java 对视频音频各种文件进行加密解密

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tips：纯属小爱好，java 对视频/音频/各种文件加密解密

本文使用AES对称式加密，对各种文件进行加密/解密，只需要给一个秘钥，还有资源目录以及输出目录即可。（不限制文件大小，10个G的文件也可以用）

前提：导入hutool-all工具包

/**
 * AES文件加密解密（增强版）
 *
 * @Author: coder
 * @Description:
 */
public class FileAES {

    /**
     * 根据参数生成KEY
     */
    public static Key getKey(String strKey) {
        Key key;
        try {
            KeyGenerator generator = KeyGenerator.getInstance("AES");
            generator.init(new SecureRandom(strKey.getBytes()));
            key = generator.generateKey();
            generator = null;
        } catch (Exception e) {
            throw new RuntimeException("Error initializing SqlMap class. Cause: " + e);
        }
        return key;
    }


    /**
     * 文件采用AES算法解密文件
     */
    public static void decrypt(String sourceDir, String targetDir, Key key) throws Exception {
        System.out.println("开始解密......");
        System.out.println("资源目录：" + sourceDir);
        System.out.println("输出目录：" + targetDir);
        long startL = System.currentTimeMillis();
        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.DECRYPT_MODE, key);
        List<String> fileNames = FileUtil.listFileNames(sourceDir);
        System.out.println("资源文件总数量：" + fileNames.size());
        System.out.println("-----------------start-----------------");
        int i = 1;
        for (String sourceFileName : fileNames) {
            long start = System.currentTimeMillis();
            System.out.println("当前进度：" + i++ + "/" + fileNames.size());
            String sourceStr = sourceDir + "/" + sourceFileName;
            long size = FileUtil.size(new File(sourceStr));
            System.out.println("源文件-名称：" + sourceFileName + ",size：" + size / (1024 * 1024) + "(MB)" + ", " + NumberUtil.div(size, (1024 * 1024 * 1024)) + "(GB)");
            String prefix = FileUtil.getPrefix(sourceFileName);
            String suffix = FileUtil.getSuffix(sourceFileName);
            byte[] bytes = HexUtil.decodeHex(prefix);
            byte[] result = cipher.doFinal(bytes);
            String decryptName = new String(result);
            String encFileStr = targetDir + "/" + decryptName + "." + suffix;
            InputStream is = new FileInputStream(sourceStr);
            OutputStream out = new FileOutputStream(encFileStr);
            CipherOutputStream cos = new CipherOutputStream(out, cipher);
            byte[] buffer = new byte[1024 * 1024];
            int r;
            while ((r = is.read(buffer)) >= 0) {
                cos.write(buffer, 0, r);
            }
            cos.close();
            out.close();
            is.close();
            long end = System.currentTimeMillis();
            System.out.println("输出文件-名称：" + decryptName + "." + suffix);
            System.out.println("小计耗时:" + (end - start) / 1000 + "s");
            System.out.println();
        }
        System.out.println("------------------end----------------");
        System.out.println("解密完成,总计耗时:" + (System.currentTimeMillis() - startL) / 1000 + "s");
    }

    public static void encrypt(String sourceDir, String targetDir, Key key) throws Exception {
        System.out.println("开始加密......");
        System.out.println("资源目录：" + sourceDir);
        System.out.println("输出目录：" + targetDir);
        long startL = System.currentTimeMillis();
        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, key);
        List<String> fileNames = FileUtil.listFileNames(sourceDir);
        System.out.println("资源文件总数量：" + fileNames.size());
        System.out.println("-----------------start-----------------");
        int i = 1;
        for (String sourceFileName : fileNames) {
            long start = System.currentTimeMillis();
            System.out.println("当前进度：" + i++ + "/" + fileNames.size());
            String sourceStr = sourceDir + "/" + sourceFileName;
            long size = FileUtil.size(new File(sourceStr));
            System.out.println("源文件-名称：" + sourceFileName + ",size：" + size / (1024 * 1024) + "(MB)" + ", " + NumberUtil.div(size, (1024 * 1024 * 1024)) + "(GB)");
            String prefix = FileUtil.getPrefix(sourceFileName);
            String suffix = FileUtil.getSuffix(sourceFileName);
            byte[] result = cipher.doFinal(prefix.getBytes());
            String encryptHexName = HexUtil.encodeHexStr(result);
            String encFileStr = targetDir + "/" + encryptHexName + "." + suffix;
            InputStream is = new FileInputStream(sourceStr);
            OutputStream out = new FileOutputStream(encFileStr);
            CipherOutputStream cos = new CipherOutputStream(out, cipher);
            byte[] buffer = new byte[1024 * 1024];
            int r;
            while ((r = is.read(buffer)) >= 0) {
                cos.write(buffer, 0, r);
            }
            cos.close();
            out.close();
            is.close();
            long end = System.currentTimeMillis();
            System.out.println("输出文件-名称：" + encryptHexName + "." + suffix);
            System.out.println("小计耗时:" + (end - start) / 1000 + "s");
            System.out.println();
        }
        System.out.println("------------------end----------------");
        System.out.println("加密完成,总计耗时:" + (System.currentTimeMillis() - startL) / 1000 + "s");
    }


    public static void main(String[] args) throws Exception {
        Key key = getKey("密钥123456");
        String sourceDir = "E:/mp4";
        String targetDir = "E:/enc-mp4";
        String decDir = "E:/dec-mp4";
        encrypt(sourceDir, targetDir, key);
        decrypt(targetDir, decDir, key);
    }
}

本文标签： 音频加密解密文件视频Java