execv(argv[0], argv);
493: error("Unable to execute '%.100s': %s", cmd, strerror(errno));
494: /* Die with signal to make this error apparent to parent. */
495: signal(SIGTERM, SIG_DFL);
496: kill(getpid(), SIGTERM);
497: _exit(1);
498: }
499: /* Parent. */
500: if (pid < 0)
501: fatal("%s: fork: %.100s", __func__, strerror(errno));
502:
503: close(devnull);
504:
505: while (waitpid(pid, &status, 0) == -1) {
506: if (errno != EINTR && errno != EAGAIN)
507: fatal("%s: waitpid: %s", __func__, strerror(errno));
508: }
509: if (!WIFEXITED(status)) {
510: error("command '%.100s' exited abnormally", cmd);
511: return -1;
1.221 djm 512: }
1.206 djm 513: debug3("command returned status %d", WEXITSTATUS(status));
514: return WEXITSTATUS(status);
515: }
516:
517: /*
518: * Parse and execute a Match directive.
519: */
520: static int
521: match_cfg_line(Options *options, char **condition, struct passwd *pw,
1.221 djm 522: const char *host_arg, const char *original_host, int post_canon,
523: const char *filename, int linenum)
1.206 djm 524: {
1.221 djm 525: char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria;
1.211 djm 526: const char *ruser;
1.221 djm 527: int r, port, this_result, result = 1, attributes = 0, negate;
1.206 djm 528: char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
529:
530: /*
531: * Configuration is likely to be incomplete at this point so we
532: * must be prepared to use default values.
533: */
534: port = options->port <= 0 ? default_ssh_port() : options->port;
535: ruser = options->user == NULL ? pw->pw_name : options->user;
1.250 djm 536: if (post_canon) {
537: host = xstrdup(options->hostname);
538: } else if (options->hostname != NULL) {
1.212 djm 539: /* NB. Please keep in sync with ssh.c:main() */
1.211 djm 540: host = percent_expand(options->hostname,
541: "h", host_arg, (char *)NULL);
1.250 djm 542: } else {
1.211 djm 543: host = xstrdup(host_arg);
1.250 djm 544: }
1.206 djm 545:
1.221 djm 546: debug2("checking match for '%s' host %s originally %s",
547: cp, host, original_host);
548: while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') {
549: criteria = NULL;
550: this_result = 1;
551: if ((negate = attrib[0] == '!'))
552: attrib++;
553: /* criteria "all" and "canonical" have no argument */
1.213 dtucker 554: if (strcasecmp(attrib, "all") == 0) {
1.221 djm 555: if (attributes > 1 ||
1.213 dtucker 556: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
1.221 djm 557: error("%.200s line %d: '%s' cannot be combined "
558: "with other Match attributes",
559: filename, linenum, oattrib);
1.213 dtucker 560: result = -1;
561: goto out;
562: }
1.221 djm 563: if (result)
564: result = negate ? 0 : 1;
1.213 dtucker 565: goto out;
566: }
1.221 djm 567: attributes++;
568: if (strcasecmp(attrib, "canonical") == 0) {
569: r = !!post_canon; /* force bitmask member to boolean */
570: if (r == (negate ? 1 : 0))
571: this_result = result = 0;
572: debug3("%.200s line %d: %smatched '%s'",
573: filename, linenum,
574: this_result ? "" : "not ", oattrib);
575: continue;
576: }
577: /* All other criteria require an argument */
1.206 djm 578: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
579: error("Missing Match criteria for %s", attrib);
1.211 djm 580: result = -1;
581: goto out;
1.206 djm 582: }
583: if (strcasecmp(attrib, "host") == 0) {
1.221 djm 584: criteria = xstrdup(host);
1.235 djm 585: r = match_hostname(host, arg) == 1;
1.221 djm 586: if (r == (negate ? 1 : 0))
587: this_result = result = 0;
1.206 djm 588: } else if (strcasecmp(attrib, "originalhost") == 0) {
1.221 djm 589: criteria = xstrdup(original_host);
1.235 djm 590: r = match_hostname(original_host, arg) == 1;
1.221 djm 591: if (r == (negate ? 1 : 0))
592: this_result = result = 0;
1.206 djm 593: } else if (strcasecmp(attrib, "user") == 0) {
1.221 djm 594: criteria = xstrdup(ruser);
1.235 djm 595: r = match_pattern_list(ruser, arg, 0) == 1;
1.221 djm 596: if (r == (negate ? 1 : 0))
597: this_result = result = 0;
1.206 djm 598: } else if (strcasecmp(attrib, "localuser") == 0) {
1.221 djm 599: criteria = xstrdup(pw->pw_name);
1.235 djm 600: r = match_pattern_list(pw->pw_name, arg, 0) == 1;
1.221 djm 601: if (r == (negate ? 1 : 0))
602: this_result = result = 0;
1.210 djm 603: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 604: if (gethostname(thishost, sizeof(thishost)) == -1)
605: fatal("gethostname: %s", strerror(errno));
606: strlcpy(shorthost, thishost, sizeof(shorthost));
607: shorthost[strcspn(thishost, ".")] = '\0';
608: snprintf(portstr, sizeof(portstr), "%d", port);
609:
610: cmd = percent_expand(arg,
611: "L", shorthost,
612: "d", pw->pw_dir,
613: "h", host,
614: "l", thishost,
1.221 djm 615: "n", original_host,
1.206 djm 616: "p", portstr,
617: "r", ruser,
618: "u", pw->pw_name,
619: (char *)NULL);
1.217 djm 620: if (result != 1) {
621: /* skip execution if prior predicate failed */
1.221 djm 622: debug3("%.200s line %d: skipped exec "
623: "\"%.100s\"", filename, linenum, cmd);
624: free(cmd);
625: continue;
626: }
627: r = execute_in_shell(cmd);
628: if (r == -1) {
629: fatal("%.200s line %d: match exec "
630: "'%.100s' error", filename,
631: linenum, cmd);
1.217 djm 632: }
1.221 djm 633: criteria = xstrdup(cmd);
1.206 djm 634: free(cmd);
1.221 djm 635: /* Force exit status to boolean */
636: r = r == 0;
637: if (r == (negate ? 1 : 0))
638: this_result = result = 0;
1.206 djm 639: } else {
640: error("Unsupported Match attribute %s", attrib);
1.211 djm 641: result = -1;
642: goto out;
1.206 djm 643: }
1.221 djm 644: debug3("%.200s line %d: %smatched '%s \"%.100s\"' ",
645: filename, linenum, this_result ? "": "not ",
646: oattrib, criteria);
647: free(criteria);
1.213 dtucker 648: }
649: if (attributes == 0) {
650: error("One or more attributes required for Match");
651: result = -1;
652: goto out;
1.206 djm 653: }
1.221 djm 654: out:
655: if (result != -1)
656: debug2("match %sfound", result ? "" : "not ");
1.206 djm 657: *condition = cp;
1.211 djm 658: free(host);
1.206 djm 659: return result;
660: }
661:
1.208 djm 662: /* Check and prepare a domain name: removes trailing '.' and lowercases */
663: static void
664: valid_domain(char *name, const char *filename, int linenum)
665: {
666: size_t i, l = strlen(name);
667: u_char c, last = '\0';
668:
669: if (l == 0)
670: fatal("%s line %d: empty hostname suffix", filename, linenum);
671: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
672: fatal("%s line %d: hostname suffix \"%.100s\" "
673: "starts with invalid character", filename, linenum, name);
674: for (i = 0; i < l; i++) {
675: c = tolower((u_char)name[i]);
676: name[i] = (char)c;
677: if (last == '.' && c == '.')
678: fatal("%s line %d: hostname suffix \"%.100s\" contains "
679: "consecutive separators", filename, linenum, name);
680: if (c != '.' && c != '-' && !isalnum(c) &&
681: c != '_') /* technically invalid, but common */
682: fatal("%s line %d: hostname suffix \"%.100s\" contains "
683: "invalid characters", filename, linenum, name);
684: last = c;
685: }
686: if (name[l - 1] == '.')
687: name[l - 1] = '\0';
688: }
689:
1.19 markus 690: /*
1.70 stevesk 691: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 692: */
1.26 markus 693: static OpCodes
1.199 djm 694: parse_token(const char *cp, const char *filename, int linenum,
695: const char *ignored_unknown)
1.1 deraadt 696: {
1.199 djm 697: int i;
1.1 deraadt 698:
1.17 markus 699: for (i = 0; keywords[i].name; i++)
1.199 djm 700: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 701: return keywords[i].opcode;
1.235 djm 702: if (ignored_unknown != NULL &&
703: match_pattern_list(cp, ignored_unknown, 1) == 1)
1.199 djm 704: return oIgnoredUnknownOption;
1.75 stevesk 705: error("%s: line %d: Bad configuration option: %s",
706: filename, linenum, cp);
1.17 markus 707: return oBadOption;
1.1 deraadt 708: }
709:
1.207 djm 710: /* Multistate option parsing */
711: struct multistate {
712: char *key;
713: int value;
714: };
715: static const struct multistate multistate_flag[] = {
716: { "true", 1 },
717: { "false", 0 },
718: { "yes", 1 },
719: { "no", 0 },
720: { NULL, -1 }
721: };
722: static const struct multistate multistate_yesnoask[] = {
723: { "true", 1 },
724: { "false", 0 },
725: { "yes", 1 },
726: { "no", 0 },
727: { "ask", 2 },
728: { NULL, -1 }
729: };
1.246 jcs 730: static const struct multistate multistate_yesnoaskconfirm[] = {
731: { "true", 1 },
732: { "false", 0 },
733: { "yes", 1 },
734: { "no", 0 },
735: { "ask", 2 },
736: { "confirm", 3 },
737: { NULL, -1 }
738: };
1.207 djm 739: static const struct multistate multistate_addressfamily[] = {
740: { "inet", AF_INET },
741: { "inet6", AF_INET6 },
742: { "any", AF_UNSPEC },
743: { NULL, -1 }
744: };
745: static const struct multistate multistate_controlmaster[] = {
746: { "true", SSHCTL_MASTER_YES },
747: { "yes", SSHCTL_MASTER_YES },
748: { "false", SSHCTL_MASTER_NO },
749: { "no", SSHCTL_MASTER_NO },
750: { "auto", SSHCTL_MASTER_AUTO },
751: { "ask", SSHCTL_MASTER_ASK },
752: { "autoask", SSHCTL_MASTER_AUTO_ASK },
753: { NULL, -1 }
754: };
755: static const struct multistate multistate_tunnel[] = {
756: { "ethernet", SSH_TUNMODE_ETHERNET },
757: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
758: { "true", SSH_TUNMODE_DEFAULT },
759: { "yes", SSH_TUNMODE_DEFAULT },
760: { "false", SSH_TUNMODE_NO },
761: { "no", SSH_TUNMODE_NO },
762: { NULL, -1 }
763: };
764: static const struct multistate multistate_requesttty[] = {
765: { "true", REQUEST_TTY_YES },
766: { "yes", REQUEST_TTY_YES },
767: { "false", REQUEST_TTY_NO },
768: { "no", REQUEST_TTY_NO },
769: { "force", REQUEST_TTY_FORCE },
770: { "auto", REQUEST_TTY_AUTO },
771: { NULL, -1 }
772: };
1.209 djm 773: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 774: { "true", SSH_CANONICALISE_YES },
775: { "false", SSH_CANONICALISE_NO },
776: { "yes", SSH_CANONICALISE_YES },
777: { "no", SSH_CANONICALISE_NO },
778: { "always", SSH_CANONICALISE_ALWAYS },
779: { NULL, -1 }
780: };
1.207 djm 781:
1.19 markus 782: /*
783: * Processes a single option line as used in the configuration files. This
784: * only sets those values that have not already been set.
