javax.crypto.IllegalBlockSizeException:解密异常中的最后一个块未完成

我正在尝试在android中解密一个字符串。我一直得到以下例外情况：

08-21 03:56:56.700: W/System.err(4208): javax.crypto.IllegalBlockSizeException: last block incomplete in decryption
08-21 03:56:56.700: W/System.err(4208):     at com.android.org.bouncycastle.jce.provider.JCEBlockCipher.engineDoFinal(JCEBlockCipher.java:697)
08-21 03:56:56.700: W/System.err(4208):     at javax.crypto.Cipher.doFinal(Cipher.java:1106)
08-21 03:56:56.700: W/System.err(4208):     at com.dharani.android.legalplex.BusinessLayer.BLCommonOperations.decrypt(BLCommonOperations.java:284)
08-21 03:56:56.700: W/System.err(4208):     at com.dharani.android.legalplex.BusinessLayer.BLCommonOperations.decryptAndgetFailCountFromPreferences(BLCommonOperations.java:144)
08-21 03:56:56.700: W/System.err(4208):     at com.dharani.android.legalplex.PresentationLayer.TransparentActivity.onCreate(TransparentActivity.java:112)
08-21 03:56:56.700: W/System.err(4208):     at android.app.Activity.performCreate(Activity.java:4465)
08-21 03:56:56.700: W/System.err(4208):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052)
08-21 03:56:56.700: W/System.err(4208):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1932)
08-21 03:56:56.700: W/System.err(4208):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1993)
08-21 03:56:56.700: W/System.err(4208):     at android.app.ActivityThread.access$600(ActivityThread.java:127)
08-21 03:56:56.700: W/System.err(4208):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1159)
08-21 03:56:56.700: W/System.err(4208):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-21 03:56:56.700: W/System.err(4208):     at android.os.Looper.loop(Looper.java:137)
08-21 03:56:56.700: W/System.err(4208):     at android.app.ActivityThread.main(ActivityThread.java:4507)
08-21 03:56:56.700: W/System.err(4208):     at java.lang.reflect.Method.invokeNative(Native Method)
08-21 03:56:56.700: W/System.err(4208):     at java.lang.reflect.Method.invoke(Method.java:511)
08-21 03:56:56.700: W/System.err(4208):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
08-21 03:56:56.700: W/System.err(4208):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
08-21 03:56:56.700: W/System.err(4208):     at dalvik.system.NativeStart.main(Native Method)

加密和解密方法包括：

public  String encrypt(String message) throws Exception
{
    String salt = SharedVariables.globalContext.getString(R.string.EncryptionKey);
    SecretKeySpec key = new SecretKeySpec(salt.getBytes(), "AES");
    Cipher c = Cipher.getInstance("AES");
    c.init(Cipher.ENCRYPT_MODE, key);
    byte[] encVal = c.doFinal(message.getBytes());
    String encrypted=Base64.encodeToString(encVal, Base64.DEFAULT);
    return encrypted;
}

public  String decrypt(String message) throws Exception
{
    String salt = SharedVariables.globalContext.getString(R.string.EncryptionKey);
    Cipher c = Cipher.getInstance("AES");
    SecretKeySpec key = new SecretKeySpec(salt.getBytes(), "AES");
    c.init(Cipher.DECRYPT_MODE, key);
    byte[] decordedValue = Base64.decode(message.getBytes(), Base64.DEFAULT);
    byte[] decValue = c.doFinal(decordedValue);
    String decryptedValue = new String(decValue);
    return decryptedValue;
}

---

salt.getBytes（）

应该是

salt.getBytes（UNICODE\u格式）

我得到了解决方案。下面是适合我的新代码

// Encryption
public  String encrypt(String message) throws Exception
{
    String message1=Base64.encodeBytes(message.getBytes(),Base64.NO_OPTIONS);
    String salt = SharedVariables.globalContext.getString(R.string.EncryptionKey);
    SecretKeySpec key = new SecretKeySpec(salt.getBytes(), "AES");
    Cipher c = Cipher.getInstance("AES");
    c.init(Cipher.ENCRYPT_MODE, key);
    byte[] encVal = c.doFinal(message1.getBytes());
    String encrypted=Base64.encodeToString(encVal, Base64.NO_OPTIONS);
    return encrypted;
}

//Decryption    
public String decrypt(String message) throws Exception
{
    String salt = SharedVariables.globalContext.getString(R.string.EncryptionKey);
    Cipher c = Cipher.getInstance("AES");
    SecretKeySpec key = new SecretKeySpec(salt.getBytes(), "AES");
    c.init(Cipher.DECRYPT_MODE, key);
    byte[] decordedValue = Base64.decode(message.getBytes(), Base64.NO_OPTIONS);
    byte[] decValue = c.doFinal(decordedValue);
    String decryptedValue = new String(decValue);
    String decoded=new String(Base64.decode(decryptedValue,Base64.NO_OPTIONS));
    return decoded;
}

---

当您这样调用时，是否可以提供一些导致此错误的测试数据：

decrypt（encrypt（testData））

。还包括您使用的实际加密密钥值。@很高兴听到您找到了问题的答案。你应该把它作为一个答案，并解释需要改变什么，然后你就可以接受了。这有助于其他用户在将来找到它，并让他们知道什么对你有用。你需要解释你所做的更改，而不仅仅是在没有解释的情况下发布代码。@sravanalakshmi sunkara没有Base64。没有可用的选项：-没有填充，没有包装，没有关闭Only警告：这段代码使用ECB，使用隐藏的默认字符串（“AES”）“AES/ECB/PKCS5P”适用于大多数提供商）。ECB模式不安全。