获取WiFi MAC地址并使用RC4加密-优快云博客

本文链接：https://blog.youkuaiyun.com/vincent_hika/article/details/9700755

本文介绍了一个用于获取设备WiFi MAC地址的方法，并展示了如何使用RC4算法对MAC地址进行加密。其中包括MD5加密作为辅助手段。文章详细解释了实现过程，包括使用Java编程语言的具体代码实现。

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/** 得到wifi的mac地址

public class DeviceCertification {

public DeviceCertification() {
}

public String getWifiMac(Context mContext) {
  WifiManager wifi = (WifiManager) mContext
    .getSystemService(mContext.WIFI_SERVICE);
  WifiInfo info = wifi.getConnectionInfo();
  String mac = info.getMacAddress();
  return mac;
}
}

// md5 加密

private String MD5Encrypt(String mac) {

  MessageDigest md = null;
  String out = null;
  try {
   md = MessageDigest.getInstance("MD5"); // 可以选择其他算法如SHA
   byte[] digest = md.digest(mac.getBytes());
   out = byteToString(digest);
  } catch (NoSuchAlgorithmException e) {
   e.printStackTrace();
  }

return out;
}

// 将byte数组转化为String

private String byteToString(byte[] digest) {
  StringBuffer out = new StringBuffer();
  String tmp = null;
  for (int i = 0; i < digest.length; i++) {
   tmp = Integer.toHexString(digest[i] & 0xFF);
   if (tmp.length() == 1) {
    out.append("0");
   }
   out.append(tmp);
  }
  return out.toString();
}

RC4加密

//DES、IDEA、RC2、RC4、SKIPJACK、RC5、AES
public class RC4Tool {

// KeyGenerator 提供对称密钥生成器的功能，支持各种算法
// private KeyGenerator keygen;
// SecretKey 负责保存对称密钥
private SecretKey deskey;
// Cipher负责完成加密或解密工作
private Cipher c;
// 该字节数组负责保存加密的结果
private byte[] cipherByte;

private static final String KEY = "xxxx";

public RC4Tool() throws NoSuchAlgorithmException, NoSuchPaddingException {
  // Security.addProvider(new com.sun.crypto.provider.SunJCE());
  // keygen = KeyGenerator.getInstance("RC4");
  // 生成密钥
  // deskey = keygen.generateKey();
  deskey = new SecretKeySpec(KEY.getBytes(), "RC4");
  c = Cipher.getInstance("RC4");

}

/**
* 对字符串加密
*
* @param str
* @return
* @throws InvalidKeyException
* @throws IllegalBlockSizeException
* @throws BadPaddingException
*/
private byte[] Encrytor(String sn) throws InvalidKeyException,
   IllegalBlockSizeException, BadPaddingException {
  // 根据密钥，对Cipher对象进行初始化，ENCRYPT_MODE表示加密模式
  c.init(Cipher.ENCRYPT_MODE, deskey);
  String tmp = sn + generate();
  byte[] src = tmp.getBytes();
  // 加密，结果保存进cipherByte
  cipherByte = c.doFinal(src);
  return cipherByte;
}

/**
* 对字符串解密
*
* @param buff
* @return
* @throws InvalidKeyException
* @throws IllegalBlockSizeException
* @throws BadPaddingException
*/
public byte[] Decryptor(byte[] buff) throws InvalidKeyException,
   IllegalBlockSizeException, BadPaddingException {
  // 根据密钥，对Cipher对象进行初始化，DECRYPT_MODE表示加密模式
  c.init(Cipher.DECRYPT_MODE, deskey);
  cipherByte = c.doFinal(buff);
  return cipherByte;
}

private String generate() {
  long time = System.currentTimeMillis();
  int len = String.valueOf(time).length();
  return String.valueOf(time).substring(0, len);
}

}