poulpy_core/encryption/
gglwe_atk.rs

1use poulpy_hal::{
2    api::{
3        ScratchAvailable, SvpApplyInplace, SvpPPolAllocBytes, SvpPrepare, TakeScalarZnx, TakeVecZnx, TakeVecZnxDft,
4        VecZnxAddInplace, VecZnxAddNormal, VecZnxAddScalarInplace, VecZnxAutomorphism, VecZnxBigNormalize, VecZnxDftAllocBytes,
5        VecZnxDftFromVecZnx, VecZnxDftToVecZnxBigConsume, VecZnxFillUniform, VecZnxNormalize, VecZnxNormalizeInplace,
6        VecZnxNormalizeTmpBytes, VecZnxSub, VecZnxSubABInplace, VecZnxSwithcDegree,
7    },
8    layouts::{Backend, DataMut, DataRef, Module, Scratch},
9    source::Source,
10};
11
12use crate::{
13    TakeGLWESecret, TakeGLWESecretPrepared,
14    layouts::{GGLWEAutomorphismKey, GGLWESwitchingKey, GLWESecret},
15};
16
17impl GGLWEAutomorphismKey<Vec<u8>> {
18    pub fn encrypt_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
19    where
20        Module<B>: SvpPPolAllocBytes + VecZnxNormalizeTmpBytes + VecZnxDftAllocBytes + VecZnxNormalizeTmpBytes,
21    {
22        GGLWESwitchingKey::encrypt_sk_scratch_space(module, n, basek, k, rank, rank) + GLWESecret::bytes_of(n, rank)
23    }
24
25    pub fn encrypt_pk_scratch_space<B: Backend>(module: &Module<B>, _n: usize, _basek: usize, _k: usize, _rank: usize) -> usize {
26        GGLWESwitchingKey::encrypt_pk_scratch_space(module, _n, _basek, _k, _rank, _rank)
27    }
28}
29
30impl<DataSelf: DataMut> GGLWEAutomorphismKey<DataSelf> {
31    #[allow(clippy::too_many_arguments)]
32    pub fn encrypt_sk<DataSk: DataRef, B: Backend>(
33        &mut self,
34        module: &Module<B>,
35        p: i64,
36        sk: &GLWESecret<DataSk>,
37        source_xa: &mut Source,
38        source_xe: &mut Source,
39        sigma: f64,
40        scratch: &mut Scratch<B>,
41    ) where
42        Module<B>: VecZnxAddScalarInplace
43            + VecZnxDftAllocBytes
44            + VecZnxBigNormalize<B>
45            + VecZnxDftFromVecZnx<B>
46            + SvpApplyInplace<B>
47            + VecZnxDftToVecZnxBigConsume<B>
48            + VecZnxNormalizeTmpBytes
49            + VecZnxFillUniform
50            + VecZnxSubABInplace
51            + VecZnxAddInplace
52            + VecZnxNormalizeInplace<B>
53            + VecZnxAddNormal
54            + VecZnxNormalize<B>
55            + VecZnxSub
56            + SvpPrepare<B>
57            + VecZnxSwithcDegree
58            + SvpPPolAllocBytes
59            + VecZnxAutomorphism,
60        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx + TakeScalarZnx + TakeGLWESecretPrepared<B>,
61    {
62        #[cfg(debug_assertions)]
63        {
64            use crate::layouts::Infos;
65
66            assert_eq!(self.n(), sk.n());
67            assert_eq!(self.rank_out(), self.rank_in());
68            assert_eq!(sk.rank(), self.rank());
69            assert!(
70                scratch.available()
71                    >= GGLWEAutomorphismKey::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k(), self.rank()),
72                "scratch.available(): {} < AutomorphismKey::encrypt_sk_scratch_space(module, self.rank()={}, self.size()={}): {}",
73                scratch.available(),
74                self.rank(),
75                self.size(),
76                GGLWEAutomorphismKey::encrypt_sk_scratch_space(module, sk.n(), self.basek(), self.k(), self.rank())
77            )
78        }
79
80        let (mut sk_out, scratch_1) = scratch.take_glwe_secret(sk.n(), sk.rank());
81
82        {
83            (0..self.rank()).for_each(|i| {
84                module.vec_znx_automorphism(
85                    module.galois_element_inv(p),
86                    &mut sk_out.data.as_vec_znx_mut(),
87                    i,
88                    &sk.data.as_vec_znx(),
89                    i,
90                );
91            });
92        }
93
94        self.key
95            .encrypt_sk(module, sk, &sk_out, source_xa, source_xe, sigma, scratch_1);
96
97        self.p = p;
98    }
99}
poulpy_core/encryption/gglwe_atk.rs

poulpy_core/encryption/
gglwe_atk.rs
