aead.h

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/*
 * Copyright (C) 2022 Southern Storm Software, Pty Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
 
#ifndef ASCON_AEAD_H
#define ASCON_AEAD_H
 
#include <ascon/permutation.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define ASCON128_KEY_SIZE 16
 
#define ASCON128_NONCE_SIZE 16
 
#define ASCON128_TAG_SIZE 16
 
#define ASCON80PQ_KEY_SIZE 20
 
#define ASCON80PQ_NONCE_SIZE 16
 
#define ASCON80PQ_TAG_SIZE 16
 
#define ASCON128_RATE 8
 
#define ASCON128A_RATE 16
 
#define ASCON80PQ_RATE 8
 
void ascon128_aead_encrypt
    (unsigned char *c, size_t *clen,
     const unsigned char *m, size_t mlen,
     const unsigned char *ad, size_t adlen,
     const unsigned char *npub,
     const unsigned char *k);
 
int ascon128_aead_decrypt
    (unsigned char *m, size_t *mlen,
     const unsigned char *c, size_t clen,
     const unsigned char *ad, size_t adlen,
     const unsigned char *npub,
     const unsigned char *k);
 
void ascon128a_aead_encrypt
    (unsigned char *c, size_t *clen,
     const unsigned char *m, size_t mlen,
     const unsigned char *ad, size_t adlen,
     const unsigned char *npub,
     const unsigned char *k);
 
int ascon128a_aead_decrypt
    (unsigned char *m, size_t *mlen,
     const unsigned char *c, size_t clen,
     const unsigned char *ad, size_t adlen,
     const unsigned char *npub,
     const unsigned char *k);
 
void ascon80pq_aead_encrypt
    (unsigned char *c, size_t *clen,
     const unsigned char *m, size_t mlen,
     const unsigned char *ad, size_t adlen,
     const unsigned char *npub,
     const unsigned char *k);
 
int ascon80pq_aead_decrypt
    (unsigned char *m, size_t *mlen,
     const unsigned char *c, size_t clen,
     const unsigned char *ad, size_t adlen,
     const unsigned char *npub,
     const unsigned char *k);
 
/* ---------------------------------------------------------------- */
/*            Incremental API's for the AEAD modes below            */
/* ---------------------------------------------------------------- */
 
typedef struct
{
    ascon_state_t state;
 
    unsigned char key[ASCON128_KEY_SIZE];
 
    unsigned char posn;
 
} ascon128_state_t;
 
typedef struct
{
    ascon_state_t state;
 
    unsigned char key[ASCON128_KEY_SIZE];
 
    unsigned char posn;
 
} ascon128a_state_t;
 
typedef struct
{
    ascon_state_t state;
 
    unsigned char key[ASCON80PQ_KEY_SIZE];
 
    unsigned char posn;
 
} ascon80pq_state_t;
 
void ascon128_aead_start
    (ascon128_state_t *state, const unsigned char *ad, size_t adlen,
     const unsigned char *npub, const unsigned char *k);
 
void ascon128_aead_abort(ascon128_state_t *state);
 
void ascon128_aead_encrypt_block
    (ascon128_state_t *state, const unsigned char *in,
     unsigned char *out, size_t len);
 
void ascon128_aead_encrypt_finalize
    (ascon128_state_t *state, unsigned char *tag);
 
void ascon128_aead_decrypt_block
    (ascon128_state_t *state, const unsigned char *in,
     unsigned char *out, size_t len);
 
int ascon128_aead_decrypt_finalize
    (ascon128_state_t *state, const unsigned char *tag);
 
void ascon128a_aead_start
    (ascon128a_state_t *state, const unsigned char *ad, size_t adlen,
     const unsigned char *npub, const unsigned char *k);
 
void ascon128a_aead_abort(ascon128a_state_t *state);
 
void ascon128a_aead_encrypt_block
    (ascon128a_state_t *state, const unsigned char *in,
     unsigned char *out, size_t len);
 
void ascon128a_aead_encrypt_finalize
    (ascon128a_state_t *state, unsigned char *tag);
 
void ascon128a_aead_decrypt_block
    (ascon128a_state_t *state, const unsigned char *in,
     unsigned char *out, size_t len);
 
int ascon128a_aead_decrypt_finalize
    (ascon128a_state_t *state, const unsigned char *tag);
 
void ascon80pq_aead_start
    (ascon80pq_state_t *state, const unsigned char *ad, size_t adlen,
     const unsigned char *npub, const unsigned char *k);
 
void ascon80pq_aead_abort(ascon80pq_state_t *state);
 
void ascon80pq_aead_encrypt_block
    (ascon80pq_state_t *state, const unsigned char *in,
     unsigned char *out, size_t len);
 
void ascon80pq_aead_encrypt_finalize
    (ascon80pq_state_t *state, unsigned char *tag);
 
void ascon80pq_aead_decrypt_block
    (ascon80pq_state_t *state, const unsigned char *in,
     unsigned char *out, size_t len);
 
int ascon80pq_aead_decrypt_finalize
    (ascon80pq_state_t *state, const unsigned char *tag);
 
#ifdef __cplusplus
}
#endif
 
#endif