Creates a new EC_GROUP object with the specified parameters defined
over GFp (defined by the equation y^2 = x^3 + a*x + b)
\param p BIGNUM with the prime number
\param a BIGNUM with the parameter a of the equation
\param b BIGNUM with the parameter b of the equation
\param ctx BN_CTX object (optional)
\return newly created EC_GROUP object with the specified parameters
Creates a new EC_GROUP object with the specified parameters defined over GFp (defined by the equation y^2 = x^3 + a*x + b) \param p BIGNUM with the prime number \param a BIGNUM with the parameter a of the equation \param b BIGNUM with the parameter b of the equation \param ctx BN_CTX object (optional) \return newly created EC_GROUP object with the specified parameters