1use std::collections::HashMap;
  2
  3use poulpy_hal::{
  4    api::{
  5        ScratchOwnedAlloc, ScratchOwnedBorrow, SvpApplyDftToDftInplace, SvpPPolAlloc, SvpPPolBytesOf, SvpPrepare,
  6        VecZnxAddInplace, VecZnxAddNormal, VecZnxAddScalarInplace, VecZnxAutomorphism, VecZnxBigAddInplace,
  7        VecZnxBigAddSmallInplace, VecZnxBigAutomorphismInplace, VecZnxBigBytesOf, VecZnxBigNormalize, VecZnxBigNormalizeTmpBytes,
  8        VecZnxBigSubSmallNegateInplace, VecZnxCopy, VecZnxDftApply, VecZnxDftBytesOf, VecZnxFillUniform, VecZnxIdftApplyConsume,
  9        VecZnxNormalize, VecZnxNormalizeInplace, VecZnxNormalizeTmpBytes, VecZnxRotateInplace, VecZnxRshInplace, VecZnxSub,
 10        VecZnxSubInplace, VecZnxSwitchRing, VmpApplyDftToDft, VmpApplyDftToDftAdd, VmpApplyDftToDftTmpBytes, VmpPMatAlloc,
 11        VmpPrepare,
 12    },
 13    layouts::{Backend, Module, ScratchOwned, ZnxView, ZnxViewMut},
 14    oep::{
 15        ScratchAvailableImpl, ScratchOwnedAllocImpl, ScratchOwnedBorrowImpl, TakeScalarZnxImpl, TakeSvpPPolImpl,
 16        TakeVecZnxBigImpl, TakeVecZnxDftImpl, TakeVecZnxImpl,
 17    },
 18    source::Source,
 19};
 20
 21use crate::{
 22    encryption::SIGMA,
 23    layouts::{
 24        AutomorphismKey, AutomorphismKeyLayout, GLWE, GLWELayout, GLWEPlaintext, GLWESecret, LWEInfos,
 25        prepared::{AutomorphismKeyPrepared, GLWESecretPrepared, PrepareAlloc},
 26    },
 27    noise::var_noise_gglwe_product,
 28};
 29
 30pub fn test_glwe_trace_inplace<B>(module: &Module<B>)
 31where
 32    Module<B>: VecZnxDftBytesOf
 33        + VecZnxAutomorphism
 34        + VecZnxBigAutomorphismInplace<B>
 35        + VecZnxBigSubSmallNegateInplace<B>
 36        + VecZnxRshInplace<B>
 37        + VecZnxRotateInplace<B>
 38        + VecZnxBigNormalize<B>
 39        + VecZnxDftApply<B>
 40        + SvpApplyDftToDftInplace<B>
 41        + VecZnxIdftApplyConsume<B>
 42        + VecZnxFillUniform
 43        + VecZnxSubInplace
 44        + VecZnxAddInplace
 45        + VecZnxNormalizeInplace<B>
 46        + VecZnxAddNormal
 47        + VecZnxNormalize<B>
 48        + VecZnxSub
 49        + SvpPrepare<B>
 50        + SvpPPolBytesOf
 51        + SvpPPolAlloc<B>
 52        + VecZnxBigBytesOf
 53        + VecZnxBigAddInplace<B>
 54        + VecZnxBigAddSmallInplace<B>
 55        + VecZnxNormalizeTmpBytes
 56        + VecZnxAddScalarInplace
 57        + VmpPMatAlloc<B>
 58        + VmpPrepare<B>
 59        + VmpApplyDftToDftTmpBytes
 60        + VmpApplyDftToDft<B>
 61        + VmpApplyDftToDftAdd<B>
 62        + VecZnxBigNormalizeTmpBytes
 63        + VecZnxSwitchRing
 64        + VecZnxCopy,
 65    B: Backend
 66        + TakeVecZnxDftImpl<B>
 67        + TakeVecZnxBigImpl<B>
 68        + TakeSvpPPolImpl<B>
 69        + ScratchOwnedAllocImpl<B>
 70        + ScratchOwnedBorrowImpl<B>
 71        + ScratchAvailableImpl<B>
 72        + TakeScalarZnxImpl<B>
 73        + TakeVecZnxImpl<B>,
 74{
 75    let base2k: usize = 8;
 76    let k: usize = 54;
 77
 78    for rank in 1_usize..3 {
 79        let n: usize = module.n();
 80        let k_autokey: usize = k + base2k;
 81
 82        let dsize: usize = 1;
 83        let dnum: usize = k.div_ceil(base2k * dsize);
 84
 85        let glwe_out_infos: GLWELayout = GLWELayout {
 86            n: n.into(),
 87            base2k: base2k.into(),
 88            k: k.into(),
 89            rank: rank.into(),
 90        };
 91
 92        let key_infos: AutomorphismKeyLayout = AutomorphismKeyLayout {
 93            n: n.into(),
 94            base2k: base2k.into(),
 95            k: k_autokey.into(),
 96            rank: rank.into(),
 97            dsize: dsize.into(),
 98            dnum: dnum.into(),
