Package org.dspace.authenticate

Class PasswordAuthentication

java.lang.Object

org.dspace.authenticate.PasswordAuthentication

All Implemented Interfaces:

AuthenticationMethod

public class PasswordAuthentication
extends Object
implements AuthenticationMethod

A stackable authentication method based on the DSpace internal "EPerson" database. See the AuthenticationMethod interface for more details.

The username is the E-Person's email address, and and the password (given to the authenticate() method) must match the EPerson password.

This is the default method for a new DSpace configuration. If you are implementing a new "explicit" authentication method, use this class as a model.

You can use this (or another explicit) method in the stack to implement HTTP Basic Authentication for servlets, by passing the Basic Auth username and password to the AuthenticationManager.

Author:

Larry Stone

Field Summary

Fields inherited from interface org.dspace.authenticate.AuthenticationMethod

BAD_ARGS, BAD_CREDENTIALS, CERT_REQUIRED, NO_SUCH_USER, SUCCESS

Constructor Summary

Constructors

Constructor	Description
PasswordAuthentication()

Method Summary

Modifier and Type	Method	Description
boolean	allowSetPassword(Context context, javax.servlet.http.HttpServletRequest request, String username)	We always allow the user to change their password.
int	authenticate(Context context, String username, String password, String realm, javax.servlet.http.HttpServletRequest request)	Check credentials: username must match the email address of an EPerson record, and that EPerson must be allowed to login.
boolean	canChangePassword(Context context, EPerson ePerson, String currentPassword)	Check if the given current password is valid to change the password of the given ePerson
boolean	canSelfRegister(Context context, javax.servlet.http.HttpServletRequest request, String email)	Look to see if this email address is allowed to register.
String	getName()	Returns a short name that uniquely identifies this authentication method
List<Group>	getSpecialGroups(Context context, javax.servlet.http.HttpServletRequest request)	Add authenticated users to the group defined in authentication-password.cfg by the login.specialgroup key.
void	initEPerson(Context context, javax.servlet.http.HttpServletRequest request, EPerson eperson)	Nothing extra to initialize.
boolean	isImplicit()	This is an explicit method, since it needs username and password from some source.
boolean	isUsed(Context context, javax.servlet.http.HttpServletRequest request)	Get whether the authentication method is being used.
String	loginPageURL(Context context, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)	Returns URL of password-login servlet.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.dspace.authenticate.AuthenticationMethod

areSpecialGroupsApplicable

Constructor Detail

PasswordAuthentication

public PasswordAuthentication()

Method Detail

canSelfRegister

public boolean canSelfRegister(Context context,
                               javax.servlet.http.HttpServletRequest request,
                               String email)
                        throws SQLException

Look to see if this email address is allowed to register.

The configuration key domain.valid is examined in authentication-password.cfg to see what domains are valid.

Example - aber.ac.uk domain : @aber.ac.uk Example - MIT domain and all .ac.uk domains: @mit.edu, .ac.uk

Specified by:

canSelfRegister in interface AuthenticationMethod

Parameters:

email - email

context - DSpace context

request - HTTP request, in case it's needed. May be null.

Returns:

true if new ePerson should be created.

Throws:

SQLException - if database error

initEPerson

public void initEPerson(Context context,
                        javax.servlet.http.HttpServletRequest request,
                        EPerson eperson)
                 throws SQLException

Nothing extra to initialize.

Specified by:

initEPerson in interface AuthenticationMethod

Parameters:

context - DSpace context

request - HTTP request, in case it's needed. May be null.

eperson - newly created EPerson record - email + information from the registration form will have been filled out.

Throws:

SQLException - if database error

allowSetPassword

public boolean allowSetPassword(Context context,
                                javax.servlet.http.HttpServletRequest request,
                                String username)
                         throws SQLException

We always allow the user to change their password.

Specified by:

allowSetPassword in interface AuthenticationMethod

Parameters:

context - DSpace context

request - HTTP request, in case it's needed. May be null.

username - Username, if available. May be null.

Returns:

true if this method allows user to change ePerson password.

Throws:

SQLException - if database error

isImplicit

public boolean isImplicit()

This is an explicit method, since it needs username and password from some source.

Specified by:

isImplicit in interface AuthenticationMethod

Returns:

false

getSpecialGroups

public List<Group> getSpecialGroups(Context context,
                                    javax.servlet.http.HttpServletRequest request)

Add authenticated users to the group defined in authentication-password.cfg by the login.specialgroup key.

Specified by:

getSpecialGroups in interface AuthenticationMethod

Parameters:

context - A valid DSpace context.

request - The request that started this operation, or null if not applicable.

Returns:

array of EPerson-group IDs, possibly 0-length, but never null.

authenticate

public int authenticate(Context context,
                        String username,
                        String password,
                        String realm,
                        javax.servlet.http.HttpServletRequest request)
                 throws SQLException

Check credentials: username must match the email address of an EPerson record, and that EPerson must be allowed to login. Password must match its password. Also checks for EPerson that is only allowed to login via an implicit method and returns CERT_REQUIRED if that is the case.

Specified by:

authenticate in interface AuthenticationMethod

Parameters:

context - DSpace context, will be modified (EPerson set) upon success.

username - Username (or email address) when method is explicit. Use null for implicit method.

password - Password for explicit auth, or null for implicit method.

realm - Realm is an extra parameter used by some authentication methods, leave null if not applicable.

request - The HTTP request that started this operation, or null if not applicable.

Returns:

One of: SUCCESS, BAD_CREDENTIALS, CERT_REQUIRED, NO_SUCH_USER, BAD_ARGS

Meaning:
SUCCESS - authenticated OK.
BAD_CREDENTIALS - user exists, but password doesn't match
CERT_REQUIRED - not allowed to login this way without X.509 cert.
NO_SUCH_USER - no EPerson with matching email address.
BAD_ARGS - missing username, or user matched but cannot login.

Throws:

SQLException - if database error

loginPageURL

public String loginPageURL(Context context,
                           javax.servlet.http.HttpServletRequest request,
                           javax.servlet.http.HttpServletResponse response)

Returns URL of password-login servlet.

Specified by:

loginPageURL in interface AuthenticationMethod

Parameters:

context - DSpace context, will be modified (EPerson set) upon success.

request - The HTTP request that started this operation, or null if not applicable.

response - The HTTP response from the servlet method.

Returns:

fully-qualified URL

getName

public String getName()

Description copied from interface: AuthenticationMethod

Returns a short name that uniquely identifies this authentication method

Specified by:

getName in interface AuthenticationMethod

Returns:

The authentication method name

isUsed

public boolean isUsed(Context context,
                      javax.servlet.http.HttpServletRequest request)

Description copied from interface: AuthenticationMethod

Get whether the authentication method is being used.

Specified by:

isUsed in interface AuthenticationMethod

Parameters:

context - The DSpace context

request - The current request

Returns:

whether the authentication method is being used.

canChangePassword

public boolean canChangePassword(Context context,
                                 EPerson ePerson,
                                 String currentPassword)

Description copied from interface: AuthenticationMethod

Check if the given current password is valid to change the password of the given ePerson

Specified by:

canChangePassword in interface AuthenticationMethod

Parameters:

context - The DSpace context

ePerson - the ePerson related to the password change

currentPassword - The current password to check

Returns:

true if the provided password matches with current password