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rust-bitcoin-unsafe-fast
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PSBT: Improved global keys version and xpub handling

This commit is contained in:
Dr Maxim Orlovsky 2020-12-16 16:46:28 +01:00
parent 21c11e3315
commit b84faa7f5e
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GPG Key ID: FFC0250947E5C6F7
1 changed files with 8 additions and 6 deletions
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14
src/util/psbt/map/global.rs
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@ -263,15 +263,15 @@ impl Decodable for Global {
"Can't deserialize ExtendedPublicKey from global XPUB key data"
))?;
if pair.value.len() % 4 != 0 {
return Err(encode::Error::ParseFailed("Incorrect length of global xpub list"))
if pair.value.is_empty() || pair.value.len() % 4 != 0 {
return Err(encode::Error::ParseFailed("Incorrect length of global xpub derivation data"))
}
let keys_count = pair.value.len() / 4 - 1;
let child_count = pair.value.len() / 4 - 1;
let mut decoder = Cursor::new(pair.value);
let mut fingerprint = [0u8; 4];
decoder.read_exact(&mut fingerprint[..])?;
let mut path = Vec::<ChildNumber>::with_capacity(keys_count);
let mut path = Vec::<ChildNumber>::with_capacity(child_count);
while let Ok(index) = u32::consensus_decode(&mut decoder) {
path.push(ChildNumber::from(index))
}
@ -295,8 +295,10 @@ impl Decodable for Global {
return Err(encode::Error::ParseFailed("Wrong global version value length (must be 4 bytes)"))
}
version = Some(Decodable::consensus_decode(&mut decoder)?);
if decoder.position() != vlen as u64 {
return Err(encode::Error::ParseFailed("data not consumed entirely when explicitly deserializing"))
// We only understand version 0 PSBTs. According to BIP-174 we
// should throw an error if we see anything other than version 0.
if version != Some(0) {
return Err(encode::Error::ParseFailed("PSBT versions greater than 0 are not supported"))
}
} else {
return Err(Error::DuplicateKey(pair.key).into())