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Implement conditional_check_verify for NIZKs (#195)

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* Implement `ToBitsGadget` for `UInt8` and `Vec<UInt8>`
* Add `kary_or` function to `Boolean`.
This commit is contained in:
Bruno França
2020-04-22 21:30:33 +01:00
committed by GitHub
parent 5cc094be6b
commit bbb7d75ec8
7 changed files with 97 additions and 5 deletions
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12
crypto-primitives/src/nizk/constraints.rs
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@@ -20,4 +20,16 @@ pub trait NIZKVerifierGadget<N: NIZK, ConstraintF: Field> {
CS: ConstraintSystem<ConstraintF>,
I: Iterator<Item = &'a T>,
T: 'a + ToBitsGadget<ConstraintF> + ?Sized;
fn conditional_check_verify<'a, CS, I, T>(
cs: CS,
verification_key: &Self::VerificationKeyGadget,
input: I,
proof: &Self::ProofGadget,
condition: &Boolean,
) -> Result<(), SynthesisError>
where
CS: ConstraintSystem<ConstraintF>,
I: Iterator<Item = &'a T>,
T: 'a + ToBitsGadget<ConstraintF> + ?Sized;
}

25
crypto-primitives/src/nizk/gm17/constraints.rs
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@@ -109,10 +109,31 @@ where
type ProofGadget = ProofGadget<PairingE, ConstraintF, P>;
fn check_verify<'a, CS, I, T>(
cs: CS,
vk: &Self::VerificationKeyGadget,
public_inputs: I,
proof: &Self::ProofGadget,
) -> Result<(), SynthesisError>
where
CS: ConstraintSystem<ConstraintF>,
I: Iterator<Item = &'a T>,
T: 'a + ToBitsGadget<ConstraintF> + ?Sized,
{
<Self as NIZKVerifierGadget<Gm17<PairingE, C, V>, ConstraintF>>::conditional_check_verify(
cs,
vk,
public_inputs,
proof,
&Boolean::constant(true),
)
}
fn conditional_check_verify<'a, CS, I, T>(
mut cs: CS,
vk: &Self::VerificationKeyGadget,
mut public_inputs: I,
proof: &Self::ProofGadget,
condition: &Boolean,
) -> Result<(), SynthesisError>
where
CS: ConstraintSystem<ConstraintF>,
@@ -189,8 +210,8 @@ where
let test2 = P::final_exponentiation(cs.ns(|| "Final Exp 2"), &test2_exp)?;
let one = P::GTGadget::one(cs.ns(|| "GT One"))?;
test1.enforce_equal(cs.ns(|| "Test 1"), &one)?;
test2.enforce_equal(cs.ns(|| "Test 2"), &one)?;
test1.conditional_enforce_equal(cs.ns(|| "Test 1"), &one, condition)?;
test2.conditional_enforce_equal(cs.ns(|| "Test 2"), &one, condition)?;
Ok(())
}
}

2
crypto-primitives/src/nizk/gm17/mod.rs
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@@ -35,10 +35,10 @@ impl<E: PairingEngine, C: ConstraintSynthesizer<E::Fr>, V: ToConstraintField<E::
{
type Circuit = C;
type AssignedCircuit = C;
type VerifierInput = V;
type ProvingParameters = Parameters<E>;
type VerificationParameters = VerifyingKey<E>;
type PreparedVerificationParameters = PreparedVerifyingKey<E>;
type VerifierInput = V;
type Proof = Proof<E>;
fn setup<R: Rng>(

23
crypto-primitives/src/nizk/groth16/constraints.rs
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@@ -110,10 +110,31 @@ where
type ProofGadget = ProofGadget<PairingE, ConstraintF, P>;
fn check_verify<'a, CS, I, T>(
cs: CS,
vk: &Self::VerificationKeyGadget,
public_inputs: I,
proof: &Self::ProofGadget,
) -> Result<(), SynthesisError>
where
CS: ConstraintSystem<ConstraintF>,
I: Iterator<Item = &'a T>,
T: 'a + ToBitsGadget<ConstraintF> + ?Sized,
{
<Self as NIZKVerifierGadget<Groth16<PairingE, C, V>, ConstraintF>>::conditional_check_verify(
cs,
vk,
public_inputs,
proof,
&Boolean::constant(true),
)
}
fn conditional_check_verify<'a, CS, I, T>(
mut cs: CS,
vk: &Self::VerificationKeyGadget,
mut public_inputs: I,
proof: &Self::ProofGadget,
condition: &Boolean,
) -> Result<(), SynthesisError>
where
CS: ConstraintSystem<ConstraintF>,
@@ -161,7 +182,7 @@ where
let test = P::final_exponentiation(cs.ns(|| "Final Exp"), &test_exp).unwrap();
test.enforce_equal(cs.ns(|| "Test 1"), &pvk.alpha_g1_beta_g2)?;
test.conditional_enforce_equal(cs.ns(|| "Test 1"), &pvk.alpha_g1_beta_g2, condition)?;
Ok(())
}
}

2
crypto-primitives/src/nizk/groth16/mod.rs
View File

@@ -35,10 +35,10 @@ impl<E: PairingEngine, C: ConstraintSynthesizer<E::Fr>, V: ToConstraintField<E::
{
type Circuit = C;
type AssignedCircuit = C;
type VerifierInput = V;
type ProvingParameters = Parameters<E>;
type VerificationParameters = VerifyingKey<E>;
type PreparedVerificationParameters = PreparedVerifyingKey<E>;
type VerifierInput = V;
type Proof = Proof<E>;
fn setup<R: Rng>(