Jump to Navigation

Me on Twitter

  • @GroupeLaPoste Bravo pour https://t.co/cBOQQDdlVq Le facteur est venu vérifier mon identité en 24h et mon identité… https://t.co/xixwTwxsCF 30 weeks 2 days ago
  • Soooo true.... https://t.co/vhEsNGV0uQ 31 weeks 2 days ago
  • @ak_anneka Je découvre ton travail : c'est génial et ça donne envie d'en avoir un chez soi ! 31 weeks 6 days ago
  • RT @ak_anneka: Je l'ai terminé ! I did it, I did it, yeah! #art #ink #artist #bird #tiny #objects #doodle #fun #color #red #yellow #ooak ht… 31 weeks 6 days ago
  • RT @Devoxx: 34 weeks 3 hours ago
  • RT @esa: Our week in #space images, featuring an Earth view taken by @Astro_Alex on the Space Station, the #Aeolus satellite's Vega rocket… 34 weeks 5 days ago
  • Wow.... Huge reservoir of liquid water detected under the surface of Mars https://t.co/PsJpjY7uFC via @AAAS @EurekAlert 38 weeks 1 day ago
  • RT @ChromiumDev: 38 weeks 2 days ago
  • RT @rupl: 39 weeks 18 hours ago
  • Sorry @instapaper I can't wait any longer for you to be back online for Europeans. I'm back to @Pocket 44 weeks 3 days ago

cryptography

android A paper backup for your private key

Android keychainAndroid requires developers to sign their applications with a digital certificate and that each future release be signed with the same certificate.

Sadly, bad things happen when the developer (you) looses access to the certificate : he (you) will not be able to release updates for the application without it. NeverEver.

Android does not currently support multiple certificates per application so the best you could do would be to release a new app with the same name, in the hope your users will find a way to it by themselves.

As years go on, you will change your computer, wipe USB keys, reinstall OS, ...
So many dangerous operations for your digital certificates, hidden among millions of files !
If, like me, you are anxious at the idea of losing your certificates or passwords, just print a paper copy !
Although it is not invulnerable, paper should be less prone to mass erasing than a simple electronic file.

The idea is simplenot new, and you just need to know two commands to get a printable hard copy of your certificate.

Let's start.

java HttpClient 3.x : a portable SSL Socket Factory implementation

I was just trying to implement client and server authentication over SSL on IBM Websphere 6 (JRE 1.4.2)...

[...]

It may sound awkward in 2012, but if you wish the HTTPS server to identify your Java client (versus : only the server is identified), you will have to write your own implementation of a socket factory.

The Java Runtime Environment doesn't provide ready-to-use classes to do this. Yes : there is javax.net.ssl.SSLSocketFactory.getDefault() but it requires to set some system (therefore global) properties to point to the certificates files !!!

Even with Apache's HttpClient (at least version 3.x), you have to use a custom SSLProtocolSocketFactory.

The HttpClient SSL Guide provides sample code to implement mutual client and server authentication ; unfortunately the latest stable release of it (contrib 3.1) is bound to Sun's API with imports such as com.sun.net.ssl.KeyManagerFactory. Needless to say that this will not work on an IBM Websphere JRE...

This article contains an implementation of a SSLProtocolSocketFactory for HttpClient, to whom may be interested...

Syndicate content