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OpenCellular/tests/futility/test_gbb_utility.sh
Bill Richardson 1eae873b61 futility: Add global args to specify vboot API and format 
The host-side futility tool will need to support all extant vboot
implementations. Some legacy futility commands only support the
original vb1 format, but others ("show" or "sign", for example)
may need to be instructed which formats to expect or emit.

This change adds some global args to specify the preferred
formats. It also cleans up a few [unused AFAICT] one-letter args
to avoid conflicts.

BUG=chromium:231574
BRANCH=none
TEST=make runtests

Nothing makes use of this yet, except the "help" command.

Change-Id: Ib79fa12af72b8860b9494e5d9e90b9572c006107
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/246765
Reviewed-by: Randall Spangler <rspangler@chromium.org>
2015-02-28 00:56:13 +00:00

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#!/bin/bash -eux
# Copyright 2014 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.
me=${0##*/}
TMP="$me.tmp"
# Work in scratch directory
cd "$OUTDIR"
# Helper utility to modify binary blobs
REPLACE="${BUILD_RUN}/tests/futility/binary_editor"
# First, let's test the basic functionality
# For simplicity, we'll use the same size for all properties.
${FUTILITY} gbb_utility -c 16,0x10,16,0x10 ${TMP}.blob
# Flags
${FUTILITY} gbb_utility -s --flags=0xdeadbeef ${TMP}.blob
${FUTILITY} gbb_utility -g --flags ${TMP}.blob | grep -i 0xdeadbeef
# HWID length should include the terminating null - this is too long
if ${FUTILITY} gbb_utility -s --hwid="0123456789ABCDEF" ${TMP}.blob; then
false;
fi
# This works
${FUTILITY} gbb_utility -s --hwid="0123456789ABCDE" ${TMP}.blob
# Read it back?
${FUTILITY} gbb_utility -g ${TMP}.blob | grep "0123456789ABCDE"
# Same kind of tests for the other fields, but they need binary files.
# too long
dd if=/dev/urandom bs=17 count=1 of=${TMP}.data1.toolong
dd if=/dev/urandom bs=17 count=1 of=${TMP}.data2.toolong
dd if=/dev/urandom bs=17 count=1 of=${TMP}.data3.toolong
if ${FUTILITY} gbb_utility -s --rootkey ${TMP}.data1.toolong ${TMP}.blob; then false; fi
if ${FUTILITY} gbb_utility -s --recoverykey ${TMP}.data2.toolong ${TMP}.blob; then false; fi
if ${FUTILITY} gbb_utility -s --bmpfv ${TMP}.data3.toolong ${TMP}.blob; then false; fi
# shorter than max should be okay, though
dd if=/dev/urandom bs=10 count=1 of=${TMP}.data1.short
dd if=/dev/urandom bs=10 count=1 of=${TMP}.data2.short
dd if=/dev/urandom bs=10 count=1 of=${TMP}.data3.short
${FUTILITY} gbb_utility -s \
--rootkey ${TMP}.data1.short \
--recoverykey ${TMP}.data2.short \
--bmpfv ${TMP}.data3.short ${TMP}.blob
# read 'em back
${FUTILITY} gbb_utility -g \
--rootkey ${TMP}.read1 \
--recoverykey ${TMP}.read2 \
--bmpfv ${TMP}.read3 ${TMP}.blob
# Verify (but remember, it's short)
cmp -n 10 ${TMP}.data1.short ${TMP}.read1
cmp -n 10 ${TMP}.data2.short ${TMP}.read2
cmp -n 10 ${TMP}.data3.short ${TMP}.read3
# Okay
dd if=/dev/urandom bs=16 count=1 of=${TMP}.data1
dd if=/dev/urandom bs=16 count=1 of=${TMP}.data2
dd if=/dev/urandom bs=16 count=1 of=${TMP}.data3
${FUTILITY} gbb_utility -s --rootkey ${TMP}.data1 ${TMP}.blob
${FUTILITY} gbb_utility -s --recoverykey ${TMP}.data2 ${TMP}.blob
${FUTILITY} gbb_utility -s --bmpfv ${TMP}.data3 ${TMP}.blob
# Read 'em back.
${FUTILITY} gbb_utility -g --rootkey ${TMP}.read1 ${TMP}.blob
${FUTILITY} gbb_utility -g --recoverykey ${TMP}.read2 ${TMP}.blob
