Annotation of src/usr.bin/ssh/readconf.c, Revision 1.22
1.1 deraadt 1: /*
1.18 deraadt 2: *
3: * readconf.c
4: *
5: * Author: Tatu Ylonen <ylo@cs.hut.fi>
6: *
7: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
8: * All rights reserved
9: *
10: * Created: Sat Apr 22 00:03:10 1995 ylo
11: *
12: * Functions for reading the configuration files.
13: *
14: */
1.1 deraadt 15:
16: #include "includes.h"
1.22 ! markus 17: RCSID("$Id: readconf.c,v 1.21 1999/11/24 20:24:09 markus Exp $");
1.1 deraadt 18:
19: #include "ssh.h"
20: #include "cipher.h"
21: #include "readconf.h"
22: #include "xmalloc.h"
23:
24: /* Format of the configuration file:
25:
26: # Configuration data is parsed as follows:
27: # 1. command line options
28: # 2. user-specific file
29: # 3. system-wide file
30: # Any configuration value is only changed the first time it is set.
31: # Thus, host-specific definitions should be at the beginning of the
32: # configuration file, and defaults at the end.
33:
34: # Host-specific declarations. These may override anything above. A single
35: # host may match multiple declarations; these are processed in the order
36: # that they are given in.
37:
38: Host *.ngs.fi ngs.fi
39: FallBackToRsh no
40:
41: Host fake.com
42: HostName another.host.name.real.org
43: User blaah
44: Port 34289
45: ForwardX11 no
46: ForwardAgent no
47:
48: Host books.com
49: RemoteForward 9999 shadows.cs.hut.fi:9999
50: Cipher 3des
51:
52: Host fascist.blob.com
53: Port 23123
54: User tylonen
55: RhostsAuthentication no
56: PasswordAuthentication no
57:
58: Host puukko.hut.fi
59: User t35124p
60: ProxyCommand ssh-proxy %h %p
61:
62: Host *.fr
63: UseRsh yes
64:
65: Host *.su
66: Cipher none
67: PasswordAuthentication no
68:
69: # Defaults for various options
70: Host *
71: ForwardAgent no
72: ForwardX11 yes
73: RhostsAuthentication yes
74: PasswordAuthentication yes
75: RSAAuthentication yes
76: RhostsRSAAuthentication yes
77: FallBackToRsh no
78: UseRsh no
79: StrictHostKeyChecking yes
80: KeepAlives no
81: IdentityFile ~/.ssh/identity
82: Port 22
83: EscapeChar ~
84:
85: */
86:
87: /* Keyword tokens. */
88:
1.17 markus 89: typedef enum {
90: oBadOption,
91: oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication,
92: oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh,
93: oSkeyAuthentication,
1.1 deraadt 94: #ifdef KRB4
1.17 markus 95: oKerberosAuthentication,
1.1 deraadt 96: #endif /* KRB4 */
97: #ifdef AFS
1.17 markus 98: oKerberosTgtPassing, oAFSTokenPassing,
1.1 deraadt 99: #endif
1.17 markus 100: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
101: oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
102: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
103: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
104: oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts, oTISAuthentication,
105: oUsePrivilegedPort, oLogLevel
1.1 deraadt 106: } OpCodes;
107:
108: /* Textual representations of the tokens. */
109:
1.17 markus 110: static struct {
111: const char *name;
112: OpCodes opcode;
113: } keywords[] = {
114: { "forwardagent", oForwardAgent },
115: { "forwardx11", oForwardX11 },
116: { "gatewayports", oGatewayPorts },
117: { "useprivilegedport", oUsePrivilegedPort },
118: { "rhostsauthentication", oRhostsAuthentication },
119: { "passwordauthentication", oPasswordAuthentication },
120: { "rsaauthentication", oRSAAuthentication },
121: { "skeyauthentication", oSkeyAuthentication },
1.1 deraadt 122: #ifdef KRB4
1.17 markus 123: { "kerberosauthentication", oKerberosAuthentication },
1.1 deraadt 124: #endif /* KRB4 */
