content: /*
   * Copyright (C) 2018 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.hardware.biometrics;
  
  import android.annotation.NonNull;
  import android.security.keystore.AndroidKeyStoreProvider;
  
  import java.security.Signature;
  
  import javax.crypto.Cipher;
  import javax.crypto.Mac;
  
  /**
   * A wrapper class for the crypto objects supported by BiometricPrompt and FingerprintManager.
   * Currently the framework supports {@link Signature}, {@link Cipher} and {@link Mac} objects.
   * @hide
   */
  public class CryptoObject {
      private final Object mCrypto;
  
      public CryptoObject(@NonNull Signature signature) {
          mCrypto = signature;
      }
  
      public CryptoObject(@NonNull Cipher cipher) {
          mCrypto = cipher;
      }
  
      public CryptoObject(@NonNull Mac mac) {
          mCrypto = mac;
      }
  
      /**
       * Get {@link Signature} object.
       * @return {@link Signature} object or null if this doesn't contain one.
       */
      public Signature getSignature() {
          return mCrypto instanceof Signature ? (Signature) mCrypto : null;
      }
  
      /**
       * Get {@link Cipher} object.
       * @return {@link Cipher} object or null if this doesn't contain one.
       */
      public Cipher getCipher() {
          return mCrypto instanceof Cipher ? (Cipher) mCrypto : null;
      }
  
      /**
       * Get {@link Mac} object.
       * @return {@link Mac} object or null if this doesn't contain one.
       */
      public Mac getMac() {
          return mCrypto instanceof Mac ? (Mac) mCrypto : null;
      }
  
      /**
       * @hide
       * @return the opId associated with this object or 0 if none
       */
      public final long getOpId() {
          return mCrypto != null
                  ? AndroidKeyStoreProvider.getKeyStoreOperationHandle(mCrypto) : 0;
      }
  };
  