blob: 724dcd8bae103ca94f97c0c2c50501f22b7d25b2 (
plain)
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
|
#! /bin/sh -e
# Copyright (c) 2010 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.
#
# Finds the largest NV space that can be defined on the TPM in this state
# (i.e. without removing existing spaces).
#
# The TPM must be unowned, and physical presence must be on.
low=1
high=1500
try=$high
# Binary search with no upper bound
while true; do
## echo trying $try [ $low $high ]
if /usr/bin/tpmc definespace 0xf004 $(printf "0x%x" $try) 0x1 \
> /dev/null 2>&1; then
# definespace success: end, or $try must grow
if [ $try -eq $low ]; then
echo $low
exit 0
elif [ $try -lt $high ]; then
low=$try
try=$(( ( $high + $low ) / 2 ))
else
# special case: when try == high, expand the search
low=$try
try=$(( $try * 2 ))
high=$try
fi
else
# check for unexpected errors
result=$?
if [ $result -ne 17 ]; then
echo running tpmc definespace 0xf004 0x1 0x1
/usr/bin/tpmc definespace 0xf004 0x1 0x1
echo please correct this condition and try again
exit 1
fi
# definespace failure: end, or $try must shrink
if [ $try -eq $low ]; then
echo 0
exit 0
fi
high=$try
try=$(( ( $high + $low ) / 2 ))
fi
done
|
