/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright (C) 1998 by the FundsXpress, INC.
*
* 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 FundsXpress. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. FundsXpress makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include "crypto_int.h"
krb5_error_code KRB5_CALLCONV
krb5_c_make_random_key(krb5_context context, krb5_enctype enctype,
krb5_keyblock *random_key)
{
krb5_error_code ret;
const struct krb5_keytypes *ktp;
const struct krb5_enc_provider *enc;
size_t keybytes, keylength;
krb5_data random_data;
unsigned char *bytes = NULL;
ktp = find_enctype(enctype);
if (ktp == NULL)
return KRB5_BAD_ENCTYPE;
enc = ktp->enc;
keybytes = enc->keybytes;
keylength = enc->keylength;
bytes = k5alloc(keybytes, &ret);
if (ret)
return ret;
random_key->contents = k5alloc(keylength, &ret);
if (ret)
goto cleanup;
random_data.data = (char *) bytes;
random_data.length = keybytes;
ret = krb5_c_random_make_octets(context, &random_data);
if (ret)
goto cleanup;
random_key->magic = KV5M_KEYBLOCK;
random_key->enctype = enctype;
random_key->length = keylength;
ret = (*ktp->rand2key)(&random_data, random_key);
cleanup:
if (ret) {
zapfree(random_key->contents, keylength);
random_key->contents = NULL;
}
zapfree(bytes, keybytes);
return ret;
}