[jdev] Reproducability of XEP-0115: Entity Capabilities - 5.3 Complex Generation Example

Peter Saint-Andre stpeter at stpeter.im
Tue Apr 22 11:12:20 CDT 2008

Peter Saint-Andre wrote:
> Peter Saint-Andre wrote:
>> Stephan Maka wrote:
>>> "Sergei Golovan" <sgolovan at nes.ru> wrote:
>>>> I guess spaces are added to allow line breaking. Hash is computed for
>>>> the string without spaces.
>>>>> Look again. I can't even reproduce with the SHA-1 method given in
>>>>>  XEP-0115:
>>>> Remove http://jabber.org/protocol/caps< from a hashed string and
>>>> you'll get the desired hash value.
>>> Great, that works. Thank you very much.
>>>>> Because it is required. Perhaps this is a bug in the XEP?
>>>> It looks like a bug in XEP.
>> Yes, thanks for the bug report. I'll regenerate the hash (clearly the
>> entities support http://jabber.org/protocol/caps so it doesn't make
>> sense to remove that from "S").
> Well, I removed 'http://jabber.org/protocol/caps' from "S" because I
> couldn't duplicate the results any other way. :) Typically I generate
> the hashes using this command:
>   echo -n 'S' | openssl dgst -binary -sha1 | openssl enc -nopad -base64
> However, that doesn't work for this example because it has the Greek
> character Ψ in the string and that character is not properly encoded at
> the command line on my system. IIRC Joe Hildebrand generated that hash
> for me using Jabber-Net.

Well that's stupid, I'm going to fix the examples properly. Plus the Psi
version numbers don't match (0.9.1 vs. 0.11) so I need to correct that.


Peter Saint-Andre

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