How to Create Self-Signed Certificates using OpenSSL

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The OpenSSL toolkit is required to generate a self-signed certificate.

# yum install openssl


Creating Self-Signed SSL Certificate 

# mkdir /etc/pki/tls/myssl

# cd /etc/pki/tls/myssl

# openssl req -newkey rsa:4096 -x509 -sha256 -days 3650 -nodes -out new_example.crt -keyout new_example.key

Can't load /root/.rnd into RNG

140468795707840:error:2406F079:random number generator:RAND_load_file:Cannot open file:../crypto/rand/randfile.c:88:Filename=/root/.rnd

Generating a RSA private key

................................................................................++++

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writing new private key to 'new_example.key'

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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.

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Enter the information requested and press Enter.


Country Name (2 letter code) [AU]:IN

State or Province Name (full name) [Some-State]:Delhi

Locality Name (eg, city) []:Delhi

Organization Name (eg, company) [Internet Widgits Pty Ltd]:example.com

Organizational Unit Name (eg, section) []:IT

Common Name (e.g. server FQDN or YOUR name) []:*.example.com

Email Address []:root@example.com


The certificate and private key will be created

# ls

new_example.crt  new_example.key



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