android 加解密的速度和什么有关系,android实现视频的加密和解密（使用AES）

柔情只为你懂 2022-10-17 11:24 7阅读 0赞

java语言进行加密解密速度挺慢的。。一个6MB左右的文件需要10多秒。。。等有空了瞅瞅ffmpeg去。。

MainActivity.java

/\*\*

\* 视频加密/解密

\* @author oldfeel

\* Created on: 2014-2-17

\*/

public class MainActivity extends Activity \{

// 原文件

private static final String filePath = "/sdcard/DCIM/Camera/VID\_20140217\_144346.mp4";

// 加密后的文件

private static final String outPath = "/sdcard/DCIM/Camera/encrypt.mp4";

// 加密再解密后的文件

private static final String inPath = "/sdcard/DCIM/Camera/decrypt.mp4";

@Override

protected void onCreate(Bundle savedInstanceState) \{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity\_main);

Button encryptButton = (Button) findViewById(R.id.main\_encrypt);

Button DecryptButton = (Button) findViewById(R.id.main\_decrypt);

encryptButton.setOnClickListener(new OnClickListener() \{

@Override

public void onClick(View v) \{

try \{

encrypt();

Toast.makeText(getApplicationContext(), "加密完成",

Toast.LENGTH\_SHORT).show();

\} catch (InvalidKeyException e) \{

e.printStackTrace();

\} catch (NoSuchAlgorithmException e) \{

e.printStackTrace();

\} catch (NoSuchPaddingException e) \{

e.printStackTrace();

\} catch (IOException e) \{

e.printStackTrace();

\});

DecryptButton.setOnClickListener(new OnClickListener() \{

@Override

public void onClick(View v) \{

try \{

decrypt();

Toast.makeText(getApplicationContext(), "解密完成",

Toast.LENGTH\_SHORT).show();

\} catch (InvalidKeyException e) \{

e.printStackTrace();

\} catch (NoSuchAlgorithmException e) \{

e.printStackTrace();

\} catch (NoSuchPaddingException e) \{

e.printStackTrace();

\} catch (IOException e) \{

e.printStackTrace();

\});

/\*\*

\* Here is Both function for encrypt and decrypt file in Sdcard folder. we

\* can not lock folder but we can encrypt file using AES in Android, it may

\* help you.

\* @throws IOException

\* @throws NoSuchAlgorithmException

\* @throws NoSuchPaddingException

\* @throws InvalidKeyException

\*/

static void encrypt() throws IOException, NoSuchAlgorithmException,

NoSuchPaddingException, InvalidKeyException \{

// Here you read the cleartext.

FileInputStream fis = new FileInputStream(filePath);

// This stream write the encrypted text. This stream will be wrapped by

// another stream.

FileOutputStream fos = new FileOutputStream(outPath);

// Length is 16 byte

SecretKeySpec sks = new SecretKeySpec("MyDifficultPassw".getBytes(),

"AES");

// Create cipher

Cipher cipher = Cipher.getInstance("AES");

cipher.init(Cipher.ENCRYPT\_MODE, sks);

// Wrap the output stream

CipherOutputStream cos = new CipherOutputStream(fos, cipher);

// Write bytes

int b;

byte\[\] d = new byte\[8\];

while ((b = fis.read(d)) != -1) \{

cos.write(d, 0, b);

// Flush and close streams.

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\[8\];

while ((b = cis.read(d)) != -1) \{

fos.write(d, 0, b);

fos.flush();

fos.close();

cis.close();

activity\_main.xml

xmlns:tools="http://schemas.android.com/tools"

android:layout\_width="match\_parent"

android:layout\_height="match\_parent"

android:paddingBottom="@dimen/activity\_vertical\_margin"

android:paddingLeft="@dimen/activity\_horizontal\_margin"

android:paddingRight="@dimen/activity\_horizontal\_margin"

android:paddingTop="@dimen/activity\_vertical\_margin"

tools:context=".MainActivity" >

android:id="@+id/main\_encrypt"

android:layout\_width="wrap\_content"

android:layout\_height="wrap\_content"

android:layout\_alignParentTop="true"

android:layout\_centerHorizontal="true"

android:layout\_marginTop="147dp"

android:text="Encrypt" />

android:id="@+id/main\_decrypt"

android:layout\_width="wrap\_content"

android:layout\_height="wrap\_content"

android:layout\_alignRight="@+id/main\_encrypt"

android:layout\_centerVertical="true"

android:text="Decrypt" />

AndroidManifest.xml要添加读取sd的权限

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

android 加解密的速度和什么有关系,android实现视频的加密和解密（使用AES）

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