Annotation of src/usr.bin/ssh/readconf.c, Revision 1.203
1.203 ! dtucker 1: /* $OpenBSD: readconf.c,v 1.202 2013/05/17 00:13:14 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>
18:
19: #include <netinet/in.h>
1.190 djm 20: #include <netinet/in_systm.h>
21: #include <netinet/ip.h>
1.148 stevesk 22:
23: #include <ctype.h>
1.154 stevesk 24: #include <errno.h>
1.155 stevesk 25: #include <netdb.h>
1.159 deraadt 26: #include <signal.h>
1.158 stevesk 27: #include <stdio.h>
1.157 stevesk 28: #include <string.h>
1.156 stevesk 29: #include <unistd.h>
1.200 dtucker 30: #include <util.h>
1.1 deraadt 31:
1.159 deraadt 32: #include "xmalloc.h"
1.1 deraadt 33: #include "ssh.h"
1.25 markus 34: #include "compat.h"
1.58 markus 35: #include "cipher.h"
1.55 markus 36: #include "pathnames.h"
1.58 markus 37: #include "log.h"
1.159 deraadt 38: #include "key.h"
1.58 markus 39: #include "readconf.h"
40: #include "match.h"
41: #include "misc.h"
1.159 deraadt 42: #include "buffer.h"
1.62 markus 43: #include "kex.h"
44: #include "mac.h"
1.1 deraadt 45:
46: /* Format of the configuration file:
47:
48: # Configuration data is parsed as follows:
49: # 1. command line options
50: # 2. user-specific file
51: # 3. system-wide file
52: # Any configuration value is only changed the first time it is set.
53: # Thus, host-specific definitions should be at the beginning of the
54: # configuration file, and defaults at the end.
55:
56: # Host-specific declarations. These may override anything above. A single
57: # host may match multiple declarations; these are processed in the order
58: # that they are given in.
59:
60: Host *.ngs.fi ngs.fi
1.96 markus 61: User foo
1.1 deraadt 62:
63: Host fake.com
64: HostName another.host.name.real.org
65: User blaah
66: Port 34289
67: ForwardX11 no
68: ForwardAgent no
69:
70: Host books.com
71: RemoteForward 9999 shadows.cs.hut.fi:9999
72: Cipher 3des
73:
74: Host fascist.blob.com
75: Port 23123
76: User tylonen
77: PasswordAuthentication no
78:
79: Host puukko.hut.fi
80: User t35124p
81: ProxyCommand ssh-proxy %h %p
82:
83: Host *.fr
1.96 markus 84: PublicKeyAuthentication no
1.1 deraadt 85:
86: Host *.su
87: Cipher none
88: PasswordAuthentication no
89:
1.144 reyk 90: Host vpn.fake.com
91: Tunnel yes
92: TunnelDevice 3
93:
1.1 deraadt 94: # Defaults for various options
95: Host *
96: ForwardAgent no
1.50 markus 97: ForwardX11 no
1.1 deraadt 98: PasswordAuthentication yes
99: RSAAuthentication yes
100: RhostsRSAAuthentication yes
101: StrictHostKeyChecking yes
1.126 markus 102: TcpKeepAlive no
1.1 deraadt 103: IdentityFile ~/.ssh/identity
104: Port 22
105: EscapeChar ~
106:
107: */
108:
109: /* Keyword tokens. */
110:
1.17 markus 111: typedef enum {
112: oBadOption,
1.186 djm 113: oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
114: oGatewayPorts, oExitOnForwardFailure,
1.100 deraadt 115: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 116: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 117: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
118: oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
119: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
120: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 121: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 122: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 123: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 124: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 125: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.183 markus 126: oHostKeyAlgorithms, oBindAddress, oPKCS11Provider,
1.96 markus 127: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 128: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 129: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 130: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.187 djm 131: oSendEnv, oControlPath, oControlMaster, oControlPersist,
132: oHashKnownHosts,
1.144 reyk 133: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.182 dtucker 134: oVisualHostKey, oUseRoaming, oZeroKnowledgePasswordAuthentication,
1.199 djm 135: oKexAlgorithms, oIPQoS, oRequestTTY, oIgnoreUnknown,
136: oIgnoredUnknownOption, oDeprecated, oUnsupported
1.1 deraadt 137: } OpCodes;
138:
139: /* Textual representations of the tokens. */
140:
1.17 markus 141: static struct {
142: const char *name;
143: OpCodes opcode;
144: } keywords[] = {
145: { "forwardagent", oForwardAgent },
146: { "forwardx11", oForwardX11 },
1.123 markus 147: { "forwardx11trusted", oForwardX11Trusted },
1.186 djm 148: { "forwardx11timeout", oForwardX11Timeout },
1.153 markus 149: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 150: { "xauthlocation", oXAuthLocation },
1.17 markus 151: { "gatewayports", oGatewayPorts },
152: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 153: { "rhostsauthentication", oDeprecated },
1.17 markus 154: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 155: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
156: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 157: { "rsaauthentication", oRSAAuthentication },
1.50 markus 158: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 159: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 160: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 161: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 162: { "challengeresponseauthentication", oChallengeResponseAuthentication },
163: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
164: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 165: { "kerberosauthentication", oUnsupported },
166: { "kerberostgtpassing", oUnsupported },
167: { "afstokenpassing", oUnsupported },
1.118 markus 168: #if defined(GSSAPI)
169: { "gssapiauthentication", oGssAuthentication },
170: { "gssapidelegatecredentials", oGssDelegateCreds },
171: #else
172: { "gssapiauthentication", oUnsupported },
173: { "gssapidelegatecredentials", oUnsupported },
174: #endif
1.96 markus 175: { "fallbacktorsh", oDeprecated },
176: { "usersh", oDeprecated },
1.17 markus 177: { "identityfile", oIdentityFile },
1.174 stevesk 178: { "identityfile2", oIdentityFile }, /* obsolete */
1.128 markus 179: { "identitiesonly", oIdentitiesOnly },
1.17 markus 180: { "hostname", oHostName },
1.52 markus 181: { "hostkeyalias", oHostKeyAlias },
1.17 markus 182: { "proxycommand", oProxyCommand },
183: { "port", oPort },
184: { "cipher", oCipher },
1.25 markus 185: { "ciphers", oCiphers },
1.62 markus 186: { "macs", oMacs },
1.25 markus 187: { "protocol", oProtocol },
1.17 markus 188: { "remoteforward", oRemoteForward },
189: { "localforward", oLocalForward },
190: { "user", oUser },
191: { "host", oHost },
192: { "escapechar", oEscapeChar },
193: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.193 djm 194: { "globalknownhostsfile2", oDeprecated },
1.174 stevesk 195: { "userknownhostsfile", oUserKnownHostsFile },
