/*
 * Copyright (c) 1997 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. All advertising materials mentioning features or use of this software 
 *    must display the following acknowledgement: 
 *      This product includes software developed by Kungliga Tekniska 
 *      Högskolan and its contributors. 
 *
 * 4. 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 "hdb_locl.h"

RCSID("$Id$");

void
hdb_principal2key(krb5_context context, krb5_principal p, krb5_data *key)
{
    krb5_storage *sp;
    krb5_principal new;

    krb5_copy_principal(context, p, &new);
    new->name.name_type = 0;
    sp = krb5_storage_emem();
    krb5_store_principal(sp, new);
    krb5_storage_to_data(sp, key);
    krb5_storage_free(sp);
    krb5_free_principal(context, new);
}

void
hdb_key2principal(krb5_context context, krb5_data *key, krb5_principal *p)
{
    krb5_storage *sp;
    sp = krb5_storage_from_mem(key->data, key->length);
    krb5_ret_principal(sp, p);
    krb5_storage_free(sp);
}

void
hdb_entry2value(krb5_context context, hdb_entry *ent, krb5_data *value)
{
    krb5_storage *sp;
    sp = krb5_storage_emem();
    krb5_store_int32(sp, ent->kvno);
    krb5_store_keyblock(sp, ent->keyblock);
    krb5_store_int32(sp, ent->max_life);
    krb5_store_int32(sp, ent->max_renew);
    krb5_store_int32(sp, ent->last_change);
    krb5_store_principal(sp, ent->changed_by);
    krb5_store_int32(sp, ent->expires);
    krb5_store_int32(sp, ent->flags.i);
    krb5_storage_to_data(sp, value);
    krb5_storage_free(sp);
}

void
hdb_value2entry(krb5_context context, krb5_data *value, hdb_entry *ent)
{
    /* XXX must check return values */
    krb5_storage *sp;
    int32_t tmp;
    sp = krb5_storage_from_mem(value->data, value->length);
    krb5_ret_int32(sp, &tmp);
    ent->kvno = tmp;
    krb5_ret_keyblock(sp, &ent->keyblock);
    krb5_ret_int32(sp, &tmp);
    ent->max_life = tmp;
    krb5_ret_int32(sp, &tmp);
    ent->max_renew = tmp;
    krb5_ret_int32(sp, &tmp);
    ent->last_change = tmp;
    krb5_ret_principal(sp, &ent->changed_by);
    krb5_ret_int32(sp, &tmp);
    ent->expires = tmp;
    krb5_ret_int32(sp, &tmp);
    ent->flags.i = tmp;
    krb5_storage_free(sp);
}



krb5_error_code
hdb_etype2key(krb5_context context, 
	      hdb_entry *e, 
	      krb5_enctype etype, 
	      krb5_keyblock **key)
{
    krb5_keytype keytype;
    krb5_error_code ret;
    ret = krb5_etype2keytype(context, etype, &keytype);
    if(ret)
	return ret;
    if(keytype == e->keyblock.keytype){
	*key = &e->keyblock;
	return 0;
    }
    return KRB5_PROG_ETYPE_NOSUPP;
}

void
hdb_free_entry(krb5_context context, hdb_entry *ent)
{
    krb5_free_principal(context, ent->principal);
    krb5_free_keyblock(context, &ent->keyblock);
    krb5_free_principal(context, ent->changed_by);
}
	       


krb5_error_code
hdb_open(krb5_context context, HDB **db, 
	 const char *filename, int flags, mode_t mode)
{
    if(filename == NULL)
	filename = HDB_DEFAULT_DB;
#ifdef HAVE_DB_H
    return hdb_db_open(context, db, filename, flags, mode);
#elif HAVE_NDBM_H
    return hdb_ndbm_open(context, db, filename, flags, mode);
#else
#error No suitable database library
#endif
}