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

#include "../common/common.h"
#include "../common/cpu.h"

#ifndef HAS_HW_AES

#    include "../common/softaes.h"
#    include "aegis256x2.h"
#    include "aegis256x2_soft.h"

#    define AES_BLOCK_LENGTH 32

typedef struct {
    SoftAesBlock b0;
    SoftAesBlock b1;
} aes_block_t;

static inline aes_block_t
AES_BLOCK_XOR(const aes_block_t a, const aes_block_t b)
{
    return (aes_block_t) { softaes_block_xor(a.b0, b.b0), softaes_block_xor(a.b1, b.b1) };
}

static inline aes_block_t
AES_BLOCK_AND(const aes_block_t a, const aes_block_t b)
{
    return (aes_block_t) { softaes_block_and(a.b0, b.b0), softaes_block_and(a.b1, b.b1) };
}

static inline aes_block_t
AES_BLOCK_LOAD(const uint8_t *a)
{
    return (aes_block_t) { softaes_block_load(a), softaes_block_load(a + 16) };
}

static inline aes_block_t
AES_BLOCK_LOAD_64x2(uint64_t a, uint64_t b)
{
    const SoftAesBlock t = softaes_block_load64x2(a, b);
    return (aes_block_t) { t, t };
}
static inline void
AES_BLOCK_STORE(uint8_t *a, const aes_block_t b)
{
    softaes_block_store(a, b.b0);
    softaes_block_store(a + 16, b.b1);
}

static inline aes_block_t
AES_ENC(const aes_block_t a, const aes_block_t b)
{
    return (aes_block_t) { softaes_block_encrypt(a.b0, b.b0), softaes_block_encrypt(a.b1, b.b1) };
}

static inline void
aegis256x2_update(aes_block_t *const state, const aes_block_t d)
{
    aes_block_t tmp;

    tmp      = state[5];
    state[5] = AES_ENC(state[4], state[5]);
    state[4] = AES_ENC(state[3], state[4]);
    state[3] = AES_ENC(state[2], state[3]);
    state[2] = AES_ENC(state[1], state[2]);
    state[1] = AES_ENC(state[0], state[1]);
    state[0] = AES_BLOCK_XOR(AES_ENC(tmp, state[0]), d);
}

#    include "aegis256x2_common.h"

struct aegis256x2_implementation aegis256x2_soft_implementation = {
    .encrypt_detached              = encrypt_detached,
    .decrypt_detached              = decrypt_detached,
    .encrypt_unauthenticated       = encrypt_unauthenticated,
    .decrypt_unauthenticated       = decrypt_unauthenticated,
    .stream                        = stream,
    .state_init                    = state_init,
    .state_encrypt_update          = state_encrypt_update,
    .state_encrypt_detached_final  = state_encrypt_detached_final,
    .state_encrypt_final           = state_encrypt_final,
    .state_decrypt_detached_update = state_decrypt_detached_update,
    .state_decrypt_detached_final  = state_decrypt_detached_final,
    .state_mac_init                = state_mac_init,
    .state_mac_update              = state_mac_update,
    .state_mac_final               = state_mac_final,
    .state_mac_reset               = state_mac_reset,
    .state_mac_clone               = state_mac_clone,
};

#endif
