differences incurred by rebasing - thanks Linus
[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 /**
33 * Maximum number of PCR's of TPM, TPM Spec 1.2
34 */
35 #define PCR_MAX_NUM 24
36
37 /**
38 * Number of bytes that can be saved in a PCR of TPM, TPM Spec 1.2
39 */
40 #define PCR_LEN 20
41
42 typedef struct private_pts_t private_pts_t;
43
44 /**
45 * Private data of a pts_t object.
46 *
47 */
48 struct private_pts_t {
49
50 /**
51 * Public pts_t interface.
52 */
53 pts_t public;
54
55 /**
56 * PTS Protocol Capabilities
57 */
58 pts_proto_caps_flag_t proto_caps;
59
60 /**
61 * PTS Measurement Algorithm
62 */
63 pts_meas_algorithms_t algorithm;
64
65 /**
66 * DH Hash Algorithm
67 */
68 pts_meas_algorithms_t dh_hash_algorithm;
69
70 /**
71 * PTS Diffie-Hellman Secret
72 */
73 diffie_hellman_t *dh;
74
75 /**
76 * PTS Diffie-Hellman Initiator Nonce
77 */
78 chunk_t initiator_nonce;
79
80 /**
81 * PTS Diffie-Hellman Responder Nonce
82 */
83 chunk_t responder_nonce;
84
85 /**
86 * Secret assessment value to be used for TPM Quote as an external data
87 */
88 chunk_t secret;
89
90 /**
91 * Platform and OS Info
92 */
93 char *platform_info;
94
95 /**
96 * TRUE if IMC-PTS, FALSE if IMV-PTS
97 */
98 bool is_imc;
99
100 /**
101 * Do we have an activated TPM
102 */
103 bool has_tpm;
104
105 /**
106 * Contains a TPM_CAP_VERSION_INFO struct
107 */
108 chunk_t tpm_version_info;
109
110 /**
111 * Contains TSS Blob structure for AIK
112 */
113 chunk_t aik_blob;
114
115 /**
116 * Contains a Attestation Identity Key or Certificate
117 */
118 certificate_t *aik;
119
120 /**
121 * Table of extended PCRs with corresponding values
122 */
123 u_char* pcrs[PCR_MAX_NUM];
124
125 /**
126 * Length of PCR registers
127 */
128 size_t pcr_len;
129
130 /**
131 * Number of extended PCR registers
132 */
133 u_int32_t pcr_count;
134
135 /**
136 * Highest extended PCR register
137 */
138 u_int32_t pcr_max;
139
140 /**
141 * Bitmap of extended PCR registers
142 */
143 u_int8_t pcr_select[PCR_MAX_NUM / 8];
144
145 };
146
147 METHOD(pts_t, get_proto_caps, pts_proto_caps_flag_t,
148 private_pts_t *this)
149 {
150 return this->proto_caps;
151 }
152
153 METHOD(pts_t, set_proto_caps, void,
154 private_pts_t *this, pts_proto_caps_flag_t flags)
155 {
156 this->proto_caps = flags;
157 DBG2(DBG_PTS, "supported PTS protocol capabilities: %s%s%s%s%s",
158 flags & PTS_PROTO_CAPS_C ? "C" : ".",
159 flags & PTS_PROTO_CAPS_V ? "V" : ".",
160 flags & PTS_PROTO_CAPS_D ? "D" : ".",
161 flags & PTS_PROTO_CAPS_T ? "T" : ".",
162 flags & PTS_PROTO_CAPS_X ? "X" : ".");
163 }
164
165 METHOD(pts_t, get_meas_algorithm, pts_meas_algorithms_t,
166 private_pts_t *this)
167 {
168 return this->algorithm;
169 }
170
171 METHOD(pts_t, set_meas_algorithm, void,
172 private_pts_t *this, pts_meas_algorithms_t algorithm)
173 {
174 hash_algorithm_t hash_alg;
175
176 hash_alg = pts_meas_algo_to_hash(algorithm);
177 DBG2(DBG_PTS, "selected PTS measurement algorithm is %N",
178 hash_algorithm_names, hash_alg);
179 if (hash_alg != HASH_UNKNOWN)
180 {
181 this->algorithm = algorithm;
182 }
183 }
184
185 METHOD(pts_t, get_dh_hash_algorithm, pts_meas_algorithms_t,
186 private_pts_t *this)
187 {
188 return this->dh_hash_algorithm;
189 }
190
191 METHOD(pts_t, set_dh_hash_algorithm, void,
192 private_pts_t *this, pts_meas_algorithms_t algorithm)
193 {
194 hash_algorithm_t hash_alg;
195
196 hash_alg = pts_meas_algo_to_hash(algorithm);
197 DBG2(DBG_PTS, "selected DH hash algorithm is %N",
198 hash_algorithm_names, hash_alg);
199 if (hash_alg != HASH_UNKNOWN)
200 {
201 this->dh_hash_algorithm = algorithm;
202 }
203 }
204
205
206 METHOD(pts_t, create_dh_nonce, bool,
207 private_pts_t *this, pts_dh_group_t group, int nonce_len)
208 {
209 diffie_hellman_group_t dh_group;
210 chunk_t *nonce;
211 rng_t *rng;
212
213 dh_group = pts_dh_group_to_ike(group);
214 DBG2(DBG_PTS, "selected PTS DH group is %N",
215 diffie_hellman_group_names, dh_group);
216 DESTROY_IF(this->dh);
217 this->dh = lib->crypto->create_dh(lib->crypto, dh_group);
218
219 rng = lib->crypto->create_rng(lib->crypto, RNG_STRONG);
220 if (!rng)
221 {
222 DBG1(DBG_PTS, "no rng available");
223 return FALSE;
224 }
225 DBG2(DBG_PTS, "nonce length is %d", nonce_len);
226 nonce = this->is_imc ? &this->responder_nonce : &this->initiator_nonce;
227 chunk_free(nonce);
228 rng->allocate_bytes(rng, nonce_len, nonce);
229 rng->destroy(rng);
230
231 return TRUE;
232 }
233
234 METHOD(pts_t, get_my_public_value, void,
235 private_pts_t *this, chunk_t *value, chunk_t *nonce)
236 {
237 this->dh->get_my_public_value(this->dh, value);
238 *nonce = this->is_imc ? this->responder_nonce : this->initiator_nonce;
239 }
240
241 METHOD(pts_t, set_peer_public_value, void,
242 private_pts_t *this, chunk_t value, chunk_t nonce)
243 {
244 this->dh->set_other_public_value(this->dh, value);
245
246 nonce = chunk_clone(nonce);
247 if (this->is_imc)
248 {
249 this->initiator_nonce = nonce;
250 }
251 else
252 {
253 this->responder_nonce = nonce;
254 }
255 }
256
257 METHOD(pts_t, calculate_secret, bool,
258 private_pts_t *this)
259 {
260 hasher_t *hasher;
261 hash_algorithm_t hash_alg;
262 chunk_t shared_secret;
263
264 /* Check presence of nonces */
265 if (!this->initiator_nonce.len || !this->responder_nonce.len)
266 {
267 DBG1(DBG_PTS, "initiator and/or responder nonce is not available");
268 return FALSE;
269 }
270 DBG3(DBG_PTS, "initiator nonce: %B", &this->initiator_nonce);
271 DBG3(DBG_PTS, "responder nonce: %B", &this->responder_nonce);
272
273 /* Calculate the DH secret */
274 if (this->dh->get_shared_secret(this->dh, &shared_secret) != SUCCESS)
275 {
276 DBG1(DBG_PTS, "shared DH secret computation failed");
277 return FALSE;
278 }
279 DBG3(DBG_PTS, "shared DH secret: %B", &shared_secret);
280
281 /* Calculate the secret assessment value */
282 hash_alg = pts_meas_algo_to_hash(this->dh_hash_algorithm);
283 hasher = lib->crypto->create_hasher(lib->crypto, hash_alg);
284
285 hasher->allocate_hash(hasher, chunk_from_chars('1'), NULL);
286 hasher->allocate_hash(hasher, this->initiator_nonce, NULL);
287 hasher->allocate_hash(hasher, this->responder_nonce, NULL);
288 hasher->allocate_hash(hasher, shared_secret, &this->secret);
289 hasher->destroy(hasher);
290
291 /* The DH secret must be destroyed */
292 chunk_clear(&shared_secret);
293
294 /*
295 * Truncate the hash to 20 bytes to fit the ExternalData
296 * argument of the TPM Quote command
297 */
298 this->secret.len = min(this->secret.len, 20);
299 DBG3(DBG_PTS, "secret assessment value: %B", &this->secret);
300 return TRUE;
301 }
302
303 /**
304 * Print TPM 1.2 Version Info
305 */
306 static void print_tpm_version_info(private_pts_t *this)
307 {
308 TPM_CAP_VERSION_INFO versionInfo;
309 UINT64 offset = 0;
310 TSS_RESULT result;
311
312 result = Trspi_UnloadBlob_CAP_VERSION_INFO(&offset,
313 this->tpm_version_info.ptr, &versionInfo);
314 if (result != TSS_SUCCESS)
315 {
316 DBG1(DBG_PTS, "could not parse tpm version info: tss error 0x%x",
317 result);
318 }
319 else
320 {
321 DBG2(DBG_PTS, "TPM 1.2 Version Info: Chip Version: %hhu.%hhu.%hhu.%hhu,"
322 " Spec Level: %hu, Errata Rev: %hhu, Vendor ID: %.4s",
323 versionInfo.version.major, versionInfo.version.minor,
324 versionInfo.version.revMajor, versionInfo.version.revMinor,
325 versionInfo.specLevel, versionInfo.errataRev,
326 versionInfo.tpmVendorID);
327 }
328 }
329
330 METHOD(pts_t, get_platform_info, char*,
331 private_pts_t *this)
332 {
333 return this->platform_info;
334 }
335
336 METHOD(pts_t, set_platform_info, void,
337 private_pts_t *this, char *info)
338 {
339 free(this->platform_info);
340 this->platform_info = strdup(info);
341 }
342
343 METHOD(pts_t, get_tpm_version_info, bool,
344 private_pts_t *this, chunk_t *info)
345 {
346 if (!this->has_tpm)
347 {
348 return FALSE;
349 }
350 *info = this->tpm_version_info;
351 print_tpm_version_info(this);
352 return TRUE;
353 }
354
355 METHOD(pts_t, set_tpm_version_info, void,
356 private_pts_t *this, chunk_t info)
357 {
358 this->tpm_version_info = chunk_clone(info);
359 print_tpm_version_info(this);
360 }
361
362 METHOD(pts_t, get_pcr_len, size_t,
363 private_pts_t *this)
364 {
365 return this->pcr_len;
366 }
367
368 /**
369 * Load an AIK Blob (TSS_TSPATTRIB_KEYBLOB_BLOB attribute)
370 */
371 static void load_aik_blob(private_pts_t *this)
372 {
373 char *blob_path;
374 FILE *fp;
375 u_int32_t aikBlobLen;
376
377 blob_path = lib->settings->get_str(lib->settings,
378 "libimcv.plugins.imc-attestation.aik_blob", NULL);
379
380 if (blob_path)
381 {
382 /* Read aik key blob from a file */
383 if ((fp = fopen(blob_path, "r")) == NULL)
384 {
385 DBG1(DBG_PTS, "unable to open AIK Blob file: %s", blob_path);
386 return;
387 }
388
389 fseek(fp, 0, SEEK_END);
390 aikBlobLen = ftell(fp);
391 fseek(fp, 0L, SEEK_SET);
392
393 this->aik_blob = chunk_alloc(aikBlobLen);
394 if (fread(this->aik_blob.ptr, 1, aikBlobLen, fp))
395 {
396 DBG2(DBG_PTS, "loaded AIK Blob from '%s'", blob_path);
397 DBG3(DBG_PTS, "AIK Blob: %B", &this->aik_blob);
398 }
399 else
400 {
401 DBG1(DBG_PTS, "unable to read AIK Blob file '%s'", blob_path);
402 }
403 fclose(fp);
404 return;
405 }
406
407 DBG1(DBG_PTS, "AIK Blob is not available");
408 }
409
410 /**
411 * Load an AIK certificate or public key
412 * the certificate having precedence over the public key if both are present
413 */
414 static void load_aik(private_pts_t *this)
415 {
416 char *cert_path, *key_path;
417
