diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..eac8dfa
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,42 @@
+sudo: required
+language: go
+
+services:
+  - docker
+
+go:
+  - 1.7
+
+env:
+  - MODE=gotest
+  - MODE=interop CLIENT=boring
+  - MODE=interop CLIENT=boring REVISION=origin/master
+  - MODE=interop CLIENT=bogo
+  - MODE=interop CLIENT=bogo REVISION=origin/master
+  - MODE=interop CLIENT=tstclnt
+  - MODE=interop CLIENT=tstclnt REVISION=default
+  - MODE=interop CLIENT=mint
+
+matrix:
+  fast_finish: true
+  allow_failures:
+    - env: MODE=interop CLIENT=bogo REVISION=origin/master
+    - env: MODE=interop CLIENT=boring REVISION=origin/master
+    - env: MODE=interop CLIENT=tstclnt REVISION=default
+
+install:
+  - if [ "$MODE" = "interop" ]; then ./_dev/tris-localserver/start.sh -d && docker ps -a; fi
+  - if [ "$MODE" = "interop" ]; then ./_dev/interop.sh INSTALL $CLIENT $REVISION; fi
+
+script:
+  - if [ "$MODE" = "interop" ]; then ./_dev/interop.sh RUN $CLIENT 443; fi # ECDSA
+  - if [ "$MODE" = "interop" ]; then ./_dev/interop.sh RUN $CLIENT 4443; fi # RSA
+  - if [ "$MODE" = "gotest" ]; then ./_dev/go.sh test crypto/tls; fi
+
+after_script:
+  - if [ "$MODE" = "interop" ]; then docker ps -a; docker logs tris-localserver; fi
+
+cache:
+  directories:
+    - _dev/GOROOT
+    - _dev/go
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5a260bb
--- /dev/null
+++ b/README.md
@@ -0,0 +1,77 @@
+```
+ _____ _     ____        _        _
+|_   _| |   / ___|      | |_ _ __(_)___
+  | | | |   \___ \ _____| __| '__| / __|
+  | | | |___ ___) |_____| |_| |  | \__ \
+  |_| |_____|____/       \__|_|  |_|___/
+
+```
+
+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`.
diff --git a/_dev/.gitignore b/_dev/.gitignore
new file mode 100644
index 0000000..7bd4d28
--- /dev/null
+++ b/_dev/.gitignore
@@ -0,0 +1,4 @@
+/GOROOT
+/go
+/tris-localserver/tris-localserver
+/caddy/caddy
diff --git a/_dev/Makefile b/_dev/Makefile
new file mode 100644
index 0000000..c699600
--- /dev/null
+++ b/_dev/Makefile
@@ -0,0 +1,38 @@
+GO ?= go
+GOENV := $(shell $(GO) env GOOS)_$(shell $(GO) env GOARCH)
+GOROOTINFO := $(shell $(GO) version | cut -d' ' -f 3)_$(GOENV)
+
+.PHONY: GOROOT
+GOROOT: GOROOT/$(GOENV)/.ok_$(GOROOTINFO)
+	@rm -f GOROOT/$(GOENV)/pkg/*/crypto/tls.a
+
+GOROOT/$(GOENV)/.ok_$(GOROOTINFO):
+	rm -rf GOROOT/$(GOENV)
+	mkdir -p GOROOT/$(GOENV)/pkg
+	cp -r "$(shell $(GO) env GOROOT)/src" GOROOT/$(GOENV)/src
+	cp -r "$(shell $(GO) env GOROOT)/pkg/include" GOROOT/$(GOENV)/pkg/include
+	cp -r "$(shell $(GO) env GOROOT)/pkg/tool" GOROOT/$(GOENV)/pkg/tool
+	rm -r GOROOT/$(GOENV)/src/crypto/tls
