poulpy_core/layouts/compressed/
lwe_ct.rs

1use std::fmt;
2
3use poulpy_hal::{
4    api::{FillUniform, Reset, VecZnxFillUniform, ZnxInfos, ZnxView, ZnxViewMut},
5    layouts::{Backend, Data, DataMut, DataRef, Module, ReaderFrom, VecZnx, WriterTo},
6    source::Source,
7};
8
9use crate::layouts::{Infos, LWECiphertext, SetMetaData, compressed::Decompress};
10
11#[derive(PartialEq, Eq, Clone)]
12pub struct LWECiphertextCompressed<D: Data> {
13    pub(crate) data: VecZnx<D>,
14    pub(crate) k: usize,
15    pub(crate) basek: usize,
16    pub(crate) seed: [u8; 32],
17}
18
19impl<D: DataRef> fmt::Debug for LWECiphertextCompressed<D> {
20    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
21        write!(f, "{}", self)
22    }
23}
24
25impl<D: DataRef> fmt::Display for LWECiphertextCompressed<D> {
26    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
27        write!(
28            f,
29            "LWECiphertextCompressed: basek={} k={} seed={:?}: {}",
30            self.basek(),
31            self.k(),
32            self.seed,
33            self.data
34        )
35    }
36}
37
38impl<D: DataMut> Reset for LWECiphertextCompressed<D>
39where
40    VecZnx<D>: Reset,
41{
42    fn reset(&mut self) {
43        self.data.reset();
44        self.basek = 0;
45        self.k = 0;
46        self.seed = [0u8; 32];
47    }
48}
49
50impl<D: DataMut> FillUniform for LWECiphertextCompressed<D> {
51    fn fill_uniform(&mut self, source: &mut Source) {
52        self.data.fill_uniform(source);
53    }
54}
55
56impl LWECiphertextCompressed<Vec<u8>> {
57    pub fn alloc(basek: usize, k: usize) -> Self {
58        Self {
59            data: VecZnx::alloc(1, 1, k.div_ceil(basek)),
60            k,
61            basek,
62            seed: [0u8; 32],
63        }
64    }
65}
66
67impl<D: Data> Infos for LWECiphertextCompressed<D>
68where
69    VecZnx<D>: ZnxInfos,
70{
71    type Inner = VecZnx<D>;
72
73    fn n(&self) -> usize {
74        &self.inner().n() - 1
75    }
76
77    fn inner(&self) -> &Self::Inner {
78        &self.data
79    }
80
81    fn basek(&self) -> usize {
82        self.basek
83    }
84
85    fn k(&self) -> usize {
86        self.k
87    }
88}
89
90impl<DataSelf: DataMut> SetMetaData for LWECiphertextCompressed<DataSelf> {
91    fn set_k(&mut self, k: usize) {
92        self.k = k
93    }
94
95    fn set_basek(&mut self, basek: usize) {
96        self.basek = basek
97    }
98}
99
100use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
101
102impl<D: DataMut> ReaderFrom for LWECiphertextCompressed<D> {
103    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
104        self.k = reader.read_u64::<LittleEndian>()? as usize;
105        self.basek = reader.read_u64::<LittleEndian>()? as usize;
106        reader.read_exact(&mut self.seed)?;
107        self.data.read_from(reader)
108    }
109}
110
111impl<D: DataRef> WriterTo for LWECiphertextCompressed<D> {
112    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
113        writer.write_u64::<LittleEndian>(self.k as u64)?;
114        writer.write_u64::<LittleEndian>(self.basek as u64)?;
115        writer.write_all(&self.seed)?;
116        self.data.write_to(writer)
117    }
118}
119
120impl<D: DataMut, B: Backend, DR: DataRef> Decompress<B, LWECiphertextCompressed<DR>> for LWECiphertext<D> {
121    fn decompress(&mut self, module: &Module<B>, other: &LWECiphertextCompressed<DR>)
122    where
123        Module<B>: VecZnxFillUniform,
124    {
125        let mut source = Source::new(other.seed);
126        module.vec_znx_fill_uniform(other.basek(), &mut self.data, 0, other.k(), &mut source);
127        (0..self.size()).for_each(|i| {
128            self.data.at_mut(0, i)[0] = other.data.at(0, i)[0];
129        });
130    }
131}
poulpy_core/layouts/compressed/lwe_ct.rs

poulpy_core/layouts/compressed/
lwe_ct.rs
