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.
   */
  
  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.ASN1Boolean;
  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;
  
  /**
   * Basic Constraints Extension (OID == 2.5.29.19).
   *
   * The ASN.1 definition for Basic Constraints Extension is:
   *
   * <pre>
   *   id-ce-basicConstraints OBJECT IDENTIFIER ::=  { id-ce 19 }
   *
   *   BasicConstraints ::= SEQUENCE {
   *        ca                      BOOLEAN DEFAULT FALSE,
   *        pathLenConstraint       INTEGER (0..MAX) OPTIONAL
   *   }
   * </pre>
   * (as specified in RFC 3280)
   */
  public final class BasicConstraints extends ExtensionValue {
      /** is CA */
      private boolean ca = false;
      /** path len constraint */
      private int pathLenConstraint = Integer.MAX_VALUE;
  
      /**
       * Creates the extension object on the base of its encoded form.
       */
      public BasicConstraints(byte[] encoding) throws IOException {
          super(encoding);
          Object[] values = (Object[]) ASN1.decode(encoding);
          ca = (Boolean) values[0];
          if (values[1] != null) {
              pathLenConstraint = new BigInteger((byte[]) values[1]).intValue();
          }
      }
  
      public int getPathLenConstraint() {
          return pathLenConstraint;
      }
  
      /**
       * Returns the encoded form of the object.
       */
      public byte[] getEncoded() {
          if (encoding == null) {
              encoding = ASN1.encode(new Object[]{ca, BigInteger.valueOf(pathLenConstraint) });
          }
          return encoding;
      }
  
      public void dumpValue(StringBuilder sb, String prefix) {
          sb.append(prefix).append("BasicConstraints [\n").append(prefix)
              .append("  CA: ").append(ca)
              .append("\n  ").append(prefix).append("pathLenConstraint: ")
              .append(pathLenConstraint).append('\n').append(prefix)
              .append("]\n");
      }
  
      /**
       * ASN.1 Encoder/Decoder.
       */
      public static final ASN1Type ASN1 = new ASN1Sequence(new ASN1Type[] {
              ASN1Boolean.getInstance(), ASN1Integer.getInstance() }) {
          {
              setDefault(Boolean.FALSE, 0);
              setOptional(1);
          }
  
          public Object getDecodedObject(BerInputStream in) throws IOException {
              return in.content;
          }
  
          protected void getValues(Object object, Object[] values) {
              Object[] array = (Object[]) object;
              values[0] = array[0];
              values[1] = ((BigInteger) array[1]).toByteArray();
          }
      };
  }
  