418 cert_path = lib->settings->get_str(lib->settings,
419 "libimcv.plugins.imc-attestation.aik_cert", NULL);
420 key_path = lib->settings->get_str(lib->settings,
421 "libimcv.plugins.imc-attestation.aik_key", NULL);
422
423 if (cert_path)
424 {
425 this->aik = lib->creds->create(lib->creds, CRED_CERTIFICATE,
426 CERT_X509, BUILD_FROM_FILE,
427 cert_path, BUILD_END);
428 if (this->aik)
429 {
430 DBG2(DBG_PTS, "loaded AIK certificate from '%s'", cert_path);
431 return;
432 }
433 }
434 if (key_path)
435 {
436 this->aik = lib->creds->create(lib->creds, CRED_CERTIFICATE,
437 CERT_TRUSTED_PUBKEY, BUILD_FROM_FILE,
438 key_path, BUILD_END);
439 if (this->aik)
440 {
441 DBG2(DBG_PTS, "loaded AIK public key from '%s'", key_path);
442 return;
443 }
444 }
445
446 DBG1(DBG_PTS, "neither AIK certificate nor public key is available");
447 }
448
449 METHOD(pts_t, get_aik, certificate_t*,
450 private_pts_t *this)
451 {
452 return this->aik;
453 }
454
455 METHOD(pts_t, set_aik, void,
456 private_pts_t *this, certificate_t *aik)
457 {
458 DESTROY_IF(this->aik);
459 this->aik = aik->get_ref(aik);
460 }
461
462 METHOD(pts_t, get_aik_keyid, bool,
463 private_pts_t *this, chunk_t *keyid)
464 {
465 public_key_t *public;
466 bool success;
467
468 if (!this->aik)
469 {
470 DBG1(DBG_PTS, "no AIK certificate available");
471 return FALSE;
472 }
473 public = this->aik->get_public_key(this->aik);
474 if (!public)
475 {
476 DBG1(DBG_PTS, "no AIK public key available");
477 return FALSE;
478 }
479 success = public->get_fingerprint(public, KEYID_PUBKEY_INFO_SHA1, keyid);
480 if (!success)
481 {
482 DBG1(DBG_PTS, "no SHA-1 AIK public key info ID available");
483 }
484 public->destroy(public);
485
486 return success;
487 }
488
489 METHOD(pts_t, hash_file, bool,
490 private_pts_t *this, hasher_t *hasher, char *pathname, u_char *hash)
491 {
492 u_char buffer[PTS_BUF_SIZE];
493 FILE *file;
494 int bytes_read;
495
496 file = fopen(pathname, "rb");
497 if (!file)
498 {
499 DBG1(DBG_PTS," file '%s' can not be opened, %s", pathname,
500 strerror(errno));
501 return FALSE;
502 }
503 while (TRUE)
504 {
505 bytes_read = fread(buffer, 1, sizeof(buffer), file);
506 if (bytes_read > 0)
507 {
508 hasher->get_hash(hasher, chunk_create(buffer, bytes_read), NULL);
509 }
510 else
511 {
512 hasher->get_hash(hasher, chunk_empty, hash);
513 break;
514 }
515 }
516 fclose(file);
517
518 return TRUE;
519 }
520
521 /**
522 * Get the relative filename of a fully qualified file pathname
523 */
524 static char* get_filename(char *pathname)
525 {
526 char *pos, *filename;
527
528 pos = filename = pathname;
529 while (pos && *(++pos) != '\0')
530 {
531 filename = pos;
532 pos = strchr(filename, '/');
533 }
534 return filename;
535 }
536
537 METHOD(pts_t, is_path_valid, bool,
538 private_pts_t *this, char *path, pts_error_code_t *error_code)
539 {
540 struct stat st;
541
542 *error_code = 0;
543
544 if (!stat(path, &st))
545 {
546 return TRUE;
547 }
548 else if (errno == ENOENT || errno == ENOTDIR)
549 {
550 DBG1(DBG_PTS, "file/directory does not exist %s", path);
551 *error_code = TCG_PTS_FILE_NOT_FOUND;
552 }
553 else if (errno == EFAULT)
554 {
555 DBG1(DBG_PTS, "bad address %s", path);
556 *error_code = TCG_PTS_INVALID_PATH;
557 }
558 else
559 {
560 DBG1(DBG_PTS, "error: %s occured while validating path: %s",
561 strerror(errno), path);
562 return FALSE;
563 }
564
565 return TRUE;
566 }
567
568 METHOD(pts_t, do_measurements, pts_file_meas_t*,
569 private_pts_t *this, u_int16_t request_id, char *pathname, bool is_directory)
570 {
571 hasher_t *hasher;
572 hash_algorithm_t hash_alg;
573 u_char hash[HASH_SIZE_SHA384];
574 chunk_t measurement;
575 pts_file_meas_t *measurements;
576
577 /* Create a hasher */
578 hash_alg = pts_meas_algo_to_hash(this->algorithm);
579 hasher = lib->crypto->create_hasher(lib->crypto, hash_alg);
580 if (!hasher)
581 {
582 DBG1(DBG_PTS, "hasher %N not available", hash_algorithm_names, hash_alg);
583 return NULL;
584 }
585
586 /* Create a measurement object */
587 measurements = pts_file_meas_create(request_id);
588
589 /* Link the hash to the measurement and set the measurement length */
590 measurement = chunk_create(hash, hasher->get_hash_size(hasher));
591
592 if (is_directory)
593 {
594 enumerator_t *enumerator;
595 char *rel_name, *abs_name;
596 struct stat st;
597
598 enumerator = enumerator_create_directory(pathname);
599 if (!enumerator)
600 {
601 DBG1(DBG_PTS," directory '%s' can not be opened, %s", pathname,
602 strerror(errno));
603 hasher->destroy(hasher);
604 measurements->destroy(measurements);
605 return NULL;
606 }
607 while (enumerator->enumerate(enumerator, &rel_name, &abs_name, &st))
608 {
609 /* measure regular files only */
610 if (S_ISREG(st.st_mode) && *rel_name != '.')