+	ln -s ../../../../.. GOROOT/$(GOENV)/src/crypto/tls
+	GOROOT="$(CURDIR)/GOROOT/$(GOENV)" $(GO) install -v std
+ifeq ($(shell go env CGO_ENABLED),1)
+	GOROOT="$(CURDIR)/GOROOT/$(GOENV)" $(GO) install -race -v std
+endif
+	@touch "$@"
+
+GO_COMMIT := 5782050a487e002acfd14a3f4c2c815c7854928c
+
+.PHONY: go
+go: go/.ok_$(GO_COMMIT)_$(GOENV)
+
+go/.ok_$(GO_COMMIT)_$(GOENV):
+	rm -rf go/.ok_*_$(GOENV) go/$(GOENV)
+	mkdir -p go
+	git clone --branch 1.7.3 --single-branch --depth 25 https://github.com/cloudflare/go go/$(GOENV)
+	cd go/$(GOENV) && git checkout $(GO_COMMIT)
+	cd go/$(GOENV)/src && GOROOT_BOOTSTRAP="$(shell $(GO) env GOROOT)" ./make.bash
+	@touch "$@"
+
+.PHONY: clean
+clean:
+	rm -rf GOROOT go
diff --git a/_dev/bogo/Dockerfile b/_dev/bogo/Dockerfile
new file mode 100644
index 0000000..c75245f
--- /dev/null
+++ b/_dev/bogo/Dockerfile
@@ -0,0 +1,25 @@
+FROM alpine
+
+RUN apk add --update \
+    git \
+    cmake \
+    perl \
+    python \
+    build-base \
+    go \
+    ninja \
+  && rm -rf /var/cache/apk/*
+
+RUN git clone https://boringssl.googlesource.com/boringssl
+
+# see _dev/boring for REVISION info
+ARG REVISION=9b885c5
+
+RUN cd boringssl && git fetch
+RUN cd boringssl && git checkout $REVISION
+
+ADD bogo-client.go /bogo-client.go
+RUN go build /bogo-client.go
+
+ADD run.sh /run.sh
+ENTRYPOINT ["/run.sh"]
diff --git a/_dev/bogo/bogo-client.go b/_dev/bogo/bogo-client.go
new file mode 100644
index 0000000..6707303
--- /dev/null
+++ b/_dev/bogo/bogo-client.go
@@ -0,0 +1,28 @@
+package main
+
+import (
+	"log"
+	"net"
+	"net/http"
+	"os"
+
+	"./boringssl/ssl/test/runner"
+)
+
+func main() {
+	tr := &http.Transport{
+		DialTLS: func(network, addr string) (net.Conn, error) {
+			return runner.Dial(network, addr, &runner.Config{
+				InsecureSkipVerify: true,
+			})
+		},
+	}
+	client := &http.Client{Transport: tr}
+	resp, err := client.Get("https://" + os.Args[1])
+	if err != nil {
+		log.Fatal(err)
+	}
+	if err := resp.Write(os.Stdout); err != nil {
+		log.Fatal(err)
+	}
+}
diff --git a/_dev/bogo/run.sh b/_dev/bogo/run.sh
new file mode 100755
index 0000000..9f849a8
--- /dev/null
+++ b/_dev/bogo/run.sh
@@ -0,0 +1,3 @@
+#! /bin/sh
+
+exec /bogo-client "$@"
diff --git a/_dev/boring/Dockerfile b/_dev/boring/Dockerfile
new file mode 100644
index 0000000..2f08a37
--- /dev/null
+++ b/_dev/boring/Dockerfile
@@ -0,0 +1,47 @@
+FROM alpine
+
+RUN apk add --update \
+    git \
+    cmake \
+    perl \
+    python \
+    build-base \
+    go \
+    ninja \
+  && rm -rf /var/cache/apk/*
+
+RUN git clone https://boringssl.googlesource.com/boringssl
+RUN mkdir boringssl/build
+RUN cd boringssl/build && cmake -GNinja ..
+RUN cd boringssl && ninja -C build
+
+# Draft 14
+# ARG REVISION=88536c3
+
+# Draft 15
+# RUN cd boringssl && git fetch https://boringssl.googlesource.com/boringssl refs/changes/40/10840/18:draft15
+# ARG REVISION=cae930d
+
+# Draft "14.25" (sigalg renumbering)
+# ARG REVISION=af56fbd
+
+# Draft "14.25" w/ x25519 only
+# ARG REVISION=c8b6b4f
+
+# Draft "14.5" (sigalg, x25519, version ext)
+# ARG REVISION=54afdab
+
+# Draft 16
+# ARG REVISION=89917a5
+
+# Draft 18
+ARG REVISION=9b885c5
+
+RUN cd boringssl && git fetch
+RUN cd boringssl && git checkout $REVISION
+RUN cd boringssl/build && cmake -GNinja ..
+RUN cd boringssl && ninja -C build
+
+ADD httpreq.txt /httpreq.txt
+ADD run.sh /run.sh
+ENTRYPOINT ["/run.sh"]
diff --git a/_dev/boring/httpreq.txt b/_dev/boring/httpreq.txt
new file mode 100644
index 0000000..e4e6ac1
--- /dev/null
+++ b/_dev/boring/httpreq.txt
@@ -0,0 +1,5 @@
+GET / HTTP/1.1
+Host: example.com
+Connection: close
+
+
diff --git a/_dev/boring/run.sh b/_dev/boring/run.sh
new file mode 100755
index 0000000..7da9c43
--- /dev/null
+++ b/_dev/boring/run.sh
@@ -0,0 +1,3 @@
+#! /bin/sh
+
+exec /boringssl/build/tool/bssl s_client -min-version tls1.3 -max-version tls1.3 -connect "$@" < /httpreq.txt
diff --git a/_dev/caddy/Caddyfile b/_dev/caddy/Caddyfile
new file mode 100644
index 0000000..10c462c
--- /dev/null
+++ b/_dev/caddy/Caddyfile
@@ -0,0 +1,12 @@
+tris.filippo.io {
+	tls bip@filippo.io
+	gzip
+	log stdout
+	proxy / https://blog.filippo.io
+}
+
+cf.tris.filippo.io {
+	tls bip@filippo.io
+	log stdout
+	proxy / https://blog.cloudflare.com
+}
diff --git a/_dev/caddy/Dockerfile b/_dev/caddy/Dockerfile
new file mode 100644
index 0000000..9f870fd
--- /dev/null
+++ b/_dev/caddy/Dockerfile
@@ -0,0 +1,18 @@
+FROM scratch
+
+# docker create -v /root/.caddy --name caddy-data caddy /bin/true
+# docker run -d --restart always --volumes-from caddy-data -p 80:80 -p 443:443 caddy
+
+# go get -d -v github.com/mholt/caddy/caddy
+# GOOS=linux ../go.sh build -v -i github.com/mholt/caddy/caddy
+ADD caddy caddy
+ADD Caddyfile Caddyfile
+ADD https://mkcert.org/generate/ /etc/ssl/certs/ca-certificates.crt
+
+EXPOSE 80
+EXPOSE 443
+
+ENV TLSDEBUG error
+ENV HOME /root/
+
+CMD [ "/caddy" ]
diff --git a/_dev/caddy/caddy.patch b/_dev/caddy/caddy.patch
new file mode 100644
index 0000000..3332c2c
--- /dev/null
+++ b/_dev/caddy/caddy.patch
@@ -0,0 +1,56 @@
+diff --git a/caddytls/config.go b/caddytls/config.go
+index 91c7451..c3e87d5 100644
+--- a/caddytls/config.go
++++ b/caddytls/config.go
+@@ -241,6 +241,7 @@ func MakeTLSConfig(configs []*Config) (*tls.Config, error) {
+ 		if i > 0 && cfg.PreferServerCipherSuites != configs[i-1].PreferServerCipherSuites {
+ 			return nil, fmt.Errorf("cannot both use PreferServerCipherSuites and not use it")
+ 		}
++		config.PreferServerCipherSuites = cfg.PreferServerCipherSuites
+ 
+ 		// Go with the widest range of protocol versions
+ 		if cfg.ProtocolMinVersion < config.MinVersion {
+@@ -335,7 +336,7 @@ func SetDefaultTLSParams(config *Config) {
+ 		config.ProtocolMinVersion = tls.VersionTLS11
+ 	}
+ 	if config.ProtocolMaxVersion == 0 {
+-		config.ProtocolMaxVersion = tls.VersionTLS12
++		config.ProtocolMaxVersion = tls.VersionTLS13
+ 	}
+ 
+ 	// Prefer server cipher suites
+@@ -357,6 +358,7 @@ var supportedProtocols = map[string]uint16{
+ 	"tls1.0": tls.VersionTLS10,
+ 	"tls1.1": tls.VersionTLS11,
+ 	"tls1.2": tls.VersionTLS12,
++	"tls1.3": tls.VersionTLS13,
+ }
+ 
+ // Map of supported ciphers, used only for parsing config.
