4e34e0ac28
Without this flag, fscrypt will return error for any filesystem operation involving the partitions mounted with the fileencryption=::inlinecrypt_optimized flag. Bug: 241606997 Test: enable KDN, switch to :gen_fstab.foo-hw-encrypt Signed-off-by: Kenny Root <kroot@google.com> Change-Id: I9601fcdfa627df4e67f1586cd32ceef3c1f9ecac
76 lines
2.7 KiB
Text
76 lines
2.7 KiB
Text
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// By default this device uses hardware-wrapped keys for storage encryption,
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// which is intended to offer increased security over the traditional method
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// (software keys). However, hardware-wrapped keys aren't compatible with
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// FIPS-140 certification of the encryption hardware, and hence we have to
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// disable the use of them in FIPS mode. This requires having two fstab files:
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// one for the default mode, and one for FIPS mode selectable via
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// androidboot.fstab_suffix on the kernel command line. These fstabs should be
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// identical with the exception of the encryption settings, so to keep them in
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// sync the rules below generate them from a template file.
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package {
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// See: http://go/android-license-faq
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// A large-scale-change added 'default_applicable_licenses' to import
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// all of the 'license_kinds' from "device_google_zuma_license"
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// to get the below license kinds:
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// SPDX-license-identifier-Apache-2.0
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default_applicable_licenses: ["device_google_zuma_license"],
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}
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genrule {
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name: "gen_fstab.zuma-hw-encrypt",
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srcs: ["fstab.zuma.in"],
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out: ["fstab.zuma"],
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cmd: "sed -e s/@fileencryption@/::inlinecrypt_optimized+wrappedkey_v0/" +
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" -e s/@inlinecrypt@/inlinecrypt/ " +
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" -e s/@metadata_encryption@/:wrappedkey_v0/ $(in) > $(out)",
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}
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genrule {
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name: "gen_fstab.zuma-sw-encrypt",
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srcs: ["fstab.zuma.in"],
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out: ["fstab.zuma"],
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cmd: "sed -e s/@fileencryption@/aes-256-xts/" +
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" -e s/@inlinecrypt@// " +
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" -e s/@metadata_encryption@// $(in) > $(out)",
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}
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genrule {
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name: "gen_fstab.zuma-fips",
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srcs: ["fstab.zuma.in"],
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out: ["fstab.zuma-fips"],
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cmd: "sed -e s/@fileencryption@/aes-256-xts/" +
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" -e s/@inlinecrypt@/inlinecrypt/ " +
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" -e s/@metadata_encryption@/aes-256-xts/ $(in) > $(out)",
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}
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// TODO: change below to gen_fstab.zuma-hw-encrypt once GSA is ready
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prebuilt_etc {
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name: "fstab.zuma",
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src: ":gen_fstab.zuma-sw-encrypt",
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vendor: true,
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vendor_ramdisk_available: true,
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}
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prebuilt_etc {
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name: "fstab.zuma-fips",
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src: ":gen_fstab.zuma-fips",
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vendor: true,
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vendor_ramdisk_available: true,
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}
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