-
-
Save calebbaker/7ff438e9369718eb51341a2dcfef8ef4 to your computer and use it in GitHub Desktop.
PowerShell script to retrieve the public X509 certificate from a remote TLS endpoint
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
[CmdletBinding()] | |
param ( | |
[Parameter(Mandatory=$true)] | |
[string] | |
$ComputerName, | |
[int] | |
$Port = 443 | |
) | |
$Certificate = $null | |
$TcpClient = New-Object -TypeName System.Net.Sockets.TcpClient | |
try { | |
$TcpClient.Connect($ComputerName, $Port) | |
$TcpStream = $TcpClient.GetStream() | |
$Callback = { param($sender, $cert, $chain, $errors) return $true } | |
$SslStream = New-Object -TypeName System.Net.Security.SslStream -ArgumentList @($TcpStream, $true, $Callback) | |
try { | |
$SslStream.AuthenticateAsClient('') | |
$Certificate = $SslStream.RemoteCertificate | |
} finally { | |
$SslStream.Dispose() | |
} | |
} finally { | |
$TcpClient.Dispose() | |
} | |
if ($Certificate) { | |
if ($Certificate -isnot [System.Security.Cryptography.X509Certificates.X509Certificate2]) { | |
$Certificate = New-Object -TypeName System.Security.Cryptography.X509Certificates.X509Certificate2 -ArgumentList $Certificate | |
} | |
Write-Output $Certificate | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment