2f9e0fa9ff5e033469917d05e182f4190bca5e3d
[strongswan.git] / src / libpts / pts / pts.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 "pts.h"
17
18 #include <debug.h>
19 #include <crypto/hashers/hasher.h>
20 #include <bio/bio_writer.h>
21 #include <bio/bio_reader.h>
22
23 #include <trousers/tss.h>
24 #include <trousers/trousers.h>
25
26 #include <sys/stat.h>
27 #include <sys/utsname.h>
28 #include <errno.h>
29
30 #define PTS_BUF_SIZE 4096
31
32 typedef struct private_pts_t private_pts_t;
33
34 /**
35 * Private data of a pts_t object.
36 *
37 */
38 struct private_pts_t {
39
40 /**
41 * Public pts_t interface.
42 */
43 pts_t public;
44
45 /**
46 * PTS Protocol Capabilities
47 */
48 pts_proto_caps_flag_t proto_caps;
49
50 /**
51 * PTS Measurement Algorithm
52 */
53 pts_meas_algorithms_t algorithm;
54
55 /**
56 * DH Hash Algorithm
57 */
58 pts_meas_algorithms_t dh_hash_algorithm;
59
60 /**
61 * PTS Diffie-Hellman Secret
62 */
63 diffie_hellman_t *dh;
64
65 /**
66 * PTS Diffie-Hellman Initiator Nonce
67 */
68 chunk_t initiator_nonce;
69
70 /**
71 * PTS Diffie-Hellman Responder Nonce
72 */
73 chunk_t responder_nonce;
74
75 /**
76 * Secret assessment value to be used for TPM Quote as an external data
77 */
78 chunk_t secret;
79
80 /**
81 * Platform and OS Info
82 */
83 char *platform_info;
84
85 /**
86 * TRUE if IMC-PTS, FALSE if IMV-PTS
87 */
88 bool is_imc;
89
90 /**
91 * Do we have an activated TPM
92 */
93 bool has_tpm;
94
95 /**
96 * Contains a TPM_CAP_VERSION_INFO struct
97 */
98 chunk_t tpm_version_info;
99
100 /**
101 * Contains TSS Blob structure for AIK
102 */
103 chunk_t aik_blob;
104
105 /**
106 * Contains a Attestation Identity Key or Certificate
107 */
108 certificate_t *aik;
109
110 /**
111 * Table of extended PCRs with corresponding values
112 */
113 u_char* pcrs[PCR_MAX_NUM];
114
115 /**
116 * Length of PCR registers
117 */
118 size_t pcr_len;
119
120 /**
121 * Number of extended PCR registers
122 */
123 u_int32_t pcr_count;
124
125 /**
126 * Highest extended PCR register
127 */
128 u_int32_t pcr_max;
129
130 /**
131 * Bitmap of extended PCR registers
132 */
133 u_int8_t pcr_select[PCR_MAX_NUM / 8];
134
135 };
136
137 METHOD(pts_t, get_proto_caps, pts_proto_caps_flag_t,
138 private_pts_t *this)
139 {
140 return this->proto_caps;
141 }
142
143 METHOD(pts_t, set_proto_caps, void,
144 private_pts_t *this, pts_proto_caps_flag_t flags)
145 {
146 this->proto_caps = flags;
147 DBG2(DBG_PTS, "supported PTS protocol capabilities: %s%s%s%s%s",
148 flags & PTS_PROTO_CAPS_C ? "C" : ".",
149 flags & PTS_PROTO_CAPS_V ? "V" : ".",
150 flags & PTS_PROTO_CAPS_D ? "D" : ".",
151 flags & PTS_PROTO_CAPS_T ? "T" : ".",
152 flags & PTS_PROTO_CAPS_X ? "X" : ".");
153 }
154
155 METHOD(pts_t, get_meas_algorithm, pts_meas_algorithms_t,
156 private_pts_t *this)
157 {
158 return this->algorithm;
159 }
160
161 METHOD(pts_t, set_meas_algorithm, void,
162 private_pts_t *this, pts_meas_algorithms_t algorithm)
163 {
164 hash_algorithm_t hash_alg;
165
166 hash_alg = pts_meas_algo_to_hash(algorithm);
167 DBG2(DBG_PTS, "selected PTS measurement algorithm is %N",
168 hash_algorithm_names, hash_alg);
169 if (hash_alg != HASH_UNKNOWN)
170 {
171 this->algorithm = algorithm;
172 }
173 }
174
175 METHOD(pts_t, get_dh_hash_algorithm, pts_meas_algorithms_t,
176 private_pts_t *this)
177 {
178 return this->dh_hash_algorithm;
179 }
180
181 METHOD(pts_t, set_dh_hash_algorithm, void,
182 private_pts_t *this, pts_meas_algorithms_t algorithm)
183 {
184 hash_algorithm_t hash_alg;
185
186 hash_alg = pts_meas_algo_to_hash(algorithm);
187 DBG2(DBG_PTS, "selected DH hash algorithm is %N",
188 hash_algorithm_names, hash_alg);
189 if (hash_alg != HASH_UNKNOWN)
190 {
191 this->dh_hash_algorithm = algorithm;
192 }
193 }
194
195
196 METHOD(pts_t, create_dh_nonce, bool,
197 private_pts_t *this, pts_dh_group_t group, int nonce_len)
198 {
199 diffie_hellman_group_t dh_group;
200 chunk_t *nonce;
201 rng_t *rng;
202
203 dh_group = pts_dh_group_to_ike(group);
204 DBG2(DBG_PTS, "selected PTS DH group is %N",
205 diffie_hellman_group_names, dh_group);
206 DESTROY_IF(this->dh);
207 this->dh = lib->crypto->create_dh(lib->crypto, dh_group);
208
209 rng = lib->crypto->create_rng(lib->crypto, RNG_STRONG);
210 if (!rng)
211 {
212 DBG1(DBG_PTS, "no rng available");
213 return FALSE;
214 }
215 DBG2(DBG_PTS, "nonce length is %d", nonce_len);
216 nonce = this->is_imc ? &this->responder_nonce : &this->initiator_nonce;
217 chunk_free(nonce);
218 rng->allocate_bytes(rng, nonce_len, nonce);
219 rng->destroy(rng);
