Vendor integration dependencies.

integration/vendor/github.com/docker/go-connections/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        https://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
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+          notices within Derivative Works that You distribute, alongside
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+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
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+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
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+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Docker, Inc.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       https://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

integration/vendor/github.com/docker/go-connections/doc.go

@@ -0,0 +1,3 @@
+// Package connections provides libraries to work with network connections.
+// This library is divided in several components for specific usage.
+package connections

integration/vendor/github.com/docker/go-connections/nat/nat.go

@@ -0,0 +1,239 @@
+// Package nat is a convenience package for manipulation of strings describing network ports.
+package nat
+
+import (
+	"fmt"
+	"net"
+	"strconv"
+	"strings"
+)
+
+const (
+	// portSpecTemplate is the expected format for port specifications
+	portSpecTemplate = "ip:hostPort:containerPort"
+)
+
+// PortBinding represents a binding between a Host IP address and a Host Port
+type PortBinding struct {
+	// HostIP is the host IP Address
+	HostIP string `json:"HostIp"`
+	// HostPort is the host port number
+	HostPort string
+}
+
+// PortMap is a collection of PortBinding indexed by Port
+type PortMap map[Port][]PortBinding
+
+// PortSet is a collection of structs indexed by Port
+type PortSet map[Port]struct{}
+
+// Port is a string containing port number and protocol in the format "80/tcp"
+type Port string
+
+// NewPort creates a new instance of a Port given a protocol and port number or port range
+func NewPort(proto, port string) (Port, error) {
+	// Check for parsing issues on "port" now so we can avoid having
+	// to check it later on.
+
+	portStartInt, portEndInt, err := ParsePortRangeToInt(port)
+	if err != nil {
+		return "", err
+	}
+
+	if portStartInt == portEndInt {
+		return Port(fmt.Sprintf("%d/%s", portStartInt, proto)), nil
+	}
+	return Port(fmt.Sprintf("%d-%d/%s", portStartInt, portEndInt, proto)), nil
+}
+
+// ParsePort parses the port number string and returns an int
+func ParsePort(rawPort string) (int, error) {
+	if len(rawPort) == 0 {
+		return 0, nil
+	}
+	port, err := strconv.ParseUint(rawPort, 10, 16)
+	if err != nil {
+		return 0, err
+	}
+	return int(port), nil
+}
+
+// ParsePortRangeToInt parses the port range string and returns start/end ints
+func ParsePortRangeToInt(rawPort string) (int, int, error) {
+	if len(rawPort) == 0 {
+		return 0, 0, nil
+	}
+	start, end, err := ParsePortRange(rawPort)
+	if err != nil {
+		return 0, 0, err
+	}
+	return int(start), int(end), nil
+}
+
+// Proto returns the protocol of a Port
+func (p Port) Proto() string {
+	proto, _ := SplitProtoPort(string(p))
+	return proto
+}
+
+// Port returns the port number of a Port
+func (p Port) Port() string {
+	_, port := SplitProtoPort(string(p))
+	return port
+}
+
+// Int returns the port number of a Port as an int
+func (p Port) Int() int {
+	portStr := p.Port()
+	// We don't need to check for an error because we're going to
+	// assume that any error would have been found, and reported, in NewPort()
+	port, _ := ParsePort(portStr)
+	return port
+}
+
+// Range returns the start/end port numbers of a Port range as ints
+func (p Port) Range() (int, int, error) {
+	return ParsePortRangeToInt(p.Port())
+}
+
+// SplitProtoPort splits a port in the format of proto/port
+func SplitProtoPort(rawPort string) (string, string) {
