Clarify lifecycle of |BN_BLINDING|.

In |bn_blinding_update| the condition |b->e != NULL| would never be
true (probably), but the test made reasoning about the correctness of
the code confusing. That confusion was amplified by the circuitous and
unusual way in which |BN_BLINDING|s are constructed. Clarify all this
by simplifying the construction of |BN_BLINDING|s, making it more like
the construction of other structures.

Also, make counter unsigned as it is no longer ever negative.

Change-Id: I6161dcfeae19a80c780ccc6762314079fca1088b
Reviewed-on: https://boringssl-review.googlesource.com/7530
Reviewed-by: David Benjamin <davidben@google.com>
3 files changed
tree: 02f7ad9ee5e2d27d005b3a5ab8438ce2323728c7
  1. .github/
  2. crypto/
  3. decrepit/
  4. fuzz/
  5. include/
  6. ssl/
  7. tool/
  8. util/
  9. .clang-format
  10. .gitignore
  11. BUILDING.md
  12. CMakeLists.txt
  13. codereview.settings
  14. CONTRIBUTING.md
  15. FUZZING.md
  16. LICENSE
  17. PORTING.md
  18. README.md
  19. STYLE.md
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: