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Jun 20, 2016 pm 12:36 PM

php verification code

做验证码的时候,我用ajax将用户生成的验证码提交到php进行判断

有人说这样做是不对,别人可以绕过js

我不解的是他绕过了js 验证验证码会失效,但我表单也不会提交,因为我表单是写在ajax返回成功状态里的

回复讨论(解决方案)

ajax将用户生成的验证码提交到php进行判断这边的“用户生成的验证码”是个什么意思？

用户填写的验证码

不明白你的不解是什么
如果是质疑人家的说法，那就大可不必了

我懂了，你是把验证码在js端提取出来单独验证了
这样确实会有安全性问题，要一起验证才能实现限制的效果
为什么呢，他可以看到你成功后执行的代码吧
浏览器有个执行js代码的功能，直接把成功后的代码拿去执行一下不就绕过了吗。。。

除非你验证码提交后返回了什么关键数据，没有这个数据他无法成功提交
这样验证码还是有用的，但你得保证每次关键的数据不太一样，不然别人手动输入一次就把你内容获取到了
类似返回一个新的验证码，然后提交的接口再做判定。

验证码不能用单独的程序验证，必须和用户名密码一起，否则别人不用浏览器直接发数据包就跳过了

ajax验证一次，然后post提交时再验证一次。

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