SummerOfCode/2012/UserCSP/WeeklyUpdates/2012-08-13
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This Week
Monday, 13 August
- UserCSP Project report preparation. Project report contains, goal and objectives of the project, functionality and how it works, and technical details of the project.
Tuesday, 14 August
- Intercepted "shouldLoad" method of nsIContentPolicy interface.
- The nsIContentPolicy interface is useful to observe content that is being loaded into browser.
- The "shouldLoad" method of this interface will be called before loading the resource to determine whether to start the load at all.
- This method is useful to infer the rules for website by observing the contents that are loaded by a web page.
Wednesday, 15 August
- Perform the resource load type check to collect information about the type of load and destination domain of the request.
- To infer CSP directive rules such as, script-src, img-src, etc, I intercepted at "shouldLoad" method of nsIContentPolicy interface. When this method is invoked it provides various information, we are specifically interested in following information:
aContentType : TYPE_IMAGE, TYPE_SCRIPT, TYPE_OBJECT, etc. aContentLocation: It contains destination domain URL where resource is hosted. aRequestOrigin: The domain that initiated this resource load request.
- For example, If request is of TYPE_IMAGE then for "aRequestOrigin", I stored "aContentLocation" URL in "img-src" directive. The entry is only inserted if it doesn't exists in CSP directive to remove duplicates.
Thursday, 16 August
- Inferred policy for a website by observing its resource loading is send to add-on UI component for displaying it in the add-on UI.
** Inferred policy for a website is shown in the "ALL" tab of the add-on UI.
- Automatically inferred policy for a website provides hints for users in configuring CSP directives as well as makes their job easier while configuring a CSP policy for the website.