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- DUMP MEMORY RANGE WITH HOPPER DISASSEMBLER HOW TO
- DUMP MEMORY RANGE WITH HOPPER DISASSEMBLER SOFTWARE
Knowledge of instruction sets is important when reverse engineering algorithms.
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Mobile devices use ARMv7, ARMv7s, ARMv8-A, ARMv8.2-A, ARMv8.3-A, and ARM64 CPUs. Modern desktop devices usually use x86-64 CPUs.
DUMP MEMORY RANGE WITH HOPPER DISASSEMBLER HOW TO
One more thing you should pay special attention to before you learn how to reverse engineer a macOS or iOS app is the architecture it was designed for. The code signature is an encrypted code directory represented in CMS format. The negative part optionally contains hashes of such code signature parts as code signing requirements, resources, and entitlements, as well as a hash of the ist file.Ĭode signing requirements, resources, and entitlements are just bytestreams of the appropriate files located inside a bundle. The positive part of the table of hashes contains hashes of executable code pages. The table itself consists of two parts: positive and negative. The code directory is a structure that contains miscellaneous information (hash algorithm, table size, size of code pages, etc.) and a table of hashes. Let’s take a closer look at each element. Let’s start with some basics that you need to know before you try to reverse engineer your first executable.Ĭode signature data contains a number of important elements: To provide easy maintenance of legacy codeīelow, we take a closer look at the basic structure of an executable, briefly cover reversing Objective-C and Swift code, list several of the most popular tools for reverse engineering macOS and iOS apps, and give some reverse engineering tips for a number of use cases.