785: */
1.14 markus 786: int
1.206 djm 787: process_config_line(Options *options, struct passwd *pw, const char *host,
1.221 djm 788: const char *original_host, char *line, const char *filename,
789: int linenum, int *activep, int flags)
1.1 deraadt 790: {
1.252 djm 791: return process_config_line_depth(options, pw, host, original_host,
792: line, filename, linenum, activep, flags, 0);
793: }
794:
795: #define WHITESPACE " \t\r\n"
796: static int
797: process_config_line_depth(Options *options, struct passwd *pw, const char *host,
798: const char *original_host, char *line, const char *filename,
799: int linenum, int *activep, int flags, int depth)
800: {
1.193 djm 801: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
802: char **cpptr, fwdarg[256];
1.199 djm 803: u_int i, *uintptr, max_entries = 0;
1.252 djm 804: int r, oactive, negated, opcode, *intptr, value, value2, cmdline = 0;
1.164 dtucker 805: LogLevel *log_level_ptr;
1.201 dtucker 806: long long val64;
1.102 markus 807: size_t len;
1.220 millert 808: struct Forward fwd;
1.207 djm 809: const struct multistate *multistate_ptr;
1.208 djm 810: struct allowed_cname *cname;
1.252 djm 811: glob_t gl;
1.106 djm 812:
1.206 djm 813: if (activep == NULL) { /* We are processing a command line directive */
814: cmdline = 1;
815: activep = &cmdline;
816: }
817:
1.106 djm 818: /* Strip trailing whitespace */
1.233 djm 819: if ((len = strlen(line)) == 0)
820: return 0;
821: for (len--; len > 0; len--) {
1.106 djm 822: if (strchr(WHITESPACE, line[len]) == NULL)
823: break;
824: line[len] = '\0';
825: }
1.1 deraadt 826:
1.42 provos 827: s = line;
828: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 829: if ((keyword = strdelim(&s)) == NULL)
830: return 0;
1.42 provos 831: /* Ignore leading whitespace. */
832: if (*keyword == '\0')
1.43 markus 833: keyword = strdelim(&s);
1.56 deraadt 834: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 835: return 0;
1.199 djm 836: /* Match lowercase keyword */
1.207 djm 837: lowercase(keyword);
1.17 markus 838:
1.199 djm 839: opcode = parse_token(keyword, filename, linenum,
840: options->ignored_unknown);
1.17 markus 841:
842: switch (opcode) {
843: case oBadOption:
1.19 markus 844: /* don't panic, but count bad options */
845: return -1;
1.199 djm 846: case oIgnoredUnknownOption:
847: debug("%s line %d: Ignored unknown option \"%s\"",
848: filename, linenum, keyword);
849: return 0;
1.111 djm 850: case oConnectTimeout:
851: intptr = &options->connection_timeout;
1.127 markus 852: parse_time:
1.111 djm 853: arg = strdelim(&s);
854: if (!arg || *arg == '\0')
855: fatal("%s line %d: missing time value.",
856: filename, linenum);
1.221 djm 857: if (strcmp(arg, "none") == 0)
858: value = -1;
859: else if ((value = convtime(arg)) == -1)
1.111 djm 860: fatal("%s line %d: invalid time value.",
861: filename, linenum);
1.160 dtucker 862: if (*activep && *intptr == -1)
1.111 djm 863: *intptr = value;
864: break;
865:
1.17 markus 866: case oForwardAgent:
867: intptr = &options->forward_agent;
1.207 djm 868: parse_flag:
869: multistate_ptr = multistate_flag;
870: parse_multistate:
1.42 provos 871: arg = strdelim(&s);
1.40 ho 872: if (!arg || *arg == '\0')
1.207 djm 873: fatal("%s line %d: missing argument.",
874: filename, linenum);
875: value = -1;
876: for (i = 0; multistate_ptr[i].key != NULL; i++) {
877: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
878: value = multistate_ptr[i].value;
879: break;
880: }
881: }
882: if (value == -1)
883: fatal("%s line %d: unsupported option \"%s\".",
884: filename, linenum, arg);
1.17 markus 885: if (*activep && *intptr == -1)
886: *intptr = value;
887: break;
888:
889: case oForwardX11:
890: intptr = &options->forward_x11;
891: goto parse_flag;
892:
1.123 markus 893: case oForwardX11Trusted:
894: intptr = &options->forward_x11_trusted;
895: goto parse_flag;
1.221 djm 896:
1.186 djm 897: case oForwardX11Timeout:
898: intptr = &options->forward_x11_timeout;
899: goto parse_time;
1.123 markus 900:
1.17 markus 901: case oGatewayPorts:
1.220 millert 902: intptr = &options->fwd_opts.gateway_ports;
1.17 markus 903: goto parse_flag;
904:
1.153 markus 905: case oExitOnForwardFailure:
906: intptr = &options->exit_on_forward_failure;
907: goto parse_flag;
908:
1.17 markus 909: case oUsePrivilegedPort:
910: intptr = &options->use_privileged_port;
911: goto parse_flag;
912:
913: case oPasswordAuthentication:
914: intptr = &options->password_authentication;
915: goto parse_flag;
916:
1.48 markus 917: case oKbdInteractiveAuthentication:
918: intptr = &options->kbd_interactive_authentication;
919: goto parse_flag;
920:
921: case oKbdInteractiveDevices:
922: charptr = &options->kbd_interactive_devices;
923: goto parse_string;
924:
1.50 markus 925: case oPubkeyAuthentication:
926: intptr = &options->pubkey_authentication;
1.30 markus 927: goto parse_flag;
928:
1.17 markus 929: case oRSAAuthentication:
930: intptr = &options->rsa_authentication;
931: goto parse_flag;
932:
933: case oRhostsRSAAuthentication:
934: intptr = &options->rhosts_rsa_authentication;
935: goto parse_flag;
936:
1.72 markus 937: case oHostbasedAuthentication:
938: intptr = &options->hostbased_authentication;
939: goto parse_flag;
940:
1.59 markus 941: case oChallengeResponseAuthentication:
1.78 markus 942: intptr = &options->challenge_response_authentication;
1.17 markus 943: goto parse_flag;
1.108 jakob 944:
1.118 markus 945: case oGssAuthentication:
946: intptr = &options->gss_authentication;
947: goto parse_flag;
948:
949: case oGssDelegateCreds:
950: intptr = &options->gss_deleg_creds;
951: goto parse_flag;
952:
1.17 markus 953: case oBatchMode:
954: intptr = &options->batch_mode;
955: goto parse_flag;
956:
957: case oCheckHostIP:
958: intptr = &options->check_host_ip;
1.167 grunk 959: goto parse_flag;
1.17 markus 960:
1.107 jakob 961: case oVerifyHostKeyDNS:
962: intptr = &options->verify_host_key_dns;
1.207 djm 963: multistate_ptr = multistate_yesnoask;
964: goto parse_multistate;
1.107 jakob 965:
1.17 markus 966: case oStrictHostKeyChecking:
967: intptr = &options->strict_host_key_checking;
1.207 djm 968: multistate_ptr = multistate_yesnoask;
969: goto parse_multistate;
1.17 markus 970:
971: case oCompression:
972: intptr = &options->compression;
973: goto parse_flag;
974:
1.126 markus 975: case oTCPKeepAlive:
976: intptr = &options->tcp_keep_alive;
1.17 markus 977: goto parse_flag;
978:
1.91 markus 979: case oNoHostAuthenticationForLocalhost:
980: intptr = &options->no_host_authentication_for_localhost;
981: goto parse_flag;
982:
1.17 markus 983: case oNumberOfPasswordPrompts:
984: intptr = &options->number_of_password_prompts;
985: goto parse_int;
986:
987: case oCompressionLevel:
988: intptr = &options->compression_level;
989: goto parse_int;
990:
1.105 markus 991: case oRekeyLimit:
992: arg = strdelim(&s);
993: if (!arg || *arg == '\0')
1.198 dtucker 994: fatal("%.200s line %d: Missing argument.", filename,
995: linenum);
996: if (strcmp(arg, "default") == 0) {
997: val64 = 0;
998: } else {
1.200 dtucker 999: if (scan_scaled(arg, &val64) == -1)
1000: fatal("%.200s line %d: Bad number '%s': %s",
1001: filename, linenum, arg, strerror(errno));
1.198 dtucker 1002: if (val64 != 0 && val64 < 16)
1003: fatal("%.200s line %d: RekeyLimit too small",
1004: filename, linenum);
1.105 markus 1005: }
1.165 djm 1006: if (*activep && options->rekey_limit == -1)
1.249 dtucker 1007: options->rekey_limit = val64;
1.198 dtucker 1008: if (s != NULL) { /* optional rekey interval present */
1009: if (strcmp(s, "none") == 0) {
1010: (void)strdelim(&s); /* discard */
1011: break;
1012: }
1013: intptr = &options->rekey_interval;
1014: goto parse_time;
1015: }
1.105 markus 1016: break;
1017:
1.17 markus 1018: case oIdentityFile:
1.42 provos 1019: arg = strdelim(&s);
1.40 ho 1020: if (!arg || *arg == '\0')
1.17 markus 1021: fatal("%.200s line %d: Missing argument.", filename, linenum);
1022: if (*activep) {
1.50 markus 1023: intptr = &options->num_identity_files;
1.27 markus 1024: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 1025: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 1026: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.221 djm 1027: add_identity_file(options, NULL,
1028: arg, flags & SSHCONF_USERCONF);
1.17 markus 1029: }
1030: break;
1031:
1.241 djm 1032: case oCertificateFile:
1033: arg = strdelim(&s);
1034: if (!arg || *arg == '\0')
1035: fatal("%.200s line %d: Missing argument.",
1036: filename, linenum);
1037: if (*activep) {
1038: intptr = &options->num_certificate_files;
1039: if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
1040: fatal("%.200s line %d: Too many certificate "
1041: "files specified (max %d).",
1042: filename, linenum,
1043: SSH_MAX_CERTIFICATE_FILES);
1044: }
1045: add_certificate_file(options, arg,
1046: flags & SSHCONF_USERCONF);
1047: }
1048: break;
1049:
1.34 markus 1050: case oXAuthLocation:
1051: charptr=&options->xauth_location;
1052: goto parse_string;
1053:
1.17 markus 1054: case oUser:
1055: charptr = &options->user;
1056: parse_string:
1.42 provos 1057: arg = strdelim(&s);
1.40 ho 1058: if (!arg || *arg == '\0')
1.193 djm 1059: fatal("%.200s line %d: Missing argument.",
1060: filename, linenum);
1.17 markus 1061: if (*activep && *charptr == NULL)
1.38 provos 1062: *charptr = xstrdup(arg);
1.17 markus 1063: break;
1064:
1065: case oGlobalKnownHostsFile:
1.193 djm 1066: cpptr = (char **)&options->system_hostfiles;
1067: uintptr = &options->num_system_hostfiles;
1068: max_entries = SSH_MAX_HOSTS_FILES;
1069: parse_char_array:
1070: if (*activep && *uintptr == 0) {
1071: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1072: if ((*uintptr) >= max_entries)
1073: fatal("%s line %d: "
1074: "too many authorized keys files.",
1075: filename, linenum);
1076: cpptr[(*uintptr)++] = xstrdup(arg);
1077: }
1078: }
1079: return 0;
1.17 markus 1080:
1081: case oUserKnownHostsFile:
1.193 djm 1082: cpptr = (char **)&options->user_hostfiles;
1083: uintptr = &options->num_user_hostfiles;
1084: max_entries = SSH_MAX_HOSTS_FILES;
1085: goto parse_char_array;
1.27 markus 1086:
1.17 markus 1087: case oHostName:
1088: charptr = &options->hostname;
1089: goto parse_string;
1090:
1.52 markus 1091: case oHostKeyAlias:
1092: charptr = &options->host_key_alias;
1093: goto parse_string;
1094:
1.67 markus 1095: case oPreferredAuthentications:
1096: charptr = &options->preferred_authentications;
1097: goto parse_string;
1098:
1.77 markus 1099: case oBindAddress:
1100: charptr = &options->bind_address;
1101: goto parse_string;
1102:
1.183 markus 1103: case oPKCS11Provider:
1104: charptr = &options->pkcs11_provider;
1.86 markus 1105: goto parse_string;
1.85 jakob 1106:
1.17 markus 1107: case oProxyCommand:
1.144 reyk 1108: charptr = &options->proxy_command;
1.257 djm 1109: /* Ignore ProxyCommand if ProxyJump already specified */
1110: if (options->jump_host != NULL)
1111: charptr = &options->jump_host; /* Skip below */
1.144 reyk 1112: parse_command:
1.113 markus 1113: if (s == NULL)
1114: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 1115: len = strspn(s, WHITESPACE "=");
1.17 markus 1116: if (*activep && *charptr == NULL)
1.102 markus 1117: *charptr = xstrdup(s + len);
1.17 markus 1118: return 0;
1119:
1.257 djm 1120: case oProxyJump:
1121: if (s == NULL) {
1122: fatal("%.200s line %d: Missing argument.",
1123: filename, linenum);
1124: }
1125: len = strspn(s, WHITESPACE "=");
1126: if (parse_jump(s + len, options, *activep) == -1) {
1127: fatal("%.200s line %d: Invalid ProxyJump \"%s\"",
1128: filename, linenum, s + len);
1129: }
1130: return 0;
1131:
1.17 markus 1132: case oPort:
1133: intptr = &options->port;
1134: parse_int:
1.42 provos 1135: arg = strdelim(&s);
1.40 ho 1136: if (!arg || *arg == '\0')
1.17 markus 1137: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1138: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 1139: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 1140:
1141: /* Octal, decimal, or hex format? */
1.38 provos 1142: value = strtol(arg, &endofnumber, 0);
1143: if (arg == endofnumber)
1.21 markus 1144: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 1145: if (*activep && *intptr == -1)
1146: *intptr = value;
1147: break;
1148:
1149: case oConnectionAttempts:
1150: intptr = &options->connection_attempts;
1151: goto parse_int;
1152:
1153: case oCipher:
1154: intptr = &options->cipher;
1.42 provos 1155: arg = strdelim(&s);
1.40 ho 1156: if (!arg || *arg == '\0')
1.32 markus 1157: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1158: value = cipher_number(arg);
1.17 markus 1159: if (value == -1)
1160: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 1161: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 1162: if (*activep && *intptr == -1)
1163: *intptr = value;
1164: break;
1165:
1.25 markus 1166: case oCiphers:
1.42 provos 1167: arg = strdelim(&s);
1.40 ho 1168: if (!arg || *arg == '\0')
1.32 markus 1169: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.239 djm 1170: if (!ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.31 markus 1171: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1172: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1173: if (*activep && options->ciphers == NULL)
1.38 provos 1174: options->ciphers = xstrdup(arg);
1.25 markus 1175: break;
1176:
1.62 markus 1177: case oMacs:
1178: arg = strdelim(&s);
1179: if (!arg || *arg == '\0')
1180: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.239 djm 1181: if (!mac_valid(*arg == '+' ? arg + 1 : arg))
1.62 markus 1182: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1183: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1184: if (*activep && options->macs == NULL)
1185: options->macs = xstrdup(arg);
1186: break;
1187:
1.189 djm 1188: case oKexAlgorithms:
1189: arg = strdelim(&s);
1190: if (!arg || *arg == '\0')
1191: fatal("%.200s line %d: Missing argument.",
1192: filename, linenum);
1.239 djm 1193: if (!kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.189 djm 1194: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1195: filename, linenum, arg ? arg : "<NONE>");
1196: if (*activep && options->kex_algorithms == NULL)
1197: options->kex_algorithms = xstrdup(arg);
1198: break;
1199:
1.76 markus 1200: case oHostKeyAlgorithms:
1.238 markus 1201: charptr = &options->hostkeyalgorithms;
1202: parse_keytypes:
1.76 markus 1203: arg = strdelim(&s);
1204: if (!arg || *arg == '\0')
1.238 markus 1205: fatal("%.200s line %d: Missing argument.",
1206: filename, linenum);
1.239 djm 1207: if (!sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.238 markus 1208: fatal("%s line %d: Bad key types '%s'.",
1209: filename, linenum, arg ? arg : "<NONE>");
1210: if (*activep && *charptr == NULL)
1211: *charptr = xstrdup(arg);
1.76 markus 1212: break;
1213:
1.25 markus 1214: case oProtocol:
1215: intptr = &options->protocol;
1.42 provos 1216: arg = strdelim(&s);
1.40 ho 1217: if (!arg || *arg == '\0')
1.32 markus 1218: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1219: value = proto_spec(arg);
1.25 markus 1220: if (value == SSH_PROTO_UNKNOWN)
1221: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 1222: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1223: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
1224: *intptr = value;
1225: break;
1226:
1.17 markus 1227: case oLogLevel:
1.164 dtucker 1228: log_level_ptr = &options->log_level;
1.42 provos 1229: arg = strdelim(&s);
1.38 provos 1230: value = log_level_number(arg);
1.95 markus 1231: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1232: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1233: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1234: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1235: *log_level_ptr = (LogLevel) value;
1.17 markus 1236: break;
1237:
1.88 stevesk 1238: case oLocalForward:
1.17 markus 1239: case oRemoteForward:
1.168 stevesk 1240: case oDynamicForward:
1.42 provos 1241: arg = strdelim(&s);
1.135 djm 1242: if (arg == NULL || *arg == '\0')
1.88 stevesk 1243: fatal("%.200s line %d: Missing port argument.",
1244: filename, linenum);
1.135 djm 1245:
1.168 stevesk 1246: if (opcode == oLocalForward ||
1247: opcode == oRemoteForward) {
1248: arg2 = strdelim(&s);
1249: if (arg2 == NULL || *arg2 == '\0')
1250: fatal("%.200s line %d: Missing target argument.",
1251: filename, linenum);
1.135 djm 1252:
1.168 stevesk 1253: /* construct a string for parse_forward */
1254: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1255: } else if (opcode == oDynamicForward) {
1256: strlcpy(fwdarg, arg, sizeof(fwdarg));
1257: }
1258:
1259: if (parse_forward(&fwd, fwdarg,
1.176 djm 1260: opcode == oDynamicForward ? 1 : 0,
1261: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1262: fatal("%.200s line %d: Bad forwarding specification.",
1263: filename, linenum);
1.135 djm 1264:
1.88 stevesk 1265: if (*activep) {
1.168 stevesk 1266: if (opcode == oLocalForward ||
1267: opcode == oDynamicForward)
1.135 djm 1268: add_local_forward(options, &fwd);
1.88 stevesk 1269: else if (opcode == oRemoteForward)
1.135 djm 1270: add_remote_forward(options, &fwd);
1.88 stevesk 1271: }
1.17 markus 1272: break;
1.71 markus 1273:
1.90 stevesk 1274: case oClearAllForwardings:
1275: intptr = &options->clear_forwardings;
1276: goto parse_flag;
1277:
1.17 markus 1278: case oHost:
1.206 djm 1279: if (cmdline)
1280: fatal("Host directive not supported as a command-line "
1281: "option");
1.17 markus 1282: *activep = 0;
1.191 djm 1283: arg2 = NULL;
1284: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.252 djm 1285: if ((flags & SSHCONF_NEVERMATCH) != 0)
1286: break;
1.191 djm 1287: negated = *arg == '!';
1288: if (negated)
1289: arg++;
1.38 provos 1290: if (match_pattern(host, arg)) {
1.191 djm 1291: if (negated) {
1292: debug("%.200s line %d: Skipping Host "
1293: "block because of negated match "
1294: "for %.100s", filename, linenum,
1295: arg);
1296: *activep = 0;
1297: break;
1298: }
1299: if (!*activep)
1300: arg2 = arg; /* logged below */
1.17 markus 1301: *activep = 1;
1302: }
1.191 djm 1303: }
1304: if (*activep)
1305: debug("%.200s line %d: Applying options for %.100s",
1306: filename, linenum, arg2);
1.42 provos 1307: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1308: return 0;
1309:
1.206 djm 1310: case oMatch:
1311: if (cmdline)
1312: fatal("Host directive not supported as a command-line "
1313: "option");
1.221 djm 1314: value = match_cfg_line(options, &s, pw, host, original_host,
1315: flags & SSHCONF_POSTCANON, filename, linenum);
1.206 djm 1316: if (value < 0)
1317: fatal("%.200s line %d: Bad Match condition", filename,
1318: linenum);
1.252 djm 1319: *activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
1.206 djm 1320: break;
1321:
1.17 markus 1322: case oEscapeChar:
1323: intptr = &options->escape_char;
1.42 provos 1324: arg = strdelim(&s);
1.40 ho 1325: if (!arg || *arg == '\0')
1.17 markus 1326: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.236 djm 1327: if (strcmp(arg, "none") == 0)
1328: value = SSH_ESCAPECHAR_NONE;
1329: else if (arg[1] == '\0')
