YAY for LDAP oper blocks! :D

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@9101 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 176 insertions, 0 deletions

diff --git a/src/modules/extra/m_ldapoper.cpp b/src/modules/extra/m_ldapoper.cpp
new file mode 100644
index 000000000..61e518dcf
--- /dev/null
+++ b/src/modules/extra/m_ldapoper.cpp
@@ -0,0 +1,176 @@
+/*       +------------------------------------+
+ *       | 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"
+
+#include <ldap.h>
+
+/* $ModDesc: Allow/Deny connections based upon answer from LDAP server */
+/* $LinkerFlags: -lldap */
+
+class ModuleLDAPAuth : public Module
+{
+	std::string base;
+	std::string ldapserver;
+	std::string username;
+	std::string password;
+	int searchscope;
+	LDAP *conn;
+	
+public:
+	ModuleLDAPAuth(InspIRCd* Me)
+	: Module::Module(Me)
+	{
+		conn = NULL;
+		Implementation eventlist[] = { I_OnRehash, I_OnPassCompare };
+		ServerInstance->Modules->Attach(eventlist, this, 2);
+		OnRehash(NULL,"");
+	}
+
+	virtual ~ModuleLDAPAuth()
+	{
+		if (conn)
+			ldap_unbind_ext(conn, NULL, NULL);
+	}
+
+	virtual void OnRehash(User* user, const std::string &parameter)
+	{
+		ConfigReader Conf(ServerInstance);
+		
+		base 			= Conf.ReadValue("ldapoper", "baserdn", 0);
+		ldapserver		= Conf.ReadValue("ldapoper", "server", 0);
+		std::string scope	= Conf.ReadValue("ldapoper", "searchscope", 0);
+		username		= Conf.ReadValue("ldapoper", "binddn", 0);
+		password		= Conf.ReadValue("ldapoper", "bindauth", 0);
+		
+		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_ext(conn, NULL, NULL);
+		int res, v = LDAP_VERSION3;
+		res = ldap_initialize(&conn, ldapserver.c_str());
+		if (res != LDAP_SUCCESS)
+		{
+			conn = NULL;
+			return false;			
+		}
+		
+		res = ldap_set_option(conn, LDAP_OPT_PROTOCOL_VERSION, (void *)&v);
+		if (res != LDAP_SUCCESS)
+		{
+			ldap_unbind_ext(conn, NULL, NULL);
+			conn = NULL;
+			return false;
+		}
+		return true;
+	}
+
+        virtual int OnPassCompare(Extensible* ex, const std::string &data, const std::string &input, const std::string &hashtype)
+        {
+		User* user = dynamic_cast<User*>(ex);
+                if (hashtype == "ldap")
+		{
+                        if (LookupOper(user, data, input))
+                        {
+				/* This is an ldap oper and has been found, claim the OPER command */
+                                return 1;
+                        }
+                }
+		/* We don't know this oper! */
+                return 0;
+        }
+
+	bool LookupOper(User* user, const std::string &what, const std::string &opassword)
+	{
+		if (conn == NULL)
+			if (!Connect())
+				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_len = password.length();
+
+		if ((res = ldap_sasl_bind_s(conn, username.c_str(), LDAP_SASL_SIMPLE, &cred, NULL, NULL, NULL)) != LDAP_SUCCESS)
+		{
+			free(authpass);
+			ldap_unbind_ext(conn, NULL, NULL);
+			conn = NULL;
+			return false;
+		}
+		free(authpass);
+
+		LDAPMessage *msg, *entry;
+		if ((res = ldap_search_ext_s(conn, base.c_str(), searchscope, what.c_str(), NULL, 0, NULL, NULL, NULL, 0, &msg)) != LDAP_SUCCESS)
+		{
+			return false;
+		}
+		if (ldap_count_entries(conn, msg) > 1)
+		{
+			ldap_msgfree(msg);
+			return false;
+		}
+		if ((entry = ldap_first_entry(conn, msg)) == NULL)
+		{
+			ldap_msgfree(msg);
+			return false;
+		}
+		authpass = strdup(opassword.c_str());
+		cred.bv_val = authpass;
+		cred.bv_len = opassword.length();
+		if ((res = ldap_sasl_bind_s(conn, ldap_get_dn(conn, entry), LDAP_SASL_SIMPLE, &cred, NULL, NULL, NULL)) == LDAP_SUCCESS)
+		{
+			free(authpass);
+			ldap_msgfree(msg);
+			return true;
+		}
+		else
+		{
+			free(authpass);
+			ldap_msgfree(msg);
+			return false;
+		} 
+	}
+
+	virtual Version GetVersion()
+	{
+		return Version(1,2,0,0,VF_VENDOR,API_VERSION);
+	}
+	
+};
+
+MODULE_INIT(ModuleLDAPAuth)