HTTPS Connection Issues
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Contents
Full Title or Meme
Like most security protocols HTTPS can start failing for all sorts of reasons, but issues with upgraded security seems to be most common.
Context
- For HTTPS to work the certificate (and key) used to sign the TLS (SSL) connection packets must match one of the certs in the cert:\localmachiroot folder. That means that the fingerprint (hash) of the root key must match the signing key.
Issues
Net Core Console Apps
Here are the steps:
- Create a Certificate Signing Request (CSR).
- Have the CSR signed by the server.
- Get the signed certificate.
- Include the signed certificate in the HTTP request.
- Make sure to put the Self-Signed CA Certificate in the Local Computer's Trusted Root CA store.
Troubleshooting steps in order (do not skip if a certain step is not successful):
- Test with HTTP
- Test with HTTPS (one-way authentication)
- Test with HTTPS (Mutual Authentication)
PowerShell Invoke-xxxMethod
$r = Invoke-RestMethod "https://trustregistry.us/csp" -Method Post -Body $j -ContentType "application/jose"
$r
The registry service https://localhost:5035/csp could not be found. Exception: The SSL connection could not be established, see inner exception.
or on AWS
$r = Invoke-RestMethod "http://localhost:5035/csp" -Method Post -Body $j -ContentType "application/jose"
Invoke-RestMethod : The underlying connection was closed: The connection was closed unexpectedly.
At line:1 char:6
+ $r = Invoke-RestMethod "http://localhost:5035/csp" -Method Post -Body ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-RestMethod], WebException
+ FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand
One common cause for this issue is a mismatch in TLS levels between the client and server. In general all sites should be (2020-07) set for tls1.1 or higher.
- Check with powershell Get-TlsCipherSuite [[-Name] <String>] [<CommonParameters>]
PowerShell Ignore SSL Errors
add-type @"
using System.Net;
using System.Security.Cryptography.X509Certificates;
public class TrustAllCertsPolicy : ICertificatePolicy {
public bool CheckValidationResult(
ServicePoint srvPoint, X509Certificate certificate,
WebRequest request, int certificateProblem) {
return true;
}
}
"@
[System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy
$result = Invoke-WebRequest -Uri "https://trustregistry.us
StatusCode : 200
StatusDescription : OK
Content : <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Trust Registry Home - TrustRegistry</title>...
RawContent : HTTP/1.1 200 OK
Transfer-Encoding: chunked
Content-Type: text/html; charset=utf-8
Date: Wed, 22 Sep 2021 03:17:41 GMT
Server: Kestrel
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="...
Forms : {}
Headers : {[Transfer-Encoding, chunked], [Content-Type, text/html; charset=utf-8], [Date, Wed, 22 Sep 2021
03:17:41 GMT], [Server, Kestrel]}
Images : {@{innerHTML=; innerText=; outerHTML=<IMG class=img-responsive style="WIDTH: 90%" alt="TR is Trust
Registry" src="/images/TRBanner.png" height=120>; outerText=; tagName=IMG; class=img-responsive;
style=WIDTH: 90%; alt=TR is Trust Registry; src=/images/TRBanner.png; height=120}}
InputFields : {}
Links : {@{innerHTML=TrustRegistry; innerText=TrustRegistry; outerHTML=<A class=navbar-brand
href="/?page=%2FIndex">TrustRegistry</A>; outerText=TrustRegistry; tagName=A; class=navbar-brand;
href=/?page=%2FIndex}, @{innerHTML=Home; innerText=Home; outerHTML=<A class="nav-link text-dark"
href="/">Home</A>; outerText=Home; tagName=A; class=nav-link text-dark; href=/},
@{innerHTML=VICAL; innerText=VICAL; outerHTML=<A class="nav-link text-dark"
href="/Home/Certification">VICAL</A>; outerText=VICAL; tagName=A; class=nav-link text-dark;
href=/Home/Certification}, @{innerHTML=Resources; innerText=Resources; outerHTML=<A
class="nav-link text-dark" href="/Home/Resources">Resources</A>; outerText=Resources; tagName=A;
class=nav-link text-dark; href=/Home/Resources}...}
ParsedHtml : mshtml.HTMLDocumentClass
RawContentLength : 6888
Set .NET to Ignore Certificate Errors
Add a certificate validation handler. Returning true will allow ignoring the validation error:
ServicePointManager .ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true;
This is even more useful than it may at first appear. I ran into the OP's problem while using Managed Exchanged Web Services (EWS). I thought that I could not use this answer since I didn't have access to the low-level SOAP calls that were being made by that managed library. But when I took another look at it, I realized ServicePointManager stands on its own. So,I added the above callback before initializing the ExchangeService and it worked like a charm. – Mark Meuer Apr 19 '12 at 21:50
or this way - Call this method before you call smtpclient.Send():
[Obsolete("Do not use this in Production code!!!",true)]
static void NEVER_EAT_POISON_Disable_CertificateValidation()
{
// Disabling certificate validation can expose you to a man-in-the-middle attack
// which may allow your encrypted message to be read by an attacker
// https://stackoverflow.com/a/14907718/740639
ServicePointManager.ServerCertificateValidationCallback =
delegate (
object s,
X509Certificate certificate,
X509Chain chain,
SslPolicyErrors sslPolicyErrors
) {
return true;
};
}
