|author||Adam Langley <firstname.lastname@example.org>||Mon Oct 30 15:19:08 2017 -0700|
|committer||CQ bot account: email@example.com <firstname.lastname@example.org>||Tue Oct 31 20:58:29 2017 +0000|
Clear bottom three bits of password scalar in SPAKE2. Due to a copy-paste error, the call to |left_shift_3| is missing after reducing the password scalar in SPAKE2. This means that three bits of the password leak in Alice's message. (Two in Bob's message as the point N happens to have order 4l, not 8l.) The “correct” fix is to put in the missing call to |left_shift_3|, but that would be a breaking change. In order to fix this in a unilateral way, we add points of small order to the masking point to bring it into prime-order subgroup. BUG=chromium:778101 Change-Id: I440931a3df7f009b324d2a3e3af2d893a101804f Reviewed-on: https://boringssl-review.googlesource.com/22445 Reviewed-by: Adam Langley <email@example.com> Reviewed-by: David Benjamin <firstname.lastname@example.org> Commit-Queue: Adam Langley <email@example.com> CQ-Verified: CQ bot account: firstname.lastname@example.org <email@example.com>
BoringSSL is a fork of OpenSSL that is designed to meet Google's needs.
Although BoringSSL is an open source project, it is not intended for general use, as OpenSSL is. We don't recommend that third parties depend upon it. Doing so is likely to be frustrating because there are no guarantees of API or ABI stability.
Programs ship their own copies of BoringSSL when they use it and we update everything as needed when deciding to make API changes. This allows us to mostly avoid compromises in the name of compatibility. It works for us, but it may not work for you.
BoringSSL arose because Google used OpenSSL for many years in various ways and, over time, built up a large number of patches that were maintained while tracking upstream OpenSSL. As Google's product portfolio became more complex, more copies of OpenSSL sprung up and the effort involved in maintaining all these patches in multiple places was growing steadily.
Currently BoringSSL is the SSL library in Chrome/Chromium, Android (but it's not part of the NDK) and a number of other apps/programs.
There are other files in this directory which might be helpful: