programs/charon/charon/encoding/payloads/vendor_id_payload.c

   1 /**
   2  * @file vendor_id_payload.c
   3  *
   4  * @brief Implementation of vendor_id_payload_t.
   5  *
   6  */
   7
   8 /*
   9  * Copyright (C) 2005 Jan Hutter, Martin Willi
  10  * Hochschule fuer Technik Rapperswil
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License as published by the
  14  * Free Software Foundation; either version 2 of the License, or (at your
  15  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  19  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  20  * for more details.
  21  */
  22
  23 #include <stddef.h>
  24
  25 #include "vendor_id_payload.h"
  26
  27
  28 typedef struct private_vendor_id_payload_t private_vendor_id_payload_t;
  29
  30 /**
  31  * Private data of an vendor_id_payload_t object.
  32  *
  33  */
  34 struct private_vendor_id_payload_t {
  35         /**
  36          * Public vendor_id_payload_t interface.
  37          */
  38         vendor_id_payload_t public;
  39
  40         /**
  41          * Next payload type.
  42          */
  43         u_int8_t  next_payload;
  44
  45         /**
  46          * Critical flag.
  47          */
  48         bool critical;
  49
  50         /**
  51          * Length of this payload.
  52          */
  53         u_int16_t payload_length;
  54
  55         /**
  56          * The contained vendor_id data value.
  57          */
  58         chunk_t vendor_id_data;
  59 };
  60
  61 /**
  62  * Encoding rules to parse or generate a VENDOR ID payload
  63  *
  64  * The defined offsets are the positions in a object of type
  65  * private_vendor_id_payload_t.
  66  *
  67  */
  68 encoding_rule_t vendor_id_payload_encodings[] = {
  69         /* 1 Byte next payload type, stored in the field next_payload */
  70         { U_INT_8,                      offsetof(private_vendor_id_payload_t, next_payload) },
  71         /* the critical bit */
  72         { FLAG,                         offsetof(private_vendor_id_payload_t, critical)         },
  73         /* 7 Bit reserved bits, nowhere stored */
  74         { RESERVED_BIT, 0                                                                                                               },
  75         { RESERVED_BIT, 0                                                                                                               },
  76         { RESERVED_BIT, 0                                                                                                               },
  77         { RESERVED_BIT, 0                                                                                                               },
  78         { RESERVED_BIT, 0                                                                                                               },
  79         { RESERVED_BIT, 0                                                                                                               },
  80         { RESERVED_BIT, 0                                                                                                               },
  81         /* Length of the whole payload*/
  82         { PAYLOAD_LENGTH,       offsetof(private_vendor_id_payload_t, payload_length)},
  83         /* some vendor_id data bytes, length is defined in PAYLOAD_LENGTH */
  84         { VID_DATA,                     offsetof(private_vendor_id_payload_t, vendor_id_data) }
  85 };
  86
  87 /*
  88                            1                   2                   3
  89        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
  90       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  91       ! Next Payload  !C!  RESERVED   !         Payload Length        !
  92       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  93       ! Cert Encoding !                                               !
  94       +-+-+-+-+-+-+-+-+                                               !
  95       ~                       Certificate Data                        ~
  96       !                                                               !
  97       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  98 */
  99
 100 /**
 101  * Implementation of payload_t.verify.
 102  */
 103 static status_t verify(private_vendor_id_payload_t *this)
 104 {
 105         return SUCCESS;
 106 }
 107
 108 /**
 109  * Implementation of vendor_id_payload_t.get_encoding_rules.
 110  */
 111 static void get_encoding_rules(private_vendor_id_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
 112 {
 113         *rules = vendor_id_payload_encodings;
 114         *rule_count = sizeof(vendor_id_payload_encodings) / sizeof(encoding_rule_t);
 115 }
 116
 117 /**
 118  * Implementation of payload_t.get_type.
 119  */
 120 static payload_type_t get_payload_type(private_vendor_id_payload_t *this)
 121 {
 122         return VENDOR_ID;
 123 }
 124
 125 /**
 126  * Implementation of payload_t.get_next_type.
