feat(authentication): use the passwordmodify exop for pwd resets with ldap (#2124)

Implement the LDAP password modify extended operation for LDAP providers that advertise they support it.

internal/authentication/ldap_connection_factory.go

@@ -15,6 +15,7 @@ type LDAPConnection interface {
 
 	Search(searchRequest *ldap.SearchRequest) (*ldap.SearchResult, error)
 	Modify(modifyRequest *ldap.ModifyRequest) error
+	PasswordModify(pwdModifyRequest *ldap.PasswordModifyRequest) error
 	StartTLS(config *tls.Config) error
 }
 
@@ -48,6 +49,12 @@ func (lc *LDAPConnectionImpl) Modify(modifyRequest *ldap.ModifyRequest) error {
 	return lc.conn.Modify(modifyRequest)
 }
 
+// PasswordModify modifies an ldap objects password.
+func (lc *LDAPConnectionImpl) PasswordModify(pwdModifyRequest *ldap.PasswordModifyRequest) error {
+	_, err := lc.conn.PasswordModify(pwdModifyRequest)
+	return err
+}
+
 // StartTLS requests the LDAP server upgrades to TLS encryption.
 func (lc *LDAPConnectionImpl) StartTLS(config *tls.Config) error {
 	return lc.conn.StartTLS(config)

internal/authentication/ldap_connection_factory_mock.go

@@ -88,6 +88,20 @@ func (mr *MockLDAPConnectionMockRecorder) Modify(modifyRequest interface{}) *gom
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Modify", reflect.TypeOf((*MockLDAPConnection)(nil).Modify), modifyRequest)
 }
 
+// PasswordModify mocks base method
+func (m *MockLDAPConnection) PasswordModify(pwdModifyRequest *ldap.PasswordModifyRequest) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "PasswordModify", pwdModifyRequest)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// PasswordModify indicates an expected call of PasswordModify
+func (mr *MockLDAPConnectionMockRecorder) PasswordModify(pwdModifyRequest interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "PasswordModify", reflect.TypeOf((*MockLDAPConnection)(nil).Modify), pwdModifyRequest)
+}
+
 // StartTLS mocks base method
 func (m *MockLDAPConnection) StartTLS(config *tls.Config) error {
 	m.ctrl.T.Helper()

internal/authentication/ldap_user_provider.go

@@ -342,20 +342,30 @@ func (p *LDAPUserProvider) UpdatePassword(inputUsername string, newPassword stri
 		return fmt.Errorf("Unable to update password. Cause: %s", err)
 	}
 
-	modifyRequest := ldap.NewModifyRequest(profile.DN, nil)
+	switch {
+	case p.supportExtensionPasswdModify:
+		modifyRequest := ldap.NewPasswordModifyRequest(
+			profile.DN,
+			"",
+			newPassword,
+		)
 
-	switch p.configuration.Implementation {
-	case schema.LDAPImplementationActiveDirectory:
+		err = conn.PasswordModify(modifyRequest)
+	case p.configuration.Implementation == schema.LDAPImplementationActiveDirectory:
+		modifyRequest := ldap.NewModifyRequest(profile.DN, nil)
 		utf16 := unicode.UTF16(unicode.LittleEndian, unicode.IgnoreBOM)
 		// The password needs to be enclosed in quotes
 		// https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-adts/6e803168-f140-4d23-b2d3-c3a8ab5917d2
 		pwdEncoded, _ := utf16.NewEncoder().String(fmt.Sprintf("\"%s\"", newPassword))
 		modifyRequest.Replace("unicodePwd", []string{pwdEncoded})
-	default:
-		modifyRequest.Replace("userPassword", []string{newPassword})
-	}
 
-	err = conn.Modify(modifyRequest)
+		err = conn.Modify(modifyRequest)
+	default:
+		modifyRequest := ldap.NewModifyRequest(profile.DN, nil)
+		modifyRequest.Replace("userPassword", []string{newPassword})
+
+		err = conn.Modify(modifyRequest)
+	}
 
 	if err != nil {
 		return fmt.Errorf("Unable to update password. Cause: %s", err)

internal/authentication/ldap_user_provider_test.go

@@ -649,10 +649,36 @@ func TestShouldUpdateUserPassword(t *testing.T) {
 		nil,
 		mockFactory)
 
-	modifyRequest := ldap.NewModifyRequest("uid=test,dc=example,dc=com", nil)
-	modifyRequest.Replace("userPassword", []string{"password"})
+	pwdModifyRequest := ldap.NewPasswordModifyRequest(
+		"uid=test,dc=example,dc=com",
+		"",
+		"password",
+	)
 
 	gomock.InOrder(
+		mockFactory.EXPECT().
+			DialURL(gomock.Eq("ldap://127.0.0.1:389"), gomock.Any()).
+			Return(mockConn, nil),
+		mockConn.EXPECT().
+			Bind(gomock.Eq("cn=admin,dc=example,dc=com"), gomock.Eq("password")).
+			Return(nil),
+
+		mockConn.EXPECT().
+			Search(NewExtendedSearchRequestMatcher("(objectClass=*)", "", ldap.ScopeBaseObject, ldap.NeverDerefAliases, false, []string{ldapSupportedExtensionAttribute})).
+			Return(&ldap.SearchResult{
+				Entries: []*ldap.Entry{
+					{
+						DN: "",
+						Attributes: []*ldap.EntryAttribute{
+							{
+								Name:   ldapSupportedExtensionAttribute,
+								Values: []string{ldapOIDPasswdModifyExtension},
+							},
+						},
+					},
+				},
+			}, nil),
+
 		mockFactory.EXPECT().
 			DialURL(gomock.Eq("ldap://127.0.0.1:389"), gomock.Any()).
 			Return(mockConn, nil),
@@ -683,14 +709,16 @@ func TestShouldUpdateUserPassword(t *testing.T) {
 				},
 			}, nil),
 		mockConn.EXPECT().
-			Modify(modifyRequest).
+			PasswordModify(pwdModifyRequest).
 			Return(nil),
 		mockConn.EXPECT().
 			Close(),
 	)
 
-	err := ldapClient.UpdatePassword("john", "password")
+	err := ldapClient.checkServer()
+	require.NoError(t, err)
 
+	err = ldapClient.UpdatePassword("john", "password")
 	require.NoError(t, err)
 }