Merge "Add support for Brillo Verified Boot." (003bec43) · Commits · e / os / android_build

core/Makefile

+53 −0

Original line number	Diff line number	Diff line
		@@ -507,8 +507,28 @@ INTERNAL_BOOTIMAGE_ARGS := \
		$(addprefix --second ,$(INSTALLED_2NDBOOTLOADER_TARGET)) \
		--kernel $(INSTALLED_KERNEL_TARGET)

		INTERNAL_BVBTOOL_MAKE_BOOT_IMAGE_ARGS := \
		--kernel $(INSTALLED_KERNEL_TARGET) \
		--rootfs_with_hashes $(PRODUCT_OUT)/system.img

		ifdef BOARD_BVB_ROLLBACK_INDEX
		INTERNAL_BVBTOOL_MAKE_BOOT_IMAGE_ARGS += \
		--rollback_index $(BOARD_BVB_ROLLBACK_INDEX)
		endif

		ifndef BOARD_BVB_KEY_PATH
		# If key path isn't specified, use the 4096-bit test key.
		INTERNAL_BVBTOOL_SIGN_BOOT_IMAGE_ARGS := --algorithm SHA256_RSA4096 \
		--key system/bvb/test/testkey_rsa4096.pem
		else
		INTERNAL_BVBTOOL_SIGN_BOOT_IMAGE_ARGS := \
		--algorithm $(BOARD_BVB_ALGORITHM) --key $(BOARD_BVB_KEY_PATH)
		endif


		ifneq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE),true)
		INTERNAL_BOOTIMAGE_ARGS += --ramdisk $(INSTALLED_RAMDISK_TARGET)
		INTERNAL_BVBTOOL_MAKE_BOOT_IMAGE_ARGS += --initrd $(INSTALLED_RAMDISK_TARGET)
		endif


		@@ -517,6 +537,7 @@ INTERNAL_BOOTIMAGE_FILES := $(filter-out --%,$(INTERNAL_BOOTIMAGE_ARGS))
		BOARD_KERNEL_CMDLINE := $(strip $(BOARD_KERNEL_CMDLINE))
		ifdef BOARD_KERNEL_CMDLINE
		INTERNAL_BOOTIMAGE_ARGS += --cmdline "$(BOARD_KERNEL_CMDLINE)"
		INTERNAL_BVBTOOL_MAKE_BOOT_IMAGE_ARGS += --kernel_cmdline "$(BOARD_KERNEL_CMDLINE)"
		endif

		BOARD_KERNEL_BASE := $(strip $(BOARD_KERNEL_BASE))
		@@ -542,6 +563,23 @@ ifneq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE),true)
		endif
		endif

		ifeq ($(BOARD_BVB_ENABLE),true)

		$(INSTALLED_BOOTIMAGE_TARGET): $(BVBTOOL) $(INTERNAL_BOOTIMAGE_FILES) $(PRODUCT_OUT)/system.img
		$(call pretty,"Target boot image: $@")
		$(hide) $(BVBTOOL) make_boot_image $(INTERNAL_BVBTOOL_MAKE_BOOT_IMAGE_ARGS) $(BOARD_BVB_MAKE_BOOT_IMAGE_ARGS) --output $@
		$(hide) $(BVBTOOL) sign_boot_image $(INTERNAL_BVBTOOL_SIGN_BOOT_IMAGE_ARGS) $(BOARD_BVB_SIGN_BOOT_IMAGE_ARGS) --image $@
		$(hide) $(call assert-max-image-size,$@,$(BOARD_BOOTIMAGE_PARTITION_SIZE))

		.PHONY: bootimage-nodeps
		bootimage-nodeps: $(BVBTOOL)
		@echo "make $@: ignoring dependencies"
		$(hide) $(BVBTOOL) make_boot_image $(INTERNAL_BVBTOOL_MAKE_BOOT_IMAGE_ARGS) $(BOARD_BVB_MAKE_BOOT_IMAGE_ARGS) --output $(INSTALLED_BOOTIMAGE_TARGET)
		$(hide) $(BVBTOOL) sign_boot_image $(INTERNAL_BVBTOOL_SIGN_BOOT_IMAGE_ARGS) $(BOARD_BVB_SIGN_BOOT_IMAGE_ARGS) --image $(INSTALLED_BOOTIMAGE_TARGET)
		$(hide) $(call assert-max-image-size,$(INSTALLED_BOOTIMAGE_TARGET),$(BOARD_BOOTIMAGE_PARTITION_SIZE))

		else # BOARD_BVB_ENABLE

		# We build recovery as boot image if BOARD_USES_RECOVERY_AS_BOOT is true.
		ifneq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
		ifeq ($(TARGET_BOOTIMAGE_USE_EXT2),true)
		@@ -591,6 +629,7 @@ bootimage-nodeps: $(MKBOOTIMG)

