tls-tris/README.md

```
 _____ _     ____        _        _
|_   _| |   / ___|      | |_ _ __(_)___
  | | | |   \___ \ _____| __| '__| / __|
  | | | |___ ___) |_____| |_| |  | \__ \
  |_| |_____|____/       \__|_|  |_|___/

```

crypto/tls, now with 100% more 1.3.

DO NOT USE THIS FOR THE SAKE OF EVERYTHING THAT'S GOOD AND JUST.

[![Build Status](https://travis-ci.org/cloudflare/tls-tris.svg?branch=master)](https://travis-ci.org/cloudflare/tls-tris)

## Usage

Since `crypto/tls` is very deeply (and not that elegantly) coupled with the Go stdlib,
tls-tris shouldn't be used as an external package.  It is also impossible to vendor it
as `crypto/tls` because stdlib packages would import the standard one and mismatch.

So, to build with tls-tris, you need to use a custom GOROOT.
A script is provided that will take care of it for you: `./_dev/go.sh`.
Just use that instead of the `go` tool.

The script also transparently fetches the custom Cloudflare Go compiler with the required backports.

```
./_dev/go.sh build ./_dev/tris-localserver
TLSDEBUG=error ./tris-localserver 127.0.0.1:4443
```

## Debugging

When the environment variable `TLSDEBUG` is set to `error`, Tris will print a hexdump of the Client Hello and a stack trace if an handshake error occurs.

## Building Caddy

```
./_dev/go.sh build github.com/mholt/caddy
```

*Note: to get Caddy to use TLS 1.3 you'll have to apply the patch at `_dev/caddy/caddy.patch`.*

## Testing with Firefox

1. Download the latest Firefox Nightly
1. Navigate to about:config and set `security.tls.version.max` to `4`
1. Connect to https://tris.filippo.io/ or tris-localserver

## Testing with BoringSSL/BoGo/NSS/Mint

```
./_dev/tris-localserver/start.sh --rm
```

```
docker build -t tls-tris:boring _dev/boring
docker run -i --rm tls-tris:boring $(docker inspect -f '{{ .NetworkSettings.IPAddress }}' tris-localserver):443
```

```
docker build -t tls-tris:bogo _dev/bogo
docker run -i --rm tls-tris:bogo $(docker inspect -f '{{ .NetworkSettings.IPAddress }}' tris-localserver):443
```

```
docker build -t tls-tris:tstclnt _dev/tstclnt
docker run -i --rm tls-tris:tstclnt $(docker inspect -f '{{ .NetworkSettings.IPAddress }}' tris-localserver):443
```

```
docker build -t tls-tris:mint _dev/mint
docker run -i --rm tls-tris:mint $(docker inspect -f '{{ .NetworkSettings.IPAddress }}' tris-localserver):443
```

To build a specific revision, use `--build-arg REVISION=abcdef1234`.