X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fextra%2Fm_ldapauth.cpp;h=5d71e7389b6efb6b1c7619c6bd1c2cfbb5fc929e;hb=cad8e26a8f9a61f6d8a6dfa5127da98101181075;hp=fb1eea70097dc2d8d5247715e48bf47e0db6eed9;hpb=3b6b61dd2625782b32686a3aa8fccd87b5bfd24d;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/extra/m_ldapauth.cpp b/src/modules/extra/m_ldapauth.cpp deleted file mode 120000 index fb1eea700..000000000 --- a/src/modules/extra/m_ldapauth.cpp +++ /dev/null @@ -1 +0,0 @@ -extra/m_ldapauth.cpp \ No newline at end of file diff --git a/src/modules/extra/m_ldapauth.cpp b/src/modules/extra/m_ldapauth.cpp new file mode 100644 index 000000000..5d71e7389 --- /dev/null +++ b/src/modules/extra/m_ldapauth.cpp @@ -0,0 +1,272 @@ +/* + * InspIRCd -- Internet Relay Chat Daemon + * + * Copyright (C) 2011 Pierre Carrier + * Copyright (C) 2009-2010 Robin Burchell + * Copyright (C) 2009 Daniel De Graaf + * Copyright (C) 2008 Pippijn van Steenhoven + * Copyright (C) 2008 Craig Edwards + * Copyright (C) 2008 Dennis Friis + * Copyright (C) 2007 Carsten Valdemar Munk + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + + +#include "inspircd.h" +#include "users.h" +#include "channels.h" +#include "modules.h" + +#include + +#ifdef WINDOWS +# pragma comment(lib, "ldap.lib") +# pragma comment(lib, "lber.lib") +#endif + +/* $ModDesc: Allow/Deny connections based upon answer from LDAP server */ +/* $LinkerFlags: -lldap */ + +class ModuleLDAPAuth : public Module +{ + LocalIntExt ldapAuthed; + std::string base; + std::string attribute; + std::string ldapserver; + std::string allowpattern; + std::string killreason; + std::string username; + std::string password; + std::vector whitelistedcidrs; + int searchscope; + bool verbose; + bool useusername; + LDAP *conn; + +public: + ModuleLDAPAuth() : ldapAuthed("ldapauth", this) + { + conn = NULL; + } + + void init() + { + Implementation eventlist[] = { I_OnCheckReady, I_OnRehash, I_OnUserRegister }; + ServerInstance->Modules->Attach(eventlist, this, 3); + OnRehash(NULL); + } + + ~ModuleLDAPAuth() + { + if (conn) + ldap_unbind_ext(conn, NULL, NULL); + } + + void OnRehash(User* user) + { + ConfigReader Conf; + whitelistedcidrs.clear(); + + 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); + + 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); + } + } + + 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) + { + if (verbose) + ServerInstance->SNO->WriteToSnoMask('c', "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('c', "LDAP set protocol to v3 failed: %s", ldap_err2string(res)); + ldap_unbind_ext(conn, NULL, NULL); + conn = NULL; + return false; + } + return true; + } + + ModResult OnUserRegister(LocalUser* user) + { + if ((!allowpattern.empty()) && (InspIRCd::Match(user->nick,allowpattern))) + { + ldapAuthed.set(user,1); + return MOD_RES_PASSTHRU; + } + + for (std::vector::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 MOD_RES_DENY; + } + return MOD_RES_PASSTHRU; + } + + 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!%s@%s (No password provided)", user->nick.c_str(), user->ident.c_str(), user->host.c_str()); + return false; + } + + int res; + // bind anonymously if no bind DN and authentication are given in the config + struct berval cred; + cred.bv_val = const_cast(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) + { + 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!%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; + } + } + + LDAPMessage *msg, *entry; + std::string 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) + { + // Do a second search, based on password, if it contains a : + // That is, PASS : will work. + size_t pos = user->password.find(":"); + if (pos != std::string::npos) + { + std::string cutpassword = user->password.substr(0, pos); + res = ldap_search_ext_s(conn, base.c_str(), searchscope, cutpassword.c_str(), NULL, 0, NULL, NULL, NULL, 0, &msg); + + if (res == LDAP_SUCCESS) + { + // Trim the user: prefix, leaving just 'pass' for later password check + user->password = user->password.substr(pos + 1); + } + } + + // It may have found based on user:pass check above. + if (res != LDAP_SUCCESS) + { + if (verbose) + ServerInstance->SNO->WriteToSnoMask('c', "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)); + return false; + } + } + if (ldap_count_entries(conn, msg) > 1) + { + if (verbose) + ServerInstance->SNO->WriteToSnoMask('c', "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); + return false; + } + if ((entry = ldap_first_entry(conn, msg)) == NULL) + { + if (verbose) + ServerInstance->SNO->WriteToSnoMask('c', "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); + 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); + ldapAuthed.set(user,1); + return true; + } + else + { + if (verbose) + ServerInstance->SNO->WriteToSnoMask('c', "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); + return false; + } + } + + ModResult OnCheckReady(LocalUser* user) + { + return ldapAuthed.get(user) ? MOD_RES_PASSTHRU : MOD_RES_DENY; + } + + Version GetVersion() + { + return Version("Allow/Deny connections based upon answer from LDAP server", VF_VENDOR); + } + +}; + +MODULE_INIT(ModuleLDAPAuth)