test/vboot/vboot_test.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2013, Google Inc.
   4 #
   5 # Simple Verified Boot Test Script
   6 #
   7 # SPDX-License-Identifier:      GPL-2.0+
   8
   9 set -e
  10
  11 # Run U-Boot and report the result
  12 # Args:
  13 #       $1:     Test message
  14 run_uboot() {
  15         echo -n "Test Verified Boot Run: $1: "
  16         ${uboot} -d sandbox-u-boot.dtb >${tmp} -c '
  17 sb load host 0 100 test.fit;
  18 fdt addr 100;
  19 bootm 100;
  20 reset'
  21         if ! grep -q "$2" ${tmp}; then
  22                 echo
  23                 echo "Verified boot key check failed, output follows:"
  24                 cat ${tmp}
  25                 false
  26         else
  27                 echo "OK"
  28         fi
  29 }
  30
  31 echo "Simple Verified Boot Test"
  32 echo "========================="
  33 echo
  34 echo "Please see doc/uImage.FIT/verified-boot.txt for more information"
  35 echo
  36
  37 err=0
  38 tmp=/tmp/vboot_test.$$
  39
  40 dir=$(dirname $0)
  41
  42 if [ -z ${O} ]; then
  43         O=.
  44 fi
  45 O=$(readlink -f ${O})
  46
  47 dtc="-I dts -O dtb -p 2000"
  48 uboot="${O}/u-boot"
  49 mkimage="${O}/tools/mkimage"
  50 fit_check_sign="${O}/tools/fit_check_sign"
  51 keys="${dir}/dev-keys"
  52 echo ${mkimage} -D "${dtc}"
  53
  54 echo "Build keys"
  55 mkdir -p ${keys}
  56
  57 # Create an RSA key pair
  58 openssl genrsa -F4 -out ${keys}/dev.key 2048 2>/dev/null
  59
  60 # Create a certificate containing the public key
  61 openssl req -batch -new -x509 -key ${keys}/dev.key -out ${keys}/dev.crt
  62
  63 pushd ${dir} >/dev/null
  64
  65 function do_test {
  66         echo do $sha test
  67         # Compile our device tree files for kernel and U-Boot
  68         dtc -p 0x1000 sandbox-kernel.dts -O dtb -o sandbox-kernel.dtb
  69         dtc -p 0x1000 sandbox-u-boot.dts -O dtb -o sandbox-u-boot.dtb
  70
  71         # Create a number kernel image with zeroes
  72         head -c 5000 /dev/zero >test-kernel.bin
  73
  74         # Build the FIT, but don't sign anything yet
  75         echo Build FIT with signed images
  76         ${mkimage} -D "${dtc}" -f sign-images-$sha.its test.fit >${tmp}
  77
  78         run_uboot "unsigned signatures:" "dev-"
  79
  80         # Sign images with our dev keys
  81         echo Sign images
  82         ${mkimage} -D "${dtc}" -F -k dev-keys -K sandbox-u-boot.dtb \
  83                 -r test.fit >${tmp}
  84
  85         run_uboot "signed images" "dev+"
  86
  87
  88         # Create a fresh .dtb without the public keys
  89         dtc -p 0x1000 sandbox-u-boot.dts -O dtb -o sandbox-u-boot.dtb
  90
  91         echo Build FIT with signed configuration
  92         ${mkimage} -D "${dtc}" -f sign-configs-$sha.its test.fit >${tmp}
  93
  94         run_uboot "unsigned config" $sha"+ OK"
  95
  96         # Sign images with our dev keys
  97         echo Sign images
  98         ${mkimage} -D "${dtc}" -F -k dev-keys -K sandbox-u-boot.dtb \
  99                 -r test.fit >${tmp}
 100
 101         run_uboot "signed config" "dev+"
 102
 103         echo check signed config on the host
 104         if ! ${fit_check_sign} -f test.fit -k sandbox-u-boot.dtb >${tmp}; then
 105                 echo
 106                 echo "Verified boot key check on host failed, output follows:"
 107                 cat ${tmp}
 108                 false
 109         else
 110                 if ! grep -q "dev+" ${tmp}; then
 111                         echo
 112                         echo "Verified boot key check failed, output follows:"
 113                         cat ${tmp}
 114                         false
 115                 else
 116                         echo "OK"
 117                 fi
 118         fi
 119
 120         run_uboot "signed config" "dev+"
 121
 122         # Increment the first byte of the signature, which should cause failure
 123         sig=$(fdtget -t bx test.fit /configurations/conf@1/signature@1 value)
 124         newbyte=$(printf %x $((0x${sig:0:2} + 1)))
 125         sig="${newbyte} ${sig:2}"
 126         fdtput -t bx test.fit /configurations/conf@1/signature@1 value ${sig}
 127
 128         run_uboot "signed config with bad hash" "Bad Data Hash"
 129 }
 130
 131 sha=sha1
 132 do_test
 133 sha=sha256
 134 do_test
 135
 136 popd >/dev/null
 137
 138 echo
 139 if ${ok}; then
 140         echo "Test passed"
 141 else
 142         echo "Test failed"
 143 fi