node-easywechat
Version:
EasyWechat SDK for Node.js (NOT OFFICIAL)
143 lines (142 loc) • 5.07 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
const RSA_1 = __importDefault(require("../Core/Support/RSA"));
const Utils_1 = require("../Core/Support/Utils");
class Utils {
constructor(merchant) {
this.merchant = merchant;
}
/**
* 创建签名（V3），并返回签名字符串
* @param params 参数集合
* @returns
*/
createSignature(message) {
let rsa = new RSA_1.default;
rsa.setPublicKey(this.merchant.getCertificate().toString());
rsa.setPrivateKey(this.merchant.getPrivateKey().toString());
return rsa.sign(message);
}
/**
* 创建签名（V2），并返回签名字符串
* @param params 参数集合
* @returns
*/
createV2Signature(params) {
let signString = '';
let sparator = '';
let keys = Object.keys(params);
keys = keys.sort();
for (let i = 0; i < keys.length; i++) {
if (keys[i] == 'sign' || keys[i] == 'paySign' || typeof params[keys[i]] === undefined || params[keys[i]] === null)
continue;
signString += sparator + keys[i] + '=' + params[keys[i]];
sparator = '&';
}
let key = this.merchant.getV2SecretKey();
if (!key) {
throw new Error('Missing V2 API key.');
}
signString += '&key=' + key;
let sign = '';
let type = params['signType'] ? (params['signType'] + '').toLowerCase() : 'md5';
switch (type) {
case 'sha1':
case 'md5':
sign = (0, Utils_1.createHash)(signString, type);
break;
case 'hmac-sha256':
case 'hmac_sha256':
type = type.replace(/^hmac[\-|_]/i, '');
sign = (0, Utils_1.createHmac)(signString, key, type);
break;
}
if (!sign) {
throw new Error('Failed to sign the request.');
}
return (sign + '').toUpperCase();
}
/**
* 构建JSBridge支付参数
* @see [v3文档](https://pay.weixin.qq.com/wiki/doc/apiv3_partner/apis/chapter4_1_4.shtml)
* @see [v2文档](https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_7&index=6)
* @param prepayId 下单接口返回的prepay_id
* @param appId 应用id
* @param signType v3仅支持RSA，V2支持MD5、HMAC-SHA256
* @returns
*/
buildBridgeConfig(prepayId, appId, signType = 'RSA') {
let params = {
appId,
timeStamp: (0, Utils_1.getTimestamp)(),
nonceStr: (0, Utils_1.randomString)(),
package: 'prepay_id=' + prepayId,
signType,
paySign: '',
};
// v2
if (signType != 'RSA') {
params.paySign = this.createV2Signature(params);
}
// v3
else {
let message = `${params.appId}\n${params.timeStamp}\n${params.nonceStr}\n${params.package}\n`;
params.paySign = this.createSignature(message);
}
return params;
}
/**
* 构建JS-SDK支付参数
* @see https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/JS-SDK.html#58
* @param prepayId 下单接口返回的prepay_id
* @param appId 应用id
* @param signType v3仅支持RSA，V2支持MD5、HMAC-SHA256
*/
buildSdkConfig(prepayId, appId, signType = 'RSA') {
let config = this.buildBridgeConfig(prepayId, appId, signType);
return {
appId: config.appId,
timestamp: config.timeStamp,
nonceStr: config.nonceStr,
package: config.package,
signType: config.signType,
paySign: config.paySign,
};
}
/**
* 构建小程序支付参数
* @see https://developers.weixin.qq.com/miniprogram/dev/api/payment/wx.requestPayment.html
* @param prepayId 下单接口返回的prepay_id
* @param appId 应用id
* @param signType v3仅支持RSA，V2支持MD5、HMAC-SHA256
* @returns
*/
buildMiniAppConfig(prepayId, appId, signType = 'RSA') {
return this.buildBridgeConfig(prepayId, appId, signType);
}
/**
* 构建App支付参数
* @see https://pay.weixin.qq.com/wiki/doc/apiv3_partner/apis/chapter4_2_4.shtml
* @param prepayId 下单接口返回的prepay_id
* @param appId 应用id
* @returns
*/
buildAppConfig(prepayId, appId) {
let params = {
appId,
partnerid: this.merchant.getMerchantId(),
prepayid: prepayId,
nonceStr: (0, Utils_1.randomString)(),
timestamp: (0, Utils_1.getTimestamp)(),
package: 'Sign=WXPay',
sign: '',
};
let message = `${params.appId}\n${params.timestamp}\n${params.nonceStr}\n${params.prepayid}\n`;
params.sign = this.createSignature(message);
return params;
}
}
;
module.exports = Utils;