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/*
*------------------------------------------------------------------
* Copyright (c) 2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*------------------------------------------------------------------
*/
#include <vlib/vlib.h>
#include <vnet/plugin/plugin.h>
#include <vnet/crypto/crypto.h>
#include <crypto_native/crypto_native.h>
#include <vppinfra/crypto/aes_gcm.h>
#if __GNUC__ > 4 && !__clang__ && CLIB_DEBUG == 0
#pragma GCC optimize("O3")
#endif
static_always_inline u32
aes_ops_enc_aes_gcm (vlib_main_t *vm, vnet_crypto_op_t *ops[], u32 n_ops,
aes_key_size_t ks)
{
crypto_native_main_t *cm = &crypto_native_main;
vnet_crypto_op_t *op = ops[0];
aes_gcm_key_data_t *kd;
u32 n_left = n_ops;
next:
kd = (aes_gcm_key_data_t *) cm->key_data[op->key_index];
aes_gcm (op->src, op->dst, op->aad, (u8 *) op->iv, op->tag, op->len,
op->aad_len, op->tag_len, kd, AES_KEY_ROUNDS (ks),
AES_GCM_OP_ENCRYPT);
op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
if (--n_left)
{
op += 1;
goto next;
}
return n_ops;
}
static_always_inline u32
aes_ops_dec_aes_gcm (vlib_main_t *vm, vnet_crypto_op_t *ops[], u32 n_ops,
aes_key_size_t ks)
{
crypto_native_main_t *cm = &crypto_native_main;
vnet_crypto_op_t *op = ops[0];
aes_gcm_key_data_t *kd;
u32 n_left = n_ops;
int rv;
next:
kd = (aes_gcm_key_data_t *) cm->key_data[op->key_index];
rv = aes_gcm (op->src, op->dst, op->aad, (u8 *) op->iv, op->tag, op->len,
op->aad_len, op->tag_len, kd, AES_KEY_ROUNDS (ks),
AES_GCM_OP_DECRYPT);
if (rv)
{
op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
}
else
{
op->status = VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC;
n_ops--;
}
if (--n_left)
{
op += 1;
goto next;
}
return n_ops;
}
static_always_inline void *
aes_gcm_key_exp (vnet_crypto_key_t *key, aes_key_size_t ks)
{
aes_gcm_key_data_t *kd;
kd = clib_mem_alloc_aligned (sizeof (*kd), CLIB_CACHE_LINE_BYTES);
clib_aes_gcm_key_expand (kd, key->data, ks);
return kd;
}
#define foreach_aes_gcm_handler_type _ (128) _ (192) _ (256)
#define _(x) \
static u32 aes_ops_dec_aes_gcm_##x (vlib_main_t *vm, \
vnet_crypto_op_t *ops[], u32 n_ops) \
{ \
return aes_ops_dec_aes_gcm (vm, ops, n_ops, AES_KEY_##x); \
} \
static u32 aes_ops_enc_aes_gcm_##x (vlib_main_t *vm, \
vnet_crypto_op_t *ops[], u32 n_ops) \
{ \
return aes_ops_enc_aes_gcm (vm, ops, n_ops, AES_KEY_##x); \
} \
static void *aes_gcm_key_exp_##x (vnet_crypto_key_t *key) \
{ \
return aes_gcm_key_exp (key, AES_KEY_##x); \
}
foreach_aes_gcm_handler_type;
#undef _
static int
probe ()
{
#if defined(__VAES__) && defined(__AVX512F__)
if (clib_cpu_supports_vpclmulqdq () && clib_cpu_supports_vaes () &&
clib_cpu_supports_avx512f ())
return 50;
#elif defined(__VAES__)
if (clib_cpu_supports_vpclmulqdq () && clib_cpu_supports_vaes ())
return 40;
#elif defined(__AVX512F__)
if (clib_cpu_supports_pclmulqdq () && clib_cpu_supports_avx512f ())
return 30;
#elif defined(__AVX2__)
if (clib_cpu_supports_pclmulqdq () && clib_cpu_supports_avx2 ())
return 20;
#elif __AES__
if (clib_cpu_supports_pclmulqdq () && clib_cpu_supports_aes ())
return 10;
#elif __aarch64__
if (clib_cpu_supports_aarch64_aes ())
return 10;
#endif
return -1;
}
#define _(b) \
CRYPTO_NATIVE_OP_HANDLER (aes_##b##_gcm_enc) = { \
.op_id = VNET_CRYPTO_OP_AES_##b##_GCM_ENC, \
.fn = aes_ops_enc_aes_gcm_##b, \
.probe = probe, \
}; \
\
CRYPTO_NATIVE_OP_HANDLER (aes_##b##_gcm_dec) = { \
.op_id = VNET_CRYPTO_OP_AES_##b##_GCM_DEC, \
.fn = aes_ops_dec_aes_gcm_##b, \
.probe = probe, \
}; \
CRYPTO_NATIVE_KEY_HANDLER (aes_##b##_gcm) = { \
.alg_id = VNET_CRYPTO_ALG_AES_##b##_GCM, \
.key_fn = aes_gcm_key_exp_##b, \
.probe = probe, \
};
_ (128) _ (192) _ (256)
#undef _
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