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/*
* Copyright (c) 1997 - 2000 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 "krb5_locl.h"
RCSID("$Id: context.c,v 1.59 2000/12/15 17:11:51 joda Exp $");
#define INIT_FIELD(C, T, E, D, F) \
(C)->E = krb5_config_get_ ## T ## _default ((C), NULL, (D), \
"libdefaults", F, NULL)
/*
* Set the list of etypes `ret_etypes' from the configuration variable
* `name'
*/
static krb5_error_code
set_etypes (krb5_context context,
const char *name,
krb5_enctype **ret_enctypes)
{
char **etypes_str;
krb5_enctype *etypes;
etypes_str = krb5_config_get_strings(context, NULL, "libdefaults",
name, NULL);
if(etypes_str){
int i, j, k;
for(i = 0; etypes_str[i]; i++);
etypes = malloc((i+1) * sizeof(*etypes));
if (etypes == NULL) {
krb5_config_free_strings (etypes_str);
return ENOMEM;
}
for(j = 0, k = 0; j < i; j++) {
if(krb5_string_to_enctype(context, etypes_str[j], &etypes[k]) == 0)
k++;
}
etypes[k] = ETYPE_NULL;
krb5_config_free_strings(etypes_str);
*ret_enctypes = etypes;
}
return 0;
}
/*
* read variables from the configuration file and set in `context'
*/
static krb5_error_code
init_context_from_config_file(krb5_context context)
{
const char * tmp;
INIT_FIELD(context, time, max_skew, 5 * 60, "clockskew");
INIT_FIELD(context, time, kdc_timeout, 3, "kdc_timeout");
INIT_FIELD(context, int, max_retries, 3, "max_retries");
INIT_FIELD(context, string, http_proxy, NULL, "http_proxy");
set_etypes (context, "default_etypes", &context->etypes);
set_etypes (context, "default_etypes_des", &context->etypes_des);
/* default keytab name */
INIT_FIELD(context, string, default_keytab,
KEYTAB_DEFAULT, "default_keytab_name");
INIT_FIELD(context, string, time_fmt,
"%Y-%m-%dT%H:%M:%S", "time_format");
INIT_FIELD(context, string, date_fmt,
"%Y-%m-%d", "date_format");
INIT_FIELD(context, bool, log_utc,
FALSE, "log_utc");
/* init dns-proxy slime */
tmp = krb5_config_get_string(context, NULL, "libdefaults",
"dns_proxy", NULL);
if(tmp)
roken_gethostby_setup(context->http_proxy, tmp);
context->default_realms = NULL;
{
krb5_addresses addresses;
char **adr, **a;
adr = krb5_config_get_strings(context, NULL,
"libdefaults",
"extra_addresses",
NULL);
memset(&addresses, 0, sizeof(addresses));
for(a = adr; a && *a; a++) {
krb5_parse_address(context, *a, &addresses);
krb5_add_extra_addresses(context, &addresses);
krb5_free_addresses(context, &addresses);
}
krb5_config_free_strings(adr);
}
INIT_FIELD(context, bool, scan_interfaces, TRUE, "scan_interfaces");
INIT_FIELD(context, bool, srv_lookup, TRUE, "srv_lookup");
INIT_FIELD(context, bool, srv_try_txt, FALSE, "srv_try_txt");
INIT_FIELD(context, int, fcache_vno, 0, "fcache_version");
context->cc_ops = NULL;
context->num_cc_ops = 0;
krb5_cc_register(context, &krb5_fcc_ops, TRUE);
krb5_cc_register(context, &krb5_mcc_ops, TRUE);
context->num_kt_types = 0;
context->kt_types = NULL;
krb5_kt_register (context, &krb5_fkt_ops);
krb5_kt_register (context, &krb5_mkt_ops);
krb5_kt_register (context, &krb5_akf_ops);
krb5_kt_register (context, &krb4_fkt_ops);
return 0;
}
krb5_error_code
krb5_init_context(krb5_context *context)
{
krb5_context p;
const char *config_file = NULL;
krb5_config_section *tmp_cf;
krb5_error_code ret;
ALLOC(p, 1);
if(!p)
return ENOMEM;
memset(p, 0, sizeof(krb5_context_data));
/* init error tables */
krb5_init_ets(p);
if(!issuid())
config_file = getenv("KRB5_CONFIG");
if (config_file == NULL)
config_file = krb5_config_file;
ret = krb5_config_parse_file (config_file, &tmp_cf);
if (ret == 0)
p->cf = tmp_cf;
#if 0
else
krb5_warnx (p, "Unable to parse config file %s. Ignoring.",
config_file); /* XXX */
#endif
ret = init_context_from_config_file(p);
if(ret) {
krb5_free_context(p);
return ret;
}
*context = p;
return 0;
}
void
krb5_free_context(krb5_context context)
{
int i;
free(context->etypes);
free(context->etypes_des);
krb5_free_host_realm (context, context->default_realms);
krb5_config_file_free (context, context->cf);
free_error_table (context->et_list);
for(i = 0; i < context->num_cc_ops; ++i)
free(context->cc_ops[i].prefix);
free(context->cc_ops);
free(context->kt_types);
free(context);
}
/*
* set `etype' to a malloced list of the default enctypes
*/
static krb5_error_code
default_etypes(krb5_enctype **etype)
{
krb5_enctype p[] = {
ETYPE_DES3_CBC_SHA1,
ETYPE_DES3_CBC_MD5,
ETYPE_ARCFOUR_HMAC_MD5,
ETYPE_DES_CBC_MD5,
ETYPE_DES_CBC_MD4,
ETYPE_DES_CBC_CRC,
ETYPE_NULL
};
*etype = malloc(sizeof(p));
if(*etype == NULL)
return ENOMEM;
memcpy(*etype, p, sizeof(p));
return 0;
}
krb5_error_code
krb5_set_default_in_tkt_etypes(krb5_context context,
const krb5_enctype *etypes)
{
int i;
krb5_enctype *p = NULL;
if(etypes) {
i = 0;
while(etypes[i])
if(!krb5_enctype_valid(context, etypes[i++]))
return KRB5_PROG_ETYPE_NOSUPP;
++i;
ALLOC(p, i);
if(!p)
return ENOMEM;
memmove(p, etypes, i * sizeof(krb5_enctype));
}
if(context->etypes)
free(context->etypes);
context->etypes = p;
return 0;
}
krb5_error_code
krb5_get_default_in_tkt_etypes(krb5_context context,
krb5_enctype **etypes)
{
krb5_enctype *p;
int i;
if(context->etypes) {
for(i = 0; context->etypes[i]; i++);
++i;
ALLOC(p, i);
if(!p)
return ENOMEM;
memmove(p, context->etypes, i * sizeof(krb5_enctype));
} else
if(default_etypes(&p))
return ENOMEM;
*etypes = p;
return 0;
}
const char *
krb5_get_err_text(krb5_context context, krb5_error_code code)
{
const char *p = com_right(context->et_list, code);
if(p == NULL)
p = strerror(code);
return p;
}
void
krb5_init_ets(krb5_context context)
{
if(context->et_list == NULL){
initialize_krb5_error_table_r(&context->et_list);
initialize_asn1_error_table_r(&context->et_list);
initialize_heim_error_table_r(&context->et_list);
}
}
void
krb5_set_use_admin_kdc (krb5_context context, krb5_boolean flag)
{
context->use_admin_kdc = flag;
}
krb5_boolean
krb5_get_use_admin_kdc (krb5_context context)
{
return context->use_admin_kdc;
}
krb5_error_code
krb5_add_extra_addresses(krb5_context context, krb5_addresses *addresses)
{
if(context->extra_addresses)
return krb5_append_addresses(context,
context->extra_addresses, addresses);
else
return krb5_set_extra_addresses(context, addresses);
}
krb5_error_code
krb5_set_extra_addresses(krb5_context context, const krb5_addresses *addresses)
{
if(context->extra_addresses) {
krb5_free_addresses(context, context->extra_addresses);
free(context->extra_addresses);
}
if(context->extra_addresses == NULL) {
context->extra_addresses = malloc(sizeof(*context->extra_addresses));
if(context->extra_addresses == NULL)
return ENOMEM;
}
return krb5_copy_addresses(context, addresses, context->extra_addresses);
}
krb5_error_code
krb5_get_extra_addresses(krb5_context context, krb5_addresses *addresses)
{
if(context->extra_addresses == NULL) {
memset(addresses, 0, sizeof(*addresses));
return 0;
}
return copy_HostAddresses(context->extra_addresses, addresses);
}
krb5_error_code
krb5_set_fcache_version(krb5_context context, int version)
{
context->fcache_vno = version;
return 0;
}
krb5_error_code
krb5_get_fcache_version(krb5_context context, int *version)
{
*version = context->fcache_vno;
return 0;
}
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