How to use Apache mod_ssl/OpenSSL to generate CSR ?

Written by Pravin on November 14, 2008 – 11:55 pm -

Certificate Signing Request (CSR) contains all the information regarding certificate application. It also includes the Public key.

Following steps will show how to generate a pair of private key and public Certificate Signing Request (CSR) for a webserver, “server” using Apache mod_ssl/OpenSSL.

root@vps [~]# openssl req -new -nodes -keyout vps.key -out vps.csr

This creates a two files. The file vps.key contains a private key;

Following is the output from the above command, you will have to fill some of the fields here:

root@vps [~]# openssl req -new -nodes -keyout vps.key -out vps.csr

Generating a 1024 bit RSA private key
writing new private key to ‘vps.key’
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter ‘.’, the field will be left blank.
Country Name (2 letter code) [GB]:GB
State or Province Name (full name) [Berkshire]:Berkshire
Locality Name (eg, city) [Newbury]:Newbury
Organization Name (eg, company) [My Company Ltd]:Trulymanaged
Organizational Unit Name (eg, section) []:Webhosting
Common Name (eg, your name or your server’s hostname) []
Email Address []

Please enter the following ‘extra’ attributes
to be sent with your certificate request
A challenge password []:sdfhsdfj
An optional company name []:

Your CSR will now have been created. Open the vps.csr in a text editor and copy and paste the contents into the online enrollment form when requested.

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