    public String encodeForLdap(String input) {
        if( input == null ) {
            return null;
        }
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < input.length(); i++) {
            char c = input.charAt(i);
            switch (c) {
                case '\\':
                    sb.append("\\5c");
                    break;
                case '*':
                    sb.append("\\2a");
                    break;
                case '(':
                    sb.append("\\28");
                    break;
                case ')':
                    sb.append("\\29");
                    break;
                case '\0':
                    sb.append("\\00");
                    break;
                default:
                    sb.append(c);
            }
        }
        return sb.toString();
    }
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.