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/*
* SHA-{224,256}
* (C) 1999-2011 Jack Lloyd
* 2007 FlexSecure GmbH
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_SHA_224_256_H__
#define BOTAN_SHA_224_256_H__
#include <botan/mdx_hash.h>
namespace Botan {
/**
* SHA-224
*/
class BOTAN_PUBLIC_API(2,0) SHA_224 final : public MDx_HashFunction
{
public:
std::string name() const override { return "SHA-224"; }
size_t output_length() const override { return 28; }
HashFunction* clone() const override { return new SHA_224; }
std::unique_ptr<HashFunction> copy_state() const override;
void clear() override;
SHA_224() : MDx_HashFunction(64, true, true), m_digest(8)
{ clear(); }
private:
void compress_n(const uint8_t[], size_t blocks) override;
void copy_out(uint8_t[]) override;
secure_vector<uint32_t> m_digest;
};
/**
* SHA-256
*/
class BOTAN_PUBLIC_API(2,0) SHA_256 final : public MDx_HashFunction
{
public:
std::string name() const override { return "SHA-256"; }
size_t output_length() const override { return 32; }
HashFunction* clone() const override { return new SHA_256; }
std::unique_ptr<HashFunction> copy_state() const override;
void clear() override;
SHA_256() : MDx_HashFunction(64, true, true), m_digest(8)
{ clear(); }
/*
* Perform a SHA-256 compression. For internal use
*/
static void compress_digest(secure_vector<uint32_t>& digest,
const uint8_t input[],
size_t blocks);
private:
#if defined(BOTAN_HAS_SHA2_32_ARMV8)
static void compress_digest_armv8(secure_vector<uint32_t>& digest,
const uint8_t input[],
size_t blocks);
#endif
#if defined(BOTAN_HAS_SHA2_32_X86)
static void compress_digest_x86(secure_vector<uint32_t>& digest,
const uint8_t input[],
size_t blocks);
#endif
void compress_n(const uint8_t[], size_t blocks) override;
void copy_out(uint8_t[]) override;
secure_vector<uint32_t> m_digest;
};
}
#endif
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