		endif # TARGET_BOOTIMAGE_USE_EXT2
		endif # BOARD_USES_RECOVERY_AS_BOOT
		endif # BOARD_BVB_ENABLE

		else # TARGET_NO_KERNEL
		# HACK: The top-level targets depend on the bootimage. Not all targets
		@@ -1117,8 +1156,13 @@ define build-systemimage-target
		fi; \
		mkdir -p $(DIST_DIR); cp $(INSTALLED_FILES_FILE) $(DIST_DIR)/installed-files-rescued.txt; \
		exit 1 )
		$(if $(BOARD_BVB_ENABLE), $(hide) $(BVBTOOL) add_image_hashes $(BOARD_BVB_ADD_IMAGE_HASHES_ARGS) --image $(1))
		endef

		ifeq ($(BOARD_BVB_ENABLE),true)
		FULL_SYSTEMIMAGE_DEPS += $(BVBTOOL)
		endif

		$(BUILT_SYSTEMIMAGE): $(FULL_SYSTEMIMAGE_DEPS) $(INSTALLED_FILES_FILE)
		$(call build-systemimage-target,$@)

		@@ -1721,6 +1765,15 @@ ifneq ($(strip $(SANITIZE_TARGET)),)
		endif
		ifeq ($(BOARD_USES_FULL_RECOVERY_IMAGE),true)
		$(hide) echo "full_recovery_image=true" >> $(zip_root)/META/misc_info.txt
		endif
		ifeq ($(BOARD_BVB_ENABLE),true)
		$(hide) echo "board_bvb_enable=true" >> $(zip_root)/META/misc_info.txt
		$(hide) echo "board_bvb_make_boot_image_args=$(BOARD_BVB_MAKE_BOOT_IMAGE_ARGS)" >> $(zip_root)/META/misc_info.txt
		$(hide) echo "board_bvb_sign_boot_image_args=$(BOARD_BVB_SIGN_BOOT_IMAGE_ARGS)" >> $(zip_root)/META/misc_info.txt
		$(hide) echo "board_bvb_algorithm=$(BOARD_BVB_ALGORITHM)" >> $(zip_root)/META/misc_info.txt
		$(hide) echo "board_bvb_key_path=$(BOARD_BVB_KEY_PATH)" >> $(zip_root)/META/misc_info.txt
		$(hide) echo "board_bvb_rollback_index=$(BOARD_BVB_ROLLBACK_INDEX)" >> $(zip_root)/META/misc_info.txt
		$(hide) echo "board_bvb_add_image_hashes_args=$(BOARD_BVB_ADD_IMAGE_HASHES_ARGS)" >> $(zip_root)/META/misc_info.txt
		endif
		$(call generate-userimage-prop-dictionary, $(zip_root)/META/misc_info.txt)
		ifneq ($(INSTALLED_RECOVERYIMAGE_TARGET),)

core/config.mk

+5 −0

Original line number	Diff line number	Diff line
		@@ -518,6 +518,11 @@ MKBOOTIMG := $(HOST_OUT_EXECUTABLES)/mkbootimg$(HOST_EXECUTABLE_SUFFIX)
		else
		MKBOOTIMG := $(BOARD_CUSTOM_MKBOOTIMG)
		endif
		ifeq (,$(strip $(BOARD_CUSTOM_BVBTOOL)))
		BVBTOOL := $(HOST_OUT_EXECUTABLES)/bvbtool$(HOST_EXECUTABLE_SUFFIX)
		else
		BVBTOOL := $(BOARD_CUSTOM_BVBTOOL)
		endif
		APICHECK := $(HOST_OUT_EXECUTABLES)/apicheck$(HOST_EXECUTABLE_SUFFIX)
		FS_GET_STATS := $(HOST_OUT_EXECUTABLES)/fs_get_stats$(HOST_EXECUTABLE_SUFFIX)
		MAKE_EXT4FS := $(HOST_OUT_EXECUTABLES)/make_ext4fs$(HOST_EXECUTABLE_SUFFIX)

tools/releasetools/add_img_to_target_files.py

+51 −7

Original line number	Diff line number	Diff line
		@@ -31,7 +31,9 @@ if sys.hexversion < 0x02070000:
		import datetime
		import errno
		import os
		import shlex
		import shutil
		import subprocess
		import tempfile
		import zipfile

		@@ -48,12 +50,12 @@ OPTIONS.verity_signer_path = None

		def AddSystem(output_zip, prefix="IMAGES/", recovery_img=None, boot_img=None):
		"""Turn the contents of SYSTEM into a system image and store it in
		output_zip."""
		output_zip. Returns the name of the system image file."""

