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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
#if defined(__VAES__) && defined(__AVX512F__)
#define u8xN u8x64
#define u32xN u32x16
#define u32xN_min_scalar u32x16_min_scalar
#define u32xN_is_all_zero u32x16_is_all_zero
#define u32xN_splat u32x16_splat
#elif defined(__VAES__)
#define u8xN u8x32
#define u32xN u32x8
#define u32xN_min_scalar u32x8_min_scalar
#define u32xN_is_all_zero u32x8_is_all_zero
#define u32xN_splat u32x8_splat
#else
#define u8xN u8x16
#define u32xN u32x4
#define u32xN_min_scalar u32x4_min_scalar
#define u32xN_is_all_zero u32x4_is_all_zero
#define u32xN_splat u32x4_splat
#endif
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;
int rounds = AES_KEY_ROUNDS (ks);
u8 placeholder[8192];
u32 i, j, count, n_left = n_ops;
u32xN placeholder_mask = { };
u32xN len = { };
vnet_crypto_key_index_t key_index[4 * N_AES_LANES];
u8 *src[4 * N_AES_LANES] = {};
u8 *dst[4 * N_AES_LANES] = {};
u8xN r[4] = {};
u8xN k[15][4] = {};
for (i = 0; i < 4 * N_AES_LANES; i++)
key_index[i] = ~0;
more:
for (i = 0; i < 4 * N_AES_LANES; i++)
if (len[i] == 0)
{
if (n_left == 0)
{
/* no more work to enqueue, so we are enqueueing placeholder buffer */
src[i] = dst[i] = placeholder;
len[i] = sizeof (placeholder);
placeholder_mask[i] = 0;
}
else
{
u8x16 t = aes_block_load (ops[0]->iv);
((u8x16 *) r)[i] = t;
src[i] = ops[0]->src;
dst[i] = ops[0]->dst;
len[i] = ops[0]->len;
placeholder_mask[i] = ~0;
if (key_index[i] != ops[0]->key_index)
{
aes_cbc_key_data_t *kd;
key_index[i] = ops[0]->key_index;
kd = (aes_cbc_key_data_t *) cm->key_data[key_index[i]];
for (j = 0; j < rounds + 1; j++)
((u8x16 *) k[j])[i] = kd->encrypt_key[j];
}
ops[0]->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
n_left--;
ops++;
}
}
count = u32xN_min_scalar (len);
ASSERT (count % 16 == 0);
for (i = 0; i < count; i += 16)
{
#if defined(__VAES__) && defined(__AVX512F__)
r[0] = u8x64_xor3 (r[0], aes_block_load_x4 (src, i), k[0][0]);
r[1] = u8x64_xor3 (r[1], aes_block_load_x4 (src + 4, i), k[0][1]);
r[2] = u8x64_xor3 (r[2], aes_block_load_x4 (src + 8, i), k[0][2]);
r[3] = u8x64_xor3 (r[3], aes_block_load_x4 (src + 12, i), k[0][3]);
for (j = 1; j < rounds; j++)
{
r[0] = aes_enc_round_x4 (r[0], k[j][0]);
r[1] = aes_enc_round_x4 (r[1], k[j][1]);
r[2] = aes_enc_round_x4 (r[2], k[j][2]);
r[3] = aes_enc_round_x4 (r[3], k[j][3]);
}
r[0] = aes_enc_last_round_x4 (r[0], k[j][0]);
r[1] = aes_enc_last_round_x4 (r[1], k[j][1]);
r[2] = aes_enc_last_round_x4 (r[2], k[j][2]);
r[3] = aes_enc_last_round_x4 (r[3], k[j][3]);
aes_block_store_x4 (dst, i, r[0]);
aes_block_store_x4 (dst + 4, i, r[1]);
aes_block_store_x4 (dst + 8, i, r[2]);
