2

我正在编写一个加密类,以在发送 TCP 数据之前/之后使用密钥加密/解密数据。我在使用我的系统时遇到问题org.apache.commons.codec.binary.Base64。在大多数情况下,我可以看到有人将此与 android studio 相关联,但是,我使用的是 notepad++ 和命令行,但仍然遇到问题。

我已添加commons-codec-1.10.jar到我的项目目录中。我在命令行运行:

javac -cp .;commons-codec-1.10.jar Server.java ... CryptoUtil.java 

我有这个在顶部

import org.apache.commons.codec.binary.Base64;

我的错误是:

CryptoUtil.java:60: error: cannot find symbol
               String encStr = new Base64.encodeBase64String(out);
                                         ^
    symbol: class encodeBase64String
    location: class Base64

CryptoUtil.java:87: error: cannot find symbol
                byte[] enc = new Base64.decodeBase64(encryptedText);
                                       ^
     symbol: class decodeBase64
     location: class Base64
2 errors

还有我的封闭功能:

    public String encrypt(String secretKey, String plainText) 
            throws NoSuchAlgorithmException, 
            InvalidKeySpecException, 
            NoSuchPaddingException, 
            InvalidKeyException,
            InvalidAlgorithmParameterException, 
            UnsupportedEncodingException, 
            IllegalBlockSizeException, 
            BadPaddingException{
        //Key generation for enc and desc
        KeySpec keySpec = new PBEKeySpec(secretKey.toCharArray(), salt, iterationCount);
        SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);        
         // Prepare the parameter to the ciphers
        AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);

        //Enc process
        ecipher = Cipher.getInstance(key.getAlgorithm());
        ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);      
        String charSet="UTF-8";       
        byte[] in = plainText.getBytes(charSet);
        byte[] out = ecipher.doFinal(in);
        String encStr = new Base64.encodeBase64String(out);

        return encStr;
    }

     public String decrypt(String secretKey, String encryptedText)
     throws NoSuchAlgorithmException, 
            InvalidKeySpecException, 
            NoSuchPaddingException, 
            InvalidKeyException,
            InvalidAlgorithmParameterException, 
            UnsupportedEncodingException, 
            IllegalBlockSizeException, 
            BadPaddingException, 
            IOException{
         //Key generation for enc and desc
        KeySpec keySpec = new PBEKeySpec(secretKey.toCharArray(), salt, iterationCount);
        SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);        
         // Prepare the parameter to the ciphers
        AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
        //Decryption process; same key will be used for decr
        dcipher=Cipher.getInstance(key.getAlgorithm());
        dcipher.init(Cipher.DECRYPT_MODE, key,paramSpec);
        byte[] enc = new Base64.decodeBase64(encryptedText);
        byte[] utf8 = dcipher.doFinal(enc);
        String charSet="UTF-8";     
        String plainStr = new String(utf8, charSet);
        return plainStr;
    }    
4

2 回答 2

3

new关键字期望创建一个类型。正如小插入符号指出的那样,()后面应该有括号Base64

然而,Base64是一个static方法的集合,所以如果你new在这种情况下放弃了,你就完成了。

String encStr = Base64.encodeBase64String(out);

应该做的伎俩。

于 2016-03-13T22:40:13.277 回答
1

对于安卓开发者:

编码:使用Base64.encode(yourByteArray,Base64.DEFAULT)

解码:使用Base64.decode(stringData,Base64.DEFAULT)

确保你进口,android.util.Base64

于 2020-01-25T05:05:36.570 回答