生成隨機字符串函數 len傳入位數
randomString: function (len) { /*32位隨機數*/
len = len || 32;
var $chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678'; /*默認去掉了容易混淆的字符oOLl,9gq,Vv,Uu,I1*/
var maxPos = $chars.length;
var pwd = '';
for (var i = 0; i < len; i++) {
pwd += $chars.charAt(Math.floor(Math.random() * maxPos));
}
return pwd;
},
前提：注意事項
1.簽名算法入坑點
- 字符串拼接順序，按照參數名ASCII碼從小到大排序
- 注意參數大小寫，兩次簽名appid和appId
- 參數值爲空不參與簽名
2.body格式：騰訊充值中心-QQ會員充值
3.total_fee金額，1:100,100塊東西傳10000
4.所有的加密算法都要在後端進行，商戶號跟商戶號祕鑰不易在前臺進行傳遞，以免被不法分子利用，造成經濟損失
正文：
sign簽名算法注意事項，空值不參與簽名，其他用到的參數都按順序拼在一起：
簽名：生成sign
const appid = appid;
const body = body;
const nonce_str = nonce_str;
const notify_url = notify_url;
const openid = openid;
const out_trade_no = out_trade_no;
const spbill_create_ip = spbill_create_ip;
const total_fee = total_fee;
const trade_type = trade_type;
const store_key = store_key;
const Mch_id = Mch_id;
const Mch_key = Mch_key;
const stringA = "appid=" + appid
+ "&body=" + body
+ "&mch_id=" + Mch_id
+ "&nonce_str=" + nonce_str
+ "¬ify_url=" + notify_url
+ "&openid=" + openid
+ "&out_trade_no=" + out_trade_no
+ "&spbill_create_ip=" + spbill_create_ip
+ "&total_fee=" + total_fee
+ "&trade_type=" + trade_type;
const stringSignTemp = stringA + "&key=" + Mch_key;
const sign = utilMd5.hexMD5(stringSignTemp).toUpperCase(); //md5加密 toUpperCase()變大寫
拼接成xml格式
const bodyData = '<xml>';
bodyData += '<appid>' + appid + '</appid>'; // 小程序ID
bodyData += '<body>' + body + '</body>'; // 商品描述
bodyData += '<mch_id>' + Mch_id + '</mch_id>'; // 商戶號
bodyData += '<nonce_str>' + nonce_str + '</nonce_str>'; // 隨機字符串
bodyData += '<notify_url>' + notify_url + '</notify_url>'; // 支付成功的回調地址
bodyData += '<openid>' + openid + '</openid>'; // 用戶標識
bodyData += '<out_trade_no>' + out_trade_no + '</out_trade_no>'; // 商戶訂單號
bodyData += '<spbill_create_ip>' + spbill_create_ip + '</spbill_create_ip>'; // 終端IP
bodyData += '<total_fee>' + total_fee + '</total_fee>'; // 總金額 單位爲分
bodyData += '<trade_type>' + trade_type + '</trade_type>'; // 交易類型 小程序取值如下：JSAPI
// 簽名
bodyData += '<sign>' + sign + '</sign>';
bodyData += '</xml>';
統一下單：
wx.request({
url: 'https://api.mch.weixin.qq.com/pay/unifiedorder', //僅爲示例，並非真實的接口地址
method:'POST',
data:bodyData,
header: {
'content-type': 'application/json;charset=UTF-8' // 默認值
},
success: function (res) {
console.log(res)
}
})
成功後返回xml格式數據：
把裏面數據取出來接着加密，這裏需要注意參數的大小寫appId
const stringB = "appId=" + appid
+ "&nonceStr=" + nonce_str
+ "&package=" + "prepay_id=" + prepay_id
+ "&signType=MD5"
+ "&timeStamp=" + String(timeStamp);
const stringSignTempB = stringB + "&key=" + Mch_key;
const paySign = utilMd5.hexMD5(stringSignTempB).toUpperCase();
調起微信支付
wx.requestPayment({
'timeStamp': timestamp,
'nonceStr': nonceStr,
'package': "prepay_id=" + prepayId,
'signType': 'MD5',