1.5 dugsong 125: #ifdef AFS
1.17 markus 126: { "kerberostgtpassing", oKerberosTgtPassing },
127: { "afstokenpassing", oAFSTokenPassing },
1.1 deraadt 128: #endif
1.17 markus 129: { "fallbacktorsh", oFallBackToRsh },
130: { "usersh", oUseRsh },
131: { "identityfile", oIdentityFile },
132: { "hostname", oHostName },
133: { "proxycommand", oProxyCommand },
134: { "port", oPort },
135: { "cipher", oCipher },
136: { "remoteforward", oRemoteForward },
137: { "localforward", oLocalForward },
138: { "user", oUser },
139: { "host", oHost },
140: { "escapechar", oEscapeChar },
141: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
142: { "globalknownhostsfile", oGlobalKnownHostsFile },
143: { "userknownhostsfile", oUserKnownHostsFile },
144: { "connectionattempts", oConnectionAttempts },
145: { "batchmode", oBatchMode },
146: { "checkhostip", oCheckHostIP },
147: { "stricthostkeychecking", oStrictHostKeyChecking },
148: { "compression", oCompression },
149: { "compressionlevel", oCompressionLevel },
150: { "keepalive", oKeepAlives },
151: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
152: { "tisauthentication", oTISAuthentication },
153: { "loglevel", oLogLevel },
154: { NULL, 0 }
1.13 markus 155: };
156:
1.1 deraadt 157: /* Characters considered whitespace in strtok calls. */
158: #define WHITESPACE " \t\r\n"
159:
160:
1.19 markus 161: /*
162: * Adds a local TCP/IP port forward to options. Never returns if there is an
163: * error.
164: */
1.1 deraadt 165:
1.17 markus 166: void
1.22 ! markus 167: add_local_forward(Options *options, u_short port, const char *host,
! 168: u_short host_port)
1.1 deraadt 169: {
1.17 markus 170: Forward *fwd;
171: extern uid_t original_real_uid;
172: if (port < IPPORT_RESERVED && original_real_uid != 0)
173: fatal("Privileged ports can only be forwarded by root.\n");
174: if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
175: fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
176: fwd = &options->local_forwards[options->num_local_forwards++];
177: fwd->port = port;
178: fwd->host = xstrdup(host);
179: fwd->host_port = host_port;
1.1 deraadt 180: }
181:
1.19 markus 182: /*
183: * Adds a remote TCP/IP port forward to options. Never returns if there is
184: * an error.
185: */
1.1 deraadt 186:
1.17 markus 187: void
1.22 ! markus 188: add_remote_forward(Options *options, u_short port, const char *host,
! 189: u_short host_port)
1.1 deraadt 190: {
1.17 markus 191: Forward *fwd;
192: if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
193: fatal("Too many remote forwards (max %d).",
194: SSH_MAX_FORWARDS_PER_DIRECTION);
195: fwd = &options->remote_forwards[options->num_remote_forwards++];
196: fwd->port = port;
197: fwd->host = xstrdup(host);
198: fwd->host_port = host_port;
1.1 deraadt 199: }
200:
1.19 markus 201: /*
202: * Returns the number of the token pointed to by cp of length len. Never
203: * returns if the token is not known.
204: */
1.1 deraadt 205:
1.17 markus 206: static OpCodes
207: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 208: {
1.17 markus 209: unsigned int i;
1.1 deraadt 210:
1.17 markus 211: for (i = 0; keywords[i].name; i++)
1.20 markus 212: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 213: return keywords[i].opcode;
214:
215: fprintf(stderr, "%s: line %d: Bad configuration option: %s\n",
216: filename, linenum, cp);
217: return oBadOption;
1.1 deraadt 218: }
219:
1.19 markus 220: /*
221: * Processes a single option line as used in the configuration files. This
222: * only sets those values that have not already been set.
