diff --git a/__hid/yubikey_rs/Cargo.lock b/__hid/yubikey_rs/Cargo.lock
index b24fdf3..3ff05c2 100644
--- a/__hid/yubikey_rs/Cargo.lock
+++ b/__hid/yubikey_rs/Cargo.lock
@@ -266,6 +266,12 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "hex"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
+
 [[package]]
 name = "hmac"
 version = "0.11.0"
@@ -912,6 +918,7 @@ dependencies = [
 name = "yubikey_rs"
 version = "0.1.0"
 dependencies = [
+ "hex",
  "yubikey",
 ]
 
diff --git a/__hid/yubikey_rs/Cargo.toml b/__hid/yubikey_rs/Cargo.toml
index 5e480f9..59d285d 100644
--- a/__hid/yubikey_rs/Cargo.toml
+++ b/__hid/yubikey_rs/Cargo.toml
@@ -6,5 +6,6 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+hex = "0.4.3"
 yubikey = "0.4.2"
-
+#yubikey-piv = {version = "0.3.0", features = ["untested"]}
diff --git a/__hid/yubikey_rs/src/main.rs b/__hid/yubikey_rs/src/main.rs
index 8544579..b14f06a 100644
--- a/__hid/yubikey_rs/src/main.rs
+++ b/__hid/yubikey_rs/src/main.rs
@@ -1,16 +1,22 @@
 use yubikey::YubiKey;
+use yubikey::piv::{AlgorithmId, SlotId};
 
 fn main() {
-    let mut yubikey = YubiKey::open().unwrap();
-    println!("serial: {}", yubikey.serial());
-    println!("version: {}", yubikey.version());
-    println!("name: {}", yubikey.name());
-    println!("chuid: {:?}", yubikey.chuid());
-    println!("cccid: {:?}", yubikey.cccid());
-    println!("config: {:?}", yubikey.config());
-    let keys = yubikey.piv_keys().unwrap();
-    for k in keys {
-        println!("piv: {:?}", k);
-    }
-    println!("{:?}", yubikey.verify_pin(b"123456"));
+    let mut yk = YubiKey::open().unwrap();
+    println!("serial: {}", yk.serial());
+    println!("version: {}", yk.version());
+    println!("name: {}", yk.name());
+    println!("chuid: {:?}", yk.chuid());
+    println!("cccid: {:?}", yk.cccid());
+    println!("config: {:?}", yk.config());
+    // let keys = yubikey.piv_keys().unwrap();
+    // for k in keys {
+    //     println!("piv: {:?}", k);
+    // }
+    println!("{:?}", yk.verify_pin(b"123456"));
+    let raw_in = [1_u8; 256];
+    // let raw_in = hex::decode("c25cebe2b6ad6e3e2d9494f707666a711a2f347a02c5bf95d686703dfdd9743d").unwrap();
+    let s = yubikey::piv::sign_data(&mut yk, &raw_in, AlgorithmId::Rsa2048, SlotId::Signature);
+    println!("{:?}", s);
+    println!("{:?}", hex::encode(s.unwrap().as_slice()));
 }