/*
* Copyright (C) 2017 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 com.android.apksig.internal.util;
import java.security.cert.CertificateEncodingException;
import java.security.cert.X509Certificate;
import java.util.Arrays;
/**
* {@link X509Certificate} whose {@link #getEncoded()} returns the data provided at construction
* time.
*/
public class GuaranteedEncodedFormX509Certificate extends DelegatingX509Certificate {
private static final long serialVersionUID = 1L;
private final byte[] mEncodedForm;
private int mHash = -1;
public GuaranteedEncodedFormX509Certificate(X509Certificate wrapped, byte[] encodedForm) {
super(wrapped);
this.mEncodedForm = (encodedForm != null) ? encodedForm.clone() : null;
}
@Override
public byte[] getEncoded() throws CertificateEncodingException {
return (mEncodedForm != null) ? mEncodedForm.clone() : null;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof X509Certificate)) return false;
try {
byte[] a = this.getEncoded();
byte[] b = ((X509Certificate) o).getEncoded();
return Arrays.equals(a, b);
} catch (CertificateEncodingException e) {
return false;
}
}
@Override
public int hashCode() {
if (mHash == -1) {
try {
mHash = Arrays.hashCode(this.getEncoded());
} catch (CertificateEncodingException e) {
mHash = 0;
}
}
return mHash;
}
}