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package org.apache.catalina.realm;
import java.security.Principal;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;
import javax.naming.Context;
import javax.naming.CommunicationException;
import javax.naming.NameNotFoundException;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.NameParser;
import javax.naming.Name;
import javax.naming.AuthenticationException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.Realm;
import org.apache.catalina.util.StringManager;
import org.apache.catalina.util.Base64;
/**
* <p>Implementation of <strong>Realm</strong> that works with a directory
* server accessed via the Java Naming and Directory Interface (JNDI) APIs.
* The following constraints are imposed on the data structure in the
* underlying directory server:</p>
* <ul>
*
* <li>Each user that can be authenticated is represented by an individual
* element in the top level <code>DirContext</code> that is accessed
* via the <code>connectionURL</code> property.</li>
*
* <li>If a socket connection can not be made to the <code>connectURL</code>
* an attempt will be made to use the <code>alternateURL</code> if it
* exists.</li>
*
* <li>Each user element has a distinguished name that can be formed by
* substituting the presented username into a pattern configured by the
* <code>userPattern</code> property.</li>
*
* <li>Alternatively, if the <code>userPattern</code> property is not
* specified, a unique element can be located by searching the directory
* context. In this case:
* <ul>
* <li>The <code>userSearch</code> pattern specifies the search filter
* after substitution of the username.</li>
* <li>The <code>userBase</code> property can be set to the element that
* is the base of the subtree containing users. If not specified,
* the search base is the top-level context.</li>
* <li>The <code>userSubtree</code> property can be set to
* <code>true</code> if you wish to search the entire subtree of the
* directory context. The default value of <code>false</code>
* requests a search of only the current level.</li>
* </ul>
* </li>
*
* <li>The user may be authenticated by binding to the directory with the
* username and password presented. This method is used when the
* <code>userPassword</code> property is not specified.</li>
*
* <li>The user may be authenticated by retrieving the value of an attribute
* from the directory and comparing it explicitly with the value presented
* by the user. This method is used when the <code>userPassword</code>
* property is specified, in which case:
* <ul>
* <li>The element for this user must contain an attribute named by the
* <code>userPassword</code> property.
* <li>The value of the user password attribute is either a cleartext
* String, or the result of passing a cleartext String through the
* <code>RealmBase.digest()</code> method (using the standard digest
* support included in <code>RealmBase</code>).
* <li>The user is considered to be authenticated if the presented
* credentials (after being passed through
* <code>RealmBase.digest()</code>) are equal to the retrieved value
* for the user password attribute.</li>
* </ul></li>
*
* <li>Each group of users that has been assigned a particular role may be
* represented by an individual element in the top level
* <code>DirContext</code> that is accessed via the
* <code>connectionURL</code> property. This element has the following
* characteristics:
* <ul>
* <li>The set of all possible groups of interest can be selected by a
* search pattern configured by the <code>roleSearch</code>
* property.</li>
* <li>The <code>roleSearch</code> pattern optionally includes pattern
* replacements "{0}" for the distinguished name, and/or "{1}" for
* the username, of the authenticated user for which roles will be
* retrieved.</li>
* <li>The <code>roleBase</code> property can be set to the element that
* is the base of the search for matching roles. If not specified,
* the entire context will be searched.</li>
* <li>The <code>roleSubtree</code> property can be set to
* <code>true</code> if you wish to search the entire subtree of the
* directory context. The default value of <code>false</code>
* requests a search of only the current level.</li>
* <li>The element includes an attribute (whose name is configured by
* the <code>roleName</code> property) containing the name of the
* role represented by this element.</li>
* </ul></li>
*
* <li>In addition, roles may be represented by the values of an attribute
* in the user's element whose name is configured by the
* <code>userRoleName</code> property.</li>
*
* <li>Note that the standard <code><security-role-ref></code> element in
* the web application deployment descriptor allows applications to refer
* to roles programmatically by names other than those used in the
* directory server itself.</li>
* </ul>
*
* <p><strong>TODO</strong> - Support connection pooling (including message
* format objects) so that <code>authenticate()</code> does not have to be
* synchronized.</p>
*
* <p><strong>WARNING</strong> - There is a reported bug against the Netscape
* provider code (com.netscape.jndi.ldap.LdapContextFactory) with respect to
* successfully authenticated a non-existing user. The
* report is here: http://nagoya.apache.org/bugzilla/show_bug.cgi?id=11210 .
