Question

我正在尝试在java中加密/解密文件，并且文件将在另一侧的node.js中解密/加密。

我使用以下命令生成密钥库文件

keytool -genseckey -keystore -storetype jceks -storepass -keyalg AES -keysize 256 -alias -keypass

然后我以base64格式编码密钥并发送给其他方。

在我的java代码中，我不使用base64形式的密钥。我只是从密钥库加载密钥，初始化我的密码并加密文件。

然后我将加密文件发送给其他方。

然而他们无法解密它。同样，如果他们加密它并尝试解密它，我得到BadPaddingException。到底是怎么回事。是因为他们使用base64编码的密钥，我不是吗？其余的所有事情在算法，操作方式上都是一样的。

这是我正在使用的解密功能：

public void decryptFile(InputStream inputStream, OutputStream outputStream)
        throws Exception {
    try {
        long totalread = 0L;
        int nread = 0;
        byte[] inbuf = new byte[128];


        mDecipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

        mInitVec = new byte[16];

        inputStream.read(mInitVec);
        mDecipher.init(2, loadKey(), new IvParameterSpec(mInitVec));


        CipherInputStream cin = new CipherInputStream(inputStream, mDecipher);

        while ((nread = cin.read(inbuf)) > 0) {
            totalread += nread;


            byte[] trimbuf = new byte[nread];

            for (int i = 0; i < nread; i++) {
                trimbuf[i] = inbuf[i];
            }


            outputStream.write(trimbuf);
        }

        outputStream.flush();
    } catch (Exception ex) {
        Logger.getLogger(FileEncryptor.class.getName()).log(Level.SEVERE, null, ex);
        throw ex;
    }
}


And here is the loadKey()

try
    {
      KeyStore keystore = KeyStore.getInstance("JCEKS");
      FileInputStream keystoreStream = new FileInputStream(keyFile);
      keystore.load(keystoreStream, storePassword.toCharArray());
      if (!keystore.containsAlias(keyAlias)) {
        throw new RuntimeException("Alias for key not found");
      }

      KeyStore.ProtectionParameter protParam = new KeyStore.PasswordProtection(keyPassword.toCharArray());

      KeyStore.SecretKeyEntry skEntry = (KeyStore.SecretKeyEntry)keystore.getEntry(keyAlias, protParam);
      SecretKey mySecretKey = skEntry.getSecretKey();
      byte[] enc = new byte['Ā'];
      enc = mySecretKey.getEncoded();
    } catch (Exception e) {
      e.printStackTrace();
      throw new Exception("Error reading key from keystore. Please check if the keystore '" + keyFile + "' exists and is valid."); }
    SecretKey mySecretKey;
    FileInputStream keystoreStream; KeyStore keystore; return mySecretKey;
  }

另一方正在使用node.js，代码是

//String to encrypt 
var plaintext = data.Body; 
//initialisation vector 
var iv = crypto.randomBytes(16); 
//cipher based on provided key and iv 
var cipher = crypto.createCipheriv('aes-256-cbc', key, iv); 
//encrypt the plaintext using aes-256-cbc 
var encrypted = cipher.update(plaintext); 
var finalBuffer = Buffer.concat([encrypted, cipher.final()]); 
//Need to retain IV for decryption, so this can be prepended to the output 
var encryptedbuffer = Buffer.concat([iv, finalBuffer]); 
var encryptedstring = iv.toString() + finalBuffer.toString();

在java和node.js中加密/解密

0 个答案: