c2d3d7d72a0fdfa1c71088d63265e8fef8231334
[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 *output)
717 {
718 TSS_HCONTEXT hContext;
719 TSS_HTPM hTPM;
720 TSS_RESULT result;
721 u_int32_t pcr_length;
722 chunk_t pcr_value;
723
724 result = Tspi_Context_Create(&hContext);
725 if (result != TSS_SUCCESS)
726 {
727 DBG1(DBG_PTS, "TPM context could not be created: tss error 0x%x",
728 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 pcr_value = chunk_alloc(PCR_LEN);
743 result = Tspi_TPM_PcrRead(hTPM, pcr_num, &pcr_length, &pcr_value.ptr);
744 if (result != TSS_SUCCESS)
745 {
746 goto err;
747 }
748
749 *output = pcr_value;
750 *output = chunk_clone(*output);
751
752 chunk_clear(&pcr_value);
753 DBG3(DBG_PTS, "PCR %d value:%B", pcr_num, output);
754 Tspi_Context_Close(hContext);
755 return TRUE;
756
757 err:
758 chunk_clear(&pcr_value);
759 DBG1(DBG_PTS, "TPM not available: tss error 0x%x", result);
760 Tspi_Context_Close(hContext);
761 return FALSE;
762 }
763
764 METHOD(pts_t, extend_pcr, bool,
765 private_pts_t *this, u_int32_t pcr_num, chunk_t input, chunk_t *output)
766 {
767 TSS_HCONTEXT hContext;
768 TSS_HTPM hTPM;
769 TSS_RESULT result;
770 u_int32_t pcr_length;
771 chunk_t pcr_value;
772
773 result = Tspi_Context_Create(&hContext);
774 if (result != TSS_SUCCESS)
775 {
776 DBG1(DBG_PTS, "TPM context could not be created: tss error 0x%x",
777 result);
778 return FALSE;
779 }
780 result = Tspi_Context_Connect(hContext, NULL);
781 if (result != TSS_SUCCESS)
782 {
783 goto err;
784 }
785 result = Tspi_Context_GetTpmObject (hContext, &hTPM);
786 if (result != TSS_SUCCESS)
787 {
788 goto err;
789 }
790
791 pcr_value = chunk_alloc(PCR_LEN);
792 result = Tspi_TPM_PcrExtend(hTPM, pcr_num, PCR_LEN, input.ptr,
793 NULL, &pcr_length, &pcr_value.ptr);
794 if (result != TSS_SUCCESS)
795 {
796 goto err;
797 }
798
799 *output = pcr_value;
800 *output = chunk_clone(*output);
801
802 chunk_clear(&pcr_value);
803 Tspi_Context_Close(hContext);
804 DBG3(DBG_PTS, "PCR %d extended with: %B", pcr_num, &input);
805 DBG3(DBG_PTS, "PCR %d value after extend: %B", pcr_num, output);
806 return TRUE;
807
808 err:
809 chunk_clear(&pcr_value);
810 DBG1(DBG_PTS, "TPM not available: tss error 0x%x", result);
811 Tspi_Context_Close(hContext);
812 return FALSE;
813 }
814
815
816 static void clear_pcrs(private_pts_t *this)
817 {
818 int i;
819
820 for (i = 0; i <= this->pcr_max; i++)
821 {
822 free(this->pcrs[i]);
823 this->pcrs[i] = NULL;
824 }
825 this->pcr_count = 0;
826 this->pcr_max = 0;
827
828 memset(this->pcr_select, 0x00, sizeof(this->pcr_select));
829 }
830
831 METHOD(pts_t, quote_tpm, bool,
832 private_pts_t *this, bool use_quote2, chunk_t *pcr_comp, chunk_t *quote_sig)
833 {
834 TSS_HCONTEXT hContext;
835 TSS_HTPM hTPM;
836 TSS_HKEY hAIK;
837 TSS_HKEY hSRK;
838 TSS_HPOLICY srkUsagePolicy;
839 TSS_UUID SRK_UUID = TSS_UUID_SRK;
840 BYTE secret[] = TSS_WELL_KNOWN_SECRET;
841 TSS_HPCRS hPcrComposite;
842 TSS_VALIDATION valData;
843 TSS_RESULT result;
844 chunk_t quote_info;
845 BYTE* versionInfo;
846 u_int32_t versionInfoSize, pcr, i = 0, f = 1;
847 bool success = FALSE;
848
849 result = Tspi_Context_Create(&hContext);
850 if (result != TSS_SUCCESS)
851 {
852 DBG1(DBG_PTS, "TPM context could not be created: tss error 0x%x",
853 result);
854 return FALSE;
855 }
856 result = Tspi_Context_Connect(hContext, NULL);
857 if (result != TSS_SUCCESS)
858 {
859 goto err1;
860 }
861 result = Tspi_Context_GetTpmObject (hContext, &hTPM);
862 if (result != TSS_SUCCESS)
863 {
864 goto err1;
865 }
866
867 /* Retrieve SRK from TPM and set the authentication to well known secret*/
868 result = Tspi_Context_LoadKeyByUUID(hContext, TSS_PS_TYPE_SYSTEM,
869 SRK_UUID, &hSRK);
870 if (result != TSS_SUCCESS)
871 {
872 goto err1;
873 }
874
875 result = Tspi_GetPolicyObject(hSRK, TSS_POLICY_USAGE, &srkUsagePolicy);
876 if (result != TSS_SUCCESS)
877 {
878 goto err1;
879 }
880 result = Tspi_Policy_SetSecret(srkUsagePolicy, TSS_SECRET_MODE_SHA1,
881 20, secret);
882 if (result != TSS_SUCCESS)
883 {
884 goto err1;
885 }
886
887 result = Tspi_Context_LoadKeyByBlob (hContext, hSRK, this->aik_blob.len,
888 this->aik_blob.ptr, &hAIK);
889 if (result != TSS_SUCCESS)
890 {
891 goto err1;
892 }
893
894 /* Create PCR composite object */
895 result = use_quote2 ?
896 Tspi_Context_CreateObject(hContext, TSS_OBJECT_TYPE_PCRS,
897 TSS_PCRS_STRUCT_INFO_SHORT, &hPcrComposite) :
898 Tspi_Context_CreateObject(hContext, TSS_OBJECT_TYPE_PCRS,
899 0, &hPcrComposite);
900 if (result != TSS_SUCCESS)
901 {
902 goto err2;
903 }
904
905 /* Select PCRs */
906 for (pcr = 0; pcr <= this->pcr_max ; pcr++)
907 {
908 if (f == 256)
909 {
910 i++;
911 f = 1;
912 }
913 if (this->pcr_select[i] & f)
914 {
915 DBG2(DBG_TNC, "PCR %02d selected for TPM Quote", pcr);
916 result = use_quote2 ?
917 Tspi_PcrComposite_SelectPcrIndexEx(hPcrComposite, pcr,
918 TSS_PCRS_DIRECTION_RELEASE) :
919 Tspi_PcrComposite_SelectPcrIndex(hPcrComposite, pcr);
920 if (result != TSS_SUCCESS)
921 {
922 goto err3;
923 }
924 }
925 f <<= 1;
926 }
927
928 /* Set the Validation Data */
929 valData.ulExternalDataLength = this->secret.len;
930 valData.rgbExternalData = (BYTE *)this->secret.ptr;
931
932
933 /* TPM Quote */
934 result = use_quote2 ?
935 Tspi_TPM_Quote2(hTPM, hAIK, FALSE, hPcrComposite, &valData,
936 &versionInfoSize,&versionInfo):
937 Tspi_TPM_Quote(hTPM, hAIK, hPcrComposite, &valData);
938 if (result != TSS_SUCCESS)
939 {
940 goto err4;
941 }
942
943 /* Set output chunks */
944 *pcr_comp = chunk_alloc(HASH_SIZE_SHA1);
945
946 if (use_quote2)
947 {
948 /* TPM_Composite_Hash is last 20 bytes of TPM_Quote_Info2 structure */
949 memcpy(pcr_comp->ptr, valData.rgbData + valData.ulDataLength - HASH_SIZE_SHA1,
950 HASH_SIZE_SHA1);
951 }
952 else
953 {
954 /* TPM_Composite_Hash is 8-28th bytes of TPM_Quote_Info structure */
955 memcpy(pcr_comp->ptr, valData.rgbData + 8, HASH_SIZE_SHA1);
956 }
957 DBG3(DBG_PTS, "Hash of PCR Composite: %#B", pcr_comp);
958
959 quote_info = chunk_create(valData.rgbData, valData.ulDataLength);
960 DBG3(DBG_PTS, "TPM Quote Info: %B",&quote_info);
961
962 *quote_sig = chunk_clone(chunk_create(valData.rgbValidationData,
963 valData.ulValidationDataLength));
964 DBG3(DBG_PTS, "TPM Quote Signature: %B",quote_sig);
965
966 success = TRUE;
967
968 /* Cleanup */
969 err4:
970 Tspi_Context_FreeMemory(hContext, NULL);
971
972 err3:
973 Tspi_Context_CloseObject(hContext, hPcrComposite);
974
975 err2:
976 Tspi_Context_CloseObject(hContext, hAIK);
977
978 err1:
979 Tspi_Context_Close(hContext);
980
981 if (!success)
982 {
983 DBG1(DBG_PTS, "TPM not available: tss error 0x%x", result);
984 }
985 clear_pcrs(this);
986
987 return success;
988 }
989
990 METHOD(pts_t, select_pcr, bool,
991 private_pts_t *this, u_int32_t pcr)
992 {
993 u_int32_t i, f;
994
995 if (pcr >= PCR_MAX_NUM)
996 {
997 DBG1(DBG_PTS, "PCR %u: number is larger than maximum of %u",
998 pcr, PCR_MAX_NUM-1);
999 return FALSE;
1000 }
1001
1002 /* Determine PCR selection flag */
1003 i = pcr / 8;
1004 f = 1 << (pcr - 8*i);
1005
1006 /* Has this PCR already been selected? */
1007 if (!(this->pcr_select[i] & f))
1008 {
1009 this->pcr_select[i] |= f;
1010 this->pcr_max = max(this->pcr_max, pcr);
1011 this->pcr_count++;
1012 }
1013
1014 return TRUE;
1015 }
1016
1017 METHOD(pts_t, add_pcr, bool,
1018 private_pts_t *this, u_int32_t pcr, chunk_t pcr_before, chunk_t pcr_after)
1019 {
1020 if (pcr >= PCR_MAX_NUM)
1021 {
1022 DBG1(DBG_PTS, "PCR %u: number is larger than maximum of %u",
1023 pcr, PCR_MAX_NUM-1);
1024 return FALSE;
1025 }
1026
1027 /* Is the length of the PCR registers already set? */
1028 if (this->pcr_len)
1029 {
1030 if (pcr_after.len != this->pcr_len)
1031 {
1032 DBG1(DBG_PTS, "PCR %02u: length is %d bytes but should be %d bytes",
1033 pcr_after.len, this->pcr_len);
1034 return FALSE;
1035 }
1036 }
1037 else
1038 {
1039 this->pcr_len = pcr_after.len;
1040 }
1041
1042 /* Has the value of the PCR register already been assigned? */
1043 if (this->pcrs[pcr])
1044 {
1045 if (!memeq(this->pcrs[pcr], pcr_before.ptr, this->pcr_len))
1046 {
1047 DBG1(DBG_PTS, "PCR %02u: new pcr_before value does not equal "
1048 "old pcr_after value");
1049 }
1050 /* remove the old PCR value */
1051 free(this->pcrs[pcr]);
1052 }
1053 else
1054 {
1055 /* add extended PCR Register */
1056 this->pcr_select[pcr / 8] |= 1 << (pcr % 8);
1057 this->pcr_max = max(this->pcr_max, pcr);
1058 this->pcr_count++;
1059 }
1060
1061 /* Duplicate and store current PCR value */
1062 pcr_after = chunk_clone(pcr_after);
