From b94965e87929c6b4e42f9a2078dc0d910cc2637d Mon Sep 17 00:00:00 2001
From: James Moger <james.moger@gitblit.com>
Date: Wed, 09 May 2012 07:59:00 -0400
Subject: [PATCH] Merge pull request #17 from peterloron/master
---
src/com/gitblit/LdapUserService.java | 319 +++++++++++++++++++++++++++++++++++++++--------------
1 files changed, 234 insertions(+), 85 deletions(-)
diff --git a/src/com/gitblit/LdapUserService.java b/src/com/gitblit/LdapUserService.java
index 3ec45e1..78b5f99 100644
--- a/src/com/gitblit/LdapUserService.java
+++ b/src/com/gitblit/LdapUserService.java
@@ -17,23 +17,26 @@
package com.gitblit;
import java.io.File;
-import java.text.MessageFormat;
-import java.util.HashSet;
-import java.util.Hashtable;
-import java.util.Set;
-
-import javax.naming.Context;
-import javax.naming.NamingException;
-import javax.naming.directory.DirContext;
-import javax.naming.directory.InitialDirContext;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.security.GeneralSecurityException;
+import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.gitblit.models.TeamModel;
import com.gitblit.models.UserModel;
-import com.gitblit.utils.ConnectionUtils.BlindSSLSocketFactory;
import com.gitblit.utils.StringUtils;
+import com.unboundid.ldap.sdk.Attribute;
+import com.unboundid.ldap.sdk.LDAPConnection;
+import com.unboundid.ldap.sdk.LDAPException;
+import com.unboundid.ldap.sdk.LDAPSearchException;
+import com.unboundid.ldap.sdk.SearchResult;
+import com.unboundid.ldap.sdk.SearchResultEntry;
+import com.unboundid.ldap.sdk.SearchScope;
+import com.unboundid.util.ssl.SSLUtil;
+import com.unboundid.util.ssl.TrustAllTrustManager;
/**
* Implementation of an LDAP user service.
@@ -43,8 +46,7 @@
public class LdapUserService extends GitblitUserService {
public static final Logger logger = LoggerFactory.getLogger(LdapUserService.class);
- private final String CONTEXT_FACTORY = "com.sun.jndi.ldap.LdapCtxFactory";
-
+
private IStoredSettings settings;
public LdapUserService() {
@@ -54,11 +56,41 @@
@Override
public void setup(IStoredSettings settings) {
this.settings = settings;
- String file = settings.getString(Keys.realm.ldap_backingUserService, "users.conf");
+ String file = settings.getString(Keys.realm.ldap.backingUserService, "users.conf");
File realmFile = GitBlit.getFileOrFolder(file);
serviceImpl = createUserService(realmFile);
logger.info("LDAP User Service backed by " + serviceImpl.toString());
+ }
+
+ private LDAPConnection getLdapConnection() {
+ try {
+ URI ldapUrl = new URI(settings.getRequiredString(Keys.realm.ldap.server));
+ String bindUserName = settings.getString(Keys.realm.ldap.username, "");
+ String bindPassword = settings.getString(Keys.realm.ldap.password, "");
+ int ldapPort = ldapUrl.getPort();
+
+ if (ldapUrl.getScheme().equalsIgnoreCase("ldaps")) { // SSL
+ if (ldapPort == -1) // Default Port
+ ldapPort = 636;
+
+ SSLUtil sslUtil = new SSLUtil(new TrustAllTrustManager());
+ return new LDAPConnection(sslUtil.createSSLSocketFactory(), ldapUrl.getHost(), ldapPort, bindUserName, bindPassword);
+ } else {
+ if (ldapPort == -1) // Default Port
+ ldapPort = 389;
+
+ return new LDAPConnection(ldapUrl.getHost(), ldapPort, bindUserName, bindPassword);
+ }
+ } catch (URISyntaxException e) {
+ logger.error("Bad LDAP URL, should be in the form: ldap(s)://<server>:<port>", e);
+ } catch (GeneralSecurityException e) {
+ logger.error("Unable to create SSL Connection", e);
+ } catch (LDAPException e) {
+ logger.error("Error Connecting to LDAP", e);
+ }
+
+ return null;
}
/**
@@ -74,6 +106,29 @@
}
/**
+ * If no displayName pattern is defined then Gitblit can manage the display name.
