poulpy_core/layouts/
gglwe_ct.rs

1use poulpy_hal::{
2    api::{FillUniform, Reset},
3    layouts::{Data, DataMut, DataRef, MatZnx, ReaderFrom, WriterTo},
4    source::Source,
5};
6
7use crate::layouts::{GLWECiphertext, Infos};
8use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
9
10use std::fmt;
11
12#[derive(PartialEq, Eq, Clone)]
13pub struct GGLWECiphertext<D: Data> {
14    pub(crate) data: MatZnx<D>,
15    pub(crate) basek: usize,
16    pub(crate) k: usize,
17    pub(crate) digits: usize,
18}
19
20impl<D: DataRef> fmt::Debug for GGLWECiphertext<D> {
21    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
22        write!(f, "{}", self)
23    }
24}
25
26impl<D: DataMut> FillUniform for GGLWECiphertext<D> {
27    fn fill_uniform(&mut self, source: &mut Source) {
28        self.data.fill_uniform(source);
29    }
30}
31
32impl<D: DataMut> Reset for GGLWECiphertext<D> {
33    fn reset(&mut self) {
34        self.data.reset();
35        self.basek = 0;
36        self.k = 0;
37        self.digits = 0;
38    }
39}
40
41impl<D: DataRef> fmt::Display for GGLWECiphertext<D> {
42    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
43        write!(
44            f,
45            "(GGLWECiphertext: basek={} k={} digits={}) {}",
46            self.basek, self.k, self.digits, self.data
47        )
48    }
49}
50
51impl<D: DataRef> GGLWECiphertext<D> {
52    pub fn at(&self, row: usize, col: usize) -> GLWECiphertext<&[u8]> {
53        GLWECiphertext {
54            data: self.data.at(row, col),
55            basek: self.basek,
56            k: self.k,
57        }
58    }
59}
60
61impl<D: DataMut> GGLWECiphertext<D> {
62    pub fn at_mut(&mut self, row: usize, col: usize) -> GLWECiphertext<&mut [u8]> {
63        GLWECiphertext {
64            data: self.data.at_mut(row, col),
65            basek: self.basek,
66            k: self.k,
67        }
68    }
69}
70
71impl GGLWECiphertext<Vec<u8>> {
72    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> Self {
73        let size: usize = k.div_ceil(basek);
74        debug_assert!(
75            size > digits,
76            "invalid gglwe: ceil(k/basek): {} <= digits: {}",
77            size,
78            digits
79        );
80
81        assert!(
82            rows * digits <= size,
83            "invalid gglwe: rows: {} * digits:{} > ceil(k/basek): {}",
84            rows,
85            digits,
86            size
87        );
88
89        Self {
90            data: MatZnx::alloc(n, rows, rank_in, rank_out + 1, size),
91            basek,
92            k,
93            digits,
94        }
95    }
96
97    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank_in: usize, rank_out: usize) -> usize {
98        let size: usize = k.div_ceil(basek);
99        debug_assert!(
100            size > digits,
101            "invalid gglwe: ceil(k/basek): {} <= digits: {}",
102            size,
103            digits
104        );
105
106        assert!(
107            rows * digits <= size,
108            "invalid gglwe: rows: {} * digits:{} > ceil(k/basek): {}",
109            rows,
110            digits,
111            size
112        );
113
114        MatZnx::alloc_bytes(n, rows, rank_in, rank_out + 1, rows)
115    }
116}
117
118impl<D: Data> Infos for GGLWECiphertext<D> {
119    type Inner = MatZnx<D>;
120
121    fn inner(&self) -> &Self::Inner {
122        &self.data
123    }
124
125    fn basek(&self) -> usize {
126        self.basek
127    }
128
129    fn k(&self) -> usize {
130        self.k
131    }
132}
133
134impl<D: Data> GGLWECiphertext<D> {
135    pub fn rank(&self) -> usize {
136        self.data.cols_out() - 1
137    }
138
139    pub fn digits(&self) -> usize {
140        self.digits
141    }
142
143    pub fn rank_in(&self) -> usize {
144        self.data.cols_in()
145    }
146
147    pub fn rank_out(&self) -> usize {
148        self.data.cols_out() - 1
149    }
150}
151
152impl<D: DataMut> ReaderFrom for GGLWECiphertext<D> {
153    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
154        self.k = reader.read_u64::<LittleEndian>()? as usize;
155        self.basek = reader.read_u64::<LittleEndian>()? as usize;
156        self.digits = reader.read_u64::<LittleEndian>()? as usize;
157        self.data.read_from(reader)
158    }
159}
160
161impl<D: DataRef> WriterTo for GGLWECiphertext<D> {
162    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
163        writer.write_u64::<LittleEndian>(self.k as u64)?;
164        writer.write_u64::<LittleEndian>(self.basek as u64)?;
165        writer.write_u64::<LittleEndian>(self.digits as u64)?;
166        self.data.write_to(writer)
167    }
168}
poulpy_core/layouts/gglwe_ct.rs

poulpy_core/layouts/
gglwe_ct.rs
