I have been trying for almost a month to intercept the traffic of an android app the uses SSL pinning. I used Android-SSL-TrustKiller and SSLUnpinning but it did not work.I also decompiled the app and added mitmproxy's certificate to the app's truststore but still no luck.After some investigation I found that the app is using SPDY protocol.I thought that this might be the source of the problem so I searched google about how this protocol perform SSL certificate validation but I could not find anything.
So does SPDY protocol uses a different mechanism for SSL pinning? if not then what is preventing the app from trusting the proxy after I have added the proxy's certificate to the app's truststore?