1.193 djm 196: { "userknownhostsfile2", oDeprecated },
1.17 markus 197: { "connectionattempts", oConnectionAttempts },
198: { "batchmode", oBatchMode },
199: { "checkhostip", oCheckHostIP },
200: { "stricthostkeychecking", oStrictHostKeyChecking },
201: { "compression", oCompression },
202: { "compressionlevel", oCompressionLevel },
1.126 markus 203: { "tcpkeepalive", oTCPKeepAlive },
204: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 205: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
206: { "loglevel", oLogLevel },
1.71 markus 207: { "dynamicforward", oDynamicForward },
1.67 markus 208: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 209: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 210: { "bindaddress", oBindAddress },
1.183 markus 211: #ifdef ENABLE_PKCS11
212: { "smartcarddevice", oPKCS11Provider },
213: { "pkcs11provider", oPKCS11Provider },
1.110 jakob 214: #else
215: { "smartcarddevice", oUnsupported },
1.183 markus 216: { "pkcs11provider", oUnsupported },
1.110 jakob 217: #endif
1.93 deraadt 218: { "clearallforwardings", oClearAllForwardings },
1.101 markus 219: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 220: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 221: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 222: { "rekeylimit", oRekeyLimit },
1.111 djm 223: { "connecttimeout", oConnectTimeout },
1.112 djm 224: { "addressfamily", oAddressFamily },
1.127 markus 225: { "serveraliveinterval", oServerAliveInterval },
226: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 227: { "sendenv", oSendEnv },
1.132 djm 228: { "controlpath", oControlPath },
229: { "controlmaster", oControlMaster },
1.187 djm 230: { "controlpersist", oControlPersist },
1.136 djm 231: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 232: { "tunnel", oTunnel },
233: { "tunneldevice", oTunnelDevice },
234: { "localcommand", oLocalCommand },
235: { "permitlocalcommand", oPermitLocalCommand },
1.167 grunk 236: { "visualhostkey", oVisualHostKey },
1.177 andreas 237: { "useroaming", oUseRoaming },
1.171 djm 238: #ifdef JPAKE
239: { "zeroknowledgepasswordauthentication",
240: oZeroKnowledgePasswordAuthentication },
241: #else
242: { "zeroknowledgepasswordauthentication", oUnsupported },
243: #endif
1.189 djm 244: { "kexalgorithms", oKexAlgorithms },
1.190 djm 245: { "ipqos", oIPQoS },
1.192 djm 246: { "requesttty", oRequestTTY },
1.199 djm 247: { "ignoreunknown", oIgnoreUnknown },
1.171 djm 248:
1.92 stevesk 249: { NULL, oBadOption }
1.13 markus 250: };
251:
1.19 markus 252: /*
253: * Adds a local TCP/IP port forward to options. Never returns if there is an
254: * error.
255: */
1.1 deraadt 256:
1.26 markus 257: void
1.135 djm 258: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 259: {
1.17 markus 260: Forward *fwd;
261: extern uid_t original_real_uid;
1.185 djm 262:
1.135 djm 263: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 264: fatal("Privileged ports can only be forwarded by root.");
1.185 djm 265: options->local_forwards = xrealloc(options->local_forwards,
266: options->num_local_forwards + 1,
267: sizeof(*options->local_forwards));
1.17 markus 268: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 269:
1.172 stevesk 270: fwd->listen_host = newfwd->listen_host;
1.135 djm 271: fwd->listen_port = newfwd->listen_port;
1.172 stevesk 272: fwd->connect_host = newfwd->connect_host;
1.135 djm 273: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 274: }
275:
1.19 markus 276: /*
277: * Adds a remote TCP/IP port forward to options. Never returns if there is
278: * an error.
279: */
1.1 deraadt 280:
1.26 markus 281: void
1.135 djm 282: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 283: {
1.17 markus 284: Forward *fwd;
1.185 djm 285:
286: options->remote_forwards = xrealloc(options->remote_forwards,
287: options->num_remote_forwards + 1,
288: sizeof(*options->remote_forwards));
1.17 markus 289: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 290:
1.172 stevesk 291: fwd->listen_host = newfwd->listen_host;
1.135 djm 292: fwd->listen_port = newfwd->listen_port;
1.172 stevesk 293: fwd->connect_host = newfwd->connect_host;
1.135 djm 294: fwd->connect_port = newfwd->connect_port;
1.194 markus 295: fwd->handle = newfwd->handle;
1.184 markus 296: fwd->allocated_port = 0;
1.1 deraadt 297: }
298:
1.90 stevesk 299: static void
300: clear_forwardings(Options *options)
301: {
302: int i;
303:
1.135 djm 304: for (i = 0; i < options->num_local_forwards; i++) {
1.202 djm 305: free(options->local_forwards[i].listen_host);
306: free(options->local_forwards[i].connect_host);
1.135 djm 307: }
1.185 djm 308: if (options->num_local_forwards > 0) {
1.202 djm 309: free(options->local_forwards);
1.185 djm 310: options->local_forwards = NULL;
311: }
1.90 stevesk 312: options->num_local_forwards = 0;
1.135 djm 313: for (i = 0; i < options->num_remote_forwards; i++) {
1.202 djm 314: free(options->remote_forwards[i].listen_host);
315: free(options->remote_forwards[i].connect_host);
1.135 djm 316: }
1.185 djm 317: if (options->num_remote_forwards > 0) {
1.202 djm 318: free(options->remote_forwards);
1.185 djm 319: options->remote_forwards = NULL;
320: }
1.90 stevesk 321: options->num_remote_forwards = 0;
1.145 reyk 322: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 323: }
324:
1.195 dtucker 325: void
326: add_identity_file(Options *options, const char *dir, const char *filename,
327: int userprovided)
328: {
329: char *path;
330:
331: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
332: fatal("Too many identity files specified (max %d)",
333: SSH_MAX_IDENTITY_FILES);
334:
335: if (dir == NULL) /* no dir, filename is absolute */
336: path = xstrdup(filename);
337: else
338: (void)xasprintf(&path, "%.100s%.100s", dir, filename);
339:
340: options->identity_file_userprovided[options->num_identity_files] =
341: userprovided;
342: options->identity_files[options->num_identity_files++] = path;
343: }
344:
1.19 markus 345: /*
1.70 stevesk 346: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 347: */
1.1 deraadt 348:
1.26 markus 349: static OpCodes
1.199 djm 350: parse_token(const char *cp, const char *filename, int linenum,
351: const char *ignored_unknown)
1.1 deraadt 352: {
1.199 djm 353: int i;
1.1 deraadt 354:
1.17 markus 355: for (i = 0; keywords[i].name; i++)
1.199 djm 356: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 357: return keywords[i].opcode;
1.199 djm 358: if (ignored_unknown != NULL && match_pattern_list(cp, ignored_unknown,
359: strlen(ignored_unknown), 1) == 1)
360: return oIgnoredUnknownOption;
1.75 stevesk 361: error("%s: line %d: Bad configuration option: %s",
362: filename, linenum, cp);
1.17 markus 363: return oBadOption;
1.1 deraadt 364: }
365:
1.19 markus 366: /*
367: * Processes a single option line as used in the configuration files. This
368: * only sets those values that have not already been set.