611 {
612 if (!hash_file(this, hasher, abs_name, hash))
613 {
614 enumerator->destroy(enumerator);
615 hasher->destroy(hasher);
616 measurements->destroy(measurements);
617 return NULL;
618 }
619 DBG2(DBG_PTS, " %#B for '%s'", &measurement, rel_name);
620 measurements->add(measurements, rel_name, measurement);
621 }
622 }
623 enumerator->destroy(enumerator);
624 }
625 else
626 {
627 char *filename;
628
629 if (!hash_file(this, hasher, pathname, hash))
630 {
631 hasher->destroy(hasher);
632 measurements->destroy(measurements);
633 return NULL;
634 }
635 filename = get_filename(pathname);
636 DBG2(DBG_PTS, " %#B for '%s'", &measurement, filename);
637 measurements->add(measurements, filename, measurement);
638 }
639 hasher->destroy(hasher);
640
641 return measurements;
642 }
643
644 /**
645 * Obtain statistical information describing a file
646 */
647 static bool file_metadata(char *pathname, pts_file_metadata_t **entry)
648 {
649 struct stat st;
650 pts_file_metadata_t *this;
651
652 this = malloc_thing(pts_file_metadata_t);
653
654 if (stat(pathname, &st))
655 {
656 DBG1(DBG_PTS, "unable to obtain statistics about '%s'", pathname);
657 return FALSE;
658 }
659
660 if (S_ISREG(st.st_mode))
661 {
662 this->type = PTS_FILE_REGULAR;
663 }
664 else if (S_ISDIR(st.st_mode))
665 {
666 this->type = PTS_FILE_DIRECTORY;
667 }
668 else if (S_ISCHR(st.st_mode))
669 {
670 this->type = PTS_FILE_CHAR_SPEC;
671 }
672 else if (S_ISBLK(st.st_mode))
673 {
674 this->type = PTS_FILE_BLOCK_SPEC;
675 }
676 else if (S_ISFIFO(st.st_mode))
677 {
678 this->type = PTS_FILE_FIFO;
679 }
680 else if (S_ISLNK(st.st_mode))
681 {
682 this->type = PTS_FILE_SYM_LINK;
683 }
684 else if (S_ISSOCK(st.st_mode))
685 {
686 this->type = PTS_FILE_SOCKET;
687 }
688 else
689 {
690 this->type = PTS_FILE_OTHER;
691 }
692
693 this->filesize = st.st_size;
694 this->created = st.st_ctime;
695 this->modified = st.st_mtime;
696 this->accessed = st.st_atime;
697 this->owner = st.st_uid;
698 this->group = st.st_gid;
699
700 *entry = this;
701 return TRUE;
702 }
703
704 METHOD(pts_t, get_metadata, pts_file_meta_t*,
705 private_pts_t *this, char *pathname, bool is_directory)
706 {
707 pts_file_meta_t *metadata;
708 pts_file_metadata_t *entry;
709
710 /* Create a metadata object */
711 metadata = pts_file_meta_create();
712
713 if (is_directory)
714 {
715 enumerator_t *enumerator;
716 char *rel_name, *abs_name;
717 struct stat st;
718
719 enumerator = enumerator_create_directory(pathname);
720 if (!enumerator)
721 {
722 DBG1(DBG_PTS," directory '%s' can not be opened, %s", pathname,
723 strerror(errno));
724 metadata->destroy(metadata);
725 return NULL;
726 }
727 while (enumerator->enumerate(enumerator, &rel_name, &abs_name, &st))
728 {
729 /* measure regular files only */
730 if (S_ISREG(st.st_mode) && *rel_name != '.')
731 {
732 if (!file_metadata(abs_name, &entry))
733 {
734 enumerator->destroy(enumerator);
735 metadata->destroy(metadata);
736 return NULL;
737 }
738 entry->filename = strdup(rel_name);
739 metadata->add(metadata, entry);
740 }
741 }
742 enumerator->destroy(enumerator);
743 }
744 else
745 {
746 if (!file_metadata(pathname, &entry))
747 {
748 metadata->destroy(metadata);
749 return NULL;
750 }
751 entry->filename = strdup(get_filename(pathname));
752 metadata->add(metadata, entry);
753 }
754
755 return metadata;
756 }
757
758 METHOD(pts_t, read_pcr, bool,
759 private_pts_t *this, u_int32_t pcr_num, chunk_t *pcr_value)
760 {
761 TSS_HCONTEXT hContext;
762 TSS_HTPM hTPM;
763 TSS_RESULT result;
764 chunk_t rgbPcrValue;
765
766 bool success = FALSE;
767
768 result = Tspi_Context_Create(&hContext);
769 if (result != TSS_SUCCESS)
770 {
771 DBG1(DBG_PTS, "TPM context could not be created: tss error 0x%x", result);
772 return FALSE;
773 }
774
775 result = Tspi_Context_Connect(hContext, NULL);
776 if (result != TSS_SUCCESS)
777 {
778 goto err;
779 }
780 result = Tspi_Context_GetTpmObject (hContext, &hTPM);
781 if (result != TSS_SUCCESS)
782 {
783 goto err;
784 }
785 result = Tspi_TPM_PcrRead(hTPM, pcr_num, (UINT32*)&rgbPcrValue.len, &rgbPcrValue.ptr);
786 if (result != TSS_SUCCESS)
787 {
788 goto err;
789 }
790 *pcr_value = chunk_clone(rgbPcrValue);
791 DBG3(DBG_PTS, "PCR %d value:%B", pcr_num, pcr_value);
792 success = TRUE;
793
794 err:
795 if (!success)
796 {
797 DBG1(DBG_PTS, "TPM not available: tss error 0x%x", result);
798 }
799 Tspi_Context_FreeMemory(hContext, NULL);
