Have <ed448::Point as Zeroize>::zeroize yield a well-defined value

Cargo.lock

@@ -4827,7 +4827,7 @@ dependencies = [
 
 [[package]]
 name = "minimal-ed448"
-version = "0.4.1"
+version = "0.4.2"
 dependencies = [
  "ciphersuite",
  "crypto-bigint",

crypto/ed448/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "minimal-ed448"
-version = "0.4.1"
+version = "0.4.2"
 description = "Unaudited, inefficient implementation of Ed448 in Rust"
 license = "MIT"
 repository = "https://github.com/serai-dex/serai/tree/develop/crypto/ed448"

crypto/ed448/src/point.rs

@@ -50,13 +50,25 @@ fn recover_x(y: FieldElement) -> CtOption<FieldElement> {
 }
 
 /// Ed448 point.
-#[derive(Clone, Copy, Debug, Zeroize)]
+#[derive(Clone, Copy, Debug)]
 pub struct Point {
   x: FieldElement,
   y: FieldElement,
   z: FieldElement,
 }
 
+impl Zeroize for Point {
+  fn zeroize(&mut self) {
+    self.x.zeroize();
+    self.y.zeroize();
+    self.z.zeroize();
+    let identity = Self::identity();
+    self.x = identity.x;
+    self.y = identity.y;
+    self.z = identity.z;
+  }
+}
+
 const G: Point = Point { x: G_X, y: G_Y, z: FieldElement::ONE };
 
 impl ConstantTimeEq for Point {