-
Notifications
You must be signed in to change notification settings - Fork 13
/
e_tpm.c
1287 lines (1099 loc) · 33.5 KB
/
e_tpm.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Licensed Materials - Property of IBM
*
* OpenSSL TPM engine
*
* Copyright (C) International Business Machines Corp., 2005
*
*/
/*
* e_tpm.c
*
* Kent Yoder <yoder1@us.ibm.com>
*
*/
#include <stdio.h>
#include <string.h>
#include <openssl/crypto.h>
#include <openssl/dso.h>
#include <openssl/engine.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/sha.h>
#include <openssl/bn.h>
#include <openssl/pem.h>
#include <tss/platform.h>
#include <tss/tss_defines.h>
#include <tss/tss_typedef.h>
#include <tss/tss_structs.h>
#include <tss/tss_error.h>
#include <tss/tspi.h>
#include <trousers/trousers.h> // XXX DEBUG
#include "e_tpm.h"
//#define DLOPEN_TSPI
#ifndef OPENSSL_NO_HW
#ifndef OPENSSL_NO_HW_TPM
/* engine specific functions */
static int tpm_engine_destroy(ENGINE *);
static int tpm_engine_init(ENGINE *);
static int tpm_engine_finish(ENGINE *);
static int tpm_engine_ctrl(ENGINE *, int, long, void *, void (*)());
static EVP_PKEY *tpm_engine_load_key(ENGINE *, const char *, UI_METHOD *, void *);
static char *tpm_engine_get_auth(UI_METHOD *, char *, int, char *, void *);
#ifndef OPENSSL_NO_RSA
/* rsa functions */
static int tpm_rsa_init(RSA *rsa);
static int tpm_rsa_finish(RSA *rsa);
static int tpm_rsa_pub_dec(int, const unsigned char *, unsigned char *, RSA *, int);
static int tpm_rsa_pub_enc(int, const unsigned char *, unsigned char *, RSA *, int);
static int tpm_rsa_priv_dec(int, const unsigned char *, unsigned char *, RSA *, int);
static int tpm_rsa_priv_enc(int, const unsigned char *, unsigned char *, RSA *, int);
//static int tpm_rsa_sign(int, const unsigned char *, unsigned int, unsigned char *, unsigned int *, const RSA *);
static int tpm_rsa_keygen(RSA *, int, BIGNUM *, BN_GENCB *);
#endif
/* random functions */
static int tpm_rand_bytes(unsigned char *, int);
static int tpm_rand_status(void);
static void tpm_rand_seed(const void *, int);
/* The definitions for control commands specific to this engine */
#define TPM_CMD_SO_PATH ENGINE_CMD_BASE
#define TPM_CMD_PIN ENGINE_CMD_BASE+1
#define TPM_CMD_SECRET_MODE ENGINE_CMD_BASE+2
static const ENGINE_CMD_DEFN tpm_cmd_defns[] = {
{TPM_CMD_SO_PATH,
"SO_PATH",
"Specifies the path to the libtspi.so shared library",
ENGINE_CMD_FLAG_STRING},
{TPM_CMD_PIN,
"PIN",
"Specifies the secret for the SRK (default is plaintext, else set SECRET_MODE)",
ENGINE_CMD_FLAG_STRING},
{TPM_CMD_SECRET_MODE,
"SECRET_MODE",
"The TSS secret mode for all secrets",
ENGINE_CMD_FLAG_NUMERIC},
{0, NULL, NULL, 0}
};
#ifndef OPENSSL_NO_RSA
static RSA_METHOD tpm_rsa = {
"TPM RSA method",
tpm_rsa_pub_enc,
tpm_rsa_pub_dec,
tpm_rsa_priv_enc,
tpm_rsa_priv_dec,
NULL, /* set in tpm_engine_init */
BN_mod_exp_mont,
tpm_rsa_init,
tpm_rsa_finish,
(RSA_FLAG_SIGN_VER | RSA_FLAG_NO_BLINDING),
NULL,
NULL, /* sign */
NULL, /* verify */
tpm_rsa_keygen
};
#endif
static RAND_METHOD tpm_rand = {
/* "TPM RAND method", */
tpm_rand_seed,
tpm_rand_bytes,
NULL,
NULL,
tpm_rand_bytes,
tpm_rand_status,
};
/* Constants used when creating the ENGINE */