369: */
1.102 markus 370: #define WHITESPACE " \t\r\n"
1.1 deraadt 371:
1.14 markus 372: int
373: process_config_line(Options *options, const char *host,
1.17 markus 374: char *line, const char *filename, int linenum,
1.196 dtucker 375: int *activep, int userconfig)
1.1 deraadt 376: {
1.193 djm 377: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
378: char **cpptr, fwdarg[256];
1.199 djm 379: u_int i, *uintptr, max_entries = 0;
1.201 dtucker 380: int negated, opcode, *intptr, value, value2;
1.164 dtucker 381: LogLevel *log_level_ptr;
1.201 dtucker 382: long long val64;
1.102 markus 383: size_t len;
1.135 djm 384: Forward fwd;
1.106 djm 385:
386: /* Strip trailing whitespace */
1.139 deraadt 387: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 388: if (strchr(WHITESPACE, line[len]) == NULL)
389: break;
390: line[len] = '\0';
391: }
1.1 deraadt 392:
1.42 provos 393: s = line;
394: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 395: if ((keyword = strdelim(&s)) == NULL)
396: return 0;
1.42 provos 397: /* Ignore leading whitespace. */
398: if (*keyword == '\0')
1.43 markus 399: keyword = strdelim(&s);
1.56 deraadt 400: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 401: return 0;
1.199 djm 402: /* Match lowercase keyword */
403: for (i = 0; i < strlen(keyword); i++)
404: keyword[i] = tolower(keyword[i]);
1.17 markus 405:
1.199 djm 406: opcode = parse_token(keyword, filename, linenum,
407: options->ignored_unknown);
1.17 markus 408:
409: switch (opcode) {
410: case oBadOption:
1.19 markus 411: /* don't panic, but count bad options */
412: return -1;
1.17 markus 413: /* NOTREACHED */
1.199 djm 414: case oIgnoredUnknownOption:
415: debug("%s line %d: Ignored unknown option \"%s\"",
416: filename, linenum, keyword);
417: return 0;
1.111 djm 418: case oConnectTimeout:
419: intptr = &options->connection_timeout;
1.127 markus 420: parse_time:
1.111 djm 421: arg = strdelim(&s);
422: if (!arg || *arg == '\0')
423: fatal("%s line %d: missing time value.",
424: filename, linenum);
425: if ((value = convtime(arg)) == -1)
426: fatal("%s line %d: invalid time value.",
427: filename, linenum);
1.160 dtucker 428: if (*activep && *intptr == -1)
1.111 djm 429: *intptr = value;
430: break;
431:
1.17 markus 432: case oForwardAgent:
433: intptr = &options->forward_agent;
434: parse_flag:
1.42 provos 435: arg = strdelim(&s);
1.40 ho 436: if (!arg || *arg == '\0')
1.17 markus 437: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
438: value = 0; /* To avoid compiler warning... */
1.38 provos 439: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 440: value = 1;
1.38 provos 441: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 442: value = 0;
443: else
444: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
445: if (*activep && *intptr == -1)
446: *intptr = value;
447: break;
448:
449: case oForwardX11:
450: intptr = &options->forward_x11;
451: goto parse_flag;
452:
1.123 markus 453: case oForwardX11Trusted:
454: intptr = &options->forward_x11_trusted;
455: goto parse_flag;
1.186 djm 456:
457: case oForwardX11Timeout:
458: intptr = &options->forward_x11_timeout;
459: goto parse_time;
1.123 markus 460:
1.17 markus 461: case oGatewayPorts:
462: intptr = &options->gateway_ports;
463: goto parse_flag;
464:
1.153 markus 465: case oExitOnForwardFailure:
466: intptr = &options->exit_on_forward_failure;
467: goto parse_flag;
468:
1.17 markus 469: case oUsePrivilegedPort:
470: intptr = &options->use_privileged_port;
471: goto parse_flag;
472:
473: case oPasswordAuthentication:
474: intptr = &options->password_authentication;
475: goto parse_flag;
476:
1.171 djm 477: case oZeroKnowledgePasswordAuthentication:
478: intptr = &options->zero_knowledge_password_authentication;
479: goto parse_flag;
480:
1.48 markus 481: case oKbdInteractiveAuthentication:
482: intptr = &options->kbd_interactive_authentication;
483: goto parse_flag;
484:
485: case oKbdInteractiveDevices:
486: charptr = &options->kbd_interactive_devices;
487: goto parse_string;
488:
1.50 markus 489: case oPubkeyAuthentication:
490: intptr = &options->pubkey_authentication;
1.30 markus 491: goto parse_flag;
492:
1.17 markus 493: case oRSAAuthentication:
494: intptr = &options->rsa_authentication;
495: goto parse_flag;
496:
497: case oRhostsRSAAuthentication:
498: intptr = &options->rhosts_rsa_authentication;
499: goto parse_flag;
500:
1.72 markus 501: case oHostbasedAuthentication:
502: intptr = &options->hostbased_authentication;
503: goto parse_flag;
504:
1.59 markus 505: case oChallengeResponseAuthentication:
1.78 markus 506: intptr = &options->challenge_response_authentication;
1.17 markus 507: goto parse_flag;
1.108 jakob 508:
1.118 markus 509: case oGssAuthentication:
510: intptr = &options->gss_authentication;
511: goto parse_flag;
512:
513: case oGssDelegateCreds:
514: intptr = &options->gss_deleg_creds;
515: goto parse_flag;
516:
1.17 markus 517: case oBatchMode:
518: intptr = &options->batch_mode;
519: goto parse_flag;
520:
521: case oCheckHostIP:
522: intptr = &options->check_host_ip;
1.167 grunk 523: goto parse_flag;
1.17 markus 524:
1.107 jakob 525: case oVerifyHostKeyDNS:
526: intptr = &options->verify_host_key_dns;
1.125 jakob 527: goto parse_yesnoask;
1.107 jakob 528:
1.17 markus 529: case oStrictHostKeyChecking:
530: intptr = &options->strict_host_key_checking;
1.125 jakob 531: parse_yesnoask:
1.42 provos 532: arg = strdelim(&s);
1.40 ho 533: if (!arg || *arg == '\0')
1.60 stevesk 534: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 535: filename, linenum);
1.17 markus 536: value = 0; /* To avoid compiler warning... */
1.38 provos 537: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 538: value = 1;
1.38 provos 539: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 540: value = 0;
1.38 provos 541: else if (strcmp(arg, "ask") == 0)
1.17 markus 542: value = 2;
543: else
544: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
545: if (*activep && *intptr == -1)
546: *intptr = value;
547: break;
548:
549: case oCompression:
550: intptr = &options->compression;
551: goto parse_flag;
552:
1.126 markus 553: case oTCPKeepAlive:
554: intptr = &options->tcp_keep_alive;
1.17 markus 555: goto parse_flag;
556:
1.91 markus 557: case oNoHostAuthenticationForLocalhost:
558: intptr = &options->no_host_authentication_for_localhost;
559: goto parse_flag;
560:
1.17 markus 561: case oNumberOfPasswordPrompts:
562: intptr = &options->number_of_password_prompts;
563: goto parse_int;
564:
565: case oCompressionLevel:
566: intptr = &options->compression_level;
567: goto parse_int;
568:
1.105 markus 569: case oRekeyLimit:
