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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2015 Google, Inc
*/
#include <common.h>
#include <command.h>
#include <cpu_func.h>
#include <log.h>
#include <tpm-v1.h>
#include "tpm-user-utils.h"
#include <tpm_api.h>
/* Prints error and returns on failure */
#define TPM_CHECK(tpm_command) do { \
uint32_t result; \
\
result = (tpm_command); \
if (result != TPM_SUCCESS) { \
printf("TEST FAILED: line %d: " #tpm_command ": 0x%x\n", \
__LINE__, result); \
return result; \
} \
} while (0)
#define INDEX0 0xda70
#define INDEX1 0xda71
#define INDEX2 0xda72
#define INDEX3 0xda73
#define INDEX_INITIALISED 0xda80
#define PHYS_PRESENCE 4
#define PRESENCE 8
static uint32_t TlclStartupIfNeeded(struct udevice *dev)
{
uint32_t result = tpm_startup(dev, TPM_ST_CLEAR);
return result == TPM_INVALID_POSTINIT ? TPM_SUCCESS : result;
}
static int test_timer(struct udevice *dev)
{
printf("get_timer(0) = %lu\n", get_timer(0));
return 0;
}
static uint32_t tpm_get_flags(struct udevice *dev, uint8_t *disable,
uint8_t *deactivated, uint8_t *nvlocked)
{
struct tpm_permanent_flags pflags;
uint32_t result;
result = tpm1_get_permanent_flags(dev, &pflags);
if (result)
return result;
if (disable)
*disable = pflags.disable;
if (deactivated)
*deactivated = pflags.deactivated;
if (nvlocked)
*nvlocked = pflags.nv_locked;
debug("TPM: Got flags disable=%d, deactivated=%d, nvlocked=%d\n",
pflags.disable, pflags.deactivated, pflags.nv_locked);
return 0;
}
static uint32_t tpm_nv_write_value_lock(struct udevice *dev, uint32_t index)
{
debug("TPM: Write lock 0x%x\n", index);
return tpm_nv_write_value(dev, index, NULL, 0);
}
static int tpm_is_owned(struct udevice *dev)
{
uint8_t response[TPM_PUBEK_SIZE];
uint32_t result;
result = tpm_read_pubek(dev, response, sizeof(response));
return result != TPM_SUCCESS;
}
static int test_early_extend(struct udevice *dev)
{
uint8_t value_in[20];
uint8_t value_out[20];
printf("Testing earlyextend ...");
tpm_init(dev);
TPM_CHECK(tpm_startup(dev, TPM_ST_CLEAR));
TPM_CHECK(tpm_continue_self_test(dev));
TPM_CHECK(tpm_pcr_extend(dev, 1, value_in, sizeof(value_in), value_out,
"test"));
printf("done\n");
return 0;
}
static int test_early_nvram(struct udevice *dev)
{
uint32_t x;
printf("Testing earlynvram ...");
tpm_init(dev);
TPM_CHECK(tpm_startup(dev, TPM_ST_CLEAR));
TPM_CHECK(tpm_continue_self_test(dev));
TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
printf("done\n");
return 0;
}
static int test_early_nvram2(struct udevice *dev)
{
uint32_t x;
printf("Testing earlynvram2 ...");
tpm_init(dev);
TPM_CHECK(tpm_startup(dev, TPM_ST_CLEAR));
TPM_CHECK(tpm_continue_self_test(dev));
TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
TPM_CHECK(tpm_nv_write_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
printf("done\n");
return 0;
}
static int test_enable(struct udevice *dev)
{
uint8_t disable = 0, deactivated = 0;
printf("Testing enable ...\n");
tpm_init(dev);
TPM_CHECK(TlclStartupIfNeeded(dev));
TPM_CHECK(tpm_self_test_full(dev));
TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
printf("\tdisable is %d, deactivated is %d\n", disable, deactivated);
TPM_CHECK(tpm_physical_enable(dev));
TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
printf("\tdisable is %d, deactivated is %d\n", disable, deactivated);
if (disable == 1 || deactivated == 1)
printf("\tfailed to enable or activate\n");
printf("\tdone\n");
return 0;
}
#define reboot() do { \
printf("\trebooting...\n"); \
reset_cpu(); \
} while (0)
static int test_fast_enable(struct udevice *dev)
{
uint8_t disable = 0, deactivated = 0;
int i;
printf("Testing fastenable ...\n");
tpm_init(dev);
TPM_CHECK(TlclStartupIfNeeded(dev));
TPM_CHECK(tpm_self_test_full(dev));
TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
printf("\tdisable is %d, deactivated is %d\n", disable, deactivated);
for (i = 0; i < 2; i++) {
TPM_CHECK(tpm_force_clear(dev));
TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
printf("\tdisable is %d, deactivated is %d\n", disable,
deactivated);
assert(disable == 1 && deactivated == 1);
TPM_CHECK(tpm_physical_enable(dev));
TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
printf("\tdisable is %d, deactivated is %d\n", disable,
deactivated);
assert(disable == 0 && deactivated == 0);
}
printf("\tdone\n");
return 0;
}
static int test_global_lock(struct udevice *dev)
{
uint32_t zero = 0;
uint32_t result;
uint32_t x;
printf("Testing globallock ...\n");
tpm_init(dev);
TPM_CHECK(TlclStartupIfNeeded(dev));
TPM_CHECK(tpm_self_test_full(dev));
TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
TPM_CHECK(tpm_nv_write_value(dev, INDEX0, (uint8_t *)&zero,
sizeof(uint32_t)));
TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
TPM_CHECK(tpm_nv_write_value(dev, INDEX1, (uint8_t *)&zero,
sizeof(uint32_t)));
TPM_CHECK(tpm_set_global_lock(dev));
/* Verifies that write to index0 fails */
x = 1;
result = tpm_nv_write_value(dev, INDEX0, (uint8_t *)&x, sizeof(x));
assert(result == TPM_AREA_LOCKED);
TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
assert(x == 0);
/* Verifies that write to index1 is still possible */
x = 2;
TPM_CHECK(tpm_nv_write_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
assert(x == 2);
/* Turns off PP */
tpm_tsc_physical_presence(dev, PHYS_PRESENCE);
/* Verifies that write to index1 fails */
x = 3;
result = tpm_nv_write_value(dev, INDEX1, (uint8_t *)&x, sizeof(x));
assert(result == TPM_BAD_PRESENCE);
TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
assert(x == 2);
printf("\tdone\n");
return 0;
}
static int test_lock(struct udevice *dev)
{
printf("Testing lock ...\n");
tpm_init(dev);
tpm_startup(dev, TPM_ST_CLEAR);
tpm_self_test_full(dev);
tpm_tsc_physical_presence(dev, PRESENCE);
tpm_nv_write_value_lock(dev, INDEX0);
printf("\tLocked 0x%x\n", INDEX0);
printf("\tdone\n");
return 0;
}
static void initialise_spaces(struct udevice *dev)
{
uint32_t zero = 0;
uint32_t perm = TPM_NV_PER_WRITE_STCLEAR | TPM_NV_PER_PPWRITE;
printf("\tInitialising spaces\n");
tpm1_nv_set_locked(dev); /* useful only the first time */
tpm1_nv_define_space(dev, INDEX0, perm, 4);
tpm_nv_write_value(dev, INDEX0, (uint8_t *)&zero, 4);
tpm1_nv_define_space(dev, INDEX1, perm, 4);
tpm_nv_write_value(dev, INDEX1, (uint8_t *)&zero, 4);
tpm1_nv_define_space(dev, INDEX2, perm, 4);
tpm_nv_write_value(dev, INDEX2, (uint8_t *)&zero, 4);
tpm1_nv_define_space(dev, INDEX3, perm, 4);
tpm_nv_write_value(dev, INDEX3, (uint8_t *)&zero, 4);
perm = TPM_NV_PER_READ_STCLEAR | TPM_NV_PER_WRITE_STCLEAR |
TPM_NV_PER_PPWRITE;
tpm1_nv_define_space(dev, INDEX_INITIALISED, perm, 1);
}
static int test_readonly(struct udevice *dev)
{
uint8_t c;
uint32_t index_0, index_1, index_2, index_3;
int read0, read1, read2, read3;
printf("Testing readonly ...\n");
tpm_init(dev);
tpm_startup(dev, TPM_ST_CLEAR);
tpm_self_test_full(dev);
tpm_tsc_physical_presence(dev, PRESENCE);
/*
* Checks if initialisation has completed by trying to read-lock a
* space that's created at the end of initialisation
*/
if (tpm_nv_read_value(dev, INDEX_INITIALISED, &c, 0) == TPM_BADINDEX) {
/* The initialisation did not complete */
initialise_spaces(dev);
}
/* Checks if spaces are OK or messed up */
read0 = tpm_nv_read_value(dev, INDEX0, (uint8_t *)&index_0,
sizeof(index_0));
read1 = tpm_nv_read_value(dev, INDEX1, (uint8_t *)&index_1,
sizeof(index_1));
read2 = tpm_nv_read_value(dev, INDEX2, (uint8_t *)&index_2,
sizeof(index_2));
read3 = tpm_nv_read_value(dev, INDEX3, (uint8_t *)&index_3,
sizeof(index_3));
if (read0 || read1 || read2 || read3) {
printf("Invalid contents\n");
return 0;
}
/*
* Writes space, and locks it. Then attempts to write again.
* I really wish I could use the imperative.
