JAVA DES加密输出编码

Question

密钥:thisiskey

要加密的消息:谷歌是一家专门从事互联网相关服务的美国跨国科技公司

加密消息(UTF-8):

mñqè•ÀPŒ�øf"
ߦ\±õ¤ù'È9¢ëyT ÍQEÁ|;ëâÉ÷JWú

Google i,í\O¯‹Ýbº-¸�¬ltinational technology company specializHôJ—=ÊÍnternet-related services

Encrypt Function code:

boolean base64 = true;
key = "thisiskey";
plainText = "Google is an American multinational technology company specializing in Internet-related services";

SecretKeyFactory MyKeyFactory = SecretKeyFactory.getInstance("DES");
byte[] keyBytes = key.getBytes();

DESKeySpec generatedKeySpec = new DESKeySpec(keyBytes);
SecretKey generatedSecretKey = MyKeyFactory.generateSecret(generatedKeySpec);

Cipher generatedCipher = Cipher.getInstance("DES");
generatedCipher.init(Cipher.ENCRYPT_MODE, generatedSecretKey);

byte[] messsageStringBytes = plainText.getBytes();
byte[] encryptedMessage = generatedCipher.doFinal(messsageStringBytes);

String encryptedMessageString = new String(encryptedMessage);

if (base64) {
    encryptedMessageString = Base64.getEncoder().encodeToString(encryptedMessageString.getBytes("utf-8"));
}

return encryptedMessageString;

解密函数代码：

boolean dbase64 = true;
dkey = "thisiskey";
messageToDecrypt = "mñqè•ÀPŒ�øf\"ߦ\±õ¤ù'È9¢ëyT ÍQEÁ|;ëâÉ÷JWú"; // Message from above code

SecretKeyFactory MyKeyFactory = SecretKeyFactory.getInstance("DES");
byte[] dkeyBytes = dkey.getBytes();

DESKeySpec generatedKeySpec = new DESKeySpec(dkeyBytes);
SecretKey generatedSecretKey = MyKeyFactory.generateSecret(generatedKeySpec);

Cipher generatedCipher = Cipher.getInstance("DES");
generatedCipher.init(Cipher.DECRYPT_MODE, generatedSecretKey);

if (dbase64) {
    byte[] decodedBytes = Base64.getDecoder().decode(dencryptedText);
    dencryptedText = new String(decodedBytes, "utf-8");
}

byte[] messsageStringBytes = dencryptedText.getBytes();
byte[] encryptedMessage = generatedCipher.doFinal(messsageStringBytes);

String decryptedMessageString = new String(encryptedMessage);

return decryptedMessageString;

Answer 1

“UTF-8加密消息”没有意义。密文是二进制的，而不是UTF-8。您需要将其放入字节[]中，而不是字符串中。

如果需要字符串，请使用Base64或十六进制编码。

即使在base64编码中，我也无法正确解密。

String encryptedMessageString = new String(encryptedMessage);

if (base64) {
  encryptedMessageString =  Base64.getEncoder().encodeToString(encryptedMessageString.getBytes("utf-8"));
}