* With luck, Netscape has updated their provider code and this is not an
* issue. </p>
*
* @author John Holman
* @author Craig R. McClanahan
* @version $Revision: 1.3 $ $Date: 2007/05/05 05:32:17 $
*/
public class JNDIRealm extends RealmBase {
// ----------------------------------------------------- Instance Variables
/**
* The type of authentication to use
*/
protected String authentication = null;
/**
* The connection username for the server we will contact.
*/
protected String connectionName = null;
/**
* The connection password for the server we will contact.
*/
protected String connectionPassword = null;
/**
* The connection URL for the server we will contact.
*/
protected String connectionURL = null;
/**
* The directory context linking us to our directory server.
*/
protected DirContext context = null;
/**
* The JNDI context factory used to acquire our InitialContext. By
* default, assumes use of an LDAP server using the standard JNDI LDAP
* provider.
*/
protected String contextFactory = "com.sun.jndi.ldap.LdapCtxFactory";
/**
* Descriptive information about this Realm implementation.
*/
protected static final String info =
"org.apache.catalina.realm.JNDIRealm/1.0";
/**
* Descriptive information about this Realm implementation.
*/
protected static final String name = "JNDIRealm";
/**
* The protocol that will be used in the communication with the
* directory server.
*/
protected String protocol = null;
/**
* How should we handle referrals? Microsoft Active Directory can't handle
* the default case, so an application authenticating against AD must
* set referrals to "follow".
*/
protected String referrals = null;
/**
* The base element for user searches.
*/
protected String userBase = "";
/**
* The message format used to search for a user, with "{0}" marking
* the spot where the username goes.
*/
protected String userSearch = null;
/**
* The MessageFormat object associated with the current
* <code>userSearch</code>.
*/
protected MessageFormat userSearchFormat = null;
/**
* Should we search the entire subtree for matching users?
*/
protected boolean userSubtree = false;
/**
* The attribute name used to retrieve the user password.
*/
protected String userPassword = null;
/**
* The message format used to form the distinguished name of a
* user, with "{0}" marking the spot where the specified username
* goes.
*/
protected String userPattern = null;
/**
* The MessageFormat object associated with the current
* <code>userPattern</code>.
*/
protected MessageFormat userPatternFormat = null;
/**
* The base element for role searches.
*/
protected String roleBase = "";
/**
* The MessageFormat object associated with the current
* <code>roleSearch</code>.
*/
protected MessageFormat roleFormat = null;
/**
* The name of an attribute in the user's entry containing
* roles for that user
*/
protected String userRoleName = null;
/**
* The name of the attribute containing roles held elsewhere
*/
protected String roleName = null;
/**
* The message format used to select roles for a user, with "{0}" marking
* the spot where the distinguished name of the user goes.
*/
protected String roleSearch = null;
/**
* Should we search the entire subtree for matching memberships?
*/
protected boolean roleSubtree = false;
/**
* An alternate URL, to which, we should connect if connectionURL fails.
*/
protected String alternateURL;
/**
* The number of connection attempts. If greater than zero we use the
* alternate url.
*/
protected int connectionAttempt = 0;
// ------------------------------------------------------------- Properties
/**
* Return the type of authentication to use.
*/
public String getAuthentication() {
return authentication;
}
/**
* Set the type of authentication to use.
*
* @param authentication The authentication
*/
public void setAuthentication(String authentication) {
this.authentication = authentication;
}
/**
* Return the connection username for this Realm.
*/
public String getConnectionName() {
return (this.connectionName);
}
/**
* Set the connection username for this Realm.
*
* @param connectionName The new connection username
*/
public void setConnectionName(String connectionName) {
this.connectionName = connectionName;
}
/**
* Return the connection password for this Realm.
*/
public String getConnectionPassword() {
return (this.connectionPassword);
}
/**
* Set the connection password for this Realm.
*
* @param connectionPassword The new connection password
*/
public void setConnectionPassword(String connectionPassword) {
this.connectionPassword = connectionPassword;
}
/**
* Return the connection URL for this Realm.
*/
public String getConnectionURL() {
return (this.connectionURL);
}
/**
* Set the connection URL for this Realm.
*
* @param connectionURL The new connection URL
*/
public void setConnectionURL(String connectionURL) {
this.connectionURL = connectionURL;
}
/**
* Return the JNDI context factory for this Realm.
*/
public String getContextFactory() {
return (this.contextFactory);
}
/**
* Set the JNDI context factory for this Realm.
*
* @param contextFactory The new context factory
*/
public void setContextFactory(String contextFactory) {
this.contextFactory = contextFactory;
}
/**
* Return the protocol to be used.
*/
public String getProtocol() {
return protocol;
}
/**
* Set the protocol for this Realm.
*
* @param protocol The new protocol.
*/
public void setProtocol(String protocol) {
this.protocol = protocol;
}
/**
* Returns the current settings for handling JNDI referrals.
*/
public String getReferrals () {
return referrals;
}
/**
* How do we handle JNDI referrals? ignore, follow, or throw
* (see javax.naming.Context.REFERRAL for more information).
*/
public void setReferrals (String referrals) {
this.referrals = referrals;
}
/**
* Return the base element for user searches.
*/
public String getUserBase() {
return (this.userBase);
}
/**
* Set the base element for user searches.
*
* @param userBase The new base element
*/
public void setUserBase(String userBase) {
this.userBase = userBase;
}
/**
* Return the message format pattern for selecting users in this Realm.
*/
public String getUserSearch() {
return (this.userSearch);
}
/**
* Set the message format pattern for selecting users in this Realm.
*
* @param userSearch The new user search pattern
*/
public void setUserSearch(String userSearch) {
this.userSearch = userSearch;
if (userSearch == null)
userSearchFormat = null;
else
userSearchFormat = new MessageFormat(userSearch);
}
/**
* Return the "search subtree for users" flag.
*/
public boolean getUserSubtree() {
return (this.userSubtree);
}
/**
* Set the "search subtree for users" flag.
*
* @param userSubtree The new search flag
*/
public void setUserSubtree(boolean userSubtree) {
this.userSubtree = userSubtree;
}
/**
* Return the user role name attribute name for this Realm.
*/
public String getUserRoleName() {
return userRoleName;
}
/**
* Set the user role name attribute name for this Realm.
*
* @param userRoleName The new userRole name attribute name
*/
public void setUserRoleName(String userRoleName) {
this.userRoleName = userRoleName;
}
/**
* Return the base element for role searches.
*/
public String getRoleBase() {
return (this.roleBase);
}
/**
* Set the base element for role searches.
*
* @param roleBase The new base element
*/
public void setRoleBase(String roleBase) {
this.roleBase = roleBase;
}
/**
* Return the role name attribute name for this Realm.
*/
public String getRoleName() {
return (this.roleName);
}
/**
* Set the role name attribute name for this Realm.
*
* @param roleName The new role name attribute name
*/
public void setRoleName(String roleName) {
this.roleName = roleName;
}
/**
* Return the message format pattern for selecting roles in this Realm.
*/
public String getRoleSearch() {
return (this.roleSearch);
}
/**
* Set the message format pattern for selecting roles in this Realm.
