dde538c9a7
If the user provides a pre-allocated buffer for the hash result, we must use that rather than re-allocating a new buffer. Reported-by: Dorjoy Chowdhury <dorjoychy111@gmail.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/*
|
|
* QEMU Crypto hash algorithms
|
|
*
|
|
* Copyright (c) 2024 Seagate Technology LLC and/or its Affiliates
|
|
* Copyright (c) 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 "qapi/error.h"
|
|
#include "crypto/hash.h"
|
|
#include "hashpriv.h"
|
|
|
|
|
|
static int qcrypto_hash_alg_map[QCRYPTO_HASH_ALGO__MAX] = {
|
|
[QCRYPTO_HASH_ALGO_MD5] = G_CHECKSUM_MD5,
|
|
[QCRYPTO_HASH_ALGO_SHA1] = G_CHECKSUM_SHA1,
|
|
[QCRYPTO_HASH_ALGO_SHA224] = -1,
|
|
[QCRYPTO_HASH_ALGO_SHA256] = G_CHECKSUM_SHA256,
|
|
[QCRYPTO_HASH_ALGO_SHA384] = G_CHECKSUM_SHA384,
|
|
[QCRYPTO_HASH_ALGO_SHA512] = G_CHECKSUM_SHA512,
|
|
[QCRYPTO_HASH_ALGO_RIPEMD160] = -1,
|
|
};
|
|
|
|
gboolean qcrypto_hash_supports(QCryptoHashAlgo alg)
|
|
{
|
|
if (alg < G_N_ELEMENTS(qcrypto_hash_alg_map) &&
|
|
qcrypto_hash_alg_map[alg] != -1) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static
|
|
QCryptoHash *qcrypto_glib_hash_new(QCryptoHashAlgo alg,
|
|
Error **errp)
|
|
{
|
|
QCryptoHash *hash;
|
|
|
|
hash = g_new(QCryptoHash, 1);
|
|
hash->alg = alg;
|
|
hash->opaque = g_checksum_new(qcrypto_hash_alg_map[alg]);
|
|
|
|
return hash;
|
|
}
|
|
|
|
static
|
|
void qcrypto_glib_hash_free(QCryptoHash *hash)
|
|
{
|
|
if (hash->opaque) {
|
|
g_checksum_free(hash->opaque);
|
|
}
|
|
|
|
g_free(hash);
|
|
}
|
|
|
|
|
|
static
|
|
int qcrypto_glib_hash_update(QCryptoHash *hash,
|
|
const struct iovec *iov,
|
|
size_t niov,
|
|
Error **errp)
|
|
{
|
|
GChecksum *ctx = hash->opaque;
|
|
|
|
for (int i = 0; i < niov; i++) {
|
|
g_checksum_update(ctx, iov[i].iov_base, iov[i].iov_len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
int qcrypto_glib_hash_finalize(QCryptoHash *hash,
|
|
uint8_t **result,
|
|
size_t *result_len,
|
|
Error **errp)
|
|
{
|
|
int ret;
|
|
GChecksum *ctx = hash->opaque;
|
|
|
|
ret = g_checksum_type_get_length(qcrypto_hash_alg_map[hash->alg]);
|
|
if (ret < 0) {
|
|
error_setg(errp, "Unable to get hash length");
|
|
*result_len = 0;
|
|
return -1;
|
|
}
|
|
|
|
if (*result_len == 0) {
|
|
*result_len = ret;
|
|
*result = g_new(uint8_t, *result_len);
|
|
} else if (*result_len != ret) {
|
|
error_setg(errp,
|
|
"Result buffer size %zu is smaller than hash %d",
|
|
*result_len, ret);
|
|
return -1;
|
|
}
|
|
|
|
g_checksum_get_digest(ctx, *result, result_len);
|
|
return 0;
|
|
}
|
|
|
|
QCryptoHashDriver qcrypto_hash_lib_driver = {
|
|
.hash_new = qcrypto_glib_hash_new,
|
|
.hash_update = qcrypto_glib_hash_update,
|
|
.hash_finalize = qcrypto_glib_hash_finalize,
|
|
.hash_free = qcrypto_glib_hash_free,
|
|
};
|