Php validating xml

02-Aug-2017 00:15

All sections should be reviewed The most common web application security weakness is the failure to properly validate input from the client or environment.Data from the client should never be trusted for the client has every possibility to tamper with the data.Because it is an event-based, non validating parser, Expat is fast and well suited for web applications.The XML parser functions lets you create XML parsers and define handlers for XML events.However, simply preventing attacks is not enough - you must perform Intrusion Detection in your applications.Otherwise, you are allowing attackers to repeatedly attack your application until they find a vulnerability that you haven't protected against.

However, because it uses SAX, it is not easy to combine DTD validation with DOM.You can validate a DOM object only against the DTD defined at the top of the XML document.To ensure that the application is robust against all forms of input data, whether obtained from the user, infrastructure, external entities or database systems. This weakness leads to almost all of the major vulnerabilities in applications, such as Interpreter Injection, locale/Unicode attacks, file system attacks and buffer overflows.In many cases, Encoding has the potential to defuse attacks that rely on lack of input validation.For example, if you use HTML entity encoding on user input before it is sent to a browser, it will prevent most XSS attacks.

However, because it uses SAX, it is not easy to combine DTD validation with DOM.

You can validate a DOM object only against the DTD defined at the top of the XML document.

To ensure that the application is robust against all forms of input data, whether obtained from the user, infrastructure, external entities or database systems. This weakness leads to almost all of the major vulnerabilities in applications, such as Interpreter Injection, locale/Unicode attacks, file system attacks and buffer overflows.

In many cases, Encoding has the potential to defuse attacks that rely on lack of input validation.

For example, if you use HTML entity encoding on user input before it is sent to a browser, it will prevent most XSS attacks.

For this to work, you'll configure a list of rules (called service.