Created
September 5, 2024 10:17
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Get thumbprint of invalid SSL cert using old powershell
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| $myUrl = "https://my-url-with-invalid-cert" | |
| Function Get-SSLThumbprint { | |
| param( | |
| [Parameter( | |
| Position=0, | |
| Mandatory=$true, | |
| ValueFromPipeline=$true, | |
| ValueFromPipelineByPropertyName=$true) | |
| ] | |
| [Alias('FullName')] | |
| [String]$URL | |
| ) | |
| add-type @" | |
| using System.Net; | |
| using System.Security.Cryptography.X509Certificates; | |
| public class IDontCarePolicy : ICertificatePolicy { | |
| public IDontCarePolicy() {} | |
| public bool CheckValidationResult( | |
| ServicePoint sPoint, X509Certificate cert, | |
| WebRequest wRequest, int certProb) { | |
| return true; | |
| } | |
| } | |
| "@ | |
| [System.Net.ServicePointManager]::CertificatePolicy = new-object IDontCarePolicy | |
| [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 | |
| # Need to connect using simple GET operation for this to work | |
| Invoke-RestMethod -Uri $URL -Method Get | Out-Null | |
| $ENDPOINT_REQUEST = [System.Net.Webrequest]::Create("$URL") | |
| $SSL_THUMBPRINT = $ENDPOINT_REQUEST.ServicePoint.Certificate.GetCertHashString() | |
| return $SSL_THUMBPRINT -replace '(..(?!$))','$1:' | |
| } | |
| # Example output | |
| Get-SSLThumbprint $myUrl |
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