>> OK, thank you.  Is it possible, would you happen to know, for an 
>> application
>> to verify its own signature?  I do this on Windows (using WinVerifyTrust) 
>> to
>> check that the code has not been tampered with.  Can't trust anybody 
>> these
>> days :)

> It is possible, but the APIs to code-signing are private. That said, they
> are very easy to work with and the code is open-source
> (libsecurity_codesigning).

> Here is an Apple patent that talks about their code-signing library and
> includes a 6-line sample for doing dynamic validation:
> http://www.freepatentsonline.com/y2008/0168553.html


Thanks again.  I think that might have taken some finding! 

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