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/*
* Copyright (C) 2025 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.
*/
import java.io.ByteArrayInputStream;
import java.io.InvalidClassException;
import java.io.ObjectInputStream;
public class Main {
public static void main(String[] args) throws Exception {
deserializeHexToConcurrentHashMap();
}
public static byte[] hexStringToByteArray(String hexString) {
if (hexString == null || hexString.isEmpty()) {
return new byte[0];
}
if (hexString.length() % 2 != 0) {
throw new IllegalArgumentException("Hex string must have an even number of characters.");
}
int len = hexString.length();
byte[] data = new byte[len / 2];
for (int i = 0; i < len; i += 2) {
int highNibble = Character.digit(hexString.charAt(i), 16);
int lowNibble = Character.digit(hexString.charAt(i + 1), 16);
if (highNibble == -1 || lowNibble == -1) {
throw new IllegalArgumentException(
"Invalid hex character in string: " + hexString.charAt(i) + hexString.charAt(i + 1));
}
data[i / 2] = (byte) ((highNibble << 4) + lowNibble);
}
return data;
}
public static void deserializeHexToConcurrentHashMap() throws Exception {
byte[] bytes = hexStringToByteArray("ACED0005737200266A6176612E7574696C2E636F6E63757272656E742E436F6E63757272656E74486173684D61706499DE129D87293D0300007870737200146A6176612E746578742E44617465466F726D6174642CA1E4C22615FC0200007870737200146A6176612E746578742E44617465466F726D6174642CA1E4C22615FC020000787070707878000000");
ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
ObjectInputStream ois = new ObjectInputStream(bis);
try {
Object deserializedObject = ois.readObject();
throw new Error("Expected InvalidClassException");
} catch (InvalidClassException e) {
// expected
if (!(e.getCause() instanceof InstantiationException)) {
throw new Error("Expected InstantiationException");
}
}
}
}
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