570: arg = strdelim(&s);
571: if (!arg || *arg == '\0')
1.198 dtucker 572: fatal("%.200s line %d: Missing argument.", filename,
573: linenum);
574: if (strcmp(arg, "default") == 0) {
575: val64 = 0;
576: } else {
1.200 dtucker 577: if (scan_scaled(arg, &val64) == -1)
578: fatal("%.200s line %d: Bad number '%s': %s",
579: filename, linenum, arg, strerror(errno));
580: /* check for too-large or too-small limits */
581: if (val64 > UINT_MAX)
1.198 dtucker 582: fatal("%.200s line %d: RekeyLimit too large",
583: filename, linenum);
584: if (val64 != 0 && val64 < 16)
585: fatal("%.200s line %d: RekeyLimit too small",
586: filename, linenum);
1.105 markus 587: }
1.165 djm 588: if (*activep && options->rekey_limit == -1)
589: options->rekey_limit = (u_int32_t)val64;
1.198 dtucker 590: if (s != NULL) { /* optional rekey interval present */
591: if (strcmp(s, "none") == 0) {
592: (void)strdelim(&s); /* discard */
593: break;
594: }
595: intptr = &options->rekey_interval;
596: goto parse_time;
597: }
1.105 markus 598: break;
599:
1.17 markus 600: case oIdentityFile:
1.42 provos 601: arg = strdelim(&s);
1.40 ho 602: if (!arg || *arg == '\0')
1.17 markus 603: fatal("%.200s line %d: Missing argument.", filename, linenum);
604: if (*activep) {
1.50 markus 605: intptr = &options->num_identity_files;
1.27 markus 606: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 607: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 608: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.196 dtucker 609: add_identity_file(options, NULL, arg, userconfig);
1.17 markus 610: }
611: break;
612:
1.34 markus 613: case oXAuthLocation:
614: charptr=&options->xauth_location;
615: goto parse_string;
616:
1.17 markus 617: case oUser:
618: charptr = &options->user;
619: parse_string:
1.42 provos 620: arg = strdelim(&s);
1.40 ho 621: if (!arg || *arg == '\0')
1.193 djm 622: fatal("%.200s line %d: Missing argument.",
623: filename, linenum);
1.17 markus 624: if (*activep && *charptr == NULL)
1.38 provos 625: *charptr = xstrdup(arg);
1.17 markus 626: break;
627:
628: case oGlobalKnownHostsFile:
1.193 djm 629: cpptr = (char **)&options->system_hostfiles;
630: uintptr = &options->num_system_hostfiles;
631: max_entries = SSH_MAX_HOSTS_FILES;
632: parse_char_array:
633: if (*activep && *uintptr == 0) {
634: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
635: if ((*uintptr) >= max_entries)
636: fatal("%s line %d: "
637: "too many authorized keys files.",
638: filename, linenum);
639: cpptr[(*uintptr)++] = xstrdup(arg);
640: }
641: }
642: return 0;
1.17 markus 643:
644: case oUserKnownHostsFile:
1.193 djm 645: cpptr = (char **)&options->user_hostfiles;
646: uintptr = &options->num_user_hostfiles;
647: max_entries = SSH_MAX_HOSTS_FILES;
648: goto parse_char_array;
1.27 markus 649:
1.17 markus 650: case oHostName:
651: charptr = &options->hostname;
652: goto parse_string;
653:
1.52 markus 654: case oHostKeyAlias:
655: charptr = &options->host_key_alias;
656: goto parse_string;
657:
1.67 markus 658: case oPreferredAuthentications:
659: charptr = &options->preferred_authentications;
660: goto parse_string;
661:
1.77 markus 662: case oBindAddress:
663: charptr = &options->bind_address;
664: goto parse_string;
665:
1.183 markus 666: case oPKCS11Provider:
667: charptr = &options->pkcs11_provider;
1.86 markus 668: goto parse_string;
1.85 jakob 669:
1.17 markus 670: case oProxyCommand:
1.144 reyk 671: charptr = &options->proxy_command;
672: parse_command:
1.113 markus 673: if (s == NULL)
674: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 675: len = strspn(s, WHITESPACE "=");
1.17 markus 676: if (*activep && *charptr == NULL)
1.102 markus 677: *charptr = xstrdup(s + len);
1.17 markus 678: return 0;
679:
680: case oPort:
681: intptr = &options->port;
682: parse_int:
1.42 provos 683: arg = strdelim(&s);
1.40 ho 684: if (!arg || *arg == '\0')
1.17 markus 685: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 686: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 687: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 688:
689: /* Octal, decimal, or hex format? */
1.38 provos 690: value = strtol(arg, &endofnumber, 0);
691: if (arg == endofnumber)
1.21 markus 692: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 693: if (*activep && *intptr == -1)
694: *intptr = value;
695: break;
696:
697: case oConnectionAttempts:
698: intptr = &options->connection_attempts;
699: goto parse_int;
700:
701: case oCipher:
702: intptr = &options->cipher;
1.42 provos 703: arg = strdelim(&s);
1.40 ho 704: if (!arg || *arg == '\0')
1.32 markus 705: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 706: value = cipher_number(arg);
1.17 markus 707: if (value == -1)
708: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 709: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 710: if (*activep && *intptr == -1)
711: *intptr = value;
712: break;
713:
1.25 markus 714: case oCiphers:
1.42 provos 715: arg = strdelim(&s);
1.40 ho 716: if (!arg || *arg == '\0')
1.32 markus 717: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 718: if (!ciphers_valid(arg))
1.31 markus 719: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 720: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 721: if (*activep && options->ciphers == NULL)
1.38 provos 722: options->ciphers = xstrdup(arg);
1.25 markus 723: break;
724:
1.62 markus 725: case oMacs:
726: arg = strdelim(&s);
727: if (!arg || *arg == '\0')
728: fatal("%.200s line %d: Missing argument.", filename, linenum);
729: if (!mac_valid(arg))
730: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 731: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 732: if (*activep && options->macs == NULL)
733: options->macs = xstrdup(arg);
734: break;
735:
1.189 djm 736: case oKexAlgorithms:
737: arg = strdelim(&s);
738: if (!arg || *arg == '\0')
739: fatal("%.200s line %d: Missing argument.",
740: filename, linenum);
741: if (!kex_names_valid(arg))
742: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
743: filename, linenum, arg ? arg : "<NONE>");
744: if (*activep && options->kex_algorithms == NULL)
745: options->kex_algorithms = xstrdup(arg);
746: break;
747:
1.76 markus 748: case oHostKeyAlgorithms:
749: arg = strdelim(&s);
750: if (!arg || *arg == '\0')
751: fatal("%.200s line %d: Missing argument.", filename, linenum);
752: if (!key_names_valid2(arg))
753: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 754: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 755: if (*activep && options->hostkeyalgorithms == NULL)
756: options->hostkeyalgorithms = xstrdup(arg);
757: break;
758:
