poulpy_core/layouts/
glwe_public_key.rs

1use poulpy_hal::layouts::{Data, DataMut, DataRef, ReaderFrom, VecZnx, WriterTo};
2
3use crate::{
4    GetDistribution, GetDistributionMut,
5    dist::Distribution,
6    layouts::{Base2K, Degree, GLWE, GLWEInfos, GLWEToMut, GLWEToRef, LWEInfos, Rank, TorusPrecision},
7};
8
9#[derive(PartialEq, Eq)]
10pub struct GLWEPublicKey<D: Data> {
11    pub(crate) key: GLWE<D>,
12    pub(crate) dist: Distribution,
13}
14
15impl<D: DataMut> GetDistributionMut for GLWEPublicKey<D> {
16    fn dist_mut(&mut self) -> &mut Distribution {
17        &mut self.dist
18    }
19}
20
21impl<D: DataRef> GetDistribution for GLWEPublicKey<D> {
22    fn dist(&self) -> &Distribution {
23        &self.dist
24    }
25}
26
27#[derive(PartialEq, Eq, Copy, Clone, Debug)]
28pub struct GLWEPublicKeyLayout {
29    pub n: Degree,
30    pub base2k: Base2K,
31    pub k: TorusPrecision,
32    pub rank: Rank,
33}
34
35impl<D: Data> LWEInfos for GLWEPublicKey<D> {
36    fn base2k(&self) -> Base2K {
37        self.key.base2k()
38    }
39
40    fn k(&self) -> TorusPrecision {
41        self.key.k()
42    }
43
44    fn n(&self) -> Degree {
45        self.key.n()
46    }
47
48    fn size(&self) -> usize {
49        self.key.size()
50    }
51}
52
53impl<D: Data> GLWEInfos for GLWEPublicKey<D> {
54    fn rank(&self) -> Rank {
55        self.key.rank()
56    }
57}
58
59impl LWEInfos for GLWEPublicKeyLayout {
60    fn base2k(&self) -> Base2K {
61        self.base2k
62    }
63
64    fn k(&self) -> TorusPrecision {
65        self.k
66    }
67
68    fn n(&self) -> Degree {
69        self.n
70    }
71
72    fn size(&self) -> usize {
73        self.k.0.div_ceil(self.base2k.0) as usize
74    }
75}
76
77impl GLWEInfos for GLWEPublicKeyLayout {
78    fn rank(&self) -> Rank {
79        self.rank
80    }
81}
82
83impl GLWEPublicKey<Vec<u8>> {
84    pub fn alloc_from_infos<A>(infos: &A) -> Self
85    where
86        A: GLWEInfos,
87    {
88        Self::alloc(infos.n(), infos.base2k(), infos.k(), infos.rank())
89    }
90
91    pub fn alloc(n: Degree, base2k: Base2K, k: TorusPrecision, rank: Rank) -> Self {
92        GLWEPublicKey {
93            key: GLWE::alloc(n, base2k, k, rank),
94            dist: Distribution::NONE,
95        }
96    }
97
98    pub fn bytes_of_from_infos<A>(infos: &A) -> usize
99    where
100        A: GLWEInfos,
101    {
102        Self::bytes_of(infos.n(), infos.base2k(), infos.k(), infos.rank())
103    }
104
105    pub fn bytes_of(n: Degree, base2k: Base2K, k: TorusPrecision, rank: Rank) -> usize {
106        VecZnx::bytes_of(n.into(), (rank + 1).into(), k.0.div_ceil(base2k.0) as usize)
107    }
108}
109
110impl<D: DataMut> ReaderFrom for GLWEPublicKey<D> {
111    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
112        match Distribution::read_from(reader) {
113            Ok(dist) => self.dist = dist,
114            Err(e) => return Err(e),
115        }
116        self.key.read_from(reader)
117    }
118}
119
120impl<D: DataRef> WriterTo for GLWEPublicKey<D> {
121    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
122        match self.dist.write_to(writer) {
123            Ok(()) => {}
124            Err(e) => return Err(e),
125        }
126        self.key.write_to(writer)
127    }
128}
129
130impl<D: DataRef> GLWEToRef for GLWEPublicKey<D> {
131    fn to_ref(&self) -> GLWE<&[u8]> {
132        self.key.to_ref()
133    }
134}
135
136impl<D: DataMut> GLWEToMut for GLWEPublicKey<D> {
137    fn to_mut(&mut self) -> GLWE<&mut [u8]> {
138        self.key.to_mut()
139    }
140}
poulpy_core/layouts/glwe_public_key.rs

poulpy_core/layouts/
glwe_public_key.rs