1330: value = (u_char) arg[0];
1331: else if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1332: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1333: value = (u_char) arg[1] & 31;
1.17 markus 1334: else {
1335: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1336: filename, linenum);
1.17 markus 1337: /* NOTREACHED */
1338: value = 0; /* Avoid compiler warning. */
1339: }
1340: if (*activep && *intptr == -1)
1341: *intptr = value;
1.112 djm 1342: break;
1343:
1344: case oAddressFamily:
1.114 djm 1345: intptr = &options->address_family;
1.207 djm 1346: multistate_ptr = multistate_addressfamily;
1347: goto parse_multistate;
1.17 markus 1348:
1.101 markus 1349: case oEnableSSHKeysign:
1350: intptr = &options->enable_ssh_keysign;
1351: goto parse_flag;
1352:
1.128 markus 1353: case oIdentitiesOnly:
1354: intptr = &options->identities_only;
1355: goto parse_flag;
1356:
1.127 markus 1357: case oServerAliveInterval:
1358: intptr = &options->server_alive_interval;
1359: goto parse_time;
1360:
1361: case oServerAliveCountMax:
1362: intptr = &options->server_alive_count_max;
1363: goto parse_int;
1364:
1.130 djm 1365: case oSendEnv:
1366: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1367: if (strchr(arg, '=') != NULL)
1368: fatal("%s line %d: Invalid environment name.",
1369: filename, linenum);
1.137 djm 1370: if (!*activep)
1371: continue;
1.130 djm 1372: if (options->num_send_env >= MAX_SEND_ENV)
1373: fatal("%s line %d: too many send env.",
1374: filename, linenum);
1375: options->send_env[options->num_send_env++] =
1376: xstrdup(arg);
1377: }
1378: break;
1379:
1.132 djm 1380: case oControlPath:
1381: charptr = &options->control_path;
1382: goto parse_string;
1383:
1384: case oControlMaster:
1385: intptr = &options->control_master;
1.207 djm 1386: multistate_ptr = multistate_controlmaster;
1387: goto parse_multistate;
1.132 djm 1388:
1.187 djm 1389: case oControlPersist:
1390: /* no/false/yes/true, or a time spec */
1391: intptr = &options->control_persist;
1392: arg = strdelim(&s);
1393: if (!arg || *arg == '\0')
1394: fatal("%.200s line %d: Missing ControlPersist"
1395: " argument.", filename, linenum);
1396: value = 0;
1397: value2 = 0; /* timeout */
1398: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1399: value = 0;
1400: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1401: value = 1;
1402: else if ((value2 = convtime(arg)) >= 0)
1403: value = 1;
1404: else
1405: fatal("%.200s line %d: Bad ControlPersist argument.",
1406: filename, linenum);
1407: if (*activep && *intptr == -1) {
1408: *intptr = value;
1409: options->control_persist_timeout = value2;
1410: }
1411: break;
1412:
1.136 djm 1413: case oHashKnownHosts:
1414: intptr = &options->hash_known_hosts;
1415: goto parse_flag;
1416:
1.144 reyk 1417: case oTunnel:
1418: intptr = &options->tun_open;
1.207 djm 1419: multistate_ptr = multistate_tunnel;
1420: goto parse_multistate;
1.144 reyk 1421:
1422: case oTunnelDevice:
1423: arg = strdelim(&s);
1424: if (!arg || *arg == '\0')
1425: fatal("%.200s line %d: Missing argument.", filename, linenum);
1426: value = a2tun(arg, &value2);
1.145 reyk 1427: if (value == SSH_TUNID_ERR)
1.144 reyk 1428: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1429: if (*activep) {
1430: options->tun_local = value;
1431: options->tun_remote = value2;
1432: }
1433: break;
1434:
1435: case oLocalCommand:
1436: charptr = &options->local_command;
1437: goto parse_command;
1438:
1439: case oPermitLocalCommand:
1440: intptr = &options->permit_local_command;
1441: goto parse_flag;
1442:
1.167 grunk 1443: case oVisualHostKey:
1444: intptr = &options->visual_host_key;
1445: goto parse_flag;
1446:
1.252 djm 1447: case oInclude:
1448: if (cmdline)
1449: fatal("Include directive not supported as a "
1450: "command-line option");
1451: value = 0;
1452: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1453: /*
1454: * Ensure all paths are anchored. User configuration
1455: * files may begin with '~/' but system configurations
1456: * must not. If the path is relative, then treat it
1457: * as living in ~/.ssh for user configurations or
1458: * /etc/ssh for system ones.
1459: */
1460: if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0)
1461: fatal("%.200s line %d: bad include path %s.",
1462: filename, linenum, arg);
1463: if (*arg != '/' && *arg != '~') {
1464: xasprintf(&arg2, "%s/%s",
1465: (flags & SSHCONF_USERCONF) ?
1466: "~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
1467: } else
1468: arg2 = xstrdup(arg);
1469: memset(&gl, 0, sizeof(gl));
1470: r = glob(arg2, GLOB_TILDE, NULL, &gl);
1471: if (r == GLOB_NOMATCH) {
1472: debug("%.200s line %d: include %s matched no "
1473: "files",filename, linenum, arg2);
1474: continue;
1475: } else if (r != 0 || gl.gl_pathc < 0)
1476: fatal("%.200s line %d: glob failed for %s.",
1477: filename, linenum, arg2);
1478: free(arg2);
1479: oactive = *activep;
1480: for (i = 0; i < (u_int)gl.gl_pathc; i++) {
1481: debug3("%.200s line %d: Including file %s "
1482: "depth %d%s", filename, linenum,
1483: gl.gl_pathv[i], depth,
1484: oactive ? "" : " (parse only)");
1485: r = read_config_file_depth(gl.gl_pathv[i],
1486: pw, host, original_host, options,
1487: flags | SSHCONF_CHECKPERM |
1488: (oactive ? 0 : SSHCONF_NEVERMATCH),
1489: activep, depth + 1);
1.264 djm 1490: if (r != 1 && errno != ENOENT) {
1.263 djm 1491: fatal("Can't open user config file "
1492: "%.100s: %.100s", gl.gl_pathv[i],
1493: strerror(errno));
1494: }
1.252 djm 1495: /*
1496: * don't let Match in includes clobber the
1497: * containing file's Match state.
1498: */
1499: *activep = oactive;
1500: if (r != 1)
1501: value = -1;
1502: }
1503: globfree(&gl);
1504: }
1505: if (value != 0)
1506: return value;
1507: break;
1508:
1.190 djm 1509: case oIPQoS:
1510: arg = strdelim(&s);
1511: if ((value = parse_ipqos(arg)) == -1)
1512: fatal("%s line %d: Bad IPQoS value: %s",
1513: filename, linenum, arg);
1514: arg = strdelim(&s);
1515: if (arg == NULL)
1516: value2 = value;
1517: else if ((value2 = parse_ipqos(arg)) == -1)
1518: fatal("%s line %d: Bad IPQoS value: %s",
1519: filename, linenum, arg);
1520: if (*activep) {
1521: options->ip_qos_interactive = value;
1522: options->ip_qos_bulk = value2;
1523: }
1524: break;
1525:
1.192 djm 1526: case oRequestTTY:
1527: intptr = &options->request_tty;
1.207 djm 1528: multistate_ptr = multistate_requesttty;
1529: goto parse_multistate;
1.192 djm 1530:
1.199 djm 1531: case oIgnoreUnknown:
1532: charptr = &options->ignored_unknown;
1533: goto parse_string;
1534:
1.205 djm 1535: case oProxyUseFdpass:
1536: intptr = &options->proxy_use_fdpass;
1537: goto parse_flag;
1538:
1.208 djm 1539: case oCanonicalDomains:
1540: value = options->num_canonical_domains != 0;
1541: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1542: valid_domain(arg, filename, linenum);
1543: if (!*activep || value)
1544: continue;
1545: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1546: fatal("%s line %d: too many hostname suffixes.",
1547: filename, linenum);
1548: options->canonical_domains[
1549: options->num_canonical_domains++] = xstrdup(arg);
1550: }
1551: break;
1552:
1.209 djm 1553: case oCanonicalizePermittedCNAMEs:
1.208 djm 1554: value = options->num_permitted_cnames != 0;
1555: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1556: /* Either '*' for everything or 'list:list' */
1557: if (strcmp(arg, "*") == 0)
1558: arg2 = arg;
1559: else {
1560: lowercase(arg);
1561: if ((arg2 = strchr(arg, ':')) == NULL ||
1562: arg2[1] == '\0') {
1563: fatal("%s line %d: "
1564: "Invalid permitted CNAME \"%s\"",
1565: filename, linenum, arg);
1566: }
1567: *arg2 = '\0';
1568: arg2++;
1569: }
1570: if (!*activep || value)
1571: continue;
1572: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1573: fatal("%s line %d: too many permitted CNAMEs.",
1574: filename, linenum);
1575: cname = options->permitted_cnames +
1576: options->num_permitted_cnames++;
1577: cname->source_list = xstrdup(arg);
1578: cname->target_list = xstrdup(arg2);
1579: }
1580: break;
1581:
1.209 djm 1582: case oCanonicalizeHostname:
1583: intptr = &options->canonicalize_hostname;
1584: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1585: goto parse_multistate;
1586:
1.209 djm 1587: case oCanonicalizeMaxDots:
1588: intptr = &options->canonicalize_max_dots;
1.208 djm 1589: goto parse_int;
1590:
1.209 djm 1591: case oCanonicalizeFallbackLocal:
1592: intptr = &options->canonicalize_fallback_local;
1.208 djm 1593: goto parse_flag;
1594:
1.220 millert 1595: case oStreamLocalBindMask:
1596: arg = strdelim(&s);
1597: if (!arg || *arg == '\0')
1598: fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum);
1599: /* Parse mode in octal format */
1600: value = strtol(arg, &endofnumber, 8);
1601: if (arg == endofnumber || value < 0 || value > 0777)
1602: fatal("%.200s line %d: Bad mask.", filename, linenum);
1603: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1604: break;
1605:
1606: case oStreamLocalBindUnlink:
1607: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1608: goto parse_flag;
1609:
1.223 djm 1610: case oRevokedHostKeys:
1611: charptr = &options->revoked_host_keys;
1612: goto parse_string;
1613:
1.224 djm 1614: case oFingerprintHash:
1.225 djm 1615: intptr = &options->fingerprint_hash;
1.224 djm 1616: arg = strdelim(&s);
1617: if (!arg || *arg == '\0')
1618: fatal("%.200s line %d: Missing argument.",
1619: filename, linenum);
1620: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1621: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1622: filename, linenum, arg);
