VerbatimX509Certificate.java revision 10d19e98081bec0e2ee5274f2c46d02d036ce89f 
1/*
2 * Copyright (C) 2018 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.util.apk;
18
19import java.security.cert.CertificateEncodingException;
20import java.security.cert.X509Certificate;
21import java.util.Arrays;
22
23/**
24 * For legacy reasons we need to return exactly the original encoded certificate bytes, instead
25 * of letting the underlying implementation have a shot at re-encoding the data.
26 */
27class VerbatimX509Certificate extends WrappedX509Certificate {
28    private final byte[] mEncodedVerbatim;
29    private int mHash = -1;
30
31    VerbatimX509Certificate(X509Certificate wrapped, byte[] encodedVerbatim) {
32        super(wrapped);
33        this.mEncodedVerbatim = encodedVerbatim;
34    }
35
36    @Override
37    public byte[] getEncoded() throws CertificateEncodingException {
38        return mEncodedVerbatim;
39    }
40
41    @Override
42    public boolean equals(Object o) {
43        if (this == o) return true;
44        if (!(o instanceof VerbatimX509Certificate)) return false;
45
46        try {
47            byte[] a = this.getEncoded();
48            byte[] b = ((VerbatimX509Certificate) o).getEncoded();
49            return Arrays.equals(a, b);
50        } catch (CertificateEncodingException e) {
51            return false;
52        }
53    }
54
55    @Override
56    public int hashCode() {
57        if (mHash == -1) {
58            try {
59                mHash = Arrays.hashCode(this.getEncoded());
60            } catch (CertificateEncodingException e) {
61                mHash = 0;
62            }
63        }
64        return mHash;
65    }
66}
67