启用RSA的简单Java聊天-不是PKCS#1阻止类型2或零填充

Question

我创建了一个简单的java聊天应用程序。以下是以下内容

当我尝试解密时，我得到“not PKCS#1 block type 2 or Zero padding”异常

public static byte[] encrypt(String text, PublicKey key) throws {
    // get an RSA cipher object and print the provider
    final Cipher cipher = Cipher.getInstance(ALGORITHM);
    // encrypt the plain text using the public key
    cipher.init(Cipher.ENCRYPT_MODE, key);
    byte[] cipherText = cipher.doFinal(text.getBytes("UTF8"));
    return org.apache.commons.codec.binary.Base64.encodeBase64(cipherText);
}

public static String decrypt(String text, PrivateKey key) throws  {
    byte[] dectyptedText = null;

      // get an RSA cipher object and print the provider
      final Cipher cipher = Cipher.getInstance(ALGORITHM);

      // decrypt the text using the private key
     cipher.init(Cipher.DECRYPT_MODE, key);
     byte[] byteCipherText =org.apache.commons.codec.binary.Base64.decodeBase64(text): 
     byte[] cipherData = cipher.doFinal(byteCipherText);
     return new String(dectyptedText);  
}

private void btnDecryptActionPerformed(ActionEvent evt) throws  {
    String name11 = this.getTitle();
    String test90 = null;
    String PRIVATE_KEY_FILE = "C:/keys/"+name11+"/private.key";
    BufferedReader in = null;
    try {
        in = new BufferedReader(new FileReader("cipher.txt"));
    } catch (FileNotFoundException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
    try {
        while(in.ready())
        {
            String stest= in.readLine();
            test90 = stest;


        }
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }

    ObjectInputStream inputStream = null;
    try {
    inputStream = new ObjectInputStream(new FileInputStream(PRIVATE_KEY_FILE));
    } catch (FileNotFoundException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
    PrivateKey privateKey = null;
    try {
        privateKey = (PrivateKey) inputStream.readObject();
    } catch (ClassNotFoundException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
    try {
    inputStream = new ObjectInputStream(new FileInputStream(PRIVATE_KEY_FILE));
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    try {
        PrivateKey privatekey = (PrivateKey) inputStream.readObject();
    } catch (ClassNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } 
    String plainText;

//  byte[] test100 = test90.getBytes();
//  out.println(test100);
    plainText = decrypt(test90, privateKey); (Getting Error Here)
    decryptText.append(plainText);
} 

Answer 1

下面突出显示的代码表示test90只包含cipher.txt文件中的最后一行。cipher.txt只包含1行吗？如果你想把每一行都读进去，你需要在读进去的时候把每一行串联起来。

while(in.ready())
{
    String stest= in.readLine();
    test90 = stest;
}

在decrypt方法中system.out变量test90也是一个好主意，以确保您得到的是要解密的预期base64数据。