mirror of
https://github.com/arnaucube/phantom-zone.git
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non interactive mp works
This commit is contained in:
Janmajaya Mall
196
src/shortint/enc_dec.rs
Normal file
196
src/shortint/enc_dec.rs
Normal file
@@ -0,0 +1,196 @@
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use itertools::Itertools;
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use crate::{
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bool::BoolEvaluator,
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random::{DefaultSecureRng, RandomFillUniformInModulus},
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utils::{TryConvertFrom1, WithLocal},
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Decryptor, Encryptor, KeySwitchWithId, Matrix, MatrixEntity, MatrixMut, MultiPartyDecryptor,
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RowMut,
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};
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#[derive(Clone)]
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pub struct FheUint8<C> {
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pub(super) data: Vec<C>,
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}
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impl<C> FheUint8<C> {
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pub(super) fn data(&self) -> &[C] {
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&self.data
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}
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pub(super) fn data_mut(&mut self) -> &mut [C] {
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&mut self.data
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}
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}
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pub struct BatchedFheUint8<C> {
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data: Vec<C>,
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}
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impl<M: MatrixEntity + MatrixMut<MatElement = u64>> From<&SeededBatchedFheUint8<M::R, [u8; 32]>>
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for BatchedFheUint8<M>
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where
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<M as Matrix>::R: RowMut,
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{
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fn from(value: &SeededBatchedFheUint8<M::R, [u8; 32]>) -> Self {
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BoolEvaluator::with_local(|e| {
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let parameters = e.parameters();
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let ring_size = parameters.rlwe_n().0;
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let rlwe_q = parameters.rlwe_q();
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let mut prng = DefaultSecureRng::new_seeded(value.seed);
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let rlwes = value
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.data
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.iter()
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.map(|partb| {
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let mut rlwe = M::zeros(2, ring_size);
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// sample A
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RandomFillUniformInModulus::random_fill(&mut prng, rlwe_q, rlwe.get_row_mut(0));
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// Copy over B
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rlwe.get_row_mut(1).copy_from_slice(partb.as_ref());
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rlwe
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})
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.collect_vec();
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Self { data: rlwes }
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})
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}
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}
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pub struct SeededBatchedFheUint8<C, S> {
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data: Vec<C>,
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seed: S,
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}
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impl<C, S> SeededBatchedFheUint8<C, S> {
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pub fn unseed<M>(&self) -> BatchedFheUint8<M>
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where
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BatchedFheUint8<M>: for<'a> From<&'a SeededBatchedFheUint8<C, S>>,
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M: Matrix<R = C>,
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{
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BatchedFheUint8::from(self)
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}
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}
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impl<K, C, S> Encryptor<[u8], SeededBatchedFheUint8<C, S>> for K
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where
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K: Encryptor<[bool], (Vec<C>, S)>,
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{
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fn encrypt(&self, m: &[u8]) -> SeededBatchedFheUint8<C, S> {
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// convert vector of u8s to vector bools
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let m = m
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.iter()
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.flat_map(|v| (0..8).into_iter().map(|i| (((*v) >> i) & 1) == 1))
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.collect_vec();
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let (cts, seed) = K::encrypt(&self, &m);
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dbg!(cts.len());
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SeededBatchedFheUint8 { data: cts, seed }
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}
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}
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impl<K, C> Encryptor<[u8], BatchedFheUint8<C>> for K
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where
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K: Encryptor<[bool], Vec<C>>,
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{
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fn encrypt(&self, m: &[u8]) -> BatchedFheUint8<C> {
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let m = m
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.iter()
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.flat_map(|v| {
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(0..8)
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.into_iter()
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.map(|i| ((*v >> i) & 1) == 1)
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.collect_vec()
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})
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.collect_vec();
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let cts = K::encrypt(&self, &m);
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BatchedFheUint8 { data: cts }
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}
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}
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impl<C> KeySwitchWithId<BatchedFheUint8<C>> for BatchedFheUint8<C>
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where
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C: KeySwitchWithId<C>,
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{
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fn key_switch(&self, user_id: usize) -> BatchedFheUint8<C> {
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let data = self
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.data
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.iter()
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.map(|c| c.key_switch(user_id))
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.collect_vec();
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BatchedFheUint8 { data }
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}
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}
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impl<C, K> MultiPartyDecryptor<u8, FheUint8<C>> for K
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where
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K: MultiPartyDecryptor<bool, C>,
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<Self as MultiPartyDecryptor<bool, C>>::DecryptionShare: Clone,
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{
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type DecryptionShare = Vec<<Self as MultiPartyDecryptor<bool, C>>::DecryptionShare>;
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fn gen_decryption_share(&self, c: &FheUint8<C>) -> Self::DecryptionShare {
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assert!(c.data().len() == 8);
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c.data()
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.iter()
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.map(|bit_c| {
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let decryption_share =
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MultiPartyDecryptor::<bool, C>::gen_decryption_share(self, bit_c);
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decryption_share
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})
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.collect_vec()
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}
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fn aggregate_decryption_shares(&self, c: &FheUint8<C>, shares: &[Self::DecryptionShare]) -> u8 {
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let mut out = 0u8;
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(0..8).into_iter().for_each(|i| {
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// Collect bit i^th decryption share of each party
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let bit_i_decryption_shares = shares.iter().map(|s| s[i].clone()).collect_vec();
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let bit_i = MultiPartyDecryptor::<bool, C>::aggregate_decryption_shares(
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self,
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&c.data()[i],
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&bit_i_decryption_shares,
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);
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if bit_i {
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out += 1 << i;
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}
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});
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out
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}
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}
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impl<C, K> Encryptor<u8, FheUint8<C>> for K
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where
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K: Encryptor<bool, C>,
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{
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fn encrypt(&self, m: &u8) -> FheUint8<C> {
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let cts = (0..8)
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.into_iter()
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.map(|i| {
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let bit = ((m >> i) & 1) == 1;
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K::encrypt(self, &bit)
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})
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.collect_vec();
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FheUint8 { data: cts }
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}
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}
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impl<K, C> Decryptor<u8, FheUint8<C>> for K
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where
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K: Decryptor<bool, C>,
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{
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fn decrypt(&self, c: &FheUint8<C>) -> u8 {
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assert!(c.data.len() == 8);
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let mut out = 0u8;
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c.data().iter().enumerate().for_each(|(index, bit_c)| {
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let bool = K::decrypt(self, bit_c);
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if bool {
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out += 1 << index;
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}
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});
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out
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}
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}
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@@ -1,110 +1,30 @@
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use itertools::Itertools;
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use crate::{
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bool::{ClientKey, PublicKey},
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Decryptor, Encryptor, MultiPartyDecryptor,
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bool::{parameters::CiphertextModulus, ClientKey, PublicKey},
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random::{DefaultSecureRng, NewWithSeed, RandomFillUniformInModulus},
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utils::{TryConvertFrom1, WithLocal},
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Decryptor, Encryptor, Matrix, MatrixEntity, MatrixMut, MultiPartyDecryptor, Row, RowMut,
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};
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mod enc_dec;
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mod ops;
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mod types;
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pub type FheUint8 = types::FheUint8<Vec<u64>>;
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impl Encryptor<u8, FheUint8> for ClientKey {
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fn encrypt(&self, m: &u8) -> FheUint8 {
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let cts = (0..8)
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.into_iter()
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.map(|i| {
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let bit = ((m >> i) & 1) == 1;
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Encryptor::<bool, Vec<u64>>::encrypt(self, &bit)
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})
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.collect_vec();
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FheUint8 { data: cts }
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}
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}
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impl Decryptor<u8, FheUint8> for ClientKey {
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fn decrypt(&self, c: &FheUint8) -> u8 {
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assert!(c.data.len() == 8);
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let mut out = 0u8;
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c.data().iter().enumerate().for_each(|(index, bit_c)| {
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let bool = Decryptor::<bool, Vec<u64>>::decrypt(self, bit_c);
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if bool {
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out += 1 << index;
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}
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});
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out
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}
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}
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impl<M, R, Mo> Encryptor<u8, FheUint8> for PublicKey<M, R, Mo>
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where
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PublicKey<M, R, Mo>: Encryptor<bool, Vec<u64>>,
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{
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fn encrypt(&self, m: &u8) -> FheUint8 {
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let cts = (0..8)
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.into_iter()
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.map(|i| {
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let bit = ((m >> i) & 1) == 1;
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Encryptor::<bool, Vec<u64>>::encrypt(self, &bit)
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})
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.collect_vec();
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FheUint8 { data: cts }
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}
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}
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impl MultiPartyDecryptor<u8, FheUint8> for ClientKey
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where
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ClientKey: MultiPartyDecryptor<bool, Vec<u64>>,
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{
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type DecryptionShare = Vec<<Self as MultiPartyDecryptor<bool, Vec<u64>>>::DecryptionShare>;
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fn gen_decryption_share(&self, c: &FheUint8) -> Self::DecryptionShare {
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assert!(c.data().len() == 8);
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c.data()
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.iter()
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.map(|bit_c| {
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let decryption_share =
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MultiPartyDecryptor::<bool, Vec<u64>>::gen_decryption_share(self, bit_c);
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decryption_share
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})
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.collect_vec()
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}
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fn aggregate_decryption_shares(&self, c: &FheUint8, shares: &[Self::DecryptionShare]) -> u8 {
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let mut out = 0u8;
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(0..8).into_iter().for_each(|i| {
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// Collect bit i^th decryption share of each party
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let bit_i_decryption_shares = shares.iter().map(|s| s[i]).collect_vec();
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let bit_i = MultiPartyDecryptor::<bool, Vec<u64>>::aggregate_decryption_shares(
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self,
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&c.data()[i],
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&bit_i_decryption_shares,
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);
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if bit_i {
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out += 1 << i;
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}
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});
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out
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}
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}
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pub type FheUint8 = enc_dec::FheUint8<Vec<u64>>;
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pub type FheBool = Vec<u64>;
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mod frontend {
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use super::ops::{
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arbitrary_bit_adder, arbitrary_bit_division_for_quotient_and_rem, arbitrary_bit_subtractor,
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eight_bit_mul,
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};
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use crate::{
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bool::evaluator::{BoolEvaluator, BooleanGates},
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utils::{Global, WithLocal},
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};
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use crate::utils::{Global, WithLocal};
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use super::FheUint8;
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use super::*;
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mod arithetic {
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use crate::bool::{FheBool, RuntimeServerKey};
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use crate::bool::{evaluator::BooleanGates, BoolEvaluator, RuntimeServerKey};
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use super::*;
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use std::ops::{Add, AddAssign, Div, Mul, Rem, Sub};
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@@ -230,7 +150,7 @@ mod frontend {
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mod booleans {
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use crate::{
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bool::{evaluator::BooleanGates, FheBool, RuntimeServerKey},
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bool::{evaluator::BooleanGates, BoolEvaluator, RuntimeServerKey},
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shortint::ops::{
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arbitrary_bit_comparator, arbitrary_bit_equality, arbitrary_signed_bit_comparator,
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},
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@@ -303,214 +223,155 @@ mod tests {
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use num_traits::Euclid;
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use crate::{
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bool::{
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aggregate_public_key_shares, aggregate_server_key_shares, gen_client_key, gen_keys,
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gen_mp_keys_phase1, gen_mp_keys_phase2, set_mp_seed, set_parameter_set,
