Powershell - Mount and unlock Bitlocker VHD

mount-unlock-vhd.ps1

# Escalate script if not run as administrator
If (-NOT ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator))
{
  # Relaunch as an elevated process:
  Start-Process powershell.exe "-File",('"{0}"' -f $MyInvocation.MyCommand.Path) -Verb RunAs
  exit
}

# Mount vhd file
# Use the following path if the vhd file is in the same directory as this script:
# $path = Join-Path $PSScriptRoot my.vhd
$path = "C:\path\to\my.vhd"

## Hyper-V Method
# Use this if you have Hyper-V installed
# $diskimage = Mount-VHD -path $path -PassThru

## Diskpart Method
# Use this if you don't want to install Hyper-V
$results = @(
    "select vdisk file=$path",
    "attach vdisk"
) | diskpart
$diskimage = Get-DiskImage $path

# Find volume with drive letter
$volumes =  $diskimage | Get-Disk | Get-Partition | Get-Volume

# Mount bitlocker volume by drive letter, looping until Unlock-BitLocker doesn't return an error
while (!$bitlocker) {
    $bitlocker = Unlock-BitLocker -MountPoint $volumes.DriveLetter -Password (Read-Host 'Enter Password' -AsSecureString)
}
Invoke-Item $bitlocker.MountPoint

# References for Diskpart method:
# https://www.top-password.com/blog/mount-and-unmount-vhd-vhdx-from-command-line/