March 2016
Intermediate to advanced
312 pages
7h 15m
English
Content preview from Mobile Application Penetration Testing
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The Mach-O binary file format
Similar to the file formats used in the OS X operating system, iOS apps are also compiled to native code using the Mach-O file format. A binary can support multiple architectures, and multiple Mach-O files can be archived into the same binary that resides on the device; these are known as universal or fat binaries. In addition, apps downloaded from App Store are encrypted using FairPlay DRM (short for Digital Rights Management) and decrypted later during runtime by the loader on the device.
The Mach-O file format consists of three main regions, as shown in the following diagram:
Note
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