On Fri, 7 Oct 2022 15:37:24 GMT, Daniel Jeliński <djelin...@openjdk.org> wrote:
>>> It seems to me the scalar multiplication enhancement should be done first, >>> or maybe integrated with this fix. Do you have a bug number for the scalar >>> multiplication enhancement? >> >> I did not file the scalar multiplication enhancement in JBS yet. There are >> a few places that could be improved for the EC performance. However, the >> update is big if having them all in one PR. In order to simplify the code >> review and implementation, I would like to break it down into small >> enhancements. I filed an [umbrella >> RFE](https://bugs.openjdk.org/browse/JDK-8294188) for the performance >> improvement in EC. The goal to make the common EC crypto operations (key >> generation/exchange/signature) 3+ times faster, and make the TLS connections >> 20%+ faster . >> >> I may have to wait for a few more weeks so that I can come up with the >> scalar multiplication pull request. > > @XueleiFan tests are failing after the last commit; see > `sun/security/ec/TestEC.java` for example. > > @ferakocz biginteger math is not constant-time, which is why it can't be used > here. @djelinski for this purpose, it doesn't matter if the exponentiation is not constant time, as its running time only depends on the value of the exponent, which is a known (public) value. ------------- PR: https://git.openjdk.org/jdk/pull/10544
