2014-04-01 142 views
-1

我有以下的密碼(這是已經被加密)和密鑰AES Decrypter的未正確填充

密碼= bbSOvqxMRpO004qYLD/REQ ==

鍵= VUzwYCbBBcEQxu6jvGrwnvAYCD2d7FpQ

以下代碼返回未正確填充 爲解密密碼,我不知道爲什麼。看了幾個例子後,我似乎在跟着他們。

import javax.crypto.Cipher; 
import javax.crypto.spec.SecretKeySpec; 
import org.apache.commons.codec.binary.Base64; 

public abstract class AESDecrypter { 

    public static String decrypt(String encryptedString, String key) { 
     try { 
      SecretKeySpec keySpec = null; 
      Cipher decryptCipher = null; 
      //---- 
      SecretKeySpec keySpec = null; 
     Cipher decryptCipher = null; 
     //---- 
     keySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES"); 
     System.out.println(keySpec.toString()); 
     decryptCipher = Cipher.getInstance("AES"); 
     decryptCipher.init(Cipher.DECRYPT_MODE, keySpec); 
     System.out.println("End decrypt"); 
     return new String(decryptCipher.doFinal(Base64.decodeBase64(encryptedString.getBytes("UTF-8"))), "UTF-8"); 
    } 
} 

回報

Given final block not properly padded 
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 edu.uga.ovpr.decrypter.AESDecrypter.decrypt(AESDecrypter.java:35) 
     at edu.uga.ovpr.filetransferrer.FTPSConnection.<init>(FTPSConnection.java:44) 
     at edu.uga.ovpr.filetransferrer.FileTransferrer.getConnection(FileTransferrer.java:285) 
     at edu.uga.ovpr.filetransferrer.FileTransferrer.doTransfer(FileTransferrer.java:221) 
     at edu.uga.ovpr.filetransferrer.FileTransferrer.main(FileTransferrer.java:128) 
+0

那麼怎麼樣,你不只是吞下異常......我強烈懷疑拋出一個異常,但是你失去了所有的信息。無論如何,您應該很少捕獲「Exception」(更喜歡捕獲特定的異常),並且幾乎不會*僅僅在沒有記錄異常的情況下返回一個值。 ('new String(...)'部分*絕對*不會返回'null'。) –

+0

好的。我已經刪除了try和catch塊。現在,我得到一個 鑑於最終塊未正確填充 javax.crypto.BadPaddingException:鑑於最終塊未正確填充 在com.sun.crypto.provider.SunJCE_f.b(DashoA13 * ..) 在COM .sun.crypto.provider.SunJCE_f.b(DashoA13 * ..) at com.sun.crypto.provider.AESCipher.engineDoFinal(DashoA13 * ..) at javax.crypto.Cipher.doFinal(DashoA13 * ..) at edu.uga.ovpr.decrypter.AESDecrypter.decrypt(AESDecrypter.java:35) – Evilsithgirl

回答