-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
*
- * InspIRCd: (C) 2002-2008 InspIRCd Development Team
- * See: http://www.inspircd.org/wiki/index.php/Credits
+ * Copyright (C) 2011 Pierre Carrier <pierre@spotify.com>
+ * Copyright (C) 2009-2010 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
+ * Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2008 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2007 Carsten Valdemar Munk <carsten.munk+inspircd@gmail.com>
*
- * This program is free but copyrighted software; see
- * the file COPYING for details.
+ * This file is part of InspIRCd. InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
*
- * ---------------------------------------------------
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
*
- * Taken from the UnrealIRCd 4.0 SVN version, based on
- * InspIRCd 1.1.x.
- *
- * UnrealIRCd 4.0 (C) 2007 Carsten Valdemar Munk
- * This program is free but copyrighted software; see
- * the file COPYING for details.
- *
- * ---------------------------------------------------
- * Heavily based on SQLauth
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+
#include "inspircd.h"
#include "users.h"
#include "channels.h"
#include <ldap.h>
+#ifdef _WIN32
+# pragma comment(lib, "libldap.lib")
+# pragma comment(lib, "liblber.lib")
+#endif
+
/* $ModDesc: Allow/Deny connections based upon answer from LDAP server */
/* $LinkerFlags: -lldap */
+struct RAIILDAPString
+{
+ char *str;
+
+ RAIILDAPString(char *Str)
+ : str(Str)
+ {
+ }
+
+ ~RAIILDAPString()
+ {
+ ldap_memfree(str);
+ }
+
+ operator char*()
+ {
+ return str;
+ }
+
+ operator std::string()
+ {
+ return str;
+ }
+};
+
+struct RAIILDAPMessage
+{
+ RAIILDAPMessage()
+ {
+ }
+
+ ~RAIILDAPMessage()
+ {
+ dealloc();
+ }
+
+ void dealloc()
+ {
+ ldap_msgfree(msg);
+ }
+
+ operator LDAPMessage*()
+ {
+ return msg;
+ }
+
+ LDAPMessage **operator &()
+ {
+ return &msg;
+ }
+
+ LDAPMessage *msg;
+};
+
class ModuleLDAPAuth : public Module
{
+ LocalIntExt ldapAuthed;
+ LocalStringExt ldapVhost;
std::string base;
std::string attribute;
std::string ldapserver;
std::string killreason;
std::string username;
std::string password;
+ std::string vhost;
+ std::vector<std::string> whitelistedcidrs;
+ std::vector<std::pair<std::string, std::string> > requiredattributes;
int searchscope;
bool verbose;
bool useusername;
LDAP *conn;
-
+
public:
- ModuleLDAPAuth(InspIRCd* Me)
- : Module::Module(Me)
+ ModuleLDAPAuth()
+ : ldapAuthed("ldapauth", this)
+ , ldapVhost("ldapauth_vhost", this)
{
conn = NULL;
- Implementation eventlist[] = { I_OnUserDisconnect, I_OnCheckReady, I_OnRehash, I_OnUserRegister };
- ServerInstance->Modules->Attach(eventlist, this, 4);
- OnRehash(NULL,"");
}
- virtual ~ModuleLDAPAuth()
+ void init()
+ {
+ ServerInstance->Modules->AddService(ldapAuthed);
+ ServerInstance->Modules->AddService(ldapVhost);
+ Implementation eventlist[] = { I_OnCheckReady, I_OnRehash,I_OnUserRegister, I_OnUserConnect };
+ ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
+ OnRehash(NULL);
+ }
+
+ ~ModuleLDAPAuth()
{
if (conn)
ldap_unbind_ext(conn, NULL, NULL);
}
- virtual void OnRehash(User* user, const std::string ¶meter)
- {
- ConfigReader Conf(ServerInstance);
-
- base = Conf.ReadValue("ldapauth", "baserdn", 0);
- attribute = Conf.ReadValue("ldapauth", "attribute", 0);
- ldapserver = Conf.ReadValue("ldapauth", "server", 0);
- allowpattern = Conf.ReadValue("ldapauth", "allowpattern", 0);
- killreason = Conf.ReadValue("ldapauth", "killreason", 0);
