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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) 2018 SUSE LLC.
* Author: Daniel Oliveira <doliveira@suse.com>
*
* 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 "KrbServiceHandler.hpp"
#include "KrbProtocol.hpp"
#include <errno.h>
#include <sstream>
#include "common/config.h"
#include "common/debug.h"
#define dout_subsys ceph_subsys_auth
#undef dout_prefix
#define dout_prefix *_dout << "krb5/gssapi service: " << entity_name << " : "
int KrbServiceHandler::handle_request(
bufferlist::const_iterator& indata,
size_t connection_secret_required_length,
bufferlist *buff_list,
AuthCapsInfo *caps,
CryptoKey *session_key,
std::string *connection_secret)
{
auto result(0);
gss_buffer_desc gss_buffer_in = {0, nullptr};
gss_name_t gss_client_name = GSS_C_NO_NAME;
gss_OID gss_object_id = {0};
OM_uint32 gss_major_status(0);
OM_uint32 gss_minor_status(0);
OM_uint32 gss_result_flags(0);
std::string status_str(" ");
ldout(cct, 20)
<< "KrbServiceHandler::handle_request() " << dendl;
KrbRequest krb_request;
KrbTokenBlob krb_token;
using ceph::decode;
decode(krb_request, indata);
decode(krb_token, indata);
gss_buffer_in.length = krb_token.m_token_blob.length();
gss_buffer_in.value = krb_token.m_token_blob.c_str();
ldout(cct, 20)
<< "KrbClientHandler::handle_request() : Token Blob: "
<< "\n";
krb_token.m_token_blob.hexdump(*_dout);
*_dout << dendl;
if (m_gss_buffer_out.length != 0) {
gss_release_buffer(&gss_minor_status,
static_cast<gss_buffer_t>(&m_gss_buffer_out));
}
gss_major_status = gss_accept_sec_context(&gss_minor_status,
&m_gss_sec_ctx,
m_gss_credentials,
&gss_buffer_in,
GSS_C_NO_CHANNEL_BINDINGS,
&gss_client_name,
&gss_object_id,
&m_gss_buffer_out,
&gss_result_flags,
nullptr,
nullptr);
switch (gss_major_status) {
case GSS_S_CONTINUE_NEEDED:
{
ldout(cct, 20)
<< "KrbServiceHandler::handle_response() : "
"[KrbServiceHandler(GSS_S_CONTINUE_NEEDED)] " << dendl;
result = 0;
break;
}
case GSS_S_COMPLETE:
{
result = 0;
ldout(cct, 20)
<< "KrbServiceHandler::handle_response() : "
"[KrbServiceHandler(GSS_S_COMPLETE)] " << dendl;
if (!m_key_server->get_service_caps(entity_name,
CEPH_ENTITY_TYPE_MON,
*caps)) {
result = (-EACCES);
ldout(cct, 0)
<< "KrbServiceHandler::handle_response() : "
"ERROR: Could not get MONITOR CAPS : " << entity_name << dendl;
} else {
if (!caps->caps.c_str()) {
result = (-EACCES);
ldout(cct, 0)
<< "KrbServiceHandler::handle_response() : "
"ERROR: MONITOR CAPS invalid : " << entity_name << dendl;
}
}
break;
}
default:
{
status_str = gss_auth_show_status(gss_major_status,
gss_minor_status);
ldout(cct, 0)
<< "ERROR: KrbServiceHandler::handle_response() "
"[gss_accept_sec_context()] failed! "
<< gss_major_status << " "
<< gss_minor_status << " "
<< status_str
<< dendl;
result = (-EACCES);
break;
}
}
if (m_gss_buffer_out.length != 0) {
KrbResponse krb_response;
KrbTokenBlob krb_token;
krb_response.m_response_type =
static_cast<int>(GSSAuthenticationRequest::GSS_TOKEN);
using ceph::encode;
encode(krb_response, *buff_list);
krb_token.m_token_blob.append(buffer::create_static(
m_gss_buffer_out.length,
reinterpret_cast<char*>
(m_gss_buffer_out.value)));
encode(krb_token, *buff_list);
ldout(cct, 20)
<< "KrbServiceHandler::handle_request() : Token Blob: " << "\n";
krb_token.m_token_blob.hexdump(*_dout);
*_dout << dendl;
}
gss_release_name(&gss_minor_status, &gss_client_name);
return result;
}
int KrbServiceHandler::do_start_session(
bool is_new_global_id,
bufferlist *buff_list,
AuthCapsInfo *caps)
{
gss_buffer_desc gss_buffer_in = {0, nullptr};
gss_OID gss_object_id = GSS_C_NT_HOSTBASED_SERVICE;
gss_OID_set gss_mechs_wanted = GSS_C_NO_OID_SET;
OM_uint32 gss_major_status(0);
OM_uint32 gss_minor_status(0);
std::string gss_service_name(cct->_conf.get_val<std::string>
("gss_target_name"));
gss_buffer_in.length = gss_service_name.length();
gss_buffer_in.value = (const_cast<char*>(gss_service_name.c_str()));
gss_major_status = gss_import_name(&gss_minor_status,
&gss_buffer_in,
gss_object_id,
&m_gss_service_name);
if (gss_major_status != GSS_S_COMPLETE) {
auto status_str(gss_auth_show_status(gss_major_status,
gss_minor_status));
ldout(cct, 0)
<< "ERROR: KrbServiceHandler::start_session() "
"[gss_import_name(gss_client_name)] failed! "
<< gss_major_status << " "
<< gss_minor_status << " "
<< status_str
<< dendl;
}
gss_major_status = gss_acquire_cred(&gss_minor_status,
m_gss_service_name,
0,
gss_mechs_wanted,
GSS_C_ACCEPT,
&m_gss_credentials,
nullptr,
nullptr);
if (gss_major_status != GSS_S_COMPLETE) {
auto status_str(gss_auth_show_status(gss_major_status,
gss_minor_status));
ldout(cct, 0)
<< "ERROR: KrbServiceHandler::start_session() "
"[gss_acquire_cred()] failed! "
<< gss_major_status << " "
<< gss_minor_status << " "
<< status_str
<< dendl;
return (-EACCES);
} else {
KrbResponse krb_response;
krb_response.m_response_type =
static_cast<int>(GSSAuthenticationRequest::GSS_MUTUAL);
using ceph::encode;
encode(krb_response, *buff_list);
return (CEPH_AUTH_GSS);
}
}
KrbServiceHandler::~KrbServiceHandler()
{
OM_uint32 gss_minor_status(0);
gss_release_name(&gss_minor_status, &m_gss_service_name);
gss_release_cred(&gss_minor_status, &m_gss_credentials);
gss_delete_sec_context(&gss_minor_status, &m_gss_sec_ctx, GSS_C_NO_BUFFER);
gss_release_buffer(&gss_minor_status, static_cast<gss_buffer_t>(&m_gss_buffer_out));
}
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