crypto/dist/heimdal/kdc/config.c

   1 /*
   2  * Copyright (c) 1997-2007 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  *
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * 3. Neither the name of the Institute nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include "kdc_locl.h"
  36 #include <getarg.h>
  37 #include <parse_bytes.h>
  38
  39 __RCSID("$Heimdal: config.c 22248 2007-12-08 23:52:12Z lha $"
  40         "$NetBSD$");
  41
  42 struct dbinfo {
  43     char *realm;
  44     char *dbname;
  45     char *mkey_file;
  46     struct dbinfo *next;
  47 };
  48
  49 static char *config_file;       /* location of kdc config file */
  50
  51 static int require_preauth = -1; /* 1 == require preauth for all principals */
  52 static char *max_request_str;   /* `max_request' as a string */
  53
  54 static int disable_des = -1;
  55 static int enable_v4 = -1;
  56 static int enable_kaserver = -1;
  57 static int enable_524 = -1;
  58 static int enable_v4_cross_realm = -1;
  59
  60 static int builtin_hdb_flag;
  61 static int help_flag;
  62 static int version_flag;
  63
  64 static struct getarg_strings addresses_str;     /* addresses to listen on */
  65
  66 static char *v4_realm;
  67
  68 static struct getargs args[] = {
  69     {
  70         "config-file",  'c',    arg_string,     &config_file,
  71         "location of config file",      "file"
  72     },
  73     {
  74         "require-preauth",      'p',    arg_negative_flag, &require_preauth,
  75         "don't require pa-data in as-reqs"
  76     },
  77     {
  78         "max-request",  0,      arg_string, &max_request,
  79         "max size for a kdc-request", "size"
  80     },
  81     { "enable-http", 'H', arg_flag, &enable_http, "turn on HTTP support" },
  82     {   "524",          0,      arg_negative_flag, &enable_524,
  83         "don't respond to 524 requests"
  84     },
  85     {
  86         "kaserver", 'K', arg_flag,   &enable_kaserver,
  87         "enable kaserver support"
  88     },
  89     {   "kerberos4",    0,      arg_flag, &enable_v4,
  90         "respond to kerberos 4 requests"
  91     },
  92     {
  93         "v4-realm",     'r',    arg_string, &v4_realm,
  94         "realm to serve v4-requests for"
  95     },
  96     {   "kerberos4-cross-realm",        0,      arg_flag,
  97         &enable_v4_cross_realm,
  98         "respond to kerberos 4 requests from foreign realms"
  99     },
 100     {   "ports",        'P',    arg_string, &port_str,
 101         "ports to listen to", "portspec"
 102     },
 103 #if DETACH_IS_DEFAULT
 104     {
 105         "detach",       'D',      arg_negative_flag, &detach_from_console,
 106         "don't detach from console"
 107     },
 108 #else
 109     {
 110         "detach",       0 ,      arg_flag, &detach_from_console,
 111         "detach from console"
 112     },
 113 #endif
 114     {   "addresses",    0,      arg_strings, &addresses_str,
 115         "addresses to listen on", "list of addresses" },
 116     {   "disable-des",  0,      arg_flag, &disable_des,
 117         "disable DES" },
 118     {   "builtin-hdb",  0,      arg_flag,   &builtin_hdb_flag,
 119         "list builtin hdb backends"},
 120     {   "help",         'h',    arg_flag,   &help_flag },
 121     {   "version",      'v',    arg_flag,   &version_flag }
 122 };
 123
 124 static int num_args = sizeof(args) / sizeof(args[0]);
 125
 126 static void
 127 usage(int ret)
 128 {
 129     arg_printusage (args, num_args, NULL, "");
 130     exit (ret);
 131 }
 132
 133 static void
 134 add_one_address (krb5_context context, const char *str, int first)
 135 {
 136     krb5_error_code ret;
 137     krb5_addresses tmp;
 138
 139     ret = krb5_parse_address (context, str, &tmp);
 140     if (ret)
 141         krb5_err (context, 1, ret, "parse_address `%s'", str);
 142     if (first)
 143         krb5_copy_addresses(context, &tmp, &explicit_addresses);
 144     else
 145         krb5_append_addresses(context, &explicit_addresses, &tmp);
 146     krb5_free_addresses (context, &tmp);
 147 }
 148
 149 krb5_kdc_configuration *
 150 configure(krb5_context context, int argc, char **argv)
 151 {
 152     krb5_kdc_configuration *config;
 153     krb5_error_code ret;
 154     int optidx = 0;
 155     const char *p;
 156
 157     while(getarg(args, num_args, argc, argv, &optidx))
 158         warnx("error at argument `%s'", argv[optidx]);
 159
 160     if(help_flag)
 161         usage (0);
 162
 163     if (version_flag) {
 164         print_version(NULL);
 165         exit(0);
 166     }
 167
 168     if (builtin_hdb_flag) {
 169         char *list;
 170         ret = hdb_list_builtin(context, &list);
 171         if (ret)
 172             krb5_err(context, 1, ret, "listing builtin hdb backends");
 173         printf("builtin hdb backends: %s\n", list);
 174         free(list);
 175         exit(0);
 176     }
 177
 178     argc -= optidx;
 179     argv += optidx;
 180
 181     if (argc != 0)
 182         usage(1);
 183
 184     {
 185         char **files;
 186
 187         if (config_file == NULL) {
 188             asprintf(&config_file, "%s/kdc.conf", hdb_db_dir(context));
 189             if (config_file == NULL)
 190                 errx(1, "out of memory");
 191         }
 192
 193         ret = krb5_prepend_config_files_default(config_file, &files);
 194         if (ret)
 195             krb5_err(context, 1, ret, "getting configuration files");
 196
 197         ret = krb5_set_config_files(context, files);
 198         krb5_free_config_files(files);
 199         if(ret)
 200             krb5_err(context, 1, ret, "reading configuration files");
 201     }
 202
 203     ret = krb5_kdc_get_config(context, &config);
 204     if (ret)
 205         krb5_err(context, 1, ret, "krb5_kdc_default_config");
 206
 207     kdc_openlog(context, config);
 208
 209     ret = krb5_kdc_set_dbinfo(context, config);
 210     if (ret)
 211         krb5_err(context, 1, ret, "krb5_kdc_set_dbinfo");
 212
 213     if(max_request_str)
 214         max_request = parse_bytes(max_request_str, NULL);
 215
 216     if(max_request == 0){
 217         p = krb5_config_get_string (context,
 218                                     NULL,
 219                                     "kdc",
 220                                     "max-request",
 221                                     NULL);
 222         if(p)
 223             max_request = parse_bytes(p, NULL);
 224     }
 225
 226     if(require_preauth != -1)
 227         config->require_preauth = require_preauth;
 228
 229     if(port_str == NULL){
 230         p = krb5_config_get_string(context, NULL, "kdc", "ports", NULL);
 231         if (p != NULL)
 232             port_str = strdup(p);
 233     }
 234
 235     explicit_addresses.len = 0;
 236
 237     if (addresses_str.num_strings) {
 238         int i;
 239
 240         for (i = 0; i < addresses_str.num_strings; ++i)
 241             add_one_address (context, addresses_str.strings[i], i == 0);
 242         free_getarg_strings (&addresses_str);
 243     } else {
 244         char **foo = krb5_config_get_strings (context, NULL,
 245                                               "kdc", "addresses", NULL);
 246
 247         if (foo != NULL) {
 248             add_one_address (context, *foo++, TRUE);
 249             while (*foo)
 250                 add_one_address (context, *foo++, FALSE);
 251         }
 252     }
 253
 254     if(enable_v4 != -1)
 255         config->enable_v4 = enable_v4;
 256
 257     if(enable_v4_cross_realm != -1)
 258         config->enable_v4_cross_realm = enable_v4_cross_realm;
 259
 260     if(enable_524 != -1)
 261         config->enable_524 = enable_524;
 262
 263     if(enable_http == -1)
 264         enable_http = krb5_config_get_bool(context, NULL, "kdc",
 265                                            "enable-http", NULL);
 266
 267     if(request_log == NULL)
 268         request_log = krb5_config_get_string(context, NULL,
 269                                              "kdc",
 270                                              "kdc-request-log",
 271                                              NULL);
 272
 273     if (krb5_config_get_string(context, NULL, "kdc",
 274                                "enforce-transited-policy", NULL))
 275         krb5_errx(context, 1, "enforce-transited-policy deprecated, "
 276                   "use [kdc]transited-policy instead");
 277
 278     if (enable_kaserver != -1)
 279         config->enable_kaserver = enable_kaserver;
 280
 281     if(detach_from_console == -1)
 282         detach_from_console = krb5_config_get_bool_default(context, NULL,
 283                                                            DETACH_IS_DEFAULT,
 284                                                            "kdc",
 285                                                            "detach", NULL);
 286
 287     if(max_request == 0)
 288         max_request = 64 * 1024;
 289
 290     if (port_str == NULL)
 291         port_str = "+";
 292
 293     if (v4_realm)
 294         config->v4_realm = v4_realm;
 295
 296     if(config->v4_realm == NULL && (config->enable_kaserver || config->enable_v4))
 297         krb5_errx(context, 1, "Kerberos 4 enabled but no realm configured");
 298
 299     if(disable_des == -1)
 300         disable_des = krb5_config_get_bool_default(context, NULL,
 301                                                    FALSE,
 302                                                    "kdc",
 303                                                    "disable-des", NULL);
 304     if(disable_des) {
 305         krb5_enctype_disable(context, ETYPE_DES_CBC_CRC);
 306         krb5_enctype_disable(context, ETYPE_DES_CBC_MD4);
 307         krb5_enctype_disable(context, ETYPE_DES_CBC_MD5);
 308         krb5_enctype_disable(context, ETYPE_DES_CBC_NONE);
 309         krb5_enctype_disable(context, ETYPE_DES_CFB64_NONE);
 310         krb5_enctype_disable(context, ETYPE_DES_PCBC_NONE);
 311
 312         kdc_log(context, config,
 313                 0, "DES was disabled, turned off Kerberos V4, 524 "
 314                 "and kaserver");
 315         config->enable_v4 = 0;
 316         config->enable_524 = 0;
 317         config->enable_kaserver = 0;
 318     }
 319
 320     krb5_kdc_windc_init(context);
 321
 322     return config;
 323 }