This branch allows to select the cipher suite used by TLS by setting the CIPHER_SUITE environment variable.
If the environment variable is unset, the cipher suite will be selected as usual.
It also implements a new TLS cipher suite TLS_NOOP_SHA256, which uses an AEAD algorithm where plaintext equals ciphertext and which outputs a constant authentication tag (0x2a2a2a...).
Possible values for the CIPHER_SUITE environment variable:
| Cipher Suite Name | Value for CIPHER_SUITE |
|---|---|
TLS_AES_128_GCM_SHA256 |
0x03001301 |
TLS_AES_256_GCM_SHA384 |
0x03001302 |
TLS_CHACHA20_POLY1305_SHA256 |
0x03001303 |
TLS_NOOP_SHA256 |
0x03004242 |
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:
- PORTING.md: how to port OpenSSL-using code to BoringSSL.
- BUILDING.md: how to build BoringSSL
- INCORPORATING.md: how to incorporate BoringSSL into a project.
- API-CONVENTIONS.md: general API conventions for BoringSSL consumers and developers.
- STYLE.md: rules and guidelines for coding style.
- include/openssl: public headers with API documentation in comments. Also available online.
- FUZZING.md: information about fuzzing BoringSSL.
- CONTRIBUTING.md: how to contribute to BoringSSL.
- BREAKING-CHANGES.md: notes on potentially-breaking changes.
- SANDBOXING.md: notes on using BoringSSL in a sandboxed environment.