		prebuilt_path = os.path.join(OPTIONS.input_tmp, prefix, "system.img")
		if os.path.exists(prebuilt_path):
		print "system.img already exists in %s, no need to rebuild..." % (prefix,)
		return
		return prebuilt_path

		def output_sink(fn, data):
		ofile = open(os.path.join(OPTIONS.input_tmp, "SYSTEM", fn), "w")
		@@ -68,8 +70,23 @@ def AddSystem(output_zip, prefix="IMAGES/", recovery_img=None, boot_img=None):
		block_list = common.MakeTempFile(prefix="system-blocklist-", suffix=".map")
		imgname = BuildSystem(OPTIONS.input_tmp, OPTIONS.info_dict,
		block_list=block_list)

		# If requested, calculate and add dm-verity integrity hashes and
		# metadata to system.img.
		if OPTIONS.info_dict.get("board_bvb_enable", None) == "true":
		bvbtool = os.getenv('BVBTOOL') or "bvbtool"
		cmd = [bvbtool, "add_image_hashes", "--image", imgname]
		args = OPTIONS.info_dict.get("board_bvb_add_image_hashes_args", None)
		if args and args.strip():
		cmd.extend(shlex.split(args))
		p = common.Run(cmd, stdout=subprocess.PIPE)
		p.communicate()
		assert p.returncode == 0, "bvbtool add_image_hashes of %s image failed" % (
		os.path.basename(OPTIONS.input_tmp),)

		common.ZipWrite(output_zip, imgname, prefix + "system.img")
		common.ZipWrite(output_zip, block_list, prefix + "system.map")
		return imgname


		def BuildSystem(input_dir, info_dict, block_list=None):
		@@ -275,19 +292,36 @@ def AddImagesToTargetFiles(filename):
		compression=zipfile.ZIP_DEFLATED)

		has_recovery = (OPTIONS.info_dict.get("no_recovery") != "true")
		system_root_image = (OPTIONS.info_dict.get("system_root_image", None) == "true")
		board_bvb_enable = (OPTIONS.info_dict.get("board_bvb_enable", None) == "true")

		# Brillo Verified Boot is incompatible with certain
		# configurations. Explicitly check for these.
		if board_bvb_enable:
		assert not has_recovery, "has_recovery incompatible with bvb"
		assert not system_root_image, "system_root_image incompatible with bvb"
		assert not OPTIONS.rebuild_recovery, "rebuild_recovery incompatible with bvb"
		assert not has_vendor, "VENDOR images currently incompatible with bvb"

		def banner(s):
		print "\n\n++++ " + s + " ++++\n\n"

		banner("boot")
		prebuilt_path = os.path.join(OPTIONS.input_tmp, "IMAGES", "boot.img")
		boot_image = None
		if os.path.exists(prebuilt_path):
		banner("boot")
		print "boot.img already exists in IMAGES/, no need to rebuild..."
		if OPTIONS.rebuild_recovery:
		boot_image = common.GetBootableImage(
		"IMAGES/boot.img", "boot.img", OPTIONS.input_tmp, "BOOT")
		else:
		if board_bvb_enable:
		# With Brillo Verified Boot, we need to build system.img before
		# boot.img since the latter includes the dm-verity root hash and
		# salt for the former.
		pass
		else:
		banner("boot")
		boot_image = common.GetBootableImage(
		"IMAGES/boot.img", "boot.img", OPTIONS.input_tmp, "BOOT")
		if boot_image:
		@@ -310,7 +344,17 @@ def AddImagesToTargetFiles(filename):
		recovery_image.AddToZip(output_zip)

		banner("system")
		AddSystem(output_zip, recovery_img=recovery_image, boot_img=boot_image)
		system_img_path = AddSystem(
		output_zip, recovery_img=recovery_image, boot_img=boot_image)
		if OPTIONS.info_dict.get("board_bvb_enable", None) == "true":
		# If we're using Brillo Verified Boot, we can now build boot.img
		# given that we have system.img.
		banner("boot")
		boot_image = common.GetBootableImage(
		"IMAGES/boot.img", "boot.img", OPTIONS.input_tmp, "BOOT",
		system_img_path=system_img_path)
		if boot_image:
		boot_image.AddToZip(output_zip)
		if has_vendor:
		banner("vendor")
		AddVendor(output_zip)

tools/releasetools/common.py

+115 −4

Original line number	Diff line number	Diff line
		@@ -473,8 +473,114 @@ def _BuildBootableImage(sourcedir, fs_config_file, info_dict=None,
		return data


		def _BuildBvbBootableImage(sourcedir, fs_config_file, system_img_path,
		info_dict=None, has_ramdisk=False):
		"""Build a bootable image compatible with Brillo Verified Boot from the
		specified sourcedir.

