Add helper function to get the version of the token's firmware.

Signed-off-by: Neal H. Walfield <neal@sequoia-pgp.org>

Author: nwalfield

cryptoki/tests/common.rs

@@ -50,3 +50,10 @@ pub fn init_pins() -> (Pkcs11, Slot) {
 
     (pkcs11, slot)
 }
+
+pub fn get_firmware_version(pkcs11: &Pkcs11, slot: Slot) -> (u8, u8) {
+    let info = pkcs11.get_slot_info(slot).unwrap();
+
+    let v = info.firmware_version();
+    (v.major(), v.minor())
+}