Annotation of embedaddon/strongswan/src/libimcv/tcg/pts/tcg_pts_attr_dh_nonce_params_resp.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2011-2012 Sansar Choinyambuu
! 3: * Copyright (C) 2011-2014 Andreas Steffen
! 4: * HSR Hochschule fuer Technik Rapperswil
! 5: *
! 6: * This program is free software; you can redistribute it and/or modify it
! 7: * under the terms of the GNU General Public License as published by the
! 8: * Free Software Foundation; either version 2 of the License, or (at your
! 9: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
! 10: *
! 11: * This program is distributed in the hope that it will be useful, but
! 12: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 13: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
! 14: * for more details.
! 15: */
! 16:
! 17: #include "tcg_pts_attr_dh_nonce_params_resp.h"
! 18:
! 19: #include <pa_tnc/pa_tnc_msg.h>
! 20: #include <bio/bio_writer.h>
! 21: #include <bio/bio_reader.h>
! 22: #include <utils/debug.h>
! 23:
! 24: typedef struct private_tcg_pts_attr_dh_nonce_params_resp_t
! 25: private_tcg_pts_attr_dh_nonce_params_resp_t;
! 26:
! 27: /**
! 28: * PTS DH Nonce Parameters Response
! 29: * see section 3.8.2 of PTS Protocol: Binding to TNC IF-M Specification
! 30: *
! 31: * 1 2 3
! 32: * 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
! 33: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 34: * | Reserved | Nonce Len |
! 35: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 36: * | Selected D-H Group | Hash Algorithm Set |
! 37: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 38: * | D-H Responder Nonce ... |
! 39: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 40: * | D-H Responder Public Value ... |
! 41: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 42: *
! 43: */
! 44:
! 45: #define PTS_DH_NONCE_PARAMS_RESP_SIZE 16
! 46: #define PTS_DH_NONCE_PARAMS_RESP_RESERVED 0x0000
! 47:
! 48: /**
! 49: * Private data of an tcg_pts_attr_dh_nonce_params_resp_t object.
! 50: */
! 51: struct private_tcg_pts_attr_dh_nonce_params_resp_t {
! 52:
! 53: /**
! 54: * Public members of tcg_pts_attr_dh_nonce_params_resp_t
! 55: */
! 56: tcg_pts_attr_dh_nonce_params_resp_t public;
! 57:
! 58: /**
! 59: * Vendor-specific attribute type
! 60: */
! 61: pen_type_t type;
! 62:
! 63: /**
! 64: * Length of attribute value
! 65: */
! 66: size_t length;
! 67:
! 68: /**
! 69: * Attribute value or segment
! 70: */
! 71: chunk_t value;
! 72:
! 73: /**
! 74: * Noskip flag
! 75: */
! 76: bool noskip_flag;
! 77:
! 78: /**
! 79: * Selected Diffie Hellman group
! 80: */
! 81: pts_dh_group_t dh_group;
! 82:
! 83: /**
! 84: * Supported Hashing Algorithms
! 85: */
! 86: pts_meas_algorithms_t hash_algo_set;
! 87:
! 88: /**
! 89: * DH Responder Nonce
! 90: */
! 91: chunk_t responder_nonce;
! 92:
! 93: /**
! 94: * DH Responder Public Value
! 95: */
! 96: chunk_t responder_value;
! 97:
! 98: /**
! 99: * Reference count
! 100: */
! 101: refcount_t ref;
! 102: };
! 103:
! 104: METHOD(pa_tnc_attr_t, get_type, pen_type_t,
! 105: private_tcg_pts_attr_dh_nonce_params_resp_t *this)
! 106: {
! 107: return this->type;
! 108: }
! 109:
! 110: METHOD(pa_tnc_attr_t, get_value, chunk_t,
! 111: private_tcg_pts_attr_dh_nonce_params_resp_t *this)
! 112: {
! 113: return this->value;
! 114: }
! 115:
! 116: METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
! 117: private_tcg_pts_attr_dh_nonce_params_resp_t *this)
! 118: {
! 119: return this->noskip_flag;
! 120: }
! 121:
! 122: METHOD(pa_tnc_attr_t, set_noskip_flag,void,
! 123: private_tcg_pts_attr_dh_nonce_params_resp_t *this, bool noskip)
! 124: {
! 125: this->noskip_flag = noskip;
! 126: }
! 127:
! 128: METHOD(pa_tnc_attr_t, build, void,
! 129: private_tcg_pts_attr_dh_nonce_params_resp_t *this)
! 130: {
! 131: bio_writer_t *writer;
! 132:
! 133: if (this->value.ptr)
! 134: {
! 135: return;
! 136: }
! 137: writer = bio_writer_create(PTS_DH_NONCE_PARAMS_RESP_SIZE);
! 138: writer->write_uint24(writer, PTS_DH_NONCE_PARAMS_RESP_RESERVED);
! 139: writer->write_uint8 (writer, this->responder_nonce.len);
! 140: writer->write_uint16(writer, this->dh_group);
! 141: writer->write_uint16(writer, this->hash_algo_set);
! 142: writer->write_data (writer, this->responder_nonce);
! 143: writer->write_data (writer, this->responder_value);
! 144:
! 145: this->value = writer->extract_buf(writer);
! 146: this->length = this->value.len;
! 147: writer->destroy(writer);
! 148: }
! 149:
! 150: METHOD(pa_tnc_attr_t, process, status_t,
! 151: private_tcg_pts_attr_dh_nonce_params_resp_t *this, uint32_t *offset)
! 152: {
! 153: bio_reader_t *reader;
! 154: uint32_t reserved;
! 155: uint8_t nonce_len;
! 156: uint16_t dh_group, hash_algo_set;
! 157:
! 158: *offset = 0;
! 159:
! 160: if (this->value.len < this->length)
! 161: {
! 162: return NEED_MORE;
! 163: }
! 164: if (this->value.len < PTS_DH_NONCE_PARAMS_RESP_SIZE)
! 165: {
! 166: DBG1(DBG_TNC, "insufficient data for PTS DH Nonce Parameters Response");
! 167: return FAILED;
! 168: }
! 169: reader = bio_reader_create(this->value);
! 170: reader->read_uint24(reader, &reserved);
! 171: reader->read_uint8 (reader, &nonce_len);
! 172: reader->read_uint16(reader, &dh_group);
! 173: reader->read_uint16(reader, &hash_algo_set);
! 174: reader->read_data(reader, nonce_len, &this->responder_nonce);
! 175: reader->read_data(reader, reader->remaining(reader), &this->responder_value);
! 176: this->dh_group = dh_group;
! 177: this->hash_algo_set = hash_algo_set;
! 178: this->responder_nonce = chunk_clone(this->responder_nonce);
! 179: this->responder_value = chunk_clone(this->responder_value);
! 180: reader->destroy(reader);
! 181:
! 182: return SUCCESS;
! 183: }
! 184:
! 185: METHOD(pa_tnc_attr_t, add_segment, void,
! 186: private_tcg_pts_attr_dh_nonce_params_resp_t *this, chunk_t segment)
! 187: {
! 188: this->value = chunk_cat("mc", this->value, segment);
! 189: }
! 190:
! 191: METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
! 192: private_tcg_pts_attr_dh_nonce_params_resp_t *this)
! 193: {
! 194: ref_get(&this->ref);
! 195: return &this->public.pa_tnc_attribute;
! 196: }
! 197:
! 198: METHOD(pa_tnc_attr_t, destroy, void,
! 199: private_tcg_pts_attr_dh_nonce_params_resp_t *this)
! 200: {
! 201: if (ref_put(&this->ref))
! 202: {
! 203: free(this->value.ptr);
! 204: free(this->responder_nonce.ptr);
! 205: free(this->responder_value.ptr);
! 206: free(this);
! 207: }
! 208: }
! 209:
! 210: METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_dh_group, pts_dh_group_t,
! 211: private_tcg_pts_attr_dh_nonce_params_resp_t *this)
! 212: {
! 213: return this->dh_group;
! 214: }
! 215:
! 216: METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_hash_algo_set,
! 217: pts_meas_algorithms_t, private_tcg_pts_attr_dh_nonce_params_resp_t *this)
! 218: {
! 219: return this->hash_algo_set;
! 220: }
! 221:
! 222: METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_responder_nonce, chunk_t,
! 223: private_tcg_pts_attr_dh_nonce_params_resp_t *this)
! 224: {
! 225: return this->responder_nonce;
! 226: }
! 227:
! 228: METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_responder_value, chunk_t,
! 229: private_tcg_pts_attr_dh_nonce_params_resp_t *this)
! 230: {
! 231: return this->responder_value;
! 232: }
! 233:
! 234: /**
! 235: * Described in header.