223: */
1.1 deraadt 224:
1.14 markus 225: int
226: process_config_line(Options *options, const char *host,
1.17 markus 227: char *line, const char *filename, int linenum,
228: int *activep)
1.1 deraadt 229: {
1.21 markus 230: char buf[256], *cp, *string, **charptr, *cp2;
1.22 ! markus 231: int opcode, *intptr, value;
! 232: u_short fwd_port, fwd_host_port;
1.1 deraadt 233:
1.17 markus 234: /* Skip leading whitespace. */
235: cp = line + strspn(line, WHITESPACE);
236: if (!*cp || *cp == '\n' || *cp == '#')
237: return 0;
238:
1.19 markus 239: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.17 markus 240: cp = strtok(cp, WHITESPACE);
241: opcode = parse_token(cp, filename, linenum);
242:
243: switch (opcode) {
244: case oBadOption:
1.19 markus 245: /* don't panic, but count bad options */
246: return -1;
1.17 markus 247: /* NOTREACHED */
248: case oForwardAgent:
249: intptr = &options->forward_agent;
250: parse_flag:
251: cp = strtok(NULL, WHITESPACE);
252: if (!cp)
253: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
254: value = 0; /* To avoid compiler warning... */
255: if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0)
256: value = 1;
257: else if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0)
258: value = 0;
259: else
260: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
261: if (*activep && *intptr == -1)
262: *intptr = value;
263: break;
264:
265: case oForwardX11:
266: intptr = &options->forward_x11;
267: goto parse_flag;
268:
269: case oGatewayPorts:
270: intptr = &options->gateway_ports;
271: goto parse_flag;
272:
273: case oUsePrivilegedPort:
274: intptr = &options->use_privileged_port;
275: goto parse_flag;
276:
277: case oRhostsAuthentication:
278: intptr = &options->rhosts_authentication;
279: goto parse_flag;
280:
281: case oPasswordAuthentication:
282: intptr = &options->password_authentication;
283: goto parse_flag;
284:
285: case oRSAAuthentication:
286: intptr = &options->rsa_authentication;
287: goto parse_flag;
288:
289: case oRhostsRSAAuthentication:
290: intptr = &options->rhosts_rsa_authentication;
291: goto parse_flag;
292:
293: case oTISAuthentication:
294: /* fallthrough, there is no difference on the client side */
295: case oSkeyAuthentication:
296: intptr = &options->skey_authentication;
297: goto parse_flag;
1.16 markus 298:
1.1 deraadt 299: #ifdef KRB4
1.17 markus 300: case oKerberosAuthentication:
301: intptr = &options->kerberos_authentication;
302: goto parse_flag;
1.1 deraadt 303: #endif /* KRB4 */
304:
1.5 dugsong 305: #ifdef AFS
1.17 markus 306: case oKerberosTgtPassing:
307: intptr = &options->kerberos_tgt_passing;
308: goto parse_flag;
309:
310: case oAFSTokenPassing:
311: intptr = &options->afs_token_passing;
312: goto parse_flag;
1.1 deraadt 313: #endif
1.17 markus 314:
315: case oFallBackToRsh:
316: intptr = &options->fallback_to_rsh;
317: goto parse_flag;
318:
319: case oUseRsh:
320: intptr = &options->use_rsh;
321: goto parse_flag;
322:
323: case oBatchMode:
324: intptr = &options->batch_mode;
325: goto parse_flag;
326:
327: case oCheckHostIP:
328: intptr = &options->check_host_ip;
329: goto parse_flag;
330:
331: case oStrictHostKeyChecking:
332: intptr = &options->strict_host_key_checking;
333: cp = strtok(NULL, WHITESPACE);
334: if (!cp)
335: fatal("%.200s line %d: Missing yes/no argument.",
336: filename, linenum);
337: value = 0; /* To avoid compiler warning... */
338: if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0)
339: value = 1;
340: else if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0)
341: value = 0;
342: else if (strcmp(cp, "ask") == 0)
343: value = 2;
344: else
345: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
346: if (*activep && *intptr == -1)
347: *intptr = value;
348: break;
349:
350: case oCompression:
351: intptr = &options->compression;
352: goto parse_flag;
353:
354: case oKeepAlives:
355: intptr = &options->keepalives;
356: goto parse_flag;
357:
358: case oNumberOfPasswordPrompts:
359: intptr = &options->number_of_password_prompts;
360: goto parse_int;
361:
362: case oCompressionLevel:
363: intptr = &options->compression_level;
364: goto parse_int;
365:
366: case oIdentityFile:
367: cp = strtok(NULL, WHITESPACE);
368: if (!cp)
369: fatal("%.200s line %d: Missing argument.", filename, linenum);
