To help readers better visualize what's happening under the hood, I've enhanced a code example taken from the Microsoft website so that both client and server are capable of authenticating each other using the mutual SSL authentication. The code sample is very simple, and I won't illustrate much here. Basically, what it does is the client application sends a " Hello from the client. To capture the handshake messages transacted between the client and server, I use one of the popular and open-source packet analyzer tools called WireShark.
It is a powerful and easy to use packet capture and analyzer tool, which can captures messages over a hundred of protocols. To learn more about how you can make use of this tool, please visit its website. However, due to the lack of supported Loopback Interface in Windows operating system, I've to setup the client and server application running on two different machines in order to use Wireshark to capture their handshake messages.
The handshake messages captured while running the applications are shown in the screenshot below, and the IP address " The server responds by sending a certificate. Is this a certificate that the client accepts? If yes, a message is sent to the server accepting the certificate and a secure channel is initiated. If the certificate is not accepted, it may mean that the root authority is needed for certification. Administrators do the preliminary work of setting up a keystore and generating certificates before certification requests are fulfilled.
Warning: This feature only enables mutual authentication on outbound https connections. The following steps use commands that allow you to generate a new Java Keytool keystore file, create a certificate signing request CSR , and import certificates. Any root or intermediate certificates need to be imported before importing the primary certificate for your domain.
Type these commands in a command line interface. Generate a Java keystore and key pair. Now that the key store has been created, it can be uploaded to the Certificates table. Customer Success We'll implement the cloud for you Learn More. Explore Customer Stories. Partners Partner Programs Partner Login. Developers Back. Pricing Back. Search the site:. Explore our blog. Mutual TLS: Stuff you should know. Step 2: Configure your web server The following information is for the apache 2.
There could be any of several reasons for this problem: DocuSign was not configured to respond to the mutual TLS certificate request. Or the root distinguished name sent to the client during the handshake was either missing or wrong.
Mutual TLS must be requested by the server the Connect listener. Note that Mutual TLS is a useful but not sufficient defense, access control should also be used and access control is only possible on the server.
Web servers have a setting that requires clients to support Mutual TLS. Is that option available? No, only one or the other is available for a Connect configuration. If Mutual TLS is enabled, then the option for digitally signing the notification messages is ignored.
I understand that the Mutual TLS Request Certificate handshake message includes one or more distinguished names that the server trusts. What else does it contain? The DocuSign client certificates use the SHA hash algorithm, so it must be included in the list of acceptable hash algorithms sent by the server.
Updates This post was updated on February 13, to include information about the bit root certificate that can also be used to verify the DocuSign Connect certificate and its included intermediate bundle.
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