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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.");
87 QVariantList LdapAuthenticator::setupData() const
89 // The parameters needed for LDAP.
91 data << "Hostname" << tr("Hostname") << QString{"ldap://localhost"}
92 << "Port" << tr("Port") << DEFAULT_LDAP_PORT
93 << "BindDN" << tr("Bind DN") << QString{}
94 << "BindPassword" << tr("Bind Password") << QString{}
95 << "BaseDN" << tr("Base DN") << QString{}
96 << "Filter" << tr("Filter") << QString{}
97 << "UidAttribute" << tr("UID Attribute") << QString{"uid"}
103 void LdapAuthenticator::setAuthProperties(const QVariantMap &properties)
105 _hostName = properties["Hostname"].toString();
106 _port = properties["Port"].toInt();
107 _bindDN = properties["BindDN"].toString();
108 _bindPassword = properties["BindPassword"].toString();
109 _baseDN = properties["BaseDN"].toString();
110 _filter = properties["Filter"].toString();
111 _uidAttribute = properties["UidAttribute"].toString();
114 // TODO: this code is sufficiently general that in the future, perhaps an abstract
115 // class should be created implementing it.
116 // i.e. a provider that does its own thing and then pokes at the current storage
117 // through the default core method.
118 UserId LdapAuthenticator::validateUser(const QString &username, const QString &password)
120 bool result = ldapAuth(username, password);
125 // If auth succeeds, but the user has not logged into quassel previously, make
126 // a new user for them and return that ID.
127 // Users created via LDAP have empty passwords, but authenticator column = LDAP.
128 // On the other hand, if auth succeeds and the user already exists, do a final
129 // cross-check to confirm we're using the right auth provider.
130 UserId quasselId = Core::validateUser(username, QString());
131 if (!quasselId.isValid()) {
132 return Core::addUser(username, QString(), backendId());
134 else if (!(Core::checkAuthProvider(quasselId, backendId()))) {
141 bool LdapAuthenticator::setup(const QVariantMap &settings)
143 setAuthProperties(settings);
144 bool status = ldapConnect();
149 Authenticator::State LdapAuthenticator::init(const QVariantMap &settings)
151 setAuthProperties(settings);
153 bool status = ldapConnect();
155 quInfo() << qPrintable(backendId()) << "authenticator cannot connect.";
159 quInfo() << qPrintable(backendId()) << "authenticator is ready.";
163 // Method based on abustany LDAP quassel patch.
164 bool LdapAuthenticator::ldapConnect()
166 if (_connection != 0) {
170 int res, v = LDAP_VERSION3;
173 QByteArray serverURIArray;
175 // Convert info to hostname:port.
176 serverURI = _hostName + ":" + QString::number(_port);
177 serverURIArray = serverURI.toLocal8Bit();
178 res = ldap_initialize(&_connection, serverURIArray);
180 if (res != LDAP_SUCCESS) {
181 qWarning() << "Could not connect to LDAP server:" << ldap_err2string(res);
185 res = ldap_set_option(_connection, LDAP_OPT_PROTOCOL_VERSION, (void*)&v);
187 if (res != LDAP_SUCCESS) {
188 qWarning() << "Could not set LDAP protocol version to v3:" << ldap_err2string(res);
189 ldap_unbind_ext(_connection, 0, 0);
198 void LdapAuthenticator::ldapDisconnect()
200 if (_connection == 0) {
204 ldap_unbind_ext(_connection, 0, 0);
209 bool LdapAuthenticator::ldapAuth(const QString &username, const QString &password)
211 if (password.isEmpty()) {
217 // Attempt to establish a connection.
218 if (_connection == 0) {
219 if (!ldapConnect()) {
226 // Convert some things to byte arrays as needed.
227 QByteArray bindPassword = _bindPassword.toLocal8Bit();
228 QByteArray bindDN = _bindDN.toLocal8Bit();
229 QByteArray baseDN = _baseDN.toLocal8Bit();
230 QByteArray uidAttribute = _uidAttribute.toLocal8Bit();
232 cred.bv_val = (bindPassword.size() > 0 ? bindPassword.data() : NULL);
233 cred.bv_len = bindPassword.size();
235 res = ldap_sasl_bind_s(_connection, bindDN.size() > 0 ? bindDN.constData() : 0, LDAP_SASL_SIMPLE, &cred, 0, 0, 0);
237 if (res != LDAP_SUCCESS) {
238 qWarning() << "Refusing connection from" << username << "(LDAP bind failed:" << ldap_err2string(res) << ")";
243 LDAPMessage *msg = NULL, *entry = NULL;
245 const QByteArray ldapQuery = "(&(" + uidAttribute + '=' + username.toLocal8Bit() + ")" + _filter.toLocal8Bit() + ")";
247 res = ldap_search_ext_s(_connection, baseDN.constData(), LDAP_SCOPE_SUBTREE, ldapQuery.constData(), 0, 0, 0, 0, 0, 0, &msg);
249 if (res != LDAP_SUCCESS) {
250 qWarning() << "Refusing connection from" << username << "(LDAP search failed:" << ldap_err2string(res) << ")";
254 if (ldap_count_entries(_connection, msg) > 1) {
255 qWarning() << "Refusing connection from" << username << "(LDAP search returned more than one result)";
260 entry = ldap_first_entry(_connection, msg);
263 qWarning() << "Refusing connection from" << username << "(LDAP search returned no results)";
268 QByteArray passwordArray = password.toLocal8Bit();
269 cred.bv_val = passwordArray.data();
270 cred.bv_len = password.size();
272 char *userDN = ldap_get_dn(_connection, entry);
274 res = ldap_sasl_bind_s(_connection, userDN, LDAP_SASL_SIMPLE, &cred, 0, 0, 0);
276 if (res != LDAP_SUCCESS) {
277 qWarning() << "Refusing connection from" << username << "(LDAP authentication failed)";
278 ldap_memfree(userDN);
283 // The original implementation had requiredAttributes. I have not included this code
284 // but it would be easy to re-add if someone wants this feature.
285 // Ben Rosser <bjr@acm.jhu.edu> (12/23/15).
287 ldap_memfree(userDN);