Of course it's possible. You just need to rewrite the algorithm as kernel in OpenCL (basically strong reduced C language).
There's no official documentation about the process adding a new algorithm, but there are some example PR on github that show all the files you need to change. See this commit for example: https://github.com/hashcat/hashcat/commi...4dca42b511
There's no official documentation about the process adding a new algorithm, but there are some example PR on github that show all the files you need to change. See this commit for example: https://github.com/hashcat/hashcat/commi...4dca42b511