Merge "Allow carrier privileged apps to access Telephony/Subscription APIs." (19b9593c) · Commits · e / os / android_frameworks_base

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

+8 −4

Original line number	Diff line number	Diff line
		@@ -394,8 +394,10 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
		+ " callback.asBinder=" + callback.asBinder());
		}

		// TODO(b/70041899): Find a way to make this work for carrier-privileged callers.
		if (!TelephonyPermissions.checkCallingOrSelfReadPhoneState(
		mContext, callingPackage, "addOnSubscriptionsChangedListener")) {
		mContext, SubscriptionManager.INVALID_SUBSCRIPTION_ID, callingPackage,
		"addOnSubscriptionsChangedListener")) {
		return;
		}

		@@ -686,8 +688,9 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {

		private boolean canReadPhoneState(String callingPackage, String message) {
		try {
		// TODO(b/70041899): Find a way to make this work for carrier-privileged callers.
		return TelephonyPermissions.checkCallingOrSelfReadPhoneState(
		mContext, callingPackage, message);
		mContext, SubscriptionManager.INVALID_SUBSCRIPTION_ID, callingPackage, message);
		} catch (SecurityException e) {
		return false;
		}
		@@ -1735,8 +1738,9 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
		}

		if ((events & ENFORCE_PHONE_STATE_PERMISSION_MASK) != 0) {
		if (!TelephonyPermissions.checkCallingOrSelfReadPhoneState(
		mContext, callingPackage, message)) {
		// TODO(b/70041899): Find a way to make this work for carrier-privileged callers.
		if (!TelephonyPermissions.checkCallingOrSelfReadPhoneState(mContext,
		SubscriptionManager.INVALID_SUBSCRIPTION_ID, callingPackage, message)) {
		return false;
		}
		}

telephony/java/android/telephony/SubscriptionManager.java

+33 −4

Original line number	Diff line number	Diff line
		@@ -17,9 +17,11 @@
		package android.telephony;

		import android.annotation.NonNull;
		import android.annotation.RequiresPermission;
		import android.annotation.SdkConstant;
		import android.annotation.SystemApi;
		import android.annotation.SdkConstant.SdkConstantType;
		import android.annotation.SuppressAutoDoc;
		import android.annotation.SystemApi;
		import android.annotation.SystemService;
		import android.content.Context;
		import android.content.Intent;
		@@ -47,9 +49,6 @@ import java.util.List;
		/**
		* SubscriptionManager is the application interface to SubscriptionController
		* and provides information about the current Telephony Subscriptions.
		* <p>
		* All SDK public methods require android.Manifest.permission.READ_PHONE_STATE unless otherwise
		* specified.
		*/
		@SystemService(Context.TELEPHONY_SUBSCRIPTION_SERVICE)
		public class SubscriptionManager {
		@@ -542,6 +541,8 @@ public class SubscriptionManager {
		* @param listener an instance of {@link OnSubscriptionsChangedListener} with
		* onSubscriptionsChanged overridden.
		*/
		// TODO(b/70041899): Find a way to extend this to carrier-privileged apps.
		@RequiresPermission(android.Manifest.permission.READ_PHONE_STATE)
		public void addOnSubscriptionsChangedListener(OnSubscriptionsChangedListener listener) {
		String pkgName = mContext != null ? mContext.getOpPackageName() : "<unknown>";
		if (DBG) {
		@@ -590,9 +591,15 @@ public class SubscriptionManager {
		/**
		* Get the active SubscriptionInfo with the input subId.
		*
		* <p>Requires Permission: {@link android.Manifest.permission#READ_PHONE_STATE READ_PHONE_STATE}
		* or that the calling app has carrier privileges (see
		* {@link TelephonyManager#hasCarrierPrivileges}).
		*
		* @param subId The unique SubscriptionInfo key in database.
		* @return SubscriptionInfo, maybe null if its not active.
		*/
		@SuppressAutoDoc // Blocked by b/72967236 - no support for carrier privileges
		@RequiresPermission(android.Manifest.permission.READ_PHONE_STATE)
		public SubscriptionInfo getActiveSubscriptionInfo(int subId) {
		if (VDBG) logd("[getActiveSubscriptionInfo]+ subId=" + subId);
		if (!isValidSubscriptionId(subId)) {
		@@ -646,9 +653,16 @@ public class SubscriptionManager {

