Annotation of src/usr.bin/ssh/readconf.c, Revision 1.253
1.253 ! markus 1: /* $OpenBSD: readconf.c,v 1.252 2016/04/15 00:30:19 djm Exp $ */
1.1 deraadt 2: /*
1.18 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Functions for reading the configuration files.
1.26 markus 7: *
1.46 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 13: */
1.1 deraadt 14:
1.147 stevesk 15: #include <sys/types.h>
16: #include <sys/stat.h>
1.152 stevesk 17: #include <sys/socket.h>
1.206 djm 18: #include <sys/wait.h>
1.220 millert 19: #include <sys/un.h>
1.152 stevesk 20:
21: #include <netinet/in.h>
1.190 djm 22: #include <netinet/ip.h>
1.148 stevesk 23:
24: #include <ctype.h>
1.154 stevesk 25: #include <errno.h>
1.206 djm 26: #include <fcntl.h>
1.252 djm 27: #include <glob.h>
1.155 stevesk 28: #include <netdb.h>
1.206 djm 29: #include <paths.h>
30: #include <pwd.h>
1.159 deraadt 31: #include <signal.h>
1.158 stevesk 32: #include <stdio.h>
1.157 stevesk 33: #include <string.h>
1.156 stevesk 34: #include <unistd.h>
1.228 deraadt 35: #include <limits.h>
1.200 dtucker 36: #include <util.h>
1.221 djm 37: #include <vis.h>
1.1 deraadt 38:
1.159 deraadt 39: #include "xmalloc.h"
1.1 deraadt 40: #include "ssh.h"
1.25 markus 41: #include "compat.h"
1.58 markus 42: #include "cipher.h"
1.55 markus 43: #include "pathnames.h"
1.58 markus 44: #include "log.h"
1.227 djm 45: #include "sshkey.h"
1.220 millert 46: #include "misc.h"
1.58 markus 47: #include "readconf.h"
48: #include "match.h"
1.62 markus 49: #include "kex.h"
50: #include "mac.h"
1.206 djm 51: #include "uidswap.h"
1.221 djm 52: #include "myproposal.h"
1.224 djm 53: #include "digest.h"
1.1 deraadt 54:
55: /* Format of the configuration file:
56:
57: # Configuration data is parsed as follows:
58: # 1. command line options
59: # 2. user-specific file
60: # 3. system-wide file
61: # Any configuration value is only changed the first time it is set.
62: # Thus, host-specific definitions should be at the beginning of the
63: # configuration file, and defaults at the end.
64:
65: # Host-specific declarations. These may override anything above. A single
66: # host may match multiple declarations; these are processed in the order
67: # that they are given in.
68:
69: Host *.ngs.fi ngs.fi
1.96 markus 70: User foo
1.1 deraadt 71:
72: Host fake.com
73: HostName another.host.name.real.org
74: User blaah
75: Port 34289
76: ForwardX11 no
77: ForwardAgent no
78:
79: Host books.com
80: RemoteForward 9999 shadows.cs.hut.fi:9999
81: Cipher 3des
82:
83: Host fascist.blob.com
84: Port 23123
85: User tylonen
86: PasswordAuthentication no
87:
88: Host puukko.hut.fi
89: User t35124p
90: ProxyCommand ssh-proxy %h %p
91:
92: Host *.fr
1.96 markus 93: PublicKeyAuthentication no
1.1 deraadt 94:
95: Host *.su
96: Cipher none
97: PasswordAuthentication no
98:
1.144 reyk 99: Host vpn.fake.com
100: Tunnel yes
101: TunnelDevice 3
102:
1.1 deraadt 103: # Defaults for various options
104: Host *
105: ForwardAgent no
1.50 markus 106: ForwardX11 no
1.1 deraadt 107: PasswordAuthentication yes
108: RSAAuthentication yes
109: RhostsRSAAuthentication yes
110: StrictHostKeyChecking yes
1.126 markus 111: TcpKeepAlive no
1.1 deraadt 112: IdentityFile ~/.ssh/identity
113: Port 22
114: EscapeChar ~
115:
116: */
117:
1.252 djm 118: static int read_config_file_depth(const char *filename, struct passwd *pw,
119: const char *host, const char *original_host, Options *options,
120: int flags, int *activep, int depth);
121: static int process_config_line_depth(Options *options, struct passwd *pw,
122: const char *host, const char *original_host, char *line,
123: const char *filename, int linenum, int *activep, int flags, int depth);
124:
1.1 deraadt 125: /* Keyword tokens. */
126:
1.17 markus 127: typedef enum {
128: oBadOption,
1.252 djm 129: oHost, oMatch, oInclude,
1.186 djm 130: oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
131: oGatewayPorts, oExitOnForwardFailure,
1.100 deraadt 132: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 133: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 134: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
1.253 ! markus 135: oCertificateFile, oAddKeysToAgent, oIdentityAgent,
1.206 djm 136: oUser, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
1.17 markus 137: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
138: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 139: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 140: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.221 djm 141: oPubkeyAuthentication,
1.67 markus 142: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 143: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.183 markus 144: oHostKeyAlgorithms, oBindAddress, oPKCS11Provider,
1.96 markus 145: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 146: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 147: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 148: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.187 djm 149: oSendEnv, oControlPath, oControlMaster, oControlPersist,
150: oHashKnownHosts,
1.144 reyk 151: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.248 markus 152: oVisualHostKey,
1.205 djm 153: oKexAlgorithms, oIPQoS, oRequestTTY, oIgnoreUnknown, oProxyUseFdpass,
1.209 djm 154: oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
155: oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
1.223 djm 156: oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
1.230 djm 157: oFingerprintHash, oUpdateHostkeys, oHostbasedKeyTypes,
1.238 markus 158: oPubkeyAcceptedKeyTypes,
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 },
1.171 djm 283:
1.92 stevesk 284: { NULL, oBadOption }
1.13 markus 285: };
286:
1.19 markus 287: /*
288: * Adds a local TCP/IP port forward to options. Never returns if there is an
289: * error.
290: */
1.1 deraadt 291:
1.26 markus 292: void
1.220 millert 293: add_local_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 294: {
1.220 millert 295: struct Forward *fwd;
1.17 markus 296: extern uid_t original_real_uid;
1.251 djm 297: int i;
1.185 djm 298:
1.220 millert 299: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0 &&
300: newfwd->listen_path == NULL)
1.64 millert 301: fatal("Privileged ports can only be forwarded by root.");
1.251 djm 302: /* Don't add duplicates */
303: for (i = 0; i < options->num_local_forwards; i++) {
304: if (forward_equals(newfwd, options->local_forwards + i))
305: return;
306: }
1.234 deraadt 307: options->local_forwards = xreallocarray(options->local_forwards,
1.185 djm 308: options->num_local_forwards + 1,
309: sizeof(*options->local_forwards));
1.17 markus 310: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 311:
1.172 stevesk 312: fwd->listen_host = newfwd->listen_host;
1.135 djm 313: fwd->listen_port = newfwd->listen_port;
1.220 millert 314: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 315: fwd->connect_host = newfwd->connect_host;
1.135 djm 316: fwd->connect_port = newfwd->connect_port;
1.220 millert 317: fwd->connect_path = newfwd->connect_path;
1.1 deraadt 318: }
319:
1.19 markus 320: /*
321: * Adds a remote TCP/IP port forward to options. Never returns if there is
322: * an error.
323: */
1.1 deraadt 324:
1.26 markus 325: void
1.220 millert 326: add_remote_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 327: {
1.220 millert 328: struct Forward *fwd;
1.251 djm 329: int i;
1.185 djm 330:
1.251 djm 331: /* Don't add duplicates */
332: for (i = 0; i < options->num_remote_forwards; i++) {
333: if (forward_equals(newfwd, options->remote_forwards + i))
334: return;
335: }
1.234 deraadt 336: options->remote_forwards = xreallocarray(options->remote_forwards,
1.185 djm 337: options->num_remote_forwards + 1,
338: sizeof(*options->remote_forwards));
1.17 markus 339: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 340:
1.172 stevesk 341: fwd->listen_host = newfwd->listen_host;
1.135 djm 342: fwd->listen_port = newfwd->listen_port;
1.220 millert 343: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 344: fwd->connect_host = newfwd->connect_host;
1.135 djm 345: fwd->connect_port = newfwd->connect_port;
1.220 millert 346: fwd->connect_path = newfwd->connect_path;
1.194 markus 347: fwd->handle = newfwd->handle;
1.184 markus 348: fwd->allocated_port = 0;
1.1 deraadt 349: }
350:
1.90 stevesk 351: static void
352: clear_forwardings(Options *options)
353: {
354: int i;
355:
1.135 djm 356: for (i = 0; i < options->num_local_forwards; i++) {
1.202 djm 357: free(options->local_forwards[i].listen_host);
1.220 millert 358: free(options->local_forwards[i].listen_path);
1.202 djm 359: free(options->local_forwards[i].connect_host);
1.220 millert 360: free(options->local_forwards[i].connect_path);
1.135 djm 361: }
1.185 djm 362: if (options->num_local_forwards > 0) {
1.202 djm 363: free(options->local_forwards);
1.185 djm 364: options->local_forwards = NULL;
365: }
1.90 stevesk 366: options->num_local_forwards = 0;
1.135 djm 367: for (i = 0; i < options->num_remote_forwards; i++) {
1.202 djm 368: free(options->remote_forwards[i].listen_host);
1.220 millert 369: free(options->remote_forwards[i].listen_path);
1.202 djm 370: free(options->remote_forwards[i].connect_host);
1.220 millert 371: free(options->remote_forwards[i].connect_path);
1.135 djm 372: }
1.185 djm 373: if (options->num_remote_forwards > 0) {
1.202 djm 374: free(options->remote_forwards);
1.185 djm 375: options->remote_forwards = NULL;
376: }
1.90 stevesk 377: options->num_remote_forwards = 0;
1.145 reyk 378: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 379: }
380:
1.195 dtucker 381: void
1.241 djm 382: add_certificate_file(Options *options, const char *path, int userprovided)
383: {
384: int i;
385:
386: if (options->num_certificate_files >= SSH_MAX_CERTIFICATE_FILES)
387: fatal("Too many certificate files specified (max %d)",
388: SSH_MAX_CERTIFICATE_FILES);
389:
390: /* Avoid registering duplicates */
391: for (i = 0; i < options->num_certificate_files; i++) {
392: if (options->certificate_file_userprovided[i] == userprovided &&
393: strcmp(options->certificate_files[i], path) == 0) {
394: debug2("%s: ignoring duplicate key %s", __func__, path);
395: return;
396: }
397: }
398:
399: options->certificate_file_userprovided[options->num_certificate_files] =
400: userprovided;
401: options->certificate_files[options->num_certificate_files++] =
402: xstrdup(path);
403: }
404:
405: void
1.195 dtucker 406: add_identity_file(Options *options, const char *dir, const char *filename,
407: int userprovided)
408: {
409: char *path;
1.219 djm 410: int i;
1.195 dtucker 411:
412: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
413: fatal("Too many identity files specified (max %d)",
414: SSH_MAX_IDENTITY_FILES);
415:
416: if (dir == NULL) /* no dir, filename is absolute */
417: path = xstrdup(filename);
418: else
419: (void)xasprintf(&path, "%.100s%.100s", dir, filename);
1.219 djm 420:
421: /* Avoid registering duplicates */
422: for (i = 0; i < options->num_identity_files; i++) {
423: if (options->identity_file_userprovided[i] == userprovided &&
424: strcmp(options->identity_files[i], path) == 0) {
425: debug2("%s: ignoring duplicate key %s", __func__, path);
426: free(path);
427: return;
428: }
429: }
1.195 dtucker 430:
431: options->identity_file_userprovided[options->num_identity_files] =
432: userprovided;
433: options->identity_files[options->num_identity_files++] = path;
434: }
435:
1.206 djm 436: int
437: default_ssh_port(void)
438: {
439: static int port;
440: struct servent *sp;
441:
442: if (port == 0) {
443: sp = getservbyname(SSH_SERVICE_NAME, "tcp");
444: port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
445: }
446: return port;
447: }
448:
449: /*
450: * Execute a command in a shell.
451: * Return its exit status or -1 on abnormal exit.
452: */
453: static int
454: execute_in_shell(const char *cmd)
455: {
1.243 dtucker 456: char *shell;
1.206 djm 457: pid_t pid;
458: int devnull, status;
459: extern uid_t original_real_uid;
460:
461: if ((shell = getenv("SHELL")) == NULL)
462: shell = _PATH_BSHELL;
463:
464: /* Need this to redirect subprocess stdin/out */
465: if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
466: fatal("open(/dev/null): %s", strerror(errno));
467:
468: debug("Executing command: '%.500s'", cmd);
469:
470: /* Fork and execute the command. */
471: if ((pid = fork()) == 0) {
1.245 djm 472: char *argv[4];
1.206 djm 473:
474: /* Child. Permanently give up superuser privileges. */
475: permanently_drop_suid(original_real_uid);
476:
477: /* Redirect child stdin and stdout. Leave stderr */
478: if (dup2(devnull, STDIN_FILENO) == -1)
479: fatal("dup2: %s", strerror(errno));
480: if (dup2(devnull, STDOUT_FILENO) == -1)
481: fatal("dup2: %s", strerror(errno));
482: if (devnull > STDERR_FILENO)
483: close(devnull);
484: closefrom(STDERR_FILENO + 1);
1.245 djm 485:
486: argv[0] = shell;
487: argv[1] = "-c";
488: argv[2] = xstrdup(cmd);
489: argv[3] = NULL;
1.206 djm 490:
491: execv(argv[0], argv);
492: error("Unable to execute '%.100s': %s", cmd, strerror(errno));
493: /* Die with signal to make this error apparent to parent. */
494: signal(SIGTERM, SIG_DFL);
495: kill(getpid(), SIGTERM);
496: _exit(1);
497: }
498: /* Parent. */
499: if (pid < 0)
500: fatal("%s: fork: %.100s", __func__, strerror(errno));
501:
502: close(devnull);
503:
504: while (waitpid(pid, &status, 0) == -1) {
505: if (errno != EINTR && errno != EAGAIN)
506: fatal("%s: waitpid: %s", __func__, strerror(errno));
507: }
508: if (!WIFEXITED(status)) {
509: error("command '%.100s' exited abnormally", cmd);
510: return -1;
1.221 djm 511: }
1.206 djm 512: debug3("command returned status %d", WEXITSTATUS(status));
513: return WEXITSTATUS(status);
514: }
515:
516: /*
517: * Parse and execute a Match directive.
518: */
519: static int
520: match_cfg_line(Options *options, char **condition, struct passwd *pw,
1.221 djm 521: const char *host_arg, const char *original_host, int post_canon,
522: const char *filename, int linenum)
1.206 djm 523: {
1.221 djm 524: char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria;
1.211 djm 525: const char *ruser;
1.221 djm 526: int r, port, this_result, result = 1, attributes = 0, negate;
1.206 djm 527: char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
528:
529: /*
530: * Configuration is likely to be incomplete at this point so we
531: * must be prepared to use default values.
532: */
533: port = options->port <= 0 ? default_ssh_port() : options->port;
534: ruser = options->user == NULL ? pw->pw_name : options->user;
1.250 djm 535: if (post_canon) {
536: host = xstrdup(options->hostname);
537: } else if (options->hostname != NULL) {
1.212 djm 538: /* NB. Please keep in sync with ssh.c:main() */
1.211 djm 539: host = percent_expand(options->hostname,
540: "h", host_arg, (char *)NULL);
1.250 djm 541: } else {
1.211 djm 542: host = xstrdup(host_arg);
1.250 djm 543: }
1.206 djm 544:
1.221 djm 545: debug2("checking match for '%s' host %s originally %s",
546: cp, host, original_host);
547: while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') {
548: criteria = NULL;
549: this_result = 1;
550: if ((negate = attrib[0] == '!'))
551: attrib++;
552: /* criteria "all" and "canonical" have no argument */
1.213 dtucker 553: if (strcasecmp(attrib, "all") == 0) {
1.221 djm 554: if (attributes > 1 ||
1.213 dtucker 555: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
1.221 djm 556: error("%.200s line %d: '%s' cannot be combined "
557: "with other Match attributes",
558: filename, linenum, oattrib);
1.213 dtucker 559: result = -1;
560: goto out;
561: }
1.221 djm 562: if (result)
563: result = negate ? 0 : 1;
1.213 dtucker 564: goto out;
565: }
1.221 djm 566: attributes++;
567: if (strcasecmp(attrib, "canonical") == 0) {
568: r = !!post_canon; /* force bitmask member to boolean */
569: if (r == (negate ? 1 : 0))
570: this_result = result = 0;
571: debug3("%.200s line %d: %smatched '%s'",
572: filename, linenum,
573: this_result ? "" : "not ", oattrib);
574: continue;
575: }
576: /* All other criteria require an argument */
1.206 djm 577: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
578: error("Missing Match criteria for %s", attrib);
1.211 djm 579: result = -1;
580: goto out;
1.206 djm 581: }
582: if (strcasecmp(attrib, "host") == 0) {
1.221 djm 583: criteria = xstrdup(host);
1.235 djm 584: r = match_hostname(host, arg) == 1;
1.221 djm 585: if (r == (negate ? 1 : 0))
586: this_result = result = 0;
1.206 djm 587: } else if (strcasecmp(attrib, "originalhost") == 0) {
1.221 djm 588: criteria = xstrdup(original_host);
1.235 djm 589: r = match_hostname(original_host, arg) == 1;
1.221 djm 590: if (r == (negate ? 1 : 0))
591: this_result = result = 0;
1.206 djm 592: } else if (strcasecmp(attrib, "user") == 0) {
1.221 djm 593: criteria = xstrdup(ruser);
1.235 djm 594: r = match_pattern_list(ruser, arg, 0) == 1;
1.221 djm 595: if (r == (negate ? 1 : 0))
596: this_result = result = 0;
1.206 djm 597: } else if (strcasecmp(attrib, "localuser") == 0) {
1.221 djm 598: criteria = xstrdup(pw->pw_name);
1.235 djm 599: r = match_pattern_list(pw->pw_name, arg, 0) == 1;
1.221 djm 600: if (r == (negate ? 1 : 0))
601: this_result = result = 0;
1.210 djm 602: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 603: if (gethostname(thishost, sizeof(thishost)) == -1)
604: fatal("gethostname: %s", strerror(errno));
605: strlcpy(shorthost, thishost, sizeof(shorthost));
606: shorthost[strcspn(thishost, ".")] = '\0';
607: snprintf(portstr, sizeof(portstr), "%d", port);
608:
609: cmd = percent_expand(arg,
610: "L", shorthost,
611: "d", pw->pw_dir,
612: "h", host,
613: "l", thishost,
1.221 djm 614: "n", original_host,
1.206 djm 615: "p", portstr,
616: "r", ruser,
617: "u", pw->pw_name,
618: (char *)NULL);
1.217 djm 619: if (result != 1) {
620: /* skip execution if prior predicate failed */
1.221 djm 621: debug3("%.200s line %d: skipped exec "
622: "\"%.100s\"", filename, linenum, cmd);
623: free(cmd);
624: continue;
625: }
626: r = execute_in_shell(cmd);
627: if (r == -1) {
628: fatal("%.200s line %d: match exec "
629: "'%.100s' error", filename,
630: linenum, cmd);
1.217 djm 631: }
1.221 djm 632: criteria = xstrdup(cmd);
1.206 djm 633: free(cmd);
1.221 djm 634: /* Force exit status to boolean */
635: r = r == 0;
636: if (r == (negate ? 1 : 0))
637: this_result = result = 0;
1.206 djm 638: } else {
639: error("Unsupported Match attribute %s", attrib);
1.211 djm 640: result = -1;
641: goto out;
1.206 djm 642: }
1.221 djm 643: debug3("%.200s line %d: %smatched '%s \"%.100s\"' ",
644: filename, linenum, this_result ? "": "not ",
645: oattrib, criteria);
646: free(criteria);
1.213 dtucker 647: }
648: if (attributes == 0) {
649: error("One or more attributes required for Match");
650: result = -1;
651: goto out;
1.206 djm 652: }
1.221 djm 653: out:
654: if (result != -1)
655: debug2("match %sfound", result ? "" : "not ");
1.206 djm 656: *condition = cp;
1.211 djm 657: free(host);
1.206 djm 658: return result;
659: }
660:
1.208 djm 661: /* Check and prepare a domain name: removes trailing '.' and lowercases */
662: static void
663: valid_domain(char *name, const char *filename, int linenum)
664: {
665: size_t i, l = strlen(name);
666: u_char c, last = '\0';
667:
668: if (l == 0)
669: fatal("%s line %d: empty hostname suffix", filename, linenum);
670: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
671: fatal("%s line %d: hostname suffix \"%.100s\" "
672: "starts with invalid character", filename, linenum, name);
673: for (i = 0; i < l; i++) {
674: c = tolower((u_char)name[i]);
675: name[i] = (char)c;
676: if (last == '.' && c == '.')
677: fatal("%s line %d: hostname suffix \"%.100s\" contains "
678: "consecutive separators", filename, linenum, name);
679: if (c != '.' && c != '-' && !isalnum(c) &&
680: c != '_') /* technically invalid, but common */
681: fatal("%s line %d: hostname suffix \"%.100s\" contains "
682: "invalid characters", filename, linenum, name);
683: last = c;
684: }
685: if (name[l - 1] == '.')
686: name[l - 1] = '\0';
687: }
688:
1.19 markus 689: /*
1.70 stevesk 690: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 691: */
1.26 markus 692: static OpCodes
1.199 djm 693: parse_token(const char *cp, const char *filename, int linenum,
694: const char *ignored_unknown)
1.1 deraadt 695: {
1.199 djm 696: int i;
1.1 deraadt 697:
1.17 markus 698: for (i = 0; keywords[i].name; i++)
1.199 djm 699: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 700: return keywords[i].opcode;
1.235 djm 701: if (ignored_unknown != NULL &&
702: match_pattern_list(cp, ignored_unknown, 1) == 1)
1.199 djm 703: return oIgnoredUnknownOption;
1.75 stevesk 704: error("%s: line %d: Bad configuration option: %s",
705: filename, linenum, cp);
1.17 markus 706: return oBadOption;
1.1 deraadt 707: }
708:
1.207 djm 709: /* Multistate option parsing */
710: struct multistate {
711: char *key;
712: int value;
713: };
714: static const struct multistate multistate_flag[] = {
715: { "true", 1 },
716: { "false", 0 },
717: { "yes", 1 },
718: { "no", 0 },
719: { NULL, -1 }
720: };
721: static const struct multistate multistate_yesnoask[] = {
722: { "true", 1 },
723: { "false", 0 },
724: { "yes", 1 },
725: { "no", 0 },
726: { "ask", 2 },
727: { NULL, -1 }
728: };
1.246 jcs 729: static const struct multistate multistate_yesnoaskconfirm[] = {
730: { "true", 1 },
731: { "false", 0 },
732: { "yes", 1 },
733: { "no", 0 },
734: { "ask", 2 },
735: { "confirm", 3 },
736: { NULL, -1 }
737: };
1.207 djm 738: static const struct multistate multistate_addressfamily[] = {
739: { "inet", AF_INET },
740: { "inet6", AF_INET6 },
741: { "any", AF_UNSPEC },
742: { NULL, -1 }
743: };
744: static const struct multistate multistate_controlmaster[] = {
745: { "true", SSHCTL_MASTER_YES },
746: { "yes", SSHCTL_MASTER_YES },
747: { "false", SSHCTL_MASTER_NO },
748: { "no", SSHCTL_MASTER_NO },
749: { "auto", SSHCTL_MASTER_AUTO },
750: { "ask", SSHCTL_MASTER_ASK },
751: { "autoask", SSHCTL_MASTER_AUTO_ASK },
752: { NULL, -1 }
753: };
754: static const struct multistate multistate_tunnel[] = {
755: { "ethernet", SSH_TUNMODE_ETHERNET },
756: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
757: { "true", SSH_TUNMODE_DEFAULT },
758: { "yes", SSH_TUNMODE_DEFAULT },
759: { "false", SSH_TUNMODE_NO },
760: { "no", SSH_TUNMODE_NO },
761: { NULL, -1 }
762: };
763: static const struct multistate multistate_requesttty[] = {
764: { "true", REQUEST_TTY_YES },
765: { "yes", REQUEST_TTY_YES },
766: { "false", REQUEST_TTY_NO },
767: { "no", REQUEST_TTY_NO },
768: { "force", REQUEST_TTY_FORCE },
769: { "auto", REQUEST_TTY_AUTO },
770: { NULL, -1 }
771: };
1.209 djm 772: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 773: { "true", SSH_CANONICALISE_YES },
774: { "false", SSH_CANONICALISE_NO },
775: { "yes", SSH_CANONICALISE_YES },
776: { "no", SSH_CANONICALISE_NO },
777: { "always", SSH_CANONICALISE_ALWAYS },
778: { NULL, -1 }
779: };
1.207 djm 780:
1.19 markus 781: /*
782: * Processes a single option line as used in the configuration files. This
783: * only sets those values that have not already been set.
784: */
1.14 markus 785: int
1.206 djm 786: process_config_line(Options *options, struct passwd *pw, const char *host,
1.221 djm 787: const char *original_host, char *line, const char *filename,
788: int linenum, int *activep, int flags)
1.1 deraadt 789: {
1.252 djm 790: return process_config_line_depth(options, pw, host, original_host,
791: line, filename, linenum, activep, flags, 0);
792: }
793:
794: #define WHITESPACE " \t\r\n"
795: static int
796: process_config_line_depth(Options *options, struct passwd *pw, const char *host,
797: const char *original_host, char *line, const char *filename,
798: int linenum, int *activep, int flags, int depth)
799: {
1.193 djm 800: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
801: char **cpptr, fwdarg[256];
1.199 djm 802: u_int i, *uintptr, max_entries = 0;
1.252 djm 803: int r, oactive, negated, opcode, *intptr, value, value2, cmdline = 0;
1.164 dtucker 804: LogLevel *log_level_ptr;
1.201 dtucker 805: long long val64;
1.102 markus 806: size_t len;
1.220 millert 807: struct Forward fwd;
1.207 djm 808: const struct multistate *multistate_ptr;
1.208 djm 809: struct allowed_cname *cname;
1.252 djm 810: glob_t gl;
1.106 djm 811:
1.206 djm 812: if (activep == NULL) { /* We are processing a command line directive */
813: cmdline = 1;
814: activep = &cmdline;
815: }
816:
1.106 djm 817: /* Strip trailing whitespace */
1.233 djm 818: if ((len = strlen(line)) == 0)
819: return 0;
820: for (len--; len > 0; len--) {
1.106 djm 821: if (strchr(WHITESPACE, line[len]) == NULL)
822: break;
823: line[len] = '\0';
824: }
1.1 deraadt 825:
1.42 provos 826: s = line;
827: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 828: if ((keyword = strdelim(&s)) == NULL)
829: return 0;
1.42 provos 830: /* Ignore leading whitespace. */
831: if (*keyword == '\0')
1.43 markus 832: keyword = strdelim(&s);
1.56 deraadt 833: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 834: return 0;
1.199 djm 835: /* Match lowercase keyword */
1.207 djm 836: lowercase(keyword);
1.17 markus 837:
1.199 djm 838: opcode = parse_token(keyword, filename, linenum,
839: options->ignored_unknown);
1.17 markus 840:
841: switch (opcode) {
842: case oBadOption:
1.19 markus 843: /* don't panic, but count bad options */
844: return -1;
1.17 markus 845: /* NOTREACHED */
1.199 djm 846: case oIgnoredUnknownOption:
847: debug("%s line %d: Ignored unknown option \"%s\"",
848: filename, linenum, keyword);
849: return 0;
1.111 djm 850: case oConnectTimeout:
851: intptr = &options->connection_timeout;
1.127 markus 852: parse_time:
1.111 djm 853: arg = strdelim(&s);
854: if (!arg || *arg == '\0')
855: fatal("%s line %d: missing time value.",
856: filename, linenum);
1.221 djm 857: if (strcmp(arg, "none") == 0)
858: value = -1;
859: else if ((value = convtime(arg)) == -1)
1.111 djm 860: fatal("%s line %d: invalid time value.",
861: filename, linenum);
1.160 dtucker 862: if (*activep && *intptr == -1)
1.111 djm 863: *intptr = value;
864: break;
865:
1.17 markus 866: case oForwardAgent:
867: intptr = &options->forward_agent;
1.207 djm 868: parse_flag:
869: multistate_ptr = multistate_flag;
870: parse_multistate:
1.42 provos 871: arg = strdelim(&s);
1.40 ho 872: if (!arg || *arg == '\0')
1.207 djm 873: fatal("%s line %d: missing argument.",
874: filename, linenum);
875: value = -1;
876: for (i = 0; multistate_ptr[i].key != NULL; i++) {
877: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
878: value = multistate_ptr[i].value;
879: break;
880: }
881: }
882: if (value == -1)
883: fatal("%s line %d: unsupported option \"%s\".",
884: filename, linenum, arg);
1.17 markus 885: if (*activep && *intptr == -1)
886: *intptr = value;
887: break;
888:
889: case oForwardX11:
890: intptr = &options->forward_x11;
891: goto parse_flag;
892:
1.123 markus 893: case oForwardX11Trusted:
894: intptr = &options->forward_x11_trusted;
895: goto parse_flag;
1.221 djm 896:
1.186 djm 897: case oForwardX11Timeout:
898: intptr = &options->forward_x11_timeout;
899: goto parse_time;
1.123 markus 900:
1.17 markus 901: case oGatewayPorts:
1.220 millert 902: intptr = &options->fwd_opts.gateway_ports;
1.17 markus 903: goto parse_flag;
904:
1.153 markus 905: case oExitOnForwardFailure:
906: intptr = &options->exit_on_forward_failure;
907: goto parse_flag;
908:
1.17 markus 909: case oUsePrivilegedPort:
910: intptr = &options->use_privileged_port;
911: goto parse_flag;
912:
913: case oPasswordAuthentication:
914: intptr = &options->password_authentication;
915: goto parse_flag;
916:
1.48 markus 917: case oKbdInteractiveAuthentication:
918: intptr = &options->kbd_interactive_authentication;
919: goto parse_flag;
920:
921: case oKbdInteractiveDevices:
922: charptr = &options->kbd_interactive_devices;
923: goto parse_string;
924:
1.50 markus 925: case oPubkeyAuthentication:
926: intptr = &options->pubkey_authentication;
1.30 markus 927: goto parse_flag;
928:
1.17 markus 929: case oRSAAuthentication:
930: intptr = &options->rsa_authentication;
931: goto parse_flag;
932:
933: case oRhostsRSAAuthentication:
934: intptr = &options->rhosts_rsa_authentication;
935: goto parse_flag;
936:
1.72 markus 937: case oHostbasedAuthentication:
938: intptr = &options->hostbased_authentication;
939: goto parse_flag;
940:
1.59 markus 941: case oChallengeResponseAuthentication:
1.78 markus 942: intptr = &options->challenge_response_authentication;
1.17 markus 943: goto parse_flag;
1.108 jakob 944:
1.118 markus 945: case oGssAuthentication:
946: intptr = &options->gss_authentication;
947: goto parse_flag;
948:
949: case oGssDelegateCreds:
950: intptr = &options->gss_deleg_creds;
951: goto parse_flag;
952:
1.17 markus 953: case oBatchMode:
954: intptr = &options->batch_mode;
955: goto parse_flag;
956:
957: case oCheckHostIP:
958: intptr = &options->check_host_ip;
1.167 grunk 959: goto parse_flag;
1.17 markus 960:
1.107 jakob 961: case oVerifyHostKeyDNS:
962: intptr = &options->verify_host_key_dns;
1.207 djm 963: multistate_ptr = multistate_yesnoask;
964: goto parse_multistate;
1.107 jakob 965:
1.17 markus 966: case oStrictHostKeyChecking:
967: intptr = &options->strict_host_key_checking;
1.207 djm 968: multistate_ptr = multistate_yesnoask;
969: goto parse_multistate;
1.17 markus 970:
971: case oCompression:
972: intptr = &options->compression;
973: goto parse_flag;
974:
1.126 markus 975: case oTCPKeepAlive:
976: intptr = &options->tcp_keep_alive;
1.17 markus 977: goto parse_flag;
978:
1.91 markus 979: case oNoHostAuthenticationForLocalhost:
980: intptr = &options->no_host_authentication_for_localhost;
981: goto parse_flag;
982:
1.17 markus 983: case oNumberOfPasswordPrompts:
984: intptr = &options->number_of_password_prompts;
985: goto parse_int;
986:
987: case oCompressionLevel:
988: intptr = &options->compression_level;
989: goto parse_int;
990:
1.105 markus 991: case oRekeyLimit:
992: arg = strdelim(&s);
993: if (!arg || *arg == '\0')
1.198 dtucker 994: fatal("%.200s line %d: Missing argument.", filename,
995: linenum);
996: if (strcmp(arg, "default") == 0) {
997: val64 = 0;
998: } else {
1.200 dtucker 999: if (scan_scaled(arg, &val64) == -1)
1000: fatal("%.200s line %d: Bad number '%s': %s",
1001: filename, linenum, arg, strerror(errno));
1.198 dtucker 1002: if (val64 != 0 && val64 < 16)
1003: fatal("%.200s line %d: RekeyLimit too small",
1004: filename, linenum);
1.105 markus 1005: }
1.165 djm 1006: if (*activep && options->rekey_limit == -1)
1.249 dtucker 1007: options->rekey_limit = val64;
1.198 dtucker 1008: if (s != NULL) { /* optional rekey interval present */
1009: if (strcmp(s, "none") == 0) {
1010: (void)strdelim(&s); /* discard */
1011: break;
1012: }
1013: intptr = &options->rekey_interval;
1014: goto parse_time;
1015: }
1.105 markus 1016: break;
1017:
1.17 markus 1018: case oIdentityFile:
1.42 provos 1019: arg = strdelim(&s);
1.40 ho 1020: if (!arg || *arg == '\0')
1.17 markus 1021: fatal("%.200s line %d: Missing argument.", filename, linenum);
1022: if (*activep) {
1.50 markus 1023: intptr = &options->num_identity_files;
1.27 markus 1024: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 1025: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 1026: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.221 djm 1027: add_identity_file(options, NULL,
1028: arg, flags & SSHCONF_USERCONF);
1.17 markus 1029: }
1030: break;
1031:
1.241 djm 1032: case oCertificateFile:
1033: arg = strdelim(&s);
1034: if (!arg || *arg == '\0')
1035: fatal("%.200s line %d: Missing argument.",
1036: filename, linenum);
1037: if (*activep) {
1038: intptr = &options->num_certificate_files;
1039: if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
1040: fatal("%.200s line %d: Too many certificate "
1041: "files specified (max %d).",
1042: filename, linenum,
1043: SSH_MAX_CERTIFICATE_FILES);
1044: }
1045: add_certificate_file(options, arg,
1046: flags & SSHCONF_USERCONF);
1047: }
1048: break;
1049:
1.34 markus 1050: case oXAuthLocation:
1051: charptr=&options->xauth_location;
1052: goto parse_string;
1053:
1.17 markus 1054: case oUser:
1055: charptr = &options->user;
1056: parse_string:
1.42 provos 1057: arg = strdelim(&s);
1.40 ho 1058: if (!arg || *arg == '\0')
1.193 djm 1059: fatal("%.200s line %d: Missing argument.",
1060: filename, linenum);
1.17 markus 1061: if (*activep && *charptr == NULL)
1.38 provos 1062: *charptr = xstrdup(arg);
1.17 markus 1063: break;
1064:
1065: case oGlobalKnownHostsFile:
1.193 djm 1066: cpptr = (char **)&options->system_hostfiles;
1067: uintptr = &options->num_system_hostfiles;
1068: max_entries = SSH_MAX_HOSTS_FILES;
1069: parse_char_array:
1070: if (*activep && *uintptr == 0) {
1071: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1072: if ((*uintptr) >= max_entries)
1073: fatal("%s line %d: "
1074: "too many authorized keys files.",
1075: filename, linenum);
1076: cpptr[(*uintptr)++] = xstrdup(arg);
1077: }
1078: }
1079: return 0;
1.17 markus 1080:
1081: case oUserKnownHostsFile:
1.193 djm 1082: cpptr = (char **)&options->user_hostfiles;
1083: uintptr = &options->num_user_hostfiles;
1084: max_entries = SSH_MAX_HOSTS_FILES;
1085: goto parse_char_array;
1.27 markus 1086:
1.17 markus 1087: case oHostName:
1088: charptr = &options->hostname;
1089: goto parse_string;
1090:
1.52 markus 1091: case oHostKeyAlias:
1092: charptr = &options->host_key_alias;
1093: goto parse_string;
1094:
1.67 markus 1095: case oPreferredAuthentications:
1096: charptr = &options->preferred_authentications;
1097: goto parse_string;
1098:
1.77 markus 1099: case oBindAddress:
1100: charptr = &options->bind_address;
1101: goto parse_string;
1102:
1.183 markus 1103: case oPKCS11Provider:
1104: charptr = &options->pkcs11_provider;
1.86 markus 1105: goto parse_string;
1.85 jakob 1106:
1.17 markus 1107: case oProxyCommand:
1.144 reyk 1108: charptr = &options->proxy_command;
1109: parse_command:
1.113 markus 1110: if (s == NULL)
1111: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 1112: len = strspn(s, WHITESPACE "=");
1.17 markus 1113: if (*activep && *charptr == NULL)
1.102 markus 1114: *charptr = xstrdup(s + len);
1.17 markus 1115: return 0;
1116:
1117: case oPort:
1118: intptr = &options->port;
1119: parse_int:
1.42 provos 1120: arg = strdelim(&s);
1.40 ho 1121: if (!arg || *arg == '\0')
1.17 markus 1122: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1123: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 1124: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 1125:
1126: /* Octal, decimal, or hex format? */
1.38 provos 1127: value = strtol(arg, &endofnumber, 0);
1128: if (arg == endofnumber)
1.21 markus 1129: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 1130: if (*activep && *intptr == -1)
1131: *intptr = value;
1132: break;
1133:
1134: case oConnectionAttempts:
1135: intptr = &options->connection_attempts;
1136: goto parse_int;
1137:
1138: case oCipher:
1139: intptr = &options->cipher;
1.42 provos 1140: arg = strdelim(&s);
1.40 ho 1141: if (!arg || *arg == '\0')
1.32 markus 1142: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1143: value = cipher_number(arg);
1.17 markus 1144: if (value == -1)
1145: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 1146: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 1147: if (*activep && *intptr == -1)
1148: *intptr = value;
1149: break;
1150:
1.25 markus 1151: case oCiphers:
1.42 provos 1152: arg = strdelim(&s);
1.40 ho 1153: if (!arg || *arg == '\0')
1.32 markus 1154: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.239 djm 1155: if (!ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.31 markus 1156: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1157: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1158: if (*activep && options->ciphers == NULL)
1.38 provos 1159: options->ciphers = xstrdup(arg);
1.25 markus 1160: break;
1161:
1.62 markus 1162: case oMacs:
1163: arg = strdelim(&s);
1164: if (!arg || *arg == '\0')
1165: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.239 djm 1166: if (!mac_valid(*arg == '+' ? arg + 1 : arg))
1.62 markus 1167: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1168: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1169: if (*activep && options->macs == NULL)
1170: options->macs = xstrdup(arg);
1171: break;
1172:
1.189 djm 1173: case oKexAlgorithms:
1174: arg = strdelim(&s);
1175: if (!arg || *arg == '\0')
1176: fatal("%.200s line %d: Missing argument.",
1177: filename, linenum);
1.239 djm 1178: if (!kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.189 djm 1179: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1180: filename, linenum, arg ? arg : "<NONE>");
1181: if (*activep && options->kex_algorithms == NULL)
1182: options->kex_algorithms = xstrdup(arg);
1183: break;
1184:
1.76 markus 1185: case oHostKeyAlgorithms:
1.238 markus 1186: charptr = &options->hostkeyalgorithms;
1187: parse_keytypes:
1.76 markus 1188: arg = strdelim(&s);
1189: if (!arg || *arg == '\0')
1.238 markus 1190: fatal("%.200s line %d: Missing argument.",
1191: filename, linenum);
1.239 djm 1192: if (!sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.238 markus 1193: fatal("%s line %d: Bad key types '%s'.",
1194: filename, linenum, arg ? arg : "<NONE>");
1195: if (*activep && *charptr == NULL)
1196: *charptr = xstrdup(arg);
1.76 markus 1197: break;
1198:
1.25 markus 1199: case oProtocol:
1200: intptr = &options->protocol;
1.42 provos 1201: arg = strdelim(&s);
1.40 ho 1202: if (!arg || *arg == '\0')
1.32 markus 1203: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1204: value = proto_spec(arg);
1.25 markus 1205: if (value == SSH_PROTO_UNKNOWN)
1206: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 1207: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1208: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
1209: *intptr = value;
1210: break;
1211:
1.17 markus 1212: case oLogLevel:
1.164 dtucker 1213: log_level_ptr = &options->log_level;
1.42 provos 1214: arg = strdelim(&s);
1.38 provos 1215: value = log_level_number(arg);
1.95 markus 1216: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1217: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1218: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1219: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1220: *log_level_ptr = (LogLevel) value;
1.17 markus 1221: break;
1222:
1.88 stevesk 1223: case oLocalForward:
1.17 markus 1224: case oRemoteForward:
1.168 stevesk 1225: case oDynamicForward:
1.42 provos 1226: arg = strdelim(&s);
1.135 djm 1227: if (arg == NULL || *arg == '\0')
1.88 stevesk 1228: fatal("%.200s line %d: Missing port argument.",
1229: filename, linenum);
1.135 djm 1230:
1.168 stevesk 1231: if (opcode == oLocalForward ||
1232: opcode == oRemoteForward) {
1233: arg2 = strdelim(&s);
1234: if (arg2 == NULL || *arg2 == '\0')
1235: fatal("%.200s line %d: Missing target argument.",
1236: filename, linenum);
1.135 djm 1237:
1.168 stevesk 1238: /* construct a string for parse_forward */
1239: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1240: } else if (opcode == oDynamicForward) {
1241: strlcpy(fwdarg, arg, sizeof(fwdarg));
1242: }
1243:
1244: if (parse_forward(&fwd, fwdarg,
1.176 djm 1245: opcode == oDynamicForward ? 1 : 0,
1246: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1247: fatal("%.200s line %d: Bad forwarding specification.",
1248: filename, linenum);
1.135 djm 1249:
1.88 stevesk 1250: if (*activep) {
1.168 stevesk 1251: if (opcode == oLocalForward ||
1252: opcode == oDynamicForward)
1.135 djm 1253: add_local_forward(options, &fwd);
1.88 stevesk 1254: else if (opcode == oRemoteForward)
1.135 djm 1255: add_remote_forward(options, &fwd);
1.88 stevesk 1256: }
1.17 markus 1257: break;
1.71 markus 1258:
1.90 stevesk 1259: case oClearAllForwardings:
1260: intptr = &options->clear_forwardings;
1261: goto parse_flag;
1262:
1.17 markus 1263: case oHost:
1.206 djm 1264: if (cmdline)
1265: fatal("Host directive not supported as a command-line "
1266: "option");
1.17 markus 1267: *activep = 0;
1.191 djm 1268: arg2 = NULL;
1269: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.252 djm 1270: if ((flags & SSHCONF_NEVERMATCH) != 0)
1271: break;
1.191 djm 1272: negated = *arg == '!';
1273: if (negated)
1274: arg++;
1.38 provos 1275: if (match_pattern(host, arg)) {
1.191 djm 1276: if (negated) {
1277: debug("%.200s line %d: Skipping Host "
1278: "block because of negated match "
1279: "for %.100s", filename, linenum,
1280: arg);
1281: *activep = 0;
1282: break;
1283: }
1284: if (!*activep)
1285: arg2 = arg; /* logged below */
1.17 markus 1286: *activep = 1;
1287: }
1.191 djm 1288: }
1289: if (*activep)
1290: debug("%.200s line %d: Applying options for %.100s",
1291: filename, linenum, arg2);
1.42 provos 1292: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1293: return 0;
1294:
1.206 djm 1295: case oMatch:
1296: if (cmdline)
1297: fatal("Host directive not supported as a command-line "
1298: "option");
1.221 djm 1299: value = match_cfg_line(options, &s, pw, host, original_host,
1300: flags & SSHCONF_POSTCANON, filename, linenum);
1.206 djm 1301: if (value < 0)
1302: fatal("%.200s line %d: Bad Match condition", filename,
1303: linenum);
1.252 djm 1304: *activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
1.206 djm 1305: break;
1306:
1.17 markus 1307: case oEscapeChar:
1308: intptr = &options->escape_char;
1.42 provos 1309: arg = strdelim(&s);
1.40 ho 1310: if (!arg || *arg == '\0')
1.17 markus 1311: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.236 djm 1312: if (strcmp(arg, "none") == 0)
1313: value = SSH_ESCAPECHAR_NONE;
1314: else if (arg[1] == '\0')
1315: value = (u_char) arg[0];
1316: else if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1317: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1318: value = (u_char) arg[1] & 31;
1.17 markus 1319: else {
1320: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1321: filename, linenum);
1.17 markus 1322: /* NOTREACHED */
1323: value = 0; /* Avoid compiler warning. */
1324: }
1325: if (*activep && *intptr == -1)
1326: *intptr = value;
1.112 djm 1327: break;
1328:
1329: case oAddressFamily:
1.114 djm 1330: intptr = &options->address_family;
1.207 djm 1331: multistate_ptr = multistate_addressfamily;
1332: goto parse_multistate;
1.17 markus 1333:
1.101 markus 1334: case oEnableSSHKeysign:
1335: intptr = &options->enable_ssh_keysign;
1336: goto parse_flag;
1337:
1.128 markus 1338: case oIdentitiesOnly:
1339: intptr = &options->identities_only;
1340: goto parse_flag;
1341:
1.127 markus 1342: case oServerAliveInterval:
1343: intptr = &options->server_alive_interval;
1344: goto parse_time;
1345:
1346: case oServerAliveCountMax:
1347: intptr = &options->server_alive_count_max;
1348: goto parse_int;
1349:
1.130 djm 1350: case oSendEnv:
1351: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1352: if (strchr(arg, '=') != NULL)
1353: fatal("%s line %d: Invalid environment name.",
1354: filename, linenum);
1.137 djm 1355: if (!*activep)
1356: continue;
1.130 djm 1357: if (options->num_send_env >= MAX_SEND_ENV)
1358: fatal("%s line %d: too many send env.",
1359: filename, linenum);
1360: options->send_env[options->num_send_env++] =
1361: xstrdup(arg);
1362: }
1363: break;
1364:
1.132 djm 1365: case oControlPath:
1366: charptr = &options->control_path;
1367: goto parse_string;
1368:
1369: case oControlMaster:
1370: intptr = &options->control_master;
1.207 djm 1371: multistate_ptr = multistate_controlmaster;
1372: goto parse_multistate;
1.132 djm 1373:
1.187 djm 1374: case oControlPersist:
1375: /* no/false/yes/true, or a time spec */
1376: intptr = &options->control_persist;
1377: arg = strdelim(&s);
1378: if (!arg || *arg == '\0')
1379: fatal("%.200s line %d: Missing ControlPersist"
1380: " argument.", filename, linenum);
1381: value = 0;
1382: value2 = 0; /* timeout */
1383: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1384: value = 0;
1385: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1386: value = 1;
1387: else if ((value2 = convtime(arg)) >= 0)
1388: value = 1;
1389: else
1390: fatal("%.200s line %d: Bad ControlPersist argument.",
1391: filename, linenum);
1392: if (*activep && *intptr == -1) {
1393: *intptr = value;
1394: options->control_persist_timeout = value2;
1395: }
1396: break;
1397:
1.136 djm 1398: case oHashKnownHosts:
1399: intptr = &options->hash_known_hosts;
1400: goto parse_flag;
1401:
1.144 reyk 1402: case oTunnel:
1403: intptr = &options->tun_open;
1.207 djm 1404: multistate_ptr = multistate_tunnel;
1405: goto parse_multistate;
1.144 reyk 1406:
1407: case oTunnelDevice:
1408: arg = strdelim(&s);
1409: if (!arg || *arg == '\0')
1410: fatal("%.200s line %d: Missing argument.", filename, linenum);
1411: value = a2tun(arg, &value2);
1.145 reyk 1412: if (value == SSH_TUNID_ERR)
1.144 reyk 1413: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1414: if (*activep) {
1415: options->tun_local = value;
1416: options->tun_remote = value2;
1417: }
1418: break;
1419:
1420: case oLocalCommand:
1421: charptr = &options->local_command;
1422: goto parse_command;
1423:
1424: case oPermitLocalCommand:
1425: intptr = &options->permit_local_command;
1426: goto parse_flag;
1427:
1.167 grunk 1428: case oVisualHostKey:
1429: intptr = &options->visual_host_key;
1430: goto parse_flag;
1431:
1.252 djm 1432: case oInclude:
1433: if (cmdline)
1434: fatal("Include directive not supported as a "
1435: "command-line option");
1436: value = 0;
1437: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1438: /*
1439: * Ensure all paths are anchored. User configuration
1440: * files may begin with '~/' but system configurations
1441: * must not. If the path is relative, then treat it
1442: * as living in ~/.ssh for user configurations or
1443: * /etc/ssh for system ones.
1444: */
1445: if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0)
1446: fatal("%.200s line %d: bad include path %s.",
1447: filename, linenum, arg);
1448: if (*arg != '/' && *arg != '~') {
1449: xasprintf(&arg2, "%s/%s",
1450: (flags & SSHCONF_USERCONF) ?
1451: "~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
1452: } else
1453: arg2 = xstrdup(arg);
1454: memset(&gl, 0, sizeof(gl));
1455: r = glob(arg2, GLOB_TILDE, NULL, &gl);
1456: if (r == GLOB_NOMATCH) {
1457: debug("%.200s line %d: include %s matched no "
1458: "files",filename, linenum, arg2);
1459: continue;
1460: } else if (r != 0 || gl.gl_pathc < 0)
1461: fatal("%.200s line %d: glob failed for %s.",
1462: filename, linenum, arg2);
1463: free(arg2);
1464: oactive = *activep;
1465: for (i = 0; i < (u_int)gl.gl_pathc; i++) {
1466: debug3("%.200s line %d: Including file %s "
1467: "depth %d%s", filename, linenum,
1468: gl.gl_pathv[i], depth,
1469: oactive ? "" : " (parse only)");
1470: r = read_config_file_depth(gl.gl_pathv[i],
1471: pw, host, original_host, options,
1472: flags | SSHCONF_CHECKPERM |
1473: (oactive ? 0 : SSHCONF_NEVERMATCH),
1474: activep, depth + 1);
1475: /*
1476: * don't let Match in includes clobber the
1477: * containing file's Match state.
1478: */
1479: *activep = oactive;
1480: if (r != 1)
1481: value = -1;
1482: }
1483: globfree(&gl);
1484: }
1485: if (value != 0)
1486: return value;
1487: break;
1488:
1.190 djm 1489: case oIPQoS:
1490: arg = strdelim(&s);
1491: if ((value = parse_ipqos(arg)) == -1)
1492: fatal("%s line %d: Bad IPQoS value: %s",
1493: filename, linenum, arg);
1494: arg = strdelim(&s);
1495: if (arg == NULL)
1496: value2 = value;
1497: else if ((value2 = parse_ipqos(arg)) == -1)
1498: fatal("%s line %d: Bad IPQoS value: %s",
1499: filename, linenum, arg);
1500: if (*activep) {
1501: options->ip_qos_interactive = value;
1502: options->ip_qos_bulk = value2;
1503: }
1504: break;
1505:
1.192 djm 1506: case oRequestTTY:
1507: intptr = &options->request_tty;
1.207 djm 1508: multistate_ptr = multistate_requesttty;
1509: goto parse_multistate;
1.192 djm 1510:
1.199 djm 1511: case oIgnoreUnknown:
1512: charptr = &options->ignored_unknown;
1513: goto parse_string;
1514:
1.205 djm 1515: case oProxyUseFdpass:
1516: intptr = &options->proxy_use_fdpass;
1517: goto parse_flag;
1518:
1.208 djm 1519: case oCanonicalDomains:
1520: value = options->num_canonical_domains != 0;
1521: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1522: valid_domain(arg, filename, linenum);
1523: if (!*activep || value)
1524: continue;
1525: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1526: fatal("%s line %d: too many hostname suffixes.",
1527: filename, linenum);
1528: options->canonical_domains[
1529: options->num_canonical_domains++] = xstrdup(arg);
1530: }
1531: break;
1532:
1.209 djm 1533: case oCanonicalizePermittedCNAMEs:
1.208 djm 1534: value = options->num_permitted_cnames != 0;
1535: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1536: /* Either '*' for everything or 'list:list' */
1537: if (strcmp(arg, "*") == 0)
1538: arg2 = arg;
1539: else {
1540: lowercase(arg);
1541: if ((arg2 = strchr(arg, ':')) == NULL ||
1542: arg2[1] == '\0') {
1543: fatal("%s line %d: "
1544: "Invalid permitted CNAME \"%s\"",
1545: filename, linenum, arg);
1546: }
1547: *arg2 = '\0';
1548: arg2++;
1549: }
1550: if (!*activep || value)
1551: continue;
1552: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1553: fatal("%s line %d: too many permitted CNAMEs.",
1554: filename, linenum);
1555: cname = options->permitted_cnames +
1556: options->num_permitted_cnames++;
1557: cname->source_list = xstrdup(arg);
1558: cname->target_list = xstrdup(arg2);
1559: }
1560: break;
1561:
1.209 djm 1562: case oCanonicalizeHostname:
1563: intptr = &options->canonicalize_hostname;
1564: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1565: goto parse_multistate;
1566:
1.209 djm 1567: case oCanonicalizeMaxDots:
1568: intptr = &options->canonicalize_max_dots;
1.208 djm 1569: goto parse_int;
1570:
1.209 djm 1571: case oCanonicalizeFallbackLocal:
1572: intptr = &options->canonicalize_fallback_local;
1.208 djm 1573: goto parse_flag;
1574:
1.220 millert 1575: case oStreamLocalBindMask:
1576: arg = strdelim(&s);
1577: if (!arg || *arg == '\0')
1578: fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum);
1579: /* Parse mode in octal format */
1580: value = strtol(arg, &endofnumber, 8);
1581: if (arg == endofnumber || value < 0 || value > 0777)
1582: fatal("%.200s line %d: Bad mask.", filename, linenum);
1583: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1584: break;
1585:
1586: case oStreamLocalBindUnlink:
1587: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1588: goto parse_flag;
1589:
1.223 djm 1590: case oRevokedHostKeys:
1591: charptr = &options->revoked_host_keys;
1592: goto parse_string;
1593:
1.224 djm 1594: case oFingerprintHash:
1.225 djm 1595: intptr = &options->fingerprint_hash;
1.224 djm 1596: arg = strdelim(&s);
1597: if (!arg || *arg == '\0')
1598: fatal("%.200s line %d: Missing argument.",
1599: filename, linenum);
1600: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1601: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1602: filename, linenum, arg);
1.225 djm 1603: if (*activep && *intptr == -1)
1604: *intptr = value;
1.224 djm 1605: break;
1606:
1.229 djm 1607: case oUpdateHostkeys:
1608: intptr = &options->update_hostkeys;
1.232 djm 1609: multistate_ptr = multistate_yesnoask;
1610: goto parse_multistate;
1.229 djm 1611:
1.230 djm 1612: case oHostbasedKeyTypes:
1613: charptr = &options->hostbased_key_types;
1.238 markus 1614: goto parse_keytypes;
1615:
1616: case oPubkeyAcceptedKeyTypes:
1617: charptr = &options->pubkey_key_types;
1618: goto parse_keytypes;
1.230 djm 1619:
1.246 jcs 1620: case oAddKeysToAgent:
1621: intptr = &options->add_keys_to_agent;
1622: multistate_ptr = multistate_yesnoaskconfirm;
1623: goto parse_multistate;
1624:
1.253 ! markus 1625: case oIdentityAgent:
! 1626: charptr = &options->identity_agent;
! 1627: goto parse_string;
! 1628:
1.96 markus 1629: case oDeprecated:
1.98 markus 1630: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1631: filename, linenum, keyword);
1.98 markus 1632: return 0;
1.96 markus 1633:
1.110 jakob 1634: case oUnsupported:
1635: error("%s line %d: Unsupported option \"%s\"",
1636: filename, linenum, keyword);
1637: return 0;
1638:
1.17 markus 1639: default:
1.221 djm 1640: fatal("%s: Unimplemented opcode %d", __func__, opcode);
1.17 markus 1641: }
1642:
1643: /* Check that there is no garbage at end of line. */
1.57 djm 1644: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1645: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1646: filename, linenum, arg);
1.39 ho 1647: }
1.17 markus 1648: return 0;
1.1 deraadt 1649: }
1650:
1.19 markus 1651: /*
1652: * Reads the config file and modifies the options accordingly. Options
1653: * should already be initialized before this call. This never returns if
1.89 stevesk 1654: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1655: */
1.89 stevesk 1656: int
1.206 djm 1657: read_config_file(const char *filename, struct passwd *pw, const char *host,
1.221 djm 1658: const char *original_host, Options *options, int flags)
1.1 deraadt 1659: {
1.252 djm 1660: int active = 1;
1661:
1662: return read_config_file_depth(filename, pw, host, original_host,
1663: options, flags, &active, 0);
1664: }
1665:
1666: #define READCONF_MAX_DEPTH 16
1667: static int
1668: read_config_file_depth(const char *filename, struct passwd *pw,
1669: const char *host, const char *original_host, Options *options,
1670: int flags, int *activep, int depth)
1671: {
1.17 markus 1672: FILE *f;
1673: char line[1024];
1.252 djm 1674: int linenum;
1.17 markus 1675: int bad_options = 0;
1676:
1.252 djm 1677: if (depth < 0 || depth > READCONF_MAX_DEPTH)
1678: fatal("Too many recursive configuration includes");
1679:
1.129 djm 1680: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1681: return 0;
1.129 djm 1682:
1.196 dtucker 1683: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1684: struct stat sb;
1.134 deraadt 1685:
1.131 dtucker 1686: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1687: fatal("fstat %s: %s", filename, strerror(errno));
1688: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1689: (sb.st_mode & 022) != 0))
1.129 djm 1690: fatal("Bad owner or permissions on %s", filename);
1691: }
1.17 markus 1692:
1693: debug("Reading configuration data %.200s", filename);
1694:
1.19 markus 1695: /*
1696: * Mark that we are now processing the options. This flag is turned
1697: * on/off by Host specifications.
