Annotation of src/usr.bin/ssh/readconf.c, Revision 1.273
1.273 ! djm 1: /* $OpenBSD: readconf.c,v 1.272 2017/04/30 23:10:43 djm Exp $ */
1.1 deraadt 2: /*
1.18 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Functions for reading the configuration files.
1.26 markus 7: *
1.46 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 13: */
1.1 deraadt 14:
1.147 stevesk 15: #include <sys/types.h>
16: #include <sys/stat.h>
1.152 stevesk 17: #include <sys/socket.h>
1.206 djm 18: #include <sys/wait.h>
1.220 millert 19: #include <sys/un.h>
1.152 stevesk 20:
21: #include <netinet/in.h>
1.190 djm 22: #include <netinet/ip.h>
1.148 stevesk 23:
24: #include <ctype.h>
1.154 stevesk 25: #include <errno.h>
1.206 djm 26: #include <fcntl.h>
1.252 djm 27: #include <glob.h>
1.155 stevesk 28: #include <netdb.h>
1.206 djm 29: #include <paths.h>
30: #include <pwd.h>
1.159 deraadt 31: #include <signal.h>
1.158 stevesk 32: #include <stdio.h>
1.157 stevesk 33: #include <string.h>
1.156 stevesk 34: #include <unistd.h>
1.228 deraadt 35: #include <limits.h>
1.200 dtucker 36: #include <util.h>
1.221 djm 37: #include <vis.h>
1.1 deraadt 38:
1.159 deraadt 39: #include "xmalloc.h"
1.1 deraadt 40: #include "ssh.h"
1.25 markus 41: #include "compat.h"
1.58 markus 42: #include "cipher.h"
1.55 markus 43: #include "pathnames.h"
1.58 markus 44: #include "log.h"
1.227 djm 45: #include "sshkey.h"
1.220 millert 46: #include "misc.h"
1.58 markus 47: #include "readconf.h"
48: #include "match.h"
1.62 markus 49: #include "kex.h"
50: #include "mac.h"
1.206 djm 51: #include "uidswap.h"
1.221 djm 52: #include "myproposal.h"
1.224 djm 53: #include "digest.h"
1.1 deraadt 54:
55: /* Format of the configuration file:
56:
57: # Configuration data is parsed as follows:
58: # 1. command line options
59: # 2. user-specific file
60: # 3. system-wide file
61: # Any configuration value is only changed the first time it is set.
62: # Thus, host-specific definitions should be at the beginning of the
63: # configuration file, and defaults at the end.
64:
65: # Host-specific declarations. These may override anything above. A single
66: # host may match multiple declarations; these are processed in the order
67: # that they are given in.
68:
69: Host *.ngs.fi ngs.fi
1.96 markus 70: User foo
1.1 deraadt 71:
72: Host fake.com
73: HostName another.host.name.real.org
74: User blaah
75: Port 34289
76: ForwardX11 no
77: ForwardAgent no
78:
79: Host books.com
80: RemoteForward 9999 shadows.cs.hut.fi:9999
1.266 djm 81: Ciphers 3des-cbc
1.1 deraadt 82:
83: Host fascist.blob.com
84: Port 23123
85: User tylonen
86: PasswordAuthentication no
87:
88: Host puukko.hut.fi
89: User t35124p
90: ProxyCommand ssh-proxy %h %p
91:
92: Host *.fr
1.96 markus 93: PublicKeyAuthentication no
1.1 deraadt 94:
95: Host *.su
1.266 djm 96: Ciphers aes128-ctr
1.1 deraadt 97: PasswordAuthentication no
98:
1.144 reyk 99: Host vpn.fake.com
100: Tunnel yes
101: TunnelDevice 3
102:
1.1 deraadt 103: # Defaults for various options
104: Host *
105: ForwardAgent no
1.50 markus 106: ForwardX11 no
1.1 deraadt 107: PasswordAuthentication yes
108: RSAAuthentication yes
109: RhostsRSAAuthentication yes
110: StrictHostKeyChecking yes
1.126 markus 111: TcpKeepAlive no
1.1 deraadt 112: IdentityFile ~/.ssh/identity
113: Port 22
114: EscapeChar ~
115:
116: */
117:
1.252 djm 118: static int read_config_file_depth(const char *filename, struct passwd *pw,
119: const char *host, const char *original_host, Options *options,
120: int flags, int *activep, int depth);
121: static int process_config_line_depth(Options *options, struct passwd *pw,
122: const char *host, const char *original_host, char *line,
123: const char *filename, int linenum, int *activep, int flags, int depth);
124:
1.1 deraadt 125: /* Keyword tokens. */
126:
1.17 markus 127: typedef enum {
128: oBadOption,
1.252 djm 129: oHost, oMatch, oInclude,
1.186 djm 130: oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
131: oGatewayPorts, oExitOnForwardFailure,
1.100 deraadt 132: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 133: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 134: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
1.253 markus 135: oCertificateFile, oAddKeysToAgent, oIdentityAgent,
1.206 djm 136: oUser, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
1.17 markus 137: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
138: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 139: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.273 ! djm 140: oUsePrivilegedPort, oLogFacility, oLogLevel, oCiphers, oMacs,
1.221 djm 141: oPubkeyAuthentication,
1.67 markus 142: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 143: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.183 markus 144: oHostKeyAlgorithms, oBindAddress, oPKCS11Provider,
1.96 markus 145: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 146: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 147: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 148: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.187 djm 149: oSendEnv, oControlPath, oControlMaster, oControlPersist,
150: oHashKnownHosts,
1.144 reyk 151: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.248 markus 152: oVisualHostKey,
1.205 djm 153: oKexAlgorithms, oIPQoS, oRequestTTY, oIgnoreUnknown, oProxyUseFdpass,
1.209 djm 154: oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
155: oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
1.223 djm 156: oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
1.230 djm 157: oFingerprintHash, oUpdateHostkeys, oHostbasedKeyTypes,
1.257 djm 158: oPubkeyAcceptedKeyTypes, oProxyJump,
1.273 ! djm 159: oIgnore, 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[] = {
1.266 djm 168: /* Deprecated options */
1.273 ! djm 169: { "protocol", oIgnore }, /* NB. silently ignored */
1.266 djm 170: { "fallbacktorsh", oDeprecated },
171: { "globalknownhostsfile2", oDeprecated },
172: { "rhostsauthentication", oDeprecated },
173: { "userknownhostsfile2", oDeprecated },
174: { "useroaming", oDeprecated },
175: { "usersh", oDeprecated },
176:
177: /* Unsupported options */
178: { "afstokenpassing", oUnsupported },
179: { "kerberosauthentication", oUnsupported },
180: { "kerberostgtpassing", oUnsupported },
181:
182: /* Sometimes-unsupported options */
183: #if defined(GSSAPI)
184: { "gssapiauthentication", oGssAuthentication },
185: { "gssapidelegatecredentials", oGssDelegateCreds },
186: # else
187: { "gssapiauthentication", oUnsupported },
188: { "gssapidelegatecredentials", oUnsupported },
189: #endif
190: #ifdef ENABLE_PKCS11
191: { "smartcarddevice", oPKCS11Provider },
192: { "pkcs11provider", oPKCS11Provider },
193: # else
194: { "smartcarddevice", oUnsupported },
195: { "pkcs11provider", oUnsupported },
196: #endif
197: { "rsaauthentication", oUnsupported },
198: { "rhostsrsaauthentication", oUnsupported },
199: { "compressionlevel", oUnsupported },
200:
1.17 markus 201: { "forwardagent", oForwardAgent },
202: { "forwardx11", oForwardX11 },
1.123 markus 203: { "forwardx11trusted", oForwardX11Trusted },
1.186 djm 204: { "forwardx11timeout", oForwardX11Timeout },
1.153 markus 205: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 206: { "xauthlocation", oXAuthLocation },
1.17 markus 207: { "gatewayports", oGatewayPorts },
208: { "useprivilegedport", oUsePrivilegedPort },
209: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 210: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
211: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.50 markus 212: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 213: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.73 markus 214: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 215: { "challengeresponseauthentication", oChallengeResponseAuthentication },
216: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
217: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.17 markus 218: { "identityfile", oIdentityFile },
1.174 stevesk 219: { "identityfile2", oIdentityFile }, /* obsolete */
1.128 markus 220: { "identitiesonly", oIdentitiesOnly },
1.241 djm 221: { "certificatefile", oCertificateFile },
1.246 jcs 222: { "addkeystoagent", oAddKeysToAgent },
1.253 markus 223: { "identityagent", oIdentityAgent },
1.17 markus 224: { "hostname", oHostName },
1.52 markus 225: { "hostkeyalias", oHostKeyAlias },
1.17 markus 226: { "proxycommand", oProxyCommand },
227: { "port", oPort },
228: { "cipher", oCipher },
1.25 markus 229: { "ciphers", oCiphers },
1.62 markus 230: { "macs", oMacs },
1.17 markus 231: { "remoteforward", oRemoteForward },
232: { "localforward", oLocalForward },
233: { "user", oUser },
234: { "host", oHost },
1.206 djm 235: { "match", oMatch },
1.17 markus 236: { "escapechar", oEscapeChar },
237: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.174 stevesk 238: { "userknownhostsfile", oUserKnownHostsFile },
1.17 markus 239: { "connectionattempts", oConnectionAttempts },
240: { "batchmode", oBatchMode },
241: { "checkhostip", oCheckHostIP },
242: { "stricthostkeychecking", oStrictHostKeyChecking },
243: { "compression", oCompression },
1.126 markus 244: { "tcpkeepalive", oTCPKeepAlive },
245: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 246: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
1.271 dtucker 247: { "syslogfacility", oLogFacility },
1.17 markus 248: { "loglevel", oLogLevel },
1.71 markus 249: { "dynamicforward", oDynamicForward },
1.67 markus 250: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 251: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 252: { "bindaddress", oBindAddress },
1.93 deraadt 253: { "clearallforwardings", oClearAllForwardings },
1.101 markus 254: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 255: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 256: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 257: { "rekeylimit", oRekeyLimit },
1.111 djm 258: { "connecttimeout", oConnectTimeout },
1.112 djm 259: { "addressfamily", oAddressFamily },
1.127 markus 260: { "serveraliveinterval", oServerAliveInterval },
261: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 262: { "sendenv", oSendEnv },
1.132 djm 263: { "controlpath", oControlPath },
264: { "controlmaster", oControlMaster },
1.187 djm 265: { "controlpersist", oControlPersist },
1.136 djm 266: { "hashknownhosts", oHashKnownHosts },
1.252 djm 267: { "include", oInclude },
1.144 reyk 268: { "tunnel", oTunnel },
269: { "tunneldevice", oTunnelDevice },
270: { "localcommand", oLocalCommand },
271: { "permitlocalcommand", oPermitLocalCommand },
1.167 grunk 272: { "visualhostkey", oVisualHostKey },
1.189 djm 273: { "kexalgorithms", oKexAlgorithms },
1.190 djm 274: { "ipqos", oIPQoS },
1.192 djm 275: { "requesttty", oRequestTTY },
1.205 djm 276: { "proxyusefdpass", oProxyUseFdpass },
1.208 djm 277: { "canonicaldomains", oCanonicalDomains },
1.209 djm 278: { "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
279: { "canonicalizehostname", oCanonicalizeHostname },
280: { "canonicalizemaxdots", oCanonicalizeMaxDots },
281: { "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
1.220 millert 282: { "streamlocalbindmask", oStreamLocalBindMask },
283: { "streamlocalbindunlink", oStreamLocalBindUnlink },
1.223 djm 284: { "revokedhostkeys", oRevokedHostKeys },
1.224 djm 285: { "fingerprinthash", oFingerprintHash },
1.229 djm 286: { "updatehostkeys", oUpdateHostkeys },
1.230 djm 287: { "hostbasedkeytypes", oHostbasedKeyTypes },
1.238 markus 288: { "pubkeyacceptedkeytypes", oPubkeyAcceptedKeyTypes },
1.199 djm 289: { "ignoreunknown", oIgnoreUnknown },
1.257 djm 290: { "proxyjump", oProxyJump },
1.171 djm 291:
1.92 stevesk 292: { NULL, oBadOption }
1.13 markus 293: };
294:
1.19 markus 295: /*
296: * Adds a local TCP/IP port forward to options. Never returns if there is an
297: * error.
298: */
1.1 deraadt 299:
1.26 markus 300: void
1.220 millert 301: add_local_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 302: {
1.220 millert 303: struct Forward *fwd;
1.17 markus 304: extern uid_t original_real_uid;
1.251 djm 305: int i;
1.185 djm 306:
1.262 jsg 307: if (!bind_permitted(newfwd->listen_port, original_real_uid) &&
1.220 millert 308: newfwd->listen_path == NULL)
1.64 millert 309: fatal("Privileged ports can only be forwarded by root.");
1.251 djm 310: /* Don't add duplicates */
311: for (i = 0; i < options->num_local_forwards; i++) {
312: if (forward_equals(newfwd, options->local_forwards + i))
313: return;
314: }
1.234 deraadt 315: options->local_forwards = xreallocarray(options->local_forwards,
1.185 djm 316: options->num_local_forwards + 1,
317: sizeof(*options->local_forwards));
1.17 markus 318: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 319:
1.172 stevesk 320: fwd->listen_host = newfwd->listen_host;
1.135 djm 321: fwd->listen_port = newfwd->listen_port;
1.220 millert 322: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 323: fwd->connect_host = newfwd->connect_host;
1.135 djm 324: fwd->connect_port = newfwd->connect_port;
1.220 millert 325: fwd->connect_path = newfwd->connect_path;
1.1 deraadt 326: }
327:
1.19 markus 328: /*
329: * Adds a remote TCP/IP port forward to options. Never returns if there is
330: * an error.
331: */
1.1 deraadt 332:
1.26 markus 333: void
1.220 millert 334: add_remote_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 335: {
1.220 millert 336: struct Forward *fwd;
1.251 djm 337: int i;
1.185 djm 338:
1.251 djm 339: /* Don't add duplicates */
340: for (i = 0; i < options->num_remote_forwards; i++) {
341: if (forward_equals(newfwd, options->remote_forwards + i))
342: return;
343: }
1.234 deraadt 344: options->remote_forwards = xreallocarray(options->remote_forwards,
1.185 djm 345: options->num_remote_forwards + 1,
346: sizeof(*options->remote_forwards));
1.17 markus 347: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 348:
1.172 stevesk 349: fwd->listen_host = newfwd->listen_host;
1.135 djm 350: fwd->listen_port = newfwd->listen_port;
1.220 millert 351: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 352: fwd->connect_host = newfwd->connect_host;
1.135 djm 353: fwd->connect_port = newfwd->connect_port;
1.220 millert 354: fwd->connect_path = newfwd->connect_path;
1.194 markus 355: fwd->handle = newfwd->handle;
1.184 markus 356: fwd->allocated_port = 0;
1.1 deraadt 357: }
358:
1.90 stevesk 359: static void
360: clear_forwardings(Options *options)
361: {
362: int i;
363:
1.135 djm 364: for (i = 0; i < options->num_local_forwards; i++) {
1.202 djm 365: free(options->local_forwards[i].listen_host);
1.220 millert 366: free(options->local_forwards[i].listen_path);
1.202 djm 367: free(options->local_forwards[i].connect_host);
1.220 millert 368: free(options->local_forwards[i].connect_path);
1.135 djm 369: }
1.185 djm 370: if (options->num_local_forwards > 0) {
1.202 djm 371: free(options->local_forwards);
1.185 djm 372: options->local_forwards = NULL;
373: }
1.90 stevesk 374: options->num_local_forwards = 0;
1.135 djm 375: for (i = 0; i < options->num_remote_forwards; i++) {
1.202 djm 376: free(options->remote_forwards[i].listen_host);
1.220 millert 377: free(options->remote_forwards[i].listen_path);
1.202 djm 378: free(options->remote_forwards[i].connect_host);
1.220 millert 379: free(options->remote_forwards[i].connect_path);
1.135 djm 380: }
1.185 djm 381: if (options->num_remote_forwards > 0) {
1.202 djm 382: free(options->remote_forwards);
1.185 djm 383: options->remote_forwards = NULL;
384: }
1.90 stevesk 385: options->num_remote_forwards = 0;
1.145 reyk 386: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 387: }
388:
1.195 dtucker 389: void
1.241 djm 390: add_certificate_file(Options *options, const char *path, int userprovided)
391: {
392: int i;
393:
394: if (options->num_certificate_files >= SSH_MAX_CERTIFICATE_FILES)
395: fatal("Too many certificate files specified (max %d)",
396: SSH_MAX_CERTIFICATE_FILES);
397:
398: /* Avoid registering duplicates */
399: for (i = 0; i < options->num_certificate_files; i++) {
400: if (options->certificate_file_userprovided[i] == userprovided &&
401: strcmp(options->certificate_files[i], path) == 0) {
402: debug2("%s: ignoring duplicate key %s", __func__, path);
403: return;
404: }
405: }
406:
407: options->certificate_file_userprovided[options->num_certificate_files] =
408: userprovided;
409: options->certificate_files[options->num_certificate_files++] =
410: xstrdup(path);
411: }
412:
413: void
1.195 dtucker 414: add_identity_file(Options *options, const char *dir, const char *filename,
415: int userprovided)
416: {
417: char *path;
1.219 djm 418: int i;
1.195 dtucker 419:
420: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
421: fatal("Too many identity files specified (max %d)",
422: SSH_MAX_IDENTITY_FILES);
423:
424: if (dir == NULL) /* no dir, filename is absolute */
425: path = xstrdup(filename);
426: else
427: (void)xasprintf(&path, "%.100s%.100s", dir, filename);
1.219 djm 428:
429: /* Avoid registering duplicates */
430: for (i = 0; i < options->num_identity_files; i++) {
431: if (options->identity_file_userprovided[i] == userprovided &&
432: strcmp(options->identity_files[i], path) == 0) {
433: debug2("%s: ignoring duplicate key %s", __func__, path);
434: free(path);
435: return;
436: }
437: }
1.195 dtucker 438:
439: options->identity_file_userprovided[options->num_identity_files] =
440: userprovided;
441: options->identity_files[options->num_identity_files++] = path;
442: }
443:
1.206 djm 444: int
445: default_ssh_port(void)
446: {
447: static int port;
448: struct servent *sp;
449:
450: if (port == 0) {
451: sp = getservbyname(SSH_SERVICE_NAME, "tcp");
452: port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
453: }
454: return port;
455: }
456:
457: /*
458: * Execute a command in a shell.
459: * Return its exit status or -1 on abnormal exit.
460: */
461: static int
462: execute_in_shell(const char *cmd)
463: {
1.243 dtucker 464: char *shell;
1.206 djm 465: pid_t pid;
466: int devnull, status;
467: extern uid_t original_real_uid;
468:
469: if ((shell = getenv("SHELL")) == NULL)
470: shell = _PATH_BSHELL;
471:
472: /* Need this to redirect subprocess stdin/out */
473: if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
474: fatal("open(/dev/null): %s", strerror(errno));
475:
476: debug("Executing command: '%.500s'", cmd);
477:
478: /* Fork and execute the command. */
479: if ((pid = fork()) == 0) {
1.245 djm 480: char *argv[4];
1.206 djm 481:
482: /* Child. Permanently give up superuser privileges. */
483: permanently_drop_suid(original_real_uid);
484:
485: /* Redirect child stdin and stdout. Leave stderr */
486: if (dup2(devnull, STDIN_FILENO) == -1)
487: fatal("dup2: %s", strerror(errno));
488: if (dup2(devnull, STDOUT_FILENO) == -1)
489: fatal("dup2: %s", strerror(errno));
490: if (devnull > STDERR_FILENO)
491: close(devnull);
492: closefrom(STDERR_FILENO + 1);
1.245 djm 493:
494: argv[0] = shell;
495: argv[1] = "-c";
496: argv[2] = xstrdup(cmd);
497: argv[3] = NULL;
1.206 djm 498:
499: execv(argv[0], argv);
500: error("Unable to execute '%.100s': %s", cmd, strerror(errno));
501: /* Die with signal to make this error apparent to parent. */
502: signal(SIGTERM, SIG_DFL);
503: kill(getpid(), SIGTERM);
504: _exit(1);
505: }
506: /* Parent. */
507: if (pid < 0)
508: fatal("%s: fork: %.100s", __func__, strerror(errno));
509:
510: close(devnull);
511:
512: while (waitpid(pid, &status, 0) == -1) {
513: if (errno != EINTR && errno != EAGAIN)
514: fatal("%s: waitpid: %s", __func__, strerror(errno));
515: }
516: if (!WIFEXITED(status)) {
517: error("command '%.100s' exited abnormally", cmd);
518: return -1;
1.221 djm 519: }
1.206 djm 520: debug3("command returned status %d", WEXITSTATUS(status));
521: return WEXITSTATUS(status);
522: }
523:
524: /*
525: * Parse and execute a Match directive.
526: */
527: static int
528: match_cfg_line(Options *options, char **condition, struct passwd *pw,
1.221 djm 529: const char *host_arg, const char *original_host, int post_canon,
530: const char *filename, int linenum)
1.206 djm 531: {
1.221 djm 532: char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria;
1.211 djm 533: const char *ruser;
1.221 djm 534: int r, port, this_result, result = 1, attributes = 0, negate;
1.206 djm 535: char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
536:
537: /*
538: * Configuration is likely to be incomplete at this point so we
539: * must be prepared to use default values.
540: */
541: port = options->port <= 0 ? default_ssh_port() : options->port;
542: ruser = options->user == NULL ? pw->pw_name : options->user;
1.250 djm 543: if (post_canon) {
544: host = xstrdup(options->hostname);
545: } else if (options->hostname != NULL) {
1.212 djm 546: /* NB. Please keep in sync with ssh.c:main() */
1.211 djm 547: host = percent_expand(options->hostname,
548: "h", host_arg, (char *)NULL);
1.250 djm 549: } else {
1.211 djm 550: host = xstrdup(host_arg);
1.250 djm 551: }
1.206 djm 552:
1.221 djm 553: debug2("checking match for '%s' host %s originally %s",
554: cp, host, original_host);
555: while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') {
556: criteria = NULL;
557: this_result = 1;
558: if ((negate = attrib[0] == '!'))
559: attrib++;
560: /* criteria "all" and "canonical" have no argument */
1.213 dtucker 561: if (strcasecmp(attrib, "all") == 0) {
1.221 djm 562: if (attributes > 1 ||
1.213 dtucker 563: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
1.221 djm 564: error("%.200s line %d: '%s' cannot be combined "
565: "with other Match attributes",
566: filename, linenum, oattrib);
1.213 dtucker 567: result = -1;
568: goto out;
569: }
1.221 djm 570: if (result)
571: result = negate ? 0 : 1;
1.213 dtucker 572: goto out;
573: }
1.221 djm 574: attributes++;
575: if (strcasecmp(attrib, "canonical") == 0) {
576: r = !!post_canon; /* force bitmask member to boolean */
577: if (r == (negate ? 1 : 0))
578: this_result = result = 0;
579: debug3("%.200s line %d: %smatched '%s'",
580: filename, linenum,
581: this_result ? "" : "not ", oattrib);
582: continue;
583: }
584: /* All other criteria require an argument */
1.206 djm 585: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
586: error("Missing Match criteria for %s", attrib);
1.211 djm 587: result = -1;
588: goto out;
1.206 djm 589: }
590: if (strcasecmp(attrib, "host") == 0) {
1.221 djm 591: criteria = xstrdup(host);
1.235 djm 592: r = match_hostname(host, arg) == 1;
1.221 djm 593: if (r == (negate ? 1 : 0))
594: this_result = result = 0;
1.206 djm 595: } else if (strcasecmp(attrib, "originalhost") == 0) {
1.221 djm 596: criteria = xstrdup(original_host);
1.235 djm 597: r = match_hostname(original_host, arg) == 1;
1.221 djm 598: if (r == (negate ? 1 : 0))
599: this_result = result = 0;
1.206 djm 600: } else if (strcasecmp(attrib, "user") == 0) {
1.221 djm 601: criteria = xstrdup(ruser);
1.235 djm 602: r = match_pattern_list(ruser, arg, 0) == 1;
1.221 djm 603: if (r == (negate ? 1 : 0))
604: this_result = result = 0;
1.206 djm 605: } else if (strcasecmp(attrib, "localuser") == 0) {
1.221 djm 606: criteria = xstrdup(pw->pw_name);
1.235 djm 607: r = match_pattern_list(pw->pw_name, arg, 0) == 1;
1.221 djm 608: if (r == (negate ? 1 : 0))
609: this_result = result = 0;
1.210 djm 610: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 611: if (gethostname(thishost, sizeof(thishost)) == -1)
612: fatal("gethostname: %s", strerror(errno));
613: strlcpy(shorthost, thishost, sizeof(shorthost));
614: shorthost[strcspn(thishost, ".")] = '\0';
615: snprintf(portstr, sizeof(portstr), "%d", port);
616:
617: cmd = percent_expand(arg,
618: "L", shorthost,
619: "d", pw->pw_dir,
620: "h", host,
621: "l", thishost,
1.221 djm 622: "n", original_host,
1.206 djm 623: "p", portstr,
624: "r", ruser,
625: "u", pw->pw_name,
626: (char *)NULL);
1.217 djm 627: if (result != 1) {
628: /* skip execution if prior predicate failed */
1.221 djm 629: debug3("%.200s line %d: skipped exec "
630: "\"%.100s\"", filename, linenum, cmd);
631: free(cmd);
632: continue;
633: }
634: r = execute_in_shell(cmd);
635: if (r == -1) {
636: fatal("%.200s line %d: match exec "
637: "'%.100s' error", filename,
638: linenum, cmd);
1.217 djm 639: }
1.221 djm 640: criteria = xstrdup(cmd);
1.206 djm 641: free(cmd);
1.221 djm 642: /* Force exit status to boolean */
643: r = r == 0;
644: if (r == (negate ? 1 : 0))
645: this_result = result = 0;
1.206 djm 646: } else {
647: error("Unsupported Match attribute %s", attrib);
1.211 djm 648: result = -1;
649: goto out;
1.206 djm 650: }
1.221 djm 651: debug3("%.200s line %d: %smatched '%s \"%.100s\"' ",
652: filename, linenum, this_result ? "": "not ",
653: oattrib, criteria);
654: free(criteria);
1.213 dtucker 655: }
656: if (attributes == 0) {
657: error("One or more attributes required for Match");
658: result = -1;
659: goto out;
1.206 djm 660: }
1.221 djm 661: out:
662: if (result != -1)
663: debug2("match %sfound", result ? "" : "not ");
1.206 djm 664: *condition = cp;
1.211 djm 665: free(host);
1.206 djm 666: return result;
667: }
668:
1.208 djm 669: /* Check and prepare a domain name: removes trailing '.' and lowercases */
670: static void
671: valid_domain(char *name, const char *filename, int linenum)
672: {
673: size_t i, l = strlen(name);
674: u_char c, last = '\0';
675:
676: if (l == 0)
677: fatal("%s line %d: empty hostname suffix", filename, linenum);
678: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
679: fatal("%s line %d: hostname suffix \"%.100s\" "
680: "starts with invalid character", filename, linenum, name);
681: for (i = 0; i < l; i++) {
682: c = tolower((u_char)name[i]);
683: name[i] = (char)c;
684: if (last == '.' && c == '.')
