PowerShell/Scripts/check-mac-address.ps1

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#!/bin/powershell
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<#
.SYNTAX ./check-mac-address.ps1 [<MAC>]
.DESCRIPTION checks the given MAC address for validity
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MAC address like 00:00:00:00:00:00 or 00-00-00-00-00-00 or 000000000000
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.LINK https://github.com/fleschutz/PowerShell
.NOTES Author: Markus Fleschutz / License: CC0
#>
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param($MAC = "")
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function IsMACAddressValid { param([string]$mac)
$RegEx = "^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})|([0-9A-Fa-f]{2}){6}$"
if ($mac -match $RegEx) {
return $true
} else {
return $false
}
}
try {
if ($MAC -eq "" ) {
$MAC = read-host "Enter MAC address to validate"
}
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if (IsMACAddressValid $MAC) {
write-host -foregroundColor green "OK - MAC address $MAC is valid"
exit 0
} else {
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write-warning "Invalid MAC address: $MAC"
exit 1
}
} catch {
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write-error "ERROR: line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
exit 1
}