1.225 djm 1623: if (*activep && *intptr == -1)
1624: *intptr = value;
1.224 djm 1625: break;
1626:
1.229 djm 1627: case oUpdateHostkeys:
1628: intptr = &options->update_hostkeys;
1.232 djm 1629: multistate_ptr = multistate_yesnoask;
1630: goto parse_multistate;
1.229 djm 1631:
1.230 djm 1632: case oHostbasedKeyTypes:
1633: charptr = &options->hostbased_key_types;
1.238 markus 1634: goto parse_keytypes;
1635:
1636: case oPubkeyAcceptedKeyTypes:
1637: charptr = &options->pubkey_key_types;
1638: goto parse_keytypes;
1.230 djm 1639:
1.246 jcs 1640: case oAddKeysToAgent:
1641: intptr = &options->add_keys_to_agent;
1642: multistate_ptr = multistate_yesnoaskconfirm;
1643: goto parse_multistate;
1644:
1.253 markus 1645: case oIdentityAgent:
1646: charptr = &options->identity_agent;
1647: goto parse_string;
1648:
1.96 markus 1649: case oDeprecated:
1.98 markus 1650: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1651: filename, linenum, keyword);
1.98 markus 1652: return 0;
1.96 markus 1653:
1.110 jakob 1654: case oUnsupported:
1655: error("%s line %d: Unsupported option \"%s\"",
1656: filename, linenum, keyword);
1657: return 0;
1658:
1.17 markus 1659: default:
1.221 djm 1660: fatal("%s: Unimplemented opcode %d", __func__, opcode);
1.17 markus 1661: }
1662:
1663: /* Check that there is no garbage at end of line. */
1.57 djm 1664: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1665: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1666: filename, linenum, arg);
1.39 ho 1667: }
1.17 markus 1668: return 0;
1.1 deraadt 1669: }
1670:
1.19 markus 1671: /*
1672: * Reads the config file and modifies the options accordingly. Options
1673: * should already be initialized before this call. This never returns if
1.89 stevesk 1674: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1675: */
1.89 stevesk 1676: int
1.206 djm 1677: read_config_file(const char *filename, struct passwd *pw, const char *host,
1.221 djm 1678: const char *original_host, Options *options, int flags)
1.1 deraadt 1679: {
1.252 djm 1680: int active = 1;
1681:
1682: return read_config_file_depth(filename, pw, host, original_host,
1683: options, flags, &active, 0);
1684: }
1685:
1686: #define READCONF_MAX_DEPTH 16
1687: static int
1688: read_config_file_depth(const char *filename, struct passwd *pw,
1689: const char *host, const char *original_host, Options *options,
1690: int flags, int *activep, int depth)
1691: {
1.17 markus 1692: FILE *f;
1693: char line[1024];
1.252 djm 1694: int linenum;
1.17 markus 1695: int bad_options = 0;
1696:
1.252 djm 1697: if (depth < 0 || depth > READCONF_MAX_DEPTH)
1698: fatal("Too many recursive configuration includes");
1699:
1.129 djm 1700: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1701: return 0;
1.129 djm 1702:
1.196 dtucker 1703: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1704: struct stat sb;
1.134 deraadt 1705:
1.131 dtucker 1706: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1707: fatal("fstat %s: %s", filename, strerror(errno));
1708: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1709: (sb.st_mode & 022) != 0))
1.129 djm 1710: fatal("Bad owner or permissions on %s", filename);
1711: }
1.17 markus 1712:
1713: debug("Reading configuration data %.200s", filename);
1714:
1.19 markus 1715: /*
1716: * Mark that we are now processing the options. This flag is turned
1717: * on/off by Host specifications.
1718: */
1.17 markus 1719: linenum = 0;
1720: while (fgets(line, sizeof(line), f)) {
1721: /* Update line number counter. */
1722: linenum++;
1.252 djm 1723: if (process_config_line_depth(options, pw, host, original_host,
1724: line, filename, linenum, activep, flags, depth) != 0)
1.17 markus 1725: bad_options++;
1726: }
1727: fclose(f);
1728: if (bad_options > 0)
1.64 millert 1729: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1730: filename, bad_options);
1.89 stevesk 1731: return 1;
1.1 deraadt 1732: }
1733:
1.218 djm 1734: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1735: int
1736: option_clear_or_none(const char *o)
1737: {
1738: return o == NULL || strcasecmp(o, "none") == 0;
1739: }
1740:
1.19 markus 1741: /*
1742: * Initializes options to special values that indicate that they have not yet
1743: * been set. Read_config_file will only set options with this value. Options
1744: * are processed in the following order: command line, user config file,
1745: * system config file. Last, fill_default_options is called.
1746: */
1.1 deraadt 1747:
1.26 markus 1748: void
1.17 markus 1749: initialize_options(Options * options)
1.1 deraadt 1750: {
1.17 markus 1751: memset(options, 'X', sizeof(*options));
1752: options->forward_agent = -1;
1753: options->forward_x11 = -1;
1.123 markus 1754: options->forward_x11_trusted = -1;
1.186 djm 1755: options->forward_x11_timeout = -1;
1.255 dtucker 1756: options->stdio_forward_host = NULL;
1757: options->stdio_forward_port = 0;
1.256 dtucker 1758: options->clear_forwardings = -1;
1.153 markus 1759: options->exit_on_forward_failure = -1;
1.34 markus 1760: options->xauth_location = NULL;
1.220 millert 1761: options->fwd_opts.gateway_ports = -1;
1762: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
1763: options->fwd_opts.streamlocal_bind_unlink = -1;
1.17 markus 1764: options->use_privileged_port = -1;
1765: options->rsa_authentication = -1;
1.50 markus 1766: options->pubkey_authentication = -1;
1.78 markus 1767: options->challenge_response_authentication = -1;
1.118 markus 1768: options->gss_authentication = -1;
1769: options->gss_deleg_creds = -1;
1.17 markus 1770: options->password_authentication = -1;
1.48 markus 1771: options->kbd_interactive_authentication = -1;
1772: options->kbd_interactive_devices = NULL;
1.17 markus 1773: options->rhosts_rsa_authentication = -1;
1.72 markus 1774: options->hostbased_authentication = -1;
1.17 markus 1775: options->batch_mode = -1;
1776: options->check_host_ip = -1;
1777: options->strict_host_key_checking = -1;
1778: options->compression = -1;
1.126 markus 1779: options->tcp_keep_alive = -1;
1.17 markus 1780: options->compression_level = -1;
1781: options->port = -1;
1.114 djm 1782: options->address_family = -1;
1.17 markus 1783: options->connection_attempts = -1;
1.111 djm 1784: options->connection_timeout = -1;
1.17 markus 1785: options->number_of_password_prompts = -1;
1786: options->cipher = -1;
1.25 markus 1787: options->ciphers = NULL;
1.62 markus 1788: options->macs = NULL;
1.189 djm 1789: options->kex_algorithms = NULL;
1.76 markus 1790: options->hostkeyalgorithms = NULL;
1.25 markus 1791: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1792: options->num_identity_files = 0;
1.241 djm 1793: options->num_certificate_files = 0;
1.17 markus 1794: options->hostname = NULL;
1.52 markus 1795: options->host_key_alias = NULL;
1.17 markus 1796: options->proxy_command = NULL;
1.257 djm 1797: options->jump_user = NULL;
1798: options->jump_host = NULL;
1799: options->jump_port = -1;
1800: options->jump_extra = NULL;
1.17 markus 1801: options->user = NULL;
1802: options->escape_char = -1;
1.193 djm 1803: options->num_system_hostfiles = 0;
1804: options->num_user_hostfiles = 0;
1.185 djm 1805: options->local_forwards = NULL;
1.17 markus 1806: options->num_local_forwards = 0;
1.185 djm 1807: options->remote_forwards = NULL;
1.17 markus 1808: options->num_remote_forwards = 0;
1.95 markus 1809: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1810: options->preferred_authentications = NULL;
1.77 markus 1811: options->bind_address = NULL;
1.183 markus 1812: options->pkcs11_provider = NULL;
1.101 markus 1813: options->enable_ssh_keysign = - 1;
1.91 markus 1814: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1815: options->identities_only = - 1;
1.105 markus 1816: options->rekey_limit = - 1;
1.198 dtucker 1817: options->rekey_interval = -1;
1.107 jakob 1818: options->verify_host_key_dns = -1;
1.127 markus 1819: options->server_alive_interval = -1;
1820: options->server_alive_count_max = -1;
1.130 djm 1821: options->num_send_env = 0;
1.132 djm 1822: options->control_path = NULL;
1823: options->control_master = -1;
1.187 djm 1824: options->control_persist = -1;
1825: options->control_persist_timeout = 0;
1.136 djm 1826: options->hash_known_hosts = -1;
1.144 reyk 1827: options->tun_open = -1;
1828: options->tun_local = -1;
1829: options->tun_remote = -1;
1830: options->local_command = NULL;
1831: options->permit_local_command = -1;
1.246 jcs 1832: options->add_keys_to_agent = -1;
1.253 markus 1833: options->identity_agent = NULL;
1.167 grunk 1834: options->visual_host_key = -1;
1.190 djm 1835: options->ip_qos_interactive = -1;
1836: options->ip_qos_bulk = -1;
1.192 djm 1837: options->request_tty = -1;
1.205 djm 1838: options->proxy_use_fdpass = -1;
1.199 djm 1839: options->ignored_unknown = NULL;
1.208 djm 1840: options->num_canonical_domains = 0;
1841: options->num_permitted_cnames = 0;
1.209 djm 1842: options->canonicalize_max_dots = -1;
1843: options->canonicalize_fallback_local = -1;
1844: options->canonicalize_hostname = -1;
1.223 djm 1845: options->revoked_host_keys = NULL;
1.224 djm 1846: options->fingerprint_hash = -1;
1.229 djm 1847: options->update_hostkeys = -1;
1.230 djm 1848: options->hostbased_key_types = NULL;
1.238 markus 1849: options->pubkey_key_types = NULL;
1.1 deraadt 1850: }
1851:
1.19 markus 1852: /*
1.218 djm 1853: * A petite version of fill_default_options() that just fills the options
1854: * needed for hostname canonicalization to proceed.