*
* @param roleSearch The new role search pattern
*/
public void setRoleSearch(String roleSearch) {
this.roleSearch = roleSearch;
if (roleSearch == null)
roleFormat = null;
else
roleFormat = new MessageFormat(roleSearch);
}
/**
* Return the "search subtree for roles" flag.
*/
public boolean getRoleSubtree() {
return (this.roleSubtree);
}
/**
* Set the "search subtree for roles" flag.
*
* @param roleSubtree The new search flag
*/
public void setRoleSubtree(boolean roleSubtree) {
this.roleSubtree = roleSubtree;
}
/**
* Return the password attribute used to retrieve the user password.
*/
public String getUserPassword() {
return (this.userPassword);
}
/**
* Set the password attribute used to retrieve the user password.
*
* @param userPassword The new password attribute
*/
public void setUserPassword(String userPassword) {
this.userPassword = userPassword;
}
/**
* Return the message format pattern for selecting users in this Realm.
*/
public String getUserPattern() {
return (this.userPattern);
}
/**
* Set the message format pattern for selecting users in this Realm.
*
* @param userPattern The new user pattern
*/
public void setUserPattern(String userPattern) {
this.userPattern = userPattern;
if (userPattern == null)
userPatternFormat = null;
else
userPatternFormat = new MessageFormat(userPattern);
}
/**
* Getter for property alternateURL.
*
* @return Value of property alternateURL.
*/
public String getAlternateURL() {
return this.alternateURL;
}
/**
* Setter for property alternateURL.
*
* @param alternateURL New value of property alternateURL.
*/
public void setAlternateURL(String alternateURL) {
this.alternateURL = alternateURL;
}
// ---------------------------------------------------------- Realm Methods
/**
* Return the Principal associated with the specified username and
* credentials, if there is one; otherwise return <code>null</code>.
*
* If there are any errors with the JDBC connection, executing
* the query or anything we return null (don't authenticate). This
* event is also logged, and the connection will be closed so that
* a subsequent request will automatically re-open it.
*
* @param username Username of the Principal to look up
* @param credentials Password or other credentials to use in
* authenticating this username
*/
public Principal authenticate(String username, String credentials) {
DirContext context = null;
Principal principal = null;
try {
// Ensure that we have a directory context available
context = open();
// Occassionally the directory context will timeout. Try one more
// time before giving up.
try {
// Authenticate the specified username if possible
principal = authenticate(context, username, credentials);
} catch (CommunicationException e) {
// If contains the work closed. Then assume socket is closed.
// If message is null, assume the worst and allow the
// connection to be closed.
if (e.getMessage()!=null &&
e.getMessage().indexOf("closed") < 0)
throw(e);
// log the exception so we know it's there.
log(sm.getString("jndiRealm.exception"), e);
// close the connection so we know it will be reopened.
if (context != null)
close(context);
// open a new directory context.
context = open();
// Try the authentication again.
principal = authenticate(context, username, credentials);
}
// Release this context
release(context);
// Return the authenticated Principal (if any)
return (principal);
} catch (NamingException e) {
// Log the problem for posterity
log(sm.getString("jndiRealm.exception"), e);
// Close the connection so that it gets reopened next time
if (context != null)
close(context);
// Return "not authenticated" for this request
return (null);
}
}
// -------------------------------------------------------- Package Methods
// ------------------------------------------------------ Protected Methods
/**
* Return the Principal associated with the specified username and
* credentials, if there is one; otherwise return <code>null</code>.
*
* @param context The directory context
* @param username Username of the Principal to look up
* @param credentials Password or other credentials to use in
* authenticating this username
*
* @exception NamingException if a directory server error occurs
*/
public synchronized Principal authenticate(DirContext context,
String username,
String credentials)
throws NamingException {
if (username == null || username.equals("")
|| credentials == null || credentials.equals(""))
return (null);
// Retrieve user information
User user = getUser(context, username);
if (user == null)
return (null);
// Check the user's credentials
if (!checkCredentials(context, user, credentials))
return (null);
// Search for additional roles
List roles = getRoles(context, user);
// Create and return a suitable Principal for this user
return (new GenericPrincipal(this, username, credentials, roles));
}
/**
* Return a User object containing information about the user
* with the specified username, if found in the directory;
* otherwise return <code>null</code>.
