org.opencms.security

Class CmsPersistentLoginTokenHandler

java.lang.Object

org.opencms.security.CmsPersistentLoginTokenHandler

public class CmsPersistentLoginTokenHandler
extends java.lang.Object

Creates and validates persisten login tokens for users.

When a token is created for a user, a special additional info item is stored on the user, such that the token uniquely identifies that info item. The value of the info item is the expiration date of the token. A token is validated by looking up the additional info item for the user and checking whether the token is still valid according to the stored expiration date.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CmsPersistentLoginTokenHandler.Token Bean representing the data encoded in a login token (user name and key).

Field Summary

Fields

Modifier and Type	Field and Description
static long	DEFAULT_LIFETIME Default token lifetime.
static java.lang.String	KEY_PREFIX Prefix used for the keys for the additional infos this class creates.

Constructor Summary

Constructors

Constructor and Description
CmsPersistentLoginTokenHandler() Creates a new instance.

Method Summary

Modifier and Type	Method and Description
java.lang.String	createToken(CmsObject cms) Generates a new login token for a given user and registers the token in the user's additional info.
void	invalidateToken(CmsUser user, java.lang.String token) Invalidates all tokens for the given user.
void	removeExpiredTokens(CmsUser user, long now) Removes expired tokens from the user's additional infos.
static void	setAdminCms(CmsObject adminCms) Static method used to give this class access to an admin cms context.
void	setTokenLifetime(long duration) Sets the token lifetime.
CmsUser	validateToken(java.lang.String tokenString) Validates a token and returns the matching user for which the token is valid.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_LIFETIME

public static final long DEFAULT_LIFETIME

Default token lifetime.

See Also:

Constant Field Values

KEY_PREFIX

public static final java.lang.String KEY_PREFIX

Prefix used for the keys for the additional infos this class creates.

See Also:

Constant Field Values

Constructor Detail

CmsPersistentLoginTokenHandler

public CmsPersistentLoginTokenHandler()

Creates a new instance.

Method Detail

setAdminCms

public static void setAdminCms(CmsObject adminCms)

Static method used to give this class access to an admin cms context.

Parameters:

adminCms - the admin cms context to set

createToken

public java.lang.String createToken(CmsObject cms)
                             throws CmsException

Generates a new login token for a given user and registers the token in the user's additional info.

Parameters:

cms - the CMS context for which to create a new token

Returns:

the generated token

Throws:

CmsException - if something goes wrong

invalidateToken

public void invalidateToken(CmsUser user,
                            java.lang.String token)
                     throws CmsException

Invalidates all tokens for the given user.

Parameters:

user - the user

token - the token string

Throws:

CmsException - if something goes wrong

removeExpiredTokens

public void removeExpiredTokens(CmsUser user,
                                long now)

Removes expired tokens from the user's additional infos.

This method does not write the user back to the database.

Parameters:

user - the user for which to remove the additional infos

now - the current time

setTokenLifetime

public void setTokenLifetime(long duration)

Sets the token lifetime.

Parameters:

duration - the number of milliseconds for which the token should be valid

validateToken

public CmsUser validateToken(java.lang.String tokenString)

Validates a token and returns the matching user for which the token is valid.

Returns null if no user matching the token is found, or if the token for the user is expired

Parameters:

tokenString - the token for which to find the matching user

Returns:

the matching user for the token, or null if no matching user was found or the token is expired