diff --git a/src/utils/aescbc.js b/src/utils/aescbc.js
index 3da8d7f..f5ad680 100644
--- a/src/utils/aescbc.js
+++ b/src/utils/aescbc.js
@@ -6,42 +6,58 @@ const cbc_iv = CryptoJS.enc.Utf8.parse('1234567812345678')
  * 默认参数需要加密
  * @type {boolean}
  */
-const jia_mi = true
+const  jia_mi=false;
 /**
  * 默认后台会自动加密
  * @type {boolean}
  */
-const jie_mi = true
+const  jie_mi=false;
 /**
  * 加密
  * @param word
  * @returns {string}
  */
-export const encryptCBC = function (word) {
-  if (!jia_mi) {
-    return word
+export const encryptCBC = function(word) {
+  if(!jia_mi){
+    return  word;
   }
   const srcs = CryptoJS.enc.Utf8.parse(word)
   const encrypted = CryptoJS.AES.encrypt(srcs, cbc_key, {
     iv: cbc_iv,
     mode: CryptoJS.mode.CBC,
-    padding: CryptoJS.pad.Pkcs7,
+    padding: CryptoJS.pad.Pkcs7
   })
   return encrypted.toString()
 }
+
 /**
  * 解密
  * @param word
  * @returns {*}
  */
-export const decryptCBC = function (word) {
-  if (!jie_mi) {
-    return word
+export const decryptCBC = function(word) {
+  if(!jie_mi){
+    return  word;
   }
   const encrypted = CryptoJS.AES.decrypt(word, cbc_key, {
     iv: cbc_iv,
     mode: CryptoJS.mode.CBC,
-    padding: CryptoJS.pad.Pkcs7,
+    padding: CryptoJS.pad.Pkcs7
   })
   return encrypted.toString(CryptoJS.enc.Utf8)
 }
+
+/**
+ * 文件预览专用
+ * @param word
+ * @returns {string}
+ */
+export const encryptCBCTime= function(word) {
+  const srcs = CryptoJS.enc.Utf8.parse(word)
+  const encrypted = CryptoJS.AES.encrypt(srcs, cbc_key, {
+    iv: cbc_iv,
+    mode: CryptoJS.mode.CBC,
+    padding: CryptoJS.pad.Pkcs7
+  })
+  return encrypted.toString()
+}