From 785107bf51671b6451f12e0ab35c9d15a854b866 Mon Sep 17 00:00:00 2001 From: Mike Taylor Date: Tue, 17 Jan 2006 17:13:31 +0000 Subject: [PATCH] Per-database authorisation done at search time. (Scan just lets you get on with it.) --- src/filter_auth_simple.cpp | 202 ++++++++++++++++++++++++++++++++------------ 1 file changed, 150 insertions(+), 52 deletions(-) diff --git a/src/filter_auth_simple.cpp b/src/filter_auth_simple.cpp index 03b03c5..c87cd65 100644 --- a/src/filter_auth_simple.cpp +++ b/src/filter_auth_simple.cpp @@ -1,4 +1,4 @@ -/* $Id: filter_auth_simple.cpp,v 1.3 2006-01-16 16:32:33 mike Exp $ +/* $Id: filter_auth_simple.cpp,v 1.4 2006-01-17 17:13:31 mike Exp $ Copyright (c) 2005, Index Data. %LICENSE% @@ -10,11 +10,13 @@ #include "package.hpp" #include +#include #include "util.hpp" #include "filter_auth_simple.hpp" #include +#include #include #include @@ -24,8 +26,16 @@ namespace yp2 { namespace filter { class AuthSimple::Rep { friend class AuthSimple; - typedef std::map userpass; - userpass reg; + struct PasswordAndDBs { + std::string password; + std::list dbs; + PasswordAndDBs() {}; + PasswordAndDBs(std::string pw) : password(pw) {}; + void addDB(std::string db) { dbs.push_back(db); } + }; + boost::mutex mutex; + std::map userRegister; + std::map userBySession; }; } } @@ -40,46 +50,6 @@ yf::AuthSimple::~AuthSimple() } -void reject(yp2::Package &package, const char *addinfo) { - // Make an Init rejection APDU - Z_GDU *gdu = package.request().get(); - yp2::odr odr; - Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 1014, addinfo); - apdu->u.initResponse->implementationName = "YP2/YAZ"; - *apdu->u.initResponse->result = 0; // reject - package.response() = apdu; - package.session().close(); -} - - -void yf::AuthSimple::process(yp2::Package &package) const -{ - Z_GDU *gdu = package.request().get(); - - if (!gdu || gdu->which != Z_GDU_Z3950 || - gdu->u.z3950->which != Z_APDU_initRequest) { - // pass on package -- I think that means authentication is - // accepted which may not be the correct thing for non-Z APDUs - // as it means that SRW sessions don't demand authentication - return package.move(); - } - - Z_IdAuthentication *auth = gdu->u.z3950->u.initRequest->idAuthentication; - if (!auth) - return reject(package, "no credentials supplied"); - if (auth->which != Z_IdAuthentication_idPass) - return reject(package, "only idPass authentication is supported"); - Z_IdPass *idPass = auth->u.idPass; - // groupId is ignored, in accordance with ancient tradition - if (m_p->reg[idPass->userId] == idPass->password) { - // Success! Should the authentication information now be - // altered or deleted? That could be configurable. - return package.move(); - } - return reject(package, "username/password combination rejected"); -} - - // Read XML config.. Put config info in m_p. void yp2::filter::AuthSimple::configure(const xmlNode * ptr) { @@ -93,9 +63,9 @@ void yp2::filter::AuthSimple::configure(const xmlNode * ptr) filename = yp2::xml::get_text(ptr); got_filename = true; } else { - throw yp2::filter::FilterException("Bad element in auth_simple: " + throw yp2::filter::FilterException("Bad element in auth_simple: <" + std::string((const char *) - ptr->name)); + ptr->name) + ">"); } } @@ -114,17 +84,145 @@ void yp2::filter::AuthSimple::configure(const xmlNode * ptr) if (*buf == '\n' || *buf == '#') continue; buf[strlen(buf)-1] = 0; - char *cp = strchr(buf, ':'); - if (cp == 0) + char *passwdp = strchr(buf, ':'); + if (passwdp == 0) + throw yp2::filter::FilterException("auth_simple user-register '" + + filename + "': " + + "no password on line: '" + + buf + "'"); + *passwdp++ = 0; + char *databasesp = strchr(passwdp, ':'); + if (databasesp == 0) throw yp2::filter::FilterException("auth_simple user-register '" + - filename + "': bad line: " + - buf); - *cp++ = 0; - m_p->reg[buf] = cp; - //printf("Added user '%s' -> password '%s'\n", buf, cp); + filename + "': " + + "no databases on line: '" + + buf + ":" + passwdp + "'"); + *databasesp++ = 0; + yf::AuthSimple::Rep::PasswordAndDBs tmp(passwdp); + boost::split(tmp.dbs, databasesp, boost::is_any_of(",")); + m_p->userRegister[buf] = tmp; + + if (1) { // debugging + printf("Added user '%s' -> password '%s'\n", buf, passwdp); + std::list::const_iterator i; + for (i = tmp.dbs.begin(); i != tmp.dbs.end(); i++) { + printf("db '%s'\n", (*i).c_str()); + } + } + } +} + + +void yf::AuthSimple::process(yp2::Package &package) const +{ + Z_GDU *gdu = package.request().get(); + + if (!gdu || gdu->which != Z_GDU_Z3950) { + // Pass on the package -- This means that authentication is + // waived, which may not be the correct thing for non-Z APDUs + // as it means that SRW sessions don't demand authentication + return package.move(); + } + + switch (gdu->u.z3950->which) { + case Z_APDU_initRequest: return process_init(package); + case Z_APDU_searchRequest: return process_search(package); + default: break; + } + + // Operations other than those listed above do not require authorisation + return package.move(); +} + + +static void reject_init(yp2::Package &package, const char *addinfo); + + +void yf::AuthSimple::process_init(yp2::Package &package) const +{ + Z_IdAuthentication *auth = + package.request().get()->u.z3950->u.initRequest->idAuthentication; + // This is just plain perverted. + + if (!auth) + return reject_init(package, "no credentials supplied"); + if (auth->which != Z_IdAuthentication_idPass) + return reject_init(package, "only idPass authentication is supported"); + Z_IdPass *idPass = auth->u.idPass; + + if (m_p->userRegister.count(idPass->userId)) { + // groupId is ignored, in accordance with ancient tradition. + yf::AuthSimple::Rep::PasswordAndDBs pdbs = + m_p->userRegister[idPass->userId]; + if (pdbs.password == idPass->password) { + // Success! Remember who the user is for future reference + { + boost::mutex::scoped_lock lock(m_p->mutex); + m_p->userBySession[package.session()] = idPass->userId; + } + return package.move(); + } + } + + return reject_init(package, "username/password combination rejected"); +} + + +// I find it unutterable disappointing that I have to provide this +static bool contains(std::list list, std::string thing) { + std::list::const_iterator i; + for (i = list.begin(); i != list.end(); i++) + if (*i == thing) + return true; + + return false; +} + + +void yf::AuthSimple::process_search(yp2::Package &package) const +{ + Z_SearchRequest *req = + package.request().get()->u.z3950->u.searchRequest; + + if (m_p->userBySession.count(package.session()) == 0) { + // It's a non-authenticated session, so just accept the operation + return package.move(); } + + std::string user = m_p->userBySession[package.session()]; + yf::AuthSimple::Rep::PasswordAndDBs pdb = m_p->userRegister[user]; + for (int i = 0; i < req->num_databaseNames; i++) { + if (!contains(pdb.dbs, req->databaseNames[i])) { + // Make an Search rejection APDU + yp2::odr odr; + Z_APDU *apdu = odr.create_searchResponse( + package.request().get()->u.z3950, + YAZ_BIB1_ACCESS_TO_SPECIFIED_DATABASE_DENIED, + req->databaseNames[i]); + package.response() = apdu; + package.session().close(); + return; + } + } + + // All the requested databases are acceptable + return package.move(); +} + + +static void reject_init(yp2::Package &package, const char *addinfo) { + // Make an Init rejection APDU + Z_GDU *gdu = package.request().get(); + yp2::odr odr; + Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, + YAZ_BIB1_INIT_AC_AUTHENTICATION_SYSTEM_ERROR, addinfo); + apdu->u.initResponse->implementationName = "YP2/YAZ"; + *apdu->u.initResponse->result = 0; // reject + package.response() = apdu; + package.session().close(); } + static yp2::filter::Base* filter_creator() { return new yp2::filter::AuthSimple; -- 1.7.10.4