OpenSSL One liner to create self signed certificate
Published: 09-10-2013 | Author: Remy van Elst | Text only version of this article
❗ This post is over ten years old. It may no longer be up to date. Opinions may have changed.
Recently I removed all Google Ads from this site due to their invasive tracking, as well as Google Analytics. Please, if you found this content useful, consider a small donation using any of the options below:
I'm developing an open source monitoring app called Leaf Node Monitoring, for windows, linux & android. Go check it out!
Consider sponsoring me on Github. It means the world to me if you show your appreciation and you'll help pay the server costs.
You can also sponsor me by getting a Digital Ocean VPS. With this referral link you'll get $100 credit for 60 days.
This is a one liner for OpenSSL to generate a self signed certificate and private key.
openssl req -nodes -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 356
This is the output. Fill it in as required:
Generating a 2048 bit RSA private key ......................+++ ....................................+++ writing new private key to 'key.pem' ----- 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) [AU]:NL State or Province Name (full name) [Some-State]:Zuid Holland Locality Name (eg, city) :Rotterdam Organization Name (eg, company) [Internet Widgits Pty Ltd]:Sparkling Network Organizational Unit Name (eg, section) :QA Common Name (e.g. server FQDN or YOUR name) :example.sparklingnetwork.nl Email Address :
If you want a password on the private key, remove the