content: /*
   * Copyright (C) 2015 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 android.security.net.config;
  
  import java.util.Arrays;
  
  /** @hide */
  public final class Pin {
      public final String digestAlgorithm;
      public final byte[] digest;
  
      private final int mHashCode;
  
      public Pin(String digestAlgorithm, byte[] digest) {
          this.digestAlgorithm = digestAlgorithm;
          this.digest = digest;
          mHashCode = Arrays.hashCode(digest) ^ digestAlgorithm.hashCode();
      }
  
      /**
       * @hide
       */
      public static boolean isSupportedDigestAlgorithm(String algorithm) {
          // Currently only SHA-256 is supported. SHA-512 if/once Chromium networking stack
          // supports it.
          return "SHA-256".equalsIgnoreCase(algorithm);
      }
  
      /**
       * @hide
       */
      public static int getDigestLength(String algorithm) {
          if ("SHA-256".equalsIgnoreCase(algorithm)) {
              return 32;
          }
          throw new IllegalArgumentException("Unsupported digest algorithm: " + algorithm);
      }
  
      @Override
      public int hashCode() {
          return mHashCode;
      }
  
      @Override
      public boolean equals(Object obj) {
          if (this == obj) {
              return true;
          }
          if (!(obj instanceof Pin)) {
              return false;
          }
          Pin other = (Pin) obj;
          if (other.hashCode() != mHashCode) {
              return false;
          }
          if (!Arrays.equals(digest, other.digest)) {
              return false;
          }
          if (!digestAlgorithm.equals(other.digestAlgorithm)) {
              return false;
          }
          return true;
      }
  }
  