[mirror_qemu.git] / pc-bios / optionrom / signrom.sh

#!/bin/sh

# Option ROM Signing utility
#
# 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 2 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/>.
#
# Copyright Novell Inc, 2009
#   Authors: Alexander Graf <agraf@suse.de>
#
# Syntax: signrom.sh <input> <output>

# did we get proper arguments?
test "$1" -a "$2" || exit 1

sum=0

# find out the file size
x=`dd if="$1" bs=1 count=1 skip=2 2>/dev/null | od -t u1 -A n`
#size=`expr $x \* 512 - 1`
size=$(( $x * 512 - 1 ))

# now get the checksum
for i in `od -A n -t u1 -v "$1"`; do
    # add each byte's value to sum
    sum=$(( $sum + $i ))
done

sum=$(( $sum % 256 ))
sum=$(( 256 - $sum ))

# and write the output file
cp "$1" "$2"
printf "\\$sum" | dd of="$2" bs=1 count=1 seek=$size conv=notrunc 2>/dev/null
Commit	Line	Data
89e671e3 AG	1	#!/bin/sh
	2
	3	# Option ROM Signing utility
	4	#
	5	# This program is free software; you can redistribute it and/or modify
	6	# it under the terms of the GNU General Public License as published by
	7	# the Free Software Foundation; either version 2 of the License, or
	8	# (at your option) any later version.
	9	#
	10	# This program is distributed in the hope that it will be useful,
	11	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	# GNU General Public License for more details.
	14	#
	15	# You should have received a copy of the GNU General Public License
8167ee88	16	# along with this program; if not, see <http://www.gnu.org/licenses/>.
89e671e3 AG	17	#
	18	# Copyright Novell Inc, 2009
	19	# Authors: Alexander Graf <agraf@suse.de>
	20	#
	21	# Syntax: signrom.sh <input> <output>
	22
	23	# did we get proper arguments?
	24	test "$1" -a "$2" \|\| exit 1
	25
	26	sum=0
	27
	28	# find out the file size
	29	x=`dd if="$1" bs=1 count=1 skip=2 2>/dev/null \| od -t u1 -A n`
	30	#size=`expr $x \* 512 - 1`
	31	size=$(( $x * 512 - 1 ))
	32
	33	# now get the checksum
	34	for i in `od -A n -t u1 -v "$1"`; do
	35	# add each byte's value to sum
	36	sum=$(( $sum + $i ))
	37	done
	38
	39	sum=$(( $sum % 256 ))
	40	sum=$(( 256 - $sum ))
	41
	42	# and write the output file
	43	cp "$1" "$2"
	44	printf "\\$sum" \| dd of="$2" bs=1 count=1 seek=$size conv=notrunc 2>/dev/null