220
221 return TRUE;
222 }
223
224 METHOD(pts_t, get_my_public_value, void,
225 private_pts_t *this, chunk_t *value, chunk_t *nonce)
226 {
227 this->dh->get_my_public_value(this->dh, value);
228 *nonce = this->is_imc ? this->responder_nonce : this->initiator_nonce;
229 }
230
231 METHOD(pts_t, set_peer_public_value, void,
232 private_pts_t *this, chunk_t value, chunk_t nonce)
233 {
234 this->dh->set_other_public_value(this->dh, value);
235
236 nonce = chunk_clone(nonce);
237 if (this->is_imc)
238 {
239 this->initiator_nonce = nonce;
240 }
241 else
242 {
243 this->responder_nonce = nonce;
244 }
245 }
246
247 METHOD(pts_t, calculate_secret, bool,
248 private_pts_t *this)
249 {
250 hasher_t *hasher;
251 hash_algorithm_t hash_alg;
252 chunk_t shared_secret;
253
254 /* Check presence of nonces */
255 if (!this->initiator_nonce.len || !this->responder_nonce.len)
256 {
257 DBG1(DBG_PTS, "initiator and/or responder nonce is not available");
258 return FALSE;
259 }
260 DBG3(DBG_PTS, "initiator nonce: %B", &this->initiator_nonce);
261 DBG3(DBG_PTS, "responder nonce: %B", &this->responder_nonce);
262
263 /* Calculate the DH secret */
264 if (this->dh->get_shared_secret(this->dh, &shared_secret) != SUCCESS)
265 {
266 DBG1(DBG_PTS, "shared DH secret computation failed");
267 return FALSE;
268 }
269 DBG3(DBG_PTS, "shared DH secret: %B", &shared_secret);
270
271 /* Calculate the secret assessment value */
272 hash_alg = pts_meas_algo_to_hash(this->dh_hash_algorithm);
273 hasher = lib->crypto->create_hasher(lib->crypto, hash_alg);
274
275 hasher->allocate_hash(hasher, chunk_from_chars('1'), NULL);
276 hasher->allocate_hash(hasher, this->initiator_nonce, NULL);
277 hasher->allocate_hash(hasher, this->responder_nonce, NULL);
278 hasher->allocate_hash(hasher, shared_secret, &this->secret);
279 hasher->destroy(hasher);
280
281 /* The DH secret must be destroyed */
282 chunk_clear(&shared_secret);
283
284 /*
285 * Truncate the hash to 20 bytes to fit the ExternalData
286 * argument of the TPM Quote command
287 */
288 this->secret.len = min(this->secret.len, 20);
289 DBG3(DBG_PTS, "secret assessment value: %B", &this->secret);
290 return TRUE;
291 }
292
293 /**
294 * Print TPM 1.2 Version Info
295 */
296 static void print_tpm_version_info(private_pts_t *this)
297 {
298 TPM_CAP_VERSION_INFO versionInfo;
299 UINT64 offset = 0;
300 TSS_RESULT result;
301
302 result = Trspi_UnloadBlob_CAP_VERSION_INFO(&offset,
303 this->tpm_version_info.ptr, &versionInfo);
304 if (result != TSS_SUCCESS)
305 {
306 DBG1(DBG_PTS, "could not parse tpm version info: tss error 0x%x",
307 result);
308 }
309 else
310 {
311 DBG2(DBG_PTS, "TPM 1.2 Version Info: Chip Version: %hhu.%hhu.%hhu.%hhu,"
312 " Spec Level: %hu, Errata Rev: %hhu, Vendor ID: %.4s",
313 versionInfo.version.major, versionInfo.version.minor,
314 versionInfo.version.revMajor, versionInfo.version.revMinor,
315 versionInfo.specLevel, versionInfo.errataRev,
316 versionInfo.tpmVendorID);
317 }
318 }
319
320 METHOD(pts_t, get_platform_info, char*,
321 private_pts_t *this)
322 {
323 return this->platform_info;
324 }
325
326 METHOD(pts_t, set_platform_info, void,
327 private_pts_t *this, char *info)
328 {
329 free(this->platform_info);
330 this->platform_info = strdup(info);
331 }
332
333 METHOD(pts_t, get_tpm_version_info, bool,
334 private_pts_t *this, chunk_t *info)
335 {
336 if (!this->has_tpm)
337 {
338 return FALSE;
339 }
340 *info = this->tpm_version_info;
341 print_tpm_version_info(this);
342 return TRUE;
343 }
344
345 METHOD(pts_t, set_tpm_version_info, void,
346 private_pts_t *this, chunk_t info)
347 {
348 this->tpm_version_info = chunk_clone(info);
349 print_tpm_version_info(this);
350 }
351
352 /**
353 * Load an AIK Blob (TSS_TSPATTRIB_KEYBLOB_BLOB attribute)
354 */
355 static void load_aik_blob(private_pts_t *this)
356 {
357 char *blob_path;
358 FILE *fp;
359 u_int32_t aikBlobLen;
360
361 blob_path = lib->settings->get_str(lib->settings,
362 "libimcv.plugins.imc-attestation.aik_blob", NULL);
363
364 if (blob_path)
365 {
366 /* Read aik key blob from a file */
367 if ((fp = fopen(blob_path, "r")) == NULL)
368 {
369 DBG1(DBG_PTS, "unable to open AIK Blob file: %s", blob_path);
370 return;
371 }
372
373 fseek(fp, 0, SEEK_END);
374 aikBlobLen = ftell(fp);
375 fseek(fp, 0L, SEEK_SET);
376
377 this->aik_blob = chunk_alloc(aikBlobLen);
378 if (fread(this->aik_blob.ptr, 1, aikBlobLen, fp))
379 {
380 DBG2(DBG_PTS, "loaded AIK Blob from '%s'", blob_path);
381 DBG3(DBG_PTS, "AIK Blob: %B", &this->aik_blob);
382 }
383 else
384 {
385 DBG1(DBG_PTS, "unable to read AIK Blob file '%s'", blob_path);
386 }
387 fclose(fp);
388 return;
389 }
390
391 DBG1(DBG_PTS, "AIK Blob is not available");
392 }
393
394 /**
395 * Load an AIK certificate or public key
396 * the certificate having precedence over the public key if both are present
397 */
398 static void load_aik(private_pts_t *this)
399 {
400 char *cert_path, *key_path;
401
402 cert_path = lib->settings->get_str(lib->settings,
403 "libimcv.plugins.imc-attestation.aik_cert", NULL);
404 key_path = lib->settings->get_str(lib->settings,
405 "libimcv.plugins.imc-attestation.aik_key", NULL);
406
407 if (cert_path)
408 {
409 this->aik = lib->creds->create(lib->creds, CRED_CERTIFICATE,
410 CERT_X509, BUILD_FROM_FILE,
411 cert_path, BUILD_END);
412 if (this->aik)
413 {
414 DBG2(DBG_PTS, "loaded AIK certificate from '%s'", cert_path);
415 return;
416 }
417 }
418 if (key_path)
419 {
420 this->aik = lib->creds->create(lib->creds, CRED_CERTIFICATE,
421 CERT_TRUSTED_PUBKEY, BUILD_FROM_FILE,
422 key_path, BUILD_END);
423 if (this->aik)
424 {
425 DBG2(DBG_PTS, "loaded AIK public key from '%s'", key_path);
426 return;
427 }
428 }
429
430 DBG1(DBG_PTS, "neither AIK certificate nor public key is available");
431 }
432
433 METHOD(pts_t, get_aik, certificate_t*,
434 private_pts_t *this)
435 {
436 return this->aik;
437 }
438
439 METHOD(pts_t, set_aik, void,
440 private_pts_t *this, certificate_t *aik)
441 {
442 DESTROY_IF(this->aik);
443 this->aik = aik->get_ref(aik);
444 }
445
446 METHOD(pts_t, hash_file, bool,
447 private_pts_t *this, hasher_t *hasher, char *pathname, u_char *hash)
448 {
449 u_char buffer[PTS_BUF_SIZE];
450 FILE *file;
451 int bytes_read;
452
453 file = fopen(pathname, "rb");
454 if (!file)
455 {
456 DBG1(DBG_PTS," file '%s' can not be opened, %s", pathname,
457 strerror(errno));
458 return FALSE;
459 }
460 while (TRUE)
461 {
462 bytes_read = fread(buffer, 1, sizeof(buffer), file);
463 if (bytes_read > 0)
464 {
465 hasher->get_hash(hasher, chunk_create(buffer, bytes_read), NULL);
466 }
467 else
468 {
469 hasher->get_hash(hasher, chunk_empty, hash);
470 break;
471 }
472 }
473 fclose(file);
474
475 return TRUE;
476 }
477
478 /**
479 * Get the relative filename of a fully qualified file pathname
480 */
481 static char* get_filename(char *pathname)
482 {
483 char *pos, *filename;
484
485 pos = filename = pathname;
486 while (pos && *(++pos) != '\0')
487 {
488 filename = pos;
489 pos = strchr(filename, '/');
490 }
491 return filename;
492 }
493
494 METHOD(pts_t, is_path_valid, bool,
495 private_pts_t *this, char *path, pts_error_code_t *error_code)
496 {
497 struct stat st;
498
499 *error_code = 0;
500
501 if (!stat(path, &st))
502 {
503 return TRUE;
504 }
505 else if (errno == ENOENT || errno == ENOTDIR)
506 {
507 DBG1(DBG_PTS, "file/directory does not exist %s", path);
508 *error_code = TCG_PTS_FILE_NOT_FOUND;
509 }
510 else if (errno == EFAULT)
511 {
512 DBG1(DBG_PTS, "bad address %s", path);
513 *error_code = TCG_PTS_INVALID_PATH;
514 }
515 else
516 {
517 DBG1(DBG_PTS, "error: %s occured while validating path: %s",
518 strerror(errno), path);
519 return FALSE;
520 }
521
522 return TRUE;
523 }
524
525 METHOD(pts_t, do_measurements, pts_file_meas_t*,
526 private_pts_t *this, u_int16_t request_id, char *pathname, bool is_directory)
527 {
528 hasher_t *hasher;
529 hash_algorithm_t hash_alg;
530 u_char hash[HASH_SIZE_SHA384];
531 chunk_t measurement;
532 pts_file_meas_t *measurements;
533
534 /* Create a hasher */
535 hash_alg = pts_meas_algo_to_hash(this->algorithm);
536 hasher = lib->crypto->create_hasher(lib->crypto, hash_alg);
537 if (!hasher)
538 {
539 DBG1(DBG_PTS, "hasher %N not available", hash_algorithm_names, hash_alg);
540 return NULL;
541 }
542
543 /* Create a measurement object */
544 measurements = pts_file_meas_create(request_id);
545
546 /* Link the hash to the measurement and set the measurement length */
547 measurement = chunk_create(hash, hasher->get_hash_size(hasher));
548
549 if (is_directory)
550 {
551 enumerator_t *enumerator;
552 char *rel_name, *abs_name;
553 struct stat st;
554
555 enumerator = enumerator_create_directory(pathname);
556 if (!enumerator)
557 {
558 DBG1(DBG_PTS," directory '%s' can not be opened, %s", pathname,
559 strerror(errno));
560 hasher->destroy(hasher);
561 measurements->destroy(measurements);
562 return NULL;
563 }
564 while (enumerator->enumerate(enumerator, &rel_name, &abs_name, &st))
565 {
566 /* measure regular files only */
567 if (S_ISREG(st.st_mode) && *rel_name != '.')
568 {
569 if (!hash_file(this, hasher, abs_name, hash))
570 {
571 enumerator->destroy(enumerator);
572 hasher->destroy(hasher);
573 measurements->destroy(measurements);
574 return NULL;
575 }
576 DBG2(DBG_PTS, " %#B for '%s'", &measurement, rel_name);
577 measurements->add(measurements, rel_name, measurement);
578 }
579 }
580 enumerator->destroy(enumerator);
581 }
582 else
583 {
584 char *filename;
585
586 if (!hash_file(this, hasher, pathname, hash))
587 {
588 hasher->destroy(hasher);
589 measurements->destroy(measurements);
590 return NULL;
591 }
592 filename = get_filename(pathname);
593 DBG2(DBG_PTS, " %#B for '%s'", &measurement, filename);
594 measurements->add(measurements, filename, measurement);
595 }
596 hasher->destroy(hasher);
597
598 return measurements;
599 }
600
601 /**
602 * Obtain statistical information describing a file
603 */
604 static bool file_metadata(char *pathname, pts_file_metadata_t **entry)
605 {
606 struct stat st;
607 pts_file_metadata_t *this;
608
609 this = malloc_thing(pts_file_metadata_t);
610
611 if (stat(pathname, &st))
612 {
613 DBG1(DBG_PTS, "Unable to obtain statistics about '%s'", pathname);
614 return FALSE;
615 }
616
617 if (S_ISREG(st.st_mode))
618 {
619 this->type = PTS_FILE_REGULAR;
620 }
621 else if (S_ISDIR(st.st_mode))
622 {
623 this->type = PTS_FILE_DIRECTORY;
624 }
625 else if (S_ISCHR(st.st_mode))
626 {
627 this->type = PTS_FILE_CHAR_SPEC;
628 }
629 else if (S_ISBLK(st.st_mode))
630 {
631 this->type = PTS_FILE_BLOCK_SPEC;
632 }
633 else if (S_ISFIFO(st.st_mode))
634 {
635 this->type = PTS_FILE_FIFO;
636 }
637 else if (S_ISLNK(st.st_mode))
638 {
639 this->type = PTS_FILE_SYM_LINK;
640 }
641 else if (S_ISSOCK(st.st_mode))
642 {
643 this->type = PTS_FILE_SOCKET;
644 }
645 else
646 {
647 this->type = PTS_FILE_OTHER;
648 }
649
650 this->filesize = st.st_size;
651 this->created = st.st_ctime;
652 this->modified = st.st_mtime;
653 this->accessed = st.st_atime;
654 this->owner = st.st_uid;
655 this->group = st.st_gid;
656
657 *entry = this;
658 return TRUE;
659 }
660
661 METHOD(pts_t, get_metadata, pts_file_meta_t*,
662 private_pts_t *this, char *pathname, bool is_directory)
663 {
664 pts_file_meta_t *metadata;
665 pts_file_metadata_t *entry;
666
667 /* Create a metadata object */
668 metadata = pts_file_meta_create();
669
670 if (is_directory)
671 {
672 enumerator_t *enumerator;
673 char *rel_name, *abs_name;
674 struct stat st;
675
676 enumerator = enumerator_create_directory(pathname);
677 if (!enumerator)
678 {
679 DBG1(DBG_PTS," directory '%s' can not be opened, %s", pathname,
680 strerror(errno));
681 metadata->destroy(metadata);
682 return NULL;
683 }
684 while (enumerator->enumerate(enumerator, &rel_name, &abs_name, &st))
685 {
686 /* measure regular files only */
687 if (S_ISREG(st.st_mode) && *rel_name != '.')
688 {
689 if (!file_metadata(abs_name, &entry))
690 {
691 enumerator->destroy(enumerator);
692 metadata->destroy(metadata);
693 return NULL;
694 }
695 entry->filename = strdup(rel_name);
696 metadata->add(metadata, entry);
697 }
698 }
699 enumerator->destroy(enumerator);
700 }
701 else
702 {
703 if (!file_metadata(pathname, &entry))
704 {
705 metadata->destroy(metadata);
706 return NULL;
707 }
708 entry->filename = strdup(get_filename(pathname));
709 metadata->add(metadata, entry);
710 }
711
712 return metadata;
713 }
714
715 METHOD(pts_t, read_pcr, bool,
716 private_pts_t *this, u_int32_t pcr_num, chunk_t *pcr_value)
717 {
718 TSS_HCONTEXT hContext;
719 TSS_HTPM hTPM;
720 TSS_RESULT result;
721 chunk_t rgbPcrValue;
722
723 bool success = FALSE;
724
725 result = Tspi_Context_Create(&hContext);
726 if (result != TSS_SUCCESS)
727 {
728 DBG1(DBG_PTS, "TPM context could not be created: tss error 0x%x", result);
729 return FALSE;
730 }
731
732 result = Tspi_Context_Connect(hContext, NULL);
733 if (result != TSS_SUCCESS)
734 {
735 goto err;
736 }
737 result = Tspi_Context_GetTpmObject (hContext, &hTPM);
738 if (result != TSS_SUCCESS)
739 {
740 goto err;
741 }
742 result = Tspi_TPM_PcrRead(hTPM, pcr_num, &rgbPcrValue.len, &rgbPcrValue.ptr);
743 if (result != TSS_SUCCESS)
744 {
745 goto err;
746 }
747 *pcr_value = chunk_clone(rgbPcrValue);
748 DBG3(DBG_PTS, "PCR %d value:%B", pcr_num, pcr_value);
749 success = TRUE;
750
751 err:
752 if (!success)
753 {
754 DBG1(DBG_PTS, "TPM not available: tss error 0x%x", result);
755 }
756 Tspi_Context_FreeMemory(hContext, NULL);
757 Tspi_Context_Close(hContext);
758
759 return success;
760 }
761
762 METHOD(pts_t, extend_pcr, bool,
763 private_pts_t *this, u_int32_t pcr_num, chunk_t input, chunk_t *output)
764 {
765 TSS_HCONTEXT hContext;
766 TSS_HTPM hTPM;
767 TSS_RESULT result;
768 u_int32_t pcr_length;
769 chunk_t pcr_value;
770
771 result = Tspi_Context_Create(&hContext);
772 if (result != TSS_SUCCESS)
773 {
774 DBG1(DBG_PTS, "TPM context could not be created: tss error 0x%x",
775 result);
776 return FALSE;
777 }
778 result = Tspi_Context_Connect(hContext, NULL);
779 if (result != TSS_SUCCESS)
780 {
781 goto err;
782 }