		/**
		* Get the active SubscriptionInfo associated with the slotIndex
		*
		* <p>Requires Permission: {@link android.Manifest.permission#READ_PHONE_STATE READ_PHONE_STATE}
		* or that the calling app has carrier privileges (see
		* {@link TelephonyManager#hasCarrierPrivileges}).
		*
		* @param slotIndex the slot which the subscription is inserted
		* @return SubscriptionInfo, maybe null if its not active
		*/
		@SuppressAutoDoc // Blocked by b/72967236 - no support for carrier privileges
		@RequiresPermission(android.Manifest.permission.READ_PHONE_STATE)
		public SubscriptionInfo getActiveSubscriptionInfoForSimSlotIndex(int slotIndex) {
		if (VDBG) logd("[getActiveSubscriptionInfoForSimSlotIndex]+ slotIndex=" + slotIndex);
		if (!isValidSlotIndex(slotIndex)) {
		@@ -700,6 +714,11 @@ public class SubscriptionManager {
		* Get the SubscriptionInfo(s) of the currently inserted SIM(s). The records will be sorted
		* by {@link SubscriptionInfo#getSimSlotIndex} then by {@link SubscriptionInfo#getSubscriptionId}.
		*
		* <p>Requires Permission: {@link android.Manifest.permission#READ_PHONE_STATE READ_PHONE_STATE}
		* or that the calling app has carrier privileges (see
		* {@link TelephonyManager#hasCarrierPrivileges}). In the latter case, only records accessible
		* to the calling app are returned.
		*
		* @return Sorted list of the currently {@link SubscriptionInfo} records available on the device.
		* <ul>
		* <li>
		@@ -716,6 +735,8 @@ public class SubscriptionManager {
		* </li>
		* </ul>
		*/
		@SuppressAutoDoc // Blocked by b/72967236 - no support for carrier privileges
		@RequiresPermission(android.Manifest.permission.READ_PHONE_STATE)
		public List<SubscriptionInfo> getActiveSubscriptionInfoList() {
		List<SubscriptionInfo> result = null;

		@@ -858,10 +879,18 @@ public class SubscriptionManager {
		}

		/**
		*
		* Requires Permission: {@link android.Manifest.permission#READ_PHONE_STATE READ_PHONE_STATE}
		* or that the calling app has carrier privileges (see
		* {@link TelephonyManager#hasCarrierPrivileges}). In the latter case, the count will include
		* only those subscriptions accessible to the caller.
		*
		* @return the current number of active subscriptions. There is no guarantee the value
		* returned by this method will be the same as the length of the list returned by
		* {@link #getActiveSubscriptionInfoList}.
		*/
		@SuppressAutoDoc // Blocked by b/72967236 - no support for carrier privileges
		@RequiresPermission(android.Manifest.permission.READ_PHONE_STATE)
		public int getActiveSubscriptionInfoCount() {
		int result = 0;

telephony/java/android/telephony/TelephonyManager.java

+197 −146

File changed.

Preview size limit exceeded, changes collapsed.

telephony/java/com/android/internal/telephony/TelephonyPermissions.java

+64 −19

Original line number	Diff line number	Diff line
		@@ -26,7 +26,8 @@ import android.telephony.SubscriptionManager;
		import android.telephony.TelephonyManager;

		import com.android.internal.annotations.VisibleForTesting;
		import com.android.internal.telephony.ITelephony;

		import java.util.function.Supplier;

		/** Utility class for Telephony permission enforcement. */
		public final class TelephonyPermissions {
		@@ -34,6 +35,9 @@ public final class TelephonyPermissions {

		private static final boolean DBG = false;

		private static final Supplier<ITelephony> TELEPHONY_SUPPLIER = () ->
		ITelephony.Stub.asInterface(ServiceManager.getService(Context.TELEPHONY_SERVICE));

		private TelephonyPermissions() {}

		/**
		@@ -41,8 +45,8 @@ public final class TelephonyPermissions {
		*
		* <p>This method behaves in one of the following ways:
		* <ul>
		* <li>return true: if the caller has either the READ_PRIVILEGED_PHONE_STATE permission or the
		* READ_PHONE_STATE runtime permission.
		* <li>return true: if the caller has the READ_PRIVILEGED_PHONE_STATE permission, the
		* READ_PHONE_STATE runtime permission, or carrier privileges on the given subId.
		* <li>throw SecurityException: if the caller didn't declare any of these permissions, or, for
		* apps which support runtime permissions, if the caller does not currently have any of
		* these permissions.
		@@ -51,10 +55,20 @@ public final class TelephonyPermissions {
		* manually (via AppOps). In this case we can't throw as it would break app compatibility,
		* so we return false to indicate that the calling function should return dummy data.
		* </ul>
		*
		* <p>Note: for simplicity, this method always returns false for callers using legacy
		* permissions and who have had READ_PHONE_STATE revoked, even if they are carrier-privileged.
		* Such apps should migrate to runtime permissions or stop requiring READ_PHONE_STATE on P+
		* devices.
		*
		* @param subId the subId of the relevant subscription; used to check carrier privileges. May be
		* {@link SubscriptionManager#INVALID_SUBSCRIPTION_ID} to skip this check for cases
		* where it isn't relevant (hidden APIs, or APIs which are otherwise okay to leave
		* inaccesible to carrier-privileged apps).
		*/
		public static boolean checkCallingOrSelfReadPhoneState(
		Context context, String callingPackage, String message) {
		return checkReadPhoneState(context, Binder.getCallingPid(), Binder.getCallingUid(),
		Context context, int subId, String callingPackage, String message) {
		return checkReadPhoneState(context, subId, Binder.getCallingPid(), Binder.getCallingUid(),
		callingPackage, message);
		}

