OpenBSD-4.6/kerberosV/src/kdc/config.c
/*
* Copyright (c) 1997-2004 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "kdc_locl.h"
#include <getarg.h>
#include <parse_bytes.h>
RCSID("$KTH: config.c,v 1.59 2005/05/23 17:34:12 lha Exp $");
static const char *config_file; /* location of kdc config file */
int require_preauth = -1; /* 1 == require preauth for all principals */
size_t max_request; /* maximal size of a request */
static char *max_request_str; /* `max_request' as a string */
time_t kdc_warn_pwexpire; /* time before expiration to print a warning */
struct dbinfo *databases;
HDB **db;
int num_db;
const char *port_str;
int detach_from_console = -1;
#define DETACH_IS_DEFAULT FALSE
int enable_http = -1;
krb5_boolean encode_as_rep_as_tgs_rep; /* bug compatibility */
krb5_boolean check_ticket_addresses;
krb5_boolean allow_null_ticket_addresses;
krb5_boolean allow_anonymous;
int trpolicy;
static const char *trpolicy_str;
static struct getarg_strings addresses_str; /* addresses to listen on */
krb5_addresses explicit_addresses;
static int disable_des = -1;
char *v4_realm;
int enable_v4 = -1;
int enable_kaserver = -1;
int enable_524 = -1;
int enable_v4_cross_realm = -1;
static int builtin_hdb_flag;
static int help_flag;
static int version_flag;
static struct getargs args[] = {
{
"config-file", 'c', arg_string, &config_file,
"location of config file", "file"
},
{
"require-preauth", 'p', arg_negative_flag, &require_preauth,
"don't require pa-data in as-reqs"
},
{
"max-request", 0, arg_string, &max_request,
"max size for a kdc-request", "size"
},
#if 0
{
"database", 'd', arg_string, &databases,
"location of database", "database"
},
#endif
{ "enable-http", 'H', arg_flag, &enable_http, "turn on HTTP support" },
{ "524", 0, arg_negative_flag, &enable_524,
"don't respond to 524 requests"
},
{
"kaserver", 'K', arg_flag, &enable_kaserver,
"enable kaserver support"
},
{ "kerberos4", 0, arg_flag, &enable_v4,
"respond to kerberos 4 requests"
},
{
"v4-realm", 'r', arg_string, &v4_realm,
"realm to serve v4-requests for"
},
{ "kerberos4-cross-realm", 0, arg_flag,
&enable_v4_cross_realm,
"respond to kerberos 4 requests from foreign realms"
},
{ "ports", 'P', arg_string, &port_str,
"ports to listen to", "portspec"
},
#if DETACH_IS_DEFAULT
{
"detach", 'D', arg_negative_flag, &detach_from_console,
"don't detach from console"
},
#else
{
"detach", 0 , arg_flag, &detach_from_console,
"detach from console"
},
#endif
{ "addresses", 0, arg_strings, &addresses_str,
"addresses to listen on", "list of addresses" },
{ "disable-des", 0, arg_flag, &disable_des,
"disable DES" },
{ "builtin-hdb", 0, arg_flag, &builtin_hdb_flag,
"list builtin hdb backends"},
{ "help", 'h', arg_flag, &help_flag },
{ "version", 'v', arg_flag, &version_flag }
};
static int num_args = sizeof(args) / sizeof(args[0]);
static void
usage(int ret)
{
arg_printusage (args, num_args, NULL, "");
exit (ret);
}
static void
get_dbinfo(void)
{
const krb5_config_binding *top_binding = NULL;
const krb5_config_binding *db_binding;
const krb5_config_binding *default_binding = NULL;
struct dbinfo *di, **dt;
const char *default_dbname = HDB_DEFAULT_DB;
const char *default_mkey = HDB_DB_DIR "/m-key";
const char *p;
databases = NULL;
dt = &databases;
while((db_binding = (const krb5_config_binding *)
krb5_config_get_next(context, NULL, &top_binding,
krb5_config_list,
"kdc",
"database",
NULL))) {
p = krb5_config_get_string(context, db_binding, "realm", NULL);
if(p == NULL) {
if(default_binding) {
krb5_warnx(context, "WARNING: more than one realm-less "
"database specification");
krb5_warnx(context, "WARNING: using the first encountered");
} else
