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package cn.wisenergy.service.util;
import cn.wisenergy.model.dto.PayPageDto;
import cn.wisenergy.service.wxpay.WxCommon;
import com.alibaba.fastjson.JSONObject;
import okhttp3.HttpUrl;
import java.io.UnsupportedEncodingException;
import java.security.*;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.util.Base64;
import java.util.UUID;
/**
* @author 86187
*/
public class SignDemo {
public static String getToken(String method, HttpUrl url, String body,String nonceStr,long timestamp) throws UnsupportedEncodingException, SignatureException, NoSuchAlgorithmException, InvalidKeyException, InvalidKeySpecException {
String message = buildMessage(method, url, timestamp, nonceStr, body);
String signature = sign(message.getBytes("utf-8"));
return "mchid=\"" + WxCommon.MCHID + "\","
+ "nonce_str=\"" + nonceStr + "\","
+ "timestamp=\"" + timestamp + "\","
+ "serial_no=\"" + WxCommon.SERIAL_NO + "\","
+ "signature=\"" + signature + "\"";
}
public static String sign(byte[] message) throws NoSuchAlgorithmException, SignatureException, InvalidKeyException, InvalidKeySpecException {
Signature sign = Signature.getInstance("SHA256withRSA");
KeyFactory factory = KeyFactory.getInstance("RSA");
PrivateKey privateKey = factory.generatePrivate(new PKCS8EncodedKeySpec(Base64.getDecoder().decode(WxCommon.SECRET_KEY)));
sign.initSign(privateKey);
sign.update(message);
return Base64.getEncoder().encodeToString(sign.sign());
}
public static String buildMessage(String method, HttpUrl url, long timestamp, String nonceStr, String body) {
String canonicalUrl = url.encodedPath();
if (url.encodedQuery() != null) {
canonicalUrl += "?" + url.encodedQuery();
}
return method + "\n"
+ canonicalUrl + "\n"
+ timestamp + "\n"
+ nonceStr + "\n"
+ body + "\n";
}
// public static void main(String[] args) throws NoSuchAlgorithmException, SignatureException, InvalidKeyException, UnsupportedEncodingException, InvalidKeySpecException {
// String method = "POST";
// HttpUrl httpurl = HttpUrl.parse("https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi");
// long timestamp = System.currentTimeMillis() / 1000;
// String nonceStr = UUID.randomUUID().toString().replace("-", "");
// String url = "v3/pay/transactions/native";
// String tradeNo = "21" + System.currentTimeMillis();
// PayPageDto payPageDto = new PayPageDto();
// payPageDto.setTotal(100);
//
// //构造签名body
// JSONObject jsonObject = new JSONObject();
// jsonObject.put("appid", WxCommon.APP_ID);
// jsonObject.put("mchid", WxCommon.MCHID);
// jsonObject.put("timestamp", timestamp);
// jsonObject.put("nonce_str", nonceStr);
// jsonObject.put("url", url);
// jsonObject.put("method", method);
// jsonObject.put("description", "充值");
// jsonObject.put("out_trade_no", tradeNo);
// jsonObject.put("notify_url", WxCommon.NOTIFY_URL);
// jsonObject.put("amount", payPageDto);
// String sign = getToken(method, httpurl, jsonObject.toJSONString());
// System.out.println("签名：" + sign);
// }
}