ec/asm/p256-x86_64-asm.pl: get corner case logic right.

(Imported from upstream's 64333004a41a9f4aa587b8e5401420fb70d00687.)

RT#4284.

This case should be impossible to hit because |EC_POINT_add| doesn't use
this function and trying to add equal inputs should never occur during a
multiplication. Support for this exists because the pattern has been
copied from the first 64-bit P-224 and P-256 work that Emilia, Bodo and
I did. There it seemed like a reasonable defense-in-depth in case the
code changed in the future.

Change-Id: I7ff138669c5468b7d7a5153429bec728cb67e338
Reviewed-on: https://boringssl-review.googlesource.com/7246
Reviewed-by: David Benjamin <davidben@google.com>
1 file changed
tree: c53373c9383571ae7ea16459e75be059f2753751
  1. .clang-format
  2. .gitignore
  3. BUILDING.md
  4. CMakeLists.txt
  5. CONTRIBUTING.md
  6. FUZZING.md
  7. LICENSE
  8. PORTING.md
  9. README.md
  10. STYLE.md
  11. codereview.settings
  12. crypto/
  13. decrepit/
  14. fuzz/
  15. include/
  16. ssl/
  17. tool/
  18. util/
README.md

BoringSSL

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: