17b3083373
In TLS 1.2, resumption's benefits are more-or-less subsumed by False Start. TLS 1.2 resumption lifetime is bounded by how much traffic we are willing to encrypt without fresh key material, so the lifetime is short. Renewal uses the same key, so we do not allow it to increase lifetimes. In TLS 1.3, resumption unlocks 0-RTT. We do not implement psk_ke, so resumption incorporates fresh key material into both encrypted traffic (except for early data) and renewed tickets. Thus we are both more willing to and more interested in longer lifetimes for tickets. Renewal is also not useless. Thus in TLS 1.3, lifetime is bound separately by the lifetime of a given secret as a psk_dhe_ke authenticator and the lifetime of the online signature which authenticated the initial handshake. This change maintains two lifetimes on an SSL_SESSION: timeout which is the renewable lifetime of this ticket, and auth_timeout which is the non-renewable cliff. It also separates the TLS 1.2 and TLS 1.3 timeouts. The old session timeout defaults and configuration apply to TLS 1.3, and we define new ones for TLS 1.3. Finally, this makes us honor the NewSessionTicket timeout in TLS 1.3. It's no longer a "hint" in 1.3 and there's probably value in avoiding known-useless 0-RTT offers. BUG=120 Change-Id: Iac46d56e5a6a377d8b88b8fa31f492d534cb1b85 Reviewed-on: https://boringssl-review.googlesource.com/13503 Reviewed-by: Adam Langley <agl@google.com> |
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| .github | ||
| crypto | ||
| decrepit | ||
| fuzz | ||
| include/openssl | ||
| infra/config | ||
| ssl | ||
| third_party | ||
| tool | ||
| util | ||
| .clang-format | ||
| .gitignore | ||
| API-CONVENTIONS.md | ||
| BUILDING.md | ||
| CMakeLists.txt | ||
| codereview.settings | ||
| CONTRIBUTING.md | ||
| FUZZING.md | ||
| INCORPORATING.md | ||
| LICENSE | ||
| PORTING.md | ||
| README.md | ||
| STYLE.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:
- 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.