ocrypto_chacha20_poly1305.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_CHACHA20_POLY1305_INC_H
#define OCRYPTO_CHACHA20_POLY1305_INC_H
 
#include <stdint.h>
#include <stddef.h>
#include "ocrypto_chacha20.h"
#include "ocrypto_poly1305.h"
 
 
#ifdef __cplusplus
extern "C" {
#endif
 
 
#define ocrypto_chacha20_poly1305_KEY_BYTES (32)
 
#define ocrypto_chacha20_poly1305_NONCE_BYTES_MAX (12)
 
#define ocrypto_chacha20_poly1305_TAG_BYTES (16)
 
 
typedef struct {
    ocrypto_chacha20_ctx enc_ctx;
    ocrypto_poly1305_ctx auth_ctx;
    size_t msg_len;
    size_t aad_len;
} ocrypto_chacha20_poly1305_ctx;
void ocrypto_chacha20_poly1305_init(
    ocrypto_chacha20_poly1305_ctx *ctx,
    const uint8_t *n, size_t n_len,
    const uint8_t k[ocrypto_chacha20_poly1305_KEY_BYTES]);
 
void ocrypto_chacha20_poly1305_update_aad(
    ocrypto_chacha20_poly1305_ctx *ctx,
    const uint8_t *a, size_t a_len);
 
void ocrypto_chacha20_poly1305_update_enc(
    ocrypto_chacha20_poly1305_ctx *ctx,
    uint8_t *c,
    const uint8_t *m, size_t m_len);
 
void ocrypto_chacha20_poly1305_update_dec(
    ocrypto_chacha20_poly1305_ctx *ctx,
    uint8_t *m,
    const uint8_t *c, size_t c_len);
 
void ocrypto_chacha20_poly1305_final_enc(
    ocrypto_chacha20_poly1305_ctx *ctx,
    uint8_t tag[ocrypto_chacha20_poly1305_TAG_BYTES]);
 
int ocrypto_chacha20_poly1305_final_dec(
    ocrypto_chacha20_poly1305_ctx *ctx,
    const uint8_t tag[ocrypto_chacha20_poly1305_TAG_BYTES]);
void ocrypto_chacha20_poly1305_encrypt(
    uint8_t tag[ocrypto_chacha20_poly1305_TAG_BYTES],
    uint8_t *c,
    const uint8_t *m, size_t m_len,
    const uint8_t *a, size_t a_len,
    const uint8_t *n, size_t n_len,
    const uint8_t k[ocrypto_chacha20_poly1305_KEY_BYTES]);
 
int ocrypto_chacha20_poly1305_decrypt(
    const uint8_t tag[ocrypto_chacha20_poly1305_TAG_BYTES],
    uint8_t *m,
    const uint8_t *c, size_t c_len,
    const uint8_t *a, size_t a_len,
    const uint8_t *n, size_t n_len,
    const uint8_t k[ocrypto_chacha20_poly1305_KEY_BYTES]);
 
#ifdef __cplusplus
}
#endif
 
#endif