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TranslationCertificate.h

/*
 * Copyright 2003 Michael A. Marsh, Cornell University. All rights reserved.
 * This software is released under the modified BSD license.
 * See the file LICENSE in the top-level directory for details.
 */
//
// $Id: TranslationCertificate.h,v 1.3 2004/05/19 15:56:47 mmarsh Exp $
//
// $Log: TranslationCertificate.h,v $
// Revision 1.3  2004/05/19 15:56:47  mmarsh
// *** empty log message ***
//
// Revision 1.2  2003/11/04 22:31:48  mmarsh
// *** empty log message ***
//
//

#ifndef __CODEX_CIPHERS_TRANSLATIONCERTIFICATE_H__
#define __CODEX_CIPHERS_TRANSLATIONCERTIFICATE_H__

#include "ElGamal.h"
#include "HashFunction.h"

namespace CODEX_Ciphers
{
   class TranslationCertificate : public CODEX_ASN1::Base
   {
      public :
         TranslationCertificate();

         TranslationCertificate( const ElGamalPublicKey& pubKeyRecipient,
                                 const ElGamalPrivateKey& privKeyCreator,
                                 const CODEX_ASN1::BigNumber& h,
                                 const BIGNUM * k,
                                 const ElGamalCipherText& cipherTextCreator,
                                 const HashFunction& hashFunc );

         TranslationCertificate( const CODEX_ASN1::BigNumber& z1bar,
                                 const CODEX_ASN1::BigNumber& z2bar,
                                 const CODEX_ASN1::BigNumber& G,
                                 const CODEX_ASN1::BigNumber& H,
                                 const CODEX_ASN1::BigNumber& delta,
                                 const CODEX_ASN1::BigNumber& F,
                                 const CODEX_ASN1::BigNumber& M,
                                 const CODEX_ASN1::BigNumber& d1,
                                 const CODEX_ASN1::BigNumber& d2 );

         TranslationCertificate( const TranslationCertificate& aCert );

         virtual ~TranslationCertificate() {}

         void operator=( const TranslationCertificate& aCert );

         const CODEX_ASN1::BigNumber& z1bar() const { return m_z1bar; }
         const CODEX_ASN1::BigNumber& z2bar() const { return m_z2bar; }
         const CODEX_ASN1::BigNumber& G() const { return m_G; }
         const CODEX_ASN1::BigNumber& H() const { return m_H; }
         const CODEX_ASN1::BigNumber& delta() const { return m_delta; }
         const CODEX_ASN1::BigNumber& F() const { return m_F; }
         const CODEX_ASN1::BigNumber& M() const { return m_M; }
         const CODEX_ASN1::BigNumber& d1() const { return m_d1; }
         const CODEX_ASN1::BigNumber& d2() const { return m_d2; }

         bool verify( const CODEX_ASN1::BigNumber& yCreator,
                      const ElGamalPublicKey& pubKeyRecipient,
                      const ElGamalCipherText& cipherTextCreator,
                      const ElGamalCipherText& cipherTextRecipient,
                      const CODEX_ASN1::BigNumber& h,
                      const HashFunction& hashFunc ) const;

         int marshal( unsigned char ** pp ) const;

         void* unmarshal( void* bogus, unsigned char ** pp, long length );

      private :
         CODEX_ASN1::BigNumber m_z1bar;
         CODEX_ASN1::BigNumber m_z2bar;
         CODEX_ASN1::BigNumber m_G;
         CODEX_ASN1::BigNumber m_H;
         CODEX_ASN1::BigNumber m_delta;
         CODEX_ASN1::BigNumber m_F;
         CODEX_ASN1::BigNumber m_M;
         CODEX_ASN1::BigNumber m_d1;
         CODEX_ASN1::BigNumber m_d2;
   };
}

#endif /* __CODEX_CIPHERS_TRANSLATIONCERTIFICATE_H__ */

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