1#!/bin/bash
2# Copyright (c) 2011 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 and datakey for firmware updates.
7# Used when revving versions for a firmware update.
8
9# Load common constants and variables.
10. "${0%/*}"/common.sh
11
12# Abort on errors.
13set -e
14
15if [ $# -ne 1 ]; then
16  cat <<EOF
17Usage: $0 <keyset directory>
18
19Increments the kernel subkey, data key and firmware version in the
20specified keyset.
21EOF
22  exit 1
23fi
24
25KEY_DIR=$1
26
27main() {
28  load_current_versions "${KEY_DIR}"
29  new_kernkey_ver=$(increment_version "${KEY_DIR}" "kernel_key_version")
30  new_firm_ver=$(increment_version "${KEY_DIR}" "firmware_version")
31
32  cd "${KEY_DIR}"
33  backup_existing_kernel_subkeys ${CURR_FIRM_VER} ${CURR_KERNKEY_VER}
34  backup_existing_kernel_data_keys ${CURR_FIRM_VER} ${CURR_KERNKEY_VER}
35
36  cat <<EOF 
37Generating new kernel subkey, data keys and new kernel keyblock.
38
39New Firmware version (due to kernel subkey change): ${new_firm_ver}.
40New Kernel key version (due to kernel datakey change): ${new_kernkey_ver}.
41EOF
42  make_pair kernel_subkey ${KERNEL_SUBKEY_ALGOID} ${new_firm_ver}
43  make_pair kernel_data_key ${KERNEL_DATAKEY_ALGOID} ${new_kernkey_ver}
44  make_keyblock kernel ${KERNEL_KEYBLOCK_MODE} kernel_data_key kernel_subkey
45
46  write_updated_version_file ${CURR_FIRMKEY_VER} ${new_firm_ver} \
47    ${new_kernkey_ver} ${CURR_KERN_VER}
48}
49
50main "$@"
51