Add configuration "case sensitive" to HTTP auth proxy

This commit make case sensitivity configurable when the authentication
backend is auth proxy.
When the "http_authproxy_case_sensitive" is set to false, the name of
user/group will be converted to lower-case when onboarded to Harbor, so
as long as the authentication is successful there's no difference regardless
upper or lower case is used.  It will be mapped to one entry in Harbor's
User/Group table.
Similar to auth_mode, there is limitation that once there are users
onboarded to Harbor's DB this attribute is not configurable.

Signed-off-by: Daniel Jiang <jiangd@vmware.com>

src/common/config/metadata/metadatalist.go

@@ -139,6 +139,7 @@ var (
 		{Name: common.HTTPAuthProxyTokenReviewEndpoint, Scope: UserScope, Group: HTTPAuthGroup, ItemType: &StringType{}},
 		{Name: common.HTTPAuthProxyVerifyCert, Scope: UserScope, Group: HTTPAuthGroup, DefaultValue: "true", ItemType: &BoolType{}},
 		{Name: common.HTTPAuthProxySkipSearch, Scope: UserScope, Group: HTTPAuthGroup, DefaultValue: "false", ItemType: &BoolType{}},
+		{Name: common.HTTPAuthProxyCaseSensitive, Scope: UserScope, Group: HTTPAuthGroup, DefaultValue: "true", ItemType: &BoolType{}},
 
 		{Name: common.OIDCName, Scope: UserScope, Group: OIDCGroup, ItemType: &StringType{}},
 		{Name: common.OIDCEndpoint, Scope: UserScope, Group: OIDCGroup, ItemType: &StringType{}},

src/common/const.go

@@ -105,6 +105,7 @@ const (
 	HTTPAuthProxyTokenReviewEndpoint = "http_authproxy_tokenreview_endpoint"
 	HTTPAuthProxyVerifyCert          = "http_authproxy_verify_cert"
 	HTTPAuthProxySkipSearch          = "http_authproxy_skip_search"
+	HTTPAuthProxyCaseSensitive       = "http_authproxy_case_sensitive"
 	OIDCName                         = "oidc_name"
 	OIDCEndpoint                     = "oidc_endpoint"
 	OIDCCLientID                     = "oidc_client_id"

src/common/models/config.go

@@ -73,6 +73,7 @@ type HTTPAuthProxy struct {
 	TokenReviewEndpoint string `json:"tokenreivew_endpoint"`
 	VerifyCert          bool   `json:"verify_cert"`
 	SkipSearch          bool   `json:"skip_search"`
+	CaseSensitive       bool   `json:"case_sensitive"`
 }
 
 // OIDCSetting wraps the settings for OIDC auth endpoint

src/core/api/config.go

@@ -121,21 +121,32 @@ func (c *ConfigAPI) Put() {
 }
 
 func (c *ConfigAPI) validateCfg(cfgs map[string]interface{}) (bool, error) {
-	mode := c.cfgManager.Get(common.AUTHMode).GetString()
-	if value, ok := cfgs[common.AUTHMode]; ok {
 	flag, err := authModeCanBeModified()
 	if err != nil {
 		return true, err
 	}
-		if mode != fmt.Sprintf("%v", value) && !flag {
+	if !flag {
-			return false, fmt.Errorf("%s can not be modified as new users have been inserted into database", common.AUTHMode)
+		if failedKeys := checkUnmodifiable(c.cfgManager, cfgs, common.AUTHMode, common.HTTPAuthProxyCaseSensitive); len(failedKeys) > 0 {
+			return false, fmt.Errorf("the keys %v can not be modified as new users have been inserted into database", failedKeys)
 		}
 	}
-	err := c.cfgManager.ValidateCfg(cfgs)
+	err = c.cfgManager.ValidateCfg(cfgs)
-	if err != nil {
 	return false, err
 }
-	return false, nil
+
+func checkUnmodifiable(mgr *config.CfgManager, cfgs map[string]interface{}, keys ...string) (failed []string) {
+	if mgr == nil || cfgs == nil || keys == nil {
+		return
+	}
+	for _, k := range keys {
+		v := mgr.Get(k).GetString()
+		if nv, ok := cfgs[k]; ok {
+			if v != fmt.Sprintf("%v", nv) {
+				failed = append(failed, k)
+			}
+		}
+	}
+	return
 }
 
 // delete sensitive attrs and add editable field to every attr

src/core/auth/authproxy/auth.go

@@ -40,11 +40,14 @@ import (
 const refreshDuration = 2 * time.Second
 const userEntryComment = "By Authproxy"
 
