火星算法，IAIK JCE，無效密鑰大小

我爲我的程序使用了免費的IAIK-JCE。這裏：火星算法，IAIK JCE，無效密鑰大小

http://javadoc.iaik.tugraz.at/iaik_jce/current/iaik/security/cipher/MARS.html

它說，MARS可以使用從128做到448（32位增量）的密鑰。但是，當我嘗試使用鍵不同勢比128B比我得到：

Caused by: java.security.InvalidKeyException: Illegal key size or default parameters

我的代碼：

public void marsEncryption(Integer dlugoscKlucza, File file, List<User> listaOdbiorcow, ProgressBar pb,String mode) throws NoSuchAlgorithmException, NoSuchProviderException, 
     InvalidKeyException, NoSuchPaddingException, IOException, 
     IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException { 

    //Generowanie klucza 
    SecretKey secretKey = generateMarsSymetricKey(dlugoscKlucza); 

    //inicjalizacja 
    Cipher cipher = Cipher.getInstance("MARS/"+mode+"/PKCS5Padding", "IAIK"); 

    cipher.init(Cipher.ENCRYPT_MODE, secretKey); 

    //Pobranie wektora poczatkowego 
    byte[] ivBytes = cipher.getIV(); 
    IvParameterSpec iv = new IvParameterSpec(ivBytes); 

    //Zamiana klucza na tablice bajtow 
    byte[] KeyBytes = secretKey.getEncoded(); 

    //Zaszyfrowanie klucza symetrycznego kluczem publicznym odbiorcow 
    for (User odbiorca : listaOdbiorcow) { 
     byte[] encryptedKey = rsaEncryption(KeyBytes, odbiorca.publicKey); 
     odbiorca.symetricKey = Base64.encodeBase64String(encryptedKey); 
    } 

    //Zapisanie do pliku xmla 
    XMLFactory.createXML(dlugoscKlucza, ivBytes, listaOdbiorcow, file.toString()); 
    //Szyforwanie pliku 
    String newFile = file.toString() + "Crypt.xml"; 
    encryptTask = new Task<Void>() { 
     @Override 
     protected Void call() throws Exception { 
      FileOutputStream fos = new FileOutputStream(newFile, true); 
      try (FileInputStream fis = new FileInputStream(file.toString())) { 
       byte[] block = new byte[(int) (128)]; 
       double postep = 0; 
       double postepMax = file.length(); 
       updateProgress(0, postepMax); 
       int i; 
       while ((i = fis.read(block)) != -1) { 
        //Szyfrowanie 
        byte[] block2 = cipher.update(block, 0, i); 
        //Zapisanie do pliku 
        postep += i; 
        updateProgress(postep, postepMax); 
        if (isCancelled()) { 
         fis.close(); 
         fos.close(); 
         File f = new File(newFile); 
         f.delete(); 
         updateProgress(0, postepMax); 
         break; 
        } 
        fos.write(block2); 
       } 
       byte[] outputFinalUpdate = cipher.doFinal(); 
       fos.write(outputFinalUpdate); 
       return null; 
      } 
     } 
    }; 
    pb.progressProperty().bind(encryptTask.progressProperty()); 
    new Thread(encryptTask).start(); 
} 
private SecretKey generateMarsSymetricKey(int dlugoscKlucza) throws NoSuchAlgorithmException, NoSuchProviderException { 
    KeyGenerator keyGen = KeyGenerator.getInstance("MARS", "IAIK"); 
    System.out.println("Wybrana długość klucza: " + dlugoscKlucza); 
    keyGen.init(dlugoscKlucza); 
    SecretKey secretKey = keyGen.generateKey(); 
    return secretKey; 
}

它失敗的：

cipher.init(Cipher.ENCRYPT_MODE, secretKey);

有人會說我在做什麼錯？

來源

2016-05-14 Pan Wolodyjowsky

我找到了解決方案。也許有人會在未來有同樣的問題，所以我發佈解決方案：它應該與任何算法。你必須從下載JCE：

http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html

而且在

\Java\jdk1.8.0_45\jre\lib\security

覆蓋文件

來源

2016-05-14 19:08:23

什麼替代呢？ –

火星算法，IAIK JCE，無效密鑰大小

回答

相關問題