/*
 * NORX reference source code package - reference C implementations
 *
 * Written 2014-2016 by:
 *
 *      - Samuel Neves <sneves@dei.uc.pt>
 *      - Philipp Jovanovic <philipp@jovanovic.io>
 *
 * To the extent possible under law, the author(s) have dedicated all copyright
 * and related and neighboring rights to this software to the public domain
 * worldwide. This software is distributed without any warranty.
 *
 * You should have received a copy of the CC0 Public Domain Dedication along with
 * this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
 */
#ifndef NORX_NORX_H
#define NORX_NORX_H

#include <stddef.h>
#include <stdint.h>
#include "norx_inexact_config.h"

#if   NORX_W == 64
	typedef uint64_t norx_word_t;
#elif NORX_W == 32
	typedef uint32_t norx_word_t;
#else
	#error "Invalid word size!"
#endif

typedef struct norx_state__
{
    norx_word_t S[16];
} norx_state_t[1];

typedef enum tag__
{
    HEADER_TAG  = 0x01,
    PAYLOAD_TAG = 0x02,
    TRAILER_TAG = 0x04,
    FINAL_TAG   = 0x08,
    BRANCH_TAG  = 0x10,
    MERGE_TAG   = 0x20
} tag_t;

/* High-level operations */
void norx_aead_encrypt(
        unsigned char *c, size_t *clen,
        const unsigned char *a, size_t alen,
        const unsigned char *m, size_t mlen,
        const unsigned char *z, size_t zlen,
        const unsigned char *nonce, 
        const unsigned char *key,
        size_t tlen);

int norx_aead_decrypt(
        unsigned char *m, size_t *mlen,
        const unsigned char *a, size_t alen,
        const unsigned char *c, size_t clen,
        const unsigned char *z, size_t zlen,
        const unsigned char *nonce,
        const unsigned char *key,
        size_t tlen);
#endif