static const char *engine_tpm_id = "tpm";
static const char *engine_tpm_name = "TPM hardware engine support";
static const char *TPM_LIBNAME = "tspi";
static TSS_HCONTEXT hContext = NULL_HCONTEXT;
static TSS_HKEY hSRK = NULL_HKEY;
static TSS_HPOLICY hSRKPolicy = NULL_HPOLICY;
static TSS_HTPM hTPM = NULL_HTPM;
static TSS_UUID SRK_UUID = TSS_UUID_SRK;
static UINT32 secret_mode = TSS_SECRET_MODE_PLAIN;
/* varibles used to get/set CRYPTO_EX_DATA values */
int ex_app_data = TPM_ENGINE_EX_DATA_UNINIT;
#ifdef DLOPEN_TSPI
/* This is a process-global DSO handle used for loading and unloading
* the TSS library. NB: This is only set (or unset) during an
* init() or finish() call (reference counts permitting) and they're
* operating with global locks, so this should be thread-safe
* implicitly. */
static DSO *tpm_dso = NULL;
/* These are the function pointers that are (un)set when the library has
* successfully (un)loaded. */
static unsigned int (*p_tspi_Context_Create)();
static unsigned int (*p_tspi_Context_Close)();
static unsigned int (*p_tspi_Context_Connect)();
static unsigned int (*p_tspi_Context_FreeMemory)();
static unsigned int (*p_tspi_Context_CreateObject)();
static unsigned int (*p_tspi_Context_LoadKeyByUUID)();
static unsigned int (*p_tspi_Context_LoadKeyByBlob)();
static unsigned int (*p_tspi_Context_GetTpmObject)();
static unsigned int (*p_tspi_TPM_GetRandom)();
static unsigned int (*p_tspi_TPM_StirRandom)();
static unsigned int (*p_tspi_Key_CreateKey)();
static unsigned int (*p_tspi_Key_LoadKey)();
static unsigned int (*p_tspi_Data_Bind)();
static unsigned int (*p_tspi_Data_Unbind)();
static unsigned int (*p_tspi_GetAttribData)();
static unsigned int (*p_tspi_SetAttribData)();
static unsigned int (*p_tspi_SetAttribUint32)();
static unsigned int (*p_tspi_GetAttribUint32)();
static unsigned int (*p_tspi_Context_CloseObject)();
static unsigned int (*p_tspi_Hash_Sign)();
static unsigned int (*p_tspi_Hash_SetHashValue)();
static unsigned int (*p_tspi_GetPolicyObject)();
static unsigned int (*p_tspi_Policy_SetSecret)();
static unsigned int (*p_tspi_Policy_AssignToObject)();
/* Override the real function calls to use our indirect pointers */
#define Tspi_Context_Create p_tspi_Context_Create
#define Tspi_Context_Close p_tspi_Context_Close
#define Tspi_Context_Connect p_tspi_Context_Connect
#define Tspi_Context_CreateObject p_tspi_Context_CreateObject
#define Tspi_Context_CloseObject p_tspi_Context_CloseObject
#define Tspi_Context_FreeMemory p_tspi_Context_FreeMemory
#define Tspi_Context_LoadKeyByBlob p_tspi_Context_LoadKeyByBlob
#define Tspi_Context_LoadKeyByUUID p_tspi_Context_LoadKeyByUUID
#define Tspi_Context_GetTpmObject p_tspi_Context_GetTpmObject
#define Tspi_TPM_GetRandom p_tspi_TPM_GetRandom
#define Tspi_TPM_StirRandom p_tspi_TPM_StirRandom
#define Tspi_Key_CreateKey p_tspi_Key_CreateKey
#define Tspi_Key_LoadKey p_tspi_Key_LoadKey
#define Tspi_Data_Bind p_tspi_Data_Bind
#define Tspi_Data_Unbind p_tspi_Data_Unbind
#define Tspi_GetAttribData p_tspi_GetAttribData
#define Tspi_SetAttribData p_tspi_SetAttribData
#define Tspi_GetAttribUint32 p_tspi_GetAttribUint32
#define Tspi_SetAttribUint32 p_tspi_SetAttribUint32
#define Tspi_GetPolicyObject p_tspi_GetPolicyObject
