1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.security.keystore; 18 19 import java.math.BigInteger; 20 import java.security.interfaces.RSAPublicKey; 21 22 /** 23 * {@link RSAPublicKey} backed by Android Keystore. 24 * 25 * @hide 26 */ 27 public class AndroidKeyStoreRSAPublicKey extends AndroidKeyStorePublicKey implements RSAPublicKey { 28 private final BigInteger mModulus; 29 private final BigInteger mPublicExponent; 30 31 public AndroidKeyStoreRSAPublicKey(String alias, int uid, byte[] x509EncodedForm, BigInteger modulus, 32 BigInteger publicExponent) { 33 super(alias, uid, KeyProperties.KEY_ALGORITHM_RSA, x509EncodedForm); 34 mModulus = modulus; 35 mPublicExponent = publicExponent; 36 } 37 38 public AndroidKeyStoreRSAPublicKey(String alias, int uid, RSAPublicKey info) { 39 this(alias, uid, info.getEncoded(), info.getModulus(), info.getPublicExponent()); 40 if (!"X.509".equalsIgnoreCase(info.getFormat())) { 41 throw new IllegalArgumentException( 42 "Unsupported key export format: " + info.getFormat()); 43 } 44 } 45 46 @Override 47 public BigInteger getModulus() { 48 return mModulus; 49 } 50 51 @Override 52 public BigInteger getPublicExponent() { 53 return mPublicExponent; 54 } 55 } 56
