Get-Hash.ps1
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function Get-Hash { <# .Synopsis Gets a hash for an object .Description Gets a unique hash for an object .Example 1..10 | Get-Hash .Example dir | Get-Hash .Link Write-PowerShellHashtable #> [OutputType([string], [byte[]], [PSObject])] param( # The input object [Parameter(Mandatory=$true,ValueFromPipeline=$true,Position=0)] [PSObject] $InputObject, # The algorithm to use. By default, MD5 [Parameter(Position=1)] [ValidateSet('MD5', 'SHA1', 'SHA256', 'SHA384', 'SHA512', 'HMAC')] [string] $Algorithm = 'MD5', # If set, will output an object containing the input, hash, and algorithm [Switch] $OutputObject, # If set, will output the hash bytes, instead of the hexadecimal encoding of the bytes [Switch] $AsByte ) process { $inBytes= if ($InputObject -is [Hashtable]) { [Text.Encoding]::Unicode.GetBytes((Write-PowerShellHashtable -InputObject $InputObject).Trim().ToLower()) } elseif ($inputObject -As [byte[]]) { $inputObject -As [byte[]] } elseif ($inputObject -is [string]) { [Text.Encoding]::Unicode.GetBytes(("$InputObject".Trim().ToLower())) } else { $hashtable = @{} foreach ($prop in $InputObject.psobject.properties) { $hashtable[$prop.Name] = $prop.value } [Text.Encoding]::Unicode.GetBytes((Write-PowerShellHashtable -InputObject $hashtable).Trim().ToLower()) } if (-not $inBytes) { $inBytes = ,0 -as [byte[]] } $hasher= ("Security.Cryptography.$Algorithm" -as [Type])::Create() $bytes = $hasher.ComputeHash($inBytes) if ($OutputObject) { $hash = @(foreach ($b in $bytes) {"{0:x}" -f $b }) -join '' $psOBj = New-Object PSObject Add-Member NoteProperty Algorithmn $Algorithm -InputObject $psObj -force Add-Member NoteProperty Input $inputObject -InputObject $psObj -force Add-Member NoteProperty Hash $hash -InputObject $psObj -force $psOBj } elseif ($asbyte) { $bytes } else { @(foreach ($b in $bytes) {"{0:x}" -f $b }) -join '' } } } |