content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one or more
   *  contributor license agreements.  See the NOTICE file distributed with
   *  this work for additional information regarding copyright ownership.
   *  The ASF 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
   *
   *     http://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.
   */
  
  /**
  * @author Vladimir N. Molotkov, Alexander Y. Kleymenov
  * @version $Revision$
  */
  
  package android.framework.org.apache.harmony.security_custom.x509;
  
  import java.io.IOException;
  import java.math.BigInteger;
  import android.framework.org.apache.harmony.security_custom.asn1.ASN1Implicit;
  import android.framework.org.apache.harmony.security_custom.asn1.ASN1Integer;
  import android.framework.org.apache.harmony.security_custom.asn1.ASN1Sequence;
  import android.framework.org.apache.harmony.security_custom.asn1.ASN1Type;
  import android.framework.org.apache.harmony.security_custom.asn1.BerInputStream;
  
  /**
   * The class encapsulates the ASN.1 DER encoding/decoding work
   * with PolicyConstraints structure which is a part of X.509 certificate
   * (as specified in RFC 3280 -
   *  Internet X.509 Public Key Infrastructure.
   *  Certificate and Certificate Revocation List (CRL) Profile.
   *  http://www.ietf.org/rfc/rfc3280.txt):
   *
   * <pre>
   *
   *  PolicyConstraints ::= SEQUENCE {
   *       requireExplicitPolicy           [0] SkipCerts OPTIONAL,
   *       inhibitPolicyMapping            [1] SkipCerts OPTIONAL }
   *
   *  SkipCerts ::= INTEGER (0..MAX)
   *
   * </pre>
   *
   * TODO: This class is not fully implemented.
   *
   * @see android.framework.org.apache.harmony.security_custom.x509.GeneralSubtree
   * @see android.framework.org.apache.harmony.security_custom.x509.GeneralName
   */
  public final class PolicyConstraints extends ExtensionValue {
      /** the value of requireExplicitPolicy field of the structure */
      private final BigInteger requireExplicitPolicy;
      /** the value of inhibitPolicyMapping field of the structure */
      private final BigInteger inhibitPolicyMapping;
      /** the ASN.1 encoded form of PolicyConstraints */
      private byte[] encoding;
  
      public PolicyConstraints(BigInteger requireExplicitPolicy,
              BigInteger inhibitPolicyMapping) {
          this.requireExplicitPolicy = requireExplicitPolicy;
          this.inhibitPolicyMapping = inhibitPolicyMapping;
      }
  
      public PolicyConstraints(byte[] encoding) throws IOException {
          super(encoding);
          PolicyConstraints pc = (PolicyConstraints) ASN1.decode(encoding);
          this.requireExplicitPolicy = pc.requireExplicitPolicy;
          this.inhibitPolicyMapping = pc.inhibitPolicyMapping;
      }
  
      private PolicyConstraints(BigInteger requireExplicitPolicy,
                              BigInteger inhibitPolicyMapping, byte[] encoding) {
          this(requireExplicitPolicy, inhibitPolicyMapping);
          this.encoding = encoding;
      }
  
      /**
       * Returns ASN.1 encoded form of this X.509 PolicyConstraints value.
       */
      @Override public byte[] getEncoded() {
          if (encoding == null) {
              encoding = ASN1.encode(this);
          }
          return encoding;
      }
  
      @Override public void dumpValue(StringBuilder sb, String prefix) {
          sb.append(prefix).append("PolicyConstraints: [\n");
          if (requireExplicitPolicy != null) {
              sb.append(prefix).append("  requireExplicitPolicy: ").append(requireExplicitPolicy).append('\n');
          }
          if (inhibitPolicyMapping != null) {
              sb.append(prefix).append("  inhibitPolicyMapping: ").append(inhibitPolicyMapping).append('\n');
          }
          sb.append(prefix).append("]\n");
      }
  
      /**
       * X.509 PolicyConstraints encoder/decoder.
       */
      public static final ASN1Sequence ASN1 = new ASN1Sequence(new ASN1Type[] {
              new ASN1Implicit(0, ASN1Integer.getInstance()),
              new ASN1Implicit(1, ASN1Integer.getInstance()) }) {
          {
              setOptional(0);
              setOptional(1);
          }
  
          @Override protected Object getDecodedObject(BerInputStream in) {
              Object[] values = (Object[]) in.content;
              BigInteger requireExplicitPolicy = null;
              BigInteger inhibitPolicyMapping = null;
              if (values[0] != null) {
                  requireExplicitPolicy = new BigInteger((byte[]) values[0]);
              }
              if (values[1] != null) {
                  inhibitPolicyMapping = new BigInteger((byte[]) values[1]);
              }
              return new PolicyConstraints(
                  requireExplicitPolicy, inhibitPolicyMapping,
                      in.getEncoded());
          }
  
          @Override protected void getValues(Object object, Object[] values) {
              PolicyConstraints pc = (PolicyConstraints) object;
              values[0] = pc.requireExplicitPolicy.toByteArray();
              values[1] = pc.inhibitPolicyMapping.toByteArray();
          }
      };
  }
  