package ericzz.utils;

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

import javax.crypto.Mac;

import javax.crypto.spec.SecretKeySpec;

/**

*

*  GrowingIO API 认证工具类

* 
* @author zz_huns
 

*  @version Id: GrowingUtil.java, v 0.1 2019/9/16 8:18 PM zz_huns Exp $$

*

*/

public class GrowingUtil {

/**

* growingIO api 认证 auth 计算

* @param gioPrivateSecret gio私钥

* @param gioUid gio项目UID

* @param id gio项目ID

* @param tm 当前时间戳(注意，tm不能取当前时间戳)

* @return

* @throws Exception

*/

public static String authToken(String gioPrivateSecret, String gioUid, String id, Long tm) throws Exception {

String message = "POST\n/auth/token\nproject="+gioUid+"&ai="+id+"&tm="+tm;

Mac hmac = Mac.getInstance("HmacSHA256");

hmac.init(new SecretKeySpec(gioPrivateSecret.getBytes("UTF-8"), "HmacSHA256"));

byte[] signature = hmac.doFinal(message.getBytes("UTF-8"));

return Hex.encodeHexString(signature);

}

}