370: if (*activep) {
371: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
372: fatal("%.200s line %d: Too many identity files specified (max %d).",
373: filename, linenum, SSH_MAX_IDENTITY_FILES);
374: options->identity_files[options->num_identity_files++] = xstrdup(cp);
375: }
376: break;
377:
378: case oUser:
379: charptr = &options->user;
380: parse_string:
381: cp = strtok(NULL, WHITESPACE);
382: if (!cp)
383: fatal("%.200s line %d: Missing argument.", filename, linenum);
384: if (*activep && *charptr == NULL)
385: *charptr = xstrdup(cp);
386: break;
387:
388: case oGlobalKnownHostsFile:
389: charptr = &options->system_hostfile;
390: goto parse_string;
391:
392: case oUserKnownHostsFile:
393: charptr = &options->user_hostfile;
394: goto parse_string;
395:
396: case oHostName:
397: charptr = &options->hostname;
398: goto parse_string;
399:
400: case oProxyCommand:
401: charptr = &options->proxy_command;
402: string = xstrdup("");
403: while ((cp = strtok(NULL, WHITESPACE)) != NULL) {
404: string = xrealloc(string, strlen(string) + strlen(cp) + 2);
405: strcat(string, " ");
406: strcat(string, cp);
407: }
408: if (*activep && *charptr == NULL)
409: *charptr = string;
410: else
411: xfree(string);
412: return 0;
413:
414: case oPort:
415: intptr = &options->port;
416: parse_int:
417: cp = strtok(NULL, WHITESPACE);
418: if (!cp)
419: fatal("%.200s line %d: Missing argument.", filename, linenum);
420: if (cp[0] < '0' || cp[0] > '9')
421: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 422:
423: /* Octal, decimal, or hex format? */
424: value = strtol(cp, &cp2, 0);
425: if (cp == cp2)
426: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 427: if (*activep && *intptr == -1)
428: *intptr = value;
429: break;
430:
431: case oConnectionAttempts:
432: intptr = &options->connection_attempts;
433: goto parse_int;
434:
435: case oCipher:
436: intptr = &options->cipher;
437: cp = strtok(NULL, WHITESPACE);
438: value = cipher_number(cp);
439: if (value == -1)
440: fatal("%.200s line %d: Bad cipher '%s'.",
441: filename, linenum, cp ? cp : "<NONE>");
442: if (*activep && *intptr == -1)
443: *intptr = value;
444: break;
445:
446: case oLogLevel:
447: intptr = (int *) &options->log_level;
448: cp = strtok(NULL, WHITESPACE);
449: value = log_level_number(cp);
450: if (value == (LogLevel) - 1)
451: fatal("%.200s line %d: unsupported log level '%s'\n",
452: filename, linenum, cp ? cp : "<NONE>");
453: if (*activep && (LogLevel) * intptr == -1)
454: *intptr = (LogLevel) value;
455: break;
456:
457: case oRemoteForward:
458: cp = strtok(NULL, WHITESPACE);
459: if (!cp)
460: fatal("%.200s line %d: Missing argument.", filename, linenum);
461: if (cp[0] < '0' || cp[0] > '9')
462: fatal("%.200s line %d: Badly formatted port number.",
463: filename, linenum);
464: fwd_port = atoi(cp);
465: cp = strtok(NULL, WHITESPACE);
466: if (!cp)
467: fatal("%.200s line %d: Missing second argument.",
468: filename, linenum);
1.22 ! markus 469: if (sscanf(cp, "%255[^:]:%hu", buf, &fwd_host_port) != 2)
1.17 markus 470: fatal("%.200s line %d: Badly formatted host:port.",
471: filename, linenum);
472: if (*activep)
473: add_remote_forward(options, fwd_port, buf, fwd_host_port);
474: break;
475:
476: case oLocalForward:
477: cp = strtok(NULL, WHITESPACE);
478: if (!cp)
479: fatal("%.200s line %d: Missing argument.", filename, linenum);
480: if (cp[0] < '0' || cp[0] > '9')
481: fatal("%.200s line %d: Badly formatted port number.",
482: filename, linenum);
483: fwd_port = atoi(cp);
484: cp = strtok(NULL, WHITESPACE);
485: if (!cp)
486: fatal("%.200s line %d: Missing second argument.",
487: filename, linenum);
1.22 ! markus 488: if (sscanf(cp, "%255[^:]:%hu", buf, &fwd_host_port) != 2)
1.17 markus 489: fatal("%.200s line %d: Badly formatted host:port.",
490: filename, linenum);
491: if (*activep)
492: add_local_forward(options, fwd_port, buf, fwd_host_port);
493: break;
494:
495: case oHost:
496: *activep = 0;
497: while ((cp = strtok(NULL, WHITESPACE)) != NULL)
498: if (match_pattern(host, cp)) {
499: debug("Applying options for %.100s", cp);
500: *activep = 1;
501: break;
502: }
1.19 markus 503: /* Avoid garbage check below, as strtok already returned NULL. */
1.17 markus 504: return 0;
505:
