ed255/pod2
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

add circuit to verify signatures (SignatureVerifyGadget) (#167)

Browse source 
* implement circuit to verify signature (proof-based signature), ie. a 1-level recursion verification

* as agreed in the call, rename Gate -> Gadget when it's not a 'gate'

* make SignatureVerifyGadget conditional on the selector input

* small naming polish

* sigverifygadget: add s computation in-circuit, connect pk,msg,s to internalproof's public_inputs

* optimize signature verify

---------

Co-authored-by: Eduard S. <eduardsanou@posteo.net>
This commit is contained in:
arnaucube 2025-04-01 01:36:37 +02:00 • committed by GitHub
parent d00ff95f41
commit 0637f52573
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
7 changed files with 325 additions and 42 deletions
Download patch file Download diff file Expand all files Collapse all files

30
src/backends/plonky2/circuits/mainpod.rs
View file

@ -21,7 +21,7 @@ use crate::backends::plonky2::circuits::common::{
};
use crate::backends::plonky2::primitives::merkletree::MerkleTree;
use crate::backends::plonky2::primitives::merkletree::{
MerkleProofExistenceGate, MerkleProofExistenceTarget,
MerkleProofExistenceGadget, MerkleProofExistenceTarget,
};
use crate::middleware::{
hash_str, AnchoredKey, NativeOperation, NativePredicate, Params, PodType, Statement,
@ -34,18 +34,18 @@ use super::common::Flattenable;
// SignedPod verification
//
struct SignedPodVerifyGate {
struct SignedPodVerifyGadget {
params: Params,
}
impl SignedPodVerifyGate {
impl SignedPodVerifyGadget {
fn eval(&self, builder: &mut CircuitBuilder<F, D>) -> Result<SignedPodVerifyTarget> {
// 2. Verify id
let id = builder.add_virtual_hash();
let mut mt_proofs = Vec::new();
for _ in 0..self.params.max_signed_pod_values {
let mt_proof = MerkleProofExistenceGate {
max_depth: self.params.max_depth_mt_gate,
let mt_proof = MerkleProofExistenceGadget {
max_depth: self.params.max_depth_mt_gadget,
}
.eval(builder)?;
builder.connect_hashes(id, mt_proof.root);
@ -100,7 +100,7 @@ impl SignedPodVerifyTarget {
fn set_targets(&self, pw: &mut PartialWitness<F>, input: &SignedPodVerifyInput) -> Result<()> {
assert!(input.kvs.len() <= self.params.max_signed_pod_values);
let tree = MerkleTree::new(self.params.max_depth_mt_gate, &input.kvs)?;
let tree = MerkleTree::new(self.params.max_depth_mt_gadget, &input.kvs)?;
// First handle the type entry, then the rest of the entries, and finally pad with
// repetitions of the type entry (which always exists)
@ -125,11 +125,11 @@ impl SignedPodVerifyTarget {
// MainPod verification
//
struct OperationVerifyGate {
struct OperationVerifyGadget {
params: Params,
}
impl OperationVerifyGate {
impl OperationVerifyGadget {
fn eval(
&self,
builder: &mut CircuitBuilder<F, D>,
@ -359,17 +359,17 @@ impl OperationVerifyTarget {
}
}
struct MainPodVerifyGate {
struct MainPodVerifyGadget {
params: Params,
}
impl MainPodVerifyGate {
impl MainPodVerifyGadget {
fn eval(&self, builder: &mut CircuitBuilder<F, D>) -> Result<MainPodVerifyTarget> {
let params = &self.params;
// 1. Verify all input signed pods
let mut signed_pods = Vec::new();
for _ in 0..params.max_input_signed_pods {
let signed_pod = SignedPodVerifyGate {
let signed_pod = SignedPodVerifyGadget {
params: params.clone(),
}
.eval(builder)?;
@ -421,7 +421,7 @@ impl MainPodVerifyGate {
let mut op_verifications = Vec::new();
for (i, (st, op)) in input_statements.iter().zip(operations.iter()).enumerate() {
let prev_statements = &statements[..input_statements_offset + i - 1];
let op_verification = OperationVerifyGate {
let op_verification = OperationVerifyGadget {
params: params.clone(),
}
.eval(builder, st, op, prev_statements)?;
@ -478,7 +478,7 @@ pub struct MainPodVerifyCircuit {
impl MainPodVerifyCircuit {
pub fn eval(&self, builder: &mut CircuitBuilder<F, D>) -> Result<MainPodVerifyTarget> {
let main_pod = MainPodVerifyGate {
let main_pod = MainPodVerifyGadget {
params: self.params.clone(),
}
.eval(builder)?;
@ -505,7 +505,7 @@ mod tests {
let config = CircuitConfig::standard_recursion_config();
let mut builder = CircuitBuilder::<F, D>::new(config);
let signed_pod_verify = SignedPodVerifyGate { params }.eval(&mut builder)?;
let signed_pod_verify = SignedPodVerifyGadget { params }.eval(&mut builder)?;
let mut pw = PartialWitness::<F>::new();
let kvs = [
@ -543,7 +543,7 @@ mod tests {
.map(|_| builder.add_virtual_statement(&params))
.collect();
let operation_verify = OperationVerifyGate {
let operation_verify = OperationVerifyGadget {
params: params.clone(),
}
.eval(