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Decrypting iPhone Apps

24 October 2011 ~6 min By saurabh
Crypto Howto Ios Report-Info Reversing
This blog post steps through how to convert encrypted iPhone application bundles into plaintext application bundles that are easier to analyse. Requirements: 1) Jailbroken iPhone with OpenSSH, gdb plus other utilities (com.ericasadun.utilities etc. etc.) 2) An iPhone app 3) On your machine: otool (comes with iPhone SDK) Hex editor (0xED, HexWorkshop etc.) Ida – Version 5.2 through 5.6 supports remote debugging of iPhone applications (iphone_server). For this article, I will use the app name as “blah”.