685: fatal("%s line %d: hostname suffix \"%.100s\" contains "
686: "consecutive separators", filename, linenum, name);
687: if (c != '.' && c != '-' && !isalnum(c) &&
688: c != '_') /* technically invalid, but common */
689: fatal("%s line %d: hostname suffix \"%.100s\" contains "
690: "invalid characters", filename, linenum, name);
691: last = c;
692: }
693: if (name[l - 1] == '.')
694: name[l - 1] = '\0';
695: }
696:
1.19 markus 697: /*
1.70 stevesk 698: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 699: */
1.26 markus 700: static OpCodes
1.199 djm 701: parse_token(const char *cp, const char *filename, int linenum,
702: const char *ignored_unknown)
1.1 deraadt 703: {
1.199 djm 704: int i;
1.1 deraadt 705:
1.17 markus 706: for (i = 0; keywords[i].name; i++)
1.199 djm 707: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 708: return keywords[i].opcode;
1.235 djm 709: if (ignored_unknown != NULL &&
710: match_pattern_list(cp, ignored_unknown, 1) == 1)
1.199 djm 711: return oIgnoredUnknownOption;
1.75 stevesk 712: error("%s: line %d: Bad configuration option: %s",
713: filename, linenum, cp);
1.17 markus 714: return oBadOption;
1.1 deraadt 715: }
716:
1.207 djm 717: /* Multistate option parsing */
718: struct multistate {
719: char *key;
720: int value;
721: };
722: static const struct multistate multistate_flag[] = {
723: { "true", 1 },
724: { "false", 0 },
725: { "yes", 1 },
726: { "no", 0 },
727: { NULL, -1 }
728: };
729: static const struct multistate multistate_yesnoask[] = {
730: { "true", 1 },
731: { "false", 0 },
732: { "yes", 1 },
733: { "no", 0 },
734: { "ask", 2 },
735: { NULL, -1 }
736: };
1.246 jcs 737: static const struct multistate multistate_yesnoaskconfirm[] = {
738: { "true", 1 },
739: { "false", 0 },
740: { "yes", 1 },
741: { "no", 0 },
742: { "ask", 2 },
743: { "confirm", 3 },
744: { NULL, -1 }
745: };
1.207 djm 746: static const struct multistate multistate_addressfamily[] = {
747: { "inet", AF_INET },
748: { "inet6", AF_INET6 },
749: { "any", AF_UNSPEC },
750: { NULL, -1 }
751: };
752: static const struct multistate multistate_controlmaster[] = {
753: { "true", SSHCTL_MASTER_YES },
754: { "yes", SSHCTL_MASTER_YES },
755: { "false", SSHCTL_MASTER_NO },
756: { "no", SSHCTL_MASTER_NO },
757: { "auto", SSHCTL_MASTER_AUTO },
758: { "ask", SSHCTL_MASTER_ASK },
759: { "autoask", SSHCTL_MASTER_AUTO_ASK },
760: { NULL, -1 }
761: };
762: static const struct multistate multistate_tunnel[] = {
763: { "ethernet", SSH_TUNMODE_ETHERNET },
764: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
765: { "true", SSH_TUNMODE_DEFAULT },
766: { "yes", SSH_TUNMODE_DEFAULT },
767: { "false", SSH_TUNMODE_NO },
768: { "no", SSH_TUNMODE_NO },
769: { NULL, -1 }
770: };
771: static const struct multistate multistate_requesttty[] = {
772: { "true", REQUEST_TTY_YES },
773: { "yes", REQUEST_TTY_YES },
774: { "false", REQUEST_TTY_NO },
775: { "no", REQUEST_TTY_NO },
776: { "force", REQUEST_TTY_FORCE },
777: { "auto", REQUEST_TTY_AUTO },
778: { NULL, -1 }
779: };
1.209 djm 780: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 781: { "true", SSH_CANONICALISE_YES },
782: { "false", SSH_CANONICALISE_NO },
783: { "yes", SSH_CANONICALISE_YES },
784: { "no", SSH_CANONICALISE_NO },
785: { "always", SSH_CANONICALISE_ALWAYS },
786: { NULL, -1 }
787: };
1.207 djm 788:
1.19 markus 789: /*
790: * Processes a single option line as used in the configuration files. This
791: * only sets those values that have not already been set.
792: */
1.14 markus 793: int
1.206 djm 794: process_config_line(Options *options, struct passwd *pw, const char *host,
1.221 djm 795: const char *original_host, char *line, const char *filename,
796: int linenum, int *activep, int flags)
1.1 deraadt 797: {
1.252 djm 798: return process_config_line_depth(options, pw, host, original_host,
799: line, filename, linenum, activep, flags, 0);
800: }
801:
802: #define WHITESPACE " \t\r\n"
803: static int
804: process_config_line_depth(Options *options, struct passwd *pw, const char *host,
805: const char *original_host, char *line, const char *filename,
806: int linenum, int *activep, int flags, int depth)
807: {
1.193 djm 808: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
809: char **cpptr, fwdarg[256];
1.199 djm 810: u_int i, *uintptr, max_entries = 0;
1.252 djm 811: int r, oactive, negated, opcode, *intptr, value, value2, cmdline = 0;
1.164 dtucker 812: LogLevel *log_level_ptr;
1.271 dtucker 813: SyslogFacility *log_facility_ptr;
1.201 dtucker 814: long long val64;
1.102 markus 815: size_t len;
1.220 millert 816: struct Forward fwd;
1.207 djm 817: const struct multistate *multistate_ptr;
1.208 djm 818: struct allowed_cname *cname;
1.252 djm 819: glob_t gl;
1.106 djm 820:
1.206 djm 821: if (activep == NULL) { /* We are processing a command line directive */
822: cmdline = 1;
823: activep = &cmdline;
824: }
825:
1.267 djm 826: /* Strip trailing whitespace. Allow \f (form feed) at EOL only */
1.233 djm 827: if ((len = strlen(line)) == 0)
828: return 0;
829: for (len--; len > 0; len--) {
1.267 djm 830: if (strchr(WHITESPACE "\f", line[len]) == NULL)
1.106 djm 831: break;
832: line[len] = '\0';
833: }
1.1 deraadt 834:
1.42 provos 835: s = line;
836: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 837: if ((keyword = strdelim(&s)) == NULL)
838: return 0;
1.42 provos 839: /* Ignore leading whitespace. */
840: if (*keyword == '\0')
1.43 markus 841: keyword = strdelim(&s);
1.56 deraadt 842: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 843: return 0;
1.199 djm 844: /* Match lowercase keyword */
1.207 djm 845: lowercase(keyword);
1.17 markus 846:
1.199 djm 847: opcode = parse_token(keyword, filename, linenum,
848: options->ignored_unknown);
1.17 markus 849:
850: switch (opcode) {
851: case oBadOption:
1.19 markus 852: /* don't panic, but count bad options */
853: return -1;
1.273 ! djm 854: case oIgnore:
! 855: return 0;
1.199 djm 856: case oIgnoredUnknownOption:
857: debug("%s line %d: Ignored unknown option \"%s\"",
858: filename, linenum, keyword);
859: return 0;
1.111 djm 860: case oConnectTimeout:
861: intptr = &options->connection_timeout;
1.127 markus 862: parse_time:
1.111 djm 863: arg = strdelim(&s);
864: if (!arg || *arg == '\0')
865: fatal("%s line %d: missing time value.",
866: filename, linenum);
1.221 djm 867: if (strcmp(arg, "none") == 0)
868: value = -1;
869: else if ((value = convtime(arg)) == -1)
1.111 djm 870: fatal("%s line %d: invalid time value.",
871: filename, linenum);
1.160 dtucker 872: if (*activep && *intptr == -1)
1.111 djm 873: *intptr = value;
874: break;
875:
1.17 markus 876: case oForwardAgent:
877: intptr = &options->forward_agent;
1.207 djm 878: parse_flag:
879: multistate_ptr = multistate_flag;
880: parse_multistate:
1.42 provos 881: arg = strdelim(&s);
1.40 ho 882: if (!arg || *arg == '\0')
1.207 djm 883: fatal("%s line %d: missing argument.",
884: filename, linenum);
885: value = -1;
886: for (i = 0; multistate_ptr[i].key != NULL; i++) {
887: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
888: value = multistate_ptr[i].value;
889: break;
890: }
891: }
892: if (value == -1)
893: fatal("%s line %d: unsupported option \"%s\".",
894: filename, linenum, arg);
1.17 markus 895: if (*activep && *intptr == -1)
896: *intptr = value;
897: break;
898:
899: case oForwardX11:
900: intptr = &options->forward_x11;
901: goto parse_flag;
902:
1.123 markus 903: case oForwardX11Trusted:
904: intptr = &options->forward_x11_trusted;
905: goto parse_flag;
1.221 djm 906:
1.186 djm 907: case oForwardX11Timeout:
908: intptr = &options->forward_x11_timeout;
909: goto parse_time;
1.123 markus 910:
1.17 markus 911: case oGatewayPorts:
1.220 millert 912: intptr = &options->fwd_opts.gateway_ports;
1.17 markus 913: goto parse_flag;
914:
1.153 markus 915: case oExitOnForwardFailure:
916: intptr = &options->exit_on_forward_failure;
917: goto parse_flag;
918:
1.17 markus 919: case oUsePrivilegedPort:
920: intptr = &options->use_privileged_port;
921: goto parse_flag;
922:
923: case oPasswordAuthentication:
924: intptr = &options->password_authentication;
925: goto parse_flag;
926:
1.48 markus 927: case oKbdInteractiveAuthentication:
928: intptr = &options->kbd_interactive_authentication;
929: goto parse_flag;
930:
931: case oKbdInteractiveDevices:
932: charptr = &options->kbd_interactive_devices;
933: goto parse_string;
934:
1.50 markus 935: case oPubkeyAuthentication:
936: intptr = &options->pubkey_authentication;
1.30 markus 937: goto parse_flag;
938:
1.17 markus 939: case oRSAAuthentication:
940: intptr = &options->rsa_authentication;
941: goto parse_flag;
942:
943: case oRhostsRSAAuthentication:
944: intptr = &options->rhosts_rsa_authentication;
945: goto parse_flag;
946:
1.72 markus 947: case oHostbasedAuthentication:
948: intptr = &options->hostbased_authentication;
949: goto parse_flag;
950:
1.59 markus 951: case oChallengeResponseAuthentication:
1.78 markus 952: intptr = &options->challenge_response_authentication;
1.17 markus 953: goto parse_flag;
1.108 jakob 954:
1.118 markus 955: case oGssAuthentication:
956: intptr = &options->gss_authentication;
957: goto parse_flag;
958:
959: case oGssDelegateCreds:
960: intptr = &options->gss_deleg_creds;
961: goto parse_flag;
962:
1.17 markus 963: case oBatchMode:
964: intptr = &options->batch_mode;
965: goto parse_flag;
966:
967: case oCheckHostIP:
968: intptr = &options->check_host_ip;
1.167 grunk 969: goto parse_flag;
1.17 markus 970:
1.107 jakob 971: case oVerifyHostKeyDNS:
972: intptr = &options->verify_host_key_dns;
1.207 djm 973: multistate_ptr = multistate_yesnoask;
974: goto parse_multistate;
1.107 jakob 975:
1.17 markus 976: case oStrictHostKeyChecking:
977: intptr = &options->strict_host_key_checking;
1.207 djm 978: multistate_ptr = multistate_yesnoask;
979: goto parse_multistate;
1.17 markus 980:
981: case oCompression:
982: intptr = &options->compression;
983: goto parse_flag;
984:
1.126 markus 985: case oTCPKeepAlive:
986: intptr = &options->tcp_keep_alive;
1.17 markus 987: goto parse_flag;
988:
1.91 markus 989: case oNoHostAuthenticationForLocalhost:
990: intptr = &options->no_host_authentication_for_localhost;
991: goto parse_flag;
992:
1.17 markus 993: case oNumberOfPasswordPrompts:
994: intptr = &options->number_of_password_prompts;
995: goto parse_int;
996:
997: case oCompressionLevel:
998: intptr = &options->compression_level;
999: goto parse_int;
1000:
1.105 markus 1001: case oRekeyLimit:
1002: arg = strdelim(&s);
1003: if (!arg || *arg == '\0')
1.198 dtucker 1004: fatal("%.200s line %d: Missing argument.", filename,
1005: linenum);
1006: if (strcmp(arg, "default") == 0) {
1007: val64 = 0;
1008: } else {
1.200 dtucker 1009: if (scan_scaled(arg, &val64) == -1)
1010: fatal("%.200s line %d: Bad number '%s': %s",
1011: filename, linenum, arg, strerror(errno));
1.198 dtucker 1012: if (val64 != 0 && val64 < 16)
1013: fatal("%.200s line %d: RekeyLimit too small",
1014: filename, linenum);
1.105 markus 1015: }
1.165 djm 1016: if (*activep && options->rekey_limit == -1)
1.249 dtucker 1017: options->rekey_limit = val64;
1.198 dtucker 1018: if (s != NULL) { /* optional rekey interval present */
1019: if (strcmp(s, "none") == 0) {
1020: (void)strdelim(&s); /* discard */
1021: break;
1022: }
1023: intptr = &options->rekey_interval;
1024: goto parse_time;
1025: }
1.105 markus 1026: break;
1027:
1.17 markus 1028: case oIdentityFile:
1.42 provos 1029: arg = strdelim(&s);
1.40 ho 1030: if (!arg || *arg == '\0')
1.17 markus 1031: fatal("%.200s line %d: Missing argument.", filename, linenum);
1032: if (*activep) {
1.50 markus 1033: intptr = &options->num_identity_files;
1.27 markus 1034: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 1035: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 1036: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.221 djm 1037: add_identity_file(options, NULL,
1038: arg, flags & SSHCONF_USERCONF);
1.17 markus 1039: }
1040: break;
1041:
1.241 djm 1042: case oCertificateFile:
1043: arg = strdelim(&s);
1044: if (!arg || *arg == '\0')
1045: fatal("%.200s line %d: Missing argument.",
1046: filename, linenum);
1047: if (*activep) {
1048: intptr = &options->num_certificate_files;
1049: if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
1050: fatal("%.200s line %d: Too many certificate "
1051: "files specified (max %d).",
1052: filename, linenum,
1053: SSH_MAX_CERTIFICATE_FILES);
1054: }
1055: add_certificate_file(options, arg,
1056: flags & SSHCONF_USERCONF);
1057: }
1058: break;
1059:
1.34 markus 1060: case oXAuthLocation:
1061: charptr=&options->xauth_location;
1062: goto parse_string;
1063:
1.17 markus 1064: case oUser:
1065: charptr = &options->user;
1066: parse_string:
1.42 provos 1067: arg = strdelim(&s);
1.40 ho 1068: if (!arg || *arg == '\0')
1.193 djm 1069: fatal("%.200s line %d: Missing argument.",
1070: filename, linenum);
1.17 markus 1071: if (*activep && *charptr == NULL)
1.38 provos 1072: *charptr = xstrdup(arg);
1.17 markus 1073: break;
1074:
1075: case oGlobalKnownHostsFile:
1.193 djm 1076: cpptr = (char **)&options->system_hostfiles;
1077: uintptr = &options->num_system_hostfiles;
1078: max_entries = SSH_MAX_HOSTS_FILES;
1079: parse_char_array:
1080: if (*activep && *uintptr == 0) {
1081: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1082: if ((*uintptr) >= max_entries)
1083: fatal("%s line %d: "
1084: "too many authorized keys files.",
1085: filename, linenum);
1086: cpptr[(*uintptr)++] = xstrdup(arg);
1087: }
1088: }
1089: return 0;
1.17 markus 1090:
1091: case oUserKnownHostsFile:
1.193 djm 1092: cpptr = (char **)&options->user_hostfiles;
1093: uintptr = &options->num_user_hostfiles;
1094: max_entries = SSH_MAX_HOSTS_FILES;
1095: goto parse_char_array;
1.27 markus 1096:
1.17 markus 1097: case oHostName:
1098: charptr = &options->hostname;
1099: goto parse_string;
1100:
1.52 markus 1101: case oHostKeyAlias:
1102: charptr = &options->host_key_alias;
1103: goto parse_string;
1104:
1.67 markus 1105: case oPreferredAuthentications:
1106: charptr = &options->preferred_authentications;
1107: goto parse_string;
1108:
1.77 markus 1109: case oBindAddress:
1110: charptr = &options->bind_address;
1111: goto parse_string;
1112:
1.183 markus 1113: case oPKCS11Provider:
1114: charptr = &options->pkcs11_provider;
1.86 markus 1115: goto parse_string;
1.85 jakob 1116:
1.17 markus 1117: case oProxyCommand:
1.144 reyk 1118: charptr = &options->proxy_command;
1.257 djm 1119: /* Ignore ProxyCommand if ProxyJump already specified */
1120: if (options->jump_host != NULL)
1121: charptr = &options->jump_host; /* Skip below */
1.144 reyk 1122: parse_command:
1.113 markus 1123: if (s == NULL)
1124: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 1125: len = strspn(s, WHITESPACE "=");
1.17 markus 1126: if (*activep && *charptr == NULL)
1.102 markus 1127: *charptr = xstrdup(s + len);
1.17 markus 1128: return 0;
1129:
1.257 djm 1130: case oProxyJump:
1131: if (s == NULL) {
1132: fatal("%.200s line %d: Missing argument.",
1133: filename, linenum);
1134: }
1135: len = strspn(s, WHITESPACE "=");
1136: if (parse_jump(s + len, options, *activep) == -1) {
1137: fatal("%.200s line %d: Invalid ProxyJump \"%s\"",
1138: filename, linenum, s + len);
1139: }
1140: return 0;
1141:
1.17 markus 1142: case oPort:
1143: intptr = &options->port;
1144: parse_int:
1.42 provos 1145: arg = strdelim(&s);
1.40 ho 1146: if (!arg || *arg == '\0')
1.17 markus 1147: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1148: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 1149: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 1150:
1151: /* Octal, decimal, or hex format? */
1.38 provos 1152: value = strtol(arg, &endofnumber, 0);
1153: if (arg == endofnumber)
1.21 markus 1154: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 1155: if (*activep && *intptr == -1)
1156: *intptr = value;
1157: break;
1158:
1159: case oConnectionAttempts:
1160: intptr = &options->connection_attempts;
1161: goto parse_int;
1162:
1163: case oCipher:
1164: intptr = &options->cipher;
1.42 provos 1165: arg = strdelim(&s);
1.40 ho 1166: if (!arg || *arg == '\0')
1.32 markus 1167: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1168: value = cipher_number(arg);
1.17 markus 1169: if (value == -1)
1170: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 1171: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 1172: if (*activep && *intptr == -1)
1173: *intptr = value;
1174: break;
1175:
1.25 markus 1176: case oCiphers:
1.42 provos 1177: arg = strdelim(&s);
1.40 ho 1178: if (!arg || *arg == '\0')
1.32 markus 1179: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1180: if (*arg != '-' && !ciphers_valid(*arg == '+' ? arg + 1 : arg))
1.31 markus 1181: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1182: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1183: if (*activep && options->ciphers == NULL)
1.38 provos 1184: options->ciphers = xstrdup(arg);
1.25 markus 1185: break;
1186:
1.62 markus 1187: case oMacs:
1188: arg = strdelim(&s);
1189: if (!arg || *arg == '\0')
1190: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.268 djm 1191: if (*arg != '-' && !mac_valid(*arg == '+' ? arg + 1 : arg))
1.62 markus 1192: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1193: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1194: if (*activep && options->macs == NULL)
1195: options->macs = xstrdup(arg);
1196: break;
1197:
1.189 djm 1198: case oKexAlgorithms:
1199: arg = strdelim(&s);
1200: if (!arg || *arg == '\0')
1201: fatal("%.200s line %d: Missing argument.",
1202: filename, linenum);
1.268 djm 1203: if (*arg != '-' &&
1204: !kex_names_valid(*arg == '+' ? arg + 1 : arg))
1.189 djm 1205: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1206: filename, linenum, arg ? arg : "<NONE>");
1207: if (*activep && options->kex_algorithms == NULL)
1208: options->kex_algorithms = xstrdup(arg);
1209: break;
1210:
1.76 markus 1211: case oHostKeyAlgorithms:
1.238 markus 1212: charptr = &options->hostkeyalgorithms;
1213: parse_keytypes:
1.76 markus 1214: arg = strdelim(&s);
1215: if (!arg || *arg == '\0')
1.238 markus 1216: fatal("%.200s line %d: Missing argument.",
1217: filename, linenum);
1.268 djm 1218: if (*arg != '-' &&
1219: !sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1))
1.238 markus 1220: fatal("%s line %d: Bad key types '%s'.",
1221: filename, linenum, arg ? arg : "<NONE>");
1222: if (*activep && *charptr == NULL)
1223: *charptr = xstrdup(arg);
1.76 markus 1224: break;
1225:
1.17 markus 1226: case oLogLevel:
1.164 dtucker 1227: log_level_ptr = &options->log_level;
1.42 provos 1228: arg = strdelim(&s);
1.38 provos 1229: value = log_level_number(arg);
1.95 markus 1230: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1231: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1232: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1233: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1234: *log_level_ptr = (LogLevel) value;
1.17 markus 1235: break;
1236:
1.271 dtucker 1237: case oLogFacility:
1238: log_facility_ptr = &options->log_facility;
1239: arg = strdelim(&s);
1240: value = log_facility_number(arg);
1241: if (value == SYSLOG_FACILITY_NOT_SET)
1242: fatal("%.200s line %d: unsupported log facility '%s'",
1243: filename, linenum, arg ? arg : "<NONE>");
1244: if (*log_facility_ptr == -1)
1245: *log_facility_ptr = (SyslogFacility) value;
1246: break;
1247:
1.88 stevesk 1248: case oLocalForward:
1.17 markus 1249: case oRemoteForward:
1.168 stevesk 1250: case oDynamicForward:
1.42 provos 1251: arg = strdelim(&s);
1.135 djm 1252: if (arg == NULL || *arg == '\0')
1.88 stevesk 1253: fatal("%.200s line %d: Missing port argument.",
1254: filename, linenum);
1.135 djm 1255:
1.168 stevesk 1256: if (opcode == oLocalForward ||
1257: opcode == oRemoteForward) {
1258: arg2 = strdelim(&s);
1259: if (arg2 == NULL || *arg2 == '\0')
1260: fatal("%.200s line %d: Missing target argument.",
1261: filename, linenum);
1.135 djm 1262:
1.168 stevesk 1263: /* construct a string for parse_forward */
1264: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1265: } else if (opcode == oDynamicForward) {
1266: strlcpy(fwdarg, arg, sizeof(fwdarg));
1267: }
1268:
1269: if (parse_forward(&fwd, fwdarg,
1.176 djm 1270: opcode == oDynamicForward ? 1 : 0,
1271: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1272: fatal("%.200s line %d: Bad forwarding specification.",
1273: filename, linenum);
1.135 djm 1274:
1.88 stevesk 1275: if (*activep) {
1.168 stevesk 1276: if (opcode == oLocalForward ||
1277: opcode == oDynamicForward)
1.135 djm 1278: add_local_forward(options, &fwd);
1.88 stevesk 1279: else if (opcode == oRemoteForward)
1.135 djm 1280: add_remote_forward(options, &fwd);
1.88 stevesk 1281: }
1.17 markus 1282: break;
1.71 markus 1283:
1.90 stevesk 1284: case oClearAllForwardings:
1285: intptr = &options->clear_forwardings;
1286: goto parse_flag;
1287:
1.17 markus 1288: case oHost:
1.206 djm 1289: if (cmdline)
1290: fatal("Host directive not supported as a command-line "
1291: "option");
1.17 markus 1292: *activep = 0;
1.191 djm 1293: arg2 = NULL;
1294: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.252 djm 1295: if ((flags & SSHCONF_NEVERMATCH) != 0)
1296: break;
1.191 djm 1297: negated = *arg == '!';
1298: if (negated)
1299: arg++;
1.38 provos 1300: if (match_pattern(host, arg)) {
1.191 djm 1301: if (negated) {
1302: debug("%.200s line %d: Skipping Host "
1303: "block because of negated match "
1304: "for %.100s", filename, linenum,
1305: arg);
1306: *activep = 0;
1307: break;
1308: }
1309: if (!*activep)
1310: arg2 = arg; /* logged below */
1.17 markus 1311: *activep = 1;
1312: }
1.191 djm 1313: }
1314: if (*activep)
1315: debug("%.200s line %d: Applying options for %.100s",
1316: filename, linenum, arg2);
1.42 provos 1317: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1318: return 0;
1319:
1.206 djm 1320: case oMatch:
1321: if (cmdline)
1322: fatal("Host directive not supported as a command-line "
1323: "option");
1.221 djm 1324: value = match_cfg_line(options, &s, pw, host, original_host,
1325: flags & SSHCONF_POSTCANON, filename, linenum);
1.206 djm 1326: if (value < 0)
1327: fatal("%.200s line %d: Bad Match condition", filename,
1328: linenum);
1.252 djm 1329: *activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
1.206 djm 1330: break;
1331:
1.17 markus 1332: case oEscapeChar:
1333: intptr = &options->escape_char;
1.42 provos 1334: arg = strdelim(&s);
1.40 ho 1335: if (!arg || *arg == '\0')
1.17 markus 1336: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.236 djm 1337: if (strcmp(arg, "none") == 0)
1338: value = SSH_ESCAPECHAR_NONE;
1339: else if (arg[1] == '\0')
1340: value = (u_char) arg[0];
1341: else if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1342: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1343: value = (u_char) arg[1] & 31;
1.17 markus 1344: else {
1345: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1346: filename, linenum);
1.17 markus 1347: /* NOTREACHED */
1348: value = 0; /* Avoid compiler warning. */
1349: }
1350: if (*activep && *intptr == -1)
1351: *intptr = value;
1.112 djm 1352: break;
1353:
1354: case oAddressFamily:
1.114 djm 1355: intptr = &options->address_family;
1.207 djm 1356: multistate_ptr = multistate_addressfamily;
1357: goto parse_multistate;
1.17 markus 1358:
1.101 markus 1359: case oEnableSSHKeysign:
1360: intptr = &options->enable_ssh_keysign;
1361: goto parse_flag;
1362:
1.128 markus 1363: case oIdentitiesOnly:
1364: intptr = &options->identities_only;
1365: goto parse_flag;
1366:
1.127 markus 1367: case oServerAliveInterval:
1368: intptr = &options->server_alive_interval;
1369: goto parse_time;
1370:
1371: case oServerAliveCountMax:
1372: intptr = &options->server_alive_count_max;
1373: goto parse_int;
1374:
1.130 djm 1375: case oSendEnv:
1376: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1377: if (strchr(arg, '=') != NULL)
1378: fatal("%s line %d: Invalid environment name.",
1379: filename, linenum);
1.137 djm 1380: if (!*activep)
1381: continue;
1.130 djm 1382: if (options->num_send_env >= MAX_SEND_ENV)
1383: fatal("%s line %d: too many send env.",
1384: filename, linenum);
1385: options->send_env[options->num_send_env++] =
1386: xstrdup(arg);
1387: }
1388: break;
1389:
1.132 djm 1390: case oControlPath:
1391: charptr = &options->control_path;
1392: goto parse_string;
1393:
1394: case oControlMaster:
1395: intptr = &options->control_master;
1.207 djm 1396: multistate_ptr = multistate_controlmaster;
1397: goto parse_multistate;
1.132 djm 1398:
1.187 djm 1399: case oControlPersist:
1400: /* no/false/yes/true, or a time spec */
1401: intptr = &options->control_persist;
1402: arg = strdelim(&s);
1403: if (!arg || *arg == '\0')
1404: fatal("%.200s line %d: Missing ControlPersist"
1405: " argument.", filename, linenum);
1406: value = 0;
1407: value2 = 0; /* timeout */
1408: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1409: value = 0;
1410: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1411: value = 1;
1412: else if ((value2 = convtime(arg)) >= 0)
1413: value = 1;
1414: else
1415: fatal("%.200s line %d: Bad ControlPersist argument.",
1416: filename, linenum);
1417: if (*activep && *intptr == -1) {
1418: *intptr = value;
1419: options->control_persist_timeout = value2;
1420: }
1421: break;
1422:
1.136 djm 1423: case oHashKnownHosts:
1424: intptr = &options->hash_known_hosts;
1425: goto parse_flag;
1426:
1.144 reyk 1427: case oTunnel:
1428: intptr = &options->tun_open;
1.207 djm 1429: multistate_ptr = multistate_tunnel;
1430: goto parse_multistate;
1.144 reyk 1431:
1432: case oTunnelDevice:
1433: arg = strdelim(&s);
1434: if (!arg || *arg == '\0')
1435: fatal("%.200s line %d: Missing argument.", filename, linenum);
1436: value = a2tun(arg, &value2);
1.145 reyk 1437: if (value == SSH_TUNID_ERR)
1.144 reyk 1438: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1439: if (*activep) {
1440: options->tun_local = value;
1441: options->tun_remote = value2;
1442: }
1443: break;
1444:
1445: case oLocalCommand:
1446: charptr = &options->local_command;
1447: goto parse_command;
1448:
1449: case oPermitLocalCommand:
1450: intptr = &options->permit_local_command;
1451: goto parse_flag;
1452:
1.167 grunk 1453: case oVisualHostKey:
1454: intptr = &options->visual_host_key;
1455: goto parse_flag;
1456:
1.252 djm 1457: case oInclude:
1458: if (cmdline)
1459: fatal("Include directive not supported as a "
1460: "command-line option");
1461: value = 0;
1462: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1463: /*
1464: * Ensure all paths are anchored. User configuration
1465: * files may begin with '~/' but system configurations
1466: * must not. If the path is relative, then treat it
1467: * as living in ~/.ssh for user configurations or
1468: * /etc/ssh for system ones.
1469: */
1470: if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0)
1471: fatal("%.200s line %d: bad include path %s.",
1472: filename, linenum, arg);
1473: if (*arg != '/' && *arg != '~') {
1474: xasprintf(&arg2, "%s/%s",
1475: (flags & SSHCONF_USERCONF) ?
1476: "~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
1477: } else
1478: arg2 = xstrdup(arg);
1479: memset(&gl, 0, sizeof(gl));
1480: r = glob(arg2, GLOB_TILDE, NULL, &gl);
1481: if (r == GLOB_NOMATCH) {
1482: debug("%.200s line %d: include %s matched no "
1483: "files",filename, linenum, arg2);
1.269 dtucker 1484: free(arg2);
1.252 djm 1485: continue;
1486: } else if (r != 0 || gl.gl_pathc < 0)
1487: fatal("%.200s line %d: glob failed for %s.",
1488: filename, linenum, arg2);
1489: free(arg2);
1490: oactive = *activep;
1491: for (i = 0; i < (u_int)gl.gl_pathc; i++) {
1492: debug3("%.200s line %d: Including file %s "
1493: "depth %d%s", filename, linenum,
1494: gl.gl_pathv[i], depth,
1495: oactive ? "" : " (parse only)");
1496: r = read_config_file_depth(gl.gl_pathv[i],
1497: pw, host, original_host, options,
1498: flags | SSHCONF_CHECKPERM |
1499: (oactive ? 0 : SSHCONF_NEVERMATCH),
1500: activep, depth + 1);
1.264 djm 1501: if (r != 1 && errno != ENOENT) {
1.263 djm 1502: fatal("Can't open user config file "
1503: "%.100s: %.100s", gl.gl_pathv[i],
1504: strerror(errno));
1505: }
1.252 djm 1506: /*
1507: * don't let Match in includes clobber the
1508: * containing file's Match state.
1509: */
1510: *activep = oactive;
1511: if (r != 1)
1512: value = -1;
1513: }
1514: globfree(&gl);
1515: }
1516: if (value != 0)
1517: return value;
1518: break;
1519:
1.190 djm 1520: case oIPQoS:
1521: arg = strdelim(&s);
1522: if ((value = parse_ipqos(arg)) == -1)
1523: fatal("%s line %d: Bad IPQoS value: %s",
1524: filename, linenum, arg);
1525: arg = strdelim(&s);
1526: if (arg == NULL)
1527: value2 = value;
1528: else if ((value2 = parse_ipqos(arg)) == -1)
1529: fatal("%s line %d: Bad IPQoS value: %s",
1530: filename, linenum, arg);
1531: if (*activep) {
1532: options->ip_qos_interactive = value;
1533: options->ip_qos_bulk = value2;
1534: }
1535: break;
1536:
1.192 djm 1537: case oRequestTTY:
1538: intptr = &options->request_tty;
1.207 djm 1539: multistate_ptr = multistate_requesttty;
1540: goto parse_multistate;
1.192 djm 1541:
1.199 djm 1542: case oIgnoreUnknown:
1543: charptr = &options->ignored_unknown;
1544: goto parse_string;
1545:
1.205 djm 1546: case oProxyUseFdpass:
1547: intptr = &options->proxy_use_fdpass;
1548: goto parse_flag;
1549:
1.208 djm 1550: case oCanonicalDomains:
1551: value = options->num_canonical_domains != 0;
1552: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1553: valid_domain(arg, filename, linenum);
1554: if (!*activep || value)
1555: continue;
1556: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1557: fatal("%s line %d: too many hostname suffixes.",
1558: filename, linenum);
1559: options->canonical_domains[
1560: options->num_canonical_domains++] = xstrdup(arg);
1561: }
1562: break;
1563:
1.209 djm 1564: case oCanonicalizePermittedCNAMEs:
1.208 djm 1565: value = options->num_permitted_cnames != 0;
1566: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1567: /* Either '*' for everything or 'list:list' */
1568: if (strcmp(arg, "*") == 0)
1569: arg2 = arg;
1570: else {
1571: lowercase(arg);
1572: if ((arg2 = strchr(arg, ':')) == NULL ||
1573: arg2[1] == '\0') {
1574: fatal("%s line %d: "
1575: "Invalid permitted CNAME \"%s\"",
1576: filename, linenum, arg);
1577: }
1578: *arg2 = '\0';
1579: arg2++;
1580: }
1581: if (!*activep || value)
1582: continue;
1583: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1584: fatal("%s line %d: too many permitted CNAMEs.",
1585: filename, linenum);
1586: cname = options->permitted_cnames +
1587: options->num_permitted_cnames++;
1588: cname->source_list = xstrdup(arg);
1589: cname->target_list = xstrdup(arg2);
1590: }
1591: break;
1592:
1.209 djm 1593: case oCanonicalizeHostname:
1594: intptr = &options->canonicalize_hostname;
1595: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1596: goto parse_multistate;
1597:
1.209 djm 1598: case oCanonicalizeMaxDots:
1599: intptr = &options->canonicalize_max_dots;
1.208 djm 1600: goto parse_int;
1601:
1.209 djm 1602: case oCanonicalizeFallbackLocal:
1603: intptr = &options->canonicalize_fallback_local;
1.208 djm 1604: goto parse_flag;
1605:
1.220 millert 1606: case oStreamLocalBindMask:
1607: arg = strdelim(&s);
1608: if (!arg || *arg == '\0')
1609: fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum);
1610: /* Parse mode in octal format */
1611: value = strtol(arg, &endofnumber, 8);
1612: if (arg == endofnumber || value < 0 || value > 0777)
1613: fatal("%.200s line %d: Bad mask.", filename, linenum);
1614: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
1615: break;
1616:
1617: case oStreamLocalBindUnlink:
1618: intptr = &options->fwd_opts.streamlocal_bind_unlink;
1619: goto parse_flag;
1620:
1.223 djm 1621: case oRevokedHostKeys:
1622: charptr = &options->revoked_host_keys;
1623: goto parse_string;
1624:
1.224 djm 1625: case oFingerprintHash:
1.225 djm 1626: intptr = &options->fingerprint_hash;
1.224 djm 1627: arg = strdelim(&s);
1628: if (!arg || *arg == '\0')
1629: fatal("%.200s line %d: Missing argument.",
1630: filename, linenum);
1631: if ((value = ssh_digest_alg_by_name(arg)) == -1)
1632: fatal("%.200s line %d: Invalid hash algorithm \"%s\".",
1633: filename, linenum, arg);
1.225 djm 1634: if (*activep && *intptr == -1)
1635: *intptr = value;
1.224 djm 1636: break;
1637:
1.229 djm 1638: case oUpdateHostkeys:
1639: intptr = &options->update_hostkeys;
1.232 djm 1640: multistate_ptr = multistate_yesnoask;
1641: goto parse_multistate;
1.229 djm 1642:
1.230 djm 1643: case oHostbasedKeyTypes:
1644: charptr = &options->hostbased_key_types;
1.238 markus 1645: goto parse_keytypes;
1646:
1647: case oPubkeyAcceptedKeyTypes:
1648: charptr = &options->pubkey_key_types;
1649: goto parse_keytypes;
1.230 djm 1650:
1.246 jcs 1651: case oAddKeysToAgent:
1652: intptr = &options->add_keys_to_agent;
1653: multistate_ptr = multistate_yesnoaskconfirm;
1654: goto parse_multistate;
1655:
1.253 markus 1656: case oIdentityAgent:
1657: charptr = &options->identity_agent;
1658: goto parse_string;
1659:
1.96 markus 1660: case oDeprecated:
1.98 markus 1661: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1662: filename, linenum, keyword);
1.98 markus 1663: return 0;
1.96 markus 1664:
1.110 jakob 1665: case oUnsupported:
1666: error("%s line %d: Unsupported option \"%s\"",
1667: filename, linenum, keyword);
1668: return 0;
1669:
1.17 markus 1670: default:
1.221 djm 1671: fatal("%s: Unimplemented opcode %d", __func__, opcode);
1.17 markus 1672: }
1673:
1674: /* Check that there is no garbage at end of line. */
1.57 djm 1675: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1676: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1677: filename, linenum, arg);
1.39 ho 1678: }
1.17 markus 1679: return 0;
1.1 deraadt 1680: }
1681:
1.19 markus 1682: /*
1683: * Reads the config file and modifies the options accordingly. Options
1684: * should already be initialized before this call. This never returns if
1.89 stevesk 1685: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1686: */
1.89 stevesk 1687: int
1.206 djm 1688: read_config_file(const char *filename, struct passwd *pw, const char *host,
1.221 djm 1689: const char *original_host, Options *options, int flags)
1.1 deraadt 1690: {
1.252 djm 1691: int active = 1;
1692:
1693: return read_config_file_depth(filename, pw, host, original_host,
1694: options, flags, &active, 0);
1695: }
1696:
1697: #define READCONF_MAX_DEPTH 16
1698: static int
1699: read_config_file_depth(const char *filename, struct passwd *pw,
1700: const char *host, const char *original_host, Options *options,
1701: int flags, int *activep, int depth)
1702: {
1.17 markus 1703: FILE *f;
1.270 djm 1704: char line[4096];
1.252 djm 1705: int linenum;
1.17 markus 1706: int bad_options = 0;
1707:
1.252 djm 1708: if (depth < 0 || depth > READCONF_MAX_DEPTH)
1709: fatal("Too many recursive configuration includes");
1710:
1.129 djm 1711: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1712: return 0;
1.129 djm 1713:
1.196 dtucker 1714: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1715: struct stat sb;
1.134 deraadt 1716:
1.131 dtucker 1717: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1718: fatal("fstat %s: %s", filename, strerror(errno));
1719: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1720: (sb.st_mode & 022) != 0))
1.129 djm 1721: fatal("Bad owner or permissions on %s", filename);
1722: }
1.17 markus 1723:
1724: debug("Reading configuration data %.200s", filename);
1725:
1.19 markus 1726: /*
1727: * Mark that we are now processing the options. This flag is turned
1728: * on/off by Host specifications.
1729: */
1.17 markus 1730: linenum = 0;
1731: while (fgets(line, sizeof(line), f)) {
1732: /* Update line number counter. */
1733: linenum++;
1.270 djm 1734: if (strlen(line) == sizeof(line) - 1)
1735: fatal("%s line %d too long", filename, linenum);
1.252 djm 1736: if (process_config_line_depth(options, pw, host, original_host,
1737: line, filename, linenum, activep, flags, depth) != 0)
1.17 markus 1738: bad_options++;
1739: }
1740: fclose(f);
1741: if (bad_options > 0)
1.64 millert 1742: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1743: filename, bad_options);
1.89 stevesk 1744: return 1;
1.1 deraadt 1745: }
1746:
1.218 djm 1747: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1748: int
1749: option_clear_or_none(const char *o)
1750: {
1751: return o == NULL || strcasecmp(o, "none") == 0;
1752: }
1753:
1.19 markus 1754: /*
1755: * Initializes options to special values that indicate that they have not yet
1756: * been set. Read_config_file will only set options with this value. Options
1757: * are processed in the following order: command line, user config file,
1758: * system config file. Last, fill_default_options is called.
1759: */
1.1 deraadt 1760:
1.26 markus 1761: void
1.17 markus 1762: initialize_options(Options * options)
1.1 deraadt 1763: {
1.17 markus 1764: memset(options, 'X', sizeof(*options));
1765: options->forward_agent = -1;
1766: options->forward_x11 = -1;
1.123 markus 1767: options->forward_x11_trusted = -1;
1.186 djm 1768: options->forward_x11_timeout = -1;
1.255 dtucker 1769: options->stdio_forward_host = NULL;
1770: options->stdio_forward_port = 0;
1.256 dtucker 1771: options->clear_forwardings = -1;
1.153 markus 1772: options->exit_on_forward_failure = -1;
1.34 markus 1773: options->xauth_location = NULL;
1.220 millert 1774: options->fwd_opts.gateway_ports = -1;
1775: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
1776: options->fwd_opts.streamlocal_bind_unlink = -1;
1.17 markus 1777: options->use_privileged_port = -1;
1778: options->rsa_authentication = -1;
1.50 markus 1779: options->pubkey_authentication = -1;
1.78 markus 1780: options->challenge_response_authentication = -1;
1.118 markus 1781: options->gss_authentication = -1;
1782: options->gss_deleg_creds = -1;
1.17 markus 1783: options->password_authentication = -1;
1.48 markus 1784: options->kbd_interactive_authentication = -1;
1785: options->kbd_interactive_devices = NULL;
1.17 markus 1786: options->rhosts_rsa_authentication = -1;
1.72 markus 1787: options->hostbased_authentication = -1;
1.17 markus 1788: options->batch_mode = -1;
1789: options->check_host_ip = -1;
1790: options->strict_host_key_checking = -1;
1791: options->compression = -1;
1.126 markus 1792: options->tcp_keep_alive = -1;
1.17 markus 1793: options->compression_level = -1;
1794: options->port = -1;
1.114 djm 1795: options->address_family = -1;
1.17 markus 1796: options->connection_attempts = -1;
1.111 djm 1797: options->connection_timeout = -1;
1.17 markus 1798: options->number_of_password_prompts = -1;
1799: options->cipher = -1;
1.25 markus 1800: options->ciphers = NULL;
1.62 markus 1801: options->macs = NULL;
1.189 djm 1802: options->kex_algorithms = NULL;
1.76 markus 1803: options->hostkeyalgorithms = NULL;
1.17 markus 1804: options->num_identity_files = 0;
1.241 djm 1805: options->num_certificate_files = 0;
1.17 markus 1806: options->hostname = NULL;
1.52 markus 1807: options->host_key_alias = NULL;
1.17 markus 1808: options->proxy_command = NULL;
1.257 djm 1809: options->jump_user = NULL;
1810: options->jump_host = NULL;
1811: options->jump_port = -1;
1812: options->jump_extra = NULL;
1.17 markus 1813: options->user = NULL;
1814: options->escape_char = -1;
1.193 djm 1815: options->num_system_hostfiles = 0;
1816: options->num_user_hostfiles = 0;
1.185 djm 1817: options->local_forwards = NULL;
1.17 markus 1818: options->num_local_forwards = 0;
1.185 djm 1819: options->remote_forwards = NULL;
1.17 markus 1820: options->num_remote_forwards = 0;
1.271 dtucker 1821: options->log_facility = SYSLOG_FACILITY_NOT_SET;
1.95 markus 1822: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1823: options->preferred_authentications = NULL;
1.77 markus 1824: options->bind_address = NULL;
1.183 markus 1825: options->pkcs11_provider = NULL;
1.101 markus 1826: options->enable_ssh_keysign = - 1;
1.91 markus 1827: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1828: options->identities_only = - 1;
1.105 markus 1829: options->rekey_limit = - 1;
1.198 dtucker 1830: options->rekey_interval = -1;
1.107 jakob 1831: options->verify_host_key_dns = -1;
1.127 markus 1832: options->server_alive_interval = -1;
1833: options->server_alive_count_max = -1;
1.130 djm 1834: options->num_send_env = 0;
1.132 djm 1835: options->control_path = NULL;
1836: options->control_master = -1;
1.187 djm 1837: options->control_persist = -1;
1838: options->control_persist_timeout = 0;
1.136 djm 1839: options->hash_known_hosts = -1;
1.144 reyk 1840: options->tun_open = -1;
1841: options->tun_local = -1;
1842: options->tun_remote = -1;
1843: options->local_command = NULL;
1844: options->permit_local_command = -1;
1.246 jcs 1845: options->add_keys_to_agent = -1;
1.253 markus 1846: options->identity_agent = NULL;
1.167 grunk 1847: options->visual_host_key = -1;
1.190 djm 1848: options->ip_qos_interactive = -1;
1849: options->ip_qos_bulk = -1;
1.192 djm 1850: options->request_tty = -1;
1.205 djm 1851: options->proxy_use_fdpass = -1;
1.199 djm 1852: options->ignored_unknown = NULL;
1.208 djm 1853: options->num_canonical_domains = 0;
1854: options->num_permitted_cnames = 0;
1.209 djm 1855: options->canonicalize_max_dots = -1;
1856: options->canonicalize_fallback_local = -1;
1857: options->canonicalize_hostname = -1;
1.223 djm 1858: options->revoked_host_keys = NULL;
1.224 djm 1859: options->fingerprint_hash = -1;
1.229 djm 1860: options->update_hostkeys = -1;
1.230 djm 1861: options->hostbased_key_types = NULL;
1.238 markus 1862: options->pubkey_key_types = NULL;
1.1 deraadt 1863: }
1864:
1.19 markus 1865: /*
1.218 djm 1866: * A petite version of fill_default_options() that just fills the options
1867: * needed for hostname canonicalization to proceed.
1868: */
1869: void
1870: fill_default_options_for_canonicalization(Options *options)
1871: {
1872: if (options->canonicalize_max_dots == -1)
1873: options->canonicalize_max_dots = 1;
1874: if (options->canonicalize_fallback_local == -1)
1875: options->canonicalize_fallback_local = 1;
1876: if (options->canonicalize_hostname == -1)
1877: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1878: }
1879:
1880: /*
1.19 markus 1881: * Called after processing other sources of option data, this fills those
1882: * options for which no value has been specified with their default values.
1883: */
1.26 markus 1884: void
1.17 markus 1885: fill_default_options(Options * options)
1.1 deraadt 1886: {
1.17 markus 1887: if (options->forward_agent == -1)
1.33 markus 1888: options->forward_agent = 0;
1.17 markus 1889: if (options->forward_x11 == -1)
1.23 markus 1890: options->forward_x11 = 0;
1.123 markus 1891: if (options->forward_x11_trusted == -1)
1892: options->forward_x11_trusted = 0;
1.186 djm 1893: if (options->forward_x11_timeout == -1)
1894: options->forward_x11_timeout = 1200;
1.256 dtucker 1895: /*
1896: * stdio forwarding (-W) changes the default for these but we defer
1897: * setting the values so they can be overridden.
1898: */
1.153 markus 1899: if (options->exit_on_forward_failure == -1)
1.256 dtucker 1900: options->exit_on_forward_failure =
1901: options->stdio_forward_host != NULL ? 1 : 0;
1902: if (options->clear_forwardings == -1)
1903: options->clear_forwardings =
1904: options->stdio_forward_host != NULL ? 1 : 0;
1905: if (options->clear_forwardings == 1)
1906: clear_forwardings(options);
1907:
1.34 markus 1908: if (options->xauth_location == NULL)
1.80 markus 1909: options->xauth_location = _PATH_XAUTH;
1.220 millert 1910: if (options->fwd_opts.gateway_ports == -1)
1911: options->fwd_opts.gateway_ports = 0;
1912: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
1913: options->fwd_opts.streamlocal_bind_mask = 0177;
1914: if (options->fwd_opts.streamlocal_bind_unlink == -1)
1915: options->fwd_opts.streamlocal_bind_unlink = 0;
1.17 markus 1916: if (options->use_privileged_port == -1)
1.65 markus 1917: options->use_privileged_port = 0;
1.17 markus 1918: if (options->rsa_authentication == -1)
1919: options->rsa_authentication = 1;
1.50 markus 1920: if (options->pubkey_authentication == -1)
1921: options->pubkey_authentication = 1;
1.78 markus 1922: if (options->challenge_response_authentication == -1)
1.83 markus 1923: options->challenge_response_authentication = 1;
1.118 markus 1924: if (options->gss_authentication == -1)
1.122 markus 1925: options->gss_authentication = 0;
1.118 markus 1926: if (options->gss_deleg_creds == -1)
1927: options->gss_deleg_creds = 0;
1.17 markus 1928: if (options->password_authentication == -1)
1929: options->password_authentication = 1;
1.48 markus 1930: if (options->kbd_interactive_authentication == -1)
1.59 markus 1931: options->kbd_interactive_authentication = 1;
1.17 markus 1932: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1933: options->rhosts_rsa_authentication = 0;
1.72 markus 1934: if (options->hostbased_authentication == -1)
1935: options->hostbased_authentication = 0;
1.17 markus 1936: if (options->batch_mode == -1)
1937: options->batch_mode = 0;
1938: if (options->check_host_ip == -1)
1939: options->check_host_ip = 1;
1940: if (options->strict_host_key_checking == -1)
1941: options->strict_host_key_checking = 2; /* 2 is default */
1942: if (options->compression == -1)
1943: options->compression = 0;
1.126 markus 1944: if (options->tcp_keep_alive == -1)
1945: options->tcp_keep_alive = 1;
1.17 markus 1946: if (options->compression_level == -1)
1947: options->compression_level = 6;
1948: if (options->port == -1)
1949: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1950: if (options->address_family == -1)
1951: options->address_family = AF_UNSPEC;
1.17 markus 1952: if (options->connection_attempts == -1)
1.84 markus 1953: options->connection_attempts = 1;
1.17 markus 1954: if (options->number_of_password_prompts == -1)
1955: options->number_of_password_prompts = 3;
1956: /* Selected in ssh_login(). */
1957: if (options->cipher == -1)
1958: options->cipher = SSH_CIPHER_NOT_SET;
1.76 markus 1959: /* options->hostkeyalgorithms, default set in myproposals.h */
1.246 jcs 1960: if (options->add_keys_to_agent == -1)
1961: options->add_keys_to_agent = 0;
1.17 markus 1962: if (options->num_identity_files == 0) {
1.273 ! djm 1963: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_RSA, 0);
! 1964: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_DSA, 0);
! 1965: add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_ECDSA, 0);
! 1966: add_identity_file(options, "~/",
! 1967: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.27 markus 1968: }
1.17 markus 1969: if (options->escape_char == -1)
1970: options->escape_char = '~';
1.193 djm 1971: if (options->num_system_hostfiles == 0) {
1972: options->system_hostfiles[options->num_system_hostfiles++] =
1973: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1974: options->system_hostfiles[options->num_system_hostfiles++] =
1975: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1976: }
1977: if (options->num_user_hostfiles == 0) {
1978: options->user_hostfiles[options->num_user_hostfiles++] =
1979: xstrdup(_PATH_SSH_USER_HOSTFILE);
1980: options->user_hostfiles[options->num_user_hostfiles++] =
1981: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1982: }
1.95 markus 1983: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1984: options->log_level = SYSLOG_LEVEL_INFO;
1.271 dtucker 1985: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1986: options->log_facility = SYSLOG_FACILITY_USER;
1.91 markus 1987: if (options->no_host_authentication_for_localhost == - 1)
1988: options->no_host_authentication_for_localhost = 0;
1.128 markus 1989: if (options->identities_only == -1)
1990: options->identities_only = 0;
1.101 markus 1991: if (options->enable_ssh_keysign == -1)
1992: options->enable_ssh_keysign = 0;
1.105 markus 1993: if (options->rekey_limit == -1)
1994: options->rekey_limit = 0;
1.198 dtucker 1995: if (options->rekey_interval == -1)
1996: options->rekey_interval = 0;
1.107 jakob 1997: if (options->verify_host_key_dns == -1)
1998: options->verify_host_key_dns = 0;
1.127 markus 1999: if (options->server_alive_interval == -1)
2000: options->server_alive_interval = 0;
2001: if (options->server_alive_count_max == -1)
2002: options->server_alive_count_max = 3;
1.132 djm 2003: if (options->control_master == -1)
2004: options->control_master = 0;
1.187 djm 2005: if (options->control_persist == -1) {
2006: options->control_persist = 0;
2007: options->control_persist_timeout = 0;
2008: }
1.136 djm 2009: if (options->hash_known_hosts == -1)
2010: options->hash_known_hosts = 0;
1.144 reyk 2011: if (options->tun_open == -1)
1.145 reyk 2012: options->tun_open = SSH_TUNMODE_NO;
2013: if (options->tun_local == -1)
2014: options->tun_local = SSH_TUNID_ANY;
2015: if (options->tun_remote == -1)
2016: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 2017: if (options->permit_local_command == -1)
2018: options->permit_local_command = 0;
1.167 grunk 2019: if (options->visual_host_key == -1)
2020: options->visual_host_key = 0;
1.190 djm 2021: if (options->ip_qos_interactive == -1)
2022: options->ip_qos_interactive = IPTOS_LOWDELAY;
2023: if (options->ip_qos_bulk == -1)
2024: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 2025: if (options->request_tty == -1)
2026: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 2027: if (options->proxy_use_fdpass == -1)
2028: options->proxy_use_fdpass = 0;
1.209 djm 2029: if (options->canonicalize_max_dots == -1)
2030: options->canonicalize_max_dots = 1;
2031: if (options->canonicalize_fallback_local == -1)
2032: options->canonicalize_fallback_local = 1;
2033: if (options->canonicalize_hostname == -1)
2034: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.224 djm 2035: if (options->fingerprint_hash == -1)
2036: options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.229 djm 2037: if (options->update_hostkeys == -1)
1.231 djm 2038: options->update_hostkeys = 0;
1.239 djm 2039: if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 ||
2040: kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 ||
2041: kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 ||
2042: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2043: &options->hostbased_key_types) != 0 ||
2044: kex_assemble_names(KEX_DEFAULT_PK_ALG,
2045: &options->pubkey_key_types) != 0)
2046: fatal("%s: kex_assemble_names failed", __func__);
1.224 djm 2047:
1.207 djm 2048: #define CLEAR_ON_NONE(v) \
2049: do { \
1.218 djm 2050: if (option_clear_or_none(v)) { \
1.207 djm 2051: free(v); \
2052: v = NULL; \
2053: } \
2054: } while(0)
2055: CLEAR_ON_NONE(options->local_command);
2056: CLEAR_ON_NONE(options->proxy_command);
2057: CLEAR_ON_NONE(options->control_path);
1.223 djm 2058: CLEAR_ON_NONE(options->revoked_host_keys);
1.254 markus 2059: /* options->identity_agent distinguishes NULL from 'none' */
1.17 markus 2060: /* options->user will be set in the main program if appropriate */
2061: /* options->hostname will be set in the main program if appropriate */
1.52 markus 2062: /* options->host_key_alias should not be set by default */
1.67 markus 2063: /* options->preferred_authentications will be set in ssh */
1.135 djm 2064: }
2065:
1.220 millert 2066: struct fwdarg {
2067: char *arg;
2068: int ispath;
2069: };
2070:
2071: /*
2072: * parse_fwd_field
2073: * parses the next field in a port forwarding specification.
2074: * sets fwd to the parsed field and advances p past the colon
2075: * or sets it to NULL at end of string.
2076: * returns 0 on success, else non-zero.
2077: */
2078: static int
2079: parse_fwd_field(char **p, struct fwdarg *fwd)
2080: {
2081: char *ep, *cp = *p;
2082: int ispath = 0;
2083:
2084: if (*cp == '\0') {
2085: *p = NULL;
2086: return -1; /* end of string */
2087: }
2088:
2089: /*
2090: * A field escaped with square brackets is used literally.
2091: * XXX - allow ']' to be escaped via backslash?
2092: */
2093: if (*cp == '[') {
2094: /* find matching ']' */
2095: for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
2096: if (*ep == '/')
2097: ispath = 1;
2098: }
2099: /* no matching ']' or not at end of field. */
2100: if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
2101: return -1;
2102: /* NUL terminate the field and advance p past the colon */
2103: *ep++ = '\0';
2104: if (*ep != '\0')
2105: *ep++ = '\0';
2106: fwd->arg = cp + 1;
2107: fwd->ispath = ispath;
2108: *p = ep;
2109: return 0;
2110: }
2111:
2112: for (cp = *p; *cp != '\0'; cp++) {
2113: switch (*cp) {
2114: case '\\':
2115: memmove(cp, cp + 1, strlen(cp + 1) + 1);
1.237 djm 2116: if (*cp == '\0')
2117: return -1;
1.220 millert 2118: break;
2119: case '/':
2120: ispath = 1;
2121: break;
2122: case ':':
2123: *cp++ = '\0';
2124: goto done;
2125: }
2126: }
2127: done:
2128: fwd->arg = *p;
2129: fwd->ispath = ispath;
2130: *p = cp;
2131: return 0;
2132: }
2133:
1.135 djm 2134: /*
2135: * parse_forward
2136: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 2137: * dynamicfwd == 0
1.220 millert 2138: * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
2139: * listenpath:connectpath
1.168 stevesk 2140: * dynamicfwd == 1
2141: * [listenhost:]listenport
1.135 djm 2142: * returns number of arguments parsed or zero on error
2143: */
2144: int
1.220 millert 2145: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 2146: {
1.220 millert 2147: struct fwdarg fwdargs[4];
2148: char *p, *cp;
1.135 djm 2149: int i;
2150:
1.220 millert 2151: memset(fwd, 0, sizeof(*fwd));
2152: memset(fwdargs, 0, sizeof(fwdargs));
1.135 djm 2153:
2154: cp = p = xstrdup(fwdspec);
2155:
2156: /* skip leading spaces */
1.214 deraadt 2157: while (isspace((u_char)*cp))
1.135 djm 2158: cp++;
2159:
1.220 millert 2160: for (i = 0; i < 4; ++i) {
2161: if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.135 djm 2162: break;
1.220 millert 2163: }
1.135 djm 2164:
1.170 stevesk 2165: /* Check for trailing garbage */
1.220 millert 2166: if (cp != NULL && *cp != '\0') {
1.135 djm 2167: i = 0; /* failure */
1.220 millert 2168: }
1.135 djm 2169:
2170: switch (i) {
1.168 stevesk 2171: case 1:
1.220 millert 2172: if (fwdargs[0].ispath) {
2173: fwd->listen_path = xstrdup(fwdargs[0].arg);
2174: fwd->listen_port = PORT_STREAMLOCAL;
2175: } else {
2176: fwd->listen_host = NULL;
2177: fwd->listen_port = a2port(fwdargs[0].arg);
2178: }
1.168 stevesk 2179: fwd->connect_host = xstrdup("socks");
2180: break;
2181:
2182: case 2:
1.220 millert 2183: if (fwdargs[0].ispath && fwdargs[1].ispath) {
2184: fwd->listen_path = xstrdup(fwdargs[0].arg);
2185: fwd->listen_port = PORT_STREAMLOCAL;
2186: fwd->connect_path = xstrdup(fwdargs[1].arg);
2187: fwd->connect_port = PORT_STREAMLOCAL;
2188: } else if (fwdargs[1].ispath) {
2189: fwd->listen_host = NULL;
2190: fwd->listen_port = a2port(fwdargs[0].arg);
2191: fwd->connect_path = xstrdup(fwdargs[1].arg);
2192: fwd->connect_port = PORT_STREAMLOCAL;
2193: } else {
2194: fwd->listen_host = xstrdup(fwdargs[0].arg);
2195: fwd->listen_port = a2port(fwdargs[1].arg);
2196: fwd->connect_host = xstrdup("socks");
2197: }
1.168 stevesk 2198: break;
2199:
1.135 djm 2200: case 3:
1.220 millert 2201: if (fwdargs[0].ispath) {
2202: fwd->listen_path = xstrdup(fwdargs[0].arg);
2203: fwd->listen_port = PORT_STREAMLOCAL;
2204: fwd->connect_host = xstrdup(fwdargs[1].arg);
2205: fwd->connect_port = a2port(fwdargs[2].arg);
2206: } else if (fwdargs[2].ispath) {
2207: fwd->listen_host = xstrdup(fwdargs[0].arg);
2208: fwd->listen_port = a2port(fwdargs[1].arg);
2209: fwd->connect_path = xstrdup(fwdargs[2].arg);
2210: fwd->connect_port = PORT_STREAMLOCAL;
2211: } else {
2212: fwd->listen_host = NULL;
2213: fwd->listen_port = a2port(fwdargs[0].arg);
2214: fwd->connect_host = xstrdup(fwdargs[1].arg);
2215: fwd->connect_port = a2port(fwdargs[2].arg);
2216: }
1.135 djm 2217: break;
2218:
2219: case 4:
1.220 millert 2220: fwd->listen_host = xstrdup(fwdargs[0].arg);
2221: fwd->listen_port = a2port(fwdargs[1].arg);
2222: fwd->connect_host = xstrdup(fwdargs[2].arg);
2223: fwd->connect_port = a2port(fwdargs[3].arg);
1.135 djm 2224: break;
2225: default:
2226: i = 0; /* failure */
2227: }
2228:
1.202 djm 2229: free(p);
1.135 djm 2230:
1.168 stevesk 2231: if (dynamicfwd) {
2232: if (!(i == 1 || i == 2))
2233: goto fail_free;
2234: } else {
1.220 millert 2235: if (!(i == 3 || i == 4)) {
2236: if (fwd->connect_path == NULL &&
2237: fwd->listen_path == NULL)
2238: goto fail_free;
2239: }
2240: if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.168 stevesk 2241: goto fail_free;
2242: }
2243:
1.220 millert 2244: if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
2245: (!remotefwd && fwd->listen_port == 0))
1.135 djm 2246: goto fail_free;
2247: if (fwd->connect_host != NULL &&
2248: strlen(fwd->connect_host) >= NI_MAXHOST)
2249: goto fail_free;
1.220 millert 2250: /* XXX - if connecting to a remote socket, max sun len may not match this host */
2251: if (fwd->connect_path != NULL &&
2252: strlen(fwd->connect_path) >= PATH_MAX_SUN)
2253: goto fail_free;
1.176 djm 2254: if (fwd->listen_host != NULL &&
