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registry.go
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registry.go
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package registry
import (
"crypto/tls"
"crypto/x509"
"errors"
"fmt"
"io/ioutil"
"net"
"net/http"
"os"
"path"
"strings"
"time"
log "github.com/Sirupsen/logrus"
"github.com/docker/docker/pkg/timeoutconn"
)
var (
ErrAlreadyExists = errors.New("Image already exists")
ErrDoesNotExist = errors.New("Image does not exist")
errLoginRequired = errors.New("Authentication is required.")
)
type TimeoutType uint32
const (
NoTimeout TimeoutType = iota
ReceiveTimeout
ConnectTimeout
)
func newClient(jar http.CookieJar, roots *x509.CertPool, certs []tls.Certificate, timeout TimeoutType, secure bool) *http.Client {
tlsConfig := tls.Config{
RootCAs: roots,
// Avoid fallback to SSL protocols < TLS1.0
MinVersion: tls.VersionTLS10,
Certificates: certs,
}
if !secure {
tlsConfig.InsecureSkipVerify = true
}
httpTransport := &http.Transport{
DisableKeepAlives: true,
Proxy: http.ProxyFromEnvironment,
TLSClientConfig: &tlsConfig,
}
switch timeout {
case ConnectTimeout:
httpTransport.Dial = func(proto string, addr string) (net.Conn, error) {
// Set the connect timeout to 5 seconds
d := net.Dialer{Timeout: 5 * time.Second, DualStack: true}
conn, err := d.Dial(proto, addr)
if err != nil {
return nil, err
}
// Set the recv timeout to 10 seconds
conn.SetDeadline(time.Now().Add(10 * time.Second))
return conn, nil
}
case ReceiveTimeout:
httpTransport.Dial = func(proto string, addr string) (net.Conn, error) {
d := net.Dialer{DualStack: true}
conn, err := d.Dial(proto, addr)
if err != nil {
return nil, err
}
conn = timeoutconn.New(conn, 1*time.Minute)
return conn, nil
}
}
return &http.Client{
Transport: httpTransport,
CheckRedirect: AddRequiredHeadersToRedirectedRequests,
Jar: jar,
}
}
func doRequest(req *http.Request, jar http.CookieJar, timeout TimeoutType, secure bool) (*http.Response, *http.Client, error) {
var (
pool *x509.CertPool
certs []tls.Certificate
)
if secure && req.URL.Scheme == "https" {
hasFile := func(files []os.FileInfo, name string) bool {
for _, f := range files {
if f.Name() == name {
return true
}
}
return false
}
hostDir := path.Join("/etc/docker/certs.d", req.URL.Host)
log.Debugf("hostDir: %s", hostDir)
fs, err := ioutil.ReadDir(hostDir)
if err != nil && !os.IsNotExist(err) {
return nil, nil, err
}
for _, f := range fs {
if strings.HasSuffix(f.Name(), ".crt") {
if pool == nil {
pool = x509.NewCertPool()
}
log.Debugf("crt: %s", hostDir+"/"+f.Name())
data, err := ioutil.ReadFile(path.Join(hostDir, f.Name()))
if err != nil {
return nil, nil, err
}
pool.AppendCertsFromPEM(data)
}
if strings.HasSuffix(f.Name(), ".cert") {
certName := f.Name()
keyName := certName[:len(certName)-5] + ".key"
log.Debugf("cert: %s", hostDir+"/"+f.Name())
if !hasFile(fs, keyName) {
return nil, nil, fmt.Errorf("Missing key %s for certificate %s", keyName, certName)
}
cert, err := tls.LoadX509KeyPair(path.Join(hostDir, certName), path.Join(hostDir, keyName))
if err != nil {
return nil, nil, err
}
certs = append(certs, cert)
}
if strings.HasSuffix(f.Name(), ".key") {
keyName := f.Name()
certName := keyName[:len(keyName)-4] + ".cert"
log.Debugf("key: %s", hostDir+"/"+f.Name())
if !hasFile(fs, certName) {
return nil, nil, fmt.Errorf("Missing certificate %s for key %s", certName, keyName)
}
}
}
}
if len(certs) == 0 {
client := newClient(jar, pool, nil, timeout, secure)
res, err := client.Do(req)
if err != nil {
return nil, nil, err
}
return res, client, nil
}
client := newClient(jar, pool, certs, timeout, secure)
res, err := client.Do(req)
return res, client, err
}
func trustedLocation(req *http.Request) bool {
var (
trusteds = []string{"docker.com", "docker.io"}
hostname = strings.SplitN(req.Host, ":", 2)[0]
)
if req.URL.Scheme != "https" {
return false
}
for _, trusted := range trusteds {
if hostname == trusted || strings.HasSuffix(hostname, "."+trusted) {
return true
}
}
return false
}
func AddRequiredHeadersToRedirectedRequests(req *http.Request, via []*http.Request) error {
if via != nil && via[0] != nil {
if trustedLocation(req) && trustedLocation(via[0]) {
req.Header = via[0].Header
return nil
}
for k, v := range via[0].Header {
if k != "Authorization" {
for _, vv := range v {
req.Header.Add(k, vv)
}
}
}
}
return nil
}