作爲項目實施的一部分,我做了以下幾件事: 1. Generete DSA密鑰 2.使用AES加密私鑰 3.保存到文件 4.打開文件並讀取加密的私鑰 5.我試圖將讀取的值轉換爲主鍵格式,但錯誤在這裏。 我在這裏附上上述步驟的代碼:如何將字節數組轉換爲DSA私鑰?
public class Pgm {
public static void main(String[] args) {
try {
KeyPairGenerator dsa = KeyPairGenerator.getInstance("DSA");
SecureRandom random = new SecureRandom();
dsa.initialize(1024, random);
KeyPair keypair = dsa.generateKeyPair();
PrivateKey privateKey = (PrivateKey) keypair.getPrivate();
byte[] key = "�u���1�iw&a".getBytes();
Key aesKey = new SecretKeySpec(key, "AES");
Cipher cipher = Cipher.getInstance("AES");
String currentDir = System.getProperty("user.dir");
// encrypt the text
cipher.init(Cipher.ENCRYPT_MODE, aesKey);
byte[] abc = privateKey.getEncoded();
byte[] encrypted = cipher.doFinal(abc);
// System.out.println("len="+encrypted.length());
File dir=new File(currentDir);
File private_file=new File(dir,"privatekey.txt");
if(!private_file.exists()){
private_file.createNewFile();
}
FileOutputStream fileos = new FileOutputStream(private_file);
ObjectOutputStream objectos = new ObjectOutputStream(fileos);
objectos.writeObject(encrypted);
objectos.close();
fileos.close();
File file_private = new File(dir,"privatekey.txt");
FileInputStream fileo = new FileInputStream(file_private);
ObjectInputStream objos = new ObjectInputStream(fileo);
Object obj = objos.readObject();
byte[] encrypted1= (byte[])obj;
cipher.init(Cipher.DECRYPT_MODE, aesKey);
String decrypted = new String(cipher.doFinal(encrypted1));
if (decrypted.equals(new String(abc)))
System.out.println("true");
else
System.out.println("false");
Signature tosign = Signature.getInstance("DSA");
byte[] val = decrypted.getBytes();
PrivateKey privatekey1 = (PrivateKey)val;
tosign.initSign(privatekey1);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
' PrivateKey privatekey1 = (PrivateKey)val;
顯示錯誤的不可兌換的類型
生成密鑰而不是試圖轉換不兼容的類型。看看'KeyFactory'類。 – EJP 2014-10-30 09:12:16
我應該在stackoverflow中的密碼學或比特幣社區中發佈相同的問題嗎? – user123 2014-11-11 05:48:05