default_binding = db_binding;
continue;
}
di = calloc(1, sizeof(*di));
di->realm = strdup(p);
p = krb5_config_get_string(context, db_binding, "dbname", NULL);
if(p)
di->dbname = strdup(p);
p = krb5_config_get_string(context, db_binding, "mkey_file", NULL);
if(p)
di->mkey_file = strdup(p);
*dt = di;
dt = &di->next;
}
if(default_binding) {
di = calloc(1, sizeof(*di));
p = krb5_config_get_string(context, default_binding, "dbname", NULL);
if(p) {
di->dbname = strdup(p);
default_dbname = p;
}
p = krb5_config_get_string(context, default_binding, "mkey_file", NULL);
if(p) {
di->mkey_file = strdup(p);
default_mkey = p;
}
*dt = di;
dt = &di->next;
} else if(databases == NULL) {
/* if there are none specified, use some default */
di = calloc(1, sizeof(*di));
di->dbname = strdup(default_dbname);
di->mkey_file = strdup(default_mkey);
*dt = di;
dt = &di->next;
}
for(di = databases; di; di = di->next) {
if(di->dbname == NULL)
di->dbname = strdup(default_dbname);
if(di->mkey_file == NULL) {
p = strrchr(di->dbname, '.');
if(p == NULL || strchr(p, '/') != NULL)
/* final pathname component does not contain a . */
asprintf(&di->mkey_file, "%s.mkey", di->dbname);
else
/* the filename is something.else, replace .else with
.mkey */
asprintf(&di->mkey_file, "%.*s.mkey",
(int)(p - di->dbname), di->dbname);
}
}
}
static void
add_one_address (const char *str, int first)
{
krb5_error_code ret;
krb5_addresses tmp;
ret = krb5_parse_address (context, str, &tmp);
if (ret)
krb5_err (context, 1, ret, "parse_address `%s'", str);
if (first)
krb5_copy_addresses(context, &tmp, &explicit_addresses);
else
krb5_append_addresses(context, &explicit_addresses, &tmp);
krb5_free_addresses (context, &tmp);
}
void
configure(int argc, char **argv)
{
krb5_error_code ret;
int optind = 0;
const char *p;
while(getarg(args, num_args, argc, argv, &optind))
warnx("error at argument `%s'", argv[optind]);
if(help_flag)
usage (0);
if (version_flag) {
print_version(NULL);
exit(0);
}
if (builtin_hdb_flag) {
char *list;
ret = hdb_list_builtin(context, &list);
if (ret)
krb5_err(context, 1, ret, "listing builtin hdb backends");
printf("builtin hdb backends: %s\n", list);
free(list);
exit(0);
}
argc -= optind;
argv += optind;
if (argc != 0)
usage(1);
{
char **files;
if(config_file == NULL)
config_file = _PATH_KDC_CONF;
ret = krb5_prepend_config_files_default(config_file, &files);
if (ret)
krb5_err(context, 1, ret, "getting configuration files");
ret = krb5_set_config_files(context, files);
krb5_free_config_files(files);
if(ret)
krb5_err(context, 1, ret, "reading configuration files");
}
get_dbinfo();
if(max_request_str)
max_request = parse_bytes(max_request_str, NULL);
if(max_request == 0){
p = krb5_config_get_string (context,
NULL,
"kdc",
"max-request",
NULL);
if(p)
max_request = parse_bytes(p, NULL);
}
if(require_preauth == -1)
require_preauth = krb5_config_get_bool(context, NULL, "kdc",
"require-preauth", NULL);
if(port_str == NULL){
p = krb5_config_get_string(context, NULL, "kdc", "ports", NULL);
if (p != NULL)
port_str = strdup(p);
}
explicit_addresses.len = 0;
if (addresses_str.num_strings) {
int i;
for (i = 0; i < addresses_str.num_strings; ++i)
add_one_address (addresses_str.strings[i], i == 0);
free_getarg_strings (&addresses_str);
} else {
char **foo = krb5_config_get_strings (context, NULL,
"kdc", "addresses", NULL);
if (foo != NULL) {
add_one_address (*foo++, TRUE);
while (*foo)
add_one_address (*foo++, FALSE);
}
}
if(enable_v4 == -1)
enable_v4 = krb5_config_get_bool_default(context, NULL, FALSE, "kdc",
"enable-kerberos4", NULL);
if(enable_v4_cross_realm == -1)
enable_v4_cross_realm =
krb5_config_get_bool_default(context, NULL,
