Generating a Certificate Signing Request (CSR) using OpenSSL (Apache & mod_ssl, NGINX)
A CSR is a file containing your certificate application information, including your Public Key. Generate your CSR and then copy and paste the CSR file into the web form in the enrollment process:
Generate keys and certificate: To generate a pair of private key and public Certificate Signing Request (CSR) for a webserver, 'server', use the following command: openssl req -nodes -newkey rsa:2048 -keyout myserver.key -out server.csr. This creates a two files. The file myserver.key contains a private key; do not disclose this file to anyone. The private key is generated and saved in a file named 'rsa.private' located in the same folder. Generating the Public Key - Linux 1. Open the Terminal. Type the following: openssl rsa -in rsa.private -out rsa.public -pubout -outform PEM 2. The public key is saved in a file named rsa.public located in the same folder.
Nov 06, 2019 It's also possible to generate keys using openssl only: openssl genrsa -out private.pem 2048 openssl rsa -in private.pem -pubout -out. Generate rsa key openssl.
Generate keys and certificate:
To generate a pair of private key and public Certificate Signing Request (CSR) for a webserver, 'server', use the following command :
This creates a two files. The file myserver.key contains a private key; do not disclose this file to anyone. Carefully protect the private key.
In particular, be sure to backup the private key, as there is no means to recover it should it be lost. The private key is used as input in the command to generate a Certificate Signing Request (CSR).
You will now be asked to enter details to be entered into your CSR.
What you are about to enter is what is called a Distinguished Name or a DN.
For some fields there will be a default value, If you enter '.', the field will be left blank.
Please enter the following 'extra' attributes to be sent with your certificate request
Openssl Create Private Key
Use the name of the web-server as Common Name (CN). If the domain name (Common Name) is mydomain.com append the domain to the hostname (use the fully qualified domain name).
The fields email address, optional company name and challenge password can be left blank for a webserver certificate.
Your CSR will now have been created. Open the server.csr in a text editor and copy and paste the contents into the online enrollment form when requested.
Alternatively one may issue the following command to generate a CSR:
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Openssl Create Key Pair
Note: If the '-nodes' is entered the key will not be encrypted with a DES pass phrase.
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