783 result = Tspi_Context_GetTpmObject (hContext, &hTPM);
784 if (result != TSS_SUCCESS)
785 {
786 goto err;
787 }
788
789 pcr_value = chunk_alloc(PCR_LEN);
790 result = Tspi_TPM_PcrExtend(hTPM, pcr_num, PCR_LEN, input.ptr,
791 NULL, &pcr_length, &pcr_value.ptr);
792 if (result != TSS_SUCCESS)
793 {
794 goto err;
795 }
796
797 *output = pcr_value;
798 *output = chunk_clone(*output);
799
800 chunk_clear(&pcr_value);
801 Tspi_Context_Close(hContext);
802 DBG3(DBG_PTS, "PCR %d extended with: %B", pcr_num, &input);
803 DBG3(DBG_PTS, "PCR %d value after extend: %B", pcr_num, output);
804 return TRUE;
805
806 err:
807 chunk_clear(&pcr_value);
808 DBG1(DBG_PTS, "TPM not available: tss error 0x%x", result);
809 Tspi_Context_Close(hContext);
810 return FALSE;
811 }
812
813
814 static void clear_pcrs(private_pts_t *this)
815 {
816 int i;
817
818 for (i = 0; i <= this->pcr_max; i++)
819 {
820 free(this->pcrs[i]);
821 this->pcrs[i] = NULL;
822 }
823 this->pcr_count = 0;
824 this->pcr_max = 0;
825
826 memset(this->pcr_select, 0x00, sizeof(this->pcr_select));
827 }
828
829 METHOD(pts_t, quote_tpm, bool,
830 private_pts_t *this, bool use_quote2, chunk_t *pcr_comp, chunk_t *quote_sig)
831 {
832 TSS_HCONTEXT hContext;
833 TSS_HTPM hTPM;
834 TSS_HKEY hAIK;
835 TSS_HKEY hSRK;
836 TSS_HPOLICY srkUsagePolicy;
837 TSS_UUID SRK_UUID = TSS_UUID_SRK;
838 BYTE secret[] = TSS_WELL_KNOWN_SECRET;
839 TSS_HPCRS hPcrComposite;
840 TSS_VALIDATION valData;
841 TSS_RESULT result;
842 chunk_t quote_info;
843 BYTE* versionInfo;
844 u_int32_t versionInfoSize, pcr, i = 0, f = 1;
845 bool success = FALSE;
846
847 result = Tspi_Context_Create(&hContext);
848 if (result != TSS_SUCCESS)
849 {
850 DBG1(DBG_PTS, "TPM context could not be created: tss error 0x%x",
851 result);
852 return FALSE;
853 }
854 result = Tspi_Context_Connect(hContext, NULL);
855 if (result != TSS_SUCCESS)
856 {
857 goto err1;
858 }
859 result = Tspi_Context_GetTpmObject (hContext, &hTPM);
860 if (result != TSS_SUCCESS)
861 {
862 goto err1;
863 }
864
865 /* Retrieve SRK from TPM and set the authentication to well known secret*/
866 result = Tspi_Context_LoadKeyByUUID(hContext, TSS_PS_TYPE_SYSTEM,
867 SRK_UUID, &hSRK);
868 if (result != TSS_SUCCESS)
869 {
870 goto err1;
871 }
872
873 result = Tspi_GetPolicyObject(hSRK, TSS_POLICY_USAGE, &srkUsagePolicy);
874 if (result != TSS_SUCCESS)
875 {
876 goto err1;
877 }
878 result = Tspi_Policy_SetSecret(srkUsagePolicy, TSS_SECRET_MODE_SHA1,
879 20, secret);
880 if (result != TSS_SUCCESS)
881 {
882 goto err1;
883 }
884
885 result = Tspi_Context_LoadKeyByBlob (hContext, hSRK, this->aik_blob.len,
886 this->aik_blob.ptr, &hAIK);
887 if (result != TSS_SUCCESS)
888 {
889 goto err1;
890 }
891
892 /* Create PCR composite object */
893 result = use_quote2 ?
894 Tspi_Context_CreateObject(hContext, TSS_OBJECT_TYPE_PCRS,
895 TSS_PCRS_STRUCT_INFO_SHORT, &hPcrComposite) :
896 Tspi_Context_CreateObject(hContext, TSS_OBJECT_TYPE_PCRS,
897 0, &hPcrComposite);
898 if (result != TSS_SUCCESS)
899 {
900 goto err2;
901 }
902
903 /* Select PCRs */
904 for (pcr = 0; pcr <= this->pcr_max ; pcr++)
905 {
906 if (f == 256)
907 {
908 i++;
909 f = 1;
910 }
911 if (this->pcr_select[i] & f)
912 {
913 DBG2(DBG_TNC, "PCR %02d selected for TPM Quote", pcr);
914 result = use_quote2 ?
915 Tspi_PcrComposite_SelectPcrIndexEx(hPcrComposite, pcr,
916 TSS_PCRS_DIRECTION_RELEASE) :
917 Tspi_PcrComposite_SelectPcrIndex(hPcrComposite, pcr);
918 if (result != TSS_SUCCESS)
919 {
920 goto err3;
921 }
922 }
923 f <<= 1;
924 }
925
926 /* Set the Validation Data */
927 valData.ulExternalDataLength = this->secret.len;
928 valData.rgbExternalData = (BYTE *)this->secret.ptr;
929
930
931 /* TPM Quote */
932 result = use_quote2 ?
933 Tspi_TPM_Quote2(hTPM, hAIK, FALSE, hPcrComposite, &valData,
934 &versionInfoSize, &versionInfo):
935 Tspi_TPM_Quote(hTPM, hAIK, hPcrComposite, &valData);
936 if (result != TSS_SUCCESS)
937 {
938 goto err4;
939 }
940
941 /* Set output chunks */
942 *pcr_comp = chunk_alloc(HASH_SIZE_SHA1);
943
944 if (use_quote2)
945 {
946 /* TPM_Composite_Hash is last 20 bytes of TPM_Quote_Info2 structure */
947 memcpy(pcr_comp->ptr, valData.rgbData + valData.ulDataLength - HASH_SIZE_SHA1,
948 HASH_SIZE_SHA1);
949 }
950 else
951 {
952 /* TPM_Composite_Hash is 8-28th bytes of TPM_Quote_Info structure */
953 memcpy(pcr_comp->ptr, valData.rgbData + 8, HASH_SIZE_SHA1);
954 }
955 DBG3(DBG_PTS, "Hash of PCR Composite: %#B", pcr_comp);
956
957 quote_info = chunk_create(valData.rgbData, valData.ulDataLength);
958 DBG3(DBG_PTS, "TPM Quote Info: %B",&quote_info);
959
960 *quote_sig = chunk_clone(chunk_create(valData.rgbValidationData,
961 valData.ulValidationDataLength));
962 DBG3(DBG_PTS, "TPM Quote Signature: %B",quote_sig);
963
964 success = TRUE;
965
966 /* Cleanup */
967 err4:
968 Tspi_Context_FreeMemory(hContext, NULL);
969
970 err3:
971 Tspi_Context_CloseObject(hContext, hPcrComposite);
972
973 err2:
974 Tspi_Context_CloseObject(hContext, hAIK);
975
976 err1:
977 Tspi_Context_Close(hContext);
978
979 if (!success)
980 {
981 DBG1(DBG_PTS, "TPM not available: tss error 0x%x", result);
982 }
983 clear_pcrs(this);
984
985 return success;
986 }
987
988 METHOD(pts_t, select_pcr, bool,
989 private_pts_t *this, u_int32_t pcr)
990 {
991 u_int32_t i, f;
992
993 if (pcr >= PCR_MAX_NUM)
994 {
995 DBG1(DBG_PTS, "PCR %u: number is larger than maximum of %u",
996 pcr, PCR_MAX_NUM-1);
997 return FALSE;
998 }
999
1000 /* Determine PCR selection flag */
1001 i = pcr / 8;
1002 f = 1 << (pcr - 8*i);
1003
1004 /* Has this PCR already been selected? */
1005 if (!(this->pcr_select[i] & f))
1006 {
1007 this->pcr_select[i] |= f;
1008 this->pcr_max = max(this->pcr_max, pcr);
1009 this->pcr_count++;
1010 }
1011
1012 return TRUE;
1013 }
1014
1015 METHOD(pts_t, add_pcr, bool,
1016 private_pts_t *this, u_int32_t pcr, chunk_t pcr_before, chunk_t pcr_after)
1017 {
1018 if (pcr >= PCR_MAX_NUM)
1019 {
1020 DBG1(DBG_PTS, "PCR %u: number is larger than maximum of %u",
1021 pcr, PCR_MAX_NUM-1);
1022 return FALSE;
1023 }
1024
1025 /* Is the length of the PCR registers already set? */
1026 if (this->pcr_len)
1027 {
1028 if (pcr_after.len != this->pcr_len)
1029 {
1030 DBG1(DBG_PTS, "PCR %02u: length is %d bytes but should be %d bytes",
1031 pcr_after.len, this->pcr_len);
1032 return FALSE;
1033 }
1034 }
1035 else
1036 {
1037 this->pcr_len = pcr_after.len;
1038 }
1039
1040 /* Has the value of the PCR register already been assigned? */
1041 if (this->pcrs[pcr])
1042 {
1043 if (!memeq(this->pcrs[pcr], pcr_before.ptr, this->pcr_len))
1044 {
1045 DBG1(DBG_PTS, "PCR %02u: new pcr_before value does not equal "
1046 "old pcr_after value");
1047 }
1048 /* remove the old PCR value */
1049 free(this->pcrs[pcr]);
1050 }
1051 else
1052 {
1053 /* add extended PCR Register */
1054 this->pcr_select[pcr / 8] |= 1 << (pcr % 8);
1055 this->pcr_max = max(this->pcr_max, pcr);
1056 this->pcr_count++;
1057 }
1058
1059 /* Duplicate and store current PCR value */
1060 pcr_after = chunk_clone(pcr_after);
1061 this->pcrs[pcr] = pcr_after.ptr;
1062
1063 return TRUE;
1064 }
1065
1066 METHOD(pts_t, does_pcr_value_match, bool,
1067 private_pts_t *this, chunk_t pcr_after_value)
1068 {
1069 enumerator_t *e;
1070 pcr_entry_t *entry;
1071
1072 if (!this->pcrs)
1073 {
1074 this->pcrs = linked_list_create();
1075 }
1076
1077 e = this->pcrs->create_enumerator(this->pcrs);
1078 while (e->enumerate(e, &entry))
1079 {
1080 if (entry->pcr_number == new->pcr_number)
1081 {
1082 DBG4(DBG_PTS, "updating already added PCR%d value",
1083 entry->pcr_number);
1084 this->pcrs->remove_at(this->pcrs, e);
1085 free(entry);
1086 break;
1087 }
1088 }
1089 DESTROY_IF(e);
1090 this->pcrs->insert_last(this->pcrs, new);
1091 }
1092
1093 /**
1094 * TPM_QUOTE_INFO structure:
1095 * 4 bytes of version
1096 * 4 bytes 'Q' 'U' 'O' 'T'
1097 * 20 byte SHA1 of TCPA_PCR_COMPOSITE
1098 * 20 byte nonce
1099 *
1100 * TPM_QUOTE_INFO2 structure:
1101 * 2 bytes Tag 0x0036 TPM_Tag_Quote_info2
1102 * 4 bytes 'Q' 'U' 'T' '2'
1103 * 20 bytes nonce
1104 * 26 bytes PCR_INFO_SHORT
1105 */
1106
1107 METHOD(pts_t, get_quote_info, bool,
1108 private_pts_t *this, bool use_quote2, bool use_ver_info,
1109 pts_meas_algorithms_t comp_hash_algo,
1110 chunk_t *out_pcr_comp, chunk_t *out_quote_info)
1111 {
1112 u_int8_t size_of_select;
1113 int pcr_comp_len, i;
1114 chunk_t pcr_comp, hash_pcr_comp;
1115 bio_writer_t *writer;
1116 hasher_t *hasher;
1117
1118 if (this->pcr_count == 0)
1119 {
1120 DBG1(DBG_PTS, "No extended PCR entries available, "
1121 "unable to construct TPM Quote Info");
1122 return FALSE;
1123 }
1124 if (!this->secret.ptr)
1125 {
1126 DBG1(DBG_PTS, "Secret assessment value unavailable, ",
1127 "unable to construct TPM Quote Info");
1128 return FALSE;
1129 }
1130 if (use_quote2 && use_ver_info && !this->tpm_version_info.ptr)
1131 {
1132 DBG1(DBG_PTS, "TPM Version Information unavailable, ",
1133 "unable to construct TPM Quote Info2");
1134 return FALSE;
1135 }
1136
1137 size_of_select = 1 + this->pcr_max / 8;
1138 pcr_comp_len = 2 + size_of_select + 4 + this->pcr_count * this->pcr_len;
1139
1140 writer = bio_writer_create(pcr_comp_len);
1141
1142 writer->write_uint16(writer, size_of_select);
1143 for (i = 0; i < size_of_select; i++)
1144 {
1145 writer->write_uint8(writer, this->pcr_select[i]);
1146 }
1147
1148 writer->write_uint32(writer, this->pcr_count * this->pcr_len);
1149 for (i = 0; i < 8 * size_of_select; i++)
1150 {
1151 if (this->pcrs[i])
1152 {
1153 writer->write_data(writer, chunk_create(this->pcrs[i], this->pcr_len));
1154 }
1155 }
1156 pcr_comp = chunk_clone(writer->get_buf(writer));
1157 DBG3(DBG_PTS, "constructed PCR Composite: %B", &pcr_comp);
1158
1159 writer->destroy(writer);
1160
1161 /* Output the TPM_PCR_COMPOSITE expected from IMC */
1162 if (comp_hash_algo)
1163 {
1164 hash_algorithm_t algo;
1165
1166 algo = pts_meas_algo_to_hash(comp_hash_algo);
1167 hasher = lib->crypto->create_hasher(lib->crypto, algo);
1168
1169 /* Hash the PCR Composite Structure */
1170 hasher->allocate_hash(hasher, pcr_comp, out_pcr_comp);
