agentland.util
Class UserInfoAgent
java.lang.Object
|
+--java.rmi.server.RemoteObject
|
+--java.rmi.server.RemoteServer
|
+--java.rmi.server.UnicastRemoteObject
|
+--metaglue.AgentAgent
|
+--agentland.util.GoodAgent
|
+--agentland.util.UserInfoAgent
- public class UserInfoAgent
- extends GoodAgent
- implements UserInfo
The UserInfo agent is used to get info about the user in a
more-or-less secure fashion. Since this information can include
passwords, email locations, chat program user ids, and other items
that the user may want kept secret, we will avoid passing this
information in the clear as much as possible.
The data is stored, encrypted, in a JDBC database. The agent uses
the blowfish algorithm to encrypt the data using a pass phrase
found in the .metaglue-userinfo file. The database can also be set
up to only give read access to the user, but most databases don't
have really fantastic security.
Note that .metaglue-userinfo should be stored with mode
600, so that no one other than the given user id can read it. If
you don't do this, your data is not secure!
There can only be one instance of UserInfoAgent for each user.
Therefore, UserInfoAgent will kill itself off if it's running
without a designation, or if the designation does not match the
current user id.
UserInfoAgent is probably vulnerable to spoofing attacks; an agent
could be written to hunt through the catalog for any UserInfoAgents
out there and ask them for information.
Currently, this agent must run on a Unix box, since the user.home
system property is not set correctly on Windows NT.
- See Also:
- Serialized Form
| Methods inherited from class agentland.util.GoodAgent |
addSpy,
addSpy,
alert,
alertString,
beep,
error,
getAlert,
getHistory,
getHistoryElement,
getPersistentMap,
log,
notify,
removeSpy,
removeSpy,
resetHistory,
safeRely,
safeRely,
safeRely,
setNiceLogName,
tell |
| Methods inherited from class metaglue.AgentAgent |
addMonitor,
alive,
defrost,
defrostAll,
defrostBoolean,
defrostInt,
defrostString,
fixAttribute,
fixAttribute,
freeze,
freeze,
freeze,
freezeAll,
freezeVar,
getAgentID,
getAttribute,
getCatalog,
getCatalogID,
getDesignation,
getFrozenVariables,
getLogLevel,
getMetaglueAgent,
getMetaglueAgentID,
getOccupation,
getSociety,
log,
log,
obtainMetaglueAgent,
obtainMetaglueAgent,
obtainMetaglueAgentByName,
reliesOn,
reliesOn,
reliesOn,
reliesOnSynch,
removeFrozen,
replaceExceptionHandler,
setFreezeName,
setLogLevel,
setLogName,
shutdown,
startAgent,
startAgentOn,
startAgentOn,
startup,
status,
tiedTo,
tiedTo,
tiedTo,
tiedTo,
tieToDesignation,
whereAreYou |
UserInfoAgent
public UserInfoAgent()
throws RemoteException
getProperties
public Properties getProperties()
- Gets all the properties in the database, and returns them as a
Properties object.
- Overrides:
- getProperties in class AgentAgent
- Returns:
- a value of type 'Properties'. The properties object.
getProperty
public String getProperty(String prop)
throws RemoteException
- Gets a property value.
- Specified by:
- getProperty in interface UserInfo
- Parameters:
prop - a value of type 'String'. This is the key used to
look up the value in the database.- Returns:
- a value of type 'String'. This is the unencrypted
result.
- Throws:
- RemoteException - if an error occurs
setProperty
public Object setProperty(String key,
String val)
throws RemoteException
- Sets a property in the database, with encryption.
- Specified by:
- setProperty in interface UserInfo
- Parameters:
key - a value of type 'String'. The name of the property.val - a value of type 'String'. The value to assign to the property.- Returns:
- a value of type 'Object' This is the old value of the
property, if any (returns null if no previous value).
- Throws:
- RemoteException - if an error occurs
main
public static void main(String[] args)
- Creates an initial .metaglue-userinfo file with a random 40
character key. The ensuing file should be protected with a
"chmod 600" command so only the user can read it.
- Parameters:
args[] - a value of type 'String'. Currently no arguments
are processed.