qemu/crypto/ivgen-plain64.c
Thomas Huth b7cbb8741b crypto: Fix LGPL information in the file headers
It's either "GNU *Library* General Public License version 2" or "GNU
Lesser General Public License version *2.1*", but there was no "version
2.0" of the "Lesser" license. So assume that version 2.1 is meant here.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2019-07-19 14:21:25 +01:00

61 lines
1.8 KiB
C

/*
* QEMU Crypto block IV generator - plain
*
* Copyright (c) 2015-2016 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "qemu/bswap.h"
#include "ivgen-plain.h"
static int qcrypto_ivgen_plain_init(QCryptoIVGen *ivgen,
const uint8_t *key, size_t nkey,
Error **errp)
{
return 0;
}
static int qcrypto_ivgen_plain_calculate(QCryptoIVGen *ivgen,
uint64_t sector,
uint8_t *iv, size_t niv,
Error **errp)
{
size_t ivprefix;
ivprefix = sizeof(sector);
sector = cpu_to_le64(sector);
if (ivprefix > niv) {
ivprefix = niv;
}
memcpy(iv, &sector, ivprefix);
if (ivprefix < niv) {
memset(iv + ivprefix, 0, niv - ivprefix);
}
return 0;
}
static void qcrypto_ivgen_plain_cleanup(QCryptoIVGen *ivgen)
{
}
struct QCryptoIVGenDriver qcrypto_ivgen_plain64 = {
.init = qcrypto_ivgen_plain_init,
.calculate = qcrypto_ivgen_plain_calculate,
.cleanup = qcrypto_ivgen_plain_cleanup,
};