 99        };
100
101        let mut glwe_out: GLWE<Vec<u8>> = GLWE::alloc_from_infos(&glwe_out_infos);
102        let mut pt_want: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc_from_infos(&glwe_out_infos);
103        let mut pt_have: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc_from_infos(&glwe_out_infos);
104
105        let mut source_xs: Source = Source::new([0u8; 32]);
106        let mut source_xe: Source = Source::new([0u8; 32]);
107        let mut source_xa: Source = Source::new([0u8; 32]);
108
109        let mut scratch: ScratchOwned<B> = ScratchOwned::alloc(
110            GLWE::encrypt_sk_scratch_space(module, &glwe_out_infos)
111                | GLWE::decrypt_scratch_space(module, &glwe_out_infos)
112                | AutomorphismKey::encrypt_sk_scratch_space(module, &key_infos)
113                | GLWE::trace_inplace_scratch_space(module, &glwe_out_infos, &key_infos),
114        );
115
116        let mut sk: GLWESecret<Vec<u8>> = GLWESecret::alloc_from_infos(&glwe_out_infos);
117        sk.fill_ternary_prob(0.5, &mut source_xs);
118        let sk_dft: GLWESecretPrepared<Vec<u8>, B> = sk.prepare_alloc(module, scratch.borrow());
119
120        let mut data_want: Vec<i64> = vec![0i64; n];
121
122        data_want
123            .iter_mut()
124            .for_each(|x| *x = source_xa.next_i64() & 0xFF);
125
126        module.vec_znx_fill_uniform(base2k, &mut pt_have.data, 0, &mut source_xa);
127
128        glwe_out.encrypt_sk(
129            module,
130            &pt_have,
131            &sk_dft,
132            &mut source_xa,
133            &mut source_xe,
134            scratch.borrow(),
135        );
136
137        let mut auto_keys: HashMap<i64, AutomorphismKeyPrepared<Vec<u8>, B>> = HashMap::new();
138        let gal_els: Vec<i64> = GLWE::trace_galois_elements(module);
139        let mut tmp: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc_from_infos(&key_infos);
140        gal_els.iter().for_each(|gal_el| {
141            tmp.encrypt_sk(
142                module,
143                *gal_el,
144                &sk,
145                &mut source_xa,
146                &mut source_xe,
147                scratch.borrow(),
148            );
149            let atk_prepared: AutomorphismKeyPrepared<Vec<u8>, B> = tmp.prepare_alloc(module, scratch.borrow());
150            auto_keys.insert(*gal_el, atk_prepared);
151        });
152
153        glwe_out.trace_inplace(module, 0, 5, &auto_keys, scratch.borrow());
154        glwe_out.trace_inplace(module, 5, module.log_n(), &auto_keys, scratch.borrow());
155
156        (0..pt_want.size()).for_each(|i| pt_want.data.at_mut(0, i)[0] = pt_have.data.at(0, i)[0]);
157
158        glwe_out.decrypt(module, &mut pt_have, &sk_dft, scratch.borrow());
159
160        module.vec_znx_sub_inplace(&mut pt_want.data, 0, &pt_have.data, 0);
161        module.vec_znx_normalize_inplace(base2k, &mut pt_want.data, 0, scratch.borrow());
162
163        let noise_have: f64 = pt_want.std().log2();
164
165        let mut noise_want: f64 = var_noise_gglwe_product(
166            n as f64,
167            base2k,
168            0.5,
169            0.5,
170            1.0 / 12.0,
171            SIGMA * SIGMA,
172            0.0,
173            rank as f64,
174            k,
175            k_autokey,
176        );
177        noise_want += SIGMA * SIGMA * (-2.0 * (k) as f64).exp2();
178        noise_want += n as f64 * 1.0 / 12.0 * 0.5 * rank as f64 * (-2.0 * (k) as f64).exp2();
179        noise_want = noise_want.sqrt().log2();
180
181        assert!(
182            (noise_have - noise_want).abs() < 1.0,
183            "{noise_have} > {noise_want}"
184        );
185    }
186}