1171 DBG3(DBG_PTS, "constructed PCR Composite hash: %#B", out_pcr_comp);
1172 hasher->destroy(hasher);
1173 }
1174 else
1175 {
1176 *out_pcr_comp = chunk_clone(pcr_comp);
1177 }
1178
1179 /* SHA1 hash of PCR Composite to construct TPM_QUOTE_INFO */
1180 hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
1181 hasher->allocate_hash(hasher, pcr_comp, &hash_pcr_comp);
1182 hasher->destroy(hasher);
1183
1184 writer->write_data(writer, hash_pcr_composite);
1185 chunk_clear(&pcr_composite);
1186 chunk_clear(&hash_pcr_composite);
1187
1188 /* Hash the PCR Composite Structure */
1189 hasher->allocate_hash(hasher, pcr_composite, out_pcr_composite);
1190 DBG4(DBG_PTS, "Hash of calculated PCR Composite: %B", out_pcr_composite);
1191 hasher->destroy(hasher);
1192 }
1193 else
1194 {
1195 *out_pcr_composite = chunk_clone(pcr_composite);
1196 DBG3(DBG_PTS, "calculated PCR Composite: %B", out_pcr_composite);
1197 }
1198
1199 /* SHA1 hash of PCR Composite to construct TPM_QUOTE_INFO */
1200 hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
1201 hasher->allocate_hash(hasher, pcr_composite, &hash_pcr_composite);
1202 hasher->destroy(hasher);
1203
1204 /* Construct TPM_QUOTE_INFO/TPM_QUOTE_INFO2 structure */
1205 writer = bio_writer_create(TPM_QUOTE_INFO_LEN);
1206
1207 if (use_quote2)
1208 {
1209 /* TPM Structure Tag */
1210 writer->write_uint16(writer, TPM_TAG_QUOTE_INFO2);
1211
1212 /* Magic QUT2 value */
1213 writer->write_data(writer, chunk_create("QUT2", 4));
1214
1215 /* Secret assessment value 20 bytes (nonce) */
1216 writer->write_data(writer, this->secret);
1217
1218 /* Length of the PCR selection field */
1219 writer->write_uint16(writer, size_of_select);
1220
1221 /* PCR selection */
1222 for (i = 0; i < size_of_select ; i++)
1223 {
1224 writer->write_uint8(writer, this->pcr_select[i]);
1225 }
1226
1227 /* TPM Locality Selection */
1228 writer->write_uint8(writer, TPM_LOC_ZERO);
1229
1230 /* PCR Composite Hash */
1231 writer->write_data(writer, hash_pcr_comp);
1232
1233 if (use_ver_info)
1234 {
1235 /* TPM version Info */
1236 writer->write_data(writer, this->tpm_version_info);
1237 }
1238 }
1239 else
1240 {
1241 /* Version number */
1242 writer->write_data(writer, chunk_from_chars(1, 1, 0, 0));
1243
1244 /* Magic QUOT value */
1245 writer->write_data(writer, chunk_create("QUOT", 4));
1246
1247 /* PCR Composite Hash */
1248 writer->write_data(writer, hash_pcr_comp);
1249
1250 /* Secret assessment value 20 bytes (nonce) */
1251 writer->write_data(writer, this->secret);
1252 }
1253
1254 /* TPM Quote Info */
1255 *out_quote_info = chunk_clone(writer->get_buf(writer));
1256 DBG3(DBG_PTS, "constructed TPM Quote Info: %B", out_quote_info);
1257
1258 writer->destroy(writer);
1259 free(pcr_comp.ptr);
1260 free(hash_pcr_comp.ptr);
1261 clear_pcrs(this);
1262
1263 return TRUE;
1264 }
1265
1266 METHOD(pts_t, verify_quote_signature, bool,
1267 private_pts_t *this, chunk_t data, chunk_t signature)
1268 {
1269 public_key_t *aik_pub_key;
1270
1271 aik_pub_key = this->aik->get_public_key(this->aik);
1272 if (!aik_pub_key)
1273 {
1274 DBG1(DBG_PTS, "failed to get public key from AIK certificate");
1275 return FALSE;
1276 }
1277
1278 if (!aik_pub_key->verify(aik_pub_key, SIGN_RSA_EMSA_PKCS1_SHA1,
1279 data, signature))
1280 {
1281 DBG1(DBG_PTS, "signature verification failed for TPM Quote Info");
1282 DESTROY_IF(aik_pub_key);
1283 return FALSE;
1284 }
1285 */
1286
1287 if (!aik_pub_key->get_encoding(aik_pub_key,
1288 PUBKEY_SPKI_ASN1_DER, &key_encoding))
1289 {
1290 DBG1(DBG_PTS, "failed to get encoding of AIK public key");
1291 goto cleanup;
1292 }
1293
1294 aik_pub_key->destroy(aik_pub_key);
1295 return TRUE;
1296 }
1297
1298 METHOD(pts_t, destroy, void,
1299 private_pts_t *this)
1300 {
1301 clear_pcrs(this);
1302 DESTROY_IF(this->aik);
1303 DESTROY_IF(this->dh);
1304 free(this->initiator_nonce.ptr);
1305 free(this->responder_nonce.ptr);
1306 free(this->secret.ptr);
1307 free(this->platform_info);
1308 free(this->aik_blob.ptr);
1309 free(this->tpm_version_info.ptr);
1310 free(this);
1311 }
1312
1313 /**
1314 * Determine Linux distribution and hardware platform
1315 */
1316 static char* extract_platform_info(void)
1317 {
1318 FILE *file;
1319 char buf[BUF_LEN], *pos, *value = NULL;
1320 int i, len;
1321 struct utsname uninfo;
1322
1323 /* Linux/Unix distribution release info (from http://linuxmafia.com) */
1324 const char* releases[] = {
1325 "/etc/lsb-release", "/etc/debian_version",
1326 "/etc/SuSE-release", "/etc/novell-release",
1327 "/etc/sles-release", "/etc/redhat-release",
1328 "/etc/fedora-release", "/etc/gentoo-release",
1329 "/etc/slackware-version", "/etc/annvix-release",
1330 "/etc/arch-release", "/etc/arklinux-release",
1331 "/etc/aurox-release", "/etc/blackcat-release",
1332 "/etc/cobalt-release", "/etc/conectiva-release",
1333 "/etc/debian_release", "/etc/immunix-release",
1334 "/etc/lfs-release", "/etc/linuxppc-release",
1335 "/etc/mandrake-release", "/etc/mandriva-release",
1336 "/etc/mandrakelinux-release", "/etc/mklinux-release",
