Openssl genrsa -out your-key.key 2048 With the private key, you can then generate the CSR: openssl req -new -key your-key.key -out your-request.csr If you want to extract the public key from the CSR, all examples I've seen require the private key to be present in the openssl command. Nov 21, 2019  Above command will generate a private key in the file domain.key and certificate request in the file domain.csr and save it in your current directory. View and copy the contents of private key. You can view and store the private keys on your server that you may need later. However, the important thing is not to share it with anyone. Mar 03, 2020 This page explains how to generate public/private key pairs using OpenSSL command-line tools. Device authentication. Cloud IoT Core uses public key (or asymmetric) authentication: The device uses a private key to sign a JSON Web Token (JWT). The token is passed to Cloud IoT Core as proof of the device's identity.

For any live website, SSL Certificates have become a key requirement. A Certificate Authority (CA) verifies and issue SSL certificates. There are two categories of these certificates:

  • Self-Signed certificates: As the name implies, these are the certificates that are signed by the identity creating it rather than by a trusted certificate authority. It is Mostly used in an intranet environment for trial and development purposes.
  • CA Certificates: These certificates are signed by a trusted CA (Certificate Authority) such as Verisign, DigiCert, GoDaddy, Thawte, etc.

To obtain a self-signed SSL certificate or the one signed by a certificate authority, you first have to create a certificate signing request (CSR). After the CSR is generated, it is then submitted to a certificate authority to acquire an SSL certificate. CSR is a block of encrypted text that contains all the information including the organization’s name, country, city, email address, etc. required for the generation of an SSL certificate.

In this article, we will explain how to generate a CSR on a Linux server or desktop using the command line. We will use Debian 10 OS for describing the procedure mentioned in this article.

Getting Started

For generating CSR on a Debian OS, we will need OpenSSL tool. OpenSSL is an open-source tool widely used for generating a CSR. To check whether OpenSSL is installed or not, open the Terminal in your Debian OS and then type the below command:

If it is already installed in your system, it will return the following results.

Openssl Generate Development Private Key Mac

Installing OpenSSL

Openssl

If you do not see the above results, then you have to install OpenSSL as follows:

Enter the below command in the Terminal to switch to super user account.

Enter the required password. Then execute the below command to install OpenSSL.

Wait for a while until the installation of OpenSSL is completed.

Generating CSR

Run the following command to generate a private key and the CSR. The command syntax is as follows:

Replace domain in the above command with your own domain name.

Generate Key With Openssl

Enter a few details like Country name; State, Organization name, email address, etc. and make sure to enter the right information, as it will be later checked by a certificate authority.

Above command will generate a private key in the file domain.key and certificate request in the file domain.csr and save it in your current directory.

View and copy the contents of private key

You can view and store the private keys on your server that you may need later. However, the important thing is not to share it with anyone. Navigate to the directory where the key file is stored. Then run the below method in order to view the contents of the private key file:

Replace domain in the above command with your own domain name.

To copy the contents of the private key file, select and copy the entire content including the “BEGIN PRIVATE KEY” and “END PRIVATE KEY” tags.

Export Private Key Openssl

View and copy contents of CSR file

Openssl Generate Development Private Key Generator

To obtain an SSL certificate, you will need to send the certificate request to a certificate signing authority by copy-pasting the entire content of CSR file.

Openssl Generate Development Private Key Finder

To view the content of CSR file, navigate to the directory where the CSR file is stored. Then run the below method:

Replace domain in the above command with your own domain name.

Generate Certificate Private Key Openssl

To copy the contents of the CSR file, select and copy the entire content including the “BEGIN CERTIFICATE REQUEST” and “END CERTIFICATE REQUEST” tags.

That was all you need to know about generating a certificate signing request (CSR) in a Debian 10 OS. Now you can get an SSL certificate from certificate signing authority by pasting the content of CSR file on the order form when enrolling for SSL certificate.

How to Generate a SSL/TLS Certificate Signing Request (CSR) on Debian 10
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