Hi,
verifing of a file is often done by builting an MD5 or an sha256 hash over it.
Powershell has no “builtin” functions for this purposes.
So I wrote some 
1 2 3 4 5 6 7 8 | function MD5Sum([string]$sFile){ $oMD5=[System.Security.Cryptography.MD5]::Create() $oStream=[System.IO.File]::OpenRead($sFile) $sMD5=[System.BitConverter]::ToString($oMD5.ComputeHash($oStream)).Replace("-" ,"").ToLower() $oStream.Close() return($sMD5)} |
1 2 3 4 5 6 7 8 | function sha256sum([string]$sFile){ $oSHA256=[System.Security.Cryptography.SHA256]::Create() $oStream=[System.IO.File]::OpenRead($sFile) $sSHA256=[System.BitConverter]::ToString($oSHA256.ComputeHash($oStream)).Replace("-","").ToLower() $oStream.Close() return($sSHA256)} |
Usage
1 2 | PS C:\> sha256sum D:\temp\vshadow.exe7699187b710263779b97ebe63925d77769f15236f0aa506373dd92772bbcf87b |
Michael