是否可以“重复地” CodeIgniter中的xss清理数据？

问题描述

以下是Codeigniter中XSS清理数据的方法：

• 设置 global_xss_filtering in config to TRUE


• 使用 xss_clean（）


• 使用 xss_clean 作为验证规则


• 将第二个参数设置为 TRUE $ this-> input-> post（'something'，TRUE）




是否可以在一条数据上使用全部或多个数据？





例如，如果我仍然使用 $ this-> input-> post（'something'，TRUE），即使数据已经被清除， global_xss_filtering 和 xss_clean 验证规则？

解决方案

这不会伤害你，但它绝对是毫无意义的。





最终你会达到一个点其中全局XSS过滤器将是繁琐的。由于它不能被禁用每个控制器没有大量的攻击，并且访问原始的 $ _ REQUEST 数据将是不可能的，你将需要全局禁用它。这将发生在您想要处理单个可信数据或不是HTML输出并且必须保持完整的数据时。





使用它作为表单验证规则是无意义的并且潜在地具有破坏性。想象一下这个网站会是什么样子，如果每次你输入< script> 它被替换为 [removed] 没有办法在将来恢复它。又例如，如果用户在他的密码中使用了一些XSS内容怎么办？





只要在需要的地方使用XSS过滤器：在HTML输出中，可以执行javascript的地方。




The following are ways to XSS-clean data in Codeigniter:

• set global_xss_filtering in config to TRUE
• use xss_clean()
• use xss_clean as a validation rule
• set the second parameter to TRUE in $this->input->post('something', TRUE)

Is it okay to use all or more than one of them on one piece of data?

For example, would it be okay if I still used $this->input->post('something', TRUE) even if the data has already been cleaned by global_xss_filtering and xss_clean validation rule?

解决方案

It's not going to hurt you, but it is definitely is pointless.

There's a very good chance that eventually, you will reach a point where the global XSS filter is going to be cumbersome. Since it can't be disabled per controller without extensive hacks, and access to the raw $_REQUEST data will be impossible, you will need to disable it globally. This will happen the moment you want to process a single piece of trusted data, or data that isn't HTML output and must remain intact.

Using it as a form validation rule is pointless and potentially destructive as well. Imagine what this site would be like if every time you typed <script> it was replaced with [removed], with no way to revert it in the future. For another example, what if a user users some "XSS" content in his password? Your application will end up altering the input silently.

Just use the XSS filter where you need it: on your HTML output, places where javascript can be executed.

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