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Add Hardware Abstraction Layer (#56)

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This commit is contained in:
Jean-Philippe Bossuat
2025-08-08 19:22:42 +02:00
committed by GitHub
parent 833520b163
commit 0e0745065e
194 changed files with 17397 additions and 11955 deletions
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52
backend/examples/rlwe_encrypt.rs
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@@ -1,7 +1,14 @@
use backend::{
AddNormal, Decoding, Encoding, FFT64, FillUniform, Module, ScalarZnx, ScalarZnxAlloc, ScalarZnxDft, ScalarZnxDftAlloc,
ScalarZnxDftOps, ScratchOwned, VecZnx, VecZnxAlloc, VecZnxBig, VecZnxBigAlloc, VecZnxBigOps, VecZnxBigScratch, VecZnxDft,
VecZnxDftAlloc, VecZnxDftOps, VecZnxOps, ZnxInfos,
hal::{
api::{
ModuleNew, ScalarZnxAlloc, ScratchOwnedAlloc, ScratchOwnedBorrow, SvpApplyInplace, SvpPPolAlloc, SvpPrepare,
VecZnxAddNormal, VecZnxAlloc, VecZnxBigAddSmallInplace, VecZnxBigAlloc, VecZnxBigNormalize,
VecZnxBigNormalizeTmpBytes, VecZnxBigSubSmallBInplace, VecZnxDecodeVeci64, VecZnxDftAlloc, VecZnxDftFromVecZnx,
VecZnxDftToVecZnxBigTmpA, VecZnxEncodeVeci64, VecZnxFillUniform, VecZnxNormalizeInplace, ZnxInfos,
},
layouts::{Module, ScalarZnx, ScratchOwned, SvpPPol, VecZnx, VecZnxBig, VecZnxDft},
},
implementation::cpu_spqlios::FFT64,
};
use itertools::izip;
use sampling::source::Source;
@@ -12,35 +19,35 @@ fn main() {
let ct_size: usize = 3;
let msg_size: usize = 2;
let log_scale: usize = msg_size * basek - 5;
let module: Module<FFT64> = Module::<FFT64>::new(n);
let module: Module<FFT64> = Module::<FFT64>::new(n as u64);
let mut scratch: ScratchOwned = ScratchOwned::new(module.vec_znx_big_normalize_tmp_bytes());
let mut scratch: ScratchOwned<FFT64> = ScratchOwned::<FFT64>::alloc(module.vec_znx_big_normalize_tmp_bytes(n));
let seed: [u8; 32] = [0; 32];
let mut source: Source = Source::new(seed);
// s <- Z_{-1, 0, 1}[X]/(X^{N}+1)
let mut s: ScalarZnx<Vec<u8>> = module.new_scalar_znx(1);
let mut s: ScalarZnx<Vec<u8>> = module.scalar_znx_alloc(1);
s.fill_ternary_prob(0, 0.5, &mut source);
// Buffer to store s in the DFT domain
let mut s_dft: ScalarZnxDft<Vec<u8>, FFT64> = module.new_scalar_znx_dft(s.cols());
let mut s_dft: SvpPPol<Vec<u8>, FFT64> = module.svp_ppol_alloc(s.cols());
// s_dft <- DFT(s)
module.svp_prepare(&mut s_dft, 0, &s, 0);
// Allocates a VecZnx with two columns: ct=(0, 0)
let mut ct: VecZnx<Vec<u8>> = module.new_vec_znx(
let mut ct: VecZnx<Vec<u8>> = module.vec_znx_alloc(
2, // Number of columns
ct_size, // Number of small poly per column
);
// Fill the second column with random values: ct = (0, a)
ct.fill_uniform(basek, 1, ct_size, &mut source);
module.vec_znx_fill_uniform(basek, &mut ct, 1, ct_size * basek, &mut source);
