libgpucrypto

🔥Special thanks to lwakefield, who not only went out of his way to find libgpucrypto's source code, but also uploaded it for anyone to use

This project is not actively maintained, but go ahead and open issues and I (or someone else) might get around to looking into it. I forked the libgpucrypto library and fixed it just enough to build fine. I don't intend on doing much else unless I need to. Originally, the project required g++ 4.4 or older and CUDA Toolkit 4.0. After my patches, it can now build with the latest g++ and CUDA Toolkit but still requires OpenSSL 1.0.2 or older. I might end up needing a newer version of OpenSSL, at which point I will add support for that. Unfortunately, it will take much more work than it did to update the project to the latest g++ and CUDA Toolkit.

If you want to add support for newer versions of OpenSSL, you can open up an issue here and I'll give you a rundown of what needs to be done

I was able to build the project successfully with these specs:
Linux Mint 20.2
GTX 1050
OpenSSL 1.0.2f
CUDA Toolkit v11.4
g++ 9.3.0

Requirements:
Linux (Untested on Windows)
CUDA Toolkit
OpenSSL 1.0.2 or lower
make
g++ or equivalent

How to build:

1. Open up Makefile.in and modify the following:
   a. Set OPENSSL_DIR to your OpenSSL install location. If you leave it blank the system default will be used.
   b. Set CUDA_TOOLKIT_DIR to your CUDA Toolkit directory (e.g. /usr/local/cuda-11.4)
   c. Set COMPUTE_CAPABILITY to the compute capability of your GPU. For example my GTX 1050 supports up to compute capability 6.1, so I put 61
2. Run make to build the project
3. Make sure to link libgpucrypto and its dependencies to your project in the proper order. For example: g++ myfile.cpp -L/usr/local/ssl/lib64 -L/path/to/libgpucrypto/lib -L/usr/local/cuda-11.4/lib64 -libgpucrypto -lcrypto -lcudart.

Because of a quirk in gcc/g++, dependencies have to be listed in a specific order. Say my program depends on two libraries, libx and liby. Each of these libraries has their own dependencies: libx depends on liba, and liby depends on libb.

The dependency tree would look like this:

-- myprogram.cpp
---- libx
-------- liba
---- liby
-------- libb

See how libx and liby are both on the first level on the tree? And liba and libb are both on the second level of the tree?
That's exactly how we'll order our command: g++ myprogram.cpp -lx -ly -la -lb
Notice how all the dependencies on the first level are listed first, then all the dependencies on the second level are listed second and so on.