OpenSSL – Supports the HTTPS protocol. Required by the NGINX SSL module and others.

Run the following commands to install openssl

cd /tmp/
wget http://www.openssl.org/source/openssl-1.0.2o.tar.gz
tar -zxf openssl-1.0.2o.tar.gz
cd openssl-1.0.2o
./Configure linux-x86_64 --prefix=/usr 
make
make install

You can verify the installation by issuing the following command.

openssl -version