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/* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0"
*
* Written by Nir Drucker and Shay Gueron
* AWS Cryptographic Algorithms Group.
* (ndrucker@amazon.com, gueron@amazon.com)
*/
#pragma once
#include "aes_wrap.h"
//////////////////////////////
// Types
/////////////////////////////
typedef struct aes_ctr_prf_state_s
{
uint128_t ctr;
uint128_t buffer;
aes256_ks_t ks_ptr;
uint32_t rem_invokations;
uint8_t pos;
} aes_ctr_prf_state_t;
//////////////////////////////
// Methods
/////////////////////////////
ret_t
init_aes_ctr_prf_state(OUT aes_ctr_prf_state_t *s,
IN uint32_t max_invokations,
IN const seed_t *seed);
ret_t
aes_ctr_prf(OUT uint8_t *a, IN OUT aes_ctr_prf_state_t *s, IN uint32_t len);
_INLINE_ void
finalize_aes_ctr_prf(IN OUT aes_ctr_prf_state_t *s)
{
aes256_free_ks(&s->ks_ptr);
secure_clean((uint8_t *)s, sizeof(*s));
}
_INLINE_ void
aes_ctr_prf_state_cleanup(IN OUT aes_ctr_prf_state_t *s)
{
finalize_aes_ctr_prf(s);
}
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