Create a certificate with any expiry date

Create a certificate with any expiry date

1. Create CA certificate and private key key

a. openssl genrsa -out ca.key 2048

b. openssl req -new -x509 -key ca.key -out ca.crt

2. Generate CSR

openssl req -out server.csr -new -newkey rsa:2048 -nodes -keyout  server.key

3. Sign the CSR and create certificate

openssl ca  -policy policy_anything -out clientcert.pem -startdate 190221080000Z -enddate 190221090000Z -cert ca.crt -keyfile ca.key -infiles server_anil.csr

These commands have to be executed for the above command to succeed:

mkdir -p demoCA/newcerts
touch demoCA/index.txt.attr
touch demoCA/index.txt
echo '01' > demoCA/serial

4. Reference 

How to setup your own CA with OpenSSL -  https://gist.github.com/Soarez/9688998