+@@ -370,6 +372,8 @@ var supportedProtocols = map[string]uint16{
+ //
+ // This map, like any map, is NOT ORDERED. Do not range over this map.
+ var supportedCiphersMap = map[string]uint16{
++	"ECDHE-ECDSA-CHACHA20-POLY1305": tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
++	"ECDHE-RSA-CHACHA20-POLY1305":   tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
+ 	"ECDHE-RSA-AES256-GCM-SHA384":   tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
+ 	"ECDHE-ECDSA-AES256-GCM-SHA384": tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
+ 	"ECDHE-RSA-AES128-GCM-SHA256":   tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
+@@ -391,6 +395,8 @@ var supportedCiphersMap = map[string]uint16{
+ // Note that TLS_FALLBACK_SCSV is not in this list since it is always
+ // added manually.
+ var supportedCiphers = []uint16{
++	tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
++	tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
+ 	tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
+ 	tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
+ 	tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
+@@ -407,6 +413,8 @@ var supportedCiphers = []uint16{
+ 
+ // List of all the ciphers we want to use by default
+ var defaultCiphers = []uint16{
++	tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
++	tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
+ 	tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
+ 	tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
+ 	tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
diff --git a/_dev/go.sh b/_dev/go.sh
new file mode 100755
index 0000000..fa7babf
--- /dev/null
+++ b/_dev/go.sh
@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -e
+
+BASEDIR=$(cd "$(dirname "$0")" && pwd)
+
+make --quiet -C "$BASEDIR" go >&2
+GOENV="$(go env GOOS)_$(go env GOARCH)"
+
+unset GOROOT
+make --quiet -C "$BASEDIR" GOROOT GO="$BASEDIR/go/$GOENV/bin/go" >&2
+export GOROOT="$BASEDIR/GOROOT/$GOENV"
+
+exec $BASEDIR/go/$GOENV/bin/go "$@"
diff --git a/_dev/interop.sh b/_dev/interop.sh
new file mode 100755
index 0000000..4f9ac30
--- /dev/null
+++ b/_dev/interop.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -xeuo pipefail
+
+if [ "$1" = "INSTALL" ]; then
+		if [ -n "${3:-}" ]; then
+				REVISION="--build-arg REVISION=$3"
+		else
+				REVISION=""
+		fi
+		docker build $REVISION -t tls-tris:$2 _dev/$2
+
+elif [ "$1" = "RUN" ]; then
+		IP=$(docker inspect -f '{{ .NetworkSettings.IPAddress }}' tris-localserver)
+		docker run -i --rm tls-tris:$2 $IP:$3 | tee output.txt
+		grep "Hello TLS 1.3" output.txt
+
+fi
diff --git a/_dev/mint/Dockerfile b/_dev/mint/Dockerfile
new file mode 100644
index 0000000..5e769f2
--- /dev/null
+++ b/_dev/mint/Dockerfile
@@ -0,0 +1,21 @@
+FROM golang:1.7-alpine
+
+RUN apk add --update \
+    git \
+  && rm -rf /var/cache/apk/*
+
+RUN go get github.com/bifurcation/mint
+
+# Draft 18
+ARG REVISION=271abd1
+
+RUN cd /go/src/github.com/bifurcation/mint && git fetch
+RUN cd /go/src/github.com/bifurcation/mint && git checkout $REVISION
+
+ADD mint-client.go /mint-client.go
+RUN GOBIN=/ go install /mint-client.go
+
+ENV MINT_LOG=*
+
+ADD run.sh /run.sh
+ENTRYPOINT ["/run.sh"]
diff --git a/_dev/mint/mint-client.go b/_dev/mint/mint-client.go
new file mode 100644
index 0000000..d344e3e
--- /dev/null
+++ b/_dev/mint/mint-client.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+	"log"
+	"net"
+	"net/http"
+	"os"
+
+	"github.com/bifurcation/mint"
+)
+
+func main() {
+	tr := &http.Transport{
+		DialTLS: func(network, addr string) (net.Conn, error) {
+			return mint.Dial(network, addr, nil)
+		},
+	}
+	client := &http.Client{Transport: tr}
+	resp, err := client.Get("https://" + os.Args[1])
+	if err != nil {
+		log.Fatal(err)
+	}
+	if err := resp.Write(os.Stdout); err != nil {
+		log.Fatal(err)
+	}
+}
diff --git a/_dev/mint/run.sh b/_dev/mint/run.sh
new file mode 100755
index 0000000..013915a
--- /dev/null
+++ b/_dev/mint/run.sh
@@ -0,0 +1,3 @@
+#! /bin/sh
+
+exec /mint-client "$@"
diff --git a/_dev/tris-localserver/Dockerfile b/_dev/tris-localserver/Dockerfile
new file mode 100644
index 0000000..fd5ef67
--- /dev/null
+++ b/_dev/tris-localserver/Dockerfile
@@ -0,0 +1,10 @@
+FROM scratch
+
+# GOOS=linux ../go.sh build -v -i .
+ADD tris-localserver ./
+
+ENV TLSDEBUG error
+
+EXPOSE 443
+EXPOSE 4443
+CMD [ "./tris-localserver", "0.0.0.0:443", "0.0.0.0:4443" ]
diff --git a/_dev/tris-localserver/server.go b/_dev/tris-localserver/server.go
new file mode 100644
index 0000000..afc0872
--- /dev/null
+++ b/_dev/tris-localserver/server.go
@@ -0,0 +1,124 @@
+package main
+
+import (
+	"crypto/tls"
+	"encoding/hex"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+)
+
+var tlsVersionToName = map[uint16]string{
+	tls.VersionTLS10: "1.0",
+	tls.VersionTLS11: "1.1",
+	tls.VersionTLS12: "1.2",
+	tls.VersionTLS13: "1.3",
+	0x7f00 | 16:      "1.3 (draft 16)",
+	0x7f00 | 18:      "1.3 (draft 18)",
+}
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprintf(w, "<!DOCTYPE html><p>Hello TLS %s _o/\n", tlsVersionToName[r.TLS.Version])
+	})
+
+	http.HandleFunc("/ch", func(w http.ResponseWriter, r *http.Request) {
+		r.Header.Set("Content-Type", "text/plain")
+		fmt.Fprintf(w, "Client Hello packet (%d bytes):\n%s", len(r.TLS.ClientHello), hex.Dump(r.TLS.ClientHello))
+	})
+
+	go func() {
+		if len(os.Args) < 3 {
+			return
+		}
+		cert, err := tls.X509KeyPair([]byte(rsaCert), []byte(rsaKey))
+		if err != nil {
+			log.Fatal(err)
+		}
+		s := &http.Server{
+			Addr: os.Args[2],
+			TLSConfig: &tls.Config{
+				Certificates:             []tls.Certificate{cert},
+				PreferServerCipherSuites: true,
+			},
+		}
+		log.Fatal(s.ListenAndServeTLS("", ""))
+	}()
+
+	cert, err := tls.X509KeyPair([]byte(ecdsaCert), []byte(ecdsaKey))
+	if err != nil {
+		log.Fatal(err)
+	}
+	s := &http.Server{
+		Addr: os.Args[1],
+		TLSConfig: &tls.Config{
+			Certificates:             []tls.Certificate{cert},
+			PreferServerCipherSuites: true,
+		},
+	}
+	log.Fatal(s.ListenAndServeTLS("", ""))
+}
+
+const (
+	rsaKey = `-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----`
+	rsaCert = `-----BEGIN CERTIFICATE-----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==
+-----END CERTIFICATE-----`
+	ecdsaCert = `-----BEGIN CERTIFICATE-----
+MIIBbTCCAROgAwIBAgIQZCsHZcs5ZkzV+zC2E6j5RzAKBggqhkjOPQQDAjASMRAw
+DgYDVQQKEwdBY21lIENvMB4XDTE2MDkyNDE3NTE1OFoXDTI2MDkyMjE3NTE1OFow
+EjEQMA4GA1UEChMHQWNtZSBDbzBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABDTO
+B3IyzjYfKCp2HWy+P3QHxhdBT4AUGYgwTiSEj5phumPIahFNcOSWptN0UzlZvJdN
+MMjVmrFYK/FjF4abkNKjSzBJMA4GA1UdDwEB/wQEAwIFoDATBgNVHSUEDDAKBggr
+BgEFBQcDATAMBgNVHRMBAf8EAjAAMBQGA1UdEQQNMAuCCWxvY2FsaG9zdDAKBggq
+hkjOPQQDAgNIADBFAiEAp9W157PM1IadPBc33Cbj7vaFvp+rXs/hSuMCzP8pgV8C
+IHCswo1qiC0ZjQmWsBlmz5Zbp9rOorIzBYmGRhRdNs3j
+-----END CERTIFICATE-----`
+	ecdsaKey = `-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIFdhO7IW5UIwpB1e2Vunm9QyKvUHWcVwGfLjhpOajuR7oAoGCCqGSM49
+AwEHoUQDQgAENM4HcjLONh8oKnYdbL4/dAfGF0FPgBQZiDBOJISPmmG6Y8hqEU1w
+5Jam03RTOVm8l00wyNWasVgr8WMXhpuQ0g==
+-----END EC PRIVATE KEY-----`
+)
diff --git a/_dev/tris-localserver/start.sh b/_dev/tris-localserver/start.sh
new file mode 100755
index 0000000..edd54f3
--- /dev/null
+++ b/_dev/tris-localserver/start.sh
@@ -0,0 +1,9 @@
+#! /bin/sh
+set -e
+
+cd "$(dirname $0)"
+
+CGO_ENABLED=0 GOOS=linux ../go.sh build -v -i .
+docker build -t tris-localserver .
+exec docker run --name tris-localserver --env TLSDEBUG=error "$@" tris-localserver
+
diff --git a/_dev/tstclnt/Dockerfile b/_dev/tstclnt/Dockerfile
new file mode 100644
index 0000000..530be04
--- /dev/null
+++ b/_dev/tstclnt/Dockerfile
@@ -0,0 +1,41 @@
+FROM buildpack-deps
+
+RUN hg clone https://hg.mozilla.org/projects/nspr
+RUN hg clone https://hg.mozilla.org/projects/nss
+
+ENV USE_64=1 NSS_ENABLE_TLS_1_3=1
+# Incremental build snapshot disabled as dependencies don't seem to be solid:
+# the same value changed in a header file would apply to one .c file and not another
+# RUN cd nss && make nss_build_all
+
+# Draft 15
+# ARG REVISION=c483e5f9e0bc
+
+# Draft 16
+# ARG REVISION=3e7b53b18112
+
+# Draft 18
+ARG REVISION=b6dfef6d0ff0
+
+RUN cd nss && hg pull
+RUN cd nss && hg checkout -C $REVISION
+
+ADD *.patch ./
+RUN for p in *.patch; do patch -p1 -d nss < $p; done
+
+RUN cd nss && make nss_build_all
+
+# ENV HOST=localhost
+# RUN cd nss/tests/ssl_gtests && ./ssl_gtests.sh
+
+RUN cd nss && make install
+
+RUN mv /dist/$(uname -s)$(uname -r | cut -f 1-2 -d . -)_$(uname -m)_${CC:-cc}_glibc_PTH_64_$([ -n "$BUILD_OPT" ] && echo OPT || echo DBG).OBJ /dist/OBJ-PATH
+
+ENV LD_LIBRARY_PATH=/dist/OBJ-PATH/lib
+
+ENV SSLTRACE=100 SSLDEBUG=100
+
+ADD httpreq.txt /httpreq.txt
+ADD run.sh /run.sh
+ENTRYPOINT ["/run.sh"]
diff --git a/_dev/tstclnt/httpreq.txt b/_dev/tstclnt/httpreq.txt
new file mode 100644
index 0000000..e4e6ac1
--- /dev/null
+++ b/_dev/tstclnt/httpreq.txt
@@ -0,0 +1,5 @@
+GET / HTTP/1.1
+Host: example.com
+Connection: close
+
+
diff --git a/_dev/tstclnt/poll.patch b/_dev/tstclnt/poll.patch
new file mode 100644
index 0000000..b7f92bc
--- /dev/null
+++ b/_dev/tstclnt/poll.patch
@@ -0,0 +1,37 @@
+diff -r 15c6a01b9fe8 cmd/tstclnt/tstclnt.c
+--- a/cmd/tstclnt/tstclnt.c	Fri Jun 10 18:34:00 2016 +0100
++++ b/cmd/tstclnt/tstclnt.c	Thu Jun 16 16:26:29 2016 +0100
+@@ -713,7 +713,6 @@
+     return NSS_GetClientAuthData(arg, socket, caNames, pRetCert, pRetKey);
+ }
+ 
+-#if defined(WIN32) || defined(OS2)
+ void
+ thread_main(void *arg)
+ {
+@@ -746,7 +745,6 @@
+     PR_Close(ps);
+ }
+ 
+-#endif
+ 
+ static void
+ printHostNameAndAddr(const char *host, const PRNetAddr *addr)
+@@ -1545,7 +1543,8 @@
+     npds = 2;
+     std_out = PR_GetSpecialFD(PR_StandardOutput);
+ 
+-#if defined(WIN32) || defined(OS2)
++    // Enabled PR_Poll compatibility mode for running in docker run. (sigh).
++
+     /* PR_Poll cannot be used with stdin on Windows or OS/2.  (sigh).
+     ** But use of PR_Poll and non-blocking sockets is a major feature
+     ** of this program.  So, we simulate a pollable stdin with a
+@@ -1573,7 +1572,6 @@
+             goto done;
+         }
+     }
+-#endif
+ 
+     if (serverCertAuth.testFreshStatusFromSideChannel) {
+         SSL_ForceHandshake(s);
diff --git a/_dev/tstclnt/run.sh b/_dev/tstclnt/run.sh
new file mode 100755
index 0000000..8ea9600
--- /dev/null
+++ b/_dev/tstclnt/run.sh
@@ -0,0 +1,8 @@
+#! /bin/bash
+
+IFS=':' read -ra ADDR <<< "$1"
+shift
+HOST="${ADDR[0]}"
+PORT="${ADDR[1]}"
+
+exec /dist/OBJ-PATH/bin/tstclnt -D -V tls1.3:tls1.3 -o -O -h $HOST -p $PORT -v "$@" < /httpreq.txt