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/*
* Copyright (c) 2020 Intel 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 <vnet/crypto/crypto.h>
#include <vnet/tls/tls.h>
#include <picotls/openssl.h>
#include <picotls.h>
#include "pico_vpp_crypto.h"
typedef void (*ptls_vpp_do_transform_fn) (ptls_cipher_context_t *, void *,
const void *, size_t);
vnet_crypto_main_t *cm = &crypto_main;
struct cipher_context_t
{
ptls_cipher_context_t super;
vnet_crypto_op_t op;
u32 key_index;
};
struct vpp_aead_context_t
{
ptls_aead_context_t super;
vnet_crypto_op_t op;
vnet_crypto_op_chunk_t chunks[2];
vnet_crypto_alg_t alg;
u32 key_index;
u32 chunk_index;
};
static void
ptls_vpp_crypto_cipher_do_init (ptls_cipher_context_t * _ctx, const void *iv)
{
struct cipher_context_t *ctx = (struct cipher_context_t *) _ctx;
vnet_crypto_op_id_t id;
if (!strcmp (ctx->super.algo->name, "AES128-CTR"))
{
id = VNET_CRYPTO_OP_AES_128_CTR_ENC;
}
else if (!strcmp (ctx->super.algo->name, "AES256-CTR"))
{
id = VNET_CRYPTO_OP_AES_256_CTR_ENC;
}
else
{
TLS_DBG (1, "%s, Invalid crypto cipher : ", __FUNCTION__,
_ctx->algo->name);
assert (0);
}
vnet_crypto_op_init (&ctx->op, id);
ctx->op.iv = (u8 *) iv;
ctx->op.key_index = ctx->key_index;
}
static void
ptls_vpp_crypto_cipher_dispose (ptls_cipher_context_t * _ctx)
{
/* Do nothing */
}
static void
ptls_vpp_crypto_cipher_encrypt (ptls_cipher_context_t * _ctx, void *output,
const void *input, size_t _len)
{
vlib_main_t *vm = vlib_get_main ();
struct cipher_context_t *ctx = (struct cipher_context_t *) _ctx;
ctx->op.src = (u8 *) input;
ctx->op.dst = output;
ctx->op.len = _len;
vnet_crypto_process_ops (vm, &ctx->op, 1);
}
static int
ptls_vpp_crypto_cipher_setup_crypto (ptls_cipher_context_t * _ctx, int is_enc,
const void *key,
const EVP_CIPHER * cipher,
ptls_vpp_do_transform_fn do_transform)
{
struct cipher_context_t *ctx = (struct cipher_context_t *) _ctx;
ctx->super.do_dispose = ptls_vpp_crypto_cipher_dispose;
ctx->super.do_init = ptls_vpp_crypto_cipher_do_init;
ctx->super.do_transform = do_transform;
vlib_main_t *vm = vlib_get_main ();
vnet_crypto_alg_t algo;
if (!strcmp (ctx->super.algo->name, "AES128-CTR"))
{
algo = VNET_CRYPTO_ALG_AES_128_CTR;
}
else if (!strcmp (ctx->super.algo->name, "AES256-CTR"))
{
algo = VNET_CRYPTO_ALG_AES_256_CTR;
}
else
{
TLS_DBG (1, "%s, Invalid crypto cipher : ", __FUNCTION__,
_ctx->algo->name);
assert (0);
}
ctx->key_index = vnet_crypto_key_add (vm, algo,
(u8 *) key, _ctx->algo->key_size);
return 0;
}
size_t
ptls_vpp_crypto_aead_decrypt (ptls_aead_context_t * _ctx, void *_output,
const void *input, size_t inlen, const void *iv,
const void *aad, size_t aadlen)
{
