Re: Using the security framework
Re: Using the security framework
- Subject: Re: Using the security framework
- From: Nick Zitzmann <email@hidden>
- Date: Thu, 22 Jan 2009 15:57:40 -0700
On Jan 22, 2009, at 4:09 PM, Joe Turner wrote:
I see. Then, how would you suggest to create a cloner/deleter, if it
needs root privileges, but cannot use the security framework?
I didn't say you couldn't use the security framework. I said you ought
to consider re-thinking your strategy.
And, since running scripts from root is dangerous, then is there any
good way to be able to delete protected (not your user account)
files? Or, should I just have it copy or delete files the user has
access to?
There's nothing wrong with running scripts strictly as root, since a
lot of system scripts are run this way. But AEWP() doesn't run
executables as root; it runs them as the user with root privileges.
There's an important difference.
Instead of running a shell script, run another non-GUI command line
tool of your making with AEWP() that does the required privileged task
(s). Running shell code with root privileges as some user is possible,
but it's an easy attack vector due to the inheritance of the user's
shell environment. Running a command line tool is a bit more difficult
to hack (but still possible if someone is determined enough). Plus,
then you can use NSFileManager. :)
You could even take security to the extreme, as I once did in an
application, and check signatures before calling AEWP(), but that's
probably too extreme, as it's unlikely someone will rewrite or replace
your executable unless the file system gave them permission to do so.
Nick Zitzmann
<http://www.chronosnet.com/>
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