7ba996874b
When a crypto/tls client using TLS < 1.3 sends supported elliptic_curves in a client hello message the server must limit itself to choosing one of the supported options from our message. If we process a server key exchange message that chooses an unadvertised curve, abort the handshake w/ an error. Previously we would not note that the server chose a curve we didn't include in the client hello message, and would proceed with the handshake as long as the chosen curve was one that we've implemented. However, RFC 8422 5.1 makes it clear this is a server acting out-of-spec, as it says: If a server does not understand the Supported Elliptic Curves Extension, does not understand the Supported Point Formats Extension, or is unable to complete the ECC handshake while restricting itself to the enumerated curves and point formats, it MUST NOT negotiate the use of an ECC cipher suite. Changing our behaviour to enforce this also allows enabling the UnsupportedCurve BoGo test. Updates #72006 Change-Id: I27a2cd231e4b8762b0d9e2dbd3d8ddd5b87fd5cc Reviewed-on: https://go-review.googlesource.com/c/go/+/673735 TryBot-Bypass: Daniel McCarney <daniel@binaryparadox.net> Reviewed-by: David Chase <drchase@google.com> Auto-Submit: Daniel McCarney <daniel@binaryparadox.net> Reviewed-by: Filippo Valsorda <filippo@golang.org> Reviewed-by: Roland Shoemaker <roland@golang.org> |
||
|---|---|---|
| .github | ||
| api | ||
| doc | ||
| lib | ||
| misc | ||
| src | ||
| test | ||
| .gitattributes | ||
| .gitignore | ||
| CONTRIBUTING.md | ||
| LICENSE | ||
| PATENTS | ||
| README.md | ||
| SECURITY.md | ||
| codereview.cfg | ||
| go.env | ||
README.md
The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
Gopher image by Renee French, licensed under Creative Commons 4.0 Attribution license.
Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.
Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.
Download and Install
Binary Distributions
Official binary distributions are available at https://go.dev/dl/.
After downloading a binary release, visit https://go.dev/doc/install for installation instructions.
Install From Source
If a binary distribution is not available for your combination of operating system and architecture, visit https://go.dev/doc/install/source for source installation instructions.
Contributing
Go is the work of thousands of contributors. We appreciate your help!
To contribute, please read the contribution guidelines at https://go.dev/doc/contribute.
Note that the Go project uses the issue tracker for bug reports and proposals only. See https://go.dev/wiki/Questions for a list of places to ask questions about the Go language.