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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 "tls/s2n_connection_evp_digests.h"
#include "utils/s2n_safety.h"
/* On s2n_connection_wipe, save all pointers to OpenSSL EVP digest structs in a temporary
* s2n_connection_hmac_handles struct to avoid re-allocation after zeroing the connection struct.
* Do not store any additional HMAC state as it is unnecessary and excessive copying would impact performance.
*/
int s2n_connection_save_hmac_state(struct s2n_connection_hmac_handles *hmac_handles, struct s2n_connection *conn)
{
POSIX_GUARD(s2n_hmac_save_evp_hash_state(&hmac_handles->initial_client, &conn->initial.client_record_mac));
POSIX_GUARD(s2n_hmac_save_evp_hash_state(&hmac_handles->initial_server, &conn->initial.server_record_mac));
POSIX_GUARD(s2n_hmac_save_evp_hash_state(&hmac_handles->secure_client, &conn->secure.client_record_mac));
POSIX_GUARD(s2n_hmac_save_evp_hash_state(&hmac_handles->secure_server, &conn->secure.server_record_mac));
return 0;
}
/* On s2n_connection_wipe, restore all pointers to OpenSSL EVP digest structs after zeroing the connection struct
* to avoid re-allocation. Do not store any additional HMAC state as it is unnecessary and excessive copying
* would impact performance.
*/
int s2n_connection_restore_hmac_state(struct s2n_connection *conn, struct s2n_connection_hmac_handles *hmac_handles)
{
POSIX_GUARD(s2n_hmac_restore_evp_hash_state(&hmac_handles->initial_client, &conn->initial.client_record_mac));
POSIX_GUARD(s2n_hmac_restore_evp_hash_state(&hmac_handles->initial_server, &conn->initial.server_record_mac));
POSIX_GUARD(s2n_hmac_restore_evp_hash_state(&hmac_handles->secure_client, &conn->secure.client_record_mac));
POSIX_GUARD(s2n_hmac_restore_evp_hash_state(&hmac_handles->secure_server, &conn->secure.server_record_mac));
return 0;
}
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