ocrypto_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_POLY1305_H
#define OCRYPTO_POLY1305_H
 
#include <stddef.h>
#include <stdint.h>
 
 
#ifdef __cplusplus
extern "C" {
#endif
 
 
#define ocrypto_poly1305_KEY_BYTES (32)
 
#define ocrypto_poly1305_BYTES (16)
 
 
typedef struct {
    uint32_t h[5];
    uint32_t r[4];
    uint32_t c[4];
    uint8_t  buffer[16];
    uint8_t  length;   // Data length in buffer.
} ocrypto_poly1305_ctx;
void ocrypto_poly1305_init(
    ocrypto_poly1305_ctx *ctx,
    const uint8_t key[ocrypto_poly1305_KEY_BYTES]);
 
void ocrypto_poly1305_update(
    ocrypto_poly1305_ctx *ctx,
    const uint8_t *in, size_t in_len);
 
void ocrypto_poly1305_pad(
    ocrypto_poly1305_ctx *ctx);
 
void ocrypto_poly1305_final(
    ocrypto_poly1305_ctx *ctx,
    uint8_t r[ocrypto_poly1305_BYTES]);
void ocrypto_poly1305(
    uint8_t r[ocrypto_poly1305_BYTES],
    const uint8_t *in, size_t in_len,
    const uint8_t k[ocrypto_poly1305_KEY_BYTES]);
 
#ifdef __cplusplus
}
#endif
 
#endif