Server code for using SSL and server-side authentication

grpc_ssl_server.py

# read in key and certificate
with open('server.key', 'rb') as f:
    private_key = f.read()
with open('server.crt', 'rb') as f:
    certificate_chain = f.read()

# create server credentials
server_credentials = grpc.ssl_server_credentials(
  ((private_key, certificate_chain,),))

# create server
server = grpc.server(futures.ThreadPoolExecutor(max_workers=1))
service_pb2_grpc.add_ServerServicer_to_server(ServerServicer(), server)

# add secure port using crendentials
server.add_secure_port('[::]:'+port, server_credentials)

Note line 4 is missing closing the string literal for the 'open' mode; it should be:

with open('server.crt', 'rb') as f:

Thanks. Good catch - updated.