src/libimcv/tcg/tcg_pts_attr_req_funct_comp_evid.c

   1 /*
   2  * Copyright (C) 2011 Sansar Choinyambuu
   3  * HSR 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 "tcg_pts_attr_req_funct_comp_evid.h"
  17
  18 #include <pa_tnc/pa_tnc_msg.h>
  19 #include <bio/bio_writer.h>
  20 #include <bio/bio_reader.h>
  21 #include <debug.h>
  22
  23 typedef struct private_tcg_pts_attr_req_funct_comp_evid_t private_tcg_pts_attr_req_funct_comp_evid_t;
  24
  25 /**
  26  * Request Functional Component Evidence (see section 3.14.1 of PTS Protocol: Binding to TNC IF-M Specification)
  27  *
  28  *                       1                   2                   3
  29  *   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
  30  *
  31  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  32  *  |     Flags     |             Sub-component Depth               |
  33  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  34  *  |                    Component Functional Name                  |
  35  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  36  *
  37  */
  38
  39 /**
  40  * Component Functional Name Structure (see section 5.1 of PTS Protocol: Binding to TNC IF-M Specification)
  41  *
  42  *                       1                   2                   3
  43  *   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
  44  *
  45  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  46  *  |     Component Functional Name Vendor ID       |Fam| Qualifier |
  47  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  48  *  |                    Component Functional Name                  |
  49  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  50  *
  51  */
  52
  53 #define PTS_REQ_FUNCT_COMP_EVID_SIZE            12
  54 #define PTS_REQ_FUNCT_COMP_EVID_RESERVED        0x00
  55
  56 /**
  57  * Private data of an tcg_pts_attr_req_funct_comp_evid_t object.
  58  */
  59 struct private_tcg_pts_attr_req_funct_comp_evid_t {
  60
  61         /**
  62          * Public members of tcg_pts_attr_req_funct_comp_evid_t
  63          */
  64         tcg_pts_attr_req_funct_comp_evid_t public;
  65
  66         /**
  67          * Attribute vendor ID
  68          */
  69         pen_t vendor_id;
  70
  71         /**
  72          * Attribute type
  73          */
  74         u_int32_t type;
  75
  76         /**
  77          * Attribute value
  78          */
  79         chunk_t value;
  80
  81         /**
  82          * Noskip flag
  83          */
  84         bool noskip_flag;
  85
  86         /**
  87          * Set of flags for Request Functional Component
  88          */
  89         pts_attr_req_funct_comp_evid_flag_t flags;
  90
  91         /**
  92          * Sub-component Depth
  93          */
  94         u_int32_t depth;
  95
  96         /**
  97          * Component Functional Name Vendor ID
  98          */
  99         u_int32_t comp_vendor_id;
 100
 101         /**
 102          * Functional Name Encoding Family
 103          */
 104         u_int8_t family;
 105
 106         /**
 107          * Functional Name Category Qualifier
 108          */
 109         u_int8_t qualifier;
 110
 111         /**
 112          * Component Functional Name
 113          */
 114         u_int32_t name;
 115 };
 116
 117 METHOD(pa_tnc_attr_t, get_vendor_id, pen_t,
 118         private_tcg_pts_attr_req_funct_comp_evid_t *this)
 119 {
 120         return this->vendor_id;
 121 }
 122
 123 METHOD(pa_tnc_attr_t, get_type, u_int32_t,
 124         private_tcg_pts_attr_req_funct_comp_evid_t *this)
 125 {
 126         return this->type;
 127 }
 128
 129 METHOD(pa_tnc_attr_t, get_value, chunk_t,
 130         private_tcg_pts_attr_req_funct_comp_evid_t *this)
 131 {
 132         return this->value;
 133 }
 134
 135 METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
 136         private_tcg_pts_attr_req_funct_comp_evid_t *this)
 137 {
 138         return this->noskip_flag;
 139 }
 140
 141 METHOD(pa_tnc_attr_t, set_noskip_flag,void,
 142         private_tcg_pts_attr_req_funct_comp_evid_t *this, bool noskip)
 143 {
 144         this->noskip_flag = noskip;
 145 }
 146
 147 METHOD(pa_tnc_attr_t, build, void,
 148         private_tcg_pts_attr_req_funct_comp_evid_t *this)
 149 {
 150         bio_writer_t *writer;
 151         u_int8_t flags = 0;
 152         u_int8_t family_and_qualifier = 0;
 153
 154         writer = bio_writer_create(PTS_REQ_FUNCT_COMP_EVID_SIZE);
 155
 156         /* Determine the flags to set*/
 157         if(this->flags & PTS_REQ_FUNC_COMP_TTC) flags += 1;
 158         if(this->flags & PTS_REQ_FUNC_COMP_VER) flags += 2;
 159         if(this->flags & PTS_REQ_FUNC_COMP_CURR) flags += 4;
 160         if(this->flags & PTS_REQ_FUNC_COMP_PCR) flags += 8;
 161         writer->write_uint8(writer, flags);
 162
 163         writer->write_uint24 (writer, this->depth);
 164         writer->write_uint24 (writer, this->comp_vendor_id);
 165
 166         if(this->family)
 167         {
 168                 DBG1(DBG_TNC, "Functional Name Encoding Family must be set to 00");
 169         }
 170
 171         writer->write_uint8 (writer, this->depth);
 172         writer->write_uint24 (writer, this->depth);
 173         writer->write_uint24 (writer, this->depth);
 174         writer->write_uint24 (writer, this->depth);
 175
 176
 177         this->value = chunk_clone(writer->get_buf(writer));
 178         writer->destroy(writer);
 179 }
 180
 181 METHOD(pa_tnc_attr_t, process, status_t,
 182         private_tcg_pts_attr_req_funct_comp_evid_t *this, u_int32_t *offset)
 183 {
 184         bio_reader_t *reader;
 185         u_int8_t flags;
 186
 187         if (this->value.len < PTS_AIK_SIZE)
 188         {
 189                 DBG1(DBG_TNC, "insufficient data for Attestation Identity Key");
 190                 *offset = 0;
 191                 return FAILED;
 192         }
 193         reader = bio_reader_create(this->value);
 194
 195         reader->read_uint8(reader, &flags);
 196         if(flags) this->naked_pub_aik = true;
 197
 198         reader->read_data  (reader, sizeof(this->value) - 1, &this->aik);
 199         this->aik = chunk_clone(this->aik);
 200         reader->destroy(reader);
 201
 202         return SUCCESS;
 203 }
 204
 205 METHOD(pa_tnc_attr_t, destroy, void,
 206         private_tcg_pts_attr_req_funct_comp_evid_t *this)
 207 {
 208         free(this->value.ptr);
 209         free(this);
 210 }
 211
 212 METHOD(tcg_pts_attr_req_funct_comp_evid_t, get_flags, pts_attr_req_funct_comp_evid_flag_t,
 213         private_tcg_pts_attr_req_funct_comp_evid_t *this)
 214 {
 215         return this->flags;
 216 }
 217
 218 METHOD(tcg_pts_attr_req_funct_comp_evid_t, set_flags, void,
 219         private_tcg_pts_attr_req_funct_comp_evid_t *this, pts_attr_req_funct_comp_evid_flag_t flags)
 220 {
 221         this->flags = flags;
 222 }
 223
 224 METHOD(tcg_pts_attr_req_funct_comp_evid_t, get_sub_component_depth, u_int32_t,
 225         private_tcg_pts_attr_req_funct_comp_evid_t *this)
 226 {
 227         return this->depth;
 228 }
 229
 230 METHOD(tcg_pts_attr_req_funct_comp_evid_t, get_comp_funct_name_vendor_id, u_int32_t,
 231         private_tcg_pts_attr_req_funct_comp_evid_t *this)
 232 {
 233         return this->comp_vendor_id;
 234 }
 235
 236 METHOD(tcg_pts_attr_req_funct_comp_evid_t, get_family, u_int8_t,
 237         private_tcg_pts_attr_req_funct_comp_evid_t *this)
 238 {
 239         return this->family;
 240 }
 241
 242 METHOD(tcg_pts_attr_req_funct_comp_evid_t, get_qualifier, u_int8_t,
 243         private_tcg_pts_attr_req_funct_comp_evid_t *this)
 244 {
 245         return this->qualifier;
 246 }
 247
 248 METHOD(tcg_pts_attr_req_funct_comp_evid_t, set_fam_qual, void,
 249                 private_tcg_pts_attr_req_funct_comp_evid_t *this,
 250                 u_int8_t family, u_int8_t qualifier)
 251 {
 252         this->family = family;
 253         this->qualifier = qualifier;
 254 }
 255
 256 METHOD(tcg_pts_attr_req_funct_comp_evid_t, get_comp_funct_name, u_int32_t,
 257         private_tcg_pts_attr_req_funct_comp_evid_t *this)
 258 {
 259         return this->name;
 260 }
 261
 262 METHOD(tcg_pts_attr_req_funct_comp_evid_t, set_comp_funct_name, void,
 263         private_tcg_pts_attr_req_funct_comp_evid_t *this, u_int32_t name)
 264 {
 265         this->name = name;
 266 }
 267
 268 /**
 269  * Described in header.
