diff options
Diffstat (limited to 'src/modules/extra/m_ldapauth.cpp')
| -rw-r--r-- | src/modules/extra/m_ldapauth.cpp | 436 |
1 files changed, 0 insertions, 436 deletions
diff --git a/src/modules/extra/m_ldapauth.cpp b/src/modules/extra/m_ldapauth.cpp deleted file mode 100644 index 6c765fb2e..000000000 --- a/src/modules/extra/m_ldapauth.cpp +++ /dev/null @@ -1,436 +0,0 @@ -/* - * InspIRCd -- Internet Relay Chat Daemon - * - * 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 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 <http://www.gnu.org/licenses/>. - */ - - -#include "inspircd.h" -#include "users.h" -#include "channels.h" -#include "modules.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 allowpattern; - 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() - : ldapAuthed("ldapauth", this) - , ldapVhost("ldapauth_vhost", this) - { - conn = NULL; - } - - 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); - } - - 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(); - } - - 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; - } - - std::string SafeReplace(const std::string &text, std::map<std::string, - std::string> &replacements) - { - 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->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 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 (No password provided)", user->GetFullRealHost().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<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) - { - 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; - } - } - - RAIILDAPMessage msg; - 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 <user>:<password> will work. - size_t pos = user->password.find(":"); - if (pos != std::string::npos) - { - // manpage says we must deallocate regardless of success or failure - // since we're about to do another query (and reset msg), first - // free the old one. - msg.dealloc(); - - 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 (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('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('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(); - 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('c', "Forbidden connection from %s (%s)", user->GetFullRealHost().c_str(), ldap_err2string(res)); - return false; - } - - 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)) - { - std::string::size_type 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; - } - - 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) |