1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2018, Linaro Limited
6 #include <avb_verify.h>
13 #define AVB_BOOTARGS "avb_bootargs"
15 static struct AvbOps *avb_ops;
17 int do_avb_init(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
19 unsigned long mmc_dev;
24 mmc_dev = hextoul(argv[1], NULL);
27 avb_ops_free(avb_ops);
29 avb_ops = avb_ops_alloc(mmc_dev);
31 return CMD_RET_SUCCESS;
33 printf("Can't allocate AvbOps");
35 printf("Failed to initialize AVB\n");
37 return CMD_RET_FAILURE;
40 int do_avb_read_part(struct cmd_tbl *cmdtp, int flag, int argc,
45 size_t bytes, bytes_read = 0;
50 printf("AVB is not initialized, please run 'avb init <id>'\n");
51 return CMD_RET_FAILURE;
58 offset = hextoul(argv[2], NULL);
59 bytes = hextoul(argv[3], NULL);
60 buffer = (void *)hextoul(argv[4], NULL);
62 ret = avb_ops->read_from_partition(avb_ops, part, offset,
63 bytes, buffer, &bytes_read);
64 if (ret == AVB_IO_RESULT_OK) {
65 printf("Read %zu bytes\n", bytes_read);
66 return CMD_RET_SUCCESS;
69 printf("Failed to read from partition '%s', err = %d\n",
72 return CMD_RET_FAILURE;
75 int do_avb_read_part_hex(struct cmd_tbl *cmdtp, int flag, int argc,
80 size_t bytes, bytes_read = 0;
85 printf("AVB is not initialized, please run 'avb init <id>'\n");
86 return CMD_RET_FAILURE;
93 offset = hextoul(argv[2], NULL);
94 bytes = hextoul(argv[3], NULL);
96 buffer = malloc(bytes);
98 printf("Failed to tlb_allocate buffer for data\n");
99 return CMD_RET_FAILURE;
101 memset(buffer, 0, bytes);
103 ret = avb_ops->read_from_partition(avb_ops, part, offset,
104 bytes, buffer, &bytes_read);
105 if (ret == AVB_IO_RESULT_OK) {
106 printf("Requested %zu, read %zu bytes\n", bytes, bytes_read);
108 for (int i = 0; i < bytes_read; i++)
109 printf("%02X", buffer[i]);
114 return CMD_RET_SUCCESS;
117 printf("Failed to read from partition '%s', err = %d\n",
121 return CMD_RET_FAILURE;
124 int do_avb_write_part(struct cmd_tbl *cmdtp, int flag, int argc,
134 printf("AVB is not initialized, please run 'avb init <id>'\n");
135 return CMD_RET_FAILURE;
139 return CMD_RET_USAGE;
142 offset = hextoul(argv[2], NULL);
143 bytes = hextoul(argv[3], NULL);
144 buffer = (void *)hextoul(argv[4], NULL);
146 ret = avb_ops->write_to_partition(avb_ops, part, offset,
148 if (ret == AVB_IO_RESULT_OK) {
149 printf("Wrote %zu bytes\n", bytes);
150 return CMD_RET_SUCCESS;
153 printf("Failed to write in partition '%s', err = %d\n",
156 return CMD_RET_FAILURE;
159 int do_avb_read_rb(struct cmd_tbl *cmdtp, int flag, int argc,
167 printf("AVB is not initialized, please run 'avb init <id>'\n");
168 return CMD_RET_FAILURE;
172 return CMD_RET_USAGE;
174 index = (size_t)hextoul(argv[1], NULL);
176 ret = avb_ops->read_rollback_index(avb_ops, index, &rb_idx);
177 if (ret == AVB_IO_RESULT_OK) {
178 printf("Rollback index: %llx\n", rb_idx);
179 return CMD_RET_SUCCESS;
182 printf("Failed to read rollback index id = %zu, err = %d\n",
185 return CMD_RET_FAILURE;
188 int do_avb_write_rb(struct cmd_tbl *cmdtp, int flag, int argc,
196 printf("AVB is not initialized, please run 'avb init <id>'\n");
197 return CMD_RET_FAILURE;
201 return CMD_RET_USAGE;
203 index = (size_t)hextoul(argv[1], NULL);
204 rb_idx = hextoul(argv[2], NULL);
206 ret = avb_ops->write_rollback_index(avb_ops, index, rb_idx);
207 if (ret == AVB_IO_RESULT_OK)
208 return CMD_RET_SUCCESS;
210 printf("Failed to write rollback index id = %zu, err = %d\n",
213 return CMD_RET_FAILURE;
216 int do_avb_get_uuid(struct cmd_tbl *cmdtp, int flag,
217 int argc, char *const argv[])
220 char buffer[UUID_STR_LEN + 1];
224 printf("AVB is not initialized, please run 'avb init <id>'\n");
225 return CMD_RET_FAILURE;
229 return CMD_RET_USAGE;
233 ret = avb_ops->get_unique_guid_for_partition(avb_ops, part,
236 if (ret == AVB_IO_RESULT_OK) {
237 printf("'%s' UUID: %s\n", part, buffer);
238 return CMD_RET_SUCCESS;
241 printf("Failed to read partition '%s' UUID, err = %d\n",
244 return CMD_RET_FAILURE;
247 int do_avb_verify_part(struct cmd_tbl *cmdtp, int flag,
248 int argc, char *const argv[])
250 const char * const requested_partitions[] = {"boot", NULL};
251 AvbSlotVerifyResult slot_result;
252 AvbSlotVerifyData *out_data;
253 enum avb_boot_state boot_state;
256 char *slot_suffix = "";
259 bool unlocked = false;
260 int res = CMD_RET_FAILURE;
263 printf("AVB is not initialized, please run 'avb init <id>'\n");
264 return CMD_RET_FAILURE;
267 if (argc < 1 || argc > 2)
268 return CMD_RET_USAGE;
271 slot_suffix = argv[1];
273 printf("## Android Verified Boot 2.0 version %s\n",
274 avb_version_string());
276 ret = avb_ops->read_is_device_unlocked(avb_ops, &unlocked);
277 if (ret != AVB_IO_RESULT_OK) {
278 printf("Can't determine device lock state, err = %d\n",
280 return CMD_RET_FAILURE;
284 avb_slot_verify(avb_ops,
285 requested_partitions,
288 AVB_HASHTREE_ERROR_MODE_RESTART_AND_INVALIDATE,
292 * LOCKED devices with custom root of trust setup is not supported (YELLOW)
294 if (slot_result == AVB_SLOT_VERIFY_RESULT_OK) {
295 printf("Verification passed successfully\n");
298 * ORANGE state indicates that device may be freely modified.
299 * Device integrity is left to the user to verify out-of-band.
302 boot_state = AVB_ORANGE;
304 boot_state = AVB_GREEN;
306 /* export boot state to AVB_BOOTARGS env var */
307 extra_args = avb_set_state(avb_ops, boot_state);
309 cmdline = append_cmd_line(out_data->cmdline,
312 cmdline = out_data->cmdline;
314 env_set(AVB_BOOTARGS, cmdline);
316 res = CMD_RET_SUCCESS;
318 printf("Verification failed, reason: %s\n", str_avb_slot_error(slot_result));
322 avb_slot_verify_data_free(out_data);
327 int do_avb_is_unlocked(struct cmd_tbl *cmdtp, int flag,
328 int argc, char *const argv[])
334 printf("AVB is not initialized, please run 'avb init <id>'\n");
335 return CMD_RET_FAILURE;
339 printf("--%s(-1)\n", __func__);
340 return CMD_RET_USAGE;
343 ret = avb_ops->read_is_device_unlocked(avb_ops, &unlock);
344 if (ret == AVB_IO_RESULT_OK) {
345 printf("Unlocked = %d\n", unlock);
346 return CMD_RET_SUCCESS;
349 printf("Can't determine device lock state, err = %d\n",
352 return CMD_RET_FAILURE;
355 int do_avb_read_pvalue(struct cmd_tbl *cmdtp, int flag, int argc,
366 printf("AVB is not initialized, please run 'avb init <id>'\n");
367 return CMD_RET_FAILURE;
371 return CMD_RET_USAGE;
