content: /*
   * Copyright (C) 2017 The Android Open Source Project
   *
   * Licensed 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 com.android.apksig.internal.util;
  
  import java.security.cert.CertificateEncodingException;
  import java.security.cert.X509Certificate;
  import java.util.Arrays;
  
  /**
   * {@link X509Certificate} whose {@link #getEncoded()} returns the data provided at construction
   * time.
   */
  public class GuaranteedEncodedFormX509Certificate extends DelegatingX509Certificate {
      private static final long serialVersionUID = 1L;
  
      private final byte[] mEncodedForm;
      private int mHash = -1;
  
      public GuaranteedEncodedFormX509Certificate(X509Certificate wrapped, byte[] encodedForm) {
          super(wrapped);
          this.mEncodedForm = (encodedForm != null) ? encodedForm.clone() : null;
      }
  
      @Override
      public byte[] getEncoded() throws CertificateEncodingException {
          return (mEncodedForm != null) ? mEncodedForm.clone() : null;
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) return true;
          if (!(o instanceof X509Certificate)) return false;
  
          try {
              byte[] a = this.getEncoded();
              byte[] b = ((X509Certificate) o).getEncoded();
              return Arrays.equals(a, b);
          } catch (CertificateEncodingException e) {
              return false;
          }
      }
  
      @Override
      public int hashCode() {
          if (mHash == -1) {
              try {
                  mHash = Arrays.hashCode(this.getEncoded());
              } catch (CertificateEncodingException e) {
                  mHash = 0;
              }
          }
          return mHash;
      }
  }
  