SRTP with MiniSIP in combination with OpenSER

[Thorsten.Haupt at t-systems.com]

Hey,

I'm using MiniSIP in combination with OpenSER. The connection via TLS (server and client certificates) works fine. But the encryption of the media stream doesn't work. Using pre-shared keys, the windows and linux version crashes. Using DH I get following error message.

Caller:
The remote user could not handle the call.
"Incoming key management message could not be authorized" 


Callee:
RtpReceiver:: final trying port = 30044
Got a call from Id user@ <https://email.t-online.de/index.php?ctl=write_email&p%5BTO%5D=06%40cosmo-vcs.ipcc.berkom.de> server
SipIdentity::setSipUri: sipUsername=<06>
sipDomain=<xxx>
Authentication successful, controling the certificate
0
certificate signature failure
Certificate check failed in the incoming MIKEY message
No MIME match 

I use the certificates, created with the scripts in OpenSER with the standart size of 1024 bit, I tried also 512 bit certs. All certificates were signed by the same RootCA.
Has anyone the same problem or a solution?

Thanks.
Torsten
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