/**
* The contents of this file are subject to the license and copyright
* detailed in the LICENSE and NOTICE files at the root of the source
* tree and available online at
*
* http://www.dspace.org/license/
*/
package org.dspace.authenticate;
import java.sql.SQLException;
import java.util.Hashtable;
import java.util.HashSet;
import java.util.Set;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;
import org.dspace.authorize.AuthorizeException;
import org.dspace.core.ConfigurationManager;
import org.dspace.core.Context;
import org.dspace.core.LogManager;
import org.dspace.eperson.EPerson;
import org.dspace.eperson.Group;
/**
* This combined LDAP authentication method supersedes both the 'LDAPAuthentication'
* and the 'LDAPHierarchicalAuthentication' methods. It's capable of both:
* - authenticaton against a flat LDAP tree where all users are in the same unit
* (if search.user or search.password is not set)
* - authentication against structured hierarchical LDAP trees of users.
* An initial bind is required using a user name and password in order to
* search the tree and find the DN of the user. A second bind is then required to
* check the credentials of the user by binding directly to their DN.
*
* @author Stuart Lewis, Chris Yates, Alex Barbieri, Flavio Botelho, Reuben Pasquini, Samuel Ottenhoff, Ivan Masár
* @version $Revision$
*/
public class LDAPAuthentication
implements AuthenticationMethod {
/** log4j category */
private static Logger log = Logger.getLogger(LDAPAuthentication.class);
/**
* Let a real auth method return true if it wants.
*/
public boolean canSelfRegister(Context context,
HttpServletRequest request,
String username)
throws SQLException
{
// Looks to see if autoregister is set or not
return ConfigurationManager.getBooleanProperty("authentication-ldap", "autoregister");
}
/**
* Nothing here, initialization is done when auto-registering.
*/
public void initEPerson(Context context, HttpServletRequest request,
EPerson eperson)
throws SQLException
{
// XXX should we try to initialize netid based on email addr,
// XXX for eperson created by some other method??
}
/**
* Cannot change LDAP password through dspace, right?
*/
public boolean allowSetPassword(Context context,
HttpServletRequest request,
String username)
throws SQLException
{
// XXX is this right?
return false;
}
/*
* This is an explicit method.
*/
public boolean isImplicit()
{
return false;
}
/*
* Add authenticated users to the group defined in dspace.cfg by
* the login.specialgroup key.
*/
public int[] getSpecialGroups(Context context, HttpServletRequest request)
{
// Prevents anonymous users from being added to this group, and the second check
// ensures they are LDAP users
try
{
if (!context.getCurrentUser().getNetid().equals(""))
{
String groupName = ConfigurationManager.getProperty("authentication-ldap", "login.specialgroup");
if ((groupName != null) && (!groupName.trim().equals("")))
{
Group ldapGroup = Group.findByName(context, groupName);
if (ldapGroup == null)
{
// Oops - the group isn't there.
log.warn(LogManager.getHeader(context,
"ldap_specialgroup",
"Group defined in login.specialgroup does not exist"));
return new int[0];
} else
{
return new int[] { ldapGroup.getID() };
}
}
}
}
catch (Exception npe) {
// The user is not an LDAP user, so we don't need to worry about them
}
return new int[0];
}
/*
* Authenticate the given credentials.
* This is the heart of the authentication method: test the
* credentials for authenticity, and if accepted, attempt to match
* (or optionally, create) an EPerson
. If an EPerson
is found it is
* set in the Context
that was passed.
*
* @param context
* DSpace context, will be modified (ePerson set) upon success.
*
* @param username
* Username (or email address) when method is explicit. Use null for
* implicit method.
*
* @param password
* Password for explicit auth, or null for implicit method.
*
* @param realm
* Realm is an extra parameter used by some authentication methods, leave null if
* not applicable.
*
* @param request
* The HTTP request that started this operation, or null if not applicable.
*
* @return One of:
* SUCCESS, BAD_CREDENTIALS, CERT_REQUIRED, NO_SUCH_USER, BAD_ARGS
*
Meaning:
*
SUCCESS - authenticated OK.
*
BAD_CREDENTIALS - user exists, but credentials (e.g. passwd) don't match
*
CERT_REQUIRED - not allowed to login this way without X.509 cert.
*
NO_SUCH_USER - user not found using this method.
*
BAD_ARGS - user/pw not appropriate for this method
*/
public int authenticate(Context context,
String netid,
String password,
String realm,
HttpServletRequest request)
throws SQLException
{
log.info(LogManager.getHeader(context, "auth", "attempting trivial auth of user="+netid));
// Skip out when no netid or password is given.
if (netid == null || password == null)
{
return BAD_ARGS;
}
// Locate the eperson
EPerson eperson = null;
try
{
eperson = EPerson.findByNetid(context, netid.toLowerCase());
}
catch (SQLException e)
{
}
SpeakerToLDAP ldap = new SpeakerToLDAP(log);
// Get the DN of the user
boolean anonymousSearch = ConfigurationManager.getBooleanProperty("authentication-ldap", "search.anonymous");
String adminUser = ConfigurationManager.getProperty("authentication-ldap", "search.user");
String adminPassword = ConfigurationManager.getProperty("authentication-ldap", "search.password");
String objectContext = ConfigurationManager.getProperty("authentication-ldap", "object_context");
String idField = ConfigurationManager.getProperty("authentication-ldap", "id_field");
String dn = "";
// If adminUser is blank and anonymous search is not allowed, then we can't search so construct the DN instead of searching it
if ((StringUtils.isBlank(adminUser) || StringUtils.isBlank(adminPassword)) && !anonymousSearch)
{
dn = idField + "=" + netid + "," + objectContext;
}
else
{
dn = ldap.getDNOfUser(adminUser, adminPassword, context, netid);
}
// Check a DN was found
if ((dn == null) || (dn.trim().equals("")))
{
log.info(LogManager
.getHeader(context, "failed_login", "no DN found for user " + netid));
return BAD_CREDENTIALS;
}
// if they entered a netid that matches an eperson
if (eperson != null)
{
// e-mail address corresponds to active account
if (eperson.getRequireCertificate())
{
return CERT_REQUIRED;
}
else if (!eperson.canLogIn())
{
return BAD_ARGS;
}
if (ldap.ldapAuthenticate(dn, password, context))
{
context.setCurrentUser(eperson);
// assign user to groups based on ldap dn
assignGroups(dn, ldap.ldapGroup, context);
log.info(LogManager
.getHeader(context, "authenticate", "type=ldap"));
return SUCCESS;
}
else
{
return BAD_CREDENTIALS;
}
}
else
{
// the user does not already exist so try and authenticate them
// with ldap and create an eperson for them
if (ldap.ldapAuthenticate(dn, password, context))
{
// Register the new user automatically
log.info(LogManager.getHeader(context,
"autoregister", "netid=" + netid));
// If there is no email and the email domain is set, add it to the netid
String email = ldap.ldapEmail;
if ((StringUtils.isEmpty(email)) &&
(StringUtils.isNotEmpty(ConfigurationManager.getProperty("authentication-ldap", "netid_email_domain"))))
{
email = netid + ConfigurationManager.getProperty("authentication-ldap", "netid_email_domain");
}
else
{
email = netid;
}
if (StringUtils.isNotEmpty(email))
{
try
{
eperson = EPerson.findByEmail(context, email);
if (eperson!=null)
{
log.info(LogManager.getHeader(context,
"type=ldap-login", "type=ldap_but_already_email"));
context.setIgnoreAuthorization(true);
eperson.setNetid(netid.toLowerCase());
eperson.update();
context.commit();
context.setIgnoreAuthorization(false);
context.setCurrentUser(eperson);
// assign user to groups based on ldap dn
assignGroups(dn, ldap.ldapGroup, context);
return SUCCESS;
}
else
{
if (canSelfRegister(context, request, netid))
{
// TEMPORARILY turn off authorisation
try
{
context.setIgnoreAuthorization(true);
eperson = EPerson.create(context);
if (StringUtils.isNotEmpty(email))
{
eperson.setEmail(email);
}
if (StringUtils.isNotEmpty(ldap.ldapGivenName))
{
eperson.setFirstName(ldap.ldapGivenName);
}
if (StringUtils.isNotEmpty(ldap.ldapSurname))
{
eperson.setLastName(ldap.ldapSurname);
}
if (StringUtils.isNotEmpty(ldap.ldapPhone))
{
eperson.setMetadata("phone", ldap.ldapPhone);
}
eperson.setNetid(netid.toLowerCase());
eperson.setCanLogIn(true);
AuthenticationManager.initEPerson(context, request, eperson);
eperson.update();
context.commit();
context.setCurrentUser(eperson);
// assign user to groups based on ldap dn
assignGroups(dn, ldap.ldapGroup, context);
}
catch (AuthorizeException e)
{
return NO_SUCH_USER;
}
finally
{
context.setIgnoreAuthorization(false);
}
log.info(LogManager.getHeader(context, "authenticate",
"type=ldap-login, created ePerson"));
return SUCCESS;
}
else
{
// No auto-registration for valid certs
log.info(LogManager.getHeader(context,
"failed_login", "type=ldap_but_no_record"));
return NO_SUCH_USER;
}
}
}
catch (AuthorizeException e)
{
eperson = null;
}
finally
{
context.setIgnoreAuthorization(false);
}
}
}
}
return BAD_ARGS;
}
/**
* Internal class to manage LDAP query and results, mainly
* because there are multiple values to return.
*/
private static class SpeakerToLDAP {
private Logger log = null;
protected String ldapEmail = null;
protected String ldapGivenName = null;
protected String ldapSurname = null;
protected String ldapPhone = null;
protected String ldapGroup = null;
/** LDAP settings */
String ldap_provider_url = ConfigurationManager.getProperty("authentication-ldap", "provider_url");
String ldap_id_field = ConfigurationManager.getProperty("authentication-ldap", "id_field");
String ldap_search_context = ConfigurationManager.getProperty("authentication-ldap", "search_context");
String ldap_search_scope = ConfigurationManager.getProperty("authentication-ldap", "search_scope");
String ldap_email_field = ConfigurationManager.getProperty("authentication-ldap", "email_field");
String ldap_givenname_field = ConfigurationManager.getProperty("authentication-ldap", "givenname_field");
String ldap_surname_field = ConfigurationManager.getProperty("authentication-ldap", "surname_field");
String ldap_phone_field = ConfigurationManager.getProperty("authentication-ldap", "phone_field");
String ldap_group_field = ConfigurationManager.getProperty("authentication-ldap", "login.groupmap.attribute");
SpeakerToLDAP(Logger thelog)
{
log = thelog;
}
protected String getDNOfUser(String adminUser, String adminPassword, Context context, String netid)
{
// The resultant DN
String resultDN;
// The search scope to use (default to 0)
int ldap_search_scope_value = 0;
try
{
ldap_search_scope_value = Integer.parseInt(ldap_search_scope.trim());
}
catch (NumberFormatException e)
{
// Log the error if it has been set but is invalid
if (ldap_search_scope != null)
{
log.warn(LogManager.getHeader(context,
"ldap_authentication", "invalid search scope: " + ldap_search_scope));
}
}
// Set up environment for creating initial context
Hashtable env = new Hashtable(11);
env.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(javax.naming.Context.PROVIDER_URL, ldap_provider_url);
if ((adminUser != null) && (!adminUser.trim().equals("")) &&
(adminPassword != null) && (!adminPassword.trim().equals("")))
{
// Use admin credencials for search// Authenticate
env.put(javax.naming.Context.SECURITY_AUTHENTICATION, "simple");
env.put(javax.naming.Context.SECURITY_PRINCIPAL, adminUser);
env.put(javax.naming.Context.SECURITY_CREDENTIALS, adminPassword);
}
else
{
// Use anonymous authentication
env.put(javax.naming.Context.SECURITY_AUTHENTICATION, "none");
}
DirContext ctx = null;
try
{
// Create initial context
ctx = new InitialDirContext(env);
Attributes matchAttrs = new BasicAttributes(true);
matchAttrs.put(new BasicAttribute(ldap_id_field, netid));
// look up attributes
try
{
SearchControls ctrls = new SearchControls();
ctrls.setSearchScope(ldap_search_scope_value);
NamingEnumeration