[bool]SetKey([Context]$context, [string]$path, [bool]$isCipher)
  {
    $keyPath = [System.IO.Path]::Combine($context.SupplyPath, $path);
    if ($isCipher -eq $true)
    {
      $value = @("Cipher", "/path:$($keyPath)", "/value:$($context.Settings.ChipherKey)", "/q")
    }
    else
    {
      $value = @("Signature", "/path:$($keyPath)", "/value:$($context.Settings.SignatureKey)", "/q")
    }
    return $this.T($context, "SetKey", $value)
  }

  [bool]T([Context]$context, [string]$verb, [object[]]$args)
  {
    & $context.TPath @($verb,$args) | Out-Null
    if ($LASTEXITCODE -ne 0)
    {
      (Get-Host).UI.WriteErrorLine("Installation failed with error code: $LASTEXITCODE`nSee the details in log file: $context.LogPath")
      return $false;
    }
    return $true
  }