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/*
* SHA-3
* (C) 2010,2016 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_SHA3_H__
#define BOTAN_SHA3_H__
#include <botan/hash.h>
#include <botan/secmem.h>
#include <string>
namespace Botan {
/**
* SHA-3
*/
class BOTAN_DLL SHA_3 : public HashFunction
{
public:
/**
* @param output_bits the size of the hash output; must be one of
* 224, 256, 384, or 512
*/
SHA_3(size_t output_bits);
/**
* @param output_bits the size of the hash output; must be a
* multiple of 8 (ie, byte-wide outputs)
* @param capacity the capacity of the spong, normally always
* 2*output_bits with SHA-3.
*/
SHA_3(size_t output_bits, size_t capacity);
size_t hash_block_size() const override { return m_bitrate / 8; }
size_t output_length() const override { return m_output_bits / 8; }
HashFunction* clone() const override;
std::string name() const override;
void clear() override;
/**
* The bare Keccak-1600 permutation
*/
static void permute(u64bit A[25]);
private:
void add_data(const byte input[], size_t length) override;
void final_result(byte out[]) override;
size_t m_output_bits, m_bitrate;
secure_vector<u64bit> m_S;
size_t m_S_pos;
};
/**
* SHA-3-224
*/
class BOTAN_DLL SHA_3_224 final : public SHA_3
{
public:
SHA_3_224() : SHA_3(224) {}
};
/**
* SHA-3-256
*/
class BOTAN_DLL SHA_3_256 final : public SHA_3
{
public:
SHA_3_256() : SHA_3(256) {}
};
/**
* SHA-3-384
*/
class BOTAN_DLL SHA_3_384 final : public SHA_3
{
public:
SHA_3_384() : SHA_3(384) {}
};
/**
* SHA-3-512
*/
class BOTAN_DLL SHA_3_512 final : public SHA_3
{
public:
SHA_3_512() : SHA_3(512) {}
};
}
#endif
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