cat /tmp/foo | openssl smime -sign -inkey ./demoCA/private/cakey.pem -signer ./demoCA/cacert.pem -certfile ./newreq.pem -noattr -nodetach -outform DER > apple-app-site-association
cat /tmp/foo | openssl smime -sign -inkey ./demoCA/private/cakey.pem -signer ./demoCA/cacert.pem -certfile ./newreq.pem -noattr -nodetach -outform DER > apple-app-site-association