1063 this->pcrs[pcr] = pcr_after.ptr;
1064
1065 return TRUE;
1066 }
1067
1068 METHOD(pts_t, does_pcr_value_match, bool,
1069 private_pts_t *this, chunk_t pcr_after_value)
1070 {
1071 enumerator_t *e;
1072 pcr_entry_t *entry;
1073
1074 if (!this->pcrs)
1075 {
1076 this->pcrs = linked_list_create();
1077 }
1078
1079 e = this->pcrs->create_enumerator(this->pcrs);
1080 while (e->enumerate(e, &entry))
1081 {
1082 if (entry->pcr_number == new->pcr_number)
1083 {
1084 DBG4(DBG_PTS, "updating already added PCR%d value",
1085 entry->pcr_number);
1086 this->pcrs->remove_at(this->pcrs, e);
1087 free(entry);
1088 break;
1089 }
1090 }
1091 DESTROY_IF(e);
1092 this->pcrs->insert_last(this->pcrs, new);
1093 }
1094
1095 /**
1096 * TPM_QUOTE_INFO structure:
1097 * 4 bytes of version
1098 * 4 bytes 'Q' 'U' 'O' 'T'
1099 * 20 byte SHA1 of TCPA_PCR_COMPOSITE
1100 * 20 byte nonce
1101 *
1102 * TPM_QUOTE_INFO2 structure:
1103 * 2 bytes Tag 0x0036 TPM_Tag_Quote_info2
1104 * 4 bytes 'Q' 'U' 'T' '2'
1105 * 20 bytes nonce
1106 * 26 bytes PCR_INFO_SHORT
1107 */
1108
1109 METHOD(pts_t, get_quote_info, bool,
1110 private_pts_t *this, bool use_quote2, bool use_ver_info,
1111 pts_meas_algorithms_t comp_hash_algo,
1112 chunk_t *out_pcr_comp, chunk_t *out_quote_info)
1113 {
1114 u_int8_t size_of_select;
1115 int pcr_comp_len, i;
1116 chunk_t pcr_comp, hash_pcr_comp;
1117 bio_writer_t *writer;
1118 hasher_t *hasher;
1119
1120 if (this->pcr_count == 0)
1121 {
1122 DBG1(DBG_PTS, "No extended PCR entries available, "
1123 "unable to construct TPM Quote Info");
1124 return FALSE;
1125 }
1126 if (!this->secret.ptr)
1127 {
1128 DBG1(DBG_PTS, "Secret assessment value unavailable, ",
1129 "unable to construct TPM Quote Info");
1130 return FALSE;
1131 }
1132 if (use_quote2 && use_ver_info && !this->tpm_version_info.ptr)
1133 {
1134 DBG1(DBG_PTS, "TPM Version Information unavailable, ",
1135 "unable to construct TPM Quote Info2");
1136 return FALSE;
1137 }
1138
1139 size_of_select = 1 + this->pcr_max / 8;
1140 pcr_comp_len = 2 + size_of_select + 4 + this->pcr_count * this->pcr_len;
1141
1142 writer = bio_writer_create(pcr_comp_len);
1143
1144 writer->write_uint16(writer, size_of_select);
1145 for (i = 0; i < size_of_select; i++)
1146 {
1147 writer->write_uint8(writer, this->pcr_select[i]);
1148 }
1149
1150 writer->write_uint32(writer, this->pcr_count * this->pcr_len);
1151 for (i = 0; i < 8 * size_of_select; i++)
1152 {
1153 if (this->pcrs[i])
1154 {
1155 writer->write_data(writer, chunk_create(this->pcrs[i], this->pcr_len));
1156 }
1157 }
1158 pcr_comp = chunk_clone(writer->get_buf(writer));
1159 DBG3(DBG_PTS, "constructed PCR Composite: %B", &pcr_comp);
1160
1161 writer->destroy(writer);
1162
1163 /* Output the TPM_PCR_COMPOSITE expected from IMC */
1164 if (comp_hash_algo)
1165 {
1166 hash_algorithm_t algo;
1167
1168 algo = pts_meas_algo_to_hash(comp_hash_algo);
1169 hasher = lib->crypto->create_hasher(lib->crypto, algo);
1170
1171 /* Hash the PCR Composite Structure */
1172 hasher->allocate_hash(hasher, pcr_comp, out_pcr_comp);
1173 DBG3(DBG_PTS, "constructed PCR Composite hash: %#B", out_pcr_comp);
1174 hasher->destroy(hasher);
1175 }
1176 else
1177 {
1178 *out_pcr_comp = chunk_clone(pcr_comp);
1179 }
1180
