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5 Replies Last post: Dec 18, 2009 10:53 AM by ijaz  
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ijaz
16 posts since
Dec 3, 2009

Dec 3, 2009 4:22 PM

One Way Voice while using encryption!

Hi,
I am getting one way voice with encrypted connection,i am using diffshif encryption. i get voice from called party but my voice is not going on other side.
without encryption it works fine.

please help me.

Thanks
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joegen
519 posts since
Apr 28, 2007
1. Dec 8, 2009 2:57 AM in response to: ijaz
Re: One Way Voice while using encryption!
use XOR. Diffshift only encrypts SIP signaling. Of course you would also need the client to support XOR or diffshift for it to work. What client are you using to achive diff-shift if I may ask?
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ijaz
16 posts since
Dec 3, 2009
2. Dec 14, 2009 3:35 PM in response to: joegen
Re: One Way Voice while using encryption!
Hi
Thank you for reply. I am using OSSPhone.
Can you help me again? how can i detect (in my own client) data is encrypted or not.

Thanks in advance.

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ijaz
16 posts since
Dec 3, 2009
3. Dec 14, 2009 3:38 PM in response to: joegen
Re: One Way Voice while using encryption!
Hi
Thank you for reply. I am using OSSPhone.
Can you help me again? how can i detect (in my own client) data is encrypted or not.
in other word how OpenSBC server detect that the data is encrypted or not.

(my be stupid question)

Thanks in advance.
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joegen
519 posts since
Apr 28, 2007
4. Dec 17, 2009 8:31 PM in response to: ijaz
Re: One Way Voice while using encryption!

Always use XOR if you are using OSSPhone. That's the encryption method that is fully tested. OpenSBC detect encrypted SIP and RTP packets automatically. How? Simple, if it doesnt look like a SIP packet, then decrypt it. if its still not a SIP packet after decryption, the drop it. Same goes with RTP. If you wan't to know if opensbc detects encruption simply look for enc=1 in the incoming packet log. 1 means encrypted, 0 means not.
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ijaz
16 posts since
Dec 3, 2009
5. Dec 18, 2009 10:53 AM in response to: joegen
Re: One Way Voice while using encryption!
Thank you very much joegen,

I will try to use XOR if i get problem i will contect you .

Thank you again.

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