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/*
* lib/crypto/keyblocks.c
*
* Copyright (C) 2002, 2005 by the Massachusetts Institute of Technology.
* All rights reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
*
* krb5_init_keyblock- a function to set up
* an empty keyblock
*/
#include "k5-int.h"
#include <assert.h>
krb5_error_code krb5int_c_init_keyblock
(krb5_context context, krb5_enctype enctype,
size_t length, krb5_keyblock **out)
{
krb5_keyblock *kb;
kb = malloc (sizeof(krb5_keyblock));
assert (out);
*out = NULL;
if (!kb) {
return ENOMEM;
}
kb->magic = KV5M_KEYBLOCK;
kb->enctype = enctype;
kb->length = length;
if(length) {
kb->contents = malloc (length);
if(!kb->contents) {
free (kb);
return ENOMEM;
}
} else {
kb->contents = NULL;
}
*out = kb;
return 0;
}
void KRB5_CALLCONV
krb5int_c_free_keyblock(krb5_context context, register krb5_keyblock *val)
{
krb5int_c_free_keyblock_contents(context, val);
krb5_xfree(val);
}
void
krb5int_c_free_keyblock_contents(krb5_context context, register krb5_keyblock *key)
{
if (key->contents) {
krb5int_zap_data (key->contents, key->length);
krb5_xfree(key->contents);
key->contents = 0;
}
}
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