800 Tspi_Context_Close(hContext);
801
802 return success;
803 }
804
805 METHOD(pts_t, extend_pcr, bool,
806 private_pts_t *this, u_int32_t pcr_num, chunk_t input, chunk_t *output)
807 {
808 TSS_HCONTEXT hContext;
809 TSS_HTPM hTPM;
810 TSS_RESULT result;
811 u_int32_t pcr_length;
812 chunk_t pcr_value;
813
814 result = Tspi_Context_Create(&hContext);
815 if (result != TSS_SUCCESS)
816 {
817 DBG1(DBG_PTS, "TPM context could not be created: tss error 0x%x",
818 result);
819 return FALSE;
820 }
821 result = Tspi_Context_Connect(hContext, NULL);
822 if (result != TSS_SUCCESS)
823 {
824 goto err;
825 }
826 result = Tspi_Context_GetTpmObject (hContext, &hTPM);
827 if (result != TSS_SUCCESS)
828 {
829 goto err;
830 }
831
832 pcr_value = chunk_alloc(PCR_LEN);
833 result = Tspi_TPM_PcrExtend(hTPM, pcr_num, PCR_LEN, input.ptr,
834 NULL, &pcr_length, &pcr_value.ptr);
835 if (result != TSS_SUCCESS)
836 {
837 goto err;
838 }
839
840 *output = pcr_value;
841 *output = chunk_clone(*output);
842
843 DBG3(DBG_PTS, "PCR %d extended with: %B", pcr_num, &input);
844 DBG3(DBG_PTS, "PCR %d value after extend: %B", pcr_num, output);
845
846 chunk_clear(&pcr_value);
847 Tspi_Context_FreeMemory(hContext, NULL);
848 Tspi_Context_Close(hContext);
849
850 return TRUE;
851
852 err:
853 DBG1(DBG_PTS, "TPM not available: tss error 0x%x", result);
854
855 chunk_clear(&pcr_value);
856 Tspi_Context_FreeMemory(hContext, NULL);
857 Tspi_Context_Close(hContext);
858
859 return FALSE;
860 }
861
862
863 static void clear_pcrs(private_pts_t *this)
864 {
865 int i;
866
867 for (i = 0; i <= this->pcr_max; i++)
868 {
869 free(this->pcrs[i]);
870 this->pcrs[i] = NULL;
871 }
872 this->pcr_count = 0;
873 this->pcr_max = 0;
874
875 memset(this->pcr_select, 0x00, sizeof(this->pcr_select));
876 }
877
878 METHOD(pts_t, quote_tpm, bool,
879 private_pts_t *this, bool use_quote2, chunk_t *pcr_comp, chunk_t *quote_sig)
880 {
881 TSS_HCONTEXT hContext;
882 TSS_HTPM hTPM;
883 TSS_HKEY hAIK;
884 TSS_HKEY hSRK;
885 TSS_HPOLICY srkUsagePolicy;
886 TSS_UUID SRK_UUID = TSS_UUID_SRK;
887 BYTE secret[] = TSS_WELL_KNOWN_SECRET;
888 TSS_HPCRS hPcrComposite;
889 TSS_VALIDATION valData;
890 TSS_RESULT result;
891 chunk_t quote_info;
892 BYTE* versionInfo;
893 u_int32_t versionInfoSize, pcr, i = 0, f = 1;
894 bool success = FALSE;
895
896 result = Tspi_Context_Create(&hContext);
897 if (result != TSS_SUCCESS)
898 {
899 DBG1(DBG_PTS, "TPM context could not be created: tss error 0x%x",
900 result);
901 return FALSE;
902 }
903 result = Tspi_Context_Connect(hContext, NULL);
904 if (result != TSS_SUCCESS)
905 {
906 goto err1;
907 }
908 result = Tspi_Context_GetTpmObject (hContext, &hTPM);
909 if (result != TSS_SUCCESS)
910 {
911 goto err1;
912 }
913
914 /* Retrieve SRK from TPM and set the authentication to well known secret*/
915 result = Tspi_Context_LoadKeyByUUID(hContext, TSS_PS_TYPE_SYSTEM,
916 SRK_UUID, &hSRK);
917 if (result != TSS_SUCCESS)
918 {
919 goto err1;
920 }
921
922 result = Tspi_GetPolicyObject(hSRK, TSS_POLICY_USAGE, &srkUsagePolicy);
923 if (result != TSS_SUCCESS)
924 {
925 goto err1;
926 }
927 result = Tspi_Policy_SetSecret(srkUsagePolicy, TSS_SECRET_MODE_SHA1,
928 20, secret);
929 if (result != TSS_SUCCESS)
930 {
931 goto err1;
932 }
933
934 result = Tspi_Context_LoadKeyByBlob (hContext, hSRK, this->aik_blob.len,
935 this->aik_blob.ptr, &hAIK);
936 if (result != TSS_SUCCESS)
937 {
938 goto err1;
939 }
940
941 /* Create PCR composite object */
942 result = use_quote2 ?
943 Tspi_Context_CreateObject(hContext, TSS_OBJECT_TYPE_PCRS,
944 TSS_PCRS_STRUCT_INFO_SHORT, &hPcrComposite) :
945 Tspi_Context_CreateObject(hContext, TSS_OBJECT_TYPE_PCRS,
946 0, &hPcrComposite);
947 if (result != TSS_SUCCESS)
948 {
949 goto err2;
950 }
951
952 /* Select PCRs */
953 for (pcr = 0; pcr <= this->pcr_max ; pcr++)
954 {
955 if (f == 256)
956 {
957 i++;
958 f = 1;
959 }
960 if (this->pcr_select[i] & f)
961 {
962 result = use_quote2 ?
963 Tspi_PcrComposite_SelectPcrIndexEx(hPcrComposite, pcr,
964 TSS_PCRS_DIRECTION_RELEASE) :
965 Tspi_PcrComposite_SelectPcrIndex(hPcrComposite, pcr);
966 if (result != TSS_SUCCESS)
967 {
968 goto err3;
969 }
970 }
971 f <<= 1;
972 }
973
974 /* Set the Validation Data */
975 valData.ulExternalDataLength = this->secret.len;
976 valData.rgbExternalData = (BYTE *)this->secret.ptr;
977
978
979 /* TPM Quote */
980 result = use_quote2 ?
981 Tspi_TPM_Quote2(hTPM, hAIK, FALSE, hPcrComposite, &valData,
982 &versionInfoSize, &versionInfo):
983 Tspi_TPM_Quote(hTPM, hAIK, hPcrComposite, &valData);
984 if (result != TSS_SUCCESS)
985 {
986 goto err4;
987 }
988
989 /* Set output chunks */
990 *pcr_comp = chunk_alloc(HASH_SIZE_SHA1);
991
992 if (use_quote2)
993 {
994 /* TPM_Composite_Hash is last 20 bytes of TPM_Quote_Info2 structure */
995 memcpy(pcr_comp->ptr, valData.rgbData + valData.ulDataLength - HASH_SIZE_SHA1,
996 HASH_SIZE_SHA1);
997 }
998 else
999 {
1000 /* TPM_Composite_Hash is 8-28th bytes of TPM_Quote_Info structure */
1001 memcpy(pcr_comp->ptr, valData.rgbData + 8, HASH_SIZE_SHA1);
1002 }
1003 DBG3(DBG_PTS, "Hash of PCR Composite: %#B", pcr_comp);
1004
1005 quote_info = chunk_create(valData.rgbData, valData.ulDataLength);
1006 DBG3(DBG_PTS, "TPM Quote Info: %B",&quote_info);
1007
1008 *quote_sig = chunk_clone(chunk_create(valData.rgbValidationData,
1009 valData.ulValidationDataLength));
1010 DBG3(DBG_PTS, "TPM Quote Signature: %B",quote_sig);
1011
1012 success = TRUE;
1013
1014 /* Cleanup */
1015 err4:
1016 Tspi_Context_FreeMemory(hContext, NULL);
1017
1018 err3:
1019 Tspi_Context_CloseObject(hContext, hPcrComposite);
1020
1021 err2:
1022 Tspi_Context_CloseObject(hContext, hAIK);
1023
1024 err1:
1025 Tspi_Context_Close(hContext);
1026
1027 if (!success)
1028 {
1029 DBG1(DBG_PTS, "TPM not available: tss error 0x%x", result);
1030 }
1031 clear_pcrs(this);
1032
1033 return success;
1034 }
1035
1036 METHOD(pts_t, select_pcr, bool,
1037 private_pts_t *this, u_int32_t pcr)
1038 {
1039 u_int32_t i, f;
1040
1041 if (pcr >= PCR_MAX_NUM)
1042 {
1043 DBG1(DBG_PTS, "PCR %u: number is larger than maximum of %u",
1044 pcr, PCR_MAX_NUM-1);
1045 return FALSE;
1046 }
1047
1048 /* Determine PCR selection flag */
1049 i = pcr / 8;
1050 f = 1 << (pcr - 8*i);
1051
1052 /* Has this PCR already been selected? */
1053 if (!(this->pcr_select[i] & f))
1054 {
1055 this->pcr_select[i] |= f;
1056 this->pcr_max = max(this->pcr_max, pcr);
1057 this->pcr_count++;
1058 }
1059
1060 return TRUE;
1061 }
1062
1063 METHOD(pts_t, add_pcr, bool,
1064 private_pts_t *this, u_int32_t pcr, chunk_t pcr_before, chunk_t pcr_after)
1065 {
1066 if (pcr >= PCR_MAX_NUM)
1067 {
1068 DBG1(DBG_PTS, "PCR %u: number is larger than maximum of %u",
1069 pcr, PCR_MAX_NUM-1);
1070 return FALSE;
1071 }
1072
1073 /* Is the length of the PCR registers already set? */
1074 if (this->pcr_len)
1075 {
1076 if (pcr_after.len != this->pcr_len)
1077 {
1078 DBG1(DBG_PTS, "PCR %02u: length is %d bytes but should be %d bytes",
1079 pcr_after.len, this->pcr_len);
1080 return FALSE;
1081 }
1082 }
1083 else
1084 {
1085 this->pcr_len = pcr_after.len;
1086 }
1087
1088 /* Has the value of the PCR register already been assigned? */
1089 if (this->pcrs[pcr])
1090 {
1091 if (!memeq(this->pcrs[pcr], pcr_before.ptr, this->pcr_len))
1092 {
1093 DBG1(DBG_PTS, "PCR %02u: new pcr_before value does not equal "
1094 "old pcr_after value");
1095 }
1096 /* remove the old PCR value */
1097 free(this->pcrs[pcr]);
1098 }
1099 else
1100 {
1101 /* add extended PCR Register */
1102 this->pcr_select[pcr / 8] |= 1 << (pcr % 8);
1103 this->pcr_max = max(this->pcr_max, pcr);
1104 this->pcr_count++;
1105 }
1106
1107 /* Duplicate and store current PCR value */
1108 pcr_after = chunk_clone(pcr_after);
1109 this->pcrs[pcr] = pcr_after.ptr;
1110
1111 return TRUE;
1112 }
1113
1114 /**
1115 * TPM_QUOTE_INFO structure:
1116 * 4 bytes of version
1117 * 4 bytes 'Q' 'U' 'O' 'T'
1118 * 20 byte SHA1 of TCPA_PCR_COMPOSITE
1119 * 20 byte nonce
1120 *
1121 * TPM_QUOTE_INFO2 structure:
1122 * 2 bytes Tag 0x0036 TPM_Tag_Quote_info2
1123 * 4 bytes 'Q' 'U' 'T' '2'
1124 * 20 bytes nonce
1125 * 26 bytes PCR_INFO_SHORT
1126 */
1127
1128 METHOD(pts_t, get_quote_info, bool,
1129 private_pts_t *this, bool use_quote2, bool use_ver_info,
1130 pts_meas_algorithms_t comp_hash_algo,
1131 chunk_t *out_pcr_comp, chunk_t *out_quote_info)
1132 {
1133 u_int8_t size_of_select;
1134 int pcr_comp_len, i;
1135 chunk_t pcr_comp, hash_pcr_comp;
1136 bio_writer_t *writer;
1137 hasher_t *hasher;
1138
1139 if (this->pcr_count == 0)
1140 {
1141 DBG1(DBG_PTS, "No extended PCR entries available, "
1142 "unable to construct TPM Quote Info");
1143 return FALSE;
1144 }
1145 if (!this->secret.ptr)
1146 {
1147 DBG1(DBG_PTS, "Secret assessment value unavailable, ",
1148 "unable to construct TPM Quote Info");
1149 return FALSE;
1150 }
1151 if (use_quote2 && use_ver_info && !this->tpm_version_info.ptr)
1152 {
1153 DBG1(DBG_PTS, "TPM Version Information unavailable, ",
1154 "unable to construct TPM Quote Info2");
1155 return FALSE;
1156 }
1157
1158 size_of_select = 1 + this->pcr_max / 8;
1159 pcr_comp_len = 2 + size_of_select + 4 + this->pcr_count * this->pcr_len;
1160
1161 writer = bio_writer_create(pcr_comp_len);
1162
1163 writer->write_uint16(writer, size_of_select);
1164 for (i = 0; i < size_of_select; i++)
1165 {
1166 writer->write_uint8(writer, this->pcr_select[i]);
