vendoring dependencies

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

@@ -0,0 +1,89 @@
+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)
+}
+
+// timeoutError is used when there is a timeout with a connection
+// this implements the net.Error interface
+type timeoutError struct{}
+
+func (e *timeoutError) Error() string   { return "i/o timeout" }
+func (e *timeoutError) Timeout() bool   { return true }
+func (e *timeoutError) Temporary() bool { return true }

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
+}

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
+}

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
+}

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)
+}

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
+}

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)
+}

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

@@ -0,0 +1,122 @@
+// 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 is a secure-enough TLS configuration for the server TLS configuration.
+var ServerDefault = tls.Config{
+	// Avoid fallback to SSL protocols < TLS1.0
+	MinVersion:               tls.VersionTLS10,
+	PreferServerCipherSuites: true,
+	CipherSuites:             DefaultServerAcceptedCiphers,
+}
+
+// ClientDefault is a secure-enough TLS configuration for the client TLS configuration.
+var ClientDefault = 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
+}

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,
+}

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,
+}