Fix #74

Author: hhrutter

pkg/pdfcpu/validate/info.go

@@ -46,6 +46,8 @@ func validateInfoDictDate(xRefTable *pdf.XRefTable, o pdf.Object) (err error) {
 
 func validateInfoDictTrapped(o pdf.Object, xRefTable *pdf.XRefTable) error {
 
+	sinceVersion := pdf.V13
+
 	validate := func(s string) bool { return pdf.MemberOf(s, []string{"True", "False", "Unknown"}) }
 
 	if xRefTable.ValidationMode == pdf.ValidationRelaxed {
@@ -54,7 +56,14 @@ func validateInfoDictTrapped(o pdf.Object, xRefTable *pdf.XRefTable) error {
 		}
 	}
 
-	_, err := xRefTable.DereferenceName(o, pdf.V13, validate)
+	_, err := xRefTable.DereferenceName(o, sinceVersion, validate)
+	if err == nil {
+		return nil
+	}
+
+	if xRefTable.ValidationMode == pdf.ValidationRelaxed {
+		_, err = xRefTable.DereferenceBoolean(o, sinceVersion)
+	}
 
 	return err
 }

pkg/pdfcpu/xreftable.go

@@ -728,6 +728,28 @@ func (xRefTable *XRefTable) Dereference(o Object) (Object, error) {
 	return xRefTable.indRefToObject(&ir)
 }
 
+// DereferenceBoolean resolves and validates a boolean object, which may be an indirect reference.
+func (xRefTable *XRefTable) DereferenceBoolean(o Object, sinceVersion Version) (*Boolean, error) {
+
+	o, err := xRefTable.Dereference(o)
+	if err != nil || o == nil {
+		return nil, err
+	}
+
+	b, ok := o.(Boolean)
+	if !ok {
+		return nil, errors.Errorf("DereferenceBoolean: wrong type <%v>", o)
+	}
+
+	// Version check
+	err = xRefTable.ValidateVersion("DereferenceBoolean", sinceVersion)
+	if err != nil {
+		return nil, err
+	}
+
+	return &b, nil
+}
+
 // DereferenceInteger resolves and validates an integer object, which may be an indirect reference.
 func (xRefTable *XRefTable) DereferenceInteger(o Object) (*Integer, error) {