Sets the parameter of a ec over GF2m defined by y^2 + x*y = x^3 + a*x^2 + b
\param group EC_GROUP object
\param p BIGNUM with the polynomial defining the underlying field
\param a BIGNUM with parameter a of the equation
\param b BIGNUM with parameter b of the equation
\param ctx BN_CTX object (optional)
\return 1 on success and 0 if an error occured
Sets the parameter of a ec over GF2m defined by y^2 + x*y = x^3 + a*x^2 + b \param group EC_GROUP object \param p BIGNUM with the polynomial defining the underlying field \param a BIGNUM with parameter a of the equation \param b BIGNUM with parameter b of the equation \param ctx BN_CTX object (optional) \return 1 on success and 0 if an error occured