cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

ivgen.c (2629B)

      1/*
      2 * QEMU Crypto block IV generator
      3 *
      4 * Copyright (c) 2015-2016 Red Hat, Inc.
      5 *
      6 * This library is free software; you can redistribute it and/or
      7 * modify it under the terms of the GNU Lesser General Public
      8 * License as published by the Free Software Foundation; either
      9 * version 2.1 of the License, or (at your option) any later version.
     10 *
     11 * This library is distributed in the hope that it will be useful,
     12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14 * Lesser General Public License for more details.
     15 *
     16 * You should have received a copy of the GNU Lesser General Public
     17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
     18 *
     19 */
     20
     21#include "qemu/osdep.h"
     22#include "qapi/error.h"
     23
     24#include "ivgenpriv.h"
     25#include "ivgen-plain.h"
     26#include "ivgen-plain64.h"
     27#include "ivgen-essiv.h"
     28
     29
     30QCryptoIVGen *qcrypto_ivgen_new(QCryptoIVGenAlgorithm alg,
     31                                QCryptoCipherAlgorithm cipheralg,
     32                                QCryptoHashAlgorithm hash,
     33                                const uint8_t *key, size_t nkey,
     34                                Error **errp)
     35{
     36    QCryptoIVGen *ivgen = g_new0(QCryptoIVGen, 1);
     37
     38    ivgen->algorithm = alg;
     39    ivgen->cipher = cipheralg;
     40    ivgen->hash = hash;
     41
     42    switch (alg) {
     43    case QCRYPTO_IVGEN_ALG_PLAIN:
     44        ivgen->driver = &qcrypto_ivgen_plain;
     45        break;
     46    case QCRYPTO_IVGEN_ALG_PLAIN64:
     47        ivgen->driver = &qcrypto_ivgen_plain64;
     48        break;
     49    case QCRYPTO_IVGEN_ALG_ESSIV:
     50        ivgen->driver = &qcrypto_ivgen_essiv;
     51        break;
     52    default:
     53        error_setg(errp, "Unknown block IV generator algorithm %d", alg);
     54        g_free(ivgen);
     55        return NULL;
     56    }
     57
     58    if (ivgen->driver->init(ivgen, key, nkey, errp) < 0) {
     59        g_free(ivgen);
     60        return NULL;
     61    }
     62
     63    return ivgen;
     64}
     65
     66
     67int qcrypto_ivgen_calculate(QCryptoIVGen *ivgen,
     68                            uint64_t sector,
     69                            uint8_t *iv, size_t niv,
     70                            Error **errp)
     71{
     72    return ivgen->driver->calculate(ivgen, sector, iv, niv, errp);
     73}
     74
     75
     76QCryptoIVGenAlgorithm qcrypto_ivgen_get_algorithm(QCryptoIVGen *ivgen)
     77{
     78    return ivgen->algorithm;
     79}
     80
     81
     82QCryptoCipherAlgorithm qcrypto_ivgen_get_cipher(QCryptoIVGen *ivgen)
     83{
     84    return ivgen->cipher;
     85}
     86
     87
     88QCryptoHashAlgorithm qcrypto_ivgen_get_hash(QCryptoIVGen *ivgen)
     89{
     90    return ivgen->hash;
     91}
     92
     93
     94void qcrypto_ivgen_free(QCryptoIVGen *ivgen)
     95{
     96    if (!ivgen) {
     97        return;
     98    }
     99    ivgen->driver->cleanup(ivgen);
    100    g_free(ivgen);
    101}