Annotation of embedaddon/strongswan/src/libimcv/pts/components/pts_comp_evidence.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2011 Sansar Choinyambuu, Andreas Steffen
! 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 "pts/components/pts_comp_evidence.h"
! 17:
! 18: #include <utils/debug.h>
! 19:
! 20: typedef struct private_pts_comp_evidence_t private_pts_comp_evidence_t;
! 21:
! 22: /**
! 23: * Private data of a pts_comp_evidence_t object.
! 24: */
! 25: struct private_pts_comp_evidence_t {
! 26:
! 27: /**
! 28: * Public pts_comp_evidence_t interface.
! 29: */
! 30: pts_comp_evidence_t public;
! 31:
! 32: /**
! 33: * Component Functional Name
! 34: */
! 35: pts_comp_func_name_t *name;
! 36:
! 37: /**
! 38: * Sub-Component Depth
! 39: */
! 40: uint32_t depth;
! 41:
! 42: /**
! 43: * Measurement Time
! 44: */
! 45: time_t measurement_time;
! 46:
! 47: /**
! 48: * Measurement Time
! 49: */
! 50: chunk_t measurement;
! 51:
! 52: /**
! 53: * Measurement Hash Algorithm
! 54: */
! 55: pts_meas_algorithms_t hash_algorithm;
! 56:
! 57: /**
! 58: * Is PCR Information included?
! 59: */
! 60: bool has_pcr_info;
! 61:
! 62: /**
! 63: * PCR the measurement was extended into
! 64: */
! 65: uint32_t extended_pcr;
! 66:
! 67: /**
! 68: * PCR value before extension
! 69: */
! 70: chunk_t pcr_before;
! 71:
! 72: /**
! 73: * PCR value after extension
! 74: */
! 75: chunk_t pcr_after;
! 76:
! 77: /**
! 78: * Transformation used for extending measurement into PCR
! 79: */
! 80: pts_pcr_transform_t transform;
! 81:
! 82: /**
! 83: * Component Validation Result
! 84: */
! 85: pts_comp_evid_validation_t validation;
! 86:
! 87: /**
! 88: * Verification Policy URI
! 89: */
! 90: char *policy_uri;
! 91:
! 92: };
! 93:
! 94: METHOD(pts_comp_evidence_t, get_comp_func_name, pts_comp_func_name_t*,
! 95: private_pts_comp_evidence_t *this, uint32_t *depth)
! 96: {
! 97: if (depth)
! 98: {
! 99: *depth = this->depth;
! 100: }
! 101: return this->name;
! 102: }
! 103:
! 104: METHOD(pts_comp_evidence_t, get_extended_pcr, uint32_t,
! 105: private_pts_comp_evidence_t *this)
! 106: {
! 107: return this->extended_pcr;
! 108: }
! 109:
! 110: METHOD(pts_comp_evidence_t, get_measurement, chunk_t,
! 111: private_pts_comp_evidence_t *this, uint32_t *extended_pcr,
! 112: pts_meas_algorithms_t *algo, pts_pcr_transform_t *transform,
! 113: time_t *measurement_time)
! 114: {
! 115: if (extended_pcr)
! 116: {
! 117: *extended_pcr = this->extended_pcr;
! 118: }
! 119: if (algo)
! 120: {
! 121: *algo = this->hash_algorithm;
! 122: }
! 123: if (transform)
! 124: {
! 125: *transform = this->transform;
! 126: }
! 127: if (measurement_time)
! 128: {
! 129: *measurement_time = this->measurement_time;
! 130: }
! 131: return this->measurement;
! 132: }
! 133:
! 134: METHOD(pts_comp_evidence_t, get_pcr_info, bool,
! 135: private_pts_comp_evidence_t *this, chunk_t *pcr_before, chunk_t *pcr_after)
! 136: {
! 137: if (pcr_before)
! 138: {
! 139: *pcr_before = this->pcr_before;
! 140: }
! 141: if (pcr_after)
! 142: {
! 143: *pcr_after = this->pcr_after;
! 144: }
! 145: return this->has_pcr_info;
! 146: }
! 147:
! 148: METHOD(pts_comp_evidence_t, set_pcr_info, void,
! 149: private_pts_comp_evidence_t *this, chunk_t pcr_before, chunk_t pcr_after)
! 150: {
! 151: this->has_pcr_info = TRUE;
! 152: this->pcr_before = pcr_before;
! 153: this->pcr_after = pcr_after;
! 154:
! 155: DBG3(DBG_PTS, "PCR %2d before value : %#B", this->extended_pcr, &pcr_before);
! 156: DBG3(DBG_PTS, "PCR %2d after value : %#B", this->extended_pcr, &pcr_after);
! 157: }
! 158:
! 159: METHOD(pts_comp_evidence_t, get_validation, pts_comp_evid_validation_t,
! 160: private_pts_comp_evidence_t *this, char **uri)
! 161: {
! 162: if (uri)
! 163: {
! 164: *uri = this->policy_uri;
! 165: }
! 166: return this->validation;
! 167: }
! 168:
! 169: METHOD(pts_comp_evidence_t, set_validation, void,
! 170: private_pts_comp_evidence_t *this, pts_comp_evid_validation_t validation,
! 171: char *uri)
! 172: {
! 173: this->validation = validation;
! 174: if (uri)
! 175: {
! 176: this->policy_uri = strdup(uri);
! 177: DBG3(DBG_PTS, "'%s'", uri);
! 178: }
! 179: }
! 180:
! 181: METHOD(pts_comp_evidence_t, destroy, void,
! 182: private_pts_comp_evidence_t *this)
! 183: {
! 184: this->name->destroy(this->name);
! 185: free(this->measurement.ptr);
! 186: free(this->pcr_before.ptr);
! 187: free(this->pcr_after.ptr);
! 188: free(this->policy_uri);
! 189: free(this);
! 190: }
! 191:
! 192: /**
! 193: * See header
! 194: */
! 195: pts_comp_evidence_t *pts_comp_evidence_create(pts_comp_func_name_t *name,
! 196: uint32_t depth,
! 197: uint32_t extended_pcr,
! 198: pts_meas_algorithms_t algo,
! 199: pts_pcr_transform_t transform,
! 200: time_t measurement_time,
! 201: chunk_t measurement)
! 202: {
! 203: private_pts_comp_evidence_t *this;
! 204:
! 205: INIT(this,
! 206: .public = {
! 207: .get_comp_func_name = _get_comp_func_name,
! 208: .get_extended_pcr = _get_extended_pcr,
! 209: .get_measurement = _get_measurement,
! 210: .get_pcr_info = _get_pcr_info,
! 211: .set_pcr_info = _set_pcr_info,
! 212: .get_validation = _get_validation,
! 213: .set_validation = _set_validation,
! 214: .destroy = _destroy,
! 215: },
! 216: .name = name,
! 217: .depth = depth,
! 218: .extended_pcr = extended_pcr,
! 219: .hash_algorithm = algo,
! 220: .transform = transform,
! 221: .measurement_time = measurement_time,
! 222: .measurement = measurement,
! 223: );
! 224:
! 225: name->log(name, "");
! 226: DBG3(DBG_PTS, "measurement time: %T", &measurement_time, FALSE);
! 227: DBG3(DBG_PTS, "PCR %2d extended with: %#B", extended_pcr, &measurement);
! 228:
! 229: return &this->public;
! 230: }
! 231:
! 232: /**
! 233: * See header
! 234: */
! 235: pts_pcr_transform_t pts_meas_algo_to_pcr_transform(pts_meas_algorithms_t algo,
! 236: size_t pcr_len)
! 237: {
! 238: size_t hash_size;
! 239:
! 240: hash_size = pts_meas_algo_hash_size(algo);
! 241: if (hash_size == 0)
! 242: {
! 243: return PTS_PCR_TRANSFORM_NO;
! 244: }
! 245: if (hash_size == pcr_len)
! 246: {
! 247: return PTS_PCR_TRANSFORM_MATCH;
! 248: }
! 249: if (hash_size > pcr_len)
! 250: {
! 251: return PTS_PCR_TRANSFORM_LONG;
! 252: }
! 253: return PTS_PCR_TRANSFORM_SHORT;
! 254: }
! 255:
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