Get Hashes from Texts

by May 17, 2019

Before the advent of PowerShell 5 (and Get-FileHash), to calculate hashes for strings and files, you’d need to resort to pure .NET methods. Here is sample code to create a MD5 hash for a string:

$Text = 'this is the text that you want to convert into a hash'

$Provider = New-Object -TypeName Security.Cryptography.MD5CryptoServiceProvider
$Encodiner = New-Object -TypeName Text.UTF8Encoding

$Bytes = $Encodiner.GetBytes($Text)
$hashBytes = $Provider.ComputeHash($Bytes)
$hash = [System.BitConverter]::ToString($hashBytes)

# remove dashes if needed
$hash -replace '-'

If you’d like to calculate a hash for a file content, either use Get-Content to read the file, or try this:

$Path = "C:\somefile.txt"

# use your current PowerShell host as a sample
$Path = Get-Process -Id $Pid | Select-Object -ExpandProperty Path

$Provider = New-Object -TypeName Security.Cryptography.MD5CryptoServiceProvider
$FileContent = [System.IO.File]::ReadAllBytes($Path)
$hashBytes = $Provider.ComputeHash($FileContent)
$hash = [System.BitConverter]::ToString($HashBytes)

$hash -replace '-' – PowerShell Conference EU 2019 – June 4-7, Hannover Germany – visit There aren’t too many trainings around for experienced PowerShell scripters where you really still learn something new. But there’s one place you don’t want to miss: PowerShell Conference EU – with 40 renown international speakers including PowerShell team members and MVPs, plus 350 professional and creative PowerShell scripters. Registration is open at, and the full 3-track 4-days agenda becomes available soon. Once a year it’s just a smart move to come together, update know-how, learn about security and mitigations, and bring home fresh ideas and authoritative guidance. We’d sure love to see and hear from you!

Twitter This Tip! ReTweet this Tip!