CODEWITHSUNDEEP
powershellhash
M.K
M.K

Reputation: 1505

Getting the Hash in MD5 Powershell

I am trying to make a script that can get the hash MD5 of Files and Directories that I get with the function ChildItem. My Script at the moment is the following. Why is the part of the Hash not working?

 $UserInput = Read-Host



 Get-ChildItem -Path $UserInput -Recurse  


function md5hash($UserInput)
{
    $fullPath = Resolve-Path $UserInput
    $md5 = new-object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider
    $file = [System.IO.File]::Open($fullPath,[System.IO.Filemode]::Open, [System.IO.FileAccess]::Read)
    [System.BitConverter]::ToString($md5.ComputeHash($file))
    $file.Dispose()
}

Upvotes: 1

Views: 9716

Answers (2)

k7s5a
k7s5a

Reputation: 1377

As a one-liner:

Get-ChildItem -Path C:\Temp -Recurse -File | Get-Filehash -Algorithm MD5

Upvotes: 2

thepip3r
thepip3r

Reputation: 2935

$someFilePath = "C:\foo.txt"
$md5 = New-Object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider
$hash = [System.BitConverter]::ToString($md5.ComputeHash([System.IO.File]::ReadAllBytes($someFilePath)))

Edit: Your code should work fine and even better than what I proposed as my example is limited to files < 2GB in size. Since yours uses a Stream, it's more efficient (doesn't load it all into memory first), and won't have the size limitation.

Your file path must be a file since you're making I/O calls specific to files...

Upvotes: 1

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