BN_mul
BN_mul(sk, tmp, sk, ctx);
BN_mul(power, power, power, NULL);
BN_mul(power, power, power, NULL);
BN_mul(temp, power, temp, NULL);
BN_mul(res, res, i, NULL);
int BN_mul(BIGNUM */*r*/, const BIGNUM */*a*/, const BIGNUM */*b*/, BN_CTX */*ctx*/);
BN_mul(t1, nbytes, BN_value_100(), NULL);
BN_mul(t1, max, BN_value_10(), NULL);
if (BN_mul(t1, nbytes, post, NULL) == 0)
BN_mul(bn, bn, sn, ctx);
bn_check(BN_mul(r->number, a->number, b->number, ctx));
bn_check(BN_mul(n, n, a, ctx));