f Use write_volatile

Author: tnull

src/util/key_obfuscator.rs

@@ -155,8 +155,17 @@ impl KeyObfuscator {
 impl Drop for KeyObfuscator {
 	fn drop(&mut self) {
 		// Zeroize the owned keys
-		self.obfuscation_key.copy_from_slice(&[0u8; KEY_LENGTH]);
-		self.hashing_key.copy_from_slice(&[0u8; KEY_LENGTH]);
+		for elem in self.obfuscation_key.iter_mut() {
+			unsafe {
+				::core::ptr::write_volatile(elem, 0);
+			}
+		}
+		for elem in self.hashing_key.iter_mut() {
+			unsafe {
+				::core::ptr::write_volatile(elem, 0);
+			}
+		}
+		::core::sync::atomic::compiler_fence(::core::sync::atomic::Ordering::SeqCst);
 	}
 }