Protocol:
=Unlock keyring daemon=
0_Unlock|<masterkey>

==Reply==
201_Created
400_Bad_Request 
403_Forbidden
500_Internal_Server_Error
503_Service_Unavailable

=Encrypt password=
10_Encrypt|<appname>|<username>|<password>

==Reply==
201_Created
400_Bad_Request 
500_Internal_Server_Error
503_Service_Unavailable

=Decrypt password=
20_Decrypt|<appname>|<username>

==Reply==
200_OK |<password>
400_Bad_Request 
500_Internal_Server_Error
503_Service_Unavailable

=Check if password exists=
30_Check|<appname>|<username>

==Reply==
201_Created
400_Bad_Request 
404_Not_Found
500_Internal_Server_Error
503_Service_Unavailable