Initial commit

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/cipher.rs

@@ -0,0 +1,15 @@
+use crate::application_data::ApplicationData;
+use crate::extensions::extension_data::supported_groups::NamedGroup;
+use p256::ecdh::SharedSecret;
+
+pub struct CryptoEngine {}
+
+#[allow(clippy::unused_self, clippy::needless_pass_by_value)]
+impl CryptoEngine {
+    pub fn new(_group: NamedGroup, _shared: SharedSecret) -> Self {
+        Self {}
+    }
+
+    #[allow(dead_code)]
+    pub fn decrypt(&self, _: &ApplicationData) {}
+}