9fb625ce05
Move env_set() over to the new header file. Acked-by: Joe Hershberger <joe.hershberger@ni.com> Signed-off-by: Simon Glass <sjg@chromium.org>
469 lines
11 KiB
C
469 lines
11 KiB
C
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/*
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* (C) Copyright 2018, Linaro Limited
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <avb_verify.h>
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#include <command.h>
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#include <env.h>
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#include <image.h>
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#include <malloc.h>
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#include <mmc.h>
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#define AVB_BOOTARGS "avb_bootargs"
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static struct AvbOps *avb_ops;
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static const char * const requested_partitions[] = {"boot",
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"system",
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"vendor",
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NULL};
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int do_avb_init(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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unsigned long mmc_dev;
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if (argc != 2)
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return CMD_RET_USAGE;
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mmc_dev = simple_strtoul(argv[1], NULL, 16);
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if (avb_ops)
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avb_ops_free(avb_ops);
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avb_ops = avb_ops_alloc(mmc_dev);
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if (avb_ops)
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return CMD_RET_SUCCESS;
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printf("Failed to initialize avb2\n");
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return CMD_RET_FAILURE;
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}
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int do_avb_read_part(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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const char *part;
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s64 offset;
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size_t bytes, bytes_read = 0;
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void *buffer;
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if (!avb_ops) {
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printf("AVB 2.0 is not initialized, please run 'avb init'\n");
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return CMD_RET_USAGE;
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}
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if (argc != 5)
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return CMD_RET_USAGE;
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part = argv[1];
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offset = simple_strtoul(argv[2], NULL, 16);
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bytes = simple_strtoul(argv[3], NULL, 16);
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buffer = (void *)simple_strtoul(argv[4], NULL, 16);
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if (avb_ops->read_from_partition(avb_ops, part, offset, bytes,
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buffer, &bytes_read) ==
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AVB_IO_RESULT_OK) {
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printf("Read %zu bytes\n", bytes_read);
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return CMD_RET_SUCCESS;
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}
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printf("Failed to read from partition\n");
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return CMD_RET_FAILURE;
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}
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int do_avb_read_part_hex(cmd_tbl_t *cmdtp, int flag, int argc,
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char *const argv[])
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{
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const char *part;
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s64 offset;
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size_t bytes, bytes_read = 0;
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char *buffer;
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if (!avb_ops) {
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printf("AVB 2.0 is not initialized, please run 'avb init'\n");
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return CMD_RET_USAGE;
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}
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if (argc != 4)
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return CMD_RET_USAGE;
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part = argv[1];
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offset = simple_strtoul(argv[2], NULL, 16);
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bytes = simple_strtoul(argv[3], NULL, 16);
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buffer = malloc(bytes);
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if (!buffer) {
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printf("Failed to tlb_allocate buffer for data\n");
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return CMD_RET_FAILURE;
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}
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memset(buffer, 0, bytes);
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if (avb_ops->read_from_partition(avb_ops, part, offset, bytes, buffer,
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&bytes_read) == AVB_IO_RESULT_OK) {
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printf("Requested %zu, read %zu bytes\n", bytes, bytes_read);
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printf("Data: ");
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for (int i = 0; i < bytes_read; i++)
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printf("%02X", buffer[i]);
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printf("\n");
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free(buffer);
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return CMD_RET_SUCCESS;
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}
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printf("Failed to read from partition\n");
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free(buffer);
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return CMD_RET_FAILURE;
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}
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int do_avb_write_part(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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const char *part;
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s64 offset;
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size_t bytes;
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void *buffer;
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if (!avb_ops) {
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printf("AVB 2.0 is not initialized, run 'avb init' first\n");
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return CMD_RET_FAILURE;
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}
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if (argc != 5)
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return CMD_RET_USAGE;
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part = argv[1];
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offset = simple_strtoul(argv[2], NULL, 16);
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bytes = simple_strtoul(argv[3], NULL, 16);
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buffer = (void *)simple_strtoul(argv[4], NULL, 16);
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if (avb_ops->write_to_partition(avb_ops, part, offset, bytes, buffer) ==
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AVB_IO_RESULT_OK) {
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printf("Wrote %zu bytes\n", bytes);
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return CMD_RET_SUCCESS;
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}
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printf("Failed to write in partition\n");
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return CMD_RET_FAILURE;
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}
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int do_avb_read_rb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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size_t index;
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u64 rb_idx;
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if (!avb_ops) {
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printf("AVB 2.0 is not initialized, run 'avb init' first\n");
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return CMD_RET_FAILURE;
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}
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if (argc != 2)
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return CMD_RET_USAGE;
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index = (size_t)simple_strtoul(argv[1], NULL, 16);
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if (avb_ops->read_rollback_index(avb_ops, index, &rb_idx) ==
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AVB_IO_RESULT_OK) {
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printf("Rollback index: %llx\n", rb_idx);
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return CMD_RET_SUCCESS;
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}
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printf("Failed to read rollback index\n");
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return CMD_RET_FAILURE;
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}
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int do_avb_write_rb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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size_t index;
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u64 rb_idx;
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if (!avb_ops) {
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printf("AVB 2.0 is not initialized, run 'avb init' first\n");
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return CMD_RET_FAILURE;
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}
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if (argc != 3)
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return CMD_RET_USAGE;
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index = (size_t)simple_strtoul(argv[1], NULL, 16);
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rb_idx = simple_strtoul(argv[2], NULL, 16);
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if (avb_ops->write_rollback_index(avb_ops, index, rb_idx) ==
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AVB_IO_RESULT_OK)
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return CMD_RET_SUCCESS;
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printf("Failed to write rollback index\n");
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return CMD_RET_FAILURE;
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}
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int do_avb_get_uuid(cmd_tbl_t *cmdtp, int flag,
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int argc, char * const argv[])
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{
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const char *part;
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char buffer[UUID_STR_LEN + 1];
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if (!avb_ops) {
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printf("AVB 2.0 is not initialized, run 'avb init' first\n");
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return CMD_RET_FAILURE;
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}
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if (argc != 2)
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return CMD_RET_USAGE;
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part = argv[1];
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if (avb_ops->get_unique_guid_for_partition(avb_ops, part, buffer,
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UUID_STR_LEN + 1) ==
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AVB_IO_RESULT_OK) {
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printf("'%s' UUID: %s\n", part, buffer);
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return CMD_RET_SUCCESS;
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}
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printf("Failed to read UUID\n");
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return CMD_RET_FAILURE;
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}
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int do_avb_verify_part(cmd_tbl_t *cmdtp, int flag,
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int argc, char *const argv[])
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{
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AvbSlotVerifyResult slot_result;
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AvbSlotVerifyData *out_data;
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char *cmdline;
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char *extra_args;
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bool unlocked = false;
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int res = CMD_RET_FAILURE;
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if (!avb_ops) {
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printf("AVB 2.0 is not initialized, run 'avb init' first\n");
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return CMD_RET_FAILURE;
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}
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if (argc != 1)
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return CMD_RET_USAGE;
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printf("## Android Verified Boot 2.0 version %s\n",
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avb_version_string());
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if (avb_ops->read_is_device_unlocked(avb_ops, &unlocked) !=
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AVB_IO_RESULT_OK) {
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printf("Can't determine device lock state.\n");
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return CMD_RET_FAILURE;
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}
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slot_result =
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avb_slot_verify(avb_ops,
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requested_partitions,
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"",
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unlocked,
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AVB_HASHTREE_ERROR_MODE_RESTART_AND_INVALIDATE,
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&out_data);
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switch (slot_result) {
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case AVB_SLOT_VERIFY_RESULT_OK:
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/* Until we don't have support of changing unlock states, we
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* assume that we are by default in locked state.
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* So in this case we can boot only when verification is
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* successful; we also supply in cmdline GREEN boot state
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*/
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printf("Verification passed successfully\n");
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/* export additional bootargs to AVB_BOOTARGS env var */
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extra_args = avb_set_state(avb_ops, AVB_GREEN);
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if (extra_args)
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cmdline = append_cmd_line(out_data->cmdline,
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extra_args);
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else
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cmdline = out_data->cmdline;
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env_set(AVB_BOOTARGS, cmdline);
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res = CMD_RET_SUCCESS;
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break;
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case AVB_SLOT_VERIFY_RESULT_ERROR_VERIFICATION:
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printf("Verification failed\n");
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break;
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case AVB_SLOT_VERIFY_RESULT_ERROR_IO:
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printf("I/O error occurred during verification\n");
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break;
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case AVB_SLOT_VERIFY_RESULT_ERROR_OOM:
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printf("OOM error occurred during verification\n");
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break;
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case AVB_SLOT_VERIFY_RESULT_ERROR_INVALID_METADATA:
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printf("Corrupted dm-verity metadata detected\n");
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break;
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case AVB_SLOT_VERIFY_RESULT_ERROR_UNSUPPORTED_VERSION:
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printf("Unsupported version avbtool was used\n");
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break;
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case AVB_SLOT_VERIFY_RESULT_ERROR_ROLLBACK_INDEX:
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printf("Checking rollback index failed\n");
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break;
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case AVB_SLOT_VERIFY_RESULT_ERROR_PUBLIC_KEY_REJECTED:
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printf("Public key was rejected\n");
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break;
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default:
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printf("Unknown error occurred\n");
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}
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return res;
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}
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int do_avb_is_unlocked(cmd_tbl_t *cmdtp, int flag,
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int argc, char * const argv[])
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{
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bool unlock;
