Hi, We are working on PJSIP 1.5 version on Windows mobile. We are trying to implement encryption in PJSIP code WITHOUT enabling SRTP. The following link gave us some insight on implementing the same. http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/2009-April/006979.html As per suggestion in above post we tried to implement our encryption logic in put_frame_imp() method after Encoding & before RTP encapsulation and only for the following condition, if (frame->type != PJMEDIA_FRAME_TYPE_NONE && frame->buf != NULL) // I suppose this condition is to make sure the frame is *normal* Similarly The decryption logic is been implemented in function get_frame() in stream.c when it receives the *normal* frame and before stream->codec->op->decode(..) method is called. But Still we are not getting the desired result. The voice at both the ends is noisy and both the parties can only hear noise and nothing else. The encryption/decryption logic works correctly for strings so there should not be any issue with it. Can anyone please throw some light on it as where are going wrong and what we need to do? Is the place for encryption or decryption is correct? Thanks, Sangram

Hi, Have you tried to decrypt the RTP payload in on_rx_rtp() before codec->parse()? BR, nanang On Thu, Jan 28, 2010 at 11:47 PM, sangram desai <desaisang@gmail.com> wrote: > > Hi, > We are working on PJSIP 1.5 version on Windows mobile. > We are trying to implement encryption in PJSIP code WITHOUT enabling SRTP. The following link gave us some insight on implementing the same. > http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/2009-April/006979.html > As per suggestion in above post we tried to implement our encryption logic in put_frame_imp() method after Encoding & before RTP encapsulation and only for the following condition, > if (frame->type != PJMEDIA_FRAME_TYPE_NONE && frame->buf != NULL) // I suppose this condition is to make sure the frame is *normal* > > Similarly The decryption logic is been implemented in function get_frame() in stream.c when it receives the *normal* frame and before stream->codec->op->decode(..) method is called. > But Still we are not getting the desired result. The voice at both the ends is noisy and both the parties can only hear noise and nothing else. > The encryption/decryption logic  works correctly for strings so there should not be any issue with it. > > Can anyone please throw some light on it as where are going wrong and what we need to do? Is the place for encryption or decryption is correct? > > Thanks, > Sangram > > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip@lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >