Android 加密/解密音频文件(AES) Android java.security.NoSuchProviderException: no such provider: Crypto

原文地址：https://blog.csdn.net/u012964281/article/details/41787857

加密过程：以byte[]形式读取SD卡上准备好的测试音频文件，使用AES加密算法加密byte[]，再保存覆盖原音频文件，此时加密后的音频文件无法被播放。解密和加密过程原理一样，解密保存后的音频文件可以被播放。

代码：

VoiceEncryptionActivity.java

[java]  view plain  copy

1. package com.example.voiceencryption;  
2.   
3. import java.io.File;  
4. import java.io.FileInputStream;  
5. import java.io.FileNotFoundException;  
6. import java.io.FileOutputStream;  
7. import java.io.IOException;  
8.   
9. import android.app.Activity;  
10. import android.media.MediaPlayer;  
11. import android.os.Bundle;  
12. import android.os.Environment;  
13. import android.util.Log;  
14. import android.view.View;  
15. import android.view.View.OnClickListener;  
16. import android.widget.Button;  
17. import android.widget.Toast;  
18.   
19. public class VoiceEncryptionActivity extends Activity implements  
20.         OnClickListener {  
21.     private static final String TAG = "VoiceEncryptionActivity";  
22.     private static final String seed = "guess"; // 种子  
23.     private MediaPlayer mPlayer;  
24.     private Button mPlayButton;  
25.     private Button mEncryptionButton;  
26.     private Button mDecryptionButton;  
27.     private File sdCard = Environment.getExternalStorageDirectory();  
28.     private File oldFile = new File(sdCard, "recording_old.3gpp");  
29.     // 音频文件的路径，在res\raw\recording_old.3gpp中找到音频文件，再放到外部存储的根目录下。用于测试  
30.     private FileInputStream fis = null;  
31.     private FileOutputStream fos = null;  
32.   
33.     @Override  
34.     protected void onCreate(Bundle savedInstanceState) {  
35.         super.onCreate(savedInstanceState);  
36.         setContentView(R.layout.activity_voice_encryption);  
37.         mPlayButton = (Button) findViewById(R.id.playButton);  
38.         mPlayButton.setOnClickListener(this);  
39.         mEncryptionButton = (Button) findViewById(R.id.encryptionButton);  
40.         mEncryptionButton.setOnClickListener(this);  
41.         mDecryptionButton = (Button) findViewById(R.id.decryptionButton);  
42.         mDecryptionButton.setOnClickListener(this);  
43.   
44.     }  
45.   
46.     @SuppressWarnings("static-access")  
47.     @Override  
48.     public void onClick(View v) {  
49.         switch (v.getId()) {  
50.         case R.id.playButton:  
51.             if (mPlayer != null) {  
52.                 mPlayer.release();  
53.                 mPlayer = null;  
54.             }  
55.             // mPlayer = MediaPlayer.create(this, R.raw.recording_old);  
56.             boolean isSuccess = true;  
57.             try {  
58.                 fis = new FileInputStream(oldFile);  
59.                 mPlayer = new MediaPlayer();  
60.                 mPlayer.setDataSource(fis.getFD());  
61.                 mPlayer.prepare(); // 去掉会出错  
62.                 mPlayer.start();  
63.             } catch (FileNotFoundException e) {  
64.                 isSuccess = false;  
65.                 e.printStackTrace();  
66.             } catch (IllegalArgumentException e) {  
67.                 isSuccess = false;  
68.                 e.printStackTrace();  
69.             } catch (IllegalStateException e) {  
70.                 isSuccess = false;  
71.                 e.printStackTrace();  
72.             } catch (IOException e) {  
73.                 isSuccess = false;  
74.                 e.printStackTrace();  
75.             } finally {  
76.                 try {  
77.                     fis.close();  
78.                 } catch (IOException e) {  
79.                     e.printStackTrace();  
80.                 }  
81.             }  
82.             if (!isSuccess)  
83.                 Toast.makeText(this, "播放失败", Toast.LENGTH_SHORT).show();  
84.             break;  
85.   
86.         case R.id.encryptionButton:  
87.             // 加密保存  
88.             isSuccess = true;  
89.             try {  
90.                 fis = new FileInputStream(oldFile);  
91.                 byte[] oldByte = new byte[(int) oldFile.length()];  
92.                 fis.read(oldByte); // 读取  
93.                 byte[] newByte = AESUtils.encryptVoice(seed, oldByte);  
94.                 // 加密  
95.                 fos = new FileOutputStream(oldFile);  
96.                 fos.write(newByte);  
97.   
98.             } catch (FileNotFoundException e) {  
99.                 isSuccess = false;  
100.                 e.printStackTrace();  
101.             } catch (IOException e) {  
102.                 isSuccess = false;  
103.                 e.printStackTrace();  
104.             } catch (Exception e) {  
105.                 isSuccess = false;  
106.                 e.printStackTrace();  
107.             } finally {  
108.                 try {  
109.                     fis.close();  
110.                     fos.close();  
111.                 } catch (IOException e) {  
112.                     e.printStackTrace();  
113.                 }  
114.             }  
115.             if (isSuccess)  
116.                 Toast.makeText(this, "加密成功", Toast.LENGTH_SHORT).show();  
117.             else  
118.                 Toast.makeText(this, "加密失败", Toast.LENGTH_SHORT).show();  
119.   
120.             Log.i(TAG, "保存成功");  
121.             break;  
122.   
123.         case R.id.decryptionButton:  
124.             // 解密保存  
125.             isSuccess = true;  
126.             byte[] oldByte = new byte[(int) oldFile.length()];  
127.             try {  
128.                 fis = new FileInputStream(oldFile);  
129.                 fis.read(oldByte);  
130.                 byte[] newByte = AESUtils.decryptVoice(seed, oldByte);  
131.                 // 解密  
132.                 fos = new FileOutputStream(oldFile);  
133.                 fos.write(newByte);  
134.   
135.             } catch (FileNotFoundException e) {  
136.                 isSuccess = false;  
137.                 e.printStackTrace();  
138.             } catch (IOException e) {  
139.                 isSuccess = false;  
140.                 e.printStackTrace();  
141.             } catch (Exception e) {  
142.                 isSuccess = false;  
143.                 e.printStackTrace();  
144.             }  
145.             try {  
146.                 fis.close();  
147.                 fos.close();  
148.             } catch (IOException e) {  
149.                 e.printStackTrace();  
150.             }  
151.             if (isSuccess)  
152.                 Toast.makeText(this, "解密成功", Toast.LENGTH_SHORT).show();  
153.             else  
154.                 Toast.makeText(this, "解密失败", Toast.LENGTH_SHORT).show();  
155.             break;  
156.   
157.         default:  
158.             break;  
159.         }  
160.   
161.     }  
162. }  

AESUtils.java

[java]  view plain  copy

1. package com.example.voiceencryption;  
2.   
3. import java.security.SecureRandom;  
4.   
5. import javax.crypto.Cipher;  
6. import javax.crypto.KeyGenerator;  
7. import javax.crypto.SecretKey;  
8. import javax.crypto.spec.IvParameterSpec;  
9. import javax.crypto.spec.SecretKeySpec;  
10.   
11. public class AESUtils {  
12.     public static byte[] encryptVoice(String seed, byte[] clearbyte)  
13.             throws Exception {  
14.         byte[] rawKey = getRawKey(seed.getBytes());  
15.         byte[] result = encrypt(rawKey, clearbyte);  
16.         return result;  
17.     }  
18.   
19.     public static byte[] decryptVoice(String seed, byte[] encrypted)  
20.             throws Exception {  
21.         byte[] rawKey = getRawKey(seed.getBytes());  
22.         byte[] result = decrypt(rawKey, encrypted);  
23.         return result;  
24.     }  
25.   
26.     private static byte[] getRawKey(byte[] seed) throws Exception {  
27.         KeyGenerator kgen = KeyGenerator.getInstance("AES");  
28.         SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", new CryptoProvider());  
29.         sr.setSeed(seed);  
30.         kgen.init(128, sr);  
31.         SecretKey skey = kgen.generateKey();  
32.         byte[] raw = skey.getEncoded();  
33.         return raw;  
34.     }  
35.   
36.     private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {  
37.         SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");  
38.         Cipher cipher = Cipher.getInstance("AES");  
39.         cipher.init(Cipher.ENCRYPT_MODE, skeySpec, new IvParameterSpec(  
40.                 new byte[cipher.getBlockSize()]));  
41.         byte[] encrypted = cipher.doFinal(clear);  
42.         return encrypted;  
43.     }  
44.   
45.     private static byte[] decrypt(byte[] raw, byte[] encrypted)  
46.             throws Exception {  
47.         SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");  
48.         Cipher cipher = Cipher.getInstance("AES");  
49.         cipher.init(Cipher.DECRYPT_MODE, skeySpec, new IvParameterSpec(  
50.                 new byte[cipher.getBlockSize()]));  
51.         byte[] decrypted = cipher.doFinal(encrypted);  
52.         return decrypted;  
53.     }  
54. }  

CryptoProvider.java

import java.security.Provider;

/**
 * Created by xxx on 2018/6/1.
 */

public class CryptoProvider extends Provider {

    /**
     * Creates a Provider and puts parameters
     */
    public CryptoProvider() {
        super("Crypto", 1.0, "HARMONY (SHA1 digest; SecureRandom; SHA1withDSA signature)");
        put("SecureRandom.SHA1PRNG",
                "org.apache.harmony.security.provider.crypto.SHA1PRNG_SecureRandomImpl");
        put("SecureRandom.SHA1PRNG ImplementedIn", "Software");
    }
}

原方法存在兼容性问题，已修改好，采用方式如下文：

Android java.security.NoSuchProviderException: no such provider: Crypto

https://blog.csdn.net/dodod2012/article/details/80540926

源码：http://download.csdn.net/detail/u012964281/8233079