*
* If the <code>userPassword</code> configuration attribute is
* specified, the value of that attribute is retrieved from the
* user's directory entry. If the <code>userRoleName</code>
* configuration attribute is specified, all values of that
* attribute are retrieved from the directory entry.
*
* @param context The directory context
* @param username Username to be looked up
*
* @exception NamingException if a directory server error occurs
*/
protected User getUser(DirContext context, String username)
throws NamingException {
User user = null;
// Get attributes to retrieve from user entry
ArrayList list = new ArrayList();
if (userPassword != null)
list.add(userPassword);
if (userRoleName != null)
list.add(userRoleName);
String[] attrIds = new String[list.size()];
list.toArray(attrIds);
// Use pattern or search for user entry
if (userPatternFormat != null) {
user = getUserByPattern(context, username, attrIds);
} else {
user = getUserBySearch(context, username, attrIds);
}
return user;
}
/**
* Use the <code>UserPattern</code> configuration attribute to
* locate the directory entry for the user with the specified
* username and return a User object; otherwise return
* <code>null</code>.
*
* @param context The directory context
* @param username The username
* @param attrIds String[]containing names of attributes to
* retrieve.
*
* @exception NamingException if a directory server error occurs
*/
protected User getUserByPattern(DirContext context,
String username,
String[] attrIds)
throws NamingException {
if (debug >= 2)
log("lookupUser(" + username + ")");
if (username == null || userPatternFormat == null)
return (null);
// Form the dn from the user pattern
String dn = userPatternFormat.format(new String[] { username });
if (debug >= 3) {
log(" dn=" + dn);
}
// Return if no attributes to retrieve
if (attrIds == null || attrIds.length == 0)
return new User(username, dn, null, null);
// Get required attributes from user entry
Attributes attrs = null;
try {
attrs = context.getAttributes(dn, attrIds);
} catch (NameNotFoundException e) {
return (null);
}
if (attrs == null)
return (null);
// Retrieve value of userPassword
String password = null;
if (userPassword != null)
password = getAttributeValue(userPassword, attrs);
// Retrieve values of userRoleName attribute
ArrayList roles = null;
if (userRoleName != null)
roles = addAttributeValues(userRoleName, attrs, roles);
return new User(username, dn, password, roles);
}
/**
* Search the directory to return a User object containing
* information about the user with the specified username, if
* found in the directory; otherwise return <code>null</code>.
*
* @param context The directory context
* @param username The username
* @param attrIds String[]containing names of attributes to retrieve.
*
* @exception NamingException if a directory server error occurs
*/
protected User getUserBySearch(DirContext context,
String username,
String[] attrIds)
throws NamingException {
if (username == null || userSearchFormat == null)
return (null);
// Form the search filter
String filter = userSearchFormat.format(new String[] { username });
// Set up the search controls
SearchControls constraints = new SearchControls();
if (userSubtree) {
constraints.setSearchScope(SearchControls.SUBTREE_SCOPE);
}
else {
constraints.setSearchScope(SearchControls.ONELEVEL_SCOPE);
}
// Specify the attributes to be retrieved
if (attrIds == null)
attrIds = new String[0];
constraints.setReturningAttributes(attrIds);
if (debug > 3) {
log(" Searching for " + username);
log(" base: " + userBase + " filter: " + filter);
}
NamingEnumeration results =
context.search(userBase, filter, constraints);
// Fail if no entries found
if (results == null || !results.hasMore()) {
if (debug > 2) {
log(" username not found");
}
return (null);
}
// Get result for the first entry found
SearchResult result = (SearchResult)results.next();
// Check no further entries were found
if (results.hasMore()) {
log("username " + username + " has multiple entries");
return (null);
}
// Get the entry's distinguished name
NameParser parser = context.getNameParser("");
Name contextName = parser.parse(context.getNameInNamespace());
Name baseName = parser.parse(userBase);
Name entryName = parser.parse(result.getName());
Name name = contextName.addAll(baseName);
name = name.addAll(entryName);
String dn = name.toString();
if (debug > 2)
log(" entry found for " + username + " with dn " + dn);
// Get the entry's attributes
Attributes attrs = result.getAttributes();
if (attrs == null)
return null;
// Retrieve value of userPassword
String password = null;
if (userPassword != null)
password = getAttributeValue(userPassword, attrs);
// Retrieve values of userRoleName attribute
ArrayList roles = null;
if (userRoleName != null)
roles = addAttributeValues(userRoleName, attrs, roles);
return new User(username, dn, password, roles);
}
/**
* Check whether the given User can be authenticated with the
* given credentials. If the <code>userPassword</code>
* configuration attribute is specified, the credentials
* previously retrieved from the directory are compared explicitly
* with those presented by the user. Otherwise the presented
* credentials are checked by binding to the directory as the
* user.
*
* @param context The directory context
* @param user The User to be authenticated
* @param credentials The credentials presented by the user
*
* @exception NamingException if a directory server error occurs
*/
protected boolean checkCredentials(DirContext context,
User user,
String credentials)
throws NamingException {
boolean validated = false;
if (userPassword == null) {
validated = bindAsUser(context, user, credentials);
} else {
validated = compareCredentials(context, user, credentials);
}
if (debug >= 2) {
if (validated) {
log(sm.getString("jndiRealm.authenticateSuccess",
user.username));
} else {
log(sm.getString("jndiRealm.authenticateFailure",
user.username));
}
}
return (validated);
}
/**
* Check whether the credentials presented by the user match those
* retrieved from the directory.
*
* @param context The directory context
* @param user The User to be authenticated
* @param credentials Authentication credentials
*
* @exception NamingException if a directory server error occurs
*/
protected boolean compareCredentials(DirContext context,
User info,
String credentials)
throws NamingException {
if (info == null || credentials == null)
return (false);
String password = info.password;
if (password == null)
return (false);
// Validate the credentials specified by the user
if (debug >= 3)
log(" validating credentials");
boolean validated = false;
if (hasMessageDigest()) {
// iPlanet support if the values starts with {SHA1}
// The string is in a format compatible with Base64.encode not
// the Hex encoding of the parent class.
if (password.startsWith("{SHA}")) {
/* sync since super.digest() does this same thing */
synchronized (this) {
password = password.substring(5);
md.reset();
md.update(credentials.getBytes());
String digestedPassword = new String(Base64.encode(md.digest()));
validated = password.equals(digestedPassword);
}
} else {
// Hex hashes should be compared case-insensitive
validated = (digest(credentials).equalsIgnoreCase(password));
}
} else
validated = (digest(credentials).equals(password));
return (validated);
}
/**
* Check credentials by binding to the directory as the user
*
* @param context The directory context
* @param user The User to be authenticated
* @param credentials Authentication credentials
*
* @exception NamingException if a directory server error occurs
*/
protected boolean bindAsUser(DirContext context,
User user,
String credentials)
throws NamingException {
Attributes attr;
if (credentials == null || user == null)
return (false);
String dn = user.dn;
if (dn == null)
return (false);
// Validate the credentials specified by the user
if (debug >= 3) {
log(" validating credentials by binding as the user");
}
// Set up security environment to bind as the user
context.addToEnvironment(Context.SECURITY_PRINCIPAL, dn);
context.addToEnvironment(Context.SECURITY_CREDENTIALS, credentials);
// Elicit an LDAP bind operation
boolean validated = false;
try {
if (debug > 2) {
log(" binding as " + dn);
}
attr = context.getAttributes("", null);
validated = true;
}
catch (AuthenticationException e) {
if (debug > 2) {
log(" bind attempt failed");
}
}
// Restore the original security environment
if (connectionName != null) {
context.addToEnvironment(Context.SECURITY_PRINCIPAL,
connectionName);
} else {
context.removeFromEnvironment(Context.SECURITY_PRINCIPAL);
}
if (connectionPassword != null) {
context.addToEnvironment(Context.SECURITY_CREDENTIALS,
connectionPassword);
}
else {
context.removeFromEnvironment(Context.SECURITY_CREDENTIALS);
}
return (validated);
}
/**
* Return a List of roles associated with the given User. Any
* roles present in the user's directory entry are supplemented by
* a directory search. If no roles are associated with this user,
* a zero-length List is returned.
