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• How to verify signatures for Piwik release packages

  19 novembre 2014, par Piwik Core Team — Security

  We are proud to announce that Piwik project now cryptographically signs the Piwik releases using PGP following requests from several community members. In this post we will explain how you can verify the signatures of the Piwik release you downloaded, with instructions for Windows, Mac OS X and Linux.

  What is a signature and why should I check it ?

  ---

  How do you know that the Piwik platform you have is really the one we made ? Some software sites list sha1 hashes alongside the software on their website, so users can verify that they downloaded the file without any errors. These “checksums” help you answer the question “Did I download this file correctly from whoever sent it to me ?” They do a good job at making sure you didn’t have any random errors in your download, but they don’t help you figure out whether you were downloading it from a compromised server. The better question to answer is : “Is this file that I just downloaded the file that Piwik intended me to get ?”. Over the years several Piwik users have requested that we start signing our releases.

  Where do I get the signatures and the keys that made them ?

  ---

  Each file on our release server builds.piwik.org is accompanied by a file with the same name as the package and the extension .asc. These .asc files are GPG signatures. They allow you to verify the file you’ve downloaded is exactly the one that we intended you to get. For example, piwik-2.9.0.zip is accompanied by piwik-2.9.0.zip.asc<code>.

  Currently Matthieu Aubry is the release manager and signs the Piwik releases. His signature can be found here : builds.piwik.org/signature.asc

  How to verify signatures on Windows

  ---

  You need to have GnuPG installed before you can verify signatures. Download it from http://gpg4win.org/download.html.

  Once it’s installed, use GnuPG to import the key that signed your package. Since GnuPG for Windows is a command-line tool, you will need to use cmd.exe. Unless you edit your PATH environment variable, you will need to tell Windows the full path to the GnuPG program. If you installed GnuPG with the default values, the path should be something like this : C :\Program Files\Gnu\GnuPg\gpg.exe.

  Import Piwik Release manager Matthieu’s key (0x416F061063FEE659) by starting cmd.exe and typing :

  "C :\Program Files\Gnu\GnuPg\gpg.exe" —keyserver keys.gnupg.net —recv-keys 814E346FA01A20DBB04B6807B5DBD5925590A237

  After importing the key, you can verify that the fingerprint is correct :

  "C :\Program Files\Gnu\GnuPg\gpg.exe" —fingerprint 814E346FA01A20DBB04B6807B5DBD5925590A237

  You should see :

  pub   4096R/5590A237 2013-07-24
        Key fingerprint = 814E 346F A01A 20DB B04B  6807 B5DB D592 5590 A237
  uid                  Matthieu Aubry <matt@piwik.org>
  uid                  Matthieu Aubry <matthieu.aubry@gmail.com>
  uid                  Matthieu Aubry <matt@piwik.pro>
  sub   4096R/43F0D330 2013-07-24
  

  To verify the signature of the package you downloaded, you will need to download the ".asc" file as well. Assuming you downloaded the package and its signature to your Desktop, run :

  "C :\Program Files\Gnu\GnuPg\gpg.exe" —verify C :\Users\Alice\Desktop\piwik-2.9.0.zip.asc C :\Users\Alice\Desktop\piwik-2.9.0.zip

  The output should say "Good signature" :

  gpg : Signature made Thu 13 Nov 2014 17:42:18 NZDT using RSA key ID 5590A237
  gpg : Good signature from "Matthieu Aubry <matt@piwik.org>"
  gpg :                 aka "Matthieu Aubry <matthieu.aubry@gmail.com>"
  gpg :                 aka "Matthieu Aubry <matt@piwik.pro>"
  

  Notice that there may be a warning in case you haven’t assigned a trust index to this person. This means that GnuPG verified that the key made that signature, but it’s up to you to decide if that key really belongs to the developer. The best method is to meet the developer in person and exchange key fingerprints.

  Mac OS X and Linux

  ---

  On Linux GnuPG is usually installed by default. On Mac OS X, you need to have GnuPG installed before you can verify signatures. You can install it from http://www.gpgtools.org/.

  Once it’s installed, use GnuPG to import the key that signed your package. Matthieu Aubry signs the Piwik releases. Import his key (814E346FA01A20DBB04B6807B5DBD5925590A237) by starting the terminal (under "Applications") and typing :

  gpg —keyserver keys.gnupg.net —recv-keys 814E346FA01A20DBB04B6807B5DBD5925590A237

  After importing the key, you can verify that the fingerprint is correct :

  gpg —fingerprint 814E346FA01A20DBB04B6807B5DBD5925590A237

  You should see :

  pub   4096R/5590A237 2013-07-24
        Key fingerprint = 814E 346F A01A 20DB B04B  6807 B5DB D592 5590 A237
  uid                  Matthieu Aubry <matt@piwik.org>
  uid                  Matthieu Aubry <matthieu.aubry@gmail.com>
  uid                  Matthieu Aubry <matt@piwik.pro>
  sub   4096R/43F0D330 2013-07-24
  

  To verify the signature of the package you downloaded, you will need to download the ".asc" file as well. Assuming you downloaded the package and its signature to your Desktop, run :

  gpg —verify /Users/Alice/piwik-2.9.0.zip.asc*,

  The output should say "Good signature" :

  gpg : Signature made Thu 13 Nov 2014 17:42:18 NZDT using RSA key ID 5590A237
  gpg : Good signature from "Matthieu Aubry <matt@piwik.org>"
  gpg :                 aka "Matthieu Aubry <matthieu.aubry@gmail.com>"
  gpg :                 aka "Matthieu Aubry <matt@piwik.pro>"
  

  Notice that there may be a warning in case you haven’t assigned a trust index to this person. This means that GnuPG verified that the key made that signature, but it’s up to you to decide if that key really belongs to the developer. The best method is to meet the developer in person and exchange key fingerprints.

  That’s it ! In this article you have learnt how you can verify that the Piwik package you have downloaded on your computer was the same as the one Piwik team has officially created. We hope this helps you use Piwik with more security.

  Source : this article was copied and adapted from the great Tor Browser project website page How to verify signatures for Tor packages

• avcodec/microdvddec : support non persistent italic marker ’/’

  23 novembre 2014, par Clément Bœsch

  avcodec/microdvddec : support non persistent italic marker ’/’
  Inspired from a patch by Michal Wazgird <mplayer@cyryl.net>
  See https://lists.mplayerhq.hu/pipermail/mplayer-dev-eng/2014-November/072772.html
  

  • [DH] libavcodec/microdvddec.c

• How to write unit tests for your plugin – Introducing the Piwik Platform

  17 novembre 2014, par Thomas Steur — Development

  This is the next post of our blog series where we introduce the capabilities of the Piwik platform (our previous post was How to verify user permissions). This time you’ll learn how to write unit tests in Piwik. For this tutorial you will need to have basic knowledge of PHP, PHPUnit and the Piwik platform.

  When is a test a unit test ?

  There are many different opinions on this and it can be sometimes hard to decide. At Piwik we consider a test as a unit test if only a single method or class is being tested and if a test does not have a dependency to the filesystem, web, config, database or to any other plugin.

  If a test is slow it can be an indicator that it is not a unit test. “Slow” is of course a bit vague. We will cover how to write other type of tests, such as integration tests, in one of our next blog posts.

  Getting started

  In this post, we assume that you have already installed Piwik 2.9.0 or later via git, set up your development environment and created a plugin. If not, visit the Piwik Developer Zone where you’ll find the tutorial Setting up Piwik and other Guides that help you to develop a plugin.

  Let’s create a unit test

  We start by using the Piwik Console to create a new unit test :

  ./console generate:test --testtype unit

  The command will ask you to enter the name of the plugin the created test should belong to. I will use the plugin name “Insights”. Next it will ask you for the name of the test. Here you usually enter the name of the class you want to test. I will use “Widgets” in this example. There should now be a file plugins/Insights/tests/Unit/WidgetsTest.php which contains already an example to get you started easily :

  /**
   * @group Insights
   * @group WidgetsTest
   * @group Plugins
   */
  class WidgetsTest extends \PHPUnit_Framework_TestCase
  {
   
      public function testSimpleAddition()
      {
          $this->assertEquals(2, 1+1);
      }
   
  }
  Télécharger

  We don’t want to cover how you should write your unit test. This is totally up to you. If you have no experience in writing unit tests yet, we recommend to read articles on the topic, or a book, or to watch videos or anything else that will help you learn best.

  Running a test

  To run a test we will use the command tests:run which allows you to execute a test suite, a specific file or a group of tests.

  To verify whether the created test works we will run it as follows :

  ./console tests:run WidgetsTest

  This will run all tests having the group WidgetsTest. As other tests can use the same group you might want to pass the path to your test file instead :

  ./console tests:run plugins/Insights/tests/Unit/Widgets.php

  If you want to run all tests within your plugin pass the name of your plugin as an argument :

  ./console tests:run insights

  Of course you can also define multiple arguments :

  ./console tests:run insights WidgetsTest

  This will execute all tests within the insights plugin having the group WidgetsTest. If you only want to run unit tests within your plugin you can do the following :

  ./console tests:run insights unit

  Advanced features

  Isn’t it easy to create a unit test ? We never even created a file ! You can accomplish even more if you want : You can generate other type of tests, you can run tests on Amazon’s AWS and more. Unfortunately, not everything is documented yet so we recommend to discover more features by executing the commands ./console list tests and ./console help tests:run.

  If you have any feedback regarding our APIs or our guides in the Developer Zone feel free to send it to us.