I think this ( below ) works but IMO this library should provide a way works on
arrays, not strings. This is inefficient.
import nimSHA2, os, strutils
proc main(): string =
const blockSize = 8192
var bytesRead: int = 0
var buffer: string
var f: File = open("./file.bin")
var sha: SHA256
sha.initSHA()
buffer = newString(blockSize)
bytesRead = f.readBuffer(buffer[0].addr, blockSize)
setLen(buffer,bytesRead)
while bytesRead > 0:
echo bytesRead
sha.update(buffer)
setLen(buffer,blockSize)
bytesRead = f.readBuffer(buffer[0].addr, blockSize)
setLen(buffer,bytesRead)
let digest = sha.final()
result = digest.hex()
when isMainModule:
echo main()