-var secureTransport = &http.Transport{}
+var secureTransport = &http.Transport{
+	Proxy: http.ProxyFromEnvironment,
+}
 var insecureTransport = &http.Transport{
 	TLSClientConfig: &tls.Config{
 		InsecureSkipVerify: true,
 	},
+	Proxy: http.ProxyFromEnvironment,
 }
 
 // Auth implements HTTP authenticator the required attributes.
@@ -56,6 +59,10 @@ type Auth struct {
 	TokenReviewEndpoint string
 	SkipCertVerify      bool
 	SkipSearch          bool
+	// When this attribute is set to false, the name of user/group will be converted to lower-case when onboarded to Harbor, so
+	// as long as the authentication is successful there's no difference in terms of upper or lower case that is used.
+	// It will be mapped to one entry in Harbor's User/Group table.
+	CaseSensitive    bool
 	settingTimeStamp time.Time
 	client           *http.Client
 }
@@ -84,7 +91,8 @@ func (a *Auth) Authenticate(m models.AuthModel) (*models.User, error) {
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode == http.StatusOK {
-		user := &models.User{Username: m.Principal}
+		name := a.normalizeName(m.Principal)
+		user := &models.User{Username: name}
 		data, err := ioutil.ReadAll(resp.Body)
 		if err != nil {
 			log.Warningf("Failed to read response body, error: %v", err)
@@ -141,6 +149,7 @@ func (a *Auth) tokenReview(sessionID string) (*k8s_api_v1beta1.TokenReview, erro
 
 // OnBoardUser delegates to dao pkg to insert/update data in DB.
 func (a *Auth) OnBoardUser(u *models.User) error {
+	u.Username = a.normalizeName(u.Username)
 	return dao.OnBoardUser(u)
 }
 
@@ -156,12 +165,14 @@ func (a *Auth) PostAuthenticate(u *models.User) error {
 }
 
 // SearchUser returns nil as authproxy does not have such capability.
-// When SkipSearch is set it always return the default model.
+// When SkipSearch is set it always return the default model,
+// the username will be switch to lowercase if it's configured as case-insensitive
 func (a *Auth) SearchUser(username string) (*models.User, error) {
 	err := a.ensure()
 	if err != nil {
 		log.Warningf("Failed to refresh configuration for HTTP Auth Proxy Authenticator, error: %v, the default settings will be used", err)
 	}
+	username = a.normalizeName(username)
 	var u *models.User
 	if a.SkipSearch {
 		u = &models.User{Username: username}
@@ -178,6 +189,7 @@ func (a *Auth) SearchGroup(groupKey string) (*models.UserGroup, error) {
 	if err != nil {
 		log.Warningf("Failed to refresh configuration for HTTP Auth Proxy Authenticator, error: %v, the default settings will be used", err)
 	}
+	groupKey = a.normalizeName(groupKey)
 	var ug *models.UserGroup
 	if a.SkipSearch {
 		ug = &models.UserGroup{
@@ -196,6 +208,7 @@ func (a *Auth) OnBoardGroup(u *models.UserGroup, altGroupName string) error {
 		return errors.New("Should provide a group name")
 	}
 	u.GroupType = common.HTTPGroupType
+	u.GroupName = a.normalizeName(u.GroupName)
 	err := group.OnBoardUserGroup(u)
 	if err != nil {
 		return err
@@ -241,6 +254,13 @@ func (a *Auth) ensure() error {
 	return nil
 }
 
+func (a *Auth) normalizeName(n string) string {
+	if !a.CaseSensitive {
+		return strings.ToLower(n)
+	}
+	return n
+}
+
 func init() {
 	auth.Register(common.HTTPAuth, &Auth{})
 }