- std::string scope = Conf.ReadValue("ldapauth", "searchscope", 0);
- username = Conf.ReadValue("ldapauth", "binddn", 0);
- password = Conf.ReadValue("ldapauth", "bindauth", 0);
- verbose = Conf.ReadFlag("ldapauth", "verbose", 0); /* Set to true if failed connects should be reported to operators */
- useusername = Conf.ReadFlag("ldapauth", "userfield", 0);
-
+ void OnRehash(User* user)
+ {
+ ConfigTag* tag = ServerInstance->Config->ConfValue("ldapauth");
+ whitelistedcidrs.clear();
+ requiredattributes.clear();
+
+ base = tag->getString("baserdn");
+ attribute = tag->getString("attribute");
+ ldapserver = tag->getString("server");
+ allowpattern = tag->getString("allowpattern");
+ killreason = tag->getString("killreason");
+ std::string scope = tag->getString("searchscope");
+ username = tag->getString("binddn");
+ password = tag->getString("bindauth");
+ vhost = tag->getString("host");
+ verbose = tag->getBool("verbose"); /* Set to true if failed connects should be reported to operators */
+ useusername = tag->getBool("userfield");
+
+ ConfigTagList whitelisttags = ServerInstance->Config->ConfTags("ldapwhitelist");
+
+ for (ConfigIter i = whitelisttags.first; i != whitelisttags.second; ++i)
+ {
+ std::string cidr = i->second->getString("cidr");
+ if (!cidr.empty()) {
+ whitelistedcidrs.push_back(cidr);
+ }
+ }
+
+ ConfigTagList attributetags = ServerInstance->Config->ConfTags("ldaprequire");
+
+ for (ConfigIter i = attributetags.first; i != attributetags.second; ++i)
+ {
+ const std::string attr = i->second->getString("attribute");
+ const std::string val = i->second->getString("value");
+
+ if (!attr.empty() && !val.empty())
+ requiredattributes.push_back(make_pair(attr, val));
+ }
+
if (scope == "base")
searchscope = LDAP_SCOPE_BASE;
else if (scope == "onelevel")
searchscope = LDAP_SCOPE_ONELEVEL;
else searchscope = LDAP_SCOPE_SUBTREE;
-
+
Connect();
}
if (res != LDAP_SUCCESS)
{
if (verbose)
- ServerInstance->SNO->WriteToSnoMask('A', "LDAP connection failed: %s", ldap_err2string(res));
+ ServerInstance->SNO->WriteToSnoMask('c', "LDAP connection failed: %s", ldap_err2string(res));
conn = NULL;
- return false;
+ return false;
}
-
+
res = ldap_set_option(conn, LDAP_OPT_PROTOCOL_VERSION, (void *)&v);
if (res != LDAP_SUCCESS)
{
if (verbose)
- ServerInstance->SNO->WriteToSnoMask('A', "LDAP set protocol to v3 failed: %s", ldap_err2string(res));
+ ServerInstance->SNO->WriteToSnoMask('c', "LDAP set protocol to v3 failed: %s", ldap_err2string(res));
ldap_unbind_ext(conn, NULL, NULL);
conn = NULL;
return false;
return true;
}
- virtual int OnUserRegister(User* user)
+ std::string SafeReplace(const std::string &text, std::map<std::string,
+ std::string> &replacements)
{
- if ((!allowpattern.empty()) && (ServerInstance->MatchText(user->nick,allowpattern)))
+ std::string result;
+ result.reserve(MAXBUF);
+
+ for (unsigned int i = 0; i < text.length(); ++i) {
+ char c = text[i];
+ if (c == '$') {
+ // find the first nonalpha
+ i++;
+ unsigned int start = i;
+
+ while (i < text.length() - 1 && isalpha(text[i + 1]))
+ ++i;
+
+ std::string key = text.substr(start, (i - start) + 1);
+ result.append(replacements[key]);
+ } else {
+ result.push_back(c);
+ }
+ }
+
+ return result;
+ }
+
+ virtual void OnUserConnect(LocalUser *user)
+ {
+ std::string* cc = ldapVhost.get(user);
+ if (cc)
{
- user->Extend("ldapauthed");
- return 0;
+ user->ChangeDisplayedHost(cc->c_str());
+ ldapVhost.unset(user);
+ }
+ }
+
+ ModResult OnUserRegister(LocalUser* user)
+ {