+ *
+ * @return true if Gitblit can manage the user display name
+ * @since 1.0.0
+ */
+ @Override
+ public boolean supportsDisplayNameChanges() {
+ return StringUtils.isEmpty(settings.getString(Keys.realm.ldap.displayName, ""));
+ }
+
+ /**
+ * If no email pattern is defined then Gitblit can manage the email address.
+ *
+ * @return true if Gitblit can manage the user email address
+ * @since 1.0.0
+ */
+ @Override
+ public boolean supportsEmailAddressChanges() {
+ return StringUtils.isEmpty(settings.getString(Keys.realm.ldap.email, ""));
+ }
+
+
+ /**
* If the LDAP server will maintain team memberships then LdapUserService
* will not allow team membership changes. In this scenario all team
* changes must be made on the LDAP server by the LDAP administrator.
@@ -82,7 +137,7 @@
* @since 1.0.0
*/
public boolean supportsTeamMembershipChanges() {
- return !settings.getBoolean(Keys.realm.ldap_maintainTeams, false);
+ return !settings.getBoolean(Keys.realm.ldap.maintainTeams, false);
}
/**
@@ -98,75 +153,156 @@
@Override
public UserModel authenticate(String username, char[] password) {
- String domainUser = getDomainUsername(username);
- DirContext ctx = getDirContext(domainUser, new String(password));
- // TODO do we need a bind here?
- if (ctx != null) {
- String simpleUsername = getSimpleUsername(username);
- UserModel user = getUserModel(simpleUsername);
- if (user == null) {
- // create user object for new authenticated user
- user = new UserModel(simpleUsername.toLowerCase());
- }
- user.password = new String(password);
+ String simpleUsername = getSimpleUsername(username);
+
+ LDAPConnection ldapConnection = getLdapConnection();
+ if (ldapConnection != null) {
+ // Find the logging in user's DN
+ String accountBase = settings.getString(Keys.realm.ldap.accountBase, "");
+ String accountPattern = settings.getString(Keys.realm.ldap.accountPattern, "(&(objectClass=person)(sAMAccountName=${username}))");
+ accountPattern = StringUtils.replace(accountPattern, "${username}", escapeLDAPSearchFilter(simpleUsername));
- if (!supportsTeamMembershipChanges()) {
- // Teams are specified in LDAP server
- // TODO search LDAP for team memberships
- Set<String> foundTeams = new HashSet<String>();
- for (String team : foundTeams) {
- TeamModel model = getTeamModel(team);
- if (model == null) {
- // create the team
- model = new TeamModel(team.toLowerCase());
- updateTeamModel(model);
+ SearchResult result = doSearch(ldapConnection, accountBase, accountPattern);
+ if (result != null && result.getEntryCount() == 1) {
+ SearchResultEntry loggingInUser = result.getSearchEntries().get(0);
+ String loggingInUserDN = loggingInUser.getDN();
+
+ if (isAuthenticated(ldapConnection, loggingInUserDN, new String(password))) {
+ logger.debug("LDAP authenticated: " + username);
+
+ UserModel user = getUserModel(simpleUsername);
+ if (user == null) // create user object for new authenticated user
+ user = new UserModel(simpleUsername);
+
+
+
+ if (!supportsTeamMembershipChanges())
+ getTeamsFromLdap(ldapConnection, simpleUsername, loggingInUser, user);
+
+ // Get User Attributes
+ setUserAttributes(user, loggingInUser);
+
+ // Push the ldap looked up values to backing file
+ super.updateUserModel(user);
+ if (!supportsTeamMembershipChanges()) {
+ for (TeamModel userTeam : user.teams)
+ updateTeamModel(userTeam);
}
- // add team to the user
