Re: sha256 on files - different hashes

[sky_khan]

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()