From 23f33a52d6cfa48aea6c7cc994ef611568ed6a4a Mon Sep 17 00:00:00 2001
From: salamander <salamander@51lucy.com>
Date: Wed, 9 Dec 2020 21:57:47 +0800
Subject: [PATCH 1/3] add decrypt data function for wechat miniprogram.

---
 lib/util.js | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/lib/util.js b/lib/util.js
index 1f9341f..91b1f5a 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -1,4 +1,5 @@
 'use strict';
+const crypto = require('crypto');
 
 /*!
  * 对提交参数一层封装，当POST JSON，并且结果也为JSON时使用 */
@@ -42,3 +43,30 @@ function _replaceOneChar(c) {
 exports.replaceJSONCtlChars = function (str) {
   return str.replace(JSONCtlCharsRE, _replaceOneChar);
 };
+
+/**
+ * 小程序加密数据解密算法
+ * https://developers.weixin.qq.com/miniprogram/dev/framework/open-ability/signature.html
+ * @param {string} sessionKey
+ * @param {string} iv
+ * @param {string} encryptedData
+ * @returns {Promise<Object>}
+ */
+exports.decryptDataForMiniProgram = async function (sessionKey, iv, encryptedData) {
+  const sessionKeyBuffer = Buffer.from(sessionKey, 'base64');
+  const ivBuffer = Buffer.from(iv, 'base64');
+  const encryptedBuffer = Buffer.from(encryptedData, 'base64');
+
+  try {
+    const decipher = crypto.createDecipheriv('aes-128-cbc', sessionKeyBuffer, ivBuffer);
+    // 设置自动 padding 为 true，删除填充补位
+    decipher.setAutoPadding(true);
+    const decoded =
+        decipher.update(encryptedBuffer, 'binary', 'utf8') +
+        decipher.final('utf8');
+
+    return JSON.parse(decoded);
+  } catch (err) {
+    throw new Error('解密失败');
+  }
+};

From 570d3cd4cd41179f4efa5ae0d6b6895541fa3c5d Mon Sep 17 00:00:00 2001
From: salamander <salamander@51lucy.com>
Date: Wed, 9 Dec 2020 22:00:52 +0800
Subject: [PATCH 2/3] fix.

---
 lib/util.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/util.js b/lib/util.js
index 91b1f5a..2efd3ae 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -50,9 +50,9 @@ exports.replaceJSONCtlChars = function (str) {
  * @param {string} sessionKey
  * @param {string} iv
  * @param {string} encryptedData
- * @returns {Promise<Object>}
+ * @returns {Object}
  */
-exports.decryptDataForMiniProgram = async function (sessionKey, iv, encryptedData) {
+exports.decryptDataForMiniProgram = function (sessionKey, iv, encryptedData) {
   const sessionKeyBuffer = Buffer.from(sessionKey, 'base64');
   const ivBuffer = Buffer.from(iv, 'base64');
   const encryptedBuffer = Buffer.from(encryptedData, 'base64');

From 537465d0a7810e34094df45b6fa63f651da43ac9 Mon Sep 17 00:00:00 2001
From: salamander <salamander@qq.com>
Date: Wed, 24 Mar 2021 14:42:28 +0800
Subject: [PATCH 3/3] not to request token.

---
 lib/api_common.js | 2 +-
 package.json      | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/api_common.js b/lib/api_common.js
index 34c92f7..60156d8 100644
--- a/lib/api_common.js
+++ b/lib/api_common.js
@@ -216,7 +216,7 @@ class API {
       err.code = 40001;
       throw err;
     }
-    return this.getAccessToken();
+    throw new Error('can\'t set access token');
   }
 }
 
diff --git a/package.json b/package.json
index 12d800f..29fa0f0 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-  "name": "co-wechat-api",
+  "name": "co-wechat-api-new",
   "version": "3.11.0",
   "description": "微信公共平台Node库API，ES6版本",
   "main": "index.js",
@@ -30,7 +30,7 @@
     "rewire": "*",
     "travis-cov": "*"
   },
-  "author": "Jackson Tian",
+  "author": "Salamander",
   "license": "MIT",
   "readmeFilename": "README.md",
   "directories": {