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core refactoring (#69)
This commit is contained in:
Jean-Philippe Bossuat
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GitHub
GitHub
parent
6303346eef
commit
8d9897b88b
321
bin_fhe/blind_rotation/tests/key.rs
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321
bin_fhe/blind_rotation/tests/key.rs
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@@ -0,0 +1,321 @@
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use backend::hal::{
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api::{ScratchAvailable, SvpPPolAlloc, SvpPrepare, TakeVecZnx, TakeVecZnxDft, VecZnxAddScalarInplace, ZnxView, ZnxViewMut},
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layouts::{Backend, Data, DataMut, DataRef, Module, ReaderFrom, ScalarZnx, ScalarZnxToRef, Scratch, SvpPPol, WriterTo},
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};
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use sampling::source::Source;
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use crate::{
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Distribution, GGSWCiphertext, GGSWCiphertextExec, GGSWEncryptSkFamily, GGSWLayoutFamily, GLWESecretExec, Infos, LWESecret,
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};
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pub struct BlindRotationKeyCGGI<D: Data> {
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pub(crate) keys: Vec<GGSWCiphertext<D>>,
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pub(crate) dist: Distribution,
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}
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impl<D: Data> PartialEq for BlindRotationKeyCGGI<D> {
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fn eq(&self, other: &Self) -> bool {
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if self.keys.len() != other.keys.len() {
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return false;
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}
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for (a, b) in self.keys.iter().zip(other.keys.iter()) {
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if a != b {
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return false;
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}
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}
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self.dist == other.dist
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}
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}
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impl<D: Data> Eq for BlindRotationKeyCGGI<D> {}
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use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
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impl<D: DataMut> ReaderFrom for BlindRotationKeyCGGI<D> {
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fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
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match Distribution::read_from(reader) {
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Ok(dist) => self.dist = dist,
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Err(e) => return Err(e),
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}
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let len: usize = reader.read_u64::<LittleEndian>()? as usize;
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if self.keys.len() != len {
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return Err(std::io::Error::new(
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std::io::ErrorKind::InvalidData,
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format!("self.keys.len()={} != read len={}", self.keys.len(), len),
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));
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}
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for key in &mut self.keys {
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key.read_from(reader)?;
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}
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Ok(())
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}
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}
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impl<D: DataRef> WriterTo for BlindRotationKeyCGGI<D> {
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fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
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match self.dist.write_to(writer) {
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Ok(()) => {}
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Err(e) => return Err(e),
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}
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writer.write_u64::<LittleEndian>(self.keys.len() as u64)?;
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for key in &self.keys {
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key.write_to(writer)?;
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}
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Ok(())
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}
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}
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impl BlindRotationKeyCGGI<Vec<u8>> {
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pub fn alloc(n_gglwe: usize, n_lwe: usize, basek: usize, k: usize, rows: usize, rank: usize) -> Self {
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let mut data: Vec<GGSWCiphertext<Vec<u8>>> = Vec::with_capacity(n_lwe);
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(0..n_lwe).for_each(|_| data.push(GGSWCiphertext::alloc(n_gglwe, basek, k, rows, 1, rank)));
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Self {
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keys: data,
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dist: Distribution::NONE,
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}
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}
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pub fn generate_from_sk_scratch_space<B: Backend>(module: &Module<B>, n: usize, basek: usize, k: usize, rank: usize) -> usize
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where
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Module<B>: GGSWEncryptSkFamily<B>,
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{
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GGSWCiphertext::encrypt_sk_scratch_space(module, n, basek, k, rank)
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}
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}
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impl<D: DataRef> BlindRotationKeyCGGI<D> {
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#[allow(dead_code)]
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pub(crate) fn n(&self) -> usize {
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self.keys[0].n()
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}
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#[allow(dead_code)]
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pub(crate) fn rows(&self) -> usize {
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self.keys[0].rows()
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}
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#[allow(dead_code)]
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pub(crate) fn k(&self) -> usize {
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self.keys[0].k()
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}
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#[allow(dead_code)]
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pub(crate) fn size(&self) -> usize {
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self.keys[0].size()
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}
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#[allow(dead_code)]
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pub(crate) fn rank(&self) -> usize {
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self.keys[0].rank()
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}
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pub(crate) fn basek(&self) -> usize {
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self.keys[0].basek()
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}
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#[allow(dead_code)]
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pub(crate) fn block_size(&self) -> usize {
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match self.dist {
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Distribution::BinaryBlock(value) => value,
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_ => 1,
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}
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}
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}
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impl<D: DataMut> BlindRotationKeyCGGI<D> {
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pub fn generate_from_sk<DataSkGLWE, DataSkLWE, B: Backend>(
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&mut self,
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module: &Module<B>,
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sk_glwe: &GLWESecretExec<DataSkGLWE, B>,
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sk_lwe: &LWESecret<DataSkLWE>,
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source_xa: &mut Source,
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source_xe: &mut Source,
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sigma: f64,
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scratch: &mut Scratch<B>,
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) where
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DataSkGLWE: DataRef,
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DataSkLWE: DataRef,
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Module<B>: GGSWEncryptSkFamily<B> + VecZnxAddScalarInplace,
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Scratch<B>: TakeVecZnxDft<B> + ScratchAvailable + TakeVecZnx,
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{
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#[cfg(debug_assertions)]
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{
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assert_eq!(self.keys.len(), sk_lwe.n());
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assert!(sk_glwe.n() <= TakeScalarZnx);
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assert_eq!(sk_glwe.rank(), self.keys[0].rank());
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match sk_lwe.dist {
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Distribution::BinaryBlock(_)
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| Distribution::BinaryFixed(_)
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| Distribution::BinaryProb(_)
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| Distribution::ZERO => {}
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_ => panic!(
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"invalid GLWESecret distribution: must be BinaryBlock, BinaryFixed or BinaryProb (or ZERO for debugging)"
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),
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}
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}
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self.dist = sk_lwe.dist;
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let mut pt: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(sk_glwe.n(), 1);
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let sk_ref: ScalarZnx<&[u8]> = sk_lwe.data.to_ref();
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self.keys.iter_mut().enumerate().for_each(|(i, ggsw)| {
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pt.at_mut(0, 0)[0] = sk_ref.at(0, 0)[i];
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ggsw.encrypt_sk(module, &pt, sk_glwe, source_xa, source_xe, sigma, scratch);
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});
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}
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}
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#[derive(PartialEq, Eq)]
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pub struct BlindRotationKeyCGGIExec<D: Data, B: Backend> {
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pub(crate) data: Vec<GGSWCiphertextExec<D, B>>,
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pub(crate) dist: Distribution,
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pub(crate) x_pow_a: Option<Vec<SvpPPol<Vec<u8>, B>>>,
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}
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impl<D: Data, B: Backend> BlindRotationKeyCGGIExec<D, B> {
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#[allow(dead_code)]
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pub(crate) fn n(&self) -> usize {
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self.data[0].n()
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}
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#[allow(dead_code)]
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pub(crate) fn rows(&self) -> usize {
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self.data[0].rows()
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}
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#[allow(dead_code)]
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pub(crate) fn k(&self) -> usize {
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self.data[0].k()
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}
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#[allow(dead_code)]
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pub(crate) fn size(&self) -> usize {
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self.data[0].size()
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}
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#[allow(dead_code)]
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pub(crate) fn rank(&self) -> usize {
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self.data[0].rank()
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}
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pub(crate) fn basek(&self) -> usize {
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self.data[0].basek()
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}
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pub(crate) fn block_size(&self) -> usize {
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match self.dist {
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Distribution::BinaryBlock(value) => value,
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_ => 1,
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}
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}
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}
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pub trait BlindRotationKeyCGGIExecLayoutFamily<B: Backend> = GGSWLayoutFamily<B> + SvpPPolAlloc<B> + SvpPrepare<B>;
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impl<B: Backend> BlindRotationKeyCGGIExec<Vec<u8>, B> {
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pub fn alloc(module: &Module<B>, n_glwe: usize, n_lwe: usize, basek: usize, k: usize, rows: usize, rank: usize) -> Self
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where
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Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B>,
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{
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let mut data: Vec<GGSWCiphertextExec<Vec<u8>, B>> = Vec::with_capacity(n_lwe);
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(0..n_lwe).for_each(|_| {
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data.push(GGSWCiphertextExec::alloc(
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module, n_glwe, basek, k, rows, 1, rank,
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))
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});
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Self {
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data,
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dist: Distribution::NONE,
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x_pow_a: None,
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}
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}
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pub fn from<DataOther>(module: &Module<B>, other: &BlindRotationKeyCGGI<DataOther>, scratch: &mut Scratch<B>) -> Self
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where
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DataOther: DataRef,
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Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B>,
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{
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let mut brk: BlindRotationKeyCGGIExec<Vec<u8>, B> = Self::alloc(
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module,
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other.n(),
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other.keys.len(),
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other.basek(),
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other.k(),
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other.rows(),
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other.rank(),
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);
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brk.prepare(module, other, scratch);
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brk
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}
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}
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impl<D: DataMut, B: Backend> BlindRotationKeyCGGIExec<D, B> {
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pub fn prepare<DataOther>(&mut self, module: &Module<B>, other: &BlindRotationKeyCGGI<DataOther>, scratch: &mut Scratch<B>)
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where
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DataOther: DataRef,
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Module<B>: BlindRotationKeyCGGIExecLayoutFamily<B>,
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{
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#[cfg(debug_assertions)]
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{
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assert_eq!(self.data.len(), other.keys.len());
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}
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let n: usize = other.n();
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self.data
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.iter_mut()
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.zip(other.keys.iter())
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.for_each(|(ggsw_exec, other)| {
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ggsw_exec.prepare(module, other, scratch);
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});
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self.dist = other.dist;
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match other.dist {
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Distribution::BinaryBlock(_) => {
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let mut x_pow_a: Vec<SvpPPol<Vec<u8>, B>> = Vec::with_capacity(n << 1);
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let mut buf: ScalarZnx<Vec<u8>> = ScalarZnx::alloc(n, 1);
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(0..n << 1).for_each(|i| {
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let mut res: SvpPPol<Vec<u8>, B> = module.svp_ppol_alloc(n, 1);
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set_xai_plus_y(module, i, 0, &mut res, &mut buf);
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x_pow_a.push(res);
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});
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self.x_pow_a = Some(x_pow_a);
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}
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_ => {}
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}
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}
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}
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pub fn set_xai_plus_y<A, C, B: Backend>(module: &Module<B>, ai: usize, y: i64, res: &mut SvpPPol<A, B>, buf: &mut ScalarZnx<C>)
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where
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A: DataMut,
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C: DataMut,
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Module<B>: SvpPrepare<B>,
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{
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let n: usize = res.n();
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{
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let raw: &mut [i64] = buf.at_mut(0, 0);
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if ai < n {
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raw[ai] = 1;
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} else {
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raw[(ai - n) & (n - 1)] = -1;
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}
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raw[0] += y;
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}
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module.svp_prepare(res, 0, buf, 0);
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{
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let raw: &mut [i64] = buf.at_mut(0, 0);
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if ai < n {
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raw[ai] = 0;
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} else {
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raw[(ai - n) & (n - 1)] = 0;
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}
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raw[0] = 0;
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}
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}
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