/* BSD 2-Clause License */

/* Copyright (c) 2020, Frank Denis */
/* All rights reserved. */

/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions are met: */

/* * Redistributions of source code must retain the above copyright notice, this */
/*   list of conditions and the following disclaimer. */

/* * Redistributions in binary form must reproduce the above copyright notice, */
/*   this list of conditions and the following disclaimer in the documentation */
/*   and/or other materials provided with the distribution. */

/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" */
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#ifndef crypto_aead_det_xchacha20_H
#define crypto_aead_det_xchacha20_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdlib.h>

#define crypto_aead_det_xchacha20_KEYBYTES 32
#define crypto_aead_det_xchacha20_ABYTES 32
#define crypto_aead_det_xchacha20_NONCEBYTES 16

int crypto_aead_det_xchacha20_encrypt_detached(
    unsigned char *c, unsigned char mac[crypto_aead_det_xchacha20_ABYTES], const unsigned char *m,
    size_t mlen, const unsigned char *ad, size_t adlen, const unsigned char *nonce,
    const unsigned char k[crypto_aead_det_xchacha20_KEYBYTES]);

int crypto_aead_det_xchacha20_decrypt_detached(
    unsigned char *m, const unsigned char *c, size_t clen,
    const unsigned char mac[crypto_aead_det_xchacha20_ABYTES], const unsigned char *ad,
    size_t adlen, const unsigned char *nonce,
    const unsigned char k[crypto_aead_det_xchacha20_KEYBYTES]);

int crypto_aead_det_xchacha20_encrypt(unsigned char *c, const unsigned char *m, size_t mlen,
                                      const unsigned char *ad, size_t adlen,
                                      const unsigned char *nonce,
                                      const unsigned char  k[crypto_aead_det_xchacha20_KEYBYTES]);

int crypto_aead_det_xchacha20_decrypt(unsigned char *m, const unsigned char *c, size_t clen,
                                      const unsigned char *ad, size_t adlen,
                                      const unsigned char *nonce,
                                      const unsigned char  k[crypto_aead_det_xchacha20_KEYBYTES]);

void crypto_aead_det_xchacha20_keygen(unsigned char k[crypto_aead_det_xchacha20_KEYBYTES]);

#ifdef __cplusplus
}
#endif

#endif