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},
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shortint::types::FheUint8,
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Decryptor, Encryptor, MultiPartyDecryptor,
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bool::set_parameter_set, shortint::enc_dec::FheUint8, Decryptor, Encryptor,
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MultiPartyDecryptor,
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};
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#[test]
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fn all_uint8_apis() {
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set_parameter_set(crate::ParameterSelector::MultiPartyLessThanOrEqualTo16);
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// #[test]
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// fn all_uint8_apis() {
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// set_parameter_set(crate::ParameterSelector::MultiPartyLessThanOrEqualTo16);
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let (ck, sk) = gen_keys();
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sk.set_server_key();
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// let (ck, sk) = gen_keys();
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// sk.set_server_key();
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for i in 144..=255 {
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for j in 100..=255 {
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let m0 = i;
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let m1 = j;
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let c0 = ck.encrypt(&m0);
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let c1 = ck.encrypt(&m1);
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// for i in 144..=255 {
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// for j in 100..=255 {
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// let m0 = i;
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// let m1 = j;
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// let c0 = ck.encrypt(&m0);
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// let c1 = ck.encrypt(&m1);
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assert!(ck.decrypt(&c0) == m0);
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assert!(ck.decrypt(&c1) == m1);
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// assert!(ck.decrypt(&c0) == m0);
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// assert!(ck.decrypt(&c1) == m1);
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// Arithmetic
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{
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{
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// Add
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let mut c_m0_plus_m1 = FheUint8 {
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data: c0.data().to_vec(),
|
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};
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c_m0_plus_m1 += &c1;
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let m0_plus_m1 = ck.decrypt(&c_m0_plus_m1);
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assert_eq!(
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m0_plus_m1,
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m0.wrapping_add(m1),
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"Expected {} but got {m0_plus_m1} for {i}+{j}",
|
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m0.wrapping_add(m1)
|
||||
);
|
||||
}
|
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{
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// Sub
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let c_sub = &c0 - &c1;
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let m0_sub_m1 = ck.decrypt(&c_sub);
|
||||
assert_eq!(
|
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m0_sub_m1,
|
||||
m0.wrapping_sub(m1),
|
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"Expected {} but got {m0_sub_m1} for {i}-{j}",
|
||||
m0.wrapping_sub(m1)
|
||||
);
|
||||
}
|
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// // Arithmetic
|
||||
// {
|
||||
// {
|
||||
// // Add
|
||||
// let mut c_m0_plus_m1 = FheUint8 {
|
||||
// data: c0.data().to_vec(),
|
||||
// };
|
||||
// c_m0_plus_m1 += &c1;
|
||||
// let m0_plus_m1 = ck.decrypt(&c_m0_plus_m1);
|
||||
// assert_eq!(
|
||||
// m0_plus_m1,
|
||||
// m0.wrapping_add(m1),
|
||||
// "Expected {} but got {m0_plus_m1} for {i}+{j}",
|
||||
// m0.wrapping_add(m1)
|
||||
// );
|
||||
// }
|
||||
// {
|
||||
// // Sub
|
||||
// let c_sub = &c0 - &c1;
|
||||
// let m0_sub_m1 = ck.decrypt(&c_sub);
|
||||
// assert_eq!(
|
||||
// m0_sub_m1,
|
||||
// m0.wrapping_sub(m1),
|
||||
// "Expected {} but got {m0_sub_m1} for {i}-{j}",
|
||||
// m0.wrapping_sub(m1)
|
||||
// );
|
||||
// }
|
||||
|
||||
{
|
||||
// Mul
|
||||
let c_m0m1 = &c0 * &c1;
|
||||
let m0m1 = ck.decrypt(&c_m0m1);
|
||||
assert_eq!(
|
||||
m0m1,
|
||||
m0.wrapping_mul(m1),
|
||||
"Expected {} but got {m0m1} for {i}x{j}",
|
||||
m0.wrapping_mul(m1)
|
||||
);
|
||||
}
|
||||
// {
|
||||
// // Mul
|
||||
// let c_m0m1 = &c0 * &c1;
|
||||
// let m0m1 = ck.decrypt(&c_m0m1);
|
||||
// assert_eq!(
|
||||
// m0m1,
|
||||
// m0.wrapping_mul(m1),
|
||||
// "Expected {} but got {m0m1} for {i}x{j}",
|
||||
// m0.wrapping_mul(m1)
|
||||
// );
|
||||
// }
|
||||
|
||||
// Div & Rem
|
||||
{
|
||||
let (c_quotient, c_rem) = c0.div_rem(&c1);
|
||||
let m_quotient = ck.decrypt(&c_quotient);
|
||||
let m_remainder = ck.decrypt(&c_rem);
|
||||
if j != 0 {
|
||||
let (q, r) = i.div_rem_euclid(&j);
|
||||
assert_eq!(
|
||||
m_quotient, q,
|
||||