374 bytes = dectoul(argv[2], &endp);
375 if (*endp && *endp != '\n')
376 return CMD_RET_USAGE;
378 buffer = malloc(bytes);
380 return CMD_RET_FAILURE;
382 ret = avb_ops->read_persistent_value(avb_ops, name, bytes,
383 buffer, &bytes_read);
384 if (ret == AVB_IO_RESULT_OK) {
385 printf("Read %zu bytes, value = %s\n", bytes_read,
388 return CMD_RET_SUCCESS;
391 printf("Failed to read persistent value, err = %d\n", ret);
395 return CMD_RET_FAILURE;
398 int do_avb_write_pvalue(struct cmd_tbl *cmdtp, int flag, int argc,
406 printf("AVB is not initialized, please run 'avb init <id>'\n");
407 return CMD_RET_FAILURE;
411 return CMD_RET_USAGE;
416 ret = avb_ops->write_persistent_value(avb_ops, name,
418 (const uint8_t *)value);
419 if (ret == AVB_IO_RESULT_OK) {
420 printf("Wrote %zu bytes\n", strlen(value) + 1);
421 return CMD_RET_SUCCESS;
424 printf("Failed to write persistent value `%s` = `%s`, err = %d\n",
427 return CMD_RET_FAILURE;
430 static struct cmd_tbl cmd_avb[] = {
431 U_BOOT_CMD_MKENT(init, 2, 0, do_avb_init, "", ""),
432 U_BOOT_CMD_MKENT(read_rb, 2, 0, do_avb_read_rb, "", ""),
433 U_BOOT_CMD_MKENT(write_rb, 3, 0, do_avb_write_rb, "", ""),
434 U_BOOT_CMD_MKENT(is_unlocked, 1, 0, do_avb_is_unlocked, "", ""),
435 U_BOOT_CMD_MKENT(get_uuid, 2, 0, do_avb_get_uuid, "", ""),
436 U_BOOT_CMD_MKENT(read_part, 5, 0, do_avb_read_part, "", ""),
437 U_BOOT_CMD_MKENT(read_part_hex, 4, 0, do_avb_read_part_hex, "", ""),
438 U_BOOT_CMD_MKENT(write_part, 5, 0, do_avb_write_part, "", ""),
439 U_BOOT_CMD_MKENT(verify, 2, 0, do_avb_verify_part, "", ""),
440 #ifdef CONFIG_OPTEE_TA_AVB
441 U_BOOT_CMD_MKENT(read_pvalue, 3, 0, do_avb_read_pvalue, "", ""),
442 U_BOOT_CMD_MKENT(write_pvalue, 3, 0, do_avb_write_pvalue, "", ""),
446 static int do_avb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
450 cp = find_cmd_tbl(argv[1], cmd_avb, ARRAY_SIZE(cmd_avb));
455 if (!cp || argc > cp->maxargs)
456 return CMD_RET_USAGE;
458 if (flag == CMD_FLAG_REPEAT)
459 return CMD_RET_FAILURE;
461 return cp->cmd(cmdtp, flag, argc, argv);
466 "Provides commands for testing Android Verified Boot 2.0 functionality",
467 "init <dev> - initialize avb2 for <dev>\n"
468 "avb read_rb <num> - read rollback index at location <num>\n"
469 "avb write_rb <num> <rb> - write rollback index <rb> to <num>\n"
470 "avb is_unlocked - returns unlock status of the device\n"
471 "avb get_uuid <partname> - read and print uuid of partition <part>\n"
472 "avb read_part <partname> <offset> <num> <addr> - read <num> bytes from\n"
473 " partition <partname> to buffer <addr>\n"
474 "avb read_part_hex <partname> <offset> <num> - read <num> bytes from\n"
475 " partition <partname> and print to stdout\n"
476 "avb write_part <partname> <offset> <num> <addr> - write <num> bytes to\n"
477 " <partname> by <offset> using data from <addr>\n"
478 #ifdef CONFIG_OPTEE_TA_AVB
479 "avb read_pvalue <name> <bytes> - read a persistent value <name>\n"
480 "avb write_pvalue <name> <value> - write a persistent value <name>\n"
482 "avb verify [slot_suffix] - run verification process using hash data\n"
483 " from vbmeta structure\n"
484 " [slot_suffix] - _a, _b, etc (if vbmeta partition is slotted)\n"