On Tue, Mar 16, 2010 at 03:46, Caleb James DeLisle <[email protected]
wrote:
Right now a script which is saved with programming access is allowed to do things which the viewer (who executes it) is not allowed to do. I would like to extend this to scripts which do not have programming access.
Use case example: A page where the viewer can submit an email address to be put on a mailing list. The page needs to be able to save the email address to a list but the viewer should not be able to directly edit (or view) the list.
I would like to add to xwiki.api.Context: void setScriptUser(String) String getScriptUser() (These names are the best I could think of, suggestions would be great)
the input can be either "viewer", "author" or "default" and it stores this in the XWikiContext If the value is set to author, hasAccessLevel will return an access check on the author, not the viewer.
When includeForm is called, or the include macro is invoked, the only explicit change is that changes made by the called document will be reset when the include ends. If scrips are set to run with author's permissions: If DocumentA includes documentB, documentB executes with documentB's author's permissions. If DocumentA includes _in context_ documentB, documentB executes with documentA's author's permissions. When include of documentB ends, scriptUser is set back to the value which documentA left it at.
I think this will help us achieve the goal of no documents with programming rights in the XE xar file.
WDYT?
Caleb
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First of all, I am personally against adding anything to the RightService in its current state. This is already spaghetti code which already lead to some security risks, and trying to improve that partly could be an impossible challenge. Moreover, this code is absolutely not optimized, you just have to put it under debug logging to understand what I mean. Regarding the way you expect the inclusion of documents to function, I am not convince that this is the right choice. The behavior of inclusion has been broken since Syntax 2.0 has been introduced, and I have always feel this to be a serious regression. My principal use case is a document (that could have been created by a user) editable by a user, and that store objects in itself, and use an inclusion in context for its content. In this case, the user may save the document, which should therefore be without any special rights, but the code may need to have higher privileges, and still require to be included in context for access to the including documents. This is the typical Sheet case shown in many sample of XWiki Programming, but with programming right requirement. I have used that many times before it became broken, and this design is still missing to me. I am convince that the rights given to a block of code should be tightly linked to the content author of its containing document, and absolutely not based on any author in the context in which it is executed. This has been broken in Syntax 2.0, and this currently leads to elevation of privilege through inclusions. For the same reason, I do not follow Alex on the idea that the right should be set in place of a user. This would lead to many problem in regards of who and how this could be set, stored and inherited. I completely agree that the programming right is currently not perfect, but in the same time, I do not see the real value you expect to provide. There is already a similar mechanism in place, using the content author, opposed to the last author of a page. This is what make commenting page possible without breaking its programming behavior. Extending this to manage other objects in my use case above, is probably a good track to follow. But again, this should be part of a global reengineering of the RightService. If you want to rethink the RightService starting from scratch, I will surely participate ! I have already some ideas, but not been able to put them properly in a document. Time is always missing, but I hope this to change... Regards, Denis -- Denis Gervalle SOFTEC sa - CEO eGuilde sarl - CTO