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Re: Question about directory for Application Caches
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Re: Question about directory for Application Caches


  • Subject: Re: Question about directory for Application Caches
  • From: Jason Coco <email@hidden>
  • Date: Fri, 15 Aug 2008 12:30:04 -0400


On Aug 15, 2008, at 12:21 , Jeff Johnson wrote:

On Aug 15, 2008, at 10:33 AM, Jason Coco wrote:

On Aug 15, 2008, at 11:11 , Jeff Johnson wrote:

Jason,

See the following threads for some discussion of these issues:

http://lists.apple.com/archives/Macnetworkprog/2008/Apr/ msg00033.html

http://lists.apple.com/archives/Xcode-users/2008/Jul/msg00283.html

Interesting... thanks, Jeff. So I guess the answer is for speed/non- sensitive cache
data, maybe confstr(_CS_DARWIN_USER_CACHE_DIR, path, length) is the appropriate
call... and maybe for data that may need to actually reside in the filevault, regardless of
speed, the return value from the Cocoa call is more appropriate (~/ Library/Caches)?

That sounds reasonable.

I would like to point out a couple of interesting things, though...

1) ~/Library/Caches is world writable too... so as long as you're logged in, even if you have
your filevault armed, you're still gonna be somewhat vulnerable to cache attacks.

This is incorrect, FileVault or not. Where do you get that idea?

Oh my... I came to this conclusion because /my/ Caches directory was world-writeable. I checked
another local account on my machine and that Caches directory was also world-writeable. Finally,
I created a new account and checked, whereupon I discovered that it was read-write-exec only by
the owner. Hmm... seems like some dumb application is messing with my Caches directory permissions...
I'll have to check that out!


Thanks again, J

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References: 
 >Question about directory for Application Caches (From: Jason Coco <email@hidden>)
 >Re: Question about directory for Application Caches (From: Jeff Johnson <email@hidden>)
 >Re: Question about directory for Application Caches (From: Jason Coco <email@hidden>)
 >Re: Question about directory for Application Caches (From: Jeff Johnson <email@hidden>)

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