Annotation of src/usr.bin/ssh/readconf.c, Revision 1.257
1.257 ! djm 1: /* $OpenBSD: readconf.c,v 1.256 2016/06/03 04:09:38 dtucker 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:
1.220 millert 300: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0 &&
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;
1.17 markus 846: /* NOTREACHED */
1.199 djm 847: case oIgnoredUnknownOption:
848: debug("%s line %d: Ignored unknown option \"%s\"",
849: filename, linenum, keyword);
850: return 0;
1.111 djm 851: case oConnectTimeout:
852: intptr = &options->connection_timeout;
1.127 markus 853: parse_time:
1.111 djm 854: arg = strdelim(&s);
855: if (!arg || *arg == '\0')
856: fatal("%s line %d: missing time value.",
857: filename, linenum);
1.221 djm 858: if (strcmp(arg, "none") == 0)
859: value = -1;
860: else if ((value = convtime(arg)) == -1)
1.111 djm 861: fatal("%s line %d: invalid time value.",
862: filename, linenum);
1.160 dtucker 863: if (*activep && *intptr == -1)
1.111 djm 864: *intptr = value;
865: break;
866:
1.17 markus 867: case oForwardAgent:
868: intptr = &options->forward_agent;
1.207 djm 869: parse_flag:
870: multistate_ptr = multistate_flag;
871: parse_multistate:
1.42 provos 872: arg = strdelim(&s);
1.40 ho 873: if (!arg || *arg == '\0')
1.207 djm 874: fatal("%s line %d: missing argument.",
875: filename, linenum);
876: value = -1;
877: for (i = 0; multistate_ptr[i].key != NULL; i++) {
878: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
879: value = multistate_ptr[i].value;
880: break;
881: }
882: }
883: if (value == -1)
884: fatal("%s line %d: unsupported option \"%s\".",
885: filename, linenum, arg);
1.17 markus 886: if (*activep && *intptr == -1)
887: *intptr = value;
888: break;
889:
890: case oForwardX11:
891: intptr = &options->forward_x11;
892: goto parse_flag;
893:
1.123 markus 894: case oForwardX11Trusted:
895: intptr = &options->forward_x11_trusted;
896: goto parse_flag;
1.221 djm 897:
1.186 djm 898: case oForwardX11Timeout:
899: intptr = &options->forward_x11_timeout;
900: goto parse_time;
1.123 markus 901:
1.17 markus 902: case oGatewayPorts:
1.220 millert 903: intptr = &options->fwd_opts.gateway_ports;
1.17 markus 904: goto parse_flag;
905:
1.153 markus 906: case oExitOnForwardFailure:
907: intptr = &options->exit_on_forward_failure;
908: goto parse_flag;
909:
1.17 markus 910: case oUsePrivilegedPort:
911: intptr = &options->use_privileged_port;
912: goto parse_flag;
913:
914: case oPasswordAuthentication:
915: intptr = &options->password_authentication;
916: goto parse_flag;
917:
1.48 markus 918: case oKbdInteractiveAuthentication:
919: intptr = &options->kbd_interactive_authentication;
920: goto parse_flag;
921:
922: case oKbdInteractiveDevices:
923: charptr = &options->kbd_interactive_devices;
924: goto parse_string;
925:
1.50 markus 926: case oPubkeyAuthentication:
927: intptr = &options->pubkey_authentication;
1.30 markus 928: goto parse_flag;
929:
1.17 markus 930: case oRSAAuthentication:
931: intptr = &options->rsa_authentication;
932: goto parse_flag;
933:
934: case oRhostsRSAAuthentication:
935: intptr = &options->rhosts_rsa_authentication;
936: goto parse_flag;
937:
1.72 markus 938: case oHostbasedAuthentication:
939: intptr = &options->hostbased_authentication;
940: goto parse_flag;
941:
1.59 markus 942: case oChallengeResponseAuthentication:
1.78 markus 943: intptr = &options->challenge_response_authentication;
1.17 markus 944: goto parse_flag;
1.108 jakob 945:
1.118 markus 946: case oGssAuthentication:
947: intptr = &options->gss_authentication;
948: goto parse_flag;
949:
950: case oGssDelegateCreds:
951: intptr = &options->gss_deleg_creds;
952: goto parse_flag;
953:
1.17 markus 954: case oBatchMode:
955: intptr = &options->batch_mode;
956: goto parse_flag;
957:
958: case oCheckHostIP:
959: intptr = &options->check_host_ip;
1.167 grunk 960: goto parse_flag;
1.17 markus 961:
1.107 jakob 962: case oVerifyHostKeyDNS:
963: intptr = &options->verify_host_key_dns;
1.207 djm 964: multistate_ptr = multistate_yesnoask;
965: goto parse_multistate;
1.107 jakob 966:
1.17 markus 967: case oStrictHostKeyChecking:
968: intptr = &options->strict_host_key_checking;
1.207 djm 969: multistate_ptr = multistate_yesnoask;
970: goto parse_multistate;
1.17 markus 971:
972: case oCompression:
973: intptr = &options->compression;
974: goto parse_flag;
975:
1.126 markus 976: case oTCPKeepAlive:
977: intptr = &options->tcp_keep_alive;
1.17 markus 978: goto parse_flag;
979:
1.91 markus 980: case oNoHostAuthenticationForLocalhost:
981: intptr = &options->no_host_authentication_for_localhost;
982: goto parse_flag;
983:
1.17 markus 984: case oNumberOfPasswordPrompts:
985: intptr = &options->number_of_password_prompts;
986: goto parse_int;
987:
988: case oCompressionLevel:
989: intptr = &options->compression_level;
990: goto parse_int;
991:
1.105 markus 992: case oRekeyLimit:
993: arg = strdelim(&s);
994: if (!arg || *arg == '\0')
1.198 dtucker 995: fatal("%.200s line %d: Missing argument.", filename,
996: linenum);
997: if (strcmp(arg, "default") == 0) {
998: val64 = 0;
999: } else {
1.200 dtucker 1000: if (scan_scaled(arg, &val64) == -1)
1001: fatal("%.200s line %d: Bad number '%s': %s",
1002: filename, linenum, arg, strerror(errno));
1.198 dtucker 1003: if (val64 != 0 && val64 < 16)
1004: fatal("%.200s line %d: RekeyLimit too small",
1005: filename, linenum);
1.105 markus 1006: }
1.165 djm 1007: if (*activep && options->rekey_limit == -1)
1.249 dtucker 1008: options->rekey_limit = val64;
1.198 dtucker 1009: if (s != NULL) { /* optional rekey interval present */
1010: if (strcmp(s, "none") == 0) {
1011: (void)strdelim(&s); /* discard */
1012: break;
1013: }
1014: intptr = &options->rekey_interval;
1015: goto parse_time;
1016: }
1.105 markus 1017: break;
1018:
1.17 markus 1019: case oIdentityFile:
1.42 provos 1020: arg = strdelim(&s);
1.40 ho 1021: if (!arg || *arg == '\0')
1.17 markus 1022: fatal("%.200s line %d: Missing argument.", filename, linenum);
1023: if (*activep) {
1.50 markus 1024: intptr = &options->num_identity_files;
1.27 markus 1025: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 1026: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 1027: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.221 djm 1028: add_identity_file(options, NULL,
1029: arg, flags & SSHCONF_USERCONF);
1.17 markus 1030: }
1031: break;
1032:
1.241 djm 1033: case oCertificateFile:
1034: arg = strdelim(&s);
1035: if (!arg || *arg == '\0')
1036: fatal("%.200s line %d: Missing argument.",
1037: filename, linenum);
1038: if (*activep) {
1039: intptr = &options->num_certificate_files;
1040: if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
1041: fatal("%.200s line %d: Too many certificate "
1042: "files specified (max %d).",
1043: filename, linenum,
1044: SSH_MAX_CERTIFICATE_FILES);
1045: }
1046: add_certificate_file(options, arg,
1047: flags & SSHCONF_USERCONF);
1048: }
1049: break;
1050:
1.34 markus 1051: case oXAuthLocation:
1052: charptr=&options->xauth_location;
1053: goto parse_string;
1054:
1.17 markus 1055: case oUser:
1056: charptr = &options->user;
1057: parse_string:
1.42 provos 1058: arg = strdelim(&s);
1.40 ho 1059: if (!arg || *arg == '\0')
1.193 djm 1060: fatal("%.200s line %d: Missing argument.",
1061: filename, linenum);
1.17 markus 1062: if (*activep && *charptr == NULL)
1.38 provos 1063: *charptr = xstrdup(arg);
1.17 markus 1064: break;
1065:
1066: case oGlobalKnownHostsFile:
1.193 djm 1067: cpptr = (char **)&options->system_hostfiles;
