Adding CRC64

Hello all,

I would like to add CRC64 support. Currently, it appears that there are multiple variants and there is not a clear "official" one to add. CRC32 is supported already, and since hashcat went open source (from what I can tell) primarily to allow new algorithms to be added, I am assuming that adding this should be relatively easy.

However, I cannot find any information on how to go about this.

What do I need to do?

Thanks in advance!