validate space names

Signed-off-by: jkoberg <jkoberg@owncloud.com>

changelog/unreleased/validate-space-names.md

@@ -0,0 +1,9 @@
+Enhancement: Validate space names
+
+We now return BAD REQUEST when space names are not
+-  too long (max 255 characters)
+-  containing evil characters (/, \, ., \\, :, ?, *, ", >, <, |)
+
+Additionally leading and trailing spaces will be removed silently.
+
+https://github.com/owncloud/ocis/pull/4954

services/graph/pkg/service/v0/drives.go

@@ -33,6 +33,17 @@ import (
 	merrors "go-micro.dev/v4/errors"
 )
 
+var (
+	_invalidSpaceNameCharacters = []string{`/`, `\`, `.`, `\\`, `:`, `?`, `*`, `"`, `>`, `<`, `|`}
+	_maxSpaceNameLength         = 255
+
+	// ErrNameTooLong is thrown when the spacename is too long
+	ErrNameTooLong = fmt.Errorf("spacename must be smaller than %d", _maxSpaceNameLength)
+
+	// ErrForbiddenCharacter is thrown when the spacename contains an invalid character
+	ErrForbiddenCharacter = fmt.Errorf("spacenames must not contain %v", _invalidSpaceNameCharacters)
+)
+
 // GetDrives lists all drives the current user has access to
 func (g Graph) GetDrives(w http.ResponseWriter, r *http.Request) {
 	g.getDrives(w, r, false)
@@ -229,13 +240,19 @@ func (g Graph) CreateDrive(w http.ResponseWriter, r *http.Request) {
 		errorcode.InvalidRequest.Render(w, r, http.StatusBadRequest, "invalid body schema definition")
 		return
 	}
-	spaceName := *drive.Name
+	spaceName := strings.TrimSpace(*drive.Name)
 	if spaceName == "" {
 		logger.Debug().Str("name", spaceName).Msg("could not create drive: invalid name")
 		errorcode.InvalidRequest.Render(w, r, http.StatusBadRequest, "invalid name")
 		return
 	}
 
+	if err := validateSpaceName(spaceName); err != nil {
+		logger.Debug().Str("name", spaceName).Err(err).Msg("could not create drive: name validation failed")
+		errorcode.InvalidRequest.Render(w, r, http.StatusBadRequest, fmt.Sprintf("invalid spacename: %s", err.Error()))
+		return
+	}
+
 	var driveType string
 	if drive.DriveType != nil {
 		driveType = *drive.DriveType
@@ -901,3 +918,17 @@ func sortSpaces(req *godata.GoDataRequest, spaces []*libregraph.Drive) ([]*libre
 	sort.Sort(sorter)
 	return spaces, nil
 }
+
+func validateSpaceName(name string) error {
+	if len(name) > _maxSpaceNameLength {
+		return ErrNameTooLong
+	}
+
+	for _, c := range _invalidSpaceNameCharacters {
+		if strings.Contains(name, c) {
+			return ErrForbiddenCharacter
+		}
+	}
+
+	return nil
+}

services/graph/pkg/service/v0/drives_test.go

@@ -7,6 +7,7 @@ import (
 	"github.com/CiscoM31/godata"
 	libregraph "github.com/owncloud/libre-graph-api-go"
 	"github.com/stretchr/testify/assert"
+	"github.com/test-go/testify/require"
 )
 
 type sortTest struct {
@@ -121,3 +122,34 @@ func TestSort(t *testing.T) {
 		assert.Equal(t, test.DrivesSorted, sorted)
 	}
 }
+
+func TestSpaceNameValidation(t *testing.T) {
+	// set max length
+	_maxSpaceNameLength = 10
+
+	testCases := []struct {
+		Alias         string
+		SpaceName     string
+		ExpectedError error
+	}{
+		{"Happy Path", "Space", nil},
+		{"Just not too Long", "abcdefghij", nil},
+		{"Too Long", "abcdefghijk", ErrNameTooLong},
+		{"Contains /", "Space/", ErrForbiddenCharacter},
+		{`Contains \`, `Space\`, ErrForbiddenCharacter},
+		{`Contains \\`, `Space\\`, ErrForbiddenCharacter},
+		{"Contains .", "Space.", ErrForbiddenCharacter},
+		{"Contains :", "Space:", ErrForbiddenCharacter},
+		{"Contains ?", "Sp?ace", ErrForbiddenCharacter},
+		{"Contains *", "Spa*ce", ErrForbiddenCharacter},
+		{`Contains "`, `"Space"`, ErrForbiddenCharacter},
+		{`Contains >`, `Sp>ce`, ErrForbiddenCharacter},
+		{`Contains <`, `S<pce`, ErrForbiddenCharacter},
+		{`Contains |`, `S|p|e`, ErrForbiddenCharacter},
+	}
+
+	for _, tc := range testCases {
+		err := validateSpaceName(tc.SpaceName)
+		require.Equal(t, tc.ExpectedError, err, tc.Alias)
+	}
+}