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Harden v5 payment-proof deserialization against malformed input

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ProofWrap::read unwrapped on the sender/receiver address, promise
signature, and memo_type while parsing untrusted slatepack bytes, so a
malformed payment proof would panic the wallet. Propagate CorruptedData
instead, matching the timestamp path already in this function.
This commit is contained in:
jwinterm
2026-06-02 20:58:22 -04:00
parent 46999ce9f5
commit 25dab9fe5b
1 changed files with 9 additions and 4 deletions
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libwallet/src/slate_versions/v5_bin.rs
+9 -4
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@@ -245,8 +245,10 @@ impl<'a> Writeable for ProofWrapRef<'a> {
impl Readable for ProofWrap {
fn read<R: Reader>(reader: &mut R) -> Result<ProofWrap, grin_ser::Error> {
let saddr = DalekPublicKey::from_bytes(&reader.read_fixed_bytes(32)?).unwrap();
let raddr = DalekPublicKey::from_bytes(&reader.read_fixed_bytes(32)?).unwrap();
let saddr = DalekPublicKey::from_bytes(&reader.read_fixed_bytes(32)?)
.map_err(|_| grin_ser::Error::CorruptedData)?;
let raddr = DalekPublicKey::from_bytes(&reader.read_fixed_bytes(32)?)
.map_err(|_| grin_ser::Error::CorruptedData)?;
let ts_raw: i64 = match reader.read_i64() {
Ok(v) => v,
Err(_) => return Err(grin_ser::Error::CorruptedData),
@@ -258,12 +260,15 @@ impl Readable for ProofWrap {
let ts = DateTime::<Utc>::from_utc(ts_opt, Utc);
let psig = match reader.read_u8()? {
0 => None,
1 | _ => Some(DalekSignature::try_from(&reader.read_fixed_bytes(64)?[..]).unwrap()),
1 | _ => Some(
DalekSignature::try_from(&reader.read_fixed_bytes(64)?[..])
.map_err(|_| grin_ser::Error::CorruptedData)?,
),
};
let memo = match reader.read_u8()? {
0 => None,
1 | _ => Some(PaymentMemoV5 {
memo_type: reader.read_u8().unwrap(),
memo_type: reader.read_u8()?,
memo: reader.read_fixed_bytes(32)?.try_into().unwrap_or_default(),
}),
};