Jun 09, 2019 To assign the existing private key to a new certificate, you must use the Microsoft Windows Server 2003 version of Certutil.exe. To do this, follow these steps: Log on to the computer that issued the certificate request by using an account that has administrative permissions. A private key is usually created at the same time that you create the CSR, making a key pair. A CSR is generally encoded using ASN.1 according to the PKCS #10 specification. A certificate authority will use a CSR to create your SSL certificate, but it does not need your private key. You need to keep your private key. Jul 09, 2019 If the Private Key key file is lost, you’ll need to reissue your Certificate. Can I generate a new Private Key for my Certificate if I lose the old one? You can generate a new private key and CSR, or use the automatic CSR and key generation during Certificate reissue (this option is available for all Certificates except for the Multi. Crt and key files represent both parts of a certificate, key being the private key to the certificate and crt being the signed certificate. It's only one of the ways to generate certs, another way would be having both inside a pem file or another in a p12 container.
The following instructions will guide you through the CSR generation process on Nginx (OpenSSL). To learn more about CSRs and the importance of your private key, reference our Overview of Certificate Signing Request article. If you already generated the CSR and received your trusted SSL certificate, reference our SSL Installation Instructions and disregard the steps below.
1. Log in to your server’s terminal.
You will want to log in via Secure Shell (SSH).
2. Enter CSR and Private Key command
Generate a private key and CSR by running the following command:
Here is the plain text version to copy and paste into your terminal:
Note:Replace “server ” with the domain name you intend to secure.
3. Enter your CSR details
Enter the following CSR details when prompted:
- Common Name: The FQDN (fully-qualified domain name) you want to secure with the certificate such as www.google.com, secure.website.org, *.domain.net, etc.
- Organization: The full legal name of your organization including the corporate identifier.
- Organization Unit (OU): Your department such as ‘Information Technology’ or ‘Website Security.’
- City or Locality: The locality or city where your organization is legally incorporated. Do not abbreviate.
- State or Province: The state or province where your organization is legally incorporated. Do not abbreviate.
- Country: The official two-letter country code (i.e. US, CH) where your organization is legally incorporated.
Note: You are not required to enter a password or passphrase. This optional field is for applying additional security to your key pair.
4. Generate the order
Locate and open the newly created CSR in a text editor such as Notepad and copy all the text including:
Note 1: Your CSR should be saved in the same user directory that you SSH into unless otherwise specified by you.
Note 2: We recommend saving or backing up your newly generate “.key ” file as this will be required later during the installation process.
Return to the Generation Form on our website and paste the entire CSR into the blank text box and continue with completing the generation process.
How Do I Generate A Csr And Private Keys
Upon generating your CSR, your order will enter the validation process with the issuing Certificate Authority (CA) and require the certificate requester to complete some form of validation depending on the certificate purchased. For information regarding the different levels of the validation process and how to satisfy the industry requirements, reference our validation articles.
After you complete the validation process and receive the trusted SSL Certificate from the issuing Certificate Authority (CA), proceed with the next step using our SSL Installation Instructions for Nginx using OpenSSL.