ome.security.basic

Class BasicSecuritySystem

java.lang.Object

ome.security.basic.BasicSecuritySystem

All Implemented Interfaces:

EventListener, SecuritySystem, org.springframework.context.ApplicationContextAware, org.springframework.context.ApplicationListener<EventLogMessage>

public class BasicSecuritySystem
extends Object
implements SecuritySystem, org.springframework.context.ApplicationContextAware, org.springframework.context.ApplicationListener<EventLogMessage>

simplest implementation of SecuritySystem. Uses an ctor-injected EventContext and the ThreadLocal-based CurrentDetails to provide the security infrastructure.

Since:

3.0-M3

Version:

$Revision: 1581 $, $Date: 2007-06-02 12:31:30 +0200 (Sat, 02 Jun 2007) $

Author:

Josh Moore, josh.moore at gmx.de

See Also:

Token, SecuritySystem, Details, Permissions

Field Summary

Fields

Modifier and Type	Field and Description
protected CurrentDetails	cd
protected OmeroContext	ctx
protected SecurityFilter	filter
protected OmeroInterceptor	interceptor
protected PolicyService	policyService
protected Roles	roles
protected SessionManager	sessionManager
protected ServiceFactory	sf
protected ShareStore	store
protected SystemTypes	sysTypes
protected TokenHolder	tokenHolder

Constructor Summary

Constructors

Constructor and Description
BasicSecuritySystem(OmeroInterceptor interceptor, SystemTypes sysTypes, CurrentDetails cd, SessionManager sessionManager, Roles roles, ServiceFactory sf, TokenHolder tokenHolder, SecurityFilter filter, PolicyService policyService) Main public constructor for this SecuritySystem implementation.

Method Summary

Methods

Modifier and Type	Method and Description
void	addLog(String action, Class klass, Long id)
Details	checkManagedDetails(IObject object, Details trustedDetails) checks that a non-privileged user has not attempted to edit the entity's security details.
protected void	checkReady(String method) calls isReady() and if not throws an ApiUsageException.
void	checkRestriction(String name, IObject obj) Checks whether or not a ome.sercurity.Policy instance of matching name has been registered, considers itself active, and considers the passed context object to be restricted.
void	clearLogs()
void	copyToken(IObject source, IObject copy) See {@link TokenHolder#copyToken(IObject, IObject)
void	disable(String... ids) disables components of the backend for the current Thread.
void	disableReadFilter(Object session) disable this filer.
<T extends IObject> T	doAction(SecureAction action, T... objs) It would be better to catch the SecureAction#updateObject(IObject) method in a try/finally block, but since flush can be so poorly controlled that's not possible. instead, we use the one time token which is removed this Object is checked for privileges.
void	enable(String... ids) enables components of the backend for the current Thread.
void	enableReadFilter(Object session) enables the read filter such that graph queries will have non-visible entities silently removed from the return value.
Long	getEffectiveUID() Returns the Id of the currently logged in user.
EventContext	getEventContext() Calls SecuritySystem.getEventContext(boolean) with a false as "refresh".
EventContext	getEventContext(boolean refresh) If refresh is false, returns the current EventContext stored in the session.
List<EventLog>	getLogs()
Roles	getSecurityRoles()
boolean	hasPrivilegedToken(IObject obj) See {@link TokenHolder#hasPrivilegedToken(IObject)
void	invalidateEventContext() Clears the content of the EventContextso that the SecuritySystem will no longer return true for SecuritySystem.isReady().
boolean	isDisabled(String id) checks if the listed id is disabled for the current Thread.
boolean	isGraphCritical(Details details) Determines if the current security context has the possibility of corrupting consistent graphs.
boolean	isOwnerOrSupervisor(IObject iObject) tests whether or not the current user is either the owner of this entity, or the superivsor of this entity, for example as root or as group owner.
boolean	isReady() implements SecuritySystem.isReady().
boolean	isSystemType(Class<? extends IObject> klass) classes which cannot be created by regular users.
void	loadEventContext(boolean isReadOnly) Prepares the current EventContext instance with the current Principal.
void	loadEventContext(boolean isReadOnly, boolean isClose)
void	login(Principal principal) stores this Principal instance in the current thread context for authenticating and authorizing all actions.
int	logout() clears the top Principal instance from the current thread context.
Details	newTransientDetails(IObject object) creates a new secure details for transient entities.
void	onApplicationEvent(EventLogMessage elm) Handle an application event.
void	runAsAdmin(AdminAction action) Calls runAsAdmin(AdminAction) with a null-group id.
void	runAsAdmin(ExperimenterGroup group, AdminAction action) merge event is disabled for runAsAdmin(AdminAction) because passing detached (client-side) entities to this method is particularly dangerous.
static BasicSecuritySystem	selfConfigure(SessionManager sm, ServiceFactory sf, SessionCache cache) Simplified factory method which generates all the security primitives internally.
void	setApplicationContext(org.springframework.context.ApplicationContext arg0) Set the ApplicationContext that this object runs in.
void	updateReadFilter(org.hibernate.Session session)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