+	parts := strings.Split(rawPort, "/")
+	l := len(parts)
+	if len(rawPort) == 0 || l == 0 || len(parts[0]) == 0 {
+		return "", ""
+	}
+	if l == 1 {
+		return "tcp", rawPort
+	}
+	if len(parts[1]) == 0 {
+		return "tcp", parts[0]
+	}
+	return parts[1], parts[0]
+}
+
+func validateProto(proto string) bool {
+	for _, availableProto := range []string{"tcp", "udp"} {
+		if availableProto == proto {
+			return true
+		}
+	}
+	return false
+}
+
+// ParsePortSpecs receives port specs in the format of ip:public:private/proto and parses
+// these in to the internal types
+func ParsePortSpecs(ports []string) (map[Port]struct{}, map[Port][]PortBinding, error) {
+	var (
+		exposedPorts = make(map[Port]struct{}, len(ports))
+		bindings     = make(map[Port][]PortBinding)
+	)
+	for _, rawPort := range ports {
+		portMappings, err := ParsePortSpec(rawPort)
+		if err != nil {
+			return nil, nil, err
+		}
+
+		for _, portMapping := range portMappings {
+			port := portMapping.Port
+			if _, exists := exposedPorts[port]; !exists {
+				exposedPorts[port] = struct{}{}
+			}
+			bslice, exists := bindings[port]
+			if !exists {
+				bslice = []PortBinding{}
+			}
+			bindings[port] = append(bslice, portMapping.Binding)
+		}
+	}
+	return exposedPorts, bindings, nil
+}
+
+// PortMapping is a data object mapping a Port to a PortBinding
+type PortMapping struct {
+	Port    Port
+	Binding PortBinding
+}
+
+// ParsePortSpec parses a port specification string into a slice of PortMappings
+func ParsePortSpec(rawPort string) ([]PortMapping, error) {
+	proto := "tcp"
+
+	if i := strings.LastIndex(rawPort, "/"); i != -1 {
+		proto = rawPort[i+1:]
+		rawPort = rawPort[:i]
+	}
+	if !strings.Contains(rawPort, ":") {
+		rawPort = fmt.Sprintf("::%s", rawPort)
+	} else if len(strings.Split(rawPort, ":")) == 2 {
+		rawPort = fmt.Sprintf(":%s", rawPort)
+	}
+
+	parts, err := PartParser(portSpecTemplate, rawPort)
+	if err != nil {
+		return nil, err
+	}
+
+	var (
+		containerPort = parts["containerPort"]
+		rawIP         = parts["ip"]
+		hostPort      = parts["hostPort"]
+	)
+
+	if rawIP != "" && net.ParseIP(rawIP) == nil {
+		return nil, fmt.Errorf("Invalid ip address: %s", rawIP)
+	}
+	if containerPort == "" {
+		return nil, fmt.Errorf("No port specified: %s<empty>", rawPort)
+	}
+
+	startPort, endPort, err := ParsePortRange(containerPort)
+	if err != nil {
+		return nil, fmt.Errorf("Invalid containerPort: %s", containerPort)
+	}
+
+	var startHostPort, endHostPort uint64 = 0, 0
+	if len(hostPort) > 0 {
+		startHostPort, endHostPort, err = ParsePortRange(hostPort)
+		if err != nil {
+			return nil, fmt.Errorf("Invalid hostPort: %s", hostPort)
+		}
+	}
+
+	if hostPort != "" && (endPort-startPort) != (endHostPort-startHostPort) {
+		// Allow host port range iff containerPort is not a range.
+		// In this case, use the host port range as the dynamic
+		// host port range to allocate into.
+		if endPort != startPort {
+			return nil, fmt.Errorf("Invalid ranges specified for container and host Ports: %s and %s", containerPort, hostPort)
+		}
+	}
+
+	if !validateProto(strings.ToLower(proto)) {
+		return nil, fmt.Errorf("Invalid proto: %s", proto)
+	}
+
+	ports := []PortMapping{}
+	for i := uint64(0); i <= (endPort - startPort); i++ {
+		containerPort = strconv.FormatUint(startPort+i, 10)
+		if len(hostPort) > 0 {
+			hostPort = strconv.FormatUint(startHostPort+i, 10)
+		}
+		// Set hostPort to a range only if there is a single container port
+		// and a dynamic host port.
+		if startPort == endPort && startHostPort != endHostPort {
+			hostPort = fmt.Sprintf("%s-%s", hostPort, strconv.FormatUint(endHostPort, 10))
+		}
+		port, err := NewPort(strings.ToLower(proto), containerPort)
+		if err != nil {
+			return nil, err
+		}
+
+		binding := PortBinding{
+			HostIP:   rawIP,
+			HostPort: hostPort,
+		}
+		ports = append(ports, PortMapping{Port: port, Binding: binding})
+	}
+	return ports, nil
+}

integration/vendor/github.com/docker/go-connections/nat/parse.go

@@ -0,0 +1,56 @@
+package nat
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// PartParser parses and validates the specified string (data) using the specified template
+// e.g. ip:public:private -> 192.168.0.1:80:8000
+func PartParser(template, data string) (map[string]string, error) {
+	// ip:public:private
+	var (
+		templateParts = strings.Split(template, ":")
+		parts         = strings.Split(data, ":")
+		out           = make(map[string]string, len(templateParts))
+	)
+	if len(parts) != len(templateParts) {
+		return nil, fmt.Errorf("Invalid format to parse. %s should match template %s", data, template)
+	}
+
+	for i, t := range templateParts {
+		value := ""
+		if len(parts) > i {
+			value = parts[i]
+		}
+		out[t] = value
+	}
+	return out, nil
+}
+
+// ParsePortRange parses and validates the specified string as a port-range (8000-9000)
+func ParsePortRange(ports string) (uint64, uint64, error) {
+	if ports == "" {
+		return 0, 0, fmt.Errorf("Empty string specified for ports.")
+	}
+	if !strings.Contains(ports, "-") {
+		start, err := strconv.ParseUint(ports, 10, 16)
+		end := start
+		return start, end, err
+	}
+
+	parts := strings.Split(ports, "-")
+	start, err := strconv.ParseUint(parts[0], 10, 16)
+	if err != nil {
+		return 0, 0, err
+	}
+	end, err := strconv.ParseUint(parts[1], 10, 16)
+	if err != nil {
+		return 0, 0, err
+	}
+	if end < start {
+		return 0, 0, fmt.Errorf("Invalid range specified for the Port: %s", ports)
+	}
+	return start, end, nil
+}

integration/vendor/github.com/docker/go-connections/nat/sort.go

@@ -0,0 +1,96 @@
+package nat
+
+import (
+	"sort"
+	"strings"
+)
+
+type portSorter struct {
+	ports []Port
+	by    func(i, j Port) bool
+}
+
+func (s *portSorter) Len() int {
+	return len(s.ports)
+}
+
+func (s *portSorter) Swap(i, j int) {
+	s.ports[i], s.ports[j] = s.ports[j], s.ports[i]
+}
+
+func (s *portSorter) Less(i, j int) bool {
+	ip := s.ports[i]
+	jp := s.ports[j]
+
+	return s.by(ip, jp)
+}
+
+// Sort sorts a list of ports using the provided predicate
+// This function should compare `i` and `j`, returning true if `i` is
+// considered to be less than `j`
+func Sort(ports []Port, predicate func(i, j Port) bool) {
+	s := &portSorter{ports, predicate}
+	sort.Sort(s)
+}
+
+type portMapEntry struct {
+	port    Port
+	binding PortBinding
+}
+
+type portMapSorter []portMapEntry
+
+func (s portMapSorter) Len() int      { return len(s) }
+func (s portMapSorter) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
+
+// sort the port so that the order is:
+// 1. port with larger specified bindings
+// 2. larger port
+// 3. port with tcp protocol
+func (s portMapSorter) Less(i, j int) bool {
+	pi, pj := s[i].port, s[j].port
+	hpi, hpj := toInt(s[i].binding.HostPort), toInt(s[j].binding.HostPort)
+	return hpi > hpj || pi.Int() > pj.Int() || (pi.Int() == pj.Int() && strings.ToLower(pi.Proto()) == "tcp")
+}
+
+// SortPortMap sorts the list of ports and their respected mapping. The ports
+// will explicit HostPort will be placed first.
+func SortPortMap(ports []Port, bindings PortMap) {
+	s := portMapSorter{}
+	for _, p := range ports {
+		if binding, ok := bindings[p]; ok {
+			for _, b := range binding {
+				s = append(s, portMapEntry{port: p, binding: b})
+			}
+			bindings[p] = []PortBinding{}
+		} else {
+			s = append(s, portMapEntry{port: p})
+		}
+	}
+
+	sort.Sort(s)
+	var (
+		i  int
+		pm = make(map[Port]struct{})
+	)
+	// reorder ports
+	for _, entry := range s {
+		if _, ok := pm[entry.port]; !ok {
+			ports[i] = entry.port
+			pm[entry.port] = struct{}{}
+			i++
+		}
+		// reorder bindings for this port
+		if _, ok := bindings[entry.port]; ok {
+			bindings[entry.port] = append(bindings[entry.port], entry.binding)
+		}
+	}
+}
+
+func toInt(s string) uint64 {
+	i, _, err := ParsePortRange(s)
+	if err != nil {
+		i = 0
+	}
+	return i
+}

integration/vendor/github.com/docker/go-connections/sockets/inmem_socket.go

@@ -0,0 +1,81 @@
+package sockets
+
+import (
+	"errors"
+	"net"
+	"sync"
+)
+
+var errClosed = errors.New("use of closed network connection")
+
+// InmemSocket implements net.Listener using in-memory only connections.
+type InmemSocket struct {
+	chConn  chan net.Conn
+	chClose chan struct{}
+	addr    string
+	mu      sync.Mutex
+}
+
+// dummyAddr is used to satisfy net.Addr for the in-mem socket
+// it is just stored as a string and returns the string for all calls
+type dummyAddr string
+
+// NewInmemSocket creates an in-memory only net.Listener
+// The addr argument can be any string, but is used to satisfy the `Addr()` part
+// of the net.Listener interface
+func NewInmemSocket(addr string, bufSize int) *InmemSocket {
+	return &InmemSocket{
+		chConn:  make(chan net.Conn, bufSize),
+		chClose: make(chan struct{}),
+		addr:    addr,
+	}
+}
+
+// Addr returns the socket's addr string to satisfy net.Listener
+func (s *InmemSocket) Addr() net.Addr {
+	return dummyAddr(s.addr)
+}
+
+// Accept implements the Accept method in the Listener interface; it waits for the next call and returns a generic Conn.
+func (s *InmemSocket) Accept() (net.Conn, error) {
+	select {
+	case conn := <-s.chConn:
+		return conn, nil
+	case <-s.chClose:
+		return nil, errClosed
+	}
+}
+
+// Close closes the listener. It will be unavailable for use once closed.
+func (s *InmemSocket) Close() error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	select {
+	case <-s.chClose:
+	default:
+		close(s.chClose)
+	}
+	return nil
+}
+
+// Dial is used to establish a connection with the in-mem server
+func (s *InmemSocket) Dial(network, addr string) (net.Conn, error) {
+	srvConn, clientConn := net.Pipe()
+	select {
+	case s.chConn <- srvConn:
+	case <-s.chClose:
+		return nil, errClosed
+	}
+
+	return clientConn, nil
+}
+
+// Network returns the addr string, satisfies net.Addr
+func (a dummyAddr) Network() string {
+	return string(a)
+}
+
+// String returns the string form
+func (a dummyAddr) String() string {
+	return string(a)
+}

integration/vendor/github.com/docker/go-connections/sockets/proxy.go

@@ -0,0 +1,51 @@
+package sockets
+
+import (
+	"net"
+	"net/url"
+	"os"
+	"strings"
+
+	"golang.org/x/net/proxy"
+)
+
+// GetProxyEnv allows access to the uppercase and the lowercase forms of
+// proxy-related variables.  See the Go specification for details on these
+// variables. https://golang.org/pkg/net/http/
+func GetProxyEnv(key string) string {
+	proxyValue := os.Getenv(strings.ToUpper(key))
+	if proxyValue == "" {
+		return os.Getenv(strings.ToLower(key))
+	}
+	return proxyValue
+}
+
+// DialerFromEnvironment takes in a "direct" *net.Dialer and returns a
+// proxy.Dialer which will route the connections through the proxy using the
+// given dialer.
+func DialerFromEnvironment(direct *net.Dialer) (proxy.Dialer, error) {
+	allProxy := GetProxyEnv("all_proxy")
+	if len(allProxy) == 0 {
+		return direct, nil
+	}
+
+	proxyURL, err := url.Parse(allProxy)
+	if err != nil {
+		return direct, err
+	}
+
+	proxyFromURL, err := proxy.FromURL(proxyURL, direct)
+	if err != nil {
+		return direct, err
+	}
+
+	noProxy := GetProxyEnv("no_proxy")
+	if len(noProxy) == 0 {
+		return proxyFromURL, nil
+	}
+
+	perHost := proxy.NewPerHost(proxyFromURL, direct)
+	perHost.AddFromString(noProxy)
+
+	return perHost, nil
+}

integration/vendor/github.com/docker/go-connections/sockets/sockets.go

@@ -0,0 +1,42 @@
+// Package sockets provides helper functions to create and configure Unix or TCP sockets.
+package sockets
+
+import (
+	"net"
+	"net/http"
+	"time"
+)
+
+// Why 32? See https://github.com/docker/docker/pull/8035.
+const defaultTimeout = 32 * time.Second
+
+// ConfigureTransport configures the specified Transport according to the
+// specified proto and addr.
+// If the proto is unix (using a unix socket to communicate) or npipe the
+// compression is disabled.
+func ConfigureTransport(tr *http.Transport, proto, addr string) error {
+	switch proto {
+	case "unix":
+		// No need for compression in local communications.
+		tr.DisableCompression = true
+		tr.Dial = func(_, _ string) (net.Conn, error) {
+			return net.DialTimeout(proto, addr, defaultTimeout)
+		}
+	case "npipe":
+		// No need for compression in local communications.
+		tr.DisableCompression = true
+		tr.Dial = func(_, _ string) (net.Conn, error) {
+			return DialPipe(addr, defaultTimeout)
+		}
+	default:
+		tr.Proxy = http.ProxyFromEnvironment
+		dialer, err := DialerFromEnvironment(&net.Dialer{
+			Timeout: defaultTimeout,
+		})
+		if err != nil {
+			return err
+		}
+		tr.Dial = dialer.Dial
+	}
+	return nil
+}

integration/vendor/github.com/docker/go-connections/sockets/sockets_unix.go

@@ -0,0 +1,15 @@
+// +build !windows
+
+package sockets
+
+import (
+	"net"
+	"syscall"
+	"time"
+)
+
+// DialPipe connects to a Windows named pipe.
+// This is not supported on other OSes.
+func DialPipe(_ string, _ time.Duration) (net.Conn, error) {
+	return nil, syscall.EAFNOSUPPORT
+}

integration/vendor/github.com/docker/go-connections/sockets/sockets_windows.go

@@ -0,0 +1,13 @@
+package sockets
+
+import (
+	"net"
+	"time"
+
+	"github.com/Microsoft/go-winio"
+)
+
+// DialPipe connects to a Windows named pipe.
+func DialPipe(addr string, timeout time.Duration) (net.Conn, error) {
+	return winio.DialPipe(addr, &timeout)
+}

integration/vendor/github.com/docker/go-connections/sockets/tcp_socket.go

@@ -0,0 +1,22 @@
+// Package sockets provides helper functions to create and configure Unix or TCP sockets.
+package sockets
+
+import (
+	"crypto/tls"
+	"net"
+)
+
+// NewTCPSocket creates a TCP socket listener with the specified address and
+// and the specified tls configuration. If TLSConfig is set, will encapsulate the
+// TCP listener inside a TLS one.
+func NewTCPSocket(addr string, tlsConfig *tls.Config) (net.Listener, error) {
+	l, err := net.Listen("tcp", addr)
+	if err != nil {
+		return nil, err
+	}
+	if tlsConfig != nil {
+		tlsConfig.NextProtos = []string{"http/1.1"}
+		l = tls.NewListener(l, tlsConfig)
+	}
+	return l, nil
+}

integration/vendor/github.com/docker/go-connections/sockets/unix_socket.go

@@ -0,0 +1,80 @@
+// +build linux freebsd solaris
+
+package sockets
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"strconv"
+	"syscall"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/opencontainers/runc/libcontainer/user"
+)
+
+// NewUnixSocket creates a unix socket with the specified path and group.
+func NewUnixSocket(path, group string) (net.Listener, error) {
+	if err := syscall.Unlink(path); err != nil && !os.IsNotExist(err) {
+		return nil, err
+	}
+	mask := syscall.Umask(0777)
+	defer syscall.Umask(mask)
+	l, err := net.Listen("unix", path)
+	if err != nil {
+		return nil, err
+	}
+	if err := setSocketGroup(path, group); err != nil {
+		l.Close()
+		return nil, err
+	}
+	if err := os.Chmod(path, 0660); err != nil {
+		l.Close()
+		return nil, err
+	}
+	return l, nil
+}
+
+func setSocketGroup(path, group string) error {
+	if group == "" {
+		return nil
+	}
+	if err := changeGroup(path, group); err != nil {
+		if group != "docker" {
+			return err
+		}
+		logrus.Debugf("Warning: could not change group %s to docker: %v", path, err)
+	}
+	return nil
+}
+
+func changeGroup(path string, nameOrGid string) error {
+	gid, err := lookupGidByName(nameOrGid)
+	if err != nil {
+		return err
+	}
+	logrus.Debugf("%s group found. gid: %d", nameOrGid, gid)
+	return os.Chown(path, 0, gid)
+}
+
+func lookupGidByName(nameOrGid string) (int, error) {
+	groupFile, err := user.GetGroupPath()
+	if err != nil {
+		return -1, err
+	}
+	groups, err := user.ParseGroupFileFilter(groupFile, func(g user.Group) bool {
+		return g.Name == nameOrGid || strconv.Itoa(g.Gid) == nameOrGid
+	})
+	if err != nil {
+		return -1, err
+	}
+	if groups != nil && len(groups) > 0 {
+		return groups[0].Gid, nil
+	}
+	gid, err := strconv.Atoi(nameOrGid)
+	if err == nil {
+		logrus.Warnf("Could not find GID %d", gid)
+		return gid, nil
+	}
+	return -1, fmt.Errorf("Group %s not found", nameOrGid)
+}

integration/vendor/github.com/docker/go-connections/tlsconfig/config.go

@@ -0,0 +1,126 @@
+// Package tlsconfig provides primitives to retrieve secure-enough TLS configurations for both clients and servers.
+//
+// As a reminder from https://golang.org/pkg/crypto/tls/#Config:
+//	A Config structure is used to configure a TLS client or server. After one has been passed to a TLS function it must not be modified.
+//	A Config may be reused; the tls package will also not modify it.
+package tlsconfig
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/Sirupsen/logrus"
+)
+
+// Options represents the information needed to create client and server TLS configurations.
+type Options struct {
+	CAFile string
+
+	// If either CertFile or KeyFile is empty, Client() will not load them
+	// preventing the client from authenticating to the server.
+	// However, Server() requires them and will error out if they are empty.
+	CertFile string
+	KeyFile  string
+
+	// client-only option
+	InsecureSkipVerify bool
+	// server-only option
+	ClientAuth tls.ClientAuthType
+}
+
+// Extra (server-side) accepted CBC cipher suites - will phase out in the future
+var acceptedCBCCiphers = []uint16{
+	tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
+	tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
+	tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
+	tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
+	tls.TLS_RSA_WITH_AES_256_CBC_SHA,
+	tls.TLS_RSA_WITH_AES_128_CBC_SHA,
+}
+
+// DefaultServerAcceptedCiphers should be uses by code which already has a crypto/tls
+// options struct but wants to use a commonly accepted set of TLS cipher suites, with
+// known weak algorithms removed.
+var DefaultServerAcceptedCiphers = append(clientCipherSuites, acceptedCBCCiphers...)
+
+// ServerDefault returns a secure-enough TLS configuration for the server TLS configuration.
+func ServerDefault() *tls.Config {
+	return &tls.Config{
+		// Avoid fallback to SSL protocols < TLS1.0
+		MinVersion:               tls.VersionTLS10,
+		PreferServerCipherSuites: true,
+		CipherSuites:             DefaultServerAcceptedCiphers,
+	}
+}
+
+// ClientDefault returns a secure-enough TLS configuration for the client TLS configuration.
+func ClientDefault() *tls.Config {
+	return &tls.Config{
+		// Prefer TLS1.2 as the client minimum
+		MinVersion:   tls.VersionTLS12,
+		CipherSuites: clientCipherSuites,
+	}
+}
+
+// certPool returns an X.509 certificate pool from `caFile`, the certificate file.
+func certPool(caFile string) (*x509.CertPool, error) {
+	// If we should verify the server, we need to load a trusted ca
+	certPool := x509.NewCertPool()
+	pem, err := ioutil.ReadFile(caFile)
+	if err != nil {
+		return nil, fmt.Errorf("Could not read CA certificate %q: %v", caFile, err)
+	}
+	if !certPool.AppendCertsFromPEM(pem) {
+		return nil, fmt.Errorf("failed to append certificates from PEM file: %q", caFile)
+	}
+	logrus.Debugf("Trusting %d certs", len(certPool.Subjects()))
+	return certPool, nil
+}
+
+// Client returns a TLS configuration meant to be used by a client.
+func Client(options Options) (*tls.Config, error) {
+	tlsConfig := ClientDefault()
+	tlsConfig.InsecureSkipVerify = options.InsecureSkipVerify
+	if !options.InsecureSkipVerify && options.CAFile != "" {
+		CAs, err := certPool(options.CAFile)
+		if err != nil {
+			return nil, err
+		}
+		tlsConfig.RootCAs = CAs
+	}
+
+	if options.CertFile != "" || options.KeyFile != "" {
+		tlsCert, err := tls.LoadX509KeyPair(options.CertFile, options.KeyFile)
+		if err != nil {
+			return nil, fmt.Errorf("Could not load X509 key pair: %v. Make sure the key is not encrypted", err)
+		}
+		tlsConfig.Certificates = []tls.Certificate{tlsCert}
+	}
+
+	return tlsConfig, nil
+}
+
+// Server returns a TLS configuration meant to be used by a server.
+func Server(options Options) (*tls.Config, error) {
+	tlsConfig := ServerDefault()
+	tlsConfig.ClientAuth = options.ClientAuth
+	tlsCert, err := tls.LoadX509KeyPair(options.CertFile, options.KeyFile)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil, fmt.Errorf("Could not load X509 key pair (cert: %q, key: %q): %v", options.CertFile, options.KeyFile, err)
+		}
+		return nil, fmt.Errorf("Error reading X509 key pair (cert: %q, key: %q): %v. Make sure the key is not encrypted.", options.CertFile, options.KeyFile, err)
+	}
+	tlsConfig.Certificates = []tls.Certificate{tlsCert}
+	if options.ClientAuth >= tls.VerifyClientCertIfGiven {
+		CAs, err := certPool(options.CAFile)
+		if err != nil {
+			return nil, err
+		}
+		tlsConfig.ClientCAs = CAs
+	}
+	return tlsConfig, nil
+}

integration/vendor/github.com/docker/go-connections/tlsconfig/config_client_ciphers.go

@@ -0,0 +1,17 @@
+// +build go1.5
+
+// Package tlsconfig provides primitives to retrieve secure-enough TLS configurations for both clients and servers.
+//
+package tlsconfig
+
+import (
+	"crypto/tls"
+)
+
+// Client TLS cipher suites (dropping CBC ciphers for client preferred suite set)
+var clientCipherSuites = []uint16{
+	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,
+	tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
+}

integration/vendor/github.com/docker/go-connections/tlsconfig/config_legacy_client_ciphers.go

@@ -0,0 +1,15 @@
+// +build !go1.5
+
+// Package tlsconfig provides primitives to retrieve secure-enough TLS configurations for both clients and servers.
+//
+package tlsconfig
+
+import (
+	"crypto/tls"
+)
+
+// Client TLS cipher suites (dropping CBC ciphers for client preferred suite set)
+var clientCipherSuites = []uint16{
+	tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
+	tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
+}