1use backend::hal::{
  2    api::{FillUniform, Reset},
  3    layouts::{Data, DataMut, DataRef, MatZnx, ReaderFrom, WriterTo},
  4};
  5
  6use crate::layouts::{GGLWESwitchingKey, GLWECiphertext, Infos};
  7use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
  8
  9use std::fmt;
 10
 11#[derive(PartialEq, Eq, Clone)]
 12pub struct GGLWEAutomorphismKey<D: Data> {
 13    pub(crate) key: GGLWESwitchingKey<D>,
 14    pub(crate) p: i64,
 15}
 16
 17impl<D: DataRef> fmt::Debug for GGLWEAutomorphismKey<D> {
 18    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 19        write!(f, "{}", self)
 20    }
 21}
 22
 23impl<D: DataMut> FillUniform for GGLWEAutomorphismKey<D> {
 24    fn fill_uniform(&mut self, source: &mut sampling::source::Source) {
 25        self.key.fill_uniform(source);
 26    }
 27}
 28
 29impl<D: DataMut> Reset for GGLWEAutomorphismKey<D>
 30where
 31    MatZnx<D>: Reset,
 32{
 33    fn reset(&mut self) {
 34        self.key.reset();
 35        self.p = 0;
 36    }
 37}
 38
 39impl<D: DataRef> fmt::Display for GGLWEAutomorphismKey<D> {
 40    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 41        write!(f, "(AutomorphismKey: p={}) {}", self.p, self.key)
 42    }
 43}
 44
 45impl GGLWEAutomorphismKey<Vec<u8>> {
 46    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self {
 47        GGLWEAutomorphismKey {
 48            key: GGLWESwitchingKey::alloc(n, basek, k, rows, digits, rank, rank),
 49            p: 0,
 50        }
 51    }
 52
 53    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize {
 54        GGLWESwitchingKey::bytes_of(n, basek, k, rows, digits, rank, rank)
 55    }
 56}
 57
 58impl<D: Data> Infos for GGLWEAutomorphismKey<D> {
 59    type Inner = MatZnx<D>;
 60
 61    fn inner(&self) -> &Self::Inner {
 62        self.key.inner()
 63    }
 64
 65    fn basek(&self) -> usize {
 66        self.key.basek()
 67    }
 68
 69    fn k(&self) -> usize {
 70        self.key.k()
 71    }
 72}
 73
 74impl<D: Data> GGLWEAutomorphismKey<D> {
 75    pub fn p(&self) -> i64 {
 76        self.p
 77    }
 78
 79    pub fn digits(&self) -> usize {
 80        self.key.digits()
 81    }
 82
 83    pub fn rank(&self) -> usize {
 84        self.key.rank()
 85    }
 86
 87    pub fn rank_in(&self) -> usize {
 88        self.key.rank_in()
 89    }
 90
 91    pub fn rank_out(&self) -> usize {
 92        self.key.rank_out()
 93    }
 94}
 95
 96impl<D: DataRef> GGLWEAutomorphismKey<D> {
 97    pub fn at(&self, row: usize, col: usize) -> GLWECiphertext<&[u8]> {
 98        self.key.at(row, col)
 99    }
100}
101
102impl<D: DataMut> GGLWEAutomorphismKey<D> {
103    pub fn at_mut(&mut self, row: usize, col: usize) -> GLWECiphertext<&mut [u8]> {
104        self.key.at_mut(row, col)
105    }
106}
107
108impl<D: DataMut> ReaderFrom for GGLWEAutomorphismKey<D> {
109    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
110        self.p = reader.read_u64::<LittleEndian>()? as i64;
111        self.key.read_from(reader)
112    }
113}
114
115impl<D: DataRef> WriterTo for GGLWEAutomorphismKey<D> {
116    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
117        writer.write_u64::<LittleEndian>(self.p as u64)?;
118        self.key.write_to(writer)
119    }
120}