[ciphershed] Re: Still getting security warning on https://ciphershed.org

  • From: Niklas Lemcke - 林樂寬 <compul@xxxxxxxxxxxxxx>
  • To: ciphershed@xxxxxxxxxxxxx
  • Date: Tue, 1 Jul 2014 20:55:46 +0800

On Tue, 1 Jul 2014 10:11:21 +0200
Rocki Hack <rocki.hack@xxxxxxxxx> wrote:

> The problem is that the server cert chain is invalid.
> 
> It sends: StartCom Class _1_ Primary Intermediate Server CA
> (f691fc87efb3135354225a10e127e911d1c7f8cf)
> 
> But should be: StartCom Class _2_ Primary Intermediate Server CA
> (a1ace4046b6e332232b87ecfb6f37a0763720147)

hoppala ~ good catch. :) thanks. It's all good now.

> 
> > Actually, my connection is encrypted with AES-256. Maybe 128bit is a
> setting your browser likes.
> 
> _Server_-preferred order (top-down):
> 
> TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030)   ECDH 521 bits (eq. 15360
> bits RSA)   FS 256  TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)   ECDH
> 521 bits (eq. 15360 bits RSA)   FS    128  TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
> (0x9f)   DH 1024 bits (p: 128, g: 1, Ys: 128)   FS 256
> TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
> (0x9e)   DH 1024 bits (p: 128, g: 1, Ys: 128)   FS      128
> TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
> (0xc028)   ECDH 521 bits (eq. 15360 bits RSA)   FS 256
> TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
> (0xc014)   ECDH 521 bits (eq. 15360 bits RSA)   FS 256
> TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
> (0x6b)   DH 1024 bits (p: 128, g: 1, Ys: 128)   FS 256
> TLS_DHE_RSA_WITH_AES_256_CBC_SHA
> (0x39)   DH 1024 bits (p: 128, g: 1, Ys: 128)   FS 256
> TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
> (0xc027)   ECDH 521 bits (eq. 15360 bits RSA)   FS    128
> TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
> (0xc013)   ECDH 521 bits (eq. 15360 bits RSA)   FS    128
> TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
> (0x67)   DH 1024 bits (p: 128, g: 1, Ys: 128)   FS    128more...
> 
> AES-128 bit key is completely fine because of Diffie Hellman Key Exchange
> (DHE) and Forward secrecy (FS).
> I would _enforce_ forward secrecy and disable 3DES and other ciphers.
> 
> 
> 
> 
> 
> 2014-07-01 7:05 GMT+02:00 Niklas Lemcke - 林樂寬 <compul@xxxxxxxxxxxxxx>:
> 
> > On Mon, 30 Jun 2014 23:26:16 -0400
> > Kyle Marek <psppsn96@xxxxxxxxx> wrote:
> >
> > > On 06/30/2014 11:16 PM, Stephen R Guglielmo wrote:
> > > > On Mon, Jun 30, 2014 at 5:06 PM, Bill Cox <waywardgeek@xxxxxxxxxxxxxx>
> > wrote:
> > > >> I get a security warning about an untrusted certificate when I point
> > > >> FireFox to https://ciphershed.org.  I don't know if this is supposed
> > > >> to still happen or not...
> > > > I don't get an error either right now, using Firefox Beta 31.0. I do,
> > > > however, get this on certain computers at work that are using a very
> > > > outdated version of internet explorer.
> > > >
> > > The SHA1 fingerprint of the certificate i am recieving is
> > > 62:A2:09:4E:DD:A5:6C:E4:09:24:58:59:31:38:15:38:37:0A:4C:A4.
> > >
> > > I also noticed, while checking the fingerprint, the encryption only has
> > > 128-bit keys.
> >
> > Actually, my connection is encrypted with AES-256. Maybe 128bit is a
> > setting your browser likes. Both AES256 and AES128 (and even 3DES) are
> > allowed by the server (gotta think about disabling 3DES maybe).
> >
> > Either way though, AES128 should be perfectly fine, considering that it
> > equals an RSA key length of 3072bit. While the server is sporting a
> > 4096bit RSA key, there is no remotely equivalent AES bitlength (192bit ~
> > 7680bit RSA, which is not available in gpg) to that. So even if we would
> > all encrypt with AES256, we would only get a tad more security because
> > of the limitations of RSA key lengths.
> >
> > Also I have the same fingerprint as you do.
> >
> > >
> > > ------------------------------------------------------------------------
> > >
> > >     At the time of sending this message, I have not been contacted by
> > > any government official or worker regarding my participation in
> > > CipherShed or any related project. I have not been asked to supply any
> > > information to them that may be used to impersonate me nor have I been
> > > asked to aid the government or it's officials or workers in modifying
> > > part of CipherShed or any related project. I am not aware of any of my
> > > property or anything regarding me being bugged, searched, or compromised
> > > in any way. Anything that accepts PGP encryption or signing should have
> > > been cryptographically secured with my PGP key.
> >
> >
> > --
> > Niklas - 林樂寬
> >




-- 
Niklas - 林樂寬

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