hash.h

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/*
 * Copyright (C) 2023 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_HASH_H
#define ASCON_HASH_H
 
#include <ascon/xof.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef struct
{
    ascon_xof_state_t xof;  
} ascon_hash_state_t;
 
typedef struct
{
    ascon_xofa_state_t xof; 
} ascon_hasha_state_t;
 
void ascon_hash(unsigned char *out, const unsigned char *in, size_t inlen);
 
void ascon_hash_init(ascon_hash_state_t *state);
 
void ascon_hash_reinit(ascon_hash_state_t *state);
 
void ascon_hash_free(ascon_hash_state_t *state);
 
void ascon_hash_update
    (ascon_hash_state_t *state, const unsigned char *in, size_t inlen);
 
void ascon_hash_finalize(ascon_hash_state_t *state, unsigned char *out);
 
void ascon_hash_copy
    (ascon_hash_state_t *dest, const ascon_hash_state_t *src);
 
void ascon_hasha(unsigned char *out, const unsigned char *in, size_t inlen);
 
void ascon_hasha_init(ascon_hasha_state_t *state);
 
void ascon_hasha_reinit(ascon_hasha_state_t *state);
 
void ascon_hasha_free(ascon_hasha_state_t *state);
 
void ascon_hasha_update
    (ascon_hasha_state_t *state, const unsigned char *in, size_t inlen);
 
void ascon_hasha_finalize(ascon_hasha_state_t *state, unsigned char *out);
 
void ascon_hasha_copy
    (ascon_hasha_state_t *dest, const ascon_hasha_state_t *src);
 
#ifdef __cplusplus
} /* extern "C" */
 
namespace ascon
{
 
class hash
{
public:
    inline hash()
    {
        ::ascon_hash_init(&m_state);
    }
 
    inline hash(const ascon::hash &other)
    {
        ::ascon_hash_copy(&m_state, &other.m_state);
    }
 
    inline ~hash()
    {
        ::ascon_hash_free(&m_state);
    }
 
    inline hash &operator=(const ascon::hash &other)
    {
        if (this != &other) {
            ::ascon_hash_free(&m_state);
            ::ascon_hash_copy(&m_state, &other.m_state);
        }
        return *this;
    }
 
    inline void reset()
    {
        ::ascon_hash_reinit(&m_state);
    }
 
    inline void update(const unsigned char *data, size_t len)
    {
        ::ascon_hash_update(&m_state, data, len);
    }
 
    inline void update(const char *str)
    {
        if (str) {
            ::ascon_hash_update
                (&m_state, reinterpret_cast<const unsigned char *>(str),
                 ::strlen(str));
        }
    }
 
    inline void update(const ascon::byte_array& data)
    {
        ::ascon_hash_update(&m_state, data.data(), data.size());
    }
 
    inline void finalize(unsigned char digest[ASCON_HASH_SIZE])
    {
        ::ascon_hash_finalize(&m_state, digest);
    }
 
    inline ascon::byte_array finalize()
    {
        ascon::byte_array vec(ASCON_HASH_SIZE);
        ::ascon_hash_finalize(&m_state, vec.data());
        return vec;
    }
 
    static inline void digest
        (unsigned char result[ASCON_HASH_SIZE],
         const unsigned char *data, size_t len)
    {
        ::ascon_hash(result, data, len);
    }
 
    inline ::ascon_hash_state_t *state() { return &m_state; }
 
    inline const ::ascon_hash_state_t *state() const { return &m_state; }
 
#if !defined(ARDUINO) && !defined(ASCON_NO_STL)
 
    inline void update(const std::string& str)
    {
        ::ascon_hash_update
            (&m_state, reinterpret_cast<const unsigned char *>(str.data()),
             str.size());
    }
 
#elif defined(ARDUINO)
 
    inline void update(const String& str)
    {
        ::ascon_hash_update
            (&m_state, reinterpret_cast<const unsigned char *>(str.c_str()),
             str.length());
    }
 
#endif /* ARDUINO */
 
private:
    ::ascon_hash_state_t m_state; 
};
 
class hasha
{
public:
    inline hasha()
    {
        ::ascon_hasha_init(&m_state);
    }
 
    inline hasha(const ascon::hasha &other)
    {
        ::ascon_hasha_copy(&m_state, &other.m_state);
    }
 
    inline ~hasha()
    {
        ::ascon_hasha_free(&m_state);
    }
 
    inline hasha &operator=(const ascon::hasha &other)
    {
        if (this != &other) {
            ::ascon_hasha_free(&m_state);
            ::ascon_hasha_copy(&m_state, &other.m_state);
        }
        return *this;
    }
 
    inline void reset()
    {
        ::ascon_hasha_reinit(&m_state);
    }
 
    inline void update(const unsigned char *data, size_t len)
    {
        ::ascon_hasha_update(&m_state, data, len);
    }
 
    inline void update(const char *str)
    {
        if (str) {
            ::ascon_hasha_update
                (&m_state, reinterpret_cast<const unsigned char *>(str),
                 ::strlen(str));
        }
    }
 
    inline void update(const ascon::byte_array& data)
    {
        ::ascon_hasha_update(&m_state, data.data(), data.size());
    }
 
    inline void finalize(unsigned char digest[ASCON_HASHA_SIZE])
    {
        ::ascon_hasha_finalize(&m_state, digest);
    }
 
    inline ascon::byte_array finalize()
    {
        ascon::byte_array vec(ASCON_HASHA_SIZE);
        ::ascon_hasha_finalize(&m_state, vec.data());
        return vec;
    }
 
    static inline void digest
        (unsigned char result[ASCON_HASH_SIZE],
         const unsigned char *data, size_t len)
    {
        ::ascon_hasha(result, data, len);
    }
 
    inline ::ascon_hasha_state_t *state() { return &m_state; }
 
    inline const ::ascon_hasha_state_t *state() const { return &m_state; }
 
#if !defined(ARDUINO) && !defined(ASCON_NO_STL)
 
    inline void update(const std::string& str)
    {
        ::ascon_hasha_update
            (&m_state, reinterpret_cast<const unsigned char *>(str.data()),
             str.size());
    }
 
#elif defined(ARDUINO)
 
    inline void update(const String& str)
    {
        ::ascon_hasha_update
            (&m_state, reinterpret_cast<const unsigned char *>(str.c_str()),
             str.length());
    }
 
#endif /* ARDUINO */
 
private:
    ::ascon_hasha_state_t m_state; 
};
 
} /* namespace ascon */
 
#endif /* __cplusplus */
 
#endif