/*

* KDF1 from ISO 18033-2

* (C) 2016 Philipp Weber

*

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

*/

#ifndef BOTAN_KDF1_18033_H_

#define BOTAN_KDF1_18033_H_

#include <botan/kdf.h>

#include <botan/hash.h>

BOTAN_FUTURE_INTERNAL_HEADER(kdf1_iso18033.h)

namespace Botan {

/**

* KDF1, from ISO 18033-2

*/

class BOTAN_PUBLIC_API(2,0) KDF1_18033 final : public KDF

   {

   public:

      std::string name() const override { return "KDF1-18033(" + m_hash->name() + ")"; }

      KDF* clone() const override { return new KDF1_18033(m_hash->clone()); }

      size_t kdf(uint8_t key[], size_t key_len,

                 const uint8_t secret[], size_t secret_len,

                 const uint8_t salt[], size_t salt_len,

                 const uint8_t label[], size_t label_len) const override;

      /**

      * @param h hash function to use

      */

      explicit KDF1_18033(HashFunction* h) : m_hash(h) {}

   private:

      std::unique_ptr<HashFunction> m_hash;

   };

}

#endif