The public key will be signed by a Certification Authority, and the result is a digital certificate (which can be in a CRT file) My point is: if you have a CRT file (aka certificate), it means a key pair was already generated and signed by a Certification Authority. There's no way to generate a new key from it (because it already has a key). Keyscape r2r 2048 key generator download.
Generate Crt Certificate Openssl
Common OpenSSL Commands with Keys and Certificates
Generate RSA private key with certificate in a single command
![Cert Cert](/uploads/1/2/5/7/125710413/266662177.png)