1181 /* SHA1 hash of PCR Composite to construct TPM_QUOTE_INFO */
1182 hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
1183 hasher->allocate_hash(hasher, pcr_comp, &hash_pcr_comp);
1184 hasher->destroy(hasher);
1185
1186 writer->write_data(writer, hash_pcr_composite);
1187 chunk_clear(&pcr_composite);
1188 chunk_clear(&hash_pcr_composite);
1189
1190 /* Hash the PCR Composite Structure */
1191 hasher->allocate_hash(hasher, pcr_composite, out_pcr_composite);
1192 DBG4(DBG_PTS, "Hash of calculated PCR Composite: %B", out_pcr_composite);
1193 hasher->destroy(hasher);
1194 }
1195 else
1196 {
1197 *out_pcr_composite = chunk_clone(pcr_composite);
1198 DBG3(DBG_PTS, "calculated PCR Composite: %B", out_pcr_composite);
1199 }
1200
1201 /* SHA1 hash of PCR Composite to construct TPM_QUOTE_INFO */
1202 hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
1203 hasher->allocate_hash(hasher, pcr_composite, &hash_pcr_composite);
1204 hasher->destroy(hasher);
1205
1206 /* Construct TPM_QUOTE_INFO/TPM_QUOTE_INFO2 structure */
1207 writer = bio_writer_create(TPM_QUOTE_INFO_LEN);
1208
1209 if (use_quote2)
1210 {
1211 /* TPM Structure Tag */
1212 writer->write_uint16(writer, TPM_TAG_QUOTE_INFO2);
1213
1214 /* Magic QUT2 value */
1215 writer->write_data(writer, chunk_create("QUT2", 4));
1216
1217 /* Secret assessment value 20 bytes (nonce) */
1218 writer->write_data(writer, this->secret);
1219
1220 /* Length of the PCR selection field */
1221 writer->write_uint16(writer, size_of_select);
1222
1223 /* PCR selection */
1224 for (i = 0; i < size_of_select ; i++)
1225 {
1226 writer->write_uint8(writer, this->pcr_select[i]);
1227 }
1228
1229 /* TPM Locality Selection */
1230 writer->write_uint8(writer, TPM_LOC_ZERO);
1231
1232 /* PCR Composite Hash */
1233 writer->write_data(writer, hash_pcr_comp);
1234
1235 if (use_ver_info)
1236 {
1237 /* TPM version Info */
1238 writer->write_data(writer, this->tpm_version_info);
1239 }
1240 }
1241 else
1242 {
1243 /* Version number */
1244 writer->write_data(writer, chunk_from_chars(1, 1, 0, 0));
1245
1246 /* Magic QUOT value */
1247 writer->write_data(writer, chunk_create("QUOT", 4));
1248
1249 /* PCR Composite Hash */
1250 writer->write_data(writer, hash_pcr_comp);
1251
1252 /* Secret assessment value 20 bytes (nonce) */
1253 writer->write_data(writer, this->secret);
1254 }
1255
1256 /* TPM Quote Info */
1257 *out_quote_info = chunk_clone(writer->get_buf(writer));
1258 DBG3(DBG_PTS, "constructed TPM Quote Info: %B", out_quote_info);
1259
1260 writer->destroy(writer);
1261 free(pcr_comp.ptr);
1262 free(hash_pcr_comp.ptr);
1263 clear_pcrs(this);
1264
1265 return TRUE;
1266 }
1267
1268 METHOD(pts_t, verify_quote_signature, bool,
1269 private_pts_t *this, chunk_t data, chunk_t signature)
1270 {
1271 public_key_t *aik_pub_key;
1272
1273 aik_pub_key = this->aik->get_public_key(this->aik);
1274 if (!aik_pub_key)
1275 {
1276 DBG1(DBG_PTS, "failed to get public key from AIK certificate");
1277 return FALSE;
1278 }
1279
1280 if (!aik_pub_key->verify(aik_pub_key, SIGN_RSA_EMSA_PKCS1_SHA1,
1281 data, signature))
1282 {
1283 DBG1(DBG_PTS, "signature verification failed for TPM Quote Info");
1284 DESTROY_IF(aik_pub_key);
1285 return FALSE;
1286 }
1287 */
1288
1289 if (!aik_pub_key->get_encoding(aik_pub_key,
