Open source / trusted rooting app for Android / Motorola Defy? I found a lot of compiled rooting exploits for Android, but not a lot of source code.

So, how can I trust an exploit able to take SU rights on my mobile device? How can I be sure there is no root-kit/bot/spyware inside?

I'm maybe a little paranoid, but this is a very serious issue for me:

My PDA contain a lot of private/secret informations (personal and professional), so, is there a trusted/secure way to root an Android device? (A Motorola Defy in particular)



[EDIT]

I insist on this last point: 


  is there a trusted/secure way to root an Android device? (A Motorola Defy in particular)


Does anybody know an open source or trusted rooting app for Android, and Motorola Defy in particular?
Perhaps a simple answer but if the author doesn't provide the sourcecode of the App und you know that it doesn't originate of a trusted source, you can't be sure that it's clean.

If it's a high risk for you you probably should not use it.