1.25 markus 759: case oProtocol:
760: intptr = &options->protocol;
1.42 provos 761: arg = strdelim(&s);
1.40 ho 762: if (!arg || *arg == '\0')
1.32 markus 763: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 764: value = proto_spec(arg);
1.25 markus 765: if (value == SSH_PROTO_UNKNOWN)
766: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 767: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 768: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
769: *intptr = value;
770: break;
771:
1.17 markus 772: case oLogLevel:
1.164 dtucker 773: log_level_ptr = &options->log_level;
1.42 provos 774: arg = strdelim(&s);
1.38 provos 775: value = log_level_number(arg);
1.95 markus 776: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 777: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 778: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 779: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
780: *log_level_ptr = (LogLevel) value;
1.17 markus 781: break;
782:
1.88 stevesk 783: case oLocalForward:
1.17 markus 784: case oRemoteForward:
1.168 stevesk 785: case oDynamicForward:
1.42 provos 786: arg = strdelim(&s);
1.135 djm 787: if (arg == NULL || *arg == '\0')
1.88 stevesk 788: fatal("%.200s line %d: Missing port argument.",
789: filename, linenum);
1.135 djm 790:
1.168 stevesk 791: if (opcode == oLocalForward ||
792: opcode == oRemoteForward) {
793: arg2 = strdelim(&s);
794: if (arg2 == NULL || *arg2 == '\0')
795: fatal("%.200s line %d: Missing target argument.",
796: filename, linenum);
1.135 djm 797:
1.168 stevesk 798: /* construct a string for parse_forward */
799: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
800: } else if (opcode == oDynamicForward) {
801: strlcpy(fwdarg, arg, sizeof(fwdarg));
802: }
803:
804: if (parse_forward(&fwd, fwdarg,
1.176 djm 805: opcode == oDynamicForward ? 1 : 0,
806: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 807: fatal("%.200s line %d: Bad forwarding specification.",
808: filename, linenum);
1.135 djm 809:
1.88 stevesk 810: if (*activep) {
1.168 stevesk 811: if (opcode == oLocalForward ||
812: opcode == oDynamicForward)
1.135 djm 813: add_local_forward(options, &fwd);
1.88 stevesk 814: else if (opcode == oRemoteForward)
1.135 djm 815: add_remote_forward(options, &fwd);
1.88 stevesk 816: }
1.203 ! dtucker 817: free(fwd.connect_host);
! 818: free(fwd.listen_host);
1.17 markus 819: break;
1.71 markus 820:
1.90 stevesk 821: case oClearAllForwardings:
822: intptr = &options->clear_forwardings;
823: goto parse_flag;
824:
1.17 markus 825: case oHost:
826: *activep = 0;
1.191 djm 827: arg2 = NULL;
828: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
829: negated = *arg == '!';
830: if (negated)
831: arg++;
1.38 provos 832: if (match_pattern(host, arg)) {
1.191 djm 833: if (negated) {
834: debug("%.200s line %d: Skipping Host "
835: "block because of negated match "
836: "for %.100s", filename, linenum,
837: arg);
838: *activep = 0;
839: break;
840: }
841: if (!*activep)
842: arg2 = arg; /* logged below */
1.17 markus 843: *activep = 1;
844: }
1.191 djm 845: }
846: if (*activep)
847: debug("%.200s line %d: Applying options for %.100s",
848: filename, linenum, arg2);
1.42 provos 849: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 850: return 0;
851:
852: case oEscapeChar:
853: intptr = &options->escape_char;
1.42 provos 854: arg = strdelim(&s);
1.40 ho 855: if (!arg || *arg == '\0')
1.17 markus 856: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 857: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 858: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
859: value = (u_char) arg[1] & 31;
1.38 provos 860: else if (strlen(arg) == 1)
1.51 markus 861: value = (u_char) arg[0];
1.38 provos 862: else if (strcmp(arg, "none") == 0)
1.79 stevesk 863: value = SSH_ESCAPECHAR_NONE;
1.17 markus 864: else {
865: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 866: filename, linenum);
1.17 markus 867: /* NOTREACHED */
868: value = 0; /* Avoid compiler warning. */
869: }
870: if (*activep && *intptr == -1)
871: *intptr = value;
1.112 djm 872: break;
873:
874: case oAddressFamily:
875: arg = strdelim(&s);
1.140 markus 876: if (!arg || *arg == '\0')
877: fatal("%s line %d: missing address family.",
878: filename, linenum);
1.114 djm 879: intptr = &options->address_family;
1.112 djm 880: if (strcasecmp(arg, "inet") == 0)
1.114 djm 881: value = AF_INET;
1.112 djm 882: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 883: value = AF_INET6;
1.112 djm 884: else if (strcasecmp(arg, "any") == 0)
1.114 djm 885: value = AF_UNSPEC;
1.112 djm 886: else
887: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 888: if (*activep && *intptr == -1)
889: *intptr = value;
1.17 markus 890: break;
891:
1.101 markus 892: case oEnableSSHKeysign:
893: intptr = &options->enable_ssh_keysign;
894: goto parse_flag;
895:
1.128 markus 896: case oIdentitiesOnly:
897: intptr = &options->identities_only;
898: goto parse_flag;
899:
1.127 markus 900: case oServerAliveInterval:
901: intptr = &options->server_alive_interval;
902: goto parse_time;
903:
904: case oServerAliveCountMax:
905: intptr = &options->server_alive_count_max;
906: goto parse_int;
907:
1.130 djm 908: case oSendEnv:
909: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
910: if (strchr(arg, '=') != NULL)
911: fatal("%s line %d: Invalid environment name.",
912: filename, linenum);
1.137 djm 913: if (!*activep)
914: continue;
1.130 djm 915: if (options->num_send_env >= MAX_SEND_ENV)
916: fatal("%s line %d: too many send env.",
917: filename, linenum);
918: options->send_env[options->num_send_env++] =
919: xstrdup(arg);
920: }
921: break;
922:
1.132 djm 923: case oControlPath:
924: charptr = &options->control_path;
925: goto parse_string;
926:
927: case oControlMaster:
928: intptr = &options->control_master;
1.141 djm 929: arg = strdelim(&s);
930: if (!arg || *arg == '\0')
931: fatal("%.200s line %d: Missing ControlMaster argument.",
932: filename, linenum);
933: value = 0; /* To avoid compiler warning... */
934: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
935: value = SSHCTL_MASTER_YES;
936: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
937: value = SSHCTL_MASTER_NO;
938: else if (strcmp(arg, "auto") == 0)
939: value = SSHCTL_MASTER_AUTO;
940: else if (strcmp(arg, "ask") == 0)
941: value = SSHCTL_MASTER_ASK;
942: else if (strcmp(arg, "autoask") == 0)
943: value = SSHCTL_MASTER_AUTO_ASK;
944: else
945: fatal("%.200s line %d: Bad ControlMaster argument.",
946: filename, linenum);
947: if (*activep && *intptr == -1)
948: *intptr = value;
949: break;
1.132 djm 950:
