SSL works on 2 keys: public and private.
Private key
Stored on your server. Never share. If lost — reissue the certificate.
CSR (Certificate Signing Request)
Generated from the private key, contains the public key and company info. Sent to the CA.
Certificate (.crt)
The CA signs your CSR and returns the certificate.
On Sayt.uz
CSR and keys are generated server-side. Bundled ZIP is downloadable in your cabinet.