[Serusers] LDAP with SIP digest HTTP authentication

Sun Feb 22 02:20:04 CET 2004

> > I'm trying to develop a solution for LDAP authentication in SER, 
> but i have
> > a question.  With digest HTTP authentication (RFC 2617) the SIP 
> server> doesn't have the plain password, it has a hash of 
> user:realm:password> (H(A1)).   How could a sip server authenticate 
> the users using a standard
> How do you came to this conclusion? E.g. by default SER stores the 
> plain text 
> password and H(A1) in its database.

I wanted to say that UA don't send plain password, only a password digest.
> > LDAP database with this information?
> >
> > Somebody knows a solution for this?
> >
> > My ideas are to use HTTP basic authentication (not standard with 
> SIP) or
> Basic authentication is absolutely insecure! And basic 
> authentication is not 
> allowed according to RFC3261. You will (hopefully) not find any SIP 
> UA which 
> supports basic authentication.
I think so, too.
> > store H(A1) in LDAP (not standard in LDAP, you need to modify the 
> stored> information). I think both are bad solutions.
> Store the plain text password or H(A1) in LDAP, whatever you 
> prefer. It is 
> easy to generate H(A1) from a given plain text password.
But, i want to authenticate with an external LDAP, and usually (my case too) you can't obtain plain passwords and you can't store new information (H(A1)) for the SIP service.


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