... int openssl_seal ( string data, string sealed_data, array env_keys, array pub_key_ids) . ... data is assumed to contain the data to be sealed // fetch public keys for our recipients, and ready them $fp = fopen( /src/openssl-0.9.6/demos/maurice/ cert .pem , r ); $ cert = fread($fp, 8192); fclose($fp); $ pk1 = openssl_get_publickey($ cert ); // Repeat for second recipient $fp = fopen( /src/openssl-0.9.6/demos/sign/ cert .pem , r ); $ cert = fread($fp, 8192); fclose($fp); $ ...