1855: */
1856: void
1857: fill_default_options_for_canonicalization(Options *options)
1858: {
1859: if (options->canonicalize_max_dots == -1)
1860: options->canonicalize_max_dots = 1;
1861: if (options->canonicalize_fallback_local == -1)
1862: options->canonicalize_fallback_local = 1;
1863: if (options->canonicalize_hostname == -1)
1864: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1865: }
1866:
1867: /*
1.19 markus 1868: * Called after processing other sources of option data, this fills those
1869: * options for which no value has been specified with their default values.
1870: */
1.26 markus 1871: void
1.17 markus 1872: fill_default_options(Options * options)
1.1 deraadt 1873: {
1.17 markus 1874: if (options->forward_agent == -1)
1.33 markus 1875: options->forward_agent = 0;
1.17 markus 1876: if (options->forward_x11 == -1)
1.23 markus 1877: options->forward_x11 = 0;
1.123 markus 1878: if (options->forward_x11_trusted == -1)
1879: options->forward_x11_trusted = 0;
1.186 djm 1880: if (options->forward_x11_timeout == -1)
1881: options->forward_x11_timeout = 1200;
1.256 dtucker 1882: /*
1883: * stdio forwarding (-W) changes the default for these but we defer
1884: * setting the values so they can be overridden.
1885: */
1.153 markus 1886: if (options->exit_on_forward_failure == -1)
1.256 dtucker 1887: options->exit_on_forward_failure =
1888: options->stdio_forward_host != NULL ? 1 : 0;
1889: if (options->clear_forwardings == -1)
1890: options->clear_forwardings =
1891: options->stdio_forward_host != NULL ? 1 : 0;
1892: if (options->clear_forwardings == 1)
1893: clear_forwardings(options);
1894:
1.34 markus 1895: if (options->xauth_location == NULL)
1.80 markus 1896: options->xauth_location = _PATH_XAUTH;
1.220 millert 1897: if (options->fwd_opts.gateway_ports == -1)
1898: options->fwd_opts.gateway_ports = 0;
1899: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
1900: options->fwd_opts.streamlocal_bind_mask = 0177;
1901: if (options->fwd_opts.streamlocal_bind_unlink == -1)
1902: options->fwd_opts.streamlocal_bind_unlink = 0;
1.17 markus 1903: if (options->use_privileged_port == -1)
1.65 markus 1904: options->use_privileged_port = 0;
1.17 markus 1905: if (options->rsa_authentication == -1)
1906: options->rsa_authentication = 1;
1.50 markus 1907: if (options->pubkey_authentication == -1)
1908: options->pubkey_authentication = 1;
1.78 markus 1909: if (options->challenge_response_authentication == -1)
1.83 markus 1910: options->challenge_response_authentication = 1;
1.118 markus 1911: if (options->gss_authentication == -1)
1.122 markus 1912: options->gss_authentication = 0;
1.118 markus 1913: if (options->gss_deleg_creds == -1)
1914: options->gss_deleg_creds = 0;
1.17 markus 1915: if (options->password_authentication == -1)
1916: options->password_authentication = 1;
1.48 markus 1917: if (options->kbd_interactive_authentication == -1)
1.59 markus 1918: options->kbd_interactive_authentication = 1;
1.17 markus 1919: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1920: options->rhosts_rsa_authentication = 0;
1.72 markus 1921: if (options->hostbased_authentication == -1)
1922: options->hostbased_authentication = 0;
1.17 markus 1923: if (options->batch_mode == -1)
1924: options->batch_mode = 0;
1925: if (options->check_host_ip == -1)
1926: options->check_host_ip = 1;
1927: if (options->strict_host_key_checking == -1)
1928: options->strict_host_key_checking = 2; /* 2 is default */
1929: if (options->compression == -1)
1930: options->compression = 0;
1.126 markus 1931: if (options->tcp_keep_alive == -1)
1932: options->tcp_keep_alive = 1;
1.17 markus 1933: if (options->compression_level == -1)
1934: options->compression_level = 6;
1935: if (options->port == -1)
1936: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1937: if (options->address_family == -1)
1938: options->address_family = AF_UNSPEC;
1.17 markus 1939: if (options->connection_attempts == -1)
1.84 markus 1940: options->connection_attempts = 1;
1.17 markus 1941: if (options->number_of_password_prompts == -1)
1942: options->number_of_password_prompts = 3;
1943: /* Selected in ssh_login(). */
1944: if (options->cipher == -1)
1945: options->cipher = SSH_CIPHER_NOT_SET;
1.76 markus 1946: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1947: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1948: options->protocol = SSH_PROTO_2;
1.246 jcs 1949: if (options->add_keys_to_agent == -1)
1950: options->add_keys_to_agent = 0;
1.17 markus 1951: if (options->num_identity_files == 0) {
1.50 markus 1952: if (options->protocol & SSH_PROTO_1) {
1.195 dtucker 1953: add_identity_file(options, "~/",
1954: _PATH_SSH_CLIENT_IDENTITY, 0);
1.50 markus 1955: }
1956: if (options->protocol & SSH_PROTO_2) {
1.195 dtucker 1957: add_identity_file(options, "~/",
1958: _PATH_SSH_CLIENT_ID_RSA, 0);
1959: add_identity_file(options, "~/",
1960: _PATH_SSH_CLIENT_ID_DSA, 0);
1961: add_identity_file(options, "~/",
1962: _PATH_SSH_CLIENT_ID_ECDSA, 0);
1.215 markus 1963: add_identity_file(options, "~/",
1964: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.50 markus 1965: }
1.27 markus 1966: }
1.17 markus 1967: if (options->escape_char == -1)
1968: options->escape_char = '~';
1.193 djm 1969: if (options->num_system_hostfiles == 0) {
1970: options->system_hostfiles[options->num_system_hostfiles++] =
1971: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1972: options->system_hostfiles[options->num_system_hostfiles++] =
1973: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1974: }
1975: if (options->num_user_hostfiles == 0) {
1976: options->user_hostfiles[options->num_user_hostfiles++] =
1977: xstrdup(_PATH_SSH_USER_HOSTFILE);
1978: options->user_hostfiles[options->num_user_hostfiles++] =
1979: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1980: }
1.95 markus 1981: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1982: options->log_level = SYSLOG_LEVEL_INFO;
1.91 markus 1983: if (options->no_host_authentication_for_localhost == - 1)
1984: options->no_host_authentication_for_localhost = 0;
1.128 markus 1985: if (options->identities_only == -1)
1986: options->identities_only = 0;
1.101 markus 1987: if (options->enable_ssh_keysign == -1)
1988: options->enable_ssh_keysign = 0;
1.105 markus 1989: if (options->rekey_limit == -1)
1990: options->rekey_limit = 0;
1.198 dtucker 1991: if (options->rekey_interval == -1)
1992: options->rekey_interval = 0;
1.107 jakob 1993: if (options->verify_host_key_dns == -1)
1994: options->verify_host_key_dns = 0;
1.127 markus 1995: if (options->server_alive_interval == -1)
1996: options->server_alive_interval = 0;
1997: if (options->server_alive_count_max == -1)
1998: options->server_alive_count_max = 3;
1.132 djm 1999: if (options->control_master == -1)
2000: options->control_master = 0;
1.187 djm 2001: if (options->control_persist == -1) {
2002: options->control_persist = 0;
2003: options->control_persist_timeout = 0;
2004: }
1.136 djm 2005: if (options->hash_known_hosts == -1)
2006: options->hash_known_hosts = 0;
1.144 reyk 2007: if (options->tun_open == -1)
1.145 reyk 2008: options->tun_open = SSH_TUNMODE_NO;
2009: if (options->tun_local == -1)
2010: options->tun_local = SSH_TUNID_ANY;
2011: if (options->tun_remote == -1)
2012: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 2013: if (options->permit_local_command == -1)
2014: options->permit_local_command = 0;
1.167 grunk 2015: if (options->visual_host_key == -1)
2016: options->visual_host_key = 0;
1.190 djm 2017: if (options->ip_qos_interactive == -1)
2018: options->ip_qos_interactive = IPTOS_LOWDELAY;
2019: if (options->ip_qos_bulk == -1)
2020: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 2021: if (options->request_tty == -1)
2022: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 2023: if (options->proxy_use_fdpass == -1)
2024: options->proxy_use_fdpass = 0;
1.209 djm 2025: if (options->canonicalize_max_dots == -1)
2026: options->canonicalize_max_dots = 1;
2027: if (options->canonicalize_fallback_local == -1)
2028: options->canonicalize_fallback_local = 1;
2029: if (options->canonicalize_hostname == -1)
2030: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.224 djm 2031: if (options->fingerprint_hash == -1)
2032: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.229 djm 2033: if (options->update_hostkeys == -1)
1.231 djm 2034: options->update_hostkeys = 0;
1.239 djm 2035: if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 ||
2036: kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 ||
2037: kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 ||
2038: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2039: &options->hostbased_key_types) != 0 ||
2040: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2041: &options->pubkey_key_types) != 0)
2042: fatal("%s: kex_assemble_names failed", __func__);
1.224 djm 2043:
1.207 djm 2044: #define CLEAR_ON_NONE(v) \
2045: do { \
1.218 djm 2046: if (option_clear_or_none(v)) { \
1.207 djm 2047: free(v); \
2048: v = NULL; \
2049: } \
2050: } while(0)
2051: CLEAR_ON_NONE(options->local_command);
2052: CLEAR_ON_NONE(options->proxy_command);
2053: CLEAR_ON_NONE(options->control_path);
1.223 djm 2054: CLEAR_ON_NONE(options->revoked_host_keys);
1.254 markus 2055: /* options->identity_agent distinguishes NULL from 'none' */
1.17 markus 2056: /* options->user will be set in the main program if appropriate */
2057: /* options->hostname will be set in the main program if appropriate */
1.52 markus 2058: /* options->host_key_alias should not be set by default */
1.67 markus 2059: /* options->preferred_authentications will be set in ssh */
1.135 djm 2060: }
2061:
1.220 millert 2062: struct fwdarg {
2063: char *arg;
2064: int ispath;
2065: };
2066:
2067: /*
2068: * parse_fwd_field
2069: * parses the next field in a port forwarding specification.
2070: * sets fwd to the parsed field and advances p past the colon
2071: * or sets it to NULL at end of string.
2072: * returns 0 on success, else non-zero.
2073: */
2074: static int
2075: parse_fwd_field(char **p, struct fwdarg *fwd)
2076: {
2077: char *ep, *cp = *p;
2078: int ispath = 0;
2079:
2080: if (*cp == '\0') {
2081: *p = NULL;
2082: return -1; /* end of string */
2083: }
2084:
2085: /*
2086: * A field escaped with square brackets is used literally.
2087: * XXX - allow ']' to be escaped via backslash?
