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  1. JDK
  2. JDK-8066931

SeedGenerator.getSystemEntropy() fails without network adapters

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    • x86
    • windows_7

      FULL PRODUCT VERSION :
      java version "1.8.0_25"
      Java(TM) SE Runtime Environment (build 1.8.0_25-b18)
      Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows [Version 6.2.9200] (Azure)

      EXTRA RELEVANT SYSTEM CONFIGURATION :
      No network interfaces are available, i.e. "ipconfig" gives "Access denied"

      A DESCRIPTION OF THE PROBLEM :
      When running a Java website on Azure you don't have access to the network interfaces. Since http://hg.openjdk.java.net/jdk8u/jdk8u20/jdk/rev/c6836440c427 the way SecureRandom works is to add the network addresses to the seed hash which causes the application to not work when deployed on Azure. Because no a lot of applications use the SecureRandom class they cannot be used as an Azure web site with the current JDK version.

      Stack trace:
      Exception in thread "main"
      java.lang.Error: IP Helper Library GetIfTable function failed
      at java.net.NetworkInterface.getAll(Native Method)
      at java.net.NetworkInterface.getNetworkInterfaces(NetworkInterface.java:343)
      at sun.security.provider.SeedGenerator.addNetworkAdapterInfo(SeedGenerator.java:233)
      at sun.security.provider.SeedGenerator.access$000(SeedGenerator.java:80)
      at sun.security.provider.SeedGenerator$1.run(SeedGenerator.java:183)
      at sun.security.provider.SeedGenerator$1.run(SeedGenerator.java:168)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.security.provider.SeedGenerator.getSystemEntropy(SeedGenerator.java:168)
      at sun.security.provider.SecureRandom$SeederHolder.<clinit>(SecureRandom.java:201)
      at sun.security.provider.SecureRandom.engineNextBytes(SecureRandom.java:221)
      at java.security.SecureRandom.nextBytes(SecureRandom.java:457)
      at java.security.SecureRandom.next(SecureRandom.java:480)
      at java.util.Random.nextInt(Random.java:329)
      at com.example.Main.main(Main.java:9)

      REGRESSION. Last worked in version 7u51

      ADDITIONAL REGRESSION INFORMATION:
      java version "1.8.0_25"
      Java(TM) SE Runtime Environment (build 1.8.0_25-b18)
      Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      The following application throws an exception on 8u25 but not 7u51:

      package com.example;

      import java.security.SecureRandom;

      public class Main {
      public static void main(String[] args) {
      SecureRandom random = new SecureRandom();

      System.out.println("Random: " + random.nextInt());
      }
      }


      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Should see a result "Random: 12345"
      ACTUAL -
      Exception in thread "main"
      java.lang.Error: IP Helper Library GetIfTable function failed
      at java.net.NetworkInterface.getAll(Native Method)
      at java.net.NetworkInterface.getNetworkInterfaces(NetworkInterface.java:343)
      at sun.security.provider.SeedGenerator.addNetworkAdapterInfo(SeedGenerator.java:233)
      at sun.security.provider.SeedGenerator.access$000(SeedGenerator.java:80)
      at sun.security.provider.SeedGenerator$1.run(SeedGenerator.java:183)
      at sun.security.provider.SeedGenerator$1.run(SeedGenerator.java:168)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.security.provider.SeedGenerator.getSystemEntropy(SeedGenerator.java:168)
      at sun.security.provider.SecureRandom$SeederHolder.<clinit>(SecureRandom.java:201)
      at sun.security.provider.SecureRandom.engineNextBytes(SecureRandom.java:221)
      at java.security.SecureRandom.nextBytes(SecureRandom.java:457)
      at java.security.SecureRandom.next(SecureRandom.java:480)
      at java.util.Random.nextInt(Random.java:329)
      at com.example.Main.main(Main.java:9)

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      package com.example;

      import java.security.SecureRandom;

      public class Main {
      public static void main(String[] args) {
      SecureRandom random = new SecureRandom();

      System.out.println("Random: " + random.nextInt());
      }
      }

      ---------- END SOURCE ----------

            Unassigned Unassigned
            webbuggrp Webbug Group
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              Created:
              Updated:
              Resolved: