Forked from jstangroome/Get-RemoteSSLCertificate.ps1
Created
January 18, 2021 11:11
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PowerShell script to retrieve the public SSL certificate from a remote SSL endpoint
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[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 | |
} |
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