com.power.common.util.ApiSignUtil Maven / Gradle / Ivy
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package com.power.common.util;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Formatter;
import java.util.HashMap;
import java.util.Map;
/**
* OpenAPI Signature Generation Tool
*
* Created by yu on 2017/7/27.
*/
public class ApiSignUtil {
/**
* Generate signature
*
* @param appID appid
* @param SECRET secret
* @param nonceStr nonce string
* @return hash map
*/
public static Map sign(String appID, String SECRET, String nonceStr) {
Map ret = new HashMap<>();
long timestamp = System.currentTimeMillis() / 1000L;
String signature = ApiSignUtil.getSignature(appID, SECRET, nonceStr, timestamp);
ret.put("nonceStr", nonceStr);
ret.put("timestamp", timestamp);
ret.put("signature", signature);
ret.put("appId", appID);
return ret;
}
/**
* generates a signature according to the common parameters of the interface generated by the caller
*
* @param appID appid
* @param SECRET secret
* @param nonceStr nonce string
* @param timestamp timestamp of request
* @return string
*/
public static String getSignature(String appID, String SECRET, String nonceStr, long timestamp) {
String string1;
String signature = "";
string1 = "app_id=" + appID + "&app_key" + SECRET + "&noncestr=" + nonceStr
+ "×tamp=" + timestamp;
try {
MessageDigest crypt = MessageDigest.getInstance("SHA-1");
crypt.reset();
crypt.update(string1.getBytes(StandardCharsets.UTF_8));
signature = byteToHex(crypt.digest());
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return signature;
}
/**
* Byte to hex
*
* @param hash byte array
* @return String
*/
private static String byteToHex(final byte[] hash) {
Formatter formatter = new Formatter();
for (byte b : hash) {
formatter.format("%02x", b);
}
String result = formatter.toString();
formatter.close();
return result;
}
}