Android/frameworks_base
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Add a permission for Descrambler

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Most of the broadcast features don't require descrambler.
Use another permission to minimized the access and protect scrambled
contents.

Bug: 139308734
Test: make;
Change-Id: I3cfcf22ee6b0c9218d3db966b3f441d491d8dd03
This commit is contained in:
shubang
2020-02-13 11:21:48 -08:00
parent 0f7945a435
commit 333a51344b
4 changed files with 37 additions and 7 deletions
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3
api/system-current.txt
View File

@@ -17,6 +17,7 @@ package android {
field public static final String ACCESS_SHARED_LIBRARIES = "android.permission.ACCESS_SHARED_LIBRARIES";
field public static final String ACCESS_SHORTCUTS = "android.permission.ACCESS_SHORTCUTS";
field public static final String ACCESS_SURFACE_FLINGER = "android.permission.ACCESS_SURFACE_FLINGER";
field public static final String ACCESS_TV_DESCRAMBLER = "android.permission.ACCESS_TV_DESCRAMBLER";
field public static final String ACCESS_TV_TUNER = "android.permission.ACCESS_TV_TUNER";
field public static final String ACTIVITY_EMBEDDING = "android.permission.ACTIVITY_EMBEDDING";
field public static final String ADJUST_RUNTIME_PERMISSIONS_POLICY = "android.permission.ADJUST_RUNTIME_PERMISSIONS_POLICY";
@@ -4862,7 +4863,7 @@ package android.media.tv.tuner {
method @Nullable @RequiresPermission(android.Manifest.permission.ACCESS_TV_TUNER) public static android.media.tv.tuner.DemuxCapabilities getDemuxCapabilities(@NonNull android.content.Context);
method @Nullable @RequiresPermission(android.Manifest.permission.ACCESS_TV_TUNER) public android.media.tv.tuner.frontend.FrontendInfo getFrontendInfo();
method @Nullable public android.media.tv.tuner.frontend.FrontendStatus getFrontendStatus(@NonNull int[]);
method @Nullable @RequiresPermission(android.Manifest.permission.ACCESS_TV_TUNER) public android.media.tv.tuner.Descrambler openDescrambler();
method @Nullable @RequiresPermission(android.Manifest.permission.ACCESS_TV_DESCRAMBLER) public android.media.tv.tuner.Descrambler openDescrambler();
method @Nullable @RequiresPermission(android.Manifest.permission.ACCESS_TV_TUNER) public android.media.tv.tuner.dvr.DvrPlayback openDvrPlayback(long, @Nullable java.util.concurrent.Executor, @Nullable android.media.tv.tuner.dvr.OnPlaybackStatusChangedListener);
method @Nullable @RequiresPermission(android.Manifest.permission.ACCESS_TV_TUNER) public android.media.tv.tuner.dvr.DvrRecorder openDvrRecorder(long, @Nullable java.util.concurrent.Executor, @Nullable android.media.tv.tuner.dvr.OnRecordStatusChangedListener);
method @Nullable @RequiresPermission(android.Manifest.permission.ACCESS_TV_TUNER) public android.media.tv.tuner.filter.Filter openFilter(int, int, long, @Nullable java.util.concurrent.Executor, @Nullable android.media.tv.tuner.filter.FilterCallback);

8
core/res/AndroidManifest.xml
View File

@@ -4917,7 +4917,13 @@
<p>Not for use by third-party applications.
@hide -->
<permission android:name="android.permission.ACCESS_TV_TUNER"
android:protectionLevel="signature|privileged" />
android:protectionLevel="signature|privileged|vendorPrivileged" />
<!-- @SystemApi Allows an application to access descrambler of TV tuner HAL
<p>Not for use by third-party applications.
@hide -->
<permission android:name="android.permission.ACCESS_TV_DESCRAMBLER"
android:protectionLevel="signature|privileged|vendorPrivileged" />
<application android:process="system"
android:persistent="true"

4
media/java/android/media/tv/tuner/Tuner.java
View File

@@ -610,10 +610,10 @@ public class Tuner implements AutoCloseable {
*
* @return a {@link Descrambler} object.
*/
@RequiresPermission(android.Manifest.permission.ACCESS_TV_TUNER)
@RequiresPermission(android.Manifest.permission.ACCESS_TV_DESCRAMBLER)
@Nullable
public Descrambler openDescrambler() {
TunerUtils.checkTunerPermission(mContext);
TunerUtils.checkDescramblerPermission(mContext);
return nativeOpenDescrambler();
}

29
media/java/android/media/tv/tuner/TunerUtils.java
View File

@@ -27,7 +27,9 @@ import android.media.tv.tuner.filter.Filter;
* @hide
*/
public final class TunerUtils {
private static final String PERMISSION = android.Manifest.permission.ACCESS_TV_TUNER;
private static final String TUNER_PERMISSION = android.Manifest.permission.ACCESS_TV_TUNER;
private static final String DESCRAMBLER_PERMISSION =
android.Manifest.permission.ACCESS_TV_DESCRAMBLER;
/**
* Checks whether the caller has permission to access tuner.
@@ -36,9 +38,30 @@ public final class TunerUtils {
* @throws SecurityException if the caller doesn't have the permission.
*/
public static void checkTunerPermission(Context context) {
if (context.checkCallingOrSelfPermission(PERMISSION)
checkPermission(context, TUNER_PERMISSION);
}
/**
* Checks whether the caller has permission to access the descrambler.
*
* @param context context of the caller.
* @throws SecurityException if the caller doesn't have the permission.
*/
public static void checkDescramblerPermission(Context context) {
checkPermission(context, DESCRAMBLER_PERMISSION);
}
/**
* Checks whether the caller has the given permission.
*
* @param context context of the caller.
* @param permission the given permission.
* @throws SecurityException if the caller doesn't have the permission.
*/
public static void checkPermission(Context context, String permission) {
if (context.checkCallingOrSelfPermission(permission)
!= PackageManager.PERMISSION_GRANTED) {
throw new SecurityException("Caller must have " + PERMISSION + " permission.");
throw new SecurityException("Caller must have " + permission + " permission.");
}
}