1068: uintptr = &options->num_system_hostfiles;
1069: max_entries = SSH_MAX_HOSTS_FILES;
1070: parse_char_array:
1071: if (*activep && *uintptr == 0) {
1072: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1073: if ((*uintptr) >= max_entries)
1074: fatal("%s line %d: "
1075: "too many authorized keys files.",
1076: filename, linenum);
1077: cpptr[(*uintptr)++] = xstrdup(arg);
1078: }
1079: }
1080: return 0;
1.17 markus 1081:
1082: case oUserKnownHostsFile:
1.193 djm 1083: cpptr = (char **)&options->user_hostfiles;
1084: uintptr = &options->num_user_hostfiles;
1085: max_entries = SSH_MAX_HOSTS_FILES;
1086: goto parse_char_array;
1.27 markus 1087:
1.17 markus 1088: case oHostName:
1089: charptr = &options->hostname;
1090: goto parse_string;
1091:
1.52 markus 1092: case oHostKeyAlias:
1093: charptr = &options->host_key_alias;
1094: goto parse_string;
1095:
1.67 markus 1096: case oPreferredAuthentications:
1097: charptr = &options->preferred_authentications;
1098: goto parse_string;
1099:
1.77 markus 1100: case oBindAddress:
1101: charptr = &options->bind_address;
1102: goto parse_string;
1103:
1.183 markus 1104: case oPKCS11Provider:
1105: charptr = &options->pkcs11_provider;
1.86 markus 1106: goto parse_string;
1.85 jakob 1107:
1.17 markus 1108: case oProxyCommand:
1.144 reyk 1109: charptr = &options->proxy_command;
1.257 ! djm 1110: /* Ignore ProxyCommand if ProxyJump already specified */
! 1111: if (options->jump_host != NULL)
! 1112: charptr = &options->jump_host; /* Skip below */
1.144 reyk 1113: parse_command:
1.113 markus 1114: if (s == NULL)
1115: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 1116: len = strspn(s, WHITESPACE "=");
1.17 markus 1117: if (*activep && *charptr == NULL)
1.102 markus 1118: *charptr = xstrdup(s + len);
1.17 markus 1119: return 0;
1120:
1.257 ! djm 1121: case oProxyJump:
! 1122: if (s == NULL) {
! 1123: fatal("%.200s line %d: Missing argument.",
! 1124: filename, linenum);
! 1125: }
! 1126: len = strspn(s, WHITESPACE "=");
! 1127: if (parse_jump(s + len, options, *activep) == -1) {
! 1128: fatal("%.200s line %d: Invalid ProxyJump \"%s\"",
! 1129: filename, linenum, s + len);
! 1130: }
! 1131: return 0;
! 1132:
1.17 markus 1133: case oPort:
1134: intptr = &options->port;
1135: parse_int:
1.42 provos 1136: arg = strdelim(&s);
1.40 ho 1137: if (!arg || *arg == '\0')
1.17 markus 1138: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1139: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 1140: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 1141:
1142: /* Octal, decimal, or hex format? */
1.38 provos 1143: value = strtol(arg, &endofnumber, 0);
1144: if (arg == endofnumber)
1.21 markus 1145: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 1146: if (*activep && *intptr == -1)
1147: *intptr = value;
1148: break;
1149:
1150: case oConnectionAttempts:
1151: intptr = &options->connection_attempts;
1152: goto parse_int;
1153:
1154: case oCipher:
1155: intptr = &options->cipher;
1.42 provos 1156: arg = strdelim(&s);
1.40 ho 1157: if (!arg || *arg == '\0')
1.32 markus 1158: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1159: value = cipher_number(arg);
1.17 markus 1160: if (value == -1)
1161: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 1162: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 1163: if (*activep && *intptr == -1)
1164: *intptr = value;
1165: break;
1166:
1.25 markus 1167: case oCiphers:
1.42 provos 1168: arg = strdelim(&s);
1.40 ho 1169: if (!arg || *arg == '\0')
1.32 markus 1170: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.239 djm 1171: if (!ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.31 markus 1172: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1173: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1174: if (*activep && options->ciphers == NULL)
1.38 provos 1175: options->ciphers = xstrdup(arg);
1.25 markus 1176: break;
1177:
1.62 markus 1178: case oMacs:
1179: arg = strdelim(&s);
1180: if (!arg || *arg == '\0')
1181: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.239 djm 1182: if (!mac_valid(*arg == '+' ? arg + 1 : arg))
1.62 markus 1183: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1184: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1185: if (*activep && options->macs == NULL)
1186: options->macs = xstrdup(arg);
1187: break;
1188:
1.189 djm 1189: case oKexAlgorithms:
1190: arg = strdelim(&s);
1191: if (!arg || *arg == '\0')
1192: fatal("%.200s line %d: Missing argument.",
1193: filename, linenum);
1.239 djm 1194: if (!kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.189 djm 1195: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1196: filename, linenum, arg ? arg : "<NONE>");
1197: if (*activep && options->kex_algorithms == NULL)
1198: options->kex_algorithms = xstrdup(arg);
1199: break;
1200:
1.76 markus 1201: case oHostKeyAlgorithms:
1.238 markus 1202: charptr = &options->hostkeyalgorithms;
1203: parse_keytypes:
1.76 markus 1204: arg = strdelim(&s);
1205: if (!arg || *arg == '\0')
1.238 markus 1206: fatal("%.200s line %d: Missing argument.",
1207: filename, linenum);
1.239 djm 1208: if (!sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.238 markus 1209: fatal("%s line %d: Bad key types '%s'.",
1210: filename, linenum, arg ? arg : "<NONE>");
1211: if (*activep && *charptr == NULL)
1212: *charptr = xstrdup(arg);
1.76 markus 1213: break;
1214:
1.25 markus 1215: case oProtocol:
1216: intptr = &options->protocol;
1.42 provos 1217: arg = strdelim(&s);
1.40 ho 1218: if (!arg || *arg == '\0')
1.32 markus 1219: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1220: value = proto_spec(arg);
1.25 markus 1221: if (value == SSH_PROTO_UNKNOWN)
1222: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 1223: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1224: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
1225: *intptr = value;
1226: break;
1227:
1.17 markus 1228: case oLogLevel:
1.164 dtucker 1229: log_level_ptr = &options->log_level;
1.42 provos 1230: arg = strdelim(&s);
1.38 provos 1231: value = log_level_number(arg);
1.95 markus 1232: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1233: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1234: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1235: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1236: *log_level_ptr = (LogLevel) value;
1.17 markus 1237: break;
1238:
1.88 stevesk 1239: case oLocalForward:
1.17 markus 1240: case oRemoteForward:
1.168 stevesk 1241: case oDynamicForward:
1.42 provos 1242: arg = strdelim(&s);
1.135 djm 1243: if (arg == NULL || *arg == '\0')
1.88 stevesk 1244: fatal("%.200s line %d: Missing port argument.",
1245: filename, linenum);
1.135 djm 1246:
1.168 stevesk 1247: if (opcode == oLocalForward ||
1248: opcode == oRemoteForward) {
1249: arg2 = strdelim(&s);
1250: if (arg2 == NULL || *arg2 == '\0')
1251: fatal("%.200s line %d: Missing target argument.",
1252: filename, linenum);
1.135 djm 1253:
1.168 stevesk 1254: /* construct a string for parse_forward */
1255: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1256: } else if (opcode == oDynamicForward) {
1257: strlcpy(fwdarg, arg, sizeof(fwdarg));
1258: }
1259:
1260: if (parse_forward(&fwd, fwdarg,
1.176 djm 1261: opcode == oDynamicForward ? 1 : 0,
1262: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1263: fatal("%.200s line %d: Bad forwarding specification.",
1264: filename, linenum);
1.135 djm 1265:
1.88 stevesk 1266: if (*activep) {
1.168 stevesk 1267: if (opcode == oLocalForward ||
1268: opcode == oDynamicForward)
