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/*
* 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"
#include <nettle/md5.h>
#include <nettle/sha.h>
#include <nettle/ripemd160.h>
#ifdef CONFIG_CRYPTO_SM3
#include <nettle/sm3.h>
#endif
typedef void (*qcrypto_nettle_init)(void *ctx);
typedef void (*qcrypto_nettle_write)(void *ctx,
size_t len,
const uint8_t *buf);
typedef void (*qcrypto_nettle_result)(void *ctx,
size_t len,
uint8_t *buf);
union qcrypto_hash_ctx {
struct md5_ctx md5;
struct sha1_ctx sha1;
struct sha224_ctx sha224;
struct sha256_ctx sha256;
struct sha384_ctx sha384;
struct sha512_ctx sha512;
struct ripemd160_ctx ripemd160;
#ifdef CONFIG_CRYPTO_SM3
struct sm3_ctx sm3;
#endif
};
struct qcrypto_hash_alg {
qcrypto_nettle_init init;
qcrypto_nettle_write write;
qcrypto_nettle_result result;
size_t len;
} qcrypto_hash_alg_map[] = {
[QCRYPTO_HASH_ALGO_MD5] = {
.init = (qcrypto_nettle_init)md5_init,
.write = (qcrypto_nettle_write)md5_update,
.result = (qcrypto_nettle_result)md5_digest,
.len = MD5_DIGEST_SIZE,
},
[QCRYPTO_HASH_ALGO_SHA1] = {
.init = (qcrypto_nettle_init)sha1_init,
.write = (qcrypto_nettle_write)sha1_update,
.result = (qcrypto_nettle_result)sha1_digest,
.len = SHA1_DIGEST_SIZE,
},
[QCRYPTO_HASH_ALGO_SHA224] = {
.init = (qcrypto_nettle_init)sha224_init,
.write = (qcrypto_nettle_write)sha224_update,
.result = (qcrypto_nettle_result)sha224_digest,
.len = SHA224_DIGEST_SIZE,
},
[QCRYPTO_HASH_ALGO_SHA256] = {
.init = (qcrypto_nettle_init)sha256_init,
.write = (qcrypto_nettle_write)sha256_update,
.result = (qcrypto_nettle_result)sha256_digest,
.len = SHA256_DIGEST_SIZE,
},
[QCRYPTO_HASH_ALGO_SHA384] = {
.init = (qcrypto_nettle_init)sha384_init,
.write = (qcrypto_nettle_write)sha384_update,
.result = (qcrypto_nettle_result)sha384_digest,
.len = SHA384_DIGEST_SIZE,
},
[QCRYPTO_HASH_ALGO_SHA512] = {
.init = (qcrypto_nettle_init)sha512_init,
.write = (qcrypto_nettle_write)sha512_update,
.result = (qcrypto_nettle_result)sha512_digest,
.len = SHA512_DIGEST_SIZE,
},
[QCRYPTO_HASH_ALGO_RIPEMD160] = {
.init = (qcrypto_nettle_init)ripemd160_init,
.write = (qcrypto_nettle_write)ripemd160_update,
.result = (qcrypto_nettle_result)ripemd160_digest,
.len = RIPEMD160_DIGEST_SIZE,
},
#ifdef CONFIG_CRYPTO_SM3
[QCRYPTO_HASH_ALGO_SM3] = {
.init = (qcrypto_nettle_init)sm3_init,
.write = (qcrypto_nettle_write)sm3_update,
.result = (qcrypto_nettle_result)sm3_digest,
.len = SM3_DIGEST_SIZE,
},
#endif
};
gboolean qcrypto_hash_supports(QCryptoHashAlgo alg)
{
if (alg < G_N_ELEMENTS(qcrypto_hash_alg_map) &&
qcrypto_hash_alg_map[alg].init != NULL) {
return true;
}
return false;
}
static
QCryptoHash *qcrypto_nettle_hash_new(QCryptoHashAlgo alg, Error **errp)
{
QCryptoHash *hash;
hash = g_new(QCryptoHash, 1);
hash->alg = alg;
hash->opaque = g_new(union qcrypto_hash_ctx, 1);
qcrypto_hash_alg_map[alg].init(hash->opaque);
return hash;
}
static
void qcrypto_nettle_hash_free(QCryptoHash *hash)
{
union qcrypto_hash_ctx *ctx = hash->opaque;
g_free(ctx);
g_free(hash);
}
static
int qcrypto_nettle_hash_update(QCryptoHash *hash,
const struct iovec *iov,
size_t niov,
Error **errp)
{
union qcrypto_hash_ctx *ctx = hash->opaque;
for (int i = 0; i < niov; i++) {
qcrypto_hash_alg_map[hash->alg].write(ctx,
iov[i].iov_len,
iov[i].iov_base);
}
return 0;
}
static
int qcrypto_nettle_hash_finalize(QCryptoHash *hash,
uint8_t **result,
size_t *result_len,
Error **errp)
{
union qcrypto_hash_ctx *ctx = hash->opaque;
int ret = qcrypto_hash_alg_map[hash->alg].len;
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;
}
qcrypto_hash_alg_map[hash->alg].result(ctx, *result_len, *result);
return 0;
}
QCryptoHashDriver qcrypto_hash_lib_driver = {
.hash_new = qcrypto_nettle_hash_new,
.hash_update = qcrypto_nettle_hash_update,
.hash_finalize = qcrypto_nettle_hash_finalize,
.hash_free = qcrypto_nettle_hash_free,
};
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