#define Tspi_Hash_Sign p_tspi_Hash_Sign
#define Tspi_Hash_SetHashValue p_tspi_Hash_SetHashValue
#define Tspi_Policy_SetSecret p_tspi_Policy_SetSecret
#define Tspi_Policy_AssignToObject p_tspi_Policy_AssignToObject
#endif /* DLOPEN_TSPI */
/* This internal function is used by ENGINE_tpm() and possibly by the
* "dynamic" ENGINE support too */
static int bind_helper(ENGINE * e)
{
if (!ENGINE_set_id(e, engine_tpm_id) ||
!ENGINE_set_name(e, engine_tpm_name) ||
#ifndef OPENSSL_NO_RSA
!ENGINE_set_RSA(e, &tpm_rsa) ||
#endif
!ENGINE_set_RAND(e, &tpm_rand) ||
!ENGINE_set_destroy_function(e, tpm_engine_destroy) ||
!ENGINE_set_init_function(e, tpm_engine_init) ||
!ENGINE_set_finish_function(e, tpm_engine_finish) ||
!ENGINE_set_ctrl_function(e, tpm_engine_ctrl) ||
!ENGINE_set_load_pubkey_function(e, tpm_engine_load_key) ||
!ENGINE_set_load_privkey_function(e, tpm_engine_load_key) ||
!ENGINE_set_cmd_defns(e, tpm_cmd_defns))
return 0;
/* Ensure the tpm error handling is set up */
ERR_load_TPM_strings();
return 1;
}
static ENGINE *engine_tpm(void)
{
ENGINE *ret = ENGINE_new();
DBG("%s", __FUNCTION__);
if (!ret)
return NULL;
if (!bind_helper(ret)) {
ENGINE_free(ret);
return NULL;
}
return ret;
}
void ENGINE_load_tpm(void)
{
/* Copied from eng_[openssl|dyn].c */
ENGINE *toadd = engine_tpm();
if (!toadd)
return;
ENGINE_add(toadd);
ENGINE_free(toadd);
ERR_clear_error();
}
int tpm_load_srk(UI_METHOD *ui, void *cb_data)
{
TSS_RESULT result;
UINT32 authusage;
BYTE *auth;
if (hSRK != NULL_HKEY) {
DBGFN("SRK is already loaded.");
return 1;
}
if ((result = Tspi_Context_LoadKeyByUUID(hContext, TSS_PS_TYPE_SYSTEM,
SRK_UUID, &hSRK))) {
TSSerr(TPM_F_TPM_LOAD_SRK, TPM_R_REQUEST_FAILED);
return 0;
}
if ((result = Tspi_GetAttribUint32(hSRK, TSS_TSPATTRIB_KEY_INFO,
TSS_TSPATTRIB_KEYINFO_AUTHUSAGE,
&authusage))) {
Tspi_Context_CloseObject(hContext, hSRK);
TSSerr(TPM_F_TPM_LOAD_SRK, TPM_R_REQUEST_FAILED);
return 0;
}
if (!authusage) {
DBG("SRK has no auth associated with it.");
return 1;
}
/* If hSRKPolicy is non 0, then a policy object for the SRK has already
* been set up by engine pre/post commands. Just assign it to the SRK.
* Otherwise, we need to get the SRK's implicit policy and prompt for a
* secret */
if (hSRKPolicy) {
DBG("Found an already initialized SRK policy, using it");
if ((result = Tspi_Policy_AssignToObject(hSRKPolicy, hSRK))) {
TSSerr(TPM_F_TPM_LOAD_SRK, TPM_R_REQUEST_FAILED);
return 0;
}
return 1;
}
if ((result = Tspi_GetPolicyObject(hSRK, TSS_POLICY_USAGE,
&hSRKPolicy))) {
Tspi_Context_CloseObject(hContext, hSRK);
TSSerr(TPM_F_TPM_LOAD_SRK, TPM_R_REQUEST_FAILED);
return 0;
}
if ((auth = calloc(1, 128)) == NULL) {
TSSerr(TPM_F_TPM_LOAD_SRK, ERR_R_MALLOC_FAILURE);
return 0;
}
if (!tpm_engine_get_auth(ui, (char *)auth, 128, "SRK authorization: ",
cb_data)) {
Tspi_Context_CloseObject(hContext, hSRK);
free(auth);
TSSerr(TPM_F_TPM_LOAD_SRK, TPM_R_REQUEST_FAILED);
}
/* secret_mode is a global that may be set by engine ctrl
* commands. By default, its set to TSS_SECRET_MODE_PLAIN */
if ((result = Tspi_Policy_SetSecret(hSRKPolicy, secret_mode,
strlen((char *)auth), auth))) {
Tspi_Context_CloseObject(hContext, hSRK);
free(auth);
