优化sm4

utils/util/sm4.js

       let decrypted = sm4.sm4_crypt_cbc(
         ctx,
         ivBytes,
-        base64js.toByteArray(cipherText)
+        base64js.toByteArray(cipherText.data.bizContent)
       )
       let bizContent = utf8ByteToUnicodeStr(decrypted)
       let begin = bizContent.indexOf('[')
         begin = bizContent.indexOf('{')
         end = bizContent.lastIndexOf('}')
       }
-      cipherText = bizContent.substring(begin, end + 1) || bizContent
+      cipherText.data.bizContent = bizContent.substring(begin, end + 1) || bizContent
       return cipherText
     } catch (e) {
       console.error(e)