Update dependencies

vendor/github.com/docker/libtrust/README.md

@@ -1,5 +1,9 @@
 # libtrust
 
+> **WARNING** this library is no longer actively developed, and will be integrated
+> in the [docker/distribution][https://www.github.com/docker/distribution]
+> repository in future.
+
 Libtrust is library for managing authentication and authorization using public key cryptography.
 
 Authentication is handled using the identity attached to the public key.

vendor/github.com/docker/libtrust/util.go

@@ -152,7 +152,7 @@ func NewIdentityAuthTLSClientConfig(dockerUrl string, trustUnknownHosts bool, ro
 }
 
 // joseBase64UrlEncode encodes the given data using the standard base64 url
-// encoding format but with all trailing '=' characters ommitted in accordance
+// encoding format but with all trailing '=' characters omitted in accordance
 // with the jose specification.
 // http://tools.ietf.org/html/draft-ietf-jose-json-web-signature-31#section-2
 func joseBase64UrlEncode(b []byte) string {
@@ -164,6 +164,8 @@ func joseBase64UrlEncode(b []byte) string {
 // accordance with the jose specification.
 // http://tools.ietf.org/html/draft-ietf-jose-json-web-signature-31#section-2
 func joseBase64UrlDecode(s string) ([]byte, error) {
+	s = strings.Replace(s, "\n", "", -1)
+	s = strings.Replace(s, " ", "", -1)
 	switch len(s) % 4 {
 	case 0:
 	case 2:

vendor/github.com/docker/libtrust/util_test.go

@@ -21,3 +21,25 @@ func TestAddPEMHeadersToKey(t *testing.T) {
 		t.Errorf("hosts(%v), expected %v", hosts, expected)
 	}
 }
+
+func TestBase64URL(t *testing.T) {
+	clean := "eyJhbGciOiJQQkVTMi1IUzI1NitBMTI4S1ciLCJwMnMiOiIyV0NUY0paMVJ2ZF9DSnVKcmlwUTF3IiwicDJjIjo0MDk2LCJlbmMiOiJBMTI4Q0JDLUhTMjU2IiwiY3R5IjoiandrK2pzb24ifQ"
+
+	tests := []string{
+		clean, // clean roundtrip
+		"eyJhbGciOiJQQkVTMi1IUzI1NitBMTI4S1ciLCJwMnMiOiIyV0NUY0paMVJ2\nZF9DSnVKcmlwUTF3IiwicDJjIjo0MDk2LCJlbmMiOiJBMTI4Q0JDLUhTMjU2\nIiwiY3R5IjoiandrK2pzb24ifQ",     // with newlines
+		"eyJhbGciOiJQQkVTMi1IUzI1NitBMTI4S1ciLCJwMnMiOiIyV0NUY0paMVJ2 \n ZF9DSnVKcmlwUTF3IiwicDJjIjo0MDk2LCJlbmMiOiJBMTI4Q0JDLUhTMjU2 \n IiwiY3R5IjoiandrK2pzb24ifQ", // with newlines and spaces
+	}
+
+	for i, test := range tests {
+		b, err := joseBase64UrlDecode(test)
+		if err != nil {
+			t.Fatalf("on test %d: %s", i, err)
+		}
+		got := joseBase64UrlEncode(b)
+
+		if got != clean {
+			t.Errorf("expected %q, got %q", clean, got)
+		}
+	}
+}