mirror of https://gitlab.com/qemu-project/qemu
115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
/*
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* QEMU Crypto hash algorithms
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*
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* Copyright (c) 2024 Seagate Technology LLC and/or its Affiliates
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* Copyright (c) 2016 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "crypto/hash.h"
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#include "hashpriv.h"
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static int qcrypto_hash_alg_map[QCRYPTO_HASH_ALGO__MAX] = {
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[QCRYPTO_HASH_ALGO_MD5] = G_CHECKSUM_MD5,
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[QCRYPTO_HASH_ALGO_SHA1] = G_CHECKSUM_SHA1,
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[QCRYPTO_HASH_ALGO_SHA224] = -1,
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[QCRYPTO_HASH_ALGO_SHA256] = G_CHECKSUM_SHA256,
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[QCRYPTO_HASH_ALGO_SHA384] = G_CHECKSUM_SHA384,
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[QCRYPTO_HASH_ALGO_SHA512] = G_CHECKSUM_SHA512,
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[QCRYPTO_HASH_ALGO_RIPEMD160] = -1,
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};
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gboolean qcrypto_hash_supports(QCryptoHashAlgo alg)
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{
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if (alg < G_N_ELEMENTS(qcrypto_hash_alg_map) &&
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qcrypto_hash_alg_map[alg] != -1) {
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return true;
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}
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return false;
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}
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static
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QCryptoHash *qcrypto_glib_hash_new(QCryptoHashAlgo alg,
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Error **errp)
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{
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QCryptoHash *hash;
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hash = g_new(QCryptoHash, 1);
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hash->alg = alg;
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hash->opaque = g_checksum_new(qcrypto_hash_alg_map[alg]);
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return hash;
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}
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static
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void qcrypto_glib_hash_free(QCryptoHash *hash)
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{
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if (hash->opaque) {
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g_checksum_free(hash->opaque);
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}
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g_free(hash);
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}
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static
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int qcrypto_glib_hash_update(QCryptoHash *hash,
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const struct iovec *iov,
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size_t niov,
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Error **errp)
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{
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GChecksum *ctx = hash->opaque;
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for (int i = 0; i < niov; i++) {
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g_checksum_update(ctx, iov[i].iov_base, iov[i].iov_len);
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}
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return 0;
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}
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static
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int qcrypto_glib_hash_finalize(QCryptoHash *hash,
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uint8_t **result,
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size_t *result_len,
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Error **errp)
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{
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int ret;
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GChecksum *ctx = hash->opaque;
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ret = g_checksum_type_get_length(qcrypto_hash_alg_map[hash->alg]);
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if (ret < 0) {
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error_setg(errp, "Unable to get hash length");
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*result_len = 0;
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return -1;
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}
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*result_len = ret;
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*result = g_new(uint8_t, *result_len);
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g_checksum_get_digest(ctx, *result, result_len);
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return 0;
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}
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QCryptoHashDriver qcrypto_hash_lib_driver = {
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.hash_new = qcrypto_glib_hash_new,
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.hash_update = qcrypto_glib_hash_update,
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.hash_finalize = qcrypto_glib_hash_finalize,
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.hash_free = qcrypto_glib_hash_free,
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};
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