Generate A Private Key From Certificate
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If you want to convert your website from HTTP to HTTPS, you need to get a SSL certificate from a valid organization like Verisign or Thawte. You can also generate self signed SSL certificate for testing purpose.

In this article, let us review how to generate private key file (server.key), certificate signing request file (server.csr) and webserver certificate file (server.crt) that can be used on Apache server with mod_ssl.

I need to create a public/private key pair for a certificate request. I would like to use IIS. Once the certificate is signed I will be distributing it to multiple servers. This article shows you how to create a self-signed root certificate and generate client certificates using PowerShell on Windows 10 or Windows Server 2016. If you are looking for different certificate instructions. Export the self-signed root certificate and private key to store it (optional). To backup, export an SSL certificate with its private key and intermediates perform the following steps. Step 1: Create an MMC Snap-in for Managing Certificates on the first Windows system where the SSL certificate is installed. Start run MMC. Go into the Console Tab File Add/Remove Snap-in. You upload the digital certificate to the custom connected app that is also required for JWT-based authorization. You can use your own private key and certificate issued by a certification authority. Alternatively, you can use OpenSSL to create a key and a self-signed digital certificate. Jul 08, 2009 For testing purpose, you can generate a self-signed SSL certificate that is valid for 1 year using openssl command as shown below. You can use this method to generate Apache SSL Key, CSR and CRT file in most of the Linux, Unix systems including Ubuntu, Debian, CentOS, Fedora and Red Hat.

Key, CSR and CRT File Naming Convention

I typically like to name the files with the domain name of the HTTPS URL that will be using this certificate. This makes it easier to identify and maintain.

  • Instead of server.key, I use www.thegeekstuff.com.key
  • Instead of server.csr, I use www.thegeekstuff.com.csr
  • Instead of server.crt, I use www.thegeekstuff.com.crt
Generate

1. Generate Private Key on the Server Running Apache + mod_ssl

First, generate a private key on the Linux server that runs Apache webserver using openssl command as shown below.

The generated private key looks like the following.

2. Generate a Certificate Signing Request (CSR)

Generate Private Key From Certificate Openssl

Using the key generate above, you should generate a certificate request file (csr) using openssl as shown below.

3. Generate a Self-Signed SSL Certificate

For testing purpose, you can generate a self-signed SSL certificate that is valid for 1 year using openssl command as shown below.


You can use this method to generate Apache SSL Key, CSR and CRT file in most of the Linux, Unix systems including Ubuntu, Debian, CentOS, Fedora and Red Hat.

4. Get a Valid Trial SSL Certificate (Optional)

Instead of signing it youself, you can also generate a valid trial SSL certificate from thawte. i.e Before spending the money on purchasing a certificate, you can also get a valid fully functional 21 day trial SSL certificates from Thawte. Access key blanks. Once this valid certificate works, you can either decide to purchase it from Thawte or any other SSL signing organization.

This step is optional and not really required. For testing purpose, you can always use the self-signed certificate that was generated from the above step.

Go to Thwate trial certificate request page and do the following:

  • Select “SSL Web Server Certificate (All servers)” under the “select your trial certificate”.
  • Do not check the PKCS #7 check-box under the “configure certificate”
  • Copy/Paste the *.csr file that you generate above in the textbox under “certificate signing request (CSR)”
  • Click on next at the bottom, which will give you a 21-day free trial certificate.


Copy/Paste the trial certificate to the www.thegeekstuff.com.crt file as shown below.

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Get Private Key From Certificate

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