libtatsu

Library handling the communication with Apple's Tatsu Signing Server (TSS).

Table of Contents

• Features
• Building
  • Prerequisites
    • Linux (Debian/Ubuntu based)
    • macOS
    • Windows
  • Configuring the source tree
  • Building and installation
• Usage
• Contributing
• Links
• License
• Credits

Features

This library is part of the libimobiledevice project. The main purpose of this library is to allow creating TSS request payloads, sending them to Apple's TSS server, and retrieving and processing the response.

The code was originally part of idevicerestore and has been split out to its own library, while obviously idevicerestore will remain the main consumer.

Building

Prerequisites

You need to have a working compiler (gcc/clang) and development environent available. This project uses autotools for the build process, allowing to have common build steps across different platforms. Only the prerequisites differ and they are described in this section.

libtatsu requires libplist version 2.6.0 or later. Check the Building section of the README on how to build it. Note that some platforms might have it as a package. Also libcurl is required, but most platforms already have it available as a package.

Linux (Debian/Ubuntu based)

• Install all required dependencies and build tools:

  sudo apt-get install \
  	build-essential \
  	pkg-config \
  	checkinstall \
  	git \
  	autoconf \
  	automake \
  	libtool-bin \
  	libplist-dev \
    libcurl4-openssl-dev

  In case libplist-dev is not available, you can manually build and install it. See note above.

macOS

• Make sure the Xcode command line tools are installed. Then, use either MacPorts or Homebrew to install automake, autoconf, libtool, etc.

  Using MacPorts:

  sudo port install libtool autoconf automake pkgconfig

  Using Homebrew:

  brew install libtool autoconf automake pkg-config

  For libcurl, it is recommended to use the system specific library:

  export libcurl_CFLAGS="-I`xcrun --sdk macosx --show-sdk-path 2>/dev/null`/usr/include"
  export libcurl_LIBS="-lcurl"

Windows

• Using MSYS2 is the official way of compiling this project on Windows. Download the MSYS2 installer and follow the installation steps.

  It is recommended to use the MSYS2 MinGW 64-bit shell. Run it and make sure the required dependencies are installed:

  pacman -S base-devel \
  	git \
  	mingw-w64-x86_64-gcc \
  	make \
  	libtool \
  	autoconf \
  	automake-wrapper \
  	pkg-config \
  	libcurl-devel

  NOTE: You can use a different shell and different compiler according to your needs. Adapt the above command accordingly.

Configuring the source tree

You can build the source code from a git checkout, or from a .tar.bz2 release tarball from Releases. Before we can build it, the source tree has to be configured for building. The steps depend on where you got the source from.

Since libtatsu depends on other packages, you should set the pkg-config environment variable PKG_CONFIG_PATH accordingly. Make sure to use a path with the same prefix as the dependencies. If they are installed in /usr/local you would do

export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig

• From git

  If you haven't done already, clone the actual project repository and change into the directory.

  git clone https://github.com/libimobiledevice/libtatsu
  cd libtatsu

  Configure the source tree for building:

  ./autogen.sh

• From release tarball (.tar.bz2)

  When using an official release tarball (libtatsu-x.y.z.tar.bz2) the procedure is slightly different.

  Extract the tarball:

  tar xjf libtatsu-x.y.z.tar.bz2
  cd libtatsu-x.y.z

  Configure the source tree for building:

  ./configure

Both ./configure and ./autogen.sh (which generates and calls configure) accept a few options, for example --prefix to allow building for a different target folder. You can simply pass them like this:

./autogen.sh --prefix=/usr/local

or

./configure --prefix=/usr/local

Once the command is successful, the last few lines of output will look like this:

[...]
config.status: creating config.h
config.status: executing depfiles commands
config.status: executing libtool commands

Configuration for libtatsu 1.0.0:
-------------------------------------------

  Install prefix: .........: /usr/local

  Now type 'make' to build libtatsu 1.0.0,
  and then 'make install' for installation.

Building and installation

If you followed all the steps successfully, and autogen.sh or configure did not print any errors, you are ready to build the project. This is simply done with

make

If no errors are emitted you are ready for installation. Depending on whether the current user has permissions to write to the destination directory or not, you would either run

make install

OR

sudo make install

If you are on Linux, you want to run sudo ldconfig after installation to make sure the installed libraries are made available.

Usage

This library is directly used by idevicerestore and libimobiledevice, so there is no need to do anything in particular. Feel free to use it in your project, check the header files for available functions. A documentation might be added later.

Contributing

We welcome contributions from anyone and are grateful for every pull request!

If you'd like to contribute, please fork the master branch, change, commit and send a pull request for review. Once approved it can be merged into the main code base.

If you plan to contribute larger changes or a major refactoring, please create a ticket first to discuss the idea upfront to ensure less effort for everyone.

Please make sure your contribution adheres to:

• Try to follow the code style of the project
• Commit messages should describe the change well without being too short
• Try to split larger changes into individual commits of a common domain

Links

• Homepage: https://libimobiledevice.org/
• Repository: https://github.com/libimobiledevice/libtatsu.git
• Issue Tracker: https://github.com/libimobiledevice/libtatsu/issues
• Mailing List: https://lists.libimobiledevice.org/mailman/listinfo/libimobiledevice-devel
• Twitter: https://twitter.com/libimobiledev

License

This library is licensed under the GNU Lesser General Public License v2.1, also included in the repository in the COPYING file.

Credits

Apple, iPhone, iPad, iPod, iPod Touch, Apple TV, Apple Watch, Mac, iOS, iPadOS, tvOS, watchOS, and macOS are trademarks of Apple Inc.

This project is an independent software library and has not been authorized, sponsored, or otherwise approved by Apple Inc.

README Updated on: 2024-10-22