cmd_tpm.c 19.2 KB
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
/*
 * Copyright (c) 2013 The Chromium OS Authors.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <command.h>
#include <malloc.h>
#include <tpm.h>
#include <asm/unaligned.h>
#include <linux/string.h>

/* Useful constants */
enum {
	DIGEST_LENGTH		= 20,
	/* max lengths, valid for RSA keys <= 2048 bits */
	TPM_PUBKEY_MAX_LENGTH	= 288,
};

/**
 * Print a byte string in hexdecimal format, 16-bytes per line.
 *
 * @param data		byte string to be printed
 * @param count		number of bytes to be printed
 */
static void print_byte_string(uint8_t *data, size_t count)
{
	int i, print_newline = 0;

	for (i = 0; i < count; i++) {
		printf(" %02x", data[i]);
		print_newline = (i % 16 == 15);
		if (print_newline)
			putc('\n');
	}
	/* Avoid duplicated newline at the end */
	if (!print_newline)
		putc('\n');
}

/**
 * Convert a text string of hexdecimal values into a byte string.
 *
 * @param bytes		text string of hexdecimal values with no space
 *			between them
 * @param data		output buffer for byte string.  The caller has to make
 *			sure it is large enough for storing the output.  If
 *			NULL is passed, a large enough buffer will be allocated,
 *			and the caller must free it.
 * @param count_ptr	output variable for the length of byte string
 * @return pointer to output buffer
 */
static void *parse_byte_string(char *bytes, uint8_t *data, size_t *count_ptr)
{
	char byte[3];
	size_t count, length;
	int i;

	length = strlen(bytes);
	count = length / 2;

	if (!data)
		data = malloc(count);
	if (!data)
		return NULL;

	byte[2] = '\0';
	for (i = 0; i < length; i += 2) {
		byte[0] = bytes[i];
		byte[1] = bytes[i + 1];
		data[i / 2] = (uint8_t)simple_strtoul(byte, NULL, 16);
	}

	if (count_ptr)
		*count_ptr = count;

	return data;
}

/**
 * Convert TPM command return code to U-Boot command error codes.
 *
 * @param return_code	TPM command return code
 * @return value of enum command_ret_t
 */
static int convert_return_code(uint32_t return_code)
{
	if (return_code)
		return CMD_RET_FAILURE;
	else
		return CMD_RET_SUCCESS;
}

/**
 * Return number of values defined by a type string.
 *
 * @param type_str	type string
 * @return number of values of type string
 */
static int type_string_get_num_values(const char *type_str)
{
	return strlen(type_str);
}

/**
 * Return total size of values defined by a type string.
 *
 * @param type_str	type string
 * @return total size of values of type string, or 0 if type string
 *  contains illegal type character.
 */
static size_t type_string_get_space_size(const char *type_str)
{
	size_t size;

	for (size = 0; *type_str; type_str++) {
		switch (*type_str) {
		case 'b':
			size += 1;
			break;
		case 'w':
			size += 2;
			break;
		case 'd':
			size += 4;
			break;
		default:
			return 0;
		}
	}

	return size;
}

/**
 * Allocate a buffer large enough to hold values defined by a type
 * string.  The caller has to free the buffer.
 *
 * @param type_str	type string
 * @param count		pointer for storing size of buffer
 * @return pointer to buffer or NULL on error
 */
static void *type_string_alloc(const char *type_str, uint32_t *count)
{
	void *data;
	size_t size;

	size = type_string_get_space_size(type_str);
	if (!size)
		return NULL;
	data = malloc(size);
	if (data)
		*count = size;

	return data;
}

/**
 * Pack values defined by a type string into a buffer.  The buffer must have
 * large enough space.
 *
 * @param type_str	type string
 * @param values	text strings of values to be packed
 * @param data		output buffer of values
 * @return 0 on success, non-0 on error
 */
static int type_string_pack(const char *type_str, char * const values[],
		uint8_t *data)
{
	size_t offset;
	uint32_t value;

	for (offset = 0; *type_str; type_str++, values++) {
		value = simple_strtoul(values[0], NULL, 0);
		switch (*type_str) {
		case 'b':
			data[offset] = value;
			offset += 1;
			break;
		case 'w':
			put_unaligned_be16(value, data + offset);
			offset += 2;
			break;
		case 'd':
			put_unaligned_be32(value, data + offset);
			offset += 4;
			break;
		default:
			return -1;
		}
	}

	return 0;
}

/**
 * Read values defined by a type string from a buffer, and write these values
 * to environment variables.
 *
 * @param type_str	type string
 * @param data		input buffer of values
 * @param vars		names of environment variables
 * @return 0 on success, non-0 on error
 */
static int type_string_write_vars(const char *type_str, uint8_t *data,
		char * const vars[])
{
	size_t offset;
	uint32_t value;

	for (offset = 0; *type_str; type_str++, vars++) {
		switch (*type_str) {
		case 'b':
			value = data[offset];
			offset += 1;
			break;
		case 'w':
			value = get_unaligned_be16(data + offset);
			offset += 2;
			break;
		case 'd':
			value = get_unaligned_be32(data + offset);
			offset += 4;
			break;
		default:
			return -1;
		}
		if (setenv_ulong(*vars, value))
			return -1;
	}

	return 0;
}

static int do_tpm_startup(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	enum tpm_startup_type mode;

	if (argc != 2)
		return CMD_RET_USAGE;
	if (!strcasecmp("TPM_ST_CLEAR", argv[1])) {
		mode = TPM_ST_CLEAR;
	} else if (!strcasecmp("TPM_ST_STATE", argv[1])) {
		mode = TPM_ST_STATE;
	} else if (!strcasecmp("TPM_ST_DEACTIVATED", argv[1])) {
		mode = TPM_ST_DEACTIVATED;
	} else {
		printf("Couldn't recognize mode string: %s\n", argv[1]);
		return CMD_RET_FAILURE;
	}

	return convert_return_code(tpm_startup(mode));
}

static int do_tpm_nv_define_space(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t index, perm, size;

	if (argc != 4)
		return CMD_RET_USAGE;
	index = simple_strtoul(argv[1], NULL, 0);
	perm = simple_strtoul(argv[2], NULL, 0);
	size = simple_strtoul(argv[3], NULL, 0);

	return convert_return_code(tpm_nv_define_space(index, perm, size));
}

static int do_tpm_nv_read_value(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t index, count, rc;
	void *data;

	if (argc != 4)
		return CMD_RET_USAGE;
	index = simple_strtoul(argv[1], NULL, 0);
	data = (void *)simple_strtoul(argv[2], NULL, 0);
	count = simple_strtoul(argv[3], NULL, 0);

	rc = tpm_nv_read_value(index, data, count);
	if (!rc) {
		puts("area content:\n");
		print_byte_string(data, count);
	}

	return convert_return_code(rc);
}

static int do_tpm_nv_write_value(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t index, rc;
	size_t count;
	void *data;

	if (argc != 3)
		return CMD_RET_USAGE;
	index = simple_strtoul(argv[1], NULL, 0);
	data = parse_byte_string(argv[2], NULL, &count);
	if (!data) {
		printf("Couldn't parse byte string %s\n", argv[2]);
		return CMD_RET_FAILURE;
	}

	rc = tpm_nv_write_value(index, data, count);
	free(data);

	return convert_return_code(rc);
}

static int do_tpm_extend(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t index, rc;
	uint8_t in_digest[20], out_digest[20];

	if (argc != 3)
		return CMD_RET_USAGE;
	index = simple_strtoul(argv[1], NULL, 0);
	if (!parse_byte_string(argv[2], in_digest, NULL)) {
		printf("Couldn't parse byte string %s\n", argv[2]);
		return CMD_RET_FAILURE;
	}

	rc = tpm_extend(index, in_digest, out_digest);
	if (!rc) {
		puts("PCR value after execution of the command:\n");
		print_byte_string(out_digest, sizeof(out_digest));
	}

	return convert_return_code(rc);
}

static int do_tpm_pcr_read(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t index, count, rc;
	void *data;

	if (argc != 4)
		return CMD_RET_USAGE;
	index = simple_strtoul(argv[1], NULL, 0);
	data = (void *)simple_strtoul(argv[2], NULL, 0);
	count = simple_strtoul(argv[3], NULL, 0);

	rc = tpm_pcr_read(index, data, count);
	if (!rc) {
		puts("Named PCR content:\n");
		print_byte_string(data, count);
	}

	return convert_return_code(rc);
}

static int do_tpm_tsc_physical_presence(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint16_t presence;

	if (argc != 2)
		return CMD_RET_USAGE;
	presence = (uint16_t)simple_strtoul(argv[1], NULL, 0);

	return convert_return_code(tpm_tsc_physical_presence(presence));
}

static int do_tpm_read_pubek(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t count, rc;
	void *data;

	if (argc != 3)
		return CMD_RET_USAGE;
	data = (void *)simple_strtoul(argv[1], NULL, 0);
	count = simple_strtoul(argv[2], NULL, 0);

	rc = tpm_read_pubek(data, count);
	if (!rc) {
		puts("pubek value:\n");
		print_byte_string(data, count);
	}

	return convert_return_code(rc);
}

static int do_tpm_physical_set_deactivated(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint8_t state;

	if (argc != 2)
		return CMD_RET_USAGE;
	state = (uint8_t)simple_strtoul(argv[1], NULL, 0);

	return convert_return_code(tpm_physical_set_deactivated(state));
}

static int do_tpm_get_capability(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t cap_area, sub_cap, rc;
	void *cap;
	size_t count;

	if (argc != 5)
		return CMD_RET_USAGE;
	cap_area = simple_strtoul(argv[1], NULL, 0);
	sub_cap = simple_strtoul(argv[2], NULL, 0);
	cap = (void *)simple_strtoul(argv[3], NULL, 0);
	count = simple_strtoul(argv[4], NULL, 0);

	rc = tpm_get_capability(cap_area, sub_cap, cap, count);
	if (!rc) {
		puts("capability information:\n");
		print_byte_string(cap, count);
	}

	return convert_return_code(rc);
}

#define TPM_COMMAND_NO_ARG(cmd)				\
static int do_##cmd(cmd_tbl_t *cmdtp, int flag,		\
		int argc, char * const argv[])		\
{							\
	if (argc != 1)					\
		return CMD_RET_USAGE;			\
	return convert_return_code(cmd());		\
}

TPM_COMMAND_NO_ARG(tpm_init)
TPM_COMMAND_NO_ARG(tpm_self_test_full)
TPM_COMMAND_NO_ARG(tpm_continue_self_test)
TPM_COMMAND_NO_ARG(tpm_force_clear)
TPM_COMMAND_NO_ARG(tpm_physical_enable)
TPM_COMMAND_NO_ARG(tpm_physical_disable)

static int do_tpm_raw_transfer(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	void *command;
	uint8_t response[1024];
	size_t count, response_length = sizeof(response);
	uint32_t rc;

	command = parse_byte_string(argv[1], NULL, &count);
	if (!command) {
		printf("Couldn't parse byte string %s\n", argv[1]);
		return CMD_RET_FAILURE;
	}

	rc = tis_sendrecv(command, count, response, &response_length);
	free(command);
	if (!rc) {
		puts("tpm response:\n");
		print_byte_string(response, response_length);
	}

	return convert_return_code(rc);
}

static int do_tpm_nv_define(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t index, perm, size;

	if (argc != 4)
		return CMD_RET_USAGE;
	size = type_string_get_space_size(argv[1]);
	if (!size) {
		printf("Couldn't parse arguments\n");
		return CMD_RET_USAGE;
	}
	index = simple_strtoul(argv[2], NULL, 0);
	perm = simple_strtoul(argv[3], NULL, 0);

