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The CycloneDX core module provides a model representation of the BOM along with utilities to assist in creating, parsing, and validating BOMs.

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/*
 * This file is part of CycloneDX Core (Java).
 *
 * 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 * Copyright (c) Steve Springett. All Rights Reserved.
 */
package org.cyclonedx.util;

import org.apache.commons.codec.digest.DigestUtils;
import org.cyclonedx.model.Hash;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.List;

@SuppressWarnings("unused")
public final class BomUtils {

    private BomUtils() { }

    /**
     * Calculates the hashes of the specified file.
     * @param file the File to calculate hashes on
     * @return a List of Hash objets
     * @throws IOException an IOException
     * @since 1.0.0
     */
    public static List calculateHashes(File file) throws IOException {
        if (file == null || !file.exists() || !file.canRead()) {
            return null;
        }
        final List hashes = new ArrayList<>();
        try (InputStream fis = Files.newInputStream(file.toPath())) {
            hashes.add(new Hash(Hash.Algorithm.MD5, DigestUtils.md5Hex(fis)));
        }
        try (InputStream fis = Files.newInputStream(file.toPath())) {
            hashes.add(new Hash(Hash.Algorithm.SHA1, DigestUtils.sha1Hex(fis)));
        }
        try (InputStream fis = Files.newInputStream(file.toPath())) {
            hashes.add(new Hash(Hash.Algorithm.SHA_256, DigestUtils.sha256Hex(fis)));
        }
        try (InputStream fis = Files.newInputStream(file.toPath())) {
            hashes.add(new Hash(Hash.Algorithm.SHA_384, DigestUtils.sha384Hex(fis)));
        }
        try (InputStream fis = Files.newInputStream(file.toPath())) {
            hashes.add(new Hash(Hash.Algorithm.SHA_512, DigestUtils.sha512Hex(fis)));
        }
        return hashes;
    }
}