poulpy-ckks 0.6.0

A backend-agnostic crate implementing the CKKS FHE scheme
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133

#![allow(clippy::too_many_arguments)]

use crate::default::encryption::CKKSEncryptionDefault;

use anyhow::Result;
use poulpy_core::{
    EncryptionInfos,
    layouts::{GLWEInfos, GLWESecretPreparedToBackendRef, LWEInfos},
    oep::{DecryptionDefault, EncryptionDefault},
};
use poulpy_hal::{
    api::{VecZnxLshBackend, VecZnxLshTmpBytes, VecZnxRshAddIntoBackend, VecZnxRshBackend, VecZnxRshTmpBytes},
    layouts::{Backend, HostBackend, HostDataMut, HostDataRef, Module, ScratchArena},
    oep::{HalSvpImpl, HalVecZnxBigImpl, HalVecZnxDftImpl, HalVecZnxImpl},
    source::Source,
};

use crate::{CKKSInfos, GLWEToBackendMut, GLWEToBackendRef, SetCKKSInfos, default::plaintext::CKKSPlaintextDefault};

/// # Safety
///
/// Implementations must satisfy the contracts of all trait methods, including
/// any HAL-level invariants (alignment, layout, scratch sizing) implied by the
/// associated method signatures.
pub unsafe trait CKKSEncryptionImpl<BE: Backend>: Backend {
    fn ckks_encrypt_sk_tmp_bytes<A>(module: &Module<BE>, ct_infos: &A) -> usize
    where
        A: GLWEInfos + CKKSInfos;

    fn ckks_encrypt_sk<Dct, S, E, Pt>(
        module: &Module<BE>,
        ct: &mut Dct,
        pt: &Pt,
        sk: &S,
        enc_infos: &E,
        source_xa: &mut Source,
        source_xe: &mut Source,
        scratch: &mut ScratchArena<'_, BE>,
    ) -> Result<()>
    where
        E: EncryptionInfos,
        Pt: GLWEToBackendRef<BE> + LWEInfos + CKKSInfos,
        Dct: GLWEToBackendMut<BE> + LWEInfos + CKKSInfos + SetCKKSInfos,
        S: GLWESecretPreparedToBackendRef<BE>;

    fn ckks_decrypt_tmp_bytes<A>(module: &Module<BE>, ct_infos: &A) -> usize
    where
        A: GLWEInfos + CKKSInfos;

    fn ckks_decrypt<S, Dct, Pt>(
        module: &Module<BE>,
        pt: &mut Pt,
        ct: &Dct,
        sk: &S,
        scratch: &mut ScratchArena<'_, BE>,
    ) -> Result<()>
    where
        Pt: GLWEToBackendMut<BE> + LWEInfos + CKKSInfos + SetCKKSInfos,
        Dct: GLWEToBackendRef<BE> + GLWEInfos + LWEInfos + CKKSInfos,
        S: GLWESecretPreparedToBackendRef<BE> + GLWEInfos;
}

unsafe impl<BE: Backend> CKKSEncryptionImpl<BE> for BE
where
    BE: HalVecZnxImpl<BE> + HalVecZnxBigImpl<BE> + HalVecZnxDftImpl<BE> + HalSvpImpl<BE> + HostBackend,
    Module<BE>: CKKSEncryptionDefault<BE>
        + CKKSPlaintextDefault<BE>
        + EncryptionDefault<BE>
        + DecryptionDefault<BE>
        + VecZnxRshAddIntoBackend<BE>
        + VecZnxRshTmpBytes
        + VecZnxLshBackend<BE>
        + VecZnxLshTmpBytes
        + VecZnxRshBackend<BE>,
    for<'a> BE::BufMut<'a>: HostDataMut,
    for<'a> BE::BufRef<'a>: HostDataRef,
{
    fn ckks_encrypt_sk_tmp_bytes<A>(module: &Module<BE>, ct_infos: &A) -> usize
    where
        A: GLWEInfos + CKKSInfos,
    {
        module.ckks_encrypt_sk_tmp_bytes_default(ct_infos)
    }

    fn ckks_encrypt_sk<Dct, S, E, Pt>(
        module: &Module<BE>,
        ct: &mut Dct,
        pt: &Pt,
        sk: &S,
        enc_infos: &E,
        source_xa: &mut Source,
        source_xe: &mut Source,
        scratch: &mut ScratchArena<'_, BE>,
    ) -> Result<()>
    where
        E: EncryptionInfos,
        Pt: GLWEToBackendRef<BE> + LWEInfos + CKKSInfos,
        Dct: GLWEToBackendMut<BE> + LWEInfos + CKKSInfos + SetCKKSInfos,
        S: GLWESecretPreparedToBackendRef<BE>,
    {
        module.ckks_encrypt_sk_default(ct, pt, sk, enc_infos, source_xa, source_xe, scratch)
    }

    fn ckks_decrypt_tmp_bytes<A>(module: &Module<BE>, ct_infos: &A) -> usize
    where
        A: GLWEInfos + CKKSInfos,
    {
        module.ckks_decrypt_tmp_bytes_default(ct_infos)
    }

    fn ckks_decrypt<S, Dct, Pt>(
        module: &Module<BE>,
        pt: &mut Pt,
        ct: &Dct,
        sk: &S,
        scratch: &mut ScratchArena<'_, BE>,
    ) -> Result<()>
    where
        Pt: GLWEToBackendMut<BE> + LWEInfos + CKKSInfos + SetCKKSInfos,
        Dct: GLWEToBackendRef<BE> + GLWEInfos + LWEInfos + CKKSInfos,
        S: GLWESecretPreparedToBackendRef<BE> + GLWEInfos,
    {
        module.ckks_decrypt_default(pt, ct, sk, scratch)
    }
}

#[macro_export]
macro_rules! impl_ckks_encryption_defaults {
    ($be:ty) => {
        impl $crate::default::encryption::CKKSEncryptionDefault<$be> for ::poulpy_hal::layouts::Module<$be> {}
    };
}
pub use crate::impl_ckks_encryption_defaults;