I wondering if it is at all possible to use an externally generated root CA ( and by external I mean an internal root CA that was created using another tool) and use it with OpenSSL to sign a CSR?
The guides I'm reading around creating my own certificate authority detail creating the private key and root ca certificate using OpenSSL itself, and then using this to sign CSRs.
What I want to know is, can I use and existing Root CA from another tool( providing I export the private key) and use this to sign a CSR ,also created from a different tool and not OpenSSL?
Any info and commands would be awesome as I'm new to this.