SharingSecuritySystem (OMERO API)

java.lang.Object
- ome.security.sharing.SharingSecuritySystem

All Implemented Interfaces:

SecuritySystem
```
public class SharingSecuritySystem
extends Object
implements SecuritySystem
```
central security interface. All queries and actions that deal with a secure context should pass through an implementation of this interface.

Since:

3.0-M3

Author:

Josh Moore, josh.moore at gmx.de

See Also:

Token, Details, Permissions, ACLEventListener

Constructor Summary

Constructors
Constructor and Description

SharingSecuritySystem(BasicSecuritySystem delegate)

Constructors
Constructor and Description
`SharingSecuritySystem(BasicSecuritySystem delegate)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`Details`	`checkManagedDetails(IObject object, Details trustedDetails)` checks that a non-privileged user has not attempted to edit the entity's `security details`.
`void`	`checkRestriction(String name, IObject obj)` Checks whether or not a `Policy` instance of matching name has been registered, considers itself active, and considers the passed context object to be restricted.
`void`	`disable(String... ids)` disables components of the backend for the current Thread.
`<T extends IObject> T`	`doAction(SecureAction action, T... objs)`
`void`	`enable(String... ids)` enables components of the backend for the current Thread.
`Long`	`getEffectiveUID()` Returns UID based on whether a share is active, etc.
`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.
`Roles`	`getSecurityRoles()`
`boolean`	`hasPrivilegedToken(IObject obj)` checks that the `IObject` argument has been granted a `Token` by the `SecuritySystem`.
`void`	`invalidateEventContext()` Clears the content of the `EventContext`so 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`	`isEmptyEventContext()`
`boolean`	`isGraphCritical(Details details)` Determines if the current security context has the possibility of corrupting consistent graphs.
`boolean`	`isReady()` checks if this `SecuritySystem` instance is in a valid state.
`boolean`	`isSystemType(Class<? extends IObject> klass)` checks if instances of the given type are "System-Types".
`void`	`loadEventContext(boolean isReadOnly)` Prepares the current `EventContext` instance with the current `Principal`.
`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`	`runAsAdmin(AdminAction action)` Calls `SecuritySystem.runAsAdmin(ExperimenterGroup, AdminAction)` with a null group.
`void`	`runAsAdmin(ExperimenterGroup group, AdminAction action)` Allows actions to be performed with the `EventContext.isCurrentUserAdmin()` flag enabled but without changing the value of `EventContext.getCurrentUserId()`, so that ownerships are properly handled.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SharingSecuritySystem
```
public SharingSecuritySystem(BasicSecuritySystem delegate)
```
- Method Detail
  - 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.
  - 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
  - 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.
  - doAction
```
public <T extends IObject> T doAction(SecureAction action,
                                      T... objs)
```
    Specified by:
    
    doAction in interface SecuritySystem
  - 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.
  - 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:
    
    the event context
  - 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
    
    Parameters:
    
    refresh - if the event context should first be reloaded
    
    Returns:
    
    the event context
    
    See Also:
    
    Trac ticket #4011
  - getEffectiveUID
```
public Long getEffectiveUID()
```
    Description copied from interface: SecuritySystem
    Returns UID based on whether a share is active, etc. This is the UID value that should be used for writing data. The return value may be null if the user is currently querying across multiple contents. In this case another method for choosing the UID must be chosen, for example by taking the UID of another element under consideration. For example,
```
 Annotation toSave = ...;
 if (toSave.getDetails().getOwner() == null) // No owner need to find one.
 {
     Long uid = sec.getEffectiveUID();
     if (uid != null)
     {
         toSave.getDetails().setOwner(new Experimenter(uid, false));
     }
     else
     {
         toSave.getDetails().setOwner(
            image.getDetails().getOwner()); // may be null.
     }
 }
 image.linkAnnotation(toSave);
 etc.
 
```
    Specified by:
    
    getEffectiveUID in interface SecuritySystem
    
    Returns:
    
    the effective user ID
  - getSecurityRoles
```
public Roles getSecurityRoles()
```
    Specified by:
    
    getSecurityRoles in interface SecuritySystem
  - hasPrivilegedToken
```
public boolean hasPrivilegedToken(IObject obj)
```
    Description copied from interface: SecuritySystem
    
    checks that the IObject argument has been granted a Token by the SecuritySystem.
    
    Specified by:
    
    hasPrivilegedToken in interface SecuritySystem
  - checkRestriction
```
public void checkRestriction(String name,
                             IObject obj)
```
    Description copied from interface: SecuritySystem
    
    Checks whether or not a 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.
  - 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[])
  - isEmptyEventContext
```
public boolean isEmptyEventContext()
```
  - isReady
```
public boolean isReady()
```
    Description copied from interface: SecuritySystem
    
    checks if this SecuritySystem instance is in a valid state. This includes that a user is properly logged in and that a connection is available to all necessary resources, e.g. database handle and mapping session. Not all methods require that the instance is ready.
    
    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)
```
    Description copied from interface: SecuritySystem
    
    checks if instances of the given type are "System-Types". Security logic for all system types is significantly different. In general, system types cannot be created, updated, or deleted by regular users, and are visible to all 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.
  - 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
  - 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 outermost 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) 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
    
    Parameters:
    
    principal - the new current principal
  - 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.
  - 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.
  - runAsAdmin
```
public void runAsAdmin(ExperimenterGroup group,
                       AdminAction action)
```
    Description copied from interface: SecuritySystem
    
    Allows actions to be performed with the EventContext.isCurrentUserAdmin() flag enabled but without changing the value of EventContext.getCurrentUserId(), so that ownerships are properly handled. The merging of detached entity graphs should be disabled for the extent of the execution. Due to the addition of the group permission system, we also permit setting the group on the call so that the administrator can work within all groups. A value of null will not change the current group. Note: the IUpdate save methods should not be used, since they also accept detached entities, which could pose security risks. Instead load an entity from the database via IQuery, make changes, and save the changes with IUpdate.
    
    Specified by:
    
    runAsAdmin in interface SecuritySystem
    
    Parameters:
    
    group - the group to run the action as
    
    action - the action to run
  - runAsAdmin
```
public void runAsAdmin(AdminAction action)
```
    Description copied from interface: SecuritySystem
    
    Calls SecuritySystem.runAsAdmin(ExperimenterGroup, AdminAction) with a null group.
    
    Specified by:
    
    runAsAdmin in interface SecuritySystem
    
    Parameters:
    
    action - the action to run
  - 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
    
    Parameters:
    
    details - the details
    
    Returns:
    
    if the graph is critical
    
    See Also:
    1769,
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OmeroJava API

Version: 5.3.3-ice35-b63

Class SharingSecuritySystem

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

SharingSecuritySystem

Method Detail

checkManagedDetails

invalidateEventContext

disable

doAction

enable

getEventContext

getEventContext

getEffectiveUID

getSecurityRoles

hasPrivilegedToken

checkRestriction

isDisabled

isEmptyEventContext

isReady

isSystemType

loadEventContext

login

logout

newTransientDetails

runAsAdmin

runAsAdmin

isGraphCritical