Return 0x80 in all ASN1_get_object error paths.

If the header is valid, but the body is truncated, ASN1_get_object
intentionally preserves the indefinite-length and constructed output
bits. This means callers who check for error with == 0x80 may read off
the end of the buffer on accident.

This is unlikely to break callers: 0x80 was already a possible error
value, so callers already needed to handle it. The original function's
aim in returning more information is unlikely to matter because callers
cannot distinguish 0x80 (could not parse header) and 0x80 (header was
valid, definite-length, and primitive, but length was too long).

Update-Note: ASN1_get_object's calling convention is slightly

Bug: 451
Change-Id: If2b45c47e6b8864aef9fd5e04f313219639991ed
Reviewed-by: Adam Langley <>
Commit-Queue: David Benjamin <>
3 files changed
tree: 5e40085ece8d44855e4cfa2d3b3b3c9bbb552f3a
  1. .clang-format
  2. .github/
  3. .gitignore
  7. CMakeLists.txt
  16. codereview.settings
  17. crypto/
  18. decrepit/
  19. fuzz/
  20. go.mod
  21. go.sum
  22. include/
  23. sources.cmake
  24. ssl/
  25. third_party/
  26. tool/
  27. util/


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: