1use poulpy_hal::{
  2    layouts::{Data, DataMut, DataRef, FillUniform, ReaderFrom, WriterTo},
  3    source::Source,
  4};
  5
  6use crate::layouts::{
  7    Base2K, Degree, Dnum, Dsize, GGLWE, GGLWEInfos, GGLWEToMut, GGLWEToRef, GLWE, GLWEInfos, LWEInfos, Rank, TorusPrecision,
  8};
  9use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
 10
 11use std::fmt;
 12
 13#[derive(PartialEq, Eq, Copy, Clone, Debug)]
 14pub struct AutomorphismKeyLayout {
 15    pub n: Degree,
 16    pub base2k: Base2K,
 17    pub k: TorusPrecision,
 18    pub rank: Rank,
 19    pub dnum: Dnum,
 20    pub dsize: Dsize,
 21}
 22
 23#[derive(PartialEq, Eq, Clone)]
 24pub struct AutomorphismKey<D: Data> {
 25    pub(crate) key: GGLWE<D>,
 26    pub(crate) p: i64,
 27}
 28
 29pub trait GetGaloisElement {
 30    fn p(&self) -> i64;
 31}
 32
 33pub trait SetGaloisElement {
 34    fn set_p(&mut self, p: i64);
 35}
 36
 37impl<D: DataMut> SetGaloisElement for AutomorphismKey<D> {
 38    fn set_p(&mut self, p: i64) {
 39        self.p = p
 40    }
 41}
 42
 43impl<D: DataRef> GetGaloisElement for AutomorphismKey<D> {
 44    fn p(&self) -> i64 {
 45        self.p
 46    }
 47}
 48
 49impl<D: Data> AutomorphismKey<D> {
 50    pub fn p(&self) -> i64 {
 51        self.p
 52    }
 53}
 54
 55impl<D: Data> LWEInfos for AutomorphismKey<D> {
 56    fn n(&self) -> Degree {
 57        self.key.n()
 58    }
 59
 60    fn base2k(&self) -> Base2K {
 61        self.key.base2k()
 62    }
 63
 64    fn k(&self) -> TorusPrecision {
 65        self.key.k()
 66    }
 67
 68    fn size(&self) -> usize {
 69        self.key.size()
 70    }
 71}
 72
 73impl<D: Data> GLWEInfos for AutomorphismKey<D> {
 74    fn rank(&self) -> Rank {
 75        self.rank_out()
 76    }
 77}
 78
 79impl<D: Data> GGLWEInfos for AutomorphismKey<D> {
 80    fn rank_in(&self) -> Rank {
 81        self.key.rank_in()
 82    }
 83
 84    fn rank_out(&self) -> Rank {
 85        self.key.rank_out()
 86    }
 87
 88    fn dsize(&self) -> Dsize {
 89        self.key.dsize()
 90    }
 91
 92    fn dnum(&self) -> Dnum {
 93        self.key.dnum()
 94    }
 95}
 96
 97impl LWEInfos for AutomorphismKeyLayout {
 98    fn base2k(&self) -> Base2K {
 99        self.base2k
100    }
101
102    fn k(&self) -> TorusPrecision {
103        self.k
104    }
105
106    fn n(&self) -> Degree {
107        self.n
108    }
109}
110
111impl GLWEInfos for AutomorphismKeyLayout {
112    fn rank(&self) -> Rank {
113        self.rank
114    }
115}
116
117impl GGLWEInfos for AutomorphismKeyLayout {
118    fn rank_in(&self) -> Rank {
119        self.rank
120    }
121
122    fn dsize(&self) -> Dsize {
123        self.dsize
124    }
125
126    fn rank_out(&self) -> Rank {
127        self.rank
128    }
129
130    fn dnum(&self) -> Dnum {
131        self.dnum
132    }
133}
134
135impl<D: DataRef> fmt::Debug for AutomorphismKey<D> {
136    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
137        write!(f, "{self}")
138    }
139}
140
141impl<D: DataMut> FillUniform for AutomorphismKey<D> {
142    fn fill_uniform(&mut self, log_bound: usize, source: &mut Source) {
143        self.key.fill_uniform(log_bound, source);
144    }
145}
146
147impl<D: DataRef> fmt::Display for AutomorphismKey<D> {
148    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
149        write!(f, "(AutomorphismKey: p={}) {}", self.p, self.key)
150    }
151}
152
153impl AutomorphismKey<Vec<u8>> {
154    pub fn alloc_from_infos<A>(infos: &A) -> Self
155    where
156        A: GGLWEInfos,
157    {
158        Self::alloc(
159            infos.n(),
160            infos.base2k(),
161            infos.k(),
162            infos.rank(),
163            infos.dnum(),
164            infos.dsize(),
165        )
166    }
167
168    pub fn alloc(n: Degree, base2k: Base2K, k: TorusPrecision, rank: Rank, dnum: Dnum, dsize: Dsize) -> Self {
169        AutomorphismKey {
170            key: GGLWE::alloc(n, base2k, k, rank, rank, dnum, dsize),
171            p: 0,
172        }
173    }
174
175    pub fn bytes_of_from_infos<A>(infos: &A) -> usize
176    where
177        A: GGLWEInfos,
178    {
179        assert_eq!(
180            infos.rank_in(),
181            infos.rank_out(),
182            "rank_in != rank_out is not supported for AutomorphismKey"
183        );
184        Self::bytes_of(
185            infos.n(),
186            infos.base2k(),
187            infos.k(),
188            infos.rank(),
189            infos.dnum(),
190            infos.dsize(),
191        )
192    }
193
194    pub fn bytes_of(n: Degree, base2k: Base2K, k: TorusPrecision, rank: Rank, dnum: Dnum, dsize: Dsize) -> usize {
195        GGLWE::bytes_of(n, base2k, k, rank, rank, dnum, dsize)
196    }
197}
198
199impl<D: DataMut> GGLWEToMut for AutomorphismKey<D> {
200    fn to_mut(&mut self) -> GGLWE<&mut [u8]> {
201        self.key.to_mut()
202    }
203}
204
205impl<D: DataMut> GGLWEToRef for AutomorphismKey<D> {
206    fn to_ref(&self) -> GGLWE<&[u8]> {
207        self.key.to_ref()
208    }
209}
210
211impl<D: DataRef> AutomorphismKey<D> {
212    pub fn at(&self, row: usize, col: usize) -> GLWE<&[u8]> {
213        self.key.at(row, col)
214    }
215}
216
217impl<D: DataMut> AutomorphismKey<D> {
218    pub fn at_mut(&mut self, row: usize, col: usize) -> GLWE<&mut [u8]> {
219        self.key.at_mut(row, col)
220    }
221}
222
223impl<D: DataMut> ReaderFrom for AutomorphismKey<D> {
224    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
225        self.p = reader.read_u64::<LittleEndian>()? as i64;
226        self.key.read_from(reader)
227    }
228}
229
230impl<D: DataRef> WriterTo for AutomorphismKey<D> {
231    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
232        writer.write_u64::<LittleEndian>(self.p as u64)?;
233        self.key.write_to(writer)
234    }
235}