1.135 djm 1269: add_local_forward(options, &fwd);
1.88 stevesk 1270: else if (opcode == oRemoteForward)
1.135 djm 1271: add_remote_forward(options, &fwd);
1.88 stevesk 1272: }
1.17 markus 1273: break;
1.71 markus 1274:
1.90 stevesk 1275: case oClearAllForwardings:
1276: intptr = &options->clear_forwardings;
1277: goto parse_flag;
1278:
1.17 markus 1279: case oHost:
1.206 djm 1280: if (cmdline)
1281: fatal("Host directive not supported as a command-line "
1282: "option");
1.17 markus 1283: *activep = 0;
1.191 djm 1284: arg2 = NULL;
1285: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.252 djm 1286: if ((flags & SSHCONF_NEVERMATCH) != 0)
1287: break;
1.191 djm 1288: negated = *arg == '!';
1289: if (negated)
1290: arg++;
1.38 provos 1291: if (match_pattern(host, arg)) {
1.191 djm 1292: if (negated) {
1293: debug("%.200s line %d: Skipping Host "
1294: "block because of negated match "
1295: "for %.100s", filename, linenum,
1296: arg);
1297: *activep = 0;
1298: break;
1299: }
1300: if (!*activep)
1301: arg2 = arg; /* logged below */
1.17 markus 1302: *activep = 1;
1303: }
1.191 djm 1304: }
1305: if (*activep)
1306: debug("%.200s line %d: Applying options for %.100s",
1307: filename, linenum, arg2);
1.42 provos 1308: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1309: return 0;
1310:
1.206 djm 1311: case oMatch:
1312: if (cmdline)
1313: fatal("Host directive not supported as a command-line "
1314: "option");
1.221 djm 1315: value = match_cfg_line(options, &s, pw, host, original_host,
1316: flags & SSHCONF_POSTCANON, filename, linenum);
1.206 djm 1317: if (value < 0)
1318: fatal("%.200s line %d: Bad Match condition", filename,
1319: linenum);
1.252 djm 1320: *activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
1.206 djm 1321: break;
1322:
1.17 markus 1323: case oEscapeChar:
1324: intptr = &options->escape_char;
1.42 provos 1325: arg = strdelim(&s);
1.40 ho 1326: if (!arg || *arg == '\0')
1.17 markus 1327: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.236 djm 1328: if (strcmp(arg, "none") == 0)
1329: value = SSH_ESCAPECHAR_NONE;
1330: else if (arg[1] == '\0')
1331: value = (u_char) arg[0];
1332: else if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1333: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1334: value = (u_char) arg[1] & 31;
1.17 markus 1335: else {
1336: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1337: filename, linenum);
1.17 markus 1338: /* NOTREACHED */
1339: value = 0; /* Avoid compiler warning. */
1340: }
1341: if (*activep && *intptr == -1)
1342: *intptr = value;
1.112 djm 1343: break;
1344:
1345: case oAddressFamily:
1.114 djm 1346: intptr = &options->address_family;
1.207 djm 1347: multistate_ptr = multistate_addressfamily;
1348: goto parse_multistate;
1.17 markus 1349:
1.101 markus 1350: case oEnableSSHKeysign:
1351: intptr = &options->enable_ssh_keysign;
1352: goto parse_flag;
1353:
1.128 markus 1354: case oIdentitiesOnly:
1355: intptr = &options->identities_only;
1356: goto parse_flag;
1357:
1.127 markus 1358: case oServerAliveInterval:
1359: intptr = &options->server_alive_interval;
1360: goto parse_time;
1361:
1362: case oServerAliveCountMax:
1363: intptr = &options->server_alive_count_max;
1364: goto parse_int;
1365:
1.130 djm 1366: case oSendEnv:
1367: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1368: if (strchr(arg, '=') != NULL)
1369: fatal("%s line %d: Invalid environment name.",
1370: filename, linenum);
1.137 djm 1371: if (!*activep)
1372: continue;
1.130 djm 1373: if (options->num_send_env >= MAX_SEND_ENV)
1374: fatal("%s line %d: too many send env.",
1375: filename, linenum);
1376: options->send_env[options->num_send_env++] =
1377: xstrdup(arg);
1378: }
1379: break;
1380:
1.132 djm 1381: case oControlPath:
1382: charptr = &options->control_path;
1383: goto parse_string;
1384:
1385: case oControlMaster:
1386: intptr = &options->control_master;
1.207 djm 1387: multistate_ptr = multistate_controlmaster;
1388: goto parse_multistate;
1.132 djm 1389:
1.187 djm 1390: case oControlPersist:
1391: /* no/false/yes/true, or a time spec */
1392: intptr = &options->control_persist;
1393: arg = strdelim(&s);
1394: if (!arg || *arg == '\0')
1395: fatal("%.200s line %d: Missing ControlPersist"
1396: " argument.", filename, linenum);
1397: value = 0;
1398: value2 = 0; /* timeout */
1399: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1400: value = 0;
1401: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1402: value = 1;
1403: else if ((value2 = convtime(arg)) >= 0)
1404: value = 1;
1405: else
1406: fatal("%.200s line %d: Bad ControlPersist argument.",
1407: filename, linenum);
1408: if (*activep && *intptr == -1) {
1409: *intptr = value;
1410: options->control_persist_timeout = value2;
1411: }
1412: break;
1413:
1.136 djm 1414: case oHashKnownHosts:
1415: intptr = &options->hash_known_hosts;
1416: goto parse_flag;
1417:
1.144 reyk 1418: case oTunnel:
1419: intptr = &options->tun_open;
1.207 djm 1420: multistate_ptr = multistate_tunnel;
1421: goto parse_multistate;
1.144 reyk 1422:
1423: case oTunnelDevice:
1424: arg = strdelim(&s);
1425: if (!arg || *arg == '\0')
1426: fatal("%.200s line %d: Missing argument.", filename, linenum);
1427: value = a2tun(arg, &value2);
1.145 reyk 1428: if (value == SSH_TUNID_ERR)
1.144 reyk 1429: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1430: if (*activep) {
1431: options->tun_local = value;
1432: options->tun_remote = value2;
1433: }
1434: break;
1435:
1436: case oLocalCommand:
1437: charptr = &options->local_command;
1438: goto parse_command;
1439:
1440: case oPermitLocalCommand:
1441: intptr = &options->permit_local_command;
1442: goto parse_flag;
1443:
1.167 grunk 1444: case oVisualHostKey:
1445: intptr = &options->visual_host_key;
1446: goto parse_flag;
1447:
1.252 djm 1448: case oInclude:
1449: if (cmdline)
1450: fatal("Include directive not supported as a "
1451: "command-line option");
1452: value = 0;
1453: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1454: /*
1455: * Ensure all paths are anchored. User configuration
1456: * files may begin with '~/' but system configurations
1457: * must not. If the path is relative, then treat it
1458: * as living in ~/.ssh for user configurations or
1459: * /etc/ssh for system ones.
1460: */
1461: if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0)
1462: fatal("%.200s line %d: bad include path %s.",
1463: filename, linenum, arg);
1464: if (*arg != '/' && *arg != '~') {
1465: xasprintf(&arg2, "%s/%s",
1466: (flags & SSHCONF_USERCONF) ?
1467: "~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
1468: } else
1469: arg2 = xstrdup(arg);
1470: memset(&gl, 0, sizeof(gl));
1471: r = glob(arg2, GLOB_TILDE, NULL, &gl);
1472: if (r == GLOB_NOMATCH) {
1473: debug("%.200s line %d: include %s matched no "
1474: "files",filename, linenum, arg2);
1475: continue;
1476: } else if (r != 0 || gl.gl_pathc < 0)
1477: fatal("%.200s line %d: glob failed for %s.",
1478: filename, linenum, arg2);
1479: free(arg2);
1480: oactive = *activep;
1481: for (i = 0; i < (u_int)gl.gl_pathc; i++) {
1482: debug3("%.200s line %d: Including file %s "
1483: "depth %d%s", filename, linenum,
1484: gl.gl_pathv[i], depth,
1485: oactive ? "" : " (parse only)");
1486: r = read_config_file_depth(gl.gl_pathv[i],
1487: pw, host, original_host, options,
1488: flags | SSHCONF_CHECKPERM |
1489: (oactive ? 0 : SSHCONF_NEVERMATCH),
1490: activep, depth + 1);
1491: /*
1492: * don't let Match in includes clobber the
1493: * containing file's Match state.