		Take a kernel, cmdline, system image path, and optionally a ramdisk
		directory from the input (in 'sourcedir'), and turn them into a boot
		image. Return the image data, or None if sourcedir does not appear
		to contains files for building the requested image.
		"""

		def make_ramdisk():
		ramdisk_img = tempfile.NamedTemporaryFile()

		if os.access(fs_config_file, os.F_OK):
		cmd = ["mkbootfs", "-f", fs_config_file,
		os.path.join(sourcedir, "RAMDISK")]
		else:
		cmd = ["mkbootfs", os.path.join(sourcedir, "RAMDISK")]
		p1 = Run(cmd, stdout=subprocess.PIPE)
		p2 = Run(["minigzip"], stdin=p1.stdout, stdout=ramdisk_img.file.fileno())

		p2.wait()
		p1.wait()
		assert p1.returncode == 0, "mkbootfs of %s ramdisk failed" % (sourcedir,)
		assert p2.returncode == 0, "minigzip of %s ramdisk failed" % (sourcedir,)

		return ramdisk_img

		if not os.access(os.path.join(sourcedir, "kernel"), os.F_OK):
		return None

		if has_ramdisk and not os.access(os.path.join(sourcedir, "RAMDISK"), os.F_OK):
		return None

		if info_dict is None:
		info_dict = OPTIONS.info_dict

		img = tempfile.NamedTemporaryFile()

		if has_ramdisk:
		ramdisk_img = make_ramdisk()

		# use BVBTOOL from environ, or "bvbtool" if empty or not set
		bvbtool = os.getenv('BVBTOOL') or "bvbtool"

		# First, create boot.img.
		cmd = [bvbtool, "make_boot_image"]

		fn = os.path.join(sourcedir, "cmdline")
		if os.access(fn, os.F_OK):
		cmd.append("--kernel_cmdline")
		cmd.append(open(fn).read().rstrip("\n"))

		cmd.extend(["--kernel", os.path.join(sourcedir, "kernel")])

		if has_ramdisk:
		cmd.extend(["--initrd", ramdisk_img.name])

		cmd.extend(["--rootfs_with_hashes", system_img_path])

		args = info_dict.get("board_bvb_make_boot_image_args", None)
		if args and args.strip():
		cmd.extend(shlex.split(args))

		rollback_index = info_dict.get("board_bvb_rollback_index", None)
		if rollback_index and rollback_index.strip():
		cmd.extend(["--rollback_index", rollback_index.strip()])

		cmd.extend(["--output", img.name])

		p = Run(cmd, stdout=subprocess.PIPE)
		p.communicate()
		assert p.returncode == 0, "bvbtool make_boot_image of %s image failed" % (
		os.path.basename(sourcedir),)

		# Then, sign boot.img.
		cmd = [bvbtool, "sign_boot_image", "--image", img.name]

		algorithm = info_dict.get("board_bvb_algorithm", None)
		key_path = info_dict.get("board_bvb_key_path", None)
		if algorithm and algorithm.strip() and key_path and key_path.strip():
		cmd.extend(["--algorithm", algorithm, "--key", key_path])
		else:
		cmd.extend(["--algorithm", "SHA256_RSA4096"])
		cmd.extend(["--key", "system/bvb/test/testkey_rsa4096.pem"])

		args = info_dict.get("board_bvb_sign_boot_image_args", None)
		if args and args.strip():
		cmd.extend(shlex.split(args))

		p = Run(cmd, stdout=subprocess.PIPE)
		p.communicate()
		assert p.returncode == 0, "bvbtool sign_boot_image of %s image failed" % (
		os.path.basename(sourcedir),)

		img.seek(os.SEEK_SET, 0)
		data = img.read()

		if has_ramdisk:
		ramdisk_img.close()
		img.close()

		return data


		def GetBootableImage(name, prebuilt_name, unpack_dir, tree_subdir,
		info_dict=None):
		info_dict=None, system_img_path=None):
		"""Return a File object with the desired bootable image.

		Look for it in 'unpack_dir'/BOOTABLE_IMAGES under the name 'prebuilt_name',
		@@ -504,6 +610,11 @@ def GetBootableImage(name, prebuilt_name, unpack_dir, tree_subdir,
		info_dict.get("recovery_as_boot") == "true")

		fs_config = "META/" + tree_subdir.lower() + "_filesystem_config.txt"
		if info_dict.get("board_bvb_enable", None) == "true":
		data = _BuildBvbBootableImage(os.path.join(unpack_dir, tree_subdir),
		os.path.join(unpack_dir, fs_config),
		system_img_path, info_dict, has_ramdisk)
		else:
		data = _BuildBootableImage(os.path.join(unpack_dir, tree_subdir),
		os.path.join(unpack_dir, fs_config),
		info_dict, has_ramdisk)