The transition from SHA-1 to SHA-2 is coming soon. On November 7th, 2014, Google Chrome will stop displaying the security indicators such as the green padlock and/or green address bar for any certificates using the now outdated SHA-1 algorithm.
To manually generate a CSR or Self-Signed SSL certificate follow these steps:
1. Generate a 4096 bit private key:
#openssl genrsa -out newkey.key 4096
2. Generate the csr file using the private key.
#openssl req -new -x509 -sha256 -key newkey.key -out new.csr -days 1095
That’s it! 
Hope this helps!