1290 PUBKEY_SPKI_ASN1_DER, &key_encoding))
1291 {
1292 DBG1(DBG_PTS, "failed to get encoding of AIK public key");
1293 goto cleanup;
1294 }
1295
1296 aik_pub_key->destroy(aik_pub_key);
1297 return TRUE;
1298 }
1299
1300 METHOD(pts_t, destroy, void,
1301 private_pts_t *this)
1302 {
1303 clear_pcrs(this);
1304 DESTROY_IF(this->aik);
1305 DESTROY_IF(this->dh);
1306 free(this->initiator_nonce.ptr);
1307 free(this->responder_nonce.ptr);
1308 free(this->secret.ptr);
1309 free(this->platform_info);
1310 free(this->aik_blob.ptr);
1311 free(this->tpm_version_info.ptr);
1312 free(this);
1313 }
1314
1315 /**
1316 * Determine Linux distribution and hardware platform
1317 */
1318 static char* extract_platform_info(void)
1319 {
1320 FILE *file;
1321 char buf[BUF_LEN], *pos, *value = NULL;
1322 int i, len;
1323 struct utsname uninfo;
1324
1325 /* Linux/Unix distribution release info (from http://linuxmafia.com) */
1326 const char* releases[] = {
1327 "/etc/lsb-release", "/etc/debian_version",
1328 "/etc/SuSE-release", "/etc/novell-release",
1329 "/etc/sles-release", "/etc/redhat-release",
1330 "/etc/fedora-release", "/etc/gentoo-release",
1331 "/etc/slackware-version", "/etc/annvix-release",
1332 "/etc/arch-release", "/etc/arklinux-release",
1333 "/etc/aurox-release", "/etc/blackcat-release",
1334 "/etc/cobalt-release", "/etc/conectiva-release",
1335 "/etc/debian_release", "/etc/immunix-release",
1336 "/etc/lfs-release", "/etc/linuxppc-release",
1337 "/etc/mandrake-release", "/etc/mandriva-release",
1338 "/etc/mandrakelinux-release", "/etc/mklinux-release",
1339 "/etc/pld-release", "/etc/redhat_version",
1340 "/etc/slackware-release", "/etc/e-smith-release",
1341 "/etc/release", "/etc/sun-release",
1342 "/etc/tinysofa-release", "/etc/turbolinux-release",
1343 "/etc/ultrapenguin-release", "/etc/UnitedLinux-release",
1344 "/etc/va-release", "/etc/yellowdog-release"
1345 };
1346
1347 const char description[] = "DISTRIB_DESCRIPTION=\"";
1348
1349 for (i = 0; i < countof(releases); i++)
1350 {
1351 file = fopen(releases[i], "r");
1352 if (!file)
1353 {
1354 continue;
1355 }
1356 fseek(file, 0, SEEK_END);
1357 len = min(ftell(file), sizeof(buf)-1);
1358 rewind(file);
1359 buf[len] = '\0';
1360 if (fread(buf, 1, len, file) != len)
1361 {
1362 DBG1(DBG_PTS, "failed to read file '%s'", releases[i]);
1363 fclose(file);
1364 return NULL;
1365 }
1366 fclose(file);
1367
1368 if (i == 0) /* LSB release */
1369 {
1370 pos = strstr(buf, description);
1371 if (!pos)
1372 {
1373 DBG1(DBG_PTS, "failed to find begin of lsb-release "
1374 "DESCRIPTION field");
1375 return NULL;
1376 }
1377 value = pos + strlen(description);
1378 pos = strchr(value, '"');
1379 if (!pos)
1380 {
1381 DBG1(DBG_PTS, "failed to find end of lsb-release "
1382 "DESCRIPTION field");
1383 return NULL;
1384 }
1385 }
1386 else
1387 {
1388 value = buf;
1389 pos = strchr(value, '\n');
1390 if (!pos)
1391 {
1392 DBG1(DBG_PTS, "failed to find end of release string");
1393 return NULL;
1394 }
1395 }
1396 break;
1397 }
1398
1399 if (!value)
1400 {
1401 DBG1(DBG_PTS, "no distribution release file found");
1402 return NULL;
1403 }
1404
1405 if (uname(&uninfo) < 0)
1406 {
1407 DBG1(DBG_PTS, "could not retrieve machine architecture");
1408 return NULL;
1409 }
1410
1411 *pos++ = ' ';
1412 len = sizeof(buf)-1 + (pos - buf);
1413 strncpy(pos, uninfo.machine, len);
1414
1415 DBG1(DBG_PTS, "platform is '%s'", value);
1416 return strdup(value);
1417 }
1418
1419 /**
1420 * Check for a TPM by querying for TPM Version Info
1421 */
1422 static bool has_tpm(private_pts_t *this)
1423 {
1424 TSS_HCONTEXT hContext;
1425 TSS_HTPM hTPM;
1426 TSS_RESULT result;
1427 u_int32_t version_info_len;
1428
1429 result = Tspi_Context_Create(&hContext);
1430 if (result != TSS_SUCCESS)
1431 {
1432 DBG1(DBG_PTS, "TPM context could not be created: tss error 0x%x",
1433 result);
1434 return FALSE;
1435 }
1436 result = Tspi_Context_Connect(hContext, NULL);
1437 if (result != TSS_SUCCESS)
1438 {
1439 goto err;
1440 }
1441 result = Tspi_Context_GetTpmObject (hContext, &hTPM);
1442 if (result != TSS_SUCCESS)
1443 {
1444 goto err;
1445 }
1446 result = Tspi_TPM_GetCapability(hTPM, TSS_TPMCAP_VERSION_VAL, 0, NULL,
1447 &version_info_len,
1448 &this->tpm_version_info.ptr);
1449 this->tpm_version_info.len = version_info_len;
1450 if (result != TSS_SUCCESS)
1451 {
1452 goto err;
1453 }
1454 this->tpm_version_info = chunk_clone(this->tpm_version_info);
1455
1456 Tspi_Context_FreeMemory(hContext, NULL);
1457 Tspi_Context_Close(hContext);
1458 return TRUE;
1459
1460 err:
1461 DBG1(DBG_PTS, "TPM not available: tss error 0x%x", result);
1462 Tspi_Context_FreeMemory(hContext, NULL);
1463 Tspi_Context_Close(hContext);
1464 return FALSE;
1465 }
1466
1467 /**
1468 * See header
1469 */
1470 pts_t *pts_create(bool is_imc)
1471 {
1472 private_pts_t *this;
1473
1474 INIT(this,
1475 .public = {
1476 .get_proto_caps = _get_proto_caps,
1477 .set_proto_caps = _set_proto_caps,
1478 .get_meas_algorithm = _get_meas_algorithm,
1479 .set_meas_algorithm = _set_meas_algorithm,
1480 .get_dh_hash_algorithm = _get_dh_hash_algorithm,
1481 .set_dh_hash_algorithm = _set_dh_hash_algorithm,
1482 .create_dh_nonce = _create_dh_nonce,
1483 .get_my_public_value = _get_my_public_value,
1484 .set_peer_public_value = _set_peer_public_value,
1485 .calculate_secret = _calculate_secret,
1486 .get_platform_info = _get_platform_info,
1487 .set_platform_info = _set_platform_info,
1488 .get_tpm_version_info = _get_tpm_version_info,
1489 .set_tpm_version_info = _set_tpm_version_info,
1490 .get_aik = _get_aik,
1491 .set_aik = _set_aik,
1492 .is_path_valid = _is_path_valid,
1493 .hash_file = _hash_file,
1494 .do_measurements = _do_measurements,
1495 .get_metadata = _get_metadata,
1496 .read_pcr = _read_pcr,
1497 .extend_pcr = _extend_pcr,
1498 .quote_tpm = _quote_tpm,
1499 .select_pcr = _select_pcr,
1500 .add_pcr = _add_pcr,
1501 .get_quote_info = _get_quote_info,
1502 .verify_quote_signature = _verify_quote_signature,
1503 .destroy = _destroy,
1504 },
1505 .is_imc = is_imc,
1506 .proto_caps = PTS_PROTO_CAPS_V,
1507 .algorithm = PTS_MEAS_ALGO_SHA256,
1508 .dh_hash_algorithm = PTS_MEAS_ALGO_SHA256,
1509 );
1510
1511 if (is_imc)
1512 {
1513 this->platform_info = extract_platform_info();
1514
1515 if (has_tpm(this))
1516 {
1517 this->has_tpm = TRUE;
1518 this->proto_caps |= PTS_PROTO_CAPS_T | PTS_PROTO_CAPS_D;
1519 load_aik(this);
1520 load_aik_blob(this);
1521 }
1522 }
1523 else
1524 {
1525 this->proto_caps |= PTS_PROTO_CAPS_T | PTS_PROTO_CAPS_D;
1526 }
1527
1528 return &this->public;
1529 }