node-easywechat/dist/Pay/Signature.js

EasyWechat SDK for Node.js (NOT OFFICIAL)

'use strict';
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
const Utils_1 = require("../Core/Support/Utils");
const merge_1 = __importDefault(require("merge"));
const RSA_1 = __importDefault(require("../Core/Support/RSA"));
class Signature {
    constructor(merchant) {
        this.merchant = merchant;
    }
    /**
     * V3版本的签名计算
     * @param method 请求方式
     * @param url 请求地址
     * @param payload 请求载荷
     * @returns
     */
    createHeader(method, url, payload) {
        let pathname = url;
        if (url.startsWith('https://') || url.startsWith('http://')) {
            let urlObj = new URL(url);
            let search = (0, Utils_1.buildQueryString)((0, merge_1.default)(true, urlObj.searchParams, payload.params));
            pathname = urlObj.pathname + (search ? '?' + search : '');
        }
        let nonce = (0, Utils_1.randomString)();
        let timestamp = (0, Utils_1.getTimestamp)();
        let body = '';
        if (payload.data) {
            if (typeof payload.data === 'object') {
                body = JSON.stringify(payload.data);
            }
            else {
                body = payload.data;
            }
        }
        let signString = `${method.toUpperCase()}\n${pathname}\n${timestamp}\n${nonce}\n${body}`;
        let rsa = new RSA_1.default;
        rsa.setPublicKey(this.merchant.getCertificate().getValue());
        rsa.setPrivateKey(this.merchant.getPrivateKey().getKey());
        let sign = rsa.sign(signString);
        return `WECHATPAY2-SHA256-RSA2048 mchid="${this.merchant.getMerchantId()}",nonce_str="${nonce}",timestamp="${timestamp}",serial_no="${this.merchant.getCertificate().getSerialNo()}",signature="${sign}"`;
    }
}
module.exports = Signature;