*/
index_0 += 1;
if (tpm_nv_write_value(dev, INDEX0, (uint8_t *)&index_0,
sizeof(index_0)) !=
TPM_SUCCESS) {
pr_err("\tcould not write index 0\n");
}
tpm_nv_write_value_lock(dev, INDEX0);
if (tpm_nv_write_value(dev, INDEX0, (uint8_t *)&index_0,
sizeof(index_0)) ==
TPM_SUCCESS)
pr_err("\tindex 0 is not locked\n");
printf("\tdone\n");
return 0;
}
static int test_redefine_unowned(struct udevice *dev)
{
uint32_t perm;
uint32_t result;
uint32_t x;
printf("Testing redefine_unowned ...");
tpm_init(dev);
TPM_CHECK(TlclStartupIfNeeded(dev));
TPM_CHECK(tpm_self_test_full(dev));
TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
assert(!tpm_is_owned(dev));
/* Ensures spaces exist. */
TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)));
TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (uint8_t *)&x, sizeof(x)));
/* Redefines spaces a couple of times. */
perm = TPM_NV_PER_PPWRITE | TPM_NV_PER_GLOBALLOCK;
TPM_CHECK(tpm1_nv_define_space(dev, INDEX0, perm,
2 * sizeof(uint32_t)));
TPM_CHECK(tpm1_nv_define_space(dev, INDEX0, perm, sizeof(uint32_t)));
perm = TPM_NV_PER_PPWRITE;
TPM_CHECK(tpm1_nv_define_space(dev, INDEX1, perm,
2 * sizeof(uint32_t)));
TPM_CHECK(tpm1_nv_define_space(dev, INDEX1, perm, sizeof(uint32_t)));
/* Sets the global lock */
tpm_set_global_lock(dev);
/* Verifies that index0 cannot be redefined */
result = tpm1_nv_define_space(dev, INDEX0, perm, sizeof(uint32_t));
assert(result == TPM_AREA_LOCKED);
/* Checks that index1 can */
TPM_CHECK(tpm1_nv_define_space(dev, INDEX1, perm,
2 * sizeof(uint32_t)));
TPM_CHECK(tpm1_nv_define_space(dev, INDEX1, perm, sizeof(uint32_t)));
/* Turns off PP */
tpm_tsc_physical_presence(dev, PHYS_PRESENCE);
/* Verifies that neither index0 nor index1 can be redefined */
result = tpm1_nv_define_space(dev, INDEX0, perm, sizeof(uint32_t));
assert(result == TPM_BAD_PRESENCE);
result = tpm1_nv_define_space(dev, INDEX1, perm, sizeof(uint32_t));
assert(result == TPM_BAD_PRESENCE);
printf("done\n");
return 0;
}
#define PERMPPGL (TPM_NV_PER_PPWRITE | TPM_NV_PER_GLOBALLOCK)
#define PERMPP TPM_NV_PER_PPWRITE
static int test_space_perm(struct udevice *dev)
{
uint32_t perm;
printf("Testing spaceperm ...");
tpm_init(dev);
TPM_CHECK(TlclStartupIfNeeded(dev));
TPM_CHECK(tpm_continue_self_test(dev));
TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
TPM_CHECK(tpm_get_permissions(dev, INDEX0, &perm));
assert((perm & PERMPPGL) == PERMPPGL);
TPM_CHECK(tpm_get_permissions(dev, INDEX1, &perm));
assert((perm & PERMPP) == PERMPP);
printf("done\n");
return 0;
}
static int test_startup(struct udevice *dev)
{
uint32_t result;
printf("Testing startup ...\n");
tpm_init(dev);
result = tpm_startup(dev, TPM_ST_CLEAR);
if (result != 0 && result != TPM_INVALID_POSTINIT)
printf("\ttpm startup failed with 0x%x\n", result);
result = tpm_get_flags(dev, NULL, NULL, NULL);
if (result != 0)
printf("\ttpm getflags failed with 0x%x\n", result);
printf("\texecuting SelfTestFull\n");
tpm_self_test_full(dev);
result = tpm_get_flags(dev, NULL, NULL, NULL);
if (result != 0)
printf("\ttpm getflags failed with 0x%x\n", result);
printf("\tdone\n");
return 0;
}
/*
* Runs [op] and ensures it returns success and doesn't run longer than
* [time_limit] in milliseconds.
