线程“主”中的异常java.security.UnrecoverableKeyException：给定最终块未正确填充 [英] Exception in thread "main" java.security.UnrecoverableKeyException: Given final block not properly padded

问题描述

嗨所有我是usig AES加密，我所做的是我加密了一个文本文件中的数据，并存储给定的位置，解密工作正常，如果在同一个类文件中，我已经创建了一个不同的java类解密文件，我正在使用用户名和密码的Javakeystore来存储密钥并检索它，并使用存储的密钥进行解密，但是我收到上述错误。帮我出柜子这是解密的代码。

  import java.io.File; 
 import java.io.FileInputStream; 
 import java.io.FileOutputStream; 
 import java.security.Key; 
 import java.security.KeyStore; 
 import java.security.Security; 
 
 import javax.crypto.Cipher; 
 import javax.crypto.CipherInputStream; 
 import javax.crypto.KeyGenerator; 
 import javax.crypto.SecretKey; 
 
 import de.flexiprovider.core.FlexiCoreProvider; 
 
 public class Decrypto {
 
 public static void main（String [] args）throws Exception {
 Security.addProvider（new FlexiCoreProvider（））; 
 
 / * 
 *密码cipher1 = Cipher.getInstance（AES128_CBC，FlexiCore）; 
 * KeyGenerator keyGen = KeyGenerator.getInstance（AES，FlexiCore）; 
 * SecretKey secKey = keyGen.generateKey（）; 
 * System.out.println（secKey）; 
 * / 
密码cipher1 = Cipher.getInstance（AES128_CBC，FlexiCore）; 
 KeyStore keyStore = KeyStore.getInstance（JCEKS）; 
 
 FileInputStream fis = new FileInputStream（C：\\\mykey.keystore）; //这里
 //我是
 //上传
 keyStore.load（fis，javaci123.toCharArray（））; 
 fis.close（）; 
 Key secKey =（Key）keyStore.getKey（mySecretKey，
javaci123.toCharArray（））; // line 35 
 
 System.out.println（Found Key：+（secKey））; 
 
 String cleartextFile =C：\\\cleartext.txt; 
 String ciphertextFile =C：\\ciphertextSymm.txt; 
 
 // FileInputStream fis = new FileInputStream（cleartextFile）; 
 FileOutputStream fos = new FileOutputStream（ciphertextFile）; 
 
 String cleartextAgainFile =C：\\\cleartextAgainSymm.txt; 
 
 cipher1.init（Cipher.DECRYPT_MODE，secKey）; 
 fis = new FileInputStream（ciphertextFile）; 
 
 // fis = new FileInputStream（ciphertextFile）; 
 CipherInputStream cis = new CipherInputStream（fis，cipher1）; 
 fos = new FileOutputStream（cleartextAgainFile）; 
 byte [] block = new byte [8]; 
 int i; 
 while（（i = fis.read（block））！= -1）{
 cis.read（block，0，i）; 
} 
 cis.close（）; 
} 
 
} 
  

错误

 线程main中的异常java.security.UnrecoverableKeyException：给定最终块未正确填充
在com.sun.crypto.provider.KeyProtector .com（.com）（$） $ b at darm.code.com.Decrypto.main（Decrypto.java:35）
  

解决方案

我在第35行找到问题的答案

 密钥secKey =（Key）keyStore。 getKey（mySecretKey，
javaci123.toCharArray（））; // line 35 
  

对于加密，我还设置了密码，密码填充为pw-password

 密钥secKey =（Key）keyStore.getKey（mySecretKey，
pw-password .toCharArray（））; // line 35 
  

运行后，我得到保存的密钥来解密我错过的一个简单的逻辑。 p>

找到密钥：*********** 6fd ****** 5 **********

Hi all i am usig AES for encryption, what i have done is i encrypted a data in a text file and and stored the a given location, decryption works fine if given in the same class file, i have created a different java class to decrypt the file, I am using the Javakeystore with username and password to store the keys and retrieve it and use the stored key to decrypt but i am getting the above error. Help me out guys. Here is the code for decryption.

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.security.Key;
import java.security.KeyStore;
import java.security.Security;

import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;

import de.flexiprovider.core.FlexiCoreProvider;

public class Decrypto {

    public static void main(String[] args) throws Exception {
        Security.addProvider(new FlexiCoreProvider());

        /*
         * Cipher cipher1 = Cipher.getInstance("AES128_CBC", "FlexiCore");
         * KeyGenerator keyGen = KeyGenerator.getInstance("AES", "FlexiCore");
         * SecretKey secKey = keyGen.generateKey();
         * System.out.println(secKey);
         */
        Cipher cipher1 = Cipher.getInstance("AES128_CBC", "FlexiCore");
        KeyStore keyStore = KeyStore.getInstance("JCEKS");

        FileInputStream fis = new FileInputStream("C:\\mykey.keystore"); // here
                                                                         // i am
                                                                         // uploading
        keyStore.load(fis, "javaci123".toCharArray());
        fis.close();
        Key secKey = (Key) keyStore.getKey("mySecretKey",
                "javaci123".toCharArray()); // line 35

        System.out.println("Found Key: " + (secKey));

        String cleartextFile = "C:\\cleartext.txt";
        String ciphertextFile = "C:\\ciphertextSymm.txt";

        // FileInputStream fis = new FileInputStream(cleartextFile);
        FileOutputStream fos = new FileOutputStream(ciphertextFile);

        String cleartextAgainFile = "C:\\cleartextAgainSymm.txt";

        cipher1.init(Cipher.DECRYPT_MODE, secKey);
        fis = new FileInputStream(ciphertextFile);

        // fis = new FileInputStream(ciphertextFile);
        CipherInputStream cis = new CipherInputStream(fis, cipher1);
        fos = new FileOutputStream(cleartextAgainFile);
        byte[] block = new byte[8];
        int i;
        while ((i = fis.read(block)) != -1) {
            cis.read(block, 0, i);
        }
        cis.close();
    }

}

error

  Exception in thread "main" java.security.UnrecoverableKeyException: Given final block not     properly padded
   at com.sun.crypto.provider.KeyProtector.unseal(KeyProtector.java:360)
  at com.sun.crypto.provider.JceKeyStore.engineGetKey(JceKeyStore.java:133)
  at java.security.KeyStore.getKey(Unknown Source)
  at darm.code.com.Decrypto.main(Decrypto.java:35)

解决方案

I found the answer for the issue in line 35

Key secKey = (Key) keyStore.getKey("mySecretKey",
        "javaci123".toCharArray()); // line 35

For encryption I had also set a password for the password i.e padding for the password is pw-password

Key secKey = (Key) keyStore.getKey("mySecretKey",
        "pw-password".toCharArray()); // line 35

after running I get the saved key to decrypt a simple logic I missed.

Found Key: ***********6fd******5**********

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