vlib_main_t *vm = vlib_get_main ();
struct vpp_aead_context_t *ctx = (struct vpp_aead_context_t *) _ctx;
int tag_size = ctx->super.algo->tag_size;
ctx->op.dst = _output;
ctx->op.src = (void *) input;
ctx->op.len = inlen - tag_size;;
ctx->op.iv = (void *) iv;
ctx->op.aad = (void *) aad;
ctx->op.aad_len = aadlen;
ctx->op.tag = (void *) input + inlen - tag_size;
ctx->op.tag_len = tag_size;
vnet_crypto_process_ops (vm, &(ctx->op), 1);
assert (ctx->op.status == VNET_CRYPTO_OP_STATUS_COMPLETED);
return inlen - tag_size;
}
static void
ptls_vpp_crypto_aead_encrypt_init (ptls_aead_context_t * _ctx, const void *iv,
const void *aad, size_t aadlen)
{
struct vpp_aead_context_t *ctx = (struct vpp_aead_context_t *) _ctx;
ctx->op.iv = (void *) iv;
ctx->op.aad = (void *) aad;
ctx->op.aad_len = aadlen;
ctx->op.n_chunks = 2;
ctx->op.chunk_index = 0;
ctx->op.flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
}
static size_t
ptls_vpp_crypto_aead_encrypt_update (ptls_aead_context_t * _ctx, void *output,
const void *input, size_t inlen)
{
struct vpp_aead_context_t *ctx = (struct vpp_aead_context_t *) _ctx;
ctx->chunks[ctx->chunk_index].dst = output;
ctx->chunks[ctx->chunk_index].src = (void *) input;
ctx->chunks[ctx->chunk_index].len = inlen;
ctx->chunk_index = ctx->chunk_index == 0 ? 1 : 0;
return inlen;
}
static size_t
ptls_vpp_crypto_aead_encrypt_final (ptls_aead_context_t * _ctx, void *_output)
{
struct vlib_main_t *vm = vlib_get_main ();
struct vpp_aead_context_t *ctx = (struct vpp_aead_context_t *) _ctx;
ctx->op.tag = _output;
ctx->op.tag_len = ctx->super.algo->tag_size;
vnet_crypto_process_chained_ops (vm, &(ctx->op), ctx->chunks, 1);
assert (ctx->op.status == VNET_CRYPTO_OP_STATUS_COMPLETED);
return ctx->super.algo->tag_size;
}
static void
ptls_vpp_crypto_aead_dispose_crypto (ptls_aead_context_t * _ctx)
{
/* Do nothing */
}
static int
ptls_vpp_crypto_aead_setup_crypto (ptls_aead_context_t * _ctx, int is_enc,
const void *key, vnet_crypto_alg_t alg)
{
struct vlib_main_t *vm = vlib_get_main ();
struct vpp_aead_context_t *ctx = (struct vpp_aead_context_t *) _ctx;
u16 key_len = ctx->super.algo->key_size;
memset (&(ctx->op), 0, sizeof (vnet_crypto_op_t));
if (alg == VNET_CRYPTO_ALG_AES_128_GCM)
{
if (is_enc)
vnet_crypto_op_init (&(ctx->op), VNET_CRYPTO_OP_AES_128_GCM_ENC);
else
vnet_crypto_op_init (&(ctx->op), VNET_CRYPTO_OP_AES_128_GCM_DEC);
}
else if (alg == VNET_CRYPTO_ALG_AES_256_GCM)
{
if (is_enc)
{
vnet_crypto_op_init (&(ctx->op), VNET_CRYPTO_OP_AES_256_GCM_ENC);
}
else
vnet_crypto_op_init (&(ctx->op), VNET_CRYPTO_OP_AES_256_GCM_DEC);
}
else
{
TLS_DBG (1, "%s, invalied aead cipher %s", __FUNCTION__,
_ctx->algo->name);
return -1;
}
ctx->alg = alg;
