Get-StringHash.ps1

Function Get-StringHash {
  Param (
    [Parameter(ValueFromPipeline)][String[]]$String,
    [ValidateSet('MD5','RIPEMD160','SHA1','SHA256','SHA384','SHA512')]$HashName = 'SHA256'
  )
  Process  {
    $StringBuilder = New-Object System.Text.StringBuilder
    [System.Security.Cryptography.HashAlgorithm]::Create($HashName).ComputeHash([System.Text.Encoding]::UTF8.GetBytes($String)) | %{
        [Void]$StringBuilder.Append($_.ToString("x2"))
    }
    $StringBuilder.ToString()
  }
}