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#!/bin/bash
#
# Copyright (c) 2013, Google Inc.
#
# Simple Verified Boot Test Script
#
# SPDX-License-Identifier: GPL-2.0+
set -e
# Run U-Boot and report the result
# Args:
# $1: Test message
run_uboot() {
echo -n "Test Verified Boot Run: $1: "
${uboot} -d sandbox-u-boot.dtb >${tmp} -c '
sb load hostfs - 100 test.fit;
fdt addr 100;
bootm 100;
reset'
if ! grep -q "$2" ${tmp}; then
echo
echo "Verified boot key check failed, output follows:"
cat ${tmp}
false
else
echo "OK"
fi
}
echo "Simple Verified Boot Test"
echo "========================="
echo
echo "Please see doc/uImage.FIT/verified-boot.txt for more information"
echo
err=0
tmp=/tmp/vboot_test.$$
dir=$(dirname $0)
if [ -z ${O} ]; then
O=.
fi
O=$(readlink -f ${O})
dtc="-I dts -O dtb -p 2000"
uboot="${O}/u-boot"
mkimage="${O}/tools/mkimage"
fit_check_sign="${O}/tools/fit_check_sign"
keys="${dir}/dev-keys"
echo ${mkimage} -D "${dtc}"
echo "Build keys"
mkdir -p ${keys}
PUBLIC_EXPONENT=${1}
if [ -z "${PUBLIC_EXPONENT}" ]; then
PUBLIC_EXPONENT=65537
fi
# Create an RSA key pair
openssl genpkey -algorithm RSA -out ${keys}/dev.key \
-pkeyopt rsa_keygen_bits:2048 \
-pkeyopt rsa_keygen_pubexp:${PUBLIC_EXPONENT} 2>/dev/null
# Create a certificate containing the public key
openssl req -batch -new -x509 -key ${keys}/dev.key -out ${keys}/dev.crt
pushd ${dir} >/dev/null
function do_test {
echo do $sha test
# Compile our device tree files for kernel and U-Boot
dtc -p 0x1000 sandbox-kernel.dts -O dtb -o sandbox-kernel.dtb
dtc -p 0x1000 sandbox-u-boot.dts -O dtb -o sandbox-u-boot.dtb
# Create a number kernel image with zeroes
head -c 5000 /dev/zero >test-kernel.bin
# Build the FIT, but don't sign anything yet
echo Build FIT with signed images
${mkimage} -D "${dtc}" -f sign-images-$sha.its test.fit >${tmp}
run_uboot "unsigned signatures:" "dev-"
# Sign images with our dev keys
echo Sign images
${mkimage} -D "${dtc}" -F -k dev-keys -K sandbox-u-boot.dtb \
-r test.fit >${tmp}
run_uboot "signed images" "dev+"
# Create a fresh .dtb without the public keys
dtc -p 0x1000 sandbox-u-boot.dts -O dtb -o sandbox-u-boot.dtb
echo Build FIT with signed configuration
${mkimage} -D "${dtc}" -f sign-configs-$sha.its test.fit >${tmp}
run_uboot "unsigned config" $sha"+ OK"
# Sign images with our dev keys
echo Sign images
${mkimage} -D "${dtc}" -F -k dev-keys -K sandbox-u-boot.dtb \
-r test.fit >${tmp}
run_uboot "signed config" "dev+"
echo check signed config on the host
if ! ${fit_check_sign} -f test.fit -k sandbox-u-boot.dtb >${tmp}; then
echo
echo "Verified boot key check on host failed, output follows:"
cat ${tmp}
false
else
if ! grep -q "dev+" ${tmp}; then
echo
echo "Verified boot key check failed, output follows:"
cat ${tmp}
false
else
echo "OK"
fi
fi
run_uboot "signed config" "dev+"
# Increment the first byte of the signature, which should cause failure
sig=$(fdtget -t bx test.fit /configurations/conf@1/signature@1 value)
newbyte=$(printf %x $((0x${sig:0:2} + 1)))
sig="${newbyte} ${sig:2}"
fdtput -t bx test.fit /configurations/conf@1/signature@1 value ${sig}
run_uboot "signed config with bad hash" "Bad Data Hash"
}
sha=sha1
do_test
sha=sha256
do_test
popd >/dev/null
echo
if ${ok}; then
echo "Test passed"
else
echo "Test failed"
fi
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