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.keystore;
  
  import java.math.BigInteger;
  import java.security.interfaces.RSAPublicKey;
  
  /**
   * {@link RSAPublicKey} backed by Android Keystore.
   *
   * @hide
   */
  public class AndroidKeyStoreRSAPublicKey extends AndroidKeyStorePublicKey implements RSAPublicKey {
      private final BigInteger mModulus;
      private final BigInteger mPublicExponent;
  
      public AndroidKeyStoreRSAPublicKey(String alias, int uid, byte[] x509EncodedForm, BigInteger modulus,
              BigInteger publicExponent) {
          super(alias, uid, KeyProperties.KEY_ALGORITHM_RSA, x509EncodedForm);
          mModulus = modulus;
          mPublicExponent = publicExponent;
      }
  
      public AndroidKeyStoreRSAPublicKey(String alias, int uid, RSAPublicKey info) {
          this(alias, uid, info.getEncoded(), info.getModulus(), info.getPublicExponent());
          if (!"X.509".equalsIgnoreCase(info.getFormat())) {
              throw new IllegalArgumentException(
                      "Unsupported key export format: " + info.getFormat());
          }
      }
  
      @Override
      public BigInteger getModulus() {
          return mModulus;
      }
  
      @Override
      public BigInteger getPublicExponent() {
          return mPublicExponent;
      }
  }
  