TSSerr(TPM_F_TPM_LOAD_SRK, TPM_R_REQUEST_FAILED);
return 0;
}
free(auth);
return 1;
}
/* Destructor (complements the "ENGINE_tpm()" constructor) */
static int tpm_engine_destroy(ENGINE * e)
{
/* Unload the tpm error strings so any error state including our
* functs or reasons won't lead to a segfault (they simply get displayed
* without corresponding string data because none will be found). */
ERR_unload_TPM_strings();
return 1;
}
/* initialisation function */
static int tpm_engine_init(ENGINE * e)
{
TSS_RESULT result;
DBG("%s", __FUNCTION__);
#ifdef DLOPEN_TSPI
if (tpm_dso != NULL) {
TSSerr(TPM_F_TPM_ENGINE_INIT, TPM_R_ALREADY_LOADED);
return 1;
}
if ((tpm_dso = DSO_load(NULL, TPM_LIBNAME, NULL, 0)) == NULL) {
TSSerr(TPM_F_TPM_ENGINE_INIT, TPM_R_DSO_FAILURE);
goto err;
}
#define bind_tspi_func(dso, func) (p_tspi_##func = (void *)DSO_bind_func(dso, "Tspi_" #func))
if (!bind_tspi_func(tpm_dso, Context_Create) ||
!bind_tspi_func(tpm_dso, Context_Close) ||
!bind_tspi_func(tpm_dso, Context_Connect) ||
!bind_tspi_func(tpm_dso, TPM_GetRandom) ||
!bind_tspi_func(tpm_dso, Key_CreateKey) ||
!bind_tspi_func(tpm_dso, Data_Bind) ||
!bind_tspi_func(tpm_dso, Data_Unbind) ||
!bind_tspi_func(tpm_dso, Context_CreateObject) ||
!bind_tspi_func(tpm_dso, Context_FreeMemory) ||
!bind_tspi_func(tpm_dso, Key_LoadKey) ||
!bind_tspi_func(tpm_dso, Context_LoadKeyByUUID) ||
!bind_tspi_func(tpm_dso, GetAttribData) ||
!bind_tspi_func(tpm_dso, Hash_Sign) ||
!bind_tspi_func(tpm_dso, Context_CloseObject) ||
!bind_tspi_func(tpm_dso, Hash_SetHashValue) ||
!bind_tspi_func(tpm_dso, SetAttribUint32) ||
!bind_tspi_func(tpm_dso, GetPolicyObject) ||
!bind_tspi_func(tpm_dso, Policy_SetSecret) ||
!bind_tspi_func(tpm_dso, TPM_StirRandom) ||
!bind_tspi_func(tpm_dso, Context_LoadKeyByBlob) ||
!bind_tspi_func(tpm_dso, Context_GetTpmObject) ||
!bind_tspi_func(tpm_dso, GetAttribUint32) ||
!bind_tspi_func(tpm_dso, SetAttribData) ||
!bind_tspi_func(tpm_dso, Policy_AssignToObject)
) {
TSSerr(TPM_F_TPM_ENGINE_INIT, TPM_R_DSO_FAILURE);
goto err;
}
#endif /* DLOPEN_TSPI */
if ((result = Tspi_Context_Create(&hContext))) {
TSSerr(TPM_F_TPM_ENGINE_INIT, TPM_R_UNIT_FAILURE);
goto err;
}
/* XXX allow dest to be specified through pre commands */
if ((result = Tspi_Context_Connect(hContext, NULL))) {
TSSerr(TPM_F_TPM_ENGINE_INIT, TPM_R_UNIT_FAILURE);
goto err;
}
if ((result = Tspi_Context_GetTpmObject(hContext, &hTPM))) {
TSSerr(TPM_F_TPM_ENGINE_INIT, TPM_R_UNIT_FAILURE);
goto err;
}
tpm_rsa.rsa_mod_exp = RSA_PKCS1_SSLeay()->rsa_mod_exp;
return 1;
err:
if (hContext != NULL_HCONTEXT) {
Tspi_Context_Close(hContext);
hContext = NULL_HCONTEXT;
hTPM = NULL_HTPM;
}
#ifdef DLOPEN_TSPI
if (tpm_dso) {
DSO_free(tpm_dso);
tpm_dso = NULL;
}
p_tspi_Context_Create = NULL;
p_tspi_Context_Close = NULL;
p_tspi_Context_Connect = NULL;
p_tspi_Context_FreeMemory = NULL;
p_tspi_Context_LoadKeyByBlob = NULL;
p_tspi_Context_LoadKeyByUUID = NULL;
p_tspi_Context_GetTpmObject = NULL;
p_tspi_Context_CloseObject = NULL;
p_tspi_Key_CreateKey = NULL;
p_tspi_Key_LoadKey = NULL;
p_tspi_Data_Bind = NULL;
p_tspi_Data_Unbind = NULL;
p_tspi_Hash_SetHashValue = NULL;
p_tspi_Hash_Sign = NULL;
p_tspi_GetAttribData = NULL;
