tests/futility/test_sign_kernel.sh

#!/bin/bash -eux
# Copyright (c) 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"

DEVKEYS=${SRCDIR}/tests/devkeys

echo "hi there" > "${TMP}.config.txt"
echo "hello boys" > "${TMP}.config2.txt"
dd if=/dev/urandom bs=512 count=1 of="${TMP}.bootloader.bin"
dd if=/dev/urandom bs=512 count=1 of="${TMP}.bootloader2.bin"
dd if=/dev/urandom bs=1M count=16 of="${TMP}.kern_partition"

# default padding
padding=49152

try_arch () {
  local arch=$1

  echo -n "${arch}: 1 " 1>&3

  # pack it up the old way
  "${FUTILITY}" --debug vbutil_kernel \
    --pack "${TMP}.blob1.${arch}" \
    --keyblock "${DEVKEYS}/recovery_kernel.keyblock" \
    --signprivate "${DEVKEYS}/recovery_kernel_data_key.vbprivk" \
    --version 1 \
    --config "${TMP}.config.txt" \
    --bootloader "${TMP}.bootloader.bin" \
    --vmlinuz "${SCRIPT_DIR}/futility/data/vmlinuz-${arch}.bin" \
    --arch "${arch}" \
    --pad "${padding}" \
    --kloadaddr 0x11000

  # verify the old way
  "${FUTILITY}" vbutil_kernel --verify "${TMP}.blob1.${arch}" \
    --pad "${padding}" \
    --signpubkey "${DEVKEYS}/recovery_key.vbpubk" > "${TMP}.verify1"

  # pack it up the new way
  "${FUTILITY}" --debug sign \
    --keyset "${DEVKEYS}/recovery_" \
    --version 1 \
    --config "${TMP}.config.txt" \
    --bootloader "${TMP}.bootloader.bin" \
    --vmlinuz "${SCRIPT_DIR}/futility/data/vmlinuz-${arch}.bin" \
    --arch "${arch}" \
    --pad "${padding}" \
    --kloadaddr 0x11000 \
    --outfile "${TMP}.blob2.${arch}"

  "${FUTILITY}" vbutil_kernel --verify "${TMP}.blob2.${arch}" \
    --pad "${padding}" \
    --signpubkey "${DEVKEYS}/recovery_key.vbpubk" > "${TMP}.verify2"

  # they should be identical
  cmp "${TMP}.blob1.${arch}" "${TMP}.blob2.${arch}"
  diff "${TMP}.verify1" "${TMP}.verify2"

  echo -n "2 " 1>&3

  # repack it the old way
  "${FUTILITY}" --debug vbutil_kernel \
    --repack "${TMP}.blob3.${arch}" \
    --oldblob "${TMP}.blob1.${arch}" \
    --signprivate "${DEVKEYS}/kernel_data_key.vbprivk" \
    --keyblock "${DEVKEYS}/kernel.keyblock" \
    --version 2 \
    --pad "${padding}" \
    --config "${TMP}.config2.txt" \
    --bootloader "${TMP}.bootloader2.bin"

  # verify the old way
  "${FUTILITY}" vbutil_kernel --verify "${TMP}.blob3.${arch}" \
    --pad "${padding}" \
    --signpubkey "${DEVKEYS}/kernel_subkey.vbpubk" > "${TMP}.verify3"

  # repack it the new way
  "${FUTILITY}" --debug sign \
    --keyset "${DEVKEYS}" \
    --keyblock "${DEVKEYS}/kernel.keyblock" \
    --version 2 \
    --pad "${padding}" \
    --config "${TMP}.config2.txt" \
    --bootloader "${TMP}.bootloader2.bin" \
    "${TMP}.blob2.${arch}" \
    "${TMP}.blob4.${arch}"

  "${FUTILITY}" vbutil_kernel --verify "${TMP}.blob4.${arch}" \
    --pad "${padding}" \
    --signpubkey "${DEVKEYS}/kernel_subkey.vbpubk" > "${TMP}.verify4"

  # they should be identical
  cmp "${TMP}.blob3.${arch}" "${TMP}.blob4.${arch}"
  diff "${TMP}.verify3" "${TMP}.verify4"

  echo -n "3 " 1>&3

  # repack it the new way, in-place
  cp "${TMP}.blob2.${arch}" "${TMP}.blob5.${arch}"
  "${FUTILITY}" --debug sign \
    --signprivate "${DEVKEYS}/kernel_data_key.vbprivk" \
    --keyblock "${DEVKEYS}/kernel.keyblock" \
    --version 2 \
    --pad "${padding}" \
    --config "${TMP}.config2.txt" \
    --bootloader "${TMP}.bootloader2.bin" \
    "${TMP}.blob5.${arch}"

