mirror of
https://github.com/u-boot/u-boot.git
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e0f2f15534
Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
152 lines
3.3 KiB
Bash
Executable File
152 lines
3.3 KiB
Bash
Executable File
#!/bin/bash
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#
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# Copyright (c) 2013, Google Inc.
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#
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# Simple Verified Boot Test Script
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#
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# SPDX-License-Identifier: GPL-2.0+
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set -e
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# Run U-Boot and report the result
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# Args:
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# $1: Test message
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run_uboot() {
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echo -n "Test Verified Boot Run: $1: "
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${uboot} -d sandbox-u-boot.dtb >${tmp} -c '
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sb load hostfs - 100 test.fit;
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fdt addr 100;
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bootm 100;
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reset'
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if ! grep -q "$2" ${tmp}; then
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echo
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echo "Verified boot key check failed, output follows:"
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cat ${tmp}
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false
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else
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echo "OK"
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fi
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}
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echo "Simple Verified Boot Test"
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echo "========================="
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echo
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echo "Please see doc/uImage.FIT/verified-boot.txt for more information"
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echo
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err=0
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tmp=/tmp/vboot_test.$$
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dir=$(dirname $0)
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if [ -z ${O} ]; then
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O=.
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fi
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O=$(readlink -f ${O})
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dtc="-I dts -O dtb -p 2000"
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uboot="${O}/u-boot"
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mkimage="${O}/tools/mkimage"
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fit_check_sign="${O}/tools/fit_check_sign"
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keys="${dir}/dev-keys"
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echo ${mkimage} -D "${dtc}"
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echo "Build keys"
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mkdir -p ${keys}
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PUBLIC_EXPONENT=${1}
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if [ -z "${PUBLIC_EXPONENT}" ]; then
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PUBLIC_EXPONENT=65537
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fi
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# Create an RSA key pair
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openssl genpkey -algorithm RSA -out ${keys}/dev.key \
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-pkeyopt rsa_keygen_bits:2048 \
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-pkeyopt rsa_keygen_pubexp:${PUBLIC_EXPONENT} 2>/dev/null
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# Create a certificate containing the public key
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openssl req -batch -new -x509 -key ${keys}/dev.key -out ${keys}/dev.crt
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pushd ${dir} >/dev/null
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function do_test {
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echo do $sha test
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# Compile our device tree files for kernel and U-Boot
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dtc -p 0x1000 sandbox-kernel.dts -O dtb -o sandbox-kernel.dtb
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dtc -p 0x1000 sandbox-u-boot.dts -O dtb -o sandbox-u-boot.dtb
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# Create a number kernel image with zeroes
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head -c 5000 /dev/zero >test-kernel.bin
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# Build the FIT, but don't sign anything yet
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echo Build FIT with signed images
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${mkimage} -D "${dtc}" -f sign-images-$sha.its test.fit >${tmp}
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run_uboot "unsigned signatures:" "dev-"
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# Sign images with our dev keys
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echo Sign images
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${mkimage} -D "${dtc}" -F -k dev-keys -K sandbox-u-boot.dtb \
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-r test.fit >${tmp}
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run_uboot "signed images" "dev+"
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# Create a fresh .dtb without the public keys
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dtc -p 0x1000 sandbox-u-boot.dts -O dtb -o sandbox-u-boot.dtb
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echo Build FIT with signed configuration
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${mkimage} -D "${dtc}" -f sign-configs-$sha.its test.fit >${tmp}
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run_uboot "unsigned config" $sha"+ OK"
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# Sign images with our dev keys
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echo Sign images
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${mkimage} -D "${dtc}" -F -k dev-keys -K sandbox-u-boot.dtb \
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-r test.fit >${tmp}
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run_uboot "signed config" "dev+"
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echo check signed config on the host
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if ! ${fit_check_sign} -f test.fit -k sandbox-u-boot.dtb >${tmp}; then
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echo
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echo "Verified boot key check on host failed, output follows:"
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cat ${tmp}
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false
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else
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if ! grep -q "dev+" ${tmp}; then
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echo
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echo "Verified boot key check failed, output follows:"
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cat ${tmp}
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false
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else
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echo "OK"
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fi
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fi
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run_uboot "signed config" "dev+"
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# Increment the first byte of the signature, which should cause failure
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sig=$(fdtget -t bx test.fit /configurations/conf@1/signature@1 value)
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newbyte=$(printf %x $((0x${sig:0:2} + 1)))
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sig="${newbyte} ${sig:2}"
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fdtput -t bx test.fit /configurations/conf@1/signature@1 value ${sig}
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run_uboot "signed config with bad hash" "Bad Data Hash"
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}
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sha=sha1
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do_test
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sha=sha256
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do_test
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popd >/dev/null
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echo
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if ${ok}; then
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echo "Test passed"
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else
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echo "Test failed"
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fi
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