I am working on a client-server application where server is web service which perform client authentication based on SSL client certificate. The client cert is issued by Root-CA -> Intermedia-CA-1 -> Intermedia-CA-2. I imported the cert to both user cert store and cert machine store.
Use WinHttpSetOption(request, WINHTTP_OPTION_CLIENT_CERT_CONTEXT, (LPVOID)pCertCtx, sizeof(*pCertCtx)) to set the client certificate.
WinHttp send both client certificate and the intermediate CAs when pCertCtx is searched from user store.
But WinHttp only send the client cert, does not send intermediate CAs, when pCertCtx is searched from local machine store or from in-memory cert store.
Why WinHttp has different behavior on these? Is there any options to force WinHttp always send both certificate and the chain?
Resolved by adding the intermedia ca to machine store.
Related
I am tryng to deploy my application in net core 2.1 with a client certificate in IIS.
To do that in IIS:
autentication configuration is disable
SSL is required
And I am autenticating with my pfx in mi local, and in the server is installed the certificate with .cer in trusted root.
But all the time i am getting the 403 error:forbidden.
¿How can i fix my problem?
If someone has the code or information or a video it will be so helpfully for me
first, check the iis log for the sub status code first which is located at %SystemDrive%\inetpub\logs\LogFiles.
if the error is 403.16 Forbidden: Client Certificate Untrusted or Invalid:
It seems that IIS 8.X is not using the Certificate Trust List by default, without this list client authentication via certificates will fail with the 403.16 error and the certificate is considered untrusted.
to resolve this issue you could try to set the below DWORD registry key:
SendTrustedIssuerList = 0 (stop sending a list of trusted root certification authorities during the TLS/SSL handshake process)
ClientAuthTrustMode = 2 (Set trust mode to Exclusive CA Trust, requires that a client certificate chain to either an intermediate CA certificate or root certificate in the caller-specified trusted issuer store.)
after doing changes restart the machine.
another thing is if you are using iis require SSL setting then set the client certificate to accept:
I am trying to make websocket connection to a backend server that uses a self-signed certificate. In firefox I've added an exception for the self-signed cert.
However my websocket connection wss:// fails to connect. I get a close event with code 1006 which is a catch all code.
Chrome and IE websockets work. Since I am using windows, I've installed the cert using certmgr.exe as a trusted cert.
My guess right now is that firefox websockets do not work with certificate exceptions and need to be trusted.
Has this scenario worked for anyone else?
Just in case it could help anyone, what is mentioned in OP's answer is not true at this time of writing (v61.0.1).
I navigated to the address of my WS server using https, as any WS server is practically an HTTP server, then the usual invalid certificate screen appeared and allowed me to add an exception. After that any wss connection made to the same host and port is successful.
Firefox works with secure websockets (wss://) only when the certificate of the site is trusted.
With a self-signed certificate I was able to browse the site by adding an exception to the certificate. The exception is not used for websockets and the connection was dropped during the ssl handshake.
Instead I created my own Root CA cert and then another signed cert for the webserver. In Options > View Certificates > Authorities I imported the Root cert. Now firefox is able to connect over secure websockets without any issue.
Firefox does not allow for importing of self-signed certs as Authorities. Windows Certificate manager allows importing of self signed certs into the "Trusted Root Certificate Authorities" list.
I'm having a Windows Store App (Metro App) which I want to connect a web service I built through HTTPS. And I am using a self-signed certificate for my web service. But when I tried to connect it from my App through System.Net.HttpClient.PostAsync I got an exception said
"The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel."
Inner exception said
"The remote certificate is invalid according to the validation procedure."
I know this is because I'm using a self-signed certificate. I remembered in .NET I can use System.Net.ServicePointManager.ServerCertificateValidationCallback so that my application can pass the validation if the thumbprint is mine.
But I cannot find the relevant class/method in Windows Store runtime. How can I do that?
First, you should ideally be using Windows.Web.HttpClient. On that API, you can use httpClient.HttpBaseProtocolFilter.IgnorableServerCertificateErrors to set the cert errors that you're willing to accept. You can choose to ignore the Untrusted error, for example, but you should then manually check the thumbprint before actually sending any data.
I have created HTTPS endpoint for my Cloud application (using Self signed certificate). One of the requirements of my application is requirement of Client Certificate. When i run my application i do not see a list of Client Certificates to choose from.
Does anyone have any idea on what Client Certificates are required & how they can be created?
I am planning to implement a small standalone program that will make a https request to a server. Does that require a valid ssl certificate in the client? How does the SSL handshake work in that case? Are there any security issues in the client not have an SSL certificate?
Apart from encrypting the network traffic, HTTPS is normally used to authenticate the server. That is, to give clients reassuring information about who owns the server, etc. For that to work, the client needs to inspect the trust chain in the certificate published by the server. For that to happen automatically, the client machine should have a certificate installed that describes a Certification Authority that issued the server's certificate. Normally such certificates are found on your machine in a store called "Trusted Root Certification Authorities" and most OS come with a set of common CAs already installed.
In addition, many web servers offer a feature where the client can authenticate itself to the server by supplying a client certificate. The web server is able to inspect the certificate coming from the client and map it onto a set of permissions on the server. This "client authentication" is not necessary for a working HTTPS session however, it's just an option.
In short, you don't actually need any certificate on the client, but you will probably want to have a root CA certificate in order to validate the server's identity. If you don't have that certificate it will be impossible for you to trust the server (unless you have another good reason to do so), but you might choose to exchange data with it anyway.
If you wish to learn more about the HTTPS handshake and what is negotiated, i fully recommend you look at this excellent write up at moserware
http://www.moserware.com/2009/06/first-few-milliseconds-of-https.html
A client certificate is required only if the server requires one. A client certificate allows the server to authenticate the client, but this is only useful if the server has a list of all authorized clients. That's generally not the case with a web server, so it's quite rare for them to require client certificates.
When present, the client-side certificate does not affect establishment of the secure channel. (Only the server's certificate is required for that and adding a client certificate into the mix doesn't change the process.) Once a secure channel is established, the server will use the client's certificate the authenticate the client (generally by comparing the client's public key or name with a list of authorized clients).
You dont need a certificate to make a HTTPS connection, but you do need to if you want to know with whom you are communicating.