d946043c77
Removes old hash implementation in the gnutls hash driver. Signed-off-by: Alejandro Zeise <alejandro.zeise@seagate.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> [ clg: - Fixed spelling in commit log ] Signed-off-by: Cédric Le Goater <clg@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
136 lines
3.8 KiB
C
136 lines
3.8 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) 2021 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 <gnutls/crypto.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] = GNUTLS_DIG_MD5,
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[QCRYPTO_HASH_ALGO_SHA1] = GNUTLS_DIG_SHA1,
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[QCRYPTO_HASH_ALGO_SHA224] = GNUTLS_DIG_SHA224,
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[QCRYPTO_HASH_ALGO_SHA256] = GNUTLS_DIG_SHA256,
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[QCRYPTO_HASH_ALGO_SHA384] = GNUTLS_DIG_SHA384,
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[QCRYPTO_HASH_ALGO_SHA512] = GNUTLS_DIG_SHA512,
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[QCRYPTO_HASH_ALGO_RIPEMD160] = GNUTLS_DIG_RMD160,
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};
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gboolean qcrypto_hash_supports(QCryptoHashAlgo alg)
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{
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size_t i;
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const gnutls_digest_algorithm_t *algs;
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if (alg >= G_N_ELEMENTS(qcrypto_hash_alg_map) ||
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qcrypto_hash_alg_map[alg] == GNUTLS_DIG_UNKNOWN) {
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return false;
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}
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algs = gnutls_digest_list();
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for (i = 0; algs[i] != GNUTLS_DIG_UNKNOWN; i++) {
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if (algs[i] == qcrypto_hash_alg_map[alg]) {
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return true;
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}
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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_gnutls_hash_new(QCryptoHashAlgo alg, Error **errp)
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{
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QCryptoHash *hash;
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int ret;
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hash = g_new(QCryptoHash, 1);
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hash->alg = alg;
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hash->opaque = g_new(gnutls_hash_hd_t, 1);
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ret = gnutls_hash_init(hash->opaque, qcrypto_hash_alg_map[alg]);
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if (ret < 0) {
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error_setg(errp,
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"Unable to initialize hash algorithm: %s",
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gnutls_strerror(ret));
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g_free(hash->opaque);
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g_free(hash);
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return NULL;
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}
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return hash;
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}
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static
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void qcrypto_gnutls_hash_free(QCryptoHash *hash)
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{
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gnutls_hash_hd_t *ctx = hash->opaque;
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gnutls_hash_deinit(*ctx, NULL);
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g_free(ctx);
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g_free(hash);
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}
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static
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int qcrypto_gnutls_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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int ret = 0;
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gnutls_hash_hd_t *ctx = hash->opaque;
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for (int i = 0; i < niov; i++) {
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ret = gnutls_hash(*ctx, iov[i].iov_base, iov[i].iov_len);
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if (ret != 0) {
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error_setg(errp, "Failed to hash data: %s",
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gnutls_strerror(ret));
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return -1;
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}
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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_gnutls_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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gnutls_hash_hd_t *ctx = hash->opaque;
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*result_len = gnutls_hash_get_len(qcrypto_hash_alg_map[hash->alg]);
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if (*result_len == 0) {
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error_setg(errp, "Unable to get hash length");
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return -1;
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}
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*result = g_new(uint8_t, *result_len);
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gnutls_hash_output(*ctx, *result);
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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_gnutls_hash_new,
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.hash_update = qcrypto_gnutls_hash_update,
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.hash_finalize = qcrypto_gnutls_hash_finalize,
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.hash_free = qcrypto_gnutls_hash_free,
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};
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