/*
    * Copyright 2024 The Netty Project
    *
    * The Netty Project licenses this file to you under the Apache License,
    * version 2.0 (the "License"); you may not use this file except in compliance
    * with the License. You may obtain a copy of the License at:
    *
    *   https://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   * License for the specific language governing permissions and limitations
   * under the License.
   */
  package io.netty.pkitesting;
  
  import io.netty.util.NetUtil;
  import org.bouncycastle.asn1.ASN1Encodable;
  import org.bouncycastle.asn1.ASN1ObjectIdentifier;
  import org.bouncycastle.asn1.ASN1Primitive;
  import org.bouncycastle.asn1.DERSequence;
  import org.bouncycastle.asn1.DERTaggedObject;
  import org.bouncycastle.asn1.x509.GeneralName;
  
  import java.io.IOException;
  import java.io.UncheckedIOException;
  import java.net.URI;
  import java.net.URISyntaxException;
  import javax.security.auth.x500.X500Principal;
  
  /**
   * Encodes a limited set of GeneralName types, no decoding is supported.
   * See ITU-T X.509 (10/2019) Section 9.3.2.1, or RFC 5280 Section 4.2.1.6.
   */
  final class GeneralNameUtils {
      private GeneralNameUtils() {
      }
  
      static GeneralName otherName(String oid, byte[] value) {
          try {
              DERSequence wrappedValue = new DERSequence(new ASN1Encodable[]{
                      new ASN1ObjectIdentifier(oid),
                      new DERTaggedObject(true, 0, ASN1Primitive.fromByteArray(value))
              });
              return new GeneralName(GeneralName.otherName, wrappedValue);
          } catch (IOException e) {
              throw new UncheckedIOException(e);
          }
      }
  
      static GeneralName rfc822Name(String emailAddress) {
          return new GeneralName(GeneralName.rfc822Name, emailAddress);
      }
  
      static GeneralName dnsName(String dnsName) {
          URI uri = URI.create("ip://" + dnsName);
          String host = uri.getHost();
          return new GeneralName(GeneralName.dNSName, host);
      }
  
      static GeneralName directoryName(String x500Name) {
          return directoryName(new X500Principal(x500Name));
      }
  
      static GeneralName directoryName(X500Principal name) {
          try {
              return new GeneralName(GeneralName.directoryName, ASN1Primitive.fromByteArray(name.getEncoded()));
          } catch (IOException e) {
              throw new UncheckedIOException(e);
          }
      }
  
      static GeneralName uriName(String uri) throws URISyntaxException {
          return uriName(new URI(uri));
      }
  
      static GeneralName uriName(URI uri) {
          return new GeneralName(GeneralName.uniformResourceIdentifier, uri.toASCIIString());
      }
  
      static GeneralName ipAddress(String ipAddress) {
          if (!NetUtil.isValidIpV4Address(ipAddress) && !NetUtil.isValidIpV6Address(ipAddress)) {
              throw new IllegalArgumentException("Not a valid IP address: " + ipAddress);
          }
          return new GeneralName(GeneralName.iPAddress, ipAddress);
      }
  
      static GeneralName registeredId(String oid) {
          return new GeneralName(GeneralName.registeredID, oid);
      }
  }