<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><br><div><div>On 07 Jan 2014, at 15:12, Dylan Herman <<a href="mailto:hermandy@pascack.k12.nj.us">hermandy@pascack.k12.nj.us</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="Author" content="Novell GroupWise WebAccess"><div style="font-family: Helvetica, Arial, sans-serif; font-size: 13px; "><div>Hello,</div><br><br><div>I have a question regarding sRTP with Asterisk. I posted this question on the Asterisk wiki and was suggested to post it on the Developer mailing list. I am working on an encryption project. The project consists of using my own encryption method to encrypt SIP phone calls using an Asterisk server-server connection. I was wondering where the algorithm that sRTP uses to encrypt RTP is located, so I can modify the code to utilize my own algorithm. I was told it is not in the Asterisk source code.</div><br></div></blockquote>The names of the algorithms used in Asterisk is hard coded in Asterisk's srtp code. The rest of the implementation is in the libsrtp library hosted on github.</div><div><br></div><div>Recently libsrtp added an option to use OpenSSL encryption, which is better for some government installations as OpenSSL is usually approved. I don't think we use that option in Asterisk.</div><div><br></div><div>/O</div><br></body></html>