2255: strlen(fwd->listen_host) >= NI_MAXHOST)
2256: goto fail_free;
1.220 millert 2257: if (fwd->listen_path != NULL &&
2258: strlen(fwd->listen_path) >= PATH_MAX_SUN)
2259: goto fail_free;
1.135 djm 2260:
2261: return (i);
2262:
2263: fail_free:
1.202 djm 2264: free(fwd->connect_host);
2265: fwd->connect_host = NULL;
1.220 millert 2266: free(fwd->connect_path);
2267: fwd->connect_path = NULL;
1.202 djm 2268: free(fwd->listen_host);
2269: fwd->listen_host = NULL;
1.220 millert 2270: free(fwd->listen_path);
2271: fwd->listen_path = NULL;
1.135 djm 2272: return (0);
1.221 djm 2273: }
2274:
1.257 djm 2275: int
2276: parse_jump(const char *s, Options *o, int active)
2277: {
2278: char *orig, *sdup, *cp;
2279: char *host = NULL, *user = NULL;
1.258 naddy 2280: int ret = -1, port = -1, first;
1.257 djm 2281:
2282: active &= o->proxy_command == NULL && o->jump_host == NULL;
2283:
2284: orig = sdup = xstrdup(s);
1.258 naddy 2285: first = active;
1.259 djm 2286: do {
2287: if ((cp = strrchr(sdup, ',')) == NULL)
2288: cp = sdup; /* last */
2289: else
2290: *cp++ = '\0';
2291:
1.258 naddy 2292: if (first) {
1.257 djm 2293: /* First argument and configuration is active */
2294: if (parse_user_host_port(cp, &user, &host, &port) != 0)
2295: goto out;
2296: } else {
2297: /* Subsequent argument or inactive configuration */
2298: if (parse_user_host_port(cp, NULL, NULL, NULL) != 0)
2299: goto out;
2300: }
1.258 naddy 2301: first = 0; /* only check syntax for subsequent hosts */
1.259 djm 2302: } while (cp != sdup);
1.257 djm 2303: /* success */
1.258 naddy 2304: if (active) {
2305: o->jump_user = user;
2306: o->jump_host = host;
2307: o->jump_port = port;
2308: o->proxy_command = xstrdup("none");
2309: user = host = NULL;
1.259 djm 2310: if ((cp = strrchr(s, ',')) != NULL && cp != s) {
2311: o->jump_extra = xstrdup(s);
2312: o->jump_extra[cp - s] = '\0';
2313: }
1.258 naddy 2314: }
1.257 djm 2315: ret = 0;
2316: out:
1.258 naddy 2317: free(orig);
1.257 djm 2318: free(user);
2319: free(host);
2320: return ret;
2321: }
2322:
1.221 djm 2323: /* XXX the following is a near-vebatim copy from servconf.c; refactor */
2324: static const char *
2325: fmt_multistate_int(int val, const struct multistate *m)
2326: {
2327: u_int i;
2328:
2329: for (i = 0; m[i].key != NULL; i++) {
2330: if (m[i].value == val)
2331: return m[i].key;
2332: }
2333: return "UNKNOWN";
2334: }
2335:
2336: static const char *
2337: fmt_intarg(OpCodes code, int val)
2338: {
2339: if (val == -1)
2340: return "unset";
2341: switch (code) {
2342: case oAddressFamily:
2343: return fmt_multistate_int(val, multistate_addressfamily);
2344: case oVerifyHostKeyDNS:
2345: case oStrictHostKeyChecking:
1.232 djm 2346: case oUpdateHostkeys:
1.221 djm 2347: return fmt_multistate_int(val, multistate_yesnoask);
2348: case oControlMaster:
2349: return fmt_multistate_int(val, multistate_controlmaster);
2350: case oTunnel:
2351: return fmt_multistate_int(val, multistate_tunnel);
2352: case oRequestTTY:
2353: return fmt_multistate_int(val, multistate_requesttty);
2354: case oCanonicalizeHostname:
2355: return fmt_multistate_int(val, multistate_canonicalizehostname);
1.224 djm 2356: case oFingerprintHash:
2357: return ssh_digest_alg_name(val);
1.221 djm 2358: default:
2359: switch (val) {
2360: case 0:
2361: return "no";
2362: case 1:
2363: return "yes";
2364: default:
2365: return "UNKNOWN";
2366: }
2367: }
2368: }
2369:
2370: static const char *
2371: lookup_opcode_name(OpCodes code)
2372: {
2373: u_int i;
2374:
2375: for (i = 0; keywords[i].name != NULL; i++)
2376: if (keywords[i].opcode == code)
2377: return(keywords[i].name);
2378: return "UNKNOWN";
2379: }
2380:
2381: static void
2382: dump_cfg_int(OpCodes code, int val)
2383: {
2384: printf("%s %d\n", lookup_opcode_name(code), val);
2385: }
2386:
2387: static void
2388: dump_cfg_fmtint(OpCodes code, int val)
2389: {
2390: printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
2391: }
2392:
2393: static void
2394: dump_cfg_string(OpCodes code, const char *val)
2395: {
2396: if (val == NULL)
2397: return;
2398: printf("%s %s\n", lookup_opcode_name(code), val);
2399: }
2400:
2401: static void
2402: dump_cfg_strarray(OpCodes code, u_int count, char **vals)
2403: {
2404: u_int i;
2405:
2406: for (i = 0; i < count; i++)
2407: printf("%s %s\n", lookup_opcode_name(code), vals[i]);
2408: }
2409:
2410: static void
2411: dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
2412: {
2413: u_int i;
2414:
2415: printf("%s", lookup_opcode_name(code));
2416: for (i = 0; i < count; i++)
2417: printf(" %s", vals[i]);
2418: printf("\n");
2419: }
2420:
2421: static void
2422: dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
2423: {
2424: const struct Forward *fwd;
2425: u_int i;
2426:
2427: /* oDynamicForward */
2428: for (i = 0; i < count; i++) {
2429: fwd = &fwds[i];
1.265 djm 2430: if (code == oDynamicForward && fwd->connect_host != NULL &&
1.221 djm 2431: strcmp(fwd->connect_host, "socks") != 0)
2432: continue;
1.265 djm 2433: if (code == oLocalForward && fwd->connect_host != NULL &&
1.221 djm 2434: strcmp(fwd->connect_host, "socks") == 0)
2435: continue;
2436: printf("%s", lookup_opcode_name(code));
2437: if (fwd->listen_port == PORT_STREAMLOCAL)
2438: printf(" %s", fwd->listen_path);
2439: else if (fwd->listen_host == NULL)
2440: printf(" %d", fwd->listen_port);
2441: else {
2442: printf(" [%s]:%d",
2443: fwd->listen_host, fwd->listen_port);
2444: }
2445: if (code != oDynamicForward) {
2446: if (fwd->connect_port == PORT_STREAMLOCAL)
2447: printf(" %s", fwd->connect_path);
2448: else if (fwd->connect_host == NULL)
2449: printf(" %d", fwd->connect_port);
2450: else {
2451: printf(" [%s]:%d",
2452: fwd->connect_host, fwd->connect_port);
2453: }
2454: }
2455: printf("\n");
2456: }
2457: }
2458:
2459: void
2460: dump_client_config(Options *o, const char *host)
2461: {
2462: int i;
1.257 djm 2463: char buf[8];
1.221 djm 2464:
1.240 djm 2465: /* This is normally prepared in ssh_kex2 */
2466: if (kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->hostkeyalgorithms) != 0)
2467: fatal("%s: kex_assemble_names failed", __func__);
2468:
1.221 djm 2469: /* Most interesting options first: user, host, port */
2470: dump_cfg_string(oUser, o->user);
2471: dump_cfg_string(oHostName, host);
2472: dump_cfg_int(oPort, o->port);
2473:
2474: /* Flag options */
2475: dump_cfg_fmtint(oAddressFamily, o->address_family);
2476: dump_cfg_fmtint(oBatchMode, o->batch_mode);
2477: dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
2478: dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
2479: dump_cfg_fmtint(oChallengeResponseAuthentication, o->challenge_response_authentication);
2480: dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
2481: dump_cfg_fmtint(oCompression, o->compression);
2482: dump_cfg_fmtint(oControlMaster, o->control_master);
2483: dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
1.256 dtucker 2484: dump_cfg_fmtint(oClearAllForwardings, o->clear_forwardings);
1.221 djm 2485: dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
1.224 djm 2486: dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
1.221 djm 2487: dump_cfg_fmtint(oForwardAgent, o->forward_agent);
2488: dump_cfg_fmtint(oForwardX11, o->forward_x11);
2489: dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
2490: dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
2491: #ifdef GSSAPI
2492: dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
2493: dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
2494: #endif /* GSSAPI */
2495: dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
2496: dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
2497: dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
2498: dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
2499: dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
2500: dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
2501: dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
2502: dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
2503: dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
2504: dump_cfg_fmtint(oRequestTTY, o->request_tty);
1.266 djm 2505: #ifdef WITH_RSA1
1.221 djm 2506: dump_cfg_fmtint(oRhostsRSAAuthentication, o->rhosts_rsa_authentication);
2507: dump_cfg_fmtint(oRSAAuthentication, o->rsa_authentication);
1.266 djm 2508: #endif
1.221 djm 2509: dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
2510: dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
2511: dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
2512: dump_cfg_fmtint(oTunnel, o->tun_open);
2513: dump_cfg_fmtint(oUsePrivilegedPort, o->use_privileged_port);
2514: dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
2515: dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
1.229 djm 2516: dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
1.221 djm 2517:
2518: /* Integer options */
2519: dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
2520: dump_cfg_int(oConnectionAttempts, o->connection_attempts);
2521: dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
2522: dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
2523: dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
2524: dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
2525:
2526: /* String options */
2527: dump_cfg_string(oBindAddress, o->bind_address);
2528: dump_cfg_string(oCiphers, o->ciphers ? o->ciphers : KEX_CLIENT_ENCRYPT);
2529: dump_cfg_string(oControlPath, o->control_path);
1.240 djm 2530: dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
1.221 djm 2531: dump_cfg_string(oHostKeyAlias, o->host_key_alias);
1.230 djm 2532: dump_cfg_string(oHostbasedKeyTypes, o->hostbased_key_types);
1.253 markus 2533: dump_cfg_string(oIdentityAgent, o->identity_agent);
1.221 djm 2534: dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
2535: dump_cfg_string(oKexAlgorithms, o->kex_algorithms ? o->kex_algorithms : KEX_CLIENT_KEX);
2536: dump_cfg_string(oLocalCommand, o->local_command);
2537: dump_cfg_string(oLogLevel, log_level_name(o->log_level));
2538: dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC);
1.266 djm 2539: #ifdef ENABLE_PKCS11
1.221 djm 2540: dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
1.266 djm 2541: #endif
1.221 djm 2542: dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
1.242 djm 2543: dump_cfg_string(oPubkeyAcceptedKeyTypes, o->pubkey_key_types);
1.230 djm 2544: dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
1.221 djm 2545: dump_cfg_string(oXAuthLocation, o->xauth_location);
2546:
1.230 djm 2547: /* Forwards */
1.221 djm 2548: dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
2549: dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
2550: dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
2551:
2552: /* String array options */
2553: dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
2554: dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
2555: dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
2556: dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
2557: dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
2558:
2559: /* Special cases */
2560:
2561: /* oConnectTimeout */
2562: if (o->connection_timeout == -1)
2563: printf("connecttimeout none\n");
2564: else
2565: dump_cfg_int(oConnectTimeout, o->connection_timeout);
2566:
2567: /* oTunnelDevice */
2568: printf("tunneldevice");
2569: if (o->tun_local == SSH_TUNID_ANY)
2570: printf(" any");
2571: else
2572: printf(" %d", o->tun_local);
2573: if (o->tun_remote == SSH_TUNID_ANY)
2574: printf(":any");
2575: else
2576: printf(":%d", o->tun_remote);
2577: printf("\n");
2578:
2579: /* oCanonicalizePermittedCNAMEs */
2580: if ( o->num_permitted_cnames > 0) {
2581: printf("canonicalizePermittedcnames");
2582: for (i = 0; i < o->num_permitted_cnames; i++) {
2583: printf(" %s:%s", o->permitted_cnames[i].source_list,
2584: o->permitted_cnames[i].target_list);
2585: }
2586: printf("\n");
2587: }
2588:
2589: /* oCipher */
2590: if (o->cipher != SSH_CIPHER_NOT_SET)
2591: printf("Cipher %s\n", cipher_name(o->cipher));
2592:
2593: /* oControlPersist */
2594: if (o->control_persist == 0 || o->control_persist_timeout == 0)
2595: dump_cfg_fmtint(oControlPersist, o->control_persist);
2596: else
2597: dump_cfg_int(oControlPersist, o->control_persist_timeout);
2598:
2599: /* oEscapeChar */
2600: if (o->escape_char == SSH_ESCAPECHAR_NONE)
2601: printf("escapechar none\n");
2602: else {
1.257 djm 2603: vis(buf, o->escape_char, VIS_WHITE, 0);
2604: printf("escapechar %s\n", buf);
1.221 djm 2605: }
2606:
2607: /* oIPQoS */
2608: printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
2609: printf("%s\n", iptos2str(o->ip_qos_bulk));
2610:
2611: /* oRekeyLimit */
1.249 dtucker 2612: printf("rekeylimit %llu %d\n",
2613: (unsigned long long)o->rekey_limit, o->rekey_interval);
1.221 djm 2614:
2615: /* oStreamLocalBindMask */
2616: printf("streamlocalbindmask 0%o\n",
2617: o->fwd_opts.streamlocal_bind_mask);
1.257 djm 2618:
2619: /* oProxyCommand / oProxyJump */
2620: if (o->jump_host == NULL)
2621: dump_cfg_string(oProxyCommand, o->proxy_command);
2622: else {
2623: /* Check for numeric addresses */
2624: i = strchr(o->jump_host, ':') != NULL ||
2625: strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
2626: snprintf(buf, sizeof(buf), "%d", o->jump_port);
2627: printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
1.259 djm 2628: /* optional additional jump spec */
2629: o->jump_extra == NULL ? "" : o->jump_extra,
2630: o->jump_extra == NULL ? "" : ",",
1.257 djm 2631: /* optional user */
2632: o->jump_user == NULL ? "" : o->jump_user,
2633: o->jump_user == NULL ? "" : "@",
2634: /* opening [ if hostname is numeric */
2635: i ? "[" : "",
2636: /* mandatory hostname */
2637: o->jump_host,
2638: /* closing ] if hostname is numeric */
2639: i ? "]" : "",
2640: /* optional port number */
2641: o->jump_port <= 0 ? "" : ":",
1.259 djm 2642: o->jump_port <= 0 ? "" : buf);
1.257 djm 2643: }
1.1 deraadt 2644: }
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