fix wechat decode bug

app/service/course/v2/user.js

@@ -140,7 +140,7 @@ class UserService extends Service {
     const userUuid = ctx.userUuid;
     const { avatar, nickname, province, country, sex, city, encryptedData, iv } = input;
     // 查找用户是否存在并更新
-    const user = ctx.classModel.V2.CourseUser.findOne({ where: { uuid: userUuid, is_deleted: 0 } });
+    const user = await ctx.classModel.V2.CourseUser.findOne({ where: { uuid: userUuid, is_deleted: 0 } });
     if (ctx.isEmpty(user)) {
       ctx.failed('用户不存在');
     }

app/service/course/v2/wechat.js

@@ -153,14 +153,19 @@ class WechatService extends Service {
     encryptedData = new Buffer(encryptedData, 'base64');
     iv = new Buffer(iv, 'base64');
 
-    // 解密
-    const decipher = crypto.createDecipheriv('aes-128-cbc', sessionKey, iv);
-    // 设置自动 padding 为 true，删除填充补位
-    decipher.setAutoPadding(true);
-    let decoded = decipher.update(encryptedData, 'binary', 'utf8');
-    decoded += decipher.final('utf8');
-
-    decoded = JSON.parse(decoded);
+    try {
+      // 解密
+      const decipher = crypto.createDecipheriv('aes-128-cbc', sessionKey, iv);
+      // 设置自动 padding 为 true，删除填充补位
+      decipher.setAutoPadding(true);
+      var decoded = decipher.update(encryptedData, 'binary', 'utf8');
+      decoded += decipher.final('utf8');
+
+      decoded = JSON.parse(decoded);
+
+    } catch (err) {
+      ctx.failed('Illegal Buffer');
+    }
 
     return decoded;
   }