Merge pull request #20 from piotr-roslaniec/simple-decryption

Closes #5

.github/workflows/ferveo.yml

@@ -0,0 +1,35 @@
+name: ferveo
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+    tags:
+      - v*
+
+env:
+  CARGO_INCREMENTAL: 0
+  RUSTFLAGS: "-Dwarnings"
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - target: x86_64-unknown-linux-gnu
+            rust: 1.63 # MSRV, `cargo msrv`
+          - target: x86_64-unknown-linux-gnu
+            rust: stable
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          target: ${{ matrix.target }}
+          override: true
+      - run: ${{ matrix.deps }}
+      - run: cargo check --all-features
+      - run: cargo test --release --all-features

ferveo/Cargo.toml

@@ -18,6 +18,7 @@ ark-ff = "0.3"
 ark-serialize = "0.3"
 ark-poly = "0.3"
 rand = "0.8"
+rand_old = { package = "rand", version = "0.7" } # used by benchmarks/pairing.rs
 either = "1.6.1"
 hex = "0.4.2"
 miracl_core = "2.3.0"

ferveo/benches/benchmarks/pairing.rs

@@ -367,6 +367,7 @@ pub fn bench_batch_inverse(c: &mut Criterion) {
         criterion::BenchmarkId::new("BLS12-381 Batch inverse", n),
         &a,
         |b, a| {
+            #[allow(clippy::unit_arg)]
             b.iter(|| black_box(ark_ff::batch_inversion(&mut a.clone())));
         },
     );

ferveo/benches/benchmarks/pvdkg.rs

@@ -54,7 +54,7 @@ pub fn gen_validators(
             .map(|i| TendermintValidator {
                 power: i as u64,
                 address: format!("validator_{}", i),
-                public_key: keypairs[i as usize].public(),
+                public_key: keypairs[i].public(),
             })
             .collect(),
     )

ferveo/examples/pvdkg.rs

@@ -27,7 +27,7 @@ pub fn gen_validators(
             .map(|i| TendermintValidator {
                 power: i as u64,
                 address: format!("validator_{}", i),
-                public_key: keypairs[i as usize].public(),
+                public_key: keypairs[i].public(),
             })
             .collect(),
     )

ferveo/src/dkg/pv.rs

@@ -135,8 +135,8 @@ impl<E: PairingEngine> PubliclyVerifiableDkg<E> {
     /// Returns the public key generated by the DKG
     pub fn final_key(&self) -> E::G1Affine {
         self.vss
-            .iter()
-            .map(|(_, vss)| vss.coeffs[0].into_projective())
+            .values()
+            .map(|vss| vss.coeffs[0].into_projective())
             .sum::<E::G1Projective>()
             .into_affine()
     }

tpke-wasm/benches/benchmarks.rs

@@ -3,29 +3,21 @@ use criterion::{black_box, criterion_group, criterion_main, Criterion};
 pub fn bench_encrypt_combine(c: &mut Criterion) {
     use tpke_wasm::*;
 
-    fn bench_encrypt(
-        num_shares: usize,
-        num_entities: usize,
-        threshold: usize,
-    ) -> impl Fn() {
+    fn bench_encrypt(num_shares: usize, threshold: usize) -> impl Fn() {
         let message = "my-secret-message".as_bytes().to_vec();
         let aad = "my-aad".as_bytes().to_vec();
-        let setup = Setup::new(threshold, num_shares, num_entities);
+        let setup = Setup::new(threshold, num_shares);
         move || {
             let message = message.clone();
             let aad = aad.clone();
             black_box(encrypt(&message, &aad, &setup.public_key));
         }
     }
 
-    fn bench_combine(
-        num_shares: usize,
-        num_entities: usize,
-        threshold: usize,
-    ) -> impl Fn() {
+    fn bench_combine(num_shares: usize, threshold: usize) -> impl Fn() {
         let message = "my-secret-message".as_bytes().to_vec();
         let aad = "my-aad".as_bytes().to_vec();
-        let setup = Setup::new(threshold, num_shares, num_entities);
+        let setup = Setup::new(threshold, num_shares);
         let ciphertext = encrypt(&message.to_vec(), &aad, &setup.public_key);
         let participant_payloads: Vec<ParticipantPayload> = setup
             .decrypter_indexes()
@@ -45,6 +37,7 @@ pub fn bench_encrypt_combine(c: &mut Criterion) {
         move || {
             let setup = setup.clone();
             let decryption_shares = decryption_shares.clone();
+            #[allow(clippy::unit_arg)]
             black_box({
                 let mut ss_builder = SharedSecretBuilder::new(&setup);
                 for share in decryption_shares {
@@ -59,17 +52,19 @@ pub fn bench_encrypt_combine(c: &mut Criterion) {
     group.sample_size(10);
 
     for num_shares in [8, 16, 32, 64, 128].iter() {
-        let encrypt_fn = bench_encrypt(*num_shares, *num_shares, *num_shares);
+        let encrypt_fn = bench_encrypt(*num_shares, *num_shares);
         group.measurement_time(core::time::Duration::new(30, 0));
         group.bench_function(format!("tpke-wasm::encrypt - num_shares={}, num_entities={}, threshold={}", num_shares, num_shares, num_shares), |b| {
-                b.iter(|| encrypt_fn())
-            });
+            #[allow(clippy::redundant_closure)]
+            b.iter(|| encrypt_fn())
+        });
 
-        let combine_fn = bench_combine(*num_shares, *num_shares, *num_shares);
+        let combine_fn = bench_combine(*num_shares, *num_shares);
         group.measurement_time(core::time::Duration::new(30, 0));
         group.bench_function(format!("tpke-wasm::combine - num_shares={}, num_entities={}, threshold={}", num_shares, num_shares, num_shares), |b| {
-                    b.iter(|| combine_fn())
-                });
+            #[allow(clippy::redundant_closure)]
+            b.iter(|| combine_fn())
+        });
     }
 }
 

tpke-wasm/src/lib.rs

@@ -14,8 +14,8 @@ pub type E = ark_bls12_381::Bls12_381;
 pub type TpkePublicKey = ark_bls12_381::G1Affine;
 pub type TpkePrivateKey = ark_bls12_381::G2Affine;
 pub type TpkeCiphertext = tpke::Ciphertext<E>;
-pub type TpkeDecryptionShare = tpke::DecryptionShare<E>;
-pub type TpkePublicDecryptionContext = tpke::PublicDecryptionContext<E>;
+pub type TpkeDecryptionShare = tpke::DecryptionShareFast<E>;
+pub type TpkePublicDecryptionContext = tpke::PublicDecryptionContextFast<E>;
 pub type TpkeSharedSecret =
     <ark_bls12_381::Bls12_381 as ark_ec::PairingEngine>::Fqk;
 
@@ -163,22 +163,21 @@ pub struct Setup {
 #[wasm_bindgen]
 impl Setup {
     #[wasm_bindgen(constructor)]
-    pub fn new(
-        threshold: usize,
-        shares_num: usize,
-        num_entities: usize,
-    ) -> Self {
+    pub fn new(threshold: usize, shares_num: usize) -> Self {
         set_panic_hook();
 
         let mut rng = rand::thread_rng();
         let (public_key, private_key, contexts) =
-            tpke::setup::<E>(threshold, shares_num, num_entities, &mut rng);
+            tpke::setup_fast::<E>(threshold, shares_num, &mut rng);
         let private_contexts = contexts
             .clone()
             .into_iter()
             .map(|x| {
                 PrivateDecryptionContext(
-                    tpke::api::PrivateDecryptionContext::new(&x.b_inv, x.index),
+                    tpke::api::PrivateDecryptionContext::new(
+                        &x.setup_params.b_inv,
+                        x.index,
+                    ),
                 )
             })
             .collect();
@@ -286,9 +285,11 @@ impl SharedSecretBuilder {
         }
 
         let prepared_blinded_key_shares =
-            tpke::prepare_combine(&self.contexts, &self.shares);
-        let shared_secret =
-            tpke::share_combine(&self.shares, &prepared_blinded_key_shares);
+            tpke::prepare_combine_fast(&self.contexts, &self.shares);
+        let shared_secret = tpke::share_combine_fast(
+            &self.shares,
+            &prepared_blinded_key_shares,
+        );
         SharedSecret(shared_secret)
     }
 }

tpke-wasm/tests/node.rs

@@ -14,10 +14,9 @@ pub fn participant_payload_serialization() {
     // TODO: Build a ciphertext from scratch
     let threshold = 3;
     let shares_num = 5;
-    let num_entities = 5;
     let message = "my-secret-message".as_bytes().to_vec();
     let aad = "my-aad".as_bytes().to_vec();
-    let setup = Setup::new(threshold, shares_num, num_entities);
+    let setup = Setup::new(threshold, shares_num);
     let ciphertext = encrypt(&message, &aad, &setup.public_key);
 
     let participant_payload =
@@ -34,11 +33,10 @@ pub fn participant_payload_serialization() {
 fn encrypts_and_decrypts() {
     let threshold = 3;
     let shares_num = 5;
-    let num_entities = 5;
     let message = "my-secret-message".as_bytes().to_vec();
     let aad = "my-aad".as_bytes().to_vec();
 
-    let setup = Setup::new(threshold, shares_num, num_entities);
+    let setup = Setup::new(threshold, shares_num);
 
     let ciphertext = encrypt(&message, &aad, &setup.public_key);
     let plaintext = decrypt(&ciphertext, &setup.private_key);
@@ -52,7 +50,6 @@ fn encrypts_and_decrypts() {
 fn threshold_encryption() {
     let threshold = 16 * 2 / 3;
     let shares_num = 16;
-    let num_entities = 5;
     let message = "my-secret-message".as_bytes().to_vec();
     let aad = "my-aad".as_bytes().to_vec();
 
@@ -61,7 +58,7 @@ fn threshold_encryption() {
     //
 
     // Initialize the DKG setup
-    let setup = Setup::new(threshold, shares_num, num_entities);
+    let setup = Setup::new(threshold, shares_num);
 
     // Encrypt the message
     let ciphertext = encrypt(&message, &aad, &setup.public_key);

tpke/benches/benchmarks.rs

@@ -21,12 +21,12 @@ pub fn bench_decryption(c: &mut Criterion) {
         let threshold = num_shares * 2 / 3;
 
         let (pubkey, _, contexts) =
-            setup::<E>(threshold, num_shares, num_entities, &mut rng);
+            setup_fast::<E>(threshold, num_shares, &mut rng);
 
         // let mut messages: Vec<[u8; NUM_OF_TX]> = vec![];
         let mut messages: Vec<Vec<u8>> = vec![];
         let mut ciphertexts: Vec<Ciphertext<E>> = vec![];
-        let mut dec_shares: Vec<Vec<DecryptionShare<E>>> =
+        let mut dec_shares: Vec<Vec<DecryptionShareFast<E>>> =
             Vec::with_capacity(ciphertexts.len());
         for j in 0..num_msg {
             // let mut msg: [u8; NUM_OF_TX] = [0u8; NUM_OF_TX];
@@ -41,16 +41,16 @@ pub fn bench_decryption(c: &mut Criterion) {
                 dec_shares[j].push(ctx.create_share(&ciphertexts[j]));
             }
         }
-        let prepared_blinded_key_shares = prepare_combine(
+        let prepared_blinded_key_shares = prepare_combine_fast(
             &contexts[0].public_decryption_contexts,
             &dec_shares[0],
         );
 
         move || {
-            let shares: Vec<Vec<DecryptionShare<E>>> = dec_shares.clone();
+            let shares: Vec<Vec<DecryptionShareFast<E>>> = dec_shares.clone();
 
             for i in 0..ciphertexts.len() {
-                black_box(share_combine(
+                black_box(share_combine_fast(
                     &shares[i],
                     &prepared_blinded_key_shares,
                 ));
@@ -71,12 +71,12 @@ pub fn bench_decryption(c: &mut Criterion) {
         let threshold = num_shares * 2 / 3;
 
         let (pubkey, _, contexts) =
-            setup::<E>(threshold, num_shares, num_entities, &mut rng);
+            setup_fast::<E>(threshold, num_shares, &mut rng);
 
         // let mut messages: Vec<[u8; NUM_OF_TX]> = vec![];
         let mut messages: Vec<Vec<u8>> = vec![];
         let mut ciphertexts: Vec<Ciphertext<E>> = vec![];
-        let mut dec_shares: Vec<Vec<DecryptionShare<E>>> =
+        let mut dec_shares: Vec<Vec<DecryptionShareFast<E>>> =
             Vec::with_capacity(ciphertexts.len());
         for j in 0..num_msg {
             // let mut msg: [u8; NUM_OF_TX] = [0u8; NUM_OF_TX];
@@ -95,16 +95,16 @@ pub fn bench_decryption(c: &mut Criterion) {
         move || {
             let rng = &mut ark_std::test_rng();
             let c: Vec<Ciphertext<E>> = ciphertexts.clone();
-            let shares: Vec<Vec<DecryptionShare<E>>> = dec_shares.clone();
+            let shares: Vec<Vec<DecryptionShareFast<E>>> = dec_shares.clone();
 
             contexts[0].batch_verify_decryption_shares(&c, &shares, rng);
-            let prepared_blinded_key_shares = prepare_combine(
+            let prepared_blinded_key_shares = prepare_combine_fast(
                 &contexts[0].public_decryption_contexts,
                 &dec_shares[0],
             );
 
             for i in 0..ciphertexts.len() {
-                black_box(share_combine(
+                black_box(share_combine_fast(
                     &shares[i],
                     &prepared_blinded_key_shares,
                 ));
@@ -128,7 +128,8 @@ pub fn bench_decryption(c: &mut Criterion) {
                     );
                     group.measurement_time(core::time::Duration::new(30, 0));
                     group.bench_function(format!("share_combine: {} validators threshold {}*2/3 - #msg {} - msg-size = {} bytes", num_validators, num_shares, msg_num, msg_size), |b| {
-                b.iter(|| a())
+                    #[allow(clippy::redundant_closure)]
+                    b.iter(|| a())
             });
 
                     /*                let a = block_propose_bench(msg_num, num_shares, 150, msg_size);

tpke/src/api.rs

@@ -13,8 +13,8 @@ type E = ark_bls12_381::Bls12_381;
 type TpkePublicKey = ark_bls12_381::G1Affine;
 type TpkePrivateKey = ark_bls12_381::G2Affine;
 type TpkeCiphertext = crate::Ciphertext<E>;
-type TpkeDecryptionShare = crate::DecryptionShare<E>;
-type TpkePublicDecryptionContext = crate::PublicDecryptionContext<E>;
+type TpkeDecryptionShare = crate::DecryptionShareFast<E>;
+type TpkePublicDecryptionContext = crate::PublicDecryptionContextFast<E>;
 type TpkeSharedSecret =
     <ark_bls12_381::Bls12_381 as ark_ec::PairingEngine>::Fqk;