'paySign': sign,
'success': function (res) {},
'fail': function (res) {},
'complete': function (res) { }
})
小程序md5加密，支持中文md5加密
function safe_add(x, y) {
var lsw = (x & 0xFFFF) + (y & 0xFFFF)
var msw = (x >> 16) + (y >> 16) + (lsw >> 16)
return (msw << 16) | (lsw & 0xFFFF)
}
function rol(num, cnt) {
return (num << cnt) | (num >>> (32 - cnt))
}
function cmn(q, a, b, x, s, t) {
return safe_add(rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b)
}
function ff(a, b, c, d, x, s, t) {
return cmn((b & c) | ((~b) & d), a, b, x, s, t)
}
function gg(a, b, c, d, x, s, t) {
return cmn((b & d) | (c & (~d)), a, b, x, s, t)
}
function hh(a, b, c, d, x, s, t) {
return cmn(b ^ c ^ d, a, b, x, s, t)
}
function ii(a, b, c, d, x, s, t) {
return cmn(c ^ (b | (~d)), a, b, x, s, t)
}
function coreMD5(x) {
var a = 1732584193
var b = -271733879
var c = -1732584194
var d = 271733878
for (var i = 0; i < x.length; i += 16) {
var olda = a
var oldb = b
var oldc = c
var oldd = d
a = ff(a, b, c, d, x[i + 0], 7, -680876936)
d = ff(d, a, b, c, x[i + 1], 12, -389564586)
c = ff(c, d, a, b, x[i + 2], 17, 606105819)
b = ff(b, c, d, a, x[i + 3], 22, -1044525330)
a = ff(a, b, c, d, x[i + 4], 7, -176418897)
d = ff(d, a, b, c, x[i + 5], 12, 1200080426)
c = ff(c, d, a, b, x[i + 6], 17, -1473231341)
b = ff(b, c, d, a, x[i + 7], 22, -45705983)
a = ff(a, b, c, d, x[i + 8], 7, 1770035416)
d = ff(d, a, b, c, x[i + 9], 12, -1958414417)
c = ff(c, d, a, b, x[i + 10], 17, -42063)
b = ff(b, c, d, a, x[i + 11], 22, -1990404162)
a = ff(a, b, c, d, x[i + 12], 7, 1804603682)
d = ff(d, a, b, c, x[i + 13], 12, -40341101)
c = ff(c, d, a, b, x[i + 14], 17, -1502002290)
b = ff(b, c, d, a, x[i + 15], 22, 1236535329)
a = gg(a, b, c, d, x[i + 1], 5, -165796510)
d = gg(d, a, b, c, x[i + 6], 9, -1069501632)
c = gg(c, d, a, b, x[i + 11], 14, 643717713)
b = gg(b, c, d, a, x[i + 0], 20, -373897302)
a = gg(a, b, c, d, x[i + 5], 5, -701558691)
d = gg(d, a, b, c, x[i + 10], 9, 38016083)
c = gg(c, d, a, b, x[i + 15], 14, -660478335)
b = gg(b, c, d, a, x[i + 4], 20, -405537848)
a = gg(a, b, c, d, x[i + 9], 5, 568446438)
d = gg(d, a, b, c, x[i + 14], 9, -1019803690)
c = gg(c, d, a, b, x[i + 3], 14, -187363961)
b = gg(b, c, d, a, x[i + 8], 20, 1163531501)
a = gg(a, b, c, d, x[i + 13], 5, -1444681467)
d = gg(d, a, b, c, x[i + 2], 9, -51403784)
c = gg(c, d, a, b, x[i + 7], 14, 1735328473)
b = gg(b, c, d, a, x[i + 12], 20, -1926607734)
a = hh(a, b, c, d, x[i + 5], 4, -378558)
d = hh(d, a, b, c, x[i + 8], 11, -2022574463)
c = hh(c, d, a, b, x[i + 11], 16, 1839030562)
b = hh(b, c, d, a, x[i + 14], 23, -35309556)
a = hh(a, b, c, d, x[i + 1], 4, -1530992060)
d = hh(d, a, b, c, x[i + 4], 11, 1272893353)
c = hh(c, d, a, b, x[i + 7], 16, -155497632)
b = hh(b, c, d, a, x[i + 10], 23, -1094730640)
