438 lines
12 KiB
C
438 lines
12 KiB
C
/*
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* Copyright (c) 1997-2003 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "kdc_locl.h"
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#include <getarg.h>
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#include <parse_bytes.h>
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RCSID("$Id: config.c,v 1.46.2.2 2003/10/27 11:06:52 joda Exp $");
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static const char *config_file; /* location of kdc config file */
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int require_preauth = -1; /* 1 == require preauth for all principals */
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size_t max_request; /* maximal size of a request */
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static char *max_request_str; /* `max_request' as a string */
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time_t kdc_warn_pwexpire; /* time before expiration to print a warning */
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struct dbinfo *databases;
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HDB **db;
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int num_db;
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const char *port_str;
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#ifdef HAVE_DAEMON
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int detach_from_console = -1;
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#define DETACH_IS_DEFAULT FALSE
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#endif
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int enable_http = -1;
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krb5_boolean encode_as_rep_as_tgs_rep; /* bug compatibility */
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krb5_boolean check_ticket_addresses;
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krb5_boolean allow_null_ticket_addresses;
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krb5_boolean allow_anonymous;
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int trpolicy;
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static const char *trpolicy_str;
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static struct getarg_strings addresses_str; /* addresses to listen on */
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krb5_addresses explicit_addresses;
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#ifdef KRB4
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char *v4_realm;
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int enable_v4 = -1;
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int enable_kaserver = -1;
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#endif
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int enable_524 = -1;
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int enable_v4_cross_realm = -1;
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static int help_flag;
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static int version_flag;
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static struct getargs args[] = {
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{
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"config-file", 'c', arg_string, &config_file,
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"location of config file", "file"
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},
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{
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"require-preauth", 'p', arg_negative_flag, &require_preauth,
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"don't require pa-data in as-reqs"
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},
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{
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"max-request", 0, arg_string, &max_request,
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"max size for a kdc-request", "size"
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},
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#if 0
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{
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"database", 'd', arg_string, &databases,
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"location of database", "database"
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},
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#endif
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{ "enable-http", 'H', arg_flag, &enable_http, "turn on HTTP support" },
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{ "524", 0, arg_negative_flag, &enable_524,
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"don't respond to 524 requests"
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},
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#ifdef KRB4
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{
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"kaserver", 'K', arg_flag, &enable_kaserver,
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"enable kaserver support"
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},
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{ "kerberos4", 0, arg_flag, &enable_v4,
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"respond to kerberos 4 requests"
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},
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{
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"v4-realm", 'r', arg_string, &v4_realm,
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"realm to serve v4-requests for"
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},
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#endif
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{ "kerberos4-cross-realm", 0, arg_flag,
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&enable_v4_cross_realm,
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"respond to kerberos 4 requests from foreign realms"
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},
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{ "ports", 'P', arg_string, &port_str,
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"ports to listen to", "portspec"
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},
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#ifdef HAVE_DAEMON
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#if DETACH_IS_DEFAULT
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{
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"detach", 'D', arg_negative_flag, &detach_from_console,
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"don't detach from console"
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},
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#else
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{
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"detach", 0 , arg_flag, &detach_from_console,
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"detach from console"
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},
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#endif
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#endif
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{ "addresses", 0, arg_strings, &addresses_str,
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"addresses to listen on", "list of addresses" },
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{ "help", 'h', arg_flag, &help_flag },
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{ "version", 'v', arg_flag, &version_flag }
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};
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static int num_args = sizeof(args) / sizeof(args[0]);
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static void
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usage(int ret)
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{
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arg_printusage (args, num_args, NULL, "");
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exit (ret);
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}
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static void
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get_dbinfo(void)
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{
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const krb5_config_binding *top_binding = NULL;
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const krb5_config_binding *db_binding;
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const krb5_config_binding *default_binding = NULL;
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struct dbinfo *di, **dt;
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const char *default_dbname = HDB_DEFAULT_DB;
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const char *default_mkey = HDB_DB_DIR "/m-key";
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const char *p;
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databases = NULL;
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dt = &databases;
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while((db_binding = (const krb5_config_binding *)
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krb5_config_get_next(context, NULL, &top_binding,
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krb5_config_list,
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"kdc",
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"database",
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NULL))) {
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p = krb5_config_get_string(context, db_binding, "realm", NULL);
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if(p == NULL) {
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if(default_binding) {
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krb5_warnx(context, "WARNING: more than one realm-less "
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"database specification");
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krb5_warnx(context, "WARNING: using the first encountered");
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} else
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default_binding = db_binding;
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continue;
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}
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di = calloc(1, sizeof(*di));
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di->realm = strdup(p);
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p = krb5_config_get_string(context, db_binding, "dbname", NULL);
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if(p)
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di->dbname = strdup(p);
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p = krb5_config_get_string(context, db_binding, "mkey_file", NULL);
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if(p)
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di->mkey_file = strdup(p);
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*dt = di;
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dt = &di->next;
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}
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if(default_binding) {
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di = calloc(1, sizeof(*di));
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p = krb5_config_get_string(context, default_binding, "dbname", NULL);
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if(p) {
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di->dbname = strdup(p);
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default_dbname = p;
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}
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p = krb5_config_get_string(context, default_binding, "mkey_file", NULL);
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if(p) {
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di->mkey_file = strdup(p);
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default_mkey = p;
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}
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*dt = di;
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dt = &di->next;
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} else if(databases == NULL) {
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/* if there are none specified, use some default */
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di = calloc(1, sizeof(*di));
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di->dbname = strdup(default_dbname);
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di->mkey_file = strdup(default_mkey);
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*dt = di;
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dt = &di->next;
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}
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for(di = databases; di; di = di->next) {
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if(di->dbname == NULL)
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di->dbname = strdup(default_dbname);
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if(di->mkey_file == NULL) {
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p = strrchr(di->dbname, '.');
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if(p == NULL || strchr(p, '/') != NULL)
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/* final pathname component does not contain a . */
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asprintf(&di->mkey_file, "%s.mkey", di->dbname);
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else
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/* the filename is something.else, replace .else with
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.mkey */
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asprintf(&di->mkey_file, "%.*s.mkey",
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(int)(p - di->dbname), di->dbname);
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}
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}
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}
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static void
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add_one_address (const char *str, int first)
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{
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krb5_error_code ret;
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krb5_addresses tmp;
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ret = krb5_parse_address (context, str, &tmp);
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if (ret)
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krb5_err (context, 1, ret, "parse_address `%s'", str);
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if (first)
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krb5_copy_addresses(context, &tmp, &explicit_addresses);
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else
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krb5_append_addresses(context, &explicit_addresses, &tmp);
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krb5_free_addresses (context, &tmp);
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}
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void
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configure(int argc, char **argv)
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{
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int optind = 0;
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int e;
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const char *p;
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while((e = getarg(args, num_args, argc, argv, &optind)))
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warnx("error at argument `%s'", argv[optind]);
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if(help_flag)
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usage (0);
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if (version_flag) {
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print_version(NULL);
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exit(0);
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}
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argc -= optind;
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argv += optind;
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if (argc != 0)
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usage(1);
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{
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krb5_error_code ret;
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char **files;
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char *tmp;
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if(config_file == NULL)
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config_file = _PATH_KDC_CONF;
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asprintf(&tmp, "%s:%s", config_file, krb5_config_file);
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if(tmp == NULL)
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krb5_errx(context, 1, "out of memory");
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krb5_config_file = tmp;
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ret = krb5_get_default_config_files(&files);
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if(ret)
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krb5_err(context, 1, ret, "reading configuration files");
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ret = krb5_set_config_files(context, files);
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krb5_free_config_files(files);
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if(ret)
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krb5_err(context, 1, ret, "reading configuration files");
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}
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get_dbinfo();
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if(max_request_str)
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max_request = parse_bytes(max_request_str, NULL);
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if(max_request == 0){
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p = krb5_config_get_string (context,
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NULL,
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"kdc",
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"max-request",
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NULL);
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if(p)
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max_request = parse_bytes(p, NULL);
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}
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if(require_preauth == -1)
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require_preauth = krb5_config_get_bool(context, NULL, "kdc",
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"require-preauth", NULL);
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if(port_str == NULL){
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p = krb5_config_get_string(context, NULL, "kdc", "ports", NULL);
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if (p != NULL)
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port_str = strdup(p);
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}
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explicit_addresses.len = 0;
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if (addresses_str.num_strings) {
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int i;
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for (i = 0; i < addresses_str.num_strings; ++i)
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add_one_address (addresses_str.strings[i], i == 0);
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free_getarg_strings (&addresses_str);
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} else {
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char **foo = krb5_config_get_strings (context, NULL,
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"kdc", "addresses", NULL);
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if (foo != NULL) {
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add_one_address (*foo++, TRUE);
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while (*foo)
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add_one_address (*foo++, FALSE);
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}
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}
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#ifdef KRB4
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if(enable_v4 == -1)
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enable_v4 = krb5_config_get_bool_default(context, NULL, FALSE, "kdc",
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"enable-kerberos4", NULL);
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#else
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#define enable_v4 0
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#endif
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if(enable_v4_cross_realm == -1)
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enable_v4_cross_realm =
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krb5_config_get_bool_default(context, NULL,
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FALSE, "kdc",
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"enable-kerberos4-cross-realm",
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NULL);
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if(enable_524 == -1)
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enable_524 = krb5_config_get_bool_default(context, NULL, enable_v4,
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"kdc", "enable-524", NULL);
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if(enable_http == -1)
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enable_http = krb5_config_get_bool(context, NULL, "kdc",
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"enable-http", NULL);
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check_ticket_addresses =
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krb5_config_get_bool_default(context, NULL, TRUE, "kdc",
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"check-ticket-addresses", NULL);
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allow_null_ticket_addresses =
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krb5_config_get_bool_default(context, NULL, TRUE, "kdc",
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"allow-null-ticket-addresses", NULL);
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allow_anonymous =
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krb5_config_get_bool(context, NULL, "kdc",
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"allow-anonymous", NULL);
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trpolicy_str =
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krb5_config_get_string_default(context, NULL, "always-check", "kdc",
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"transited-policy", NULL);
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if(strcasecmp(trpolicy_str, "always-check") == 0)
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trpolicy = TRPOLICY_ALWAYS_CHECK;
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else if(strcasecmp(trpolicy_str, "allow-per-principal") == 0)
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trpolicy = TRPOLICY_ALLOW_PER_PRINCIPAL;
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else if(strcasecmp(trpolicy_str, "always-honour-request") == 0)
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trpolicy = TRPOLICY_ALWAYS_HONOUR_REQUEST;
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else {
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kdc_log(0, "unknown transited-policy: %s, reverting to always-check",
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trpolicy_str);
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trpolicy = TRPOLICY_ALWAYS_CHECK;
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}
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krb5_config_get_bool_default(context, NULL, TRUE, "kdc",
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"enforce-transited-policy", NULL);
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#ifdef KRB4
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if(v4_realm == NULL){
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p = krb5_config_get_string (context, NULL,
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"kdc",
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"v4-realm",
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NULL);
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if(p != NULL) {
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v4_realm = strdup(p);
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if (v4_realm == NULL)
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krb5_errx(context, 1, "out of memory");
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}
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}
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if (enable_kaserver == -1)
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enable_kaserver = krb5_config_get_bool_default(context, NULL, FALSE,
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"kdc",
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"enable-kaserver",
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NULL);
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#endif
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encode_as_rep_as_tgs_rep = krb5_config_get_bool(context, NULL, "kdc",
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"encode_as_rep_as_tgs_rep",
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NULL);
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kdc_warn_pwexpire = krb5_config_get_time (context, NULL,
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"kdc",
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"kdc_warn_pwexpire",
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NULL);
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#ifdef HAVE_DAEMON
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if(detach_from_console == -1)
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detach_from_console = krb5_config_get_bool_default(context, NULL,
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DETACH_IS_DEFAULT,
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"kdc",
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"detach", NULL);
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#endif
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kdc_openlog();
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if(max_request == 0)
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max_request = 64 * 1024;
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if(require_preauth == -1)
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require_preauth = 1;
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if (port_str == NULL)
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port_str = "+";
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#ifdef KRB4
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if(v4_realm == NULL){
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v4_realm = malloc(40); /* REALM_SZ */
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if (v4_realm == NULL)
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krb5_errx(context, 1, "out of memory");
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krb_get_lrealm(v4_realm, 1);
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}
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#endif
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}
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