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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2009 Sage Weil <sage@newdream.net>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <errno.h>
#include <sstream>
#include "include/assert.h"
#include "common/config.h"
#include "mon/Monitor.h"
#include "CephxProtocol.h"
#include "CephxServiceHandler.h"
#define dout_subsys ceph_subsys_auth
#undef dout_prefix
#define dout_prefix *_dout << "cephx server " << entity_name << ": "
int CephxServiceHandler::start_session(EntityName& name, bufferlist::iterator& indata, bufferlist& result_bl, AuthCapsInfo& caps)
{
entity_name = name;
get_random_bytes((char *)&server_challenge, sizeof(server_challenge));
if (!server_challenge)
server_challenge = 1; // always non-zero.
ldout(cct, 10) << "start_session server_challenge " << hex << server_challenge << dec << dendl;
CephXServerChallenge ch;
ch.server_challenge = server_challenge;
::encode(ch, result_bl);
return CEPH_AUTH_CEPHX;
}
int CephxServiceHandler::handle_request(bufferlist::iterator& indata, bufferlist& result_bl, uint64_t& global_id, AuthCapsInfo& caps, uint64_t *auid)
{
int ret = 0;
struct CephXRequestHeader cephx_header;
::decode(cephx_header, indata);
switch (cephx_header.request_type) {
case CEPHX_GET_AUTH_SESSION_KEY:
{
ldout(cct, 10) << "handle_request get_auth_session_key for " << entity_name << dendl;
CephXAuthenticate req;
::decode(req, indata);
CryptoKey secret;
if (!key_server->get_secret(entity_name, secret)) {
ldout(cct, 0) << "couldn't find entity name: " << entity_name << dendl;
ret = -EPERM;
break;
}
if (!server_challenge) {
ret = -EPERM;
break;
}
uint64_t expected_key;
std::string error;
cephx_calc_client_server_challenge(cct, secret, server_challenge,
req.client_challenge, &expected_key, error);
if (!error.empty()) {
ldout(cct, 0) << " cephx_calc_client_server_challenge error: " << error << dendl;
ret = -EPERM;
break;
}
ldout(cct, 20) << " checking key: req.key=" << hex << req.key
<< " expected_key=" << expected_key << dec << dendl;
if (req.key != expected_key) {
ldout(cct, 0) << " unexpected key: req.key=" << hex << req.key
<< " expected_key=" << expected_key << dec << dendl;
ret = -EPERM;
break;
}
CryptoKey session_key;
CephXSessionAuthInfo info;
bool should_enc_ticket = false;
EntityAuth eauth;
if (key_server->get_auth(entity_name, eauth) < 0) {
ret = -EPERM;
break;
}
CephXServiceTicketInfo old_ticket_info;
if (cephx_decode_ticket(cct, key_server, CEPH_ENTITY_TYPE_AUTH,
req.old_ticket, old_ticket_info)) {
global_id = old_ticket_info.ticket.global_id;
ldout(cct, 10) << "decoded old_ticket with global_id=" << global_id << dendl;
should_enc_ticket = true;
}
info.ticket.init_timestamps(ceph_clock_now(cct), cct->_conf->auth_mon_ticket_ttl);
info.ticket.name = entity_name;
info.ticket.global_id = global_id;
info.ticket.auid = eauth.auid;
info.validity += cct->_conf->auth_mon_ticket_ttl;
if (auid) *auid = eauth.auid;
key_server->generate_secret(session_key);
info.session_key = session_key;
info.service_id = CEPH_ENTITY_TYPE_AUTH;
if (!key_server->get_service_secret(CEPH_ENTITY_TYPE_AUTH, info.service_secret, info.secret_id)) {
ldout(cct, 0) << " could not get service secret for auth subsystem" << dendl;
ret = -EIO;
break;
}
vector<CephXSessionAuthInfo> info_vec;
info_vec.push_back(info);
build_cephx_response_header(cephx_header.request_type, 0, result_bl);
if (!cephx_build_service_ticket_reply(cct, eauth.key, info_vec, should_enc_ticket,
old_ticket_info.session_key, result_bl)) {
ret = -EIO;
}
if (!key_server->get_service_caps(entity_name, CEPH_ENTITY_TYPE_MON, caps)) {
ldout(cct, 0) << " could not get mon caps for " << entity_name << dendl;
}
}
break;
case CEPHX_GET_PRINCIPAL_SESSION_KEY:
{
ldout(cct, 10) << "handle_request get_principal_session_key" << dendl;
bufferlist tmp_bl;
CephXServiceTicketInfo auth_ticket_info;
if (!cephx_verify_authorizer(cct, key_server, indata, auth_ticket_info, tmp_bl)) {
ret = -EPERM;
break;
}
CephXServiceTicketRequest ticket_req;
::decode(ticket_req, indata);
ldout(cct, 10) << " ticket_req.keys = " << ticket_req.keys << dendl;
ret = 0;
vector<CephXSessionAuthInfo> info_vec;
for (uint32_t service_id = 1; service_id <= ticket_req.keys; service_id <<= 1) {
if (ticket_req.keys & service_id) {
ldout(cct, 10) << " adding key for service " << ceph_entity_type_name(service_id) << dendl;
CephXSessionAuthInfo info;
int r = key_server->build_session_auth_info(service_id, auth_ticket_info, info);
if (r < 0) {
ret = r;
break;
}
info.validity += cct->_conf->auth_service_ticket_ttl;
info_vec.push_back(info);
}
}
CryptoKey no_key;
build_cephx_response_header(cephx_header.request_type, ret, result_bl);
cephx_build_service_ticket_reply(cct, auth_ticket_info.session_key, info_vec, false, no_key, result_bl);
}
break;
case CEPHX_GET_ROTATING_KEY:
{
ldout(cct, 10) << "handle_request getting rotating secret for " << entity_name << dendl;
build_cephx_response_header(cephx_header.request_type, 0, result_bl);
key_server->get_rotating_encrypted(entity_name, result_bl);
ret = 0;
}
break;
default:
ldout(cct, 10) << "handle_request unknown op " << cephx_header.request_type << dendl;
return -EINVAL;
}
return ret;
}
void CephxServiceHandler::build_cephx_response_header(int request_type, int status, bufferlist& bl)
{
struct CephXResponseHeader header;
header.request_type = request_type;
header.status = status;
::encode(header, bl);
}
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