feat: supports yubikey init

src/yubikey_hmac.rs

@@ -0,0 +1,29 @@
+use std::ops::Deref;
+use rust_util::{opt_result, success, XResult};
+use yubico_manager::config::{Config, Mode, Slot};
+use yubico_manager::Yubico;
+
+pub fn yubikey_challenge_as_32_bytes(challenge_bytes: &[u8]) -> XResult<Vec<u8>> {
+    let mut yubi = Yubico::new();
+    let device = opt_result!(yubi.find_yubikey(), "Find yubikey failed: {}");
+
+    success!("Found key, Vendor ID: {:?}, Product ID: {:?}", device.vendor_id, device.product_id);
+
+    let config = Config::default()
+        .set_vendor_id(device.vendor_id)
+        .set_product_id(device.product_id)
+        .set_variable_size(true)
+        .set_mode(Mode::Sha1)
+        .set_slot(Slot::Slot2);
+
+    // In HMAC Mode, the result will always be the SAME for the SAME provided challenge
+    let hmac_result = opt_result!(yubi.challenge_response_hmac(&challenge_bytes, config), "Challenge HMAC failed: {}");
+
+    // Just for debug, lets check the hex
+    let v: &[u8] = hmac_result.deref();
+
+    let mut r = vec![];
+    r.extend_from_slice(v);
+    r.extend_from_slice(&v[0..12]);
+    Ok(r)
+}