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 37 namespace zmq 38 { 39 class msg_t; 40 class session_base_t; 41 42 class gssapi_client_t ZMQ_FINAL : public gssapi_mechanism_base_t 43 { 44 public: 45 gssapi_client_t (session_base_t *session_, const options_t &options_); 46 ~gssapi_client_t () ZMQ_FINAL; 47 48 // mechanism implementation 49 int next_handshake_command (msg_t *msg_) ZMQ_FINAL; 50 int process_handshake_command (msg_t *msg_) ZMQ_FINAL; 51 int encode (msg_t *msg_) ZMQ_FINAL; 52 int decode (msg_t *msg_) ZMQ_FINAL; 53 status_t status () const ZMQ_FINAL; 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