lib/krb5/verify_krb5_conf.c

   1 /*
   2  * Copyright (c) 1999 - 2005 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "krb5_locl.h"
  35 #include <getarg.h>
  36 #include <parse_bytes.h>
  37 #include <err.h>
  38
  39 /* verify krb5.conf */
  40
  41 static int dumpconfig_flag = 0;
  42 static int version_flag = 0;
  43 static int help_flag    = 0;
  44 static int warn_mit_syntax_flag = 0;
  45
  46 static struct getargs args[] = {
  47     {"dumpconfig", 0,      arg_flag,       &dumpconfig_flag,
  48      "show the parsed config files", NULL },
  49     {"warn-mit-syntax", 0, arg_flag,       &warn_mit_syntax_flag,
  50      "show the parsed config files", NULL },
  51     {"version", 0,      arg_flag,       &version_flag,
  52      "print version", NULL },
  53     {"help",    0,      arg_flag,       &help_flag,
  54      NULL, NULL }
  55 };
  56
  57 static void
  58 usage (int ret)
  59 {
  60     arg_printusage (args,
  61                     sizeof(args)/sizeof(*args),
  62                     NULL,
  63                     "[config-file]");
  64     exit (ret);
  65 }
  66
  67 static int
  68 check_bytes(krb5_context context, const char *path, char *data)
  69 {
  70     if(parse_bytes(data, NULL) == -1) {
  71         krb5_warnx(context, "%s: failed to parse \"%s\" as size", path, data);
  72         return 1;
  73     }
  74     return 0;
  75 }
  76
  77 static int
  78 check_time(krb5_context context, const char *path, char *data)
  79 {
  80     if(parse_time(data, NULL) == -1) {
  81         krb5_warnx(context, "%s: failed to parse \"%s\" as time", path, data);
  82         return 1;
  83     }
  84     return 0;
  85 }
  86
  87 static int
  88 check_numeric(krb5_context context, const char *path, char *data)
  89 {
  90     long v;
  91     char *end;
  92     v = strtol(data, &end, 0);
  93
  94     if ((v == LONG_MIN || v == LONG_MAX) && errno != 0) {
  95         krb5_warnx(context, "%s: over/under flow for \"%s\"",
  96                    path, data);
  97         return 1;
  98     }
  99     if(*end != '\0') {
 100         krb5_warnx(context, "%s: failed to parse \"%s\" as a number",
 101                    path, data);
 102         return 1;
 103     }
 104     return 0;
 105 }
 106
 107 static int
 108 check_boolean(krb5_context context, const char *path, char *data)
 109 {
 110     long int v;
 111     char *end;
 112     if(strcasecmp(data, "yes") == 0 ||
 113        strcasecmp(data, "true") == 0 ||
 114        strcasecmp(data, "no") == 0 ||
 115        strcasecmp(data, "false") == 0)
 116         return 0;
 117     v = strtol(data, &end, 0);
 118     if(*end != '\0') {
 119         krb5_warnx(context, "%s: failed to parse \"%s\" as a boolean",
 120                    path, data);
 121         return 1;
 122     }
 123     if(v != 0 && v != 1)
 124         krb5_warnx(context, "%s: numeric value \"%s\" is treated as \"true\"",
 125                    path, data);
 126     return 0;
 127 }
 128
 129 static int
 130 check_524(krb5_context context, const char *path, char *data)
 131 {
 132     if(strcasecmp(data, "yes") == 0 ||
 133        strcasecmp(data, "no") == 0 ||
 134        strcasecmp(data, "2b") == 0 ||
 135        strcasecmp(data, "local") == 0)
 136         return 0;
 137
 138     krb5_warnx(context, "%s: didn't contain a valid option `%s'",
 139                path, data);
 140     return 1;
 141 }
 142
 143 static int
 144 check_host(krb5_context context, const char *path, char *data)
 145 {
 146     int ret;
 147     char hostname[128];
 148     const char *p = data;
 149     struct addrinfo hints;
 150     char service[32];
 151     int defport;
 152     struct addrinfo *ai;
 153
 154     hints.ai_flags = 0;
 155     hints.ai_family = PF_UNSPEC;
 156     hints.ai_socktype = 0;
 157     hints.ai_protocol = 0;
 158
 159     hints.ai_addrlen = 0;
 160     hints.ai_canonname = NULL;
 161     hints.ai_addr = NULL;
 162     hints.ai_next = NULL;
 163
 164     /* XXX data could be a list of hosts that this code can't handle */
 165     /* XXX copied from krbhst.c */
 166     if(strncmp(p, "http://", 7) == 0){
 167         p += 7;
 168         hints.ai_socktype = SOCK_STREAM;
 169         strlcpy(service, "http", sizeof(service));
 170         defport = 80;
 171     } else if(strncmp(p, "http/", 5) == 0) {
 172         p += 5;
 173         hints.ai_socktype = SOCK_STREAM;
 174         strlcpy(service, "http", sizeof(service));
 175         defport = 80;
 176     }else if(strncmp(p, "tcp/", 4) == 0){
 177         p += 4;
 178         hints.ai_socktype = SOCK_STREAM;
 179         strlcpy(service, "kerberos", sizeof(service));
 180         defport = 88;
 181     } else if(strncmp(p, "udp/", 4) == 0) {
 182         p += 4;
 183         hints.ai_socktype = SOCK_DGRAM;
 184         strlcpy(service, "kerberos", sizeof(service));
 185         defport = 88;
 186     } else {
 187         hints.ai_socktype = SOCK_DGRAM;
 188         strlcpy(service, "kerberos", sizeof(service));
 189         defport = 88;
 190     }
 191     if(strsep_copy(&p, ":", hostname, sizeof(hostname)) < 0) {
 192         return 1;
 193     }
 194     hostname[strcspn(hostname, "/")] = '\0';
 195     if(p != NULL) {
 196         char *end;
 197         int tmp = strtol(p, &end, 0);
 198         if(end == p) {
 199             krb5_warnx(context, "%s: failed to parse port number in %s",
 200                        path, data);
 201             return 1;
 202         }
 203         defport = tmp;
 204         snprintf(service, sizeof(service), "%u", defport);
 205     }
 206     ret = getaddrinfo(hostname, service, &hints, &ai);
 207     if(ret == EAI_SERVICE && !isdigit((unsigned char)service[0])) {
 208         snprintf(service, sizeof(service), "%u", defport);
 209         ret = getaddrinfo(hostname, service, &hints, &ai);
 210     }
 211     if(ret != 0) {
 212         krb5_warnx(context, "%s: %s (%s)", path, gai_strerror(ret), hostname);
 213         return 1;
 214     }
 215     return 0;
 216 }
 217
 218 static int
 219 mit_entry(krb5_context context, const char *path, char *data)
 220 {
 221     if (warn_mit_syntax_flag)
 222         krb5_warnx(context, "%s is only used by MIT Kerberos", path);
 223     return 0;
 224 }
 225
 226 struct s2i {
 227     const char *s;
 228     int val;
 229 };
 230
 231 #define L(X) { #X, LOG_ ## X }
 232
 233 static struct s2i syslogvals[] = {
 234     /* severity */
 235     L(EMERG),
 236     L(ALERT),
 237     L(CRIT),
 238     L(ERR),
 239     L(WARNING),
 240     L(NOTICE),
 241     L(INFO),
 242     L(DEBUG),
 243     /* facility */
 244     L(AUTH),
 245 #ifdef LOG_AUTHPRIV
 246     L(AUTHPRIV),
 247 #endif
 248 #ifdef LOG_CRON
 249     L(CRON),
 250 #endif
 251     L(DAEMON),
 252 #ifdef LOG_FTP
 253     L(FTP),
 254 #endif
 255     L(KERN),
 256     L(LPR),
 257     L(MAIL),
 258 #ifdef LOG_NEWS
 259     L(NEWS),
 260 #endif
 261     L(SYSLOG),
 262     L(USER),
 263 #ifdef LOG_UUCP
 264     L(UUCP),
 265 #endif
 266     L(LOCAL0),
 267     L(LOCAL1),
 268     L(LOCAL2),
 269     L(LOCAL3),
 270     L(LOCAL4),
 271     L(LOCAL5),
 272     L(LOCAL6),
 273     L(LOCAL7),
 274     { NULL, -1 }
 275 };
 276
 277 static int
 278 find_value(const char *s, struct s2i *table)
 279 {
 280     while(table->s && strcasecmp(table->s, s))
 281         table++;
 282     return table->val;
 283 }
 284
 285 static int
 286 check_log(krb5_context context, const char *path, char *data)
 287 {
 288     /* XXX sync with log.c */
 289     int min = 0, max = -1, n;
 290     char c;
 291     const char *p = data;
 292
 293     n = sscanf(p, "%d%c%d/", &min, &c, &max);
 294     if(n == 2){
 295         if(c == '/') {
 296             if(min < 0){
 297                 max = -min;
 298                 min = 0;
 299             }else{
 300                 max = min;
 301             }
 302         }
 303     }
 304     if(n){
 305         p = strchr(p, '/');
 306         if(p == NULL) {
 307             krb5_warnx(context, "%s: failed to parse \"%s\"", path, data);