p_tspi_SetAttribData = NULL;
p_tspi_GetAttribUint32 = NULL;
p_tspi_SetAttribUint32 = NULL;
p_tspi_GetPolicyObject = NULL;
p_tspi_Policy_SetSecret = NULL;
p_tspi_Policy_AssignToObject = NULL;
p_tspi_TPM_StirRandom = NULL;
p_tspi_TPM_GetRandom = NULL;
#endif
return 0;
}
static char *tpm_engine_get_auth(UI_METHOD *ui_method, char *auth, int maxlen,
char *input_string, void *cb_data)
{
UI *ui;
DBG("%s", __FUNCTION__);
ui = UI_new();
if (ui_method)
UI_set_method(ui, ui_method);
UI_add_user_data(ui, cb_data);
if (!UI_add_input_string(ui, input_string, 0, auth, 0, maxlen)) {
TSSerr(TPM_F_TPM_ENGINE_GET_AUTH, TPM_R_UI_METHOD_FAILED);
UI_free(ui);
return NULL;
}
if (UI_process(ui)) {
TSSerr(TPM_F_TPM_ENGINE_GET_AUTH, TPM_R_UI_METHOD_FAILED);
UI_free(ui);
return NULL;
}
UI_free(ui);
return auth;
}
static int tpm_engine_finish(ENGINE * e)
{
DBG("%s", __FUNCTION__);
#ifdef DLOPEN_TSPI
if (tpm_dso == NULL) {
TSSerr(TPM_F_TPM_ENGINE_FINISH, TPM_R_NOT_LOADED);
return 0;
}
#endif
if (hContext != NULL_HCONTEXT) {
Tspi_Context_Close(hContext);
hContext = NULL_HCONTEXT;
}
#ifdef DLOPEN_TSPI
if (!DSO_free(tpm_dso)) {
TSSerr(TPM_F_TPM_ENGINE_FINISH, TPM_R_DSO_FAILURE);
return 0;
}
tpm_dso = NULL;
#endif
return 1;
}
int fill_out_rsa_object(RSA *rsa, TSS_HKEY hKey)
{
TSS_RESULT result;
UINT32 pubkey_len, encScheme, sigScheme;
BYTE *pubkey;
struct rsa_app_data *app_data;
DBG("%s", __FUNCTION__);
if ((result = Tspi_GetAttribUint32(hKey, TSS_TSPATTRIB_KEY_INFO,
TSS_TSPATTRIB_KEYINFO_ENCSCHEME,
&encScheme))) {
TSSerr(TPM_F_TPM_FILL_RSA_OBJECT, TPM_R_REQUEST_FAILED);
return 0;
}
if ((result = Tspi_GetAttribUint32(hKey, TSS_TSPATTRIB_KEY_INFO,
TSS_TSPATTRIB_KEYINFO_SIGSCHEME,
&sigScheme))) {
TSSerr(TPM_F_TPM_FILL_RSA_OBJECT, TPM_R_REQUEST_FAILED);
return 0;
}
/* pull out the public key and put it into the RSA object */
if ((result = Tspi_GetAttribData(hKey, TSS_TSPATTRIB_RSAKEY_INFO,
TSS_TSPATTRIB_KEYINFO_RSA_MODULUS,
&pubkey_len, &pubkey))) {
TSSerr(TPM_F_TPM_FILL_RSA_OBJECT, TPM_R_REQUEST_FAILED);
return 0;
}
if ((rsa->n = BN_bin2bn(pubkey, pubkey_len, rsa->n)) == NULL) {
Tspi_Context_FreeMemory(hContext, pubkey);
TSSerr(TPM_F_TPM_FILL_RSA_OBJECT, TPM_R_BN_CONVERSION_FAILED);
return 0;
}
Tspi_Context_FreeMemory(hContext, pubkey);
/* set e in the RSA object */
if (!rsa->e && ((rsa->e = BN_new()) == NULL)) {
TSSerr(TPM_F_TPM_FILL_RSA_OBJECT, ERR_R_MALLOC_FAILURE);
return 0;
}
if (!BN_set_word(rsa->e, 65537)) {
TSSerr(TPM_F_TPM_FILL_RSA_OBJECT, TPM_R_REQUEST_FAILED);
BN_free(rsa->e);
rsa->e = NULL;
return 0;
}
if ((app_data = OPENSSL_malloc(sizeof(struct rsa_app_data))) == NULL) {
TSSerr(TPM_F_TPM_FILL_RSA_OBJECT, ERR_R_MALLOC_FAILURE);
BN_free(rsa->e);
rsa->e = NULL;
return 0;
}
DBG("Setting hKey(0x%x) in RSA object", hKey);
DBG("Setting encScheme(0x%x) in RSA object", encScheme);
DBG("Setting sigScheme(0x%x) in RSA object", sigScheme);
memset(app_data, 0, sizeof(struct rsa_app_data));
app_data->hKey = hKey;
app_data->encScheme = encScheme;
app_data->sigScheme = sigScheme;
RSA_set_ex_data(rsa, ex_app_data, app_data);
return 1;
}
static EVP_PKEY *tpm_engine_load_key(ENGINE *e, const char *key_id,
UI_METHOD *ui, void *cb_data)
{
ASN1_OCTET_STRING *blobstr;
TSS_HKEY hKey;
TSS_RESULT result;
UINT32 authusage;
RSA *rsa;
EVP_PKEY *pkey;
BIO *bf;
DBG("%s", __FUNCTION__);
if (!key_id) {
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY, ERR_R_PASSED_NULL_PARAMETER);
return NULL;
}
if (!tpm_load_srk(ui, cb_data)) {
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY, TPM_R_SRK_LOAD_FAILED);
return NULL;
}
if ((bf = BIO_new_file(key_id, "r")) == NULL) {
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY,
TPM_R_FILE_NOT_FOUND);
return NULL;
}
blobstr = PEM_ASN1_read_bio((void *)d2i_ASN1_OCTET_STRING,
"TSS KEY BLOB", bf, NULL, NULL, NULL);
if (!blobstr) {
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY,
TPM_R_FILE_READ_FAILED);
BIO_free(bf);
return NULL;
}
BIO_free(bf);
DBG("Loading blob of size: %d", blobstr->length);
if ((result = Tspi_Context_LoadKeyByBlob(hContext, hSRK,
blobstr->length,
blobstr->data, &hKey))) {
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY,
TPM_R_REQUEST_FAILED);
return NULL;
}
ASN1_OCTET_STRING_free(blobstr);
if ((result = Tspi_GetAttribUint32(hKey, TSS_TSPATTRIB_KEY_INFO,
TSS_TSPATTRIB_KEYINFO_AUTHUSAGE,
&authusage))) {
Tspi_Context_CloseObject(hContext, hKey);
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY,
TPM_R_REQUEST_FAILED);
return NULL;
}
if (authusage) {
TSS_HPOLICY hPolicy;
BYTE *auth;
if ((auth = calloc(1, 128)) == NULL) {
Tspi_Context_CloseObject(hContext, hKey);
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY, ERR_R_MALLOC_FAILURE);
return NULL;
}
if (!tpm_engine_get_auth(ui, (char *)auth, 128,
"TPM Key Password: ",
cb_data)) {
Tspi_Context_CloseObject(hContext, hKey);
free(auth);
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY, TPM_R_REQUEST_FAILED);
return NULL;
}
if ((result = Tspi_Context_CreateObject(hContext,
TSS_OBJECT_TYPE_POLICY,
TSS_POLICY_USAGE,
&hPolicy))) {
Tspi_Context_CloseObject(hContext, hKey);
free(auth);
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY, TPM_R_REQUEST_FAILED);
return 0;
}
if ((result = Tspi_Policy_AssignToObject(hPolicy, hKey))) {
Tspi_Context_CloseObject(hContext, hKey);
Tspi_Context_CloseObject(hContext, hPolicy);
free(auth);
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY, TPM_R_REQUEST_FAILED);
return 0;
}
if ((result = Tspi_Policy_SetSecret(hPolicy,
TSS_SECRET_MODE_PLAIN,
strlen((char *)auth), auth))) {
Tspi_Context_CloseObject(hContext, hKey);
Tspi_Context_CloseObject(hContext, hPolicy);
free(auth);
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY, TPM_R_REQUEST_FAILED);
return 0;
}
free(auth);
}
/* create the new objects to return */
if ((pkey = EVP_PKEY_new()) == NULL) {
Tspi_Context_CloseObject(hContext, hKey);
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY, ERR_R_MALLOC_FAILURE);
return NULL;
}
pkey->type = EVP_PKEY_RSA;
if ((rsa = RSA_new()) == NULL) {
EVP_PKEY_free(pkey);
Tspi_Context_CloseObject(hContext, hKey);
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY, ERR_R_MALLOC_FAILURE);
return NULL;
}
rsa->meth = &tpm_rsa;
/* call our local init function here */
rsa->meth->init(rsa);
pkey->pkey.rsa = rsa;
if (!fill_out_rsa_object(rsa, hKey)) {
EVP_PKEY_free(pkey);
RSA_free(rsa);
Tspi_Context_CloseObject(hContext, hKey);
