Traits reduction, file + structs renaming

poulpy-core/src/encryption/glwe_switching_key.rs

@@ -0,0 +1,158 @@
+use poulpy_hal::{
+    api::{ModuleN, ScratchAvailable, ScratchTakeBasic, SvpPrepare, VecZnxSwitchRing},
+    layouts::{Backend, DataMut, Module, ScalarZnx, Scratch},
+    source::Source,
+};
+
+use crate::{
+    ScratchTakeCore,
+    encryption::gglwe::GGLWEEncryptSk,
+    layouts::{
+        GGLWEInfos, GGLWEToMut, GLWEInfos, GLWESecret, GLWESecretToRef, GLWESwitchingKey, GLWESwitchingKeyDegreesMut, LWEInfos,
+        prepared::GLWESecretPreparedApi,
+    },
+};
+
+impl GLWESwitchingKey<Vec<u8>> {
+    pub fn encrypt_sk_tmp_bytes<M, A, BE: Backend>(module: &M, infos: &A) -> usize
+    where
+        A: GGLWEInfos,
+        M: GLWESwitchingKeyEncryptSk<BE>,
+    {
+        module.glwe_switching_key_encrypt_sk_tmp_bytes(infos)
+    }
+
+    pub fn encrypt_pk_tmp_bytes<M, A, BE: Backend>(module: &M, infos: &A) -> usize
+    where
+        A: GGLWEInfos,
+        M: GLWESwitchingKeyEncryptPk<BE>,
+    {
+        module.glwe_switching_key_encrypt_pk_tmp_bytes(infos)
+    }
+}
+
+impl<DataSelf: DataMut> GLWESwitchingKey<DataSelf> {
+    pub fn encrypt_sk<M, S1, S2, BE: Backend>(
+        &mut self,
+        module: &M,
+        sk_in: &S1,
+        sk_out: &S2,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        scratch: &mut Scratch<BE>,
+    ) where
+        S1: GLWESecretToRef,
+        S2: GLWESecretToRef,
+        M: GLWESwitchingKeyEncryptSk<BE>,
+        Scratch<BE>: ScratchTakeCore<BE>,
+    {
+        module.glwe_switching_key_encrypt_sk(self, sk_in, sk_out, source_xa, source_xe, scratch);
+    }
+}
+
+pub trait GLWESwitchingKeyEncryptSk<BE: Backend> {
+    fn glwe_switching_key_encrypt_sk_tmp_bytes<A>(&self, infos: &A) -> usize
+    where
+        A: GGLWEInfos;
+
+    fn glwe_switching_key_encrypt_sk<R, S1, S2>(
+        &self,
+        res: &mut R,
+        sk_in: &S1,
+        sk_out: &S2,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        scratch: &mut Scratch<BE>,
+    ) where
+        R: GGLWEToMut + GLWESwitchingKeyDegreesMut + GGLWEInfos,
+        S1: GLWESecretToRef,
+        S2: GLWESecretToRef;
+}
+
+impl<BE: Backend> GLWESwitchingKeyEncryptSk<BE> for Module<BE>
+where
+    Self: ModuleN + GGLWEEncryptSk<BE> + GLWESecretPreparedApi<BE> + VecZnxSwitchRing + SvpPrepare<BE>,
+    Scratch<BE>: ScratchTakeCore<BE>,
+{
+    fn glwe_switching_key_encrypt_sk_tmp_bytes<A>(&self, infos: &A) -> usize
+    where
+        A: GGLWEInfos,
+    {
+        self.gglwe_encrypt_sk_tmp_bytes(infos)
+            .max(ScalarZnx::bytes_of(self.n(), 1))
+            + ScalarZnx::bytes_of(self.n(), infos.rank_in().into())
+            + self.bytes_of_glwe_secret_prepared_from_infos(infos)
+    }
+
+    fn glwe_switching_key_encrypt_sk<R, S1, S2>(
+        &self,
+        res: &mut R,
+        sk_in: &S1,
+        sk_out: &S2,
+        source_xa: &mut Source,
+        source_xe: &mut Source,
+        scratch: &mut Scratch<BE>,
+    ) where
+        R: GGLWEToMut + GLWESwitchingKeyDegreesMut + GGLWEInfos,
+        S1: GLWESecretToRef,
+        S2: GLWESecretToRef,
+    {
+        let sk_in: &GLWESecret<&[u8]> = &sk_in.to_ref();
+        let sk_out: &GLWESecret<&[u8]> = &sk_out.to_ref();
+
+        assert!(sk_in.n().0 <= self.n() as u32);
+        assert!(sk_out.n().0 <= self.n() as u32);
+        assert!(
+            scratch.available() >= self.glwe_switching_key_encrypt_sk_tmp_bytes(res),
+            "scratch.available()={} < GLWESwitchingKey::encrypt_sk_tmp_bytes={}",
+            scratch.available(),
+            self.glwe_switching_key_encrypt_sk_tmp_bytes(res)
+        );
+
+        let (mut sk_in_tmp, scratch_1) = scratch.take_scalar_znx(self, sk_in.rank().into());
+        for i in 0..sk_in.rank().into() {
+            self.vec_znx_switch_ring(
+                &mut sk_in_tmp.as_vec_znx_mut(),
+                i,
+                &sk_in.data.as_vec_znx(),
+                i,
+            );
+        }
+
+        let (mut sk_out_tmp, scratch_2) = scratch_1.take_glwe_secret_prepared(self, sk_out.rank());
+        {
+            let (mut tmp, _) = scratch_2.take_scalar_znx(self, 1);
+            for i in 0..sk_out.rank().into() {
+                self.vec_znx_switch_ring(&mut tmp.as_vec_znx_mut(), 0, &sk_out.data.as_vec_znx(), i);
+                self.svp_prepare(&mut sk_out_tmp.data, i, &tmp, 0);
+            }
+        }
+
+        self.gglwe_encrypt_sk(
+            res,
+            &sk_in_tmp,
+            &sk_out_tmp,
+            source_xa,
+            source_xe,
+            scratch_2,
+        );
+
+        *res.input_degree() = sk_in.n();
+        *res.output_degree() = sk_out.n();
+    }
+}
+
+pub trait GLWESwitchingKeyEncryptPk<BE: Backend> {
+    fn glwe_switching_key_encrypt_pk_tmp_bytes<A>(&self, infos: &A) -> usize
+    where
+        A: GGLWEInfos;
+}
+
+impl<BE: Backend> GLWESwitchingKeyEncryptPk<BE> for Module<BE> {
+    fn glwe_switching_key_encrypt_pk_tmp_bytes<A>(&self, _infos: &A) -> usize
+    where
+        A: GGLWEInfos,
+    {
+        unimplemented!()
+    }
+}