node-easywechat/dist/Pay/LegacySignature.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"));
class LegacySignature {
    constructor(merchant) {
        this.merchant = merchant;
    }
    /**
     * V2版本的签名计算，并返回带签名字段的参数集合
     * @param params 参数集合
     * @returns
     */
    sign(params) {
        var _a, _b;
        let nonce = (0, Utils_1.randomString)();
        let attributes = (0, merge_1.default)(true, {
            nonce_str: nonce,
            sub_mch_id: (_a = params['sub_mch_id']) !== null && _a !== void 0 ? _a : null,
            sub_appid: (_b = params['sub_appid']) !== null && _b !== void 0 ? _b : null,
        }, params);
        let signString = '';
        let sparator = '';
        let keys = Object.keys(attributes);
        keys = keys.sort();
        for (let i = 0; i < keys.length; i++) {
            if (keys[i] == 'sign' || typeof attributes[keys[i]] === undefined || attributes[keys[i]] === null)
                continue;
            signString += sparator + keys[i] + '=' + attributes[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['sign_type'] ? (params['sign_type'] + '').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.');
        }
        params.sign = (sign + '').toUpperCase();
        return params;
    }
}
module.exports = LegacySignature;