blob: afe8f49077036fbd1b073ecdbaa6b28824582925 [file] [log] [blame]
/*
* Copyright (c) 2011 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.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*/
#include <common.h>
#include <cros/common.h>
#include <cros/gbb.h>
#include <gbb_header.h>
static uint32_t gbb_flags;
int gbb_init(void *gbb, firmware_storage_t *file, uint32_t gbb_offset,
size_t gbb_size)
{
GoogleBinaryBlockHeader *gbbh = (GoogleBinaryBlockHeader *)gbb;
uint32_t hwid_end;
uint32_t rootkey_end;
if (file->read(file, gbb_offset, sizeof(*gbbh), gbbh)) {
VBDEBUG("failed to read GBB header\n");
return 1;
}
hwid_end = gbbh->hwid_offset + gbbh->hwid_size;
rootkey_end = gbbh->rootkey_offset + gbbh->rootkey_size;
if (hwid_end < gbbh->hwid_offset || hwid_end > gbb_size ||
rootkey_end < gbbh->rootkey_offset ||
rootkey_end > gbb_size) {
VBDEBUG("%s: invalid gbb header entries\n", __func__);
VBDEBUG(" hwid_end=%x\n", hwid_end);
VBDEBUG(" gbbh->hwid_offset=%x\n", gbbh->hwid_offset);
VBDEBUG(" gbb_size=%zx\n", gbb_size);
VBDEBUG(" rootkey_end=%x\n", rootkey_end);
VBDEBUG(" gbbh->rootkey_offset=%x\n",
gbbh->rootkey_offset);
VBDEBUG(" %d, %d, %d, %d\n",
hwid_end < gbbh->hwid_offset,
hwid_end >= gbb_size,
rootkey_end < gbbh->rootkey_offset,
rootkey_end >= gbb_size);
return 1;
}
if (file->read(file, gbb_offset + gbbh->hwid_offset,
gbbh->hwid_size,
gbb + gbbh->hwid_offset)) {
VBDEBUG("failed to read hwid\n");
return 1;
}
if (file->read(file, gbb_offset + gbbh->rootkey_offset,
gbbh->rootkey_size,
gbb + gbbh->rootkey_offset)) {
VBDEBUG("failed to read root key\n");
return 1;
}
gbb_flags = gbbh->flags;
return 0;
}
int gbb_read_bmp_block(void *gbb, firmware_storage_t *file, uint32_t gbb_offset,
size_t gbb_size)
{
GoogleBinaryBlockHeader *gbbh = (GoogleBinaryBlockHeader *)gbb;
uint32_t bmpfv_end = gbbh->bmpfv_offset + gbbh->bmpfv_size;
if (bmpfv_end < gbbh->bmpfv_offset || bmpfv_end > gbb_size) {
VBDEBUG("%s: invalid gbb header entries\n", __func__);
return 1;
}
if (file->read(file, gbb_offset + gbbh->bmpfv_offset,
gbbh->bmpfv_size,
gbb + gbbh->bmpfv_offset)) {
VBDEBUG("failed to read bmp block\n");
return 1;
}
return 0;
}
int gbb_read_recovery_key(void *gbb, firmware_storage_t *file,
uint32_t gbb_offset, size_t gbb_size)
{
GoogleBinaryBlockHeader *gbbh = (GoogleBinaryBlockHeader *)gbb;
uint32_t rkey_end = gbbh->recovery_key_offset +
gbbh->recovery_key_size;
if (rkey_end < gbbh->recovery_key_offset || rkey_end > gbb_size) {
VBDEBUG("%s: invalid gbb header entries\n", __func__);
VBDEBUG(" gbbh->recovery_key_offset=%x\n",
gbbh->recovery_key_offset);
VBDEBUG(" gbbh->recovery_key_size=%x\n",
gbbh->recovery_key_size);
VBDEBUG(" rkey_end=%x\n", rkey_end);
VBDEBUG(" gbb_size=%zx\n", gbb_size);
return 1;
}
if (file->read(file, gbb_offset + gbbh->recovery_key_offset,
gbbh->recovery_key_size,
gbb + gbbh->recovery_key_offset)) {
VBDEBUG("failed to read recovery key\n");
return 1;
}
return 0;
}
uint32_t gbb_get_flags(void)
{
return gbb_flags;
}
int gbb_check_integrity(uint8_t *gbb)
{
/*
* Avoid a second "$GBB" signature in the binary. Some utility programs
* that parses the contents of firmware image could fail if there are
* multiple signatures.
*/
if (gbb[0] == '$' && gbb[1] == 'G' && gbb[2] == 'B' && gbb[3] == 'B')
return 0;
else
return 1;
}