1.187 djm 951: case oControlPersist:
952: /* no/false/yes/true, or a time spec */
953: intptr = &options->control_persist;
954: arg = strdelim(&s);
955: if (!arg || *arg == '\0')
956: fatal("%.200s line %d: Missing ControlPersist"
957: " argument.", filename, linenum);
958: value = 0;
959: value2 = 0; /* timeout */
960: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
961: value = 0;
962: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
963: value = 1;
964: else if ((value2 = convtime(arg)) >= 0)
965: value = 1;
966: else
967: fatal("%.200s line %d: Bad ControlPersist argument.",
968: filename, linenum);
969: if (*activep && *intptr == -1) {
970: *intptr = value;
971: options->control_persist_timeout = value2;
972: }
973: break;
974:
1.136 djm 975: case oHashKnownHosts:
976: intptr = &options->hash_known_hosts;
977: goto parse_flag;
978:
1.144 reyk 979: case oTunnel:
980: intptr = &options->tun_open;
1.145 reyk 981: arg = strdelim(&s);
982: if (!arg || *arg == '\0')
983: fatal("%s line %d: Missing yes/point-to-point/"
984: "ethernet/no argument.", filename, linenum);
985: value = 0; /* silence compiler */
986: if (strcasecmp(arg, "ethernet") == 0)
987: value = SSH_TUNMODE_ETHERNET;
988: else if (strcasecmp(arg, "point-to-point") == 0)
989: value = SSH_TUNMODE_POINTOPOINT;
990: else if (strcasecmp(arg, "yes") == 0)
991: value = SSH_TUNMODE_DEFAULT;
992: else if (strcasecmp(arg, "no") == 0)
993: value = SSH_TUNMODE_NO;
994: else
995: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
996: "no argument: %s", filename, linenum, arg);
997: if (*activep)
998: *intptr = value;
999: break;
1.144 reyk 1000:
1001: case oTunnelDevice:
1002: arg = strdelim(&s);
1003: if (!arg || *arg == '\0')
1004: fatal("%.200s line %d: Missing argument.", filename, linenum);
1005: value = a2tun(arg, &value2);
1.145 reyk 1006: if (value == SSH_TUNID_ERR)
1.144 reyk 1007: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1008: if (*activep) {
1009: options->tun_local = value;
1010: options->tun_remote = value2;
1011: }
1012: break;
1013:
1014: case oLocalCommand:
1015: charptr = &options->local_command;
1016: goto parse_command;
1017:
1018: case oPermitLocalCommand:
1019: intptr = &options->permit_local_command;
1020: goto parse_flag;
1021:
1.167 grunk 1022: case oVisualHostKey:
1023: intptr = &options->visual_host_key;
1024: goto parse_flag;
1025:
1.190 djm 1026: case oIPQoS:
1027: arg = strdelim(&s);
1028: if ((value = parse_ipqos(arg)) == -1)
1029: fatal("%s line %d: Bad IPQoS value: %s",
1030: filename, linenum, arg);
1031: arg = strdelim(&s);
1032: if (arg == NULL)
1033: value2 = value;
1034: else if ((value2 = parse_ipqos(arg)) == -1)
1035: fatal("%s line %d: Bad IPQoS value: %s",
1036: filename, linenum, arg);
1037: if (*activep) {
1038: options->ip_qos_interactive = value;
1039: options->ip_qos_bulk = value2;
1040: }
1041: break;
1042:
1.177 andreas 1043: case oUseRoaming:
1044: intptr = &options->use_roaming;
1045: goto parse_flag;
1046:
1.192 djm 1047: case oRequestTTY:
1048: arg = strdelim(&s);
1049: if (!arg || *arg == '\0')
1050: fatal("%s line %d: missing argument.",
1051: filename, linenum);
1052: intptr = &options->request_tty;
1053: if (strcasecmp(arg, "yes") == 0)
1054: value = REQUEST_TTY_YES;
1055: else if (strcasecmp(arg, "no") == 0)
1056: value = REQUEST_TTY_NO;
1057: else if (strcasecmp(arg, "force") == 0)
1058: value = REQUEST_TTY_FORCE;
1059: else if (strcasecmp(arg, "auto") == 0)
1060: value = REQUEST_TTY_AUTO;
1061: else
1062: fatal("Unsupported RequestTTY \"%s\"", arg);
1063: if (*activep && *intptr == -1)
1064: *intptr = value;
1065: break;
1066:
1.199 djm 1067: case oIgnoreUnknown:
1068: charptr = &options->ignored_unknown;
1069: goto parse_string;
1070:
1.96 markus 1071: case oDeprecated:
1.98 markus 1072: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1073: filename, linenum, keyword);
1.98 markus 1074: return 0;
1.96 markus 1075:
1.110 jakob 1076: case oUnsupported:
1077: error("%s line %d: Unsupported option \"%s\"",
1078: filename, linenum, keyword);
1079: return 0;
1080:
1.17 markus 1081: default:
1082: fatal("process_config_line: Unimplemented opcode %d", opcode);
1083: }
1084:
1085: /* Check that there is no garbage at end of line. */
1.57 djm 1086: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1087: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1088: filename, linenum, arg);
1.39 ho 1089: }
1.17 markus 1090: return 0;
1.1 deraadt 1091: }
1092:
1093:
1.19 markus 1094: /*
1095: * Reads the config file and modifies the options accordingly. Options
1096: * should already be initialized before this call. This never returns if
1.89 stevesk 1097: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1098: */
1.1 deraadt 1099:
1.89 stevesk 1100: int
1.134 deraadt 1101: read_config_file(const char *filename, const char *host, Options *options,
1.196 dtucker 1102: int flags)
1.1 deraadt 1103: {
1.17 markus 1104: FILE *f;
1105: char line[1024];
1106: int active, linenum;
1107: int bad_options = 0;
1108:
1.129 djm 1109: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1110: return 0;
1.129 djm 1111:
1.196 dtucker 1112: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1113: struct stat sb;
1.134 deraadt 1114:
1.131 dtucker 1115: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1116: fatal("fstat %s: %s", filename, strerror(errno));
1117: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1118: (sb.st_mode & 022) != 0))
1.129 djm 1119: fatal("Bad owner or permissions on %s", filename);
1120: }
1.17 markus 1121:
1122: debug("Reading configuration data %.200s", filename);
1123:
1.19 markus 1124: /*
1125: * Mark that we are now processing the options. This flag is turned
1126: * on/off by Host specifications.
1127: */
1.17 markus 1128: active = 1;
1129: linenum = 0;
1130: while (fgets(line, sizeof(line), f)) {
1131: /* Update line number counter. */
1132: linenum++;
1.196 dtucker 1133: if (process_config_line(options, host, line, filename, linenum,
1134: &active, flags & SSHCONF_USERCONF) != 0)
1.17 markus 1135: bad_options++;
1136: }
1137: fclose(f);
1138: if (bad_options > 0)
1.64 millert 1139: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1140: filename, bad_options);
1.89 stevesk 1141: return 1;
1.1 deraadt 1142: }
1143:
1.19 markus 1144: /*
1145: * Initializes options to special values that indicate that they have not yet
1146: * been set. Read_config_file will only set options with this value. Options
1147: * are processed in the following order: command line, user config file,
1148: * system config file. Last, fill_default_options is called.
