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Digest MD5 failing
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simons 2006-07-16, 02:39 #1
User title: Simon shaw
Member since May 2006 · 30 posts
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Subject: Digest MD5 failing
Hi Alex,

Been away for a while but when I tried to continue working I get rejected from the amessage.info server as shown by the message flow below.  If I force the SaslHandler to send a RequestLoginInfo rather than init one of the sasl.mechanisms the login works fine.

Thanks in advance,

Simon

SEND: <stream:stream to='amessage.info' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' version='1.0' xml:lang='en'>
RECV: <stream:stream xmlns:stream="http://etherx.jabber.org/streams" from="amessage.info" version="1.0" id="1938990772" >
RECV: <stream:features xmlns:stream="http://etherx.jabber.org/streams"><register xmlns="http://jabber.org/features/iq-register" /><auth xmlns="http://jabber.org/features/iq-auth" /><mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl"><mechanism>NTLM</mechanism><mechanism>LOGIN</mechanism><mechanism>PLAIN</mechanism><mechanism>DIGEST-MD5</mechanism><mechanism>CRAM-MD5</mechanism></mechanisms></stream:features>
SEND: <auth xmlns="urn:ietf:params:xml:ns:xmpp-sasl" mechanism="DIGEST-MD5" />
RECV: <challenge xmlns="urn:ietf:params:xml:ns:xmpp-sasl">bm9uY2U9IjVoSnE4K3hITC8rNlhxRUpOWERUeHJrOXpEMnNvckVWc2RwYXd4NklrSmM9IixyZWFsbT0iYW1lc3NhZ2UuaW5mbyIscW9wPSJhdXRoLGF1dGgtaW50LGF1dGgtY29uZiIsY2lwaGVyPSJyYzQtNDAscmM0LTU2LHJjNCxkZXMsM2RlcyIsbWF4YnVmPTEwMjQsY2hhcnNldD11dGYtOCxhbGdvcml0aG09bWQ1LXNlc3M=</challenge>
SEND: <response xmlns="urn:ietf:params:xml:ns:xmpp-sasl">dXNlcm5hbWU9InNpbW9uaGFtZWxlY2giLHJlYWxtPSJhbWVzc2FnZS5pbmZvIixub25jZT0iNWhKcTgreEhMLys2WHFFSk5YRFR4cms5ekQyc29yRVZzZHBhd3g2SWtKIixjbm9uY2U9IjE3NzU5YzNlMmFmNGE4YTA0NGNjMTk4YmZiNGM4M2RhNmIxMzYzZDExNzA0NjZlNzIwZDU0MjVmMmE4MTgzMTEiLG5jPTAwMDAwMDAxLHFvcD1hdXQsZGlnZXN0LXVyaT0ieG1wcC9hbWVzc2FnZS5pbmZvIixjaGFyc2V0PXV0Zi04LHJlc3BvbnNlPTM0M2E4MWVjMWJmMTFkNjRiNGJiOWRmYWM4MmZlZjc2</response>
RECV: <failure xmlns="urn:ietf:params:xml:ns:xmpp-sasl"><not-authorized /></failure>
RECV: </stream:stream>
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Alex 2006-07-16, 15:08 #2
Member since Feb 2003 · 4449 posts · Location: Germany
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Hello simons,

we can reproduce this problems. It looks like amessage and jabberd1.4 updated/changed the SASL codes and/or libraries.
agsXMPP is crashing when parsing the Digest-md5 challenge. We try to fix this problem as soon as possible and upload the new code to SVN then. For now you can choose the SASL mechanism manual and set it to SASL-Plain which should work with the amessage servers.

Alex
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simons 2006-07-16, 18:46 #3
User title: Simon shaw
Member since May 2006 · 30 posts
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In my tests the Sasl-PLAIN failed as well
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Alex 2006-07-16, 22:13 #4
Member since Feb 2003 · 4449 posts · Location: Germany
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Hi Simon,

SASL PLAIN works fine for me. Here is the code to specify the mechanism manual in the OnSaslStart Event of XmppClientConnection.

  1. void XmppCon_OnSaslStart(object sender, SaslEventArgs args)
  2. {
  3.     // You can define the SASL mechanism here when needed
  4.     args.Auto = false;
  5.     args.Mechanism = agsXMPP.protocol.sasl.Mechanism.GetMechanismName(agsXMPP.protocol.sasl.MechanismType.DIGEST_MD5);
  6. }

we also improved the DIGEST-MD5 stuff to work again with the amessage servers. I will release this code soon. But first i wanna make some more testing before and also talk to mawis the admin of the amessage servers and maintainer of the jabberd 1 server code about his changes. He is doing the DIGEST-MD5 auth different than all the other server programmers.

Alex
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Alex 2006-07-16, 23:18 #5
Member since Feb 2003 · 4449 posts · Location: Germany
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Hi Simon,

the fixed DIGEST-MD5 SASL classes are attached.
I hope this works for you too.

Alex
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simons 2006-07-17, 20:21 #6
User title: Simon shaw
Member since May 2006 · 30 posts
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Hi Alex,

Thanks, it works.

Simon
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Alex 2006-07-17, 20:22 #7
Member since Feb 2003 · 4449 posts · Location: Germany
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code is also in SVN now.

Alex
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