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.security.interfaces.ECPublicKey;
20 import java.security.spec.ECParameterSpec;
21 import java.security.spec.ECPoint;
22 
23 /**
24  * {@link ECPublicKey} backed by keystore.
25  *
26  * @hide
27  */
28 public class AndroidKeyStoreECPublicKey extends AndroidKeyStorePublicKey implements ECPublicKey {
29 
30     private final ECParameterSpec mParams;
31     private final ECPoint mW;
32 
AndroidKeyStoreECPublicKey(String alias, int uid, byte[] x509EncodedForm, ECParameterSpec params, ECPoint w)33     public AndroidKeyStoreECPublicKey(String alias, int uid, byte[] x509EncodedForm, ECParameterSpec params,
34             ECPoint w) {
35         super(alias, uid, KeyProperties.KEY_ALGORITHM_EC, x509EncodedForm);
36         mParams = params;
37         mW = w;
38     }
39 
AndroidKeyStoreECPublicKey(String alias, int uid, ECPublicKey info)40     public AndroidKeyStoreECPublicKey(String alias, int uid, ECPublicKey info) {
41         this(alias, uid, info.getEncoded(), info.getParams(), info.getW());
42         if (!"X.509".equalsIgnoreCase(info.getFormat())) {
43             throw new IllegalArgumentException(
44                     "Unsupported key export format: " + info.getFormat());
45         }
46     }
47 
48     @Override
getParams()49     public ECParameterSpec getParams() {
50         return mParams;
51     }
52 
53     @Override
getW()54     public ECPoint getW() {
55         return mW;
56     }
57 }