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Commit 3762ada1 authored by Eric Biggers's avatar Eric Biggers
Browse files

Stop trying to update FDE password from LockSettingsService 

Since FDE is no longer supported, updating the FDE password never does
anything.  Stop trying to do so.  Remove updateEncryptionPassword() from
ILockSettings, since its only caller outside of LockSettingsService
itself was in LockPatternUtils, and the previous CL removed that caller.

Bug: 208476087
Change-Id: I46c2a472177836f0c9084e4c3b4ed2e6c0ab61d5
parent 8e265a9f

core/java/com/android/internal/widget/ILockSettings.aidl

+0 −1
Original line number Diff line number Diff line
@@ -96,7 +96,6 @@ interface ILockSettings { 
    boolean hasSecureLockScreen();

    boolean tryUnlockWithCachedUnifiedChallenge(int userId);

    void removeCachedUnifiedChallenge(int userId);

    void updateEncryptionPassword(int type, in byte[] password);

    boolean registerWeakEscrowTokenRemovedListener(in IWeakEscrowTokenRemovedListener listener);

    boolean unregisterWeakEscrowTokenRemovedListener(in IWeakEscrowTokenRemovedListener listener);

    long addWeakEscrowToken(in byte[] token, int userId, in IWeakEscrowTokenActivatedListener callback);

services/core/java/com/android/server/locksettings/LockSettingsService.java

+4 −49
Original line number Diff line number Diff line
@@ -1796,7 +1796,10 @@ public class LockSettingsService extends ILockSettings.Stub { 
    }



    private void onPostPasswordChanged(LockscreenCredential newCredential, int userHandle) {

        updateEncryptionPasswordIfNeeded(newCredential, userHandle);

        if (userHandle == UserHandle.USER_SYSTEM && isDeviceEncryptionEnabled() &&

            shouldEncryptWithCredentials() && newCredential.isNone()) {

            setCredentialRequiredToDecrypt(false);

        }

        if (newCredential.isPattern()) {

            setBoolean(LockPatternUtils.PATTERN_EVER_CHOSEN_KEY, true, userHandle);

        }
@@ -1804,26 +1807,6 @@ public class LockSettingsService extends ILockSettings.Stub { 
        mContext.getSystemService(TrustManager.class).reportEnabledTrustAgentsChanged(userHandle);

    }



    /**

     * Update device encryption password if calling user is USER_SYSTEM and device supports

     * encryption.

     */

    private void updateEncryptionPasswordIfNeeded(LockscreenCredential credential, int userHandle) {

        // Update the device encryption password.

        if (userHandle != UserHandle.USER_SYSTEM || !isDeviceEncryptionEnabled()) {

            return;

        }

        if (!shouldEncryptWithCredentials()) {

            updateEncryptionPassword(StorageManager.CRYPT_TYPE_DEFAULT, null);

            return;

        }

        if (credential.isNone()) {

            // Set the encryption password to default.

            setCredentialRequiredToDecrypt(false);

        }

        updateEncryptionPassword(credential.getStorageCryptType(), credential.getCredential());

    }



    /**

     * Store the hash of the *current* password in the password history list, if device policy

     * enforces password history requirement.
@@ -1938,34 +1921,6 @@ public class LockSettingsService extends ILockSettings.Stub { 
        }

    }



    /** Update the encryption password if it is enabled **/

    @Override

    public void updateEncryptionPassword(final int type, final byte[] password) {

        if (!hasSecureLockScreen() && password != null && password.length != 0) {

            throw new UnsupportedOperationException(

                    "This operation requires the lock screen feature.");

        }

        if (!isDeviceEncryptionEnabled()) {

            return;

        }

        final IBinder service = ServiceManager.getService("mount");

        if (service == null) {

            Slog.e(TAG, "Could not find the mount service to update the encryption password");

            return;

        }



        // TODO(b/120484642): This is a location where we still use a String for vold

        String passwordString = password != null ? new String(password) : null;

        mHandler.post(() -> {

            IStorageManager storageManager = mInjector.getStorageManager();

            try {

                storageManager.changeEncryptionPassword(type, passwordString);

            } catch (RemoteException e) {

                Slog.e(TAG, "Error changing encryption password", e);

            }

        });

    }



    /** Register the given WeakEscrowTokenRemovedListener. */

    @Override

    public boolean registerWeakEscrowTokenRemovedListener(