VIMP requires its own certificate as Service Provider (SP). You can either store your own certificate in the folder plugins/stSAMLPlugin/certs (vimp.crt and vimp.pem) or you create a new one with the following commands:
cd certs/ && \ openssl req -newkey rsa:3072 -new -x509 -days 3652 -nodes -out vimp.crt -keyout vimp.pem
Please never give the private key (vimp.pem) to third parties!
