FIPS mode and ECDSA explicit curves

[Felipe Gasper]

Hello,

What is the best way to test whether a given OpenSSL build supports explicit 
ECDSA curves?

Specifically, I’d like to know whether the OpenSSL in question will fail the 
test at line 106 of providers/common/securitycheck.c:

        if (nid == NID_undef) {
            ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_CURVE,
                           "Explicit curves are not allowed in fips mode");
            return 0;
        }

Thank you!

cheers,
-Felipe Gasper