ctx->op.key_index =
vnet_crypto_key_add (vm, ctx->alg, (void *) key, key_len);
ctx->chunk_index = 0;
ctx->super.do_decrypt = ptls_vpp_crypto_aead_decrypt;
ctx->super.do_encrypt_init = ptls_vpp_crypto_aead_encrypt_init;
ctx->super.do_encrypt_update = ptls_vpp_crypto_aead_encrypt_update;
ctx->super.do_encrypt_final = ptls_vpp_crypto_aead_encrypt_final;
ctx->super.dispose_crypto = ptls_vpp_crypto_aead_dispose_crypto;
return 0;
}
static int
ptls_vpp_crypto_aes128ctr_setup_crypto (ptls_cipher_context_t * ctx,
int is_enc, const void *key)
{
return ptls_vpp_crypto_cipher_setup_crypto (ctx, 1, key, EVP_aes_128_ctr (),
ptls_vpp_crypto_cipher_encrypt);
}
static int
ptls_vpp_crypto_aes256ctr_setup_crypto (ptls_cipher_context_t * ctx,
int is_enc, const void *key)
{
return ptls_vpp_crypto_cipher_setup_crypto (ctx, 1, key, EVP_aes_256_ctr (),
ptls_vpp_crypto_cipher_encrypt);
}
static int
ptls_vpp_crypto_aead_aes128gcm_setup_crypto (ptls_aead_context_t * ctx,
int is_enc, const void *key)
{
return ptls_vpp_crypto_aead_setup_crypto (ctx, is_enc, key,
VNET_CRYPTO_ALG_AES_128_GCM);
}
static int
ptls_vpp_crypto_aead_aes256gcm_setup_crypto (ptls_aead_context_t * ctx,
int is_enc, const void *key)
{
return ptls_vpp_crypto_aead_setup_crypto (ctx, is_enc, key,
VNET_CRYPTO_ALG_AES_256_GCM);
}
ptls_cipher_algorithm_t ptls_vpp_crypto_aes128ctr = { "AES128-CTR",
PTLS_AES128_KEY_SIZE,
1, PTLS_AES_IV_SIZE,
sizeof (struct vpp_aead_context_t),
ptls_vpp_crypto_aes128ctr_setup_crypto
};
ptls_cipher_algorithm_t ptls_vpp_crypto_aes256ctr = { "AES256-CTR",
PTLS_AES256_KEY_SIZE,
1 /* block size */ ,
PTLS_AES_IV_SIZE,
sizeof (struct vpp_aead_context_t),
ptls_vpp_crypto_aes256ctr_setup_crypto
};
ptls_aead_algorithm_t ptls_vpp_crypto_aes128gcm = { "AES128-GCM",
&ptls_vpp_crypto_aes128ctr,
NULL,
PTLS_AES128_KEY_SIZE,
PTLS_AESGCM_IV_SIZE,
PTLS_AESGCM_TAG_SIZE,
sizeof (struct vpp_aead_context_t),
ptls_vpp_crypto_aead_aes128gcm_setup_crypto
};
ptls_aead_algorithm_t ptls_vpp_crypto_aes256gcm = { "AES256-GCM",
&ptls_vpp_crypto_aes256ctr,
NULL,
PTLS_AES256_KEY_SIZE,
PTLS_AESGCM_IV_SIZE,
PTLS_AESGCM_TAG_SIZE,
sizeof (struct vpp_aead_context_t),
ptls_vpp_crypto_aead_aes256gcm_setup_crypto
};
ptls_cipher_suite_t ptls_vpp_crypto_aes128gcmsha256 =
{ PTLS_CIPHER_SUITE_AES_128_GCM_SHA256,
&ptls_vpp_crypto_aes128gcm,
&ptls_openssl_sha256
};
ptls_cipher_suite_t ptls_vpp_crypto_aes256gcmsha384 =
{ PTLS_CIPHER_SUITE_AES_256_GCM_SHA384,
&ptls_vpp_crypto_aes256gcm,
&ptls_openssl_sha384
};
ptls_cipher_suite_t *ptls_vpp_crypto_cipher_suites[] =
{ &ptls_vpp_crypto_aes256gcmsha384,
&ptls_vpp_crypto_aes128gcmsha256,
NULL
};
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
