various API uniformization

rlwe/src/ciphertext.rs

@@ -0,0 +1,17 @@
+use crate::elem::Elem;
+use crate::parameters::Parameters;
+use crate::plaintext::Plaintext;
+
+pub struct Ciphertext(pub Elem);
+
+impl Parameters {
+    pub fn new_ciphertext(&self, degree: usize, log_q: usize) -> Ciphertext {
+        Ciphertext(self.new_elem(degree, log_q))
+    }
+}
+
+impl Ciphertext {
+    pub fn as_plaintext(&self) -> Plaintext {
+        unsafe { Plaintext(std::ptr::read(&self.0)) }
+    }
+}