1494: */
1495: *activep = oactive;
1496: if (r != 1)
1497: value = -1;
1498: }
1499: globfree(&gl);
1500: }
1501: if (value != 0)
1502: return value;
1503: break;
1504:
1.190 djm 1505: case oIPQoS:
1506: arg = strdelim(&s);
1507: if ((value = parse_ipqos(arg)) == -1)
1508: fatal("%s line %d: Bad IPQoS value: %s",
1509: filename, linenum, arg);
1510: arg = strdelim(&s);
1511: if (arg == NULL)
1512: value2 = value;
1513: else if ((value2 = parse_ipqos(arg)) == -1)
1514: fatal("%s line %d: Bad IPQoS value: %s",
1515: filename, linenum, arg);
1516: if (*activep) {
1517: options->ip_qos_interactive = value;
1518: options->ip_qos_bulk = value2;
1519: }
1520: break;
1521:
1.192 djm 1522: case oRequestTTY:
1523: intptr = &options->request_tty;
1.207 djm 1524: multistate_ptr = multistate_requesttty;
1525: goto parse_multistate;
1.192 djm 1526:
1.199 djm 1527: case oIgnoreUnknown:
1528: charptr = &options->ignored_unknown;
1529: goto parse_string;
1530:
1.205 djm 1531: case oProxyUseFdpass:
1532: intptr = &options->proxy_use_fdpass;
1533: goto parse_flag;
1534:
1.208 djm 1535: case oCanonicalDomains:
1536: value = options->num_canonical_domains != 0;
1537: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1538: valid_domain(arg, filename, linenum);
1539: if (!*activep || value)
1540: continue;
1541: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1542: fatal("%s line %d: too many hostname suffixes.",
1543: filename, linenum);
1544: options->canonical_domains[
1545: options->num_canonical_domains++] = xstrdup(arg);
1546: }
1547: break;
1548:
1.209 djm 1549: case oCanonicalizePermittedCNAMEs:
1.208 djm 1550: value = options->num_permitted_cnames != 0;
1551: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1552: /* Either '*' for everything or 'list:list' */
1553: if (strcmp(arg, "*") == 0)
1554: arg2 = arg;
1555: else {
1556: lowercase(arg);
1557: if ((arg2 = strchr(arg, ':')) == NULL ||
1558: arg2[1] == '\0') {
1559: fatal("%s line %d: "
1560: "Invalid permitted CNAME \"%s\"",
1561: filename, linenum, arg);
1562: }
1563: *arg2 = '\0';
1564: arg2++;
1565: }
1566: if (!*activep || value)
1567: continue;
1568: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1569: fatal("%s line %d: too many permitted CNAMEs.",
1570: filename, linenum);
1571: cname = options->permitted_cnames +
1572: options->num_permitted_cnames++;
1573: cname->source_list = xstrdup(arg);
1574: cname->target_list = xstrdup(arg2);
1575: }
1576: break;
1577:
1.209 djm 1578: case oCanonicalizeHostname:
1579: intptr = &options->canonicalize_hostname;
1580: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1581: goto parse_multistate;
1582:
1.209 djm 1583: case oCanonicalizeMaxDots:
1584: intptr = &options->canonicalize_max_dots;
1.208 djm 1585: goto parse_int;
1586:
1.209 djm 1587: case oCanonicalizeFallbackLocal:
1588: intptr = &options->canonicalize_fallback_local;
1.208 djm 1589: goto parse_flag;
1590:
1.220 millert 1591: case oStreamLocalBindMask:
1592: arg = strdelim(&s);
1593: if (!arg || *arg == '\0')
1594: fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum);
1595: /* Parse mode in octal format */
1596: value = strtol(arg, &endofnumber, 8);
1597: if (arg == endofnumber || value < 0 || value > 0777)
1598: fatal("%.200s line %d: Bad mask.", filename, linenum);
1599: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1600: break;
1601:
1602: case oStreamLocalBindUnlink:
1603: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1604: goto parse_flag;
1605:
1.223 djm 1606: case oRevokedHostKeys:
1607: charptr = &options->revoked_host_keys;
1608: goto parse_string;
1609:
1.224 djm 1610: case oFingerprintHash:
1.225 djm 1611: intptr = &options->fingerprint_hash;
1.224 djm 1612: arg = strdelim(&s);
1613: if (!arg || *arg == '\0')
1614: fatal("%.200s line %d: Missing argument.",
1615: filename, linenum);
1616: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1617: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1618: filename, linenum, arg);
1.225 djm 1619: if (*activep && *intptr == -1)
1620: *intptr = value;
1.224 djm 1621: break;
1622:
1.229 djm 1623: case oUpdateHostkeys:
1624: intptr = &options->update_hostkeys;
1.232 djm 1625: multistate_ptr = multistate_yesnoask;
1626: goto parse_multistate;
1.229 djm 1627:
1.230 djm 1628: case oHostbasedKeyTypes:
1629: charptr = &options->hostbased_key_types;
1.238 markus 1630: goto parse_keytypes;
1631:
1632: case oPubkeyAcceptedKeyTypes:
1633: charptr = &options->pubkey_key_types;
1634: goto parse_keytypes;
1.230 djm 1635:
1.246 jcs 1636: case oAddKeysToAgent:
1637: intptr = &options->add_keys_to_agent;
1638: multistate_ptr = multistate_yesnoaskconfirm;
1639: goto parse_multistate;
1640:
1.253 markus 1641: case oIdentityAgent:
1642: charptr = &options->identity_agent;
1643: goto parse_string;
1644:
1.96 markus 1645: case oDeprecated:
1.98 markus 1646: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1647: filename, linenum, keyword);
1.98 markus 1648: return 0;
1.96 markus 1649:
1.110 jakob 1650: case oUnsupported:
1651: error("%s line %d: Unsupported option \"%s\"",
1652: filename, linenum, keyword);
1653: return 0;
1654:
1.17 markus 1655: default:
1.221 djm 1656: fatal("%s: Unimplemented opcode %d", __func__, opcode);
1.17 markus 1657: }
1658:
1659: /* Check that there is no garbage at end of line. */
1.57 djm 1660: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1661: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1662: filename, linenum, arg);
1.39 ho 1663: }
1.17 markus 1664: return 0;
1.1 deraadt 1665: }
1666:
1.19 markus 1667: /*
1668: * Reads the config file and modifies the options accordingly. Options
1669: * should already be initialized before this call. This never returns if
1.89 stevesk 1670: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1671: */
1.89 stevesk 1672: int
1.206 djm 1673: read_config_file(const char *filename, struct passwd *pw, const char *host,
1.221 djm 1674: const char *original_host, Options *options, int flags)
1.1 deraadt 1675: {
1.252 djm 1676: int active = 1;
1677:
1678: return read_config_file_depth(filename, pw, host, original_host,
1679: options, flags, &active, 0);
1680: }
1681:
1682: #define READCONF_MAX_DEPTH 16
1683: static int
1684: read_config_file_depth(const char *filename, struct passwd *pw,
1685: const char *host, const char *original_host, Options *options,
1686: int flags, int *activep, int depth)
1687: {
1.17 markus 1688: FILE *f;
1689: char line[1024];
1.252 djm 1690: int linenum;
1.17 markus 1691: int bad_options = 0;
1692:
1.252 djm 1693: if (depth < 0 || depth > READCONF_MAX_DEPTH)
1694: fatal("Too many recursive configuration includes");
1695:
1.129 djm 1696: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1697: return 0;
1.129 djm 1698:
1.196 dtucker 1699: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1700: struct stat sb;
1.134 deraadt 1701:
1.131 dtucker 1702: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1703: fatal("fstat %s: %s", filename, strerror(errno));
1704: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1705: (sb.st_mode & 022) != 0))
1.129 djm 1706: fatal("Bad owner or permissions on %s", filename);
1707: }
1.17 markus 1708:
1709: debug("Reading configuration data %.200s", filename);
1710:
1.19 markus 1711: /*
1712: * Mark that we are now processing the options. This flag is turned
1713: * on/off by Host specifications.
1714: */
1.17 markus 1715: linenum = 0;
1716: while (fgets(line, sizeof(line), f)) {
1717: /* Update line number counter. */
1718: linenum++;
1.252 djm 1719: if (process_config_line_depth(options, pw, host, original_host,
1720: line, filename, linenum, activep, flags, depth) != 0)
1.17 markus 1721: bad_options++;
1722: }
1723: fclose(f);
1724: if (bad_options > 0)
1.64 millert 1725: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1726: filename, bad_options);
1.89 stevesk 1727: return 1;
1.1 deraadt 1728: }
1729:
1.218 djm 1730: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1731: int
1732: option_clear_or_none(const char *o)
1733: {
1734: return o == NULL || strcasecmp(o, "none") == 0;
1735: }
1736:
1.19 markus 1737: /*
1738: * Initializes options to special values that indicate that they have not yet
1739: * been set. Read_config_file will only set options with this value. Options
1740: * are processed in the following order: command line, user config file,
1741: * system config file. Last, fill_default_options is called.
1742: */
1.1 deraadt 1743:
1.26 markus 1744: void
1.17 markus 1745: initialize_options(Options * options)
1.1 deraadt 1746: {
1.17 markus 1747: memset(options, 'X', sizeof(*options));
1748: options->forward_agent = -1;
1749: options->forward_x11 = -1;
1.123 markus 1750: options->forward_x11_trusted = -1;
1.186 djm 1751: options->forward_x11_timeout = -1;
1.255 dtucker 1752: options->stdio_forward_host = NULL;
1753: options->stdio_forward_port = 0;
1.256 dtucker 1754: options->clear_forwardings = -1;
1.153 markus 1755: options->exit_on_forward_failure = -1;
1.34 markus 1756: options->xauth_location = NULL;
1.220 millert 1757: options->fwd_opts.gateway_ports = -1;
1758: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
1759: options->fwd_opts.streamlocal_bind_unlink = -1;
1.17 markus 1760: options->use_privileged_port = -1;
1761: options->rsa_authentication = -1;
1.50 markus 1762: options->pubkey_authentication = -1;
1.78 markus 1763: options->challenge_response_authentication = -1;
1.118 markus 1764: options->gss_authentication = -1;
1765: options->gss_deleg_creds = -1;
1.17 markus 1766: options->password_authentication = -1;
1.48 markus 1767: options->kbd_interactive_authentication = -1;
1768: options->kbd_interactive_devices = NULL;
1.17 markus 1769: options->rhosts_rsa_authentication = -1;
1.72 markus 1770: options->hostbased_authentication = -1;
1.17 markus 1771: options->batch_mode = -1;
1772: options->check_host_ip = -1;
1773: options->strict_host_key_checking = -1;
1774: options->compression = -1;
1.126 markus 1775: options->tcp_keep_alive = -1;
1.17 markus 1776: options->compression_level = -1;
1777: options->port = -1;
1.114 djm 1778: options->address_family = -1;
1.17 markus 1779: options->connection_attempts = -1;
1.111 djm 1780: options->connection_timeout = -1;
1.17 markus 1781: options->number_of_password_prompts = -1;
1782: options->cipher = -1;
1.25 markus 1783: options->ciphers = NULL;
1.62 markus 1784: options->macs = NULL;
1.189 djm 1785: options->kex_algorithms = NULL;
1.76 markus 1786: options->hostkeyalgorithms = NULL;
1.25 markus 1787: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1788: options->num_identity_files = 0;
1.241 djm 1789: options->num_certificate_files = 0;
1.17 markus 1790: options->hostname = NULL;
1.52 markus 1791: options->host_key_alias = NULL;
1.17 markus 1792: options->proxy_command = NULL;
1.257 ! djm 1793: options->jump_user = NULL;
! 1794: options->jump_host = NULL;
! 1795: options->jump_port = -1;
! 1796: options->jump_extra = NULL;
1.17 markus 1797: options->user = NULL;
1798: options->escape_char = -1;
1.193 djm 1799: options->num_system_hostfiles = 0;
1800: options->num_user_hostfiles = 0;
1.185 djm 1801: options->local_forwards = NULL;
1.17 markus 1802: options->num_local_forwards = 0;
1.185 djm 1803: options->remote_forwards = NULL;
1.17 markus 1804: options->num_remote_forwards = 0;
1.95 markus 1805: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1806: options->preferred_authentications = NULL;
1.77 markus 1807: options->bind_address = NULL;
1.183 markus 1808: options->pkcs11_provider = NULL;
1.101 markus 1809: options->enable_ssh_keysign = - 1;
1.91 markus 1810: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1811: options->identities_only = - 1;
1.105 markus 1812: options->rekey_limit = - 1;
1.198 dtucker 1813: options->rekey_interval = -1;
1.107 jakob 1814: options->verify_host_key_dns = -1;
1.127 markus 1815: options->server_alive_interval = -1;
1816: options->server_alive_count_max = -1;
1.130 djm 1817: options->num_send_env = 0;
1.132 djm 1818: options->control_path = NULL;
1819: options->control_master = -1;
1.187 djm 1820: options->control_persist = -1;
1821: options->control_persist_timeout = 0;
1.136 djm 1822: options->hash_known_hosts = -1;
1.144 reyk 1823: options->tun_open = -1;
1824: options->tun_local = -1;
1825: options->tun_remote = -1;
1826: options->local_command = NULL;
1827: options->permit_local_command = -1;
1.246 jcs 1828: options->add_keys_to_agent = -1;
1.253 markus 1829: options->identity_agent = NULL;
1.167 grunk 1830: options->visual_host_key = -1;
1.190 djm 1831: options->ip_qos_interactive = -1;
1832: options->ip_qos_bulk = -1;
1.192 djm 1833: options->request_tty = -1;
1.205 djm 1834: options->proxy_use_fdpass = -1;
1.199 djm 1835: options->ignored_unknown = NULL;
1.208 djm 1836: options->num_canonical_domains = 0;
1837: options->num_permitted_cnames = 0;
1.209 djm 1838: options->canonicalize_max_dots = -1;
1839: options->canonicalize_fallback_local = -1;
1840: options->canonicalize_hostname = -1;
1.223 djm 1841: options->revoked_host_keys = NULL;
1.224 djm 1842: options->fingerprint_hash = -1;
1.229 djm 1843: options->update_hostkeys = -1;
1.230 djm 1844: options->hostbased_key_types = NULL;
1.238 markus 1845: options->pubkey_key_types = NULL;
1.1 deraadt 1846: }
1847:
1.19 markus 1848: /*
1.218 djm 1849: * A petite version of fill_default_options() that just fills the options
1850: * needed for hostname canonicalization to proceed.
1851: */
1852: void
1853: fill_default_options_for_canonicalization(Options *options)
1854: {
1855: if (options->canonicalize_max_dots == -1)
1856: options->canonicalize_max_dots = 1;
1857: if (options->canonicalize_fallback_local == -1)
1858: options->canonicalize_fallback_local = 1;
1859: if (options->canonicalize_hostname == -1)
1860: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1861: }
1862:
1863: /*
1.19 markus 1864: * Called after processing other sources of option data, this fills those
1865: * options for which no value has been specified with their default values.
1866: */
1.26 markus 1867: void
1.17 markus 1868: fill_default_options(Options * options)
1.1 deraadt 1869: {
1.17 markus 1870: if (options->forward_agent == -1)
1.33 markus 1871: options->forward_agent = 0;
1.17 markus 1872: if (options->forward_x11 == -1)
1.23 markus 1873: options->forward_x11 = 0;
1.123 markus 1874: if (options->forward_x11_trusted == -1)
1875: options->forward_x11_trusted = 0;
1.186 djm 1876: if (options->forward_x11_timeout == -1)
1877: options->forward_x11_timeout = 1200;
1.256 dtucker 1878: /*
1879: * stdio forwarding (-W) changes the default for these but we defer
1880: * setting the values so they can be overridden.
1881: */
1.153 markus 1882: if (options->exit_on_forward_failure == -1)
1.256 dtucker 1883: options->exit_on_forward_failure =
1884: options->stdio_forward_host != NULL ? 1 : 0;
1885: if (options->clear_forwardings == -1)
1886: options->clear_forwardings =
1887: options->stdio_forward_host != NULL ? 1 : 0;
1888: if (options->clear_forwardings == 1)
1889: clear_forwardings(options);
1890:
1.34 markus 1891: if (options->xauth_location == NULL)
1.80 markus 1892: options->xauth_location = _PATH_XAUTH;
1.220 millert 1893: if (options->fwd_opts.gateway_ports == -1)
1894: options->fwd_opts.gateway_ports = 0;
1895: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
1896: options->fwd_opts.streamlocal_bind_mask = 0177;
1897: if (options->fwd_opts.streamlocal_bind_unlink == -1)
1898: options->fwd_opts.streamlocal_bind_unlink = 0;
1.17 markus 1899: if (options->use_privileged_port == -1)
1.65 markus 1900: options->use_privileged_port = 0;
1.17 markus 1901: if (options->rsa_authentication == -1)
1902: options->rsa_authentication = 1;
1.50 markus 1903: if (options->pubkey_authentication == -1)
1904: options->pubkey_authentication = 1;
1.78 markus 1905: if (options->challenge_response_authentication == -1)
1.83 markus 1906: options->challenge_response_authentication = 1;
1.118 markus 1907: if (options->gss_authentication == -1)
1.122 markus 1908: options->gss_authentication = 0;
1.118 markus 1909: if (options->gss_deleg_creds == -1)
1910: options->gss_deleg_creds = 0;
1.17 markus 1911: if (options->password_authentication == -1)
1912: options->password_authentication = 1;
1.48 markus 1913: if (options->kbd_interactive_authentication == -1)
1.59 markus 1914: options->kbd_interactive_authentication = 1;
1.17 markus 1915: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1916: options->rhosts_rsa_authentication = 0;
1.72 markus 1917: if (options->hostbased_authentication == -1)
1918: options->hostbased_authentication = 0;
1.17 markus 1919: if (options->batch_mode == -1)
1920: options->batch_mode = 0;
1921: if (options->check_host_ip == -1)
1922: options->check_host_ip = 1;
1923: if (options->strict_host_key_checking == -1)
1924: options->strict_host_key_checking = 2; /* 2 is default */
1925: if (options->compression == -1)
1926: options->compression = 0;
1.126 markus 1927: if (options->tcp_keep_alive == -1)