1149: */
1.1 deraadt 1150:
1.26 markus 1151: void
1.17 markus 1152: initialize_options(Options * options)
1.1 deraadt 1153: {
1.17 markus 1154: memset(options, 'X', sizeof(*options));
1155: options->forward_agent = -1;
1156: options->forward_x11 = -1;
1.123 markus 1157: options->forward_x11_trusted = -1;
1.186 djm 1158: options->forward_x11_timeout = -1;
1.153 markus 1159: options->exit_on_forward_failure = -1;
1.34 markus 1160: options->xauth_location = NULL;
1.17 markus 1161: options->gateway_ports = -1;
1162: options->use_privileged_port = -1;
1163: options->rsa_authentication = -1;
1.50 markus 1164: options->pubkey_authentication = -1;
1.78 markus 1165: options->challenge_response_authentication = -1;
1.118 markus 1166: options->gss_authentication = -1;
1167: options->gss_deleg_creds = -1;
1.17 markus 1168: options->password_authentication = -1;
1.48 markus 1169: options->kbd_interactive_authentication = -1;
1170: options->kbd_interactive_devices = NULL;
1.17 markus 1171: options->rhosts_rsa_authentication = -1;
1.72 markus 1172: options->hostbased_authentication = -1;
1.17 markus 1173: options->batch_mode = -1;
1174: options->check_host_ip = -1;
1175: options->strict_host_key_checking = -1;
1176: options->compression = -1;
1.126 markus 1177: options->tcp_keep_alive = -1;
1.17 markus 1178: options->compression_level = -1;
1179: options->port = -1;
1.114 djm 1180: options->address_family = -1;
1.17 markus 1181: options->connection_attempts = -1;
1.111 djm 1182: options->connection_timeout = -1;
1.17 markus 1183: options->number_of_password_prompts = -1;
1184: options->cipher = -1;
1.25 markus 1185: options->ciphers = NULL;
1.62 markus 1186: options->macs = NULL;
1.189 djm 1187: options->kex_algorithms = NULL;
1.76 markus 1188: options->hostkeyalgorithms = NULL;
1.25 markus 1189: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1190: options->num_identity_files = 0;
1191: options->hostname = NULL;
1.52 markus 1192: options->host_key_alias = NULL;
1.17 markus 1193: options->proxy_command = NULL;
1194: options->user = NULL;
1195: options->escape_char = -1;
1.193 djm 1196: options->num_system_hostfiles = 0;
1197: options->num_user_hostfiles = 0;
1.185 djm 1198: options->local_forwards = NULL;
1.17 markus 1199: options->num_local_forwards = 0;
1.185 djm 1200: options->remote_forwards = NULL;
1.17 markus 1201: options->num_remote_forwards = 0;
1.90 stevesk 1202: options->clear_forwardings = -1;
1.95 markus 1203: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1204: options->preferred_authentications = NULL;
1.77 markus 1205: options->bind_address = NULL;
1.183 markus 1206: options->pkcs11_provider = NULL;
1.101 markus 1207: options->enable_ssh_keysign = - 1;
1.91 markus 1208: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1209: options->identities_only = - 1;
1.105 markus 1210: options->rekey_limit = - 1;
1.198 dtucker 1211: options->rekey_interval = -1;
1.107 jakob 1212: options->verify_host_key_dns = -1;
1.127 markus 1213: options->server_alive_interval = -1;
1214: options->server_alive_count_max = -1;
1.130 djm 1215: options->num_send_env = 0;
1.132 djm 1216: options->control_path = NULL;
1217: options->control_master = -1;
1.187 djm 1218: options->control_persist = -1;
1219: options->control_persist_timeout = 0;
1.136 djm 1220: options->hash_known_hosts = -1;
1.144 reyk 1221: options->tun_open = -1;
1222: options->tun_local = -1;
1223: options->tun_remote = -1;
1224: options->local_command = NULL;
1225: options->permit_local_command = -1;
1.177 andreas 1226: options->use_roaming = -1;
1.167 grunk 1227: options->visual_host_key = -1;
1.171 djm 1228: options->zero_knowledge_password_authentication = -1;
1.190 djm 1229: options->ip_qos_interactive = -1;
1230: options->ip_qos_bulk = -1;
1.192 djm 1231: options->request_tty = -1;
1.199 djm 1232: options->ignored_unknown = NULL;
1.1 deraadt 1233: }
1234:
1.19 markus 1235: /*
1236: * Called after processing other sources of option data, this fills those
1237: * options for which no value has been specified with their default values.
1238: */
1.1 deraadt 1239:
1.26 markus 1240: void
1.17 markus 1241: fill_default_options(Options * options)
1.1 deraadt 1242: {
1.17 markus 1243: if (options->forward_agent == -1)
1.33 markus 1244: options->forward_agent = 0;
1.17 markus 1245: if (options->forward_x11 == -1)
1.23 markus 1246: options->forward_x11 = 0;
1.123 markus 1247: if (options->forward_x11_trusted == -1)
1248: options->forward_x11_trusted = 0;
1.186 djm 1249: if (options->forward_x11_timeout == -1)
1250: options->forward_x11_timeout = 1200;
1.153 markus 1251: if (options->exit_on_forward_failure == -1)
1252: options->exit_on_forward_failure = 0;
1.34 markus 1253: if (options->xauth_location == NULL)
1.80 markus 1254: options->xauth_location = _PATH_XAUTH;
1.17 markus 1255: if (options->gateway_ports == -1)
1256: options->gateway_ports = 0;
1257: if (options->use_privileged_port == -1)
1.65 markus 1258: options->use_privileged_port = 0;
1.17 markus 1259: if (options->rsa_authentication == -1)
1260: options->rsa_authentication = 1;
1.50 markus 1261: if (options->pubkey_authentication == -1)
1262: options->pubkey_authentication = 1;
1.78 markus 1263: if (options->challenge_response_authentication == -1)
1.83 markus 1264: options->challenge_response_authentication = 1;
1.118 markus 1265: if (options->gss_authentication == -1)
1.122 markus 1266: options->gss_authentication = 0;
1.118 markus 1267: if (options->gss_deleg_creds == -1)
1268: options->gss_deleg_creds = 0;
1.17 markus 1269: if (options->password_authentication == -1)
1270: options->password_authentication = 1;
1.48 markus 1271: if (options->kbd_interactive_authentication == -1)
1.59 markus 1272: options->kbd_interactive_authentication = 1;
1.17 markus 1273: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1274: options->rhosts_rsa_authentication = 0;
1.72 markus 1275: if (options->hostbased_authentication == -1)
1276: options->hostbased_authentication = 0;
1.17 markus 1277: if (options->batch_mode == -1)
1278: options->batch_mode = 0;
1279: if (options->check_host_ip == -1)
1280: options->check_host_ip = 1;
1281: if (options->strict_host_key_checking == -1)
1282: options->strict_host_key_checking = 2; /* 2 is default */
1283: if (options->compression == -1)
1284: options->compression = 0;
1.126 markus 1285: if (options->tcp_keep_alive == -1)
1286: options->tcp_keep_alive = 1;
1.17 markus 1287: if (options->compression_level == -1)
1288: options->compression_level = 6;
1289: if (options->port == -1)
1290: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1291: if (options->address_family == -1)
1292: options->address_family = AF_UNSPEC;
1.17 markus 1293: if (options->connection_attempts == -1)
1.84 markus 1294: options->connection_attempts = 1;
1.17 markus 1295: if (options->number_of_password_prompts == -1)
1296: options->number_of_password_prompts = 3;
1297: /* Selected in ssh_login(). */
1298: if (options->cipher == -1)
