Where metadata encryption is enabled, if there is no metadata encryption
key present and we are generating one anew, then there has been a
factory reset, and this is the first key to be generated. We then call
deleteAllKeys to ensure data from before the factory reset is securely
deleted.
This shouldn't really be necessary; the factory reset call itself
should be doing this. However there are currently three factory reset
paths (settings, recovery, fastboot -w) and it is not clear that all
three are doing this correctly on all devices. Obviously an attacker
can prevent this code from being run by running a version of the OS
that does not include this change; however, if the bootloader is
locked, then keys will be version bound such that they will only work
on locked devices with a sufficiently recent version of the OS. If
every sufficiently recent signed version of the OS includes this change
the attack is defeated.
Bug: 187105270
Test: booted Cuttlefish twice, checked logs
Ignore-AOSP-First: no merge path to this branch from AOSP.
Merged-In: I9c5c547140e8b1bbffb9c1d215f75251f0f1354e
Change-Id: I9c5c547140e8b1bbffb9c1d215f75251f0f1354e
Don't call IKeystoreMaintenance::earlyBootEnded() too early on FDE
devices, so that keystore2 doesn't have to be restarted.
Bug: 192090857
Test: Tested FDE on Cuttlefish, both first and non-first boots.
Verified via log that earlyBootEnded is now called only when it
should be, and that keystore2 no longer has to be restarted.
Change-Id: I03f816db194a8276ad19ca99b3c8894e8a5fed23
(cherry picked from commit 4859e0ca0f)
Merged-In: I03f816db194a8276ad19ca99b3c8894e8a5fed23
Revert "Change mounting storage data and obb flag to on by default"
Revert "Remove storage app data isolation checking in CTS"
Revert submission 14325408-enable_storage_iso_2
Reason for revert: b/187939590
Reverted Changes:
I6391b7381:Change mounting storage data and obb flag to on by...
Ic2f3d1be2:Remove storage app data isolation checking in CTS
Iffa8339b1:Change mounting storage data and obb flag to on by...
Bug: 187939590
Bug: 148049767
Change-Id: I8ef3e6fe0210bdf58e1292605ac1cc33a2eaafea
storeKeyAtomically() stores keys in a temp directory before renaming
that directory to the real target directory. However when the key is
stored in the temporary directory, the Keymaster storage key might get
upgraded, and it's possible that the temp directory is scheduled for a
deferred commit. storeKeyAtomically() renames that temp directory, but
doesn't update the list of directories marked for deferred commit.
This patch fixes this by removing the temp directory from the list and
adding the real target directory to that list instead.
This bug was found when trying to switch from using the guest keymint to
using the host remote keymint implementation on cuttlefish
(aosp/1701925). The device triggers this bug (and boots to recovery)
when aosp/1701925 is cherry-picked.
Co-Developed-By: Eric Biggers <ebiggers@google.com>
Test: Cuttlefish boots with and without aosp/1701925
Change-Id: I3b6fd6ad32ed415da94423cca6f5a121c16472f2
* changes:
Remove unused constants and cleanup KeyStorage.cpp
Remove unused parameter "salt" from stretchSecret()
Use AServiceManager_waitForService() to connect to keystore2
Now that the salt and hardware auth token related code has been removed,
we can remove the associated (and now unused) constants.
Also cleanup some comments and remove includes related to hardware auth
token support.
Bug: 181910578
Test: Cuttlefish boots.
Change-Id: I3733d5c6bbf6989adc165c554ee53faa2484f4b6
stretchSecret() no longer uses the "salt" parameter, so remove it and
simplify callers
Bug: 181910578
Test: Cuttlefish boots.
Change-Id: Ic2d0742b22b98a66da37f435e274c9d385b8e188
Vold currently uses AServiceManager_getService() to connect to
keystore2, which has an internal timeout of 5s. Since a lot of vold
keystore2 connection failures are fatal, we instead use
AServiceManager_waitForService(), which will wait efficiently for
keystore2 to start, instead of timing out after 5s.
Bug: 185934601
Test: Cuttlefish boots.
Change-Id: Ib4e977a997e020082382e0686f448d1aa72834ec
In wait_and_unmount(), kill the processes with open files after umount()
has been failing for 2 seconds rather than 17 seconds. This avoids a
long boot delay on devices that use FDE.
Detailed explanation:
On FDE devices, vold needs to unmount the tmpfs /data in order to mount
the real, decrypted /data. On first boot, it also needs to unmount the
unencrypted /data in order to encrypt it in-place.
/data can't be unmounted if files are open inside it. In theory, init
is responsible for killing all processes with open files in /data, via
the property trigger "vold.decrypt=trigger_shutdown_framework".
However, years ago, commit 6e8440fd50 ("cryptfs: kill processes with
open files on tmpfs /data") added a fallback where vold kills the
processes itself. Since then, in practice people have increasingly been
relying on this fallback, as services keep being added that use /data
but don't get stopped by trigger_shutdown_framework.
This is slowing down boot, as vold sleeps for 17 seconds before it
actually kills the processes.
The problematic services include services that are now started
explicitly in the post-fs-data trigger rather than implicitly as part of
a class (e.g., tombstoned), as well as services that now need to be
started as part of one of the early-boot classes like core or early_hal
but can still open files in /data later (e.g. keystore2 and credstore).
Another complication is that on default-encrypted devices (devices with
no PIN/pattern/password), trigger_shutdown_framework isn't run at all,
but rather it's expected that the relevant services simply weren't
started yet. This means that we can't fix the problem just by fixing
trigger_shutdown_framework to kill all the needed processes.
Therefore, given that the vold fallback is being relied on in practice,
and FDE won't be supported much longer anyway (so simple fixes are very
much preferable here), let's just change wait_and_unmount() in vold to
use more appropriate timeouts. Instead of waiting for 17 seconds before
killing processes, just wait for 2 seconds. Keep the total timeout of
20 seconds, but spend most of it retrying killing the processes, and
only if the unmount is still failing.
This avoids the long boot delays in practice.
Bug: 187231646
Bug: 186165644
Test: Tested FDE on Cuttlefish, and checked logcat to verify that the
boot delay is gone.
Change-Id: Id06a9615a87988c8336396c49ee914b35f8d585b
Otherwise only the pids are shown, and it's hard to tell which
processes actually got killed.
Bug: 187231646
Change-Id: Icccf60d0ad4439d702f36ace31abe092df1c69c2
Otherwise, when system removes user's volume, it will hang
as there are mounts (obb and data mounts) still remain mounted in system.
Bug: 187122943
Test: atest UserLifecycleTests#managedProfileUnlock_stopped, it's not blocked anymore
Change-Id: Ic37985f98e6cbfe4fa38b981d3332c4dfc40c5b8
Otherwise, the only sign of what went wrong may be system_server
logging a "ServiceSpecificException".
Bug: 187079978
Change-Id: I59b2ba2b0e679dfd1ec1fd8fff6790256fbfdf29
Originally it kills all the apps with obb and data mounted.
Due to recent changes, all apps will have obb and data dirs mounted
in default root namespace. Hence all apps will be killed by
by KillProcessesWithMounts().
To fix this, we also check if the dir is mounted as tmpfs,
as the default namespace one is bind mounted to lowerfs,
which app data isolation is mounted as tmpfs, so we only
kill the process that have obb dir mounted as tmpfs.
Bug: 148049767
Test: Able to boot without warnings
Change-Id: I5f862ad6f64f5df739b68ea7c9815352bae3be5c
Merged-In: I45d9a63ed47cbc27aebb63357a43f51ad62275db
