+ public static void checkCertifyableDomain(String s, boolean hasPunycodeRight) throws GigiApiException {
+ String[] parts = s.split("\\.", -1);
+ if (parts.length < 2) {
+ throw new GigiApiException("Domain does not contain '.'.");
+ }
+ for (int i = parts.length - 1; i >= 0; i--) {
+ if ( !isVaildDomainPart(parts[i], hasPunycodeRight)) {
+ throw new GigiApiException("Syntax error in Domain");
+ }
+ }
+ String publicSuffix = PublicSuffixes.getInstance().getRegistrablePart(s);
+ if ( !s.equals(publicSuffix)) {
+ throw new GigiApiException("You may only register a domain with exactly one lable before the public suffix.");
+ }
+ checkPunycode(parts[0], s.substring(parts[0].length() + 1));
+ }
+
+ private static void checkPunycode(String label, String domainContext) throws GigiApiException {
+ if (label.charAt(2) != '-' || label.charAt(3) != '-') {
+ return; // is no punycode
+ }
+ if ( !IDNEnabledTLDs.contains(domainContext)) {
+ throw new GigiApiException("Punycode label could not be positively verified.");
+ }
+ if ( !label.startsWith("xn--")) {
+ throw new GigiApiException("Unknown ACE prefix.");
+ }
+ try {
+ String unicode = IDN.toUnicode(label);
+ if (unicode.startsWith("xn--")) {
+ throw new GigiApiException("Punycode label could not be positively verified.");
+ }
+ } catch (IllegalArgumentException e) {
+ throw new GigiApiException("Punycode label could not be positively verified.");
+ }
+ }
+
+ public static boolean isVaildDomainPart(String s, boolean allowPunycode) {
+ if ( !s.matches("[a-z0-9-]+")) {
+ return false;
+ }
+ if (s.charAt(0) == '-' || s.charAt(s.length() - 1) == '-') {
+ return false;
+ }
+ if (s.length() > 63) {
+ return false;
+ }
+ boolean canBePunycode = s.length() >= 4 && s.charAt(2) == '-' && s.charAt(3) == '-';
+ if (canBePunycode && !allowPunycode) {
+ return false;
+ }
+ return true;
+ }
+