Functions/Get-Md5Sum.ps1
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function Get-Md5Sum { <# .SYNOPSIS To calculate an Md5Sum for a file .DESCRIPTION To calculate an Md5Sum for a file .PARAMETER Path The path to the file you wish to calculate the Md5Sum. Can be a single string or an array of strings. Can also accept pipeline input. Aliased to 'File' and 'FileName' .PARAMETER IncludeInput Switch to include input in the output stream. Aliased to 'IncludeFile' .EXAMPLE Assume you have a file that has 4 lines of text in it as follows unicorn unicorn unicorn unicorn cat cat cat dog dog fish .EXAMPLE Get-Md5Sum -Path .\sample.txt 351a0b1fd339ec74e3ddd2ddde694d82 .EXAMPLE Get-Md5Sum -Path .\sample.txt -IncludeInput File Md5Sum ---- ------ .\sample.txt 351a0b1fd339ec74e3ddd2ddde694d82 #> [CmdletBinding()] [alias('Md5Sum')] [OutputType('string')] Param ( [parameter(ValueFromPipeLine, ValueFromPipeLineByPropertyName)] [Alias('FileName', 'File')] [string[]] $Path, [Alias('IncludeFile')] [switch] $IncludeInput ) begin { Write-Verbose -Message "Starting [$($MyInvocation.Mycommand)]" } process { foreach ($currentFile in $Path) { Try { if (Test-Path -Path $currentFile) { Write-Verbose -Message "File exists: $currentFile" $md5 = New-Object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider Write-Verbose -Message "MD5object: $md5" $hash = [System.BitConverter]::ToString($md5.ComputeHash([System.IO.File]::ReadAllBytes($(Resolve-Path -Path $currentFile)))) Write-Verbose -Message "Hash: $hash" $hash = $($hash -replace '-', '').ToLower() Write-Verbose -Message "Calculating MD5Sum for file: '$currentFile'" } else { Write-Verbose -Message "The file specified does not exist: '$currentFile'" $hash = 'ERROR' } if ($IncludeInput) { New-Object -TypeName 'psobject' -Property ([ordered] @{ File = $currentFile Md5Sum = $hash }) } else { Write-Output -InputObject $hash } } catch { Write-Verbose -Message "Get-Md5Sum encountered an error for file [$currentFile]" } } } end { Write-Verbose -Message "Ending [$($MyInvocation.Mycommand)]" } } |