[jdev] How to build "response" in sasl digest MD5

[IRcapmail]

%Y = $hex2chr($md5(%X))

returns:  …CV

Can you tell the correct valour for testuser456:jabber.org:pass456 to 
compare ?



Norman Rasmussen escribió:
> On Thu, Feb 18, 2010 at 2:37 PM, IRcapmail <ircapmail at yahoo.es> wrote:
> 
>> Thank you, Waqas.
>>
>> I have fixed step 3, but I don't know how to compute the 16 octect in step
>> 2. The $md5(X) always returns 32 characters. I have tried to get the first
>> 16 and last 16 characters, but the response is wrong.
>>
> 
>  it sounds like this is returning md5hex, and not the raw characters.  You
> need to convert the 32 chars into 16 octects using hex2chr as shown here:
> http://www.hawkee.mobi/snippet/6505/
> 
> I don't know if its a limitation of the mIRC's language and its possible to
>> create md5 hashes with 16 chars in others more "professional" languages, or
>> I'm doing something wrong.
>>
>>
>> Waqas Hussain escribió:
>>
>>> On Thu, Feb 18, 2010 at 4:04 AM, IRcapmail <ircapmail at yahoo.es> wrote:
>>>
>>>  2. Compute the 16 octet MD5 hash of X. Call the result Y.
>>>> %Y = $md5(%X)
>>>>
>>>> Result= 85434cc70bb832bc456c27834bfa5d25
>>>>
>>>>
>>>>  This is incorrect. You need 16 octets, but your result is 32 octets.
>>> Don't
>>> hex encode in this step.
>>>
>>>
>>>
>>>> 3. Create a string of the form "Y:nonce:cnonce:authzid". Call this string
>>>> A1.
>>>>
>>>> %A1 = %Y $+
>>>>
>>>> :x8djfKCd/aoKCUIeI5IwN0lNGzs91oSdMCR7SZT6L9s=:EzAaOdnJwGDj2ABlUat3a1ZPeH06Pyzic6PpnVnqkBE=:
>>>> testuser456 at jabber.org/Psi
>>>>
>>>> Result=
>>>>
>>>> 85434cc70bb832bc456c27834bfa5d25:x8djfKCd/aoKCUIeI5IwN0lNGzs91oSdMCR7SZT6L9s=:EzAaOdnJwGDj2ABlUat3a1ZPeH06Pyzic6PpnVnqkBE=:
>>>> testuser456 at jabber.org/Psi
>>>>
>>>>
>>>>  You are including an authzid here, Psi didn't. When there is no authzid,
>>> you
>>> use:
>>> A1 = Y:nonce:cnonce
>>>
>>> A note about authzid: You must not provide an authzid when it's the same
>>> as
>>> the JID you are logging in with. And when provided, it has to be a bare
>>> JID.
>>> See the spec:
>>>
>>> http://xmpp.org/internet-drafts/draft-ietf-xmpp-3920bis-04.html#sasl-rules-authzid
>>>
>>> The rest of your code is correct, and I managed to get the correct result
>>> with the above two fixes.
>>>
>>> --
>>> Waqas Hussain
>>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
>>>
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