作者：AlcyoneYYXJ
如有錯誤or不同的思路還請給位指正交流&學習
，
第一題 Key在哪裏？
http://lab1.xseclab.com/base1_4a4d993ed7bd7d467b27af52d2aaa800/index.php
題目地址
第二題 再加密一次你就得到Key啦~
第三題 猜猜這是經過了多少次加密
加密後的字符串爲: 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
這個末尾的=給人直覺這是base64 又說多次加密
而且base64就是越加密越長，那就把這些多次base64解碼
越解越短，最終得到
第四題 據說MD5加密很安全，真的是嗎？
在線查詢MD5
結果就是key
第五題 種族歧視
http://lab1.xseclab.com/base1_0ef337f3afbe42d5619d7a36c19c20ab/index.php
把這裏的中文都去掉
得到的響應也就變了
第六題 HAHA瀏覽器
http://lab1.xseclab.com/base6_6082c908819e105c378eb93b6631c4d3/index.php
修改這個這HAHA
得到
第七題 Key究竟在哪裏呢？
http://lab1.xseclab.com/base7_eb68bd2f0d762faf70c89799b3c1cc52/index.php
第八題 Key又找不到了
http://lab1.xseclab.com/base8_0abd63aa54bef0464289d6a42465f354/index.php
此處懷疑藏了一個網頁但是很快跳轉了
攔截之後發給repeater,點Go一步一步來
跳轉到這個php頁面
第九題 冒充登陸用戶
http://lab1.xseclab.com/base9_ab629d778e3a29540dfd60f2e548a5eb/index.php
看到這個就想估計改成1就行了
第十題 比較數字大小
http://lab1.xseclab.com/base10_0b4e4866096913ac9c3a2272dde27215/index.php
發現對輸入字符有長度限制，所以攔截後修改
另一個思路，直接修改前端的限制
提交後出現flag
第十一題 本地的誘惑
http://lab1.xseclab.com/base11_0f8e35973f552d69a02047694c27a8c9/index.php
查看源代碼
第十二題 就不讓你訪問
http://lab1.xseclab.com/base12_44f0d8a96eed21afdc4823a0bf1a316b/index.php
看提示是robots.txt
然後直接訪問這個文件http://lab1.xseclab.com/base12_44f0d8a96eed21afdc4823a0bf1a316b/robots.txt
那就再訪問這個文件夾
http://lab1.xseclab.com/base12_44f0d8a96eed21afdc4823a0bf1a316b/9fb97531fe95594603aff7e794ab2f5f/
得到
那就訪問login.php
http://lab1.xseclab.com/base12_44f0d8a96eed21afdc4823a0bf1a316b/9fb97531fe95594603aff7e794ab2f5f/login.php