	return convert_return_code(tpm_nv_define_space(index, perm, size));
}

static int do_tpm_nv_read(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t index, count, err;
	void *data;

	if (argc < 3)
		return CMD_RET_USAGE;
	if (argc != 3 + type_string_get_num_values(argv[1]))
		return CMD_RET_USAGE;
	index = simple_strtoul(argv[2], NULL, 0);
	data = type_string_alloc(argv[1], &count);
	if (!data) {
		printf("Couldn't parse arguments\n");
		return CMD_RET_USAGE;
	}

	err = tpm_nv_read_value(index, data, count);
	if (!err) {
		if (type_string_write_vars(argv[1], data, argv + 3)) {
			printf("Couldn't write to variables\n");
			err = ~0;
		}
	}
	free(data);

	return convert_return_code(err);
}

static int do_tpm_nv_write(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t index, count, err;
	void *data;

	if (argc < 3)
		return CMD_RET_USAGE;
	if (argc != 3 + type_string_get_num_values(argv[1]))
		return CMD_RET_USAGE;
	index = simple_strtoul(argv[2], NULL, 0);
	data = type_string_alloc(argv[1], &count);
	if (!data) {
		printf("Couldn't parse arguments\n");
		return CMD_RET_USAGE;
	}
	if (type_string_pack(argv[1], argv + 3, data)) {
		printf("Couldn't parse arguments\n");
		free(data);
		return CMD_RET_USAGE;
	}

	err = tpm_nv_write_value(index, data, count);
	free(data);

	return convert_return_code(err);
}

#ifdef CONFIG_TPM_AUTH_SESSIONS

static int do_tpm_oiap(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t auth_handle, err;

	err = tpm_oiap(&auth_handle);

	return convert_return_code(err);
}

static int do_tpm_load_key2_oiap(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t parent_handle, key_len, key_handle, err;
	uint8_t usage_auth[DIGEST_LENGTH];
	void *key;

	if (argc < 5)
		return CMD_RET_USAGE;

	parent_handle = simple_strtoul(argv[1], NULL, 0);
	key = (void *)simple_strtoul(argv[2], NULL, 0);
	key_len = simple_strtoul(argv[3], NULL, 0);
	if (strlen(argv[4]) != 2 * DIGEST_LENGTH)
		return CMD_RET_FAILURE;
	parse_byte_string(argv[4], usage_auth, NULL);

	err = tpm_load_key2_oiap(parent_handle, key, key_len, usage_auth,
			&key_handle);
	if (!err)
		printf("Key handle is 0x%x\n", key_handle);

	return convert_return_code(err);
}

static int do_tpm_get_pub_key_oiap(cmd_tbl_t *cmdtp, int flag,
		int argc, char * const argv[])
{
	uint32_t key_handle, err;
	uint8_t usage_auth[DIGEST_LENGTH];
	uint8_t pub_key_buffer[TPM_PUBKEY_MAX_LENGTH];
	size_t pub_key_len = sizeof(pub_key_buffer);

	if (argc < 3)
		return CMD_RET_USAGE;

	key_handle = simple_strtoul(argv[1], NULL, 0);
	if (strlen(argv[2]) != 2 * DIGEST_LENGTH)
		return CMD_RET_FAILURE;
	parse_byte_string(argv[2], usage_auth, NULL);

	err = tpm_get_pub_key_oiap(key_handle, usage_auth,
			pub_key_buffer, &pub_key_len);
	if (!err) {
		printf("dump of received pub key structure:\n");
		print_byte_string(pub_key_buffer, pub_key_len);
	}
	return convert_return_code(err);
}

TPM_COMMAND_NO_ARG(tpm_end_oiap)