  "${FUTILITY}" vbutil_kernel --verify "${TMP}.blob5.${arch}" \
    --pad "${padding}" \
    --signpubkey "${DEVKEYS}/kernel_subkey.vbpubk" > "${TMP}.verify5"

  # they should be identical
  cmp "${TMP}.blob3.${arch}" "${TMP}.blob5.${arch}"
  diff "${TMP}.verify3" "${TMP}.verify5"

  # and now just the vblocks...
  echo -n "4 " 1>&3

  # pack the old way
  "${FUTILITY}" vbutil_kernel \
    --pack "${TMP}.blob1.${arch}.vb1" \
    --vblockonly \
    --keyblock "${DEVKEYS}/recovery_kernel.keyblock" \
    --signprivate "${DEVKEYS}/recovery_kernel_data_key.vbprivk" \
    --version 1 \
    --config "${TMP}.config.txt" \
    --bootloader "${TMP}.bootloader.bin" \
    --vmlinuz "${SCRIPT_DIR}/futility/data/vmlinuz-${arch}.bin" \
    --arch "${arch}" \
    --pad "${padding}" \
    --kloadaddr 0x11000

  # compare this new vblock with the one from the full pack
  dd bs="${padding}" count=1 if="${TMP}.blob1.${arch}" \
     of="${TMP}.blob1.${arch}.vb0"
  cmp "${TMP}.blob1.${arch}.vb0" "${TMP}.blob1.${arch}.vb1"

  # pack the new way
  "${FUTILITY}" --debug sign \
    --keyblock "${DEVKEYS}/recovery_kernel.keyblock" \
    --signprivate "${DEVKEYS}/recovery_kernel_data_key.vbprivk" \
    --version 1 \
    --config "${TMP}.config.txt" \
    --bootloader "${TMP}.bootloader.bin" \
    --vmlinuz "${SCRIPT_DIR}/futility/data/vmlinuz-${arch}.bin" \
    --arch "${arch}" \
    --pad "${padding}" \
    --kloadaddr 0x11000 \
    --vblockonly \
    "${TMP}.blob2.${arch}.vb1"

  # compare this new vblock with the one from the full pack
  dd bs="${padding}" count=1 if="${TMP}.blob2.${arch}" \
     of="${TMP}.blob2.${arch}.vb0"
  cmp "${TMP}.blob2.${arch}.vb0" "${TMP}.blob2.${arch}.vb1"

  echo -n "5 " 1>&3

  # now repack the old way, again emitting just the vblock
  "${FUTILITY}" vbutil_kernel \
    --repack "${TMP}.blob3.${arch}.vb1" \
    --vblockonly \
    --oldblob "${TMP}.blob1.${arch}" \
    --signprivate "${DEVKEYS}/kernel_data_key.vbprivk" \
    --keyblock "${DEVKEYS}/kernel.keyblock" \
    --version 2 \
    --pad "${padding}" \
    --config "${TMP}.config2.txt" \
    --bootloader "${TMP}.bootloader2.bin"

  # compare the full repacked vblock with the new repacked vblock
  dd bs="${padding}" count=1 if="${TMP}.blob3.${arch}" \
     of="${TMP}.blob3.${arch}.vb0"
  cmp "${TMP}.blob3.${arch}.vb0" "${TMP}.blob3.${arch}.vb1"

  # extract just the kernel blob
  dd bs="${padding}" skip=1 if="${TMP}.blob3.${arch}" \
     of="${TMP}.blob3.${arch}.kb0"
  # and verify it using the new vblock (no way to do that with vbutil_kernel)
  "${FUTILITY}" --debug verify \
    --pad "${padding}" \
    --publickey "${DEVKEYS}/kernel_subkey.vbpubk" \
    --fv "${TMP}.blob3.${arch}.kb0" \
    "${TMP}.blob3.${arch}.vb1" > "${TMP}.verify3v"

  # repack the new way
  "${FUTILITY}" --debug sign \
    --signprivate "${DEVKEYS}/kernel_data_key.vbprivk" \
    --keyblock "${DEVKEYS}/kernel.keyblock" \
    --version 2 \
    --config "${TMP}.config2.txt" \
    --bootloader "${TMP}.bootloader2.bin" \
    --pad "${padding}" \
    --vblockonly \
    "${TMP}.blob2.${arch}" \
    "${TMP}.blob4.${arch}.vb1" \

  # compare the full repacked vblock with the new repacked vblock
  dd bs="${padding}" count=1 if="${TMP}.blob4.${arch}" \
     of="${TMP}.blob4.${arch}.vb0"
  cmp "${TMP}.blob4.${arch}.vb0" "${TMP}.blob4.${arch}.vb1"

