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working block binary BR

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This commit is contained in:
Jean-Philippe Bossuat
2025-06-18 22:23:32 +02:00
parent 829b8be610
commit 6a006b442a
3 changed files with 53 additions and 26 deletions
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26
core/src/blind_rotation/ccgi.rs
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@@ -4,8 +4,7 @@ use backend::{MatZnxDftOps, MatZnxDftScratch, Module, ScalarZnxDftOps, Scratch,
use itertools::izip;
use crate::{
GGSWCiphertext, GLWECiphertext, GLWECiphertextToMut, GLWECiphertextToRef, GLWEPlaintext, Infos, LWECiphertext,
ScratchCore, blind_rotation::key::BlindRotationKeyCGGI, lwe::ciphertext::LWECiphertextToRef,
blind_rotation::key::BlindRotationKeyCGGI, lwe::ciphertext::LWECiphertextToRef, FourierGLWESecret, GGSWCiphertext, GLWECiphertext, GLWECiphertextToMut, GLWECiphertextToRef, GLWEPlaintext, GLWESecret, Infos, LWECiphertext, LWESecret, ScratchCore
};
pub fn cggi_blind_rotate_scratch_space(
@@ -34,8 +33,7 @@ pub fn cggi_blind_rotate<DataRes, DataIn, DataLUT>(
DataIn: AsRef<[u8]>,
DataLUT: AsRef<[u8]>,
{
println!("{}", lwe.n());
let basek = res.basek();
let mut lwe_2n: Vec<i64> = vec![0i64; lwe.n() + 1]; // TODO: from scratch space
let mut out_mut: GLWECiphertext<&mut [u8]> = res.to_mut();
@@ -60,7 +58,7 @@ pub fn cggi_blind_rotate<DataRes, DataIn, DataLUT>(
let (mut acc_dft, scratch1) = scratch.tmp_glwe_fourier(module, brk.basek(), out_mut.k(), out_mut.rank());
let (mut acc_add_dft, scratch2) = scratch1.tmp_glwe_fourier(module, brk.basek(), out_mut.k(), out_mut.rank());
let (mut vmp_res, scratch3) = scratch2.tmp_vec_znx_dft(module, acc_dft.rank()+1, acc_dft.size());
let (mut vmp_res, scratch3) = scratch2.tmp_glwe_fourier(module, basek, out_mut.k(), out_mut.rank());
let (mut xai_minus_one, scratch4) = scratch3.tmp_scalar_znx(module, 1);
let (mut xai_minus_one_dft, scratch5) = scratch4.tmp_scalar_znx_dft(module, 1);
@@ -73,13 +71,13 @@ pub fn cggi_blind_rotate<DataRes, DataIn, DataLUT>(
out_mut.dft(module, &mut acc_dft);
acc_add_dft.data.zero();
izip!(ai.iter(), ski.iter())
.enumerate()
.for_each(|(i, (aii, skii))| {
// vmp_res = DFT(acc) * BRK[i]
module.vmp_apply(&mut vmp_res, &acc_dft.data, &skii.data, scratch5);
module.vmp_apply(&mut vmp_res.data, &acc_dft.data, &skii.data, scratch5);
// DFT(X^ai -1)
xai_minus_one.zero();
@@ -90,19 +88,23 @@ pub fn cggi_blind_rotate<DataRes, DataIn, DataLUT>(
// DFT(X^ai -1) * (DFT(acc) * BRK[i])
(0..cols).for_each(|i|{
module.svp_apply_inplace(&mut vmp_res, i, &xai_minus_one_dft, 0);
module.vec_znx_dft_add_inplace(&mut acc_add_dft.data, i, &vmp_res, i);
module.svp_apply_inplace(&mut vmp_res.data, i, &xai_minus_one_dft, 0);
module.vec_znx_dft_add_inplace(&mut acc_add_dft.data, i, &vmp_res.data, i);
});
});
acc_add_dft.idft(module, &mut out_mut, scratch5);
(0..cols).for_each(|i|{
module.vec_znx_dft_add_inplace(&mut acc_dft.data, i, &acc_add_dft.data, i);
});
acc_dft.idft(module, &mut out_mut, scratch5);
});
let duration: std::time::Duration = start.elapsed();
println!("external products: {} us", duration.as_micros());
}
fn mod_switch_2n(module: &Module<FFT64>, res: &mut [i64], lwe: &LWECiphertext<&[u8]>) {
pub(crate) fn mod_switch_2n(module: &Module<FFT64>, res: &mut [i64], lwe: &LWECiphertext<&[u8]>) {
let basek: usize = lwe.basek();
let log2n: usize = module.log_n() + 1;