506: case oEscapeChar:
507: intptr = &options->escape_char;
508: cp = strtok(NULL, WHITESPACE);
509: if (!cp)
510: fatal("%.200s line %d: Missing argument.", filename, linenum);
511: if (cp[0] == '^' && cp[2] == 0 &&
512: (unsigned char) cp[1] >= 64 && (unsigned char) cp[1] < 128)
513: value = (unsigned char) cp[1] & 31;
514: else if (strlen(cp) == 1)
515: value = (unsigned char) cp[0];
516: else if (strcmp(cp, "none") == 0)
517: value = -2;
518: else {
519: fatal("%.200s line %d: Bad escape character.",
520: filename, linenum);
521: /* NOTREACHED */
522: value = 0; /* Avoid compiler warning. */
523: }
524: if (*activep && *intptr == -1)
525: *intptr = value;
526: break;
527:
528: default:
529: fatal("process_config_line: Unimplemented opcode %d", opcode);
530: }
531:
532: /* Check that there is no garbage at end of line. */
533: if (strtok(NULL, WHITESPACE) != NULL)
534: fatal("%.200s line %d: garbage at end of line.",
535: filename, linenum);
536: return 0;
1.1 deraadt 537: }
538:
539:
1.19 markus 540: /*
541: * Reads the config file and modifies the options accordingly. Options
542: * should already be initialized before this call. This never returns if
543: * there is an error. If the file does not exist, this returns immediately.
544: */
1.1 deraadt 545:
1.17 markus 546: void
547: read_config_file(const char *filename, const char *host, Options *options)
1.1 deraadt 548: {
1.17 markus 549: FILE *f;
550: char line[1024];
551: int active, linenum;
552: int bad_options = 0;
553:
554: /* Open the file. */
555: f = fopen(filename, "r");
556: if (!f)
557: return;
558:
559: debug("Reading configuration data %.200s", filename);
560:
1.19 markus 561: /*
562: * Mark that we are now processing the options. This flag is turned
563: * on/off by Host specifications.
564: */
1.17 markus 565: active = 1;
566: linenum = 0;
567: while (fgets(line, sizeof(line), f)) {
568: /* Update line number counter. */
569: linenum++;
570: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
571: bad_options++;
572: }
573: fclose(f);
574: if (bad_options > 0)
575: fatal("%s: terminating, %d bad configuration options\n",
576: filename, bad_options);
1.1 deraadt 577: }
578:
1.19 markus 579: /*
580: * Initializes options to special values that indicate that they have not yet
581: * been set. Read_config_file will only set options with this value. Options
582: * are processed in the following order: command line, user config file,
583: * system config file. Last, fill_default_options is called.
584: */
1.1 deraadt 585:
1.17 markus 586: void
587: initialize_options(Options * options)
1.1 deraadt 588: {
1.17 markus 589: memset(options, 'X', sizeof(*options));
590: options->forward_agent = -1;
591: options->forward_x11 = -1;
592: options->gateway_ports = -1;
593: options->use_privileged_port = -1;
594: options->rhosts_authentication = -1;
595: options->rsa_authentication = -1;
596: options->skey_authentication = -1;
1.1 deraadt 597: #ifdef KRB4
1.17 markus 598: options->kerberos_authentication = -1;
1.1 deraadt 599: #endif
1.5 dugsong 600: #ifdef AFS
1.17 markus 601: options->kerberos_tgt_passing = -1;
602: options->afs_token_passing = -1;
1.1 deraadt 603: #endif
1.17 markus 604: options->password_authentication = -1;
605: options->rhosts_rsa_authentication = -1;
606: options->fallback_to_rsh = -1;
607: options->use_rsh = -1;
608: options->batch_mode = -1;
609: options->check_host_ip = -1;
610: options->strict_host_key_checking = -1;
611: options->compression = -1;
612: options->keepalives = -1;
613: options->compression_level = -1;
614: options->port = -1;
615: options->connection_attempts = -1;
616: options->number_of_password_prompts = -1;
617: options->cipher = -1;
618: options->num_identity_files = 0;
619: options->hostname = NULL;
620: options->proxy_command = NULL;
621: options->user = NULL;
622: options->escape_char = -1;
623: options->system_hostfile = NULL;
624: options->user_hostfile = NULL;
625: options->num_local_forwards = 0;
626: options->num_remote_forwards = 0;
627: options->log_level = (LogLevel) - 1;
1.1 deraadt 628: }
629:
1.19 markus 630: /*
631: * Called after processing other sources of option data, this fills those
632: * options for which no value has been specified with their default values.
