Continuation of the chain of certification?

Question

Digital certificates

Let's Encrypt and many other certificate authorities issue a personal certificate (public key), a private key (private key), a root CA certificate, and an intermediate CA certificate. Is it possible to sign your certificate with public and private keys via OpenSSL and thus extend the certification chain?

Answer 1

The certificate indicates its purpose (role). Typically, certificates that are issued to users cannot be used to sign other certificates. To do this, you need a certificate of the CA or an intermediate CA. Obtaining an intermediate CA authority certificate is not easy.