 127  */
 128 static payload_type_t get_next_type(private_vendor_id_payload_t *this)
 129 {
 130         return (this->next_payload);
 131 }
 132
 133 /**
 134  * Implementation of payload_t.set_next_type.
 135  */
 136 static void set_next_type(private_vendor_id_payload_t *this,payload_type_t type)
 137 {
 138         this->next_payload = type;
 139 }
 140
 141 /**
 142  * Implementation of payload_t.get_length.
 143  */
 144 static size_t get_length(private_vendor_id_payload_t *this)
 145 {
 146         return this->payload_length;
 147 }
 148
 149 /**
 150  * Implementation of vendor_id_payload_t.set_data.
 151  */
 152 static void set_data (private_vendor_id_payload_t *this, chunk_t data)
 153 {
 154         if (this->vendor_id_data.ptr != NULL)
 155         {
 156                 chunk_free(&(this->vendor_id_data));
 157         }
 158         this->vendor_id_data.ptr = clalloc(data.ptr,data.len);
 159         this->vendor_id_data.len = data.len;
 160         this->payload_length = VENDOR_ID_PAYLOAD_HEADER_LENGTH + this->vendor_id_data.len;
 161 }
 162
 163 /**
 164  * Implementation of vendor_id_payload_t.get_data.
 165  */
 166 static chunk_t get_data (private_vendor_id_payload_t *this)
 167 {
 168         return (this->vendor_id_data);
 169 }
 170
 171 /**
 172  * Implementation of vendor_id_payload_t.get_data_clone.
 173  */
 174 static chunk_t get_data_clone (private_vendor_id_payload_t *this)
 175 {
 176         chunk_t cloned_data;
 177         if (this->vendor_id_data.ptr == NULL)
 178         {
 179                 return (this->vendor_id_data);
 180         }
 181         cloned_data.ptr = clalloc(this->vendor_id_data.ptr,this->vendor_id_data.len);
 182         cloned_data.len = this->vendor_id_data.len;
 183         return cloned_data;
 184 }
 185
 186 /**
 187  * Implementation of payload_t.destroy and vendor_id_payload_t.destroy.
 188  */
 189 static void destroy(private_vendor_id_payload_t *this)
 190 {
 191         if (this->vendor_id_data.ptr != NULL)
 192         {
 193                 chunk_free(&(this->vendor_id_data));
 194         }
 195         free(this);
 196 }
 197
 198 /*
 199  * Described in header
 200  */
 201 vendor_id_payload_t *vendor_id_payload_create()
 202 {
 203         private_vendor_id_payload_t *this = malloc_thing(private_vendor_id_payload_t);
 204
 205         /* interface functions */
 206         this->public.payload_interface.verify = (status_t (*) (payload_t *))verify;
 207         this->public.payload_interface.get_encoding_rules = (void (*) (payload_t *, encoding_rule_t **, size_t *) ) get_encoding_rules;
 208         this->public.payload_interface.get_length = (size_t (*) (payload_t *)) get_length;
 209         this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t *)) get_next_type;
 210         this->public.payload_interface.set_next_type = (void (*) (payload_t *,payload_type_t)) set_next_type;
 211         this->public.payload_interface.get_type = (payload_type_t (*) (payload_t *)) get_payload_type;
 212         this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
 213
 214         /* public functions */
 215         this->public.destroy = (void (*) (vendor_id_payload_t *)) destroy;
 216         this->public.set_data = (void (*) (vendor_id_payload_t *,chunk_t)) set_data;
 217         this->public.get_data_clone = (chunk_t (*) (vendor_id_payload_t *)) get_data_clone;
 218         this->public.get_data = (chunk_t (*) (vendor_id_payload_t *)) get_data;
 219
 220         /* private variables */
 221         this->critical = FALSE;
 222         this->next_payload = NO_PAYLOAD;
 223         this->payload_length = VENDOR_ID_PAYLOAD_HEADER_LENGTH;
 224         this->vendor_id_data = CHUNK_INITIALIZER;
 225
 226         return (&(this->public));
 227 }