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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 "error/s2n_errno.h"
#include "crypto/s2n_cipher.h"
#include "utils/s2n_safety.h"
#include "utils/s2n_blob.h"
static uint8_t s2n_stream_cipher_null_available()
{
return 1;
}
static int s2n_stream_cipher_null_endecrypt(struct s2n_session_key *key, struct s2n_blob *in, struct s2n_blob *out)
{
S2N_ERROR_IF(out->size < in->size, S2N_ERR_SIZE_MISMATCH);
if (in->data != out->data) {
memcpy_check(out->data, in->data, out->size);
}
return 0;
}
static int s2n_stream_cipher_null_get_key(struct s2n_session_key *key, struct s2n_blob *in)
{
return 0;
}
static int s2n_stream_cipher_null_destroy_key(struct s2n_session_key *key)
{
return 0;
}
static int s2n_stream_cipher_null_init(struct s2n_session_key *key)
{
return 0;
}
struct s2n_cipher s2n_null_cipher = {
.type = S2N_STREAM,
.key_material_size = 0,
.io.stream = {
.decrypt = s2n_stream_cipher_null_endecrypt,
.encrypt = s2n_stream_cipher_null_endecrypt},
.is_available = s2n_stream_cipher_null_available,
.init = s2n_stream_cipher_null_init,
.set_encryption_key = s2n_stream_cipher_null_get_key,
.set_decryption_key = s2n_stream_cipher_null_get_key,
.destroy_key = s2n_stream_cipher_null_destroy_key,
};
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