<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>8 jan 2014 kl. 01:24 skrev Dylan Herman <<a href="mailto:hermandy@pascack.k12.nj.us">hermandy@pascack.k12.nj.us</a>>:</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; ">Thank you for responding.<br><br><div>I already have the libsrtp on my system, I believe, since I have the same files that were on the libsrtp github. Are you saying that I could just write my code in one of the scripts with the encryption algorithms leaving it under its original name of the algorithm? Such as aes.c, aes_cbc.c...<br></div></div></blockquote>I think you need to learn more about the standards and how SRTP is negotiated before you do anything. What you need to do is to come up with a name and a tag for negotiation in the SDP offer/answer</div><div>process. If this is successfully negotiated you engage your crypto code. You need to add code, not replace code.</div><div><br></div><div>/O</div><div><blockquote type="cite"><div style="font-family: Helvetica, Arial, sans-serif; font-size: 13px; "><div><br><div><br><br>>>> "Olle E. Johansson" <<a href="mailto:oej@edvina.net">oej@edvina.net</a>> 01/07/14 9:39 AM >>><br><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"><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><br><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><br><div>/O</div><br></div></div>
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<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div>---</div><div>* Olle E Johansson - <a href="mailto:oej@edvina.net">oej@edvina.net</a></div><div>* Cell phone +46 70 593 68 51, Office +46 8 96 40 20, Sweden</div><div><br class="webkit-block-placeholder"></div></span><br class="Apple-interchange-newline">
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