1167 }
1168
1169 writer->write_uint32(writer, this->pcr_count * this->pcr_len);
1170 for (i = 0; i < 8 * size_of_select; i++)
1171 {
1172 if (this->pcrs[i])
1173 {
1174 writer->write_data(writer, chunk_create(this->pcrs[i], this->pcr_len));
1175 }
1176 }
1177 pcr_comp = chunk_clone(writer->get_buf(writer));
1178 DBG3(DBG_PTS, "constructed PCR Composite: %B", &pcr_comp);
1179
1180 writer->destroy(writer);
1181
1182 /* Output the TPM_PCR_COMPOSITE expected from IMC */
1183 if (comp_hash_algo)
1184 {
1185 hash_algorithm_t algo;
1186
1187 algo = pts_meas_algo_to_hash(comp_hash_algo);
1188 hasher = lib->crypto->create_hasher(lib->crypto, algo);
1189
1190 /* Hash the PCR Composite Structure */
1191 hasher->allocate_hash(hasher, pcr_comp, out_pcr_comp);
1192 DBG3(DBG_PTS, "constructed PCR Composite hash: %#B", out_pcr_comp);
1193 hasher->destroy(hasher);
1194 }
1195 else
1196 {
1197 *out_pcr_comp = chunk_clone(pcr_comp);
1198 }
1199
1200 /* SHA1 hash of PCR Composite to construct TPM_QUOTE_INFO */
1201 hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
1202 hasher->allocate_hash(hasher, pcr_comp, &hash_pcr_comp);
1203 hasher->destroy(hasher);
1204
1205 /* Construct TPM_QUOTE_INFO/TPM_QUOTE_INFO2 structure */
1206 writer = bio_writer_create(TPM_QUOTE_INFO_LEN);
1207
1208 if (use_quote2)
1209 {
1210 /* TPM Structure Tag */
1211 writer->write_uint16(writer, TPM_TAG_QUOTE_INFO2);
1212
1213 /* Magic QUT2 value */
1214 writer->write_data(writer, chunk_create("QUT2", 4));
1215
1216 /* Secret assessment value 20 bytes (nonce) */
1217 writer->write_data(writer, this->secret);
1218
1219 /* Length of the PCR selection field */
1220 writer->write_uint16(writer, size_of_select);
1221
1222 /* PCR selection */
1223 for (i = 0; i < size_of_select ; i++)
1224 {
1225 writer->write_uint8(writer, this->pcr_select[i]);
1226 }
1227
1228 /* TPM Locality Selection */
1229 writer->write_uint8(writer, TPM_LOC_ZERO);
1230
1231 /* PCR Composite Hash */
1232 writer->write_data(writer, hash_pcr_comp);
1233
1234 if (use_ver_info)
1235 {
1236 /* TPM version Info */
1237 writer->write_data(writer, this->tpm_version_info);
1238 }
1239 }
1240 else
1241 {
1242 /* Version number */
1243 writer->write_data(writer, chunk_from_chars(1, 1, 0, 0));
1244
1245 /* Magic QUOT value */
1246 writer->write_data(writer, chunk_create("QUOT", 4));
1247
1248 /* PCR Composite Hash */
1249 writer->write_data(writer, hash_pcr_comp);
1250
1251 /* Secret assessment value 20 bytes (nonce) */
1252 writer->write_data(writer, this->secret);
1253 }
1254
1255 /* TPM Quote Info */
1256 *out_quote_info = chunk_clone(writer->get_buf(writer));
1257 DBG3(DBG_PTS, "constructed TPM Quote Info: %B", out_quote_info);
1258
1259 writer->destroy(writer);
1260 free(pcr_comp.ptr);
1261 free(hash_pcr_comp.ptr);
1262 clear_pcrs(this);
1263
1264 return TRUE;
1265 }
1266
1267 METHOD(pts_t, verify_quote_signature, bool,
1268 private_pts_t *this, chunk_t data, chunk_t signature)
1269 {
1270 public_key_t *aik_pub_key;
1271
1272 aik_pub_key = this->aik->get_public_key(this->aik);
1273 if (!aik_pub_key)
1274 {
1275 DBG1(DBG_PTS, "failed to get public key from AIK certificate");
1276 return FALSE;
1277 }
1278
1279 if (!aik_pub_key->verify(aik_pub_key, SIGN_RSA_EMSA_PKCS1_SHA1,
1280 data, signature))
1281 {
1282 DBG1(DBG_PTS, "signature verification failed for TPM Quote Info");
1283 DESTROY_IF(aik_pub_key);
1284 return FALSE;
1285 }
1286
1287 aik_pub_key->destroy(aik_pub_key);
1288 return TRUE;
1289 }
1290
1291 METHOD(pts_t, destroy, void,
1292 private_pts_t *this)
1293 {
1294 clear_pcrs(this);
1295 DESTROY_IF(this->aik);
1296 DESTROY_IF(this->dh);
1297 free(this->initiator_nonce.ptr);
1298 free(this->responder_nonce.ptr);
1299 free(this->secret.ptr);
1300 free(this->platform_info);
1301 free(this->aik_blob.ptr);
1302 free(this->tpm_version_info.ptr);
1303 free(this);
1304 }
1305
1306 /**
1307 * Determine Linux distribution and hardware platform
1308 */
1309 static char* extract_platform_info(void)
1310 {
1311 FILE *file;
1312 char buf[BUF_LEN], *pos, *value = NULL;
1313 int i, len;
1314 struct utsname uninfo;
1315
1316 /* Linux/Unix distribution release info (from http://linuxmafia.com) */
1317 const char* releases[] = {
1318 "/etc/lsb-release", "/etc/debian_version",
1319 "/etc/SuSE-release", "/etc/novell-release",
1320 "/etc/sles-release", "/etc/redhat-release",
1321 "/etc/fedora-release", "/etc/gentoo-release",
1322 "/etc/slackware-version", "/etc/annvix-release",
1323 "/etc/arch-release", "/etc/arklinux-release",
1324 "/etc/aurox-release", "/etc/blackcat-release",
1325 "/etc/cobalt-release", "/etc/conectiva-release",
1326 "/etc/debian_release", "/etc/immunix-release",
1327 "/etc/lfs-release", "/etc/linuxppc-release",
1328 "/etc/mandrake-release", "/etc/mandriva-release",
1329 "/etc/mandrakelinux-release", "/etc/mklinux-release",
1330 "/etc/pld-release", "/etc/redhat_version",
1331 "/etc/slackware-release", "/etc/e-smith-release",
