Check-SSL.ps1

Check-SSL.ps1

<#
.SYNOPSIS
	Check if SSL certificate of a specific site will expire within a given threshold.
.DESCRIPTION
	Check if SSL certificate of a specific site will expire within a given threshold.

.PARAMETER Threshold
	Set the threshold in days to check if the SSL expires within that threshold.
.PARAMETER WebsiteURL
	List the websites to check (comma separated)
.PARAMETER SendMail
	If specified, The script will send a mail for every expiring website.
.PARAMETER from
	List the websites to check (comma separated).
.PARAMETER pass
	Specify the password for your mail address
.PARAMETER to
	List the mail addresses you want the script to send mails to (comma separated).
.PARAMETER SmtpServer
	Specify your SMTP server
.EXAMPLE
	.\Check-SSL.ps1
	Runs the script with defaults written within the script
.EXAMPLE
	.\Check-SSL.ps1 -Threshold 30 -WebsiteURL https://www.google.com , https://www.youtube.com 
	Checks Google.com and Youtube.com if their SSL will expire in 30 days.
	Provides results in the PowerShell window only.
.EXAMPLE
	.\Check-SSL.ps1 -Threshold 30 -WebsiteURL https://www.google.com , https://www.youtube.com -SendMail -from scripts@contoso.com -to john@gmail.com -SmtpServer smtp.contoso.com -pass P@55w0rd
	Checks Google.com and Youtube.com if their SSL will expire in 30 days.
	Provides results in the PowerShell window & sends a mail for every expiring site or error to john@gmail.com
.NOTES
    Author:             Dima Kantargi
    website:            http://www.DimusTech.net

    Changelog:
        1.0  (20.08.2016)           Initial Release
.LINK
	http://www.DimusTech.net
	http://www.dimustech.net/2016/08/check-ssl.html
#>
[CmdletBinding()]
Param (
	[string]$Threshold = 30,    
	
	[string[]]$WebsiteURL = ("https://google.com","https://youtube.com"),
	
	$from = "john@gmail.com",
	
	$pass = "MY-PASSWORD",
	
	$to = ("john1@gmail.com", "john2@gmail.com"),
	
	$SmtpServer = "smtp.gmail.com",
	
	[switch]$SendMail

)
	$secpasswd = (ConvertTo-SecureString "$pass" -AsPlainText -Force)
	$mycreds = New-Object System.Management.Automation.PSCredential ($from, $secpasswd)

foreach ($site in $WebsiteURL)
{
try {
[Net.HttpWebRequest] $req = [Net.WebRequest]::create($site)
$req.Method = "GET"
$req.Timeout = 10000 # = 10 Seconds
[Net.HttpWebResponse] $result = $req.GetResponse()
[IO.Stream] $stream = $result.GetResponseStream()
$cert = $req.ServicePoint.Certificate
$ValidTo = [datetime]::Parse($Cert.GetExpirationDatestring())
$ValidDays = $($ValidTo - [datetime]::Now).Days
if ($ValidDays -lt $Threshold)
        {
        Write-Host "`nStatus: Warning $site Expires in $ValidDays days" -ForegroundColor Yellow
        Write-Host "CertExpiration: $ValidTo`n" -ForegroundColor Yellow
		if ($SendMail)
		{
		$Subject = "Warning $site SSL Expires in $ValidDays days" 
		$Body = "Warning $site SSL Expires in $ValidDays days" 
		#Send-mail -server $SmtpServer -from $from -tos $to -subject $Subject  -body $Body
		Send-MailMessage  -To $to -From $from -Subject $Subject -Body $Body -BodyAsHTML -SmtpServer $SmtpServer -port 587 -UseSsl -credential $mycreds
		}
        } else {
			Write-Host "$site : SSL still good" -ForegroundColor Green
		}
		
[IO.StreamReader] $reader = New-Object IO.StreamReader($stream)
[string] $output = $reader.readToEnd()
$stream.flush()
$stream.close()
} catch {
 Write-Host "Error occured while checking $site `nThe Error: $_ "-ForegroundColor Red
 if ($SendMail)
		{
		$Subject = "Error has occured while running SSL-Check script" 
		$Body = "Error occured while checking $site <br/> The Error: $_ " 
		Send-MailMessage  -To $to -From $from -Subject $Subject -Body $Body -BodyAsHTML -SmtpServer $SmtpServer -port 587 -UseSsl -credential $mycreds
		}
 
}

}
exit 1