Feat/#24 calc commitment in mpc

Cargo.toml

@@ -58,4 +58,8 @@ path = "src/bin_test_marlin.rs"
 
 [[bin]]
 name = "bin-test-groth16"
-path = "src/bin_test_groth16.rs"
+path = "src/bin_test_groth16.rs"
+
+[[bin]]
+name = "online"
+path = "src/online.rs"

README.md

@@ -28,11 +28,11 @@ cargo build
 
 run(by groth16):
 ```
-cargo run groth16 ./inputs/inputs.json
+cargo run --bin main groth16 ./inputs/inputs.json
 ```
 or run(by marlin):
 ```
-cargo run marlin ./inputs/inputs.json
+cargo run --bin main marlin ./inputs/inputs.json
 ```
 
 ## Tests

arkworks/algebra/ec/src/group.rs

@@ -1,4 +1,5 @@
 use ark_serialize::{CanonicalDeserialize, CanonicalSerialize};
+use ark_std::PubUniformRand;
 use core::{
     fmt::{Debug, Display},
     hash::Hash,
@@ -27,6 +28,7 @@ pub trait Group:
     + Hash
     + Neg<Output = Self>
     + UniformRand
+    + PubUniformRand
     + Zero
     + Add<Self, Output = Self>
     + Sub<Self, Output = Self>

arkworks/algebra/ec/src/lib.rs

@@ -25,6 +25,7 @@ use ark_std::{
     hash::Hash,
     ops::{Add, AddAssign, MulAssign, Neg, Sub, SubAssign},
     vec::Vec,
+    PubUniformRand,
 };
 use num_traits::Zero;
 use zeroize::Zeroize;
@@ -138,6 +139,7 @@ pub trait ProjectiveCurve:
     + Debug
     + Display
     + UniformRand
+    + PubUniformRand
     + Zeroize
     + Zero
     + Neg<Output = Self>

arkworks/algebra/ec/src/models/short_weierstrass_jacobian.rs

@@ -13,7 +13,7 @@ use ark_std::{
 use ark_ff::{
     bytes::{FromBytes, ToBytes},
     fields::{BitIteratorBE, Field, PrimeField, SquareRootField},
-    ToConstraintField, UniformRand,
+    PubUniformRand, ToConstraintField, UniformRand,
 };
 
 use crate::{models::SWModelParameters as Parameters, AffineCurve, ProjectiveCurve};
@@ -352,6 +352,8 @@ impl<'a, P: Parameters> core::iter::Sum<&'a Self> for GroupAffine<P> {
     }
 }
 
+impl<P: Parameters> PubUniformRand for GroupAffine<P> {}
+
 mod group_impl {
     use super::*;
     use crate::group::Group;
@@ -433,6 +435,8 @@ impl<P: Parameters> Distribution<GroupProjective<P>> for Standard {
     }
 }
 
+impl<P: Parameters> PubUniformRand for GroupProjective<P> {}
+
 impl<P: Parameters> ToBytes for GroupProjective<P> {
     #[inline]
     fn write<W: Write>(&self, mut writer: W) -> IoResult<()> {

arkworks/algebra/ec/src/models/twisted_edwards_extended.rs

@@ -23,7 +23,7 @@ use zeroize::Zeroize;
 use ark_ff::{
     bytes::{FromBytes, ToBytes},
     fields::{BitIteratorBE, Field, PrimeField, SquareRootField},
-    ToConstraintField, UniformRand,
+    PubUniformRand, ToConstraintField, UniformRand,
 };
 
 #[cfg(feature = "parallel")]
@@ -269,6 +269,8 @@ impl<P: Parameters> Distribution<GroupAffine<P>> for Standard {
     }
 }
 
+impl<P: Parameters> PubUniformRand for GroupAffine<P> {}
+
 mod group_impl {
     use super::*;
     use crate::group::Group;
@@ -365,6 +367,20 @@ impl<P: Parameters> Distribution<GroupProjective<P>> for Standard {
     }
 }
 
+impl<P: Parameters> PubUniformRand for GroupProjective<P> {
+    #[inline]
+    fn pub_rand<R: Rng + ?Sized>(rng: &mut R) -> GroupProjective<P> {
+        loop {
+            let x = P::BaseField::pub_rand(rng);
+            let greatest = rng.gen();
+
+            if let Some(p) = GroupAffine::get_point_from_x(x, greatest) {
+                return p.scale_by_cofactor();
+            }
+        }
+    }
+}
+
 impl<P: Parameters> ToBytes for GroupProjective<P> {
     #[inline]
     fn write<W: Write>(&self, mut writer: W) -> IoResult<()> {

arkworks/crypto-primitives/Cargo.toml

@@ -33,6 +33,8 @@ rayon = { version = "1.0", optional = true }
 derivative = { version = "2.0", features = ["use_core"] }
 tracing = { version = "0.1", default-features = false, features = [ "attributes" ], optional = true }
 