1332 "/etc/release", "/etc/sun-release",
1333 "/etc/tinysofa-release", "/etc/turbolinux-release",
1334 "/etc/ultrapenguin-release", "/etc/UnitedLinux-release",
1335 "/etc/va-release", "/etc/yellowdog-release"
1336 };
1337
1338 const char description[] = "DISTRIB_DESCRIPTION=\"";
1339
1340 for (i = 0; i < countof(releases); i++)
1341 {
1342 file = fopen(releases[i], "r");
1343 if (!file)
1344 {
1345 continue;
1346 }
1347 fseek(file, 0, SEEK_END);
1348 len = min(ftell(file), sizeof(buf)-1);
1349 rewind(file);
1350 buf[len] = '\0';
1351 if (fread(buf, 1, len, file) != len)
1352 {
1353 DBG1(DBG_PTS, "failed to read file '%s'", releases[i]);
1354 fclose(file);
1355 return NULL;
1356 }
1357 fclose(file);
1358
1359 if (i == 0) /* LSB release */
1360 {
1361 pos = strstr(buf, description);
1362 if (!pos)
1363 {
1364 DBG1(DBG_PTS, "failed to find begin of lsb-release "
1365 "DESCRIPTION field");
1366 return NULL;
1367 }
1368 value = pos + strlen(description);
1369 pos = strchr(value, '"');
1370 if (!pos)
1371 {
1372 DBG1(DBG_PTS, "failed to find end of lsb-release "
1373 "DESCRIPTION field");
1374 return NULL;
1375 }
1376 }
1377 else
1378 {
1379 value = buf;
1380 pos = strchr(value, '\n');
1381 if (!pos)
1382 {
1383 DBG1(DBG_PTS, "failed to find end of release string");
1384 return NULL;
1385 }
1386 }
1387 break;
1388 }
1389
1390 if (!value)
1391 {
1392 DBG1(DBG_PTS, "no distribution release file found");
1393 return NULL;
1394 }
1395
1396 if (uname(&uninfo) < 0)
1397 {
1398 DBG1(DBG_PTS, "could not retrieve machine architecture");
1399 return NULL;
1400 }
1401
1402 *pos++ = ' ';
1403 len = sizeof(buf)-1 + (pos - buf);
1404 strncpy(pos, uninfo.machine, len);
1405
1406 DBG1(DBG_PTS, "platform is '%s'", value);
1407 return strdup(value);
1408 }
1409
1410 /**
1411 * Check for a TPM by querying for TPM Version Info
1412 */
1413 static bool has_tpm(private_pts_t *this)
1414 {
1415 TSS_HCONTEXT hContext;
1416 TSS_HTPM hTPM;
1417 TSS_RESULT result;
1418 u_int32_t version_info_len;
1419
1420 result = Tspi_Context_Create(&hContext);
1421 if (result != TSS_SUCCESS)
1422 {
1423 DBG1(DBG_PTS, "TPM context could not be created: tss error 0x%x",
1424 result);
1425 return FALSE;
1426 }
1427 result = Tspi_Context_Connect(hContext, NULL);
1428 if (result != TSS_SUCCESS)
1429 {
1430 goto err;
1431 }
1432 result = Tspi_Context_GetTpmObject (hContext, &hTPM);
1433 if (result != TSS_SUCCESS)
1434 {
1435 goto err;
1436 }
1437 result = Tspi_TPM_GetCapability(hTPM, TSS_TPMCAP_VERSION_VAL, 0, NULL,
1438 &version_info_len,
1439 &this->tpm_version_info.ptr);
1440 this->tpm_version_info.len = version_info_len;
1441 if (result != TSS_SUCCESS)
1442 {
1443 goto err;
1444 }
1445 this->tpm_version_info = chunk_clone(this->tpm_version_info);
1446
1447 Tspi_Context_FreeMemory(hContext, NULL);
1448 Tspi_Context_Close(hContext);
1449 return TRUE;
1450
1451 err:
1452 DBG1(DBG_PTS, "TPM not available: tss error 0x%x", result);
1453 Tspi_Context_FreeMemory(hContext, NULL);
1454 Tspi_Context_Close(hContext);
1455 return FALSE;
1456 }
1457
1458 /**
1459 * See header
1460 */
1461 pts_t *pts_create(bool is_imc)
1462 {
1463 private_pts_t *this;
1464
1465 INIT(this,
1466 .public = {
1467 .get_proto_caps = _get_proto_caps,
1468 .set_proto_caps = _set_proto_caps,
1469 .get_meas_algorithm = _get_meas_algorithm,
1470 .set_meas_algorithm = _set_meas_algorithm,
1471 .get_dh_hash_algorithm = _get_dh_hash_algorithm,
1472 .set_dh_hash_algorithm = _set_dh_hash_algorithm,
1473 .create_dh_nonce = _create_dh_nonce,
1474 .get_my_public_value = _get_my_public_value,
1475 .set_peer_public_value = _set_peer_public_value,
1476 .calculate_secret = _calculate_secret,
1477 .get_platform_info = _get_platform_info,
1478 .set_platform_info = _set_platform_info,
1479 .get_tpm_version_info = _get_tpm_version_info,
1480 .set_tpm_version_info = _set_tpm_version_info,
1481 .get_pcr_len = _get_pcr_len,
1482 .get_aik = _get_aik,
1483 .set_aik = _set_aik,
1484 .get_aik_keyid = _get_aik_keyid,
1485 .is_path_valid = _is_path_valid,
1486 .hash_file = _hash_file,
1487 .do_measurements = _do_measurements,
1488 .get_metadata = _get_metadata,
1489 .read_pcr = _read_pcr,
1490 .extend_pcr = _extend_pcr,
1491 .quote_tpm = _quote_tpm,
1492 .select_pcr = _select_pcr,
1493 .add_pcr = _add_pcr,
1494 .get_quote_info = _get_quote_info,
1495 .verify_quote_signature = _verify_quote_signature,
1496 .destroy = _destroy,
1497 },
1498 .is_imc = is_imc,
1499 .proto_caps = PTS_PROTO_CAPS_V,
1500 .algorithm = PTS_MEAS_ALGO_SHA256,
1501 .dh_hash_algorithm = PTS_MEAS_ALGO_SHA256,
1502 );
1503
1504 if (is_imc)
1505 {
1506 this->platform_info = extract_platform_info();
1507
1508 if (has_tpm(this))
1509 {
1510 this->has_tpm = TRUE;
1511 this->pcr_len = PCR_LEN;
1512 this->proto_caps |= PTS_PROTO_CAPS_T | PTS_PROTO_CAPS_D;
1513 load_aik(this);
1514 load_aik_blob(this);
1515 }
1516 }
1517 else
1518 {
1519 this->proto_caps |= PTS_PROTO_CAPS_T | PTS_PROTO_CAPS_D;
1520 }
1521
1522 return &this->public;
1523 }