javax.crypto.BadPaddingException AES 256 CBC加密

我想在java中使用PKCS5Padding编写AES 256 CBC加密的加密/解密方法。我目前正试图解密来自另一个Base64编码源的加密文本。下面javax.crypto.BadPaddingException AES 256 CBC加密

代码：（这只是测试数据，所以它不是敏感）

// JUnit Test 
    @Test 
    public void testDecrypt() { 
     String cipherText = "rrAwZQCAIj19XauZE6tQEg/HQuWB7gw+1uVO0hylyWyCSJo/y7uB6Xj4BRVi+a3qY9GQ/ahjPdUF/kSHptt6QttkvQf89JS13Mo3mRAnaDK/8uoRur8TDuKzLtCSjaMAg72LqObx04+yLd9hI2krtCaWd2saCLP/cWvTQ9oc1xQ="; 
     String iv = "o1clHzdEkUV4sFj72VwDFQ=="; 
     String syncKey = "gbh7teqqcgyzd65svjgibd7tqy"; 

     SecretKeySpec key = new SecretKeySpec(convertFromBase32(syncKey), "AES"); 
     byte[] cipherBytes = convertFromBase64(cipherText); 
     System.out.println(cipherBytes.length); 
     Encrypted d = Crypto.decrypt(new Encrypted(cipherBytes, key, 
       convertFromBase64(iv))); 
     String decryptedText = new String(d.getCipherText()); 
    } 

// Actual Code 
public static Encrypted decrypt(Encrypted encrypted) { 
     // Initialize the Cipher 
     Cipher cipher = null; 
     IvParameterSpec ivParam = new IvParameterSpec(
       encrypted.getInitializationVector()); 
     try { 
      cipher = Cipher.getInstance(TRANSFORMATION); 
      cipher.init(Cipher.DECRYPT_MODE, encrypted.getSymmetricKey(), 
        ivParam); 
     } catch (NoSuchAlgorithmException e1) { 
      e1.printStackTrace(); 
     } catch (NoSuchPaddingException e1) { 
      e1.printStackTrace(); 
     } catch (InvalidKeyException e) { 
      e.printStackTrace(); 
     } catch (InvalidAlgorithmParameterException e) { 
      e.printStackTrace(); 
     } 

     byte[] outputBytes = cryptCommon(cipher, encrypted.getCipherText()); 
     Encrypted decrypted = new Encrypted(outputBytes, 
       encrypted.getSymmetricKey(), cipher.getIV()); 
     return decrypted; 
    } 

    private static byte[] cryptCommon(Cipher cipher, byte[] inputBytes) { 
     byte[] outputBytes = null; 
     try { 
      outputBytes = cipher.doFinal(inputBytes); 
     } catch (IllegalBlockSizeException e) { 
      e.printStackTrace(); 
     } catch (BadPaddingException e) { 
      e.printStackTrace(); 
     } 
     return outputBytes; 
    }

的我已经检查字节[]的长度从Base64的解码后和它们长度的整除按块大小（对于16字节块大小，为128字节）。

这里是堆栈跟踪我越来越：

javax.crypto.BadPaddingException: Given final block not properly padded 
    at com.sun.crypto.provider.SunJCE_f.b(DashoA13*..) 
    at com.sun.crypto.provider.SunJCE_f.b(DashoA13*..) 
    at com.sun.crypto.provider.AESCipher.engineDoFinal(DashoA13*..) 
    at javax.crypto.Cipher.doFinal(DashoA13*..) 
    at com.mozilla.android.sync.Crypto.cryptCommon(Crypto.java:77) 
    at com.mozilla.android.sync.Crypto.decrypt(Crypto.java:69) 
    at com.mozilla.android.sync.test.CryptoTests.testDecrypt(CryptoTests.java:71) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) 
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) 
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) 
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) 
    at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79) 
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71) 
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49) 
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193) 
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52) 
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191) 
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42) 
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184) 
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236) 
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) 
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

任何帮助深表感谢。谢谢！

来源

2011-10-22 jvoll

'TRANSFORMATION'的价值是什么？ –

对不起，变形=“AES/CBC/PKCS5Padding” – jvoll

在密码学中，一切都必须准确无误。你是否将加密和解密方法都设置为PKCS5填充？你是否检查过加密方法产生的字节与解密函数消耗的字节是否完全一致？

你检查过两个键是否完全匹配，字节是字节吗？您在一点使用Base32，这有点不寻常。

我建议将测试划分为更小的部分，这样您可以明确检查每个参数的匹配情况，以进行加密和解密。确保你检查每个参数为一个字节数组，即不涉及从Base64或其他任何的转换。

来源

2011-10-26 21:04:14 rossum

是的，这个错误最终与你在这里所说的类似。糟糕！ – jvoll

javax.crypto.BadPaddingException AES 256 CBC加密

回答

相关问题