*/
#define TTPM_CHECK(op, time_limit) do { \
ulong start, time; \
uint32_t __result; \
\
start = get_timer(0); \
__result = op; \
if (__result != TPM_SUCCESS) { \
printf("\t" #op ": error 0x%x\n", __result); \
return -1; \
} \
time = get_timer(start); \
printf("\t" #op ": %lu ms\n", time); \
if (time > (ulong)time_limit) { \
printf("\t" #op " exceeded " #time_limit " ms\n"); \
} \
} while (0)
static int test_timing(struct udevice *dev)
{
uint8_t in[20], out[20];
uint32_t x;
printf("Testing timing ...");
tpm_init(dev);
TTPM_CHECK(TlclStartupIfNeeded(dev), 50);
TTPM_CHECK(tpm_continue_self_test(dev), 100);
TTPM_CHECK(tpm_self_test_full(dev), 1000);
TTPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE), 100);
TTPM_CHECK(tpm_nv_write_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)),
100);
TTPM_CHECK(tpm_nv_read_value(dev, INDEX0, (uint8_t *)&x, sizeof(x)),
100);
TTPM_CHECK(tpm_pcr_extend(dev, 0, in, sizeof(in), out, "test"), 200);
TTPM_CHECK(tpm_set_global_lock(dev), 50);
TTPM_CHECK(tpm_tsc_physical_presence(dev, PHYS_PRESENCE), 100);
printf("done\n");
return 0;
}
#define TPM_MAX_NV_WRITES_NOOWNER 64
static int test_write_limit(struct udevice *dev)
{
uint32_t result;
int i;
printf("Testing writelimit ...\n");
tpm_init(dev);
TPM_CHECK(TlclStartupIfNeeded(dev));
TPM_CHECK(tpm_self_test_full(dev));
TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
TPM_CHECK(tpm_force_clear(dev));
TPM_CHECK(tpm_physical_enable(dev));
TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
for (i = 0; i < TPM_MAX_NV_WRITES_NOOWNER + 2; i++) {
printf("\twriting %d\n", i);
result = tpm_nv_write_value(dev, INDEX0, (uint8_t *)&i,
sizeof(i));
switch (result) {
case TPM_SUCCESS:
break;
case TPM_MAXNVWRITES:
assert(i >= TPM_MAX_NV_WRITES_NOOWNER);
break;
default:
pr_err("\tunexpected error code %d (0x%x)\n",
result, result);
}
}
/* Reset write count */
TPM_CHECK(tpm_force_clear(dev));
TPM_CHECK(tpm_physical_enable(dev));
TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
/* Try writing again. */
TPM_CHECK(tpm_nv_write_value(dev, INDEX0, (uint8_t *)&i, sizeof(i)));
printf("\tdone\n");
return 0;
}
#define VOIDTEST(XFUNC) \
int do_test_##XFUNC(struct cmd_tbl *cmd_tbl, int flag, int argc, \
char *const argv[]) \
{ \
struct udevice *dev; \
int ret; \
\
ret = get_tpm(&dev); \
if (ret) \
return ret; \
return test_##XFUNC(dev); \
}
#define VOIDENT(XNAME) \
U_BOOT_CMD_MKENT(XNAME, 0, 1, do_test_##XNAME, "", ""),
VOIDTEST(early_extend)
VOIDTEST(early_nvram)
VOIDTEST(early_nvram2)
VOIDTEST(enable)
VOIDTEST(fast_enable)
VOIDTEST(global_lock)
VOIDTEST(lock)
VOIDTEST(readonly)
VOIDTEST(redefine_unowned)
VOIDTEST(space_perm)
VOIDTEST(startup)
VOIDTEST(timing)
VOIDTEST(write_limit)
VOIDTEST(timer)
static struct cmd_tbl cmd_cros_tpm_sub[] = {
VOIDENT(early_extend)
VOIDENT(early_nvram)
VOIDENT(early_nvram2)
VOIDENT(enable)
VOIDENT(fast_enable)
VOIDENT(global_lock)
VOIDENT(lock)
VOIDENT(readonly)
VOIDENT(redefine_unowned)
VOIDENT(space_perm)
VOIDENT(startup)
VOIDENT(timing)
VOIDENT(write_limit)
VOIDENT(timer)
};
static int do_tpmtest(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct cmd_tbl *c;
int i;
printf("argc = %d, argv = ", argc);
for (i = 0; i < argc; i++)
printf(" %s", argv[i]);
printf("\n------\n");
argc--;
argv++;
c = find_cmd_tbl(argv[0], cmd_cros_tpm_sub,
ARRAY_SIZE(cmd_cros_tpm_sub));
return c ? c->cmd(cmdtp, flag, argc, argv) : cmd_usage(cmdtp);
}
U_BOOT_CMD(tpmtest, 2, 1, do_tpmtest, "TPM tests",
"\n\tearly_extend\n"
"\tearly_nvram\n"
"\tearly_nvram2\n"
"\tenable\n"
"\tfast_enable\n"
"\tglobal_lock\n"
"\tlock\n"
"\treadonly\n"
"\tredefine_unowned\n"
"\tspace_perm\n"
"\tstartup\n"
"\ttiming\n"
"\twrite_limit\n");
|