Add support for using v2 ping challenges for v1

Allows using v2 for v1 endpoints.
The primary use case being for search which does not have a v2 specification.
Added a user scope for allowing v2 search

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)

registry/client/auth/session.go

@@ -72,15 +72,19 @@ type endpointAuthorizer struct {
 }
 
 func (ea *endpointAuthorizer) ModifyRequest(req *http.Request) error {
-	v2Root := strings.Index(req.URL.Path, "/v2/")
-	if v2Root == -1 {
+	pingPath := req.URL.Path
+	if v2Root := strings.Index(req.URL.Path, "/v2/"); v2Root != -1 {
+		pingPath = pingPath[:v2Root+4]
+	} else if v1Root := strings.Index(req.URL.Path, "/v1/"); v1Root != -1 {
+		pingPath = pingPath[:v1Root] + "/v2/"
+	} else {
 		return nil
 	}
 
 	ping := url.URL{
 		Host:   req.URL.Host,
 		Scheme: req.URL.Scheme,
-		Path:   req.URL.Path[:v2Root+4],
+		Path:   pingPath,
 	}
 
 	challenges, err := ea.challenges.GetChallenges(ping)
@@ -151,6 +155,19 @@ func (rs RepositoryScope) String() string {
 	return fmt.Sprintf("repository:%s:%s", rs.Repository, strings.Join(rs.Actions, ","))
 }
 
+// RegistryScope represents a token scope for access
+// to resources in the registry.
+type RegistryScope struct {
+	Name    string
+	Actions []string
+}
+
+// String returns the string representation of the user
+// using the scope grammar
+func (rs RegistryScope) String() string {
+	return fmt.Sprintf("registry:%s:%s", rs.Name, strings.Join(rs.Actions, ","))
+}
+
 // TokenHandlerOptions is used to configure a new token handler
 type TokenHandlerOptions struct {
 	Transport   http.RoundTripper

registry/client/auth/session_test.go

@@ -362,6 +362,84 @@ func TestEndpointAuthorizeRefreshToken(t *testing.T) {
 	}
 }
 
+func TestEndpointAuthorizeV2RefreshToken(t *testing.T) {
+	service := "localhost.localdomain"
+	scope1 := "registry:catalog:search"
+	refreshToken1 := "0123456790abcdef"
+	tokenMap := testutil.RequestResponseMap([]testutil.RequestResponseMapping{
+		{
+			Request: testutil.Request{
+				Method: "POST",
+				Route:  "/token",
+				Body:   []byte(fmt.Sprintf("client_id=registry-client&grant_type=refresh_token&refresh_token=%s&scope=%s&service=%s", refreshToken1, url.QueryEscape(scope1), service)),
+			},
+			Response: testutil.Response{
+				StatusCode: http.StatusOK,
+				Body:       []byte(fmt.Sprintf(`{"access_token":"statictoken","refresh_token":"%s"}`, refreshToken1)),
+			},
+		},
+	})
+	te, tc := testServer(tokenMap)
+	defer tc()
+
+	m := testutil.RequestResponseMap([]testutil.RequestResponseMapping{
+		{
+			Request: testutil.Request{
+				Method: "GET",
+				Route:  "/v1/search",
+			},
+			Response: testutil.Response{
+				StatusCode: http.StatusAccepted,
+			},
+		},
+	})
+
+	authenicate := fmt.Sprintf("Bearer realm=%q,service=%q", te+"/token", service)
+	validCheck := func(a string) bool {
+		return a == "Bearer statictoken"
+	}
+	e, c := testServerWithAuth(m, authenicate, validCheck)
+	defer c()
+
+	challengeManager1 := NewSimpleChallengeManager()
+	versions, err := ping(challengeManager1, e+"/v2/", "x-api-version")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(versions) != 1 {
+		t.Fatalf("Unexpected version count: %d, expected 1", len(versions))
+	}
+	if check := (APIVersion{Type: "registry", Version: "2.0"}); versions[0] != check {
+		t.Fatalf("Unexpected api version: %#v, expected %#v", versions[0], check)
+	}
+	tho := TokenHandlerOptions{
+		Credentials: &testCredentialStore{
+			refreshTokens: map[string]string{
+				service: refreshToken1,
+			},
+		},
+		Scopes: []Scope{
+			RegistryScope{
+				Name:    "catalog",
+				Actions: []string{"search"},
+			},
+		},
+	}
+
+	transport1 := transport.NewTransport(nil, NewAuthorizer(challengeManager1, NewTokenHandlerWithOptions(tho)))
+	client := &http.Client{Transport: transport1}
+
+	req, _ := http.NewRequest("GET", e+"/v1/search", nil)
+	resp, err := client.Do(req)
+	if err != nil {
+		t.Fatalf("Error sending get request: %s", err)
+	}
+
+	if resp.StatusCode != http.StatusAccepted {
+		t.Fatalf("Unexpected status code: %d, expected %d", resp.StatusCode, http.StatusAccepted)
+	}
+}
+
 func basicAuth(username, password string) string {
 	auth := username + ":" + password
 	return base64.StdEncoding.EncodeToString([]byte(auth))