[Bug 1455990] Re: quassel-core generates an insecure certificate upon installation

2015-05-18 Thread Luke Faraone
** Information type changed from Public to Public Security

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Title:
  quassel-core generates an insecure certificate upon installation

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[Bug 1455990] Re: quassel-core generates an insecure certificate upon installation

2015-05-18 Thread Felix Geyer
As it's self signed certificate the signature hash algorithm doesn't matter 
much.
4096 bit seems a bit excessive, no?

Slightly offtopic:
Quassel stores the md5sum of certs the user has accepted. That's probably a bad 
idea.

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Title:
  quassel-core generates an insecure certificate upon installation

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Re: [Bug 1455990] Re: quassel-core generates an insecure certificate upon installation

2015-05-18 Thread Scott Kitterman
On Monday, May 18, 2015 09:14:12 PM you wrote:
 While having a 4096-bit certificate is not necessary in order to be
 secure, its only disadvantages are taking longer to generate (which I
 don't think is much of an issue because it doesn't get regenerated very
 often) and taking slightly longer for the handshake (which is
 practically negligible on modern computers).
 
 Yes, saving the md5 of the accepted certs is a bad idea.  I will fix
 that.

People run quassel cores on very minimal systems and so I don't think you can 
say it's necessarily negligible.  If the work someone is doing is so sensitive 
that a 2048 bit key is not sufficient, then it probably shouldn't be on IRC.  
2048 bit keys are sufficient that there's usually easier ways to get the 
information [1].  Let's not go overboard.

[1] https://xkcd.com/538/

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Title:
  quassel-core generates an insecure certificate upon installation

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[Bug 1455990] Re: quassel-core generates an insecure certificate upon installation

2015-05-18 Thread Michael Marley
OK, here is a patch for 2048-bit certificates.  I also discovered that
OpenSSL generates the SHA256 hash automatically now, so there is no need
to specify that explicitly.

** Patch added: certificate.debdiff
   
https://bugs.launchpad.net/ubuntu/+source/quassel/+bug/1455990/+attachment/4399863/+files/certificate.debdiff

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Title:
  quassel-core generates an insecure certificate upon installation

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