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
17package android.security.keystore;
18
19import java.math.BigInteger;
20import java.security.interfaces.RSAPublicKey;
21
22/**
23 * {@link RSAPublicKey} backed by Android Keystore.
24 *
25 * @hide
26 */
27public 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