# Introduction¶

The purpose of this project is to provide a cross platform library which can parse, modify and abstract ELF, PE, MachO and Android formats.

Main features:

• Parser: LIEF can parse ELF, PE, MachO, DEX, OAT, ART and VDEX. Moreover it provides an user-friendly API to access to format internals.

• Modify: LIEF enables to modify some parts of these formats

• Abstract: Three formats have common features like sections, symbols, entry point… LIEF factors them.

• API: LIEF can be used in C, C++ and Python

The global architecture looks like this:

In the architecture, each format has its own namespace, parser and builder. The parser takes a binary, library… as input and decomposes in LIEF object. For instance, the ELF  format has segments, so ELF::Parser will parse segments to create ELF::Segment. In the ELF::Binary class we will have a list of ELF::Segment which can be modified (change type, size, content…). Then the ELF::Builder will transform ELF::Binary into a valid executable.

This process can be summed up in the following figure: