/*
* 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/mdx_hash.h>

BOTAN_FUTURE_INTERNAL_HEADER(sha2_64.h)

namespace Botan {

/**
* SHA-384
*/
class BOTAN_PUBLIC_API(2,0) SHA_384 final : public MDx_HashFunction
   {
   public:
      std::string name() const override { return "SHA-384"; }
      size_t output_length() const override { return 48; }
      HashFunction* clone() const override { return new 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 BOTAN_PUBLIC_API(2,0) SHA_512 final : public MDx_HashFunction
   {
   public:
      std::string name() const override { return "SHA-512"; }
      size_t output_length() const override { return 64; }
      HashFunction* clone() const override { return new 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 BOTAN_PUBLIC_API(2,0) 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; }
      HashFunction* clone() const override { return new 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