Unexport i2d, d2i, and ASN1_ITEM for X.509 interior types

Many of the extension types are not the extensions themselves, but the
interious types used in various subfields. In preparation for when we
rewrite these parsers with <openssl/bytestring.h>, having fewer of these
means fewer compatibility functions to bridge the calling conventions.

We do still need new/free functions, so that callers can construct
extensions themselves. While I'm here, go ahead and expand the macros
and document.

(Top-level extension types need ASN1_ITEMs for X509V3_METHOD, and
d2i/i2d functions for callers that wish to parse and serialize. But
there's no real need to do this for the individual fields.)

Update-Note: Some interior ASN.1 types no longer have d2i and i2d
functions or ASN1_ITEMs. I checked code search and no one was using any
of these. We can restore them as needed.

Bug: 547
Change-Id: I0b2840bf4aea2212a757ce39b4918c8742043725
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/66389
Reviewed-by: Bob Beck <bbe@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
4 files changed
tree: 206827efe503c074d481ba7c688c93a216bfe7ac
  1. .github/
  2. cmake/
  3. crypto/
  4. decrepit/
  5. fuzz/
  6. include/
  7. pki/
  8. rust/
  9. ssl/
  10. third_party/
  11. tool/
  12. util/
  13. .clang-format
  14. .gitignore
  15. API-CONVENTIONS.md
  16. BREAKING-CHANGES.md
  17. BUILDING.md
  18. CMakeLists.txt
  19. codereview.settings
  20. CONTRIBUTING.md
  21. FUZZING.md
  22. go.mod
  23. go.sum
  24. INCORPORATING.md
  25. LICENSE
  26. PORTING.md
  27. README.md
  28. SANDBOXING.md
  29. sources.cmake
  30. 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.

Project links:

There are other files in this directory which might be helpful: