How to check client certificate in OpenSSL?

How do I get a client certificate?

How do I upload the client certificate to the Azure Service Bus account?

Do I need to take additional steps beyond using the generated client certificate?

It turns out that in order to generate the client certificate I need to run the msi-package.cmd command. In addition, the command line does not show any prompts, so I did not realize it was failing until much later. The msi-package command is part of the Service Bus Powershell module installed by the SbCluster toolkit. Here is what the msi-package command does:
Mci sbc.msi /quiet /norestart mci sbcclient.msi /quiet /norestart mci sbcserver.msi /quiet /norestart mci sbcservice.msi /quiet /norestart mci sbctray.msi /quiet /norestart The /quiet switch is necessary if you are going to run the command from the command line. If you attempt to run the command from the Package Manager Console (by starting the console and typing msi-package) then it displays the message: The command completed successfully. But if you try to run the command from the command line, then the error message below occurs: Error executing process: C:Windowssystem32msi-package.exe C:Program Files (x86)Microsoft Visual Studio2017EnterpriseMSBuildMicrosoftWindowsServiceBusMicrosoft.WindowsAzure.targets(1261,5): error : A call to PSSUCCESS failed with return code 2.
at Microsoft.Utilities.FallbackLogger.Log(System.String message, Exception exception)
at Microsoft.LoggingHelper.WriteLineIf(String message)
at Microsoft.BackEnd.WriteLineIf(String message)
at Microsoft.WriteLineIf(String message) at Microsoft.WriteLineIf(String message)

How to check client certificate in OpenSSL?

I have a server, which will be used for SSL communication.

Server is running on Ubuntu 10.04 and it's apache with modssl. How to check if client certificate is working fine? Is it possible to check it with openssl

SSL client certificates are not used to authenticate the identity of the client to the server, but rather they are used to authenticate the server to the client. When a client connects to a server using a SSL connection, the server will verify the certificate of the client and use that certificate to determine which certificate authority signed the client's certificate. The client certificate is verified by the server using the public key of the certificate. If the certificate is valid, the server then uses the public key contained in the certificate to decrypt the contents of the client certificate.

This process is repeated on the client side and when the server is satisfied that the certificate is valid, it will issue a certificate to the client which will be used to establish a secure connection between the client and the server. To determine if the client certificate is valid, you would use the -verify command line option of openssl when communicating with the server. This will verify the certificate against a specific CA or a chain of CAs.

You can use openssl's -verify option to check whether the client certificate is valid. Openssl sclient -connect yourserver.com:443 -showcerts This command will list all the certificates and you can check the validity of them.