*
* @param context The directory context we are searching
* @param user The User to be checked
*
* @exception NamingException if a directory server error occurs
*/
protected List getRoles(DirContext context, User user)
throws NamingException {
if (user == null)
return (null);
String dn = user.dn;
String username = user.username;
if (dn == null || username == null)
return (null);
if (debug >= 2)
log(" getRoles(" + dn + ")");
// Start with roles retrieved from the user entry
ArrayList list = user.roles;
if (list == null) {
list = new ArrayList();
}
// Are we configured to do role searches?
if ((roleFormat == null) || (roleName == null))
return (list);
// Set up parameters for an appropriate search
String filter = roleFormat.format(new String[] { dn, username });
SearchControls controls = new SearchControls();
if (roleSubtree)
controls.setSearchScope(SearchControls.SUBTREE_SCOPE);
else
controls.setSearchScope(SearchControls.ONELEVEL_SCOPE);
controls.setReturningAttributes(new String[] {roleName});
// Perform the configured search and process the results
if (debug >= 3) {
log(" Searching role base '" + roleBase + "' for attribute '" +
roleName + "'");
log(" With filter expression '" + filter + "'");
}
NamingEnumeration results =
context.search(roleBase, filter, controls);
if (results == null)
return (list); // Should never happen, but just in case ...
while (results.hasMore()) {
SearchResult result = (SearchResult) results.next();
Attributes attrs = result.getAttributes();
if (attrs == null)
continue;
list = addAttributeValues(roleName, attrs, list);
}
if (debug >= 2) {
if (list != null) {
log(" Returning " + list.size() + " roles");
for (int i=0; i<list.size(); i++)
log( " Found role " + list.get(i));
} else {
log(" getRoles about to return null ");
}
}
return (list);
}
/**
* Return a String representing the value of the specified attribute.
*
* @param attrId Attribute name
* @param attrs Attributes containing the required value
*
* @exception NamingException if a directory server error occurs
*/
private String getAttributeValue(String attrId, Attributes attrs)
throws NamingException {
if (debug >= 3)
log(" retrieving attribute " + attrId);
if (attrId == null || attrs == null)
return null;
Attribute attr = attrs.get(attrId);
if (attr == null)
return (null);
Object value = attr.get();
if (value == null)
return (null);
String valueString = null;
if (value instanceof byte[])
valueString = new String((byte[]) value);
else
valueString = value.toString();
return valueString;
}
/**
* Add values of a specified attribute to a list
*
* @param attrId Attribute name
* @param attrs Attributes containing the new values
* @param values ArrayList containing values found so far
*
* @exception NamingException if a directory server error occurs
*/
private ArrayList addAttributeValues(String attrId,
Attributes attrs,
ArrayList values)
throws NamingException{
if (debug >= 3)
log(" retrieving values for attribute " + attrId);
if (attrId == null || attrs == null)
return values;
if (values == null)
values = new ArrayList();
Attribute attr = attrs.get(attrId);
if (attr == null)
return (values);
NamingEnumeration e = attr.getAll();
while(e.hasMore()) {
String value = (String)e.next();
values.add(value);
}
return values;
}
/**
* Close any open connection to the directory server for this Realm.