2088: */
2089: if (*cp == '[') {
2090: /* find matching ']' */
2091: for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
2092: if (*ep == '/')
2093: ispath = 1;
2094: }
2095: /* no matching ']' or not at end of field. */
2096: if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
2097: return -1;
2098: /* NUL terminate the field and advance p past the colon */
2099: *ep++ = '\0';
2100: if (*ep != '\0')
2101: *ep++ = '\0';
2102: fwd->arg = cp + 1;
2103: fwd->ispath = ispath;
2104: *p = ep;
2105: return 0;
2106: }
2107:
2108: for (cp = *p; *cp != '\0'; cp++) {
2109: switch (*cp) {
2110: case '\\':
2111: memmove(cp, cp + 1, strlen(cp + 1) + 1);
1.237 djm 2112: if (*cp == '\0')
2113: return -1;
1.220 millert 2114: break;
2115: case '/':
2116: ispath = 1;
2117: break;
2118: case ':':
2119: *cp++ = '\0';
2120: goto done;
2121: }
2122: }
2123: done:
2124: fwd->arg = *p;
2125: fwd->ispath = ispath;
2126: *p = cp;
2127: return 0;
2128: }
2129:
1.135 djm 2130: /*
2131: * parse_forward
2132: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 2133: * dynamicfwd == 0
1.220 millert 2134: * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
2135: * listenpath:connectpath
1.168 stevesk 2136: * dynamicfwd == 1
2137: * [listenhost:]listenport
1.135 djm 2138: * returns number of arguments parsed or zero on error
2139: */
2140: int
1.220 millert 2141: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 2142: {
1.220 millert 2143: struct fwdarg fwdargs[4];
2144: char *p, *cp;
1.135 djm 2145: int i;
2146:
1.220 millert 2147: memset(fwd, 0, sizeof(*fwd));
2148: memset(fwdargs, 0, sizeof(fwdargs));
1.135 djm 2149:
2150: cp = p = xstrdup(fwdspec);
2151:
2152: /* skip leading spaces */
1.214 deraadt 2153: while (isspace((u_char)*cp))
1.135 djm 2154: cp++;
2155:
1.220 millert 2156: for (i = 0; i < 4; ++i) {
2157: if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.135 djm 2158: break;
1.220 millert 2159: }
1.135 djm 2160:
1.170 stevesk 2161: /* Check for trailing garbage */
1.220 millert 2162: if (cp != NULL && *cp != '\0') {
1.135 djm 2163: i = 0; /* failure */
1.220 millert 2164: }
1.135 djm 2165:
2166: switch (i) {
1.168 stevesk 2167: case 1:
1.220 millert 2168: if (fwdargs[0].ispath) {
2169: fwd->listen_path = xstrdup(fwdargs[0].arg);
2170: fwd->listen_port = PORT_STREAMLOCAL;
2171: } else {
2172: fwd->listen_host = NULL;
2173: fwd->listen_port = a2port(fwdargs[0].arg);
2174: }
1.168 stevesk 2175: fwd->connect_host = xstrdup("socks");
2176: break;
2177:
2178: case 2:
1.220 millert 2179: if (fwdargs[0].ispath && fwdargs[1].ispath) {
2180: fwd->listen_path = xstrdup(fwdargs[0].arg);
2181: fwd->listen_port = PORT_STREAMLOCAL;
2182: fwd->connect_path = xstrdup(fwdargs[1].arg);
2183: fwd->connect_port = PORT_STREAMLOCAL;
2184: } else if (fwdargs[1].ispath) {
2185: fwd->listen_host = NULL;
2186: fwd->listen_port = a2port(fwdargs[0].arg);
2187: fwd->connect_path = xstrdup(fwdargs[1].arg);
2188: fwd->connect_port = PORT_STREAMLOCAL;
2189: } else {
2190: fwd->listen_host = xstrdup(fwdargs[0].arg);
2191: fwd->listen_port = a2port(fwdargs[1].arg);
2192: fwd->connect_host = xstrdup("socks");
2193: }
1.168 stevesk 2194: break;
2195:
1.135 djm 2196: case 3:
1.220 millert 2197: if (fwdargs[0].ispath) {
2198: fwd->listen_path = xstrdup(fwdargs[0].arg);
2199: fwd->listen_port = PORT_STREAMLOCAL;
2200: fwd->connect_host = xstrdup(fwdargs[1].arg);
2201: fwd->connect_port = a2port(fwdargs[2].arg);
2202: } else if (fwdargs[2].ispath) {
2203: fwd->listen_host = xstrdup(fwdargs[0].arg);
2204: fwd->listen_port = a2port(fwdargs[1].arg);
2205: fwd->connect_path = xstrdup(fwdargs[2].arg);
2206: fwd->connect_port = PORT_STREAMLOCAL;
2207: } else {
2208: fwd->listen_host = NULL;
2209: fwd->listen_port = a2port(fwdargs[0].arg);
2210: fwd->connect_host = xstrdup(fwdargs[1].arg);
2211: fwd->connect_port = a2port(fwdargs[2].arg);
2212: }
1.135 djm 2213: break;
2214:
2215: case 4:
1.220 millert 2216: fwd->listen_host = xstrdup(fwdargs[0].arg);
2217: fwd->listen_port = a2port(fwdargs[1].arg);
2218: fwd->connect_host = xstrdup(fwdargs[2].arg);
2219: fwd->connect_port = a2port(fwdargs[3].arg);
1.135 djm 2220: break;
2221: default:
2222: i = 0; /* failure */
2223: }
2224:
1.202 djm 2225: free(p);
1.135 djm 2226:
1.168 stevesk 2227: if (dynamicfwd) {
2228: if (!(i == 1 || i == 2))
2229: goto fail_free;
2230: } else {
1.220 millert 2231: if (!(i == 3 || i == 4)) {
2232: if (fwd->connect_path == NULL &&
2233: fwd->listen_path == NULL)
2234: goto fail_free;
2235: }
2236: if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.168 stevesk 2237: goto fail_free;
2238: }
2239:
1.220 millert 2240: if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
2241: (!remotefwd && fwd->listen_port == 0))
1.135 djm 2242: goto fail_free;
2243: if (fwd->connect_host != NULL &&
2244: strlen(fwd->connect_host) >= NI_MAXHOST)
2245: goto fail_free;
1.220 millert 2246: /* XXX - if connecting to a remote socket, max sun len may not match this host */
2247: if (fwd->connect_path != NULL &&
2248: strlen(fwd->connect_path) >= PATH_MAX_SUN)
2249: goto fail_free;
1.176 djm 2250: if (fwd->listen_host != NULL &&
2251: strlen(fwd->listen_host) >= NI_MAXHOST)
2252: goto fail_free;
1.220 millert 2253: if (fwd->listen_path != NULL &&
2254: strlen(fwd->listen_path) >= PATH_MAX_SUN)
2255: goto fail_free;
1.135 djm 2256:
2257: return (i);
2258:
2259: fail_free:
1.202 djm 2260: free(fwd->connect_host);
2261: fwd->connect_host = NULL;
1.220 millert 2262: free(fwd->connect_path);
2263: fwd->connect_path = NULL;
1.202 djm 2264: free(fwd->listen_host);
2265: fwd->listen_host = NULL;
1.220 millert 2266: free(fwd->listen_path);
2267: fwd->listen_path = NULL;
1.135 djm 2268: return (0);
1.221 djm 2269: }
2270:
1.257 djm 2271: int
2272: parse_jump(const char *s, Options *o, int active)
2273: {
2274: char *orig, *sdup, *cp;
2275: char *host = NULL, *user = NULL;
1.258 naddy 2276: int ret = -1, port = -1, first;
1.257 djm 2277:
2278: active &= o->proxy_command == NULL && o->jump_host == NULL;
2279:
2280: orig = sdup = xstrdup(s);
1.258 naddy 2281: first = active;
1.259 djm 2282: do {
2283: if ((cp = strrchr(sdup, ',')) == NULL)
2284: cp = sdup; /* last */
2285: else
2286: *cp++ = '\0';
2287:
1.258 naddy 2288: if (first) {
1.257 djm 2289: /* First argument and configuration is active */
2290: if (parse_user_host_port(cp, &user, &host, &port) != 0)
2291: goto out;
2292: } else {
2293: /* Subsequent argument or inactive configuration */
2294: if (parse_user_host_port(cp, NULL, NULL, NULL) != 0)
2295: goto out;
2296: }
1.258 naddy 2297: first = 0; /* only check syntax for subsequent hosts */
1.259 djm 2298: } while (cp != sdup);
1.257 djm 2299: /* success */
1.258 naddy 2300: if (active) {
2301: o->jump_user = user;
2302: o->jump_host = host;
2303: o->jump_port = port;
2304: o->proxy_command = xstrdup("none");
2305: user = host = NULL;
1.259 djm 2306: if ((cp = strrchr(s, ',')) != NULL && cp != s) {
2307: o->jump_extra = xstrdup(s);
2308: o->jump_extra[cp - s] = '\0';
2309: }
1.258 naddy 2310: }
1.257 djm 2311: ret = 0;
2312: out:
1.258 naddy 2313: free(orig);
1.257 djm 2314: free(user);
2315: free(host);
2316: return ret;
2317: }
2318:
1.221 djm 2319: /* XXX the following is a near-vebatim copy from servconf.c; refactor */
2320: static const char *
2321: fmt_multistate_int(int val, const struct multistate *m)
2322: {
2323: u_int i;
2324:
2325: for (i = 0; m[i].key != NULL; i++) {
2326: if (m[i].value == val)
2327: return m[i].key;
2328: }
2329: return "UNKNOWN";
2330: }
2331:
2332: static const char *
2333: fmt_intarg(OpCodes code, int val)
2334: {
2335: if (val == -1)
2336: return "unset";
2337: switch (code) {
2338: case oAddressFamily:
2339: return fmt_multistate_int(val, multistate_addressfamily);
2340: case oVerifyHostKeyDNS:
2341: case oStrictHostKeyChecking:
1.232 djm 2342: case oUpdateHostkeys:
1.221 djm 2343: return fmt_multistate_int(val, multistate_yesnoask);
2344: case oControlMaster:
2345: return fmt_multistate_int(val, multistate_controlmaster);
2346: case oTunnel:
2347: return fmt_multistate_int(val, multistate_tunnel);
2348: case oRequestTTY:
2349: return fmt_multistate_int(val, multistate_requesttty);
2350: case oCanonicalizeHostname:
2351: return fmt_multistate_int(val, multistate_canonicalizehostname);
1.224 djm 2352: case oFingerprintHash:
2353: return ssh_digest_alg_name(val);
1.221 djm 2354: case oProtocol:
2355: switch (val) {
2356: case SSH_PROTO_1:
2357: return "1";
2358: case SSH_PROTO_2:
2359: return "2";
2360: case (SSH_PROTO_1|SSH_PROTO_2):
2361: return "2,1";
2362: default:
2363: return "UNKNOWN";
2364: }
2365: default:
2366: switch (val) {
2367: case 0:
2368: return "no";
2369: case 1:
2370: return "yes";
2371: default:
2372: return "UNKNOWN";
2373: }
2374: }
2375: }
2376:
2377: static const char *
2378: lookup_opcode_name(OpCodes code)
2379: {
2380: u_int i;
2381:
2382: for (i = 0; keywords[i].name != NULL; i++)
2383: if (keywords[i].opcode == code)
2384: return(keywords[i].name);
2385: return "UNKNOWN";
2386: }
2387:
2388: static void
2389: dump_cfg_int(OpCodes code, int val)
2390: {
2391: printf("%s %d\n", lookup_opcode_name(code), val);
2392: }
2393:
2394: static void
2395: dump_cfg_fmtint(OpCodes code, int val)
2396: {
2397: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2398: }
2399:
2400: static void
2401: dump_cfg_string(OpCodes code, const char *val)
2402: {
2403: if (val == NULL)
2404: return;
2405: printf("%s %s\n", lookup_opcode_name(code), val);
2406: }
2407:
2408: static void
2409: dump_cfg_strarray(OpCodes code, u_int count, char **vals)
2410: {
2411: u_int i;
2412:
2413: for (i = 0; i < count; i++)
2414: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2415: }
