1use std::time::Instant;
  2
  3use backend::{Encoding, FFT64, Module, ScratchOwned, Stats, VecZnxOps, ZnxView};
  4use sampling::source::Source;
  5
  6use crate::{
  7    FourierGLWESecret, GLWECiphertext, GLWEPlaintext, GLWESecret, Infos, LWECiphertext, LWESecret,
  8    blind_rotation::{
  9        ccgi::{cggi_blind_rotate, cggi_blind_rotate_scratch_space, mod_switch_2n},
 10        key::BlindRotationKeyCGGI,
 11        lut::LookUpTable,
 12    },
 13    lwe::{LWEPlaintext, ciphertext::LWECiphertextToRef},
 14};
 15
 16#[test]
 17fn blind_rotation() {
 18    let module: Module<FFT64> = Module::<FFT64>::new(2048);
 19    let basek: usize = 20;
 20
 21    let n_lwe: usize = 1071;
 22
 23    let k_lwe: usize = 22;
 24    let k_brk: usize = 60;
 25    let rows_brk: usize = 2;
 26    let k_lut: usize = 60;
 27    let rank: usize = 1;
 28    let block_size: usize = 7;
 29
 30    let message_modulus: usize = 64;
 31
 32    let mut source_xs: Source = Source::new([0u8; 32]);
 33    let mut source_xe: Source = Source::new([0u8; 32]);
 34    let mut source_xa: Source = Source::new([0u8; 32]);
 35
 36    let mut sk_glwe: GLWESecret<Vec<u8>> = GLWESecret::alloc(&module, rank);
 37    sk_glwe.fill_ternary_prob(0.5, &mut source_xs);
 38    let sk_glwe_dft: FourierGLWESecret<Vec<u8>, FFT64> = FourierGLWESecret::from(&module, &sk_glwe);
 39
 40    let mut sk_lwe: LWESecret<Vec<u8>> = LWESecret::alloc(n_lwe);
 41    sk_lwe.fill_binary_block(block_size, &mut source_xs);
 42
 43    let mut scratch: ScratchOwned = ScratchOwned::new(
 44        BlindRotationKeyCGGI::generate_from_sk_scratch_space(&module, basek, k_brk, rank)
 45            | cggi_blind_rotate_scratch_space(&module, basek, k_lut, k_brk, rows_brk, rank),
 46    );
 47
 48    let start: Instant = Instant::now();
 49    let mut brk: BlindRotationKeyCGGI<FFT64> = BlindRotationKeyCGGI::allocate(&module, n_lwe, basek, k_brk, rows_brk, rank);
 50
 51    brk.generate_from_sk(
 52        &module,
 53        &sk_glwe_dft,
 54        &sk_lwe,
 55        &mut source_xa,
 56        &mut source_xe,
 57        3.2,
 58        scratch.borrow(),
 59    );
 60
 61    let duration: std::time::Duration = start.elapsed();
 62    println!("brk-gen: {} ms", duration.as_millis());
 63
 64    let mut lwe: LWECiphertext<Vec<u8>> = LWECiphertext::alloc(n_lwe, basek, k_lwe);
 65
 66    let mut pt_lwe: LWEPlaintext<Vec<u8>> = LWEPlaintext::alloc(basek, k_lwe);
 67
 68    let x: i64 = 0;
 69    let bits: usize = 6;
 70
 71    pt_lwe.data.encode_coeff_i64(0, basek, bits, 0, x, bits);
 72
 73    println!("{}", pt_lwe.data);
 74
 75    lwe.encrypt_sk(&pt_lwe, &sk_lwe, &mut source_xa, &mut source_xe, 3.2);
 76
 77    lwe.decrypt(&mut pt_lwe, &sk_lwe);
 78
 79    println!("{}", pt_lwe.data);
 80
 81    fn lut_fn(x: i64) -> i64 {
 82        2 * x + 1
 83    }
 84
 85    let mut lut: LookUpTable = LookUpTable::alloc(&module, basek, k_lut, 1);
 86    lut.set(&module, lut_fn, message_modulus);
 87
 88    let mut res: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(&module, basek, k_lut, rank);
 89
 90    let start: Instant = Instant::now();
 91    (0..1).for_each(|_| {
 92        cggi_blind_rotate(&module, &mut res, &lwe, &lut, &brk, scratch.borrow());
 93    });
 94
 95    let duration: std::time::Duration = start.elapsed();
 96    println!("blind-rotate: {} ms", duration.as_millis());
 97
 98    let mut pt_have: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(&module, basek, k_lut);
 99
100    res.decrypt(&module, &mut pt_have, &sk_glwe_dft, scratch.borrow());
101
102    println!("pt_have: {}", pt_have.data);
103
104    let mut lwe_2n: Vec<i64> = vec![0i64; lwe.n() + 1]; // TODO: from scratch space
105
106    mod_switch_2n(&module, &mut lwe_2n, &lwe.to_ref());
107
108    let pt_want: i64 = (lwe_2n[0]
109        + lwe_2n[1..]
110            .iter()
111            .zip(sk_lwe.data.at(0, 0))
112            .map(|(x, y)| x * y)
113            .sum::<i64>())
114        % (module.n() as i64 * 2);
115
116    module.vec_znx_rotate_inplace(pt_want, &mut lut.data[0], 0);
117
118    println!("pt_want: {}", lut.data[0]);
119
120    module.vec_znx_sub_ab_inplace(&mut lut.data[0], 0, &pt_have.data, 0);
121
122    let noise: f64 = lut.data[0].std(0, basek);
123
124    println!("noise: {}", noise);
125}