Powershell V2.0 SHA1 Calculation - loops

Question

I posted a question on Monday about how I can calculate SHA1 hash within powershell.
The resultant code was as follows:
$file = 'C:\Zip\File.zip'
$sha1 = New-Object System.Security.Cryptography.SHA1CryptoServiceProvider
[System.BitConverter]::ToString( $sha1.ComputeHash([System.IO.File]::ReadAllBytes($file)))
This code works perfectly and does what I need it to do, but at the moment I have to specify the file I want the SHA1 hash to be calculated for. Is there any way I can get it to calculate the hashes for each files within that 'zip' folder.
I've been attempting to do this for the last two days by using a loop etc, and I just haven't moved anywhere. It doesn't help that my PowerShell skills are appalling.
Any help is greatly appreciated.

Answer 1

So basically, you just want to
Get a list of all files within C:\Zip\ and
Apply that snippet of code to each of them.
You want to look into using ForEach loops (can also be expressed in shortened-form, for use with piping, like so: $var | % {<#do this for each #>}).
You can read more about ForEach loops on all over the internet - two sites I have great luck with for researching PowerShell topics are TechNet and the Hey, Scripting Guy! Blog. I'd suggest checking them out, and reading up.
This should be a good start:
$zips = Get-ChildItem 'C:\Zip\' -Filter *.zip
$sha1 = New-Object System.Security.Cryptography.SHA1CryptoServiceProvider
foreach ($file in $zips) {
$return = "" | Select Name, Hash
$return.name = $file.Name
$return.hash = [System.BitConverter]::ToString($sha1.ComputeHash([System.IO.File]::ReadAllBytes($file.FullName)))
Write-Output $return
}