BN_mod_exp2_mont
if (!BN_mod_exp2_mont(t1, dsa->params.g, u1, dsa->pub_key, u2,
int BN_mod_exp2_mont(BIGNUM *r, const BIGNUM *a1, const BIGNUM *p1,
if (!TEST_int_eq(BN_mod_exp2_mont(exp_result, exp_a1, exp_p1, exp_a2,