ciphergroup.hpp

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#ifndef _CIPHERGROUP_H_
#define _CIPHERGROUP_H_


namespace elGamal {


// forward declarations
class CipherText;
class ArrayOfCiphers;


class CipherGroup
{
private:
        arithm::Group * grp;
        
public:
        CipherGroup(arithm::Group * group);

        arithm::Group * getGrp();

        CipherText getCipherText(verifierUtils::ByteTree * bt);

        ArrayOfCiphers getArrayOfCiphers(verifierUtils::ByteTree * bt);



        CipherText enc(arithm::Elmt y, arithm::Elmt m, arithm::Elmt s);

        arithm::Elmt dec(arithm::Elmt x, CipherText uv);

        arithm::Elmt pdec(arithm::Elmt xl, CipherText uv);

        arithm::ArrayOfElmts pdec(arithm::Elmt xl, ArrayOfCiphers uv);

        arithm::Elmt tdec(CipherText uv, arithm::Elmt f);

        arithm::ArrayOfElmts tdec(ArrayOfCiphers uv, arithm::ArrayOfElmts f);



        CipherText exponentiation(CipherText c, arithm::Elmt s);
        
        CipherText multiplication(CipherText c1, CipherText c2);
        
        ArrayOfCiphers exponentiation(ArrayOfCiphers c, arithm::ArrayOfElmts s);
        
        CipherText expProduct(ArrayOfCiphers c, arithm::ArrayOfElmts s);
        
        bool compare(CipherText c1, CipherText c2);

        bool compare(ArrayOfCiphers c1, ArrayOfCiphers c2);
};

}

#endif