  # extract just the kernel blob
  dd bs="${padding}" skip=1 if="${TMP}.blob4.${arch}" \
     of="${TMP}.blob4.${arch}.kb0"
  # and verify it using the new vblock (no way to do that with vbutil_kernel)
  "${FUTILITY}" --debug verify \
    --pad "${padding}" \
    --publickey "${DEVKEYS}/kernel_subkey.vbpubk" \
    --fv "${TMP}.blob4.${arch}.kb0" \
    "${TMP}.blob4.${arch}.vb1" > "${TMP}.verify4v"


  echo -n "6 " 1>&3

  # Now lets repack some kernel partitions, not just blobs.
  cp "${TMP}.kern_partition" "${TMP}.part1.${arch}"
  dd if="${TMP}.blob1.${arch}" of="${TMP}.part1.${arch}" conv=notrunc

  # Make sure the partitions verify
  "${FUTILITY}" vbutil_kernel --verify "${TMP}.part1.${arch}" \
    --pad "${padding}" \
    --signpubkey "${DEVKEYS}/recovery_key.vbpubk" > "${TMP}.verify6"

  # The partition should verify the same way as the blob
  diff "${TMP}.verify1" "${TMP}.verify6"

  # repack it the old way
  "${FUTILITY}" --debug vbutil_kernel \
    --repack "${TMP}.part6.${arch}" \
    --oldblob "${TMP}.part1.${arch}" \
    --signprivate "${DEVKEYS}/kernel_data_key.vbprivk" \
    --keyblock "${DEVKEYS}/kernel.keyblock" \
    --version 2 \
    --pad "${padding}" \
    --config "${TMP}.config2.txt" \
    --bootloader "${TMP}.bootloader2.bin"

  # verify the old way
  "${FUTILITY}" vbutil_kernel --verify "${TMP}.part6.${arch}" \
    --pad "${padding}" \
    --signpubkey "${DEVKEYS}/kernel_subkey.vbpubk" > "${TMP}.verify6.old"

  # this "partition" should actually be the same as the old-way blob
  cmp "${TMP}.blob3.${arch}" "${TMP}.part6.${arch}"

  # repack it the new way, in-place
  cp "${TMP}.part1.${arch}" "${TMP}.part6.${arch}.new1"
  "${FUTILITY}" --debug sign \
    --signprivate "${DEVKEYS}/kernel_data_key.vbprivk" \
    --keyblock "${DEVKEYS}/kernel.keyblock" \
    --version 2 \
    --pad "${padding}" \
    --config "${TMP}.config2.txt" \
    --bootloader "${TMP}.bootloader2.bin" \
    "${TMP}.part6.${arch}.new1"

  "${FUTILITY}" vbutil_kernel --verify "${TMP}.part6.${arch}.new1" \
    --pad "${padding}" \
    --signpubkey "${DEVKEYS}/kernel_subkey.vbpubk" > "${TMP}.verify6.new1"

  # The verification should be indentical
  diff "${TMP}.verify6.old" "${TMP}.verify6.new1"
  # But the content should only match up to the size of the kernel blob, since
  # we're modifying an entire partition in-place.
  blobsize=$(stat -c '%s' "${TMP}.part6.${arch}")
  cmp -n "${blobsize}" "${TMP}.part6.${arch}" "${TMP}.part6.${arch}.new1"
  # The rest of the partition should be unchanged.
  cmp -i "${blobsize}" "${TMP}.part1.${arch}" "${TMP}.part6.${arch}.new1"

  # repack it the new way, from input to output
  cp "${TMP}.part1.${arch}" "${TMP}.part1.${arch}.in"
  "${FUTILITY}" --debug sign \
    --signprivate "${DEVKEYS}/kernel_data_key.vbprivk" \
    --keyblock "${DEVKEYS}/kernel.keyblock" \
    --version 2 \
    --pad "${padding}" \
    --config "${TMP}.config2.txt" \
    --bootloader "${TMP}.bootloader2.bin" \
    "${TMP}.part1.${arch}.in" \
    "${TMP}.part6.${arch}.new2"

  "${FUTILITY}" vbutil_kernel --verify "${TMP}.part6.${arch}.new2" \
    --pad "${padding}" \
    --signpubkey "${DEVKEYS}/kernel_subkey.vbpubk" > "${TMP}.verify6.new2"

  # The input file should not have changed (just being sure).
  cmp "${TMP}.part1.${arch}" "${TMP}.part1.${arch}.in"
  # The verification should be indentical
  diff "${TMP}.verify6.old" "${TMP}.verify6.new2"
  # And creating a new output file should only emit a blob's worth
  cmp "${TMP}.part6.${arch}" "${TMP}.part6.${arch}.new2"

  # Note: We specifically do not test repacking with a different --kloadaddr,
  # because the old way has a bug and does not update params->cmd_line_ptr to
  # point at the new on-disk location. Apparently (and not surprisingly), no
  # one has ever done that.
}

try_arch amd64
try_arch arm

# cleanup
rm -rf "${TMP}"*
exit 0