sm4.h

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/*
* SM4
* (C) 2017 Ribose Inc
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
 
#ifndef BOTAN_SM4_H_
#define BOTAN_SM4_H_
 
#include <botan/block_cipher.h>
 
namespace Botan {
 
/**
* SM4
*/
class SM4 final : public Block_Cipher_Fixed_Params<16, 16> {
   public:
      void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
      void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
 
      void clear() override;
 
      std::string name() const override { return "SM4"; }
 
      std::unique_ptr<BlockCipher> new_object() const override { return std::make_unique<SM4>(); }
 
      std::string provider() const override;
      size_t parallelism() const override;
      bool has_keying_material() const override;
 
   private:
      void key_schedule(std::span<const uint8_t> key) override;
 
#if defined(BOTAN_HAS_SM4_ARMV8)
      void sm4_armv8_encrypt(const uint8_t in[], uint8_t out[], size_t blocks) const;
      void sm4_armv8_decrypt(const uint8_t in[], uint8_t out[], size_t blocks) const;
#endif
 
#if defined(BOTAN_HAS_SM4_GFNI)
      void sm4_gfni_encrypt(const uint8_t in[], uint8_t out[], size_t blocks) const;
      void sm4_gfni_decrypt(const uint8_t in[], uint8_t out[], size_t blocks) const;
#endif
 
      secure_vector<uint32_t> m_RK;
};
 
}  // namespace Botan
 
#endif