src/core/auth/authproxy/auth_test.go

@@ -43,11 +43,11 @@ func TestMain(m *testing.M) {
 	}
 	mockSvr = test.NewMockServer(map[string]string{"jt": "pp", "Admin@vsphere.local": "Admin!23"})
 	defer mockSvr.Close()
-	defer dao.ExecuteBatchSQL([]string{"delete from user_group where group_name='OnBoardTest'"})
 	a = &Auth{
 		Endpoint:            mockSvr.URL + "/test/login",
 		TokenReviewEndpoint: mockSvr.URL + "/test/tokenreview",
 		SkipCertVerify:      true,
+		CaseSensitive:       false,
 		// So it won't require mocking the cfgManager
 		settingTimeStamp: time.Now(),
 	}
@@ -56,6 +56,7 @@ func TestMain(m *testing.M) {
 		common.HTTPAuthProxyEndpoint:            a.Endpoint,
 		common.HTTPAuthProxyTokenReviewEndpoint: a.TokenReviewEndpoint,
 		common.HTTPAuthProxyVerifyCert:          !a.SkipCertVerify,
+		common.HTTPAuthProxyCaseSensitive:       a.CaseSensitive,
 		common.PostGreSQLSSLMode:                cfgMap[common.PostGreSQLSSLMode],
 		common.PostGreSQLUsername:               cfgMap[common.PostGreSQLUsername],
 		common.PostGreSQLPort:                   cfgMap[common.PostGreSQLPort],
@@ -65,6 +66,7 @@ func TestMain(m *testing.M) {
 	}
 
 	config.InitWithSettings(conf)
+	defer dao.ExecuteBatchSQL([]string{"delete from user_group where group_name='onboardtest'"})
 	rc := m.Run()
 	if err := dao.ClearHTTPAuthProxyUsers(); err != nil {
 		panic(err)
@@ -117,7 +119,7 @@ func TestAuth_Authenticate(t *testing.T) {
 			},
 			expect: output{
 				user: models.User{
-					Username: "Admin@vsphere.local",
+					Username: "admin@vsphere.local",
 					GroupIDs: groupIDs,
 					// Email:    "Admin@placeholder.com",
 					// Password: pwd,
@@ -172,12 +174,12 @@ func TestAuth_PostAuthenticate(t *testing.T) {
 		},
 		{
 			input: &models.User{
-				Username: "Admin@vsphere.local",
+				Username: "admin@vsphere.local",
 			},
 			expect: models.User{
-				Username: "Admin@vsphere.local",
+				Username: "admin@vsphere.local",
-				Email:    "Admin@vsphere.local",
+				Email:    "admin@vsphere.local",
-				Realname: "Admin@vsphere.local",
+				Realname: "admin@vsphere.local",
 				Password: pwd,
 				Comment:  userEntryComment,
 			},
@@ -201,6 +203,9 @@ func TestAuth_OnBoardGroup(t *testing.T) {
 	a.OnBoardGroup(input, "")
 
 	assert.True(t, input.ID > 0, "The OnBoardGroup should have a valid group ID")
+	g, er := group.GetUserGroup(input.ID)
+	assert.Nil(t, er)
+	assert.Equal(t, "onboardtest", g.GroupName)
 
 	emptyGroup := &models.UserGroup{}
 	err := a.OnBoardGroup(emptyGroup, "")

src/core/config/config.go

@@ -475,8 +475,8 @@ func HTTPAuthProxySetting() (*models.HTTPAuthProxy, error) {
 		TokenReviewEndpoint: cfgMgr.Get(common.HTTPAuthProxyTokenReviewEndpoint).GetString(),
 		VerifyCert:          cfgMgr.Get(common.HTTPAuthProxyVerifyCert).GetBool(),
 		SkipSearch:          cfgMgr.Get(common.HTTPAuthProxySkipSearch).GetBool(),
+		CaseSensitive:       cfgMgr.Get(common.HTTPAuthProxyCaseSensitive).GetBool(),
 	}, nil
-
 }
 
 // OIDCSetting returns the setting of OIDC provider, currently there's only one OIDC provider allowed for Harbor and it's

src/core/config/config_test.go

@@ -219,6 +219,7 @@ func TestHTTPAuthProxySetting(t *testing.T) {
 	m := map[string]interface{}{
 		common.HTTPAuthProxySkipSearch:    "true",
 		common.HTTPAuthProxyVerifyCert:    "true",
+		common.HTTPAuthProxyCaseSensitive: "false",
 		common.HTTPAuthProxyEndpoint:      "https://auth.proxy/suffix",
 	}
 	InitWithSettings(m)
@@ -228,6 +229,7 @@ func TestHTTPAuthProxySetting(t *testing.T) {
 		Endpoint:      "https://auth.proxy/suffix",
 		SkipSearch:    true,
 		VerifyCert:    true,
+		CaseSensitive: false,
 	})
 }
 

src/core/filter/security_test.go

@@ -257,6 +257,7 @@ func TestAuthProxyReqCtxModifier(t *testing.T) {
 		Endpoint:            "https://auth.proxy/suffix",
 		SkipSearch:          true,
 		VerifyCert:          false,
+		CaseSensitive:       true,
 		TokenReviewEndpoint: server.URL,
 	})