feat: read flot meta

__crypto/yubikey-rs-demo/src/main.rs

@@ -1,9 +1,9 @@
 use p256::{ecdh::EphemeralSecret, EncodedPoint, PublicKey};
 use p256::elliptic_curve::sec1::{FromEncodedPoint, ToEncodedPoint};
 use rand::rngs::OsRng;
-use rust_util::{failure_and_exit, information, XResult};
+use rust_util::{failure_and_exit, information, warning, XResult};
 use yubikey::Context;
-use yubikey::piv::{AlgorithmId, decrypt_data, RetiredSlotId, SlotId};
+use yubikey::piv::{AlgorithmId, decrypt_data, metadata, RetiredSlotId, SlotId};
 
 // const EPK_BYTES: usize = 33;
 
@@ -57,7 +57,14 @@ fn main() -> XResult<()> {
     let shared_secret = esk.diffie_hellman(&public_key);
     information!("Shared secret: {}", hex::encode(shared_secret.raw_secret_bytes()));
 
-    // yubikey.verify_pin(b"123456").expect("Verify pin!");
+    let meta_result = metadata(&mut yubikey, SlotId::Retired(RetiredSlotId::R1));
+    match meta_result {
+        Ok(meta) => {
+            information!("{:?}", meta)
+        }
+        Err(e) => warning!("Get slot meta failed: {}", e)
+    }
+    yubikey.verify_pin(b"123456").expect("Verify pin!");
     let decrypted_shared_secret = decrypt_data(
         &mut yubikey,
         epk_bytes.decompress().as_bytes(),