Generate Certificate Using Openssl Private Key

11.12.202022.08.2017admin

Openssl Generate Key File
Openssl Generate Certificate From Private Key
Openssl Generate Public Private Key
Openssl Generate Certificate
Generate Certificate Using Openssl Private Keys

Aug 05, 2019 Now that you have created your test root certificate, you need to generate a certificate signing request (CSR) and use that to create your server certificate. First, create another private key and then generate the CSR using the following commands: openssl genrsa -out localhost.key 2048. Openssl req -new -key localhost.key -out localhost.csr. Common OpenSSL Commands with Keys and Certificates. Generate RSA private key with certificate in a single command openssl req -x509 -newkey rsa:4096 -sha256 -keyout example.key -out example.crt -subj '/CN=example.com' -days 3650 -passout pass:foobar Generate Certificate Signing Request (CSR) from private key with passphrase. Run the following OpenSSL command to generate your private key and public certificate. Answer the questions and enter the Common Name when prompted. Openssl req -newkey rsa:2048 -nodes -keyout key.pem -x509 -days 365 -out certificate.pem. Sep 12, 2014 Generate a CSR from an Existing Private Key. Use this method if you already have a private key that you would like to use to request a certificate from a CA. This command creates a new CSR (domain.csr) based on an existing private key (domain.key): openssl req -key domain.key -new -out domain.csr. Oct 25, 2019 Common OpenSSL Commands with Keys and Certificates. Generate RSA private key with certificate in a single command openssl req -x509 -newkey rsa:4096 -sha256 -keyout example.key -out example.crt -subj '/CN=example.com' -days 3650 -passout pass:foobar.

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.

Generate certificate using openssl private key code

We happy few key to generator room. 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.

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.

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Generate a certificate signing request

Before you can install a Secure Socket Layer (SSL) certificate, you must first generate a certificate signing request (CSR). You can do this by using one of the following methods:

OpenSSL

Openssl Generate Key File

The following sections describe how to use OpenSSL to generate a CSR for a single host name. If you want to generate a CSR for multiple host names, we recommend using the Cloud Control Panel or the MyRackspace Portal.

Install OpenSSL

Check whether OpenSSL is installed by using the following command:

CentOS® and Red Hat® Enterprise Linux®
The following output provides an example of what the command returns:
Debian® and the Ubuntu® operating system
The following output provides an example of what the command returns:

If the preceding packages are not returned, install OpenSSL by running the following command:

CentOS and Red Hat
Debian and the Ubuntu operating system

Generate the RSA key

Run the following commands to create a directory in which to store your RSA key, substituting a directory name of your choice:

Run the following command to generate a private key:

Create a CSR

Openssl Generate Certificate From Private Key

Run the following command to create a CSR with the RSA private key (output is in Privacy-Enhanced Mail (PEM) format):

When prompted, enter the necessary information for creating a CSR by using the conventions shown in the following table.

Note: You cannot use the following characters in the Organization Name or Organizational Unit fields: < > ~ ! @ # $ % ^ * / ( ) ? . , &

Field	Explanation	Example
Common Name	The fully qualified domain name to which the certificate applies. The domain names example.com and www.example.com are distinct from each other, so be sure to submit your request for the right domain. If you are purchasing a wildcard certificate, use *.example.com.	example.com
Organization Name	The exact legal name of your organization. The Certificate Authority (CA) might seek to confirm that your organization is real and legally registered, so don’t abbreviate words that aren’t abbreviated in the organization’s legal name.	Example Inc.
Organizational Unit	The branch of your organization that is making the request.	Marketing
City/locality	The city where your organization is legally located. Do not abbreviate the city name.	San Antonio
State/province	The state or province where your organization is legally located. Do not abbreviate the state or province name.	Texas
Country/region	The two-letter International Standards Organization (ISO) abbreviation for your country.	US

Warning: Leave the challenge password blank (press Enter).

Verify your CSR

Run the following command to verify your CSR:

After you have verified your CSR, you can submit it to a CA to purchase an SSL certificate.

Windows IIS Manager

Use the following steps to generate a CSR by using Windows IIS Manager:

Note: The following steps are for IIS 8 or IIS 8.5 on Windows Server 2012.

Open IIS Manager.
In the left-hand Connections pane, click the server for which you want to generate a CSR.
In the center server Home pane under the IIS section, double-click Server Certificates.
In the right-hand Actions pane, click Create Certificate Request.

In the Request Certificate wizard, on the Distinguished Name Properties page, enter the following information and then click Next.

Field	Explanation	Example
Common Name	The fully qualified domain name to which the certificate applies. The domain names example.com and www.example.com are distinct from each other, so be sure to submit your request for the right domain. If you are purchasing a wildcard certificate, use *.example.com.	example.com
Organization Name	The exact legal name of your organization. The CA might seek to confirm that your organization is real and legally registered, so don’t abbreviate words that aren’t abbreviated in the organization’s legal name.	Example Inc.
Organizational Unit	The branch of your organization that is making the request.	Marketing
City/locality	The city where your organization is legally located. Do not abbreviate the city name.	San Antonio
State/province	The state or province where your organization is legally located. Do not abbreviate the state or province name.	Texas
Country/region	The two-letter ISO abbreviation for your country.	US

On the Cryptographic Server Provider Properties page, enter the following information and then click Next.
- Cryptographic service provider: Unless you have a specific cryptographic provider, use the default selection.
- Bit length: 2048 is the recommended bit length.
On the File Name page, enter the location where you want to save the certificate request file and then click Finish.

After you have generated the CSR, you can submit it to a CA to purchase an SSL certificate.

Cloud Control Panel

Rackspace provides the CSR Generator for generating a CSR. The CSR Generator shows you the CSRs that you currently have and lets you create new CSRs with a simple form. After you have entered your details, the generator combines them with your private key so that you can submit the combined encoded information to a CA.

When you are done with the generator, you can return to the Cloud Control Panel by clicking any of the links in the top navigation or by going to login.rackspace.com and selecting Rackspace Cloud from the drop-down product menu in the top navigation bar.

Access the CSR Generator

Access the CSR Generator directly or through the Control Panel by using the following steps:

Log in to the Cloud Control Panel and select Rackspace Cloud from the drop-down product menu in the top navigation bar.
In the top navigation bar, click Servers > Cloud Servers.
Click the name of the server for which you want to generate a CSR.
In the right-hand Managing Your Server section under Help me with, click Generate a CSR.

The generator lists your existing CSRs, if you have any, organized by domain name.

Generate a CSR

Openssl Generate Public Private Key

Click Create CSR.

Enter the following information, which will be associated with the CSR:

Field	Explanation	Example
Domain Name	The fully qualified domain name to which the certificate applies. The domain names example.com and www.example.com are distinct from each other, so be sure to submit your request for the right domain. If you want to secure both domains, you can use the Alt Names field. If you are purchasing a wildcard certificate, use *.example.com.	example.com
Alt Names	(Optional) Additional domains that you want to add to the request. Each CA treats these differently, and the CA might charge for additional names. You can submit a comma-separated list.	www.example.com, secure.example.com
Email Address	(Optional) A contact email address for the certificate.	support@example.com
Organization Name	The exact legal name of your organization. The CA might seek to confirm that your organization is real and legally registered, so don’t abbreviate words that aren’t abbreviated in the organization’s legal name.	Example Inc.
Organizational Unit	(Optional) The branch of your organization that is making the request.	Marketing
City	The city where your organization is legally located. Do not abbreviate the city name.	San Antonio
State or Province	The state or province where your organization is legally located. Do not abbreviate the state or province name.	Texas
Country	Choose your country from the drop-down menu. The two-letter ISO abbreviation for your country is included in the CSR.	United States
Private Key Bit Length	Key sizes smaller than 2048 are considered insecure and might not be accepted by a CA.	1024,2048,4096
Hashing Algorithm	Both algorithms are currently trusted in mainstream browsers and offer industry recommended security. SHA-512 requires additional CPU processing.	SHA-256, SHA-512

Note: You cannot use the following characters in the Organization Name or Organizational Unit fields: < > ~ ! @ # $ % ^ * / ( ) ? . , &

After you have entered all the required information, click Create CSR.

It can take between 5 and 60 seconds for the CSR to be generated. You might need to refresh the page that displays your CSRs before the new CSR is listed.

Openssl Generate Certificate

View CSR details

When CSR has been generated, you can click its UUID (unique identifier) in the CSR list to view its details screen.

This screen displays the information that you provided, the text of the CSR, and its associated private key.

Submit the CSR to the CA

The text in the Certificate Request field is the CSR. It contains encoded details of the CSR and your public key.

To request your SSL certificate, copy the Certificate Request text and submit it to your CA. Include all the text, including the BEGIN and END lines at the beginning and end of the text block.