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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_ia32/crypto_ia32.h>
#include <crypto_ia32/aesni.h>
crypto_ia32_main_t crypto_ia32_main;
static void
crypto_ia32_key_handler (vlib_main_t * vm, vnet_crypto_key_op_t kop,
vnet_crypto_key_index_t idx)
{
vnet_crypto_key_t *key = vnet_crypto_get_key (idx);
crypto_ia32_main_t *cm = &crypto_ia32_main;
aesni_key_data_t *kd;
switch (key->alg)
{
case VNET_CRYPTO_ALG_AES_128_CBC:
case VNET_CRYPTO_ALG_AES_192_CBC:
case VNET_CRYPTO_ALG_AES_256_CBC:
break;
default:
return;
break;
}
if (kop == VNET_CRYPTO_KEY_OP_DEL)
{
if (idx >= vec_len (cm->key_data))
return;
if (cm->key_data[idx] == 0)
return;
clib_memset_u8 (cm->key_data[idx], 0,
clib_mem_size (cm->key_data[idx]));
clib_mem_free (cm->key_data[idx]);
cm->key_data[idx] = 0;
return;
}
vec_validate_aligned (cm->key_data, idx, CLIB_CACHE_LINE_BYTES);
if (kop == VNET_CRYPTO_KEY_OP_MODIFY && cm->key_data[idx])
{
clib_memset_u8 (cm->key_data[idx], 0,
clib_mem_size (cm->key_data[idx]));
clib_mem_free (cm->key_data[idx]);
}
kd = cm->key_data[idx] = clib_mem_alloc_aligned (sizeof (aesni_key_data_t),
CLIB_CACHE_LINE_BYTES);
/* ADD or MODIFY */
switch (key->alg)
{
case VNET_CRYPTO_ALG_AES_128_CBC:
aes_key_expand (kd->encrypt_key, key->data, AESNI_KEY_128);
aes_key_expand (kd->decrypt_key, key->data, AESNI_KEY_128);
aes_key_enc_to_dec (kd->decrypt_key, AESNI_KEY_128);
break;
case VNET_CRYPTO_ALG_AES_192_CBC:
aes_key_expand (kd->encrypt_key, key->data, AESNI_KEY_192);
aes_key_expand (kd->decrypt_key, key->data, AESNI_KEY_192);
aes_key_enc_to_dec (kd->decrypt_key, AESNI_KEY_192);
break;
case VNET_CRYPTO_ALG_AES_256_CBC:
aes_key_expand (kd->encrypt_key, key->data, AESNI_KEY_256);
aes_key_expand (kd->decrypt_key, key->data, AESNI_KEY_256);
aes_key_enc_to_dec (kd->decrypt_key, AESNI_KEY_256);
break;
default:
return;
break;
}
}
clib_error_t *
crypto_ia32_init (vlib_main_t * vm)
{
crypto_ia32_main_t *cm = &crypto_ia32_main;
vlib_thread_main_t *tm = vlib_get_thread_main ();
clib_error_t *error;
if ((error = vlib_call_init_function (vm, vnet_crypto_init)))
return error;
vec_validate_aligned (cm->per_thread_data, tm->n_vlib_mains - 1,
CLIB_CACHE_LINE_BYTES);
cm->crypto_engine_index =
vnet_crypto_register_engine (vm, "ia32", 100,
"Intel IA32 ISA Optimized Crypto");
if (clib_cpu_supports_x86_aes () &&
(error = crypto_ia32_aesni_cbc_init (vm)))
goto error;
vnet_crypto_register_key_handler (vm, cm->crypto_engine_index,
crypto_ia32_key_handler);
error:
if (error)
vec_free (cm->per_thread_data);
return error;
}
VLIB_INIT_FUNCTION (crypto_ia32_init);
#include <vpp/app/version.h>
/* *INDENT-OFF* */
VLIB_PLUGIN_REGISTER () = {
.version = VPP_BUILD_VER,
.description = "Intel AESNI Software Crypto Backend Plugin",
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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