${FUTILITY} gbb_utility -g --bmpfv ${TMP}.read3 ${TMP}.blob
# Verify
cmp ${TMP}.data1 ${TMP}.read1
cmp ${TMP}.data2 ${TMP}.read2
cmp ${TMP}.data3 ${TMP}.read3
# Okay, creating GBB blobs seems to work. Now let's make sure that corrupted
# blobs are rejected.
# Danger Will Robinson! We assume that ${TMP}.blob has this binary struct:
#
# Field Offset Value
#
# signature: 0x0000 $GBB
# major_version: 0x0004 0x0001
# minor_version: 0x0006 0x0001
# header_size: 0x0008 0x00000080
# flags: 0x000c 0xdeadbeef
# hwid_offset: 0x0010 0x00000080
# hwid_size: 0x0014 0x00000010
# rootkey_offset: 0x0018 0x00000090
# rootkey_size: 0x001c 0x00000010
# bmpfv_offset: 0x0020 0x000000a0
# bmpfv_size: 0x0024 0x00000010
# recovery_key_offset: 0x0028 0x000000b0
# recovery_key_size: 0x002c 0x00000010
# pad: 0x0030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
# 0x0040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
# 0x0050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
# 0x0060 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
# 0x0070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
# (HWID) 0x0080 30 31 32 33 34 35 36 37 38 39 41 42 43 44 45 00
# (rootkey) 0x0090 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx
# (bmpfv) 0x00a0 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx
# (recovery_key) 0x00b0 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx
# 0x00c0 <EOF>
#
# bad major_version
cat ${TMP}.blob | ${REPLACE} 0x4 2 > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
# header size too large
cat ${TMP}.blob | ${REPLACE} 0x8 0x81 > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
# header size too small
cat ${TMP}.blob | ${REPLACE} 0x8 0x7f > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
# HWID not null-terminated is invalid
cat ${TMP}.blob | ${REPLACE} 0x8f 0x41 > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
# HWID of length zero is okay
cat ${TMP}.blob | ${REPLACE} 0x14 0x00 > ${TMP}.blob.ok
${FUTILITY} gbb_utility ${TMP}.blob.ok
# And HWID of length 1 consisting only of '\0' is okay, too.
cat ${TMP}.blob | ${REPLACE} 0x14 0x01 | ${REPLACE} 0x80 0x00 > ${TMP}.blob.ok
${FUTILITY} gbb_utility ${TMP}.blob.ok
# zero-length HWID not null-terminated is invalid
cat ${TMP}.blob | ${REPLACE} 0x8f 0x41 > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
# hwid_offset < GBB_HEADER_SIZE is invalid
cat ${TMP}.blob | ${REPLACE} 0x10 0x7f > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
cat ${TMP}.blob | ${REPLACE} 0x10 0x00 > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
# rootkey_offset < GBB_HEADER_SIZE is invalid
cat ${TMP}.blob | ${REPLACE} 0x18 0x7f > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
cat ${TMP}.blob | ${REPLACE} 0x18 0x00 > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
# bmpfv_offset < GBB_HEADER_SIZE is invalid
cat ${TMP}.blob | ${REPLACE} 0x20 0x7f > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
cat ${TMP}.blob | ${REPLACE} 0x20 0x00 > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
# recovery_key_offset < GBB_HEADER_SIZE is invalid
cat ${TMP}.blob | ${REPLACE} 0x28 0x7f > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
cat ${TMP}.blob | ${REPLACE} 0x28 0x00 > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility ${TMP}.blob.bad; then false; fi
# hwid: offset + size == end of file is okay; beyond is invalid
cat ${TMP}.blob | ${REPLACE} 0x14 0x40 > ${TMP}.blob.bad
