1use backend::hal::{
  2    api::{
  3        ScratchOwnedAlloc, ScratchOwnedBorrow, VecZnxAddScalarInplace, VecZnxBigAlloc, VecZnxCopy, VecZnxDftAlloc, VecZnxStd,
  4        VecZnxSubScalarInplace, VecZnxSwithcDegree,
  5    },
  6    layouts::{Backend, Module, ScratchOwned, VecZnxDft},
  7    oep::{
  8        ScratchAvailableImpl, ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl, TakeScalarZnxImpl, TakeSvpPPolImpl,
  9        TakeVecZnxBigImpl, TakeVecZnxDftImpl, TakeVecZnxImpl, VecZnxBigAllocBytesImpl, VecZnxDftAllocBytesImpl,
 10    },
 11};
 12use sampling::source::Source;
 13
 14use crate::{
 15    GGLWEEncryptSkFamily, GGLWEExecLayoutFamily, GLWEDecryptFamily, GLWEPlaintext, GLWESecret, GLWESecretExec, GLWETensorKey,
 16    GLWETensorKeyCompressed, GLWETensorKeyEncryptSkFamily, Infos,
 17};
 18
 19pub(crate) trait TestModuleFamily<B: Backend> = GGLWEEncryptSkFamily<B>
 20    + GLWEDecryptFamily<B>
 21    + VecZnxSwithcDegree
 22    + VecZnxAddScalarInplace
 23    + VecZnxStd
 24    + VecZnxSubScalarInplace;
 25
 26pub(crate) trait TestScratchFamily<B: Backend> = TakeVecZnxDftImpl<B>
 27    + TakeVecZnxBigImpl<B>
 28    + TakeSvpPPolImpl<B>
 29    + ScratchOwnedAllocImpl<B>
 30    + ScratchOwnedBorrowImpl<B>
 31    + ScratchAvailableImpl<B>
 32    + TakeScalarZnxImpl<B>
 33    + TakeVecZnxImpl<B>
 34    + VecZnxDftAllocBytesImpl<B>
 35    + VecZnxBigAllocBytesImpl<B>
 36    + TakeSvpPPolImpl<B>;
 37
 38pub(crate) fn test_tensor_key_encrypt_sk<B: Backend>(module: &Module<B>, basek: usize, k: usize, sigma: f64, rank: usize)
 39where
 40    Module<B>: TestModuleFamily<B>
 41        + GGLWEExecLayoutFamily<B>
 42        + GLWETensorKeyEncryptSkFamily<B>
 43        + GLWEDecryptFamily<B>
 44        + VecZnxDftAlloc<B>
 45        + VecZnxBigAlloc<B>,
 46    B: TestScratchFamily<B>,
 47{
 48    let n: usize = module.n();
 49    let rows: usize = k / basek;
 50
 51    let mut tensor_key: GLWETensorKey<Vec<u8>> = GLWETensorKey::alloc(n, basek, k, rows, 1, rank);
 52
 53    let mut source_xs: Source = Source::new([0u8; 32]);
 54    let mut source_xe: Source = Source::new([0u8; 32]);
 55    let mut source_xa: Source = Source::new([0u8; 32]);
 56
 57    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(GLWETensorKey::encrypt_sk_scratch_space(
 58        module,
 59        n,
 60        basek,
 61        tensor_key.k(),
 62        rank,
 63    ));
 64
 65    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
 66    sk.fill_ternary_prob(0.5, &mut source_xs);
 67    let mut sk_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk);
 68    sk_exec.prepare(module, &sk);
 69
 70    tensor_key.encrypt_sk(
 71        module,
 72        &sk,
 73        &mut source_xa,
 74        &mut source_xe,
 75        sigma,
 76        scratch.borrow(),
 77    );
 78
 79    let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(n, basek, k);
 80
 81    let mut sk_ij_dft = module.vec_znx_dft_alloc(n, 1, 1);
 82    let mut sk_ij_big = module.vec_znx_big_alloc(n, 1, 1);
 83    let mut sk_ij: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, 1);
 84    let mut sk_dft: VecZnxDft<Vec<u8>, B> = module.vec_znx_dft_alloc(n, rank, 1);
 85
 86    (0..rank).for_each(|i| {
 87        module.vec_znx_dft_from_vec_znx(1, 0, &mut sk_dft, i, &sk.data.as_vec_znx(), i);
 88    });
 89
 90    (0..rank).for_each(|i| {
 91        (0..rank).for_each(|j| {
 92            module.svp_apply(&mut sk_ij_dft, 0, &sk_exec.data, j, &sk_dft, i);
 93            module.vec_znx_dft_to_vec_znx_big_tmp_a(&mut sk_ij_big, 0, &mut sk_ij_dft, 0);
 94            module.vec_znx_big_normalize(
 95                basek,
 96                &mut sk_ij.data.as_vec_znx_mut(),
 97                0,
 98                &sk_ij_big,
 99                0,
100                scratch.borrow(),
101            );
102            (0..tensor_key.rank_in()).for_each(|col_i| {
103                (0..tensor_key.rows()).for_each(|row_i| {
104                    tensor_key
105                        .at(i, j)
106                        .at(row_i, col_i)
107                        .decrypt(module, &mut pt, &sk_exec, scratch.borrow());
108
109                    module.vec_znx_sub_scalar_inplace(&mut pt.data, 0, row_i, &sk_ij.data, col_i);
110
111                    let std_pt: f64 = module.vec_znx_std(basek, &pt.data, 0) * (k as f64).exp2();
112                    assert!((sigma - std_pt).abs() <= 0.5, "{} {}", sigma, std_pt);
113                });
114            });
115        })
116    })
117}
118
119pub(crate) fn test_tensor_key_encrypt_sk_compressed<B: Backend>(
120    module: &Module<B>,
121    basek: usize,
122    k: usize,
123    sigma: f64,
124    rank: usize,
125) where
126    Module<B>: TestModuleFamily<B>
127        + GGLWEExecLayoutFamily<B>
128        + GLWETensorKeyEncryptSkFamily<B>
129        + GLWEDecryptFamily<B>
130        + VecZnxDftAlloc<B>
131        + VecZnxBigAlloc<B>
132        + VecZnxCopy,
133    B: TestScratchFamily<B>,
134{
135    let n: usize = module.n();
136    let rows: usize = k / basek;
137
138    let mut tensor_key_compressed: GLWETensorKeyCompressed<Vec<u8>> = GLWETensorKeyCompressed::alloc(n, basek, k, rows, 1, rank);
139
140    let mut source_xs: Source = Source::new([0u8; 32]);
141    let mut source_xe: Source = Source::new([0u8; 32]);
142
143    let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(GLWETensorKeyCompressed::encrypt_sk_scratch_space(
144        module,
145        n,
146        basek,
147        tensor_key_compressed.k(),
148        rank,
149    ));
150
151    let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
152    sk.fill_ternary_prob(0.5, &mut source_xs);
153    let mut sk_exec: GLWESecretExec<Vec<u8>, B> = GLWESecretExec::from(module, &sk);
154    sk_exec.prepare(module, &sk);
155
156    let seed_xa: [u8; 32] = [1u8; 32];
157
158    tensor_key_compressed.encrypt_sk(
159        module,
160        &sk,
161        seed_xa,
162        &mut source_xe,
163        sigma,
164        scratch.borrow(),
165    );
166
167    let mut tensor_key: GLWETensorKey<Vec<u8>> = GLWETensorKey::alloc(n, basek, k, rows, 1, rank);
168    tensor_key.decompress(module, &tensor_key_compressed);
169
170    let mut pt: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(n, basek, k);
171
172    let mut sk_ij_dft = module.vec_znx_dft_alloc(n, 1, 1);
173    let mut sk_ij_big = module.vec_znx_big_alloc(n, 1, 1);
174    let mut sk_ij: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, 1);
175    let mut sk_dft: VecZnxDft<Vec<u8>, B> = module.vec_znx_dft_alloc(n, rank, 1);
176
177    (0..rank).for_each(|i| {
178        module.vec_znx_dft_from_vec_znx(1, 0, &mut sk_dft, i, &sk.data.as_vec_znx(), i);
179    });
180
181    (0..rank).for_each(|i| {
182        (0..rank).for_each(|j| {
183            module.svp_apply(&mut sk_ij_dft, 0, &sk_exec.data, j, &sk_dft, i);
184            module.vec_znx_dft_to_vec_znx_big_tmp_a(&mut sk_ij_big, 0, &mut sk_ij_dft, 0);
185            module.vec_znx_big_normalize(
186                basek,
187                &mut sk_ij.data.as_vec_znx_mut(),
188                0,
189                &sk_ij_big,
190                0,
191                scratch.borrow(),
192            );
193            (0..tensor_key.rank_in()).for_each(|col_i| {
194                (0..tensor_key.rows()).for_each(|row_i| {
195                    tensor_key
196                        .at(i, j)
197                        .at(row_i, col_i)
198                        .decrypt(module, &mut pt, &sk_exec, scratch.borrow());
199
200                    module.vec_znx_sub_scalar_inplace(&mut pt.data, 0, row_i, &sk_ij.data, col_i);
201
202                    let std_pt: f64 = module.vec_znx_std(basek, &pt.data, 0) * (k as f64).exp2();
203                    assert!((sigma - std_pt).abs() <= 0.5, "{} {}", sigma, std_pt);
204                });
205            });
206        })
207    })
208}