 270  */
 271 pa_tnc_attr_t *tcg_pts_attr_req_funct_comp_evid_create(
 272                                        pts_attr_req_funct_comp_evid_flag_t flags,
 273                                        u_int32_t depth,
 274                                        u_int32_t vendor_id,
 275                                        u_int8_t family,
 276                                        u_int8_t qualifier,
 277                                        u_int32_t name)
 278 {
 279         private_tcg_pts_attr_req_funct_comp_evid_t *this;
 280
 281         INIT(this,
 282                 .public = {
 283                         .pa_tnc_attribute = {
 284                                 .get_vendor_id = _get_vendor_id,
 285                                 .get_type = _get_type,
 286                                 .get_value = _get_value,
 287                                 .get_noskip_flag = _get_noskip_flag,
 288                                 .set_noskip_flag = _set_noskip_flag,
 289                                 .build = _build,
 290                                 .process = _process,
 291                                 .destroy = _destroy,
 292                         },
 293                         .get_flags= _get_flags,
 294                         .set_flags= _set_flags,
 295                         .get_sub_component_depth = _get_sub_component_depth,
 296                         .get_comp_funct_name_vendor_id = _get_comp_funct_name_vendor_id,
 297                         .get_family = _get_family,
 298                         .get_qualifier = _get_qualifier,
 299                         .set_fam_qual = _set_fam_qual,
 300                         .get_comp_funct_name = _get_comp_funct_name,
 301                         .set_comp_funct_name = _set_comp_funct_name,
 302                 },
 303                 .vendor_id = PEN_TCG,
 304                 .type = TCG_PTS_REQ_FUNCT_COMP_EVID,
 305                 .flags = flags,
 306                 .depth = depth,
 307                 .comp_vendor_id = vendor_id,
 308                 .family = family,
 309                 .qualifier = qualifier,
 310                 .name = name,
 311         );
 312
 313         return &this->public.pa_tnc_attribute;
 314 }
 315
 316
 317 /**
 318  * Described in header.
 319  */
 320 pa_tnc_attr_t *tcg_pts_attr_req_funct_comp_evid_create_from_data(chunk_t data)
 321 {
 322         private_tcg_pts_attr_req_funct_comp_evid_t *this;
 323
 324         INIT(this,
 325                 .public = {
 326                         .pa_tnc_attribute = {
 327                                 .get_vendor_id = _get_vendor_id,
 328                                 .get_type = _get_type,
 329                                 .get_value = _get_value,
 330                                 .get_noskip_flag = _get_noskip_flag,
 331                                 .set_noskip_flag = _set_noskip_flag,
 332                                 .build = _build,
 333                                 .process = _process,
 334                                 .destroy = _destroy,
 335                         },
 336                         .get_flags= _get_flags,
 337                         .set_flags= _set_flags,
 338                         .get_sub_component_depth = _get_sub_component_depth,
 339                         .get_comp_funct_name_vendor_id = _get_comp_funct_name_vendor_id,
 340                         .get_family = _get_family,
 341                         .get_qualifier = _get_qualifier,
 342                         .set_fam_qual = _set_fam_qual,
 343                         .get_comp_funct_name = _get_comp_funct_name,
 344                         .set_comp_funct_name = _set_comp_funct_name,
 345                 },
 346                 .vendor_id = PEN_TCG,
 347                 .type = TCG_PTS_REQ_FUNCT_COMP_EVID,
 348                 .value = chunk_clone(data),
 349         );
 350
 351         return &this->public.pa_tnc_attribute;
 352 }