poulpy_core/layouts/
gglwe_ksk.rs

1use poulpy_hal::{
2    layouts::{Data, DataMut, DataRef, FillUniform, ReaderFrom, WriterTo},
3    source::Source,
4};
5
6use crate::layouts::{
7    Base2K, Degree, Digits, GGLWECiphertext, GGLWELayoutInfos, GLWECiphertext, GLWEInfos, LWEInfos, Rank, Rows, TorusPrecision,
8};
9use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
10
11use std::fmt;
12
13#[derive(PartialEq, Eq, Copy, Clone, Debug)]
14pub struct GGLWESwitchingKeyLayout {
15    pub n: Degree,
16    pub base2k: Base2K,
17    pub k: TorusPrecision,
18    pub rows: Rows,
19    pub digits: Digits,
20    pub rank_in: Rank,
21    pub rank_out: Rank,
22}
23
24impl LWEInfos for GGLWESwitchingKeyLayout {
25    fn n(&self) -> Degree {
26        self.n
27    }
28
29    fn base2k(&self) -> Base2K {
30        self.base2k
31    }
32
33    fn k(&self) -> TorusPrecision {
34        self.k
35    }
36}
37
38impl GLWEInfos for GGLWESwitchingKeyLayout {
39    fn rank(&self) -> Rank {
40        self.rank_out()
41    }
42}
43
44impl GGLWELayoutInfos for GGLWESwitchingKeyLayout {
45    fn rank_in(&self) -> Rank {
46        self.rank_in
47    }
48
49    fn rank_out(&self) -> Rank {
50        self.rank_out
51    }
52
53    fn digits(&self) -> Digits {
54        self.digits
55    }
56
57    fn rows(&self) -> Rows {
58        self.rows
59    }
60}
61
62#[derive(PartialEq, Eq, Clone)]
63pub struct GGLWESwitchingKey<D: Data> {
64    pub(crate) key: GGLWECiphertext<D>,
65    pub(crate) sk_in_n: usize,  // Degree of sk_in
66    pub(crate) sk_out_n: usize, // Degree of sk_out
67}
68
69impl<D: Data> LWEInfos for GGLWESwitchingKey<D> {
70    fn n(&self) -> Degree {
71        self.key.n()
72    }
73
74    fn base2k(&self) -> Base2K {
75        self.key.base2k()
76    }
77
78    fn k(&self) -> TorusPrecision {
79        self.key.k()
80    }
81
82    fn size(&self) -> usize {
83        self.key.size()
84    }
85}
86
87impl<D: Data> GLWEInfos for GGLWESwitchingKey<D> {
88    fn rank(&self) -> Rank {
89        self.rank_out()
90    }
91}
92
93impl<D: Data> GGLWELayoutInfos for GGLWESwitchingKey<D> {
94    fn rank_in(&self) -> Rank {
95        self.key.rank_in()
96    }
97
98    fn rank_out(&self) -> Rank {
99        self.key.rank_out()
100    }
101
102    fn digits(&self) -> Digits {
103        self.key.digits()
104    }
105
106    fn rows(&self) -> Rows {
107        self.key.rows()
108    }
109}
110
111impl<D: DataRef> fmt::Debug for GGLWESwitchingKey<D> {
112    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
113        write!(f, "{self}")
114    }
115}
116
117impl<D: DataRef> fmt::Display for GGLWESwitchingKey<D> {
118    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
119        write!(
120            f,
121            "(GLWESwitchingKey: sk_in_n={} sk_out_n={}) {}",
122            self.sk_in_n,
123            self.sk_out_n,
124            self.key.data()
125        )
126    }
127}
128
129impl<D: DataMut> FillUniform for GGLWESwitchingKey<D> {
130    fn fill_uniform(&mut self, log_bound: usize, source: &mut Source) {
131        self.key.fill_uniform(log_bound, source);
132    }
133}
134
135impl GGLWESwitchingKey<Vec<u8>> {
136    pub fn alloc<A>(infos: &A) -> Self
137    where
138        A: GGLWELayoutInfos,
139    {
140        GGLWESwitchingKey {
141            key: GGLWECiphertext::alloc(infos),
142            sk_in_n: 0,
143            sk_out_n: 0,
144        }
145    }
146
147    pub fn alloc_with(
148        n: Degree,
149        base2k: Base2K,
150        k: TorusPrecision,
151        rows: Rows,
152        digits: Digits,
153        rank_in: Rank,
154        rank_out: Rank,
155    ) -> Self {
156        GGLWESwitchingKey {
157            key: GGLWECiphertext::alloc_with(n, base2k, k, rows, digits, rank_in, rank_out),
158            sk_in_n: 0,
159            sk_out_n: 0,
160        }
161    }
162
163    pub fn alloc_bytes<A>(infos: &A) -> usize
164    where
165        A: GGLWELayoutInfos,
166    {
167        GGLWECiphertext::alloc_bytes(infos)
168    }
169
170    pub fn alloc_bytes_with(
171        n: Degree,
172        base2k: Base2K,
173        k: TorusPrecision,
174        rows: Rows,
175        digits: Digits,
176        rank_in: Rank,
177        rank_out: Rank,
178    ) -> usize {
179        GGLWECiphertext::alloc_bytes_with(n, base2k, k, rows, digits, rank_in, rank_out)
180    }
181}
182
183impl<D: DataRef> GGLWESwitchingKey<D> {
184    pub fn at(&self, row: usize, col: usize) -> GLWECiphertext<&[u8]> {
185        self.key.at(row, col)
186    }
187}
188
189impl<D: DataMut> GGLWESwitchingKey<D> {
190    pub fn at_mut(&mut self, row: usize, col: usize) -> GLWECiphertext<&mut [u8]> {
191        self.key.at_mut(row, col)
192    }
193}
194
195impl<D: DataMut> ReaderFrom for GGLWESwitchingKey<D> {
196    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
197        self.sk_in_n = reader.read_u64::<LittleEndian>()? as usize;
198        self.sk_out_n = reader.read_u64::<LittleEndian>()? as usize;
199        self.key.read_from(reader)
200    }
201}
202
203impl<D: DataRef> WriterTo for GGLWESwitchingKey<D> {
204    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
205        writer.write_u64::<LittleEndian>(self.sk_in_n as u64)?;
206        writer.write_u64::<LittleEndian>(self.sk_out_n as u64)?;
207        self.key.write_to(writer)
208    }
209}
poulpy_core/layouts/gglwe_ksk.rs

poulpy_core/layouts/
gglwe_ksk.rs
