Fix time offset calculation.

ASN1_GENERALIZEDTIME and ASN1_UTCTIME may be specified using offsets,
even though that's not supported within certificates. [davidben: This
commit message seems off as crypto/x509 does not reject them. It merely
has a comment telling you that it's doing it wrong.]

To convert the offset time back to GMT, the offsets are supposed to be
subtracted, not added. e.g. 1759-0500 == 2359+0100 == 2259Z.

(Imported from upstream's d2335f30970ed3edc1c7c11700ab7f34396cf086.)

Change-Id: Id0d4c5b650e77db3b04b15e66b069807f6f31266
Commit-Queue: David Benjamin <>
Commit-Queue: Steven Valdez <>
Reviewed-by: Steven Valdez <>
CQ-Verified: CQ bot account: <>
2 files changed
tree: 8a734731768e53a1efe15e429e4066bc5f8f4520
  1. .github/
  2. crypto/
  3. decrepit/
  4. fipsoracle/
  5. fuzz/
  6. include/
  7. infra/
  8. ssl/
  9. third_party/
  10. tool/
  11. util/
  12. .clang-format
  13. .gitignore
  16. CMakeLists.txt
  17. codereview.settings


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: