Create and use a single SecureRandom instance (#136)

Consensys · Dec 27, 2021 · 5a2c87d · 5a2c87d
1 parent d780ba4
commit 5a2c87d
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/main/java/org/ethereum/beacon/discovery/util/Functions.java b/src/main/java/org/ethereum/beacon/discovery/util/Functions.java
@@ -10,6 +10,8 @@
 import com.google.common.base.MoreObjects;
 import com.google.common.base.Objects;
 import com.google.common.base.Preconditions;
+import com.google.common.base.Supplier;
+import com.google.common.base.Suppliers;
 import java.math.BigInteger;
 import java.nio.ByteOrder;
 import java.security.SecureRandom;
@@ -43,6 +45,8 @@ public class Functions {
   private static final int AUTH_RESP_KEY_LENGTH = 16;
   private static final int MS_IN_SECOND = 1000;
 
+  private static final Supplier<SecureRandom> SECURE_RANDOM = Suppliers.memoize(SecureRandom::new);
+
   /** SHA2 (SHA256) */
   public static Bytes hash(Bytes value) {
     return Hashes.sha256(value);
@@ -207,7 +211,7 @@ public static long getTime() {
 
   /** Random provider */
   public static Random getRandom() {
-    return new SecureRandom();
+    return SECURE_RANDOM.get();
   }
 
   /**