Payload Dumper

usage: payload_dumper.py [-h] [-v] [--old OLD_DIR] [--out OUT_DIR] [--check] payload.bin

Dependencies

• python3
• protobuf
• bsdiff
• puffin

External tools

bsdiff

Source

• https://android.googlesource.com/platform/external/bsdiff/+/refs/tags/android-10.0.0_r25

Dependencies (OS: Debian)

• libbrotli-dev
• libbz2-dev
• libdivsufsort-dev

Build

git submodule update --init
cd bsdiff 

make
sudo cp bsdiff bspatch /usr/local/bin/
sudo cp -r include/bsdiff /usr/local/include/bsdiff
sudo cp libbsdiff.so libbspatch.so /usr/local/lib/
sudo ldconfig

puffin

Source

• https://android.googlesource.com/platform/external/puffin/+/refs/tags/android-10.0.0_r25

Dependencies (OS: Debian)

• bsdiff
• libgflags-dev
• libgoogle-glog-dev
• libgtest-dev
• libprotobuf-dev
• protobuf-compiler

Build

git submodule update --init
cd puffin

git apply ../puffin.patch

protoc -Isrc --cpp_out=src src/puffin.proto
make
sudo cp puffin_binary /usr/local/bin/puffin