Android中的加密解密视频问题

时间:2018-12-15 07:47:03

标签: android

我是android的初学者。我想在android中加密和解密视频文件,所以我在网上搜索了很多,发现下面的代码。该代码生成0 KB文件。这段代码有什么问题?

 String filePath = "/storage/emulated/0/Download/r.mp4";

String outPath = "/storage/emulated/0/Download/r-enc.mp4";

String inPath = "/storage/emulated/0/Download/r-dec.mp4";

static void encrypt() throws IOException, NoSuchAlgorithmException,
        NoSuchPaddingException, InvalidKeyException {
    FileInputStream fis = new FileInputStream(filePath);
    FileOutputStream fos = new FileOutputStream(outPath);
    SecretKeySpec sks = new SecretKeySpec("Programchi".getBytes(), "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.ENCRYPT_MODE, sks);
    CipherOutputStream cos = new CipherOutputStream(fos, cipher);
    int b;
    byte[] d = new byte[128];
    while ((b = fis.read(d)) != -1) {
        cos.write(d, 0, b);
    }
    cos.flush();
    cos.close();
    fis.close();
}

static void decrypt() throws IOException, NoSuchAlgorithmException,
        NoSuchPaddingException, InvalidKeyException {

    FileInputStream fis = new FileInputStream(outPath);
    FileOutputStream fos = new FileOutputStream(inPath);
    SecretKeySpec sks = new SecretKeySpec("oldfeelwasverynb".getBytes(),
            "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, sks);
    CipherInputStream cis = new CipherInputStream(fis, cipher);
    int b;
    byte[] d = new byte[128];
    while ((b = cis.read(d)) != -1) {
        fos.write(d, 0, b);
    }
    fos.flush();
    fos.close();
    cis.close();
}

也在logcat中,我得到以下错误

  

W / System.err:原因:java.lang.IllegalArgumentException:密钥长度不是128/192/256位。

0 个答案:

没有答案