On Thu, May 5, 2016 at 5:41 AM, Yoav Nir <ynir.i...@gmail.com> wrote: > Hi Roni. > > I think I can explain one of your questions. > > >> On 8 Apr 2016, at 5:36 PM, Roni Even <ron.even....@gmail.com> wrote: > > <snip /> > >>> Also note, the registry rules are: >>> >>> 0-191 Standards Action Refers to value of >>> first byte >>> 192-254 Specification Required Refers to value of first byte >>> 255 Reserved for Private Use Refers to value of first byte >> [Roni Even] So I would like to assume that there was a reason to have two >> different policies so why not follow it. > > <snip /> > > >>> From RFC4346 a.5 "Cipher suite values with first byte decimal 192 (0xC0) >>> through >> decimal 254 (0xFE) inclusive are reserved for assignment for >> non-Standards Track methods." >> >> So this is the reason to have the registration as non standard document. I >> looked at Camellia and it follows your explanation except for updating the >> TLS specification yet it uses the first byte from the range 0-191. So my >> question will be why did you use the first byte from 192 - range? > > The WG specifically requested these values. Google was eager to have this > algorithms in Chrome, so they chose some values at (almost) random that were > not being used by anyone else.
The first cipher suite values we (I remember it was Adam Langley) chose for our experiments were actually mnemonics: 0xCC13 and 0xCC14, where "CC" suggests ChaCha and "13" suggests Poly1305. You can see these values in the sslproto.h file in the first NSS patch: https://codereview.chromium.org/23619044/diff/31001/net/third_party/nss/ssl/sslproto.h The definitions of those two cipher suites have since changed, so we had to change their cipher suite values. But I asked the co-author Nikos to keep the first byte as 0xCC. I don't know how Nikos chose the range of the values of the second byte (starting with 0xA0, now 0xA8 - 0xAE). Wan-Teh Chang _______________________________________________ Gen-art mailing list Gen-art@ietf.org https://www.ietf.org/mailman/listinfo/gen-art