#endif /* CONFIG_TPM_AUTH_SESSIONS */

#define MAKE_TPM_CMD_ENTRY(cmd) \
	U_BOOT_CMD_MKENT(cmd, 0, 1, do_tpm_ ## cmd, "", "")

static cmd_tbl_t tpm_commands[] = {
	U_BOOT_CMD_MKENT(init, 0, 1,
			do_tpm_init, "", ""),
	U_BOOT_CMD_MKENT(startup, 0, 1,
			do_tpm_startup, "", ""),
	U_BOOT_CMD_MKENT(self_test_full, 0, 1,
			do_tpm_self_test_full, "", ""),
	U_BOOT_CMD_MKENT(continue_self_test, 0, 1,
			do_tpm_continue_self_test, "", ""),
	U_BOOT_CMD_MKENT(force_clear, 0, 1,
			do_tpm_force_clear, "", ""),
	U_BOOT_CMD_MKENT(physical_enable, 0, 1,
			do_tpm_physical_enable, "", ""),
	U_BOOT_CMD_MKENT(physical_disable, 0, 1,
			do_tpm_physical_disable, "", ""),
	U_BOOT_CMD_MKENT(nv_define_space, 0, 1,
			do_tpm_nv_define_space, "", ""),
	U_BOOT_CMD_MKENT(nv_read_value, 0, 1,
			do_tpm_nv_read_value, "", ""),
	U_BOOT_CMD_MKENT(nv_write_value, 0, 1,
			do_tpm_nv_write_value, "", ""),
	U_BOOT_CMD_MKENT(extend, 0, 1,
			do_tpm_extend, "", ""),
	U_BOOT_CMD_MKENT(pcr_read, 0, 1,
			do_tpm_pcr_read, "", ""),
	U_BOOT_CMD_MKENT(tsc_physical_presence, 0, 1,
			do_tpm_tsc_physical_presence, "", ""),
	U_BOOT_CMD_MKENT(read_pubek, 0, 1,
			do_tpm_read_pubek, "", ""),
	U_BOOT_CMD_MKENT(physical_set_deactivated, 0, 1,
			do_tpm_physical_set_deactivated, "", ""),
	U_BOOT_CMD_MKENT(get_capability, 0, 1,
			do_tpm_get_capability, "", ""),
	U_BOOT_CMD_MKENT(raw_transfer, 0, 1,
			do_tpm_raw_transfer, "", ""),
	U_BOOT_CMD_MKENT(nv_define, 0, 1,
			do_tpm_nv_define, "", ""),
	U_BOOT_CMD_MKENT(nv_read, 0, 1,
			do_tpm_nv_read, "", ""),
	U_BOOT_CMD_MKENT(nv_write, 0, 1,
			do_tpm_nv_write, "", ""),
#ifdef CONFIG_TPM_AUTH_SESSIONS
	U_BOOT_CMD_MKENT(oiap, 0, 1,
			 do_tpm_oiap, "", ""),
	U_BOOT_CMD_MKENT(end_oiap, 0, 1,
			 do_tpm_end_oiap, "", ""),
	U_BOOT_CMD_MKENT(load_key2_oiap, 0, 1,
			 do_tpm_load_key2_oiap, "", ""),
	U_BOOT_CMD_MKENT(get_pub_key_oiap, 0, 1,
			 do_tpm_get_pub_key_oiap, "", ""),
#endif /* CONFIG_TPM_AUTH_SESSIONS */
};

static int do_tpm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	cmd_tbl_t *tpm_cmd;

	if (argc < 2)
		return CMD_RET_USAGE;
	tpm_cmd = find_cmd_tbl(argv[1], tpm_commands, ARRAY_SIZE(tpm_commands));
	if (!tpm_cmd)
		return CMD_RET_USAGE;

