poulpy_core/layouts/
glwe_pk.rs

1use poulpy_hal::layouts::{Data, DataMut, DataRef, ReaderFrom, VecZnx, WriterTo};
2
3use crate::{dist::Distribution, layouts::Infos};
4use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
5
6#[derive(PartialEq, Eq)]
7pub struct GLWEPublicKey<D: Data> {
8    pub(crate) data: VecZnx<D>,
9    pub(crate) basek: usize,
10    pub(crate) k: usize,
11    pub(crate) dist: Distribution,
12}
13
14impl GLWEPublicKey<Vec<u8>> {
15    pub fn alloc(n: usize, basek: usize, k: usize, rank: usize) -> Self {
16        Self {
17            data: VecZnx::alloc(n, rank + 1, k.div_ceil(basek)),
18            basek,
19            k,
20            dist: Distribution::NONE,
21        }
22    }
23
24    pub fn bytes_of(n: usize, basek: usize, k: usize, rank: usize) -> usize {
25        VecZnx::alloc_bytes(n, rank + 1, k.div_ceil(basek))
26    }
27}
28
29impl<D: Data> Infos for GLWEPublicKey<D> {
30    type Inner = VecZnx<D>;
31
32    fn inner(&self) -> &Self::Inner {
33        &self.data
34    }
35
36    fn basek(&self) -> usize {
37        self.basek
38    }
39
40    fn k(&self) -> usize {
41        self.k
42    }
43}
44
45impl<D: Data> GLWEPublicKey<D> {
46    pub fn rank(&self) -> usize {
47        self.cols() - 1
48    }
49}
50
51impl<D: DataMut> ReaderFrom for GLWEPublicKey<D> {
52    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
53        self.k = reader.read_u64::<LittleEndian>()? as usize;
54        self.basek = reader.read_u64::<LittleEndian>()? as usize;
55        match Distribution::read_from(reader) {
56            Ok(dist) => self.dist = dist,
57            Err(e) => return Err(e),
58        }
59        self.data.read_from(reader)
60    }
61}
62
63impl<D: DataRef> WriterTo for GLWEPublicKey<D> {
64    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
65        writer.write_u64::<LittleEndian>(self.k as u64)?;
66        writer.write_u64::<LittleEndian>(self.basek as u64)?;
67        match self.dist.write_to(writer) {
68            Ok(()) => {}
69            Err(e) => return Err(e),
70        }
71        self.data.write_to(writer)
72    }
73}
poulpy_core/layouts/glwe_pk.rs

poulpy_core/layouts/
glwe_pk.rs
