absolutebi/serai
1
0
Fork 0
mirror of https://github.com/serai-dex/serai.git synced 2025-12-08 12:19:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

Ban unreduced points in Monero

Browse Source
This commit is contained in:
Luke Parker
2022-07-31 22:46:46 -04:00
parent 6340607827
commit 1c4707136c
1 changed files with 4 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
coins/monero/src/serialize.rs
View File

@@ -85,9 +85,11 @@ pub fn read_scalar<R: io::Read>(r: &mut R) -> io::Result<Scalar> {
} }
pub fn read_point<R: io::Read>(r: &mut R) -> io::Result<EdwardsPoint> { pub fn read_point<R: io::Read>(r: &mut R) -> io::Result<EdwardsPoint> {
CompressedEdwardsY(read_32(r)?) let bytes = read_32(r)?;
CompressedEdwardsY(bytes)
.decompress() .decompress()
.filter(|point| point.is_torsion_free()) // Ban torsioned points, and points which are either unreduced or -0
.filter(|point| point.is_torsion_free() && (point.compress().to_bytes() == bytes))
.ok_or_else(|| io::Error::new(io::ErrorKind::Other, "invalid point")) .ok_or_else(|| io::Error::new(io::ErrorKind::Other, "invalid point"))
} }