/*

* SHA-{384,512}

* (C) 1999-2010,2015 Jack Lloyd

*

* Botan is released under the Simplified BSD License (see license.txt)

*/

#ifndef BOTAN_SHA_64BIT_H_

#define BOTAN_SHA_64BIT_H_

#include <botan/internal/mdx_hash.h>

namespace Botan {

/**

* SHA-384

*/

class SHA_384 final : public MDx_HashFunction

   {

   public:

      std::string name() const override { return "SHA-384"; }

      size_t output_length() const override { return 48; }

      std::unique_ptr<HashFunction> new_object() const override { return std::make_unique<SHA_384>(); }

      std::unique_ptr<HashFunction> copy_state() const override;

      std::string provider() const override;

      void clear() override;

      SHA_384() : MDx_HashFunction(128, true, true, 16), m_digest(8)

         { clear(); }

   private:

      void compress_n(const uint8_t[], size_t blocks) override;

      void copy_out(uint8_t[]) override;

      secure_vector<uint64_t> m_digest;

   };

/**

* SHA-512

*/

class SHA_512 final : public MDx_HashFunction

   {

   public:

      std::string name() const override { return "SHA-512"; }

      size_t output_length() const override { return 64; }

      std::unique_ptr<HashFunction> new_object() const override { return std::make_unique<SHA_512>(); }

      std::unique_ptr<HashFunction> copy_state() const override;

      std::string provider() const override;

      void clear() override;

      /*

      * Perform a SHA-512 compression. For internal use

      */

      static void compress_digest(secure_vector<uint64_t>& digest,

                                  const uint8_t input[],

                                  size_t blocks);

      SHA_512() : MDx_HashFunction(128, true, true, 16), m_digest(8)

         { clear(); }

   private:

      void compress_n(const uint8_t[], size_t blocks) override;

      void copy_out(uint8_t[]) override;

      static const uint64_t K[80];

#if defined(BOTAN_HAS_SHA2_64_BMI2)

      static void compress_digest_bmi2(secure_vector<uint64_t>& digest,

                                       const uint8_t input[],

                                       size_t blocks);

#endif

      secure_vector<uint64_t> m_digest;

   };

/**

* SHA-512/256

*/

class SHA_512_256 final : public MDx_HashFunction

   {

   public:

      std::string name() const override { return "SHA-512-256"; }

      size_t output_length() const override { return 32; }

      std::unique_ptr<HashFunction> new_object() const override { return std::make_unique<SHA_512_256>(); }

      std::unique_ptr<HashFunction> copy_state() const override;

      std::string provider() const override;

      void clear() override;

      SHA_512_256() : MDx_HashFunction(128, true, true, 16), m_digest(8) { clear(); }

   private:

      void compress_n(const uint8_t[], size_t blocks) override;

      void copy_out(uint8_t[]) override;

      secure_vector<uint64_t> m_digest;

   };

}

#endif