wip on BR + added enc/dec for LWE

core/src/lwe/ciphertext.rs

@@ -0,0 +1,77 @@
+use backend::{VecZnx, VecZnxToMut, VecZnxToRef};
+
+use crate::{Infos, SetMetaData};
+
+pub struct LWECiphertext<D> {
+    pub(crate) data: VecZnx<D>,
+    pub(crate) k: usize,
+    pub(crate) basek: usize,
+}
+
+impl LWECiphertext<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize) -> Self {
+        Self {
+            data: VecZnx::new::<i64>(n, 1, k.div_ceil(basek)),
+            k: k,
+            basek: basek,
+        }
+    }
+}
+
+impl<T> Infos for LWECiphertext<T> {
+    type Inner = VecZnx<T>;
+
+    fn n(&self) -> usize{
+        &self.inner().n-1
+    }
+
+    fn inner(&self) -> &Self::Inner {
+        &self.data
+    }
+
+    fn basek(&self) -> usize {
+        self.basek
+    }
+
+    fn k(&self) -> usize {
+        self.k
+    }
+}
+
+impl<DataSelf: AsMut<[u8]> + AsRef<[u8]>> SetMetaData for LWECiphertext<DataSelf> {
+    fn set_k(&mut self, k: usize) {
+        self.k = k
+    }
+
+    fn set_basek(&mut self, basek: usize) {
+        self.basek = basek
+    }
+}
+
+pub trait LWECiphertextToRef {
+    fn to_ref(&self) -> LWECiphertext<&[u8]>;
+}
+
+impl<D: AsRef<[u8]>> LWECiphertextToRef for LWECiphertext<D> {
+    fn to_ref(&self) -> LWECiphertext<&[u8]> {
+        LWECiphertext {
+            data: self.data.to_ref(),
+            basek: self.basek,
+            k: self.k,
+        }
+    }
+}
+
+pub trait LWECiphertextToMut {
+    fn to_mut(&mut self) -> LWECiphertext<&mut [u8]>;
+}
+
+impl<D: AsMut<[u8]> + AsRef<[u8]>> LWECiphertextToMut for LWECiphertext<D> {
+    fn to_mut(&mut self) -> LWECiphertext<&mut [u8]> {
+        LWECiphertext {
+            data: self.data.to_mut(),
+            basek: self.basek,
+            k: self.k,
+        }
+    }
+}