crypto/dist/heimdal/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 __RCSID("$Heimdal: verify_krb5_conf.c 22233 2007-12-08 21:43:37Z lha $"
  39         "$NetBSD$");
  40
  41 /* verify krb5.conf */
  42
  43 static int dumpconfig_flag = 0;
  44 static int version_flag = 0;
  45 static int help_flag    = 0;
  46 static int warn_mit_syntax_flag = 0;
  47
  48 static struct getargs args[] = {
  49     {"dumpconfig", 0,      arg_flag,       &dumpconfig_flag,
  50      "show the parsed config files", NULL },
  51     {"warn-mit-syntax", 0, arg_flag,       &warn_mit_syntax_flag,
  52      "show the parsed config files", NULL },
  53     {"version", 0,      arg_flag,       &version_flag,
  54      "print version", NULL },
  55     {"help",    0,      arg_flag,       &help_flag,
  56      NULL, NULL }
  57 };
  58
  59 static void
  60 usage (int ret)
  61 {
  62     arg_printusage (args,
  63                     sizeof(args)/sizeof(*args),
  64                     NULL,
  65                     "[config-file]");
  66     exit (ret);
  67 }
  68
  69 static int
  70 check_bytes(krb5_context context, const char *path, char *data)
  71 {
  72     if(parse_bytes(data, NULL) == -1) {
  73         krb5_warnx(context, "%s: failed to parse \"%s\" as size", path, data);
  74         return 1;
  75     }
  76     return 0;
  77 }
  78
  79 static int
  80 check_time(krb5_context context, const char *path, char *data)
  81 {
  82     if(parse_time(data, NULL) == -1) {
  83         krb5_warnx(context, "%s: failed to parse \"%s\" as time", path, data);
  84         return 1;
  85     }
  86     return 0;
  87 }
  88
  89 static int
  90 check_numeric(krb5_context context, const char *path, char *data)
  91 {
  92     long int v;
  93     char *end;
  94     v = strtol(data, &end, 0);
  95     if(*end != '\0') {
  96         krb5_warnx(context, "%s: failed to parse \"%s\" as a number",
  97                    path, data);
  98         return 1;
  99     }
 100     return 0;
 101 }
 102
 103 static int
 104 check_boolean(krb5_context context, const char *path, char *data)
 105 {
 106     long int v;
 107     char *end;
 108     if(strcasecmp(data, "yes") == 0 ||
 109        strcasecmp(data, "true") == 0 ||
 110        strcasecmp(data, "no") == 0 ||
 111        strcasecmp(data, "false") == 0)
 112         return 0;
 113     v = strtol(data, &end, 0);
 114     if(*end != '\0') {
 115         krb5_warnx(context, "%s: failed to parse \"%s\" as a boolean",
 116                    path, data);
 117         return 1;
 118     }
 119     if(v != 0 && v != 1)
 120         krb5_warnx(context, "%s: numeric value \"%s\" is treated as \"true\"",
 121                    path, data);
 122     return 0;
 123 }
 124
 125 static int
 126 check_524(krb5_context context, const char *path, char *data)
 127 {
 128     if(strcasecmp(data, "yes") == 0 ||
 129        strcasecmp(data, "no") == 0 ||
 130        strcasecmp(data, "2b") == 0 ||
 131        strcasecmp(data, "local") == 0)
 132         return 0;
 133
 134     krb5_warnx(context, "%s: didn't contain a valid option `%s'",
 135                path, data);
 136     return 1;
 137 }
 138
 139 static int
 140 check_host(krb5_context context, const char *path, char *data)
 141 {
 142     int ret;
 143     char hostname[128];
 144     const char *p = data;
 145     struct addrinfo hints;
 146     char service[32];
 147     int defport;
 148     struct addrinfo *ai;
 149
 150     hints.ai_flags = 0;
 151     hints.ai_family = PF_UNSPEC;
 152     hints.ai_socktype = 0;
 153     hints.ai_protocol = 0;
 154
 155     hints.ai_addrlen = 0;
 156     hints.ai_canonname = NULL;
 157     hints.ai_addr = NULL;
 158     hints.ai_next = NULL;
 159
 160     /* XXX data could be a list of hosts that this code can't handle */
 161     /* XXX copied from krbhst.c */
 162     if(strncmp(p, "http://", 7) == 0){
 163         p += 7;
 164         hints.ai_socktype = SOCK_STREAM;
 165         strlcpy(service, "http", sizeof(service));
 166         defport = 80;
 167     } else if(strncmp(p, "http/", 5) == 0) {
 168         p += 5;
 169         hints.ai_socktype = SOCK_STREAM;
 170         strlcpy(service, "http", sizeof(service));
 171         defport = 80;
 172     }else if(strncmp(p, "tcp/", 4) == 0){
 173         p += 4;
 174         hints.ai_socktype = SOCK_STREAM;
 175         strlcpy(service, "kerberos", sizeof(service));
 176         defport = 88;
 177     } else if(strncmp(p, "udp/", 4) == 0) {
 178         p += 4;
 179         hints.ai_socktype = SOCK_DGRAM;
 180         strlcpy(service, "kerberos", sizeof(service));
 181         defport = 88;
 182     } else {
 183         hints.ai_socktype = SOCK_DGRAM;
 184         strlcpy(service, "kerberos", sizeof(service));
 185         defport = 88;
 186     }
 187     if(strsep_copy(&p, ":", hostname, sizeof(hostname)) < 0) {
 188         return 1;
 189     }
 190     hostname[strcspn(hostname, "/")] = '\0';
 191     if(p != NULL) {
 192         char *end;
 193         int tmp = strtol(p, &end, 0);
 194         if(end == p) {
 195             krb5_warnx(context, "%s: failed to parse port number in %s",
 196                        path, data);
 197             return 1;
 198         }
 199         defport = tmp;
 200         snprintf(service, sizeof(service), "%u", defport);
 201     }
 202     ret = getaddrinfo(hostname, service, &hints, &ai);
 203     if(ret == EAI_SERVICE && !isdigit((unsigned char)service[0])) {
 204         snprintf(service, sizeof(service), "%u", defport);
 205         ret = getaddrinfo(hostname, service, &hints, &ai);
 206     }
 207     if(ret != 0) {
 208         krb5_warnx(context, "%s: %s (%s)", path, gai_strerror(ret), hostname);
 209         return 1;
 210     }
 211     return 0;
 212 }
 213
 214 static int
 215 mit_entry(krb5_context context, const char *path, char *data)
 216 {
 217     if (warn_mit_syntax_flag)
 218         krb5_warnx(context, "%s is only used by MIT Kerberos", path);
 219     return 0;
 220 }
 221
 222 struct s2i {
 223     const char *s;
 224     int val;
 225 };
 226
 227 #define L(X) { #X, LOG_ ## X }
 228
 229 static struct s2i syslogvals[] = {
 230     /* severity */
 231     L(EMERG),
 232     L(ALERT),
 233     L(CRIT),
 234     L(ERR),
 235     L(WARNING),
 236     L(NOTICE),
 237     L(INFO),
 238     L(DEBUG),
 239     /* facility */
 240     L(AUTH),
 241 #ifdef LOG_AUTHPRIV
 242     L(AUTHPRIV),
 243 #endif
 244 #ifdef LOG_CRON
 245     L(CRON),
 246 #endif
 247     L(DAEMON),
 248 #ifdef LOG_FTP
 249     L(FTP),
 250 #endif
 251     L(KERN),
 252     L(LPR),
 253     L(MAIL),
 254 #ifdef LOG_NEWS
 255     L(NEWS),
 256 #endif
 257     L(SYSLOG),
 258     L(USER),
 259 #ifdef LOG_UUCP
 260     L(UUCP),
 261 #endif
 262     L(LOCAL0),
 263     L(LOCAL1),
 264     L(LOCAL2),
 265     L(LOCAL3),
 266     L(LOCAL4),
 267     L(LOCAL5),
 268     L(LOCAL6),
 269     L(LOCAL7),
 270     { NULL, -1 }
 271 };
 272
 273 static int
 274 find_value(const char *s, struct s2i *table)
 275 {
 276     while(table->s && strcasecmp(table->s, s))
 277         table++;
 278     return table->val;
 279 }
 280
 281 static int
 282 check_log(krb5_context context, const char *path, char *data)
 283 {
 284     /* XXX sync with log.c */
 285     int min = 0, max = -1, n;
 286     char c;
 287     const char *p = data;
 288
 289     n = sscanf(p, "%d%c%d/", &min, &c, &max);
 290     if(n == 2){
 291         if(c == '/') {
 292             if(min < 0){
 293                 max = -min;
 294                 min = 0;
 295             }else{
 296                 max = min;
 297             }
 298         }
 299     }
 300     if(n){
 301         p = strchr(p, '/');
 302         if(p == NULL) {
 303             krb5_warnx(context, "%s: failed to parse \"%s\"", path, data);
 304             return 1;
 305         }
 306         p++;
 307     }
 308     if(strcmp(p, "STDERR") == 0 ||
 309        strcmp(p, "CONSOLE") == 0 ||
 310        (strncmp(p, "FILE", 4) == 0 && (p[4] == ':' || p[4] == '=')) ||
 311        (strncmp(p, "DEVICE", 6) == 0 && p[6] == '='))
 312         return 0;
 313     if(strncmp(p, "SYSLOG", 6) == 0){
 314         int ret = 0;
 315         char severity[128] = "";
 316         char facility[128] = "";
 317         p += 6;
 318         if(*p != '\0')
 319             p++;
 320         if(strsep_copy(&p, ":", severity, sizeof(severity)) != -1)
 321             strsep_copy(&p, ":", facility, sizeof(facility));
 322         if(*severity == '\0')
 323             strlcpy(severity, "ERR", sizeof(severity));
 324         if(*facility == '\0')
 325             strlcpy(facility, "AUTH", sizeof(facility));
 326         if(find_value(severity, syslogvals) == -1) {
 327             krb5_warnx(context, "%s: unknown syslog facility \"%s\"",
 328                        path, facility);
 329             ret++;
 330         }
 331         if(find_value(severity, syslogvals) == -1) {
 332             krb5_warnx(context, "%s: unknown syslog severity \"%s\"",
 333                        path, severity);
 334             ret++;
 335         }
 336         return ret;
 337     }else{
 338         krb5_warnx(context, "%s: unknown log type: \"%s\"", path, data);
 339         return 1;
 340     }
 341 }
 342
 343 typedef int (*check_func_t)(krb5_context, const char*, char*);
 344 struct entry {
 345     const char *name;
 346     int type;
 347     void *check_data;
 348 };
 349
 350 struct entry all_strings[] = {
 351     { "", krb5_config_string, NULL },
 352     { NULL }
 353 };
 354
 355 struct entry all_boolean[] = {
 356     { "", krb5_config_string, check_boolean },
 357     { NULL }
 358 };
 359
 360
 361 struct entry v4_name_convert_entries[] = {
 362     { "host", krb5_config_list, all_strings },
 363     { "plain", krb5_config_list, all_strings },
 364     { NULL }
 365 };
 366
 367 struct entry libdefaults_entries[] = {
 368     { "accept_null_addresses", krb5_config_string, check_boolean },
 369     { "capath", krb5_config_list, all_strings },
 370     { "check_pac", krb5_config_string, check_boolean },
 371     { "clockskew", krb5_config_string, check_time },
 372     { "date_format", krb5_config_string, NULL },
 373     { "default_cc_name", krb5_config_string, NULL },
 374     { "default_etypes", krb5_config_string, NULL },
 375     { "default_etypes_des", krb5_config_string, NULL },
 376     { "default_keytab_modify_name", krb5_config_string, NULL },
 377     { "default_keytab_name", krb5_config_string, NULL },
 378     { "default_realm", krb5_config_string, NULL },
 379     { "dns_canonize_hostname", krb5_config_string, check_boolean },
 380     { "dns_proxy", krb5_config_string, NULL },
 381     { "dns_lookup_kdc", krb5_config_string, check_boolean },
 382     { "dns_lookup_realm", krb5_config_string, check_boolean },
 383     { "dns_lookup_realm_labels", krb5_config_string, NULL },
 384     { "egd_socket", krb5_config_string, NULL },
 385     { "encrypt", krb5_config_string, check_boolean },
 386     { "extra_addresses", krb5_config_string, NULL },
 387     { "fcache_version", krb5_config_string, check_numeric },
 388     { "fcc-mit-ticketflags", krb5_config_string, check_boolean },
 389     { "forward", krb5_config_string, check_boolean },
 390     { "forwardable", krb5_config_string, check_boolean },
 391     { "http_proxy", krb5_config_string, check_host /* XXX */ },
 392     { "ignore_addresses", krb5_config_string, NULL },
 393     { "kdc_timeout", krb5_config_string, check_time },
 394     { "kdc_timesync", krb5_config_string, check_boolean },
 395     { "log_utc", krb5_config_string, check_boolean },
 396     { "maxretries", krb5_config_string, check_numeric },
 397     { "scan_interfaces", krb5_config_string, check_boolean },
 398     { "srv_lookup", krb5_config_string, check_boolean },
 399     { "srv_try_txt", krb5_config_string, check_boolean },
 400     { "ticket_lifetime", krb5_config_string, check_time },
 401     { "time_format", krb5_config_string, NULL },
 402     { "transited_realms_reject", krb5_config_string, NULL },
 403     { "no-addresses", krb5_config_string, check_boolean },
 404     { "v4_instance_resolve", krb5_config_string, check_boolean },
 405     { "v4_name_convert", krb5_config_list, v4_name_convert_entries },
 406     { "verify_ap_req_nofail", krb5_config_string, check_boolean },
 407     { "max_retries", krb5_config_string, check_time },
 408     { "renew_lifetime", krb5_config_string, check_time },
 409     { "proxiable", krb5_config_string, check_boolean },
 410     { "warn_pwexpire", krb5_config_string, check_time },
 411     /* MIT stuff */
 412     { "permitted_enctypes", krb5_config_string, mit_entry },
 413     { "default_tgs_enctypes", krb5_config_string, mit_entry },
 414     { "default_tkt_enctypes", krb5_config_string, mit_entry },
 415     { NULL }
 416 };
 417
 418 struct entry appdefaults_entries[] = {
 419     { "afslog", krb5_config_string, check_boolean },
 420     { "afs-use-524", krb5_config_string, check_524 },
 421     { "encrypt", krb5_config_string, check_boolean },
 422     { "forward", krb5_config_string, check_boolean },
 423     { "forwardable", krb5_config_string, check_boolean },
 424     { "proxiable", krb5_config_string, check_boolean },
 425     { "ticket_lifetime", krb5_config_string, check_time },
 426     { "renew_lifetime", krb5_config_string, check_time },
 427     { "no-addresses", krb5_config_string, check_boolean },
 428     { "krb4_get_tickets", krb5_config_string, check_boolean },
 429     { "pkinit_anchors", krb5_config_string, NULL },
 430     { "pkinit_win2k", krb5_config_string, NULL },
 431     { "pkinit_win2k_require_binding", krb5_config_string, NULL },
 432     { "pkinit_require_eku", krb5_config_string, NULL },
 433     { "pkinit_require_krbtgt_otherName", krb5_config_string, NULL },
 434     { "pkinit_require_hostname_match", krb5_config_string, NULL },
 435 #if 0
 436     { "anonymous", krb5_config_string, check_boolean },
 437 #endif
 438     { "", krb5_config_list, appdefaults_entries },
 439     { NULL }
 440 };
 441
 442 struct entry realms_entries[] = {
 443     { "forwardable", krb5_config_string, check_boolean },
 444     { "proxiable", krb5_config_string, check_boolean },
 445     { "ticket_lifetime", krb5_config_string, check_time },
 446     { "renew_lifetime", krb5_config_string, check_time },
 447     { "warn_pwexpire", krb5_config_string, check_time },
 448     { "kdc", krb5_config_string, check_host },
 449     { "admin_server", krb5_config_string, check_host },
 450     { "kpasswd_server", krb5_config_string, check_host },
 451     { "krb524_server", krb5_config_string, check_host },
 452     { "v4_name_convert", krb5_config_list, v4_name_convert_entries },
 453     { "v4_instance_convert", krb5_config_list, all_strings },
 454     { "v4_domains", krb5_config_string, NULL },
 455     { "default_domain", krb5_config_string, NULL },
 456     { "win2k_pkinit", krb5_config_string, NULL },
 457     /* MIT stuff */
 458     { "admin_keytab", krb5_config_string, mit_entry },
 459     { "acl_file", krb5_config_string, mit_entry },
 460     { "dict_file", krb5_config_string, mit_entry },
 461     { "kadmind_port", krb5_config_string, mit_entry },
 462     { "kpasswd_port", krb5_config_string, mit_entry },
 463     { "master_key_name", krb5_config_string, mit_entry },
 464     { "master_key_type", krb5_config_string, mit_entry },
 465     { "key_stash_file", krb5_config_string, mit_entry },
 466     { "max_life", krb5_config_string, mit_entry },
 467     { "max_renewable_life", krb5_config_string, mit_entry },
 468     { "default_principal_expiration", krb5_config_string, mit_entry },
 469     { "default_principal_flags", krb5_config_string, mit_entry },
 470     { "supported_enctypes", krb5_config_string, mit_entry },
 471     { "database_name", krb5_config_string, mit_entry },
 472     { NULL }
 473 };
 474
 475 struct entry realms_foobar[] = {
 476     { "", krb5_config_list, realms_entries },
 477     { NULL }
 478 };
 479
 480
 481 struct entry kdc_database_entries[] = {
 482     { "realm", krb5_config_string, NULL },
 483     { "dbname", krb5_config_string, NULL },
 484     { "mkey_file", krb5_config_string, NULL },
 485     { "acl_file", krb5_config_string, NULL },
 486     { "log_file", krb5_config_string, NULL },
 487     { NULL }
 488 };
 489
 490 struct entry kdc_entries[] = {
 491     { "database", krb5_config_list, kdc_database_entries },
 492     { "key-file", krb5_config_string, NULL },
 493     { "logging", krb5_config_string, check_log },
 494     { "max-request", krb5_config_string, check_bytes },
 495     { "require-preauth", krb5_config_string, check_boolean },
 496     { "ports", krb5_config_string, NULL },
 497     { "addresses", krb5_config_string, NULL },
 498     { "enable-kerberos4", krb5_config_string, check_boolean },
 499     { "enable-524", krb5_config_string, check_boolean },
 500     { "enable-http", krb5_config_string, check_boolean },
 501     { "check-ticket-addresses", krb5_config_string, check_boolean },
 502     { "allow-null-ticket-addresses", krb5_config_string, check_boolean },
 503     { "allow-anonymous", krb5_config_string, check_boolean },
 504     { "v4_realm", krb5_config_string, NULL },
 505     { "enable-kaserver", krb5_config_string, check_boolean },
 506     { "encode_as_rep_as_tgs_rep", krb5_config_string, check_boolean },
 507     { "kdc_warn_pwexpire", krb5_config_string, check_time },
 508     { "use_2b", krb5_config_list, NULL },
 509     { "enable-pkinit", krb5_config_string, check_boolean },
 510     { "pkinit_identity", krb5_config_string, NULL },
 511     { "pkinit_anchors", krb5_config_string, NULL },
 512     { "pkinit_pool", krb5_config_string, NULL },
 513     { "pkinit_revoke", krb5_config_string, NULL },
 514     { "pkinit_kdc_ocsp", krb5_config_string, NULL },
 515     { "pkinit_principal_in_certificate", krb5_config_string, NULL },
 516     { "pkinit_dh_min_bits", krb5_config_string, NULL },
 517     { "pkinit_allow_proxy_certificate", krb5_config_string, NULL },
 518     { "hdb-ldap-create-base", krb5_config_string, NULL },
 519     { "v4-realm", krb5_config_string, NULL },
 520     { NULL }
 521 };
 522
 523 struct entry kadmin_entries[] = {
 524     { "password_lifetime", krb5_config_string, check_time },
 525     { "default_keys", krb5_config_string, NULL },
 526     { "use_v4_salt", krb5_config_string, NULL },
 527     { "require-preauth", krb5_config_string, check_boolean },
 528     { NULL }
 529 };
 530 struct entry log_strings[] = {
 531     { "", krb5_config_string, check_log },
 532     { NULL }
 533 };
 534
 535
 536 /* MIT stuff */
 537 struct entry kdcdefaults_entries[] = {
 538     { "kdc_ports", krb5_config_string, mit_entry },
 539     { "v4_mode", krb5_config_string, mit_entry },
 540     { NULL }
 541 };
 542
 543 struct entry capaths_entries[] = {
 544     { "", krb5_config_list, all_strings },
 545     { NULL }
 546 };
 547
 548 struct entry password_quality_entries[] = {
 549     { "policies", krb5_config_string, NULL },
 550     { "external_program", krb5_config_string, NULL },
 551     { "min_classes", krb5_config_string, check_numeric },
 552     { "min_length", krb5_config_string, check_numeric },
 553     { "", krb5_config_list, all_strings },
 554     { NULL }
 555 };
 556
 557 struct entry toplevel_sections[] = {
 558     { "libdefaults" , krb5_config_list, libdefaults_entries },
 559     { "realms", krb5_config_list, realms_foobar },