1698: */
1.17 markus 1699: linenum = 0;
1700: while (fgets(line, sizeof(line), f)) {
1701: /* Update line number counter. */
1702: linenum++;
1.252 djm 1703: if (process_config_line_depth(options, pw, host, original_host,
1704: line, filename, linenum, activep, flags, depth) != 0)
1.17 markus 1705: bad_options++;
1706: }
1707: fclose(f);
1708: if (bad_options > 0)
1.64 millert 1709: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1710: filename, bad_options);
1.89 stevesk 1711: return 1;
1.1 deraadt 1712: }
1713:
1.218 djm 1714: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1715: int
1716: option_clear_or_none(const char *o)
1717: {
1718: return o == NULL || strcasecmp(o, "none") == 0;
1719: }
1720:
1.19 markus 1721: /*
1722: * Initializes options to special values that indicate that they have not yet
1723: * been set. Read_config_file will only set options with this value. Options
1724: * are processed in the following order: command line, user config file,
1725: * system config file. Last, fill_default_options is called.
1726: */
1.1 deraadt 1727:
1.26 markus 1728: void
1.17 markus 1729: initialize_options(Options * options)
1.1 deraadt 1730: {
1.17 markus 1731: memset(options, 'X', sizeof(*options));
1732: options->forward_agent = -1;
1733: options->forward_x11 = -1;
1.123 markus 1734: options->forward_x11_trusted = -1;
1.186 djm 1735: options->forward_x11_timeout = -1;
1.153 markus 1736: options->exit_on_forward_failure = -1;
1.34 markus 1737: options->xauth_location = NULL;
1.220 millert 1738: options->fwd_opts.gateway_ports = -1;
1739: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
1740: options->fwd_opts.streamlocal_bind_unlink = -1;
1.17 markus 1741: options->use_privileged_port = -1;
1742: options->rsa_authentication = -1;
1.50 markus 1743: options->pubkey_authentication = -1;
1.78 markus 1744: options->challenge_response_authentication = -1;
1.118 markus 1745: options->gss_authentication = -1;
1746: options->gss_deleg_creds = -1;
1.17 markus 1747: options->password_authentication = -1;
1.48 markus 1748: options->kbd_interactive_authentication = -1;
1749: options->kbd_interactive_devices = NULL;
1.17 markus 1750: options->rhosts_rsa_authentication = -1;
1.72 markus 1751: options->hostbased_authentication = -1;
1.17 markus 1752: options->batch_mode = -1;
1753: options->check_host_ip = -1;
1754: options->strict_host_key_checking = -1;
1755: options->compression = -1;
1.126 markus 1756: options->tcp_keep_alive = -1;
1.17 markus 1757: options->compression_level = -1;
1758: options->port = -1;
1.114 djm 1759: options->address_family = -1;
1.17 markus 1760: options->connection_attempts = -1;
1.111 djm 1761: options->connection_timeout = -1;
1.17 markus 1762: options->number_of_password_prompts = -1;
1763: options->cipher = -1;
1.25 markus 1764: options->ciphers = NULL;
1.62 markus 1765: options->macs = NULL;
1.189 djm 1766: options->kex_algorithms = NULL;
1.76 markus 1767: options->hostkeyalgorithms = NULL;
1.25 markus 1768: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1769: options->num_identity_files = 0;
1.241 djm 1770: options->num_certificate_files = 0;
1.17 markus 1771: options->hostname = NULL;
1.52 markus 1772: options->host_key_alias = NULL;
1.17 markus 1773: options->proxy_command = NULL;
1774: options->user = NULL;
1775: options->escape_char = -1;
1.193 djm 1776: options->num_system_hostfiles = 0;
1777: options->num_user_hostfiles = 0;
1.185 djm 1778: options->local_forwards = NULL;
1.17 markus 1779: options->num_local_forwards = 0;
1.185 djm 1780: options->remote_forwards = NULL;
1.17 markus 1781: options->num_remote_forwards = 0;
1.90 stevesk 1782: options->clear_forwardings = -1;
1.95 markus 1783: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1784: options->preferred_authentications = NULL;
1.77 markus 1785: options->bind_address = NULL;
1.183 markus 1786: options->pkcs11_provider = NULL;
1.101 markus 1787: options->enable_ssh_keysign = - 1;
1.91 markus 1788: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1789: options->identities_only = - 1;
1.105 markus 1790: options->rekey_limit = - 1;
1.198 dtucker 1791: options->rekey_interval = -1;
1.107 jakob 1792: options->verify_host_key_dns = -1;
1.127 markus 1793: options->server_alive_interval = -1;
1794: options->server_alive_count_max = -1;
1.130 djm 1795: options->num_send_env = 0;
1.132 djm 1796: options->control_path = NULL;
1797: options->control_master = -1;
1.187 djm 1798: options->control_persist = -1;
1799: options->control_persist_timeout = 0;
1.136 djm 1800: options->hash_known_hosts = -1;
1.144 reyk 1801: options->tun_open = -1;
1802: options->tun_local = -1;
1803: options->tun_remote = -1;
1804: options->local_command = NULL;
1805: options->permit_local_command = -1;
1.246 jcs 1806: options->add_keys_to_agent = -1;
1.253 ! markus 1807: options->identity_agent = NULL;
1.167 grunk 1808: options->visual_host_key = -1;
1.190 djm 1809: options->ip_qos_interactive = -1;
1810: options->ip_qos_bulk = -1;
1.192 djm 1811: options->request_tty = -1;
1.205 djm 1812: options->proxy_use_fdpass = -1;
1.199 djm 1813: options->ignored_unknown = NULL;
1.208 djm 1814: options->num_canonical_domains = 0;
1815: options->num_permitted_cnames = 0;
1.209 djm 1816: options->canonicalize_max_dots = -1;
1817: options->canonicalize_fallback_local = -1;
1818: options->canonicalize_hostname = -1;
1.223 djm 1819: options->revoked_host_keys = NULL;
1.224 djm 1820: options->fingerprint_hash = -1;
1.229 djm 1821: options->update_hostkeys = -1;
1.230 djm 1822: options->hostbased_key_types = NULL;
1.238 markus 1823: options->pubkey_key_types = NULL;
1.1 deraadt 1824: }
1825:
1.19 markus 1826: /*
1.218 djm 1827: * A petite version of fill_default_options() that just fills the options
1828: * needed for hostname canonicalization to proceed.
1829: */
1830: void
1831: fill_default_options_for_canonicalization(Options *options)
1832: {
1833: if (options->canonicalize_max_dots == -1)
1834: options->canonicalize_max_dots = 1;
1835: if (options->canonicalize_fallback_local == -1)
1836: options->canonicalize_fallback_local = 1;
1837: if (options->canonicalize_hostname == -1)
1838: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1839: }
1840:
1841: /*
1.19 markus 1842: * Called after processing other sources of option data, this fills those
1843: * options for which no value has been specified with their default values.
1844: */
1.26 markus 1845: void
1.17 markus 1846: fill_default_options(Options * options)
1.1 deraadt 1847: {
1.17 markus 1848: if (options->forward_agent == -1)
1.33 markus 1849: options->forward_agent = 0;
1.17 markus 1850: if (options->forward_x11 == -1)
1.23 markus 1851: options->forward_x11 = 0;
1.123 markus 1852: if (options->forward_x11_trusted == -1)
1853: options->forward_x11_trusted = 0;
1.186 djm 1854: if (options->forward_x11_timeout == -1)
1855: options->forward_x11_timeout = 1200;
1.153 markus 1856: if (options->exit_on_forward_failure == -1)
1857: options->exit_on_forward_failure = 0;
1.34 markus 1858: if (options->xauth_location == NULL)
1.80 markus 1859: options->xauth_location = _PATH_XAUTH;
1.220 millert 1860: if (options->fwd_opts.gateway_ports == -1)
1861: options->fwd_opts.gateway_ports = 0;
1862: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
1863: options->fwd_opts.streamlocal_bind_mask = 0177;
1864: if (options->fwd_opts.streamlocal_bind_unlink == -1)
1865: options->fwd_opts.streamlocal_bind_unlink = 0;
1.17 markus 1866: if (options->use_privileged_port == -1)
1.65 markus 1867: options->use_privileged_port = 0;
1.17 markus 1868: if (options->rsa_authentication == -1)
1869: options->rsa_authentication = 1;
1.50 markus 1870: if (options->pubkey_authentication == -1)
1871: options->pubkey_authentication = 1;
1.78 markus 1872: if (options->challenge_response_authentication == -1)
1.83 markus 1873: options->challenge_response_authentication = 1;
1.118 markus 1874: if (options->gss_authentication == -1)
1.122 markus 1875: options->gss_authentication = 0;
1.118 markus 1876: if (options->gss_deleg_creds == -1)
1877: options->gss_deleg_creds = 0;
1.17 markus 1878: if (options->password_authentication == -1)
1879: options->password_authentication = 1;
1.48 markus 1880: if (options->kbd_interactive_authentication == -1)
1.59 markus 1881: options->kbd_interactive_authentication = 1;
1.17 markus 1882: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1883: options->rhosts_rsa_authentication = 0;
1.72 markus 1884: if (options->hostbased_authentication == -1)
1885: options->hostbased_authentication = 0;
1.17 markus 1886: if (options->batch_mode == -1)
1887: options->batch_mode = 0;
1888: if (options->check_host_ip == -1)
1889: options->check_host_ip = 1;
1890: if (options->strict_host_key_checking == -1)
1891: options->strict_host_key_checking = 2; /* 2 is default */
1892: if (options->compression == -1)
1893: options->compression = 0;
1.126 markus 1894: if (options->tcp_keep_alive == -1)
1895: options->tcp_keep_alive = 1;
1.17 markus 1896: if (options->compression_level == -1)
1897: options->compression_level = 6;
1898: if (options->port == -1)
1899: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1900: if (options->address_family == -1)
1901: options->address_family = AF_UNSPEC;
1.17 markus 1902: if (options->connection_attempts == -1)
1.84 markus 1903: options->connection_attempts = 1;
1.17 markus 1904: if (options->number_of_password_prompts == -1)
1905: options->number_of_password_prompts = 3;
1906: /* Selected in ssh_login(). */
1907: if (options->cipher == -1)
1908: options->cipher = SSH_CIPHER_NOT_SET;
1.76 markus 1909: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1910: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1911: options->protocol = SSH_PROTO_2;
1.246 jcs 1912: if (options->add_keys_to_agent == -1)
1913: options->add_keys_to_agent = 0;
1.17 markus 1914: if (options->num_identity_files == 0) {
1.50 markus 1915: if (options->protocol & SSH_PROTO_1) {
1.195 dtucker 1916: add_identity_file(options, "~/",
1917: _PATH_SSH_CLIENT_IDENTITY, 0);
1.50 markus 1918: }
1919: if (options->protocol & SSH_PROTO_2) {
1.195 dtucker 1920: add_identity_file(options, "~/",
1921: _PATH_SSH_CLIENT_ID_RSA, 0);
1922: add_identity_file(options, "~/",
1923: _PATH_SSH_CLIENT_ID_DSA, 0);
1924: add_identity_file(options, "~/",
1925: _PATH_SSH_CLIENT_ID_ECDSA, 0);
1.215 markus 1926: add_identity_file(options, "~/",
1927: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.50 markus 1928: }
1.27 markus 1929: }
1.17 markus 1930: if (options->escape_char == -1)
1931: options->escape_char = '~';
1.193 djm 1932: if (options->num_system_hostfiles == 0) {
1933: options->system_hostfiles[options->num_system_hostfiles++] =
1934: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1935: options->system_hostfiles[options->num_system_hostfiles++] =
1936: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1937: }
1938: if (options->num_user_hostfiles == 0) {
1939: options->user_hostfiles[options->num_user_hostfiles++] =
1940: xstrdup(_PATH_SSH_USER_HOSTFILE);
1941: options->user_hostfiles[options->num_user_hostfiles++] =
1942: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1943: }
1.95 markus 1944: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1945: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1946: if (options->clear_forwardings == 1)
1947: clear_forwardings(options);
1.91 markus 1948: if (options->no_host_authentication_for_localhost == - 1)
1949: options->no_host_authentication_for_localhost = 0;
1.128 markus 1950: if (options->identities_only == -1)
1951: options->identities_only = 0;
1.101 markus 1952: if (options->enable_ssh_keysign == -1)
1953: options->enable_ssh_keysign = 0;
1.105 markus 1954: if (options->rekey_limit == -1)
1955: options->rekey_limit = 0;
1.198 dtucker 1956: if (options->rekey_interval == -1)
1957: options->rekey_interval = 0;
1.107 jakob 1958: if (options->verify_host_key_dns == -1)
1959: options->verify_host_key_dns = 0;
1.127 markus 1960: if (options->server_alive_interval == -1)
1961: options->server_alive_interval = 0;
1962: if (options->server_alive_count_max == -1)
1963: options->server_alive_count_max = 3;
1.132 djm 1964: if (options->control_master == -1)
1965: options->control_master = 0;
1.187 djm 1966: if (options->control_persist == -1) {
1967: options->control_persist = 0;
1968: options->control_persist_timeout = 0;
1969: }
1.136 djm 1970: if (options->hash_known_hosts == -1)
1971: options->hash_known_hosts = 0;
1.144 reyk 1972: if (options->tun_open == -1)
1.145 reyk 1973: options->tun_open = SSH_TUNMODE_NO;
1974: if (options->tun_local == -1)
1975: options->tun_local = SSH_TUNID_ANY;
1976: if (options->tun_remote == -1)
1977: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1978: if (options->permit_local_command == -1)
1979: options->permit_local_command = 0;
1.167 grunk 1980: if (options->visual_host_key == -1)
1981: options->visual_host_key = 0;
1.190 djm 1982: if (options->ip_qos_interactive == -1)
1983: options->ip_qos_interactive = IPTOS_LOWDELAY;
1984: if (options->ip_qos_bulk == -1)
1985: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1986: if (options->request_tty == -1)
1987: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 1988: if (options->proxy_use_fdpass == -1)
1989: options->proxy_use_fdpass = 0;
1.209 djm 1990: if (options->canonicalize_max_dots == -1)
1991: options->canonicalize_max_dots = 1;
1992: if (options->canonicalize_fallback_local == -1)
1993: options->canonicalize_fallback_local = 1;
1994: if (options->canonicalize_hostname == -1)
1995: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.224 djm 1996: if (options->fingerprint_hash == -1)
1997: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.229 djm 1998: if (options->update_hostkeys == -1)
1.231 djm 1999: options->update_hostkeys = 0;
1.239 djm 2000: if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 ||
2001: kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 ||
2002: kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 ||
2003: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2004: &options->hostbased_key_types) != 0 ||
2005: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2006: &options->pubkey_key_types) != 0)
2007: fatal("%s: kex_assemble_names failed", __func__);
1.224 djm 2008:
1.207 djm 2009: #define CLEAR_ON_NONE(v) \
2010: do { \
1.218 djm 2011: if (option_clear_or_none(v)) { \
1.207 djm 2012: free(v); \
2013: v = NULL; \
2014: } \
2015: } while(0)
2016: CLEAR_ON_NONE(options->local_command);
2017: CLEAR_ON_NONE(options->proxy_command);
2018: CLEAR_ON_NONE(options->control_path);
1.223 djm 2019: CLEAR_ON_NONE(options->revoked_host_keys);
1.17 markus 2020: /* options->user will be set in the main program if appropriate */
2021: /* options->hostname will be set in the main program if appropriate */
1.52 markus 2022: /* options->host_key_alias should not be set by default */
1.67 markus 2023: /* options->preferred_authentications will be set in ssh */
1.135 djm 2024: }
2025:
1.220 millert 2026: struct fwdarg {
2027: char *arg;
2028: int ispath;
2029: };
2030:
2031: /*
2032: * parse_fwd_field
2033: * parses the next field in a port forwarding specification.
2034: * sets fwd to the parsed field and advances p past the colon
2035: * or sets it to NULL at end of string.
2036: * returns 0 on success, else non-zero.
2037: */
2038: static int
2039: parse_fwd_field(char **p, struct fwdarg *fwd)
2040: {
2041: char *ep, *cp = *p;
2042: int ispath = 0;
2043:
2044: if (*cp == '\0') {
2045: *p = NULL;
2046: return -1; /* end of string */
2047: }
2048:
2049: /*
2050: * A field escaped with square brackets is used literally.
2051: * XXX - allow ']' to be escaped via backslash?
2052: */
2053: if (*cp == '[') {
2054: /* find matching ']' */
2055: for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
2056: if (*ep == '/')
2057: ispath = 1;
2058: }
2059: /* no matching ']' or not at end of field. */
2060: if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
2061: return -1;
2062: /* NUL terminate the field and advance p past the colon */
2063: *ep++ = '\0';
2064: if (*ep != '\0')
2065: *ep++ = '\0';
2066: fwd->arg = cp + 1;
2067: fwd->ispath = ispath;
2068: *p = ep;
2069: return 0;
2070: }
2071:
2072: for (cp = *p; *cp != '\0'; cp++) {
2073: switch (*cp) {
2074: case '\\':
2075: memmove(cp, cp + 1, strlen(cp + 1) + 1);
1.237 djm 2076: if (*cp == '\0')
2077: return -1;
1.220 millert 2078: break;
2079: case '/':
2080: ispath = 1;
2081: break;
2082: case ':':
2083: *cp++ = '\0';
2084: goto done;
2085: }
2086: }
2087: done:
2088: fwd->arg = *p;
2089: fwd->ispath = ispath;
2090: *p = cp;
2091: return 0;
2092: }
2093:
1.135 djm 2094: /*
2095: * parse_forward
2096: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 2097: * dynamicfwd == 0
1.220 millert 2098: * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
2099: * listenpath:connectpath
1.168 stevesk 2100: * dynamicfwd == 1
2101: * [listenhost:]listenport
1.135 djm 2102: * returns number of arguments parsed or zero on error
2103: */
2104: int
1.220 millert 2105: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 2106: {
1.220 millert 2107: struct fwdarg fwdargs[4];
2108: char *p, *cp;
1.135 djm 2109: int i;
2110:
1.220 millert 2111: memset(fwd, 0, sizeof(*fwd));
2112: memset(fwdargs, 0, sizeof(fwdargs));
1.135 djm 2113:
2114: cp = p = xstrdup(fwdspec);
2115:
2116: /* skip leading spaces */
1.214 deraadt 2117: while (isspace((u_char)*cp))
1.135 djm 2118: cp++;
2119:
1.220 millert 2120: for (i = 0; i < 4; ++i) {
2121: if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.135 djm 2122: break;
1.220 millert 2123: }
1.135 djm 2124:
1.170 stevesk 2125: /* Check for trailing garbage */
1.220 millert 2126: if (cp != NULL && *cp != '\0') {
1.135 djm 2127: i = 0; /* failure */
1.220 millert 2128: }
1.135 djm 2129:
2130: switch (i) {
1.168 stevesk 2131: case 1:
1.220 millert 2132: if (fwdargs[0].ispath) {
2133: fwd->listen_path = xstrdup(fwdargs[0].arg);
2134: fwd->listen_port = PORT_STREAMLOCAL;
2135: } else {
2136: fwd->listen_host = NULL;
2137: fwd->listen_port = a2port(fwdargs[0].arg);
2138: }
1.168 stevesk 2139: fwd->connect_host = xstrdup("socks");
2140: break;
2141:
2142: case 2:
1.220 millert 2143: if (fwdargs[0].ispath && fwdargs[1].ispath) {
2144: fwd->listen_path = xstrdup(fwdargs[0].arg);
2145: fwd->listen_port = PORT_STREAMLOCAL;
2146: fwd->connect_path = xstrdup(fwdargs[1].arg);
2147: fwd->connect_port = PORT_STREAMLOCAL;
2148: } else if (fwdargs[1].ispath) {
2149: fwd->listen_host = NULL;
2150: fwd->listen_port = a2port(fwdargs[0].arg);
2151: fwd->connect_path = xstrdup(fwdargs[1].arg);
2152: fwd->connect_port = PORT_STREAMLOCAL;
2153: } else {
2154: fwd->listen_host = xstrdup(fwdargs[0].arg);
2155: fwd->listen_port = a2port(fwdargs[1].arg);
2156: fwd->connect_host = xstrdup("socks");
2157: }
1.168 stevesk 2158: break;
2159:
1.135 djm 2160: case 3:
1.220 millert 2161: if (fwdargs[0].ispath) {
2162: fwd->listen_path = xstrdup(fwdargs[0].arg);
2163: fwd->listen_port = PORT_STREAMLOCAL;
2164: fwd->connect_host = xstrdup(fwdargs[1].arg);
2165: fwd->connect_port = a2port(fwdargs[2].arg);
2166: } else if (fwdargs[2].ispath) {
2167: fwd->listen_host = xstrdup(fwdargs[0].arg);
2168: fwd->listen_port = a2port(fwdargs[1].arg);
2169: fwd->connect_path = xstrdup(fwdargs[2].arg);
2170: fwd->connect_port = PORT_STREAMLOCAL;
2171: } else {
2172: fwd->listen_host = NULL;
2173: fwd->listen_port = a2port(fwdargs[0].arg);
2174: fwd->connect_host = xstrdup(fwdargs[1].arg);
2175: fwd->connect_port = a2port(fwdargs[2].arg);
2176: }
1.135 djm 2177: break;
2178:
2179: case 4:
1.220 millert 2180: fwd->listen_host = xstrdup(fwdargs[0].arg);
2181: fwd->listen_port = a2port(fwdargs[1].arg);
2182: fwd->connect_host = xstrdup(fwdargs[2].arg);
2183: fwd->connect_port = a2port(fwdargs[3].arg);
1.135 djm 2184: break;
2185: default:
2186: i = 0; /* failure */
2187: }
2188:
1.202 djm 2189: free(p);
1.135 djm 2190:
1.168 stevesk 2191: if (dynamicfwd) {
2192: if (!(i == 1 || i == 2))
2193: goto fail_free;
2194: } else {
1.220 millert 2195: if (!(i == 3 || i == 4)) {
2196: if (fwd->connect_path == NULL &&
2197: fwd->listen_path == NULL)
2198: goto fail_free;
2199: }
2200: if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.168 stevesk 2201: goto fail_free;
2202: }
2203:
1.220 millert 2204: if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
2205: (!remotefwd && fwd->listen_port == 0))
1.135 djm 2206: goto fail_free;
2207: if (fwd->connect_host != NULL &&
2208: strlen(fwd->connect_host) >= NI_MAXHOST)
2209: goto fail_free;
1.220 millert 2210: /* XXX - if connecting to a remote socket, max sun len may not match this host */
2211: if (fwd->connect_path != NULL &&
2212: strlen(fwd->connect_path) >= PATH_MAX_SUN)
2213: goto fail_free;
1.176 djm 2214: if (fwd->listen_host != NULL &&
2215: strlen(fwd->listen_host) >= NI_MAXHOST)
2216: goto fail_free;
1.220 millert 2217: if (fwd->listen_path != NULL &&
2218: strlen(fwd->listen_path) >= PATH_MAX_SUN)
2219: goto fail_free;
1.135 djm 2220:
2221: return (i);
2222:
2223: fail_free:
1.202 djm 2224: free(fwd->connect_host);
2225: fwd->connect_host = NULL;
1.220 millert 2226: free(fwd->connect_path);
2227: fwd->connect_path = NULL;
1.202 djm 2228: free(fwd->listen_host);
2229: fwd->listen_host = NULL;
1.220 millert 2230: free(fwd->listen_path);
2231: fwd->listen_path = NULL;
1.135 djm 2232: return (0);
1.221 djm 2233: }
2234:
2235: /* XXX the following is a near-vebatim copy from servconf.c; refactor */
2236: static const char *
2237: fmt_multistate_int(int val, const struct multistate *m)
2238: {
