synapsenstau

full TLS v1.2 support

7 posts in this topic

Hi,

 

would u like to add the complete TLS v1.2 support in your client? and not the castrate DC++ version (only AES128 and not AES256). Apex based on DC++ but they will not changing to the full enryption in the next time.

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Hi synapsenstau,

 

When you say full TLS 1.2 support, can you give examples of what you feel is missing and relevant? There are security reasons for the "castrated" cipher suite we use; in fact we actually support more ciphers than DC++ at this time, but are looking into following their lead.

 

Hope this helps.

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Hi Lee,

 

First of all, good job with the ApexDC, it's a compfortable and stable client, i have use it over 2 years without any problems.

In the next few weeks we change the TLS protocal in Luadch from TLSv1 to TLSv1.2 and i think the reason for this should be clear.

With TLSv1.2 we can use ciphers like ECDHE-RSA-AES256-GCM-SHA384 or others that only runs with TSLv1.2. In this context there are some problems we need to solve:

 

Problem 1: The most client based on DC++ (ApexDC too) and DC++ has indeed TLSv1.2 support but these guys disable it, don't ask me why^^ And so the most DC++ based clients has a disabled TLSv1.2 too (inherited). And as if that were not enough, here the next problem:

 

Problem 2: DC++ has a limitation to AES128 bit ciphers (they call them "reasonable TLS ciphersuites" no joke, here are the code: http://sourceforge.net/p/dcplusplus/code/ci/5c967fcb1ff9a0aa9886a8e65cdbfab1afe9bda4/) and yes the most DC++ based clients has this problem too (inherited).

 

Whatever, the AirDC developers disabled this imho rediculous limitation (here are the code: https://github.com/airdcpp/airgit/commit/b0826716ae4ae22fc006e5aecf06d9a2e99f7310) and supports TLSv1.2 in the new 3.00a versions too.

Here are a small list with popular clients:

 

   Windows Clients:

      DC++                TLSv1.2 Support:  YES in Version: 0.850 or higher (but uses a AES128 cipher limitation)
      AirDC++            TLSv1.2 Support:  YES in Version: 3.00a-29 or higher (no cipher limitation)
      StrongDC++      TLSv1.2 Support:  NO
      ApexDC++        TLSv1.2 Support:  NO
      RSX++              TLSv1.2 Support:  NO
      SmVDC++         TLSv1.2 Support:  NO
      DC@fe++          TLSv1.2 Support:  NO

    Linux/Unix Clients:

      jucy (uc)             TLSv1.2 Support:  YES in Version: 0.87 or higher (no cipher limitation)
      EiskaltDC++       TLSv1.2 Support:  NO
      LinuxDC++         TLSv1.2 Support:  NO
      NCurses (ncdc)  TLSv1.2 Support:  YES in Version: 1.19.1 or higher (no cipher limitation)
      AirDC Nano        TLSv1.2 Support:  NO (coming soon with no cipher limitation)

 

 

The question what i have to you Lee: Will ApexDC supports TLSv1.2 in the next version? and has it a cipher limitation like DC++?

 

 

greets pulsar

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OpenSSL has absolutely horrible default ciphers, so in that regards AirDC++'s solution is not ideal either (hello null ciphers etc.) OpenSSL has a terrible track record with its default configuration options overall.

 

Also for the record, ApexDC already has TLS 1.2. Just to add AES-256 can in fact be slightly less secure than AES-128, so there is that also.

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Which TLSv1.2 ciphers are allowed in ApexDC?

Edit: removed the listing for future, to avoid outdated information being left here, one can always find the up to date list of ciphers from the source code distribution.

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