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Apache Commons Compress defines an API for working with compression and archive formats. These include bzip2, gzip, pack200, LZMA, XZ, Snappy, traditional Unix Compress, DEFLATE, DEFLATE64, LZ4, Brotli, Zstandard and ar, cpio, jar, tar, zip, dump, 7z, arj.

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/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 org.apache.commons.compress.utils;

import java.io.InputStream;
import java.util.zip.CRC32;

/**
 * A stream that verifies the CRC of the data read once the stream is
 * exhausted.
 * @NotThreadSafe
 * @since 1.6
 */
public class CRC32VerifyingInputStream extends ChecksumVerifyingInputStream {
    
    /**
     * @param in the stream to wrap
     * @param size the of the stream's content
     * @param expectedCrc32 the expected checksum
     */
    public CRC32VerifyingInputStream(final InputStream in, final long size, final int expectedCrc32) {
        this(in, size, expectedCrc32 & 0xFFFFffffl);
    }

    /**
     * @since 1.7
     * @param in the stream to wrap
     * @param size the of the stream's content
     * @param expectedCrc32 the expected checksum
     */
    public CRC32VerifyingInputStream(final InputStream in, final long size, final long expectedCrc32) {
        super(new CRC32(), in, size, expectedCrc32);
    }

}