if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0)
group->field_mod_func = BN_nist_mod_192;
else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0)
if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0)
group->field_mod_func = BN_nist_mod_192;
else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0)