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19 ***************************************************************************/
21 /* This file contains an implementation of an LDAP Authenticator, as an example
22 * of what a custom external auth provider could do.
24 * It's based off of this pull request for quassel by abustany:
25 * https://github.com/quassel/quassel/pull/4/
29 #include "ldapauthenticator.h"
35 /* We should use openldap on windows if at all possible, rather than trying to
36 * write some kind of compatiblity routine.
44 LdapAuthenticator::LdapAuthenticator(QObject *parent)
45 : Authenticator(parent),
51 LdapAuthenticator::~LdapAuthenticator()
53 if (_connection != 0) {
54 ldap_unbind_ext(_connection, 0, 0);
59 bool LdapAuthenticator::isAvailable() const
61 // FIXME: probably this should test if we can speak to the LDAP server.
66 QString LdapAuthenticator::backendId() const
68 // We identify the backend to use for the monolithic core by this identifier.
69 // so only change this string if you _really_ have to and make sure the core
70 // setup for the mono client still works ;)
71 return QString("LDAP");
75 QString LdapAuthenticator::displayName() const
81 QString LdapAuthenticator::description() const
83 return tr("Authenticate users using an LDAP server.");
86 QStringList LdapAuthenticator::setupKeys() const
88 // The parameters needed for LDAP.
101 QVariantMap LdapAuthenticator::setupDefaults() const
104 map["Hostname"] = QVariant(QString("ldap://localhost"));
105 map["Port"] = QVariant(DEFAULT_LDAP_PORT);
106 map["UID Attribute"] = QVariant(QString("uid"));
111 void LdapAuthenticator::setAuthProperties(const QVariantMap &properties)
113 _hostName = properties["Hostname"].toString();
114 _port = properties["Port"].toInt();
115 _baseDN = properties["Base DN"].toString();
116 _filter = properties["Filter"].toString();
117 _bindDN = properties["Bind DN"].toString();
118 _bindPassword = properties["Bind Password"].toString();
119 _uidAttribute = properties["UID Attribute"].toString();
122 // TODO: this code is sufficiently general that in the future, perhaps an abstract
123 // class should be created implementing it.
124 // i.e. a provider that does its own thing and then pokes at the current storage
125 // through the default core method.
126 UserId LdapAuthenticator::validateUser(const QString &username, const QString &password)
128 bool result = ldapAuth(username, password);
133 // If auth succeeds, but the user has not logged into quassel previously, make
134 // a new user for them and return that ID.
135 // Users created via LDAP have empty passwords, but authenticator column = LDAP.
136 // On the other hand, if auth succeeds and the user already exists, do a final
137 // cross-check to confirm we're using the right auth provider.
138 UserId quasselId = Core::validateUser(username, QString());
139 if (!quasselId.isValid()) {
140 return Core::addUser(username, QString(), backendId());
142 else if (!(Core::checkAuthProvider(quasselId, backendId()))) {
149 bool LdapAuthenticator::setup(const QVariantMap &settings)
151 setAuthProperties(settings);
152 bool status = ldapConnect();
157 Authenticator::State LdapAuthenticator::init(const QVariantMap &settings)
159 setAuthProperties(settings);
161 bool status = ldapConnect();
163 quInfo() << qPrintable(backendId()) << "Authenticator cannot connect.";
167 quInfo() << qPrintable(backendId()) << "Authenticator is ready.";
171 // Method based on abustany LDAP quassel patch.
172 bool LdapAuthenticator::ldapConnect()
174 if (_connection != 0) {
178 int res, v = LDAP_VERSION3;
181 QByteArray serverURIArray;
183 // Convert info to hostname:port.
184 serverURI = _hostName + ":" + QString::number(_port);
185 serverURIArray = serverURI.toLocal8Bit();
186 res = ldap_initialize(&_connection, serverURIArray);
188 if (res != LDAP_SUCCESS) {
189 qWarning() << "Could not connect to LDAP server:" << ldap_err2string(res);
193 res = ldap_set_option(_connection, LDAP_OPT_PROTOCOL_VERSION, (void*)&v);
195 if (res != LDAP_SUCCESS) {
196 qWarning() << "Could not set LDAP protocol version to v3:" << ldap_err2string(res);
197 ldap_unbind_ext(_connection, 0, 0);
206 void LdapAuthenticator::ldapDisconnect()
208 if (_connection == 0) {
212 ldap_unbind_ext(_connection, 0, 0);
217 bool LdapAuthenticator::ldapAuth(const QString &username, const QString &password)
219 if (password.isEmpty()) {
225 // Attempt to establish a connection.
226 if (_connection == 0) {
227 if (!ldapConnect()) {
234 // Convert some things to byte arrays as needed.
235 QByteArray bindPassword = _bindPassword.toLocal8Bit();
236 QByteArray bindDN = _bindDN.toLocal8Bit();
237 QByteArray baseDN = _baseDN.toLocal8Bit();
238 QByteArray uidAttribute = _uidAttribute.toLocal8Bit();
240 cred.bv_val = (bindPassword.size() > 0 ? bindPassword.data() : NULL);
241 cred.bv_len = bindPassword.size();
243 res = ldap_sasl_bind_s(_connection, bindDN.size() > 0 ? bindDN.constData() : 0, LDAP_SASL_SIMPLE, &cred, 0, 0, 0);
245 if (res != LDAP_SUCCESS) {
246 qWarning() << "Refusing connection from" << username << "(LDAP bind failed:" << ldap_err2string(res) << ")";
251 LDAPMessage *msg = NULL, *entry = NULL;
253 const QByteArray ldapQuery = "(&(" + uidAttribute + '=' + username.toLocal8Bit() + ")" + _filter.toLocal8Bit() + ")";
255 res = ldap_search_ext_s(_connection, baseDN.constData(), LDAP_SCOPE_SUBTREE, ldapQuery.constData(), 0, 0, 0, 0, 0, 0, &msg);
257 if (res != LDAP_SUCCESS) {
258 qWarning() << "Refusing connection from" << username << "(LDAP search failed:" << ldap_err2string(res) << ")";
262 if (ldap_count_entries(_connection, msg) > 1) {
263 qWarning() << "Refusing connection from" << username << "(LDAP search returned more than one result)";
268 entry = ldap_first_entry(_connection, msg);
271 qWarning() << "Refusing connection from" << username << "(LDAP search returned no results)";
276 QByteArray passwordArray = password.toLocal8Bit();
277 cred.bv_val = passwordArray.data();
278 cred.bv_len = password.size();
280 char *userDN = ldap_get_dn(_connection, entry);
282 res = ldap_sasl_bind_s(_connection, userDN, LDAP_SASL_SIMPLE, &cred, 0, 0, 0);
284 if (res != LDAP_SUCCESS) {
285 qWarning() << "Refusing connection from" << username << "(LDAP authentication failed)";
286 ldap_memfree(userDN);
291 // The original implementation had requiredAttributes. I have not included this code
292 // but it would be easy to re-add if someone wants this feature.
293 // Ben Rosser <bjr@acm.jhu.edu> (12/23/15).
295 ldap_memfree(userDN);