[Asterisk-Dev] IAX Spec online

Tim Robbins tim at teragen.com.au
Wed Apr 27 17:07:03 MST 2005


Great work so far. A few points (based on a quick reading):

* The procedure for computing response to MD5 and RSA challenges is not
specified. The MD5 response is the ASCII hexadecimal representation of the
MD5 digest (RFC 1321) of the challenge concatenated with the shared secret.
The RSA result is the Base-64 encoding (RFC 3548) of the PKCS #1 2.0 RSA
signature of the SHA1 digest of the challenge.

* Encryption is not adequately specified.

* The format of the CODEC PREFS IE is not adequately specified. The best
(only?) description I can find is
http://bugs.digium.com/bug_view_page.php?bug_id=0002971 .


Tim

> -----Original Message-----
> From: asterisk-dev-bounces at lists.digium.com 
> [mailto:asterisk-dev-bounces at lists.digium.com] On Behalf Of 
> Kenny Shumard
> Sent: Wednesday, 27 April 2005 1:53 PM
> To: Asterisk Developers Mailing List
> Subject: [Asterisk-Dev] IAX Spec online
> 
> I've finished a working version of the IAX specification and 
> posted it online at
> 
> http://splurge.peoples-wireless.com/iax/iax.txt
> 
> I'm very willing to listen to constructive criticism 
> regarding additions or alterations to the spec as presented. 
> The more people that read and comment on this, the sooner we 
> can (hopefully) get it into the official standards track.
> 
> I know there are some parts that aren't completely correct, 
> so please help me out by pointing them out -- gently. : )




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