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/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Routines for verifying a kernel or disk image
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "host_common.h"
#include "util_misc.h"
#include "vboot_common.h"
#include "vboot_api.h"
#include "vboot_kernel.h"
static uint8_t *diskbuf;
static uint8_t shared_data[VB_SHARED_DATA_MIN_SIZE];
static VbSharedDataHeader *shared = (VbSharedDataHeader *)shared_data;
static VbNvContext nvc;
static LoadKernelParams params;
static VbCommonParams cparams;
VbError_t VbExDiskRead(VbExDiskHandle_t handle, uint64_t lba_start,
uint64_t lba_count, void *buffer)
{
if (handle != (VbExDiskHandle_t)1)
return VBERROR_UNKNOWN;
if (lba_start >= params.streaming_lba_count)
return VBERROR_UNKNOWN;
if (lba_start + lba_count > params.streaming_lba_count)
return VBERROR_UNKNOWN;
memcpy(buffer, diskbuf + lba_start * 512, lba_count * 512);
return VBERROR_SUCCESS;
}
VbError_t VbExDiskWrite(VbExDiskHandle_t handle, uint64_t lba_start,
uint64_t lba_count, const void *buffer)
{
if (handle != (VbExDiskHandle_t)1)
return VBERROR_UNKNOWN;
if (lba_start >= params.streaming_lba_count)
return VBERROR_UNKNOWN;
if (lba_start + lba_count > params.streaming_lba_count)
return VBERROR_UNKNOWN;
memcpy(diskbuf + lba_start * 512, buffer, lba_count * 512);
return VBERROR_SUCCESS;
}
static void print_help(const char *progname)
{
printf("\nUsage: %s <disk_image> <kernel.vbpubk>\n\n",
progname);
}
int main(int argc, char *argv[])
{
VbPublicKey *kernkey;
uint64_t disk_bytes = 0;
int rv;
if (argc < 3) {
print_help(argv[0]);
return 1;
}
/* Load disk file */
/* TODO: is it better to mmap() in the long run? */
diskbuf = ReadFile(argv[1], &disk_bytes);
if (!diskbuf) {
fprintf(stderr, "Can't read disk file %s\n", argv[1]);
return 1;
}
/* Read public key */
kernkey = (VbPublicKey *)vb2_read_packed_key(argv[2]);
if (!kernkey) {
fprintf(stderr, "Can't read key file %s\n", argv[2]);
return 1;
}
/* Set up shared data blob */
VbSharedDataInit(shared, sizeof(shared_data));
VbSharedDataSetKernelKey(shared, kernkey);
/* TODO: optional TPM current kernel version */
/* Set up params */
cparams.shared_data_blob = shared_data;
cparams.shared_data_size = sizeof(shared_data);
params.disk_handle = (VbExDiskHandle_t)1;
params.bytes_per_lba = 512;
params.streaming_lba_count = disk_bytes / 512;
params.gpt_lba_count = params.streaming_lba_count;
params.kernel_buffer_size = 16 * 1024 * 1024;
params.kernel_buffer = malloc(params.kernel_buffer_size);
if (!params.kernel_buffer) {
fprintf(stderr, "Can't allocate kernel buffer\n");
return 1;
}
/* GBB and cparams only needed by LoadKernel() in recovery mode */
params.gbb_data = NULL;
params.gbb_size = 0;
/* TODO(chromium:441893): support dev-mode flag and external gpt flag */
params.boot_flags = 0;
/*
* LoadKernel() cares only about VBNV_DEV_BOOT_SIGNED_ONLY, and only in
* dev mode. So just use defaults.
*/
VbNvSetup(&nvc);
params.nv_context = &nvc;
/* Try loading kernel */
rv = LoadKernel(¶ms, &cparams);
if (rv != VBERROR_SUCCESS) {
fprintf(stderr, "LoadKernel() failed with code %d\n", rv);
return 1;
}
printf("Found a good kernel.\n");
printf("Partition number: %u\n", params.partition_number);
printf("Bootloader address: 0x%" PRIx64 "\n",
params.bootloader_address);
/* TODO: print other things (partition GUID, nv_context, shared_data) */
printf("Yaay!\n");
return 0;
}
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