633: */
1.1 deraadt 634:
1.17 markus 635: void
636: fill_default_options(Options * options)
1.1 deraadt 637: {
1.17 markus 638: if (options->forward_agent == -1)
639: options->forward_agent = 1;
640: if (options->forward_x11 == -1)
641: options->forward_x11 = 1;
642: if (options->gateway_ports == -1)
643: options->gateway_ports = 0;
644: if (options->use_privileged_port == -1)
645: options->use_privileged_port = 1;
646: if (options->rhosts_authentication == -1)
647: options->rhosts_authentication = 1;
648: if (options->rsa_authentication == -1)
649: options->rsa_authentication = 1;
650: if (options->skey_authentication == -1)
651: options->skey_authentication = 0;
1.1 deraadt 652: #ifdef KRB4
1.17 markus 653: if (options->kerberos_authentication == -1)
654: options->kerberos_authentication = 1;
1.5 dugsong 655: #endif /* KRB4 */
656: #ifdef AFS
1.17 markus 657: if (options->kerberos_tgt_passing == -1)
658: options->kerberos_tgt_passing = 1;
659: if (options->afs_token_passing == -1)
660: options->afs_token_passing = 1;
1.5 dugsong 661: #endif /* AFS */
1.17 markus 662: if (options->password_authentication == -1)
663: options->password_authentication = 1;
664: if (options->rhosts_rsa_authentication == -1)
665: options->rhosts_rsa_authentication = 1;
666: if (options->fallback_to_rsh == -1)
667: options->fallback_to_rsh = 1;
668: if (options->use_rsh == -1)
669: options->use_rsh = 0;
670: if (options->batch_mode == -1)
671: options->batch_mode = 0;
672: if (options->check_host_ip == -1)
673: options->check_host_ip = 1;
674: if (options->strict_host_key_checking == -1)
675: options->strict_host_key_checking = 2; /* 2 is default */
676: if (options->compression == -1)
677: options->compression = 0;
678: if (options->keepalives == -1)
679: options->keepalives = 1;
680: if (options->compression_level == -1)
681: options->compression_level = 6;
682: if (options->port == -1)
683: options->port = 0; /* Filled in ssh_connect. */
684: if (options->connection_attempts == -1)
685: options->connection_attempts = 4;
686: if (options->number_of_password_prompts == -1)
687: options->number_of_password_prompts = 3;
688: /* Selected in ssh_login(). */
689: if (options->cipher == -1)
690: options->cipher = SSH_CIPHER_NOT_SET;
691: if (options->num_identity_files == 0) {
692: options->identity_files[0] =
693: xmalloc(2 + strlen(SSH_CLIENT_IDENTITY) + 1);
694: sprintf(options->identity_files[0], "~/%.100s", SSH_CLIENT_IDENTITY);
695: options->num_identity_files = 1;
696: }
697: if (options->escape_char == -1)
698: options->escape_char = '~';
699: if (options->system_hostfile == NULL)
700: options->system_hostfile = SSH_SYSTEM_HOSTFILE;
701: if (options->user_hostfile == NULL)
702: options->user_hostfile = SSH_USER_HOSTFILE;
703: if (options->log_level == (LogLevel) - 1)
704: options->log_level = SYSLOG_LEVEL_INFO;
705: /* options->proxy_command should not be set by default */
706: /* options->user will be set in the main program if appropriate */
707: /* options->hostname will be set in the main program if appropriate */
1.1 deraadt 708: }
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