feat: updates

examples/private_ecdh.rs

@@ -0,0 +1,13 @@
+use base64::engine::general_purpose::STANDARD;
+use base64::Engine;
+use swift_secure_enclave_tool_rs::private_key_ecdh;
+
+fn main() {
+    let args = std::env::args().collect::<Vec<_>>();
+    let private_key_representation = STANDARD.decode(&args[1]).unwrap();
+    let epk = hex::decode(&args[2]).unwrap();
+
+    let shared_secret = private_key_ecdh(&private_key_representation, &epk);
+
+    println!("{}", hex::encode(&shared_secret));
+}