Generating certs for testing PDF signing

Run the following as root:

openssl genrsa -out ca.key 2048
openssl req -new -key ca.key -out ca.csr
openssl x509 -req -days 365 -in ca.csr -signkey ca.key -out ca.crt
openssl pkcs12 -export -in ca.crt -inkey ca.key -name ca -passout pass:password -out ca.pfx