From: markt <markt@13f79535-47bb-0310-9956-ffa450edef68>
Date: Fri, 25 Mar 2011 12:20:39 +0000 (+0000)
Subject: Securely seed the SecureRandom instance used for UUID generation and report excessive... 
X-Git-Url: https://git.internetallee.de/?a=commitdiff_plain;h=d9511fde66eded100686899c0d26c81c92451f91;p=tomcat7.0

Securely seed the SecureRandom instance used for UUID generation and report excessive creation time (greater than 100ms) at INFO level.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1085346 13f79535-47bb-0310-9956-ffa450edef68
---

diff --git a/java/org/apache/catalina/tribes/util/LocalStrings.properties b/java/org/apache/catalina/tribes/util/LocalStrings.properties
new file mode 100644
index 000000000..18a05669a
--- /dev/null
+++ b/java/org/apache/catalina/tribes/util/LocalStrings.properties
@@ -0,0 +1,16 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+uuidGenerator.createRandom=Creation of SecureRandom instance for UUID generation using [{0}] took [{1}] milliseconds.
diff --git a/java/org/apache/catalina/tribes/util/UUIDGenerator.java b/java/org/apache/catalina/tribes/util/UUIDGenerator.java
index 2fc83a1c0..581e65c4b 100644
--- a/java/org/apache/catalina/tribes/util/UUIDGenerator.java
+++ b/java/org/apache/catalina/tribes/util/UUIDGenerator.java
@@ -19,12 +19,19 @@ package org.apache.catalina.tribes.util;
 import java.security.SecureRandom;
 import java.util.Random;
 
+import org.apache.juli.logging.Log;
+import org.apache.juli.logging.LogFactory;
+
 /**
  * simple generation of a UUID 
  * @author Filip Hanik
  * @version 1.0
  */
 public class UUIDGenerator {
+    private static final Log log = LogFactory.getLog(UUIDGenerator.class);
+    protected static final StringManager sm =
+        StringManager.getManager("org.apache.catalina.tribes.util");
+
     public static final int UUID_LENGTH = 16;
     public static final int UUID_VERSION = 4;
     public static final int BYTES_PER_INT = 4;
@@ -32,9 +39,17 @@ public class UUIDGenerator {
     
     protected static SecureRandom secrand = null;
     protected static Random rand = new Random();
+    
     static {
+        long start = System.currentTimeMillis();
         secrand = new SecureRandom();
-        secrand.setSeed(rand.nextLong());
+        // seed the generator
+        secrand.nextInt();
+        long time = System.currentTimeMillis() - start;
+        if (time > 100) {
+            log.info(sm.getString("uuidGenerator.createRandom",
+                    secrand.getAlgorithm(), Long.valueOf(time)));
+        }
     }
     
     public static byte[] randomUUID(boolean secure) {
diff --git a/webapps/docs/changelog.xml b/webapps/docs/changelog.xml
index b9be91e42..add699375 100644
--- a/webapps/docs/changelog.xml
+++ b/webapps/docs/changelog.xml
@@ -116,6 +116,15 @@
       </fix>
     </changelog>
   </subsection>
+  <subsection name="Cluster">
+    <changelog>
+      <fix>
+        Securely seed the SecureRandom instance used for UUID generation and
+        report excessive creation time (greater than 100ms) at INFO level.
+        (markt)
+      </fix>
+    </changelog>
+  </subsection>
   <subsection name="Web applications">
     <changelog>
       <fix>