如何添加PBKDF2WithHmacSHA1 for android api 8（Froyo）

Question

我需要一些幫助。我正在編寫應用程序，需要使用「PBKDF2WithHmacSHA1」算法（不能更改服務器端）。但這不工作在Android（不支持），但後來我在eclipse中創建android-maven項目，它在薑餅和最新的工作正常。但在Froyo不。我嘗試添加具有該算法但沒有任何內容的安全提供程序我可以在avaylable列表中看到它，但無法獲取它的實例。我的事件嘗試spoungycastle（重新編譯的bouncecastle），SunJCE。也許你有同樣的建議如何解決它？ o一些workaroud？

在這一行

我得到錯誤

SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1"); 

錯誤：

W/System.err(1225): java.security.NoSuchAlgorithmException: SecretKeyFactory PBKDF2WithHmacSHA1 implementation not found: 
W/System.err(1225): at java.security.Provider$Service.newInstance(Provider.java:1100) 
W/System.err(1225): at org.apache.harmony.security.fortress.Engine.getInstance(Engine.java:112) 
W/System.err(1225): at javax.crypto.SecretKeyFactory.getInstance(SecretKeyFactory.java:111) 
W/System.err(1225): at com.ii.app.AppActivity.onCreate(AppActivity.java:46) 
W/System.err(1225): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
W/System.err(1225): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
W/System.err(1225): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
W/System.err(1225): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
W/System.err(1225): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
W/System.err(1225): at android.os.Handler.dispatchMessage(Handler.java:99) 
W/System.err(1225): at android.os.Looper.loop(Looper.java:123) 
W/System.err(1225): at android.app.ActivityThread.main(ActivityThread.java:4627) 
W/System.err(1225): at java.lang.reflect.Method.invokeNative(Native Method) 
W/System.err(1225): at java.lang.reflect.Method.invoke(Method.java:521) 
W/System.err(1225): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
W/System.err(1225): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
W/System.err(1225): at dalvik.system.NativeStart.main(Native Method) 
W/System.err(1225): Caused by: java.lang.NullPointerException 
W/System.err(1225): at com.sun.crypto.provider.SunJCE$2.run(DashoA13*..) 
W/System.err(1225): at java.security.AccessController.doPrivilegedImpl(AccessController.java:264) 
W/System.err(1225): at java.security.AccessController.doPrivileged(AccessController.java:84) 
W/System.err(1225): at com.sun.crypto.provider.SunJCE.c(DashoA13*..) 
W/System.err(1225): at com.sun.crypto.provider.SunJCE.b(DashoA13*..) 
W/System.err(1225): at com.sun.crypto.provider.PBKDF2HmacSHA1Factory.<init>(DashoA13*..) 
W/System.err(1225): at java.lang.Class.newInstanceImpl(Native Method) 
W/System.err(1225): at java.lang.Class.newInstance(Class.java:1429) 
W/System.err(1225): at java.security.Provider$Service.newInstance(Provider.java:1098) 
W/System.err(1225): ... 16 more 

Answer 1

Spongycastle的作品，但它不是直線前進。你必須這樣做：

private static byte[] decryptPBKDF2WithBC(char[] password, byte[] data, byte[] salt, byte[] iv) 
    throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, InvalidKeyException, 
    InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException { 

    PBEParametersGenerator generator = new PKCS5S2ParametersGenerator(); 
    generator.init(PBEParametersGenerator.PKCS5PasswordToUTF8Bytes(password), salt,CryptographicToolBox.CRYPTO_ITERATIONS); 
    KeyParameter params = (KeyParameter)generator.generateDerivedParameters(CryptographicToolBox.KEY_SIZE); 

    byte[] endcoded = params.getKey(); 
    SecretKey key = new SecretKeySpec(endcoded, "AES"); 

    Cipher ciph = Cipher.getInstance("AES/CBC/PKCS5Padding"); 

    ciph.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv); 
    return ciph.doFinal(data); 
}