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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 "KrbClientHandler.hpp"
#include <errno.h>
#include <string>
#include "KrbProtocol.hpp"
#include "auth/KeyRing.h"
#include "include/random.h"
#include "common/ceph_context.h"
#include "common/config.h"
#include "common/dout.h"
#define dout_subsys ceph_subsys_auth
#undef dout_prefix
#define dout_prefix *_dout << "krb5/gssapi client request: "
struct AuthAuthorizer;
AuthAuthorizer*
KrbClientHandler::build_authorizer(uint32_t service_id) const
{
ldout(cct, 20)
<< "KrbClientHandler::build_authorizer(): Service: "
<< ceph_entity_type_name(service_id) << dendl;
KrbAuthorizer* krb_auth = new KrbAuthorizer();
if (krb_auth) {
krb_auth->build_authorizer(cct->_conf->name, global_id);
}
return krb_auth;
}
KrbClientHandler::~KrbClientHandler()
{
OM_uint32 gss_minor_status(0);
gss_release_name(&gss_minor_status, &m_gss_client_name);
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));
}
int KrbClientHandler::build_request(bufferlist& buff_list) const
{
ldout(cct, 20)
<< "KrbClientHandler::build_request() " << dendl;
KrbTokenBlob krb_token;
KrbRequest krb_request;
krb_request.m_request_type =
static_cast<int>(GSSAuthenticationRequest::GSS_TOKEN);
using ceph::encode;
encode(krb_request, buff_list);
if (m_gss_buffer_out.length != 0) {
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)
<< "KrbClientHandler::build_request() : Token Blob: " << "\n";
krb_token.m_token_blob.hexdump(*_dout);
*_dout << dendl;
}
return 0;
}
int KrbClientHandler::handle_response(
int ret,
bufferlist::const_iterator& buff_list,
CryptoKey *session_key,
std::string *connection_secret)
{
auto result(ret);
gss_buffer_desc gss_buffer_in = {0, nullptr};
gss_OID_set_desc gss_mechs_wanted = {0, nullptr};
OM_uint32 gss_major_status(0);
OM_uint32 gss_minor_status(0);
OM_uint32 gss_wanted_flags(GSS_C_MUTUAL_FLAG |
GSS_C_INTEG_FLAG);
OM_uint32 gss_result_flags(0);
ldout(cct, 20)
<< "KrbClientHandler::handle_response() " << dendl;
if (result < 0) {
return result;
}
gss_mechs_wanted.elements = const_cast<gss_OID>(&GSS_API_SPNEGO_OID_PTR);
gss_mechs_wanted.count = 1;
KrbResponse krb_response;
using ceph::decode;
decode(krb_response, buff_list);
if (m_gss_credentials == GSS_C_NO_CREDENTIAL) {
gss_OID krb_client_type = GSS_C_NT_USER_NAME;
std::string krb_client_name(cct->_conf->name.to_str());
gss_buffer_in.length = krb_client_name.length();
gss_buffer_in.value = (const_cast<char*>(krb_client_name.c_str()));
if (cct->_conf->name.get_type() == CEPH_ENTITY_TYPE_CLIENT) {
gss_major_status = gss_import_name(&gss_minor_status,
&gss_buffer_in,
krb_client_type,
&m_gss_client_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: KrbClientHandler::handle_response() "
"[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_client_name,
0,
&gss_mechs_wanted,
GSS_C_INITIATE,
&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, 20)
<< "ERROR: KrbClientHandler::handle_response() "
"[gss_acquire_cred()] failed! "
<< gss_major_status << " "
<< gss_minor_status << " "
<< status_str
<< dendl;
return (-EACCES);
}
gss_buffer_desc krb_input_name_buff = {0, nullptr};
gss_OID krb_input_type = GSS_C_NT_HOSTBASED_SERVICE;
std::string gss_target_name(cct->_conf.get_val<std::string>
("gss_target_name"));
krb_input_name_buff.length = gss_target_name.length();
krb_input_name_buff.value = (const_cast<char*>(gss_target_name.c_str()));
gss_major_status = gss_import_name(&gss_minor_status,
&krb_input_name_buff,
krb_input_type,
&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: KrbClientHandler::handle_response() "
"[gss_import_name(gss_service_name)] failed! "
<< gss_major_status << " "
<< gss_minor_status << " "
<< status_str
<< dendl;
}
} else {
KrbTokenBlob krb_token;
using ceph::decode;
decode(krb_token, buff_list);
ldout(cct, 20)
<< "KrbClientHandler::handle_response() : Token Blob: " << "\n";
krb_token.m_token_blob.hexdump(*_dout);
*_dout << dendl;
gss_buffer_in.length = krb_token.m_token_blob.length();
gss_buffer_in.value = krb_token.m_token_blob.c_str();
}
const gss_OID gss_mech_type = gss_mechs_wanted.elements;
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_init_sec_context(&gss_minor_status,
m_gss_credentials,
&m_gss_sec_ctx,
m_gss_service_name,
gss_mech_type,
gss_wanted_flags,
0,
nullptr,
&gss_buffer_in,
nullptr,
&m_gss_buffer_out,
&gss_result_flags,
nullptr);
switch (gss_major_status) {
case GSS_S_CONTINUE_NEEDED:
ldout(cct, 20)
<< "KrbClientHandler::handle_response() : "
"[gss_init_sec_context(GSS_S_CONTINUE_NEEDED)] " << dendl;
result = (-EAGAIN);
break;
case GSS_S_COMPLETE:
ldout(cct, 20)
<< "KrbClientHandler::handle_response() : "
"[gss_init_sec_context(GSS_S_COMPLETE)] " << dendl;
result = 0;
break;
default:
auto status_str(gss_auth_show_status(gss_major_status,
gss_minor_status));
ldout(cct, 0)
<< "ERROR: KrbClientHandler::handle_response() "
"[gss_init_sec_context()] failed! "
<< gss_major_status << " "
<< gss_minor_status << " "
<< status_str
<< dendl;
result = (-EACCES);
break;
}
return result;
}
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