1/*
2 Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
3
4 This file is part of libzmq, the ZeroMQ core engine in C++.
5
6 libzmq is free software; you can redistribute it and/or modify it under
7 the terms of the GNU Lesser General Public License (LGPL) as published
8 by the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 As a special exception, the Contributors give you permission to link
12 this library with independent modules to produce an executable,
13 regardless of the license terms of these independent modules, and to
14 copy and distribute the resulting executable under terms of your choice,
15 provided that you also meet, for each linked independent module, the
16 terms and conditions of the license of that module. An independent
17 module is a module which is not derived from or based on this library.
18 If you modify this library, you must extend this exception to your
19 version of the library.
20
21 libzmq is distributed in the hope that it will be useful, but WITHOUT
22 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
23 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
24 License for more details.
25
26 You should have received a copy of the GNU Lesser General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>.
28*/
29
30#ifndef __ZMQ_GSSAPI_CLIENT_HPP_INCLUDED__
31#define __ZMQ_GSSAPI_CLIENT_HPP_INCLUDED__
32
33#ifdef HAVE_LIBGSSAPI_KRB5
34
35#include "gssapi_mechanism_base.hpp"
36
37namespace zmq
38{
39class msg_t;
40class session_base_t;
41
42class gssapi_client_t : public gssapi_mechanism_base_t
43{
44 public:
45 gssapi_client_t (session_base_t *session_, const options_t &options_);
46 virtual ~gssapi_client_t ();
47
48 // mechanism implementation
49 virtual int next_handshake_command (msg_t *msg_);
50 virtual int process_handshake_command (msg_t *msg_);
51 virtual int encode (msg_t *msg_);
52 virtual int decode (msg_t *msg_);
53 virtual status_t status () const;
54
55 private:
56 enum state_t
57 {
58 call_next_init,
59 send_next_token,
60 recv_next_token,
61 send_ready,
62 recv_ready,
63 connected
64 };
65
66 // Human-readable principal name of the service we are connecting to
67 char *service_name;
68
69 gss_OID service_name_type;
70
71 // Current FSM state
72 state_t state;
73
74 // Points to either send_tok or recv_tok
75 // during context initialization
76 gss_buffer_desc *token_ptr;
77
78 // The desired underlying mechanism
79 gss_OID_set_desc mechs;
80
81 // True iff client considers the server authenticated
82 bool security_context_established;
83
84 int initialize_context ();
85 int produce_next_token (msg_t *msg_);
86 int process_next_token (msg_t *msg_);
87};
88}
89
90#endif
91
92#endif
93