poulpy_core/encryption/
gglwe_to_ggsw_key.rs

1use poulpy_hal::{
2    api::{ModuleN, ScratchTakeBasic, VecZnxCopy},
3    layouts::{Backend, DataMut, Module, Scratch},
4    source::Source,
5};
6
7use crate::{
8    GGLWEEncryptSk, GetDistribution, ScratchTakeCore,
9    layouts::{
10        GGLWEInfos, GGLWEToGGSWKey, GGLWEToGGSWKeyToMut, GLWEInfos, GLWESecret, GLWESecretTensor, GLWESecretTensorFactory,
11        GLWESecretToRef,
12        prepared::{GLWESecretPrepared, GLWESecretPreparedFactory},
13    },
14};
15
16impl GGLWEToGGSWKey<Vec<u8>> {
17    pub fn encrypt_sk_tmp_bytes<M, A, BE: Backend>(module: &M, infos: &A) -> usize
18    where
19        A: GGLWEInfos,
20        M: GGLWEToGGSWKeyEncryptSk<BE>,
21    {
22        module.gglwe_to_ggsw_key_encrypt_sk_tmp_bytes(infos)
23    }
24}
25
26impl<DataSelf: DataMut> GGLWEToGGSWKey<DataSelf> {
27    pub fn encrypt_sk<M, S, BE: Backend>(
28        &mut self,
29        module: &M,
30        sk: &S,
31        source_xa: &mut Source,
32        source_xe: &mut Source,
33        scratch: &mut Scratch<BE>,
34    ) where
35        M: GGLWEToGGSWKeyEncryptSk<BE>,
36        S: GLWESecretToRef + GetDistribution + GLWEInfos,
37        Scratch<BE>: ScratchTakeCore<BE>,
38    {
39        module.gglwe_to_ggsw_key_encrypt_sk(self, sk, source_xa, source_xe, scratch);
40    }
41}
42
43pub trait GGLWEToGGSWKeyEncryptSk<BE: Backend> {
44    fn gglwe_to_ggsw_key_encrypt_sk_tmp_bytes<A>(&self, infos: &A) -> usize
45    where
46        A: GGLWEInfos;
47
48    fn gglwe_to_ggsw_key_encrypt_sk<R, S>(
49        &self,
50        res: &mut R,
51        sk: &S,
52        source_xa: &mut Source,
53        source_xe: &mut Source,
54        scratch: &mut Scratch<BE>,
55    ) where
56        R: GGLWEToGGSWKeyToMut,
57        S: GLWESecretToRef + GetDistribution + GLWEInfos;
58}
59
60impl<BE: Backend> GGLWEToGGSWKeyEncryptSk<BE> for Module<BE>
61where
62    Self: ModuleN + GGLWEEncryptSk<BE> + GLWESecretTensorFactory<BE> + GLWESecretPreparedFactory<BE> + VecZnxCopy,
63    Scratch<BE>: ScratchTakeCore<BE>,
64{
65    fn gglwe_to_ggsw_key_encrypt_sk_tmp_bytes<A>(&self, infos: &A) -> usize
66    where
67        A: GGLWEInfos,
68    {
69        let sk_prepared: usize = GLWESecretPrepared::bytes_of(self, infos.rank());
70        let sk_tensor: usize = GLWESecretTensor::bytes_of_from_infos(infos);
71        let gglwe_encrypt: usize = self.gglwe_encrypt_sk_tmp_bytes(infos);
72        let sk_ij = GLWESecret::bytes_of(self.n().into(), infos.rank());
73        (sk_prepared + sk_tensor + sk_ij) + gglwe_encrypt.max(self.glwe_secret_tensor_prepare_tmp_bytes(infos.rank()))
74    }
75
76    fn gglwe_to_ggsw_key_encrypt_sk<R, S>(
77        &self,
78        res: &mut R,
79        sk: &S,
80        source_xa: &mut Source,
81        source_xe: &mut Source,
82        scratch: &mut Scratch<BE>,
83    ) where
84        R: GGLWEToGGSWKeyToMut,
85        S: GLWESecretToRef + GetDistribution + GLWEInfos,
86    {
87        let res: &mut GGLWEToGGSWKey<&mut [u8]> = &mut res.to_mut();
88
89        let rank: usize = res.rank_out().as_usize();
90
91        let (mut sk_prepared, scratch_1) = scratch.take_glwe_secret_prepared(self, res.rank());
92        let (mut sk_tensor, scratch_2) = scratch_1.take_glwe_secret_tensor(self.n().into(), res.rank());
93        sk_prepared.prepare(self, sk);
94        sk_tensor.prepare(self, sk, scratch_2);
95
96        let (mut sk_ij, scratch_3) = scratch_2.take_scalar_znx(self.n(), rank);
97
98        for i in 0..rank {
99            for j in 0..rank {
100                self.vec_znx_copy(
101                    &mut sk_ij.as_vec_znx_mut(),
102                    j,
103                    &sk_tensor.at(i, j).as_vec_znx(),
104                    0,
105                );
106            }
107
108            res.at_mut(i)
109                .encrypt_sk(self, &sk_ij, &sk_prepared, source_xa, source_xe, scratch_3);
110        }
111    }
112}
poulpy_core/encryption/gglwe_to_ggsw_key.rs

poulpy_core/encryption/
gglwe_to_ggsw_key.rs
