Contents
Can I use a self-signed certificate?
In many organizations the use of self-signed certificates is forbidden by policy. For many uses of public key infrastructure (PKI), the correct method for signing a certificate is to use a well-known, trusted third party, a certificate authority (CA). “In a CA-based PKI system, the CA must be trusted by both parties.
How server and client certificates help ensure mutual authentication?
Server sends Certificate message, which contains the server’s certificate. Server requests client’s certificate in CertificateRequest message, so that the connection can be mutually authenticated. Server concludes its part of the negotiation with ServerHelloDone message.
Why would you use a self-signed certificate?
When used properly, it ensures web customers that the site they are visiting does, in fact, belong to you. SSL certificates also helps to enable secure http (HTTPS) on your website, thereby securing transactions of various sorts. For those not in the know, there is always the self-signed certificate.
How does a certificate work in mutual TLS?
In mutual TLS, during client-authentication phase, a client proves its identity to the server by sending its client certificate ( Certificate message). Additionally, it signs all previous handshake messages using its private key and sends the resulting hash ( CertificateVerify message).
Do you need a private key to send a client CERT?
Yes, you really need to use the private key, even if the client cert is self-signed, even if it’s issue by a private CA. Sending a client cert without using the private key is like showing your ID to a bouncer without showing your face. You need to use the private key in order to prove that you are the owner of the public key in the certificate.
When does a server issue a certificate to a client?
Usually, when server issues client certificate to a particular client – it supplies key+cert (often bundled into a single P12 or PFX file, or PEM file with both parts concatenated), and all client APIs (OpenSSL, curl, Node.js request, etc.) expect both key and cert to be supplied.