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David Benjamin 5e7e7cc696 Add SSL_set_fallback_version. 
Alas, we will need a version fallback for TLS 1.3 again.

This deprecates SSL_MODE_SEND_FALLBACK_SCSV. Rather than supplying a
boolean, have BoringSSL be aware of the real maximum version so we can
change the TLS 1.3 anti-downgrade logic to kick in, even when
max_version is set to 1.2.

The fallback version replaces the maximum version when it is set for
almost all purposes, except for downgrade protection purposes.

BUG=chromium:630165

Change-Id: I4c841dcbc6e55a282b223dfe169ac89c83c8a01f
Reviewed-on: https://boringssl-review.googlesource.com/8882
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
2016-07-22 14:47:47 +00:00
.github Add a PULL_REQUEST_TEMPLATE. 2016-03-08 15:23:52 +00:00
crypto Add mod_mul tests where M ≪ A and B. 2016-07-22 14:47:24 +00:00
decrepit Make OBJ_NAME_do_all more OpenSSL-compatible. 2016-06-27 21:42:27 +00:00
fuzz Replace base64 decoding. 2016-05-26 17:59:10 +00:00
include/openssl Add SSL_set_fallback_version. 2016-07-22 14:47:47 +00:00
infra/config Infrastructure: Temporarily switch Android builders to experimental. 2016-07-19 16:59:06 +00:00
ssl Add SSL_set_fallback_version. 2016-07-22 14:47:47 +00:00
third_party/android-cmake Check in a copy of android-cmake. 2016-05-19 16:55:25 +00:00
tool Teach bssl server about -max-version and -min-version. 2016-07-17 08:18:58 +00:00
util Migrate from Android.mk to Android.bp 2016-07-21 20:28:16 +00:00
.clang-format Import `newhope' (post-quantum key exchange). 2016-04-26 22:53:59 +00:00
.gitignore Fix documentation generation on Windows. 2015-08-19 00:45:42 +00:00
BUILDING.md Document compiler and assembler requirements. 2016-06-10 17:17:09 +00:00
CMakeLists.txt Add top-level BUILD file (in util/). 2016-07-06 23:03:01 +00:00
codereview.settings No-op change to trigger the new Bazel bot. 2016-07-07 12:07:04 -07:00
CONTRIBUTING.md Add a CONTRIBUTING.md file. 2016-02-10 21:38:19 +00:00
FUZZING.md Replace base64 decoding. 2016-05-26 17:59:10 +00:00
INCORPORATING.md Remove backslash. 2016-07-07 21:39:44 +00:00
LICENSE Add some bug references to the LICENSE file. 2016-02-22 20:16:48 +00:00
PORTING.md Add a table for porting SSL_CTX_ctrl code. 2016-07-15 22:41:06 +00:00
README.md Add document about incorporating BoringSSL into a project. 2016-04-27 18:04:37 +00:00
STYLE.md Breaking news: 1998 has come and gone. 2016-07-11 23:51:47 +00:00

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: