SPDY roundtripper support to proxy with Basic auth

pkg/util/httpstream/spdy/roundtripper.go

@@ -19,6 +19,7 @@ package spdy
 import (
 	"bufio"
 	"crypto/tls"
+	"encoding/base64"
 	"fmt"
 	"io/ioutil"
 	"net"
@@ -97,6 +98,11 @@ func (s *SpdyRoundTripper) dial(req *http.Request) (net.Conn, error) {
 		Host:   targetHost,
 	}
 
+	if pa := s.proxyAuth(proxyURL); pa != "" {
+		proxyReq.Header = http.Header{}
+		proxyReq.Header.Set("Proxy-Authorization", pa)
+	}
+
 	proxyDialConn, err := s.dialWithoutProxy(proxyURL)
 	if err != nil {
 		return nil, err
@@ -183,6 +189,16 @@ func (s *SpdyRoundTripper) dialWithoutProxy(url *url.URL) (net.Conn, error) {
 	return conn, nil
 }
 
+// proxyAuth returns, for a given proxy URL, the value to be used for the Proxy-Authorization header
+func (s *SpdyRoundTripper) proxyAuth(proxyURL *url.URL) string {
+	if proxyURL == nil || proxyURL.User == nil {
+		return ""
+	}
+	credentials := proxyURL.User.String()
+	encodedAuth := base64.StdEncoding.EncodeToString([]byte(credentials))
+	return fmt.Sprintf("Basic %s", encodedAuth)
+}
+
 // RoundTrip executes the Request and upgrades it. After a successful upgrade,
 // clients may call SpdyRoundTripper.Connection() to retrieve the upgraded
 // connection.

pkg/util/httpstream/spdy/roundtripper_test.go

@@ -19,6 +19,7 @@ package spdy
 import (
 	"crypto/tls"
 	"crypto/x509"
+	"encoding/base64"
 	"io"
 	"net/http"
 	"net/http/httptest"
@@ -64,6 +65,7 @@ func TestRoundTripAndNewConnection(t *testing.T) {
 	testCases := map[string]struct {
 		serverFunc             func(http.Handler) *httptest.Server
 		proxyServerFunc        func(http.Handler) *httptest.Server
+		proxyAuth              *url.Userinfo
 		clientTLS              *tls.Config
 		serverConnectionHeader string
 		serverUpgradeHeader    string
@@ -146,6 +148,16 @@ func TestRoundTripAndNewConnection(t *testing.T) {
 			serverStatusCode:       http.StatusSwitchingProtocols,
 			shouldError:            false,
 		},
+		"proxied https with auth (invalid hostname + InsecureSkipVerify) -> http": {
+			serverFunc:             httptest.NewServer,
+			proxyServerFunc:        httpsServerInvalidHostname,
+			proxyAuth:              url.UserPassword("proxyuser", "proxypasswd"),
+			clientTLS:              &tls.Config{InsecureSkipVerify: true},
+			serverConnectionHeader: "Upgrade",
+			serverUpgradeHeader:    "SPDY/3.1",
+			serverStatusCode:       http.StatusSwitchingProtocols,
+			shouldError:            false,
+		},
 		"proxied https (invalid hostname + hostname verification) -> http": {
 			serverFunc:             httptest.NewServer,
 			proxyServerFunc:        httpsServerInvalidHostname,
@@ -164,6 +176,16 @@ func TestRoundTripAndNewConnection(t *testing.T) {
 			serverStatusCode:       http.StatusSwitchingProtocols,
 			shouldError:            false,
 		},
+		"proxied https with auth (valid hostname + RootCAs) -> http": {
+			serverFunc:             httptest.NewServer,
+			proxyServerFunc:        httpsServerValidHostname,
+			proxyAuth:              url.UserPassword("proxyuser", "proxypasswd"),
+			clientTLS:              &tls.Config{RootCAs: localhostPool},
+			serverConnectionHeader: "Upgrade",
+			serverUpgradeHeader:    "SPDY/3.1",
+			serverStatusCode:       http.StatusSwitchingProtocols,
+			shouldError:            false,
+		},
 		"proxied https (invalid hostname + InsecureSkipVerify) -> https (invalid hostname)": {
 			serverFunc:             httpsServerInvalidHostname,
 			proxyServerFunc:        httpsServerInvalidHostname,
@@ -173,6 +195,16 @@ func TestRoundTripAndNewConnection(t *testing.T) {
 			serverStatusCode:       http.StatusSwitchingProtocols,
 			shouldError:            false, // works because the test proxy ignores TLS errors
 		},
+		"proxied https with auth (invalid hostname + InsecureSkipVerify) -> https (invalid hostname)": {
+			serverFunc:             httpsServerInvalidHostname,
+			proxyServerFunc:        httpsServerInvalidHostname,
+			proxyAuth:              url.UserPassword("proxyuser", "proxypasswd"),
+			clientTLS:              &tls.Config{InsecureSkipVerify: true},
+			serverConnectionHeader: "Upgrade",
+			serverUpgradeHeader:    "SPDY/3.1",
+			serverStatusCode:       http.StatusSwitchingProtocols,
+			shouldError:            false, // works because the test proxy ignores TLS errors
+		},
 		"proxied https (invalid hostname + hostname verification) -> https (invalid hostname)": {
 			serverFunc:             httpsServerInvalidHostname,
 			proxyServerFunc:        httpsServerInvalidHostname,
@@ -191,6 +223,16 @@ func TestRoundTripAndNewConnection(t *testing.T) {
 			serverStatusCode:       http.StatusSwitchingProtocols,
 			shouldError:            false,
 		},
+		"proxied https with auth (valid hostname + RootCAs) -> https (valid hostname + RootCAs)": {
+			serverFunc:             httpsServerValidHostname,
+			proxyServerFunc:        httpsServerValidHostname,
+			proxyAuth:              url.UserPassword("proxyuser", "proxypasswd"),
+			clientTLS:              &tls.Config{RootCAs: localhostPool},
+			serverConnectionHeader: "Upgrade",
+			serverUpgradeHeader:    "SPDY/3.1",
+			serverStatusCode:       http.StatusSwitchingProtocols,
+			shouldError:            false,
+		},
 	}
 
 	for k, testCase := range testCases {
@@ -238,20 +280,29 @@ func TestRoundTripAndNewConnection(t *testing.T) {
 
 		var proxierCalled bool
 		var proxyCalledWithHost string
+		var proxyCalledWithAuth bool
+		var proxyCalledWithAuthHeader string
 		if testCase.proxyServerFunc != nil {
 			proxyHandler := goproxy.NewProxyHttpServer()
+
 			proxyHandler.OnRequest().HandleConnectFunc(func(host string, ctx *goproxy.ProxyCtx) (*goproxy.ConnectAction, string) {
 				proxyCalledWithHost = host
+
+				proxyAuthHeaderName := "Proxy-Authorization"
+				_, proxyCalledWithAuth = ctx.Req.Header[proxyAuthHeaderName]
+				proxyCalledWithAuthHeader = ctx.Req.Header.Get(proxyAuthHeaderName)
 				return goproxy.OkConnect, host
 			})
+
 			proxy := testCase.proxyServerFunc(proxyHandler)
 
 			spdyTransport.proxier = func(proxierReq *http.Request) (*url.URL, error) {
+				proxierCalled = true
 				proxyURL, err := url.Parse(proxy.URL)
 				if err != nil {
 					return nil, err
 				}
-				proxierCalled = true
+				proxyURL.User = testCase.proxyAuth
 				return proxyURL, nil
 			}
 			// TODO: Uncomment when fix #19254
@@ -311,6 +362,18 @@ func TestRoundTripAndNewConnection(t *testing.T) {
 				t.Fatalf("%s: Expected to see a call to the proxy for backend %q, got %q", k, serverURL.Host, proxyCalledWithHost)
 			}
 		}
+
+		var expectedProxyAuth string
+		if testCase.proxyAuth != nil {
+			encodedCredentials := base64.StdEncoding.EncodeToString([]byte(testCase.proxyAuth.String()))
+			expectedProxyAuth = "Basic " + encodedCredentials
+		}
+		if len(expectedProxyAuth) == 0 && proxyCalledWithAuth {
+			t.Fatalf("%s: Proxy authorization unexpected, got %q", k, proxyCalledWithAuthHeader)
+		}
+		if proxyCalledWithAuthHeader != expectedProxyAuth {
+			t.Fatalf("%s: Expected to see a call to the proxy with credentials %q, got %q", k, testCase.proxyAuth, proxyCalledWithAuthHeader)
+		}
 	}
 }