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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;
assert(out);
*out = NULL;
kb = malloc(sizeof(krb5_keyblock));
if (kb == NULL)
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
krb5int_c_free_keyblock(krb5_context context, register krb5_keyblock *val)
{
krb5int_c_free_keyblock_contents(context, val);
free(val);
}
void
krb5int_c_free_keyblock_contents(krb5_context context, krb5_keyblock *key)
{
if (key && key->contents) {
zapfree(key->contents, key->length);
key->contents = NULL;
}
}
krb5_error_code
krb5int_c_copy_keyblock(krb5_context context, const krb5_keyblock *from,
krb5_keyblock **to)
{
krb5_keyblock *new_key;
krb5_error_code code;
*to = NULL;
new_key = malloc(sizeof(*new_key));
if (!new_key)
return ENOMEM;
code = krb5int_c_copy_keyblock_contents(context, from, new_key);
if (code) {
free(new_key);
return code;
}
*to = new_key;
return 0;
}
krb5_error_code
krb5int_c_copy_keyblock_contents(krb5_context context,
const krb5_keyblock *from, krb5_keyblock *to)
{
*to = *from;
if (to->length) {
to->contents = malloc(to->length);
if (!to->contents)
return ENOMEM;
memcpy(to->contents, from->contents, to->length);
} else
to->contents = 0;
return 0;
}
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