 308             return 1;
 309         }
 310         p++;
 311     }
 312     if(strcmp(p, "STDERR") == 0 ||
 313        strcmp(p, "CONSOLE") == 0 ||
 314        (strncmp(p, "FILE", 4) == 0 && (p[4] == ':' || p[4] == '=')) ||
 315        (strncmp(p, "DEVICE", 6) == 0 && p[6] == '='))
 316         return 0;
 317     if(strncmp(p, "SYSLOG", 6) == 0){
 318         int ret = 0;
 319         char severity[128] = "";
 320         char facility[128] = "";
 321         p += 6;
 322         if(*p != '\0')
 323             p++;
 324         if(strsep_copy(&p, ":", severity, sizeof(severity)) != -1)
 325             strsep_copy(&p, ":", facility, sizeof(facility));
 326         if(*severity == '\0')
 327             strlcpy(severity, "ERR", sizeof(severity));
 328         if(*facility == '\0')
 329             strlcpy(facility, "AUTH", sizeof(facility));
 330         if(find_value(severity, syslogvals) == -1) {
 331             krb5_warnx(context, "%s: unknown syslog facility \"%s\"",
 332                        path, facility);
 333             ret++;
 334         }
 335         if(find_value(severity, syslogvals) == -1) {
 336             krb5_warnx(context, "%s: unknown syslog severity \"%s\"",
 337                        path, severity);
 338             ret++;
 339         }
 340         return ret;
 341     }else{
 342         krb5_warnx(context, "%s: unknown log type: \"%s\"", path, data);
 343         return 1;
 344     }
 345 }
 346
 347 typedef int (*check_func_t)(krb5_context, const char*, char*);
 348 struct entry {
 349     const char *name;
 350     int type;
 351     void *check_data;
 352     int deprecated;
 353 };
 354
 355 struct entry all_strings[] = {
 356     { "", krb5_config_string, NULL },
 357     { NULL }
 358 };
 359
 360 struct entry all_boolean[] = {
 361     { "", krb5_config_string, check_boolean },
 362     { NULL }
 363 };
 364
 365
 366 struct entry v4_name_convert_entries[] = {
 367     { "host", krb5_config_list, all_strings },
 368     { "plain", krb5_config_list, all_strings },
 369     { NULL }
 370 };
 371
 372 struct entry libdefaults_entries[] = {
 373     { "accept_null_addresses", krb5_config_string, check_boolean },
 374     { "allow_weak_crypto", krb5_config_string, check_boolean },
 375     { "capath", krb5_config_list, all_strings, 1 },
 376     { "check_pac", krb5_config_string, check_boolean },
 377     { "clockskew", krb5_config_string, check_time },
 378     { "date_format", krb5_config_string, NULL },
 379     { "default_cc_name", krb5_config_string, NULL },
 380     { "default_etypes", krb5_config_string, NULL },
 381     { "default_etypes_des", krb5_config_string, NULL },
 382     { "default_keytab_modify_name", krb5_config_string, NULL },
 383     { "default_keytab_name", krb5_config_string, NULL },
 384     { "default_realm", krb5_config_string, NULL },
 385     { "dns_canonize_hostname", krb5_config_string, check_boolean },
 386     { "dns_proxy", krb5_config_string, NULL },
 387     { "dns_lookup_kdc", krb5_config_string, check_boolean },
 388     { "dns_lookup_realm", krb5_config_string, check_boolean },
 389     { "dns_lookup_realm_labels", krb5_config_string, NULL },
 390     { "egd_socket", krb5_config_string, NULL },
 391     { "encrypt", krb5_config_string, check_boolean },
 392     { "extra_addresses", krb5_config_string, NULL },
 393     { "fcache_version", krb5_config_string, check_numeric },
 394     { "fcc-mit-ticketflags", krb5_config_string, check_boolean },
 395     { "forward", krb5_config_string, check_boolean },
 396     { "forwardable", krb5_config_string, check_boolean },
 397     { "http_proxy", krb5_config_string, check_host /* XXX */ },
 398     { "ignore_addresses", krb5_config_string, NULL },
 399     { "kdc_timeout", krb5_config_string, check_time },
 400     { "kdc_timesync", krb5_config_string, check_boolean },
 401     { "log_utc", krb5_config_string, check_boolean },
 402     { "maxretries", krb5_config_string, check_numeric },
 403     { "scan_interfaces", krb5_config_string, check_boolean },
 404     { "srv_lookup", krb5_config_string, check_boolean },
 405     { "srv_try_txt", krb5_config_string, check_boolean },
 406     { "ticket_lifetime", krb5_config_string, check_time },
 407     { "time_format", krb5_config_string, NULL },
 408     { "transited_realms_reject", krb5_config_string, NULL },
 409     { "no-addresses", krb5_config_string, check_boolean },
 410     { "v4_instance_resolve", krb5_config_string, check_boolean },
 411     { "v4_name_convert", krb5_config_list, v4_name_convert_entries },
 412     { "verify_ap_req_nofail", krb5_config_string, check_boolean },
 413     { "max_retries", krb5_config_string, check_time },
 414     { "renew_lifetime", krb5_config_string, check_time },
 415     { "proxiable", krb5_config_string, check_boolean },
 416     { "warn_pwexpire", krb5_config_string, check_time },
 417     /* MIT stuff */
 418     { "permitted_enctypes", krb5_config_string, mit_entry },
 419     { "default_tgs_enctypes", krb5_config_string, mit_entry },
 420     { "default_tkt_enctypes", krb5_config_string, mit_entry },
 421     { NULL }
 422 };
 423
 424 struct entry appdefaults_entries[] = {
 425     { "afslog", krb5_config_string, check_boolean },
 426     { "afs-use-524", krb5_config_string, check_524 },
 427     { "encrypt", krb5_config_string, check_boolean },
 428     { "forward", krb5_config_string, check_boolean },
 429     { "forwardable", krb5_config_string, check_boolean },
 430     { "proxiable", krb5_config_string, check_boolean },
 431     { "ticket_lifetime", krb5_config_string, check_time },
 432     { "renew_lifetime", krb5_config_string, check_time },
 433     { "no-addresses", krb5_config_string, check_boolean },
 434     { "krb4_get_tickets", krb5_config_string, check_boolean },
 435     { "pkinit_anchors", krb5_config_string, NULL },
 436     { "pkinit_win2k", krb5_config_string, NULL },
 437     { "pkinit_win2k_require_binding", krb5_config_string, NULL },
 438     { "pkinit_require_eku", krb5_config_string, NULL },
 439     { "pkinit_require_krbtgt_otherName", krb5_config_string, NULL },
 440     { "pkinit_require_hostname_match", krb5_config_string, NULL },
 441 #if 0
 442     { "anonymous", krb5_config_string, check_boolean },
 443 #endif
 444     { "", krb5_config_list, appdefaults_entries },
 445     { NULL }
 446 };
 447
 448 struct entry realms_entries[] = {
 449     { "forwardable", krb5_config_string, check_boolean },
 450     { "proxiable", krb5_config_string, check_boolean },
 451     { "ticket_lifetime", krb5_config_string, check_time },
 452     { "renew_lifetime", krb5_config_string, check_time },
 453     { "warn_pwexpire", krb5_config_string, check_time },
 454     { "kdc", krb5_config_string, check_host },
 455     { "admin_server", krb5_config_string, check_host },
 456     { "kpasswd_server", krb5_config_string, check_host },
 457     { "krb524_server", krb5_config_string, check_host },
 458     { "v4_name_convert", krb5_config_list, v4_name_convert_entries },
 459     { "v4_instance_convert", krb5_config_list, all_strings },
 460     { "v4_domains", krb5_config_string, NULL },
 461     { "default_domain", krb5_config_string, NULL },
 462     { "win2k_pkinit", krb5_config_string, NULL },
 463     /* MIT stuff */
 464     { "admin_keytab", krb5_config_string, mit_entry },
 465     { "acl_file", krb5_config_string, mit_entry },
 466     { "dict_file", krb5_config_string, mit_entry },
 467     { "kadmind_port", krb5_config_string, mit_entry },
 468     { "kpasswd_port", krb5_config_string, mit_entry },
 469     { "master_key_name", krb5_config_string, mit_entry },
 470     { "master_key_type", krb5_config_string, mit_entry },
 471     { "key_stash_file", krb5_config_string, mit_entry },
 472     { "max_life", krb5_config_string, mit_entry },
 473     { "max_renewable_life", krb5_config_string, mit_entry },
 474     { "default_principal_expiration", krb5_config_string, mit_entry },
 475     { "default_principal_flags", krb5_config_string, mit_entry },
 476     { "supported_enctypes", krb5_config_string, mit_entry },
 477     { "database_name", krb5_config_string, mit_entry },
 478     { NULL }
 479 };
 480
 481 struct entry realms_foobar[] = {
 482     { "", krb5_config_list, realms_entries },
 483     { NULL }
 484 };
 485
 486
 487 struct entry kdc_database_entries[] = {
 488     { "realm", krb5_config_string, NULL },
 489     { "dbname", krb5_config_string, NULL },
 490     { "mkey_file", krb5_config_string, NULL },
 491     { "acl_file", krb5_config_string, NULL },
 492     { "log_file", krb5_config_string, NULL },
 493     { NULL }
 494 };
 495
 496 struct entry kdc_entries[] = {
 497     { "database", krb5_config_list, kdc_database_entries },
 498     { "key-file", krb5_config_string, NULL },
 499     { "logging", krb5_config_string, check_log },
 500     { "max-request", krb5_config_string, check_bytes },
 501     { "require-preauth", krb5_config_string, check_boolean },
 502     { "ports", krb5_config_string, NULL },
 503     { "addresses", krb5_config_string, NULL },
 504     { "enable-kerberos4", krb5_config_string, check_boolean },
 505     { "enable-524", krb5_config_string, check_boolean },
 506     { "enable-http", krb5_config_string, check_boolean },
 507     { "check-ticket-addresses", krb5_config_string, check_boolean },
 508     { "allow-null-ticket-addresses", krb5_config_string, check_boolean },
 509     { "allow-anonymous", krb5_config_string, check_boolean },
 510     { "v4_realm", krb5_config_string, NULL },
 511     { "enable-kaserver", krb5_config_string, check_boolean },
 512     { "encode_as_rep_as_tgs_rep", krb5_config_string, check_boolean },
 513     { "kdc_warn_pwexpire", krb5_config_string, check_time },
 514     { "use_2b", krb5_config_list, NULL },
 515     { "enable-pkinit", krb5_config_string, check_boolean },
 516     { "pkinit_identity", krb5_config_string, NULL },
 517     { "pkinit_anchors", krb5_config_string, NULL },
 518     { "pkinit_pool", krb5_config_string, NULL },
 519     { "pkinit_revoke", krb5_config_string, NULL },
 520     { "pkinit_kdc_ocsp", krb5_config_string, NULL },
 521     { "pkinit_principal_in_certificate", krb5_config_string, NULL },
 522     { "pkinit_dh_min_bits", krb5_config_string, NULL },
 523     { "pkinit_allow_proxy_certificate", krb5_config_string, NULL },
 524     { "hdb-ldap-create-base", krb5_config_string, NULL },
 525     { "v4-realm", krb5_config_string, NULL },
 526     { NULL }
 527 };
 528
 529 struct entry kadmin_entries[] = {
 530     { "password_lifetime", krb5_config_string, check_time },
 531     { "default_keys", krb5_config_string, NULL },
 532     { "use_v4_salt", krb5_config_string, NULL },
 533     { "require-preauth", krb5_config_string, check_boolean },
 534     { NULL }
 535 };
 536 struct entry log_strings[] = {
 537     { "", krb5_config_string, check_log },
 538     { NULL }
 539 };
 540
 541
 542 /* MIT stuff */
 543 struct entry kdcdefaults_entries[] = {
 544     { "kdc_ports", krb5_config_string, mit_entry },
 545     { "v4_mode", krb5_config_string, mit_entry },
 546     { NULL }
 547 };
 548
 549 struct entry capaths_entries[] = {
 550     { "", krb5_config_list, all_strings },
 551     { NULL }
 552 };
 553
 554 struct entry password_quality_entries[] = {
 555     { "policies", krb5_config_string, NULL },
 556     { "external_program", krb5_config_string, NULL },
 557     { "min_classes", krb5_config_string, check_numeric },
 558     { "min_length", krb5_config_string, check_numeric },
 559     { "", krb5_config_list, all_strings },
 560     { NULL }
 561 };
 562
 563 struct entry toplevel_sections[] = {
 564     { "libdefaults" , krb5_config_list, libdefaults_entries },
 565     { "realms", krb5_config_list, realms_foobar },
 566     { "domain_realm", krb5_config_list, all_strings },
 567     { "logging", krb5_config_list, log_strings },
 568     { "kdc", krb5_config_list, kdc_entries },
 569     { "kadmin", krb5_config_list, kadmin_entries },
 570     { "appdefaults", krb5_config_list, appdefaults_entries },
 571     { "gssapi", krb5_config_list, NULL },
 572     { "capaths", krb5_config_list, capaths_entries },
 573     { "password_quality", krb5_config_list, password_quality_entries },
 574     /* MIT stuff */
 575     { "kdcdefaults", krb5_config_list, kdcdefaults_entries },
 576     { NULL }
 577 };
 578
 579
 580 static int
 581 check_section(krb5_context context, const char *path, krb5_config_section *cf,
 582               struct entry *entries)
 583 {
 584     int error = 0;
 585     krb5_config_section *p;
 586     struct entry *e;
 587
 588     char *local;
 589
 590     for(p = cf; p != NULL; p = p->next) {
 591         local = NULL;
 592         if (asprintf(&local, "%s/%s", path, p->name) < 0 || local == NULL)
 593             errx(1, "out of memory");
 594         for(e = entries; e->name != NULL; e++) {
 595             if(*e->name == '\0' || strcmp(e->name, p->name) == 0) {
 596                 if(e->type != p->type) {
 597                     krb5_warnx(context, "%s: unknown or wrong type", local);
 598                     error |= 1;
 599                 } else if(p->type == krb5_config_string && e->check_data != NULL) {
 600                     error |= (*(check_func_t)e->check_data)(context, local, p->u.string);
 601                 } else if(p->type == krb5_config_list && e->check_data != NULL) {
 602                     error |= check_section(context, local, p->u.list, e->check_data);
 603                 }
 604                 if(e->deprecated) {
 605                     krb5_warnx(context, "%s: is a deprecated entry", local);
 606                     error |= 1;
 607                 }
 608                 break;
 609             }
 610         }
 611         if(e->name == NULL) {
 612             krb5_warnx(context, "%s: unknown entry", local);
 613             error |= 1;
 614         }
 615         free(local);
 616     }
 617     return error;
 618 }
 619
 620
 621 static void
 622 dumpconfig(int level, krb5_config_section *top)
 623 {
 624     krb5_config_section *x;
 625     for(x = top; x; x = x->next) {
 626         switch(x->type) {
 627         case krb5_config_list:
 628             if(level == 0) {
 629                 printf("[%s]\n", x->name);
 630             } else {
 631                 printf("%*s%s = {\n", 4 * level, " ", x->name);
 632             }
 633             dumpconfig(level + 1, x->u.list);
 634             if(level > 0)
 635                 printf("%*s}\n", 4 * level, " ");
 636             break;
 637         case krb5_config_string:
 638             printf("%*s%s = %s\n", 4 * level, " ", x->name, x->u.string);
 639             break;
 640         }
 641     }
 642 }
 643
 644 int
 645 main(int argc, char **argv)
 646 {
 647     krb5_context context;
 648     krb5_error_code ret;
 649     krb5_config_section *tmp_cf;
 650     int optidx = 0;
 651
 652     setprogname (argv[0]);
 653
 654     ret = krb5_init_context(&context);
 655     if (ret == KRB5_CONFIG_BADFORMAT)
 656         errx (1, "krb5_init_context failed to parse configuration file");
 657     else if (ret)
 658         errx (1, "krb5_init_context failed with %d", ret);
 659
 660     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 661         usage(1);
 662
 663     if (help_flag)
 664         usage (0);
 665
 666     if(version_flag){
 667         print_version(NULL);
 668         exit(0);
 669     }
 670
 671     argc -= optidx;
 672     argv += optidx;
 673
 674     tmp_cf = NULL;
 675     if(argc == 0)
 676         krb5_get_default_config_files(&argv);
 677
 678     while(*argv) {
 679         ret = krb5_config_parse_file_multi(context, *argv, &tmp_cf);
 680         if (ret != 0)
 681             krb5_warn (context, ret, "krb5_config_parse_file");
 682         argv++;
 683     }
 684
 685     if(dumpconfig_flag)
 686         dumpconfig(0, tmp_cf);
 687
 688     return check_section(context, "", tmp_cf, toplevel_sections);
 689 }