Add SystemApi for retrieving device flash lock state (74e9b18b) · Commits · e / os / android_frameworks_base

api/system-current.txt

+8 −0

Original line number	Diff line number	Diff line
		@@ -37049,6 +37049,7 @@ package android.service.persistentdata {

		public abstract interface IPersistentDataBlockService implements android.os.IInterface {
		method public abstract int getDataBlockSize() throws android.os.RemoteException;
		method public abstract int getFlashLockState() throws android.os.RemoteException;
		method public abstract long getMaximumDataBlockSize() throws android.os.RemoteException;
		method public abstract boolean getOemUnlockEnabled() throws android.os.RemoteException;
		method public abstract byte[] read() throws android.os.RemoteException;
		@@ -37060,12 +37061,19 @@ package android.service.persistentdata {
		public class PersistentDataBlockManager {
		ctor public PersistentDataBlockManager(android.service.persistentdata.IPersistentDataBlockService);
		method public int getDataBlockSize();
		method public int getFlashLockState();
		method public long getMaximumDataBlockSize();
		method public boolean getOemUnlockEnabled();
		method public byte[] read();
		method public void setOemUnlockEnabled(boolean);
		method public void wipe();
		method public int write(byte[]);
		field public static final int FLASH_LOCK_LOCKED = 1; // 0x1
		field public static final int FLASH_LOCK_UNKNOWN = -1; // 0xffffffff
		field public static final int FLASH_LOCK_UNLOCKED = 0; // 0x0
		}

		public static abstract class PersistentDataBlockManager.FlashLockState implements java.lang.annotation.Annotation {
		}

		}

core/java/android/service/persistentdata/IPersistentDataBlockService.aidl

+2 −0

Original line number	Diff line number	Diff line
		@@ -35,4 +35,6 @@ interface IPersistentDataBlockService {

		void setOemUnlockEnabled(boolean enabled);
		boolean getOemUnlockEnabled();
		int getFlashLockState();
		}

core/java/android/service/persistentdata/PersistentDataBlockManager.java

+43 −0

Original line number	Diff line number	Diff line
		@@ -17,9 +17,13 @@
		package android.service.persistentdata;

		import android.annotation.SystemApi;
		import android.annotation.IntDef;
		import android.os.RemoteException;
		import android.util.Slog;

		import java.lang.annotation.Retention;
		import java.lang.annotation.RetentionPolicy;

		/**
		* Interface for reading and writing data blocks to a persistent partition.
		*
		@@ -43,6 +47,27 @@ public class PersistentDataBlockManager {
		private static final String TAG = PersistentDataBlockManager.class.getSimpleName();
		private IPersistentDataBlockService sService;

		/**
		* Indicates that the device's bootloader lock state is UNKNOWN.
		*/
		public static final int FLASH_LOCK_UNKNOWN = -1;
		/**
		* Indicates that the device's bootloader is UNLOCKED.
		*/
		public static final int FLASH_LOCK_UNLOCKED = 0;
		/**
		* Indicates that the device's bootloader is LOCKED.
		*/
		public static final int FLASH_LOCK_LOCKED = 1;

		@IntDef({
		FLASH_LOCK_UNKNOWN,
		FLASH_LOCK_LOCKED,
		FLASH_LOCK_UNLOCKED,
		})
		@Retention(RetentionPolicy.SOURCE)
		public @interface FlashLockState {}

		public PersistentDataBlockManager(IPersistentDataBlockService service) {
		sService = service;
		}
		@@ -140,6 +165,24 @@ public class PersistentDataBlockManager {
		}
		}

		/**
		* Retrieves available information about this device's flash lock state.
		*
		* @return FLASH_LOCK_STATE_LOCKED if device bootloader is locked,
		* FLASH_LOCK_STATE_UNLOCKED if device bootloader is unlocked,
		* or FLASH_LOCK_STATE unknown if this information cannot be ascertained
		* on this device.
		*/
		@FlashLockState
		public int getFlashLockState() {
		try {
		return sService.getFlashLockState();
		} catch (RemoteException e) {
		onError("getting flash lock state");
		return FLASH_LOCK_UNKNOWN;
		}
		}

		private void onError(String msg) {
		Slog.v(TAG, "Remote exception while " + msg);
		}

services/core/java/com/android/server/PersistentDataBlockService.java

+18 −0

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@ import android.os.SystemProperties;
		import android.os.UserHandle;
		import android.os.UserManager;
		import android.service.persistentdata.IPersistentDataBlockService;
		import android.service.persistentdata.PersistentDataBlockManager;
		import android.util.Slog;

		import com.android.internal.R;
		@@ -72,6 +73,9 @@ public class PersistentDataBlockService extends SystemService {
		private static final int MAX_DATA_BLOCK_SIZE = 1024 * 100;
		public static final int DIGEST_SIZE_BYTES = 32;
		private static final String OEM_UNLOCK_PROP = "sys.oem_unlock_allowed";
		private static final String FLASH_LOCK_PROP = "ro.boot.flash.locked";
		private static final String FLASH_LOCK_LOCKED = "1";
		private static final String FLASH_LOCK_UNLOCKED = "0";

		private final Context mContext;
		private final String mDataBlockFile;
		@@ -453,6 +457,20 @@ public class PersistentDataBlockService extends SystemService {
		return doGetOemUnlockEnabled();
		}

		@Override
		public int getFlashLockState() {
		enforceOemUnlockPermission();
		String locked = SystemProperties.get(FLASH_LOCK_PROP);
		switch (locked) {
		case FLASH_LOCK_LOCKED:
		return PersistentDataBlockManager.FLASH_LOCK_LOCKED;
		case FLASH_LOCK_UNLOCKED:
		return PersistentDataBlockManager.FLASH_LOCK_UNLOCKED;
		default:
		return PersistentDataBlockManager.FLASH_LOCK_UNKNOWN;
		}
		}

		@Override
		public int getDataBlockSize() {
		enforcePersistentDataBlockAccess();