	return tpm_cmd->cmd(cmdtp, flag, argc - 1, argv + 1);
}

U_BOOT_CMD(tpm, CONFIG_SYS_MAXARGS, 1, do_tpm,
"Issue a TPM command",
"cmd args...\n"
"    - Issue TPM command <cmd> with arguments <args...>.\n"
"Admin Startup and State Commands:\n"
"  init\n"
"    - Put TPM into a state where it waits for 'startup' command.\n"
"  startup mode\n"
"    - Issue TPM_Starup command.  <mode> is one of TPM_ST_CLEAR,\n"
"      TPM_ST_STATE, and TPM_ST_DEACTIVATED.\n"
"Admin Testing Commands:\n"
"  self_test_full\n"
"    - Test all of the TPM capabilities.\n"
"  continue_self_test\n"
"    - Inform TPM that it should complete the self-test.\n"
"Admin Opt-in Commands:\n"
"  physical_enable\n"
"    - Set the PERMANENT disable flag to FALSE using physical presence as\n"
"      authorization.\n"
"  physical_disable\n"
"    - Set the PERMANENT disable flag to TRUE using physical presence as\n"
"      authorization.\n"
"  physical_set_deactivated 0|1\n"
"    - Set deactivated flag.\n"
"Admin Ownership Commands:\n"
"  force_clear\n"
"    - Issue TPM_ForceClear command.\n"
"  tsc_physical_presence flags\n"
"    - Set TPM device's Physical Presence flags to <flags>.\n"
"The Capability Commands:\n"
"  get_capability cap_area sub_cap addr count\n"
"    - Read <count> bytes of TPM capability indexed by <cap_area> and\n"
"      <sub_cap> to memory address <addr>.\n"
#ifdef CONFIG_TPM_AUTH_SESSIONS
"Storage functions\n"
"  loadkey2_oiap parent_handle key_addr key_len usage_auth\n"
"    - loads a key data from memory address <key_addr>, <key_len> bytes\n"
"      into TPM using the parent key <parent_handle> with authorization\n"
"      <usage_auth> (20 bytes hex string).\n"
"  get_pub_key_oiap key_handle usage_auth\n"
"    - get the public key portion of a loaded key <key_handle> using\n"
"      authorization <usage auth> (20 bytes hex string)\n"
#endif /* CONFIG_TPM_AUTH_SESSIONS */
"Endorsement Key Handling Commands:\n"
"  read_pubek addr count\n"
"    - Read <count> bytes of the public endorsement key to memory\n"
"      address <addr>\n"
"Integrity Collection and Reporting Commands:\n"
"  extend index digest_hex_string\n"
"    - Add a new measurement to a PCR.  Update PCR <index> with the 20-bytes\n"
"      <digest_hex_string>\n"
"  pcr_read index addr count\n"
"    - Read <count> bytes from PCR <index> to memory address <addr>.\n"
#ifdef CONFIG_TPM_AUTH_SESSIONS
"Authorization Sessions\n"
"  oiap\n"
"    - setup an OIAP session\n"
"  end_oiap\n"
"    - terminates an active OIAP session\n"
#endif /* CONFIG_TPM_AUTH_SESSIONS */
"Non-volatile Storage Commands:\n"
"  nv_define_space index permission size\n"
"    - Establish a space at index <index> with <permission> of <size> bytes.\n"
"  nv_read_value index addr count\n"
"    - Read <count> bytes from space <index> to memory address <addr>.\n"
"  nv_write_value index addr count\n"
"    - Write <count> bytes from memory address <addr> to space <index>.\n"
"Miscellaneous helper functions:\n"
"  raw_transfer byte_string\n"
"    - Send a byte string <byte_string> to TPM and print the response.\n"
" Non-volatile storage helper functions:\n"
"    These helper functions treat a non-volatile space as a non-padded\n"
"    sequence of integer values.  These integer values are defined by a type\n"
"    string, which is a text string of 'bwd' characters: 'b' means a 8-bit\n"
"    value, 'w' 16-bit value, 'd' 32-bit value.  All helper functions take\n"
"    a type string as their first argument.\n"
"  nv_define type_string index perm\n"
"    - Define a space <index> with permission <perm>.\n"
"  nv_read types_string index vars...\n"
"    - Read from space <index> to environment variables <vars...>.\n"
"  nv_write types_string index values...\n"
"    - Write to space <index> from values <values...>.\n"
);