/*
* 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_DLL 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; }

      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_DLL 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; }

      void clear() override;

      SHA_256() : 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;
   };

#if defined(BOTAN_HAS_SHA2_32_X86)
/*
* SHA-256 compression using Goldmont x86 extensions. Not for public consumption.
*/
void sha2_compress_x86(uint32_t digest[8], const uint8_t input[], size_t blocks);
#endif

}

#endif