a = hh(a, b, c, d, x[i + 13], 4, 681279174)
d = hh(d, a, b, c, x[i + 0], 11, -358537222)
c = hh(c, d, a, b, x[i + 3], 16, -722521979)
b = hh(b, c, d, a, x[i + 6], 23, 76029189)
a = hh(a, b, c, d, x[i + 9], 4, -640364487)
d = hh(d, a, b, c, x[i + 12], 11, -421815835)
c = hh(c, d, a, b, x[i + 15], 16, 530742520)
b = hh(b, c, d, a, x[i + 2], 23, -995338651)
a = ii(a, b, c, d, x[i + 0], 6, -198630844)
d = ii(d, a, b, c, x[i + 7], 10, 1126891415)
c = ii(c, d, a, b, x[i + 14], 15, -1416354905)
b = ii(b, c, d, a, x[i + 5], 21, -57434055)
a = ii(a, b, c, d, x[i + 12], 6, 1700485571)
d = ii(d, a, b, c, x[i + 3], 10, -1894986606)
c = ii(c, d, a, b, x[i + 10], 15, -1051523)
b = ii(b, c, d, a, x[i + 1], 21, -2054922799)
a = ii(a, b, c, d, x[i + 8], 6, 1873313359)
d = ii(d, a, b, c, x[i + 15], 10, -30611744)
c = ii(c, d, a, b, x[i + 6], 15, -1560198380)
b = ii(b, c, d, a, x[i + 13], 21, 1309151649)
a = ii(a, b, c, d, x[i + 4], 6, -145523070)
d = ii(d, a, b, c, x[i + 11], 10, -1120210379)
c = ii(c, d, a, b, x[i + 2], 15, 718787259)
b = ii(b, c, d, a, x[i + 9], 21, -343485551)
a = safe_add(a, olda)
b = safe_add(b, oldb)
c = safe_add(c, oldc)
d = safe_add(d, oldd)
}
return [a, b, c, d]
}
function binl2hex(binarray) {
var hex_tab = "0123456789abcdef"
var str = ""
for (var i = 0; i < binarray.length * 4; i++) {
str += hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8 + 4)) & 0xF) +
hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8)) & 0xF)
}
return str
}
function binl2b64(binarray) {
var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
var str = ""
for (var i = 0; i < binarray.length * 32; i += 6) {
str += tab.charAt(((binarray[i >> 5] << (i % 32)) & 0x3F) |
((binarray[i >> 5 + 1] >> (32 - i % 32)) & 0x3F))
}
return str
}
function str2binl(str) {
var nblk = ((str.length + 8) >> 6) + 1
var blks = new Array(nblk * 16)
for (var i = 0; i < nblk * 16; i++) blks[i] = 0
for (var i = 0; i < str.length; i++)
blks[i >> 2] |= (str.charCodeAt(i) & 0xFF) << ((i % 4) * 8)
blks[i >> 2] |= 0x80 << ((i % 4) * 8)
blks[nblk * 16 - 2] = str.length * 8
return blks
}
function strw2binl(str) {
var nblk = ((str.length + 4) >> 5) + 1
var blks = new Array(nblk * 16)
for (var i = 0; i < nblk * 16; i++) blks[i] = 0
for (var i = 0; i < str.length; i++)
blks[i >> 1] |= str.charCodeAt(i) << ((i % 2) * 16)
blks[i >> 1] |= 0x80 << ((i % 2) * 16)
blks[nblk * 16 - 2] = str.length * 16
return blks
}
function hexMD5(str) { return binl2hex(coreMD5(str2binl(str))) }
function hexMD5w(str) { return binl2hex(coreMD5(strw2binl(str))) }
function b64MD5(str) { return binl2b64(coreMD5(str2binl(str))) }
function b64MD5w(str) { return binl2b64(coreMD5(strw2binl(str))) }
function calcMD5(str) { return binl2hex(coreMD5(str2binl(str))) }
module.exports = {
hexMD5: hexMD5
}