- user.teams.add(model);
+
+ return user;
}
}
-
- try {
- ctx.close();
- } catch (NamingException e) {
- logger.error("Can not close context", e);
- }
- return user;
- }
+ }
+
return null;
- }
-
- protected DirContext getDirContext() {
- String username = settings.getString(Keys.realm.ldap_username, "");
- String password = settings.getString(Keys.realm.ldap_password, "");
- return getDirContext(username, password);
}
- protected DirContext getDirContext(String username, String password) {
- try {
- String server = settings.getRequiredString(Keys.realm.ldap_server);
- Hashtable<String, String> env = new Hashtable<String, String>();
- env.put(Context.INITIAL_CONTEXT_FACTORY, CONTEXT_FACTORY);
- env.put(Context.PROVIDER_URL, server);
- if (server.startsWith("ldaps:")) {
- env.put("java.naming.ldap.factory.socket", BlindSSLSocketFactory.class.getName());
- }
- // TODO consider making this a setting
- env.put("com.sun.jndi.ldap.read.timeout", "5000");
+ private void setAdminAttribute(UserModel user) {
+ user.canAdmin = false;
+ List<String> admins = settings.getStrings(Keys.realm.ldap.admins);
+ for (String admin : admins) {
+ if (admin.startsWith("@")) { // Team
+ if (user.getTeam(admin.substring(1)) != null)
+ user.canAdmin = true;
+ } else
+ if (user.getName().equalsIgnoreCase(admin))
+ user.canAdmin = true;
+ }
+ }
+
+ private void setUserAttributes(UserModel user, SearchResultEntry userEntry) {
+ // Is this user an admin?
+ setAdminAttribute(user);
+
+ // Don't want visibility into the real password, make up a dummy
+ user.password = "StoredInLDAP";
+
+ // Get full name Attribute
+ String displayName = settings.getString(Keys.realm.ldap.displayName, "");
+ if (!StringUtils.isEmpty(displayName)) {
+ // Replace embedded ${} with attributes
+ if (displayName.contains("${")) {
+ for (Attribute userAttribute : userEntry.getAttributes())
+ displayName = StringUtils.replace(displayName, "${" + userAttribute.getName() + "}", userAttribute.getValue());
- if (!StringUtils.isEmpty(username)) {
- // authenticated login
- env.put(Context.SECURITY_AUTHENTICATION, "simple");
- env.put(Context.SECURITY_PRINCIPAL, getDomainUsername(username));
- env.put(Context.SECURITY_CREDENTIALS, password == null ? "":password.trim());
+ user.displayName = displayName;
+ } else {
+ user.displayName = userEntry.getAttribute(displayName).getValue();
}
- return new InitialDirContext(env);
- } catch (NamingException e) {
- logger.warn(MessageFormat.format("Error connecting to LDAP with credentials. Please check {0}, {1}, and {2}",
- Keys.realm.ldap_server, Keys.realm.ldap_username, Keys.realm.ldap_password), e);
+ }
+
+ // Get email address Attribute
+ String email = settings.getString(Keys.realm.ldap.email, "");
+ if (!StringUtils.isEmpty(email)) {
+ if (email.contains("${")) {
+ for (Attribute userAttribute : userEntry.getAttributes())
+ email = StringUtils.replace(email, "${" + userAttribute.getName() + "}", userAttribute.getValue());
+
+ user.emailAddress = email;
+ } else {
+ user.emailAddress = userEntry.getAttribute(email).getValue();
+ }
+ }
+ }
+
+ private void getTeamsFromLdap(LDAPConnection ldapConnection, String simpleUsername, SearchResultEntry loggingInUser, UserModel user) {
+ String loggingInUserDN = loggingInUser.getDN();
+
+ user.teams.clear(); // Clear the users team memberships - we're going to get them from LDAP
+ String groupBase = settings.getString(Keys.realm.ldap.groupBase, "");
+ String groupMemberPattern = settings.getString(Keys.realm.ldap.groupMemberPattern, "(&(objectClass=group)(member=${dn}))");
+
+ groupMemberPattern = StringUtils.replace(groupMemberPattern, "${dn}", escapeLDAPSearchFilter(loggingInUserDN));
+ groupMemberPattern = StringUtils.replace(groupMemberPattern, "${username}", escapeLDAPSearchFilter(simpleUsername));
+
+ // Fill in attributes into groupMemberPattern
+ for (Attribute userAttribute : loggingInUser.getAttributes())
+ groupMemberPattern = StringUtils.replace(groupMemberPattern, "${" + userAttribute.getName() + "}", escapeLDAPSearchFilter(userAttribute.getValue()));
+
+ SearchResult teamMembershipResult = doSearch(ldapConnection, groupBase, groupMemberPattern);
+ if (teamMembershipResult != null && teamMembershipResult.getEntryCount() > 0) {
+ for (int i = 0; i < teamMembershipResult.getEntryCount(); i++) {
+ SearchResultEntry teamEntry = teamMembershipResult.getSearchEntries().get(i);
+ String teamName = teamEntry.getAttribute("cn").getValue();
+
+ TeamModel teamModel = getTeamModel(teamName);
+ if (teamModel == null)
+ teamModel = createTeamFromLdap(teamEntry);
+
+ user.teams.add(teamModel);
+ teamModel.addUser(user.getName());
+ }
+ }
+ }
+
+ private TeamModel createTeamFromLdap(SearchResultEntry teamEntry) {
+ TeamModel answer = new TeamModel(teamEntry.getAttributeValue("cn"));
+ // potentially retrieve other attributes here in the future
+
+ return answer;
+ }
+
+ private SearchResult doSearch(LDAPConnection ldapConnection, String base, String filter) {
+ try {
+ return ldapConnection.search(base, SearchScope.SUB, filter);
+ } catch (LDAPSearchException e) {
+ logger.error("Problem Searching LDAP", e);
+
return null;
}
}
+
+ private boolean isAuthenticated(LDAPConnection ldapConnection, String userDn, String password) {
+ try {
+ // Binding will stop any LDAP-Injection Attacks since the searched-for user needs to bind to that DN
+ ldapConnection.bind(userDn, password);
+ return true;
+ } catch (LDAPException e) {
+ logger.error("Error authenticating user", e);
+ return false;
+ }
+ }
+
/**
* Returns a simple username without any domain prefixes.
@@ -179,22 +315,35 @@
if (lastSlash > -1) {
username = username.substring(lastSlash + 1);
}
+
return username;
}
-
- /**
- * Returns a username with a domain prefix as long as the username does not
- * already have a comain prefix.
- *
- * @param username
- * @return a domain username
- */
- protected String getDomainUsername(String username) {
- String domain = settings.getString(Keys.realm.ldap_domain, null);
- String domainUsername = username;
- if (!StringUtils.isEmpty(domain) && (domainUsername.indexOf('\\') == -1)) {
- domainUsername = domain + "\\" + username;
+
+ // From: https://www.owasp.org/index.php/Preventing_LDAP_Injection_in_Java
+ public static final String escapeLDAPSearchFilter(String filter) {
+ StringBuilder sb = new StringBuilder();
+ for (int i = 0; i < filter.length(); i++) {
+ char curChar = filter.charAt(i);
+ switch (curChar) {
+ case '\\':
+ sb.append("\\5c");
+ break;
+ case '*':
+ sb.append("\\2a");
+ break;
+ case '(':
+ sb.append("\\28");
+ break;
+ case ')':
+ sb.append("\\29");
+ break;
+ case '\u0000':
+ sb.append("\\00");
+ break;
+ default:
+ sb.append(curChar);
+ }
}
- return domainUsername.trim();
+ return sb.toString();
}
}
--
Gitblit v1.9.1