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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>A long fixed salt doesn’t help over the simple “:” in any
practical way. The salt <b>must</b> be unique for each user for decent security.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Adam<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> opensim-dev-bounces@lists.berlios.de
[mailto:opensim-dev-bounces@lists.berlios.de] <b>On Behalf Of </b>Impalah
Shenzhou<br>
<b>Sent:</b> Friday, 16 October 2009 3:44 AM<br>
<b>To:</b> opensim-dev@lists.berlios.de<br>
<b>Subject:</b> Re: [Opensim-dev] open sim UUID and Passwordhash<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>This comes from
UserManagerBase.AddUser (0.6.6):<br>
<br>
string md5PasswdHash = Util.Md5Hash(Util.Md5Hash(password) + ":" +
String.Empty);<br>
<br>
The salt should be where String.Empty is.<br>
<br>
I think it doesn't change in the most recent versions, so the "create
user" method of the console (both standalone and ugaim) are unsecure by
default.<br>
<br>
<br>
Anyway, I agree with Melanie and Adam that the salt is needed for improving
security, if not a random salt every time you create an user, at least a long
and secret unique salt.<br>
<br>
Greetings<br>
<br>
<br>
<o:p></o:p></p>
<div>
<p class=MsoNormal>2009/10/16 Frisby, Adam <<a
href="mailto:adam@deepthink.com.au">adam@deepthink.com.au</a>><o:p></o:p></p>
<p class=MsoNormal>+1 to Melanie, that code is *not* secure. It is salted with
a ":" but that's a fixed known salt.<br>
<br>
This is what I suggest:<br>
<br>
$passwordSalt = md5(time() . utime() . mt_rand(0,mt_getrandmax())); // or any
other good random source<br>
$passwordHash = md5(md5($password) . ':' . $passwordSalt);<br>
<br>
$passwordSalt should be unique among your database (very likely with the above
code); if there are duplicates, then it allows dictionary attacks to be done,
the more duplicates, the more effective it is.<br>
<span style='color:#888888'><br>
Adam</span><o:p></o:p></p>
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<p class=MsoNormal><br>
> -----Original Message-----<br>
> From: <a href="mailto:opensim-dev-bounces@lists.berlios.de">opensim-dev-bounces@lists.berlios.de</a>
[mailto:<a href="mailto:opensim-dev-">opensim-dev-</a><br>
> <a href="mailto:bounces@lists.berlios.de">bounces@lists.berlios.de</a>] On
Behalf Of Melanie<br>
> Sent: Thursday, 15 October 2009 4:14 PM<br>
> To: <a href="mailto:opensim-dev@lists.berlios.de">opensim-dev@lists.berlios.de</a><br>
> Subject: Re: [Opensim-dev] open sim UUID and Passwordhash<br>
><br>
> Please don't use that code. It creates unsalted hashes, which are<br>
> not secure.<br>
> The "" should be a ranndom salt, stored in the passwordSalt
field in<br>
> the DB. If that is blank, you're running a very insecure system<br>
><br>
><br>
> Melanie<br>
><br>
><br>
> Rich White wrote:<br>
> > here is the PHP code - $password_hash = md5(md5($password) .
":"<br>
> ."");<br>
> ><br>
> > an md5 hash of an md5 hash<br>
> ><br>
> > =====<br>
> ><br>
> > 2009/10/15 Márcio Cardoso <<a href="mailto:marciomaiden@gmail.com">marciomaiden@gmail.com</a>>:<br>
> >> Good night,<br>
> >><br>
> >> will be possible that someone could help me with 2 problems I
have?<br>
> I'm<br>
> >> trying to create a stored procedure in mysql to add users, but do<br>
> not know<br>
> >> how UUID is generated. anyone have any idea how this
happens?<br>
> Another<br>
> >> problem is how is the encoding of the password.<br>
> >><br>
> >> The ideal was to have access to the code that opensim uses
to add<br>
> avatars.<br>
> >> but I got tired of looking and nothing. I thank you for your
help.<br>
> >><br>
> >> Greetings,<br>
> >><br>
> >> Márcio Cardoso<br>
> >><br>
> >> _______________________________________________<br>
> >> Opensim-dev mailing list<br>
> >> <a href="mailto:Opensim-dev@lists.berlios.de">Opensim-dev@lists.berlios.de</a><br>
> >> <a href="https://lists.berlios.de/mailman/listinfo/opensim-dev"
target="_blank">https://lists.berlios.de/mailman/listinfo/opensim-dev</a><br>
> >><br>
> >><br>
> > _______________________________________________<br>
> > Opensim-dev mailing list<br>
> > <a href="mailto:Opensim-dev@lists.berlios.de">Opensim-dev@lists.berlios.de</a><br>
> > <a href="https://lists.berlios.de/mailman/listinfo/opensim-dev"
target="_blank">https://lists.berlios.de/mailman/listinfo/opensim-dev</a><br>
><br>
> _______________________________________________<br>
> Opensim-dev mailing list<br>
> <a href="mailto:Opensim-dev@lists.berlios.de">Opensim-dev@lists.berlios.de</a><br>
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target="_blank">https://lists.berlios.de/mailman/listinfo/opensim-dev</a><br>
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