FALSE, "kdc",
"enable-kerberos4-cross-realm",
NULL);
if(enable_524 == -1)
enable_524 = krb5_config_get_bool_default(context, NULL, enable_v4,
"kdc", "enable-524", NULL);
if(enable_http == -1)
enable_http = krb5_config_get_bool(context, NULL, "kdc",
"enable-http", NULL);
check_ticket_addresses =
krb5_config_get_bool_default(context, NULL, TRUE, "kdc",
"check-ticket-addresses", NULL);
allow_null_ticket_addresses =
krb5_config_get_bool_default(context, NULL, TRUE, "kdc",
"allow-null-ticket-addresses", NULL);
allow_anonymous =
krb5_config_get_bool(context, NULL, "kdc",
"allow-anonymous", NULL);
trpolicy_str =
krb5_config_get_string_default(context, NULL, "always-check", "kdc",
"transited-policy", NULL);
if(strcasecmp(trpolicy_str, "always-check") == 0)
trpolicy = TRPOLICY_ALWAYS_CHECK;
else if(strcasecmp(trpolicy_str, "allow-per-principal") == 0)
trpolicy = TRPOLICY_ALLOW_PER_PRINCIPAL;
else if(strcasecmp(trpolicy_str, "always-honour-request") == 0)
trpolicy = TRPOLICY_ALWAYS_HONOUR_REQUEST;
else {
kdc_log(0, "unknown transited-policy: %s, reverting to always-check",
trpolicy_str);
trpolicy = TRPOLICY_ALWAYS_CHECK;
}
if (krb5_config_get_string(context, NULL, "kdc",
"enforce-transited-policy", NULL))
krb5_errx(context, 1, "enforce-transited-policy deprecated, "
"use [kdc]transited-policy instead");
if(v4_realm == NULL){
p = krb5_config_get_string (context, NULL,
"kdc",
"v4-realm",
NULL);
if(p != NULL) {
v4_realm = strdup(p);
if (v4_realm == NULL)
krb5_errx(context, 1, "out of memory");
}
}
if (enable_kaserver == -1)
enable_kaserver = krb5_config_get_bool_default(context, NULL, FALSE,
"kdc",
"enable-kaserver",
NULL);
encode_as_rep_as_tgs_rep = krb5_config_get_bool(context, NULL, "kdc",
"encode_as_rep_as_tgs_rep",
NULL);
kdc_warn_pwexpire = krb5_config_get_time (context, NULL,
"kdc",
"kdc_warn_pwexpire",
NULL);
if(detach_from_console == -1)
detach_from_console = krb5_config_get_bool_default(context, NULL,
DETACH_IS_DEFAULT,
"kdc",
"detach", NULL);
kdc_openlog();
if(max_request == 0)
max_request = 64 * 1024;
if(require_preauth == -1)
require_preauth = 1;
if (port_str == NULL)
port_str = "+";
#ifdef PKINIT
enable_pkinit = krb5_config_get_bool_default(context, NULL, FALSE,
"kdc",
"enable-pkinit",
NULL);
if (enable_pkinit) {
const char *user_id, *x509_anchors;
user_id = krb5_config_get_string(context, NULL,
"kdc",
"pki-identity",
NULL);
if (user_id == NULL)
krb5_errx(context, 1, "pkinit enabled but no identity");
x509_anchors = krb5_config_get_string(context, NULL,
"kdc",
"pki-anchors",
NULL);
if (x509_anchors == NULL)
krb5_errx(context, 1, "pkinit enabled but no X509 anchors");
pk_initialize(user_id, x509_anchors);
enable_pkinit_princ_in_cert =
krb5_config_get_bool_default(context,
NULL, TRUE,
"kdc",
"pkinit-principal-in-certificate",
NULL);
}
#endif
if(v4_realm == NULL && (enable_kaserver || enable_v4)){
#ifdef KRB4
v4_realm = malloc(40); /* REALM_SZ */
if (v4_realm == NULL)
krb5_errx(context, 1, "out of memory");
krb_get_lrealm(v4_realm, 1);
#else
krb5_errx(context, 1, "No Kerberos 4 realm configured");
#endif
}
if(disable_des == -1)
disable_des = krb5_config_get_bool_default(context, NULL,
0,
"kdc",
"disable-des", NULL);
if(disable_des) {
krb5_enctype_disable(context, ETYPE_DES_CBC_CRC);
krb5_enctype_disable(context, ETYPE_DES_CBC_MD4);
krb5_enctype_disable(context, ETYPE_DES_CBC_MD5);
krb5_enctype_disable(context, ETYPE_DES_CBC_NONE);
krb5_enctype_disable(context, ETYPE_DES_CFB64_NONE);
krb5_enctype_disable(context, ETYPE_DES_PCBC_NONE);
kdc_log(0, "DES was disabled, turned off Kerberos V4, 524 "
"and kaserver");
enable_v4 = 0;
enable_524 = 0;
enable_kaserver = 0;
}
}