${FUTILITY} gbb_utility -g ${TMP}.blob.bad
cat ${TMP}.blob | ${REPLACE} 0x14 0x41 > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility -g ${TMP}.blob.bad; then false; fi
# rootkey: offset + size == end of file is okay; beyond is invalid
cat ${TMP}.blob | ${REPLACE} 0x1c 0x30 > ${TMP}.blob.bad
${FUTILITY} gbb_utility -g ${TMP}.blob.bad
cat ${TMP}.blob | ${REPLACE} 0x1c 0x31 > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility -g ${TMP}.blob.bad; then false; fi
# bmpfv: offset + size == end of file is okay; beyond is invalid
cat ${TMP}.blob | ${REPLACE} 0x24 0x20 > ${TMP}.blob.bad
${FUTILITY} gbb_utility -g ${TMP}.blob.bad
cat ${TMP}.blob | ${REPLACE} 0x24 0x21 > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility -g ${TMP}.blob.bad; then false; fi
# recovery_key: offset + size == end of file is okay; beyond is invalid
cat ${TMP}.blob | ${REPLACE} 0x2c 0x10 > ${TMP}.blob.bad
${FUTILITY} gbb_utility -g ${TMP}.blob.bad
cat ${TMP}.blob | ${REPLACE} 0x2c 0x11 > ${TMP}.blob.bad
if ${FUTILITY} gbb_utility -g ${TMP}.blob.bad; then false; fi
# hwid_size == 0 doesn't complain, but can't be set
cat ${TMP}.blob | ${REPLACE} 0x14 0x00 > ${TMP}.blob.bad
${FUTILITY} gbb_utility -g ${TMP}.blob.bad
if ${FUTILITY} gbb_utility -s --hwid="A" ${TMP}.blob.bad; then false; fi
# rootkey_size == 0 gives warning, gets nothing, can't be set
cat ${TMP}.blob | ${REPLACE} 0x1c 0x00 > ${TMP}.blob.bad
${FUTILITY} gbb_utility -g --rootkey ${TMP}.read1 ${TMP}.blob.bad
if ${FUTILITY} gbb_utility -s --rootkey ${TMP}.data1 ${TMP}.blob.bad; then false; fi
# bmpfv_size == 0 gives warning, gets nothing, can't be set
cat ${TMP}.blob | ${REPLACE} 0x24 0x00 > ${TMP}.blob.bad
${FUTILITY} gbb_utility -g --bmpfv ${TMP}.read3 ${TMP}.blob.bad
if ${FUTILITY} gbb_utility -s --bmpfv ${TMP}.data3 ${TMP}.blob.bad; then false; fi
# recovery_key_size == 0 gives warning, gets nothing, can't be set
cat ${TMP}.blob | ${REPLACE} 0x2c 0x00 > ${TMP}.blob.bad
${FUTILITY} gbb_utility -g --recoverykey ${TMP}.read2 ${TMP}.blob.bad
if ${FUTILITY} gbb_utility -s --recoverykey ${TMP}.data2 ${TMP}.blob.bad; then false; fi
# GBB v1.2 adds a sha256 digest field in what was previously padding:
#
# hwid_digest: 0x0030 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx
# 0x0040 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx
# pad: 0x0050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
# 0x0060 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
# 0x0070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
# (HWID) 0x0080 30 31 32 33 34 35 36 37 38 39 41 42 43 44 45 00
# See that the digest is updated properly.
hwid="123456789ABCDEF"
${FUTILITY} gbb_utility -s --hwid=${hwid} ${TMP}.blob
expect=$(echo -n "$hwid" | sha256sum | cut -d ' ' -f 1)
[ $(echo -n ${expect} | wc -c) == "64" ]
${FUTILITY} gbb_utility -g --digest ${TMP}.blob | grep ${expect}
# Garble the digest, see that it's noticed.
# (assuming these zeros aren't present)
cat ${TMP}.blob | ${REPLACE} 0x33 0x00 0x00 0x00 0x00 0x00 > ${TMP}.blob.bad
${FUTILITY} gbb_utility -g --digest ${TMP}.blob.bad | grep '0000000000'
${FUTILITY} gbb_utility -g --digest ${TMP}.blob.bad | grep 'invalid'
# Garble the HWID. The digest is unchanged, but now invalid.
cat ${TMP}.blob | ${REPLACE} 0x84 0x70 0x71 0x72 > ${TMP}.blob.bad
${FUTILITY} gbb_utility -g --digest ${TMP}.blob.bad | grep 'invalid'
# cleanup
rm -f ${TMP}*
exit 0
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