blob: 416b760437850cacd17f887bdd41d67c8e334bbe (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
#!/bin/bash
# Copyright (C) 2016 Paul Kocialkowski <contact@paulk.fr>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
REGEXP="\([^[:space:]]*\)[[:space:]]\(.*\)"
KEYBLOCK="keyblock"
VBPRIVK="vbprivk"
VBPUBK="vbpubk"
KEYB="keyb"
PEM="pem"
CRT="crt"
KEYS="ec_root_key ec_data_key root_key firmware_data_key kernel_subkey kernel_data_key recovery_key recovery_kernel_data_key installer_kernel_data_key"
KEYBLOCKS="firmware ec recovery_kernel kernel installer_kernel"
SUBKEYS="firmware_data_key root_key ec_data_key ec_root_key recovery_kernel_data_key recovery_key kernel_data_key kernel_subkey installer_kernel_data_key recovery_key"
ALGORITHMS="7 7 11 7 7 4 11 11 11"
MODES="7 7 11 7 10"
usage() {
printf "$executable [action]\n" >&2
printf "\nActions:\n" >&2
printf " generate - Generate a set of keys\n" >&2
printf " verify - Verify keyblocks\n" >&2
printf "\nEnvironment variables:\n" >&2
printf " KEYS_VERSION - Version to give the keys\n" >&2
printf " VBOOT_KEYS_PATH - Path to the vboot keys\n" >&2
printf " VBOOT_TOOLS_PATH - Path to vboot tools\n" >&2
}
keys_override_confirm() {
local override=0
local confirm
for key in $KEYS
do
if [ -f "$VBOOT_KEYS_PATH/$key.$VBPUBK" ] || [ -f "$VBOOT_KEYS_PATH/$key.$VBPRIVK" ]
then
override=1
fi
done
for keyblock in $KEYBLOCKS
do
if [ -f "$VBOOT_KEYS_PATH/$keyblock.$KEYBLOCK" ]
then
override=1
fi
done
if [ $override -ne 1 ]
then
return 0
fi
printf "This is going to override keys stored in the following directory:\n"
printf " $VBOOT_KEYS_PATH\n"
printf "Press enter to confirm: "
read confirm
}
generate() {
local algorithms=$ALGORITHMS
local subkeys=$SUBKEYS
local modes=$MODES
local keyblock
local algorithm
local pubkey
local privkey
local mode
keys_override_confirm
for key in $KEYS
do
algorithm=$( echo "$algorithms" | sed "s/$REGEXP/\1/g" )
algorithms=$( echo "$algorithms" | sed "s/$REGEXP/\2/g" )
key_length=$(( 1 << (10 + ($algorithm / 3)) ))
openssl genrsa -F4 -out "$VBOOT_KEYS_PATH/$key.$PEM" "$key_length"
openssl req -batch -new -x509 -key "$VBOOT_KEYS_PATH/$key.$PEM"
openssl req -batch -new -x509 -key "$VBOOT_KEYS_PATH/$key.$PEM" -out "$VBOOT_KEYS_PATH/$key.$CRT"
dumpRSAPublicKey -cert "$VBOOT_KEYS_PATH/$key.$CRT" > "$VBOOT_KEYS_PATH/$key.$KEYB"
futility vbutil_key --pack "$VBOOT_KEYS_PATH/$key.$VBPUBK" --key "$VBOOT_KEYS_PATH/$key.$KEYB" --version "$KEYS_VERSION" --algorithm "$algorithm"
futility vbutil_key --pack "$VBOOT_KEYS_PATH/$key.$VBPRIVK" --key "$VBOOT_KEYS_PATH/$key.$PEM" --algorithm "$algorithm"
rm -f "$VBOOT_KEYS_PATH/$key.$PEM" "$VBOOT_KEYS_PATH/$key.$CRT" "$VBOOT_KEYS_PATH/$key.$KEYB"
done
printf "\nGenerated keys $KEYS\n"
for keyblock in $KEYBLOCKS
do
pubkey=$( echo "$subkeys" | sed "s/$REGEXP/\1/g" )
subkeys=$( echo "$subkeys" | sed "s/$REGEXP/\2/g" )
privkey=$( echo "$subkeys" | sed "s/$REGEXP/\1/g" )
subkeys=$( echo "$subkeys" | sed "s/$REGEXP/\2/g" )
mode=$( echo "$modes" | sed "s/$REGEXP/\1/g" )
modes=$( echo "$modes" | sed "s/$REGEXP/\2/g" )
futility vbutil_keyblock --pack "$VBOOT_KEYS_PATH/$keyblock.$KEYBLOCK" --flags "$mode" --datapubkey "$VBOOT_KEYS_PATH/$pubkey.$VBPUBK" --signprivate "$VBOOT_KEYS_PATH/$privkey.$VBPRIVK"
futility vbutil_keyblock --unpack "$VBOOT_KEYS_PATH/$keyblock.$KEYBLOCK" --signpubkey "$VBOOT_KEYS_PATH/$privkey.$VBPUBK"
done
printf "\nGenerated keyblocks $KEYBLOCKS\n"
}
verify() {
local subkeys=$SUBKEYS
local pubkey
local privkey
for keyblock in $KEYBLOCKS
do
pubkey=$( echo "$subkeys" | sed "s/$REGEXP/\1/g" )
subkeys=$( echo "$subkeys" | sed "s/$REGEXP/\2/g" )
privkey=$( echo "$subkeys" | sed "s/$REGEXP/\1/g" )
subkeys=$( echo "$subkeys" | sed "s/$REGEXP/\2/g" )
futility vbutil_keyblock --unpack "$VBOOT_KEYS_PATH/$keyblock.$KEYBLOCK" --signpubkey "$VBOOT_KEYS_PATH/$privkey.$VBPUBK"
done
printf "\nVerified keyblocks $KEYBLOCKS\n"
}
requirements() {
local requirement
local requirement_path
for requirement in "$@"
do
requirement_path=$( which "$requirement" || true )
if [ -z "$requirement_path" ]
then
printf "Missing requirement: $requirement\n" >&2
exit 1
fi
done
}
setup() {
root=$(readlink -f "$( dirname "$0" )" )
executable=$( basename "$0" )
if [ -z "$KEYS_VERSION" ]
then
KEYS_VERSION=1
fi
if ! [ -z "$VBOOT_TOOLS_PATH" ]
then
PATH="$PATH:$VBOOT_TOOLS_PATH"
fi
if [ -z "$VBOOT_KEYS_PATH" ]
then
VBOOT_KEYS_PATH="$root/keys"
mkdir -p "$VBOOT_KEYS_PATH"
fi
}
cros_boot_keys() {
local action=$1
set -e
setup "$@"
if [ -z "$action" ]
then
usage
exit 1
fi
case $action in
"generate")
requirements "openssl" "dumpRSAPublicKey" "futility"
generate
;;
"verify")
requirements "futility"
verify
;;
*)
usage
exit 1
;;
esac
}
cros_boot_keys "$@"
|
