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David Benjamin 602f4669ab Forbid empty CertificateRequestsupported_signature_algorithms in TLS 1.2.
See the IETF thread here:
https://www.ietf.org/mail-archive/web/tls/current/msg27292.html

In particular, although the original publication of RFC 5246 had a
syntax error in the field (the minimum length was unspecified), there is
an errata from 2012 to fix it to be non-empty.
https://www.rfc-editor.org/errata/eid2864

Currently, when empty, we implicitly interpret it as SHA1/*, matching
the server behavior in missing extension in ClientHellos. However that
text does not support doing it for CertificateRequests, and there is not
much reason to. That default (which is in itself confusing and caused
problems such as older OpenSSL only signing SHA-1 given SNI) was
because, at the time, there were concerns over making any ClientHello
extensions mandatory. This isn't applicable for CertificateRequest,
which can freely advertise their true preferences.

Change-Id: I113494d8f66769fde1362795fb08ff2f471ef31d
Reviewed-on: https://boringssl-review.googlesource.com/c/33524
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
2018-12-11 20:08:12 +00:00
.github Add a PULL_REQUEST_TEMPLATE. 2016-03-08 15:23:52 +00:00
crypto Eliminate |OPENSSL_ia32cap_P| in C code in the FIPS module. 2018-12-06 00:58:14 +00:00
decrepit Undo recent changes to |X509V3_EXT_conf_nid|. 2018-10-17 21:05:45 +00:00
fipstools Support symbol prefixes 2018-09-06 20:07:52 +00:00
fuzz Refresh fuzzer corpora for changes to split-handshake serialization. 2018-11-06 01:19:38 +00:00
include/openssl Fix d2i_*_bio on partial reads. 2018-12-05 22:05:28 +00:00
infra/config No longer set CQ-Verified label on CQ success/failure. 2018-11-19 16:59:05 +00:00
ssl Forbid empty CertificateRequestsupported_signature_algorithms in TLS 1.2. 2018-12-11 20:08:12 +00:00
third_party Modernize OPENSSL_COMPILE_ASSERT, part 2. 2018-11-14 16:06:37 +00:00
tool Work around a JDK 11 TLS 1.3 bug. 2018-11-21 18:22:57 +00:00
util Make symbol-prefixing work on 32-bit x86. 2018-11-27 22:35:17 +00:00
.clang-format Import `newhope' (post-quantum key exchange). 2016-04-26 22:53:59 +00:00
.gitignore Update tools. 2018-09-13 17:57:30 +00:00
API-CONVENTIONS.md Clarify "reference" and fix typo. 2018-09-05 19:06:48 +00:00
BREAKING-CHANGES.md Add some notes on how to handle breaking changes. 2018-04-28 00:04:41 +00:00
BUILDING.md Switch docs to recommending NASM. 2018-11-14 16:00:42 +00:00
CMakeLists.txt Make Windows symbol-prefixing work. 2018-11-27 22:13:22 +00:00
codereview.settings Comment change in codereview.settings 2018-07-26 00:23:04 +00:00
CONTRIBUTING.md Add a CONTRIBUTING.md file. 2016-02-10 21:38:19 +00:00
FUZZING.md Switch to Clang 6.0's fuzzer support. 2018-08-27 17:18:56 +00:00
go.mod Set up Go modules. 2018-09-17 21:04:17 +00:00
INCORPORATING.md Update URL for GN quick start guide. 2018-08-16 20:18:41 +00:00
LICENSE Note licenses for support code in the top-level LICENSE file. 2018-03-27 17:03:47 +00:00
PORTING.md Remove reference to SSL3 in PORTING.md. 2018-06-29 17:46:32 +00:00
README.md Add some notes on how to handle breaking changes. 2018-04-28 00:04:41 +00:00
sources.cmake Add new curve/hash ECDSA combinations from Wycheproof. 2018-08-10 18:26:06 +00:00
STYLE.md Fix some style guide samples. 2017-08-31 14:24:45 +00:00

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: