线程“main”中的exceptionjava.security.UnrecoverableKeyException：给定最终块未正确填充

大家好我用AES加密，我所做的是我在文本文件中加密数据并存储给定位置，如果在同一个类文件中给出解密工作正常，我创建了一个不同的java类来解密该文件，我使用带有用户名和密码的Javakeystore来存储密钥并检索它并使用存储的密钥进行解密，但是我收到了上述错误。 帮帮我们。 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()); /* * 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(); } } 

错误

  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) 

Answer 1

UnrecoverableKeyException类型标识问题，特别是如果根本原因是"Given final block not properly padded" 。 这基本上意味着您的密码不正确。 KeyStore将首先从给定密码生成密钥，并使用该密钥解密存储的密钥。 如果解密失败，您希望MAC身份validation错误，但在这种情况下，您会收到填充错误（这基本上意味着有人忘记为包含私有密钥的容器添加完整性保护）。

Answer 2

我在第35行找到了问题的答案

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

对于加密，我还设置了密码密码，即密码的填充是pw-password

 Key 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简单逻辑。

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