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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_cbc.h>
#if __GNUC__ > 4 && !__clang__ && CLIB_DEBUG == 0
#pragma GCC optimize ("O3")
#endif
#define CRYPTO_NATIVE_AES_CBC_ENC_VEC_SIZE 256
static_always_inline u32
aes_ops_enc_aes_cbc (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;
u32 i, n_left = n_ops;
uword key_indices[CRYPTO_NATIVE_AES_CBC_ENC_VEC_SIZE] = {};
u8 *plaintext[CRYPTO_NATIVE_AES_CBC_ENC_VEC_SIZE] = {};
uword oplen[CRYPTO_NATIVE_AES_CBC_ENC_VEC_SIZE] = {};
u8 *iv[CRYPTO_NATIVE_AES_CBC_ENC_VEC_SIZE] = {};
u8 *ciphertext[CRYPTO_NATIVE_AES_CBC_ENC_VEC_SIZE] = {};
while (n_left)
{
i = 0;
while (n_left && i < CRYPTO_NATIVE_AES_CBC_ENC_VEC_SIZE)
{
key_indices[i] = ops[0]->key_index;
plaintext[i] = ops[0]->src;
ciphertext[i] = ops[0]->dst;
oplen[i] = ops[0]->len;
iv[i] = ops[0]->iv;
ops[0]->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
ops++;
n_left--;
i++;
}
clib_aes_cbc_encrypt_multi ((aes_cbc_key_data_t **) cm->key_data,
key_indices, plaintext, oplen, iv, ks,
ciphertext, i);
}
return n_ops;
}
static_always_inline u32
aes_ops_dec_aes_cbc (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;
int rounds = AES_KEY_ROUNDS (ks);
vnet_crypto_op_t *op = ops[0];
aes_cbc_key_data_t *kd = (aes_cbc_key_data_t *) cm->key_data[op->key_index];
u32 n_left = n_ops;
ASSERT (n_ops >= 1);
decrypt:
#if defined(__VAES__) && defined(__AVX512F__)
aes4_cbc_dec (kd->decrypt_key, (u8x64u *) op->src, (u8x64u *) op->dst,
(u8x16u *) op->iv, op->len, rounds);
#elif defined(__VAES__)
aes2_cbc_dec (kd->decrypt_key, (u8x32u *) op->src, (u8x32u *) op->dst,
(u8x16u *) op->iv, op->len, rounds);
#else
aes_cbc_dec (kd->decrypt_key, (u8x16u *) op->src, (u8x16u *) op->dst,
(u8x16u *) op->iv, op->len, rounds);
#endif
op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
if (--n_left)
{
op += 1;
kd = (aes_cbc_key_data_t *) cm->key_data[op->key_index];
goto decrypt;
}
return n_ops;
}
static int
aes_cbc_cpu_probe ()
{
#if defined(__VAES__) && defined(__AVX512F__)
if (clib_cpu_supports_vaes () && clib_cpu_supports_avx512f ())
return 50;
#elif defined(__VAES__)
if (clib_cpu_supports_vaes ())
return 40;
#elif defined(__AVX512F__)
if (clib_cpu_supports_avx512f ())
return 30;
#elif defined(__AVX2__)
if (clib_cpu_supports_avx2 ())
return 20;
#elif __AES__
if (clib_cpu_supports_aes ())
return 10;
#elif __aarch64__
if (clib_cpu_supports_aarch64_aes ())
return 10;
#endif
return -1;
}
static void *
aes_cbc_key_exp_128 (vnet_crypto_key_t *key)
{
aes_cbc_key_data_t *kd;
kd = clib_mem_alloc_aligned (sizeof (*kd), CLIB_CACHE_LINE_BYTES);
clib_aes128_cbc_key_expand (kd, key->data);
return kd;
}
static void *
aes_cbc_key_exp_192 (vnet_crypto_key_t *key)
{
aes_cbc_key_data_t *kd;
kd = clib_mem_alloc_aligned (sizeof (*kd), CLIB_CACHE_LINE_BYTES);
clib_aes192_cbc_key_expand (kd, key->data);
return kd;
}
static void *
aes_cbc_key_exp_256 (vnet_crypto_key_t *key)
{
aes_cbc_key_data_t *kd;
kd = clib_mem_alloc_aligned (sizeof (*kd), CLIB_CACHE_LINE_BYTES);
clib_aes256_cbc_key_expand (kd, key->data);
return kd;
}
#define foreach_aes_cbc_handler_type _ (128) _ (192) _ (256)
#define _(x) \
static u32 aes_ops_enc_aes_cbc_##x (vlib_main_t *vm, \
vnet_crypto_op_t *ops[], u32 n_ops) \
{ \
return aes_ops_enc_aes_cbc (vm, ops, n_ops, AES_KEY_##x); \
} \
\
CRYPTO_NATIVE_OP_HANDLER (aes_##x##_cbc_enc) = { \
.op_id = VNET_CRYPTO_OP_AES_##x##_CBC_ENC, \
.fn = aes_ops_enc_aes_cbc_##x, \
.probe = aes_cbc_cpu_probe, \
}; \
\
static u32 aes_ops_dec_aes_cbc_##x (vlib_main_t *vm, \
vnet_crypto_op_t *ops[], u32 n_ops) \
{ \
return aes_ops_dec_aes_cbc (vm, ops, n_ops, AES_KEY_##x); \
} \
\
CRYPTO_NATIVE_OP_HANDLER (aes_##x##_cbc_dec) = { \
.op_id = VNET_CRYPTO_OP_AES_##x##_CBC_DEC, \
.fn = aes_ops_dec_aes_cbc_##x, \
.probe = aes_cbc_cpu_probe, \
}; \
\
CRYPTO_NATIVE_KEY_HANDLER (aes_##x##_cbc) = { \
.alg_id = VNET_CRYPTO_ALG_AES_##x##_CBC, \
.key_fn = aes_cbc_key_exp_##x, \
.probe = aes_cbc_cpu_probe, \
};
foreach_aes_cbc_handler_type;
#undef _
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