		@@ -63,8 +77,8 @@ public final class TelephonyPermissions {
		*
		* <p>This method behaves in one of the following ways:
		* <ul>
		* <li>return true: if the caller has either the READ_PRIVILEGED_PHONE_STATE permission or the
		* READ_PHONE_STATE runtime permission.
		* <li>return true: if the caller has the READ_PRIVILEGED_PHONE_STATE permission, the
		* READ_PHONE_STATE runtime permission, or carrier privileges on the given subId.
		* <li>throw SecurityException: if the caller didn't declare any of these permissions, or, for
		* apps which support runtime permissions, if the caller does not currently have any of
		* these permissions.
		@@ -73,9 +87,22 @@ public final class TelephonyPermissions {
		* manually (via AppOps). In this case we can't throw as it would break app compatibility,
		* so we return false to indicate that the calling function should return dummy data.
		* </ul>
		*
		* <p>Note: for simplicity, this method always returns false for callers using legacy
		* permissions and who have had READ_PHONE_STATE revoked, even if they are carrier-privileged.
		* Such apps should migrate to runtime permissions or stop requiring READ_PHONE_STATE on P+
		* devices.
		*/
		public static boolean checkReadPhoneState(
		Context context, int pid, int uid, String callingPackage, String message) {
		Context context, int subId, int pid, int uid, String callingPackage, String message) {
		return checkReadPhoneState(
		context, TELEPHONY_SUPPLIER, subId, pid, uid, callingPackage, message);
		}

		@VisibleForTesting
		public static boolean checkReadPhoneState(
		Context context, Supplier<ITelephony> telephonySupplier, int subId, int pid, int uid,
		String callingPackage, String message) {
		try {
		context.enforcePermission(
		android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE, pid, uid, message);
		@@ -83,8 +110,18 @@ public final class TelephonyPermissions {
		// SKIP checking for run-time permission since caller has PRIVILEGED permission
		return true;
		} catch (SecurityException privilegedPhoneStateException) {
		try {
		context.enforcePermission(
		android.Manifest.permission.READ_PHONE_STATE, pid, uid, message);
		} catch (SecurityException phoneStateException) {
		// If we don't have the runtime permission, but do have carrier privileges, that
		// suffices for reading phone state.
		if (SubscriptionManager.isValidSubscriptionId(subId)) {
		enforceCarrierPrivilege(telephonySupplier, subId, uid, message);
		return true;
		}
		throw phoneStateException;
		}
		}

		// We have READ_PHONE_STATE permission, so return true as long as the AppOps bit hasn't been
		@@ -101,14 +138,16 @@ public final class TelephonyPermissions {
		* default SMS app and apps with READ_SMS or READ_PHONE_NUMBERS can also read phone numbers.
		*/
		public static boolean checkCallingOrSelfReadPhoneNumber(
		Context context, String callingPackage, String message) {
		Context context, int subId, String callingPackage, String message) {
		return checkReadPhoneNumber(
		context, Binder.getCallingPid(), Binder.getCallingUid(), callingPackage, message);
		context, TELEPHONY_SUPPLIER, subId, Binder.getCallingPid(), Binder.getCallingUid(),
		callingPackage, message);
		}

		@VisibleForTesting
		public static boolean checkReadPhoneNumber(
		Context context, int pid, int uid, String callingPackage, String message) {
		Context context, Supplier<ITelephony> telephonySupplier, int subId, int pid, int uid,
		String callingPackage, String message) {
		// Default SMS app can always read it.
		AppOpsManager appOps = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
		if (appOps.noteOp(AppOpsManager.OP_WRITE_SMS, uid, callingPackage) ==
		@@ -121,7 +160,8 @@ public final class TelephonyPermissions {

		// First, check if we can read the phone state.
		try {
		return checkReadPhoneState(context, pid, uid, callingPackage, message);
		return checkReadPhoneState(
		context, telephonySupplier, subId, pid, uid, callingPackage, message);
		} catch (SecurityException readPhoneStateSecurityException) {
		}
		// Can be read with READ_SMS too.
		@@ -186,16 +226,21 @@ public final class TelephonyPermissions {
		}

		private static void enforceCarrierPrivilege(int subId, int uid, String message) {
		if (getCarrierPrivilegeStatus(subId, uid) !=
		enforceCarrierPrivilege(TELEPHONY_SUPPLIER, subId, uid, message);
		}

		private static void enforceCarrierPrivilege(
		Supplier<ITelephony> telephonySupplier, int subId, int uid, String message) {
		if (getCarrierPrivilegeStatus(telephonySupplier, subId, uid) !=
		TelephonyManager.CARRIER_PRIVILEGE_STATUS_HAS_ACCESS) {
		if (DBG) Rlog.e(LOG_TAG, "No Carrier Privilege.");
		throw new SecurityException(message);
		}
		}

		private static int getCarrierPrivilegeStatus(int subId, int uid) {
		ITelephony telephony =
		ITelephony.Stub.asInterface(ServiceManager.getService(Context.TELEPHONY_SERVICE));
		private static int getCarrierPrivilegeStatus(
		Supplier<ITelephony> telephonySupplier, int subId, int uid) {
		ITelephony telephony = telephonySupplier.get();
		try {
		if (telephony != null) {
		return telephony.getCarrierPrivilegeStatusForUid(subId, uid);