poulpy_core/encryption/
gglwe_atk.rs

1use poulpy_hal::{
2    api::{
3        ScratchAvailable, SvpApplyDftToDftInplace, SvpPPolAllocBytes, SvpPrepare, TakeScalarZnx, TakeVecZnx, TakeVecZnxDft,
4        VecZnxAddInplace, VecZnxAddNormal, VecZnxAddScalarInplace, VecZnxAutomorphism, VecZnxBigNormalize, VecZnxDftAllocBytes,
5        VecZnxDftApply, VecZnxFillUniform, VecZnxIdftApplyConsume, VecZnxNormalize, VecZnxNormalizeInplace,
6        VecZnxNormalizeTmpBytes, VecZnxSub, VecZnxSubABInplace, VecZnxSwitchRing,
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>, basek: usize, k: usize, rank: usize) -> usize
19    where
20        Module<B>: SvpPPolAllocBytes + VecZnxNormalizeTmpBytes + VecZnxDftAllocBytes + VecZnxNormalizeTmpBytes,
21    {
22        GGLWESwitchingKey::encrypt_sk_scratch_space(module, basek, k, rank, rank) + GLWESecret::bytes_of(module.n(), rank)
23    }
24
25    pub fn encrypt_pk_scratch_space<B: Backend>(module: &Module<B>, _basek: usize, _k: usize, _rank: usize) -> usize {
26        GGLWESwitchingKey::encrypt_pk_scratch_space(module, _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        scratch: &mut Scratch<B>,
40    ) where
41        Module<B>: VecZnxAddScalarInplace
42            + VecZnxDftAllocBytes
43            + VecZnxBigNormalize<B>
44            + VecZnxDftApply<B>
45            + SvpApplyDftToDftInplace<B>
46            + VecZnxIdftApplyConsume<B>
47            + VecZnxNormalizeTmpBytes
48            + VecZnxFillUniform
49            + VecZnxSubABInplace
50            + VecZnxAddInplace
51            + VecZnxNormalizeInplace<B>
52            + VecZnxAddNormal
53            + VecZnxNormalize<B>
54            + VecZnxSub
55            + SvpPrepare<B>
56            + VecZnxSwitchRing
57            + SvpPPolAllocBytes
58            + VecZnxAutomorphism,
59        Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx + TakeScalarZnx + TakeGLWESecretPrepared<B>,
60    {
61        #[cfg(debug_assertions)]
62        {
63            use crate::layouts::Infos;
64
65            assert_eq!(self.n(), sk.n());
66            assert_eq!(self.rank_out(), self.rank_in());
67            assert_eq!(sk.rank(), self.rank());
68            assert!(
69                scratch.available()
70                    >= GGLWEAutomorphismKey::encrypt_sk_scratch_space(module, self.basek(), self.k(), self.rank()),
71                "scratch.available(): {} < AutomorphismKey::encrypt_sk_scratch_space(module, self.rank()={}, self.size()={}): {}",
72                scratch.available(),
73                self.rank(),
74                self.size(),
75                GGLWEAutomorphismKey::encrypt_sk_scratch_space(module, self.basek(), self.k(), self.rank())
76            )
77        }
78
79        let (mut sk_out, scratch_1) = scratch.take_glwe_secret(sk.n(), sk.rank());
80
81        {
82            (0..self.rank()).for_each(|i| {
83                module.vec_znx_automorphism(
84                    module.galois_element_inv(p),
85                    &mut sk_out.data.as_vec_znx_mut(),
86                    i,
87                    &sk.data.as_vec_znx(),
88                    i,
89                );
90            });
91        }
92
93        self.key
94            .encrypt_sk(module, sk, &sk_out, source_xa, source_xe, scratch_1);
95
96        self.p = p;
97    }
98}
poulpy_core/encryption/gglwe_atk.rs

poulpy_core/encryption/
gglwe_atk.rs
