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Add cross-basek normalization (#90)

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* added cross_basek_normalization

* updated method signatures to take layouts

* fixed cross-base normalization

fix #91
fix #93
This commit is contained in:
Jean-Philippe Bossuat
2025-09-30 14:40:10 +02:00
committed by GitHub
parent 4da790ea6a
commit 37e13b965c
216 changed files with 12481 additions and 7745 deletions
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297
poulpy-core/src/layouts/glwe_ct.rs
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@@ -1,17 +1,193 @@
use poulpy_hal::{
layouts::{Data, DataMut, DataRef, FillUniform, ReaderFrom, Reset, ToOwnedDeep, VecZnx, VecZnxToMut, VecZnxToRef, WriterTo},
layouts::{
Data, DataMut, DataRef, FillUniform, ReaderFrom, ToOwnedDeep, VecZnx, VecZnxToMut, VecZnxToRef, WriterTo, ZnxInfos,
},
source::Source,
};
use crate::layouts::{Infos, SetMetaData};
use crate::layouts::{Base2K, BuildError, Degree, LWEInfos, Rank, TorusPrecision};
use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
use std::fmt;
pub trait GLWEInfos
where
Self: LWEInfos,
{
fn rank(&self) -> Rank;
fn glwe_layout(&self) -> GLWECiphertextLayout {
GLWECiphertextLayout {
n: self.n(),
base2k: self.base2k(),
k: self.k(),
rank: self.rank(),
}
}
}
pub trait GLWELayoutSet {
fn set_k(&mut self, k: TorusPrecision);
fn set_basek(&mut self, base2k: Base2K);
}
#[derive(PartialEq, Eq, Copy, Clone, Debug)]
pub struct GLWECiphertextLayout {
pub n: Degree,
pub base2k: Base2K,
pub k: TorusPrecision,
pub rank: Rank,
}
impl LWEInfos for GLWECiphertextLayout {
fn n(&self) -> Degree {
self.n
}
fn base2k(&self) -> Base2K {
self.base2k
}
fn k(&self) -> TorusPrecision {
self.k
}
}
impl GLWEInfos for GLWECiphertextLayout {
fn rank(&self) -> Rank {
self.rank
}
}
#[derive(PartialEq, Eq, Clone)]
pub struct GLWECiphertext<D: Data> {
pub data: VecZnx<D>,
pub basek: usize,
pub k: usize,
pub(crate) data: VecZnx<D>,
pub(crate) base2k: Base2K,
pub(crate) k: TorusPrecision,
}
impl<D: DataMut> GLWELayoutSet for GLWECiphertext<D> {
fn set_basek(&mut self, base2k: Base2K) {
self.base2k = base2k
}
fn set_k(&mut self, k: TorusPrecision) {
self.k = k
}
}
impl<D: DataRef> GLWECiphertext<D> {
pub fn data(&self) -> &VecZnx<D> {
&self.data
}
}
impl<D: DataMut> GLWECiphertext<D> {
pub fn data_mut(&mut self) -> &mut VecZnx<D> {
&mut self.data
}
}
pub struct GLWECiphertextBuilder<D: Data> {
data: Option<VecZnx<D>>,
base2k: Option<Base2K>,
k: Option<TorusPrecision>,
}
impl<D: Data> GLWECiphertext<D> {
#[inline]
pub fn builder() -> GLWECiphertextBuilder<D> {
GLWECiphertextBuilder {
data: None,
base2k: None,
k: None,
}
}
}
impl GLWECiphertextBuilder<Vec<u8>> {
#[inline]
pub fn layout<A>(mut self, layout: &A) -> Self
where
A: GLWEInfos,
{
self.data = Some(VecZnx::alloc(
layout.n().into(),
(layout.rank() + 1).into(),
layout.size(),
));
self.base2k = Some(layout.base2k());
self.k = Some(layout.k());
self
}
}
impl<D: Data> GLWECiphertextBuilder<D> {
#[inline]
pub fn data(mut self, data: VecZnx<D>) -> Self {
self.data = Some(data);
self
}
#[inline]
pub fn base2k(mut self, base2k: Base2K) -> Self {
self.base2k = Some(base2k);
self
}
#[inline]
pub fn k(mut self, k: TorusPrecision) -> Self {
self.k = Some(k);
self
}
pub fn build(self) -> Result<GLWECiphertext<D>, BuildError> {
let data: VecZnx<D> = self.data.ok_or(BuildError::MissingData)?;
let base2k: Base2K = self.base2k.ok_or(BuildError::MissingBase2K)?;
let k: TorusPrecision = self.k.ok_or(BuildError::MissingK)?;
if base2k == 0_u32 {
return Err(BuildError::ZeroBase2K);
}
if k == 0_u32 {
return Err(BuildError::ZeroTorusPrecision);
}
if data.n() == 0 {
return Err(BuildError::ZeroDegree);
}
if data.cols() == 0 {
return Err(BuildError::ZeroCols);
}
if data.size() == 0 {
return Err(BuildError::ZeroLimbs);
}
Ok(GLWECiphertext { data, base2k, k })
}
}
impl<D: Data> LWEInfos for GLWECiphertext<D> {
fn base2k(&self) -> Base2K {
self.base2k
}
fn k(&self) -> TorusPrecision {
self.k
}
fn n(&self) -> Degree {
Degree(self.data.n() as u32)
}
fn size(&self) -> usize {
self.data.size()
}
}
impl<D: Data> GLWEInfos for GLWECiphertext<D> {
fn rank(&self) -> Rank {
Rank(self.data.cols() as u32 - 1)
}
}
impl<D: DataRef> ToOwnedDeep for GLWECiphertext<D> {
@@ -19,15 +195,15 @@ impl<D: DataRef> ToOwnedDeep for GLWECiphertext<D> {
fn to_owned_deep(&self) -> Self::Owned {
GLWECiphertext {
data: self.data.to_owned_deep(),
basek: self.basek,
k: self.k,
base2k: self.base2k,
}
}
}
impl<D: DataRef> fmt::Debug for GLWECiphertext<D> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self)
write!(f, "{self}")
}
}
@@ -35,25 +211,14 @@ impl<D: DataRef> fmt::Display for GLWECiphertext<D> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"GLWECiphertext: basek={} k={}: {}",
self.basek(),
self.k(),
"GLWECiphertext: base2k={} k={}: {}",
self.base2k().0,
self.k().0,
self.data
)
}
}
impl<D: DataMut> Reset for GLWECiphertext<D>
where
VecZnx<D>: Reset,
{
fn reset(&mut self) {
self.data.reset();
self.basek = 0;
self.k = 0;
}
}
impl<D: DataMut> FillUniform for GLWECiphertext<D> {
fn fill_uniform(&mut self, log_bound: usize, source: &mut Source) {
self.data.fill_uniform(log_bound, source);
@@ -61,91 +226,75 @@ impl<D: DataMut> FillUniform for GLWECiphertext<D> {
}
impl GLWECiphertext<Vec<u8>> {
pub fn alloc(n: usize, basek: usize, k: usize, rank: usize) -> Self {
pub fn alloc<A>(infos: &A) -> Self
where
A: GLWEInfos,
{
Self::alloc_with(infos.n(), infos.base2k(), infos.k(), infos.rank())
}
pub fn alloc_with(n: Degree, base2k: Base2K, k: TorusPrecision, rank: Rank) -> Self {
Self {
data: VecZnx::alloc(n, rank + 1, k.div_ceil(basek)),
basek,
data: VecZnx::alloc(n.into(), (rank + 1).into(), k.0.div_ceil(base2k.0) as usize),
base2k,
k,
}
}
pub fn bytes_of(n: usize, basek: usize, k: usize, rank: usize) -> usize {
VecZnx::alloc_bytes(n, rank + 1, k.div_ceil(basek))
pub fn alloc_bytes<A>(infos: &A) -> usize
where
A: GLWEInfos,
{
Self::alloc_bytes_with(infos.n(), infos.base2k(), infos.k(), infos.rank())
}
pub fn alloc_bytes_with(n: Degree, base2k: Base2K, k: TorusPrecision, rank: Rank) -> usize {
VecZnx::alloc_bytes(n.into(), (rank + 1).into(), k.0.div_ceil(base2k.0) as usize)
}
}
impl<D: Data> Infos for GLWECiphertext<D> {
type Inner = VecZnx<D>;
fn inner(&self) -> &Self::Inner {
&self.data
}
fn basek(&self) -> usize {
self.basek
}
fn k(&self) -> usize {
self.k
}
}
impl<D: Data> GLWECiphertext<D> {
pub fn rank(&self) -> usize {
self.cols() - 1
}
}
impl<D: DataMut> SetMetaData for GLWECiphertext<D> {
fn set_k(&mut self, k: usize) {
self.k = k
}
fn set_basek(&mut self, basek: usize) {
self.basek = basek
}
}
pub trait GLWECiphertextToRef: Infos {
pub trait GLWECiphertextToRef {
fn to_ref(&self) -> GLWECiphertext<&[u8]>;
}
impl<D: DataRef> GLWECiphertextToRef for GLWECiphertext<D> {
fn to_ref(&self) -> GLWECiphertext<&[u8]> {
GLWECiphertext {
data: self.data.to_ref(),
basek: self.basek,
k: self.k,
}
GLWECiphertext::builder()
.k(self.k())
.base2k(self.base2k())
.data(self.data.to_ref())
.build()
.unwrap()
}
}
pub trait GLWECiphertextToMut: Infos {
pub trait GLWECiphertextToMut {
fn to_mut(&mut self) -> GLWECiphertext<&mut [u8]>;
}
impl<D: DataMut> GLWECiphertextToMut for GLWECiphertext<D> {
fn to_mut(&mut self) -> GLWECiphertext<&mut [u8]> {
GLWECiphertext {
data: self.data.to_mut(),
basek: self.basek,
k: self.k,
}
GLWECiphertext::builder()
.k(self.k())
.base2k(self.base2k())
.data(self.data.to_mut())
.build()
.unwrap()
}
}
impl<D: DataMut> ReaderFrom for GLWECiphertext<D> {
fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
self.k = reader.read_u64::<LittleEndian>()? as usize;
self.basek = reader.read_u64::<LittleEndian>()? as usize;
self.k = TorusPrecision(reader.read_u32::<LittleEndian>()?);
self.base2k = Base2K(reader.read_u32::<LittleEndian>()?);
self.data.read_from(reader)
}
}
impl<D: DataRef> WriterTo for GLWECiphertext<D> {
fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
writer.write_u64::<LittleEndian>(self.k as u64)?;
writer.write_u64::<LittleEndian>(self.basek as u64)?;
writer.write_u32::<LittleEndian>(self.k.0)?;
writer.write_u32::<LittleEndian>(self.base2k.0)?;
self.data.write_to(writer)
}
}