ocrypto_aes_ctr.h

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/*
 * Copyright (c) 2016 - 2025 Nordic Semiconductor ASA
 * Copyright (c) since 2013 Oberon microsystems AG
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */
 
 
#ifndef OCRYPTO_AES_CTR_H
#define OCRYPTO_AES_CTR_H
 
#include <stddef.h>
#include <stdint.h>
 
 
#ifdef __cplusplus
extern "C" {
#endif
 
 
typedef struct {
    uint32_t xkey[60];
    uint8_t  counter[16];
    uint8_t  cipher[16];
    uint32_t position; // Current position in cipher.
    uint8_t  key_size; // Key size (16, 24, or 32 bytes).
} ocrypto_aes_ctr_ctx;
void ocrypto_aes_ctr_init(ocrypto_aes_ctr_ctx *ctx, const uint8_t *key, size_t size, const uint8_t iv[16]);
 
void ocrypto_aes_ctr_update(ocrypto_aes_ctr_ctx *ctx, uint8_t* ct, const uint8_t* pt, size_t pt_len);
void ocrypto_aes_ctr_encrypt(
    uint8_t* ct, const uint8_t* pt, size_t pt_len, const uint8_t *key, size_t size, const uint8_t iv[16]);
 
void ocrypto_aes_ctr_decrypt(
    uint8_t* pt, const uint8_t* ct, size_t ct_len, const uint8_t *key, size_t size, const uint8_t iv[16]);
 
 
#ifdef __cplusplus
}
#endif
 
#endif