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 Alexander Y. Kleymenov
  * @version $Revision$
  */
  
  package android.framework.org.apache.harmony.security_custom.x509;
  
  import android.framework.org.apache.harmony.security_custom.asn1.ASN1BitString;
  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;
  import android.framework.org.apache.harmony.security_custom.asn1.BitString;
  
  /**
   * The class encapsulates the ASN.1 DER encoding/decoding work
   * with the X.509 certificate. Its ASN notation is as follows
   * (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>
   *  Certificate  ::=  SEQUENCE  {
   *      tbsCertificate       TBSCertificate,
   *      signatureAlgorithm   AlgorithmIdentifier,
   *      signatureValue       BIT STRING
   *  }
   * </pre>
   */
  public final class Certificate {
      /** the value of tbsCertificate field of the structure */
      private final TBSCertificate tbsCertificate;
      /** the value of signatureAlgorithm field of the structure */
      private final AlgorithmIdentifier signatureAlgorithm;
      /** the value of signatureValue field of the structure */
      private final byte[] signatureValue;
      /** the ASN.1 encoded form of Certificate */
      private byte[] encoding;
  
      public Certificate(TBSCertificate tbsCertificate,
                         AlgorithmIdentifier signatureAlgorithm,
                         byte[] signatureValue) {
          this.tbsCertificate = tbsCertificate;
          this.signatureAlgorithm = signatureAlgorithm;
          this.signatureValue = new byte[signatureValue.length];
          System.arraycopy(signatureValue, 0, this.signatureValue, 0,
                                                      signatureValue.length);
      }
  
      private Certificate(TBSCertificate tbsCertificate,
                         AlgorithmIdentifier signatureAlgorithm,
                         byte[] signatureValue, byte[] encoding) {
          this(tbsCertificate, signatureAlgorithm, signatureValue);
          this.encoding = encoding;
      }
  
      /**
       * Returns the value of tbsCertificate field of the structure.
       */
      public TBSCertificate getTbsCertificate() {
          return tbsCertificate;
      }
  
      /**
       * Returns the value of signatureValue field of the structure.
       */
      public byte[] getSignatureValue() {
          return signatureValue.clone();
      }
  
      @Override public String toString() {
          StringBuilder result = new StringBuilder();
          result.append("X.509 Certificate:\n[\n");
          tbsCertificate.dumpValue(result);
          result.append("\n  Algorithm: [");
          signatureAlgorithm.dumpValue(result);
          result.append(']');
          result.append("\n  Signature Value:\n");
          for(byte b :signatureValue)
            result.append(b);
          result.append(']');
          return result.toString();
      }
  
      /**
       * Returns ASN.1 encoded form of this X.509 TBSCertificate value.
       */
      public byte[] getEncoded() {
          if (encoding == null) {
              encoding = Certificate.ASN1.encode(this);
          }
          return encoding;
      }
  
      /**
       * X.509 Certificate encoder/decoder.
       */
      public static final ASN1Sequence ASN1 =
          new ASN1Sequence(new ASN1Type[]
                  {TBSCertificate.ASN1, AlgorithmIdentifier.ASN1, ASN1BitString.getInstance()}) {
  
          @Override protected Object getDecodedObject(BerInputStream in) {
              Object[] values = (Object[]) in.content;
              return new Certificate(
                      (TBSCertificate) values[0],
                      (AlgorithmIdentifier) values[1],
                      ((BitString) values[2]).bytes, // FIXME keep as BitString object
                      in.getEncoded());
          }
  
          @Override protected void getValues(Object object, Object[] values) {
              Certificate cert = (Certificate) object;
              values[0] = cert.tbsCertificate;
              values[1] = cert.signatureAlgorithm;
              values[2] = new BitString(cert.signatureValue, 0);
          }
      };
  }
  