2239: u_int i;
2240:
2241: for (i = 0; m[i].key != NULL; i++) {
2242: if (m[i].value == val)
2243: return m[i].key;
2244: }
2245: return "UNKNOWN";
2246: }
2247:
2248: static const char *
2249: fmt_intarg(OpCodes code, int val)
2250: {
2251: if (val == -1)
2252: return "unset";
2253: switch (code) {
2254: case oAddressFamily:
2255: return fmt_multistate_int(val, multistate_addressfamily);
2256: case oVerifyHostKeyDNS:
2257: case oStrictHostKeyChecking:
1.232 djm 2258: case oUpdateHostkeys:
1.221 djm 2259: return fmt_multistate_int(val, multistate_yesnoask);
2260: case oControlMaster:
2261: return fmt_multistate_int(val, multistate_controlmaster);
2262: case oTunnel:
2263: return fmt_multistate_int(val, multistate_tunnel);
2264: case oRequestTTY:
2265: return fmt_multistate_int(val, multistate_requesttty);
2266: case oCanonicalizeHostname:
2267: return fmt_multistate_int(val, multistate_canonicalizehostname);
1.224 djm 2268: case oFingerprintHash:
2269: return ssh_digest_alg_name(val);
1.221 djm 2270: case oProtocol:
2271: switch (val) {
2272: case SSH_PROTO_1:
2273: return "1";
2274: case SSH_PROTO_2:
2275: return "2";
2276: case (SSH_PROTO_1|SSH_PROTO_2):
2277: return "2,1";
2278: default:
2279: return "UNKNOWN";
2280: }
2281: default:
2282: switch (val) {
2283: case 0:
2284: return "no";
2285: case 1:
2286: return "yes";
2287: default:
2288: return "UNKNOWN";
2289: }
2290: }
2291: }
2292:
2293: static const char *
2294: lookup_opcode_name(OpCodes code)
2295: {
2296: u_int i;
2297:
2298: for (i = 0; keywords[i].name != NULL; i++)
2299: if (keywords[i].opcode == code)
2300: return(keywords[i].name);
2301: return "UNKNOWN";
2302: }
2303:
2304: static void
2305: dump_cfg_int(OpCodes code, int val)
2306: {
2307: printf("%s %d\n", lookup_opcode_name(code), val);
2308: }
2309:
2310: static void
2311: dump_cfg_fmtint(OpCodes code, int val)
2312: {
2313: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2314: }
2315:
2316: static void
2317: dump_cfg_string(OpCodes code, const char *val)
2318: {
2319: if (val == NULL)
2320: return;
2321: printf("%s %s\n", lookup_opcode_name(code), val);
2322: }
2323:
2324: static void
2325: dump_cfg_strarray(OpCodes code, u_int count, char **vals)
2326: {
2327: u_int i;
2328:
2329: for (i = 0; i < count; i++)
2330: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2331: }
2332:
2333: static void
2334: dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
2335: {
2336: u_int i;
2337:
2338: printf("%s", lookup_opcode_name(code));
2339: for (i = 0; i < count; i++)
2340: printf(" %s", vals[i]);
2341: printf("\n");
2342: }
2343:
2344: static void
2345: dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
2346: {
2347: const struct Forward *fwd;
2348: u_int i;
2349:
2350: /* oDynamicForward */
2351: for (i = 0; i < count; i++) {
2352: fwd = &fwds[i];
2353: if (code == oDynamicForward &&
2354: strcmp(fwd->connect_host, "socks") != 0)
2355: continue;
2356: if (code == oLocalForward &&
2357: strcmp(fwd->connect_host, "socks") == 0)
2358: continue;
2359: printf("%s", lookup_opcode_name(code));
2360: if (fwd->listen_port == PORT_STREAMLOCAL)
2361: printf(" %s", fwd->listen_path);
2362: else if (fwd->listen_host == NULL)
2363: printf(" %d", fwd->listen_port);
2364: else {
2365: printf(" [%s]:%d",
2366: fwd->listen_host, fwd->listen_port);
2367: }
2368: if (code != oDynamicForward) {
2369: if (fwd->connect_port == PORT_STREAMLOCAL)
2370: printf(" %s", fwd->connect_path);
2371: else if (fwd->connect_host == NULL)
2372: printf(" %d", fwd->connect_port);
2373: else {
2374: printf(" [%s]:%d",
2375: fwd->connect_host, fwd->connect_port);
2376: }
2377: }
2378: printf("\n");
2379: }
2380: }
2381:
2382: void
2383: dump_client_config(Options *o, const char *host)
2384: {
2385: int i;
2386: char vbuf[5];
2387:
1.240 djm 2388: /* This is normally prepared in ssh_kex2 */
2389: if (kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->hostkeyalgorithms) != 0)
2390: fatal("%s: kex_assemble_names failed", __func__);
2391:
1.221 djm 2392: /* Most interesting options first: user, host, port */
2393: dump_cfg_string(oUser, o->user);
2394: dump_cfg_string(oHostName, host);
2395: dump_cfg_int(oPort, o->port);
2396:
2397: /* Flag options */
2398: dump_cfg_fmtint(oAddressFamily, o->address_family);
2399: dump_cfg_fmtint(oBatchMode, o->batch_mode);
2400: dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
2401: dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
2402: dump_cfg_fmtint(oChallengeResponseAuthentication, o->challenge_response_authentication);
2403: dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
2404: dump_cfg_fmtint(oCompression, o->compression);
2405: dump_cfg_fmtint(oControlMaster, o->control_master);
2406: dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
2407: dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
1.224 djm 2408: dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
1.221 djm 2409: dump_cfg_fmtint(oForwardAgent, o->forward_agent);
2410: dump_cfg_fmtint(oForwardX11, o->forward_x11);
2411: dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
2412: dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
2413: #ifdef GSSAPI
2414: dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
2415: dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
2416: #endif /* GSSAPI */
2417: dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
2418: dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
2419: dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
2420: dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
2421: dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
2422: dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
2423: dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
2424: dump_cfg_fmtint(oProtocol, o->protocol);
2425: dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
2426: dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
2427: dump_cfg_fmtint(oRequestTTY, o->request_tty);
2428: dump_cfg_fmtint(oRhostsRSAAuthentication, o->rhosts_rsa_authentication);
2429: dump_cfg_fmtint(oRSAAuthentication, o->rsa_authentication);
2430: dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
2431: dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
2432: dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
2433: dump_cfg_fmtint(oTunnel, o->tun_open);
2434: dump_cfg_fmtint(oUsePrivilegedPort, o->use_privileged_port);
2435: dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
2436: dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
1.229 djm 2437: dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
1.221 djm 2438:
2439: /* Integer options */
2440: dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
2441: dump_cfg_int(oCompressionLevel, o->compression_level);
2442: dump_cfg_int(oConnectionAttempts, o->connection_attempts);
2443: dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
2444: dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
2445: dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
2446: dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
2447:
2448: /* String options */
2449: dump_cfg_string(oBindAddress, o->bind_address);
2450: dump_cfg_string(oCiphers, o->ciphers ? o->ciphers : KEX_CLIENT_ENCRYPT);
2451: dump_cfg_string(oControlPath, o->control_path);
1.240 djm 2452: dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
1.221 djm 2453: dump_cfg_string(oHostKeyAlias, o->host_key_alias);
1.230 djm 2454: dump_cfg_string(oHostbasedKeyTypes, o->hostbased_key_types);
1.253 ! markus 2455: dump_cfg_string(oIdentityAgent, o->identity_agent);
1.221 djm 2456: dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
2457: dump_cfg_string(oKexAlgorithms, o->kex_algorithms ? o->kex_algorithms : KEX_CLIENT_KEX);
2458: dump_cfg_string(oLocalCommand, o->local_command);
2459: dump_cfg_string(oLogLevel, log_level_name(o->log_level));
2460: dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC);
2461: dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
2462: dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
2463: dump_cfg_string(oProxyCommand, o->proxy_command);
1.242 djm 2464: dump_cfg_string(oPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.230 djm 2465: dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
1.221 djm 2466: dump_cfg_string(oXAuthLocation, o->xauth_location);
2467:
1.230 djm 2468: /* Forwards */
1.221 djm 2469: dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
2470: dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
2471: dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
2472:
2473: /* String array options */
2474: dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
2475: dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
2476: dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
2477: dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
2478: dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
2479:
2480: /* Special cases */
2481:
2482: /* oConnectTimeout */
2483: if (o->connection_timeout == -1)
2484: printf("connecttimeout none\n");
2485: else
2486: dump_cfg_int(oConnectTimeout, o->connection_timeout);
2487:
2488: /* oTunnelDevice */
2489: printf("tunneldevice");
2490: if (o->tun_local == SSH_TUNID_ANY)
2491: printf(" any");
2492: else
2493: printf(" %d", o->tun_local);
2494: if (o->tun_remote == SSH_TUNID_ANY)
2495: printf(":any");
2496: else
2497: printf(":%d", o->tun_remote);
2498: printf("\n");
2499:
2500: /* oCanonicalizePermittedCNAMEs */
2501: if ( o->num_permitted_cnames > 0) {
2502: printf("canonicalizePermittedcnames");
2503: for (i = 0; i < o->num_permitted_cnames; i++) {
2504: printf(" %s:%s", o->permitted_cnames[i].source_list,
2505: o->permitted_cnames[i].target_list);
2506: }
2507: printf("\n");
2508: }
2509:
2510: /* oCipher */
2511: if (o->cipher != SSH_CIPHER_NOT_SET)
2512: printf("Cipher %s\n", cipher_name(o->cipher));
2513:
2514: /* oControlPersist */
2515: if (o->control_persist == 0 || o->control_persist_timeout == 0)
2516: dump_cfg_fmtint(oControlPersist, o->control_persist);
2517: else
2518: dump_cfg_int(oControlPersist, o->control_persist_timeout);
2519:
2520: /* oEscapeChar */
2521: if (o->escape_char == SSH_ESCAPECHAR_NONE)
2522: printf("escapechar none\n");
2523: else {
2524: vis(vbuf, o->escape_char, VIS_WHITE, 0);
2525: printf("escapechar %s\n", vbuf);
2526: }
2527:
2528: /* oIPQoS */
2529: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2530: printf("%s\n", iptos2str(o->ip_qos_bulk));
2531:
2532: /* oRekeyLimit */
1.249 dtucker 2533: printf("rekeylimit %llu %d\n",
2534: (unsigned long long)o->rekey_limit, o->rekey_interval);
1.221 djm 2535:
2536: /* oStreamLocalBindMask */
2537: printf("streamlocalbindmask 0%o\n",
2538: o->fwd_opts.streamlocal_bind_mask);
1.1 deraadt 2539: }
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