freebsd-dev/crypto/heimdal/lib/hdb/common.c
2000-01-09 20:58:00 +00:00

146 lines
4.0 KiB
C

/*
* Copyright (c) 1997-1999 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 "hdb_locl.h"
RCSID("$Id: common.c,v 1.6 1999/12/02 17:05:04 joda Exp $");
int
hdb_principal2key(krb5_context context, krb5_principal p, krb5_data *key)
{
Principal new;
size_t len;
unsigned char *buf;
int ret;
ret = copy_Principal(p, &new);
if(ret)
goto out;
new.name.name_type = 0;
len = length_Principal(&new);
buf = malloc(len);
if(buf == NULL){
ret = ENOMEM;
goto out;
}
ret = encode_Principal(buf + len - 1, len, &new, &len);
if(ret){
free(buf);
goto out;
}
key->data = buf;
key->length = len;
out:
free_Principal(&new);
return ret;
}
int
hdb_key2principal(krb5_context context, krb5_data *key, krb5_principal p)
{
return decode_Principal(key->data, key->length, p, NULL);
}
int
hdb_entry2value(krb5_context context, hdb_entry *ent, krb5_data *value)
{
unsigned char *buf;
size_t len;
int ret;
len = length_hdb_entry(ent);
buf = malloc(len);
if(buf == NULL)
return ENOMEM;
ret = encode_hdb_entry(buf + len - 1, len, ent, &len);
if(ret){
free(buf);
return ret;
}
value->data = buf;
value->length = len;
return 0;
}
int
hdb_value2entry(krb5_context context, krb5_data *value, hdb_entry *ent)
{
return decode_hdb_entry(value->data, value->length, ent, NULL);
}
krb5_error_code
_hdb_fetch(krb5_context context, HDB *db, unsigned flags, hdb_entry *entry)
{
krb5_data key, value;
int code;
hdb_principal2key(context, entry->principal, &key);
code = db->_get(context, db, key, &value);
krb5_data_free(&key);
if(code)
return code;
hdb_value2entry(context, &value, entry);
if (db->master_key_set && (flags & HDB_F_DECRYPT))
hdb_unseal_keys (db, entry);
krb5_data_free(&value);
return 0;
}
krb5_error_code
_hdb_store(krb5_context context, HDB *db, unsigned flags, hdb_entry *entry)
{
krb5_data key, value;
int code;
hdb_principal2key(context, entry->principal, &key);
hdb_seal_keys(db, entry);
hdb_entry2value(context, entry, &value);
code = db->_put(context, db, flags & HDB_F_REPLACE, key, value);
krb5_data_free(&value);
krb5_data_free(&key);
return code;
}
krb5_error_code
_hdb_remove(krb5_context context, HDB *db, hdb_entry *entry)
{
krb5_data key;
int code;
hdb_principal2key(context, entry->principal, &key);
code = db->_del(context, db, key);
krb5_data_free(&key);
return code;
}