1#!/bin/bash
2# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style license that can be
4# found in the LICENSE file.
5
6# Script to increment kernel subkey for firmware updates.
7# Used when revving versions for a firmware update.
8
9# Load common constants and variables.
10. "$(dirname "$0")/common.sh"
11
12# Abort on errors.
13set -e
14
15if [ $# -ne 1 ]; then
16  cat <<EOF
17  Usage: $0 <keyset directory>
18
19  Increments the kernel subkey in the specified keyset.
20EOF
21  exit 1
22fi
23
24KEY_DIR=$1
25
26main() {
27  load_current_versions "${KEY_DIR}"
28  new_firm_ver=$(increment_version "${KEY_DIR}" "firmware_version")
29
30  cd "${KEY_DIR}"
31  backup_existing_kernel_subkeys ${CURR_FIRM_VER} ${CURR_KERNKEY_VER}
32
33  cat <<EOF
34Generating new kernel subkey and new kernel keyblock.
35
36New Firmware version (due to kernel subkey change): ${new_firm_ver}.
37EOF
38  make_pair kernel_subkey ${KERNEL_SUBKEY_ALGOID} ${new_firm_ver}
39  make_keyblock kernel $KERNEL_KEYBLOCK_MODE kernel_data_key kernel_subkey
40
41  write_updated_version_file ${CURR_FIRMKEY_VER} ${new_firm_ver} \
42    ${CURR_KERNKEY_VER} ${CURR_KERN_VER}
43}
44
45main "$@"
46