"Expected {} but got {m_quotient} for {i}/{j}",
|
||||
q
|
||||
);
|
||||
assert_eq!(
|
||||
m_remainder, r,
|
||||
"Expected {} but got {m_quotient} for {i}%{j}",
|
||||
r
|
||||
);
|
||||
} else {
|
||||
assert_eq!(
|
||||
m_quotient, 255,
|
||||
"Expected 255 but got {m_quotient}. Case div by zero"
|
||||
);
|
||||
assert_eq!(
|
||||
m_remainder, i,
|
||||
"Expected {i} but got {m_quotient}. Case div by zero"
|
||||
)
|
||||
}
|
||||
}
|
||||
}
|
||||
// // Div & Rem
|
||||
// {
|
||||
// let (c_quotient, c_rem) = c0.div_rem(&c1);
|
||||
// let m_quotient = ck.decrypt(&c_quotient);
|
||||
// let m_remainder = ck.decrypt(&c_rem);
|
||||
// if j != 0 {
|
||||
// let (q, r) = i.div_rem_euclid(&j);
|
||||
// assert_eq!(
|
||||
// m_quotient, q,
|
||||
// "Expected {} but got {m_quotient} for
|
||||
// {i}/{j}", q
|
||||
// );
|
||||
// assert_eq!(
|
||||
// m_remainder, r,
|
||||
// "Expected {} but got {m_quotient} for
|
||||
// {i}%{j}", r
|
||||
// );
|
||||
// } else {
|
||||
// assert_eq!(
|
||||
// m_quotient, 255,
|
||||
// "Expected 255 but got {m_quotient}. Case div
|
||||
// by zero" );
|
||||
// assert_eq!(
|
||||
// m_remainder, i,
|
||||
// "Expected {i} but got {m_quotient}. Case div
|
||||
// by zero" )
|
||||
// }
|
||||
// }
|
||||
// }
|
||||
|
||||
// Comparisons
|
||||
{
|
||||
{
|
||||
let c_eq = c0.eq(&c1);
|
||||
let is_eq = ck.decrypt(&c_eq);
|
||||
assert_eq!(
|
||||
is_eq,
|
||||
i == j,
|
||||
"Expected {} but got {is_eq} for {i}=={j}",
|
||||
i == j
|
||||
);
|
||||
}
|
||||
// // Comparisons
|
||||
// {
|
||||
// {
|
||||
// let c_eq = c0.eq(&c1);
|
||||
// let is_eq = ck.decrypt(&c_eq);
|
||||
// assert_eq!(
|
||||
// is_eq,
|
||||
// i == j,
|
||||
// "Expected {} but got {is_eq} for {i}=={j}",
|
||||
// i == j
|
||||
// );
|
||||
// }
|
||||
|
||||
{
|
||||
let c_gt = c0.gt(&c1);
|
||||
let is_gt = ck.decrypt(&c_gt);
|
||||
assert_eq!(
|
||||
is_gt,
|
||||
i > j,
|
||||
"Expected {} but got {is_gt} for {i}>{j}",
|
||||
i > j
|
||||
);
|
||||
}
|
||||
// {
|
||||
// let c_gt = c0.gt(&c1);
|
||||
// let is_gt = ck.decrypt(&c_gt);
|
||||
// assert_eq!(
|
||||
// is_gt,
|
||||
// i > j,
|
||||
// "Expected {} but got {is_gt} for {i}>{j}",
|
||||
// i > j
|
||||
// );
|
||||
// }
|
||||
|
||||
{
|
||||
let c_lt = c0.lt(&c1);
|
||||
let is_lt = ck.decrypt(&c_lt);
|
||||
assert_eq!(
|
||||
is_lt,
|
||||
i < j,
|
||||
"Expected {} but got {is_lt} for {i}<{j}",
|
||||
i < j
|
||||
);
|
||||
}
|
||||
// {
|
||||
// let c_lt = c0.lt(&c1);
|
||||
// let is_lt = ck.decrypt(&c_lt);
|
||||
// assert_eq!(
|
||||
// is_lt,
|
||||
// i < j,
|
||||
// "Expected {} but got {is_lt} for {i}<{j}",
|
||||
// i < j
|
||||
// );
|
||||
// }
|
||||
|
||||
{
|
||||
let c_ge = c0.ge(&c1);
|
||||
let is_ge = ck.decrypt(&c_ge);
|
||||
assert_eq!(
|
||||
is_ge,
|
||||
i >= j,
|
||||
"Expected {} but got {is_ge} for {i}>={j}",
|
||||
i >= j
|
||||
);
|
||||
}
|
||||
// {
|
||||
// let c_ge = c0.ge(&c1);
|
||||
// let is_ge = ck.decrypt(&c_ge);
|
||||
// assert_eq!(
|
||||
// is_ge,
|
||||
// i >= j,
|
||||
// "Expected {} but got {is_ge} for {i}>={j}",
|
||||
// i >= j
|
||||
// );
|
||||
// }
|
||||
|
||||
{
|
||||
let c_le = c0.le(&c1);
|
||||
let is_le = ck.decrypt(&c_le);
|
||||
assert_eq!(
|
||||
is_le,
|
||||
i <= j,
|
||||
"Expected {} but got {is_le} for {i}<={j}",
|
||||
i <= j
|
||||
);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn fheuint8_test_multi_party() {
|
||||
set_parameter_set(crate::ParameterSelector::MultiPartyLessThanOrEqualTo16);
|
||||
set_mp_seed([0; 32]);
|
||||
|
||||
let parties = 8;
|
||||
|
||||
// client keys and public key share
|
||||
let cks = (0..parties)
|
||||
.into_iter()
|
||||
.map(|i| gen_client_key())
|
||||
.collect_vec();
|
||||
|
||||
// round 1: generate pulic key shares
|
||||
let pk_shares = cks.iter().map(|key| gen_mp_keys_phase1(key)).collect_vec();
|
||||
|
||||
let public_key = aggregate_public_key_shares(&pk_shares);
|
||||
|
||||
// round 2: generate server key shares
|
||||
let server_key_shares = cks
|
||||
.iter()
|
||||
.map(|key| gen_mp_keys_phase2(key, &public_key))
|
||||
.collect_vec();
|
||||
|
||||
// server aggregates the server key
|
||||
let server_key = aggregate_server_key_shares(&server_key_shares);
|
||||
server_key.set_server_key();
|
||||
|
||||
// Clients use Pk to encrypt private inputs
|
||||
let a = 8u8;
|
||||
let b = 10u8;
|
||||
let c = 155u8;
|
||||
let ct_a = public_key.encrypt(&a);
|
||||
let ct_b = public_key.encrypt(&b);
|
||||
let ct_c = public_key.encrypt(&c);
|
||||
|
||||
let now = std::time::Instant::now();
|
||||
// server computes
|
||||
// a*b + c
|
||||
let mut ct_ab = &ct_a * &ct_b;
|
||||
ct_ab += &ct_c;
|
||||
println!("Circuit time: {:?}", now.elapsed());
|
||||
|
||||
// decrypt ab and check
|
||||
// generate decryption shares
|
||||
let decryption_shares = cks
|
||||
.iter()
|
||||
.map(|k| k.gen_decryption_share(&ct_ab))
|
||||
.collect_vec();
|
||||
|
||||
// aggregate and decryption ab
|
||||
let ab_add_c = cks[0].aggregate_decryption_shares(&ct_ab, &decryption_shares);
|
||||
assert!(ab_add_c == (a.wrapping_mul(b)).wrapping_add(c));
|
||||
}
|
||||
// {
|
||||
// let c_le = c0.le(&c1);
|
||||
// let is_le = ck.decrypt(&c_le);
|
||||
// assert_eq!(
|
||||
// is_le,
|
||||
// i <= j,
|
||||
// "Expected {} but got {is_le} for {i}<={j}",
|
||||
// i <= j
|
||||
// );
|
||||
// }
|
||||
// }
|
||||
// }
|
||||
// }
|
||||
// }
|
||||
}
|
||||
|
||||
@@ -1,14 +0,0 @@
|
||||
#[derive(Clone)]
|
||||
pub struct FheUint8<C> {
|
||||
pub(super) data: Vec<C>,
|
||||
}
|
||||
|
||||
impl<C> FheUint8<C> {
|
||||
pub(super) fn data(&self) -> &[C] {
|
||||
&self.data
|
||||
}
|
||||
|
||||
pub(super) fn data_mut(&mut self) -> &mut [C] {
|
||||
&mut self.data
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user