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Fix Verifier Key deserialization. #1

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Fix Verifier Key deserialization. #1

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12 changes: 12 additions & 0 deletions halo2_proofs/src/plonk.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -103,9 +103,21 @@ where
format: SerdeFormat,
#[cfg(feature = "circuit-params")] params: ConcreteCircuit::Params,
) -> io::Result<Self> {
// Maximum allowed value for parameter `k`, the log-size of the circuit.
const MAX_CIRCUIT_SIZE: u32 = 32;
let mut k = [0u8; 4];
reader.read_exact(&mut k)?;
let k = u32::from_be_bytes(k);
if k > MAX_CIRCUIT_SIZE {
return Err(io::Error::new(
io::ErrorKind::InvalidData,
format!(
"circuit size value (k): {} exceeds maxium: {}",
k, MAX_CIRCUIT_SIZE
),
));
}

let (domain, cs, _) = keygen::create_domain::<C, ConcreteCircuit>(
k,
#[cfg(feature = "circuit-params")]
Expand Down