Bump voprf to v0.5.0-pre.2 (#304)

src/key_exchange/group/curve25519.rs

@@ -81,7 +81,7 @@ impl KeGroup for Curve25519 {
     }
 
     fn public_key(sk: Self::Sk) -> Self::Pk {
-        (&ED25519_BASEPOINT_TABLE * &sk).to_montgomery()
+        (ED25519_BASEPOINT_TABLE * &sk).to_montgomery()
     }
 
     fn diffie_hellman(pk: Self::Pk, sk: Self::Sk) -> GenericArray<u8, Self::PkLen> {

src/key_exchange/group/ristretto255.rs

@@ -38,11 +38,8 @@ impl KeGroup for Ristretto255 {
     }
 
     fn deserialize_pk(bytes: &[u8]) -> Result<Self::Pk, InternalError> {
-        if bytes.len() != 32 {
-            return Err(InternalError::PointError);
-        }
-
         CompressedRistretto::from_slice(bytes)
+            .map_err(|_| InternalError::PointError)?
             .decompress()
             .filter(|point| point != &RistrettoPoint::identity())
             .ok_or(InternalError::PointError)