2416:
2417: static void
2418: dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
2419: {
2420: u_int i;
2421:
2422: printf("%s", lookup_opcode_name(code));
2423: for (i = 0; i < count; i++)
2424: printf(" %s", vals[i]);
2425: printf("\n");
2426: }
2427:
2428: static void
2429: dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
2430: {
2431: const struct Forward *fwd;
2432: u_int i;
2433:
2434: /* oDynamicForward */
2435: for (i = 0; i < count; i++) {
2436: fwd = &fwds[i];
1.265 ! djm 2437: if (code == oDynamicForward && fwd->connect_host != NULL &&
1.221 djm 2438: strcmp(fwd->connect_host, "socks") != 0)
2439: continue;
1.265 ! djm 2440: if (code == oLocalForward && fwd->connect_host != NULL &&
1.221 djm 2441: strcmp(fwd->connect_host, "socks") == 0)
2442: continue;
2443: printf("%s", lookup_opcode_name(code));
2444: if (fwd->listen_port == PORT_STREAMLOCAL)
2445: printf(" %s", fwd->listen_path);
2446: else if (fwd->listen_host == NULL)
2447: printf(" %d", fwd->listen_port);
2448: else {
2449: printf(" [%s]:%d",
2450: fwd->listen_host, fwd->listen_port);
2451: }
2452: if (code != oDynamicForward) {
2453: if (fwd->connect_port == PORT_STREAMLOCAL)
2454: printf(" %s", fwd->connect_path);
2455: else if (fwd->connect_host == NULL)
2456: printf(" %d", fwd->connect_port);
2457: else {
2458: printf(" [%s]:%d",
2459: fwd->connect_host, fwd->connect_port);
2460: }
2461: }
2462: printf("\n");
2463: }
2464: }
2465:
2466: void
2467: dump_client_config(Options *o, const char *host)
2468: {
2469: int i;
1.257 djm 2470: char buf[8];
1.221 djm 2471:
1.240 djm 2472: /* This is normally prepared in ssh_kex2 */
2473: if (kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->hostkeyalgorithms) != 0)
2474: fatal("%s: kex_assemble_names failed", __func__);
2475:
1.221 djm 2476: /* Most interesting options first: user, host, port */
2477: dump_cfg_string(oUser, o->user);
2478: dump_cfg_string(oHostName, host);
2479: dump_cfg_int(oPort, o->port);
2480:
2481: /* Flag options */
2482: dump_cfg_fmtint(oAddressFamily, o->address_family);
2483: dump_cfg_fmtint(oBatchMode, o->batch_mode);
2484: dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
2485: dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
2486: dump_cfg_fmtint(oChallengeResponseAuthentication, o->challenge_response_authentication);
2487: dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
2488: dump_cfg_fmtint(oCompression, o->compression);
2489: dump_cfg_fmtint(oControlMaster, o->control_master);
2490: dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
1.256 dtucker 2491: dump_cfg_fmtint(oClearAllForwardings, o->clear_forwardings);
1.221 djm 2492: dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
1.224 djm 2493: dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
1.221 djm 2494: dump_cfg_fmtint(oForwardAgent, o->forward_agent);
2495: dump_cfg_fmtint(oForwardX11, o->forward_x11);
2496: dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
2497: dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
2498: #ifdef GSSAPI
2499: dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
2500: dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
2501: #endif /* GSSAPI */
2502: dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
2503: dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
2504: dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
2505: dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
2506: dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
2507: dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
2508: dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
2509: dump_cfg_fmtint(oProtocol, o->protocol);
2510: dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
2511: dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
2512: dump_cfg_fmtint(oRequestTTY, o->request_tty);
2513: dump_cfg_fmtint(oRhostsRSAAuthentication, o->rhosts_rsa_authentication);
2514: dump_cfg_fmtint(oRSAAuthentication, o->rsa_authentication);
2515: dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
2516: dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
2517: dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
2518: dump_cfg_fmtint(oTunnel, o->tun_open);
2519: dump_cfg_fmtint(oUsePrivilegedPort, o->use_privileged_port);
2520: dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
2521: dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
1.229 djm 2522: dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
1.221 djm 2523:
2524: /* Integer options */
2525: dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
2526: dump_cfg_int(oCompressionLevel, o->compression_level);
2527: dump_cfg_int(oConnectionAttempts, o->connection_attempts);
2528: dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
2529: dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
2530: dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
2531: dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
2532:
2533: /* String options */
2534: dump_cfg_string(oBindAddress, o->bind_address);
2535: dump_cfg_string(oCiphers, o->ciphers ? o->ciphers : KEX_CLIENT_ENCRYPT);
2536: dump_cfg_string(oControlPath, o->control_path);
1.240 djm 2537: dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
1.221 djm 2538: dump_cfg_string(oHostKeyAlias, o->host_key_alias);
1.230 djm 2539: dump_cfg_string(oHostbasedKeyTypes, o->hostbased_key_types);
1.253 markus 2540: dump_cfg_string(oIdentityAgent, o->identity_agent);
1.221 djm 2541: dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
2542: dump_cfg_string(oKexAlgorithms, o->kex_algorithms ? o->kex_algorithms : KEX_CLIENT_KEX);
2543: dump_cfg_string(oLocalCommand, o->local_command);
2544: dump_cfg_string(oLogLevel, log_level_name(o->log_level));
2545: dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC);
2546: dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
2547: dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
1.242 djm 2548: dump_cfg_string(oPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.230 djm 2549: dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
1.221 djm 2550: dump_cfg_string(oXAuthLocation, o->xauth_location);
2551:
1.230 djm 2552: /* Forwards */
1.221 djm 2553: dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
2554: dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
2555: dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
2556:
2557: /* String array options */
2558: dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
2559: dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
2560: dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
2561: dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
2562: dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
2563:
2564: /* Special cases */
2565:
2566: /* oConnectTimeout */
2567: if (o->connection_timeout == -1)
2568: printf("connecttimeout none\n");
2569: else
2570: dump_cfg_int(oConnectTimeout, o->connection_timeout);
2571:
2572: /* oTunnelDevice */
2573: printf("tunneldevice");
2574: if (o->tun_local == SSH_TUNID_ANY)
2575: printf(" any");
2576: else
2577: printf(" %d", o->tun_local);
2578: if (o->tun_remote == SSH_TUNID_ANY)
2579: printf(":any");
2580: else
2581: printf(":%d", o->tun_remote);
2582: printf("\n");
2583:
2584: /* oCanonicalizePermittedCNAMEs */
2585: if ( o->num_permitted_cnames > 0) {
2586: printf("canonicalizePermittedcnames");
2587: for (i = 0; i < o->num_permitted_cnames; i++) {
2588: printf(" %s:%s", o->permitted_cnames[i].source_list,
2589: o->permitted_cnames[i].target_list);
2590: }
2591: printf("\n");
2592: }
2593:
2594: /* oCipher */
2595: if (o->cipher != SSH_CIPHER_NOT_SET)
2596: printf("Cipher %s\n", cipher_name(o->cipher));
2597:
2598: /* oControlPersist */
2599: if (o->control_persist == 0 || o->control_persist_timeout == 0)
2600: dump_cfg_fmtint(oControlPersist, o->control_persist);
2601: else
2602: dump_cfg_int(oControlPersist, o->control_persist_timeout);
2603:
2604: /* oEscapeChar */
2605: if (o->escape_char == SSH_ESCAPECHAR_NONE)
2606: printf("escapechar none\n");
2607: else {
1.257 djm 2608: vis(buf, o->escape_char, VIS_WHITE, 0);
2609: printf("escapechar %s\n", buf);
1.221 djm 2610: }
2611:
2612: /* oIPQoS */
2613: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2614: printf("%s\n", iptos2str(o->ip_qos_bulk));
2615:
2616: /* oRekeyLimit */
1.249 dtucker 2617: printf("rekeylimit %llu %d\n",
2618: (unsigned long long)o->rekey_limit, o->rekey_interval);
1.221 djm 2619:
2620: /* oStreamLocalBindMask */
2621: printf("streamlocalbindmask 0%o\n",
2622: o->fwd_opts.streamlocal_bind_mask);
1.257 djm 2623:
2624: /* oProxyCommand / oProxyJump */
2625: if (o->jump_host == NULL)
2626: dump_cfg_string(oProxyCommand, o->proxy_command);
2627: else {
2628: /* Check for numeric addresses */
2629: i = strchr(o->jump_host, ':') != NULL ||
2630: strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
2631: snprintf(buf, sizeof(buf), "%d", o->jump_port);
2632: printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
1.259 djm 2633: /* optional additional jump spec */
2634: o->jump_extra == NULL ? "" : o->jump_extra,
2635: o->jump_extra == NULL ? "" : ",",
1.257 djm 2636: /* optional user */
2637: o->jump_user == NULL ? "" : o->jump_user,
2638: o->jump_user == NULL ? "" : "@",
2639: /* opening [ if hostname is numeric */
2640: i ? "[" : "",
2641: /* mandatory hostname */
2642: o->jump_host,
2643: /* closing ] if hostname is numeric */
2644: i ? "]" : "",
2645: /* optional port number */
2646: o->jump_port <= 0 ? "" : ":",
1.259 djm 2647: o->jump_port <= 0 ? "" : buf);
1.257 djm 2648: }
1.1 deraadt 2649: }
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