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[Łukasz Zemczak <1739631@xxxxxxxxxxxxxxxxxx>]

The verification of the Stable Release Update for ca-certificates-java
has completed successfully and the package has now been released to
-updates.  Subsequently, the Ubuntu Stable Release Updates Team is being
unsubscribed and will not receive messages about this bug report.  In
the event that you encounter a regression using the package from
-updates please report a new bug using ubuntu-bug and tag the bug report
regression-update so we can easily find any regressions.

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https://bugs.launchpad.net/bugs/1739631

Title:
  Fresh install with JDK 9 can't use the generated PKCS12 cacerts
  keystore file

Status in ca-certificates-java package in Ubuntu:
  Fix Released
Status in ca-certificates-java source package in Bionic:
  Fix Released
Status in ca-certificates-java package in Debian:
  Fix Released

Bug description:
  [Impact]
  Any user doing a new install can be affected as soon as they install any openjdk-11 package.

  [Cause]
  The ca-certificate-java version 20170930 (or earlier) used OpenJDK's default keystore to create /etc/ssl/certs/java/cacerts - if the file already existed its contents were just updated without changing the keystore type.

  From openjdk-9 upwards the default keystore type changed from 'jks' to
  'pkcs12' [1] by means of JEP 229 [2]. A JKS keystore can be read
  without supplying a password (or by supplying an empty one) while a
  PKCS12 keystore requires a password to be set.

  Thus a /etc/ssl/certs/java/cacerts created in the pkcs12 format will
  fail to be loaded as, by default, the truststore password is empty -
  in order to avoid that the user must set
  -Djavax.net.ssl.trustStorePassword=<passwd> or define it in /etc/java-
  XX-openjdk/management/management.properties. A JKS keystore will work
  normally, as the certificates in it can be ready when the truststore
  password is empty.

  Ubuntu does *not* set the javax.net.ssl.trustStorePassword by default
  thus any user that got a cacerts generated in JKCS12 won't be able
  to use any secure connections from java.

  [Test Case - Fix not applied]
  Start on a new bionic install/chroot without openjdk

  1. Install openjdk-11
  $ sudo apt-get install openjdk-11-jdk

  2. Test the keystore with an empty password (optional) and make sure it is a PKCS12
  $ keytool -list -cacerts
  Enter keystore password: <leave empty>
  ***************** WARNING WARNING WARNING *****************
  * The integrity of the information stored in your keystore *
  * has NOT been verified! In order to verify its integrity, *
  * you must provide your keystore password. *
  ***************** WARNING WARNING WARNING *****************
  Keystore type: PKCS12
  Keystore provider: SUN
  Your keystore contains 0 entries

  3. Test with the "changeit" password
  $ keytool -list -cacerts
  Enter keystore password: changeit
  Keystore type: PKCS12
  Keystore provider: SUN
  Your keystore contains 133 entries
  <snipped various certs>

  4. Create the java test file
  $ cat <<EOF >HttpsTester.java
  import java.net.URL;
  import javax.net.ssl.HttpsURLConnection;
  public class HttpsTester {
  public static void main(String[] args) throws java.io.IOException {
  HttpsURLConnection connection = (HttpsURLConnection) new URL("https://www.ubuntu.com";).openConnection();
  System.out.println("Response code: " + connection.getResponseCode());
  System.out.println("It worked!");
  }
  }
  EOF

  5. Compile it
  $ javac HttpsTester.java

  6. Call it
  $ /usr/lib/jvm/java-11-openjdk-amd64/bin/java HttpsTester

  7. Call it again, this time set the store password
  $ /usr/lib/jvm/java-11-openjdk-amd64/bin/java \
    -Djavax.net.ssl.trustStorePassword=changeit HttpsTester
  Response code: 200
  It worked!

  [Test Case - Fix applied]
  Start on a new bionic install/chroot without openjdk

  1. Install openjdk-11
  $ sudo apt-get install openjdk-11-jdk

  2. Test the keystore with an empty password (optional) and make sure it is a JKS
  $ keytool -list -cacerts
  Enter keystore password:
  ***************** WARNING WARNING WARNING *****************
  * The integrity of the information stored in your keystore *
  * has NOT been verified! In order to verify its integrity, *
  * you must provide your keystore password. *
  ***************** WARNING WARNING WARNING *****************
  Keystore type: JKS
  Keystore provider: SUN
  Your keystore contains 133 entries
  <snipped various certs>

  3. Test with the "changeit" password
  keytool -list -cacerts
  Enter keystore password: changeit
  Keystore type: JKS
  Keystore provider: SUN
  Your keystore contains 133 entries
  <snipped various certs>

  4. Create the java test file
  $ cat <<EOF >HttpsTester.java
  import java.net.URL;
  import javax.net.ssl.HttpsURLConnection;
  public class HttpsTester {
  public static void main(String[] args) throws java.io.IOException {
  HttpsURLConnection connection = (HttpsURLConnection) new URL("https://www.ubuntu.com";).openConnection();
  System.out.println("Response code: " + connection.getResponseCode());
  System.out.println("It worked!");
  }
  }
  EOF

  5. Compile it
  $ javac HttpsTester.java

  6. Call it
  $ /usr/lib/jvm/java-11-openjdk-amd64/bin/java HttpsTester
  Response code: 200
  It worked!

  7. Call it again, this time set the store password
  $ /usr/lib/jvm/java-11-openjdk-amd64/bin/java \
    -Djavax.net.ssl.trustStorePassword=changeit HttpsTester
  Response code: 200
  It worked!

  [Regression Potential]
  * Forcing ca-certificates-java to create the keystore in the old default JKS format does not cause any regressions, only forces the system to behave as it did before openjdk-9 changed the default keystore from JKS to PKCS12.

  [References]
  [1] The default keystore is defined by the keystore.type in the
  /etc/java-XX-openjdk/security/java.security file.
  http://hg.openjdk.java.net/jdk-updates/jdk9u/jdk/annotate/46bd35a597eb/src/java.base/share/conf/security/java.security#l186

  [2] JEP 229: Create PKCS12 Keystores by Default
  http://openjdk.java.net/jeps/229

  [Original bug description]
  I ran into a problem after doing approximately the following on an install of Ubuntu 17.10:

  sudo apt-get install openjdk-9-jdk maven ca-certificates-java

  Running "mvn package" on my own project threw this error without
  downloading anything:

  java.security.InvalidAlgorithmParameterException: the trustAnchors
  parameter must be non-empty

  It seems that all TLS connections fail due to missing trust anchors in
  Java 9!

  After some investigation, I discovered that the JDK's
  lib/security/cacerts is a symlink to /etc/ssl/certs/java/cacerts,
  which is provided by ca-certificates-java package. This file appeared
  to be a PKCS12 file with password "changeit" protecting it. I was able
  to list its contents using both keytool -list -cacerts and openssl
  pkcs12 -in cacerts with that password, confirming that the file
  actually did hold the certificates. Regardless, Java 9 was not able to
  use the contents of this file for whatever reason.

  To workaround the issue, I downgraded to openjdk-8-jdk, did rm
  /etc/ssl/certs/java/cacerts, then did update-ca-certificates -f, then
  upgraded back to openjdk-9-jdk. The old Java 8 -generated JKS file
  with empty string as password was usable in the Java 9, permitting mvn
  and other things to make TLS connections again.

  The problem can be reintroduced by having java 9 installed and doing
  rm /etc/ssl/certs/java/cacerts and then update-ca-certificates -f.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ca-certificates-java 20170930
  ProcVersionSignature: Ubuntu 4.13.0-21.24-generic 4.13.13
  Uname: Linux 4.13.0-21-generic x86_64
  ApportVersion: 2.20.8-0ubuntu5
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Dec 21 17:36:05 2017
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2017-12-21 (0 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fi_FI.UTF-8
   SHELL=/bin/bash
  SourcePackage: ca-certificates-java
  UpgradeStatus: Upgraded to bionic on 2017-12-21 (0 days ago)
  modified.conffile..etc.default.cacerts: [inaccessible: [Errno 13] Lupa evätty: '/etc/default/cacerts']

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