331   BigNum* cofactor = NULL;  in NewG1()  local
388     result = NewBigNum(sizeof(BigNumStr), &cofactor);  in NewG1()
393     result = ReadBigNum(&h1, sizeof(h1), cofactor);  in NewG1()
397     result = NewEcGroup(Fq, fq_a, fq_b, g1_x, g1_y, order, cofactor, &ec);  in NewG1()
405   DeleteBigNum(&cofactor);  in NewG1()
424   BigNum* cofactor = NULL;  in NewG2()  local
476     result = NewBigNum(2 * sizeof(param->q), &cofactor);  in NewG2()
480     result = BigNumAdd(q, q, cofactor);  in NewG2()
484     result = BigNumSub(cofactor, p, cofactor);  in NewG2()
493     result = BigNumMul(p, cofactor, order);  in NewG2()
503     result = NewEcGroup(Fq2, a, b, x, y, order, cofactor, &ec);  in NewG2()
511   DeleteBigNum(&cofactor);  in NewG2()