Clone this repo:
  1. c5eb467 Remove dead code in p256-x86_64. by Brian Smith · 9 days ago master
  2. 758d127 Add get0 getters for EVP_PKEY. by David Benjamin · 9 days ago
  3. fde89b4 avoid clashes with libc's 'open' in e_chacha20poly1305.c by Mostyn Bramley-Moore · 10 days ago
  4. 60a45aa Remove reference to removed |RSA_FLAG_NO_CONSTTIME| flag. by Brian Smith · 11 days ago
  5. 81edc9b Do away with BN_LLONG in favor of BN_ULLONG. by David Benjamin · 11 days ago


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:

  • how to port OpenSSL-using code to BoringSSL.
  • how to build BoringSSL
  • rules and guidelines for coding style.
  • include/openssl: public headers with API documentation in comments. Also available online.
  • information about fuzzing BoringSSL.