# This script is refered by other scripts.
# You must put this in the PowerShell search path.

function getMd5sum {
    param($Path)
    $md5str = ""
    
    if (Test-Path -PathType Leaf $Path) {
        $fi = Get-Item $Path
        $fs = New-Object IO.FileStream -ArgumentList $fi.FullName, "Open", "Read"

        $md5sb = New-Object Text.StringBuilder

        $md5obj = [Security.Cryptography.MD5]::Create()
        $md5bytes = $md5obj.ComputeHash($fs)
        $fs.Close()
        
        foreach ($eb in $md5bytes) {
             [void] $md5sb.Append($eb.ToString("x2"))
        }
        
        $md5str = $md5sb.ToString() + "  " + $fi.Name
    } else {
        $md5str = "No such file: " + $Path
    }
    
    return $md5str
}

getMd5sum($args[0])