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A tool that lets you reverse and freely change CRC checksums through smartfile patching.

This repository is no longer maintained. The focus has shifted to aPythonvariant of this tool (the performance isequivalent).

• Patching and calculating CRC checksums for:
  • CRC32
  • CRC32POSIX (cksum from GNU coreutils)
  • CRC16CCITT
  • CRC16IBM
• Available for GNU/Linux and Windows.
• Minimal GUI (supports CRC32 only; for more advanced options, use CLI version).

It appends a few bytes at the end of the file so that the file checksumcomputes to given hexadecimal hash.

GUI version:

CLI version:

To download precompiled binaries for Windows, head over toreleases.

1. Make sure you haveg++python3-setuptools andpython3-wheelpackages installed

2. Install Meson and Ninja

   pip3 install meson ninja

3. Run following

   meson build --buildtype releaseninja -C build

   Thecrcmanip-gui is not compiled by default. If you want to compile it,make sure you haveqt5 packages installed. Then replace the third stepabove with this one:

   meson build -Dgui=true --buildtype releaseninja -C build

1. Installmingw-w64

2. Replace the content of thecross_mingw_i686.txt andcross_mingw_x86_64.txt files with the one of themingw-w64 filesthat you can findhere

3. Build the binaries

   Windows 32-bit

   meson build_windows32 \    --buildtype release \    --cross-file cross_mingw_i686.txtninja -C build_windows32

   Windows 64-bit

   meson build_windows64 \    --buildtype release \    --cross-file cross_mingw_x86_64.txtninja -C build_windows64

1. Installmxe

2. Add themxe path to the environment variablePATH

3. Install the static version of the qt5 library

   Windows 32-bit

   cd your/path/to/mxe/make MXE_TARGETS=i686-w64-mingw32.static qt5

   Windows 64-bit

   cd your/path/to/mxe/make MXE_TARGETS=x86_64-w64-mingw32.static qt5

4. Build the binaries

   Windows 32-bit

   meson build_windows32 \    --buildtype release \    -Dgui=true \    -Dmxe='/your/path/to/mxe/32-bit' \    --cross-file cross_mingw_i686.txtninja -C build_windows32

   Windows 64-bit

   meson build_windows64 \    --buildtype release \    -Dgui=true \    -Dmxe='/your/path/to/mxe/64-bit' \    --cross-file cross_mingw_x86_64.txtninja -C build_windows64

To build tests, simply add the-Dtests=true option to themeson command.