Some useful golang packages:
eax -- EAX mode of cryptographic block ciphers
srp6a -- SRP6a authentication algorithm. The routines comply with RFC 5054
crock32 -- a base32 encoding using an alphabet specified by Douglas Crockford in http://www.crockford.com/wrmg/base32.html
vbs -- see https://github.com/halftwo/knotty/blob/master/xslib/vbs.rst
xic -- an RPC framework
and more