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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()
55 ldap_unbind_ext(_connection, 0, 0);
60 bool LdapAuthenticator::isAvailable() const
62 // 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 its displayname.
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");
74 QString LdapAuthenticator::description() const
76 return tr("Authenticate users using an LDAP server.");
79 QStringList LdapAuthenticator::setupKeys() const
81 // The parameters needed for LDAP.
93 QVariantMap LdapAuthenticator::setupDefaults() const
96 map["Hostname"] = QVariant(QString("ldap://localhost"));
97 map["Port"] = QVariant(DEFAULT_LDAP_PORT);
98 map["UID Attribute"] = QVariant(QString("uid"));
102 void LdapAuthenticator::setConnectionProperties(const QVariantMap &properties)
104 _hostName = properties["Hostname"].toString();
105 _port = properties["Port"].toInt();
106 _baseDN = properties["Base DN"].toString();
107 _filter = properties["Filter"].toString();
108 _bindDN = properties["Bind DN"].toString();
109 _bindPassword = properties["Bind Password"].toString();
110 _uidAttribute = properties["UID Attribute"].toString();
113 // TODO: this code is sufficiently general that in the future, perhaps an abstract
114 // class should be created implementing it.
115 // i.e. a provider that does its own thing and then pokes at the current storage
116 // through the default core method.
117 UserId LdapAuthenticator::validateUser(const QString &username, const QString &password)
119 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())
133 return Core::addUser(username, QString(), backendId());
135 else if (!(Core::checkAuthProvider(quasselID, backendId())))
142 bool LdapAuthenticator::setup(const QVariantMap &settings)
144 setConnectionProperties(settings);
145 bool status = ldapConnect();
149 Authenticator::State LdapAuthenticator::init(const QVariantMap &settings)
151 setConnectionProperties(settings);
153 bool status = ldapConnect();
156 quInfo() << qPrintable(backendId()) << "Authenticator cannot connect.";
160 quInfo() << qPrintable(backendId()) << "Authenticator is ready.";
164 // Method based on abustany LDAP quassel patch.
165 bool LdapAuthenticator::ldapConnect()
167 if (_connection != 0) {
171 int res, v = LDAP_VERSION3;
174 QByteArray serverURIArray;
176 // Convert info to hostname:port.
177 serverURI = _hostName + ":" + QString::number(_port);
178 serverURIArray = serverURI.toLocal8Bit();
179 res = ldap_initialize(&_connection, serverURIArray);
181 if (res != LDAP_SUCCESS) {
182 qWarning() << "Could not connect to LDAP server:" << ldap_err2string(res);
186 res = ldap_set_option(_connection, LDAP_OPT_PROTOCOL_VERSION, (void*)&v);
188 if (res != LDAP_SUCCESS) {
189 qWarning() << "Could not set LDAP protocol version to v3:" << ldap_err2string(res);
190 ldap_unbind_ext(_connection, 0, 0);
198 void LdapAuthenticator::ldapDisconnect()
200 if (_connection == 0) {
204 ldap_unbind_ext(_connection, 0, 0);
208 bool LdapAuthenticator::ldapAuth(const QString &username, const QString &password)
210 if (password.isEmpty()) {
216 // Attempt to establish a connection.
217 if (_connection == 0) {
218 if (not ldapConnect()) {
225 // Convert some things to byte arrays as needed.
226 QByteArray bindPassword = _bindPassword.toLocal8Bit();
227 QByteArray bindDN = _bindDN.toLocal8Bit();
228 QByteArray baseDN = _baseDN.toLocal8Bit();
229 QByteArray uidAttribute = _uidAttribute.toLocal8Bit();
231 cred.bv_val = const_cast<char*>(bindPassword.size() > 0 ? bindPassword.constData() : NULL);
232 cred.bv_len = bindPassword.size();
234 res = ldap_sasl_bind_s(_connection, bindDN.size() > 0 ? bindDN.constData() : 0, LDAP_SASL_SIMPLE, &cred, 0, 0, 0);
236 if (res != LDAP_SUCCESS) {
237 qWarning() << "Refusing connection from" << username << "(LDAP bind failed:" << ldap_err2string(res) << ")";
242 LDAPMessage *msg = NULL, *entry = NULL;
244 const QByteArray ldapQuery = "(&(" + uidAttribute + '=' + username.toLocal8Bit() + ")" + _filter.toLocal8Bit() + ")";
246 res = ldap_search_ext_s(_connection, baseDN.constData(), LDAP_SCOPE_SUBTREE, ldapQuery.constData(), 0, 0, 0, 0, 0, 0, &msg);
248 if (res != LDAP_SUCCESS) {
249 qWarning() << "Refusing connection from" << username << "(LDAP search failed:" << ldap_err2string(res) << ")";
253 if (ldap_count_entries(_connection, msg) > 1) {
254 qWarning() << "Refusing connection from" << username << "(LDAP search returned more than one result)";
259 entry = ldap_first_entry(_connection, msg);
262 qWarning() << "Refusing connection from" << username << "(LDAP search returned no results)";
267 const QByteArray passwordArray = password.toLocal8Bit();
268 cred.bv_val = const_cast<char*>(passwordArray.constData());
269 cred.bv_len = password.size();
271 char *userDN = ldap_get_dn(_connection, entry);
273 res = ldap_sasl_bind_s(_connection, userDN, LDAP_SASL_SIMPLE, &cred, 0, 0, 0);
275 if (res != LDAP_SUCCESS) {
276 qWarning() << "Refusing connection from" << username << "(LDAP authentication failed)";
277 ldap_memfree(userDN);
282 // The original implementation had requiredAttributes. I have not included this code
283 // but it would be easy to re-add if someone wants this feature.
284 // Ben Rosser <bjr@acm.jhu.edu> (12/23/15).
286 ldap_memfree(userDN);