interceptor

protected final OmeroInterceptor interceptor

sysTypes

protected final SystemTypes sysTypes

cd

protected final CurrentDetails cd

tokenHolder

protected final TokenHolder tokenHolder

roles

protected final Roles roles

sessionManager

protected final SessionManager sessionManager

sf

protected final ServiceFactory sf

filter

protected final SecurityFilter filter

policyService

protected final PolicyService policyService

ctx

protected OmeroContext ctx

store

protected ShareStore store

Constructor Detail

BasicSecuritySystem

public BasicSecuritySystem(OmeroInterceptor interceptor,
                   SystemTypes sysTypes,
                   CurrentDetails cd,
                   SessionManager sessionManager,
                   Roles roles,
                   ServiceFactory sf,
                   TokenHolder tokenHolder,
                   SecurityFilter filter,
                   PolicyService policyService)

Main public constructor for this SecuritySystem implementation.

Method Detail

selfConfigure

public static BasicSecuritySystem selfConfigure(SessionManager sm,
                                ServiceFactory sf,
                                SessionCache cache)

Simplified factory method which generates all the security primitives internally. Primarily useful for generated testing instances.

setApplicationContext

public void setApplicationContext(org.springframework.context.ApplicationContext arg0)
                           throws org.springframework.beans.BeansException

Description copied from interface: org.springframework.context.ApplicationContextAware

Set the ApplicationContext that this object runs in. Normally this call will be used to initialize the object.

Invoked after population of normal bean properties but before an init callback such as InitializingBean.afterPropertiesSet() or a custom init-method. Invoked after ResourceLoaderAware.setResourceLoader(org.springframework.core.io.ResourceLoader), ApplicationEventPublisherAware.setApplicationEventPublisher(org.springframework.context.ApplicationEventPublisher) and MessageSourceAware, if applicable.

Specified by:

setApplicationContext in interface org.springframework.context.ApplicationContextAware

Parameters:

arg0 - the ApplicationContext object to be used by this object

Throws:

org.springframework.context.ApplicationContextException - in case of context initialization errors

org.springframework.beans.BeansException - if thrown by application context methods

See Also:

BeanInitializationException

login

public void login(Principal principal)

Description copied from interface: SecuritySystem

stores this Principal instance in the current thread context for authenticating and authorizing all actions. This method does not make any queries and is only a conduit for login information from the outer-most levels. Session bean implementations and other in-JVM clients can fill the Principal. Note, however, a call must first be made to SecuritySystem.loadEventContext(boolean) or #setEventContext(EventContext) for some calls to be made to the SecuritySystem. In general, this means that execution must pass through the EventHandler

Specified by:

login in interface SecuritySystem

logout

public int logout()

Description copied from interface: SecuritySystem

clears the top Principal instance from the current thread context.

Specified by:

logout in interface SecuritySystem

Returns:

the number of remaining instances.

isReady

public boolean isReady()

implements SecuritySystem.isReady(). Simply checks for null values in all the relevant fields of CurrentDetails

Specified by:

isReady in interface SecuritySystem

Returns:

true if all methods on this interface are ready to be called.

isSystemType

public boolean isSystemType(Class<? extends IObject> klass)

classes which cannot be created by regular users.

Specified by:

isSystemType in interface SecuritySystem

Parameters:

klass - A class which extends from IObject

Returns:

true if instances of the class argument can be considered system types.

See Also:

ticket156

isOwnerOrSupervisor

public boolean isOwnerOrSupervisor(IObject iObject)

tests whether or not the current user is either the owner of this entity, or the superivsor of this entity, for example as root or as group owner.