1337 "/etc/pld-release", "/etc/redhat_version",
1338 "/etc/slackware-release", "/etc/e-smith-release",
1339 "/etc/release", "/etc/sun-release",
1340 "/etc/tinysofa-release", "/etc/turbolinux-release",
1341 "/etc/ultrapenguin-release", "/etc/UnitedLinux-release",
1342 "/etc/va-release", "/etc/yellowdog-release"
1343 };
1344
1345 const char description[] = "DISTRIB_DESCRIPTION=\"";
1346
1347 for (i = 0; i < countof(releases); i++)
1348 {
1349 file = fopen(releases[i], "r");
1350 if (!file)
1351 {
1352 continue;
1353 }
1354 fseek(file, 0, SEEK_END);
1355 len = min(ftell(file), sizeof(buf)-1);
1356 rewind(file);
1357 buf[len] = '\0';
1358 if (fread(buf, 1, len, file) != len)
1359 {
1360 DBG1(DBG_PTS, "failed to read file '%s'", releases[i]);
1361 fclose(file);
1362 return NULL;
1363 }
1364 fclose(file);
1365
1366 if (i == 0) /* LSB release */
1367 {
1368 pos = strstr(buf, description);
1369 if (!pos)
1370 {
1371 DBG1(DBG_PTS, "failed to find begin of lsb-release "
1372 "DESCRIPTION field");
1373 return NULL;
1374 }
1375 value = pos + strlen(description);
1376 pos = strchr(value, '"');
1377 if (!pos)
1378 {
1379 DBG1(DBG_PTS, "failed to find end of lsb-release "
1380 "DESCRIPTION field");
1381 return NULL;
1382 }
1383 }
1384 else
1385 {
1386 value = buf;
1387 pos = strchr(value, '\n');
1388 if (!pos)
1389 {
1390 DBG1(DBG_PTS, "failed to find end of release string");
1391 return NULL;
1392 }
1393 }
1394 break;
1395 }
1396
1397 if (!value)
1398 {
1399 DBG1(DBG_PTS, "no distribution release file found");
1400 return NULL;
1401 }
1402
1403 if (uname(&uninfo) < 0)
1404 {
1405 DBG1(DBG_PTS, "could not retrieve machine architecture");
1406 return NULL;
1407 }
1408
1409 *pos++ = ' ';
1410 len = sizeof(buf)-1 + (pos - buf);
1411 strncpy(pos, uninfo.machine, len);
1412
1413 DBG1(DBG_PTS, "platform is '%s'", value);
1414 return strdup(value);
1415 }
1416
1417 /**
1418 * Check for a TPM by querying for TPM Version Info
1419 */
1420 static bool has_tpm(private_pts_t *this)
1421 {
1422 TSS_HCONTEXT hContext;
1423 TSS_HTPM hTPM;
1424 TSS_RESULT result;
1425 u_int32_t version_info_len;
1426
1427 result = Tspi_Context_Create(&hContext);
1428 if (result != TSS_SUCCESS)
1429 {
1430 DBG1(DBG_PTS, "TPM context could not be created: tss error 0x%x",
1431 result);
1432 return FALSE;
1433 }
1434 result = Tspi_Context_Connect(hContext, NULL);
1435 if (result != TSS_SUCCESS)
1436 {
1437 goto err;
1438 }
1439 result = Tspi_Context_GetTpmObject (hContext, &hTPM);
1440 if (result != TSS_SUCCESS)
1441 {
1442 goto err;
1443 }
1444 result = Tspi_TPM_GetCapability(hTPM, TSS_TPMCAP_VERSION_VAL, 0, NULL,
1445 &version_info_len,
1446 &this->tpm_version_info.ptr);
1447 this->tpm_version_info.len = version_info_len;
1448 if (result != TSS_SUCCESS)
1449 {
1450 goto err;
1451 }
1452 this->tpm_version_info = chunk_clone(this->tpm_version_info);
1453
1454 Tspi_Context_FreeMemory(hContext, NULL);
1455 Tspi_Context_Close(hContext);
1456 return TRUE;
1457
1458 err:
1459 DBG1(DBG_PTS, "TPM not available: tss error 0x%x", result);
1460 Tspi_Context_FreeMemory(hContext, NULL);
1461 Tspi_Context_Close(hContext);
1462 return FALSE;
1463 }
1464
1465 /**
1466 * See header
1467 */
1468 pts_t *pts_create(bool is_imc)
1469 {
1470 private_pts_t *this;
1471
1472 INIT(this,
1473 .public = {
1474 .get_proto_caps = _get_proto_caps,
1475 .set_proto_caps = _set_proto_caps,
1476 .get_meas_algorithm = _get_meas_algorithm,
1477 .set_meas_algorithm = _set_meas_algorithm,
1478 .get_dh_hash_algorithm = _get_dh_hash_algorithm,
1479 .set_dh_hash_algorithm = _set_dh_hash_algorithm,
1480 .create_dh_nonce = _create_dh_nonce,
1481 .get_my_public_value = _get_my_public_value,
1482 .set_peer_public_value = _set_peer_public_value,
1483 .calculate_secret = _calculate_secret,
1484 .get_platform_info = _get_platform_info,
1485 .set_platform_info = _set_platform_info,
1486 .get_tpm_version_info = _get_tpm_version_info,
1487 .set_tpm_version_info = _set_tpm_version_info,
1488 .get_aik = _get_aik,
1489 .set_aik = _set_aik,
1490 .is_path_valid = _is_path_valid,
1491 .hash_file = _hash_file,
1492 .do_measurements = _do_measurements,
1493 .get_metadata = _get_metadata,
1494 .read_pcr = _read_pcr,
1495 .extend_pcr = _extend_pcr,
1496 .quote_tpm = _quote_tpm,
1497 .select_pcr = _select_pcr,
1498 .add_pcr = _add_pcr,
1499 .get_quote_info = _get_quote_info,
1500 .verify_quote_signature = _verify_quote_signature,
1501 .destroy = _destroy,
1502 },
1503 .is_imc = is_imc,
1504 .proto_caps = PTS_PROTO_CAPS_V,
1505 .algorithm = PTS_MEAS_ALGO_SHA256,
1506 .dh_hash_algorithm = PTS_MEAS_ALGO_SHA256,
1507 );
1508
1509 if (is_imc)
1510 {
1511 this->platform_info = extract_platform_info();
1512
1513 if (has_tpm(this))
1514 {
1515 this->has_tpm = TRUE;
1516 this->proto_caps |= PTS_PROTO_CAPS_T | PTS_PROTO_CAPS_D;
1517 load_aik(this);
1518 load_aik_blob(this);
1519 }
1520 }
1521 else
1522 {
1523 this->proto_caps |= PTS_PROTO_CAPS_T | PTS_PROTO_CAPS_D;
1524 }
1525
1526 return &this->public;
1527 }