1299: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1300: /* options->ciphers, default set in myproposals.h */
1.62 markus 1301: /* options->macs, default set in myproposals.h */
1.189 djm 1302: /* options->kex_algorithms, default set in myproposals.h */
1.76 markus 1303: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1304: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1305: options->protocol = SSH_PROTO_2;
1.17 markus 1306: if (options->num_identity_files == 0) {
1.50 markus 1307: if (options->protocol & SSH_PROTO_1) {
1.195 dtucker 1308: add_identity_file(options, "~/",
1309: _PATH_SSH_CLIENT_IDENTITY, 0);
1.50 markus 1310: }
1311: if (options->protocol & SSH_PROTO_2) {
1.195 dtucker 1312: add_identity_file(options, "~/",
1313: _PATH_SSH_CLIENT_ID_RSA, 0);
1314: add_identity_file(options, "~/",
1315: _PATH_SSH_CLIENT_ID_DSA, 0);
1316: add_identity_file(options, "~/",
1317: _PATH_SSH_CLIENT_ID_ECDSA, 0);
1.50 markus 1318: }
1.27 markus 1319: }
1.17 markus 1320: if (options->escape_char == -1)
1321: options->escape_char = '~';
1.193 djm 1322: if (options->num_system_hostfiles == 0) {
1323: options->system_hostfiles[options->num_system_hostfiles++] =
1324: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1325: options->system_hostfiles[options->num_system_hostfiles++] =
1326: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1327: }
1328: if (options->num_user_hostfiles == 0) {
1329: options->user_hostfiles[options->num_user_hostfiles++] =
1330: xstrdup(_PATH_SSH_USER_HOSTFILE);
1331: options->user_hostfiles[options->num_user_hostfiles++] =
1332: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1333: }
1.95 markus 1334: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1335: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1336: if (options->clear_forwardings == 1)
1337: clear_forwardings(options);
1.91 markus 1338: if (options->no_host_authentication_for_localhost == - 1)
1339: options->no_host_authentication_for_localhost = 0;
1.128 markus 1340: if (options->identities_only == -1)
1341: options->identities_only = 0;
1.101 markus 1342: if (options->enable_ssh_keysign == -1)
1343: options->enable_ssh_keysign = 0;
1.105 markus 1344: if (options->rekey_limit == -1)
1345: options->rekey_limit = 0;
1.198 dtucker 1346: if (options->rekey_interval == -1)
1347: options->rekey_interval = 0;
1.107 jakob 1348: if (options->verify_host_key_dns == -1)
1349: options->verify_host_key_dns = 0;
1.127 markus 1350: if (options->server_alive_interval == -1)
1351: options->server_alive_interval = 0;
1352: if (options->server_alive_count_max == -1)
1353: options->server_alive_count_max = 3;
1.132 djm 1354: if (options->control_master == -1)
1355: options->control_master = 0;
1.187 djm 1356: if (options->control_persist == -1) {
1357: options->control_persist = 0;
1358: options->control_persist_timeout = 0;
1359: }
1.136 djm 1360: if (options->hash_known_hosts == -1)
1361: options->hash_known_hosts = 0;
1.144 reyk 1362: if (options->tun_open == -1)
1.145 reyk 1363: options->tun_open = SSH_TUNMODE_NO;
1364: if (options->tun_local == -1)
1365: options->tun_local = SSH_TUNID_ANY;
1366: if (options->tun_remote == -1)
1367: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1368: if (options->permit_local_command == -1)
1369: options->permit_local_command = 0;
1.177 andreas 1370: if (options->use_roaming == -1)
1371: options->use_roaming = 1;
1.167 grunk 1372: if (options->visual_host_key == -1)
1373: options->visual_host_key = 0;
1.171 djm 1374: if (options->zero_knowledge_password_authentication == -1)
1375: options->zero_knowledge_password_authentication = 0;
1.190 djm 1376: if (options->ip_qos_interactive == -1)
1377: options->ip_qos_interactive = IPTOS_LOWDELAY;
1378: if (options->ip_qos_bulk == -1)
1379: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1380: if (options->request_tty == -1)
1381: options->request_tty = REQUEST_TTY_AUTO;
1.144 reyk 1382: /* options->local_command should not be set by default */
1.17 markus 1383: /* options->proxy_command should not be set by default */
1384: /* options->user will be set in the main program if appropriate */
1385: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1386: /* options->host_key_alias should not be set by default */
1.67 markus 1387: /* options->preferred_authentications will be set in ssh */
1.135 djm 1388: }
1389:
1390: /*
1391: * parse_forward
1392: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 1393: * dynamicfwd == 0
1.135 djm 1394: * [listenhost:]listenport:connecthost:connectport
1.168 stevesk 1395: * dynamicfwd == 1
1396: * [listenhost:]listenport
1.135 djm 1397: * returns number of arguments parsed or zero on error
1398: */
1399: int
1.176 djm 1400: parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 1401: {
1402: int i;
1403: char *p, *cp, *fwdarg[4];
1404:
1405: memset(fwd, '\0', sizeof(*fwd));
1406:
1407: cp = p = xstrdup(fwdspec);
1408:
1409: /* skip leading spaces */
1.162 tedu 1410: while (isspace(*cp))
1.135 djm 1411: cp++;
1412:
1413: for (i = 0; i < 4; ++i)
1414: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1415: break;
1416:
1.170 stevesk 1417: /* Check for trailing garbage */
1.135 djm 1418: if (cp != NULL)
1419: i = 0; /* failure */
1420:
1421: switch (i) {
1.168 stevesk 1422: case 1:
1423: fwd->listen_host = NULL;
1424: fwd->listen_port = a2port(fwdarg[0]);
1425: fwd->connect_host = xstrdup("socks");
1426: break;
1427:
1428: case 2:
1429: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1430: fwd->listen_port = a2port(fwdarg[1]);
1431: fwd->connect_host = xstrdup("socks");
1432: break;
1433:
1.135 djm 1434: case 3:
1435: fwd->listen_host = NULL;
1436: fwd->listen_port = a2port(fwdarg[0]);
1437: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1438: fwd->connect_port = a2port(fwdarg[2]);
1439: break;
1440:
1441: case 4:
1442: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1443: fwd->listen_port = a2port(fwdarg[1]);
1444: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1445: fwd->connect_port = a2port(fwdarg[3]);
1446: break;
1447: default:
1448: i = 0; /* failure */
1449: }
1450:
1.202 djm 1451: free(p);
1.135 djm 1452:
1.168 stevesk 1453: if (dynamicfwd) {
1454: if (!(i == 1 || i == 2))
1455: goto fail_free;
1456: } else {
1457: if (!(i == 3 || i == 4))
1458: goto fail_free;
1.175 djm 1459: if (fwd->connect_port <= 0)
1.168 stevesk 1460: goto fail_free;
1461: }
1462:
1.176 djm 1463: if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0))
1.135 djm 1464: goto fail_free;
1465:
1466: if (fwd->connect_host != NULL &&
1467: strlen(fwd->connect_host) >= NI_MAXHOST)
1468: goto fail_free;
1.176 djm 1469: if (fwd->listen_host != NULL &&
1470: strlen(fwd->listen_host) >= NI_MAXHOST)
1471: goto fail_free;
1472:
1.135 djm 1473:
1474: return (i);
1475:
1476: fail_free:
1.202 djm 1477: free(fwd->connect_host);
1478: fwd->connect_host = NULL;
1479: free(fwd->listen_host);
1480: fwd->listen_host = NULL;
1.135 djm 1481: return (0);
1.1 deraadt 1482: }
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