+mpc-trait = { path = "../../mpc-trait" }
+
 [features]
 default = ["std"]
 std = [ "ark-ff/std", "ark-ec/std", "ark-std/std", "ark-relations/std" ]

arkworks/crypto-primitives/src/commitment/pedersen/mod.rs

@@ -4,7 +4,8 @@ use ark_ff::{bytes::ToBytes, BitIteratorLE, Field, FpParameters, PrimeField, ToC
 use ark_std::io::{Result as IoResult, Write};
 use ark_std::marker::PhantomData;
 use ark_std::rand::Rng;
-use ark_std::UniformRand;
+use ark_std::{PubUniformRand, UniformRand};
+use mpc_trait::MpcWire;
 
 use super::CommitmentScheme;
 
@@ -36,6 +37,15 @@ impl<C: ProjectiveCurve> UniformRand for Randomness<C> {
     }
 }
 
+impl<C: ProjectiveCurve> MpcWire for Randomness<C> {}
+
+impl<C: ProjectiveCurve> PubUniformRand for Randomness<C> {
+    #[inline]
+    fn pub_rand<R: Rng + ?Sized>(rng: &mut R) -> Self {
+        Randomness(PubUniformRand::pub_rand(rng))
+    }
+}
+
 impl<C: ProjectiveCurve> ToBytes for Randomness<C> {
     fn write<W: Write>(&self, writer: W) -> IoResult<()> {
         self.0.write(writer)

arkworks/crypto-primitives/src/crh/pedersen/mod.rs

@@ -41,7 +41,7 @@ impl<C: ProjectiveCurve, W: Window> CRH<C, W> {
 
     pub fn generator_powers<R: Rng>(num_powers: usize, rng: &mut R) -> Vec<C> {
         let mut cur_gen_powers = Vec::with_capacity(num_powers);
-        let mut base = C::rand(rng);
+        let mut base = C::pub_rand(rng);
         for _ in 0..num_powers {
             cur_gen_powers.push(base);
             base.double_in_place();

arkworks/marlin/src/ahp/mod.rs

@@ -178,7 +178,12 @@ impl<F: PrimeField> AHPForR1CS<F> {
                 (-beta * g_1_at_beta, LCTerm::One),
             ],
         );
-        debug_assert!(evals.get_lc_eval(&outer_sumcheck, beta)?.is_zero());
+        #[cfg(debug_assertions)]
+        {
+            let mut e = evals.get_lc_eval(&outer_sumcheck, beta)?;
+            e.publicize();
+            debug_assert!(e.is_zero(), "Evaluation of lc is\n{}\n, not zero", e);
+        }
 
         linear_combinations.push(z_b);
         linear_combinations.push(g_1);
@@ -244,7 +249,11 @@ impl<F: PrimeField> AHPForR1CS<F> {
 
         a.label = "inner_sumcheck".into();
         let inner_sumcheck = a;
-        debug_assert!(evals.get_lc_eval(&inner_sumcheck, gamma)?.is_zero());
+        debug_assert!({
+            let mut e = evals.get_lc_eval(&inner_sumcheck, gamma)?;
+            e.publicize();
+            e.is_zero()
+        });
 
         linear_combinations.push(g_2);
         linear_combinations.push(a_denom);

inputs/inputs.json

@@ -1,3 +1,5 @@
 {
-    "x": 4
+    "x": 4,
+    "y": 5,
+    "z": 6
 }

mpc-algebra/Cargo.toml

@@ -11,8 +11,11 @@ ark-ff = { path = "../arkworks/algebra/ff", version = "0.3.0" }
 ark-poly = { path = "../arkworks/algebra/poly", version = "0.3.0" }
 ark-serialize = { path = "../arkworks/algebra/serialize", version = "0.3.0" }
 ark-std = { path = "../arkworks/std", version = "0.3.0", features = ["std", "print-trace"] }
+ark-r1cs-std = { path = "../arkworks/r1cs-std", version = "0.3.0", default-features = false, optional = true }
+ark-crypto-primitives = { path = "../arkworks/crypto-primitives", version = "0.3.0" }
 
 ark-bls12-377 = { path = "../arkworks/curves/bls12_377", version = "0.3.0" }
+ark-ed-on-bls12-377 = { path = "../arkworks/curves/ed_on_bls12_377", version = "0.3.0" }
 
 rand = "0.8.5"
 num-bigint = { version = "0.4.3", features = ["rand"] }
@@ -24,4 +27,7 @@ mpc-net = { path = "../mpc-net" }
 mpc-trait = { path = "../mpc-trait" }
 
 structopt = "0.3"
-env_logger = "0.8"
+env_logger = "0.8"
+
+[features]
+default = ["ark-r1cs-std"]

mpc-algebra/src/share.rs

@@ -4,6 +4,8 @@ pub mod field;
 pub use field::*;
 pub mod group;
 pub use group::*;
+pub mod msm;
+pub use msm::*;
 pub mod pairing;
 pub use pairing::*;