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#!/usr/bin/env python
"""
Copyright (c) 2006-2024 sqlmap developers (https://sqlmap.org/)
See the file ' LICENSE ' for copying permission
"""
import os # 导入操作系统模块，用于获取文件路径等信息
from lib . core . common import singleTimeWarnMessage # 从核心库导入单次警告消息函数
from lib . core . enums import DBMS # 从核心库导入数据库管理系统枚举
from lib . core . enums import PRIORITY # 从核心库导入优先级枚举
# 设置优先级为最高
__priority__ = PRIORITY . HIGHEST
def dependencies ( ) :
singleTimeWarnMessage ( " tamper script ' %s ' is only meant to be run against %s " % ( os . path . basename ( __file__ ) . split ( " . " ) [ 0 ] , DBMS . MYSQL ) )
def tamper ( payload , * * kwargs ) :
"""
这个函数用于篡改（ ） ， ' CONCAT(A, B) ' 函数替换为其等效的 ' CONCAT_WS(MID(CHAR(0), 0, 0), A, B) ' 形式。
参数：
payload：
**kwargs： （ ）
要求：
* 仅适用于MySQL数据库。
测试情况：
* MySQL 5.0
注意：
* 这个篡改方法对于绕过那些过滤CONCAT()函数的非常弱的定制Web应用防火墙很有用。
示例：
>>> tamper( ' CONCAT(1,2) ' )
' CONCAT_WS(MID(CHAR(0),0,0),1,2) '
"""
if payload :
# 将payload中的'CONCAT('替换为'CONCAT_WS(MID(CHAR(0),0,0),'
payload = payload . replace ( " CONCAT( " , " CONCAT_WS(MID(CHAR(0),0,0), " )
return payload
