[Freeswitch-users] symbian s60 SIP over TLS

R. Eric Bennett reb-freeswitch at futurexp.com
Fri Sep 12 11:01:50 EDT 2008


folks,

i'm wondering if anyone here has actually managed to get SIP over TLS  
working from a symbian s60 phone to FreeSWITCH.  i've been trying for  
some time with an e71 and while i've made some progress, progress !=  
success.

in fact, i've progressed to the point where the failure is known to  
not be specific to FreeSWITCH's implementation.  however, having used  
the certificates generated by FreeSWITCH's gentls_cert script with  
openssh s_server's builtin simple web server while having my e71's  
browser connect to it, i can say that the failure mode is same (we  
send cert, e71 replies with "illegal parameter") whether we are  
running SIP or HTTP over SSL/TLS.  as such, it could still be a result  
of the certs generated by the FS scripts.

to eliminate one obvious potential cause, note that i have installed  
the FreeSWITCH CA cert on the e71 so it shouldn't be a self-signed  
cert problem.  this leaves me thinking that the problem is either an  
openssl problem (there appear to have been some interoperability  
issues between SSL implementations as a result of e.g. padding SSL  
PDUs) or a limitation in the feature set of the symbian s60 TLS  
implementation, specifically limitations on the types of server certs  
it'll accept.  before exhausting more energy trying to track this  
down, i was hoping that someone out there may have solved this problem  
or at least know exactly what the problem is i can stop banging my  
head against the wall.

anyone?  anyone?  Bueller?

thanks,
eric




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