let mut buf_dft: VecZnxDft<Vec<u8>, FFT64> = module.new_vec_znx_dft(1, ct_size);
let mut buf_dft: VecZnxDft<Vec<u8>, FFT64> = module.vec_znx_dft_alloc(1, ct_size);
module.vec_znx_dft(1, 0, &mut buf_dft, 0, &ct, 1);
module.vec_znx_dft_from_vec_znx(1, 0, &mut buf_dft, 0, &ct, 1);
// Applies DFT(ct[1]) * DFT(s)
module.svp_apply_inplace(
@@ -53,18 +60,18 @@ fn main() {
// Alias scratch space (VecZnxDft<B> is always at least as big as VecZnxBig<B>)
// BIG(ct[1] * s) <- IDFT(DFT(ct[1] * s)) (not normalized)
let mut buf_big: VecZnxBig<Vec<u8>, FFT64> = module.new_vec_znx_big(1, ct_size);
module.vec_znx_idft_tmp_a(&mut buf_big, 0, &mut buf_dft, 0);
let mut buf_big: VecZnxBig<Vec<u8>, FFT64> = module.vec_znx_big_alloc(1, ct_size);
module.vec_znx_dft_to_vec_znx_big_tmp_a(&mut buf_big, 0, &mut buf_dft, 0);
// Creates a plaintext: VecZnx with 1 column
let mut m = module.new_vec_znx(
let mut m = module.vec_znx_alloc(
1, // Number of columns
msg_size, // Number of small polynomials
);
let mut want: Vec<i64> = vec![0; n];
want.iter_mut()
.for_each(|x| *x = source.next_u64n(16, 15) as i64);
m.encode_vec_i64(0, basek, log_scale, &want, 4);
module.encode_vec_i64(basek, &mut m, 0, log_scale, &want, 4);
module.vec_znx_normalize_inplace(basek, &mut m, 0, scratch.borrow());
// m - BIG(ct[1] * s)
@@ -88,13 +95,14 @@ fn main() {
// Add noise to ct[0]
// ct[0] <- ct[0] + e
ct.add_normal(
module.vec_znx_add_normal(
basek,
&mut ct,
0, // Selects the first column of ct (ct[0])
basek * ct_size, // Scaling of the noise: 2^{-basek * limbs}
&mut source,
3.2, // Standard deviation
19.0, // Truncatation bound
3.2, // Standard deviation
3.2 * 6.0, // Truncatation bound
);
// Final ciphertext: ct = (-a * s + m + e, a)
@@ -102,7 +110,7 @@ fn main() {
// Decryption
// DFT(ct[1] * s)
module.vec_znx_dft(1, 0, &mut buf_dft, 0, &ct, 1);
module.vec_znx_dft_from_vec_znx(1, 0, &mut buf_dft, 0, &ct, 1);
module.svp_apply_inplace(
&mut buf_dft,
0, // Selects the first column of res.
@@ -111,18 +119,18 @@ fn main() {
);
// BIG(c1 * s) = IDFT(DFT(c1 * s))
module.vec_znx_idft_tmp_a(&mut buf_big, 0, &mut buf_dft, 0);
module.vec_znx_dft_to_vec_znx_big_tmp_a(&mut buf_big, 0, &mut buf_dft, 0);
// BIG(c1 * s) + ct[0]
module.vec_znx_big_add_small_inplace(&mut buf_big, 0, &ct, 0);
// m + e <- BIG(ct[1] * s + ct[0])
let mut res = module.new_vec_znx(1, ct_size);
let mut res = module.vec_znx_alloc(1, ct_size);
module.vec_znx_big_normalize(basek, &mut res, 0, &buf_big, 0, scratch.borrow());
// have = m * 2^{log_scale} + e
let mut have: Vec<i64> = vec![i64::default(); n];
res.decode_vec_i64(0, basek, res.size() * basek, &mut have);
module.decode_vec_i64(basek, &mut res, 0, ct_size * basek, &mut have);
let scale: f64 = (1 << (res.size() * basek - log_scale)) as f64;
izip!(want.iter(), have.iter())