! 236: */
! 237: pa_tnc_attr_t *tcg_pts_attr_dh_nonce_params_resp_create(pts_dh_group_t dh_group,
! 238: pts_meas_algorithms_t hash_algo_set,
! 239: chunk_t responder_nonce,
! 240: chunk_t responder_value)
! 241: {
! 242: private_tcg_pts_attr_dh_nonce_params_resp_t *this;
! 243:
! 244: INIT(this,
! 245: .public = {
! 246: .pa_tnc_attribute = {
! 247: .get_type = _get_type,
! 248: .get_value = _get_value,
! 249: .get_noskip_flag = _get_noskip_flag,
! 250: .set_noskip_flag = _set_noskip_flag,
! 251: .build = _build,
! 252: .process = _process,
! 253: .add_segment = _add_segment,
! 254: .get_ref = _get_ref,
! 255: .destroy = _destroy,
! 256: },
! 257: .get_dh_group = _get_dh_group,
! 258: .get_hash_algo_set = _get_hash_algo_set,
! 259: .get_responder_nonce = _get_responder_nonce,
! 260: .get_responder_value = _get_responder_value,
! 261: },
! 262: .type = { PEN_TCG, TCG_PTS_DH_NONCE_PARAMS_RESP },
! 263: .dh_group = dh_group,
! 264: .hash_algo_set = hash_algo_set,
! 265: .responder_nonce = chunk_clone(responder_nonce),
! 266: .responder_value = responder_value,
! 267: .ref = 1,
! 268: );
! 269:
! 270: return &this->public.pa_tnc_attribute;
! 271: }
! 272:
! 273: /**
! 274: * Described in header.
! 275: */
! 276: pa_tnc_attr_t *tcg_pts_attr_dh_nonce_params_resp_create_from_data(size_t length,
! 277: chunk_t value)
! 278: {
! 279: private_tcg_pts_attr_dh_nonce_params_resp_t *this;
! 280:
! 281: INIT(this,
! 282: .public = {
! 283: .pa_tnc_attribute = {
! 284: .get_type = _get_type,
! 285: .get_value = _get_value,
! 286: .get_noskip_flag = _get_noskip_flag,
! 287: .set_noskip_flag = _set_noskip_flag,
! 288: .build = _build,
! 289: .process = _process,
! 290: .add_segment = _add_segment,
! 291: .get_ref = _get_ref,
! 292: .destroy = _destroy,
! 293: },
! 294: .get_dh_group = _get_dh_group,
! 295: .get_hash_algo_set = _get_hash_algo_set,
! 296: .get_responder_nonce = _get_responder_nonce,
! 297: .get_responder_value = _get_responder_value,
! 298: },
! 299: .type = { PEN_TCG, TCG_PTS_DH_NONCE_PARAMS_RESP },
! 300: .length = length,
! 301: .value = chunk_clone(value),
! 302: .ref = 1,
! 303: );
! 304:
! 305: return &this->public.pa_tnc_attribute;
! 306: }
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