TSSerr(TPM_F_TPM_ENGINE_LOAD_KEY, TPM_R_REQUEST_FAILED);
return NULL;
}
EVP_PKEY_assign_RSA(pkey, rsa);
return pkey;
}
static int tpm_create_srk_policy(void *secret)
{
TSS_RESULT result;
UINT32 secret_len;
if (secret_mode == TSS_SECRET_MODE_SHA1)
secret_len = SHA_DIGEST_LENGTH;
else {
secret_len = (secret == NULL) ? 0 : strlen((char *)secret);
DBG("Using SRK secret = %s", (BYTE *)secret);
}
if (hSRKPolicy == NULL_HPOLICY) {
DBG("Creating SRK policy");
if ((result = Tspi_Context_CreateObject(hContext,
TSS_OBJECT_TYPE_POLICY,
TSS_POLICY_USAGE,
&hSRKPolicy))) {
TSSerr(TPM_F_TPM_CREATE_SRK_POLICY,
TPM_R_REQUEST_FAILED);
return 0;
}
}
if ((result = Tspi_Policy_SetSecret(hSRKPolicy, secret_mode,
secret_len, (BYTE *)secret))) {
TSSerr(TPM_F_TPM_CREATE_SRK_POLICY, TPM_R_REQUEST_FAILED);
return 0;
}
return 1;
}
static int tpm_engine_ctrl(ENGINE * e, int cmd, long i, void *p, void (*f) ())
{
int initialised = !!hContext;
DBG("%s", __FUNCTION__);
switch (cmd) {
case TPM_CMD_SO_PATH:
if (p == NULL) {
TSSerr(TPM_F_TPM_ENGINE_CTRL,
ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (initialised) {
TSSerr(TPM_F_TPM_ENGINE_CTRL,
TPM_R_ALREADY_LOADED);
return 0;
}
TPM_LIBNAME = (const char *) p;
return 1;
case TPM_CMD_SECRET_MODE:
switch ((UINT32)i) {
case TSS_SECRET_MODE_POPUP:
secret_mode = (UINT32)i;
return tpm_create_srk_policy(p);
case TSS_SECRET_MODE_SHA1:
/* fall through */
case TSS_SECRET_MODE_PLAIN:
secret_mode = (UINT32)i;
break;
default:
TSSerr(TPM_F_TPM_ENGINE_CTRL,
TPM_R_UNKNOWN_SECRET_MODE);
return 0;
break;
}
return 1;
case TPM_CMD_PIN:
return tpm_create_srk_policy(p);
default:
break;
}
TSSerr(TPM_F_TPM_ENGINE_CTRL, TPM_R_CTRL_COMMAND_NOT_IMPLEMENTED);
return 0;
}
#ifndef OPENSSL_NO_RSA
static int tpm_rsa_init(RSA *rsa)
{
DBG("%s", __FUNCTION__);
if (ex_app_data == TPM_ENGINE_EX_DATA_UNINIT)
ex_app_data = RSA_get_ex_new_index(0, NULL, NULL, NULL, NULL);
if (ex_app_data == TPM_ENGINE_EX_DATA_UNINIT) {
TSSerr(TPM_F_TPM_RSA_INIT, TPM_R_REQUEST_FAILED);
return 0;
}
return 1;
}
static int tpm_rsa_finish(RSA *rsa)
{
struct rsa_app_data *app_data = RSA_get_ex_data(rsa, ex_app_data);
DBG("%s", __FUNCTION__);
OPENSSL_free(app_data);
return 1;
}
static int tpm_rsa_pub_dec(int flen,
const unsigned char *from,
unsigned char *to,
RSA *rsa,
int padding)
{
int rv;
DBG("%s", __FUNCTION__);
if ((rv = RSA_PKCS1_SSLeay()->rsa_pub_dec(flen, from, to, rsa,
padding)) < 0) {
TSSerr(TPM_F_TPM_RSA_PUB_DEC, TPM_R_REQUEST_FAILED);
return 0;
}
return rv;
}
static int tpm_rsa_priv_dec(int flen,
const unsigned char *from,
unsigned char *to,
RSA *rsa,
int padding)
{
struct rsa_app_data *app_data = RSA_get_ex_data(rsa, ex_app_data);
TSS_RESULT result;
UINT32 out_len, in_len;
BYTE *out;
int rv;
DBG("%s", __FUNCTION__);
if (!app_data) {
DBG("No app data found for RSA object %p. Calling software.",
rsa);
if ((rv = RSA_PKCS1_SSLeay()->rsa_priv_dec(flen, from, to, rsa,
padding)) < 0) {
TSSerr(TPM_F_TPM_RSA_PRIV_DEC, TPM_R_REQUEST_FAILED);
}
return rv;
}
if (app_data->hKey == NULL_HKEY) {
TSSerr(TPM_F_TPM_RSA_PRIV_DEC, TPM_R_INVALID_KEY);
return 0;
}
if (app_data->hEncData == NULL_HENCDATA) {
if ((result = Tspi_Context_CreateObject(hContext,
TSS_OBJECT_TYPE_ENCDATA,
TSS_ENCDATA_BIND,
&app_data->hEncData))) {
TSSerr(TPM_F_TPM_RSA_PRIV_DEC, TPM_R_REQUEST_FAILED);
return 0;
}
}
if (padding == RSA_PKCS1_PADDING &&
app_data->encScheme != TSS_ES_RSAESPKCSV15) {
TSSerr(TPM_F_TPM_RSA_PRIV_DEC,
TPM_R_INVALID_PADDING_TYPE);
DBG("encScheme(0x%x) in RSA object", app_data->encScheme);
return 0;
} else if (padding == RSA_PKCS1_OAEP_PADDING &&
app_data->encScheme != TSS_ES_RSAESOAEP_SHA1_MGF1) {
TSSerr(TPM_F_TPM_RSA_PRIV_DEC,
TPM_R_INVALID_PADDING_TYPE);
DBG("encScheme(0x%x) in RSA object", app_data->encScheme);
return 0;
}
in_len = flen;
if ((result = Tspi_SetAttribData(app_data->hEncData,
TSS_TSPATTRIB_ENCDATA_BLOB,
TSS_TSPATTRIB_ENCDATABLOB_BLOB,
in_len, from))) {
TSSerr(TPM_F_TPM_RSA_PRIV_DEC, TPM_R_REQUEST_FAILED);
return 0;
}
if ((result = Tspi_Data_Unbind(app_data->hEncData, app_data->hKey,
&out_len, &out))) {
TSSerr(TPM_F_TPM_RSA_PRIV_DEC, TPM_R_REQUEST_FAILED);
return 0;
}
DBG("%s: writing out %d bytes as a signature", __FUNCTION__, out_len);
memcpy(to, out, out_len);
Tspi_Context_FreeMemory(hContext, out);
return out_len;
}
static int tpm_rsa_pub_enc(int flen,
const unsigned char *from,
unsigned char *to,
RSA *rsa,
int padding)
{
struct rsa_app_data *app_data = RSA_get_ex_data(rsa, ex_app_data);
TSS_RESULT result;
UINT32 out_len, in_len;
BYTE *out;
int rv;
DBG("%s", __FUNCTION__);
if (!app_data) {
DBG("No app data found for RSA object %p. Calling software.",
rsa);
if ((rv = RSA_PKCS1_SSLeay()->rsa_pub_enc(flen, from, to, rsa,
padding)) < 0) {
TSSerr(TPM_F_TPM_RSA_PUB_ENC, TPM_R_REQUEST_FAILED);
}
return rv;
}
if (app_data->hKey == NULL_HKEY) {
TSSerr(TPM_F_TPM_RSA_PUB_ENC, TPM_R_INVALID_KEY);
return 0;
}
if (app_data->hEncData == NULL_HENCDATA) {
if ((result = Tspi_Context_CreateObject(hContext,
TSS_OBJECT_TYPE_ENCDATA,
TSS_ENCDATA_BIND,
&app_data->hEncData))) {
TSSerr(TPM_F_TPM_RSA_PUB_ENC, TPM_R_REQUEST_FAILED);
return 0;
}
DBG("Setting hEncData(0x%x) in RSA object", app_data->hEncData);
}
DBG("flen is %d", flen);
if (padding == RSA_PKCS1_PADDING) {
if (app_data->encScheme != TSS_ES_RSAESPKCSV15) {
TSSerr(TPM_F_TPM_RSA_PUB_ENC,
TPM_R_INVALID_PADDING_TYPE);
DBG("encScheme(0x%x) in RSA object",
app_data->encScheme);
return 0;
}
if (flen > (RSA_size(rsa) - RSA_PKCS1_PADDING_SIZE)) {
TSSerr(TPM_F_TPM_RSA_PUB_ENC,
RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
return 0;
}
} else if (padding == RSA_PKCS1_OAEP_PADDING) {
if (app_data->encScheme != TSS_ES_RSAESOAEP_SHA1_MGF1) {
TSSerr(TPM_F_TPM_RSA_PUB_ENC,
TPM_R_INVALID_PADDING_TYPE);
DBG("encScheme(0x%x) in RSA object",
app_data->encScheme);
return 0;
}
/* subtract an extra 5 for the TCPA_BOUND_DATA structure */
if (flen > (RSA_size(rsa) - RSA_PKCS1_PADDING_SIZE - 5)) {
TSSerr(TPM_F_TPM_RSA_PUB_ENC,
RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
return 0;
}
} else {
TSSerr(TPM_F_TPM_RSA_PUB_ENC, TPM_R_INVALID_ENC_SCHEME);
return 0;
}
in_len = flen;
DBG("Bind: hKey(0x%x) hEncData(0x%x) in_len(%u)", app_data->hKey,
app_data->hEncData, in_len);
if ((result = Tspi_Data_Bind(app_data->hEncData, app_data->hKey,
in_len, from))) {
TSSerr(TPM_F_TPM_RSA_PUB_ENC, TPM_R_REQUEST_FAILED);
DBG("result = 0x%x (%s)", result,
Trspi_Error_String(result));
return 0;
}