*
* @param context The directory context to be closed
*/
protected void close(DirContext context) {
// Do nothing if there is no opened connection
if (context == null)
return;
// Close our opened connection
try {
if (debug >= 1)
log("Closing directory context");
context.close();
} catch (NamingException e) {
log(sm.getString("jndiRealm.close"), e);
}
this.context = null;
}
/**
* Return a short name for this Realm implementation.
*/
protected String getName() {
return (this.name);
}
/**
* Return the password associated with the given principal's user name.
*/
protected String getPassword(String username) {
return (null);
}
/**
* Return the Principal associated with the given user name.
*/
protected Principal getPrincipal(String username) {
return (null);
}
/**
* Open (if necessary) and return a connection to the configured
* directory server for this Realm.
*
* @exception NamingException if a directory server error occurs
*/
protected DirContext open() throws NamingException {
// Do nothing if there is a directory server connection already open
if (context != null)
return (context);
try {
// Ensure that we have a directory context available
context = new InitialDirContext(getDirectoryContextEnvironment());
} catch (NamingException e) {
connectionAttempt = 1;
// log the first exception.
log(sm.getString("jndiRealm.exception"), e);
// Try connecting to the alternate url.
context = new InitialDirContext(getDirectoryContextEnvironment());
} finally {
// reset it in case the connection times out.
// the primary may come back.
connectionAttempt = 0;
}
return (context);
}
/**
* Create our directory context configuration.
*
* @return java.util.Hashtable the configuration for the directory context.
*/
protected Hashtable getDirectoryContextEnvironment() {
Hashtable env = new Hashtable();
// Configure our directory context environment.
if (debug >= 1 && connectionAttempt == 0)
log("Connecting to URL " + connectionURL);
else if (debug >= 1 && connectionAttempt > 0)
log("Connecting to URL " + alternateURL);
env.put(Context.INITIAL_CONTEXT_FACTORY, contextFactory);
if (connectionName != null)
env.put(Context.SECURITY_PRINCIPAL, connectionName);
if (connectionPassword != null)
env.put(Context.SECURITY_CREDENTIALS, connectionPassword);
if (connectionURL != null && connectionAttempt == 0)
env.put(Context.PROVIDER_URL, connectionURL);
else if (alternateURL != null && connectionAttempt > 0)
env.put(Context.PROVIDER_URL, alternateURL);
if (authentication != null)
env.put(Context.SECURITY_AUTHENTICATION, authentication);
if (protocol != null)
env.put(Context.SECURITY_PROTOCOL, protocol);
if (referrals != null)
env.put(Context.REFERRAL, referrals);
return env;
}
/**
* Release our use of this connection so that it can be recycled.
*
* @param context The directory context to release
*/
protected void release(DirContext context) {
; // NO-OP since we are not pooling anything
}
// ------------------------------------------------------ Lifecycle Methods
/**
* Prepare for active use of the public methods of this Component.
*
* @exception LifecycleException if this component detects a fatal error
* that prevents it from being started
*/
public void start() throws LifecycleException {
// Validate that we can open our connection
try {
open();
} catch (NamingException e) {
throw new LifecycleException(sm.getString("jndiRealm.open"), e);
}
// Perform normal superclass initialization
super.start();
}
/**
* Gracefully shut down active use of the public methods of this Component.
*
* @exception LifecycleException if this component detects a fatal error
* that needs to be reported
*/
public void stop() throws LifecycleException {
// Perform normal superclass finalization
super.stop();
// Close any open directory server connection
close(this.context);
}
}
// ------------------------------------------------------ Private Classes
/**
* A private class representing a User
*/
class User {
String username = null;
String dn = null;
String password = null;
ArrayList roles = null;
User(String username,
String dn,
String password,
ArrayList roles) {
this.username = username;
this.dn = dn;
this.password = password;
this.roles = roles;
}
}
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