Function is_running 

pub fn is_running(libctx: Option<&Arc<LibCtx>>) -> bool

Returns true if the FIPS provider is loaded and available in the given library context.

Pass None to query the default (process-wide) library context.

Uses OSSL_PROVIDER_available — no fips-provider feature required.

Example

use native_ossl::fips;
if fips::is_running(None) {
    println!("Running in FIPS mode");
}