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mod_image_for_recovery: add flag to decrypt stateful

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When building the recovery image, add a flag file for triggering the
decryption of the stateful partition.

BUG=chromium-os:34199
TEST=parrot recovery

Change-Id: I43c6a8469d7fad1b9d5b85aae9aaf525b1588ed5
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/32597
Reviewed-by: Will Drewry <wad@chromium.org>
Commit-Ready: Will Drewry <wad@chromium.org>
This commit is contained in:
Kees Cook 2012-09-07 13:15:55 -07:00 committed by Gerrit
parent 5b2c7e934c
commit 0f2cfe6b9d
1 changed files with 18 additions and 0 deletions
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18
mod_image_for_recovery.sh
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@ -45,6 +45,8 @@ DEFINE_string keys_dir "/usr/share/vboot/devkeys" \
"directory containing the signing keys"
DEFINE_boolean verbose $FLAGS_FALSE \
"log all commands to stdout" v
DEFINE_boolean decrypt_stateful $FLAGS_FALSE \
"request a decryption of the stateful partition (implies --nominimize_image)"
# Parse command line
FLAGS "$@" || exit 1
@ -59,6 +61,12 @@ if [ $FLAGS_verbose -eq $FLAGS_TRUE ]; then
set -x
fi
# We need space for copying decrypted files to the recovery image, so force
# --nominimize_image when using --decrypt_stateful.
if [ $FLAGS_decrypt_stateful -eq $FLAGS_TRUE ]; then
FLAGS_minimize_image=$FLAGS_FALSE
fi
# Load board options.
. "${BUILD_LIBRARY_DIR}/board_options.sh" || exit 1
EMERGE_BOARD_CMD="emerge-$BOARD"
@ -422,6 +430,16 @@ trap cleanup EXIT
maybe_resize_stateful # Also copies the image if needed.
if [ $FLAGS_decrypt_stateful -eq $FLAGS_TRUE ]; then
stateful_mnt=$(mktemp -d)
offset=$(partoffset "${RECOVERY_IMAGE}" 1)
sudo mount -o loop,offset=$(( offset * 512 )) \
"${RECOVERY_IMAGE}" "${stateful_mnt}"
echo -n "1" | sudo tee "${stateful_mnt}"/decrypt_stateful >/dev/null
sudo umount "$stateful_mnt"
rmdir "$stateful_mnt"
fi
install_recovery_kernel
okboat