Fuckin finally!

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@9080 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 200 insertions, 0 deletions

diff --git a/src/modules/extra/m_ldapauth.cpp b/src/modules/extra/m_ldapauth.cpp
new file mode 100644
index 000000000..166624bc2
--- /dev/null
+++ b/src/modules/extra/m_ldapauth.cpp
@@ -0,0 +1,200 @@
+/*       +------------------------------------+
+ *       | Inspire Internet Relay Chat Daemon |
+ *       +------------------------------------+
+ *
+ *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
+ * See: http://www.inspircd.org/wiki/index.php/Credits
+ *
+ * This program is free but copyrighted software; see
+ *            the file COPYING for 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
+ */
+
+#include "inspircd.h"
+#include "users.h"
+#include "channels.h"
+#include "modules.h"
+
+/* FIXME */
+#define LDAP_DEPRECATED 1
+#include <ldap.h>
+
+/* $ModDesc: Allow/Deny connections based upon answer from LDAP server */
+/* $LinkerFlags: -lldap */
+
+class ModuleLDAPAuth : public Module
+{
+	std::string base;
+	std::string attribute;
+	std::string ldapserver;
+	std::string allowpattern;
+	std::string killreason;
+	int searchscope;
+	bool verbose;
+	LDAP *conn;
+	
+public:
+	ModuleLDAPAuth(InspIRCd* Me)
+	: Module::Module(Me)
+	{
+		conn = NULL;
+		Implementation eventlist[] = { I_OnUserDisconnect, I_OnCheckReady, I_OnRehash, I_OnUserRegister };
+		ServerInstance->Modules->Attach(eventlist, this, 4);
+		OnRehash(NULL,"");
+	}
+
+	virtual ~ModuleLDAPAuth()
+	{
+		if (conn)
+			ldap_unbind_s(conn);
+	}
+
+	virtual void OnRehash(User* user, const std::string &parameter)
+	{
+		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);
+		verbose		= Conf.ReadFlag("ldapauth", "verbose", 0);		/* Set to true if failed connects should be reported to operators */
+		
+		if (scope == "base")
+			searchscope = LDAP_SCOPE_BASE;
+		else if (scope == "onelevel")
+			searchscope = LDAP_SCOPE_ONELEVEL;
+		else searchscope = LDAP_SCOPE_SUBTREE;
+		
+		Connect();
+	}
+
+	bool Connect()
+	{
+		if (conn != NULL)
+			ldap_unbind_s(conn);
+		int res, v = LDAP_VERSION3;
+		res = ldap_initialize(&conn, ldapserver.c_str());
+		if (res != LDAP_SUCCESS)
+		{
+			if (verbose)
+				ServerInstance->SNO->WriteToSnoMask('A', "LDAP connection failed: %s", ldap_err2string(res));
+			conn = NULL;
+			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));
+			ldap_unbind_s(conn);				
+			conn = NULL;
+			return false;
+		}
+		return true;
+	}
+
+	virtual int OnUserRegister(User* user)
+	{
+		if ((!allowpattern.empty()) && (ServerInstance->MatchText(user->nick,allowpattern)))
+		{
+			user->Extend("ldapauthed");
+			return 0;
+		}
+
+		if (!CheckCredentials(user))
+		{
+			User::QuitUser(ServerInstance,user,killreason);
+			return 1;
+		}
+		return 0;
+	}
+
+	bool CheckCredentials(User* user)
+	{
+		if (conn == NULL)
+			if (!Connect())
+				return false;
+
+		int res;
+		// bind anonymously
+		if ((res = ldap_simple_bind_s(conn, "", "")) != LDAP_SUCCESS)
+		{	
+			if (verbose)
+				ServerInstance->SNO->WriteToSnoMask('A', "Forbidden connection from %s!%s@%s (LDAP bind anonymously failed: %s)", user->nick, user->ident, user->host, ldap_err2string(res));
+			ldap_unbind_s(conn);				
+			conn = NULL;
+			return false;
+		}
+		LDAPMessage *msg, *entry;
+		std::string what = (attribute + "=" + user->nick);
+		if ((res = ldap_search_s(conn, base.c_str(), searchscope, what.c_str(), NULL, 0, &msg)) != LDAP_SUCCESS)
+		{
+			if (verbose)
+				ServerInstance->SNO->WriteToSnoMask('A', "Forbidden connection from %s!%s@%s (LDAP search failed: %s)", user->nick, user->ident, user->host, 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, user->ident, user->host, ldap_err2string(res));
+			ldap_msgfree(msg);
+			return false;
+		}
+		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, user->ident, user->host, ldap_err2string(res));
+			ldap_msgfree(msg);
+			return false;
+		}
+		if ((res = ldap_simple_bind_s(conn, ldap_get_dn(conn, entry), user->password)) == LDAP_SUCCESS)
+		{
+			ldap_msgfree(msg);
+			user->Extend("ldapauthed");
+			return true;
+		}
+		else
+		{
+			if (verbose)
+				ServerInstance->SNO->WriteToSnoMask('A', "Forbidden connection from %s!%s@%s (%s)", user->nick, user->ident, user->host, ldap_err2string(res));
+			ldap_msgfree(msg);
+			user->Extend("ldapauth_failed");
+			return false;
+		} 
+	}
+	
+	
+	virtual void OnUserDisconnect(User* user)
+	{
+		user->Shrink("ldapauthed");
+		user->Shrink("ldapauth_failed");		
+	}
+	
+	virtual bool OnCheckReady(User* user)
+	{
+		return user->GetExt("ldapauthed");
+	}
+
+	virtual Version GetVersion()
+	{
+		return Version(4,0,0,0,VF_VENDOR,API_VERSION);
+	}
+	
+};
+
+MODULE_INIT(ModuleLDAPAuth)
+