+ if ((!allowpattern.empty()) && (InspIRCd::Match(user->nick,allowpattern)))
+ {
+ ldapAuthed.set(user,1);
+ return MOD_RES_PASSTHRU;
+ }
+
+ for (std::vector<std::string>::iterator i = whitelistedcidrs.begin(); i != whitelistedcidrs.end(); i++)
+ {
+ if (InspIRCd::MatchCIDR(user->GetIPString(), *i, ascii_case_insensitive_map))
+ {
+ ldapAuthed.set(user,1);
+ return MOD_RES_PASSTHRU;
+ }
}
if (!CheckCredentials(user))
{
ServerInstance->Users->QuitUser(user, killreason);
- return 1;
+ return MOD_RES_DENY;
}
- return 0;
+ return MOD_RES_PASSTHRU;
}
- bool CheckCredentials(User* user)
+ bool CheckCredentials(LocalUser* user)
{
if (conn == NULL)
if (!Connect())
return false;
+ if (user->password.empty())
+ {
+ if (verbose)
+ ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (No password provided)", user->GetFullRealHost().c_str());
+ return false;
+ }
+
int res;
- char* authpass = strdup(password.c_str());
// bind anonymously if no bind DN and authentication are given in the config
struct berval cred;
- cred.bv_val = authpass;
+ cred.bv_val = const_cast<char*>(password.c_str());
cred.bv_len = password.length();
if ((res = ldap_sasl_bind_s(conn, username.c_str(), LDAP_SASL_SIMPLE, &cred, NULL, NULL, NULL)) != LDAP_SUCCESS)
{
- free(authpass);
- if (verbose)
- ServerInstance->SNO->WriteToSnoMask('A', "Forbidden connection from %s!%s@%s (LDAP bind failed: %s)", user->nick.c_str(), user->ident.c_str(), user->host.c_str(), ldap_err2string(res));
- ldap_unbind_ext(conn, NULL, NULL);
- conn = NULL;
- return false;
+ if (res == LDAP_SERVER_DOWN)
+ {
+ // Attempt to reconnect if the connection dropped
+ if (verbose)
+ ServerInstance->SNO->WriteToSnoMask('a', "LDAP server has gone away - reconnecting...");
+ Connect();
+ res = ldap_sasl_bind_s(conn, username.c_str(), LDAP_SASL_SIMPLE, &cred, NULL, NULL, NULL);
+ }
+
+ if (res != LDAP_SUCCESS)
+ {
+ if (verbose)
+ ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (LDAP bind failed: %s)", user->GetFullRealHost().c_str(), ldap_err2string(res));
+ ldap_unbind_ext(conn, NULL, NULL);
+ conn = NULL;
+ return false;
+ }
}
- free(authpass);
- LDAPMessage *msg, *entry;
- std::string what = (attribute + "=" + (useusername ? user->ident : user->nick));
+ RAIILDAPMessage msg;
+ std::string what;
+ std::string::size_type pos = user->password.find(':');
+ // If a username is provided in PASS, use it, othewrise user their nick or ident
+ if (pos != std::string::npos)
+ {
+ what = (attribute + "=" + user->password.substr(0, pos));
+
+ // Trim the user: prefix, leaving just 'pass' for later password check
+ user->password = user->password.substr(pos + 1);
+ }
+ else
+ {
+ what = (attribute + "=" + (useusername ? user->ident : user->nick));
+ }
if ((res = ldap_search_ext_s(conn, base.c_str(), searchscope, what.c_str(), NULL, 0, NULL, NULL, NULL, 0, &msg)) != LDAP_SUCCESS)
{
if (verbose)
- ServerInstance->SNO->WriteToSnoMask('A', "Forbidden connection from %s!%s@%s (LDAP search failed: %s)", user->nick.c_str(), user->ident.c_str(), user->host.c_str(), ldap_err2string(res));
+ ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (LDAP search failed: %s)", user->GetFullRealHost().c_str(), ldap_err2string(res));
return false;
}
if (ldap_count_entries(conn, msg) > 1)
{
if (verbose)
- ServerInstance->SNO->WriteToSnoMask('A', "Forbidden connection from %s!%s@%s (LDAP search returned more than one result: %s)", user->nick.c_str(), user->ident.c_str(), user->host.c_str(), ldap_err2string(res));
- ldap_msgfree(msg);
+ ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (LDAP search returned more than one result: %s)", user->GetFullRealHost().c_str(), ldap_err2string(res));
return false;
}
+
+ LDAPMessage *entry;
if ((entry = ldap_first_entry(conn, msg)) == NULL)
{
if (verbose)
- ServerInstance->SNO->WriteToSnoMask('A', "Forbidden connection from %s!%s@%s (LDAP search returned no results: %s)", user->nick.c_str(), user->ident.c_str(), user->host.c_str(), ldap_err2string(res));
- ldap_msgfree(msg);
+ ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (LDAP search returned no results: %s)", user->GetFullRealHost().c_str(), ldap_err2string(res));
return false;
}
cred.bv_val = (char*)user->password.data();
cred.bv_len = user->password.length();
- if ((res = ldap_sasl_bind_s(conn, ldap_get_dn(conn, entry), LDAP_SASL_SIMPLE, &cred, NULL, NULL, NULL)) == LDAP_SUCCESS)
- {
- ldap_msgfree(msg);
- user->Extend("ldapauthed");
- return true;
- }
- else
+ RAIILDAPString DN(ldap_get_dn(conn, entry));
+ if ((res = ldap_sasl_bind_s(conn, DN, LDAP_SASL_SIMPLE, &cred, NULL, NULL, NULL)) != LDAP_SUCCESS)
{
if (verbose)
- ServerInstance->SNO->WriteToSnoMask('A', "Forbidden connection from %s!%s@%s (%s)", user->nick.c_str(), user->ident.c_str(), user->host.c_str(), ldap_err2string(res));
- ldap_msgfree(msg);
- user->Extend("ldapauth_failed");
+ ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (%s)", user->GetFullRealHost().c_str(), ldap_err2string(res));
return false;
- }
- }
-
-
- virtual void OnUserDisconnect(User* user)
- {
- user->Shrink("ldapauthed");
- user->Shrink("ldapauth_failed");
+ }
+
+ if (!requiredattributes.empty())
+ {
+ bool authed = false;
+
+ for (std::vector<std::pair<std::string, std::string> >::const_iterator it = requiredattributes.begin(); it != requiredattributes.end(); ++it)
+ {
+ const std::string &attr = it->first;
+ const std::string &val = it->second;
+
+ struct berval attr_value;
+ attr_value.bv_val = const_cast<char*>(val.c_str());
+ attr_value.bv_len = val.length();
+
+ ServerInstance->Logs->Log("m_ldapauth", DEBUG, "LDAP compare: %s=%s", attr.c_str(), val.c_str());
+
+ authed = (ldap_compare_ext_s(conn, DN, attr.c_str(), &attr_value, NULL, NULL) == LDAP_COMPARE_TRUE);
+
+ if (authed)
+ break;
+ }
+
+ if (!authed)
+ {
+ if (verbose)
+ ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (Lacks required LDAP attributes)", user->GetFullRealHost().c_str());
+ return false;
+ }
+ }
+
+ if (!vhost.empty())
+ {
+ irc::commasepstream stream(DN);
+
+ // mashed map of key:value parts of the DN
+ std::map<std::string, std::string> dnParts;
+
+ std::string dnPart;
+ while (stream.GetToken(dnPart))
+ {
+ pos = dnPart.find('=');
+ if (pos == std::string::npos) // malformed
+ continue;
+
+ std::string key = dnPart.substr(0, pos);
+ std::string value = dnPart.substr(pos + 1, dnPart.length() - pos + 1); // +1s to skip the = itself
+ dnParts[key] = value;
+ }
+
+ // change host according to config key
+ ldapVhost.set(user, SafeReplace(vhost, dnParts));
+ }
+
+ ldapAuthed.set(user,1);
+ return true;
}
-
- virtual bool OnCheckReady(User* user)
+
+ ModResult OnCheckReady(LocalUser* user)
{
- return user->GetExt("ldapauthed");
+ return ldapAuthed.get(user) ? MOD_RES_PASSTHRU : MOD_RES_DENY;
}
- virtual Version GetVersion()
+ Version GetVersion()
{
- return Version(1,2,0,0,VF_VENDOR,API_VERSION);
+ return Version("Allow/Deny connections based upon answer from LDAP server", VF_VENDOR);
}
-
+
};
MODULE_INIT(ModuleLDAPAuth)
projects / user / henk / code / inspircd.git / blobdiff