sepsplit-rs

A utility to split a SEP firmware into its various modules, made in Rust.

Building

1. Install cargo if you haven't already, instructions are here
2. Run cargo install --path /path/to/sepsplit-rs/
3. Run the executable with sepsplit-rs

Note for Windows

In order to get the program to compile, you may need to

• Install LLVM as shown here
• Either comment out or modify line 52 in lzvn_decode.c in the lzvn repo to #define _LZVN_DEBUG_DUMP(...) if you are using the MSVC compiler.

Usage

As a binary

sepsplit-rs /path/to/sep-firmware.bin [output folder]
The SEP firmware has to be decrypted and extracted.

As a library

1. Use ./src/seplib.h as the header for importing the function.
   
2. Compile a static library with cargo rustc --lib --crate-type staticlib.
   
3. Finally, run the main logic of the program with split(const char* filein, const char* outdir, unsigned int verbose), replacing the parameters with arguments with the necessary safety requirements listed in the header.

Testing

1. cd into the project
2. Run ./download_testfws.sh to download test SEP Firmwares
3. Run the tests with cargo test

Credits

• xerub for the original sepsplit and the fork of LZVN
• matteyeux for helping me test this program
• mrmacete for the 64-bit version