kdf2.h

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/*
* KDF2
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
 
#ifndef BOTAN_KDF2_H_
#define BOTAN_KDF2_H_
 
#include <botan/hash.h>
#include <botan/kdf.h>
 
namespace Botan {
 
/**
* KDF2, from IEEE 1363
*/
class KDF2 final : public KDF {
   public:
      std::string name() const override;
 
      std::unique_ptr<KDF> new_object() const override;
 
      /**
      * @param hash the hash function to use
      */
      explicit KDF2(std::unique_ptr<HashFunction> hash) : m_hash(std::move(hash)) {}
 
   private:
      void perform_kdf(std::span<uint8_t> key,
                       std::span<const uint8_t> secret,
                       std::span<const uint8_t> salt,
                       std::span<const uint8_t> label) const override;
 
   private:
      std::unique_ptr<HashFunction> m_hash;
};
 
}  // namespace Botan
 
#endif