Generate a separate fstab file for FIPS mode am: 08c8bc2e40

Original change: https://googleplex-android-review.googlesource.com/c/device/google/gs101/+/15522272

Change-Id: I989dad797866cc82ad11cf2bca3e705370689517

BoardConfig-common.mk

@@ -59,7 +59,17 @@ BOARD_USES_GENERIC_KERNEL_IMAGE := true
 BOARD_MOVE_RECOVERY_RESOURCES_TO_VENDOR_BOOT := true
 BOARD_MOVE_GSI_AVB_KEYS_TO_VENDOR_BOOT := true
 TARGET_RECOVERY_WIPE := device/google/gs101/conf/recovery.wipe
-TARGET_RECOVERY_FSTAB := device/google/gs101/conf/fstab.gs101
+
+# This is the fstab file that will be included in the recovery image.  Note that
+# recovery doesn't care about the encryption settings, so it doesn't matter
+# whether we use the normal or the fips fstab here.
+#
+# Since this is a generated file, it's necessary to use intermediates-dir-for in
+# order to refer to it correctly.  And since intermediates-dir-for isn't defined
+# yet when this file is included, it's necessary to use a deferred variable
+# assignment ( = ) rather than an immediate variable assignment ( := ).
+TARGET_RECOVERY_FSTAB = $(call intermediates-dir-for,ETC,fstab.gs101)/fstab.gs101
+
 TARGET_RECOVERY_PIXEL_FORMAT := ABGR_8888
 TARGET_RECOVERY_UI_MARGIN_HEIGHT := 165
 TARGET_RECOVERY_UI_LIB := \

conf/Android.bp

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// By default this device uses hardware-wrapped keys for storage encryption,
+// which is intended to offer increased security over the traditional method
+// (software keys).  However, hardware-wrapped keys aren't compatible with
+// FIPS-140 certification of the encryption hardware, and hence we have to
+// disable the use of them in FIPS mode.  This requires having two fstab files:
+// one for the default mode, and one for FIPS mode selectable via
+// androidboot.fstab_suffix on the kernel command line.  These fstabs should be
+// identical with the exception of the encryption settings, so to keep them in
+// sync the rules below generate them from a template file.
+
+genrule {
+    name: "gen_fstab.gs101",
+    srcs: ["fstab.gs101.in"],
+    out: ["fstab.gs101"],
+    cmd: "sed -e s/@fileencryption@/::inlinecrypt_optimized+wrappedkey_v0/" +
+        " -e s/@metadata_encryption@/:wrappedkey_v0/ $(in) > $(out)",
+}
+
+genrule {
+    name: "gen_fstab.gs101-fips",
+    srcs: ["fstab.gs101.in"],
+    out: ["fstab.gs101-fips"],
+    cmd: "sed -e s/@fileencryption@/aes-256-xts/" +
+        " -e s/@metadata_encryption@/aes-256-xts/ $(in) > $(out)",
+}
+
+prebuilt_etc {
+    name: "fstab.gs101",
+    src: ":gen_fstab.gs101",
+    vendor: true,
+    vendor_ramdisk_available: true,
+}
+
+prebuilt_etc {
+    name: "fstab.gs101-fips",
+    src: ":gen_fstab.gs101-fips",
+    vendor: true,
+    vendor_ramdisk_available: true,
+}

conf/fstab.gs101.in

@@ -17,7 +17,7 @@ vendor_dlkm                                              /vendor_dlkm
 /dev/block/platform/14700000.ufs/by-name/misc            /misc                       emmc    defaults                 wait
 /dev/block/platform/14700000.ufs/by-name/metadata        /metadata                   ext4    noatime,nosuid,nodev,data=journal,commit=1    wait,check,formattable,first_stage_mount,metadata_csum
 /dev/block/platform/14700000.ufs/by-name/pvmfw           /pvmfw                      emmc    defaults                 wait,slotselect,avb=pvmfw,first_stage_mount
-/dev/block/platform/14700000.ufs/by-name/userdata        /data                       f2fs    noatime,nosuid,nodev,discard,reserve_root=32768,resgid=1065,fsync_mode=nobarrier,inlinecrypt,compress_extension=apk,compress_extension=apex,compress_extension=so,atgc,checkpoint_merge    latemount,wait,check,quota,formattable,sysfs_path=/dev/sys/block/bootdevice,checkpoint=fs,reservedsize=128M,fileencryption=::inlinecrypt_optimized+wrappedkey_v0,metadata_encryption=:wrappedkey_v0,keydirectory=/metadata/vold/metadata_encryption,fscompress,readahead_size_kb=128
+/dev/block/platform/14700000.ufs/by-name/userdata        /data                       f2fs    noatime,nosuid,nodev,discard,reserve_root=32768,resgid=1065,fsync_mode=nobarrier,inlinecrypt,compress_extension=apk,compress_extension=apex,compress_extension=so,atgc,checkpoint_merge    latemount,wait,check,quota,formattable,sysfs_path=/dev/sys/block/bootdevice,checkpoint=fs,reservedsize=128M,fileencryption=@fileencryption@,metadata_encryption=@metadata_encryption@,keydirectory=/metadata/vold/metadata_encryption,fscompress,readahead_size_kb=128
 /dev/block/platform/14700000.ufs/by-name/vbmeta          /vbmeta                     emmc    defaults                 slotselect,first_stage_mount
 /dev/block/zram0                                         none                        swap    defaults                 zramsize=3221225472,max_comp_streams=8,zram_backingdev_size=512M
 /devices/platform/11110000.usb*                          auto                        vfat    defaults                 voldmanaged=usb:auto

conf/init.gs101.rc

@@ -306,7 +306,7 @@ on late-fs
     class_start animation
 
     # Mount RW partitions which need run fsck
-    mount_all /vendor/etc/fstab.gs101 --late
+    mount_all --late
 
 on post-fs-data
     # Log data folder
@@ -503,7 +503,7 @@ on property:persist.vendor.radio.no_modem_board=1
     setprop ro.radio.noril yes
 
 on fs
-    mount_all /vendor/etc/fstab.gs101 --early
+    mount_all --early
     restorecon_recursive /mnt/vendor/efs
     chown radio system /mnt/vendor/efs
     restorecon_recursive /mnt/vendor/efs_backup

device.mk

@@ -251,10 +251,13 @@ PRODUCT_COPY_FILES += \
 	device/google/gs101/conf/init.recovery.device.rc:$(TARGET_COPY_OUT_RECOVERY)/root/init.recovery.gs101.rc
 
 # Fstab files
+PRODUCT_PACKAGES += \
+	fstab.gs101 \
+	fstab.gs101.vendor_ramdisk \
+	fstab.gs101-fips \
+	fstab.gs101-fips.vendor_ramdisk
 PRODUCT_COPY_FILES += \
-	device/google/gs101/conf/fstab.gs101:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.gs101 \
+	device/google/gs101/conf/fstab.persist:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.persist
-	device/google/gs101/conf/fstab.persist:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.persist \
-	device/google/gs101/conf/fstab.gs101:$(TARGET_COPY_OUT_VENDOR_RAMDISK)/first_stage_ramdisk/fstab.gs101
 
 # Shell scripts
 PRODUCT_COPY_FILES += \