poulpy_core/layouts/
lwe_ct.rs

1use std::fmt;
2
3use poulpy_hal::{
4    api::{FillUniform, Reset, ZnxInfos},
5    layouts::{Data, DataMut, DataRef, ReaderFrom, VecZnx, VecZnxToMut, VecZnxToRef, WriterTo},
6    source::Source,
7};
8
9#[derive(PartialEq, Eq, Clone)]
10pub struct LWECiphertext<D: Data> {
11    pub(crate) data: VecZnx<D>,
12    pub(crate) k: usize,
13    pub(crate) basek: usize,
14}
15
16impl<D: DataRef> LWECiphertext<D> {
17    pub fn data(&self) -> &VecZnx<D> {
18        &self.data
19    }
20}
21
22impl<D: DataMut> LWECiphertext<D> {
23    pub fn data_mut(&mut self) -> &VecZnx<D> {
24        &mut self.data
25    }
26}
27
28impl<D: DataRef> fmt::Debug for LWECiphertext<D> {
29    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
30        write!(f, "{}", self)
31    }
32}
33
34impl<D: DataRef> fmt::Display for LWECiphertext<D> {
35    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
36        write!(
37            f,
38            "LWECiphertext: basek={} k={}: {}",
39            self.basek(),
40            self.k(),
41            self.data
42        )
43    }
44}
45
46impl<D: DataMut> Reset for LWECiphertext<D> {
47    fn reset(&mut self) {
48        self.data.reset();
49        self.basek = 0;
50        self.k = 0;
51    }
52}
53
54impl<D: DataMut> FillUniform for LWECiphertext<D>
55where
56    VecZnx<D>: FillUniform,
57{
58    fn fill_uniform(&mut self, source: &mut Source) {
59        self.data.fill_uniform(source);
60    }
61}
62
63impl LWECiphertext<Vec<u8>> {
64    pub fn alloc(n: usize, basek: usize, k: usize) -> Self {
65        Self {
66            data: VecZnx::alloc(n + 1, 1, k.div_ceil(basek)),
67            k,
68            basek,
69        }
70    }
71}
72
73impl<D: Data> Infos for LWECiphertext<D>
74where
75    VecZnx<D>: ZnxInfos,
76{
77    type Inner = VecZnx<D>;
78
79    fn n(&self) -> usize {
80        &self.inner().n() - 1
81    }
82
83    fn inner(&self) -> &Self::Inner {
84        &self.data
85    }
86
87    fn basek(&self) -> usize {
88        self.basek
89    }
90
91    fn k(&self) -> usize {
92        self.k
93    }
94}
95
96impl<DataSelf: DataMut> SetMetaData for LWECiphertext<DataSelf> {
97    fn set_k(&mut self, k: usize) {
98        self.k = k
99    }
100
101    fn set_basek(&mut self, basek: usize) {
102        self.basek = basek
103    }
104}
105
106pub trait LWECiphertextToRef {
107    fn to_ref(&self) -> LWECiphertext<&[u8]>;
108}
109
110impl<D: DataRef> LWECiphertextToRef for LWECiphertext<D> {
111    fn to_ref(&self) -> LWECiphertext<&[u8]> {
112        LWECiphertext {
113            data: self.data.to_ref(),
114            basek: self.basek,
115            k: self.k,
116        }
117    }
118}
119
120pub trait LWECiphertextToMut {
121    #[allow(dead_code)]
122    fn to_mut(&mut self) -> LWECiphertext<&mut [u8]>;
123}
124
125impl<D: DataMut> LWECiphertextToMut for LWECiphertext<D> {
126    fn to_mut(&mut self) -> LWECiphertext<&mut [u8]> {
127        LWECiphertext {
128            data: self.data.to_mut(),
129            basek: self.basek,
130            k: self.k,
131        }
132    }
133}
134
135use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
136
137use crate::layouts::{Infos, SetMetaData};
138
139impl<D: DataMut> ReaderFrom for LWECiphertext<D> {
140    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
141        self.k = reader.read_u64::<LittleEndian>()? as usize;
142        self.basek = reader.read_u64::<LittleEndian>()? as usize;
143        self.data.read_from(reader)
144    }
145}
146
147impl<D: DataRef> WriterTo for LWECiphertext<D> {
148    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
149        writer.write_u64::<LittleEndian>(self.k as u64)?;
150        writer.write_u64::<LittleEndian>(self.basek as u64)?;
151        self.data.write_to(writer)
152    }
153}
poulpy_core/layouts/lwe_ct.rs

poulpy_core/layouts/
lwe_ct.rs
