initially this was part of nimPDF project, then I decided to release it separately
example:
var sha = initSHA[SHA256]()
sha.update("test SHA256")
let digest = sha.final()
or:
let digest = computeSHA256("test SHA256")
conversion:
- to convert digest into string, use proc $
- to convert digest into hex string, use toHex
each version of SHA2 hash function will produce output according to it's name: SHA224 produce 224 bits hash, SHA256 produce 256 bits hash, and so on
already tested with test vector from here, see tests/test.nim