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if (!avb_ops) {
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printf("AVB not initialized, run 'avb init' first\n");
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return CMD_RET_FAILURE;
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}
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if (argc != 1) {
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printf("--%s(-1)\n", __func__);
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return CMD_RET_USAGE;
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}
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if (avb_ops->read_is_device_unlocked(avb_ops, &unlock) ==
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AVB_IO_RESULT_OK) {
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printf("Unlocked = %d\n", unlock);
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return CMD_RET_SUCCESS;
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}
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printf("Can't determine device lock state.\n");
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return CMD_RET_FAILURE;
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}
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int do_avb_read_pvalue(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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const char *name;
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size_t bytes;
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size_t bytes_read;
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void *buffer;
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char *endp;
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if (!avb_ops) {
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printf("AVB 2.0 is not initialized, run 'avb init' first\n");
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return CMD_RET_FAILURE;
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}
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if (argc != 3)
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return CMD_RET_USAGE;
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name = argv[1];
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bytes = simple_strtoul(argv[2], &endp, 10);
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if (*endp && *endp != '\n')
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return CMD_RET_USAGE;
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buffer = malloc(bytes);
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if (!buffer)
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return CMD_RET_FAILURE;
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if (avb_ops->read_persistent_value(avb_ops, name, bytes, buffer,
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&bytes_read) == AVB_IO_RESULT_OK) {
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printf("Read %zu bytes, value = %s\n", bytes_read,
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(char *)buffer);
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free(buffer);
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return CMD_RET_SUCCESS;
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}
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printf("Failed to read persistent value\n");
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free(buffer);
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return CMD_RET_FAILURE;
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}
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int do_avb_write_pvalue(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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const char *name;
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const char *value;
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if (!avb_ops) {
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printf("AVB 2.0 is not initialized, run 'avb init' first\n");
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return CMD_RET_FAILURE;
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}
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if (argc != 3)
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return CMD_RET_USAGE;
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name = argv[1];
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value = argv[2];
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if (avb_ops->write_persistent_value(avb_ops, name, strlen(value) + 1,
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(const uint8_t *)value) ==
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AVB_IO_RESULT_OK) {
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printf("Wrote %zu bytes\n", strlen(value) + 1);
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return CMD_RET_SUCCESS;
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}
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printf("Failed to write persistent value\n");
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return CMD_RET_FAILURE;
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}
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static cmd_tbl_t cmd_avb[] = {
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U_BOOT_CMD_MKENT(init, 2, 0, do_avb_init, "", ""),
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U_BOOT_CMD_MKENT(read_rb, 2, 0, do_avb_read_rb, "", ""),
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U_BOOT_CMD_MKENT(write_rb, 3, 0, do_avb_write_rb, "", ""),
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U_BOOT_CMD_MKENT(is_unlocked, 1, 0, do_avb_is_unlocked, "", ""),
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U_BOOT_CMD_MKENT(get_uuid, 2, 0, do_avb_get_uuid, "", ""),
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U_BOOT_CMD_MKENT(read_part, 5, 0, do_avb_read_part, "", ""),
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U_BOOT_CMD_MKENT(read_part_hex, 4, 0, do_avb_read_part_hex, "", ""),
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U_BOOT_CMD_MKENT(write_part, 5, 0, do_avb_write_part, "", ""),
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U_BOOT_CMD_MKENT(verify, 1, 0, do_avb_verify_part, "", ""),
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#ifdef CONFIG_OPTEE_TA_AVB
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U_BOOT_CMD_MKENT(read_pvalue, 3, 0, do_avb_read_pvalue, "", ""),
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U_BOOT_CMD_MKENT(write_pvalue, 3, 0, do_avb_write_pvalue, "", ""),
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#endif
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};
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static int do_avb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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cmd_tbl_t *cp;
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cp = find_cmd_tbl(argv[1], cmd_avb, ARRAY_SIZE(cmd_avb));
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argc--;
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argv++;
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if (!cp || argc > cp->maxargs)
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return CMD_RET_USAGE;
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if (flag == CMD_FLAG_REPEAT)
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return CMD_RET_FAILURE;
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return cp->cmd(cmdtp, flag, argc, argv);
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}
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U_BOOT_CMD(
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avb, 29, 0, do_avb,
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"Provides commands for testing Android Verified Boot 2.0 functionality",
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"init <dev> - initialize avb2 for <dev>\n"
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"avb read_rb <num> - read rollback index at location <num>\n"
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"avb write_rb <num> <rb> - write rollback index <rb> to <num>\n"
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"avb is_unlocked - returns unlock status of the device\n"
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"avb get_uuid <partname> - read and print uuid of partition <part>\n"
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"avb read_part <partname> <offset> <num> <addr> - read <num> bytes from\n"
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" partition <partname> to buffer <addr>\n"
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"avb read_part_hex <partname> <offset> <num> - read <num> bytes from\n"
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" partition <partname> and print to stdout\n"
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"avb write_part <partname> <offset> <num> <addr> - write <num> bytes to\n"
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" <partname> by <offset> using data from <addr>\n"
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#ifdef CONFIG_OPTEE_TA_AVB
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"avb read_pvalue <name> <bytes> - read a persistent value <name>\n"
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"avb write_pvalue <name> <value> - write a persistent value <name>\n"
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#endif
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"avb verify - run verification process using hash data\n"
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" from vbmeta structure\n"
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);
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