kdc/config.c

   1 /*
   2  * Copyright (c) 1997-2000 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 "kdc_locl.h"
  35 #include <getarg.h>
  36 #include <parse_bytes.h>
  37
  38 RCSID("$Id$");
  39
  40 static char *config_file;       /* location of kdc config file */
  41
  42 int require_preauth = -1;       /* 1 == require preauth for all principals */
  43
  44 size_t max_request;             /* maximal size of a request */
  45
  46 static char *max_request_str;   /* `max_request' as a string */
  47
  48 time_t kdc_warn_pwexpire;       /* time before expiration to print a warning */
  49
  50 struct dbinfo *databases;
  51 HDB **db;
  52 int num_db;
  53
  54 char *port_str;
  55
  56 int enable_http = -1;
  57 krb5_boolean encode_as_rep_as_tgs_rep; /* bug compatibility */
  58
  59 krb5_boolean check_ticket_addresses;
  60 krb5_boolean allow_null_ticket_addresses;
  61
  62 static struct getarg_strings addresses_str;     /* addresses to listen on */
  63 krb5_addresses explicit_addresses;
  64
  65 #ifdef KRB4
  66 char *v4_realm;
  67 #endif
  68 #ifdef KASERVER
  69 krb5_boolean enable_kaserver = -1;
  70 #endif
  71
  72 static int help_flag;
  73 static int version_flag;
  74
  75 static struct getargs args[] = {
  76     {
  77         "config-file",  'c',    arg_string,     &config_file,
  78         "location of config file",      "file"
  79     },
  80     {
  81         "require-preauth",      'p',    arg_negative_flag, &require_preauth,
  82         "don't require pa-data in as-reqs"
  83     },
  84     {
  85         "max-request",  0,      arg_string, &max_request,
  86         "max size for a kdc-request", "size"
  87     },
  88 #if 0
  89     {
  90         "database",     'd',    arg_string, &databases,
  91         "location of database", "database"
  92     },
  93 #endif
  94     { "enable-http", 'H', arg_flag, &enable_http, "turn on HTTP support" },
  95 #ifdef KRB4
  96     {
  97         "v4-realm",     'r',    arg_string, &v4_realm,
  98         "realm to serve v4-requests for"
  99     },
 100 #endif
 101 #ifdef KASERVER
 102     {
 103         "kaserver", 'K', arg_negative_flag,   &enable_kaserver,
 104         "turn off kaserver support"
 105     },
 106 #endif
 107     {   "ports",        'P',    arg_string, &port_str,
 108         "ports to listen to"
 109     },
 110     {   "addresses",    0,      arg_strings, &addresses_str,
 111         "addresses to listen on", "list of addresses" },
 112     {   "help",         'h',    arg_flag,   &help_flag },
 113     {   "version",      'v',    arg_flag,   &version_flag }
 114 };
 115
 116 static int num_args = sizeof(args) / sizeof(args[0]);
 117
 118 static void
 119 usage(int ret)
 120 {
 121     arg_printusage (args, num_args, NULL, "");
 122     exit (ret);
 123 }
 124
 125 static void
 126 get_dbinfo(krb5_config_section *cf)
 127 {
 128     krb5_config_binding *top_binding = NULL;
 129     krb5_config_binding *db_binding;
 130     krb5_config_binding *default_binding = NULL;
 131     struct dbinfo *di, **dt;
 132     const char *default_dbname = HDB_DEFAULT_DB;
 133     const char *default_mkey = HDB_DB_DIR "/m-key";
 134     const char *p;
 135
 136     databases = NULL;
 137     dt = &databases;
 138     while((db_binding = (krb5_config_binding *)
 139            krb5_config_get_next(context, cf, &top_binding,
 140                                 krb5_config_list,
 141                                 "kdc",
 142                                 "database",
 143                                 NULL))) {
 144         p = krb5_config_get_string(context, db_binding, "realm", NULL);
 145         if(p == NULL) {
 146             if(default_binding) {
 147                 krb5_warnx(context, "WARNING: more than one realm-less "
 148                            "database specification");
 149                 krb5_warnx(context, "WARNING: using the first encountered");
 150             } else
 151                 default_binding = db_binding;
 152             continue;
 153         }
 154         di = calloc(1, sizeof(*di));
 155         di->realm = strdup(p);
 156         p = krb5_config_get_string(context, db_binding, "dbname", NULL);
 157         if(p)
 158             di->dbname = strdup(p);
 159         p = krb5_config_get_string(context, db_binding, "mkey_file", NULL);
 160         if(p)
 161             di->mkey_file = strdup(p);
 162         *dt = di;
 163         dt = &di->next;
 164     }
 165     if(default_binding) {
 166         di = calloc(1, sizeof(*di));
 167         p = krb5_config_get_string(context, default_binding, "dbname", NULL);
 168         if(p) {
 169             di->dbname = strdup(p);
 170             default_dbname = p;
 171         }
 172         p = krb5_config_get_string(context, default_binding, "mkey_file", NULL);
 173         if(p) {
 174             di->mkey_file = strdup(p);
 175             default_mkey = p;
 176         }
 177         *dt = di;
 178         dt = &di->next;
 179     } else {
 180         di = calloc(1, sizeof(*di));
 181         di->dbname = strdup(default_dbname);
 182         di->mkey_file = strdup(default_mkey);
 183         *dt = di;
 184         dt = &di->next;
 185     }
 186     for(di = databases; di; di = di->next) {
 187         if(di->dbname == NULL)
 188             di->dbname = strdup(default_dbname);
 189         if(di->mkey_file == NULL) {
 190             p = strrchr(di->dbname, '.');
 191             if(p == NULL || strchr(p, '/') != NULL)
 192                 asprintf(&di->mkey_file, "%s.mkey", di->dbname);
 193             else
 194                 asprintf(&di->mkey_file, "%.*s.mkey",
 195                          (int)(p - di->dbname), di->dbname);
 196         }
 197     }
 198 }
 199
 200 static void
 201 add_one_address (const char *str, int first)
 202 {
 203     krb5_error_code ret;
 204     krb5_addresses tmp;
 205
 206     ret = krb5_parse_address (context, str, &tmp);
 207     if (ret)
 208         krb5_err (context, 1, ret, "parse_address `%s'", str);
 209     if (first)
 210         krb5_copy_addresses(context, &tmp, &explicit_addresses);
 211     else
 212         krb5_append_addresses(context, &explicit_addresses, &tmp);
 213     krb5_free_addresses (context, &tmp);
 214 }
 215
 216 void
 217 configure(int argc, char **argv)
 218 {
 219     krb5_config_section *cf = NULL;
 220     int optind = 0;
 221     int e;
 222     const char *p;
 223
 224     while((e = getarg(args, num_args, argc, argv, &optind)))
 225         warnx("error at argument `%s'", argv[optind]);
 226
 227     if(help_flag)
 228         usage (0);
 229
 230     if (version_flag) {
 231         print_version(NULL);
 232         exit(0);
 233     }
 234
 235     argc -= optind;
 236     argv += optind;
 237
 238     if (argc != 0)
 239         usage(1);
 240
 241     if(config_file == NULL)
 242         config_file = HDB_DB_DIR "/kdc.conf";
 243
 244     if(krb5_config_parse_file(config_file, &cf))
 245         cf = NULL;
 246
 247     get_dbinfo(cf);
 248
 249     if(max_request_str){
 250         max_request = parse_bytes(max_request_str, NULL);
 251     }
 252
 253     if(max_request == 0){
 254         p = krb5_config_get_string (context,
 255                                     cf,
 256                                     "kdc",
 257                                     "max-request",
 258                                     NULL);
 259         if(p)
 260             max_request = parse_bytes(p, NULL);
 261     }
 262
 263     if(require_preauth == -1)
 264         require_preauth = krb5_config_get_bool(context, cf, "kdc",
 265                                                "require-preauth", NULL);
 266
 267     if(port_str == NULL){
 268         p = krb5_config_get_string(context, cf, "kdc", "ports", NULL);
 269         if (p != NULL)
 270             port_str = strdup(p);
 271     }
 272
 273     explicit_addresses.len = 0;
 274
 275     if (addresses_str.num_strings) {
 276         int i;
 277
 278         for (i = 0; i < addresses_str.num_strings; ++i)
 279             add_one_address (addresses_str.strings[i], i == 0);
 280     } else {
 281         char **foo = krb5_config_get_strings (context, cf,
 282                                               "kdc", "addresses", NULL);
 283
 284         if (foo != NULL) {
 285             add_one_address (*foo++, TRUE);
 286             while (*foo)
 287                 add_one_address (*foo++, FALSE);
 288         }
 289     }
 290
 291     if(enable_http == -1)
 292         enable_http = krb5_config_get_bool(context, cf, "kdc",
 293                                            "enable-http", NULL);
 294     check_ticket_addresses =
 295         krb5_config_get_bool(context, cf, "kdc",
 296                              "check-ticket-addresses", NULL);
 297     allow_null_ticket_addresses =
 298         krb5_config_get_bool(context, cf, "kdc",
 299                              "allow-null-ticket-addresses", NULL);
 300 #ifdef KRB4
 301     if(v4_realm == NULL){
 302         p = krb5_config_get_string (context, cf,
 303                                     "kdc",
 304                                     "v4-realm",
 305                                     NULL);
 306         if(p)
 307             v4_realm = strdup(p);
 308     }
 309 #endif
 310 #ifdef KASERVER
 311     if (enable_kaserver == -1)
 312         enable_kaserver = krb5_config_get_bool_default(context, cf, TRUE,
 313                                                        "kdc",
 314                                                        "enable-kaserver",
 315                                                        NULL);
 316 #endif
 317
 318     encode_as_rep_as_tgs_rep = krb5_config_get_bool(context, cf, "kdc",
 319                                                     "encode_as_rep_as_tgs_rep",
 320                                                     NULL);
 321
 322     kdc_warn_pwexpire = krb5_config_get_time (context, cf,
 323                                               "kdc",
 324                                               "kdc_warn_pwexpire",
 325                                               NULL);
 326     kdc_openlog(cf);
 327     if(cf)
 328         krb5_config_file_free (context, cf);
 329     if(max_request == 0)
 330         max_request = 64 * 1024;
 331     if(require_preauth == -1)
 332         require_preauth = 1;
 333     if (port_str == NULL)
 334         port_str = "+";
 335 #ifdef KRB4
 336     if(v4_realm == NULL){
 337         v4_realm = malloc(40); /* REALM_SZ */
 338         krb_get_lrealm(v4_realm, 1);
 339     }
 340 #endif
 341 }