Re: NSTask Leaking...
Re: NSTask Leaking...
- Subject: Re: NSTask Leaking...
- From: "Mr. Gecko" <email@hidden>
- Date: Thu, 29 Jan 2009 13:33:54 -0600
I'm just going to use sscrypto framework for it...
On Jan 29, 2009, at 12:39 PM, glenn andreas wrote:
On Jan 29, 2009, at 12:20 PM, Mr. Gecko wrote:
Hello, I'm trying to make my own licenses system and I need MD5 to
verify that the key in the file is right and isn't a fake.
what I've got now is a NSTask that runs md5 -s salt+key+salt2 and
it works, but I am getting a leak with NSTask...
Regardless of any other problems, you've introduced a serious
weakness - a hacker just needs to temporarily change /sbin/md5 to a
shell script that cats the expected output. For that matter, they
could easily edit the binary to change the string "/sbin/md5" to
another path that does the deed (to avoid having to mess with sbin
each time)
If you are trying to write secure code, don't execute external
binaries that you have no control over and expect it to be secure.
Glenn Andreas email@hidden
<http://www.gandreas.com/> wicked fun!
JSXObjC | the easy way to unite JavaScript and Objective C
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