From 8e03973dda94390d92218f6bc4fa8f4a9253aa96 Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Sat, 11 Mar 2023 00:32:57 +0800
Subject: [PATCH] feat: add yubikey-rs-demo

---
 __crypto/yubikey-rs-demo/Cargo.lock  | 1410 ++++++++++++++++++++++++++
 __crypto/yubikey-rs-demo/Cargo.toml  |   15 +
 __crypto/yubikey-rs-demo/src/main.rs |   72 ++
 3 files changed, 1497 insertions(+)
 create mode 100644 __crypto/yubikey-rs-demo/Cargo.lock
 create mode 100644 __crypto/yubikey-rs-demo/Cargo.toml
 create mode 100644 __crypto/yubikey-rs-demo/src/main.rs

diff --git a/__crypto/yubikey-rs-demo/Cargo.lock b/__crypto/yubikey-rs-demo/Cargo.lock
new file mode 100644
index 0000000..f6eb86e
--- /dev/null
+++ b/__crypto/yubikey-rs-demo/Cargo.lock
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+ "rand",
+ "rust_util",
+ "sha2",
+ "yubikey",
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diff --git a/__crypto/yubikey-rs-demo/Cargo.toml b/__crypto/yubikey-rs-demo/Cargo.toml
new file mode 100644
index 0000000..76cb502
--- /dev/null
+++ b/__crypto/yubikey-rs-demo/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "yubikey-rs-demo"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+elliptic-curve = { version = "0.13.2", features = ["sec1"] }
+hex = "0.4.3"
+p256 = { version = "0.13.0", features = ["ecdh"] }
+rand = "0.8.5"
+rust_util = "0.6.41"
+sha2 = "0.10.6"
+yubikey = { version = "0.7.0", features = ["untested"] }
diff --git a/__crypto/yubikey-rs-demo/src/main.rs b/__crypto/yubikey-rs-demo/src/main.rs
new file mode 100644
index 0000000..2a7d179
--- /dev/null
+++ b/__crypto/yubikey-rs-demo/src/main.rs
@@ -0,0 +1,72 @@
+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 yubikey::Context;
+use yubikey::piv::{AlgorithmId, decrypt_data, RetiredSlotId, SlotId};
+
+// const EPK_BYTES: usize = 33;
+
+#[derive(Debug)]
+pub(crate) struct EphemeralKeyBytes(p256::EncodedPoint);
+
+impl EphemeralKeyBytes {
+    // fn from_bytes(bytes: [u8; EPK_BYTES]) -> Option<Self> {
+    //     let encoded = p256::EncodedPoint::from_bytes(&bytes).ok()?;
+    //     if encoded.is_compressed()
+    //         && p256::PublicKey::from_encoded_point(&encoded)
+    //         .is_some()
+    //         .into()
+    //     {
+    //         Some(EphemeralKeyBytes(encoded))
+    //     } else {
+    //         None
+    //     }
+    // }
+
+    fn from_public_key(epk: &p256::PublicKey) -> Self {
+        EphemeralKeyBytes(epk.to_encoded_point(true))
+    }
+
+    // pub(crate) fn as_bytes(&self) -> &[u8] {
+    //     self.0.as_bytes()
+    // }
+
+    pub(crate) fn decompress(&self) -> p256::EncodedPoint {
+        // EphemeralKeyBytes is a valid compressed encoding by construction.
+        let p = p256::PublicKey::from_encoded_point(&self.0).unwrap();
+        p.to_encoded_point(false)
+    }
+}
+
+fn main() -> XResult<()> {
+    let mut readers = Context::open()?;
+    let reader = readers.iter()?.next().unwrap_or_else(|| failure_and_exit!("No reader!"));
+    let mut yubikey = reader.open()?;
+
+    let esk = EphemeralSecret::random(&mut OsRng);
+    let epk = esk.public_key();
+    let epk_bytes = EphemeralKeyBytes::from_public_key(&epk);
+
+    let encoded_point = EncodedPoint::from_bytes(&hex::decode(
+        "04dd3eebd906c9cf00b08ec29f7ed61804d1cc1d1352d9257b628191e08fc3717c4fae3298cd5c4829cec8bf3a946e7db60b7857e1287f6a0bae6b3f2342f007d0"
+    )?)?;
+
+    let public_key = PublicKey::from_encoded_point(&encoded_point).unwrap();
+
+    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 decrypted_shared_secret = decrypt_data(
+        &mut yubikey,
+        epk_bytes.decompress().as_bytes(),
+        AlgorithmId::EccP256,
+        SlotId::Retired(RetiredSlotId::R1),
+    )?;
+
+    information!("Decrypted shared secret: {}", hex::encode(&decrypted_shared_secret.to_vec()));
+
+    Ok(())
+}
+