PSCrypto

A PlanetSide specific wrapper around CryptoPP for use with Scala, Java, C++ or C. These functions are used for establishing an authenticated and confidential connection between a PlanetSide server and client.

To get the library, run

$ git clone --recursive https://github.com/psforever/PSCrypto.git

Or if you already cloned without getting the submodules

git submodule update --init --recursive

Why is this library necessary?

PlanetSide uses an older version of a cryptographic library called CryptoPP (Crypto++). It uses this for encrypting, decrypting, and authenticating all login and world packets. Some of the algorithms used by PlanetSide are depreciated and no longer used for modern crypto (read: insecure). This means that implementations of some algorithms (e.g., MD5MAC) are hard to find.

What we have done is figured out the last known version of CryptoPP that used some of these algorithms, forked it, made it compile, and wrapped it so it could be easily called from server code, which is in Scala. It's possible that these old algorithms could be recreated for new modern code, but this was the easiest option and it nearly identically matches what PlanetSide was doing for crypto (discovered after over a month of reverse engineering client netcode).

Building

GNU Make and g++ (GNU C++) required. Builds tested in Debian Jessie, Cygwin with Mingw64, and GNUWin32. In the top-level PSCrypto directory (not the subfolder), run

$ make -j4 # will build for current system's GCC

This will build the CryptoPP dependency and then the pscrypto library, which links to CryptoPP. The pscrypto build artifact will be in pscrypto/ as libpscrypto.so or pscrypto.dll depending on your platform. Note that the library architecture must match that of the JVM or process you are loading it in to, otherwise you will see loader errors.

Keep in mind that if you are building with Cygwin's GCC (not a cross compiler like MinGW), then your binaries will not work on systems without Cygwin installed!

Cross Compiling

Use the environment variable PREFIX to define a compiler tuple for building. For example

$ PREFIX=x86_64-w64-mingw32- make -j4

This will build a pscrypto.dll for 64-bit Windows. Platform and architecture quirks are handled by the file Makefile.inc.

You can also specify the ARCH variable manually (as i686 or x86_64) in order to enable multilib building, if available.

Releasing Code

You are able to create a release on a Linux 64-bit system with the MingW64 compiler toolchain installed. The prefixes required to build in order to support Windows 32,64 and Linux 64-bit are (apt install g++-mingw-w64):

x86_64-w64-mingw32-
i686-w64-mingw32-
x86_64-linux-gnu-

Check out the script to build a release for more information.

Developer Release Checklist

• Everything builds correctly
• System testing has passed (i.e it works on Windows)
• Version has been bumped in pscrypto/pscrypto.h and in the Windows resource file pscrypto/resource.rc
• A release can be made with the build script
• Release notes have been updated
• All external references and this repository are tagged with attached release binaries
• Update links (travis, other readmes) to point to the latest release