 560     { "domain_realm", krb5_config_list, all_strings },
 561     { "logging", krb5_config_list, log_strings },
 562     { "kdc", krb5_config_list, kdc_entries },
 563     { "kadmin", krb5_config_list, kadmin_entries },
 564     { "appdefaults", krb5_config_list, appdefaults_entries },
 565     { "gssapi", krb5_config_list, NULL },
 566     { "capaths", krb5_config_list, capaths_entries },
 567     { "password_quality", krb5_config_list, password_quality_entries },
 568     /* MIT stuff */
 569     { "kdcdefaults", krb5_config_list, kdcdefaults_entries },
 570     { NULL }
 571 };
 572
 573
 574 static int
 575 check_section(krb5_context context, const char *path, krb5_config_section *cf,
 576               struct entry *entries)
 577 {
 578     int error = 0;
 579     krb5_config_section *p;
 580     struct entry *e;
 581
 582     char *local;
 583
 584     for(p = cf; p != NULL; p = p->next) {
 585         asprintf(&local, "%s/%s", path, p->name);
 586         for(e = entries; e->name != NULL; e++) {
 587             if(*e->name == '\0' || strcmp(e->name, p->name) == 0) {
 588                 if(e->type != p->type) {
 589                     krb5_warnx(context, "%s: unknown or wrong type", local);
 590                     error |= 1;
 591                 } else if(p->type == krb5_config_string && e->check_data != NULL) {
 592                     error |= (*(check_func_t)e->check_data)(context, local, p->u.string);
 593                 } else if(p->type == krb5_config_list && e->check_data != NULL) {
 594                     error |= check_section(context, local, p->u.list, e->check_data);
 595                 }
 596                 break;
 597             }
 598         }
 599         if(e->name == NULL) {
 600             krb5_warnx(context, "%s: unknown entry", local);
 601             error |= 1;
 602         }
 603         free(local);
 604     }
 605     return error;
 606 }
 607
 608
 609 static void
 610 dumpconfig(int level, krb5_config_section *top)
 611 {
 612     krb5_config_section *x;
 613     for(x = top; x; x = x->next) {
 614         switch(x->type) {
 615         case krb5_config_list:
 616             if(level == 0) {
 617                 printf("[%s]\n", x->name);
 618             } else {
 619                 printf("%*s%s = {\n", 4 * level, " ", x->name);
 620             }
 621             dumpconfig(level + 1, x->u.list);
 622             if(level > 0)
 623                 printf("%*s}\n", 4 * level, " ");
 624             break;
 625         case krb5_config_string:
 626             printf("%*s%s = %s\n", 4 * level, " ", x->name, x->u.string);
 627             break;
 628         }
 629     }
 630 }
 631
 632 int
 633 main(int argc, char **argv)
 634 {
 635     krb5_context context;
 636     krb5_error_code ret;
 637     krb5_config_section *tmp_cf;
 638     int optidx = 0;
 639
 640     setprogname (argv[0]);
 641
 642     ret = krb5_init_context(&context);
 643     if (ret == KRB5_CONFIG_BADFORMAT)
 644         errx (1, "krb5_init_context failed to parse configuration file");
 645     else if (ret)
 646         errx (1, "krb5_init_context failed with %d", ret);
 647
 648     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 649         usage(1);
 650
 651     if (help_flag)
 652         usage (0);
 653
 654     if(version_flag){
 655         print_version(NULL);
 656         exit(0);
 657     }
 658
 659     argc -= optidx;
 660     argv += optidx;
 661
 662     tmp_cf = NULL;
 663     if(argc == 0)
 664         krb5_get_default_config_files(&argv);
 665
 666     while(*argv) {
 667         ret = krb5_config_parse_file_multi(context, *argv, &tmp_cf);
 668         if (ret != 0)
 669             krb5_warn (context, ret, "krb5_config_parse_file");
 670         argv++;
 671     }
 672
 673     if(dumpconfig_flag)
 674         dumpconfig(0, tmp_cf);
 675
 676     return check_section(context, "", tmp_cf, toplevel_sections);
 677 }