gnosis/lighthouse
1
0
Fork 0
mirror of https://github.com/sigp/lighthouse.git synced 2026-05-31 21:27:12 +00:00
Code Issues Packages Projects Releases Wiki Activity

Expose blst internals (#6829)

Browse Source
This commit is contained in:
Daniel Knopik
2025-02-24 04:39:20 +01:00
committed by GitHub
parent 01df433dfd
commit 60964fc7b5
6 changed files with 101 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
crypto/bls/src/generic_signature.rs
View File

@@ -14,6 +14,9 @@ use tree_hash::TreeHash;
/// The byte-length of a BLS signature when serialized in compressed form.
pub const SIGNATURE_BYTES_LEN: usize = 96;
/// The byte-length of a BLS signature when serialized in uncompressed form.
pub const SIGNATURE_UNCOMPRESSED_BYTES_LEN: usize = 192;
/// Represents the signature at infinity.
pub const INFINITY_SIGNATURE: [u8; SIGNATURE_BYTES_LEN] = [
0xc0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -22,6 +25,16 @@ pub const INFINITY_SIGNATURE: [u8; SIGNATURE_BYTES_LEN] = [
0,
];
pub const INFINITY_SIGNATURE_UNCOMPRESSED: [u8; SIGNATURE_UNCOMPRESSED_BYTES_LEN] = [
0x40, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0,
];
/// The compressed bytes used to represent `GenericSignature::empty()`.
pub const NONE_SIGNATURE: [u8; SIGNATURE_BYTES_LEN] = [0; SIGNATURE_BYTES_LEN];
@@ -31,9 +44,15 @@ pub trait TSignature<GenericPublicKey>: Sized + Clone {
/// Serialize `self` as compressed bytes.
fn serialize(&self) -> [u8; SIGNATURE_BYTES_LEN];
/// Serialize `self` as uncompressed bytes.
fn serialize_uncompressed(&self) -> [u8; SIGNATURE_UNCOMPRESSED_BYTES_LEN];
/// Deserialize `self` from compressed bytes.
fn deserialize(bytes: &[u8]) -> Result<Self, Error>;
/// Serialize `self` from uncompressed bytes.
fn deserialize_uncompressed(bytes: &[u8]) -> Result<Self, Error>;
/// Returns `true` if `self` is a signature across `msg` by `pubkey`.
fn verify(&self, pubkey: &GenericPublicKey, msg: Hash256) -> bool;
}
@@ -93,12 +112,12 @@ where
}
/// Returns a reference to the underlying BLS point.
pub(crate) fn point(&self) -> Option<&Sig> {
pub fn point(&self) -> Option<&Sig> {
self.point.as_ref()
}
/// Instantiates `Self` from a `point`.
pub(crate) fn from_point(point: Sig, is_infinity: bool) -> Self {
pub fn from_point(point: Sig, is_infinity: bool) -> Self {
Self {
point: Some(point),
is_infinity,
@@ -115,6 +134,13 @@ where
}
}
/// Serialize `self` as compressed bytes.
pub fn serialize_uncompressed(&self) -> Option<[u8; SIGNATURE_UNCOMPRESSED_BYTES_LEN]> {
self.point
.as_ref()
.map(|point| point.serialize_uncompressed())
}
/// Deserialize `self` from compressed bytes.
pub fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
let point = if bytes == &NONE_SIGNATURE[..] {
@@ -129,6 +155,17 @@ where
_phantom: PhantomData,
})
}
/// Deserialize `self` from uncompressed bytes.
pub fn deserialize_uncompressed(bytes: &[u8]) -> Result<Self, Error> {
// The "none signature" is a beacon chain concept. As we never directly deal with
// uncompressed signatures on the beacon chain, it does not apply here.
Ok(Self {
point: Some(Sig::deserialize_uncompressed(bytes)?),
is_infinity: bytes == &INFINITY_SIGNATURE_UNCOMPRESSED[..],
_phantom: PhantomData,
})
}
}
impl<Pub, Sig> GenericSignature<Pub, Sig>