pybinary

A simple binary serializer/deserializer in pure python.

Limitations

Variable-sized fields are not supported. No size check on assignment for the most of the types.

Installation

Install from pypi:

pip install pybinary

Or download the repository and build from the sources:

python3 ./setup.py build
python3 ./setup.py install

Examples

ELF64 header

Spec taken from https://refspecs.linuxfoundation.org/elf/gabi4+/ch4.eheader.html

class Elf64_Ehdr(BinarySerializable):
    e_ident = ArrayTypes.bytearray(16)
    e_type = Types.u16
    e_machine = Types.u16
    e_version = Types.u32
    e_entry = Types.u64
    e_phoff = Types.u64
    e_shoff = Types.u64
    e_flags = Types.u32
    e_ehsize = Types.u16
    e_phentsize = Types.u16
    e_phnum = Types.u16
    e_shentsize = Types.u16
    e_shnum = Types.u16
    e_shstrndx  = Types.u16


header = Elf64_Ehdr.deserialize(input_stream_or_bytes) # deserialize header
header.e_phnum += 1 # update any field
header.serialize() # serialize and get updated bytes
...

CPIO Newc ACII Format Archive

Spec taken from https://manpages.ubuntu.com/manpages/bionic/man5/cpio.5.html

Code here