aes_block_store_x4 (dst + 12, i, r[3]);
#elif defined(__VAES__)
r[0] = u8x32_xor3 (r[0], aes_block_load_x2 (src, i), k[0][0]);
r[1] = u8x32_xor3 (r[1], aes_block_load_x2 (src + 2, i), k[0][1]);
r[2] = u8x32_xor3 (r[2], aes_block_load_x2 (src + 4, i), k[0][2]);
r[3] = u8x32_xor3 (r[3], aes_block_load_x2 (src + 6, i), k[0][3]);
for (j = 1; j < rounds; j++)
{
r[0] = aes_enc_round_x2 (r[0], k[j][0]);
r[1] = aes_enc_round_x2 (r[1], k[j][1]);
r[2] = aes_enc_round_x2 (r[2], k[j][2]);
r[3] = aes_enc_round_x2 (r[3], k[j][3]);
}
r[0] = aes_enc_last_round_x2 (r[0], k[j][0]);
r[1] = aes_enc_last_round_x2 (r[1], k[j][1]);
r[2] = aes_enc_last_round_x2 (r[2], k[j][2]);
r[3] = aes_enc_last_round_x2 (r[3], k[j][3]);
aes_block_store_x2 (dst, i, r[0]);
aes_block_store_x2 (dst + 2, i, r[1]);
aes_block_store_x2 (dst + 4, i, r[2]);
aes_block_store_x2 (dst + 6, i, r[3]);
#else
#if __x86_64__
r[0] = u8x16_xor3 (r[0], aes_block_load (src[0] + i), k[0][0]);
r[1] = u8x16_xor3 (r[1], aes_block_load (src[1] + i), k[0][1]);
r[2] = u8x16_xor3 (r[2], aes_block_load (src[2] + i), k[0][2]);
r[3] = u8x16_xor3 (r[3], aes_block_load (src[3] + i), k[0][3]);
for (j = 1; j < rounds; j++)
{
r[0] = aes_enc_round_x1 (r[0], k[j][0]);
r[1] = aes_enc_round_x1 (r[1], k[j][1]);
r[2] = aes_enc_round_x1 (r[2], k[j][2]);
r[3] = aes_enc_round_x1 (r[3], k[j][3]);
}
r[0] = aes_enc_last_round_x1 (r[0], k[j][0]);
r[1] = aes_enc_last_round_x1 (r[1], k[j][1]);
r[2] = aes_enc_last_round_x1 (r[2], k[j][2]);
r[3] = aes_enc_last_round_x1 (r[3], k[j][3]);
aes_block_store (dst[0] + i, r[0]);
aes_block_store (dst[1] + i, r[1]);
aes_block_store (dst[2] + i, r[2]);
aes_block_store (dst[3] + i, r[3]);
#else
r[0] ^= aes_block_load (src[0] + i);
r[1] ^= aes_block_load (src[1] + i);
r[2] ^= aes_block_load (src[2] + i);
r[3] ^= aes_block_load (src[3] + i);
for (j = 0; j < rounds - 1; j++)
{
r[0] = vaesmcq_u8 (vaeseq_u8 (r[0], k[j][0]));
r[1] = vaesmcq_u8 (vaeseq_u8 (r[1], k[j][1]));
r[2] = vaesmcq_u8 (vaeseq_u8 (r[2], k[j][2]));
r[3] = vaesmcq_u8 (vaeseq_u8 (r[3], k[j][3]));
}
r[0] = vaeseq_u8 (r[0], k[j][0]) ^ k[rounds][0];
r[1] = vaeseq_u8 (r[1], k[j][1]) ^ k[rounds][1];
r[2] = vaeseq_u8 (r[2], k[j][2]) ^ k[rounds][2];
r[3] = vaeseq_u8 (r[3], k[j][3]) ^ k[rounds][3];
aes_block_store (dst[0] + i, r[0]);
aes_block_store (dst[1] + i, r[1]);
aes_block_store (dst[2] + i, r[2]);
aes_block_store (dst[3] + i, r[3]);
#endif
#endif
}
len -= u32xN_splat (count);
for (i = 0; i < 4 * N_AES_LANES; i++)
{
src[i] += count;
dst[i] += count;
}
if (n_left > 0)
goto more;
if (!u32xN_is_all_zero (len & placeholder_mask))
goto more;
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 _
|
