poulpy_core/layouts/
gglwe_ct.rs

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

poulpy_core/layouts/
gglwe_ct.rs
