eme1.h

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/*
* EME1
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
 
#ifndef BOTAN_EME1_H__
#define BOTAN_EME1_H__
 
#include <botan/eme.h>
#include <botan/kdf.h>
#include <botan/hash.h>
 
namespace Botan {
 
/**
* EME1, aka OAEP
*/
class BOTAN_DLL EME1 : public EME
   {
   public:
      size_t maximum_input_size(size_t) const;
 
      /**
      * @param hash object to use for hashing (takes ownership)
      * @param P an optional label. Normally empty.
      */
      EME1(HashFunction* hash, const std::string& P = "");
 
      ~EME1() { delete mgf; }
   private:
      SecureVector<byte> pad(const byte[], size_t, size_t,
                             RandomNumberGenerator&) const;
      SecureVector<byte> unpad(const byte[], size_t, size_t) const;
 
      SecureVector<byte> Phash;
      MGF* mgf;
   };
 
}
 
#endif