Parameters:

iObject - Non-null managed entity.

Returns:

true if the current user is owner or supervisor of this entity

enableReadFilter

public void enableReadFilter(Object session)

enables the read filter such that graph queries will have non-visible entities silently removed from the return value. This filter does not apply to single value loads from the database. See #allowLoad(Class, Details) for more. Note: this filter must be disabled on logout, otherwise the necessary parameters (current user, current group, etc.) for building the filters will not be available. Similarly, while enabling this filter, no calls should be made on the given session object.

Parameters:

session - a generic session object which can be used to enable this filter. Each SecuritySystem implementation will require a specific session type.

See Also:

EventHandler.invoke(org.aopalliance.intercept.MethodInvocation)

updateReadFilter

public void updateReadFilter(org.hibernate.Session session)

disableReadFilter

public void disableReadFilter(Object session)

disable this filer. All future queries will have no security context associated with them and all items will be visible.

Parameters:

session - a generic session object which can be used to disable this filter. Each SecuritySystem implementation will require a specifc session type.

See Also:

EventHandler.invoke(org.aopalliance.intercept.MethodInvocation)

disable

public void disable(String... ids)

Description copied from interface: SecuritySystem

disables components of the backend for the current Thread. Further checks to SecuritySystem.isDisabled(String) will return false. It is the responsibility of various security system components to then throw exceptions.

Specified by:

disable in interface SecuritySystem

Parameters:

ids - Non-null, non-empty array of String ids to disable.

enable

public void enable(String... ids)

Description copied from interface: SecuritySystem

enables components of the backend for the current Thread. Further checks to SecuritySystem.isDisabled(String) will return true.

Specified by:

enable in interface SecuritySystem

Parameters:

ids - possibly null array of String ids. A null array specifies that all subsystems are to be enabled. Otherwise, only those subsystems specified by the ids.

isDisabled

public boolean isDisabled(String id)

Description copied from interface: SecuritySystem

checks if the listed id is disabled for the current Thread.

Specified by:

isDisabled in interface SecuritySystem

Parameters:

id - non-null String representing a backend subsystem.

Returns:

true if the backend subsystem has been previously disabled by calls to SecuritySystem.disable(String[])

newTransientDetails

public Details newTransientDetails(IObject object)
                            throws ApiUsageException,
                                   SecurityViolation

Description copied from interface: SecuritySystem

creates a new secure details for transient entities. Non-privileged users can only edit the Permissions field. Privileged users can use the Details object as a single-step chmod and chgrp. newTransientDetails always returns a non-null Details that is not equivalent (==) to the Details argument. This method can be used from anywhere in the codebase to obtain a valid Details, but passing in an IObject instance with a null Details. However, if the Details is non-null, there is the possibility that this method will throw an exception.

Specified by:

newTransientDetails in interface SecuritySystem

Throws:

ApiUsageException - if SecuritySystem is not ready

SecurityViolation - if Details instance contains illegal values.

checkManagedDetails

public Details checkManagedDetails(IObject object,
                          Details trustedDetails)
                            throws ApiUsageException,
                                   SecurityViolation

Description copied from interface: SecuritySystem

checks that a non-privileged user has not attempted to edit the entity's security details. Privileged users can set fields on Details as a single-step chmod and chgrp. managedDetails may create a new Details instance and return that if needed. If the returned Details is not equivalent (==) to the argument Details, then values have been changed.

Specified by:

checkManagedDetails in interface SecuritySystem

Parameters:

object - non-null IObject instance. Details for that instance can be null.

trustedDetails - possibly null Details instance. These Details are trusted in the sense that they have already once passed through the SecuritySystem.

Throws:

ApiUsageException - if SecuritySystem is not ready

SecurityViolation - if Details instance contains illegal values.

isGraphCritical

public boolean isGraphCritical(Details details)

Description copied from interface: SecuritySystem

Determines if the current security context has the possibility of corrupting consistent graphs. Consistent graphs are enforced by the security context to make sure that all READ actions work smoothly. If an administrator or PI is logged into a private group, or otherwise may create an object linked to an object with lower READ rights, then corruption could occur. Starting with 4.4.2, a trusted details object should be passed in order to handle the situation where the current group id is -1. Possibles cases that can occur:

  The current group is non-negative, then use the previous logic;
  else the current group is negative,
     and the object is in a non-"user" group: USE THAT GROUP;
     else the object is in the "user" group: UNCLEAR
     (for the moment we're throwing an exception)
 

If no Details instance is passed or a Details without a ExperimenterGroup value, then throw as well.

Specified by:

isGraphCritical in interface SecuritySystem

Returns:

See Also:

1769,

loadEventContext

public void loadEventContext(boolean isReadOnly)

Description copied from interface: SecuritySystem

Prepares the current EventContext instance with the current Principal. An exception is thrown if there is none.

Specified by:

loadEventContext in interface SecuritySystem

loadEventContext

public void loadEventContext(boolean isReadOnly,
                    boolean isClose)

addLog

public void addLog(String action,
          Class klass,
          Long id)

getLogs

public List<EventLog> getLogs()

clearLogs

public void clearLogs()

invalidateEventContext

public void invalidateEventContext()

Description copied from interface: SecuritySystem

Clears the content of the EventContextso that the SecuritySystem will no longer return true for SecuritySystem.isReady(). The Principal set during SecuritySystem.login(Principal) is retained.

Specified by:

invalidateEventContext in interface SecuritySystem

doAction

public <T extends IObject> T doAction(SecureAction action,
                             T... objs)

It would be better to catch the SecureAction#updateObject(IObject) method in a try/finally block, but since flush can be so poorly controlled that's not possible. instead, we use the one time token which is removed this Object is checked for privileges.

Specified by:

doAction in interface SecuritySystem

Parameters:

obj - A managed (non-detached) entity. Not null.

action - A code-block that will be given the entity argument with a hasPrivilegedToken(IObject) privileged token}.

runAsAdmin

public void runAsAdmin(AdminAction action)

Calls runAsAdmin(AdminAction) with a null-group id.

Specified by:

runAsAdmin in interface SecuritySystem

runAsAdmin

public void runAsAdmin(ExperimenterGroup group,
              AdminAction action)

merge event is disabled for runAsAdmin(AdminAction) because passing detached (client-side) entities to this method is particularly dangerous.

Specified by:

runAsAdmin in interface SecuritySystem

copyToken

public void copyToken(IObject source,
             IObject copy)

See {@link TokenHolder#copyToken(IObject, IObject)

hasPrivilegedToken

public boolean hasPrivilegedToken(IObject obj)

See {@link TokenHolder#hasPrivilegedToken(IObject)

Specified by:

hasPrivilegedToken in interface SecuritySystem

checkRestriction

public void checkRestriction(String name,
                    IObject obj)

Description copied from interface: SecuritySystem

Checks whether or not a ome.sercurity.Policy instance of matching name has been registered, considers itself active, and considers the passed context object to be restricted.

Specified by:

checkRestriction in interface SecuritySystem

Parameters:

name - A non-null unique name for a class of policies.

obj - An instance which is to be checked against matching policies.

getSecurityRoles

public Roles getSecurityRoles()

Specified by:

getSecurityRoles in interface SecuritySystem

getEventContext

public EventContext getEventContext(boolean refresh)

Description copied from interface: SecuritySystem

If refresh is false, returns the current EventContext stored in the session. Otherwise, reloads the context to have the most up-to-date information.

Specified by:

getEventContext in interface SecuritySystem

Returns:

See Also:

ticket:4011

getEventContext

public EventContext getEventContext()

Description copied from interface: SecuritySystem

Calls SecuritySystem.getEventContext(boolean) with a false as "refresh". This is the previous, safer logic of the method since consumers are not expecting a long-method run.

Specified by:

getEventContext in interface SecuritySystem

Returns:

getEffectiveUID

public Long getEffectiveUID()

Returns the Id of the currently logged in user. Returns owner of the share while in share

Specified by:

getEffectiveUID in interface SecuritySystem

Returns:

See above.

checkReady

protected void checkReady(String method)

calls isReady() and if not throws an ApiUsageException. The SecuritySystem must be in a valid state to perform several functions.

onApplicationEvent

public void onApplicationEvent(EventLogMessage elm)

Description copied from interface: org.springframework.context.ApplicationListener

Handle an application event.

Specified by:

onApplicationEvent in interface org.springframework.context.ApplicationListener<EventLogMessage>

Parameters:

elm - the event to respond to