src/libcharon/sa/ikev2/tasks/ike_vendor.c

   1 /*
   2  * Copyright (C) 2009 Martin Willi
   3  * Hochschule fuer Technik Rapperswil
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #include "ike_vendor.h"
  17
  18 #include <daemon.h>
  19 #include <encoding/payloads/vendor_id_payload.h>
  20
  21 typedef struct private_ike_vendor_t private_ike_vendor_t;
  22
  23 /**
  24  * Private data of an ike_vendor_t object.
  25  */
  26 struct private_ike_vendor_t {
  27
  28         /**
  29          * Public ike_vendor_t interface.
  30          */
  31         ike_vendor_t public;
  32
  33         /**
  34          * Associated IKE_SA
  35          */
  36         ike_sa_t *ike_sa;
  37
  38         /**
  39          * Are we the inititator of this task
  40          */
  41         bool initiator;
  42 };
  43
  44 /**
  45  * Vendor ID database entry
  46  */
  47 typedef struct {
  48         /* Description */
  49         char *desc;
  50         /* extension flag negotiated with vendor ID, if any */
  51         ike_extension_t extension;
  52         /* length of vendor ID string, 0 for NULL terminated */
  53         int len;
  54         /* vendor ID string */
  55         char *id;
  56 } vid_data_t;
  57
  58 /**
  59  * Get the data of a vendor ID as a chunk
  60  */
  61 static chunk_t get_vid_data(vid_data_t *data)
  62 {
  63         return chunk_create(data->id, data->len ?: strlen(data->id));
  64 }
  65
  66 /**
  67  * IKEv2 Vendor ID database entry
  68  */
  69 static vid_data_t vids[] = {
  70         /* strongSwan MD5("strongSwan") */
  71         { "strongSwan", EXT_STRONGSWAN, 16,
  72           "\x88\x2f\xe5\x6d\x6f\xd2\x0d\xbc\x22\x51\x61\x3b\x2e\xbe\x5b\xeb"},
  73         { "Cisco Delete Reason", 0, 0,
  74           "CISCO-DELETE-REASON" },
  75         { "Cisco Copyright (c) 2009", 0, 0,
  76           "CISCO(COPYRIGHT)&Copyright (c) 2009 Cisco Systems, Inc." },
  77 };
  78
  79 METHOD(task_t, build, status_t,
  80         private_ike_vendor_t *this, message_t *message)
  81 {
  82         vendor_id_payload_t *vid;
  83         bool strongswan;
  84         int i;
  85
  86         strongswan = lib->settings->get_bool(lib->settings,
  87                                                         "%s.send_vendor_id", FALSE, charon->name);
  88         for (i = 0; i < countof(vids); i++)
  89         {
  90                 if (vids[i].extension == EXT_STRONGSWAN && strongswan)
  91                 {
  92                         DBG2(DBG_IKE, "sending %s vendor ID", vids[i].desc);
  93                         vid = vendor_id_payload_create_data(VENDOR_ID,
  94                                                                                 chunk_clone(get_vid_data(&vids[i])));
  95                         message->add_payload(message, &vid->payload_interface);
  96                 }
  97         }
  98
  99         return this->initiator ? NEED_MORE : SUCCESS;
 100 }
 101
 102 METHOD(task_t, process, status_t,
 103         private_ike_vendor_t *this, message_t *message)
 104 {
 105         enumerator_t *enumerator;
 106         payload_t *payload;
 107         int i;
 108
 109         enumerator = message->create_payload_enumerator(message);
 110         while (enumerator->enumerate(enumerator, &payload))
 111         {
 112                 if (payload->get_type(payload) == VENDOR_ID)
 113                 {
 114                         vendor_id_payload_t *vid;
 115                         chunk_t data;
 116                         bool found = FALSE;
 117
 118                         vid = (vendor_id_payload_t*)payload;
 119                         data = vid->get_data(vid);
 120
 121                         for (i = 0; i < countof(vids); i++)
 122                         {
 123                                 if (chunk_equals(get_vid_data(&vids[i]), data))
 124                                 {
 125                                         DBG1(DBG_IKE, "received %s vendor ID", vids[i].desc);
 126                                         if (vids[i].extension)
 127                                         {
 128                                                 this->ike_sa->enable_extension(this->ike_sa,
 129                                                                                                            vids[i].extension);
 130                                         }
 131                                         found = TRUE;
 132                                         break;
 133                                 }
 134                         }
 135                         if (!found)
 136                         {
 137                                 DBG1(DBG_ENC, "received unknown vendor ID: %#B", &data);
 138                         }
 139                 }
 140         }
 141         enumerator->destroy(enumerator);
 142
 143         return this->initiator ? SUCCESS : NEED_MORE;
 144 }
 145
 146 METHOD(task_t, migrate, void,
 147         private_ike_vendor_t *this, ike_sa_t *ike_sa)
 148 {
 149         this->ike_sa = ike_sa;
 150 }
 151
 152 METHOD(task_t, get_type, task_type_t,
 153         private_ike_vendor_t *this)
 154 {
 155         return TASK_IKE_VENDOR;
 156 }
 157
 158 METHOD(task_t, destroy, void,
 159         private_ike_vendor_t *this)
 160 {
 161         free(this);
 162 }
 163
 164 /**
 165  * See header
 166  */
 167 ike_vendor_t *ike_vendor_create(ike_sa_t *ike_sa, bool initiator)
 168 {
 169         private_ike_vendor_t *this;
 170
 171         INIT(this,
 172                 .public = {
 173                         .task = {
 174                                 .build = _build,
 175                                 .process = _process,
 176                                 .migrate = _migrate,
 177                                 .get_type = _get_type,
 178                                 .destroy = _destroy,
 179                         },
 180                 },
 181                 .initiator = initiator,
 182                 .ike_sa = ike_sa,
 183         );
 184
 185         return &this->public;
 186 }