1928: options->tcp_keep_alive = 1;
1.17 markus 1929: if (options->compression_level == -1)
1930: options->compression_level = 6;
1931: if (options->port == -1)
1932: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1933: if (options->address_family == -1)
1934: options->address_family = AF_UNSPEC;
1.17 markus 1935: if (options->connection_attempts == -1)
1.84 markus 1936: options->connection_attempts = 1;
1.17 markus 1937: if (options->number_of_password_prompts == -1)
1938: options->number_of_password_prompts = 3;
1939: /* Selected in ssh_login(). */
1940: if (options->cipher == -1)
1941: options->cipher = SSH_CIPHER_NOT_SET;
1.76 markus 1942: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1943: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1944: options->protocol = SSH_PROTO_2;
1.246 jcs 1945: if (options->add_keys_to_agent == -1)
1946: options->add_keys_to_agent = 0;
1.17 markus 1947: if (options->num_identity_files == 0) {
1.50 markus 1948: if (options->protocol & SSH_PROTO_1) {
1.195 dtucker 1949: add_identity_file(options, "~/",
1950: _PATH_SSH_CLIENT_IDENTITY, 0);
1.50 markus 1951: }
1952: if (options->protocol & SSH_PROTO_2) {
1.195 dtucker 1953: add_identity_file(options, "~/",
1954: _PATH_SSH_CLIENT_ID_RSA, 0);
1955: add_identity_file(options, "~/",
1956: _PATH_SSH_CLIENT_ID_DSA, 0);
1957: add_identity_file(options, "~/",
1958: _PATH_SSH_CLIENT_ID_ECDSA, 0);
1.215 markus 1959: add_identity_file(options, "~/",
1960: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.50 markus 1961: }
1.27 markus 1962: }
1.17 markus 1963: if (options->escape_char == -1)
1964: options->escape_char = '~';
1.193 djm 1965: if (options->num_system_hostfiles == 0) {
1966: options->system_hostfiles[options->num_system_hostfiles++] =
1967: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1968: options->system_hostfiles[options->num_system_hostfiles++] =
1969: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1970: }
1971: if (options->num_user_hostfiles == 0) {
1972: options->user_hostfiles[options->num_user_hostfiles++] =
1973: xstrdup(_PATH_SSH_USER_HOSTFILE);
1974: options->user_hostfiles[options->num_user_hostfiles++] =
1975: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1976: }
1.95 markus 1977: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1978: options->log_level = SYSLOG_LEVEL_INFO;
1.91 markus 1979: if (options->no_host_authentication_for_localhost == - 1)
1980: options->no_host_authentication_for_localhost = 0;
1.128 markus 1981: if (options->identities_only == -1)
1982: options->identities_only = 0;
1.101 markus 1983: if (options->enable_ssh_keysign == -1)
1984: options->enable_ssh_keysign = 0;
1.105 markus 1985: if (options->rekey_limit == -1)
1986: options->rekey_limit = 0;
1.198 dtucker 1987: if (options->rekey_interval == -1)
1988: options->rekey_interval = 0;
1.107 jakob 1989: if (options->verify_host_key_dns == -1)
1990: options->verify_host_key_dns = 0;
1.127 markus 1991: if (options->server_alive_interval == -1)
1992: options->server_alive_interval = 0;
1993: if (options->server_alive_count_max == -1)
1994: options->server_alive_count_max = 3;
1.132 djm 1995: if (options->control_master == -1)
1996: options->control_master = 0;
1.187 djm 1997: if (options->control_persist == -1) {
1998: options->control_persist = 0;
1999: options->control_persist_timeout = 0;
2000: }
1.136 djm 2001: if (options->hash_known_hosts == -1)
2002: options->hash_known_hosts = 0;
1.144 reyk 2003: if (options->tun_open == -1)
1.145 reyk 2004: options->tun_open = SSH_TUNMODE_NO;
2005: if (options->tun_local == -1)
2006: options->tun_local = SSH_TUNID_ANY;
2007: if (options->tun_remote == -1)
2008: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 2009: if (options->permit_local_command == -1)
2010: options->permit_local_command = 0;
1.167 grunk 2011: if (options->visual_host_key == -1)
2012: options->visual_host_key = 0;
1.190 djm 2013: if (options->ip_qos_interactive == -1)
2014: options->ip_qos_interactive = IPTOS_LOWDELAY;
2015: if (options->ip_qos_bulk == -1)
2016: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 2017: if (options->request_tty == -1)
2018: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 2019: if (options->proxy_use_fdpass == -1)
2020: options->proxy_use_fdpass = 0;
1.209 djm 2021: if (options->canonicalize_max_dots == -1)
2022: options->canonicalize_max_dots = 1;
2023: if (options->canonicalize_fallback_local == -1)
2024: options->canonicalize_fallback_local = 1;
2025: if (options->canonicalize_hostname == -1)
2026: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.224 djm 2027: if (options->fingerprint_hash == -1)
2028: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.229 djm 2029: if (options->update_hostkeys == -1)
1.231 djm 2030: options->update_hostkeys = 0;
1.239 djm 2031: if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 ||
2032: kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 ||
2033: kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 ||
2034: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2035: &options->hostbased_key_types) != 0 ||
2036: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2037: &options->pubkey_key_types) != 0)
2038: fatal("%s: kex_assemble_names failed", __func__);
1.224 djm 2039:
1.207 djm 2040: #define CLEAR_ON_NONE(v) \
2041: do { \
1.218 djm 2042: if (option_clear_or_none(v)) { \
1.207 djm 2043: free(v); \
2044: v = NULL; \
2045: } \
2046: } while(0)
2047: CLEAR_ON_NONE(options->local_command);
2048: CLEAR_ON_NONE(options->proxy_command);
2049: CLEAR_ON_NONE(options->control_path);
1.223 djm 2050: CLEAR_ON_NONE(options->revoked_host_keys);
1.254 markus 2051: /* options->identity_agent distinguishes NULL from 'none' */
1.17 markus 2052: /* options->user will be set in the main program if appropriate */
2053: /* options->hostname will be set in the main program if appropriate */
1.52 markus 2054: /* options->host_key_alias should not be set by default */
1.67 markus 2055: /* options->preferred_authentications will be set in ssh */
1.135 djm 2056: }
2057:
1.220 millert 2058: struct fwdarg {
2059: char *arg;
2060: int ispath;
2061: };
2062:
2063: /*
2064: * parse_fwd_field
2065: * parses the next field in a port forwarding specification.
2066: * sets fwd to the parsed field and advances p past the colon
2067: * or sets it to NULL at end of string.
2068: * returns 0 on success, else non-zero.
2069: */
2070: static int
2071: parse_fwd_field(char **p, struct fwdarg *fwd)
2072: {
2073: char *ep, *cp = *p;
2074: int ispath = 0;
2075:
2076: if (*cp == '\0') {
2077: *p = NULL;
2078: return -1; /* end of string */
2079: }
2080:
2081: /*
2082: * A field escaped with square brackets is used literally.
2083: * XXX - allow ']' to be escaped via backslash?
2084: */
2085: if (*cp == '[') {
2086: /* find matching ']' */
2087: for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
2088: if (*ep == '/')
2089: ispath = 1;
2090: }
2091: /* no matching ']' or not at end of field. */
2092: if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
2093: return -1;
2094: /* NUL terminate the field and advance p past the colon */
2095: *ep++ = '\0';
2096: if (*ep != '\0')
2097: *ep++ = '\0';
2098: fwd->arg = cp + 1;
2099: fwd->ispath = ispath;
2100: *p = ep;
2101: return 0;
2102: }
2103:
2104: for (cp = *p; *cp != '\0'; cp++) {
2105: switch (*cp) {
2106: case '\\':
2107: memmove(cp, cp + 1, strlen(cp + 1) + 1);
1.237 djm 2108: if (*cp == '\0')
2109: return -1;
1.220 millert 2110: break;
2111: case '/':
2112: ispath = 1;
2113: break;
2114: case ':':
2115: *cp++ = '\0';
2116: goto done;
2117: }
2118: }
2119: done:
2120: fwd->arg = *p;
2121: fwd->ispath = ispath;
2122: *p = cp;
2123: return 0;
2124: }
2125:
1.135 djm 2126: /*
2127: * parse_forward
2128: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 2129: * dynamicfwd == 0
1.220 millert 2130: * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
2131: * listenpath:connectpath
1.168 stevesk 2132: * dynamicfwd == 1
2133: * [listenhost:]listenport
1.135 djm 2134: * returns number of arguments parsed or zero on error
2135: */
2136: int
1.220 millert 2137: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 2138: {
1.220 millert 2139: struct fwdarg fwdargs[4];
2140: char *p, *cp;
1.135 djm 2141: int i;
2142:
1.220 millert 2143: memset(fwd, 0, sizeof(*fwd));
2144: memset(fwdargs, 0, sizeof(fwdargs));
1.135 djm 2145:
2146: cp = p = xstrdup(fwdspec);
2147:
2148: /* skip leading spaces */
1.214 deraadt 2149: while (isspace((u_char)*cp))
1.135 djm 2150: cp++;
2151:
1.220 millert 2152: for (i = 0; i < 4; ++i) {
2153: if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.135 djm 2154: break;
1.220 millert 2155: }
1.135 djm 2156:
1.170 stevesk 2157: /* Check for trailing garbage */
1.220 millert 2158: if (cp != NULL && *cp != '\0') {
1.135 djm 2159: i = 0; /* failure */
1.220 millert 2160: }
1.135 djm 2161:
2162: switch (i) {
1.168 stevesk 2163: case 1:
1.220 millert 2164: if (fwdargs[0].ispath) {
2165: fwd->listen_path = xstrdup(fwdargs[0].arg);
2166: fwd->listen_port = PORT_STREAMLOCAL;
2167: } else {
2168: fwd->listen_host = NULL;
2169: fwd->listen_port = a2port(fwdargs[0].arg);
2170: }
1.168 stevesk 2171: fwd->connect_host = xstrdup("socks");
2172: break;
2173:
2174: case 2:
1.220 millert 2175: if (fwdargs[0].ispath && fwdargs[1].ispath) {
2176: fwd->listen_path = xstrdup(fwdargs[0].arg);
2177: fwd->listen_port = PORT_STREAMLOCAL;
2178: fwd->connect_path = xstrdup(fwdargs[1].arg);
2179: fwd->connect_port = PORT_STREAMLOCAL;
2180: } else if (fwdargs[1].ispath) {
2181: fwd->listen_host = NULL;
2182: fwd->listen_port = a2port(fwdargs[0].arg);
2183: fwd->connect_path = xstrdup(fwdargs[1].arg);
2184: fwd->connect_port = PORT_STREAMLOCAL;
2185: } else {
2186: fwd->listen_host = xstrdup(fwdargs[0].arg);
2187: fwd->listen_port = a2port(fwdargs[1].arg);
2188: fwd->connect_host = xstrdup("socks");
2189: }
1.168 stevesk 2190: break;
2191:
1.135 djm 2192: case 3:
1.220 millert 2193: if (fwdargs[0].ispath) {
2194: fwd->listen_path = xstrdup(fwdargs[0].arg);
2195: fwd->listen_port = PORT_STREAMLOCAL;
2196: fwd->connect_host = xstrdup(fwdargs[1].arg);
2197: fwd->connect_port = a2port(fwdargs[2].arg);
2198: } else if (fwdargs[2].ispath) {
2199: fwd->listen_host = xstrdup(fwdargs[0].arg);
2200: fwd->listen_port = a2port(fwdargs[1].arg);
2201: fwd->connect_path = xstrdup(fwdargs[2].arg);
2202: fwd->connect_port = PORT_STREAMLOCAL;
2203: } else {
2204: fwd->listen_host = NULL;
2205: fwd->listen_port = a2port(fwdargs[0].arg);
2206: fwd->connect_host = xstrdup(fwdargs[1].arg);
2207: fwd->connect_port = a2port(fwdargs[2].arg);
2208: }
1.135 djm 2209: break;
2210:
2211: case 4:
1.220 millert 2212: fwd->listen_host = xstrdup(fwdargs[0].arg);
2213: fwd->listen_port = a2port(fwdargs[1].arg);
2214: fwd->connect_host = xstrdup(fwdargs[2].arg);
2215: fwd->connect_port = a2port(fwdargs[3].arg);
1.135 djm 2216: break;
2217: default:
2218: i = 0; /* failure */
2219: }
2220:
1.202 djm 2221: free(p);
1.135 djm 2222:
1.168 stevesk 2223: if (dynamicfwd) {
2224: if (!(i == 1 || i == 2))
2225: goto fail_free;
2226: } else {
1.220 millert 2227: if (!(i == 3 || i == 4)) {
2228: if (fwd->connect_path == NULL &&
2229: fwd->listen_path == NULL)
2230: goto fail_free;
2231: }
2232: if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.168 stevesk 2233: goto fail_free;
2234: }
2235:
1.220 millert 2236: if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
2237: (!remotefwd && fwd->listen_port == 0))
1.135 djm 2238: goto fail_free;
2239: if (fwd->connect_host != NULL &&
2240: strlen(fwd->connect_host) >= NI_MAXHOST)
2241: goto fail_free;
1.220 millert 2242: /* XXX - if connecting to a remote socket, max sun len may not match this host */
2243: if (fwd->connect_path != NULL &&
2244: strlen(fwd->connect_path) >= PATH_MAX_SUN)
2245: goto fail_free;
1.176 djm 2246: if (fwd->listen_host != NULL &&
2247: strlen(fwd->listen_host) >= NI_MAXHOST)
2248: goto fail_free;
1.220 millert 2249: if (fwd->listen_path != NULL &&
2250: strlen(fwd->listen_path) >= PATH_MAX_SUN)
2251: goto fail_free;
1.135 djm 2252:
2253: return (i);
2254:
2255: fail_free:
1.202 djm 2256: free(fwd->connect_host);
2257: fwd->connect_host = NULL;
1.220 millert 2258: free(fwd->connect_path);
2259: fwd->connect_path = NULL;
1.202 djm 2260: free(fwd->listen_host);
2261: fwd->listen_host = NULL;
1.220 millert 2262: free(fwd->listen_path);
2263: fwd->listen_path = NULL;
1.135 djm 2264: return (0);
1.221 djm 2265: }
2266:
1.257 ! djm 2267: int
! 2268: parse_jump(const char *s, Options *o, int active)
! 2269: {
! 2270: char *orig, *sdup, *cp;
! 2271: char *host = NULL, *user = NULL;
! 2272: int ret = -1, port = -1;
! 2273:
! 2274: active &= o->proxy_command == NULL && o->jump_host == NULL;
! 2275:
! 2276: orig = sdup = xstrdup(s);
! 2277: while ((cp = strsep(&sdup, ",")) && cp != NULL) {
! 2278: if (active) {
! 2279: /* First argument and configuration is active */
! 2280: if (parse_user_host_port(cp, &user, &host, &port) != 0)
! 2281: goto out;
! 2282: } else {
! 2283: /* Subsequent argument or inactive configuration */
! 2284: if (parse_user_host_port(cp, NULL, NULL, NULL) != 0)
! 2285: goto out;
! 2286: }
! 2287: active = 0; /* only check syntax for subsequent hosts */
! 2288: }
! 2289: /* success */
! 2290: free(orig);
! 2291: o->jump_user = user;
! 2292: o->jump_host = host;
! 2293: o->jump_port = port;
! 2294: o->proxy_command = xstrdup("none");
! 2295: user = host = NULL;
! 2296: if ((cp = strchr(s, ',')) != NULL && cp[1] != '\0')
! 2297: o->jump_extra = xstrdup(cp + 1);
! 2298: ret = 0;
! 2299: out:
! 2300: free(user);
! 2301: free(host);
! 2302: return ret;
! 2303: }
! 2304:
1.221 djm 2305: /* XXX the following is a near-vebatim copy from servconf.c; refactor */
2306: static const char *
2307: fmt_multistate_int(int val, const struct multistate *m)
2308: {
2309: u_int i;
2310:
2311: for (i = 0; m[i].key != NULL; i++) {
2312: if (m[i].value == val)
2313: return m[i].key;
2314: }
2315: return "UNKNOWN";
2316: }
2317:
2318: static const char *
2319: fmt_intarg(OpCodes code, int val)
2320: {
2321: if (val == -1)
2322: return "unset";
2323: switch (code) {
2324: case oAddressFamily:
2325: return fmt_multistate_int(val, multistate_addressfamily);
2326: case oVerifyHostKeyDNS:
2327: case oStrictHostKeyChecking:
1.232 djm 2328: case oUpdateHostkeys:
1.221 djm 2329: return fmt_multistate_int(val, multistate_yesnoask);
2330: case oControlMaster:
2331: return fmt_multistate_int(val, multistate_controlmaster);
2332: case oTunnel:
2333: return fmt_multistate_int(val, multistate_tunnel);
2334: case oRequestTTY:
2335: return fmt_multistate_int(val, multistate_requesttty);
2336: case oCanonicalizeHostname:
2337: return fmt_multistate_int(val, multistate_canonicalizehostname);
1.224 djm 2338: case oFingerprintHash:
2339: return ssh_digest_alg_name(val);
1.221 djm 2340: case oProtocol:
2341: switch (val) {
2342: case SSH_PROTO_1:
2343: return "1";
2344: case SSH_PROTO_2:
2345: return "2";
2346: case (SSH_PROTO_1|SSH_PROTO_2):
2347: return "2,1";
2348: default:
2349: return "UNKNOWN";
2350: }
2351: default:
2352: switch (val) {
2353: case 0:
2354: return "no";
2355: case 1:
2356: return "yes";
2357: default:
2358: return "UNKNOWN";
2359: }
2360: }
2361: }
2362:
2363: static const char *
2364: lookup_opcode_name(OpCodes code)
2365: {
2366: u_int i;
2367:
2368: for (i = 0; keywords[i].name != NULL; i++)
2369: if (keywords[i].opcode == code)
2370: return(keywords[i].name);
2371: return "UNKNOWN";
2372: }
2373:
2374: static void
2375: dump_cfg_int(OpCodes code, int val)
2376: {
2377: printf("%s %d\n", lookup_opcode_name(code), val);
2378: }
2379:
2380: static void
2381: dump_cfg_fmtint(OpCodes code, int val)
2382: {
2383: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2384: }
2385:
2386: static void
2387: dump_cfg_string(OpCodes code, const char *val)
2388: {
2389: if (val == NULL)
2390: return;
2391: printf("%s %s\n", lookup_opcode_name(code), val);
2392: }
2393:
2394: static void
2395: dump_cfg_strarray(OpCodes code, u_int count, char **vals)
2396: {
2397: u_int i;
2398:
2399: for (i = 0; i < count; i++)
2400: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2401: }
2402:
2403: static void
2404: dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
2405: {
2406: u_int i;
2407:
2408: printf("%s", lookup_opcode_name(code));
2409: for (i = 0; i < count; i++)
2410: printf(" %s", vals[i]);
2411: printf("\n");
2412: }
2413:
2414: static void
2415: dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
2416: {
2417: const struct Forward *fwd;
2418: u_int i;
2419:
2420: /* oDynamicForward */
2421: for (i = 0; i < count; i++) {
2422: fwd = &fwds[i];
2423: if (code == oDynamicForward &&
2424: strcmp(fwd->connect_host, "socks") != 0)
2425: continue;
2426: if (code == oLocalForward &&
2427: strcmp(fwd->connect_host, "socks") == 0)
2428: continue;
2429: printf("%s", lookup_opcode_name(code));
2430: if (fwd->listen_port == PORT_STREAMLOCAL)
2431: printf(" %s", fwd->listen_path);
2432: else if (fwd->listen_host == NULL)
2433: printf(" %d", fwd->listen_port);
2434: else {
2435: printf(" [%s]:%d",
2436: fwd->listen_host, fwd->listen_port);
2437: }
2438: if (code != oDynamicForward) {
2439: if (fwd->connect_port == PORT_STREAMLOCAL)
2440: printf(" %s", fwd->connect_path);
2441: else if (fwd->connect_host == NULL)
2442: printf(" %d", fwd->connect_port);
2443: else {
2444: printf(" [%s]:%d",
2445: fwd->connect_host, fwd->connect_port);
2446: }
2447: }
2448: printf("\n");
2449: }
2450: }
2451:
2452: void
2453: dump_client_config(Options *o, const char *host)
2454: {
2455: int i;
1.257 ! djm 2456: char buf[8];
1.221 djm 2457:
1.240 djm 2458: /* This is normally prepared in ssh_kex2 */
2459: if (kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->hostkeyalgorithms) != 0)
2460: fatal("%s: kex_assemble_names failed", __func__);
2461:
1.221 djm 2462: /* Most interesting options first: user, host, port */
2463: dump_cfg_string(oUser, o->user);
2464: dump_cfg_string(oHostName, host);
2465: dump_cfg_int(oPort, o->port);
2466:
2467: /* Flag options */
2468: dump_cfg_fmtint(oAddressFamily, o->address_family);
2469: dump_cfg_fmtint(oBatchMode, o->batch_mode);
2470: dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
2471: dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
2472: dump_cfg_fmtint(oChallengeResponseAuthentication, o->challenge_response_authentication);
2473: dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
2474: dump_cfg_fmtint(oCompression, o->compression);
2475: dump_cfg_fmtint(oControlMaster, o->control_master);
2476: dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
1.256 dtucker 2477: dump_cfg_fmtint(oClearAllForwardings, o->clear_forwardings);
1.221 djm 2478: dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
1.224 djm 2479: dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
1.221 djm 2480: dump_cfg_fmtint(oForwardAgent, o->forward_agent);
2481: dump_cfg_fmtint(oForwardX11, o->forward_x11);
2482: dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
2483: dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
2484: #ifdef GSSAPI
2485: dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
2486: dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
2487: #endif /* GSSAPI */
2488: dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
2489: dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
2490: dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
2491: dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
2492: dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
2493: dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
2494: dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
2495: dump_cfg_fmtint(oProtocol, o->protocol);
2496: dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
2497: dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
2498: dump_cfg_fmtint(oRequestTTY, o->request_tty);
2499: dump_cfg_fmtint(oRhostsRSAAuthentication, o->rhosts_rsa_authentication);
2500: dump_cfg_fmtint(oRSAAuthentication, o->rsa_authentication);
2501: dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
2502: dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
2503: dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
2504: dump_cfg_fmtint(oTunnel, o->tun_open);
2505: dump_cfg_fmtint(oUsePrivilegedPort, o->use_privileged_port);
2506: dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
2507: dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
1.229 djm 2508: dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
1.221 djm 2509:
2510: /* Integer options */
2511: dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
2512: dump_cfg_int(oCompressionLevel, o->compression_level);
2513: dump_cfg_int(oConnectionAttempts, o->connection_attempts);
2514: dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
2515: dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
2516: dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
2517: dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
2518:
2519: /* String options */
2520: dump_cfg_string(oBindAddress, o->bind_address);
2521: dump_cfg_string(oCiphers, o->ciphers ? o->ciphers : KEX_CLIENT_ENCRYPT);
2522: dump_cfg_string(oControlPath, o->control_path);
1.240 djm 2523: dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
1.221 djm 2524: dump_cfg_string(oHostKeyAlias, o->host_key_alias);
1.230 djm 2525: dump_cfg_string(oHostbasedKeyTypes, o->hostbased_key_types);
1.253 markus 2526: dump_cfg_string(oIdentityAgent, o->identity_agent);
1.221 djm 2527: dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
2528: dump_cfg_string(oKexAlgorithms, o->kex_algorithms ? o->kex_algorithms : KEX_CLIENT_KEX);
2529: dump_cfg_string(oLocalCommand, o->local_command);
2530: dump_cfg_string(oLogLevel, log_level_name(o->log_level));
2531: dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC);
2532: dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
2533: dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
1.242 djm 2534: dump_cfg_string(oPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.230 djm 2535: dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
1.221 djm 2536: dump_cfg_string(oXAuthLocation, o->xauth_location);
2537:
1.230 djm 2538: /* Forwards */
1.221 djm 2539: dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
2540: dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
2541: dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
2542:
2543: /* String array options */
2544: dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
2545: dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
2546: dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
2547: dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
2548: dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
2549:
2550: /* Special cases */
2551:
2552: /* oConnectTimeout */
2553: if (o->connection_timeout == -1)
2554: printf("connecttimeout none\n");
2555: else
2556: dump_cfg_int(oConnectTimeout, o->connection_timeout);
2557:
2558: /* oTunnelDevice */
2559: printf("tunneldevice");
2560: if (o->tun_local == SSH_TUNID_ANY)
2561: printf(" any");
2562: else
2563: printf(" %d", o->tun_local);
2564: if (o->tun_remote == SSH_TUNID_ANY)
2565: printf(":any");
2566: else
2567: printf(":%d", o->tun_remote);
2568: printf("\n");
2569:
2570: /* oCanonicalizePermittedCNAMEs */
2571: if ( o->num_permitted_cnames > 0) {
2572: printf("canonicalizePermittedcnames");
2573: for (i = 0; i < o->num_permitted_cnames; i++) {
2574: printf(" %s:%s", o->permitted_cnames[i].source_list,
2575: o->permitted_cnames[i].target_list);
2576: }
2577: printf("\n");
2578: }
2579:
2580: /* oCipher */
2581: if (o->cipher != SSH_CIPHER_NOT_SET)
2582: printf("Cipher %s\n", cipher_name(o->cipher));
2583:
2584: /* oControlPersist */
2585: if (o->control_persist == 0 || o->control_persist_timeout == 0)
2586: dump_cfg_fmtint(oControlPersist, o->control_persist);
2587: else
2588: dump_cfg_int(oControlPersist, o->control_persist_timeout);
2589:
2590: /* oEscapeChar */
2591: if (o->escape_char == SSH_ESCAPECHAR_NONE)
2592: printf("escapechar none\n");
2593: else {
1.257 ! djm 2594: vis(buf, o->escape_char, VIS_WHITE, 0);
! 2595: printf("escapechar %s\n", buf);
1.221 djm 2596: }
2597:
2598: /* oIPQoS */
2599: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2600: printf("%s\n", iptos2str(o->ip_qos_bulk));
2601:
2602: /* oRekeyLimit */
1.249 dtucker 2603: printf("rekeylimit %llu %d\n",
2604: (unsigned long long)o->rekey_limit, o->rekey_interval);
1.221 djm 2605:
2606: /* oStreamLocalBindMask */
2607: printf("streamlocalbindmask 0%o\n",
2608: o->fwd_opts.streamlocal_bind_mask);
1.257 ! djm 2609:
! 2610: /* oProxyCommand / oProxyJump */
! 2611: if (o->jump_host == NULL)
! 2612: dump_cfg_string(oProxyCommand, o->proxy_command);
! 2613: else {
! 2614: /* Check for numeric addresses */
! 2615: i = strchr(o->jump_host, ':') != NULL ||
! 2616: strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
! 2617: snprintf(buf, sizeof(buf), "%d", o->jump_port);
! 2618: printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
! 2619: /* optional user */
! 2620: o->jump_user == NULL ? "" : o->jump_user,
! 2621: o->jump_user == NULL ? "" : "@",
! 2622: /* opening [ if hostname is numeric */
! 2623: i ? "[" : "",
! 2624: /* mandatory hostname */
! 2625: o->jump_host,
! 2626: /* closing ] if hostname is numeric */
! 2627: i ? "]" : "",
! 2628: /* optional port number */
! 2629: o->jump_port <= 0 ? "" : ":",
! 2630: o->jump_port <= 0 ? "" : buf,
! 2631: /* optional additional jump spec */
! 2632: o->jump_extra == NULL ? "" : ",",
! 2633: o->jump_extra == NULL ? "" : o->jump_extra);
! 2634: }
1.1 deraadt 2635: }
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