feat: add mlkem decap

src/mlkem.rs

@@ -94,3 +94,15 @@ pub fn mlkem_encap(pk: &MLKEMPubKey) -> (MLKEMCiphertext, MLKEMSharedKey) {
 
     (ct, ss)
 }
+
+pub fn mlkem_decap(ct: &MLKEMCiphertext, sk: &MLKEMPrivKey) -> MLKEMSharedKey {
+    let ss = MLKEMSharedKey(SharedPtr::<32>::new().unwrap());
+
+    let mut agent = MLKEMAGENT.lock().unwrap();
+
+    unsafe {
+        agent.perform_ipc_call(1, &[ss.0.get_offset(), ct.0.get_offset(), sk.0.get_offset()]);
+    }
+
+    ss
+}