The public key, but not the private key, of company A's key pair is included as part of the certificate request. The CA then uses company A's identity information to determine whether the request meets the CA's criteria for issuing a certificate.
Mar 31, 2018 IIS 10 Exporting/Importing SSL Certificates | digicert.com On the File to Export page, click Browse.In the Save As window, locate and select the certificate file that you want to export and then click Save.Finally, on the File to Export page, click Next.. Make sure to note the filename and the location where you saved your file. If you only enter the filename without selecting a location, your file is saved to the following location: C:\Windows\System32. Bookshelf v8.1/8.2: About Certificates and Key Files Used
Jul 16, 2020
How To Generate SSL Key, CSR and Self Signed Certificate Using the key generate above, you should generate a certificate request file (csr) using openssl as shown below. # openssl req -new -key www.thegeekstuff.com.key -out www.thegeekstuff.com.csr Enter pass phrase for www.thegeekstuff.com.key: You are about to be asked to enter information that will be incorporated into your certificate request. How To Create CA and Generate TLS/SSL Certificates & Keys Nov 24, 2018
Once certificate request is signed you get a standard X.509 certificate file. The problem occurs when you try to import this certificate to the Windows certificate store. Obviously it will be imported without private key because Certificate Import Wizard don't know anything about separate private key file.
Prerequisites for importing a certificate into ACM. X.509 version 3 certificates utilize public key algorithms. When you create an X.509 certificate or certificate request, you specify the algorithm and the key bit size that must be used to create the private–public key pair. Learn How to Recover your SSL/TLS Certificate’s Private Key Then, right-click on the certificate entry and click All Tasks > Export to get to the export wizard; Once this has been exported, you will get a .pfx file with the key contained within it. You can then convert that file to plain text, using a converter to switch it from a .pfx file into a PEM encoded file