Function cfm_keystore_get_secret 

#[unsafe(no_mangle)]
pub extern "C" fn cfm_keystore_get_secret(
    ks: *mut FFIKeystore,
    module_id: *const c_char,
    app_id: *const c_char,
    key_id: *const c_char,
    out: *mut *mut FFIKey,
) -> u32

Fetch a secret key from the private compartment.

On success writes the opaque key handle into *out.