ROOTS 2018 Talk: The Swift Language from a Reverse Engineering Perspective – Malte Kraus & Vincent Haupert

Sanna/ November 13, 2018/ Conference, ROOTS

Over the last decade, mobile devices have taken over the consumer market for computer hardware. Almost all these mobile devices run either Android or iOS as their operating systems. In 2014, Apple introduced the Swift programming language as an alternative to Objective C for writing iOS and macOS applications. The rising adoption of this new language has to some extent obsoleted existing techniques for program analysis for these platforms, like method swizzling and “class-dump”. In this paper we discuss features of Swift binaries that help in reverse engineering the functionality of the contained code: We document the memory layout of compound data types and the calling convention used by the Swift compiler, as well as the runtime type information that is used by runtime and debugger when data types are not known statically. This

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